/* * Copyright (c) 2016 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * @brief * The data-path object representing receiveing the packet, i.e. it's for-us */ #include <vlib/vlib.h> #include <vnet/ip/ip.h> #include <vnet/dpo/receive_dpo.h> /** * @brief pool of all receive DPOs */ receive_dpo_t *receive_dpo_pool; int dpo_is_receive (const dpo_id_t *dpo) { return (dpo->dpoi_type == DPO_RECEIVE); } static receive_dpo_t * receive_dpo_alloc (void) { receive_dpo_t *rd; vlib_main_t *vm; u8 did_barrier_sync; dpo_pool_barrier_sync (vm, receive_dpo_pool, did_barrier_sync); pool_get_aligned(receive_dpo_pool, rd, CLIB_CACHE_LINE_BYTES); dpo_pool_barrier_release (vm, did_barrier_sync); clib_memset(rd, 0, sizeof(*rd)); return (rd); } static receive_dpo_t * receive_dpo_get_from_dpo (const dpo_id_t *dpo) { ASSERT(DPO_RECEIVE == dpo->dpoi_type); return (receive_dpo_get(dpo->dpoi_index)); } /* * receive_dpo_add_or_lock * * The next_hop address here is used for source address selection in the DP. * The local adj is added to an interface's receive prefix, the next-hop * passed here is the local prefix on the same interface. */ void receive_dpo_add_or_lock (dpo_proto_t proto, u32 sw_if_index, const ip46_address_t *nh_addr, dpo_id_t *dpo) { receive_dpo_t *rd; rd = receive_dpo_alloc(); rd->rd_sw_if_index = sw_if_index; if (NULL != nh_addr) { rd->rd_addr = *nh_addr; } dpo_set(dpo, DPO_RECEIVE, proto, (rd - receive_dpo_pool)); } static void receive_dpo_lock (dpo_id_t *dpo) { receive_dpo_t *rd; rd = receive_dpo_get_from_dpo(dpo); rd->rd_locks++; } static void receive_dpo_unlock (dpo_id_t *dpo) { receive_dpo_t *rd; rd = receive_dpo_get_from_dpo(dpo); rd->rd_locks--; if (0 == rd->rd_locks) { pool_put(receive_dpo_pool, rd); } } static u8* format_receive_dpo (u8 *s, va_list *ap) { CLIB_UNUSED(index_t index) = va_arg(*ap, index_t); CLIB_UNUSED(u32 indent) = va_arg(*ap, u32); vnet_main_t * vnm = vnet_get_main(); receive_dpo_t *rd; if (pool_is_free_index(receive_dpo_pool, index)) { return (format(s, "dpo-receive DELETED")); } rd = receive_dpo_get(index); if (~0 != rd->rd_sw_if_index) { return (format(s, "dpo-receive: %U on %U", format_ip46_address, &rd->rd_addr, IP46_TYPE_ANY, format_vnet_sw_interface_name, vnm, vnet_get_sw_interface(vnm, rd->rd_sw_if_index))); } else { return (format(s, "dpo-receive")); } } static void receive_dpo_mem_show (void) { fib_show_memory_usage("Receive", pool_elts(receive_dpo_pool), pool_len(receive_dpo_pool), sizeof(receive_dpo_t)); } const static dpo_vft_t receive_vft = { .dv_lock = receive_dpo_lock, .dv_unlock = receive_dpo_unlock, .dv_format = format_receive_dpo, .dv_mem_show = receive_dpo_mem_show, }; /** * @brief The per-protocol VLIB graph nodes that are assigned to a receive * object. * * this means that these graph nodes are ones from which a receive is the * parent object in the DPO-graph. */ const static char *const receive_ip4_nodes[] = { "ip4-receive", NULL, }; const static char *const receive_ip6_nodes[] = { "ip6-receive", NULL, }; const static char* const * const receive_nodes[DPO_PROTO_NUM] = { [DPO_PROTO_IP4] = receive_ip4_nodes, [DPO_PROTO_IP6] = receive_ip6_nodes, [DPO_PROTO_MPLS] = NULL, }; void receive_dpo_module_init (void) { dpo_register(DPO_RECEIVE, &receive_vft, receive_nodes); }