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https://gitlab.com/qemu-project/qemu
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![zhenwei pi](/assets/img/avatar_default.png)
Generally guest side should discover which services the device is
able to offer, then do requests on device.
However it's also possible to break this rule in a guest. Handle
unexpected request here to avoid NULL pointer dereference.
Fixes: e7a775fd
('cryptodev: Account statistics')
Cc: Gonglei <arei.gonglei@huawei.com>
Cc: Mauro Matteo Cascella <mcascell@redhat.com>
Cc: Xiao Lei <nop.leixiao@gmail.com>
Cc: Yongkang Jia <kangel@zju.edu.cn>
Reported-by: Yiming Tao <taoym@zju.edu.cn>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20230803024314.29962-3-pizhenwei@bytedance.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
647 lines
20 KiB
C
647 lines
20 KiB
C
/*
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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 2.1 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 "sysemu/stats.h"
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#include "qapi/error.h"
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#include "qapi/qapi-commands-cryptodev.h"
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#include "qapi/qapi-types-stats.h"
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#include "qapi/visitor.h"
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#include "qemu/config-file.h"
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#include "qemu/error-report.h"
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#include "qemu/main-loop.h"
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#include "qom/object_interfaces.h"
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#include "hw/virtio/virtio-crypto.h"
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#define SYM_ENCRYPT_OPS_STR "sym-encrypt-ops"
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#define SYM_DECRYPT_OPS_STR "sym-decrypt-ops"
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#define SYM_ENCRYPT_BYTES_STR "sym-encrypt-bytes"
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#define SYM_DECRYPT_BYTES_STR "sym-decrypt-bytes"
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#define ASYM_ENCRYPT_OPS_STR "asym-encrypt-ops"
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#define ASYM_DECRYPT_OPS_STR "asym-decrypt-ops"
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#define ASYM_SIGN_OPS_STR "asym-sign-ops"
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#define ASYM_VERIFY_OPS_STR "asym-verify-ops"
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#define ASYM_ENCRYPT_BYTES_STR "asym-encrypt-bytes"
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#define ASYM_DECRYPT_BYTES_STR "asym-decrypt-bytes"
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#define ASYM_SIGN_BYTES_STR "asym-sign-bytes"
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#define ASYM_VERIFY_BYTES_STR "asym-verify-bytes"
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typedef struct StatsArgs {
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union StatsResultsType {
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StatsResultList **stats;
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StatsSchemaList **schema;
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} result;
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strList *names;
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Error **errp;
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} StatsArgs;
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static QTAILQ_HEAD(, CryptoDevBackendClient) crypto_clients;
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static int qmp_query_cryptodev_foreach(Object *obj, void *data)
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{
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CryptoDevBackend *backend;
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QCryptodevInfoList **infolist = data;
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uint32_t services, i;
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if (!object_dynamic_cast(obj, TYPE_CRYPTODEV_BACKEND)) {
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return 0;
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}
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QCryptodevInfo *info = g_new0(QCryptodevInfo, 1);
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info->id = g_strdup(object_get_canonical_path_component(obj));
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backend = CRYPTODEV_BACKEND(obj);
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services = backend->conf.crypto_services;
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for (i = 0; i < QCRYPTODEV_BACKEND_SERVICE__MAX; i++) {
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if (services & (1 << i)) {
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QAPI_LIST_PREPEND(info->service, i);
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}
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}
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for (i = 0; i < backend->conf.peers.queues; i++) {
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CryptoDevBackendClient *cc = backend->conf.peers.ccs[i];
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QCryptodevBackendClient *client = g_new0(QCryptodevBackendClient, 1);
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client->queue = cc->queue_index;
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client->type = cc->type;
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QAPI_LIST_PREPEND(info->client, client);
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}
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QAPI_LIST_PREPEND(*infolist, info);
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return 0;
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}
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QCryptodevInfoList *qmp_query_cryptodev(Error **errp)
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{
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QCryptodevInfoList *list = NULL;
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Object *objs = container_get(object_get_root(), "/objects");
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object_child_foreach(objs, qmp_query_cryptodev_foreach, &list);
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return list;
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}
