tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2014 Sergey Senozhatsky.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 */
9
10#include <linux/kernel.h>
11#include <linux/slab.h>
12#include <linux/lzo.h>
13
14#include "zcomp_lzo.h"
15
16static void *lzo_create(void)
17{
18 return kzalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
19}
20
21static void lzo_destroy(void *private)
22{
23 kfree(private);
24}
25
26static int lzo_compress(const unsigned char *src, unsigned char *dst,
27 size_t *dst_len, void *private)
28{
29 int ret = lzo1x_1_compress(src, PAGE_SIZE, dst, dst_len, private);
30 return ret == LZO_E_OK ? 0 : ret;
31}
32
33static int lzo_decompress(const unsigned char *src, size_t src_len,
34 unsigned char *dst)
35{
36 size_t dst_len = PAGE_SIZE;
37 int ret = lzo1x_decompress_safe(src, src_len, dst, &dst_len);
38 return ret == LZO_E_OK ? 0 : ret;
39}
40
41struct zcomp_backend zcomp_lzo = {
42 .compress = lzo_compress,
43 .decompress = lzo_decompress,
44 .create = lzo_create,
45 .destroy = lzo_destroy,
46 .name = "lzo",
47};