470 lines
23 KiB
Python
470 lines
23 KiB
Python
# disk_operations.py
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import subprocess
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import logging
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import re
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import os
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from PySide6.QtWidgets import QMessageBox, QInputDialog
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from PySide6.QtCore import QObject, Signal, QThread
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from system_info import SystemInfoManager
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logger = logging.getLogger(__name__)
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# --- 后台格式化工作线程 ---
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class FormatWorker(QObject):
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# 定义信号，用于向主线程发送格式化结果
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finished = Signal(bool, str, str, str) # 成功状态, 设备路径, 标准输出, 标准错误
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started = Signal(str) # 设备路径
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def __init__(self, device_path, fs_type, execute_shell_command_func, parent=None):
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super().__init__(parent)
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self.device_path = device_path
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self.fs_type = fs_type
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self._execute_shell_command_func = execute_shell_command_func
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def run(self):
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"""
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在单独线程中执行格式化命令。
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"""
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self.started.emit(self.device_path)
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logger.info(f"后台格式化开始: 设备 {self.device_path}, 文件系统 {self.fs_type}")
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command_list = []
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if self.fs_type == "ext4":
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command_list = ["mkfs.ext4", "-F", self.device_path] # -F 强制执行
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elif self.fs_type == "xfs":
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command_list = ["mkfs.xfs", "-f", self.device_path] # -f 强制执行
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elif self.fs_type == "ntfs":
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command_list = ["mkfs.ntfs", "-f", self.device_path] # -f 强制执行
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elif self.fs_type == "fat32":
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command_list = ["mkfs.vfat", "-F", "32", self.device_path] # -F 32 指定FAT32
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else:
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logger.error(f"不支持的文件系统类型: {self.fs_type}")
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self.finished.emit(False, self.device_path, "", f"不支持的文件系统类型: {self.fs_type}")
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return
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# 调用传入的shell命令执行函数，并禁用其内部的QMessageBox显示
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success, stdout, stderr = self._execute_shell_command_func(
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command_list,
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f"格式化设备 {self.device_path} 为 {self.fs_type} 失败",
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root_privilege=True,
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show_dialog=False # 阻止工作线程弹出 QMessageBox
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)
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self.finished.emit(success, self.device_path, stdout, stderr)
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logger.info(f"后台格式化完成: 设备 {self.device_path}, 成功: {success}")
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class DiskOperations(QObject): # 继承 QObject 以便发出信号
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# 定义信号，用于通知主线程格式化操作的开始和结束
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formatting_finished = Signal(bool, str, str, str) # 成功状态, 设备路径, 标准输出, 标准错误
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formatting_started = Signal(str) # 设备路径
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def __init__(self, system_manager: SystemInfoManager, lvm_ops, parent=None):
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super().__init__(parent)
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self.system_manager = system_manager
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self._lvm_ops = lvm_ops # 保存 LvmOperations 实例，以便调用其 _execute_shell_command
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self.active_format_workers = {} # 用于跟踪正在运行的格式化线程
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# DiskOperations 内部的 _execute_shell_command 只是对 LvmOperations._execute_shell_command 的包装
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# 这样所有 shell 命令都通过 LvmOperations 的统一入口，可以控制 show_dialog
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def _execute_shell_command(self, command_list, error_message, root_privilege=True,
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suppress_critical_dialog_on_stderr_match=None, input_data=None,
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show_dialog=True):
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return self._lvm_ops._execute_shell_command(
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command_list, error_message, root_privilege, suppress_critical_dialog_on_stderr_match, input_data, show_dialog
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)
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def _add_to_fstab(self, device_path, mount_point, fstype, uuid):
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"""
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将设备的挂载信息添加到 /etc/fstab。
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使用 UUID 识别设备以提高稳定性。
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"""
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if not uuid or not mount_point or not fstype:
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logger.error(f"无法将设备 {device_path} 添加到 fstab：缺少 UUID/挂载点/文件系统类型。")
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QMessageBox.warning(None, "警告", f"无法将设备 {device_path} 添加到 fstab：缺少 UUID/挂载点/文件系统类型。")
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return False
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fstab_entry = f"UUID={uuid} {mount_point} {fstype} defaults 0 2"
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fstab_path = "/etc/fstab"
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try:
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# 检查 fstab 中是否已存在相同 UUID 的条目
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with open(fstab_path, 'r') as f:
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fstab_content = f.readlines()
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for line in fstab_content:
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if f"UUID={uuid}" in line:
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logger.warning(f"设备 {device_path} (UUID={uuid}) 已存在于 fstab 中。跳过添加。")
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QMessageBox.information(None, "信息", f"设备 {device_path} (UUID={uuid}) 已存在于 fstab 中。")
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return True # 认为成功，因为目标已达成
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# 如果不存在，则追加到 fstab
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success, _, stderr = self._execute_shell_command(
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["sh", "-c", f"echo '{fstab_entry}' >> {fstab_path}"],
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f"将 {device_path} 添加到 {fstab_path} 失败",
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root_privilege=True
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)
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if success:
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logger.info(f"已将 {fstab_entry} 添加到 {fstab_path}。")
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QMessageBox.information(None, "成功", f"设备 {device_path} 已成功添加到 /etc/fstab。")
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return True
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else:
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return False # Error handled by _execute_shell_command
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except Exception as e:
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logger.error(f"处理 {fstab_path} 失败: {e}")
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QMessageBox.critical(None, "错误", f"处理 {fstab_path} 失败: {e}")
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return False
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def _remove_fstab_entry(self, device_path):
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"""
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从 /etc/fstab 中移除指定设备的条目。
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此方法需要 SystemInfoManager 来获取设备的 UUID。
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"""
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device_details = self.system_manager.get_device_details_by_path(device_path)
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if not device_details or not device_details.get('uuid'):
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logger.warning(f"无法获取设备 {device_path} 的 UUID，无法从 fstab 中移除。")
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return False
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uuid = device_details.get('uuid')
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fstab_path = "/etc/fstab"
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command = ["sed", "-i", f"/{re.escape(uuid)}/d", fstab_path] # Use re.escape for UUID
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success, _, stderr = self._execute_shell_command(
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command,
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f"从 {fstab_path} 中删除 UUID={uuid} 的条目失败",
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root_privilege=True,
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suppress_critical_dialog_on_stderr_match=(
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f"sed: {fstab_path}: No such file or directory", # English
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f"sed: {fstab_path}: 没有那个文件或目录", # Chinese
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"no changes were made" # if sed finds nothing to delete
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)
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)
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if success:
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logger.info(f"已从 {fstab_path} 中删除 UUID={uuid} 的条目。")
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return True
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else:
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if any(s in stderr for s in (
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f"sed: {fstab_path}: No such file or directory",
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f"sed: {fstab_path}: 没有那个文件或目录",
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"no changes were made",
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"No such file or directory" # more general check
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)):
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logger.info(f"fstab 中未找到 UUID={uuid} 的条目，无需删除。")
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return True
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return False
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def mount_partition(self, device_path, mount_point, add_to_fstab=False):
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"""
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挂载指定设备到指定挂载点。
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:param device_path: 要挂载的设备路径。
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:param mount_point: 挂载点。
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:param add_to_fstab: 是否添加到 /etc/fstab。
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:return: True 如果成功，否则 False。
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"""
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if not os.path.exists(mount_point):
