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authorSachin Prabhu <sprabhu@redhat.com>2016-12-15 12:31:19 +0530
committerSteve French <smfrench@gmail.com>2016-12-15 01:42:54 -0600
commit374402a2a1dfbbee8ab1a5a32ec4887bf8c15d52 (patch)
treee886fc71908f5e2ac4c97b68e30e7b364417cfb2 /fs/cifs/connect.c
parent395664439c4945e4827543e3ca80f7b74e1bf733 (diff)
cifs_get_root shouldn't use path with tree name
When a server returns the optional flag SMB_SHARE_IS_IN_DFS in response to a tree connect, cifs_build_path_to_root() will return a pathname which includes the hostname. This causes problems with cifs_get_root() which separates each component and does a lookup for each component of the path which in this case will incorrectly include looking up the hostname component as a path component. We encountered a problem with dfs shares hosted by a Netapp. When connecting to nodes pointed to by the DFS share. The tree connect for these nodes return SMB_SHARE_IS_IN_DFS resulting failures in lookup in cifs_get_root(). RH bz: 1373153 The patch was tested against a Netapp simulator and by a user using an actual Netapp server. Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Reported-by: Pierguido Lambri <plambri@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/connect.c')
-rw-r--r--fs/cifs/connect.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 1847aa8390ff..851256e99cf0 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3765,7 +3765,8 @@ remote_path_check:
/*
* cifs_build_path_to_root works only when we have a valid tcon
*/
- full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
+ full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon,
+ tcon->Flags & SMB_SHARE_IS_IN_DFS);
if (full_path == NULL) {
rc = -ENOMEM;
goto mount_fail_check;