block/drbd/drbd_state.c

46 	struct drbd_connection *connection;
54 	for_each_connection(connection, resource)
79 		state_change->connections[n].connection = NULL;
88 	struct drbd_connection *connection;
112 	for_each_connection(connection, resource) {
113 		kref_get(&connection->kref);
114 		connection_state_change->connection = connection;
116 			connection->cstate;
118 			conn_highest_peer(connection);
131 		for_each_connection(connection, resource) {
134 			peer_device = conn_peer_device(connection, device->vnr);
184 		struct drbd_connection *connection =
185 			connection_state_change->connection;
187 		connection_state_change->cstate[NEW] = connection->cstate;
189 			conn_highest_peer(connection);
270 		struct drbd_connection *connection =
271 			state_change->connections[n].connection;
273 		if (connection)
274 			kref_put(&connection->kref, drbd_destroy_connection);
294 bool conn_all_vols_unconf(struct drbd_connection *connection)
301 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
335 enum drbd_role conn_highest_role(struct drbd_connection *connection)
342 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
351 enum drbd_role conn_highest_peer(struct drbd_connection *connection)
358 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
367 enum drbd_disk_state conn_highest_disk(struct drbd_connection *connection)
374 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
383 enum drbd_disk_state conn_lowest_disk(struct drbd_connection *connection)
390 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
399 enum drbd_disk_state conn_highest_pdsk(struct drbd_connection *connection)
406 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
415 enum drbd_conns conn_lowest_conn(struct drbd_connection *connection)
422 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
431 static bool no_peer_wf_report_params(struct drbd_connection *connection)
438 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
448 static void wake_up_all_devices(struct drbd_connection *connection)
454 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
542 			rv = is_valid_soft_transition(os, ns, first_peer_device(device)->connection);
591 			rv = is_valid_soft_transition(os, ns, first_peer_device(device)->connection);
625 		D_ASSERT(device, current != first_peer_device(device)->connection->worker.task);
799 static void conn_pr_state_change(struct drbd_connection *connection, union drbd_state os, union drbd_state ns,
813 		drbd_info(connection, "%s\n", pb);
838 	nc = rcu_dereference(first_peer_device(device)->connection->net_conf);
843 			else if (conn_highest_peer(first_peer_device(device)->connection) == R_PRIMARY)
884 		  first_peer_device(device)->connection->agreed_pro_version < 88)
909  * @connection:  DRBD connection.
912 is_valid_soft_transition(union drbd_state os, union drbd_state ns, struct drbd_connection *connection)
935 	/* While establishing a connection only allow cstate to change.
937 	if (test_bit(STATE_SENT, &connection->flags) &&
976 	/* no change -> nothing to do, at least for the connection part */
980 	/* disconnect of an unconfigured connection does not make sense */
988 	/* When establishing a connection we need to go through WF_REPORT_PARAMS!
1049  * When we loose connection, we have to set the state of the peers disk (pdsk)
1069 	/* Implications from connection to peer and peer_isp */
1081 	/* An implication of the disk states onto the connection state */
1113 	/* Implications of the connection state on the disk states */
1229 	if (peer_device->connection->agreed_pro_version < 90)
1267 	struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
1294 				rv = is_valid_soft_transition(os, ns, connection);
1296 			rv = is_valid_soft_transition(os, ns, connection);
1313 		conn_pr_state_change(connection, os, ns,
1345 		start_new_tl_epoch(connection);
1350 	/* Wake up role changes, that were delayed because of connection establishing */
1352 	    no_peer_wf_report_params(connection)) {
1353 		clear_bit(STATE_SENT, &connection->flags);
1354 		wake_up_all_devices(connection);
1359 	wake_up(&connection->ping_wait);
1447 		drbd_thread_stop_nowait(&connection->receiver);
1451 		drbd_thread_stop_nowait(&connection->receiver);
1456 		drbd_thread_restart_nowait(&connection->receiver);
1458 	/* Resume AL writing if we get a connection */
1461 		connection->connect_cnt++;
1480 		drbd_queue_work(&connection->sender_work,
1529 	D_ASSERT(device, current == first_peer_device(device)->connection->worker.task);
1566 	struct drbd_connection *connection = p->connection;
1572 	return notify_connection_state(skb, seq, connection, &connection_info, type);
1714 	struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
1744 		if (os.conn < C_CONNECTED && conn_lowest_conn(connection) >= C_CONNECTED)
1748 		    conn_lowest_disk(connection) == D_UP_TO_DATE)
1752 			_tl_restart(connection, what);
