On 9/13/19 10:59 AM, Daniel P. Berrangé wrote:
Since the introduction of the virNetworkPort object, the network driver has a persistent record of ports that have been created against the networks. Thus the hypervisor drivers no longer communicate to the network driver during libvirtd restart.
This change, however, meant that the connection usage counts were no longer re-initialized during a libvirtd restart. To deal with this we must iterate over all virNetworkPortDefPtr objects we have and invoke the notify callback to record the connection usage count.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org> (also tested for direct/bridge, direct/passthrough, hostdev, and normal tap-based virtual networks) There is one issue with this though - it only re-adds connections that were in the port list, while previously (before introduction of virNetworkPortDef) we had iterated through all interfaces of all active domains when libvirtd started - this would catch those interfaces that had been "lost" by the network driver when a network with active domains was destroyed and then restarted. Now that we're only iterating through the list of what the network driver knows about, we're not restoring those on libvirtd restart. Of course what we *really* want to have happen is for those connections to be restored when the *network* is restarted, not require a libvirtd restart (that wasn't done in the past because there wasn't any avenue for the network driver to get a list of domains/interfaces that *should* be connected to a particular network). I wonder if maybe we need the NetworkPort list for a network to persist in some manner when the network is destroyed...
--- src/conf/virnetworkobj.c | 33 +++++++++++++++++++++++++++++++++ src/conf/virnetworkobj.h | 9 +++++++++ src/libvirt_private.syms | 1 + src/network/bridge_driver.c | 17 +++++++++++++++++ 4 files changed, 60 insertions(+)
diff --git a/src/conf/virnetworkobj.c b/src/conf/virnetworkobj.c index d63ead7fac..ca1d598cf9 100644 --- a/src/conf/virnetworkobj.c +++ b/src/conf/virnetworkobj.c @@ -1844,6 +1844,39 @@ virNetworkObjPortListExport(virNetworkPtr net, }
+typedef struct _virNetworkObjPortListForEachData virNetworkObjPortListForEachData; +struct _virNetworkObjPortListForEachData { + virNetworkPortListIter iter; + void *opaque; + bool err; +}; + +static int +virNetworkObjPortForEachCallback(void *payload, + const void *name ATTRIBUTE_UNUSED, + void *opaque) +{ + virNetworkObjPortListForEachData *data = opaque; + + if (!data->iter(payload, data->opaque)) + data->err = true; + + return 0; +} + +int +virNetworkObjPortForEach(virNetworkObjPtr obj, + virNetworkPortListIter iter, + void *opaque) +{ + virNetworkObjPortListForEachData data = { iter, opaque, false }; + virHashForEach(obj->ports, virNetworkObjPortForEachCallback, &data); + if (data.err) + return -1; + return 0; +} + + static int virNetworkObjLoadAllPorts(virNetworkObjPtr net, const char *stateDir) diff --git a/src/conf/virnetworkobj.h b/src/conf/virnetworkobj.h index 1c28f0888c..a91b4304c6 100644 --- a/src/conf/virnetworkobj.h +++ b/src/conf/virnetworkobj.h @@ -190,6 +190,15 @@ virNetworkObjPortListExport(virNetworkPtr net, virNetworkPortPtr **ports, virNetworkPortListFilter filter);
+typedef bool +(*virNetworkPortListIter)(virNetworkPortDefPtr portdef, + void *opaque); + +int +virNetworkObjPortForEach(virNetworkObjPtr obj, + virNetworkPortListIter iter, + void *opaque); + int virNetworkObjSaveStatus(const char *statusDir, virNetworkObjPtr net, diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 7fe10d2286..37afb07e21 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -1097,6 +1097,7 @@ virNetworkObjLookupPort; virNetworkObjMacMgrAdd; virNetworkObjMacMgrDel; virNetworkObjNew; +virNetworkObjPortForEach; virNetworkObjPortListExport; virNetworkObjRemoveInactive; virNetworkObjReplacePersistentDef; diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c index 7b44184616..0fee153cb8 100644 --- a/src/network/bridge_driver.c +++ b/src/network/bridge_driver.c @@ -527,6 +527,21 @@ networkBridgeDummyNicName(const char *brname) }
+static int +networkNotifyPort(virNetworkObjPtr obj, + virNetworkPortDefPtr port); + +static bool +networkUpdatePort(virNetworkPortDefPtr port, + void *opaque) +{ + virNetworkObjPtr obj = opaque; + + networkNotifyPort(obj, port); + + return false; +} + static int networkUpdateState(virNetworkObjPtr obj, void *opaque) @@ -591,6 +606,8 @@ networkUpdateState(virNetworkObjPtr obj, goto cleanup; }
+ virNetworkObjPortForEach(obj, networkUpdatePort, obj); + /* Try and read dnsmasq/radvd pids of active networks */ if (virNetworkObjIsActive(obj) && def->ips && (def->nips > 0)) { pid_t radvdPid;