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From: "Andrey V. Elsukov" <ae@FreeBSD.org>
Date: Thu, 15 Sep 2011 04:35:00 +0000 (UTC)
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Subject: svn commit: r225566 - stable/8/sbin/geom/class/part
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Author: ae
Date: Thu Sep 15 04:34:59 2011
New Revision: 225566
URL: http://svn.freebsd.org/changeset/base/225566

Log:
  MFC r223356 (by delphij):
    Mod the offset padding by alignment.  Without this change we may
    pad too much when underlying GEOM object have a zero stripesize.

Modified:
  stable/8/sbin/geom/class/part/geom_part.c
Directory Properties:
  stable/8/sbin/geom/class/part/   (props changed)

Modified: stable/8/sbin/geom/class/part/geom_part.c
==============================================================================
--- stable/8/sbin/geom/class/part/geom_part.c	Thu Sep 15 04:32:14 2011	(r225565)
+++ stable/8/sbin/geom/class/part/geom_part.c	Thu Sep 15 04:34:59 2011	(r225566)
@@ -366,7 +366,7 @@ 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");
@@ -514,7 +514,7 @@ 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);