2 * Copyright (C) 2008 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
25 #include <sys/ioctl.h>
26 #include <sys/mount.h>
28 #include <sys/types.h>
32 #include <linux/kdev_t.h>
34 #define LOG_TAG "Vold"
36 #include <openssl/md5.h>
38 #include <android-base/logging.h>
39 #include <android-base/stringprintf.h>
40 #include <cutils/fs.h>
41 #include <cutils/log.h>
43 #include <selinux/android.h>
45 #include <sysutils/NetlinkEvent.h>
47 #include <private/android_filesystem_config.h>
49 #include "Benchmark.h"
50 #include "EmulatedVolume.h"
51 #include "VolumeManager.h"
52 #include "NetlinkManager.h"
53 #include "ResponseCode.h"
58 #include "Devmapper.h"
64 #define MASS_STORAGE_FILE_PATH "/sys/class/android_usb/android0/f_mass_storage/lun/file"
66 #define ROUND_UP_POWER_OF_2(number, po2) (((!!((number) & ((1U << (po2)) - 1))) << (po2))\
67 + ((number) & (~((1U << (po2)) - 1))))
69 using android::base::StringPrintf;
72 * Path to external storage where *only* root can access ASEC image files
74 const char *VolumeManager::SEC_ASECDIR_EXT = "/mnt/secure/asec";
77 * Path to internal storage where *only* root can access ASEC image files
79 const char *VolumeManager::SEC_ASECDIR_INT = "/data/app-asec";
82 * Path to where secure containers are mounted
84 const char *VolumeManager::ASECDIR = "/mnt/asec";
87 * Path to where OBBs are mounted
89 const char *VolumeManager::LOOPDIR = "/mnt/obb";
91 static const char* kPathUserMount = "/mnt/user";
92 static const char* kPathVirtualDisk = "/data/misc/vold/virtual_disk";
94 static const char* kPropVirtualDisk = "persist.sys.virtual_disk";
96 /* 512MiB is large enough for testing purposes */
97 static const unsigned int kSizeVirtualDisk = 536870912;
99 static const unsigned int kMajorBlockMmc = 179;
100 static const unsigned int kMajorBlockExperimentalMin = 240;
101 static const unsigned int kMajorBlockExperimentalMax = 254;
103 /* writes superblock at end of file or device given by name */
104 static int writeSuperBlock(const char* name, struct asec_superblock *sb, unsigned int numImgSectors) {
105 int sbfd = open(name, O_RDWR | O_CLOEXEC);
107 SLOGE("Failed to open %s for superblock write (%s)", name, strerror(errno));
111 if (lseek(sbfd, (numImgSectors * 512), SEEK_SET) < 0) {
112 SLOGE("Failed to lseek for superblock (%s)", strerror(errno));
117 if (write(sbfd, sb, sizeof(struct asec_superblock)) != sizeof(struct asec_superblock)) {
118 SLOGE("Failed to write superblock (%s)", strerror(errno));
126 static unsigned long adjustSectorNumExt4(unsigned long numSectors) {
127 // Ext4 started to reserve 2% or 4096 clusters, whichever is smaller for
128 // preventing costly operations or unexpected ENOSPC error.
129 // Ext4::format() uses default block size without clustering.
130 unsigned long clusterSectors = 4096 / 512;
131 unsigned long reservedSectors = (numSectors * 2)/100 + (numSectors % 50 > 0);
132 numSectors += reservedSectors > (4096 * clusterSectors) ? (4096 * clusterSectors) : reservedSectors;
133 return ROUND_UP_POWER_OF_2(numSectors, 3);
136 static unsigned long adjustSectorNumFAT(unsigned long numSectors) {
140 unsigned long fatSize = (((numSectors * 4) / 512) + 1) * 2;
141 numSectors += fatSize + 2;
143 * FAT is aligned to 32 kb with 512b sectors.
145 return ROUND_UP_POWER_OF_2(numSectors, 6);
148 static int setupLoopDevice(char* buffer, size_t len, const char* asecFileName, const char* idHash, bool debug) {
149 if (Loop::lookupActive(idHash, buffer, len)) {
150 if (Loop::create(idHash, asecFileName, buffer, len)) {
151 SLOGE("ASEC loop device creation failed for %s (%s)", asecFileName, strerror(errno));
155 SLOGD("New loop device created at %s", buffer);
159 SLOGD("Found active loopback for %s at %s", asecFileName, buffer);
165 static int setupDevMapperDevice(char* buffer, size_t len, const char* loopDevice, const char* asecFileName, const char* key, const char* idHash , unsigned long numImgSectors, bool* createdDMDevice, bool debug) {
166 if (strcmp(key, "none")) {
167 if (Devmapper::lookupActive(idHash, buffer, len)) {
168 if (Devmapper::create(idHash, loopDevice, key, numImgSectors,
170 SLOGE("ASEC device mapping failed for %s (%s)", asecFileName, strerror(errno));
174 SLOGD("New devmapper instance created at %s", buffer);
178 SLOGD("Found active devmapper for %s at %s", asecFileName, buffer);
181 *createdDMDevice = true;
183 strlcpy(buffer, loopDevice, len);
184 *createdDMDevice = false;
189 static void waitForDevMapper(const char *dmDevice) {
191 * Wait for the device mapper node to be created. Sometimes it takes a
192 * while. Wait for up to 1 second. We could also inspect incoming uevents,
193 * but that would take more effort.
197 if (!access(dmDevice, F_OK) || errno != ENOENT) {
204 VolumeManager *VolumeManager::sInstance = NULL;
206 VolumeManager *VolumeManager::Instance() {
208 sInstance = new VolumeManager();
212 VolumeManager::VolumeManager() {
214 mActiveContainers = new AsecIdCollection();
216 mUmsSharingCount = 0;
217 mSavedDirtyRatio = -1;
218 // set dirty ratio to 0 when UMS is active
222 VolumeManager::~VolumeManager() {
223 delete mActiveContainers;
226 char *VolumeManager::asecHash(const char *id, char *buffer, size_t len) {
227 static const char* digits = "0123456789abcdef";
229 unsigned char sig[MD5_DIGEST_LENGTH];
231 if (buffer == NULL) {
232 SLOGE("Destination buffer is NULL");
235 } else if (id == NULL) {
236 SLOGE("Source buffer is NULL");
239 } else if (len < MD5_ASCII_LENGTH_PLUS_NULL) {
240 SLOGE("Target hash buffer size < %d bytes (%zu)",
241 MD5_ASCII_LENGTH_PLUS_NULL, len);
246 MD5(reinterpret_cast<const unsigned char*>(id), strlen(id), sig);
249 for (int i = 0; i < MD5_DIGEST_LENGTH; i++) {
250 *p++ = digits[sig[i] >> 4];
251 *p++ = digits[sig[i] & 0x0F];
258 int VolumeManager::updateVirtualDisk() {
259 if (property_get_bool(kPropVirtualDisk, false)) {
260 if (access(kPathVirtualDisk, F_OK) != 0) {
261 Loop::createImageFile(kPathVirtualDisk, kSizeVirtualDisk / 512);
264 if (mVirtualDisk == nullptr) {
265 if (Loop::create(kPathVirtualDisk, mVirtualDiskPath) != 0) {
266 LOG(ERROR) << "Failed to create virtual disk";
271 if (stat(mVirtualDiskPath.c_str(), &buf) < 0) {
272 PLOG(ERROR) << "Failed to stat " << mVirtualDiskPath;
276 auto disk = new android::vold::Disk("virtual", buf.st_rdev, "virtual",
277 android::vold::Disk::Flags::kAdoptable | android::vold::Disk::Flags::kSd);
279 mVirtualDisk = std::shared_ptr<android::vold::Disk>(disk);
280 mDisks.push_back(mVirtualDisk);
283 if (mVirtualDisk != nullptr) {
284 dev_t device = mVirtualDisk->getDevice();
286 auto i = mDisks.begin();
287 while (i != mDisks.end()) {
288 if ((*i)->getDevice() == device) {
296 Loop::destroyByDevice(mVirtualDiskPath.c_str());
297 mVirtualDisk = nullptr;
300 if (access(kPathVirtualDisk, F_OK) == 0) {
301 unlink(kPathVirtualDisk);
307 int VolumeManager::setDebug(bool enable) {
312 int VolumeManager::start() {
313 // Always start from a clean slate by unmounting everything in
314 // directories that we own, in case we crashed.
