Re: [PATCH v3 05/12] cryptodev: Introduce 'query-cryptodev' QMP command

["Michael S. Tsirkin" <mst@redhat.com>]

On Sat, Jan 28, 2023 at 11:56:26AM +0800, zhenwei pi wrote:
> Now we have a QMP command to query crypto devices:
> virsh qemu-monitor-command vm '{"execute": "query-cryptodev"}' | jq
> {
>   "return": [
>     {
>       "service": [
>         "akcipher",
>         "mac",
>         "hash",
>         "cipher"
>       ],
>       "id": "cryptodev1",
>       "client": [
>         {
>           "queue": 0,
>           "type": "builtin"
>         }
>       ]
>     },
>     {
>       "service": [
>         "akcipher"
>       ],
>       "id": "cryptodev0",
>       "client": [
>         {
>           "queue": 0,
>           "type": "lkcf"
>         }
>       ]
>     }
>   ],
>   "id": "libvirt-417"
> }
> 
> Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
> ---
>  backends/cryptodev.c | 45 ++++++++++++++++++++++++++++++++++++++++++++
>  qapi/cryptodev.json  | 44 +++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 89 insertions(+)
> 
> diff --git a/backends/cryptodev.c b/backends/cryptodev.c
> index c2a053db0e..d51eeb5ee4 100644
> --- a/backends/cryptodev.c
> +++ b/backends/cryptodev.c
> @@ -24,6 +24,7 @@
>  #include "qemu/osdep.h"
>  #include "sysemu/cryptodev.h"
>  #include "qapi/error.h"
> +#include "qapi/qapi-commands-cryptodev.h"
>  #include "qapi/visitor.h"
>  #include "qemu/config-file.h"
>  #include "qemu/error-report.h"
> @@ -33,6 +34,50 @@
>  
>  static QTAILQ_HEAD(, CryptoDevBackendClient) crypto_clients;
>  
> +static int qmp_query_cryptodev_foreach(Object *obj, void *data)
> +{
> +    CryptoDevBackend *backend;
> +    CryptodevInfoList **infolist = data;
> +    uint32_t services, i;
> +
> +    if (!object_dynamic_cast(obj, TYPE_CRYPTODEV_BACKEND)) {
> +        return 0;
> +    }
> +
> +    CryptodevInfo *info = g_new0(CryptodevInfo, 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];
> +        CryptodevBackendClient *client = g_new0(CryptodevBackendClient, 1);
> +
> +        client->queue = cc->queue_index;
> +        client->type = cc->type;
> +        QAPI_LIST_PREPEND(info->client, client);
> +    }
> +
> +    QAPI_LIST_PREPEND(*infolist, info);
> +
> +    return 0;
> +}
> +
> +CryptodevInfoList *qmp_query_cryptodev(Error **errp)
> +{
> +    CryptodevInfoList *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)
>  {
> diff --git a/qapi/cryptodev.json b/qapi/cryptodev.json
> index 8732a30524..940078ace0 100644
> --- a/qapi/cryptodev.json
> +++ b/qapi/cryptodev.json
> @@ -43,3 +43,47 @@
>  { 'enum': 'QCryptodevBackendType',
>    'prefix': 'QCRYPTODEV_BACKEND_TYPE',
>    'data': ['builtin', 'vhost-user', 'lkcf']}
> +
> +##
> +# @CryptodevBackendClient:
> +#
> +# Information about a queue of crypto device.
> +#
> +# @queue: the queue index of the crypto device
> +#
> +# @type: the type of the crypto device
> +#
> +# Since: 8.0
> +##
> +{ 'struct': 'CryptodevBackendClient',
> +  'data': { 'queue': 'uint32',
> +            'type': 'QCryptodevBackendType' } }
> +
> +##
> +# @CryptodevInfo:
> +#
> +# Information about a crypto device.
> +#
> +# @id: the id of the crypto device
> +#
> +# @service: supported service types of a crypto device
> +#
> +# @client: the additional infomation of the crypto device
> +#
> +# Since: 8.0
> +##
> +{ 'struct': 'CryptodevInfo',
> +  'data': { 'id': 'str',
> +            'service': ['QCryptodevBackendServiceType'],
> +            'client': ['CryptodevBackendClient'] } }

So we end up with both CryptodevBackendClient and
CryptoDevBackendClient. Please don't do this.


> +
> +##
> +# @query-cryptodev:
> +#
> +# Returns information about current crypto devices.
> +#
> +# Returns: a list of @CryptodevInfo
> +#
> +# Since: 8.0
> +##
> +{ 'command': 'query-cryptodev', 'returns': ['CryptodevInfo']}
> -- 
> 2.34.1