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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include <crypto/algapi.h>#include <crypto/internal/aead.h>#include <linux/atomic.h>#include <linux/err.h>#include <linux/init.h>#include <linux/module.h>#include <linux/slab.h>#include <linux/kobject.h>#include <linux/cpu.h>#include <crypto/pcrypt.h>
static struct padata_instance *pencrypt;static struct padata_instance *pdecrypt;static struct kset *pcrypt_kset;
struct pcrypt_instance_ctx { struct crypto_aead_spawn spawn; struct padata_shell *psenc; struct padata_shell *psdec; atomic_t tfm_count;};
struct pcrypt_aead_ctx { struct crypto_aead *child; unsigned int cb_cpu;};
static inline struct pcrypt_instance_ctx *pcrypt_tfm_ictx( struct crypto_aead *tfm){ return aead_instance_ctx(aead_alg_instance(tfm));}
static int pcrypt_aead_setkey(struct crypto_aead *parent, const u8 *key, unsigned int keylen){ struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
return crypto_aead_setkey(ctx->child, key, keylen);}
static int pcrypt_aead_setauthsize(struct crypto_aead *parent, unsigned int authsize){ struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
return crypto_aead_setauthsize(ctx->child, authsize);}
static void pcrypt_aead_serial(struct padata_priv *padata){ struct pcrypt_request *preq = pcrypt_padata_request(padata); struct aead_request *req = pcrypt_request_ctx(preq);
aead_request_complete(req->base.data, padata->info);}
static void pcrypt_aead_done(void *data, int err){ struct aead_request *req = data; struct pcrypt_request *preq = aead_request_ctx(req); struct padata_priv *padata = pcrypt_request_padata(preq);
if (err == -EINPROGRESS) return;
padata->info = err;
padata_do_serial(padata);}
static void pcrypt_aead_enc(struct padata_priv *padata){ struct pcrypt_request *preq = pcrypt_padata_request(padata); struct aead_request *req = pcrypt_request_ctx(preq); int ret;
ret = crypto_aead_encrypt(req);
if (ret == -EINPROGRESS || ret == -EBUSY) return;
padata->info = ret; padata_do_serial(padata);}
static int pcrypt_aead_encrypt(struct aead_request *req){ int err; struct pcrypt_request *preq = aead_request_ctx(req); struct aead_request *creq = pcrypt_request_ctx(preq); struct padata_priv *padata = pcrypt_request_padata(preq); struct crypto_aead *aead = crypto_aead_reqtfm(req); struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead); u32 flags = aead_request_flags(req); struct pcrypt_instance_ctx *ictx;
ictx = pcrypt_tfm_ictx(aead);
memset(padata, 0, sizeof(struct padata_priv));
padata->parallel = pcrypt_aead_enc; padata->serial = pcrypt_aead_serial;
aead_request_set_tfm(creq, ctx->child); aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP, pcrypt_aead_done, req); aead_request_set_crypt(creq, req->src, req->dst, req->cryptlen, req->iv); aead_request_set_ad(creq, req->assoclen);
err = padata_do_parallel(ictx->psenc, padata, &ctx->cb_cpu); if (!err) return -EINPROGRESS; if (err == -EBUSY) { /* try non-parallel mode */ aead_request_set_callback(creq, flags, req->base.complete, req->base.data); return crypto_aead_encrypt(creq); }
return err;}
static void pcrypt_aead_dec(struct padata_priv *padata){ struct pcrypt_request *preq = pcrypt_padata_request(padata); struct aead_request *req = pcrypt_request_ctx(preq); int ret;
ret = crypto_aead_decrypt(req);
if (ret == -EINPROGRESS || ret == -EBUSY) return;
padata->info = ret; padata_do_serial(padata);}
static int pcrypt_aead_decrypt(struct aead_request *req){ int err; struct pcrypt_request *preq = aead_request_ctx(req); struct aead_request *creq = pcrypt_request_ctx(preq); struct padata_priv *padata = pcrypt_request_padata(preq); struct crypto_aead *aead = crypto_aead_reqtfm(req); struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead); u32 flags = aead_request_flags(req); struct pcrypt_instance_ctx *ictx;
ictx = pcrypt_tfm_ictx(aead);
memset(padata, 0, sizeof(struct padata_priv));
padata->parallel = pcrypt_aead_dec; padata->serial = pcrypt_aead_serial;
aead_request_set_tfm(creq, ctx->child); aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP, pcrypt_aead_done, req); aead_request_set_crypt(creq, req->src, req->dst, req->cryptlen, req->iv); aead_request_set_ad(creq, req->assoclen);
err = padata_do_parallel(ictx->psdec, padata, &ctx->cb_cpu); if (!err) return -EINPROGRESS; if (err == -EBUSY) { /* try non-parallel mode */ aead_request_set_callback(creq, flags, req->base.complete, req->base.data); return crypto_aead_decrypt(creq); }
return err;}
