The Android Open Source Project | 8ac3a13 | 2009-01-20 14:04:01 -0800 | [diff] [blame^] | 1 | |
| 2 | /* |
| 3 | * Copyright (C) 2008 The Android Open Source Project |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include <errno.h> |
| 19 | #include <stdio.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <unistd.h> |
| 22 | #include <string.h> |
| 23 | #include <fcntl.h> |
| 24 | #include <pthread.h> |
| 25 | |
| 26 | #include <sys/socket.h> |
| 27 | #include <sys/select.h> |
| 28 | #include <sys/time.h> |
| 29 | #include <sys/types.h> |
| 30 | #include <sys/inotify.h> |
| 31 | #include <sys/un.h> |
| 32 | |
| 33 | #include <cutils/config_utils.h> |
| 34 | #include <cutils/cpu_info.h> |
| 35 | #include <cutils/properties.h> |
| 36 | #include <cutils/sockets.h> |
| 37 | |
| 38 | #include <linux/netlink.h> |
| 39 | |
| 40 | #include <private/android_filesystem_config.h> |
| 41 | |
| 42 | #include "vold.h" |
| 43 | #include "volmgr.h" |
| 44 | |
| 45 | |
| 46 | #define VOLD_SOCKET "vold" |
| 47 | |
| 48 | /* |
| 49 | * Globals |
| 50 | */ |
| 51 | |
| 52 | static int ver_major = 2; |
| 53 | static int ver_minor = 0; |
| 54 | static pthread_mutex_t write_mutex = PTHREAD_MUTEX_INITIALIZER; |
| 55 | static int fw_sock = -1; |
| 56 | |
| 57 | int main(int argc, char **argv) |
| 58 | { |
| 59 | int door_sock = -1; |
| 60 | int inotify_sock = -1; |
| 61 | int uevent_sock = -1; |
| 62 | struct sockaddr_nl nladdr; |
| 63 | int uevent_sz = 64 * 1024; |
| 64 | |
| 65 | LOG_VOL("Android Volume Daemon version %d.%d\n", ver_major, ver_minor); |
| 66 | |
| 67 | /* |
| 68 | * Create all the various sockets we'll need |
| 69 | */ |
| 70 | |
| 71 | // Socket to listen on for incomming framework connections |
| 72 | if ((door_sock = android_get_control_socket(VOLD_SOCKET)) < 0) { |
| 73 | LOGE("Obtaining file descriptor socket '%s' failed: %s\n", |
| 74 | VOLD_SOCKET, strerror(errno)); |
| 75 | exit(1); |
| 76 | } |
| 77 | |
| 78 | if (listen(door_sock, 4) < 0) { |
| 79 | LOGE("Unable to listen on fd '%d' for socket '%s': %s\n", |
| 80 | door_sock, VOLD_SOCKET, strerror(errno)); |
| 81 | exit(1); |
| 82 | } |
| 83 | |
| 84 | // Socket to listen on for changes to /dev/block |
| 85 | if ((inotify_sock = inotify_init()) < 0) { |
| 86 | LOGE("Unable to initialize inotify interface (%s)\n", strerror(errno)); |
| 87 | exit(1); |
| 88 | } |
| 89 | |
| 90 | fcntl(inotify_sock, F_SETFL, O_NONBLOCK | fcntl(inotify_sock, F_GETFL)); |
| 91 | |
| 92 | if (inotify_add_watch(inotify_sock, DEVPATH, IN_CREATE | IN_DELETE) < 0) { |
| 93 | LOGE("Unable to add inotify watch (%s)\n", strerror(errno)); |
| 94 | exit(1); |
| 95 | } |
| 96 | |
| 97 | // Socket to listen on for uevent changes |
| 98 | memset(&nladdr, 0, sizeof(nladdr)); |
| 99 | nladdr.nl_family = AF_NETLINK; |
| 100 | nladdr.nl_pid = getpid(); |
| 101 | nladdr.nl_groups = 0xffffffff; |
| 102 | |
| 103 | if ((uevent_sock = socket(PF_NETLINK, |
| 104 | SOCK_DGRAM,NETLINK_KOBJECT_UEVENT)) < 0) { |
| 105 | LOGE("Unable to create uevent socket: %s\n", strerror(errno)); |
| 106 | exit(1); |
| 107 | } |
| 108 | |
| 109 | if (setsockopt(uevent_sock, SOL_SOCKET, SO_RCVBUFFORCE, &uevent_sz, |
| 110 | sizeof(uevent_sz)) < 0) { |
| 111 | LOGE("Unable to set uevent socket options: %s\n", strerror(errno)); |
| 112 | exit(1); |
| 113 | } |
| 114 | |
| 115 | if (bind(uevent_sock, (struct sockaddr *) &nladdr, sizeof(nladdr)) < 0) { |
| 116 | LOGE("Unable to bind uevent socket: %s\n", strerror(errno)); |
| 117 | exit(1); |
| 118 | } |
| 119 | |
| 120 | /* |
| 121 | * Bootstrap |
| 122 | */ |
