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[SCSI] libfcoe: Support extra MAC descriptor to be used as FCoE MAC

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Some switch implementations (eg., HP virtual connect FlexFabric) send two MAC
descriptors in FIP FLOGI response, with first MAC descriptor (granted_mac) used
as FPMA, and the second one (fcoe_mac) used as destination address for
sending/receiving FCoE packets. fip_mac continues to be used for FIP traffic.
This patch introduces fcoe_mac in fcoe_fcf structure. For regular switches,
both fcoe_mac and fip_mac will be the same. For the switches that send
additional MAC descriptor, fcoe_mac is updated.

Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Bhanu Prakash Gollapudi 2012-03-09 14:50:03 -08:00 committed by James Bottomley
parent 73d67aa40b
commit 81c11dd2ed
2 changed files with 26 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/scsi/fcoe/fcoe_ctlr.c
View File

@ -242,7 +242,7 @@ static void fcoe_ctlr_announce(struct fcoe_ctlr *fip)
printk(KERN_INFO "libfcoe: host%d: FIP selected "
"Fibre-Channel Forwarder MAC %pM\n",
fip->lp->host->host_no, sel->fcf_mac);
memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN);
memcpy(fip->dest_addr, sel->fcoe_mac, ETH_ALEN);
fip->map_dest = 0;
}
unlock:
@ -824,6 +824,7 @@ static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip,
memcpy(fcf->fcf_mac,
((struct fip_mac_desc *)desc)->fd_mac,
ETH_ALEN);
memcpy(fcf->fcoe_mac, fcf->fcf_mac, ETH_ALEN);
if (!is_valid_ether_addr(fcf->fcf_mac)) {
LIBFCOE_FIP_DBG(fip,
"Invalid MAC addr %pM in FIP adv\n",
@ -1013,6 +1014,7 @@ static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
struct fip_desc *desc;
struct fip_encaps *els;
struct fcoe_dev_stats *stats;
struct fcoe_fcf *sel;
enum fip_desc_type els_dtype = 0;
u8 els_op;
u8 sub;
@ -1040,7 +1042,8 @@ static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
goto drop;
/* Drop ELS if there are duplicate critical descriptors */
if (desc->fip_dtype < 32) {
if (desc_mask & 1U << desc->fip_dtype) {
if ((desc->fip_dtype != FIP_DT_MAC) &&
(desc_mask & 1U << desc->fip_dtype)) {
LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
"Descriptors in FIP ELS\n");
goto drop;
@ -1049,17 +1052,32 @@ static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
}
switch (desc->fip_dtype) {
case FIP_DT_MAC:
sel = fip->sel_fcf;
if (desc_cnt == 1) {
LIBFCOE_FIP_DBG(fip, "FIP descriptors "
"received out of order\n");
goto drop;
}
/*
* Some switch implementations send two MAC descriptors,
* with first MAC(granted_mac) being the FPMA, and the
* second one(fcoe_mac) is used as destination address
* for sending/receiving FCoE packets. FIP traffic is
* sent using fip_mac. For regular switches, both
* fip_mac and fcoe_mac would be the same.
*/
if (desc_cnt == 2)
memcpy(granted_mac,
((struct fip_mac_desc *)desc)->fd_mac,
ETH_ALEN);
if (dlen != sizeof(struct fip_mac_desc))
goto len_err;
memcpy(granted_mac,
((struct fip_mac_desc *)desc)->fd_mac,
ETH_ALEN);
if ((desc_cnt == 3) && (sel))
memcpy(sel->fcoe_mac,
((struct fip_mac_desc *)desc)->fd_mac,
ETH_ALEN);
break;
case FIP_DT_FLOGI:
case FIP_DT_FDISC:

4
include/scsi/libfcoe.h
View File

@ -165,7 +165,8 @@ struct fcoe_ctlr {
* @switch_name: WWN of switch from advertisement
* @fabric_name: WWN of fabric from advertisement
* @fc_map: FC_MAP value from advertisement
* @fcf_mac: Ethernet address of the FCF
* @fcf_mac: Ethernet address of the FCF for FIP traffic
* @fcoe_mac: Ethernet address of the FCF for FCoE traffic
* @vfid: virtual fabric ID
* @pri: selection priority, smaller values are better
* @flogi_sent: current FLOGI sent to this FCF
@ -188,6 +189,7 @@ struct fcoe_fcf {
u32 fc_map;
u16 vfid;
u8 fcf_mac[ETH_ALEN];
u8 fcoe_mac[ETH_ALEN];
u8 pri;
u8 flogi_sent;