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Added a class for automating fdentity reference counts

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This commit is contained in:
Takeshi Nakatani 2020-09-13 07:49:25 +00:00 committed by Andrew Gaul
parent 8205607716
commit 3958450c05
7 changed files with 373 additions and 162 deletions
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1
src/Makefile.am
View File

@ -46,6 +46,7 @@ s3fs_SOURCES = \
fdcache_entity.cpp \
fdcache_page.cpp \
fdcache_stat.cpp \
fdcache_auto.cpp \
addhead.cpp \
sighandlers.cpp \
autolock.cpp \

7
src/fdcache.cpp
View File

@ -378,6 +378,7 @@ FdManager::~FdManager()
if(this == FdManager::get()){
for(fdent_map_t::iterator iter = fent.begin(); fent.end() != iter; ++iter){
FdEntity* ent = (*iter).second;
S3FS_PRN_WARN("To exit with the cache file opened: path=%s, refcnt=%d", ent->GetPath(), ent->GetRefCnt());
delete ent;
}
fent.clear();
@ -403,7 +404,7 @@ FdManager::~FdManager()
}
}
FdEntity* FdManager::GetFdEntity(const char* path, int existfd)
FdEntity* FdManager::GetFdEntity(const char* path, int existfd, bool increase_ref)
{
S3FS_PRN_INFO3("[path=%s][fd=%d]", SAFESTRPTR(path), existfd);
@ -414,7 +415,9 @@ FdEntity* FdManager::GetFdEntity(const char* path, int existfd)
fdent_map_t::iterator iter = fent.find(std::string(path));
if(fent.end() != iter && (-1 == existfd || (*iter).second->GetFd() == existfd)){
if(increase_ref){
iter->second->Dup();
}
return (*iter).second;
}
@ -423,7 +426,9 @@ FdEntity* FdManager::GetFdEntity(const char* path, int existfd)
if((*iter).second && (*iter).second->GetFd() == existfd){
// found opened fd in map
if(0 == strcmp((*iter).second->GetPath(), path)){
if(increase_ref){
iter->second->Dup();
}
return (*iter).second;
}
// found fd, but it is used another file(file descriptor is recycled)

2
src/fdcache.h
View File

@ -76,7 +76,7 @@ class FdManager
static bool HaveLseekHole(void);
// Return FdEntity associated with path, returning NULL on error. This operation increments the reference count; callers must decrement via Close after use.
FdEntity* GetFdEntity(const char* path, int existfd = -1);
FdEntity* GetFdEntity(const char* path, int existfd = -1, bool increase_ref = true);
FdEntity* Open(const char* path, headers_t* pmeta = NULL, off_t size = -1, time_t time = -1, bool force_tmpfile = false, bool is_create = true, bool no_fd_lock_wait = false);
FdEntity* ExistOpen(const char* path, int existfd = -1, bool ignore_existfd = false);
void Rename(const std::string &from, const std::string &to);

144
src/fdcache_auto.cpp Normal file
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@ -0,0 +1,144 @@
/*
* s3fs - FUSE-based file system backed by Amazon S3
*
* Copyright(C) 2007 Takeshi Nakatani <ggtakec.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 "common.h"
#include "s3fs.h"
#include "fdcache_auto.h"
#include "fdcache.h"
//------------------------------------------------
// AutoFdEntity methods
//------------------------------------------------
AutoFdEntity::AutoFdEntity() : pFdEntity(NULL)
{
}
// [NOTE]
// The copy constructor should not be called, then this is private method.
// Even if it is called, the consistency of the number of
// references can be maintained, but this case is not assumed.
//
AutoFdEntity::AutoFdEntity(AutoFdEntity& other) : pFdEntity(NULL)
{
S3FS_PRN_WARN("This method should not be called. Please check the caller.");
if(other.pFdEntity){
other.pFdEntity->Dup();
pFdEntity = other.pFdEntity;
}
}
AutoFdEntity::~AutoFdEntity()
{
Close();
}
bool AutoFdEntity::Close()
{
if(pFdEntity){
if(!FdManager::get()->Close(pFdEntity)){
S3FS_PRN_ERR("Failed to close fdentity.");
return false;
}
pFdEntity = NULL;
}
return true;
}
// [NOTE]
// This method touches the internal fdentity with.
