1 /*
2  * Copyright (C) 2023 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.server.recoverysystem.hal;
18 
19 import android.hardware.boot.IBootControl;
20 import android.hardware.boot.V1_0.CommandResult;
21 import android.os.IBinder;
22 import android.os.RemoteException;
23 import android.util.Slog;
24 
25 public class BootControlHIDL implements IBootControl {
26     private static final String TAG = "BootControlHIDL";
27 
28     final android.hardware.boot.V1_0.IBootControl v1_hal;
29     final android.hardware.boot.V1_1.IBootControl v1_1_hal;
30     final android.hardware.boot.V1_2.IBootControl v1_2_hal;
31 
isServicePresent()32     public static boolean isServicePresent() {
33         try {
34             android.hardware.boot.V1_0.IBootControl.getService(true);
35         } catch (RemoteException e) {
36             return false;
37         }
38         return true;
39     }
40 
isV1_2ServicePresent()41     public static boolean isV1_2ServicePresent() {
42         try {
43             android.hardware.boot.V1_2.IBootControl.getService(true);
44         } catch (RemoteException e) {
45             return false;
46         }
47         return true;
48     }
49 
getService()50     public static BootControlHIDL getService() throws RemoteException {
51         android.hardware.boot.V1_0.IBootControl v1_hal =
52                 android.hardware.boot.V1_0.IBootControl.getService(true);
53         android.hardware.boot.V1_1.IBootControl v1_1_hal =
54                 android.hardware.boot.V1_1.IBootControl.castFrom(v1_hal);
55         android.hardware.boot.V1_2.IBootControl v1_2_hal =
56                 android.hardware.boot.V1_2.IBootControl.castFrom(v1_hal);
57         return new BootControlHIDL(v1_hal, v1_1_hal, v1_2_hal);
58     }
59 
BootControlHIDL(android.hardware.boot.V1_0.IBootControl v1_hal, android.hardware.boot.V1_1.IBootControl v1_1_hal, android.hardware.boot.V1_2.IBootControl v1_2_hal)60     private BootControlHIDL(android.hardware.boot.V1_0.IBootControl v1_hal,
61             android.hardware.boot.V1_1.IBootControl v1_1_hal,
62             android.hardware.boot.V1_2.IBootControl v1_2_hal) throws RemoteException {
63         this.v1_hal = v1_hal;
64         this.v1_1_hal = v1_1_hal;
65         this.v1_2_hal = v1_2_hal;
66         if (v1_hal == null) {
67             throw new RemoteException("Failed to find V1.0 BootControl HIDL");
68         }
69         if (v1_2_hal != null) {
70             Slog.i(TAG, "V1.2 version of BootControl HIDL HAL available, using V1.2");
71         } else if (v1_1_hal != null) {
72             Slog.i(TAG, "V1.1 version of BootControl HIDL HAL available, using V1.1");
73         } else {
74             Slog.i(TAG, "V1.0 version of BootControl HIDL HAL available, using V1.0");
75         }
76     }
77 
78     @Override
asBinder()79     public IBinder asBinder() {
80         return null;
81     }
82 
83     @Override
getActiveBootSlot()84     public int getActiveBootSlot() throws RemoteException {
85         if (v1_2_hal == null) {
86             throw new RemoteException("getActiveBootSlot() requires V1.2 BootControl HAL");
87         }
88         return v1_2_hal.getActiveBootSlot();
89     }
90 
91     @Override
getCurrentSlot()92     public int getCurrentSlot() throws RemoteException {
93         return v1_hal.getCurrentSlot();
94     }
95 
96     @Override
getNumberSlots()97     public int getNumberSlots() throws RemoteException {
98         return v1_hal.getNumberSlots();
99     }
100 
101     @Override
getSnapshotMergeStatus()102     public int getSnapshotMergeStatus() throws RemoteException {
103         if (v1_1_hal == null) {
104             throw new RemoteException("getSnapshotMergeStatus() requires V1.1 BootControl HAL");
105         }
106         return v1_1_hal.getSnapshotMergeStatus();
107     }
108 
109     @Override
getSuffix(int slot)110     public String getSuffix(int slot) throws RemoteException {
111         return v1_hal.getSuffix(slot);
112     }
113 
114     @Override
isSlotBootable(int slot)115     public boolean isSlotBootable(int slot) throws RemoteException {
116         int ret = v1_hal.isSlotBootable(slot);
117         if (ret == -1) {
118             throw new RemoteException(
119                     "isSlotBootable() failed, Slot %d might be invalid.".formatted(slot));
120         }
121         return ret != 0;
122     }
123 
124     @Override
isSlotMarkedSuccessful(int slot)125     public boolean isSlotMarkedSuccessful(int slot) throws RemoteException {
126         int ret = v1_hal.isSlotMarkedSuccessful(slot);
127         if (ret == -1) {
128             throw new RemoteException(
129                     "isSlotMarkedSuccessful() failed, Slot %d might be invalid.".formatted(slot));
130         }
131         return ret != 0;
132     }
133 
134     @Override
markBootSuccessful()135     public void markBootSuccessful() throws RemoteException {
136         CommandResult res = v1_hal.markBootSuccessful();
137         if (!res.success) {
138             throw new RemoteException("Error markBootSuccessful() " + res.errMsg);
139         }
140     }
141 
142     @Override
setActiveBootSlot(int slot)143     public void setActiveBootSlot(int slot) throws RemoteException {
144         CommandResult res = v1_hal.setActiveBootSlot(slot);
145         if (!res.success) {
146             throw new RemoteException("Error setActiveBootSlot(%d) %s".formatted(slot, res.errMsg));
147         }
148     }
149 
150     @Override
setSlotAsUnbootable(int slot)151     public void setSlotAsUnbootable(int slot) throws RemoteException {
152         CommandResult res = v1_hal.setSlotAsUnbootable(slot);
153         if (!res.success) {
154             throw new RemoteException(
155                     "Error setSlotAsUnbootable(%d) %s".formatted(slot, res.errMsg));
156         }
157     }
158 
159     @Override
setSnapshotMergeStatus(int status)160     public void setSnapshotMergeStatus(int status) throws RemoteException {
161         if (v1_1_hal == null) {
162             throw new RemoteException("getSnapshotMergeStatus() requires V1.1 BootControl HAL");
163         }
164         if (!v1_1_hal.setSnapshotMergeStatus(status)) {
165             throw new RemoteException("Error setSnapshotMergeStatus(%d)".formatted(status));
166         }
167     }
168 
169     @Override
getInterfaceVersion()170     public int getInterfaceVersion() throws RemoteException {
171         return 1;
172     }
173 
174     @Override
getInterfaceHash()175     public String getInterfaceHash() throws RemoteException {
176         return v1_hal.interfaceDescriptor();
177     }
178 }
179