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[VLAN]: Keep track of number of QoS mappings

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Keep track of the number of configured ingress/egress QoS mappings to
avoid iteration while calculating the netlink attribute size.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-06-13 12:07:22 -07:00 committed by David S. Miller
parent 734423cf38
commit b020cb4885
2 changed files with 24 additions and 6 deletions
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3
include/linux/if_vlan.h
View file

@ -112,7 +112,10 @@ struct vlan_dev_info {
/** This will be the mapping that correlates skb->priority to
* 3 bits of VLAN QOS tags...
*/
unsigned int nr_ingress_mappings;
u32 ingress_priority_map[8];
unsigned int nr_egress_mappings;
struct vlan_priority_tci_mapping *egress_priority_map[16]; /* hash table */
unsigned short vlan_id; /* The VLAN Identifier for this interface. */

27
net/8021q/vlan_dev.c
View file

@ -537,35 +537,50 @@ int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
void vlan_dev_set_ingress_priority(const struct net_device *dev,
u32 skb_prio, short vlan_prio)
{
VLAN_DEV_INFO(dev)->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
vlan->nr_ingress_mappings--;
else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
vlan->nr_ingress_mappings++;
vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
}
int vlan_dev_set_egress_priority(const struct net_device *dev,
u32 skb_prio, short vlan_prio)
{
struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
struct vlan_priority_tci_mapping *mp = NULL;
struct vlan_priority_tci_mapping *np;
u32 vlan_qos = (vlan_prio << 13) & 0xE000;
/* See if a priority mapping exists.. */
mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF];
mp = vlan->egress_priority_map[skb_prio & 0xF];
while (mp) {
if (mp->priority == skb_prio) {
mp->vlan_qos = ((vlan_prio << 13) & 0xE000);
if (mp->vlan_qos && !vlan_qos)
vlan->nr_egress_mappings--;
else if (!mp->vlan_qos && vlan_qos)
vlan->nr_egress_mappings++;
mp->vlan_qos = vlan_qos;
return 0;
}
mp = mp->next;
}
/* Create a new mapping then. */
mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF];
mp = vlan->egress_priority_map[skb_prio & 0xF];
np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
if (!np)
return -ENOBUFS;
np->next = mp;
np->priority = skb_prio;
np->vlan_qos = ((vlan_prio << 13) & 0xE000);
VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF] = np;
np->vlan_qos = vlan_qos;
vlan->egress_priority_map[skb_prio & 0xF] = np;
if (vlan_qos)
vlan->nr_egress_mappings++;
return 0;
}