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 "partition.h"
17
18 #include <linux/fs.h>
19 #include <sys/ioctl.h>
20 #include <sys/mount.h>
21 #include <vector>
22 #include "flashd_define.h"
23 #include "flashd_utils.h"
24 #include "fs_manager/mount.h"
25 #include "utils.h"
26 #include "ptable_manager.h"
27 #include "applypatch/data_writer.h"
28
29 namespace Flashd {
DoFlash(const uint8_t *buffer, int bufferSize) const30 int Partition::DoFlash(const uint8_t *buffer, int bufferSize) const
31 {
32 if (buffer == nullptr || bufferSize <= 0 || writer_ == nullptr) {
33 FLASHD_LOGE("buffer is null or writer_ is null or bufferSize is invaild");
34 return FLASHING_ARG_INVALID;
35 }
36
37 if (auto ret = writer_->Write(devName_, buffer, bufferSize); ret != 0) {
38 FLASHD_LOGE("Write fail, ret = %d", ret);
39 return ret;
40 }
41 return 0;
42 }
43
DoErase() const44 int Partition::DoErase() const
45 {
46 #ifdef UPDATER_USE_PTABLE
47 DevicePtable::GetInstance().LoadPartitionInfo();
48 DevicePtable &devicePtb = DevicePtable::GetInstance();
49 Ptable::PtnInfo ptnInfo;
50
51 if (!devicePtb.GetPartionInfoByName(devName_, ptnInfo)) {
52 FLASHD_LOGE("DoErase: cannot find the lun index of partition: %s", devName_.c_str());
53 return FLASHING_ARG_INVALID;
54 }
55 if (ptnInfo.writeMode == "WRITE_IOCTL") {
56 FLASHD_LOGI("erase ext partition");
57 return DoEraseExt(ptnInfo);
58 }
59 #endif
60 return DoErasePartition();
61 }
62
DoErasePartition() const63 int Partition::DoErasePartition() const
64 {
65 auto fd = open(Updater::Utils::GetPartitionRealPath(devName_).c_str(), O_RDWR);
66 if (fd < 0) {
67 FLASHD_LOGE("open partition %s fail, error = %d", devName_.c_str(), errno);
68 return FLASHING_OPEN_PART_ERROR;
69 }
70
71 #ifndef UPDATER_UT
72 uint64_t size = GetBlockDeviceSize(fd);
73 uint64_t range[2] = { 0, size };
74 if (ioctl(fd, BLKSECDISCARD, &range) >= 0) {
75 FLASHD_LOGI("BLKDISCARD success");
76 }
77
78 range[0] = 0;
79 range[1] = size;
80 if (ioctl(fd, BLKDISCARD, &range) < 0) {
81 close(fd);
82 FLASHD_LOGE("BLKDISCARD fail");
83 return FLASHING_NOPERMISSION;
84 }
85 std::vector<uint8_t> buffer(BLOCK_SIZE, 0);
86 if (!Updater::Utils::WriteFully(fd, buffer.data(), buffer.size())) {
87 close(fd);
88 FLASHD_LOGE("WriteFully fail");
89 return FLASHING_PART_WRITE_ERROR;
90 }
91 fsync(fd);
92 #endif
93 close(fd);
94 return 0;
95 }
96
97 #ifdef UPDATER_USE_PTABLE
DoEraseExt(const Ptable::PtnInfo &ptnInfo) const98 int Partition::DoEraseExt(const Ptable::PtnInfo &ptnInfo) const
99 {
100 uint64_t partitionSize = ptnInfo.partitionSize;
101 std::unique_ptr<DataWriter> dataWriter = DataWriter::CreateDataWriter(ptnInfo.writeMode,
102 ptnInfo.writePath, devName_, ptnInfo.startAddr);
103
104 if (!dataWriter) {
105 FLASHD_LOGE("DataWriter creation failed");
106 return FLASHING_ARG_INVALID;
107 }
108 std::vector<uint8_t> zeroBuffer(partitionSize, 0);
109 if (!dataWriter->Write(zeroBuffer.data(), partitionSize, nullptr)) {
110 FLASHD_LOGE("erase %s failed", devName_.c_str());
111 return FLASHING_PART_WRITE_ERROR;
112 }
113
114 return 0;
115 }
116 #endif
117
DoFormat() const118 int Partition::DoFormat() const
119 {
120 auto name = "/" + devName_;
121 if (auto ret = Updater::FormatPartition(name); ret != 0) {
122 FLASHD_LOGE("FormatPartition fail, ret = %d", ret);
123 return ret;
124 }
125
126 if (auto ret = Updater::MountForPath(name); ret != 0) {
127 FLASHD_LOGE("MountForPath fail, ret = %d", ret);
128 return ret;
129 }
130 Updater::Utils::RestoreconPath(name);
131 return 0;
132 }
133
GetBlockDeviceSize(int fd) const134 uint64_t Partition::GetBlockDeviceSize(int fd) const
135 {
136 uint64_t size = 0;
137 return (ioctl(fd, BLKGETSIZE64, &size) == 0) ? size : 0;
138 }
139 }
140