Implement the DIOCKLABEL ioctl. Through this ioctl it it possible keep the

disklabel on the last close or to drop it.

share/man/man4/sd.4

@@ -1,4 +1,4 @@
-.\"	$NetBSD: sd.4,v 1.8 1999/03/16 01:19:18 garbled Exp $
+.\"	$NetBSD: sd.4,v 1.9 1999/12/23 21:24:03 leo Exp $
 .\"
 .\" Copyright (c) 1996
 .\"     Julian Elischer <julian@freebsd.org>.  All rights reserved.
@@ -175,6 +175,8 @@ The driver
 .Em will not
 write the new
 disklabel to the disk.
+.It Dv DIOCKLABEL
+Keep or drop the in-core disklabel on the last close.
 .It Dv DIOCWLABEL
 Enable or disable the driver's software
 write protect of the disklabel on the disk.

sys/dev/ata/wd.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: wd.c,v 1.198 1999/11/10 14:11:34 leo Exp $ */
+/*	$NetBSD: wd.c,v 1.199 1999/12/23 21:23:19 leo Exp $ */
 
 /*
  * Copyright (c) 1998 Manuel Bouyer.  All rights reserved.
@@ -153,6 +153,7 @@ struct wd_softc {
 #define WDF_LOADED	  0x10 /* parameters loaded */
 #define WDF_WAIT	0x20 /* waiting for resources */
 #define WDF_LBA	 0x40 /* using LBA mode */
+#define WDF_KLABEL	 0x80 /* retain label after 'full' close */
 	int sc_capacity;
 	int cyl; /* actual drive parameters */
 	int heads;
@@ -816,6 +817,9 @@ wdclose(dev, flag, fmt, p)
 		wd_flushcache(wd, AT_WAIT);
 		/* XXXX Must wait for I/O to complete! */
 
+		if (! (wd->sc_flags & WDF_KLABEL))
+			wd->sc_flags &= ~WDF_LOADED;
+
 		wdc_ata_delref(wd->drvp);
 	}
 
@@ -970,6 +974,13 @@ wdioctl(dev, xfer, addr, flag, p)
 		wdunlock(wd);
 		return error;
 
+	case DIOCKLABEL:
+		if (*(int *)addr)
+			wd->sc_flags |= WDF_KLABEL;
+		else
+			wd->sc_flags &= ~WDF_KLABEL;
+		return 0;
+	
 	case DIOCWLABEL:
 		if ((flag & FWRITE) == 0)
 			return EBADF;

sys/dev/scsipi/scsipiconf.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: scsipiconf.h,v 1.33 1999/10/20 15:22:28 enami Exp $	*/
+/*	$NetBSD: scsipiconf.h,v 1.34 1999/12/23 21:23:29 leo Exp $	*/
 
 /*-
  * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
@@ -180,6 +180,7 @@ struct scsipi_link {
 #define	SDEV_OPEN	 	0x08	/* at least 1 open session */
 #define	SDEV_DBX		0xf0	/* debuging flags (scsipi_debug.h) */
 #define	SDEV_WAITDRAIN		0x100	/* waiting for pending_xfers to drain */
+#define	SDEV_KEEP_LABEL		0x200	/* retain label after 'full' close */
 	u_int16_t quirks;		/* per-device oddities */
 #define	SDEV_AUTOSAVE		0x0001	/*
 					 * Do implicit SAVEDATAPOINTER on

sys/dev/scsipi/sd.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: sd.c,v 1.153 1999/11/03 20:50:17 matt Exp $	*/
+/*	$NetBSD: sd.c,v 1.154 1999/12/23 21:23:30 leo Exp $	*/
 
 /*-
  * Copyright (c) 1998 The NetBSD Foundation, Inc.
@@ -530,6 +530,9 @@ sdclose(dev, flag, fmt, p)
 		    XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY);
 		sd->sc_link->flags &= ~SDEV_OPEN;
 
+		if (! (sd->sc_link->flags & SDEV_KEEP_LABEL))
+			sd->sc_link->flags &= ~SDEV_MEDIA_LOADED;
+
 		scsipi_wait_drain(sd->sc_link);
 
 		scsipi_adapter_delref(sd->sc_link);
@@ -852,6 +855,7 @@ sdioctl(dev, cmd, addr, flag, p)
 	 */
 	if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) {
 		switch (cmd) {
+		case DIOCKLABEL:
 		case DIOCWLABEL:
 		case DIOCLOCK:
 		case DIOCEJECT:
@@ -905,6 +909,13 @@ sdioctl(dev, cmd, addr, flag, p)
 		sdunlock(sd);
 		return (error);
 
+	case DIOCKLABEL:
+		if (*(int *)addr)
+			sd->sc_link->flags |= SDEV_KEEP_LABEL;
+		else
+			sd->sc_link->flags &= ~SDEV_KEEP_LABEL;
+		return (0);
+
 	case DIOCWLABEL:
 		if ((flag & FWRITE) == 0)
 			return (EBADF);

sys/sys/dkio.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: dkio.h,v 1.3 1999/02/08 16:33:18 bouyer Exp $	*/
+/*	$NetBSD: dkio.h,v 1.4 1999/12/23 21:23:31 leo Exp $	*/
 
 /*
  * Copyright (c) 1987, 1988, 1993
@@ -53,6 +53,7 @@
 
 #define DIOCSSTEP	_IOW('d', 107, int)	/* set step rate */
 #define DIOCSRETRIES	_IOW('d', 108, int)	/* set # of retries */
+#define DIOCKLABEL	_IOW('d', 119, int)	/* keep/drop label on close? */
 #define DIOCWLABEL	_IOW('d', 109, int)	/* write en/disable label */
 
 #define DIOCSBAD	_IOW('d', 110, struct dkbad)	/* set kernel dkbad */