diff options
Diffstat (limited to 'fs')
145 files changed, 3220 insertions, 2698 deletions
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index c37149b..f0d268b 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -1,15 +1,11 @@ -/* -*- c -*- ------------------------------------------------------------- * - * - * linux/fs/autofs/autofs_i.h - * - * Copyright 1997-1998 Transmeta Corporation - All Rights Reserved - * Copyright 2005-2006 Ian Kent <raven@themaw.net> +/* + * Copyright 1997-1998 Transmeta Corporation - All Rights Reserved + * Copyright 2005-2006 Ian Kent <raven@themaw.net> * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ----------------------------------------------------------------------- */ + */ /* Internal header file for autofs */ @@ -35,28 +31,23 @@ #include <linux/mount.h> #include <linux/namei.h> #include <asm/current.h> -#include <asm/uaccess.h> +#include <linux/uaccess.h> /* #define DEBUG */ -#define DPRINTK(fmt, ...) \ - pr_debug("pid %d: %s: " fmt "\n", \ - current->pid, __func__, ##__VA_ARGS__) - -#define AUTOFS_WARN(fmt, ...) \ - printk(KERN_WARNING "pid %d: %s: " fmt "\n", \ - current->pid, __func__, ##__VA_ARGS__) - -#define AUTOFS_ERROR(fmt, ...) \ - printk(KERN_ERR "pid %d: %s: " fmt "\n", \ - current->pid, __func__, ##__VA_ARGS__) - -/* Unified info structure. This is pointed to by both the dentry and - inode structures. Each file in the filesystem has an instance of this - structure. It holds a reference to the dentry, so dentries are never - flushed while the file exists. All name lookups are dealt with at the - dentry level, although the filesystem can interfere in the validation - process. Readdir is implemented by traversing the dentry lists. */ +#ifdef pr_fmt +#undef pr_fmt +#endif +#define pr_fmt(fmt) KBUILD_MODNAME ":pid:%d:%s: " fmt, current->pid, __func__ + +/* + * Unified info structure. This is pointed to by both the dentry and + * inode structures. Each file in the filesystem has an instance of this + * structure. It holds a reference to the dentry, so dentries are never + * flushed while the file exists. All name lookups are dealt with at the + * dentry level, although the filesystem can interfere in the validation + * process. Readdir is implemented by traversing the dentry lists. + */ struct autofs_info { struct dentry *dentry; struct inode *inode; @@ -78,7 +69,7 @@ struct autofs_info { kgid_t gid; }; -#define AUTOFS_INF_EXPIRING (1<<0) /* dentry is in the process of expiring */ +#define AUTOFS_INF_EXPIRING (1<<0) /* dentry in the process of expiring */ #define AUTOFS_INF_NO_RCU (1<<1) /* the dentry is being considered * for expiry, so RCU_walk is * not permitted @@ -140,10 +131,11 @@ static inline struct autofs_info *autofs4_dentry_ino(struct dentry *dentry) } /* autofs4_oz_mode(): do we see the man behind the curtain? (The - processes which do manipulations for us in user space sees the raw - filesystem without "magic".) */ - -static inline int autofs4_oz_mode(struct autofs_sb_info *sbi) { + * processes which do manipulations for us in user space sees the raw + * filesystem without "magic".) + */ +static inline int autofs4_oz_mode(struct autofs_sb_info *sbi) +{ return sbi->catatonic || task_pgrp(current) == sbi->oz_pgrp; } @@ -154,12 +146,12 @@ void autofs4_free_ino(struct autofs_info *); int is_autofs4_dentry(struct dentry *); int autofs4_expire_wait(struct dentry *dentry, int rcu_walk); int autofs4_expire_run(struct super_block *, struct vfsmount *, - struct autofs_sb_info *, - struct autofs_packet_expire __user *); + struct autofs_sb_info *, + struct autofs_packet_expire __user *); int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt, struct autofs_sb_info *sbi, int when); int autofs4_expire_multi(struct super_block *, struct vfsmount *, - struct autofs_sb_info *, int __user *); + struct autofs_sb_info *, int __user *); struct dentry *autofs4_expire_direct(struct super_block *sb, struct vfsmount *mnt, struct autofs_sb_info *sbi, int how); @@ -224,8 +216,8 @@ static inline int autofs_prepare_pipe(struct file *pipe) /* Queue management functions */ -int autofs4_wait(struct autofs_sb_info *,struct dentry *, enum autofs_notify); -int autofs4_wait_release(struct autofs_sb_info *,autofs_wqt_t,int); +int autofs4_wait(struct autofs_sb_info *, struct dentry *, enum autofs_notify); +int autofs4_wait_release(struct autofs_sb_info *, autofs_wqt_t, int); void autofs4_catatonic_mode(struct autofs_sb_info *); static inline u32 autofs4_get_dev(struct autofs_sb_info *sbi) @@ -242,37 +234,37 @@ static inline void __autofs4_add_expiring(struct dentry *dentry) { struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); struct autofs_info *ino = autofs4_dentry_ino(dentry); + if (ino) { if (list_empty(&ino->expiring)) list_add(&ino->expiring, &sbi->expiring_list); } - return; } static inline void autofs4_add_expiring(struct dentry *dentry) { struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); struct autofs_info *ino = autofs4_dentry_ino(dentry); + if (ino) { spin_lock(&sbi->lookup_lock); if (list_empty(&ino->expiring)) list_add(&ino->expiring, &sbi->expiring_list); spin_unlock(&sbi->lookup_lock); } - return; } static inline void autofs4_del_expiring(struct dentry *dentry) { struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); struct autofs_info *ino = autofs4_dentry_ino(dentry); + if (ino) { spin_lock(&sbi->lookup_lock); if (!list_empty(&ino->expiring)) list_del_init(&ino->expiring); spin_unlock(&sbi->lookup_lock); } - return; } extern void autofs4_kill_sb(struct super_block *); diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c index ac7d921..c7fcc74 100644 --- a/fs/autofs4/dev-ioctl.c +++ b/fs/autofs4/dev-ioctl.c @@ -72,13 +72,13 @@ static int check_dev_ioctl_version(int cmd, struct autofs_dev_ioctl *param) { int err = 0; - if ((AUTOFS_DEV_IOCTL_VERSION_MAJOR != param->ver_major) || - (AUTOFS_DEV_IOCTL_VERSION_MINOR < param->ver_minor)) { - AUTOFS_WARN("ioctl control interface version mismatch: " - "kernel(%u.%u), user(%u.%u), cmd(%d)", - AUTOFS_DEV_IOCTL_VERSION_MAJOR, - AUTOFS_DEV_IOCTL_VERSION_MINOR, - param->ver_major, param->ver_minor, cmd); + if ((param->ver_major != AUTOFS_DEV_IOCTL_VERSION_MAJOR) || + (param->ver_minor > AUTOFS_DEV_IOCTL_VERSION_MINOR)) { + pr_warn("ioctl control interface version mismatch: " + "kernel(%u.%u), user(%u.%u), cmd(%d)\n", + AUTOFS_DEV_IOCTL_VERSION_MAJOR, + AUTOFS_DEV_IOCTL_VERSION_MINOR, + param->ver_major, param->ver_minor, cmd); err = -EINVAL; } @@ -93,7 +93,8 @@ static int check_dev_ioctl_version(int cmd, struct autofs_dev_ioctl *param) * Copy parameter control struct, including a possible path allocated * at the end of the struct. */ -static struct autofs_dev_ioctl *copy_dev_ioctl(struct autofs_dev_ioctl __user *in) +static struct autofs_dev_ioctl * + copy_dev_ioctl(struct autofs_dev_ioctl __user *in) { struct autofs_dev_ioctl tmp, *res; @@ -116,7 +117,6 @@ static struct autofs_dev_ioctl *copy_dev_ioctl(struct autofs_dev_ioctl __user *i static inline void free_dev_ioctl(struct autofs_dev_ioctl *param) { kfree(param); - return; } /* @@ -129,24 +129,24 @@ static int validate_dev_ioctl(int cmd, struct autofs_dev_ioctl *param) err = check_dev_ioctl_version(cmd, param); if (err) { - AUTOFS_WARN("invalid device control module version " - "supplied for cmd(0x%08x)", cmd); + pr_warn("invalid device control module version " + "supplied for cmd(0x%08x)\n", cmd); goto out; } if (param->size > sizeof(*param)) { err = invalid_str(param->path, param->size - sizeof(*param)); if (err) { - AUTOFS_WARN( - "path string terminator missing for cmd(0x%08x)", + pr_warn( + "path string terminator missing for cmd(0x%08x)\n", cmd); goto out; } err = check_name(param->path); if (err) { - AUTOFS_WARN("invalid path supplied for cmd(0x%08x)", - cmd); + pr_warn("invalid path supplied for cmd(0x%08x)\n", + cmd); goto out; } } @@ -197,7 +197,9 @@ static int find_autofs_mount(const char *pathname, void *data) { struct path path; - int err = kern_path_mountpoint(AT_FDCWD, pathname, &path, 0); + int err; + + err = kern_path_mountpoint(AT_FDCWD, pathname, &path, 0); if (err) return err; err = -ENOENT; @@ -225,6 +227,7 @@ static int test_by_dev(struct path *path, void *p) static int test_by_type(struct path *path, void *p) { struct autofs_info *ino = autofs4_dentry_ino(path->dentry); + return ino && ino->sbi->type & *(unsigned *)p; } @@ -370,7 +373,7 @@ static int autofs_dev_ioctl_setpipefd(struct file *fp, new_pid = get_task_pid(current, PIDTYPE_PGID); if (ns_of_pid(new_pid) != ns_of_pid(sbi->oz_pgrp)) { - AUTOFS_WARN("Not allowed to change PID namespace"); + pr_warn("not allowed to change PID namespace\n"); err = -EINVAL; goto out; } @@ -456,8 +459,10 @@ static int autofs_dev_ioctl_requester(struct file *fp, err = 0; autofs4_expire_wait(path.dentry, 0); spin_lock(&sbi->fs_lock); - param->requester.uid = from_kuid_munged(current_user_ns(), ino->uid); - param->requester.gid = from_kgid_munged(current_user_ns(), ino->gid); + param->requester.uid = + from_kuid_munged(current_user_ns(), ino->uid); + param->requester.gid = + from_kgid_munged(current_user_ns(), ino->gid); spin_unlock(&sbi->fs_lock); } path_put(&path); @@ -619,7 +624,8 @@ static ioctl_fn lookup_dev_ioctl(unsigned int cmd) } /* ioctl dispatcher */ -static int _autofs_dev_ioctl(unsigned int command, struct autofs_dev_ioctl __user *user) +static int _autofs_dev_ioctl(unsigned int command, + struct autofs_dev_ioctl __user *user) { struct autofs_dev_ioctl *param; struct file *fp; @@ -655,7 +661,7 @@ static int _autofs_dev_ioctl(unsigned int command, struct autofs_dev_ioctl __use fn = lookup_dev_ioctl(cmd); if (!fn) { - AUTOFS_WARN("unknown command 0x%08x", command); + pr_warn("unknown command 0x%08x\n", command); return -ENOTTY; } @@ -711,6 +717,7 @@ out: static long autofs_dev_ioctl(struct file *file, uint command, ulong u) { int err; + err = _autofs_dev_ioctl(command, (struct autofs_dev_ioctl __user *) u); return (long) err; } @@ -733,8 +740,8 @@ static const struct file_operations _dev_ioctl_fops = { static struct miscdevice _autofs_dev_ioctl_misc = { .minor = AUTOFS_MINOR, - .name = AUTOFS_DEVICE_NAME, - .fops = &_dev_ioctl_fops + .name = AUTOFS_DEVICE_NAME, + .fops = &_dev_ioctl_fops }; MODULE_ALIAS_MISCDEV(AUTOFS_MINOR); @@ -747,7 +754,7 @@ int __init autofs_dev_ioctl_init(void) r = misc_register(&_autofs_dev_ioctl_misc); if (r) { - AUTOFS_ERROR("misc_register failed for control device"); + pr_err("misc_register failed for control device\n"); return r; } @@ -757,6 +764,4 @@ int __init autofs_dev_ioctl_init(void) void autofs_dev_ioctl_exit(void) { misc_deregister(&_autofs_dev_ioctl_misc); - return; } - diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c index 1cebc3c..9510d8d 100644 --- a/fs/autofs4/expire.c +++ b/fs/autofs4/expire.c @@ -1,16 +1,12 @@ -/* -*- c -*- --------------------------------------------------------------- * - * - * linux/fs/autofs/expire.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org> - * Copyright 2001-2006 Ian Kent <raven@themaw.net> +/* + * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved + * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org> + * Copyright 2001-2006 Ian Kent <raven@themaw.net> * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ + */ #include "autofs_i.h" @@ -18,7 +14,7 @@ static unsigned long now; /* Check if a dentry can be expired */ static inline int autofs4_can_expire(struct dentry *dentry, - unsigned long timeout, int do_now) + unsigned long timeout, int do_now) { struct autofs_info *ino = autofs4_dentry_ino(dentry); @@ -41,7 +37,7 @@ static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry) struct path path = {.mnt = mnt, .dentry = dentry}; int status = 1; - DPRINTK("dentry %p %pd", dentry, dentry); + pr_debug("dentry %p %pd\n", dentry, dentry); path_get(&path); @@ -58,14 +54,16 @@ static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry) /* Update the expiry counter if fs is busy */ if (!may_umount_tree(path.mnt)) { - struct autofs_info *ino = autofs4_dentry_ino(top); + struct autofs_info *ino; + + ino = autofs4_dentry_ino(top); ino->last_used = jiffies; goto done; } status = 0; done: - DPRINTK("returning = %d", status); + pr_debug("returning = %d\n", status); path_put(&path); return status; } @@ -74,7 +72,7 @@ done: * Calculate and dget next entry in the subdirs list under root. */ static struct dentry *get_next_positive_subdir(struct dentry *prev, - struct dentry *root) + struct dentry *root) { struct autofs_sb_info *sbi = autofs4_sbi(root->d_sb); struct list_head *next; @@ -121,7 +119,7 @@ cont: * Calculate and dget next entry in top down tree traversal. */ static struct dentry *get_next_positive_dentry(struct dentry *prev, - struct dentry *root) + struct dentry *root) { struct autofs_sb_info *sbi = autofs4_sbi(root->d_sb); struct list_head *next; @@ -187,15 +185,17 @@ again: * autofs submounts. */ static int autofs4_direct_busy(struct vfsmount *mnt, - struct dentry *top, - unsigned long timeout, - int do_now) + struct dentry *top, + unsigned long timeout, + int do_now) { - DPRINTK("top %p %pd", top, top); + pr_debug("top %p %pd\n", top, top); /* If it's busy update the expiry counters */ if (!may_umount_tree(mnt)) { - struct autofs_info *ino = autofs4_dentry_ino(top); + struct autofs_info *ino; + + ino = autofs4_dentry_ino(top); if (ino) ino->last_used = jiffies; return 1; @@ -208,7 +208,8 @@ static int autofs4_direct_busy(struct vfsmount *mnt, return 0; } -/* Check a directory tree of mount points for busyness +/* + * Check a directory tree of mount points for busyness * The tree is not busy iff no mountpoints are busy */ static int autofs4_tree_busy(struct vfsmount *mnt, @@ -219,7 +220,7 @@ static int autofs4_tree_busy(struct vfsmount *mnt, struct autofs_info *top_ino = autofs4_dentry_ino(top); struct dentry *p; - DPRINTK("top %p %pd", top, top); + pr_debug("top %p %pd\n", top, top); /* Negative dentry - give up */ if (!simple_positive(top)) @@ -227,7 +228,7 @@ static int autofs4_tree_busy(struct vfsmount *mnt, p = NULL; while ((p = get_next_positive_dentry(p, top))) { - DPRINTK("dentry %p %pd", p, p); + pr_debug("dentry %p %pd\n", p, p); /* * Is someone visiting anywhere in the subtree ? @@ -273,11 +274,11 @@ static struct dentry *autofs4_check_leaves(struct vfsmount *mnt, { struct dentry *p; - DPRINTK("parent %p %pd", parent, parent); + pr_debug("parent %p %pd\n", parent, parent); p = NULL; while ((p = get_next_positive_dentry(p, parent))) { - DPRINTK("dentry %p %pd", p, p); + pr_debug("dentry %p %pd\n", p, p); if (d_mountpoint(p)) { /* Can we umount this guy */ @@ -362,7 +363,7 @@ static struct dentry *should_expire(struct dentry *dentry, * offset (autofs-5.0+). */ if (d_mountpoint(dentry)) { - DPRINTK("checking mountpoint %p %pd", dentry, dentry); + pr_debug("checking mountpoint %p %pd\n", dentry, dentry); /* Can we umount this guy */ if (autofs4_mount_busy(mnt, dentry)) @@ -375,7 +376,7 @@ static struct dentry *should_expire(struct dentry *dentry, } if (d_really_is_positive(dentry) && d_is_symlink(dentry)) { - DPRINTK("checking symlink %p %pd", dentry, dentry); + pr_debug("checking symlink %p %pd\n", dentry, dentry); /* * A symlink can't be "busy" in the usual sense so * just check last used for expire timeout. @@ -404,6 +405,7 @@ static struct dentry *should_expire(struct dentry *dentry, } else { /* Path walk currently on this dentry? */ struct dentry *expired; + ino_count = atomic_read(&ino->count) + 1; if (d_count(dentry) > ino_count) return NULL; @@ -471,7 +473,7 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb, return NULL; found: - DPRINTK("returning %p %pd", expired, expired); + pr_debug("returning %p %pd\n", expired, expired); ino->flags |= AUTOFS_INF_EXPIRING; smp_mb(); ino->flags &= ~AUTOFS_INF_NO_RCU; @@ -503,12 +505,12 @@ int autofs4_expire_wait(struct dentry *dentry, int rcu_walk) if (ino->flags & AUTOFS_INF_EXPIRING) { spin_unlock(&sbi->fs_lock); - DPRINTK("waiting for expire %p name=%pd", dentry, dentry); + pr_debug("waiting for expire %p name=%pd\n", dentry, dentry); status = autofs4_wait(sbi, dentry, NFY_NONE); wait_for_completion(&ino->expire_complete); - DPRINTK("expire done status=%d", status); + pr_debug("expire done status=%d\n", status); if (d_unhashed(dentry)) return -EAGAIN; @@ -522,21 +524,22 @@ int autofs4_expire_wait(struct dentry *dentry, int rcu_walk) /* Perform an expiry operation */ int autofs4_expire_run(struct super_block *sb, - struct vfsmount *mnt, - struct autofs_sb_info *sbi, - struct autofs_packet_expire __user *pkt_p) + struct vfsmount *mnt, + struct autofs_sb_info *sbi, + struct autofs_packet_expire __user *pkt_p) { struct autofs_packet_expire pkt; struct autofs_info *ino; struct dentry *dentry; int ret = 0; - memset(&pkt,0,sizeof pkt); + memset(&pkt, 0, sizeof(pkt)); pkt.hdr.proto_version = sbi->version; pkt.hdr.type = autofs_ptype_expire; - if ((dentry = autofs4_expire_indirect(sb, mnt, sbi, 0)) == NULL) + dentry = autofs4_expire_indirect(sb, mnt, sbi, 0); + if (!dentry) return -EAGAIN; pkt.len = dentry->d_name.len; @@ -544,7 +547,7 @@ int autofs4_expire_run(struct super_block *sb, pkt.name[pkt.len] = '\0'; dput(dentry); - if ( copy_to_user(pkt_p, &pkt, sizeof(struct autofs_packet_expire)) ) + if (copy_to_user(pkt_p, &pkt, sizeof(struct autofs_packet_expire))) ret = -EFAULT; spin_lock(&sbi->fs_lock); @@ -573,7 +576,8 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt, struct autofs_info *ino = autofs4_dentry_ino(dentry); /* This is synchronous because it makes the daemon a - little easier */ + * little easier + */ ret = autofs4_wait(sbi, dentry, NFY_EXPIRE); spin_lock(&sbi->fs_lock); @@ -588,8 +592,10 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt, return ret; } -/* Call repeatedly until it returns -EAGAIN, meaning there's nothing - more to be done */ +/* + * Call repeatedly until it returns -EAGAIN, meaning there's nothing + * more to be done. + */ int autofs4_expire_multi(struct super_block *sb, struct vfsmount *mnt, struct autofs_sb_info *sbi, int __user *arg) { diff --git a/fs/autofs4/init.c b/fs/autofs4/init.c index b3db517..8cf0e63 100644 --- a/fs/autofs4/init.c +++ b/fs/autofs4/init.c @@ -1,14 +1,10 @@ -/* -*- c -*- --------------------------------------------------------------- * - * - * linux/fs/autofs/init.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved +/* + * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ + */ #include <linux/module.h> #include <linux/init.h> diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c index a3ae0b2..61b2105 100644 --- a/fs/autofs4/inode.c +++ b/fs/autofs4/inode.c @@ -1,15 +1,11 @@ -/* -*- c -*- --------------------------------------------------------------- * - * - * linux/fs/autofs/inode.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * Copyright 2005-2006 Ian Kent <raven@themaw.net> +/* + * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved + * Copyright 2005-2006 Ian Kent <raven@themaw.net> * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ + */ #include <linux/kernel.h> #include <linux/slab.h> @@ -24,7 +20,9 @@ struct autofs_info *autofs4_new_ino(struct autofs_sb_info *sbi) { - struct autofs_info *ino = kzalloc(sizeof(*ino), GFP_KERNEL); + struct autofs_info *ino; + + ino = kzalloc(sizeof(*ino), GFP_KERNEL); if (ino) { INIT_LIST_HEAD(&ino->active); INIT_LIST_HEAD(&ino->expiring); @@ -62,7 +60,7 @@ void autofs4_kill_sb(struct super_block *sb) put_pid(sbi->oz_pgrp); } - DPRINTK("shutting down"); + pr_debug("shutting down\n"); kill_litter_super(sb); if (sbi) kfree_rcu(sbi, rcu); @@ -94,7 +92,12 @@ static int autofs4_show_options(struct seq_file *m, struct dentry *root) seq_printf(m, ",direct"); else seq_printf(m, ",indirect"); - +#ifdef CONFIG_CHECKPOINT_RESTORE + if (sbi->pipe) + seq_printf(m, ",pipe_ino=%ld", sbi->pipe->f_inode->i_ino); + else + seq_printf(m, ",pipe_ino=-1"); +#endif return 0; } @@ -147,6 +150,7 @@ static int parse_options(char *options, int *pipefd, kuid_t *uid, kgid_t *gid, while ((p = strsep(&options, ",")) != NULL) { int token; + if (!*p) continue; @@ -204,9 +208,9 @@ static int parse_options(char *options, int *pipefd, kuid_t *uid, kgid_t *gid, int autofs4_fill_super(struct super_block *s, void *data, int silent) { - struct inode * root_inode; - struct dentry * root; - struct file * pipe; + struct inode *root_inode; + struct dentry *root; + struct file *pipe; int pipefd; struct autofs_sb_info *sbi; struct autofs_info *ino; @@ -217,7 +221,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent) sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); if (!sbi) return -ENOMEM; - DPRINTK("starting up, sbi = %p",sbi); + pr_debug("starting up, sbi = %p\n", sbi); s->s_fs_info = sbi; sbi->magic = AUTOFS_SBI_MAGIC; @@ -266,14 +270,14 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent) if (parse_options(data, &pipefd, &root_inode->i_uid, &root_inode->i_gid, &pgrp, &pgrp_set, &sbi->type, &sbi->min_proto, &sbi->max_proto)) { - printk("autofs: called with bogus options\n"); + pr_err("called with bogus options\n"); goto fail_dput; } if (pgrp_set) { sbi->oz_pgrp = find_get_pid(pgrp); if (!sbi->oz_pgrp) { - pr_warn("autofs: could not find process group %d\n", + pr_err("could not find process group %d\n", pgrp); goto fail_dput; } @@ -290,10 +294,10 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent) /* Couldn't this be tested earlier? */ if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION || sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) { - printk("autofs: kernel does not match daemon version " + pr_err("kernel does not match daemon version " "daemon (%d, %d) kernel (%d, %d)\n", - sbi->min_proto, sbi->max_proto, - AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION); + sbi->min_proto, sbi->max_proto, + AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION); goto fail_dput; } @@ -304,11 +308,11 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent) sbi->version = sbi->max_proto; sbi->sub_version = AUTOFS_PROTO_SUBVERSION; - DPRINTK("pipe fd = %d, pgrp = %u", pipefd, pid_nr(sbi->oz_pgrp)); + pr_debug("pipe fd = %d, pgrp = %u\n", pipefd, pid_nr(sbi->oz_pgrp)); pipe = fget(pipefd); if (!pipe) { - printk("autofs: could not open pipe file descriptor\n"); + pr_err("could not open pipe file descriptor\n"); goto fail_dput; } ret = autofs_prepare_pipe(pipe); @@ -323,12 +327,12 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent) */ s->s_root = root; return 0; - + /* * Failure ... clean up. */ fail_fput: - printk("autofs: pipe file descriptor does not contain proper ops\n"); + pr_err("pipe file descriptor does not contain proper ops\n"); fput(pipe); /* fall through */ fail_dput: diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c index 75dd739..7ab9239 100644 --- a/fs/autofs4/root.c +++ b/fs/autofs4/root.c @@ -1,16 +1,12 @@ -/* -*- c -*- --------------------------------------------------------------- * - * - * linux/fs/autofs/root.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org> - * Copyright 2001-2006 Ian Kent <raven@themaw.net> +/* + * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved + * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org> + * Copyright 2001-2006 Ian Kent <raven@themaw.net> * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ + */ #include <linux/capability.h> #include <linux/errno.h> @@ -23,16 +19,18 @@ #include "autofs_i.h" -static int autofs4_dir_symlink(struct inode *,struct dentry *,const char *); -static int autofs4_dir_unlink(struct inode *,struct dentry *); -static int autofs4_dir_rmdir(struct inode *,struct dentry *); -static int autofs4_dir_mkdir(struct inode *,struct dentry *,umode_t); -static long autofs4_root_ioctl(struct file *,unsigned int,unsigned long); +static int autofs4_dir_symlink(struct inode *, struct dentry *, const char *); +static int autofs4_dir_unlink(struct inode *, struct dentry *); +static int autofs4_dir_rmdir(struct inode *, struct dentry *); +static int autofs4_dir_mkdir(struct inode *, struct dentry *, umode_t); +static long autofs4_root_ioctl(struct file *, unsigned int, unsigned long); #ifdef CONFIG_COMPAT -static long autofs4_root_compat_ioctl(struct file *,unsigned int,unsigned long); +static long autofs4_root_compat_ioctl(struct file *, + unsigned int, unsigned long); #endif static int autofs4_dir_open(struct inode *inode, struct file *file); -static struct dentry *autofs4_lookup(struct inode *,struct dentry *, unsigned int); +static struct dentry *autofs4_lookup(struct inode *, + struct dentry *, unsigned int); static struct vfsmount *autofs4_d_automount(struct path *); static int autofs4_d_manage(struct dentry *, bool); static void autofs4_dentry_release(struct dentry *); @@ -74,7 +72,9 @@ const struct dentry_operations autofs4_dentry_operations = { static void autofs4_add_active(struct dentry *dentry) { struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); - struct autofs_info *ino = autofs4_dentry_ino(dentry); + struct autofs_info *ino; + + ino = autofs4_dentry_ino(dentry); if (ino) { spin_lock(&sbi->lookup_lock); if (!ino->active_count) { @@ -84,13 +84,14 @@ static void autofs4_add_active(struct dentry *dentry) ino->active_count++; spin_unlock(&sbi->lookup_lock); } - return; } static void autofs4_del_active(struct dentry *dentry) { struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); - struct autofs_info *ino = autofs4_dentry_ino(dentry); + struct autofs_info *ino; + + ino = autofs4_dentry_ino(dentry); if (ino) { spin_lock(&sbi->lookup_lock); ino->active_count--; @@ -100,7 +101,6 @@ static void autofs4_del_active(struct dentry *dentry) } spin_unlock(&sbi->lookup_lock); } - return; } static int autofs4_dir_open(struct inode *inode, struct file *file) @@ -108,7 +108,7 @@ static int autofs4_dir_open(struct inode *inode, struct file *file) struct dentry *dentry = file->f_path.dentry; struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); - DPRINTK("file=%p dentry=%p %pd", file, dentry, dentry); + pr_debug("file=%p dentry=%p %pd\n", file, dentry, dentry); if (autofs4_oz_mode(sbi)) goto out; @@ -138,7 +138,7 @@ static void autofs4_dentry_release(struct dentry *de) struct autofs_info *ino = autofs4_dentry_ino(de); struct autofs_sb_info *sbi = autofs4_sbi(de->d_sb); - DPRINTK("releasing %p", de); + pr_debug("releasing %p\n", de); if (!ino) return; @@ -278,9 +278,9 @@ static int autofs4_mount_wait(struct dentry *dentry, bool rcu_walk) if (ino->flags & AUTOFS_INF_PENDING) { if (rcu_walk) return -ECHILD; - DPRINTK("waiting for mount name=%pd", dentry); + pr_debug("waiting for mount name=%pd\n", dentry); status = autofs4_wait(sbi, dentry, NFY_MOUNT); - DPRINTK("mount wait done status=%d", status); + pr_debug("mount wait done status=%d\n", status); } ino->last_used = jiffies; return status; @@ -320,7 +320,9 @@ static struct dentry *autofs4_mountpoint_changed(struct path *path) if (autofs_type_indirect(sbi->type) && d_unhashed(dentry)) { struct dentry *parent = dentry->d_parent; struct autofs_info *ino; - struct dentry *new = d_lookup(parent, &dentry->d_name); + struct dentry *new; + + new = d_lookup(parent, &dentry->d_name); if (!new) return NULL; ino = autofs4_dentry_ino(new); @@ -338,7 +340,7 @@ static struct vfsmount *autofs4_d_automount(struct path *path) struct autofs_info *ino = autofs4_dentry_ino(dentry); int status; - DPRINTK("dentry=%p %pd", dentry, dentry); + pr_debug("dentry=%p %pd\n", dentry, dentry); /* The daemon never triggers a mount. */ if (autofs4_oz_mode(sbi)) @@ -425,7 +427,7 @@ static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk) struct autofs_info *ino = autofs4_dentry_ino(dentry); int status; - DPRINTK("dentry=%p %pd", dentry, dentry); + pr_debug("dentry=%p %pd\n", dentry, dentry); /* The daemon never waits. */ if (autofs4_oz_mode(sbi)) { @@ -455,6 +457,7 @@ static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk) * a mount-trap. */ struct inode *inode; + if (ino->flags & (AUTOFS_INF_EXPIRING | AUTOFS_INF_NO_RCU)) return 0; if (d_mountpoint(dentry)) @@ -494,13 +497,14 @@ static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk) } /* Lookups in the root directory */ -static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) +static struct dentry *autofs4_lookup(struct inode *dir, + struct dentry *dentry, unsigned int flags) { struct autofs_sb_info *sbi; struct autofs_info *ino; struct dentry *active; - DPRINTK("name = %pd", dentry); + pr_debug("name = %pd\n", dentry); /* File name too long to exist */ if (dentry->d_name.len > NAME_MAX) @@ -508,14 +512,14 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, u sbi = autofs4_sbi(dir->i_sb); - DPRINTK("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d", - current->pid, task_pgrp_nr(current), sbi->catatonic, - autofs4_oz_mode(sbi)); + pr_debug("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d\n", + current->pid, task_pgrp_nr(current), sbi->catatonic, + autofs4_oz_mode(sbi)); active = autofs4_lookup_active(dentry); - if (active) { + if (active) return active; - } else { + else { /* * A dentry that is not within the root can never trigger a * mount operation, unless the directory already exists, so we @@ -526,7 +530,8 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, u return ERR_PTR(-ENOENT); /* Mark entries in the root as mount triggers */ - if (autofs_type_indirect(sbi->type) && IS_ROOT(dentry->d_parent)) + if (IS_ROOT(dentry->d_parent) && + autofs_type_indirect(sbi->type)) __managed_dentry_set_managed(dentry); ino = autofs4_new_ino(sbi); @@ -552,7 +557,7 @@ static int autofs4_dir_symlink(struct inode *dir, size_t size = strlen(symname); char *cp; - DPRINTK("%s <- %pd", symname, dentry); + pr_debug("%s <- %pd\n", symname, dentry); if (!autofs4_oz_mode(sbi)) return -EACCES; @@ -611,7 +616,7 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry) struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb); struct autofs_info *ino = autofs4_dentry_ino(dentry); struct autofs_info *p_ino; - + /* This allows root to remove symlinks */ if (!autofs4_oz_mode(sbi) && !capable(CAP_SYS_ADMIN)) return -EPERM; @@ -662,7 +667,6 @@ static void autofs_set_leaf_automount_flags(struct dentry *dentry) if (IS_ROOT(parent->d_parent)) return; managed_dentry_clear_managed(parent); - return; } static void autofs_clear_leaf_automount_flags(struct dentry *dentry) @@ -685,7 +689,6 @@ static void autofs_clear_leaf_automount_flags(struct dentry *dentry) if (d_child->next == &parent->d_subdirs && d_child->prev == &parent->d_subdirs) managed_dentry_set_managed(parent); - return; } static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry) @@ -693,8 +696,8 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry) struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb); struct autofs_info *ino = autofs4_dentry_ino(dentry); struct autofs_info *p_ino; - - DPRINTK("dentry %p, removing %pd", dentry, dentry); + + pr_debug("dentry %p, removing %pd\n", dentry, dentry); if (!autofs4_oz_mode(sbi)) return -EACCES; @@ -726,7 +729,8 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry) return 0; } -static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) +static int autofs4_dir_mkdir(struct inode *dir, + struct dentry *dentry, umode_t mode) { struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb); struct autofs_info *ino = autofs4_dentry_ino(dentry); @@ -736,7 +740,7 @@ static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, umode_t m if (!autofs4_oz_mode(sbi)) return -EACCES; - DPRINTK("dentry %p, creating %pd", dentry, dentry); + pr_debug("dentry %p, creating %pd\n", dentry, dentry); BUG_ON(!ino); @@ -766,14 +770,18 @@ static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, umode_t m /* Get/set timeout ioctl() operation */ #ifdef CONFIG_COMPAT static inline int autofs4_compat_get_set_timeout(struct autofs_sb_info *sbi, - compat_ulong_t __user *p) + compat_ulong_t __user *p) { - int rv; unsigned long ntimeout; + int rv; - if ((rv = get_user(ntimeout, p)) || - (rv = put_user(sbi->exp_timeout/HZ, p))) - return rv; + rv = get_user(ntimeout, p); + if (rv) + goto error; + + rv = put_user(sbi->exp_timeout/HZ, p); + if (rv) + goto error; if (ntimeout > UINT_MAX/HZ) sbi->exp_timeout = 0; @@ -781,18 +789,24 @@ static inline int autofs4_compat_get_set_timeout(struct autofs_sb_info *sbi, sbi->exp_timeout = ntimeout * HZ; return 0; +error: + return rv; } #endif static inline int autofs4_get_set_timeout(struct autofs_sb_info *sbi, - unsigned long __user *p) + unsigned long __user *p) { - int rv; unsigned long ntimeout; + int rv; - if ((rv = get_user(ntimeout, p)) || - (rv = put_user(sbi->exp_timeout/HZ, p))) - return rv; + rv = get_user(ntimeout, p); + if (rv) + goto error; + + rv = put_user(sbi->exp_timeout/HZ, p); + if (rv) + goto error; if (ntimeout > ULONG_MAX/HZ) sbi->exp_timeout = 0; @@ -800,16 +814,20 @@ static inline int autofs4_get_set_timeout(struct autofs_sb_info *sbi, sbi->exp_timeout = ntimeout * HZ; return 0; +error: + return rv; } /* Return protocol version */ -static inline int autofs4_get_protover(struct autofs_sb_info *sbi, int __user *p) +static inline int autofs4_get_protover(struct autofs_sb_info *sbi, + int __user *p) { return put_user(sbi->version, p); } /* Return protocol sub version */ -static inline int autofs4_get_protosubver(struct autofs_sb_info *sbi, int __user *p) +static inline int autofs4_get_protosubver(struct autofs_sb_info *sbi, + int __user *p) { return put_user(sbi->sub_version, p); } @@ -824,7 +842,7 @@ static inline int autofs4_ask_umount(struct vfsmount *mnt, int __user *p) if (may_umount(mnt)) status = 1; - DPRINTK("returning %d", status); + pr_debug("returning %d\n", status); status = put_user(status, p); @@ -832,9 +850,9 @@ static inline int autofs4_ask_umount(struct vfsmount *mnt, int __user *p) } /* Identify autofs4_dentries - this is so we can tell if there's - an extra dentry refcount or not. We only hold a refcount on the - dentry if its non-negative (ie, d_inode != NULL) -*/ + * an extra dentry refcount or not. We only hold a refcount on the + * dentry if its non-negative (ie, d_inode != NULL) + */ int is_autofs4_dentry(struct dentry *dentry) { return dentry && d_really_is_positive(dentry) && @@ -852,21 +870,21 @@ static int autofs4_root_ioctl_unlocked(struct inode *inode, struct file *filp, struct autofs_sb_info *sbi = autofs4_sbi(inode->i_sb); void __user *p = (void __user *)arg; - DPRINTK("cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u", - cmd,arg,sbi,task_pgrp_nr(current)); + pr_debug("cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u\n", + cmd, arg, sbi, task_pgrp_nr(current)); if (_IOC_TYPE(cmd) != _IOC_TYPE(AUTOFS_IOC_FIRST) || _IOC_NR(cmd) - _IOC_NR(AUTOFS_IOC_FIRST) >= AUTOFS_IOC_COUNT) return -ENOTTY; - + if (!autofs4_oz_mode(sbi) && !capable(CAP_SYS_ADMIN)) return -EPERM; - - switch(cmd) { + + switch (cmd) { case AUTOFS_IOC_READY: /* Wait queue: go ahead and retry */ - return autofs4_wait_release(sbi,(autofs_wqt_t)arg,0); + return autofs4_wait_release(sbi, (autofs_wqt_t) arg, 0); case AUTOFS_IOC_FAIL: /* Wait queue: fail with ENOENT */ - return autofs4_wait_release(sbi,(autofs_wqt_t)arg,-ENOENT); + return autofs4_wait_release(sbi, (autofs_wqt_t) arg, -ENOENT); case AUTOFS_IOC_CATATONIC: /* Enter catatonic mode (daemon shutdown) */ autofs4_catatonic_mode(sbi); return 0; @@ -886,13 +904,15 @@ static int autofs4_root_ioctl_unlocked(struct inode *inode, struct file *filp, /* return a single thing to expire */ case AUTOFS_IOC_EXPIRE: - return autofs4_expire_run(inode->i_sb,filp->f_path.mnt,sbi, p); + return autofs4_expire_run(inode->i_sb, + filp->f_path.mnt, sbi, p); /* same as above, but can send multiple expires through pipe */ case AUTOFS_IOC_EXPIRE_MULTI: - return autofs4_expire_multi(inode->i_sb,filp->f_path.mnt,sbi, p); + return autofs4_expire_multi(inode->i_sb, + filp->f_path.mnt, sbi, p); default: - return -ENOSYS; + return -EINVAL; } } @@ -900,12 +920,13 @@ static long autofs4_root_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct inode *inode = file_inode(filp); + return autofs4_root_ioctl_unlocked(inode, filp, cmd, arg); } #ifdef CONFIG_COMPAT static long autofs4_root_compat_ioctl(struct file *filp, - unsigned int cmd, unsigned long arg) + unsigned int cmd, unsigned long arg) { struct inode *inode = file_inode(filp); int ret; @@ -914,7 +935,7 @@ static long autofs4_root_compat_ioctl(struct file *filp, ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, arg); else ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, - (unsigned long)compat_ptr(arg)); + (unsigned long) compat_ptr(arg)); return ret; } diff --git a/fs/autofs4/symlink.c b/fs/autofs4/symlink.c index 84e037d..99aab00 100644 --- a/fs/autofs4/symlink.c +++ b/fs/autofs4/symlink.c @@ -1,14 +1,10 @@ -/* -*- c -*- --------------------------------------------------------------- * - * - * linux/fs/autofs/symlink.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved +/* + * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ + */ #include "autofs_i.h" @@ -18,6 +14,7 @@ static const char *autofs4_get_link(struct dentry *dentry, { struct autofs_sb_info *sbi; struct autofs_info *ino; + if (!dentry) return ERR_PTR(-ECHILD); sbi = autofs4_sbi(dentry->d_sb); diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c index 35b755e..0146d91 100644 --- a/fs/autofs4/waitq.c +++ b/fs/autofs4/waitq.c @@ -1,15 +1,11 @@ -/* -*- c -*- --------------------------------------------------------------- * - * - * linux/fs/autofs/waitq.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * Copyright 2001-2006 Ian Kent <raven@themaw.net> +/* + * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved + * Copyright 2001-2006 Ian Kent <raven@themaw.net> * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ + */ #include <linux/slab.h> #include <linux/time.h> @@ -18,7 +14,8 @@ #include "autofs_i.h" /* We make this a static variable rather than a part of the superblock; it - is better if we don't reassign numbers easily even across filesystems */ + * is better if we don't reassign numbers easily even across filesystems + */ static autofs_wqt_t autofs4_next_wait_queue = 1; /* These are the signals we allow interrupting a pending mount */ @@ -34,7 +31,7 @@ void autofs4_catatonic_mode(struct autofs_sb_info *sbi) return; } - DPRINTK("entering catatonic mode"); + pr_debug("entering catatonic mode\n"); sbi->catatonic = 1; wq = sbi->queues; @@ -69,17 +66,19 @@ static int autofs4_write(struct autofs_sb_info *sbi, set_fs(KERNEL_DS); mutex_lock(&sbi->pipe_mutex); - while (bytes && - (wr = __vfs_write(file,data,bytes,&file->f_pos)) > 0) { + wr = __vfs_write(file, data, bytes, &file->f_pos); + while (bytes && wr) { data += wr; bytes -= wr; + wr = __vfs_write(file, data, bytes, &file->f_pos); } mutex_unlock(&sbi->pipe_mutex); set_fs(fs); /* Keep the currently executing process from receiving a - SIGPIPE unless it was already supposed to get one */ + * SIGPIPE unless it was already supposed to get one + */ if (wr == -EPIPE && !sigpipe) { spin_lock_irqsave(¤t->sighand->siglock, flags); sigdelset(¤t->pending.signal, SIGPIPE); @@ -89,7 +88,7 @@ static int autofs4_write(struct autofs_sb_info *sbi, return (bytes > 0); } - + static void autofs4_notify_daemon(struct autofs_sb_info *sbi, struct autofs_wait_queue *wq, int type) @@ -102,10 +101,11 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi, struct file *pipe = NULL; size_t pktsz; - DPRINTK("wait id = 0x%08lx, name = %.*s, type=%d", - (unsigned long) wq->wait_queue_token, wq->name.len, wq->name.name, type); + pr_debug("wait id = 0x%08lx, name = %.*s, type=%d\n", + (unsigned long) wq->wait_queue_token, + wq->name.len, wq->name.name, type); - memset(&pkt,0,sizeof pkt); /* For security reasons */ + memset(&pkt, 0, sizeof(pkt)); /* For security reasons */ pkt.hdr.proto_version = sbi->version; pkt.hdr.type = type; @@ -126,7 +126,8 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi, } case autofs_ptype_expire_multi: { - struct autofs_packet_expire_multi *ep = &pkt.v4_pkt.expire_multi; + struct autofs_packet_expire_multi *ep = + &pkt.v4_pkt.expire_multi; pktsz = sizeof(*ep); @@ -163,7 +164,7 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi, break; } default: - printk("autofs4_notify_daemon: bad type %d!\n", type); + pr_warn("bad type %d!\n", type); mutex_unlock(&sbi->wq_mutex); return; } @@ -231,7 +232,7 @@ autofs4_find_wait(struct autofs_sb_info *sbi, struct qstr *qstr) if (wq->name.hash == qstr->hash && wq->name.len == qstr->len && wq->name.name && - !memcmp(wq->name.name, qstr->name, qstr->len)) + !memcmp(wq->name.name, qstr->name, qstr->len)) break; } return wq; @@ -248,7 +249,7 @@ autofs4_find_wait(struct autofs_sb_info *sbi, struct qstr *qstr) static int validate_request(struct autofs_wait_queue **wait, struct autofs_sb_info *sbi, struct qstr *qstr, - struct dentry*dentry, enum autofs_notify notify) + struct dentry *dentry, enum autofs_notify notify) { struct autofs_wait_queue *wq; struct autofs_info *ino; @@ -322,8 +323,10 @@ static int validate_request(struct autofs_wait_queue **wait, * continue on and create a new request. */ if (!IS_ROOT(dentry)) { - if (d_really_is_positive(dentry) && d_unhashed(dentry)) { + if (d_unhashed(dentry) && + d_really_is_positive(dentry)) { struct dentry *parent = dentry->d_parent; + new = d_lookup(parent, &dentry->d_name); if (new) dentry = new; @@ -340,8 +343,8 @@ static int validate_request(struct autofs_wait_queue **wait, return 1; } -int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry, - enum autofs_notify notify) +int autofs4_wait(struct autofs_sb_info *sbi, + struct dentry *dentry, enum autofs_notify notify) { struct autofs_wait_queue *wq; struct qstr qstr; @@ -411,7 +414,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry, if (!wq) { /* Create a new wait queue */ - wq = kmalloc(sizeof(struct autofs_wait_queue),GFP_KERNEL); + wq = kmalloc(sizeof(struct autofs_wait_queue), GFP_KERNEL); if (!wq) { kfree(qstr.name); mutex_unlock(&sbi->wq_mutex); @@ -450,17 +453,19 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry, autofs_ptype_expire_indirect; } - DPRINTK("new wait id = 0x%08lx, name = %.*s, nfy=%d\n", - (unsigned long) wq->wait_queue_token, wq->name.len, - wq->name.name, notify); + pr_debug("new wait id = 0x%08lx, name = %.*s, nfy=%d\n", + (unsigned long) wq->wait_queue_token, wq->name.len, + wq->name.name, notify); - /* autofs4_notify_daemon() may block; it will unlock ->wq_mutex */ + /* + * autofs4_notify_daemon() may block; it will unlock ->wq_mutex + */ autofs4_notify_daemon(sbi, wq, type); } else { wq->wait_ctr++; - DPRINTK("existing wait id = 0x%08lx, name = %.*s, nfy=%d", - (unsigned long) wq->wait_queue_token, wq->name.len, - wq->name.name, notify); + pr_debug("existing wait id = 0x%08lx, name = %.*s, nfy=%d\n", + (unsigned long) wq->wait_queue_token, wq->name.len, + wq->name.name, notify); mutex_unlock(&sbi->wq_mutex); kfree(qstr.name); } @@ -471,12 +476,14 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry, */ if (wq->name.name) { /* Block all but "shutdown" signals while waiting */ - sigset_t oldset; + unsigned long shutdown_sigs_mask; unsigned long irqflags; + sigset_t oldset; spin_lock_irqsave(¤t->sighand->siglock, irqflags); oldset = current->blocked; - siginitsetinv(¤t->blocked, SHUTDOWN_SIGS & ~oldset.sig[0]); + shutdown_sigs_mask = SHUTDOWN_SIGS & ~oldset.sig[0]; + siginitsetinv(¤t->blocked, shutdown_sigs_mask); recalc_sigpending(); spin_unlock_irqrestore(¤t->sighand->siglock, irqflags); @@ -487,7 +494,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry, recalc_sigpending(); spin_unlock_irqrestore(¤t->sighand->siglock, irqflags); } else { - DPRINTK("skipped sleeping"); + pr_debug("skipped sleeping\n"); } status = wq->status; @@ -562,4 +569,3 @@ int autofs4_wait_release(struct autofs_sb_info *sbi, autofs_wqt_t wait_queue_tok return 0; } - diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 051ea48..7d914c6 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -653,7 +653,7 @@ static unsigned long randomize_stack_top(unsigned long stack_top) if ((current->flags & PF_RANDOMIZE) && !