[lvm-devel] [PATCH 4/7] Add vg_set_max_lv() liblvm function and move vgchange logic inside.

[Dave Wysochanski]

Add vg_set_max_lv() liblvm function and move vgchange logic inside.

Signed-off-by: Dave Wysochanski <dwysocha at redhat.com>
---
 lib/metadata/metadata-exported.h |    1 +
 lib/metadata/metadata.c          |   28 ++++++++++++++++++++++++++++
 tools/vgchange.c                 |   25 ++-----------------------
 3 files changed, 31 insertions(+), 23 deletions(-)

diff --git a/lib/metadata/metadata-exported.h b/lib/metadata/metadata-exported.h
index 70c24dd..b817f5f 100644
--- a/lib/metadata/metadata-exported.h
+++ b/lib/metadata/metadata-exported.h
@@ -441,6 +441,7 @@ int vg_rename(struct cmd_context *cmd, struct volume_group *vg,
 	      const char *new_name);
 int vg_extend(struct volume_group *vg, int pv_count, char **pv_names);
 int vg_set_extent_size(vg_t *vg, uint32_t new_extent_size);
+int vg_set_max_lv(vg_t *vg, uint32_t max_lv);
 int vg_split_mdas(struct cmd_context *cmd, struct volume_group *vg_from,
 		  struct volume_group *vg_to);
 
diff --git a/lib/metadata/metadata.c b/lib/metadata/metadata.c
index 2237f83..ab9a72b 100644
--- a/lib/metadata/metadata.c
+++ b/lib/metadata/metadata.c
@@ -774,6 +774,34 @@ int vg_set_extent_size(vg_t *vg, uint32_t new_size)
 	return 1;
 }
 
+int vg_set_max_lv(vg_t *vg, uint32_t max_lv)
+{
+	if (!(vg_status(vg) & RESIZEABLE_VG)) {
+		log_error("Volume group \"%s\" must be resizeable "
+			  "to change MaxLogicalVolume", vg->name);
+		return 0;
+	}
+
+	if (!(vg->fid->fmt->features & FMT_UNLIMITED_VOLS)) {
+		if (!max_lv)
+			max_lv = 255;
+		else if (max_lv > 255) {
+			log_error("MaxLogicalVolume limit is 255");
+			return 0;
+		}
+	}
+
+	if (max_lv && max_lv < vg_visible_lvs(vg)) {
+		log_error("MaxLogicalVolume is less than the current number "
+			  "%d of LVs for %s", vg_visible_lvs(vg),
+			  vg->name);
+		return 0;
+	}
+	vg->max_lv = max_lv;
+
+	return 1;
+}
+
 /*
  * Separate metadata areas after splitting a VG.
  * Also accepts orphan VG as destination (for vgreduce).
diff --git a/tools/vgchange.c b/tools/vgchange.c
index a2b8aa9..6bb837e 100644
--- a/tools/vgchange.c
+++ b/tools/vgchange.c
@@ -293,32 +293,11 @@ static int _vgchange_logicalvolume(struct cmd_context *cmd,
 {
 	uint32_t max_lv = arg_uint_value(cmd, logicalvolume_ARG, 0);
 
-	if (!(vg_status(vg) & RESIZEABLE_VG)) {
-		log_error("Volume group \"%s\" must be resizeable "
-			  "to change MaxLogicalVolume", vg->name);
-		return ECMD_FAILED;
-	}
-
-	if (!(vg->fid->fmt->features & FMT_UNLIMITED_VOLS)) {
-		if (!max_lv)
-			max_lv = 255;
-		else if (max_lv > 255) {
-			log_error("MaxLogicalVolume limit is 255");
-			return ECMD_FAILED;
-		}
-	}
-
-	if (max_lv && max_lv < vg_visible_lvs(vg)) {
-		log_error("MaxLogicalVolume is less than the current number "
-			  "%d of LVs for %s", vg_visible_lvs(vg),
-			  vg->name);
-		return ECMD_FAILED;
-	}
-
 	if (!archive(vg))
 		return ECMD_FAILED;
 
-	vg->max_lv = max_lv;
+	if (!vg_set_max_lv(vg, max_lv))
+		return ECMD_FAILED;
 
 	if (!vg_write(vg) || !vg_commit(vg))
 		return ECMD_FAILED;
-- 
1.6.0.6