diff options
| author | Gilad Ben-Yossef <gilad@benyossef.com> | 2017-10-18 08:00:38 +0100 |
|---|---|---|
| committer | Mircea Pop <mircea.pop@nxp.com> | 2019-05-14 09:54:34 +0200 |
| commit | 73d2e52ac3cc69063fc3ee5660f858ffbf3a6e05 (patch) | |
| tree | 80204f82a0daa647bf549cdcd95bf10d6e623e01 /include | |
| parent | 76b9d1aa87a754ac35a88767709a6ac71e3c3c4c (diff) | |
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>
(cherry picked from commit ada69a1639eca54ff74d839a6513c43db8d57d70)
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/crypto.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/include/linux/crypto.h b/include/linux/crypto.h index de96913306cb..5e14fac088d5 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -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 @@ -481,6 +482,45 @@ struct crypto_alg { } 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. */ int crypto_register_alg(struct crypto_alg *alg); |