Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Software async crypto daemon. |
| 3 | * |
| 4 | * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the Free |
| 8 | * Software Foundation; either version 2 of the License, or (at your option) |
| 9 | * any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <crypto/algapi.h> |
Herbert Xu | 18e33e6 | 2008-07-10 16:01:22 +0800 | [diff] [blame] | 14 | #include <crypto/internal/hash.h> |
Huang Ying | 1cac2cb | 2009-01-18 16:19:46 +1100 | [diff] [blame] | 15 | #include <crypto/cryptd.h> |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 16 | #include <crypto/crypto_wq.h> |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 17 | #include <linux/err.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/kernel.h> |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 20 | #include <linux/list.h> |
| 21 | #include <linux/module.h> |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 22 | #include <linux/scatterlist.h> |
| 23 | #include <linux/sched.h> |
| 24 | #include <linux/slab.h> |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 25 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 26 | #define CRYPTD_MAX_CPU_QLEN 100 |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 27 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 28 | struct cryptd_cpu_queue { |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 29 | struct crypto_queue queue; |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 30 | struct work_struct work; |
| 31 | }; |
| 32 | |
| 33 | struct cryptd_queue { |
| 34 | struct cryptd_cpu_queue *cpu_queue; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 35 | }; |
| 36 | |
| 37 | struct cryptd_instance_ctx { |
| 38 | struct crypto_spawn spawn; |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 39 | struct cryptd_queue *queue; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 40 | }; |
| 41 | |
| 42 | struct cryptd_blkcipher_ctx { |
| 43 | struct crypto_blkcipher *child; |
| 44 | }; |
| 45 | |
| 46 | struct cryptd_blkcipher_request_ctx { |
| 47 | crypto_completion_t complete; |
| 48 | }; |
| 49 | |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 50 | struct cryptd_hash_ctx { |
| 51 | struct crypto_hash *child; |
| 52 | }; |
| 53 | |
| 54 | struct cryptd_hash_request_ctx { |
| 55 | crypto_completion_t complete; |
| 56 | }; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 57 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 58 | static void cryptd_queue_worker(struct work_struct *work); |
| 59 | |
| 60 | static int cryptd_init_queue(struct cryptd_queue *queue, |
| 61 | unsigned int max_cpu_qlen) |
| 62 | { |
| 63 | int cpu; |
| 64 | struct cryptd_cpu_queue *cpu_queue; |
| 65 | |
| 66 | queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue); |
| 67 | if (!queue->cpu_queue) |
| 68 | return -ENOMEM; |
| 69 | for_each_possible_cpu(cpu) { |
| 70 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); |
| 71 | crypto_init_queue(&cpu_queue->queue, max_cpu_qlen); |
| 72 | INIT_WORK(&cpu_queue->work, cryptd_queue_worker); |
| 73 | } |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | static void cryptd_fini_queue(struct cryptd_queue *queue) |
| 78 | { |
| 79 | int cpu; |
| 80 | struct cryptd_cpu_queue *cpu_queue; |
| 81 | |
| 82 | for_each_possible_cpu(cpu) { |
| 83 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); |
| 84 | BUG_ON(cpu_queue->queue.qlen); |
| 85 | } |
| 86 | free_percpu(queue->cpu_queue); |
| 87 | } |
| 88 | |
| 89 | static int cryptd_enqueue_request(struct cryptd_queue *queue, |
| 90 | struct crypto_async_request *request) |
| 91 | { |
| 92 | int cpu, err; |
| 93 | struct cryptd_cpu_queue *cpu_queue; |
| 94 | |
| 95 | cpu = get_cpu(); |
| 96 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); |
