forked from jiuyuan/JYCache
271 lines
11 KiB
C
271 lines
11 KiB
C
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/*
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* s3fs - FUSE-based file system backed by Amazon S3
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*
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* Copyright(C) 2007 Randy Rizun <rrizun@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef S3FS_LOGGER_H_
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#define S3FS_LOGGER_H_
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#include <cstdarg>
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#include <cstdio>
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#include <string>
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#include <syslog.h>
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#include <sys/time.h>
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#include "common.h"
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#ifdef CLOCK_MONOTONIC_COARSE
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#define S3FS_CLOCK_MONOTONIC CLOCK_MONOTONIC_COARSE
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#else
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// case of OSX
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#define S3FS_CLOCK_MONOTONIC CLOCK_MONOTONIC
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#endif
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//-------------------------------------------------------------------
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// S3fsLog class
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//-------------------------------------------------------------------
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class S3fsLog
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{
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public:
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enum s3fs_log_level{
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LEVEL_CRIT = 0, // LEVEL_CRIT
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LEVEL_ERR = 1, // LEVEL_ERR
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LEVEL_WARN = 3, // LEVEL_WARNING
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LEVEL_INFO = 7, // LEVEL_INFO
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LEVEL_DBG = 15 // LEVEL_DEBUG
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};
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protected:
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static constexpr int NEST_MAX = 4;
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static constexpr const char* nest_spaces[NEST_MAX] = {"", " ", " ", " "};
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static constexpr char LOGFILEENV[] = "S3FS_LOGFILE";
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static constexpr char MSGTIMESTAMP[] = "S3FS_MSGTIMESTAMP";
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static S3fsLog* pSingleton;
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static s3fs_log_level debug_level;
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static FILE* logfp;
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static std::string logfile;
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static bool time_stamp;
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protected:
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bool LowLoadEnv();
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bool LowSetLogfile(const char* pfile);
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s3fs_log_level LowSetLogLevel(s3fs_log_level level);
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s3fs_log_level LowBumpupLogLevel();
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public:
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static bool IsS3fsLogLevel(s3fs_log_level level);
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static bool IsS3fsLogCrit() { return IsS3fsLogLevel(LEVEL_CRIT); }
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static bool IsS3fsLogErr() { return IsS3fsLogLevel(LEVEL_ERR); }
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static bool IsS3fsLogWarn() { return IsS3fsLogLevel(LEVEL_WARN); }
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static bool IsS3fsLogInfo() { return IsS3fsLogLevel(LEVEL_INFO); }
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static bool IsS3fsLogDbg() { return IsS3fsLogLevel(LEVEL_DBG); }
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static constexpr int GetSyslogLevel(s3fs_log_level level)
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{
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return ( LEVEL_DBG == (level & LEVEL_DBG) ? LOG_DEBUG :
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LEVEL_INFO == (level & LEVEL_DBG) ? LOG_INFO :
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LEVEL_WARN == (level & LEVEL_DBG) ? LOG_WARNING :
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LEVEL_ERR == (level & LEVEL_DBG) ? LOG_ERR : LOG_CRIT );
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}
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static std::string GetCurrentTime();
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static constexpr const char* GetLevelString(s3fs_log_level level)
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{
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return ( LEVEL_DBG == (level & LEVEL_DBG) ? "[DBG] " :
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LEVEL_INFO == (level & LEVEL_DBG) ? "[INF] " :
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LEVEL_WARN == (level & LEVEL_DBG) ? "[WAN] " :
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LEVEL_ERR == (level & LEVEL_DBG) ? "[ERR] " : "[CRT] " );
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}
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static constexpr const char* GetS3fsLogNest(int nest)
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{
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return nest_spaces[nest < NEST_MAX ? nest : NEST_MAX - 1];
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}
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static bool IsSetLogFile()
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{
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return (nullptr != logfp);
