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