*
*/
static int __cifs_reconnect(struct TCP_Server_Info *server,
- bool mark_smb_session)
+ bool mark_smb_session, bool once)
{
int rc = 0;
if (rc) {
cifs_server_unlock(server);
cifs_dbg(FYI, "%s: reconnect error %d\n", __func__, rc);
+ /* If was asked to reconnect only once, do not try it more times */
+ if (once)
+ break;
msleep(3000);
} else {
atomic_inc(&tcpSesReconnectCount);
return rc;
}
-int cifs_reconnect(struct TCP_Server_Info *server, bool mark_smb_session)
+static int
+_cifs_reconnect(struct TCP_Server_Info *server, bool mark_smb_session, bool once)
{
if (!server->leaf_fullpath)
- return __cifs_reconnect(server, mark_smb_session);
+ return __cifs_reconnect(server, mark_smb_session, once);
return reconnect_dfs_server(server);
}
#else
-int cifs_reconnect(struct TCP_Server_Info *server, bool mark_smb_session)
+static int
+_cifs_reconnect(struct TCP_Server_Info *server, bool mark_smb_session, bool once)
{
- return __cifs_reconnect(server, mark_smb_session);
+ return __cifs_reconnect(server, mark_smb_session, once);
}
#endif
+int
+cifs_reconnect(struct TCP_Server_Info *server, bool mark_smb_session)
+{
+ return _cifs_reconnect(server, mark_smb_session, false);
+}
+
+static int
+cifs_reconnect_once(struct TCP_Server_Info *server)
+{
+ return _cifs_reconnect(server, true, true);
+}
+
static void
cifs_echo_request(struct work_struct *work)
{
/* Regular SMB response */
return true;
case RFC1002_SESSION_KEEP_ALIVE:
+ /*
+ * RFC 1002 session keep alive can sent by the server only when
+ * we established a RFC 1002 session. But Samba servers send
+ * RFC 1002 session keep alive also over port 445 on which
+ * RFC 1002 session is not established.
+ */
cifs_dbg(FYI, "RFC 1002 session keep alive\n");
break;
case RFC1002_POSITIVE_SESSION_RESPONSE:
- cifs_dbg(FYI, "RFC 1002 positive session response\n");
+ /*
+ * RFC 1002 positive session response cannot be returned
+ * for SMB request. RFC 1002 session response is handled
+ * exclusively in ip_rfc1001_connect() function.
+ */
+ cifs_server_dbg(VFS, "RFC 1002 positive session response (unexpected)\n");
+ cifs_reconnect(server, true);
break;
case RFC1002_NEGATIVE_SESSION_RESPONSE:
/*
* We get this from Windows 98 instead of an error on
- * SMB negprot response.
- */
- cifs_dbg(FYI, "RFC 1002 negative session response\n");
- /* give server a second to clean up */
- msleep(1000);
- /*
- * Always try 445 first on reconnect since we get NACK
- * on some if we ever connected to port 139 (the NACK
- * is since we do not begin with RFC1001 session
- * initialize frame).
+ * SMB negprot response, when we have not established
+ * RFC 1002 session (which means ip_rfc1001_connect()
+ * was skipped). Note that same still happens with
+ * Windows Server 2022 when connecting via port 139.
+ * So for this case when mount option -o nonbsessinit
+ * was not specified, try to reconnect with establishing
+ * RFC 1002 session. If new socket establishment with
+ * RFC 1002 session was successful then return to the
+ * mid's caller -EAGAIN, so it can retry the request.
*/
- cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
+ if (!cifs_rdma_enabled(server) &&
+ server->tcpStatus == CifsInNegotiate &&
+ !server->with_rfc1001 &&
+ server->rfc1001_sessinit != 0) {
+ int rc, mid_rc;
+ struct mid_q_entry *mid, *nmid;
+ LIST_HEAD(dispose_list);
+
+ cifs_dbg(FYI, "RFC 1002 negative session response during SMB Negotiate, retrying with NetBIOS session\n");
+
+ /*
+ * Before reconnect, delete all pending mids for this
+ * server, so reconnect would not signal connection
+ * aborted error to mid's callbacks. Note that for this
+ * server there should be exactly one pending mid
+ * corresponding to SMB1/SMB2 Negotiate packet.
+ */
+ spin_lock(&server->mid_lock);
+ list_for_each_entry_safe(mid, nmid, &server->pending_mid_q, qhead) {
+ kref_get(&mid->refcount);
+ list_move(&mid->qhead, &dispose_list);
+ mid->mid_flags |= MID_DELETED;
+ }
+ spin_unlock(&server->mid_lock);
+
+ /* Now try to reconnect once with NetBIOS session. */
+ server->with_rfc1001 = true;
+ rc = cifs_reconnect_once(server);
+
+ /*
+ * If reconnect was successful then indicate -EAGAIN
+ * to mid's caller. If reconnect failed with -EAGAIN
+ * then mask it as -EHOSTDOWN, so mid's caller would
+ * know that it failed.
+ */
+ if (rc == 0)
+ mid_rc = -EAGAIN;
+ else if (rc == -EAGAIN)
+ mid_rc = -EHOSTDOWN;
+ else
+ mid_rc = rc;
+
+ /*
+ * After reconnect (either successful or unsuccessful)
+ * deliver reconnect status to mid's caller via mid's
+ * callback. Use MID_RC state which indicates that the
+ * return code should be read from mid_rc member.
+ */
+ list_for_each_entry_safe(mid, nmid, &dispose_list, qhead) {
+ list_del_init(&mid->qhead);
+ mid->mid_rc = mid_rc;
+ mid->mid_state = MID_RC;
+ mid->callback(mid);
+ release_mid(mid);
+ }
+
+ /*
+ * If reconnect failed then wait two seconds. In most
+ * cases we were been called from the mount context and
+ * delivered failure to mid's callback will stop this
+ * receiver task thread and fails the mount process.
+ * So wait two seconds to prevent another reconnect
+ * in this task thread, which would be useless as the
+ * mount context will fail at all.
+ */
+ if (rc != 0)
+ msleep(2000);
+ } else {
+ cifs_server_dbg(VFS, "RFC 1002 negative session response (unexpected)\n");
+ cifs_reconnect(server, true);
+ }
+ break;
+ case RFC1002_RETARGET_SESSION_RESPONSE:
+ cifs_server_dbg(VFS, "RFC 1002 retarget session response (unexpected)\n");
cifs_reconnect(server, true);
break;
default:
memcpy(tcp_ses->server_RFC1001_name,
ctx->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
tcp_ses->rfc1001_sessinit = ctx->rfc1001_sessinit;
+ tcp_ses->with_rfc1001 = false;
tcp_ses->session_estab = false;
tcp_ses->sequence_number = 0;
tcp_ses->channel_sequence_num = 0; /* only tracked for primary channel */
return -EIO;
}
+ server->with_rfc1001 = true;
return 0;
}
* server port (139) and it was not explicitly disabled by mount option
* -o nonbsessinit.
*/
- if (server->rfc1001_sessinit == 1 ||
+ if (server->with_rfc1001 ||
+ server->rfc1001_sessinit == 1 ||
(server->rfc1001_sessinit == -1 && sport == htons(RFC1001_PORT)))
rc = ip_rfc1001_connect(server);
projects / thirdparty / linux.git / commitdiff
