diff options
| author | Alexander Duyck <aduyck@mirantis.com> | 2016-04-05 19:13:39 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-07 23:56:33 +0300 |
| commit | a0ca153f98db8cf25298565a09e11fe9d82846ad (patch) | |
| tree | 5f7773cd6e2dbf30f3af97194a8b7d04b99fd1a0 /include/linux | |
| parent | 0a1a37b6d62e6864a77a82e925217c720f91f963 (diff) | |
| download | linux-a0ca153f98db8cf25298565a09e11fe9d82846ad.tar.xz | |
GRE: Disable segmentation offloads w/ CSUM and we are encapsulated via FOU
This patch fixes an issue I found in which we were dropping frames if we
had enabled checksums on GRE headers that were encapsulated by either FOU
or GUE. Without this patch I was barely able to get 1 Gb/s of throughput.
With this patch applied I am now at least getting around 6 Gb/s.
The issue is due to the fact that with FOU or GUE applied we do not provide
a transport offset pointing to the GRE header, nor do we offload it in
software as the GRE header is completely skipped by GSO and treated like a
VXLAN or GENEVE type header. As such we need to prevent the stack from
generating it and also prevent GRE from generating it via any interface we
create.
Fixes: c3483384ee511 ("gro: Allow tunnel stacking in the case of FOU/GUE")
Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/netdevice.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index cb0d5d09c2e4..8395308a2445 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2120,7 +2120,10 @@ struct napi_gro_cb { /* Used in foo-over-udp, set in udp[46]_gro_receive */ u8 is_ipv6:1; - /* 7 bit hole */ + /* Used in GRE, set in fou/gue_gro_receive */ + u8 is_fou:1; + + /* 6 bit hole */ /* used to support CHECKSUM_COMPLETE for tunneling protocols */ __wsum csum; |