From: David S. Miller Date: Mon, 14 Mar 2016 03:55:14 +0000 (-0400) Subject: Merge branch 'ipv4-ipv6-csums' X-Git-Tag: v4.6-rc1~91^2~62 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=20db778e51d569e8260c40e06473a639d6d01393;p=platform%2Fkernel%2Flinux-exynos.git Merge branch 'ipv4-ipv6-csums' Alexander Duyck says: ==================== Fix differences between IPv4 and IPv6 TCP/UDP checksum calculation This patch series is meant to address the differences that exist between IPv4 and IPv6 in terms of checksum calculation. Specifically the IPv6 function csum_ipv6_magic treated length as a value that could be greater than 64K, while csum_tcpudp_magic was truncating the length at 16 bits. After looking over the code and giving it some thought I decided it would be best to update the IPv4 function so that it worked the same way the IPv6 one did. This allows us to get the same results given the same inputs for both functions. As a result we can use the same processes to reverse the calculation in the event we need to do something like remove the length of the pseudo-header checksum. I also took the opportunity to standardize things so that the parameters for these functions all use the correct types. IPv4 addresses are __be32, length should always be __u32, and protocol is a __u8. With this change in place it corrects an issue with UDP tunnels in which we were getting a checksum that was off by 1 when performing fragmentation on inner UDP packets. ==================== Signed-off-by: David S. Miller --- 20db778e51d569e8260c40e06473a639d6d01393