From 7a096d579e8e2bd8b8ff34d5ef3093cd9bf3f13b Mon Sep 17 00:00:00 2001 From: Vlad Buslov Date: Wed, 12 Jun 2019 10:14:35 +0300 Subject: [PATCH] net: sched: ingress: set 'unlocked' flag for Qdisc ops To remove rtnl lock dependency in tc filter update API when using ingress Qdisc, set QDISC_CLASS_OPS_DOIT_UNLOCKED flag in ingress Qdisc_class_ops. Ingress Qdisc ops don't require any modifications to be used without rtnl lock on tc filter update path. Ingress implementation never changes its q->block and only releases it when Qdisc is being destroyed. This means it is enough for RTM_{NEWTFILTER|DELTFILTER|GETTFILTER} message handlers to hold ingress Qdisc reference while using it without relying on rtnl lock protection. Unlocked Qdisc ops support is already implemented in filter update path by unlocked cls API patch set. Signed-off-by: Vlad Buslov Signed-off-by: David S. Miller --- net/sched/sch_ingress.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/sched/sch_ingress.c b/net/sched/sch_ingress.c index 0f65f617756b..d5382554e281 100644 --- a/net/sched/sch_ingress.c +++ b/net/sched/sch_ingress.c @@ -114,6 +114,7 @@ nla_put_failure: } static const struct Qdisc_class_ops ingress_class_ops = { + .flags = QDISC_CLASS_OPS_DOIT_UNLOCKED, .leaf = ingress_leaf, .find = ingress_find, .walk = ingress_walk, -- 2.30.2