upload android base code part6
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258
android/system/vold/main.cpp
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258
android/system/vold/main.cpp
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/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "Disk.h"
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#include "VolumeManager.h"
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#include "CommandListener.h"
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#include "CryptCommandListener.h"
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#include "NetlinkManager.h"
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#include "cryptfs.h"
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#include "sehandle.h"
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#include <android-base/logging.h>
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#include <android-base/stringprintf.h>
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#include <cutils/klog.h>
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#include <cutils/properties.h>
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#include <cutils/sockets.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <getopt.h>
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#include <fcntl.h>
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#include <dirent.h>
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#include <fs_mgr.h>
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static int process_config(VolumeManager *vm, bool* has_adoptable, bool* has_quota);
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static void coldboot(const char *path);
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static void parse_args(int argc, char** argv);
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struct fstab *fstab;
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struct selabel_handle *sehandle;
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using android::base::StringPrintf;
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int main(int argc, char** argv) {
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setenv("ANDROID_LOG_TAGS", "*:v", 1);
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android::base::InitLogging(argv, android::base::LogdLogger(android::base::SYSTEM));
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LOG(INFO) << "Vold 3.0 (the awakening) firing up";
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LOG(VERBOSE) << "Detected support for:"
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<< (android::vold::IsFilesystemSupported("ext4") ? " ext4" : "")
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<< (android::vold::IsFilesystemSupported("f2fs") ? " f2fs" : "")
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<< (android::vold::IsFilesystemSupported("vfat") ? " vfat" : "");
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VolumeManager *vm;
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CommandListener *cl;
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CryptCommandListener *ccl;
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NetlinkManager *nm;
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parse_args(argc, argv);
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sehandle = selinux_android_file_context_handle();
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if (sehandle) {
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selinux_android_set_sehandle(sehandle);
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}
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// Quickly throw a CLOEXEC on the socket we just inherited from init
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fcntl(android_get_control_socket("vold"), F_SETFD, FD_CLOEXEC);
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fcntl(android_get_control_socket("cryptd"), F_SETFD, FD_CLOEXEC);
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mkdir("/dev/block/vold", 0755);
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/* For when cryptfs checks and mounts an encrypted filesystem */
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klog_set_level(6);
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/* Create our singleton managers */
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if (!(vm = VolumeManager::Instance())) {
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LOG(ERROR) << "Unable to create VolumeManager";
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exit(1);
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}
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if (!(nm = NetlinkManager::Instance())) {
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LOG(ERROR) << "Unable to create NetlinkManager";
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exit(1);
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}
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if (property_get_bool("vold.debug", false)) {
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vm->setDebug(true);
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}
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cl = new CommandListener();
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ccl = new CryptCommandListener();
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vm->setBroadcaster((SocketListener *) cl);
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nm->setBroadcaster((SocketListener *) cl);
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if (vm->start()) {
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PLOG(ERROR) << "Unable to start VolumeManager";
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exit(1);
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}
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bool has_adoptable;
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bool has_quota;
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if (process_config(vm, &has_adoptable, &has_quota)) {
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PLOG(ERROR) << "Error reading configuration... continuing anyways";
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}
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if (nm->start()) {
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PLOG(ERROR) << "Unable to start NetlinkManager";
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exit(1);
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}
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/*
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* Now that we're up, we can respond to commands
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*/
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if (cl->startListener()) {
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PLOG(ERROR) << "Unable to start CommandListener";
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exit(1);
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}
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if (ccl->startListener()) {
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PLOG(ERROR) << "Unable to start CryptCommandListener";
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exit(1);
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}
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// This call should go after listeners are started to avoid
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// a deadlock between vold and init (see b/34278978 for details)
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property_set("vold.has_adoptable", has_adoptable ? "1" : "0");
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property_set("vold.has_quota", has_quota ? "1" : "0");
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// Do coldboot here so it won't block booting,
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// also the cold boot is needed in case we have flash drive
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// connected before Vold launched
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coldboot("/sys/block");
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// Eventually we'll become the monitoring thread
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while(1) {
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pause();
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}
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LOG(ERROR) << "Vold exiting";
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exit(0);
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}
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static void parse_args(int argc, char** argv) {
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static struct option opts[] = {
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{"blkid_context", required_argument, 0, 'b' },
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{"blkid_untrusted_context", required_argument, 0, 'B' },
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{"fsck_context", required_argument, 0, 'f' },
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{"fsck_untrusted_context", required_argument, 0, 'F' },
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};
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int c;
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while ((c = getopt_long(argc, argv, "", opts, nullptr)) != -1) {
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switch (c) {
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case 'b': android::vold::sBlkidContext = optarg; break;
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case 'B': android::vold::sBlkidUntrustedContext = optarg; break;
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case 'f': android::vold::sFsckContext = optarg; break;
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case 'F': android::vold::sFsckUntrustedContext = optarg; break;
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}
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}
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CHECK(android::vold::sBlkidContext != nullptr);
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CHECK(android::vold::sBlkidUntrustedContext != nullptr);
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CHECK(android::vold::sFsckContext != nullptr);
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CHECK(android::vold::sFsckUntrustedContext != nullptr);
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}
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static void do_coldboot(DIR *d, int lvl) {
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struct dirent *de;
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int dfd, fd;
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dfd = dirfd(d);
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fd = openat(dfd, "uevent", O_WRONLY | O_CLOEXEC);
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if(fd >= 0) {
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write(fd, "add\n", 4);
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close(fd);
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}
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while((de = readdir(d))) {
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DIR *d2;
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if (de->d_name[0] == '.')
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continue;
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if (de->d_type != DT_DIR && lvl > 0)
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continue;
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fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY | O_CLOEXEC);
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if(fd < 0)
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continue;
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d2 = fdopendir(fd);
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if(d2 == 0)
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close(fd);
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else {
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do_coldboot(d2, lvl + 1);
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closedir(d2);
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}
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}
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}
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static void coldboot(const char *path) {
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DIR *d = opendir(path);
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if(d) {
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do_coldboot(d, 0);
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closedir(d);
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}
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}
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static int process_config(VolumeManager *vm, bool* has_adoptable, bool* has_quota) {
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fstab = fs_mgr_read_fstab_default();
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if (!fstab) {
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PLOG(ERROR) << "Failed to open default fstab";
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return -1;
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}
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/* Loop through entries looking for ones that vold manages */
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*has_adoptable = false;
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*has_quota = false;
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for (int i = 0; i < fstab->num_entries; i++) {
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if (fs_mgr_is_quota(&fstab->recs[i])) {
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*has_quota = true;
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}
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if (fs_mgr_is_voldmanaged(&fstab->recs[i])) {
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if (fs_mgr_is_nonremovable(&fstab->recs[i])) {
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LOG(WARNING) << "nonremovable no longer supported; ignoring volume";
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continue;
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}
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std::string sysPattern(fstab->recs[i].blk_device);
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std::string nickname(fstab->recs[i].label);
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int flags = 0;
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if (fs_mgr_is_encryptable(&fstab->recs[i])) {
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flags |= android::vold::Disk::Flags::kAdoptable;
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*has_adoptable = true;
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}
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if (fs_mgr_is_noemulatedsd(&fstab->recs[i])
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|| property_get_bool("vold.debug.default_primary", false)) {
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flags |= android::vold::Disk::Flags::kDefaultPrimary;
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}
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vm->addDiskSource(std::shared_ptr<VolumeManager::DiskSource>(
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new VolumeManager::DiskSource(sysPattern, nickname, flags)));
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}
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}
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return 0;
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}
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