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-rw-r--r--crypto/mcryptd.c675
1 files changed, 0 insertions, 675 deletions
diff --git a/crypto/mcryptd.c b/crypto/mcryptd.c
deleted file mode 100644
index f14152147ce8..000000000000
--- a/crypto/mcryptd.c
+++ /dev/null
@@ -1,675 +0,0 @@
-/*
- * Software multibuffer async crypto daemon.
- *
- * Copyright (c) 2014 Tim Chen <tim.c.chen@linux.intel.com>
- *
- * Adapted from crypto daemon.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- */
-
-#include <crypto/algapi.h>
-#include <crypto/internal/hash.h>
-#include <crypto/internal/aead.h>
-#include <crypto/mcryptd.h>
-#include <crypto/crypto_wq.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/scatterlist.h>
-#include <linux/sched.h>
-#include <linux/sched/stat.h>
-#include <linux/slab.h>
-
-#define MCRYPTD_MAX_CPU_QLEN 100
-#define MCRYPTD_BATCH 9
-
-static void *mcryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
- unsigned int tail);
-
-struct mcryptd_flush_list {
- struct list_head list;
- struct mutex lock;
-};
-
-static struct mcryptd_flush_list __percpu *mcryptd_flist;
-
-struct hashd_instance_ctx {
- struct crypto_ahash_spawn spawn;
- struct mcryptd_queue *queue;
-};
-
-static void mcryptd_queue_worker(struct work_struct *work);
-
-void mcryptd_arm_flusher(struct mcryptd_alg_cstate *cstate, unsigned long delay)
-{
- struct mcryptd_flush_list *flist;
-
- if (!cstate->flusher_engaged) {
- /* put the flusher on the flush list */
- flist = per_cpu_ptr(mcryptd_flist, smp_processor_id());
- mutex_lock(&flist->lock);
- list_add_tail(&cstate->flush_list, &flist->list);
- cstate->flusher_engaged = true;
- cstate->next_flush = jiffies + delay;
- queue_delayed_work_on(smp_processor_id(), kcrypto_wq,
- &cstate->flush, delay);
- mutex_unlock(&flist->lock);
- }
-}
-EXPORT_SYMBOL(mcryptd_arm_flusher);
-
-static int mcryptd_init_queue(struct mcryptd_queue *queue,
- unsigned int max_cpu_qlen)
-{
- int cpu;
- struct mcryptd_cpu_queue *cpu_queue;
-
- queue->cpu_queue = alloc_percpu(struct mcryptd_cpu_queue);
- pr_debug("mqueue:%p mcryptd_cpu_queue %p\n", queue, queue->cpu_queue);
- if (!queue->cpu_queue)
- return -ENOMEM;
- for_each_possible_cpu(cpu) {
- cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
- pr_debug("cpu_queue #%d %p\n", cpu, queue->cpu_queue);
- crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
- INIT_WORK(&cpu_queue->work, mcryptd_queue_worker);
- spin_lock_init(&cpu_queue->q_lock);
- }
- return 0;
-}
-
-static void mcryptd_fini_queue(struct mcryptd_queue *queue)
-{
- int cpu;
- struct mcryptd_cpu_queue *cpu_queue;
-
- for_each_possible_cpu(cpu) {
- cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
- BUG_ON(cpu_queue->queue.qlen);
- }
- free_percpu(queue->cpu_queue);
-}
-
-static int mcryptd_enqueue_request(struct mcryptd_queue *queue,
- struct crypto_async_request *request,
- struct mcryptd_hash_request_ctx *rctx)
-{
- int cpu, err;
- struct mcryptd_cpu_queue *cpu_queue;
-
- cpu_queue = raw_cpu_ptr(queue->cpu_queue);
- spin_lock(&cpu_queue->q_lock);
- cpu = smp_processor_id();
- rctx->tag.cpu = smp_processor_id();
-
- err = crypto_enqueue_request(&cpu_queue->queue, request);
- pr_debug("enqueue request: cpu %d cpu_queue %p request %p\n",
- cpu, cpu_queue, request);
- spin_unlock(&cpu_queue->q_lock);
- queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
-
- return err;
-}
-
-/*
- * Try to opportunisticlly flush the partially completed jobs if
- * crypto daemon is the only task running.
- */
-static void mcryptd_opportunistic_flush(void)
-{
- struct mcryptd_flush_list *flist;
- struct mcryptd_alg_cstate *cstate;
-
- flist = per_cpu_ptr(mcryptd_flist, smp_processor_id());
- while (single_task_running()) {
- mutex_lock(&flist->lock);
- cstate = list_first_entry_or_null(&flist->list,
- struct mcryptd_alg_cstate, flush_list);
- if (!cstate || !cstate->flusher_engaged) {
- mutex_unlock(&flist->lock);
- return;
- }
- list_del(&cstate->flush_list);
- cstate->flusher_engaged = false;
- mutex_unlock(&flist->lock);
- cstate->alg_state->flusher(cstate);
- }
-}
-
-/*
- * Called in workqueue context, do one real cryption work (via
- * req->complete) and reschedule itself if there are more work to
- * do.
- */
-static void mcryptd_queue_worker(struct work_struct *work)
-{
- struct mcryptd_cpu_queue *cpu_queue;
- struct crypto_async_request *req, *backlog;
- int i;
-
- /*
- * Need to loop through more than once for multi-buffer to
- * be effective.
- */
-
- cpu_queue = container_of(work, struct mcryptd_cpu_queue, work);
- i = 0;
- while (i < MCRYPTD_BATCH || single_task_running()) {
-
- spin_lock_bh(&cpu_queue->q_lock);
- backlog = crypto_get_backlog(&cpu_queue->queue);
- req = crypto_dequeue_request(&cpu_queue->queue);
- spin_unlock_bh(&cpu_queue->q_lock);
-
- if (!req) {
- mcryptd_opportunistic_flush();
- return;
- }
-
- if (backlog)
- backlog->complete(backlog, -EINPROGRESS);
- req->complete(req, 0);
- if (!cpu_queue->queue.qlen)
- return;
- ++i;
- }
- if (cpu_queue->queue.qlen)
- queue_work_on(smp_processor_id(), kcrypto_wq, &cpu_queue->work);
-}
-
-void mcryptd_flusher(struct work_struct *__work)
-{
- struct mcryptd_alg_cstate *alg_cpu_state;
- struct mcryptd_alg_state *alg_state;
- struct mcryptd_flush_list *flist;
- int cpu;
-
- cpu = smp_processor_id();
- alg_cpu_state = container_of(to_delayed_work(__work),
- struct mcryptd_alg_cstate, flush);
- alg_state = alg_cpu_state->alg_state;
- if (alg_cpu_state->cpu != cpu)
- pr_debug("mcryptd error: work on cpu %d, should be cpu %d\n",
- cpu, alg_cpu_state->cpu);
-
- if (alg_cpu_state->flusher_engaged) {
- flist = per_cpu_ptr(mcryptd_flist, cpu);
- mutex_lock(&flist->lock);
- list_del(&alg_cpu_state->flush_list);
- alg_cpu_state->flusher_engaged = false;
- mutex_unlock(&flist->lock);
- alg_state->flusher(alg_cpu_state);
- }
-}
-EXPORT_SYMBOL_GPL(mcryptd_flusher);
-
-static inline struct mcryptd_queue *mcryptd_get_queue(struct crypto_tfm *tfm)
-{
- struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
- struct mcryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
-
- return ictx->queue;
-}
-
-static void *mcryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
- unsigned int tail)
-{
- char *p;
- struct crypto_instance *inst;
- int err;
-
- p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
- if (!p)
- return ERR_PTR(-ENOMEM);
-
- inst = (void *)(p + head);
-
- err = -ENAMETOOLONG;
- if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
- "mcryptd(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
- goto out_free_inst;
-
- memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
-
- inst->alg.cra_priority = alg->cra_priority + 50;
- inst->alg.cra_blocksize = alg->cra_blocksize;
- inst->alg.cra_alignmask = alg->cra_alignmask;
-
-out:
- return p;
-
-out_free_inst:
- kfree(p);
- p = ERR_PTR(err);
- goto out;
-}
-
-static inline bool mcryptd_check_internal(struct rtattr **tb, u32 *type,
- u32 *mask)
-{
- struct crypto_attr_type *algt;
-
- algt = crypto_get_attr_type(tb);
- if (IS_ERR(algt))
