[CRYPTO] api: Added event notification
[linux-2.6.git] / crypto / algapi.c
index 232b37d..f0df85f 100644 (file)
 
 static LIST_HEAD(crypto_template_list);
 
+void crypto_larval_error(const char *name)
+{
+       struct crypto_alg *alg;
+
+       down_read(&crypto_alg_sem);
+       alg = __crypto_alg_lookup(name);
+       up_read(&crypto_alg_sem);
+
+       if (alg) {
+               if (crypto_is_larval(alg)) {
+                       struct crypto_larval *larval = (void *)alg;
+                       complete(&larval->completion);
+               }
+               crypto_mod_put(alg);
+       }
+}
+EXPORT_SYMBOL_GPL(crypto_larval_error);
+
 static inline int crypto_set_driver_name(struct crypto_alg *alg)
 {
        static const char suffix[] = "-generic";
@@ -60,14 +78,27 @@ static int __crypto_register_alg(struct crypto_alg *alg)
        struct crypto_alg *q;
        int ret = -EEXIST;
 
+       atomic_set(&alg->cra_refcnt, 1);
        list_for_each_entry(q, &crypto_alg_list, cra_list) {
                if (q == alg)
                        goto out;
+               if (crypto_is_larval(q) &&
+                   (!strcmp(alg->cra_name, q->cra_name) ||
+                    !strcmp(alg->cra_driver_name, q->cra_name))) {
+                       struct crypto_larval *larval = (void *)q;
+
+                       if (!crypto_mod_get(alg))
+                               continue;
+                       larval->adult = alg;
+                       complete(&larval->completion);
+               }
        }
        
        list_add(&alg->cra_list, &crypto_alg_list);
-       atomic_set(&alg->cra_refcnt, 1);
+
+       crypto_notify(CRYPTO_MSG_ALG_REGISTER, alg);
        ret = 0;
+
 out:   
        return ret;
 }
@@ -97,6 +128,7 @@ int crypto_unregister_alg(struct crypto_alg *alg)
                list_del_init(&alg->cra_list);
                ret = 0;
        }
+       crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, alg);
        up_write(&crypto_alg_sem);
 
        if (ret)
@@ -123,6 +155,7 @@ int crypto_register_template(struct crypto_template *tmpl)
        }
 
        list_add(&tmpl->list, &crypto_template_list);
+       crypto_notify(CRYPTO_MSG_TMPL_REGISTER, tmpl);
        err = 0;
 out:
        up_write(&crypto_alg_sem);
@@ -145,8 +178,11 @@ void crypto_unregister_template(struct crypto_template *tmpl)
        hlist_for_each_entry(inst, p, list, list) {
                BUG_ON(list_empty(&inst->alg.cra_list));
                list_del_init(&inst->alg.cra_list);
+               crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, &inst->alg);
        }
 
+       crypto_notify(CRYPTO_MSG_TMPL_UNREGISTER, tmpl);
+
        up_write(&crypto_alg_sem);
 
        hlist_for_each_entry_safe(inst, p, n, list, list) {
@@ -212,6 +248,18 @@ err:
 }
 EXPORT_SYMBOL_GPL(crypto_register_instance);
 
+int crypto_register_notifier(struct notifier_block *nb)
+{
+       return blocking_notifier_chain_register(&crypto_chain, nb);
+}
+EXPORT_SYMBOL_GPL(crypto_register_notifier);
+
+int crypto_unregister_notifier(struct notifier_block *nb)
+{
+       return blocking_notifier_chain_unregister(&crypto_chain, nb);
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_notifier);
+
 static int __init crypto_algapi_init(void)
 {
        crypto_init_proc();