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    Subject[PATCH AUTOSEL for 4.15 085/102] veth: set peer GSO values
    Date
    From: Stephen Hemminger <stephen@networkplumber.org>

    [ Upstream commit 72d24955b44a4039db54a1c252b5031969eeaac3 ]

    When new veth is created, and GSO values have been configured
    on one device, clone those values to the peer.

    For example:
    # ip link add dev vm1 gso_max_size 65530 type veth peer name vm2

    This should create vm1 <--> vm2 with both having GSO maximum
    size set to 65530.

    Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    ---
    drivers/net/veth.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/drivers/net/veth.c b/drivers/net/veth.c
    index f5438d0978ca..a69ad39ee57e 100644
    --- a/drivers/net/veth.c
    +++ b/drivers/net/veth.c
    @@ -410,6 +410,9 @@ static int veth_newlink(struct net *src_net, struct net_device *dev,
    if (ifmp && (dev->ifindex != 0))
    peer->ifindex = ifmp->ifi_index;

    + peer->gso_max_size = dev->gso_max_size;
    + peer->gso_max_segs = dev->gso_max_segs;
    +
    err = register_netdevice(peer);
    put_net(net);
    net = NULL;
    --
    2.14.1
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