383 lines
11 KiB
C
383 lines
11 KiB
C
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/*
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* QEMU Cryptodev backend for QEMU cipher APIs
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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 "qapi/error.h"
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#include "qapi/qmp/qerror.h"
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#include "qemu/error-report.h"
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#include "hw/virtio/vhost-user.h"
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#include "standard-headers/linux/virtio_crypto.h"
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#include "sysemu/cryptodev-vhost.h"
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#include "chardev/char-fe.h"
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#include "sysemu/cryptodev-vhost-user.h"
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/**
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* @TYPE_CRYPTODEV_BACKEND_VHOST_USER:
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* name of backend that uses vhost user server
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*/
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#define TYPE_CRYPTODEV_BACKEND_VHOST_USER "cryptodev-vhost-user"
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#define CRYPTODEV_BACKEND_VHOST_USER(obj) \
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OBJECT_CHECK(CryptoDevBackendVhostUser, \
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(obj), TYPE_CRYPTODEV_BACKEND_VHOST_USER)
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typedef struct CryptoDevBackendVhostUser {
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CryptoDevBackend parent_obj;
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VhostUserState vhost_user;
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CharBackend chr;
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char *chr_name;
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bool opened;
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CryptoDevBackendVhost *vhost_crypto[MAX_CRYPTO_QUEUE_NUM];
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} CryptoDevBackendVhostUser;
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static int
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cryptodev_vhost_user_running(
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CryptoDevBackendVhost *crypto)
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{
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return crypto ? 1 : 0;
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}
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CryptoDevBackendVhost *
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cryptodev_vhost_user_get_vhost(
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CryptoDevBackendClient *cc,
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CryptoDevBackend *b,
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uint16_t queue)
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{
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CryptoDevBackendVhostUser *s =
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CRYPTODEV_BACKEND_VHOST_USER(b);
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assert(cc->type == CRYPTODEV_BACKEND_TYPE_VHOST_USER);
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assert(queue < MAX_CRYPTO_QUEUE_NUM);
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return s->vhost_crypto[queue];
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}
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static void cryptodev_vhost_user_stop(int queues,
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CryptoDevBackendVhostUser *s)
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{
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size_t i;
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for (i = 0; i < queues; i++) {
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if (!cryptodev_vhost_user_running(s->vhost_crypto[i])) {
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continue;
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}
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cryptodev_vhost_cleanup(s->vhost_crypto[i]);
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s->vhost_crypto[i] = NULL;
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}
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}
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static int
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cryptodev_vhost_user_start(int queues,
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CryptoDevBackendVhostUser *s)
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{
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CryptoDevBackendVhostOptions options;
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CryptoDevBackend *b = CRYPTODEV_BACKEND(s);
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int max_queues;
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size_t i;
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for (i = 0; i < queues; i++) {
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if (cryptodev_vhost_user_running(s->vhost_crypto[i])) {
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continue;
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}
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options.opaque = &s->vhost_user;
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options.backend_type = VHOST_BACKEND_TYPE_USER;
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options.cc = b->conf.peers.ccs[i];
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s->vhost_crypto[i] = cryptodev_vhost_init(&options);
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if (!s->vhost_crypto[i]) {
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error_report("failed to init vhost_crypto for queue %zu", i);
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goto err;
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}
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if (i == 0) {
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max_queues =
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cryptodev_vhost_get_max_queues(s->vhost_crypto[i]);
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if (queues > max_queues) {
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error_report("you are asking more queues than supported: %d",
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max_queues);
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goto err;
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}
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}
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}
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return 0;
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err:
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cryptodev_vhost_user_stop(i + 1, s);
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return -1;
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}
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static Chardev *
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cryptodev_vhost_claim_chardev(CryptoDevBackendVhostUser *s,
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Error **errp)
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{
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Chardev *chr;
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if (s->chr_name == NULL) {
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
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"chardev", "a valid character device");
