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zlib_accel.cpp
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// Copyright (C) 2025 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "zlib_accel.h"
#include <dlfcn.h>
#include <fcntl.h>
#include <sys/param.h>
#include <unistd.h>
#include <cstring>
#include <functional>
#include <iostream>
#include <limits>
#include <mutex>
#include <shared_mutex>
#include <unordered_map>
#include "config/config.h"
#include "logging.h"
#include "sharded_map.h"
#ifdef USE_IAA
#include "iaa.h"
#endif
#ifdef USE_QAT
#include "qat.h"
#endif
// Disable cfi-icall as it makes calls to orig* functions fail
#if defined(__clang__)
#pragma clang attribute push(__attribute__((no_sanitize("cfi-icall"))), \
apply_to = function)
#endif
// Original zlib functions
static int (*orig_deflateInit_)(z_streamp strm, int level, const char* version,
int stream_size);
static int (*orig_deflateInit2_)(z_streamp strm, int level, int method,
int window_bits, int mem_level, int strategy,
const char* version, int stream_size);
static int (*orig_deflate)(z_streamp strm, int flush);
static int (*orig_deflateEnd)(z_streamp strm);
static int (*orig_deflateReset)(z_streamp strm);
static int (*orig_inflateInit_)(z_streamp strm, const char* version,
int stream_size);
static int (*orig_inflateInit2_)(z_streamp strm, int window_bits,
const char* version, int stream_size);
static int (*orig_inflate)(z_streamp strm, int flush);
static int (*orig_inflateEnd)(z_streamp strm);
static int (*orig_inflateReset)(z_streamp strm);
static int (*orig_compress)(Bytef* dest, uLongf* destLen, const Bytef* source,
uLong sourceLen);
static int (*orig_compress2)(Bytef* dest, uLongf* destLen, const Bytef* source,
uLong sourceLen, int level);
static int (*orig_uncompress)(Bytef* dest, uLongf* destLen, const Bytef* source,
uLong sourceLen);
static int (*orig_uncompress2)(Bytef* dest, uLongf* destLen,
const Bytef* source, uLong* sourceLen);
static gzFile (*orig_gzopen)(const char* path, const char* mode);
static gzFile (*orig_gzdopen)(int fd, const char* mode);
static int (*orig_gzwrite)(gzFile file, voidpc buf, unsigned len);
static int (*orig_gzread)(gzFile file, voidp buf, unsigned len);
static int (*orig_gzclose)(gzFile file);
static int (*orig_gzeof)(gzFile file);
// Initialize/cleanup functions when library is loaded
static int init_zlib_accel(void) __attribute__((constructor));
static void cleanup_zlib_accel(void) __attribute__((destructor));
static int init_zlib_accel(void) {
orig_deflateInit_ =
reinterpret_cast<int (*)(z_streamp, int, const char*, int)>(
dlsym(RTLD_NEXT, "deflateInit_"));
orig_deflateInit2_ =
reinterpret_cast<int (*)(z_streamp, int, int, int, int, int, const char*,
int)>(dlsym(RTLD_NEXT, "deflateInit2_"));
orig_deflate =
reinterpret_cast<int (*)(z_streamp, int)>(dlsym(RTLD_NEXT, "deflate"));
orig_deflateEnd =
reinterpret_cast<int (*)(z_streamp)>(dlsym(RTLD_NEXT, "deflateEnd"));
orig_deflateReset =
reinterpret_cast<int (*)(z_streamp)>(dlsym(RTLD_NEXT, "deflateReset"));
orig_inflateInit_ = reinterpret_cast<int (*)(z_streamp, const char*, int)>(
dlsym(RTLD_NEXT, "inflateInit_"));
orig_inflateInit2_ =
reinterpret_cast<int (*)(z_streamp, int, const char*, int)>(
dlsym(RTLD_NEXT, "inflateInit2_"));
orig_inflate =
reinterpret_cast<int (*)(z_streamp, int)>(dlsym(RTLD_NEXT, "inflate"));
orig_inflateEnd =
reinterpret_cast<int (*)(z_streamp)>(dlsym(RTLD_NEXT, "inflateEnd"));
orig_inflateReset =
reinterpret_cast<int (*)(z_streamp)>(dlsym(RTLD_NEXT, "inflateReset"));
orig_compress =
reinterpret_cast<int (*)(Bytef*, uLongf*, const Bytef*, uLong)>(
dlsym(RTLD_NEXT, "compress"));
orig_compress2 =
reinterpret_cast<int (*)(Bytef*, uLongf*, const Bytef*, uLong, int)>(
dlsym(RTLD_NEXT, "compress2"));
orig_uncompress =
reinterpret_cast<int (*)(Bytef*, uLongf*, const Bytef*, uLong)>(
dlsym(RTLD_NEXT, "uncompress"));
orig_uncompress2 =
reinterpret_cast<int (*)(Bytef*, uLongf*, const Bytef*, uLong*)>(
dlsym(RTLD_NEXT, "uncompress2"));
orig_gzopen = reinterpret_cast<gzFile (*)(const char*, const char*)>(
dlsym(RTLD_NEXT, "gzopen"));
orig_gzdopen = reinterpret_cast<gzFile (*)(int, const char*)>(
dlsym(RTLD_NEXT, "gzdopen"));
orig_gzwrite = reinterpret_cast<int (*)(gzFile, voidpc, unsigned)>(
dlsym(RTLD_NEXT, "gzwrite"));
orig_gzread = reinterpret_cast<int (*)(gzFile, voidp, unsigned)>(
dlsym(RTLD_NEXT, "gzread"));
orig_gzclose = reinterpret_cast<int (*)(gzFile)>(dlsym(RTLD_NEXT, "gzclose"));
orig_gzeof = reinterpret_cast<int (*)(gzFile)>(dlsym(RTLD_NEXT, "gzeof"));
std::string config_file_content;
config::LoadConfigFile(config_file_content);
#ifdef DEBUG_LOG
if (!config::log_file.empty()) {
CreateLogFile(config::log_file.c_str());
}
Log(LogLevel::LOG_INFO, config_file_content.c_str());
#endif
return 0;
}
static void cleanup_zlib_accel(void) {
#ifdef DEBUG_LOG
CloseLogFile();
#endif
}
// Avoid recursive call (e.g., if QATzip falls back to zlib internally)
static thread_local bool in_call = false;
struct DeflateSettings {
DeflateSettings(int _level, int _method, int _window_bits, int _mem_level,
int _strategy)
: level(_level),
method(_method),
window_bits(_window_bits),
mem_level(_mem_level),
strategy(_strategy) {}
int level;
int method;
int window_bits;
int mem_level;
int strategy;
ExecutionPath path = UNDEFINED;
};
struct InflateSettings {
InflateSettings(int _window_bits) : window_bits(_window_bits) {}
int window_bits;
ExecutionPath path = UNDEFINED;
};
class DeflateStreamSettings {
public:
void Set(z_streamp strm, int level, int method, int window_bits,
int mem_level, int strategy) {
DeflateSettings* settings =
new DeflateSettings(level, method, window_bits, mem_level, strategy);
map.Set(strm, settings);
}
void Unset(z_streamp strm) { map.Unset(strm); }
DeflateSettings* Get(z_streamp strm) { return map.Get(strm); }
private:
ShardedMap<z_streamp, DeflateSettings*> map;
};
DeflateStreamSettings deflate_stream_settings;
class InflateStreamSettings {
public:
void Set(z_streamp strm, int window_bits) {
InflateSettings* settings = new InflateSettings(window_bits);
map.Set(strm, settings);
}
void Unset(z_streamp strm) { map.Unset(strm); }
InflateSettings* Get(z_streamp strm) { return map.Get(strm); }
private:
ShardedMap<z_streamp, InflateSettings*> map;
};
