472 	struct drbd_peer_device *peer_device;  in conn_lowest_minor()  local
476 	peer_device = idr_get_next(&connection->peer_devices, &vnr);  in conn_lowest_minor()
477 	if (peer_device)  in conn_lowest_minor()
478 		minor = device_to_minor(peer_device->device);  in conn_lowest_minor()
622 void *drbd_prepare_command(struct drbd_peer_device *peer_device, struct drbd_socket *sock)  in drbd_prepare_command()  argument
624 	return conn_prepare_command(peer_device->connection, sock);  in drbd_prepare_command()
676 int drbd_send_command(struct drbd_peer_device *peer_device, struct drbd_socket *sock,  in drbd_send_command()  argument
682 	err = __send_command(peer_device->connection, peer_device->device->vnr,  in drbd_send_command()
708 int drbd_send_sync_param(struct drbd_peer_device *peer_device)  in drbd_send_sync_param()  argument
713 	const int apv = peer_device->connection->agreed_pro_version;  in drbd_send_sync_param()
718 	sock = &peer_device->connection->data;  in drbd_send_sync_param()
719 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_sync_param()
724 	nc = rcu_dereference(peer_device->connection->net_conf);  in drbd_send_sync_param()
738 	if (get_ldev(peer_device->device)) {  in drbd_send_sync_param()
739 		dc = rcu_dereference(peer_device->device->ldev->disk_conf);  in drbd_send_sync_param()
745 		put_ldev(peer_device->device);  in drbd_send_sync_param()
760 	return drbd_send_command(peer_device, sock, cmd, size, NULL, 0);  in drbd_send_sync_param()
818 static int _drbd_send_uuids(struct drbd_peer_device *peer_device, u64 uuid_flags)  in _drbd_send_uuids()  argument
820 	struct drbd_device *device = peer_device->device;  in _drbd_send_uuids()
828 	sock = &peer_device->connection->data;  in _drbd_send_uuids()
829 	p = drbd_prepare_command(peer_device, sock);  in _drbd_send_uuids()
842 	uuid_flags |= rcu_dereference(peer_device->connection->net_conf)->discard_my_data ? 1 : 0;  in _drbd_send_uuids()
849 	return drbd_send_command(peer_device, sock, P_UUIDS, sizeof(*p), NULL, 0);  in _drbd_send_uuids()
852 int drbd_send_uuids(struct drbd_peer_device *peer_device)  in drbd_send_uuids()  argument
854 	return _drbd_send_uuids(peer_device, 0);  in drbd_send_uuids()
857 int drbd_send_uuids_skip_initial_sync(struct drbd_peer_device *peer_device)  in drbd_send_uuids_skip_initial_sync()  argument
859 	return _drbd_send_uuids(peer_device, 8);  in drbd_send_uuids_skip_initial_sync()
880 void drbd_gen_and_send_sync_uuid(struct drbd_peer_device *peer_device)  in drbd_gen_and_send_sync_uuid()  argument
882 	struct drbd_device *device = peer_device->device;  in drbd_gen_and_send_sync_uuid()
898 	sock = &peer_device->connection->data;  in drbd_gen_and_send_sync_uuid()
899 	p = drbd_prepare_command(peer_device, sock);  in drbd_gen_and_send_sync_uuid()
902 		drbd_send_command(peer_device, sock, P_SYNC_UUID, sizeof(*p), NULL, 0);  in drbd_gen_and_send_sync_uuid()
906 int drbd_send_sizes(struct drbd_peer_device *peer_device, int trigger_reply, enum dds_flags flags)  in drbd_send_sizes()  argument
908 	struct drbd_device *device = peer_device->device;  in drbd_send_sizes()
916 	sock = &peer_device->connection->data;  in drbd_send_sizes()
917 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_sizes()
922 	if (peer_device->connection->agreed_features & DRBD_FF_WSAME)  in drbd_send_sizes()
965 	if (peer_device->connection->agreed_pro_version <= 94)  in drbd_send_sizes()
967 	else if (peer_device->connection->agreed_pro_version < 100)  in drbd_send_sizes()
980 	return drbd_send_command(peer_device, sock, P_SIZES, packet_size, NULL, 0);  in drbd_send_sizes()
987 int drbd_send_current_state(struct drbd_peer_device *peer_device)  in drbd_send_current_state()  argument
992 	sock = &peer_device->connection->data;  in drbd_send_current_state()
993 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_current_state()
996 	p->state = cpu_to_be32(peer_device->device->state.i); /* Within the send mutex */  in drbd_send_current_state()
997 	return drbd_send_command(peer_device, sock, P_STATE, sizeof(*p), NULL, 0);  in drbd_send_current_state()
1010 int drbd_send_state(struct drbd_peer_device *peer_device, union drbd_state state)  in drbd_send_state()  argument
1015 	sock = &peer_device->connection->data;  in drbd_send_state()
1016 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_state()
1020 	return drbd_send_command(peer_device, sock, P_STATE, sizeof(*p), NULL, 0);  in drbd_send_state()
1023 int drbd_send_state_req(struct drbd_peer_device *peer_device, union drbd_state mask, union drbd_sta…  in drbd_send_state_req()  argument
1028 	sock = &peer_device->connection->data;  in drbd_send_state_req()
1029 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_state_req()
1034 	return drbd_send_command(peer_device, sock, P_STATE_CHG_REQ, sizeof(*p), NULL, 0);  in drbd_send_state_req()
1053 void drbd_send_sr_reply(struct drbd_peer_device *peer_device, enum drbd_state_rv retcode)  in drbd_send_sr_reply()  argument
1058 	sock = &peer_device->connection->meta;  in drbd_send_sr_reply()
1059 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_sr_reply()
1062 		drbd_send_command(peer_device, sock, P_STATE_CHG_REPLY, sizeof(*p), NULL, 0);  in drbd_send_sr_reply()
1331 static int _drbd_send_ack(struct drbd_peer_device *peer_device, enum drbd_packet cmd,  in _drbd_send_ack()  argument
1337 	if (peer_device->device->state.conn < C_CONNECTED)  in _drbd_send_ack()
1340 	sock = &peer_device->connection->meta;  in _drbd_send_ack()
1341 	p = drbd_prepare_command(peer_device, sock);  in _drbd_send_ack()
1347 	p->seq_num = cpu_to_be32(atomic_inc_return(&peer_device->device->packet_seq));  in _drbd_send_ack()
1348 	return drbd_send_command(peer_device, sock, cmd, sizeof(*p), NULL, 0);  in _drbd_send_ack()
1354 void drbd_send_ack_dp(struct drbd_peer_device *peer_device, enum drbd_packet cmd,  in drbd_send_ack_dp()  argument
1357 	if (peer_device->connection->peer_integrity_tfm)  in drbd_send_ack_dp()
1358 		data_size -= crypto_shash_digestsize(peer_device->connection->peer_integrity_tfm);  in drbd_send_ack_dp()
1359 	_drbd_send_ack(peer_device, cmd, dp->sector, cpu_to_be32(data_size),  in drbd_send_ack_dp()
1363 void drbd_send_ack_rp(struct drbd_peer_device *peer_device, enum drbd_packet cmd,  in drbd_send_ack_rp()  argument
1366 	_drbd_send_ack(peer_device, cmd, rp->sector, rp->blksize, rp->block_id);  in drbd_send_ack_rp()
1375 int drbd_send_ack(struct drbd_peer_device *peer_device, enum drbd_packet cmd,  in drbd_send_ack()  argument
1378 	return _drbd_send_ack(peer_device, cmd,  in drbd_send_ack()
1386 int drbd_send_ack_ex(struct drbd_peer_device *peer_device, enum drbd_packet cmd,  in drbd_send_ack_ex()  argument
1389 	return _drbd_send_ack(peer_device, cmd,  in drbd_send_ack_ex()
1395 int drbd_send_rs_deallocated(struct drbd_peer_device *peer_device,  in drbd_send_rs_deallocated()  argument
1401 	sock = &peer_device->connection->data;  in drbd_send_rs_deallocated()
1402 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_rs_deallocated()
1408 	return drbd_send_command(peer_device, sock, P_RS_DEALLOCATED, sizeof(*p), NULL, 0);  in drbd_send_rs_deallocated()
1411 int drbd_send_drequest(struct drbd_peer_device *peer_device, int cmd,  in drbd_send_drequest()  argument
1417 	sock = &peer_device->connection->data;  in drbd_send_drequest()
1418 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_drequest()
1424 	return drbd_send_command(peer_device, sock, cmd, sizeof(*p), NULL, 0);  in drbd_send_drequest()
1427 int drbd_send_drequest_csum(struct drbd_peer_device *peer_device, sector_t sector, int size,  in drbd_send_drequest_csum()  argument
1435 	sock = &peer_device->connection->data;  in drbd_send_drequest_csum()
1436 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_drequest_csum()
1442 	return drbd_send_command(peer_device, sock, cmd, sizeof(*p), digest, digest_size);  in drbd_send_drequest_csum()
1445 int drbd_send_ov_request(struct drbd_peer_device *peer_device, sector_t sector, int size)  in drbd_send_ov_request()  argument
1450 	sock = &peer_device->connection->data;  in drbd_send_ov_request()
1451 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_ov_request()
1457 	return drbd_send_command(peer_device, sock, P_OV_REQUEST, sizeof(*p), NULL, 0);  in drbd_send_ov_request()
1515 static int _drbd_no_send_page(struct drbd_peer_device *peer_device, struct page *page,  in _drbd_no_send_page()  argument
1522 	socket = peer_device->connection->data.socket;  in _drbd_no_send_page()
1524 	err = drbd_send_all(peer_device->connection, socket, addr, size, msg_flags);  in _drbd_no_send_page()
1527 		peer_device->device->send_cnt += size >> 9;  in _drbd_no_send_page()
1531 static int _drbd_send_page(struct drbd_peer_device *peer_device, struct page *page,  in _drbd_send_page()  argument
1534 	struct socket *socket = peer_device->connection->data.socket;  in _drbd_send_page()
1545 		return _drbd_no_send_page(peer_device, page, offset, size, msg_flags);  in _drbd_send_page()
1548 	drbd_update_congested(peer_device->connection);  in _drbd_send_page()
1555 				if (we_should_drop_the_connection(peer_device->connection, socket))  in _drbd_send_page()
1559 			drbd_warn(peer_device->device, "%s: size=%d len=%d sent=%d\n",  in _drbd_send_page()
1568 	clear_bit(NET_CONGESTED, &peer_device->connection->flags);  in _drbd_send_page()
1572 		peer_device->device->send_cnt += size >> 9;  in _drbd_send_page()
1577 static int _drbd_send_bio(struct drbd_peer_device *peer_device, struct bio *bio)  in _drbd_send_bio()  argument
1586 		err = _drbd_no_send_page(peer_device, bvec.bv_page,  in _drbd_send_bio()
1596 static int _drbd_send_zc_bio(struct drbd_peer_device *peer_device, struct bio *bio)  in _drbd_send_zc_bio()  argument
1605 		err = _drbd_send_page(peer_device, bvec.bv_page,  in _drbd_send_zc_bio()
1614 static int _drbd_send_zc_ee(struct drbd_peer_device *peer_device,  in _drbd_send_zc_ee()  argument
1625 		err = _drbd_send_page(peer_device, page, 0, l,  in _drbd_send_zc_ee()
1654 int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request *req)  in drbd_send_dblock()  argument
1656 	struct drbd_device *device = peer_device->device;  in drbd_send_dblock()
1664 	sock = &peer_device->connection->data;  in drbd_send_dblock()
1665 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_dblock()
1666 	digest_size = peer_device->connection->integrity_tfm ?  in drbd_send_dblock()
1667 		      crypto_shash_digestsize(peer_device->connection->integrity_tfm) : 0;  in drbd_send_dblock()
1674 	dp_flags = bio_flags_to_wire(peer_device->connection, req->master_bio);  in drbd_send_dblock()
1678 	if (peer_device->connection->agreed_pro_version >= 100) {  in drbd_send_dblock()
1693 		err = __send_command(peer_device->connection, device->vnr, sock, cmd, sizeof(*t), NULL, 0);  in drbd_send_dblock()
1701 		drbd_csum_bio(peer_device->connection->integrity_tfm, req->master_bio, digest_out);  in drbd_send_dblock()
