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| author |   Tom Herbert <therbert@google.com> | 2014-08-27 21:26:56 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-08-29 20:41:11 -0700 |
| commit | 662880f4420340aad4f9a62a349c6c9d4faa1a5d (patch) | |
| tree | d62876eeef140de3256a22f0632571dc00c9745c /net/sctp/input.c | |
| parent | net: Clarification of CHECKSUM_UNNECESSARY (diff) | |
| download | linux-dev-662880f4420340aad4f9a62a349c6c9d4faa1a5d.tar.xz linux-dev-662880f4420340aad4f9a62a349c6c9d4faa1a5d.zip | |
net: Allow GRO to use and set levels of checksum unnecessary
Allow GRO path to "consume" checksums provided in CHECKSUM_UNNECESSARY
and to report new checksums verfied for use in fallback to normal
path.
Change GRO checksum path to track csum_level using a csum_cnt field
in NAPI_GRO_CB. On GRO initialization, if ip_summed is
CHECKSUM_UNNECESSARY set NAPI_GRO_CB(skb)->csum_cnt to
skb->csum_level + 1. For each checksum verified, decrement
NAPI_GRO_CB(skb)->csum_cnt while its greater than zero. If a checksum
is verfied and NAPI_GRO_CB(skb)->csum_cnt == 0, we have verified a
deeper checksum than originally indicated in skbuf so increment
csum_level (or initialize to CHECKSUM_UNNECESSARY if ip_summed is
CHECKSUM_NONE or CHECKSUM_COMPLETE).
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions