diff options
| author | Manish Rangankar <manish.rangankar@cavium.com> | 2018-11-21 01:25:20 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-11-28 20:51:47 -0500 |
| commit | cdd3ff87f10813e42ef6573a1c92a91a9fc24709 (patch) | |
| tree | 14d1be7cab53bb1c4eeffa4b4dc83b4cf3f5a9ca | |
| parent | d5632b11f0a17efa6356311e535ae135d178438d (diff) | |
| download | linux-cdd3ff87f10813e42ef6573a1c92a91a9fc24709.tar.bz2 | |
scsi: qedi: Add packet filter in light L2 Rx path.
Add packet filter to avoid unnecessary packet processing in iscsiuio.
Signed-off-by: Manish Rangankar <manish.rangankar@cavium.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/qedi/qedi_main.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/scsi/qedi/qedi_main.c b/drivers/scsi/qedi/qedi_main.c index 713db9cfae7f..2621deeed0cd 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; |