FD.io VPP  v19.01.3-6-g70449b9b9
Vector Packet Processing
memif_api.c
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1 /*
2  *------------------------------------------------------------------
3  * memif_api.c - memif api
4  *
5  * Copyright (c) 2017 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 <vlib/vlib.h>
21 #include <vnet/ethernet/ethernet.h>
22 #include <vlib/unix/unix.h>
23 #include <memif/memif.h>
24 #include <memif/private.h>
25 
26 #include <vlibapi/api.h>
27 #include <vlibmemory/api.h>
28 
29 
30 /* define message IDs */
31 #include <memif/memif_msg_enum.h>
32 
33 /* define message structures */
34 #define vl_typedefs
35 #include <memif/memif_all_api_h.h>
36 #undef vl_typedefs
37 
38 /* define generated endian-swappers */
39 #define vl_endianfun
40 #include <memif/memif_all_api_h.h>
41 #undef vl_endianfun
42 
43 /* instantiate all the print functions we know about */
44 #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
45 #define vl_printfun
46 #include <memif/memif_all_api_h.h>
47 #undef vl_printfun
48 
49 /* Get the API version number */
50 #define vl_api_version(n,v) static u32 api_version=(v);
51 #include <memif/memif_all_api_h.h>
52 #undef vl_api_version
53 
54 #define REPLY_MSG_ID_BASE mm->msg_id_base
56 
57 #define foreach_memif_plugin_api_msg \
58 _(MEMIF_SOCKET_FILENAME_ADD_DEL, memif_socket_filename_add_del) \
59 _(MEMIF_CREATE, memif_create) \
60 _(MEMIF_DELETE, memif_delete) \
61 _(MEMIF_SOCKET_FILENAME_DUMP, memif_socket_filename_dump) \
62 _(MEMIF_DUMP, memif_dump) \
63 
64 
65 /**
66  * @brief Message handler for memif_socket_filename_add_del API.
67  * @param mp the vl_api_memif_socket_filename_add_del_t API message
68  */
69 void
72 {
73  memif_main_t *mm = &memif_main;
74  u8 is_add;
75  u32 socket_id;
76  u32 len;
77  u8 *socket_filename;
78  vl_api_memif_socket_filename_add_del_reply_t *rmp;
79  int rv;
80 
81  /* is_add */
82  is_add = mp->is_add;
83 
84  /* socket_id */
85  socket_id = clib_net_to_host_u32 (mp->socket_id);
86  if (socket_id == 0 || socket_id == ~0)
87  {
88  rv = VNET_API_ERROR_INVALID_ARGUMENT;
89  goto reply;
90  }
91 
92  /* socket filename */
93  socket_filename = 0;
94  mp->socket_filename[ARRAY_LEN (mp->socket_filename) - 1] = 0;
95  len = strlen ((char *) mp->socket_filename);
96  if (len > 0)
97  {
98  vec_validate (socket_filename, len);
99  memcpy (socket_filename, mp->socket_filename, len);
100  }
101 
102  rv = memif_socket_filename_add_del (is_add, socket_id, socket_filename);
103 
104  vec_free (socket_filename);
105 
106 reply:
107  REPLY_MACRO (VL_API_MEMIF_SOCKET_FILENAME_ADD_DEL_REPLY);
108 }
109 
110 
111 /**
112  * @brief Message handler for memif_create API.
