diff options
author | Joe Eykholt <jeykholt@cisco.com> | 2009-11-03 11:49:16 -0800 |
---|---|---|
committer | James Bottomley <James.Bottomley@suse.de> | 2009-12-04 12:01:18 -0600 |
commit | 386309ce927a308d7742a6fb24a536d3383fbd49 (patch) | |
tree | 4e8ddbb895e5bd837020896a1c2505ea8bc3159b /drivers/scsi/fcoe | |
parent | e6d8a1b0b53a156979120dd0593c1867b8ea89d3 (diff) | |
download | linux-386309ce927a308d7742a6fb24a536d3383fbd49.tar.bz2 |
[SCSI] libfcoe: fcoe: simplify receive FLOGI response
There was a locking problem where the fip->lock was held during
the call to update_mac(). The rtnl_lock() must be taken before
the fip->lock, not the other way around. This fixes that.
Now that fcoe_ctlr_recv_flog() is called only from the response handler
to a FLOGI request, some checking can be eliminated. Instead of calling
update_mac(), just fill in the granted_mac address for the passed-in
frame (skb).
Eliminate the passed-in source MAC address since it is also in the skb.
Also, in fcoe, call fcoe_set_src_mac() directly instead of going thru
the fip function pointer. This will generate less code.
Then, since fip isn't needed for LOGO response, use lport as the arg.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/fcoe')
-rw-r--r-- | drivers/scsi/fcoe/fcoe.c | 15 | ||||
-rw-r--r-- | drivers/scsi/fcoe/libfcoe.c | 12 |
2 files changed, 11 insertions, 16 deletions
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c index b15ec996b477..343900ac0ece 100644 --- a/drivers/scsi/fcoe/fcoe.c +++ b/drivers/scsi/fcoe/fcoe.c @@ -2247,15 +2247,12 @@ static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) mac = fr_cb(fp)->granted_mac; if (is_zero_ether_addr(mac)) { /* pre-FIP */ - mac = eth_hdr(&fp->skb)->h_source; - if (fcoe_ctlr_recv_flogi(fip, lport, fp, mac)) { + if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { fc_frame_free(fp); return; } - } else { - /* FIP, libfcoe has already seen it */ - fip->update_mac(lport, fr_cb(fp)->granted_mac); } + fcoe_update_src_mac(lport, mac); done: fc_lport_flogi_resp(seq, fp, lport); } @@ -2271,13 +2268,11 @@ done: */ static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) { - struct fcoe_ctlr *fip = arg; - struct fc_exch *exch = fc_seq_exch(seq); - struct fc_lport *lport = exch->lp; + struct fc_lport *lport = arg; static u8 zero_mac[ETH_ALEN] = { 0 }; if (!IS_ERR(fp)) - fip->update_mac(lport, zero_mac); + fcoe_update_src_mac(lport, zero_mac); fc_lport_logo_resp(seq, fp, lport); } @@ -2312,7 +2307,7 @@ static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) break; return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, - fip, timeout); + lport, timeout); } return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); } diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c index 2aab97221c6c..2988b71d1e87 100644 --- a/drivers/scsi/fcoe/libfcoe.c +++ b/drivers/scsi/fcoe/libfcoe.c @@ -1254,10 +1254,9 @@ static void fcoe_ctlr_recv_work(struct work_struct *recv_work) } /** - * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response or request + * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response * @fip: The FCoE controller * @fp: The FC frame to snoop - * @sa: Ethernet source MAC address from received FCoE frame * * Snoop potential response to FLOGI or even incoming FLOGI. * @@ -1265,16 +1264,18 @@ static void fcoe_ctlr_recv_work(struct work_struct *recv_work) * by fip->flogi_oxid != FC_XID_UNKNOWN. * * The caller is responsible for freeing the frame. + * Fill in the granted_mac address. * * Return non-zero if the frame should not be delivered to libfc. */ int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, - struct fc_frame *fp, u8 *sa) + struct fc_frame *fp) { struct fc_frame_header *fh; u8 op; - u8 mac[ETH_ALEN]; + u8 *sa; + sa = eth_hdr(&fp->skb)->h_source; fh = fc_frame_header_get(fp); if (fh->fh_type != FC_TYPE_ELS) return 0; @@ -1305,9 +1306,8 @@ int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, fip->map_dest = 0; } fip->flogi_oxid = FC_XID_UNKNOWN; - fc_fcoe_set_mac(mac, fh->fh_d_id); - fip->update_mac(lport, mac); spin_unlock_bh(&fip->lock); + fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id); } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { /* * Save source MAC for point-to-point responses. |