250 		     nla_len(adm_ctx->my_addr) > sizeof(adm_ctx->connection->my_addr)) ||  in drbd_adm_prepare()
252 		     nla_len(adm_ctx->peer_addr) > sizeof(adm_ctx->connection->peer_addr))) {  in drbd_adm_prepare()
292 			adm_ctx->connection = conn_get_by_addrs(nla_data(adm_ctx->my_addr),  in drbd_adm_prepare()
296 		if (!adm_ctx->connection) {  in drbd_adm_prepare()
324 			: adm_ctx->connection ? adm_ctx->connection->resource : NULL;  in drbd_adm_prepare()
380 	if (adm_ctx->connection) {  in drbd_post_doit()
381 		kref_put(&adm_ctx->connection->kref, &drbd_destroy_connection);  in drbd_post_doit()
382 		adm_ctx->connection = NULL;  in drbd_post_doit()
392 static void setup_khelper_env(struct drbd_connection *connection, char **envp)  in setup_khelper_env()  argument
397 	if (connection->my_addr_len == 0 || connection->peer_addr_len == 0)  in setup_khelper_env()
400 	switch (((struct sockaddr *)&connection->peer_addr)->sa_family) {  in setup_khelper_env()
404 			 &((struct sockaddr_in6 *)&connection->peer_addr)->sin6_addr);  in setup_khelper_env()
409 			 &((struct sockaddr_in *)&connection->peer_addr)->sin_addr);  in setup_khelper_env()
414 			 &((struct sockaddr_in *)&connection->peer_addr)->sin_addr);  in setup_khelper_env()
429 	struct drbd_connection *connection = first_peer_device(device)->connection;  in drbd_khelper()  local
433 	if (current == connection->worker.task)  in drbd_khelper()
434 		set_bit(CALLBACK_PENDING, &connection->flags);  in drbd_khelper()
437 	setup_khelper_env(connection, envp);  in drbd_khelper()
447 	notify_helper(NOTIFY_CALL, device, connection, cmd, 0);  in drbd_khelper()
460 	notify_helper(NOTIFY_RESPONSE, device, connection, cmd, ret);  in drbd_khelper()
462 	if (current == connection->worker.task)  in drbd_khelper()
463 		clear_bit(CALLBACK_PENDING, &connection->flags);  in drbd_khelper()
471 enum drbd_peer_state conn_khelper(struct drbd_connection *connection, char *cmd)  in conn_khelper()  argument
479 	char *resource_name = connection->resource->name;  in conn_khelper()
483 	setup_khelper_env(connection, envp);  in conn_khelper()
484 	conn_md_sync(connection);  in conn_khelper()
486 	drbd_info(connection, "helper command: %s %s %s\n", drbd_usermode_helper, cmd, resource_name);  in conn_khelper()
488 	notify_helper(NOTIFY_CALL, NULL, connection, cmd, 0);  in conn_khelper()
492 		drbd_warn(connection, "helper command: %s %s %s exit code %u (0x%x)\n",  in conn_khelper()
496 		drbd_info(connection, "helper command: %s %s %s exit code %u (0x%x)\n",  in conn_khelper()
500 	notify_helper(NOTIFY_RESPONSE, NULL, connection, cmd, ret);  in conn_khelper()
508 static enum drbd_fencing_p highest_fencing_policy(struct drbd_connection *connection)  in highest_fencing_policy()  argument
515 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {  in highest_fencing_policy()
534 bool conn_try_outdate_peer(struct drbd_connection *connection)  in conn_try_outdate_peer()  argument
536 	struct drbd_resource * const resource = connection->resource;  in conn_try_outdate_peer()
545 	if (connection->cstate >= C_WF_REPORT_PARAMS) {  in conn_try_outdate_peer()
546 		drbd_err(connection, "Expected cstate < C_WF_REPORT_PARAMS\n");  in conn_try_outdate_peer()
551 	connect_cnt = connection->connect_cnt;  in conn_try_outdate_peer()
554 	fp = highest_fencing_policy(connection);  in conn_try_outdate_peer()
557 		drbd_warn(connection, "Not fencing peer, I'm not even Consistent myself.\n");  in conn_try_outdate_peer()
559 		if (connection->cstate < C_WF_REPORT_PARAMS) {  in conn_try_outdate_peer()
