2 * l2_output_acl.c : layer 2 output acl processing
4 * Copyright (c) 2013 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vlib/vlib.h>
19 #include <vnet/vnet.h>
20 #include <vnet/pg/pg.h>
21 #include <vnet/ethernet/ethernet.h>
22 #include <vnet/ethernet/packet.h>
23 #include <vnet/ip/ip_packet.h>
24 #include <vnet/ip/ip4_packet.h>
25 #include <vnet/ip/ip6_packet.h>
27 #include <vnet/l2/feat_bitmap.h>
28 #include <vnet/l2/l2_output.h>
30 #include <vppinfra/error.h>
31 #include <vppinfra/hash.h>
32 #include <vppinfra/cache.h>
37 /* Next nodes for L2 output features */
38 u32 l2_out_feat_next[32];
40 /* convenience variables */
41 vlib_main_t *vlib_main;
42 vnet_main_t *vnet_main;
49 /* per-pkt trace data */
56 /* packet trace format function */
58 format_l2_outacl_trace (u8 * s, va_list * args)
60 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
61 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
62 l2_outacl_trace_t *t = va_arg (*args, l2_outacl_trace_t *);
64 s = format (s, "l2-output-acl: sw_if_index %d dst %U src %U",
66 format_ethernet_address, t->dst,
67 format_ethernet_address, t->src);
71 l2_outacl_main_t l2_outacl_main;
73 static vlib_node_registration_t l2_outacl_node;
75 #define foreach_l2_outacl_error \
76 _(L2_OUTACL, "L2 output ACL packets") \
77 _(DROP, "L2 output drops")
81 #define _(sym,str) L2_OUTACL_ERROR_##sym,
82 foreach_l2_outacl_error
87 static char *l2_outacl_error_strings[] = {
88 #define _(sym,string) string,
89 foreach_l2_outacl_error
102 l2_outacl_node_fn (vlib_main_t * vm,
103 vlib_node_runtime_t * node, vlib_frame_t * frame)
105 u32 n_left_from, *from, *to_next;
106 l2_outacl_next_t next_index;
107 l2_outacl_main_t *msm = &l2_outacl_main;
108 vlib_node_t *n = vlib_get_node (vm, l2_outacl_node.index);
109 u32 node_counter_base_index = n->error_heap_index;
110 vlib_error_main_t *em = &vm->error_main;
112 from = vlib_frame_vector_args (frame);
113 n_left_from = frame->n_vectors; /* number of packets to process */
114 next_index = node->cached_next_index;
116 while (n_left_from > 0)
120 /* get space to enqueue frame to graph node "next_index" */
121 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
123 while (0 && n_left_from >= 4 && n_left_to_next >= 2)
126 vlib_buffer_t *b0, *b1;
128 u32 sw_if_index0, sw_if_index1;
129 ethernet_header_t *h0, *h1;
131 /* Prefetch next iteration. */
133 vlib_buffer_t *p2, *p3;
135 p2 = vlib_get_buffer (vm, from[2]);
136 p3 = vlib_get_buffer (vm, from[3]);
138 vlib_prefetch_buffer_header (p2, LOAD);
139 vlib_prefetch_buffer_header (p3, LOAD);
141 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
142 CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
145 /* speculatively enqueue b0 and b1 to the current next frame */
146 /* bi is "buffer index", b is pointer to the buffer */
147 to_next[0] = bi0 = from[0];
148 to_next[1] = bi1 = from[1];
154 b0 = vlib_get_buffer (vm, bi0);
155 b1 = vlib_get_buffer (vm, bi1);
157 /* TX interface handles */
158 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
159 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
161 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
163 if (b0->flags & VLIB_BUFFER_IS_TRACED)
165 l2_outacl_trace_t *t =
166 vlib_add_trace (vm, node, b0, sizeof (*t));
167 t->sw_if_index = sw_if_index0;
168 t->next_index = next0;
169 clib_memcpy (t->src, h0->src_address, 6);
170 clib_memcpy (t->dst, h0->dst_address, 6);
172 if (b1->flags & VLIB_BUFFER_IS_TRACED)
