backends/cryptodev.c

   1 /*
   2  * QEMU Crypto Device Implementation
   3  *
   4  * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
   5  *
   6  * Authors:
   7  *    Gonglei <arei.gonglei@huawei.com>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  21  *
  22  */
  23
  24 #include "qemu/osdep.h"
  25 #include "sysemu/cryptodev.h"
  26 #include "sysemu/stats.h"
  27 #include "qapi/error.h"
  28 #include "qapi/qapi-commands-cryptodev.h"
  29 #include "qapi/qapi-types-stats.h"
  30 #include "qapi/visitor.h"
  31 #include "qemu/config-file.h"
  32 #include "qemu/error-report.h"
  33 #include "qemu/main-loop.h"
  34 #include "qom/object_interfaces.h"
  35 #include "hw/virtio/virtio-crypto.h"
  36
  37 #define SYM_ENCRYPT_OPS_STR "sym-encrypt-ops"
  38 #define SYM_DECRYPT_OPS_STR "sym-decrypt-ops"
  39 #define SYM_ENCRYPT_BYTES_STR "sym-encrypt-bytes"
  40 #define SYM_DECRYPT_BYTES_STR "sym-decrypt-bytes"
  41
  42 #define ASYM_ENCRYPT_OPS_STR "asym-encrypt-ops"
  43 #define ASYM_DECRYPT_OPS_STR "asym-decrypt-ops"
  44 #define ASYM_SIGN_OPS_STR "asym-sign-ops"
  45 #define ASYM_VERIFY_OPS_STR "asym-verify-ops"
  46 #define ASYM_ENCRYPT_BYTES_STR "asym-encrypt-bytes"
  47 #define ASYM_DECRYPT_BYTES_STR "asym-decrypt-bytes"
  48 #define ASYM_SIGN_BYTES_STR "asym-sign-bytes"
  49 #define ASYM_VERIFY_BYTES_STR "asym-verify-bytes"
  50
  51 typedef struct StatsArgs {
  52     union StatsResultsType {
  53         StatsResultList **stats;
  54         StatsSchemaList **schema;
  55     } result;
  56     strList *names;
  57     Error **errp;
  58 } StatsArgs;
  59
  60 static QTAILQ_HEAD(, CryptoDevBackendClient) crypto_clients;
  61
  62 static int qmp_query_cryptodev_foreach(Object *obj, void *data)
  63 {
  64     CryptoDevBackend *backend;
  65     QCryptodevInfoList **infolist = data;
  66     uint32_t services, i;
  67
  68     if (!object_dynamic_cast(obj, TYPE_CRYPTODEV_BACKEND)) {
  69         return 0;
  70     }
  71
  72     QCryptodevInfo *info = g_new0(QCryptodevInfo, 1);
  73     info->id = g_strdup(object_get_canonical_path_component(obj));
  74
  75     backend = CRYPTODEV_BACKEND(obj);
  76     services = backend->conf.crypto_services;
  77     for (i = 0; i < QCRYPTODEV_BACKEND_SERVICE__MAX; i++) {
  78         if (services & (1 << i)) {
  79             QAPI_LIST_PREPEND(info->service, i);
  80         }
  81     }
  82
  83     for (i = 0; i < backend->conf.peers.queues; i++) {
  84         CryptoDevBackendClient *cc = backend->conf.peers.ccs[i];
  85         QCryptodevBackendClient *client = g_new0(QCryptodevBackendClient, 1);
  86
  87         client->queue = cc->queue_index;
  88         client->type = cc->type;
  89         QAPI_LIST_PREPEND(info->client, client);
  90     }
  91
  92     QAPI_LIST_PREPEND(*infolist, info);
  93
  94     return 0;
  95 }
  96
  97 QCryptodevInfoList *qmp_query_cryptodev(Error **errp)
  98 {
  99     QCryptodevInfoList *list = NULL;
 100     Object *objs = container_get(object_get_root(), "/objects");
 101
 102     object_child_foreach(objs, qmp_query_cryptodev_foreach, &list);
 103
 104     return list;
 105 }
 106
 107 CryptoDevBackendClient *cryptodev_backend_new_client(void)
 108 {
 109     CryptoDevBackendClient *cc;
 110
 111     cc = g_new0(CryptoDevBackendClient, 1);
 112     QTAILQ_INSERT_TAIL(&crypto_clients, cc, next);
 113
 114     return cc;
 115 }
 116
 117 void cryptodev_backend_free_client(
 118                   CryptoDevBackendClient *cc)
 119 {
 120     QTAILQ_REMOVE(&crypto_clients, cc, next);
 121     g_free(cc->info_str);
 122     g_free(cc);
 123 }
 124
 125 void cryptodev_backend_cleanup(
 126              CryptoDevBackend *backend,
 127              Error **errp)
 128 {
 129     CryptoDevBackendClass *bc =
