Commit a5e74021 authored by Sven Eckelmann's avatar Sven Eckelmann Committed by Jakub Kicinski
Browse files

vxlan: Copy needed_tailroom from lowerdev 



While vxlan doesn't need any extra tailroom, the lowerdev might need it. In
that case, copy it over to reduce the chance for additional (re)allocations
in the transmit path.

Signed-off-by: default avatarSven Eckelmann <sven@narfation.org>
Link: https://lore.kernel.org/r/20201126125247.1047977-2-sven@narfation.org


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 0a35dc41

drivers/net/vxlan.c

+2 −0
Original line number Diff line number Diff line
@@ -3800,6 +3800,8 @@ static void vxlan_config_apply(struct net_device *dev, 
		needed_headroom = lowerdev->hard_header_len;

		needed_headroom += lowerdev->needed_headroom;



		dev->needed_tailroom = lowerdev->needed_tailroom;



		max_mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM :

					   VXLAN_HEADROOM);

		if (max_mtu < ETH_MIN_MTU)