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RWRn5d3Yx35u07Qxi4EC54r0WNFltI4OZgyPPaH5O9rLh8kgNPINxoF79JzXOLYQJLcymJsXfevxMMvJ1++utp3Vok/zXbRkpAU=
--- sbin/scsi/scsi.c.dist	Sun Dec  4 23:50:47 2022
+++ sbin/scsi/scsi.c		Thu May 15 15:55:03 2025
@@ -113,7 +113,8 @@
 			break;
 		case 'f':
 			if ((fd = scsi_open(optarg, O_RDWR)) < 0)
-				err(1, "unable to open device %s", optarg);
+				if ((fd = scsi_open(optarg, O_RDONLY)) < 0)
+					err(1, "unable to open device %s", optarg);
 			fflag = 1;
 			break;
 		case 'd':
@@ -804,10 +805,30 @@
 	 */
 	mh = (struct mode_header *)data;
 	mph = (struct mode_page_header *)(((char *)mh) + sizeof(*mh) + mh->bdl);
-	mode_pars = (char *)mph + sizeof(*mph);
 
+	/*
+	 * If the data length was just block descriptors and the three header bytes, we're done.
+	 */
+
+	if (mh->bdl + 3 >= mh->mdl)
+		return ;
+
+	/*
+	 * Skip mode page header unless we are requesting page 0x3f, (all pages)
+	 */
+
+	mode_pars = (char *)mph + (((page & 0x3f) == 0x3f) ? 0 : sizeof(*mph));
+
+	printf ("*** %02x %02x %02x(r/o) %02x\n", mh->mdl, mh->medium_type, mh->dev_spec_par, mh->bdl);
+
+	if (page != 0x3f) {
+		printf ("Page: 0x%02x Size: 0x%02x\n", *(char *)mph, *(1+(char *)(mph)));
+		}
+
+	printf ("\n");
+
 	if (!fmt) {
-		for (i = 0; i < mh->mdl; i++) {
+		for (i = 0; i < (mh->mdl - mh->bdl - (((page & 0x3f) == 0x3f) ? 3 : 5)); i++) {
 			printf("%02x%c",mode_pars[i],
 			(((i + 1) % 8) == 0) ? '\n' : ' ');
 		}
--- sbin/bioctl/bioctl.c.dist	Mon Apr  7 04:25:01 2025
+++ sbin/bioctl/bioctl.c	Tue May  6 12:26:35 2025
@@ -230,7 +230,8 @@
 	if (devicename == NULL)
 		errx(1, "need device");
 
-	devh = opendev(devicename, O_RDWR, OPENDEV_PART, &realname);
+	devh = opendev(devicename, (func == BIOC_DELETERAID || func == BIOC_INQ ? O_RDONLY : O_RDWR), OPENDEV_PART, &realname);
+
 	if (devh == -1) {
 		devh = open("/dev/bio", O_RDWR);
 		if (devh == -1)
--- sys/dev/softraidvar.h.dist	Mon Apr  7 04:25:11 2025
+++ sys/dev/softraidvar.h	Tue May  6 09:17:54 2025
@@ -535,6 +535,7 @@
 #define SR_CAP_REBUILD		0x00000004	/* Supports rebuild. */
 #define SR_CAP_NON_COERCED	0x00000008	/* Uses non-coerced size. */
 #define SR_CAP_REDUNDANT	0x00000010	/* Redundant copies of data. */
+#define SR_CAP_READONLY		0x00000020	/* Read-only. */
 
 	union {
 	    struct sr_raid0	mdd_raid0;
--- sys/dev/softraid.c.dist	Mon Apr  7 04:42:29 2025
+++ sys/dev/softraid.c		Fri May  9 13:10:01 2025
@@ -334,6 +334,10 @@
 			 * and figure out the open/close dance for unwind.
 			 */
 			error = VOP_OPEN(vn, FREAD | FWRITE, NOCRED, curproc);
+			if (error == EACCES || error == EROFS) {
+				sd->sd_capabilities |= SR_CAP_READONLY;
+				error = VOP_OPEN(vn, FREAD, NOCRED, curproc);
+				}
 			if (error) {
 				DNPRINTF(SR_D_META,"%s: sr_meta_probe can't "
 				    "open %s\n", DEVNAME(sc), devname);
@@ -2321,6 +2325,7 @@
 	struct sr_softc		*sc = link->bus->sb_adapter_softc;
 	struct sr_workunit	*wu = xs->io;
 	struct sr_discipline	*sd;
+	unsigned char		mode_sense_header[4];
 
 	DNPRINTF(SR_D_CMD, "%s: sr_scsi_cmd target %d xs %p flags %#x\n",
 	    DEVNAME(sc), link->target, xs, xs->flags);
@@ -2395,6 +2400,19 @@
 		    DEVNAME(sc));
 		if (sd->sd_scsi_req_sense(wu))
 			goto stuffup;
+		goto complete;
+
+	case MODE_SENSE:
+		if ((xs->cmd.bytes[1] & 0x3f) != 0 && (xs->cmd.bytes[1] & 0x3f) != 0x3f) {
+			goto stuffup;
+			}
+		bzero (&mode_sense_header, 4);
+		mode_sense_header[0] = 0x03;
+		if (sd->sd_capabilities & SR_CAP_READONLY) {
+			mode_sense_header[2] = 0x80;
+			}
+		scsi_copy_internal_data(xs, &mode_sense_header, 4);
+		xs->datalen = 4;
 		goto complete;
 
 	default: