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| author | Wang Chen <wangchen@cn.fujitsu.com> | 2008-07-03 12:13:30 +0800 |
|---|---|---|
| committer | YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | 2008-07-03 17:51:56 +0900 |
| commit | 623d1a1af77bd52a389c6eda5920e28eb2ee468b (patch) | |
| tree | 85d0a7fbcd83b5a2cacf50b24a66c0063f7eca07 | |
| parent | dd3abc4ef52597ec8268274222574b2700ba3ded (diff) | |
| download | linux-623d1a1af77bd52a389c6eda5920e28eb2ee468b.tar.gz linux-623d1a1af77bd52a389c6eda5920e28eb2ee468b.tar.bz2 linux-623d1a1af77bd52a389c6eda5920e28eb2ee468b.zip | |
ipv6: Do cleanup for ip6_mr_init.
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>
| -rw-r--r-- | include/linux/mroute6.h | 3 | ||||
| -rw-r--r-- | net/ipv6/af_inet6.c | 11 | ||||
| -rw-r--r-- | net/ipv6/ip6mr.c | 38 |
3 files changed, 45 insertions, 7 deletions
diff --git a/include/linux/mroute6.h b/include/linux/mroute6.h index e7989593142b..4c4d6f57d5c5 100644 --- a/include/linux/mroute6.h +++ b/include/linux/mroute6.h @@ -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 { diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 3ce8d2f318c6..6b39af1acb5e 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -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(); diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index 90e763073dc5..cfac26d674ed 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -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 + 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_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); +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) { |