67ea3a80d3
- ZSTD_resetDstream() is deprecated hence it is wise to make zstd_reset_dstream() functionally identical to ZSTD_resetDstream() as we have done for the compression stream in [1].
- Also make ZSTD_startingInputLength() visible for the decompression driver to be able to use it.
- This fixes the below warning:
../lib/zstd/zstd_decompress_module.c: In function 'zstd_reset_dstream':
../lib/zstd/zstd_decompress_module.c:80:9: warning: 'ZSTD_resetDStream' is deprecated [-Wdeprecated-declarations]
80 | return ZSTD_resetDStream(dstream);
| ^~~~~~
In file included from ../include/linux/zstd.h:26,
from ../lib/zstd/zstd_decompress_module.c:15:
../include/linux/zstd_lib.h:2569:27: note: declared here
2569 | ZSTDLIB_STATIC_API size_t ZSTD_resetDStream(ZSTD_DStream* zds);
| ^~~~~~~~~~~~~~~~~
[1]: https://github.com/facebook/zstd/pull/3088
Signed-off-by: Cyber Knight <cyberknight755@gmail.com>
109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
|
|
/*
|
|
* Copyright (c) Meta Platforms, Inc. and affiliates.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under both the BSD-style license (found in the
|
|
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
|
|
* in the COPYING file in the root directory of this source tree).
|
|
* You may select, at your option, one of the above-listed licenses.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/zstd.h>
|
|
|
|
#include "common/zstd_deps.h"
|
|
#include "common/error_private.h" /* error codes and messages */
|
|
#include "decompress/zstd_decompress_internal.h" /* ZSTD_DCtx */
|
|
|
|
/* Common symbols. zstd_compress must depend on zstd_decompress. */
|
|
|
|
unsigned int zstd_is_error(size_t code)
|
|
{
|
|
return ZSTD_isError(code);
|
|
}
|
|
EXPORT_SYMBOL(zstd_is_error);
|
|
|
|
zstd_error_code zstd_get_error_code(size_t code)
|
|
{
|
|
return ZSTD_getErrorCode(code);
|
|
}
|
|
EXPORT_SYMBOL(zstd_get_error_code);
|
|
|
|
const char *zstd_get_error_name(size_t code)
|
|
{
|
|
return ZSTD_getErrorName(code);
|
|
}
|
|
EXPORT_SYMBOL(zstd_get_error_name);
|
|
|
|
/* Decompression symbols. */
|
|
|
|
size_t zstd_dctx_workspace_bound(void)
|
|
{
|
|
return ZSTD_estimateDCtxSize();
|
|
}
|
|
EXPORT_SYMBOL(zstd_dctx_workspace_bound);
|
|
|
|
zstd_dctx *zstd_init_dctx(void *workspace, size_t workspace_size)
|
|
{
|
|
if (workspace == NULL)
|
|
return NULL;
|
|
return ZSTD_initStaticDCtx(workspace, workspace_size);
|
|
}
|
|
EXPORT_SYMBOL(zstd_init_dctx);
|
|
|
|
size_t zstd_decompress_dctx(zstd_dctx *dctx, void *dst, size_t dst_capacity,
|
|
const void *src, size_t src_size)
|
|
{
|
|
return ZSTD_decompressDCtx(dctx, dst, dst_capacity, src, src_size);
|
|
}
|
|
EXPORT_SYMBOL(zstd_decompress_dctx);
|
|
|
|
size_t zstd_dstream_workspace_bound(size_t max_window_size)
|
|
{
|
|
return ZSTD_estimateDStreamSize(max_window_size);
|
|
}
|
|
EXPORT_SYMBOL(zstd_dstream_workspace_bound);
|
|
|
|
zstd_dstream *zstd_init_dstream(size_t max_window_size, void *workspace,
|
|
size_t workspace_size)
|
|
{
|
|
if (workspace == NULL)
|
|
return NULL;
|
|
(void)max_window_size;
|
|
return ZSTD_initStaticDStream(workspace, workspace_size);
|
|
}
|
|
EXPORT_SYMBOL(zstd_init_dstream);
|
|
|
|
size_t zstd_reset_dstream(zstd_dstream *dstream)
|
|
{
|
|
FORWARD_IF_ERROR(ZSTD_DCtx_reset(dstream, ZSTD_reset_session_only), "");
|
|
return ZSTD_startingInputLength(dstream->format);
|
|
}
|
|
EXPORT_SYMBOL(zstd_reset_dstream);
|
|
|
|
size_t zstd_decompress_stream(zstd_dstream *dstream, zstd_out_buffer *output,
|
|
zstd_in_buffer *input)
|
|
{
|
|
return ZSTD_decompressStream(dstream, output, input);
|
|
}
|
|
EXPORT_SYMBOL(zstd_decompress_stream);
|
|
|
|
size_t zstd_find_frame_compressed_size(const void *src, size_t src_size)
|
|
{
|
|
return ZSTD_findFrameCompressedSize(src, src_size);
|
|
}
|
|
EXPORT_SYMBOL(zstd_find_frame_compressed_size);
|
|
|
|
size_t zstd_get_frame_header(zstd_frame_header *header, const void *src,
|
|
size_t src_size)
|
|
{
|
|
return ZSTD_getFrameHeader(header, src, src_size);
|
|
}
|
|
EXPORT_SYMBOL(zstd_get_frame_header);
|
|
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
MODULE_DESCRIPTION("Zstd Decompressor");
|