113  * @param mp vl_api_memif_create_t * mp the api message
114  */
115 void
117 {
118  memif_main_t *mm = &memif_main;
121  memif_create_if_args_t args = { 0 };
122  u32 ring_size = MEMIF_DEFAULT_RING_SIZE;
123  static const u8 empty_hw_addr[6];
124  int rv = 0;
125 
126  /* id */
127  args.id = clib_net_to_host_u32 (mp->id);
128 
129  /* socket-id */
130  args.socket_id = clib_net_to_host_u32 (mp->socket_id);
131 
132  /* secret */
133  mp->secret[ARRAY_LEN (mp->secret) - 1] = 0;
134  if (strlen ((char *) mp->secret) > 0)
135  {
136  vec_validate (args.secret, strlen ((char *) mp->secret));
137  strncpy ((char *) args.secret, (char *) mp->secret,
138  vec_len (args.secret));
139  }
140 
141  /* role */
142  args.is_master = (mp->role == 0);
143 
144  /* mode */
145  args.mode = mp->mode;
146 
147  /* rx/tx queues */
148  if (args.is_master == 0)
149  {
152  if (mp->rx_queues)
153  {
154  args.rx_queues = mp->rx_queues;
155  }
156  if (mp->tx_queues)
157  {
158  args.tx_queues = mp->tx_queues;
159  }
160  }
161 
162  /* ring size */
163  if (mp->ring_size)
164  {
165  ring_size = ntohl (mp->ring_size);
166  }
167  if (!is_pow2 (ring_size))
168  {
169  rv = VNET_API_ERROR_INVALID_ARGUMENT;
170  goto reply;
171  }
172  args.log2_ring_size = min_log2 (ring_size);
173 
174  /* buffer size */
176  if (mp->buffer_size)
177  {
178  args.buffer_size = ntohs (mp->buffer_size);
179  }
180 
181  /* MAC address */
182  if (memcmp (mp->hw_addr, empty_hw_addr, 6) != 0)
183  {
184  memcpy (args.hw_addr, mp->hw_addr, 6);
185  args.hw_addr_set = 1;
186  }
187 
188  rv = memif_create_if (vm, &args);
189 
190  vec_free (args.secret);
191 
192 reply:
193  /* *INDENT-OFF* */
194  REPLY_MACRO2 (VL_API_MEMIF_CREATE_REPLY,
195  ({
196  rmp->sw_if_index = htonl (args.sw_if_index);
197  }));
198  /* *INDENT-ON* */
199 }
200 
201 /**
202  * @brief Message handler for memif_delete API.
203  * @param mp vl_api_memif_delete_t * mp the api message
204  */
205 void
207 {
208  memif_main_t *mm = &memif_main;
210  vnet_main_t *vnm = vnet_get_main ();
211  vl_api_memif_delete_reply_t *rmp;
213  vnet_get_sup_hw_interface (vnm, ntohl (mp->sw_if_index));
214  memif_if_t *mif;
215  int rv = 0;
216 
217  if (hi == NULL || memif_device_class.index != hi->dev_class_index)
218  rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;
219  else
220  {
221  mif = pool_elt_at_index (mm->interfaces, hi->dev_instance);
222  rv = memif_delete_if (vm, mif);
223  }
224 
225  REPLY_MACRO (VL_API_MEMIF_DELETE_REPLY);
226 }
227 
228 static void
230  memif_if_t * mif,
231  vnet_sw_interface_t * swif,
232  u8 * interface_name, u32 context)
233 {
235  vnet_main_t *vnm = vnet_get_main ();
236  memif_main_t *mm = &memif_main;
237  vnet_hw_interface_t *hwif;
238  memif_socket_file_t *msf;
239 
240  hwif = vnet_get_sup_hw_interface (vnm, swif->sw_if_index);
241 
242  mp = vl_msg_api_alloc (sizeof (*mp));
243  clib_memset (mp, 0, sizeof (*mp));
244 
245  mp->_vl_msg_id = htons (VL_API_MEMIF_DETAILS + mm->msg_id_base);
246  mp->context = context;
247 
248  mp->sw_if_index = htonl (swif->sw_if_index);
249  strncpy ((char *) mp->if_name,
250  (char *) interface_name, ARRAY_LEN (mp->if_name) - 1);
251 
252  if (hwif->hw_address)
253  {
254  memcpy (mp->hw_addr, hwif->hw_address, ARRAY_LEN (mp->hw_addr));
255  }
256 
257  mp->id = clib_host_to_net_u32 (mif->id);
258 
260  mp->socket_id = clib_host_to_net_u32 (msf->socket_id);
261 
262  mp->role = (mif->flags & MEMIF_IF_FLAG_IS_SLAVE) ? 1 : 0;
263  mp->ring_size = htonl (1 << mif->run.log2_ring_size);
264  mp->buffer_size = htons (mif->run.buffer_size);
265 
266  mp->admin_up_down = (swif->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? 1 : 0;
267  mp->link_up_down = (hwif->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) ? 1 : 0;
268 
269  vl_api_send_msg (reg, (u8 *) mp);
270 }
271 
272 /**
273  * @brief Message handler for memif_dump API.
