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[CRYPTO] api: Added spawns

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Spawns lock a specific crypto algorithm in place.  They can then be used
with crypto_spawn_tfm to allocate a tfm for that algorithm.  When the base
algorithm of a spawn is deregistered, all its spawns will be automatically
removed.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2006-09-21 11:39:29 +10:00
parent 492e2b63eb
commit 6bfd48096f
6 changed files with 280 additions and 53 deletions
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19
crypto/cryptomgr.c
View file

@ -17,6 +17,7 @@
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/rtnetlink.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/workqueue.h>
@ -44,21 +45,25 @@ static void cryptomgr_probe(void *data)
struct cryptomgr_param *param = data;
struct crypto_template *tmpl;
struct crypto_instance *inst;
int err;
tmpl = crypto_lookup_template(param->template);
if (!tmpl)
goto err;
inst = tmpl->alloc(&param->alg, sizeof(param->alg));
if (IS_ERR(inst))
goto err;
else if ((err = crypto_register_instance(tmpl, inst))) {
tmpl->free(inst);
goto err;
}
do {
inst = tmpl->alloc(&param->alg, sizeof(param->alg));
if (IS_ERR(inst))
err = PTR_ERR(inst);
else if ((err = crypto_register_instance(tmpl, inst)))
tmpl->free(inst);
} while (err == -EAGAIN && !signal_pending(current));
crypto_tmpl_put(tmpl);
if (err)
goto err;
out:
kfree(param);
return;