(current->personality & ADDR_NO_RANDOMIZE)) { - random_variable = (unsigned long) get_random_int(); + random_variable = get_random_long(); random_variable &= STACK_RND_MASK; random_variable <<= PAGE_SHIFT; } diff --git a/fs/block_dev.c b/fs/block_dev.c index 39b3a17..3172c4e 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -575,7 +575,11 @@ static const struct super_operations bdev_sops = { static struct dentry *bd_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { - return mount_pseudo(fs_type, "bdev:", &bdev_sops, NULL, BDEVFS_MAGIC); + struct dentry *dent; + dent = mount_pseudo(fs_type, "bdev:", &bdev_sops, NULL, BDEVFS_MAGIC); + if (dent) + dent->d_sb->s_iflags |= SB_I_CGROUPWB; + return dent; } static struct file_system_type bd_type = { @@ -1201,7 +1205,11 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part) bdev->bd_disk = disk; bdev->bd_queue = disk->queue; bdev->bd_contains = bdev; - bdev->bd_inode->i_flags = disk->fops->direct_access ? S_DAX : 0; + if (IS_ENABLED(CONFIG_BLK_DEV_DAX) && disk->fops->direct_access) + bdev->bd_inode->i_flags = S_DAX; + else + bdev->bd_inode->i_flags = 0; + if (!partno) { ret = -ENXIO; bdev->bd_part = disk_get_part(disk, partno); @@ -1693,13 +1701,24 @@ static int blkdev_releasepage(struct page *page, gfp_t wait) return try_to_free_buffers(page); } +static int blkdev_writepages(struct address_space *mapping, + struct writeback_control *wbc) +{ + if (dax_mapping(mapping)) { + struct block_device *bdev = I_BDEV(mapping->host); + + return dax_writeback_mapping_range(mapping, bdev, wbc); + } + return generic_writepages(mapping, wbc); +} + static const struct address_space_operations def_blk_aops = { .readpage = blkdev_readpage, .readpages = blkdev_readpages, .writepage = blkdev_writepage, .write_begin = blkdev_write_begin, .write_end = blkdev_write_end, - .writepages = generic_writepages, + .writepages = blkdev_writepages, .releasepage = blkdev_releasepage, .direct_IO = blkdev_direct_IO, .is_dirty_writeback = buffer_check_dirty_writeback, diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 4545e2e..5699bbc 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -931,7 +931,7 @@ static int check_async_write(struct inode *inode, unsigned long bio_flags) if (bio_flags & EXTENT_BIO_TREE_LOG) return 0; #ifdef CONFIG_X86 - if (static_cpu_has_safe(X86_FEATURE_XMM4_2)) + if (static_cpu_has(X86_FEATURE_XMM4_2)) return 0; #endif return 1; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 151b7c7..d96f5cf 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -7986,6 +7986,7 @@ static void btrfs_endio_direct_read(struct bio *bio) kfree(dip); + dio_bio->bi_error = bio->bi_error; dio_end_io(dio_bio, bio->bi_error); if (io_bio->end_io) @@ -8040,6 +8041,7 @@ static void btrfs_endio_direct_write(struct bio *bio) kfree(dip); + dio_bio->bi_error = bio->bi_error; dio_end_io(dio_bio, bio->bi_error); bio_put(bio); } diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index 7cf8509..2c849b0 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -310,8 +310,16 @@ int btrfs_find_orphan_roots(struct btrfs_root *tree_root) set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); err = btrfs_insert_fs_root(root->fs_info, root); + /* + * The root might have been inserted already, as before we look + * for orphan roots, log replay might have happened, which + * triggers a transaction commit and qgroup accounting, which + * in turn reads and inserts fs roots while doing backref + * walking. + */ + if (err == -EEXIST) + err = 0; if (err) { - BUG_ON(err == -EEXIST); btrfs_free_fs_root(root); break; } diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c index 0e1e61a..1c76d73 100644 --- a/fs/btrfs/tests/btrfs-tests.c +++ b/fs/btrfs/tests/btrfs-tests.c @@ -137,7 +137,6 @@ static void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info) void **slot; spin_lock(&fs_info->buffer_lock); -restart: radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) { struct extent_buffer *eb; @@ -147,7 +146,7 @@ restart: /* Shouldn't happen but that kind of thinking creates CVE's */ if (radix_tree_exception(eb)) { if (radix_tree_deref_retry(eb)) - goto restart; + slot = radix_tree_iter_retry(&iter); continue; } spin_unlock(&fs_info->buffer_lock); diff --git a/fs/buffer.c b/fs/buffer.c index e1632ab..33be296 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -621,17 +621,17 @@ EXPORT_SYMBOL(mark_buffer_dirty_inode); * If warn is true, then emit a warning if the page is not uptodate and has * not been truncated. * - * The caller must hold mem_cgroup_begin_page_stat() lock. + * The caller must hold lock_page_memcg(). */ static void __set_page_dirty(struct page *page, struct address_space *mapping, - struct mem_cgroup *memcg, int warn) + int warn) { unsigned long flags; spin_lock_irqsave(&mapping->tree_lock, flags); if (page->mapping) { /* Race with truncate? */ WARN_ON_ONCE(warn && !PageUptodate(page)); - account_page_dirtied(page, mapping, memcg); + account_page_dirtied(page, mapping); radix_tree_tag_set(&mapping->page_tree, page_index(page), PAGECACHE_TAG_DIRTY); } @@ -666,7 +666,6 @@ static void __set_page_dirty(struct page *page, struct address_space *mapping, int __set_page_dirty_buffers(struct page *page) { int newly_dirty; - struct mem_cgroup *memcg; struct address_space *mapping = page_mapping(page); if (unlikely(!mapping)) @@ -683,17 +682,17 @@ int __set_page_dirty_buffers(struct page *page) } while (bh != head); } /* - * Use mem_group_begin_page_stat() to keep PageDirty synchronized with - * per-memcg dirty page counters. + * Lock out page->mem_cgroup migration to keep PageDirty + * synchronized with per-memcg dirty page counters. */ - memcg = mem_cgroup_begin_page_stat(page); + lock_page_memcg(page); newly_dirty = !TestSetPageDirty(page); spin_unlock(&mapping->private_lock); if (newly_dirty) - __set_page_dirty(page, mapping, memcg, 1); + __set_page_dirty(page, mapping, 1); - mem_cgroup_end_page_stat(memcg); + unlock_page_memcg(page); if (newly_dirty) __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); @@ -1167,15 +1166,14 @@ void mark_buffer_dirty(struct buffer_head *bh) if (!test_set_buffer_dirty(bh)) { struct page *page = bh->b_page; struct address_space *mapping = NULL; - struct mem_cgroup *memcg; - memcg = mem_cgroup_begin_page_stat(page); + lock_page_memcg(page); if (!TestSetPageDirty(page)) { mapping = page_mapping(page); if (mapping) - __set_page_dirty(page, mapping, memcg, 0); + __set_page_dirty(page, mapping, 0); } - mem_cgroup_end_page_stat(memcg); + unlock_page_memcg(page); if (mapping) __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); } diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index c222137..19adeb0 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -1756,6 +1756,10 @@ int ceph_pool_perm_check(struct ceph_inode_info *ci, int need) u32 pool; int ret, flags; + /* does not support pool namespace yet */ + if (ci->i_pool_ns_len) + return -EIO; + if (ceph_test_mount_opt(ceph_inode_to_client(&ci->vfs_inode), NOPOOLPERM)) return 0; diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index cdbf8cf..6fe0ad2 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -2753,7 +2753,8 @@ static void handle_cap_grant(struct ceph_mds_client *mdsc, void *inline_data, int inline_len, struct ceph_buffer *xattr_buf, struct ceph_mds_session *session, - struct ceph_cap *cap, int issued) + struct ceph_cap *cap, int issued, + u32 pool_ns_len) __releases(ci->i_ceph_lock) __releases(mdsc->snap_rwsem) { @@ -2873,6 +2874,8 @@ static void handle_cap_grant(struct ceph_mds_client *mdsc, if (newcaps & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR)) { /* file layout may have changed */ ci->i_layout = grant->layout; + ci->i_pool_ns_len = pool_ns_len; + /* size/truncate_seq? */ queue_trunc = ceph_fill_file_size(inode, issued, le32_to_cpu(grant->truncate_seq), @@ -3411,6 +3414,7 @@ void ceph_handle_caps(struct ceph_mds_session *session, u32 inline_len = 0; void *snaptrace; size_t snaptrace_len; + u32 pool_ns_len = 0; void *p, *end; dout("handle_caps from mds%d\n", mds); @@ -3463,6 +3467,21 @@ void ceph_handle_caps(struct ceph_mds_session *session, p += inline_len; } + if (le16_to_cpu(msg->hdr.version) >= 8) { + u64 flush_tid; + u32 caller_uid, caller_gid; + u32 osd_epoch_barrier; + /* version >= 5 */ + ceph_decode_32_safe(&p, end, osd_epoch_barrier, bad); + /* version >= 6 */ + ceph_decode_64_safe(&p, end, flush_tid, bad); + /* version >= 7 */ + ceph_decode_32_safe(&p, end, caller_uid, bad); + ceph_decode_32_safe(&p, end, caller_gid, bad); + /* version >= 8 */ + ceph_decode_32_safe(&p, end, pool_ns_len, bad); + } + /* lookup ino */ inode = ceph_find_inode(sb, vino); ci = ceph_inode(inode); @@ -3518,7 +3537,8 @@ void ceph_handle_caps(struct ceph_mds_session *session, &cap, &issued); handle_cap_grant(mdsc, inode, h, inline_version, inline_data, inline_len, - msg->middle, session, cap, issued); + msg->middle, session, cap, issued, + pool_ns_len); if (realm) ceph_put_snap_realm(mdsc, realm); goto done_unlocked; @@ -3542,7 +3562,8 @@ void ceph_handle_caps(struct ceph_mds_session *session, issued |= __ceph_caps_dirty(ci); handle_cap_grant(mdsc, inode, h, inline_version, inline_data, inline_len, - msg->middle, session, cap, issued); + msg->middle, session, cap, issued, + pool_ns_len); goto done_unlocked; case CEPH_CAP_OP_FLUSH_ACK: diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index be2d87f..e48fd8b 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -396,6 +396,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb) ci->i_symlink = NULL; memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); + ci->i_pool_ns_len = 0; ci->i_fragtree = RB_ROOT; mutex_init(&ci->i_fragtree_mutex); @@ -756,6 +757,7 @@ static int fill_inode(struct inode *inode, struct page *locked_page, if (ci->i_layout.fl_pg_pool != info->layout.fl_pg_pool) ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; ci->i_layout = info->layout; + ci->i_pool_ns_len = iinfo->pool_ns_len; queue_trunc = ceph_fill_file_size(inode, issued, le32_to_cpu(info->truncate_seq), diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index e7b130a..911d64d 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -100,6 +100,14 @@ static int parse_reply_info_in(void **p, void *end, } else info->inline_version = CEPH_INLINE_NONE; + if (features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) { + ceph_decode_32_safe(p, end, info->pool_ns_len, bad); + ceph_decode_need(p, end, info->pool_ns_len, bad); + *p += info->pool_ns_len; + } else { + info->pool_ns_len = 0; + } + return 0; bad: return err; @@ -2298,6 +2306,14 @@ int ceph_mdsc_do_request(struct ceph_mds_client *mdsc, ceph_get_cap_refs(ceph_inode(req->r_old_dentry_dir), CEPH_CAP_PIN); + /* deny access to directories with pool_ns layouts */ + if (req->r_inode && S_ISDIR(req->r_inode->i_mode) && + ceph_inode(req->r_inode)->i_pool_ns_len) + return -EIO; + if (req->r_locked_dir && + ceph_inode(req->r_locked_dir)->i_pool_ns_len) + return -EIO; + /* issue */ mutex_lock(&mdsc->mutex); __register_request(mdsc, req, dir); diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index ccf11ef..37712cc 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -44,6 +44,7 @@ struct ceph_mds_reply_info_in { u64 inline_version; u32 inline_len; char *inline_data; + u32 pool_ns_len; }; /* diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 75b7d12..9c458eb 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -287,6 +287,7 @@ struct ceph_inode_info { struct ceph_dir_layout i_dir_layout; struct ceph_file_layout i_layout; + size_t i_pool_ns_len; char *i_symlink; /* for dirs */ diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c index 50b2684..788e191 100644 --- a/fs/cifs/cifs_debug.c +++ b/fs/cifs/cifs_debug.c @@ -255,7 +255,6 @@ static const struct file_operations cifs_debug_data_proc_fops = { static ssize_t cifs_stats_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { - char c; bool bv; int rc; struct list_head *tmp1, *tmp2, *tmp3; @@ -263,11 +262,8 @@ static ssize_t cifs_stats_proc_write(struct file *file, struct cifs_ses *ses; struct cifs_tcon *tcon; - rc = get_user(c, buffer); - if (rc) - return rc; - - if (strtobool(&c, &bv) == 0) { + rc = kstrtobool_from_user(buffer, count, &bv); + if (rc == 0) { #ifdef CONFIG_CIFS_STATS2 atomic_set(&totBufAllocCount, 0); atomic_set(&totSmBufAllocCount, 0); @@ -290,6 +286,8 @@ static ssize_t cifs_stats_proc_write(struct file *file, } } spin_unlock(&cifs_tcp_ses_lock); + } else { + return rc; } return count; @@ -433,17 +431,17 @@ static int cifsFYI_proc_open(struct inode *inode, struct file *file) static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { - char c; + char c[2] = { '\0' }; bool bv; int rc; - rc = get_user(c, buffer); + rc = get_user(c[0], buffer); if (rc) return rc; - if (strtobool(&c, &bv) == 0) + if (strtobool(c, &bv) == 0) cifsFYI = bv; - else if ((c > '1') && (c <= '9')) - cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */ + else if ((c[0] > '1') && (c[0] <= '9')) + cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */ return count; } @@ -471,20 +469,12 @@ static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file) static ssize_t cifs_linux_ext_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { - char c; - bool bv; int rc; - rc = get_user(c, buffer); + rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled); if (rc) return rc; - rc = strtobool(&c, &bv); - if (rc) - return rc; - - linuxExtEnabled = bv; - return count; } @@ -511,20 +501,12 @@ static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file) static ssize_t cifs_lookup_cache_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { - char c; - bool bv; int rc; - rc = get_user(c, buffer); + rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled); if (rc) return rc; - rc = strtobool(&c, &bv); - if (rc) - return rc; - - lookupCacheEnabled = bv; - return count; } @@ -551,20 +533,12 @@ static int traceSMB_proc_open(struct inode *inode, struct file *file) static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { - char c; - bool bv; int rc; - rc = get_user(c, buffer); + rc = kstrtobool_from_user(buffer, count, &traceSMB); if (rc) return rc; - rc = strtobool(&c, &bv); - if (rc) - return rc; - - traceSMB = bv; - return count; } @@ -622,7 +596,6 @@ static ssize_t cifs_security_flags_proc_write(struct file *file, int rc; unsigned int flags; char flags_string[12]; - char c; bool bv; if ((count < 1) || (count > 11)) @@ -635,11 +608,10 @@ static ssize_t cifs_security_flags_proc_write(struct file *file, if (count < 3) { /* single char or single char followed by null */ - c = flags_string[0]; - if (strtobool(&c, &bv) == 0) { + if (strtobool(flags_string, &bv) == 0) { global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF; return count; - } else if (!isdigit(c)) { + } else if (!isdigit(flags_string[0])) { cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string); return -EINVAL; diff --git a/fs/cifs/cifs_debug.h b/fs/cifs/cifs_debug.h index 66cf0f9..c611ca2 100644 --- a/fs/cifs/cifs_debug.h +++ b/fs/cifs/cifs_debug.h @@ -25,7 +25,7 @@ void cifs_dump_mem(char *label, void *data, int length); void cifs_dump_detail(void *); void cifs_dump_mids(struct TCP_Server_Info *); -extern int traceSMB; /* flag which enables the function below */ +extern bool traceSMB; /* flag which enables the function below */ void dump_smb(void *, int); #define CIFS_INFO 0x01 #define CIFS_RC 0x02 diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c index 7dc886c..e956cba 100644 --- a/fs/cifs/cifs_dfs_ref.c +++ b/fs/cifs/cifs_dfs_ref.c @@ -175,7 +175,7 @@ char *cifs_compose_mount_options(const char *sb_mountdata, * string to the length of the original string to allow for worst case. */ md_len = strlen(sb_mountdata) + INET6_ADDRSTRLEN; - mountdata = kzalloc(md_len + 1, GFP_KERNEL); + mountdata = kzalloc(md_len + sizeof("ip=") + 1, GFP_KERNEL); if (mountdata == NULL) { rc = -ENOMEM; goto compose_mount_options_err; diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c index afa09fc..4897dac 100644 --- a/fs/cifs/cifsencrypt.c +++ b/fs/cifs/cifsencrypt.c @@ -33,6 +33,7 @@ #include <linux/ctype.h> #include <linux/random.h> #include <linux/highmem.h> +#include <crypto/skcipher.h> static int cifs_crypto_shash_md5_allocate(struct TCP_Server_Info *server) @@ -714,7 +715,7 @@ setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp) ses->auth_key.response = kmalloc(baselen + tilen, GFP_KERNEL); if (!ses->auth_key.response) { - rc = ENOMEM; + rc = -ENOMEM; ses->auth_key.len = 0; goto setup_ntlmv2_rsp_ret; } @@ -789,38 +790,46 @@ int calc_seckey(struct cifs_ses *ses) { int rc; - struct crypto_blkcipher *tfm_arc4; + struct crypto_skcipher *tfm_arc4; struct scatterlist sgin, sgout; - struct blkcipher_desc desc; + struct skcipher_request *req; unsigned char sec_key[CIFS_SESS_KEY_SIZE]; /* a nonce */ get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE); - tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC); + tfm_arc4 = crypto_alloc_skcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC); if (IS_ERR(tfm_arc4)) { rc = PTR_ERR(tfm_arc4); cifs_dbg(VFS, "could not allocate crypto API arc4\n"); return rc; } - desc.tfm = tfm_arc4; - - rc = crypto_blkcipher_setkey(tfm_arc4, ses->auth_key.response, + rc = crypto_skcipher_setkey(tfm_arc4, ses->auth_key.response, CIFS_SESS_KEY_SIZE); if (rc) { cifs_dbg(VFS, "%s: Could not set response as a key\n", __func__); - return rc; + goto out_free_cipher; + } + + req = skcipher_request_alloc(tfm_arc4, GFP_KERNEL); + if (!req) { + rc = -ENOMEM; + cifs_dbg(VFS, "could not allocate crypto API arc4 request\n"); + goto out_free_cipher; } sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE); sg_init_one(&sgout, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE); - rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE); + skcipher_request_set_callback(req, 0, NULL, NULL); + skcipher_request_set_crypt(req, &sgin, &sgout, CIFS_CPHTXT_SIZE, NULL); + + rc = crypto_skcipher_encrypt(req); + skcipher_request_free(req); if (rc) { cifs_dbg(VFS, "could not encrypt session key rc: %d\n", rc); - crypto_free_blkcipher(tfm_arc4); - return rc; + goto out_free_cipher; } /* make secondary_key/nonce as session key */ @@ -828,7 +837,8 @@ calc_seckey(struct cifs_ses *ses) /* and make len as that of session key only */ ses->auth_key.len = CIFS_SESS_KEY_SIZE; - crypto_free_blkcipher(tfm_arc4); +out_free_cipher: + crypto_free_skcipher(tfm_arc4); return rc; } diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 09b1db2..1d86fc6 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -54,10 +54,10 @@ #endif int cifsFYI = 0; -int traceSMB = 0; +bool traceSMB; bool enable_oplocks = true; -unsigned int linuxExtEnabled = 1; -unsigned int lookupCacheEnabled = 1; +bool linuxExtEnabled = true; +bool lookupCacheEnabled = true; unsigned int global_secflags = CIFSSEC_DEF; /* unsigned int ntlmv2_support = 0; */ unsigned int sign_CIFS_PDUs = 1; @@ -1011,7 +1011,6 @@ const struct file_operations cifs_file_strict_ops = { .llseek = cifs_llseek, .unlocked_ioctl = cifs_ioctl, .clone_file_range = cifs_clone_file_range, - .clone_file_range = cifs_clone_file_range, .setlease = cifs_setlease, .fallocate = cifs_fallocate, }; diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index 68c4547..83aac8b 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -31,19 +31,15 @@ * so that it will fit. We use hash_64 to convert the value to 31 bits, and * then add 1, to ensure that we don't end up with a 0 as the value. */ -#if BITS_PER_LONG == 64 static inline ino_t cifs_uniqueid_to_ino_t(u64 fileid) { + if ((sizeof(ino_t)) < (sizeof(u64))) + return (ino_t)hash_64(fileid, (sizeof(ino_t) * 8) - 1) + 1; + return (ino_t)fileid; + } -#else -static inline ino_t -cifs_uniqueid_to_ino_t(u64 fileid) -{ - return (ino_t)hash_64(fileid, (sizeof(ino_t) * 8) - 1) + 1; -} -#endif extern struct file_system_type cifs_fs_type; extern const struct address_space_operations cifs_addr_ops; diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index a25b251..d21da9f 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -1596,11 +1596,11 @@ GLOBAL_EXTERN atomic_t midCount; /* Misc globals */ GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */ -GLOBAL_EXTERN unsigned int lookupCacheEnabled; +GLOBAL_EXTERN bool lookupCacheEnabled; GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent with more secure ntlmssp2 challenge/resp */ GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ -GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ +GLOBAL_EXTERN bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */ GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */ diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 90b4f9f..76fcb50 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -1396,11 +1396,10 @@ openRetry: * current bigbuf. */ static int -cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid) +discard_remaining_data(struct TCP_Server_Info *server) { unsigned int rfclen = get_rfc1002_length(server->smallbuf); int remaining = rfclen + 4 - server->total_read; - struct cifs_readdata *rdata = mid->callback_data; while (remaining > 0) { int length; @@ -1414,10 +1413,20 @@ cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid) remaining -= length; } - dequeue_mid(mid, rdata->result); return 0; } +static int +cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid) +{ + int length; + struct cifs_readdata *rdata = mid->callback_data; + + length = discard_remaining_data(server); + dequeue_mid(mid, rdata->result); + return length; +} + int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) { @@ -1446,6 +1455,12 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) return length; server->total_read += length; + if (server->ops->is_status_pending && + server->ops->is_status_pending(buf, server, 0)) { + discard_remaining_data(server); + return -1; + } + /* Was the SMB read successful? */ rdata->result = server->ops->map_error(buf, false); if (rdata->result != 0) { diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 4fbd92d..a763cd3 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -2999,8 +2999,7 @@ ip_rfc1001_connect(struct TCP_Server_Info *server) if (ses_init_buf) { ses_init_buf->trailer.session_req.called_len = 32; - if (server->server_RFC1001_name && - server->server_RFC1001_name[0] != 0) + if (server->server_RFC1001_name[0] != 0) rfc1002mangle(ses_init_buf->trailer. session_req.called_name, server->server_RFC1001_name, diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 10f8d5c..42e1f44 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1106,21 +1106,25 @@ parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp, { char *data_offset; struct create_context *cc; - unsigned int next = 0; + unsigned int next; + unsigned int remaining; char *name; data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset); + remaining = le32_to_cpu(rsp->CreateContextsLength); cc = (struct create_context *)data_offset; - do { - cc = (struct create_context *)((char *)cc + next); + while (remaining >= sizeof(struct create_context)) { name = le16_to_cpu(cc->NameOffset) + (char *)cc; - if (le16_to_cpu(cc->NameLength) != 4 || - strncmp(name, "RqLs", 4)) { - next = le32_to_cpu(cc->Next); - continue; - } - return server->ops->parse_lease_buf(cc, epoch); - } while (next != 0); + if (le16_to_cpu(cc->NameLength) == 4 && + strncmp(name, "RqLs", 4) == 0) + return server->ops->parse_lease_buf(cc, epoch); + + next = le32_to_cpu(cc->Next); + if (!next) + break; + remaining -= next; + cc = (struct create_context *)((char *)cc + next); + } return 0; } diff --git a/fs/cifs/smbencrypt.c b/fs/cifs/smbencrypt.c index a4232ec..699b786 100644 --- a/fs/cifs/smbencrypt.c +++ b/fs/cifs/smbencrypt.c @@ -23,6 +23,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ +#include <crypto/skcipher.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/fs.h> @@ -70,31 +71,42 @@ smbhash(unsigned char *out, const unsigned char *in, unsigned char *key) { int rc; unsigned char key2[8]; - struct crypto_blkcipher *tfm_des; + struct crypto_skcipher *tfm_des; struct scatterlist sgin, sgout; - struct blkcipher_desc desc; + struct skcipher_request *req; str_to_key(key, key2); - tfm_des = crypto_alloc_blkcipher("ecb(des)", 0, CRYPTO_ALG_ASYNC); + tfm_des = crypto_alloc_skcipher("ecb(des)", 0, CRYPTO_ALG_ASYNC); if (IS_ERR(tfm_des)) { rc = PTR_ERR(tfm_des); cifs_dbg(VFS, "could not allocate des crypto API\n"); goto smbhash_err; } - desc.tfm = tfm_des; + req = skcipher_request_alloc(tfm_des, GFP_KERNEL); + if (!req) { + rc = -ENOMEM; + cifs_dbg(VFS, "could not allocate des crypto API\n"); + goto smbhash_free_skcipher; + } - crypto_blkcipher_setkey(tfm_des, key2, 8); + crypto_skcipher_setkey(tfm_des, key2, 8); sg_init_one(&sgin, in, 8); sg_init_one(&sgout, out, 8); - rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, 8); + skcipher_request_set_callback(req, 0, NULL, NULL); + skcipher_request_set_crypt(req, &sgin, &sgout, 8, NULL); + + rc = crypto_skcipher_encrypt(req); if (rc) cifs_dbg(VFS, "could not encrypt crypt key rc: %d\n", rc); - crypto_free_blkcipher(tfm_des); + skcipher_request_free(req); + +smbhash_free_skcipher: + crypto_free_skcipher(tfm_des); smbhash_err: return rc; } diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index 6402eaf..bd01b92 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -1040,28 +1040,6 @@ COMPATIBLE_IOCTL(PPPIOCGL2TPSTATS) /* PPPOX */ COMPATIBLE_IOCTL(PPPOEIOCSFWD) COMPATIBLE_IOCTL(PPPOEIOCDFWD) -/* ppdev */ -COMPATIBLE_IOCTL(PPSETMODE) -COMPATIBLE_IOCTL(PPRSTATUS) -COMPATIBLE_IOCTL(PPRCONTROL) -COMPATIBLE_IOCTL(PPWCONTROL) -COMPATIBLE_IOCTL(PPFCONTROL) -COMPATIBLE_IOCTL(PPRDATA) -COMPATIBLE_IOCTL(PPWDATA) -COMPATIBLE_IOCTL(PPCLAIM) -COMPATIBLE_IOCTL(PPRELEASE) -COMPATIBLE_IOCTL(PPYIELD) -COMPATIBLE_IOCTL(PPEXCL) -COMPATIBLE_IOCTL(PPDATADIR) -COMPATIBLE_IOCTL(PPNEGOT) -COMPATIBLE_IOCTL(PPWCTLONIRQ) -COMPATIBLE_IOCTL(PPCLRIRQ) -COMPATIBLE_IOCTL(PPSETPHASE) -COMPATIBLE_IOCTL(PPGETMODES) -COMPATIBLE_IOCTL(PPGETMODE) -COMPATIBLE_IOCTL(PPGETPHASE) -COMPATIBLE_IOCTL(PPGETFLAGS) -COMPATIBLE_IOCTL(PPSETFLAGS) /* Big A */ /* sparc only */ /* Big Q for sound/OSS */ diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c index 214ec14..ea59c89 100644 --- a/fs/configfs/dir.c +++ b/fs/configfs/dir.c @@ -696,23 +696,29 @@ static int populate_groups(struct config_group *group) { struct config_group *new_group; int ret = 0; - int i; - - if (group->default_groups) { - for (i = 0; group->default_groups[i]; i++) { - new_group = group->default_groups[i]; - ret = create_default_group(group, new_group); - if (ret) { - detach_groups(group); - break; - } + list_for_each_entry(new_group, &group->default_groups, group_entry) { + ret = create_default_group(group, new_group); + if (ret) { + detach_groups(group); + break; } } return ret; } +void configfs_remove_default_groups(struct config_group *group) +{ + struct config_group *g, *n; + + list_for_each_entry_safe(g, n, &group->default_groups, group_entry) { + list_del(&g->group_entry); + config_item_put(&g->cg_item); + } +} +EXPORT_SYMBOL(configfs_remove_default_groups); + /* * All of link_obj/unlink_obj/link_group/unlink_group require that * subsys->su_mutex is held. @@ -761,15 +767,10 @@ static void link_obj(struct config_item *parent_item, struct config_item *item) static void unlink_group(struct config_group *group) { - int i; struct config_group *new_group; - if (group->default_groups) { - for (i = 0; group->default_groups[i]; i++) { - new_group = group->default_groups[i]; - unlink_group(new_group); - } - } + list_for_each_entry(new_group, &group->default_groups, group_entry) + unlink_group(new_group); group->cg_subsys = NULL; unlink_obj(&group->cg_item); @@ -777,7 +778,6 @@ static void unlink_group(struct config_group *group) static void link_group(struct config_group *parent_group, struct config_group *group) { - int i; struct config_group *new_group; struct configfs_subsystem *subsys = NULL; /* gcc is a turd */ @@ -791,12 +791,8 @@ static void link_group(struct config_group *parent_group, struct config_group *g BUG(); group->cg_subsys = subsys; - if (group->default_groups) { - for (i = 0; group->default_groups[i]; i++) { - new_group = group->default_groups[i]; - link_group(group, new_group); - } - } + list_for_each_entry(new_group, &group->default_groups, group_entry) + link_group(group, new_group); } /* diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c index 45811ea..03d124a 100644 --- a/fs/configfs/inode.c +++ b/fs/configfs/inode.c @@ -75,7 +75,8 @@ int configfs_setattr(struct dentry * dentry, struct iattr * iattr) sd_iattr->ia_mode = sd->s_mode; sd_iattr->ia_uid = GLOBAL_ROOT_UID; sd_iattr->ia_gid = GLOBAL_ROOT_GID; - sd_iattr->ia_atime = sd_iattr->ia_mtime = sd_iattr->ia_ctime = CURRENT_TIME; + sd_iattr->ia_atime = sd_iattr->ia_mtime = + sd_iattr->ia_ctime = current_fs_time(inode->i_sb); sd->s_iattr = sd_iattr; } /* attributes were changed atleast once in past */ @@ -111,7 +112,8 @@ int configfs_setattr(struct dentry * dentry, struct iattr * iattr) static inline void set_default_inode_attr(struct inode * inode, umode_t mode) { inode->i_mode = mode; - inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; + inode->i_atime = inode->i_mtime = + inode->i_ctime = current_fs_time(inode->i_sb); } static inline void set_inode_attr(struct inode * inode, struct iattr * iattr) @@ -195,7 +197,7 @@ int configfs_create(struct dentry * dentry, umode_t mode, void (*init)(struct in return -ENOMEM; p_inode = d_inode(dentry->d_parent); - p_inode->i_mtime = p_inode->i_ctime = CURRENT_TIME; + p_inode->i_mtime = p_inode->i_ctime = current_fs_time(p_inode->i_sb); configfs_set_inode_lock_class(sd, inode); init(inode); diff --git a/fs/configfs/item.c b/fs/configfs/item.c index b863a09..8b2a994 100644 --- a/fs/configfs/item.c +++ b/fs/configfs/item.c @@ -182,6 +182,7 @@ void config_group_init(struct config_group *group) { config_item_init(&group->cg_item); INIT_LIST_HEAD(&group->cg_children); + INIT_LIST_HEAD(&group->default_groups); } EXPORT_SYMBOL(config_group_init); @@ -79,15 +79,14 @@ struct page *read_dax_sector(struct block_device *bdev, sector_t n) } /* - * dax_clear_blocks() is called from within transaction context from XFS, + * dax_clear_sectors() is called from within transaction context from XFS, * and hence this means the stack from this point must follow GFP_NOFS * semantics for all operations. */ -int dax_clear_blocks(struct inode *inode, sector_t block, long _size) +int dax_clear_sectors(struct block_device *bdev, sector_t _sector, long _size) { - struct block_device *bdev = inode->i_sb->s_bdev; struct blk_dax_ctl dax = { - .sector = block << (inode->i_blkbits - 9), + .sector = _sector, .size = _size, }; @@ -109,7 +108,7 @@ int dax_clear_blocks(struct inode *inode, sector_t block, long _size) wmb_pmem(); return 0; } -EXPORT_SYMBOL_GPL(dax_clear_blocks); +EXPORT_SYMBOL_GPL(dax_clear_sectors); /* the clear_pmem() calls are ordered by a wmb_pmem() in the caller */ static void dax_new_buf(void __pmem *addr, unsigned size, unsigned first, @@ -485,11 +484,10 @@ static int dax_writeback_one(struct block_device *bdev, * end]. This is required by data integrity operations to ensure file data is * on persistent storage prior to completion of the operation. */ -int dax_writeback_mapping_range(struct address_space *mapping, loff_t start, - loff_t end) +int dax_writeback_mapping_range(struct address_space *mapping, + struct block_device *bdev, struct writeback_control *wbc) { struct inode *inode = mapping->host; - struct block_device *bdev = inode->i_sb->s_bdev; pgoff_t start_index, end_index, pmd_index; pgoff_t indices[PAGEVEC_SIZE]; struct pagevec pvec; @@ -500,8 +498,11 @@ int dax_writeback_mapping_range(struct address_space *mapping, loff_t start, if (WARN_ON_ONCE(inode->i_blkbits != PAGE_SHIFT)) return -EIO; - start_index = start >> PAGE_CACHE_SHIFT; - end_index = end >> PAGE_CACHE_SHIFT; + if (!mapping->nrexceptional || wbc->sync_mode != WB_SYNC_ALL) + return 0; + + start_index = wbc->range_start >> PAGE_CACHE_SHIFT; + end_index = wbc->range_end >> PAGE_CACHE_SHIFT; pmd_index = DAX_PMD_INDEX(start_index); rcu_read_lock(); @@ -1055,6 +1056,7 @@ EXPORT_SYMBOL_GPL(dax_pmd_fault); int dax_pfn_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) { struct file *file = vma->vm_file; + int error; /* * We pass NO_SECTOR to dax_radix_entry() because we expect that a @@ -1064,7 +1066,13 @@ int dax_pfn_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) * saves us from having to make a call to get_block() here to look * up the sector. */ - dax_radix_entry(file->f_mapping, vmf->pgoff, NO_SECTOR, false, true); + error = dax_radix_entry(file->f_mapping, vmf->pgoff, NO_SECTOR, false, + true); + + if (error == -ENOMEM) + return VM_FAULT_OOM; + if (error) + return VM_FAULT_SIGBUS; return VM_FAULT_NOPAGE; } EXPORT_SYMBOL_GPL(dax_pfn_mkwrite); diff --git a/fs/direct-io.c b/fs/direct-io.c index 8546317..0a8d937 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -473,8 +473,8 @@ static int dio_bio_complete(struct dio *dio, struct bio *bio) dio->io_error = -EIO; if (dio->is_async && dio->rw == READ && dio->should_dirty) { - bio_check_pages_dirty(bio); /* transfers ownership */ err = bio->bi_error; + bio_check_pages_dirty(bio); /* transfers ownership */ } else { bio_for_each_segment_all(bvec, bio, i) { struct page *page = bvec->bv_page; diff --git a/fs/dlm/config.c b/fs/dlm/config.c index 8e294fb..5191121 100644 --- a/fs/dlm/config.c +++ b/fs/dlm/config.c @@ -346,7 +346,6 @@ static struct config_group *make_cluster(struct config_group *g, void *gps = NULL; cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS); - gps = kcalloc(3, sizeof(struct config_group *), GFP_NOFS); sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS); cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS); @@ -357,10 +356,8 @@ static struct config_group *make_cluster(struct config_group *g, config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type); config_group_init_type_name(&cms->cs_group, "comms", &comms_type); - cl->group.default_groups = gps; - cl->group.default_groups[0] = &sps->ss_group; - cl->group.default_groups[1] = &cms->cs_group; - cl->group.default_groups[2] = NULL; + configfs_add_default_group(&sps->ss_group, &cl->group); + configfs_add_default_group(&cms->cs_group, &cl->group); cl->cl_tcp_port = dlm_config.ci_tcp_port; cl->cl_buffer_size = dlm_config.ci_buffer_size; @@ -383,7 +380,6 @@ static struct config_group *make_cluster(struct config_group *g, fail: kfree(cl); - kfree(gps); kfree(sps); kfree(cms); return ERR_PTR(-ENOMEM); @@ -392,14 +388,8 @@ static struct config_group *make_cluster(struct config_group *g, static void drop_cluster(struct config_group *g, struct config_item *i) { struct dlm_cluster *cl = config_item_to_cluster(i); - struct config_item *tmp; - int j; - for (j = 0; cl->group.default_groups[j]; j++) { - tmp = &cl->group.default_groups[j]->cg_item; - cl->group.default_groups[j] = NULL; - config_item_put(tmp); - } + configfs_remove_default_groups(&cl->group); space_list = NULL; comm_list = NULL; @@ -410,7 +400,6 @@ static void drop_cluster(struct config_group *g, struct config_item *i) static void release_cluster(struct config_item *i) { struct dlm_cluster *cl = config_item_to_cluster(i); - kfree(cl->group.default_groups); kfree(cl); } @@ -418,21 +407,17 @@ static struct config_group *make_space(struct config_group *g, const char *name) { struct dlm_space *sp = NULL; struct dlm_nodes *nds = NULL; - void *gps = NULL; sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS); - gps = kcalloc(2, sizeof(struct config_group *), GFP_NOFS); nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS); - if (!sp || !gps || !nds) + if (!sp || !nds) goto fail; config_group_init_type_name(&sp->group, name, &space_type); - config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); - sp->group.default_groups = gps; - sp->group.default_groups[0] = &nds->ns_group; - sp->group.default_groups[1] = NULL; + config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); + configfs_add_default_group(&nds->ns_group, &sp->group); INIT_LIST_HEAD(&sp->members); mutex_init(&sp->members_lock); @@ -441,7 +426,6 @@ static struct config_group *make_space(struct config_group *g, const char *name) fail: kfree(sp); - kfree(gps); kfree(nds); return ERR_PTR(-ENOMEM); } @@ -449,24 +433,16 @@ static struct config_group *make_space(struct config_group *g, const char *name) static void drop_space(struct config_group *g, struct config_item *i) { struct dlm_space *sp = config_item_to_space(i); - struct config_item *tmp; - int j; /* assert list_empty(&sp->members) */ - for (j = 0; sp->group.default_groups[j]; j++) { - tmp = &sp->group.default_groups[j]->cg_item; - sp->group.default_groups[j] = NULL; - config_item_put(tmp); - } - + configfs_remove_default_groups(&sp->group); config_item_put(i); } static void release_space(struct config_item *i) { struct dlm_space *sp = config_item_to_space(i); - kfree(sp->group.default_groups); kfree(sp); } diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c index 3a37bd3..00640e7 100644 --- a/fs/dlm/lowcomms.c +++ b/fs/dlm/lowcomms.c @@ -124,7 +124,10 @@ struct connection { struct connection *othercon; struct work_struct rwork; /* Receive workqueue */ struct work_struct swork; /* Send workqueue */ - void (*orig_error_report)(struct sock *sk); + void (*orig_error_report)(struct sock *); + void (*orig_data_ready)(struct sock *); + void (*orig_state_change)(struct sock *); + void (*orig_write_space)(struct sock *); }; #define sock2con(x) ((struct connection *)(x)->sk_user_data) @@ -467,16 +470,24 @@ int dlm_lowcomms_connect_node(int nodeid) static void lowcomms_error_report(struct sock *sk) { - struct connection *con = sock2con(sk); + struct connection *con; struct sockaddr_storage saddr; + int buflen; + void (*orig_report)(struct sock *) = NULL; - if (nodeid_to_addr(con->nodeid, &saddr, NULL, false)) { + read_lock_bh(&sk->sk_callback_lock); + con = sock2con(sk); + if (con == NULL) + goto out; + + orig_report = con->orig_error_report; + if (con->sock == NULL || + kernel_getpeername(con->sock, (struct sockaddr *)&saddr, &buflen)) { printk_ratelimited(KERN_ERR "dlm: node %d: socket error " "sending to node %d, port %d, " "sk_err=%d/%d\n", dlm_our_nodeid(), con->nodeid, dlm_config.ci_tcp_port, sk->sk_err, sk->sk_err_soft); - return; } else if (saddr.ss_family == AF_INET) { struct sockaddr_in *sin4 = (struct sockaddr_in *)&saddr; @@ -499,22 +510,54 @@ static void lowcomms_error_report(struct sock *sk) dlm_config.ci_tcp_port, sk->sk_err, sk->sk_err_soft); } - con->orig_error_report(sk); +out: + read_unlock_bh(&sk->sk_callback_lock); + if (orig_report) + orig_report(sk); +} + +/* Note: sk_callback_lock must be locked before calling this function. */ +static void save_callbacks(struct connection *con, struct sock *sk) +{ + lock_sock(sk); + con->orig_data_ready = sk->sk_data_ready; + con->orig_state_change = sk->sk_state_change; + con->orig_write_space = sk->sk_write_space; + con->orig_error_report = sk->sk_error_report; + release_sock(sk); +} + +static void restore_callbacks(struct connection *con, struct sock *sk) +{ + write_lock_bh(&sk->sk_callback_lock); + lock_sock(sk); + sk->sk_user_data = NULL; + sk->sk_data_ready = con->orig_data_ready; + sk->sk_state_change = con->orig_state_change; + sk->sk_write_space = con->orig_write_space; + sk->sk_error_report = con->orig_error_report; + release_sock(sk); + write_unlock_bh(&sk->sk_callback_lock); } /* Make a socket active */ static void add_sock(struct socket *sock, struct connection *con) { + struct sock *sk = sock->sk; + + write_lock_bh(&sk->sk_callback_lock); con->sock = sock; + sk->sk_user_data = con; + if (!test_bit(CF_IS_OTHERCON, &con->flags)) + save_callbacks(con, sk); /* Install a data_ready callback */ - con->sock->sk->sk_data_ready = lowcomms_data_ready; - con->sock->sk->sk_write_space = lowcomms_write_space; - con->sock->sk->sk_state_change = lowcomms_state_change; - con->sock->sk->sk_user_data = con; - con->sock->sk->sk_allocation = GFP_NOFS; - con->orig_error_report = con->sock->sk->sk_error_report; - con->sock->sk->sk_error_report = lowcomms_error_report; + sk->sk_data_ready = lowcomms_data_ready; + sk->sk_write_space = lowcomms_write_space; + sk->sk_state_change = lowcomms_state_change; + sk->sk_allocation = GFP_NOFS; + sk->sk_error_report = lowcomms_error_report; + write_unlock_bh(&sk->sk_callback_lock); } /* Add the port number to an IPv6 or 4 sockaddr and return the address @@ -549,6 +592,8 @@ static void close_connection(struct connection *con, bool and_other, mutex_lock(&con->sock_mutex); if (con->sock) { + if (!test_bit(CF_IS_OTHERCON, &con->flags)) + restore_callbacks(con, con->sock->sk); sock_release(con->sock); con->sock = NULL; } @@ -1190,6 +1235,8 @@ static struct socket *tcp_create_listen_sock(struct connection *con, if (result < 0) { log_print("Failed to set SO_REUSEADDR on socket: %d", result); } + sock->sk->sk_user_data = con; + con->rx_action = tcp_accept_from_sock; con->connect_action = tcp_connect_to_sock; @@ -1271,6 +1318,7 @@ static int sctp_listen_for_all(void) if (result < 0) log_print("Could not set SCTP NODELAY error %d\n", result); + write_lock_bh(&sock->sk->sk_callback_lock); /* Init con struct */ sock->sk->sk_user_data = con; con->sock = sock; @@ -1278,6 +1326,8 @@ static int sctp_listen_for_all(void) con->rx_action = sctp_accept_from_sock; con->connect_action = sctp_connect_to_sock; + write_unlock_bh(&sock->sk->sk_callback_lock); + /* Bind to all addresses. */ if (sctp_bind_addrs(con, dlm_config.ci_tcp_port)) goto create_delsock; diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index 87dbdd4..64026e5 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -23,6 +23,8 @@ * 02111-1307, USA. */ +#include <crypto/hash.h> +#include <crypto/skcipher.h> #include <linux/fs.h> #include <linux/mount.h> #include <linux/pagemap.h> @@ -30,7 +32,6 @@ #include <linux/compiler.h> #include <linux/key.h> #include <linux/namei.h> -#include <linux/crypto.h> #include <linux/file.h> #include <linux/scatterlist.h> #include <linux/slab.h> @@ -74,6 +75,19 @@ void ecryptfs_from_hex(char *dst, char *src, int dst_size) } } +static int ecryptfs_hash_digest(struct crypto_shash *tfm, + char *src, int len, char *dst) +{ + SHASH_DESC_ON_STACK(desc, tfm); + int err; + + desc->tfm = tfm; + desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; + err = crypto_shash_digest(desc, src, len, dst); + shash_desc_zero(desc); + return err; +} + /** * ecryptfs_calculate_md5 - calculates the md5 of @src * @dst: Pointer to 16 bytes of allocated memory @@ -88,45 +102,26 @@ static int ecryptfs_calculate_md5(char *dst, struct ecryptfs_crypt_stat *crypt_stat, char *src, int len) { - struct scatterlist sg; - struct hash_desc desc = { - .tfm = crypt_stat->hash_tfm, - .flags = CRYPTO_TFM_REQ_MAY_SLEEP - }; + struct crypto_shash *tfm; int rc = 0; mutex_lock(&crypt_stat->cs_hash_tfm_mutex); - sg_init_one(&sg, (u8 *)src, len); - if (!desc.tfm) { - desc.tfm = crypto_alloc_hash(ECRYPTFS_DEFAULT_HASH, 0, - CRYPTO_ALG_ASYNC); - if (IS_ERR(desc.tfm)) { - rc = PTR_ERR(desc.tfm); + tfm = crypt_stat->hash_tfm; + if (!tfm) { + tfm = crypto_alloc_shash(ECRYPTFS_DEFAULT_HASH, 0, 0); + if (IS_ERR(tfm)) { + rc = PTR_ERR(tfm); ecryptfs_printk(KERN_ERR, "Error attempting to " "allocate crypto context; rc = [%d]\n", rc); goto out; } - crypt_stat->hash_tfm = desc.tfm; - } - rc = crypto_hash_init(&desc); - if (rc) { - printk(KERN_ERR - "%s: Error initializing crypto hash; rc = [%d]\n", - __func__, rc); - goto out; + crypt_stat->hash_tfm = tfm; } - rc = crypto_hash_update(&desc, &sg, len); + rc = ecryptfs_hash_digest(tfm, src, len, dst); if (rc) { printk(KERN_ERR - "%s: Error updating crypto hash; rc = [%d]\n", - __func__, rc); - goto out; - } - rc = crypto_hash_final(&desc, dst); - if (rc) { - printk(KERN_ERR - "%s: Error finalizing crypto hash; rc = [%d]\n", + "%s: Error computing crypto hash; rc = [%d]\n", __func__, rc); goto out; } @@ -234,10 +229,8 @@ void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat) { struct ecryptfs_key_sig *key_sig, *key_sig_tmp; - if (crypt_stat->tfm) - crypto_free_ablkcipher(crypt_stat->tfm); - if (crypt_stat->hash_tfm) - crypto_free_hash(crypt_stat->hash_tfm); + crypto_free_skcipher(crypt_stat->tfm); + crypto_free_shash(crypt_stat->hash_tfm); list_for_each_entry_safe(key_sig, key_sig_tmp, &crypt_stat->keysig_list, crypt_stat_list) { list_del(&key_sig->crypt_stat_list); @@ -342,7 +335,7 @@ static int crypt_scatterlist(struct ecryptfs_crypt_stat *crypt_stat, struct scatterlist *src_sg, int size, unsigned char *iv, int op) { - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; struct extent_crypt_result ecr; int rc = 0; @@ -358,20 +351,20 @@ static int crypt_scatterlist(struct ecryptfs_crypt_stat *crypt_stat, init_completion(&ecr.completion); mutex_lock(&crypt_stat->cs_tfm_mutex); - req = ablkcipher_request_alloc(crypt_stat->tfm, GFP_NOFS); + req = skcipher_request_alloc(crypt_stat->tfm, GFP_NOFS); if (!req) { mutex_unlock(&crypt_stat->cs_tfm_mutex); rc = -ENOMEM; goto out; } - ablkcipher_request_set_callback(req, + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, extent_crypt_complete, &ecr); /* Consider doing this once, when the file is opened */ if (!