[NET]: Make the loopback device per network namespace.
This patch makes loopback_dev per network namespace. Adding
code to create a different loopback device for each network
namespace and adding the code to free a loopback device
when a network namespace exits.
This patch modifies all users the loopback_dev so they
access it as init_net.loopback_dev, keeping all of the
code compiling and working. A later pass will be needed to
update the users to use something other than the initial network
namespace.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index 96fe0aa..b7ebf99 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -887,7 +887,7 @@
.scope = RT_SCOPE_UNIVERSE,
} },
.mark = oldflp->mark,
- .iif = loopback_dev->ifindex,
+ .iif = init_net.loopback_dev->ifindex,
.oif = oldflp->oif };
struct dn_route *rt = NULL;
struct net_device *dev_out = NULL, *dev;
@@ -904,7 +904,7 @@
"dn_route_output_slow: dst=%04x src=%04x mark=%d"
" iif=%d oif=%d\n", dn_ntohs(oldflp->fld_dst),
dn_ntohs(oldflp->fld_src),
- oldflp->mark, loopback_dev->ifindex, oldflp->oif);
+ oldflp->mark, init_net.loopback_dev->ifindex, oldflp->oif);
/* If we have an output interface, verify its a DECnet device */
if (oldflp->oif) {
@@ -957,7 +957,7 @@
err = -EADDRNOTAVAIL;
if (dev_out)
dev_put(dev_out);
- dev_out = loopback_dev;
+ dev_out = init_net.loopback_dev;
dev_hold(dev_out);
if (!fl.fld_dst) {
fl.fld_dst =
@@ -966,7 +966,7 @@
if (!fl.fld_dst)
goto out;
}
- fl.oif = loopback_dev->ifindex;
+ fl.oif = init_net.loopback_dev->ifindex;
res.type = RTN_LOCAL;
goto make_route;
}
@@ -1012,7 +1012,7 @@
if (dev_out)
dev_put(dev_out);
if (dn_dev_islocal(neigh->dev, fl.fld_dst)) {
- dev_out = loopback_dev;
+ dev_out = init_net.loopback_dev;
res.type = RTN_LOCAL;
} else {
dev_out = neigh->dev;
@@ -1033,7 +1033,7 @@
/* Possible improvement - check all devices for local addr */
if (dn_dev_islocal(dev_out, fl.fld_dst)) {
dev_put(dev_out);
- dev_out = loopback_dev;
+ dev_out = init_net.loopback_dev;
dev_hold(dev_out);
res.type = RTN_LOCAL;
goto select_source;
@@ -1069,7 +1069,7 @@
fl.fld_src = fl.fld_dst;
if (dev_out)
dev_put(dev_out);
- dev_out = loopback_dev;
+ dev_out = init_net.loopback_dev;
dev_hold(dev_out);
fl.oif = dev_out->ifindex;
if (res.fi)