Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 1 | /* |
| 2 | *------------------------------------------------------------------ |
| 3 | * Copyright (c) 2017 Cisco and/or its affiliates. |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at: |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | *------------------------------------------------------------------ |
| 16 | */ |
| 17 | |
| 18 | #include <stdlib.h> |
| 19 | #include <stdio.h> |
| 20 | #include <stdint.h> |
| 21 | #include <arpa/inet.h> |
| 22 | #include <stddef.h> |
| 23 | #include <assert.h> |
| 24 | |
| 25 | #include <vpp-api/vapi/vapi_dbg.h> |
| 26 | #include <vpp-api/vapi/vapi.h> |
| 27 | #include <vpp-api/vapi/vapi_internal.h> |
| 28 | #include <vppinfra/types.h> |
Dave Barach | 59b2565 | 2017-09-10 15:04:27 -0400 | [diff] [blame] | 29 | #include <vppinfra/pool.h> |
| 30 | #include <vlib/vlib.h> |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 31 | #include <vlibapi/api_common.h> |
Florin Coras | e86a8ed | 2018-01-05 03:20:25 -0800 | [diff] [blame] | 32 | #include <vlibmemory/memory_client.h> |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 33 | |
Klement Sekera | dab732a | 2018-07-04 13:43:46 +0200 | [diff] [blame] | 34 | #include <vapi/memclnt.api.vapi.h> |
| 35 | |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 36 | /* we need to use control pings for some stuff and because we're forced to put |
| 37 | * the code in headers, we need a way to be able to grab the ids of these |
| 38 | * messages - so declare them here as extern */ |
| 39 | vapi_msg_id_t vapi_msg_id_control_ping = 0; |
| 40 | vapi_msg_id_t vapi_msg_id_control_ping_reply = 0; |
| 41 | |
Klement Sekera | dab732a | 2018-07-04 13:43:46 +0200 | [diff] [blame] | 42 | DEFINE_VAPI_MSG_IDS_MEMCLNT_API_JSON; |
Neale Ranns | 7baf63f | 2018-11-07 02:20:36 -0800 | [diff] [blame] | 43 | DEFINE_VAPI_MSG_IDS_VPE_API_JSON; |
Klement Sekera | dab732a | 2018-07-04 13:43:46 +0200 | [diff] [blame] | 44 | |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 45 | struct |
| 46 | { |
| 47 | size_t count; |
| 48 | vapi_message_desc_t **msgs; |
| 49 | size_t max_len_name_with_crc; |
| 50 | } __vapi_metadata; |
| 51 | |
| 52 | typedef struct |
| 53 | { |
| 54 | u32 context; |
| 55 | vapi_cb_t callback; |
| 56 | void *callback_ctx; |
| 57 | bool is_dump; |
| 58 | } vapi_req_t; |
| 59 | |
| 60 | static const u32 context_counter_mask = (1 << 31); |
| 61 | |
| 62 | typedef struct |
| 63 | { |
| 64 | vapi_error_e (*cb) (vapi_ctx_t ctx, void *callback_ctx, vapi_msg_id_t id, |
| 65 | void *payload); |
| 66 | void *ctx; |
| 67 | } vapi_generic_cb_with_ctx; |
| 68 | |
| 69 | typedef struct |
| 70 | { |
| 71 | vapi_error_e (*cb) (vapi_ctx_t ctx, void *callback_ctx, void *payload); |
| 72 | void *ctx; |
| 73 | } vapi_event_cb_with_ctx; |
| 74 | |
| 75 | struct vapi_ctx_s |
| 76 | { |
| 77 | vapi_mode_e mode; |
| 78 | int requests_size; /* size of the requests array (circular queue) */ |
| 79 | int requests_start; /* index of first request */ |
| 80 | int requests_count; /* number of used slots */ |
| 81 | vapi_req_t *requests; |
| 82 | u32 context_counter; |
| 83 | vapi_generic_cb_with_ctx generic_cb; |
| 84 | vapi_event_cb_with_ctx *event_cbs; |
| 85 | u16 *vapi_msg_id_t_to_vl_msg_id; |
| 86 | u16 vl_msg_id_max; |
| 87 | vapi_msg_id_t *vl_msg_id_to_vapi_msg_t; |
| 88 | bool connected; |
Klement Sekera | dab732a | 2018-07-04 13:43:46 +0200 | [diff] [blame] | 89 | bool handle_keepalives; |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 90 | pthread_mutex_t requests_mutex; |
| 91 | }; |
| 92 | |
| 93 | u32 |
| 94 | vapi_gen_req_context (vapi_ctx_t ctx) |
| 95 | { |
| 96 | ++ctx->context_counter; |
| 97 | ctx->context_counter %= context_counter_mask; |
| 98 | return ctx->context_counter | context_counter_mask; |
| 99 | } |
| 100 | |
| 101 | size_t |
| 102 | vapi_get_request_count (vapi_ctx_t ctx) |
| 103 | { |
| 104 | return ctx->requests_count; |
| 105 | } |
| 106 | |
| 107 | bool |
| 108 | vapi_requests_full (vapi_ctx_t ctx) |
| 109 | { |
| 110 | return (ctx->requests_count == ctx->requests_size); |
| 111 | } |
| 112 | |
Klement Sekera | dc15be2 | 2017-06-12 06:49:33 +0200 | [diff] [blame] | 113 | bool |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 114 | vapi_requests_empty (vapi_ctx_t ctx) |
| 115 | { |
| 116 | return (0 == ctx->requests_count); |
| 117 | } |
| 118 | |
| 119 | static int |
| 120 | vapi_requests_end (vapi_ctx_t ctx) |
| 121 | { |
| 122 | return (ctx->requests_start + ctx->requests_count) % ctx->requests_size; |
| 123 | } |
| 124 | |
| 125 | void |
| 126 | vapi_store_request (vapi_ctx_t ctx, u32 context, bool is_dump, |
| 127 | vapi_cb_t callback, void *callback_ctx) |
| 128 | { |
| 129 | assert (!vapi_requests_full (ctx)); |
| 130 | /* if the mutex is not held, bad things will happen */ |
| 131 | assert (0 != pthread_mutex_trylock (&ctx->requests_mutex)); |
| 132 | const int requests_end = vapi_requests_end (ctx); |
| 133 | vapi_req_t *slot = &ctx->requests[requests_end]; |
| 134 | slot->is_dump = is_dump; |
| 135 | slot->context = context; |
| 136 | slot->callback = callback; |
| 137 | slot->callback_ctx = callback_ctx; |
| 138 | VAPI_DBG ("stored@%d: context:%x (start is @%d)", requests_end, context, |
| 139 | ctx->requests_start); |
| 140 | ++ctx->requests_count; |
| 141 | assert (!vapi_requests_empty (ctx)); |
| 142 | } |
| 143 | |
| 144 | #if VAPI_DEBUG_ALLOC |
| 145 | struct to_be_freed_s; |
| 146 | struct to_be_freed_s |
| 147 | { |
| 148 | void *v; |
| 149 | struct to_be_freed_s *next; |
| 150 | }; |
| 151 | |
| 152 | static struct to_be_freed_s *to_be_freed = NULL; |
| 153 | |
| 154 | void |
| 155 | vapi_add_to_be_freed (void *v) |
| 156 | { |
| 157 | struct to_be_freed_s *prev = NULL; |
| 158 | struct to_be_freed_s *tmp; |
| 159 | tmp = to_be_freed; |
| 160 | while (tmp && tmp->v) |
| 161 | { |
| 162 | prev = tmp; |
| 163 | tmp = tmp->next; |
| 164 | } |
| 165 | if (!tmp) |
| 166 | { |
| 167 | if (!prev) |
| 168 | { |
| 169 | tmp = to_be_freed = calloc (1, sizeof (*to_be_freed)); |
| 170 | } |
| 171 | else |
| 172 | { |
| 173 | tmp = prev->next = calloc (1, sizeof (*to_be_freed)); |
| 174 | } |
| 175 | } |
| 176 | VAPI_DBG ("To be freed %p", v); |
| 177 | tmp->v = v; |
| 178 | } |
| 179 | |
| 180 | void |
| 181 | vapi_trace_free (void *v) |
| 182 | { |
| 183 | struct to_be_freed_s *tmp = to_be_freed; |
| 184 | while (tmp && tmp->v != v) |
| 185 | { |
| 186 | tmp = tmp->next; |
| 187 | } |
| 188 | if (tmp && tmp->v == v) |
| 189 | { |
| 190 | VAPI_DBG ("Freed %p", v); |
| 191 | tmp->v = NULL; |
| 192 | } |
| 193 | else |
| 194 | { |
| 195 | VAPI_ERR ("Trying to free untracked pointer %p", v); |
| 196 | abort (); |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | void |
| 201 | vapi_to_be_freed_validate () |
| 202 | { |
| 203 | struct to_be_freed_s *tmp = to_be_freed; |
| 204 | while (tmp) |
| 205 | { |
| 206 | if (tmp->v) |
| 207 | { |
| 208 | VAPI_ERR ("Unfreed msg %p!", tmp->v); |
| 209 | } |
| 210 | tmp = tmp->next; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | #endif |
| 215 | |
| 216 | void * |
| 217 | vapi_msg_alloc (vapi_ctx_t ctx, size_t size) |
| 218 | { |
| 219 | if (!ctx->connected) |
| 220 | { |
| 221 | return NULL; |
| 222 | } |
| 223 | void *rv = vl_msg_api_alloc_or_null (size); |
| 224 | return rv; |
| 225 | } |
| 226 | |
| 227 | void |
| 228 | vapi_msg_free (vapi_ctx_t ctx, void *msg) |
| 229 | { |
| 230 | if (!ctx->connected) |
| 231 | { |
| 232 | return; |
| 233 | } |
| 234 | #if VAPI_DEBUG_ALLOC |
| 235 | vapi_trace_free (msg); |
| 236 | #endif |
| 237 | vl_msg_api_free (msg); |
| 238 | } |
| 239 | |
Klement Sekera | dc15be2 | 2017-06-12 06:49:33 +0200 | [diff] [blame] | 240 | vapi_msg_id_t |
| 241 | vapi_lookup_vapi_msg_id_t (vapi_ctx_t ctx, u16 vl_msg_id) |
| 242 | { |
| 243 | if (vl_msg_id <= ctx->vl_msg_id_max) |
| 244 | { |
| 245 | return ctx->vl_msg_id_to_vapi_msg_t[vl_msg_id]; |
| 246 | } |
Klement Sekera | dab732a | 2018-07-04 13:43:46 +0200 | [diff] [blame] | 247 | return VAPI_INVALID_MSG_ID; |
Klement Sekera | dc15be2 | 2017-06-12 06:49:33 +0200 | [diff] [blame] | 248 | } |
| 249 | |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 250 | vapi_error_e |
| 251 | vapi_ctx_alloc (vapi_ctx_t * result) |
| 252 | { |
| 253 | vapi_ctx_t ctx = calloc (1, sizeof (struct vapi_ctx_s)); |
| 254 | if (!ctx) |
| 255 | { |
| 256 | return VAPI_ENOMEM; |
| 257 | } |
| 258 | ctx->context_counter = 0; |
| 259 | ctx->vapi_msg_id_t_to_vl_msg_id = |
| 260 | malloc (__vapi_metadata.count * |
| 261 | sizeof (*ctx->vapi_msg_id_t_to_vl_msg_id)); |
| 262 | if (!ctx->vapi_msg_id_t_to_vl_msg_id) |
| 263 | { |
| 264 | goto fail; |
| 265 | } |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 266 | clib_memset (ctx->vapi_msg_id_t_to_vl_msg_id, ~0, |
