[VLAN]: Introduce the vlan_net structure and init/exit net ops.

Unlike TUN, it is empty from the very beginning, and will
be eventually populated later.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index cf8d810..9296601 100644 (file)
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -32,6 +32,7 @@
 #include <linux/rtnetlink.h>
 #include <linux/notifier.h>
 #include <net/net_namespace.h>
+#include <net/netns/generic.h>
 
 #include <linux/if_vlan.h>
 #include "vlan.h"
@@ -41,6 +42,8 @@
 
 /* Global VLAN variables */
 
+int vlan_net_id;
+
 /* Our listing of VLAN group(s) */
 static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE];
 
@@ -625,6 +628,41 @@ out:
        return err;
 }
 
+static int vlan_init_net(struct net *net)
+{
+       int err;
+       struct vlan_net *vn;
+
+       err = -ENOMEM;
+       vn = kzalloc(sizeof(struct vlan_net), GFP_KERNEL);
+       if (vn == NULL)
+               goto err_alloc;
+
+       err = net_assign_generic(net, vlan_net_id, vn);
+       if (err < 0)
+               goto err_assign;
+
+       return 0;
+
+err_assign:
+       kfree(vn);
+err_alloc:
+       return err;
+}
+
+static void vlan_exit_net(struct net *net)
+{
+       struct vlan_net *vn;
+
+       vn = net_generic(net, vlan_net_id);
+       kfree(vn);
+}
+
+static struct pernet_operations vlan_net_ops = {
+       .init = vlan_init_net,
+       .exit = vlan_exit_net,
+};
+
 static int __init vlan_proto_init(void)
 {
        int err;
@@ -632,6 +670,10 @@ static int __init vlan_proto_init(void)
        pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright);
        pr_info("All bugs added by %s\n", vlan_buggyright);
 
+       err = register_pernet_gen_device(&vlan_net_id, &vlan_net_ops);
+       if (err < 0)
+               goto err0;
+
        err = vlan_proc_init();
        if (err < 0)
                goto err1;
@@ -653,6 +695,8 @@ err3:
 err2:
        vlan_proc_cleanup();
 err1:
+       unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops);
+err0:
        return err;
 }
 
@@ -673,6 +717,8 @@ static void __exit vlan_cleanup_module(void)
 
        vlan_proc_cleanup();
 
+       unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops);
+
        synchronize_net();
 }
 

diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index 51271ae..f27d8d6 100644 (file)
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -50,4 +50,9 @@ static inline int is_vlan_dev(struct net_device *dev)
        return dev->priv_flags & IFF_802_1Q_VLAN;
 }
 
+extern int vlan_net_id;
+
+struct vlan_net {
+};
+
 #endif /* !(__BEN_VLAN_802_1Q_INC__) */