 130                   CRYPTODEV_BACKEND_GET_CLASS(backend);
 131
 132     if (bc->cleanup) {
 133         bc->cleanup(backend, errp);
 134     }
 135
 136     g_free(backend->sym_stat);
 137     g_free(backend->asym_stat);
 138 }
 139
 140 int cryptodev_backend_create_session(
 141            CryptoDevBackend *backend,
 142            CryptoDevBackendSessionInfo *sess_info,
 143            uint32_t queue_index,
 144            CryptoDevCompletionFunc cb,
 145            void *opaque)
 146 {
 147     CryptoDevBackendClass *bc =
 148                       CRYPTODEV_BACKEND_GET_CLASS(backend);
 149
 150     if (bc->create_session) {
 151         return bc->create_session(backend, sess_info, queue_index, cb, opaque);
 152     }
 153     return -VIRTIO_CRYPTO_NOTSUPP;
 154 }
 155
 156 int cryptodev_backend_close_session(
 157            CryptoDevBackend *backend,
 158            uint64_t session_id,
 159            uint32_t queue_index,
 160            CryptoDevCompletionFunc cb,
 161            void *opaque)
 162 {
 163     CryptoDevBackendClass *bc =
 164                       CRYPTODEV_BACKEND_GET_CLASS(backend);
 165
 166     if (bc->close_session) {
 167         return bc->close_session(backend, session_id, queue_index, cb, opaque);
 168     }
 169     return -VIRTIO_CRYPTO_NOTSUPP;
 170 }
 171
 172 static int cryptodev_backend_operation(
 173                  CryptoDevBackend *backend,
 174                  CryptoDevBackendOpInfo *op_info)
 175 {
 176     CryptoDevBackendClass *bc =
 177                       CRYPTODEV_BACKEND_GET_CLASS(backend);
 178
 179     if (bc->do_op) {
 180         return bc->do_op(backend, op_info);
 181     }
 182     return -VIRTIO_CRYPTO_NOTSUPP;
 183 }
 184
 185 static int cryptodev_backend_account(CryptoDevBackend *backend,
 186                  CryptoDevBackendOpInfo *op_info)
 187 {
 188     enum QCryptodevBackendAlgType algtype = op_info->algtype;
 189     int len;
 190
 191     if (algtype == QCRYPTODEV_BACKEND_ALG_ASYM) {
 192         CryptoDevBackendAsymOpInfo *asym_op_info = op_info->u.asym_op_info;
 193         len = asym_op_info->src_len;
 194         switch (op_info->op_code) {
 195         case VIRTIO_CRYPTO_AKCIPHER_ENCRYPT:
 196             CryptodevAsymStatIncEncrypt(backend, len);
 197             break;
 198         case VIRTIO_CRYPTO_AKCIPHER_DECRYPT:
 199             CryptodevAsymStatIncDecrypt(backend, len);
 200             break;
 201         case VIRTIO_CRYPTO_AKCIPHER_SIGN:
 202             CryptodevAsymStatIncSign(backend, len);
 203             break;
 204         case VIRTIO_CRYPTO_AKCIPHER_VERIFY:
 205             CryptodevAsymStatIncVerify(backend, len);
 206             break;
 207         default:
 208             return -VIRTIO_CRYPTO_NOTSUPP;
 209         }
 210     } else if (algtype == QCRYPTODEV_BACKEND_ALG_SYM) {
 211         CryptoDevBackendSymOpInfo *sym_op_info = op_info->u.sym_op_info;
 212         len = sym_op_info->src_len;
 213         switch (op_info->op_code) {
 214         case VIRTIO_CRYPTO_CIPHER_ENCRYPT:
 215             CryptodevSymStatIncEncrypt(backend, len);
 216             break;
 217         case VIRTIO_CRYPTO_CIPHER_DECRYPT:
 218             CryptodevSymStatIncDecrypt(backend, len);
 219             break;
 220         default:
 221             return -VIRTIO_CRYPTO_NOTSUPP;
 222         }
 223     } else {
 224         error_report("Unsupported cryptodev alg type: %" PRIu32 "", algtype);
 225         return -VIRTIO_CRYPTO_NOTSUPP;
 226     }
 227
 228     return len;
 229 }
 230
 231 static void cryptodev_backend_throttle_timer_cb(void *opaque)
 232 {
 233     CryptoDevBackend *backend = (CryptoDevBackend *)opaque;
 234     CryptoDevBackendOpInfo *op_info, *tmpop;
 235     int ret;
 236
 237     QTAILQ_FOREACH_SAFE(op_info, &backend->opinfos, next, tmpop) {
