From: David S. Miller Date: Sun, 4 Mar 2018 18:04:24 +0000 (-0500) Subject: Merge branch 'net-ipv6-Add-support-for-path-selection-using-hash-of-5-tuple' X-Git-Tag: v4.19~1326^2~310 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b33cc2cec9e2e58ec5d220e26f1111117ea782d9;p=platform%2Fkernel%2Flinux-rpi3.git Merge branch 'net-ipv6-Add-support-for-path-selection-using-hash-of-5-tuple' David Ahern says: ==================== net/ipv6: Add support for path selection using hash of 5-tuple 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. This gives users a choice in hash algorithms if they believe L3 only and the IPv6 flow label are not sufficient for their use case. A separate sysctl is added for IPv6, allowing IPv4 and IPv6 to use different algorithms if desired. The first 3 patches modify the IPv4 variant so that at the end of the patch set the ipv4 and ipv6 implementations are direct parallels. Patch 4 refactors the existing rt6_multipath_hash in preparation for adding the policy option. Patch 5 renames the existing netevent to have IPv4 in the name so ipv4 changes can be distinguished from IPv6 if the netevent handler cares. Patch 6 adds the skb as an argument through the FIB lookup functions to the multipath selection. Needed for the forwarding case. Patch 7 adds the L4 hash support. Patch 8 adds the hook for the netevent to the spectrum driver to update the ASIC. Patch 9 removes no longer used code. Patch 10 adds a testcase for IPv6 multipath with L4 hash. v3 - comments from Ido: - removed fib_info arg in patch 1; left by mistake on rebase to net-next - removed __get_hash_from_flowi4 declaration - line wrap change to spectrum_router.c to maintain 80 chars v2 - rebased to top of tree - added refactor of fib_multipath_hash following recent change - plumb skb through lookup functions to multipath selection - fix sysctl setting; was missing the data set in ipv6_sysctl_net_init - added test case RFC to v1: - rebase to top of net-next - fix addr_type in hash_keys and removed flow label as noticed by Ido - added a comment to cover letter about choice in algorithms based on use case per Or's comments ==================== Signed-off-by: David S. Miller --- b33cc2cec9e2e58ec5d220e26f1111117ea782d9