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yhkylin-backup-tools
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yhkylin-backup-tools/backup-daemon/udisksystemrestoreproxy.cpp

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#include "udisksystemrestoreproxy.h"
#include <QDateTime>
#include <QDir>
#include <QDebug>
#include <QTimer>
#include <unistd.h>
#include <sys/reboot.h>
#include "../common/utils.h"
#include "mymountproxy.h"
#include "myprocess/mksquashfsprocess.h"
IMPLEMENT_DYNCREATE(UDiskSystemRestoreProxy)
/**
* @brief 构造函数
*/
UDiskSystemRestoreProxy::UDiskSystemRestoreProxy()
{
m_isFinished = false;
m_p = nullptr;
}
/**
* @brief 析构函数
*/
UDiskSystemRestoreProxy::~UDiskSystemRestoreProxy()
{
delete m_p;
}
/**
* @brief 环境检测
* @return false,检测失败;true,检测成功
*/
bool UDiskSystemRestoreProxy::checkEnvEx()
{
qDebug() << "UDiskSystemRestoreProxy::checkEnvEx invoke begin";
// 1、检测.user.txt是否存在
m_userFile = m_backupWrapper.m_prefixDestPath + BACKUP_SNAPSHOTS_PATH + "/" + m_backupWrapper.m_uuid + "/" + PATHS_USER_FILE;
m_userFile.replace("//", "/");
if (!Utils::filsExists(m_userFile)) {
qCritical(".user.txt文件不存在");
emit checkResult(int(BackupResult::WRITE_BACKUP_PATHS_TO_USER_FAILED));
return false;
}
// 2、检测.exclude.user.txt是否存在
m_excludeUserFile = m_backupWrapper.m_prefixDestPath + BACKUP_SNAPSHOTS_PATH + "/" + m_backupWrapper.m_uuid + "/" + EXCLUDE_PATHS_USER_FILE;
m_excludeUserFile.replace("//", "/");
if (!Utils::filsExists(m_excludeUserFile)) {
qCritical(".exclude.user.txt文件不存在");
emit checkResult(int(BackupResult::WRITE_EXCLUDE_BACKUP_PATHS_TO_USER_FAILED));
return false;
}
// 3、检测还原点是否存在
m_backupPath = m_backupWrapper.m_prefixDestPath + BACKUP_SNAPSHOTS_PATH + "/" + m_backupWrapper.m_uuid + "/data";
m_backupPath.replace("//", "/");
if (Utils::isDirEmpty(m_backupPath)) {
qCritical("还原点{uuid}/data目录不存在");
emit checkResult(int(BackupResult::INC_NOT_FOUND_DIR));
return false;
}
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emit checkResult(int(BackupResult::CHECK_ENV_SUCCESS));
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qDebug() << "UDiskSystemRestoreProxy::checkEnvEx invoke end";
return true;
}
/**
* @brief 执行还原逻辑
*/
void UDiskSystemRestoreProxy::doWorkEx()
{
qDebug() << "UDiskSystemRestoreProxy::doWorkEx invoke begin";
// 1、校验
if (!checkEnvEx())
return ;
// 2、还原efi(兼容旧版本的备份)
if (!restoreEfi()) {
qCritical("/boot/efi目录同步失败");
emit checkResult(int(BackupResult::EFI_RSYNC_FAIL));
return ;
}
// 3、还原系统
if (doPrepare())
restoreSystem();
qDebug() << "UDiskSystemRestoreProxy::doWorkEx invoke end";
}
/**
* @brief 还原efi(兼容旧版本的备份)
* @return
*/
bool UDiskSystemRestoreProxy::restoreEfi()
{
qDebug() << "UDiskSystemRestoreProxy::restoreEfi invoke begin";
// 是否有/boot/efi目录
QString efiPath = Utils::getSysRootPath() + "/boot/efi";
efiPath.replace("//", "/");
if (!Utils::isDirEmpty(efiPath)) {
// 1、修复源数据
repairEfi();
// 2、重新rw读写挂载
remountEfi();
// 3、同步efi
return rsyncEfi();
}
qDebug() << "UDiskSystemRestoreProxy::restoreEfi invoke end";
return true;
}
/**
* @brief 修复efi目录
*/
void UDiskSystemRestoreProxy::repairEfi()
{
QString qsEfiPath = m_backupPath + "/efi";
if (!Utils::isDirEmpty(qsEfiPath)) {
// 存在/efi说明是老备份数据，尽量修正老数据
QStringList args;
args << "-f";
args << qsEfiPath;
QString newPath = m_backupPath + "/boot";
args << newPath;
QProcess::execute("mv", args);
}
}
/**
* @brief 重新rw读写挂载efi分区
*/
void UDiskSystemRestoreProxy::remountEfi()
{
QString mountPath = Utils::getSysRootPath() + "/boot/efi";
mountPath.replace("//", "/");
QStringList args;
args << "-o"
<< "rw,remount"
<< mountPath;
QProcess::execute("mount", args);
}
/**
* @brief 重新rw读写挂载boot分区
*/
void UDiskSystemRestoreProxy::remountBoot()
{
QString mountPath = Utils::getSysRootPath() + "/boot";
mountPath.replace("//", "/");
QStringList args;
