• Krister Johansen's avatar
    Ipvlan should return an error when an address is already in use. · 3ad7d246
    Krister Johansen authored
    The ipvlan code already knows how to detect when a duplicate address is
    about to be assigned to an ipvlan device.  However, that failure is not
    propogated outward and leads to a silent failure.
    
    Introduce a validation step at ip address creation time and allow device
    drivers to register to validate the incoming ip addresses.  The ipvlan
    code is the first consumer.  If it detects an address in use, we can
    return an error to the user before beginning to commit the new ifa in
    the networking code.
    
    This can be especially useful if it is necessary to provision many
    ipvlans in containers.  The provisioning software (or operator) can use
    this to detect situations where an ip address is unexpectedly in use.
    Signed-off-by: default avatarKrister Johansen <kjlx@templeofstupid.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    3ad7d246
addrconf_core.c 5.99 KB