// This is used to keep the file open.
//
bool AutoFdEntity::Detach()
{
if(!pFdEntity){
S3FS_PRN_ERR("Does not have a associated FdEntity.");
return false;
}
pFdEntity = NULL;
return true;
}
// [NOTE]
// This method calls the FdManager method without incrementing the
// reference count.
// This means that it will only be used to map to a file descriptor
// that was already open.
//
FdEntity* AutoFdEntity::GetFdEntity(const char* path, int existfd, bool increase_ref)
{
Close();
if(NULL == (pFdEntity = FdManager::get()->GetFdEntity(path, existfd, increase_ref))){
S3FS_PRN_ERR("Could not find fd(file=%s, existfd=%d)", path, existfd);
return NULL;
}
return pFdEntity;
}
FdEntity* AutoFdEntity::Open(const char* path, headers_t* pmeta, off_t size, time_t time, bool force_tmpfile, bool is_create, bool no_fd_lock_wait)
{
Close();
if(NULL == (pFdEntity = FdManager::get()->Open(path, pmeta, size, time, force_tmpfile, is_create, no_fd_lock_wait))){
return NULL;
}
return pFdEntity;
}
FdEntity* AutoFdEntity::ExistOpen(const char* path, int existfd, bool ignore_existfd)
{
Close();
if(NULL == (pFdEntity = FdManager::get()->ExistOpen(path, existfd, ignore_existfd))){
return NULL;
}
return pFdEntity;
}
// [NOTE]
// This operator should not be called, then this is private method.
// Even if it is called, the consistency of the number of
// references can be maintained, but this case is not assumed.
//
bool AutoFdEntity::operator=(AutoFdEntity& other)
{
S3FS_PRN_WARN("This method should not be called. Please check the caller.");
Close();
if(other.pFdEntity){
other.pFdEntity->Dup();
pFdEntity = other.pFdEntity;
}
return true;
}
/*
* 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
*/

63
src/fdcache_auto.h Normal file
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@ -0,0 +1,63 @@
/*
* 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.
*/
#ifndef S3FS_FDCACHE_AUTO_H_
#define S3FS_FDCACHE_AUTO_H_
#include "fdcache_entity.h"
//------------------------------------------------
// class AutoFdEntity
//------------------------------------------------
// A class that opens fdentiry and closes it automatically.
// This class object is used to prevent inconsistencies in
// the number of references in fdentiry.
// The methods are wrappers to the method of the FdManager class.
//
class AutoFdEntity
{
private:
FdEntity* pFdEntity;
private:
AutoFdEntity(AutoFdEntity& other);
bool operator=(AutoFdEntity& other);
public:
AutoFdEntity();
~AutoFdEntity();
bool Close(void);
bool Detach(void);
FdEntity* GetFdEntity(const char* path, int existfd = -1, bool increase_ref = true);
FdEntity* Open(const char* path, headers_t* pmeta = NULL, off_t size = -1, time_t time = -1, bool force_tmpfile = false, bool is_create = true, bool no_fd_lock_wait = false);
FdEntity* ExistOpen(const char* path, int existfd = -1, bool ignore_existfd = false);
};
#endif // S3FS_FDCACHE_AUTO_H_
/*
* 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
*/

1
src/fdcache_entity.h
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@ -75,6 +75,7 @@ class FdEntity
int Open(headers_t* pmeta = NULL, off_t size = -1, time_t time = -1, bool no_fd_lock_wait = false);
bool OpenAndLoadAll(headers_t* pmeta = NULL, off_t* size = NULL, bool force_load = false);
int Dup(bool lock_already_held = false);
int GetRefCnt(void) const { return refcnt; } // [NOTE] Use only debugging
const char* GetPath(void) const { return path.c_str(); }
bool RenamePath(const std::string& newpath, std::string& fentmapkey);

163
src/s3fs.cpp
View File

@ -32,6 +32,7 @@
#include "s3fs.h"
#include "metaheader.h"
#include "fdcache.h"
#include "fdcache_auto.h"
#include "curl.h"
#include "curl_multi.h"
#include "s3objlist.h"
@ -116,7 +117,7 @@ static int get_object_attribute(const char* path, struct stat* pstbuf, headers_t
static int check_object_access(const char* path, int mask, struct stat* pstbuf);
