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