/*
   * Copyright (c) 2013
   * Phillip Lougher <phillip@squashfs.org.uk>
   *
   * This work is licensed under the terms of the GNU GPL, version 2. See
   * the COPYING file in the top-level directory.
   */
  
  #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 page *page, u64 block, int bsize)
  {
  	struct inode *i = page->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
  ", block,
  			bsize);
  	else
  		squashfs_copy_cache(page, buffer, buffer->length, 0);
  
  	squashfs_cache_put(buffer);
  	return res;
  }