| 97 | err = crypto_enqueue_request(&cpu_queue->queue, request); |
| 98 | queue_work_on(cpu, kcrypto_wq, &cpu_queue->work); |
| 99 | put_cpu(); |
| 100 | |
| 101 | return err; |
| 102 | } |
| 103 | |
| 104 | /* Called in workqueue context, do one real cryption work (via |
| 105 | * req->complete) and reschedule itself if there are more work to |
| 106 | * do. */ |
| 107 | static void cryptd_queue_worker(struct work_struct *work) |
| 108 | { |
| 109 | struct cryptd_cpu_queue *cpu_queue; |
| 110 | struct crypto_async_request *req, *backlog; |
| 111 | |
| 112 | cpu_queue = container_of(work, struct cryptd_cpu_queue, work); |
| 113 | /* Only handle one request at a time to avoid hogging crypto |
| 114 | * workqueue. preempt_disable/enable is used to prevent |
| 115 | * being preempted by cryptd_enqueue_request() */ |
| 116 | preempt_disable(); |
| 117 | backlog = crypto_get_backlog(&cpu_queue->queue); |
| 118 | req = crypto_dequeue_request(&cpu_queue->queue); |
| 119 | preempt_enable(); |
| 120 | |
| 121 | if (!req) |
| 122 | return; |
| 123 | |
| 124 | if (backlog) |
| 125 | backlog->complete(backlog, -EINPROGRESS); |
| 126 | req->complete(req, 0); |
| 127 | |
| 128 | if (cpu_queue->queue.qlen) |
| 129 | queue_work(kcrypto_wq, &cpu_queue->work); |
| 130 | } |
| 131 | |
| 132 | static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm) |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 133 | { |
| 134 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); |
| 135 | struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst); |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 136 | return ictx->queue; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent, |
| 140 | const u8 *key, unsigned int keylen) |
| 141 | { |
| 142 | struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent); |
| 143 | struct crypto_blkcipher *child = ctx->child; |
| 144 | int err; |
| 145 | |
| 146 | crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
| 147 | crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) & |
| 148 | CRYPTO_TFM_REQ_MASK); |
| 149 | err = crypto_blkcipher_setkey(child, key, keylen); |
| 150 | crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) & |
| 151 | CRYPTO_TFM_RES_MASK); |
| 152 | return err; |
| 153 | } |
| 154 | |
| 155 | static void cryptd_blkcipher_crypt(struct ablkcipher_request *req, |
| 156 | struct crypto_blkcipher *child, |
| 157 | int err, |
| 158 | int (*crypt)(struct blkcipher_desc *desc, |
| 159 | struct scatterlist *dst, |
| 160 | struct scatterlist *src, |
| 161 | unsigned int len)) |
| 162 | { |
| 163 | struct cryptd_blkcipher_request_ctx *rctx; |
| 164 | struct blkcipher_desc desc; |
| 165 | |
| 166 | rctx = ablkcipher_request_ctx(req); |
| 167 | |
Herbert Xu | 93aa7f8 | 2008-05-07 21:10:13 +0800 | [diff] [blame] | 168 | if (unlikely(err == -EINPROGRESS)) |
| 169 | goto out; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 170 | |
| 171 | desc.tfm = child; |
| 172 | desc.info = req->info; |
| 173 | desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
| 174 | |
| 175 | err = crypt(&desc, req->dst, req->src, req->nbytes); |
| 176 | |
| 177 | req->base.complete = rctx->complete; |
| 178 | |
Herbert Xu | 93aa7f8 | 2008-05-07 21:10:13 +0800 | [diff] [blame] | 179 | out: |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 180 | local_bh_disable(); |
Herbert Xu | 93aa7f8 | 2008-05-07 21:10:13 +0800 | [diff] [blame] | 181 | rctx->complete(&req->base, err); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 182 | local_bh_enable(); |
| 183 | } |
| 184 | |
| 185 | static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err) |
| 186 | { |
| 187 | struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm); |
| 188 | struct crypto_blkcipher *child = ctx->child; |
| 189 | |
| 190 | cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err, |
| 191 | crypto_blkcipher_crt(child)->encrypt); |
| 192 | } |
| 193 | |
| 194 | static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err) |
| 195 | { |
| 196 | struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm); |
| 197 | struct crypto_blkcipher *child = ctx->child; |
| 198 | |
| 199 | cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err, |
| 200 | crypto_blkcipher_crt(child)->decrypt); |
| 201 | } |
| 202 | |
| 203 | static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req, |
| 204 | crypto_completion_t complete) |
| 205 | { |
| 206 | struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req); |
| 207 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 208 | struct cryptd_queue *queue; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 209 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 210 | queue = cryptd_get_queue(crypto_ablkcipher_tfm(tfm)); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 211 | rctx->complete = req->base.complete; |
| 212 | req->base.complete = complete; |
| 213 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 214 | return cryptd_enqueue_request(queue, &req->base); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req) |
| 218 | { |
| 219 | return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt); |
| 220 | } |
| 221 | |
| 222 | static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req) |
| 223 | { |
| 224 | return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt); |
| 225 | } |
| 226 | |
| 227 | static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm) |
| 228 | { |
| 229 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); |
| 230 | struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst); |
| 231 | struct crypto_spawn *spawn = &ictx->spawn; |
| 232 | struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm); |
| 233 | struct crypto_blkcipher *cipher; |
| 234 | |
| 235 | cipher = crypto_spawn_blkcipher(spawn); |
| 236 | if (IS_ERR(cipher)) |
| 237 | return PTR_ERR(cipher); |
| 238 | |
| 239 | ctx->child = cipher; |
| 240 | tfm->crt_ablkcipher.reqsize = |
| 241 | sizeof(struct cryptd_blkcipher_request_ctx); |
| 242 | return 0; |
| 243 | } |
| 244 | |
| 245 | static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm) |
| 246 | { |
| 247 | struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 248 | |
| 249 | crypto_free_blkcipher(ctx->child); |
| 250 | } |
| 251 | |
| 252 | static struct crypto_instance *cryptd_alloc_instance(struct crypto_alg *alg, |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 253 | struct cryptd_queue *queue) |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 254 | { |
| 255 | struct crypto_instance *inst; |
| 256 | struct cryptd_instance_ctx *ctx; |
| 257 | int err; |
| 258 | |
| 259 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); |
Julia Lawall | b1145ce | 2008-04-30 00:27:14 +0800 | [diff] [blame] | 260 | if (!inst) { |
| 261 | inst = ERR_PTR(-ENOMEM); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 262 | goto out; |
Julia Lawall | b1145ce | 2008-04-30 00:27:14 +0800 | [diff] [blame] | 263 | } |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 264 | |
| 265 | err = -ENAMETOOLONG; |
| 266 | if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
| 267 | "cryptd(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) |
| 268 | goto out_free_inst; |
| 269 | |
| 270 | ctx = crypto_instance_ctx(inst); |
| 271 | err = crypto_init_spawn(&ctx->spawn, alg, inst, |
| 272 | CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC); |
| 273 | if (err) |
| 274 | goto out_free_inst; |
| 275 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 276 | ctx->queue = queue; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 277 | |
