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/cifsproto.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/cifs/cifsproto.h') diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index cd8025a249bb..c7b3c841e660 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -63,7 +63,8 @@ extern void exit_cifs_spnego(void); extern char *build_path_from_dentry(struct dentry *); extern char *cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, - struct cifs_tcon *tcon); + struct cifs_tcon *tcon, + int add_treename); extern char *build_wildcard_path_from_dentry(struct dentry *direntry); extern char *cifs_compose_mount_options(const char *sb_mountdata, const char *fullpath, const struct dfs_info3_param *ref, -- cgit v1.2.3-55-g7522