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authorHerbert Xu <herbert@gondor.apana.org.au>2009-07-08 17:53:16 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2009-07-08 18:58:29 +0800
commitd06854f0243d91badabaab14503f7f3bb770061d (patch)
tree252603fecb02a8cc4933b0e582444ff7cb504018
parent942969992d86330c9700e2cd9afe8a6bea42df78 (diff)
crypto: api - Add crypto_attr_alg2 helper
This patch adds the helper crypto_attr_alg2 which is similar to crypto_attr_alg but takes an extra frontend argument. This is intended to be used by new style algorithm types such as shash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--crypto/algapi.c8
-rw-r--r--crypto/api.c31
-rw-r--r--crypto/internal.h3
-rw-r--r--include/crypto/algapi.h11
4 files changed, 40 insertions, 13 deletions
diff --git a/crypto/algapi.c b/crypto/algapi.c
index 17a5fff8f777..2154815201a7 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -644,7 +644,9 @@ const char *crypto_attr_alg_name(struct rtattr *rta)
}
EXPORT_SYMBOL_GPL(crypto_attr_alg_name);
-struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask)
+struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
+ const struct crypto_type *frontend,
+ u32 type, u32 mask)
{
const char *name;
int err;
@@ -654,9 +656,9 @@ struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask)
if (IS_ERR(name))
return ERR_PTR(err);
- return crypto_alg_mod_lookup(name, type, mask);
+ return crypto_find_alg(name, frontend, type, mask);
}
-EXPORT_SYMBOL_GPL(crypto_attr_alg);
+EXPORT_SYMBOL_GPL(crypto_attr_alg2);
int crypto_attr_u32(struct rtattr *rta, u32 *num)
{
diff --git a/crypto/api.c b/crypto/api.c
index d5944f92b416..ba81221b3bef 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -503,6 +503,27 @@ out:
}
EXPORT_SYMBOL_GPL(crypto_create_tfm);
+struct crypto_alg *crypto_find_alg(const char *alg_name,
+ const struct crypto_type *frontend,
+ u32 type, u32 mask)
+{
+ struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask) =
+ crypto_alg_mod_lookup;
+
+ if (frontend) {
+ type &= frontend->maskclear;
+ mask &= frontend->maskclear;
+ type |= frontend->type;
+ mask |= frontend->maskset;
+
+ if (frontend->lookup)
+ lookup = frontend->lookup;
+ }
+
+ return lookup(alg_name, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_find_alg);
+
/*
* crypto_alloc_tfm - Locate algorithm and allocate transform
* @alg_name: Name of algorithm
@@ -526,21 +547,13 @@ EXPORT_SYMBOL_GPL(crypto_create_tfm);
void *crypto_alloc_tfm(const char *alg_name,
const struct crypto_type *frontend, u32 type, u32 mask)
{
- struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
void *tfm;
int err;
- type &= frontend->maskclear;
- mask &= frontend->maskclear;
- type |= frontend->type;
- mask |= frontend->maskset;
-
- lookup = frontend->lookup ?: crypto_alg_mod_lookup;
-
for (;;) {
struct crypto_alg *alg;
- alg = lookup(alg_name, type, mask);
+ alg = crypto_find_alg(alg_name, frontend, type, mask);
if (IS_ERR(alg)) {
err = PTR_ERR(alg);
goto err;
diff --git a/crypto/internal.h b/crypto/internal.h
index 95baaea21fbc..7efa4d0533ff 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -106,6 +106,9 @@ struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
u32 mask);
void *crypto_create_tfm(struct crypto_alg *alg,
const struct crypto_type *frontend);
+struct crypto_alg *crypto_find_alg(const char *alg_name,
+ const struct crypto_type *frontend,
+ u32 type, u32 mask);
void *crypto_alloc_tfm(const char *alg_name,
const struct crypto_type *frontend, u32 type, u32 mask);
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index c9bff92a9e0e..1d15a926041e 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -136,7 +136,16 @@ static inline void crypto_set_spawn(struct crypto_spawn *spawn,
struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
int crypto_check_attr_type(struct rtattr **tb, u32 type);
const char *crypto_attr_alg_name(struct rtattr *rta);
-struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask);
+struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
+ const struct crypto_type *frontend,
+ u32 type, u32 mask);
+
+static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
+ u32 type, u32 mask)
+{
+ return crypto_attr_alg2(rta, NULL, type, mask);
+}
+
int crypto_attr_u32(struct rtattr *rta, u32 *num);
void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
unsigned int head);

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