svn commit: r352201 - in head/sys/cam: . scsi

[Alexander Motin]

Author: mav
Date: Wed Sep 11 03:25:30 2019
New Revision: 352201
URL: https://svnweb.freebsd.org/changeset/base/352201

Log:
  Fix assumptions of only one device per SES slot.
  
  It is typical to have one, but no longer true for multi-actuator HDDs
  with separate LUN for each actuator.
  
  MFC after:	4 days
  Sponsored by:	iXsystems, Inc.

Modified:
  head/sys/cam/cam_periph.c
  head/sys/cam/scsi/scsi_enc_ses.c

Modified: head/sys/cam/cam_periph.c
==============================================================================
--- head/sys/cam/cam_periph.c	Tue Sep 10 23:51:46 2019	(r352200)
+++ head/sys/cam/cam_periph.c	Wed Sep 11 03:25:30 2019	(r352201)
@@ -402,7 +402,9 @@ retry:
 	}
 	xpt_unlock_buses();
 	sbuf_finish(&local_sb);
-	sbuf_cpy(sb, sbuf_data(&local_sb));
+	if (sbuf_len(sb) != 0)
+		sbuf_cat(sb, ",");
+	sbuf_cat(sb, sbuf_data(&local_sb));
 	sbuf_delete(&local_sb);
 	return (count);
 }

Modified: head/sys/cam/scsi/scsi_enc_ses.c
==============================================================================
--- head/sys/cam/scsi/scsi_enc_ses.c	Tue Sep 10 23:51:46 2019	(r352200)
+++ head/sys/cam/scsi/scsi_enc_ses.c	Wed Sep 11 03:25:30 2019	(r352201)
@@ -883,6 +883,7 @@ ses_path_iter_devid_callback(enc_softc_t *enc, enc_ele
 	struct device_match_result  *device_match;
 	struct device_match_pattern *device_pattern;
 	ses_path_iter_args_t	    *args;
+	struct cam_path		    *path;
 
 	args = (ses_path_iter_args_t *)arg;
 	match_pattern.type = DEV_MATCH_DEVICE;
@@ -908,23 +909,26 @@ ses_path_iter_devid_callback(enc_softc_t *enc, enc_ele
 	cdm.match_buf_len   = sizeof(match_result);
 	cdm.matches         = &match_result;
 
-	xpt_action((union ccb *)&cdm);
-	xpt_free_path(cdm.ccb_h.path);
+	do {
+		xpt_action((union ccb *)&cdm);
 
-	if ((cdm.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP
-	 || (cdm.status != CAM_DEV_MATCH_LAST
-	  && cdm.status != CAM_DEV_MATCH_MORE)
-	 || cdm.num_matches == 0)
-		return;
+		if ((cdm.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP ||
+		    (cdm.status != CAM_DEV_MATCH_LAST &&
+		     cdm.status != CAM_DEV_MATCH_MORE) ||
+		    cdm.num_matches == 0)
+			break;
 
-	device_match = &match_result.result.device_result;
-	if (xpt_create_path(&cdm.ccb_h.path, /*periph*/NULL,
-			     device_match->path_id,
-			     device_match->target_id,
-			     device_match->target_lun) != CAM_REQ_CMP)
-		return;
+		device_match = &match_result.result.device_result;
+		if (xpt_create_path(&path, /*periph*/NULL,
+				    device_match->path_id,
+				    device_match->target_id,
+				    device_match->target_lun) == CAM_REQ_CMP) {
 
-	args->callback(enc, elem, cdm.ccb_h.path, args->callback_arg);
+			args->callback(enc, elem, path, args->callback_arg);
+
+			xpt_free_path(path);
+		}
+	} while (cdm.status == CAM_DEV_MATCH_MORE);
 
 	xpt_free_path(cdm.ccb_h.path);
 }