]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
neigh: Better handling of transition to NUD_PROBE state
authorErik Kline <ek@google.com>
Mon, 18 May 2015 10:44:41 +0000 (19:44 +0900)
committerDavid S. Miller <davem@davemloft.net>
Thu, 21 May 2015 20:52:17 +0000 (16:52 -0400)
commit765c9c639fbb132af0cafc6e1da22fe6cea26bb8
tree3a197a9708a23ffafcee827225366c8f3ecbbe49
parent06b2c61c92a9942769ee8da22d3ce8b8b935c038
neigh: Better handling of transition to NUD_PROBE state

[1] When entering NUD_PROBE state via neigh_update(), perhaps received
    from userspace, correctly (re)initialize the probes count to zero.

    This is useful for forcing revalidation of a neighbor (for example
    if the host is attempting to do DNA [IPv4 4436, IPv6 6059]).

[2] Notify listeners when a neighbor goes into NUD_PROBE state.

    By sending notifications on entry to NUD_PROBE state listeners get
    more timely warnings of imminent connectivity issues.

    The current notifications on entry to NUD_STALE have somewhat
    limited usefulness: NUD_STALE is a perfectly normal state, as is
    NUD_DELAY, whereas notifications on entry to NUD_FAILURE come after
    a neighbor reachability problem has been confirmed (typically after
    three probes).

Signed-off-by: Erik Kline <ek@google.com>
Acked-By: Lorenzo Colitti <lorenzo@google.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/neighbour.c