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author | David Teigland <teigland@redhat.com> | 2006-01-16 16:50:04 (GMT) |
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committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-01-16 16:50:04 (GMT) |
commit | b3b94faa5fe5968827ba0640ee9fba4b3e7f736e (patch) | |
tree | 70bd6068b050d2c46e338484f8b03fae4365c6c3 /fs/gfs2/ops_super.c | |
parent | f7825dcf8c7301cfd3724eb40c5b443cc85ab7b8 (diff) | |
download | linux-fsl-qoriq-b3b94faa5fe5968827ba0640ee9fba4b3e7f736e.tar.xz |
[GFS2] The core of GFS2
This patch contains all the core files for GFS2.
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/ops_super.c')
-rw-r--r-- | fs/gfs2/ops_super.c | 401 |
1 files changed, 401 insertions, 0 deletions
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c new file mode 100644 index 0000000..ca6a4d8 --- /dev/null +++ b/fs/gfs2/ops_super.c @@ -0,0 +1,401 @@ +/* + * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. + * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. + * + * This copyrighted material is made available to anyone wishing to use, + * modify, copy, or redistribute it subject to the terms and conditions + * of the GNU General Public License v.2. + */ + +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/completion.h> +#include <linux/buffer_head.h> +#include <linux/vmalloc.h> +#include <linux/statfs.h> +#include <linux/seq_file.h> +#include <linux/mount.h> +#include <linux/kthread.h> +#include <linux/delay.h> +#include <asm/semaphore.h> + +#include "gfs2.h" +#include "glock.h" +#include "inode.h" +#include "lm.h" +#include "log.h" +#include "mount.h" +#include "ops_super.h" +#include "page.h" +#include "quota.h" +#include "recovery.h" +#include "rgrp.h" +#include "super.h" +#include "sys.h" + +/** + * gfs2_write_inode - Make sure the inode is stable on the disk + * @inode: The inode + * @sync: synchronous write flag + * + * Returns: errno + */ + +static int gfs2_write_inode(struct inode *inode, int sync) +{ + struct gfs2_inode *ip = get_v2ip(inode); + + atomic_inc(&ip->i_sbd->sd_ops_super); + + if (current->flags & PF_MEMALLOC) + return 0; + if (ip && sync) + gfs2_log_flush_glock(ip->i_gl); + + return 0; +} + +/** + * gfs2_put_super - Unmount the filesystem + * @sb: The VFS superblock + * + */ + +static void gfs2_put_super(struct super_block *sb) +{ + struct gfs2_sbd *sdp = get_v2sdp(sb); + int error; + + if (!sdp) + return; + + atomic_inc(&sdp->sd_ops_super); + + /* Unfreeze the filesystem, if we need to */ + + down(&sdp->sd_freeze_lock); + if (sdp->sd_freeze_count) + gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); + up(&sdp->sd_freeze_lock); + + kthread_stop(sdp->sd_inoded_process); + kthread_stop(sdp->sd_quotad_process); + kthread_stop(sdp->sd_logd_process); + kthread_stop(sdp->sd_recoverd_process); + while (sdp->sd_glockd_num--) + kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]); + kthread_stop(sdp->sd_scand_process); + + if (!