diff options
Diffstat (limited to 'src/vnet/dpo/l2_bridge_dpo.c')
| -rw-r--r-- | src/vnet/dpo/l2_bridge_dpo.c | 375 |
1 files changed, 375 insertions, 0 deletions
diff --git a/src/vnet/dpo/l2_bridge_dpo.c b/src/vnet/dpo/l2_bridge_dpo.c new file mode 100644 index 00000000000..169478148c3 --- /dev/null +++ b/src/vnet/dpo/l2_bridge_dpo.c @@ -0,0 +1,375 @@ +/* + * 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 <vnet/dpo/l2_bridge_dpo.h> +#include <vnet/fib/fib_node.h> +#include <vnet/ethernet/ethernet.h> + +/* + * 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) |