xref: /linux/drivers/block/zram/backend_lzo.c (revision 52c7b4e2ba508a924c991e681db534e66a851adf)

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

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

#include "backend_lzo.h"

static void *lzo_create(struct zcomp_params *params)
{
	return kzalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
}

static void lzo_destroy(void *ctx)
{
	kfree(ctx);
}

static int lzo_compress(void *ctx, struct zcomp_req *req)
{
	int ret;

	ret = lzo1x_1_compress(req->src, req->src_len, req->dst,
			       &req->dst_len, ctx);
	return ret == LZO_E_OK ? 0 : ret;
}

static int lzo_decompress(void *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_lzo = {
	.compress	= lzo_compress,
	.decompress	= lzo_decompress,
	.create_ctx	= lzo_create,
	.destroy_ctx	= lzo_destroy,
	.name		= "lzo",
};