Commit b7c6ba6e authored by Denis V. Lunev's avatar Denis V. Lunev Committed by David S. Miller

[NETNS]: Consolidate kernel netlink socket destruction.

Create a specific helper for netlink kernel socket disposal. This just
let the code look better and provides a ground for proper disposal
inside a namespace.
Signed-off-by: default avatarDenis V. Lunev <den@openvz.org>
Tested-by: default avatarAlexey Dobriyan <adobriyan@openvz.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4f84d82f
......@@ -420,8 +420,7 @@ static int __devinit cn_init(void)
dev->cbdev = cn_queue_alloc_dev("cqueue", dev->nls);
if (!dev->cbdev) {
if (dev->nls->sk_socket)
sock_release(dev->nls->sk_socket);
netlink_kernel_release(dev->nls);
return -EINVAL;
}
......@@ -431,8 +430,7 @@ static int __devinit cn_init(void)
if (err) {
cn_already_initialized = 0;
cn_queue_free_dev(dev->cbdev);
if (dev->nls->sk_socket)
sock_release(dev->nls->sk_socket);
netlink_kernel_release(dev->nls);
return -EINVAL;
}
......@@ -447,8 +445,7 @@ static void __devexit cn_fini(void)
cn_del_callback(&dev->id);
cn_queue_free_dev(dev->cbdev);
if (dev->nls->sk_socket)
sock_release(dev->nls->sk_socket);
netlink_kernel_release(dev->nls);
}
subsys_initcall(cn_init);
......
......@@ -164,7 +164,7 @@ void
scsi_netlink_exit(void)
{
if (scsi_nl_sock) {
sock_release(scsi_nl_sock->sk_socket);
netlink_kernel_release(scsi_nl_sock);
netlink_unregister_notifier(&scsi_netlink_notifier);
}
......
......@@ -1558,7 +1558,7 @@ static __init int iscsi_transport_init(void)
return 0;
release_nls:
sock_release(nls->sk_socket);
netlink_kernel_release(nls);
unregister_session_class:
transport_class_unregister(&iscsi_session_class);
unregister_conn_class:
......@@ -1573,7 +1573,7 @@ static __init int iscsi_transport_init(void)
static void __exit iscsi_transport_exit(void)
{
destroy_workqueue(iscsi_eh_timer_workq);
sock_release(nls->sk_socket);
netlink_kernel_release(nls);
transport_class_unregister(&iscsi_connection_class);
transport_class_unregister(&iscsi_session_class);
transport_class_unregister(&iscsi_host_class);
......
......@@ -237,7 +237,6 @@ int ecryptfs_init_netlink(void)
*/
void ecryptfs_release_netlink(void)
{
if (ecryptfs_nl_sock && ecryptfs_nl_sock->sk_socket)
sock_release(ecryptfs_nl_sock->sk_socket);
netlink_kernel_release(ecryptfs_nl_sock);
ecryptfs_nl_sock = NULL;
}
......@@ -178,6 +178,7 @@ extern struct sock *netlink_kernel_create(struct net *net,
void (*input)(struct sk_buff *skb),
struct mutex *cb_mutex,
struct module *module);
extern void netlink_kernel_release(struct sock *sk);
extern int netlink_change_ngroups(struct sock *sk, unsigned int groups);
extern void netlink_clear_multicast_users(struct sock *sk, unsigned int group);
extern void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err);
......
......@@ -307,7 +307,7 @@ static int __init ebt_ulog_init(void)
if (!ebtulognl)
ret = -ENOMEM;
else if ((ret = ebt_register_watcher(&ulog)))
sock_release(ebtulognl->sk_socket);
netlink_kernel_release(ebtulognl);
if (ret == 0)
nf_log_register(PF_BRIDGE, &ebt_ulog_logger);
......@@ -333,7 +333,7 @@ static void __exit ebt_ulog_fini(void)
}
spin_unlock_bh(&ub->lock);
}
sock_release(ebtulognl->sk_socket);
netlink_kernel_release(ebtulognl);
}
module_init(ebt_ulog_init);
......
......@@ -1384,7 +1384,7 @@ static void rtnetlink_net_exit(struct net *net)
* free.
*/
sk->sk_net = get_net(&init_net);
sock_release(net->rtnl->sk_socket);
netlink_kernel_release(net->rtnl);
net->rtnl = NULL;
}
}
......