(crypt_stat->flags & ECRYPTFS_KEY_SET)) { - rc = crypto_ablkcipher_setkey(crypt_stat->tfm, crypt_stat->key, - crypt_stat->key_size); + rc = crypto_skcipher_setkey(crypt_stat->tfm, crypt_stat->key, + crypt_stat->key_size); if (rc) { ecryptfs_printk(KERN_ERR, "Error setting key; rc = [%d]\n", @@ -383,9 +376,9 @@ static int crypt_scatterlist(struct ecryptfs_crypt_stat *crypt_stat, crypt_stat->flags |= ECRYPTFS_KEY_SET; } mutex_unlock(&crypt_stat->cs_tfm_mutex); - ablkcipher_request_set_crypt(req, src_sg, dst_sg, size, iv); - rc = op == ENCRYPT ? crypto_ablkcipher_encrypt(req) : - crypto_ablkcipher_decrypt(req); + skcipher_request_set_crypt(req, src_sg, dst_sg, size, iv); + rc = op == ENCRYPT ? crypto_skcipher_encrypt(req) : + crypto_skcipher_decrypt(req); if (rc == -EINPROGRESS || rc == -EBUSY) { struct extent_crypt_result *ecr = req->base.data; @@ -394,7 +387,7 @@ static int crypt_scatterlist(struct ecryptfs_crypt_stat *crypt_stat, reinit_completion(&ecr->completion); } out: - ablkcipher_request_free(req); + skcipher_request_free(req); return rc; } @@ -622,7 +615,7 @@ int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat) crypt_stat->cipher, "cbc"); if (rc) goto out_unlock; - crypt_stat->tfm = crypto_alloc_ablkcipher(full_alg_name, 0, 0); + crypt_stat->tfm = crypto_alloc_skcipher(full_alg_name, 0, 0); if (IS_ERR(crypt_stat->tfm)) { rc = PTR_ERR(crypt_stat->tfm); crypt_stat->tfm = NULL; @@ -631,7 +624,7 @@ int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat) full_alg_name); goto out_free; } - crypto_ablkcipher_set_flags(crypt_stat->tfm, CRYPTO_TFM_REQ_WEAK_KEY); + crypto_skcipher_set_flags(crypt_stat->tfm, CRYPTO_TFM_REQ_WEAK_KEY); rc = 0; out_free: kfree(full_alg_name); @@ -1589,7 +1582,7 @@ out: * event, regardless of whether this function succeeds for fails. */ static int -ecryptfs_process_key_cipher(struct crypto_blkcipher **key_tfm, +ecryptfs_process_key_cipher(struct crypto_skcipher **key_tfm, char *cipher_name, size_t *key_size) { char dummy_key[ECRYPTFS_MAX_KEY_BYTES]; @@ -1607,21 +1600,18 @@ ecryptfs_process_key_cipher(struct crypto_blkcipher **key_tfm, "ecb"); if (rc) goto out; - *key_tfm = crypto_alloc_blkcipher(full_alg_name, 0, CRYPTO_ALG_ASYNC); + *key_tfm = crypto_alloc_skcipher(full_alg_name, 0, CRYPTO_ALG_ASYNC); if (IS_ERR(*key_tfm)) { rc = PTR_ERR(*key_tfm); printk(KERN_ERR "Unable to allocate crypto cipher with name " "[%s]; rc = [%d]\n", full_alg_name, rc); goto out; } - crypto_blkcipher_set_flags(*key_tfm, CRYPTO_TFM_REQ_WEAK_KEY); - if (*key_size == 0) { - struct blkcipher_alg *alg = crypto_blkcipher_alg(*key_tfm); - - *key_size = alg->max_keysize; - } + crypto_skcipher_set_flags(*key_tfm, CRYPTO_TFM_REQ_WEAK_KEY); + if (*key_size == 0) + *key_size = crypto_skcipher_default_keysize(*key_tfm); get_random_bytes(dummy_key, *key_size); - rc = crypto_blkcipher_setkey(*key_tfm, dummy_key, *key_size); + rc = crypto_skcipher_setkey(*key_tfm, dummy_key, *key_size); if (rc) { printk(KERN_ERR "Error attempting to set key of size [%zd] for " "cipher [%s]; rc = [%d]\n", *key_size, full_alg_name, @@ -1658,8 +1648,7 @@ int ecryptfs_destroy_crypto(void) list_for_each_entry_safe(key_tfm, key_tfm_tmp, &key_tfm_list, key_tfm_list) { list_del(&key_tfm->key_tfm_list); - if (key_tfm->key_tfm) - crypto_free_blkcipher(key_tfm->key_tfm); + crypto_free_skcipher(key_tfm->key_tfm); kmem_cache_free(ecryptfs_key_tfm_cache, key_tfm); } mutex_unlock(&key_tfm_list_mutex); @@ -1745,7 +1734,7 @@ int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm) * Searches for cached item first, and creates new if not found. * Returns 0 on success, non-zero if adding new cipher failed */ -int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher **tfm, +int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_skcipher **tfm, struct mutex **tfm_mutex, char *cipher_name) { @@ -2111,7 +2100,7 @@ out: int ecryptfs_set_f_namelen(long *namelen, long lower_namelen, struct ecryptfs_mount_crypt_stat *mount_crypt_stat) { - struct blkcipher_desc desc; + struct crypto_skcipher *tfm; struct mutex *tfm_mutex; size_t cipher_blocksize; int rc; @@ -2121,7 +2110,7 @@ int ecryptfs_set_f_namelen(long *namelen, long lower_namelen, return 0; } - rc = ecryptfs_get_tfm_and_mutex_for_cipher_name(&desc.tfm, &tfm_mutex, + rc = ecryptfs_get_tfm_and_mutex_for_cipher_name(&tfm, &tfm_mutex, mount_crypt_stat->global_default_fn_cipher_name); if (unlikely(rc)) { (*namelen) = 0; @@ -2129,7 +2118,7 @@ int ecryptfs_set_f_namelen(long *namelen, long lower_namelen, } mutex_lock(tfm_mutex); - cipher_blocksize = crypto_blkcipher_blocksize(desc.tfm); + cipher_blocksize = crypto_skcipher_blocksize(tfm); mutex_unlock(tfm_mutex); /* Return an exact amount for the common cases */ diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h index 67e1612..d123fba 100644 --- a/fs/ecryptfs/ecryptfs_kernel.h +++ b/fs/ecryptfs/ecryptfs_kernel.h @@ -28,6 +28,7 @@ #ifndef ECRYPTFS_KERNEL_H #define ECRYPTFS_KERNEL_H +#include <crypto/skcipher.h> #include <keys/user-type.h> #include <keys/encrypted-type.h> #include <linux/fs.h> @@ -38,7 +39,6 @@ #include <linux/nsproxy.h> #include <linux/backing-dev.h> #include <linux/ecryptfs.h> -#include <linux/crypto.h> #define ECRYPTFS_DEFAULT_IV_BYTES 16 #define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096 @@ -233,9 +233,9 @@ struct ecryptfs_crypt_stat { size_t extent_shift; unsigned int extent_mask; struct ecryptfs_mount_crypt_stat *mount_crypt_stat; - struct crypto_ablkcipher *tfm; - struct crypto_hash *hash_tfm; /* Crypto context for generating - * the initialization vectors */ + struct crypto_skcipher *tfm; + struct crypto_shash *hash_tfm; /* Crypto context for generating + * the initialization vectors */ unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; unsigned char key[ECRYPTFS_MAX_KEY_BYTES]; unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES]; @@ -309,7 +309,7 @@ struct ecryptfs_global_auth_tok { * keeps a list of crypto API contexts around to use when needed. */ struct ecryptfs_key_tfm { - struct crypto_blkcipher *key_tfm; + struct crypto_skcipher *key_tfm; size_t key_size; struct mutex key_tfm_mutex; struct list_head key_tfm_list; @@ -658,7 +658,7 @@ ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name, int ecryptfs_init_crypto(void); int ecryptfs_destroy_crypto(void); int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm); -int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher **tfm, +int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_skcipher **tfm, struct mutex **tfm_mutex, char *cipher_name); int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key, diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index 2665163..121114e 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -29,7 +29,6 @@ #include <linux/dcache.h> #include <linux/namei.h> #include <linux/mount.h> -#include <linux/crypto.h> #include <linux/fs_stack.h> #include <linux/slab.h> #include <linux/xattr.h> diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c index 6bd67e2..c5c84df 100644 --- a/fs/ecryptfs/keystore.c +++ b/fs/ecryptfs/keystore.c @@ -25,11 +25,12 @@ * 02111-1307, USA. */ +#include <crypto/hash.h> +#include <crypto/skcipher.h> #include <linux/string.h> #include <linux/pagemap.h> #include <linux/key.h> #include <linux/random.h> -#include <linux/crypto.h> #include <linux/scatterlist.h> #include <linux/slab.h> #include "ecryptfs_kernel.h" @@ -601,12 +602,13 @@ struct ecryptfs_write_tag_70_packet_silly_stack { struct ecryptfs_auth_tok *auth_tok; struct scatterlist src_sg[2]; struct scatterlist dst_sg[2]; - struct blkcipher_desc desc; + struct crypto_skcipher *skcipher_tfm; + struct skcipher_request *skcipher_req; char iv[ECRYPTFS_MAX_IV_BYTES]; char hash[ECRYPTFS_TAG_70_DIGEST_SIZE]; char tmp_hash[ECRYPTFS_TAG_70_DIGEST_SIZE]; - struct hash_desc hash_desc; - struct scatterlist hash_sg; + struct crypto_shash *hash_tfm; + struct shash_desc *hash_desc; }; /** @@ -629,14 +631,13 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, struct key *auth_tok_key = NULL; int rc = 0; - s = kmalloc(sizeof(*s), GFP_KERNEL); + s = kzalloc(sizeof(*s), GFP_KERNEL); if (!s) { printk(KERN_ERR "%s: Out of memory whilst trying to kmalloc " "[%zd] bytes of kernel memory\n", __func__, sizeof(*s)); rc = -ENOMEM; goto out; } - s->desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; (*packet_size) = 0; rc = ecryptfs_find_auth_tok_for_sig( &auth_tok_key, @@ -649,7 +650,7 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, goto out; } rc = ecryptfs_get_tfm_and_mutex_for_cipher_name( - &s->desc.tfm, + &s->skcipher_tfm, &s->tfm_mutex, mount_crypt_stat->global_default_fn_cipher_name); if (unlikely(rc)) { printk(KERN_ERR "Internal error whilst attempting to get " @@ -658,7 +659,7 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, goto out; } mutex_lock(s->tfm_mutex); - s->block_size = crypto_blkcipher_blocksize(s->desc.tfm); + s->block_size = crypto_skcipher_blocksize(s->skcipher_tfm); /* Plus one for the \0 separator between the random prefix * and the plaintext filename */ s->num_rand_bytes = (ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES + 1); @@ -691,6 +692,19 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, rc = -EINVAL; goto out_unlock; } + + s->skcipher_req = skcipher_request_alloc(s->skcipher_tfm, GFP_KERNEL); + if (!s->skcipher_req) { + printk(KERN_ERR "%s: Out of kernel memory whilst attempting to " + "skcipher_request_alloc for %s\n", __func__, + crypto_skcipher_driver_name(s->skcipher_tfm)); + rc = -ENOMEM; + goto out_unlock; + } + + skcipher_request_set_callback(s->skcipher_req, + CRYPTO_TFM_REQ_MAY_SLEEP, NULL, NULL); + s->block_aligned_filename = kzalloc(s->block_aligned_filename_size, GFP_KERNEL); if (!s->block_aligned_filename) { @@ -700,7 +714,6 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, rc = -ENOMEM; goto out_unlock; } - s->i = 0; dest[s->i++] = ECRYPTFS_TAG_70_PACKET_TYPE; rc = ecryptfs_write_packet_length(&dest[s->i], (ECRYPTFS_SIG_SIZE @@ -738,40 +751,36 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, "password tokens\n", __func__); goto out_free_unlock; } - sg_init_one( - &s->hash_sg, - (u8 *)s->auth_tok->token.password.session_key_encryption_key, - s->auth_tok->token.password.session_key_encryption_key_bytes); - s->hash_desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; - s->hash_desc.tfm = crypto_alloc_hash(ECRYPTFS_TAG_70_DIGEST, 0, - CRYPTO_ALG_ASYNC); - if (IS_ERR(s->hash_desc.tfm)) { - rc = PTR_ERR(s->hash_desc.tfm); + s->hash_tfm = crypto_alloc_shash(ECRYPTFS_TAG_70_DIGEST, 0, 0); + if (IS_ERR(s->hash_tfm)) { + rc = PTR_ERR(s->hash_tfm); printk(KERN_ERR "%s: Error attempting to " "allocate hash crypto context; rc = [%d]\n", __func__, rc); goto out_free_unlock; } - rc = crypto_hash_init(&s->hash_desc); - if (rc) { - printk(KERN_ERR - "%s: Error initializing crypto hash; rc = [%d]\n", - __func__, rc); - goto out_release_free_unlock; - } - rc = crypto_hash_update( - &s->hash_desc, &s->hash_sg, - s->auth_tok->token.password.session_key_encryption_key_bytes); - if (rc) { - printk(KERN_ERR - "%s: Error updating crypto hash; rc = [%d]\n", - __func__, rc); + + s->hash_desc = kmalloc(sizeof(*s->hash_desc) + + crypto_shash_descsize(s->hash_tfm), GFP_KERNEL); + if (!s->hash_desc) { + printk(KERN_ERR "%s: Out of kernel memory whilst attempting to " + "kmalloc [%zd] bytes\n", __func__, + sizeof(*s->hash_desc) + + crypto_shash_descsize(s->hash_tfm)); + rc = -ENOMEM; goto out_release_free_unlock; } - rc = crypto_hash_final(&s->hash_desc, s->hash); + + s->hash_desc->tfm = s->hash_tfm; + s->hash_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; + + rc = crypto_shash_digest(s->hash_desc, + (u8 *)s->auth_tok->token.password.session_key_encryption_key, + s->auth_tok->token.password.session_key_encryption_key_bytes, + s->hash); if (rc) { printk(KERN_ERR - "%s: Error finalizing crypto hash; rc = [%d]\n", + "%s: Error computing crypto hash; rc = [%d]\n", __func__, rc); goto out_release_free_unlock; } @@ -780,27 +789,12 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, s->hash[(s->j % ECRYPTFS_TAG_70_DIGEST_SIZE)]; if ((s->j % ECRYPTFS_TAG_70_DIGEST_SIZE) == (ECRYPTFS_TAG_70_DIGEST_SIZE - 1)) { - sg_init_one(&s->hash_sg, (u8 *)s->hash, - ECRYPTFS_TAG_70_DIGEST_SIZE); - rc = crypto_hash_init(&s->hash_desc); - if (rc) { - printk(KERN_ERR - "%s: Error initializing crypto hash; " - "rc = [%d]\n", __func__, rc); - goto out_release_free_unlock; - } - rc = crypto_hash_update(&s->hash_desc, &s->hash_sg, - ECRYPTFS_TAG_70_DIGEST_SIZE); + rc = crypto_shash_digest(s->hash_desc, (u8 *)s->hash, + ECRYPTFS_TAG_70_DIGEST_SIZE, + s->tmp_hash); if (rc) { printk(KERN_ERR - "%s: Error updating crypto hash; " - "rc = [%d]\n", __func__, rc); - goto out_release_free_unlock; - } - rc = crypto_hash_final(&s->hash_desc, s->tmp_hash); - if (rc) { - printk(KERN_ERR - "%s: Error finalizing crypto hash; " + "%s: Error computing crypto hash; " "rc = [%d]\n", __func__, rc); goto out_release_free_unlock; } @@ -834,10 +828,8 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, * of the IV here, so we just use 0's for the IV. Note the * constraint that ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES * >= ECRYPTFS_MAX_IV_BYTES. */ - memset(s->iv, 0, ECRYPTFS_MAX_IV_BYTES); - s->desc.info = s->iv; - rc = crypto_blkcipher_setkey( - s->desc.tfm, + rc = crypto_skcipher_setkey( + s->skcipher_tfm, s->auth_tok->token.password.session_key_encryption_key, mount_crypt_stat->global_default_fn_cipher_key_bytes); if (rc < 0) { @@ -850,8 +842,9 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, mount_crypt_stat->global_default_fn_cipher_key_bytes); goto out_release_free_unlock; } - rc = crypto_blkcipher_encrypt_iv(&s->desc, s->dst_sg, s->src_sg, - s->block_aligned_filename_size); + skcipher_request_set_crypt(s->skcipher_req, s->src_sg, s->dst_sg, + s->block_aligned_filename_size, s->iv); + rc = crypto_skcipher_encrypt(s->skcipher_req); if (rc) { printk(KERN_ERR "%s: Error attempting to encrypt filename; " "rc = [%d]\n", __func__, rc); @@ -861,7 +854,7 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, (*packet_size) = s->i; (*remaining_bytes) -= (*packet_size); out_release_free_unlock: - crypto_free_hash(s->hash_desc.tfm); + crypto_free_shash(s->hash_tfm); out_free_unlock: kzfree(s->block_aligned_filename); out_unlock: @@ -871,6 +864,8 @@ out: up_write(&(auth_tok_key->sem)); key_put(auth_tok_key); } + skcipher_request_free(s->skcipher_req); + kzfree(s->hash_desc); kfree(s); return rc; } @@ -888,7 +883,8 @@ struct ecryptfs_parse_tag_70_packet_silly_stack { struct ecryptfs_auth_tok *auth_tok; struct scatterlist src_sg[2]; struct scatterlist dst_sg[2]; - struct blkcipher_desc desc; + struct crypto_skcipher *skcipher_tfm; + struct skcipher_request *skcipher_req; char fnek_sig_hex[ECRYPTFS_SIG_SIZE_HEX + 1]; char iv[ECRYPTFS_MAX_IV_BYTES]; char cipher_string[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; @@ -922,14 +918,13 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size, (*packet_size) = 0; (*filename_size) = 0; (*filename) = NULL; - s = kmalloc(sizeof(*s), GFP_KERNEL); + s = kzalloc(sizeof(*s), GFP_KERNEL); if (!s) { printk(KERN_ERR "%s: Out of memory whilst trying to kmalloc " "[%zd] bytes of kernel memory\n", __func__, sizeof(*s)); rc = -ENOMEM; goto out; } - s->desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; if (max_packet_size < ECRYPTFS_TAG_70_MIN_METADATA_SIZE) { printk(KERN_WARNING "%s: max_packet_size is [%zd]; it must be " "at least [%d]\n", __func__, max_packet_size, @@ -992,7 +987,7 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size, rc); goto out; } - rc = ecryptfs_get_tfm_and_mutex_for_cipher_name(&s->desc.tfm, + rc = ecryptfs_get_tfm_and_mutex_for_cipher_name(&s->skcipher_tfm, &s->tfm_mutex, s->cipher_string); if (unlikely(rc)) { @@ -1030,12 +1025,23 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size, __func__, rc, s->block_aligned_filename_size); goto out_free_unlock; } + + s->skcipher_req = skcipher_request_alloc(s->skcipher_tfm, GFP_KERNEL); + if (!s->skcipher_req) { + printk(KERN_ERR "%s: Out of kernel memory whilst attempting to " + "skcipher_request_alloc for %s\n", __func__, + crypto_skcipher_driver_name(s->skcipher_tfm)); + rc = -ENOMEM; + goto out_free_unlock; + } + + skcipher_request_set_callback(s->skcipher_req, + CRYPTO_TFM_REQ_MAY_SLEEP, NULL, NULL); + /* The characters in the first block effectively do the job of * the IV here, so we just use 0's for the IV. Note the * constraint that ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES * >= ECRYPTFS_MAX_IV_BYTES. */ - memset(s->iv, 0, ECRYPTFS_MAX_IV_BYTES); - s->desc.info = s->iv; /* TODO: Support other key modules than passphrase for * filename encryption */ if (s->auth_tok->token_type != ECRYPTFS_PASSWORD) { @@ -1044,8 +1050,8 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size, "password tokens\n", __func__); goto out_free_unlock; } - rc = crypto_blkcipher_setkey( - s->desc.tfm, + rc = crypto_skcipher_setkey( + s->skcipher_tfm, s->auth_tok->token.password.session_key_encryption_key, mount_crypt_stat->global_default_fn_cipher_key_bytes); if (rc < 0) { @@ -1058,14 +1064,14 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size, mount_crypt_stat->global_default_fn_cipher_key_bytes); goto out_free_unlock; } - rc = crypto_blkcipher_decrypt_iv(&s->desc, s->dst_sg, s->src_sg, - s->block_aligned_filename_size); + skcipher_request_set_crypt(s->skcipher_req, s->src_sg, s->dst_sg, + s->block_aligned_filename_size, s->iv); + rc = crypto_skcipher_decrypt(s->skcipher_req); if (rc) { printk(KERN_ERR "%s: Error attempting to decrypt filename; " "rc = [%d]\n", __func__, rc); goto out_free_unlock; } - s->i = 0; while (s->decrypted_filename[s->i] != '\0' && s->i < s->block_aligned_filename_size) s->i++; @@ -1108,6 +1114,7 @@ out: up_write(&(auth_tok_key->sem)); key_put(auth_tok_key); } + skcipher_request_free(s->skcipher_req); kfree(s); return rc; } @@ -1667,9 +1674,8 @@ decrypt_passphrase_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok, struct scatterlist dst_sg[2]; struct scatterlist src_sg[2]; struct mutex *tfm_mutex; - struct blkcipher_desc desc = { - .flags = CRYPTO_TFM_REQ_MAY_SLEEP - }; + struct crypto_skcipher *tfm; + struct skcipher_request *req = NULL; int rc = 0; if (unlikely(ecryptfs_verbosity > 0)) { @@ -1680,7 +1686,7 @@ decrypt_passphrase_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok, auth_tok->token.password.session_key_encryption_key, auth_tok->token.password.session_key_encryption_key_bytes); } - rc = ecryptfs_get_tfm_and_mutex_for_cipher_name(&desc.tfm, &tfm_mutex, + rc = ecryptfs_get_tfm_and_mutex_for_cipher_name(&tfm, &tfm_mutex, crypt_stat->cipher); if (unlikely(rc)) { printk(KERN_ERR "Internal error whilst attempting to get " @@ -1711,8 +1717,20 @@ decrypt_passphrase_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok, goto out; } mutex_lock(tfm_mutex); - rc = crypto_blkcipher_setkey( - desc.tfm, auth_tok->token.password.session_key_encryption_key, + req = skcipher_request_alloc(tfm, GFP_KERNEL); + if (!req) { + mutex_unlock(tfm_mutex); + printk(KERN_ERR "%s: Out of kernel memory whilst attempting to " + "skcipher_request_alloc for %s\n", __func__, + crypto_skcipher_driver_name(tfm)); + rc = -ENOMEM; + goto out; + } + + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP, + NULL, NULL); + rc = crypto_skcipher_setkey( + tfm, auth_tok->token.password.session_key_encryption_key, crypt_stat->key_size); if (unlikely(rc < 0)) { mutex_unlock(tfm_mutex); @@ -1720,8 +1738,10 @@ decrypt_passphrase_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok, rc = -EINVAL; goto out; } - rc = crypto_blkcipher_decrypt(&desc, dst_sg, src_sg, - auth_tok->session_key.encrypted_key_size); + skcipher_request_set_crypt(req, src_sg, dst_sg, + auth_tok->session_key.encrypted_key_size, + NULL); + rc = crypto_skcipher_decrypt(req); mutex_unlock(tfm_mutex); if (unlikely(rc)) { printk(KERN_ERR "Error decrypting; rc = [%d]\n", rc); @@ -1738,6 +1758,7 @@ decrypt_passphrase_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok, crypt_stat->key_size); } out: + skcipher_request_free(req); return rc; } @@ -2191,16 +2212,14 @@ write_tag_3_packet(char *dest, size_t *remaining_bytes, size_t max_packet_size; struct ecryptfs_mount_crypt_stat *mount_crypt_stat = crypt_stat->mount_crypt_stat; - struct blkcipher_desc desc = { - .tfm = NULL, - .flags = CRYPTO_TFM_REQ_MAY_SLEEP - }; + struct crypto_skcipher *tfm; + struct skcipher_request *req; int rc = 0; (*packet_size) = 0; ecryptfs_from_hex(key_rec->sig, auth_tok->token.password.signature, ECRYPTFS_SIG_SIZE); - rc = ecryptfs_get_tfm_and_mutex_for_cipher_name(&desc.tfm, &tfm_mutex, + rc = ecryptfs_get_tfm_and_mutex_for_cipher_name(&tfm, &tfm_mutex, crypt_stat->cipher); if (unlikely(rc)) { printk(KERN_ERR "Internal error whilst attempting to get " @@ -2209,12 +2228,11 @@ write_tag_3_packet(char *dest, size_t *remaining_bytes, goto out; } if (mount_crypt_stat->global_default_cipher_key_size == 0) { - struct blkcipher_alg *alg = crypto_blkcipher_alg(desc.tfm); - printk(KERN_WARNING "No key size specified at mount; " - "defaulting to [%d]\n", alg->max_keysize); + "defaulting to [%d]\n", + crypto_skcipher_default_keysize(tfm)); mount_crypt_stat->global_default_cipher_key_size = - alg->max_keysize; + crypto_skcipher_default_keysize(tfm); } if (crypt_stat->key_size == 0) crypt_stat->key_size = @@ -2284,20 +2302,36 @@ write_tag_3_packet(char *dest, size_t *remaining_bytes, goto out; } mutex_lock(tfm_mutex); - rc = crypto_blkcipher_setkey(desc.tfm, session_key_encryption_key, - crypt_stat->key_size); + rc = crypto_skcipher_setkey(tfm, session_key_encryption_key, + crypt_stat->key_size); if (rc < 0) { mutex_unlock(tfm_mutex); ecryptfs_printk(KERN_ERR, "Error setting key for crypto " "context; rc = [%d]\n", rc); goto out; } + + req = skcipher_request_alloc(tfm, GFP_KERNEL); + if (!req) { + mutex_unlock(tfm_mutex); + ecryptfs_printk(KERN_ERR, "Out of kernel memory whilst " + "attempting to skcipher_request_alloc for " + "%s\n", crypto_skcipher_driver_name(tfm)); + rc = -ENOMEM; + goto out; + } + + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP, + NULL, NULL); + rc = 0; ecryptfs_printk(KERN_DEBUG, "Encrypting [%zd] bytes of the key\n", crypt_stat->key_size); - rc = crypto_blkcipher_encrypt(&desc, dst_sg, src_sg, - (*key_rec).enc_key_size); + skcipher_request_set_crypt(req, src_sg, dst_sg, + (*key_rec).enc_key_size, NULL); + rc = crypto_skcipher_encrypt(req); mutex_unlock(tfm_mutex); + skcipher_request_free(req); if (rc) { printk(KERN_ERR "Error encrypting; rc = [%d]\n", rc); goto out; diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c index e25b6b0..8b0b4a7 100644 --- a/fs/ecryptfs/main.c +++ b/fs/ecryptfs/main.c @@ -29,7 +29,6 @@ #include <linux/module.h> #include <linux/namei.h> #include <linux/skbuff.h> -#include <linux/crypto.h> #include <linux/mount.h> #include <linux/pagemap.h> #include <linux/key.h> diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c index c6ced4c..1f58652 100644 --- a/fs/ecryptfs/mmap.c +++ b/fs/ecryptfs/mmap.c @@ -30,7 +30,6 @@ #include <linux/page-flags.h> #include <linux/mount.h> #include <linux/file.h> -#include <linux/crypto.h> #include <linux/scatterlist.h> #include <linux/slab.h> #include <asm/unaligned.h> diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c index afa1b81..77a486d 100644 --- a/fs/ecryptfs/super.c +++ b/fs/ecryptfs/super.c @@ -29,7 +29,6 @@ #include <linux/slab.h> #include <linux/seq_file.h> #include <linux/file.h> -#include <linux/crypto.h> #include <linux/statfs.h> #include <linux/magic.h> #include "ecryptfs_kernel.h" diff --git a/fs/efivarfs/file.c b/fs/efivarfs/file.c index c424e48..d48e0d2 100644 --- a/fs/efivarfs/file.c +++ b/fs/efivarfs/file.c @@ -10,6 +10,7 @@ #include <linux/efi.h> #include <linux/fs.h> #include <linux/slab.h> +#include <linux/mount.h> #include "internal.h" @@ -103,9 +104,78 @@ out_free: return size; } +static int +efivarfs_ioc_getxflags(struct file *file, void __user *arg) +{ + struct inode *inode = file->f_mapping->host; + unsigned int i_flags; + unsigned int flags = 0; + + i_flags = inode->i_flags; + if (i_flags & S_IMMUTABLE) + flags |= FS_IMMUTABLE_FL; + + if (copy_to_user(arg, &flags, sizeof(flags))) + return -EFAULT; + return 0; +} + +static int +efivarfs_ioc_setxflags(struct file *file, void __user *arg) +{ + struct inode *inode = file->f_mapping->host; + unsigned int flags; + unsigned int i_flags = 0; + int error; + + if (!inode_owner_or_capable(inode)) + return -EACCES; + + if (copy_from_user(&flags, arg, sizeof(flags))) + return -EFAULT; + + if (flags & ~FS_IMMUTABLE_FL) + return -EOPNOTSUPP; + + if (!capable(CAP_LINUX_IMMUTABLE)) + return -EPERM; + + if (flags & FS_IMMUTABLE_FL) + i_flags |= S_IMMUTABLE; + + + error = mnt_want_write_file(file); + if (error) + return error; + + inode_lock(inode); + inode_set_flags(inode, i_flags, S_IMMUTABLE); + inode_unlock(inode); + + mnt_drop_write_file(file); + + return 0; +} + +long +efivarfs_file_ioctl(struct file *file, unsigned int cmd, unsigned long p) +{ + void __user *arg = (void __user *)p; + + switch (cmd) { + case FS_IOC_GETFLAGS: + return efivarfs_ioc_getxflags(file, arg); + case FS_IOC_SETFLAGS: + return efivarfs_ioc_setxflags(file, arg); + } + + return -ENOTTY; +} + const struct file_operations efivarfs_file_operations = { .open = simple_open, .read = efivarfs_file_read, .write = efivarfs_file_write, .llseek = no_llseek, + .unlocked_ioctl = efivarfs_file_ioctl, }; diff --git a/fs/efivarfs/inode.c b/fs/efivarfs/inode.c index 3381b9d..e2ab6d0 100644 --- a/fs/efivarfs/inode.c +++ b/fs/efivarfs/inode.c @@ -15,7 +15,8 @@ #include "internal.h" struct inode *efivarfs_get_inode(struct super_block *sb, - const struct inode *dir, int mode, dev_t dev) + const struct inode *dir, int mode, + dev_t dev, bool is_removable) { struct inode *inode = new_inode(sb); @@ -23,6 +24,7 @@ struct inode *efivarfs_get_inode(struct super_block *sb, inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; + inode->i_flags = is_removable ? 0 : S_IMMUTABLE; switch (mode & S_IFMT) { case S_IFREG: inode->i_fop = &efivarfs_file_operations; @@ -102,22 +104,17 @@ static void efivarfs_hex_to_guid(const char *str, efi_guid_t *guid) static int efivarfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl) { - struct inode *inode; + struct inode *inode = NULL; struct efivar_entry *var; int namelen, i = 0, err = 0; + bool is_removable = false; if (!efivarfs_valid_name(dentry->d_name.name, dentry->d_name.len)) return -EINVAL; - inode = efivarfs_get_inode(dir->i_sb, dir, mode, 0); - if (!inode) - return -ENOMEM; - var = kzalloc(sizeof(struct efivar_entry), GFP_KERNEL); - if (!var) { - err = -ENOMEM; - goto out; - } + if (!var) + return -ENOMEM; /* length of the variable name itself: remove GUID and separator */ namelen = dentry->d_name.len - EFI_VARIABLE_GUID_LEN - 1; @@ -125,6 +122,16 @@ static int efivarfs_create(struct inode *dir, struct dentry *dentry, efivarfs_hex_to_guid(dentry->d_name.name + namelen + 1, &var->var.VendorGuid); + if (efivar_variable_is_removable(var->var.VendorGuid, + dentry->d_name.name, namelen)) + is_removable = true; + + inode = efivarfs_get_inode(dir->i_sb, dir, mode, 0, is_removable); + if (!inode) { + err = -ENOMEM; + goto out; + } + for (i = 0; i < namelen; i++) var->var.VariableName[i] = dentry->d_name.name[i]; @@ -138,7 +145,8 @@ static int efivarfs_create(struct inode *dir, struct dentry *dentry, out: if (err) { kfree(var); - iput(inode); + if (inode) + iput(inode); } return err; } diff --git a/fs/efivarfs/internal.h b/fs/efivarfs/internal.h index b5ff16a..b450518 100644 --- a/fs/efivarfs/internal.h +++ b/fs/efivarfs/internal.h @@ -15,7 +15,8 @@ extern const struct file_operations efivarfs_file_operations; extern const struct inode_operations efivarfs_dir_inode_operations; extern bool efivarfs_valid_name(const char *str, int len); extern struct inode *efivarfs_get_inode(struct super_block *sb, - const struct inode *dir, int mode, dev_t dev); + const struct inode *dir, int mode, dev_t dev, + bool is_removable); extern struct list_head efivarfs_list; diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c index b8a564f..dd029d1 100644 --- a/fs/efivarfs/super.c +++ b/fs/efivarfs/super.c @@ -118,8 +118,9 @@ static int efivarfs_callback(efi_char16_t *name16, efi_guid_t vendor, struct dentry *dentry, *root = sb->s_root; unsigned long size = 0; char *name; - int len, i; + int len; int err = -ENOMEM; + bool is_removable = false; entry = kzalloc(sizeof(*entry), GFP_KERNEL); if (!entry) @@ -128,15 +129,17 @@ static int efivarfs_callback(efi_char16_t *name16, efi_guid_t vendor, memcpy(entry->var.VariableName, name16, name_size); memcpy(&(entry->var.VendorGuid), &vendor, sizeof(efi_guid_t)); - len = ucs2_strlen(entry->var.VariableName); + len = ucs2_utf8size(entry->var.VariableName); /* name, plus '-', plus GUID, plus NUL*/ name = kmalloc(len + 1 + EFI_VARIABLE_GUID_LEN + 1, GFP_KERNEL); if (!name) goto fail; - for (i = 0; i < len; i++) - name[i] = entry->var.VariableName[i] & 0xFF; + ucs2_as_utf8(name, entry->var.VariableName, len); + + if (efivar_variable_is_removable(entry->var.VendorGuid, name, len)) + is_removable = true; name[len] = '-'; @@ -144,7 +147,8 @@ static int efivarfs_callback(efi_char16_t *name16, efi_guid_t vendor, name[len + EFI_VARIABLE_GUID_LEN+1] = '\0'; - inode = efivarfs_get_inode(sb, d_inode(root), S_IFREG | 0644, 0); + inode = efivarfs_get_inode(sb, d_inode(root), S_IFREG | 0644, 0, + is_removable); if (!inode) goto fail_name; @@ -200,7 +204,7 @@ static int efivarfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_d_op = &efivarfs_d_ops; sb->s_time_gran = 1; - inode = efivarfs_get_inode(sb, NULL, S_IFDIR | 0755, 0); + inode = efivarfs_get_inode(sb, NULL, S_IFDIR | 0755, 0, true); if (!inode) return -ENOMEM; inode->i_op = &efivarfs_dir_inode_operations; diff --git a/fs/eventpoll.c b/fs/eventpoll.c index cde6074..8a74a2a 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -1616,7 +1616,7 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events, { int res = 0, eavail, timed_out = 0; unsigned long flags; - long slack = 0; + u64 slack = 0; wait_queue_t wait; ktime_t expires, *to = NULL; @@ -56,6 +56,7 @@ #include <linux/pipe_fs_i.h> #include <linux/oom.h> #include <linux/compat.h> +#include <linux/vmalloc.h> #include <asm/uaccess.h> #include <asm/mmu_context.h> @@ -831,6 +832,97 @@ int kernel_read(struct file *file, loff_t offset, EXPORT_SYMBOL(kernel_read); +int kernel_read_file(struct file *file, void **buf, loff_t *size, + loff_t max_size, enum kernel_read_file_id id) +{ + loff_t i_size, pos; + ssize_t bytes = 0; + int ret; + + if (!S_ISREG(file_inode(file)->i_mode) || max_size < 0) + return -EINVAL; + + ret = security_kernel_read_file(file, id); + if (ret) + return ret; + + i_size = i_size_read(file_inode(file)); + if (max_size > 0 && i_size > max_size) + return -EFBIG; + if (i_size <= 0) + return -EINVAL; + + *buf = vmalloc(i_size); + if (!*buf) + return -ENOMEM; + + pos = 0; + while (pos < i_size) { + bytes = kernel_read(file, pos, (char *)(*buf) + pos, + i_size - pos); + if (bytes < 0) { + ret = bytes; + goto out; + } + + if (bytes == 0) + break; + pos += bytes; + } + + if (pos != i_size) { + ret = -EIO; + goto out; + } + + ret = security_kernel_post_read_file(file, *buf, i_size, id); + if (!ret) + *size = pos; + +out: + if (ret < 0) { + vfree(*buf); + *buf = NULL; + } + return ret; +} +EXPORT_SYMBOL_GPL(kernel_read_file); + +int kernel_read_file_from_path(char *path, void **buf, loff_t *size, + loff_t max_size, enum kernel_read_file_id id) +{ + struct file *file; + int ret; + + if (!path || !*path) + return -EINVAL; + + file = filp_open(path, O_RDONLY, 0); + if (IS_ERR(file)) + return PTR_ERR(file); + + ret = kernel_read_file(file, buf, size, max_size, id); + fput(file); + return ret; +} +EXPORT_SYMBOL_GPL(kernel_read_file_from_path); + +int kernel_read_file_from_fd(int fd, void **buf, loff_t *size, loff_t max_size, + enum kernel_read_file_id id) +{ + struct fd f = fdget(fd); + int ret = -EBADF; + + if (!f.file) + goto out; + + ret = kernel_read_file(f.file, buf, size, max_size, id); +out: + fdput(f); + return ret; +} +EXPORT_SYMBOL_GPL(kernel_read_file_from_fd); + ssize_t read_code(struct file *file, unsigned long addr, loff_t pos, size_t len) { ssize_t res = vfs_read(file, (void __user *)addr, len, &pos); diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h index 4c69c94..170939f 100644 --- a/fs/ext2/ext2.h +++ b/fs/ext2/ext2.h @@ -61,6 +61,8 @@ struct ext2_block_alloc_info { #define rsv_start rsv_window._rsv_start #define rsv_end rsv_window._rsv_end +struct mb_cache; + /* * second extended-fs super-block data in memory */ @@ -111,6 +113,7 @@ struct ext2_sb_info { * of the mount options. */ spinlock_t s_lock; + struct mb_cache *s_mb_cache; }; static inline spinlock_t * diff --git a/fs/ext2/file.c b/fs/ext2/file.c index 2c88d68..c1400b1 100644 --- a/fs/ext2/file.c +++ b/fs/ext2/file.c @@ -80,23 +80,6 @@ static int ext2_dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr, return ret; } -static int ext2_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) -{ - struct inode *inode = file_inode(vma->vm_file); - struct ext2_inode_info *ei = EXT2_I(inode); - int ret; - - sb_start_pagefault(inode->i_sb); - file_update_time(vma->vm_file); - down_read(&ei->dax_sem); - - ret = __dax_mkwrite(vma, vmf, ext2_get_block, NULL); - - up_read(&ei->dax_sem); - sb_end_pagefault(inode->i_sb); - return ret; -} - static int ext2_dax_pfn_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) { @@ -124,7 +107,7 @@ static int ext2_dax_pfn_mkwrite(struct vm_area_struct *vma, static const struct vm_operations_struct ext2_dax_vm_ops = { .fault = ext2_dax_fault, .pmd_fault = ext2_dax_pmd_fault, - .page_mkwrite = ext2_dax_mkwrite, + .page_mkwrite = ext2_dax_fault, .pfn_mkwrite = ext2_dax_pfn_mkwrite, }; diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 338eefd..6bd58e6 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -737,8 +737,10 @@ static int ext2_get_blocks(struct inode *inode, * so that it's not found by another thread before it's * initialised */ - err = dax_clear_blocks(inode, le32_to_cpu(chain[depth-1].key), - 1 << inode->i_blkbits); + err = dax_clear_sectors(inode->i_sb->s_bdev, + le32_to_cpu(chain[depth-1].key) << + (inode->i_blkbits - 9), + 1 << inode->i_blkbits); if (err) { mutex_unlock(&ei->truncate_mutex); goto cleanup; @@ -874,6 +876,14 @@ ext2_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset) static int ext2_writepages(struct address_space *mapping, struct writeback_control *wbc) { +#ifdef CONFIG_FS_DAX + if (dax_mapping(mapping)) { + return dax_writeback_mapping_range(mapping, + mapping->host->i_sb->s_bdev, + wbc); + } +#endif + return mpage_writepages(mapping, wbc, ext2_get_block); } @@ -1296,7 +1306,7 @@ void ext2_set_inode_flags(struct inode *inode) inode->i_flags |= S_NOATIME; if (flags & EXT2_DIRSYNC_FL) inode->i_flags |= S_DIRSYNC; - if (test_opt(inode->i_sb, DAX)) + if (test_opt(inode->i_sb, DAX) && S_ISREG(inode->i_mode)) inode->i_flags |= S_DAX; } diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 2a18841..b78caf2 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -131,7 +131,10 @@ static void ext2_put_super (struct super_block * sb) dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); - ext2_xattr_put_super(sb); + if (sbi->s_mb_cache) { + ext2_xattr_destroy_cache(sbi->s_mb_cache); + sbi->s_mb_cache = NULL; + } if (!(sb->s_flags & MS_RDONLY)) { struct ext2_super_block *es = sbi->s_es; @@ -1104,6 +1107,14 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) ext2_msg(sb, KERN_ERR, "error: insufficient memory"); goto failed_mount3; } + +#ifdef CONFIG_EXT2_FS_XATTR + sbi->s_mb_cache = ext2_xattr_create_cache(); + if (!sbi->s_mb_cache) { + ext2_msg(sb, KERN_ERR, "Failed to create an mb_cache"); + goto failed_mount3; + } +#endif /* * set up enough so that it can read an inode */ @@ -1149,6 +1160,8 @@ cantfind_ext2: sb->s_id); goto failed_mount; failed_mount3: + if (sbi->s_mb_cache) + ext2_xattr_destroy_cache(sbi->s_mb_cache); percpu_counter_destroy(&sbi->s_freeblocks_counter); percpu_counter_destroy(&sbi->s_freeinodes_counter); percpu_counter_destroy(&sbi->s_dirs_counter); @@ -1555,20 +1568,17 @@ MODULE_ALIAS_FS("ext2"); static int __init init_ext2_fs(void) { - int err = init_ext2_xattr(); - if (err) - return err; + int err; + err = init_inodecache(); if (err) - goto out1; + return err; err = register_filesystem(&ext2_fs_type); if (err) goto out; return 0; out: destroy_inodecache(); -out1: - exit_ext2_xattr(); return err; } @@ -1576,7 +1586,6 @@ static void __exit exit_ext2_fs(void) { unregister_filesystem(&ext2_fs_type); destroy_inodecache(); - exit_ext2_xattr(); } MODULE_AUTHOR("Remy Card and others"); diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c index f57a7ab..1a5e3bf 100644 --- a/fs/ext2/xattr.c +++ b/fs/ext2/xattr.c @@ -90,14 +90,12 @@ static int ext2_xattr_set2(struct inode *, struct buffer_head *, struct ext2_xattr_header *); -static int ext2_xattr_cache_insert(struct buffer_head *); +static int ext2_xattr_cache_insert(struct mb_cache *, struct buffer_head *); static struct buffer_head *ext2_xattr_cache_find(struct inode *, struct ext2_xattr_header *); static void ext2_xattr_rehash(struct ext2_xattr_header *, struct ext2_xattr_entry *); -static struct mb_cache *ext2_xattr_cache; - static const struct xattr_handler *ext2_xattr_handler_map[] = { [EXT2_XATTR_INDEX_USER] = &ext2_xattr_user_handler, #ifdef CONFIG_EXT2_FS_POSIX_ACL @@ -152,6 +150,7 @@ ext2_xattr_get(struct inode *inode, int name_index, const char *name, size_t name_len, size; char *end; int error; + struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld", name_index, name, buffer, (long)buffer_size); @@ -196,7 +195,7 @@ bad_block: ext2_error(inode->i_sb, "ext2_xattr_get", goto found; entry = next; } - if (ext2_xattr_cache_insert(bh)) + if (ext2_xattr_cache_insert(ext2_mb_cache, bh)) ea_idebug(inode, "cache insert failed"); error = -ENODATA; goto cleanup; @@ -209,7 +208,7 @@ found: le16_to_cpu(entry->e_value_offs) + size > inode->i_sb->s_blocksize) goto bad_block; - if (ext2_xattr_cache_insert(bh)) + if (ext2_xattr_cache_insert(ext2_mb_cache, bh)) ea_idebug(inode, "cache insert failed"); if (buffer) { error = -ERANGE; @@ -247,6 +246,7 @@ ext2_xattr_list(struct dentry *dentry, char *buffer, size_t buffer_size) char *end; size_t rest = buffer_size; int error; + struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; ea_idebug(inode, "buffer=%p, buffer_size=%ld", buffer, (long)buffer_size); @@ -281,7 +281,7 @@ bad_block: ext2_error(inode->i_sb, "ext2_xattr_list", goto bad_block; entry = next; } - if (ext2_xattr_cache_insert(bh)) + if (ext2_xattr_cache_insert(ext2_mb_cache, bh)) ea_idebug(inode, "cache insert failed"); /* list the attribute names */ @@ -483,22 +483,23 @@ bad_block: ext2_error(sb, "ext2_xattr_set", /* Here we know that we can set the new attribute. */ if (header) { - struct mb_cache_entry *ce; - /* assert(header == HDR(bh)); */ - ce = mb_cache_entry_get(ext2_xattr_cache, bh->b_bdev, - bh->b_blocknr); lock_buffer(bh); if (header->h_refcount == cpu_to_le32(1)) { + __u32 hash = le32_to_cpu(header->h_hash); + ea_bdebug(bh, "modifying in-place"); - if (ce) - mb_cache_entry_free(ce); + /* + * This must happen under buffer lock for + * ext2_xattr_set2() to reliably detect modified block + */ + mb_cache_entry_delete_block(EXT2_SB(sb)->s_mb_cache, + hash, bh->b_blocknr); + /* keep the buffer locked while modifying it. */ } else { int offset; - if (ce) - mb_cache_entry_release(ce); unlock_buffer(bh); ea_bdebug(bh, "cloning"); header = kmalloc(bh->b_size, GFP_KERNEL); @@ -626,6 +627,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, struct super_block *sb = inode->i_sb; struct buffer_head *new_bh = NULL; int error; + struct mb_cache *ext2_mb_cache = EXT2_SB(sb)->s_mb_cache; if (header) { new_bh = ext2_xattr_cache_find(inode, header); @@ -653,7 +655,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, don't need to change the reference count. */ new_bh = old_bh; get_bh(new_bh); - ext2_xattr_cache_insert(new_bh); + ext2_xattr_cache_insert(ext2_mb_cache, new_bh); } else { /* We need to allocate a new block */ ext2_fsblk_t goal = ext2_group_first_block_no(sb, @@ -674,7 +676,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, memcpy(new_bh->b_data, header, new_bh->b_size); set_buffer_uptodate(new_bh); unlock_buffer(new_bh); - ext2_xattr_cache_insert(new_bh); + ext2_xattr_cache_insert(ext2_mb_cache, new_bh); ext2_xattr_update_super_block(sb); } @@ -707,19 +709,21 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, error = 0; if (old_bh && old_bh != new_bh) { - struct mb_cache_entry *ce; - /* * If there was an old block and we are no longer using it, * release the old block. */ - ce = mb_cache_entry_get(ext2_xattr_cache, old_bh->b_bdev, - old_bh->b_blocknr); lock_buffer(old_bh); if (HDR(old_bh)->h_refcount == cpu_to_le32(1)) { + __u32 hash = le32_to_cpu(HDR(old_bh)->h_hash); + + /* + * This must happen under buffer lock for + * ext2_xattr_set2() to reliably detect freed block + */ + mb_cache_entry_delete_block(ext2_mb_cache, + hash, old_bh->b_blocknr); /* Free the old block. */ - if (ce) - mb_cache_entry_free(ce); ea_bdebug(old_bh, "freeing"); ext2_free_blocks(inode, old_bh->b_blocknr, 1); mark_inode_dirty(inode); @@ -730,8 +734,6 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, } else { /* Decrement the refcount only. */ le32_add_cpu(&HDR(old_bh)->h_refcount, -1); - if (ce) - mb_cache_entry_release(ce); dquot_free_block_nodirty(inode, 1); mark_inode_dirty(inode); mark_buffer_dirty(old_bh); @@ -757,7 +759,6 @@ void ext2_xattr_delete_inode(struct inode *inode) { struct buffer_head *bh = NULL; - struct mb_cache_entry *ce; down_write(&EXT2_I(inode)->xattr_sem); if (!EXT2_I(inode)->i_file_acl) @@ -777,19 +778,22 @@ ext2_xattr_delete_inode(struct inode *inode) EXT2_I(inode)->i_file_acl); goto cleanup; } - ce = mb_cache_entry_get(ext2_xattr_cache, bh->b_bdev, bh->b_blocknr); lock_buffer(bh); if (HDR(bh)->h_refcount == cpu_to_le32(1)) { - if (ce) - mb_cache_entry_free(ce); + __u32 hash = le32_to_cpu(HDR(bh)->h_hash); + + /* + * This must happen under buffer lock for ext2_xattr_set2() to + * reliably detect freed block + */ + mb_cache_entry_delete_block(EXT2_SB(inode->i_sb)->s_mb_cache, + hash, bh->b_blocknr); ext2_free_blocks(inode, EXT2_I(inode)->i_file_acl, 1); get_bh(bh); bforget(bh); unlock_buffer(bh); } else { le32_add_cpu(&HDR(bh)->h_refcount, -1); - if (ce) - mb_cache_entry_release(ce); ea_bdebug(bh, "refcount now=%d", le32_to_cpu(HDR(bh)->h_refcount)); unlock_buffer(bh); @@ -806,18 +810,6 @@ cleanup: } /* - * ext2_xattr_put_super() - * - * This is called when a file system is unmounted. - */ -void -ext2_xattr_put_super(struct super_block *sb) -{ - mb_cache_shrink(sb->s_bdev); -} - - -/* * ext2_xattr_cache_insert() * * Create a new entry in the extended attribute cache, and insert @@ -826,28 +818,20 @@ ext2_xattr_put_super(struct super_block *sb) * Returns 0, or a negative error number on failure. */ static int -ext2_xattr_cache_insert(struct buffer_head *bh) +ext2_xattr_cache_insert(struct mb_cache *cache, struct buffer_head *bh) { __u32 hash = le32_to_cpu(HDR(bh)->h_hash); - struct mb_cache_entry *ce; int error; - ce = mb_cache_entry_alloc(ext2_xattr_cache, GFP_NOFS); - if (!ce) - return -ENOMEM; - error = mb_cache_entry_insert(ce, bh->b_bdev, bh->b_blocknr, hash); + error = mb_cache_entry_create(cache, GFP_NOFS, hash, bh->b_blocknr, 1); if (error) { - mb_cache_entry_free(ce); if (error == -EBUSY) { ea_bdebug(bh, "already in cache (%d cache entries)", atomic_read(&ext2_xattr_cache->c_entry_count)); error = 0; } - } else { - ea_bdebug(bh, "inserting [%x] (%d cache entries)", (int)hash, - atomic_read(&ext2_xattr_cache->c_entry_count)); - mb_cache_entry_release(ce); - } + } else + ea_bdebug(bh, "inserting [%x]", (int)hash); return error; } @@ -904,22 +888,16 @@ ext2_xattr_cache_find(struct inode *inode, struct ext2_xattr_header *header) { __u32 hash = le32_to_cpu(header->h_hash); struct mb_cache_entry *ce; + struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; if (!header->h_hash) return NULL; /* never share */ ea_idebug(inode, "looking for cached blocks [%x]", (int)hash); again: - ce = mb_cache_entry_find_first(ext2_xattr_cache, inode->i_sb->s_bdev, - hash); + ce = mb_cache_entry_find_first(ext2_mb_cache, hash); while (ce) { struct buffer_head *bh; - if (IS_ERR(ce)) { - if (PTR_ERR(ce) == -EAGAIN) - goto again; - break; - } - bh = sb_bread(inode->i_sb, ce->e_block); if (!bh) { ext2_error(inode->i_sb, "ext2_xattr_cache_find", @@ -927,7 +905,21 @@ again: inode->i_ino, (unsigned long) ce->e_block); } else { lock_buffer(bh); - if (le32_to_cpu(HDR(bh)->h_refcount) > + /* + * We have to be careful about races with freeing or + * rehashing of xattr block. Once we hold buffer lock + * xattr block's state is stable so we can check + * whether the block got freed / rehashed or not. + * Since we unhash mbcache entry under buffer lock when + * freeing / rehashing xattr block, checking whether + * entry is still hashed is reliable. + */ + if (hlist_bl_unhashed(&ce->e_hash_list)) { + mb_cache_entry_put(ext2_mb_cache, ce); + unlock_buffer(bh); + brelse(bh); + goto again; + } else if (le32_to_cpu(HDR(bh)->h_refcount) > EXT2_XATTR_REFCOUNT_MAX) { ea_idebug(inode, "block %ld refcount %d>%d", (unsigned long) ce->e_block, @@ -936,13 +928,14 @@ again: } else if (!ext2_xattr_cmp(header, HDR(bh))) { ea_bdebug(bh, "b_count=%d", atomic_read(&(bh->b_count))); - mb_cache_entry_release(ce); + mb_cache_entry_touch(ext2_mb_cache, ce); + mb_cache_entry_put(ext2_mb_cache, ce); return bh; } unlock_buffer(bh); brelse(bh); } - ce = mb_cache_entry_find_next(ce, inode->i_sb->s_bdev, hash); + ce = mb_cache_entry_find_next(ext2_mb_cache, ce); } return NULL; } @@ -1015,17 +1008,15 @@ static void ext2_xattr_rehash(struct ext2_xattr_header *header, #undef BLOCK_HASH_SHIFT -int __init -init_ext2_xattr(void) +#define HASH_BUCKET_BITS 10 + +struct mb_cache *ext2_xattr_create_cache(void) { - ext2_xattr_cache = mb_cache_create("ext2_xattr", 6); - if (!ext2_xattr_cache) - return -ENOMEM; - return 0; + return mb_cache_create(HASH_BUCKET_BITS); } -void -exit_ext2_xattr(void) +void ext2_xattr_destroy_cache(struct mb_cache *cache) { - mb_cache_destroy(ext2_xattr_cache); + if (cache) + mb_cache_destroy(cache); } diff --git a/fs/ext2/xattr.h b/fs/ext2/xattr.h index 60edf29..6f82ab1 100644 --- a/fs/ext2/xattr.h +++ b/fs/ext2/xattr.h @@ -53,6 +53,8 @@ struct ext2_xattr_entry { #define EXT2_XATTR_SIZE(size) \ (((size) + EXT2_XATTR_ROUND) & ~EXT2_XATTR_ROUND) +struct mb_cache; + # ifdef CONFIG_EXT2_FS_XATTR extern const struct xattr_handler ext2_xattr_user_handler; @@ -65,10 +67,9 @@ extern int ext2_xattr_get(struct inode *, int, const char *, void *, size_t); extern int ext2_xattr_set(struct inode *, int, const char *, const void *, size_t, int); extern void ext2_xattr_delete_inode(struct inode *); -extern void ext2_xattr_put_super(struct super_block *); -extern int init_ext2_xattr(void); -extern void exit_ext2_xattr(void); +extern struct mb_cache *ext2_xattr_create_cache(void); +extern void ext2_xattr_destroy_cache(struct mb_cache *cache); extern const struct xattr_handler *ext2_xattr_handlers[]; @@ -93,19 +94,7 @@ ext2_xattr_delete_inode(struct inode *inode) { } -static inline void -ext2_xattr_put_super(struct super_block *sb) -{ -} - -static inline int -init_ext2_xattr(void) -{ - return 0; -} - -static inline void -exit_ext2_xattr(void) +static inline void ext2_xattr_destroy_cache(struct mb_cache *cache) { } diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c index ec0668a..fe1f50f 100644 --- a/fs/ext4/balloc.c +++ b/fs/ext4/balloc.c @@ -191,7 +191,6 @@ static int ext4_init_block_bitmap(struct super_block *sb, /* If checksum is bad mark all blocks used to prevent allocation * essentially implementing a per-group read-only flag. */ if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) { - ext4_error(sb, "Checksum bad for group %u", block_group); grp = ext4_get_group_info(sb, block_group); if (!EXT4_MB_GRP_BBITMAP_CORRUPT(grp)) percpu_counter_sub(&sbi->s_freeclusters_counter, @@ -442,14 +441,16 @@ ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group) } ext4_lock_group(sb, block_group); if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { - err = ext4_init_block_bitmap(sb, bh, block_group, desc); set_bitmap_uptodate(bh); set_buffer_uptodate(bh); ext4_unlock_group(sb, block_group); unlock_buffer(bh); - if (err) + if (err) { + ext4_error(sb, "Failed to init block bitmap for group " + "%u: %d", block_group, err); goto out; + } goto verify; } ext4_unlock_group(sb, block_group); diff --git a/fs/ext4/crypto.c b/fs/ext4/crypto.c index c802120..edc053a 100644 --- a/fs/ext4/crypto.c +++ b/fs/ext4/crypto.c @@ -18,11 +18,9 @@ * Special Publication 800-38E and IEEE P1619/D16. */ -#include <crypto/hash.h> -#include <crypto/sha.h> +#include <crypto/skcipher.h> #include <keys/user-type.h> #include <keys/encrypted-type.h> -#include <linux/crypto.h> #include <linux/ecryptfs.h> #include <linux/gfp.h> #include <linux/kernel.h> @@ -261,21 +259,21 @@ static int ext4_page_crypto(struct inode *inode, { u8 xts_tweak[EXT4_XTS_TWEAK_SIZE]; - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; DECLARE_EXT4_COMPLETION_RESULT(ecr); struct scatterlist dst, src; struct ext4_crypt_info *ci = EXT4_I(inode)->i_crypt_info; - struct crypto_ablkcipher *tfm = ci->ci_ctfm; + struct crypto_skcipher *tfm = ci->ci_ctfm; int res = 0; - req = ablkcipher_request_alloc(tfm, GFP_NOFS); + req = skcipher_request_alloc(tfm, GFP_NOFS); if (!req) { printk_ratelimited(KERN_ERR "%s: crypto_request_alloc() failed\n", __func__); return -ENOMEM; } - ablkcipher_request_set_callback( + skcipher_request_set_callback( req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, ext4_crypt_complete, &ecr); @@ -288,21 +286,21 @@ static int ext4_page_crypto(struct inode *inode, sg_set_page(&dst, dest_page, PAGE_CACHE_SIZE, 0); sg_init_table(&src, 1); sg_set_page(&src, src_page, PAGE_CACHE_SIZE, 0); - ablkcipher_request_set_crypt(req, &src, &dst, PAGE_CACHE_SIZE, - xts_tweak); + skcipher_request_set_crypt(req, &src, &dst, PAGE_CACHE_SIZE, + xts_tweak); if (rw == EXT4_DECRYPT) - res = crypto_ablkcipher_decrypt(req); + res = crypto_skcipher_decrypt(req); else - res = crypto_ablkcipher_encrypt(req); + res = crypto_skcipher_encrypt(req); if (res == -EINPROGRESS || res == -EBUSY) { wait_for_completion(&ecr.completion); res = ecr.res; } - ablkcipher_request_free(req); + skcipher_request_free(req); if (res) { printk_ratelimited( KERN_ERR - "%s: crypto_ablkcipher_encrypt() returned %d\n", + "%s: crypto_skcipher_encrypt() returned %d\n", __func__, res); return res; } @@ -467,3 +465,59 @@ uint32_t ext4_validate_encryption_key_size(uint32_t mode, uint32_t size) return size; return 0; } + +/* + * Validate dentries for encrypted directories to make sure we aren't + * potentially caching stale data after a key has been added or + * removed. + */ +static int ext4_d_revalidate(struct dentry *dentry, unsigned int flags) +{ + struct inode *dir = d_inode(dentry->d_parent); + struct ext4_crypt_info *ci = EXT4_I(dir)->i_crypt_info; + int dir_has_key, cached_with_key; + + if (!ext4_encrypted_inode(dir)) + return 0; + + if (ci && ci->ci_keyring_key && + (ci->ci_keyring_key->flags & ((1 << KEY_FLAG_INVALIDATED) | + (1 << KEY_FLAG_REVOKED) | + (1 << KEY_FLAG_DEAD)))) + ci = NULL; + + /* this should eventually be an flag in d_flags */ + cached_with_key = dentry->d_fsdata != NULL; + dir_has_key = (ci != NULL); + + /* + * If the dentry was cached without the key, and it is a + * negative dentry, it might be a valid name. We can't check + * if the key has since been made available due to locking + * reasons, so we fail the validation so ext4_lookup() can do + * this check. + * + * We also fail the validation if the dentry was created with + * the key present, but we no longer have the key, or vice versa. + */ + if ((!cached_with_key && d_is_negative(dentry)) || + (!cached_with_key && dir_has_key) || + (cached_with_key && !dir_has_key)) { +#if 0 /* Revalidation debug */ + char buf[80]; + char *cp = simple_dname(dentry, buf, sizeof(buf)); + + if (IS_ERR(cp)) + cp = (char *) "???"; + pr_err("revalidate: %s %p %d %d %d\n", cp, dentry->d_fsdata, + cached_with_key, d_is_negative(dentry), + dir_has_key); +#endif + return 0; + } + return 1; +} + +const struct dentry_operations ext4_encrypted_d_ops = { + .d_revalidate = ext4_d_revalidate, +}; diff --git a/fs/ext4/crypto_fname.c b/fs/ext4/crypto_fname.c index 2fbef8a..1a2f360 100644 --- a/fs/ext4/crypto_fname.c +++ b/fs/ext4/crypto_fname.c @@ -11,11 +11,9 @@ * */ -#include <crypto/hash.h> -#include <crypto/sha.h> +#include <crypto/skcipher.h> #include <keys/encrypted-type.h> #include <keys/user-type.h> -#include <linux/crypto.h> #include <linux/gfp.h> #include <linux/kernel.h> #include <linux/key.h> @@ -65,10 +63,10 @@ static int ext4_fname_encrypt(struct inode *inode, struct ext4_str *oname) { u32 ciphertext_len; - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; DECLARE_EXT4_COMPLETION_RESULT(ecr); struct ext4_crypt_info *ci = EXT4_I(inode)->i_crypt_info; - struct crypto_ablkcipher *tfm = ci->ci_ctfm; + struct crypto_skcipher *tfm = ci->ci_ctfm; int res = 0; char iv[EXT4_CRYPTO_BLOCK_SIZE]; struct scatterlist src_sg, dst_sg; @@ -95,14 +93,14 @@ static int ext4_fname_encrypt(struct inode *inode, } /* Allocate request */ - req = ablkcipher_request_alloc(tfm, GFP_NOFS); + req = skcipher_request_alloc(tfm, GFP_NOFS); if (!req) { printk_ratelimited( KERN_ERR "%s: crypto_request_alloc() failed\n", __func__); kfree(alloc_buf); return -ENOMEM; } - ablkcipher_request_set_callback(req, + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, ext4_dir_crypt_complete, &ecr); @@ -117,14 +115,14 @@ static int ext4_fname_encrypt(struct inode *inode, /* Create encryption request */ sg_init_one(&src_sg, workbuf, ciphertext_len); sg_init_one(&dst_sg, oname->name, ciphertext_len); - ablkcipher_request_set_crypt(req, &src_sg, &dst_sg, ciphertext_len, iv); - res = crypto_ablkcipher_encrypt(req); + skcipher_request_set_crypt(req, &src_sg, &dst_sg, ciphertext_len, iv); + res = crypto_skcipher_encrypt(req); if (res == -EINPROGRESS || res == -EBUSY) { wait_for_completion(&ecr.completion); res = ecr.res; } kfree(alloc_buf); - ablkcipher_request_free(req); + skcipher_request_free(req); if (res < 0) { printk_ratelimited( KERN_ERR "%s: Error (error code %d)\n", __func__, res); @@ -145,11 +143,11 @@ static int ext4_fname_decrypt(struct inode *inode, struct ext4_str *oname) { struct ext4_str tmp_in[2], tmp_out[1]; - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; DECLARE_EXT4_COMPLETION_RESULT(ecr); struct scatterlist src_sg, dst_sg; struct ext4_crypt_info *ci = EXT4_I(inode)->i_crypt_info; - struct crypto_ablkcipher *tfm = ci->ci_ctfm; + struct crypto_skcipher *tfm = ci->ci_ctfm; int res = 0; char iv[EXT4_CRYPTO_BLOCK_SIZE]; unsigned lim = max_name_len(inode); @@ -162,13 +160,13 @@ static int ext4_fname_decrypt(struct inode *inode, tmp_out[0].name = oname->name; /* Allocate request */ - req = ablkcipher_request_alloc(tfm, GFP_NOFS); + req = skcipher_request_alloc(tfm, GFP_NOFS); if (!req) { printk_ratelimited( KERN_ERR "%s: crypto_request_alloc() failed\n", __func__); return -ENOMEM; } - ablkcipher_request_set_callback(req, + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, ext4_dir_crypt_complete, &ecr); @@ -178,13 +176,13 @@ static int ext4_fname_decrypt(struct inode *inode, /* Create encryption request */ sg_init_one(&src_sg, iname->name, iname->len); sg_init_one(&dst_sg, oname->name, oname->len); - ablkcipher_request_set_crypt(req, &src_sg, &dst_sg, iname->len, iv); - res = crypto_ablkcipher_decrypt(req); + skcipher_request_set_crypt(req, &src_sg, &dst_sg, iname->len, iv); + res = crypto_skcipher_decrypt(req); if (res == -EINPROGRESS || res == -EBUSY) { wait_for_completion(&ecr.completion); res = ecr.res; } - ablkcipher_request_free(req); + skcipher_request_free(req); if (res < 0) { printk_ratelimited( KERN_ERR "%s: Error in ext4_fname_encrypt (error code %d)\n", diff --git a/fs/ext4/crypto_key.c b/fs/ext4/crypto_key.c index 9a16d1e..0129d68 100644 --- a/fs/ext4/crypto_key.c +++ b/fs/ext4/crypto_key.c @@ -8,6 +8,7 @@ * Written by Michael Halcrow, Ildar Muslukhov, and Uday Savagaonkar, 2015. */ +#include <crypto/skcipher.h> #include <keys/encrypted-type.h> #include <keys/user-type.h> #include <linux/random.h> @@ -41,45 +42,42 @@ static int ext4_derive_key_aes(char deriving_key[EXT4_AES_128_ECB_KEY_SIZE], char derived_key[EXT4_AES_256_XTS_KEY_SIZE]) { int res = 0; - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; DECLARE_EXT4_COMPLETION_RESULT(ecr); struct scatterlist src_sg, dst_sg; - struct crypto_ablkcipher *tfm = crypto_alloc_ablkcipher("ecb(aes)", 0, - 0); + struct crypto_skcipher *tfm = crypto_alloc_skcipher("ecb(aes)", 0, 0); if (IS_ERR(tfm)) { res = PTR_ERR(tfm); tfm = NULL; goto out; } - crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_REQ_WEAK_KEY); - req = ablkcipher_request_alloc(tfm, GFP_NOFS); + crypto_skcipher_set_flags(tfm, CRYPTO_TFM_REQ_WEAK_KEY); + req = skcipher_request_alloc(tfm, GFP_NOFS); if (!req) { res = -ENOMEM; goto out; } - ablkcipher_request_set_callback(req, + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, derive_crypt_complete, &ecr); - res = crypto_ablkcipher_setkey(tfm, deriving_key, - EXT4_AES_128_ECB_KEY_SIZE); + res = crypto_skcipher_setkey(tfm, deriving_key, + EXT4_AES_128_ECB_KEY_SIZE); if (res < 0) goto out; sg_init_one(&src_sg, source_key, EXT4_AES_256_XTS_KEY_SIZE); sg_init_one(&dst_sg, derived_key, EXT4_AES_256_XTS_KEY_SIZE); - ablkcipher_request_set_crypt(req, &src_sg, &dst_sg, - EXT4_AES_256_XTS_KEY_SIZE, NULL); - res = crypto_ablkcipher_encrypt(req); + skcipher_request_set_crypt(req, &src_sg, &dst_sg, + EXT4_AES_256_XTS_KEY_SIZE, NULL); + res = crypto_skcipher_encrypt(req); if (res == -EINPROGRESS || res == -EBUSY) { wait_for_completion(&ecr.completion); res = ecr.res; } out: - if (req) - ablkcipher_request_free(req); - if (tfm) - crypto_free_ablkcipher(tfm); + skcipher_request_free(req); + crypto_free_skcipher(tfm); return res; } @@ -90,7 +88,7 @@ void ext4_free_crypt_info(struct ext4_crypt_info *ci) if (ci->ci_keyring_key) key_put(ci->ci_keyring_key); - crypto_free_ablkcipher(ci->ci_ctfm); + crypto_free_skcipher(ci->ci_ctfm); kmem_cache_free(ext4_crypt_info_cachep, ci); } @@ -122,7 +120,7 @@ int _ext4_get_encryption_info(struct inode *inode) struct ext4_encryption_context ctx; const struct user_key_payload *ukp; struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); - struct crypto_ablkcipher *ctfm; + struct crypto_skcipher *ctfm; const char *cipher_str; char raw_key[EXT4_MAX_KEY_SIZE]; char mode; @@ -237,7 +235,7 @@ retry: if (res) goto out; got_key: - ctfm = crypto_alloc_ablkcipher(cipher_str, 0, 0); + ctfm = crypto_alloc_skcipher(cipher_str, 0, 0); if (!ctfm || IS_ERR(ctfm)) { res = ctfm ? PTR_ERR(ctfm) : -ENOMEM; printk(KERN_DEBUG @@ -246,11 +244,11 @@ got_key: goto out; } crypt_info->ci_ctfm = ctfm; - crypto_ablkcipher_clear_flags(ctfm, ~0); - crypto_tfm_set_flags(crypto_ablkcipher_tfm(ctfm), + crypto_skcipher_clear_flags(ctfm, ~0); + crypto_tfm_set_flags(crypto_skcipher_tfm(ctfm), CRYPTO_TFM_REQ_WEAK_KEY); - res = crypto_ablkcipher_setkey(ctfm, raw_key, - ext4_encryption_key_size(mode)); + res = crypto_skcipher_setkey(ctfm, raw_key, + ext4_encryption_key_size(mode)); if (res) goto out; memzero_explicit(raw_key, sizeof(raw_key)); diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index 1d1bca7..33f5e2a 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -111,6 +111,12 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx) int dir_has_error = 0; struct ext4_str fname_crypto_str = {.name = NULL, .len = 0}; + if (ext4_encrypted_inode(inode)) { + err = ext4_get_encryption_info(inode); + if (err && err != -ENOKEY) + return err; + } + if (is_dx_dir(inode)) { err = ext4_dx_readdir(file, ctx); if (err != ERR_BAD_DX_DIR) { @@ -157,8 +163,11 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx) index, 1); file->f_ra.prev_pos = (loff_t)index << PAGE_CACHE_SHIFT; bh = ext4_bread(NULL, inode, map.m_lblk, 0); - if (IS_ERR(bh)) - return PTR_ERR(bh); + if (IS_ERR(bh)) { + err = PTR_ERR(bh); + bh = NULL; + goto errout; + } } if (!bh) { diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 0662b28..393689d 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -42,6 +42,18 @@ */ /* + * with AGGRESSIVE_CHECK allocator runs consistency checks over + * structures. these checks slow things down a lot + */ +#define AGGRESSIVE_CHECK__ + +/* + * with DOUBLE_CHECK defined mballoc creates persistent in-core + * bitmaps, maintains and uses them to check for double allocations + */ +#define DOUBLE_CHECK__ + +/* * Define EXT4FS_DEBUG to produce debug messages */ #undef EXT4FS_DEBUG @@ -182,9 +194,9 @@ typedef struct ext4_io_end { struct bio *bio; /* Linked list of completed * bios covering the extent */ unsigned int flag; /* unwritten or not */ + atomic_t count; /* reference counter */ loff_t offset; /* offset in the file */ ssize_t size; /* size of the extent */ - atomic_t count; /* reference counter */ } ext4_io_end_t; struct ext4_io_submit { @@ -1024,13 +1036,8 @@ struct ext4_inode_info { * transaction reserved */ struct list_head i_rsv_conversion_list; - /* - * Completed IOs that need unwritten extents handling and don't have - * transaction reserved - */ - atomic_t i_ioend_count; /* Number of outstanding io_end structs */ - atomic_t i_unwritten; /* Nr. of inflight conversions pending */ struct work_struct i_rsv_conversion_work; + atomic_t i_unwritten; /* Nr. of inflight conversions pending */ spinlock_t i_block_reservation_lock; @@ -1513,16 +1520,6 @@ static inline void ext4_set_io_unwritten_flag(struct inode *inode, } } -static inline ext4_io_end_t *ext4_inode_aio(struct inode *inode) -{ - return inode->i_private; -} - -static inline void ext4_inode_aio_set(struct inode *inode, ext4_io_end_t *io) -{ - inode->i_private = io; -} - /* * Inode dynamic state flags */ @@ -2302,6 +2299,7 @@ struct page *ext4_encrypt(struct inode *inode, int ext4_decrypt(struct page *page); int ext4_encrypted_zeroout(struct inode *inode, ext4_lblk_t lblk, ext4_fsblk_t pblk, ext4_lblk_t len); +extern const struct dentry_operations ext4_encrypted_d_ops; #ifdef CONFIG_EXT4_FS_ENCRYPTION int ext4_init_crypto(void); @@ -2505,12 +2503,14 @@ extern int ext4_trim_fs(struct super_block *, struct fstrim_range *); int ext4_inode_is_fast_symlink(struct inode *inode); struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int); struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int); -int ext4_get_block_write(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create); +int ext4_get_block_unwritten(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create); int ext4_dax_mmap_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create); int ext4_get_block(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create); + struct buffer_head *bh_result, int create); +int ext4_dio_get_block(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create); int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, struct buffer_head *bh, int create); int ext4_walk_page_buffers(handle_t *handle, @@ -2558,6 +2558,9 @@ extern void ext4_da_update_reserve_space(struct inode *inode, int used, int quota_claim); extern int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk, ext4_fsblk_t pblk, ext4_lblk_t len); +extern int ext4_get_next_extent(struct inode *inode, ext4_lblk_t lblk, + unsigned int map_len, + struct extent_status *result); /* indirect.c */ extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, @@ -3284,10 +3287,7 @@ static inline void ext4_inode_resume_unlocked_dio(struct inode *inode) #define EXT4_WQ_HASH_SZ 37 #define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\ EXT4_WQ_HASH_SZ]) -#define ext4_aio_mutex(v) (&ext4__aio_mutex[((unsigned long)(v)) %\ - EXT4_WQ_HASH_SZ]) extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; -extern struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; #define EXT4_RESIZING 0 extern int ext4_resize_begin(struct super_block *sb); diff --git a/fs/ext4/ext4_crypto.h b/fs/ext4/ext4_crypto.h index ac7d4e8..1f73c29 100644 --- a/fs/ext4/ext4_crypto.h +++ b/fs/ext4/ext4_crypto.h @@ -77,7 +77,7 @@ struct ext4_crypt_info { char ci_data_mode; char ci_filename_mode; char ci_flags; - struct crypto_ablkcipher *ci_ctfm; + struct crypto_skcipher *ci_ctfm; struct key *ci_keyring_key; char ci_master_key[EXT4_KEY_DESCRIPTOR_SIZE]; }; diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h index 3c93815..8ecf84b 100644 --- a/fs/ext4/ext4_extents.h +++ b/fs/ext4/ext4_extents.h @@ -11,7 +11,7 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * - * You should have received a copy of the GNU General Public Licens + * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111- */ diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 0ffabaf..95bf467 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -15,7 +15,7 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * - * You should have received a copy of the GNU General Public Licens + * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111- */ @@ -1736,6 +1736,12 @@ ext4_can_extents_be_merged(struct inode *inode, struct ext4_extent *ex1, */ if (ext1_ee_len + ext2_ee_len > EXT_INIT_MAX_LEN) return 0; + /* + * The check for IO to unwritten extent is somewhat racy as we + * increment i_unwritten / set EXT4_STATE_DIO_UNWRITTEN only after + * dropping i_data_sem. But reserved blocks should save us in that + * case. + */ if (ext4_ext_is_unwritten(ex1) && (ext4_test_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN) || atomic_read(&EXT4_I(inode)->i_unwritten) || @@ -2293,59 +2299,69 @@ static int ext4_fill_fiemap_extents(struct inode *inode, } /* - * ext4_ext_put_gap_in_cache: - * calculate boundaries of the gap that the requested block fits into - * and cache this gap + * ext4_ext_determine_hole - determine hole around given block + * @inode: inode we lookup in + * @path: path in extent tree to @lblk + * @lblk: pointer to logical block around which we want to determine hole + * + * Determine hole length (and start if easily possible) around given logical + * block. We don't try too hard to find the beginning of the hole but @path + * actually points to extent before @lblk, we provide it. + * + * The function returns the length of a hole starting at @lblk. We update @lblk + * to the beginning of the hole if we managed to find it. */ -static void -ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path, - ext4_lblk_t block) +static ext4_lblk_t ext4_ext_determine_hole(struct inode *inode, + struct ext4_ext_path *path, + ext4_lblk_t *lblk) { int depth = ext_depth(inode); - ext4_lblk_t len; - ext4_lblk_t lblock; struct ext4_extent *ex; - struct extent_status es; + ext4_lblk_t len; ex = path[depth].p_ext; if (ex == NULL) { /* there is no extent yet, so gap is [0;-] */ - lblock = 0; + *lblk = 0; len = EXT_MAX_BLOCKS; - ext_debug("cache gap(whole file):"); - } else if (block < le32_to_cpu(ex->ee_block)) { - lblock = block; - len = le32_to_cpu(ex->ee_block) - block; - ext_debug("cache gap(before): %u [%u:%u]", - block, - le32_to_cpu(ex->ee_block), - ext4_ext_get_actual_len(ex)); - } else if (block >= le32_to_cpu(ex->ee_block) + } else if (*lblk < le32_to_cpu(ex->ee_block)) { + len = le32_to_cpu(ex->ee_block) - *lblk; + } else if (*lblk >= le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex)) { ext4_lblk_t next; - lblock = le32_to_cpu(ex->ee_block) - + ext4_ext_get_actual_len(ex); + *lblk = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex); next = ext4_ext_next_allocated_block(path); - ext_debug("cache gap(after): [%u:%u] %u", - le32_to_cpu(ex->ee_block), - ext4_ext_get_actual_len(ex), - block); - BUG_ON(next == lblock); - len = next - lblock; + BUG_ON(next == *lblk); + len = next - *lblk; } else { BUG(); } + return len; +} - ext4_es_find_delayed_extent_range(inode, lblock, lblock + len - 1, &es); +/* + * ext4_ext_put_gap_in_cache: + * calculate boundaries of the gap that the requested block fits into + * and cache this gap + */ +static void +ext4_ext_put_gap_in_cache(struct inode *inode, ext4_lblk_t hole_start, + ext4_lblk_t hole_len) +{ + struct extent_status es; + + ext4_es_find_delayed_extent_range(inode, hole_start, + hole_start + hole_len - 1, &es); if (es.es_len) { /* There's delayed extent containing lblock? */ - if (es.es_lblk <= lblock) + if (es.es_lblk <= hole_start) return; - len = min(es.es_lblk - lblock, len); + hole_len = min(es.es_lblk - hole_start, hole_len); } - ext_debug(" -> %u:%u\n", lblock, len); - ext4_es_insert_extent(inode, lblock, len, ~0, EXTENT_STATUS_HOLE); + ext_debug(" -> %u:%u\n", hole_start, hole_len); + ext4_es_insert_extent(inode, hole_start, hole_len, ~0, + EXTENT_STATUS_HOLE); } /* @@ -3927,8 +3943,8 @@ get_reserved_cluster_alloc(struct inode *inode, ext4_lblk_t lblk_start, static int convert_initialized_extent(handle_t *handle, struct inode *inode, struct ext4_map_blocks *map, - struct ext4_ext_path **ppath, int flags, - unsigned int allocated, ext4_fsblk_t newblock) + struct ext4_ext_path **ppath, + unsigned int allocated) { struct ext4_ext_path *path = *ppath; struct ext4_extent *ex; @@ -4007,7 +4023,6 @@ ext4_ext_handle_unwritten_extents(handle_t *handle, struct inode *inode, struct ext4_ext_path *path = *ppath; int ret = 0; int err = 0; - ext4_io_end_t *io = ext4_inode_aio(inode); ext_debug("ext4_ext_handle_unwritten_extents: inode %lu, logical " "block %llu, max_blocks %u, flags %x, allocated %u\n", @@ -4030,15 +4045,6 @@ ext4_ext_handle_unwritten_extents(handle_t *handle, struct inode *inode, flags | EXT4_GET_BLOCKS_CONVERT); if (ret <= 0) goto out; - /* - * Flag the inode(non aio case) or end_io struct (aio case) - * that this IO needs to conversion to written when IO is - * completed - */ - if (io) - ext4_set_io_unwritten_flag(inode, io); - else - ext4_set_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN); map->m_flags |= EXT4_MAP_UNWRITTEN; goto out; } @@ -4283,9 +4289,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, unsigned int allocated = 0, offset = 0; unsigned int allocated_clusters = 0; struct ext4_allocation_request ar; - ext4_io_end_t *io = ext4_inode_aio(inode); ext4_lblk_t cluster_offset; - int set_unwritten = 0; bool map_from_cluster = false; ext_debug("blocks %u/%u requested for inode %lu\n", @@ -4347,7 +4351,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, (flags & EXT4_GET_BLOCKS_CONVERT_UNWRITTEN)) { allocated = convert_initialized_extent( handle, inode, map, &path, - flags, allocated, newblock); + allocated); goto out2; } else if (!ext4_ext_is_unwritten(ex)) goto out; @@ -4368,11 +4372,22 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, * we couldn't try to create block if create flag is zero */ if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { + ext4_lblk_t hole_start, hole_len; + + hole_start = map->m_lblk; + hole_len = ext4_ext_determine_hole(inode, path, &hole_start); /* * put just found gap into cache to speed up * subsequent requests */ - ext4_ext_put_gap_in_cache(inode, path, map->m_lblk); + ext4_ext_put_gap_in_cache(inode, hole_start, hole_len); + + /* Update hole_len to reflect hole size after map->m_lblk */ + if (hole_start != map->m_lblk) + hole_len -= map->m_lblk - hole_start; + map->m_pblk = 0; + map->m_len = min_t(unsigned int, map->m_len, hole_len); + goto out2; } @@ -4482,15 +4497,6 @@ got_allocated_blocks: if (flags & EXT4_GET_BLOCKS_UNWRIT_EXT){ ext4_ext_mark_unwritten(&newex); map->m_flags |= EXT4_MAP_UNWRITTEN; - /* - * io_end structure was created for every IO write to an - * unwritten extent. To avoid unnecessary conversion, - * here we flag the IO that really needs the conversion. - * For non asycn direct IO case, flag the inode state - * that we need to perform conversion when IO is done. - */ - if (flags & EXT4_GET_BLOCKS_PRE_IO) - set_unwritten = 1; } err = 0; @@ -4501,14 +4507,6 @@ got_allocated_blocks: err = ext4_ext_insert_extent(handle, inode, &path, &newex, flags); - if (!err && set_unwritten) { - if (io) - ext4_set_io_unwritten_flag(inode, io); - else - ext4_set_inode_state(inode, - EXT4_STATE_DIO_UNWRITTEN); - } - if (err && free_on_err) { int fb_flags = flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE ? EXT4_FREE_BLOCKS_NO_QUOT_UPDATE : 0; diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index ac748b3..e38b987a 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -823,8 +823,8 @@ out: es->es_lblk = es1->es_lblk; es->es_len = es1->es_len; es->es_pblk = es1->es_pblk; - if (!ext4_es_is_referenced(es)) - ext4_es_set_referenced(es); + if (!ext4_es_is_referenced(es1)) + ext4_es_set_referenced(es1); stats->es_stats_cache_hits++; } else { stats->es_stats_cache_misses++; diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 1126436..6659e21 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -93,31 +93,29 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from) { struct file *file = iocb->ki_filp; struct inode *inode = file_inode(iocb->ki_filp); - struct mutex *aio_mutex = NULL; struct blk_plug plug; int o_direct = iocb->ki_flags & IOCB_DIRECT; + int unaligned_aio = 0; int overwrite = 0; ssize_t ret; + inode_lock(inode); + ret = generic_write_checks(iocb, from); + if (ret <= 0) + goto out; + /* - * Unaligned direct AIO must be serialized; see comment above - * In the case of O_APPEND, assume that we must always serialize + * Unaligned direct AIO must be serialized among each other as zeroing + * of partial blocks of two competing unaligned AIOs can result in data + * corruption. */ - if (o_direct && - ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS) && + if (o_direct && ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS) && !is_sync_kiocb(iocb) && - (iocb->ki_flags & IOCB_APPEND || - ext4_unaligned_aio(inode, from, iocb->ki_pos))) { - aio_mutex = ext4_aio_mutex(inode); - mutex_lock(aio_mutex); + ext4_unaligned_aio(inode, from, iocb->ki_pos)) { + unaligned_aio = 1; ext4_unwritten_wait(inode); } - inode_lock(inode); - ret = generic_write_checks(iocb, from); - if (ret <= 0) - goto out; - /* * If we have encountered a bitmap-format file, the size limit * is smaller than s_maxbytes, which is for extent-mapped files. @@ -139,7 +137,7 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from) blk_start_plug(&plug); /* check whether we do a DIO overwrite or not */ - if (ext4_should_dioread_nolock(inode) && !aio_mutex && + if (ext4_should_dioread_nolock(inode) && !unaligned_aio && !file->f_mapping->nrpages && pos + length <= i_size_read(inode)) { struct ext4_map_blocks map; unsigned int blkbits = inode->i_blkbits; @@ -181,14 +179,10 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from) if (o_direct) blk_finish_plug(&plug); - if (aio_mutex) - mutex_unlock(aio_mutex); return ret; out: inode_unlock(inode); - if (aio_mutex) - mutex_unlock(aio_mutex); return ret; } @@ -262,23 +256,8 @@ static int ext4_dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr, return result; } -static int ext4_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) -{ - int err; - struct inode *inode = file_inode(vma->vm_file); - - sb_start_pagefault(inode->i_sb); - file_update_time(vma->vm_file); - down_read(&EXT4_I(inode)->i_mmap_sem); - err = __dax_mkwrite(vma, vmf, ext4_dax_mmap_get_block, NULL); - up_read(&EXT4_I(inode)->i_mmap_sem); - sb_end_pagefault(inode->i_sb); - - return err; -} - /* - * Handle write fault for VM_MIXEDMAP mappings. Similarly to ext4_dax_mkwrite() + * Handle write fault for VM_MIXEDMAP mappings. Similarly to ext4_dax_fault() * handler we check for races agaist truncate. Note that since we cycle through * i_mmap_sem, we are sure that also any hole punching that began before we * were called is finished by now and so if it included part of the file we @@ -311,7 +290,7 @@ static int ext4_dax_pfn_mkwrite(struct vm_area_struct *vma, static const struct vm_operations_struct ext4_dax_vm_ops = { .fault = ext4_dax_fault, .pmd_fault = ext4_dax_pmd_fault, - .page_mkwrite = ext4_dax_mkwrite, + .page_mkwrite = ext4_dax_fault, .pfn_mkwrite = ext4_dax_pfn_mkwrite, }; #else @@ -350,6 +329,7 @@ static int ext4_file_open(struct inode * inode, struct file * filp) struct super_block *sb = inode->i_sb; struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); struct vfsmount *mnt = filp->f_path.mnt; + struct inode *dir = filp->f_path.dentry->d_parent->d_inode; struct path path; char buf[64], *cp; int ret; @@ -393,6 +373,14 @@ static int ext4_file_open(struct inode * inode, struct file * filp) if (ext4_encryption_info(inode) == NULL) return -ENOKEY; } + if (ext4_encrypted_inode(dir) && + !ext4_is_child_context_consistent_with_parent(dir, inode)) { + ext4_warning(inode->i_sb, + "Inconsistent encryption contexts: %lu/%lu\n", + (unsigned long) dir->i_ino, + (unsigned long) inode->i_ino); + return -EPERM; + } /* * Set up the jbd2_inode if we are opening the inode for * writing and the journal is present @@ -423,7 +411,7 @@ static int ext4_file_open(struct inode * inode, struct file * filp) */ static int ext4_find_unwritten_pgoff(struct inode *inode, int whence, - struct ext4_map_blocks *map, + ext4_lblk_t end_blk, loff_t *offset) { struct pagevec pvec; @@ -438,7 +426,7 @@ static int ext4_find_unwritten_pgoff(struct inode *inode, blkbits = inode->i_sb->s_blocksize_bits; startoff = *offset; lastoff = startoff; - endoff = (loff_t)(map->m_lblk + map->m_len) << blkbits; + endoff = (loff_t)end_blk << blkbits; index = startoff >> PAGE_CACHE_SHIFT; end = endoff >> PAGE_CACHE_SHIFT; @@ -556,12 +544,11 @@ out: static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize) { struct inode *inode = file->f_mapping->host; - struct ext4_map_blocks map; struct extent_status es; ext4_lblk_t start, last, end; loff_t dataoff, isize; int blkbits; - int ret = 0; + int ret; inode_lock(inode); @@ -578,41 +565,32 @@ static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize) dataoff = offset; do { - map.m_lblk = last; - map.m_len = end - last + 1; - ret = ext4_map_blocks(NULL, inode, &map, 0); - if (ret > 0 && !(map.m_flags & EXT4_MAP_UNWRITTEN)) { - if (last != start) - dataoff = (loff_t)last << blkbits; - break; + ret = ext4_get_next_extent(inode, last, end - last + 1, &es); + if (ret <= 0) { + /* No extent found -> no data */ + if (ret == 0) + ret = -ENXIO; + inode_unlock(inode); + return ret; } - /* - * If there is a delay extent at this offset, - * it will be as a data. - */ - ext4_es_find_delayed_extent_range(inode, last, last, &es); - if (es.es_len != 0 && in_range(last, es.es_lblk, es.es_len)) { - if (last != start) - dataoff = (loff_t)last << blkbits; + last = es.es_lblk; + if (last != start) + dataoff = (loff_t)last << blkbits; + if (!ext4_es_is_unwritten(&es)) break; - } /* * If there is a unwritten extent at this offset, * it will be as a data or a hole according to page * cache that has data or not. */ - if (map.m_flags & EXT4_MAP_UNWRITTEN) { - int unwritten; - unwritten = ext4_find_unwritten_pgoff(inode, SEEK_DATA, - &map, &dataoff); - if (unwritten) - break; - } - - last++; + if (ext4_find_unwritten_pgoff(inode, SEEK_DATA, + es.es_lblk + es.es_len, &dataoff)) + break; + last += es.es_len; dataoff = (loff_t)last << blkbits; + cond_resched(); } while (last <= end); inode_unlock(inode); @@ -629,12 +607,11 @@ static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize) static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize) { struct inode *inode = file->f_mapping->host; - struct ext4_map_blocks map; struct extent_status es; ext4_lblk_t start, last, end; loff_t holeoff, isize; int blkbits; - int ret = 0; + int ret; inode_lock(inode); @@ -651,44 +628,30 @@ static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize) holeoff = offset; do { - map.m_lblk = last; - map.m_len = end - last + 1; - ret = ext4_map_blocks(NULL, inode, &map, 0); - if (ret > 0 && !(map.m_flags & EXT4_MAP_UNWRITTEN)) { - last += ret; - holeoff = (loff_t)last << blkbits; - continue; + ret = ext4_get_next_extent(inode, last, end - last + 1, &es); + if (ret < 0) { + inode_unlock(inode); + return ret; } - - /* - * If there is a delay extent at this offset, - * we will skip this extent. - */ - ext4_es_find_delayed_extent_range(inode, last, last, &es); - if (es.es_len != 0 && in_range(last, es.es_lblk, es.es_len)) { - last = es.es_lblk + es.es_len; - holeoff = (loff_t)last << blkbits; - continue; + /* Found a hole? */ + if (ret == 0 || es.es_lblk > last) { + if (last != start) + holeoff = (loff_t)last << blkbits; + break; } - /* * If there is a unwritten extent at this offset, * it will be as a data or a hole according to page * cache that has data or not. */ - if (map.m_flags & EXT4_MAP_UNWRITTEN) { - int unwritten; - unwritten = ext4_find_unwritten_pgoff(inode, SEEK_HOLE, - &map, &holeoff); - if (!unwritten) { - last += ret; - holeoff = (loff_t)last << blkbits; - continue; - } - } + if (ext4_es_is_unwritten(&es) && + ext4_find_unwritten_pgoff(inode, SEEK_HOLE, + last + es.es_len, &holeoff)) + break; - /* find a hole */ - break; + last += es.es_len; + holeoff = (loff_t)last << blkbits; + cond_resched(); } while (last <= end); inode_unlock(inode); diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 3fcfd50..237b877 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -76,7 +76,6 @@ static int ext4_init_inode_bitmap(struct super_block *sb, /* If checksum is bad mark all blocks and inodes use to prevent * allocation, essentially implementing a per-group read-only flag. */ if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) { - ext4_error(sb, "Checksum bad for group %u", block_group); grp = ext4_get_group_info(sb, block_group); if (!EXT4_MB_GRP_BBITMAP_CORRUPT(grp)) percpu_counter_sub(&sbi->s_freeclusters_counter, @@ -191,8 +190,11 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group) set_buffer_verified(bh); ext4_unlock_group(sb, block_group); unlock_buffer(bh); - if (err) + if (err) { + ext4_error(sb, "Failed to init inode bitmap for group " + "%u: %d", block_group, err); goto out; + } return bh; } ext4_unlock_group(sb, block_group); @@ -785,7 +787,7 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir, sbi = EXT4_SB(sb); /* - * Initalize owners and quota early so that we don't have to account + * Initialize owners and quota early so that we don't have to account * for quota initialization worst case in standard inode creating * transaction */ diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c index 355ef9c..3027fa6 100644 --- a/fs/ext4/indirect.c +++ b/fs/ext4/indirect.c @@ -555,8 +555,23 @@ int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, goto got_it; } - /* Next simple case - plain lookup or failed read of indirect block */ - if ((flags & EXT4_GET_BLOCKS_CREATE) == 0 || err == -EIO) + /* Next simple case - plain lookup failed */ + if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { + unsigned epb = inode->i_sb->s_blocksize / sizeof(u32); + int i; + + /* Count number blocks in a subtree under 'partial' */ + count = 1; + for (i = 0; partial + i != chain + depth - 1; i++) + count *= epb; + /* Fill in size of a hole we found */ + map->m_pblk = 0; + map->m_len = min_t(unsigned int, map->m_len, count); + goto cleanup; + } + + /* Failed read of indirect block */ + if (err == -EIO) goto cleanup; /* @@ -693,21 +708,21 @@ retry: } if (IS_DAX(inode)) ret = dax_do_io(iocb, inode, iter, offset, - ext4_get_block, NULL, 0); + ext4_dio_get_block, NULL, 0); else ret = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev, iter, - offset, ext4_get_block, NULL, - NULL, 0); + offset, ext4_dio_get_block, + NULL, NULL, 0); inode_dio_end(inode); } else { locked: if (IS_DAX(inode)) ret = dax_do_io(iocb, inode, iter, offset, - ext4_get_block, NULL, DIO_LOCKING); + ext4_dio_get_block, NULL, DIO_LOCKING); else ret = blockdev_direct_IO(iocb, inode, iter, offset, - ext4_get_block); + ext4_dio_get_block); if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { loff_t isize = i_size_read(inode); diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index dfe3b9b..7cbdd375 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -581,9 +581,10 @@ retry: if (ret) goto out; - if (ext4_should_dioread_nolock(inode)) - ret = __block_write_begin(page, from, to, ext4_get_block_write); - else + if (ext4_should_dioread_nolock(inode)) { + ret = __block_write_begin(page, from, to, + ext4_get_block_unwritten); + } else ret = __block_write_begin(page, from, to, ext4_get_block); if (!ret && ext4_should_journal_data(inode)) { @@ -1696,7 +1697,6 @@ int ext4_delete_inline_entry(handle_t *handle, if (err) goto out; - BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata"); err = ext4_mark_inode_dirty(handle, dir); if (unlikely(err)) goto out; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 83bc8bf..b2e9576 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -216,7 +216,6 @@ void ext4_evict_inode(struct inode *inode) } truncate_inode_pages_final(&inode->i_data); - WARN_ON(atomic_read(&EXT4_I(inode)->i_ioend_count)); goto no_delete; } @@ -228,8 +227,6 @@ void ext4_evict_inode(struct inode *inode) ext4_begin_ordered_truncate(inode, 0); truncate_inode_pages_final(&inode->i_data); - WARN_ON(atomic_read(&EXT4_I(inode)->i_ioend_count)); - /* * Protect us against freezing - iput() caller didn't have to have any * protection against it @@ -458,13 +455,13 @@ static void ext4_map_blocks_es_recheck(handle_t *handle, * Otherwise, call with ext4_ind_map_blocks() to handle indirect mapping * based files * - * On success, it returns the number of blocks being mapped or allocated. - * if create==0 and the blocks are pre-allocated and unwritten block, - * the result buffer head is unmapped. If the create ==1, it will make sure - * the buffer head is mapped. + * On success, it returns the number of blocks being mapped or allocated. if + * create==0 and the blocks are pre-allocated and unwritten, the resulting @map + * is marked as unwritten. If the create == 1, it will mark @map as mapped. * * It returns 0 if plain look up failed (blocks have not been allocated), in - * that case, buffer head is unmapped + * that case, @map is returned as unmapped but we still do fill map->m_len to + * indicate the length of a hole starting at map->m_lblk. * * It returns the error in case of allocation failure. */ @@ -507,6 +504,11 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, retval = map->m_len; map->m_len = retval; } else if (ext4_es_is_delayed(&es) || ext4_es_is_hole(&es)) { + map->m_pblk = 0; + retval = es.es_len - (map->m_lblk - es.es_lblk); + if (retval > map->m_len) + retval = map->m_len; + map->m_len = retval; retval = 0; } else { BUG_ON(1); @@ -686,16 +688,39 @@ out_sem: return retval; } -/* Maximum number of blocks we map for direct IO at once. */ -#define DIO_MAX_BLOCKS 4096 +/* + * Update EXT4_MAP_FLAGS in bh->b_state. For buffer heads attached to pages + * we have to be careful as someone else may be manipulating b_state as well. + */ +static void ext4_update_bh_state(struct buffer_head *bh, unsigned long flags) +{ + unsigned long old_state; + unsigned long new_state; + + flags &= EXT4_MAP_FLAGS; + + /* Dummy buffer_head? Set non-atomically. */ + if (!bh->b_page) { + bh->b_state = (bh->b_state & ~EXT4_MAP_FLAGS) | flags; + return; + } + /* + * Someone else may be modifying b_state. Be careful! This is ugly but + * once we get rid of using bh as a container for mapping information + * to pass to / from get_block functions, this can go away. + */ + do { + old_state = READ_ONCE(bh->b_state); + new_state = (old_state & ~EXT4_MAP_FLAGS) | flags; + } while (unlikely( + cmpxchg(&bh->b_state, old_state, new_state) != old_state)); +} static int _ext4_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh, int flags) { - handle_t *handle = ext4_journal_current_handle(); struct ext4_map_blocks map; - int ret = 0, started = 0; - int dio_credits; + int ret = 0; if (ext4_has_inline_data(inode)) return -ERANGE; @@ -703,33 +728,14 @@ static int _ext4_get_block(struct inode *inode, sector_t iblock, map.m_lblk = iblock; map.m_len = bh->b_size >> inode->i_blkbits; - if (flags && !handle) { - /* Direct IO write... */ - if (map.m_len > DIO_MAX_BLOCKS) - map.m_len = DIO_MAX_BLOCKS; - dio_credits = ext4_chunk_trans_blocks(inode, map.m_len); - handle = ext4_journal_start(inode, EXT4_HT_MAP_BLOCKS, - dio_credits); - if (IS_ERR(handle)) { - ret = PTR_ERR(handle); - return ret; - } - started = 1; - } - - ret = ext4_map_blocks(handle, inode, &map, flags); + ret = ext4_map_blocks(ext4_journal_current_handle(), inode, &map, + flags); if (ret > 0) { - ext4_io_end_t *io_end = ext4_inode_aio(inode); - map_bh(bh, inode->i_sb, map.m_pblk); - bh->b_state = (bh->b_state & ~EXT4_MAP_FLAGS) | map.m_flags; - if (io_end && io_end->flag & EXT4_IO_END_UNWRITTEN) - set_buffer_defer_completion(bh); + ext4_update_bh_state(bh, map.m_flags); bh->b_size = inode->i_sb->s_blocksize * map.m_len; ret = 0; } - if (started) - ext4_journal_stop(handle); return ret; } @@ -741,6 +747,155 @@ int ext4_get_block(struct inode *inode, sector_t iblock, } /* + * Get block function used when preparing for buffered write if we require + * creating an unwritten extent if blocks haven't been allocated. The extent + * will be converted to written after the IO is complete. + */ +int ext4_get_block_unwritten(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create) +{ + ext4_debug("ext4_get_block_unwritten: inode %lu, create flag %d\n", + inode->i_ino, create); + return _ext4_get_block(inode, iblock, bh_result, + EXT4_GET_BLOCKS_IO_CREATE_EXT); +} + +/* Maximum number of blocks we map for direct IO at once. */ +#define DIO_MAX_BLOCKS 4096 + +static handle_t *start_dio_trans(struct inode *inode, + struct buffer_head *bh_result) +{ + int dio_credits; + + /* Trim mapping request to maximum we can map at once for DIO */ + if (bh_result->b_size >> inode->i_blkbits > DIO_MAX_BLOCKS) + bh_result->b_size = DIO_MAX_BLOCKS << inode->i_blkbits; + dio_credits = ext4_chunk_trans_blocks(inode, + bh_result->b_size >> inode->i_blkbits); + return ext4_journal_start(inode, EXT4_HT_MAP_BLOCKS, dio_credits); +} + +/* Get block function for DIO reads and writes to inodes without extents */ +int ext4_dio_get_block(struct inode *inode, sector_t iblock, + struct buffer_head *bh, int create) +{ + handle_t *handle; + int ret; + + /* We don't expect handle for direct IO */ + WARN_ON_ONCE(ext4_journal_current_handle()); + + if (create) { + handle = start_dio_trans(inode, bh); + if (IS_ERR(handle)) + return PTR_ERR(handle); + } + ret = _ext4_get_block(inode, iblock, bh, + create ? EXT4_GET_BLOCKS_CREATE : 0); + if (create) + ext4_journal_stop(handle); + return ret; +} + +/* + * Get block function for AIO DIO writes when we create unwritten extent if + * blocks are not allocated yet. The extent will be converted to written + * after IO is complete. + */ +static int ext4_dio_get_block_unwritten_async(struct inode *inode, + sector_t iblock, struct buffer_head *bh_result, int create) +{ + handle_t *handle; + int ret; + + /* We don't expect handle for direct IO */ + WARN_ON_ONCE(ext4_journal_current_handle()); + + handle = start_dio_trans(inode, bh_result); + if (IS_ERR(handle)) + return PTR_ERR(handle); + ret = _ext4_get_block(inode, iblock, bh_result, + EXT4_GET_BLOCKS_IO_CREATE_EXT); + ext4_journal_stop(handle); + + /* + * When doing DIO using unwritten extents, we need io_end to convert + * unwritten extents to written on IO completion. We allocate io_end + * once we spot unwritten extent and store it in b_private. Generic + * DIO code keeps b_private set and furthermore passes the value to + * our completion callback in 'private' argument. + */ + if (!ret && buffer_unwritten(bh_result)) { + if (!bh_result->b_private) { + ext4_io_end_t *io_end; + + io_end = ext4_init_io_end(inode, GFP_KERNEL); + if (!io_end) + return -ENOMEM; + bh_result->b_private = io_end; + ext4_set_io_unwritten_flag(inode, io_end); + } + set_buffer_defer_completion(bh_result); + } + + return ret; +} + +/* + * Get block function for non-AIO DIO writes when we create unwritten extent if + * blocks are not allocated yet. The extent will be converted to written + * after IO is complete from ext4_ext_direct_IO() function. + */ +static int ext4_dio_get_block_unwritten_sync(struct inode *inode, + sector_t iblock, struct buffer_head *bh_result, int create) +{ + handle_t *handle; + int ret; + + /* We don't expect handle for direct IO */ + WARN_ON_ONCE(ext4_journal_current_handle()); + + handle = start_dio_trans(inode, bh_result); + if (IS_ERR(handle)) + return PTR_ERR(handle); + ret = _ext4_get_block(inode, iblock, bh_result, + EXT4_GET_BLOCKS_IO_CREATE_EXT); + ext4_journal_stop(handle); + + /* + * Mark inode as having pending DIO writes to unwritten extents. + * ext4_ext_direct_IO() checks this flag and converts extents to + * written. + */ + if (!ret && buffer_unwritten(bh_result)) + ext4_set_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN); + + return ret; +} + +static int ext4_dio_get_block_overwrite(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create) +{ + int ret; + + ext4_debug("ext4_dio_get_block_overwrite: inode %lu, create flag %d\n", + inode->i_ino, create); + /* We don't expect handle for direct IO */ + WARN_ON_ONCE(ext4_journal_current_handle()); + + ret = _ext4_get_block(inode, iblock, bh_result, 0); + /* + * Blocks should have been preallocated! ext4_file_write_iter() checks + * that. + */ + WARN_ON_ONCE(!buffer_mapped(bh_result) || buffer_unwritten(bh_result)); + + return ret; +} + + +/* * `handle' can be NULL if create is zero */ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode, @@ -1051,13 +1206,14 @@ retry_journal: #ifdef CONFIG_EXT4_FS_ENCRYPTION if (ext4_should_dioread_nolock(inode)) ret = ext4_block_write_begin(page, pos, len, - ext4_get_block_write); + ext4_get_block_unwritten); else ret = ext4_block_write_begin(page, pos, len, ext4_get_block); #else if (ext4_should_dioread_nolock(inode)) - ret = __block_write_begin(page, pos, len, ext4_get_block_write); + ret = __block_write_begin(page, pos, len, + ext4_get_block_unwritten); else ret = __block_write_begin(page, pos, len, ext4_get_block); #endif @@ -1685,7 +1841,7 @@ int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, return ret; map_bh(bh, inode->i_sb, map.m_pblk); - bh->b_state = (bh->b_state & ~EXT4_MAP_FLAGS) | map.m_flags; + ext4_update_bh_state(bh, map.m_flags); if (buffer_unwritten(bh)) { /* A delayed write to unwritten bh should be marked @@ -2450,6 +2606,10 @@ static int ext4_writepages(struct address_space *mapping, trace_ext4_writepages(inode, wbc); + if (dax_mapping(mapping)) + return