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 namespace OHOS {
25 namespace HDI {
26 namespace Partitionslot {
27 namespace V1_0 {
28 #define HILOG_LOG_TAG hdf_partitionslot_manager
29
30 constexpr int32_t UPDATE_PARTITION_B = 2;
31
32 constexpr off_t MISC_PARTITION_ACTIVE_SLOT_OFFSET = 1024;
33 constexpr off_t MISC_PARTITION_ACTIVE_SLOT_SIZE = 4;
34
35 constexpr off_t MISC_PARTITION_UNBOOT_SLOT_OFFSET = MISC_PARTITION_ACTIVE_SLOT_OFFSET + MISC_PARTITION_ACTIVE_SLOT_SIZE;
36 constexpr off_t MISC_PARTITION_UNBOOT_SLOT_SIZE = 4;
37
38 #define MISC_DEVICE_NODE "/dev/block/by-name/bootctrl"
39
GetCurrentSlot(int32_t & currentSlot,int32_t & numOfSlots)40 int32_t PartitionSlotManager::GetCurrentSlot(int32_t& currentSlot, int32_t& numOfSlots)
41 {
42 HILOG_DEBUG(LOG_CORE, "%{public}s called!", __func__);
43 numOfSlots = system::GetIntParameter("ohos.boot.bootslots", 1);
44 currentSlot = ReadMisc(MISC_PARTITION_ACTIVE_SLOT_OFFSET, MISC_PARTITION_ACTIVE_SLOT_SIZE);
45 HILOG_INFO(LOG_CORE, "current slot is %{public}d, numOfSlots is %{public}d", currentSlot, numOfSlots);
46 return 0;
47 }
48
GetSlotSuffix(int32_t slot,std::string & suffix)49 int32_t PartitionSlotManager::GetSlotSuffix(int32_t slot, std::string& suffix)
50 {
51 HILOG_DEBUG(LOG_CORE, "%{public}s called!", __func__);
52 if (slot == UPDATE_PARTITION_B) {
53 suffix = "_b";
54 } else {
55 suffix = "_a";
56 }
57 HILOG_INFO(LOG_CORE, "suffix is %{public}s", suffix.c_str());
58 return 0;
59 }
60
SetActiveSlot(int32_t slot)61 int32_t PartitionSlotManager::SetActiveSlot(int32_t slot)
62 {
63 HILOG_DEBUG(LOG_CORE, "%{public}s called!, slot is %{public}d", __func__, slot);
64 return WriteSlotToMisc(slot, MISC_PARTITION_ACTIVE_SLOT_OFFSET, MISC_PARTITION_ACTIVE_SLOT_SIZE);
65 }
66
SetSlotUnbootable(int32_t slot)67 int32_t PartitionSlotManager::SetSlotUnbootable(int32_t slot)
68 {
69 HILOG_DEBUG(LOG_CORE, "%{public}s called!, slot is %{public}d", __func__, slot);
70 return WriteSlotToMisc(slot, MISC_PARTITION_UNBOOT_SLOT_OFFSET, MISC_PARTITION_UNBOOT_SLOT_SIZE);
71 }
72
WriteSlot(int fd,int32_t slot,off_t offset,off_t size)73 int32_t PartitionSlotManager::WriteSlot(int fd, int32_t slot, off_t offset, off_t size)
74 {
75 if (lseek(fd, offset, SEEK_SET) < 0) {
76 HILOG_ERROR(LOG_CORE, "Failed lseek slot %{public}d errno %{public}d", slot, errno);
77 return -1;
78 }
79
80 if (write(fd, &slot, size) != size) {
81 HILOG_ERROR(LOG_CORE, "Write slot failed ");
82 return -1;
83 }
84 return 0;
85 }
86
ReadMisc(off_t offset,off_t size)87 int PartitionSlotManager::ReadMisc(off_t offset, off_t size)
88 {
89 int fd = open(MISC_DEVICE_NODE, O_RDWR | O_CLOEXEC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
90 if (fd < 0) {
91 return -1;
92 }
93 if (lseek(fd, offset, SEEK_SET) < 0) {
94 HILOG_ERROR(LOG_CORE, "Failed lseek miscDevice errno %{public}d ", errno);
95 close(fd);
96 return -1;
97 }
98 int32_t slot = 0;
99 if (read(fd, &slot, size) != size) {
100 HILOG_ERROR(LOG_CORE, "Failed read migic miscDevice errno %{public}d ", errno);
101 close(fd);
102 return -1;
103 }
104 HILOG_INFO(LOG_CORE, "Read slot %{public}d", slot);
105 close(fd);
106 return slot;
107 }
108
WriteSlotToMisc(int32_t slot,off_t offset,off_t size)109 int PartitionSlotManager::WriteSlotToMisc(int32_t slot, off_t offset, off_t size)
110 {
111 if (slot < 0) {
112 HILOG_ERROR(LOG_CORE, "Invalid slot : %{public}d", slot);
113 return -1;
114 }
115 int fd = open(MISC_DEVICE_NODE, O_RDWR | O_CLOEXEC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
116 if (fd < 0) {
117 HILOG_ERROR(LOG_CORE, "Failed to open miscDevice errno %{public}d ", errno);
118 return -1;
119 }
120
121 if (WriteSlot(fd, slot, offset, size) < 0) {
122 HILOG_ERROR(LOG_CORE, "Failed to WriteSlot miscDevice %{public}d errno %{public}d ", slot, errno);
123 close(fd);
124 return -1;
125 }
126 close(fd);
127 return 0;
128 }
129 } // V1_0
130 } // Partitionslot
131 } // HDI
132 } // OHOS
133