From 374402a2a1dfbbee8ab1a5a32ec4887bf8c15d52 Mon Sep 17 00:00:00 2001 From: Sachin Prabhu Date: Thu, 15 Dec 2016 12:31:19 +0530 Subject: 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 Reported-by: Pierguido Lambri Reviewed-by: Jeff Layton Signed-off-by: Steve French --- fs/cifs/cifsfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/cifs/cifsfs.c') diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 15261ba464c5..f135f088cdff 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -615,7 +615,7 @@ cifs_get_root(struct smb_vol *vol, struct super_block *sb) return dget(sb->s_root); full_path = cifs_build_path_to_root(vol, cifs_sb, - cifs_sb_master_tcon(cifs_sb)); + cifs_sb_master_tcon(cifs_sb), 0); if (full_path == NULL) return ERR_PTR(-ENOMEM); -- cgit v1.2.3-59-g8ed1b