 238         QTAILQ_REMOVE(&backend->opinfos, op_info, next);
 239         ret = cryptodev_backend_account(backend, op_info);
 240         if (ret < 0) {
 241             op_info->cb(op_info->opaque, ret);
 242             continue;
 243         }
 244
 245         throttle_account(&backend->ts, true, ret);
 246         cryptodev_backend_operation(backend, op_info);
 247         if (throttle_enabled(&backend->tc) &&
 248             throttle_schedule_timer(&backend->ts, &backend->tt, true)) {
 249             break;
 250         }
 251     }
 252 }
 253
 254 int cryptodev_backend_crypto_operation(
 255                  CryptoDevBackend *backend,
 256                  CryptoDevBackendOpInfo *op_info)
 257 {
 258     int ret;
 259
 260     if (!throttle_enabled(&backend->tc)) {
 261         goto do_account;
 262     }
 263
 264     if (throttle_schedule_timer(&backend->ts, &backend->tt, true) ||
 265         !QTAILQ_EMPTY(&backend->opinfos)) {
 266         QTAILQ_INSERT_TAIL(&backend->opinfos, op_info, next);
 267         return 0;
 268     }
 269
 270 do_account:
 271     ret = cryptodev_backend_account(backend, op_info);
 272     if (ret < 0) {
 273         return ret;
 274     }
 275
 276     throttle_account(&backend->ts, true, ret);
 277
 278     return cryptodev_backend_operation(backend, op_info);
 279 }
 280
 281 static void
 282 cryptodev_backend_get_queues(Object *obj, Visitor *v, const char *name,
 283                              void *opaque, Error **errp)
 284 {
 285     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
 286     uint32_t value = backend->conf.peers.queues;
 287
 288     visit_type_uint32(v, name, &value, errp);
 289 }
 290
 291 static void
 292 cryptodev_backend_set_queues(Object *obj, Visitor *v, const char *name,
 293                              void *opaque, Error **errp)
 294 {
 295     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
 296     uint32_t value;
 297
 298     if (!visit_type_uint32(v, name, &value, errp)) {
 299         return;
 300     }
 301     if (!value) {
 302         error_setg(errp, "Property '%s.%s' doesn't take value '%" PRIu32 "'",
 303                    object_get_typename(obj), name, value);
 304         return;
 305     }
 306     backend->conf.peers.queues = value;
 307 }
 308
 309 static void cryptodev_backend_set_throttle(CryptoDevBackend *backend, int field,
 310                                            uint64_t value, Error **errp)
 311 {
 312     uint64_t orig = backend->tc.buckets[field].avg;
 313     bool enabled = throttle_enabled(&backend->tc);
 314
 315     if (orig == value) {
 316         return;
 317     }
 318
 319     backend->tc.buckets[field].avg = value;
 320     if (!throttle_enabled(&backend->tc)) {
 321         throttle_timers_destroy(&backend->tt);
 322         cryptodev_backend_throttle_timer_cb(backend); /* drain opinfos */
 323         return;
 324     }
 325
 326     if (!throttle_is_valid(&backend->tc, errp)) {
 327         backend->tc.buckets[field].avg = orig; /* revert change */
 328         return;
 329     }
 330
 331     if (!enabled) {
 332         throttle_init(&backend->ts);
 333         throttle_timers_init(&backend->tt, qemu_get_aio_context(),
 334                              QEMU_CLOCK_REALTIME,
 335                              cryptodev_backend_throttle_timer_cb, /* FIXME */
 336                              cryptodev_backend_throttle_timer_cb, backend);
 337     }
 338
 339     throttle_config(&backend->ts, QEMU_CLOCK_REALTIME, &backend->tc);
 340 }
 341
 342 static void cryptodev_backend_get_bps(Object *obj, Visitor *v,
 343                                       const char *name, void *opaque,
 344                                       Error **errp)
 345 {
