From e11bf3ee668eadb08e7dfd3a71a37f6d04a7e811 Mon Sep 17 00:00:00 2001
From: bde <bde@FreeBSD.org>
Date: Sat, 4 Mar 1995 11:08:26 +0000
Subject: [PATCH] Fake the geometry to be 32 sectors * 64 heads * (vn->sc_size
 / 2048) cylinders instead of vn->sc_size * 1 * 1.

Remove unnecessary tests of the unit numbern vnioctl().
---
 sys/dev/vn/vn.c | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/sys/dev/vn/vn.c b/sys/dev/vn/vn.c
index 2e74cc679634..3e075acf665b 100644
--- a/sys/dev/vn/vn.c
+++ b/sys/dev/vn/vn.c
@@ -64,7 +64,7 @@
 /* default is to have 8 VN's */
 #if NVN < 8
 #undef NVN
-#define NVN 8
+#define	NVN	8
 #endif
 
 #include <sys/param.h>
@@ -186,12 +186,12 @@ vnopen(dev_t dev, int flags, int mode, struct proc *p)
 		/* Build label for whole disk. */
 		bzero(&label, sizeof label);
 		label.d_secsize = DEV_BSIZE;
-		label.d_nsectors = vn->sc_size;
-		label.d_ntracks = 1;
-		label.d_ncylinders = 1;
-		label.d_secpercyl = label.d_nsectors;
+		label.d_nsectors = 32;
+		label.d_ntracks = 64;
+		label.d_ncylinders = vn->sc_size / (32 * 64);
+		label.d_secpercyl = 32 * 64;
 		label.d_secperunit = label.d_partitions[RAW_PART].p_size
-				   = label.d_nsectors;
+				   = vn->sc_size;
 
 		return (dsopen("vn", dev, mode, &vn->sc_slices, &label,
 			       vnstrategy, (ds_setgeom_t *)NULL));
@@ -421,11 +421,6 @@ vnioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
 #endif
 
 #ifdef TEST_LABELLING
-	/*
-	 * XXX test is unnecessary?
-	 */
-	if (unit >= NVN)
-		return (ENXIO);
 	vn = vn_softc[unit];
 	if (vn->sc_slices != NULL) {
 		error = dsioctl(dev, cmd, data, flag, vn->sc_slices,
@@ -440,8 +435,6 @@ vnioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
 	error = suser(p->p_ucred, &p->p_acflag);
 	if (error)
 		return (error);
-	if (unit >= NVN)
-		return (ENXIO);
 
 	vn = vn_softc[unit];
 	vio = (struct vn_ioctl *)data;