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CryptoDevBackendClient *cryptodev_backend_new_client(void)
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{
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CryptoDevBackendClient *cc;
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cc = g_new0(CryptoDevBackendClient, 1);
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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->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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g_free(backend->sym_stat);
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g_free(backend->asym_stat);
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}
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int cryptodev_backend_create_session(
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CryptoDevBackend *backend,
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CryptoDevBackendSessionInfo *sess_info,
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uint32_t queue_index,
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CryptoDevCompletionFunc cb,
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void *opaque)
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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->create_session) {
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return bc->create_session(backend, sess_info, queue_index, cb, opaque);
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}
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return -VIRTIO_CRYPTO_NOTSUPP;
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}
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int cryptodev_backend_close_session(
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CryptoDevBackend *backend,
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uint64_t session_id,
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uint32_t queue_index,
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CryptoDevCompletionFunc cb,
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void *opaque)
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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->close_session) {
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return bc->close_session(backend, session_id, queue_index, cb, opaque);
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}
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return -VIRTIO_CRYPTO_NOTSUPP;
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}
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static int cryptodev_backend_operation(
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CryptoDevBackend *backend,
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CryptoDevBackendOpInfo *op_info)
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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->do_op) {
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return bc->do_op(backend, op_info);
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}
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return -VIRTIO_CRYPTO_NOTSUPP;
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}
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static int cryptodev_backend_account(CryptoDevBackend *backend,
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CryptoDevBackendOpInfo *op_info)
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{
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enum QCryptodevBackendAlgType algtype = op_info->algtype;
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int len;
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if (algtype == QCRYPTODEV_BACKEND_ALG_ASYM) {
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CryptoDevBackendAsymOpInfo *asym_op_info = op_info->u.asym_op_info;
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len = asym_op_info->src_len;
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if (unlikely(!backend->asym_stat)) {
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error_report("cryptodev: Unexpected asym operation");
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return -VIRTIO_CRYPTO_NOTSUPP;
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}
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switch (op_info->op_code) {
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case VIRTIO_CRYPTO_AKCIPHER_ENCRYPT:
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CryptodevAsymStatIncEncrypt(backend, len);
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break;
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case VIRTIO_CRYPTO_AKCIPHER_DECRYPT:
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CryptodevAsymStatIncDecrypt(backend, len);
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break;
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case VIRTIO_CRYPTO_AKCIPHER_SIGN:
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CryptodevAsymStatIncSign(backend, len);
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break;
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case VIRTIO_CRYPTO_AKCIPHER_VERIFY:
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CryptodevAsymStatIncVerify(backend, len);
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break;
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default:
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return -VIRTIO_CRYPTO_NOTSUPP;
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}
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} else if (algtype == QCRYPTODEV_BACKEND_ALG_SYM) {
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CryptoDevBackendSymOpInfo *sym_op_info = op_info->u.sym_op_info;
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len = sym_op_info->src_len;
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if (unlikely(!backend->sym_stat)) {
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error_report("cryptodev: Unexpected sym operation");
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return -VIRTIO_CRYPTO_NOTSUPP;
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}
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switch (op_info->op_code) {
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case VIRTIO_CRYPTO_CIPHER_ENCRYPT:
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CryptodevSymStatIncEncrypt(backend, len);
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break;
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case VIRTIO_CRYPTO_CIPHER_DECRYPT:
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CryptodevSymStatIncDecrypt(backend, len);
