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author | Paul Mundt <lethal@linux-sh.org> | 2011-03-17 07:44:08 (GMT) |
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committer | Paul Mundt <lethal@linux-sh.org> | 2011-03-17 07:44:08 (GMT) |
commit | 1d2a1959fe534279cf37aba20b08c24c20840e52 (patch) | |
tree | 67c0b9aa7fe22a44bf0b4af88947799203eb8f67 /drivers/staging/autofs/inode.c | |
parent | 5a79ce76e9bb8f4b2cd8106ee36d15ee05013bcf (diff) | |
parent | 054cfaacf88865bff1dd58d305443d5d6c068a08 (diff) | |
download | linux-1d2a1959fe534279cf37aba20b08c24c20840e52.tar.xz |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into sh-latest
Diffstat (limited to 'drivers/staging/autofs/inode.c')
-rw-r--r-- | drivers/staging/autofs/inode.c | 288 |
1 files changed, 0 insertions, 288 deletions
diff --git a/drivers/staging/autofs/inode.c b/drivers/staging/autofs/inode.c deleted file mode 100644 index 74db190..0000000 --- a/drivers/staging/autofs/inode.c +++ /dev/null @@ -1,288 +0,0 @@ -/* -*- linux-c -*- --------------------------------------------------------- * - * - * drivers/staging/autofs/inode.c - * - * 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/kernel.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/file.h> -#include <linux/parser.h> -#include <linux/bitops.h> -#include <linux/magic.h> -#include "autofs_i.h" -#include <linux/module.h> - -void autofs_kill_sb(struct super_block *sb) -{ - struct autofs_sb_info *sbi = autofs_sbi(sb); - unsigned int n; - - /* - * In the event of a failure in get_sb_nodev the superblock - * info is not present so nothing else has been setup, so - * just call kill_anon_super when we are called from - * deactivate_super. - */ - if (!sbi) - goto out_kill_sb; - - if (!sbi->catatonic) - autofs_catatonic_mode(sbi); /* Free wait queues, close pipe */ - - put_pid(sbi->oz_pgrp); - - autofs_hash_nuke(sbi); - for (n = 0; n < AUTOFS_MAX_SYMLINKS; n++) { - if (test_bit(n, sbi->symlink_bitmap)) - kfree(sbi->symlink[n].data); - } - - kfree(sb->s_fs_info); - -out_kill_sb: - DPRINTK(("autofs: shutting down\n")); - kill_anon_super(sb); -} - -static const struct super_operations autofs_sops = { - .statfs = simple_statfs, - .show_options = generic_show_options, -}; - -enum {Opt_err, Opt_fd, Opt_uid, Opt_gid, Opt_pgrp, Opt_minproto, Opt_maxproto}; - -static const match_table_t autofs_tokens = { - {Opt_fd, "fd=%u"}, - {Opt_uid, "uid=%u"}, - {Opt_gid, "gid=%u"}, - {Opt_pgrp, "pgrp=%u"}, - {Opt_minproto, "minproto=%u"}, - {Opt_maxproto, "maxproto=%u"}, - {Opt_err, NULL} -}; - -static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid, - pid_t *pgrp, int *minproto, int *maxproto) -{ - char *p; - substring_t args[MAX_OPT_ARGS]; - int option; - - *uid = current_uid(); - *gid = current_gid(); - *pgrp = task_pgrp_nr(current); - - *minproto = *maxproto = AUTOFS_PROTO_VERSION; - - *pipefd = -1; - - if (!options) - return 1; - - while ((p = strsep(&options, ",")) != NULL) { - int token; - if (!*p) - continue; - - token = match_token(p, autofs_tokens, args); - switch (token) { - case Opt_fd: - if (match_int(&args[0], &option)) - return 1; - *pipefd = option; - break; - case Opt_uid: - if (match_int(&args[0], &option)) - return 1; - *uid = option; - break; - case Opt_gid: - if (match_int(&args[0], &option)) - return 1; - *gid = option; - break; - case Opt_pgrp: - if (match_int(&args[0], &option)) - return 1; - *pgrp = option; - break; - case Opt_minproto: - if (match_int(&args[0], &option)) - return 1; - *minproto = option; - break; - case Opt_maxproto: - if (match_int(&args[0], &option)) - return 1; - *maxproto = option; - break; - default: - return 1; - } - } - return (*pipefd < 0); -} - -int autofs_fill_super(struct super_block *s, void *data, int silent) -{ - struct inode * root_inode; - struct dentry * root; - struct file * pipe; - int