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authorDavid Ahern <dsa@cumulusnetworks.com>2016-06-17 02:24:25 +0300
committerDavid S. Miller <davem@davemloft.net>2016-06-18 07:25:29 +0300
commit0d240e7811c4ec1965760ee4643b5bbc9cfacbb3 (patch)
tree8bdf0d3d57832b40568424b1d03bbc0cd51f39a1 /net/l3mdev
parenta2e2ff560f5113e8ca31432fbd985f5f1889efdc (diff)
downloadlinux-0d240e7811c4ec1965760ee4643b5bbc9cfacbb3.tar.xz
net: vrf: Implement get_saddr for IPv6
IPv6 source address selection needs to consider the real egress route. Similar to IPv4 implement a get_saddr6 method which is called if source address has not been set. The get_saddr6 method does a full lookup which means pulling a route from the VRF FIB table and properly considering linklocal/multicast destination addresses. Lookup failures (eg., unreachable) then cause the source address selection to fail which gets propagated back to the caller. Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/l3mdev')
-rw-r--r--net/l3mdev/l3mdev.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/net/l3mdev/l3mdev.c b/net/l3mdev/l3mdev.c
index d90e4ef09e85..c4a1c3e84e12 100644
--- a/net/l3mdev/l3mdev.c
+++ b/net/l3mdev/l3mdev.c
@@ -162,6 +162,30 @@ int l3mdev_get_saddr(struct net *net, int ifindex, struct flowi4 *fl4)
}
EXPORT_SYMBOL_GPL(l3mdev_get_saddr);
+int l3mdev_get_saddr6(struct net *net, const struct sock *sk,
+ struct flowi6 *fl6)
+{
+ struct net_device *dev;
+ int rc = 0;
+
+ if (fl6->flowi6_oif) {
+ rcu_read_lock();
+
+ dev = dev_get_by_index_rcu(net, fl6->flowi6_oif);
+ if (dev && netif_is_l3_slave(dev))
+ dev = netdev_master_upper_dev_get_rcu(dev);
+
+ if (dev && netif_is_l3_master(dev) &&
+ dev->l3mdev_ops->l3mdev_get_saddr6)
+ rc = dev->l3mdev_ops->l3mdev_get_saddr6(dev, sk, fl6);
+
+ rcu_read_unlock();
+ }
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(l3mdev_get_saddr6);
+
/**
* l3mdev_fib_rule_match - Determine if flowi references an
* L3 master device