Volume.cpp revision 850949485b390c0928ea2f4a7db47be73bebb718
1f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat/* 2f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * Copyright (C) 2008 The Android Open Source Project 3f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * 4f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * Licensed under the Apache License, Version 2.0 (the "License"); 5f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * you may not use this file except in compliance with the License. 6f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * You may obtain a copy of the License at 7f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * 8f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * http://www.apache.org/licenses/LICENSE-2.0 9f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * 10f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * Unless required by applicable law or agreed to in writing, software 11f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * distributed under the License is distributed on an "AS IS" BASIS, 12f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * See the License for the specific language governing permissions and 14f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * limitations under the License. 15f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat */ 16f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 1749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <stdlib.h> 18f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include <string.h> 1949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <dirent.h> 2049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <errno.h> 2149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <fcntl.h> 2249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 2349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <sys/types.h> 2449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <sys/stat.h> 2549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <sys/types.h> 2649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <sys/mman.h> 27a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat#include <sys/mount.h> 28a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 29a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat#include <linux/kdev_t.h> 3037dcda68d334f70e1f7f69a9817def65fe3ee717Olivier Bailly#include <linux/fs.h> 31a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 32a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat#include <cutils/properties.h> 33a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 342a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat#include <diskconfig/diskconfig.h> 35f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 369092b1dbd31406f6939045fbef70a297b8dbeb62Mike Lockwood#include <private/android_filesystem_config.h> 379092b1dbd31406f6939045fbef70a297b8dbeb62Mike Lockwood 38f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#define LOG_TAG "Vold" 39f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 40f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include <cutils/log.h> 41f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 42f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include "Volume.h" 43a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat#include "VolumeManager.h" 44a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat#include "ResponseCode.h" 45bf04185c88161f13118b9975cdff7967d49a4fa0San Mehat#include "Fat.h" 46586536c60b773e3517531ad8a6cb0de6722c67fcSan Mehat#include "Process.h" 47f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 48a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehatextern "C" void dos_partition_dec(void const *pp, struct dos_partition *d); 49a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehatextern "C" void dos_partition_enc(void *pp, struct dos_partition *d); 5049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 513bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 523bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat/* 533bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Secure directory - stuff that only root can see 543bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 553bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehatconst char *Volume::SECDIR = "/mnt/secure"; 563bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 573bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat/* 583bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Secure staging directory - where media is mounted for preparation 593bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 603bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehatconst char *Volume::SEC_STGDIR = "/mnt/secure/staging"; 613bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 623bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat/* 633bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Path to the directory on the media which contains publicly accessable 643bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * asec imagefiles. This path will be obscured before the mount is 653bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * exposed to non priviledged users. 663bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 6752c2ccb6d25b94b96685efd4803226727710fbaeSan Mehatconst char *Volume::SEC_STG_SECIMGDIR = "/mnt/secure/staging/.android_secure"; 683bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 693bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat/* 703bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Path to where *only* root can access asec imagefiles 713bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 723bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehatconst char *Volume::SEC_ASECDIR = "/mnt/secure/asec"; 733bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 743bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat/* 753bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Path to where secure containers are mounted 763bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 773bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehatconst char *Volume::ASECDIR = "/mnt/asec"; 783bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 79fb7c4d5a8a1031cf0e493ff182dcf458e5fe8c77Kenny Root/* 80508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root * Path to where OBBs are mounted 81fb7c4d5a8a1031cf0e493ff182dcf458e5fe8c77Kenny Root */ 82508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Rootconst char *Volume::LOOPDIR = "/mnt/obb"; 83fb7c4d5a8a1031cf0e493ff182dcf458e5fe8c77Kenny Root 84a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehatstatic const char *stateToStr(int state) { 85a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat if (state == Volume::State_Init) 86a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return "Initializing"; 87a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat else if (state == Volume::State_NoMedia) 88a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return "No-Media"; 89a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat else if (state == Volume::State_Idle) 90a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return "Idle-Unmounted"; 91a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat else if (state == Volume::State_Pending) 92a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return "Pending"; 93a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat else if (state == Volume::State_Mounted) 94a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return "Mounted"; 95a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat else if (state == Volume::State_Unmounting) 96a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return "Unmounting"; 97a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat else if (state == Volume::State_Checking) 98a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return "Checking"; 99a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat else if (state == Volume::State_Formatting) 100a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return "Formatting"; 101a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat else if (state == Volume::State_Shared) 102a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return "Shared-Unmounted"; 103a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat else if (state == Volume::State_SharedMnt) 104a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return "Shared-Mounted"; 105a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat else 106a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return "Unknown-Error"; 107a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat} 10849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 109a2677e4ad01f250b0765f04adf0acfa6627efc98San MehatVolume::Volume(VolumeManager *vm, const char *label, const char *mount_point) { 110a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat mVm = vm; 111d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat mDebug = false; 112f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat mLabel = strdup(label); 113f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat mMountpoint = strdup(mount_point); 114f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat mState = Volume::State_Init; 115a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat mCurrentlyMountedKdev = -1; 116a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood mPartIdx = -1; 117f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat} 118f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 119f1b736bc5605e92e917ab27f5abf3ba839be2270San MehatVolume::~Volume() { 120f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat free(mLabel); 121f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat free(mMountpoint); 122f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat} 123f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 124cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehatvoid Volume::protectFromAutorunStupidity() { 125cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat char filename[255]; 126cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat 127cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat snprintf(filename, sizeof(filename), "%s/autorun.inf", SEC_STGDIR); 128cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat if (!access(filename, F_OK)) { 12997ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGW("Volume contains an autorun.inf! - removing"); 130cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat /* 131cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat * Ensure the filename is all lower-case so 132cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat * the process killer can find the inode. 133cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat * Probably being paranoid here but meh. 134cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat */ 135cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat rename(filename, filename); 136cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat Process::killProcessesWithOpenFiles(filename, 2); 137cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat if (unlink(filename)) { 13897ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to remove %s (%s)", filename, strerror(errno)); 139cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat } 140cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat } 141cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat} 142cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat 143d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehatvoid Volume::setDebug(bool enable) { 144d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat mDebug = enable; 145d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat} 146d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 147a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehatdev_t Volume::getDiskDevice() { 148a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return MKDEV(0, 0); 149a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat}; 150a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 1512dfe297ec47559dbe2297a72bea71cf515c03797Mike Lockwooddev_t Volume::getShareDevice() { 1522dfe297ec47559dbe2297a72bea71cf515c03797Mike Lockwood return getDiskDevice(); 1532dfe297ec47559dbe2297a72bea71cf515c03797Mike Lockwood} 1542dfe297ec47559dbe2297a72bea71cf515c03797Mike Lockwood 155a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehatvoid Volume::handleVolumeShared() { 156a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat} 157a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 158a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehatvoid Volume::handleVolumeUnshared() { 159a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat} 160a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 161fd7f5875129adfe2845f4f3fffb17db3a89eea25San Mehatint Volume::handleBlockEvent(NetlinkEvent *evt) { 162f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat errno = ENOSYS; 163f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat return -1; 164f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat} 165f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 166f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehatvoid Volume::setState(int state) { 167a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat char msg[255]; 168a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat int oldState = mState; 169a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 170a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat if (oldState == state) { 17197ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGW("Duplicate state (%d)\n", state); 172a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return; 173a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 174a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 175f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat mState = state; 176a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 17797ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGD("Volume %s state changing %d (%s) -> %d (%s)", mLabel, 178a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat oldState, stateToStr(oldState), mState, stateToStr(mState)); 179a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat snprintf(msg, sizeof(msg), 180a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat "Volume %s %s state changed from %d (%s) to %d (%s)", getLabel(), 181a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat getMountpoint(), oldState, stateToStr(oldState), mState, 182a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat stateToStr(mState)); 183a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 184a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat mVm->getBroadcaster()->sendBroadcast(ResponseCode::VolumeStateChange, 