560 			_conn_request_state(connection,  in conn_try_outdate_peer()
568 				_tl_restart(connection, CONNECTION_LOST_WHILE_PENDING);  in conn_try_outdate_peer()
584 	r = conn_khelper(connection, "fence-peer");  in conn_try_outdate_peer()
598 		if (conn_highest_disk(connection) == D_UP_TO_DATE) {  in conn_try_outdate_peer()
611 		drbd_warn(connection, "Peer is primary, outdating myself.\n");  in conn_try_outdate_peer()
619 			drbd_err(connection, "fence-peer() = 7 && fencing != Stonith !!!\n");  in conn_try_outdate_peer()
626 		drbd_err(connection, "fence-peer helper broken, returned %d\n", (r>>8)&0xff);  in conn_try_outdate_peer()
630 	drbd_info(connection, "fence-peer helper returned %d (%s)\n",  in conn_try_outdate_peer()
638 	if (connection->cstate < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &connection->flags)) {  in conn_try_outdate_peer()
639 		if (connection->connect_cnt != connect_cnt)  in conn_try_outdate_peer()
642 			drbd_info(connection, "Ignoring fence-peer exit code\n");  in conn_try_outdate_peer()
644 			_conn_request_state(connection, mask, val, CS_VERBOSE);  in conn_try_outdate_peer()
648 	return conn_highest_pdsk(connection) <= D_OUTDATED;  in conn_try_outdate_peer()
653 	struct drbd_connection *connection = (struct drbd_connection *)data;  in _try_outdate_peer_async()  local
655 	conn_try_outdate_peer(connection);  in _try_outdate_peer_async()
657 	kref_put(&connection->kref, drbd_destroy_connection);  in _try_outdate_peer_async()
661 void conn_try_outdate_peer_async(struct drbd_connection *connection)  in conn_try_outdate_peer_async()  argument
665 	kref_get(&connection->kref);  in conn_try_outdate_peer_async()
672 	opa = kthread_run(_try_outdate_peer_async, connection, "drbd_async_h");  in conn_try_outdate_peer_async()
674 		drbd_err(connection, "out of mem, failed to invoke fence-peer helper\n");  in conn_try_outdate_peer_async()
675 		kref_put(&connection->kref, drbd_destroy_connection);  in conn_try_outdate_peer_async()
683 	struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL;  in drbd_set_role()  local
692 		struct drbd_connection *connection;  in drbd_set_role()  local
697 		for_each_connection(connection, device->resource)  in drbd_set_role()
698 			request_ping(connection);  in drbd_set_role()
731 			if (conn_try_outdate_peer(connection)) {  in drbd_set_role()
741 			if (!conn_try_outdate_peer(connection) && force) {  in drbd_set_role()
756 				nc = rcu_dereference(connection->net_conf);  in drbd_set_role()
790 		nc = connection->net_conf;  in drbd_set_role()
1265 	if (first_peer_device(device)->connection->agreed_pro_version < 94)  in drbd_max_peer_bio_size()
1272 	if (first_peer_device(device)->connection->agreed_pro_version == 94)  in drbd_max_peer_bio_size()
1278 	if (first_peer_device(device)->connection->agreed_pro_version < 100)  in drbd_max_peer_bio_size()
1283 static unsigned int drbd_max_discard_sectors(struct drbd_connection *connection)  in drbd_max_discard_sectors()  argument
1287 	if (connection->agreed_features & DRBD_FF_WSAME)  in drbd_max_discard_sectors()
1293 static bool drbd_discard_supported(struct drbd_connection *connection,  in drbd_discard_supported()  argument
1299 	if (connection->cstate >= C_CONNECTED &&  in drbd_discard_supported()
1300 	    !(connection->agreed_features & DRBD_FF_TRIM)) {  in drbd_discard_supported()
1301 		drbd_info(connection,  in drbd_discard_supported()
1326 	struct drbd_connection *connection =  in drbd_reconsider_queue_parameters()  local
1327 		first_peer_device(device)->connection;  in drbd_reconsider_queue_parameters()