pipefd; - struct autofs_sb_info *sbi; - int minproto, maxproto; - pid_t pgid; - - save_mount_options(s, data); - - sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); - if (!sbi) - goto fail_unlock; - DPRINTK(("autofs: starting up, sbi = %p\n",sbi)); - - s->s_fs_info = sbi; - sbi->magic = AUTOFS_SBI_MAGIC; - sbi->pipe = NULL; - sbi->catatonic = 1; - sbi->exp_timeout = 0; - autofs_initialize_hash(&sbi->dirhash); - sbi->queues = NULL; - memset(sbi->symlink_bitmap, 0, sizeof(long)*AUTOFS_SYMLINK_BITMAP_LEN); - sbi->next_dir_ino = AUTOFS_FIRST_DIR_INO; - s->s_blocksize = 1024; - s->s_blocksize_bits = 10; - s->s_magic = AUTOFS_SUPER_MAGIC; - s->s_op = &autofs_sops; - s->s_time_gran = 1; - sbi->sb = s; - - root_inode = autofs_iget(s, AUTOFS_ROOT_INO); - if (IS_ERR(root_inode)) - goto fail_free; - root = d_alloc_root(root_inode); - pipe = NULL; - - if (!root) - goto fail_iput; - - /* Can this call block? - WTF cares? s is locked. */ - if (parse_options(data, &pipefd, &root_inode->i_uid, - &root_inode->i_gid, &pgid, &minproto, - &maxproto)) { - printk("autofs: called with bogus options\n"); - goto fail_dput; - } - - /* Couldn't this be tested earlier? */ - if (minproto > AUTOFS_PROTO_VERSION || - maxproto < AUTOFS_PROTO_VERSION) { - printk("autofs: kernel does not match daemon version\n"); - goto fail_dput; - } - - DPRINTK(("autofs: pipe fd = %d, pgrp = %u\n", pipefd, pgid)); - sbi->oz_pgrp = find_get_pid(pgid); - - if (!sbi->oz_pgrp) { - printk("autofs: could not find process group %d\n", pgid); - goto fail_dput; - } - - pipe = fget(pipefd); - - if (!pipe) { - printk("autofs: could not open pipe file descriptor\n"); - goto fail_put_pid; - } - - if (!pipe->f_op || !pipe->f_op->write) - goto fail_fput; - sbi->pipe = pipe; - sbi->catatonic = 0; - - /* - * Success! Install the root dentry now to indicate completion. - */ - s->s_root = root; - return 0; - -fail_fput: - printk("autofs: pipe file descriptor does not contain proper ops\n"); - fput(pipe); -fail_put_pid: - put_pid(sbi->oz_pgrp); -fail_dput: - dput(root); - goto fail_free; -fail_iput: - printk("autofs: get root dentry failed\n"); - iput(root_inode); -fail_free: - kfree(sbi); - s->s_fs_info = NULL; -fail_unlock: - return -EINVAL; -} - -struct inode *autofs_iget(struct super_block *sb, unsigned long ino) -{ - unsigned int n; - struct autofs_sb_info *sbi = autofs_sbi(sb); - struct inode *inode; - - inode = iget_locked(sb, ino); - if (!inode) - return ERR_PTR(-ENOMEM); - if (!(inode->i_state & I_NEW)) - return inode; - - /* Initialize to the default case (stub directory) */ - - inode->i_op = &simple_dir_inode_operations; - inode->i_fop = &simple_dir_operations; - inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; - inode->i_nlink = 2; - inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; - - if (ino == AUTOFS_ROOT_INO) { - inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO | S_IWUSR; - inode->i_op = &autofs_root_inode_operations; - inode->i_fop = &autofs_root_operations; - goto done; - } - - inode->i_uid = inode->i_sb->s_root->d_inode->i_uid; - inode->i_gid = inode->i_sb->s_root->d_inode->i_gid; - - if (ino >= AUTOFS_FIRST_SYMLINK && ino < AUTOFS_FIRST_DIR_INO) { - /* Symlink inode - should be in symlink list */ - struct autofs_symlink *sl; - - n = ino - AUTOFS_FIRST_SYMLINK; - if (n >= AUTOFS_MAX_SYMLINKS || !test_bit(n,sbi->symlink_bitmap)) { - printk("autofs: Looking for bad symlink inode %u\n", (unsigned int) ino); - goto done; - } - - inode->i_op = &autofs_symlink_inode_operations; - sl = &sbi->symlink[n]; - inode->i_private = sl; - inode->i_mode = S_IFLNK | S_IRWXUGO; - inode->i_mtime.tv_sec = inode->i_ctime.tv_sec = sl->mtime; - inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = 0; - inode->i_size = sl->len; - inode->i_nlink = 1; - } - -done: - unlock_new_inode(inode); - return inode; -} |