Пример #1
0
/* 
 * (1) len doesn't include the header by default.  I want this. 
 */
static int
aoenet_rcv(struct sk_buff *skb, struct net_device *ifp, struct packet_type *pt, struct net_device *orig_dev)
{
	struct aoe_hdr *h;
	u32 n;

	if (dev_net(ifp) != &init_net)
		goto exit;

	skb = skb_share_check(skb, GFP_ATOMIC);
	if (skb == NULL)
		return 0;
	if (skb_linearize(skb))
		goto exit;
	if (!is_aoe_netif(ifp))
		goto exit;
	skb_push(skb, ETH_HLEN);	/* (1) */

	h = (struct aoe_hdr *) skb_mac_header(skb);
	n = get_unaligned_be32(&h->tag);
	if ((h->verfl & AOEFL_RSP) == 0 || (n & 1<<31))
		goto exit;

	if (h->verfl & AOEFL_ERR) {
		n = h->err;
		if (n > NECODES)
			n = 0;
		if (net_ratelimit())
			printk(KERN_ERR
				"%s%d.%d@%s; ecode=%d '%s'\n",
				"aoe: error packet from ",
				get_unaligned_be16(&h->major),
				h->minor, skb->dev->name,
				h->err, aoe_errlist[n]);
		goto exit;
	}

	switch (h->cmd) {
	case AOECMD_ATA:
		aoecmd_ata_rsp(skb);
		break;
	case AOECMD_CFG:
		aoecmd_cfg_rsp(skb);
		break;
	default:
		printk(KERN_INFO "aoe: unknown cmd %d\n", h->cmd);
	}
exit:
	dev_kfree_skb(skb);
	return 0;
}
Пример #2
0
/* 
 * (1) len doesn't include the header by default.  I want this. 
 */
static int
aoenet_rcv(struct sk_buff *skb, struct net_device *ifp, struct packet_type *pt, struct net_device *orig_dev)
{
	struct aoe_hdr *h;
	u32 n;

	skb = skb_share_check(skb, GFP_ATOMIC);
	if (skb == NULL)
		return 0;
	if (skb_is_nonlinear(skb))
	if (skb_linearize(skb, GFP_ATOMIC) < 0)
		goto exit;
	if (!is_aoe_netif(ifp))
		goto exit;
	skb_push(skb, ETH_HLEN);	/* (1) */

	h = (struct aoe_hdr *) skb->mac.raw;
	n = be32_to_cpu(h->tag);
	if ((h->verfl & AOEFL_RSP) == 0 || (n & 1<<31))
		goto exit;

	if (h->verfl & AOEFL_ERR) {
		n = h->err;
		if (n > NECODES)
			n = 0;
		if (net_ratelimit())
			printk(KERN_ERR "aoe: aoenet_rcv: error packet from %d.%d; "
			       "ecode=%d '%s'\n",
			       be16_to_cpu(h->major), h->minor, 
			       h->err, aoe_errlist[n]);
		goto exit;
	}

	switch (h->cmd) {
	case AOECMD_ATA:
		aoecmd_ata_rsp(skb);
		break;
	case AOECMD_CFG:
		aoecmd_cfg_rsp(skb);
		break;
	default:
		printk(KERN_INFO "aoe: aoenet_rcv: unknown cmd %d\n", h->cmd);
	}
exit:
	dev_kfree_skb(skb);
	return 0;
}