185a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat msg, false); 186f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat} 18749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 188dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehatint Volume::createDeviceNode(const char *path, int major, int minor) { 189dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat mode_t mode = 0660 | S_IFBLK; 190dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat dev_t dev = (major << 8) | minor; 191dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat if (mknod(path, mode, dev) < 0) { 192dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat if (errno != EEXIST) { 193dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat return -1; 194dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat } 195dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat } 196dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat return 0; 197dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat} 198dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat 199a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehatint Volume::formatVol() { 20049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 201a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat if (getState() == Volume::State_NoMedia) { 202a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat errno = ENODEV; 20349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat return -1; 204a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } else if (getState() != Volume::State_Idle) { 205a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat errno = EBUSY; 206a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return -1; 207a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 208a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 209a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat if (isMountpointMounted(getMountpoint())) { 21097ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGW("Volume is idle but appears to be mounted - fixing"); 211a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat setState(Volume::State_Mounted); 212a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat // mCurrentlyMountedKdev = XXX 213a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat errno = EBUSY; 214a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return -1; 215a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 216a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 217a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood bool formatEntireDevice = (mPartIdx == -1); 218a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat char devicePath[255]; 219a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat dev_t diskNode = getDiskDevice(); 220a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood dev_t partNode = MKDEV(MAJOR(diskNode), (formatEntireDevice ? 1 : mPartIdx)); 221a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 2222a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat setState(Volume::State_Formatting); 223a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 22464382de1f93b84ca59f607da4b4fdbd77f1af67dChih-Wei Huang int ret = -1; 225a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood // Only initialize the MBR if we are formatting the entire device 226a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood if (formatEntireDevice) { 227a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood sprintf(devicePath, "/dev/block/vold/%d:%d", 228a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood MAJOR(diskNode), MINOR(diskNode)); 229a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood 230a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood if (initializeMbr(devicePath)) { 231a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood SLOGE("Failed to initialize MBR (%s)", strerror(errno)); 232a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood goto err; 233a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood } 234a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 235a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 236a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat sprintf(devicePath, "/dev/block/vold/%d:%d", 237a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat MAJOR(partNode), MINOR(partNode)); 238a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 239a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood if (mDebug) { 240a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood SLOGI("Formatting volume %s (%s)", getLabel(), devicePath); 241a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood } 242a4886f1f8ed72e24a302a91a0ab18bc54b6f585eMike Lockwood 243fcf24fe62f98c5d44431aa575555569c2c7a29b0San Mehat if (Fat::format(devicePath, 0)) { 24497ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to format (%s)", strerror(errno)); 245a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat goto err; 246a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 247a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 24864382de1f93b84ca59f607da4b4fdbd77f1af67dChih-Wei Huang ret = 0; 24964382de1f93b84ca59f607da4b4fdbd77f1af67dChih-Wei Huang 250a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehaterr: 25164382de1f93b84ca59f607da4b4fdbd77f1af67dChih-Wei Huang setState(Volume::State_Idle); 25264382de1f93b84ca59f607da4b4fdbd77f1af67dChih-Wei Huang return ret; 253a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat} 254a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 255a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehatbool Volume::isMountpointMounted(const char *path) { 256a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat char device[256]; 257a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat char mount_path[256]; 258a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat char rest[256]; 259a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat FILE *fp; 260a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat char line[1024]; 261a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 262a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat if (!(fp = fopen("/proc/mounts", "r"))) { 26397ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Error opening /proc/mounts (%s)", strerror(errno)); 264a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return false; 26549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 26649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 267a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat while(fgets(line, sizeof(line), fp)) { 268a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat line[strlen(line)-1] = '\0'; 269a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat sscanf(line, "%255s %255s %255s\n", device, mount_path, rest); 270a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat if (!strcmp(mount_path, path)) { 271a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat fclose(fp); 272a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return true; 273a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 274dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat 275a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 276dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat 277a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat fclose(fp); 278a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return false; 279a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat} 