From: Pavel Shilovsky Date: Fri, 22 Aug 2014 09:32:09 +0000 (+0400) Subject: CIFS: Fix directory rename error X-Git-Tag: v3.14.19~11 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=da432a625434d5f0ebce5d703dafe3bd0c8e8bd4;p=platform%2Fkernel%2Flinux-stable.git CIFS: Fix directory rename error commit a07d322059db66b84c9eb4f98959df468e88b34b upstream. 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. Signed-off-by: Pavel Shilovsky Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 74daead0d9df..f2ddcf7ac9c3 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -1706,7 +1706,10 @@ cifs_rename(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,