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Commit cdd3ff87 authored by Manish Rangankar's avatar Manish Rangankar Committed by Martin K. Petersen
Browse files

scsi: qedi: Add packet filter in light L2 Rx path. 



Add packet filter to avoid unnecessary packet processing in iscsiuio.

Signed-off-by: default avatarManish Rangankar <manish.rangankar@cavium.com>
Reviewed-by: default avatarLee Duncan <lduncan@suse.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent d5632b11

drivers/scsi/qedi/qedi_main.c

+24 −0
Original line number Diff line number Diff line
@@ -659,6 +659,7 @@ static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2) 
	struct qedi_uio_dev *udev;

	struct qedi_uio_ctrl *uctrl;

	struct skb_work_list *work;

	struct ethhdr *eh;

	u32 prod;



	if (!qedi) {
@@ -673,6 +674,29 @@ static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2) 
		return 0;

	}



	eh = (struct ethhdr *)skb->data;

	/* Undo VLAN encapsulation */

	if (eh->h_proto == htons(ETH_P_8021Q)) {

		memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);

		eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);

		skb_reset_mac_header(skb);

	}



	/* Filter out non FIP/FCoE frames here to free them faster */

	if (eh->h_proto != htons(ETH_P_ARP) &&

	    eh->h_proto != htons(ETH_P_IP) &&

	    eh->h_proto != htons(ETH_P_IPV6)) {

		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,

			  "Dropping frame ethertype [0x%x] len [0x%x].\n",

			  eh->h_proto, skb->len);

		kfree_skb(skb);

		return 0;

	}



	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,

		  "Allowed frame ethertype [0x%x] len [0x%x].\n",

		  eh->h_proto, skb->len);



	udev = qedi->udev;

	uctrl = udev->uctrl;