cbe69fc060
Long live Binder. Test: yes Bug: 13758960 Change-Id: If6be379b5a873f1b0c66dd1522b87413ad10fc46
261 lines
7.5 KiB
C++
261 lines
7.5 KiB
C++
/*
|
|
* 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 "MoveTask.h"
|
|
#include "Utils.h"
|
|
#include "VolumeManager.h"
|
|
|
|
#include <android-base/stringprintf.h>
|
|
#include <android-base/logging.h>
|
|
#include <private/android_filesystem_config.h>
|
|
#include <hardware_legacy/power.h>
|
|
|
|
#include <dirent.h>
|
|
#include <sys/wait.h>
|
|
|
|
#define CONSTRAIN(amount, low, high) ((amount) < (low) ? (low) : ((amount) > (high) ? (high) : (amount)))
|
|
|
|
#define EXEC_BLOCKING 0
|
|
|
|
using android::base::StringPrintf;
|
|
|
|
namespace android {
|
|
namespace vold {
|
|
|
|
// TODO: keep in sync with PackageManager
|
|
static const int kMoveSucceeded = -100;
|
|
static const int kMoveFailedInternalError = -6;
|
|
|
|
static const char* kCpPath = "/system/bin/cp";
|
|
static const char* kRmPath = "/system/bin/rm";
|
|
|
|
static const char* kWakeLock = "MoveTask";
|
|
|
|
MoveTask::MoveTask(const std::shared_ptr<VolumeBase>& from, const std::shared_ptr<VolumeBase>& to,
|
|
const android::sp<android::os::IVoldTaskListener>& listener) :
|
|
mFrom(from), mTo(to), mListener(listener) {
|
|
}
|
|
|
|
MoveTask::~MoveTask() {
|
|
}
|
|
|
|
void MoveTask::start() {
|
|
mThread = std::thread(&MoveTask::run, this);
|
|
}
|
|
|
|
void MoveTask::notifyProgress(int progress) {
|
|
if (mListener) {
|
|
android::os::PersistableBundle extras;
|
|
mListener->onStatus(progress, extras);
|
|
}
|
|
}
|
|
|
|
static status_t pushBackContents(const std::string& path, std::vector<std::string>& cmd,
|
|
bool addWildcard) {
|
|
DIR* dir = opendir(path.c_str());
|
|
if (dir == NULL) {
|
|
return -1;
|
|
}
|
|
bool found = false;
|
|
struct dirent* ent;
|
|
while ((ent = readdir(dir)) != NULL) {
|
|
if ((!strcmp(ent->d_name, ".")) || (!strcmp(ent->d_name, ".."))) {
|
|
continue;
|
|
}
|
|
if (addWildcard) {
|
|
cmd.push_back(StringPrintf("%s/%s/*", path.c_str(), ent->d_name));
|
|
} else {
|
|
cmd.push_back(StringPrintf("%s/%s", path.c_str(), ent->d_name));
|
|
}
|
|
found = true;
|
|
}
|
|
closedir(dir);
|
|
return found ? OK : -1;
|
|
}
|
|
|
|
status_t MoveTask::execRm(const std::string& path, int startProgress, int stepProgress) {
|
|
notifyProgress(startProgress);
|
|
|
|
uint64_t expectedBytes = GetTreeBytes(path);
|
|
uint64_t startFreeBytes = GetFreeBytes(path);
|
|
|
|
std::vector<std::string> cmd;
|
|
cmd.push_back(kRmPath);
|
|
cmd.push_back("-f"); /* force: remove without confirmation, no error if it doesn't exist */
|
|
cmd.push_back("-R"); /* recursive: remove directory contents */
|
|
if (pushBackContents(path, cmd, true) != OK) {
|
|
LOG(WARNING) << "No contents in " << path;
|
|
return OK;
|
|
}
|
|
|
|
#if EXEC_BLOCKING
|
|
return ForkExecvp(cmd);
|
|
#else
|
|
pid_t pid = ForkExecvpAsync(cmd);
|
|
if (pid == -1) return -1;
|
|
|
|
int status;
|
|
while (true) {
|
|
if (waitpid(pid, &status, WNOHANG) == pid) {
|
|
if (WIFEXITED(status)) {
|
|
LOG(DEBUG) << "Finished rm with status " << WEXITSTATUS(status);
|
|
return (WEXITSTATUS(status) == 0) ? OK : -1;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
sleep(1);
|
|
uint64_t deltaFreeBytes = GetFreeBytes(path) - startFreeBytes;
|
|
notifyProgress(startProgress + CONSTRAIN((int)
|
|
((deltaFreeBytes * stepProgress) / expectedBytes), 0, stepProgress));
|
|
}
|
|
return -1;
|
|
#endif
|
|
}
|
|
|
|
status_t MoveTask::execCp(const std::string& fromPath, const std::string& toPath,
|
|
int startProgress, int stepProgress) {
|
|
notifyProgress(startProgress);
