216 		     nla_len(adm_ctx->my_addr) > sizeof(adm_ctx->connection->my_addr)) ||  in drbd_adm_prepare()
218 		     nla_len(adm_ctx->peer_addr) > sizeof(adm_ctx->connection->peer_addr))) {  in drbd_adm_prepare()
258 			adm_ctx->connection = conn_get_by_addrs(nla_data(adm_ctx->my_addr),  in drbd_adm_prepare()
262 		if (!adm_ctx->connection) {  in drbd_adm_prepare()
290 			: adm_ctx->connection ? adm_ctx->connection->resource : NULL;  in drbd_adm_prepare()
310 	if (adm_ctx->connection) {  in drbd_adm_finish()
311 		kref_put(&adm_ctx->connection->kref, &drbd_destroy_connection);  in drbd_adm_finish()
312 		adm_ctx->connection = NULL;  in drbd_adm_finish()
327 static void setup_khelper_env(struct drbd_connection *connection, char **envp)  in setup_khelper_env()  argument
332 	if (connection->my_addr_len == 0 || connection->peer_addr_len == 0)  in setup_khelper_env()
335 	switch (((struct sockaddr *)&connection->peer_addr)->sa_family) {  in setup_khelper_env()
339 			 &((struct sockaddr_in6 *)&connection->peer_addr)->sin6_addr);  in setup_khelper_env()
344 			 &((struct sockaddr_in *)&connection->peer_addr)->sin_addr);  in setup_khelper_env()
349 			 &((struct sockaddr_in *)&connection->peer_addr)->sin_addr);  in setup_khelper_env()
364 	struct drbd_connection *connection = first_peer_device(device)->connection;  in drbd_khelper()  local
368 	if (current == connection->worker.task)  in drbd_khelper()
369 		set_bit(CALLBACK_PENDING, &connection->flags);  in drbd_khelper()
372 	setup_khelper_env(connection, envp);  in drbd_khelper()
382 	notify_helper(NOTIFY_CALL, device, connection, cmd, 0);  in drbd_khelper()
395 	notify_helper(NOTIFY_RESPONSE, device, connection, cmd, ret);  in drbd_khelper()
397 	if (current == connection->worker.task)  in drbd_khelper()
398 		clear_bit(CALLBACK_PENDING, &connection->flags);  in drbd_khelper()
406 enum drbd_peer_state conn_khelper(struct drbd_connection *connection, char *cmd)  in conn_khelper()  argument
414 	char *resource_name = connection->resource->name;  in conn_khelper()
418 	setup_khelper_env(connection, envp);  in conn_khelper()
419 	conn_md_sync(connection);  in conn_khelper()
421 	drbd_info(connection, "helper command: %s %s %s\n", drbd_usermode_helper, cmd, resource_name);  in conn_khelper()
423 	notify_helper(NOTIFY_CALL, NULL, connection, cmd, 0);  in conn_khelper()
427 		drbd_warn(connection, "helper command: %s %s %s exit code %u (0x%x)\n",  in conn_khelper()
431 		drbd_info(connection, "helper command: %s %s %s exit code %u (0x%x)\n",  in conn_khelper()
435 	notify_helper(NOTIFY_RESPONSE, NULL, connection, cmd, ret);  in conn_khelper()
443 static enum drbd_fencing_p highest_fencing_policy(struct drbd_connection *connection)  in highest_fencing_policy()  argument
450 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {  in highest_fencing_policy()
469 bool conn_try_outdate_peer(struct drbd_connection *connection)  in conn_try_outdate_peer()  argument
471 	struct drbd_resource * const resource = connection->resource;  in conn_try_outdate_peer()
480 	if (connection->cstate >= C_WF_REPORT_PARAMS) {  in conn_try_outdate_peer()
481 		drbd_err(connection, "Expected cstate < C_WF_REPORT_PARAMS\n");  in conn_try_outdate_peer()
486 	connect_cnt = connection->connect_cnt;  in conn_try_outdate_peer()
489 	fp = highest_fencing_policy(connection);  in conn_try_outdate_peer()
492 		drbd_warn(connection, "Not fencing peer, I'm not even Consistent myself.\n");  in conn_try_outdate_peer()
494 		if (connection->cstate < C_WF_REPORT_PARAMS) {  in conn_try_outdate_peer()
495 			_conn_request_state(connection,  in conn_try_outdate_peer()
503 				_tl_restart(connection, CONNECTION_LOST_WHILE_PENDING);  in conn_try_outdate_peer()
519 	r = conn_khelper(connection, "fence-peer");  in conn_try_outdate_peer()
533 		if (conn_highest_disk(connection) == D_UP_TO_DATE) {  in conn_try_outdate_peer()
546 		drbd_warn(connection, "Peer is primary, outdating myself.\n");  in conn_try_outdate_peer()
554 			drbd_err(connection, "fence-peer() = 7 && fencing != Stonith !!!\n");  in conn_try_outdate_peer()
561 		drbd_err(connection, "fence-peer helper broken, returned %d\n", (r>>8)&0xff);  in conn_try_outdate_peer()
565 	drbd_info(connection, "fence-peer helper returned %d (%s)\n",  in conn_try_outdate_peer()
573 	if (connection->cstate < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &connection->flags)) {  in conn_try_outdate_peer()
574 		if (connection->connect_cnt != connect_cnt)  in conn_try_outdate_peer()
577 			drbd_info(connection, "Ignoring fence-peer exit code\n");  in conn_try_outdate_peer()
579 			_conn_request_state(connection, mask, val, CS_VERBOSE);  in conn_try_outdate_peer()
583 	return conn_highest_pdsk(connection) <= D_OUTDATED;  in conn_try_outdate_peer()
588 	struct drbd_connection *connection = (struct drbd_connection *)data;  in _try_outdate_peer_async()  local
590 	conn_try_outdate_peer(connection);  in _try_outdate_peer_async()
592 	kref_put(&connection->kref, drbd_destroy_connection);  in _try_outdate_peer_async()
596 void conn_try_outdate_peer_async(struct drbd_connection *connection)  in conn_try_outdate_peer_async()  argument
600 	kref_get(&connection->kref);  in conn_try_outdate_peer_async()
607 	opa = kthread_run(_try_outdate_peer_async, connection, "drbd_async_h");  in conn_try_outdate_peer_async()
609 		drbd_err(connection, "out of mem, failed to invoke fence-peer helper\n");  in conn_try_outdate_peer_async()
610 		kref_put(&connection->kref, drbd_destroy_connection);  in conn_try_outdate_peer_async()
618 	struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL;  in drbd_set_role()  local
627 		struct drbd_connection *connection;  in drbd_set_role()  local
632 		for_each_connection(connection, device->resource)  in drbd_set_role()
633 			request_ping(connection);  in drbd_set_role()
666 			if (conn_try_outdate_peer(connection)) {  in drbd_set_role()
676 			if (!conn_try_outdate_peer(connection) && force) {  in drbd_set_role()
691 				nc = rcu_dereference(connection->net_conf);  in drbd_set_role()
725 		nc = connection->net_conf;  in drbd_set_role()
1197 static unsigned int drbd_max_discard_sectors(struct drbd_connection *connection)  in drbd_max_discard_sectors()  argument
1201 	if (connection->agreed_features & DRBD_FF_WSAME)  in drbd_max_discard_sectors()
1210 	struct drbd_connection *connection =  in decide_on_discard_support()  local
1211 		first_peer_device(device)->connection;  in decide_on_discard_support()
1218 	if (connection->cstate >= C_CONNECTED &&  in decide_on_discard_support()
1219 	    !(connection->agreed_features & DRBD_FF_TRIM)) {  in decide_on_discard_support()
1220 		drbd_info(connection,  in decide_on_discard_support()
1234 	max_discard_sectors = drbd_max_discard_sectors(connection);  in decide_on_discard_support()
1250 	struct drbd_connection *connection = first_peer_device(device)->connection;  in fixup_write_zeroes()  local
1253 	if (connection->agreed_features & DRBD_FF_WZEROES)  in fixup_write_zeroes()
1324 		if (first_peer_device(device)->connection->agreed_pro_version < 94)  in drbd_reconsider_queue_parameters()
1327 		else if (first_peer_device(device)->connection->agreed_pro_version == 94)  in drbd_reconsider_queue_parameters()
1329 		else if (first_peer_device(device)->connection->agreed_pro_version < 100)  in drbd_reconsider_queue_parameters()
1353 static void conn_reconfig_start(struct drbd_connection *connection)  in conn_reconfig_start()  argument
1355 	drbd_thread_start(&connection->worker);  in conn_reconfig_start()
1356 	drbd_flush_workqueue(&connection->sender_work);  in conn_reconfig_start()
1360 static void conn_reconfig_done(struct drbd_connection *connection)  in conn_reconfig_done()  argument
1363 	spin_lock_irq(&connection->resource->req_lock);  in conn_reconfig_done()
1364 	stop_threads = conn_all_vols_unconf(connection) &&  in conn_reconfig_done()
1365 		connection->cstate == C_STANDALONE;  in conn_reconfig_done()
1366 	spin_unlock_irq(&connection->resource->req_lock);  in conn_reconfig_done()
1370 		drbd_thread_stop(&connection->receiver);  in conn_reconfig_done()
1371 		drbd_thread_stop(&connection->worker);  in conn_reconfig_done()
1728 	struct drbd_connection *connection;  in drbd_adm_attach()  local
1751 	connection = peer_device->connection;  in drbd_adm_attach()
1752 	conn_reconfig_start(connection);  in drbd_adm_attach()
1813 	nc = rcu_dereference(connection->net_conf);  in drbd_adm_attach()
1903 	drbd_flush_workqueue(&connection->sender_work);  in drbd_adm_attach()
2120 	conn_reconfig_done(connection);  in drbd_adm_attach()
2131 	conn_reconfig_done(connection);  in drbd_adm_attach()
2195 static bool conn_resync_running(struct drbd_connection *connection)  in conn_resync_running()  argument
2202 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {  in conn_resync_running()
2217 static bool conn_ov_running(struct drbd_connection *connection)  in conn_ov_running()  argument
2224 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {  in conn_ov_running()
2238 _check_net_options(struct drbd_connection *connection, struct net_conf *old_net_conf, struct net_co…  in _check_net_options()  argument
2243 …if (old_net_conf && connection->cstate == C_WF_REPORT_PARAMS && connection->agreed_pro_version < 1…  in _check_net_options()
2255 	    conn_highest_role(connection) == R_PRIMARY &&  in _check_net_options()
2256 	    conn_highest_peer(connection) == R_PRIMARY)  in _check_net_options()
2263 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in _check_net_options()
2282 check_net_options(struct drbd_connection *connection, struct net_conf *new_net_conf)  in check_net_options()  argument
2289 	rv = _check_net_options(connection, rcu_dereference(connection->net_conf), new_net_conf);  in check_net_options()
2293 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in check_net_options()
2367 	struct drbd_connection *connection;  in drbd_adm_net_opts()  local
2380 	connection = adm_ctx.connection;  in drbd_adm_net_opts()
2389 	conn_reconfig_start(connection);  in drbd_adm_net_opts()
2391 	mutex_lock(&connection->data.mutex);  in drbd_adm_net_opts()
2392 	mutex_lock(&connection->resource->conf_update);  in drbd_adm_net_opts()
2393 	old_net_conf = connection->net_conf;  in drbd_adm_net_opts()
2412 	retcode = check_net_options(connection, new_net_conf);  in drbd_adm_net_opts()
2417 	rsr = conn_resync_running(connection);  in drbd_adm_net_opts()
2424 	ovr = conn_ov_running(connection);  in drbd_adm_net_opts()
2434 	rcu_assign_pointer(connection->net_conf, new_net_conf);  in drbd_adm_net_opts()
2437 		crypto_free_shash(connection->csums_tfm);  in drbd_adm_net_opts()
2438 		connection->csums_tfm = crypto.csums_tfm;  in drbd_adm_net_opts()
2442 		crypto_free_shash(connection->verify_tfm);  in drbd_adm_net_opts()
2443 		connection->verify_tfm = crypto.verify_tfm;  in drbd_adm_net_opts()
2447 	crypto_free_shash(connection->integrity_tfm);  in drbd_adm_net_opts()
2448 	connection->integrity_tfm = crypto.integrity_tfm;  in drbd_adm_net_opts()
2449 	if (connection->cstate >= C_WF_REPORT_PARAMS && connection->agreed_pro_version >= 100)  in drbd_adm_net_opts()
2451 		__drbd_send_protocol(connection, P_PROTOCOL_UPDATE);  in drbd_adm_net_opts()
2453 	crypto_free_shash(connection->cram_hmac_tfm);  in drbd_adm_net_opts()
2454 	connection->cram_hmac_tfm = crypto.cram_hmac_tfm;  in drbd_adm_net_opts()
2456 	mutex_unlock(&connection->resource->conf_update);  in drbd_adm_net_opts()
2457 	mutex_unlock(&connection->data.mutex);  in drbd_adm_net_opts()
2460 	if (connection->cstate >= C_WF_REPORT_PARAMS) {  in drbd_adm_net_opts()
2464 		idr_for_each_entry(&connection->peer_devices, peer_device, vnr)  in drbd_adm_net_opts()
2471 	mutex_unlock(&connection->resource->conf_update);  in drbd_adm_net_opts()
2472 	mutex_unlock(&connection->data.mutex);  in drbd_adm_net_opts()
2476 	conn_reconfig_done(connection);  in drbd_adm_net_opts()
2485 			       struct drbd_connection *connection)  in connection_to_info()  argument
2487 	info->conn_connection_state = connection->cstate;  in connection_to_info()
2488 	info->conn_role = conn_highest_peer(connection);  in connection_to_info()
2514 	struct drbd_connection *connection;  in drbd_adm_connect()  local
2536 		for_each_connection(connection, resource) {  in drbd_adm_connect()
2537 			if (nla_len(adm_ctx.my_addr) == connection->my_addr_len &&  in drbd_adm_connect()
2538 			    !memcmp(nla_data(adm_ctx.my_addr), &connection->my_addr,  in drbd_adm_connect()
2539 				    connection->my_addr_len)) {  in drbd_adm_connect()
2544 			if (nla_len(adm_ctx.peer_addr) == connection->peer_addr_len &&  in drbd_adm_connect()
2545 			    !memcmp(nla_data(adm_ctx.peer_addr), &connection->peer_addr,  in drbd_adm_connect()
2546 				    connection->peer_addr_len)) {  in drbd_adm_connect()
2554 	connection = first_connection(adm_ctx.resource);  in drbd_adm_connect()
2555 	conn_reconfig_start(connection);  in drbd_adm_connect()
2557 	if (connection->cstate > C_STANDALONE) {  in drbd_adm_connect()
2578 	retcode = check_net_options(connection, new_net_conf);  in drbd_adm_connect()
2588 	drbd_flush_workqueue(&connection->sender_work);  in drbd_adm_connect()
2591 	old_net_conf = connection->net_conf;  in drbd_adm_connect()
2597 	rcu_assign_pointer(connection->net_conf, new_net_conf);  in drbd_adm_connect()
2599 	conn_free_crypto(connection);  in drbd_adm_connect()
2600 	connection->cram_hmac_tfm = crypto.cram_hmac_tfm;  in drbd_adm_connect()
2601 	connection->integrity_tfm = crypto.integrity_tfm;  in drbd_adm_connect()
2602 	connection->csums_tfm = crypto.csums_tfm;  in drbd_adm_connect()
2603 	connection->verify_tfm = crypto.verify_tfm;  in drbd_adm_connect()
2605 	connection->my_addr_len = nla_len(adm_ctx.my_addr);  in drbd_adm_connect()
2606 	memcpy(&connection->my_addr, nla_data(adm_ctx.my_addr), connection->my_addr_len);  in drbd_adm_connect()
2607 	connection->peer_addr_len = nla_len(adm_ctx.peer_addr);  in drbd_adm_connect()
2608 	memcpy(&connection->peer_addr, nla_data(adm_ctx.peer_addr), connection->peer_addr_len);  in drbd_adm_connect()
2610 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in drbd_adm_connect()
2614 	connection_to_info(&connection_info, connection);  in drbd_adm_connect()
