Exemplos de write_tree_block em C++ (Cpp)

Exemplo n.º 1

Arquivo: disk-io.c Projeto: AK47POMA/btrfs-progs

static int __commit_transaction(struct btrfs_trans_handle *trans,
				struct btrfs_root *root)
{
	u64 start;
	u64 end;
	struct extent_buffer *eb;
	struct extent_io_tree *tree = &root->fs_info->extent_cache;
	int ret;

	while(1) {
		ret = find_first_extent_bit(tree, 0, &start, &end,
					    EXTENT_DIRTY);
		if (ret)
			break;
		while(start <= end) {
			eb = find_first_extent_buffer(tree, start);
			BUG_ON(!eb || eb->start != start);
			ret = write_tree_block(trans, root, eb);
			BUG_ON(ret);
			start += eb->len;
			clear_extent_buffer_dirty(eb);
			free_extent_buffer(eb);
		}
	}
	return 0;
}

Exemplo n.º 2

static int change_header_uuid(struct btrfs_root *root, struct extent_buffer *eb)
{
	struct btrfs_fs_info *fs_info = root->fs_info;
	int same_fsid = 1;
	int same_chunk_tree_uuid = 1;
	int ret;

	same_fsid = !memcmp_extent_buffer(eb, fs_info->new_fsid,
			btrfs_header_fsid(), BTRFS_FSID_SIZE);
	same_chunk_tree_uuid =
		!memcmp_extent_buffer(eb, fs_info->new_chunk_tree_uuid,
				btrfs_header_chunk_tree_uuid(eb),
				BTRFS_UUID_SIZE);
	if (same_fsid && same_chunk_tree_uuid)
		return 0;
	if (!same_fsid)
		write_extent_buffer(eb, fs_info->new_fsid, btrfs_header_fsid(),
				    BTRFS_FSID_SIZE);
	if (!same_chunk_tree_uuid)
		write_extent_buffer(eb, fs_info->new_chunk_tree_uuid,
				    btrfs_header_chunk_tree_uuid(eb),
				    BTRFS_UUID_SIZE);
	ret = write_tree_block(NULL, root, eb);

	return ret;
}

Exemplo n.º 3

static int change_fsid_prepare(struct btrfs_fs_info *fs_info)
{
	struct btrfs_root *tree_root = fs_info->tree_root;
	u64 flags = btrfs_super_flags(fs_info->super_copy);
	int ret = 0;

	flags |= BTRFS_SUPER_FLAG_CHANGING_FSID;
	btrfs_set_super_flags(fs_info->super_copy, flags);

	memcpy(fs_info->super_copy->fsid, fs_info->new_fsid, BTRFS_FSID_SIZE);
	ret = write_all_supers(tree_root);
	if (ret < 0)
		return ret;

	/* also restore new chunk_tree_id into tree_root for restore */
	write_extent_buffer(tree_root->node, fs_info->new_chunk_tree_uuid,
			    btrfs_header_chunk_tree_uuid(tree_root->node),
			    BTRFS_UUID_SIZE);
	return write_tree_block(NULL, tree_root, tree_root->node);
}

Exemplo n.º 4

static int change_device_uuid(struct btrfs_root *root, struct extent_buffer *eb,
			      int slot)
{
	struct btrfs_fs_info *fs_info = root->fs_info;
	struct btrfs_dev_item *di;
	int ret = 0;

	di = btrfs_item_ptr(eb, slot, struct btrfs_dev_item);
	if (!memcmp_extent_buffer(eb, fs_info->new_fsid,
				  (unsigned long)btrfs_device_fsid(di),
				  BTRFS_FSID_SIZE))
		return ret;

	write_extent_buffer(eb, fs_info->new_fsid,
			    (unsigned long)btrfs_device_fsid(di),
			    BTRFS_FSID_SIZE);
	ret = write_tree_block(NULL, root, eb);

	return ret;
}