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[VLAN]: Tag vlan_group_device with net device, not ifindex. 

Currently vlan group is searched using one key - the ifindex.
We'll have to lookup the vlan_group by two keys - ifindex and
net. Turning the vlan_group lookup key to struct net_device
pointer will make this process easier.

Besides, this will eliminate one more place in the networking,
that assumes that indexes are unique in the kernel.

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 00:48:04 -07:00 committed by David S. Miller
parent 669f87baab
commit a9fde26078
2 changed files with 14 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/if_vlan.h
View File

@ -81,7 +81,9 @@ extern void vlan_ioctl_set(int (*hook)(struct net *, void __user *));
#define VLAN_GROUP_ARRAY_PART_LEN (VLAN_GROUP_ARRAY_LEN/VLAN_GROUP_ARRAY_SPLIT_PARTS)
struct vlan_group {
int real_dev_ifindex; /* The ifindex of the ethernet(like) device the vlan is attached to. */
struct net_device *real_dev; /* 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];

22
net/8021q/vlan.c
View File

@ -65,14 +65,14 @@ static inline unsigned int vlan_grp_hashfn(unsigned int idx)
}
/* Must be invoked with RCU read lock (no preempt) */
static struct vlan_group *__vlan_find_group(int real_dev_ifindex)
static struct vlan_group *__vlan_find_group(struct net_device *real_dev)
{
struct vlan_group *grp;
struct hlist_node *n;
int hash = vlan_grp_hashfn(real_dev_ifindex);
int hash = vlan_grp_hashfn(real_dev->ifindex);
hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) {
if (grp->real_dev_ifindex == real_dev_ifindex)
if (grp->real_dev == real_dev)
return grp;
}
@ -86,7 +86,7 @@ static struct vlan_group *__vlan_find_group(int real_dev_ifindex)
struct net_device *__find_vlan_dev(struct net_device *real_dev,
unsigned short VID)
{
struct vlan_group *grp = __vlan_find_group(real_dev->ifindex);
struct vlan_group *grp = __vlan_find_group(real_dev);
if (grp)
return vlan_group_get_device(grp, VID);
@ -103,7 +103,7 @@ static void vlan_group_free(struct vlan_group *grp)
kfree(grp);
}
static struct vlan_group *vlan_group_alloc(int ifindex)
static struct vlan_group *vlan_group_alloc(struct net_device *real_dev)
{
struct vlan_group *grp;
@ -111,9 +111,9 @@ static struct vlan_group *vlan_group_alloc(int ifindex)
if (!grp)
return NULL;
grp->real_dev_ifindex = ifindex;
grp->real_dev = real_dev;
hlist_add_head_rcu(&grp->hlist,
&vlan_group_hash[vlan_grp_hashfn(ifindex)]);
&vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]);
return grp;
}
@ -151,7 +151,7 @@ void unregister_vlan_dev(struct net_device *dev)
ASSERT_RTNL();
grp = __vlan_find_group(real_dev->ifindex);
grp = __vlan_find_group(real_dev);
BUG_ON(!grp);
vlan_proc_rem_dev(dev);
@ -246,9 +246,9 @@ int register_vlan_dev(struct net_device *dev)
struct vlan_group *grp, *ngrp = NULL;
int err;
grp = __vlan_find_group(real_dev->ifindex);
grp = __vlan_find_group(real_dev);
if (!grp) {
ngrp = grp = vlan_group_alloc(real_dev->ifindex);
ngrp = grp = vlan_group_alloc(real_dev);
if (!grp)
return -ENOBUFS;
}
@ -412,7 +412,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
goto out;
}
grp = __vlan_find_group(dev->ifindex);
grp = __vlan_find_group(dev);
if (!grp)
goto out;