FD.io VPP  v18.01.2-1-g9b554f3
Vector Packet Processing
node1.c
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1 /*
2  * Copyright (c) 2016 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #include <vnet/cop/cop.h>
17 
18 typedef struct {
22 
23 /* packet trace format function */
24 static u8 * format_cop_input_trace (u8 * s, va_list * args)
25 {
26  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
27  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
28  cop_input_trace_t * t = va_arg (*args, cop_input_trace_t *);
29 
30  s = format (s, "COP_INPUT: sw_if_index %d, next index %d",
31  t->sw_if_index, t->next_index);
32  return s;
33 }
34 
36 
37 #define foreach_cop_input_error \
38 _(PROCESSED, "COP input packets processed")
39 
40 typedef enum {
41 #define _(sym,str) COP_INPUT_ERROR_##sym,
43 #undef _
46 
47 static char * cop_input_error_strings[] = {
48 #define _(sym,string) string,
50 #undef _
51 };
52 
53 static uword
55  vlib_node_runtime_t * node,
56  vlib_frame_t * frame)
57 {
58  u32 n_left_from, * from, * to_next;
59  cop_feature_type_t next_index;
60  cop_main_t *cm = &cop_main;
61 
62  from = vlib_frame_vector_args (frame);
63  n_left_from = frame->n_vectors;
64  next_index = node->cached_next_index;
65 
66  while (n_left_from > 0)
67  {
68  u32 n_left_to_next;
69 
70  vlib_get_next_frame (vm, node, next_index,
71  to_next, n_left_to_next);
72 
73  while (n_left_from >= 4 && n_left_to_next >= 2)
74  {
75  u32 bi0, bi1;
76  vlib_buffer_t * b0, * b1;
77  u32 next0, next1;
78  u32 sw_if_index0, sw_if_index1;
79  ethernet_header_t * en0, * en1;
80  cop_config_main_t * ccm0, * ccm1;
81  u32 advance0, advance1;
82  int proto0, proto1;
83 
84  /* Prefetch next iteration. */
85  {
86  vlib_buffer_t * p2, * p3;
87 
88  p2 = vlib_get_buffer (vm, from[2]);
89  p3 = vlib_get_buffer (vm, from[3]);
90 
91  vlib_prefetch_buffer_header (p2, LOAD);
92  vlib_prefetch_buffer_header (p3, LOAD);
93 
96  }
97 
98  /* speculatively enqueue b0 and b1 to the current next frame */
99  to_next[0] = bi0 = from[0];
100  to_next[1] = bi1 = from[1];
101  from += 2;
102  to_next += 2;
103  n_left_from -= 2;
104  n_left_to_next -= 2;
105 
106  b0 = vlib_get_buffer (vm, bi0);
107  b1 = vlib_get_buffer (vm, bi1);
108 
109  en0 = vlib_buffer_get_current (b0);
110  en1 = vlib_buffer_get_current (b1);
111 
112  sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
113  sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
114 
115  proto0 = VNET_COP_DEFAULT;
116  proto1 = VNET_COP_DEFAULT;
117  advance0 = 0;
118  advance1 = 0;
119 
120  if (en0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP4))
121  {
122  proto0 = VNET_COP_IP4;
123  advance0 = sizeof(ethernet_header_t);
124  }
125  else if (en0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP6))
126  {
127  proto0 = VNET_COP_IP6;
128  advance0 = sizeof(ethernet_header_t);
129  }
130 
131  if (en1->type == clib_host_to_net_u16(ETHERNET_TYPE_IP4))
132  {
133  proto1 = VNET_COP_IP4;
134  advance1 = sizeof(ethernet_header_t);
135  }
136  else if (en1->type == clib_host_to_net_u16(ETHERNET_TYPE_IP6))
137  {
138  proto1 = VNET_COP_IP6;
139  advance1 = sizeof(ethernet_header_t);
140  }
141 
142  ccm0 = cm->cop_config_mains + proto0;
143  ccm1 = cm->cop_config_mains + proto1;
144  vnet_buffer(b0)->cop.current_config_index =
145  ccm0->config_index_by_sw_if_index [sw_if_index0];
146 
147  vnet_buffer(b1)->cop.current_config_index =
148  ccm1->config_index_by_sw_if_index [sw_if_index1];
149 
150  vlib_buffer_advance (b0, advance0);
151  vlib_buffer_advance (b1, advance1);
152 
154  &vnet_buffer(b0)->cop.current_config_index,
