mirror of
https://github.com/Evolution-X/hardware_interfaces
synced 2026-02-01 11:36:00 +00:00
9c160b61fe
Create a new library, libhealth_storage_impl_common, that's useful for common health storage HAL implementation. Test: TH Change-Id: I07c51d0b9c2e2262bf327dc3deabc7b41c89355d
119 lines
3.4 KiB
C++
119 lines
3.4 KiB
C++
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <health-storage-impl/common.h>
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#include <android-base/chrono_utils.h>
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#include <android-base/file.h>
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#include <android-base/logging.h>
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#include <android-base/strings.h>
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#include <fstab/fstab.h>
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using ::android::base::ReadFileToString;
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using ::android::base::Timer;
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using ::android::base::Trim;
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using ::android::base::WriteStringToFd;
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using ::android::base::WriteStringToFile;
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using ::android::fs_mgr::Fstab;
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using ::android::fs_mgr::ReadDefaultFstab;
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using ::android::hardware::health::storage::V1_0::Result;
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namespace android::hardware::health::storage {
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static std::string GetGarbageCollectPath() {
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Fstab fstab;
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ReadDefaultFstab(&fstab);
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for (const auto& entry : fstab) {
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if (!entry.sysfs_path.empty()) {
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return entry.sysfs_path + "/manual_gc";
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}
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}
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return "";
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}
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Result GarbageCollect(uint64_t timeout_seconds) {
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std::string path = GetGarbageCollectPath();
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if (path.empty()) {
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LOG(WARNING) << "Cannot find Dev GC path";
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return Result::UNKNOWN_ERROR;
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}
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Result result = Result::SUCCESS;
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Timer timer;
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LOG(INFO) << "Start Dev GC on " << path;
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while (1) {
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std::string require;
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if (!ReadFileToString(path, &require)) {
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PLOG(WARNING) << "Reading manual_gc failed in " << path;
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result = Result::IO_ERROR;
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break;
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}
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require = Trim(require);
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if (require == "" || require == "off" || require == "disabled") {
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LOG(DEBUG) << "No more to do Dev GC";
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break;
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}
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LOG(DEBUG) << "Trigger Dev GC on " << path;
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if (!WriteStringToFile("1", path)) {
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PLOG(WARNING) << "Start Dev GC failed on " << path;
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result = Result::IO_ERROR;
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break;
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}
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if (timer.duration() >= std::chrono::seconds(timeout_seconds)) {
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LOG(WARNING) << "Dev GC timeout";
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// Timeout is not treated as an error. Try next time.
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break;
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}
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sleep(2);
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}
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LOG(INFO) << "Stop Dev GC on " << path;
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if (!WriteStringToFile("0", path)) {
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PLOG(WARNING) << "Stop Dev GC failed on " << path;
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result = Result::IO_ERROR;
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}
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return result;
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}
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void DebugDump(int fd) {
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std::stringstream output;
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std::string path = GetGarbageCollectPath();
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if (path.empty()) {
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output << "Cannot find Dev GC path";
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} else {
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std::string require;
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if (ReadFileToString(path, &require)) {
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output << path << ":" << require << std::endl;
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}
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if (WriteStringToFile("0", path)) {
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output << "stop success" << std::endl;
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}
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}
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if (!WriteStringToFd(output.str(), fd)) {
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PLOG(WARNING) << "debug: cannot write to fd";
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}
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fsync(fd);
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}
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} // namespace android::hardware::health::storage
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