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From: Xin LI <delphij@FreeBSD.org>
Date: Tue, 21 Jun 2011 04:46:00 +0000 (UTC)
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Subject: svn commit: r223356 - head/sbin/geom/class/part
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Author: delphij
Date: Tue Jun 21 04:46:00 2011
New Revision: 223356
URL: http://svn.freebsd.org/changeset/base/223356

Log:
  Mod the offset padding by alignment.  Without this change we may
  pad too much when underlying GEOM object have a zero stripesize.
  
  MFC after:	1 month

Modified:
  head/sbin/geom/class/part/geom_part.c

Modified: head/sbin/geom/class/part/geom_part.c
==============================================================================
--- head/sbin/geom/class/part/geom_part.c	Tue Jun 21 04:06:39 2011	(r223355)
+++ head/sbin/geom/class/part/geom_part.c	Tue Jun 21 04:46:00 2011	(r223356)
@@ -362,7 +362,7 @@ gpart_autofill_resize(struct gctl_req *r
 			goto done;
 	}
 
-	offset = pp->lg_stripeoffset / pp->lg_sectorsize;
+	offset = (pp->lg_stripeoffset / pp->lg_sectorsize) % alignment;
 	last = (off_t)strtoimax(find_geomcfg(gp, "last"), NULL, 0);
 	LIST_FOREACH(pp, &gp->lg_provider, lg_provider) {
 		s = find_provcfg(pp, "index");
@@ -497,7 +497,7 @@ gpart_autofill(struct gctl_req *req)
 		alignment = len;
 
 	/* Adjust parameters to stripeoffset */
-	offset = pp->lg_stripeoffset / pp->lg_sectorsize;
+	offset = (pp->lg_stripeoffset / pp->lg_sectorsize) % alignment;
 	start = ALIGNUP(start + offset, alignment);
 	if (size > alignment)
 		size = ALIGNDOWN(size, alignment);