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authorPatrick McHardy <kaber@trash.net>2008-01-21 00:25:50 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-28 15:08:31 -0800
commitaf30151709bcace1ca844d4bb8b7e2e392ff81eb (patch)
tree5da346ea833fe8097359613463cd716613359215 /include/linux/if_vlan.h
parentacc5efbcd2a023c8801f2bba39971cf93812ce7c (diff)
downloadop-kernel-dev-af30151709bcace1ca844d4bb8b7e2e392ff81eb.zip
op-kernel-dev-af30151709bcace1ca844d4bb8b7e2e392ff81eb.tar.gz
[VLAN]: Simplify vlan unregistration
Keep track of the number of VLAN devices in a vlan group. This allows to have the caller sense when the group is going to be destroyed and stop using it, which in turn allows to remove the wrapper around unregister_vlan_dev for the NETDEV_UNREGISTER notifier and avoid iterating over all possible VLAN ids whenever a device in unregistered. Also fix what looks like a use-after-free (but is actually safe since we're holding the RTNL), the real_dev reference should not be dropped while we still use it. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/if_vlan.h')
-rw-r--r--include/linux/if_vlan.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 07db416..129fa87 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -82,6 +82,7 @@ extern void vlan_ioctl_set(int (*hook)(struct net *, void __user *));
struct vlan_group {
int real_dev_ifindex; /* The ifindex of the ethernet(like) device the vlan is attached to. */
+ unsigned int nr_vlans;
struct hlist_node hlist; /* linked list */
struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS];
struct rcu_head rcu;
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