| 278 | memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); |
| 279 | |
| 280 | inst->alg.cra_priority = alg->cra_priority + 50; |
| 281 | inst->alg.cra_blocksize = alg->cra_blocksize; |
| 282 | inst->alg.cra_alignmask = alg->cra_alignmask; |
| 283 | |
| 284 | out: |
| 285 | return inst; |
| 286 | |
| 287 | out_free_inst: |
| 288 | kfree(inst); |
| 289 | inst = ERR_PTR(err); |
| 290 | goto out; |
| 291 | } |
| 292 | |
| 293 | static struct crypto_instance *cryptd_alloc_blkcipher( |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 294 | struct rtattr **tb, struct cryptd_queue *queue) |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 295 | { |
| 296 | struct crypto_instance *inst; |
| 297 | struct crypto_alg *alg; |
| 298 | |
| 299 | alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_BLKCIPHER, |
Herbert Xu | 332f884 | 2007-11-15 22:36:07 +0800 | [diff] [blame] | 300 | CRYPTO_ALG_TYPE_MASK); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 301 | if (IS_ERR(alg)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 302 | return ERR_CAST(alg); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 303 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 304 | inst = cryptd_alloc_instance(alg, queue); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 305 | if (IS_ERR(inst)) |
| 306 | goto out_put_alg; |
| 307 | |
Herbert Xu | 332f884 | 2007-11-15 22:36:07 +0800 | [diff] [blame] | 308 | inst->alg.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 309 | inst->alg.cra_type = &crypto_ablkcipher_type; |
| 310 | |
| 311 | inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize; |
| 312 | inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize; |
| 313 | inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize; |
| 314 | |
Herbert Xu | 927eead | 2007-11-27 21:15:31 +0800 | [diff] [blame] | 315 | inst->alg.cra_ablkcipher.geniv = alg->cra_blkcipher.geniv; |
| 316 | |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 317 | inst->alg.cra_ctxsize = sizeof(struct cryptd_blkcipher_ctx); |
| 318 | |
| 319 | inst->alg.cra_init = cryptd_blkcipher_init_tfm; |
| 320 | inst->alg.cra_exit = cryptd_blkcipher_exit_tfm; |
| 321 | |
| 322 | inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey; |
| 323 | inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue; |
| 324 | inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue; |
| 325 | |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 326 | out_put_alg: |
| 327 | crypto_mod_put(alg); |
| 328 | return inst; |
| 329 | } |
| 330 | |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 331 | static int cryptd_hash_init_tfm(struct crypto_tfm *tfm) |
| 332 | { |
| 333 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); |
| 334 | struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst); |
| 335 | struct crypto_spawn *spawn = &ictx->spawn; |
| 336 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); |
| 337 | struct crypto_hash *cipher; |
| 338 | |
| 339 | cipher = crypto_spawn_hash(spawn); |
| 340 | if (IS_ERR(cipher)) |
| 341 | return PTR_ERR(cipher); |
| 342 | |
| 343 | ctx->child = cipher; |
| 344 | tfm->crt_ahash.reqsize = |
| 345 | sizeof(struct cryptd_hash_request_ctx); |
| 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm) |
| 350 | { |
| 351 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 352 | |
| 353 | crypto_free_hash(ctx->child); |
| 354 | } |
| 355 | |
| 356 | static int cryptd_hash_setkey(struct crypto_ahash *parent, |
| 357 | const u8 *key, unsigned int keylen) |
| 358 | { |
| 359 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent); |
| 360 | struct crypto_hash *child = ctx->child; |
| 361 | int err; |
| 362 | |
| 363 | crypto_hash_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
| 364 | crypto_hash_set_flags(child, crypto_ahash_get_flags(parent) & |
