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#include "cryptfs.h"
36
37static int process_config(VolumeManager *vm);
38static void coldboot(const char *path);
39
40int main() {
41
42    VolumeManager *vm;
43    CommandListener *cl;
44    NetlinkManager *nm;
45
46    SLOGI("Vold 2.1 (the revenge) firing up");
47
48    mkdir("/dev/block/vold", 0755);
49
50    /* Create our singleton managers */
51    if (!(vm = VolumeManager::Instance())) {
52        SLOGE("Unable to create VolumeManager");
53        exit(1);
54    };
55
56    if (!(nm = NetlinkManager::Instance())) {
57        SLOGE("Unable to create NetlinkManager");
58        exit(1);
59    };
60
61
62    cl = new CommandListener();
63    vm->setBroadcaster((SocketListener *) cl);
64    nm->setBroadcaster((SocketListener *) cl);
65
66    if (vm->start()) {
67        SLOGE("Unable to start VolumeManager (%s)", strerror(errno));
68        exit(1);
69    }
70
71    if (process_config(vm)) {
72        SLOGE("Error reading configuration (%s)... continuing anyways", strerror(errno));
73    }
74
75    if (nm->start()) {
76        SLOGE("Unable to start NetlinkManager (%s)", strerror(errno));
77        exit(1);
78    }
79
80    coldboot("/sys/block");
81//    coldboot("/sys/class/switch");
82
83    /*
84     * Now that we're up, we can respond to commands
85     */
86    if (cl->startListener()) {
87        SLOGE("Unable to start CommandListener (%s)", strerror(errno));
88        exit(1);
89    }
90
91    // Eventually we'll become the monitoring thread
92    while(1) {
93        sleep(1000);
94    }
95
96    SLOGI("Vold exiting");
97    exit(0);
98}
99
100static void do_coldboot(DIR *d, int lvl)
101{
102    struct dirent *de;
103    int dfd, fd;
104
105    dfd = dirfd(d);
106
107    fd = openat(dfd, "uevent", O_WRONLY);
108    if(fd >= 0) {
109        write(fd, "add\n", 4);
110        close(fd);
111    }
112
113    while((de = readdir(d))) {
114        DIR *d2;
115
116        if (de->d_name[0] == '.')
117            continue;
118
119        if (de->d_type != DT_DIR && lvl > 0)
120            continue;
121
122        fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY);
123        if(fd < 0)
124            continue;
125
126        d2 = fdopendir(fd);
127        if(d2 == 0)
128            close(fd);
129        else {
130            do_coldboot(d2, lvl + 1);
131            closedir(d2);
132        }
133    }
134}
135
136static void coldboot(const char *path)
137{
138    DIR *d = opendir(path);
139    if(d) {
140        do_coldboot(d, 0);
141        closedir(d);
142    }
143}
144
145static int parse_mount_flags(char *mount_flags)
146{
147    char *save_ptr;
148    int flags = 0;
149
150    if (strcasestr(mount_flags, "encryptable")) {
151        flags |= VOL_ENCRYPTABLE;
152    }
153
154    if (strcasestr(mount_flags, "nonremovable")) {
155        flags |= VOL_NONREMOVABLE;
156    }
157
158    return flags;
159}
160
161static int process_config(VolumeManager *vm) {
162    FILE *fp;
163    int n = 0;
164    char line[255];
165
166    if (!(fp = fopen("/etc/vold.fstab", "r"))) {
167        return -1;
168    }
169
170    while(fgets(line, sizeof(line), fp)) {
171        const char *delim = " \t";
172        char *save_ptr;
173        char *type, *label, *mount_point, *mount_flags, *sysfs_path;
174        int flags;
175
176        n++;
177        line[strlen(line)-1] = '\0';
178
179        if (line[0] == '#' || line[0] == '\0')
180            continue;
181
182        if (!(type = strtok_r(line, delim, &save_ptr))) {
183            SLOGE("Error parsing type");
184            goto out_syntax;
185        }
186        if (!(label = strtok_r(NULL, delim, &save_ptr))) {
187            SLOGE("Error parsing label");
188            goto out_syntax;
189        }
190        if (!(mount_point = strtok_r(NULL, delim, &save_ptr))) {
191            SLOGE("Error parsing mount point");
192            goto out_syntax;
193        }
194
195        if (!strcmp(type, "dev_mount")) {
196            DirectVolume *dv = NULL;
197            char *part;
198
199            if (!(part = strtok_r(NULL, delim, &save_ptr))) {
200                SLOGE("Error parsing partition");
201                goto out_syntax;
202            }
203            if (strcmp(part, "auto") && atoi(part) == 0) {
204                SLOGE("Partition must either be 'auto' or 1 based index instead of '%s'", part);
205                goto out_syntax;
206            }
207
208            if (!strcmp(part, "auto")) {
209                dv = new DirectVolume(vm, label, mount_point, -1);
210            } else {
211                dv = new DirectVolume(vm, label, mount_point, atoi(part));
212            }
213
214            while ((sysfs_path = strtok_r(NULL, delim, &save_ptr))) {
215                if (*sysfs_path != '/') {
216                    /* If the first character is not a '/', it must be flags */
217                    break;
218                }
219                if (dv->addPath(sysfs_path)) {
220                    SLOGE("Failed to add devpath %s to volume %s", sysfs_path,
221                         label);
222                    goto out_fail;
223                }
224            }
225
226            /* If sysfs_path is non-null at this point, then it contains
227             * the optional flags for this volume
228             */
229            if (sysfs_path)
230                flags = parse_mount_flags(sysfs_path);
231            else
232                flags = 0;
233            dv->setFlags(flags);
234
235            vm->addVolume(dv);
236        } else if (!strcmp(type, "map_mount")) {
237        } else {
238            SLOGE("Unknown type '%s'", type);
239            goto out_syntax;
240        }
241    }
242
243    fclose(fp);
244    return 0;
245
246out_syntax:
247    SLOGE("Syntax error on config line %d", n);
248    errno = -EINVAL;
249out_fail:
250    fclose(fp);
251    return -1;
252}
253