crypto/cryptd.c

   1 /*
   2  * Software async crypto daemon.
   3  *
   4  * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
   5  *
   6  * Added AEAD support to cryptd.
   7  *    Authors: Tadeusz Struk (tadeusz.struk@intel.com)
   8  *             Adrian Hoban <adrian.hoban@intel.com>
   9  *             Gabriele Paoloni <gabriele.paoloni@intel.com>
  10  *             Aidan O'Mahony (aidan.o.mahony@intel.com)
  11  *    Copyright (c) 2010, Intel Corporation.
  12  *
  13  * This program is free software; you can redistribute it and/or modify it
  14  * under the terms of the GNU General Public License as published by the Free
  15  * Software Foundation; either version 2 of the License, or (at your option)
  16  * any later version.
  17  *
  18  */
  19
  20 #include <crypto/internal/hash.h>
  21 #include <crypto/internal/aead.h>
  22 #include <crypto/internal/skcipher.h>
  23 #include <crypto/cryptd.h>
  24 #include <crypto/crypto_wq.h>
  25 #include <linux/atomic.h>
  26 #include <linux/err.h>
  27 #include <linux/init.h>
  28 #include <linux/kernel.h>
  29 #include <linux/list.h>
  30 #include <linux/module.h>
  31 #include <linux/scatterlist.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34
  35 static unsigned int cryptd_max_cpu_qlen = 1000;
  36 module_param(cryptd_max_cpu_qlen, uint, 0);
  37 MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth");
  38
  39 struct cryptd_cpu_queue {
  40         struct crypto_queue queue;
  41         struct work_struct work;
  42 };
  43
  44 struct cryptd_queue {
  45         struct cryptd_cpu_queue __percpu *cpu_queue;
  46 };
  47
  48 struct cryptd_instance_ctx {
  49         struct crypto_spawn spawn;
  50         struct cryptd_queue *queue;
  51 };
  52
  53 struct skcipherd_instance_ctx {
  54         struct crypto_skcipher_spawn spawn;
  55         struct cryptd_queue *queue;
  56 };
  57
  58 struct hashd_instance_ctx {
  59         struct crypto_shash_spawn spawn;
  60         struct cryptd_queue *queue;
  61 };
  62
  63 struct aead_instance_ctx {
  64         struct crypto_aead_spawn aead_spawn;
  65         struct cryptd_queue *queue;
  66 };
  67
  68 struct cryptd_blkcipher_ctx {
  69         atomic_t refcnt;
  70         struct crypto_blkcipher *child;
  71 };
  72
  73 struct cryptd_blkcipher_request_ctx {
  74         crypto_completion_t complete;
  75 };
  76
  77 struct cryptd_skcipher_ctx {
  78         atomic_t refcnt;
  79         struct crypto_sync_skcipher *child;
  80 };
  81
  82 struct cryptd_skcipher_request_ctx {
  83         crypto_completion_t complete;
  84 };
  85
  86 struct cryptd_hash_ctx {
  87         atomic_t refcnt;
  88         struct crypto_shash *child;
  89 };
  90
  91 struct cryptd_hash_request_ctx {
  92         crypto_completion_t complete;
  93         struct shash_desc desc;
  94 };
  95
  96 struct cryptd_aead_ctx {
  97         atomic_t refcnt;
  98         struct crypto_aead *child;
  99 };
 100
 101 struct cryptd_aead_request_ctx {
 102         crypto_completion_t complete;
 103 };
 104
 105 static void cryptd_queue_worker(struct work_struct *work);
 106
 107 static int cryptd_init_queue(struct cryptd_queue *queue,
 108                              unsigned int max_cpu_qlen)
 109 {
 110         int cpu;
 111         struct cryptd_cpu_queue *cpu_queue;
 112
 113         queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
 114         if (!queue->cpu_queue)
 115                 return -ENOMEM;
 116         for_each_possible_cpu(cpu) {
 117                 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
 118                 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
 119                 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
 120         }
 121         pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen);
 122         return 0;
 123 }
 124
 125 static void cryptd_fini_queue(struct cryptd_queue *queue)
 126 {
 127         int cpu;
 128         struct cryptd_cpu_queue *cpu_queue;
 129
 130         for_each_possible_cpu(cpu) {
 131                 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
 132                 BUG_ON(cpu_queue->queue.qlen);
 133         }
 134         free_percpu(queue->cpu_queue);
 135 }
 136
 137 static int cryptd_enqueue_request(struct cryptd_queue *queue,
 138                                   struct crypto_async_request *request)
 139 {
 140         int cpu, err;
 141         struct cryptd_cpu_queue *cpu_queue;
 142         atomic_t *refcnt;
 143
 144         cpu = get_cpu();
 145         cpu_queue = this_cpu_ptr(queue->cpu_queue);
 146         err = crypto_enqueue_request(&cpu_queue->queue, request);
 147
 148         refcnt = crypto_tfm_ctx(request->tfm);
 149
 150         if (err == -ENOSPC)
 151                 goto out_put_cpu;
 152
 153         queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
 154
 155         if (!atomic_read(refcnt))
 156                 goto out_put_cpu;
 157
 158         atomic_inc(refcnt);
 159
 160 out_put_cpu:
 161         put_cpu();
 162
 163         return err;
 164 }
 165
 166 /* Called in workqueue context, do one real cryption work (via
 167  * req->complete) and reschedule itself if there are more work to
 168  * do. */
 169 static void cryptd_queue_worker(struct work_struct *work)
 170 {
 171         struct cryptd_cpu_queue *cpu_queue;
 172         struct crypto_async_request *req, *backlog;
 173
 174         cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
 175         /*
 176          * Only handle one request at a time to avoid hogging crypto workqueue.