(sb->s_flags & MS_RDONLY)) { + error = gfs2_make_fs_ro(sdp); + if (error) + gfs2_io_error(sdp); + } + + /* At this point, we're through modifying the disk */ + + /* Release stuff */ + + gfs2_inode_put(sdp->sd_master_dir); + gfs2_inode_put(sdp->sd_jindex); + gfs2_inode_put(sdp->sd_inum_inode); + gfs2_inode_put(sdp->sd_statfs_inode); + gfs2_inode_put(sdp->sd_rindex); + gfs2_inode_put(sdp->sd_quota_inode); + gfs2_inode_put(sdp->sd_root_dir); + + gfs2_glock_put(sdp->sd_rename_gl); + gfs2_glock_put(sdp->sd_trans_gl); + + if (!sdp->sd_args.ar_spectator) { + gfs2_glock_dq_uninit(&sdp->sd_journal_gh); + gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); + gfs2_glock_dq_uninit(&sdp->sd_ir_gh); + gfs2_glock_dq_uninit(&sdp->sd_sc_gh); + gfs2_glock_dq_uninit(&sdp->sd_ut_gh); + gfs2_glock_dq_uninit(&sdp->sd_qc_gh); + gfs2_inode_put(sdp->sd_ir_inode); + gfs2_inode_put(sdp->sd_sc_inode); + gfs2_inode_put(sdp->sd_ut_inode); + gfs2_inode_put(sdp->sd_qc_inode); + } + + gfs2_glock_dq_uninit(&sdp->sd_live_gh); + + gfs2_clear_rgrpd(sdp); + gfs2_jindex_free(sdp); + + /* Take apart glock structures and buffer lists */ + gfs2_gl_hash_clear(sdp, WAIT); + + /* Unmount the locking protocol */ + gfs2_lm_unmount(sdp); + + /* At this point, we're through participating in the lockspace */ + + gfs2_sys_fs_del(sdp); + + /* Get rid of any extra inodes */ + while (invalidate_inodes(sb)) + yield(); + + vfree(sdp); + + set_v2sdp(sb, NULL); +} + +/** + * gfs2_write_super - disk commit all incore transactions + * @sb: the filesystem + * + * This function is called every time sync(2) is called. + * After this exits, all dirty buffers and synced. + */ + +static void gfs2_write_super(struct super_block *sb) +{ + struct gfs2_sbd *sdp = get_v2sdp(sb); + atomic_inc(&sdp->sd_ops_super); + gfs2_log_flush(sdp); +} + +/** + * gfs2_write_super_lockfs - prevent further writes to the filesystem + * @sb: the VFS structure for the filesystem + * + */ + +static void gfs2_write_super_lockfs(struct super_block *sb) +{ + struct gfs2_sbd *sdp = get_v2sdp(sb); + int error; + + atomic_inc(&sdp->sd_ops_super); + + for (;;) { + error = gfs2_freeze_fs(sdp); + if (!error) + break; + + switch (error) { + case -EBUSY: + fs_err(sdp, "waiting for recovery before freeze\n"); + break; + + default: + fs_err(sdp, "error freezing FS: %d\n", error); + break; + } + + fs_err(sdp, "retrying...\n"); + msleep(1000); + } +} + +/** + * gfs2_unlockfs - reallow writes to the filesystem + * @sb: the VFS structure for the filesystem + * + */ + +static void gfs2_unlockfs(struct super_block *sb) +{ + struct gfs2_sbd *sdp = get_v2sdp(sb); + + atomic_inc(&sdp->sd_ops_super); + gfs2_unfreeze_fs(sdp); +} + +/** + * gfs2_statfs - Gather and return stats about the filesystem + * @sb: The superblock + * @statfsbuf: The buffer + * + * Returns: 0 on success or error code + */ + +static int gfs2_statfs(struct super_block *sb, struct kstatfs *buf) +{ + struct gfs2_sbd *sdp = get_v2sdp(sb); + struct gfs2_statfs_change sc; + int error; + + atomic_inc(&sdp->sd_ops_super); + + if (gfs2_tune_get(sdp, gt_statfs_slow)) + error = gfs2_statfs_slow(sdp, &sc); + else + error = gfs2_statfs_i(sdp, &sc); + + if (error) + return error; + + memset(buf, 0, sizeof(struct kstatfs)); + + buf->f_type = GFS2_MAGIC; + buf->f_bsize = sdp->sd_sb.sb_bsize; + buf->f_blocks = sc.sc_total; + buf->f_bfree = sc.sc_free; + buf->f_bavail = sc.sc_free; + buf->f_files = sc.sc_dinodes + sc.sc_free; + buf->f_ffree = sc.sc_free; + buf->f_namelen = GFS2_FNAMESIZE; + + return 0; +} + +/** + * gfs2_remount_fs - called when the FS is remounted + * @sb: the filesystem + * @flags: the remount flags + * @data: extra data passed in (not used right now) + * + * Returns: errno + */ + +static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) +{ + struct gfs2_sbd *sdp = get_v2sdp(sb); + int error; + + atomic_inc(&sdp->sd_ops_super); + + error = gfs2_mount_args(sdp, data, 1); + if (error) + return error; + + if (sdp->sd_args.ar_spectator) + *flags |= MS_RDONLY; + else { + if (*flags & MS_RDONLY) { + if (!