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 "Disk.h" 18 #include "VolumeManager.h" 19 #include "CommandListener.h" 20 #include "CryptCommandListener.h" 21 #include "NetlinkManager.h" 22 #include "cryptfs.h" 23 #include "sehandle.h" 24 25 #include <android-base/logging.h> 26 #include <android-base/stringprintf.h> 27 #include <cutils/klog.h> 28 #include <cutils/properties.h> 29 #include <cutils/sockets.h> 30 31 #include <stdio.h> 32 #include <stdlib.h> 33 #include <errno.h> 34 #include <string.h> 35 #include <sys/stat.h> 36 #include <sys/types.h> 37 #include <getopt.h> 38 #include <fcntl.h> 39 #include <dirent.h> 40 #include <fs_mgr.h> 41 42 static int process_config(VolumeManager *vm); 43 static void coldboot(const char *path); 44 static void parse_args(int argc, char** argv); 45 46 struct fstab *fstab; 47 48 struct selabel_handle *sehandle; 49 50 using android::base::StringPrintf; 51 52 int main(int argc, char** argv) { 53 setenv("ANDROID_LOG_TAGS", "*:v", 1); 54 android::base::InitLogging(argv, android::base::LogdLogger(android::base::SYSTEM)); 55 56 LOG(INFO) << "Vold 3.0 (the awakening) firing up"; 57 58 LOG(VERBOSE) << "Detected support for:" 59 << (android::vold::IsFilesystemSupported("ext4") ? " ext4" : "") 60 << (android::vold::IsFilesystemSupported("f2fs") ? " f2fs" : "") 61 << (android::vold::IsFilesystemSupported("vfat") ? " vfat" : ""); 62 63 VolumeManager *vm; 64 CommandListener *cl; 65 CryptCommandListener *ccl; 66 NetlinkManager *nm; 67 68 parse_args(argc, argv); 69 70 sehandle = selinux_android_file_context_handle(); 71 if (sehandle) { 72 selinux_android_set_sehandle(sehandle); 73 } 74 75 // Quickly throw a CLOEXEC on the socket we just inherited from init 76 fcntl(android_get_control_socket("vold"), F_SETFD, FD_CLOEXEC); 77 fcntl(android_get_control_socket("cryptd"), F_SETFD, FD_CLOEXEC); 78 79 mkdir("/dev/block/vold", 0755); 80 81 /* For when cryptfs checks and mounts an encrypted filesystem */ 82 klog_set_level(6); 83 84 /* Create our singleton managers */ 85 if (!(vm = VolumeManager::Instance())) { 86 LOG(ERROR) << "Unable to create VolumeManager"; 87 exit(1); 88 } 89 90 if (!(nm = NetlinkManager::Instance())) { 91 LOG(ERROR) << "Unable to create NetlinkManager"; 92 exit(1); 93 } 94 95 if (property_get_bool("vold.debug", false)) { 96 vm->setDebug(true); 97 } 98 99 cl = new CommandListener(); 100 ccl = new CryptCommandListener(); 101 vm->setBroadcaster((SocketListener *) cl); 102 nm->setBroadcaster((SocketListener *) cl); 103 104 if (vm->start()) { 105 PLOG(ERROR) << "Unable to start VolumeManager"; 106 exit(1); 107 } 108 109 if (process_config(vm)) { 110 PLOG(ERROR) << "Error reading configuration... continuing anyways"; 111 } 112 113 if (nm->start()) { 114 PLOG(ERROR) << "Unable to start NetlinkManager"; 115 exit(1); 116 } 117 118 coldboot("/sys/block"); 119 // coldboot("/sys/class/switch"); 120 121 /* 122 * Now that we're up, we can respond to commands 123 */ 124 if (cl->startListener()) { 125 PLOG(ERROR) << "Unable to start CommandListener"; 126 exit(1); 127 } 128 129 if (ccl->startListener()) { 130 PLOG(ERROR) << "Unable to start CryptCommandListener"; 