main.cpp revision 0cde53ce7b44ce189d0bc6fa81c0036e096deb51 
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
27#define LOG_TAG "Vold"
28
29#include "cutils/log.h"
30
31#include "VolumeManager.h"
32#include "CommandListener.h"
33#include "NetlinkManager.h"
34#include "DirectVolume.h"
35
36static int process_config(VolumeManager *vm);
37static void coldboot(const char *path);
38
39int main() {
40
41    VolumeManager *vm;
42    CommandListener *cl;
43    NetlinkManager *nm;
44
45    LOGI("Vold 2.0 (the revenge) firing up");
46
47    mkdir("/dev/block/vold", 0755);
48
49    /* Create our singleton managers */
50    if (!(vm = VolumeManager::Instance())) {
51        LOGE("Unable to create VolumeManager");
52        exit(1);
53    };
54
55    if (!(nm = NetlinkManager::Instance())) {
56        LOGE("Unable to create NetlinkManager");
57        exit(1);
58    };
59
60
61    cl = new CommandListener();
62    vm->setBroadcaster((SocketListener *) cl);
63    nm->setBroadcaster((SocketListener *) cl);
64
65    if (vm->start()) {
66        LOGE("Unable to start VolumeManager (%s)", strerror(errno));
67        exit(1);
68    }
69
70    if (process_config(vm)) {
71        LOGE("Error reading configuration (%s)", strerror(errno));
72        exit(1);
73    }
74
75    if (nm->start()) {
76        LOGE("Unable to start NetlinkManager (%s)", strerror(errno));
77        exit(1);
78    }
79
80    coldboot("/sys/block");
81    /*
82     * Switch uevents are broken.
83     * For now we manually bootstrap
84     * the ums switch
85     */
86    {
87        FILE *fp;
88        char state[255];
89
90        if (!(fp = fopen("/sys/devices/virtual/switch/usb_mass_storage/state",
91                         "r"))) {
92            LOGE("Failed to open ums switch (%s)", strerror(errno));
93            exit(1);
94        }
95        if (!fgets(state, sizeof(state), fp)) {
96            LOGE("Failed to read switch state (%s)", strerror(errno));
97            fclose(fp);
98            exit(1);
99        }
100        if (!strncmp(state, "online", 6)) {
101            LOGD("Bootstrapped ums is connected");
102            vm->notifyUmsConnected(true);
103        } else {
104            LOGD("Bootstrapped ums is disconnected");
105            vm->notifyUmsConnected(false);
106        }
107        fclose(fp);
108    }
109//    coldboot("/sys/class/switch");
110
111    /*
112     * Now that we're up, we can respond to commands
113     */
114    if (cl->startListener()) {
115        LOGE("Unable to start CommandListener (%s)", strerror(errno));
116        exit(1);
117    }
118
119    // Eventually we'll become the monitoring thread
120    while(1) {
121        sleep(1000);
122    }
123
124    LOGI("Vold exiting");
125    exit(0);
126}
127
128static void do_coldboot(DIR *d, int lvl)
129{
130    struct dirent *de;
131    int dfd, fd;
132
133    dfd = dirfd(d);
134
135    fd = openat(dfd, "uevent", O_WRONLY);
136    if(fd >= 0) {
137        write(fd, "add\n", 4);
138        close(fd);
139    }
140
141    while((de = readdir(d))) {
142        DIR *d2;
143
144        if (de->d_name[0] == '.')
145            continue;
146
147        if (de->d_type != DT_DIR && lvl > 0)
148            continue;
149
150        fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY);
151        if(fd < 0)
152            continue;
153
154        d2 = fdopendir(fd);
155        if(d2 == 0)
156            close(fd);
157        else {
158            do_coldboot(d2, lvl + 1);
159            closedir(d2);
160        }
161    }
162}
163
164static void coldboot(const char *path)
165{
166    DIR *d = opendir(path);
167    if(d) {
168        do_coldboot(d, 0);
169        closedir(d);
170    }
171}
172
173static int process_config(VolumeManager *vm) {
174    FILE *fp;
175    int n = 0;
176    char line[255];
177
178    if (!(fp = fopen("/etc/vold.fstab", "r"))) {
179        return -1;
180    }
181
182    while(fgets(line, sizeof(line), fp)) {
183        char *next = line;
184        char *type, *label, *mount_point;
185
186        n++;
187        line[strlen(line)-1] = '\0';
188
189        if (line[0] == '#' || line[0] == '\0')
190            continue;
191
192        if (!(type = strsep(&next, " \t"))) {
193            LOGE("Error parsing type");
194            goto out_syntax;
195        }
196        if (!(label = strsep(&next, " \t"))) {
197            LOGE("Error parsing label");
198            goto out_syntax;
199        }
200        if (!(mount_point = strsep(&next, " \t"))) {
201            LOGE("Error parsing mount point");
202            goto out_syntax;
203        }
204
205        if (!strcmp(type, "dev_mount")) {
206            DirectVolume *dv = NULL;
207            char *part, *sysfs_path;
208
209            if (!(part = strsep(&next, " \t"))) {
210                LOGE("Error parsing partition");
211                goto out_syntax;
212            }
213            if (strcmp(part, "auto") && atoi(part) == 0) {
214                LOGE("Partition must either be 'auto' or 1 based index instead of '%s'", part);
215                goto out_syntax;
216            }
217
218            if (!strcmp(part, "auto")) {
219                dv = new DirectVolume(vm, label, mount_point, -1);
220            } else {
221                dv = new DirectVolume(vm, label, mount_point, atoi(part));
222            }
223
224            while((sysfs_path = strsep(&next, " \t"))) {
225                if (dv->addPath(sysfs_path)) {
226                    LOGE("Failed to add devpath %s to volume %s", sysfs_path,
227                         label);
228                    goto out_fail;
229                }
230            }
231            vm->addVolume(dv);
232        } else if (!strcmp(type, "map_mount")) {
233        } else {
234            LOGE("Unknown type '%s'", type);
235            goto out_syntax;
236        }
237    }
238
239    fclose(fp);
240    return 0;
241
242out_syntax:
243    LOGE("Syntax error on config line %d", n);
244    errno = -EINVAL;
245out_fail:
246    fclose(fp);
247    return -1;
248}
249