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