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Date: Fri, 10 May 2019 11:41:44 +0530
From: Maninder Singh <maninder1.s@...sung.com>
To: terrelln@...com, herbert@...dor.apana.org.au, davem@...emloft.net,
keescook@...omium.org, gustavo@...eddedor.com
Cc: linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
a.sahrawat@...sung.com, pankaj.m@...sung.com,
Maninder Singh <maninder1.s@...sung.com>,
Vaneet Narang <v.narang@...sung.com>
Subject: [PATCH 1/2] zstd: pass pointer rathen than structure to functions
currently params structure is passed in all functions, which increases
stack usage in all the function and lead to stack overflow on target like
ARM with kernel stack size of 8 KB so better to pass pointer.
Checked for ARM:
Original Patched
Call FLow Size: 1264 1040
....
(HUF_sort) -> 296
(HUF_buildCTable_wksp) -> 144
(HUF_compress4X_repeat) -> 88
(ZSTD_compressBlock_internal) -> 200
(ZSTD_compressContinue_internal)-> 136 -> 88
(ZSTD_compressCCtx) -> 192 -> 64
(zstd_compress) -> 144 -> 96
(crypto_compress) -> 32
(zcomp_compress) -> 32
....
Signed-off-by: Maninder Singh <maninder1.s@...sung.com>
Signed-off-by: Vaneet Narang <v.narang@...sung.com>
---
crypto/zstd.c | 2 +-
include/linux/zstd.h | 10 +++----
lib/zstd/compress.c | 82 ++++++++++++++++++++++++++--------------------------
3 files changed, 47 insertions(+), 47 deletions(-)
diff --git a/crypto/zstd.c b/crypto/zstd.c
index 2c04055..4e9ff22 100644
--- a/crypto/zstd.c
+++ b/crypto/zstd.c
@@ -162,7 +162,7 @@ static int __zstd_compress(const u8 *src, unsigned int slen,
struct zstd_ctx *zctx = ctx;
const ZSTD_parameters params = zstd_params();
- out_len = ZSTD_compressCCtx(zctx->cctx, dst, *dlen, src, slen, params);
+ out_len = ZSTD_compressCCtx(zctx->cctx, dst, *dlen, src, slen, ¶ms);
if (ZSTD_isError(out_len))
return -EINVAL;
*dlen = out_len;
diff --git a/include/linux/zstd.h b/include/linux/zstd.h
index 249575e..5103efa 100644
--- a/include/linux/zstd.h
+++ b/include/linux/zstd.h
@@ -254,7 +254,7 @@ ZSTD_CCtx *ZSTD_initCCtx(void *workspace, size_t workspaceSize);
* ZSTD_isError().
*/
size_t ZSTD_compressCCtx(ZSTD_CCtx *ctx, void *dst, size_t dstCapacity,
- const void *src, size_t srcSize, ZSTD_parameters params);
+ const void *src, size_t srcSize, const ZSTD_parameters *params);
/**
* ZSTD_DCtxWorkspaceBound() - amount of memory needed to initialize a ZSTD_DCtx
@@ -324,7 +324,7 @@ size_t ZSTD_decompressDCtx(ZSTD_DCtx *ctx, void *dst, size_t dstCapacity,
*/
size_t ZSTD_compress_usingDict(ZSTD_CCtx *ctx, void *dst, size_t dstCapacity,
const void *src, size_t srcSize, const void *dict, size_t dictSize,
- ZSTD_parameters params);
+ const ZSTD_parameters *params);
/**
* ZSTD_decompress_usingDict() - decompress src into dst using a dictionary
@@ -381,7 +381,7 @@ typedef struct ZSTD_CDict_s ZSTD_CDict;
* Return: The digested dictionary emplaced into workspace.
*/
ZSTD_CDict *ZSTD_initCDict(const void *dictBuffer, size_t dictSize,
- ZSTD_parameters params, void *workspace, size_t workspaceSize);
+ const ZSTD_parameters *params, void *workspace, size_t workspaceSize);
/**
* ZSTD_compress_usingCDict() - compress src into dst using a ZSTD_CDict
@@ -552,7 +552,7 @@ typedef struct ZSTD_CStream_s ZSTD_CStream;
*
* Return: The zstd streaming compression context.
*/
-ZSTD_CStream *ZSTD_initCStream(ZSTD_parameters params,
+ZSTD_CStream *ZSTD_initCStream(const ZSTD_parameters *params,
unsigned long long pledgedSrcSize, void *workspace,
size_t workspaceSize);
@@ -1006,7 +1006,7 @@ size_t ZSTD_compressBegin(ZSTD_CCtx *cctx, int compressionLevel);
size_t ZSTD_compressBegin_usingDict(ZSTD_CCtx *cctx, const void *dict,
size_t dictSize, int compressionLevel);
size_t ZSTD_compressBegin_advanced(ZSTD_CCtx *cctx, const void *dict,
- size_t dictSize, ZSTD_parameters params,
+ size_t dictSize, const ZSTD_parameters *params,
unsigned long long pledgedSrcSize);
size_t ZSTD_copyCCtx(ZSTD_CCtx *cctx, const ZSTD_CCtx *preparedCCtx,
unsigned long long pledgedSrcSize);
diff --git a/lib/zstd/compress.c b/lib/zstd/compress.c
index 5e0b670..a3e0578 100644
--- a/lib/zstd/compress.c
+++ b/lib/zstd/compress.c
@@ -206,18 +206,18 @@ ZSTD_compressionParameters ZSTD_adjustCParams(ZSTD_compressionParameters cPar, u
return cPar;
}
-static U32 ZSTD_equivalentParams(ZSTD_parameters param1, ZSTD_parameters param2)
+static U32 ZSTD_equivalentParams(const ZSTD_parameters *param1, const ZSTD_parameters *param2)
{
- return (param1.cParams.hashLog == param2.cParams.hashLog) & (param1.cParams.chainLog == param2.cParams.chainLog) &
- (param1.cParams.strategy == param2.cParams.strategy) & ((param1.cParams.searchLength == 3) == (param2.cParams.searchLength == 3));
+ return (param1->cParams.hashLog == param2->cParams.hashLog) & (param1->cParams.chainLog == param2->cParams.chainLog) &
+ (param1->cParams.strategy == param2->cParams.strategy) & ((param1->cParams.searchLength == 3) == (param2->cParams.searchLength == 3));
}
/*! ZSTD_continueCCtx() :
reuse CCtx without reset (note : requires no dictionary) */
-static size_t ZSTD_continueCCtx(ZSTD_CCtx *cctx, ZSTD_parameters params, U64 frameContentSize)
+static size_t ZSTD_continueCCtx(ZSTD_CCtx *cctx, const ZSTD_parameters *params, U64 frameContentSize)
{
U32 const end = (U32)(cctx->nextSrc - cctx->base);
- cctx->params = params;
+ cctx->params = *params;
cctx->frameContentSize = frameContentSize;
cctx->lowLimit = end;
cctx->dictLimit = end;
@@ -239,23 +239,23 @@ typedef enum { ZSTDcrp_continue, ZSTDcrp_noMemset, ZSTDcrp_fullReset } ZSTD_comp
/*! ZSTD_resetCCtx_advanced() :
note : `params` must be validated */
-static size_t ZSTD_resetCCtx_advanced(ZSTD_CCtx *zc, ZSTD_parameters params, U64 frameContentSize, ZSTD_compResetPolicy_e const crp)
+static size_t ZSTD_resetCCtx_advanced(ZSTD_CCtx *zc, const ZSTD_parameters *params, U64 frameContentSize, ZSTD_compResetPolicy_e const crp)
{
if (crp == ZSTDcrp_continue)
- if (ZSTD_equivalentParams(params, zc->params)) {
+ if (ZSTD_equivalentParams(params, &zc->params)) {
zc->flagStaticTables = 0;
zc->flagStaticHufTable = HUF_repeat_none;
return ZSTD_continueCCtx(zc, params, frameContentSize);
}
{
- size_t const blockSize = MIN(ZSTD_BLOCKSIZE_ABSOLUTEMAX, (size_t)1 << params.cParams.windowLog);
- U32 const divider = (params.cParams.searchLength == 3) ? 3 : 4;
+ size_t const blockSize = MIN(ZSTD_BLOCKSIZE_ABSOLUTEMAX, (size_t)1 << params->cParams.windowLog);
+ U32 const divider = (params->cParams.searchLength == 3) ? 3 : 4;
size_t const maxNbSeq = blockSize / divider;
size_t const tokenSpace = blockSize + 11 * maxNbSeq;
- size_t const chainSize = (params.cParams.strategy == ZSTD_fast) ? 0 : (1 << params.cParams.chainLog);
- size_t const hSize = ((size_t)1) << params.cParams.hashLog;
- U32 const hashLog3 = (params.cParams.searchLength > 3) ? 0 : MIN(ZSTD_HASHLOG3_MAX, params.cParams.windowLog);
+ size_t const chainSize = (params->cParams.strategy == ZSTD_fast) ? 0 : (1 << params->cParams.chainLog);
+ size_t const hSize = ((size_t)1) << params->cParams.hashLog;
+ U32 const hashLog3 = (params->cParams.searchLength > 3) ? 0 : MIN(ZSTD_HASHLOG3_MAX, params->cParams.windowLog);
size_t const h3Size = ((size_t)1) << hashLog3;
size_t const tableSpace = (chainSize + hSize + h3Size) * sizeof(U32);
void *ptr;
@@ -265,7 +265,7 @@ static size_t ZSTD_resetCCtx_advanced(ZSTD_CCtx *zc, ZSTD_parameters params, U64
size_t const optSpace = ((MaxML + 1) + (MaxLL + 1) + (MaxOff + 1) + (1 << Litbits)) * sizeof(U32) +
(ZSTD_OPT_NUM + 1) * (sizeof(ZSTD_match_t) + sizeof(ZSTD_optimal_t));
size_t const neededSpace = tableSpace + (256 * sizeof(U32)) /* huffTable */ + tokenSpace +
- (((params.cParams.strategy == ZSTD_btopt) || (params.cParams.strategy == ZSTD_btopt2)) ? optSpace : 0);
+ (((params->cParams.strategy == ZSTD_btopt) || (params->cParams.strategy == ZSTD_btopt2)) ? optSpace : 0);
if (zc->workSpaceSize < neededSpace) {
ZSTD_free(zc->workSpace, zc->customMem);
zc->workSpace = ZSTD_malloc(neededSpace, zc->customMem);
@@ -294,7 +294,7 @@ static size_t ZSTD_resetCCtx_advanced(ZSTD_CCtx *zc, ZSTD_parameters params, U64
zc->dictBase = NULL;
zc->dictLimit = 0;
zc->lowLimit = 0;
- zc->params = params;
+ zc->params = *params;
zc->blockSize = blockSize;
zc->frameContentSize = frameContentSize;
{
@@ -303,7 +303,7 @@ static size_t ZSTD_resetCCtx_advanced(ZSTD_CCtx *zc, ZSTD_parameters params, U64
zc->rep[i] = repStartValue[i];
}
- if ((params.cParams.strategy == ZSTD_btopt) || (params.cParams.strategy == ZSTD_btopt2)) {
+ if ((params->cParams.strategy == ZSTD_btopt) || (params->cParams.strategy == ZSTD_btopt2)) {
zc->seqStore.litFreq = (U32 *)ptr;
zc->seqStore.litLengthFreq = zc->seqStore.litFreq + (1 << Litbits);
zc->seqStore.matchLengthFreq = zc->seqStore.litLengthFreq + (MaxLL + 1);
@@ -354,7 +354,7 @@ size_t ZSTD_copyCCtx(ZSTD_CCtx *dstCCtx, const ZSTD_CCtx *srcCCtx, unsigned long
{
ZSTD_parameters params = srcCCtx->params;
params.fParams.contentSizeFlag = (pledgedSrcSize > 0);
- ZSTD_resetCCtx_advanced(dstCCtx, params, pledgedSrcSize, ZSTDcrp_noMemset);
+ ZSTD_resetCCtx_advanced(dstCCtx, ¶ms, pledgedSrcSize, ZSTDcrp_noMemset);
}
/* copy tables */
@@ -2428,16 +2428,16 @@ static size_t ZSTD_compress_generic(ZSTD_CCtx *cctx, void *dst, size_t dstCapaci
return op - ostart;
}
-static size_t ZSTD_writeFrameHeader(void *dst, size_t dstCapacity, ZSTD_parameters params, U64 pledgedSrcSize, U32 dictID)
