200 lines
7.5 KiB
C++
200 lines
7.5 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 "KeyBuffer.h"
|
|
|
|
#include <android-base/macros.h>
|
|
#include <android-base/unique_fd.h>
|
|
#include <cutils/multiuser.h>
|
|
#include <selinux/selinux.h>
|
|
#include <utils/Errors.h>
|
|
|
|
#include <chrono>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
struct DIR;
|
|
|
|
namespace android {
|
|
namespace vold {
|
|
|
|
static const char* kVoldAppDataIsolationEnabled = "persist.sys.vold_app_data_isolation_enabled";
|
|
static const char* kExternalStorageSdcardfs = "external_storage.sdcardfs.enabled";
|
|
|
|
/* 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;
|
|
|
|
// TODO remove this with better solution, b/64143519
|
|
extern bool sSleepOnUnmount;
|
|
|
|
std::string GetFuseMountPathForUser(userid_t user_id, const std::string& relative_upper_path);
|
|
|
|
status_t CreateDeviceNode(const std::string& path, dev_t dev);
|
|
status_t DestroyDeviceNode(const std::string& path);
|
|
|
|
status_t SetDefaultAcl(const std::string& path, mode_t mode, uid_t uid, gid_t gid,
|
|
std::vector<gid_t> additionalGids);
|
|
|
|
status_t AbortFuseConnections();
|
|
|
|
int SetQuotaInherit(const std::string& path);
|
|
int SetQuotaProjectId(const std::string& path, long projectId);
|
|
/*
|
|
* Creates and sets up an application-specific path on external
|
|
* storage with the correct ACL and project ID (if needed).
|
|
*
|
|
* ONLY for use with app-specific data directories on external storage!
|
|
* (eg, /Android/data/com.foo, /Android/obb/com.foo, etc.)
|
|
*/
|
|
int PrepareAppDirFromRoot(const std::string& path, const std::string& root, int appUid,
|
|
bool fixupExisting);
|
|
|
|
/* 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,
|
|
unsigned int attrs = 0);
|
|
|
|
/* Really unmounts the path, killing active processes along the way */
|
|
status_t ForceUnmount(const std::string& path);
|
|
|
|
/* Kills any processes using given path */
|
|
status_t KillProcessesUsingPath(const std::string& path);
|
|
|
|
/* Kills any processes using given mount prifix */
|
|
status_t KillProcessesWithMountPrefix(const std::string& path);
|
|
|
|
/* Creates bind mount from source to target */
|
|
status_t BindMount(const std::string& source, const std::string& target);
|
|
|
|
/** Creates a symbolic link to target */
|
|
status_t Symlink(const std::string& target, const std::string& linkpath);
|
|
|
|
/** Calls unlink(2) at linkpath */
|
|
status_t Unlink(const std::string& linkpath);
|
|
|
|
/** Creates the given directory if it is not already available */
|
|
status_t CreateDir(const std::string& dir, mode_t mode);
|
|
|
|
bool FindValue(const std::string& raw, const std::string& key, std::string* value);
|
|
|
|
/* 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, std::vector<std::string>* output = nullptr,
|
|
security_context_t context = nullptr);
|
|
|
|
pid_t ForkExecvpAsync(const std::vector<std::string>& args);
|
|
|
|
/* Gets block device size in bytes */
|
|
status_t GetBlockDevSize(int fd, uint64_t* size);
|
|
status_t GetBlockDevSize(const std::string& path, uint64_t* size);
|
|
/* Gets block device size in 512 byte sectors */
|
|
status_t GetBlockDev512Sectors(const std::string& path, uint64_t* nr_sec);
|
|
|
|
status_t ReadRandomBytes(size_t bytes, std::string& out);
|
|
status_t ReadRandomBytes(size_t bytes, char* buffer);
|
|
status_t GenerateRandomUuid(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);
|
|
/* Converts raw key bytes to hex string */
|
|
status_t StrToHex(const KeyBuffer& str, KeyBuffer& hex);
|
|
/* Normalize given hex string into consistent format */
|
|
status_t NormalizeHex(const std::string& in, std::string& out);
|
|
|
|
uint64_t GetFreeBytes(const std::string& path);
|
|
uint64_t GetTreeBytes(const std::string& path);
|
|
|
|
bool IsFilesystemSupported(const std::string& fsType);
|
|
bool IsSdcardfsUsed();
|
|
bool IsFuseDaemon(const pid_t pid);
|
|
|
|
/* Wipes contents of block device at given path */
|
|
status_t WipeBlockDevice(const std::string& path);
|
|
|
|
std::string BuildKeyPath(const std::string& partGuid);
|
|
|
|
std::string BuildDataSystemLegacyPath(userid_t userid);
|
|
std::string BuildDataSystemCePath(userid_t userid);
|
|
std::string BuildDataSystemDePath(userid_t userid);
|
|
std::string BuildDataMiscLegacyPath(userid_t userid);
|
|
std::string BuildDataMiscCePath(userid_t userid);
|
|
std::string BuildDataMiscDePath(userid_t userid);
|
|
std::string BuildDataProfilesDePath(userid_t userid);
|
|
std::string BuildDataVendorCePath(userid_t userid);
|
|
std::string BuildDataVendorDePath(userid_t userid);
|
|
|
|
std::string BuildDataPath(const std::string& volumeUuid);
|
|
std::string BuildDataMediaCePath(const std::string& volumeUuid, userid_t userid);
|
|
std::string BuildDataUserCePath(const std::string& volumeUuid, userid_t userid);
|
|
std::string BuildDataUserDePath(const std::string& volumeUuid, userid_t userid);
|
|
|
|
dev_t GetDevice(const std::string& path);
|
|
|
|
bool IsSameFile(const std::string& path1, const std::string& path2);
|
|
|
|
status_t EnsureDirExists(const std::string& path, mode_t mode, uid_t uid, gid_t gid);
|
|
|
|
status_t RestoreconRecursive(const std::string& path);
|
|
|
|
// TODO: promote to android::base
|
|
bool Readlinkat(int dirfd, const std::string& path, std::string* result);
|
|
|
|
// Handles dynamic major assignment for virtio-block
|
|
bool IsVirtioBlkDevice(unsigned int major);
|
|
|
|
status_t UnmountTreeWithPrefix(const std::string& prefix);
|
|
status_t UnmountTree(const std::string& mountPoint);
|
|
|
|
bool IsDotOrDotDot(const struct dirent& ent);
|
|
|
|
status_t DeleteDirContentsAndDir(const std::string& pathname);
|
|
status_t DeleteDirContents(const std::string& pathname);
|
|
|
|
status_t WaitForFile(const char* filename, std::chrono::nanoseconds timeout);
|
|
|
|
bool FsyncDirectory(const std::string& dirname);
|
|
|
|
bool writeStringToFile(const std::string& payload, const std::string& filename);
|
|
|
|
void ConfigureMaxDirtyRatioForFuse(const std::string& fuse_mount, unsigned int max_ratio);
|
|
|
|
void ConfigureReadAheadForFuse(const std::string& fuse_mount, size_t read_ahead_kb);
|
|
|
|
status_t MountUserFuse(userid_t user_id, const std::string& absolute_lower_path,
|
|
const std::string& relative_upper_path, android::base::unique_fd* fuse_fd);
|
|
|
|
status_t UnmountUserFuse(userid_t userId, const std::string& absolute_lower_path,
|
|
const std::string& relative_upper_path);
|
|
|
|
status_t PrepareAndroidDirs(const std::string& volumeRoot);
|
|
} // namespace vold
|
|
} // namespace android
|
|
|
|
#endif
|