| 267 | __vapi_metadata.count * |
| 268 | sizeof (*ctx->vapi_msg_id_t_to_vl_msg_id)); |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 269 | ctx->event_cbs = calloc (__vapi_metadata.count, sizeof (*ctx->event_cbs)); |
| 270 | if (!ctx->event_cbs) |
| 271 | { |
| 272 | goto fail; |
| 273 | } |
| 274 | pthread_mutex_init (&ctx->requests_mutex, NULL); |
| 275 | *result = ctx; |
| 276 | return VAPI_OK; |
| 277 | fail: |
| 278 | vapi_ctx_free (ctx); |
| 279 | return VAPI_ENOMEM; |
| 280 | } |
| 281 | |
| 282 | void |
| 283 | vapi_ctx_free (vapi_ctx_t ctx) |
| 284 | { |
| 285 | assert (!ctx->connected); |
| 286 | free (ctx->requests); |
| 287 | free (ctx->vapi_msg_id_t_to_vl_msg_id); |
| 288 | free (ctx->event_cbs); |
| 289 | free (ctx->vl_msg_id_to_vapi_msg_t); |
| 290 | pthread_mutex_destroy (&ctx->requests_mutex); |
| 291 | free (ctx); |
| 292 | } |
| 293 | |
| 294 | bool |
| 295 | vapi_is_msg_available (vapi_ctx_t ctx, vapi_msg_id_t id) |
| 296 | { |
| 297 | return vapi_lookup_vl_msg_id (ctx, id) != UINT16_MAX; |
| 298 | } |
| 299 | |
| 300 | vapi_error_e |
| 301 | vapi_connect (vapi_ctx_t ctx, const char *name, |
| 302 | const char *chroot_prefix, |
| 303 | int max_outstanding_requests, |
Klement Sekera | dab732a | 2018-07-04 13:43:46 +0200 | [diff] [blame] | 304 | int response_queue_size, vapi_mode_e mode, |
| 305 | bool handle_keepalives) |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 306 | { |
| 307 | if (response_queue_size <= 0 || max_outstanding_requests <= 0) |
| 308 | { |
| 309 | return VAPI_EINVAL; |
| 310 | } |
Klement Sekera | 7ff0a26 | 2018-09-03 12:35:27 +0200 | [diff] [blame] | 311 | if (!clib_mem_get_per_cpu_heap () && !clib_mem_init (0, 1024 * 1024 * 32)) |
| 312 | { |
| 313 | return VAPI_ENOMEM; |
| 314 | } |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 315 | ctx->requests_size = max_outstanding_requests; |
| 316 | const size_t size = ctx->requests_size * sizeof (*ctx->requests); |
| 317 | void *tmp = realloc (ctx->requests, size); |
| 318 | if (!tmp) |
| 319 | { |
| 320 | return VAPI_ENOMEM; |
| 321 | } |
| 322 | ctx->requests = tmp; |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 323 | clib_memset (ctx->requests, 0, size); |
Chris Luke | 879ace3 | 2017-09-26 13:15:16 -0400 | [diff] [blame] | 324 | /* coverity[MISSING_LOCK] - 177211 requests_mutex is not needed here */ |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 325 | ctx->requests_start = ctx->requests_count = 0; |
| 326 | if (chroot_prefix) |
| 327 | { |
| 328 | VAPI_DBG ("set memory root path `%s'", chroot_prefix); |
| 329 | vl_set_memory_root_path ((char *) chroot_prefix); |
| 330 | } |
| 331 | static char api_map[] = "/vpe-api"; |
| 332 | VAPI_DBG ("client api map `%s'", api_map); |
| 333 | if ((vl_client_api_map (api_map)) < 0) |
| 334 | { |
| 335 | return VAPI_EMAP_FAIL; |
| 336 | } |
| 337 | VAPI_DBG ("connect client `%s'", name); |
| 338 | if (vl_client_connect ((char *) name, 0, response_queue_size) < 0) |
| 339 | { |
| 340 | vl_client_api_unmap (); |
| 341 | return VAPI_ECON_FAIL; |
| 342 | } |
| 343 | #if VAPI_DEBUG_CONNECT |
| 344 | VAPI_DBG ("start probing messages"); |
| 345 | #endif |
| 346 | int rv; |
| 347 | int i; |
| 348 | for (i = 0; i < __vapi_metadata.count; ++i) |
| 349 | { |
| 350 | vapi_message_desc_t *m = __vapi_metadata.msgs[i]; |
| 351 | u8 scratch[m->name_with_crc_len + 1]; |
| 352 | memcpy (scratch, m->name_with_crc, m->name_with_crc_len + 1); |
Florin Coras | e86a8ed | 2018-01-05 03:20:25 -0800 | [diff] [blame] | 353 | u32 id = vl_msg_api_get_msg_index (scratch); |
Klement Sekera | dab732a | 2018-07-04 13:43:46 +0200 | [diff] [blame] | 354 | if (VAPI_INVALID_MSG_ID != id) |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 355 | { |
| 356 | if (id > UINT16_MAX) |
| 357 | { |
| 358 | VAPI_ERR ("Returned vl_msg_id `%u' > UINT16MAX `%u'!", id, |
| 359 | UINT16_MAX); |
| 360 | rv = VAPI_EINVAL; |
| 361 | goto fail; |
| 362 | } |
| 363 | if (id > ctx->vl_msg_id_max) |
| 364 | { |
| 365 | vapi_msg_id_t *tmp = realloc (ctx->vl_msg_id_to_vapi_msg_t, |
| 366 | sizeof |
| 367 | (*ctx->vl_msg_id_to_vapi_msg_t) * |
| 368 | (id + 1)); |
| 369 | if (!tmp) |
| 370 | { |
| 371 | rv = VAPI_ENOMEM; |
| 372 | goto fail; |
| 373 | } |
| 374 | ctx->vl_msg_id_to_vapi_msg_t = tmp; |
| 375 | ctx->vl_msg_id_max = id; |
| 376 | } |