 346     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
 347     uint64_t value = backend->tc.buckets[THROTTLE_BPS_TOTAL].avg;
 348
 349     visit_type_uint64(v, name, &value, errp);
 350 }
 351
 352 static void cryptodev_backend_set_bps(Object *obj, Visitor *v, const char *name,
 353                                       void *opaque, Error **errp)
 354 {
 355     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
 356     uint64_t value;
 357
 358     if (!visit_type_uint64(v, name, &value, errp)) {
 359         return;
 360     }
 361
 362     cryptodev_backend_set_throttle(backend, THROTTLE_BPS_TOTAL, value, errp);
 363 }
 364
 365 static void cryptodev_backend_get_ops(Object *obj, Visitor *v, const char *name,
 366                                       void *opaque, Error **errp)
 367 {
 368     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
 369     uint64_t value = backend->tc.buckets[THROTTLE_OPS_TOTAL].avg;
 370
 371     visit_type_uint64(v, name, &value, errp);
 372 }
 373
 374 static void cryptodev_backend_set_ops(Object *obj, Visitor *v,
 375                                        const char *name, void *opaque,
 376                                        Error **errp)
 377 {
 378     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
 379     uint64_t value;
 380
 381     if (!visit_type_uint64(v, name, &value, errp)) {
 382         return;
 383     }
 384
 385     cryptodev_backend_set_throttle(backend, THROTTLE_OPS_TOTAL, value, errp);
 386 }
 387
 388 static void
 389 cryptodev_backend_complete(UserCreatable *uc, Error **errp)
 390 {
 391     CryptoDevBackend *backend = CRYPTODEV_BACKEND(uc);
 392     CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_GET_CLASS(uc);
 393     uint32_t services;
 394     uint64_t value;
 395
 396     QTAILQ_INIT(&backend->opinfos);
 397     value = backend->tc.buckets[THROTTLE_OPS_TOTAL].avg;
 398     cryptodev_backend_set_throttle(backend, THROTTLE_OPS_TOTAL, value, errp);
 399     value = backend->tc.buckets[THROTTLE_BPS_TOTAL].avg;
 400     cryptodev_backend_set_throttle(backend, THROTTLE_BPS_TOTAL, value, errp);
 401
 402     if (bc->init) {
 403         bc->init(backend, errp);
 404     }
 405
 406     services = backend->conf.crypto_services;
 407     if (services & (1 << QCRYPTODEV_BACKEND_SERVICE_CIPHER)) {
 408         backend->sym_stat = g_new0(CryptodevBackendSymStat, 1);
 409     }
 410
 411     if (services & (1 << QCRYPTODEV_BACKEND_SERVICE_AKCIPHER)) {
 412         backend->asym_stat = g_new0(CryptodevBackendAsymStat, 1);
 413     }
 414 }
 415
 416 void cryptodev_backend_set_used(CryptoDevBackend *backend, bool used)
 417 {
 418     backend->is_used = used;
 419 }
 420
 421 bool cryptodev_backend_is_used(CryptoDevBackend *backend)
 422 {
 423     return backend->is_used;
 424 }
 425
 426 void cryptodev_backend_set_ready(CryptoDevBackend *backend, bool ready)
 427 {
 428     backend->ready = ready;
 429 }
 430
 431 bool cryptodev_backend_is_ready(CryptoDevBackend *backend)
 432 {
 433     return backend->ready;
 434 }
 435
 436 static bool
 437 cryptodev_backend_can_be_deleted(UserCreatable *uc)
 438 {
 439     return !cryptodev_backend_is_used(CRYPTODEV_BACKEND(uc));
 440 }
 441
 442 static void cryptodev_backend_instance_init(Object *obj)
 443 {
 444     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
 445
 446     /* Initialize devices' queues property to 1 */
 447     object_property_set_int(obj, "queues", 1, NULL);
 448
 449     throttle_config_init(&backend->tc);
 450 }
 451
 452 static void cryptodev_backend_finalize(Object *obj)
 453 {
 454     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
 455
 456     cryptodev_backend_cleanup(backend, NULL);
 457     if (throttle_enabled(&backend->tc)) {