174 l2_outacl_trace_t *t =
175 vlib_add_trace (vm, node, b1, sizeof (*t));
176 t->sw_if_index = sw_if_index1;
177 t->next_index = next1;
178 clib_memcpy (t->src, h1->src_address, 6);
179 clib_memcpy (t->dst, h1->dst_address, 6);
183 em->counters[node_counter_base_index + L2_OUTACL_ERROR_L2_OUTACL] +=
186 /* add core loop code here */
188 /* verify speculative enqueues, maybe switch current next frame */
189 /* if next0==next1==next_index then nothing special needs to be done */
190 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
191 to_next, n_left_to_next,
192 bi0, bi1, next0, next1);
195 while (n_left_from > 0 && n_left_to_next > 0)
201 ethernet_header_t *h0;
203 /* speculatively enqueue b0 to the current next frame */
211 b0 = vlib_get_buffer (vm, bi0);
212 h0 = vlib_buffer_get_current (b0);
214 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
216 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
217 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
219 l2_outacl_trace_t *t =
220 vlib_add_trace (vm, node, b0, sizeof (*t));
221 t->sw_if_index = sw_if_index0;
222 clib_memcpy (t->src, h0->src_address, 6);
223 clib_memcpy (t->dst, h0->dst_address, 6);
226 em->counters[node_counter_base_index + L2_OUTACL_ERROR_L2_OUTACL] +=
231 * Dummy for now, just go to next feature node
234 /* Determine next node */
235 next0 = vnet_l2_feature_next (b0, msm->l2_out_feat_next,
238 /* verify speculative enqueue, maybe switch current next frame */
239 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
240 to_next, n_left_to_next,
244 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
247 return frame->n_vectors;
252 VLIB_REGISTER_NODE (l2_outacl_node,static) = {
253 .function = l2_outacl_node_fn,
254 .name = "l2-output-acl",
255 .vector_size = sizeof (u32),
256 .format_trace = format_l2_outacl_trace,
257 .type = VLIB_NODE_TYPE_INTERNAL,
259 .n_errors = ARRAY_LEN(l2_outacl_error_strings),
260 .error_strings = l2_outacl_error_strings,
262 .n_next_nodes = L2_OUTACL_N_NEXT,
264 /* edit / add dispositions here */
266 [L2_OUTACL_NEXT_DROP] = "error-drop",
271 VLIB_NODE_FUNCTION_MULTIARCH (l2_outacl_node, l2_outacl_node_fn)
272 clib_error_t *l2_outacl_init (vlib_main_t * vm)
274 l2_outacl_main_t *mp = &l2_outacl_main;
277 mp->vnet_main = vnet_get_main ();
279 /* Initialize the feature next-node indexes */
280 feat_bitmap_init_next_nodes (vm,
281 l2_outacl_node.index,
283 l2output_get_feat_names (),
284 mp->l2_out_feat_next);
289 VLIB_INIT_FUNCTION (l2_outacl_init);
292 /** @todo maybe someone will add output ACL's in the future.
293 * Set subinterface outacl enable/disable.
295 * set interface acl output <interface> [disable]
297 static clib_error_t *
298 int_l2_outacl (vlib_main_t * vm,
299 unformat_input_t * input, vlib_cli_command_t * cmd)
301 vnet_main_t *vnm = vnet_get_main ();
302 clib_error_t *error = 0;
306 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
308 error = clib_error_return (0, "unknown interface `%U'",
309 format_unformat_error, input);
314 if (unformat (input, "disable"))
319 /* set the interface flag */
320 l2output_intf_bitmap_enable (sw_if_index, L2OUTPUT_FEAT_ACL, enable);
327 VLIB_CLI_COMMAND (int_l2_outacl_cli, static) = {
328 .path = "set interface acl output",
329 .short_help = "set interface acl output <interface> [disable]",
330 .function = int_l2_outacl,
336 * fd.io coding-style-patch-verification: ON
339 * eval: (c-set-style "gnu")