cryptodev: introduce cryptodev backend interface
cryptodev backend interface is used to realize the active work for virtual crypto device. This patch only add the framework, doesn't include specific operations. Signed-off-by: Gonglei <arei.gonglei@huawei.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Gonglei
Michael S. Tsirkin
parent
2bd3c31a60
commit
d0ee7a135f
@ -9,3 +9,5 @@ common-obj-$(CONFIG_TPM) += tpm.o
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common-obj-y += hostmem.o hostmem-ram.o
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common-obj-y += hostmem.o hostmem-ram.o
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common-obj-$(CONFIG_LINUX) += hostmem-file.o
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common-obj-$(CONFIG_LINUX) += hostmem-file.o
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common-obj-y += cryptodev.o
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176
backends/cryptodev.c
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176
backends/cryptodev.c
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@ -0,0 +1,176 @@
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/*
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* QEMU Crypto Device Implementation
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*
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* Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
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*
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* Authors:
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* Gonglei <arei.gonglei@huawei.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "qemu/osdep.h"
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#include "sysemu/cryptodev.h"
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#include "hw/boards.h"
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#include "qapi/error.h"
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#include "qapi/visitor.h"
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#include "qapi-types.h"
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#include "qapi-visit.h"
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#include "qemu/config-file.h"
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#include "qom/object_interfaces.h"
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static QTAILQ_HEAD(, CryptoDevBackendClient) crypto_clients;
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CryptoDevBackendClient *
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cryptodev_backend_new_client(const char *model,
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const char *name)
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{
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CryptoDevBackendClient *cc;
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cc = g_malloc0(sizeof(CryptoDevBackendClient));
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cc->model = g_strdup(model);
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if (name) {
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cc->name = g_strdup(name);
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}
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QTAILQ_INSERT_TAIL(&crypto_clients, cc, next);
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return cc;
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}
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void cryptodev_backend_free_client(
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CryptoDevBackendClient *cc)
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{
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QTAILQ_REMOVE(&crypto_clients, cc, next);
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g_free(cc->name);
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g_free(cc->model);
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g_free(cc->info_str);
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g_free(cc);
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}
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void cryptodev_backend_cleanup(
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CryptoDevBackend *backend,
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Error **errp)
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{
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CryptoDevBackendClass *bc =
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CRYPTODEV_BACKEND_GET_CLASS(backend);
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if (bc->cleanup) {
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bc->cleanup(backend, errp);
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}
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backend->ready = false;
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}
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static void
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cryptodev_backend_get_queues(Object *obj, Visitor *v, const char *name,
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void *opaque, Error **errp)
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{
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CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
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uint32_t value = backend->conf.peers.queues;
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visit_type_uint32(v, name, &value, errp);
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}
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static void
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cryptodev_backend_set_queues(Object *obj, Visitor *v, const char *name,
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void *opaque, Error **errp)
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{
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CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
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Error *local_err = NULL;
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uint32_t value;
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visit_type_uint32(v, name, &value, &local_err);
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if (local_err) {
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goto out;
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}
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if (!value) {
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error_setg(&local_err, "Property '%s.%s' doesn't take value '%"
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PRIu32 "'", object_get_typename(obj), name, value);
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goto out;
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}
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backend->conf.peers.queues = value;
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out:
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error_propagate(errp, local_err);
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}
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static void
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cryptodev_backend_complete(UserCreatable *uc, Error **errp)
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{
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CryptoDevBackend *backend = CRYPTODEV_BACKEND(uc);
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CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_GET_CLASS(uc);
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Error *local_err = NULL;
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if (bc->init) {
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bc->init(backend, &local_err);
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if (local_err) {
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goto out;
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}
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}
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backend->ready = true;
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return;
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out:
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backend->ready = false;
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error_propagate(errp, local_err);
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}
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static void cryptodev_backend_instance_init(Object *obj)
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{
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object_property_add(obj, "queues", "int",
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cryptodev_backend_get_queues,
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cryptodev_backend_set_queues,
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NULL, NULL, NULL);
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/* Initialize devices' queues property to 1 */
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object_property_set_int(obj, 1, "queues", NULL);
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}
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static void cryptodev_backend_finalize(Object *obj)
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{
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}
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static void
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cryptodev_backend_class_init(ObjectClass *oc, void *data)
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{
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UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
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ucc->complete = cryptodev_backend_complete;
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QTAILQ_INIT(&crypto_clients);
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}
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static const TypeInfo cryptodev_backend_info = {
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.name = TYPE_CRYPTODEV_BACKEND,
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.parent = TYPE_OBJECT,
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.instance_size = sizeof(CryptoDevBackend),
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.instance_init = cryptodev_backend_instance_init,
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.instance_finalize = cryptodev_backend_finalize,
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.class_size = sizeof(CryptoDevBackendClass),
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.class_init = cryptodev_backend_class_init,
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.interfaces = (InterfaceInfo[]) {
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{ TYPE_USER_CREATABLE },
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{ }
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}
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};
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static void
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cryptodev_backend_register_types(void)
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{
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type_register_static(&cryptodev_backend_info);
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}
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type_init(cryptodev_backend_register_types);
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148
include/sysemu/cryptodev.h
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148
include/sysemu/cryptodev.h
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/*
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* QEMU Crypto Device Implementation
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*
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* Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
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*
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* Authors:
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* Gonglei <arei.gonglei@huawei.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef CRYPTODEV_H
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#define CRYPTODEV_H
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#include "qom/object.h"
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#include "qemu-common.h"
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/**
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* CryptoDevBackend:
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*
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* The CryptoDevBackend object is an interface
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* for different cryptodev backends, which provides crypto
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* operation wrapper.
