[CRYPTO] api: Added cra_init/cra_exit
This patch adds the hooks cra_init/cra_exit which are called during a tfm's
construction and destruction respectively. This will be used by the instances
to allocate child tfm's.
For now this lets us get rid of the coa_init/coa_exit functions which are
used for exactly that purpose (unlike the dia_init function which is called
for each transaction).
In fact the coa_exit path is currently buggy as it may get called twice
when an error is encountered during initialisation.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/api.c b/crypto/api.c
index 80bba63..8145310 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -188,13 +188,16 @@
if (crypto_init_flags(tfm, flags))
goto out_free_tfm;
- if (crypto_init_ops(tfm)) {
- crypto_exit_ops(tfm);
+ if (crypto_init_ops(tfm))
goto out_free_tfm;
- }
+
+ if (alg->cra_init && alg->cra_init(tfm))
+ goto cra_init_failed;
goto out;
+cra_init_failed:
+ crypto_exit_ops(tfm);
out_free_tfm:
kfree(tfm);
tfm = NULL;
@@ -215,6 +218,8 @@
alg = tfm->__crt_alg;
size = sizeof(*tfm) + alg->cra_ctxsize;
+ if (alg->cra_exit)
+ alg->cra_exit(tfm);
crypto_exit_ops(tfm);
crypto_alg_put(alg);
memset(tfm, 0, size);
diff --git a/crypto/compress.c b/crypto/compress.c
index f3e0733..eca182a 100644
--- a/crypto/compress.c
+++ b/crypto/compress.c
@@ -41,21 +41,14 @@
int crypto_init_compress_ops(struct crypto_tfm *tfm)
{
- int ret = 0;
struct compress_tfm *ops = &tfm->crt_compress;
-
- ret = tfm->__crt_alg->cra_compress.coa_init(tfm);
- if (ret)
- goto out;
ops->cot_compress = crypto_compress;
ops->cot_decompress = crypto_decompress;
-out:
- return ret;
+ return 0;
}
void crypto_exit_compress_ops(struct crypto_tfm *tfm)
{
- tfm->__crt_alg->cra_compress.coa_exit(tfm);
}
diff --git a/crypto/deflate.c b/crypto/deflate.c
index 5dd2404..6588bbf 100644
--- a/crypto/deflate.c
+++ b/crypto/deflate.c
@@ -201,9 +201,9 @@
.cra_ctxsize = sizeof(struct deflate_ctx),
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(alg.cra_list),
+ .cra_init = deflate_init,
+ .cra_exit = deflate_exit,
.cra_u = { .compress = {
- .coa_init = deflate_init,
- .coa_exit = deflate_exit,
.coa_compress = deflate_compress,
.coa_decompress = deflate_decompress } }
};
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index ef91880..6c013c8 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -109,8 +109,6 @@
};
struct compress_alg {
- int (*coa_init)(struct crypto_tfm *tfm);
- void (*coa_exit)(struct crypto_tfm *tfm);
int (*coa_compress)(struct crypto_tfm *tfm, const u8 *src,
unsigned int slen, u8 *dst, unsigned int *dlen);
int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src,
@@ -138,6 +136,9 @@
struct digest_alg digest;
struct compress_alg compress;
} cra_u;
+
+ int (*cra_init)(struct crypto_tfm *tfm);
+ void (*cra_exit)(struct crypto_tfm *tfm);
struct module *cra_module;
};