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}
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static FILE* GetOutputLogFile()
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{
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return (logfp ? logfp : stdout);
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}
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static FILE* GetErrorLogFile()
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{
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return (logfp ? logfp : stderr);
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}
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static void SeekEnd()
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{
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if(logfp){
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fseek(logfp, 0, SEEK_END);
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}
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}
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static void Flush()
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{
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if(logfp){
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fflush(logfp);
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}
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}
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static bool SetLogfile(const char* pfile);
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static bool ReopenLogfile();
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static s3fs_log_level SetLogLevel(s3fs_log_level level);
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static s3fs_log_level BumpupLogLevel();
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static bool SetTimeStamp(bool value);
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explicit S3fsLog();
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~S3fsLog();
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S3fsLog(const S3fsLog&) = delete;
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S3fsLog(S3fsLog&&) = delete;
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S3fsLog& operator=(const S3fsLog&) = delete;
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S3fsLog& operator=(S3fsLog&&) = delete;
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};
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//-------------------------------------------------------------------
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// Debug macros
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//-------------------------------------------------------------------
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void s3fs_low_logprn(S3fsLog::s3fs_log_level level, const char* file, const char *func, int line, const char *fmt, ...) __attribute__ ((format (printf, 5, 6)));
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#define S3FS_LOW_LOGPRN(level, fmt, ...) \
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do{ \
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s3fs_low_logprn(level, __FILE__, __func__, __LINE__, fmt, ##__VA_ARGS__); \
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}while(0)
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void s3fs_low_logprn2(S3fsLog::s3fs_log_level level, int nest, const char* file, const char *func, int line, const char *fmt, ...) __attribute__ ((format (printf, 6, 7)));
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#define S3FS_LOW_LOGPRN2(level, nest, fmt, ...) \
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do{ \
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s3fs_low_logprn2(level, nest, __FILE__, __func__, __LINE__, fmt, ##__VA_ARGS__); \
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}while(0)
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#define S3FS_LOW_CURLDBG(fmt, ...) \
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do{ \
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if(foreground || S3fsLog::IsSetLogFile()){ \
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S3fsLog::SeekEnd(); \
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fprintf(S3fsLog::GetOutputLogFile(), "%s[CURL DBG] " fmt "%s\n", S3fsLog::GetCurrentTime().c_str(), __VA_ARGS__); \
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S3fsLog::Flush(); \
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}else{ \
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syslog(S3fsLog::GetSyslogLevel(S3fsLog::LEVEL_CRIT), "%s" fmt "%s", instance_name.c_str(), __VA_ARGS__); \
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} \
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}while(0)
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#define S3FS_LOW_LOGPRN_EXIT(fmt, ...) \
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do{ \
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if(foreground || S3fsLog::IsSetLogFile()){ \
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S3fsLog::SeekEnd(); \
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fprintf(S3fsLog::GetErrorLogFile(), "s3fs: " fmt "%s\n", __VA_ARGS__); \
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S3fsLog::Flush(); \
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}else{ \
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fprintf(S3fsLog::GetErrorLogFile(), "s3fs: " fmt "%s\n", __VA_ARGS__); \
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syslog(S3fsLog::GetSyslogLevel(S3fsLog::LEVEL_CRIT), "%ss3fs: " fmt "%s", instance_name.c_str(), __VA_ARGS__); \
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} \
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}while(0)
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// Special macro for init message
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#define S3FS_PRN_INIT_INFO(fmt, ...) \
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do{ \
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if(foreground || S3fsLog::IsSetLogFile()){ \
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S3fsLog::SeekEnd(); \
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fprintf(S3fsLog::GetOutputLogFile(), "%s%s%s%s:%s(%d): " fmt "%s\n", S3fsLog::GetCurrentTime().c_str(), S3fsLog::GetLevelString(S3fsLog::LEVEL_INFO), S3fsLog::GetS3fsLogNest(0), __FILE__, __func__, __LINE__, __VA_ARGS__, ""); \