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*
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*/
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#define TYPE_CRYPTODEV_BACKEND "cryptodev-backend"
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#define CRYPTODEV_BACKEND(obj) \
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OBJECT_CHECK(CryptoDevBackend, \
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(obj), TYPE_CRYPTODEV_BACKEND)
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#define CRYPTODEV_BACKEND_GET_CLASS(obj) \
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OBJECT_GET_CLASS(CryptoDevBackendClass, \
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(obj), TYPE_CRYPTODEV_BACKEND)
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#define CRYPTODEV_BACKEND_CLASS(klass) \
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OBJECT_CLASS_CHECK(CryptoDevBackendClass, \
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(klass), TYPE_CRYPTODEV_BACKEND)
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#define MAX_CRYPTO_QUEUE_NUM 64
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typedef struct CryptoDevBackendConf CryptoDevBackendConf;
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typedef struct CryptoDevBackendPeers CryptoDevBackendPeers;
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typedef struct CryptoDevBackendClient
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CryptoDevBackendClient;
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typedef struct CryptoDevBackend CryptoDevBackend;
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typedef struct CryptoDevBackendClass {
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ObjectClass parent_class;
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void (*init)(CryptoDevBackend *backend, Error **errp);
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void (*cleanup)(CryptoDevBackend *backend, Error **errp);
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} CryptoDevBackendClass;
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struct CryptoDevBackendClient {
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char *model;
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char *name;
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char *info_str;
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unsigned int queue_index;
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QTAILQ_ENTRY(CryptoDevBackendClient) next;
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};
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struct CryptoDevBackendPeers {
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CryptoDevBackendClient *ccs[MAX_CRYPTO_QUEUE_NUM];
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uint32_t queues;
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};
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struct CryptoDevBackendConf {
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CryptoDevBackendPeers peers;
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/* Supported service mask */
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uint32_t crypto_services;
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/* Detailed algorithms mask */
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uint32_t cipher_algo_l;
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uint32_t cipher_algo_h;
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uint32_t hash_algo;
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uint32_t mac_algo_l;
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uint32_t mac_algo_h;
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uint32_t aead_algo;
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/* Maximum length of cipher key */
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uint32_t max_cipher_key_len;
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/* Maximum length of authenticated key */
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uint32_t max_auth_key_len;
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/* Maximum size of each crypto request's content */
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uint64_t max_size;
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};
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struct CryptoDevBackend {
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Object parent_obj;
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bool ready;
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CryptoDevBackendConf conf;
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};
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/**
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* cryptodev_backend_new_client:
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* @model: the cryptodev backend model
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* @name: the cryptodev backend name, can be NULL
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*
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* Creates a new cryptodev backend client object
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* with the @name in the model @model.
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*
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* The returned object must be released with
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* cryptodev_backend_free_client() when no
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* longer required
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*
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* Returns: a new cryptodev backend client object
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*/
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CryptoDevBackendClient *
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cryptodev_backend_new_client(const char *model,
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const char *name);
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/**
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* cryptodev_backend_free_client:
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* @cc: the cryptodev backend client object
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*
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* Release the memory associated with @cc that
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* was previously allocated by cryptodev_backend_new_client()
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*/
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void cryptodev_backend_free_client(
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CryptoDevBackendClient *cc);
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/**
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* cryptodev_backend_cleanup:
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* @backend: the cryptodev backend object
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* @errp: pointer to a NULL-initialized error object
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*
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* Clean the resouce associated with @backend that realizaed
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* by the specific backend's init() callback
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*/
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void cryptodev_backend_cleanup(
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CryptoDevBackend *backend,
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Error **errp);
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#endif /* CRYPTODEV_H */
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