280a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 281a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehatint Volume::mountVol() { 282a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat dev_t deviceNodes[4]; 283a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat int n, i, rc = 0; 284a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat char errmsg[255]; 285850949485b390c0928ea2f4a7db47be73bebb718Mike Lockwood const char* externalStorage = getenv("EXTERNAL_STORAGE"); 286850949485b390c0928ea2f4a7db47be73bebb718Mike Lockwood bool primaryStorage = externalStorage && !strcmp(getMountpoint(), externalStorage); 287a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 288a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat if (getState() == Volume::State_NoMedia) { 289a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat snprintf(errmsg, sizeof(errmsg), 290a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat "Volume %s %s mount failed - no media", 291a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat getLabel(), getMountpoint()); 292a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat mVm->getBroadcaster()->sendBroadcast( 293a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat ResponseCode::VolumeMountFailedNoMedia, 294a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat errmsg, false); 295a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat errno = ENODEV; 296a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return -1; 297a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } else if (getState() != Volume::State_Idle) { 298a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat errno = EBUSY; 29949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat return -1; 30049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 30149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 302a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat if (isMountpointMounted(getMountpoint())) { 30397ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGW("Volume is idle but appears to be mounted - fixing"); 304a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat setState(Volume::State_Mounted); 305a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat // mCurrentlyMountedKdev = XXX 306a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return 0; 307a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 308a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 309a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat n = getDeviceNodes((dev_t *) &deviceNodes, 4); 310a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat if (!n) { 31197ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to get device nodes (%s)\n", strerror(errno)); 31249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat return -1; 31349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 31449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 315a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat for (i = 0; i < n; i++) { 316a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat char devicePath[255]; 317dd9b8e92aaf330b48ddb40a7380588ef92b53de6San Mehat 318a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat sprintf(devicePath, "/dev/block/vold/%d:%d", MAJOR(deviceNodes[i]), 319a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat MINOR(deviceNodes[i])); 320a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 32197ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGI("%s being considered for volume %s\n", devicePath, getLabel()); 322a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 323a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat errno = 0; 324bf04185c88161f13118b9975cdff7967d49a4fa0San Mehat setState(Volume::State_Checking); 325bf04185c88161f13118b9975cdff7967d49a4fa0San Mehat 3263bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (Fat::check(devicePath)) { 327a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat if (errno == ENODATA) { 32897ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGW("%s does not contain a FAT filesystem\n", devicePath); 329a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat continue; 330a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 331eba65e9d438a05f1c5dfd0f8d31bc463a5d08eeeSan Mehat errno = EIO; 332eba65e9d438a05f1c5dfd0f8d31bc463a5d08eeeSan Mehat /* Badness - abort the mount */ 33397ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("%s failed FS checks (%s)", devicePath, strerror(errno)); 334eba65e9d438a05f1c5dfd0f8d31bc463a5d08eeeSan Mehat setState(Volume::State_Idle); 335eba65e9d438a05f1c5dfd0f8d31bc463a5d08eeeSan Mehat return -1; 336a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 337a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 3383bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat /* 3393bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Mount the device on our internal staging mountpoint so we can 3403bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * muck with it before exposing it to non priviledged users. 3413bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 342a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat errno = 0; 3439092b1dbd31406f6939045fbef70a297b8dbeb62Mike Lockwood int gid; 3449092b1dbd31406f6939045fbef70a297b8dbeb62Mike Lockwood 345850949485b390c0928ea2f4a7db47be73bebb718Mike Lockwood if (primaryStorage) { 3469092b1dbd31406f6939045fbef70a297b8dbeb62Mike Lockwood // Special case the primary SD card. 3479092b1dbd31406f6939045fbef70a297b8dbeb62Mike Lockwood // For this we grant write access to the SDCARD_RW group. 3489092b1dbd31406f6939045fbef70a297b8dbeb62Mike Lockwood gid = AID_SDCARD_RW; 3499092b1dbd31406f6939045fbef70a297b8dbeb62Mike Lockwood } else { 3509092b1dbd31406f6939045fbef70a297b8dbeb62Mike Lockwood // For secondary external storage we keep things locked up. 3519092b1dbd31406f6939045fbef70a297b8dbeb62Mike Lockwood gid = AID_MEDIA_RW; 3529092b1dbd31406f6939045fbef70a297b8dbeb62Mike Lockwood } 353a3e06084564c86ff618c40f185f3676b8b629b94Kenny Root if (Fat::doMount(devicePath, "/mnt/secure/staging", false, false, false, 3549092b1dbd31406f6939045fbef70a297b8dbeb62Mike Lockwood AID_SYSTEM, gid, 0702, true)) { 35597ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("%s failed to mount via VFAT (%s)\n", devicePath, strerror(errno)); 3563bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat continue; 357a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 358a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 35997ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGI("Device %s, target %s mounted @ /mnt/secure/staging", devicePath, getMountpoint()); 3603bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 361cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat protectFromAutorunStupidity(); 362cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat 363850949485b390c0928ea2f4a7db47be73bebb718Mike Lockwood // only create android_secure on primary storage 364850949485b390c0928ea2f4a7db47be73bebb718Mike Lockwood if (primaryStorage && createBindMounts()) { 36597ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to create bindmounts (%s)", strerror(errno)); 3663bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat umount("/mnt/secure/staging"); 3673bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat setState(Volume::State_Idle); 3683bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 3693bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 3703bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 3713bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat /* 3723bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Now that the bindmount trickery is done, atomically move the 3733bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * whole subtree to expose it to non priviledged users. 3743bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 3753bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (doMoveMount("/mnt/secure/staging", getMountpoint(), false)) { 37697ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to move mount (%s)", strerror(errno)); 3773bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat umount("/mnt/secure/staging"); 3783bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat setState(Volume::State_Idle); 3793bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 3803bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 3813bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat setState(Volume::State_Mounted); 3823bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat mCurrentlyMountedKdev = deviceNodes[i]; 3833bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return 0; 384a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 385a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 38697ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Volume %s found no suitable devices for mounting :(\n", getLabel()); 38749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat setState(Volume::State_Idle); 388a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 389eba65e9d438a05f1c5dfd0f8d31bc463a5d08eeeSan Mehat return -1; 390a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat} 391a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 3923bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehatint Volume::createBindMounts() { 3933bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat unsigned long flags; 3943bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 3953bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat /* 39652c2ccb6d25b94b96685efd4803226727710fbaeSan Mehat * Rename old /android_secure -> /.android_secure 39752c2ccb6d25b94b96685efd4803226727710fbaeSan Mehat */ 39852c2ccb6d25b94b96685efd4803226727710fbaeSan Mehat if (!access("/mnt/secure/staging/android_secure", R_OK | X_OK) && 39952c2ccb6d25b94b96685efd4803226727710fbaeSan Mehat access(SEC_STG_SECIMGDIR, R_OK | X_OK)) { 40052c2ccb6d25b94b96685efd4803226727710fbaeSan Mehat if (rename("/mnt/secure/staging/android_secure", SEC_STG_SECIMGDIR)) { 40197ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to rename legacy asec dir (%s)", strerror(errno)); 40252c2ccb6d25b94b96685efd4803226727710fbaeSan Mehat } 40352c2ccb6d25b94b96685efd4803226727710fbaeSan Mehat } 40452c2ccb6d25b94b96685efd4803226727710fbaeSan Mehat 40552c2ccb6d25b94b96685efd4803226727710fbaeSan Mehat /* 4063bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Ensure that /android_secure exists and is a directory 4073bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 4083bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (access(SEC_STG_SECIMGDIR, R_OK | X_OK)) { 4093bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (errno == ENOENT) { 4103bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (mkdir(SEC_STG_SECIMGDIR, 0777)) { 41197ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to create %s (%s)", SEC_STG_SECIMGDIR, strerror(errno)); 4123bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 4133bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 4143bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } else { 41597ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to access %s (%s)", SEC_STG_SECIMGDIR, strerror(errno)); 4163bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 4173bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 4183bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } else { 4193bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat struct stat sbuf; 420a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 4213bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (stat(SEC_STG_SECIMGDIR, &sbuf)) { 42297ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to stat %s (%s)", SEC_STG_SECIMGDIR, strerror(errno)); 4233bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 4243bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 4253bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (!S_ISDIR(sbuf.st_mode)) { 42697ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("%s is not a directory", SEC_STG_SECIMGDIR); 4273bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat errno = ENOTDIR; 4283bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 4293bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 4303bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 4313bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 4323bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat /* 4333bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Bind mount /mnt/secure/staging/android_secure -> /mnt/secure/asec so we'll 4343bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * have a root only accessable mountpoint for it. 4353bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 4363bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (mount(SEC_STG_SECIMGDIR, SEC_ASECDIR, "", MS_BIND, NULL)) { 43797ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to bind mount points %s -> %s (%s)", 4383bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat SEC_STG_SECIMGDIR, SEC_ASECDIR, strerror(errno)); 439a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return -1; 440a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 441a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 4423bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat /* 4433bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Mount a read-only, zero-sized tmpfs on <mountpoint>/android_secure to 4443bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * obscure the underlying directory from everybody - sneaky eh? ;) 4453bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 4463bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (mount("tmpfs", SEC_STG_SECIMGDIR, "tmpfs", MS_RDONLY, "size=0,mode=000,uid=0,gid=0")) { 44797ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to obscure %s (%s)", SEC_STG_SECIMGDIR, strerror(errno)); 4483bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat umount("/mnt/asec_secure"); 4493bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 4503bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 4513bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 4523bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return 0; 4533bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat} 4543bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 4553bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehatint Volume::doMoveMount(const char *src, const char *dst, bool force) { 4563bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat unsigned int flags = MS_MOVE; 4573bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat int retries = 5; 4583bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 4593bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat while(retries--) { 4603bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (!mount(src, dst, "", flags, NULL)) { 