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()
1201 	if (first_peer_device(device)->connection->agreed_pro_version < 94)  in drbd_max_peer_bio_size()
1208 	if (first_peer_device(device)->connection->agreed_pro_version == 94)  in drbd_max_peer_bio_size()
1214 	if (first_peer_device(device)->connection->agreed_pro_version < 100)  in drbd_max_peer_bio_size()
1219 static unsigned int drbd_max_discard_sectors(struct drbd_connection *connection)  in drbd_max_discard_sectors()  argument
1223 	if (connection->agreed_features & DRBD_FF_WSAME)  in drbd_max_discard_sectors()
1229 static bool drbd_discard_supported(struct drbd_connection *connection,  in drbd_discard_supported()  argument
1235 	if (connection->cstate >= C_CONNECTED &&  in drbd_discard_supported()
1236 	    !(connection->agreed_features & DRBD_FF_TRIM)) {  in drbd_discard_supported()
1237 		drbd_info(connection,  in drbd_discard_supported()
1262 	struct drbd_connection *connection =  in drbd_reconsider_queue_parameters()  local
1263 		first_peer_device(device)->connection;  in drbd_reconsider_queue_parameters()
1312 	if (drbd_discard_supported(connection, bdev)) {  in drbd_reconsider_queue_parameters()
1315 			drbd_max_discard_sectors(connection);  in drbd_reconsider_queue_parameters()
1329 	if (connection->agreed_features & DRBD_FF_WZEROES)  in drbd_reconsider_queue_parameters()
1345 static void conn_reconfig_start(struct drbd_connection *connection)  in conn_reconfig_start()  argument
1347 	drbd_thread_start(&connection->worker);  in conn_reconfig_start()
1348 	drbd_flush_workqueue(&connection->sender_work);  in conn_reconfig_start()
1352 static void conn_reconfig_done(struct drbd_connection *connection)  in conn_reconfig_done()  argument
1355 	spin_lock_irq(&connection->resource->req_lock);  in conn_reconfig_done()
1356 	stop_threads = conn_all_vols_unconf(connection) &&  in conn_reconfig_done()
1357 		connection->cstate == C_STANDALONE;  in conn_reconfig_done()
1358 	spin_unlock_irq(&connection->resource->req_lock);  in conn_reconfig_done()
1362 		drbd_thread_stop(&connection->receiver);  in conn_reconfig_done()
1363 		drbd_thread_stop(&connection->worker);  in conn_reconfig_done()
1721 	struct drbd_connection *connection;  in drbd_adm_attach()  local
1744 	connection = peer_device->connection;  in drbd_adm_attach()
1745 	conn_reconfig_start(connection);  in drbd_adm_attach()
1806 	nc = rcu_dereference(connection->net_conf);  in drbd_adm_attach()
1896 	drbd_flush_workqueue(&connection->sender_work);  in drbd_adm_attach()
2113 	conn_reconfig_done(connection);  in drbd_adm_attach()
2124 	conn_reconfig_done(connection);  in drbd_adm_attach()
2186 static bool conn_resync_running(struct drbd_connection *connection)  in conn_resync_running()  argument
2193 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {  in conn_resync_running()
2208 static bool conn_ov_running(struct drbd_connection *connection)  in conn_ov_running()  argument
2215 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {  in conn_ov_running()
2229 _check_net_options(struct drbd_connection *connection, struct net_conf *old_net_conf, struct net_co…  in _check_net_options()  argument
2234 …if (old_net_conf && connection->cstate == C_WF_REPORT_PARAMS && connection->agreed_pro_version < 1…  in _check_net_options()
2246 	    conn_highest_role(connection) == R_PRIMARY &&  in _check_net_options()
2247 	    conn_highest_peer(connection) == R_PRIMARY)  in _check_net_options()
2254 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in _check_net_options()
2273 check_net_options(struct drbd_connection *connection, struct net_conf *new_net_conf)  in check_net_options()  argument
2280 	rv = _check_net_options(connection, rcu_dereference(connection->net_conf), new_net_conf);  in check_net_options()
2284 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in check_net_options()
