From: Paulo Alcantara <pc@cjr.nz>
Date: Thu, 25 Feb 2021 14:16:15 -0300
Subject: [PATCH] cifs: fix nodfs mount option
Git-commit: d01132ae50207bb6fd94e08e80c2d7b839408086
References: bsc#1181710
Patch-mainline: v5.12-rc1
Skip DFS resolving when mounting with 'nodfs' even if
CONFIG_CIFS_DFS_UPCALL is enabled.
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Cc: stable@vger.kernel.org # 5.11
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Paulo Alcantara <palcantara@suse.de>
---
fs/cifs/connect.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 9ecd8098c2b6..afb0154e8cb0 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3379,15 +3379,15 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
rc = mount_get_conns(ctx, cifs_sb, &xid, &server, &ses, &tcon);
/*
- * Unconditionally try to get an DFS referral (even cached) to determine whether it is an
- * DFS mount.
+ * If called with 'nodfs' mount option, then skip DFS resolving. Otherwise unconditionally
+ * try to get an DFS referral (even cached) to determine whether it is an DFS mount.
*
* Skip prefix path to provide support for DFS referrals from w2k8 servers which don't seem
* to respond with PATH_NOT_COVERED to requests that include the prefix.
*/
- if (dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb), ctx->UNC + 1, NULL,
+ if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) ||
+ dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb), ctx->UNC + 1, NULL,
NULL)) {
- /* No DFS referral was returned. Looks like a regular share. */
if (rc)
goto error;
/* Check if it is fully accessible and then mount it */
--
2.33.1