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Add functions to handle idle maintenance

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runIdleMaint is equivalent with:

1. echo 1 > /sys/fs/f2fs/sdX/gc_urgent
2. wait until /sys/fs/f2fs/sdX/dirty_segments
     <= threshold or timeout
3. echo 0 > /sys/fs/f2fs/sdX/gc_urgent
4. fstrim

abortIdleMaint forces the wait loop above to exit and
skips fstrim. However, if fstrim is already running,
abortIdleMaint will just leave it run to completion.

Test: adb shell sm idle-maint [run|abort]
Bug: 67776637
Change-Id: I4adff8d9b6bbd63bce41368cea55dc9e9b117eb6
This commit is contained in:
Jin Qian 2017-10-17 15:41:45 -07:00
parent a087947490
commit a370c14f75
6 changed files with 220 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

196
IdleMaint.cpp
View file

@ -17,7 +17,12 @@
#include "IdleMaint.h"
#include "Utils.h"
#include "VolumeManager.h"
#include "model/PrivateVolume.h"
#include <thread>
#include <android-base/chrono_utils.h>
#include <android-base/file.h>
#include <android-base/stringprintf.h>
#include <android-base/logging.h>
#include <fs_mgr.h>
@ -31,26 +36,60 @@
#include <sys/wait.h>
#include <fcntl.h>
using android::base::Basename;
using android::base::ReadFileToString;
using android::base::Realpath;
using android::base::StringPrintf;
using android::base::Timer;
using android::base::WriteStringToFile;
namespace android {
namespace vold {
static const char* kWakeLock = "IdleMaint";
enum class PathTypes {
kMountPoint = 1,
kBlkDevice,
};
static void addFromVolumeManager(std::list<std::string>* paths) {
enum class IdleMaintStats {
kStopped = 1,
kRunning,
kAbort,
};
static const char* kWakeLock = "IdleMaint";
static const int DIRTY_SEGMENTS_THRESHOLD = 100;
static const int GC_TIMEOUT_SEC = 480;
static IdleMaintStats idle_maint_stat(IdleMaintStats::kStopped);
static std::condition_variable cv_abort, cv_stop;
static std::mutex cv_m;
static void addFromVolumeManager(std::list<std::string>* paths,
PathTypes path_type) {
VolumeManager* vm = VolumeManager::Instance();
std::list<std::string> privateIds;
vm->listVolumes(VolumeBase::Type::kPrivate, privateIds);
for (const auto& id : privateIds) {
auto vol = vm->findVolume(id);
PrivateVolume* vol = static_cast<PrivateVolume*>(vm->findVolume(id).get());
if (vol != nullptr && vol->getState() == VolumeBase::State::kMounted) {
paths->push_back(vol->getPath());
if (path_type == PathTypes::kMountPoint) {
paths->push_back(vol->getPath());
} else if (path_type == PathTypes::kBlkDevice) {
std::string gc_path;
const std::string& fs_type = vol->getFsType();
if (fs_type == "f2fs" &&
Realpath(vol->getRawDevPath(), &gc_path)) {
paths->push_back(std::string("/sys/fs/") + fs_type +
"/" + Basename(gc_path));
}
}
}
}
}
static void addFromFstab(std::list<std::string>* paths) {
static void addFromFstab(std::list<std::string>* paths, PathTypes path_type) {
std::unique_ptr<fstab, decltype(&fs_mgr_free_fstab)> fstab(fs_mgr_read_fstab_default(),
fs_mgr_free_fstab);
struct fstab_rec *prev_rec = NULL;
@ -79,7 +118,17 @@ static void addFromFstab(std::list<std::string>* paths) {
continue;
}
paths->push_back(fstab->recs[i].mount_point);
if (path_type == PathTypes::kMountPoint) {
paths->push_back(fstab->recs[i].mount_point);
} else if (path_type == PathTypes::kBlkDevice) {
std::string gc_path;
if (std::string(fstab->recs[i].fs_type) == "f2fs" &&
Realpath(fstab->recs[i].blk_device, &gc_path)) {
paths->push_back(std::string("/sys/fs/") + fstab->recs[i].fs_type +
"/" + Basename(gc_path));
}
}
prev_rec = &fstab->recs[i];
}
}
@ -89,8 +138,8 @@ void Trim(const android::sp<android::os::IVoldTaskListener>& listener) {
// Collect both fstab and vold volumes
std::list<std::string> paths;
addFromFstab(&paths);
addFromVolumeManager(&paths);
addFromFstab(&paths, PathTypes::kMountPoint);
addFromVolumeManager(&paths, PathTypes::kMountPoint);
for (const auto& path : paths) {
LOG(DEBUG) << "Starting trim of " << path;
@ -138,5 +187,136 @@ void Trim(const android::sp<android::os::IVoldTaskListener>& listener) {
release_wake_lock(kWakeLock);
}
static bool waitForGc(const std::list<std::string>& paths) {
std::unique_lock<std::mutex> lk(cv_m, std::defer_lock);
bool stop = false, aborted = false;
Timer timer;
while (!stop && !aborted) {
stop = true;
for (const auto& path : paths) {
std::string dirty_segments;
if (!ReadFileToString(path + "/dirty_segments", &dirty_segments)) {
PLOG(WARNING) << "Reading dirty_segments failed in " << path;
continue;
}
if (std::stoi(dirty_segments) > DIRTY_SEGMENTS_THRESHOLD) {
stop = false;
break;
}
}
if (stop) break;
if (timer.duration() >= std::chrono::seconds(GC_TIMEOUT_SEC)) {
LOG(WARNING) << "GC timeout";
break;
}
lk.lock();
aborted = cv_abort.wait_for(lk, 10s, []{
return idle_maint_stat == IdleMaintStats::kAbort;});
lk.unlock();
}
return aborted;
}
static int startGc(const std::list<std::string>& paths) {
for (const auto& path : paths) {
LOG(DEBUG) << "Start GC on " << path;
if (!WriteStringToFile("1", path + "/gc_urgent")) {
PLOG(WARNING) << "Start GC failed on " << path;
}
}
return android::OK;
}
static int stopGc(const std::list<std::string>& paths) {
for (const auto& path : paths) {
LOG(DEBUG) << "Stop GC on " << path;
if (!WriteStringToFile("0", path + "/gc_urgent")) {
PLOG(WARNING) << "Stop GC failed on " << path;
}
}
return android::OK;
}
int RunIdleMaint(const android::sp<android::os::IVoldTaskListener>& listener) {
std::unique_lock<std::mutex> lk(cv_m);
if (idle_maint_stat != IdleMaintStats::kStopped) {
LOG(DEBUG) << "idle maintenance is already running";
if (listener) {
android::os::PersistableBundle extras;
listener->onFinished(0, extras);
}
return android::OK;
}
idle_maint_stat = IdleMaintStats::kRunning;
lk.unlock();
LOG(DEBUG) << "idle maintenance started";
acquire_wake_lock(PARTIAL_WAKE_LOCK, kWakeLock);
std::list<std::string> paths;
addFromFstab(&paths, PathTypes::kBlkDevice);
addFromVolumeManager(&paths, PathTypes::kBlkDevice);
startGc(paths);
bool gc_aborted = waitForGc(paths);
stopGc(paths);
lk.lock();
idle_maint_stat = IdleMaintStats::kStopped;
lk.unlock();
cv_stop.notify_one();
if (!gc_aborted) {
Trim(nullptr);
}
if (listener) {
android::os::PersistableBundle extras;
listener->onFinished(0, extras);
}
LOG(DEBUG) << "idle maintenance completed";
release_wake_lock(kWakeLock);
return android::OK;
}
int AbortIdleMaint(const android::sp<android::os::IVoldTaskListener>& listener) {
acquire_wake_lock(PARTIAL_WAKE_LOCK, kWakeLock);
std::unique_lock<std::mutex> lk(cv_m);
if (idle_maint_stat != IdleMaintStats::kStopped) {
idle_maint_stat = IdleMaintStats::kAbort;
lk.unlock();
cv_abort.notify_one();
lk.lock();
LOG(DEBUG) << "aborting idle maintenance";
cv_stop.wait(lk, []{
return idle_maint_stat == IdleMaintStats::kStopped;});
}
lk.unlock();
if (listener) {
android::os::PersistableBundle extras;
listener->onFinished(0, extras);
}
release_wake_lock(kWakeLock);
LOG(DEBUG) << "idle maintenance stopped";
return android::OK;
}
} // namespace vold
} // namespace android

2
IdleMaint.h
View file

@ -23,6 +23,8 @@ namespace android {
namespace vold {
void Trim(const android::sp<android::os::IVoldTaskListener>& listener);
int RunIdleMaint(const android::sp<android::os::IVoldTaskListener>& listener);
int AbortIdleMaint(const android::sp<android::os::IVoldTaskListener>& listener);
} // namespace vold
} // namespace android

22
VoldNativeService.cpp
View file

@ -481,6 +481,28 @@ binder::Status VoldNativeService::fstrim(int32_t fstrimFlags,
return ok();
}
binder::Status VoldNativeService::runIdleMaint(
const android::sp<android::os::IVoldTaskListener>& listener) {
ENFORCE_UID(AID_SYSTEM);
ACQUIRE_LOCK;
std::thread([=]() {
android::vold::RunIdleMaint(listener);
}).detach();
return ok();
}
binder::Status VoldNativeService::abortIdleMaint(
const android::sp<android::os::IVoldTaskListener>& listener) {
ENFORCE_UID(AID_SYSTEM);
ACQUIRE_LOCK;
std::thread([=]() {
android::vold::AbortIdleMaint(listener);
}).detach();
return ok();
}
binder::Status VoldNativeService::mountAppFuse(int32_t uid, int32_t pid, int32_t mountId,
android::base::unique_fd* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);

4
VoldNativeService.h
View file

@ -66,6 +66,10 @@ public:
binder::Status fstrim(int32_t fstrimFlags,
const android::sp<android::os::IVoldTaskListener>& listener);
binder::Status runIdleMaint(
const android::sp<android::os::IVoldTaskListener>& listener);
binder::Status abortIdleMaint(
const android::sp<android::os::IVoldTaskListener>& listener);
binder::Status mountAppFuse(int32_t uid, int32_t pid, int32_t mountId,
android::base::unique_fd* _aidl_return);

2
binder/android/os/IVold.aidl
View file

@ -54,6 +54,8 @@ interface IVold {
void destroyObb(@utf8InCpp String volId);
void fstrim(int fstrimFlags, IVoldTaskListener listener);
void runIdleMaint(IVoldTaskListener listener);
void abortIdleMaint(IVoldTaskListener listener);
FileDescriptor mountAppFuse(int uid, int pid, int mountId);
void unmountAppFuse(int uid, int pid, int mountId);

2
model/PrivateVolume.h
View file

@ -39,6 +39,8 @@ class PrivateVolume : public VolumeBase {
public:
PrivateVolume(dev_t device, const std::string& keyRaw);
virtual ~PrivateVolume();
const std::string& getFsType() { return mFsType; };
const std::string& getRawDevPath() { return mRawDevPath; };
protected:
status_t doCreate() override;