- return false;
-
- *type |= algt->type & CRYPTO_ALG_INTERNAL;
- *mask |= algt->mask & CRYPTO_ALG_INTERNAL;
-
- if (*type & *mask & CRYPTO_ALG_INTERNAL)
- return true;
- else
- return false;
-}
-
-static int mcryptd_hash_init_tfm(struct crypto_tfm *tfm)
-{
- struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
- struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
- struct crypto_ahash_spawn *spawn = &ictx->spawn;
- struct mcryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
- struct crypto_ahash *hash;
-
- hash = crypto_spawn_ahash(spawn);
- if (IS_ERR(hash))
- return PTR_ERR(hash);
-
- ctx->child = hash;
- crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
- sizeof(struct mcryptd_hash_request_ctx) +
- crypto_ahash_reqsize(hash));
- return 0;
-}
-
-static void mcryptd_hash_exit_tfm(struct crypto_tfm *tfm)
-{
- struct mcryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
-
- crypto_free_ahash(ctx->child);
-}
-
-static int mcryptd_hash_setkey(struct crypto_ahash *parent,
- const u8 *key, unsigned int keylen)
-{
- struct mcryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
- struct crypto_ahash *child = ctx->child;
- int err;
-
- crypto_ahash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
- crypto_ahash_set_flags(child, crypto_ahash_get_flags(parent) &
- CRYPTO_TFM_REQ_MASK);
- err = crypto_ahash_setkey(child, key, keylen);
- crypto_ahash_set_flags(parent, crypto_ahash_get_flags(child) &
- CRYPTO_TFM_RES_MASK);
- return err;
-}
-
-static int mcryptd_hash_enqueue(struct ahash_request *req,
- crypto_completion_t complete)
-{
- int ret;
-
- struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
- struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
- struct mcryptd_queue *queue =
- mcryptd_get_queue(crypto_ahash_tfm(tfm));
-
- rctx->complete = req->base.complete;
- req->base.complete = complete;
-
- ret = mcryptd_enqueue_request(queue, &req->base, rctx);
-
- return ret;
-}
-
-static void mcryptd_hash_init(struct crypto_async_request *req_async, int err)
-{
- struct mcryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
- struct crypto_ahash *child = ctx->child;
- struct ahash_request *req = ahash_request_cast(req_async);
- struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
- struct ahash_request *desc = &rctx->areq;
-
- if (unlikely(err == -EINPROGRESS))
- goto out;
-
- ahash_request_set_tfm(desc, child);
- ahash_request_set_callback(desc, CRYPTO_TFM_REQ_MAY_SLEEP,
- rctx->complete, req_async);
-
- rctx->out = req->result;
- err = crypto_ahash_init(desc);
-
-out:
- local_bh_disable();
- rctx->complete(&req->base, err);
- local_bh_enable();
-}
-
-static int mcryptd_hash_init_enqueue(struct ahash_request *req)
-{
- return mcryptd_hash_enqueue(req, mcryptd_hash_init);
-}
-
-static void mcryptd_hash_update(struct crypto_async_request *req_async, int err)
-{
- struct ahash_request *req = ahash_request_cast(req_async);
- struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
-
- if (unlikely(err == -EINPROGRESS))
- goto out;
-
- rctx->out = req->result;
- err = crypto_ahash_update(&rctx->areq);
- if (err) {
- req->base.complete = rctx->complete;
- goto out;
- }
-
- return;
-out:
- local_bh_disable();
- rctx->complete(&req->base, err);
- local_bh_enable();
-}
-
-static int mcryptd_hash_update_enqueue(struct ahash_request *req)
-{
- return mcryptd_hash_enqueue(req, mcryptd_hash_update);
-}
-
-static void mcryptd_hash_final(struct crypto_async_request *req_async, int err)
-{
- struct ahash_request *req = ahash_request_cast(req_async);
- struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
-
- if (unlikely(err == -EINPROGRESS))
- goto out;
-
- rctx->out = req->result;
- err = crypto_ahash_final(&rctx->areq);
- if (err) {
- req->base.complete = rctx->complete;
- goto out;
- }
-
- return;
-out:
- local_bh_disable();
- rctx->complete(&req->base, err);
- local_bh_enable();
-}
-
-static int mcryptd_hash_final_enqueue(struct ahash_request *req)
-{
- return mcryptd_hash_enqueue(req, mcryptd_hash_final);
-}
-
-static void mcryptd_hash_finup(struct crypto_async_request *req_async, int err)
-{
- struct ahash_request *req = ahash_request_cast(req_async);
- struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
-
- if (unlikely(err == -EINPROGRESS))
- goto out;
- rctx->out = req->result;
- err = crypto_ahash_finup(&rctx->areq);
-
- if (err) {
- req->base.complete = rctx->complete;
- goto out;
- }
-
- return;
-out:
- local_bh_disable();
- rctx->complete(&req->base, err);
- local_bh_enable();
-}
-
-static int mcryptd_hash_finup_enqueue(struct ahash_request *req)
-{
- return mcryptd_hash_enqueue(req, mcryptd_hash_finup);
-}
-
-static void mcryptd_hash_digest(struct crypto_async_request *req_async, int err)
-{
- struct mcryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
- struct crypto_ahash *child = ctx->child;
- struct ahash_request *req = ahash_request_cast(req_async);
- struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
- struct ahash_request *desc = &rctx->areq;
-
- if (unlikely(err == -EINPROGRESS))
- goto out;
-
- ahash_request_set_tfm(desc, child);
- ahash_request_set_callback(desc, CRYPTO_TFM_REQ_MAY_SLEEP,
- rctx->complete, req_async);
-
- rctx->out = req->result;
- err = crypto_ahash_init(desc) ?: crypto_ahash_finup(desc);
-
-out:
- local_bh_disable();
- rctx->complete(&req->base, err);
- local_bh_enable();
-}
-
-static int mcryptd_hash_digest_enqueue(struct ahash_request *req)
-{
- return mcryptd_hash_enqueue(req, mcryptd_hash_digest);
-}
-
-static int mcryptd_hash_export(struct ahash_request *req, void *out)
-{
- struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
-
- return crypto_ahash_export(&rctx->areq, out);
-}
-
-static int mcryptd_hash_import(struct ahash_request *req, const void *in)
-{
- struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
-
- return crypto_ahash_import(&rctx->areq, in);
-}
-
-static int mcryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
- struct mcryptd_queue *queue)
-{
- struct hashd_instance_ctx *ctx;
- struct ahash_instance *inst;
- struct hash_alg_common *halg;
- struct crypto_alg *alg;
- u32 type = 0;
- u32 mask = 0;
- int err;
-
- if (!mcryptd_check_internal(tb, &type, &mask))
- return -EINVAL;
-
- halg = ahash_attr_alg(tb[1], type, mask);
- if (IS_ERR(halg))
- return PTR_ERR(halg);
-
- alg = &halg->base;
- pr_debug("crypto: mcryptd hash alg: %s\n", alg->cra_name);
- inst = mcryptd_alloc_instance(alg, ahash_instance_headroom(),
- sizeof(*ctx));
- err = PTR_ERR(inst);
- if (IS_ERR(inst))
- goto out_put_alg;
-
- ctx = ahash_instance_ctx(inst);
- ctx->queue = queue;
-
- err = crypto_init_ahash_spawn(&ctx->spawn, halg,
- ahash_crypto_instance(inst));
- if (err)
- goto out_free_inst;
-
- inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC |
- (alg->cra_flags & (CRYPTO_ALG_INTERNAL |
- CRYPTO_ALG_OPTIONAL_KEY));
-
- inst->alg.halg.digestsize = halg->digestsize;
- inst->alg.halg.statesize = halg->statesize;
- inst->alg.halg.base.cra_ctxsize = sizeof(struct mcryptd_hash_ctx);
-
