netdev - [PATCH RFC net-next 2/7] net: Move call_fib_rule_notifiers up in fib_nl

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Date:   Thu, 22 Mar 2018 15:57:52 -0700
From:   David Ahern <dsa@...ulusnetworks.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, roopa@...ulusnetworks.com,
        shm@...ulusnetworks.com, jiri@...lanox.com, idosch@...lanox.com,
        jakub.kicinski@...ronome.com, David Ahern <dsa@...ulusnetworks.com>
Subject: [PATCH RFC net-next 2/7] net: Move call_fib_rule_notifiers up in fib_nl_newrule

Move call_fib_rule_notifiers up in fib_nl_newrule to the point right
before the rule is inserted into the list. At this point there are no
more failure paths within the core rule code, so if the notifier
does not fail then the rule will be inserted into the list.

Signed-off-by: David Ahern <dsa@...ulusnetworks.com>
---
 net/core/fib_rules.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index f6f04fc0f629..84c427a0c984 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -631,6 +631,11 @@ int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
 	if (err < 0)
 		goto errout_free;
 
+	err = call_fib_rule_notifiers(net, FIB_EVENT_RULE_ADD, rule, ops,
+				      extack);
+	if (err < 0)
+		goto errout_free;
+
 	list_for_each_entry(r, &ops->rules_list, list) {
 		if (r->pref > rule->pref)
 			break;
@@ -667,7 +672,6 @@ int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
 	if (rule->tun_id)
 		ip_tunnel_need_metadata();
 
-	call_fib_rule_notifiers(net, FIB_EVENT_RULE_ADD, rule, ops, extack);
 	notify_rule_change(RTM_NEWRULE, rule, ops, nlh, NETLINK_CB(skb).portid);
 	flush_route_cache(ops);
 	rules_ops_put(ops);
-- 
2.11.0