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[INET]: Fix netdev renaming and inet address labels

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When re-naming an interface, the previous secondary address
labels get lost e.g.

  $> brctl addbr foo
  $> ip addr add 192.168.0.1 dev foo
  $> ip addr add 192.168.0.2 dev foo label foo:00
  $> ip addr show dev foo | grep inet
    inet 192.168.0.1/32 scope global foo
    inet 192.168.0.2/32 scope global foo:00
  $> ip link set foo name bar
  $> ip addr show dev bar | grep inet
    inet 192.168.0.1/32 scope global bar
    inet 192.168.0.2/32 scope global bar:2

Turns out to be a simple thinko in inetdev_changename() - clearly we
want to look at the address label, rather than the device name, for
a suffix to retain.

Signed-off-by: Mark McLoughlin <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Mark McLoughlin 2008-01-04 00:56:25 -08:00 • committed by David S. Miller
commit 44344b2a85
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/devinet.c
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@ -1027,7 +1027,7 @@ static void inetdev_changename(struct net_device *dev, struct in_device *in_dev)
memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
if (named++ == 0)
continue;
dot = strchr(ifa->ifa_label, ':');
dot = strchr(old, ':');
if (dot == NULL) {
sprintf(old, ":%d", named);
dot = old;