| 365 | CRYPTO_TFM_REQ_MASK); |
| 366 | err = crypto_hash_setkey(child, key, keylen); |
| 367 | crypto_ahash_set_flags(parent, crypto_hash_get_flags(child) & |
| 368 | CRYPTO_TFM_RES_MASK); |
| 369 | return err; |
| 370 | } |
| 371 | |
| 372 | static int cryptd_hash_enqueue(struct ahash_request *req, |
| 373 | crypto_completion_t complete) |
| 374 | { |
| 375 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 376 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 377 | struct cryptd_queue *queue = |
| 378 | cryptd_get_queue(crypto_ahash_tfm(tfm)); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 379 | |
| 380 | rctx->complete = req->base.complete; |
| 381 | req->base.complete = complete; |
| 382 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 383 | return cryptd_enqueue_request(queue, &req->base); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 384 | } |
| 385 | |
| 386 | static void cryptd_hash_init(struct crypto_async_request *req_async, int err) |
| 387 | { |
| 388 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); |
| 389 | struct crypto_hash *child = ctx->child; |
| 390 | struct ahash_request *req = ahash_request_cast(req_async); |
| 391 | struct cryptd_hash_request_ctx *rctx; |
| 392 | struct hash_desc desc; |
| 393 | |
| 394 | rctx = ahash_request_ctx(req); |
| 395 | |
| 396 | if (unlikely(err == -EINPROGRESS)) |
| 397 | goto out; |
| 398 | |
| 399 | desc.tfm = child; |
| 400 | desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
| 401 | |
| 402 | err = crypto_hash_crt(child)->init(&desc); |
| 403 | |
| 404 | req->base.complete = rctx->complete; |
| 405 | |
| 406 | out: |
| 407 | local_bh_disable(); |
| 408 | rctx->complete(&req->base, err); |
| 409 | local_bh_enable(); |
| 410 | } |
| 411 | |
| 412 | static int cryptd_hash_init_enqueue(struct ahash_request *req) |
| 413 | { |
| 414 | return cryptd_hash_enqueue(req, cryptd_hash_init); |
| 415 | } |
| 416 | |
| 417 | static void cryptd_hash_update(struct crypto_async_request *req_async, int err) |
| 418 | { |
| 419 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); |
| 420 | struct crypto_hash *child = ctx->child; |
| 421 | struct ahash_request *req = ahash_request_cast(req_async); |
| 422 | struct cryptd_hash_request_ctx *rctx; |
| 423 | struct hash_desc desc; |
| 424 | |
| 425 | rctx = ahash_request_ctx(req); |
| 426 | |
| 427 | if (unlikely(err == -EINPROGRESS)) |
| 428 | goto out; |
| 429 | |
| 430 | desc.tfm = child; |
| 431 | desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
| 432 | |
| 433 | err = crypto_hash_crt(child)->update(&desc, |
| 434 | req->src, |
| 435 | req->nbytes); |
| 436 | |
| 437 | req->base.complete = rctx->complete; |
| 438 | |
| 439 | out: |
| 440 | local_bh_disable(); |
| 441 | rctx->complete(&req->base, err); |
| 442 | local_bh_enable(); |
| 443 | } |
| 444 | |
| 445 | static int cryptd_hash_update_enqueue(struct ahash_request *req) |
| 446 | { |
| 447 | return cryptd_hash_enqueue(req, cryptd_hash_update); |
| 448 | } |
| 449 | |
| 450 | static void cryptd_hash_final(struct crypto_async_request *req_async, int err) |
| 451 | { |
| 452 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); |
| 453 | struct crypto_hash *child = ctx->child; |
| 454 | struct ahash_request *req = ahash_request_cast(req_async); |
| 455 | struct cryptd_hash_request_ctx *rctx; |
| 456 | struct hash_desc desc; |
| 457 | |
| 458 | rctx = ahash_request_ctx(req); |
| 459 | |
| 460 | if (unlikely(err == -EINPROGRESS)) |
| 461 | goto out; |
| 462 | |
| 463 | desc.tfm = child; |
| 464 | desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
| 465 | |
| 466 | err = crypto_hash_crt(child)->final(&desc, req->result); |
| 467 | |
| 468 | req->base.complete = rctx->complete; |
| 469 | |
| 470 | out: |
| 471 | local_bh_disable(); |