static int check_object_owner(const char* path, struct stat* pstbuf);
static int check_parent_object_access(const char* path, int mask);
static FdEntity* get_local_fent(const char* path, bool is_load = false);
static FdEntity* get_local_fent(AutoFdEntity& autoent, const char* path, bool is_load = false);
static bool multi_head_callback(S3fsCurl* s3fscurl);
static S3fsCurl* multi_head_retry_callback(S3fsCurl* s3fscurl);
static int readdir_multi_head(const char* path, const S3ObjList& head, void* buf, fuse_fill_dir_t filler);
@ -674,7 +675,7 @@ bool get_object_sse_type(const char* path, sse_type_t& ssetype, std::string& sse
return true;
}
static FdEntity* get_local_fent(const char* path, bool is_load)
static FdEntity* get_local_fent(AutoFdEntity& autoent, const char* path, bool is_load)
{
struct stat stobj;
FdEntity* ent;
@ -690,14 +691,14 @@ static FdEntity* get_local_fent(const char* path, bool is_load)
time_t mtime = (!S_ISREG(stobj.st_mode) || S_ISLNK(stobj.st_mode)) ? -1 : stobj.st_mtime;
bool force_tmpfile = S_ISREG(stobj.st_mode) ? false : true;
if(NULL == (ent = FdManager::get()->Open(path, &meta, stobj.st_size, mtime, force_tmpfile, true))){
if(NULL == (ent = autoent.Open(path, &meta, stobj.st_size, mtime, force_tmpfile, true))){
S3FS_PRN_ERR("Could not open file. errno(%d)", errno);
return NULL;
}
// load
if(is_load && !ent->OpenAndLoadAll(&meta)){
S3FS_PRN_ERR("Could not load file. errno(%d)", errno);
FdManager::get()->Close(ent);
autoent.Close();
return NULL;
}
return ent;
@ -739,18 +740,18 @@ int put_headers(const char* path, headers_t& meta, bool is_copy)
// if path is 'dir/', it does not have cache(could not open file for directory stat)
//
if('/' != path[strlen(path) - 1]){
FdEntity* ent = NULL;
if(NULL == (ent = FdManager::get()->ExistOpen(path, -1, !FdManager::IsCacheDir()))){
AutoFdEntity autoent;
FdEntity* ent;
if(NULL == (ent = autoent.ExistOpen(path, -1, !FdManager::IsCacheDir()))){
// no opened fd
if(FdManager::IsCacheDir()){
// create cache file if be needed
ent = FdManager::get()->Open(path, &meta, buf.st_size, -1, false, true);
ent = autoent.Open(path, &meta, buf.st_size, -1, false, true);
}
}
if(ent){
time_t mtime = get_mtime(meta);
ent->SetMtime(mtime);
FdManager::get()->Close(ent);
}
}
return 0;
@ -773,14 +774,13 @@ static int s3fs_getattr(const char* _path, struct stat* stbuf)
// If has already opened fd, the st_size should be instead.
// (See: Issue 241)
if(stbuf){
AutoFdEntity autoent;
FdEntity* ent;
if(NULL != (ent = FdManager::get()->ExistOpen(path))){
if(NULL != (ent = autoent.ExistOpen(path))){
struct stat tmpstbuf;
if(ent->GetStats(tmpstbuf)){
stbuf->st_size = tmpstbuf.st_size;
}
FdManager::get()->Close(ent);
}
stbuf->st_blksize = 4096;
stbuf->st_blocks = get_blocks(stbuf->st_size);
@ -803,8 +803,10 @@ static int s3fs_readlink(const char* _path, char* buf, size_t size)
// check symblic link cache
if(!StatCache::getStatCacheData()->GetSymlink(std::string(path), strValue)){
// not found in cache, then open the path
{ // scope for AutoFdEntity
AutoFdEntity autoent;
FdEntity* ent;
if(NULL == (ent = get_local_fent(path))){
if(NULL == (ent = get_local_fent(autoent, path))){
S3FS_PRN_ERR("could not get fent(file=%s)", path);
return -EIO;
}
@ -812,7 +814,6 @@ static int s3fs_readlink(const char* _path, char* buf, size_t size)
off_t readsize;
if(!ent->GetSize(readsize)){
S3FS_PRN_ERR("could not get file size(file=%s)", path);
FdManager::get()->Close(ent);
return -EIO;
}
if(static_cast<off_t>(size) <= readsize){
@ -822,13 +823,10 @@ static int s3fs_readlink(const char* _path, char* buf, size_t size)
ssize_t ressize;
if(0 > (ressize = ent->Read(buf, 0, readsize))){
S3FS_PRN_ERR("could not read file(file=%s, ressize=%zd)", path, ressize);
FdManager::get()->Close(ent);
return static_cast<int>(ressize);
}
buf[ressize] = '\0';
// close
FdManager::get()->Close(ent);
}
// check buf if it has space words.
strValue = trim(std::string(buf));
@ -971,14 +969,17 @@ static int s3fs_create(const char* _path, mode_t mode, struct fuse_file_info* fi
return result;
}
AutoFdEntity autoent;
FdEntity* ent;
headers_t meta;
get_object_attribute(path, NULL, &meta, true, NULL, true); // no truncate cache
if(NULL == (ent = FdManager::get()->Open(path, &meta, 0, -1, false, true))){
if(NULL == (ent = autoent.Open(path, &meta, 0, -1, false, true))){
StatCache::getStatCacheData()->DelStat(path);
return -EIO;
}
autoent.Detach(); // KEEP fdentity open
fi->fh = ent->GetFd();
S3FS_MALLOCTRIM(0);
return 0;
@ -1161,24 +1162,26 @@ static int s3fs_symlink(const char* _from, const char* _to)
headers["x-amz-meta-gid"] = str(pcxt->gid);
// open tmpfile
std::string strFrom;
{ // scope for AutoFdEntity
AutoFdEntity autoent;
FdEntity* ent;
if(NULL == (ent = FdManager::get()->Open(to, &headers, 0, -1, true, true))){
if(NULL == (ent = autoent.Open(to, &headers, 0, -1, true, true))){
S3FS_PRN_ERR("could not open tmpfile(errno=%d)", errno);
return -errno;
}
// write(without space words)
std::string strFrom = trim(std::string(from));
strFrom = trim(std::string(from));
ssize_t from_size = static_cast<ssize_t>(strFrom.length());
if(from_size != ent->Write(strFrom.c_str(), 0, from_size)){
S3FS_PRN_ERR("could not write tmpfile(errno=%d)", errno);
FdManager::get()->Close(ent);
return -errno;
}
// upload
if(0 != (result = ent->Flush(true))){
S3FS_PRN_WARN("could not upload tmpfile(result=%d)", result);
}
FdManager::get()->Close(ent);
}
StatCache::getStatCacheData()->DelStat(to);
if(!StatCache::getStatCacheData()->AddSymlink(std::string(to), strFrom)){
@ -1245,8 +1248,10 @@ static int rename_object_nocopy(const char* from, const char* to)
}
// open & load
{ // scope for AutoFdEntity
AutoFdEntity autoent;
FdEntity* ent;
if(NULL == (ent = get_local_fent(from, true))){
if(NULL == (ent = get_local_fent(autoent, from, true))){
S3FS_PRN_ERR("could not open and read file(%s)", from);
return -EIO;
}
@ -1260,12 +1265,10 @@ static int rename_object_nocopy(const char* from, const char* to)
// upload
if(0 != (result = ent->RowFlush(to, true))){
S3FS_PRN_ERR("could not upload file(%s): result=%d", to, result);
FdManager::get()->Close(ent);
return result;
}
FdManager::get()->Rename(from, to);
FdManager::get()->Close(ent);
}
// Remove file
result = s3fs_unlink(from);
@ -1489,15 +1492,16 @@ static int s3fs_rename(const char* _from, const char* _to)
}
// flush pending writes if file is open
FdEntity *entity = FdManager::get()->ExistOpen(from);
if(entity != NULL){
if(0 != (result = entity->Flush(true))){
{ // scope for AutoFdEntity
AutoFdEntity autoent;
FdEntity* ent;
if(NULL != (ent = autoent.ExistOpen(from))){
if(0 != (result = ent->Flush(true))){
S3FS_PRN_ERR("could not upload file(%s): result=%d", to, result);
return result;
}
StatCache::getStatCacheData()->DelStat(from);
FdManager::get()->Close(entity);
entity = NULL;
}
}
// files larger than 5GB must be modified via the multipart interface
@ -1588,8 +1592,9 @@ static int s3fs_chmod(const char* _path, mode_t mode)
// we need to put these header after finishing upload.
// Or if the file is only open, we must update to FdEntity's internal meta.
//
AutoFdEntity autoent;
FdEntity* ent;
if(NULL != (ent = FdManager::get()->ExistOpen(path, -1, true))){
if(NULL != (ent = autoent.ExistOpen(path, -1, true))){
// the file is opened now.
if(ent->MergeOrgMeta(updatemeta)){
// now uploading
@ -1599,12 +1604,10 @@ static int s3fs_chmod(const char* _path, mode_t mode)
// allow to put header
// updatemeta already merged the orgmeta of the opened files.
if(0 != put_headers(strpath.c_str(), updatemeta, true)){
FdManager::get()->Close(ent);
return -EIO;
}
StatCache::getStatCacheData()->DelStat(nowcache);
}
FdManager::get()->Close(ent);
}else{
// not opened file, then put headers
merge_headers(meta, updatemeta, true);
@ -1672,8 +1675,9 @@ static int s3fs_chmod_nocopy(const char* _path, mode_t mode)
// normal object or directory object of newer version
// open & load
AutoFdEntity autoent;
FdEntity* ent;
if(NULL == (ent = get_local_fent(strpath.c_str(), true))){
if(NULL == (ent = get_local_fent(autoent, strpath.c_str(), true))){
S3FS_PRN_ERR("could not open and read file(%s)", strpath.c_str());
return -EIO;
}
@ -1686,11 +1690,8 @@ static int s3fs_chmod_nocopy(const char* _path, mode_t mode)
// upload
if(0 != (result = ent->Flush(true))){
S3FS_PRN_ERR("could not upload file(%s): result=%d", strpath.c_str(), result);
FdManager::get()->Close(ent);
return result;
}
FdManager::get()->Close(ent);
StatCache::getStatCacheData()->DelStat(nowcache);
}
S3FS_MALLOCTRIM(0);
@ -1767,8 +1768,9 @@ static int s3fs_chown(const char* _path, uid_t uid, gid_t gid)
// we need to put these header after finishing upload.
// Or if the file is only open, we must update to FdEntity's internal meta.
//
AutoFdEntity autoent;
FdEntity* ent;
if(NULL != (ent = FdManager::get()->ExistOpen(path, -1, true))){
if(NULL != (ent = autoent.ExistOpen(path, -1, true))){
// the file is opened now.
if(ent->MergeOrgMeta(updatemeta)){
// now uploading
@ -1778,12 +1780,10 @@ static int s3fs_chown(const char* _path, uid_t uid, gid_t gid)
// allow to put header
// updatemeta already merged the orgmeta of the opened files.
if(0 != put_headers(strpath.c_str(), updatemeta, true)){
FdManager::get()->Close(ent);
return -EIO;
}
StatCache::getStatCacheData()->DelStat(nowcache);
}
FdManager::get()->Close(ent);
}else{
// not opened file, then put headers
merge_headers(meta, updatemeta, true);
@ -1858,8 +1858,9 @@ static int s3fs_chown_nocopy(const char* _path, uid_t uid, gid_t gid)
// normal object or directory object of newer version
// open & load
AutoFdEntity autoent;
FdEntity* ent;
if(NULL == (ent = get_local_fent(strpath.c_str(), true))){
if(NULL == (ent = get_local_fent(autoent, strpath.c_str(), true))){
S3FS_PRN_ERR("could not open and read file(%s)", strpath.c_str());
return -EIO;
}
@ -1873,11 +1874,8 @@ static int s3fs_chown_nocopy(const char* _path, uid_t uid, gid_t gid)
// upload
if(0 != (result = ent->Flush(true))){
S3FS_PRN_ERR("could not upload file(%s): result=%d", strpath.c_str(), result);
FdManager::get()->Close(ent);
return result;
}
FdManager::get()->Close(ent);
StatCache::getStatCacheData()->DelStat(nowcache);
}
S3FS_MALLOCTRIM(0);
@ -1948,8 +1946,9 @@ static int s3fs_utimens(const char* _path, const struct timespec ts[2])
// we need to put these header after finishing upload.
// Or if the file is only open, we must update to FdEntity's internal meta.
//
AutoFdEntity autoent;
FdEntity* ent;
if(NULL != (ent = FdManager::get()->ExistOpen(path, -1, true))){
if(NULL != (ent = autoent.ExistOpen(path, -1, true))){
// the file is opened now.
if(ent->MergeOrgMeta(updatemeta)){
// now uploading
@ -1959,12 +1958,10 @@ static int s3fs_utimens(const char* _path, const struct timespec ts[2])
// allow to put header
// updatemeta already merged the orgmeta of the opened files.
if(0 != put_headers(strpath.c_str(), updatemeta, true)){
FdManager::get()->Close(ent);
return -EIO;
}
StatCache::getStatCacheData()->DelStat(nowcache);
}
FdManager::get()->Close(ent);
}else{
// not opened file, then put headers
merge_headers(meta, updatemeta, true);
@ -2034,8 +2031,9 @@ static int s3fs_utimens_nocopy(const char* _path, const struct timespec ts[2])
// normal object or directory object of newer version
// open & load
AutoFdEntity autoent;
FdEntity* ent;
if(NULL == (ent = get_local_fent(strpath.c_str(), true))){
if(NULL == (ent = get_local_fent(autoent, strpath.c_str(), true))){
S3FS_PRN_ERR("could not open and read file(%s)", strpath.c_str());
return -EIO;
}
@ -2043,18 +2041,14 @@ static int s3fs_utimens_nocopy(const char* _path, const struct timespec ts[2])
// set mtime
if(0 != (result = ent->SetMtime(ts[1].tv_sec))){
S3FS_PRN_ERR("could not set mtime to file(%s): result=%d", strpath.c_str(), result);
FdManager::get()->Close(ent);
return result;
}
// upload
if(0 != (result = ent->Flush(true))){
S3FS_PRN_ERR("could not upload file(%s): result=%d", strpath.c_str(), result);
FdManager::get()->Close(ent);
return result;
}
FdManager::get()->Close(ent);
StatCache::getStatCacheData()->DelStat(nowcache);
}
S3FS_MALLOCTRIM(0);
@ -2067,6 +2061,7 @@ static int s3fs_truncate(const char* _path, off_t size)
WTF8_ENCODE(path)
int result;
headers_t meta;
AutoFdEntity autoent;
FdEntity* ent = NULL;
S3FS_PRN_INFO("[path=%s][size=%lld]", path, static_cast<long long>(size));
@ -2085,13 +2080,12 @@ static int s3fs_truncate(const char* _path, off_t size)
// Get file information
if(0 == (result = get_object_attribute(path, NULL, &meta))){
// Exists -> Get file(with size)
if(NULL == (ent = FdManager::get()->Open(path, &meta, size, -1, false, true))){
if(NULL == (ent = autoent.Open(path, &meta, size, -1, false, true))){
S3FS_PRN_ERR("could not open file(%s): errno=%d", path, errno);
return -EIO;
}
if(0 != (result = ent->Load(0, size))){
S3FS_PRN_ERR("could not download file(%s): result=%d", path, result);
FdManager::get()->Close(ent);
return result;
}
@ -2110,7 +2104,7 @@ static int s3fs_truncate(const char* _path, off_t size)
meta["x-amz-meta-uid"] = str(pcxt->uid);
meta["x-amz-meta-gid"] = str(pcxt->gid);
if(NULL == (ent = FdManager::get()->Open(path, &meta, size, -1, true, true))){
if(NULL == (ent = autoent.Open(path, &meta, size, -1, true, true))){
S3FS_PRN_ERR("could not open file(%s): errno=%d", path, errno);
return -EIO;
}
@ -2119,10 +2113,8 @@ static int s3fs_truncate(const char* _path, off_t size)
// upload
if(0 != (result = ent->Flush(true))){
S3FS_PRN_ERR("could not upload file(%s): result=%d", path, result);
FdManager::get()->Close(ent);
return result;
}
FdManager::get()->Close(ent);
StatCache::getStatCacheData()->DelStat(path);
S3FS_MALLOCTRIM(0);
@ -2174,10 +2166,11 @@ static int s3fs_open(const char* _path, struct fuse_file_info* fi)
st.st_mtime = -1;
}
AutoFdEntity autoent;
FdEntity* ent;
headers_t meta;
get_object_attribute(path, NULL, &meta, true, NULL, true); // no truncate cache
if(NULL == (ent = FdManager::get()->Open(path, &meta, st.st_size, st.st_mtime, false, true))){
if(NULL == (ent = autoent.Open(path, &meta, st.st_size, st.st_mtime, false, true))){
StatCache::getStatCacheData()->DelStat(path);
return -EIO;
}
@ -2185,13 +2178,13 @@ static int s3fs_open(const char* _path, struct fuse_file_info* fi)
if (needs_flush){
if(0 != (result = ent->RowFlush(path, true))){
S3FS_PRN_ERR("could not upload file(%s): result=%d", path, result);
FdManager::get()->Close(ent);
StatCache::getStatCacheData()->DelStat(path);
return result;
}
}
autoent.Detach(); // KEEP fdentity open
fi->fh = ent->GetFd();
S3FS_MALLOCTRIM(0);
return 0;
@ -2204,8 +2197,9 @@ static int s3fs_read(const char* _path, char* buf, size_t size, off_t offset, st
S3FS_PRN_DBG("[path=%s][size=%zu][offset=%lld][fd=%llu]", path, size, static_cast<long long>(offset), (unsigned long long)(fi->fh));
AutoFdEntity autoent;
FdEntity* ent;
if(NULL == (ent = FdManager::get()->ExistOpen(path, static_cast<int>(fi->fh)))){
if(NULL == (ent = autoent.ExistOpen(path, static_cast<int>(fi->fh)))){
S3FS_PRN_ERR("could not find opened fd(%s)", path);
return -EIO;
}
@ -2217,14 +2211,12 @@ static int s3fs_read(const char* _path, char* buf, size_t size, off_t offset, st
off_t realsize = 0;
if(!ent->GetSize(realsize) || 0 == realsize){
S3FS_PRN_DBG("file size is 0, so break to read.");
FdManager::get()->Close(ent);
return 0;
}
if(0 > (res = ent->Read(buf, offset, size, false))){
S3FS_PRN_WARN("failed to read file(%s). result=%zd", path, res);
}
FdManager::get()->Close(ent);
return static_cast<int>(res);
}
@ -2236,8 +2228,9 @@ static int s3fs_write(const char* _path, const char* buf, size_t size, off_t off
S3FS_PRN_DBG("[path=%s][size=%zu][offset=%lld][fd=%llu]", path, size, static_cast<long long int>(offset), (unsigned long long)(fi->fh));
AutoFdEntity autoent;
FdEntity* ent;
if(NULL == (ent = FdManager::get()->ExistOpen(path, static_cast<int>(fi->fh)))){
if(NULL == (ent = autoent.ExistOpen(path, static_cast<int>(fi->fh)))){
S3FS_PRN_ERR("could not find opened fd(%s)", path);
return -EIO;
}
@ -2247,7 +2240,6 @@ static int s3fs_write(const char* _path, const char* buf, size_t size, off_t off
if(0 > (res = ent->Write(buf, offset, size))){
S3FS_PRN_WARN("failed to write file(%s). result=%zd", path, res);
}
FdManager::get()->Close(ent);
return static_cast<int>(res);
}
@ -2284,11 +2276,11 @@ static int s3fs_flush(const char* _path, struct fuse_file_info* fi)
return result;
}
AutoFdEntity autoent;
FdEntity* ent;
if(NULL != (ent = FdManager::get()->ExistOpen(path, static_cast<int>(fi->fh)))){
if(NULL != (ent = autoent.ExistOpen(path, static_cast<int>(fi->fh)))){
ent->UpdateMtime();
result = ent->Flush(false);
FdManager::get()->Close(ent);
}
S3FS_MALLOCTRIM(0);
@ -2305,13 +2297,13 @@ static int s3fs_fsync(const char* _path, int datasync, struct fuse_file_info* fi
S3FS_PRN_INFO("[path=%s][fd=%llu]", path, (unsigned long long)(fi->fh));
AutoFdEntity autoent;
FdEntity* ent;
if(NULL != (ent = FdManager::get()->ExistOpen(path, static_cast<int>(fi->fh)))){
if(NULL != (ent = autoent.ExistOpen(path, static_cast<int>(fi->fh)))){
if(0 == datasync){
ent->UpdateMtime();
}
result = ent->Flush(false);
FdManager::get()->Close(ent);
}
S3FS_MALLOCTRIM(0);
@ -2341,22 +2333,30 @@ static int s3fs_release(const char* _path, struct fuse_file_info* fi)
StatCache::getStatCacheData()->DelStat(path);
}
{ // scope for AutoFdEntity
AutoFdEntity autoent;
FdEntity* ent;
if(NULL == (ent = FdManager::get()->GetFdEntity(path, static_cast<int>(fi->fh)))){
// [NOTE]
// The number of references to fdEntity corresponding to fi-> fh is already incremented
// when it is opened. Therefore, when an existing fdEntity is detected here, the reference
// count must not be incremented. And if detected, the number of references incremented
// when opened will be decremented when the AutoFdEntity object is subsequently destroyed.
//
if(NULL == (ent = autoent.GetFdEntity(path, static_cast<int>(fi->fh), false))){
S3FS_PRN_ERR("could not find fd(file=%s)", path);
return -EIO;
}
if(ent->GetFd() != static_cast<int>(fi->fh)){
S3FS_PRN_WARN("different fd(%d - %llu)", ent->GetFd(), (unsigned long long)(fi->fh));
}
// Once for the implicit refcnt from GetFdEntity and again for release
ent->Close();
FdManager::get()->Close(ent);
}
// check - for debug
if(IS_S3FS_LOG_DBG()){
if(NULL != (ent = FdManager::get()->GetFdEntity(path, static_cast<int>(fi->fh)))){
AutoFdEntity autoent;
FdEntity* ent;
if(NULL != (ent = autoent.GetFdEntity(path, static_cast<int>(fi->fh)))){
S3FS_PRN_WARN("file(%s),fd(%d) is still opened.", path, ent->GetFd());
}
}
@ -2899,8 +2899,9 @@ static int s3fs_setxattr(const char* path, const char* name, const char* value,
// we need to put these header after finishing upload.
// Or if the file is only open, we must update to FdEntity's internal meta.
//
AutoFdEntity autoent;
FdEntity* ent;
if(NULL != (ent = FdManager::get()->ExistOpen(path, -1, true))){
if(NULL != (ent = autoent.ExistOpen(path, -1, true))){
// the file is opened now.
// get xattr and make new xattr
@ -2914,7 +2915,6 @@ static int s3fs_setxattr(const char* path, const char* name, const char* value,
ent->SetXattr(strxattr);
}
if(0 != (result = set_xattrs_to_header(updatemeta, name, value, size, flags))){
FdManager::get()->Close(ent);
return result;
}
@ -2926,12 +2926,10 @@ static int s3fs_setxattr(const char* path, const char* name, const char* value,
// allow to put header
// updatemeta already merged the orgmeta of the opened files.
if(0 != put_headers(strpath.c_str(), updatemeta, true)){
FdManager::get()->Close(ent);
return -EIO;
}
StatCache::getStatCacheData()->DelStat(nowcache);
}
FdManager::get()->Close(ent);
}else{
// not opened file, then put headers
merge_headers(meta, updatemeta, true);
@ -3191,8 +3189,9 @@ static int s3fs_removexattr(const char* path, const char* name)
// we need to put these header after finishing upload.
// Or if the file is only open, we must update to FdEntity's internal meta.
//
AutoFdEntity autoent;
FdEntity* ent;
if(NULL != (ent = FdManager::get()->ExistOpen(path, -1, true))){
if(NULL != (ent = autoent.ExistOpen(path, -1, true))){
// the file is opened now.
if(ent->MergeOrgMeta(updatemeta)){
// now uploading
@ -3205,12 +3204,10 @@ static int s3fs_removexattr(const char* path, const char* name)
updatemeta.erase("x-amz-meta-xattr");
}
if(0 != put_headers(strpath.c_str(), updatemeta, true)){
FdManager::get()->Close(ent);
return -EIO;
}
StatCache::getStatCacheData()->DelStat(nowcache);
}
FdManager::get()->Close(ent);
}else{
// not opened file, then put headers
if(updatemeta["x-amz-meta-xattr"].empty()){