| 377 | ctx->vl_msg_id_to_vapi_msg_t[id] = m->id; |
| 378 | ctx->vapi_msg_id_t_to_vl_msg_id[m->id] = id; |
| 379 | #if VAPI_DEBUG_CONNECT |
| 380 | VAPI_DBG ("Message `%s' has vl_msg_id `%u'", m->name_with_crc, |
| 381 | (unsigned) id); |
| 382 | #endif |
| 383 | } |
| 384 | else |
| 385 | { |
| 386 | ctx->vapi_msg_id_t_to_vl_msg_id[m->id] = UINT16_MAX; |
| 387 | VAPI_DBG ("Message `%s' not available", m->name_with_crc); |
| 388 | } |
| 389 | } |
| 390 | #if VAPI_DEBUG_CONNECT |
| 391 | VAPI_DBG ("finished probing messages"); |
| 392 | #endif |
| 393 | if (!vapi_is_msg_available (ctx, vapi_msg_id_control_ping) || |
| 394 | !vapi_is_msg_available (ctx, vapi_msg_id_control_ping_reply)) |
| 395 | { |
| 396 | VAPI_ERR |
| 397 | ("control ping or control ping reply not available, cannot connect"); |
| 398 | rv = VAPI_EINCOMPATIBLE; |
| 399 | goto fail; |
| 400 | } |
| 401 | ctx->mode = mode; |
| 402 | ctx->connected = true; |
Klement Sekera | dab732a | 2018-07-04 13:43:46 +0200 | [diff] [blame] | 403 | if (vapi_is_msg_available (ctx, vapi_msg_id_memclnt_keepalive)) |
| 404 | { |
| 405 | ctx->handle_keepalives = handle_keepalives; |
| 406 | } |
| 407 | else |
| 408 | { |
| 409 | ctx->handle_keepalives = false; |
| 410 | } |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 411 | return VAPI_OK; |
| 412 | fail: |
| 413 | vl_client_disconnect (); |
| 414 | vl_client_api_unmap (); |
| 415 | return rv; |
| 416 | } |
| 417 | |
| 418 | vapi_error_e |
| 419 | vapi_disconnect (vapi_ctx_t ctx) |
| 420 | { |
| 421 | if (!ctx->connected) |
| 422 | { |
| 423 | return VAPI_EINVAL; |
| 424 | } |
| 425 | vl_client_disconnect (); |
| 426 | vl_client_api_unmap (); |
| 427 | #if VAPI_DEBUG_ALLOC |
| 428 | vapi_to_be_freed_validate (); |
| 429 | #endif |
| 430 | ctx->connected = false; |
| 431 | return VAPI_OK; |
| 432 | } |
| 433 | |
| 434 | vapi_error_e |
| 435 | vapi_get_fd (vapi_ctx_t ctx, int *fd) |
| 436 | { |
| 437 | return VAPI_ENOTSUP; |
| 438 | } |
| 439 | |
| 440 | vapi_error_e |
| 441 | vapi_send (vapi_ctx_t ctx, void *msg) |
| 442 | { |
| 443 | vapi_error_e rv = VAPI_OK; |
| 444 | if (!ctx || !msg || !ctx->connected) |
| 445 | { |
| 446 | rv = VAPI_EINVAL; |
| 447 | goto out; |
| 448 | } |
| 449 | int tmp; |
Florin Coras | e86a8ed | 2018-01-05 03:20:25 -0800 | [diff] [blame] | 450 | svm_queue_t *q = api_main.shmem_hdr->vl_input_queue; |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 451 | #if VAPI_DEBUG |
| 452 | unsigned msgid = be16toh (*(u16 *) msg); |
| 453 | if (msgid <= ctx->vl_msg_id_max) |
| 454 | { |
| 455 | vapi_msg_id_t id = ctx->vl_msg_id_to_vapi_msg_t[msgid]; |
| 456 | if (id < __vapi_metadata.count) |
| 457 | { |
Klement Sekera | dc15be2 | 2017-06-12 06:49:33 +0200 | [diff] [blame] | 458 | VAPI_DBG ("send msg@%p:%u[%s]", msg, msgid, |
| 459 | __vapi_metadata.msgs[id]->name); |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 460 | } |
| 461 | else |
| 462 | { |
Klement Sekera | dc15be2 | 2017-06-12 06:49:33 +0200 | [diff] [blame] | 463 | VAPI_DBG ("send msg@%p:%u[UNKNOWN]", msg, msgid); |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 464 | } |
| 465 | } |
| 466 | else |
| 467 | { |
Klement Sekera | dc15be2 | 2017-06-12 06:49:33 +0200 | [diff] [blame] | 468 | VAPI_DBG ("send msg@%p:%u[UNKNOWN]", msg, msgid); |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 469 | } |
| 470 | #endif |
Florin Coras | e86a8ed | 2018-01-05 03:20:25 -0800 | [diff] [blame] | 471 | tmp = svm_queue_add (q, (u8 *) & msg, |
| 472 | VAPI_MODE_BLOCKING == ctx->mode ? 0 : 1); |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 473 | if (tmp < 0) |
| 474 | { |
| 475 | rv = VAPI_EAGAIN; |
| 476 | } |
Benoît Ganne | 9fb6d40 | 2019-04-15 15:28:21 +0200 | [diff] [blame^] | 477 | else |
| 478 | VL_MSG_API_POISON (msg); |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 479 | out: |
| 480 | VAPI_DBG ("vapi_send() rv = %d", rv); |
| 481 | return rv; |
| 482 | } |
| 483 | |
| 484 | vapi_error_e |
| 485 | vapi_send2 (vapi_ctx_t ctx, void *msg1, void *msg2) |
| 486 | { |
| 487 | vapi_error_e rv = VAPI_OK; |
| 488 | if (!ctx || !msg1 || !msg2 || !ctx->connected) |
| 489 | { |
| 490 | rv = VAPI_EINVAL; |
| 491 | goto out; |
| 492 | } |
Florin Coras | e86a8ed | 2018-01-05 03:20:25 -0800 | [diff] [blame] | 493 | svm_queue_t *q = api_main.shmem_hdr->vl_input_queue; |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 494 | #if VAPI_DEBUG |
