1 files changed, 137 insertions, 32 deletions

diff --git a/crypto/algapi.c b/crypto/algapi.c
index f7d2185b2c8f..f137a432061f 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -84,36 +84,47 @@ static void crypto_destroy_instance(struct crypto_alg *alg)
 	crypto_tmpl_put(tmpl);
 }
 
-static void crypto_remove_spawns(struct list_head *spawns,
-				 struct list_head *list)
+static void crypto_remove_spawn(struct crypto_spawn *spawn,
+				struct list_head *list,
+				struct list_head *secondary_spawns)
 {
-	struct crypto_spawn *spawn, *n;
+	struct crypto_instance *inst = spawn->inst;
+	struct crypto_template *tmpl = inst->tmpl;
 
-	list_for_each_entry_safe(spawn, n, spawns, list) {
-		struct crypto_instance *inst = spawn->inst;
-		struct crypto_template *tmpl = inst->tmpl;
+	list_del_init(&spawn->list);
+	spawn->alg = NULL;
 
-		list_del_init(&spawn->list);
-		spawn->alg = NULL;
+	if (crypto_is_dead(&inst->alg))
+		return;
 
-		if (crypto_is_dead(&inst->alg))
-			continue;
+	inst->alg.cra_flags |= CRYPTO_ALG_DEAD;
+	if (!tmpl || !crypto_tmpl_get(tmpl))
+		return;
 
-		inst->alg.cra_flags |= CRYPTO_ALG_DEAD;
-		if (!tmpl || !crypto_tmpl_get(tmpl))
+	crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, &inst->alg);
+	list_move(&inst->alg.cra_list, list);
+	hlist_del(&inst->list);
+	inst->alg.cra_destroy = crypto_destroy_instance;
+
+	list_splice(&inst->alg.cra_users, secondary_spawns);
+}
+
+static void crypto_remove_spawns(struct list_head *spawns,
+				 struct list_head *list, u32 new_type)
+{
+	struct crypto_spawn *spawn, *n;
+	LIST_HEAD(secondary_spawns);
+
+	list_for_each_entry_safe(spawn, n, spawns, list) {
+		if ((spawn->alg->cra_flags ^ new_type) & spawn->mask)
 			continue;
 
-		crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, &inst->alg);
-		list_move(&inst->alg.cra_list, list);
-		hlist_del(&inst->list);
-		inst->alg.cra_destroy = crypto_destroy_instance;
+		crypto_remove_spawn(spawn, list, &secondary_spawns);
+	}
 
-		if (!list_empty(&inst->alg.cra_users)) {
-			if (&n->list == spawns)
-				n = list_entry(inst->alg.cra_users.next,
-					       typeof(*n), list);
-			__list_splice(&inst->alg.cra_users, spawns->prev);
-		}
+	while (!list_empty(&secondary_spawns)) {
+		list_for_each_entry_safe(spawn, n, &secondary_spawns, list)
+			crypto_remove_spawn(spawn, list, &secondary_spawns);
 	}
 }
 
@@ -164,7 +175,7 @@ static int __crypto_register_alg(struct crypto_alg *alg,
 		    q->cra_priority > alg->cra_priority)
 			continue;
 
-		crypto_remove_spawns(&q->cra_users, list);
+		crypto_remove_spawns(&q->cra_users, list, alg->cra_flags);
 	}
 	
 	list_add(&alg->cra_list, &crypto_alg_list);
@@ -214,7 +225,7 @@ static int crypto_remove_alg(struct crypto_alg *alg, struct list_head *list)
 
 	crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, alg);
 	list_del_init(&alg->cra_list);
-	crypto_remove_spawns(&alg->cra_users, list);
+	crypto_remove_spawns(&alg->cra_users, list, alg->cra_flags);
 
 	return 0;
 }
@@ -351,11 +362,12 @@ err:
 EXPORT_SYMBOL_GPL(crypto_register_instance);
 
 int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
-		      struct crypto_instance *inst)
+		      struct crypto_instance *inst, u32 mask)
 {
 	int err = -EAGAIN;
 
 	spawn->inst = inst;
+	spawn->mask = mask;
 
 	down_write(&crypto_alg_sem);
 	if (!crypto_is_moribund(alg)) {
@@ -425,15 +437,45 @@ int crypto_unregister_notifier(struct notifier_block *nb)
 }
 EXPORT_SYMBOL_GPL(crypto_unregister_notifier);
 
