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authorDavid Ahern <dsa@cumulusnetworks.com>2016-09-10 12:09:54 -0700
committerDavid S. Miller <davem@davemloft.net>2016-09-10 23:12:52 -0700
commit5f02ce24c2696fec33f2a5dfcf753996f5fdd211 (patch)
tree123e0a2518f4a18e5d0b59c6e3442c5f355b23f5 /net/ipv4
parenta8e3e1a9f02094145580ea7920c6a1d9aabd5539 (diff)
net: l3mdev: Allow the l3mdev to be a loopback
Allow an L3 master device to act as the loopback for that L3 domain. For IPv4 the device can also have the address 127.0.0.1. Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/route.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 3e992783c1d0..f49b2c534e92 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2018,7 +2018,9 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
return ERR_PTR(-EINVAL);
if (likely(!IN_DEV_ROUTE_LOCALNET(in_dev)))
- if (ipv4_is_loopback(fl4->saddr) && !(dev_out->flags & IFF_LOOPBACK))
+ if (ipv4_is_loopback(fl4->saddr) &&
+ !(dev_out->flags & IFF_LOOPBACK) &&
+ !netif_is_l3_master(dev_out))
return ERR_PTR(-EINVAL);
if (ipv4_is_lbcast(fl4->daddr))
@@ -2302,7 +2304,9 @@ struct rtable *__ip_route_output_key_hash(struct net *net, struct flowi4 *fl4,
else
fl4->saddr = fl4->daddr;
}
- dev_out = net->loopback_dev;
+
+ /* L3 master device is the loopback for that domain */
+ dev_out = l3mdev_master_dev_rcu(dev_out) ? : net->loopback_dev;
fl4->flowi4_oif = dev_out->ifindex;
flags |= RTCF_LOCAL;
goto make_route;