• David Ahern's avatar
    net: ipv6: Change notifications for multipath add to RTA_MULTIPATH · 3b1137fe
    David Ahern authored
    Change ip6_route_multipath_add to send one notifciation with the full
    route encoded with RTA_MULTIPATH instead of a series of individual routes.
    This is done by adding a skip_notify flag to the nl_info struct. The
    flag is used to skip sending of the notification in the fib code that
    actually inserts the route. Once the full route has been added, a
    notification is generated with all nexthops.
    
    ip6_route_multipath_add handles 3 use cases: new routes, route replace,
    and route append. The multipath notification generated needs to be
    consistent with the order of the nexthops and it should be consistent
    with the order in a FIB dump which means the route with the first nexthop
    needs to be used as the route reference. For the first 2 cases (new and
    replace), a reference to the route used to send the notification is
    obtained by saving the first route added. For the append case, the last
    route added is used to loop back to its first sibling route which is
    the first nexthop in the multipath route.
    Signed-off-by: default avatarDavid Ahern <dsa@cumulusnetworks.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    3b1137fe
ip6_fib.c 45.7 KB