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break;
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default:
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return -VIRTIO_CRYPTO_NOTSUPP;
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}
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} else {
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error_report("Unsupported cryptodev alg type: %" PRIu32 "", algtype);
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return -VIRTIO_CRYPTO_NOTSUPP;
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}
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return len;
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}
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static void cryptodev_backend_throttle_timer_cb(void *opaque)
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{
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CryptoDevBackend *backend = (CryptoDevBackend *)opaque;
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CryptoDevBackendOpInfo *op_info, *tmpop;
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int ret;
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QTAILQ_FOREACH_SAFE(op_info, &backend->opinfos, next, tmpop) {
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QTAILQ_REMOVE(&backend->opinfos, op_info, next);
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ret = cryptodev_backend_account(backend, op_info);
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if (ret < 0) {
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op_info->cb(op_info->opaque, ret);
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continue;
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}
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throttle_account(&backend->ts, true, ret);
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cryptodev_backend_operation(backend, op_info);
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if (throttle_enabled(&backend->tc) &&
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throttle_schedule_timer(&backend->ts, &backend->tt, true)) {
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break;
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}
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}
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}
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int cryptodev_backend_crypto_operation(
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CryptoDevBackend *backend,
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CryptoDevBackendOpInfo *op_info)
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{
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int ret;
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if (!throttle_enabled(&backend->tc)) {
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goto do_account;
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}
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if (throttle_schedule_timer(&backend->ts, &backend->tt, true) ||
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!QTAILQ_EMPTY(&backend->opinfos)) {
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QTAILQ_INSERT_TAIL(&backend->opinfos, op_info, next);
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return 0;
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}
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do_account:
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ret = cryptodev_backend_account(backend, op_info);
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if (ret < 0) {
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return ret;
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}
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throttle_account(&backend->ts, true, ret);
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return cryptodev_backend_operation(backend, op_info);
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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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uint32_t value;
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if (!visit_type_uint32(v, name, &value, errp)) {
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return;
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}
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if (!value) {
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error_setg(errp, "Property '%s.%s' doesn't take value '%" PRIu32 "'",
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object_get_typename(obj), name, value);
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return;
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}
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backend->conf.peers.queues = value;
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}
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static void cryptodev_backend_set_throttle(CryptoDevBackend *backend, int field,
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uint64_t value, Error **errp)
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{
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uint64_t orig = backend->tc.buckets[field].avg;
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bool enabled = throttle_enabled(&backend->tc);
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if (orig == value) {
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return;
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}
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backend->tc.buckets[field].avg = value;
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if (!throttle_enabled(&backend->tc)) {
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throttle_timers_destroy(&backend->tt);
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cryptodev_backend_throttle_timer_cb(backend); /* drain opinfos */
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return;
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}
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if (!throttle_is_valid(&backend->tc, errp)) {
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backend->tc.buckets[field].avg = orig; /* revert change */
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return;
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}
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if (!enabled) {
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throttle_init(&backend->ts);
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throttle_timers_init(&backend->tt, qemu_get_aio_context(),