InflateStreamSettings inflate_stream_settings;
int ZEXPORT deflateInit_(z_streamp strm, int level, const char* version,
int stream_size) {
Log(LogLevel::LOG_INFO, "deflateInit_ Line %d, strm %p, level %d\n", __LINE__,
strm, level);
deflate_stream_settings.Set(strm, level, Z_DEFLATED, 15, 8,
Z_DEFAULT_STRATEGY);
return orig_deflateInit_(strm, level, version, stream_size);
}
int ZEXPORT deflateInit2_(z_streamp strm, int level, int method,
int window_bits, int mem_level, int strategy,
const char* version, int stream_size) {
Log(LogLevel::LOG_INFO,
"deflateInit2_ Line %d, strm %p, level %d, window_bits %d \n", __LINE__,
strm, level, window_bits);
deflate_stream_settings.Set(strm, level, method, window_bits, mem_level,
strategy);
return orig_deflateInit2_(strm, level, method, window_bits, mem_level,
strategy, version, stream_size);
}
int ZEXPORT deflate(z_streamp strm, int flush) {
DeflateSettings* deflate_settings = deflate_stream_settings.Get(strm);
Log(LogLevel::LOG_INFO,
"deflate Line %d, strm %p, avail_in %d, avail_out %d, flush %d, in_call "
"%d, path %d\n",
__LINE__, strm, strm->avail_in, strm->avail_out, flush, in_call,
deflate_settings->path);
int ret = 1;
bool iaa_available = false;
bool qat_available = false;
if (!in_call && flush == Z_FINISH && deflate_settings->path != ZLIB) {
uint32_t input_len = strm->avail_in;
uint32_t output_len = strm->avail_out;
#ifdef USE_IAA
iaa_available = config::use_iaa_compress &&
SupportedOptionsIAA(deflate_settings->window_bits,
input_len, output_len);
#endif
#ifdef USE_QAT
qat_available =
config::use_qat_compress &&
SupportedOptionsQAT(deflate_settings->window_bits, input_len);
#endif
// If both accelerators are enabled, send configured ratio of requests to
// one or the other
ExecutionPath path_selected = ZLIB;
if (iaa_available && qat_available) {
if (std::rand() % 100 < config::iaa_compress_percentage) {
path_selected = IAA;
} else {
path_selected = QAT;
}
} else if (iaa_available) {
path_selected = IAA;
} else if (qat_available) {
path_selected = QAT;
}
if (path_selected == IAA) {
#ifdef USE_IAA
in_call = true;
ret = CompressIAA(strm->next_in, &input_len, strm->next_out, &output_len,
qpl_path_hardware, deflate_settings->window_bits);
deflate_settings->path = IAA;
in_call = false;
#endif // USE_IAA
} else if (path_selected == QAT) {
#ifdef USE_QAT
in_call = true;
ret = CompressQAT(strm->next_in, &input_len, strm->next_out, &output_len,
deflate_settings->window_bits);
deflate_settings->path = QAT;
in_call = false;
#endif // USE_QAT
}
if (ret == 0) {
strm->next_in += input_len;
strm->avail_in -= input_len;
strm->total_in += input_len;
strm->next_out += output_len;
strm->avail_out -= output_len;
strm->total_out += output_len;
if (strm->avail_in == 0) {
ret = Z_STREAM_END;
} else {
ret = Z_BUF_ERROR;
}
Log(LogLevel::LOG_INFO,
"deflate Line %d, strm %p, accelerator return code %d, avail_in %d, "
"avail_out %d, path %d\n",
__LINE__, strm, ret, strm->avail_in, strm->avail_out,
deflate_settings->path);
return ret;
}
}
if (in_call || config::use_zlib_compress) {
ret = orig_deflate(strm, flush);
if (!in_call) {
deflate_settings->path = ZLIB;
}
} else {
