From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yi Zou Subject: [PATCH 4/4] libfc: improve flogi retries to avoid lport stuck Date: Fri, 28 Oct 2011 11:34:23 -0700 Message-ID: <20111028183423.15165.43499.stgit@localhost6.localdomain6> References: <20111028183305.15165.96974.stgit@localhost6.localdomain6> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: Received: from mga11.intel.com ([192.55.52.93]:39686 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933096Ab1J1Sp5 (ORCPT ); Fri, 28 Oct 2011 14:45:57 -0400 In-Reply-To: <20111028183305.15165.96974.stgit@localhost6.localdomain6> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Cc: robert.w.love@intel.com, Vasu Dev , Yi Zou From: Vasu Dev Adds more cases to do flogi retry, now also retry on getting bad response due to either no ELS response or flogi response payload length not large enough. In those cases flogi was not retried and that was leaving lport offline. Signed-off-by: Vasu Dev Tested-by: Bhanu Prakash Gollapudi Signed-off-by: Yi Zou --- drivers/scsi/fcoe/fcoe.c | 13 ++---- drivers/scsi/libfc/fc_lport.c | 90 ++++++++++++++++++++++------------------- 2 files changed, 54 insertions(+), 49 deletions(-) diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c index 66fbff9..04686b5 100644 --- a/drivers/scsi/fcoe/fcoe.c +++ b/drivers/scsi/fcoe/fcoe.c @@ -2365,14 +2365,11 @@ static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) goto done; mac = fr_cb(fp)->granted_mac; - if (is_zero_ether_addr(mac)) { - /* pre-FIP */ - if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { - fc_frame_free(fp); - return; - } - } - fcoe_update_src_mac(lport, mac); + /* pre-FIP */ + if (is_zero_ether_addr(mac)) + fcoe_ctlr_recv_flogi(fip, lport, fp); + if (!is_zero_ether_addr(mac)) + fcoe_update_src_mac(lport, mac); done: fc_lport_flogi_resp(seq, fp, lport); } diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c index e0fb891..2cb12b9 100644 --- a/drivers/scsi/libfc/fc_lport.c +++ b/drivers/scsi/libfc/fc_lport.c @@ -1473,6 +1473,7 @@ void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, void *lp_arg) { struct fc_lport *lport = lp_arg; + struct fc_frame_header *fh; struct fc_els_flogi *flp; u32 did; u16 csp_flags; @@ -1500,49 +1501,56 @@ void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, goto err; } + fh = fc_frame_header_get(fp); did = fc_frame_did(fp); - if (fc_frame_payload_op(fp) == ELS_LS_ACC && did) { - flp = fc_frame_payload_get(fp, sizeof(*flp)); - if (flp) { - mfs = ntohs(flp->fl_csp.sp_bb_data) & - FC_SP_BB_DATA_MASK; - if (mfs >= FC_SP_MIN_MAX_PAYLOAD && - mfs < lport->mfs) - lport->mfs = mfs; - csp_flags = ntohs(flp->fl_csp.sp_features); - r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); - e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); - if (csp_flags & FC_SP_FT_EDTR) - e_d_tov /= 1000000; - - lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); - - if ((csp_flags & FC_SP_FT_FPORT) == 0) { - if (e_d_tov > lport->e_d_tov) - lport->e_d_tov = e_d_tov; - lport->r_a_tov = 2 * e_d_tov; - fc_lport_set_port_id(lport, did, fp); - printk(KERN_INFO "host%d: libfc: " - "Port (%6.6x) entered " - "point-to-point mode\n", - lport->host->host_no, did); - fc_lport_ptp_setup(lport, fc_frame_sid(fp), - get_unaligned_be64( - &flp->fl_wwpn), - get_unaligned_be64( - &flp->fl_wwnn)); - } else { - lport->e_d_tov = e_d_tov; - lport->r_a_tov = r_a_tov; - fc_host_fabric_name(lport->host) = - get_unaligned_be64(&flp->fl_wwnn); - fc_lport_set_port_id(lport, did, fp); - fc_lport_enter_dns(lport); - } - } - } else { - FC_LPORT_DBG(lport, "FLOGI RJT or bad response\n"); + if (fh->fh_r_ctl != FC_RCTL_ELS_REP || did == 0 || + fc_frame_payload_op(fp) != ELS_LS_ACC) { + FC_LPORT_DBG(lport, "FLOGI not accepted or bad response\n"); fc_lport_error(lport, fp); + goto err; + } + + flp = fc_frame_payload_get(fp, sizeof(*flp)); + if (!flp) { + FC_LPORT_DBG(lport, "FLOGI bad response\n"); + fc_lport_error(lport, fp); + goto err; + } + + mfs = ntohs(flp->fl_csp.sp_bb_data) & + FC_SP_BB_DATA_MASK; + if (mfs >= FC_SP_MIN_MAX_PAYLOAD && + mfs < lport->mfs) + lport->mfs = mfs; + csp_flags = ntohs(flp->fl_csp.sp_features); + r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); + e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); + if (csp_flags & FC_SP_FT_EDTR) + e_d_tov /= 1000000; + + lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); + + if ((csp_flags & FC_SP_FT_FPORT) == 0) { + if (e_d_tov > lport->e_d_tov) + lport->e_d_tov = e_d_tov; + lport->r_a_tov = 2 * e_d_tov; + fc_lport_set_port_id(lport, did, fp); + printk(KERN_INFO "host%d: libfc: " + "Port (%6.6x) entered " + "point-to-point mode\n", + lport->host->host_no, did); + fc_lport_ptp_setup(lport, fc_frame_sid(fp), + get_unaligned_be64( + &flp->fl_wwpn), + get_unaligned_be64( + &flp->fl_wwnn)); + } else { + lport->e_d_tov = e_d_tov; + lport->r_a_tov = r_a_tov; + fc_host_fabric_name(lport->host) = + get_unaligned_be64(&flp->fl_wwnn); + fc_lport_set_port_id(lport, did, fp); + fc_lport_enter_dns(lport); } out: