[CRYPTO] api: Add crypto_attr_alg_name
This patch adds a new helper crypto_attr_alg_name which is basically the
first half of crypto_attr_alg. That is, it returns an algorithm name
parameter as a string without looking it up. The caller can then look it
up immediately or defer it until later.
Signed-off-by: Herbert Xu <[email protected]>
---
crypto/algapi.c | 18 ++++++++++++++++--
include/crypto/algapi.h | 1 +
2 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/crypto/algapi.c b/crypto/algapi.c
index 08eca6d..e65cb50 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -472,7 +472,7 @@ int crypto_check_attr_type(struct rtattr **tb, u32 type)
}
EXPORT_SYMBOL_GPL(crypto_check_attr_type);
-struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask)
+const char *crypto_attr_alg_name(struct rtattr *rta)
{
struct crypto_attr_alg *alga;
@@ -486,7 +486,21 @@ struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask)
alga = RTA_DATA(rta);
alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0;
- return crypto_alg_mod_lookup(alga->name, type, mask);
+ return alga->name;
+}
+EXPORT_SYMBOL_GPL(crypto_attr_alg_name);
+
+struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask)
+{
+ const char *name;
+ int err;
+
+ name = crypto_attr_alg_name(rta);
+ err = PTR_ERR(name);
+ if (IS_ERR(name))
+ return ERR_PTR(err);
+
+ return crypto_alg_mod_lookup(name, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_attr_alg);
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index 2cdb227..726a765 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -113,6 +113,7 @@ struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
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);
int crypto_attr_u32(struct rtattr *rta, u32 *num);
struct crypto_instance *crypto_alloc_instance(const char *name,