Tim Chen | 1e65b81 | 2014-07-31 10:29:51 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Software multibuffer async crypto daemon. |
| 3 | * |
| 4 | * Copyright (c) 2014 Tim Chen <tim.c.chen@linux.intel.com> |
| 5 | * |
| 6 | * Adapted from crypto daemon. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the Free |
| 10 | * Software Foundation; either version 2 of the License, or (at your option) |
| 11 | * any later version. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #include <crypto/algapi.h> |
| 16 | #include <crypto/internal/hash.h> |
| 17 | #include <crypto/internal/aead.h> |
| 18 | #include <crypto/mcryptd.h> |
| 19 | #include <crypto/crypto_wq.h> |
| 20 | #include <linux/err.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/list.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/scatterlist.h> |
| 26 | #include <linux/sched.h> |
| 27 | #include <linux/slab.h> |
| 28 | #include <linux/hardirq.h> |
| 29 | |
| 30 | #define MCRYPTD_MAX_CPU_QLEN 100 |
| 31 | #define MCRYPTD_BATCH 9 |
| 32 | |
| 33 | static void *mcryptd_alloc_instance(struct crypto_alg *alg, unsigned int head, |
| 34 | unsigned int tail); |
| 35 | |
| 36 | struct mcryptd_flush_list { |
| 37 | struct list_head list; |
| 38 | struct mutex lock; |
| 39 | }; |
| 40 | |
Fengguang Wu | 1f6e97f | 2014-08-26 14:40:39 +0800 | [diff] [blame] | 41 | static struct mcryptd_flush_list __percpu *mcryptd_flist; |
Tim Chen | 1e65b81 | 2014-07-31 10:29:51 -0700 | [diff] [blame] | 42 | |
| 43 | struct hashd_instance_ctx { |
| 44 | struct crypto_shash_spawn spawn; |
| 45 | struct mcryptd_queue *queue; |
| 46 | }; |
| 47 | |
| 48 | static void mcryptd_queue_worker(struct work_struct *work); |
| 49 | |
| 50 | void mcryptd_arm_flusher(struct mcryptd_alg_cstate *cstate, unsigned long delay) |
| 51 | { |
| 52 | struct mcryptd_flush_list *flist; |
| 53 | |
| 54 | if (!cstate->flusher_engaged) { |
| 55 | /* put the flusher on the flush list */ |
| 56 | flist = per_cpu_ptr(mcryptd_flist, smp_processor_id()); |
| 57 | mutex_lock(&flist->lock); |
| 58 | list_add_tail(&cstate->flush_list, &flist->list); |
| 59 | cstate->flusher_engaged = true; |
| 60 | cstate->next_flush = jiffies + delay; |
| 61 | queue_delayed_work_on(smp_processor_id(), kcrypto_wq, |
| 62 | &cstate->flush, delay); |
| 63 | mutex_unlock(&flist->lock); |
| 64 | } |
| 65 | } |
| 66 | EXPORT_SYMBOL(mcryptd_arm_flusher); |
| 67 | |
| 68 | static int mcryptd_init_queue(struct mcryptd_queue *queue, |
| 69 | unsigned int max_cpu_qlen) |
| 70 | { |
| 71 | int cpu; |
| 72 | struct mcryptd_cpu_queue *cpu_queue; |
| 73 | |
| 74 | queue->cpu_queue = alloc_percpu(struct mcryptd_cpu_queue); |
| 75 | pr_debug("mqueue:%p mcryptd_cpu_queue %p\n", queue, queue->cpu_queue); |
| 76 | if (!queue->cpu_queue) |
| 77 | return -ENOMEM; |
| 78 | for_each_possible_cpu(cpu) { |
| 79 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); |
| 80 | pr_debug("cpu_queue #%d %p\n", cpu, queue->cpu_queue); |
| 81 | crypto_init_queue(&cpu_queue->queue, max_cpu_qlen); |
| 82 | INIT_WORK(&cpu_queue->work, mcryptd_queue_worker); |
| 83 | } |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | static void mcryptd_fini_queue(struct mcryptd_queue *queue) |
| 88 | { |
| 89 | int cpu; |
| 90 | struct mcryptd_cpu_queue *cpu_queue; |
| 91 | |
| 92 | for_each_possible_cpu(cpu) { |
| 93 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); |
| 94 | BUG_ON(cpu_queue->queue.qlen); |
| 95 | } |
| 96 | free_percpu(queue->cpu_queue); |
| 97 | } |
| 98 | |
| 99 | static int mcryptd_enqueue_request(struct mcryptd_queue *queue, |
| 100 | struct crypto_async_request *request, |
| 101 | struct mcryptd_hash_request_ctx *rctx) |
| 102 | { |
| 103 | int cpu, err; |
| 104 | struct mcryptd_cpu_queue *cpu_queue; |
| 105 | |
| 106 | cpu = get_cpu(); |
| 107 | cpu_queue = this_cpu_ptr(queue->cpu_queue); |
| 108 | rctx->tag.cpu = cpu; |
| 109 | |
| 110 | err = crypto_enqueue_request(&cpu_queue->queue, request); |
| 111 | pr_debug("enqueue request: cpu %d cpu_queue %p request %p\n", |
| 112 | cpu, cpu_queue, request); |
| 113 | queue_work_on(cpu, kcrypto_wq, &cpu_queue->work); |
| 114 | put_cpu(); |
| 115 | |
| 116 | return err; |
| 117 | } |
| 118 | |
| 119 | /* |
| 120 | * Try to opportunisticlly flush the partially completed jobs if |
| 121 | * crypto daemon is the only task running. |
| 122 | */ |
| 123 | static void mcryptd_opportunistic_flush(void) |
| 124 | { |
| 125 | struct mcryptd_flush_list *flist; |
| 126 | struct mcryptd_alg_cstate *cstate; |
| 127 | |
| 128 | flist = per_cpu_ptr(mcryptd_flist, smp_processor_id()); |
| 129 | while (single_task_running()) { |
| 130 | mutex_lock(&flist->lock); |
| 131 | if (list_empty(&flist->list)) { |
| 132 | mutex_unlock(&flist->lock); |
| 133 | return; |
| 134 | } |
| 135 | cstate = list_entry(flist->list.next, |
| 136 | struct mcryptd_alg_cstate, flush_list); |
| 137 | if (!cstate->flusher_engaged) { |
| 138 | mutex_unlock(&flist->lock); |
| 139 | return; |
| 140 | } |
| 141 | list_del(&cstate->flush_list); |
| 142 | cstate->flusher_engaged = false; |
| 143 | mutex_unlock(&flist->lock); |
| 144 | cstate->alg_state->flusher(cstate); |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /* |
| 149 | * Called in workqueue context, do one real cryption work (via |
| 150 | * req->complete) and reschedule itself if there are more work to |
| 151 | * do. |
| 152 | */ |
| 153 | static void mcryptd_queue_worker(struct work_struct *work) |
| 154 | { |
| 155 | struct mcryptd_cpu_queue *cpu_queue; |
| 156 | struct crypto_async_request *req, *backlog; |
| 157 | int i; |
| 158 | |
| 159 | /* |
| 160 | * Need to loop through more than once for multi-buffer to |
| 161 | * be effective. |
| 162 | */ |
| 163 | |
| 164 | cpu_queue = container_of(work, struct mcryptd_cpu_queue, work); |
| 165 | i = 0; |
| 166 | while (i < MCRYPTD_BATCH || single_task_running()) { |
| 167 | /* |
| 168 | * preempt_disable/enable is used to prevent |
| 169 | * being preempted by mcryptd_enqueue_request() |
| 170 | */ |
| 171 | local_bh_disable(); |
| 172 | preempt_disable(); |
| 173 | backlog = crypto_get_backlog(&cpu_queue->queue); |
| 174 | req = crypto_dequeue_request(&cpu_queue->queue); |
| 175 | preempt_enable(); |
| 176 | local_bh_enable(); |
| 177 | |
| 178 | if (!req) { |
| 179 | mcryptd_opportunistic_flush(); |
| 180 | return; |
| 181 | } |
| 182 | |