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try:
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os.makedirs(mount_point)
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logger.info(f"创建挂载点目录: {mount_point}")
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except OSError as e:
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QMessageBox.critical(None, "错误", f"创建挂载点目录 {mount_point} 失败: {e}")
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logger.error(f"创建挂载点目录 {mount_point} 失败: {e}")
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return False
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logger.info(f"尝试挂载设备 {device_path} 到 {mount_point}。")
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success, _, stderr = self._execute_shell_command(
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["mount", device_path, mount_point],
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f"挂载设备 {device_path} 失败"
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)
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if success:
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QMessageBox.information(None, "成功", f"设备 {device_path} 已成功挂载到 {mount_point}。")
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if add_to_fstab:
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device_details = self.system_manager.get_device_details_by_path(device_path)
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if device_details:
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fstype = device_details.get('fstype')
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uuid = device_details.get('uuid')
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if fstype and uuid:
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self._add_to_fstab(device_path, mount_point, fstype, uuid)
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else:
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logger.error(f"无法获取设备 {device_path} 的文件系统类型或 UUID 以添加到 fstab。")
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QMessageBox.warning(None, "警告", f"设备 {device_path} 已挂载，但无法获取文件系统类型或 UUID 以添加到 fstab。")
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else:
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logger.error(f"无法获取设备 {device_path} 的详细信息以添加到 fstab。")
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QMessageBox.warning(None, "警告", f"设备 {device_path} 已挂载，但无法获取详细信息以添加到 fstab。")
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return True
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else:
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return False
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def unmount_partition(self, device_path, show_dialog_on_error=True):
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"""
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卸载指定设备。
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:param device_path: 要卸载的设备路径。
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:param show_dialog_on_error: 是否在发生错误时显示对话框。
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:return: True 如果成功，否则 False。
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"""
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logger.info(f"尝试卸载设备 {device_path}。")
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already_unmounted_errors = ("not mounted", "未挂载", "未指定挂载点")
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success, _, stderr = self._execute_shell_command(
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["umount", device_path],
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f"卸载设备 {device_path} 失败",
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suppress_critical_dialog_on_stderr_match=already_unmounted_errors,
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show_dialog=show_dialog_on_error
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)
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if success:
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QMessageBox.information(None, "成功", f"设备 {device_path} 已成功卸载。")
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return True
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else:
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is_already_unmounted_error = any(s in stderr for s in already_unmounted_errors)
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if is_already_unmounted_error:
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logger.info(f"设备 {device_path} 已经处于未挂载状态（或挂载点未指定），无需重复卸载。")
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return True
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else:
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return False
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def get_disk_free_space_info_mib(self, disk_path, total_disk_mib):
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"""
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获取磁盘上最大的空闲空间块的起始位置 (MiB) 和大小 (MiB)。
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:param disk_path: 磁盘路径。
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:param total_disk_mib: 磁盘的总大小 (MiB)，用于全新磁盘的计算。
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:return: (start_mib, size_mib) 元组。如果磁盘是全新的，返回 (0.0, total_disk_mib)。
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如果磁盘有分区表但没有空闲空间，返回 (None, None)。
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"""
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logger.debug(f"尝试获取磁盘 {disk_path} 的空闲空间信息 (MiB)。")
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success, stdout, stderr = self._execute_shell_command(
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["parted", "-s", disk_path, "unit", "MiB", "print", "free"],
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f"获取磁盘 {disk_path} 分区信息失败",
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root_privilege=True,
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suppress_critical_dialog_on_stderr_match=("无法辨识的磁盘卷标", "unrecognized disk label")
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)
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if not success:
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logger.error(f"获取磁盘 {disk_path} 空闲空间信息失败: {stderr}")
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return None, None
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logger.debug(f"parted print free 命令原始输出:\n{stdout}")
