static int ext4_da_convert_inline_data_to_extent(struct address_space *mapping,
						 struct inode *inode,
						 unsigned flags,
						 void **fsdata)
{
	int ret = 0, inline_size;
	struct page *page;

	page = grab_cache_page_write_begin(mapping, 0, flags);
	if (!page)
		return -ENOMEM;

	down_read(&EXT4_I(inode)->xattr_sem);
	if (!ext4_has_inline_data(inode)) {
		ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
		goto out;
	}

	inline_size = ext4_get_inline_size(inode);

	if (!PageUptodate(page)) {
		ret = ext4_read_inline_page(inode, page);
		if (ret < 0)
			goto out;
	}

	ret = __block_write_begin(page, 0, inline_size,
				  ext4_da_get_block_prep);
	if (ret) {
		up_read(&EXT4_I(inode)->xattr_sem);
		unlock_page(page);
		put_page(page);
		ext4_truncate_failed_write(inode);
		return ret;
	}

	SetPageDirty(page);
	SetPageUptodate(page);
	ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
	*fsdata = (void *)CONVERT_INLINE_DATA;

out:
	up_read(&EXT4_I(inode)->xattr_sem);
	if (page) {
		unlock_page(page);
		put_page(page);
	}
	return ret;
}
Unknown