Re: [PATCH v5 05/19] crypto: introduce crypto wait for async op
On Tue, Aug 15, 2017 at 5:23 AM, Jonathan Cameron wrote: > On Mon, 14 Aug 2017 18:21:15 +0300 > Gilad Ben-Yossef wrote: > >> 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. > > Trivial observation. Shouldn't have this bonus blank line inserted here. > >> #endif /* _LINUX_CRYPTO_H */ >> > Indeed. Will be fixed. Thanks, Gilad -- Gilad Ben-Yossef Chief Coffee Drinker "If you take a class in large-scale robotics, can you end up in a situation where the homework eats your dog?" -- Jean-Baptiste Queru -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH v5 05/19] crypto: introduce crypto wait for async op
On Mon, 14 Aug 2017 18:21:15 +0300
Gilad Ben-Yossef wrote:
> 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
> CC: Eric Biggers
One really trivial point inline I happened to notice.
> ---
> crypto/api.c | 13 +
> include/linux/crypto.h | 41 +
> 2 files changed, 54 insertions(+)
>
> diff --git a/crypto/api.c b/crypto/api.c
> index 941cd4c..2a2479d 100644
> --- a/crypto/api.c
> +++ b/crypto/api.c
> @@ -24,6 +24,7 @@
> #include
> #include
> #include
> +#include
> #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");
> diff --git a/include/linux/crypto.h b/include/linux/crypto.h
> index 84da997..bb00186 100644
> --- a/include/linux/crypto.h
> +++ b/include/linux/crypto.h
> @@ -24,6 +24,7 @@
> #include
> #include
> #include
> +#include
>
> /*
> * Autoloaded crypto modules should only use a prefixed name to avoid
> allowing
> @@ -468,6 +469,45 @@ 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);
> @@ -1604,5 +1644,6 @@ static inline int crypto_comp_decompress(struct
> crypto_comp *tfm,
> src, slen, dst, dlen);
> }
>
> +
Trivial observation. Shouldn't have this bonus blank line inserted here.
> #endif /* _LINUX_CRYPTO_H */
>
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[PATCH v5 05/19] 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
CC: Eric Biggers
---
crypto/api.c | 13 +
include/linux/crypto.h | 41 +
2 files changed, 54 insertions(+)
diff --git a/crypto/api.c b/crypto/api.c
index 941cd4c..2a2479d 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -24,6 +24,7 @@
#include
#include
#include
+#include
#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");
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 84da997..bb00186 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -24,6 +24,7 @@
#include
#include
#include
+#include
/*
* Autoloaded crypto modules should only use a prefixed name to avoid allowing
@@ -468,6 +469,45 @@ 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);
@@ -1604,5 +1644,6 @@ static inline int crypto_comp_decompress(struct
crypto_comp *tfm,
src, slen, dst, dlen);
}
+
#endif /* _LINUX_CRYPTO_H */
--
2.1.4
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