static int pcrypt_aead_init_tfm(struct crypto_aead *tfm){ int cpu_index; struct aead_instance *inst = aead_alg_instance(tfm); struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst); struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm); struct crypto_aead *cipher;
cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) % cpumask_weight(cpu_online_mask);
ctx->cb_cpu = cpumask_nth(cpu_index, cpu_online_mask); cipher = crypto_spawn_aead(&ictx->spawn);
if (IS_ERR(cipher)) return PTR_ERR(cipher);
ctx->child = cipher; crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) + sizeof(struct aead_request) + crypto_aead_reqsize(cipher));
return 0;}
static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm){ struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
crypto_free_aead(ctx->child);}
static void pcrypt_free(struct aead_instance *inst){ struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst);
crypto_drop_aead(&ctx->spawn); padata_free_shell(ctx->psdec); padata_free_shell(ctx->psenc); kfree(inst);}
static int pcrypt_init_instance(struct crypto_instance *inst, struct crypto_alg *alg){ if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, "pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) return -ENAMETOOLONG;
memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
inst->alg.cra_priority = alg->cra_priority + 100; inst->alg.cra_blocksize = alg->cra_blocksize; inst->alg.cra_alignmask = alg->cra_alignmask;
return 0;}
static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb, struct crypto_attr_type *algt){ struct pcrypt_instance_ctx *ctx; struct aead_instance *inst; struct aead_alg *alg; u32 mask = crypto_algt_inherited_mask(algt); int err;
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); if (!inst) return -ENOMEM;
err = -ENOMEM;
ctx = aead_instance_ctx(inst); ctx->psenc = padata_alloc_shell(pencrypt); if (!ctx->psenc) goto err_free_inst;
ctx->psdec = padata_alloc_shell(pdecrypt); if (!ctx->psdec) goto err_free_inst;
err = crypto_grab_aead(&ctx->spawn, aead_crypto_instance(inst), crypto_attr_alg_name(tb[1]), 0, mask); if (err) goto err_free_inst;
alg = crypto_spawn_aead_alg(&ctx->spawn); err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base); if (err) goto err_free_inst;
inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC;
inst->alg.ivsize = crypto_aead_alg_ivsize(alg); inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);
inst->alg.init = pcrypt_aead_init_tfm; inst->alg.exit = pcrypt_aead_exit_tfm;
inst->alg.setkey = pcrypt_aead_setkey; inst->alg.setauthsize = pcrypt_aead_setauthsize; inst->alg.encrypt = pcrypt_aead_encrypt; inst->alg.decrypt = pcrypt_aead_decrypt;
inst->free = pcrypt_free;
err = aead_register_instance(tmpl, inst); if (err) {err_free_inst: pcrypt_free(inst); } return err;}
static int pcrypt_create(struct crypto_template *tmpl, struct rtattr **tb){ struct crypto_attr_type *algt;
algt = crypto_get_attr_type(tb); if (IS_ERR(algt)) return PTR_ERR(algt);
switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { case CRYPTO_ALG_TYPE_AEAD: return pcrypt_create_aead(tmpl, tb, algt); }
return -EINVAL;}
static int pcrypt_sysfs_add(struct padata_instance *pinst, const char *name){ int ret;
pinst->kobj.kset = pcrypt_kset; ret = kobject_add(&pinst->kobj, NULL, "%s", name); if (!ret) kobject_uevent(&pinst->kobj, KOBJ_ADD);
return ret;}
static int pcrypt_init_padata(struct padata_instance **pinst, const char *name){ int ret = -ENOMEM;
*pinst = padata_alloc(name); if (!*pinst) return ret;
ret = pcrypt_sysfs_add(*pinst, name); if (ret) padata_free(*pinst);
return ret;}
static struct crypto_template pcrypt_tmpl = { .name = "pcrypt", .create = pcrypt_create, .module = THIS_MODULE,};
static int __init pcrypt_init(void){ int err = -ENOMEM;
pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj); if (!pcrypt_kset) goto err;
err = pcrypt_init_padata(&pencrypt, "pencrypt"); if (err) goto err_unreg_kset;
err = pcrypt_init_padata(&pdecrypt, "pdecrypt"); if (err) goto err_deinit_pencrypt;
return crypto_register_template(&pcrypt_tmpl);
err_deinit_pencrypt: padata_free(pencrypt);err_unreg_kset: kset_unregister(pcrypt_kset);err: return err;}
static void __exit pcrypt_exit(void){ crypto_unregister_template(&pcrypt_tmpl);
padata_free(pencrypt); padata_free(pdecrypt);
kset_unregister(pcrypt_kset);}
module_init(pcrypt_init);module_exit(pcrypt_exit);
MODULE_LICENSE("GPL");MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");MODULE_DESCRIPTION("Parallel crypto wrapper");MODULE_ALIAS_CRYPTO("pcrypt");