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free_spaces = []
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lines = stdout.splitlines()
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free_space_line_pattern = re.compile(r'^\s*(\d+\.?\d*)MiB\s+(\d+\.?\d*)MiB\s+(\d+\.?\d*)MiB\s+(?:Free Space|空闲空间|可用空间)')
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for line in lines:
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match = free_space_line_pattern.match(line)
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if match:
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try:
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start_mib = float(match.group(1))
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size_mib = float(match.group(3))
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free_spaces.append({'start_mib': start_mib, 'size_mib': size_mib})
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except ValueError as ve:
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logger.warning(f"解析 parted free space 行 '{line}' 失败: {ve}")
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continue
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if not free_spaces:
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logger.warning(f"在磁盘 {disk_path} 上未找到空闲空间。")
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return None, None
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largest_free_space = max(free_spaces, key=lambda x: x['size_mib'])
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start_mib = largest_free_space['start_mib']
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size_mib = largest_free_space['size_mib']
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logger.debug(f"磁盘 {disk_path} 的最大空闲空间块起始于 {start_mib:.2f} MiB，大小为 {size_mib:.2f} MiB。")
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return start_mib, size_mib
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def create_partition(self, disk_path, partition_table_type, size_gb, total_disk_mib, use_max_space):
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"""
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在指定磁盘上创建分区。
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:param disk_path: 磁盘路径 (例如 /dev/sdb)。
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:param partition_table_type: 分区表类型 ('gpt' 或 'msdos')。
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:param size_gb: 分区大小 (GB)。
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:param total_disk_mib: 磁盘总大小 (MiB)。
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:param use_max_space: 是否使用最大可用空间。
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:return: True 如果成功，否则 False。
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"""
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if not isinstance(disk_path, str) or not isinstance(partition_table_type, str):
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logger.error(f"尝试创建分区时传入无效参数。磁盘路径: {disk_path}, 分区表类型: {partition_table_type}")
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QMessageBox.critical(None, "错误", "无效的磁盘路径或分区表类型。")
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return False
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# 1. 检查磁盘是否有分区表
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has_partition_table = False
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success_check, stdout_check, stderr_check = self._execute_shell_command(
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["parted", "-s", disk_path, "print"],
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f"检查磁盘 {disk_path} 分区表失败",
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suppress_critical_dialog_on_stderr_match=("无法辨识的磁盘卷标", "unrecognized disk label"),
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root_privilege=True
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)
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if not success_check:
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if any(s in stderr_check for s in ("无法辨识的磁盘卷标", "unrecognized disk label")):
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logger.info(f"磁盘 {disk_path} 没有可识别的分区表。")
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has_partition_table = False
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else:
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logger.error(f"检查磁盘 {disk_path} 分区表时发生非预期的错误: {stderr_check}")
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return False
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else:
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if "Partition Table: unknown" not in stdout_check and "分区表：unknown" not in stdout_check:
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has_partition_table = True
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else:
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logger.info(f"parted print 报告磁盘 {disk_path} 的分区表为 'unknown'。")
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has_partition_table = False
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actual_start_mib_for_parted = 0.0
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# 2. 如果没有分区表，则创建分区表
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if not has_partition_table:
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reply = QMessageBox.question(None, "确认创建分区表",
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f"磁盘 {disk_path} 没有分区表。您确定要创建 {partition_table_type} 分区表吗？"
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f"此操作将擦除磁盘上的所有数据。",
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QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
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if reply == QMessageBox.No:
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logger.info(f"用户取消了在 {disk_path} 上创建分区表的操作。")
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return False
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logger.info(f"尝试在 {disk_path} 上创建 {partition_table_type} 分区表。")
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success, _, stderr = self._execute_shell_command(
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["parted", "-s", disk_path, "mklabel", partition_table_type],
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f"创建 {partition_table_type} 分区表失败"
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)
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if not success:
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return False
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actual_start_mib_for_parted = 1.0
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else:
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# 如果有分区表，获取下一个可用分区的起始位置
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start_mib_from_parted, _ = self.get_disk_free_space_info_mib(disk_path, total_disk_mib)
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if start_mib_from_parted is None:
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QMessageBox.critical(None, "错误", f"无法确定磁盘 {disk_path} 的分区起始位置或没有空闲空间。")
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return False
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if start_mib_from_parted < 1.0:
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actual_start_mib_for_parted = 1.0
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else:
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actual_start_mib_for_parted = start_mib_from_parted
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# 3. 确定分区结束位置
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if use_max_space:
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end_pos = "100%"
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size_for_log = "最大可用空间"
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else:
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end_mib = actual_start_mib_for_parted + size_gb * 1024
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if end_mib > total_disk_mib:
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QMessageBox.warning(None, "警告", f"请求的分区大小 ({size_gb}GB) 超出了可用空间。将调整为最大可用空间。")
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end_pos = "100%"
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size_for_log = "最大可用空间"
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else:
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end_pos = f"{end_mib}MiB"
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size_for_log = f"{size_gb}GB"
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# 4. 创建分区
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create_cmd = ["parted", "-s", disk_path, "mkpart", "primary", f"{actual_start_mib_for_parted}MiB", end_pos]
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logger.info(f"尝试在 {disk_path} 上创建 {size_for_log} 的主分区。命令: {' '.join(create_cmd)}")
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||
success, _, stderr = self._execute_shell_command(
|
||
create_cmd,
|
||
f"在 {disk_path} 上创建分区失败"
|
||
)
|
||
if success:
|
||
QMessageBox.information(None, "成功", f"在 {disk_path} 上成功创建了 {size_for_log} 的分区。")
|
||
return True
|
||
else:
|
||
return False
|
||
|
||
def delete_partition(self, device_path):
|
||
"""
|
||
删除指定分区。
|
||
:param device_path: 要删除的分区路径。
|
||
:return: True 如果成功，否则 False。
|
||
"""
|
||
reply = QMessageBox.question(None, "确认删除分区",
|
||
f"您确定要删除分区 {device_path} 吗？此操作将擦除分区上的所有数据！",
|
||
QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
|
||
if reply == QMessageBox.No:
|
||
logger.info(f"用户取消了删除分区 {device_path} 的操作。")
|
||
return False
|
||
|
||
# 尝试卸载分区
|
||
self.unmount_partition(device_path, show_dialog_on_error=False)
|
||
|
||
# 从 fstab 中移除条目
|
||
self._remove_fstab_entry(device_path)
|
||
|
||
# 获取父磁盘和分区号
|
||
match = re.match(r'(/dev/[a-z]+)(\d+)', device_path)
|
||
if not match:
|
||
QMessageBox.critical(None, "错误", f"无法解析设备路径 {device_path}。")
|
||
logger.error(f"无法解析设备路径 {device_path}。")
|
||
return False
|
||
|
||
disk_path = match.group(1)
|
||
partition_number = match.group(2)
|
||
|
||
logger.info(f"尝试删除分区 {device_path} (磁盘: {disk_path}, 分区号: {partition_number})。")
|
||
success, _, stderr = self._execute_shell_command(
|
||
["parted", "-s", disk_path, "rm", partition_number],
|
||
f"删除分区 {device_path} 失败"
|
||
)
|
||
if success:
|
||
QMessageBox.information(None, "成功", f"分区 {device_path} 已成功删除。")
|
||
return True
|
||
else:
|
||
return False
|
||
|
||
def format_partition(self, device_path, fstype=None):
|
||
"""
|
||
启动一个 QInputDialog 让用户选择文件系统类型，然后将格式化操作提交到后台线程。
|
||
:param device_path: 要格式化的分区路径。
|
||
:param fstype: 文件系统类型 (例如 'ext4', 'xfs', 'fat32', 'ntfs')。如果为 None，则弹出对话框让用户选择。
|
||
:return: True 如果成功启动后台任务，否则 False。
|
||
"""
|
||
if fstype is None:
|
||
items = ("ext4", "xfs", "fat32", "ntfs")
|
||
fstype, ok = QInputDialog.getItem(None, "选择文件系统", f"请选择要使用的文件系统类型 for {device_path}:", items, 0, False)
|
||
if not ok or not fstype:
|
||
logger.info("用户取消了文件系统选择。")
|
||
return False
|
||
|
||
reply = QMessageBox.question(None, "确认格式化",
|
||
f"您确定要格式化设备 {device_path} 为 {fstype} 吗？此操作将擦除所有数据！",
|
||
QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
|
||
if reply == QMessageBox.No:
|
||
logger.info(f"用户取消了格式化 {device_path} 的操作。")
|
||
return False
|
||
|
||
# 检查是否已有格式化任务正在进行
|
||
if device_path in self.active_format_workers:
|
||
QMessageBox.warning(None, "警告", f"设备 {device_path} 正在格式化中，请勿重复操作。")
|
||
return False
|
||
|
||
# 尝试卸载分区（静默，不弹对话框）
|
||
self.unmount_partition(device_path, show_dialog_on_error=False)
|
||
# 从 fstab 中移除条目 (因为格式化会改变 UUID)
|
||
self._remove_fstab_entry(device_path)
|
||
|
||
# 创建 QThread 和 FormatWorker 实例
|
||
thread = QThread()
|
||
worker = FormatWorker(device_path, fstype, self._execute_shell_command)
|
||
worker.moveToThread(thread)
|
||
|
||
# 连接信号和槽
|
||
thread.started.connect(worker.run)
|
||
worker.finished.connect(lambda s, dp, o, e: self._on_formatting_finished(s, dp, o, e))
|
||
worker.finished.connect(thread.quit)
|
||
worker.finished.connect(worker.deleteLater)
|
||
thread.finished.connect(thread.deleteLater)
|
||
|
||
self.active_format_workers[device_path] = thread
|
||
self.formatting_started.emit(device_path)
|
||
thread.start()
|
||
|
||
QMessageBox.information(None, "开始格式化", f"设备 {device_path} 正在后台格式化为 {fstype}。完成后将通知您。")
|
||
return True
|
||
|
||
def _on_formatting_finished(self, success, device_path, stdout, stderr):
|
||
"""
|
||
处理格式化工作线程完成后的结果。此槽函数在主线程中执行。
|
||
"""
|
||
if device_path in self.active_format_workers:
|
||
del self.active_format_workers[device_path]
|
||
|
||
if success:
|
||
QMessageBox.information(None, "格式化成功", f"设备 {device_path} 已成功格式化。")
|
||
else:
|
||
QMessageBox.critical(None, "格式化失败", f"格式化设备 {device_path} 失败。\n错误详情: {stderr}")
|
||
|
||
self.formatting_finished.emit(success, device_path, stdout, stderr)
|