qapi: Change Netdev into a flat union
This is a mostly-mechanical conversion that creates a new flat
union 'Netdev' QAPI type that covers all the branches of the
former 'NetClientOptions' simple union, where the branches are
now listed in a new 'NetClientDriver' enum rather than generated
from the simple union. The existence of a flat union has no
change to the command line syntax accepted for new code, and
will make it possible for a future patch to switch the QMP
command to parse a boxed union for no change to valid QMP; but
it does have some ripple effect on the C code when dealing with
the new types.
While making the conversion, note that the 'NetLegacy' type
remains unchanged: it applies only to legacy command line options,
and will not be ported to QMP, so it should remain a wrapper
around a simple union; to avoid confusion, the type named
'NetClientOptions' is now gone, and we introduce 'NetLegacyOptions'
in its place. Then, in the C code, we convert from NetLegacy to
Netdev as soon as possible, so that the bulk of the net stack
only has to deal with one QAPI type, not two. Note that since
the old legacy code always rejected 'hubport', we can just omit
that branch from the new 'NetLegacyOptions' simple union.
Based on an idea originally by Zoltán Kővágó <DirtY.iCE.hu@gmail.com>:
Message-Id: <01a527fbf1a5de880091f98cf011616a78adeeee.1441627176.git.DirtY.iCE.hu@gmail.com>
although the sed script in that patch no longer applies due to
other changes in the tree since then, and I also did some manual
cleanups (such as fixing whitespace to keep checkpatch happy).
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1468468228-27827-13-git-send-email-eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Fixup from Eric squashed in]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
diff --git a/net/net.c b/net/net.c
index d80fd82..4a7f392 100644
--- a/net/net.c
+++ b/net/net.c
@@ -289,7 +289,7 @@
NICState *nic;
int i, queues = MAX(1, conf->peers.queues);
- assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
+ assert(info->type == NET_CLIENT_DRIVER_NIC);
assert(info->size >= sizeof(NICState));
nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
@@ -360,13 +360,13 @@
int queues, i;
NetFilterState *nf, *next;
- assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
+ assert(nc->info->type != NET_CLIENT_DRIVER_NIC);
/* If the NetClientState belongs to a multiqueue backend, we will change all
* other NetClientStates also.
*/
queues = qemu_find_net_clients_except(nc->name, ncs,
- NET_CLIENT_OPTIONS_KIND_NIC,
+ NET_CLIENT_DRIVER_NIC,
MAX_QUEUE_NUM);
assert(queues != 0);
@@ -375,7 +375,7 @@
}
/* If there is a peer NIC, delete and cleanup client, but do not free. */
- if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_NIC) {
NICState *nic = qemu_get_nic(nc->peer);
if (nic->peer_deleted) {
return;
@@ -431,7 +431,7 @@
NetClientState *nc;
QTAILQ_FOREACH(nc, &net_clients, next) {
- if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ if (nc->info->type == NET_CLIENT_DRIVER_NIC) {
if (nc->queue_index == 0) {
func(qemu_get_nic(nc), opaque);
}
@@ -603,7 +603,7 @@
{
nc->receive_disabled = 0;
- if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
+ if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_HUBPORT) {
if (net_hub_flush(nc->peer)) {
qemu_notify_event();
}
@@ -777,7 +777,7 @@
NetClientState *nc;
QTAILQ_FOREACH(nc, &net_clients, next) {
- if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
+ if (nc->info->type == NET_CLIENT_DRIVER_NIC)
continue;
if (!strcmp(nc->name, id)) {
return nc;
@@ -788,7 +788,7 @@
}
int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
- NetClientOptionsKind type, int max)
+ NetClientDriver type, int max)
{
NetClientState *nc;
int ret = 0;
@@ -869,8 +869,8 @@
NICInfo *nd;