| 495 | unsigned msgid1 = be16toh (*(u16 *) msg1); |
| 496 | unsigned msgid2 = be16toh (*(u16 *) msg2); |
| 497 | const char *name1 = "UNKNOWN"; |
| 498 | const char *name2 = "UNKNOWN"; |
| 499 | if (msgid1 <= ctx->vl_msg_id_max) |
| 500 | { |
| 501 | vapi_msg_id_t id = ctx->vl_msg_id_to_vapi_msg_t[msgid1]; |
| 502 | if (id < __vapi_metadata.count) |
| 503 | { |
| 504 | name1 = __vapi_metadata.msgs[id]->name; |
| 505 | } |
| 506 | } |
| 507 | if (msgid2 <= ctx->vl_msg_id_max) |
| 508 | { |
| 509 | vapi_msg_id_t id = ctx->vl_msg_id_to_vapi_msg_t[msgid2]; |
| 510 | if (id < __vapi_metadata.count) |
| 511 | { |
| 512 | name2 = __vapi_metadata.msgs[id]->name; |
| 513 | } |
| 514 | } |
| 515 | VAPI_DBG ("send two: %u[%s], %u[%s]", msgid1, name1, msgid2, name2); |
| 516 | #endif |
Florin Coras | e86a8ed | 2018-01-05 03:20:25 -0800 | [diff] [blame] | 517 | int tmp = svm_queue_add2 (q, (u8 *) & msg1, (u8 *) & msg2, |
| 518 | VAPI_MODE_BLOCKING == ctx->mode ? 0 : 1); |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 519 | if (tmp < 0) |
| 520 | { |
| 521 | rv = VAPI_EAGAIN; |
| 522 | } |
Benoît Ganne | 9fb6d40 | 2019-04-15 15:28:21 +0200 | [diff] [blame^] | 523 | else |
| 524 | VL_MSG_API_POISON (msg1); |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 525 | out: |
| 526 | VAPI_DBG ("vapi_send() rv = %d", rv); |
| 527 | return rv; |
| 528 | } |
| 529 | |
| 530 | vapi_error_e |
Mohsin Kazmi | 3fca567 | 2018-01-04 18:57:26 +0100 | [diff] [blame] | 531 | vapi_recv (vapi_ctx_t ctx, void **msg, size_t * msg_size, |
| 532 | svm_q_conditional_wait_t cond, u32 time) |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 533 | { |
| 534 | if (!ctx || !ctx->connected || !msg || !msg_size) |
| 535 | { |
| 536 | return VAPI_EINVAL; |
| 537 | } |
| 538 | vapi_error_e rv = VAPI_OK; |
| 539 | api_main_t *am = &api_main; |
| 540 | uword data; |
| 541 | |
| 542 | if (am->our_pid == 0) |
| 543 | { |
| 544 | return VAPI_EINVAL; |
| 545 | } |
| 546 | |
Florin Coras | e86a8ed | 2018-01-05 03:20:25 -0800 | [diff] [blame] | 547 | svm_queue_t *q = am->vl_input_queue; |
Klement Sekera | dab732a | 2018-07-04 13:43:46 +0200 | [diff] [blame] | 548 | again: |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 549 | VAPI_DBG ("doing shm queue sub"); |
Mohsin Kazmi | 3fca567 | 2018-01-04 18:57:26 +0100 | [diff] [blame] | 550 | |
| 551 | int tmp = svm_queue_sub (q, (u8 *) & data, cond, time); |
| 552 | |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 553 | if (tmp == 0) |
| 554 | { |
Benoît Ganne | 9fb6d40 | 2019-04-15 15:28:21 +0200 | [diff] [blame^] | 555 | VL_MSG_API_UNPOISON ((void *) data); |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 556 | #if VAPI_DEBUG_ALLOC |
| 557 | vapi_add_to_be_freed ((void *) data); |
| 558 | #endif |
| 559 | msgbuf_t *msgbuf = |
| 560 | (msgbuf_t *) ((u8 *) data - offsetof (msgbuf_t, data)); |
| 561 | if (!msgbuf->data_len) |
| 562 | { |
| 563 | vapi_msg_free (ctx, (u8 *) data); |
| 564 | return VAPI_EAGAIN; |
| 565 | } |
| 566 | *msg = (u8 *) data; |
| 567 | *msg_size = ntohl (msgbuf->data_len); |
Klement Sekera | dc15be2 | 2017-06-12 06:49:33 +0200 | [diff] [blame] | 568 | #if VAPI_DEBUG |
| 569 | unsigned msgid = be16toh (*(u16 *) * msg); |
| 570 | if (msgid <= ctx->vl_msg_id_max) |
| 571 | { |
| 572 | vapi_msg_id_t id = ctx->vl_msg_id_to_vapi_msg_t[msgid]; |
| 573 | if (id < __vapi_metadata.count) |
| 574 | { |
| 575 | VAPI_DBG ("recv msg@%p:%u[%s]", *msg, msgid, |
| 576 | __vapi_metadata.msgs[id]->name); |
| 577 | } |
| 578 | else |
| 579 | { |
| 580 | VAPI_DBG ("recv msg@%p:%u[UNKNOWN]", *msg, msgid); |
| 581 | } |
| 582 | } |
| 583 | else |
| 584 | { |
| 585 | VAPI_DBG ("recv msg@%p:%u[UNKNOWN]", *msg, msgid); |
| 586 | } |
| 587 | #endif |
Klement Sekera | dab732a | 2018-07-04 13:43:46 +0200 | [diff] [blame] | 588 | if (ctx->handle_keepalives) |
| 589 | { |
| 590 | unsigned msgid = be16toh (*(u16 *) * msg); |
| 591 | if (msgid == |
| 592 | vapi_lookup_vl_msg_id (ctx, vapi_msg_id_memclnt_keepalive)) |
| 593 | { |
| 594 | vapi_msg_memclnt_keepalive_reply *reply = NULL; |
| 595 | do |
| 596 | { |
| 597 | reply = vapi_msg_alloc (ctx, sizeof (*reply)); |
| 598 | } |
| 599 | while (!reply); |
| 600 | reply->header.context = vapi_get_client_index (ctx); |
| 601 | reply->header._vl_msg_id = |
| 602 | vapi_lookup_vl_msg_id (ctx, |