155  &next0, 0 /* bytes of config data */);
156 
158  &vnet_buffer(b1)->cop.current_config_index,
159  &next1, 0 /* bytes of config data */);
160 
162  && (b0->flags & VLIB_BUFFER_IS_TRACED)))
163  {
164  cop_input_trace_t *t =
165  vlib_add_trace (vm, node, b0, sizeof (*t));
166  t->sw_if_index = sw_if_index0;
167  t->next_index = next0;
168  }
169 
171  && (b1->flags & VLIB_BUFFER_IS_TRACED)))
172  {
173  cop_input_trace_t *t =
174  vlib_add_trace (vm, node, b1, sizeof (*t));
175  t->sw_if_index = sw_if_index1;
176  t->next_index = next1;
177  }
178  /* verify speculative enqueues, maybe switch current next frame */
179  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
180  to_next, n_left_to_next,
181  bi0, bi1, next0, next1);
182  }
183 
184  while (n_left_from > 0 && n_left_to_next > 0)
185  {
186  u32 bi0;
187  vlib_buffer_t * b0;
188  u32 next0;
189  u32 sw_if_index0;
190  ethernet_header_t *en0;
191  cop_config_main_t *ccm0;
192  u32 advance0;
193  int proto0;
194 
195  /* speculatively enqueue b0 to the current next frame */
196  bi0 = from[0];
197  to_next[0] = bi0;
198  from += 1;
199  to_next += 1;
200  n_left_from -= 1;
201  n_left_to_next -= 1;
202 
203  b0 = vlib_get_buffer (vm, bi0);
204 
205  /*
206  * Direct from the driver, we should be at offset 0
207  * aka at &b0->data[0]
208  */
209  ASSERT (b0->current_data == 0);
210 
211  en0 = vlib_buffer_get_current (b0);
212 
213  sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
214 
215  proto0 = VNET_COP_DEFAULT;
216  advance0 = 0;
217 
218  if (en0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP4))
219  {
220  proto0 = VNET_COP_IP4;
221  advance0 = sizeof(ethernet_header_t);
222  }
223  else if (en0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP6))
224  {
225  proto0 = VNET_COP_IP6;
226  advance0 = sizeof(ethernet_header_t);
227  }
228 
229  ccm0 = cm->cop_config_mains + proto0;
230  vnet_buffer(b0)->cop.current_config_index =
231  ccm0->config_index_by_sw_if_index [sw_if_index0];
232 
233  vlib_buffer_advance (b0, advance0);
234 
236  &vnet_buffer(b0)->cop.current_config_index,
237  &next0, 0 /* bytes of config data */);
238 
240  && (b0->flags & VLIB_BUFFER_IS_TRACED)))
241  {
242  cop_input_trace_t *t =
243  vlib_add_trace (vm, node, b0, sizeof (*t));
244  t->sw_if_index = sw_if_index0;
245  t->next_index = next0;
246  }
247 
248  /* verify speculative enqueue, maybe switch current next frame */
249  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
250  to_next, n_left_to_next,
251  bi0, next0);
252  }
253 
254  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
255  }
257  COP_INPUT_ERROR_PROCESSED, frame->n_vectors);
258  return frame->n_vectors;
259 }
260 
262  .function = cop_input_node_fn,
263  .name = "cop-input",
264  .vector_size = sizeof (u32),
265  .format_trace = format_cop_input_trace,
266  .type = VLIB_NODE_TYPE_INTERNAL,
267 
268  .n_errors = ARRAY_LEN(cop_input_error_strings),
269  .error_strings = cop_input_error_strings,
270 
271  .n_next_nodes = COP_RX_N_FEATURES,
272 
273  /* edit / add dispositions here */
274  .next_nodes = {
275  [IP4_RX_COP_WHITELIST] = "ip4-cop-whitelist",
276  [IP6_RX_COP_WHITELIST] = "ip6-cop-whitelist",
277  [DEFAULT_RX_COP_WHITELIST] = "default-cop-whitelist",
278  [IP4_RX_COP_INPUT] = "ip4-input",
279  [IP6_RX_COP_INPUT] = "ip6-input",
280  [DEFAULT_RX_COP_INPUT] = "ethernet-input",
281  [RX_COP_DROP] = "error-drop",
282  },
283 };
284 
286 
287 #define foreach_cop_stub \
288 _(default-cop-whitelist, default_cop_whitelist)
289 
290 #define _(n,f) \
291  \
292 static uword \