1378 	if (drbd_discard_supported(connection, bdev)) {  in drbd_reconsider_queue_parameters()
1381 			drbd_max_discard_sectors(connection);  in drbd_reconsider_queue_parameters()
1411 	if (connection->agreed_features & DRBD_FF_WZEROES)  in drbd_reconsider_queue_parameters()
1428 static void conn_reconfig_start(struct drbd_connection *connection)  in conn_reconfig_start()  argument
1430 	drbd_thread_start(&connection->worker);  in conn_reconfig_start()
1431 	drbd_flush_workqueue(&connection->sender_work);  in conn_reconfig_start()
1435 static void conn_reconfig_done(struct drbd_connection *connection)  in conn_reconfig_done()  argument
1438 	spin_lock_irq(&connection->resource->req_lock);  in conn_reconfig_done()
1439 	stop_threads = conn_all_vols_unconf(connection) &&  in conn_reconfig_done()
1440 		connection->cstate == C_STANDALONE;  in conn_reconfig_done()
1441 	spin_unlock_irq(&connection->resource->req_lock);  in conn_reconfig_done()
1445 		drbd_thread_stop(&connection->receiver);  in conn_reconfig_done()
1446 		drbd_thread_stop(&connection->worker);  in conn_reconfig_done()
1804 	struct drbd_connection *connection;  in drbd_adm_attach()  local
1827 	connection = peer_device->connection;  in drbd_adm_attach()
1828 	conn_reconfig_start(connection);  in drbd_adm_attach()
1889 	nc = rcu_dereference(connection->net_conf);  in drbd_adm_attach()
1979 	drbd_flush_workqueue(&connection->sender_work);  in drbd_adm_attach()
2196 	conn_reconfig_done(connection);  in drbd_adm_attach()
2207 	conn_reconfig_done(connection);  in drbd_adm_attach()
2269 static bool conn_resync_running(struct drbd_connection *connection)  in conn_resync_running()  argument
2276 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {  in conn_resync_running()
2291 static bool conn_ov_running(struct drbd_connection *connection)  in conn_ov_running()  argument
2298 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {  in conn_ov_running()
2312 _check_net_options(struct drbd_connection *connection, struct net_conf *old_net_conf, struct net_co…  in _check_net_options()  argument
2317 …if (old_net_conf && connection->cstate == C_WF_REPORT_PARAMS && connection->agreed_pro_version < 1…  in _check_net_options()
2329 	    conn_highest_role(connection) == R_PRIMARY &&  in _check_net_options()
2330 	    conn_highest_peer(connection) == R_PRIMARY)  in _check_net_options()
2337 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in _check_net_options()
2356 check_net_options(struct drbd_connection *connection, struct net_conf *new_net_conf)  in check_net_options()  argument
2363 	rv = _check_net_options(connection, rcu_dereference(connection->net_conf), new_net_conf);  in check_net_options()
2367 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in check_net_options()
2441 	struct drbd_connection *connection;  in drbd_adm_net_opts()  local
2454 	connection = adm_ctx->connection;  in drbd_adm_net_opts()
2463 	conn_reconfig_start(connection);  in drbd_adm_net_opts()
2465 	mutex_lock(&connection->data.mutex);  in drbd_adm_net_opts()
2466 	mutex_lock(&connection->resource->conf_update);  in drbd_adm_net_opts()
2467 	old_net_conf = connection->net_conf;  in drbd_adm_net_opts()
2486 	retcode = check_net_options(connection, new_net_conf);  in drbd_adm_net_opts()
2491 	rsr = conn_resync_running(connection);  in drbd_adm_net_opts()
2498 	ovr = conn_ov_running(connection);  in drbd_adm_net_opts()
2508 	rcu_assign_pointer(connection->net_conf, new_net_conf);  in drbd_adm_net_opts()
2511 		crypto_free_shash(connection->csums_tfm);  in drbd_adm_net_opts()