args << "-o"
<< "rw,remount"
<< mountPath;
QProcess::execute("mount", args);
}
/**
* @brief 同步efi
*/
bool UDiskSystemRestoreProxy::rsyncEfi()
{
QString efiPath = m_backupPath + "/boot/efi/";
if (Utils::isDirEmpty(efiPath))
efiPath = efiPath = m_backupPath + "/efi/";
if (Utils::isDirEmpty(efiPath))
return true;
QStringList args = getRsyncArgs(SystemRestoreScene::EFI_RESTORE);
QString mountPath = Utils::getSysRootPath() + "/boot/efi/";
mountPath.replace("//", "/");
args << efiPath << mountPath;
m_p = new RsyncPathToDirProcess(this);
bool result = m_p->start(args);
delete m_p;
m_p = nullptr;
return result;
}
/**
* @brief 根据场景获取rsync命令参数
* @param scene，场景
* @return 组装好的rsync的参数信息
*/
QStringList UDiskSystemRestoreProxy::getRsyncArgs(SystemRestoreScene scene)
{
QStringList args;
args << "-avAHXr";
args << "--info=progress2";
args << "--no-inc-recursive";
args << "--ignore-missing-args";
args << "--delete";
QDir dataDir(m_srcPath + "/data");
QFile file(m_srcPath + "/etc/uid_list");
QDir efiDir(m_srcPath + "/boot/efi");
QStringList excludes;
switch (scene) {
case SystemRestoreScene::SYSTEM_RESTORE :
// 还原工具不还原自身
args << "--exclude=/usr/bin/backup-daemon";
args << "--exclude=/usr/bin/kybackup";
args << "--exclude=/usr/bin/mount_fstab_efi";
args << "--exclude=/usr/bin/backup-auto-efi";
args << "--exclude=/usr/bin/backup-auto";
args << "--exclude=/usr/bin/rsync";
args << "--exclude=/usr/share/rsync";
args << "--exclude=/usr/share/initramfs-tools/hooks/kybackup-hooks";
args << "--exclude=/usr/share/initramfs-tools/scripts/local-bottom/kybackup";
// 以前的出厂备份和grub备份没有备份/data，还原时需要判断/data是否存在，如不存在需要屏蔽掉，不然会将主机上的/data删除，造成问题
// 此为兼容以前备份的老数据而改，等以后老的备份估计不存在了可已去掉
if (!dataDir.exists()) {
args << "--exclude=/data";
}
if (!file.exists()) {
args << "--exclude=/etc/uid_list";
}
// 为兼容以前的老备份数据，增加下面几行
if (efiDir.isEmpty()) {
args << QString("--exclude=/boot/efi");
}
// 系统安装后有的会将/data/home /data/root挂载到的/home /root上，实际文件是存放在/data/home /data/root下面
Utils::excludeFstabBindPath(excludes);
for (const QString& item : excludes) {
QDir itemDir(m_srcPath + item);
// 以后统一用/home /root这种路径， 兼容老备份数据（原来的U盘备份，在mksquashfs时排除bind挂载的任意一方时，都备份不上）
if (item == "/data/home") {
QDir homeDir(m_srcPath + "/home");
if (!homeDir.isEmpty()) {
args << QString("--exclude=/data/home");
} else if (!itemDir.isEmpty()) {
args << QString("--exclude=/home");
} else {
args << QString("--exclude=/data/home");
args << QString("--exclude=/home");
}
continue;
} else if (item == "/data/root") {
QDir homeDir(m_srcPath + "/root");
if (!homeDir.isEmpty()) {
args << QString("--exclude=/data/root");
} else if (!itemDir.isEmpty()) {
args << QString("--exclude=/root");
} else {
args << QString("--exclude=/data/root");
args << QString("--exclude=/root");
}
continue;
}
args << QString("--exclude=") + item;
}
args << "--exclude-from" << m_excludeUserFile;
args << "--files-from" << m_userFile;
break ;
case SystemRestoreScene::EFI_RESTORE :
break ;
default:
return args;
}
return args;
}
/**
* @brief 还原前准备
* @return
*/
bool UDiskSystemRestoreProxy::doPrepare()
{
// 移动设备系统备份如果有img，则需要先将img挂载到/backup/imgbackup目录
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QString imgPath = m_backupPath + "/" + UDISK_MKSQUASHFS_IMG_NAME;
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if (Utils::filsExists(imgPath)) {
// 1、检测目录/backup/imgbackup是否存在，不存在则创建此目录
QString dstImgMountPath = Utils::getSysRootPath() + BACKUP_IMGBACKUP_PATH;
dstImgMountPath.replace("//", "/");
Utils::mkpath(dstImgMountPath);
// 2、先卸载/backup/imgbackup上的mount
MountBackupProcess::umount(dstImgMountPath);
// 3、将img文件挂载到/backup/imgbackup上
MountBackupProcess *processMount = new MountBackupProcess;
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if (!processMount->mount(imgPath, dstImgMountPath)) {