ret = Z_DATA_ERROR;
}
Log(LogLevel::LOG_INFO,
"deflate Line %d, strm %p, zlib return code %d, avail_in %d, "
"avail_out %d, path %d\n",
__LINE__, strm, ret, strm->avail_in, strm->avail_out,
deflate_settings->path);
return ret;
}
int ZEXPORT deflateEnd(z_streamp strm) {
Log(LogLevel::LOG_INFO, "deflateEnd Line %d, strm %p\n", __LINE__, strm);
deflate_stream_settings.Unset(strm);
return orig_deflateEnd(strm);
}
int ZEXPORT deflateReset(z_streamp strm) {
Log(LogLevel::LOG_INFO, "deflateReset Line %d, strm %p\n", __LINE__, strm);
DeflateSettings* deflate_settings = deflate_stream_settings.Get(strm);
if (deflate_settings != nullptr) {
deflate_settings->path = UNDEFINED;
}
return orig_deflateReset(strm);
}
int ZEXPORT inflateInit_(z_streamp strm, const char* version, int stream_size) {
inflate_stream_settings.Set(strm, 15);
Log(LogLevel::LOG_INFO, "inflateInit_ Line %d, strm %p\n", __LINE__, strm);
return orig_inflateInit_(strm, version, stream_size);
}
int ZEXPORT inflateInit2_(z_streamp strm, int window_bits, const char* version,
int stream_size) {
inflate_stream_settings.Set(strm, window_bits);
Log(LogLevel::LOG_INFO, "inflateInit2_ Line %d, strm %p, window_bits %d\n",
__LINE__, strm, window_bits);
return orig_inflateInit2_(strm, window_bits, version, stream_size);
}
int ZEXPORT inflate(z_streamp strm, int flush) {
InflateSettings* inflate_settings = inflate_stream_settings.Get(strm);
Log(LogLevel::LOG_INFO,
"inflate Line %d, strm %p, avail_in %d, avail_out %d, flush %d, in_call "
"%d, path %d\n",
__LINE__, strm, strm->avail_in, strm->avail_out, flush, in_call,
inflate_settings->path);
PrintDeflateBlockHeader(LogLevel::LOG_INFO, strm->next_in, strm->avail_in,
inflate_settings->window_bits);
int ret = 1;
bool end_of_stream = true;
bool iaa_available = false;
bool qat_available = false;
if (!in_call && strm->avail_in > 0 && inflate_settings->path != ZLIB) {
uint32_t input_len = strm->avail_in;
uint32_t output_len = strm->avail_out;
#ifdef USE_IAA
iaa_available = config::use_iaa_uncompress &&
SupportedOptionsIAA(inflate_settings->window_bits,
input_len, output_len) &&
IsIAADecompressible(strm->next_in, input_len,
inflate_settings->window_bits);
#endif
#ifdef USE_QAT
qat_available =
config::use_qat_uncompress &&
SupportedOptionsQAT(inflate_settings->window_bits, input_len);
#endif
// If both accelerators are enabled, send configured ratio of requests to
// one or the other
ExecutionPath path_selected = ZLIB;
if (iaa_available && qat_available) {
if (std::rand() % 100 < config::iaa_uncompress_percentage) {
path_selected = IAA;
} else {
path_selected = QAT;
}
} else if (iaa_available) {
path_selected = IAA;
} else if (qat_available) {
path_selected = QAT;
}
if (path_selected == IAA) {
#ifdef USE_IAA
in_call = true;
ret = UncompressIAA(strm->next_in, &input_len, strm->next_out,
&output_len, qpl_path_hardware,
inflate_settings->window_bits, &end_of_stream);
inflate_settings->path = IAA;
in_call = false;
#endif // USE_IAA
} else if (path_selected == QAT) {
#ifdef USE_QAT
in_call = true;
ret =
UncompressQAT(strm->next_in, &input_len, strm->next_out, &output_len,
inflate_settings->window_bits, &end_of_stream);
inflate_settings->path = QAT;
// QATzip does not support stateful decompression
// Fall back to zlib if end-of-stream not reached in one call
if (!end_of_stream) {
ret = 1;
}
in_call = false;
#endif // USE_QAT
}
if (ret == 0) {
strm->next_in += input_len;
strm->avail_in -= input_len;
strm->total_in += input_len;
strm->next_out += output_len;
strm->avail_out -= output_len;
strm->total_out += output_len;
if (input_len > 0 || output_len > 0) {
if (end_of_stream) {
ret = Z_STREAM_END;
} else {
ret = Z_OK;
}
} else {
ret = Z_BUF_ERROR;
}
Log(LogLevel::LOG_INFO,
"inflate Line %d, strm %p, accelerator return code %d, avail_in %d, "
"avail_out %d, end_of_stream %d, path %d\n",
__LINE__, strm, ret, strm->avail_in, strm->avail_out, end_of_stream,
inflate_settings->path);
return ret;
}
}
if (in_call || config::use_zlib_uncompress) {
ret = orig_inflate(strm, flush);
if (!in_call) {
inflate_settings->path = ZLIB;
}
} else {
ret = Z_DATA_ERROR;
}
Log(LogLevel::LOG_INFO,
"inflate Line %d, strm %p, zlib return code %d, avail_in %d, avail_out "
"%d, path %d\n",
__LINE__, strm, ret, strm->avail_in, strm->avail_out,
inflate_settings->path);
return ret;
}
int ZEXPORT inflateEnd(z_streamp strm) {
Log(LogLevel::LOG_INFO, "inflateEnd Line %d, strm %p\n", __LINE__, strm);
inflate_stream_settings.Unset(strm);
return orig_inflateEnd(strm);
}
int ZEXPORT inflateReset(z_streamp strm) {
Log(LogLevel::LOG_INFO, "inflateReset Line %d, strm %p\n", __LINE__, strm);
InflateSettings* inflate_settings = inflate_stream_settings.Get(strm);
if (inflate_settings != nullptr) {
inflate_settings->path = UNDEFINED;
}
return orig_inflateReset(strm);
}
int ZEXPORT compress2(Bytef* dest, uLongf* destLen, const Bytef* source,
uLong sourceLen, int level) {
Log(LogLevel::LOG_INFO, "compress2 Line %d, sourceLen %lu, destLen %lu\n",
__LINE__, sourceLen, *destLen);
int ret = 1;
uint32_t input_len = sourceLen;
(void)input_len;
uint32_t output_len = *destLen;
bool iaa_available = false;
bool qat_available = false;
#ifdef USE_IAA
iaa_available = config::use_iaa_compress &&
SupportedOptionsIAA(15, input_len, output_len);
#endif
#ifdef USE_QAT
qat_available =
config::use_qat_compress && SupportedOptionsQAT(15, input_len);
#endif
ExecutionPath path_selected = ZLIB;
if (iaa_available) {
path_selected = IAA;
} else if (qat_available) {
path_selected = QAT;
}
if (path_selected == IAA) {
#ifdef USE_IAA
in_call = true;
ret = CompressIAA(const_cast<uint8_t*>(source), &input_len, dest,
&output_len, qpl_path_hardware, 15);
in_call = false;
#endif // USE_IAA
} else if (path_selected == QAT) {
#ifdef USE_QAT
in_call = true;
ret = CompressQAT(const_cast<uint8_t*>(source), &input_len, dest,
&output_len, 15);
in_call = false;
#endif // USE_QAT
}
if (ret == 0) {
*destLen = output_len;
ret = Z_OK;
Log(LogLevel::LOG_INFO,
"compress2 Line %d, accelerator return code %d, sourceLen %lu, "
"destLen %lu\n",
__LINE__, ret, sourceLen, *destLen);
} else if (config::use_zlib_compress) {
// compress2 in zlib calls deflate. It was observed that deflate is
// sometimes intercepted by the shim. in_call prevents deflate from using
// accelerators.