| 603 | vapi_msg_id_memclnt_keepalive_reply); |
| 604 | reply->payload.retval = 0; |
| 605 | vapi_msg_memclnt_keepalive_reply_hton (reply); |
| 606 | while (VAPI_EAGAIN == vapi_send (ctx, reply)); |
| 607 | vapi_msg_free (ctx, *msg); |
| 608 | VAPI_DBG ("autohandled memclnt_keepalive"); |
| 609 | goto again; |
| 610 | } |
| 611 | } |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 612 | } |
| 613 | else |
| 614 | { |
| 615 | rv = VAPI_EAGAIN; |
| 616 | } |
| 617 | return rv; |
| 618 | } |
| 619 | |
| 620 | vapi_error_e |
| 621 | vapi_wait (vapi_ctx_t ctx, vapi_wait_mode_e mode) |
| 622 | { |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 623 | return VAPI_ENOTSUP; |
| 624 | } |
| 625 | |
| 626 | static vapi_error_e |
| 627 | vapi_dispatch_response (vapi_ctx_t ctx, vapi_msg_id_t id, |
| 628 | u32 context, void *msg) |
| 629 | { |
| 630 | int mrv; |
| 631 | if (0 != (mrv = pthread_mutex_lock (&ctx->requests_mutex))) |
| 632 | { |
| 633 | VAPI_DBG ("pthread_mutex_lock() failed, rv=%d:%s", mrv, strerror (mrv)); |
| 634 | return VAPI_MUTEX_FAILURE; |
| 635 | } |
| 636 | int tmp = ctx->requests_start; |
| 637 | const int requests_end = vapi_requests_end (ctx); |
| 638 | while (ctx->requests[tmp].context != context && tmp != requests_end) |
| 639 | { |
| 640 | ++tmp; |
| 641 | if (tmp == ctx->requests_size) |
| 642 | { |
| 643 | tmp = 0; |
| 644 | } |
| 645 | } |
| 646 | VAPI_DBG ("dispatch, search from %d, %s at %d", ctx->requests_start, |
| 647 | ctx->requests[tmp].context == context ? "matched" : "stopped", |
| 648 | tmp); |
| 649 | vapi_error_e rv = VAPI_OK; |
| 650 | if (ctx->requests[tmp].context == context) |
| 651 | { |
| 652 | while (ctx->requests_start != tmp) |
| 653 | { |
| 654 | VAPI_ERR ("No response to req with context=%u", |
| 655 | (unsigned) ctx->requests[tmp].context); |
Klement Sekera | dab732a | 2018-07-04 13:43:46 +0200 | [diff] [blame] | 656 | ctx->requests[ctx->requests_start].callback (ctx, ctx->requests |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 657 | [ctx-> |
| 658 | requests_start].callback_ctx, |
| 659 | VAPI_ENORESP, true, |
| 660 | NULL); |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 661 | clib_memset (&ctx->requests[ctx->requests_start], 0, |
| 662 | sizeof (ctx->requests[ctx->requests_start])); |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 663 | ++ctx->requests_start; |
| 664 | --ctx->requests_count; |
| 665 | if (ctx->requests_start == ctx->requests_size) |
| 666 | { |
| 667 | ctx->requests_start = 0; |
| 668 | } |
| 669 | } |
| 670 | // now ctx->requests_start == tmp |
| 671 | int payload_offset = vapi_get_payload_offset (id); |
| 672 | void *payload = ((u8 *) msg) + payload_offset; |
| 673 | bool is_last = true; |
| 674 | if (ctx->requests[tmp].is_dump) |
| 675 | { |
| 676 | if (vapi_msg_id_control_ping_reply == id) |
| 677 | { |
| 678 | payload = NULL; |
| 679 | } |
| 680 | else |
| 681 | { |
| 682 | is_last = false; |
| 683 | } |
| 684 | } |
| 685 | if (payload_offset != -1) |
| 686 | { |
| 687 | rv = |
| 688 | ctx->requests[tmp].callback (ctx, ctx->requests[tmp].callback_ctx, |
| 689 | VAPI_OK, is_last, payload); |
| 690 | } |
| 691 | else |
| 692 | { |
| 693 | /* this is a message without payload, so bend the callback a little |
| 694 | */ |
| 695 | rv = |
| 696 | ((vapi_error_e (*)(vapi_ctx_t, void *, vapi_error_e, bool)) |
| 697 | ctx->requests[tmp].callback) (ctx, |
| 698 | ctx->requests[tmp].callback_ctx, |
| 699 | VAPI_OK, is_last); |
| 700 | } |
| 701 | if (is_last) |
| 702 | { |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 703 | clib_memset (&ctx->requests[ctx->requests_start], 0, |
| 704 | sizeof (ctx->requests[ctx->requests_start])); |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 705 | ++ctx->requests_start; |
| 706 | --ctx->requests_count; |
| 707 | if (ctx->requests_start == ctx->requests_size) |
| 708 | { |
| 709 | ctx->requests_start = 0; |
| 710 | } |
| 711 | } |
| 712 | VAPI_DBG ("after dispatch, req start = %d, end = %d, count = %d", |
| 713 | ctx->requests_start, requests_end, ctx->requests_count); |
| 714 | } |
| 715 | if (0 != (mrv = pthread_mutex_unlock (&ctx->requests_mutex))) |
| 716 | { |
| 717 | VAPI_DBG ("pthread_mutex_unlock() failed, rv=%d:%s", mrv, |
| 718 | strerror (mrv)); |
| 719 | abort (); /* this really shouldn't happen */ |
| 720 | } |
| 721 | return rv; |
| 722 | } |
| 723 | |
| 724 | static vapi_error_e |
