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lxc, libxl: notify network driver of NICs during reconnect

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When starting up it is important to notify the network driver of any
NICs which are used by running guests so that it can account for any
resources they are using.

Reviewed-by: Laine Stump <laine@laine.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2019-02-01 17:11:22 +00:00
parent 4a998fb824
commit 729a06c41a
2 changed files with 60 additions and 0 deletions
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30
src/libxl/libxl_driver.c
View File

@ -352,6 +352,34 @@ libxlAutostartDomain(virDomainObjPtr vm,
return ret;
}
static void
libxlReconnectNotifyNets(virDomainDefPtr def)
{
size_t i;
virConnectPtr conn = NULL;
for (i = 0; i < def->nnets; i++) {
virDomainNetDefPtr net = def->nets[i];
/* keep others from trying to use the macvtap device name, but
* don't return error if this happens, since that causes the
* domain to be unceremoniously killed, which would be *very*
* impolite.
*/
if (virDomainNetGetActualType(net) == VIR_DOMAIN_NET_TYPE_DIRECT)
ignore_value(virNetDevMacVLanReserveName(net->ifname, false));
if (net->type == VIR_DOMAIN_NET_TYPE_NETWORK) {
if (!conn && !(conn = virGetConnectNetwork()))
continue;
virDomainNetNotifyActualDevice(conn, def, net);
}
}
virObjectUnref(conn);
}
/*
* Reconnect to running domains that were previously started/created
* with libxenlight driver.
@ -424,6 +452,8 @@ libxlReconnectDomain(virDomainObjPtr vm,
/* Enable domain death events */
libxl_evenable_domain_death(cfg->ctx, vm->def->id, 0, &priv->deathW);
libxlReconnectNotifyNets(vm->def);
/* now that we know it's reconnected call the hook if present */
if (virHookPresent(VIR_HOOK_DRIVER_LIBXL) &&
STRNEQ("Domain-0", vm->def->name)) {

30
src/lxc/lxc_process.c
View File

@ -1646,6 +1646,34 @@ virLXCProcessAutostartAll(virLXCDriverPtr driver)
virObjectUnref(conn);
}
static void
virLXCProcessReconnectNotifyNets(virDomainDefPtr def)
{
size_t i;
virConnectPtr conn = NULL;
for (i = 0; i < def->nnets; i++) {
virDomainNetDefPtr net = def->nets[i];
/* keep others from trying to use the macvtap device name, but
* don't return error if this happens, since that causes the
* domain to be unceremoniously killed, which would be *very*
* impolite.
*/
if (virDomainNetGetActualType(net) == VIR_DOMAIN_NET_TYPE_DIRECT)
ignore_value(virNetDevMacVLanReserveName(net->ifname, false));
if (net->type == VIR_DOMAIN_NET_TYPE_NETWORK) {
if (!conn && !(conn = virGetConnectNetwork()))
continue;
virDomainNetNotifyActualDevice(conn, def, net);
}
}
virObjectUnref(conn);
}
static int
virLXCProcessReconnectDomain(virDomainObjPtr vm,
void *opaque)
@ -1692,6 +1720,8 @@ virLXCProcessReconnectDomain(virDomainObjPtr vm,
vm->def, vm->pid) < 0)
goto error;
virLXCProcessReconnectNotifyNets(vm->def);
/* now that we know it's reconnected call the hook if present */
if (virHookPresent(VIR_HOOK_DRIVER_LXC)) {
char *xml = virDomainDefFormat(vm->def, driver->caps, 0);