1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <errno.h>
20 #include <string.h>
21 #include <sys/stat.h>
22 #include <sys/types.h>
23
24 #include <fcntl.h>
25 #include <dirent.h>
26 #include <fs_mgr.h>
27
28 #define LOG_TAG "Vold"
29
30 #include "cutils/klog.h"
31 #include "cutils/log.h"
32 #include "cutils/properties.h"
33
34 #include "VolumeManager.h"
35 #include "CommandListener.h"
36 #include "NetlinkManager.h"
37 #include "DirectVolume.h"
38 #include "cryptfs.h"
39
40 static int process_config(VolumeManager *vm);
41 static void coldboot(const char *path);
42
43 #define FSTAB_PREFIX "/fstab."
44 struct fstab *fstab;
45
main()46 int main() {
47
48 VolumeManager *vm;
49 CommandListener *cl;
50 NetlinkManager *nm;
51
52 SLOGI("Vold 2.1 (the revenge) firing up");
53
54 mkdir("/dev/block/vold", 0755);
55
56 /* For when cryptfs checks and mounts an encrypted filesystem */
57 klog_set_level(6);
58
59 /* Create our singleton managers */
60 if (!(vm = VolumeManager::Instance())) {
61 SLOGE("Unable to create VolumeManager");
62 exit(1);
63 };
64
65 if (!(nm = NetlinkManager::Instance())) {
66 SLOGE("Unable to create NetlinkManager");
67 exit(1);
68 };
69
70
71 cl = new CommandListener();
72 vm->setBroadcaster((SocketListener *) cl);
73 nm->setBroadcaster((SocketListener *) cl);
74
75 if (vm->start()) {
76 SLOGE("Unable to start VolumeManager (%s)", strerror(errno));
77 exit(1);
78 }
79
80 if (process_config(vm)) {
81 SLOGE("Error reading configuration (%s)... continuing anyways", strerror(errno));
82 }
83
84 if (nm->start()) {
85 SLOGE("Unable to start NetlinkManager (%s)", strerror(errno));
86 exit(1);
87 }
88
89 coldboot("/sys/block");
90 // coldboot("/sys/class/switch");
91
92 /*
93 * Now that we're up, we can respond to commands
94 */
95 if (cl->startListener()) {
96 SLOGE("Unable to start CommandListener (%s)", strerror(errno));
97 exit(1);
98 }
99
100 // Eventually we'll become the monitoring thread
101 while(1) {
102 sleep(1000);
103 }
104
105 SLOGI("Vold exiting");
106 exit(0);
107 }
108
do_coldboot(DIR * d,int lvl)109 static void do_coldboot(DIR *d, int lvl)
110 {
111 struct dirent *de;
112 int dfd, fd;
113
114 dfd = dirfd(d);
115
116 fd = openat(dfd, "uevent", O_WRONLY);
117 if(fd >= 0) {
118 write(fd, "add\n", 4);
119 close(fd);
120 }
121
122 while((de = readdir(d))) {
123 DIR *d2;
124
125 if (de->d_name[0] == '.')
126 continue;
127
128 if (de->d_type != DT_DIR && lvl > 0)
129 continue;
130
131 fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY);
132 if(fd < 0)
133 continue;
134
135 d2 = fdopendir(fd);
136 if(d2 == 0)
137 close(fd);
138 else {
139 do_coldboot(d2, lvl + 1);
140 closedir(d2);
141 }
142 }
143 }
144
coldboot(const char * path)145 static void coldboot(const char *path)
146 {
147 DIR *d = opendir(path);
148 if(d) {
149 do_coldboot(d, 0);
150 closedir(d);
151 }
152 }
153
process_config(VolumeManager * vm)154 static int process_config(VolumeManager *vm)
155 {
156 char fstab_filename[PROPERTY_VALUE_MAX + sizeof(FSTAB_PREFIX)];
157 char propbuf[PROPERTY_VALUE_MAX];
158 int i;
159 int ret = -1;
160 int flags;
161
162 property_get("ro.hardware", propbuf, "");
163 snprintf(fstab_filename, sizeof(fstab_filename), FSTAB_PREFIX"%s", propbuf);
164
165 fstab = fs_mgr_read_fstab(fstab_filename);
166 if (!fstab) {
167 SLOGE("failed to open %s\n", fstab_filename);
168 return -1;
169 }
170
171 /* Loop through entries looking for ones that vold manages */
172 for (i = 0; i < fstab->num_entries; i++) {
173 if (fs_mgr_is_voldmanaged(&fstab->recs[i])) {
174 DirectVolume *dv = NULL;
175 flags = 0;
176
177 /* Set any flags that might be set for this volume */
178 if (fs_mgr_is_nonremovable(&fstab->recs[i])) {
179 flags |= VOL_NONREMOVABLE;
180 }
181 if (fs_mgr_is_encryptable(&fstab->recs[i])) {
182 flags |= VOL_ENCRYPTABLE;
183 }
184 /* Only set this flag if there is not an emulated sd card */
185 if (fs_mgr_is_noemulatedsd(&fstab->recs[i]) &&
186 !strcmp(fstab->recs[i].fs_type, "vfat")) {
187 flags |= VOL_PROVIDES_ASEC;
188 }
189 dv = new DirectVolume(vm, &(fstab->recs[i]), flags);
190
191 if (dv->addPath(fstab->recs[i].blk_device)) {
192 SLOGE("Failed to add devpath %s to volume %s",
193 fstab->recs[i].blk_device, fstab->recs[i].label);
194 goto out_fail;
195 }
196
197 vm->addVolume(dv);
198 }
199 }
200
201 ret = 0;
202
203 out_fail:
204 return ret;
205 }
206