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QEMU_CLOCK_REALTIME,
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cryptodev_backend_throttle_timer_cb, /* FIXME */
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cryptodev_backend_throttle_timer_cb, backend);
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}
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throttle_config(&backend->ts, QEMU_CLOCK_REALTIME, &backend->tc);
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}
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static void cryptodev_backend_get_bps(Object *obj, Visitor *v,
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const char *name, void *opaque,
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Error **errp)
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{
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CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
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uint64_t value = backend->tc.buckets[THROTTLE_BPS_TOTAL].avg;
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visit_type_uint64(v, name, &value, errp);
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}
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static void cryptodev_backend_set_bps(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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uint64_t value;
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if (!visit_type_uint64(v, name, &value, errp)) {
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return;
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}
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cryptodev_backend_set_throttle(backend, THROTTLE_BPS_TOTAL, value, errp);
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}
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static void cryptodev_backend_get_ops(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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uint64_t value = backend->tc.buckets[THROTTLE_OPS_TOTAL].avg;
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visit_type_uint64(v, name, &value, errp);
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}
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static void cryptodev_backend_set_ops(Object *obj, Visitor *v,
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const char *name, void *opaque,
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Error **errp)
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{
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CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
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uint64_t value;
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if (!visit_type_uint64(v, name, &value, errp)) {
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return;
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}
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cryptodev_backend_set_throttle(backend, THROTTLE_OPS_TOTAL, value, errp);
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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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uint32_t services;
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uint64_t value;
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QTAILQ_INIT(&backend->opinfos);
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value = backend->tc.buckets[THROTTLE_OPS_TOTAL].avg;
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cryptodev_backend_set_throttle(backend, THROTTLE_OPS_TOTAL, value, errp);
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value = backend->tc.buckets[THROTTLE_BPS_TOTAL].avg;
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cryptodev_backend_set_throttle(backend, THROTTLE_BPS_TOTAL, value, errp);
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if (bc->init) {
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bc->init(backend, errp);
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}
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services = backend->conf.crypto_services;
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if (services & (1 << QCRYPTODEV_BACKEND_SERVICE_CIPHER)) {
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backend->sym_stat = g_new0(CryptodevBackendSymStat, 1);
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}
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if (services & (1 << QCRYPTODEV_BACKEND_SERVICE_AKCIPHER)) {
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backend->asym_stat = g_new0(CryptodevBackendAsymStat, 1);
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}
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}
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void cryptodev_backend_set_used(CryptoDevBackend *backend, bool used)
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{
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backend->is_used = used;
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}
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bool cryptodev_backend_is_used(CryptoDevBackend *backend)
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{
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return backend->is_used;
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}
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void cryptodev_backend_set_ready(CryptoDevBackend *backend, bool ready)
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{
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backend->ready = ready;
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}
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bool cryptodev_backend_is_ready(CryptoDevBackend *backend)
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{
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return backend->ready;
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}
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static bool
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cryptodev_backend_can_be_deleted(UserCreatable *uc)
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{
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return !cryptodev_backend_is_used(CRYPTODEV_BACKEND(uc));
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}
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static void cryptodev_backend_instance_init(Object *obj)
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{
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CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
