MFC r256724:

Make geom_label(4) resize-aware.  This fixes a situation when "gpart resize"
would resize a partition, but label providers - e.g. /dev/gptid/XXX - would
stay the same size.

MFC r256766:

Fix build with gcc by spelling unused format string as "unused" instead of NULL.

Sponsored by:	The FreeBSD Foundation

2 files changed, 13 insertions, 1 deletions

diff --git a/sys/geom/geom_slice.c b/sys/geom/geom_slice.c
index 0f12a0a..976d840 100644
--- a/sys/geom/geom_slice.c
+++ b/sys/geom/geom_slice.c
@@ -382,7 +382,7 @@ g_slice_config(struct g_geom *gp, u_int idx, int how, off_t offset, off_t length
 			printf("GEOM: Reconfigure %s, start %jd length %jd end %jd\n",
 			    pp->name, (intmax_t)offset, (intmax_t)length,
 			    (intmax_t)(offset + length - 1));
-		pp->mediasize = gsl->length;
+		g_resize_provider(pp, gsl->length);
 		return (0);
 	}
 	sb = sbuf_new_auto();
diff --git a/sys/geom/label/g_label.c b/sys/geom/label/g_label.c
index 2011b77..fc16f7f 100644
--- a/sys/geom/label/g_label.c
+++ b/sys/geom/label/g_label.c
@@ -124,6 +124,17 @@ g_label_spoiled(struct g_consumer *cp)
 	g_slice_spoiled(cp);
 }
 
+static void
+g_label_resize(struct g_consumer *cp)
+{
+
+	G_LABEL_DEBUG(1, "Label %s resized.",
+	    LIST_FIRST(&cp->geom->provider)->name);
+
+	g_slice_config(cp->geom, 0, G_SLICE_CONFIG_FORCE, (off_t)0,
+	    cp->provider->mediasize, cp->provider->sectorsize, "notused");
+}
+
 static int
 g_label_is_name_ok(const char *label)
 {
@@ -208,6 +219,7 @@ g_label_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp,
 	}
 	gp->orphan = g_label_orphan;
 	gp->spoiled = g_label_spoiled;
+	gp->resize = g_label_resize;
 	g_access(cp, -1, 0, 0);
 	g_slice_config(gp, 0, G_SLICE_CONFIG_SET, (off_t)0, mediasize,
 	    pp->sectorsize, "%s", name);