2512 		connection->csums_tfm = crypto.csums_tfm;  in drbd_adm_net_opts()
2516 		crypto_free_shash(connection->verify_tfm);  in drbd_adm_net_opts()
2517 		connection->verify_tfm = crypto.verify_tfm;  in drbd_adm_net_opts()
2521 	crypto_free_shash(connection->integrity_tfm);  in drbd_adm_net_opts()
2522 	connection->integrity_tfm = crypto.integrity_tfm;  in drbd_adm_net_opts()
2523 	if (connection->cstate >= C_WF_REPORT_PARAMS && connection->agreed_pro_version >= 100)  in drbd_adm_net_opts()
2525 		__drbd_send_protocol(connection, P_PROTOCOL_UPDATE);  in drbd_adm_net_opts()
2527 	crypto_free_shash(connection->cram_hmac_tfm);  in drbd_adm_net_opts()
2528 	connection->cram_hmac_tfm = crypto.cram_hmac_tfm;  in drbd_adm_net_opts()
2530 	mutex_unlock(&connection->resource->conf_update);  in drbd_adm_net_opts()
2531 	mutex_unlock(&connection->data.mutex);  in drbd_adm_net_opts()
2534 	if (connection->cstate >= C_WF_REPORT_PARAMS) {  in drbd_adm_net_opts()
2538 		idr_for_each_entry(&connection->peer_devices, peer_device, vnr)  in drbd_adm_net_opts()
2545 	mutex_unlock(&connection->resource->conf_update);  in drbd_adm_net_opts()
2546 	mutex_unlock(&connection->data.mutex);  in drbd_adm_net_opts()
2550 	conn_reconfig_done(connection);  in drbd_adm_net_opts()
2559 			       struct drbd_connection *connection)  in connection_to_info()  argument
2561 	info->conn_connection_state = connection->cstate;  in connection_to_info()
2562 	info->conn_role = conn_highest_peer(connection);  in connection_to_info()
2588 	struct drbd_connection *connection;  in drbd_adm_connect()  local
2609 		for_each_connection(connection, resource) {  in drbd_adm_connect()
2610 			if (nla_len(adm_ctx->my_addr) == connection->my_addr_len &&  in drbd_adm_connect()
2611 			    !memcmp(nla_data(adm_ctx->my_addr), &connection->my_addr,  in drbd_adm_connect()
2612 				    connection->my_addr_len)) {  in drbd_adm_connect()
2617 			if (nla_len(adm_ctx->peer_addr) == connection->peer_addr_len &&  in drbd_adm_connect()
2618 			    !memcmp(nla_data(adm_ctx->peer_addr), &connection->peer_addr,  in drbd_adm_connect()
2619 				    connection->peer_addr_len)) {  in drbd_adm_connect()
2627 	connection = first_connection(adm_ctx->resource);  in drbd_adm_connect()
2628 	conn_reconfig_start(connection);  in drbd_adm_connect()
2630 	if (connection->cstate > C_STANDALONE) {  in drbd_adm_connect()
2651 	retcode = check_net_options(connection, new_net_conf);  in drbd_adm_connect()
2661 	drbd_flush_workqueue(&connection->sender_work);  in drbd_adm_connect()
2664 	old_net_conf = connection->net_conf;  in drbd_adm_connect()
2670 	rcu_assign_pointer(connection->net_conf, new_net_conf);  in drbd_adm_connect()
2672 	conn_free_crypto(connection);  in drbd_adm_connect()
2673 	connection->cram_hmac_tfm = crypto.cram_hmac_tfm;  in drbd_adm_connect()
2674 	connection->integrity_tfm = crypto.integrity_tfm;  in drbd_adm_connect()
2675 	connection->csums_tfm = crypto.csums_tfm;  in drbd_adm_connect()
2676 	connection->verify_tfm = crypto.verify_tfm;  in drbd_adm_connect()
2678 	connection->my_addr_len = nla_len(adm_ctx->my_addr);  in drbd_adm_connect()
2679 	memcpy(&connection->my_addr, nla_data(adm_ctx->my_addr), connection->my_addr_len);  in drbd_adm_connect()
2680 	connection->peer_addr_len = nla_len(adm_ctx->peer_addr);  in drbd_adm_connect()
2681 	memcpy(&connection->peer_addr, nla_data(adm_ctx->peer_addr), connection->peer_addr_len);  in drbd_adm_connect()
2683 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in drbd_adm_connect()
2687 	connection_to_info(&connection_info, connection);  in drbd_adm_connect()
