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cryptodev: introduce cryptodev backend interface

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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 2016-10-28 16:33:20 +08:00 committed by Michael S. Tsirkin
parent 2bd3c31a60
commit d0ee7a135f
3 changed files with 326 additions and 0 deletions
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2
backends/Makefile.objs
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@ -9,3 +9,5 @@ common-obj-$(CONFIG_TPM) += tpm.o
common-obj-y += hostmem.o hostmem-ram.o
common-obj-$(CONFIG_LINUX) += hostmem-file.o
common-obj-y += cryptodev.o

176
backends/cryptodev.c Normal file
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@ -0,0 +1,176 @@
/*
* QEMU Crypto Device Implementation
*
* Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
*
* Authors:
* Gonglei <arei.gonglei@huawei.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "sysemu/cryptodev.h"
#include "hw/boards.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "qapi-types.h"
#include "qapi-visit.h"
#include "qemu/config-file.h"
#include "qom/object_interfaces.h"
static QTAILQ_HEAD(, CryptoDevBackendClient) crypto_clients;
CryptoDevBackendClient *
cryptodev_backend_new_client(const char *model,
const char *name)
{
CryptoDevBackendClient *cc;
cc = g_malloc0(sizeof(CryptoDevBackendClient));
cc->model = g_strdup(model);
if (name) {
cc->name = g_strdup(name);
}
QTAILQ_INSERT_TAIL(&crypto_clients, cc, next);
return cc;
}
void cryptodev_backend_free_client(
CryptoDevBackendClient *cc)
{
QTAILQ_REMOVE(&crypto_clients, cc, next);
g_free(cc->name);
g_free(cc->model);
g_free(cc->info_str);
g_free(cc);
}
void cryptodev_backend_cleanup(
CryptoDevBackend *backend,
Error **errp)
{
CryptoDevBackendClass *bc =
CRYPTODEV_BACKEND_GET_CLASS(backend);
if (bc->cleanup) {
bc->cleanup(backend, errp);
}
backend->ready = false;
}
static void
cryptodev_backend_get_queues(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
uint32_t value = backend->conf.peers.queues;
visit_type_uint32(v, name, &value, errp);
}
static void
cryptodev_backend_set_queues(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
Error *local_err = NULL;
uint32_t value;
visit_type_uint32(v, name, &value, &local_err);
if (local_err) {
goto out;
}
if (!value) {
error_setg(&local_err, "Property '%s.%s' doesn't take value '%"
PRIu32 "'", object_get_typename(obj), name, value);
goto out;
}
backend->conf.peers.queues = value;
out:
error_propagate(errp, local_err);
}
static void
cryptodev_backend_complete(UserCreatable *uc, Error **errp)
{
CryptoDevBackend *backend = CRYPTODEV_BACKEND(uc);
CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_GET_CLASS(uc);
Error *local_err = NULL;
if (bc->init) {
bc->init(backend, &local_err);
if (local_err) {
goto out;
}
}
backend->ready = true;
return;
out:
backend->ready = false;
error_propagate(errp, local_err);
}
static void cryptodev_backend_instance_init(Object *obj)
{
object_property_add(obj, "queues", "int",
cryptodev_backend_get_queues,
cryptodev_backend_set_queues,
NULL, NULL, NULL);
/* Initialize devices' queues property to 1 */
object_property_set_int(obj, 1, "queues", NULL);
}
static void cryptodev_backend_finalize(Object *obj)
{
}
static void
cryptodev_backend_class_init(ObjectClass *oc, void *data)
{
UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
ucc->complete = cryptodev_backend_complete;
QTAILQ_INIT(&crypto_clients);
}
static const TypeInfo cryptodev_backend_info = {
.name = TYPE_CRYPTODEV_BACKEND,
.parent = TYPE_OBJECT,
.instance_size = sizeof(CryptoDevBackend),
.instance_init = cryptodev_backend_instance_init,
.instance_finalize = cryptodev_backend_finalize,
.class_size = sizeof(CryptoDevBackendClass),
.class_init = cryptodev_backend_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
}
};
static void
cryptodev_backend_register_types(void)
{
type_register_static(&cryptodev_backend_info);
}
type_init(cryptodev_backend_register_types);