 177          * preempt_disable/enable is used to prevent being preempted by
 178          * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent
 179          * cryptd_enqueue_request() being accessed from software interrupts.
 180          */
 181         local_bh_disable();
 182         preempt_disable();
 183         backlog = crypto_get_backlog(&cpu_queue->queue);
 184         req = crypto_dequeue_request(&cpu_queue->queue);
 185         preempt_enable();
 186         local_bh_enable();
 187
 188         if (!req)
 189                 return;
 190
 191         if (backlog)
 192                 backlog->complete(backlog, -EINPROGRESS);
 193         req->complete(req, 0);
 194
 195         if (cpu_queue->queue.qlen)
 196                 queue_work(kcrypto_wq, &cpu_queue->work);
 197 }
 198
 199 static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
 200 {
 201         struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
 202         struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
 203         return ictx->queue;
 204 }
 205
 206 static inline void cryptd_check_internal(struct rtattr **tb, u32 *type,
 207                                          u32 *mask)
 208 {
 209         struct crypto_attr_type *algt;
 210
 211         algt = crypto_get_attr_type(tb);
 212         if (IS_ERR(algt))
 213                 return;
 214
 215         *type |= algt->type & CRYPTO_ALG_INTERNAL;
 216         *mask |= algt->mask & CRYPTO_ALG_INTERNAL;
 217 }
 218
 219 static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent,
 220                                    const u8 *key, unsigned int keylen)
 221 {
 222         struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent);
 223         struct crypto_blkcipher *child = ctx->child;
 224         int err;
 225
 226         crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
 227         crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) &
 228                                           CRYPTO_TFM_REQ_MASK);
 229         err = crypto_blkcipher_setkey(child, key, keylen);
 230         crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) &
 231                                             CRYPTO_TFM_RES_MASK);
 232         return err;
 233 }
 234
 235 static void cryptd_blkcipher_crypt(struct ablkcipher_request *req,
 236                                    struct crypto_blkcipher *child,
 237                                    int err,
 238                                    int (*crypt)(struct blkcipher_desc *desc,
 239                                                 struct scatterlist *dst,
 240                                                 struct scatterlist *src,
 241                                                 unsigned int len))
 242 {
 243         struct cryptd_blkcipher_request_ctx *rctx;
 244         struct cryptd_blkcipher_ctx *ctx;
 245         struct crypto_ablkcipher *tfm;
 246         struct blkcipher_desc desc;
 247         int refcnt;
 248
 249         rctx = ablkcipher_request_ctx(req);
 250
 251         if (unlikely(err == -EINPROGRESS))
 252                 goto out;
 253
 254         desc.tfm = child;
 255         desc.info = req->info;
 256         desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 257
 258         err = crypt(&desc, req->dst, req->src, req->nbytes);
 259
 260         req->base.complete = rctx->complete;
 261
 262 out:
 263         tfm = crypto_ablkcipher_reqtfm(req);
 264         ctx = crypto_ablkcipher_ctx(tfm);
 265         refcnt = atomic_read(&ctx->refcnt);
 266
 267         local_bh_disable();
 268         rctx->complete(&req->base, err);
 269         local_bh_enable();
 270
 271         if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
 272                 crypto_free_ablkcipher(tfm);
 273 }
 274
 275 static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err)
 276 {
 277         struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
 278         struct crypto_blkcipher *child = ctx->child;
 279
 280         cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
 281                                crypto_blkcipher_crt(child)->encrypt);
 282 }
 283
 284 static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err)
 285 {
 286         struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
 287         struct crypto_blkcipher *child = ctx->child;
 288
 289         cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
 290                                crypto_blkcipher_crt(child)->decrypt);
 291 }
 292
 293 static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req,
 294                                     crypto_completion_t compl)
 295 {
 296         struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req);
 297         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 298         struct cryptd_queue *queue;
 299
 300         queue = cryptd_get_queue(crypto_ablkcipher_tfm(tfm));
 301         rctx->complete = req->base.complete;
 302         req->base.complete = compl;
 303
 304         return cryptd_enqueue_request(queue, &req->base);
 305 }
 306
 307 static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req)
 308 {
 309         return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt);
 310 }
 311
 312 static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req)
 313 {
 314         return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt);
 315 }
 316
 317 static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm)
 318 {
 319         struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
 320         struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
 321         struct crypto_spawn *spawn = &ictx->spawn;
 322         struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
 323         struct crypto_blkcipher *cipher;
 324
 325         cipher = crypto_spawn_blkcipher(spawn);
 326         if (IS_ERR(cipher))
 327                 return PTR_ERR(cipher);
 328
 329         ctx->child = cipher;
 330         tfm->crt_ablkcipher.reqsize =
 331                 sizeof(struct cryptd_blkcipher_request_ctx);
 332         return 0;
 333 }
 334
 335 static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm)
 336 {
 337         struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
 338
 339         crypto_free_blkcipher(ctx->child);
 340 }
 341
 342 static int cryptd_init_instance(struct crypto_instance *inst,
 343                                 struct crypto_alg *alg)
 344 {