2690 	notify_connection_state(NULL, 0, connection, &connection_info, NOTIFY_CREATE | flags);  in drbd_adm_connect()
2691 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in drbd_adm_connect()
2702 	idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in drbd_adm_connect()
2709 	rv = conn_request_state(connection, NS(conn, C_UNCONNECTED), CS_VERBOSE);  in drbd_adm_connect()
2711 	conn_reconfig_done(connection);  in drbd_adm_connect()
2720 	conn_reconfig_done(connection);  in drbd_adm_connect()
2727 static enum drbd_state_rv conn_try_disconnect(struct drbd_connection *connection, bool force)  in conn_try_disconnect()  argument
2733 	rv = conn_request_state(connection, NS(conn, C_DISCONNECTING),  in conn_try_disconnect()
2743 		rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING, pdsk, D_OUTDATED), 0);  in conn_try_disconnect()
2746 			rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), CS_VERBOSE);  in conn_try_disconnect()
2750 		spin_lock_irq(&connection->resource->req_lock);  in conn_try_disconnect()
2751 		cstate = connection->cstate;  in conn_try_disconnect()
2752 		spin_unlock_irq(&connection->resource->req_lock);  in conn_try_disconnect()
2756 		rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING,  in conn_try_disconnect()
2759 			rv = conn_request_state(connection, NS(conn, C_DISCONNECTING),  in conn_try_disconnect()
2773 		drbd_thread_stop(&connection->receiver);  in conn_try_disconnect()
2781 		rv2 = conn_request_state(connection, NS(conn, C_STANDALONE),  in conn_try_disconnect()
2784 			drbd_err(connection,  in conn_try_disconnect()
2797 	struct drbd_connection *connection;  in drbd_adm_disconnect()  local
2808 	connection = adm_ctx->connection;  in drbd_adm_disconnect()
2820 	rv = conn_try_disconnect(connection, parms.force_disconnect);  in drbd_adm_disconnect()
2840 		iass = test_bit(RESOLVE_CONFLICTS, &first_peer_device(device)->connection->flags);  in resync_after_online_grow()
2897 	if (rs.no_resync && first_peer_device(device)->connection->agreed_pro_version < 93) {  in drbd_adm_resize()
3047 	drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work);  in drbd_adm_invalidate()
3125 	drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work);  in drbd_adm_invalidate_peer()
3249 			tl_clear(first_peer_device(device)->connection);  in drbd_adm_resume_io()
3251 			tl_restart(first_peer_device(device)->connection, FAIL_FROZEN_DISK_IO);  in drbd_adm_resume_io()
3267 				    struct drbd_connection *connection,  in nla_put_drbd_cfg_context()  argument
3279 	if (connection) {  in nla_put_drbd_cfg_context()
3280 		if (connection->my_addr_len &&  in nla_put_drbd_cfg_context()
3281 		    nla_put(skb, T_ctx_my_addr, connection->my_addr_len, &connection->my_addr))  in nla_put_drbd_cfg_context()
3283 		if (connection->peer_addr_len &&  in nla_put_drbd_cfg_context()
3284 		    nla_put(skb, T_ctx_peer_addr, connection->peer_addr_len, &connection->peer_addr))  in nla_put_drbd_cfg_context()
3521 	struct drbd_connection *connection;  in drbd_adm_dump_connections()  local
3554 		for_each_connection_rcu(connection, resource)  in drbd_adm_dump_connections()
3555 			if (connection == (struct drbd_connection *)cb->args[2])  in drbd_adm_dump_connections()
3560 	connection = list_entry(&resource->connections, struct drbd_connection, connections);  in drbd_adm_dump_connections()
3563 	list_for_each_entry_continue_rcu(connection, &resource->connections, connections) {  in drbd_adm_dump_connections()
3564 		if (!has_net_conf(connection))  in drbd_adm_dump_connections()
