C++ (Cpp) __remove_from_free_space_tree示例

示例#1

文件： free-space-tree.c 项目： AlexShiLucky/linux

int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
				u64 start, u64 size)
{
	struct btrfs_block_group_cache *block_group;
	struct btrfs_path *path;
	int ret;

	if (!btrfs_fs_compat_ro(trans->fs_info, FREE_SPACE_TREE))
		return 0;

	path = btrfs_alloc_path();
	if (!path) {
		ret = -ENOMEM;
		goto out;
	}

	block_group = btrfs_lookup_block_group(trans->fs_info, start);
	if (!block_group) {
		ASSERT(0);
		ret = -ENOENT;
		goto out;
	}

	mutex_lock(&block_group->free_space_lock);
	ret = __remove_from_free_space_tree(trans, block_group, path, start,
					    size);
	mutex_unlock(&block_group->free_space_lock);

	btrfs_put_block_group(block_group);
out:
	btrfs_free_path(path);
	if (ret)
		btrfs_abort_transaction(trans, ret);
	return ret;
}

示例#2

文件： free-space-tree-tests.c 项目： VedangJoshi/Content-Based-Storage-in-Btrfs

static int test_merge_none(struct btrfs_trans_handle *trans,
			   struct btrfs_fs_info *fs_info,
			   struct btrfs_block_group_cache *cache,
			   struct btrfs_path *path)
{
	struct free_space_extent extents[] = {
		{cache->key.objectid, BITMAP_RANGE},
		{cache->key.objectid + 2 * BITMAP_RANGE, BITMAP_RANGE},
		{cache->key.objectid + 4 * BITMAP_RANGE, BITMAP_RANGE},
	};
	int ret;

	ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
					    cache->key.objectid,
					    cache->key.offset);
	if (ret) {
		test_msg("Could not remove free space\n");
		return ret;
	}

	ret = __add_to_free_space_tree(trans, fs_info, cache, path,
				       cache->key.objectid, BITMAP_RANGE);
	if (ret) {
		test_msg("Could not add free space\n");
		return ret;
	}

	ret = __add_to_free_space_tree(trans, fs_info, cache, path,
				       cache->key.objectid + 4 * BITMAP_RANGE,
				       BITMAP_RANGE);
	if (ret) {
		test_msg("Could not add free space\n");
		return ret;
	}

	ret = __add_to_free_space_tree(trans, fs_info, cache, path,
				       cache->key.objectid + 2 * BITMAP_RANGE,
				       BITMAP_RANGE);
	if (ret) {
		test_msg("Could not add free space\n");
		return ret;
	}

	return check_free_space_extents(trans, fs_info, cache, path,
					extents, ARRAY_SIZE(extents));
}

示例#3

文件： free-space-tree-tests.c 项目： VedangJoshi/Content-Based-Storage-in-Btrfs

static int test_remove_all(struct btrfs_trans_handle *trans,
			   struct btrfs_fs_info *fs_info,
			   struct btrfs_block_group_cache *cache,
			   struct btrfs_path *path)
{
	struct free_space_extent extents[] = {};
	int ret;

	ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
					    cache->key.objectid,
					    cache->key.offset);
	if (ret) {
		test_msg("Could not remove free space\n");
		return ret;
	}

	return check_free_space_extents(trans, fs_info, cache, path,
					extents, ARRAY_SIZE(extents));
}