MFC: Don't allow to specify wrong stripe size.

Index: sbin/geom/class/stripe/geom_stripe.c
===================================================================
RCS file: /private/FreeBSD/src/sbin/geom/class/stripe/geom_stripe.c,v
retrieving revision 1.6.2.1
retrieving revision 1.8
diff -u -p -r1.6.2.1 -r1.8
--- sbin/geom/class/stripe/geom_stripe.c	14 Sep 2004 15:42:23 -0000	1.6.2.1
+++ sbin/geom/class/stripe/geom_stripe.c	26 Sep 2004 17:15:42 -0000	1.8
@@ -25,7 +25,7 @@
  */
 
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/sbin/geom/class/stripe/geom_stripe.c,v 1.6.2.1 2004/09/14 15:42:23 pjd Exp $");
+__FBSDID("$FreeBSD: src/sbin/geom/class/stripe/geom_stripe.c,v 1.8 2004/09/26 17:15:42 pjd Exp $");
 
 #include <sys/param.h>
 #include <errno.h>
@@ -129,7 +129,7 @@ stripe_label(struct gctl_req *req)
 	intmax_t *stripesizep;
 	off_t compsize, msize;
 	u_char sector[512];
-	unsigned i, ssize;
+	unsigned i, ssize, secsize;
 	const char *name;
 	char param[16];
 	int *hardcode, *nargs, error;
@@ -153,6 +153,7 @@ stripe_label(struct gctl_req *req)
 	 * Clear last sector first to spoil all components if device exists.
 	 */
 	compsize = 0;
+	secsize = 0;
 	for (i = 1; i < (unsigned)*nargs; i++) {
 		snprintf(param, sizeof(param), "arg%u", i);
 		name = gctl_get_asciiparam(req, param);
@@ -167,6 +168,10 @@ stripe_label(struct gctl_req *req)
 		msize -= ssize;
 		if (compsize == 0 || (compsize > 0 && msize < compsize))
 			compsize = msize;
+		if (secsize == 0)
+			secsize = ssize;
+		else
+			secsize = g_lcm(secsize, ssize);
 
 		error = g_metadata_clear(name, NULL);
 		if (error != 0) {
@@ -191,6 +196,11 @@ stripe_label(struct gctl_req *req)
 		gctl_error(req, "No '%s' argument.", "stripesize");
 		return;
 	}
+	if ((*stripesizep % secsize) != 0) {
+		gctl_error(req, "Stripesize should be multiple of %u.",
+		    secsize);
+		return;
+	}
 	md.md_stripesize = *stripesizep;
 
 	/*