static int vhost_user_start(VhostUserState *s)
{
VhostNetOptions options;
if (vhost_user_running(s)) {
return 0;
}
options.backend_type = VHOST_BACKEND_TYPE_USER;
options.net_backend = &s->nc;
options.opaque = s->chr;
s->vhost_net = vhost_net_init(&options);
return vhost_user_running(s) ? 0 : -1;
}
static void vhost_user_stop(VhostUserState *s)
{
if (vhost_user_running(s)) {
vhost_net_cleanup(s->vhost_net);
}
s->vhost_net = 0;
}
static int vhost_user_start(int queues, NetClientState *ncs[])
{
VhostNetOptions options;
VhostUserState *s;
int max_queues;
int i;
options.backend_type = VHOST_BACKEND_TYPE_USER;
for (i = 0; i < queues; i++) {
assert (ncs[i]->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
s = DO_UPCAST(VhostUserState, nc, ncs[i]);
if (vhost_user_running(s)) {
continue;
}
options.net_backend = ncs[i];
options.opaque = s->chr;
s->vhost_net = vhost_net_init(&options);
if (!s->vhost_net) {
error_report("failed to init vhost_net for queue %d\n", i);
goto err;
}
if (i == 0) {
max_queues = vhost_net_get_max_queues(s->vhost_net);
if (queues > max_queues) {
error_report("you are asking more queues than "
"supported: %d\n", max_queues);
goto err;
}
}
}
return 0;
err:
vhost_user_stop(i + 1, ncs);
return -1;
}
static void vhost_user_stop(int queues, NetClientState *ncs[])
{
VhostUserState *s;
int i;
for (i = 0; i < queues; i++) {
assert (ncs[i]->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
s = DO_UPCAST(VhostUserState, nc, ncs[i]);
if (!vhost_user_running(s)) {
continue;
}
if (s->vhost_net) {
/* save acked features */
s->acked_features = vhost_net_get_acked_features(s->vhost_net);
vhost_net_cleanup(s->vhost_net);
s->vhost_net = NULL;
}
}
}
