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Message-ID: <12743790374089@kroah.org>
Date: Thu, 20 May 2010 11:10:37 -0700
From: <gregkh@...e.de>
To: ebiederm@...ssion.com, bcrl@...et.ca, cornelia.huck@...ibm.com,
davem@...emloft.net, eric.dumazet@...il.com, gregkh@...e.de,
kay.sievers@...y.org, netdev@...r.kernel.org, serue@...ibm.com,
tj@...nel.org
Subject: patch kobject-send-hotplug-events-in-all-network-namespaces.patch added to gregkh-2.6 tree
This is a note to let you know that I've just added the patch titled
Subject: kobject: Send hotplug events in all network namespaces
to my gregkh-2.6 tree. Its filename is
kobject-send-hotplug-events-in-all-network-namespaces.patch
This tree can be found at
http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/
>From ebiederm@...ssion.com Thu May 20 10:40:26 2010
From: "Eric W. Biederman" <ebiederm@...ssion.com>
Date: Tue, 4 May 2010 17:36:44 -0700
Subject: kobject: Send hotplug events in all network namespaces
To: Greg Kroah-Hartman <gregkh@...e.de>
Cc: Kay Sievers <kay.sievers@...y.org>, linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>, Cornelia Huck <cornelia.huck@...ibm.com>, Eric Dumazet <eric.dumazet@...il.com>, Benjamin LaHaise <bcrl@...et.ca>, Serge Hallyn <serue@...ibm.com>, <netdev@...r.kernel.org>, David Miller <davem@...emloft.net>, "Eric W. Biederman" <ebiederm@...ssion.com>
Message-ID: <1273019809-16472-1-git-send-email-ebiederm@...ssion.com>
From: Eric W. Biederman <ebiederm@...ssion.com>
Open a copy of the uevent kernel socket in each network
namespace so we can send uevents in all network namespaces.
Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>
Acked-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
lib/kobject_uevent.c | 68 +++++++++++++++++++++++++++++++++++++++++++++------
1 file changed, 60 insertions(+), 8 deletions(-)
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -24,13 +24,19 @@
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include <net/sock.h>
+#include <net/net_namespace.h>
u64 uevent_seqnum;
char uevent_helper[UEVENT_HELPER_PATH_LEN] = CONFIG_UEVENT_HELPER_PATH;
static DEFINE_SPINLOCK(sequence_lock);
-#if defined(CONFIG_NET)
-static struct sock *uevent_sock;
+#ifdef CONFIG_NET
+struct uevent_sock {
+ struct list_head list;
+ struct sock *sk;
+};
+static LIST_HEAD(uevent_sock_list);
+static DEFINE_MUTEX(uevent_sock_mutex);
#endif
/* the strings here must match the enum in include/linux/kobject.h */
@@ -100,6 +106,9 @@ int kobject_uevent_env(struct kobject *k
u64 seq;
int i = 0;
int retval = 0;
+#ifdef CONFIG_NET
+ struct uevent_sock *ue_sk;
+#endif
pr_debug("kobject: '%s' (%p): %s\n",
kobject_name(kobj), kobj, __func__);
@@ -211,7 +220,9 @@ int kobject_uevent_env(struct kobject *k
#if defined(CONFIG_NET)
/* send netlink message */
- if (uevent_sock) {
+ mutex_lock(&uevent_sock_mutex);
+ list_for_each_entry(ue_sk, &uevent_sock_list, list) {
+ struct sock *uevent_sock = ue_sk->sk;
struct sk_buff *skb;
size_t len;
@@ -241,6 +252,7 @@ int kobject_uevent_env(struct kobject *k
} else
retval = -ENOMEM;
}
+ mutex_unlock(&uevent_sock_mutex);
#endif
/* call uevent_helper, usually only enabled during early boot */
@@ -320,18 +332,58 @@ int add_uevent_var(struct kobj_uevent_en
EXPORT_SYMBOL_GPL(add_uevent_var);
#if defined(CONFIG_NET)
-static int __init kobject_uevent_init(void)
+static int uevent_net_init(struct net *net)
{
- uevent_sock = netlink_kernel_create(&init_net, NETLINK_KOBJECT_UEVENT,
- 1, NULL, NULL, THIS_MODULE);
- if (!uevent_sock) {
+ struct uevent_sock *ue_sk;
+
+ ue_sk = kzalloc(sizeof(*ue_sk), GFP_KERNEL);
+ if (!ue_sk)
+ return -ENOMEM;
+
+ ue_sk->sk = netlink_kernel_create(net, NETLINK_KOBJECT_UEVENT,
+ 1, NULL, NULL, THIS_MODULE);
+ if (!ue_sk->sk) {
printk(KERN_ERR
"kobject_uevent: unable to create netlink socket!\n");
return -ENODEV;
}
- netlink_set_nonroot(NETLINK_KOBJECT_UEVENT, NL_NONROOT_RECV);
+ mutex_lock(&uevent_sock_mutex);
+ list_add_tail(&ue_sk->list, &uevent_sock_list);
+ mutex_unlock(&uevent_sock_mutex);
return 0;
}
+static void uevent_net_exit(struct net *net)
+{
+ struct uevent_sock *ue_sk;
+
+ mutex_lock(&uevent_sock_mutex);
+ list_for_each_entry(ue_sk, &uevent_sock_list, list) {
+ if (sock_net(ue_sk->sk) == net)
+ goto found;
+ }
+ mutex_unlock(&uevent_sock_mutex);
+ return;
+
+found:
+ list_del(&ue_sk->list);
+ mutex_unlock(&uevent_sock_mutex);
+
+ netlink_kernel_release(ue_sk->sk);
+ kfree(ue_sk);
+}
+
+static struct pernet_operations uevent_net_ops = {
+ .init = uevent_net_init,
+ .exit = uevent_net_exit,
+};
+
+static int __init kobject_uevent_init(void)
+{
+ netlink_set_nonroot(NETLINK_KOBJECT_UEVENT, NL_NONROOT_RECV);
+ return register_pernet_subsys(&uevent_net_ops);
+}
+
+
postcore_initcall(kobject_uevent_init);
#endif
--
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