diff options
Diffstat (limited to 'src/vnet/l2/l2_output_acl.c')
| -rw-r--r-- | src/vnet/l2/l2_output_acl.c | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/src/vnet/l2/l2_output_acl.c b/src/vnet/l2/l2_output_acl.c new file mode 100644 index 00000000000..94a4d66b48f --- /dev/null +++ b/src/vnet/l2/l2_output_acl.c @@ -0,0 +1,358 @@ +/* + * l2_output_acl.c : layer 2 output acl processing + * + * Copyright (c) 2013 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 <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/pg/pg.h> +#include <vnet/ethernet/ethernet.h> +#include <vnet/ethernet/packet.h> +#include <vnet/ip/ip_packet.h> +#include <vnet/ip/ip4_packet.h> +#include <vnet/ip/ip6_packet.h> +#include <vlib/cli.h> +#include <vnet/l2/feat_bitmap.h> +#include <vnet/l2/l2_output.h> + +#include <vppinfra/error.h> +#include <vppinfra/hash.h> +#include <vppinfra/cache.h> + + +typedef struct +{ + /* Next nodes for features and output interfaces */ + l2_output_next_nodes_st next_nodes; + + /* convenience variables */ + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; +} l2_outacl_main_t; + + + +typedef struct +{ + /* per-pkt trace data */ + u8 src[6]; + u8 dst[6]; + u32 next_index; + u32 sw_if_index; +} l2_outacl_trace_t; + +/* packet trace format function */ +static u8 * +format_l2_outacl_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_outacl_trace_t *t = va_arg (*args, l2_outacl_trace_t *); + + s = format (s, "l2-output-acl: sw_if_index %d dst %U src %U", + t->sw_if_index, + format_ethernet_address, t->dst, + format_ethernet_address, t->src); + return s; +} + +l2_outacl_main_t l2_outacl_main; + +static vlib_node_registration_t l2_outacl_node; + +#define foreach_l2_outacl_error \ +_(L2_OUTACL, "L2 output ACL packets") \ +_(DROP, "L2 output drops") + +typedef enum +{ +#define _(sym,str) L2_OUTACL_ERROR_##sym, + foreach_l2_outacl_error +#undef _ + L2_OUTACL_N_ERROR, +} l2_outacl_error_t; + +static char *l2_outacl_error_strings[] = { +#define _(sym,string) string, + foreach_l2_outacl_error +#undef _ +}; + +typedef enum +{ + L2_OUTACL_NEXT_DROP, + L2_OUTACL_N_NEXT, +} l2_outacl_next_t; + + + +static uword +l2_outacl_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + u32 n_left_from, *from, *to_next; + l2_outacl_next_t next_index; + l2_outacl_main_t *msm = &l2_outacl_main; + vlib_node_t *n = vlib_get_node (vm, l2_outacl_node.index); + u32 node_counter_base_index = n->error_heap_index; + vlib_error_main_t *em = &vm->error_main; + u32 cached_sw_if_index = (u32) ~ 0; + u32 cached_next_index = (u32) ~ 0; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; /* number of packets to process */ + next_index = node->cached_next_index; + + while (n_left_from > 0) + { + u32 n_left_to_next; + + /* get space to enqueue frame to graph node "next_index" */ + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while (0 && n_left_from >= 4 && n_left_to_next >= 2) + { + u32 bi0, bi1; + vlib_buffer_t *b0, *b1; + u32 next0, next1; + u32 sw_if_index0, sw_if_index1; + ethernet_header_t *h0, *h1; + + /* Prefetch next iteration. */ + { + vlib_buffer_t *p2, *p3; + + p2 = vlib_get_buffer (vm, from[2]); + p3 = vlib_get_buffer (vm, from[3]); + + vlib_prefetch_buffer_header (p2, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE); + CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); + } + + /* speculatively enqueue b0 and b1 to the current next frame */ + /* bi is "buffer index", b is pointer to the buffer */ + to_next[0] = bi0 = from[0]; + to_next[1] = bi1 = from[1]; + 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); + + /* TX interface handles */ + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; + sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_TX]; + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) + { + if (b0->flags & VLIB_BUFFER_IS_TRACED) + { + l2_outacl_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + clib_memcpy (t->src, h0->src_address, 