| 183 | if (backlog) |
| 184 | backlog->complete(backlog, -EINPROGRESS); |
| 185 | req->complete(req, 0); |
| 186 | if (!cpu_queue->queue.qlen) |
| 187 | return; |
| 188 | ++i; |
| 189 | } |
| 190 | if (cpu_queue->queue.qlen) |
| 191 | queue_work(kcrypto_wq, &cpu_queue->work); |
| 192 | } |
| 193 | |
| 194 | void mcryptd_flusher(struct work_struct *__work) |
| 195 | { |
| 196 | struct mcryptd_alg_cstate *alg_cpu_state; |
| 197 | struct mcryptd_alg_state *alg_state; |
| 198 | struct mcryptd_flush_list *flist; |
| 199 | int cpu; |
| 200 | |
| 201 | cpu = smp_processor_id(); |
| 202 | alg_cpu_state = container_of(to_delayed_work(__work), |
| 203 | struct mcryptd_alg_cstate, flush); |
| 204 | alg_state = alg_cpu_state->alg_state; |
| 205 | if (alg_cpu_state->cpu != cpu) |
| 206 | pr_debug("mcryptd error: work on cpu %d, should be cpu %d\n", |
| 207 | cpu, alg_cpu_state->cpu); |
| 208 | |
| 209 | if (alg_cpu_state->flusher_engaged) { |
| 210 | flist = per_cpu_ptr(mcryptd_flist, cpu); |
| 211 | mutex_lock(&flist->lock); |
| 212 | list_del(&alg_cpu_state->flush_list); |
| 213 | alg_cpu_state->flusher_engaged = false; |
| 214 | mutex_unlock(&flist->lock); |
| 215 | alg_state->flusher(alg_cpu_state); |
| 216 | } |
| 217 | } |
| 218 | EXPORT_SYMBOL_GPL(mcryptd_flusher); |
| 219 | |
| 220 | static inline struct mcryptd_queue *mcryptd_get_queue(struct crypto_tfm *tfm) |
| 221 | { |
| 222 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); |
| 223 | struct mcryptd_instance_ctx *ictx = crypto_instance_ctx(inst); |
| 224 | |
| 225 | return ictx->queue; |
| 226 | } |
| 227 | |
| 228 | static void *mcryptd_alloc_instance(struct crypto_alg *alg, unsigned int head, |
| 229 | unsigned int tail) |
| 230 | { |
| 231 | char *p; |
| 232 | struct crypto_instance *inst; |
| 233 | int err; |
| 234 | |
| 235 | p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL); |
| 236 | if (!p) |
| 237 | return ERR_PTR(-ENOMEM); |
| 238 | |
| 239 | inst = (void *)(p + head); |
| 240 | |
| 241 | err = -ENAMETOOLONG; |
| 242 | if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
| 243 | "mcryptd(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) |
| 244 | goto out_free_inst; |
| 245 | |
| 246 | memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); |
| 247 | |
| 248 | inst->alg.cra_priority = alg->cra_priority + 50; |
| 249 | inst->alg.cra_blocksize = alg->cra_blocksize; |
| 250 | inst->alg.cra_alignmask = alg->cra_alignmask; |
| 251 | |
| 252 | out: |
| 253 | return p; |
| 254 | |
| 255 | out_free_inst: |
| 256 | kfree(p); |
| 257 | p = ERR_PTR(err); |
| 258 | goto out; |
| 259 | } |
| 260 | |
Stephan Mueller | f52bbf5 | 2015-03-30 22:10:58 +0200 | [diff] [blame] | 261 | static inline void mcryptd_check_internal(struct rtattr **tb, u32 *type, |
| 262 | u32 *mask) |
| 263 | { |
| 264 | struct crypto_attr_type *algt; |
| 265 | |
| 266 | algt = crypto_get_attr_type(tb); |
| 267 | if (IS_ERR(algt)) |
| 268 | return; |
| 269 | if ((algt->type & CRYPTO_ALG_INTERNAL)) |
| 270 | *type |= CRYPTO_ALG_INTERNAL; |
| 271 | if ((algt->mask & CRYPTO_ALG_INTERNAL)) |
| 272 | *mask |= CRYPTO_ALG_INTERNAL; |
| 273 | } |
| 274 | |
