On 11/21/18 1:25 AM, Nilesh Javali wrote:
> From: Manish Rangankar <manish.rangan...@cavium.com>
>
> Add packet filter to avoid unnecessary packet processing in iscsiuio.
>
> Signed-off-by: Manish Rangankar <manish.rangan...@cavium.com>
> ---
> drivers/scsi/qedi/qedi_main.c | 24 ++++++++++++++++++++++++
> 1 file changed, 24 insertions(+)
>
> diff --git a/drivers/scsi/qedi/qedi_main.c b/drivers/scsi/qedi/qedi_main.c
> index 713db9c..2621dee 100644
> --- a/drivers/scsi/qedi/qedi_main.c
> +++ b/drivers/scsi/qedi/qedi_main.c
> @@ -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;
>
>
Reviewed-by: Lee Duncan <ldun...@suse.com>
