git: inet: Recalculate the packet hash for IP encapsulation.

[Sepherosa Ziehau]

commit f461bb6ac7b62ba79a9ab3684356ec87cbd0aa7a
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Tue Nov 20 21:13:18 2018 +0800

    inet: Recalculate the packet hash for IP encapsulation.
    
    Some NICs, noticeably igb(4) and ix(4), calculate the packet hash
    based on the encapsulated IP datagram instead of the outmost header.
    
    Force packet hash recalculation using the outmost for encapsulated
    packets; this is done on the encap_input() path, which leaves enough
    room for us to utilize the NIC feature mentioned above.
    
    Reported-by: dillon@

Summary of changes:
 sys/netinet/ip_encap.c | 19 ++++++++++++++
 sys/netinet/ip_input.c | 67 ++++++++++++++++++++++++++++++++------------------
 sys/netinet/ip_var.h   |  7 ++++--
 3 files changed, 67 insertions(+), 26 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/f461bb6ac7b62ba79a9ab3684356ec87cbd0aa7a


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