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ipv6: Do cleanup for ip6_mr_init.

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If do not do it, we will get following issues:
1. Leaving junks after inet6_init failing halfway.
2. Leaving proc and notifier junks after ipv6 modules unloading.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
Wang Chen 2008-07-03 12:13:30 +08:00 committed by YOSHIFUJI Hideaki
parent dd3abc4ef5
commit 623d1a1af7
3 changed files with 45 additions and 7 deletions
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3
include/linux/mroute6.h
View File

@ -135,7 +135,8 @@ extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, int);
extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
extern int ip6_mr_input(struct sk_buff *skb);
extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
extern void ip6_mr_init(void);
extern int ip6_mr_init(void);
extern void ip6_mr_cleanup(void);
struct mif_device
{

11
net/ipv6/af_inet6.c
View File

@ -953,7 +953,9 @@ static int __init inet6_init(void)
if (err)
goto icmp_fail;
#ifdef CONFIG_IPV6_MROUTE
ip6_mr_init();
err = ip6_mr_init();
if (err)
goto ipmr_fail;
#endif
err = ndisc_init();
if (err)
@ -1057,6 +1059,10 @@ netfilter_fail:
igmp_fail:
ndisc_cleanup();
ndisc_fail:
#ifdef CONFIG_IPV6_MROUTE
ip6_mr_cleanup();
ipmr_fail:
#endif
icmpv6_cleanup();
icmp_fail:
unregister_pernet_subsys(&inet6_net_ops);
@ -1111,6 +1117,9 @@ static void __exit inet6_exit(void)
ipv6_netfilter_fini();
igmp6_cleanup();
ndisc_cleanup();
#ifdef CONFIG_IPV6_MROUTE
ip6_mr_cleanup();
#endif
icmpv6_cleanup();
rawv6_exit();

38
net/ipv6/ip6mr.c
View File

@ -948,23 +948,51 @@ static struct notifier_block ip6_mr_notifier = {
* Setup for IP multicast routing
*/
void __init ip6_mr_init(void)
int __init ip6_mr_init(void)
{
int err;
mrt_cachep = kmem_cache_create("ip6_mrt_cache",
sizeof(struct mfc6_cache),
0, SLAB_HWCACHE_ALIGN,
NULL);
if (!mrt_cachep)
panic("cannot allocate ip6_mrt_cache");
return -ENOMEM;
setup_timer(&ipmr_expire_timer, ipmr_expire_process, 0);
register_netdevice_notifier(&ip6_mr_notifier);
err = register_netdevice_notifier(&ip6_mr_notifier);
if (err)
goto reg_notif_fail;
#ifdef CONFIG_PROC_FS
proc_net_fops_create(&init_net, "ip6_mr_vif", 0, &ip6mr_vif_fops);
proc_net_fops_create(&init_net, "ip6_mr_cache", 0, &ip6mr_mfc_fops);
err = -ENOMEM;
if (!proc_net_fops_create(&init_net, "ip6_mr_vif", 0, &ip6mr_vif_fops))
goto proc_vif_fail;
if (!proc_net_fops_create(&init_net, "ip6_mr_cache",
0, &ip6mr_mfc_fops))
goto proc_cache_fail;
#endif
return 0;
reg_notif_fail:
kmem_cache_destroy(mrt_cachep);
#ifdef CONFIG_PROC_FS
proc_vif_fail:
unregister_netdevice_notifier(&ip6_mr_notifier);
proc_cache_fail:
proc_net_remove(&init_net, "ip6_mr_vif");
#endif
return err;
}
void ip6_mr_cleanup(void)
{
#ifdef CONFIG_PROC_FS
proc_net_remove(&init_net, "ip6_mr_cache");
proc_net_remove(&init_net, "ip6_mr_vif");
#endif
unregister_netdevice_notifier(&ip6_mr_notifier);
del_timer(&ipmr_expire_timer);
kmem_cache_destroy(mrt_cachep);
}
static int ip6mr_mfc_add(struct mf6cctl *mfc, int mrtsock)
{