| 123 | |
| 124 | // SD Card system |
| 125 | mmc_bootstrap(); |
| 126 | |
| 127 | // USB Mass Storage |
| 128 | ums_bootstrap(); |
| 129 | |
| 130 | // Volume Manager |
| 131 | volmgr_bootstrap(); |
| 132 | |
| 133 | // Block device system |
| 134 | inotify_bootstrap(); |
| 135 | |
| 136 | /* |
| 137 | * Main loop |
| 138 | */ |
| 139 | |
| 140 | while(1) { |
| 141 | fd_set read_fds; |
| 142 | struct timeval to; |
| 143 | int max = 0; |
| 144 | int rc = 0; |
| 145 | |
| 146 | to.tv_sec = (60 * 60); |
| 147 | to.tv_usec = 0; |
| 148 | |
| 149 | FD_SET(door_sock, &read_fds); |
| 150 | if (door_sock > max) |
| 151 | max = door_sock; |
| 152 | FD_SET(inotify_sock, &read_fds); |
| 153 | if (inotify_sock > max) |
| 154 | max = inotify_sock; |
| 155 | FD_SET(uevent_sock, &read_fds); |
| 156 | if (uevent_sock > max) |
| 157 | max = uevent_sock; |
| 158 | |
| 159 | if (fw_sock != -1) { |
| 160 | FD_SET(fw_sock, &read_fds); |
| 161 | if (fw_sock > max) |
| 162 | max = fw_sock; |
| 163 | } |
| 164 | |
| 165 | if ((rc = select(max + 1, &read_fds, NULL, NULL, &to)) < 0) { |
| 166 | LOGE("select() failed (%s)\n", strerror(errno)); |
| 167 | sleep(1); |
| 168 | continue; |
| 169 | } |
| 170 | |
| 171 | if (!rc) { |
| 172 | continue; |
| 173 | } |
| 174 | |
| 175 | if (FD_ISSET(door_sock, &read_fds)) { |
| 176 | struct sockaddr addr; |
| 177 | socklen_t alen; |
| 178 | |
| 179 | alen = sizeof(addr); |
| 180 | |
| 181 | if ((fw_sock = accept(door_sock, &addr, &alen)) < 0) { |
| 182 | LOGE("Unable to accept framework connection (%s)\n", |
| 183 | strerror(errno)); |
| 184 | } |
| 185 | LOG_VOL("Accepted connection from framework\n"); |
| 186 | if ((rc = volmgr_send_states()) < 0) { |
| 187 | LOGE("Unable to send volmgr status to framework (%d)\n", rc); |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | if (FD_ISSET(fw_sock, &read_fds)) { |
| 192 | if ((rc = process_framework_command(fw_sock)) < 0) { |
| 193 | if (rc == -ECONNRESET) { |
| 194 | LOGE("Framework disconnected\n"); |
| 195 | close(fw_sock); |
| 196 | fw_sock = -1; |
| 197 | } else { |
| 198 | LOGE("Error processing framework command (%s)\n", |
| 199 | strerror(errno)); |
| 200 | } |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | if (FD_ISSET(inotify_sock, &read_fds)) { |
| 205 | if ((rc = process_inotify_event(inotify_sock)) < 0) { |
| 206 | LOGE("Error processing inotify msg (%s)\n", strerror(errno)); |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | if (FD_ISSET(uevent_sock, &read_fds)) { |
| 211 | if ((rc = process_uevent_message(uevent_sock)) < 0) { |
| 212 | LOGE("Error processing uevent msg (%s)\n", strerror(errno)); |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | |
| 217 | } // while |
| 218 | |
| 219 | } |
| 220 | |
| 221 | int send_msg(char* message) |
| 222 | { |
| 223 | int result = -1; |
| 224 | |
| 225 | pthread_mutex_lock(&write_mutex); |
| 226 | |
| 227 | LOG_VOL("send_msg(%s):\n", message); |
| 228 | |
| 229 | if (fw_sock >= 0) |
| 230 | result = write(fw_sock, message, strlen(message) + 1); |
| 231 | |
| 232 | pthread_mutex_unlock(&write_mutex); |
| 233 | |
| 234 | return result; |
| 235 | } |
| 236 | |
| 237 | int send_msg_with_data(char *message, char *data) |
| 238 | { |
| 239 | int result = -1; |
| 240 | |
| 241 | char* buffer = (char *)alloca(strlen(message) + strlen(data) + 1); |
| 242 | if (!buffer) { |
| 243 | LOGE("alloca failed in send_msg_with_data\n"); |
| 244 | return -1; |
| 245 | } |
| 246 | |
| 247 | strcpy(buffer, message); |
| 248 | strcat(buffer, data); |
| 249 | return send_msg(buffer); |
| 250 | } |