btrfs: simplify

src/lxc/bdev/bdev.c

@@ -441,11 +441,6 @@ struct bdev *bdev_copy(struct lxc_container *c0, const char *cname,
 			goto err;
 		}
 
-		if (mkdir_p(new->dest, 0755) < 0) {
-			ERROR("Failed to create directory \"%s\"", new->dest);
-			goto err;
-		}
-
 		arg.src = orig->dest;
 		arg.dest = new->dest;
 		if (am_unpriv())

src/lxc/bdev/lxcbtrfs.c

@@ -413,8 +413,19 @@ int btrfs_clonepaths(struct bdev *orig, struct bdev *new, const char *oldname,
 
 	if (snap) {
 		struct rsync_data_char sdata;
-		if (!am_unpriv())
-			return btrfs_snapshot(orig->dest, new->dest);
+		if (!am_unpriv()) {
+			ret = btrfs_snapshot(orig->dest, new->dest);
+			if (ret < 0) {
+				SYSERROR("Failed to create btrfs snapshot "
+					 "\"%s\" from \"%s\"",
+					 new->dest, orig->dest);
+				return -1;
+			}
+			TRACE("Created btrfs snapshot \"%s\" from \"%s\"",
+			      new->dest, orig->dest);
+			return 0;
+		}
+
 		sdata.dest = new->dest;
 		sdata.src = orig->dest;
 		return userns_exec_1(conf, btrfs_snapshot_wrapper, &sdata,
@@ -430,6 +441,8 @@ int btrfs_clonepaths(struct bdev *orig, struct bdev *new, const char *oldname,
 	ret = btrfs_subvolume_create(new->dest);
 	if (ret < 0)
 		SYSERROR("Failed to create btrfs subvolume \"%s\"", new->dest);
+	else
+		TRACE("Created btrfs subvolume \"%s\"", new->dest);
 	return ret;
 }