blob: a9ba8d96776ac2661a98370612d02b53784577c7 [file] [log] [blame]
Phillip Lougher5f55dbc2013-10-31 19:24:27 +00001/*
2 * Copyright (c) 2013
3 * Phillip Lougher <phillip@squashfs.org.uk>
4 *
5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
7 */
8
9#include <linux/fs.h>
10#include <linux/vfs.h>
11#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/string.h>
14#include <linux/pagemap.h>
15#include <linux/mutex.h>
16
17#include "squashfs_fs.h"
18#include "squashfs_fs_sb.h"
19#include "squashfs_fs_i.h"
20#include "squashfs.h"
21
22/* Read separately compressed datablock and memcopy into page cache */
Phillip Lougher6b9882c2018-08-02 16:45:15 +010023int squashfs_readpage_block(struct page *page, u64 block, int bsize, int expected)
Phillip Lougher5f55dbc2013-10-31 19:24:27 +000024{
25 struct inode *i = page->mapping->host;
26 struct squashfs_cache_entry *buffer = squashfs_get_datablock(i->i_sb,
27 block, bsize);
28 int res = buffer->error;
29
30 if (res)
31 ERROR("Unable to read page, block %llx, size %x\n", block,
32 bsize);
33 else
Phillip Lougher6b9882c2018-08-02 16:45:15 +010034 squashfs_copy_cache(page, buffer, expected, 0);
Phillip Lougher5f55dbc2013-10-31 19:24:27 +000035
36 squashfs_cache_put(buffer);
37 return res;
38}