2358 	struct drbd_connection *connection;  in drbd_adm_net_opts()  local
2371 	connection = adm_ctx.connection;  in drbd_adm_net_opts()
2380 	conn_reconfig_start(connection);  in drbd_adm_net_opts()
2382 	mutex_lock(&connection->data.mutex);  in drbd_adm_net_opts()
2383 	mutex_lock(&connection->resource->conf_update);  in drbd_adm_net_opts()
2384 	old_net_conf = connection->net_conf;  in drbd_adm_net_opts()
2403 	retcode = check_net_options(connection, new_net_conf);  in drbd_adm_net_opts()
2408 	rsr = conn_resync_running(connection);  in drbd_adm_net_opts()
2415 	ovr = conn_ov_running(connection);  in drbd_adm_net_opts()
2425 	rcu_assign_pointer(connection->net_conf, new_net_conf);  in drbd_adm_net_opts()
2428 		crypto_free_shash(connection->csums_tfm);  in drbd_adm_net_opts()
2429 		connection->csums_tfm = crypto.csums_tfm;  in drbd_adm_net_opts()
2433 		crypto_free_shash(connection->verify_tfm);  in drbd_adm_net_opts()
2434 		connection->verify_tfm = crypto.verify_tfm;  in drbd_adm_net_opts()
2438 	crypto_free_shash(connection->integrity_tfm);  in drbd_adm_net_opts()
2439 	connection->integrity_tfm = crypto.integrity_tfm;  in drbd_adm_net_opts()
2440 	if (connection->cstate >= C_WF_REPORT_PARAMS && connection->agreed_pro_version >= 100)  in drbd_adm_net_opts()
2442 		__drbd_send_protocol(connection, P_PROTOCOL_UPDATE);  in drbd_adm_net_opts()
2444 	crypto_free_shash(connection->cram_hmac_tfm);  in drbd_adm_net_opts()
2445 	connection->cram_hmac_tfm = crypto.cram_hmac_tfm;  in drbd_adm_net_opts()
2447 	mutex_unlock(&connection->resource->conf_update);  in drbd_adm_net_opts()
2448 	mutex_unlock(&connection->data.mutex);  in drbd_adm_net_opts()
2451 	if (connection->cstate >= C_WF_REPORT_PARAMS) {  in drbd_adm_net_opts()
2455 		idr_for_each_entry(&connection->peer_devices, peer_device, vnr)  in drbd_adm_net_opts()
2462 	mutex_unlock(&connection->resource->conf_update);  in drbd_adm_net_opts()
2463 	mutex_unlock(&connection->data.mutex);  in drbd_adm_net_opts()
2467 	conn_reconfig_done(connection);  in drbd_adm_net_opts()
2476 			       struct drbd_connection *connection)  in connection_to_info()  argument
2478 	info->conn_connection_state = connection->cstate;  in connection_to_info()
2479 	info->conn_role = conn_highest_peer(connection);  in connection_to_info()
2505 	struct drbd_connection *connection;  in drbd_adm_connect()  local
2527 		for_each_connection(connection, resource) {  in drbd_adm_connect()
2528 			if (nla_len(adm_ctx.my_addr) == connection->my_addr_len &&  in drbd_adm_connect()
2529 			    !memcmp(nla_data(adm_ctx.my_addr), &connection->my_addr,  in drbd_adm_connect()
2530 				    connection->my_addr_len)) {  in drbd_adm_connect()
2535 			if (nla_len(adm_ctx.peer_addr) == connection->peer_addr_len &&  in drbd_adm_connect()
2536 			    !memcmp(nla_data(adm_ctx.peer_addr), &connection->peer_addr,  in drbd_adm_connect()
2537 				    connection->peer_addr_len)) {  in drbd_adm_connect()
2545 	connection = first_connection(adm_ctx.resource);  in drbd_adm_connect()
2546 	conn_reconfig_start(connection);  in drbd_adm_connect()
2548 	if (connection->cstate > C_STANDALONE) {  in drbd_adm_connect()
2569 	retcode = check_net_options(connection, new_net_conf);  in drbd_adm_connect()
2579 	drbd_flush_workqueue(&connection->sender_work);  in drbd_adm_connect()
2582 	old_net_conf = connection->net_conf;  in drbd_adm_connect()
2588 	rcu_assign_pointer(connection->net_conf, new_net_conf);  in drbd_adm_connect()
2590 	conn_free_crypto(connection);  in drbd_adm_connect()
2591 	connection->cram_hmac_tfm = crypto.cram_hmac_tfm;  in drbd_adm_connect()
2592 	connection->integrity_tfm = crypto.integrity_tfm;  in drbd_adm_connect()
2593 	connection->csums_tfm = crypto.csums_tfm;  in drbd_adm_connect()
2594 	connection->verify_tfm = crypto.verify_tfm;  in drbd_adm_connect()
