static struct vlan_group *vlan_group_alloc(int ifindex)
{
struct vlan_group *grp;
unsigned int size;
unsigned int i;
grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL);
if (!grp)
return NULL;
size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) {
grp->vlan_devices_arrays[i] = kzalloc(size, GFP_KERNEL);
if (!grp->vlan_devices_arrays[i])
goto err;
}
grp->real_dev_ifindex = ifindex;
hlist_add_head_rcu(&grp->hlist,
&vlan_group_hash[vlan_grp_hashfn(ifindex)]);
return grp;
err:
vlan_group_free(grp);
return NULL;
}
/* Must hold vlan_group_lock. */
static void __grp_hash(struct vlan_group *grp)
{
struct vlan_group **head;
head = &vlan_group_hash[vlan_grp_hashfn(grp->real_dev_ifindex)];
grp->next = *head;
*head = grp;
}
/* Must hold vlan_group_lock. */
static void __grp_unhash(struct vlan_group *grp)
{
struct vlan_group *next, **pprev;
pprev = &vlan_group_hash[vlan_grp_hashfn(grp->real_dev_ifindex)];
next = *pprev;
while (next != grp) {
pprev = &next->next;
next = *pprev;
}
*pprev = grp->next;
}
/* Must be invoked with vlan_group_lock held. */
static struct vlan_group *__vlan_find_group(int real_dev_ifindex)
{
struct vlan_group *grp;
for (grp = vlan_group_hash[vlan_grp_hashfn(real_dev_ifindex)];
grp != NULL;
grp = grp->next) {
if (grp->real_dev_ifindex == real_dev_ifindex)
break;
}
return grp;
}
