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[NETNS]: Consolidate kernel netlink socket destruction.

Browse source 
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: Denis V. Lunev <den@openvz.org>
Tested-by: Alexey Dobriyan <adobriyan@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Denis V. Lunev 2008-01-28 14:41:19 -08:00 committed by David S. Miller
parent 4f84d82f7a
commit b7c6ba6eb1
16 changed files with 34 additions and 26 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
drivers/connector/connector.c
View file

@ -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);

2
drivers/scsi/scsi_netlink.c
View file

@ -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);
}

4
drivers/scsi/scsi_transport_iscsi.c
View file

@ -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 @@ unregister_transport_class:
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);

3
fs/ecryptfs/netlink.c
View file

@ -237,7 +237,6 @@ out:
*/
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;
}

1
include/linux/netlink.h
View file

@ -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);

4
net/bridge/netfilter/ebt_ulog.c
View file

@ -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);

2
net/core/rtnetlink.c
View file

@ -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;
}
}

4
net/decnet/netfilter/dn_rtmsg.c
View file

@ -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);
}

2
net/ipv4/fib_frontend.c
View file

@ -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)

2
net/ipv4/inet_diag.c
View file

@ -935,7 +935,7 @@ out_free_table:
static void __exit inet_diag_exit(void)
{
sock_release(idiagnl->sk_socket);
netlink_kernel_release(idiagnl);
kfree(inet_diag_table);
}

4
net/ipv4/netfilter/ip_queue.c
View file

@ -605,7 +605,7 @@ cleanup_sysctl:
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);

4
net/ipv4/netfilter/ipt_ULOG.c
View file

@ -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++) {

4
net/ipv6/netfilter/ip6_queue.c
View file

@ -609,7 +609,7 @@ cleanup_sysctl:
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);

2
net/netfilter/nfnetlink.c
View file

@ -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;
}

11
net/netlink/af_netlink.c
View file

@ -1405,6 +1405,17 @@ out_sock_release:
}
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
*

2
net/xfrm/xfrm_user.c
View file

@ -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);