in_call = true;
ret = orig_compress2(dest, destLen, source, sourceLen, level);
in_call = false;
Log(LogLevel::LOG_INFO,
"compress2 Line %d, zlib return code %d, sourceLen %lu, "
"destLen %lu\n",
__LINE__, ret, sourceLen, *destLen);
} else {
ret = Z_DATA_ERROR;
}
return ret;
}
int ZEXPORT compress(Bytef* dest, uLongf* destLen, const Bytef* source,
uLong sourceLen) {
return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
}
int ZEXPORT uncompress2(Bytef* dest, uLongf* destLen, const Bytef* source,
uLong* sourceLen) {
Log(LogLevel::LOG_INFO, "uncompress2 Line %d, sourceLen %lu, destLen %lu\n",
__LINE__, *sourceLen, *destLen);
int ret = 1;
bool end_of_stream = true;
(void)end_of_stream;
uint32_t input_len = *sourceLen;
uint32_t output_len = *destLen;
bool iaa_available = false;
bool qat_available = false;
#ifdef USE_IAA
iaa_available =
config::use_iaa_uncompress &&
SupportedOptionsIAA(15, input_len, output_len) &&
IsIAADecompressible(const_cast<uint8_t*>(source), input_len, 15);
#endif
#ifdef USE_QAT
qat_available =
config::use_qat_uncompress && SupportedOptionsQAT(15, input_len);
#endif
ExecutionPath path_selected = ZLIB;
if (iaa_available) {
path_selected = IAA;
} else if (qat_available) {
path_selected = QAT;
}
if (path_selected == IAA) {
#ifdef USE_IAA
in_call = true;
ret = UncompressIAA(const_cast<uint8_t*>(source), &input_len, dest,
&output_len, qpl_path_hardware, 15, &end_of_stream);
in_call = false;
#endif // USE_IAA
} else if (path_selected == QAT) {
#ifdef USE_QAT
in_call = true;
ret = UncompressQAT(const_cast<uint8_t*>(source), &input_len, dest,
&output_len, 15, &end_of_stream);
in_call = false;
#endif // USE_QAT
}
if (ret == 0) {
*sourceLen = input_len;
*destLen = output_len;
ret = Z_OK;
Log(LogLevel::LOG_INFO,
"uncompress2 Line %d, accelerator return code %d, sourceLen %lu, "
"destLen %lu\n",
__LINE__, ret, *sourceLen, *destLen);
} else if (config::use_zlib_uncompress) {
// refer to comment in compress2
in_call = true;
ret = orig_uncompress2(dest, destLen, source, sourceLen);
in_call = false;
Log(LogLevel::LOG_INFO,
"uncompress2 Line %d, zlib return code %d, sourceLen %lu, "
"destLen %lu\n",
__LINE__, ret, *sourceLen, *destLen);
} else {
ret = Z_DATA_ERROR;
}
return ret;
}
int ZEXPORT uncompress(Bytef* dest, uLongf* destLen, const Bytef* source,
uLong sourceLen) {
uLong srcLen = sourceLen;
return uncompress2(dest, destLen, source, &srcLen);
}
ExecutionPath GetDeflateExecutionPath(z_streamp strm) {
DeflateSettings* deflate_settings = deflate_stream_settings.Get(strm);
return deflate_settings->path;
}
ExecutionPath GetInflateExecutionPath(z_streamp strm) {
InflateSettings* inflate_settings = inflate_stream_settings.Get(strm);
return inflate_settings->path;
}
enum class FileMode { NONE, READ, WRITE, APPEND };
struct GzipFile {
GzipFile() { Reset(); }
GzipFile(int _fd, FileMode file_mode) : fd(_fd), mode(file_mode) { Reset(); }
~GzipFile() {
if (data_buf != nullptr) {
delete[] data_buf;
}
if (io_buf != nullptr) {
delete[] io_buf;
}
orig_deflateEnd(&deflate_stream);
orig_inflateEnd(&inflate_stream);
}
void Reset() {
fd = 0;
path = UNDEFINED;
use_zlib_for_decompression = false;
reached_eof = false;
mode = FileMode::NONE;
data_buf_pos = 0;
data_buf_content = 0;
io_buf_pos = 0;
io_buf_content = 0;
memset(&deflate_stream, 0, sizeof(z_stream));