const NetLegacyNicOptions *nic;
- assert(netdev->opts->type == NET_CLIENT_OPTIONS_KIND_NIC);
- nic = netdev->opts->u.nic.data;
+ assert(netdev->type == NET_CLIENT_DRIVER_NIC);
+ nic = &netdev->u.nic;
idx = nic_get_free_idx();
if (idx == -1 || nb_nics >= MAX_NICS) {
@@ -930,39 +930,38 @@
}
-static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND__MAX])(
+static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])(
const Netdev *netdev,
const char *name,
NetClientState *peer, Error **errp) = {
- [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
+ [NET_CLIENT_DRIVER_NIC] = net_init_nic,
#ifdef CONFIG_SLIRP
- [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
+ [NET_CLIENT_DRIVER_USER] = net_init_slirp,
#endif
- [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
- [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
+ [NET_CLIENT_DRIVER_TAP] = net_init_tap,
+ [NET_CLIENT_DRIVER_SOCKET] = net_init_socket,
#ifdef CONFIG_VDE
- [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
+ [NET_CLIENT_DRIVER_VDE] = net_init_vde,
#endif
#ifdef CONFIG_NETMAP
- [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap,
+ [NET_CLIENT_DRIVER_NETMAP] = net_init_netmap,
#endif
- [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
+ [NET_CLIENT_DRIVER_DUMP] = net_init_dump,
#ifdef CONFIG_NET_BRIDGE
- [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
+ [NET_CLIENT_DRIVER_BRIDGE] = net_init_bridge,
#endif
- [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
+ [NET_CLIENT_DRIVER_HUBPORT] = net_init_hubport,
#ifdef CONFIG_VHOST_NET_USED
- [NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user,
+ [NET_CLIENT_DRIVER_VHOST_USER] = net_init_vhost_user,
#endif
#ifdef CONFIG_L2TPV3
- [NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3,
+ [NET_CLIENT_DRIVER_L2TPV3] = net_init_l2tpv3,
#endif
};
static int net_client_init1(const void *object, int is_netdev, Error **errp)
{
- const NetClientOptions *opts;
Netdev legacy = {0};
const Netdev *netdev;
const char *name;
@@ -970,34 +969,72 @@
if (is_netdev) {
netdev = object;
- opts = netdev->opts;
name = netdev->id;
- if (opts->type == NET_CLIENT_OPTIONS_KIND_DUMP ||
- opts->type == NET_CLIENT_OPTIONS_KIND_NIC ||
- !net_client_init_fun[opts->type]) {
+ if (netdev->type == NET_CLIENT_DRIVER_DUMP ||
+ netdev->type == NET_CLIENT_DRIVER_NIC ||
+ !net_client_init_fun[netdev->type]) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
"a netdev backend type");
return -1;
}
} else {
const NetLegacy *net = object;
+ const NetLegacyOptions *opts = net->opts;
legacy.id = net->id;
- opts = legacy.opts = net->opts;
netdev = &legacy;
/* missing optional values have been initialized to "all bits zero" */
name = net->has_id ? net->id : net->name;
- if (opts->type == NET_CLIENT_OPTIONS_KIND_NONE) {
+ /* Map the old options to the new flat type */
+ switch (opts->type) {
+ case NET_LEGACY_OPTIONS_KIND_NONE:
return 0; /* nothing to do */
- }
- if (opts->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
- error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
- "a net type");
- return -1;
+ case NET_LEGACY_OPTIONS_KIND_NIC:
+ legacy.type = NET_CLIENT_DRIVER_NIC;
+ legacy.u.nic = *opts->u.nic.data;
+ break;
+ case NET_LEGACY_OPTIONS_KIND_USER:
+ legacy.type = NET_CLIENT_DRIVER_USER;
+ legacy.u.user = *opts->u.user.data;
+ break;
+ case NET_LEGACY_OPTIONS_KIND_TAP:
+ legacy.type = NET_CLIENT_DRIVER_TAP;
+ legacy.u.tap = *opts->u.tap.data;
+ break;
+ case NET_LEGACY_OPTIONS_KIND_L2TPV3:
+ legacy.type = NET_CLIENT_DRIVER_L2TPV3;
+ legacy.u.l2tpv3 = *opts->u.l2tpv3.data;
+ break;
+ case NET_LEGACY_OPTIONS_KIND_SOCKET:
+ legacy.type = NET_CLIENT_DRIVER_SOCKET;
+ legacy.u.socket = *opts->u.socket.data;
+ break;
+ case NET_LEGACY_OPTIONS_KIND_VDE:
+ legacy.type = NET_CLIENT_DRIVER_VDE;
+ legacy.u.vde = *opts->u.vde.data;
