From 0cc217e16cb8ca8ef2544363571fce94259900e0 Mon Sep 17 00:00:00 2001
From: "Eric W. Biederman" <ebiederm@xmission.com>
Date: Wed, 26 Sep 2007 22:10:06 -0700
Subject: [PATCH] [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>
---
net/ipv4/devinet.c | 4 ++--
net/ipv4/ipconfig.c | 10 +++++++---
net/ipv4/ipvs/ip_vs_core.c | 2 +-
3 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index e7f2b022316e..55d199e4ae21 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -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 =
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index 2d2e0cda0470..af5d5b39fc13 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -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) &&
diff --git a/net/ipv4/ipvs/ip_vs_core.c b/net/ipv4/ipvs/ip_vs_core.c
index 74503267e5d4..fbca2a2ff29f 100644
--- a/net/ipv4/ipvs/ip_vs_core.c
+++ b/net/ipv4/ipvs/ip_vs_core.c
@@ -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,
--
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