| 472 | rctx->complete(&req->base, err); |
| 473 | local_bh_enable(); |
| 474 | } |
| 475 | |
| 476 | static int cryptd_hash_final_enqueue(struct ahash_request *req) |
| 477 | { |
| 478 | return cryptd_hash_enqueue(req, cryptd_hash_final); |
| 479 | } |
| 480 | |
| 481 | static void cryptd_hash_digest(struct crypto_async_request *req_async, int err) |
| 482 | { |
| 483 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); |
| 484 | struct crypto_hash *child = ctx->child; |
| 485 | struct ahash_request *req = ahash_request_cast(req_async); |
| 486 | struct cryptd_hash_request_ctx *rctx; |
| 487 | struct hash_desc desc; |
| 488 | |
| 489 | rctx = ahash_request_ctx(req); |
| 490 | |
| 491 | if (unlikely(err == -EINPROGRESS)) |
| 492 | goto out; |
| 493 | |
| 494 | desc.tfm = child; |
| 495 | desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
| 496 | |
| 497 | err = crypto_hash_crt(child)->digest(&desc, |
| 498 | req->src, |
| 499 | req->nbytes, |
| 500 | req->result); |
| 501 | |
| 502 | req->base.complete = rctx->complete; |
| 503 | |
| 504 | out: |
| 505 | local_bh_disable(); |
| 506 | rctx->complete(&req->base, err); |
| 507 | local_bh_enable(); |
| 508 | } |
| 509 | |
| 510 | static int cryptd_hash_digest_enqueue(struct ahash_request *req) |
| 511 | { |
| 512 | return cryptd_hash_enqueue(req, cryptd_hash_digest); |
| 513 | } |
| 514 | |
| 515 | static struct crypto_instance *cryptd_alloc_hash( |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 516 | struct rtattr **tb, struct cryptd_queue *queue) |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 517 | { |
| 518 | struct crypto_instance *inst; |
| 519 | struct crypto_alg *alg; |
| 520 | |
| 521 | alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_HASH, |
| 522 | CRYPTO_ALG_TYPE_HASH_MASK); |
| 523 | if (IS_ERR(alg)) |
| 524 | return ERR_PTR(PTR_ERR(alg)); |
| 525 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 526 | inst = cryptd_alloc_instance(alg, queue); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 527 | if (IS_ERR(inst)) |
| 528 | goto out_put_alg; |
| 529 | |
| 530 | inst->alg.cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC; |
| 531 | inst->alg.cra_type = &crypto_ahash_type; |
| 532 | |
| 533 | inst->alg.cra_ahash.digestsize = alg->cra_hash.digestsize; |
| 534 | inst->alg.cra_ctxsize = sizeof(struct cryptd_hash_ctx); |
| 535 | |
| 536 | inst->alg.cra_init = cryptd_hash_init_tfm; |
| 537 | inst->alg.cra_exit = cryptd_hash_exit_tfm; |
| 538 | |
| 539 | inst->alg.cra_ahash.init = cryptd_hash_init_enqueue; |
| 540 | inst->alg.cra_ahash.update = cryptd_hash_update_enqueue; |
| 541 | inst->alg.cra_ahash.final = cryptd_hash_final_enqueue; |
| 542 | inst->alg.cra_ahash.setkey = cryptd_hash_setkey; |
| 543 | inst->alg.cra_ahash.digest = cryptd_hash_digest_enqueue; |
| 544 | |
| 545 | out_put_alg: |
| 546 | crypto_mod_put(alg); |
| 547 | return inst; |
| 548 | } |
| 549 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 550 | static struct cryptd_queue queue; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 551 | |
| 552 | static struct crypto_instance *cryptd_alloc(struct rtattr **tb) |
| 553 | { |
| 554 | struct crypto_attr_type *algt; |
| 555 | |
| 556 | algt = crypto_get_attr_type(tb); |
| 557 | if (IS_ERR(algt)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 558 | return ERR_CAST(algt); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 559 | |
| 560 | switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { |
| 561 | case CRYPTO_ALG_TYPE_BLKCIPHER: |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 562 | return cryptd_alloc_blkcipher(tb, &queue); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 563 | case CRYPTO_ALG_TYPE_DIGEST: |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 564 | return cryptd_alloc_hash(tb, &queue); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 565 | } |
