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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287// 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/zstd_internal.h"#include "compress/zstd_compress_internal.h"
#define ZSTD_FORWARD_IF_ERR(ret) \ do { \ size_t const __ret = (ret); \ if (ZSTD_isError(__ret)) \ return __ret; \ } while (0)
static size_t zstd_cctx_init(zstd_cctx *cctx, const zstd_parameters *parameters, unsigned long long pledged_src_size){ ZSTD_FORWARD_IF_ERR(ZSTD_CCtx_reset( cctx, ZSTD_reset_session_and_parameters)); ZSTD_FORWARD_IF_ERR(ZSTD_CCtx_setPledgedSrcSize( cctx, pledged_src_size)); ZSTD_FORWARD_IF_ERR(ZSTD_CCtx_setParameter( cctx, ZSTD_c_windowLog, parameters->cParams.windowLog)); ZSTD_FORWARD_IF_ERR(ZSTD_CCtx_setParameter( cctx, ZSTD_c_hashLog, parameters->cParams.hashLog)); ZSTD_FORWARD_IF_ERR(ZSTD_CCtx_setParameter( cctx, ZSTD_c_chainLog, parameters->cParams.chainLog)); ZSTD_FORWARD_IF_ERR(ZSTD_CCtx_setParameter( cctx, ZSTD_c_searchLog, parameters->cParams.searchLog)); ZSTD_FORWARD_IF_ERR(ZSTD_CCtx_setParameter( cctx, ZSTD_c_minMatch, parameters->cParams.minMatch)); ZSTD_FORWARD_IF_ERR(ZSTD_CCtx_setParameter( cctx, ZSTD_c_targetLength, parameters->cParams.targetLength)); ZSTD_FORWARD_IF_ERR(ZSTD_CCtx_setParameter( cctx, ZSTD_c_strategy, parameters->cParams.strategy)); ZSTD_FORWARD_IF_ERR(ZSTD_CCtx_setParameter( cctx, ZSTD_c_contentSizeFlag, parameters->fParams.contentSizeFlag)); ZSTD_FORWARD_IF_ERR(ZSTD_CCtx_setParameter( cctx, ZSTD_c_checksumFlag, parameters->fParams.checksumFlag)); ZSTD_FORWARD_IF_ERR(ZSTD_CCtx_setParameter( cctx, ZSTD_c_dictIDFlag, !parameters->fParams.noDictIDFlag)); return 0;}
int zstd_min_clevel(void){ return ZSTD_minCLevel();}EXPORT_SYMBOL(zstd_min_clevel);
int zstd_max_clevel(void){ return ZSTD_maxCLevel();}EXPORT_SYMBOL(zstd_max_clevel);
int zstd_default_clevel(void){ return ZSTD_defaultCLevel();}EXPORT_SYMBOL(zstd_default_clevel);
size_t zstd_compress_bound(size_t src_size){ return ZSTD_compressBound(src_size);}EXPORT_SYMBOL(zstd_compress_bound);
zstd_parameters zstd_get_params(int level, unsigned long long estimated_src_size){ return ZSTD_getParams(level, estimated_src_size, 0);}EXPORT_SYMBOL(zstd_get_params);
zstd_compression_parameters zstd_get_cparams(int level, unsigned long long estimated_src_size, size_t dict_size){ return ZSTD_getCParams(level, estimated_src_size, dict_size);}EXPORT_SYMBOL(zstd_get_cparams);
size_t zstd_cctx_set_param(zstd_cctx *cctx, ZSTD_cParameter param, int value){ return ZSTD_CCtx_setParameter(cctx, param, value);}EXPORT_SYMBOL(zstd_cctx_set_param);
size_t zstd_cctx_workspace_bound(const zstd_compression_parameters *cparams){ return ZSTD_estimateCCtxSize_usingCParams(*cparams);}EXPORT_SYMBOL(zstd_cctx_workspace_bound);
// Used by zstd_cctx_workspace_bound_with_ext_seq_prod()static size_t dummy_external_sequence_producer( void *sequenceProducerState, ZSTD_Sequence *outSeqs, size_t outSeqsCapacity, const void *src, size_t srcSize, const void *dict, size_t dictSize, int compressionLevel, size_t windowSize){ (void)sequenceProducerState; (void)outSeqs; (void)outSeqsCapacity; (void)src; (void)srcSize; (void)dict; (void)dictSize; (void)compressionLevel; (void)windowSize; return ZSTD_SEQUENCE_PRODUCER_ERROR;}
static void init_cctx_params_from_compress_params( ZSTD_CCtx_params *cctx_params, const zstd_compression_parameters *compress_params){ ZSTD_parameters zstd_params; memset(&zstd_params, 0, sizeof(zstd_params)); zstd_params.cParams = *compress_params; ZSTD_CCtxParams_init_advanced(cctx_params, zstd_params);}
size_t zstd_cctx_workspace_bound_with_ext_seq_prod(const zstd_compression_parameters *compress_params){ ZSTD_CCtx_params cctx_params; init_cctx_params_from_compress_params(&cctx_params, compress_params); ZSTD_CCtxParams_registerSequenceProducer(&cctx_params, NULL, dummy_external_sequence_producer); return ZSTD_estimateCCtxSize_usingCCtxParams(&cctx_params);}EXPORT_SYMBOL(zstd_cctx_workspace_bound_with_ext_seq_prod);
