[VLAN]: Create proc entries in the proper net.

The proc_vlan_dir and proc_vlan_conf migrate on the struct
vlan_net and their creation uses the struct net.

The devices' entries use the corresponding device's net.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/8021q/vlan.h

@@ -52,7 +52,13 @@ static inline int is_vlan_dev(struct net_device *dev)
 
 extern int vlan_net_id;
 
+struct proc_dir_entry;
+
 struct vlan_net {
+	/* /proc/net/vlan */
+	struct proc_dir_entry *proc_vlan_dir;
+	/* /proc/net/vlan/config */
+	struct proc_dir_entry *proc_vlan_conf;
 };
 
 #endif /* !(__BEN_VLAN_802_1Q_INC__) */

net/8021q/vlanproc.c

@@ -34,6 +34,7 @@
 #include <linux/netdevice.h>
 #include <linux/if_vlan.h>
 #include <net/net_namespace.h>
+#include <net/netns/generic.h>
 #include "vlanproc.h"
 #include "vlan.h"
 
@@ -111,18 +112,6 @@ static const struct file_operations vlandev_fops = {
  * Proc filesystem derectory entries.
  */
 
-/*
- *	/proc/net/vlan
- */
-
-static struct proc_dir_entry *proc_vlan_dir;
-
-/*
- *	/proc/net/vlan/config
- */
-
-static struct proc_dir_entry *proc_vlan_conf;
-
 /* Strings */
 static const char *vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = {
     [VLAN_NAME_TYPE_RAW_PLUS_VID]        = "VLAN_NAME_TYPE_RAW_PLUS_VID",
@@ -140,14 +129,13 @@ static const char *vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = {
 
 void vlan_proc_cleanup(struct net *net)
 {
-	if (net != &init_net)
-		return;
+	struct vlan_net *vn = net_generic(net, vlan_net_id);
 
-	if (proc_vlan_conf)
-		remove_proc_entry(name_conf, proc_vlan_dir);
+	if (vn->proc_vlan_conf)
+		remove_proc_entry(name_conf, vn->proc_vlan_dir);
 
-	if (proc_vlan_dir)
-		proc_net_remove(&init_net, name_root);
+	if (vn->proc_vlan_dir)
+		proc_net_remove(net, name_root);
 
 	/* Dynamically added entries should be cleaned up as their vlan_device
 	 * is removed, so we should not have to take care of it here...
@@ -160,16 +148,15 @@ void vlan_proc_cleanup(struct net *net)
 
 int vlan_proc_init(struct net *net)
 {
-	if (net != &init_net)
-		return 0;
+	struct vlan_net *vn = net_generic(net, vlan_net_id);
 
-	proc_vlan_dir = proc_mkdir(name_root, init_net.proc_net);
-	if (!proc_vlan_dir)
+	vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net);
+	if (!vn->proc_vlan_dir)
 		goto err;
 
-	proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR,
-				     proc_vlan_dir, &vlan_fops);
-	if (!proc_vlan_conf)
+	vn->proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR,
+				     vn->proc_vlan_dir, &vlan_fops);
+	if (!vn->proc_vlan_conf)
 		goto err;
 	return 0;
 
@@ -186,9 +173,10 @@ err:
 int vlan_proc_add_dev(struct net_device *vlandev)
 {
 	struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
+	struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
 
 	dev_info->dent = proc_create(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR,
-				     proc_vlan_dir, &vlandev_fops);
+				     vn->proc_vlan_dir, &vlandev_fops);
 	if (!dev_info->dent)
 		return -ENOBUFS;
 
@@ -201,10 +189,12 @@ int vlan_proc_add_dev(struct net_device *vlandev)
  */
 int vlan_proc_rem_dev(struct net_device *vlandev)
 {
+	struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id);
+
 	/** NOTE:  This will consume the memory pointed to by dent, it seems. */
 	if (vlan_dev_info(vlandev)->dent) {
 		remove_proc_entry(vlan_dev_info(vlandev)->dent->name,
-				  proc_vlan_dir);
+				  vn->proc_vlan_dir);
 		vlan_dev_info(vlandev)->dent = NULL;
 	}
 	return 0;