SIOCSVH, SIOCGVH ioctl(2) and virtio ethernet driver

[Gleb Smirnoff]

On Mon, Mar 16, 2015 at 02:49:58AM +0300, Oleg Ginzburg wrote:
O> b) On FreeBSD-current r276500M CARP IP is established for some seconds, then 
O> vanishes:
O> 
O> % /sbin/ifconfig vtnet0 vhid 1 advskew 100 pass navuhodonosor 192.168.1.210/24 
O> state master alias
O> % ifconfig vtnet0
O> vtnet0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 
O> 1500
O>         options=80028<VLAN_MTU,JUMBO_MTU,LINKSTATE>
O>         ether 00:a0:98:d7:e3:65
O>         inet 192.168.1.170 netmask 0xffffff00 broadcast 192.168.1.255 
O>         inet 192.168.1.210 netmask 0xffffff00 broadcast 192.168.1.255 vhid 1 
O>         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
O>         media: Ethernet 10Gbase-T <full-duplex>
O>         status: active
O>         carp: BACKUP vhid 1 advbase 1 advskew 100
O> 
O> % ifconfig vtnet0
O> vtnet0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 
O> 1500
O>         options=80028<VLAN_MTU,JUMBO_MTU,LINKSTATE>
O>         ether 00:a0:98:d7:e3:65
O>         inet 192.168.1.170 netmask 0xffffff00 broadcast 192.168.1.255 
O>         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
O>         media: Ethernet 10Gbase-T <full-duplex>
O>         status: active
O> 
O> % dmesg
O> ...
O> carp_alloc_if: ifpromisc(vtnet0) failed: 45
O> carp: VHID 1 at vtnet0: INIT -> BACKUP
O> carp: VHID 1 at vtnet0: BACKUP -> MASTER (master down)
O> ifa_del_loopback_route: deletion failed: 3
O> ifa_del_loopback_route: deletion failed: 3
O> 
O> 
O> And one more dmesg from the server with more fresher revision (r280012M):
O> 
O> carp_alloc_if: ifpromisc(vtnet0) failed: 45
O> carp: 1 at vtnet0: INIT -> BACKUP (initialization complete)
O> carp: 1 at vtnet0: BACKUP -> MASTER (master timed out)

In my case on r280167, all works okay, despite the carp_alloc_if warning:

#/sbin/ifconfig vtnet0 vhid 1 advskew 100 pass navuhodonosor 192.168.1.210/24 state master alias
#dmesg | tail -n 3
carp_alloc_if: ifpromisc(vtnet0) failed: 45
carp: 1 at vtnet0: INIT -> BACKUP (initialization complete)
carp: 1 at vtnet0: BACKUP -> MASTER (master timed out)
#ifconfig vtnet0
vtnet0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=80028<VLAN_MTU,JUMBO_MTU,LINKSTATE>
        ether 00:a0:98:83:f4:f1
        inet 10.6.6.9 netmask 0xfffffffe broadcast 255.255.255.255 
        inet 192.168.1.210 netmask 0xffffff00 broadcast 192.168.1.255 vhid 1 
        inet6 fe80::2a0:98ff:fe83:f4f1%vtnet0 prefixlen 64 scopeid 0x1 
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
        media: Ethernet 10Gbase-T <full-duplex>
        status: active
        carp: MASTER vhid 1 advbase 1 advskew 100

-- 
Totus tuus, Glebius.