461d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat if (mDebug) { 46297ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGD("Moved mount %s -> %s sucessfully", src, dst); 463d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } 4643bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return 0; 4653bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } else if (errno != EBUSY) { 46697ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to move mount %s -> %s (%s)", src, dst, strerror(errno)); 4673bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 4683bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 4693bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat int action = 0; 4703bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 4713bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (force) { 4723bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (retries == 1) { 4733bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat action = 2; // SIGKILL 4743bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } else if (retries == 2) { 4753bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat action = 1; // SIGHUP 4763bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 477a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 47897ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGW("Failed to move %s -> %s (%s, retries %d, action %d)", 4793bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat src, dst, strerror(errno), retries, action); 4803bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat Process::killProcessesWithOpenFiles(src, action); 4813bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat usleep(1000*250); 4823bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 483a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 4843bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat errno = EBUSY; 48597ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Giving up on move %s -> %s (%s)", src, dst, strerror(errno)); 4863bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 4873bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat} 4883bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 4893bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehatint Volume::doUnmount(const char *path, bool force) { 4903bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat int retries = 10; 4913bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 492d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat if (mDebug) { 49397ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGD("Unmounting {%s}, force = %d", path, force); 494d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } 495d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 4963bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat while (retries--) { 4973bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (!umount(path) || errno == EINVAL || errno == ENOENT) { 49897ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGI("%s sucessfully unmounted", path); 4993bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return 0; 5003bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 5018c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat 5024ba8948dc16463053e21cda5744f519a555080d0San Mehat int action = 0; 5038c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat 5044ba8948dc16463053e21cda5744f519a555080d0San Mehat if (force) { 5053bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (retries == 1) { 5064ba8948dc16463053e21cda5744f519a555080d0San Mehat action = 2; // SIGKILL 5073bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } else if (retries == 2) { 5084ba8948dc16463053e21cda5744f519a555080d0San Mehat action = 1; // SIGHUP 5094ba8948dc16463053e21cda5744f519a555080d0San Mehat } 5104ba8948dc16463053e21cda5744f519a555080d0San Mehat } 5118c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat 51297ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGW("Failed to unmount %s (%s, retries %d, action %d)", 5133bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat path, strerror(errno), retries, action); 5143bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 5153bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat Process::killProcessesWithOpenFiles(path, action); 5164ba8948dc16463053e21cda5744f519a555080d0San Mehat usleep(1000*1000); 517a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 5183bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat errno = EBUSY; 51997ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Giving up on unmount %s (%s)", path, strerror(errno)); 5203bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 5213bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat} 522a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 5233bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehatint Volume::unmountVol(bool force) { 5243bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat int i, rc; 5253bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 5263bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (getState() != Volume::State_Mounted) { 52797ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Volume %s unmount request when not mounted", getLabel()); 5283bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat errno = EINVAL; 5293bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 5303bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 5313bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 5323bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat setState(Volume::State_Unmounting); 5333bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat usleep(1000 * 1000); // Give the framework some time to react 5343bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 5353bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat /* 5363bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * First move the mountpoint back to our internal staging point 5373bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * so nobody else can muck with it while we work. 5383bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 5393bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (doMoveMount(getMountpoint(), SEC_STGDIR, force)) { 54097ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to move mount %s => %s (%s)", getMountpoint(), SEC_STGDIR, strerror(errno)); 5413bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat setState(Volume::State_Mounted); 5423bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 5433bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 5443bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 545cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat protectFromAutorunStupidity(); 546cb4dac8a5243f6673b0590019b5b28a01bd3e343San Mehat 5473bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat /* 5483bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Unmount the tmpfs which was obscuring the asec image directory 5493bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * from non root users 5503bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 5513bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 5523bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (doUnmount(Volume::SEC_STG_SECIMGDIR, force)) { 55397ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to unmount tmpfs on %s (%s)", SEC_STG_SECIMGDIR, strerror(errno)); 5543bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat goto fail_republish; 5553bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 5563bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 5573bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat /* 5583bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Remove the bindmount we were using to keep a reference to 5593bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * the previously obscured directory. 