• David Ahern's avatar
    net: nexthop uapi · 65ee00a9
    David Ahern authored
    New UAPI for nexthops as standalone objects:
    - defines netlink ancillary header, struct nhmsg
    - RTM commands for nexthop objects, RTM_*NEXTHOP,
    - RTNLGRP for nexthop notifications, RTNLGRP_NEXTHOP,
    - Attributes for creating nexthops, NHA_*
    - Attribute for route specs to specify a nexthop by id, RTA_NH_ID.
    
    The nexthop attributes and semantics follow the route and RTA ones for
    device, gateway and lwt encap. Unique to nexthop objects are a blackhole
    and a group which contains references to other nexthop objects. With the
    exception of blackhole and group, nexthop objects MUST contain a device.
    Gateway and encap are optional. Nexthop groups can only reference other
    pre-existing nexthops by id. If the NHA_ID attribute is present that id
    is used for the nexthop. If not specified, one is auto assigned.
    
    Dump requests can include attributes:
    - NHA_GROUPS to return only nexthop groups,
    - NHA_MASTER to limit dumps to nexthops with devices enslaved to the
      given master (e.g., VRF)
    - NHA_OIF to limit dumps to nexthops using given device
    
    nlmsg_route_perms in selinux code is updated for the new RTM comands.
    Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    65ee00a9
rtnetlink.h 18.6 KB