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net/8021q: Implement Multiple VLAN Registration Protocol (MVRP) 

Initial implementation of the Multiple VLAN Registration Protocol
(MVRP) from IEEE 802.1Q-2011, based on the existing implementation
of the GARP VLAN Registration Protocol (GVRP).

Signed-off-by: David Ward <david.ward@ll.mit.edu>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ward 2013-02-08 17:17:07 +00:00 committed by David S. Miller
parent febf018d22
commit 86fbe9bb59
9 changed files with 136 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/uapi/linux/if_ether.h
View File

@ -83,6 +83,7 @@
#define ETH_P_802_EX1 0x88B5 /* 802.1 Local Experimental 1. */
#define ETH_P_TIPC 0x88CA /* TIPC */
#define ETH_P_8021AH 0x88E7 /* 802.1ah Backbone Service Tag */
#define ETH_P_MVRP 0x88F5 /* 802.1Q MVRP */
#define ETH_P_1588 0x88F7 /* IEEE 1588 Timesync */
#define ETH_P_FCOE 0x8906 /* Fibre Channel over Ethernet */
#define ETH_P_TDLS 0x890D /* TDLS */

1
include/uapi/linux/if_vlan.h
View File

@ -34,6 +34,7 @@ enum vlan_flags {
VLAN_FLAG_REORDER_HDR = 0x1,
VLAN_FLAG_GVRP = 0x2,
VLAN_FLAG_LOOSE_BINDING = 0x4,
VLAN_FLAG_MVRP = 0x8,
};
enum vlan_name_types {

11
net/8021q/Kconfig
View File

@ -27,3 +27,14 @@ config VLAN_8021Q_GVRP
automatic propagation of registered VLANs to switches.
If unsure, say N.
config VLAN_8021Q_MVRP
bool "MVRP (Multiple VLAN Registration Protocol) support"
depends on VLAN_8021Q
select MRP
help
Select this to enable MVRP end-system support. MVRP is used for
automatic propagation of registered VLANs to switches; it
supersedes GVRP and is not backwards-compatible.
If unsure, say N.

1
net/8021q/Makefile
View File

@ -6,5 +6,6 @@ obj-$(CONFIG_VLAN_8021Q) += 8021q.o
8021q-y := vlan.o vlan_dev.o vlan_netlink.o
8021q-$(CONFIG_VLAN_8021Q_GVRP) += vlan_gvrp.o
8021q-$(CONFIG_VLAN_8021Q_MVRP) += vlan_mvrp.o
8021q-$(CONFIG_PROC_FS) += vlanproc.o

27
net/8021q/vlan.c
View File

@ -95,6 +95,8 @@ void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
grp->nr_vlan_devs--;
if (vlan->flags & VLAN_FLAG_MVRP)
vlan_mvrp_request_leave(dev);
if (vlan->flags & VLAN_FLAG_GVRP)
vlan_gvrp_request_leave(dev);
@ -107,8 +109,10 @@ void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
netdev_upper_dev_unlink(real_dev, dev);
if (grp->nr_vlan_devs == 0)
if (grp->nr_vlan_devs == 0) {
vlan_mvrp_uninit_applicant(real_dev);
vlan_gvrp_uninit_applicant(real_dev);
}
/* Get rid of the vlan's reference to real_dev */
dev_put(real_dev);
@ -151,15 +155,18 @@ int register_vlan_dev(struct net_device *dev)
err = vlan_gvrp_init_applicant(real_dev);
if (err < 0)
goto out_vid_del;
err = vlan_mvrp_init_applicant(real_dev);
if (err < 0)
goto out_uninit_gvrp;
}
err = vlan_group_prealloc_vid(grp, vlan_id);
if (err < 0)
goto out_uninit_applicant;
goto out_uninit_mvrp;
err = netdev_upper_dev_link(real_dev, dev);
if (err)
goto out_uninit_applicant;
goto out_uninit_mvrp;
err = register_netdevice(dev);
if (err < 0)
@ -181,7 +188,10 @@ int register_vlan_dev(struct net_device *dev)
out_upper_dev_unlink:
netdev_upper_dev_unlink(real_dev, dev);
out_uninit_applicant:
out_uninit_mvrp:
if (grp->nr_vlan_devs == 0)
vlan_mvrp_uninit_applicant(real_dev);
out_uninit_gvrp:
if (grp->nr_vlan_devs == 0)
vlan_gvrp_uninit_applicant(real_dev);
out_vid_del:
@ -655,13 +665,19 @@ static int __init vlan_proto_init(void)
if (err < 0)
goto err3;
err = vlan_netlink_init();
err = vlan_mvrp_init();
if (err < 0)
goto err4;
err = vlan_netlink_init();
if (err < 0)
goto err5;
vlan_ioctl_set(vlan_ioctl_handler);
return 0;
err5:
vlan_mvrp_uninit();
err4:
vlan_gvrp_uninit();
err3:
@ -682,6 +698,7 @@ static void __exit vlan_cleanup_module(void)
unregister_pernet_subsys(&vlan_net_ops);
rcu_barrier(); /* Wait for completion of call_rcu()'s */
vlan_mvrp_uninit();
vlan_gvrp_uninit();
}

