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| author | Yossi Kuperman <yossiku@mellanox.com> | 2017-08-30 11:30:39 +0300 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2017-08-31 10:04:03 +0300 |
| commit | 47ebcc0bb1d5eb7f1b1eeab675409ea7f67b4a5c (patch) | |
| tree | 1718a09f7321053903a758a82b0101595113cad0 /include/net/xfrm.h | |
| parent | acfb98b99647aa7dc7c111db52d5f4199d2b641f (diff) | |
| download | linux-47ebcc0bb1d5eb7f1b1eeab675409ea7f67b4a5c.tar.xz | |
xfrm: Add support for network devices capable of removing the ESP trailer
In conjunction with crypto offload [1], removing the ESP trailer by
hardware can potentially improve the performance by avoiding (1) a
cache miss incurred by reading the nexthdr field and (2) the necessity
to calculate the csum value of the trailer in order to keep skb->csum
valid.
This patch introduces the changes to the xfrm stack and merely serves
as an infrastructure. Subsequent patch to mlx5 driver will put this to
a good use.
[1] https://www.mail-archive.com/netdev@vger.kernel.org/msg175733.html
Signed-off-by: Yossi Kuperman <yossiku@mellanox.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'include/net/xfrm.h')
| -rw-r--r-- | include/net/xfrm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 9c7b70cce6d6..f002a2c5e33c 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -1019,6 +1019,7 @@ struct xfrm_offload { #define CRYPTO_FALLBACK 8 #define XFRM_GSO_SEGMENT 16 #define XFRM_GRO 32 +#define XFRM_ESP_NO_TRAILER 64 __u32 status; #define CRYPTO_SUCCESS 1 |