1753 			_conn_request_state(connection,
1763 		if (resource->susp_fen && conn_lowest_conn(connection) >= C_CONNECTED) {
1764 			/* case2: The connection was established again: */
1769 			idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
1779 			_tl_restart(connection, RESEND);
1780 			_conn_request_state(connection,
1794 	    connection->agreed_pro_version >= 96 && get_ldev(device)) {
1812 	/* No point in queuing send_bitmap if we don't have a connection
2043 	struct drbd_connection *connection;
2051 	struct drbd_connection *connection = acscw->connection;
2063 		drbd_thread_start(&connection->receiver);
2069 		idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
2072 		notify_connection_state(NULL, 0, connection, NULL, NOTIFY_DESTROY);
2075 		mutex_lock(&connection->resource->conf_update);
2076 		old_conf = connection->net_conf;
2077 		connection->my_addr_len = 0;
2078 		connection->peer_addr_len = 0;
2079 		RCU_INIT_POINTER(connection->net_conf, NULL);
2080 		conn_free_crypto(connection);
2081 		mutex_unlock(&connection->resource->conf_update);
2090 			idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
2098 			spin_lock_irq(&connection->resource->req_lock);
2099 			_tl_restart(connection, CONNECTION_LOST_WHILE_PENDING);
2100 			_conn_request_state(connection,
2104 			spin_unlock_irq(&connection->resource->req_lock);
2107 	conn_md_sync(connection);
2108 	kref_put(&connection->kref, drbd_destroy_connection);
2113 static void conn_old_common_state(struct drbd_connection *connection, union drbd_state *pcs, enum chg_state_flags *pf)
2121 		  .conn = connection->cstate,
2127 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
2160 conn_is_valid_transition(struct drbd_connection *connection, union drbd_state mask, union drbd_state val,
2169 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
2186 					rv = is_valid_soft_transition(os, ns, connection);
2188 				rv = is_valid_soft_transition(os, ns, connection);
2203 conn_set_state(struct drbd_connection *connection, union drbd_state mask, union drbd_state val,
2222 		if (connection->cstate != C_WF_REPORT_PARAMS && val.conn == C_WF_REPORT_PARAMS)
2223 			connection->last_reconnect_jif = jiffies;
2225 		connection->cstate = val.conn;
2229 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
2266 	ns_min.susp = ns_max.susp = connection->resource->susp;
2267 	ns_min.susp_nod = ns_max.susp_nod = connection->resource->susp_nod;
2268 	ns_min.susp_fen = ns_max.susp_fen = connection->resource->susp_fen;
2275 _conn_rq_cond(struct drbd_connection *connection, union drbd_state mask, union drbd_state val)
2279 	if (test_and_clear_bit(CONN_WD_ST_CHG_OKAY, &connection->flags))
2282 	if (test_and_clear_bit(CONN_WD_ST_CHG_FAIL, &connection->flags))
2285 	err = conn_is_valid_transition(connection, mask, val, 0);
2286 	if (err == SS_SUCCESS && connection->cstate == C_WF_REPORT_PARAMS)
2293 _conn_request_state(struct drbd_connection *connection, union drbd_state mask, union drbd_state val,
2298 	enum drbd_conns oc = connection->cstate;
2309 	rv = conn_is_valid_transition(connection, mask, val, flags);
2319 		spin_unlock_irq(&connection->resource->req_lock);
2320 		mutex_lock(&connection->cstate_mutex);
2323 		set_bit(CONN_WD_ST_CHG_REQ, &connection->flags);
2324 		if (conn_send_state_req(connection, mask, val)) {
2326 			clear_bit(CONN_WD_ST_CHG_REQ, &connection->flags);
2333 			set_bit(DISCONNECT_SENT, &connection->flags);
2338 		spin_lock_irq(&connection->resource->req_lock);
2339 		wait_event_lock_irq(connection->ping_wait,
2340 				(rv = _conn_rq_cond(connection, mask, val)),
2341 				connection->resource->req_lock);
2342 		clear_bit(CONN_WD_ST_CHG_REQ, &connection->flags);
2347 	state_change = remember_old_state(connection->resource, GFP_ATOMIC);
2348 	conn_old_common_state(connection, &os, &flags);
2350 	conn_set_state(connection, mask, val, &ns_min, &ns_max, flags);
2351 	conn_pr_state_change(connection, os, ns_max, flags);
2361 		kref_get(&connection->kref);
2362 		acscw->connection = connection;
2364 		drbd_queue_work(&connection->sender_work, &acscw->w);
2366 		drbd_err(connection, "Could not kmalloc an acscw\n");
2373 		spin_unlock_irq(&connection->resource->req_lock);
2375 		mutex_unlock(&connection->cstate_mutex);
2376 		spin_lock_irq(&connection->resource->req_lock);
2379 		drbd_err(connection, "State change failed: %s\n", drbd_set_st_err_str(rv));
2380 		drbd_err(connection, " mask = 0x%x val = 0x%x\n", mask.i, val.i);
2381 		drbd_err(connection, " old_conn:%s wanted_conn:%s\n", drbd_conn_str(oc), drbd_conn_str(val.conn));
2387 conn_request_state(struct drbd_connection *connection, union drbd_state mask, union drbd_state val,
2392 	spin_lock_irq(&connection->resource->req_lock);
2393 	rv = _conn_request_state(connection, mask, val, flags);
2394 	spin_unlock_irq(&connection->resource->req_lock);