+static size_t ZSTD_writeFrameHeader(void *dst, size_t dstCapacity, ZSTD_parameters *params, U64 pledgedSrcSize, U32 dictID)
{
BYTE *const op = (BYTE *)dst;
U32 const dictIDSizeCode = (dictID > 0) + (dictID >= 256) + (dictID >= 65536); /* 0-3 */
- U32 const checksumFlag = params.fParams.checksumFlag > 0;
- U32 const windowSize = 1U << params.cParams.windowLog;
- U32 const singleSegment = params.fParams.contentSizeFlag && (windowSize >= pledgedSrcSize);
- BYTE const windowLogByte = (BYTE)((params.cParams.windowLog - ZSTD_WINDOWLOG_ABSOLUTEMIN) << 3);
+ U32 const checksumFlag = params->fParams.checksumFlag > 0;
+ U32 const windowSize = 1U << params->cParams.windowLog;
+ U32 const singleSegment = params->fParams.contentSizeFlag && (windowSize >= pledgedSrcSize);
+ BYTE const windowLogByte = (BYTE)((params->cParams.windowLog - ZSTD_WINDOWLOG_ABSOLUTEMIN) << 3);
U32 const fcsCode =
- params.fParams.contentSizeFlag ? (pledgedSrcSize >= 256) + (pledgedSrcSize >= 65536 + 256) + (pledgedSrcSize >= 0xFFFFFFFFU) : 0; /* 0-3 */
+ params->fParams.contentSizeFlag ? (pledgedSrcSize >= 256) + (pledgedSrcSize >= 65536 + 256) + (pledgedSrcSize >= 0xFFFFFFFFU) : 0; /* 0-3 */
BYTE const frameHeaderDecriptionByte = (BYTE)(dictIDSizeCode + (checksumFlag << 2) + (singleSegment << 5) + (fcsCode << 6));
size_t pos;
@@ -2496,7 +2496,7 @@ static size_t ZSTD_compressContinue_internal(ZSTD_CCtx *cctx, void *dst, size_t
return ERROR(stage_wrong); /* missing init (ZSTD_compressBegin) */
if (frame && (cctx->stage == ZSTDcs_init)) {
- fhSize = ZSTD_writeFrameHeader(dst, dstCapacity, cctx->params, cctx->frameContentSize, cctx->dictID);
+ fhSize = ZSTD_writeFrameHeader(dst, dstCapacity, &cctx->params, cctx->frameContentSize, cctx->dictID);
if (ZSTD_isError(fhSize))
return fhSize;
dstCapacity -= fhSize;
@@ -2735,7 +2735,7 @@ static size_t ZSTD_compress_insertDictionary(ZSTD_CCtx *cctx, const void *dict,
/*! ZSTD_compressBegin_internal() :
* @return : 0, or an error code */
-static size_t ZSTD_compressBegin_internal(ZSTD_CCtx *cctx, const void *dict, size_t dictSize, ZSTD_parameters params, U64 pledgedSrcSize)
+static size_t ZSTD_compressBegin_internal(ZSTD_CCtx *cctx, const void *dict, size_t dictSize, const ZSTD_parameters *params, U64 pledgedSrcSize)
{
ZSTD_compResetPolicy_e const crp = dictSize ? ZSTDcrp_fullReset : ZSTDcrp_continue;
CHECK_F(ZSTD_resetCCtx_advanced(cctx, params, pledgedSrcSize, crp));
@@ -2744,17 +2744,17 @@ static size_t ZSTD_compressBegin_internal(ZSTD_CCtx *cctx, const void *dict, siz
/*! ZSTD_compressBegin_advanced() :
* @return : 0, or an error code */
-size_t ZSTD_compressBegin_advanced(ZSTD_CCtx *cctx, const void *dict, size_t dictSize, ZSTD_parameters params, unsigned long long pledgedSrcSize)
+size_t ZSTD_compressBegin_advanced(ZSTD_CCtx *cctx, const void *dict, size_t dictSize, const ZSTD_parameters *params, unsigned long long pledgedSrcSize)
{
/* compression parameters verification and optimization */
- CHECK_F(ZSTD_checkCParams(params.cParams));
+ CHECK_F(ZSTD_checkCParams(params->cParams));
