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authorTom Herbert <therbert@google.com>2014-06-15 10:24:03 +0400
committerDavid S. Miller <davem@davemloft.net>2014-06-15 12:00:49 +0400
commit46fb51eb96cafb2c148b7b5119adb5e31a2bf3c4 (patch)
tree8deefff573270378b056f6f0915068a33578b2ad /net/sched/sch_generic.c
parent4b28252cada3d0521ab59751f4240ecdfb9bba18 (diff)
downloadlinux-46fb51eb96cafb2c148b7b5119adb5e31a2bf3c4.tar.xz
net: Fix save software checksum complete
Geert reported issues regarding checksum complete and UDP. The logic introduced in commit 7e3cead5172927732f51fde ("net: Save software checksum complete") is not correct. This patch: 1) Restores code in __skb_checksum_complete_header except for setting CHECKSUM_UNNECESSARY. This function may be calculating checksum on something less than skb->len. 2) Adds saving checksum to __skb_checksum_complete. The full packet checksum 0..skb->len is calculated without adding in pseudo header. This value is saved in skb->csum and then the pseudo header is added to that to derive the checksum for validation. 3) In both __skb_checksum_complete_header and __skb_checksum_complete, set skb->csum_valid to whether checksum of zero was computed. This allows skb_csum_unnecessary to return true without changing to CHECKSUM_UNNECESSARY which was done previously. 4) Copy new csum related bits in __copy_skb_header. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_generic.c')
0 files changed, 0 insertions, 0 deletions