From: Paulo Alcantara pc@cjr.nz
commit d01132ae50207bb6fd94e08e80c2d7b839408086 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/cifs/connect.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
--- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -3366,15 +3366,15 @@ int cifs_mount(struct cifs_sb_info *cifs
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 */