platform_system_vold/Process.h
Zim 75273001a2 Avoid killing the FUSE daemon during unmount
The FUSE daemon is often holding fds on behalf of other apps and if a
volume is ejected the daemon would often get killed first while vold
is walking /proc/<pid>/fd to kill pids with open fds on the
volume. This is required for the volume unmount successfully.

To mitigate this, we avoid killing the FUSE daemon during the usual
/proc walk. This ensures that we first send SIGINT, SIGTERM and
SIGKILL to other apps first. There is an additional SIGKILL attempt
and on that last attempt, we kill the FUSE daemon as a last resort

Test: Manual
Bug: 171673908
Change-Id: I100d2ce4cb4c145cbb49e0696842e97dfba2c1c9
2021-03-05 11:05:16 +00:00

29 lines
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/*
* Copyright (C) 2008 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.
*/
#ifndef _PROCESS_H
#define _PROCESS_H
namespace android {
namespace vold {
int KillProcessesWithOpenFiles(const std::string& path, int signal, bool killFuseDaemon = true);
int KillProcessesWithMounts(const std::string& path, int signal);
} // namespace vold
} // namespace android
#endif