source: src/linux/universal/linux-4.9/fs/squashfs/file_cache.c @ 31630

Last change on this file since 31630 was 31630, checked in by brainslayer, 7 weeks ago

new fs is compatible with standard squashfs, just smaller

File size: 961 bytes
Line 
1/*
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 */
23int squashfs_readpage_block(struct page *page, u64 block, int bsize)
24{
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
34                squashfs_copy_cache(page, buffer, buffer->length, 0);
35
36        squashfs_cache_put(buffer);
37        return res;
38}
Note: See TracBrowser for help on using the repository browser.