// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2013
 * Phillip Lougher <phillip@squashfs.org.uk>
 */

#include <linux/fs.h>
#include <linux/vfs.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/pagemap.h>
#include <linux/mutex.h>

#include "squashfs_fs.h"
#include "squashfs_fs_sb.h"
#include "squashfs_fs_i.h"
#include "squashfs.h"

/* Read separately compressed datablock and memcopy into page cache */
int squashfs_readpage_block(struct folio *folio, u64 block, int bsize, int expected)
{
        struct inode *i = folio->mapping->host;
        struct squashfs_cache_entry *buffer = squashfs_get_datablock(i->i_sb,
                block, bsize);
        int res = buffer->error;

        if (res)
                ERROR("Unable to read page, block %llx, size %x\n", block,
                        bsize);
        else
                squashfs_copy_cache(folio, buffer, expected, 0);

        squashfs_cache_put(buffer);
        return res;
}