2596 	connection->my_addr_len = nla_len(adm_ctx.my_addr);  in drbd_adm_connect()
2597 	memcpy(&connection->my_addr, nla_data(adm_ctx.my_addr), connection->my_addr_len);  in drbd_adm_connect()
2598 	connection->peer_addr_len = nla_len(adm_ctx.peer_addr);  in drbd_adm_connect()
2599 	memcpy(&connection->peer_addr, nla_data(adm_ctx.peer_addr), connection->peer_addr_len);  in drbd_adm_connect()
2601 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in drbd_adm_connect()
2605 	connection_to_info(&connection_info, connection);  in drbd_adm_connect()
2608 	notify_connection_state(NULL, 0, connection, &connection_info, NOTIFY_CREATE | flags);  in drbd_adm_connect()
2609 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in drbd_adm_connect()
2620 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in drbd_adm_connect()
2627 	rv = conn_request_state(connection, NS(conn, C_UNCONNECTED), CS_VERBOSE);  in drbd_adm_connect()
2629 	conn_reconfig_done(connection);  in drbd_adm_connect()
2638 	conn_reconfig_done(connection);  in drbd_adm_connect()
2645 static enum drbd_state_rv conn_try_disconnect(struct drbd_connection *connection, bool force)  in conn_try_disconnect()  argument
2651 	rv = conn_request_state(connection, NS(conn, C_DISCONNECTING),  in conn_try_disconnect()
2661 		rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING, pdsk, D_OUTDATED), 0);  in conn_try_disconnect()
2664 			rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), CS_VERBOSE);  in conn_try_disconnect()
2668 		spin_lock_irq(&connection->resource->req_lock);  in conn_try_disconnect()
2669 		cstate = connection->cstate;  in conn_try_disconnect()
2670 		spin_unlock_irq(&connection->resource->req_lock);  in conn_try_disconnect()
2674 		rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING,  in conn_try_disconnect()
2677 			rv = conn_request_state(connection, NS(conn, C_DISCONNECTING),  in conn_try_disconnect()
2691 		drbd_thread_stop(&connection->receiver);  in conn_try_disconnect()
2699 		rv2 = conn_request_state(connection, NS(conn, C_STANDALONE),  in conn_try_disconnect()
2702 			drbd_err(connection,  in conn_try_disconnect()
2715 	struct drbd_connection *connection;  in drbd_adm_disconnect()  local
2726 	connection = adm_ctx.connection;  in drbd_adm_disconnect()
2738 	rv = conn_try_disconnect(connection, parms.force_disconnect);  in drbd_adm_disconnect()
2758 		iass = test_bit(RESOLVE_CONFLICTS, &first_peer_device(device)->connection->flags);  in resync_after_online_grow()
2815 	if (rs.no_resync && first_peer_device(device)->connection->agreed_pro_version < 93) {  in drbd_adm_resize()
2965 	drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work);  in drbd_adm_invalidate()
3043 	drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work);  in drbd_adm_invalidate_peer()
3167 			tl_clear(first_peer_device(device)->connection);  in drbd_adm_resume_io()
3169 			tl_restart(first_peer_device(device)->connection, FAIL_FROZEN_DISK_IO);  in drbd_adm_resume_io()
3185 				    struct drbd_connection *connection,  in nla_put_drbd_cfg_context()  argument
3197 	if (connection) {  in nla_put_drbd_cfg_context()
3198 		if (connection->my_addr_len &&  in nla_put_drbd_cfg_context()
3199 		    nla_put(skb, T_ctx_my_addr, connection->my_addr_len, &connection->my_addr))  in nla_put_drbd_cfg_context()
3201 		if (connection->peer_addr_len &&  in nla_put_drbd_cfg_context()
3202 		    nla_put(skb, T_ctx_peer_addr, connection->peer_addr_len, &connection->peer_addr))  in nla_put_drbd_cfg_context()
3438 	struct drbd_connection *connection;  in drbd_adm_dump_connections()  local
3471 		for_each_connection_rcu(connection, resource)  in drbd_adm_dump_connections()
3472 			if (connection == (struct drbd_connection *)cb->args[2])  in drbd_adm_dump_connections()
3477 	connection = list_entry(&resource->connections, struct drbd_connection, connections);  in drbd_adm_dump_connections()
