ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 12:43:29 +02:00
Code Issues Packages Projects Releases Wiki Activity

crypto: api - Add crypto_tfm_get

Browse Source 
Add a crypto_tfm_get interface to allow tfm objects to be shared.
They can still be freed in the usual way.

This should only be done with tfm objects with no keys.  You must
also not modify the tfm flags in any way once it becomes shared.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2023-04-13 14:24:15 +08:00
parent 94330fbe08
commit ae131f4970
3 changed files with 11 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
crypto/api.c
View File

@@ -408,6 +408,7 @@ struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
goto out_err;
tfm->__crt_alg = alg;
refcount_set(&tfm->refcnt, 1);
err = crypto_init_ops(tfm, type, mask);
if (err)
@@ -507,6 +508,7 @@ void *crypto_create_tfm_node(struct crypto_alg *alg,
tfm = (struct crypto_tfm *)(mem + tfmsize);
tfm->__crt_alg = alg;
tfm->node = node;
refcount_set(&tfm->refcnt, 1);
err = frontend->init_tfm(tfm);
if (err)
@@ -619,6 +621,8 @@ void crypto_destroy_tfm(void *mem, struct crypto_tfm *tfm)
if (IS_ERR_OR_NULL(mem))
return;
if (!refcount_dec_and_test(&tfm->refcnt))
return;
alg = tfm->__crt_alg;
if (!tfm->exit && alg->cra_exit)