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H A D | macvlan.c | diff 59f997b088d26a774958cb7b17b0763cd82de7ec Fri Nov 30 17:26:27 CST 2018 Matteo Croce <mcroce@redhat.com> macvlan: return correct error value
A MAC address must be unique among all the macvlan devices with the same lower device. The only exception is the passthru [sic] mode, which shares the lower device address.
When duplicate addresses are detected, EBUSY is returned when bringing the interface up:
# ip link add macvlan0 link eth0 type macvlan # read addr </sys/class/net/eth0/address # ip link set macvlan0 address $addr # ip link set macvlan0 up RTNETLINK answers: Device or resource busy
Use correct error code which is EADDRINUSE, and do the check also earlier, on address change:
# ip link set macvlan0 address $addr RTNETLINK answers: Address already in use
Signed-off-by: Matteo Croce <mcroce@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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