......@@ -137,7 +137,7 @@ static int __init dn_rtmsg_init(void)
rv = nf_register_hook(&dnrmg_ops);
if (rv) {
sock_release(dnrmg->sk_socket);
netlink_kernel_release(dnrmg);
}
return rv;
......@@ -146,7 +146,7 @@ static int __init dn_rtmsg_init(void)
static void __exit dn_rtmsg_fini(void)
{
nf_unregister_hook(&dnrmg_ops);
sock_release(dnrmg->sk_socket);
netlink_kernel_release(dnrmg);
}
......
......@@ -881,7 +881,7 @@ static void nl_fib_lookup_exit(struct net *net)
* initial network namespace. So the socket will be safe to free.
*/
net->ipv4.fibnl->sk_net = get_net(&init_net);
sock_release(net->ipv4.fibnl->sk_socket);
netlink_kernel_release(net->ipv4.fibnl);
}
static void fib_disable_ip(struct net_device *dev, int force)
......
......@@ -935,7 +935,7 @@ static int __init inet_diag_init(void)
static void __exit inet_diag_exit(void)
{
sock_release(idiagnl->sk_socket);
netlink_kernel_release(idiagnl);
kfree(inet_diag_table);
}
......
......@@ -605,7 +605,7 @@ static int __init ip_queue_init(void)
unregister_netdevice_notifier(&ipq_dev_notifier);
proc_net_remove(&init_net, IPQ_PROC_FS_NAME);
cleanup_ipqnl:
sock_release(ipqnl->sk_socket);
netlink_kernel_release(ipqnl);
mutex_lock(&ipqnl_mutex);
mutex_unlock(&ipqnl_mutex);
......@@ -624,7 +624,7 @@ static void __exit ip_queue_fini(void)
unregister_netdevice_notifier(&ipq_dev_notifier);
proc_net_remove(&init_net, IPQ_PROC_FS_NAME);
sock_release(ipqnl->sk_socket);
netlink_kernel_release(ipqnl);
mutex_lock(&ipqnl_mutex);
mutex_unlock(&ipqnl_mutex);
......
......@@ -415,7 +415,7 @@ static int __init ulog_tg_init(void)
ret = xt_register_target(&ulog_tg_reg);
if (ret < 0) {
sock_release(nflognl->sk_socket);
netlink_kernel_release(nflognl);
return ret;
}
if (nflog)
......@@ -434,7 +434,7 @@ static void __exit ulog_tg_exit(void)
if (nflog)
nf_log_unregister(&ipt_ulog_logger);
xt_unregister_target(&ulog_tg_reg);
sock_release(nflognl->sk_socket);
netlink_kernel_release(nflognl);
/* remove pending timers and free allocated skb's */
for (i = 0; i < ULOG_MAXNLGROUPS; i++) {
......
......@@ -609,7 +609,7 @@ static int __init ip6_queue_init(void)
proc_net_remove(&init_net, IPQ_PROC_FS_NAME);
cleanup_ipqnl:
sock_release(ipqnl->sk_socket);
netlink_kernel_release(ipqnl);
mutex_lock(&ipqnl_mutex);
mutex_unlock(&ipqnl_mutex);
......@@ -628,7 +628,7 @@ static void __exit ip6_queue_fini(void)
unregister_netdevice_notifier(&ipq_dev_notifier);
proc_net_remove(&init_net, IPQ_PROC_FS_NAME);
sock_release(ipqnl->sk_socket);
netlink_kernel_release(ipqnl);
mutex_lock(&ipqnl_mutex);
mutex_unlock(&ipqnl_mutex);
......
......@@ -179,7 +179,7 @@ static void nfnetlink_rcv(struct sk_buff *skb)
static void __exit nfnetlink_exit(void)
{
printk("Removing netfilter NETLINK layer.\n");
sock_release(nfnl->sk_socket);
netlink_kernel_release(nfnl);
return;
}
......
......@@ -1405,6 +1405,17 @@ netlink_kernel_create(struct net *net, int unit, unsigned int groups,
}
EXPORT_SYMBOL(netlink_kernel_create);
void
netlink_kernel_release(struct sock *sk)
{
if (sk == NULL || sk->sk_socket == NULL)
return;
sock_release(sk->sk_socket);
}
EXPORT_SYMBOL(netlink_kernel_release);
/**
* netlink_change_ngroups - change number of multicast groups
*
......
......@@ -2420,7 +2420,7 @@ static void __exit xfrm_user_exit(void)
xfrm_unregister_km(&netlink_mgr);
rcu_assign_pointer(xfrm_nl, NULL);
synchronize_rcu();
sock_release(nlsk->sk_socket);
netlink_kernel_release(nlsk);
}
module_init(xfrm_user_init);
......
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