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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-02-06 18:45:27 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-03-21 02:29:32 +0100 |
| commit | 8de52778798fe39660a8d6b26f290e0c93202761 (patch) | |
| tree | 56384beb7863c1f338f2b66b509bf58eea5a99c2 /fs/ext2 | |
| parent | Linux 3.3 (diff) | |
| download | linux-8de52778798fe39660a8d6b26f290e0c93202761.tar.xz linux-8de52778798fe39660a8d6b26f290e0c93202761.zip | |
vfs: check i_nlink limits in vfs_{mkdir,rename_dir,link}
New field of struct super_block - ->s_max_links. Maximal allowed
value of ->i_nlink or 0; in the latter case all checks still need
to be done in ->link/->mkdir/->rename instances. Note that this
limit applies both to directoris and to non-directories.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ext2')
| -rw-r--r-- | fs/ext2/namei.c | 13 | ||||
| -rw-r--r-- | fs/ext2/super.c | 1 |
2 files changed, 2 insertions, 12 deletions
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c index 080419814bae..dffb86536285 100644 --- a/fs/ext2/namei.c +++ b/fs/ext2/namei.c @@ -195,9 +195,6 @@ static int ext2_link (struct dentry * old_dentry, struct inode * dir, struct inode *inode = old_dentry->d_inode; int err; - if (inode->i_nlink >= EXT2_LINK_MAX) - return -EMLINK; - dquot_initialize(dir); inode->i_ctime = CURRENT_TIME_SEC; @@ -217,10 +214,7 @@ static int ext2_link (struct dentry * old_dentry, struct inode * dir, static int ext2_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode) { struct inode * inode; - int err = -EMLINK; - - if (dir->i_nlink >= EXT2_LINK_MAX) - goto out; + int err; dquot_initialize(dir); @@ -346,11 +340,6 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry, drop_nlink(new_inode); inode_dec_link_count(new_inode); } else { - if (dir_de) { - err = -EMLINK; - if (new_dir->i_nlink >= EXT2_LINK_MAX) - goto out_dir; - } err = ext2_add_link(new_dentry, old_inode); if (err) goto out_dir; diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 0090595beb28..9f6766a3ac1e 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -919,6 +919,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) } sb->s_maxbytes = ext2_max_size(sb->s_blocksize_bits); + sb->s_max_links = EXT2_LINK_MAX; if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV) { sbi->s_inode_size = EXT2_GOOD_OLD_INODE_SIZE; |