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net: sched: flower: set unlocked flag for flower proto ops 

Set TCF_PROTO_OPS_DOIT_UNLOCKED for flower classifier to indicate that its
ops callbacks don't require caller to hold rtnl lock. Don't take rtnl lock
in fl_destroy_filter_work() that is executed on workqueue instead of being
called by cls API and is not affected by setting
TCF_PROTO_OPS_DOIT_UNLOCKED. Rtnl mutex is still manually taken by flower
classifier before calling hardware offloads API that has not been updated
for unlocked execution.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Buslov 2019-03-21 15:17:44 +02:00 committed by David S. Miller
parent c24e43d83b
commit 9214919006
1 changed files with 1 additions and 2 deletions
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3
net/sched/cls_flower.c
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@ -368,9 +368,7 @@ static void fl_destroy_filter_work(struct work_struct *work)
struct cls_fl_filter *f = container_of(to_rcu_work(work),
struct cls_fl_filter, rwork);
rtnl_lock();
__fl_destroy_filter(f);
rtnl_unlock();
}
static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
@ -2372,6 +2370,7 @@ static struct tcf_proto_ops cls_fl_ops __read_mostly = {
.tmplt_destroy = fl_tmplt_destroy,
.tmplt_dump = fl_tmplt_dump,
.owner = THIS_MODULE,
.flags = TCF_PROTO_OPS_DOIT_UNLOCKED,
};
static int __init cls_fl_init(void)