netdev - [PATCH v2 net-next] net: Add low-latency/polling support for UDP multicast

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Message-Id: <1375818663-12318-1-git-send-email-sbohrer@rgmadvisors.com>
Date:	Tue,  6 Aug 2013 14:51:03 -0500
From:	Shawn Bohrer <sbohrer@...advisors.com>
To:	davem@...emloft.net
Cc:	eliezer.tamir@...ux.intel.com, netdev@...r.kernel.org,
	Amir Vadai <amirv@...lanox.com>, tomk@...advisors.com,
	Shawn Bohrer <sbohrer@...advisors.com>
Subject: [PATCH v2 net-next] net: Add low-latency/polling support for UDP multicast

Set the napi id for each socket in the multicast path to enable
low-latency/polling support.

Signed-off-by: Shawn Bohrer <sbohrer@...advisors.com>
---
v2 include ipv6 support

 net/ipv4/udp.c |    1 +
 net/ipv6/udp.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 766e6ba..0d0da17 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1596,6 +1596,7 @@ static int __udp4_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
 	dif = skb->dev->ifindex;
 	sk = udp_v4_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif);
 	while (sk) {
+		sk_mark_napi_id(sk, skb);
 		stack[count++] = sk;
 		sk = udp_v4_mcast_next(net, sk_nulls_next(sk), uh->dest,
 				       daddr, uh->source, saddr, dif);
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index f405815..82be372 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -756,6 +756,7 @@ static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
 	dif = inet6_iif(skb);
 	sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif);
 	while (sk) {
+		sk_mark_napi_id(sk, skb);
 		stack[count++] = sk;
 		sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr,
 				       uh->source, saddr, dif);
-- 
1.7.7.6


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