From: Paolo Abeni <pab...@redhat.com>
Date: Wed, 28 Feb 2018 10:59:27 +0100
> This changeset moves ipvlan address under RCU protection, using
> a per ipvlan device spinlock to protect list mutation and RCU
> read access to protect list traversal.
>
> Also explicitly use RCU read lock to traverse the per port
> ipvlans list, so that we can now perform a full address lookup
> without asserting the RTNL lock.
>
> Overall this allows the ipvlan driver to check fully for duplicate
> addresses - before this commit ipv6 addresses assigned by autoconf
> via prefix delegation where accepted without any check - and avoid
> the following rntl assertion failure still in the same code path:
...
> v1 -> v2: drop unneeded in_softirq check in ipvlan_addr6_validator_event()
>
> Fixes: e9997c2938b2 ("ipvlan: fix check for IP addresses in control path")
> Signed-off-by: Paolo Abeni <pab...@redhat.com>
Nice work, thanks for tackling this locking problem.
Applied.
