brain-hackers_pepepper-mirror/linux-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/linux-brain.git synced 2024-06-09 23:36:23 +09:00
Code Issues Projects Releases Wiki Activity

crypto: engine - Handle the kthread worker using the new API

Browse Source 
Use the new API to create and destroy the crypto engine kthread
worker. The API hides some implementation details.

In particular, kthread_create_worker() allocates and initializes
struct kthread_worker. It runs the kthread the right way
and stores task_struct into the worker structure.

kthread_destroy_worker() flushes all pending works, stops
the kthread and frees the structure.

This patch does not change the existing behavior except for
dynamically allocating struct kthread_worker and storing
only the pointer of this structure.

It is compile tested only because I did not find an easy
way how to run the code. Well, it should be pretty safe
given the nature of the change.

Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Petr Mladek 2016-10-19 13:54:30 +02:00 committed by Herbert Xu
parent 103600ab96
commit c4ca2b0b25
2 changed files with 13 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
crypto/crypto_engine.c
View File

@ -47,7 +47,7 @@ static void crypto_pump_requests(struct crypto_engine *engine,
/* If another context is idling then defer */
if (engine->idling) {
kthread_queue_work(&engine->kworker, &engine->pump_requests);
kthread_queue_work(engine->kworker, &engine->pump_requests);
goto out;
}
@ -58,7 +58,7 @@ static void crypto_pump_requests(struct crypto_engine *engine,
/* Only do teardown in the thread */
if (!in_kthread) {
kthread_queue_work(&engine->kworker,
kthread_queue_work(engine->kworker,
&engine->pump_requests);
goto out;
}
@ -189,7 +189,7 @@ int crypto_transfer_cipher_request(struct crypto_engine *engine,
ret = ablkcipher_enqueue_request(&engine->queue, req);
if (!engine->busy && need_pump)
kthread_queue_work(&engine->kworker, &engine->pump_requests);
kthread_queue_work(engine->kworker, &engine->pump_requests);
spin_unlock_irqrestore(&engine->queue_lock, flags);
return ret;
@ -231,7 +231,7 @@ int crypto_transfer_hash_request(struct crypto_engine *engine,
ret = ahash_enqueue_request(&engine->queue, req);
if (!engine->busy && need_pump)
kthread_queue_work(&engine->kworker, &engine->pump_requests);
kthread_queue_work(engine->kworker, &engine->pump_requests);
spin_unlock_irqrestore(&engine->queue_lock, flags);
return ret;
@ -284,7 +284,7 @@ void crypto_finalize_cipher_request(struct crypto_engine *engine,
req->base.complete(&req->base, err);
kthread_queue_work(&engine->kworker, &engine->pump_requests);
kthread_queue_work(engine->kworker, &engine->pump_requests);
}
EXPORT_SYMBOL_GPL(crypto_finalize_cipher_request);
@ -321,7 +321,7 @@ void crypto_finalize_hash_request(struct crypto_engine *engine,
req->base.complete(&req->base, err);
kthread_queue_work(&engine->kworker, &engine->pump_requests);
kthread_queue_work(engine->kworker, &engine->pump_requests);
}
EXPORT_SYMBOL_GPL(crypto_finalize_hash_request);
@ -345,7 +345,7 @@ int crypto_engine_start(struct crypto_engine *engine)
engine->running = true;
spin_unlock_irqrestore(&engine->queue_lock, flags);
kthread_queue_work(&engine->kworker, &engine->pump_requests);
kthread_queue_work(engine->kworker, &engine->pump_requests);
return 0;
}
@ -422,11 +422,8 @@ struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)
crypto_init_queue(&engine->queue, CRYPTO_ENGINE_MAX_QLEN);
spin_lock_init(&engine->queue_lock);
kthread_init_worker(&engine->kworker);
engine->kworker_task = kthread_run(kthread_worker_fn,
&engine->kworker, "%s",
engine->name);
if (IS_ERR(engine->kworker_task)) {
engine->kworker = kthread_create_worker(0, "%s", engine->name);
if (IS_ERR(engine->kworker)) {
dev_err(dev, "failed to create crypto request pump task\n");
return NULL;
}
@ -434,7 +431,7 @@ struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)
if (engine->rt) {
dev_info(dev, "will run requests pump with realtime priority\n");
sched_setscheduler(engine->kworker_task, SCHED_FIFO, &param);
sched_setscheduler(engine->kworker->task, SCHED_FIFO, &param);
}
return engine;
@ -455,8 +452,7 @@ int crypto_engine_exit(struct crypto_engine *engine)
if (ret)
return ret;
kthread_flush_worker(&engine->kworker);
kthread_stop(engine->kworker_task);
kthread_destroy_worker(engine->kworker);
return 0;
}

6
include/crypto/engine.h
View File

@ -43,8 +43,7 @@
* @prepare_hash_request: do some prepare if need before handle the current request
* @unprepare_hash_request: undo any work done by prepare_hash_request()
* @hash_one_request: do hash for current request
* @kworker: thread struct for request pump
* @kworker_task: pointer to task for request pump kworker thread
* @kworker: kthread worker struct for request pump
* @pump_requests: work struct for scheduling work to the request pump
* @priv_data: the engine private data
* @cur_req: the current request which is on processing
@ -78,8 +77,7 @@ struct crypto_engine {
int (*hash_one_request)(struct crypto_engine *engine,
struct ahash_request *req);
struct kthread_worker kworker;
struct task_struct *kworker_task;
struct kthread_worker *kworker;
struct kthread_work pump_requests;
void *priv_data;