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crypto: api - Add new style spawn support

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This patch modifies the spawn infrastructure to support new style
algorithms like shash.  In particular, this means storing the
frontend type in the spawn and using crypto_create_tfm to allocate
the tfm.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2009-07-08 15:55:52 +08:00
parent 2e4fddd8e4
commit 97eedce1a6
2 changed files with 58 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
crypto/algapi.c
View File

@ -488,6 +488,23 @@ int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
} }
EXPORT_SYMBOL_GPL(crypto_init_spawn); EXPORT_SYMBOL_GPL(crypto_init_spawn);
int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
struct crypto_instance *inst,
const struct crypto_type *frontend)
{
int err = -EINVAL;
if (frontend && (alg->cra_flags ^ frontend->type) & frontend->maskset)
goto out;
spawn->frontend = frontend;
err = crypto_init_spawn(spawn, alg, inst, frontend->maskset);
out:
return err;
}
EXPORT_SYMBOL_GPL(crypto_init_spawn2);
void crypto_drop_spawn(struct crypto_spawn *spawn) void crypto_drop_spawn(struct crypto_spawn *spawn)
{ {
down_write(&crypto_alg_sem); down_write(&crypto_alg_sem);
@ -496,12 +513,10 @@ void crypto_drop_spawn(struct crypto_spawn *spawn)
} }
EXPORT_SYMBOL_GPL(crypto_drop_spawn); EXPORT_SYMBOL_GPL(crypto_drop_spawn);
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn)
u32 mask)
{ {
struct crypto_alg *alg; struct crypto_alg *alg;
struct crypto_alg *alg2; struct crypto_alg *alg2;
struct crypto_tfm *tfm;
down_read(&crypto_alg_sem); down_read(&crypto_alg_sem);
alg = spawn->alg; alg = spawn->alg;
@ -516,6 +531,19 @@ struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
return ERR_PTR(-EAGAIN); return ERR_PTR(-EAGAIN);
} }
return alg;
}
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
u32 mask)
{
struct crypto_alg *alg;
struct crypto_tfm *tfm;
alg = crypto_spawn_alg(spawn);
if (IS_ERR(alg))
return ERR_CAST(alg);
tfm = ERR_PTR(-EINVAL); tfm = ERR_PTR(-EINVAL);
if (unlikely((alg->cra_flags ^ type) & mask)) if (unlikely((alg->cra_flags ^ type) & mask))
goto out_put_alg; goto out_put_alg;
@ -532,6 +560,27 @@ out_put_alg:
} }
EXPORT_SYMBOL_GPL(crypto_spawn_tfm); EXPORT_SYMBOL_GPL(crypto_spawn_tfm);
void *crypto_spawn_tfm2(struct crypto_spawn *spawn)
{
struct crypto_alg *alg;
struct crypto_tfm *tfm;
alg = crypto_spawn_alg(spawn);
if (IS_ERR(alg))
return ERR_CAST(alg);
tfm = crypto_create_tfm(alg, spawn->frontend);
if (IS_ERR(tfm))
goto out_put_alg;
return tfm;
out_put_alg:
crypto_mod_put(alg);
return tfm;
}
EXPORT_SYMBOL_GPL(crypto_spawn_tfm2);
int crypto_register_notifier(struct notifier_block *nb) int crypto_register_notifier(struct notifier_block *nb)
{ {
return blocking_notifier_chain_register(&crypto_chain, nb); return blocking_notifier_chain_register(&crypto_chain, nb);

6
include/crypto/algapi.h
View File

@ -61,6 +61,7 @@ struct crypto_spawn {
struct list_head list; struct list_head list;
struct crypto_alg *alg; struct crypto_alg *alg;
struct crypto_instance *inst; struct crypto_instance *inst;
const struct crypto_type *frontend;
u32 mask; u32 mask;
}; };
@ -117,9 +118,14 @@ struct crypto_template *crypto_lookup_template(const char *name);
int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
struct crypto_instance *inst, u32 mask); struct crypto_instance *inst, u32 mask);
int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
struct crypto_instance *inst,
const struct crypto_type *frontend);
void crypto_drop_spawn(struct crypto_spawn *spawn); void crypto_drop_spawn(struct crypto_spawn *spawn);
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
u32 mask); u32 mask);
void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
static inline void crypto_set_spawn(struct crypto_spawn *spawn, static inline void crypto_set_spawn(struct crypto_spawn *spawn,
struct crypto_instance *inst) struct crypto_instance *inst)