 345         if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
 346                      "cryptd(%s)",
 347                      alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
 348                 return -ENAMETOOLONG;
 349
 350         memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
 351
 352         inst->alg.cra_priority = alg->cra_priority + 50;
 353         inst->alg.cra_blocksize = alg->cra_blocksize;
 354         inst->alg.cra_alignmask = alg->cra_alignmask;
 355
 356         return 0;
 357 }
 358
 359 static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
 360                                    unsigned int tail)
 361 {
 362         char *p;
 363         struct crypto_instance *inst;
 364         int err;
 365
 366         p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
 367         if (!p)
 368                 return ERR_PTR(-ENOMEM);
 369
 370         inst = (void *)(p + head);
 371
 372         err = cryptd_init_instance(inst, alg);
 373         if (err)
 374                 goto out_free_inst;
 375
 376 out:
 377         return p;
 378
 379 out_free_inst:
 380         kfree(p);
 381         p = ERR_PTR(err);
 382         goto out;
 383 }
 384
 385 static int cryptd_create_blkcipher(struct crypto_template *tmpl,
 386                                    struct rtattr **tb,
 387                                    struct cryptd_queue *queue)
 388 {
 389         struct cryptd_instance_ctx *ctx;
 390         struct crypto_instance *inst;
 391         struct crypto_alg *alg;
 392         u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
 393         u32 mask = CRYPTO_ALG_TYPE_MASK;
 394         int err;
 395
 396         cryptd_check_internal(tb, &type, &mask);
 397
 398         alg = crypto_get_attr_alg(tb, type, mask);
 399         if (IS_ERR(alg))
 400                 return PTR_ERR(alg);
 401
 402         inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx));
 403         err = PTR_ERR(inst);
 404         if (IS_ERR(inst))
 405                 goto out_put_alg;
 406
 407         ctx = crypto_instance_ctx(inst);
 408         ctx->queue = queue;
 409
 410         err = crypto_init_spawn(&ctx->spawn, alg, inst,
 411                                 CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
 412         if (err)
 413                 goto out_free_inst;
 414
 415         type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
 416         if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
 417                 type |= CRYPTO_ALG_INTERNAL;
 418         inst->alg.cra_flags = type;
 419         inst->alg.cra_type = &crypto_ablkcipher_type;
 420
 421         inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize;
 422         inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize;
 423         inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize;
 424
 425         inst->alg.cra_ctxsize = sizeof(struct cryptd_blkcipher_ctx);
 426
 427         inst->alg.cra_init = cryptd_blkcipher_init_tfm;
 428         inst->alg.cra_exit = cryptd_blkcipher_exit_tfm;
 429
 430         inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey;
 431         inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue;
 432         inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue;
 433
 434         err = crypto_register_instance(tmpl, inst);
 435         if (err) {
 436                 crypto_drop_spawn(&ctx->spawn);
 437 out_free_inst:
 438                 kfree(inst);
 439         }
 440
 441 out_put_alg:
 442         crypto_mod_put(alg);
 443         return err;
 444 }
 445
 446 static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
 447                                   const u8 *key, unsigned int keylen)
 448 {
 449         struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
 450         struct crypto_sync_skcipher *child = ctx->child;
 451         int err;
 452
 453         crypto_sync_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
 454         crypto_sync_skcipher_set_flags(child,
 455                                        crypto_skcipher_get_flags(parent) &
 456                                          CRYPTO_TFM_REQ_MASK);
 457         err = crypto_sync_skcipher_setkey(child, key, keylen);
 458         crypto_skcipher_set_flags(parent,
 459                                   crypto_sync_skcipher_get_flags(child) &
 460                                           CRYPTO_TFM_RES_MASK);
 461         return err;
 462 }
 463
 464 static void cryptd_skcipher_complete(struct skcipher_request *req, int err)
 465 {
 466         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 467         struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
 468         struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
 469         int refcnt = atomic_read(&ctx->refcnt);
 470
 471         local_bh_disable();
 472         rctx->complete(&req->base, err);
 473         local_bh_enable();
 474
 475         if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
 476                 crypto_free_skcipher(tfm);
 477 }
 478
 479 static void cryptd_skcipher_encrypt(struct crypto_async_request *base,
 480                                     int err)
 481 {
 482         struct skcipher_request *req = skcipher_request_cast(base);
 483         struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
 484         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 485         struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
 486         struct crypto_sync_skcipher *child = ctx->child;
 487         SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child);
 488
 489         if (unlikely(err == -EINPROGRESS))
 490                 goto out;
 491
 492         skcipher_request_set_sync_tfm(subreq, child);
 493         skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
 494                                       NULL, NULL);
 495         skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
 496                                    req->iv);
 497
 498         err = crypto_skcipher_encrypt(subreq);
 499         skcipher_request_zero(subreq);
 500
 501         req->base.complete = rctx->complete;
 502
 503 out:
 504         cryptd_skcipher_complete(req, err);
 505 }
 506
 507 static void cryptd_skcipher_decrypt(struct crypto_async_request *base,
 508                                     int err)
 509 {
 510         struct skcipher_request *req = skcipher_request_cast(base);
