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Vector Packet Processing
gbp_classify.c
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1 /*
2  * gbp.h : Group Based Policy
3  *
4  * Copyright (c) 2018 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:
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
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.
16  */
17 
18 #include <plugins/gbp/gbp.h>
19 
21 {
25 
26 #define GBP_SRC_N_CLASSIFY (GBP_SRC_CLASSIFY_PORT + 1)
27 
28 /**
29  * Grouping of global data for the GBP source EPG classification feature
30  */
32 {
33  /**
34  * Next nodes for L2 output features
35  */
38 
40 
41 /**
42  * per-packet trace data
43  */
44 typedef struct gbp_classify_trace_t_
45 {
46  /* per-pkt trace data */
49 
50 /*
51  * determine the SRC EPG form the input port
52  */
55  vlib_node_runtime_t * node,
56  vlib_frame_t * frame,
57  gbp_src_classify_type_t type, u8 is_l3)
58 {
60  u32 n_left_from, *from, *to_next;
61  u32 next_index;
62 
63  next_index = 0;
64  n_left_from = frame->n_vectors;
65  from = vlib_frame_vector_args (frame);
66 
67  while (n_left_from > 0)
68  {
69  u32 n_left_to_next;
70 
71  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
72 
73  while (n_left_from > 0 && n_left_to_next > 0)
74  {
75  u32 next0, bi0, src_epg, sw_if_index0;
76  vlib_buffer_t *b0;
77 
78  bi0 = from[0];
79  to_next[0] = bi0;
80  from += 1;
81  to_next += 1;
82  n_left_from -= 1;
83  n_left_to_next -= 1;
84 
85  b0 = vlib_get_buffer (vm, bi0);
86 
87  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
88 
89  if (GBP_SRC_CLASSIFY_NULL == type)
90  {
91  src_epg = ~0;
92  next0 =
94  L2INPUT_FEAT_GBP_NULL_CLASSIFY);
95  }
96  else
97  {
98  src_epg = gbp_port_to_epg (sw_if_index0);
99  if (is_l3)
100  {
101  /*
102  * Go straight to looukp, do not pass go, do not collect $200
103  */
104  next0 = 0;
105  }
106  else
107  {
108  next0 =
109  vnet_l2_feature_next (b0, gscm->l2_input_feat_next[type],
110  L2INPUT_FEAT_GBP_SRC_CLASSIFY);
111  }
112  }
113 
114  vnet_buffer2 (b0)->gbp.src_epg = src_epg;
115 
116  if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
117  {
119  vlib_add_trace (vm, node, b0, sizeof (*t));
120  t->src_epg = src_epg;
121  }
122 
123  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
124  to_next, n_left_to_next,
125  bi0, next0);
126  }
127 
128  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
129  }
130 
131  return frame->n_vectors;
132 }
133 
134 static uword
136  vlib_node_runtime_t * node, vlib_frame_t * frame)
137 {
138  return (gbp_classify_inline (vm, node, frame, GBP_SRC_CLASSIFY_PORT, 0));
139 }
140 
141 static uword
143  vlib_node_runtime_t * node, vlib_frame_t * frame)
144 {
145  return (gbp_classify_inline (vm, node, frame, GBP_SRC_CLASSIFY_NULL, 0));
146 }
147 
148 static uword
150  vlib_node_runtime_t * node, vlib_frame_t * frame)
151 {
152  return (gbp_classify_inline (vm, node, frame, 0, 1));
153 }
154 
155 static uword
157  vlib_node_runtime_t * node, vlib_frame_t * frame)
158 {
159  return (gbp_classify_inline (vm, node, frame, 0, 1));
160 }
161 
162 
163 /* packet trace format function */
164 static u8 *
165 format_gbp_classify_trace (u8 * s, va_list * args)
166 {
167  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
168  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
169  gbp_classify_trace_t *t = va_arg (*args, gbp_classify_trace_t *);
170 
171  s = format (s, "src-epg:%d", t->src_epg);
172 
173  return s;
174 }
175 
176 /* *INDENT-OFF* */
178  .function = gbp_null_classify,
179  .name = "gbp-null-classify",
180  .vector_size = sizeof (u32),
181  .format_trace = format_gbp_classify_trace,
182  .type = VLIB_NODE_TYPE_INTERNAL,
183 
184  .n_errors = 0,
185  .n_next_nodes = 0,
186 };
187 
189 
191  .function = gbp_src_classify,
192  .name = "gbp-src-classify",
193  .vector_size = sizeof (u32),
194  .format_trace = format_gbp_classify_trace,
195  .type = VLIB_NODE_TYPE_INTERNAL,
196 
197  .n_errors = 0,
198  .n_next_nodes = 0,
199 };
200 
202 
204  .function = gbp_ip4_src_classify,
205  .name = "ip4-gbp-src-classify",
206  .vector_size = sizeof (u32),
207  .format_trace = format_gbp_classify_trace,
208  .type = VLIB_NODE_TYPE_INTERNAL,
209 
210  .n_errors = 0,
211  .n_next_nodes = 1,
212  .next_nodes = {
213  [0] = "ip4-lookup"
214  },
215 };
216 
218 
220  .function = gbp_ip6_src_classify,
221  .name = "ip6-gbp-src-classify",
222  .vector_size = sizeof (u32),
223  .format_trace = format_gbp_classify_trace,
224  .type = VLIB_NODE_TYPE_INTERNAL,
225 
226  .n_errors = 0,
227  .n_next_nodes = 1,
228  .next_nodes = {