Tim Chen | 1e65b81 | 2014-07-31 10:29:51 -0700 | [diff] [blame] | 275 | static int mcryptd_hash_init_tfm(struct crypto_tfm *tfm) |
| 276 | { |
| 277 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); |
| 278 | struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst); |
| 279 | struct crypto_shash_spawn *spawn = &ictx->spawn; |
| 280 | struct mcryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); |
| 281 | struct crypto_shash *hash; |
| 282 | |
| 283 | hash = crypto_spawn_shash(spawn); |
| 284 | if (IS_ERR(hash)) |
| 285 | return PTR_ERR(hash); |
| 286 | |
| 287 | ctx->child = hash; |
| 288 | crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), |
| 289 | sizeof(struct mcryptd_hash_request_ctx) + |
| 290 | crypto_shash_descsize(hash)); |
| 291 | return 0; |
| 292 | } |
| 293 | |
| 294 | static void mcryptd_hash_exit_tfm(struct crypto_tfm *tfm) |
| 295 | { |
| 296 | struct mcryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); |
| 297 | |
| 298 | crypto_free_shash(ctx->child); |
| 299 | } |
| 300 | |
| 301 | static int mcryptd_hash_setkey(struct crypto_ahash *parent, |
| 302 | const u8 *key, unsigned int keylen) |
| 303 | { |
| 304 | struct mcryptd_hash_ctx *ctx = crypto_ahash_ctx(parent); |
| 305 | struct crypto_shash *child = ctx->child; |
| 306 | int err; |
| 307 | |
| 308 | crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
| 309 | crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) & |
| 310 | CRYPTO_TFM_REQ_MASK); |
| 311 | err = crypto_shash_setkey(child, key, keylen); |
| 312 | crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) & |
| 313 | CRYPTO_TFM_RES_MASK); |
| 314 | return err; |
| 315 | } |
| 316 | |
| 317 | static int mcryptd_hash_enqueue(struct ahash_request *req, |
| 318 | crypto_completion_t complete) |
| 319 | { |
| 320 | int ret; |
| 321 | |
| 322 | struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 323 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
| 324 | struct mcryptd_queue *queue = |
| 325 | mcryptd_get_queue(crypto_ahash_tfm(tfm)); |
| 326 | |
| 327 | rctx->complete = req->base.complete; |
| 328 | req->base.complete = complete; |
| 329 | |
| 330 | ret = mcryptd_enqueue_request(queue, &req->base, rctx); |
| 331 | |
| 332 | return ret; |
| 333 | } |
| 334 | |
| 335 | static void mcryptd_hash_init(struct crypto_async_request *req_async, int err) |
| 336 | { |
| 337 | struct mcryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); |
| 338 | struct crypto_shash *child = ctx->child; |
| 339 | struct ahash_request *req = ahash_request_cast(req_async); |
| 340 | struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 341 | struct shash_desc *desc = &rctx->desc; |
| 342 | |
| 343 | if (unlikely(err == -EINPROGRESS)) |
| 344 | goto out; |
| 345 | |
| 346 | desc->tfm = child; |
| 347 | desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
| 348 | |
| 349 | err = crypto_shash_init(desc); |
| 350 | |
| 351 | req->base.complete = rctx->complete; |
| 352 | |
| 353 | out: |
| 354 | local_bh_disable(); |
| 355 | rctx->complete(&req->base, err); |
| 356 | local_bh_enable(); |
| 357 | } |
| 358 | |
| 359 | static int mcryptd_hash_init_enqueue(struct ahash_request *req) |
| 360 | { |