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S3fsLog::Flush(); \
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}else{ \
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syslog(S3fsLog::GetSyslogLevel(S3fsLog::LEVEL_INFO), "%s%s" fmt "%s", instance_name.c_str(), S3fsLog::GetS3fsLogNest(0), __VA_ARGS__, ""); \
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} \
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}while(0)
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#define S3FS_PRN_LAUNCH_INFO(fmt, ...) \
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do{ \
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if(foreground || S3fsLog::IsSetLogFile()){ \
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S3fsLog::SeekEnd(); \
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fprintf(S3fsLog::GetOutputLogFile(), "%s%s" fmt "%s\n", S3fsLog::GetCurrentTime().c_str(), S3fsLog::GetLevelString(S3fsLog::LEVEL_INFO), __VA_ARGS__, ""); \
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S3fsLog::Flush(); \
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}else{ \
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syslog(S3fsLog::GetSyslogLevel(S3fsLog::LEVEL_INFO), "%s" fmt "%s", instance_name.c_str(), __VA_ARGS__, ""); \
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} \
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}while(0)
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// Special macro for checking cache files
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#define S3FS_LOW_CACHE(fp, fmt, ...) \
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do{ \
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if(foreground || S3fsLog::IsSetLogFile()){ \
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S3fsLog::SeekEnd(); \
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fprintf(fp, fmt "%s\n", __VA_ARGS__); \
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S3fsLog::Flush(); \
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}else{ \
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syslog(S3fsLog::GetSyslogLevel(S3fsLog::LEVEL_INFO), "%s: " fmt "%s", instance_name.c_str(), __VA_ARGS__); \
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} \
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}while(0)
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// [NOTE]
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// small trick for VA_ARGS
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//
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#define S3FS_PRN_EXIT(fmt, ...) S3FS_LOW_LOGPRN_EXIT(fmt, ##__VA_ARGS__, "")
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#define S3FS_PRN_CRIT(fmt, ...) S3FS_LOW_LOGPRN(S3fsLog::LEVEL_CRIT, fmt, ##__VA_ARGS__)
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#define S3FS_PRN_ERR(fmt, ...) S3FS_LOW_LOGPRN(S3fsLog::LEVEL_ERR, fmt, ##__VA_ARGS__)
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#define S3FS_PRN_WARN(fmt, ...) S3FS_LOW_LOGPRN(S3fsLog::LEVEL_WARN, fmt, ##__VA_ARGS__)
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#define S3FS_PRN_DBG(fmt, ...) S3FS_LOW_LOGPRN(S3fsLog::LEVEL_DBG, fmt, ##__VA_ARGS__)
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#define S3FS_PRN_INFO(fmt, ...) S3FS_LOW_LOGPRN2(S3fsLog::LEVEL_INFO, 0, fmt, ##__VA_ARGS__)
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#define S3FS_PRN_INFO1(fmt, ...) S3FS_LOW_LOGPRN2(S3fsLog::LEVEL_INFO, 1, fmt, ##__VA_ARGS__)
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#define S3FS_PRN_INFO2(fmt, ...) S3FS_LOW_LOGPRN2(S3fsLog::LEVEL_INFO, 2, fmt, ##__VA_ARGS__)
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#define S3FS_PRN_INFO3(fmt, ...) S3FS_LOW_LOGPRN2(S3fsLog::LEVEL_INFO, 3, fmt, ##__VA_ARGS__)
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#define S3FS_PRN_CURL(fmt, ...) S3FS_LOW_CURLDBG(fmt, ##__VA_ARGS__, "")
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#define S3FS_PRN_CACHE(fp, ...) S3FS_LOW_CACHE(fp, ##__VA_ARGS__, "")
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// Macros to print log with fuse context
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#define PRINT_FUSE_CTX(level, indent, fmt, ...) do { \
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if(S3fsLog::IsS3fsLogLevel(level)){ \
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struct fuse_context *ctx = fuse_get_context(); \
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if(ctx == NULL){ \
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S3FS_LOW_LOGPRN2(level, indent, fmt, ##__VA_ARGS__); \
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}else{ \
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S3FS_LOW_LOGPRN2(level, indent, fmt"[pid=%u,uid=%u,gid=%u]",\
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##__VA_ARGS__, \
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(unsigned int)(ctx->pid), \
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(unsigned int)(ctx->uid), \
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(unsigned int)(ctx->gid)); \
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} \
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} \
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} while (0)
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#define FUSE_CTX_INFO(fmt, ...) do { \
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PRINT_FUSE_CTX(S3fsLog::LEVEL_INFO, 0, fmt, ##__VA_ARGS__); \
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} while (0)
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#define FUSE_CTX_INFO1(fmt, ...) do { \
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PRINT_FUSE_CTX(S3fsLog::LEVEL_INFO, 1, fmt, ##__VA_ARGS__); \
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} while (0)
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#define FUSE_CTX_DBG(fmt, ...) do { \
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PRINT_FUSE_CTX(S3fsLog::LEVEL_DBG, 0, fmt, ##__VA_ARGS__); \
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} while (0)
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#endif // S3FS_LOGGER_H_
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: expandtab sw=4 ts=4 fdm=marker
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* vim<600: expandtab sw=4 ts=4
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*/
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