1702 	err = __send_command(peer_device->connection, device->vnr, sock, P_DATA,  in drbd_send_dblock()
1717 			err = _drbd_send_bio(peer_device, req->master_bio);  in drbd_send_dblock()
1719 			err = _drbd_send_zc_bio(peer_device, req->master_bio);  in drbd_send_dblock()
1726 			drbd_csum_bio(peer_device->connection->integrity_tfm, req->master_bio, digest);  in drbd_send_dblock()
1746 int drbd_send_block(struct drbd_peer_device *peer_device, enum drbd_packet cmd,  in drbd_send_block()  argument
1749 	struct drbd_device *device = peer_device->device;  in drbd_send_block()
1755 	sock = &peer_device->connection->data;  in drbd_send_block()
1756 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_block()
1758 	digest_size = peer_device->connection->integrity_tfm ?  in drbd_send_block()
1759 		      crypto_shash_digestsize(peer_device->connection->integrity_tfm) : 0;  in drbd_send_block()
1768 		drbd_csum_ee(peer_device->connection->integrity_tfm, peer_req, p + 1);  in drbd_send_block()
1769 …err = __send_command(peer_device->connection, device->vnr, sock, cmd, sizeof(*p) + digest_size, NU…  in drbd_send_block()
1771 		err = _drbd_send_zc_ee(peer_device, peer_req);  in drbd_send_block()
1777 int drbd_send_out_of_sync(struct drbd_peer_device *peer_device, struct drbd_request *req)  in drbd_send_out_of_sync()  argument
1782 	sock = &peer_device->connection->data;  in drbd_send_out_of_sync()
1783 	p = drbd_prepare_command(peer_device, sock);  in drbd_send_out_of_sync()
1788 	return drbd_send_command(peer_device, sock, P_OUT_OF_SYNC, sizeof(*p), NULL, 0);  in drbd_send_out_of_sync()
2185 	struct drbd_peer_device *peer_device, *tmp_peer_device;  in drbd_destroy_device()  local
2216 	for_each_peer_device_safe(peer_device, tmp_peer_device, device) {  in drbd_destroy_device()
2217 		kref_put(&peer_device->connection->kref, drbd_destroy_connection);  in drbd_destroy_device()
2218 		kfree(peer_device);  in drbd_destroy_device()
2677 	struct drbd_peer_device *peer_device, *tmp_peer_device;  in drbd_create_device()  local
2751 		peer_device = kzalloc(sizeof(struct drbd_peer_device), GFP_KERNEL);  in drbd_create_device()
2752 		if (!peer_device)  in drbd_create_device()
2754 		peer_device->connection = connection;  in drbd_create_device()
2755 		peer_device->device = device;  in drbd_create_device()
2757 		list_add(&peer_device->peer_devices, &device->peer_devices);  in drbd_create_device()
2760 		id = idr_alloc(&connection->peer_devices, peer_device, vnr, vnr + 1, GFP_KERNEL);  in drbd_create_device()
2767 		INIT_WORK(&peer_device->send_acks_work, drbd_send_acks_wf);  in drbd_create_device()
2782 		for_each_peer_device(peer_device, device)  in drbd_create_device()
2783 			drbd_connected(peer_device);  in drbd_create_device()
2786 	for_each_peer_device(peer_device, device)  in drbd_create_device()
2787 		drbd_debugfs_peer_device_add(peer_device);  in drbd_create_device()
2793 		peer_device = idr_remove(&connection->peer_devices, vnr);  in drbd_create_device()
2794 		if (peer_device)  in drbd_create_device()
2797 	for_each_peer_device_safe(peer_device, tmp_peer_device, device) {  in drbd_create_device()
2798 		list_del(&peer_device->peer_devices);  in drbd_create_device()
2799 		kfree(peer_device);  in drbd_create_device()
2821 	struct drbd_peer_device *peer_device;  in drbd_delete_device()  local
2824 	for_each_peer_device(peer_device, device)  in drbd_delete_device()
2825 		drbd_debugfs_peer_device_cleanup(peer_device);  in drbd_delete_device()
2942 	struct drbd_peer_device *peer_device;  in conn_md_sync()  local
2946 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {  in conn_md_sync()
2947 		struct drbd_device *device = peer_device->device;  in conn_md_sync()