16
net/8021q/vlan.h
View File

@ -171,6 +171,22 @@ static inline int vlan_gvrp_init(void) { return 0; }
static inline void vlan_gvrp_uninit(void) {}
#endif
#ifdef CONFIG_VLAN_8021Q_MVRP
extern int vlan_mvrp_request_join(const struct net_device *dev);
extern void vlan_mvrp_request_leave(const struct net_device *dev);
extern int vlan_mvrp_init_applicant(struct net_device *dev);
extern void vlan_mvrp_uninit_applicant(struct net_device *dev);
extern int vlan_mvrp_init(void);
extern void vlan_mvrp_uninit(void);
#else
static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; }
static inline void vlan_mvrp_request_leave(const struct net_device *dev) {}
static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; }
static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {}
static inline int vlan_mvrp_init(void) { return 0; }
static inline void vlan_mvrp_uninit(void) {}
#endif
extern const char vlan_fullname[];
extern const char vlan_version[];
extern int vlan_netlink_init(void);

12
net/8021q/vlan_dev.c
View File

@ -261,7 +261,7 @@ int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
u32 old_flags = vlan->flags;
if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
VLAN_FLAG_LOOSE_BINDING))
VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP))
return -EINVAL;
vlan->flags = (old_flags & ~mask) | (flags & mask);
@ -272,6 +272,13 @@ int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
else
vlan_gvrp_request_leave(dev);
}
if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
if (vlan->flags & VLAN_FLAG_MVRP)
vlan_mvrp_request_join(dev);
else
vlan_mvrp_request_leave(dev);
}
return 0;
}
@ -312,6 +319,9 @@ static int vlan_dev_open(struct net_device *dev)
if (vlan->flags & VLAN_FLAG_GVRP)
vlan_gvrp_request_join(dev);
if (vlan->flags & VLAN_FLAG_MVRP)
vlan_mvrp_request_join(dev);
if (netif_carrier_ok(real_dev))
netif_carrier_on(dev);
return 0;

72
net/8021q/vlan_mvrp.c Normal file
View File

@ -0,0 +1,72 @@
/*
* IEEE 802.1Q Multiple VLAN Registration Protocol (MVRP)
*
* Copyright (c) 2012 Massachusetts Institute of Technology
*
* Adapted from code in net/8021q/vlan_gvrp.c
* Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*/
#include <linux/types.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <net/mrp.h>
#include "vlan.h"
#define MRP_MVRP_ADDRESS { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 }
enum mvrp_attributes {
MVRP_ATTR_INVALID,
MVRP_ATTR_VID,
__MVRP_ATTR_MAX
};
#define MVRP_ATTR_MAX (__MVRP_ATTR_MAX - 1)
static struct mrp_application vlan_mrp_app __read_mostly = {
.type = MRP_APPLICATION_MVRP,
.maxattr = MVRP_ATTR_MAX,
.pkttype.type = htons(ETH_P_MVRP),
.group_address = MRP_MVRP_ADDRESS,
.version = 0,
};
int vlan_mvrp_request_join(const struct net_device *dev)
{
const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
__be16 vlan_id = htons(vlan->vlan_id);
return mrp_request_join(vlan->real_dev, &vlan_mrp_app,
&vlan_id, sizeof(vlan_id), MVRP_ATTR_VID);
}
void vlan_mvrp_request_leave(const struct net_device *dev)
{
const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
__be16 vlan_id = htons(vlan->vlan_id);
mrp_request_leave(vlan->real_dev, &vlan_mrp_app,
&vlan_id, sizeof(vlan_id), MVRP_ATTR_VID);
}
int vlan_mvrp_init_applicant(struct net_device *dev)
{
return mrp_init_applicant(dev, &vlan_mrp_app);
}
void vlan_mvrp_uninit_applicant(struct net_device *dev)
{
mrp_uninit_applicant(dev, &vlan_mrp_app);
}
int __init vlan_mvrp_init(void)
{
return mrp_register_application(&vlan_mrp_app);
}
void vlan_mvrp_uninit(void)
{
mrp_unregister_application(&vlan_mrp_app);
}

2
net/8021q/vlan_netlink.c
View File

@ -62,7 +62,7 @@ static int vlan_validate(struct nlattr *tb[], struct nlattr *data[])
flags = nla_data(data[IFLA_VLAN_FLAGS]);
if ((flags->flags & flags->mask) &
~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
VLAN_FLAG_LOOSE_BINDING))
VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP))
return -EINVAL;
}