Write statsd configuration to disk and add cmd to clear it (87d983cf) · Commits · e / os / android_frameworks_base

cmds/statsd/src/StatsService.cpp

+33 −1

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		#define DEBUG true
		#include "Log.h"

		#include "android-base/stringprintf.h"
		#include "StatsService.h"
		#include "config/ConfigKey.h"
		#include "config/ConfigManager.h"
		@@ -25,11 +26,11 @@
		#include <android-base/file.h>
		#include <binder/IPCThreadState.h>
		#include <binder/IServiceManager.h>
		#include <dirent.h>
		#include <frameworks/base/cmds/statsd/src/statsd_config.pb.h>
		#include <private/android_filesystem_config.h>
		#include <utils/Looper.h>
		#include <utils/String16.h>

		#include <stdio.h>
		#include <stdlib.h>
		#include <sys/system_properties.h>
		@@ -42,6 +43,7 @@ namespace os {
		namespace statsd {

		constexpr const char* kPermissionDump = "android.permission.DUMP";
		#define STATS_SERVICE_DIR "/data/system/stats-service"

		// ======================================================================
		/**
		@@ -206,6 +208,10 @@ status_t StatsService::command(FILE* in, FILE* out, FILE* err, Vector<String8>&
		if (!args[0].compare(String8("send-broadcast"))) {
		return cmd_trigger_broadcast(args);
		}

		if (!args[0].compare(String8("clear-config"))) {
		return cmd_remove_config_files(out);
		}
		}

		print_cmd_help(out);
		@@ -223,6 +229,11 @@ void StatsService::print_cmd_help(FILE* out) {
		fprintf(out, " Prints the UID, app name, version mapping.\n");
		fprintf(out, "\n");
		fprintf(out, "\n");
		fprintf(out, "usage: adb shell cmd stats clear-config \n");
		fprintf(out, "\n");
		fprintf(out, " Removes all configs from disk.\n");
		fprintf(out, "\n");
		fprintf(out, "\n");
		fprintf(out, "usage: adb shell cmds stats pull-source [int] \n");
		fprintf(out, "\n");
		fprintf(out, " Prints the output of a pulled metrics source (int indicates source)\n");
		@@ -405,6 +416,27 @@ status_t StatsService::cmd_print_pulled_metrics(FILE* out, const Vector<String8>
		return UNKNOWN_ERROR;
		}

		status_t StatsService::cmd_remove_config_files(FILE* out) {
		fprintf(out, "Trying to remove config files...\n");
		unique_ptr<DIR, decltype(&closedir)> dir(opendir(STATS_SERVICE_DIR), closedir);
		if (dir == NULL) {
		fprintf(out, "No existing config files found exiting...\n");
		return NO_ERROR;
		}

		dirent* de;
		while ((de = readdir(dir.get()))) {
		char* name = de->d_name;
		if (name[0] == '.') continue;
		string file_name = StringPrintf("%s/%s", STATS_SERVICE_DIR, name);
		fprintf(out, "Deleting file %s\n", file_name.c_str());
		if (remove(file_name.c_str())) {
		fprintf(out, "Error deleting file %s\n", file_name.c_str());
		}
		}
		return NO_ERROR;
		}

		Status StatsService::informAllUidData(const vector<int32_t>& uid, const vector<int32_t>& version,
		const vector<String16>& app) {
		if (DEBUG) ALOGD("StatsService::informAllUidData was called");

cmds/statsd/src/StatsService.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -151,6 +151,11 @@ private:
		*/
		status_t cmd_print_pulled_metrics(FILE* out, const Vector<String8>& args);

		/**
		* Removes all configs stored on disk.
		*/
		status_t cmd_remove_config_files(FILE* out);

		/**
		* Update a configuration.
		*/

cmds/statsd/src/config/ConfigKey.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -78,7 +78,7 @@ inline ostream& operator<<(ostream& os, const ConfigKey& config) {

		/**
		* A hash function for ConfigKey so it can be used for unordered_map/set.
		* Unfortunately this hast to go in std namespace because C++ is fun!
		* Unfortunately this has to go in std namespace because C++ is fun!
		*/
		namespace std {

cmds/statsd/src/config/ConfigManager.cpp

+91 −9

Original line number	Diff line number	Diff line
		@@ -18,16 +18,23 @@

		#include "stats_util.h"

		#include <vector>

		#include <android-base/file.h>
		#include <dirent.h>
		#include <stdio.h>
		#include <vector>
		#include "android-base/stringprintf.h"

		namespace android {
		namespace os {
		namespace statsd {

		#define STATS_SERVICE_DIR "/data/system/stats-service"

		static StatsdConfig build_fake_config();

		using android::base::StringPrintf;
		using std::unique_ptr;

		ConfigManager::ConfigManager() {
		}

		@@ -35,8 +42,7 @@ ConfigManager::~ConfigManager() {
		}

		void ConfigManager::Startup() {
		// TODO: Implement me -- read from storage and call onto all of the listeners.
		// Instead, we'll just make a fake one.
		readConfigFromDisk();

		// this should be called from StatsService when it receives a statsd_config
		UpdateConfig(ConfigKey(0, "fake"), build_fake_config());
		@@ -52,7 +58,7 @@ void ConfigManager::UpdateConfig(const ConfigKey& key, const StatsdConfig& confi
		// Why doesn't this work? mConfigs.insert({key, config});

