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qemu/backends/cryptodev.c
Philippe Mathieu-Daudé 484aecf2d3 backends/cryptodev: Do not ignore throttle/backends Errors 
Both cryptodev_backend_set_throttle() and CryptoDevBackendClass::init()
can set their Error** argument. Do not ignore them, return early
on failure. Without that, running into another failure trips
error_setv()'s assertion. Use the ERRP_GUARD() macro as suggested
in commit ae7c80a7bd ("error: New macro ERRP_GUARD()").

Cc: qemu-stable@nongnu.org
Fixes: e7a775fd9f ("cryptodev: Account statistics")
Fixes: 2580b452ff ("cryptodev: support QoS")
Reviewed-by: zhenwei pi <pizhenwei@bytedance.com>
Reviewed-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20231120150418.93443-1-philmd@linaro.org>
2024-01-19 12:28:59 +01:00

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/*
* 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 2.1 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 "sysemu/stats.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-cryptodev.h"
#include "qapi/qapi-types-stats.h"
#include "qapi/visitor.h"
#include "qemu/config-file.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
#include "qom/object_interfaces.h"
#include "hw/virtio/virtio-crypto.h"
#define SYM_ENCRYPT_OPS_STR "sym-encrypt-ops"
#define SYM_DECRYPT_OPS_STR "sym-decrypt-ops"
#define SYM_ENCRYPT_BYTES_STR "sym-encrypt-bytes"
#define SYM_DECRYPT_BYTES_STR "sym-decrypt-bytes"
#define ASYM_ENCRYPT_OPS_STR "asym-encrypt-ops"
#define ASYM_DECRYPT_OPS_STR "asym-decrypt-ops"
#define ASYM_SIGN_OPS_STR "asym-sign-ops"
#define ASYM_VERIFY_OPS_STR "asym-verify-ops"
#define ASYM_ENCRYPT_BYTES_STR "asym-encrypt-bytes"
#define ASYM_DECRYPT_BYTES_STR "asym-decrypt-bytes"
#define ASYM_SIGN_BYTES_STR "asym-sign-bytes"
#define ASYM_VERIFY_BYTES_STR "asym-verify-bytes"
typedef struct StatsArgs {
union StatsResultsType {
StatsResultList **stats;
StatsSchemaList **schema;
} result;
strList *names;
Error **errp;
} StatsArgs;
static QTAILQ_HEAD(, CryptoDevBackendClient) crypto_clients;
static int qmp_query_cryptodev_foreach(Object *obj, void *data)
{
CryptoDevBackend *backend;
QCryptodevInfoList **infolist = data;
uint32_t services, i;
if (!object_dynamic_cast(obj, TYPE_CRYPTODEV_BACKEND)) {
return 0;
}
QCryptodevInfo *info = g_new0(QCryptodevInfo, 1);
info->id = g_strdup(object_get_canonical_path_component(obj));
backend = CRYPTODEV_BACKEND(obj);
services = backend->conf.crypto_services;
for (i = 0; i < QCRYPTODEV_BACKEND_SERVICE__MAX; i++) {
if (services & (1 << i)) {
QAPI_LIST_PREPEND(info->service, i);
}
}
for (i = 0; i < backend->conf.peers.queues; i++) {
CryptoDevBackendClient *cc = backend->conf.peers.ccs[i];
QCryptodevBackendClient *client = g_new0(QCryptodevBackendClient, 1);
client->queue = cc->queue_index;
client->type = cc->type;
QAPI_LIST_PREPEND(info->client, client);
}
QAPI_LIST_PREPEND(*infolist, info);
return 0;
}
QCryptodevInfoList *qmp_query_cryptodev(Error **errp)
{
QCryptodevInfoList *list = NULL;
Object *objs = container_get(object_get_root(), "/objects");
object_child_foreach(objs, qmp_query_cryptodev_foreach, &list);
return list;
}
CryptoDevBackendClient *cryptodev_backend_new_client(void)
{
CryptoDevBackendClient *cc;
cc = g_new0(CryptoDevBackendClient, 1);
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->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);
}
g_free(backend->sym_stat);
g_free(backend->asym_stat);
}
int cryptodev_backend_create_session(
CryptoDevBackend *backend,
CryptoDevBackendSessionInfo *sess_info,
uint32_t queue_index,
CryptoDevCompletionFunc cb,
void *opaque)
{
CryptoDevBackendClass *bc =
CRYPTODEV_BACKEND_GET_CLASS(backend);
if (bc->create_session) {
return bc->create_session(backend, sess_info, queue_index, cb, opaque);
