4.9-stable patches

[thirdparty/kernel/stable-queue.git] / releases / 4.8.5 / fix-regression-which-breaks-dfs-mounting.patch

From d171356ff11ab1825e456dfb979755e01b3c54a1 Mon Sep 17 00:00:00 2001
From: Sachin Prabhu <sprabhu@redhat.com>
Date: Tue, 6 Sep 2016 13:22:34 +0100
Subject: Fix regression which breaks DFS mounting

From: Sachin Prabhu <sprabhu@redhat.com>

commit d171356ff11ab1825e456dfb979755e01b3c54a1 upstream.

Patch a6b5058 results in -EREMOTE returned by is_path_accessible() in
cifs_mount() to be ignored which breaks DFS mounting.

Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/cifs/connect.c |   14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3688,14 +3688,16 @@ remote_path_check:
 			goto mount_fail_check;
 		}
 
-		rc = cifs_are_all_path_components_accessible(server,
+		if (rc != -EREMOTE) {
+			rc = cifs_are_all_path_components_accessible(server,
 							     xid, tcon, cifs_sb,
 							     full_path);
-		if (rc != 0) {
-			cifs_dbg(VFS, "cannot query dirs between root and final path, "
-				 "enabling CIFS_MOUNT_USE_PREFIX_PATH\n");
-			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
-			rc = 0;
+			if (rc != 0) {
+				cifs_dbg(VFS, "cannot query dirs between root and final path, "
+					 "enabling CIFS_MOUNT_USE_PREFIX_PATH\n");
+				cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
+				rc = 0;
+			}
 		}
 		kfree(full_path);
 	}