/* * 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. */ #include #include #include /* * The 'DB' of L2 bridge DPOs. * There is only one per-interface, so this is a per-interface vector */ static index_t *l2_bridge_dpo_db; static l2_bridge_dpo_t * l2_bridge_dpo_alloc (void) { l2_bridge_dpo_t *l2b; pool_get(l2_bridge_dpo_pool, l2b); return (l2b); } static inline l2_bridge_dpo_t * l2_bridge_dpo_get_from_dpo (const dpo_id_t *dpo) { ASSERT(DPO_L2_BRIDGE == dpo->dpoi_type); return (l2_bridge_dpo_get(dpo->dpoi_index)); } static inline index_t l2_bridge_dpo_get_index (l2_bridge_dpo_t *l2b) { return (l2b - l2_bridge_dpo_pool); } static void l2_bridge_dpo_lock (dpo_id_t *dpo) { l2_bridge_dpo_t *l2b; l2b = l2_bridge_dpo_get_from_dpo(dpo); l2b->l2b_locks++; } static void l2_bridge_dpo_unlock (dpo_id_t *dpo) { l2_bridge_dpo_t *l2b; l2b = l2_bridge_dpo_get_from_dpo(dpo); l2b->l2b_locks--; if (0 == l2b->l2b_locks) { l2_bridge_dpo_db[l2b->l2b_sw_if_index] = INDEX_INVALID; pool_put(l2_bridge_dpo_pool, l2b); } } /* * l2_bridge_dpo_add_or_lock * * Add/create and lock a new or lock an existing for the L2 Bridge * on the interface given */ void l2_bridge_dpo_add_or_lock (u32 sw_if_index, dpo_id_t *dpo) { l2_bridge_dpo_t *l2b; vec_validate_init_empty(l2_bridge_dpo_db, sw_if_index, INDEX_INVALID); if (INDEX_INVALID == l2_bridge_dpo_db[sw_if_index]) { l2b = l2_bridge_dpo_alloc(); l2b->l2b_sw_if_index = sw_if_index; l2_bridge_dpo_db[sw_if_index] = l2_bridge_dpo_get_index(l2b); } else { l2b = l2_bridge_dpo_get(l2_bridge_dpo_db[sw_if_index]); } dpo_set(dpo, DPO_L2_BRIDGE, DPO_PROTO_ETHERNET, l2_bridge_dpo_get_index(l2b)); } static clib_error_t * l2_bridge_dpo_interface_state_change (vnet_main_t * vnm, u32 sw_if_index, u32 flags) { /* */ return (NULL); } VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION( l2_bridge_dpo_interface_state_change); /** * @brief Registered callback for HW interface state changes */ static clib_error_t * l2_bridge_dpo_hw_interface_state_change (vnet_main_t * vnm, u32 hw_if_index, u32 flags) { return (NULL); } VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION( l2_bridge_dpo_hw_interface_state_change); static clib_error_t * l2_bridge_dpo_interface_delete (vnet_main_t * vnm, u32 sw_if_index, u32 is_add) { return (NULL); } VNET_SW_INTERFACE_ADD_DEL_FUNCTION( l2_bridge_dpo_interface_delete); u8* format_l2_bridge_dpo (u8* s, va_list *ap) { index_t index = va_arg(*ap, index_t); CLIB_UNUSED(u32 indent) = va_arg(*ap, u32); vnet_main_t * vnm = vnet_get_main(); l2_bridge_dpo_t *l2b = l2_bridge_dpo_get(index); return (format(s, "l2-bridge-%U-dpo", format_vnet_sw_interface_name, vnm, vnet_get_sw_interface(vnm, l2b->l2b_sw_if_index))); } static void l2_bridge_dpo_mem_show (void) { fib_show_memory_usage("L2-bridge", pool_elts(l2_bridge_dpo_pool), pool_len(l2_bridge_dpo_pool), sizeof(l2_bridge_dpo_t)); } const static dpo_vft_t l2_bridge_dpo_vft = { .dv_lock = l2_bridge_dpo_lock, .dv_unlock = l2_bridge_dpo_unlock, .dv_format = format_l2_bridge_dpo, .dv_mem_show = l2_bridge_dpo_mem_show, }; /** * @brief The per-protocol VLIB graph nodes that are assigned to a glean * object. * * this means that these graph nodes are ones from which a glean is the * parent object in the DPO-graph. */ const static char* const l2_bridge_dpo_l2_nodes[] = { "l2-bridge-dpo", NULL, }; const static char* const * const l2_bridge_dpo_nodes[DPO_PROTO_NUM] = { [DPO_PROTO_ETHERNET] = l2_bridge_dpo_l2_nodes, }; void l2_bridge_dpo_module_init (void) { dpo_register(DPO_L2_BRIDGE, &l2_bridge_dpo_vft, l2_bridge_dpo_nodes); } /** * @brief Interface DPO