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emit checkResult(int(BackupResult::RESTOREDIR_PREPARE_FAILED));
return false;
}
m_srcPath = dstImgMountPath;
} else
m_srcPath = m_backupPath;
// 以读写方式重新挂载boot分区，因为有的机器默认以只读挂载
remountBoot();
return true;
}
/**
* @brief 系统还原
*/
void UDiskSystemRestoreProxy::restoreSystem()
{
QString destPath = Utils::getSysRootPath();
QStringList args = getRsyncArgs(SystemRestoreScene::SYSTEM_RESTORE);
args << m_srcPath + "/";
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destPath += "/";
destPath.replace("//", "/");
args << destPath;
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m_p = new RsyncPathToDirProcess(this);
connect(m_p, &RsyncPathToDirProcess::progress, this, &UDiskSystemRestoreProxy::progress);
connect(m_p, &RsyncPathToDirProcess::finished, this, [&](bool result) {
if (result) {
QString time = QDateTime::currentDateTime().toString("yy-MM-dd hh:mm:ss");
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// Utils::writeBackupLog(time + "," + m_curUuid + "," + QString::number(m_backupWrapper.m_type) + ",,," + QString::number(m_backupWrapper.m_frontUid));
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Utils::writeBackupLog(time + "," + m_curUuid + "," + QString::number(m_backupWrapper.m_type) + ",,,," + m_backupWrapper.m_backupName);
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Utils::updateSyncFile();
QString fileIfSync = Utils::getSysRootPath() + FILE_IF_SYNC;
fileIfSync.replace("//", "/");
QFileInfo file(fileIfSync);
QDateTime beginTime = file.fileTime(QFileDevice::FileModificationTime);
Utils::wait(10);
Utils::updateSyncFile();
while (1) {
Utils::wait(2);
QFileInfo file1(fileIfSync);
QDateTime UpdateTime = file1.fileTime(QFileDevice::FileModificationTime);
if (UpdateTime > beginTime)
break;
}
if (m_backupWrapper.m_isOtherMachine) {
Utils::wait(20);
updateGrubUUid();
sync();
Utils::wait(5);
}
}
if (Utils::isDirEmpty(m_backupPath))
result = false;
emit this->workResult(result);
m_isFinished = true;
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if (result) {
Utils::wait(2);
reboot(RB_AUTOBOOT);
}
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});
QTimer::singleShot(1*1000, this, &UDiskSystemRestoreProxy::checkUdiskExists);
m_isFinished = false;
m_p->start(args, false);
}
/**
* @brief 异机还原时更新grub.cfg中的分区UUID
*/
void UDiskSystemRestoreProxy::updateGrubUUid()
{
QString srcFstab = Utils::getSysRootPath() + BACKUP_IMGBACKUP_PATH;
srcFstab += FSTAB_PATH;
srcFstab.replace("//", "/");
QHash<QString, QString> srcPartToUuid = Utils::getPartUuidMap(srcFstab);
QString destFstab = Utils::getSysRootPath() + FSTAB_PATH;
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destFstab.replace("//", "/");
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QHash<QString, QString> destPartToUuid = Utils::getPartUuidMap(destFstab);
QString findGrub = Utils::executeCmd("find /boot -name grub.cfg");
QStringList grubs = findGrub.split("\n");
for (const QString &grub : grubs) {
if (grub.isEmpty())
continue;
QString root = QString("sed -i 's/%1/%2/g' %3").arg(srcPartToUuid.value("/")).arg(destPartToUuid.value("/")).arg(grub);
qDebug() << Utils::executeCmd(root);
QString boot = QString("sed -i 's/%1/%2/g' %3").arg(srcPartToUuid.value("/boot")).arg(destPartToUuid.value("/boot")).arg(grub);
qDebug() << Utils::executeCmd(boot);
QString swap = QString("sed -i 's/%1/%2/g' %3").arg(srcPartToUuid.value("swap")).arg(destPartToUuid.value("swap")).arg(grub);
qDebug() << Utils::executeCmd(swap);
}
}
/**
* @brief 监控移动设备是否还在
* @return true-在；false-不在
*/
bool UDiskSystemRestoreProxy::checkUdiskExists()
{
if (!m_isFinished) {
if (Utils::isDirEmpty(m_backupPath) && m_p != nullptr)
m_p->stop();
else
QTimer::singleShot(1*1000, this, &UDiskSystemRestoreProxy::checkUdiskExists);
}
return true;
}