netdev - [net-next] net: fib_rules: do not flow dissect local packets

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Date:   Fri,  5 Jul 2019 11:46:43 -0700
From:   Petar Penkov <ppenkov@...gle.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, roopa@...ulusnetworks.com,
        edumazet@...gle.com, Petar Penkov <ppenkov@...gle.com>
Subject: [net-next] net: fib_rules: do not flow dissect local packets

Rules matching on loopback iif do not need early flow dissection as the
packet originates from the host. Stop counting such rules in
fib_rule_requires_fldissect

Signed-off-by: Petar Penkov <ppenkov@...gle.com>
---
 include/net/fib_rules.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h
index eba8465e1d86..20dcadd8eed9 100644
--- a/include/net/fib_rules.h
+++ b/include/net/fib_rules.h
@@ -180,9 +180,9 @@ static inline bool fib_rule_port_range_compare(struct fib_rule_port_range *a,
 
 static inline bool fib_rule_requires_fldissect(struct fib_rule *rule)
 {
-	return rule->ip_proto ||
+	return rule->iifindex != LOOPBACK_IFINDEX && (rule->ip_proto ||
 		fib_rule_port_range_set(&rule->sport_range) ||
-		fib_rule_port_range_set(&rule->dport_range);
+		fib_rule_port_range_set(&rule->dport_range));
 }
 
 struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *,
-- 
2.22.0.410.gd8fdbe21b5-goog