From b7c6ba6eb1234e35a74fb8ba8123232a7b1ba9e4 Mon Sep 17 00:00:00 2001 From: "Denis V. Lunev" Date: Mon, 28 Jan 2008 14:41:19 -0800 Subject: [PATCH] [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: Denis V. Lunev Tested-by: Alexey Dobriyan Signed-off-by: David S. Miller --- drivers/connector/connector.c | 9 +++------ drivers/scsi/scsi_netlink.c | 2 +- drivers/scsi/scsi_transport_iscsi.c | 4 ++-- 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, 34 insertions(+), 26 deletions(-) diff --git a/drivers/connector/connector.c b/drivers/connector/connector.c index 37976dcf04..fea2d3ed9c 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 3e15918281..370c78cc1c 100644 --- a/drivers/scsi/scsi_netlink.c +++ b/drivers/scsi/scsi_netlink.c @@ -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); } diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index ef0e742648..0d7b4e7941 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -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); diff --git a/fs/ecryptfs/netlink.c b/fs/ecryptfs/netlink.c index 9aa345121e..f638a698dc 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 2aee0f5108..bd13b6f4a9 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 b73ba28bcb..8e7b00b68d 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 a5f4f661fa..02cf848f71 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -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; } } diff --git a/net/decnet/netfilter/dn_rtmsg.c b/net/decnet/netfilter/dn_rtmsg.c index 96375f2e64..6d2bd32020 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 4e5216e9aa..e787d21511 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 e468e7a7aa..605ed2cd79 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 7361315f20..5109839da2 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 fa24efaf3e..b192756c6d 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 a20db0bb5a..56b4ea6d29 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 2128542995..b75c9c4a99 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 29fef558aa..626a582062 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 35fc16ae50..e0ccdf2678 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); -- 2.39.5