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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "TrimTask.h"
#include "Benchmark.h"
#include "Utils.h"
#include "VolumeManager.h"
#include "ResponseCode.h"
#include <android-base/stringprintf.h>
#include <android-base/logging.h>
#include <cutils/properties.h>
#include <fs_mgr.h>
#include <private/android_filesystem_config.h>
#include <hardware_legacy/power.h>
#include <dirent.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <fcntl.h>
/* From a would-be kernel header */
#define FIDTRIM _IOWR('f', 128, struct fstrim_range) /* Deep discard trim */
#define BENCHMARK_ENABLED 1
using android::base::StringPrintf;
namespace android {
namespace vold {
static const char* kWakeLock = "TrimTask";
TrimTask::TrimTask(int flags) : mFlags(flags) {
// Collect both fstab and vold volumes
addFromFstab();
VolumeManager* vm = VolumeManager::Instance();
std::list<std::string> privateIds;
vm->listVolumes(VolumeBase::Type::kPrivate, privateIds);
for (auto id : privateIds) {
auto vol = vm->findVolume(id);
if (vol != nullptr && vol->getState() == VolumeBase::State::kMounted) {
mPaths.push_back(vol->getPath());
}
}
}
TrimTask::~TrimTask() {
}
void TrimTask::addFromFstab() {
struct fstab *fstab;
struct fstab_rec *prev_rec = NULL;
fstab = fs_mgr_read_fstab(android::vold::DefaultFstabPath().c_str());
for (int i = 0; i < fstab->num_entries; i++) {
/* Skip raw partitions */
if (!strcmp(fstab->recs[i].fs_type, "emmc") ||
!strcmp(fstab->recs[i].fs_type, "mtd")) {
continue;
}
/* Skip read-only filesystems */
if (fstab->recs[i].flags & MS_RDONLY) {
continue;
}
if (fs_mgr_is_voldmanaged(&fstab->recs[i])) {
continue; /* Should we trim fat32 filesystems? */
}
if (fs_mgr_is_notrim(&fstab->recs[i])) {
continue;
}
/* Skip the multi-type partitions, which are required to be following each other.
* See fs_mgr.c's mount_with_alternatives().
*/
if (prev_rec && !strcmp(prev_rec->mount_point, fstab->recs[i].mount_point)) {
continue;
}
mPaths.push_back(fstab->recs[i].mount_point);
prev_rec = &fstab->recs[i];
}
fs_mgr_free_fstab(fstab);
}
void TrimTask::start() {
mThread = std::thread(&TrimTask::run, this);
}
static void notifyResult(const std::string& path, int64_t bytes, int64_t delta) {
std::string res(path
+ " " + std::to_string(bytes)
+ " " + std::to_string(delta));
VolumeManager::Instance()->getBroadcaster()->sendBroadcast(
ResponseCode::TrimResult, res.c_str(), false);
}
void TrimTask::run() {
acquire_wake_lock(PARTIAL_WAKE_LOCK, kWakeLock);
for (auto path : mPaths) {
LOG(DEBUG) << "Starting trim of " << path;
int fd = open(path.c_str(), O_RDONLY | O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW);
if (fd < 0) {
PLOG(WARNING) << "Failed to open " << path;
continue;
}
struct fstrim_range range;
memset(&range, 0, sizeof(range));
range.len = ULLONG_MAX;
nsecs_t start = systemTime(SYSTEM_TIME_BOOTTIME);
if (ioctl(fd, (mFlags & Flags::kDeepTrim) ? FIDTRIM : FITRIM, &range)) {
PLOG(WARNING) << "Trim failed on " << path;
notifyResult(path, -1, -1);
} else {
nsecs_t delta = systemTime(SYSTEM_TIME_BOOTTIME) - start;
LOG(INFO) << "Trimmed " << range.len << " bytes on " << path
<< " in " << nanoseconds_to_milliseconds(delta) << "ms";
notifyResult(path, range.len, delta);
}
close(fd);
if (mFlags & Flags::kBenchmarkAfter) {
#if BENCHMARK_ENABLED
BenchmarkPrivate(path);
#else
LOG(DEBUG) << "Benchmark disabled";
#endif
}
}
release_wake_lock(kWakeLock);
}
} // namespace vold
} // namespace android
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