From: Sabrina Dubroca
Date: Fri, 16 Nov 2018 16:58:19 +0100
> The various types of tunnels running over IPv4 can ask to set the DF
> bit to do PMTU discovery. However, PMTU discovery is subject to the
> threshold set by the net.ipv4.route.min_pmtu sysctl, and is also
> disabled on routes with "mt
The various types of tunnels running over IPv4 can ask to set the DF
bit to do PMTU discovery. However, PMTU discovery is subject to the
threshold set by the net.ipv4.route.min_pmtu sysctl, and is also
disabled on routes with "mtu lock". In those cases, we shouldn't set
the DF bit.
This patch make