}
return -VIRTIO_CRYPTO_NOTSUPP;
}
int cryptodev_backend_close_session(
CryptoDevBackend *backend,
uint64_t session_id,
uint32_t queue_index,
CryptoDevCompletionFunc cb,
void *opaque)
{
CryptoDevBackendClass *bc =
CRYPTODEV_BACKEND_GET_CLASS(backend);
if (bc->close_session) {
return bc->close_session(backend, session_id, queue_index, cb, opaque);
}
return -VIRTIO_CRYPTO_NOTSUPP;
}
static int cryptodev_backend_operation(
CryptoDevBackend *backend,
CryptoDevBackendOpInfo *op_info)
{
CryptoDevBackendClass *bc =
CRYPTODEV_BACKEND_GET_CLASS(backend);
if (bc->do_op) {
return bc->do_op(backend, op_info);
}
return -VIRTIO_CRYPTO_NOTSUPP;
}
static int cryptodev_backend_account(CryptoDevBackend *backend,
CryptoDevBackendOpInfo *op_info)
{
enum QCryptodevBackendAlgType algtype = op_info->algtype;
int len;
if (algtype == QCRYPTODEV_BACKEND_ALG_ASYM) {
CryptoDevBackendAsymOpInfo *asym_op_info = op_info->u.asym_op_info;
len = asym_op_info->src_len;
if (unlikely(!backend->asym_stat)) {
error_report("cryptodev: Unexpected asym operation");
return -VIRTIO_CRYPTO_NOTSUPP;
}
switch (op_info->op_code) {
case VIRTIO_CRYPTO_AKCIPHER_ENCRYPT:
CryptodevAsymStatIncEncrypt(backend, len);
break;
case VIRTIO_CRYPTO_AKCIPHER_DECRYPT:
CryptodevAsymStatIncDecrypt(backend, len);
break;
case VIRTIO_CRYPTO_AKCIPHER_SIGN:
CryptodevAsymStatIncSign(backend, len);
break;
case VIRTIO_CRYPTO_AKCIPHER_VERIFY:
CryptodevAsymStatIncVerify(backend, len);
break;
default:
return -VIRTIO_CRYPTO_NOTSUPP;
}
} else if (algtype == QCRYPTODEV_BACKEND_ALG_SYM) {
CryptoDevBackendSymOpInfo *sym_op_info = op_info->u.sym_op_info;
len = sym_op_info->src_len;
if (unlikely(!backend->sym_stat)) {
error_report("cryptodev: Unexpected sym operation");
return -VIRTIO_CRYPTO_NOTSUPP;
}
switch (op_info->op_code) {
case VIRTIO_CRYPTO_CIPHER_ENCRYPT:
CryptodevSymStatIncEncrypt(backend, len);
break;
case VIRTIO_CRYPTO_CIPHER_DECRYPT:
CryptodevSymStatIncDecrypt(backend, len);
break;
default:
return -VIRTIO_CRYPTO_NOTSUPP;
}
} else {
error_report("Unsupported cryptodev alg type: %" PRIu32 "", algtype);
return -VIRTIO_CRYPTO_NOTSUPP;
}
return len;
}
static void cryptodev_backend_throttle_timer_cb(void *opaque)
{
CryptoDevBackend *backend = (CryptoDevBackend *)opaque;
CryptoDevBackendOpInfo *op_info, *tmpop;
int ret;
QTAILQ_FOREACH_SAFE(op_info, &backend->opinfos, next, tmpop) {
QTAILQ_REMOVE(&backend->opinfos, op_info, next);
ret = cryptodev_backend_account(backend, op_info);
if (ret < 0) {
op_info->cb(op_info->opaque, ret);
continue;
}
throttle_account(&backend->ts, THROTTLE_WRITE, ret);
cryptodev_backend_operation(backend, op_info);
if (throttle_enabled(&backend->tc) &&
throttle_schedule_timer(&backend->ts, &backend->tt,
THROTTLE_WRITE)) {
break;
}
}
}
int cryptodev_backend_crypto_operation(
CryptoDevBackend *backend,
CryptoDevBackendOpInfo *op_info)
{
int ret;
if (!throttle_enabled(&backend->tc)) {
goto do_account;
}
if (throttle_schedule_timer(&backend->ts, &backend->tt, THROTTLE_WRITE) ||
!QTAILQ_EMPTY(&backend->opinfos)) {
QTAILQ_INSERT_TAIL(&backend->opinfos, op_info, next);
return 0;
}
do_account:
ret = cryptodev_backend_account(backend, op_info);
if (ret < 0) {
return ret;
}
throttle_account(&backend->ts, THROTTLE_WRITE, ret);
return cryptodev_backend_operation(backend, op_info);
}
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);
uint32_t value;
if (!visit_type_uint32(v, name, &value, errp)) {
return;
}
if (!value) {
error_setg(errp, "Property '%s.%s' doesn't take value '%" PRIu32 "'",
object_get_typename(obj), name, value);
return;
}
backend->conf.peers.queues = value;
}
static void cryptodev_backend_set_throttle(CryptoDevBackend *backend, int field,
uint64_t value, Error **errp)
{
uint64_t orig = backend->tc.buckets[field].avg;