return ZSTD_compressBegin_internal(cctx, dict, dictSize, params, pledgedSrcSize);
}
size_t ZSTD_compressBegin_usingDict(ZSTD_CCtx *cctx, const void *dict, size_t dictSize, int compressionLevel)
{
ZSTD_parameters const params = ZSTD_getParams(compressionLevel, 0, dictSize);
- return ZSTD_compressBegin_internal(cctx, dict, dictSize, params, 0);
+ return ZSTD_compressBegin_internal(cctx, dict, dictSize, ¶ms, 0);
}
size_t ZSTD_compressBegin(ZSTD_CCtx *cctx, int compressionLevel) { return ZSTD_compressBegin_usingDict(cctx, NULL, 0, compressionLevel); }
@@ -2773,7 +2773,7 @@ static size_t ZSTD_writeEpilogue(ZSTD_CCtx *cctx, void *dst, size_t dstCapacity)
/* special case : empty frame */
if (cctx->stage == ZSTDcs_init) {
- fhSize = ZSTD_writeFrameHeader(dst, dstCapacity, cctx->params, 0, 0);
+ fhSize = ZSTD_writeFrameHeader(dst, dstCapacity, &cctx->params, 0, 0);
if (ZSTD_isError(fhSize))
return fhSize;
dstCapacity -= fhSize;
@@ -2816,19 +2816,19 @@ size_t ZSTD_compressEnd(ZSTD_CCtx *cctx, void *dst, size_t dstCapacity, const vo
}
static size_t ZSTD_compress_internal(ZSTD_CCtx *cctx, void *dst, size_t dstCapacity, const void *src, size_t srcSize, const void *dict, size_t dictSize,
- ZSTD_parameters params)
+ const ZSTD_parameters *params)
{
CHECK_F(ZSTD_compressBegin_internal(cctx, dict, dictSize, params, srcSize));
return ZSTD_compressEnd(cctx, dst, dstCapacity, src, srcSize);
}
size_t ZSTD_compress_usingDict(ZSTD_CCtx *ctx, void *dst, size_t dstCapacity, const void *src, size_t srcSize, const void *dict, size_t dictSize,
- ZSTD_parameters params)
+ const ZSTD_parameters *params)
{
return ZSTD_compress_internal(ctx, dst, dstCapacity, src, srcSize, dict, dictSize, params);
}
-size_t ZSTD_compressCCtx(ZSTD_CCtx *ctx, void *dst, size_t dstCapacity, const void *src, size_t srcSize, ZSTD_parameters params)
+size_t ZSTD_compressCCtx(ZSTD_CCtx *ctx, void *dst, size_t dstCapacity, const void *src, size_t srcSize, const ZSTD_parameters *params)
{
return ZSTD_compress_internal(ctx, dst, dstCapacity, src, srcSize, NULL, 0, params);
}
@@ -2844,7 +2844,7 @@ struct ZSTD_CDict_s {
size_t ZSTD_CDictWorkspaceBound(ZSTD_compressionParameters cParams) { return ZSTD_CCtxWorkspaceBound(cParams) + ZSTD_ALIGN(sizeof(ZSTD_CDict)); }
-static ZSTD_CDict *ZSTD_createCDict_advanced(const void *dictBuffer, size_t dictSize, unsigned byReference, ZSTD_parameters params, ZSTD_customMem customMem)
+static ZSTD_CDict *ZSTD_createCDict_advanced(const void *dictBuffer, size_t dictSize, unsigned byReference, const ZSTD_parameters *params, ZSTD_customMem customMem)
{
if (!customMem.customAlloc || !customMem.customFree)
return NULL;
@@ -2890,7 +2890,7 @@ static ZSTD_CDict *ZSTD_createCDict_advanced(const void *dictBuffer, size_t dict
}
}
-ZSTD_CDict *ZSTD_initCDict(const void *dict, size_t dictSize, ZSTD_parameters params, void *workspace, size_t workspaceSize)
+ZSTD_CDict *ZSTD_initCDict(const void *dict, size_t dictSize, const ZSTD_parameters *params, void *workspace, size_t workspaceSize)
{
ZSTD_customMem const stackMem = ZSTD_initStack(workspace, workspaceSize);