 458         throttle_timers_destroy(&backend->tt);
 459     }
 460 }
 461
 462 static StatsList *cryptodev_backend_stats_add(const char *name, int64_t *val,
 463                                               StatsList *stats_list)
 464 {
 465     Stats *stats = g_new0(Stats, 1);
 466
 467     stats->name = g_strdup(name);
 468     stats->value = g_new0(StatsValue, 1);
 469     stats->value->type = QTYPE_QNUM;
 470     stats->value->u.scalar = *val;
 471
 472     QAPI_LIST_PREPEND(stats_list, stats);
 473     return stats_list;
 474 }
 475
 476 static int cryptodev_backend_stats_query(Object *obj, void *data)
 477 {
 478     StatsArgs *stats_args = data;
 479     StatsResultList **stats_results = stats_args->result.stats;
 480     StatsList *stats_list = NULL;
 481     StatsResult *entry;
 482     CryptoDevBackend *backend;
 483     CryptodevBackendSymStat *sym_stat;
 484     CryptodevBackendAsymStat *asym_stat;
 485
 486     if (!object_dynamic_cast(obj, TYPE_CRYPTODEV_BACKEND)) {
 487         return 0;
 488     }
 489
 490     backend = CRYPTODEV_BACKEND(obj);
 491     sym_stat = backend->sym_stat;
 492     if (sym_stat) {
 493         stats_list = cryptodev_backend_stats_add(SYM_ENCRYPT_OPS_STR,
 494                          &sym_stat->encrypt_ops, stats_list);
 495         stats_list = cryptodev_backend_stats_add(SYM_DECRYPT_OPS_STR,
 496                          &sym_stat->decrypt_ops, stats_list);
 497         stats_list = cryptodev_backend_stats_add(SYM_ENCRYPT_BYTES_STR,
 498                          &sym_stat->encrypt_bytes, stats_list);
 499         stats_list = cryptodev_backend_stats_add(SYM_DECRYPT_BYTES_STR,
 500                          &sym_stat->decrypt_bytes, stats_list);
 501     }
 502
 503     asym_stat = backend->asym_stat;
 504     if (asym_stat) {
 505         stats_list = cryptodev_backend_stats_add(ASYM_ENCRYPT_OPS_STR,
 506                          &asym_stat->encrypt_ops, stats_list);
 507         stats_list = cryptodev_backend_stats_add(ASYM_DECRYPT_OPS_STR,
 508                          &asym_stat->decrypt_ops, stats_list);
 509         stats_list = cryptodev_backend_stats_add(ASYM_SIGN_OPS_STR,
 510                          &asym_stat->sign_ops, stats_list);
 511         stats_list = cryptodev_backend_stats_add(ASYM_VERIFY_OPS_STR,
 512                          &asym_stat->verify_ops, stats_list);
 513         stats_list = cryptodev_backend_stats_add(ASYM_ENCRYPT_BYTES_STR,
 514                          &asym_stat->encrypt_bytes, stats_list);
 515         stats_list = cryptodev_backend_stats_add(ASYM_DECRYPT_BYTES_STR,
 516                          &asym_stat->decrypt_bytes, stats_list);
 517         stats_list = cryptodev_backend_stats_add(ASYM_SIGN_BYTES_STR,
 518                          &asym_stat->sign_bytes, stats_list);
 519         stats_list = cryptodev_backend_stats_add(ASYM_VERIFY_BYTES_STR,
 520                          &asym_stat->verify_bytes, stats_list);
 521     }
 522
 523     entry = g_new0(StatsResult, 1);
 524     entry->provider = STATS_PROVIDER_CRYPTODEV;
 525     entry->qom_path = g_strdup(object_get_canonical_path(obj));
 526     entry->stats = stats_list;
 527     QAPI_LIST_PREPEND(*stats_results, entry);
 528
 529     return 0;
 530 }
 531
 532 static void cryptodev_backend_stats_cb(StatsResultList **result,
 533                                        StatsTarget target,
 534                                        strList *names, strList *targets,
 535                                        Error **errp)
 536 {
 537     switch (target) {
 538     case STATS_TARGET_CRYPTODEV:
 539     {
 540         Object *objs = container_get(object_get_root(), "/objects");
 541         StatsArgs stats_args;
 542         stats_args.result.stats = result;
