Use m and M lv_attr to indicate that a snapshot merge failed in lvs.

snapshot (m)erge failed, suspended snapshot (M)erge failed

WHATS_NEW

@@ -1,5 +1,6 @@
 Version 2.02.89 - 
 ==================================
+  Use m and M lv_attr to indicate that a snapshot merge failed in lvs.
   Differentiate between snapshot status of "Invalid" and "Merge failed".
   Lookup snapshot usage percent of origin volume when a snapshot is merging.
   Update lvdisplay with backward compat. config opt. lvm1_compatible_display.

lib/metadata/lv.c

@@ -441,14 +441,21 @@ char *lv_attr_dup(struct dm_pool *mem, const struct logical_volume *lv)
 			repstr[4] = 'd';	/* Inactive without table */
 
 		/* Snapshot dropped? */
-		if (info.live_table && lv_is_cow(lv) &&
-		    (!lv_snapshot_percent(lv, &snap_percent) ||
-		     snap_percent == PERCENT_INVALID)) {
-			repstr[0] = toupper(repstr[0]);
-			if (info.suspended)
-				repstr[4] = 'S'; /* Susp Inv snapshot */
-			else
-				repstr[4] = 'I'; /* Invalid snapshot */
+		if (info.live_table && lv_is_cow(lv)) {
+			if (!lv_snapshot_percent(lv, &snap_percent) ||
+			    snap_percent == PERCENT_INVALID) {
+				repstr[0] = toupper(repstr[0]);
+				if (info.suspended)
+					repstr[4] = 'S'; /* Susp Inv snapshot */
+				else
+					repstr[4] = 'I'; /* Invalid snapshot */
+			}
+			else if (snap_percent == PERCENT_MERGE_FAILED) {
+				if (info.suspended)
+					repstr[4] = 'M'; /* Susp snapshot merge failed */
+				else
+					repstr[4] = 'm'; /* snapshot merge failed */
+			}
 		}
 
 		/*

man/lvs.8.in

@@ -105,6 +105,7 @@ changes, for example during
 fixed (m)inor
 .IP 5 3
 State: (a)ctive, (s)uspended, (I)nvalid snapshot, invalid (S)uspended snapshot,
+snapshot (m)erge failed, suspended snapshot (M)erge failed,
 mapped (d)evice present without tables, mapped device present with (i)nactive table
 .IP 6 3
 device (o)pen