vxlan: Support for PMTU discovery on directly bridged links

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If the interface is a bridge or Open vSwitch port, and we can't
forward a packet because it exceeds the local PMTU estimate,
trigger an ICMP or ICMPv6 reply to the sender, using the same
interface to forward it back.

If metadata collection is enabled, reverse destination and source
addresses, so that Open vSwitch is able to match this packet against
the existing, reverse flow.

v2: Use netif_is_any_bridge_port() (David Ahern)

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Stefano Brivio 2020-08-04 07:53:44 +02:00 • committed by David S. Miller

parent 4cb47a8644

commit fc68c99577

1 changed files with 41 additions and 6 deletions

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47

drivers/net/vxlan.c

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