5603bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 5613bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 5623bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (doUnmount(Volume::SEC_ASECDIR, force)) { 56397ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to remove bindmount on %s (%s)", SEC_ASECDIR, strerror(errno)); 5643bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat goto fail_remount_tmpfs; 5653bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 5663bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 5673bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat /* 5683bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Finally, unmount the actual block device from the staging dir 5693bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 5703bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (doUnmount(Volume::SEC_STGDIR, force)) { 57197ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to unmount %s (%s)", SEC_STGDIR, strerror(errno)); 5723bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat goto fail_recreate_bindmount; 5733bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 5743bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 57597ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGI("%s unmounted sucessfully", getMountpoint()); 5763bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 5773bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat setState(Volume::State_Idle); 5783bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat mCurrentlyMountedKdev = -1; 5793bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return 0; 5803bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 5813bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat /* 5823bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat * Failure handling - try to restore everything back the way it was 5833bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat */ 5843bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehatfail_recreate_bindmount: 5853bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (mount(SEC_STG_SECIMGDIR, SEC_ASECDIR, "", MS_BIND, NULL)) { 58697ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to restore bindmount after failure! - Storage will appear offline!"); 5873bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat goto out_nomedia; 5883bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 5893bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehatfail_remount_tmpfs: 5903bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (mount("tmpfs", SEC_STG_SECIMGDIR, "tmpfs", MS_RDONLY, "size=0,mode=0,uid=0,gid=0")) { 59197ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to restore tmpfs after failure! - Storage will appear offline!"); 5923bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat goto out_nomedia; 5933bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat } 5943bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehatfail_republish: 5953bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat if (doMoveMount(SEC_STGDIR, getMountpoint(), force)) { 59697ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to republish mount after failure! - Storage will appear offline!"); 5973bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat goto out_nomedia; 598a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 599a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 600a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat setState(Volume::State_Mounted); 601a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return -1; 6023bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat 6033bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehatout_nomedia: 6043bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat setState(Volume::State_NoMedia); 6053bb6020e461e8872e8df0775cba6eb32e06b93ecSan Mehat return -1; 606a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat} 607a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehatint Volume::initializeMbr(const char *deviceNode) { 6082a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat struct disk_info dinfo; 609a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 6102a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat memset(&dinfo, 0, sizeof(dinfo)); 611a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 6122a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat if (!(dinfo.part_lst = (struct part_info *) malloc(MAX_NUM_PARTS * sizeof(struct part_info)))) { 61397ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to malloc prt_lst"); 614a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat return -1; 615a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 616a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 6172a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat memset(dinfo.part_lst, 0, MAX_NUM_PARTS * sizeof(struct part_info)); 6182a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat dinfo.device = strdup(deviceNode); 6192a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat dinfo.scheme = PART_SCHEME_MBR; 6202a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat dinfo.sect_size = 512; 6212a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat dinfo.skip_lba = 2048; 6222a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat dinfo.num_lba = 0; 6232a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat dinfo.num_parts = 1; 624a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 6252a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat struct part_info *pinfo = &dinfo.part_lst[0]; 626a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 6272a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat pinfo->name = strdup("android_sdcard"); 6282a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat pinfo->flags |= PART_ACTIVE_FLAG; 6292a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat pinfo->type = PC_PART_TYPE_FAT32; 6302a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat pinfo->len_kb = -1; 631a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 6322a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat int rc = apply_disk_config(&dinfo, 0); 633a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat 6342a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat if (rc) { 63597ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to apply disk configuration (%d)", rc); 6362a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat goto out; 637a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat } 6382a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat 6392a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat out: 6402a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat free(pinfo->name); 6412a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat free(dinfo.device); 6422a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat free(dinfo.part_lst); 6432a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat 6442a5b8ce09b8836a8463ef9beaaff865c36ca5e6aSan Mehat return rc; 645a2677e4ad01f250b0765f04adf0acfa6627efc98San Mehat} 646