| 725 | vapi_dispatch_event (vapi_ctx_t ctx, vapi_msg_id_t id, void *msg) |
| 726 | { |
| 727 | if (ctx->event_cbs[id].cb) |
| 728 | { |
| 729 | return ctx->event_cbs[id].cb (ctx, ctx->event_cbs[id].ctx, msg); |
| 730 | } |
| 731 | else if (ctx->generic_cb.cb) |
| 732 | { |
| 733 | return ctx->generic_cb.cb (ctx, ctx->generic_cb.ctx, id, msg); |
| 734 | } |
| 735 | else |
| 736 | { |
| 737 | VAPI_DBG |
| 738 | ("No handler/generic handler for msg id %u[%s], message ignored", |
| 739 | (unsigned) id, __vapi_metadata.msgs[id]->name); |
| 740 | } |
| 741 | return VAPI_OK; |
| 742 | } |
| 743 | |
Klement Sekera | dc15be2 | 2017-06-12 06:49:33 +0200 | [diff] [blame] | 744 | bool |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 745 | vapi_msg_is_with_context (vapi_msg_id_t id) |
| 746 | { |
| 747 | assert (id <= __vapi_metadata.count); |
| 748 | return __vapi_metadata.msgs[id]->has_context; |
| 749 | } |
| 750 | |
| 751 | vapi_error_e |
| 752 | vapi_dispatch_one (vapi_ctx_t ctx) |
| 753 | { |
| 754 | VAPI_DBG ("vapi_dispatch_one()"); |
| 755 | void *msg; |
| 756 | size_t size; |
Mohsin Kazmi | 3fca567 | 2018-01-04 18:57:26 +0100 | [diff] [blame] | 757 | vapi_error_e rv = vapi_recv (ctx, &msg, &size, SVM_Q_WAIT, 0); |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 758 | if (VAPI_OK != rv) |
| 759 | { |
| 760 | VAPI_DBG ("vapi_recv failed with rv=%d", rv); |
| 761 | return rv; |
| 762 | } |
| 763 | u16 vpp_id = be16toh (*(u16 *) msg); |
| 764 | if (vpp_id > ctx->vl_msg_id_max) |
| 765 | { |
| 766 | VAPI_ERR ("Unknown msg ID received, id `%u', out of range <0,%u>", |
| 767 | (unsigned) vpp_id, (unsigned) ctx->vl_msg_id_max); |
| 768 | vapi_msg_free (ctx, msg); |
| 769 | return VAPI_EINVAL; |
| 770 | } |
Klement Sekera | dab732a | 2018-07-04 13:43:46 +0200 | [diff] [blame] | 771 | if (VAPI_INVALID_MSG_ID == (unsigned) ctx->vl_msg_id_to_vapi_msg_t[vpp_id]) |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 772 | { |
| 773 | VAPI_ERR ("Unknown msg ID received, id `%u' marked as not supported", |
| 774 | (unsigned) vpp_id); |
| 775 | vapi_msg_free (ctx, msg); |
| 776 | return VAPI_EINVAL; |
| 777 | } |
| 778 | const vapi_msg_id_t id = ctx->vl_msg_id_to_vapi_msg_t[vpp_id]; |
| 779 | const size_t expect_size = vapi_get_message_size (id); |
| 780 | if (size < expect_size) |
| 781 | { |
| 782 | VAPI_ERR |
| 783 | ("Invalid msg received, unexpected size `%zu' < expected min `%zu'", |
| 784 | size, expect_size); |
| 785 | vapi_msg_free (ctx, msg); |
| 786 | return VAPI_EINVAL; |
| 787 | } |
| 788 | u32 context; |
| 789 | vapi_get_swap_to_host_func (id) (msg); |
| 790 | if (vapi_msg_is_with_context (id)) |
| 791 | { |
| 792 | context = *(u32 *) (((u8 *) msg) + vapi_get_context_offset (id)); |
| 793 | /* is this a message originating from VAPI? */ |
| 794 | VAPI_DBG ("dispatch, context is %x", context); |
| 795 | if (context & context_counter_mask) |
| 796 | { |
| 797 | rv = vapi_dispatch_response (ctx, id, context, msg); |
| 798 | goto done; |
| 799 | } |
| 800 | } |
| 801 | rv = vapi_dispatch_event (ctx, id, msg); |
| 802 | |
| 803 | done: |
| 804 | vapi_msg_free (ctx, msg); |
| 805 | return rv; |
| 806 | } |
| 807 | |
| 808 | vapi_error_e |
| 809 | vapi_dispatch (vapi_ctx_t ctx) |
| 810 | { |
| 811 | vapi_error_e rv = VAPI_OK; |
| 812 | while (!vapi_requests_empty (ctx)) |
| 813 | { |
| 814 | rv = vapi_dispatch_one (ctx); |
| 815 | if (VAPI_OK != rv) |
| 816 | { |
| 817 | return rv; |
| 818 | } |
| 819 | } |
| 820 | return rv; |
| 821 | } |
| 822 | |
| 823 | void |
| 824 | vapi_set_event_cb (vapi_ctx_t ctx, vapi_msg_id_t id, |
| 825 | vapi_event_cb callback, void *callback_ctx) |
| 826 | { |
| 827 | vapi_event_cb_with_ctx *c = &ctx->event_cbs[id]; |
| 828 | c->cb = callback; |
| 829 | c->ctx = callback_ctx; |
| 830 | } |
| 831 | |
| 832 | void |
| 833 | vapi_clear_event_cb (vapi_ctx_t ctx, vapi_msg_id_t id) |
| 834 | { |
| 835 | vapi_set_event_cb (ctx, id, NULL, NULL); |
| 836 | } |
| 837 | |
| 838 | void |
| 839 | vapi_set_generic_event_cb (vapi_ctx_t ctx, vapi_generic_event_cb callback, |
| 840 | void *callback_ctx) |
| 841 | { |
| 842 | ctx->generic_cb.cb = callback; |
| 843 | ctx->generic_cb.ctx = callback_ctx; |
| 844 | } |
| 845 | |
| 846 | void |
| 847 | vapi_clear_generic_event_cb (vapi_ctx_t ctx) |
| 848 | { |
| 849 | ctx->generic_cb.cb = NULL; |
| 850 | ctx->generic_cb.ctx = NULL; |
