veth might gain gso support.
---------- Forwarded message ---------- From: Stephen Hemminger <[email protected]> Date: Fri, Dec 1, 2017 at 12:11 PM Subject: [PATCH net-next 2/2] veth: allow configuring GSO maximums To: [email protected] Cc: [email protected], Stephen Hemminger <[email protected]> Veth's can be used in environments (like Azure) where the underlying network device is impacted by large GSO packets. This patch allows gso maximum values to be passed in when creating the device via netlink. In theory, other pseudo devices could also use netlink attributes to set GSO maximums but for now veth is what has been observed to be an issue. Signed-off-by: Stephen Hemminger <[email protected]> --- drivers/net/veth.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/net/veth.c b/drivers/net/veth.c index f5438d0978ca..510c058ba227 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -410,6 +410,26 @@ static int veth_newlink(struct net *src_net, struct net_device *dev, if (ifmp && (dev->ifindex != 0)) peer->ifindex = ifmp->ifi_index; + if (tbp[IFLA_GSO_MAX_SIZE]) { + u32 max_size = nla_get_u32(tbp[IFLA_GSO_MAX_SIZE]); + + if (max_size > GSO_MAX_SIZE) + return -EINVAL; + + peer->gso_max_size = max_size; + dev->gso_max_size = max_size; + } + + if (tbp[IFLA_GSO_MAX_SEGS]) { + u32 max_segs = nla_get_u32(tbp[IFLA_GSO_MAX_SEGS]); + + if (max_segs > GSO_MAX_SEGS) + return -EINVAL; + + peer->gso_max_segs = max_segs; + dev->gso_max_segs = max_segs; + } + err = register_netdevice(peer); put_net(net); net = NULL; -- 2.11.0 -- Dave Täht CEO, TekLibre, LLC http://www.teklibre.com Tel: 1-669-226-2619 _______________________________________________ Cake mailing list [email protected] https://lists.bufferbloat.net/listinfo/cake
