cifs: do not query ifaces on smb1 mounts

commit 22aeb01db7080e18c6aeb4361cc2556c9887099a upstream.

Users have reported the following error on every 600 seconds
(SMB_INTERFACE_POLL_INTERVAL) when mounting SMB1 shares:

	CIFS: VFS: \\srv\share error -5 on ioctl to get interface list

It's supported only by SMB2+, so do not query network interfaces on
SMB1 mounts.

Fixes: 6e1c1c08cdf3 ("cifs: periodically query network interfaces from server")
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Tom Talpey <tom@talpey.com>
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 7e7f712..fde1c37 100644 (file)
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2609,11 +2609,14 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb3_fs_context *ctx)
        INIT_LIST_HEAD(&tcon->pending_opens);
        tcon->status = TID_GOOD;
 
-       /* schedule query interfaces poll */
        INIT_DELAYED_WORK(&tcon->query_interfaces,
                          smb2_query_server_interfaces);
-       queue_delayed_work(cifsiod_wq, &tcon->query_interfaces,
-                          (SMB_INTERFACE_POLL_INTERVAL * HZ));
+       if (ses->server->dialect >= SMB30_PROT_ID &&
+           (ses->server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) {
+               /* schedule query interfaces poll */
+               queue_delayed_work(cifsiod_wq, &tcon->query_interfaces,
+                                  (SMB_INTERFACE_POLL_INTERVAL * HZ));
+       }
 
        spin_lock(&cifs_tcp_ses_lock);
        list_add(&tcon->tcon_list, &ses->tcon_list);