3480 	list_for_each_entry_continue_rcu(connection, &resource->connections, connections) {  in drbd_adm_dump_connections()
3481 		if (!has_net_conf(connection))  in drbd_adm_dump_connections()
3521 		err = nla_put_drbd_cfg_context(skb, resource, connection, NULL);  in drbd_adm_dump_connections()
3524 		net_conf = rcu_dereference(connection->net_conf);  in drbd_adm_dump_connections()
3530 		connection_to_info(&connection_info, connection);  in drbd_adm_dump_connections()
3534 		connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags);  in drbd_adm_dump_connections()
3538 		cb->args[2] = (long)connection;  in drbd_adm_dump_connections()
3644 		if (!has_net_conf(peer_device->connection))  in drbd_adm_dump_peer_devices()
3665 		err = nla_put_drbd_cfg_context(skb, device->resource, peer_device->connection, device);  in drbd_adm_dump_peer_devices()
3743 		nc = rcu_dereference(first_peer_device(device)->connection->net_conf);  in nla_put_status_info()
3923 			struct drbd_connection *connection;  in get_one_status()  local
3927 			connection = the_only_connection(resource);  in get_one_status()
3928 			if (nla_put_drbd_cfg_context(skb, resource, connection, NULL))  in get_one_status()
3930 			if (connection) {  in get_one_status()
3933 				nc = rcu_dereference(connection->net_conf);  in get_one_status()
4138 	    first_peer_device(device)->connection->agreed_pro_version >= 90 &&  in drbd_adm_new_c_uuid()
4207 	struct drbd_connection *connection;  in drbd_adm_new_resource()  local
4242 	connection = conn_create(adm_ctx.resource_name, &res_opts);  in drbd_adm_new_resource()
4245 	if (connection) {  in drbd_adm_new_resource()
4249 		resource_to_info(&resource_info, connection->resource);  in drbd_adm_new_resource()
4250 		notify_resource_state(NULL, 0, connection->resource,  in drbd_adm_new_resource()
4311 			if (!has_net_conf(peer_device->connection))  in drbd_adm_new_minor()
4323 			if (!has_net_conf(peer_device->connection))  in drbd_adm_new_minor()
4347 		struct drbd_connection *connection =  in adm_del_minor()  local
4356 		if (get_t_state(&connection->worker) == RUNNING)  in adm_del_minor()
4357 			drbd_flush_workqueue(&connection->sender_work);  in adm_del_minor()
4361 			if (!has_net_conf(peer_device->connection))  in adm_del_minor()
4396 	struct drbd_connection *connection;  in adm_del_resource()  local
4398 	for_each_connection(connection, resource) {  in adm_del_resource()
4399 		if (connection->cstate > C_STANDALONE)  in adm_del_resource()
4417 	list_for_each_entry(connection, &resource->connections, connections)  in adm_del_resource()
4418 		drbd_thread_stop(&connection->worker);  in adm_del_resource()
4428 	struct drbd_connection *connection;  in drbd_adm_down()  local
4442 	for_each_connection(connection, resource) {  in drbd_adm_down()
4445 		idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in drbd_adm_down()
4453 		retcode = conn_try_disconnect(connection, 0);  in drbd_adm_down()
4659 			     struct drbd_connection *connection,  in notify_connection_state()  argument
4683 	if (nla_put_drbd_cfg_context(skb, connection->resource, connection, NULL) ||  in notify_connection_state()
4688 	connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags);  in notify_connection_state()
4702 	drbd_err(connection, "Error %d while broadcasting event. Event seq:%u\n",  in notify_connection_state()
4734 	if (nla_put_drbd_cfg_context(skb, resource, peer_device->connection, peer_device->device) ||  in notify_peer_device_state()
4759 		   struct drbd_device *device, struct drbd_connection *connection,  in notify_helper()  argument
4762 	struct drbd_resource *resource = device ? device->resource : connection->resource;  in notify_helper()
4785 	if (nla_put_drbd_cfg_context(skb, resource, connection, device) ||  in notify_helper()