mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-09 08:57:33 +00:00
crypto: introduce crypto wait for async op
Invoking a possibly async. crypto op and waiting for completion while correctly handling backlog processing is a common task in the crypto API implementation and outside users of it. This patch adds a generic implementation for doing so in preparation for using it across the board instead of hand rolled versions. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> CC: Eric Biggers <ebiggers3@gmail.com> CC: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
parent
3d549e325e
commit
ada69a1639
13
crypto/api.c
13
crypto/api.c
@ -24,6 +24,7 @@
|
||||
#include <linux/sched/signal.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/completion.h>
|
||||
#include "internal.h"
|
||||
|
||||
LIST_HEAD(crypto_alg_list);
|
||||
@ -595,5 +596,17 @@ int crypto_has_alg(const char *name, u32 type, u32 mask)
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(crypto_has_alg);
|
||||
|
||||
void crypto_req_done(struct crypto_async_request *req, int err)
|
||||
{
|
||||
struct crypto_wait *wait = req->data;
|
||||
|
||||
if (err == -EINPROGRESS)
|
||||
return;
|
||||
|
||||
wait->err = err;
|
||||
complete(&wait->completion);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(crypto_req_done);
|
||||
|
||||
MODULE_DESCRIPTION("Cryptographic core API");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
@ -24,6 +24,7 @@
|
||||
#include <linux/slab.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include <linux/completion.h>
|
||||
|
||||
/*
|
||||
* Autoloaded crypto modules should only use a prefixed name to avoid allowing
|
||||
@ -467,6 +468,45 @@ struct crypto_alg {
|
||||
struct module *cra_module;
|
||||
} CRYPTO_MINALIGN_ATTR;
|
||||
|
||||
/*
|
||||
* A helper struct for waiting for completion of async crypto ops
|
||||
*/
|
||||
struct crypto_wait {
|
||||
struct completion completion;
|
||||
int err;
|
||||
};
|
||||
|
||||
/*
|
||||
* Macro for declaring a crypto op async wait object on stack
|
||||
*/
|
||||
#define DECLARE_CRYPTO_WAIT(_wait) \
|
||||
struct crypto_wait _wait = { \
|
||||
COMPLETION_INITIALIZER_ONSTACK((_wait).completion), 0 }
|
||||
|
||||
/*
|
||||
* Async ops completion helper functioons
|
||||
*/
|
||||
void crypto_req_done(struct crypto_async_request *req, int err);
|
||||
|
||||
static inline int crypto_wait_req(int err, struct crypto_wait *wait)
|
||||
{
|
||||
switch (err) {
|
||||
case -EINPROGRESS:
|
||||
case -EBUSY:
|
||||
wait_for_completion(&wait->completion);
|
||||
reinit_completion(&wait->completion);
|
||||
err = wait->err;
|
||||
break;
|
||||
};
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static inline void crypto_init_wait(struct crypto_wait *wait)
|
||||
{
|
||||
init_completion(&wait->completion);
|
||||
}
|
||||
|
||||
/*
|
||||
* Algorithm registration interface.
|
||||
*/
|
||||
|
Loading…
Reference in New Issue
Block a user