Hardware supports multipath selection using the standard L4 5-tuple
instead of just L3 and the flow label. In addition, some network
operators prefer IPv6 path selection to use the 5-tuple. To that end,
add support to IPv6 for multipath hash policy similar to
bf4e0a3db97eb ("net: ipv4: add support for ECMP hash policy choice").
The default is still L3 which covers source and destination addresses
along with flow label and IPv6 protocol.A separate sysctl is added for IPv6, allowing IPv4 and IPv6 to use different algorithms if desired. The first 2 patches modify the IPv4 variant so that at the end of the patch set the ipv4 and ipv6 implementations are direct parallels. Patch 3 refactors the existing rt6_multipath_hash in preparation for adding the policy option. Patch 4 renames the existing netevent to have IPv4 in the name so ipv4 changes can be distinguished from IPv6 if the netevent handler cares. Patch 5 adds the L4 hash support. Patch 6 adds the hook for the netevent to the spectrum driver to update the ASIC. Patch 7 removes no longer used code. David Ahern (7): net/ipv4: Pass net to fib_multipath_hash instead of fib_info net: Align ip_multipath_l3_keys and ip6_multipath_l3_keys net/ipv6: Make rt6_multipath_hash similar to fib_multipath_hash net: Rename NETEVENT_MULTIPATH_HASH_UPDATE net/ipv6: Add support for path selection using hash of 5-tuple mlxsw: spectrum_router: Add support for ipv6 hash policy update net: Remove unused get_hash_from_flow functions Documentation/networking/ip-sysctl.txt | 7 +++ .../net/ethernet/mellanox/mlxsw/spectrum_router.c | 13 ++++- include/net/flow.h | 15 ----- include/net/ip6_route.h | 3 +- include/net/ip_fib.h | 2 +- include/net/netevent.h | 3 +- include/net/netns/ipv6.h | 1 + net/core/flow_dissector.c | 16 ------ net/ipv4/fib_semantics.c | 2 +- net/ipv4/route.c | 25 +++++---- net/ipv4/sysctl_net_ipv4.c | 2 +- net/ipv6/icmp.c | 2 +- net/ipv6/route.c | 64 ++++++++++++++++++---- net/ipv6/sysctl_net_ipv6.c | 26 +++++++++ 14 files changed, 118 insertions(+), 63 deletions(-) -- 2.11.0