orig_deflateInit2_(&deflate_stream, -1, Z_DEFLATED, 31, 8,
Z_DEFAULT_STRATEGY, ZLIB_VERSION, (int)sizeof(z_stream));
memset(&inflate_stream, 0, sizeof(z_stream));
orig_inflateInit2_(&inflate_stream, 31, ZLIB_VERSION,
(int)sizeof(z_stream));
}
void AllocateBuffers() {
if (data_buf == nullptr) {
data_buf = new char[alloc_size];
data_buf_pos = 0;
data_buf_content = 0;
}
if (io_buf == nullptr) {
io_buf = new char[alloc_size];
io_buf_pos = 0;
io_buf_content = 0;
}
}
int fd = 0;
ExecutionPath path = UNDEFINED;
// If falling back to zlib at some point, all data from there forward must be
// decompressed with zlib
bool use_zlib_for_decompression = false;
bool reached_eof = false;
FileMode mode = FileMode::NONE;
// For gzwrite
// data_buf --(compress)--> io_buf --(write)--> file
// - buffer input data into data_buf
// - once size reached, compress the data into io_buf
// - write io_buf to file
// For gzread
// file --(read)--> io_buf --(uncompress)--> data_buf
// - read file data into io_buf
// - decompress data into data_buf
// - serve data from data_buf when requested
char* data_buf = nullptr;
int data_buf_size = 0;
int data_buf_pos = 0;
int data_buf_content = 0;
char* io_buf = nullptr;
int io_buf_size = 0;
int io_buf_pos = 0;
int io_buf_content = 0;
const int alloc_size = 512 << 10;
// Stream to use zlib in case of accelerator errors
z_stream deflate_stream;
z_stream inflate_stream;
};
class GzipFiles {
public:
void Set(gzFile file, int fd, FileMode file_mode) {
if (use_thread_local) {
gzip_file.Reset();
gzip_file.fd = fd;
gzip_file.mode = file_mode;
} else {
GzipFile* f = new GzipFile(fd, file_mode);
map.Set(file, f);
}
}
void Unset(gzFile file) {
if (use_thread_local) {
gzip_file.Reset();
} else {
map.Unset(file);
}
}
GzipFile* Get(gzFile file) {
if (use_thread_local) {
return &gzip_file;
} else {
return map.Get(file);
}
}
private:
ShardedMap<gzFile, GzipFile*> map;
static thread_local GzipFile gzip_file;
bool use_thread_local = true;
};
GzipFiles gzip_files;
thread_local GzipFile GzipFiles::gzip_file;
// Inspired by gz_open in gzlib.c
int GetOpenFlags(const char* mode, FileMode* file_mode) {
bool cloexec = false;
bool exclusive = false;
while (*mode) {
// TODO not all modes covered. Verify if any more to add.
switch (*mode) {
case 'r':
*file_mode = FileMode::READ;
break;
case 'w':
*file_mode = FileMode::WRITE;
break;
case 'a':
*file_mode = FileMode::APPEND;
break;
case 'b':
break;
#ifdef O_CLOEXEC
case 'e':
cloexec = true;
break;
#endif
#ifdef O_EXCL
case 'x':
exclusive = true;
break;
#endif
default:;
}
mode++;
}
/* compute the flags for open() */
int oflag = 0;
oflag =
#ifdef O_LARGEFILE
O_LARGEFILE |
#endif
#ifdef O_BINARY
O_BINARY |
#endif
#ifdef O_CLOEXEC
(cloexec ? O_CLOEXEC : 0) |
#endif
(*file_mode == FileMode::READ
? O_RDONLY
: (O_WRONLY | O_CREAT |
#ifdef O_EXCL
(exclusive ? O_EXCL : 0) |
#endif
(*file_mode == FileMode::WRITE ? O_TRUNC : O_APPEND)));
return oflag;
}
gzFile ZEXPORT gzopen(const char* path, const char* mode) {
// We need to store the file descriptor for use in other functions.
// Open the file here and then call gzdopen
FileMode file_mode = FileMode::NONE;
int oflag = GetOpenFlags(mode, &file_mode);
int fd = open((const char*)path, oflag, 0666);
gzFile file = orig_gzdopen(fd, mode);
// TODO in case of error fall back to zlib and set execution path.
