From e8917f437006686b8fa1b9e54f31d7abc0ea7e97 Mon Sep 17 00:00:00 2001 From: Vlad Buslov Date: Fri, 10 Aug 2018 20:51:43 +0300 Subject: net: sched: act_gact: remove dependency on rtnl lock Use tcf spinlock to protect gact action private state from concurrent modification during dump and init. Remove rtnl assertion that is no longer necessary. Signed-off-by: Vlad Buslov Signed-off-by: David S. Miller --- net/sched/act_gact.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'net') diff --git a/net/sched/act_gact.c b/net/sched/act_gact.c index 661b72b9147d..bfccd34a3968 100644 --- a/net/sched/act_gact.c +++ b/net/sched/act_gact.c @@ -113,7 +113,7 @@ static int tcf_gact_init(struct net *net, struct nlattr *nla, gact = to_gact(*a); - ASSERT_RTNL(); + spin_lock(&gact->tcf_lock); gact->tcf_action = parm->action; #ifdef CONFIG_GACT_PROB if (p_parm) { @@ -126,6 +126,8 @@ static int tcf_gact_init(struct net *net, struct nlattr *nla, gact->tcfg_ptype = p_parm->ptype; } #endif + spin_unlock(&gact->tcf_lock); + if (ret == ACT_P_CREATED) tcf_idr_insert(tn, *a); return ret; @@ -178,10 +180,11 @@ static int tcf_gact_dump(struct sk_buff *skb, struct tc_action *a, .index = gact->tcf_index, .refcnt = refcount_read(&gact->tcf_refcnt) - ref, .bindcnt = atomic_read(&gact->tcf_bindcnt) - bind, - .action = gact->tcf_action, }; struct tcf_t t; + spin_lock(&gact->tcf_lock); + opt.action = gact->tcf_action; if (nla_put(skb, TCA_GACT_PARMS, sizeof(opt), &opt)) goto nla_put_failure; #ifdef CONFIG_GACT_PROB @@ -199,9 +202,12 @@ static int tcf_gact_dump(struct sk_buff *skb, struct tc_action *a, tcf_tm_dump(&t, &gact->tcf_tm); if (nla_put_64bit(skb, TCA_GACT_TM, sizeof(t), &t, TCA_GACT_PAD)) goto nla_put_failure; + spin_unlock(&gact->tcf_lock); + return skb->len; nla_put_failure: + spin_unlock(&gact->tcf_lock); nlmsg_trim(skb, b); return -1; } -- cgit v1.2.3