 511         struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
 512         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 513         struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
 514         struct crypto_sync_skcipher *child = ctx->child;
 515         SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child);
 516
 517         if (unlikely(err == -EINPROGRESS))
 518                 goto out;
 519
 520         skcipher_request_set_sync_tfm(subreq, child);
 521         skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
 522                                       NULL, NULL);
 523         skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
 524                                    req->iv);
 525
 526         err = crypto_skcipher_decrypt(subreq);
 527         skcipher_request_zero(subreq);
 528
 529         req->base.complete = rctx->complete;
 530
 531 out:
 532         cryptd_skcipher_complete(req, err);
 533 }
 534
 535 static int cryptd_skcipher_enqueue(struct skcipher_request *req,
 536                                    crypto_completion_t compl)
 537 {
 538         struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
 539         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 540         struct cryptd_queue *queue;
 541
 542         queue = cryptd_get_queue(crypto_skcipher_tfm(tfm));
 543         rctx->complete = req->base.complete;
 544         req->base.complete = compl;
 545
 546         return cryptd_enqueue_request(queue, &req->base);
 547 }
 548
 549 static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
 550 {
 551         return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
 552 }
 553
 554 static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
 555 {
 556         return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
 557 }
 558
 559 static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
 560 {
 561         struct skcipher_instance *inst = skcipher_alg_instance(tfm);
 562         struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst);
 563         struct crypto_skcipher_spawn *spawn = &ictx->spawn;
 564         struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
 565         struct crypto_skcipher *cipher;
 566
 567         cipher = crypto_spawn_skcipher(spawn);
 568         if (IS_ERR(cipher))
 569                 return PTR_ERR(cipher);
 570
 571         ctx->child = (struct crypto_sync_skcipher *)cipher;
 572         crypto_skcipher_set_reqsize(
 573                 tfm, sizeof(struct cryptd_skcipher_request_ctx));
 574         return 0;
 575 }
 576
 577 static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
 578 {
 579         struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
 580
 581         crypto_free_sync_skcipher(ctx->child);
 582 }
 583
 584 static void cryptd_skcipher_free(struct skcipher_instance *inst)
 585 {
 586         struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
 587
 588         crypto_drop_skcipher(&ctx->spawn);
 589 }
 590
 591 static int cryptd_create_skcipher(struct crypto_template *tmpl,
 592                                   struct rtattr **tb,
 593                                   struct cryptd_queue *queue)
 594 {
 595         struct skcipherd_instance_ctx *ctx;
 596         struct skcipher_instance *inst;
 597         struct skcipher_alg *alg;
 598         const char *name;
 599         u32 type;
 600         u32 mask;
 601         int err;
 602
 603         type = 0;
 604         mask = CRYPTO_ALG_ASYNC;
 605
 606         cryptd_check_internal(tb, &type, &mask);
 607
 608         name = crypto_attr_alg_name(tb[1]);
 609         if (IS_ERR(name))
 610                 return PTR_ERR(name);
 611
 612         inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
 613         if (!inst)
 614                 return -ENOMEM;
 615
 616         ctx = skcipher_instance_ctx(inst);
 617         ctx->queue = queue;
 618
 619         crypto_set_skcipher_spawn(&ctx->spawn, skcipher_crypto_instance(inst));
 620         err = crypto_grab_skcipher(&ctx->spawn, name, type, mask);
 621         if (err)
 622                 goto out_free_inst;
 623
 624         alg = crypto_spawn_skcipher_alg(&ctx->spawn);
 625         err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
 626         if (err)
 627                 goto out_drop_skcipher;
 628
 629         inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
 630                                    (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
 631
 632         inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg);
 633         inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
 634         inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
 635         inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg);
 636
 637         inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);
 638
 639         inst->alg.init = cryptd_skcipher_init_tfm;
 640         inst->alg.exit = cryptd_skcipher_exit_tfm;
 641
 642         inst->alg.setkey = cryptd_skcipher_setkey;
 643         inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue;
 644         inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue;
 645
 646         inst->free = cryptd_skcipher_free;
 647
 648         err = skcipher_register_instance(tmpl, inst);
 649         if (err) {
 650 out_drop_skcipher:
 651                 crypto_drop_skcipher(&ctx->spawn);
 652 out_free_inst:
 653                 kfree(inst);
 654         }
 655         return err;
 656 }
 657
 658 static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
 659 {
 660         struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
 661         struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
 662         struct crypto_shash_spawn *spawn = &ictx->spawn;
 663         struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
 664         struct crypto_shash *hash;
 665
 666         hash = crypto_spawn_shash(spawn);
 667         if (IS_ERR(hash))
 668                 return PTR_ERR(hash);
 669
 670         ctx->child = hash;
 671         crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
 672                                  sizeof(struct cryptd_hash_request_ctx) +
 673                                  crypto_shash_descsize(hash));
 674         return 0;
 675 }
 676
 677 static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
 678 {
 679         struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
 680
 681         crypto_free_shash(ctx->child);