148
include/sysemu/cryptodev.h Normal file
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@ -0,0 +1,148 @@
/*
* QEMU Crypto Device Implementation
*
* Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
*
* Authors:
* Gonglei <arei.gonglei@huawei.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef CRYPTODEV_H
#define CRYPTODEV_H
#include "qom/object.h"
#include "qemu-common.h"
/**
* CryptoDevBackend:
*
* The CryptoDevBackend object is an interface
* for different cryptodev backends, which provides crypto
* operation wrapper.
*
*/
#define TYPE_CRYPTODEV_BACKEND "cryptodev-backend"
#define CRYPTODEV_BACKEND(obj) \
OBJECT_CHECK(CryptoDevBackend, \
(obj), TYPE_CRYPTODEV_BACKEND)
#define CRYPTODEV_BACKEND_GET_CLASS(obj) \
OBJECT_GET_CLASS(CryptoDevBackendClass, \
(obj), TYPE_CRYPTODEV_BACKEND)
#define CRYPTODEV_BACKEND_CLASS(klass) \
OBJECT_CLASS_CHECK(CryptoDevBackendClass, \
(klass), TYPE_CRYPTODEV_BACKEND)
#define MAX_CRYPTO_QUEUE_NUM 64
typedef struct CryptoDevBackendConf CryptoDevBackendConf;
typedef struct CryptoDevBackendPeers CryptoDevBackendPeers;
typedef struct CryptoDevBackendClient
CryptoDevBackendClient;
typedef struct CryptoDevBackend CryptoDevBackend;
typedef struct CryptoDevBackendClass {
ObjectClass parent_class;
void (*init)(CryptoDevBackend *backend, Error **errp);
void (*cleanup)(CryptoDevBackend *backend, Error **errp);
} CryptoDevBackendClass;
struct CryptoDevBackendClient {
char *model;
char *name;
char *info_str;
unsigned int queue_index;
QTAILQ_ENTRY(CryptoDevBackendClient) next;
};
struct CryptoDevBackendPeers {
CryptoDevBackendClient *ccs[MAX_CRYPTO_QUEUE_NUM];
uint32_t queues;
};
struct CryptoDevBackendConf {
CryptoDevBackendPeers peers;
/* Supported service mask */
uint32_t crypto_services;
/* Detailed algorithms mask */
uint32_t cipher_algo_l;
uint32_t cipher_algo_h;
uint32_t hash_algo;
uint32_t mac_algo_l;
uint32_t mac_algo_h;
uint32_t aead_algo;
/* Maximum length of cipher key */
uint32_t max_cipher_key_len;
/* Maximum length of authenticated key */
uint32_t max_auth_key_len;
/* Maximum size of each crypto request's content */
uint64_t max_size;
};
struct CryptoDevBackend {
Object parent_obj;
bool ready;
CryptoDevBackendConf conf;
};
/**
* cryptodev_backend_new_client:
* @model: the cryptodev backend model
* @name: the cryptodev backend name, can be NULL
*
* Creates a new cryptodev backend client object
* with the @name in the model @model.
*
* The returned object must be released with
* cryptodev_backend_free_client() when no
* longer required
*
* Returns: a new cryptodev backend client object
*/
CryptoDevBackendClient *
cryptodev_backend_new_client(const char *model,
const char *name);
/**
* cryptodev_backend_free_client:
* @cc: the cryptodev backend client object
*
* Release the memory associated with @cc that
* was previously allocated by cryptodev_backend_new_client()
*/
void cryptodev_backend_free_client(
CryptoDevBackendClient *cc);
/**
* cryptodev_backend_cleanup:
* @backend: the cryptodev backend object
* @errp: pointer to a NULL-initialized error object
*
* Clean the resouce associated with @backend that realizaed
* by the specific backend's init() callback
*/
void cryptodev_backend_cleanup(
CryptoDevBackend *backend,
Error **errp);
#endif /* CRYPTODEV_H */