-struct crypto_alg *crypto_get_attr_alg(void *param, unsigned int len,
-				       u32 type, u32 mask)
+struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb)
+{
+	struct rtattr *rta = tb[CRYPTOA_TYPE - 1];
+	struct crypto_attr_type *algt;
+
+	if (!rta)
+		return ERR_PTR(-ENOENT);
+	if (RTA_PAYLOAD(rta) < sizeof(*algt))
+		return ERR_PTR(-EINVAL);
+
+	algt = RTA_DATA(rta);
+
+	return algt;
+}
+EXPORT_SYMBOL_GPL(crypto_get_attr_type);
+
+int crypto_check_attr_type(struct rtattr **tb, u32 type)
 {
-	struct rtattr *rta = param;
+	struct crypto_attr_type *algt;
+
+	algt = crypto_get_attr_type(tb);
+	if (IS_ERR(algt))
+		return PTR_ERR(algt);
+
+	if ((algt->type ^ type) & algt->mask)
+		return -EINVAL;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_check_attr_type);
+
+struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, u32 type, u32 mask)
+{
+	struct rtattr *rta = tb[CRYPTOA_ALG - 1];
 	struct crypto_attr_alg *alga;
 
-	if (!RTA_OK(rta, len))
-		return ERR_PTR(-EBADR);
-	if (rta->rta_type != CRYPTOA_ALG || RTA_PAYLOAD(rta) < sizeof(*alga))
+	if (!rta)
+		return ERR_PTR(-ENOENT);
+	if (RTA_PAYLOAD(rta) < sizeof(*alga))
 		return ERR_PTR(-EINVAL);
 
 	alga = RTA_DATA(rta);
@@ -464,7 +506,8 @@ struct crypto_instance *crypto_alloc_instance(const char *name,
 		goto err_free_inst;
 
 	spawn = crypto_instance_ctx(inst);
-	err = crypto_init_spawn(spawn, alg, inst);
+	err = crypto_init_spawn(spawn, alg, inst,
+				CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
 
 	if (err)
 		goto err_free_inst;
@@ -477,6 +520,68 @@ err_free_inst:
 }
 EXPORT_SYMBOL_GPL(crypto_alloc_instance);
 
+void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen)
+{
+	INIT_LIST_HEAD(&queue->list);
+	queue->backlog = &queue->list;
+	queue->qlen = 0;
+	queue->max_qlen = max_qlen;
+}
+EXPORT_SYMBOL_GPL(crypto_init_queue);
+
+int crypto_enqueue_request(struct crypto_queue *queue,
+			   struct crypto_async_request *request)
+{
+	int err = -EINPROGRESS;
+
+	if (unlikely(queue->qlen >= queue->max_qlen)) {
+		err = -EBUSY;
+		if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+			goto out;
+		if (queue->backlog == &queue->list)
+			queue->backlog = &request->list;
+	}
+
+	queue->qlen++;
+	list_add_tail(&request->list, &queue->list);
+
+out:
+	return err;
+}
+EXPORT_SYMBOL_GPL(crypto_enqueue_request);
+
+struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue)
+{
+	struct list_head *request;
+
+	if (unlikely(!queue->qlen))
+		return NULL;
+
+	queue->qlen--;
+
+	if (queue->backlog != &queue->list)
+		queue->backlog = queue->backlog->next;
+
+	request = queue->list.next;
+	list_del(request);
+
+	return list_entry(request, struct crypto_async_request, list);
+}
+EXPORT_SYMBOL_GPL(crypto_dequeue_request);
+
+int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm)
+{
+	struct crypto_async_request *req;
+
+	list_for_each_entry(req, &queue->list, list) {
+		if (req->tfm == tfm)
+			return 1;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_tfm_in_queue);
+
 static int __init crypto_algapi_init(void)
 {
 	crypto_init_proc();