123 lines
3.9 KiB
C++
123 lines
3.9 KiB
C++
//
|
|
// Copyright (C) 2019 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.
|
|
//
|
|
|
|
#pragma once
|
|
|
|
#include <string>
|
|
|
|
#include <android-base/file.h>
|
|
#include <android-base/strings.h>
|
|
|
|
namespace android {
|
|
namespace gsi {
|
|
|
|
static constexpr char kGsiServiceName[] = "gsiservice";
|
|
|
|
#define DSU_METADATA_PREFIX "/metadata/gsi/dsu/"
|
|
|
|
// These files need to be globally readable so that fs_mgr_fstab, which is
|
|
// statically linked into processes, can return consistent result for non-root
|
|
// processes:
|
|
// * kDsuActiveFile
|
|
// * kGsiBootedIndicatorFile
|
|
// * kGsiLpNamesFile
|
|
// * DsuMetadataKeyDirFile(slot)
|
|
|
|
static constexpr char kGsiBootedIndicatorFile[] = DSU_METADATA_PREFIX "booted";
|
|
|
|
static constexpr char kGsiLpNamesFile[] = DSU_METADATA_PREFIX "lp_names";
|
|
|
|
static constexpr char kDsuActiveFile[] = DSU_METADATA_PREFIX "active";
|
|
|
|
static constexpr char kDsuAvbKeyDir[] = DSU_METADATA_PREFIX "avb/";
|
|
|
|
static constexpr char kDsuMetadataKeyDirPrefix[] = "/metadata/vold/metadata_encryption/dsu/";
|
|
|
|
static constexpr char kDsuSDPrefix[] = "/mnt/media_rw/";
|
|
|
|
static inline std::string DsuLpMetadataFile(const std::string& dsu_slot) {
|
|
return DSU_METADATA_PREFIX + dsu_slot + "/lp_metadata";
|
|
}
|
|
|
|
static inline std::string DsuInstallDirFile(const std::string& dsu_slot) {
|
|
return DSU_METADATA_PREFIX + dsu_slot + "/install_dir";
|
|
}
|
|
|
|
static inline std::string DsuMetadataKeyDirFile(const std::string& dsu_slot) {
|
|
return DSU_METADATA_PREFIX + dsu_slot + "/metadata_encryption_dir";
|
|
}
|
|
|
|
static inline std::string DefaultDsuMetadataKeyDir(const std::string& dsu_slot) {
|
|
return kDsuMetadataKeyDirPrefix + dsu_slot;
|
|
}
|
|
|
|
static inline std::string GetDsuMetadataKeyDir(const std::string& dsu_slot) {
|
|
auto key_dir_file = DsuMetadataKeyDirFile(dsu_slot);
|
|
std::string key_dir;
|
|
if (android::base::ReadFileToString(key_dir_file, &key_dir) &&
|
|
android::base::StartsWith(key_dir, kDsuMetadataKeyDirPrefix)) {
|
|
return key_dir;
|
|
}
|
|
return DefaultDsuMetadataKeyDir(dsu_slot);
|
|
}
|
|
|
|
// install_dir "/data/gsi/dsu/dsu" has a slot name "dsu"
|
|
// install_dir "/data/gsi/dsu/dsu2" has a slot name "dsu2"
|
|
std::string GetDsuSlot(const std::string& install_dir);
|
|
|
|
static constexpr char kGsiBootedProp[] = "ro.gsid.image_running";
|
|
|
|
static constexpr char kGsiInstalledProp[] = "gsid.image_installed";
|
|
|
|
static constexpr char kDsuPostfix[] = "_gsi";
|
|
|
|
inline constexpr char kDsuScratch[] = "scratch_gsi";
|
|
inline constexpr char kDsuUserdata[] = "userdata_gsi";
|
|
|
|
static constexpr int kMaxBootAttempts = 1;
|
|
|
|
// Get the currently active dsu slot
|
|
// Return true on success
|
|
static inline bool GetActiveDsu(std::string* active_dsu) {
|
|
return android::base::ReadFileToString(kDsuActiveFile, active_dsu);
|
|
}
|
|
|
|
// Returns true if the currently running system image is a live GSI.
|
|
bool IsGsiRunning();
|
|
|
|
// Return true if a GSI is installed (but not necessarily running).
|
|
bool IsGsiInstalled();
|
|
|
|
// Set the GSI as no longer bootable. This effectively removes the GSI. If no
|
|
// GSI was bootable, false is returned.
|
|
bool UninstallGsi();
|
|
|
|
// Set the GSI as no longer bootable, without removing its installed files.
|
|
bool DisableGsi();
|
|
|
|
// Returns true if init should attempt to boot into a live GSI image, false
|
|
// otherwise. If false, an error message is set.
|
|
//
|
|
// This is only called by first-stage init.
|
|
bool CanBootIntoGsi(std::string* error);
|
|
|
|
// Called by first-stage init to indicate that we're about to boot into a
|
|
// GSI.
|
|
bool MarkSystemAsGsi();
|
|
|
|
} // namespace gsi
|
|
} // namespace android
|