cifs: always do is_path_accessible check in cifs_mount
authorJeff Layton <jlayton@redhat.com>
Mon, 14 Mar 2011 17:48:08 +0000 (13:48 -0400)
committerSteve French <sfrench@us.ibm.com>
Tue, 12 Apr 2011 00:52:08 +0000 (00:52 +0000)
commit70945643722ffeac779d2529a348f99567fa5c33
tree8dd3beff7efb653d6cff8836fbae686d472b5499
parent5443d130aa4990424a8e64984e64b50ec70661bb
cifs: always do is_path_accessible check in cifs_mount

Currently, we skip doing the is_path_accessible check in cifs_mount if
there is no prefixpath. I have a report of at least one server however
that allows a TREE_CONNECT to a share that has a DFS referral at its
root. The reporter in this case was using a UNC that had no prefixpath,
so the is_path_accessible check was not triggered and the box later hit
a BUG() because we were chasing a DFS referral on the root dentry for
the mount.

This patch fixes this by removing the check for a zero-length
prefixpath.  That should make the is_path_accessible check be done in
this situation and should allow the client to chase the DFS referral at
mount time instead.

Cc: stable@kernel.org
Reported-and-Tested-by: Yogesh Sharma <ysharma@cymer.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
fs/cifs/connect.c