1 /* 2 * Copyright (C) 2012-2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _LOGD_LOG_BUFFER_H__ 18 #define _LOGD_LOG_BUFFER_H__ 19 20 #include <sys/types.h> 21 22 #include <log/log.h> 23 #include <sysutils/SocketClient.h> 24 #include <utils/List.h> 25 26 #include <private/android_filesystem_config.h> 27 28 #include "LogBufferElement.h" 29 #include "LogTimes.h" 30 #include "LogStatistics.h" 31 #include "LogWhiteBlackList.h" 32 33 typedef android::List<LogBufferElement *> LogBufferElementCollection; 34 35 class LogBuffer { 36 LogBufferElementCollection mLogElements; 37 pthread_mutex_t mLogElementsLock; 38 39 LogStatistics stats; 40 41 bool dgram_qlen_statistics; 42 43 PruneList mPrune; 44 45 unsigned long mMaxSize[LOG_ID_MAX]; 46 47 public: 48 LastLogTimes &mTimes; 49 50 LogBuffer(LastLogTimes *times); 51 52 void log(log_id_t log_id, log_time realtime, 53 uid_t uid, pid_t pid, pid_t tid, 54 const char *msg, unsigned short len); 55 log_time flushTo(SocketClient *writer, const log_time start, 56 bool privileged, 57 bool (*filter)(const LogBufferElement *element, void *arg) = NULL, 58 void *arg = NULL); 59 60 void clear(log_id_t id, uid_t uid = AID_ROOT); 61 unsigned long getSize(log_id_t id); 62 int setSize(log_id_t id, unsigned long size); 63 unsigned long getSizeUsed(log_id_t id); 64 // *strp uses malloc, use free to release. 65 void formatStatistics(char **strp, uid_t uid, unsigned int logMask); 66 67 void enableDgramQlenStatistics() { 68 stats.enableDgramQlenStatistics(); 69 dgram_qlen_statistics = true; 70 } 71 72 int initPrune(char *cp) { return mPrune.init(cp); } 73 // *strp uses malloc, use free to release. 74 void formatPrune(char **strp) { mPrune.format(strp); } 75 76 // helper 77 char *pidToName(pid_t pid) { return stats.pidToName(pid); } 78 uid_t pidToUid(pid_t pid) { return stats.pidToUid(pid); } 79 80 private: 81 void maybePrune(log_id_t id); 82 void prune(log_id_t id, unsigned long pruneRows, uid_t uid = AID_ROOT); 83 84 }; 85 86 #endif // _LOGD_LOG_BUFFER_H__ 87