 543         stats_args.names = names;
 544         stats_args.errp = errp;
 545
 546         object_child_foreach(objs, cryptodev_backend_stats_query, &stats_args);
 547         break;
 548     }
 549     default:
 550         break;
 551     }
 552 }
 553
 554 static StatsSchemaValueList *cryptodev_backend_schemas_add(const char *name,
 555                                  StatsSchemaValueList *list)
 556 {
 557     StatsSchemaValueList *schema_entry = g_new0(StatsSchemaValueList, 1);
 558
 559     schema_entry->value = g_new0(StatsSchemaValue, 1);
 560     schema_entry->value->type = STATS_TYPE_CUMULATIVE;
 561     schema_entry->value->name = g_strdup(name);
 562     schema_entry->next = list;
 563
 564     return schema_entry;
 565 }
 566
 567 static void cryptodev_backend_schemas_cb(StatsSchemaList **result,
 568                                          Error **errp)
 569 {
 570     StatsSchemaValueList *stats_list = NULL;
 571     const char *sym_stats[] = { SYM_ENCRYPT_OPS_STR, SYM_DECRYPT_OPS_STR,
 572                                 SYM_ENCRYPT_BYTES_STR, SYM_DECRYPT_BYTES_STR };
 573     const char *asym_stats[] = { ASYM_ENCRYPT_OPS_STR, ASYM_DECRYPT_OPS_STR,
 574                                  ASYM_SIGN_OPS_STR, ASYM_VERIFY_OPS_STR,
 575                                  ASYM_ENCRYPT_BYTES_STR, ASYM_DECRYPT_BYTES_STR,
 576                                  ASYM_SIGN_BYTES_STR, ASYM_VERIFY_BYTES_STR };
 577
 578     for (int i = 0; i < ARRAY_SIZE(sym_stats); i++) {
 579         stats_list = cryptodev_backend_schemas_add(sym_stats[i], stats_list);
 580     }
 581
 582     for (int i = 0; i < ARRAY_SIZE(asym_stats); i++) {
 583         stats_list = cryptodev_backend_schemas_add(asym_stats[i], stats_list);
 584     }
 585
 586     add_stats_schema(result, STATS_PROVIDER_CRYPTODEV, STATS_TARGET_CRYPTODEV,
 587                      stats_list);
 588 }
 589
 590 static void
 591 cryptodev_backend_class_init(ObjectClass *oc, void *data)
 592 {
 593     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 594
 595     ucc->complete = cryptodev_backend_complete;
 596     ucc->can_be_deleted = cryptodev_backend_can_be_deleted;
 597
 598     QTAILQ_INIT(&crypto_clients);
 599     object_class_property_add(oc, "queues", "uint32",
 600                               cryptodev_backend_get_queues,
 601                               cryptodev_backend_set_queues,
 602                               NULL, NULL);
 603     object_class_property_add(oc, "throttle-bps", "uint64",
 604                               cryptodev_backend_get_bps,
 605                               cryptodev_backend_set_bps,
 606                               NULL, NULL);
 607     object_class_property_add(oc, "throttle-ops", "uint64",
 608                               cryptodev_backend_get_ops,
 609                               cryptodev_backend_set_ops,
 610                               NULL, NULL);
 611
 612     add_stats_callbacks(STATS_PROVIDER_CRYPTODEV, cryptodev_backend_stats_cb,
 613                         cryptodev_backend_schemas_cb);
 614 }
 615
 616 static const TypeInfo cryptodev_backend_info = {
 617     .name = TYPE_CRYPTODEV_BACKEND,
 618     .parent = TYPE_OBJECT,
 619     .instance_size = sizeof(CryptoDevBackend),
 620     .instance_init = cryptodev_backend_instance_init,
 621     .instance_finalize = cryptodev_backend_finalize,
 622     .class_size = sizeof(CryptoDevBackendClass),
 623     .class_init = cryptodev_backend_class_init,
 624     .interfaces = (InterfaceInfo[]) {
 625         { TYPE_USER_CREATABLE },
 626         { }
 627     }
 628 };
 629
 630 static void
 631 cryptodev_backend_register_types(void)
 632 {
 633     type_register_static(&cryptodev_backend_info);
 634 }
 635
 636 type_init(cryptodev_backend_register_types);