From: Nicolas Dichtel <nicolas.dich...@6wind.com>
Date: Thu, 28 Mar 2019 10:35:06 +0100
> It returned always NULL, thus it was never possible to get the filter.
>
> Example:
> $ ip link add foo type dummy
> $ ip link add bar type dummy
> $ tc qdisc add dev foo clsact
> $ tc filter add dev foo protocol all pref 1 ingress handle 1234 \
> matchall action mirred ingress mirror dev bar
>
> Before the patch:
> $ tc filter get dev foo protocol all pref 1 ingress handle 1234 matchall
> Error: Specified filter handle not found.
> We have an error talking to the kernel
>
> After:
> $ tc filter get dev foo protocol all pref 1 ingress handle 1234 matchall
> filter ingress protocol all pref 1 matchall chain 0 handle 0x4d2
> not_in_hw
> action order 1: mirred (Ingress Mirror to device bar) pipe
> index 1 ref 1 bind 1
>
> CC: Yotam Gigi <yot...@mellanox.com>
> CC: Jiri Pirko <j...@mellanox.com>
> Fixes: fd62d9f5c575 ("net/sched: matchall: Fix configuration race")
> Signed-off-by: Nicolas Dichtel <nicolas.dich...@6wind.com>
I'll apply this and queue it up for -stable, but we really should add
a testcase to selftests for this if we don't have one already.
