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
lzo_release_params(struct zcomp_params * params)9 static void lzo_release_params(struct zcomp_params *params)
10 {
11 }
12
lzo_setup_params(struct zcomp_params * params)13 static int lzo_setup_params(struct zcomp_params *params)
14 {
15 return 0;
16 }
17
lzo_create(struct zcomp_params * params,struct zcomp_ctx * ctx)18 static 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
lzo_destroy(struct zcomp_ctx * ctx)26 static void lzo_destroy(struct zcomp_ctx *ctx)
27 {
28 kfree(ctx->context);
29 }
30
lzo_compress(struct zcomp_params * params,struct zcomp_ctx * ctx,struct zcomp_req * req)31 static 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
lzo_decompress(struct zcomp_params * params,struct zcomp_ctx * ctx,struct zcomp_req * req)41 static 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
51 const 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 };
60