dax_writeback_mapping_range(mapping, inode->i_sb->s_bdev, + wbc); + /* * No pages to write? This is mainly a kludge to avoid starting * a transaction for special inodes like journal inode on last iput() @@ -3056,37 +3216,6 @@ static int ext4_releasepage(struct page *page, gfp_t wait) return try_to_free_buffers(page); } -/* - * ext4_get_block used when preparing for a DIO write or buffer write. - * We allocate an uinitialized extent if blocks haven't been allocated. - * The extent will be converted to initialized after the IO is complete. - */ -int ext4_get_block_write(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create) -{ - ext4_debug("ext4_get_block_write: inode %lu, create flag %d\n", - inode->i_ino, create); - return _ext4_get_block(inode, iblock, bh_result, - EXT4_GET_BLOCKS_IO_CREATE_EXT); -} - -static int ext4_get_block_overwrite(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create) -{ - int ret; - - ext4_debug("ext4_get_block_overwrite: inode %lu, create flag %d\n", - inode->i_ino, create); - ret = _ext4_get_block(inode, iblock, bh_result, 0); - /* - * Blocks should have been preallocated! ext4_file_write_iter() checks - * that. - */ - WARN_ON_ONCE(!buffer_mapped(bh_result)); - - return ret; -} - #ifdef CONFIG_FS_DAX int ext4_dax_mmap_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) @@ -3147,13 +3276,12 @@ out: WARN_ON_ONCE(ret == 0 && create); if (ret > 0) { map_bh(bh_result, inode->i_sb, map.m_pblk); - bh_result->b_state = (bh_result->b_state & ~EXT4_MAP_FLAGS) | - map.m_flags; /* * At least for now we have to clear BH_New so that DAX code * doesn't attempt to zero blocks again in a racy way. */ - bh_result->b_state &= ~(1 << BH_New); + map.m_flags &= ~EXT4_MAP_NEW; + ext4_update_bh_state(bh_result, map.m_flags); bh_result->b_size = map.m_len << inode->i_blkbits; ret = 0; } @@ -3164,7 +3292,7 @@ out: static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset, ssize_t size, void *private) { - ext4_io_end_t *io_end = iocb->private; + ext4_io_end_t *io_end = private; /* if not async direct IO just return */ if (!io_end) @@ -3172,10 +3300,8 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset, ext_debug("ext4_end_io_dio(): io_end 0x%p " "for inode %lu, iocb 0x%p, offset %llu, size %zd\n", - iocb->private, io_end->inode->i_ino, iocb, offset, - size); + io_end, io_end->inode->i_ino, iocb, offset, size); - iocb->private = NULL; io_end->offset = offset; io_end->size = size; ext4_put_io_end(io_end); @@ -3211,7 +3337,6 @@ static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter, get_block_t *get_block_func = NULL; int dio_flags = 0; loff_t final_size = offset + count; - ext4_io_end_t *io_end = NULL; /* Use the old path for reads and writes beyond i_size. */ if (iov_iter_rw(iter) != WRITE || final_size > inode->i_size) @@ -3236,16 +3361,17 @@ static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter, /* * We could direct write to holes and fallocate. * - * Allocated blocks to fill the hole are marked as - * unwritten to prevent parallel buffered read to expose - * the stale data before DIO complete the data IO. + * Allocated blocks to fill the hole are marked as unwritten to prevent + * parallel buffered read to expose the stale data before DIO complete + * the data IO. * - * As to previously fallocated extents, ext4 get_block will - * just simply mark the buffer mapped but still keep the - * extents unwritten. + * As to previously fallocated extents, ext4 get_block will just simply + * mark the buffer mapped but still keep the extents unwritten. * - * For non AIO case, we will convert those unwritten extents - * to written after return back from blockdev_direct_IO. + * For non AIO case, we will convert those unwritten extents to written + * after return back from blockdev_direct_IO. That way we save us from + * allocating io_end structure and also the overhead of offloading + * the extent convertion to a workqueue. * * For async DIO, the conversion needs to be deferred when the * IO is completed. The ext4 end_io callback function will be @@ -3253,30 +3379,13 @@ static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter, * case, we allocate an io_end structure to hook to the iocb. */ iocb->private = NULL; - ext4_inode_aio_set(inode, NULL); - if (!is_sync_kiocb(iocb)) { - io_end = ext4_init_io_end(inode, GFP_NOFS); - if (!io_end) { - ret = -ENOMEM; - goto retake_lock; - } - /* - * Grab reference for DIO. Will be dropped in ext4_end_io_dio() - */ - iocb->private = ext4_get_io_end(io_end); - /* - * we save the io structure for current async direct - * IO, so that later ext4_map_blocks() could flag the - * io structure whether there is a unwritten extents - * needs to be converted when IO is completed. - */ - ext4_inode_aio_set(inode, io_end); - } - - if (overwrite) { - get_block_func = ext4_get_block_overwrite; + if (overwrite) + get_block_func = ext4_dio_get_block_overwrite; + else if (is_sync_kiocb(iocb)) { + get_block_func = ext4_dio_get_block_unwritten_sync; + dio_flags = DIO_LOCKING; } else { - get_block_func = ext4_get_block_write; + get_block_func = ext4_dio_get_block_unwritten_async; dio_flags = DIO_LOCKING; } #ifdef CONFIG_EXT4_FS_ENCRYPTION @@ -3291,27 +3400,6 @@ static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter, get_block_func, ext4_end_io_dio, NULL, dio_flags); - /* - * Put our reference to io_end. This can free the io_end structure e.g. - * in sync IO case or in case of error. It can even perform extent - * conversion if all bios we submitted finished before we got here. - * Note that in that case iocb->private can be already set to NULL - * here. - */ - if (io_end) { - ext4_inode_aio_set(inode, NULL); - ext4_put_io_end(io_end); - /* - * When no IO was submitted ext4_end_io_dio() was not - * called so we have to put iocb's reference. - */ - if (ret <= 0 && ret != -EIOCBQUEUED && iocb->private) { - WARN_ON(iocb->private != io_end); - WARN_ON(io_end->flag & EXT4_IO_END_UNWRITTEN); - ext4_put_io_end(io_end); - iocb->private = NULL; - } - } if (ret > 0 && !overwrite && ext4_test_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN)) { int err; @@ -3326,7 +3414,6 @@ static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter, ext4_clear_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN); } -retake_lock: if (iov_iter_rw(iter) == WRITE) inode_dio_end(inode); /* take i_mutex locking again if we do a ovewrite dio */ @@ -4127,7 +4214,7 @@ void ext4_set_inode_flags(struct inode *inode) new_fl |= S_NOATIME; if (flags & EXT4_DIRSYNC_FL) new_fl |= S_DIRSYNC; - if (test_opt(inode->i_sb, DAX)) + if (test_opt(inode->i_sb, DAX) && S_ISREG(inode->i_mode)) new_fl |= S_DAX; inode_set_flags(inode, new_fl, S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|S_DAX); @@ -5229,6 +5316,8 @@ int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode) might_sleep(); trace_ext4_mark_inode_dirty(inode, _RET_IP_); err = ext4_reserve_inode_write(handle, inode, &iloc); + if (err) + return err; if (ext4_handle_valid(handle) && EXT4_I(inode)->i_extra_isize < sbi->s_want_extra_isize && !ext4_test_inode_state(inode, EXT4_STATE_NO_EXPAND)) { @@ -5259,9 +5348,7 @@ int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode) } } } - if (!err) - err = ext4_mark_iloc_dirty(handle, inode, &iloc); - return err; + return ext4_mark_iloc_dirty(handle, inode, &iloc); } /* @@ -5470,7 +5557,7 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) unlock_page(page); /* OK, we need to fill the hole... */ if (ext4_should_dioread_nolock(inode)) - get_block = ext4_get_block_write; + get_block = ext4_get_block_unwritten; else get_block = ext4_get_block; retry_alloc: @@ -5513,3 +5600,70 @@ int ext4_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) return err; } + +/* + * Find the first extent at or after @lblk in an inode that is not a hole. + * Search for @map_len blocks at most. The extent is returned in @result. + * + * The function returns 1 if we found an extent. The function returns 0 in + * case there is no extent at or after @lblk and in that case also sets + * @result->es_len to 0. In case of error, the error code is returned. + */ +int ext4_get_next_extent(struct inode *inode, ext4_lblk_t lblk, + unsigned int map_len, struct extent_status *result) +{ + struct ext4_map_blocks map; + struct extent_status es = {}; + int ret; + + map.m_lblk = lblk; + map.m_len = map_len; + + /* + * For non-extent based files this loop may iterate several times since + * we do not determine full hole size. + */ + while (map.m_len > 0) { + ret = ext4_map_blocks(NULL, inode, &map, 0); + if (ret < 0) + return ret; + /* There's extent covering m_lblk? Just return it. */ + if (ret > 0) { + int status; + + ext4_es_store_pblock(result, map.m_pblk); + result->es_lblk = map.m_lblk; + result->es_len = map.m_len; + if (map.m_flags & EXT4_MAP_UNWRITTEN) + status = EXTENT_STATUS_UNWRITTEN; + else + status = EXTENT_STATUS_WRITTEN; + ext4_es_store_status(result, status); + return 1; + } + ext4_es_find_delayed_extent_range(inode, map.m_lblk, + map.m_lblk + map.m_len - 1, + &es); + /* Is delalloc data before next block in extent tree? */ + if (es.es_len && es.es_lblk < map.m_lblk + map.m_len) { + ext4_lblk_t offset = 0; + + if (es.es_lblk < lblk) + offset = lblk - es.es_lblk; + result->es_lblk = es.es_lblk + offset; + ext4_es_store_pblock(result, + ext4_es_pblock(&es) + offset); + result->es_len = es.es_len - offset; + ext4_es_store_status(result, ext4_es_status(&es)); + + return 1; + } + /* There's a hole at m_lblk, advance us after it */ + map.m_lblk += map.m_len; + map_len -= map.m_len; + map.m_len = map_len; + cond_resched(); + } + result->es_len = 0; + return 0; +} diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 0f6c369..eae5917 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -208,7 +208,7 @@ static int ext4_ioctl_setflags(struct inode *inode, { struct ext4_inode_info *ei = EXT4_I(inode); handle_t *handle = NULL; - int err = EPERM, migrate = 0; + int err = -EPERM, migrate = 0; struct ext4_iloc iloc; unsigned int oldflags, mask, i; unsigned int jflag; @@ -583,6 +583,11 @@ group_extend_out: "Online defrag not supported with bigalloc"); err = -EOPNOTSUPP; goto mext_out; + } else if (IS_DAX(inode)) { + ext4_msg(sb, KERN_ERR, + "Online defrag not supported with DAX"); + err = -EOPNOTSUPP; + goto mext_out; } err = mnt_want_write_file(filp); diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 61eaf74..50e05df 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -11,7 +11,7 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * - * You should have received a copy of the GNU General Public Licens + * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111- */ @@ -815,7 +815,7 @@ static void mb_regenerate_buddy(struct ext4_buddy *e4b) * for this page; do not hold this lock when calling this routine! */ -static int ext4_mb_init_cache(struct page *page, char *incore) +static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp) { ext4_group_t ngroups; int blocksize; @@ -848,7 +848,7 @@ static int ext4_mb_init_cache(struct page *page, char *incore) /* allocate buffer_heads to read bitmaps */ if (groups_per_page > 1) { i = sizeof(struct buffer_head *) * groups_per_page; - bh = kzalloc(i, GFP_NOFS); + bh = kzalloc(i, gfp); if (bh == NULL) { err = -ENOMEM; goto out; @@ -983,7 +983,7 @@ out: * are on the same page e4b->bd_buddy_page is NULL and return value is 0. */ static int ext4_mb_get_buddy_page_lock(struct super_block *sb, - ext4_group_t group, struct ext4_buddy *e4b) + ext4_group_t group, struct ext4_buddy *e4b, gfp_t gfp) { struct inode *inode = EXT4_SB(sb)->s_buddy_cache; int block, pnum, poff; @@ -1002,7 +1002,7 @@ static int ext4_mb_get_buddy_page_lock(struct super_block *sb, block = group * 2; pnum = block / blocks_per_page; poff = block % blocks_per_page; - page = find_or_create_page(inode->i_mapping, pnum, GFP_NOFS); + page = find_or_create_page(inode->i_mapping, pnum, gfp); if (!page) return -ENOMEM; BUG_ON(page->mapping != inode->i_mapping); @@ -1016,7 +1016,7 @@ static int ext4_mb_get_buddy_page_lock(struct super_block *sb, block++; pnum = block / blocks_per_page; - page = find_or_create_page(inode->i_mapping, pnum, GFP_NOFS); + page = find_or_create_page(inode->i_mapping, pnum, gfp); if (!page) return -ENOMEM; BUG_ON(page->mapping != inode->i_mapping); @@ -1042,7 +1042,7 @@ static void ext4_mb_put_buddy_page_lock(struct ext4_buddy *e4b) * calling this routine! */ static noinline_for_stack -int ext4_mb_init_group(struct super_block *sb, ext4_group_t group) +int ext4_mb_init_group(struct super_block *sb, ext4_group_t group, gfp_t gfp) { struct ext4_group_info *this_grp; @@ -1062,7 +1062,7 @@ int ext4_mb_init_group(struct super_block *sb, ext4_group_t group) * The call to ext4_mb_get_buddy_page_lock will mark the * page accessed. */ - ret = ext4_mb_get_buddy_page_lock(sb, group, &e4b); + ret = ext4_mb_get_buddy_page_lock(sb, group, &e4b, gfp); if (ret || !EXT4_MB_GRP_NEED_INIT(this_grp)) { /* * somebody initialized the group @@ -1072,7 +1072,7 @@ int ext4_mb_init_group(struct super_block *sb, ext4_group_t group) } page = e4b.bd_bitmap_page; - ret = ext4_mb_init_cache(page, NULL); + ret = ext4_mb_init_cache(page, NULL, gfp); if (ret) goto err; if (!PageUptodate(page)) { @@ -1091,7 +1091,7 @@ int ext4_mb_init_group(struct super_block *sb, ext4_group_t group) } /* init buddy cache */ page = e4b.bd_buddy_page; - ret = ext4_mb_init_cache(page, e4b.bd_bitmap); + ret = ext4_mb_init_cache(page, e4b.bd_bitmap, gfp); if (ret) goto err; if (!PageUptodate(page)) { @@ -1109,8 +1109,8 @@ err: * calling this routine! */ static noinline_for_stack int -ext4_mb_load_buddy(struct super_block *sb, ext4_group_t group, - struct ext4_buddy *e4b) +ext4_mb_load_buddy_gfp(struct super_block *sb, ext4_group_t group, + struct ext4_buddy *e4b, gfp_t gfp) { int blocks_per_page; int block; @@ -1140,7 +1140,7 @@ ext4_mb_load_buddy(struct super_block *sb, ext4_group_t group, * we need full data about the group * to make a good selection */ - ret = ext4_mb_init_group(sb, group); + ret = ext4_mb_init_group(sb, group, gfp); if (ret) return ret; } @@ -1168,11 +1168,11 @@ ext4_mb_load_buddy(struct super_block *sb, ext4_group_t group, * wait for it to initialize. */ page_cache_release(page); - page = find_or_create_page(inode->i_mapping, pnum, GFP_NOFS); + page = find_or_create_page(inode->i_mapping, pnum, gfp); if (page) { BUG_ON(page->mapping != inode->i_mapping); if (!PageUptodate(page)) { - ret = ext4_mb_init_cache(page, NULL); + ret = ext4_mb_init_cache(page, NULL, gfp); if (ret) { unlock_page(page); goto err; @@ -1204,11 +1204,12 @@ ext4_mb_load_buddy(struct super_block *sb, ext4_group_t group, if (page == NULL || !PageUptodate(page)) { if (page) page_cache_release(page); - page = find_or_create_page(inode->i_mapping, pnum, GFP_NOFS); + page = find_or_create_page(inode->i_mapping, pnum, gfp); if (page) { BUG_ON(page->mapping != inode->i_mapping); if (!PageUptodate(page)) { - ret = ext4_mb_init_cache(page, e4b->bd_bitmap); + ret = ext4_mb_init_cache(page, e4b->bd_bitmap, + gfp); if (ret) { unlock_page(page); goto err; @@ -1247,6 +1248,12 @@ err: return ret; } +static int ext4_mb_load_buddy(struct super_block *sb, ext4_group_t group, + struct ext4_buddy *e4b) +{ + return ext4_mb_load_buddy_gfp(sb, group, e4b, GFP_NOFS); +} + static void ext4_mb_unload_buddy(struct ext4_buddy *e4b) { if (e4b->bd_bitmap_page) @@ -2045,7 +2052,7 @@ static int ext4_mb_good_group(struct ext4_allocation_context *ac, /* We only do this if the grp has never been initialized */ if (unlikely(EXT4_MB_GRP_NEED_INIT(grp))) { - int ret = ext4_mb_init_group(ac->ac_sb, group); + int ret = ext4_mb_init_group(ac->ac_sb, group, GFP_NOFS); if (ret) return ret; } @@ -2285,7 +2292,7 @@ static int ext4_mb_seq_groups_show(struct seq_file *seq, void *v) if (group == 0) seq_puts(seq, "#group: free frags first [" " 2^0 2^1 2^2 2^3 2^4 2^5 2^6 " - " 2^7 2^8 2^9 2^10 2^11 2^12 2^13 ]"); + " 2^7 2^8 2^9 2^10 2^11 2^12 2^13 ]\n"); i = (sb->s_blocksize_bits + 2) * sizeof(sg.info.bb_counters[0]) + sizeof(struct ext4_group_info); @@ -4695,16 +4702,6 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode, } /* - * We need to make sure we don't reuse the freed block until - * after the transaction is committed, which we can do by - * treating the block as metadata, below. We make an - * exception if the inode is to be written in writeback mode - * since writeback mode has weak data consistency guarantees. - */ - if (!ext4_should_writeback_data(inode)) - flags |= EXT4_FREE_BLOCKS_METADATA; - - /* * If the extent to be freed does not begin on a cluster * boundary, we need to deal with partial clusters at the * beginning and end of the extent. Normally we will free @@ -4738,14 +4735,13 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode, if (!bh && (flags & EXT4_FREE_BLOCKS_FORGET)) { int i; + int is_metadata = flags & EXT4_FREE_BLOCKS_METADATA; for (i = 0; i < count; i++) { cond_resched(); - bh = sb_find_get_block(inode->i_sb, block + i); - if (!bh) - continue; - ext4_forget(handle, flags & EXT4_FREE_BLOCKS_METADATA, - inode, bh, block + i); + if (is_metadata) + bh = sb_find_get_block(inode->i_sb, block + i); + ext4_forget(handle, is_metadata, inode, bh, block + i); } } @@ -4815,16 +4811,23 @@ do_more: #endif trace_ext4_mballoc_free(sb, inode, block_group, bit, count_clusters); - err = ext4_mb_load_buddy(sb, block_group, &e4b); + /* __GFP_NOFAIL: retry infinitely, ignore TIF_MEMDIE and memcg limit. */ + err = ext4_mb_load_buddy_gfp(sb, block_group, &e4b, + GFP_NOFS|__GFP_NOFAIL); if (err) goto error_return; - if ((flags & EXT4_FREE_BLOCKS_METADATA) && ext4_handle_valid(handle)) { + /* + * We need to make sure we don't reuse the freed block until after the + * transaction is committed. We make an exception if the inode is to be + * written in writeback mode since writeback mode has weak data + * consistency guarantees. + */ + if (ext4_handle_valid(handle) && + ((flags & EXT4_FREE_BLOCKS_METADATA) || + !ext4_should_writeback_data(inode))) { struct ext4_free_data *new_entry; /* - * blocks being freed are metadata. these blocks shouldn't - * be used until this transaction is committed - * * We use __GFP_NOFAIL because ext4_free_blocks() is not allowed * to fail. */ @@ -5217,7 +5220,7 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range) grp = ext4_get_group_info(sb, group); /* We only do this if the grp has never been initialized */ if (unlikely(EXT4_MB_GRP_NEED_INIT(grp))) { - ret = ext4_mb_init_group(sb, group); + ret = ext4_mb_init_group(sb, group, GFP_NOFS); if (ret) break; } diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h index d634e18..3ef1df6 100644 --- a/fs/ext4/mballoc.h +++ b/fs/ext4/mballoc.h @@ -23,18 +23,6 @@ #include "ext4.h" /* - * with AGGRESSIVE_CHECK allocator runs consistency checks over - * structures. these checks slow things down a lot - */ -#define AGGRESSIVE_CHECK__ - -/* - * with DOUBLE_CHECK defined mballoc creates persistent in-core - * bitmaps, maintains and uses them to check for double allocations - */ -#define DOUBLE_CHECK__ - -/* */ #ifdef CONFIG_EXT4_DEBUG extern ushort ext4_mballoc_debug; diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c index a465189..364ea4d 100644 --- a/fs/ext4/migrate.c +++ b/fs/ext4/migrate.c @@ -361,7 +361,7 @@ static int ext4_ext_swap_inode_data(handle_t *handle, struct inode *inode, * blocks. * * While converting to extents we need not - * update the orignal inode i_blocks for extent blocks + * update the original inode i_blocks for extent blocks * via quota APIs. The quota update happened via tmp_inode already. */ spin_lock(&inode->i_lock); diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c index 0a512aa..2444527 100644 --- a/fs/ext4/mmp.c +++ b/fs/ext4/mmp.c @@ -91,21 +91,22 @@ static int read_mmp_block(struct super_block *sb, struct buffer_head **bh, submit_bh(READ_SYNC | REQ_META | REQ_PRIO, *bh); wait_on_buffer(*bh); if (!buffer_uptodate(*bh)) { - brelse(*bh); - *bh = NULL; ret = -EIO; goto warn_exit; } - mmp = (struct mmp_struct *)((*bh)->b_data); - if (le32_to_cpu(mmp->mmp_magic) != EXT4_MMP_MAGIC) + if (le32_to_cpu(mmp->mmp_magic) != EXT4_MMP_MAGIC) { ret = -EFSCORRUPTED; - else if (!ext4_mmp_csum_verify(sb, mmp)) + goto warn_exit; + } + if (!ext4_mmp_csum_verify(sb, mmp)) { ret = -EFSBADCRC; - else - return 0; - + goto warn_exit; + } + return 0; warn_exit: + brelse(*bh); + *bh = NULL; ext4_warning(sb, "Error %d while reading MMP block %llu", ret, mmp_block); return ret; @@ -181,15 +182,13 @@ static int kmmpd(void *data) EXT4_FEATURE_INCOMPAT_MMP)) { ext4_warning(sb, "kmmpd being stopped since MMP feature" " has been disabled."); - EXT4_SB(sb)->s_mmp_tsk = NULL; - goto failed; + goto exit_thread; } if (sb->s_flags & MS_RDONLY) { ext4_warning(sb, "kmmpd being stopped since filesystem " "has been remounted as readonly."); - EXT4_SB(sb)->s_mmp_tsk = NULL; - goto failed; + goto exit_thread; } diff = jiffies - last_update_time; @@ -211,9 +210,7 @@ static int kmmpd(void *data) if (retval) { ext4_error(sb, "error reading MMP data: %d", retval); - - EXT4_SB(sb)->s_mmp_tsk = NULL; - goto failed; + goto exit_thread; } mmp_check = (struct mmp_struct *)(bh_check->b_data); @@ -225,7 +222,9 @@ static int kmmpd(void *data) "The filesystem seems to have been" " multiply mounted."); ext4_error(sb, "abort"); - goto failed; + put_bh(bh_check); + retval = -EBUSY; + goto exit_thread; } put_bh(bh_check); } @@ -248,7 +247,8 @@ static int kmmpd(void *data) retval = write_mmp_block(sb, bh); -failed: +exit_thread: + EXT4_SB(sb)->s_mmp_tsk = NULL; kfree(data); brelse(bh); return retval; diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index fb6f117..4098acc 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -265,11 +265,12 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode, ext4_lblk_t orig_blk_offset, donor_blk_offset; unsigned long blocksize = orig_inode->i_sb->s_blocksize; unsigned int tmp_data_size, data_size, replaced_size; - int err2, jblocks, retries = 0; + int i, err2, jblocks, retries = 0; int replaced_count = 0; int from = data_offset_in_page << orig_inode->i_blkbits; int blocks_per_page = PAGE_CACHE_SIZE >> orig_inode->i_blkbits; struct super_block *sb = orig_inode->i_sb; + struct buffer_head *bh = NULL; /* * It needs twice the amount of ordinary journal buffers because @@ -380,8 +381,17 @@ data_copy: } /* Perform all necessary steps similar write_begin()/write_end() * but keeping in mind that i_size will not change */ - *err = __block_write_begin(pagep[0], from, replaced_size, - ext4_get_block); + if (!page_has_buffers(pagep[0])) + create_empty_buffers(pagep[0], 1 << orig_inode->i_blkbits, 0); + bh = page_buffers(pagep[0]); + for (i = 0; i < data_offset_in_page; i++) + bh = bh->b_this_page; + for (i = 0; i < block_len_in_page; i++) { + *err = ext4_get_block(orig_inode, orig_blk_offset + i, bh, 0); + if (*err < 0) + break; + bh = bh->b_this_page; + } if (!*err) *err = block_commit_write(pagep[0], from, from + replaced_size); diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 06574dd..48e4b89 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -1558,6 +1558,24 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi struct ext4_dir_entry_2 *de; struct buffer_head *bh; + if (ext4_encrypted_inode(dir)) { + int res = ext4_get_encryption_info(dir); + + /* + * This should be a properly defined flag for + * dentry->d_flags when we uplift this to the VFS. + * d_fsdata is set to (void *) 1 if if the dentry is + * created while the directory was encrypted and we + * don't have access to the key. + */ + dentry->d_fsdata = NULL; + if (ext4_encryption_info(dir)) + dentry->d_fsdata = (void *) 1; + d_set_d_op(dentry, &ext4_encrypted_d_ops); + if (res && res != -ENOKEY) + return ERR_PTR(res); + } + if (dentry->d_name.len > EXT4_NAME_LEN) return ERR_PTR(-ENAMETOOLONG); @@ -1585,11 +1603,15 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi return ERR_PTR(-EFSCORRUPTED); } if (!IS_ERR(inode) && ext4_encrypted_inode(dir) && - (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || - S_ISLNK(inode->i_mode)) && + (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && !ext4_is_child_context_consistent_with_parent(dir, inode)) { + int nokey = ext4_encrypted_inode(inode) && + !ext4_encryption_info(inode); + iput(inode); + if (nokey) + return ERR_PTR(-ENOKEY); ext4_warning(inode->i_sb, "Inconsistent encryption contexts: %lu/%lu\n", (unsigned long) dir->i_ino, diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 090b349..349d7aa 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -128,9 +128,6 @@ static void ext4_release_io_end(ext4_io_end_t *io_end) BUG_ON(io_end->flag & EXT4_IO_END_UNWRITTEN); WARN_ON(io_end->handle); - if (atomic_dec_and_test(&EXT4_I(io_end->inode)->i_ioend_count)) - wake_up_all(ext4_ioend_wq(io_end->inode)); - for (bio = io_end->bio; bio; bio = next_bio) { next_bio = bio->bi_private; ext4_finish_bio(bio); @@ -265,7 +262,6 @@ ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags) { ext4_io_end_t *io = kmem_cache_zalloc(io_end_cachep, flags); if (io) { - atomic_inc(&EXT4_I(inode)->i_ioend_count); io->inode = inode; INIT_LIST_HEAD(&io->list); atomic_set(&io->count, 1); diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index ad62d7a..34038e3 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -198,7 +198,7 @@ static struct ext4_new_flex_group_data *alloc_flex_gd(unsigned long flexbg_size) if (flex_gd == NULL) goto out3; - if (flexbg_size >= UINT_MAX / sizeof(struct ext4_new_flex_group_data)) + if (flexbg_size >= UINT_MAX / sizeof(struct ext4_new_group_data)) goto out2; flex_gd->count = flexbg_size; diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 3ed01ec..99996e9 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -55,7 +55,6 @@ static struct ext4_lazy_init *ext4_li_info; static struct mutex ext4_li_mtx; -static int ext4_mballoc_ready; static struct ratelimit_state ext4_mount_msg_ratelimit; static int ext4_load_journal(struct super_block *, struct ext4_super_block *, @@ -844,7 +843,6 @@ static void ext4_put_super(struct super_block *sb) ext4_release_system_zone(sb); ext4_mb_release(sb); ext4_ext_release(sb); - ext4_xattr_put_super(sb); if (!(sb->s_flags & MS_RDONLY)) { ext4_clear_feature_journal_needs_recovery(sb); @@ -944,7 +942,6 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) spin_lock_init(&ei->i_completed_io_lock); ei->i_sync_tid = 0; ei->i_datasync_tid = 0; - atomic_set(&ei->i_ioend_count, 0); atomic_set(&ei->i_unwritten, 0); INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); #ifdef CONFIG_EXT4_FS_ENCRYPTION @@ -1425,9 +1422,9 @@ static const struct mount_opts { {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, - MOPT_NO_EXT2 | MOPT_SET}, + MOPT_NO_EXT2}, {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, - MOPT_NO_EXT2 | MOPT_CLEAR}, + MOPT_NO_EXT2}, {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, @@ -1705,6 +1702,10 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token, ext4_msg(sb, KERN_INFO, "dax option not supported"); return -1; #endif + } else if (token == Opt_data_err_abort) { + sbi->s_mount_opt |= m->mount_opt; + } else if (token == Opt_data_err_ignore) { + sbi->s_mount_opt &= ~m->mount_opt; } else { if (!args->from) arg = 1; @@ -1914,6 +1915,8 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); if (nodefs || sbi->s_max_dir_size_kb) SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); + if (test_opt(sb, DATA_ERR_ABORT)) + SEQ_OPTS_PUTS("data_err=abort"); ext4_show_quota_options(seq, sb); return 0; @@ -3796,12 +3799,10 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; no_journal: - if (ext4_mballoc_ready) { - sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); - if (!sbi->s_mb_cache) { - ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); - goto failed_mount_wq; - } + sbi->s_mb_cache = ext4_xattr_create_cache(); + if (!sbi->s_mb_cache) { + ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); + goto failed_mount_wq; } if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && @@ -4027,6 +4028,10 @@ failed_mount4: if (EXT4_SB(sb)->rsv_conversion_wq) destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); failed_mount_wq: + if (sbi->s_mb_cache) { + ext4_xattr_destroy_cache(sbi->s_mb_cache); + sbi->s_mb_cache = NULL; + } if (sbi->s_journal) { jbd2_journal_destroy(sbi->s_journal); sbi->s_journal = NULL; @@ -5321,7 +5326,6 @@ MODULE_ALIAS_FS("ext4"); /* Shared across all ext4 file systems */ wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; -struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; static int __init ext4_init_fs(void) { @@ -5334,10 +5338,8 @@ static int __init ext4_init_fs(void) /* Build-time check for flags consistency */ ext4_check_flag_values(); - for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { - mutex_init(&ext4__aio_mutex[i]); + for (i = 0; i < EXT4_WQ_HASH_SZ; i++) init_waitqueue_head(&ext4__ioend_wq[i]); - } err = ext4_init_es(); if (err) @@ -5358,8 +5360,6 @@ static int __init ext4_init_fs(void) err = ext4_init_mballoc(); if (err) goto out2; - else - ext4_mballoc_ready = 1; err = init_inodecache(); if (err) goto out1; @@ -5375,7 +5375,6 @@ out: unregister_as_ext3(); destroy_inodecache(); out1: - ext4_mballoc_ready = 0; ext4_exit_mballoc(); out2: ext4_exit_sysfs(); diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index a95151e..0441e05 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -545,30 +545,44 @@ static void ext4_xattr_release_block(handle_t *handle, struct inode *inode, struct buffer_head *bh) { - struct mb_cache_entry *ce = NULL; - int error = 0; struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); + u32 hash, ref; + int error = 0; - ce = mb_cache_entry_get(ext4_mb_cache, bh->b_bdev, bh->b_blocknr); BUFFER_TRACE(bh, "get_write_access"); error = ext4_journal_get_write_access(handle, bh); if (error) goto out; lock_buffer(bh); - if (BHDR(bh)->h_refcount == cpu_to_le32(1)) { + hash = le32_to_cpu(BHDR(bh)->h_hash); + ref = le32_to_cpu(BHDR(bh)->h_refcount); + if (ref == 1) { ea_bdebug(bh, "refcount now=0; freeing"); - if (ce) - mb_cache_entry_free(ce); + /* + * This must happen under buffer lock for + * ext4_xattr_block_set() to reliably detect freed block + */ + mb_cache_entry_delete_block(ext4_mb_cache, hash, bh->b_blocknr); get_bh(bh); unlock_buffer(bh); ext4_free_blocks(handle, inode, bh, 0, 1, EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET); } else { - le32_add_cpu(&BHDR(bh)->h_refcount, -1); - if (ce) - mb_cache_entry_release(ce); + ref--; + BHDR(bh)->h_refcount = cpu_to_le32(ref); + if (ref == EXT4_XATTR_REFCOUNT_MAX - 1) { + struct mb_cache_entry *ce; + + ce = mb_cache_entry_get(ext4_mb_cache, hash, + bh->b_blocknr); + if (ce) { + ce->e_reusable = 1; + mb_cache_entry_put(ext4_mb_cache, ce); + } + } + /* * Beware of this ugliness: Releasing of xattr block references * from different inodes can race and so we have to protect @@ -790,8 +804,6 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, if (i->value && i->value_len > sb->s_blocksize) return -ENOSPC; if (s->base) { - ce = mb_cache_entry_get(ext4_mb_cache, bs->bh->b_bdev, - bs->bh->b_blocknr); BUFFER_TRACE(bs->bh, "get_write_access"); error = ext4_journal_get_write_access(handle, bs->bh); if (error) @@ -799,10 +811,15 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, lock_buffer(bs->bh); if (header(s->base)->h_refcount == cpu_to_le32(1)) { - if (ce) { - mb_cache_entry_free(ce); - ce = NULL; - } + __u32 hash = le32_to_cpu(BHDR(bs->bh)->h_hash); + + /* + * This must happen under buffer lock for + * ext4_xattr_block_set() to reliably detect modified + * block + */ + mb_cache_entry_delete_block(ext4_mb_cache, hash, + bs->bh->b_blocknr); ea_bdebug(bs->bh, "modifying in-place"); error = ext4_xattr_set_entry(i, s); if (!error) { @@ -826,10 +843,6 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, int offset = (char *)s->here - bs->bh->b_data; unlock_buffer(bs->bh); - if (ce) { - mb_cache_entry_release(ce); - ce = NULL; - } ea_bdebug(bs->bh, "cloning"); s->base = kmalloc(bs->bh->b_size, GFP_NOFS); error = -ENOMEM; @@ -872,6 +885,8 @@ inserted: if (new_bh == bs->bh) ea_bdebug(new_bh, "keeping"); else { + u32 ref; + /* The old block is released after updating the inode. */ error = dquot_alloc_block(inode, @@ -884,9 +899,40 @@ inserted: if (error) goto cleanup_dquot; lock_buffer(new_bh); - le32_add_cpu(&BHDR(new_bh)->h_refcount, 1); + /* + * We have to be careful about races with + * freeing, rehashing or adding references to + * xattr block. Once we hold buffer lock xattr + * block's state is stable so we can check + * whether the block got freed / rehashed or + * not. Since we unhash mbcache entry under + * buffer lock when freeing / rehashing xattr + * block, checking whether entry is still + * hashed is reliable. Same rules hold for + * e_reusable handling. + */ + if (hlist_bl_unhashed(&ce->e_hash_list) || + !ce->e_reusable) { + /* + * Undo everything and check mbcache + * again. + */ + unlock_buffer(new_bh); + dquot_free_block(inode, + EXT4_C2B(EXT4_SB(sb), + 1)); + brelse(new_bh); + mb_cache_entry_put(ext4_mb_cache, ce); + ce = NULL; + new_bh = NULL; + goto inserted; + } + ref = le32_to_cpu(BHDR(new_bh)->h_refcount) + 1; + BHDR(new_bh)->h_refcount = cpu_to_le32(ref); + if (ref >= EXT4_XATTR_REFCOUNT_MAX) + ce->e_reusable = 0; ea_bdebug(new_bh, "reusing; refcount now=%d", - le32_to_cpu(BHDR(new_bh)->h_refcount)); + ref); unlock_buffer(new_bh); error = ext4_handle_dirty_xattr_block(handle, inode, @@ -894,7 +940,8 @@ inserted: if (error) goto cleanup_dquot; } - mb_cache_entry_release(ce); + mb_cache_entry_touch(ext4_mb_cache, ce); + mb_cache_entry_put(ext4_mb_cache, ce); ce = NULL; } else if (bs->bh && s->base == bs->bh->b_data) { /* We were modifying this block in-place. */ @@ -959,7 +1006,7 @@ getblk_failed: cleanup: if (ce) - mb_cache_entry_release(ce); + mb_cache_entry_put(ext4_mb_cache, ce); brelse(new_bh); if (!(bs->bh && s->base == bs->bh->b_data)) kfree(s->base); @@ -1070,6 +1117,17 @@ static int ext4_xattr_ibody_set(handle_t *handle, struct inode *inode, return 0; } +static int ext4_xattr_value_same(struct ext4_xattr_search *s, + struct ext4_xattr_info *i) +{ + void *value; + + if (le32_to_cpu(s->here->e_value_size) != i->value_len) + return 0; + value = ((void *)s->base) + le16_to_cpu(s->here->e_value_offs); + return !memcmp(value, i->value, i->value_len); +} + /* * ext4_xattr_set_handle() * @@ -1146,6 +1204,13 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index, else if (!bs.s.not_found) error = ext4_xattr_block_set(handle, inode, &i, &bs); } else { + error = 0; + /* Xattr value did not change? Save us some work and bail out */ + if (!is.s.not_found && ext4_xattr_value_same(&is.s, &i)) + goto cleanup; + if (!bs.s.not_found && ext4_xattr_value_same(&bs.s, &i)) + goto cleanup; + error = ext4_xattr_ibody_set(handle, inode, &i, &is); if (!error && !bs.s.not_found) { i.value = NULL; @@ -1512,17 +1577,6 @@ cleanup: } /* - * ext4_xattr_put_super() - * - * This is called when a file system is unmounted. - */ -void -ext4_xattr_put_super(struct super_block *sb) -{ - mb_cache_shrink(sb->s_bdev); -} - -/* * ext4_xattr_cache_insert() * * Create a new entry in the extended attribute cache, and insert @@ -1533,26 +1587,19 @@ ext4_xattr_put_super(struct super_block *sb) static void ext4_xattr_cache_insert(struct mb_cache *ext4_mb_cache, struct buffer_head *bh) { - __u32 hash = le32_to_cpu(BHDR(bh)->h_hash); - struct mb_cache_entry *ce; + struct ext4_xattr_header *header = BHDR(bh); + __u32 hash = le32_to_cpu(header->h_hash); + int reusable = le32_to_cpu(header->h_refcount) < + EXT4_XATTR_REFCOUNT_MAX; int error; - ce = mb_cache_entry_alloc(ext4_mb_cache, GFP_NOFS); - if (!ce) { - ea_bdebug(bh, "out of memory"); - return; - } - error = mb_cache_entry_insert(ce, bh->b_bdev, bh->b_blocknr, hash); + error = mb_cache_entry_create(ext4_mb_cache, GFP_NOFS, hash, + bh->b_blocknr, reusable); if (error) { - mb_cache_entry_free(ce); - if (error == -EBUSY) { + if (error == -EBUSY) ea_bdebug(bh, "already in cache"); - error = 0; - } - } else { + } else ea_bdebug(bh, "inserting [%x]", (int)hash); - mb_cache_entry_release(ce); - } } /* @@ -1614,33 +1661,20 @@ ext4_xattr_cache_find(struct inode *inode, struct ext4_xattr_header *header, if (!header->h_hash) return NULL; /* never share */ ea_idebug(inode, "looking for cached blocks [%x]", (int)hash); -again: - ce = mb_cache_entry_find_first(ext4_mb_cache, inode->i_sb->s_bdev, - hash); + ce = mb_cache_entry_find_first(ext4_mb_cache, hash); while (ce) { struct buffer_head *bh; - if (IS_ERR(ce)) { - if (PTR_ERR(ce) == -EAGAIN) - goto again; - break; - } bh = sb_bread(inode->i_sb, ce->e_block); if (!bh) { EXT4_ERROR_INODE(inode, "block %lu read error", (unsigned long) ce->e_block); - } else if (le32_to_cpu(BHDR(bh)->h_refcount) >= - EXT4_XATTR_REFCOUNT_MAX) { - ea_idebug(inode, "block %lu refcount %d>=%d", - (unsigned long) ce->e_block, - le32_to_cpu(BHDR(bh)->h_refcount), - EXT4_XATTR_REFCOUNT_MAX); } else if (ext4_xattr_cmp(header, BHDR(bh)) == 0) { *pce = ce; return bh; } brelse(bh); - ce = mb_cache_entry_find_next(ce, inode->i_sb->s_bdev, hash); + ce = mb_cache_entry_find_next(ext4_mb_cache, ce); } return NULL; } @@ -1716,9 +1750,9 @@ static void ext4_xattr_rehash(struct ext4_xattr_header *header, #define HASH_BUCKET_BITS 10 struct mb_cache * -ext4_xattr_create_cache(char *name) +ext4_xattr_create_cache(void) { - return mb_cache_create(name, HASH_BUCKET_BITS); + return mb_cache_create(HASH_BUCKET_BITS); } void ext4_xattr_destroy_cache(struct mb_cache *cache) diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h index ddc0957..69dd3e6 100644 --- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -108,7 +108,6 @@ extern int ext4_xattr_set(struct inode *, int, const char *, const void *, size_ extern int ext4_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int); extern void ext4_xattr_delete_inode(handle_t *, struct inode *); -extern void ext4_xattr_put_super(struct super_block *); extern int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize, struct ext4_inode *raw_inode, handle_t *handle); @@ -124,7 +123,7 @@ extern int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode, struct ext4_xattr_info *i, struct ext4_xattr_ibody_find *is); -extern struct mb_cache *ext4_xattr_create_cache(char *name); +extern struct mb_cache *ext4_xattr_create_cache(void); extern void ext4_xattr_destroy_cache(struct mb_cache *); #ifdef CONFIG_EXT4_FS_SECURITY diff --git a/fs/f2fs/crypto.c b/fs/f2fs/crypto.c index 4a62ef1..95c5cf0 100644 --- a/fs/f2fs/crypto.c +++ b/fs/f2fs/crypto.c @@ -23,11 +23,9 @@ * The usage of AES-XTS should conform to recommendations in NIST * Special Publication 800-38E and IEEE P1619/D16. */ -#include <crypto/hash.h> -#include <crypto/sha.h> +#include <crypto/skcipher.h> #include <keys/user-type.h> #include <keys/encrypted-type.h> -#include <linux/crypto.h> #include <linux/ecryptfs.h> #include <linux/gfp.h> #include <linux/kernel.h> @@ -328,21 +326,21 @@ static int f2fs_page_crypto(struct f2fs_crypto_ctx *ctx, struct page *dest_page) { u8 xts_tweak[F2FS_XTS_TWEAK_SIZE]; - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; DECLARE_F2FS_COMPLETION_RESULT(ecr); struct scatterlist dst, src; struct f2fs_crypt_info *ci = F2FS_I(inode)->i_crypt_info; - struct crypto_ablkcipher *tfm = ci->ci_ctfm; + struct crypto_skcipher *tfm = ci->ci_ctfm; int res = 0; - req = ablkcipher_request_alloc(tfm, GFP_NOFS); + req = skcipher_request_alloc(tfm, GFP_NOFS); if (!req) { printk_ratelimited(KERN_ERR "%s: crypto_request_alloc() failed\n", __func__); return -ENOMEM; } - ablkcipher_request_set_callback( + skcipher_request_set_callback( req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, f2fs_crypt_complete, &ecr); @@ -355,21 +353,21 @@ static int f2fs_page_crypto(struct f2fs_crypto_ctx *ctx, sg_set_page(&dst, dest_page, PAGE_CACHE_SIZE, 0); sg_init_table(&src, 1); sg_set_page(&src, src_page, PAGE_CACHE_SIZE, 0); - ablkcipher_request_set_crypt(req, &src, &dst, PAGE_CACHE_SIZE, - xts_tweak); + skcipher_request_set_crypt(req, &src, &dst, PAGE_CACHE_SIZE, + xts_tweak); if (rw == F2FS_DECRYPT) - res = crypto_ablkcipher_decrypt(req); + res = crypto_skcipher_decrypt(req); else - res = crypto_ablkcipher_encrypt(req); + res = crypto_skcipher_encrypt(req); if (res == -EINPROGRESS || res == -EBUSY) { BUG_ON(req->base.data != &ecr); wait_for_completion(&ecr.completion); res = ecr.res; } - ablkcipher_request_free(req); + skcipher_request_free(req); if (res) { printk_ratelimited(KERN_ERR - "%s: crypto_ablkcipher_encrypt() returned %d\n", + "%s: crypto_skcipher_encrypt() returned %d\n", __func__, res); return res; } diff --git a/fs/f2fs/crypto_fname.c b/fs/f2fs/crypto_fname.c index ab377d4..16aec66 100644 --- a/fs/f2fs/crypto_fname.c +++ b/fs/f2fs/crypto_fname.c @@ -15,11 +15,9 @@ * * This has not yet undergone a rigorous security audit. */ -#include <crypto/hash.h> -#include <crypto/sha.h> +#include <crypto/skcipher.h> #include <keys/encrypted-type.h> #include <keys/user-type.h> -#include <linux/crypto.h> #include <linux/gfp.h> #include <linux/kernel.h> #include <linux/key.h> @@ -70,10 +68,10 @@ static int f2fs_fname_encrypt(struct inode *inode, const struct qstr *iname, struct f2fs_str *oname) { u32 ciphertext_len; - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; DECLARE_F2FS_COMPLETION_RESULT(ecr); struct f2fs_crypt_info *ci = F2FS_I(inode)->i_crypt_info; - struct crypto_ablkcipher *tfm = ci->ci_ctfm; + struct crypto_skcipher *tfm = ci->ci_ctfm; int res = 0; char iv[F2FS_CRYPTO_BLOCK_SIZE]; struct scatterlist src_sg, dst_sg; @@ -99,14 +97,14 @@ static int f2fs_fname_encrypt(struct inode *inode, } /* Allocate request */ - req = ablkcipher_request_alloc(tfm, GFP_NOFS); + req = skcipher_request_alloc(tfm, GFP_NOFS); if (!req) { printk_ratelimited(KERN_ERR "%s: crypto_request_alloc() failed\n", __func__); kfree(alloc_buf); return -ENOMEM; } - ablkcipher_request_set_callback(req, + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, f2fs_dir_crypt_complete, &ecr); @@ -121,15 +119,15 @@ static int f2fs_fname_encrypt(struct inode *inode, /* Create encryption request */ sg_init_one(&src_sg, workbuf, ciphertext_len); sg_init_one(&dst_sg, oname->name, ciphertext_len); - ablkcipher_request_set_crypt(req, &src_sg, &dst_sg, ciphertext_len, iv); - res = crypto_ablkcipher_encrypt(req); + skcipher_request_set_crypt(req, &src_sg, &dst_sg, ciphertext_len, iv); + res = crypto_skcipher_encrypt(req); if (res == -EINPROGRESS || res == -EBUSY) { BUG_ON(req->base.data != &ecr); wait_for_completion(&ecr.completion); res = ecr.res; } kfree(alloc_buf); - ablkcipher_request_free(req); + skcipher_request_free(req); if (res < 0) { printk_ratelimited(KERN_ERR "%s: Error (error code %d)\n", __func__, res); @@ -148,11 +146,11 @@ static int f2fs_fname_encrypt(struct inode *inode, static int f2fs_fname_decrypt(struct inode *inode, const struct f2fs_str *iname, struct f2fs_str *oname) { - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; DECLARE_F2FS_COMPLETION_RESULT(ecr); struct scatterlist src_sg, dst_sg; struct f2fs_crypt_info *ci = F2FS_I(inode)->i_crypt_info; - struct crypto_ablkcipher *tfm = ci->ci_ctfm; + struct crypto_skcipher *tfm = ci->ci_ctfm; int res = 0; char iv[F2FS_CRYPTO_BLOCK_SIZE]; unsigned lim = max_name_len(inode); @@ -161,13 +159,13 @@ static int f2fs_fname_decrypt(struct inode *inode, return -EIO; /* Allocate request */ - req = ablkcipher_request_alloc(tfm, GFP_NOFS); + req = skcipher_request_alloc(tfm, GFP_NOFS); if (!req) { printk_ratelimited(KERN_ERR "%s: crypto_request_alloc() failed\n", __func__); return -ENOMEM; } - ablkcipher_request_set_callback(req, + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, f2fs_dir_crypt_complete, &ecr); @@ -177,14 +175,14 @@ static int f2fs_fname_decrypt(struct inode *inode, /* Create decryption request */ sg_init_one(&src_sg, iname->name, iname->len); sg_init_one(&dst_sg, oname->name, oname->len); - ablkcipher_request_set_crypt(req, &src_sg, &dst_sg, iname->len, iv); - res = crypto_ablkcipher_decrypt(req); + skcipher_request_set_crypt(req, &src_sg, &dst_sg, iname->len, iv); + res = crypto_skcipher_decrypt(req); if (res == -EINPROGRESS || res == -EBUSY) { BUG_ON(req->base.data != &ecr); wait_for_completion(&ecr.completion); res = ecr.res; } - ablkcipher_request_free(req); + skcipher_request_free(req); if (res < 0) { printk_ratelimited(KERN_ERR "%s: Error in f2fs_fname_decrypt (error code %d)\n", diff --git a/fs/f2fs/crypto_key.c b/fs/f2fs/crypto_key.c index 5de2d86..2aeb627 100644 --- a/fs/f2fs/crypto_key.c +++ b/fs/f2fs/crypto_key.c @@ -14,7 +14,7 @@ #include <linux/random.h> #include <linux/scatterlist.h> #include <uapi/linux/keyctl.h> -#include <crypto/hash.h> +#include <crypto/skcipher.h> #include <linux/f2fs_fs.h> #include "f2fs.h" @@ -44,46 +44,43 @@ static int f2fs_derive_key_aes(char deriving_key[F2FS_AES_128_ECB_KEY_SIZE], char derived_key[F2FS_AES_256_XTS_KEY_SIZE]) { int res = 0; - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; DECLARE_F2FS_COMPLETION_RESULT(ecr); struct scatterlist src_sg, dst_sg; - struct crypto_ablkcipher *tfm = crypto_alloc_ablkcipher("ecb(aes)", 0, - 0); + struct crypto_skcipher *tfm = crypto_alloc_skcipher("ecb(aes)", 0, 0); if (IS_ERR(tfm)) { res = PTR_ERR(tfm); tfm = NULL; goto out; } - crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_REQ_WEAK_KEY); - req = ablkcipher_request_alloc(tfm, GFP_NOFS); + crypto_skcipher_set_flags(tfm, CRYPTO_TFM_REQ_WEAK_KEY); + req = skcipher_request_alloc(tfm, GFP_NOFS); if (!req) { res = -ENOMEM; goto out; } - ablkcipher_request_set_callback(req, + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, derive_crypt_complete, &ecr); - res = crypto_ablkcipher_setkey(tfm, deriving_key, + res = crypto_skcipher_setkey(tfm, deriving_key, F2FS_AES_128_ECB_KEY_SIZE); if (res < 0) goto out; sg_init_one(&src_sg, source_key, F2FS_AES_256_XTS_KEY_SIZE); sg_init_one(&dst_sg, derived_key, F2FS_AES_256_XTS_KEY_SIZE); - ablkcipher_request_set_crypt(req, &src_sg, &dst_sg, + skcipher_request_set_crypt(req, &src_sg, &dst_sg, F2FS_AES_256_XTS_KEY_SIZE, NULL); - res = crypto_ablkcipher_encrypt(req); + res = crypto_skcipher_encrypt(req); if (res == -EINPROGRESS || res == -EBUSY) { BUG_ON(req->base.data != &ecr); wait_for_completion(&ecr.completion); res = ecr.res; } out: - if (req) - ablkcipher_request_free(req); - if (tfm) - crypto_free_ablkcipher(tfm); + skcipher_request_free(req); + crypto_free_skcipher(tfm); return res; } @@ -93,7 +90,7 @@ static void f2fs_free_crypt_info(struct f2fs_crypt_info *ci) return; key_put(ci->ci_keyring_key); - crypto_free_ablkcipher(ci->ci_ctfm); + crypto_free_skcipher(ci->ci_ctfm); kmem_cache_free(f2fs_crypt_info_cachep, ci); } @@ -123,7 +120,7 @@ int _f2fs_get_encryption_info(struct inode *inode) struct f2fs_encryption_key *master_key; struct f2fs_encryption_context ctx; const struct user_key_payload *ukp; - struct crypto_ablkcipher *ctfm; + struct crypto_skcipher *ctfm; const char *cipher_str; char raw_key[F2FS_MAX_KEY_SIZE]; char mode; @@ -213,7 +210,7 @@ retry: if (res) goto out; - ctfm = crypto_alloc_ablkcipher(cipher_str, 0, 0); + ctfm = crypto_alloc_skcipher(cipher_str, 0, 0); if (!ctfm || IS_ERR(ctfm)) { res = ctfm ? PTR_ERR(ctfm) : -ENOMEM; printk(KERN_DEBUG @@ -222,11 +219,10 @@ retry: goto out; } crypt_info->ci_ctfm = ctfm; - crypto_ablkcipher_clear_flags(ctfm, ~0); - crypto_tfm_set_flags(crypto_ablkcipher_tfm(ctfm), - CRYPTO_TFM_REQ_WEAK_KEY); - res = crypto_ablkcipher_setkey(ctfm, raw_key, - f2fs_encryption_key_size(mode)); + crypto_skcipher_clear_flags(ctfm, ~0); + crypto_skcipher_set_flags(ctfm, CRYPTO_TFM_REQ_WEAK_KEY); + res = crypto_skcipher_setkey(ctfm, raw_key, + f2fs_encryption_key_size(mode)); if (res) goto out; diff --git a/fs/f2fs/f2fs_crypto.h b/fs/f2fs/f2fs_crypto.h index c2c1c2b..ea3d1d7 100644 --- a/fs/f2fs/f2fs_crypto.h +++ b/fs/f2fs/f2fs_crypto.h @@ -78,7 +78,7 @@ struct f2fs_crypt_info { char ci_data_mode; char ci_filename_mode; char ci_flags; - struct crypto_ablkcipher *ci_ctfm; + struct crypto_skcipher *ci_ctfm; struct key *ci_keyring_key; char ci_master_key[F2FS_KEY_DESCRIPTOR_SIZE]; }; diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 6915c95..5c46ed9 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -223,6 +223,9 @@ static void wb_wait_for_completion(struct backing_dev_info *bdi, #define WB_FRN_HIST_MAX_SLOTS (WB_FRN_HIST_THR_SLOTS / 2 + 1) /* one round can affect upto 5 slots */ +static atomic_t isw_nr_in_flight = ATOMIC_INIT(0); +static struct workqueue_struct *isw_wq; + void __inode_attach_wb(struct inode *inode, struct page *page) { struct backing_dev_info *bdi = inode_to_bdi(inode); @@ -424,6 +427,8 @@ skip_switch: iput(inode); kfree(isw); + + atomic_dec(&isw_nr_in_flight); } static void inode_switch_wbs_rcu_fn(struct rcu_head *rcu_head) @@ -433,7 +438,7 @@ static void inode_switch_wbs_rcu_fn(struct rcu_head *rcu_head) /* needs to grab bh-unsafe locks, bounce to work item */ INIT_WORK(&isw->work, inode_switch_wbs_work_fn); - schedule_work(&isw->work); + queue_work(isw_wq, &isw->work); } /** @@ -469,7 +474,8 @@ static void inode_switch_wbs(struct inode *inode, int new_wb_id) /* while holding I_WB_SWITCH, no one else can update the association */ spin_lock(&inode->i_lock); - if (inode->i_state & (I_WB_SWITCH | I_FREEING) || + if (!