backend_lzo.c

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2
 3#include <linux/kernel.h>
 4#include <linux/slab.h>
 5#include <linux/lzo.h>
 6
 7#include "backend_lzo.h"
 8
 9static void lzo_release_params(struct zcomp_params *params)
10{
11}
12
13static int lzo_setup_params(struct zcomp_params *params)
14{
15	return 0;
16}
17
18static int lzo_create(struct zcomp_params *params, struct zcomp_ctx *ctx)
19{
20	ctx->context = kzalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
21	if (!ctx->context)
22		return -ENOMEM;
23	return 0;
24}
25
26static void lzo_destroy(struct zcomp_ctx *ctx)
27{
28	kfree(ctx->context);
29}
30
31static int lzo_compress(struct zcomp_params *params, struct zcomp_ctx *ctx,
32			struct zcomp_req *req)
33{
34	int ret;
35
36	ret = lzo1x_1_compress(req->src, req->src_len, req->dst,
37			       &req->dst_len, ctx->context);
38	return ret == LZO_E_OK ? 0 : ret;
39}
40
41static int lzo_decompress(struct zcomp_params *params, struct zcomp_ctx *ctx,
42			  struct zcomp_req *req)
43{
44	int ret;
45
46	ret = lzo1x_decompress_safe(req->src, req->src_len,
47				    req->dst, &req->dst_len);
48	return ret == LZO_E_OK ? 0 : ret;
49}
50
51const struct zcomp_ops backend_lzo = {
52	.compress	= lzo_compress,
53	.decompress	= lzo_decompress,
54	.create_ctx	= lzo_create,
55	.destroy_ctx	= lzo_destroy,
56	.setup_params	= lzo_setup_params,
57	.release_params	= lzo_release_params,
58	.name		= "lzo",
59};