| 361 | return mcryptd_hash_enqueue(req, mcryptd_hash_init); |
| 362 | } |
| 363 | |
| 364 | static void mcryptd_hash_update(struct crypto_async_request *req_async, int err) |
| 365 | { |
| 366 | struct ahash_request *req = ahash_request_cast(req_async); |
| 367 | struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 368 | |
| 369 | if (unlikely(err == -EINPROGRESS)) |
| 370 | goto out; |
| 371 | |
| 372 | err = shash_ahash_mcryptd_update(req, &rctx->desc); |
| 373 | if (err) { |
| 374 | req->base.complete = rctx->complete; |
| 375 | goto out; |
| 376 | } |
| 377 | |
| 378 | return; |
| 379 | out: |
| 380 | local_bh_disable(); |
| 381 | rctx->complete(&req->base, err); |
| 382 | local_bh_enable(); |
| 383 | } |
| 384 | |
| 385 | static int mcryptd_hash_update_enqueue(struct ahash_request *req) |
| 386 | { |
| 387 | return mcryptd_hash_enqueue(req, mcryptd_hash_update); |
| 388 | } |
| 389 | |
| 390 | static void mcryptd_hash_final(struct crypto_async_request *req_async, int err) |
| 391 | { |
| 392 | struct ahash_request *req = ahash_request_cast(req_async); |
| 393 | struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 394 | |
| 395 | if (unlikely(err == -EINPROGRESS)) |
| 396 | goto out; |
| 397 | |
| 398 | err = shash_ahash_mcryptd_final(req, &rctx->desc); |
| 399 | if (err) { |
| 400 | req->base.complete = rctx->complete; |
| 401 | goto out; |
| 402 | } |
| 403 | |
| 404 | return; |
| 405 | out: |
| 406 | local_bh_disable(); |
| 407 | rctx->complete(&req->base, err); |
| 408 | local_bh_enable(); |
| 409 | } |
| 410 | |
| 411 | static int mcryptd_hash_final_enqueue(struct ahash_request *req) |
| 412 | { |
| 413 | return mcryptd_hash_enqueue(req, mcryptd_hash_final); |
| 414 | } |
| 415 | |
| 416 | static void mcryptd_hash_finup(struct crypto_async_request *req_async, int err) |
| 417 | { |
| 418 | struct ahash_request *req = ahash_request_cast(req_async); |
| 419 | struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 420 | |
| 421 | if (unlikely(err == -EINPROGRESS)) |
| 422 | goto out; |
| 423 | |
| 424 | err = shash_ahash_mcryptd_finup(req, &rctx->desc); |
| 425 | |
| 426 | if (err) { |
| 427 | req->base.complete = rctx->complete; |
| 428 | goto out; |
| 429 | } |
| 430 | |
| 431 | return; |
| 432 | out: |
| 433 | local_bh_disable(); |
| 434 | rctx->complete(&req->base, err); |
| 435 | local_bh_enable(); |
| 436 | } |
| 437 | |
| 438 | static int mcryptd_hash_finup_enqueue(struct ahash_request *req) |
| 439 | { |
| 440 | return mcryptd_hash_enqueue(req, mcryptd_hash_finup); |
| 441 | } |
| 442 | |
| 443 | static void mcryptd_hash_digest(struct crypto_async_request *req_async, int err) |
| 444 | { |
| 445 | struct mcryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); |
| 446 | struct crypto_shash *child = ctx->child; |
| 447 | struct ahash_request *req = ahash_request_cast(req_async); |
| 448 | struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 449 | struct shash_desc *desc = &rctx->desc; |
| 450 | |
| 451 | if (unlikely(err == -EINPROGRESS)) |
| 452 | goto out; |
| 453 | |
| 454 | desc->tfm = child; |
| 455 | desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; /* check this again */ |
