static void chr_closed_bh(void *opaque)
{
const char *name = opaque;
NetClientState *ncs[MAX_QUEUE_NUM];
VhostUserState *s;
Error *err = NULL;
int queues;
queues = qemu_find_net_clients_except(name, ncs,
NET_CLIENT_DRIVER_NIC,
MAX_QUEUE_NUM);
assert(queues < MAX_QUEUE_NUM);
s = DO_UPCAST(VhostUserState, nc, ncs[0]);
qmp_set_link(name, false, &err);
vhost_user_stop(queues, ncs);
qemu_chr_fe_set_handlers(&s->chr, NULL, NULL, net_vhost_user_event,
NULL, opaque, NULL, true);
if (err) {
error_report_err(err);
}
}
static void net_vhost_user_event(void *opaque, int event)
{
const char *name = opaque;
NetClientState *ncs[MAX_QUEUE_NUM];
VhostUserState *s;
Chardev *chr;
Error *err = NULL;
int queues;
queues = qemu_find_net_clients_except(name, ncs,
NET_CLIENT_DRIVER_NIC,
MAX_QUEUE_NUM);
assert(queues < MAX_QUEUE_NUM);
s = DO_UPCAST(VhostUserState, nc, ncs[0]);
chr = qemu_chr_fe_get_driver(&s->chr);
trace_vhost_user_event(chr->label, event);
switch (event) {
case CHR_EVENT_OPENED:
if (vhost_user_start(queues, ncs, &s->chr) < 0) {
qemu_chr_fe_disconnect(&s->chr);
return;
}
s->watch = qemu_chr_fe_add_watch(&s->chr, G_IO_HUP,
net_vhost_user_watch, s);
qmp_set_link(name, true, &err);
s->started = true;
break;
case CHR_EVENT_CLOSED:
/* a close event may happen during a read/write, but vhost
* code assumes the vhost_dev remains setup, so delay the
* stop & clear to idle.
* FIXME: better handle failure in vhost code, remove bh
*/
if (s->watch) {
AioContext *ctx = qemu_get_current_aio_context();
g_source_remove(s->watch);
s->watch = 0;
qemu_chr_fe_set_handlers(&s->chr, NULL, NULL, NULL, NULL,
NULL, NULL, false);
aio_bh_schedule_oneshot(ctx, chr_closed_bh, opaque);
}
break;
}
if (err) {
error_report_err(err);
}
}
static int parse_netdev(DeviceState *dev, const char *str, void **ptr)
{
NICPeers *peers_ptr = (NICPeers *)ptr;
NetClientState **ncs = peers_ptr->ncs;
NetClientState *peers[MAX_QUEUE_NUM];
int queues, i = 0;
int ret;
queues = qemu_find_net_clients_except(str, peers,
NET_CLIENT_OPTIONS_KIND_NIC,
MAX_QUEUE_NUM);
if (queues == 0) {
ret = -ENOENT;
goto err;
}
if (queues > MAX_QUEUE_NUM) {
ret = -E2BIG;
goto err;
}
for (i = 0; i < queues; i++) {
if (peers[i] == NULL) {
ret = -ENOENT;
goto err;
}
if (peers[i]->peer) {
ret = -EEXIST;
goto err;
}
if (ncs[i]) {
ret = -EINVAL;
goto err;
}
ncs[i] = peers[i];
ncs[i]->queue_index = i;
}
peers_ptr->queues = queues;
return 0;
err:
return ret;
}
static void net_vhost_user_event(void *opaque, int event)
{
const char *name = opaque;
NetClientState *ncs[MAX_QUEUE_NUM];
VhostUserState *s;
CharDriverState *chr;
Error *err = NULL;
int queues;
queues = qemu_find_net_clients_except(name, ncs,
NET_CLIENT_DRIVER_NIC,
MAX_QUEUE_NUM);
assert(queues < MAX_QUEUE_NUM);
s = DO_UPCAST(VhostUserState, nc, ncs[0]);
chr = qemu_chr_fe_get_driver(&s->chr);
trace_vhost_user_event(chr->label, event);
switch (event) {
case CHR_EVENT_OPENED:
s->watch = qemu_chr_fe_add_watch(&s->chr, G_IO_HUP,
net_vhost_user_watch, s);
if (vhost_user_start(queues, ncs, &s->chr) < 0) {
qemu_chr_fe_disconnect(&s->chr);
return;
}
qmp_set_link(name, true, &err);
s->started = true;
break;
case CHR_EVENT_CLOSED:
qmp_set_link(name, false, &err);
vhost_user_stop(queues, ncs);
g_source_remove(s->watch);
s->watch = 0;
break;
}
if (err) {
error_report_err(err);
}
}
static void set_netdev(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
DeviceState *dev = DEVICE(obj);
Property *prop = opaque;
NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
NetClientState **ncs = peers_ptr->ncs;
NetClientState *peers[MAX_QUEUE_NUM];
Error *local_err = NULL;
int queues, err = 0, i = 0;
char *str;
if (dev->realized) {
qdev_prop_set_after_realize(dev, name, errp);
return;
}
visit_type_str(v, name, &str, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
queues = qemu_find_net_clients_except(str, peers,
NET_CLIENT_DRIVER_NIC,
MAX_QUEUE_NUM);
if (queues == 0) {
err = -ENOENT;
goto out;
}
if (queues > MAX_QUEUE_NUM) {
error_setg(errp, "queues of backend '%s'(%d) exceeds QEMU limitation(%d)",
str, queues, MAX_QUEUE_NUM);
goto out;
}
for (i = 0; i < queues; i++) {
if (peers[i] == NULL) {
err = -ENOENT;
goto out;
}
if (peers[i]->peer) {
err = -EEXIST;
goto out;
}
if (ncs[i]) {
err = -EINVAL;
goto out;
}
ncs[i] = peers[i];
ncs[i]->queue_index = i;
}
peers_ptr->queues = queues;
out:
error_set_from_qdev_prop_error(errp, err, dev, prop, str);
g_free(str);
}