274  * @param mp vl_api_memif_dump_t * mp the api message
275  */
276 void
278 {
279  memif_main_t *mm = &memif_main;
280  vnet_main_t *vnm = vnet_get_main ();
281  vnet_sw_interface_t *swif;
282  memif_if_t *mif;
283  u8 *if_name = 0;
285 
287  if (!reg)
288  return;
289 
290  /* *INDENT-OFF* */
291  pool_foreach (mif, mm->interfaces,
292  ({
293  swif = vnet_get_sw_interface (vnm, mif->sw_if_index);
294 
295  if_name = format (if_name, "%U%c",
296  format_vnet_sw_interface_name,
297  vnm, swif, 0);
298 
299  send_memif_details (reg, mif, swif, if_name, mp->context);
300  _vec_len (if_name) = 0;
301  }));
302  /* *INDENT-ON* */
303 
304  vec_free (if_name);
305 }
306 
307 static void
309  u32 socket_id,
310  u8 * socket_filename, u32 context)
311 {
313  memif_main_t *mm = &memif_main;
314 
315  mp = vl_msg_api_alloc (sizeof (*mp));
316  clib_memset (mp, 0, sizeof (*mp));
317 
318  mp->_vl_msg_id = htons (VL_API_MEMIF_SOCKET_FILENAME_DETAILS
319  + mm->msg_id_base);
320  mp->context = context;
321 
322  mp->socket_id = clib_host_to_net_u32 (socket_id);
323  strncpy ((char *) mp->socket_filename,
324  (char *) socket_filename, ARRAY_LEN (mp->socket_filename) - 1);
325 
326  vl_api_send_msg (reg, (u8 *) mp);
327 }
328 
329 /**
330  * @brief Message handler for memif_socket_filename_dump API.
331  * @param mp vl_api_memif_socket_filename_dump_t api message
332  */
333 void
336 {
337  memif_main_t *mm = &memif_main;
339  u32 sock_id;
340  u32 msf_idx;
341 
343  if (!reg)
344  return;
345 
346  /* *INDENT-OFF* */
347  hash_foreach (sock_id, msf_idx, mm->socket_file_index_by_sock_id,
348  ({
349  memif_socket_file_t *msf;
350  u8 *filename;
351 
352  msf = pool_elt_at_index(mm->socket_files, msf_idx);
353  filename = msf->filename;
354  send_memif_socket_filename_details(reg, sock_id, filename, mp->context);
355  }));
356  /* *INDENT-ON* */
357 }
358 
359 #define vl_msg_name_crc_list
360 #include <memif/memif_all_api_h.h>
361 #undef vl_msg_name_crc_list
362 
363 static void
365 {
366 #define _(id,n,crc) \
367  vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id + mm->msg_id_base);
368  foreach_vl_msg_name_crc_memif;
369 #undef _
370 }
371 
372 /* Set up the API message handling tables */
373 clib_error_t *
375 {
376  memif_main_t *mm = &memif_main;
377  api_main_t *am = &api_main;
378  u8 *name;
379 
380  /* Construct the API name */
381  name = format (0, "memif_%08x%c", api_version, 0);
382 
383  /* Ask for a correctly-sized block of API message decode slots */
385  ((char *) name, VL_MSG_FIRST_AVAILABLE);
386 
387 #define _(N,n) \
388  vl_msg_api_set_handlers((VL_API_##N + mm->msg_id_base), \
389  #n, \
390  vl_api_##n##_t_handler, \
391  vl_noop_handler, \
392  vl_api_##n##_t_endian, \
393  vl_api_##n##_t_print, \
394  sizeof(vl_api_##n##_t), 1);
396 #undef _
397 
398  /*
399  * Set up the (msg_name, crc, message-id) table
400  */
401  setup_message_id_table (mm, am);
402 
403  vec_free (name);
404  return 0;
405 }
406 
407 /*
408  * fd.io coding-style-patch-verification: ON
409  *
410  * Local Variables:
411  * eval: (c-set-style "gnu")
412  * End:
413  */
memif_if_t * interfaces
Definition: private.h:240
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:439
vmrglw vmrglh hi
void vl_api_memif_dump_t_handler(vl_api_memif_dump_t *mp)
Message handler for memif_dump API.
Definition: memif_api.c:277
Create memory interface.
Definition: memif.api:51
struct memif_if_t::@498 run
Memory interface details structure.
Definition: memif.api:98
vnet_main_t * vnet_get_main(void)
Definition: misc.c:47
static vnet_hw_interface_t * vnet_get_sup_hw_interface(vnet_main_t *vnm, u32 sw_if_index)
Create memory interface response.
Definition: memif.api:73
Create or remove named socket file for memif interfaces.