return ZSTD_createCDict_advanced(dict, dictSize, 1, params, stackMem);
@@ -2918,7 +2918,7 @@ size_t ZSTD_compressBegin_usingCDict(ZSTD_CCtx *cctx, const ZSTD_CDict *cdict, u
else {
ZSTD_parameters params = cdict->refContext->params;
params.fParams.contentSizeFlag = (pledgedSrcSize > 0);
- CHECK_F(ZSTD_compressBegin_advanced(cctx, NULL, 0, params, pledgedSrcSize));
+ CHECK_F(ZSTD_compressBegin_advanced(cctx, NULL, 0, ¶ms, pledgedSrcSize));
}
return 0;
}
@@ -3031,7 +3031,7 @@ static size_t ZSTD_resetCStream_internal(ZSTD_CStream *zcs, unsigned long long p
if (zcs->cdict)
CHECK_F(ZSTD_compressBegin_usingCDict(zcs->cctx, zcs->cdict, pledgedSrcSize))
else
- CHECK_F(ZSTD_compressBegin_advanced(zcs->cctx, NULL, 0, zcs->params, pledgedSrcSize));
+ CHECK_F(ZSTD_compressBegin_advanced(zcs->cctx, NULL, 0, &zcs->params, pledgedSrcSize));
zcs->inToCompress = 0;
zcs->inBuffPos = 0;
@@ -3052,11 +3052,11 @@ size_t ZSTD_resetCStream(ZSTD_CStream *zcs, unsigned long long pledgedSrcSize)
return ZSTD_resetCStream_internal(zcs, pledgedSrcSize);
}
-static size_t ZSTD_initCStream_advanced(ZSTD_CStream *zcs, const void *dict, size_t dictSize, ZSTD_parameters params, unsigned long long pledgedSrcSize)
+static size_t ZSTD_initCStream_advanced(ZSTD_CStream *zcs, const void *dict, size_t dictSize, const ZSTD_parameters *params, unsigned long long pledgedSrcSize)
{
/* allocate buffers */
{
- size_t const neededInBuffSize = (size_t)1 << params.cParams.windowLog;
+ size_t const neededInBuffSize = (size_t)1 << params->cParams.windowLog;
if (zcs->inBuffSize < neededInBuffSize) {
zcs->inBuffSize = neededInBuffSize;
ZSTD_free(zcs->inBuff, zcs->customMem);
@@ -3083,13 +3083,13 @@ static size_t ZSTD_initCStream_advanced(ZSTD_CStream *zcs, const void *dict, siz
} else
zcs->cdict = NULL;
- zcs->checksum = params.fParams.checksumFlag > 0;
- zcs->params = params;
+ zcs->checksum = params->fParams.checksumFlag > 0;
+ zcs->params = *params;
return ZSTD_resetCStream_internal(zcs, pledgedSrcSize);
}
-ZSTD_CStream *ZSTD_initCStream(ZSTD_parameters params, unsigned long long pledgedSrcSize, void *workspace, size_t workspaceSize)
+ZSTD_CStream *ZSTD_initCStream(const ZSTD_parameters *params, unsigned long long pledgedSrcSize, void *workspace, size_t workspaceSize)
{
ZSTD_customMem const stackMem = ZSTD_initStack(workspace, workspaceSize);
ZSTD_CStream *const zcs = ZSTD_createCStream_advanced(stackMem);
@@ -3105,7 +3105,7 @@ ZSTD_CStream *ZSTD_initCStream(ZSTD_parameters params, unsigned long long pledge
ZSTD_CStream *ZSTD_initCStream_usingCDict(const ZSTD_CDict *cdict, unsigned long long pledgedSrcSize, void *workspace, size_t workspaceSize)
{
ZSTD_parameters const params = ZSTD_getParamsFromCDict(cdict);
- ZSTD_CStream *const zcs = ZSTD_initCStream(params, pledgedSrcSize, workspace, workspaceSize);
+ ZSTD_CStream *const zcs = ZSTD_initCStream(¶ms, pledgedSrcSize, workspace, workspaceSize);
if (zcs) {
zcs->cdict = cdict;
if (ZSTD_isError(ZSTD_resetCStream_internal(zcs, pledgedSrcSize))) {
--
2.7.4
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