(inode->i_sb->s_flags & MS_ACTIVE) || + inode->i_state & (I_WB_SWITCH | I_FREEING) || inode_to_wb(inode) == isw->new_wb) { spin_unlock(&inode->i_lock); goto out_free; @@ -480,6 +486,8 @@ static void inode_switch_wbs(struct inode *inode, int new_wb_id) ihold(inode); isw->inode = inode; + atomic_inc(&isw_nr_in_flight); + /* * In addition to synchronizing among switchers, I_WB_SWITCH tells * the RCU protected stat update paths to grab the mapping's @@ -840,6 +848,33 @@ restart: wb_put(last_wb); } +/** + * cgroup_writeback_umount - flush inode wb switches for umount + * + * This function is called when a super_block is about to be destroyed and + * flushes in-flight inode wb switches. An inode wb switch goes through + * RCU and then workqueue, so the two need to be flushed in order to ensure + * that all previously scheduled switches are finished. As wb switches are + * rare occurrences and synchronize_rcu() can take a while, perform + * flushing iff wb switches are in flight. + */ +void cgroup_writeback_umount(void) +{ + if (atomic_read(&isw_nr_in_flight)) { + synchronize_rcu(); + flush_workqueue(isw_wq); + } +} + +static int __init cgroup_writeback_init(void) +{ + isw_wq = alloc_workqueue("inode_switch_wbs", 0, 0); + if (!isw_wq) + return -ENOMEM; + return 0; +} +fs_initcall(cgroup_writeback_init); + #else /* CONFIG_CGROUP_WRITEBACK */ static struct bdi_writeback * diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c index 93f0746..aa016e4 100644 --- a/fs/gfs2/aops.c +++ b/fs/gfs2/aops.c @@ -1082,7 +1082,7 @@ static ssize_t gfs2_direct_IO(struct kiocb *iocb, struct iov_iter *iter, * the first place, mapping->nr_pages will always be zero. */ if (mapping->nrpages) { - loff_t lstart = offset & (PAGE_CACHE_SIZE - 1); + loff_t lstart = offset & ~(PAGE_CACHE_SIZE - 1); loff_t len = iov_iter_count(iter); loff_t end = PAGE_ALIGN(offset + len) - 1; diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c index 6a92592..4a01f30 100644 --- a/fs/gfs2/dir.c +++ b/fs/gfs2/dir.c @@ -798,7 +798,7 @@ static int get_first_leaf(struct gfs2_inode *dip, u32 index, int error; error = get_leaf_nr(dip, index, &leaf_no); - if (!error) + if (!IS_ERR_VALUE(error)) error = get_leaf(dip, leaf_no, bh_out); return error; @@ -1014,7 +1014,7 @@ static int dir_split_leaf(struct inode *inode, const struct qstr *name) index = name->hash >> (32 - dip->i_depth); error = get_leaf_nr(dip, index, &leaf_no); - if (error) + if (IS_ERR_VALUE(error)) return error; /* Get the old leaf block */ @@ -1660,7 +1660,7 @@ struct inode *gfs2_dir_search(struct inode *dir, const struct qstr *name, brelse(bh); if (fail_on_exist) return ERR_PTR(-EEXIST); - inode = gfs2_inode_lookup(dir->i_sb, dtype, addr, formal_ino, 0); + inode = gfs2_inode_lookup(dir->i_sb, dtype, addr, formal_ino); if (!IS_ERR(inode)) GFS2_I(inode)->i_rahead = rahead; return inode; diff --git a/fs/gfs2/export.c b/fs/gfs2/export.c index 5d15e94..d5bda85 100644 --- a/fs/gfs2/export.c +++ b/fs/gfs2/export.c @@ -137,7 +137,7 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, struct gfs2_sbd *sdp = sb->s_fs_info; struct inode *inode; - inode = gfs2_ilookup(sb, inum->no_addr, 0); + inode = gfs2_ilookup(sb, inum->no_addr); if (inode) { if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) { iput(inode); diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index a4ff7b5..6539131 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -572,17 +572,24 @@ static void delete_work_func(struct work_struct *work) struct inode *inode; u64 no_addr = gl->gl_name.ln_number; + /* If someone's using this glock to create a new dinode, the block must + have been freed by another node, then re-used, in which case our + iopen callback is too late after the fact. Ignore it. */ + if (test_bit(GLF_INODE_CREATING, &gl->gl_flags)) + goto out; + ip = gl->gl_object; /* Note: Unsafe to dereference ip as we don't hold right refs/locks */ if (ip) - inode = gfs2_ilookup(sdp->sd_vfs, no_addr, 1); + inode = gfs2_ilookup(sdp->sd_vfs, no_addr); else inode = gfs2_lookup_by_inum(sdp, no_addr, NULL, GFS2_BLKST_UNLINKED); if (inode && !IS_ERR(inode)) { d_prune_aliases(inode); iput(inode); } +out: gfs2_glock_put(gl); } @@ -1015,6 +1022,7 @@ void gfs2_glock_dq(struct gfs2_holder *gh) handle_callback(gl, LM_ST_UNLOCKED, 0, false); list_del_init(&gh->gh_list); + clear_bit(HIF_HOLDER, &gh->gh_iflags); if (find_first_holder(gl) == NULL) { if (glops->go_unlock) { GLOCK_BUG_ON(gl, test_and_set_bit(GLF_LOCK, &gl->gl_flags)); diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h index 845fb09..a6a3389 100644 --- a/fs/gfs2/incore.h +++ b/fs/gfs2/incore.h @@ -328,6 +328,7 @@ enum { GLF_LRU = 13, GLF_OBJECT = 14, /* Used only for tracing */ GLF_BLOCKING = 15, + GLF_INODE_CREATING = 16, /* Inode creation occurring */ }; struct gfs2_glock { diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index 352f958..bb30f9a 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -37,61 +37,9 @@ #include "super.h" #include "glops.h" -struct gfs2_skip_data { - u64 no_addr; - int skipped; - int non_block; -}; - -static int iget_test(struct inode *inode, void *opaque) -{ - struct gfs2_inode *ip = GFS2_I(inode); - struct gfs2_skip_data *data = opaque; - - if (ip->i_no_addr == data->no_addr) { - if (data->non_block && - inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) { - data->skipped = 1; - return 0; - } - return 1; - } - return 0; -} - -static int iget_set(struct inode *inode, void *opaque) -{ - struct gfs2_inode *ip = GFS2_I(inode); - struct gfs2_skip_data *data = opaque; - - if (data->skipped) - return -ENOENT; - inode->i_ino = (unsigned long)(data->no_addr); - ip->i_no_addr = data->no_addr; - return 0; -} - -struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block) +struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr) { - unsigned long hash = (unsigned long)no_addr; - struct gfs2_skip_data data; - - data.no_addr = no_addr; - data.skipped = 0; - data.non_block = non_block; - return ilookup5(sb, hash, iget_test, &data); -} - -static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr, - int non_block) -{ - struct gfs2_skip_data data; - unsigned long hash = (unsigned long)no_addr; - - data.no_addr = no_addr; - data.skipped = 0; - data.non_block = non_block; - return iget5_locked(sb, hash, iget_test, iget_set, &data); + return ilookup(sb, (unsigned long)no_addr); } /** @@ -132,21 +80,21 @@ static void gfs2_set_iop(struct inode *inode) * @sb: The super block * @no_addr: The inode number * @type: The type of the inode - * non_block: Can we block on inodes that are being freed? * * Returns: A VFS inode, or an error */ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, - u64 no_addr, u64 no_formal_ino, int non_block) + u64 no_addr, u64 no_formal_ino) { struct inode *inode; struct gfs2_inode *ip; struct gfs2_glock *io_gl = NULL; int error; - inode = gfs2_iget(sb, no_addr, non_block); + inode = iget_locked(sb, (unsigned long)no_addr); ip = GFS2_I(inode); + ip->i_no_addr = no_addr; if (!inode) return ERR_PTR(-ENOMEM); @@ -221,7 +169,7 @@ struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, if (error) goto fail; - inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1); + inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0); if (IS_ERR(inode)) goto fail; @@ -592,7 +540,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, struct inode *inode = NULL; struct gfs2_inode *dip = GFS2_I(dir), *ip; struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); - struct gfs2_glock *io_gl; + struct gfs2_glock *io_gl = NULL; int error, free_vfs_inode = 1; u32 aflags = 0; unsigned blocks = 1; @@ -729,6 +677,8 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, if (error) goto fail_gunlock2; + BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags)); + error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); if (error) goto fail_gunlock2; @@ -771,12 +721,15 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, } gfs2_glock_dq_uninit(ghs); gfs2_glock_dq_uninit(ghs + 1); + clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); return error; fail_gunlock3: gfs2_glock_dq_uninit(&ip->i_iopen_gh); gfs2_glock_put(io_gl); fail_gunlock2: + if (io_gl) + clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); gfs2_glock_dq_uninit(ghs + 1); fail_free_inode: if (ip->i_gl) diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h index ba4d949..e1af0d4 100644 --- a/fs/gfs2/inode.h +++ b/fs/gfs2/inode.h @@ -94,12 +94,11 @@ err: } extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, - u64 no_addr, u64 no_formal_ino, - int non_block); + u64 no_addr, u64 no_formal_ino); extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, u64 *no_formal_ino, unsigned int blktype); -extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int nonblock); +extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr); extern int gfs2_inode_refresh(struct gfs2_inode *ip); diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c index dbed9e2..49b0bff 100644 --- a/fs/gfs2/ops_fstype.c +++ b/fs/gfs2/ops_fstype.c @@ -454,7 +454,7 @@ static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr, struct dentry *dentry; struct inode *inode; - inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0); + inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0); if (IS_ERR(inode)) { fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode)); return PTR_ERR(inode); diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index 8f960a5..f8a0cd8 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -1551,12 +1551,16 @@ static void gfs2_evict_inode(struct inode *inode) goto out_truncate; } - ip->i_iopen_gh.gh_flags |= GL_NOCACHE; - gfs2_glock_dq_wait(&ip->i_iopen_gh); - gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); - error = gfs2_glock_nq(&ip->i_iopen_gh); - if (error) - goto out_truncate; + if (ip->i_iopen_gh.gh_gl && + test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { + ip->i_iopen_gh.gh_flags |= GL_NOCACHE; + gfs2_glock_dq_wait(&ip->i_iopen_gh); + gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, + &ip->i_iopen_gh); + error = gfs2_glock_nq(&ip->i_iopen_gh); + if (error) + goto out_truncate; + } /* Case 1 starts here */ @@ -1606,11 +1610,13 @@ out_unlock: if (gfs2_rs_active(&ip->i_res)) gfs2_rs_deltree(&ip->i_res); - if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { - ip->i_iopen_gh.gh_flags |= GL_NOCACHE; - gfs2_glock_dq_wait(&ip->i_iopen_gh); + if (ip->i_iopen_gh.gh_gl) { + if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { + ip->i_iopen_gh.gh_flags |= GL_NOCACHE; + gfs2_glock_dq_wait(&ip->i_iopen_gh); + } + gfs2_holder_uninit(&ip->i_iopen_gh); } - gfs2_holder_uninit(&ip->i_iopen_gh); gfs2_glock_dq_uninit(&gh); if (error && error != GLR_TRYFAILED && error != -EROFS) fs_warn(sdp, "gfs2_evict_inode: %d\n", error); @@ -154,6 +154,12 @@ int inode_init_always(struct super_block *sb, struct inode *inode) inode->i_rdev = 0; inode->dirtied_when = 0; +#ifdef CONFIG_CGROUP_WRITEBACK + inode->i_wb_frn_winner = 0; + inode->i_wb_frn_avg_time = 0; + inode->i_wb_frn_history = 0; +#endif + if (security_inode_alloc(inode)) goto out; spin_lock_init(&inode->i_lock); diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c index 36345fe..517f2de 100644 --- a/fs/jbd2/commit.c +++ b/fs/jbd2/commit.c @@ -131,14 +131,12 @@ static int journal_submit_commit_record(journal_t *journal, if (is_journal_aborted(journal)) return 0; - bh = jbd2_journal_get_descriptor_buffer(journal); + bh = jbd2_journal_get_descriptor_buffer(commit_transaction, + JBD2_COMMIT_BLOCK); if (!bh) return 1; tmp = (struct commit_header *)bh->b_data; - tmp->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); - tmp->h_blocktype = cpu_to_be32(JBD2_COMMIT_BLOCK); - tmp->h_sequence = cpu_to_be32(commit_transaction->t_tid); tmp->h_commit_sec = cpu_to_be64(now.tv_sec); tmp->h_commit_nsec = cpu_to_be32(now.tv_nsec); @@ -222,7 +220,7 @@ static int journal_submit_data_buffers(journal_t *journal, spin_lock(&journal->j_list_lock); list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) { mapping = jinode->i_vfs_inode->i_mapping; - set_bit(__JI_COMMIT_RUNNING, &jinode->i_flags); + jinode->i_flags |= JI_COMMIT_RUNNING; spin_unlock(&journal->j_list_lock); /* * submit the inode data buffers. We use writepage @@ -236,8 +234,8 @@ static int journal_submit_data_buffers(journal_t *journal, ret = err; spin_lock(&journal->j_list_lock); J_ASSERT(jinode->i_transaction == commit_transaction); - clear_bit(__JI_COMMIT_RUNNING, &jinode->i_flags); - smp_mb__after_atomic(); + jinode->i_flags &= ~JI_COMMIT_RUNNING; + smp_mb(); wake_up_bit(&jinode->i_flags, __JI_COMMIT_RUNNING); } spin_unlock(&journal->j_list_lock); @@ -258,7 +256,7 @@ static int journal_finish_inode_data_buffers(journal_t *journal, /* For locking, see the comment in journal_submit_data_buffers() */ spin_lock(&journal->j_list_lock); list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) { - set_bit(__JI_COMMIT_RUNNING, &jinode->i_flags); + jinode->i_flags |= JI_COMMIT_RUNNING; spin_unlock(&journal->j_list_lock); err = filemap_fdatawait(jinode->i_vfs_inode->i_mapping); if (err) { @@ -274,8 +272,8 @@ static int journal_finish_inode_data_buffers(journal_t *journal, ret = err; } spin_lock(&journal->j_list_lock); - clear_bit(__JI_COMMIT_RUNNING, &jinode->i_flags); - smp_mb__after_atomic(); + jinode->i_flags &= ~JI_COMMIT_RUNNING; + smp_mb(); wake_up_bit(&jinode->i_flags, __JI_COMMIT_RUNNING); } @@ -319,22 +317,6 @@ static void write_tag_block(journal_t *j, journal_block_tag_t *tag, tag->t_blocknr_high = cpu_to_be32((block >> 31) >> 1); } -static void jbd2_descr_block_csum_set(journal_t *j, - struct buffer_head *bh) -{ - struct jbd2_journal_block_tail *tail; - __u32 csum; - - if (!jbd2_journal_has_csum_v2or3(j)) - return; - - tail = (struct jbd2_journal_block_tail *)(bh->b_data + j->j_blocksize - - sizeof(struct jbd2_journal_block_tail)); - tail->t_checksum = 0; - csum = jbd2_chksum(j, j->j_csum_seed, bh->b_data, j->j_blocksize); - tail->t_checksum = cpu_to_be32(csum); -} - static void jbd2_block_tag_csum_set(journal_t *j, journal_block_tag_t *tag, struct buffer_head *bh, __u32 sequence) { @@ -379,7 +361,6 @@ void jbd2_journal_commit_transaction(journal_t *journal) ktime_t start_time; u64 commit_time; char *tagp = NULL; - journal_header_t *header; journal_block_tag_t *tag = NULL; int space_left = 0; int first_tag = 0; @@ -554,8 +535,7 @@ void jbd2_journal_commit_transaction(journal_t *journal) jbd2_journal_abort(journal, err); blk_start_plug(&plug); - jbd2_journal_write_revoke_records(journal, commit_transaction, - &log_bufs, WRITE_SYNC); + jbd2_journal_write_revoke_records(commit_transaction, &log_bufs); jbd_debug(3, "JBD2: commit phase 2b\n"); @@ -616,7 +596,9 @@ void jbd2_journal_commit_transaction(journal_t *journal) jbd_debug(4, "JBD2: get descriptor\n"); - descriptor = jbd2_journal_get_descriptor_buffer(journal); + descriptor = jbd2_journal_get_descriptor_buffer( + commit_transaction, + JBD2_DESCRIPTOR_BLOCK); if (!descriptor) { jbd2_journal_abort(journal, -EIO); continue; @@ -625,11 +607,6 @@ void jbd2_journal_commit_transaction(journal_t *journal) jbd_debug(4, "JBD2: got buffer %llu (%p)\n", (unsigned long long)descriptor->b_blocknr, descriptor->b_data); - header = (journal_header_t *)descriptor->b_data; - header->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); - header->h_blocktype = cpu_to_be32(JBD2_DESCRIPTOR_BLOCK); - header->h_sequence = cpu_to_be32(commit_transaction->t_tid); - tagp = &descriptor->b_data[sizeof(journal_header_t)]; space_left = descriptor->b_size - sizeof(journal_header_t); @@ -721,7 +698,7 @@ void jbd2_journal_commit_transaction(journal_t *journal) tag->t_flags |= cpu_to_be16(JBD2_FLAG_LAST_TAG); - jbd2_descr_block_csum_set(journal, descriptor); + jbd2_descriptor_block_csum_set(journal, descriptor); start_journal_io: for (i = 0; i < bufs; i++) { struct buffer_head *bh = wbuf[i]; diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 81e6226..de73a95 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -805,10 +805,13 @@ int jbd2_journal_bmap(journal_t *journal, unsigned long blocknr, * But we don't bother doing that, so there will be coherency problems with * mmaps of blockdevs which hold live JBD-controlled filesystems. */ -struct buffer_head *jbd2_journal_get_descriptor_buffer(journal_t *journal) +struct buffer_head * +jbd2_journal_get_descriptor_buffer(transaction_t *transaction, int type) { + journal_t *journal = transaction->t_journal; struct buffer_head *bh; unsigned long long blocknr; + journal_header_t *header; int err; err = jbd2_journal_next_log_block(journal, &blocknr); @@ -821,12 +824,31 @@ struct buffer_head *jbd2_journal_get_descriptor_buffer(journal_t *journal) return NULL; lock_buffer(bh); memset(bh->b_data, 0, journal->j_blocksize); + header = (journal_header_t *)bh->b_data; + header->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); + header->h_blocktype = cpu_to_be32(type); + header->h_sequence = cpu_to_be32(transaction->t_tid); set_buffer_uptodate(bh); unlock_buffer(bh); BUFFER_TRACE(bh, "return this buffer"); return bh; } +void jbd2_descriptor_block_csum_set(journal_t *j, struct buffer_head *bh) +{ + struct jbd2_journal_block_tail *tail; + __u32 csum; + + if (!jbd2_journal_has_csum_v2or3(j)) + return; + + tail = (struct jbd2_journal_block_tail *)(bh->b_data + j->j_blocksize - + sizeof(struct jbd2_journal_block_tail)); + tail->t_checksum = 0; + csum = jbd2_chksum(j, j->j_csum_seed, bh->b_data, j->j_blocksize); + tail->t_checksum = cpu_to_be32(csum); +} + /* * Return tid of the oldest transaction in the journal and block in the journal * where the transaction starts. @@ -1408,11 +1430,12 @@ out: /** * jbd2_mark_journal_empty() - Mark on disk journal as empty. * @journal: The journal to update. + * @write_op: With which operation should we write the journal sb * * Update a journal's dynamic superblock fields to show that journal is empty. * Write updated superblock to disk waiting for IO to complete. */ -static void jbd2_mark_journal_empty(journal_t *journal) +static void jbd2_mark_journal_empty(journal_t *journal, int write_op) { journal_superblock_t *sb = journal->j_superblock; @@ -1430,7 +1453,7 @@ static void jbd2_mark_journal_empty(journal_t *journal) sb->s_start = cpu_to_be32(0); read_unlock(&journal->j_state_lock); - jbd2_write_superblock(journal, WRITE_FUA); + jbd2_write_superblock(journal, write_op); /* Log is no longer empty */ write_lock(&journal->j_state_lock); @@ -1716,7 +1739,13 @@ int jbd2_journal_destroy(journal_t *journal) if (journal->j_sb_buffer) { if (!is_journal_aborted(journal)) { mutex_lock(&journal->j_checkpoint_mutex); - jbd2_mark_journal_empty(journal); + + write_lock(&journal->j_state_lock); + journal->j_tail_sequence = + ++journal->j_transaction_sequence; + write_unlock(&journal->j_state_lock); + + jbd2_mark_journal_empty(journal, WRITE_FLUSH_FUA); mutex_unlock(&journal->j_checkpoint_mutex); } else err = -EIO; @@ -1975,7 +2004,7 @@ int jbd2_journal_flush(journal_t *journal) * the magic code for a fully-recovered superblock. Any future * commits of data to the journal will restore the current * s_start value. */ - jbd2_mark_journal_empty(journal); + jbd2_mark_journal_empty(journal, WRITE_FUA); mutex_unlock(&journal->j_checkpoint_mutex); write_lock(&journal->j_state_lock); J_ASSERT(!journal->j_running_transaction); @@ -2021,7 +2050,7 @@ int jbd2_journal_wipe(journal_t *journal, int write) if (write) { /* Lock to make assertions happy... */ mutex_lock(&journal->j_checkpoint_mutex); - jbd2_mark_journal_empty(journal); + jbd2_mark_journal_empty(journal, WRITE_FUA); mutex_unlock(&journal->j_checkpoint_mutex); } @@ -2565,7 +2594,7 @@ void jbd2_journal_release_jbd_inode(journal_t *journal, restart: spin_lock(&journal->j_list_lock); /* Is commit writing out inode - we have to wait */ - if (test_bit(__JI_COMMIT_RUNNING, &jinode->i_flags)) { + if (jinode->i_flags & JI_COMMIT_RUNNING) { wait_queue_head_t *wq; DEFINE_WAIT_BIT(wait, &jinode->i_flags, __JI_COMMIT_RUNNING); wq = bit_waitqueue(&jinode->i_flags, __JI_COMMIT_RUNNING); diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c index 7f277e4..08a456b 100644 --- a/fs/jbd2/recovery.c +++ b/fs/jbd2/recovery.c @@ -174,8 +174,7 @@ static int jread(struct buffer_head **bhp, journal_t *journal, return 0; } -static int jbd2_descr_block_csum_verify(journal_t *j, - void *buf) +static int jbd2_descriptor_block_csum_verify(journal_t *j, void *buf) { struct jbd2_journal_block_tail *tail; __be32 provided; @@ -522,8 +521,8 @@ static int do_one_pass(journal_t *journal, descr_csum_size = sizeof(struct jbd2_journal_block_tail); if (descr_csum_size > 0 && - !jbd2_descr_block_csum_verify(journal, - bh->b_data)) { + !jbd2_descriptor_block_csum_verify(journal, + bh->b_data)) { printk(KERN_ERR "JBD2: Invalid checksum " "recovering block %lu in log\n", next_log_block); @@ -811,26 +810,6 @@ static int do_one_pass(journal_t *journal, return err; } -static int jbd2_revoke_block_csum_verify(journal_t *j, - void *buf) -{ - struct jbd2_journal_revoke_tail *tail; - __be32 provided; - __u32 calculated; - - if (!jbd2_journal_has_csum_v2or3(j)) - return 1; - - tail = (struct jbd2_journal_revoke_tail *)(buf + j->j_blocksize - - sizeof(struct jbd2_journal_revoke_tail)); - provided = tail->r_checksum; - tail->r_checksum = 0; - calculated = jbd2_chksum(j, j->j_csum_seed, buf, j->j_blocksize); - tail->r_checksum = provided; - - return provided == cpu_to_be32(calculated); -} - /* Scan a revoke record, marking all blocks mentioned as revoked. */ static int scan_revoke_records(journal_t *journal, struct buffer_head *bh, @@ -846,11 +825,11 @@ static int scan_revoke_records(journal_t *journal, struct buffer_head *bh, offset = sizeof(jbd2_journal_revoke_header_t); rcount = be32_to_cpu(header->r_count); - if (!jbd2_revoke_block_csum_verify(journal, header)) + if (!jbd2_descriptor_block_csum_verify(journal, header)) return -EFSBADCRC; if (jbd2_journal_has_csum_v2or3(journal)) - csum_size = sizeof(struct jbd2_journal_revoke_tail); + csum_size = sizeof(struct jbd2_journal_block_tail); if (rcount > journal->j_blocksize - csum_size) return -EINVAL; max = rcount; diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c index 705ae57..91171dc 100644 --- a/fs/jbd2/revoke.c +++ b/fs/jbd2/revoke.c @@ -122,11 +122,11 @@ struct jbd2_revoke_table_s #ifdef __KERNEL__ -static void write_one_revoke_record(journal_t *, transaction_t *, +static void write_one_revoke_record(transaction_t *, struct list_head *, struct buffer_head **, int *, - struct jbd2_revoke_record_s *, int); -static void flush_descriptor(journal_t *, struct buffer_head *, int, int); + struct jbd2_revoke_record_s *); +static void flush_descriptor(journal_t *, struct buffer_head *, int); #endif /* Utility functions to maintain the revoke table */ @@ -519,11 +519,10 @@ void jbd2_journal_switch_revoke_table(journal_t *journal) * Write revoke records to the journal for all entries in the current * revoke hash, deleting the entries as we go. */ -void jbd2_journal_write_revoke_records(journal_t *journal, - transaction_t *transaction, - struct list_head *log_bufs, - int write_op) +void jbd2_journal_write_revoke_records(transaction_t *transaction, + struct list_head *log_bufs) { + journal_t *journal = transaction->t_journal; struct buffer_head *descriptor; struct jbd2_revoke_record_s *record; struct jbd2_revoke_table_s *revoke; @@ -544,16 +543,15 @@ void jbd2_journal_write_revoke_records(journal_t *journal, while (!list_empty(hash_list)) { record = (struct jbd2_revoke_record_s *) hash_list->next; - write_one_revoke_record(journal, transaction, log_bufs, - &descriptor, &offset, - record, write_op); + write_one_revoke_record(transaction, log_bufs, + &descriptor, &offset, record); count++; list_del(&record->hash); kmem_cache_free(jbd2_revoke_record_cache, record); } } if (descriptor) - flush_descriptor(journal, descriptor, offset, write_op); + flush_descriptor(journal, descriptor, offset); jbd_debug(1, "Wrote %d revoke records\n", count); } @@ -562,18 +560,16 @@ void jbd2_journal_write_revoke_records(journal_t *journal, * block if the old one is full or if we have not already created one. */ -static void write_one_revoke_record(journal_t *journal, - transaction_t *transaction, +static void write_one_revoke_record(transaction_t *transaction, struct list_head *log_bufs, struct buffer_head **descriptorp, int *offsetp, - struct jbd2_revoke_record_s *record, - int write_op) + struct jbd2_revoke_record_s *record) { + journal_t *journal = transaction->t_journal; int csum_size = 0; struct buffer_head *descriptor; int sz, offset; - journal_header_t *header; /* If we are already aborting, this all becomes a noop. We still need to go round the loop in @@ -587,7 +583,7 @@ static void write_one_revoke_record(journal_t *journal, /* Do we need to leave space at the end for a checksum? */ if (jbd2_journal_has_csum_v2or3(journal)) - csum_size = sizeof(struct jbd2_journal_revoke_tail); + csum_size = sizeof(struct jbd2_journal_block_tail); if (jbd2_has_feature_64bit(journal)) sz = 8; @@ -597,19 +593,16 @@ static void write_one_revoke_record(journal_t *journal, /* Make sure we have a descriptor with space left for the record */ if (descriptor) { if (offset + sz > journal->j_blocksize - csum_size) { - flush_descriptor(journal, descriptor, offset, write_op); + flush_descriptor(journal, descriptor, offset); descriptor = NULL; } } if (!descriptor) { - descriptor = jbd2_journal_get_descriptor_buffer(journal); + descriptor = jbd2_journal_get_descriptor_buffer(transaction, + JBD2_REVOKE_BLOCK); if (!descriptor) return; - header = (journal_header_t *)descriptor->b_data; - header->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); - header->h_blocktype = cpu_to_be32(JBD2_REVOKE_BLOCK); - header->h_sequence = cpu_to_be32(transaction->t_tid); /* Record it so that we can wait for IO completion later */ BUFFER_TRACE(descriptor, "file in log_bufs"); @@ -630,21 +623,6 @@ static void write_one_revoke_record(journal_t *journal, *offsetp = offset; } -static void jbd2_revoke_csum_set(journal_t *j, struct buffer_head *bh) -{ - struct jbd2_journal_revoke_tail *tail; - __u32 csum; - - if (!jbd2_journal_has_csum_v2or3(j)) - return; - - tail = (struct jbd2_journal_revoke_tail *)(bh->b_data + j->j_blocksize - - sizeof(struct jbd2_journal_revoke_tail)); - tail->r_checksum = 0; - csum = jbd2_chksum(j, j->j_csum_seed, bh->b_data, j->j_blocksize); - tail->r_checksum = cpu_to_be32(csum); -} - /* * Flush a revoke descriptor out to the journal. If we are aborting, * this is a noop; otherwise we are generating a buffer which needs to @@ -654,7 +632,7 @@ static void jbd2_revoke_csum_set(journal_t *j, struct buffer_head *bh) static void flush_descriptor(journal_t *journal, struct buffer_head *descriptor, - int offset, int write_op) + int offset) { jbd2_journal_revoke_header_t *header; @@ -665,12 +643,12 @@ static void flush_descriptor(journal_t *journal, header = (jbd2_journal_revoke_header_t *)descriptor->b_data; header->r_count = cpu_to_be32(offset); - jbd2_revoke_csum_set(journal, descriptor); + jbd2_descriptor_block_csum_set(journal, descriptor); set_buffer_jwrite(descriptor); BUFFER_TRACE(descriptor, "write"); set_buffer_dirty(descriptor); - write_dirty_buffer(descriptor, write_op); + write_dirty_buffer(descriptor, WRITE_SYNC); } #endif diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 081dff0..01e4652d 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -966,14 +966,8 @@ repeat: if (!frozen_buffer) { JBUFFER_TRACE(jh, "allocate memory for buffer"); jbd_unlock_bh_state(bh); - frozen_buffer = jbd2_alloc(jh2bh(jh)->b_size, GFP_NOFS); - if (!frozen_buffer) { - printk(KERN_ERR "%s: OOM for frozen_buffer\n", - __func__); - JBUFFER_TRACE(jh, "oom!"); - error = -ENOMEM; - goto out; - } + frozen_buffer = jbd2_alloc(jh2bh(jh)->b_size, + GFP_NOFS | __GFP_NOFAIL); goto repeat; } jh->b_frozen_data = frozen_buffer; @@ -1226,15 +1220,9 @@ int jbd2_journal_get_undo_access(handle_t *handle, struct buffer_head *bh) goto out; repeat: - if (!jh->b_committed_data) { - committed_data = jbd2_alloc(jh2bh(jh)->b_size, GFP_NOFS); - if (!committed_data) { - printk(KERN_ERR "%s: No memory for committed data\n", - __func__); - err = -ENOMEM; - goto out; - } - } + if (!jh->b_committed_data) + committed_data = jbd2_alloc(jh2bh(jh)->b_size, + GFP_NOFS|__GFP_NOFAIL); jbd_lock_bh_state(bh); if (!jh->b_committed_data) { diff --git a/fs/jffs2/README.Locking b/fs/jffs2/README.Locking index 3ea3655..8918ac9 100644 --- a/fs/jffs2/README.Locking +++ b/fs/jffs2/README.Locking @@ -2,10 +2,6 @@ JFFS2 LOCKING DOCUMENTATION --------------------------- -At least theoretically, JFFS2 does not require the Big Kernel Lock -(BKL), which was always helpfully obtained for it by Linux 2.4 VFS -code. It has its own locking, as described below. - This document attempts to describe the existing locking rules for JFFS2. It is not expected to remain perfectly up to date, but ought to be fairly close. @@ -69,6 +65,7 @@ Ordering constraints: any f->sem held. 2. Never attempt to lock two file mutexes in one thread. No ordering rules have been made for doing so. + 3. Never lock a page cache page with f->sem held. erase_completion_lock spinlock diff --git a/fs/jffs2/build.c b/fs/jffs2/build.c index 0ae91ad..b288c8a 100644 --- a/fs/jffs2/build.c +++ b/fs/jffs2/build.c @@ -50,7 +50,8 @@ next_inode(int *i, struct jffs2_inode_cache *ic, struct jffs2_sb_info *c) static void jffs2_build_inode_pass1(struct jffs2_sb_info *c, - struct jffs2_inode_cache *ic) + struct jffs2_inode_cache *ic, + int *dir_hardlinks) { struct jffs2_full_dirent *fd; @@ -69,19 +70,21 @@ static void jffs2_build_inode_pass1(struct jffs2_sb_info *c, dbg_fsbuild("child \"%s\" (ino #%u) of dir ino #%u doesn't exist!\n", fd->name, fd->ino, ic->ino); jffs2_mark_node_obsolete(c, fd->raw); + /* Clear the ic/raw union so it doesn't cause problems later. */ + fd->ic = NULL; continue; } + /* From this point, fd->raw is no longer used so we can set fd->ic */ + fd->ic = child_ic; + child_ic->pino_nlink++; + /* If we appear (at this stage) to have hard-linked directories, + * set a flag to trigger a scan later */ if (fd->type == DT_DIR) { - if (child_ic->pino_nlink) { - JFFS2_ERROR("child dir \"%s\" (ino #%u) of dir ino #%u appears to be a hard link\n", - fd->name, fd->ino, ic->ino); - /* TODO: What do we do about it? */ - } else { - child_ic->pino_nlink = ic->ino; - } - } else - child_ic->pino_nlink++; + child_ic->flags |= INO_FLAGS_IS_DIR; + if (child_ic->pino_nlink > 1) + *dir_hardlinks = 1; + } dbg_fsbuild("increased nlink for child \"%s\" (ino #%u)\n", fd->name, fd->ino); /* Can't free scan_dents so far. We might need them in pass 2 */ @@ -95,8 +98,7 @@ static void jffs2_build_inode_pass1(struct jffs2_sb_info *c, */ static int jffs2_build_filesystem(struct jffs2_sb_info *c) { - int ret; - int i; + int ret, i, dir_hardlinks = 0; struct jffs2_inode_cache *ic; struct jffs2_full_dirent *fd; struct jffs2_full_dirent *dead_fds = NULL; @@ -120,7 +122,7 @@ static int jffs2_build_filesystem(struct jffs2_sb_info *c) /* Now scan the directory tree, increasing nlink according to every dirent found. */ for_each_inode(i, c, ic) { if (ic->scan_dents) { - jffs2_build_inode_pass1(c, ic); + jffs2_build_inode_pass1(c, ic, &dir_hardlinks); cond_resched(); } } @@ -156,6 +158,20 @@ static int jffs2_build_filesystem(struct jffs2_sb_info *c) } dbg_fsbuild("pass 2a complete\n"); + + if (dir_hardlinks) { + /* If we detected directory hardlinks earlier, *hopefully* + * they are gone now because some of the links were from + * dead directories which still had some old dirents lying + * around and not yet garbage-collected, but which have + * been discarded above. So clear the pino_nlink field + * in each directory, so that the final scan below can + * print appropriate warnings. */ + for_each_inode(i, c, ic) { + if (ic->flags & INO_FLAGS_IS_DIR) + ic->pino_nlink = 0; + } + } dbg_fsbuild("freeing temporary data structures\n"); /* Finally, we can scan again and free the dirent structs */ @@ -163,6 +179,33 @@ static int jffs2_build_filesystem(struct jffs2_sb_info *c) while(ic->scan_dents) { fd = ic->scan_dents; ic->scan_dents = fd->next; + /* We do use the pino_nlink field to count nlink of + * directories during fs build, so set it to the + * parent ino# now. Now that there's hopefully only + * one. */ + if (fd->type == DT_DIR) { + if (!fd->ic) { + /* We'll have complained about it and marked the coresponding + raw node obsolete already. Just skip it. */ + continue; + } + + /* We *have* to have set this in jffs2_build_inode_pass1() */ + BUG_ON(!(fd->ic->flags & INO_FLAGS_IS_DIR)); + + /* We clear ic->pino_nlink ∀ directories' ic *only* if dir_hardlinks + * is set. Otherwise, we know this should never trigger anyway, so + * we don't do the check. And ic->pino_nlink still contains the nlink + * value (which is 1). */ + if (dir_hardlinks && fd->ic->pino_nlink) { + JFFS2_ERROR("child dir \"%s\" (ino #%u) of dir ino #%u is also hard linked from dir ino #%u\n", + fd->name, fd->ino, ic->ino, fd->ic->pino_nlink); + /* Should we unlink it from its previous parent? */ + } + + /* For directories, ic->pino_nlink holds that parent inode # */ + fd->ic->pino_nlink = ic->ino; + } jffs2_free_full_dirent(fd); } ic->scan_dents = NULL; @@ -241,11 +284,7 @@ static void jffs2_build_remove_unlinked_inode(struct jffs2_sb_info *c, /* Reduce nlink of the child. If it's now zero, stick it on the dead_fds list to be cleaned up later. Else just free the fd */ - - if (fd->type == DT_DIR) - child_ic->pino_nlink = 0; - else - child_ic->pino_nlink--; + child_ic->pino_nlink--; if (!child_ic->pino_nlink) { dbg_fsbuild("inode #%u (\"%s\") now has no links; adding to dead_fds list.\n", diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c index c5ac594..cad86ba 100644 --- a/fs/jffs2/file.c +++ b/fs/jffs2/file.c @@ -137,39 +137,33 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping, struct page *pg; struct inode *inode = mapping->host; struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); - struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); - struct jffs2_raw_inode ri; - uint32_t alloc_len = 0; pgoff_t index = pos >> PAGE_CACHE_SHIFT; uint32_t pageofs = index << PAGE_CACHE_SHIFT; int ret = 0; - jffs2_dbg(1, "%s()\n", __func__); - - if (pageofs > inode->i_size) { - ret = jffs2_reserve_space(c, sizeof(ri), &alloc_len, - ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); - if (ret) - return ret; - } - - mutex_lock(&f->sem); pg = grab_cache_page_write_begin(mapping, index, flags); - if (!pg) { - if (alloc_len) - jffs2_complete_reservation(c); - mutex_unlock(&f->sem); + if (!pg) return -ENOMEM; - } *pagep = pg; - if (alloc_len) { + jffs2_dbg(1, "%s()\n", __func__); + + if (pageofs > inode->i_size) { /* Make new hole frag from old EOF to new page */ + struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); + struct jffs2_raw_inode ri; struct jffs2_full_dnode *fn; + uint32_t alloc_len; jffs2_dbg(1, "Writing new hole frag 0x%x-0x%x between current EOF and new page\n", (unsigned int)inode->i_size, pageofs); + ret = jffs2_reserve_space(c, sizeof(ri), &alloc_len, + ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); + if (ret) + goto out_page; + + mutex_lock(&f->sem); memset(&ri, 0, sizeof(ri)); ri.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); @@ -196,6 +190,7 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping, if (IS_ERR(fn)) { ret = PTR_ERR(fn); jffs2_complete_reservation(c); + mutex_unlock(&f->sem); goto out_page; } ret = jffs2_add_full_dnode_to_inode(c, f, fn); @@ -210,10 +205,12 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping, jffs2_mark_node_obsolete(c, fn->raw); jffs2_free_full_dnode(fn); jffs2_complete_reservation(c); + mutex_unlock(&f->sem); goto out_page; } jffs2_complete_reservation(c); inode->i_size = pageofs; + mutex_unlock(&f->sem); } /* @@ -222,18 +219,18 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping, * case of a short-copy. */ if (!PageUptodate(pg)) { + mutex_lock(&f->sem); ret = jffs2_do_readpage_nolock(inode, pg); + mutex_unlock(&f->sem); if (ret) goto out_page; } - mutex_unlock(&f->sem); jffs2_dbg(1, "end write_begin(). pg->flags %lx\n", pg->flags); return ret; out_page: unlock_page(pg); page_cache_release(pg); - mutex_unlock(&f->sem); return ret; } diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c index 5a2dec2..95d5880 100644 --- a/fs/jffs2/gc.c +++ b/fs/jffs2/gc.c @@ -1296,14 +1296,17 @@ static int jffs2_garbage_collect_dnode(struct jffs2_sb_info *c, struct jffs2_era BUG_ON(start > orig_start); } - /* First, use readpage() to read the appropriate page into the page cache */ - /* Q: What happens if we actually try to GC the _same_ page for which commit_write() - * triggered garbage collection in the first place? - * A: I _think_ it's OK. read_cache_page shouldn't deadlock, we'll write out the - * page OK. We'll actually write it out again in commit_write, which is a little - * suboptimal, but at least we're correct. - */ + /* The rules state that we must obtain the page lock *before* f->sem, so + * drop f->sem temporarily. Since we also hold c->alloc_sem, nothing's + * actually going to *change* so we're safe; we only allow reading. + * + * It is important to note that jffs2_write_begin() will ensure that its + * page is marked Uptodate before allocating space. That means that if we + * end up here trying to GC the *same* page that jffs2_write_begin() is + * trying to write out, read_cache_page() will not deadlock. */ + mutex_unlock(&f->sem); pg_ptr = jffs2_gc_fetch_page(c, f, start, &pg); + mutex_lock(&f->sem); if (IS_ERR(pg_ptr)) { pr_warn("read_cache_page() returned error: %ld\n", diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h index fa35ff7..0637271 100644 --- a/fs/jffs2/nodelist.h +++ b/fs/jffs2/nodelist.h @@ -194,6 +194,7 @@ struct jffs2_inode_cache { #define INO_STATE_CLEARING 6 /* In clear_inode() */ #define INO_FLAGS_XATTR_CHECKED 0x01 /* has no duplicate xattr_ref */ +#define INO_FLAGS_IS_DIR 0x02 /* is a directory */ #define RAWNODE_CLASS_INODE_CACHE 0 #define RAWNODE_CLASS_XATTR_DATUM 1 @@ -249,7 +250,10 @@ struct jffs2_readinode_info struct jffs2_full_dirent { - struct jffs2_raw_node_ref *raw; + union { + struct jffs2_raw_node_ref *raw; + struct jffs2_inode_cache *ic; /* Just during part of build */ + }; struct jffs2_full_dirent *next; uint32_t version; uint32_t ino; /* == zero for unlink */ diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c index 996b774..118d033 100644 --- a/fs/kernfs/dir.c +++ b/fs/kernfs/dir.c @@ -691,15 +691,22 @@ static struct kernfs_node *kernfs_walk_ns(struct kernfs_node *parent, const unsigned char *path, const void *ns) { - static char path_buf[PATH_MAX]; /* protected by kernfs_mutex */ - size_t len = strlcpy(path_buf, path, PATH_MAX); - char *p = path_buf; - char *name; + size_t len; + char *p, *name; lockdep_assert_held(&kernfs_mutex); - if (len >= PATH_MAX) + /* grab kernfs_rename_lock to piggy back on kernfs_pr_cont_buf */ + spin_lock_irq(&kernfs_rename_lock); + + len = strlcpy(kernfs_pr_cont_buf, path, sizeof(kernfs_pr_cont_buf)); + + if (len >= sizeof(kernfs_pr_cont_buf)) { + spin_unlock_irq(&kernfs_rename_lock); return NULL; + } + + p = kernfs_pr_cont_buf; while ((name = strsep(&p, "/")) && parent) { if (*name == '\0') @@ -707,6 +714,8 @@ static struct kernfs_node *kernfs_walk_ns(struct kernfs_node *parent, parent = kernfs_find_ns(parent, name, ns); } + spin_unlock_irq(&kernfs_rename_lock); + return parent; } diff --git a/fs/mbcache.c b/fs/mbcache.c index 187477d..eccda3a 100644 --- a/fs/mbcache.c +++ b/fs/mbcache.c @@ -1,858 +1,433 @@ -/* - * linux/fs/mbcache.c - * (C) 2001-2002 Andreas Gruenbacher, <a.gruenbacher@computer.org> - */ - -/* - * Filesystem Meta Information Block Cache (mbcache) - * - * The mbcache caches blocks of block devices that need to be located - * by their device/block number, as well as by other criteria (such - * as the block's contents). - * - * There can only be one cache entry in a cache per device and block number. - * Additional indexes need not be unique in this sense. The number of - * additional indexes (=other criteria) can be hardwired at compile time - * or specified at cache create time. - * - * Each cache entry is of fixed size. An entry may be `valid' or `invalid' - * in the cache. A valid entry is in the main hash tables of the cache, - * and may also be in the lru list. An invalid entry is not in any hashes - * or lists. - * - * A valid cache entry is only in the lru list if no handles refer to it. - * Invalid cache entries will be freed when the last handle to the cache - * entry is released. Entries that cannot be freed immediately are put - * back on the lru list. - */ - -/* - * Lock descriptions and usage: - * - * Each hash chain of both the block and index hash tables now contains - * a built-in lock used to serialize accesses to the hash chain. - * - * Accesses to global data structures mb_cache_list and mb_cache_lru_list - * are serialized via the global spinlock mb_cache_spinlock. - * - * Each mb_cache_entry contains a spinlock, e_entry_lock, to serialize - * accesses to its local data, such as e_used and e_queued. - * - * Lock ordering: - * - * Each block hash chain's lock has the highest lock order, followed by an - * index hash chain's lock, mb_cache_bg_lock (used to implement mb_cache_entry's - * lock), and mb_cach_spinlock, with the lowest order. While holding - * either a block or index hash chain lock, a thread can acquire an - * mc_cache_bg_lock, which in turn can also acquire mb_cache_spinlock. - * - * Synchronization: - * - * Since both mb_cache_entry_get and mb_cache_entry_find scan the block and - * index hash chian, it needs to lock the corresponding hash chain. For each - * mb_cache_entry within the chain, it needs to lock the mb_cache_entry to - * prevent either any simultaneous release or free on the entry and also - * to serialize accesses to either the e_used or e_queued member of the entry. - * - * To avoid having a dangling reference to an already freed - * mb_cache_entry, an mb_cache_entry is only freed when it is not on a - * block hash chain and also no longer being referenced, both e_used, - * and e_queued are 0's. When an mb_cache_entry is explicitly freed it is - * first removed from a block hash chain. - */ - -#include <linux/kernel.h> -#include <linux/module.h> - -#include <linux/hash.h> -#include <linux/fs.h> -#include <linux/mm.h> +#include <linux/spinlock.h> #include <linux/slab.h> -#include <linux/sched.h> +#include <linux/list.h> #include <linux/list_bl.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/workqueue.h> #include <linux/mbcache.h> -#include <linux/init.h> -#include <linux/blockgroup_lock.h> -#include <linux/log2.h> - -#ifdef MB_CACHE_DEBUG -# define mb_debug(f...) do { \ - printk(KERN_DEBUG f); \ - printk("\n"); \ - } while (0) -#define mb_assert(c) do { if (!