|
|
|
|
uint64_t expectedBytes = GetTreeBytes(fromPath);
|
|
uint64_t startFreeBytes = GetFreeBytes(toPath);
|
|
|
|
if (expectedBytes > startFreeBytes) {
|
|
LOG(ERROR) << "Data size " << expectedBytes << " is too large to fit in free space "
|
|
<< startFreeBytes;
|
|
return -1;
|
|
}
|
|
|
|
std::vector<std::string> cmd;
|
|
cmd.push_back(kCpPath);
|
|
cmd.push_back("-p"); /* preserve timestamps, ownership, and permissions */
|
|
cmd.push_back("-R"); /* recurse into subdirectories (DEST must be a directory) */
|
|
cmd.push_back("-P"); /* Do not follow symlinks [default] */
|
|
cmd.push_back("-d"); /* don't dereference symlinks */
|
|
if (pushBackContents(fromPath, cmd, false) != OK) {
|
|
LOG(WARNING) << "No contents in " << fromPath;
|
|
return OK;
|
|
}
|
|
cmd.push_back(toPath.c_str());
|
|
|
|
#if EXEC_BLOCKING
|
|
return ForkExecvp(cmd);
|
|
#else
|
|
pid_t pid = ForkExecvpAsync(cmd);
|
|
if (pid == -1) return -1;
|
|
|
|
int status;
|
|
while (true) {
|
|
if (waitpid(pid, &status, WNOHANG) == pid) {
|
|
if (WIFEXITED(status)) {
|
|
LOG(DEBUG) << "Finished cp with status " << WEXITSTATUS(status);
|
|
return (WEXITSTATUS(status) == 0) ? OK : -1;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
sleep(1);
|
|
uint64_t deltaFreeBytes = startFreeBytes - GetFreeBytes(toPath);
|
|
notifyProgress(startProgress + CONSTRAIN((int)
|
|
((deltaFreeBytes * stepProgress) / expectedBytes), 0, stepProgress));
|
|
}
|
|
return -1;
|
|
#endif
|
|
}
|
|
|
|
static void bringOffline(const std::shared_ptr<VolumeBase>& vol) {
|
|
vol->destroy();
|
|
vol->setSilent(true);
|
|
vol->create();
|
|
vol->setMountFlags(0);
|
|
vol->mount();
|
|
}
|
|
|
|
static void bringOnline(const std::shared_ptr<VolumeBase>& vol) {
|
|
vol->destroy();
|
|
vol->setSilent(false);
|
|
vol->create();
|
|
}
|
|
|
|
void MoveTask::run() {
|
|
acquire_wake_lock(PARTIAL_WAKE_LOCK, kWakeLock);
|
|
|
|
std::string fromPath;
|
|
std::string toPath;
|
|
|
|
// TODO: add support for public volumes
|
|
if (mFrom->getType() != VolumeBase::Type::kEmulated) goto fail;
|
|
if (mTo->getType() != VolumeBase::Type::kEmulated) goto fail;
|
|
|
|
// Step 1: tear down volumes and mount silently without making
|
|
// visible to userspace apps
|
|
{
|
|
std::lock_guard<std::mutex> lock(VolumeManager::Instance()->getLock());
|
|
bringOffline(mFrom);
|
|
bringOffline(mTo);
|
|
}
|
|
|
|
fromPath = mFrom->getInternalPath();
|
|
toPath = mTo->getInternalPath();
|
|
|
|
// Step 2: clean up any stale data
|
|
if (execRm(toPath, 10, 10) != OK) {
|
|
goto fail;
|
|
}
|
|
|
|
// Step 3: perform actual copy
|
|
if (execCp(fromPath, toPath, 20, 60) != OK) {
|
|
goto copy_fail;
|
|
}
|
|
|
|
// NOTE: MountService watches for this magic value to know
|
|
// that move was successful
|
|
notifyProgress(82);
|
|
{
|
|
std::lock_guard<std::mutex> lock(VolumeManager::Instance()->getLock());
|
|
bringOnline(mFrom);
|
|
bringOnline(mTo);
|
|
}
|
|
|
|
// Step 4: clean up old data
|
|
if (execRm(fromPath, 85, 15) != OK) {
|
|
goto fail;
|
|
}
|
|
|
|
notifyProgress(kMoveSucceeded);
|
|
release_wake_lock(kWakeLock);
|
|
return;
|
|
|
|
copy_fail:
|
|
// if we failed to copy the data we should not leave it laying around
|
|
// in target location. Do not check return value, we can not do any
|
|
// useful anyway.
|
|
execRm(toPath, 80, 1);
|
|
fail:
|
|
{
|
|
std::lock_guard<std::mutex> lock(VolumeManager::Instance()->getLock());
|
|
bringOnline(mFrom);
|
|
bringOnline(mTo);
|
|
}
|
|
notifyProgress(kMoveFailedInternalError);
|
|
release_wake_lock(kWakeLock);
|
|
return;
|
|
}
|
|
|
|
} // namespace vold
|
|
} // namespace android
|