6); + clib_memcpy (t->dst, h0->dst_address, 6); + } + if (b1->flags & VLIB_BUFFER_IS_TRACED) + { + l2_outacl_trace_t *t = + vlib_add_trace (vm, node, b1, sizeof (*t)); + t->sw_if_index = sw_if_index1; + t->next_index = next1; + clib_memcpy (t->src, h1->src_address, 6); + clib_memcpy (t->dst, h1->dst_address, 6); + } + } + + em->counters[node_counter_base_index + L2_OUTACL_ERROR_L2_OUTACL] += + 2; + + /* add core loop code here */ + + /* verify speculative enqueues, maybe switch current next frame */ + /* if next0==next1==next_index then nothing special needs to be done */ + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + u32 next0; + u32 sw_if_index0; + ethernet_header_t *h0; + u32 feature_bitmap0; + + /* speculatively enqueue b0 to the current next frame */ + 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); + h0 = vlib_buffer_get_current (b0); + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + l2_outacl_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + clib_memcpy (t->src, h0->src_address, 6); + clib_memcpy (t->dst, h0->dst_address, 6); + } + + em->counters[node_counter_base_index + L2_OUTACL_ERROR_L2_OUTACL] += + 1; + + /* + * L2_OUTACL code + * Dummy for now, just go to next feature node + */ + + + /* Remove ourself from the feature bitmap */ + feature_bitmap0 = + vnet_buffer (b0)->l2.feature_bitmap & ~L2OUTPUT_FEAT_ACL; + + /* Determine next node */ + l2_output_dispatch (msm->vlib_main, + msm->vnet_main, + node, + l2_outacl_node.index, + &cached_sw_if_index, + &cached_next_index, + &msm->next_nodes, + b0, sw_if_index0, feature_bitmap0, &next0); + + /* verify speculative enqueue, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, + to_next, n_left_to_next, + bi0, next0); + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + return frame->n_vectors; +} + + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (l2_outacl_node,static) = { + .function = l2_outacl_node_fn, + .name = "l2-output-acl", + .vector_size = sizeof (u32), + .format_trace = format_l2_outacl_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(l2_outacl_error_strings), + .error_strings = l2_outacl_error_strings, + + .n_next_nodes = L2_OUTACL_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = { + [L2_OUTACL_NEXT_DROP] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (l2_outacl_node, l2_outacl_node_fn) + clib_error_t *l2_outacl_init (vlib_main_t * vm) +{ + l2_outacl_main_t *mp = &l2_outacl_main; + + mp->vlib_main = vm; + mp->vnet_main = vnet_get_main (); + + /* Initialize the feature next-node indexes */ + feat_bitmap_init_next_nodes (vm, + l2_outacl_node.index, + L2OUTPUT_N_FEAT, + l2output_get_feat_names (), + mp->next_nodes.feat_next_node_index); + + /* Initialize the output node mapping table */ + l2output_init_output_node_vec (&mp->next_nodes.output_node_index_vec); + + return 0; +} + +VLIB_INIT_FUNCTION (l2_outacl_init); + +#if 0 +/** @todo maybe someone will add output ACL's in the future. + * Set subinterface outacl enable/disable. + * The CLI format is: + * set interface acl output <interface> [disable] + */ +static clib_error_t * +int_l2_outacl (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + vnet_main_t *vnm = vnet_get_main (); + clib_error_t *error = 0; + u32 sw_if_index; + u32 enable; + + if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) + { + error = clib_error_return (0, "unknown interface `%U'", + format_unformat_error, input); + goto done; + } + + enable = 1; + if (unformat (input, "disable")) + { + enable = 0; + } + + /* set the interface flag */ + l2output_intf_bitmap_enable (sw_if_index, L2OUTPUT_FEAT_ACL, enable); + +done: + return error; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (int_l2_outacl_cli, static) = { + .path = "set interface acl output", + .short_help = "set interface acl output <interface> [disable]", + .function = int_l2_outacl, +}; +/* *INDENT-ON* */ +#endif + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |