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[IPV4]: When possible test for IFF_LOOPBACK and not dev == loopback_dev 

Now that multiple loopback devices are becoming possible it makes
the code a little cleaner and more maintainable to test if a deivice
is th a loopback device by testing dev->flags & IFF_LOOPBACK instead
of dev == loopback_dev.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2007-09-26 22:10:06 -07:00 committed by David S. Miller
parent 5967789dbc
commit 0cc217e16c
3 changed files with 10 additions and 6 deletions
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4
net/ipv4/devinet.c
View File

@ -1059,7 +1059,7 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
in_dev = inetdev_init(dev);
if (!in_dev)
return notifier_from_errno(-ENOMEM);
if (dev == loopback_dev) {
if (dev->flags & IFF_LOOPBACK) {
IN_DEV_CONF_SET(in_dev, NOXFRM, 1);
IN_DEV_CONF_SET(in_dev, NOPOLICY, 1);
}
@ -1075,7 +1075,7 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
case NETDEV_UP:
if (dev->mtu < 68)
break;
if (dev == loopback_dev) {
if (dev->flags & IFF_LOOPBACK) {
struct in_ifaddr *ifa;
if ((ifa = inet_alloc_ifa()) != NULL) {
ifa->ifa_local =

10
net/ipv4/ipconfig.c
View File

@ -190,11 +190,15 @@ static int __init ic_open_devs(void)
rtnl_lock();
/* bring loopback device up first */
if (dev_change_flags(loopback_dev, loopback_dev->flags | IFF_UP) < 0)
printk(KERN_ERR "IP-Config: Failed to open %s\n", loopback_dev->name);
for_each_netdev(&init_net, dev) {
if (!(dev->flags & IFF_LOOPBACK))
continue;
if (dev_change_flags(dev, dev->flags | IFF_UP) < 0)
printk(KERN_ERR "IP-Config: Failed to open %s\n", dev->name);
}
for_each_netdev(&init_net, dev) {
if (dev == loopback_dev)
if (dev->flags & IFF_LOOPBACK)
continue;
if (user_dev_name[0] ? !strcmp(dev->name, user_dev_name) :
(!(dev->flags & IFF_LOOPBACK) &&

2
net/ipv4/ipvs/ip_vs_core.c
View File

@ -961,7 +961,7 @@ ip_vs_in(unsigned int hooknum, struct sk_buff **pskb,
* ... don't know why 1st test DOES NOT include 2nd (?)
*/
if (unlikely(skb->pkt_type != PACKET_HOST
|| skb->dev == loopback_dev || skb->sk)) {
|| skb->dev->flags & IFF_LOOPBACK || skb->sk)) {
IP_VS_DBG(12, "packet type=%d proto=%d daddr=%d.%d.%d.%d ignored\n",
skb->pkt_type,
ip_hdr(skb)->protocol,