(c)) \ - printk(KERN_ERR "assertion " #c " failed\n"); \ - } while(0) -#else -# define mb_debug(f...) do { } while(0) -# define mb_assert(c) do { } while(0) -#endif -#define mb_error(f...) do { \ - printk(KERN_ERR f); \ - printk("\n"); \ - } while(0) - -#define MB_CACHE_WRITER ((unsigned short)~0U >> 1) - -#define MB_CACHE_ENTRY_LOCK_BITS ilog2(NR_BG_LOCKS) -#define MB_CACHE_ENTRY_LOCK_INDEX(ce) \ - (hash_long((unsigned long)ce, MB_CACHE_ENTRY_LOCK_BITS)) - -static DECLARE_WAIT_QUEUE_HEAD(mb_cache_queue); -static struct blockgroup_lock *mb_cache_bg_lock; -static struct kmem_cache *mb_cache_kmem_cache; - -MODULE_AUTHOR("Andreas Gruenbacher <a.gruenbacher@computer.org>"); -MODULE_DESCRIPTION("Meta block cache (for extended attributes)"); -MODULE_LICENSE("GPL"); - -EXPORT_SYMBOL(mb_cache_create); -EXPORT_SYMBOL(mb_cache_shrink); -EXPORT_SYMBOL(mb_cache_destroy); -EXPORT_SYMBOL(mb_cache_entry_alloc); -EXPORT_SYMBOL(mb_cache_entry_insert); -EXPORT_SYMBOL(mb_cache_entry_release); -EXPORT_SYMBOL(mb_cache_entry_free); -EXPORT_SYMBOL(mb_cache_entry_get); -#if !defined(MB_CACHE_INDEXES_COUNT) || (MB_CACHE_INDEXES_COUNT > 0) -EXPORT_SYMBOL(mb_cache_entry_find_first); -EXPORT_SYMBOL(mb_cache_entry_find_next); -#endif /* - * Global data: list of all mbcache's, lru list, and a spinlock for - * accessing cache data structures on SMP machines. The lru list is - * global across all mbcaches. + * Mbcache is a simple key-value store. Keys need not be unique, however + * key-value pairs are expected to be unique (we use this fact in + * mb_cache_entry_delete_block()). + * + * Ext2 and ext4 use this cache for deduplication of extended attribute blocks. + * They use hash of a block contents as a key and block number as a value. + * That's why keys need not be unique (different xattr blocks may end up having + * the same hash). However block number always uniquely identifies a cache + * entry. + * + * We provide functions for creation and removal of entries, search by key, + * and a special "delete entry with given key-value pair" operation. Fixed + * size hash table is used for fast key lookups. */ -static LIST_HEAD(mb_cache_list); -static LIST_HEAD(mb_cache_lru_list); -static DEFINE_SPINLOCK(mb_cache_spinlock); - -static inline void -__spin_lock_mb_cache_entry(struct mb_cache_entry *ce) -{ - spin_lock(bgl_lock_ptr(mb_cache_bg_lock, - MB_CACHE_ENTRY_LOCK_INDEX(ce))); -} - -static inline void -__spin_unlock_mb_cache_entry(struct mb_cache_entry *ce) -{ - spin_unlock(bgl_lock_ptr(mb_cache_bg_lock, - MB_CACHE_ENTRY_LOCK_INDEX(ce))); -} - -static inline int -__mb_cache_entry_is_block_hashed(struct mb_cache_entry *ce) -{ - return !hlist_bl_unhashed(&ce->e_block_list); -} +struct mb_cache { + /* Hash table of entries */ + struct hlist_bl_head *c_hash; + /* log2 of hash table size */ + int c_bucket_bits; + /* Maximum entries in cache to avoid degrading hash too much */ + int c_max_entries; + /* Protects c_list, c_entry_count */ + spinlock_t c_list_lock; + struct list_head c_list; + /* Number of entries in cache */ + unsigned long c_entry_count; + struct shrinker c_shrink; + /* Work for shrinking when the cache has too many entries */ + struct work_struct c_shrink_work; +}; +static struct kmem_cache *mb_entry_cache; -static inline void -__mb_cache_entry_unhash_block(struct mb_cache_entry *ce) -{ - if (__mb_cache_entry_is_block_hashed(ce)) - hlist_bl_del_init(&ce->e_block_list); -} +static unsigned long mb_cache_shrink(struct mb_cache *cache, + unsigned int nr_to_scan); -static inline int -__mb_cache_entry_is_index_hashed(struct mb_cache_entry *ce) +static inline struct hlist_bl_head *mb_cache_entry_head(struct mb_cache *cache, + u32 key) { - return !hlist_bl_unhashed(&ce->e_index.o_list); + return &cache->c_hash[hash_32(key, cache->c_bucket_bits)]; } -static inline void -__mb_cache_entry_unhash_index(struct mb_cache_entry *ce) -{ - if (__mb_cache_entry_is_index_hashed(ce)) - hlist_bl_del_init(&ce->e_index.o_list); -} +/* + * Number of entries to reclaim synchronously when there are too many entries + * in cache + */ +#define SYNC_SHRINK_BATCH 64 /* - * __mb_cache_entry_unhash_unlock() - * - * This function is called to unhash both the block and index hash - * chain. - * It assumes both the block and index hash chain is locked upon entry. - * It also unlock both hash chains both exit + * mb_cache_entry_create - create entry in cache + * @cache - cache where the entry should be created + * @mask - gfp mask with which the entry should be allocated + * @key - key of the entry + * @block - block that contains data + * @reusable - is the block reusable by other inodes? + * + * Creates entry in @cache with key @key and records that data is stored in + * block @block. The function returns -EBUSY if entry with the same key + * and for the same block already exists in cache. Otherwise 0 is returned. */ -static inline void -__mb_cache_entry_unhash_unlock(struct mb_cache_entry *ce) +int mb_cache_entry_create(struct mb_cache *cache, gfp_t mask, u32 key, + sector_t block, bool reusable) { - __mb_cache_entry_unhash_index(ce); - hlist_bl_unlock(ce->e_index_hash_p); - __mb_cache_entry_unhash_block(ce); - hlist_bl_unlock(ce->e_block_hash_p); + struct mb_cache_entry *entry, *dup; + struct hlist_bl_node *dup_node; + struct hlist_bl_head *head; + + /* Schedule background reclaim if there are too many entries */ + if (cache->c_entry_count >= cache->c_max_entries) + schedule_work(&cache->c_shrink_work); + /* Do some sync reclaim if background reclaim cannot keep up */ + if (cache->c_entry_count >= 2*cache->c_max_entries) + mb_cache_shrink(cache, SYNC_SHRINK_BATCH); + + entry = kmem_cache_alloc(mb_entry_cache, mask); + if (!entry) + return -ENOMEM; + + INIT_LIST_HEAD(&entry->e_list); + /* One ref for hash, one ref returned */ + atomic_set(&entry->e_refcnt, 1); + entry->e_key = key; + entry->e_block = block; + entry->e_reusable = reusable; + head = mb_cache_entry_head(cache, key); + hlist_bl_lock(head); + hlist_bl_for_each_entry(dup, dup_node, head, e_hash_list) { + if (dup->e_key == key && dup->e_block == block) { + hlist_bl_unlock(head); + kmem_cache_free(mb_entry_cache, entry); + return -EBUSY; + } + } + hlist_bl_add_head(&entry->e_hash_list, head); + hlist_bl_unlock(head); + + spin_lock(&cache->c_list_lock); + list_add_tail(&entry->e_list, &cache->c_list); + /* Grab ref for LRU list */ + atomic_inc(&entry->e_refcnt); + cache->c_entry_count++; + spin_unlock(&cache->c_list_lock); + + return 0; } +EXPORT_SYMBOL(mb_cache_entry_create); -static void -__mb_cache_entry_forget(struct mb_cache_entry *ce, gfp_t gfp_mask) +void __mb_cache_entry_free(struct mb_cache_entry *entry) { - struct mb_cache *cache = ce->e_cache; - - mb_assert(!(ce->e_used || ce->e_queued || atomic_read(&ce->e_refcnt))); - kmem_cache_free(cache->c_entry_cache, ce); - atomic_dec(&cache->c_entry_count); + kmem_cache_free(mb_entry_cache, entry); } +EXPORT_SYMBOL(__mb_cache_entry_free); -static void -__mb_cache_entry_release(struct mb_cache_entry *ce) +static struct mb_cache_entry *__entry_find(struct mb_cache *cache, + struct mb_cache_entry *entry, + u32 key) { - /* First lock the entry to serialize access to its local data. */ - __spin_lock_mb_cache_entry(ce); - /* Wake up all processes queuing for this cache entry. */ - if (ce->e_queued) - wake_up_all(&mb_cache_queue); - if (ce->e_used >= MB_CACHE_WRITER) - ce->e_used -= MB_CACHE_WRITER; - /* - * Make sure that all cache entries on lru_list have - * both e_used and e_qued of 0s. - */ - ce->e_used--; - if (!(ce->e_used || ce->e_queued || atomic_read(&ce->e_refcnt))) { - if (!__mb_cache_entry_is_block_hashed(ce)) { - __spin_unlock_mb_cache_entry(ce); - goto forget; + struct mb_cache_entry *old_entry = entry; + struct hlist_bl_node *node; + struct hlist_bl_head *head; + + head = mb_cache_entry_head(cache, key); + hlist_bl_lock(head); + if (entry && !hlist_bl_unhashed(&entry->e_hash_list)) + node = entry->e_hash_list.next; + else + node = hlist_bl_first(head); + while (node) { + entry = hlist_bl_entry(node, struct mb_cache_entry, + e_hash_list); + if (entry->e_key == key && entry->e_reusable) { + atomic_inc(&entry->e_refcnt); + goto out; } - /* - * Need access to lru list, first drop entry lock, - * then reacquire the lock in the proper order. - */ - spin_lock(&mb_cache_spinlock); - if (list_empty(&ce->e_lru_list)) - list_add_tail(&ce->e_lru_list, &mb_cache_lru_list); - spin_unlock(&mb_cache_spinlock); + node = node->next; } - __spin_unlock_mb_cache_entry(ce); - return; -forget: - mb_assert(list_empty(&ce->e_lru_list)); - __mb_cache_entry_forget(ce, GFP_KERNEL); + entry = NULL; +out: + hlist_bl_unlock(head); + if (old_entry) + mb_cache_entry_put(cache, old_entry); + + return entry; } /* - * mb_cache_shrink_scan() memory pressure callback - * - * This function is called by the kernel memory management when memory - * gets low. + * mb_cache_entry_find_first - find the first entry in cache with given key + * @cache: cache where we should search + * @key: key to look for * - * @shrink: (ignored) - * @sc: shrink_control passed from reclaim - * - * Returns the number of objects freed. + * Search in @cache for entry with key @key. Grabs reference to the first + * entry found and returns the entry. */ -static unsigned long -mb_cache_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) +struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache, + u32 key) { - LIST_HEAD(free_list); - struct mb_cache_entry *entry, *tmp; - int nr_to_scan = sc->nr_to_scan; - gfp_t gfp_mask = sc->gfp_mask; - unsigned long freed = 0; - - mb_debug("trying to free %d entries", nr_to_scan); - spin_lock(&mb_cache_spinlock); - while ((nr_to_scan-- > 0) && !list_empty(&mb_cache_lru_list)) { - struct mb_cache_entry *ce = - list_entry(mb_cache_lru_list.next, - struct mb_cache_entry, e_lru_list); - list_del_init(&ce->e_lru_list); - if (ce->e_used || ce->e_queued || atomic_read(&ce->e_refcnt)) - continue; - spin_unlock(&mb_cache_spinlock); - /* Prevent any find or get operation on the entry */ - hlist_bl_lock(ce->e_block_hash_p); - hlist_bl_lock(ce->e_index_hash_p); - /* Ignore if it is touched by a find/get */ - if (ce->e_used || ce->e_queued || atomic_read(&ce->e_refcnt) || - !list_empty(&ce->e_lru_list)) { - hlist_bl_unlock(ce->e_index_hash_p); - hlist_bl_unlock(ce->e_block_hash_p); - spin_lock(&mb_cache_spinlock); - continue; - } - __mb_cache_entry_unhash_unlock(ce); - list_add_tail(&ce->e_lru_list, &free_list); - spin_lock(&mb_cache_spinlock); - } - spin_unlock(&mb_cache_spinlock); - - list_for_each_entry_safe(entry, tmp, &free_list, e_lru_list) { - __mb_cache_entry_forget(entry, gfp_mask); - freed++; - } - return freed; + return __entry_find(cache, NULL, key); } +EXPORT_SYMBOL(mb_cache_entry_find_first); -static unsigned long -mb_cache_shrink_count(struct shrinker *shrink, struct shrink_control *sc) +/* + * mb_cache_entry_find_next - find next entry in cache with the same + * @cache: cache where we should search + * @entry: entry to start search from + * + * Finds next entry in the hash chain which has the same key as @entry. + * If @entry is unhashed (which can happen when deletion of entry races + * with the search), finds the first entry in the hash chain. The function + * drops reference to @entry and returns with a reference to the found entry. + */ +struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache *cache, + struct mb_cache_entry *entry) { - struct mb_cache *cache; - unsigned long count = 0; - - spin_lock(&mb_cache_spinlock); - list_for_each_entry(cache, &mb_cache_list, c_cache_list) { - mb_debug("cache %s (%d)", cache->c_name, - atomic_read(&cache->c_entry_count)); - count += atomic_read(&cache->c_entry_count); - } - spin_unlock(&mb_cache_spinlock); - - return vfs_pressure_ratio(count); + return __entry_find(cache, entry, entry->e_key); } - -static struct shrinker mb_cache_shrinker = { - .count_objects = mb_cache_shrink_count, - .scan_objects = mb_cache_shrink_scan, - .seeks = DEFAULT_SEEKS, -}; +EXPORT_SYMBOL(mb_cache_entry_find_next); /* - * mb_cache_create() create a new cache - * - * All entries in one cache are equal size. Cache entries may be from - * multiple devices. If this is the first mbcache created, registers - * the cache with kernel memory management. Returns NULL if no more - * memory was available. - * - * @name: name of the cache (informal) - * @bucket_bits: log2(number of hash buckets) + * mb_cache_entry_get - get a cache entry by block number (and key) + * @cache - cache we work with + * @key - key of block number @block + * @block - block number */ -struct mb_cache * -mb_cache_create(const char *name, int bucket_bits) +struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *cache, u32 key, + sector_t block) { - int n, bucket_count = 1 << bucket_bits; - struct mb_cache *cache = NULL; - - if (!mb_cache_bg_lock) { - mb_cache_bg_lock = kmalloc(sizeof(struct blockgroup_lock), - GFP_KERNEL); - if (!mb_cache_bg_lock) - return NULL; - bgl_lock_init(mb_cache_bg_lock); - } - - cache = kmalloc(sizeof(struct mb_cache), GFP_KERNEL); - if (!cache) - return NULL; - cache->c_name = name; - atomic_set(&cache->c_entry_count, 0); - cache->c_bucket_bits = bucket_bits; - cache->c_block_hash = kmalloc(bucket_count * - sizeof(struct hlist_bl_head), GFP_KERNEL); - if (!cache->c_block_hash) - goto fail; - for (n=0; n<bucket_count; n++) - INIT_HLIST_BL_HEAD(&cache->c_block_hash[n]); - cache->c_index_hash = kmalloc(bucket_count * - sizeof(struct hlist_bl_head), GFP_KERNEL); - if (!cache->c_index_hash) - goto fail; - for (n=0; n<bucket_count; n++) - INIT_HLIST_BL_HEAD(&cache->c_index_hash[n]); - if (!mb_cache_kmem_cache) { - mb_cache_kmem_cache = kmem_cache_create(name, - sizeof(struct mb_cache_entry), 0, - SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL); - if (!mb_cache_kmem_cache) - goto fail2; + struct hlist_bl_node *node; + struct hlist_bl_head *head; + struct mb_cache_entry *entry; + + head = mb_cache_entry_head(cache, key); + hlist_bl_lock(head); + hlist_bl_for_each_entry(entry, node, head, e_hash_list) { + if (entry->e_key == key && entry->e_block == block) { + atomic_inc(&entry->e_refcnt); + goto out; + } } - cache->c_entry_cache = mb_cache_kmem_cache; - - /* - * Set an upper limit on the number of cache entries so that the hash - * chains won't grow too long. - */ - cache->c_max_entries = bucket_count << 4; - - spin_lock(&mb_cache_spinlock); - list_add(&cache->c_cache_list, &mb_cache_list); - spin_unlock(&mb_cache_spinlock); - return cache; - -fail2: - kfree(cache->c_index_hash); - -fail: - kfree(cache->c_block_hash); - kfree(cache); - return NULL; + entry = NULL; +out: + hlist_bl_unlock(head); + return entry; } +EXPORT_SYMBOL(mb_cache_entry_get); - -/* - * mb_cache_shrink() - * - * Removes all cache entries of a device from the cache. All cache entries - * currently in use cannot be freed, and thus remain in the cache. All others - * are freed. +/* mb_cache_entry_delete_block - remove information about block from cache + * @cache - cache we work with + * @key - key of block @block + * @block - block number * - * @bdev: which device's cache entries to shrink + * Remove entry from cache @cache with key @key with data stored in @block. */ -void -mb_cache_shrink(struct block_device *bdev) +void mb_cache_entry_delete_block(struct mb_cache *cache, u32 key, + sector_t block) { - LIST_HEAD(free_list); - struct list_head *l; - struct mb_cache_entry *ce, *tmp; - - l = &mb_cache_lru_list; - spin_lock(&mb_cache_spinlock); - while (!list_is_last(l, &mb_cache_lru_list)) { - l = l->next; - ce = list_entry(l, struct mb_cache_entry, e_lru_list); - if (ce->e_bdev == bdev) { - list_del_init(&ce->e_lru_list); - if (ce->e_used || ce->e_queued || - atomic_read(&ce->e_refcnt)) - continue; - spin_unlock(&mb_cache_spinlock); - /* - * Prevent any find or get operation on the entry. - */ - hlist_bl_lock(ce->e_block_hash_p); - hlist_bl_lock(ce->e_index_hash_p); - /* Ignore if it is touched by a find/get */ - if (ce->e_used || ce->e_queued || - atomic_read(&ce->e_refcnt) || - !list_empty(&ce->e_lru_list)) { - hlist_bl_unlock(ce->e_index_hash_p); - hlist_bl_unlock(ce->e_block_hash_p); - l = &mb_cache_lru_list; - spin_lock(&mb_cache_spinlock); - continue; + struct hlist_bl_node *node; + struct hlist_bl_head *head; + struct mb_cache_entry *entry; + + head = mb_cache_entry_head(cache, key); + hlist_bl_lock(head); + hlist_bl_for_each_entry(entry, node, head, e_hash_list) { + if (entry->e_key == key && entry->e_block == block) { + /* We keep hash list reference to keep entry alive */ + hlist_bl_del_init(&entry->e_hash_list); + hlist_bl_unlock(head); + spin_lock(&cache->c_list_lock); + if (!list_empty(&entry->e_list)) { + list_del_init(&entry->e_list); + cache->c_entry_count--; + atomic_dec(&entry->e_refcnt); } - __mb_cache_entry_unhash_unlock(ce); - mb_assert(!(ce->e_used || ce->e_queued || - atomic_read(&ce->e_refcnt))); - list_add_tail(&ce->e_lru_list, &free_list); - l = &mb_cache_lru_list; - spin_lock(&mb_cache_spinlock); + spin_unlock(&cache->c_list_lock); + mb_cache_entry_put(cache, entry); + return; } } - spin_unlock(&mb_cache_spinlock); - - list_for_each_entry_safe(ce, tmp, &free_list, e_lru_list) { - __mb_cache_entry_forget(ce, GFP_KERNEL); - } + hlist_bl_unlock(head); } +EXPORT_SYMBOL(mb_cache_entry_delete_block); - -/* - * mb_cache_destroy() +/* mb_cache_entry_touch - cache entry got used + * @cache - cache the entry belongs to + * @entry - entry that got used * - * Shrinks the cache to its minimum possible size (hopefully 0 entries), - * and then destroys it. If this was the last mbcache, un-registers the - * mbcache from kernel memory management. + * Marks entry as used to give hit higher chances of surviving in cache. */ -void -mb_cache_destroy(struct mb_cache *cache) +void mb_cache_entry_touch(struct mb_cache *cache, + struct mb_cache_entry *entry) { - LIST_HEAD(free_list); - struct mb_cache_entry *ce, *tmp; - - spin_lock(&mb_cache_spinlock); - list_for_each_entry_safe(ce, tmp, &mb_cache_lru_list, e_lru_list) { - if (ce->e_cache == cache) - list_move_tail(&ce->e_lru_list, &free_list); - } - list_del(&cache->c_cache_list); - spin_unlock(&mb_cache_spinlock); - - list_for_each_entry_safe(ce, tmp, &free_list, e_lru_list) { - list_del_init(&ce->e_lru_list); - /* - * Prevent any find or get operation on the entry. - */ - hlist_bl_lock(ce->e_block_hash_p); - hlist_bl_lock(ce->e_index_hash_p); - mb_assert(!(ce->e_used || ce->e_queued || - atomic_read(&ce->e_refcnt))); - __mb_cache_entry_unhash_unlock(ce); - __mb_cache_entry_forget(ce, GFP_KERNEL); - } - - if (atomic_read(&cache->c_entry_count) > 0) { - mb_error("cache %s: %d orphaned entries", - cache->c_name, - atomic_read(&cache->c_entry_count)); - } - - if (list_empty(&mb_cache_list)) { - kmem_cache_destroy(mb_cache_kmem_cache); - mb_cache_kmem_cache = NULL; - } - kfree(cache->c_index_hash); - kfree(cache->c_block_hash); - kfree(cache); + entry->e_referenced = 1; } +EXPORT_SYMBOL(mb_cache_entry_touch); -/* - * mb_cache_entry_alloc() - * - * Allocates a new cache entry. The new entry will not be valid initially, - * and thus cannot be looked up yet. It should be filled with data, and - * then inserted into the cache using mb_cache_entry_insert(). Returns NULL - * if no more memory was available. - */ -struct mb_cache_entry * -mb_cache_entry_alloc(struct mb_cache *cache, gfp_t gfp_flags) +static unsigned long mb_cache_count(struct shrinker *shrink, + struct shrink_control *sc) { - struct mb_cache_entry *ce; - - if (atomic_read(&cache->c_entry_count) >= cache->c_max_entries) { - struct list_head *l; - - l = &mb_cache_lru_list; - spin_lock(&mb_cache_spinlock); - while (!list_is_last(l, &mb_cache_lru_list)) { - l = l->next; - ce = list_entry(l, struct mb_cache_entry, e_lru_list); - if (ce->e_cache == cache) { - list_del_init(&ce->e_lru_list); - if (ce->e_used || ce->e_queued || - atomic_read(&ce->e_refcnt)) - continue; - spin_unlock(&mb_cache_spinlock); - /* - * Prevent any find or get operation on the - * entry. - */ - hlist_bl_lock(ce->e_block_hash_p); - hlist_bl_lock(ce->e_index_hash_p); - /* Ignore if it is touched by a find/get */ - if (ce->e_used || ce->e_queued || - atomic_read(&ce->e_refcnt) || - !list_empty(&ce->e_lru_list)) { - hlist_bl_unlock(ce->e_index_hash_p); - hlist_bl_unlock(ce->e_block_hash_p); - l = &mb_cache_lru_list; - spin_lock(&mb_cache_spinlock); - continue; - } - mb_assert(list_empty(&ce->e_lru_list)); - mb_assert(!(ce->e_used || ce->e_queued || - atomic_read(&ce->e_refcnt))); - __mb_cache_entry_unhash_unlock(ce); - goto found; - } - } - spin_unlock(&mb_cache_spinlock); - } + struct mb_cache *cache = container_of(shrink, struct mb_cache, + c_shrink); - ce = kmem_cache_alloc(cache->c_entry_cache, gfp_flags); - if (!ce) - return NULL; - atomic_inc(&cache->c_entry_count); - INIT_LIST_HEAD(&ce->e_lru_list); - INIT_HLIST_BL_NODE(&ce->e_block_list); - INIT_HLIST_BL_NODE(&ce->e_index.o_list); - ce->e_cache = cache; - ce->e_queued = 0; - atomic_set(&ce->e_refcnt, 0); -found: - ce->e_block_hash_p = &cache->c_block_hash[0]; - ce->e_index_hash_p = &cache->c_index_hash[0]; - ce->e_used = 1 + MB_CACHE_WRITER; - return ce; + return cache->c_entry_count; } - -/* - * mb_cache_entry_insert() - * - * Inserts an entry that was allocated using mb_cache_entry_alloc() into - * the cache. After this, the cache entry can be looked up, but is not yet - * in the lru list as the caller still holds a handle to it. Returns 0 on - * success, or -EBUSY if a cache entry for that device + inode exists - * already (this may happen after a failed lookup, but when another process - * has inserted the same cache entry in the meantime). - * - * @bdev: device the cache entry belongs to - * @block: block number - * @key: lookup key - */ -int -mb_cache_entry_insert(struct mb_cache_entry *ce, struct block_device *bdev, - sector_t block, unsigned int key) +/* Shrink number of entries in cache */ +static unsigned long mb_cache_shrink(struct mb_cache *cache, + unsigned int nr_to_scan) { - struct mb_cache *cache = ce->e_cache; - unsigned int bucket; - struct hlist_bl_node *l; - struct hlist_bl_head *block_hash_p; - struct hlist_bl_head *index_hash_p; - struct mb_cache_entry *lce; - - mb_assert(ce); - bucket = hash_long((unsigned long)bdev + (block & 0xffffffff), - cache->c_bucket_bits); - block_hash_p = &cache->c_block_hash[bucket]; - hlist_bl_lock(block_hash_p); - hlist_bl_for_each_entry(lce, l, block_hash_p, e_block_list) { - if (lce->e_bdev == bdev && lce->e_block == block) { - hlist_bl_unlock(block_hash_p); - return -EBUSY; + struct mb_cache_entry *entry; + struct hlist_bl_head *head; + unsigned int shrunk = 0; + + spin_lock(&cache->c_list_lock); + while (nr_to_scan-- && !list_empty(&cache->c_list)) { + entry = list_first_entry(&cache->c_list, + struct mb_cache_entry, e_list); + if (entry->e_referenced) { + entry->e_referenced = 0; + list_move_tail(&cache->c_list, &entry->e_list); + continue; } + list_del_init(&entry->e_list); + cache->c_entry_count--; + /* + * We keep LRU list reference so that entry doesn't go away + * from under us. + */ + spin_unlock(&cache->c_list_lock); + head = mb_cache_entry_head(cache, entry->e_key); + hlist_bl_lock(head); + if (!hlist_bl_unhashed(&entry->e_hash_list)) { + hlist_bl_del_init(&entry->e_hash_list); + atomic_dec(&entry->e_refcnt); + } + hlist_bl_unlock(head); + if (mb_cache_entry_put(cache, entry)) + shrunk++; + cond_resched(); + spin_lock(&cache->c_list_lock); } - mb_assert(!__mb_cache_entry_is_block_hashed(ce)); - __mb_cache_entry_unhash_block(ce); - __mb_cache_entry_unhash_index(ce); - ce->e_bdev = bdev; - ce->e_block = block; - ce->e_block_hash_p = block_hash_p; - ce->e_index.o_key = key; - hlist_bl_add_head(&ce->e_block_list, block_hash_p); - hlist_bl_unlock(block_hash_p); - bucket = hash_long(key, cache->c_bucket_bits); - index_hash_p = &cache->c_index_hash[bucket]; - hlist_bl_lock(index_hash_p); - ce->e_index_hash_p = index_hash_p; - hlist_bl_add_head(&ce->e_index.o_list, index_hash_p); - hlist_bl_unlock(index_hash_p); - return 0; -} + spin_unlock(&cache->c_list_lock); + return shrunk; +} -/* - * mb_cache_entry_release() - * - * Release a handle to a cache entry. When the last handle to a cache entry - * is released it is either freed (if it is invalid) or otherwise inserted - * in to the lru list. - */ -void -mb_cache_entry_release(struct mb_cache_entry *ce) +static unsigned long mb_cache_scan(struct shrinker *shrink, + struct shrink_control *sc) { - __mb_cache_entry_release(ce); + int nr_to_scan = sc->nr_to_scan; + struct mb_cache *cache = container_of(shrink, struct mb_cache, + c_shrink); + return mb_cache_shrink(cache, nr_to_scan); } +/* We shrink 1/X of the cache when we have too many entries in it */ +#define SHRINK_DIVISOR 16 -/* - * mb_cache_entry_free() - * - */ -void -mb_cache_entry_free(struct mb_cache_entry *ce) +static void mb_cache_shrink_worker(struct work_struct *work) { - mb_assert(ce); - mb_assert(list_empty(&ce->e_lru_list)); - hlist_bl_lock(ce->e_index_hash_p); - __mb_cache_entry_unhash_index(ce); - hlist_bl_unlock(ce->e_index_hash_p); - hlist_bl_lock(ce->e_block_hash_p); - __mb_cache_entry_unhash_block(ce); - hlist_bl_unlock(ce->e_block_hash_p); - __mb_cache_entry_release(ce); + struct mb_cache *cache = container_of(work, struct mb_cache, + c_shrink_work); + mb_cache_shrink(cache, cache->c_max_entries / SHRINK_DIVISOR); } - /* - * mb_cache_entry_get() + * mb_cache_create - create cache + * @bucket_bits: log2 of the hash table size * - * Get a cache entry by device / block number. (There can only be one entry - * in the cache per device and block.) Returns NULL if no such cache entry - * exists. The returned cache entry is locked for exclusive access ("single - * writer"). + * Create cache for keys with 2^bucket_bits hash entries. */ -struct mb_cache_entry * -mb_cache_entry_get(struct mb_cache *cache, struct block_device *bdev, - sector_t block) +struct mb_cache *mb_cache_create(int bucket_bits) { - unsigned int bucket; - struct hlist_bl_node *l; - struct mb_cache_entry *ce; - struct hlist_bl_head *block_hash_p; - - bucket = hash_long((unsigned long)bdev + (block & 0xffffffff), - cache->c_bucket_bits); - block_hash_p = &cache->c_block_hash[bucket]; - /* First serialize access to the block corresponding hash chain. */ - hlist_bl_lock(block_hash_p); - hlist_bl_for_each_entry(ce, l, block_hash_p, e_block_list) { - mb_assert(ce->e_block_hash_p == block_hash_p); - if (ce->e_bdev == bdev && ce->e_block == block) { - /* - * Prevent a free from removing the entry. - */ - atomic_inc(&ce->e_refcnt); - hlist_bl_unlock(block_hash_p); - __spin_lock_mb_cache_entry(ce); - atomic_dec(&ce->e_refcnt); - if (ce->e_used > 0) { - DEFINE_WAIT(wait); - while (ce->e_used > 0) { - ce->e_queued++; - prepare_to_wait(&mb_cache_queue, &wait, - TASK_UNINTERRUPTIBLE); - __spin_unlock_mb_cache_entry(ce); - schedule(); - __spin_lock_mb_cache_entry(ce); - ce->e_queued--; - } - finish_wait(&mb_cache_queue, &wait); - } - ce->e_used += 1 + MB_CACHE_WRITER; - __spin_unlock_mb_cache_entry(ce); + struct mb_cache *cache; + int bucket_count = 1 << bucket_bits; + int i; - if (!list_empty(&ce->e_lru_list)) { - spin_lock(&mb_cache_spinlock); - list_del_init(&ce->e_lru_list); - spin_unlock(&mb_cache_spinlock); - } - if (!__mb_cache_entry_is_block_hashed(ce)) { - __mb_cache_entry_release(ce); - return NULL; - } - return ce; - } + if (!try_module_get(THIS_MODULE)) + return NULL; + + cache = kzalloc(sizeof(struct mb_cache), GFP_KERNEL); + if (!cache) + goto err_out; + cache->c_bucket_bits = bucket_bits; + cache->c_max_entries = bucket_count << 4; + INIT_LIST_HEAD(&cache->c_list); + spin_lock_init(&cache->c_list_lock); + cache->c_hash = kmalloc(bucket_count * sizeof(struct hlist_bl_head), + GFP_KERNEL); + if (!cache->c_hash) { + kfree(cache); + goto err_out; } - hlist_bl_unlock(block_hash_p); - return NULL; -} + for (i = 0; i < bucket_count; i++) + INIT_HLIST_BL_HEAD(&cache->c_hash[i]); -#if !defined(MB_CACHE_INDEXES_COUNT) || (MB_CACHE_INDEXES_COUNT > 0) + cache->c_shrink.count_objects = mb_cache_count; + cache->c_shrink.scan_objects = mb_cache_scan; + cache->c_shrink.seeks = DEFAULT_SEEKS; + register_shrinker(&cache->c_shrink); -static struct mb_cache_entry * -__mb_cache_entry_find(struct hlist_bl_node *l, struct hlist_bl_head *head, - struct block_device *bdev, unsigned int key) -{ + INIT_WORK(&cache->c_shrink_work, mb_cache_shrink_worker); - /* The index hash chain is alredy acquire by caller. */ - while (l != NULL) { - struct mb_cache_entry *ce = - hlist_bl_entry(l, struct mb_cache_entry, - e_index.o_list); - mb_assert(ce->e_index_hash_p == head); - if (ce->e_bdev == bdev && ce->e_index.o_key == key) { - /* - * Prevent a free from removing the entry. - */ - atomic_inc(&ce->e_refcnt); - hlist_bl_unlock(head); - __spin_lock_mb_cache_entry(ce); - atomic_dec(&ce->e_refcnt); - ce->e_used++; - /* Incrementing before holding the lock gives readers - priority over writers. */ - if (ce->e_used >= MB_CACHE_WRITER) { - DEFINE_WAIT(wait); - - while (ce->e_used >= MB_CACHE_WRITER) { - ce->e_queued++; - prepare_to_wait(&mb_cache_queue, &wait, - TASK_UNINTERRUPTIBLE); - __spin_unlock_mb_cache_entry(ce); - schedule(); - __spin_lock_mb_cache_entry(ce); - ce->e_queued--; - } - finish_wait(&mb_cache_queue, &wait); - } - __spin_unlock_mb_cache_entry(ce); - if (!list_empty(&ce->e_lru_list)) { - spin_lock(&mb_cache_spinlock); - list_del_init(&ce->e_lru_list); - spin_unlock(&mb_cache_spinlock); - } - if (!__mb_cache_entry_is_block_hashed(ce)) { - __mb_cache_entry_release(ce); - return ERR_PTR(-EAGAIN); - } - return ce; - } - l = l->next; - } - hlist_bl_unlock(head); + return cache; + +err_out: + module_put(THIS_MODULE); return NULL; } - +EXPORT_SYMBOL(mb_cache_create); /* - * mb_cache_entry_find_first() - * - * Find the first cache entry on a given device with a certain key in - * an additional index. Additional matches can be found with - * mb_cache_entry_find_next(). Returns NULL if no match was found. The - * returned cache entry is locked for shared access ("multiple readers"). + * mb_cache_destroy - destroy cache + * @cache: the cache to destroy * - * @cache: the cache to search - * @bdev: the device the cache entry should belong to - * @key: the key in the index + * Free all entries in cache and cache itself. Caller must make sure nobody + * (except shrinker) can reach @cache when calling this. */ -struct mb_cache_entry * -mb_cache_entry_find_first(struct mb_cache *cache, struct block_device *bdev, - unsigned int key) +void mb_cache_destroy(struct mb_cache *cache) { - unsigned int bucket = hash_long(key, cache->c_bucket_bits); - struct hlist_bl_node *l; - struct mb_cache_entry *ce = NULL; - struct hlist_bl_head *index_hash_p; - - index_hash_p = &cache->c_index_hash[bucket]; - hlist_bl_lock(index_hash_p); - if (!hlist_bl_empty(index_hash_p)) { - l = hlist_bl_first(index_hash_p); - ce = __mb_cache_entry_find(l, index_hash_p, bdev, key); - } else - hlist_bl_unlock(index_hash_p); - return ce; -} + struct mb_cache_entry *entry, *next; + unregister_shrinker(&cache->c_shrink); -/* - * mb_cache_entry_find_next() - * - * Find the next cache entry on a given device with a certain key in an - * additional index. Returns NULL if no match could be found. The previous - * entry is atomatically released, so that mb_cache_entry_find_next() can - * be called like this: - * - * entry = mb_cache_entry_find_first(); - * while (entry) { - * ... - * entry = mb_cache_entry_find_next(entry, ...); - * } - * - * @prev: The previous match - * @bdev: the device the cache entry should belong to - * @key: the key in the index - */ -struct mb_cache_entry * -mb_cache_entry_find_next(struct mb_cache_entry *prev, - struct block_device *bdev, unsigned int key) -{ - struct mb_cache *cache = prev->e_cache; - unsigned int bucket = hash_long(key, cache->c_bucket_bits); - struct hlist_bl_node *l; - struct mb_cache_entry *ce; - struct hlist_bl_head *index_hash_p; - - index_hash_p = &cache->c_index_hash[bucket]; - mb_assert(prev->e_index_hash_p == index_hash_p); - hlist_bl_lock(index_hash_p); - mb_assert(!hlist_bl_empty(index_hash_p)); - l = prev->e_index.o_list.next; - ce = __mb_cache_entry_find(l, index_hash_p, bdev, key); - __mb_cache_entry_release(prev); - return ce; + /* + * We don't bother with any locking. Cache must not be used at this + * point. + */ + list_for_each_entry_safe(entry, next, &cache->c_list, e_list) { + if (!hlist_bl_unhashed(&entry->e_hash_list)) { + hlist_bl_del_init(&entry->e_hash_list); + atomic_dec(&entry->e_refcnt); + } else + WARN_ON(1); + list_del(&entry->e_list); + WARN_ON(atomic_read(&entry->e_refcnt) != 1); + mb_cache_entry_put(cache, entry); + } + kfree(cache->c_hash); + kfree(cache); + module_put(THIS_MODULE); } +EXPORT_SYMBOL(mb_cache_destroy); -#endif /* !defined(MB_CACHE_INDEXES_COUNT) || (MB_CACHE_INDEXES_COUNT > 0) */ - -static int __init init_mbcache(void) +static int __init mbcache_init(void) { - register_shrinker(&mb_cache_shrinker); + mb_entry_cache = kmem_cache_create("mbcache", + sizeof(struct mb_cache_entry), 0, + SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL); + BUG_ON(!mb_entry_cache); return 0; } -static void __exit exit_mbcache(void) +static void __exit mbcache_exit(void) { - unregister_shrinker(&mb_cache_shrinker); + kmem_cache_destroy(mb_entry_cache); } -module_init(init_mbcache) -module_exit(exit_mbcache) +module_init(mbcache_init) +module_exit(mbcache_exit) +MODULE_AUTHOR("Jan Kara <jack@suse.cz>"); +MODULE_DESCRIPTION("Meta block cache (for extended attributes)"); +MODULE_LICENSE("GPL"); @@ -24,6 +24,7 @@ #include <linux/highmem.h> #include <linux/prefetch.h> #include <linux/mpage.h> +#include <linux/mm_inline.h> #include <linux/writeback.h> #include <linux/backing-dev.h> #include <linux/pagevec.h> @@ -366,7 +367,7 @@ mpage_readpages(struct address_space *mapping, struct list_head *pages, map_bh.b_state = 0; map_bh.b_size = 0; for (page_idx = 0; page_idx < nr_pages; page_idx++) { - struct page *page = list_entry(pages->prev, struct page, lru); + struct page *page = lru_to_page(pages); prefetchw(&page->flags); list_del(&page->lru); diff --git a/fs/nfs/blocklayout/extent_tree.c b/fs/nfs/blocklayout/extent_tree.c index c59a59c..35ab51c 100644 --- a/fs/nfs/blocklayout/extent_tree.c +++ b/fs/nfs/blocklayout/extent_tree.c @@ -476,6 +476,7 @@ static void ext_tree_free_commitdata(struct nfs4_layoutcommit_args *arg, for (i = 0; i < nr_pages; i++) put_page(arg->layoutupdate_pages[i]); + vfree(arg->start_p); kfree(arg->layoutupdate_pages); } else { put_page(arg->layoutupdate_page); @@ -559,10 +560,15 @@ retry: if (unlikely(arg->layoutupdate_pages != &arg->layoutupdate_page)) { void *p = start_p, *end = p + arg->layoutupdate_len; + struct page *page = NULL; int i = 0; - for ( ; p < end; p += PAGE_SIZE) - arg->layoutupdate_pages[i++] = vmalloc_to_page(p); + arg->start_p = start_p; + for ( ; p < end; p += PAGE_SIZE) { + page = vmalloc_to_page(p); + arg->layoutupdate_pages[i++] = page; + get_page(page); + } } dprintk("%s found %zu ranges\n", __func__, count); diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c index bd25dc7..dff8346 100644 --- a/fs/nfs/nfs42proc.c +++ b/fs/nfs/nfs42proc.c @@ -16,29 +16,8 @@ #define NFSDBG_FACILITY NFSDBG_PROC -static int nfs42_set_rw_stateid(nfs4_stateid *dst, struct file *file, - fmode_t fmode) -{ - struct nfs_open_context *open; - struct nfs_lock_context *lock; - int ret; - - open = get_nfs_open_context(nfs_file_open_context(file)); - lock = nfs_get_lock_context(open); - if (IS_ERR(lock)) { - put_nfs_open_context(open); - return PTR_ERR(lock); - } - - ret = nfs4_set_rw_stateid(dst, open, lock, fmode); - - nfs_put_lock_context(lock); - put_nfs_open_context(open); - return ret; -} - static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, - loff_t offset, loff_t len) + struct nfs_lock_context *lock, loff_t offset, loff_t len) { struct inode *inode = file_inode(filep); struct nfs_server *server = NFS_SERVER(inode); @@ -56,7 +35,8 @@ static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, msg->rpc_argp = &args; msg->rpc_resp = &res; - status = nfs42_set_rw_stateid(&args.falloc_stateid, filep, FMODE_WRITE); + status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context, + lock, FMODE_WRITE); if (status) return status; @@ -78,15 +58,26 @@ static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, { struct nfs_server *server = NFS_SERVER(file_inode(filep)); struct nfs4_exception exception = { }; + struct nfs_lock_context *lock; int err; + lock = nfs_get_lock_context(nfs_file_open_context(filep)); + if (IS_ERR(lock)) + return PTR_ERR(lock); + + exception.inode = file_inode(filep); + exception.state = lock->open_context->state; + do { - err = _nfs42_proc_fallocate(msg, filep, offset, len); - if (err == -ENOTSUPP) - return -EOPNOTSUPP; + err = _nfs42_proc_fallocate(msg, filep, lock, offset, len); + if (err == -ENOTSUPP) { + err = -EOPNOTSUPP; + break; + } err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); + nfs_put_lock_context(lock); return err; } @@ -135,7 +126,8 @@ int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) return err; } -static loff_t _nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) +static loff_t _nfs42_proc_llseek(struct file *filep, + struct nfs_lock_context *lock, loff_t offset, int whence) { struct inode *inode = file_inode(filep); struct nfs42_seek_args args = { @@ -156,7 +148,8 @@ static loff_t _nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) if (!nfs_server_capable(inode, NFS_CAP_SEEK)) return -ENOTSUPP; - status = nfs42_set_rw_stateid(&args.sa_stateid, filep, FMODE_READ); + status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context, + lock, FMODE_READ); if (status) return status; @@ -175,17 +168,28 @@ loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) { struct nfs_server *server = NFS_SERVER(file_inode(filep)); struct nfs4_exception exception = { }; + struct nfs_lock_context *lock; loff_t err; + lock = nfs_get_lock_context(nfs_file_open_context(filep)); + if (IS_ERR(lock)) + return PTR_ERR(lock); + + exception.inode = file_inode(filep); + exception.state = lock->open_context->state; + do { - err = _nfs42_proc_llseek(filep, offset, whence); + err = _nfs42_proc_llseek(filep, lock, offset, whence); if (err >= 0) break; - if (err == -ENOTSUPP) - return -EOPNOTSUPP; + if (err == -ENOTSUPP) { + err = -EOPNOTSUPP; + break; + } err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); + nfs_put_lock_context(lock); return err; } @@ -298,8 +302,9 @@ int nfs42_proc_layoutstats_generic(struct nfs_server *server, } static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, - struct file *dst_f, loff_t src_offset, - loff_t dst_offset, loff_t count) + struct file *dst_f, struct nfs_lock_context *src_lock, + struct nfs_lock_context *dst_lock, loff_t src_offset, + loff_t dst_offset, loff_t count) { struct inode *src_inode = file_inode(src_f); struct inode *dst_inode = file_inode(dst_f); @@ -320,11 +325,13 @@ static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, msg->rpc_argp = &args; msg->rpc_resp = &res; - status = nfs42_set_rw_stateid(&args.src_stateid, src_f, FMODE_READ); + status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, + src_lock, FMODE_READ); if (status) return status; - status = nfs42_set_rw_stateid(&args.dst_stateid, dst_f, FMODE_WRITE); + status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, + dst_lock, FMODE_WRITE); if (status) return status; @@ -349,22 +356,48 @@ int nfs42_proc_clone(struct file *src_f, struct file *dst_f, }; struct inode *inode = file_inode(src_f); struct nfs_server *server = NFS_SERVER(file_inode(src_f)); - struct nfs4_exception exception = { }; - int err; + struct nfs_lock_context *src_lock; + struct nfs_lock_context *dst_lock; + struct nfs4_exception src_exception = { }; + struct nfs4_exception dst_exception = { }; + int err, err2; if (!nfs_server_capable(inode, NFS_CAP_CLONE)) return -EOPNOTSUPP; + src_lock = nfs_get_lock_context(nfs_file_open_context(src_f)); + if (IS_ERR(src_lock)) + return PTR_ERR(src_lock); + + src_exception.inode = file_inode(src_f); + src_exception.state = src_lock->open_context->state; + + dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f)); + if (IS_ERR(dst_lock)) { + err = PTR_ERR(dst_lock); + goto out_put_src_lock; + } + + dst_exception.inode = file_inode(dst_f); + dst_exception.state = dst_lock->open_context->state; + do { - err = _nfs42_proc_clone(&msg, src_f, dst_f, src_offset, - dst_offset, count); + err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock, + src_offset, dst_offset, count); if (err == -ENOTSUPP || err == -EOPNOTSUPP) { NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; - return -EOPNOTSUPP; + err = -EOPNOTSUPP; + break; } - err = nfs4_handle_exception(server, err, &exception); - } while (exception.retry); - return err; + err2 = nfs4_handle_exception(server, err, &src_exception); + err = nfs4_handle_exception(server, err, &dst_exception); + if (!err) + err = err2; + } while (src_exception.retry || dst_exception.retry); + nfs_put_lock_context(dst_lock); +out_put_src_lock: + nfs_put_lock_context(src_lock); + return err; } diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 482b6e9..2fa483e 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -252,6 +252,27 @@ pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) } } +/* + * Mark a pnfs_layout_hdr and all associated layout segments as invalid + * + * In order to continue using the pnfs_layout_hdr, a full recovery + * is required. + * Note that caller must hold inode->i_lock. + */ +static int +pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, + struct list_head *lseg_list) +{ + struct pnfs_layout_range range = { + .iomode = IOMODE_ANY, + .offset = 0, + .length = NFS4_MAX_UINT64, + }; + + set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); + return pnfs_mark_matching_lsegs_invalid(lo, lseg_list, &range); +} + static int pnfs_iomode_to_fail_bit(u32 iomode) { @@ -554,9 +575,8 @@ pnfs_destroy_layout(struct nfs_inode *nfsi) spin_lock(&nfsi->vfs_inode.i_lock); lo = nfsi->layout; if (lo) { - lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ - pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); pnfs_get_layout_hdr(lo); + pnfs_mark_layout_stateid_invalid(lo, &tmp_list); pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); spin_unlock(&nfsi->vfs_inode.i_lock); @@ -617,11 +637,6 @@ pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, { struct pnfs_layout_hdr *lo; struct inode *inode; - struct pnfs_layout_range range = { - .iomode = IOMODE_ANY, - .offset = 0, - .length = NFS4_MAX_UINT64, - }; LIST_HEAD(lseg_list); int ret = 0; @@ -636,11 +651,11 @@ pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, spin_lock(&inode->i_lock); list_del_init(&lo->plh_bulk_destroy); - lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ - if (is_bulk_recall) - set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); - if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range)) + if (pnfs_mark_layout_stateid_invalid(lo, &lseg_list)) { + if (is_bulk_recall) + set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); ret = -EAGAIN; + } spin_unlock(&inode->i_lock); pnfs_free_lseg_list(&lseg_list); /* Free all lsegs that are attached to commit buckets */ @@ -1738,8 +1753,19 @@ pnfs_set_plh_return_iomode(struct pnfs_layout_hdr *lo, enum pnfs_iomode iomode) if (lo->plh_return_iomode != 0) iomode = IOMODE_ANY; lo->plh_return_iomode = iomode; + set_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); } +/** + * pnfs_mark_matching_lsegs_return - Free or return matching layout segments + * @lo: pointer to layout header + * @tmp_list: list header to be used with pnfs_free_lseg_list() + * @return_range: describe layout segment ranges to be returned + * + * This function is mainly intended for use by layoutrecall. It attempts + * to free the layout segment immediately, or else to mark it for return + * as soon as its reference count drops to zero. + */ int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, struct list_head *tmp_list, @@ -1762,12 +1788,11 @@ pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, lseg, lseg->pls_range.iomode, lseg->pls_range.offset, lseg->pls_range.length); + if (mark_lseg_invalid(lseg, tmp_list)) + continue; + remaining++; set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); pnfs_set_plh_return_iomode(lo, return_range->iomode); - if (!mark_lseg_invalid(lseg, tmp_list)) - remaining++; - set_bit(NFS_LAYOUT_RETURN_REQUESTED, - &lo->plh_flags); } return remaining; } diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index dc8ebec..195fe26 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -32,10 +32,10 @@ * */ +#include <crypto/hash.h> #include <linux/file.h> #include <linux/slab.h> #include <linux/namei.h> -#include <linux/crypto.h> #include <linux/sched.h> #include <linux/fs.h> #include <linux/module.h> @@ -104,29 +104,35 @@ static int nfs4_make_rec_clidname(char *dname, const struct xdr_netobj *clname) { struct xdr_netobj cksum; - struct hash_desc desc; - struct scatterlist sg; + struct crypto_shash *tfm; int status; dprintk("NFSD: nfs4_make_rec_clidname for %.