Definition: memif.api:27
memif_socket_file_t * socket_files
Definition: private.h:243
memif_log2_ring_size_t log2_ring_size
Definition: private.h:182
#define REPLY_MACRO2(t, body)
#define NULL
Definition: clib.h:58
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
static void vl_api_send_msg(vl_api_registration_t *rp, u8 *elem)
Definition: api.h:34
memif_interface_mode_t mode
Definition: private.h:270
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
Delete memory interface.
Definition: memif.api:85
Dump all memory interfaces.
Definition: memif.api:156
void * vl_msg_api_alloc(int nbytes)
unsigned char u8
Definition: types.h:56
static uword min_log2(uword x)
Definition: clib.h:144
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:490
clib_error_t * memif_plugin_api_hookup(vlib_main_t *vm)
Definition: memif_api.c:374
void vl_api_memif_socket_filename_dump_t_handler(vl_api_memif_socket_filename_dump_t *mp)
Message handler for memif_socket_filename_dump API.
Definition: memif_api.c:335
uword socket_file_index
Definition: private.h:167
u16 buffer_size
Definition: private.h:185
memif_log2_ring_size_t log2_ring_size
Definition: private.h:271
vnet_hw_interface_flags_t flags
Definition: interface.h:516
#define hash_foreach(key_var, value_var, h, body)
Definition: hash.h:442
vnet_device_class_t memif_device_class
u16 msg_id_base
API message ID base.
Definition: private.h:237
unsigned int u32
Definition: types.h:88
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:511
static void setup_message_id_table(memif_main_t *mm, api_main_t *am)
Definition: memif_api.c:364
int memif_delete_if(vlib_main_t *vm, memif_if_t *mif)
Definition: memif.c:698
void vl_api_memif_create_t_handler(vl_api_memif_create_t *mp)
Message handler for memif_create API.
Definition: memif_api.c:116
#define REPLY_MACRO(t)
vnet_sw_interface_flags_t flags
Definition: interface.h:706
memif_interface_id_t id
Definition: private.h:265
int memif_create_if(vlib_main_t *vm, memif_create_if_args_t *args)
Definition: memif.c:778
#define MEMIF_DEFAULT_TX_QUEUES
Definition: private.h:24
u8 name[64]
Definition: memclnt.api:152
static void send_memif_details(vl_api_registration_t *reg, memif_if_t *mif, vnet_sw_interface_t *swif, u8 *interface_name, u32 context)
Definition: memif_api.c:229
u8 len
Definition: ip_types.api:49
API main structure, used by both vpp and binary API clients.
Definition: api_common.h:202
An API client registration, only in vpp/vlib.
Definition: api_common.h:45
vlib_main_t * vm
Definition: buffer.c:301
Memory interface details structure.
Definition: memif.api:131
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
static void send_memif_socket_filename_details(vl_api_registration_t *reg, u32 socket_id, u8 *socket_filename, u32 context)
Definition: memif_api.c:308
int memif_socket_filename_add_del(u8 is_add, u32 sock_id, u8 *sock_filename)
Definition: memif.c:619
#define ARRAY_LEN(x)
Definition: clib.h:62
static vl_api_registration_t * vl_api_client_index_to_registration(u32 index)
Definition: api.h:56
void vl_api_memif_delete_t_handler(vl_api_memif_delete_t *mp)
Message handler for memif_delete API.
Definition: memif_api.c:206
#define MEMIF_DEFAULT_BUFFER_SIZE
Definition: private.h:25
u32 flags
Definition: private.h:156
#define MEMIF_DEFAULT_RX_QUEUES
Definition: private.h:23
Dump the table of socket ids and corresponding filenames.
Definition: memif.api:109
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
static uword is_pow2(uword x)
Definition: clib.h:235
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
#define foreach_memif_plugin_api_msg
Definition: memif_api.c:57
memif_interface_id_t id
Definition: private.h:157
#define MEMIF_DEFAULT_RING_SIZE
Definition: private.h:22
uword * socket_file_index_by_sock_id
Definition: private.h:244
void vl_api_memif_socket_filename_add_del_t_handler(vl_api_memif_socket_filename_add_del_t *mp)
Message handler for memif_socket_filename_add_del API.
Definition: memif_api.c:71
memif_main_t memif_main
Definition: memif.c:43
api_main_t api_main
Definition: api_shared.c:35
u16 vl_msg_api_get_msg_ids(const char *name, int n)
Definition: api_shared.c:865