		// Save to disk
		update_saved_configs();
		update_saved_configs(key, config);

		// Tell everyone
		for (auto& listener : mListeners) {
		@@ -74,8 +80,8 @@ void ConfigManager::RemoveConfig(const ConfigKey& key) {
		// Remove from map
		mConfigs.erase(it);

		// Save to disk
		update_saved_configs();
		// Remove from disk
		remove_saved_configs(key);

		// Tell everyone
		for (auto& listener : mListeners) {
		@@ -85,6 +91,26 @@ void ConfigManager::RemoveConfig(const ConfigKey& key) {
		// If we didn't find it, just quietly ignore it.
		}

		void ConfigManager::remove_saved_configs(const ConfigKey& key) {
		unique_ptr<DIR, decltype(&closedir)> dir(opendir(STATS_SERVICE_DIR), closedir);
		if (dir == NULL) {
		ALOGD("no default config on disk");
		return;
		}
		string prefix = StringPrintf("%d-%s", key.GetUid(), key.GetName().c_str());
		dirent* de;
		while ((de = readdir(dir.get()))) {
		char* name = de->d_name;
		if (name[0] != '.' && strncmp(name, prefix.c_str(), prefix.size()) == 0) {
		if (remove(StringPrintf("%s/%d-%s", STATS_SERVICE_DIR, key.GetUid(),
		key.GetName().c_str())
		.c_str()) != 0) {
		ALOGD("no file found");
		}
		}
		}
		}

		void ConfigManager::RemoveConfigs(int uid) {
		vector<ConfigKey> removed;

		@@ -118,8 +144,64 @@ void ConfigManager::Dump(FILE* out) {
		}
		}

		void ConfigManager::update_saved_configs() {
		// TODO: Implement me -- write to disk.
		void ConfigManager::readConfigFromDisk() {
		unique_ptr<DIR, decltype(&closedir)> dir(opendir(STATS_SERVICE_DIR), closedir);
		if (dir == NULL) {
		ALOGD("no default config on disk");
		return;
		}

		dirent* de;
		while ((de = readdir(dir.get()))) {
		char* name = de->d_name;
		if (name[0] == '.') continue;
		ALOGD("file %s", name);

		int index = 0;
		int uid = 0;
		string configName;
		char* substr = strtok(name, "-");
		// Timestamp lives at index 2 but we skip parsing it as it's not needed.
		while (substr != nullptr && index < 2) {
		if (index) {
		uid = atoi(substr);
		} else {
		configName = substr;
		}
		index++;
		}
		if (index < 2) continue;
		string file_name = StringPrintf("%s/%s", STATS_SERVICE_DIR, name);
		ALOGD("full file %s", file_name.c_str());
		int fd = open(file_name.c_str(), O_RDONLY \| O_CLOEXEC);
		if (fd != -1) {
		string content;
		if (android::base::ReadFdToString(fd, &content)) {
		StatsdConfig config;
		if (config.ParseFromString(content)) {
		mConfigs[ConfigKey(uid, configName)] = config;
		ALOGD("map key uid=%d\|name=%s", uid, name);
		}
		}
		close(fd);
		}
		}
		}

		void ConfigManager::update_saved_configs(const ConfigKey& key, const StatsdConfig& config) {
		mkdir(STATS_SERVICE_DIR, S_IRWXU);
		string file_name = StringPrintf("%s/%d-%s-%ld", STATS_SERVICE_DIR, key.GetUid(),
		key.GetName().c_str(), time(nullptr));
		int fd = open(file_name.c_str(), O_WRONLY \| O_CREAT \| O_CLOEXEC, S_IRUSR \| S_IWUSR);
		if (fd != -1) {
		const int numBytes = config.ByteSize();
		vector<uint8_t> buffer(numBytes);
		config.SerializeToArray(&buffer[0], numBytes);
		int result = write(fd, &buffer[0], numBytes);
		close(fd);
		bool wroteKey = (result == numBytes);
		ALOGD("wrote to file %d", wroteKey);
		}
		}

		static StatsdConfig build_fake_config() {

cmds/statsd/src/config/ConfigManager.h

+12 −4

Original line number	Diff line number	Diff line
		@@ -46,9 +46,7 @@ public:
		virtual ~ConfigManager();

		/**
		* Call to load the saved configs from disk.
		*
		* TODO: Implement me
		* Initialize ConfigListener by reading from disk and get updates.
		*/
		void Startup();

		@@ -95,7 +93,12 @@ private:
		/**
		* Save the configs to disk.
		*/
		void update_saved_configs();
		void update_saved_configs(const ConfigKey& key, const StatsdConfig& config);

		/**
		* Remove saved configs from disk.
		*/
		void remove_saved_configs(const ConfigKey& key);

		/**
		* The Configs that have been set. Each config should
		@@ -112,6 +115,11 @@ private:
		* The ConfigListeners that will be told about changes.
		*/
		vector<sp<ConfigListener>> mListeners;

		/**
		* Call to load the saved configs from disk.
		*/
		void readConfigFromDisk();
		};

		} // namespace statsd