 682 }
 683
 684 static int cryptd_hash_setkey(struct crypto_ahash *parent,
 685                                    const u8 *key, unsigned int keylen)
 686 {
 687         struct cryptd_hash_ctx *ctx   = crypto_ahash_ctx(parent);
 688         struct crypto_shash *child = ctx->child;
 689         int err;
 690
 691         crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
 692         crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
 693                                       CRYPTO_TFM_REQ_MASK);
 694         err = crypto_shash_setkey(child, key, keylen);
 695         crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
 696                                        CRYPTO_TFM_RES_MASK);
 697         return err;
 698 }
 699
 700 static int cryptd_hash_enqueue(struct ahash_request *req,
 701                                 crypto_completion_t compl)
 702 {
 703         struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
 704         struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
 705         struct cryptd_queue *queue =
 706                 cryptd_get_queue(crypto_ahash_tfm(tfm));
 707
 708         rctx->complete = req->base.complete;
 709         req->base.complete = compl;
 710
 711         return cryptd_enqueue_request(queue, &req->base);
 712 }
 713
 714 static void cryptd_hash_complete(struct ahash_request *req, int err)
 715 {
 716         struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
 717         struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
 718         struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
 719         int refcnt = atomic_read(&ctx->refcnt);
 720
 721         local_bh_disable();
 722         rctx->complete(&req->base, err);
 723         local_bh_enable();
 724
 725         if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
 726                 crypto_free_ahash(tfm);
 727 }
 728
 729 static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
 730 {
 731         struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
 732         struct crypto_shash *child = ctx->child;
 733         struct ahash_request *req = ahash_request_cast(req_async);
 734         struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
 735         struct shash_desc *desc = &rctx->desc;
 736
 737         if (unlikely(err == -EINPROGRESS))
 738                 goto out;
 739
 740         desc->tfm = child;
 741         desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 742
 743         err = crypto_shash_init(desc);
 744
 745         req->base.complete = rctx->complete;
 746
 747 out:
 748         cryptd_hash_complete(req, err);
 749 }
 750
 751 static int cryptd_hash_init_enqueue(struct ahash_request *req)
 752 {
 753         return cryptd_hash_enqueue(req, cryptd_hash_init);
 754 }
 755
 756 static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
 757 {
 758         struct ahash_request *req = ahash_request_cast(req_async);
 759         struct cryptd_hash_request_ctx *rctx;
 760
 761         rctx = ahash_request_ctx(req);
 762
 763         if (unlikely(err == -EINPROGRESS))
 764                 goto out;
 765
 766         err = shash_ahash_update(req, &rctx->desc);
 767
 768         req->base.complete = rctx->complete;
 769
 770 out:
 771         cryptd_hash_complete(req, err);
 772 }
 773
 774 static int cryptd_hash_update_enqueue(struct ahash_request *req)
 775 {
 776         return cryptd_hash_enqueue(req, cryptd_hash_update);
 777 }
 778
 779 static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
 780 {
 781         struct ahash_request *req = ahash_request_cast(req_async);
 782         struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
 783
 784         if (unlikely(err == -EINPROGRESS))
 785                 goto out;
 786
 787         err = crypto_shash_final(&rctx->desc, req->result);
 788
 789         req->base.complete = rctx->complete;
 790
 791 out:
 792         cryptd_hash_complete(req, err);
 793 }
 794
 795 static int cryptd_hash_final_enqueue(struct ahash_request *req)
 796 {
 797         return cryptd_hash_enqueue(req, cryptd_hash_final);
 798 }
 799
 800 static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
 801 {
 802         struct ahash_request *req = ahash_request_cast(req_async);
 803         struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
 804
 805         if (unlikely(err == -EINPROGRESS))
 806                 goto out;
 807
 808         err = shash_ahash_finup(req, &rctx->desc);
 809
 810         req->base.complete = rctx->complete;
 811
 812 out:
 813         cryptd_hash_complete(req, err);
 814 }
 815
 816 static int cryptd_hash_finup_enqueue(struct ahash_request *req)
 817 {
 818         return cryptd_hash_enqueue(req, cryptd_hash_finup);
 819 }
 820
 821 static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
 822 {
 823         struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
 824         struct crypto_shash *child = ctx->child;
 825         struct ahash_request *req = ahash_request_cast(req_async);
 826         struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
 827         struct shash_desc *desc = &rctx->desc;
 828
 829         if (unlikely(err == -EINPROGRESS))
 830                 goto out;
 831
 832         desc->tfm = child;
 833         desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 834
 835         err = shash_ahash_digest(req, desc);
 836
 837         req->base.complete = rctx->complete;
 838
 839 out:
 840         cryptd_hash_complete(req, err);
 841 }
 842
 843 static int cryptd_hash_digest_enqueue(struct ahash_request *req)
 844 {
 845         return cryptd_hash_enqueue(req, cryptd_hash_digest);
 846 }
 847
 848 static int cryptd_hash_export(struct ahash_request *req, void *out)
 849 {
 850         struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
 851
 852         return crypto_shash_export(&rctx->desc, out);
 853 }
 854
 855 static int cryptd_hash_import(struct ahash_request *req, const void *in)
 856 {
 857         struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
 858         struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
 859         struct shash_desc *desc = cryptd_shash_desc(req);
 860
 861         desc->tfm = ctx->child;
 862         desc->flags = req->base.flags;
 863
 864         return crypto_shash_import(desc, in);
 865 }
 866
 867 static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
 868                               struct cryptd_queue *queue)
