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_lzorle.h" 8 9 static void *lzorle_create(struct zcomp_params *params) 10 { 11 return kzalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL); 12 } 13 14 static void lzorle_destroy(void *ctx) 15 { 16 kfree(ctx); 17 } 18 19 static int lzorle_compress(void *ctx, struct zcomp_req *req) 20 { 21 int ret; 22 23 ret = lzorle1x_1_compress(req->src, req->src_len, req->dst, 24 &req->dst_len, ctx); 25 return ret == LZO_E_OK ? 0 : ret; 26 } 27 28 static int lzorle_decompress(void *ctx, struct zcomp_req *req) 29 { 30 int ret; 31 32 ret = lzo1x_decompress_safe(req->src, req->src_len, 33 req->dst, &req->dst_len); 34 return ret == LZO_E_OK ? 0 : ret; 35 } 36 37 const struct zcomp_ops backend_lzorle = { 38 .compress = lzorle_compress, 39 .decompress = lzorle_decompress, 40 .create_ctx = lzorle_create, 41 .destroy_ctx = lzorle_destroy, 42 .name = "lzo-rle", 43 }; 44