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[IPV4]: Cleanup sysctl manipulations in devinet.c 

This includes:

 * moving neigh_sysctl_(un)register calls inside
   devinet_sysctl_(un)register ones, as they are always
   called in pairs;
 * making __devinet_sysctl_unregister() to unregister
   the ipv4_devconf struct, while original devinet_sysctl_unregister()
   works with the in_device to handle both - devconf and
   neigh sysctls;
 * make stubs for CONFIG_SYSCTL=n case to get rid of
   in-code ifdefs.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2007-12-11 02:17:40 -08:00 committed by David S. Miller
parent 01ecfe9ba6
commit 51602b2a5e
1 changed files with 29 additions and 30 deletions
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59
net/ipv4/devinet.c
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@ -99,7 +99,14 @@ static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
int destroy);
#ifdef CONFIG_SYSCTL
static void devinet_sysctl_register(struct in_device *idev);
static void devinet_sysctl_unregister(struct ipv4_devconf *p);
static void devinet_sysctl_unregister(struct in_device *idev);
#else
static inline void devinet_sysctl_register(struct in_device *idev)
{
}
static inline void devinet_sysctl_unregister(struct in_device *idev)
{
}
#endif
/* Locks all the inet devices. */
@ -163,17 +170,10 @@ static struct in_device *inetdev_init(struct net_device *dev)
goto out_kfree;
/* Reference in_dev->dev */
dev_hold(dev);
#ifdef CONFIG_SYSCTL
neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4,
NET_IPV4_NEIGH, "ipv4", NULL, NULL);
#endif
/* Account for reference dev->ip_ptr (below) */
in_dev_hold(in_dev);
#ifdef CONFIG_SYSCTL
devinet_sysctl_register(in_dev);
#endif
ip_mc_init_dev(in_dev);
if (dev->flags & IFF_UP)
ip_mc_up(in_dev);
@ -212,15 +212,9 @@ static void inetdev_destroy(struct in_device *in_dev)
inet_free_ifa(ifa);
}
#ifdef CONFIG_SYSCTL
devinet_sysctl_unregister(&in_dev->cnf);
#endif
dev->ip_ptr = NULL;
#ifdef CONFIG_SYSCTL
neigh_sysctl_unregister(in_dev->arp_parms);
#endif
devinet_sysctl_unregister(in_dev);
neigh_parms_release(&arp_tbl, in_dev->arp_parms);
arp_ifdown(dev);
@ -1113,13 +1107,8 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
*/
inetdev_changename(dev, in_dev);
#ifdef CONFIG_SYSCTL
devinet_sysctl_unregister(&in_dev->cnf);
neigh_sysctl_unregister(in_dev->arp_parms);
neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4,
NET_IPV4_NEIGH, "ipv4", NULL, NULL);
devinet_sysctl_unregister(in_dev);
devinet_sysctl_register(in_dev);
#endif
break;
}
out:
@ -1518,21 +1507,31 @@ out:
return;
}
static void __devinet_sysctl_unregister(struct ipv4_devconf *cnf)
{
struct devinet_sysctl_table *t = cnf->sysctl;
if (t == NULL)
return;
cnf->sysctl = NULL;
unregister_sysctl_table(t->sysctl_header);
kfree(t->dev_name);
kfree(t);
}
static void devinet_sysctl_register(struct in_device *idev)
{
return __devinet_sysctl_register(idev->dev->name, idev->dev->ifindex,
neigh_sysctl_register(idev->dev, idev->arp_parms, NET_IPV4,
NET_IPV4_NEIGH, "ipv4", NULL, NULL);
__devinet_sysctl_register(idev->dev->name, idev->dev->ifindex,
&idev->cnf);
}
static void devinet_sysctl_unregister(struct ipv4_devconf *p)
static void devinet_sysctl_unregister(struct in_device *idev)
{
if (p->sysctl) {
struct devinet_sysctl_table *t = p->sysctl;
p->sysctl = NULL;
unregister_sysctl_table(t->sysctl_header);
kfree(t->dev_name);
kfree(t);
}
__devinet_sysctl_unregister(&idev->cnf);
neigh_sysctl_unregister(idev->arp_parms);
}
#endif