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crypto: algapi - pass instance to crypto_grab_spawn()

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Currently, crypto_spawn::inst is first used temporarily to pass the
instance to crypto_grab_spawn().  Then crypto_init_spawn() overwrites it
with crypto_spawn::next, which shares the same union.  Finally,
crypto_spawn::inst is set again when the instance is registered.

Make this less convoluted by just passing the instance as an argument to
crypto_grab_spawn() instead.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2020-01-02 19:58:48 -08:00 committed by Herbert Xu
parent 73bed26f73
commit de95c95741
6 changed files with 11 additions and 20 deletions
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6
crypto/adiantum.c
View file

@ -542,9 +542,9 @@ static int adiantum_create(struct crypto_template *tmpl, struct rtattr **tb)
streamcipher_alg = crypto_spawn_skcipher_alg(&ictx->streamcipher_spawn);
/* Block cipher, e.g. "aes" */
crypto_set_spawn(&ictx->blockcipher_spawn,
skcipher_crypto_instance(inst));
err = crypto_grab_spawn(&ictx->blockcipher_spawn, blockcipher_name,
err = crypto_grab_spawn(&ictx->blockcipher_spawn,
skcipher_crypto_instance(inst),
blockcipher_name,
CRYPTO_ALG_TYPE_CIPHER, CRYPTO_ALG_TYPE_MASK);
if (err)
goto out_drop_streamcipher;

3
crypto/aead.c
View file

@ -211,9 +211,8 @@ int crypto_grab_aead(struct crypto_aead_spawn *spawn,
struct crypto_instance *inst,
const char *name, u32 type, u32 mask)
{
spawn->base.inst = inst;
spawn->base.frontend = &crypto_aead_type;
return crypto_grab_spawn(&spawn->base, name, type, mask);
return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_grab_aead);

3
crypto/akcipher.c
View file

@ -94,9 +94,8 @@ int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn,
struct crypto_instance *inst,
const char *name, u32 type, u32 mask)
{
spawn->base.inst = inst;
spawn->base.frontend = &crypto_akcipher_type;
return crypto_grab_spawn(&spawn->base, name, type, mask);
return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_grab_akcipher);

6
crypto/algapi.c
View file

@ -714,8 +714,8 @@ int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
}
EXPORT_SYMBOL_GPL(crypto_init_spawn2);
int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,
u32 type, u32 mask)
int crypto_grab_spawn(struct crypto_spawn *spawn, struct crypto_instance *inst,
const char *name, u32 type, u32 mask)
{
struct crypto_alg *alg;
int err;
@ -729,7 +729,7 @@ int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,
return PTR_ERR(alg);
spawn->dropref = true;
err = crypto_init_spawn(spawn, alg, spawn->inst, mask);
err = crypto_init_spawn(spawn, alg, inst, mask);
if (err)
crypto_mod_put(alg);
return err;

3
crypto/skcipher.c
View file

@ -750,9 +750,8 @@ int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn,
struct crypto_instance *inst,
const char *name, u32 type, u32 mask)
{
spawn->base.inst = inst;
spawn->base.frontend = &crypto_skcipher_type;
return crypto_grab_spawn(&spawn->base, name, type, mask);
return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_grab_skcipher);

10
include/crypto/algapi.h
View file

@ -116,20 +116,14 @@ int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
struct crypto_instance *inst,
const struct crypto_type *frontend);
int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,
u32 type, u32 mask);
int crypto_grab_spawn(struct crypto_spawn *spawn, struct crypto_instance *inst,
const char *name, u32 type, u32 mask);
void crypto_drop_spawn(struct crypto_spawn *spawn);
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
u32 mask);
void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
static inline void crypto_set_spawn(struct crypto_spawn *spawn,
struct crypto_instance *inst)
{
spawn->inst = inst;
}
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);