size_t zstd_cstream_workspace_bound_with_ext_seq_prod(const zstd_compression_parameters *compress_params){ ZSTD_CCtx_params cctx_params; init_cctx_params_from_compress_params(&cctx_params, compress_params); ZSTD_CCtxParams_registerSequenceProducer(&cctx_params, NULL, dummy_external_sequence_producer); return ZSTD_estimateCStreamSize_usingCCtxParams(&cctx_params);}EXPORT_SYMBOL(zstd_cstream_workspace_bound_with_ext_seq_prod);
zstd_cctx *zstd_init_cctx(void *workspace, size_t workspace_size){ if (workspace == NULL) return NULL; return ZSTD_initStaticCCtx(workspace, workspace_size);}EXPORT_SYMBOL(zstd_init_cctx);
zstd_cctx *zstd_create_cctx_advanced(zstd_custom_mem custom_mem){ return ZSTD_createCCtx_advanced(custom_mem);}EXPORT_SYMBOL(zstd_create_cctx_advanced);
size_t zstd_free_cctx(zstd_cctx *cctx){ return ZSTD_freeCCtx(cctx);}EXPORT_SYMBOL(zstd_free_cctx);
zstd_cdict *zstd_create_cdict_byreference(const void *dict, size_t dict_size, zstd_compression_parameters cparams, zstd_custom_mem custom_mem){ return ZSTD_createCDict_advanced(dict, dict_size, ZSTD_dlm_byRef, ZSTD_dct_auto, cparams, custom_mem);}EXPORT_SYMBOL(zstd_create_cdict_byreference);
size_t zstd_free_cdict(zstd_cdict *cdict){ return ZSTD_freeCDict(cdict);}EXPORT_SYMBOL(zstd_free_cdict);
size_t zstd_compress_cctx(zstd_cctx *cctx, void *dst, size_t dst_capacity, const void *src, size_t src_size, const zstd_parameters *parameters){ ZSTD_FORWARD_IF_ERR(zstd_cctx_init(cctx, parameters, src_size)); return ZSTD_compress2(cctx, dst, dst_capacity, src, src_size);}EXPORT_SYMBOL(zstd_compress_cctx);
size_t zstd_compress_using_cdict(zstd_cctx *cctx, void *dst, size_t dst_capacity, const void *src, size_t src_size, const ZSTD_CDict *cdict){ return ZSTD_compress_usingCDict(cctx, dst, dst_capacity, src, src_size, cdict);}EXPORT_SYMBOL(zstd_compress_using_cdict);
size_t zstd_cstream_workspace_bound(const zstd_compression_parameters *cparams){ return ZSTD_estimateCStreamSize_usingCParams(*cparams);}EXPORT_SYMBOL(zstd_cstream_workspace_bound);
zstd_cstream *zstd_init_cstream(const zstd_parameters *parameters, unsigned long long pledged_src_size, void *workspace, size_t workspace_size){ zstd_cstream *cstream;
if (workspace == NULL) return NULL;
cstream = ZSTD_initStaticCStream(workspace, workspace_size); if (cstream == NULL) return NULL;
/* 0 means unknown in linux zstd API but means 0 in new zstd API */ if (pledged_src_size == 0) pledged_src_size = ZSTD_CONTENTSIZE_UNKNOWN;
if (ZSTD_isError(zstd_cctx_init(cstream, parameters, pledged_src_size))) return NULL;
return cstream;}EXPORT_SYMBOL(zstd_init_cstream);
size_t zstd_reset_cstream(zstd_cstream *cstream, unsigned long long pledged_src_size){ if (pledged_src_size == 0) pledged_src_size = ZSTD_CONTENTSIZE_UNKNOWN; ZSTD_FORWARD_IF_ERR( ZSTD_CCtx_reset(cstream, ZSTD_reset_session_only) ); ZSTD_FORWARD_IF_ERR( ZSTD_CCtx_setPledgedSrcSize(cstream, pledged_src_size) ); return 0;}EXPORT_SYMBOL(zstd_reset_cstream);
size_t zstd_compress_stream(zstd_cstream *cstream, zstd_out_buffer *output, zstd_in_buffer *input){ return ZSTD_compressStream(cstream, output, input);}EXPORT_SYMBOL(zstd_compress_stream);
size_t zstd_flush_stream(zstd_cstream *cstream, zstd_out_buffer *output){ return ZSTD_flushStream(cstream, output);}EXPORT_SYMBOL(zstd_flush_stream);
size_t zstd_end_stream(zstd_cstream *cstream, zstd_out_buffer *output){ return ZSTD_endStream(cstream, output);}EXPORT_SYMBOL(zstd_end_stream);
void zstd_register_sequence_producer( zstd_cctx *cctx, void* sequence_producer_state, zstd_sequence_producer_f sequence_producer) { ZSTD_registerSequenceProducer(cctx, sequence_producer_state, sequence_producer);}EXPORT_SYMBOL(zstd_register_sequence_producer);
size_t zstd_compress_sequences_and_literals(zstd_cctx *cctx, void* dst, size_t dst_capacity, const zstd_sequence *in_seqs, size_t in_seqs_size, const void* literals, size_t lit_size, size_t lit_capacity, size_t decompressed_size){ return ZSTD_compressSequencesAndLiterals(cctx, dst, dst_capacity, in_seqs, in_seqs_size, literals, lit_size, lit_capacity, decompressed_size);}EXPORT_SYMBOL(zstd_compress_sequences_and_literals);
MODULE_LICENSE("Dual BSD/GPL");MODULE_DESCRIPTION("Zstd Compressor");