Btrfs-progs: remove some dead/unbuilt code

Remove some commented-out & #if 0'd code:

 * close_blocks()
 * btrfs_drop_snapshot()
 * btrfs_realloc_node()
 * btrfs_find_dead_roots()

There are still some #if 0'd functions in there, but I'm hedging
on those for now, they have been copied to cmds-check.c and I want
to see if they can be brough back into ctree.c eventually.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

1 files changed, 0 insertions, 71 deletions

diff --git a/extent-tree.c b/extent-tree.c
index f597e16..63b1a38 100644
--- a/extent-tree.c
+++ b/extent-tree.c
@@ -3091,77 +3091,6 @@ static int noinline walk_up_tree(struct btrfs_trans_handle *trans,
 	return 1;
 }
 
-/*
- * drop the reference count on the tree rooted at 'snap'.  This traverses
- * the tree freeing any blocks that have a ref count of zero after being
- * decremented.
- */
-int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
-			*root)
-{
-	int ret = 0;
-	int wret;
-	int level;
-	struct btrfs_path *path;
-	int i;
-	int orig_level;
-	struct btrfs_root_item *root_item = &root->root_item;
-
-	path = btrfs_alloc_path();
-	BUG_ON(!path);
-
-	level = btrfs_header_level(root->node);
-	orig_level = level;
-	if (btrfs_disk_key_objectid(&root_item->drop_progress) == 0) {
-		path->nodes[level] = root->node;
-		extent_buffer_get(root->node);
-		path->slots[level] = 0;
-	} else {
-		struct btrfs_key key;
-		struct btrfs_disk_key found_key;
-		struct extent_buffer *node;
-
-		btrfs_disk_key_to_cpu(&key, &root_item->drop_progress);
-		level = root_item->drop_level;
-		path->lowest_level = level;
-		wret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
-		if (wret < 0) {
-			ret = wret;
-			goto out;
-		}
-		node = path->nodes[level];
-		btrfs_node_key(node, &found_key, path->slots[level]);
-		WARN_ON(memcmp(&found_key, &root_item->drop_progress,
-			       sizeof(found_key)));
-	}
-	while(1) {
-		wret = walk_down_tree(trans, root, path, &level);
-		if (wret < 0)
-			ret = wret;
-		if (wret != 0)
-			break;
-
-		wret = walk_up_tree(trans, root, path, &level);
-		if (wret < 0)
-			ret = wret;
-		if (wret != 0)
-			break;
-		/*
-		ret = -EAGAIN;
-		break;
-		*/
-	}
-	for (i = 0; i <= orig_level; i++) {
-		if (path->nodes[i]) {
-			free_extent_buffer(path->nodes[i]);
-			path->nodes[i] = NULL;
-		}
-	}
-out:
-	btrfs_free_path(path);
-	return ret;
-}
-
 #endif
 
 int btrfs_free_block_groups(struct btrfs_fs_info *info)