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Vector Packet Processing
span_api.c
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1 /*
2  *------------------------------------------------------------------
3  * span_api.c - span mirroring api
4  *
5  * Copyright (c) 2016 Cisco and/or its affiliates.
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at:
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  *------------------------------------------------------------------
18  */
19 
20 #include <vnet/vnet.h>
21 #include <vlibmemory/api.h>
22 
23 #include <vnet/interface.h>
24 #include <vnet/api_errno.h>
25 #include <vnet/span/span.h>
26 
27 #include <vnet/vnet_msg_enum.h>
28 
29 #define vl_typedefs /* define message structures */
30 #include <vnet/vnet_all_api_h.h>
31 #undef vl_typedefs
32 
33 #define vl_endianfun /* define message structures */
34 #include <vnet/vnet_all_api_h.h>
35 #undef vl_endianfun
36 
37 /* instantiate all the print functions we know about */
38 #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
39 #define vl_printfun
40 #include <vnet/vnet_all_api_h.h>
41 #undef vl_printfun
42 
44 
45 #define foreach_vpe_api_msg \
46 _(SW_INTERFACE_SPAN_ENABLE_DISABLE, sw_interface_span_enable_disable) \
47 _(SW_INTERFACE_SPAN_DUMP, sw_interface_span_dump) \
48 
49 static void
52 {
54  int rv;
55 
56  vlib_main_t *vm = vlib_get_main ();
57 
58  rv = span_add_delete_entry (vm, ntohl (mp->sw_if_index_from),
59  ntohl (mp->sw_if_index_to), mp->state);
60 
61  REPLY_MACRO (VL_API_SW_INTERFACE_SPAN_ENABLE_DISABLE_REPLY);
62 }
63 
64 static void
66 {
67 
69  span_interface_t *si;
71  span_main_t *sm = &span_main;
72 
74  if (!q)
75  return;
76 
77  /* *INDENT-OFF* */
78  vec_foreach (si, sm->interfaces)
80  {
81  clib_bitmap_t *b;
82  u32 i;
84  clib_bitmap_foreach (i, b, (
85  {
86  rmp = vl_msg_api_alloc (sizeof (*rmp));
87  memset (rmp, 0, sizeof (*rmp));
88  rmp->_vl_msg_id = ntohs (VL_API_SW_INTERFACE_SPAN_DETAILS);
89  rmp->context = mp->context;
90 
91  rmp->sw_if_index_from = htonl (si - sm->interfaces);
92  rmp->sw_if_index_to = htonl (i);
93  rmp->state = (u8) (clib_bitmap_get (si->rx_mirror_ports, i) +
94  clib_bitmap_get (si->tx_mirror_ports, i) * 2);
95 
96  vl_msg_api_send_shmem (q, (u8 *) & rmp);
97  }));
98  clib_bitmap_free (b);
99  }
100  /* *INDENT-ON* */
101 }
102 
103 /*
104  * vpe_api_hookup
105  * Add vpe's API message handlers to the table.
106  * vlib has alread mapped shared memory and
107  * added the client registration handlers.
108  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
109  */
110 #define vl_msg_name_crc_list
111 #include <vnet/vnet_all_api_h.h>
112 #undef vl_msg_name_crc_list
113 
114 static void
116 {
117 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
118  foreach_vl_msg_name_crc_span;
119 #undef _
120 }
121 
122 static clib_error_t *
124 {
125  api_main_t *am = &api_main;
126 
127 #define _(N,n) \
128  vl_msg_api_set_handlers(VL_API_##N, #n, \
129  vl_api_##n##_t_handler, \
130  vl_noop_handler, \
131  vl_api_##n##_t_endian, \
132  vl_api_##n##_t_print, \
133  sizeof(vl_api_##n##_t), 1);
135 #undef _
136 
137  /*
138  * Set up the (msg_name, crc, message-id) table
139  */
141 
142  return 0;
143 }
144 
146 
147 /*
148  * fd.io coding-style-patch-verification: ON
149  *
150  * Local Variables:
151  * eval: (c-set-style "gnu")
152  * End:
153  */
static void setup_message_id_table(api_main_t *am)
Definition: span_api.c:115
sll srl srl sll sra u16x4 i
Definition: vector_sse2.h:343
VLIB_API_INIT_FUNCTION(span_api_hookup)
void vl_msg_api_send_shmem(unix_shared_memory_queue_t *q, u8 *elem)
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
#define foreach_vpe_api_msg
Definition: span_api.c:45
static clib_error_t * span_api_hookup(vlib_main_t *vm)
Definition: span_api.c:123
int span_add_delete_entry(vlib_main_t *vm, u32 src_sw_if_index, u32 dst_sw_if_index, u8 state)
Definition: span.c:23
static void vl_api_sw_interface_span_dump_t_handler(vl_api_sw_interface_span_dump_t *mp)
Definition: span_api.c:65
unix_shared_memory_queue_t * vl_api_client_index_to_input_queue(u32 index)
api_main_t api_main
Definition: api_shared.c:39
#define clib_bitmap_foreach(i, ai, body)
Macro to iterate across set bits in a bitmap.
Definition: bitmap.h:361
Enable/Disable span to mirror traffic from one interface to another.
Definition: span.api:24
span_interface_t * interfaces
Definition: span.h:33
#define REPLY_MACRO(t)
Reply to SPAN enable/disable request.
Definition: span.api:35
span_main_t span_main
Definition: span.h:43
clib_bitmap_t * tx_mirror_ports
Definition: span.h:25
static void vl_api_sw_interface_span_enable_disable_t_handler(vl_api_sw_interface_span_enable_disable_t *mp)
Definition: span_api.c:51
void * vl_msg_api_alloc(int nbytes)
static uword * clib_bitmap_dup_or(uword *ai, uword *bi)
Logical operator across two bitmaps which duplicates the first bitmap.
SPAN dump request.
Definition: span.api:44
static uword clib_bitmap_get(uword *ai, uword i)
Gets the ith bit value from a bitmap.
Definition: bitmap.h:197
unsigned int u32
Definition: types.h:88
#define clib_bitmap_free(v)
Free a bitmap.
Definition: bitmap.h:92
u32 num_rx_mirror_ports
Definition: span.h:26
unsigned char u8
Definition: types.h:56
u32 num_tx_mirror_ports
Definition: span.h:27
clib_bitmap_t * rx_mirror_ports
Definition: span.h:24
uword clib_bitmap_t
Definition: bitmap.h:50
#define vec_foreach(var, vec)
Vector iterator.
struct _unix_shared_memory_queue unix_shared_memory_queue_t
Reply to SPAN dump request.
Definition: span.api:55