diff options
| author | Alexander Duyck <aduyck@mirantis.com> | 2016-04-05 09:13:39 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-10 10:25:53 +0200 |
| commit | 21fbc1a1334af28f513de03db3ff970b970abd7c (patch) | |
| tree | df4b1c7ee94a2edae068e26dfc66ebb7eeb9dfce /include | |
| parent | 96edfba59c27f0454ac6da080245dff1d996e986 (diff) | |
GRE: Disable segmentation offloads w/ CSUM and we are encapsulated via FOU
commit a0ca153f98db8cf25298565a09e11fe9d82846ad upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -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 d999e503ba8a..c1a42027ee0e 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2013,7 +2013,10 @@ struct napi_gro_cb { /* Number of gro_receive callbacks this packet already went through */ u8 recursion_counter:4; - /* 3 bit hole */ + /* Used in GRE, set in fou/gue_gro_receive */ + u8 is_fou:1; + + /* 2 bit hole */ /* used to support CHECKSUM_COMPLETE for tunneling protocols */ __wsum csum; |