 869 {
 870         struct hashd_instance_ctx *ctx;
 871         struct ahash_instance *inst;
 872         struct shash_alg *salg;
 873         struct crypto_alg *alg;
 874         u32 type = 0;
 875         u32 mask = 0;
 876         int err;
 877
 878         cryptd_check_internal(tb, &type, &mask);
 879
 880         salg = shash_attr_alg(tb[1], type, mask);
 881         if (IS_ERR(salg))
 882                 return PTR_ERR(salg);
 883
 884         alg = &salg->base;
 885         inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
 886                                      sizeof(*ctx));
 887         err = PTR_ERR(inst);
 888         if (IS_ERR(inst))
 889                 goto out_put_alg;
 890
 891         ctx = ahash_instance_ctx(inst);
 892         ctx->queue = queue;
 893
 894         err = crypto_init_shash_spawn(&ctx->spawn, salg,
 895                                       ahash_crypto_instance(inst));
 896         if (err)
 897                 goto out_free_inst;
 898
 899         inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC |
 900                 (alg->cra_flags & (CRYPTO_ALG_INTERNAL |
 901                                    CRYPTO_ALG_OPTIONAL_KEY));
 902
 903         inst->alg.halg.digestsize = salg->digestsize;
 904         inst->alg.halg.statesize = salg->statesize;
 905         inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
 906
 907         inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
 908         inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
 909
 910         inst->alg.init   = cryptd_hash_init_enqueue;
 911         inst->alg.update = cryptd_hash_update_enqueue;
 912         inst->alg.final  = cryptd_hash_final_enqueue;
 913         inst->alg.finup  = cryptd_hash_finup_enqueue;
 914         inst->alg.export = cryptd_hash_export;
 915         inst->alg.import = cryptd_hash_import;
 916         if (crypto_shash_alg_has_setkey(salg))
 917                 inst->alg.setkey = cryptd_hash_setkey;
 918         inst->alg.digest = cryptd_hash_digest_enqueue;
 919
 920         err = ahash_register_instance(tmpl, inst);
 921         if (err) {
 922                 crypto_drop_shash(&ctx->spawn);
 923 out_free_inst:
 924                 kfree(inst);
 925         }
 926
 927 out_put_alg:
 928         crypto_mod_put(alg);
 929         return err;
 930 }
 931
 932 static int cryptd_aead_setkey(struct crypto_aead *parent,
 933                               const u8 *key, unsigned int keylen)
 934 {
 935         struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
 936         struct crypto_aead *child = ctx->child;
 937
 938         return crypto_aead_setkey(child, key, keylen);
 939 }
 940
 941 static int cryptd_aead_setauthsize(struct crypto_aead *parent,
 942                                    unsigned int authsize)
 943 {
 944         struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
 945         struct crypto_aead *child = ctx->child;
 946
 947         return crypto_aead_setauthsize(child, authsize);
 948 }
 949
 950 static void cryptd_aead_crypt(struct aead_request *req,
 951                         struct crypto_aead *child,
 952                         int err,
 953                         int (*crypt)(struct aead_request *req))
 954 {
 955         struct cryptd_aead_request_ctx *rctx;
 956         struct cryptd_aead_ctx *ctx;
 957         crypto_completion_t compl;
 958         struct crypto_aead *tfm;
 959         int refcnt;
 960
 961         rctx = aead_request_ctx(req);
 962         compl = rctx->complete;
 963
 964         tfm = crypto_aead_reqtfm(req);
 965
 966         if (unlikely(err == -EINPROGRESS))
 967                 goto out;
 968         aead_request_set_tfm(req, child);
 969         err = crypt( req );
 970
 971 out:
 972         ctx = crypto_aead_ctx(tfm);
 973         refcnt = atomic_read(&ctx->refcnt);
 974
 975         local_bh_disable();
 976         compl(&req->base, err);
 977         local_bh_enable();
 978
 979         if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
 980                 crypto_free_aead(tfm);
 981 }
 982
 983 static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err)
 984 {
 985         struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
 986         struct crypto_aead *child = ctx->child;
 987         struct aead_request *req;
 988
 989         req = container_of(areq, struct aead_request, base);
 990         cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt);
 991 }
 992
 993 static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err)
 994 {
 995         struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
 996         struct crypto_aead *child = ctx->child;
 997         struct aead_request *req;
 998
 999         req = container_of(areq, struct aead_request, base);
1000         cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt);
1001 }
1002
1003 static int cryptd_aead_enqueue(struct aead_request *req,
1004                                     crypto_completion_t compl)
1005 {
1006         struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req);
1007         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
1008         struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm));
1009
1010         rctx->complete = req->base.complete;
1011         req->base.complete = compl;
1012         return cryptd_enqueue_request(queue, &req->base);
1013 }
1014
1015 static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
1016 {
1017         return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
1018 }
1019
1020 static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
1021 {
1022         return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
1023 }
1024
1025 static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
1026 {
1027         struct aead_instance *inst = aead_alg_instance(tfm);
1028         struct aead_instance_ctx *ictx = aead_instance_ctx(inst);
1029         struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
1030         struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
1031         struct crypto_aead *cipher;
1032
1033         cipher = crypto_spawn_aead(spawn);
1034         if (IS_ERR(cipher))
1035                 return PTR_ERR(cipher);
1036
1037         ctx->child = cipher;
1038         crypto_aead_set_reqsize(
1039                 tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
1040                          crypto_aead_reqsize(cipher)));
1041         return 0;