+ break;
+ case NET_LEGACY_OPTIONS_KIND_DUMP:
+ legacy.type = NET_CLIENT_DRIVER_DUMP;
+ legacy.u.dump = *opts->u.dump.data;
+ break;
+ case NET_LEGACY_OPTIONS_KIND_BRIDGE:
+ legacy.type = NET_CLIENT_DRIVER_BRIDGE;
+ legacy.u.bridge = *opts->u.bridge.data;
+ break;
+ case NET_LEGACY_OPTIONS_KIND_NETMAP:
+ legacy.type = NET_CLIENT_DRIVER_NETMAP;
+ legacy.u.netmap = *opts->u.netmap.data;
+ break;
+ case NET_LEGACY_OPTIONS_KIND_VHOST_USER:
+ legacy.type = NET_CLIENT_DRIVER_VHOST_USER;
+ legacy.u.vhost_user = *opts->u.vhost_user.data;
+ break;
+ default:
+ abort();
}
- if (!net_client_init_fun[opts->type]) {
+ if (!net_client_init_fun[netdev->type]) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
"a net backend type (maybe it is not compiled "
"into this binary)");
@@ -1005,17 +1042,17 @@
}
/* Do not add to a vlan if it's a nic with a netdev= parameter. */
- if (opts->type != NET_CLIENT_OPTIONS_KIND_NIC ||
+ if (netdev->type != NET_CLIENT_DRIVER_NIC ||
!opts->u.nic.data->has_netdev) {
peer = net_hub_add_port(net->has_vlan ? net->vlan : 0, NULL);
}
}
- if (net_client_init_fun[opts->type](netdev, name, peer, errp) < 0) {
+ if (net_client_init_fun[netdev->type](netdev, name, peer, errp) < 0) {
/* FIXME drop when all init functions store an Error */
if (errp && !*errp) {
error_setg(errp, QERR_DEVICE_INIT_FAILED,
- NetClientOptionsKind_lookup[opts->type]);
+ NetClientDriver_lookup[netdev->type]);
}
return -1;
}
@@ -1135,7 +1172,7 @@
device, vlan_id);
return;
}
- if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ if (nc->info->type == NET_CLIENT_DRIVER_NIC) {
error_report("invalid host network device '%s'", device);
return;
}
@@ -1226,7 +1263,7 @@
monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
nc->queue_index,
- NetClientOptionsKind_lookup[nc->info->type],
+ NetClientDriver_lookup[nc->info->type],
nc->info_str);
if (!QTAILQ_EMPTY(&nc->filters)) {
monitor_printf(mon, "filters:\n");
@@ -1256,7 +1293,7 @@
}
/* only query rx-filter information of NIC */
- if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) {
+ if (nc->info->type != NET_CLIENT_DRIVER_NIC) {
if (has_name) {
error_setg(errp, "net client(%s) isn't a NIC", name);
return NULL;
@@ -1302,7 +1339,7 @@
void hmp_info_network(Monitor *mon, const QDict *qdict)
{
NetClientState *nc, *peer;
- NetClientOptionsKind type;
+ NetClientDriver type;
net_hub_info(mon);
@@ -1315,10 +1352,10 @@
continue;
}
- if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ if (!peer || type == NET_CLIENT_DRIVER_NIC) {
print_net_client(mon, nc);
} /* else it's a netdev connected to a NIC, printed with the NIC */
- if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ if (peer && type == NET_CLIENT_DRIVER_NIC) {
monitor_printf(mon, " \\ ");
print_net_client(mon, peer);
}
@@ -1332,7 +1369,7 @@
int queues, i;
queues = qemu_find_net_clients_except(name, ncs,
- NET_CLIENT_OPTIONS_KIND__MAX,
+ NET_CLIENT_DRIVER__MAX,
MAX_QUEUE_NUM);
if (queues == 0) {
@@ -1359,7 +1396,7 @@
* multiple clients that can still communicate with each other in
* disconnected mode. For now maintain this compatibility.
*/
- if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ if (nc->peer->info->type == NET_CLIENT_DRIVER_NIC) {
for (i = 0; i < queues; i++) {
ncs[i]->peer->link_down = !up;
}
@@ -1400,7 +1437,7 @@
*/
while (!QTAILQ_EMPTY(&net_clients)) {
nc = QTAILQ_FIRST(&net_clients);
- if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ if (nc->info->type == NET_CLIENT_DRIVER_NIC) {
qemu_del_nic(qemu_get_nic(nc));
} else {
qemu_del_net_client(nc);
@@ -1420,7 +1457,7 @@
QTAILQ_FOREACH(nc, &net_clients, next) {
if (!nc->peer) {
fprintf(stderr, "Warning: %s %s has no peer\n",
- nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ?
+ nc->info->type == NET_CLIENT_DRIVER_NIC ?
"nic" : "netdev", nc->name);
}
}