1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <pthread.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/un.h>
#include <cutils/config_utils.h>
#include <cutils/cpu_info.h>
#include <cutils/properties.h>
#include <cutils/sockets.h>
#include <linux/netlink.h>
#include <private/android_filesystem_config.h>
#include "vold.h"
#include "volmgr.h"
#define VOLD_SOCKET "vold"
/*
* Globals
*/
static int ver_major = 2;
static int ver_minor = 0;
static pthread_mutex_t write_mutex = PTHREAD_MUTEX_INITIALIZER;
static int fw_sock = -1;
int bootstrap = 0;
int main(int argc, char **argv)
{
int door_sock = -1;
int uevent_sock = -1;
struct sockaddr_nl nladdr;
int uevent_sz = 64 * 1024;
LOGI("Android Volume Daemon version %d.%d", ver_major, ver_minor);
/*
* Create all the various sockets we'll need
*/
// Socket to listen on for incomming framework connections
if ((door_sock = android_get_control_socket(VOLD_SOCKET)) < 0) {
LOGE("Obtaining file descriptor socket '%s' failed: %s",
VOLD_SOCKET, strerror(errno));
exit(1);
}
if (listen(door_sock, 4) < 0) {
LOGE("Unable to listen on fd '%d' for socket '%s': %s",
door_sock, VOLD_SOCKET, strerror(errno));
exit(1);
}
mkdir("/dev/block/vold", 0755);
// Socket to listen on for uevent changes
memset(&nladdr, 0, sizeof(nladdr));
nladdr.nl_family = AF_NETLINK;
nladdr.nl_pid = getpid();
nladdr.nl_groups = 0xffffffff;
if ((uevent_sock = socket(PF_NETLINK,
SOCK_DGRAM,NETLINK_KOBJECT_UEVENT)) < 0) {
LOGE("Unable to create uevent socket: %s", strerror(errno));
exit(1);
}
if (setsockopt(uevent_sock, SOL_SOCKET, SO_RCVBUFFORCE, &uevent_sz,
sizeof(uevent_sz)) < 0) {
LOGE("Unable to set uevent socket options: %s", strerror(errno));
exit(1);
}
if (bind(uevent_sock, (struct sockaddr *) &nladdr, sizeof(nladdr)) < 0) {
LOGE("Unable to bind uevent socket: %s", strerror(errno));
exit(1);
}
/*
* Bootstrap
*/
bootstrap = 1;
// Volume Manager
volmgr_bootstrap();
// SD Card system
mmc_bootstrap();
// USB Mass Storage
ums_bootstrap();
// Switch
switch_bootstrap();
bootstrap = 0;
/*
* Main loop
*/
LOG_VOL("Bootstrapping complete");
while(1) {
fd_set read_fds;
struct timeval to;
int max = 0;
int rc = 0;
to.tv_sec = (60 * 60);
to.tv_usec = 0;
FD_ZERO(&read_fds);
FD_SET(door_sock, &read_fds);
if (door_sock > max)
max = door_sock;
FD_SET(uevent_sock, &read_fds);
if (uevent_sock > max)
max = uevent_sock;
if (fw_sock != -1) {
FD_SET(fw_sock, &read_fds);
if (fw_sock > max)
max = fw_sock;
}
if ((rc = select(max + 1, &read_fds, NULL, NULL, &to)) < 0) {
LOGE("select() failed (%s)", strerror(errno));
sleep(1);
continue;
}
if (!rc) {
continue;
}
if (FD_ISSET(door_sock, &read_fds)) {
struct sockaddr addr;
socklen_t alen;
alen = sizeof(addr);
if (fw_sock != -1) {
LOGE("Dropping duplicate framework connection");
int tmp = accept(door_sock, &addr, &alen);
close(tmp);
continue;
}
if ((fw_sock = accept(door_sock, &addr, &alen)) < 0) {
LOGE("Unable to accept framework connection (%s)",
strerror(errno));
}
LOG_VOL("Accepted connection from framework");
if ((rc = volmgr_send_states()) < 0) {
LOGE("Unable to send volmgr status to framework (%d)", rc);
}
}
if (FD_ISSET(fw_sock, &read_fds)) {
if ((rc = process_framework_command(fw_sock)) < 0) {
if (rc == -ECONNRESET) {
LOGE("Framework disconnected");
close(fw_sock);
fw_sock = -1;
} else {
LOGE("Error processing framework command (%s)",
strerror(errno));
}
}
}
if (FD_ISSET(uevent_sock, &read_fds)) {
if ((rc = process_uevent_message(uevent_sock)) < 0) {
LOGE("Error processing uevent msg (%s)", strerror(errno));
}
}
} // while
}
int send_msg(char* message)
{
int result = -1;
pthread_mutex_lock(&write_mutex);
// LOG_VOL("send_msg(%s):", message);
if (fw_sock >= 0)
result = write(fw_sock, message, strlen(message) + 1);
pthread_mutex_unlock(&write_mutex);
return result;
}
int send_msg_with_data(char *message, char *data)
{
int result = -1;
char* buffer = (char *)alloca(strlen(message) + strlen(data) + 1);
if (!buffer) {
LOGE("alloca failed in send_msg_with_data");
return -1;
}
strcpy(buffer, message);
strcat(buffer, data);
return send_msg(buffer);
}
|
