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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2011-01-29 18:43:30 +0530
committerAl Viro <viro@zeniv.linux.org.uk>2011-03-15 02:21:44 -0400
commitf17b6042073e7000a90063f7edbca59a5bd1caa2 (patch)
treee893485df882c770da602030c6c1098b11ea3d56
parentaae8a97d3ec30788790d1720b71d76fd8eb44b73 (diff)
fs: Remove i_nlink check from file system link callback
Now that VFS check for inode->i_nlink == 0 and returns proper error, remove similar check from file system Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/btrfs/inode.c3
-rw-r--r--fs/ext3/namei.c7
-rw-r--r--fs/ext4/namei.c7
-rw-r--r--fs/jfs/namei.c3
-rw-r--r--fs/reiserfs/namei.c4
-rw-r--r--fs/ubifs/dir.c18
6 files changed, 0 insertions, 42 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 0efdb65953c..c23f050f47c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4806,9 +4806,6 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
int err;
int drop_inode = 0;
- if (inode->i_nlink == 0)
- return -ENOENT;
-
/* do not allow sys_link's with other subvols of the same device */
if (root->objectid != BTRFS_I(inode)->root->objectid)
return -EPERM;
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index b27ba71810e..561f6925626 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -2253,13 +2253,6 @@ static int ext3_link (struct dentry * old_dentry,
dquot_initialize(dir);
- /*
- * Return -ENOENT if we've raced with unlink and i_nlink is 0. Doing
- * otherwise has the potential to corrupt the orphan inode list.
- */
- if (inode->i_nlink == 0)
- return -ENOENT;
-
retry:
handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT3_INDEX_EXTRA_TRANS_BLOCKS);
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 5485390d32c..e781b7ea563 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2304,13 +2304,6 @@ static int ext4_link(struct dentry *old_dentry,
dquot_initialize(dir);
- /*
- * Return -ENOENT if we've raced with unlink and i_nlink is 0. Doing
- * otherwise has the potential to corrupt the orphan inode list.
- */
- if (inode->i_nlink == 0)
- return -ENOENT;
-
retry:
handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS);
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 5a2b269428a..3f04a180493 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -809,9 +809,6 @@ static int jfs_link(struct dentry *old_dentry,
if (ip->i_nlink == JFS_LINK_MAX)
return -EMLINK;
- if (ip->i_nlink == 0)
- return -ENOENT;
-
dquot_initialize(dir);
tid = txBegin(ip->i_sb, 0);
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index 68fdf45cc6c..4b2eb564fda 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -1122,10 +1122,6 @@ static int reiserfs_link(struct dentry *old_dentry, struct inode *dir,
reiserfs_write_unlock(dir->i_sb);
return -EMLINK;
}
- if (inode->i_nlink == 0) {
- reiserfs_write_unlock(dir->i_sb);
- return -ENOENT;
- }
/* inc before scheduling so reiserfs_unlink knows we are here */
inc_nlink(inode);
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 14f64b689d7..7217d67a80a 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -522,24 +522,6 @@ static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
ubifs_assert(mutex_is_locked(&dir->i_mutex));
ubifs_assert(mutex_is_locked(&inode->i_mutex));
- /*
- * Return -ENOENT if we've raced with unlink and i_nlink is 0. Doing
- * otherwise has the potential to corrupt the orphan inode list.
- *
- * Indeed, consider a scenario when 'vfs_link(dirA/fileA)' and
- * 'vfs_unlink(dirA/fileA, dirB/fileB)' race. 'vfs_link()' does not
- * lock 'dirA->i_mutex', so this is possible. Both of the functions
- * lock 'fileA->i_mutex' though. Suppose 'vfs_unlink()' wins, and takes
- * 'fileA->i_mutex' mutex first. Suppose 'fileA->i_nlink' is 1. In this
- * case 'ubifs_unlink()' will drop the last reference, and put 'inodeA'
- * to the list of orphans. After this, 'vfs_link()' will link
- * 'dirB/fileB' to 'inodeA'. This is a problem because, for example,
- * the subsequent 'vfs_unlink(dirB/fileB)' will add the same inode
- * to the list of orphans.
- */
- if (inode->i_nlink == 0)
- return -ENOENT;
-
err = dbg_check_synced_i_size(inode);
if (err)
return err;