2617 	notify_connection_state(NULL, 0, connection, &connection_info, NOTIFY_CREATE | flags);  in drbd_adm_connect()
2618 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in drbd_adm_connect()
2629 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in drbd_adm_connect()
2636 	rv = conn_request_state(connection, NS(conn, C_UNCONNECTED), CS_VERBOSE);  in drbd_adm_connect()
2638 	conn_reconfig_done(connection);  in drbd_adm_connect()
2647 	conn_reconfig_done(connection);  in drbd_adm_connect()
2654 static enum drbd_state_rv conn_try_disconnect(struct drbd_connection *connection, bool force)  in conn_try_disconnect()  argument
2660 	rv = conn_request_state(connection, NS(conn, C_DISCONNECTING),  in conn_try_disconnect()
2670 		rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING, pdsk, D_OUTDATED), 0);  in conn_try_disconnect()
2673 			rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), CS_VERBOSE);  in conn_try_disconnect()
2677 		spin_lock_irq(&connection->resource->req_lock);  in conn_try_disconnect()
2678 		cstate = connection->cstate;  in conn_try_disconnect()
2679 		spin_unlock_irq(&connection->resource->req_lock);  in conn_try_disconnect()
2683 		rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING,  in conn_try_disconnect()
2686 			rv = conn_request_state(connection, NS(conn, C_DISCONNECTING),  in conn_try_disconnect()
2700 		drbd_thread_stop(&connection->receiver);  in conn_try_disconnect()
2708 		rv2 = conn_request_state(connection, NS(conn, C_STANDALONE),  in conn_try_disconnect()
2711 			drbd_err(connection,  in conn_try_disconnect()
2724 	struct drbd_connection *connection;  in drbd_adm_disconnect()  local
2735 	connection = adm_ctx.connection;  in drbd_adm_disconnect()
2747 	rv = conn_try_disconnect(connection, parms.force_disconnect);  in drbd_adm_disconnect()
2767 		iass = test_bit(RESOLVE_CONFLICTS, &first_peer_device(device)->connection->flags);  in resync_after_online_grow()
2824 	if (rs.no_resync && first_peer_device(device)->connection->agreed_pro_version < 93) {  in drbd_adm_resize()
2974 	drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work);  in drbd_adm_invalidate()
3052 	drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work);  in drbd_adm_invalidate_peer()
3176 			tl_clear(first_peer_device(device)->connection);  in drbd_adm_resume_io()
3178 			tl_restart(first_peer_device(device)->connection, FAIL_FROZEN_DISK_IO);  in drbd_adm_resume_io()
3194 				    struct drbd_connection *connection,  in nla_put_drbd_cfg_context()  argument
3206 	if (connection) {  in nla_put_drbd_cfg_context()
3207 		if (connection->my_addr_len &&  in nla_put_drbd_cfg_context()
3208 		    nla_put(skb, T_ctx_my_addr, connection->my_addr_len, &connection->my_addr))  in nla_put_drbd_cfg_context()
3210 		if (connection->peer_addr_len &&  in nla_put_drbd_cfg_context()
3211 		    nla_put(skb, T_ctx_peer_addr, connection->peer_addr_len, &connection->peer_addr))  in nla_put_drbd_cfg_context()
3447 	struct drbd_connection *connection;  in drbd_adm_dump_connections()  local
3480 		for_each_connection_rcu(connection, resource)  in drbd_adm_dump_connections()
3481 			if (connection == (struct drbd_connection *)cb->args[2])  in drbd_adm_dump_connections()
3486 	connection = list_entry(&resource->connections, struct drbd_connection, connections);  in drbd_adm_dump_connections()
3489 	list_for_each_entry_continue_rcu(connection, &resource->connections, connections) {  in drbd_adm_dump_connections()
3490 		if (!has_net_conf(connection))  in drbd_adm_dump_connections()
