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s3fs-fuse/src/curl_multi.cpp

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/*
* s3fs - FUSE-based file system backed by Amazon S3
*
* Copyright(C) 2007 Randy Rizun <rrizun@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <cstdio>
#include <cstdlib>
#include <cerrno>
#include <vector>
#include "s3fs.h"
#include "s3fs_logger.h"
#include "curl_multi.h"
#include "curl.h"
#include "autolock.h"
#include "psemaphore.h"
//-------------------------------------------------------------------
// Class S3fsMultiCurl
//-------------------------------------------------------------------
S3fsMultiCurl::S3fsMultiCurl(int maxParallelism, bool not_abort) : maxParallelism(maxParallelism), not_abort(not_abort), SuccessCallback(nullptr), NotFoundCallback(nullptr), RetryCallback(nullptr), pSuccessCallbackParam(nullptr), pNotFoundCallbackParam(nullptr)
{
int result;
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
#if S3FS_PTHREAD_ERRORCHECK
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
#endif
if (0 != (result = pthread_mutex_init(&completed_tids_lock, &attr))) {
S3FS_PRN_ERR("could not initialize completed_tids_lock: %i", result);
abort();
}
}
S3fsMultiCurl::~S3fsMultiCurl()
{
Clear();
int result;
if(0 != (result = pthread_mutex_destroy(&completed_tids_lock))){
S3FS_PRN_ERR("could not destroy completed_tids_lock: %i", result);
}
}
bool S3fsMultiCurl::ClearEx(bool is_all)
{
s3fscurllist_t::iterator iter;
for(iter = clist_req.begin(); iter != clist_req.end(); ++iter){
S3fsCurl* s3fscurl = iter->get();
if(s3fscurl){
s3fscurl->DestroyCurlHandle();
}
}
clist_req.clear();
if(is_all){
for(iter = clist_all.begin(); iter != clist_all.end(); ++iter){
S3fsCurl* s3fscurl = iter->get();
s3fscurl->DestroyCurlHandle();
}
clist_all.clear();
}
S3FS_MALLOCTRIM(0);
return true;
}
S3fsMultiSuccessCallback S3fsMultiCurl::SetSuccessCallback(S3fsMultiSuccessCallback function)
{
S3fsMultiSuccessCallback old = SuccessCallback;
SuccessCallback = function;
return old;
}
S3fsMultiNotFoundCallback S3fsMultiCurl::SetNotFoundCallback(S3fsMultiNotFoundCallback function)
{
S3fsMultiNotFoundCallback old = NotFoundCallback;
NotFoundCallback = function;
return old;
}
S3fsMultiRetryCallback S3fsMultiCurl::SetRetryCallback(S3fsMultiRetryCallback function)
{
S3fsMultiRetryCallback old = RetryCallback;
RetryCallback = function;
return old;
}
void* S3fsMultiCurl::SetSuccessCallbackParam(void* param)
{
void* old = pSuccessCallbackParam;
pSuccessCallbackParam = param;
return old;
}
void* S3fsMultiCurl::SetNotFoundCallbackParam(void* param)
{
void* old = pNotFoundCallbackParam;
pNotFoundCallbackParam = param;
return old;
}
bool S3fsMultiCurl::SetS3fsCurlObject(std::unique_ptr<S3fsCurl> s3fscurl)
{
if(!s3fscurl){
return false;
}
clist_all.push_back(std::move(s3fscurl));
return true;
}
int S3fsMultiCurl::MultiPerform()
{
std::vector<pthread_t> threads;
bool success = true;
bool isMultiHead = false;
Semaphore sem(GetMaxParallelism());
int rc;
for(s3fscurllist_t::iterator iter = clist_req.begin(); iter != clist_req.end(); ++iter) {
pthread_t thread;
S3fsCurl* s3fscurl = iter->get();
if(!s3fscurl){
continue;
}
sem.wait();
{
AutoLock lock(&completed_tids_lock);
for(std::vector<pthread_t>::iterator it = completed_tids.begin(); it != completed_tids.end(); ++it){
void* retval;
rc = pthread_join(*it, &retval);
if (rc) {
success = false;
S3FS_PRN_ERR("failed pthread_join - rc(%d) %s", rc, strerror(rc));
} else {
long int_retval = reinterpret_cast<long>(retval);
if (int_retval && !(int_retval == -ENOENT && isMultiHead)) {
S3FS_PRN_WARN("thread terminated with non-zero return code: %ld", int_retval);
}
}
}
completed_tids.clear();
}
s3fscurl->sem = &sem;
s3fscurl->completed_tids_lock = &completed_tids_lock;
s3fscurl->completed_tids = &completed_tids;
isMultiHead |= s3fscurl->GetOp() == "HEAD";
rc = pthread_create(&thread, nullptr, S3fsMultiCurl::RequestPerformWrapper, static_cast<void*>(s3fscurl));
if (rc != 0) {
success = false;
S3FS_PRN_ERR("failed pthread_create - rc(%d)", rc);
break;
}
threads.push_back(thread);
}
for(int i = 0; i < sem.get_value(); ++i){
sem.wait();
}
AutoLock lock(&completed_tids_lock);
for (std::vector<pthread_t>::iterator titer = completed_tids.begin(); titer != completed_tids.end(); ++titer) {
void* retval;
rc = pthread_join(*titer, &retval);
if (rc) {
success = false;
S3FS_PRN_ERR("failed pthread_join - rc(%d)", rc);
} else {
long int_retval = reinterpret_cast<long>(retval);
if (int_retval && !(int_retval == -ENOENT && isMultiHead)) {
S3FS_PRN_WARN("thread terminated with non-zero return code: %ld", int_retval);
}
}
}
completed_tids.clear();
return success ? 0 : -EIO;
}
int S3fsMultiCurl::MultiRead()
{
int result = 0;
for(s3fscurllist_t::iterator iter = clist_req.begin(); iter != clist_req.end(); ){
std::unique_ptr<S3fsCurl> s3fscurl(std::move(*iter));
bool isRetry = false;
bool isPostpone = false;
bool isNeedResetOffset = true;
long responseCode = S3fsCurl::S3FSCURL_RESPONSECODE_NOTSET;
CURLcode curlCode = s3fscurl->GetCurlCode();
if(s3fscurl->GetResponseCode(responseCode, false) && curlCode == CURLE_OK){
if(S3fsCurl::S3FSCURL_RESPONSECODE_NOTSET == responseCode){
// This is a case where the processing result has not yet been updated (should be very rare).
isPostpone = true;
}else if(400 > responseCode){
// add into stat cache
// cppcheck-suppress unmatchedSuppression
// cppcheck-suppress knownPointerToBool
if(SuccessCallback && !SuccessCallback(s3fscurl.get(), pSuccessCallbackParam)){
S3FS_PRN_WARN("error from success callback function(%s).", s3fscurl->url.c_str());
}
}else if(400 == responseCode){
// as possibly in multipart
S3FS_PRN_WARN("failed a request(%ld: %s)", responseCode, s3fscurl->url.c_str());
isRetry = true;
}else if(404 == responseCode){
// not found
// HEAD requests on readdir_multi_head can return 404
if(s3fscurl->GetOp() != "HEAD"){
S3FS_PRN_WARN("failed a request(%ld: %s)", responseCode, s3fscurl->url.c_str());
}
// Call callback function
// cppcheck-suppress unmatchedSuppression
// cppcheck-suppress knownPointerToBool
if(NotFoundCallback && !NotFoundCallback(s3fscurl.get(), pNotFoundCallbackParam)){
S3FS_PRN_WARN("error from not found callback function(%s).", s3fscurl->url.c_str());
}
}else if(500 == responseCode){
// case of all other result, do retry.(11/13/2013)
// because it was found that s3fs got 500 error from S3, but could success
// to retry it.
S3FS_PRN_WARN("failed a request(%ld: %s)", responseCode, s3fscurl->url.c_str());
isRetry = true;
}else{
// Retry in other case.
S3FS_PRN_WARN("failed a request(%ld: %s)", responseCode, s3fscurl->url.c_str());
isRetry = true;
}
}else{
S3FS_PRN_ERR("failed a request(Unknown response code: %s)", s3fscurl->url.c_str());
// Reuse partical file
switch(curlCode){
case CURLE_OPERATION_TIMEDOUT:
isRetry = true;
isNeedResetOffset = false;
break;
case CURLE_PARTIAL_FILE:
isRetry = true;
isNeedResetOffset = false;
break;
default:
S3FS_PRN_ERR("###curlCode: %d msg: %s", curlCode, curl_easy_strerror(curlCode));
isRetry = true;
break;
}
}
if(isPostpone){
clist_req.erase(iter);
clist_req.push_back(std::move(s3fscurl)); // Re-evaluate at the end
iter = clist_req.begin();
}else{
if(!isRetry || (!not_abort && 0 != result)){
// If an EIO error has already occurred, it will be terminated
// immediately even if retry processing is required.
s3fscurl->DestroyCurlHandle();
}else{
// Reset offset
if(isNeedResetOffset){
S3fsCurl::ResetOffset(s3fscurl.get());
}
// For retry
std::unique_ptr<S3fsCurl> retrycurl;
const S3fsCurl* retrycurl_ptr = retrycurl.get(); // save this due to std::move below
if(RetryCallback){
retrycurl = RetryCallback(s3fscurl.get());
if(nullptr != retrycurl){
clist_all.push_back(std::move(retrycurl));
}else{
// set EIO and wait for other parts.
result = -EIO;
}
}
// cppcheck-suppress mismatchingContainers
if(s3fscurl.get() != retrycurl_ptr){
s3fscurl->DestroyCurlHandle();
}
}
iter = clist_req.erase(iter);
}
}
clist_req.clear();
if(!not_abort && 0 != result){
// If an EIO error has already occurred, clear all retry objects.
for(s3fscurllist_t::iterator iter = clist_all.begin(); iter != clist_all.end(); ++iter){
S3fsCurl* s3fscurl = iter->get();
s3fscurl->DestroyCurlHandle();
}
clist_all.clear();
}
return result;
}
int S3fsMultiCurl::Request()
{
S3FS_PRN_INFO3("[count=%zu]", clist_all.size());
// Make request list.
//
// Send multi request loop( with retry )
// (When many request is sends, sometimes gets "Couldn't connect to server")
//
while(!clist_all.empty()){
// set curl handle to multi handle
int result;
s3fscurllist_t::iterator iter;
for(iter = clist_all.begin(); iter != clist_all.end(); ++iter){
clist_req.push_back(std::move(*iter));
}
clist_all.clear();
// Send multi request.
if(0 != (result = MultiPerform())){
Clear();
return result;
}
// Read the result
if(0 != (result = MultiRead())){
Clear();
return result;
}
// Cleanup curl handle in multi handle
ClearEx(false);
}
return 0;
}
//
// thread function for performing an S3fsCurl request
//
void* S3fsMultiCurl::RequestPerformWrapper(void* arg)
{
S3fsCurl* s3fscurl= static_cast<S3fsCurl*>(arg);
void* result = nullptr;
if(!s3fscurl){
return reinterpret_cast<void*>(static_cast<intptr_t>(-EIO));
}
if(s3fscurl->fpLazySetup){
if(!s3fscurl->fpLazySetup(s3fscurl)){
S3FS_PRN_ERR("Failed to lazy setup, then respond EIO.");
result = reinterpret_cast<void*>(static_cast<intptr_t>(-EIO));
}
}
if(!result){
result = reinterpret_cast<void*>(static_cast<intptr_t>(s3fscurl->RequestPerform()));
s3fscurl->DestroyCurlHandle(true, false);
}
AutoLock lock(s3fscurl->completed_tids_lock);
s3fscurl->completed_tids->push_back(pthread_self());
s3fscurl->sem->post();
return result;
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: expandtab sw=4 ts=4 fdm=marker
* vim<600: expandtab sw=4 ts=4
*/
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