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authorAl Viro <viro@zeniv.linux.org.uk>2012-02-06 12:45:27 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2012-03-20 21:29:32 -0400
commit8de52778798fe39660a8d6b26f290e0c93202761 (patch)
tree56384beb7863c1f338f2b66b509bf58eea5a99c2 /fs/jfs
parentc16fa4f2ad19908a47c63d8fa436a1178438c7e7 (diff)
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/jfs')
-rw-r--r--fs/jfs/namei.c13
-rw-r--r--fs/jfs/super.c1
2 files changed, 1 insertions, 13 deletions
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 5f7c160ea64..07c91ca6017 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -220,12 +220,6 @@ static int jfs_mkdir(struct inode *dip, struct dentry *dentry, umode_t mode)
dquot_initialize(dip);
- /* link count overflow on parent directory ? */
- if (dip->i_nlink == JFS_LINK_MAX) {
- rc = -EMLINK;
- goto out1;
- }
-
/*
* search parent directory for entry/freespace
* (dtSearch() returns parent directory page pinned)
@@ -806,9 +800,6 @@ static int jfs_link(struct dentry *old_dentry,
jfs_info("jfs_link: %s %s", old_dentry->d_name.name,
dentry->d_name.name);
- if (ip->i_nlink == JFS_LINK_MAX)
- return -EMLINK;
-
dquot_initialize(dir);
tid = txBegin(ip->i_sb, 0);
@@ -1138,10 +1129,6 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
rc = -ENOTEMPTY;
goto out3;
}
- } else if ((new_dir != old_dir) &&
- (new_dir->i_nlink == JFS_LINK_MAX)) {
- rc = -EMLINK;
- goto out3;
}
} else if (new_ip) {
IWRITE_LOCK(new_ip, RDWRLOCK_NORMAL);
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 682bca642f3..4661ad70513 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -441,6 +441,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
return -ENOMEM;
sb->s_fs_info = sbi;
+ sb->s_max_links = JFS_LINK_MAX;
sbi->sb = sb;
sbi->uid = sbi->gid = sbi->umask = -1;