[PATCH] Add RAID identification characters to lv_attr field

[PATCH] Add RAID identification characters to lv_attr field

[Jonathan Brassow]

Add characters to indicate LV type for RAID and RAID_IMAGE.  (RAID_META is already handled.)

Index: LVM2/lib/metadata/lv.c
===================================================================
--- LVM2.orig/lib/metadata/lv.c
+++ LVM2/lib/metadata/lv.c
@@ -304,6 +304,48 @@ static int _lv_mimage_in_sync(const stru
 	return (percent == PERCENT_100) ? 1 : 0;
 }
 
+static int _lv_raid_image_in_sync(const struct logical_volume *lv)
+{
+	percent_t percent;
+	struct lv_segment *raid_seg;
+
+	if (!(lv->status & RAID_IMAGE)) {
+		log_error(INTERNAL_ERROR "%s is not a RAID image", lv->name);
+		return 0;
+	}
+
+	raid_seg = get_only_segment_using_this_lv(first_seg(lv)->lv);
+	if (!raid_seg) {
+		log_error("Failed to find RAID segment for %s", lv->name);
+		return 0;
+	}
+
+	if (!seg_is_raid(raid_seg)) {
+		log_error("%s on %s is not a RAID segment",
+			  raid_seg->lv->name, lv->name);
+		return 0;
+	}
+
+	if (!lv_raid_percent(raid_seg->lv, &percent))
+		return_0;
+
+	if (percent == PERCENT_100)
+		return 1;
+
+	/*
+	 * FIXME:  Get individual RAID image status.
+	 * The status health characters reported from a RAID target
+	 * indicate whether the whole array or just individual devices
+	 * are in-sync.  If the corresponding character for this image
+	 * was 'A', we could report a more accurate status.  This is
+	 * especially so in the case of failures or rebuildings.
+	 *
+	 * We need to test the health characters anyway to report
+	 * the correct 4th attr character.  Just need to figure out
+	 * where to put this functionality.
+	 */
+	return 0;
+}
 char *lv_attr_dup(struct dm_pool *mem, const struct logical_volume *lv)
 {
 	percent_t snap_percent;
@@ -327,6 +369,8 @@ char *lv_attr_dup(struct dm_pool *mem, c
 	/* Origin takes precedence over mirror and thin volume */
 	else if (lv_is_origin(lv))
 		repstr[0] = (lv_is_merging_origin(lv)) ? 'O' : 'o';
+	else if (lv->status & RAID)
+		repstr[0] = (lv->status & LV_NOTSYNCED) ? 'R' : 'r';
 	else if (lv->status & MIRRORED)
 		repstr[0] = (lv->status & LV_NOTSYNCED) ? 'M' : 'm';
 	else if (lv_is_thin_volume(lv))
@@ -341,6 +385,8 @@ char *lv_attr_dup(struct dm_pool *mem, c
 		repstr[0] = 'e';
 	else if (lv->status & MIRROR_IMAGE)
 		repstr[0] = (_lv_mimage_in_sync(lv)) ? 'i' : 'I';
+	else if (lv->status & RAID_IMAGE)
+		repstr[0] = (_lv_raid_image_in_sync(lv)) ? 'i' : 'I';
 	else if (lv->status & MIRROR_LOG)
 		repstr[0] = 'l';
 	else if (lv_is_cow(lv)) {