317 // Assume that we always have an emulated volume on internal
318 // storage; the framework will decide if it should be mounted.
319 CHECK(mInternalEmulated == nullptr);
320 mInternalEmulated = std::shared_ptr<android::vold::VolumeBase>(
321 new android::vold::EmulatedVolume("/data/media"));
322 mInternalEmulated->create();
324 // Consider creating a virtual disk
330 int VolumeManager::stop() {
331 CHECK(mInternalEmulated != nullptr);
332 mInternalEmulated->destroy();
333 mInternalEmulated = nullptr;
337 void VolumeManager::handleBlockEvent(NetlinkEvent *evt) {
338 std::lock_guard<std::mutex> lock(mLock);
341 LOG(VERBOSE) << "----------------";
342 LOG(VERBOSE) << "handleBlockEvent with action " << (int) evt->getAction();
346 std::string eventPath(evt->findParam("DEVPATH")?evt->findParam("DEVPATH"):"");
347 std::string devType(evt->findParam("DEVTYPE")?evt->findParam("DEVTYPE"):"");
349 if (devType != "disk") return;
351 int major = atoi(evt->findParam("MAJOR"));
352 int minor = atoi(evt->findParam("MINOR"));
353 dev_t device = makedev(major, minor);
355 switch (evt->getAction()) {
356 case NetlinkEvent::Action::kAdd: {
357 for (const auto& source : mDiskSources) {
358 if (source->matches(eventPath)) {
359 // For now, assume that MMC and virtio-blk (the latter is
360 // emulator-specific; see Disk.cpp for details) devices are SD,
361 // and that everything else is USB
362 int flags = source->getFlags();
363 if (major == kMajorBlockMmc
364 || (android::vold::IsRunningInEmulator()
365 && major >= (int) kMajorBlockExperimentalMin
366 && major <= (int) kMajorBlockExperimentalMax)) {
367 flags |= android::vold::Disk::Flags::kSd;
369 flags |= android::vold::Disk::Flags::kUsb;
372 auto disk = new android::vold::Disk(eventPath, device,
373 source->getNickname(), flags);
375 mDisks.push_back(std::shared_ptr<android::vold::Disk>(disk));
381 case NetlinkEvent::Action::kChange: {
382 LOG(DEBUG) << "Disk at " << major << ":" << minor << " changed";
383 for (const auto& disk : mDisks) {
384 if (disk->getDevice() == device) {
385 disk->readMetadata();
386 disk->readPartitions();
391 case NetlinkEvent::Action::kRemove: {
392 auto i = mDisks.begin();
393 while (i != mDisks.end()) {
394 if ((*i)->getDevice() == device) {
404 LOG(WARNING) << "Unexpected block event action " << (int) evt->getAction();
410 void VolumeManager::addDiskSource(const std::shared_ptr<DiskSource>& diskSource) {
411 std::lock_guard<std::mutex> lock(mLock);
412 mDiskSources.push_back(diskSource);
415 std::shared_ptr<android::vold::Disk> VolumeManager::findDisk(const std::string& id) {
416 for (auto disk : mDisks) {
417 if (disk->getId() == id) {
424 std::shared_ptr<android::vold::VolumeBase> VolumeManager::findVolume(const std::string& id) {
425 if (mInternalEmulated->getId() == id) {
426 return mInternalEmulated;
428 for (const auto& disk : mDisks) {
429 auto vol = disk->findVolume(id);
430 if (vol != nullptr) {
437 void VolumeManager::listVolumes(android::vold::VolumeBase::Type type,
438 std::list<std::string>& list) {
440 for (const auto& disk : mDisks) {
441 disk->listVolumes(type, list);
445 nsecs_t VolumeManager::benchmarkPrivate(const std::string& id) {
447 if (id == "private" || id == "null") {
450 auto vol = findVolume(id);
451 if (vol != nullptr && vol->getState() == android::vold::VolumeBase::State::kMounted) {
452 path = vol->getPath();
