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| author |   Pavel Shilovsky <pshilovsky@samba.org> | 2014-08-22 13:32:09 +0400 |
|---|---|---|
| committer |   Steve French <smfrench@gmail.com> | 2014-08-22 00:26:56 -0500 |
| commit | a07d322059db66b84c9eb4f98959df468e88b34b (patch) | |
| tree | cc83068b580a6b2a518679080480d7814140eb75 /fs/cifs/inode.c | |
| parent | cifs: No need to send SIGKILL to demux_thread during umount (diff) | |
| download | linux-dev-a07d322059db66b84c9eb4f98959df468e88b34b.tar.xz linux-dev-a07d322059db66b84c9eb4f98959df468e88b34b.zip | |
CIFS: Fix directory rename error
CIFS servers process nlink counts differently for files and directories.
In cifs_rename() if we the request fails on the existing target, we
try to remove it through cifs_unlink() but this is not what we want
to do for directories. As the result the following sequence of commands
mkdir {1,2}; mv -T 1 2; rmdir {1,2}; mkdir {1,2}; echo foo > 2/bar
and XFS test generic/023 fail with -ENOENT error. That's why the second
mkdir reuses the existing inode (target inode of the mv -T command) with
S_DEAD flag.
Fix this by checking whether the target is directory or not and
calling cifs_rmdir() rather than cifs_unlink() for directories.
Cc: <stable@vger.kernel.org>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/inode.c')
| -rw-r--r-- | fs/cifs/inode.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 949ec909ec9a..7899a40465b3 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -1720,7 +1720,10 @@ cifs_rename2(struct inode *source_dir, struct dentry *source_dentry, unlink_target: /* Try unlinking the target dentry if it's not negative */ if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) { - tmprc = cifs_unlink(target_dir, target_dentry); + if (d_is_dir(target_dentry)) + tmprc = cifs_rmdir(target_dir, target_dentry); + else + tmprc = cifs_unlink(target_dir, target_dentry); if (tmprc) goto cifs_rename_exit; rc = cifs_do_rename(xid, source_dentry, from_name, |