diff options
| author | David Ahern <dsa@cumulusnetworks.com> | 2016-06-16 16:24:25 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-06-17 21:25:29 -0700 |
| commit | 0d240e7811c4ec1965760ee4643b5bbc9cfacbb3 (patch) | |
| tree | 8bdf0d3d57832b40568424b1d03bbc0cd51f39a1 /net/l3mdev | |
| parent | a2e2ff560f5113e8ca31432fbd985f5f1889efdc (diff) | |
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.c | 24 |
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 |