cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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file_cache.c (887B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Copyright (c) 2013
      4 * Phillip Lougher <phillip@squashfs.org.uk>
      5 */
      6
      7#include <linux/fs.h>
      8#include <linux/vfs.h>
      9#include <linux/kernel.h>
     10#include <linux/slab.h>
     11#include <linux/string.h>
     12#include <linux/pagemap.h>
     13#include <linux/mutex.h>
     14
     15#include "squashfs_fs.h"
     16#include "squashfs_fs_sb.h"
     17#include "squashfs_fs_i.h"
     18#include "squashfs.h"
     19
     20/* Read separately compressed datablock and memcopy into page cache */
     21int squashfs_readpage_block(struct page *page, u64 block, int bsize, int expected)
     22{
     23	struct inode *i = page->mapping->host;
     24	struct squashfs_cache_entry *buffer = squashfs_get_datablock(i->i_sb,
     25		block, bsize);
     26	int res = buffer->error;
     27
     28	if (res)
     29		ERROR("Unable to read page, block %llx, size %x\n", block,
     30			bsize);
     31	else
     32		squashfs_copy_cache(page, buffer, expected, 0);
     33
     34	squashfs_cache_put(buffer);
     35	return res;
     36}