| 566 | |
| 567 | return ERR_PTR(-EINVAL); |
| 568 | } |
| 569 | |
| 570 | static void cryptd_free(struct crypto_instance *inst) |
| 571 | { |
| 572 | struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst); |
| 573 | |
| 574 | crypto_drop_spawn(&ctx->spawn); |
| 575 | kfree(inst); |
| 576 | } |
| 577 | |
| 578 | static struct crypto_template cryptd_tmpl = { |
| 579 | .name = "cryptd", |
| 580 | .alloc = cryptd_alloc, |
| 581 | .free = cryptd_free, |
| 582 | .module = THIS_MODULE, |
| 583 | }; |
| 584 | |
Huang Ying | 1cac2cb | 2009-01-18 16:19:46 +1100 | [diff] [blame] | 585 | struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name, |
| 586 | u32 type, u32 mask) |
| 587 | { |
| 588 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; |
Huang Ying | 505fd21 | 2009-03-29 15:33:53 +0800 | [diff] [blame^] | 589 | struct crypto_tfm *tfm; |
Huang Ying | 1cac2cb | 2009-01-18 16:19:46 +1100 | [diff] [blame] | 590 | |
| 591 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, |
| 592 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) |
| 593 | return ERR_PTR(-EINVAL); |
Huang Ying | 505fd21 | 2009-03-29 15:33:53 +0800 | [diff] [blame^] | 594 | type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV); |
| 595 | type |= CRYPTO_ALG_TYPE_BLKCIPHER; |
| 596 | mask &= ~CRYPTO_ALG_TYPE_MASK; |
| 597 | mask |= (CRYPTO_ALG_GENIV | CRYPTO_ALG_TYPE_BLKCIPHER_MASK); |
| 598 | tfm = crypto_alloc_base(cryptd_alg_name, type, mask); |
Huang Ying | 1cac2cb | 2009-01-18 16:19:46 +1100 | [diff] [blame] | 599 | if (IS_ERR(tfm)) |
| 600 | return ERR_CAST(tfm); |
Huang Ying | 505fd21 | 2009-03-29 15:33:53 +0800 | [diff] [blame^] | 601 | if (tfm->__crt_alg->cra_module != THIS_MODULE) { |
| 602 | crypto_free_tfm(tfm); |
Huang Ying | 1cac2cb | 2009-01-18 16:19:46 +1100 | [diff] [blame] | 603 | return ERR_PTR(-EINVAL); |
| 604 | } |
| 605 | |
Huang Ying | 505fd21 | 2009-03-29 15:33:53 +0800 | [diff] [blame^] | 606 | return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm)); |
Huang Ying | 1cac2cb | 2009-01-18 16:19:46 +1100 | [diff] [blame] | 607 | } |
| 608 | EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher); |
| 609 | |
| 610 | struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm) |
| 611 | { |
| 612 | struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base); |
| 613 | return ctx->child; |
| 614 | } |
| 615 | EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child); |
| 616 | |
| 617 | void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm) |
| 618 | { |
| 619 | crypto_free_ablkcipher(&tfm->base); |
| 620 | } |
| 621 | EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher); |
| 622 | |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 623 | static int __init cryptd_init(void) |
| 624 | { |
| 625 | int err; |
| 626 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 627 | err = cryptd_init_queue(&queue, CRYPTD_MAX_CPU_QLEN); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 628 | if (err) |
| 629 | return err; |
| 630 | |
| 631 | err = crypto_register_template(&cryptd_tmpl); |
| 632 | if (err) |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 633 | cryptd_fini_queue(&queue); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 634 | |
| 635 | return err; |
| 636 | } |
| 637 | |
| 638 | static void __exit cryptd_exit(void) |
| 639 | { |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 640 | cryptd_fini_queue(&queue); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 641 | crypto_unregister_template(&cryptd_tmpl); |
| 642 | } |
| 643 | |
| 644 | module_init(cryptd_init); |
| 645 | module_exit(cryptd_exit); |
| 646 | |
| 647 | MODULE_LICENSE("GPL"); |
| 648 | MODULE_DESCRIPTION("Software async crypto daemon"); |