1042 }
1043
1044 static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
1045 {
1046         struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
1047         crypto_free_aead(ctx->child);
1048 }
1049
1050 static int cryptd_create_aead(struct crypto_template *tmpl,
1051                               struct rtattr **tb,
1052                               struct cryptd_queue *queue)
1053 {
1054         struct aead_instance_ctx *ctx;
1055         struct aead_instance *inst;
1056         struct aead_alg *alg;
1057         const char *name;
1058         u32 type = 0;
1059         u32 mask = CRYPTO_ALG_ASYNC;
1060         int err;
1061
1062         cryptd_check_internal(tb, &type, &mask);
1063
1064         name = crypto_attr_alg_name(tb[1]);
1065         if (IS_ERR(name))
1066                 return PTR_ERR(name);
1067
1068         inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
1069         if (!inst)
1070                 return -ENOMEM;
1071
1072         ctx = aead_instance_ctx(inst);
1073         ctx->queue = queue;
1074
1075         crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst));
1076         err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask);
1077         if (err)
1078                 goto out_free_inst;
1079
1080         alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
1081         err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
1082         if (err)
1083                 goto out_drop_aead;
1084
1085         inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
1086                                    (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
1087         inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
1088
1089         inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
1090         inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
1091
1092         inst->alg.init = cryptd_aead_init_tfm;
1093         inst->alg.exit = cryptd_aead_exit_tfm;
1094         inst->alg.setkey = cryptd_aead_setkey;
1095         inst->alg.setauthsize = cryptd_aead_setauthsize;
1096         inst->alg.encrypt = cryptd_aead_encrypt_enqueue;
1097         inst->alg.decrypt = cryptd_aead_decrypt_enqueue;
1098
1099         err = aead_register_instance(tmpl, inst);
1100         if (err) {
1101 out_drop_aead:
1102                 crypto_drop_aead(&ctx->aead_spawn);
1103 out_free_inst:
1104                 kfree(inst);
1105         }
1106         return err;
1107 }
1108
1109 static struct cryptd_queue queue;
1110
1111 static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
1112 {
1113         struct crypto_attr_type *algt;
1114
1115         algt = crypto_get_attr_type(tb);
1116         if (IS_ERR(algt))
1117                 return PTR_ERR(algt);
1118
1119         switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
1120         case CRYPTO_ALG_TYPE_BLKCIPHER:
1121                 if ((algt->type & CRYPTO_ALG_TYPE_MASK) ==
1122                     CRYPTO_ALG_TYPE_BLKCIPHER)
1123                         return cryptd_create_blkcipher(tmpl, tb, &queue);
1124
1125                 return cryptd_create_skcipher(tmpl, tb, &queue);
1126         case CRYPTO_ALG_TYPE_DIGEST:
1127                 return cryptd_create_hash(tmpl, tb, &queue);
1128         case CRYPTO_ALG_TYPE_AEAD:
1129                 return cryptd_create_aead(tmpl, tb, &queue);
1130         }
1131
1132         return -EINVAL;
1133 }
1134
1135 static void cryptd_free(struct crypto_instance *inst)
1136 {
1137         struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
1138         struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
1139         struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst);
1140
1141         switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
1142         case CRYPTO_ALG_TYPE_AHASH:
1143                 crypto_drop_shash(&hctx->spawn);
1144                 kfree(ahash_instance(inst));
1145                 return;
1146         case CRYPTO_ALG_TYPE_AEAD:
1147                 crypto_drop_aead(&aead_ctx->aead_spawn);
1148                 kfree(aead_instance(inst));
1149                 return;
1150         default:
1151                 crypto_drop_spawn(&ctx->spawn);
1152                 kfree(inst);
1153         }
1154 }
1155
1156 static struct crypto_template cryptd_tmpl = {
1157         .name = "cryptd",
1158         .create = cryptd_create,
1159         .free = cryptd_free,
1160         .module = THIS_MODULE,
1161 };
1162
1163 struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
1164                                                   u32 type, u32 mask)
1165 {
1166         char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1167         struct cryptd_blkcipher_ctx *ctx;
1168         struct crypto_tfm *tfm;
1169
1170         if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1171                      "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1172                 return ERR_PTR(-EINVAL);
1173         type = crypto_skcipher_type(type);
1174         mask &= ~CRYPTO_ALG_TYPE_MASK;
1175         mask |= CRYPTO_ALG_TYPE_BLKCIPHER_MASK;
1176         tfm = crypto_alloc_base(cryptd_alg_name, type, mask);
1177         if (IS_ERR(tfm))
1178                 return ERR_CAST(tfm);
1179         if (tfm->__crt_alg->cra_module != THIS_MODULE) {
1180                 crypto_free_tfm(tfm);
1181                 return ERR_PTR(-EINVAL);
1182         }
1183
1184         ctx = crypto_tfm_ctx(tfm);
1185         atomic_set(&ctx->refcnt, 1);
1186
1187         return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm));
1188 }
1189 EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher);
1190
1191 struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm)
1192 {
1193         struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
1194         return ctx->child;
1195 }
1196 EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child);
1197
1198 bool cryptd_ablkcipher_queued(struct cryptd_ablkcipher *tfm)
1199 {
1200         struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
1201
1202         return atomic_read(&ctx->refcnt) - 1;
1203 }
1204 EXPORT_SYMBOL_GPL(cryptd_ablkcipher_queued);
1205
1206 void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm)
1207 {
1208         struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
1209
1210         if (atomic_dec_and_test(&ctx->refcnt))
1211                 crypto_free_ablkcipher(&tfm->base);
1212 }
1213 EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher);
