1 /*
2 * Copyright (c) 2021 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 "volume/volume_info.h"
17
18 #include <sys/mount.h>
19
20 #include "ipc/storage_manager_client.h"
21 #include "storage_service_errno.h"
22 #include "storage_service_log.h"
23 #include "utils/string_utils.h"
24 #include "parameter.h"
25
26 using namespace std;
27 namespace OHOS {
28 namespace StorageDaemon {
29 const int32_t TRUE_LEN = 5;
Create(const std::string volId,const std::string diskId,dev_t device)30 int32_t VolumeInfo::Create(const std::string volId, const std::string diskId, dev_t device)
31 {
32 id_ = volId;
33 diskId_ = diskId;
34 type_ = EXTERNAL;
35 mountState_ = UNMOUNTED;
36 mountFlags_ = 0;
37 userIdOwner_ = 0;
38
39 int32_t err = DoCreate(device);
40 if (err) {
41 return err;
42 }
43 return E_OK;
44 }
45
GetVolumeId()46 std::string VolumeInfo::GetVolumeId()
47 {
48 return id_;
49 }
50
GetVolumeType()51 int32_t VolumeInfo::GetVolumeType()
52 {
53 return type_;
54 }
55
GetDiskId()56 std::string VolumeInfo::GetDiskId()
57 {
58 return diskId_;
59 }
60
GetState()61 int32_t VolumeInfo::GetState()
62 {
63 return mountState_;
64 }
65
Destroy()66 int32_t VolumeInfo::Destroy()
67 {
68 VolumeState state = REMOVED;
69 if (mountState_ == REMOVED || mountState_ == BADREMOVABLE) {
70 return E_OK;
71 }
72 StorageManagerClient client;
73 if (mountState_ != UNMOUNTED) {
74 // force umount
75 UMount(true);
76 state = BADREMOVABLE;
77 if (client.NotifyVolumeStateChanged(id_, StorageManager::VolumeState::BAD_REMOVAL) != E_OK) {
78 LOGE("Volume Notify Bad Removal failed");
79 }
80 } else {
81 if (client.NotifyVolumeStateChanged(id_, StorageManager::VolumeState::REMOVED) != E_OK) {
82 LOGE("Volume Notify Removed failed");
83 }
84 }
85
86 int32_t err = DoDestroy();
87 if (err) {
88 return err;
89 }
90 mountState_ = state;
91 return E_OK;
92 }
93
Mount(uint32_t flags)94 int32_t VolumeInfo::Mount(uint32_t flags)
95 {
96 int32_t err = 0;
97
98 if (mountState_ == MOUNTED) {
99 return E_OK;
100 }
101 if (mountState_ != CHECKING) {
102 LOGE("please check volume %{public}s first", GetVolumeId().c_str());
103 return E_VOL_STATE;
104 }
105
106 std::string key = "persist.filemanagement.usb.readonly";
107 int handle = static_cast<int>(FindParameter(key.c_str()));
108 if (handle != -1) {
109 char rdOnlyEnable[255] = {"false"};
110 auto res = GetParameterValue(handle, rdOnlyEnable, 255);
111 if (res >= 0 && strncmp(rdOnlyEnable, "true", TRUE_LEN) == 0) {
112 mountFlags_ |= MS_RDONLY;
113 } else {
114 mountFlags_ &= ~MS_RDONLY;
115 }
116 }
117
118 mountFlags_ |= flags;
119 LOGI("external volume mount start");
120 err = DoMount(mountFlags_);
121 if (err) {
122 mountState_ = UNMOUNTED;
123 return err;
124 }
125 LOGI("external volume mount success");
126 mountState_ = MOUNTED;
127 return E_OK;
128 }
129
UMount(bool force)130 int32_t VolumeInfo::UMount(bool force)
131 {
132 int32_t err = 0;
133
134 if (mountState_ == REMOVED || mountState_ == BADREMOVABLE) {
135 LOGE("the volume %{public}s is in REMOVED state", GetVolumeId().c_str());
136 return E_VOL_STATE;
137 }
138
139 if (mountState_ == UNMOUNTED) {
140 return E_OK;
141 }
142
143 if (mountState_ == CHECKING) {
144 mountState_ = UNMOUNTED;
145 return E_OK;
146 }
147
148 if (mountState_ == EJECTING && !force) {
149 return E_WAIT;
150 }
151
152 mountState_ = EJECTING;
153 StorageManagerClient client;
154 if (client.NotifyVolumeStateChanged(id_, StorageManager::VolumeState::EJECTING) != E_OK) {
155 LOGE("Volume Notify Ejecting failed");
156 }
157
158 err = DoUMount(force);
159 if (!force && err) {
160 mountState_ = MOUNTED;
161 return err;
162 }
163
164 mountState_ = UNMOUNTED;
165 if (client.NotifyVolumeStateChanged(id_, StorageManager::VolumeState::UNMOUNTED) != E_OK) {
166 LOGE("Volume Notify Unmounted failed");
167 }
168 return E_OK;
169 }
170
Check()171 int32_t VolumeInfo::Check()
172 {
173 if (mountState_ != UNMOUNTED) {
174 LOGE("the volume %{public}s is not in UNMOUNT state", GetVolumeId().c_str());
175 return E_VOL_STATE;
176 }
177
178 if (mountState_ == CHECKING) {
179 mountState_ = UNMOUNTED;
180 }
181
182 int32_t err = DoCheck();
183 if (err) {
184 return err;
185 }
186 mountState_ = CHECKING;
187 return E_OK;
188 }
189
Format(std::string type)190 int32_t VolumeInfo::Format(std::string type)
191 {
192 if (mountState_ != UNMOUNTED) {
193 LOGE("Please unmount the volume %{public}s first", GetVolumeId().c_str());
194 return E_VOL_STATE;
195 }
196
197 int32_t err = DoFormat(type);
198 return err;
199 }
200
SetVolumeDescription(const std::string description)201 int32_t VolumeInfo::SetVolumeDescription(const std::string description)
202 {
203 if (mountState_ != UNMOUNTED) {
204 LOGE("Please unmount the volume %{public}s first", GetVolumeId().c_str());
205 return E_VOL_STATE;
206 }
207
208 int32_t err = DoSetVolDesc(description);
209 return err;
210 }
211 } // StorageDaemon
212 } // OHOS
213