| 456 | |
| 457 | err = shash_ahash_mcryptd_digest(req, desc); |
| 458 | |
| 459 | if (err) { |
| 460 | req->base.complete = rctx->complete; |
| 461 | goto out; |
| 462 | } |
| 463 | |
| 464 | return; |
| 465 | out: |
| 466 | local_bh_disable(); |
| 467 | rctx->complete(&req->base, err); |
| 468 | local_bh_enable(); |
| 469 | } |
| 470 | |
| 471 | static int mcryptd_hash_digest_enqueue(struct ahash_request *req) |
| 472 | { |
| 473 | return mcryptd_hash_enqueue(req, mcryptd_hash_digest); |
| 474 | } |
| 475 | |
| 476 | static int mcryptd_hash_export(struct ahash_request *req, void *out) |
| 477 | { |
| 478 | struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 479 | |
| 480 | return crypto_shash_export(&rctx->desc, out); |
| 481 | } |
| 482 | |
| 483 | static int mcryptd_hash_import(struct ahash_request *req, const void *in) |
| 484 | { |
| 485 | struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 486 | |
| 487 | return crypto_shash_import(&rctx->desc, in); |
| 488 | } |
| 489 | |
| 490 | static int mcryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb, |
| 491 | struct mcryptd_queue *queue) |
| 492 | { |
| 493 | struct hashd_instance_ctx *ctx; |
| 494 | struct ahash_instance *inst; |
| 495 | struct shash_alg *salg; |
| 496 | struct crypto_alg *alg; |
Stephan Mueller | f52bbf5 | 2015-03-30 22:10:58 +0200 | [diff] [blame] | 497 | u32 type = 0; |
| 498 | u32 mask = 0; |
Tim Chen | 1e65b81 | 2014-07-31 10:29:51 -0700 | [diff] [blame] | 499 | int err; |
| 500 | |
Stephan Mueller | f52bbf5 | 2015-03-30 22:10:58 +0200 | [diff] [blame] | 501 | mcryptd_check_internal(tb, &type, &mask); |
| 502 | |
| 503 | salg = shash_attr_alg(tb[1], type, mask); |
Tim Chen | 1e65b81 | 2014-07-31 10:29:51 -0700 | [diff] [blame] | 504 | if (IS_ERR(salg)) |
| 505 | return PTR_ERR(salg); |
| 506 | |
| 507 | alg = &salg->base; |
| 508 | pr_debug("crypto: mcryptd hash alg: %s\n", alg->cra_name); |
| 509 | inst = mcryptd_alloc_instance(alg, ahash_instance_headroom(), |
| 510 | sizeof(*ctx)); |
| 511 | err = PTR_ERR(inst); |
| 512 | if (IS_ERR(inst)) |
| 513 | goto out_put_alg; |
| 514 | |
| 515 | ctx = ahash_instance_ctx(inst); |
| 516 | ctx->queue = queue; |
| 517 | |
| 518 | err = crypto_init_shash_spawn(&ctx->spawn, salg, |
| 519 | ahash_crypto_instance(inst)); |
| 520 | if (err) |
| 521 | goto out_free_inst; |
| 522 | |
Stephan Mueller | f52bbf5 | 2015-03-30 22:10:58 +0200 | [diff] [blame] | 523 | type = CRYPTO_ALG_ASYNC; |
| 524 | if (alg->cra_flags & CRYPTO_ALG_INTERNAL) |
| 525 | type |= CRYPTO_ALG_INTERNAL; |
| 526 | inst->alg.halg.base.cra_flags = type; |
Tim Chen | 1e65b81 | 2014-07-31 10:29:51 -0700 | [diff] [blame] | 527 | |
| 528 | inst->alg.halg.digestsize = salg->digestsize; |
| 529 | inst->alg.halg.base.cra_ctxsize = sizeof(struct mcryptd_hash_ctx); |
| 530 | |
| 531 | inst->alg.halg.base.cra_init = mcryptd_hash_init_tfm; |
| 532 | inst->alg.halg.base.cra_exit = mcryptd_hash_exit_tfm; |
| 533 | |
| 534 | inst->alg.init = mcryptd_hash_init_enqueue; |
| 535 | inst->alg.update = mcryptd_hash_update_enqueue; |
| 536 | inst->alg.final = mcryptd_hash_final_enqueue; |
| 537 | inst->alg.finup = mcryptd_hash_finup_enqueue; |