trace data */ typedef struct l2_bridge_dpo_trace_t_ { u32 sw_if_index; } l2_bridge_dpo_trace_t; typedef enum l2_bridge_dpo_next_t_ { L2_BRIDGE_DPO_DROP = 0, L2_BRIDGE_DPO_OUTPUT = 1, } l2_bridge_dpo_next_t; always_inline uword l2_bridge_dpo_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { u32 n_left_from, next_index, * from, * to_next; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; next_index = node->cached_next_index; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next); while (n_left_from >= 4 && n_left_to_next > 2) { const l2_bridge_dpo_t *l2b0, *l2b1; u32 bi0, l2bi0, bi1, l2bi1; vlib_buffer_t *b0, *b1; u8 len0, len1; bi0 = from[0]; to_next[0] = bi0; bi1 = from[1]; to_next[1] = bi1; from += 2; to_next += 2; n_left_from -= 2; n_left_to_next -= 2; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); l2bi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX]; l2bi1 = vnet_buffer(b1)->ip.adj_index[VLIB_TX]; l2b0 = l2_bridge_dpo_get(l2bi0); l2b1 = l2_bridge_dpo_get(l2bi1); vnet_buffer(b0)->sw_if_index[VLIB_TX] = l2b0->l2b_sw_if_index; vnet_buffer(b1)->sw_if_index[VLIB_TX] = l2b1->l2b_sw_if_index; len0 = ((u8*)vlib_buffer_get_current(b0) - (u8*)ethernet_buffer_get_header(b0)); len1 = ((u8*)vlib_buffer_get_current(b1) - (u8*)ethernet_buffer_get_header(b1)); vnet_buffer(b0)->l2.l2_len = len0; vnet_buffer(b1)->l2.l2_len = len1; vlib_buffer_advance(b0, -len0); vlib_buffer_advance(b1, -len1); if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) { l2_bridge_dpo_trace_t *tr0; tr0 = vlib_add_trace (vm, node, b0, sizeof (*tr0)); tr0->sw_if_index = l2b0->l2b_sw_if_index; } if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED)) { l2_bridge_dpo_trace_t *tr1; tr1 = vlib_add_trace (vm, node, b1, sizeof (*tr1)); tr1->sw_if_index = l2b1->l2b_sw_if_index; } vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next, n_left_to_next, bi0, bi1, L2_BRIDGE_DPO_OUTPUT, L2_BRIDGE_DPO_OUTPUT); } while (n_left_from > 0 && n_left_to_next > 0) { const l2_bridge_dpo_t * l2b0; vlib_buffer_t * b0; u32 bi0, l2bi0; u8 len0; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); l2bi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX]; l2b0 = l2_bridge_dpo_get(l2bi0); vnet_buffer(b0)->sw_if_index[VLIB_TX] = l2b0->l2b_sw_if_index; /* * take that, and rewind it back... */ len0 = ((u8*)vlib_buffer_get_current(b0) - (u8*)ethernet_buffer_get_header(b0)); vnet_buffer(b0)->l2.l2_len = len0; vlib_buffer_advance(b0, -len0); if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) { l2_bridge_dpo_trace_t *tr; tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->sw_if_index = l2b0->l2b_sw_if_index; } vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, L2_BRIDGE_DPO_OUTPUT); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } return from_frame->n_vectors; } static u8 * format_l2_bridge_dpo_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); l2_bridge_dpo_trace_t * t = va_arg (*args, l2_bridge_dpo_trace_t *); uword indent = format_get_indent (s); s = format (s, "%U sw_if_index:%d", format_white_space, indent, t->sw_if_index); return s; } static uword l2_bridge_dpo_l2 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return (l2_bridge_dpo_inline(vm, node, from_frame)); } VLIB_REGISTER_NODE (l2_bridge_dpo_l2_node) = { .function = l2_bridge_dpo_l2, .name = "l2-bridge-dpo", .vector_size = sizeof (u32), .format_trace = format_l2_bridge_dpo_trace, .n_next_nodes = 2, .next_nodes = { [L2_BRIDGE_DPO_DROP] = "error-drop", [L2_BRIDGE_DPO_OUTPUT] = "l2-output", }, }; VLIB_NODE_FUNCTION_MULTIARCH (l2_bridge_dpo_l2_node, l2_bridge_dpo_l2)