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netfront: wait for backend to connect before sending ARP

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Netfront has to wait for the backend to switch to state XenbusStateConnected
before sending the ARP request, or else the backend might not be connected
and thus the packet will be lost.

Sponsored by: Citrix Systems R&D
MFC after: 1 week
This commit is contained in:
Roger Pau Monné 2015-05-14 16:29:11 +00:00
parent 732b31de5d
commit dbf82bde19
1 changed files with 5 additions and 4 deletions
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9
sys/dev/xen/netfront/netfront.c
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@ -682,7 +682,6 @@ netfront_backend_changed(device_t dev, XenbusState newstate)
switch (newstate) { switch (newstate) {
case XenbusStateInitialising: case XenbusStateInitialising:
case XenbusStateInitialised: case XenbusStateInitialised:
case XenbusStateConnected:
case XenbusStateUnknown: case XenbusStateUnknown:
case XenbusStateClosed: case XenbusStateClosed:
case XenbusStateReconfigured: case XenbusStateReconfigured:
@ -694,13 +693,15 @@ netfront_backend_changed(device_t dev, XenbusState newstate)
if (network_connect(sc) != 0) if (network_connect(sc) != 0)
break; break;
xenbus_set_state(dev, XenbusStateConnected); xenbus_set_state(dev, XenbusStateConnected);
#ifdef INET
netfront_send_fake_arp(dev, sc);
#endif
break; break;
case XenbusStateClosing: case XenbusStateClosing:
xenbus_set_state(dev, XenbusStateClosed); xenbus_set_state(dev, XenbusStateClosed);
break; break;
case XenbusStateConnected:
#ifdef INET
netfront_send_fake_arp(dev, sc);
#endif
break;
} }
} }