3604 		err = nla_put_drbd_cfg_context(skb, resource, connection, NULL);  in drbd_adm_dump_connections()
3607 		net_conf = rcu_dereference(connection->net_conf);  in drbd_adm_dump_connections()
3613 		connection_to_info(&connection_info, connection);  in drbd_adm_dump_connections()
3617 		connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags);  in drbd_adm_dump_connections()
3621 		cb->args[2] = (long)connection;  in drbd_adm_dump_connections()
3729 		if (!has_net_conf(peer_device->connection))  in drbd_adm_dump_peer_devices()
3750 		err = nla_put_drbd_cfg_context(skb, device->resource, peer_device->connection, device);  in drbd_adm_dump_peer_devices()
3828 		nc = rcu_dereference(first_peer_device(device)->connection->net_conf);  in nla_put_status_info()
4009 			struct drbd_connection *connection;  in get_one_status()  local
4013 			connection = the_only_connection(resource);  in get_one_status()
4014 			if (nla_put_drbd_cfg_context(skb, resource, connection, NULL))  in get_one_status()
4016 			if (connection) {  in get_one_status()
4019 				nc = rcu_dereference(connection->net_conf);  in get_one_status()
4221 	    first_peer_device(device)->connection->agreed_pro_version >= 90 &&  in drbd_adm_new_c_uuid()
4290 	struct drbd_connection *connection;  in drbd_adm_new_resource()  local
4325 	connection = conn_create(adm_ctx->resource_name, &res_opts);  in drbd_adm_new_resource()
4328 	if (connection) {  in drbd_adm_new_resource()
4332 		resource_to_info(&resource_info, connection->resource);  in drbd_adm_new_resource()
4333 		notify_resource_state(NULL, 0, connection->resource,  in drbd_adm_new_resource()
4394 			if (!has_net_conf(peer_device->connection))  in drbd_adm_new_minor()
4406 			if (!has_net_conf(peer_device->connection))  in drbd_adm_new_minor()
4430 		struct drbd_connection *connection =  in adm_del_minor()  local
4439 		if (get_t_state(&connection->worker) == RUNNING)  in adm_del_minor()
4440 			drbd_flush_workqueue(&connection->sender_work);  in adm_del_minor()
4444 			if (!has_net_conf(peer_device->connection))  in adm_del_minor()
4479 	struct drbd_connection *connection;  in adm_del_resource()  local
4481 	for_each_connection(connection, resource) {  in adm_del_resource()
4482 		if (connection->cstate > C_STANDALONE)  in adm_del_resource()
4500 	list_for_each_entry(connection, &resource->connections, connections)  in adm_del_resource()
4501 		drbd_thread_stop(&connection->worker);  in adm_del_resource()
4511 	struct drbd_connection *connection;  in drbd_adm_down()  local
4525 	for_each_connection(connection, resource) {  in drbd_adm_down()
4528 		idr_for_each_entry(&connection->peer_devices, peer_device, i) {  in drbd_adm_down()
4536 		retcode = conn_try_disconnect(connection, 0);  in drbd_adm_down()
4742 			     struct drbd_connection *connection,  in notify_connection_state()  argument
4766 	if (nla_put_drbd_cfg_context(skb, connection->resource, connection, NULL) ||  in notify_connection_state()
4771 	connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags);  in notify_connection_state()
4785 	drbd_err(connection, "Error %d while broadcasting event. Event seq:%u\n",  in notify_connection_state()
4817 	if (nla_put_drbd_cfg_context(skb, resource, peer_device->connection, peer_device->device) ||  in notify_peer_device_state()
4842 		   struct drbd_device *device, struct drbd_connection *connection,  in notify_helper()  argument
4845 	struct drbd_resource *resource = device ? device->resource : connection->resource;  in notify_helper()
4868 	if (nla_put_drbd_cfg_context(skb, resource, connection, device) ||  in notify_helper()