131 exit(1); 132 } 133 134 // Eventually we'll become the monitoring thread 135 while(1) { 136 sleep(1000); 137 } 138 139 LOG(ERROR) << "Vold exiting"; 140 exit(0); 141 } 142 143 static void parse_args(int argc, char** argv) { 144 static struct option opts[] = { 145 {"blkid_context", required_argument, 0, 'b' }, 146 {"blkid_untrusted_context", required_argument, 0, 'B' }, 147 {"fsck_context", required_argument, 0, 'f' }, 148 {"fsck_untrusted_context", required_argument, 0, 'F' }, 149 }; 150 151 int c; 152 while ((c = getopt_long(argc, argv, "", opts, nullptr)) != -1) { 153 switch (c) { 154 case 'b': android::vold::sBlkidContext = optarg; break; 155 case 'B': android::vold::sBlkidUntrustedContext = optarg; break; 156 case 'f': android::vold::sFsckContext = optarg; break; 157 case 'F': android::vold::sFsckUntrustedContext = optarg; break; 158 } 159 } 160 161 CHECK(android::vold::sBlkidContext != nullptr); 162 CHECK(android::vold::sBlkidUntrustedContext != nullptr); 163 CHECK(android::vold::sFsckContext != nullptr); 164 CHECK(android::vold::sFsckUntrustedContext != nullptr); 165 } 166 167 static void do_coldboot(DIR *d, int lvl) { 168 struct dirent *de; 169 int dfd, fd; 170 171 dfd = dirfd(d); 172 173 fd = openat(dfd, "uevent", O_WRONLY | O_CLOEXEC); 174 if(fd >= 0) { 175 write(fd, "add\n", 4); 176 close(fd); 177 } 178 179 while((de = readdir(d))) { 180 DIR *d2; 181 182 if (de->d_name[0] == '.') 183 continue; 184 185 if (de->d_type != DT_DIR && lvl > 0) 186 continue; 187 188 fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY); 189 if(fd < 0) 190 continue; 191 192 d2 = fdopendir(fd); 193 if(d2 == 0) 194 close(fd); 195 else { 196 do_coldboot(d2, lvl + 1); 197 closedir(d2); 198 } 199 } 200 } 201 202 static void coldboot(const char *path) { 203 DIR *d = opendir(path); 204 if(d) { 205 do_coldboot(d, 0); 206 closedir(d); 207 } 208 } 209 210 static int process_config(VolumeManager *vm) { 211 std::string path(android::vold::DefaultFstabPath()); 212 fstab = fs_mgr_read_fstab(path.c_str()); 213 if (!fstab) { 214 PLOG(ERROR) << "Failed to open default fstab " << path; 215 return -1; 216 } 217 218 /* Loop through entries looking for ones that vold manages */ 219 bool has_adoptable = false; 220 for (int i = 0; i < fstab->num_entries; i++) { 221 if (fs_mgr_is_voldmanaged(&fstab->recs[i])) { 222 if (fs_mgr_is_nonremovable(&fstab->recs[i])) { 223 LOG(WARNING) << "nonremovable no longer supported; ignoring volume"; 224 continue; 225 } 226 227 std::string sysPattern(fstab->recs[i].blk_device); 228 std::string nickname(fstab->recs[i].label); 229 int flags = 0; 230 231 if (fs_mgr_is_encryptable(&fstab->recs[i])) { 232 flags |= android::vold::Disk::Flags::kAdoptable; 233 has_adoptable = true; 234 } 235 if (fs_mgr_is_noemulatedsd(&fstab->recs[i]) 236 || property_get_bool("vold.debug.default_primary", false)) { 237 flags |= android::vold::Disk::Flags::kDefaultPrimary; 238 } 239 240 vm->addDiskSource(std::shared_ptr<VolumeManager::DiskSource>( 241 new VolumeManager::DiskSource(sysPattern, nickname, flags))); 242 } 243 } 244 property_set("vold.has_adoptable", has_adoptable ? "1" : "0"); 245 return 0; 246 } 247
