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[ATM]: [lec] attempt to support cisco failover 

From: Scott Talbert <scott.talbert@lmco.com>
Signed-off-by: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Scott Talbert 2005-09-29 17:30:54 -07:00 committed by David S. Miller
parent 09e9ec8711
commit 4a7097fcc4
1 changed files with 34 additions and 3 deletions
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37
net/atm/lec.c
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@ -686,9 +686,19 @@ static unsigned char lec_ctrl_magic[] = {
0x01, 0x01,
0x01 }; 0x01 };
#define LEC_DATA_DIRECT_8023 2
#define LEC_DATA_DIRECT_8025 3
static int lec_is_data_direct(struct atm_vcc *vcc)
{
return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
(vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
}
static void static void
lec_push(struct atm_vcc *vcc, struct sk_buff *skb) lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
{ {
unsigned long flags;
struct net_device *dev = (struct net_device *)vcc->proto_data; struct net_device *dev = (struct net_device *)vcc->proto_data;
struct lec_priv *priv = (struct lec_priv *)dev->priv; struct lec_priv *priv = (struct lec_priv *)dev->priv;
@ -728,7 +738,8 @@ lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
skb_queue_tail(&sk->sk_receive_queue, skb); skb_queue_tail(&sk->sk_receive_queue, skb);
sk->sk_data_ready(sk, skb->len); sk->sk_data_ready(sk, skb->len);
} else { /* Data frame, queue to protocol handlers */ } else { /* Data frame, queue to protocol handlers */
unsigned char *dst; struct lec_arp_table *entry;
unsigned char *src, *dst;
atm_return(vcc,skb->truesize); atm_return(vcc,skb->truesize);
if (*(uint16_t *)skb->data == htons(priv->lecid) || if (*(uint16_t *)skb->data == htons(priv->lecid) ||
@ -741,10 +752,30 @@ lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
return; return;
} }
#ifdef CONFIG_TR #ifdef CONFIG_TR
if (priv->is_trdev) dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest; if (priv->is_trdev)
dst = ((struct lecdatahdr_8025 *) skb->data)->h_dest;
else else
#endif #endif
dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; dst = ((struct lecdatahdr_8023 *) skb->data)->h_dest;
/* If this is a Data Direct VCC, and the VCC does not match
* the LE_ARP cache entry, delete the LE_ARP cache entry.
*/
spin_lock_irqsave(&priv->lec_arp_lock, flags);
if (lec_is_data_direct(vcc)) {
#ifdef CONFIG_TR
if (priv->is_trdev)
src = ((struct lecdatahdr_8025 *) skb->data)->h_source;
else
#endif
src = ((struct lecdatahdr_8023 *) skb->data)->h_source;
entry = lec_arp_find(priv, src);
if (entry && entry->vcc != vcc) {
lec_arp_remove(priv, entry);
kfree(entry);
}
}
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
if (!(dst[0]&0x01) && /* Never filter Multi/Broadcast */ if (!(dst[0]&0x01) && /* Never filter Multi/Broadcast */
!priv->is_proxy && /* Proxy wants all the packets */ !priv->is_proxy && /* Proxy wants all the packets */