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
40static int process_config(VolumeManager *vm);
41static void coldboot(const char *path);
42
43#define FSTAB_PREFIX "/fstab."
44struct fstab *fstab;
45
46int 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
109static 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
145static 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
154static 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
203out_fail:
204    return ret;
205}
206