1d6fbcc389
When requested, kick off a thread that will migrate storage contents between two locations. This is performed in several steps that also interact with the framework: 1. Take old and new volumes offline during migration 2. Wipe new location clean (10% of progress) 3. Copy files from old to new (60% of progress) 4. Inform framework that move was successful so it can persist 5. Wipe old location clean (15% of progress) Derives a hacky progress estimate by using a rough proxy of free disk space changes while a cp/rm is taking place. Add new internal path for direct access to volumes to bypass any FUSE emulation overhead, and send it to framework. Remove mutex around various exec calls since setexeccon() is already per-thread. Bug: 19993667 Change-Id: Ibcb4f6fe0126d05b2365f316f53e71dc3e79a2b8
87 lines
3.1 KiB
C++
87 lines
3.1 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.
|
|
*/
|
|
|
|
#ifndef ANDROID_VOLD_UTILS_H
|
|
#define ANDROID_VOLD_UTILS_H
|
|
|
|
#include <utils/Errors.h>
|
|
#include <selinux/selinux.h>
|
|
|
|
#include <vector>
|
|
#include <string>
|
|
|
|
// DISALLOW_COPY_AND_ASSIGN disallows the copy and operator= functions. It goes in the private:
|
|
// declarations in a class.
|
|
#if !defined(DISALLOW_COPY_AND_ASSIGN)
|
|
#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
|
|
TypeName(const TypeName&) = delete; \
|
|
void operator=(const TypeName&) = delete
|
|
#endif
|
|
|
|
namespace android {
|
|
namespace vold {
|
|
|
|
/* SELinux contexts used depending on the block device type */
|
|
extern security_context_t sBlkidContext;
|
|
extern security_context_t sBlkidUntrustedContext;
|
|
extern security_context_t sFsckContext;
|
|
extern security_context_t sFsckUntrustedContext;
|
|
|
|
status_t CreateDeviceNode(const std::string& path, dev_t dev);
|
|
status_t DestroyDeviceNode(const std::string& path);
|
|
|
|
/* fs_prepare_dir wrapper that creates with SELinux context */
|
|
status_t PrepareDir(const std::string& path, mode_t mode, uid_t uid, gid_t gid);
|
|
|
|
/* Really unmounts the path, killing active processes along the way */
|
|
status_t ForceUnmount(const std::string& path);
|
|
|
|
/* Creates bind mount from source to target */
|
|
status_t BindMount(const std::string& source, const std::string& target);
|
|
|
|
/* Reads filesystem metadata from device at path */
|
|
status_t ReadMetadata(const std::string& path, std::string& fsType,
|
|
std::string& fsUuid, std::string& fsLabel);
|
|
|
|
/* Reads filesystem metadata from untrusted device at path */
|
|
status_t ReadMetadataUntrusted(const std::string& path, std::string& fsType,
|
|
std::string& fsUuid, std::string& fsLabel);
|
|
|
|
/* Returns either WEXITSTATUS() status, or a negative errno */
|
|
status_t ForkExecvp(const std::vector<std::string>& args);
|
|
status_t ForkExecvp(const std::vector<std::string>& args, security_context_t context);
|
|
|
|
status_t ForkExecvp(const std::vector<std::string>& args,
|
|
std::vector<std::string>& output);
|
|
status_t ForkExecvp(const std::vector<std::string>& args,
|
|
std::vector<std::string>& output, security_context_t context);
|
|
|
|
pid_t ForkExecvpAsync(const std::vector<std::string>& args);
|
|
|
|
status_t ReadRandomBytes(size_t bytes, std::string& out);
|
|
|
|
/* Converts hex string to raw bytes, ignoring [ :-] */
|
|
status_t HexToStr(const std::string& hex, std::string& str);
|
|
/* Converts raw bytes to hex string */
|
|
status_t StrToHex(const std::string& str, std::string& hex);
|
|
|
|
uint64_t GetFreeBytes(const std::string& path);
|
|
uint64_t GetTreeBytes(const std::string& path);
|
|
|
|
} // namespace vold
|
|
} // namespace android
|
|
|
|
#endif
|