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

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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>
This commit is contained in:
Pavel Emelyanov 2008-04-16 00:49:09 -07:00 committed by David S. Miller
parent a9fde26078
commit d9ed0f0e2d
2 changed files with 51 additions and 0 deletions
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46
net/8021q/vlan.c
View file

@ -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 @@ static int vlan_ioctl_handler(struct net *net, void __user *arg)
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 @@ static int __init vlan_proto_init(void)
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();
}

5
net/8021q/vlan.h
View file

@ -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__) */