3530 		err = nla_put_drbd_cfg_context(skb, resource, connection, NULL);  in drbd_adm_dump_connections()
3533 		net_conf = rcu_dereference(connection->net_conf);  in drbd_adm_dump_connections()
3539 		connection_to_info(&connection_info, connection);  in drbd_adm_dump_connections()
3543 		connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags);  in drbd_adm_dump_connections()
3547 		cb->args[2] = (long)connection;  in drbd_adm_dump_connections()
3653 		if (!has_net_conf(peer_device->connection))  in drbd_adm_dump_peer_devices()
3674 		err = nla_put_drbd_cfg_context(skb, device->resource, peer_device->connection, device);  in drbd_adm_dump_peer_devices()
3752 		nc = rcu_dereference(first_peer_device(device)->connection->net_conf);  in nla_put_status_info()
3932 			struct drbd_connection *connection;  in get_one_status()  local
3936 			connection = the_only_connection(resource);  in get_one_status()
3937 			if (nla_put_drbd_cfg_context(skb, resource, connection, NULL))  in get_one_status()
3939 			if (connection) {  in get_one_status()
3942 				nc = rcu_dereference(connection->net_conf);  in get_one_status()
4147 	    first_peer_device(device)->connection->agreed_pro_version >= 90 &&  in drbd_adm_new_c_uuid()
4216 	struct drbd_connection *connection;  in drbd_adm_new_resource()  local
4251 	connection = conn_create(adm_ctx.resource_name, &res_opts);  in drbd_adm_new_resource()
4254 	if (connection) {  in drbd_adm_new_resource()
4258 		resource_to_info(&resource_info, connection->resource);  in drbd_adm_new_resource()
4259 		notify_resource_state(NULL, 0, connection->resource,  in drbd_adm_new_resource()
4320 			if (!has_net_conf(peer_device->connection))  in drbd_adm_new_minor()
4332 			if (!has_net_conf(peer_device->connection))  in drbd_adm_new_minor()
4356 		struct drbd_connection *connection =  in adm_del_minor()  local
4365 		if (get_t_state(&connection->worker) == RUNNING)  in adm_del_minor()
4366 			drbd_flush_workqueue(&connection->sender_work);  in adm_del_minor()
4370 			if (!has_net_conf(peer_device->connection))  in adm_del_minor()
4405 	struct drbd_connection *connection;  in adm_del_resource()  local
4407 	for_each_connection(connection, resource) {  in adm_del_resource()
4408 		if (connection->cstate > C_STANDALONE)  in adm_del_resource()
4426 	list_for_each_entry(connection, &resource->connections, connections)  in adm_del_resource()
4427 		drbd_thread_stop(&connection->worker);  in adm_del_resource()
4437 	struct drbd_connection *connection;  in drbd_adm_down()  local
4451 	for_each_connection(connection, resource) {  in drbd_adm_down()
4454 		idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in drbd_adm_down()
4462 		retcode = conn_try_disconnect(connection, 0);  in drbd_adm_down()
4668 			     struct drbd_connection *connection,  in notify_connection_state()  argument
4692 	if (nla_put_drbd_cfg_context(skb, connection->resource, connection, NULL) ||  in notify_connection_state()
4697 	connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags);  in notify_connection_state()
4711 	drbd_err(connection, "Error %d while broadcasting event. Event seq:%u\n",  in notify_connection_state()
4743 	if (nla_put_drbd_cfg_context(skb, resource, peer_device->connection, peer_device->device) ||  in notify_peer_device_state()
4768 		   struct drbd_device *device, struct drbd_connection *connection,  in notify_helper()  argument
4771 	struct drbd_resource *resource = device ? device->resource : connection->resource;  in notify_helper()
4794 	if (nla_put_drbd_cfg_context(skb, resource, connection, device) ||  in notify_helper()