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return NULL;
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}
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chr = qemu_chr_find(s->chr_name);
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if (chr == NULL) {
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error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
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"Device '%s' not found", s->chr_name);
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return NULL;
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}
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return chr;
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}
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static void cryptodev_vhost_user_event(void *opaque, QEMUChrEvent event)
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{
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CryptoDevBackendVhostUser *s = opaque;
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CryptoDevBackend *b = CRYPTODEV_BACKEND(s);
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int queues = b->conf.peers.queues;
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assert(queues < MAX_CRYPTO_QUEUE_NUM);
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switch (event) {
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case CHR_EVENT_OPENED:
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if (cryptodev_vhost_user_start(queues, s) < 0) {
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exit(1);
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}
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b->ready = true;
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break;
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case CHR_EVENT_CLOSED:
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b->ready = false;
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cryptodev_vhost_user_stop(queues, s);
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break;
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case CHR_EVENT_BREAK:
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case CHR_EVENT_MUX_IN:
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case CHR_EVENT_MUX_OUT:
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/* Ignore */
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break;
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}
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}
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static void cryptodev_vhost_user_init(
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CryptoDevBackend *backend, Error **errp)
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{
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int queues = backend->conf.peers.queues;
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size_t i;
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Error *local_err = NULL;
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Chardev *chr;
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CryptoDevBackendClient *cc;
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CryptoDevBackendVhostUser *s =
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CRYPTODEV_BACKEND_VHOST_USER(backend);
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chr = cryptodev_vhost_claim_chardev(s, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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return;
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}
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s->opened = true;
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for (i = 0; i < queues; i++) {
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cc = cryptodev_backend_new_client(
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"cryptodev-vhost-user", NULL);
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cc->info_str = g_strdup_printf("cryptodev-vhost-user%zu to %s ",
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i, chr->label);
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cc->queue_index = i;
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cc->type = CRYPTODEV_BACKEND_TYPE_VHOST_USER;
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backend->conf.peers.ccs[i] = cc;
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if (i == 0) {
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if (!qemu_chr_fe_init(&s->chr, chr, errp)) {
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return;
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}
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}
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}
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if (!vhost_user_init(&s->vhost_user, &s->chr, errp)) {
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return;
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}
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qemu_chr_fe_set_handlers(&s->chr, NULL, NULL,
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cryptodev_vhost_user_event, NULL, s, NULL, true);
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backend->conf.crypto_services =
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1u << VIRTIO_CRYPTO_SERVICE_CIPHER |
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1u << VIRTIO_CRYPTO_SERVICE_HASH |
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1u << VIRTIO_CRYPTO_SERVICE_MAC;
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backend->conf.cipher_algo_l = 1u << VIRTIO_CRYPTO_CIPHER_AES_CBC;
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backend->conf.hash_algo = 1u << VIRTIO_CRYPTO_HASH_SHA1;
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backend->conf.max_size = UINT64_MAX;
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backend->conf.max_cipher_key_len = VHOST_USER_MAX_CIPHER_KEY_LEN;
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backend->conf.max_auth_key_len = VHOST_USER_MAX_AUTH_KEY_LEN;
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}
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static int64_t cryptodev_vhost_user_sym_create_session(
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CryptoDevBackend *backend,
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CryptoDevBackendSymSessionInfo *sess_info,
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uint32_t queue_index, Error **errp)
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{
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CryptoDevBackendClient *cc =
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backend->conf.peers.ccs[queue_index];
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CryptoDevBackendVhost *vhost_crypto;
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uint64_t session_id = 0;
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int ret;
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vhost_crypto = cryptodev_vhost_user_get_vhost(cc, backend, queue_index);
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if (vhost_crypto) {
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struct vhost_dev *dev = &(vhost_crypto->dev);
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ret = dev->vhost_ops->vhost_crypto_create_session(dev,
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sess_info,
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&session_id);
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if (ret < 0) {
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return -1;
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} else {
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return session_id;
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}
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}
