Send delete message when deleting a virtual snapshot.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

---
 lib/metadata/lv_manip.c |   25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

Index: LVM2.2.02.60/lib/metadata/lv_manip.c
===================================================================
--- LVM2.2.02.60.orig/lib/metadata/lv_manip.c	2010-02-08 20:27:32.000000000 +0100
+++ LVM2.2.02.60/lib/metadata/lv_manip.c	2010-02-08 20:28:19.000000000 +0100
@@ -2070,6 +2070,7 @@ int lv_remove_single(struct cmd_context 
 	struct lvinfo info;
 	struct logical_volume *origin = NULL;
 	int was_merging = 0, preload_origin = 0;
+	const char *snapid = NULL;
 
 	vg = lv->vg;
 
@@ -2140,6 +2141,10 @@ int lv_remove_single(struct cmd_context 
 			/* FIXME Seek a simpler way of dealing with this within the tree. */
 			preload_origin = 1;
 		}
+	} else if (lv_is_multisnap_cow(lv)) {
+		struct lv_segment *seg = first_seg(lv);
+		origin = seg->origin;
+		snapid = dm_pool_strdup(cmd->mem, seg->snapid);
 	}
 
 	log_verbose("Releasing logical volume \"%s\"", lv->name);
@@ -2155,6 +2160,26 @@ int lv_remove_single(struct cmd_context 
 	if (!preload_origin && !vg_commit(vg))
 		return_0;
 
+	if (snapid) {
+		/*
+		 * Send delete message to the kernel. If origin is not active,
+		 * it will be deleted on next activation.
+		 */
+		if (lv_is_active(origin)) {
+			if (!lv_multisnap_delete(cmd, origin, snapid)) {
+				/*
+				 * Ignore error.
+				 * Allow deleting a snapshot on overflowed
+				 * snapshot store.
+				 *
+				log_error("Failed to remove snapid %s from %s.",
+					snapid, origin->name);
+				return_0;
+				 */
+			}
+		}
+	}
+
 	/* If no snapshots left or if we stopped merging, reload */
 	if (origin && (!lv_is_origin(origin) || was_merging)) {
 		if (!suspend_lv(cmd, origin)) {