1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "partitionslot_manager.h"
17
18 #include <fcntl.h>
19 #include <unistd.h>
20 #include <linux/limits.h>
21 #include "param_wrapper.h"
22 #include "hilog/log.h"
23
24 #undef LOG_DOMAIN
25 #undef LOG_TAG
26 #define LOG_DOMAIN 0xD002500
27 #define LOG_TAG "hdf_partitionslot_manager"
28
29 namespace OHOS {
30 namespace HDI {
31 namespace Partitionslot {
32 namespace V1_0 {
33
34 constexpr int32_t UPDATE_PARTITION_B = 2;
35
36 constexpr off_t MISC_PARTITION_ACTIVE_SLOT_OFFSET = 1024;
37 constexpr off_t MISC_PARTITION_ACTIVE_SLOT_SIZE = 4;
38
39 constexpr off_t MISC_PARTITION_UNBOOT_SLOT_OFFSET = MISC_PARTITION_ACTIVE_SLOT_OFFSET + MISC_PARTITION_ACTIVE_SLOT_SIZE;
40 constexpr off_t MISC_PARTITION_UNBOOT_SLOT_SIZE = 4;
41
42 #define MISC_DEVICE_NODE "/dev/block/by-name/bootctrl"
43
GetCurrentSlot(int32_t & currentSlot,int32_t & numOfSlots)44 int32_t PartitionSlotManager::GetCurrentSlot(int32_t& currentSlot, int32_t& numOfSlots)
45 {
46 HILOG_DEBUG(LOG_CORE, "%{public}s called!", __func__);
47 numOfSlots = system::GetIntParameter("ohos.boot.bootslots", 1);
48 currentSlot = ReadMisc(MISC_PARTITION_ACTIVE_SLOT_OFFSET, MISC_PARTITION_ACTIVE_SLOT_SIZE);
49 HILOG_INFO(LOG_CORE, "current slot is %{public}d, numOfSlots is %{public}d", currentSlot, numOfSlots);
50 return 0;
51 }
52
GetSlotSuffix(int32_t slot,std::string & suffix)53 int32_t PartitionSlotManager::GetSlotSuffix(int32_t slot, std::string& suffix)
54 {
55 HILOG_DEBUG(LOG_CORE, "%{public}s called!", __func__);
56 if (slot == UPDATE_PARTITION_B) {
57 suffix = "_b";
58 } else {
59 suffix = "_a";
60 }
61 HILOG_INFO(LOG_CORE, "suffix is %{public}s", suffix.c_str());
62 return 0;
63 }
64
SetActiveSlot(int32_t slot)65 int32_t PartitionSlotManager::SetActiveSlot(int32_t slot)
66 {
67 HILOG_DEBUG(LOG_CORE, "%{public}s called!, slot is %{public}d", __func__, slot);
68 return WriteSlotToMisc(slot, MISC_PARTITION_ACTIVE_SLOT_OFFSET, MISC_PARTITION_ACTIVE_SLOT_SIZE);
69 }
70
SetSlotUnbootable(int32_t slot)71 int32_t PartitionSlotManager::SetSlotUnbootable(int32_t slot)
72 {
73 HILOG_DEBUG(LOG_CORE, "%{public}s called!, slot is %{public}d", __func__, slot);
74 return WriteSlotToMisc(slot, MISC_PARTITION_UNBOOT_SLOT_OFFSET, MISC_PARTITION_UNBOOT_SLOT_SIZE);
75 }
76
WriteSlot(int fd,int32_t slot,off_t offset,off_t size)77 int32_t PartitionSlotManager::WriteSlot(int fd, int32_t slot, off_t offset, off_t size)
78 {
79 if (lseek(fd, offset, SEEK_SET) < 0) {
80 HILOG_ERROR(LOG_CORE, "Failed lseek slot %{public}d errno %{public}d", slot, errno);
81 return -1;
82 }
83
84 if (write(fd, &slot, size) != size) {
85 HILOG_ERROR(LOG_CORE, "Write slot failed ");
86 return -1;
87 }
88 return 0;
89 }
90
ReadMisc(off_t offset,off_t size)91 int PartitionSlotManager::ReadMisc(off_t offset, off_t size)
92 {
93 int fd = open(MISC_DEVICE_NODE, O_RDWR | O_CLOEXEC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
94 if (fd < 0) {
95 return -1;
96 }
97 if (lseek(fd, offset, SEEK_SET) < 0) {
98 HILOG_ERROR(LOG_CORE, "Failed lseek miscDevice errno %{public}d ", errno);
99 close(fd);
100 return -1;
101 }
102 int32_t slot = 0;
103 if (read(fd, &slot, size) != size) {
104 HILOG_ERROR(LOG_CORE, "Failed read migic miscDevice errno %{public}d ", errno);
105 close(fd);
106 return -1;
107 }
108 HILOG_INFO(LOG_CORE, "Read slot %{public}d", slot);
109 close(fd);
110 return slot;
111 }
112
WriteSlotToMisc(int32_t slot,off_t offset,off_t size)113 int PartitionSlotManager::WriteSlotToMisc(int32_t slot, off_t offset, off_t size)
114 {
115 if (slot < 0) {
116 HILOG_ERROR(LOG_CORE, "Invalid slot : %{public}d", slot);
117 return -1;
118 }
119 int fd = open(MISC_DEVICE_NODE, O_RDWR | O_CLOEXEC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
120 if (fd < 0) {
121 HILOG_ERROR(LOG_CORE, "Failed to open miscDevice errno %{public}d ", errno);
122 return -1;
123 }
124
125 if (WriteSlot(fd, slot, offset, size) < 0) {
126 HILOG_ERROR(LOG_CORE, "Failed to WriteSlot miscDevice %{public}d errno %{public}d ", slot, errno);
127 close(fd);
128 return -1;
129 }
130 close(fd);
131 return 0;
132 }
133 } // V1_0
134 } // Partitionslot
135 } // HDI
136 } // OHOS
137