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return -1;
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}
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static int cryptodev_vhost_user_sym_close_session(
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CryptoDevBackend *backend,
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uint64_t session_id,
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uint32_t queue_index, Error **errp)
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{
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CryptoDevBackendClient *cc =
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backend->conf.peers.ccs[queue_index];
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CryptoDevBackendVhost *vhost_crypto;
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int ret;
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vhost_crypto = cryptodev_vhost_user_get_vhost(cc, backend, queue_index);
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if (vhost_crypto) {
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struct vhost_dev *dev = &(vhost_crypto->dev);
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ret = dev->vhost_ops->vhost_crypto_close_session(dev,
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session_id);
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if (ret < 0) {
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return -1;
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} else {
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return 0;
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}
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}
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return -1;
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}
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static void cryptodev_vhost_user_cleanup(
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CryptoDevBackend *backend,
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Error **errp)
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{
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CryptoDevBackendVhostUser *s =
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CRYPTODEV_BACKEND_VHOST_USER(backend);
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size_t i;
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int queues = backend->conf.peers.queues;
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CryptoDevBackendClient *cc;
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cryptodev_vhost_user_stop(queues, s);
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for (i = 0; i < queues; i++) {
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cc = backend->conf.peers.ccs[i];
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if (cc) {
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cryptodev_backend_free_client(cc);
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backend->conf.peers.ccs[i] = NULL;
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}
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}
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vhost_user_cleanup(&s->vhost_user);
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}
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static void cryptodev_vhost_user_set_chardev(Object *obj,
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const char *value, Error **errp)
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{
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CryptoDevBackendVhostUser *s =
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CRYPTODEV_BACKEND_VHOST_USER(obj);
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if (s->opened) {
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error_setg(errp, QERR_PERMISSION_DENIED);
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} else {
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g_free(s->chr_name);
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s->chr_name = g_strdup(value);
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}
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}
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static char *
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cryptodev_vhost_user_get_chardev(Object *obj, Error **errp)
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{
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CryptoDevBackendVhostUser *s =
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CRYPTODEV_BACKEND_VHOST_USER(obj);
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Chardev *chr = qemu_chr_fe_get_driver(&s->chr);
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if (chr && chr->label) {
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return g_strdup(chr->label);
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}
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return NULL;
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}
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static void cryptodev_vhost_user_instance_int(Object *obj)
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{
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object_property_add_str(obj, "chardev",
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cryptodev_vhost_user_get_chardev,
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cryptodev_vhost_user_set_chardev);
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}
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static void cryptodev_vhost_user_finalize(Object *obj)
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{
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CryptoDevBackendVhostUser *s =
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CRYPTODEV_BACKEND_VHOST_USER(obj);
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qemu_chr_fe_deinit(&s->chr, false);
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g_free(s->chr_name);
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}
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static void
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cryptodev_vhost_user_class_init(ObjectClass *oc, void *data)
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{
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CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc);
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bc->init = cryptodev_vhost_user_init;
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bc->cleanup = cryptodev_vhost_user_cleanup;
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bc->create_session = cryptodev_vhost_user_sym_create_session;
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bc->close_session = cryptodev_vhost_user_sym_close_session;
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bc->do_sym_op = NULL;
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}
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static const TypeInfo cryptodev_vhost_user_info = {
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.name = TYPE_CRYPTODEV_BACKEND_VHOST_USER,
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.parent = TYPE_CRYPTODEV_BACKEND,
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.class_init = cryptodev_vhost_user_class_init,
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.instance_init = cryptodev_vhost_user_instance_int,
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.instance_finalize = cryptodev_vhost_user_finalize,
|
||
|
|
.instance_size = sizeof(CryptoDevBackendVhostUser),
|
||
|
|
};
|
||
|
|
|
||
|
|
static void
|
||
|
|
cryptodev_vhost_user_register_types(void)
|
||
|
|
{
|
||
|
|
type_register_static(&cryptodev_vhost_user_info);
|
||
|
|
}
|
||
|
|
|
||
|
|
type_init(cryptodev_vhost_user_register_types);
|