293 f##_node_fn (vlib_main_t * vm, \
294  vlib_node_runtime_t * node, \
295  vlib_frame_t * frame) \
296 { \
297  clib_warning ("BUG: stub function called"); \
298  return 0; \
299 } \
300  \
301 VLIB_REGISTER_NODE (f##_input_node) = { \
302  .function = f##_node_fn, \
303  .name = #n, \
304  .vector_size = sizeof (u32), \
305  .type = VLIB_NODE_TYPE_INTERNAL, \
306  \
307  .n_errors = 0, \
308  .error_strings = 0, \
309  \
310  .n_next_nodes = 0, \
311 };
312 
314 
315 
316 
317 
318 
319 
#define CLIB_UNUSED(x)
Definition: clib.h:79
cop_config_main_t cop_config_mains[VNET_N_COPS]
Definition: cop.h:66
cop_input_error_t
Definition: node1.c:40
vlib_node_registration_t cop_input_node
(constructor) VLIB_REGISTER_NODE (cop_input_node)
Definition: node1.c:35
struct _vlib_node_registration vlib_node_registration_t
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
#define foreach_cop_stub
Definition: node1.c:287
static char * cop_input_error_strings[]
Definition: node1.c:47
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:68
u32 * config_index_by_sw_if_index
Definition: cop.h:58
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:171
static uword cop_input_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: node1.c:54
static u8 * format_cop_input_trace(u8 *s, va_list *args)
Definition: node1.c:24
u32 sw_if_index
Definition: node1.c:20
cop_feature_type_t
Definition: cop.h:39
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:195
static void * vnet_get_config_data(vnet_config_main_t *cm, u32 *config_index, u32 *next_index, u32 n_data_bytes)
Definition: config.h:122
#define PREDICT_FALSE(x)
Definition: clib.h:105
#define vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1)
Finish enqueueing two buffers forward in the graph.
Definition: buffer_node.h:70
#define vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0)
Finish enqueueing one buffer forward in the graph.
Definition: buffer_node.h:218
#define vlib_get_next_frame(vm, node, next_index, vectors, n_vectors_left)
Get pointer to next frame vector data by (vlib_node_runtime_t, next_index).
Definition: node_funcs.h:364
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1158
#define foreach_cop_input_error
Definition: node1.c:37
u16 n_vectors
Definition: node.h:344
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:82
vlib_main_t * vm
Definition: buffer.c:283
#define VLIB_BUFFER_IS_TRACED
Definition: buffer.h:93
#define ARRAY_LEN(x)
Definition: clib.h:59
void vlib_put_next_frame(vlib_main_t *vm, vlib_node_runtime_t *r, u32 next_index, u32 n_vectors_left)
Release pointer to next frame vector data.
Definition: main.c:454
cop_main_t cop_main
Definition: cop.c:17
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:456
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:208
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:259
u64 uword
Definition: types.h:112
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:55
u32 next_index
Definition: node1.c:19
unsigned char u8
Definition: types.h:56
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:267
#define vnet_buffer(b)
Definition: buffer.h:326
#define VLIB_NODE_FUNCTION_MULTIARCH(node, fn)
Definition: node.h:158
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:143
u8 data[0]
Packet data.
Definition: buffer.h:159
u16 flags
Copy of main node flags.
Definition: node.h:450
Definition: cop.h:65
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:67
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:75
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:57
Definition: defs.h:46
vnet_config_main_t config_main
Definition: cop.h:57