40ab6742a7
- Also update vold to create sandboxes for secondary storage devices.
- Since bind mounts are created in the process specific namespaces, we
don't need /mnt/storage anymore which we were using it to prevent
some bind mounts from propagating onto /mnt/runtime/write.
- Create bind mounts for {media,obb} dirs similar to data dir in
per process namespace.
- Also fix a bug where we are not passing correct packages to vold when
a new user starts.
Bug: 111890351
Test: manual
Change-Id: I7849efc4fbf3c654606fa30de7ab2de0236d766f
140 lines
5.1 KiB
C++
140 lines
5.1 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_VOLD_UTILS_H
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#define ANDROID_VOLD_UTILS_H
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#include "KeyBuffer.h"
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#include <android-base/macros.h>
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#include <cutils/multiuser.h>
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#include <selinux/selinux.h>
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#include <utils/Errors.h>
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#include <string>
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#include <vector>
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struct DIR;
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namespace android {
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namespace vold {
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/* SELinux contexts used depending on the block device type */
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extern security_context_t sBlkidContext;
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extern security_context_t sBlkidUntrustedContext;
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extern security_context_t sFsckContext;
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extern security_context_t sFsckUntrustedContext;
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// TODO remove this with better solution, b/64143519
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extern bool sSleepOnUnmount;
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status_t CreateDeviceNode(const std::string& path, dev_t dev);
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status_t DestroyDeviceNode(const std::string& path);
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/* fs_prepare_dir wrapper that creates with SELinux context */
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status_t PrepareDir(const std::string& path, mode_t mode, uid_t uid, gid_t gid);
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/* Really unmounts the path, killing active processes along the way */
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status_t ForceUnmount(const std::string& path);
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/* Kills any processes using given path */
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status_t KillProcessesUsingPath(const std::string& path);
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/* Creates bind mount from source to target */
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status_t BindMount(const std::string& source, const std::string& target);
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bool FindValue(const std::string& raw, const std::string& key, std::string* value);
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/* Reads filesystem metadata from device at path */
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status_t ReadMetadata(const std::string& path, std::string* fsType, std::string* fsUuid,
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std::string* fsLabel);
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/* Reads filesystem metadata from untrusted device at path */
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status_t ReadMetadataUntrusted(const std::string& path, std::string* fsType, std::string* fsUuid,
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std::string* fsLabel);
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/* Returns either WEXITSTATUS() status, or a negative errno */
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status_t ForkExecvp(const std::vector<std::string>& args);
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status_t ForkExecvp(const std::vector<std::string>& args, security_context_t context);
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status_t ForkExecvp(const std::vector<std::string>& args, std::vector<std::string>& output);
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status_t ForkExecvp(const std::vector<std::string>& args, std::vector<std::string>& output,
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security_context_t context);
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pid_t ForkExecvpAsync(const std::vector<std::string>& args);
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/* Gets block device size in bytes */
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status_t GetBlockDevSize(int fd, uint64_t* size);
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status_t GetBlockDevSize(const std::string& path, uint64_t* size);
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/* Gets block device size in 512 byte sectors */
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status_t GetBlockDev512Sectors(const std::string& path, uint64_t* nr_sec);
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status_t ReadRandomBytes(size_t bytes, std::string& out);
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status_t ReadRandomBytes(size_t bytes, char* buffer);
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status_t GenerateRandomUuid(std::string& out);
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/* Converts hex string to raw bytes, ignoring [ :-] */
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status_t HexToStr(const std::string& hex, std::string& str);
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/* Converts raw bytes to hex string */
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status_t StrToHex(const std::string& str, std::string& hex);
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/* Converts raw key bytes to hex string */
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status_t StrToHex(const KeyBuffer& str, KeyBuffer& hex);
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/* Normalize given hex string into consistent format */
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status_t NormalizeHex(const std::string& in, std::string& out);
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uint64_t GetFreeBytes(const std::string& path);
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uint64_t GetTreeBytes(const std::string& path);
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bool IsFilesystemSupported(const std::string& fsType);
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/* Wipes contents of block device at given path */
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status_t WipeBlockDevice(const std::string& path);
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std::string BuildKeyPath(const std::string& partGuid);
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std::string BuildDataSystemLegacyPath(userid_t userid);
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std::string BuildDataSystemCePath(userid_t userid);
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std::string BuildDataSystemDePath(userid_t userid);
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std::string BuildDataMiscLegacyPath(userid_t userid);
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std::string BuildDataMiscCePath(userid_t userid);
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std::string BuildDataMiscDePath(userid_t userid);
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std::string BuildDataProfilesDePath(userid_t userid);
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std::string BuildDataVendorCePath(userid_t userid);
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std::string BuildDataVendorDePath(userid_t userid);
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std::string BuildDataPath(const std::string& volumeUuid);
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std::string BuildDataMediaCePath(const std::string& volumeUuid, userid_t userid);
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std::string BuildDataUserCePath(const std::string& volumeUuid, userid_t userid);
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std::string BuildDataUserDePath(const std::string& volumeUuid, userid_t userid);
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dev_t GetDevice(const std::string& path);
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status_t RestoreconRecursive(const std::string& path);
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// TODO: promote to android::base
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bool Readlinkat(int dirfd, const std::string& path, std::string* result);
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/* Checks if Android is running in QEMU */
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bool IsRunningInEmulator();
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status_t UnmountTree(const std::string& prefix);
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status_t DeleteDirContentsAndDir(const std::string& pathname);
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} // namespace vold
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} // namespace android
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#endif
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