net: fix "queues" uevent between network namespaces

When I create a new namespace with 'ip netns add net0', or add/remove
new links in a namespace with 'ip link add/delete type veth', rx/tx
queues events can be got in all namespaces. That is because rx/tx queue
ktypes do not have namespace support, and their kobj parents are setted to
NULL. This patch is to fix it.

Reported-by: Libo Chen <chenlibo@huawei.com>
Signed-off-by: Libo Chen <chenlibo@huawei.com>
Signed-off-by: Weilong Chen <chenweilong@huawei.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 34 insertions, 2 deletions

diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 52e5abbc41db..5f72767ddd9b 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -88,11 +88,17 @@ out:
 #ifdef CONFIG_NET
 static int kobj_bcast_filter(struct sock *dsk, struct sk_buff *skb, void *data)
 {
-        struct kobject *kobj = data;
+        struct kobject *kobj = data, *ksobj;
         const struct kobj_ns_type_operations *ops;
 
         ops = kobj_ns_ops(kobj);
-        if (ops) {
+        if (!ops && kobj->kset) {
+                ksobj = &kobj->kset->kobj;
+                if (ksobj->parent != NULL)
+                        ops = kobj_ns_ops(ksobj->parent);
+        }
+
+        if (ops && ops->netlink_ns && kobj->ktype->namespace) {
                 const void *sock_ns, *ns;
                 ns = kobj->ktype->namespace(kobj);
                 sock_ns = ops->netlink_ns(dsk);
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 7eeadeecc5a2..93886246a0b4 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -744,10 +744,23 @@ static void rx_queue_release(struct kobject *kobj)
         dev_put(queue->dev);
 }
 
+static const void *rx_queue_namespace(struct kobject *kobj)
+{
+        struct netdev_rx_queue *queue = to_rx_queue(kobj);
+        struct device *dev = &queue->dev->dev;
+        const void *ns = NULL;
+
+        if (dev->class && dev->class->ns_type)
+                ns = dev->class->namespace(dev);
+
+        return ns;
+}
+
 static struct kobj_type rx_queue_ktype = {
         .sysfs_ops = &rx_queue_sysfs_ops,
         .release = rx_queue_release,
         .default_attrs = rx_queue_default_attrs,
+        .namespace = rx_queue_namespace
 };
 
 static int rx_queue_add_kobject(struct net_device *net, int index)
@@ -1093,10 +1106,23 @@ static void netdev_queue_release(struct kobject *kobj)
         dev_put(queue->dev);
 }
 
+static const void *netdev_queue_namespace(struct kobject *kobj)
+{
+        struct netdev_queue *queue = to_netdev_queue(kobj);
+        struct device *dev = &queue->dev->dev;
+        const void *ns = NULL;
+
+        if (dev->class && dev->class->ns_type)
+                ns = dev->class->namespace(dev);
+
+        return ns;
+}
+
 static struct kobj_type netdev_queue_ktype = {
         .sysfs_ops = &netdev_queue_sysfs_ops,
         .release = netdev_queue_release,
         .default_attrs = netdev_queue_default_attrs,
+        .namespace = netdev_queue_namespace,
 };
 
 static int netdev_queue_add_kobject(struct net_device *net, int index)