Commit 42c24544 authored Jan 13, 2009 by Steve French

[CIFS] revalidate parent inode when rmdir done within that directory



When a search is pending of a parent directory, and a child directory
within it is removed, we need to reset the parent directory's time
so that we don't reuse the (now stale) search results.

Thanks to Gunter Kukkukk for reporting this:

> got the following failure notification on irc #samba:
>
> A user was updating from subversion 1.4 to 1.5, where the
> repository is located on a samba share (independent of
> unix extensions = Yes or No).
> svn 1.4 did work, 1.5 does not.
>
> The user did a lot of stracing of subversion - and wrote a
> testapplet to simulate the failing behaviour.
> I've converted the C++ source to C and added some error cases.
>
> When using "./testdir" on a local file system, "result2"
> is always (nil) as expected - cifs vfs behaves different here!
>
>   ./testdir /mnt/cifs/mounted/share
>
> returns a (failing) valid pointer.

Acked-by: Dave Kleikamp <shaggy@us.ibm.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

parent 6a7f8d36

fs/cifs/CHANGES

+3 −1

Original line number	Diff line number	Diff line
		@@ -5,7 +5,9 @@ rather than posix (advisory) byte range locks, even though server would
		support posix byte range locks. Fix query of root inode when prefixpath
		specified and user does not have access to query information about the
		top of the share. Fix problem in 2.6.28 resolving DFS paths to
		Samba servers (worked to Windows).
		Samba servers (worked to Windows). Fix rmdir so that pending search
		(readdir) requests do not get invalid results which include the now
		removed directory.

		Version 1.55
		------------

fs/cifs/inode.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1285,6 +1285,11 @@ int cifs_rmdir(struct inode inode, struct dentry direntry)
		cifsInode = CIFS_I(direntry->d_inode);
		cifsInode->time = 0; /* force revalidate to go get info when
		needed */

		cifsInode = CIFS_I(inode);
		cifsInode->time = 0; /* force revalidate to get parent dir info
		since cached search results now invalid */

		direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
		current_fs_time(inode->i_sb);