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/* Initialize devices' queues property to 1 */
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object_property_set_int(obj, "queues", 1, NULL);
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throttle_config_init(&backend->tc);
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}
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static void cryptodev_backend_finalize(Object *obj)
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{
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CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
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cryptodev_backend_cleanup(backend, NULL);
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if (throttle_enabled(&backend->tc)) {
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throttle_timers_destroy(&backend->tt);
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}
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}
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static StatsList *cryptodev_backend_stats_add(const char *name, int64_t *val,
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StatsList *stats_list)
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{
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Stats *stats = g_new0(Stats, 1);
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stats->name = g_strdup(name);
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stats->value = g_new0(StatsValue, 1);
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stats->value->type = QTYPE_QNUM;
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stats->value->u.scalar = *val;
|
|
|
|
QAPI_LIST_PREPEND(stats_list, stats);
|
|
return stats_list;
|
|
}
|
|
|
|
static int cryptodev_backend_stats_query(Object *obj, void *data)
|
|
{
|
|
StatsArgs *stats_args = data;
|
|
StatsResultList **stats_results = stats_args->result.stats;
|
|
StatsList *stats_list = NULL;
|
|
StatsResult *entry;
|
|
CryptoDevBackend *backend;
|
|
CryptodevBackendSymStat *sym_stat;
|
|
CryptodevBackendAsymStat *asym_stat;
|
|
|
|
if (!object_dynamic_cast(obj, TYPE_CRYPTODEV_BACKEND)) {
|
|
return 0;
|
|
}
|
|
|
|
backend = CRYPTODEV_BACKEND(obj);
|
|
sym_stat = backend->sym_stat;
|
|
if (sym_stat) {
|
|
stats_list = cryptodev_backend_stats_add(SYM_ENCRYPT_OPS_STR,
|
|
&sym_stat->encrypt_ops, stats_list);
|
|
stats_list = cryptodev_backend_stats_add(SYM_DECRYPT_OPS_STR,
|
|
&sym_stat->decrypt_ops, stats_list);
|
|
stats_list = cryptodev_backend_stats_add(SYM_ENCRYPT_BYTES_STR,
|
|
&sym_stat->encrypt_bytes, stats_list);
|
|
stats_list = cryptodev_backend_stats_add(SYM_DECRYPT_BYTES_STR,
|
|
&sym_stat->decrypt_bytes, stats_list);
|
|
}
|
|
|
|
asym_stat = backend->asym_stat;
|
|
if (asym_stat) {
|
|
stats_list = cryptodev_backend_stats_add(ASYM_ENCRYPT_OPS_STR,
|
|
&asym_stat->encrypt_ops, stats_list);
|
|
stats_list = cryptodev_backend_stats_add(ASYM_DECRYPT_OPS_STR,
|
|
&asym_stat->decrypt_ops, stats_list);
|
|
stats_list = cryptodev_backend_stats_add(ASYM_SIGN_OPS_STR,
|
|
&asym_stat->sign_ops, stats_list);
|
|
stats_list = cryptodev_backend_stats_add(ASYM_VERIFY_OPS_STR,
|
|
&asym_stat->verify_ops, stats_list);
|
|
stats_list = cryptodev_backend_stats_add(ASYM_ENCRYPT_BYTES_STR,
|
|
&asym_stat->encrypt_bytes, stats_list);
|
|
stats_list = cryptodev_backend_stats_add(ASYM_DECRYPT_BYTES_STR,
|
|
&asym_stat->decrypt_bytes, stats_list);
|
|
stats_list = cryptodev_backend_stats_add(ASYM_SIGN_BYTES_STR,
|
|
&asym_stat->sign_bytes, stats_list);
|
|
stats_list = cryptodev_backend_stats_add(ASYM_VERIFY_BYTES_STR,
|
|
&asym_stat->verify_bytes, stats_list);
|
|
}
|
|
|
|
entry = g_new0(StatsResult, 1);
|
|
entry->provider = STATS_PROVIDER_CRYPTODEV;
|
|
entry->qom_path = object_get_canonical_path(obj);
|
|
entry->stats = stats_list;
|
|
QAPI_LIST_PREPEND(*stats_results, entry);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void cryptodev_backend_stats_cb(StatsResultList **result,
|
|
StatsTarget target,
|
|
strList *names, strList *targets,
|
|
Error **errp)
|
|
{
|
|
switch (target) {
|
|
case STATS_TARGET_CRYPTODEV:
|
|
{
|
|
Object *objs = container_get(object_get_root(), "/objects");
|
|
StatsArgs stats_args;
|
|
stats_args.result.stats = result;
|
|
stats_args.names = names;
|
|
stats_args.errp = errp;
|
|
|
|
object_child_foreach(objs, cryptodev_backend_stats_query, &stats_args);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static StatsSchemaValueList *cryptodev_backend_schemas_add(const char *name,
|
|
StatsSchemaValueList *list)
|
|
{
|
|
StatsSchemaValueList *schema_entry = g_new0(StatsSchemaValueList, 1);
|
|
|
|
schema_entry->value = g_new0(StatsSchemaValue, 1);
|
|
schema_entry->value->type = STATS_TYPE_CUMULATIVE;
|
|
schema_entry->value->name = g_strdup(name);
|
|
schema_entry->next = list;
|
|
|
|
return schema_entry;
|
|
}
|
|
|
|
static void cryptodev_backend_schemas_cb(StatsSchemaList **result,
|
|
Error **errp)
|
|
{
|
|
StatsSchemaValueList *stats_list = NULL;
|
|
const char *sym_stats[] = { SYM_ENCRYPT_OPS_STR, SYM_DECRYPT_OPS_STR,
|
|
SYM_ENCRYPT_BYTES_STR, SYM_DECRYPT_BYTES_STR };
|
|
const char *asym_stats[] = { ASYM_ENCRYPT_OPS_STR, ASYM_DECRYPT_OPS_STR,
|
|
ASYM_SIGN_OPS_STR, ASYM_VERIFY_OPS_STR,
|
|
ASYM_ENCRYPT_BYTES_STR, ASYM_DECRYPT_BYTES_STR,
|
|
ASYM_SIGN_BYTES_STR, ASYM_VERIFY_BYTES_STR };
|
|
|
|
for (int i = 0; i < ARRAY_SIZE(sym_stats); i++) {
|
|
stats_list = cryptodev_backend_schemas_add(sym_stats[i], stats_list);
|
|
}
|
|
|
|
for (int i = 0; i < ARRAY_SIZE(asym_stats); i++) {
|
|
stats_list = cryptodev_backend_schemas_add(asym_stats[i], stats_list);
|
|
}
|
|
|
|
add_stats_schema(result, STATS_PROVIDER_CRYPTODEV, STATS_TARGET_CRYPTODEV,
|
|
stats_list);
|
|
}
|
|
|
|
static void
|
|
cryptodev_backend_class_init(ObjectClass *oc, void *data)
|
|
{
|
|
UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
|
|
|
|
ucc->complete = cryptodev_backend_complete;
|
|
ucc->can_be_deleted = cryptodev_backend_can_be_deleted;
|
|
|
|
QTAILQ_INIT(&crypto_clients);
|
|
object_class_property_add(oc, "queues", "uint32",
|
|
cryptodev_backend_get_queues,
|
|
cryptodev_backend_set_queues,
|
|
NULL, NULL);
|
|
object_class_property_add(oc, "throttle-bps", "uint64",
|
|
cryptodev_backend_get_bps,
|
|
cryptodev_backend_set_bps,
|
|
NULL, NULL);
|
|
object_class_property_add(oc, "throttle-ops", "uint64",
|
|
cryptodev_backend_get_ops,
|
|
cryptodev_backend_set_ops,
|
|
NULL, NULL);
|
|
|
|
add_stats_callbacks(STATS_PROVIDER_CRYPTODEV, cryptodev_backend_stats_cb,
|
|
cryptodev_backend_schemas_cb);
|
|
}
|
|
|
|
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);
|