229  [0] = "ip6-lookup"
230  },
231 };
232 
234 
235 VNET_FEATURE_INIT (gbp_ip4_src_classify_feat_node, static) =
236 {
237  .arc_name = "ip4-unicast",
238  .node_name = "ip4-gbp-src-classify",
239  .runs_before = VNET_FEATURES ("nat44-out2in"),
240 };
241 VNET_FEATURE_INIT (gbp_ip6_src_classify_feat_node, static) =
242 {
243  .arc_name = "ip6-unicast",
244  .node_name = "ip6-gbp-src-classify",
245  .runs_before = VNET_FEATURES ("nat66-out2in"),
246 };
247 
248 static clib_error_t *
250 {
252 
253  /* Initialize the feature next-node indexes */
255  gbp_src_classify_node.index,
264 
265  return 0;
266 }
267 
269 
270 /*
271  * fd.io coding-style-patch-verification: ON
272  *
273  * Local Variables:
274  * eval: (c-set-style "gnu")
275  * End:
276  */
static u8 * format_gbp_classify_trace(u8 *s, va_list *args)
Definition: gbp_classify.c:165
static uword gbp_null_classify(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: gbp_classify.c:142
#define CLIB_UNUSED(x)
Definition: clib.h:79
vlib_node_registration_t gbp_src_classify_node
(constructor) VLIB_REGISTER_NODE (gbp_src_classify_node)
Definition: gbp_classify.c:190
#define vnet_buffer2(b)
Definition: buffer.h:402
static gbp_src_classify_main_t gbp_src_classify_main
Definition: gbp_classify.c:39
static uword gbp_src_classify(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: gbp_classify.c:135
struct gbp_classify_trace_t_ gbp_classify_trace_t
per-packet trace data
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
unsigned char u8
Definition: types.h:56
static u32 vnet_l2_feature_next(vlib_buffer_t *b, u32 *next_nodes, u32 feat_bit)
Return the graph node index for the feature corresponding to the next set bit after clearing the curr...
Definition: feat_bitmap.h:94
#define GBP_SRC_N_CLASSIFY
Definition: gbp_classify.c:26
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:156
#define always_inline
Definition: clib.h:92
gbp_src_classify_type_t_
Definition: gbp_classify.c:20
static uword gbp_classify_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, gbp_src_classify_type_t type, u8 is_l3)
Definition: gbp_classify.c:54
static clib_error_t * gbp_src_classify_init(vlib_main_t *vm)
Definition: gbp_classify.c:249
u32 epg_id_t
Definition: gbp_types.h:21
struct gbp_src_classify_main_t_ gbp_src_classify_main_t
Grouping of global data for the GBP source EPG classification feature.
unsigned int u32
Definition: types.h:88
static uword gbp_ip4_src_classify(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: gbp_classify.c:149
static uword gbp_ip6_src_classify(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: gbp_classify.c:156
per-packet trace data
Definition: gbp_classify.c:44
#define PREDICT_FALSE(x)
Definition: clib.h:105
static u32 gbp_port_to_epg(u32 sw_if_index)
Get the source EPG for a port/interface.
Definition: gbp_endpoint.h:98
#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
enum gbp_src_classify_type_t_ gbp_src_classify_type_t
#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
vlib_node_registration_t gbp_ip6_src_classify_node
(constructor) VLIB_REGISTER_NODE (gbp_ip6_src_classify_node)
Definition: gbp_classify.c:219
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:153
u16 n_vectors
Definition: node.h:380
vlib_main_t * vm
Definition: buffer.c:294
Grouping of global data for the GBP source EPG classification feature.
Definition: gbp_classify.c:31
static void feat_bitmap_init_next_nodes(vlib_main_t *vm, u32 node_index, u32 num_features, char **feat_names, u32 *next_nodes)
Initialize the feature next-node indexes of a graph node.
Definition: feat_bitmap.h:43
u32 l2_input_feat_next[GBP_SRC_N_CLASSIFY][32]
Next nodes for L2 output features.
Definition: gbp_classify.c:36
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
char ** l2input_get_feat_names(void)
Return an array of strings containing graph node names of each feature.
Definition: l2_input.c:60
VLIB_NODE_FUNCTION_MULTIARCH(gbp_null_classify_node, gbp_null_classify)
#define VNET_FEATURES(...)
Definition: feature.h:391
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
vlib_node_registration_t gbp_ip4_src_classify_node
(constructor) VLIB_REGISTER_NODE (gbp_ip4_src_classify_node)
Definition: gbp_classify.c:203
u64 uword
Definition: types.h:112
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:360
VNET_FEATURE_INIT(gbp_ip4_src_classify_feat_node, static)
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:111
vlib_node_registration_t gbp_null_classify_node
(constructor) VLIB_REGISTER_NODE (gbp_null_classify_node)
Definition: gbp_classify.c:177
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