Date: Tue, 12 Feb 2019 17:07:15 +0000 (UTC) From: Ram Kishore Vegesna <ram@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r344055 - stable/12/sys/dev/ocs_fc Message-ID: <201902121707.x1CH7Fik047838@repo.freebsd.org>
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Author: ram Date: Tue Feb 12 17:07:15 2019 New Revision: 344055 URL: https://svnweb.freebsd.org/changeset/base/344055 Log: MFC r342946: Remove accessing remote node and domain objects while processing cam actions. Issue: ocs_fc(4) driver panics. It's induced by setting the port_state sysctl to offline, then online, then offline, then online, and so forth and so on in rapid succession. Reason: While we set the port_state to online fc discovery will start and OS is enumerating the target discs by calling ocs_action(), then set the port state to "offline" which deletes domain/sport/nodes. In ocs_action()->XPT_GET_TRAN_SETTINGS we are accessing the remote node which can be invalid to get the wwpn, wwnn and port. Fix: Removed accessing of remote node and domain in some ocs_action() cases. Populated the required values from ocs_fcport. This removes the dependency of node and domain structures while processing XPT_PATH_INQ and XPT_GET_TRAN_SETTINGS. We will invalidate the target entries after the device lost timeout(30 seconds). Approved by:ken,mav Modified: stable/12/sys/dev/ocs_fc/ocs.h stable/12/sys/dev/ocs_fc/ocs_cam.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/dev/ocs_fc/ocs.h ============================================================================== --- stable/12/sys/dev/ocs_fc/ocs.h Tue Feb 12 17:05:59 2019 (r344054) +++ stable/12/sys/dev/ocs_fc/ocs.h Tue Feb 12 17:07:15 2019 (r344055) @@ -84,6 +84,7 @@ typedef struct ocs_fcport_s { struct cam_sim *sim; struct cam_path *path; uint32_t role; + uint32_t fc_id; ocs_fc_target_t tgt[OCS_MAX_TARGETS]; int lost_device_time; Modified: stable/12/sys/dev/ocs_fc/ocs_cam.c ============================================================================== --- stable/12/sys/dev/ocs_fc/ocs_cam.c Tue Feb 12 17:05:59 2019 (r344054) +++ stable/12/sys/dev/ocs_fc/ocs_cam.c Tue Feb 12 17:07:15 2019 (r344055) @@ -886,9 +886,11 @@ int32_t ocs_scsi_ini_new_sport(ocs_sport_t *sport) { ocs_t *ocs = sport->ocs; + ocs_fcport *fcp = FCPORT(ocs, 0); - if(!sport->is_vport) { - sport->tgt_data = FCPORT(ocs, 0); + if (!sport->is_vport) { + sport->tgt_data = fcp; + fcp->fc_id = sport->fc_id; } return 0; @@ -911,6 +913,12 @@ ocs_scsi_ini_new_sport(ocs_sport_t *sport) void ocs_scsi_ini_del_sport(ocs_sport_t *sport) { + ocs_t *ocs = sport->ocs; + ocs_fcport *fcp = FCPORT(ocs, 0); + + if (!sport->is_vport) { + fcp->fc_id = 0; + } } void @@ -1984,6 +1992,7 @@ ocs_action(struct cam_sim *sim, union ccb *ccb) { struct ccb_pathinq *cpi = &ccb->cpi; struct ccb_pathinq_settings_fc *fc = &cpi->xport_specific.fc; + ocs_fcport *fcp = FCPORT(ocs, bus); uint64_t wwn = 0; ocs_xport_stats_t value; @@ -2011,9 +2020,7 @@ ocs_action(struct cam_sim *sim, union ccb *ccb) wwn = *((uint64_t *)ocs_scsi_get_property_ptr(ocs, OCS_SCSI_WWNN)); fc->wwnn = be64toh(wwn); - if (ocs->domain && ocs->domain->attached) { - fc->port = ocs->domain->sport->fc_id; - } + fc->port = fcp->fc_id; if (ocs->config_tgt) { cpi->target_sprt = @@ -2059,7 +2066,7 @@ ocs_action(struct cam_sim *sim, union ccb *ccb) struct ccb_trans_settings_fc *fc = &cts->xport_specific.fc; ocs_xport_stats_t value; ocs_fcport *fcp = FCPORT(ocs, bus); - ocs_node_t *fnode = NULL; + ocs_fc_target_t *tgt = NULL; if (ocs->ocs_xport != OCS_XPORT_FC) { ocs_set_ccb_status(ccb, CAM_REQ_INVALID); @@ -2067,13 +2074,19 @@ ocs_action(struct cam_sim *sim, union ccb *ccb) break; } - fnode = ocs_node_get_instance(ocs, fcp->tgt[cts->ccb_h.target_id].node_id); - if (fnode == NULL) { + if (cts->ccb_h.target_id > OCS_MAX_TARGETS) { ocs_set_ccb_status(ccb, CAM_DEV_NOT_THERE); xpt_done(ccb); break; } + tgt = &fcp->tgt[cts->ccb_h.target_id]; + if (tgt->state == OCS_TGT_STATE_NONE) { + ocs_set_ccb_status(ccb, CAM_DEV_NOT_THERE); + xpt_done(ccb); + break; + } + cts->protocol = PROTO_SCSI; cts->protocol_version = SCSI_REV_SPC2; cts->transport = XPORT_FC; @@ -2086,11 +2099,11 @@ ocs_action(struct cam_sim *sim, union ccb *ccb) ocs_xport_status(ocs->xport, OCS_XPORT_LINK_SPEED, &value); fc->bitrate = value.value * 100; - fc->wwpn = ocs_node_get_wwpn(fnode); + fc->wwpn = tgt->wwpn; - fc->wwnn = ocs_node_get_wwnn(fnode); + fc->wwnn = tgt->wwnn; - fc->port = fnode->rnode.fc_id; + fc->port = tgt->port_id; fc->valid = CTS_FC_VALID_SPEED | CTS_FC_VALID_WWPN |
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