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crypto: api - Add cra_type->destroy hook

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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@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2025-03-09 10:43:12 +08:00
parent 01894c8488
commit 3d6979bf3b
2 changed files with 14 additions and 2 deletions
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10
crypto/api.c
View file

@ -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");

6
crypto/internal.h
View file

@ -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)