*s\n", clname->len, clname->data); - desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; - desc.tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC); - if (IS_ERR(desc.tfm)) { - status = PTR_ERR(desc.tfm); + tfm = crypto_alloc_shash("md5", 0, 0); + if (IS_ERR(tfm)) { + status = PTR_ERR(tfm); goto out_no_tfm; } - cksum.len = crypto_hash_digestsize(desc.tfm); + cksum.len = crypto_shash_digestsize(tfm); cksum.data = kmalloc(cksum.len, GFP_KERNEL); if (cksum.data == NULL) { status = -ENOMEM; goto out; } - sg_init_one(&sg, clname->data, clname->len); + { + SHASH_DESC_ON_STACK(desc, tfm); + + desc->tfm = tfm; + desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; + + status = crypto_shash_digest(desc, clname->data, clname->len, + cksum.data); + shash_desc_zero(desc); + } - status = crypto_hash_digest(&desc, &sg, sg.length, cksum.data); if (status) goto out; @@ -135,7 +141,7 @@ nfs4_make_rec_clidname(char *dname, const struct xdr_netobj *clname) status = 0; out: kfree(cksum.data); - crypto_free_hash(desc.tfm); + crypto_free_shash(tfm); out_no_tfm: return status; } diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c index 45d650a..c20df77 100644 --- a/fs/nilfs2/page.c +++ b/fs/nilfs2/page.c @@ -180,7 +180,7 @@ void nilfs_page_bug(struct page *page) printk(KERN_CRIT "NILFS_PAGE_BUG(%p): cnt=%d index#=%llu flags=0x%lx " "mapping=%p ino=%lu\n", - page, atomic_read(&page->_count), + page, page_ref_count(page), (unsigned long long)page->index, page->flags, m, ino); if (page_has_buffers(page)) { diff --git a/fs/notify/mark.c b/fs/notify/mark.c index cfcbf11..7115c5d 100644 --- a/fs/notify/mark.c +++ b/fs/notify/mark.c @@ -91,7 +91,14 @@ #include <linux/fsnotify_backend.h> #include "fsnotify.h" +#define FSNOTIFY_REAPER_DELAY (1) /* 1 jiffy */ + struct srcu_struct fsnotify_mark_srcu; +static DEFINE_SPINLOCK(destroy_lock); +static LIST_HEAD(destroy_list); + +static void fsnotify_mark_destroy(struct work_struct *work); +static DECLARE_DELAYED_WORK(reaper_work, fsnotify_mark_destroy); void fsnotify_get_mark(struct fsnotify_mark *mark) { @@ -165,19 +172,10 @@ void fsnotify_detach_mark(struct fsnotify_mark *mark) atomic_dec(&group->num_marks); } -static void -fsnotify_mark_free_rcu(struct rcu_head *rcu) -{ - struct fsnotify_mark *mark; - - mark = container_of(rcu, struct fsnotify_mark, g_rcu); - fsnotify_put_mark(mark); -} - /* - * Free fsnotify mark. The freeing is actually happening from a call_srcu - * callback. Caller must have a reference to the mark or be protected by - * fsnotify_mark_srcu. + * Free fsnotify mark. The freeing is actually happening from a kthread which + * first waits for srcu period end. Caller must have a reference to the mark + * or be protected by fsnotify_mark_srcu. */ void fsnotify_free_mark(struct fsnotify_mark *mark) { @@ -192,7 +190,11 @@ void fsnotify_free_mark(struct fsnotify_mark *mark) mark->flags &= ~FSNOTIFY_MARK_FLAG_ALIVE; spin_unlock(&mark->lock); - call_srcu(&fsnotify_mark_srcu, &mark->g_rcu, fsnotify_mark_free_rcu); + spin_lock(&destroy_lock); + list_add(&mark->g_list, &destroy_list); + spin_unlock(&destroy_lock); + queue_delayed_work(system_unbound_wq, &reaper_work, + FSNOTIFY_REAPER_DELAY); /* * Some groups like to know that marks are being freed. This is a @@ -388,7 +390,12 @@ err: spin_unlock(&mark->lock); - call_srcu(&fsnotify_mark_srcu, &mark->g_rcu, fsnotify_mark_free_rcu); + spin_lock(&destroy_lock); + list_add(&mark->g_list, &destroy_list); + spin_unlock(&destroy_lock); + queue_delayed_work(system_unbound_wq, &reaper_work, + FSNOTIFY_REAPER_DELAY); + return ret; } @@ -491,3 +498,21 @@ void fsnotify_init_mark(struct fsnotify_mark *mark, atomic_set(&mark->refcnt, 1); mark->free_mark = free_mark; } + +static void fsnotify_mark_destroy(struct work_struct *work) +{ + struct fsnotify_mark *mark, *next; + struct list_head private_destroy_list; + + spin_lock(&destroy_lock); + /* exchange the list head */ + list_replace_init(&destroy_list, &private_destroy_list); + spin_unlock(&destroy_lock); + + synchronize_srcu(&fsnotify_mark_srcu); + + list_for_each_entry_safe(mark, next, &private_destroy_list, g_list) { + list_del_init(&mark->g_list); + fsnotify_put_mark(mark); + } +} diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 794fd15..cda0361 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -956,6 +956,7 @@ clean_orphan: tmp_ret = ocfs2_del_inode_from_orphan(osb, inode, di_bh, update_isize, end); if (tmp_ret < 0) { + ocfs2_inode_unlock(inode, 1); ret = tmp_ret; mlog_errno(ret); brelse(di_bh); diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c index a76b9ea..ef6a2ec 100644 --- a/fs/ocfs2/cluster/heartbeat.c +++ b/fs/ocfs2/cluster/heartbeat.c @@ -287,7 +287,6 @@ struct o2hb_bio_wait_ctxt { static void o2hb_write_timeout(struct work_struct *work) { int failed, quorum; - unsigned long flags; struct o2hb_region *reg = container_of(work, struct o2hb_region, hr_write_timeout_work.work); @@ -297,14 +296,14 @@ static void o2hb_write_timeout(struct work_struct *work) jiffies_to_msecs(jiffies - reg->hr_last_timeout_start)); if (o2hb_global_heartbeat_active()) { - spin_lock_irqsave(&o2hb_live_lock, flags); + spin_lock(&o2hb_live_lock); if (test_bit(reg->hr_region_num, o2hb_quorum_region_bitmap)) set_bit(reg->hr_region_num, o2hb_failed_region_bitmap); failed = bitmap_weight(o2hb_failed_region_bitmap, O2NM_MAX_REGIONS); quorum = bitmap_weight(o2hb_quorum_region_bitmap, O2NM_MAX_REGIONS); - spin_unlock_irqrestore(&o2hb_live_lock, flags); + spin_unlock(&o2hb_live_lock); mlog(ML_HEARTBEAT, "Number of regions %d, failed regions %d\n", quorum, failed); @@ -2425,11 +2424,10 @@ EXPORT_SYMBOL_GPL(o2hb_check_node_heartbeating); int o2hb_check_node_heartbeating_no_sem(u8 node_num) { unsigned long testing_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; - unsigned long flags; - spin_lock_irqsave(&o2hb_live_lock, flags); + spin_lock(&o2hb_live_lock); o2hb_fill_node_map_from_callback(testing_map, sizeof(testing_map)); - spin_unlock_irqrestore(&o2hb_live_lock, flags); + spin_unlock(&o2hb_live_lock); if (!test_bit(node_num, testing_map)) { mlog(ML_HEARTBEAT, "node (%u) does not have heartbeating enabled.\n", diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c index ebe5438..b17d180 100644 --- a/fs/ocfs2/cluster/nodemanager.c +++ b/fs/ocfs2/cluster/nodemanager.c @@ -630,7 +630,6 @@ static void o2nm_cluster_release(struct config_item *item) { struct o2nm_cluster *cluster = to_o2nm_cluster(item); - kfree(cluster->cl_group.default_groups); kfree(cluster); } @@ -666,7 +665,6 @@ static struct config_group *o2nm_cluster_group_make_group(struct config_group *g struct o2nm_cluster *cluster = NULL; struct o2nm_node_group *ns = NULL; struct config_group *o2hb_group = NULL, *ret = NULL; - void *defs = NULL; /* this runs under the parent dir's i_mutex; there can be only * one caller in here at a time */ @@ -675,20 +673,18 @@ static struct config_group *o2nm_cluster_group_make_group(struct config_group *g cluster = kzalloc(sizeof(struct o2nm_cluster), GFP_KERNEL); ns = kzalloc(sizeof(struct o2nm_node_group), GFP_KERNEL); - defs = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL); o2hb_group = o2hb_alloc_hb_set(); - if (cluster == NULL || ns == NULL || o2hb_group == NULL || defs == NULL) + if (cluster == NULL || ns == NULL || o2hb_group == NULL) goto out; config_group_init_type_name(&cluster->cl_group, name, &o2nm_cluster_type); + configfs_add_default_group(&ns->ns_group, &cluster->cl_group); + config_group_init_type_name(&ns->ns_group, "node", &o2nm_node_group_type); + configfs_add_default_group(o2hb_group, &cluster->cl_group); - cluster->cl_group.default_groups = defs; - cluster->cl_group.default_groups[0] = &ns->ns_group; - cluster->cl_group.default_groups[1] = o2hb_group; - cluster->cl_group.default_groups[2] = NULL; rwlock_init(&cluster->cl_nodes_lock); cluster->cl_node_ip_tree = RB_ROOT; cluster->cl_reconnect_delay_ms = O2NET_RECONNECT_DELAY_MS_DEFAULT; @@ -704,7 +700,6 @@ out: kfree(cluster); kfree(ns); o2hb_free_hb_set(o2hb_group); - kfree(defs); ret = ERR_PTR(-ENOMEM); } @@ -714,18 +709,11 @@ out: static void o2nm_cluster_group_drop_item(struct config_group *group, struct config_item *item) { struct o2nm_cluster *cluster = to_o2nm_cluster(item); - int i; - struct config_item *killme; BUG_ON(o2nm_single_cluster != cluster); o2nm_single_cluster = NULL; - for (i = 0; cluster->cl_group.default_groups[i]; i++) { - killme = &cluster->cl_group.default_groups[i]->cg_item; - cluster->cl_group.default_groups[i] = NULL; - config_item_put(killme); - } - + configfs_remove_default_groups(&cluster->cl_group); config_item_put(item); } diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h index 68c607e..004f2cb 100644 --- a/fs/ocfs2/dlm/dlmcommon.h +++ b/fs/ocfs2/dlm/dlmcommon.h @@ -282,6 +282,7 @@ static inline void __dlm_set_joining_node(struct dlm_ctxt *dlm, #define DLM_LOCK_RES_DROPPING_REF 0x00000040 #define DLM_LOCK_RES_BLOCK_DIRTY 0x00001000 #define DLM_LOCK_RES_SETREF_INPROG 0x00002000 +#define DLM_LOCK_RES_RECOVERY_WAITING 0x00004000 /* max milliseconds to wait to sync up a network failure with a node death */ #define DLM_NODE_DEATH_WAIT_MAX (5 * 1000) @@ -451,6 +452,7 @@ enum { DLM_QUERY_REGION = 519, DLM_QUERY_NODEINFO = 520, DLM_BEGIN_EXIT_DOMAIN_MSG = 521, + DLM_DEREF_LOCKRES_DONE = 522, }; struct dlm_reco_node_data @@ -545,7 +547,7 @@ struct dlm_master_requery * }; * * from ../cluster/tcp.h - * NET_MAX_PAYLOAD_BYTES (4096 - sizeof(net_msg)) + * O2NET_MAX_PAYLOAD_BYTES (4096 - sizeof(net_msg)) * (roughly 4080 bytes) * and sizeof(dlm_migratable_lockres) = 112 bytes * and sizeof(dlm_migratable_lock) = 16 bytes @@ -586,7 +588,7 @@ struct dlm_migratable_lockres /* from above, 128 bytes * for some undetermined future use */ -#define DLM_MIG_LOCKRES_RESERVED (NET_MAX_PAYLOAD_BYTES - \ +#define DLM_MIG_LOCKRES_RESERVED (O2NET_MAX_PAYLOAD_BYTES - \ DLM_MIG_LOCKRES_MAX_LEN) struct dlm_create_lock @@ -782,6 +784,20 @@ struct dlm_deref_lockres u8 name[O2NM_MAX_NAME_LEN]; }; +enum { + DLM_DEREF_RESPONSE_DONE = 0, + DLM_DEREF_RESPONSE_INPROG = 1, +}; + +struct dlm_deref_lockres_done { + u32 pad1; + u16 pad2; + u8 node_idx; + u8 namelen; + + u8 name[O2NM_MAX_NAME_LEN]; +}; + static inline enum dlm_status __dlm_lockres_state_to_status(struct dlm_lock_resource *res) { @@ -789,7 +805,8 @@ __dlm_lockres_state_to_status(struct dlm_lock_resource *res) assert_spin_locked(&res->spinlock); - if (res->state & DLM_LOCK_RES_RECOVERING) + if (res->state & (DLM_LOCK_RES_RECOVERING| + DLM_LOCK_RES_RECOVERY_WAITING)) status = DLM_RECOVERING; else if (res->state & DLM_LOCK_RES_MIGRATING) status = DLM_MIGRATING; @@ -968,6 +985,8 @@ int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data, void dlm_assert_master_post_handler(int status, void *data, void *ret_data); int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data, void **ret_data); +int dlm_deref_lockres_done_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data, void **ret_data); int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data, @@ -1009,6 +1028,7 @@ static inline void __dlm_wait_on_lockres(struct dlm_lock_resource *res) { __dlm_wait_on_lockres_flags(res, (DLM_LOCK_RES_IN_PROGRESS| DLM_LOCK_RES_RECOVERING| + DLM_LOCK_RES_RECOVERY_WAITING| DLM_LOCK_RES_MIGRATING)); } diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c index 2ee7fe7..12e064b 100644 --- a/fs/ocfs2/dlm/dlmdomain.c +++ b/fs/ocfs2/dlm/dlmdomain.c @@ -132,10 +132,13 @@ static DECLARE_WAIT_QUEUE_HEAD(dlm_domain_events); * - Message DLM_QUERY_NODEINFO added to allow online node removes * New in version 1.2: * - Message DLM_BEGIN_EXIT_DOMAIN_MSG added to mark start of exit domain + * New in version 1.3: + * - Message DLM_DEREF_LOCKRES_DONE added to inform non-master that the + * refmap is cleared */ static const struct dlm_protocol_version dlm_protocol = { .pv_major = 1, - .pv_minor = 2, + .pv_minor = 3, }; #define DLM_DOMAIN_BACKOFF_MS 200 @@ -1396,7 +1399,7 @@ static int dlm_send_join_cancels(struct dlm_ctxt *dlm, unsigned int map_size) { int status, tmpstat; - unsigned int node; + int node; if (map_size != (BITS_TO_LONGS(O2NM_MAX_NODES) * sizeof(unsigned long))) { @@ -1853,7 +1856,13 @@ static int dlm_register_domain_handlers(struct dlm_ctxt *dlm) sizeof(struct dlm_exit_domain), dlm_begin_exit_domain_handler, dlm, NULL, &dlm->dlm_domain_handlers); + if (status) + goto bail; + status = o2net_register_handler(DLM_DEREF_LOCKRES_DONE, dlm->key, + sizeof(struct dlm_deref_lockres_done), + dlm_deref_lockres_done_handler, + dlm, NULL, &dlm->dlm_domain_handlers); bail: if (status) dlm_unregister_domain_handlers(dlm); diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c index 9477d6e..9aed6e2 100644 --- a/fs/ocfs2/dlm/dlmmaster.c +++ b/fs/ocfs2/dlm/dlmmaster.c @@ -2278,7 +2278,7 @@ int dlm_drop_lockres_ref(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) dlm_print_one_lock_resource(res); BUG(); } - return ret; + return ret ? ret : r; } int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data, @@ -2345,7 +2345,7 @@ int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data, res->lockname.len, res->lockname.name, node); dlm_print_one_lock_resource(res); } - ret = 0; + ret = DLM_DEREF_RESPONSE_DONE; goto done; } @@ -2365,7 +2365,7 @@ int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data, spin_unlock(&dlm->work_lock); queue_work(dlm->dlm_worker, &dlm->dispatched_work); - return 0; + return DLM_DEREF_RESPONSE_INPROG; done: if (res) @@ -2375,6 +2375,122 @@ done: return ret; } +int dlm_deref_lockres_done_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) +{ + struct dlm_ctxt *dlm = data; + struct dlm_deref_lockres_done *deref + = (struct dlm_deref_lockres_done *)msg->buf; + struct dlm_lock_resource *res = NULL; + char *name; + unsigned int namelen; + int ret = -EINVAL; + u8 node; + unsigned int hash; + + if (!dlm_grab(dlm)) + return 0; + + name = deref->name; + namelen = deref->namelen; + node = deref->node_idx; + + if (namelen > DLM_LOCKID_NAME_MAX) { + mlog(ML_ERROR, "Invalid name length!"); + goto done; + } + if (deref->node_idx >= O2NM_MAX_NODES) { + mlog(ML_ERROR, "Invalid node number: %u\n", node); + goto done; + } + + hash = dlm_lockid_hash(name, namelen); + + spin_lock(&dlm->spinlock); + res = __dlm_lookup_lockres_full(dlm, name, namelen, hash); + if (!res) { + spin_unlock(&dlm->spinlock); + mlog(ML_ERROR, "%s:%.*s: bad lockres name\n", + dlm->name, namelen, name); + goto done; + } + + spin_lock(&res->spinlock); + BUG_ON(!(res->state & DLM_LOCK_RES_DROPPING_REF)); + if (!list_empty(&res->purge)) { + mlog(0, "%s: Removing res %.*s from purgelist\n", + dlm->name, res->lockname.len, res->lockname.name); + list_del_init(&res->purge); + dlm_lockres_put(res); + dlm->purge_count--; + } + + if (!__dlm_lockres_unused(res)) { + mlog(ML_ERROR, "%s: res %.*s in use after deref\n", + dlm->name, res->lockname.len, res->lockname.name); + __dlm_print_one_lock_resource(res); + BUG(); + } + + __dlm_unhash_lockres(dlm, res); + + spin_lock(&dlm->track_lock); + if (!list_empty(&res->tracking)) + list_del_init(&res->tracking); + else { + mlog(ML_ERROR, "%s: Resource %.*s not on the Tracking list\n", + dlm->name, res->lockname.len, res->lockname.name); + __dlm_print_one_lock_resource(res); + } + spin_unlock(&dlm->track_lock); + + /* lockres is not in the hash now. drop the flag and wake up + * any processes waiting in dlm_get_lock_resource. + */ + res->state &= ~DLM_LOCK_RES_DROPPING_REF; + spin_unlock(&res->spinlock); + wake_up(&res->wq); + + dlm_lockres_put(res); + + spin_unlock(&dlm->spinlock); + +done: + dlm_put(dlm); + return ret; +} + +static void dlm_drop_lockres_ref_done(struct dlm_ctxt *dlm, + struct dlm_lock_resource *res, u8 node) +{ + struct dlm_deref_lockres_done deref; + int ret = 0, r; + const char *lockname; + unsigned int namelen; + + lockname = res->lockname.name; + namelen = res->lockname.len; + BUG_ON(namelen > O2NM_MAX_NAME_LEN); + + memset(&deref, 0, sizeof(deref)); + deref.node_idx = dlm->node_num; + deref.namelen = namelen; + memcpy(deref.name, lockname, namelen); + + ret = o2net_send_message(DLM_DEREF_LOCKRES_DONE, dlm->key, + &deref, sizeof(deref), node, &r); + if (ret < 0) { + mlog(ML_ERROR, "%s: res %.*s, error %d send DEREF DONE " + " to node %u\n", dlm->name, namelen, + lockname, ret, node); + } else if (r < 0) { + /* ignore the error */ + mlog(ML_ERROR, "%s: res %.*s, DEREF to node %u got %d\n", + dlm->name, namelen, lockname, node, r); + dlm_print_one_lock_resource(res); + } +} + static void dlm_deref_lockres_worker(struct dlm_work_item *item, void *data) { struct dlm_ctxt *dlm; @@ -2395,6 +2511,8 @@ static void dlm_deref_lockres_worker(struct dlm_work_item *item, void *data) } spin_unlock(&res->spinlock); + dlm_drop_lockres_ref_done(dlm, res, node); + if (cleared) { mlog(0, "%s:%.*s node %u ref dropped in dispatch\n", dlm->name, res->lockname.len, res->lockname.name, node); @@ -2432,7 +2550,8 @@ static int dlm_is_lockres_migrateable(struct dlm_ctxt *dlm, return 0; /* delay migration when the lockres is in RECOCERING state */ - if (res->state & DLM_LOCK_RES_RECOVERING) + if (res->state & (DLM_LOCK_RES_RECOVERING| + DLM_LOCK_RES_RECOVERY_WAITING)) return 0; if (res->owner != dlm->node_num) diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c index b94a425..cd38488 100644 --- a/fs/ocfs2/dlm/dlmrecovery.c +++ b/fs/ocfs2/dlm/dlmrecovery.c @@ -1403,12 +1403,24 @@ int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data, * and RECOVERY flag changed when it completes. */ hash = dlm_lockid_hash(mres->lockname, mres->lockname_len); spin_lock(&dlm->spinlock); - res = __dlm_lookup_lockres(dlm, mres->lockname, mres->lockname_len, + res = __dlm_lookup_lockres_full(dlm, mres->lockname, mres->lockname_len, hash); if (res) { /* this will get a ref on res */ /* mark it as recovering/migrating and hash it */ spin_lock(&res->spinlock); + if (res->state & DLM_LOCK_RES_DROPPING_REF) { + mlog(0, "%s: node is attempting to migrate " + "lockres %.*s, but marked as dropping " + " ref!\n", dlm->name, + mres->lockname_len, mres->lockname); + ret = -EINVAL; + spin_unlock(&res->spinlock); + spin_unlock(&dlm->spinlock); + dlm_lockres_put(res); + goto leave; + } + if (mres->flags & DLM_MRES_RECOVERY) { res->state |= DLM_LOCK_RES_RECOVERING; } else { @@ -2163,6 +2175,13 @@ static void dlm_finish_local_lockres_recovery(struct dlm_ctxt *dlm, for (i = 0; i < DLM_HASH_BUCKETS; i++) { bucket = dlm_lockres_hash(dlm, i); hlist_for_each_entry(res, bucket, hash_node) { + if (res->state & DLM_LOCK_RES_RECOVERY_WAITING) { + spin_lock(&res->spinlock); + res->state &= ~DLM_LOCK_RES_RECOVERY_WAITING; + spin_unlock(&res->spinlock); + wake_up(&res->wq); + } + if (!(res->state & DLM_LOCK_RES_RECOVERING)) continue; @@ -2300,6 +2319,7 @@ static void dlm_free_dead_locks(struct dlm_ctxt *dlm, res->lockname.len, res->lockname.name, freed, dead_node); __dlm_print_one_lock_resource(res); } + res->state |= DLM_LOCK_RES_RECOVERY_WAITING; dlm_lockres_clear_refmap_bit(dlm, res, dead_node); } else if (test_bit(dead_node, res->refmap)) { mlog(0, "%s:%.*s: dead node %u had a ref, but had " @@ -2377,14 +2397,16 @@ static void dlm_do_local_recovery_cleanup(struct dlm_ctxt *dlm, u8 dead_node) dlm_revalidate_lvb(dlm, res, dead_node); if (res->owner == dead_node) { if (res->state & DLM_LOCK_RES_DROPPING_REF) { - mlog(ML_NOTICE, "%s: res %.*s, Skip " - "recovery as it is being freed\n", - dlm->name, res->lockname.len, - res->lockname.name); - } else - dlm_move_lockres_to_recovery_list(dlm, - res); - + mlog(0, "%s:%.*s: owned by " + "dead node %u, this node was " + "dropping its ref when it died. " + "continue, dropping the flag.\n", + dlm->name, res->lockname.len, + res->lockname.name, dead_node); + } + res->state &= ~DLM_LOCK_RES_DROPPING_REF; + dlm_move_lockres_to_recovery_list(dlm, + res); } else if (res->owner == dlm->node_num) { dlm_free_dead_locks(dlm, res, dead_node); __dlm_lockres_calc_usage(dlm, res); diff --git a/fs/ocfs2/dlm/dlmthread.c b/fs/ocfs2/dlm/dlmthread.c index c5f6c24..68d239b 100644 --- a/fs/ocfs2/dlm/dlmthread.c +++ b/fs/ocfs2/dlm/dlmthread.c @@ -106,7 +106,8 @@ int __dlm_lockres_unused(struct dlm_lock_resource *res) if (!list_empty(&res->dirty) || res->state & DLM_LOCK_RES_DIRTY) return 0; - if (res->state & DLM_LOCK_RES_RECOVERING) + if (res->state & (DLM_LOCK_RES_RECOVERING| + DLM_LOCK_RES_RECOVERY_WAITING)) return 0; /* Another node has this resource with this node as the master */ @@ -202,6 +203,13 @@ static void dlm_purge_lockres(struct dlm_ctxt *dlm, dlm->purge_count--; } + if (!master && ret != 0) { + mlog(0, "%s: deref %.*s in progress or master goes down\n", + dlm->name, res->lockname.len, res->lockname.name); + spin_unlock(&res->spinlock); + return; + } + if (!__dlm_lockres_unused(res)) { mlog(ML_ERROR, "%s: res %.*s in use after deref\n", dlm->name, res->lockname.len, res->lockname.name); @@ -700,7 +708,8 @@ static int dlm_thread(void *data) * dirty for a short while. */ BUG_ON(res->state & DLM_LOCK_RES_MIGRATING); if (res->state & (DLM_LOCK_RES_IN_PROGRESS | - DLM_LOCK_RES_RECOVERING)) { + DLM_LOCK_RES_RECOVERING | + DLM_LOCK_RES_RECOVERY_WAITING)) { /* move it to the tail and keep going */ res->state &= ~DLM_LOCK_RES_DIRTY; spin_unlock(&res->spinlock); diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c index 9581d190..77ebc2b 100644 --- a/fs/ocfs2/mmap.c +++ b/fs/ocfs2/mmap.c @@ -147,6 +147,10 @@ static int ocfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) ret = ocfs2_inode_lock(inode, &di_bh, 1); if (ret < 0) { mlog_errno(ret); + if (ret == -ENOMEM) + ret = VM_FAULT_OOM; + else + ret = VM_FAULT_SIGBUS; goto out; } diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index faa1365..302854e 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -236,6 +236,7 @@ static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) struct ocfs2_recovery_map *rm = osb->recovery_map; struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; int i, out = 0; + unsigned long flags; out += snprintf(buf + out, len - out, "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", @@ -271,14 +272,14 @@ static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) cconn->cc_version.pv_minor); } - spin_lock(&osb->dc_task_lock); + spin_lock_irqsave(&osb->dc_task_lock, flags); out += snprintf(buf + out, len - out, "%10s => Pid: %d Count: %lu WakeSeq: %lu " "WorkSeq: %lu\n", "DownCnvt", (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), osb->blocked_lock_count, osb->dc_wake_sequence, osb->dc_work_sequence); - spin_unlock(&osb->dc_task_lock); + spin_unlock_irqrestore(&osb->dc_task_lock, flags); spin_lock(&osb->osb_lock); out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c index ed95272..52f6de5 100644 --- a/fs/overlayfs/dir.c +++ b/fs/overlayfs/dir.c @@ -618,7 +618,8 @@ static int ovl_remove_upper(struct dentry *dentry, bool is_dir) * sole user of this dentry. Too tricky... Just unhash for * now. */ - d_drop(dentry); + if (!err) + d_drop(dentry); inode_unlock(dir); return err; @@ -903,6 +904,13 @@ static int ovl_rename2(struct inode *olddir, struct dentry *old, if (!overwrite && new_is_dir && !old_opaque && new_opaque) ovl_remove_opaque(newdentry); + /* + * Old dentry now lives in different location. Dentries in + * lowerstack are stale. We cannot drop them here because + * access to them is lockless. This could be only pure upper + * or opaque directory - numlower is zero. Or upper non-dir + * entry - its pureness is tracked by flag opaque. + */ if (old_opaque != new_opaque) { ovl_dentry_set_opaque(old, new_opaque); if (!overwrite) diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index 49e2045..a4ff5d0 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -65,6 +65,8 @@ int ovl_setattr(struct dentry *dentry, struct iattr *attr) inode_lock(upperdentry->d_inode); err = notify_change(upperdentry, attr, NULL); + if (!err) + ovl_copyattr(upperdentry->d_inode, dentry->d_inode); inode_unlock(upperdentry->d_inode); } ovl_drop_write(dentry); diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 8d826bd..619ad4b 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -76,12 +76,14 @@ enum ovl_path_type ovl_path_type(struct dentry *dentry) if (oe->__upperdentry) { type = __OVL_PATH_UPPER; - if (oe->numlower) { - if (S_ISDIR(dentry->d_inode->i_mode)) - type |= __OVL_PATH_MERGE; - } else if (!oe->opaque) { + /* + * Non-dir dentry can hold lower dentry from previous + * location. Its purity depends only on opaque flag. + */ + if (oe->numlower && S_ISDIR(dentry->d_inode->i_mode)) + type |= __OVL_PATH_MERGE; + else if (!oe->opaque) type |= __OVL_PATH_PURE; - } } else { if (oe->numlower > 1) type |= __OVL_PATH_MERGE; @@ -341,6 +343,7 @@ static const struct dentry_operations ovl_dentry_operations = { static const struct dentry_operations ovl_reval_dentry_operations = { .d_release = ovl_dentry_release, + .d_select_inode = ovl_d_select_inode, .d_revalidate = ovl_dentry_revalidate, .d_weak_revalidate = ovl_dentry_weak_revalidate, }; diff --git a/fs/proc/base.c b/fs/proc/base.c index 4f764c2..b1755b2 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -434,7 +434,7 @@ static int proc_pid_wchan(struct seq_file *m, struct pid_namespace *ns, && !lookup_symbol_name(wchan, symname)) seq_printf(m, "%s", symname); else - seq_putc(m, '0'); + seq_puts(m, "0\n"); return 0; } @@ -2158,6 +2158,7 @@ static const struct file_operations proc_map_files_operations = { .llseek = default_llseek, }; +#ifdef CONFIG_CHECKPOINT_RESTORE struct timers_private { struct pid *pid; struct task_struct *task; @@ -2256,6 +2257,73 @@ static const struct file_operations proc_timers_operations = { .llseek = seq_lseek, .release = seq_release_private, }; +#endif + +static ssize_t timerslack_ns_write(struct file *file, const char __user *buf, + size_t count, loff_t *offset) +{ + struct inode *inode = file_inode(file); + struct task_struct *p; + u64 slack_ns; + int err; + + err = kstrtoull_from_user(buf, count, 10, &slack_ns); + if (err < 0) + return err; + + p = get_proc_task(inode); + if (!p) + return -ESRCH; + + if (ptrace_may_access(p, PTRACE_MODE_ATTACH_FSCREDS)) { + task_lock(p); + if (slack_ns == 0) + p->timer_slack_ns = p->default_timer_slack_ns; + else + p->timer_slack_ns = slack_ns; + task_unlock(p); + } else + count = -EPERM; + + put_task_struct(p); + + return count; +} + +static int timerslack_ns_show(struct seq_file *m, void *v) +{ + struct inode *inode = m->private; + struct task_struct *p; + int err = 0; + + p = get_proc_task(inode); + if (!p) + return -ESRCH; + + if (ptrace_may_access(p, PTRACE_MODE_ATTACH_FSCREDS)) { + task_lock(p); + seq_printf(m, "%llu\n", p->timer_slack_ns); + task_unlock(p); + } else + err = -EPERM; + + put_task_struct(p); + + return err; +} + +static int timerslack_ns_open(struct inode *inode, struct file *filp) +{ + return single_open(filp, timerslack_ns_show, inode); +} + +static const struct file_operations proc_pid_set_timerslack_ns_operations = { + .open = timerslack_ns_open, + .read = seq_read, + .write = timerslack_ns_write, + .llseek = seq_lseek, + .release = single_release, +}; static int proc_pident_instantiate(struct inode *dir, struct dentry *dentry, struct task_struct *task, const void *ptr) @@ -2831,6 +2899,7 @@ static const struct pid_entry tgid_base_stuff[] = { #ifdef CONFIG_CHECKPOINT_RESTORE REG("timers", S_IRUGO, proc_timers_operations), #endif + REG("timerslack_ns", S_IRUGO|S_IWUGO, proc_pid_set_timerslack_ns_operations), }; static int proc_tgid_base_readdir(struct file *file, struct dir_context *ctx) diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c index df4661a..8372046 100644 --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -29,10 +29,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v) unsigned long committed; long cached; long available; - unsigned long pagecache; - unsigned long wmark_low = 0; unsigned long pages[NR_LRU_LISTS]; - struct zone *zone; int lru; /* @@ -51,33 +48,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v) for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++) pages[lru] = global_page_state(NR_LRU_BASE + lru); - for_each_zone(zone) - wmark_low += zone->watermark[WMARK_LOW]; - - /* - * Estimate the amount of memory available for userspace allocations, - * without causing swapping. - */ - available = i.freeram - totalreserve_pages; - - /* - * Not all the page cache can be freed, otherwise the system will - * start swapping. Assume at least half of the page cache, or the - * low watermark worth of cache, needs to stay. - */ - pagecache = pages[LRU_ACTIVE_FILE] + pages[LRU_INACTIVE_FILE]; - pagecache -= min(pagecache / 2, wmark_low); - available += pagecache; - - /* - * Part of the reclaimable slab consists of items that are in use, - * and cannot be freed. Cap this estimate at the low watermark. - */ - available += global_page_state(NR_SLAB_RECLAIMABLE) - - min(global_page_state(NR_SLAB_RECLAIMABLE) / 2, wmark_low); - - if (available < 0) - available = 0; + available = si_mem_available(); /* * Tagged format, for easy grepping and expansion. diff --git a/fs/proc/page.c b/fs/proc/page.c index b2855ee..712f1b9 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -103,9 +103,9 @@ u64 stable_page_flags(struct page *page) * pseudo flags for the well known (anonymous) memory mapped pages * * Note that page->_mapcount is overloaded in SLOB/SLUB/SLQB, so the - * simple test in page_mapcount() is not enough. + * simple test in page_mapped() is not enough. */ - if (!PageSlab(page) && page_mapcount(page)) + if (!PageSlab(page) && page_mapped(page)) u |= 1 << KPF_MMAP; if (PageAnon(page)) u |= 1 << KPF_ANON; @@ -148,6 +148,8 @@ u64 stable_page_flags(struct page *page) */ if (PageBuddy(page)) u |= 1 << KPF_BUDDY; + else if (page_count(page) == 0 && is_free_buddy_page(page)) + u |= 1 << KPF_BUDDY; if (PageBalloon(page)) u |= 1 << KPF_BALLOON; @@ -158,6 +160,8 @@ u64 stable_page_flags(struct page *page) u |= kpf_copy_bit(k, KPF_LOCKED, PG_locked); u |= kpf_copy_bit(k, KPF_SLAB, PG_slab); + if (PageTail(page) && PageSlab(compound_head(page))) + u |= 1 << KPF_SLAB; u |= kpf_copy_bit(k, KPF_ERROR, PG_error); u |= kpf_copy_bit(k, KPF_DIRTY, PG_dirty); diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 4e61388..55bb57e 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -231,7 +231,9 @@ static ssize_t __read_vmcore(char *buffer, size_t buflen, loff_t *fpos, list_for_each_entry(m, &vmcore_list, list) { if (*fpos < m->offset + m->size) { - tsz = min_t(size_t, m->offset + m->size - *fpos, buflen); + tsz = (size_t)min_t(unsigned long long, + m->offset + m->size - *fpos, + buflen); start = m->paddr + *fpos - m->offset; tmp = read_from_oldmem(buffer, tsz, &start, userbuf); if (tmp < 0) @@ -461,7 +463,8 @@ static int mmap_vmcore(struct file *file, struct vm_area_struct *vma) if (start < m->offset + m->size) { u64 paddr = 0; - tsz = min_t(size_t, m->offset + m->size - start, size); + tsz = (size_t)min_t(unsigned long long, + m->offset + m->size - start, size); paddr = m->paddr + start - m->offset; if (vmcore_remap_oldmem_pfn(vma, vma->vm_start + len, paddr >> PAGE_SHIFT, tsz, diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 319c3a6..bd9812e 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -55,8 +55,8 @@ static ulong ramoops_pmsg_size = MIN_MEM_SIZE; module_param_named(pmsg_size, ramoops_pmsg_size, ulong, 0400); MODULE_PARM_DESC(pmsg_size, "size of user space message log"); -static ulong mem_address; -module_param(mem_address, ulong, 0400); +static unsigned long long mem_address; +module_param(mem_address, ullong, 0400); MODULE_PARM_DESC(mem_address, "start of reserved RAM used to store oops/panic logs"); diff --git a/fs/select.c b/fs/select.c index 79d0d49..8692939 100644 --- a/fs/select.c +++ b/fs/select.c @@ -70,9 +70,9 @@ static long __estimate_accuracy(struct timespec *tv) return slack; } -long select_estimate_accuracy(struct timespec *tv) +u64 select_estimate_accuracy(struct timespec *tv) { - unsigned long ret; + u64 ret; struct timespec now; /* @@ -402,7 +402,7 @@ int do_select(int n, fd_set_bits *fds, struct timespec *end_time) struct poll_wqueues table; poll_table *wait; int retval, i, timed_out = 0; - unsigned long slack = 0; + u64 slack = 0; unsigned int busy_flag = net_busy_loop_on() ? POLL_BUSY_LOOP : 0; unsigned long busy_end = 0; @@ -784,7 +784,7 @@ static int do_poll(struct poll_list *list, struct poll_wqueues *wait, poll_table* pt = &wait->pt; ktime_t expire, *to = NULL; int timed_out = 0, count = 0; - unsigned long slack = 0; + u64 slack = 0; unsigned int busy_flag = net_busy_loop_on() ? POLL_BUSY_LOOP : 0; unsigned long busy_end = 0; @@ -415,6 +415,7 @@ void generic_shutdown_super(struct super_block *sb) sb->s_flags &= ~MS_ACTIVE; fsnotify_unmount_inodes(sb); + cgroup_writeback_umount(); evict_inodes(sb); diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c index 5031170..66cdb44 100644 --- a/fs/userfaultfd.c +++ b/fs/userfaultfd.c @@ -287,6 +287,12 @@ int handle_userfault(struct vm_area_struct *vma, unsigned long address, goto out; /* + * We don't do userfault handling for the final child pid update. + */ + if (current->flags & PF_EXITING) + goto out; + + /* * Check that we can return VM_FAULT_RETRY. * * NOTE: it should become possible to return VM_FAULT_RETRY diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 379c089..5c57b7b 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -55,7 +55,7 @@ xfs_count_page_state( } while ((bh = bh->b_this_page) != head); } -STATIC struct block_device * +struct block_device * xfs_find_bdev_for_inode( struct inode *inode) { @@ -1208,6 +1208,10 @@ xfs_vm_writepages( struct writeback_control *wbc) { xfs_iflags_clear(XFS_I(mapping->host), XFS_ITRUNCATED); + if (dax_mapping(mapping)) + return dax_writeback_mapping_range(mapping, + xfs_find_bdev_for_inode(mapping->host), wbc); + return generic_writepages(mapping, wbc); } @@ -1953,7 +1957,6 @@ xfs_vm_set_page_dirty( loff_t end_offset; loff_t offset; int newly_dirty; - struct mem_cgroup *memcg; if (unlikely(!mapping)) return !TestSetPageDirty(page); @@ -1974,10 +1977,10 @@ xfs_vm_set_page_dirty( } while (bh != head); } /* - * Use mem_group_begin_page_stat() to keep PageDirty synchronized with - * per-memcg dirty page counters. + * Lock out page->mem_cgroup migration to keep PageDirty + * synchronized with per-memcg dirty page counters. */ - memcg = mem_cgroup_begin_page_stat(page); + lock_page_memcg(page); newly_dirty = !TestSetPageDirty(page); spin_unlock(&mapping->private_lock); @@ -1988,13 +1991,13 @@ xfs_vm_set_page_dirty( spin_lock_irqsave(&mapping->tree_lock, flags); if (page->mapping) { /* Race with truncate? */ WARN_ON_ONCE(!PageUptodate(page)); - account_page_dirtied(page, mapping, memcg); + account_page_dirtied(page, mapping); radix_tree_tag_set(&mapping->page_tree, page_index(page), PAGECACHE_TAG_DIRTY); } spin_unlock_irqrestore(&mapping->tree_lock, flags); } - mem_cgroup_end_page_stat(memcg); + unlock_page_memcg(page); if (newly_dirty) __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); return newly_dirty; diff --git a/fs/xfs/xfs_aops.h b/fs/xfs/xfs_aops.h index f6ffc9a..a4343c6 100644 --- a/fs/xfs/xfs_aops.h +++ b/fs/xfs/xfs_aops.h @@ -62,5 +62,6 @@ int xfs_get_blocks_dax_fault(struct inode *inode, sector_t offset, struct buffer_head *map_bh, int create); extern void xfs_count_page_state(struct page *, int *, int *); +extern struct block_device *xfs_find_bdev_for_inode(struct inode *); #endif /* __XFS_AOPS_H__ */ diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index 45ec9e4..6c87601 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -75,7 +75,8 @@ xfs_zero_extent( ssize_t size = XFS_FSB_TO_B(mp, count_fsb); if (IS_DAX(VFS_I(ip))) - return dax_clear_blocks(VFS_I(ip), block, size); + return dax_clear_sectors(xfs_find_bdev_for_inode(VFS_I(ip)), + sector, size); /* * let the block layer decide on the fastest method of diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 594f7e6..be55688 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -1109,27 +1109,10 @@ xlog_verify_head( bool tmp_wrapped; /* - * Search backwards through the log looking for the log record header - * block. This wraps all the way back around to the head so something is - * seriously wrong if we can't find it. - */ - found = xlog_rseek_logrec_hdr(log, *head_blk, *head_blk, 1, bp, rhead_blk, - rhead, wrapped); - if (found < 0) - return found; - if (!found) { - xfs_warn(log->l_mp, "%s: couldn't find sync record", __func__); - return -EIO; - } - - *tail_blk = BLOCK_LSN(be64_to_cpu((*rhead)->h_tail_lsn)); - - /* - * Now that we have a tail block, check the head of the log for torn - * writes. Search again until we hit the tail or the maximum number of - * log record I/Os that could have been in flight at one time. Use a - * temporary buffer so we don't trash the rhead/bp pointer from the - * call above. + * Check the head of the log for torn writes. Search backwards from the + * head until we hit the tail or the maximum number of log record I/Os + * that could have been in flight at one time. Use a temporary buffer so + * we don't trash the rhead/bp pointers from the caller. */ tmp_bp = xlog_get_bp(log, 1); if (!tmp_bp) @@ -1216,6 +1199,115 @@ xlog_verify_head( } /* + * Check whether the head of the log points to an unmount record. In other + * words, determine whether the log is clean. If so, update the in-core state + * appropriately. + */ +static int +xlog_check_unmount_rec( + struct xlog *log, + xfs_daddr_t *head_blk, + xfs_daddr_t *tail_blk, + struct xlog_rec_header *rhead, + xfs_daddr_t rhead_blk, + struct xfs_buf *bp, + bool *clean) +{ + struct xlog_op_header *op_head; + xfs_daddr_t umount_data_blk; + xfs_daddr_t after_umount_blk; + int hblks; + int error; + char *offset; + + *clean = false; + + /* + * Look for unmount record. If we find it, then we know there was a + * clean unmount. Since 'i' could be the last block in the physical + * log, we convert to a log block before comparing to the head_blk. + * + * Save the current tail lsn to use to pass to xlog_clear_stale_blocks() + * below. We won't want to clear the unmount record if there is one, so + * we pass the lsn of the unmount record rather than the block after it. + */ + if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { + int h_size = be32_to_cpu(rhead->h_size); + int h_version = be32_to_cpu(rhead->h_version); + + if ((h_version & XLOG_VERSION_2) && + (h_size > XLOG_HEADER_CYCLE_SIZE)) { + hblks = h_size / XLOG_HEADER_CYCLE_SIZE; + if (h_size % XLOG_HEADER_CYCLE_SIZE) + hblks++; + } else { + hblks = 1; + } + } else { + hblks = 1; + } + after_umount_blk = rhead_blk + hblks + BTOBB(be32_to_cpu(rhead->h_len)); + after_umount_blk = do_mod(after_umount_blk, log->l_logBBsize); + if (*head_blk == after_umount_blk && + be32_to_cpu(rhead->h_num_logops) == 1) { + umount_data_blk = rhead_blk + hblks; + umount_data_blk = do_mod(umount_data_blk, log->l_logBBsize); + error = xlog_bread(log, umount_data_blk, 1, bp, &offset); + if (error) + return error; + + op_head = (struct xlog_op_header *)offset; + if (op_head->oh_flags & XLOG_UNMOUNT_TRANS) { + /* + * Set tail and last sync so that newly written log + * records will point recovery to after the current + * unmount record. + */ + xlog_assign_atomic_lsn(&log->l_tail_lsn, + log->l_curr_cycle, after_umount_blk); + xlog_assign_atomic_lsn(&log->l_last_sync_lsn, + log->l_curr_cycle, after_umount_blk); + *tail_blk = after_umount_blk; + + *clean = true; + } + } + + return 0; +} + +static void +xlog_set_state( + struct xlog *log, + xfs_daddr_t head_blk, + struct xlog_rec_header *rhead, + xfs_daddr_t rhead_blk, + bool bump_cycle) +{ + /* + * Reset log values according to the state of the log when we + * crashed. In the case where head_blk == 0, we bump curr_cycle + * one because the next write starts a new cycle rather than + * continuing the cycle of the last good log record. At this + * point we have guaranteed that all partial log records have been + * accounted for. Therefore, we know that the last good log record + * written was complete and ended exactly on the end boundary + * of the physical log. + */ + log->l_prev_block = rhead_blk; + log->l_curr_block = (int)head_blk; + log->l_curr_cycle = be32_to_cpu(rhead->h_cycle); + if (bump_cycle) + log->l_curr_cycle++; + atomic64_set(&log->l_tail_lsn, be64_to_cpu(rhead->h_tail_lsn)); + atomic64_set(&log->l_last_sync_lsn, be64_to_cpu(rhead->h_lsn)); + xlog_assign_grant_head(&log->l_reserve_head.grant, log->l_curr_cycle, + BBTOB(log->l_curr_block)); + xlog_assign_grant_head(&log->l_write_head.grant, log->l_curr_cycle, + BBTOB(log->l_curr_block)); +} + +/* * Find the sync block number or the tail of the log. * * This will be the block number of the last record to have its @@ -1238,22 +1330,20 @@ xlog_find_tail( xfs_daddr_t *tail_blk) { xlog_rec_header_t *rhead; - xlog_op_header_t *op_head; char *offset = NULL; xfs_buf_t *bp; int error; - xfs_daddr_t umount_data_blk; - xfs_daddr_t after_umount_blk; xfs_daddr_t rhead_blk; xfs_lsn_t tail_lsn; - int hblks; bool wrapped = false; + bool clean = false; /* * Find previous log record */ if ((error = xlog_find_head(log, head_blk))) return error; + ASSERT(*head_blk < INT_MAX); bp = xlog_get_bp(log, 1); if (!bp) @@ -1271,100 +1361,75 @@ xlog_find_tail( } /* - * Trim the head block back to skip over torn records. We can have - * multiple log I/Os in flight at any time, so we assume CRC failures - * back through the previous several records are torn writes and skip - * them. + * Search backwards through the log looking for the log record header + * block. This wraps all the way back around to the head so something is + * seriously wrong if we can't find it. */ - ASSERT(*head_blk < INT_MAX); - error = xlog_verify_head(log, head_blk, tail_blk, bp, &rhead_blk, - &rhead, &wrapped); - if (error) - goto done; + error = xlog_rseek_logrec_hdr(log, *head_blk, *head_blk, 1, bp, + &rhead_blk, &rhead, &wrapped); + if (error < 0) + return error; + if (!error) { + xfs_warn(log->l_mp, "%s: couldn't find sync record", __func__); + return -EIO; + } + *tail_blk = BLOCK_LSN(be64_to_cpu(rhead->h_tail_lsn)); /* - * Reset log values according to the state of the log when we - * crashed. In the case where head_blk == 0, we bump curr_cycle - * one because the next write starts a new cycle rather than - * continuing the cycle of the last good log record. At this - * point we have guaranteed that all partial log records have been - * accounted for. Therefore, we know that the last good log record - * written was complete and ended exactly on the end boundary - * of the physical log. + * Set the log state based on the current head record. */ - log->l_prev_block = rhead_blk; - log->l_curr_block = (int)*head_blk; - log->l_curr_cycle = be32_to_cpu(rhead->h_cycle); - if (wrapped) - log->l_curr_cycle++; - atomic64_set(&log->l_tail_lsn, be64_to_cpu(rhead->h_tail_lsn)); - atomic64_set(&log->l_last_sync_lsn, be64_to_cpu(rhead->h_lsn)); - xlog_assign_grant_head(&log->l_reserve_head.grant, log->l_curr_cycle, - BBTOB(log->l_curr_block)); - xlog_assign_grant_head(&log->l_write_head.grant, log->l_curr_cycle, - BBTOB(log->l_curr_block)); + xlog_set_state(log, *head_blk, rhead, rhead_blk, wrapped); + tail_lsn = atomic64_read(&log->l_tail_lsn); /* - * Look for unmount record. If we find it, then we know there - * was a clean unmount. Since 'i' could be the last block in - * the physical log, we convert to a log block before comparing - * to the head_blk. + * Look for an unmount record at the head of the log. This sets the log + * state to determine whether recovery is necessary. + */ + error = xlog_check_unmount_rec(log, head_blk, tail_blk, rhead, + rhead_blk, bp, &clean); + if (error) + goto done; + + /* + * Verify the log head if the log is not clean (e.g., we have anything + * but an unmount record at the head). This uses CRC verification to + * detect and trim torn writes. If discovered, CRC failures are + * considered torn writes and the log head is trimmed accordingly. * - * Save the current tail lsn to use to pass to - * xlog_clear_stale_blocks() below. We won't want to clear the - * unmount record if there is one, so we pass the lsn of the - * unmount record rather than the block after it. + * Note that we can only run CRC verification when the log is dirty + * because there's no guarantee that the log data behind an unmount + * record is compatible with the current architecture. */ - if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { - int h_size = be32_to_cpu(rhead->h_size); - int h_version = be32_to_cpu(rhead->h_version); + if (!clean) { + xfs_daddr_t orig_head = *head_blk; - if ((h_version & XLOG_VERSION_2) && - (h_size > XLOG_HEADER_CYCLE_SIZE)) { - hblks = h_size / XLOG_HEADER_CYCLE_SIZE; - if (h_size % XLOG_HEADER_CYCLE_SIZE) - hblks++; - } else { - hblks = 1; - } - } else { - hblks = 1; - } - after_umount_blk = rhead_blk + hblks + BTOBB(be32_to_cpu(rhead->h_len)); - after_umount_blk = do_mod(after_umount_blk, log->l_logBBsize); - tail_lsn = atomic64_read(&log->l_tail_lsn); - if (*head_blk == after_umount_blk && - be32_to_cpu(rhead->h_num_logops) == 1) { - umount_data_blk = rhead_blk + hblks; - umount_data_blk = do_mod(umount_data_blk, log->l_logBBsize); - error = xlog_bread(log, umount_data_blk, 1, bp, &offset); + error = xlog_verify_head(log, head_blk, tail_blk, bp, + &rhead_blk, &rhead, &wrapped); if (error) goto done; - op_head = (xlog_op_header_t *)offset; - if (op_head->oh_flags & XLOG_UNMOUNT_TRANS) { - /* - * Set tail and last sync so that newly written - * log records will point recovery to after the - * current unmount record. - */ - xlog_assign_atomic_lsn(&log->l_tail_lsn, - log->l_curr_cycle, after_umount_blk); - xlog_assign_atomic_lsn(&log->l_last_sync_lsn, - log->l_curr_cycle, after_umount_blk); - *tail_blk = after_umount_blk; - - /* - * Note that the unmount was clean. If the unmount - * was not clean, we need to know this to rebuild the - * superblock counters from the perag headers if we - * have a filesystem using non-persistent counters. - */ - log->l_mp->m_flags |= XFS_MOUNT_WAS_CLEAN; + /* update in-core state again if the head changed */ + if (*head_blk != orig_head) { + xlog_set_state(log, *head_blk, rhead, rhead_blk, + wrapped); + tail_lsn = atomic64_read(&log->l_tail_lsn); + error = xlog_check_unmount_rec(log, head_blk, tail_blk, + rhead, rhead_blk, bp, + &clean); + if (error) + goto done; } } /* + * Note that the unmount was clean. If the unmount was not clean, we + * need to know this to rebuild the superblock counters from the perag + * headers if we have a filesystem using non-persistent counters. + */ + if (clean) + log->l_mp->m_flags |= XFS_MOUNT_WAS_CLEAN; + + /* * Make sure that there are no blocks in front of the head * with the same cycle number as the head. This can happen * because we allow multiple outstanding log writes concurrently, |