Log(LogLevel::LOG_INFO, "gzopen Line %d, file %p, path %s, mode %s\n",
__LINE__, file, path, mode);
gzip_files.Set(file, fd, file_mode);
return file;
}
gzFile ZEXPORT gzdopen(int fd, const char* mode) {
gzFile file = orig_gzdopen(fd, mode);
Log(LogLevel::LOG_INFO, "gzdopen Line %d, file %d, fd %p, mode %s\n",
__LINE__, fd, file, mode);
FileMode file_mode = FileMode::NONE;
GetOpenFlags(mode, &file_mode);
gzip_files.Set(file, fd, file_mode);
return file;
}
static int GzwriteAcceleratorCompress(GzipFile* gz, uint8_t* input,
uint32_t* input_length, uint8_t* output,
uint32_t* output_length) {
(void)gz;
(void)input;
(void)input_length;
(void)output;
(void)output_length;
int ret = 1;
bool iaa_available = false;
bool qat_available = false;
#ifdef USE_IAA
iaa_available = config::use_iaa_compress &&
SupportedOptionsIAA(31, *input_length, *output_length);
#endif
#ifdef USE_QAT
qat_available =
config::use_qat_compress && SupportedOptionsQAT(31, *input_length);
#endif
ExecutionPath path_selected = ZLIB;
if (qat_available) {
path_selected = QAT;
} else if (iaa_available) {
path_selected = IAA;
}
if (path_selected == IAA) {
#ifdef USE_IAA
in_call = true;
ret = CompressIAA(input, input_length, output, output_length,
qpl_path_hardware, 31, true);
gz->path = IAA;
in_call = false;
#endif // USE_IAA
} else if (path_selected == QAT) {
#ifdef USE_QAT
in_call = true;
ret = CompressQAT(input, input_length, output, output_length, 31, true);
gz->path = QAT;
in_call = false;
#endif // USE_QAT
}
return ret;
}
static int GzreadAcceleratorUncompress(GzipFile* gz, uint8_t* input,
uint32_t* input_length, uint8_t* output,
uint32_t* output_length,
bool* end_of_stream) {
(void)gz;
(void)input;
(void)input_length;
(void)output;
(void)output_length;
(void)end_of_stream;
int ret = 1;
bool iaa_available = false;
bool qat_available = false;
#ifdef USE_IAA
iaa_available = config::use_iaa_uncompress &&
SupportedOptionsIAA(31, *input_length, *output_length) &&
IsIAADecompressible(input, *input_length, 31);
#endif
#ifdef USE_QAT
qat_available =
config::use_qat_uncompress && SupportedOptionsQAT(31, *input_length);
#endif
ExecutionPath path_selected = ZLIB;
if (qat_available) {
path_selected = QAT;
} else if (iaa_available) {
path_selected = IAA;
}
if (path_selected == IAA) {
#ifdef USE_IAA
in_call = true;
ret = UncompressIAA(input, input_length, output, output_length,
qpl_path_hardware, 31, end_of_stream, true);
gz->path = IAA;
in_call = false;
#endif // USE_IAA
} else if (path_selected == QAT) {
#ifdef USE_QAT
in_call = true;
ret = UncompressQAT(input, input_length, output, output_length, 31,
end_of_stream, true);
gz->path = QAT;
in_call = false;
#endif // USE_QAT
}
return ret;
}
static int GzwriteZlibCompress(gzFile file, voidpc buf, unsigned len) {
int ret = 0;
if (config::use_zlib_compress) {
ret = orig_gzwrite(file, buf, len);
} else {
ret = 0;
}
return ret;
}
static int GzreadZlibUncompress(gzFile file, voidp buf, unsigned len) {
int ret = 0;
if (config::use_zlib_uncompress) {
ret = orig_gzread(file, buf, len);
} else {
ret = -1;
}
return ret;
}
static int CompressAndWrite(gzFile file, GzipFile* gz) {
(void)file;
uint32_t input_len = gz->data_buf_content;
uint8_t* input = reinterpret_cast<uint8_t*>(gz->data_buf);
uint32_t output_len = gz->io_buf_size;
uint8_t* output = reinterpret_cast<uint8_t*>(gz->io_buf);
// TODO loop in case not all data compressed
int ret =
GzwriteAcceleratorCompress(gz, input, &input_len, output, &output_len);
Log(LogLevel::LOG_INFO,
"CompressAndWrite Line %d, file %p, accelerator return code %d, input "
"%d, "
"output %d\n",
__LINE__, file, ret, input_len, output_len);
if (ret == 0) {
gz->data_buf_pos = input_len;
} else {
gz->deflate_stream.next_in = (Bytef*)(gz->data_buf);
gz->deflate_stream.avail_in =
static_cast<unsigned int>(gz->data_buf_content);
gz->deflate_stream.next_out = (Bytef*)(gz->io_buf);
gz->deflate_stream.avail_out = static_cast<unsigned int>(gz->io_buf_size);
ret = orig_deflate(&gz->deflate_stream, Z_FINISH);
Log(LogLevel::LOG_INFO,
"CompressAndWrite Line %d, file %p, zlib return code %d, input %d, "