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vlan: Add GVRP support

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Add GVRP support for dynamically registering VLANs with switches.

By default GVRP is disabled because we only support the applicant-only
participant model, which means it should not be enabled on vlans that
are members of a bridge. Since there is currently no way to cleanly
determine that, the user is responsible for enabling it.

The code is pretty small and low impact, its wrapped in a config
option though because it depends on the GARP implementation and
the STP core.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy
2008-07-05 21:26:57 -07:00
committed by David S. Miller
parent ce305002e1
commit 70c03b49b8
9 changed files with 134 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
net/8021q/vlan_dev.c
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@@ -512,10 +512,17 @@ int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
struct vlan_dev_info *vlan = vlan_dev_info(dev);
u32 old_flags = vlan->flags;
if (mask & ~VLAN_FLAG_REORDER_HDR)
if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP))
return -EINVAL;
vlan->flags = (old_flags & ~mask) | (flags & mask);
if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
if (vlan->flags & VLAN_FLAG_GVRP)
vlan_gvrp_request_join(dev);
else
vlan_gvrp_request_leave(dev);
}
return 0;
}
@@ -550,12 +557,19 @@ static int vlan_dev_open(struct net_device *dev)
if (dev->flags & IFF_PROMISC)
dev_set_promiscuity(real_dev, 1);
if (vlan->flags & VLAN_FLAG_GVRP)
vlan_gvrp_request_join(dev);
return 0;
}
static int vlan_dev_stop(struct net_device *dev)
{
struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
struct vlan_dev_info *vlan = vlan_dev_info(dev);
struct net_device *real_dev = vlan->real_dev;
if (vlan->flags & VLAN_FLAG_GVRP)
vlan_gvrp_request_leave(dev);
dev_mc_unsync(real_dev, dev);
dev_unicast_unsync(real_dev, dev);