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ext4: Remove ext4 locking of moved directory 

commit 3658840cd3 upstream.

Remove locking of moved directory in ext4_rename2(). We will take care
of it in VFS instead. This effectively reverts commit 0813299c58
("ext4: Fix possible corruption when moving a directory") and followup
fixes.

CC: Ted Tso <tytso@mit.edu>
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230601105830.13168-1-jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jan Kara 2023-06-01 12:58:21 +02:00 committed by Greg Kroah-Hartman
parent 606e463eef
commit 6aaa22ec73
1 changed files with 2 additions and 15 deletions
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17
fs/ext4/namei.c
View File

@ -3834,19 +3834,10 @@ static int ext4_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
return retval;
}
/*
* We need to protect against old.inode directory getting converted
* from inline directory format into a normal one.
*/
if (S_ISDIR(old.inode->i_mode))
inode_lock_nested(old.inode, I_MUTEX_NONDIR2);
old.bh = ext4_find_entry(old.dir, &old.dentry->d_name, &old.de,
&old.inlined);
if (IS_ERR(old.bh)) {
retval = PTR_ERR(old.bh);
goto unlock_moved_dir;
}
if (IS_ERR(old.bh))
return PTR_ERR(old.bh);
/*
* Check for inode number is _not_ due to possible IO errors.
@ -4043,10 +4034,6 @@ static int ext4_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
brelse(old.bh);
brelse(new.bh);
unlock_moved_dir:
if (S_ISDIR(old.inode->i_mode))
inode_unlock(old.inode);
return retval;
}