| 538 | inst->alg.export = mcryptd_hash_export; |
| 539 | inst->alg.import = mcryptd_hash_import; |
| 540 | inst->alg.setkey = mcryptd_hash_setkey; |
| 541 | inst->alg.digest = mcryptd_hash_digest_enqueue; |
| 542 | |
| 543 | err = ahash_register_instance(tmpl, inst); |
| 544 | if (err) { |
| 545 | crypto_drop_shash(&ctx->spawn); |
| 546 | out_free_inst: |
| 547 | kfree(inst); |
| 548 | } |
| 549 | |
| 550 | out_put_alg: |
| 551 | crypto_mod_put(alg); |
| 552 | return err; |
| 553 | } |
| 554 | |
| 555 | static struct mcryptd_queue mqueue; |
| 556 | |
| 557 | static int mcryptd_create(struct crypto_template *tmpl, struct rtattr **tb) |
| 558 | { |
| 559 | struct crypto_attr_type *algt; |
| 560 | |
| 561 | algt = crypto_get_attr_type(tb); |
| 562 | if (IS_ERR(algt)) |
| 563 | return PTR_ERR(algt); |
| 564 | |
| 565 | switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { |
| 566 | case CRYPTO_ALG_TYPE_DIGEST: |
| 567 | return mcryptd_create_hash(tmpl, tb, &mqueue); |
| 568 | break; |
| 569 | } |
| 570 | |
| 571 | return -EINVAL; |
| 572 | } |
| 573 | |
| 574 | static void mcryptd_free(struct crypto_instance *inst) |
| 575 | { |
| 576 | struct mcryptd_instance_ctx *ctx = crypto_instance_ctx(inst); |
| 577 | struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst); |
| 578 | |
| 579 | switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) { |
| 580 | case CRYPTO_ALG_TYPE_AHASH: |
| 581 | crypto_drop_shash(&hctx->spawn); |
| 582 | kfree(ahash_instance(inst)); |
| 583 | return; |
| 584 | default: |
| 585 | crypto_drop_spawn(&ctx->spawn); |
| 586 | kfree(inst); |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | static struct crypto_template mcryptd_tmpl = { |
| 591 | .name = "mcryptd", |
| 592 | .create = mcryptd_create, |
| 593 | .free = mcryptd_free, |
| 594 | .module = THIS_MODULE, |
| 595 | }; |
| 596 | |
| 597 | struct mcryptd_ahash *mcryptd_alloc_ahash(const char *alg_name, |
| 598 | u32 type, u32 mask) |
| 599 | { |
| 600 | char mcryptd_alg_name[CRYPTO_MAX_ALG_NAME]; |
| 601 | struct crypto_ahash *tfm; |
| 602 | |
| 603 | if (snprintf(mcryptd_alg_name, CRYPTO_MAX_ALG_NAME, |
| 604 | "mcryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) |
| 605 | return ERR_PTR(-EINVAL); |
| 606 | tfm = crypto_alloc_ahash(mcryptd_alg_name, type, mask); |
| 607 | if (IS_ERR(tfm)) |
| 608 | return ERR_CAST(tfm); |
| 609 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { |
| 610 | crypto_free_ahash(tfm); |
| 611 | return ERR_PTR(-EINVAL); |
| 612 | } |
| 613 | |
| 614 | return __mcryptd_ahash_cast(tfm); |
| 615 | } |
| 616 | EXPORT_SYMBOL_GPL(mcryptd_alloc_ahash); |
| 617 | |
| 618 | int shash_ahash_mcryptd_digest(struct ahash_request *req, |
| 619 | struct shash_desc *desc) |
| 620 | { |
| 621 | int err; |
| 622 | |
| 623 | err = crypto_shash_init(desc) ?: |
| 624 | shash_ahash_mcryptd_finup(req, desc); |
| 625 | |
| 626 | return err; |
| 627 | } |
| 628 | EXPORT_SYMBOL_GPL(shash_ahash_mcryptd_digest); |
| 629 | |
| 630 | int shash_ahash_mcryptd_update(struct ahash_request *req, |
| 631 | struct shash_desc *desc) |
| 632 | { |
| 633 | struct crypto_shash *tfm = desc->tfm; |
| 634 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 635 | |
