svn commit: r364185 - head/sys/cam/nvme

[Alexander Motin]

Author: mav
Date: Thu Aug 13 02:32:46 2020
New Revision: 364185
URL: https://svnweb.freebsd.org/changeset/base/364185

Log:
  Fill device serial_num and device_id in NVMe XPT.
  
  It allows to report GEOM::lunid for nda(4) same as for nvd(4).  Since
  NVMe now allows multiple LUs (namespaces) with multiple paths unique
  LU identification is important.  The serial_num field is filled same
  as before with the controller serial number, while device_id is based
  on namespace GUID and/or EUI64 fields as recommended by "NVM Express:
  SCSI Translation Reference" and matching nvd(4) at the end.
  
  MFC after:	1 week

Modified:
  head/sys/cam/nvme/nvme_xpt.c

Modified: head/sys/cam/nvme/nvme_xpt.c
==============================================================================
--- head/sys/cam/nvme/nvme_xpt.c	Thu Aug 13 00:42:09 2020	(r364184)
+++ head/sys/cam/nvme/nvme_xpt.c	Thu Aug 13 02:32:46 2020	(r364185)
@@ -310,9 +310,11 @@ nvme_probe_done(struct cam_periph *periph, union ccb *
 	struct nvme_controller_data *nvme_cdata;
 	nvme_probe_softc *softc;
 	struct cam_path *path;
+	struct scsi_vpd_device_id *did;
+	struct scsi_vpd_id_descriptor *idd;
 	cam_status status;
 	u_int32_t  priority;
-	int found = 1;
+	int found = 1, e, g, len;
 
 	CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("nvme_probe_done\n"));
 
@@ -369,6 +371,21 @@ device_fail:	if ((path->device->flags & CAM_DEV_UNCONF
 		bcopy(&softc->cd, nvme_cdata, sizeof(*nvme_cdata));
 		path->device->nvme_cdata = nvme_cdata;
 
+		/* Save/update serial number. */
+		if (path->device->serial_num != NULL) {
+			free(path->device->serial_num, M_CAMXPT);
+			path->device->serial_num = NULL;
+			path->device->serial_num_len = 0;
+		}
+		path->device->serial_num = (u_int8_t *)
+		    malloc(NVME_SERIAL_NUMBER_LENGTH + 1, M_CAMXPT, M_NOWAIT);
+		if (path->device->serial_num != NULL) {
+			cam_strvis(path->device->serial_num, nvme_cdata->sn,
+			    NVME_SERIAL_NUMBER_LENGTH, NVME_SERIAL_NUMBER_LENGTH + 1);
+			path->device->serial_num_len =
+			    strlen(path->device->serial_num);
+		}
+
 //		nvme_find_quirk(path->device);
 		nvme_device_transport(path);
 		NVME_PROBE_SET_ACTION(softc, NVME_PROBE_IDENTIFY_NS);
@@ -394,6 +411,53 @@ device_fail:	if ((path->device->flags & CAM_DEV_UNCONF
 		bcopy(&softc->ns, nvme_data, sizeof(*nvme_data));
 		path->device->nvme_data = nvme_data;
 
+		/* Save/update device_id based on NGUID and/or EUI64. */
+		if (path->device->device_id != NULL) {
+			free(path->device->device_id, M_CAMXPT);
+			path->device->device_id = NULL;
+			path->device->device_id_len = 0;
+		}
+		len = 0;
+		for (g = 0; g < sizeof(nvme_data->nguid); g++) {
+			if (nvme_data->nguid[g] != 0)
+				break;
+		}
+		if (g < sizeof(nvme_data->nguid))
+			len += sizeof(struct scsi_vpd_id_descriptor) + 16;
+		for (e = 0; e < sizeof(nvme_data->eui64); e++) {
+			if (nvme_data->eui64[e] != 0)
+				break;
+		}
+		if (e < sizeof(nvme_data->eui64))
+			len += sizeof(struct scsi_vpd_id_descriptor) + 8;
+		if (len > 0) {
+			path->device->device_id = (u_int8_t *)
+			    malloc(SVPD_DEVICE_ID_HDR_LEN + len,
+			    M_CAMXPT, M_NOWAIT);
+		}
+		if (path->device->device_id != NULL) {
+			did = (struct scsi_vpd_device_id *)path->device->device_id;
+			did->device = SID_QUAL_LU_CONNECTED | T_DIRECT;
+			did->page_code = SVPD_DEVICE_ID;
+			scsi_ulto2b(len, did->length);
+			idd = (struct scsi_vpd_id_descriptor *)(did + 1);
+			if (g < sizeof(nvme_data->nguid)) {
+				idd->proto_codeset = SVPD_ID_CODESET_BINARY;
+				idd->id_type = SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_EUI64;
+				idd->length = 16;
+				bcopy(nvme_data->nguid, idd->identifier, 16);
+				idd = (struct scsi_vpd_id_descriptor *)
+				    &idd->identifier[16];
+			}
+			if (e < sizeof(nvme_data->eui64)) {
+				idd->proto_codeset = SVPD_ID_CODESET_BINARY;
+				idd->id_type = SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_EUI64;
+				idd->length = 8;
+				bcopy(nvme_data->eui64, idd->identifier, 8);
+			}
+			path->device->device_id_len = SVPD_DEVICE_ID_HDR_LEN + len;
+		}
+
 		if (periph->path->device->flags & CAM_DEV_UNCONFIGURED) {
 			path->device->flags &= ~CAM_DEV_UNCONFIGURED;
 			xpt_acquire_device(path->device);
@@ -546,9 +610,9 @@ nvme_alloc_device(struct cam_eb *bus, struct cam_et *t
 	device->maxtags = 0;
 	device->inq_flags = 0;
 	device->queue_flags = 0;
-	device->device_id = NULL;	/* XXX Need to set this somewhere */
+	device->device_id = NULL;
 	device->device_id_len = 0;
-	device->serial_num = NULL;	/* XXX Need to set this somewhere */
+	device->serial_num = NULL;
 	device->serial_num_len = 0;
 	return (device);
 }