Add a cra_type->destroy hook so that resources can be freed after
the last user of a registered algorithm is gone.
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
---
crypto/api.c | 10 ++++++++++
crypto/internal.h | 6 ++++--
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/crypto/api.c b/crypto/api.c
index c2c4eb14ef95..91957bb52f3f 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -707,5 +707,15 @@ void crypto_req_done(void *data, int err)
}
EXPORT_SYMBOL_GPL(crypto_req_done);
+void crypto_destroy_alg(struct crypto_alg *alg)
+{
+ if (alg->cra_type && alg->cra_type->destroy)
+ alg->cra_type->destroy(alg);
+
+ if (alg->cra_destroy)
+ alg->cra_destroy(alg);
+}
+EXPORT_SYMBOL_GPL(crypto_destroy_alg);
+
MODULE_DESCRIPTION("Cryptographic core API");
MODULE_LICENSE("GPL");
diff --git a/crypto/internal.h b/crypto/internal.h
index 08d43b40e7db..11567ea24fc3 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -40,6 +40,7 @@ struct crypto_type {
void (*show)(struct seq_file *m, struct crypto_alg *alg);
int (*report)(struct sk_buff *skb, struct crypto_alg *alg);
void (*free)(struct crypto_instance *inst);
+ void (*destroy)(struct crypto_alg *alg);
unsigned int type;
unsigned int maskclear;
@@ -127,6 +128,7 @@ void *crypto_create_tfm_node(struct crypto_alg *alg,
const struct crypto_type *frontend, int node);
void *crypto_clone_tfm(const struct crypto_type *frontend,
struct crypto_tfm *otfm);
+void crypto_destroy_alg(struct crypto_alg *alg);
static inline void *crypto_create_tfm(struct crypto_alg *alg,
const struct crypto_type *frontend)
@@ -163,8 +165,8 @@ static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
static inline void crypto_alg_put(struct crypto_alg *alg)
{
- if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
- alg->cra_destroy(alg);
+ if (refcount_dec_and_test(&alg->cra_refcnt))
+ crypto_destroy_alg(alg);
}
static inline int crypto_tmpl_get(struct crypto_template *tmpl)
--
2.39.5
