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vlan: support "loose binding" to the underlying network device

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Currently the UP/DOWN state of VLANs is synchronized to the state of the
underlying device, meaning all VLANs are set down once the underlying
device is set down. This causes all routes to the VLAN devices to vanish.

Add a flag to specify a "loose binding" mode, in which only the operstate
is transfered, but the VLAN device state is independant.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2009-11-25 07:54:54 +00:00 • committed by David S. Miller
parent cc83f6d692
commit 5e75659305
4 changed files with 14 additions and 5 deletions
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1
include/linux/if_vlan.h
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@ -339,6 +339,7 @@ enum vlan_ioctl_cmds {
enum vlan_flags {
VLAN_FLAG_REORDER_HDR = 0x1,
VLAN_FLAG_GVRP = 0x2,
VLAN_FLAG_LOOSE_BINDING = 0x4,
};
enum vlan_name_types {