1214
1215 struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
1216                                               u32 type, u32 mask)
1217 {
1218         char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1219         struct cryptd_skcipher_ctx *ctx;
1220         struct crypto_skcipher *tfm;
1221
1222         if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1223                      "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1224                 return ERR_PTR(-EINVAL);
1225
1226         tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask);
1227         if (IS_ERR(tfm))
1228                 return ERR_CAST(tfm);
1229
1230         if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1231                 crypto_free_skcipher(tfm);
1232                 return ERR_PTR(-EINVAL);
1233         }
1234
1235         ctx = crypto_skcipher_ctx(tfm);
1236         atomic_set(&ctx->refcnt, 1);
1237
1238         return container_of(tfm, struct cryptd_skcipher, base);
1239 }
1240 EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
1241
1242 struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm)
1243 {
1244         struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1245
1246         return &ctx->child->base;
1247 }
1248 EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
1249
1250 bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm)
1251 {
1252         struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1253
1254         return atomic_read(&ctx->refcnt) - 1;
1255 }
1256 EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
1257
1258 void cryptd_free_skcipher(struct cryptd_skcipher *tfm)
1259 {
1260         struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1261
1262         if (atomic_dec_and_test(&ctx->refcnt))
1263                 crypto_free_skcipher(&tfm->base);
1264 }
1265 EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
1266
1267 struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
1268                                         u32 type, u32 mask)
1269 {
1270         char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1271         struct cryptd_hash_ctx *ctx;
1272         struct crypto_ahash *tfm;
1273
1274         if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1275                      "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1276                 return ERR_PTR(-EINVAL);
1277         tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
1278         if (IS_ERR(tfm))
1279                 return ERR_CAST(tfm);
1280         if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1281                 crypto_free_ahash(tfm);
1282                 return ERR_PTR(-EINVAL);
1283         }
1284
1285         ctx = crypto_ahash_ctx(tfm);
1286         atomic_set(&ctx->refcnt, 1);
1287
1288         return __cryptd_ahash_cast(tfm);
1289 }
1290 EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
1291
1292 struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
1293 {
1294         struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1295
1296         return ctx->child;
1297 }
1298 EXPORT_SYMBOL_GPL(cryptd_ahash_child);
1299
1300 struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
1301 {
1302         struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
1303         return &rctx->desc;
1304 }
1305 EXPORT_SYMBOL_GPL(cryptd_shash_desc);
1306
1307 bool cryptd_ahash_queued(struct cryptd_ahash *tfm)
1308 {
1309         struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1310
1311         return atomic_read(&ctx->refcnt) - 1;
1312 }
1313 EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
1314
1315 void cryptd_free_ahash(struct cryptd_ahash *tfm)
1316 {
1317         struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1318
1319         if (atomic_dec_and_test(&ctx->refcnt))
1320                 crypto_free_ahash(&tfm->base);
1321 }
1322 EXPORT_SYMBOL_GPL(cryptd_free_ahash);
1323
1324 struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
1325                                                   u32 type, u32 mask)
1326 {
1327         char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1328         struct cryptd_aead_ctx *ctx;
1329         struct crypto_aead *tfm;
1330
1331         if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1332                      "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1333                 return ERR_PTR(-EINVAL);
1334         tfm = crypto_alloc_aead(cryptd_alg_name, type, mask);
1335         if (IS_ERR(tfm))
1336                 return ERR_CAST(tfm);
1337         if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1338                 crypto_free_aead(tfm);
1339                 return ERR_PTR(-EINVAL);
1340         }
1341
1342         ctx = crypto_aead_ctx(tfm);
1343         atomic_set(&ctx->refcnt, 1);
1344
1345         return __cryptd_aead_cast(tfm);
1346 }
1347 EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
1348
1349 struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
1350 {
1351         struct cryptd_aead_ctx *ctx;
1352         ctx = crypto_aead_ctx(&tfm->base);
1353         return ctx->child;
1354 }
1355 EXPORT_SYMBOL_GPL(cryptd_aead_child);
1356
1357 bool cryptd_aead_queued(struct cryptd_aead *tfm)
1358 {
1359         struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1360
1361         return atomic_read(&ctx->refcnt) - 1;
1362 }
1363 EXPORT_SYMBOL_GPL(cryptd_aead_queued);
1364
1365 void cryptd_free_aead(struct cryptd_aead *tfm)
1366 {
1367         struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1368
1369         if (atomic_dec_and_test(&ctx->refcnt))
1370                 crypto_free_aead(&tfm->base);
1371 }
1372 EXPORT_SYMBOL_GPL(cryptd_free_aead);
1373
1374 static int __init cryptd_init(void)
1375 {
1376         int err;
1377
1378         err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
1379         if (err)
1380                 return err;
1381
1382         err = crypto_register_template(&cryptd_tmpl);
1383         if (err)
1384                 cryptd_fini_queue(&queue);
1385
1386         return err;
1387 }
1388
1389 static void __exit cryptd_exit(void)
1390 {
1391         cryptd_fini_queue(&queue);
1392         crypto_unregister_template(&cryptd_tmpl);
1393 }
1394
1395 subsys_initcall(cryptd_init);
1396 module_exit(cryptd_exit);
1397
1398 MODULE_LICENSE("GPL");
1399 MODULE_DESCRIPTION("Software async crypto daemon");
1400 MODULE_ALIAS_CRYPTO("cryptd");