cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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zstd_decompress_module.c (2715B)

      1// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
      2/*
      3 * Copyright (c) Facebook, Inc.
      4 * All rights reserved.
      5 *
      6 * This source code is licensed under both the BSD-style license (found in the
      7 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
      8 * in the COPYING file in the root directory of this source tree).
      9 * You may select, at your option, one of the above-listed licenses.
     10 */
     11
     12#include <linux/kernel.h>
     13#include <linux/module.h>
     14#include <linux/string.h>
     15#include <linux/zstd.h>
     16
     17#include "common/zstd_deps.h"
     18
     19/* Common symbols. zstd_compress must depend on zstd_decompress. */
     20
     21unsigned int zstd_is_error(size_t code)
     22{
     23	return ZSTD_isError(code);
     24}
     25EXPORT_SYMBOL(zstd_is_error);
     26
     27zstd_error_code zstd_get_error_code(size_t code)
     28{
     29	return ZSTD_getErrorCode(code);
     30}
     31EXPORT_SYMBOL(zstd_get_error_code);
     32
     33const char *zstd_get_error_name(size_t code)
     34{
     35	return ZSTD_getErrorName(code);
     36}
     37EXPORT_SYMBOL(zstd_get_error_name);
     38
     39/* Decompression symbols. */
     40
     41size_t zstd_dctx_workspace_bound(void)
     42{
     43	return ZSTD_estimateDCtxSize();
     44}
     45EXPORT_SYMBOL(zstd_dctx_workspace_bound);
     46
     47zstd_dctx *zstd_init_dctx(void *workspace, size_t workspace_size)
     48{
     49	if (workspace == NULL)
     50		return NULL;
     51	return ZSTD_initStaticDCtx(workspace, workspace_size);
     52}
     53EXPORT_SYMBOL(zstd_init_dctx);
     54
     55size_t zstd_decompress_dctx(zstd_dctx *dctx, void *dst, size_t dst_capacity,
     56	const void *src, size_t src_size)
     57{
     58	return ZSTD_decompressDCtx(dctx, dst, dst_capacity, src, src_size);
     59}
     60EXPORT_SYMBOL(zstd_decompress_dctx);
     61
     62size_t zstd_dstream_workspace_bound(size_t max_window_size)
     63{
     64	return ZSTD_estimateDStreamSize(max_window_size);
     65}
     66EXPORT_SYMBOL(zstd_dstream_workspace_bound);
     67
     68zstd_dstream *zstd_init_dstream(size_t max_window_size, void *workspace,
     69	size_t workspace_size)
     70{
     71	if (workspace == NULL)
     72		return NULL;
     73	(void)max_window_size;
     74	return ZSTD_initStaticDStream(workspace, workspace_size);
     75}
     76EXPORT_SYMBOL(zstd_init_dstream);
     77
     78size_t zstd_reset_dstream(zstd_dstream *dstream)
     79{
     80	return ZSTD_resetDStream(dstream);
     81}
     82EXPORT_SYMBOL(zstd_reset_dstream);
     83
     84size_t zstd_decompress_stream(zstd_dstream *dstream, zstd_out_buffer *output,
     85	zstd_in_buffer *input)
     86{
     87	return ZSTD_decompressStream(dstream, output, input);
     88}
     89EXPORT_SYMBOL(zstd_decompress_stream);
     90
     91size_t zstd_find_frame_compressed_size(const void *src, size_t src_size)
     92{
     93	return ZSTD_findFrameCompressedSize(src, src_size);
     94}
     95EXPORT_SYMBOL(zstd_find_frame_compressed_size);
     96
     97size_t zstd_get_frame_header(zstd_frame_header *header, const void *src,
     98	size_t src_size)
     99{
    100	return ZSTD_getFrameHeader(header, src, src_size);
    101}
    102EXPORT_SYMBOL(zstd_get_frame_header);
    103
    104MODULE_LICENSE("Dual BSD/GPL");
    105MODULE_DESCRIPTION("Zstd Decompressor");