main.cpp revision 97ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76 
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    SLOGI("Vold 2.1 (the revenge) firing up");
46
47    mkdir("/dev/block/vold", 0755);
48
49    /* Create our singleton managers */
50    if (!(vm = VolumeManager::Instance())) {
51        SLOGE("Unable to create VolumeManager");
52        exit(1);
53    };
54
55    if (!(nm = NetlinkManager::Instance())) {
56        SLOGE("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        SLOGE("Unable to start VolumeManager (%s)", strerror(errno));
67        exit(1);
68    }
69
70    if (process_config(vm)) {
71        SLOGE("Error reading configuration (%s)... continuing anyways", strerror(errno));
72    }
73
74    if (nm->start()) {
75        SLOGE("Unable to start NetlinkManager (%s)", strerror(errno));
76        exit(1);
77    }
78
79    coldboot("/sys/block");
80    /*
81     * Switch uevents are broken.
82     * For now we manually bootstrap
83     * the ums switch
84     */
85    {
86        FILE *fp;
87        char state[255];
88
89        if ((fp = fopen("/sys/devices/virtual/switch/usb_mass_storage/state",
90                         "r"))) {
91            if (fgets(state, sizeof(state), fp)) {
92                if (!strncmp(state, "online", 6)) {
93                    vm->notifyUmsConnected(true);
94                } else {
95                    vm->notifyUmsConnected(false);
96                }
97            } else {
98                SLOGE("Failed to read switch state (%s)", strerror(errno));
99            }
100
101            fclose(fp);
102        } else {
103            SLOGW("No UMS switch available");
104        }
105    }
106//    coldboot("/sys/class/switch");
107
108    /*
109     * Now that we're up, we can respond to commands
110     */
111    if (cl->startListener()) {
112        SLOGE("Unable to start CommandListener (%s)", strerror(errno));
113        exit(1);
114    }
115
116    // Eventually we'll become the monitoring thread
117    while(1) {
118        sleep(1000);
119    }
120
121    SLOGI("Vold exiting");
122    exit(0);
123}
124
125static void do_coldboot(DIR *d, int lvl)
126{
127    struct dirent *de;
128    int dfd, fd;
129
130    dfd = dirfd(d);
131
132    fd = openat(dfd, "uevent", O_WRONLY);
133    if(fd >= 0) {
134        write(fd, "add\n", 4);
135        close(fd);
136    }
137
138    while((de = readdir(d))) {
139        DIR *d2;
140
141        if (de->d_name[0] == '.')
142            continue;
143
144        if (de->d_type != DT_DIR && lvl > 0)
145            continue;
146
147        fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY);
148        if(fd < 0)
149            continue;
150
151        d2 = fdopendir(fd);
152        if(d2 == 0)
153            close(fd);
154        else {
155            do_coldboot(d2, lvl + 1);
156            closedir(d2);
157        }
158    }
159}
160
161static void coldboot(const char *path)
162{
163    DIR *d = opendir(path);
164    if(d) {
165        do_coldboot(d, 0);
166        closedir(d);
167    }
168}
169
170static int process_config(VolumeManager *vm) {
171    FILE *fp;
172    int n = 0;
173    char line[255];
174
175    if (!(fp = fopen("/etc/vold.fstab", "r"))) {
176        return -1;
177    }
178
179    while(fgets(line, sizeof(line), fp)) {
180        char *next = line;
181        char *type, *label, *mount_point;
182
183        n++;
184        line[strlen(line)-1] = '\0';
185
186        if (line[0] == '#' || line[0] == '\0')
187            continue;
188
189        if (!(type = strsep(&next, " \t"))) {
190            SLOGE("Error parsing type");
191            goto out_syntax;
192        }
193        if (!(label = strsep(&next, " \t"))) {
194            SLOGE("Error parsing label");
195            goto out_syntax;
196        }
197        if (!(mount_point = strsep(&next, " \t"))) {
198            SLOGE("Error parsing mount point");
199            goto out_syntax;
200        }
201
202        if (!strcmp(type, "dev_mount")) {
203            DirectVolume *dv = NULL;
204            char *part, *sysfs_path;
205
206            if (!(part = strsep(&next, " \t"))) {
207                SLOGE("Error parsing partition");
208                goto out_syntax;
209            }
210            if (strcmp(part, "auto") && atoi(part) == 0) {
211                SLOGE("Partition must either be 'auto' or 1 based index instead of '%s'", part);
212                goto out_syntax;
213            }
214
215            if (!strcmp(part, "auto")) {
216                dv = new DirectVolume(vm, label, mount_point, -1);
217            } else {
218                dv = new DirectVolume(vm, label, mount_point, atoi(part));
219            }
220
221            while((sysfs_path = strsep(&next, " \t"))) {
222                if (dv->addPath(sysfs_path)) {
223                    SLOGE("Failed to add devpath %s to volume %s", sysfs_path,
224                         label);
225                    goto out_fail;
226                }
227            }
228            vm->addVolume(dv);
229        } else if (!strcmp(type, "map_mount")) {
230        } else {
231            SLOGE("Unknown type '%s'", type);
232            goto out_syntax;
233        }
234    }
235
236    fclose(fp);
237    return 0;
238
239out_syntax:
240    SLOGE("Syntax error on config line %d", n);
241    errno = -EINVAL;
242out_fail:
243    fclose(fp);
244    return -1;
245}
246