- inst->alg.halg.base.cra_init = mcryptd_hash_init_tfm;
- inst->alg.halg.base.cra_exit = mcryptd_hash_exit_tfm;
-
- inst->alg.init = mcryptd_hash_init_enqueue;
- inst->alg.update = mcryptd_hash_update_enqueue;
- inst->alg.final = mcryptd_hash_final_enqueue;
- inst->alg.finup = mcryptd_hash_finup_enqueue;
- inst->alg.export = mcryptd_hash_export;
- inst->alg.import = mcryptd_hash_import;
- if (crypto_hash_alg_has_setkey(halg))
- inst->alg.setkey = mcryptd_hash_setkey;
- inst->alg.digest = mcryptd_hash_digest_enqueue;
-
- err = ahash_register_instance(tmpl, inst);
- if (err) {
- crypto_drop_ahash(&ctx->spawn);
-out_free_inst:
- kfree(inst);
- }
-
-out_put_alg:
- crypto_mod_put(alg);
- return err;
-}
-
-static struct mcryptd_queue mqueue;
-
-static int mcryptd_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_DIGEST:
- return mcryptd_create_hash(tmpl, tb, &mqueue);
- break;
- }
-
- return -EINVAL;
-}
-
-static void mcryptd_free(struct crypto_instance *inst)
-{
- struct mcryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
- struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
-
- switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
- case CRYPTO_ALG_TYPE_AHASH:
- crypto_drop_ahash(&hctx->spawn);
- kfree(ahash_instance(inst));
- return;
- default:
- crypto_drop_spawn(&ctx->spawn);
- kfree(inst);
- }
-}
-
-static struct crypto_template mcryptd_tmpl = {
- .name = "mcryptd",
- .create = mcryptd_create,
- .free = mcryptd_free,
- .module = THIS_MODULE,
-};
-
-struct mcryptd_ahash *mcryptd_alloc_ahash(const char *alg_name,
- u32 type, u32 mask)
-{
- char mcryptd_alg_name[CRYPTO_MAX_ALG_NAME];
- struct crypto_ahash *tfm;
-
- if (snprintf(mcryptd_alg_name, CRYPTO_MAX_ALG_NAME,
- "mcryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
- return ERR_PTR(-EINVAL);
- tfm = crypto_alloc_ahash(mcryptd_alg_name, type, mask);
- if (IS_ERR(tfm))
- return ERR_CAST(tfm);
- if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
- crypto_free_ahash(tfm);
- return ERR_PTR(-EINVAL);
- }
-
- return __mcryptd_ahash_cast(tfm);
-}
-EXPORT_SYMBOL_GPL(mcryptd_alloc_ahash);
-
-struct crypto_ahash *mcryptd_ahash_child(struct mcryptd_ahash *tfm)
-{
- struct mcryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
-
- return ctx->child;
-}
-EXPORT_SYMBOL_GPL(mcryptd_ahash_child);
-
-struct ahash_request *mcryptd_ahash_desc(struct ahash_request *req)
-{
- struct mcryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
- return &rctx->areq;
-}
-EXPORT_SYMBOL_GPL(mcryptd_ahash_desc);
-
-void mcryptd_free_ahash(struct mcryptd_ahash *tfm)
-{
- crypto_free_ahash(&tfm->base);
-}
-EXPORT_SYMBOL_GPL(mcryptd_free_ahash);
-
-static int __init mcryptd_init(void)
-{
- int err, cpu;
- struct mcryptd_flush_list *flist;
-
- mcryptd_flist = alloc_percpu(struct mcryptd_flush_list);
- for_each_possible_cpu(cpu) {
- flist = per_cpu_ptr(mcryptd_flist, cpu);
- INIT_LIST_HEAD(&flist->list);
- mutex_init(&flist->lock);
- }
-
- err = mcryptd_init_queue(&mqueue, MCRYPTD_MAX_CPU_QLEN);
- if (err) {
- free_percpu(mcryptd_flist);
- return err;
- }
-
- err = crypto_register_template(&mcryptd_tmpl);
- if (err) {
- mcryptd_fini_queue(&mqueue);
- free_percpu(mcryptd_flist);
- }
-
- return err;
-}
-
-static void __exit mcryptd_exit(void)
-{
- mcryptd_fini_queue(&mqueue);
- crypto_unregister_template(&mcryptd_tmpl);
- free_percpu(mcryptd_flist);
-}
-
-subsys_initcall(mcryptd_init);
-module_exit(mcryptd_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Software async multibuffer crypto daemon");
-MODULE_ALIAS_CRYPTO("mcryptd");