bool enabled = throttle_enabled(&backend->tc);
if (orig == value) {
return;
}
backend->tc.buckets[field].avg = value;
if (!throttle_enabled(&backend->tc)) {
throttle_timers_destroy(&backend->tt);
cryptodev_backend_throttle_timer_cb(backend); /* drain opinfos */
return;
}
if (!throttle_is_valid(&backend->tc, errp)) {
backend->tc.buckets[field].avg = orig; /* revert change */
return;
}
if (!enabled) {
throttle_init(&backend->ts);
throttle_timers_init(&backend->tt, qemu_get_aio_context(),
QEMU_CLOCK_REALTIME, NULL,
cryptodev_backend_throttle_timer_cb, backend);
}
throttle_config(&backend->ts, QEMU_CLOCK_REALTIME, &backend->tc);
}
static void cryptodev_backend_get_bps(Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
uint64_t value = backend->tc.buckets[THROTTLE_BPS_TOTAL].avg;
visit_type_uint64(v, name, &value, errp);
}
static void cryptodev_backend_set_bps(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
uint64_t value;
if (!visit_type_uint64(v, name, &value, errp)) {
return;
}
cryptodev_backend_set_throttle(backend, THROTTLE_BPS_TOTAL, value, errp);
}
static void cryptodev_backend_get_ops(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
uint64_t value = backend->tc.buckets[THROTTLE_OPS_TOTAL].avg;
visit_type_uint64(v, name, &value, errp);
}
static void cryptodev_backend_set_ops(Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
uint64_t value;
if (!visit_type_uint64(v, name, &value, errp)) {
return;
}
cryptodev_backend_set_throttle(backend, THROTTLE_OPS_TOTAL, value, errp);
}
static void
cryptodev_backend_complete(UserCreatable *uc, Error **errp)
{
ERRP_GUARD();
CryptoDevBackend *backend = CRYPTODEV_BACKEND(uc);
CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_GET_CLASS(uc);
uint32_t services;
uint64_t value;
QTAILQ_INIT(&backend->opinfos);
value = backend->tc.buckets[THROTTLE_OPS_TOTAL].avg;
cryptodev_backend_set_throttle(backend, THROTTLE_OPS_TOTAL, value, errp);
if (*errp) {
return;
}
value = backend->tc.buckets[THROTTLE_BPS_TOTAL].avg;
cryptodev_backend_set_throttle(backend, THROTTLE_BPS_TOTAL, value, errp);
if (*errp) {
return;
}
if (bc->init) {
bc->init(backend, errp);
if (*errp) {
return;
}
}
services = backend->conf.crypto_services;
if (services & (1 << QCRYPTODEV_BACKEND_SERVICE_CIPHER)) {
backend->sym_stat = g_new0(CryptodevBackendSymStat, 1);
}
if (services & (1 << QCRYPTODEV_BACKEND_SERVICE_AKCIPHER)) {
backend->asym_stat = g_new0(CryptodevBackendAsymStat, 1);
}
}
void cryptodev_backend_set_used(CryptoDevBackend *backend, bool used)
{
backend->is_used = used;
}
bool cryptodev_backend_is_used(CryptoDevBackend *backend)
{
return backend->is_used;
}
void cryptodev_backend_set_ready(CryptoDevBackend *backend, bool ready)
{
backend->ready = ready;
}
bool cryptodev_backend_is_ready(CryptoDevBackend *backend)
{
return backend->ready;
}
static bool
cryptodev_backend_can_be_deleted(UserCreatable *uc)
{
return !cryptodev_backend_is_used(CRYPTODEV_BACKEND(uc));
}
static void cryptodev_backend_instance_init(Object *obj)
{
CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
/* Initialize devices' queues property to 1 */
object_property_set_int(obj, "queues", 1, NULL);
throttle_config_init(&backend->tc);
}
static void cryptodev_backend_finalize(Object *obj)
{
CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
cryptodev_backend_cleanup(backend, NULL);
if (throttle_enabled(&backend->tc)) {
throttle_timers_destroy(&backend->tt);
}
}
static StatsList *cryptodev_backend_stats_add(const char *name, int64_t *val,
StatsList *stats_list)
{
Stats *stats = g_new0(Stats, 1);
stats->name = g_strdup(name);
stats->value = g_new0(StatsValue, 1);
stats->value->type = QTYPE_QNUM;
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);
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