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Message-Id: <1200660796-22737-3-git-send-email-den@openvz.org>
Date: Fri, 18 Jan 2008 15:53:15 +0300
From: "Denis V. Lunev" <den@...nvz.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, devel@...nvz.org,
containers@...ts.osdl.org, "Denis V. Lunev" <den@...nvz.org>
Subject: [PATCH ] [NETNS 3/4 net-2.6.25] 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: Denis V. Lunev <den@...nvz.org>
Tested-by: Alexey Dobriyan <adobriyan@...nvz.org>
---
drivers/connector/connector.c | 9 +++------
drivers/scsi/scsi_netlink.c | 2 +-
drivers/scsi/scsi_transport_iscsi.c | 2 +-
fs/ecryptfs/netlink.c | 3 +--
include/linux/netlink.h | 1 +
net/bridge/netfilter/ebt_ulog.c | 4 ++--
net/core/rtnetlink.c | 2 +-
net/decnet/netfilter/dn_rtmsg.c | 4 ++--
net/ipv4/fib_frontend.c | 2 +-
net/ipv4/inet_diag.c | 2 +-
net/ipv4/netfilter/ip_queue.c | 4 ++--
net/ipv4/netfilter/ipt_ULOG.c | 4 ++--
net/ipv6/netfilter/ip6_queue.c | 4 ++--
net/netfilter/nfnetlink.c | 2 +-
net/netlink/af_netlink.c | 11 +++++++++++
net/xfrm/xfrm_user.c | 2 +-
16 files changed, 33 insertions(+), 25 deletions(-)
diff --git a/drivers/connector/connector.c b/drivers/connector/connector.c
index 37976dc..fea2d3e 100644
--- a/drivers/connector/connector.c
+++ b/drivers/connector/connector.c
@@ -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);
diff --git a/drivers/scsi/scsi_netlink.c b/drivers/scsi/scsi_netlink.c
index 40579ed..fe48c24 100644
--- a/drivers/scsi/scsi_netlink.c
+++ b/drivers/scsi/scsi_netlink.c
@@ -169,7 +169,7 @@ 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);
}
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 5428d15..9e463a6 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -1533,7 +1533,7 @@ unregister_transport_class:
static void __exit iscsi_transport_exit(void)
{
- 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);
diff --git a/fs/ecryptfs/netlink.c b/fs/ecryptfs/netlink.c
index 9aa3451..f638a69 100644
--- a/fs/ecryptfs/netlink.c
+++ b/fs/ecryptfs/netlink.c
@@ -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;
}
diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index 2aee0f5..bd13b6f 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -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);
diff --git a/net/bridge/netfilter/ebt_ulog.c b/net/bridge/netfilter/ebt_ulog.c
index b73ba28..8e7b00b 100644
--- a/net/bridge/netfilter/ebt_ulog.c
+++ b/net/bridge/netfilter/ebt_ulog.c
@@ -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);
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 2c1f665..2ef9480 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1381,7 +1381,7 @@ 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;
}
}
diff --git a/net/decnet/netfilter/dn_rtmsg.c b/net/decnet/netfilter/dn_rtmsg.c
index 96375f2..6d2bd32 100644
--- a/net/decnet/netfilter/dn_rtmsg.c
+++ b/net/decnet/netfilter/dn_rtmsg.c
@@ -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);
}
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 4e5216e..e787d21 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -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)
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index e468e7a..605ed2c 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -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);
}
diff --git a/net/ipv4/netfilter/ip_queue.c b/net/ipv4/netfilter/ip_queue.c
index 7361315..5109839 100644
--- a/net/ipv4/netfilter/ip_queue.c
+++ b/net/ipv4/netfilter/ip_queue.c
@@ -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);
diff --git a/net/ipv4/netfilter/ipt_ULOG.c b/net/ipv4/netfilter/ipt_ULOG.c
index fa24efa..b192756 100644
--- a/net/ipv4/netfilter/ipt_ULOG.c
+++ b/net/ipv4/netfilter/ipt_ULOG.c
@@ -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++) {
diff --git a/net/ipv6/netfilter/ip6_queue.c b/net/ipv6/netfilter/ip6_queue.c
index a20db0b..56b4ea6 100644
--- a/net/ipv6/netfilter/ip6_queue.c
+++ b/net/ipv6/netfilter/ip6_queue.c
@@ -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);
diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
index 2128542..b75c9c4 100644
--- a/net/netfilter/nfnetlink.c
+++ b/net/netfilter/nfnetlink.c
@@ -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;
}
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 29fef55..626a582 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -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
*
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 35fc16a..e0ccdf2 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -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);
--
1.5.3.rc5
--
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