FD.io VPP  v18.07.1-19-g511ce25
Vector Packet Processing
gbp_fwd.c
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1 /*
2  * Copyright (c) 2018 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 <plugins/gbp/gbp.h>
17 
18 /**
19  * Grouping of global data for the GBP source EPG classification feature
20  */
21 typedef struct gbp_fwd_main_t_
22 {
23  /**
24  * Next nodes for L2 output features
25  */
28 
30 
31 #define foreach_gbp_fwd \
32  _(DROP, "drop") \
33  _(OUTPUT, "output")
34 
35 typedef enum
36 {
37 #define _(sym,str) GBP_FWD_ERROR_##sym,
39 #undef _
42 
43 static char *gbp_fwd_error_strings[] = {
44 #define _(sym,string) string,
46 #undef _
47 };
48 
49 typedef enum
50 {
51 #define _(sym,str) GBP_FWD_NEXT_##sym,
53 #undef _
56 
57 /**
58  * per-packet trace data
59  */
60 typedef struct gbp_fwd_trace_t_
61 {
62  /* per-pkt trace data */
66 
67 static uword
69 {
70  u32 n_left_from, *from, *to_next;
71  u32 next_index;
72 
73  next_index = 0;
74  n_left_from = frame->n_vectors;
75  from = vlib_frame_vector_args (frame);
76 
77  while (n_left_from > 0)
78  {
79  u32 n_left_to_next;
80 
81  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
82 
83  while (n_left_from > 0 && n_left_to_next > 0)
84  {
85  u32 bi0, sw_if_index0, src_epg;
86  gbp_fwd_next_t next0;
87  vlib_buffer_t *b0;
88 
89  next0 = GBP_FWD_NEXT_DROP;
90  bi0 = from[0];
91  to_next[0] = bi0;
92  from += 1;
93  to_next += 1;
94  n_left_from -= 1;
95  n_left_to_next -= 1;
96 
97  b0 = vlib_get_buffer (vm, bi0);
98 
99  /*
100  * lookup the uplink based on src EPG
101  */
102  src_epg = vnet_buffer2 (b0)->gbp.src_epg;
103 
104  sw_if_index0 = gbp_epg_itf_lookup (src_epg);
105 
106  if (~0 != sw_if_index0)
107  {
108  vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index0;
109 
110  next0 = GBP_FWD_NEXT_OUTPUT;
111  }
112  /*
113  * else
114  * don't know the uplink interface for this EPG => drop
115  */
116 
117  if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
118  {
119  gbp_fwd_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
120  t->src_epg = src_epg;
121  t->sw_if_index = sw_if_index0;
122  }
123 
124  /* verify speculative enqueue, maybe switch current next frame */
125  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
126  to_next, n_left_to_next,
127  bi0, next0);
128  }
129 
130  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
131  }
132 
133  return frame->n_vectors;
134 }
135 
136 /* packet trace format function */
137 static u8 *
138 format_gbp_fwd_trace (u8 * s, va_list * args)
139 {
140  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
141  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
142  gbp_fwd_trace_t *t = va_arg (*args, gbp_fwd_trace_t *);
143 
144  s = format (s, "src-epg:%d", t->src_epg);
145 
146  return s;
147 }
148 
149 /* *INDENT-OFF* */
151  .function = gbp_fwd,
152  .name = "gbp-fwd",
153  .vector_size = sizeof (u32),
154  .format_trace = format_gbp_fwd_trace,
155  .type = VLIB_NODE_TYPE_INTERNAL,
156 
157  .n_errors = ARRAY_LEN(gbp_fwd_error_strings),
158  .error_strings = gbp_fwd_error_strings,
159 
160  .n_next_nodes = GBP_FWD_N_NEXT,
161 
162  .next_nodes = {
163  [GBP_FWD_NEXT_DROP] = "error-drop",
164  [GBP_FWD_NEXT_OUTPUT] = "l2-output",
165  },
166 };
167 
169 
170 /* *INDENT-ON* */
171 
172 static clib_error_t *
174 {
176 
177  /* Initialize the feature next-node indices */
179  gbp_fwd_node.index,
182  gpm->l2_input_feat_next);
183 
184  return 0;
185 }
186 
188 
189 /*
190  * fd.io coding-style-patch-verification: ON
191  *
192  * Local Variables:
193  * eval: (c-set-style "gnu")
194  * End:
195  */
static gbp_fwd_main_t gbp_fwd_main
Definition: gbp_fwd.c:29
per-packet trace data
Definition: gbp_fwd.c:60
#define CLIB_UNUSED(x)
Definition: clib.h:79
struct gbp_fwd_main_t_ gbp_fwd_main_t
Grouping of global data for the GBP source EPG classification feature.
#define vnet_buffer2(b)
Definition: buffer.h:403
#define foreach_gbp_fwd
Definition: gbp_fwd.c:31
struct gbp_fwd_trace_t_ gbp_fwd_trace_t
per-packet trace data
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
epg_id_t src_epg
Definition: gbp_fwd.c:63
unsigned char u8
Definition: types.h:56
static u32 gbp_epg_itf_lookup(epg_id_t epg)
gbp_fwd_error_t
Definition: gbp_fwd.c:35
static char * gbp_fwd_error_strings[]
Definition: gbp_fwd.c:43
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:156
u32 epg_id_t
Definition: gbp_types.h:21
unsigned int u32
Definition: types.h:88
static clib_error_t * gbp_fwd_init(vlib_main_t *vm)
Definition: gbp_fwd.c:173
static uword gbp_fwd(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: gbp_fwd.c:68
#define PREDICT_FALSE(x)
Definition: clib.h:105
#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
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:153
VLIB_NODE_FUNCTION_MULTIARCH(gbp_fwd_node, gbp_fwd)
u16 n_vectors
Definition: node.h:380
vlib_main_t * vm
Definition: buffer.c:294
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
#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
char ** l2input_get_feat_names(void)
Return an array of strings containing graph node names of each feature.
Definition: l2_input.c:60
gbp_fwd_next_t
Definition: gbp_fwd.c:49
static u8 * format_gbp_fwd_trace(u8 *s, va_list *args)
Definition: gbp_fwd.c:138
vlib_node_registration_t gbp_fwd_node
(constructor) VLIB_REGISTER_NODE (gbp_fwd_node)
Definition: gbp_fwd.c:150
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
Definition: defs.h:47
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
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
Grouping of global data for the GBP source EPG classification feature.
Definition: gbp_fwd.c:21
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
u32 l2_input_feat_next[32]
Next nodes for L2 output features.
Definition: gbp_fwd.c:26