| 851 | } |
| 852 | |
| 853 | u16 |
| 854 | vapi_lookup_vl_msg_id (vapi_ctx_t ctx, vapi_msg_id_t id) |
| 855 | { |
| 856 | assert (id < __vapi_metadata.count); |
| 857 | return ctx->vapi_msg_id_t_to_vl_msg_id[id]; |
| 858 | } |
| 859 | |
| 860 | int |
| 861 | vapi_get_client_index (vapi_ctx_t ctx) |
| 862 | { |
| 863 | return api_main.my_client_index; |
| 864 | } |
| 865 | |
| 866 | bool |
| 867 | vapi_is_nonblocking (vapi_ctx_t ctx) |
| 868 | { |
| 869 | return (VAPI_MODE_NONBLOCKING == ctx->mode); |
| 870 | } |
| 871 | |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 872 | size_t |
| 873 | vapi_get_max_request_count (vapi_ctx_t ctx) |
| 874 | { |
| 875 | return ctx->requests_size - 1; |
| 876 | } |
| 877 | |
| 878 | int |
| 879 | vapi_get_payload_offset (vapi_msg_id_t id) |
| 880 | { |
| 881 | assert (id < __vapi_metadata.count); |
| 882 | return __vapi_metadata.msgs[id]->payload_offset; |
| 883 | } |
| 884 | |
| 885 | void (*vapi_get_swap_to_host_func (vapi_msg_id_t id)) (void *msg) |
| 886 | { |
| 887 | assert (id < __vapi_metadata.count); |
| 888 | return __vapi_metadata.msgs[id]->swap_to_host; |
| 889 | } |
| 890 | |
| 891 | void (*vapi_get_swap_to_be_func (vapi_msg_id_t id)) (void *msg) |
| 892 | { |
| 893 | assert (id < __vapi_metadata.count); |
| 894 | return __vapi_metadata.msgs[id]->swap_to_be; |
| 895 | } |
| 896 | |
| 897 | size_t |
| 898 | vapi_get_message_size (vapi_msg_id_t id) |
| 899 | { |
| 900 | assert (id < __vapi_metadata.count); |
| 901 | return __vapi_metadata.msgs[id]->size; |
| 902 | } |
| 903 | |
| 904 | size_t |
| 905 | vapi_get_context_offset (vapi_msg_id_t id) |
| 906 | { |
| 907 | assert (id < __vapi_metadata.count); |
| 908 | return __vapi_metadata.msgs[id]->context_offset; |
| 909 | } |
| 910 | |
| 911 | vapi_msg_id_t |
| 912 | vapi_register_msg (vapi_message_desc_t * msg) |
| 913 | { |
| 914 | int i = 0; |
| 915 | for (i = 0; i < __vapi_metadata.count; ++i) |
| 916 | { |
| 917 | if (!strcmp |
| 918 | (msg->name_with_crc, __vapi_metadata.msgs[i]->name_with_crc)) |
| 919 | { |
| 920 | /* this happens if somebody is linking together several objects while |
| 921 | * using the static inline headers, just fill in the already |
| 922 | * assigned id here so that all the objects are in sync */ |
| 923 | msg->id = __vapi_metadata.msgs[i]->id; |
| 924 | return msg->id; |
| 925 | } |
| 926 | } |
| 927 | vapi_msg_id_t id = __vapi_metadata.count; |
| 928 | ++__vapi_metadata.count; |
| 929 | __vapi_metadata.msgs = |
| 930 | realloc (__vapi_metadata.msgs, |
| 931 | sizeof (*__vapi_metadata.msgs) * __vapi_metadata.count); |
| 932 | __vapi_metadata.msgs[id] = msg; |
| 933 | size_t s = strlen (msg->name_with_crc); |
| 934 | if (s > __vapi_metadata.max_len_name_with_crc) |
| 935 | { |
| 936 | __vapi_metadata.max_len_name_with_crc = s; |
| 937 | } |
| 938 | msg->id = id; |
| 939 | return id; |
| 940 | } |
| 941 | |
| 942 | vapi_error_e |
| 943 | vapi_producer_lock (vapi_ctx_t ctx) |
| 944 | { |
| 945 | int mrv; |
| 946 | if (0 != (mrv = pthread_mutex_lock (&ctx->requests_mutex))) |
| 947 | { |
| 948 | VAPI_DBG ("pthread_mutex_lock() failed, rv=%d:%s", mrv, strerror (mrv)); |
| 949 | (void) mrv; /* avoid warning if the above debug is not enabled */ |
| 950 | return VAPI_MUTEX_FAILURE; |
| 951 | } |
| 952 | return VAPI_OK; |
| 953 | } |
| 954 | |
| 955 | vapi_error_e |
| 956 | vapi_producer_unlock (vapi_ctx_t ctx) |
| 957 | { |
| 958 | int mrv; |
| 959 | if (0 != (mrv = pthread_mutex_unlock (&ctx->requests_mutex))) |
| 960 | { |
| 961 | VAPI_DBG ("pthread_mutex_unlock() failed, rv=%d:%s", mrv, |
| 962 | strerror (mrv)); |
| 963 | (void) mrv; /* avoid warning if the above debug is not enabled */ |
| 964 | return VAPI_MUTEX_FAILURE; |
| 965 | } |
| 966 | return VAPI_OK; |
| 967 | } |
| 968 | |
Klement Sekera | dc15be2 | 2017-06-12 06:49:33 +0200 | [diff] [blame] | 969 | size_t |
| 970 | vapi_get_message_count () |
| 971 | { |
| 972 | return __vapi_metadata.count; |
| 973 | } |
| 974 | |
| 975 | const char * |
| 976 | vapi_get_msg_name (vapi_msg_id_t id) |
| 977 | { |
| 978 | return __vapi_metadata.msgs[id]->name; |
| 979 | } |
| 980 | |
Klement Sekera | 8f2a4ea | 2017-05-04 06:15:18 +0200 | [diff] [blame] | 981 | /* |
| 982 | * fd.io coding-style-patch-verification: ON |
| 983 | * |
| 984 | * Local Variables: |
| 985 | * eval: (c-set-style "gnu") |
| 986 | * End: |
| 987 | */ |