(sb->s_flags & MS_RDONLY)) + error = gfs2_make_fs_ro(sdp); + } else if (!(*flags & MS_RDONLY) && + (sb->s_flags & MS_RDONLY)) { + error = gfs2_make_fs_rw(sdp); + } + } + + if (*flags & (MS_NOATIME | MS_NODIRATIME)) + set_bit(SDF_NOATIME, &sdp->sd_flags); + else + clear_bit(SDF_NOATIME, &sdp->sd_flags); + + /* Don't let the VFS update atimes. GFS2 handles this itself. */ + *flags |= MS_NOATIME | MS_NODIRATIME; + + return error; +} + +/** + * gfs2_clear_inode - Deallocate an inode when VFS is done with it + * @inode: The VFS inode + * + */ + +static void gfs2_clear_inode(struct inode *inode) +{ + struct gfs2_inode *ip = get_v2ip(inode); + + atomic_inc(&get_v2sdp(inode->i_sb)->sd_ops_super); + + if (ip) { + spin_lock(&ip->i_spin); + ip->i_vnode = NULL; + set_v2ip(inode, NULL); + spin_unlock(&ip->i_spin); + + gfs2_glock_schedule_for_reclaim(ip->i_gl); + gfs2_inode_put(ip); + } +} + +/** + * gfs2_show_options - Show mount options for /proc/mounts + * @s: seq_file structure + * @mnt: vfsmount + * + * Returns: 0 on success or error code + */ + +static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) +{ + struct gfs2_sbd *sdp = get_v2sdp(mnt->mnt_sb); + struct gfs2_args *args = &sdp->sd_args; + + atomic_inc(&sdp->sd_ops_super); + + if (args->ar_lockproto[0]) + seq_printf(s, ",lockproto=%s", args->ar_lockproto); + if (args->ar_locktable[0]) + seq_printf(s, ",locktable=%s", args->ar_locktable); + if (args->ar_hostdata[0]) + seq_printf(s, ",hostdata=%s", args->ar_hostdata); + if (args->ar_spectator) + seq_printf(s, ",spectator"); + if (args->ar_ignore_local_fs) + seq_printf(s, ",ignore_local_fs"); + if (args->ar_localflocks) + seq_printf(s, ",localflocks"); + if (args->ar_localcaching) + seq_printf(s, ",localcaching"); + if (args->ar_debug) + seq_printf(s, ",debug"); + if (args->ar_upgrade) + seq_printf(s, ",upgrade"); + if (args->ar_num_glockd != GFS2_GLOCKD_DEFAULT) + seq_printf(s, ",num_glockd=%u", args->ar_num_glockd); + if (args->ar_posix_acl) + seq_printf(s, ",acl"); + if (args->ar_quota != GFS2_QUOTA_DEFAULT) { + char *state; + switch (args->ar_quota) { + case GFS2_QUOTA_OFF: + state = "off"; + break; + case GFS2_QUOTA_ACCOUNT: + state = "account"; + break; + case GFS2_QUOTA_ON: + state = "on"; + break; + default: + state = "unknown"; + break; + } + seq_printf(s, ",quota=%s", state); + } + if (args->ar_suiddir) + seq_printf(s, ",suiddir"); + if (args->ar_data != GFS2_DATA_DEFAULT) { + char *state; + switch (args->ar_data) { + case GFS2_DATA_WRITEBACK: + state = "writeback"; + break; + case GFS2_DATA_ORDERED: + state = "ordered"; + break; + default: + state = "unknown"; + break; + } + seq_printf(s, ",data=%s", state); + } + + return 0; +} + +struct super_operations gfs2_super_ops = { + .write_inode = gfs2_write_inode, + .put_super = gfs2_put_super, + .write_super = gfs2_write_super, + .write_super_lockfs = gfs2_write_super_lockfs, + .unlockfs = gfs2_unlockfs, + .statfs = gfs2_statfs, + .remount_fs = gfs2_remount_fs, + .clear_inode = gfs2_clear_inode, + .show_options = gfs2_show_options, +}; + |