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Message-Id: <1462419210-10463-14-git-send-email-dsa@cumulusnetworks.com>
Date: Wed, 4 May 2016 20:33:30 -0700
From: David Ahern <dsa@...ulusnetworks.com>
To: netdev@...r.kernel.org
Cc: David Ahern <dsa@...ulusnetworks.com>
Subject: [PATCH net-next 13/13] net: ipv6: address selection should only consider devices in L3 domain
IPv6 version of 3f2fb9a834cb ("net: l3mdev: address selection should only
consider devices in L3 domain"). IPv4's follow up commit, a17b693cdd876
("net: l3mdev: prefer VRF master for source address selection"), is not
relevant. For IPv6 the VRF device should not be preferred over the dst_dev
as it leads to unnecessary forwarding versus a direct hop.
Signed-off-by: David Ahern <dsa@...ulusnetworks.com>
---
net/ipv6/addrconf.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index b12553905e42..d13813867460 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1577,7 +1577,14 @@ int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev,
if (idev)
hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx);
} else {
+ int master_idx = l3mdev_master_ifindex_rcu(dst_dev);
+
for_each_netdev_rcu(net, dev) {
+ /* only consider addresses on devices in the
+ * same L3 domain
+ */
+ if (l3mdev_master_ifindex_rcu(dev) != master_idx)
+ continue;
idev = __in6_dev_get(dev);
if (!idev)
continue;
--
2.1.4
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