// SPDX-License-Identifier: GPL-2.0-or-later

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/lzo.h>

#include "backend_lzorle.h"

static void lzorle_release_params(struct zcomp_params *params)
{
}

static int lzorle_setup_params(struct zcomp_params *params)
{
        return 0;
}

static int lzorle_create(struct zcomp_params *params, struct zcomp_ctx *ctx)
{
        ctx->context = kzalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
        if (!ctx->context)
                return -ENOMEM;
        return 0;
}

static void lzorle_destroy(struct zcomp_ctx *ctx)
{
        kfree(ctx->context);
}

static int lzorle_compress(struct zcomp_params *params, struct zcomp_ctx *ctx,
                           struct zcomp_req *req)
{
        int ret;

        ret = lzorle1x_1_compress(req->src, req->src_len, req->dst,
                                  &req->dst_len, ctx->context);
        return ret == LZO_E_OK ? 0 : ret;
}

static int lzorle_decompress(struct zcomp_params *params, struct zcomp_ctx *ctx,
                             struct zcomp_req *req)
{
        int ret;

        ret = lzo1x_decompress_safe(req->src, req->src_len,
                                    req->dst, &req->dst_len);
        return ret == LZO_E_OK ? 0 : ret;
}

const struct zcomp_ops backend_lzorle = {
        .compress       = lzorle_compress,
        .decompress     = lzorle_decompress,
        .create_ctx     = lzorle_create,
        .destroy_ctx    = lzorle_destroy,
        .setup_params   = lzorle_setup_params,
        .release_params = lzorle_release_params,
        .name           = "lzo-rle",
};