| 636 | /* alignment is to be done by multi-buffer crypto algorithm if needed */ |
| 637 | |
| 638 | return shash->update(desc, NULL, 0); |
| 639 | } |
| 640 | EXPORT_SYMBOL_GPL(shash_ahash_mcryptd_update); |
| 641 | |
| 642 | int shash_ahash_mcryptd_finup(struct ahash_request *req, |
| 643 | struct shash_desc *desc) |
| 644 | { |
| 645 | struct crypto_shash *tfm = desc->tfm; |
| 646 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 647 | |
| 648 | /* alignment is to be done by multi-buffer crypto algorithm if needed */ |
| 649 | |
| 650 | return shash->finup(desc, NULL, 0, req->result); |
| 651 | } |
| 652 | EXPORT_SYMBOL_GPL(shash_ahash_mcryptd_finup); |
| 653 | |
| 654 | int shash_ahash_mcryptd_final(struct ahash_request *req, |
| 655 | struct shash_desc *desc) |
| 656 | { |
| 657 | struct crypto_shash *tfm = desc->tfm; |
| 658 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 659 | |
| 660 | /* alignment is to be done by multi-buffer crypto algorithm if needed */ |
| 661 | |
| 662 | return shash->final(desc, req->result); |
| 663 | } |
| 664 | EXPORT_SYMBOL_GPL(shash_ahash_mcryptd_final); |
| 665 | |
| 666 | struct crypto_shash *mcryptd_ahash_child(struct mcryptd_ahash *tfm) |
| 667 | { |
| 668 | struct mcryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); |
| 669 | |
| 670 | return ctx->child; |
| 671 | } |
| 672 | EXPORT_SYMBOL_GPL(mcryptd_ahash_child); |
| 673 | |
| 674 | struct shash_desc *mcryptd_shash_desc(struct ahash_request *req) |
| 675 | { |
| 676 | struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 677 | return &rctx->desc; |
| 678 | } |
| 679 | EXPORT_SYMBOL_GPL(mcryptd_shash_desc); |
| 680 | |
| 681 | void mcryptd_free_ahash(struct mcryptd_ahash *tfm) |
| 682 | { |
| 683 | crypto_free_ahash(&tfm->base); |
| 684 | } |
| 685 | EXPORT_SYMBOL_GPL(mcryptd_free_ahash); |
| 686 | |
| 687 | |
| 688 | static int __init mcryptd_init(void) |
| 689 | { |
| 690 | int err, cpu; |
| 691 | struct mcryptd_flush_list *flist; |
| 692 | |
| 693 | mcryptd_flist = alloc_percpu(struct mcryptd_flush_list); |
| 694 | for_each_possible_cpu(cpu) { |
| 695 | flist = per_cpu_ptr(mcryptd_flist, cpu); |
| 696 | INIT_LIST_HEAD(&flist->list); |
| 697 | mutex_init(&flist->lock); |
| 698 | } |
| 699 | |
| 700 | err = mcryptd_init_queue(&mqueue, MCRYPTD_MAX_CPU_QLEN); |
| 701 | if (err) { |
| 702 | free_percpu(mcryptd_flist); |
| 703 | return err; |
| 704 | } |
| 705 | |
| 706 | err = crypto_register_template(&mcryptd_tmpl); |
| 707 | if (err) { |
| 708 | mcryptd_fini_queue(&mqueue); |
| 709 | free_percpu(mcryptd_flist); |
| 710 | } |
| 711 | |
| 712 | return err; |
| 713 | } |
| 714 | |
| 715 | static void __exit mcryptd_exit(void) |
| 716 | { |
| 717 | mcryptd_fini_queue(&mqueue); |
| 718 | crypto_unregister_template(&mcryptd_tmpl); |
| 719 | free_percpu(mcryptd_flist); |
| 720 | } |
| 721 | |
| 722 | subsys_initcall(mcryptd_init); |
| 723 | module_exit(mcryptd_exit); |
| 724 | |
| 725 | MODULE_LICENSE("GPL"); |
| 726 | MODULE_DESCRIPTION("Software async multibuffer crypto daemon"); |
Kees Cook | 4943ba1 | 2014-11-24 16:32:38 -0800 | [diff] [blame] | 727 | MODULE_ALIAS_CRYPTO("mcryptd"); |