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wireguard: device: support big tcp GSO

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Advertise GSO_MAX_SIZE as TSO max size in order support BIG TCP for wireguard.
This helps to improve wireguard performance a bit when enabled as it allows
wireguard to aggregate larger skbs in wg_packet_consume_data_done() via
napi_gro_receive(), but also allows the stack to build larger skbs on xmit
where the driver then segments them before encryption inside wg_xmit().
We've seen a 15% improvement in TCP stream performance.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Link: https://patch.msgid.link/20241117212030.629159-5-Jason@zx2c4.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Daniel Borkmann 2024-11-17 22:20:30 +01:00 committed by Jakub Kicinski
parent 0290abc986
commit 06a34f7db7
1 changed files with 2 additions and 0 deletions
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drivers/net/wireguard/device.c
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@ -302,6 +302,8 @@ static void wg_setup(struct net_device *dev)
/* We need to keep the dst around in case of icmp replies. */
netif_keep_dst(dev);
netif_set_tso_max_size(dev, GSO_MAX_SIZE);
wg->dev = dev;
}