457 LOG(WARNING) << "Failed to find volume for " << id;
461 return android::vold::BenchmarkPrivate(path);
464 int VolumeManager::forgetPartition(const std::string& partGuid) {
465 std::string normalizedGuid;
466 if (android::vold::NormalizeHex(partGuid, normalizedGuid)) {
467 LOG(WARNING) << "Invalid GUID " << partGuid;
471 std::string keyPath = android::vold::BuildKeyPath(normalizedGuid);
472 if (unlink(keyPath.c_str()) != 0) {
473 LOG(ERROR) << "Failed to unlink " << keyPath;
480 int VolumeManager::linkPrimary(userid_t userId) {
481 std::string source(mPrimary->getPath());
482 if (mPrimary->getType() == android::vold::VolumeBase::Type::kEmulated) {
483 source = StringPrintf("%s/%d", source.c_str(), userId);
484 fs_prepare_dir(source.c_str(), 0755, AID_ROOT, AID_ROOT);
487 std::string target(StringPrintf("/mnt/user/%d/primary", userId));
488 if (TEMP_FAILURE_RETRY(unlink(target.c_str()))) {
489 if (errno != ENOENT) {
490 SLOGW("Failed to unlink %s: %s", target.c_str(), strerror(errno));
493 LOG(DEBUG) << "Linking " << source << " to " << target;
494 if (TEMP_FAILURE_RETRY(symlink(source.c_str(), target.c_str()))) {
495 SLOGW("Failed to link %s to %s: %s", source.c_str(), target.c_str(),
502 int VolumeManager::onUserAdded(userid_t userId, int userSerialNumber) {
503 mAddedUsers[userId] = userSerialNumber;
507 int VolumeManager::onUserRemoved(userid_t userId) {
508 mAddedUsers.erase(userId);
512 int VolumeManager::onUserStarted(userid_t userId) {
513 // Note that sometimes the system will spin up processes from Zygote
514 // before actually starting the user, so we're okay if Zygote
515 // already created this directory.
516 std::string path(StringPrintf("%s/%d", kPathUserMount, userId));
517 fs_prepare_dir(path.c_str(), 0755, AID_ROOT, AID_ROOT);
519 mStartedUsers.insert(userId);
526 int VolumeManager::onUserStopped(userid_t userId) {
527 mStartedUsers.erase(userId);
531 int VolumeManager::setPrimary(const std::shared_ptr<android::vold::VolumeBase>& vol) {
533 for (userid_t userId : mStartedUsers) {
539 static int unmount_tree(const char* path) {
540 size_t path_len = strlen(path);
542 FILE* fp = setmntent("/proc/mounts", "r");
544 ALOGE("Error opening /proc/mounts: %s", strerror(errno));
548 // Some volumes can be stacked on each other, so force unmount in
549 // reverse order to give us the best chance of success.
550 std::list<std::string> toUnmount;
552 while ((mentry = getmntent(fp)) != NULL) {
553 if (strncmp(mentry->mnt_dir, path, path_len) == 0) {
554 toUnmount.push_front(std::string(mentry->mnt_dir));
559 for (const auto& path : toUnmount) {
560 if (umount2(path.c_str(), MNT_DETACH)) {
561 ALOGW("Failed to unmount %s: %s", path.c_str(), strerror(errno));
567 int VolumeManager::remountUid(uid_t uid, const std::string& mode) {
568 LOG(DEBUG) << "Remounting " << uid << " as mode " << mode;
572 char rootName[PATH_MAX];
573 char pidName[PATH_MAX];
579 if (!(dir = opendir("/proc"))) {
580 PLOG(ERROR) << "Failed to opendir";
584 // Figure out root namespace to compare against below
585 if (android::vold::SaneReadLinkAt(dirfd(dir), "1/ns/mnt", rootName, PATH_MAX) == -1) {
586 PLOG(ERROR) << "Failed to readlink";
591 // Poke through all running PIDs look for apps running as UID
592 while ((de = readdir(dir))) {
596 pidFd = openat(dirfd(dir), de->d_name, O_RDONLY | O_DIRECTORY | O_CLOEXEC);
600 if (fstat(pidFd, &sb) != 0) {
601 PLOG(WARNING) << "Failed to stat " << de->d_name;
604 if (sb.st_uid != uid) {
608 // Matches so far, but refuse to touch if in root namespace
609 LOG(DEBUG) << "Found matching PID " << de->d_name;
610 if (android::vold::SaneReadLinkAt(pidFd, "ns/mnt", pidName, PATH_MAX) == -1) {
611 PLOG(WARNING) << "Failed to read namespace for " << de->d_name;
614 if (!strcmp(rootName, pidName)) {
615 LOG(WARNING) << "Skipping due to root namespace";
619 // We purposefully leave the namespace open across the fork
620 nsFd = openat(pidFd, "ns/mnt", O_RDONLY); // not O_CLOEXEC
622 PLOG(WARNING) << "Failed to open namespace for " << de->d_name;
626 if (!(child = fork())) {
627 if (setns(nsFd, CLONE_NEWNS) != 0) {
628 PLOG(ERROR) << "Failed to setns for " << de->d_name;
632 unmount_tree("/storage");
634 std::string storageSource;
635 if (mode == "default") {
636 storageSource = "/mnt/runtime/default";
637 } else if (mode == "read") {
638 storageSource = "/mnt/runtime/read";
639 } else if (mode == "write") {
640 storageSource = "/mnt/runtime/write";
642 // Sane default of no storage visible
645 if (TEMP_FAILURE_RETRY(mount(storageSource.c_str(), "/storage",
646 NULL, MS_BIND | MS_REC, NULL)) == -1) {
647 PLOG(ERROR) << "Failed to mount " << storageSource << " for "
651 if (TEMP_FAILURE_RETRY(mount(NULL, "/storage", NULL,
652 MS_REC | MS_SLAVE, NULL)) == -1) {
653 PLOG(ERROR) << "Failed to set MS_SLAVE to /storage for "
658 // Mount user-specific symlink helper into place
659 userid_t user_id = multiuser_get_user_id(uid);
660 std::string userSource(StringPrintf("/mnt/user/%d", user_id));
661 if (TEMP_FAILURE_RETRY(mount(userSource.c_str(), "/storage/self",
662 NULL, MS_BIND, NULL)) == -1) {
663 PLOG(ERROR) << "Failed to mount " << userSource << " for "
672 PLOG(ERROR) << "Failed to fork";
675 TEMP_FAILURE_RETRY(waitpid(child, nullptr, 0));
686 int VolumeManager::reset() {
687 // Tear down all existing disks/volumes and start from a blank slate so
688 // newly connected framework hears all events.
689 mInternalEmulated->destroy();
690 mInternalEmulated->create();
691 for (const auto& disk : mDisks) {
697 mStartedUsers.clear();
701 // Can be called twice (sequentially) during shutdown. should be safe for that.
702 int VolumeManager::shutdown() {
703 if (mInternalEmulated == nullptr) {
704 return 0; // already shutdown
706 mInternalEmulated->destroy();
707 mInternalEmulated = nullptr;
708 for (const auto& disk : mDisks) {
715 int VolumeManager::unmountAll() {
716 std::lock_guard<std::mutex> lock(mLock);
718 // First, try gracefully unmounting all known devices
719 if (mInternalEmulated != nullptr) {
720 mInternalEmulated->unmount();
722 for (const auto& disk : mDisks) {
726 // Worst case we might have some stale mounts lurking around, so
727 // force unmount those just to be safe.
728 FILE* fp = setmntent("/proc/mounts", "r");
730 SLOGE("Error opening /proc/mounts: %s", strerror(errno));
734 // Some volumes can be stacked on each other, so force unmount in
735 // reverse order to give us the best chance of success.
736 std::list<std::string> toUnmount;
738 while ((mentry = getmntent(fp)) != NULL) {
739 if (strncmp(mentry->mnt_dir, "/mnt/", 5) == 0
740 || strncmp(mentry->mnt_dir, "/storage/", 9) == 0) {
741 toUnmount.push_front(std::string(mentry->mnt_dir));
746 for (const auto& path : toUnmount) {
747 SLOGW("Tearing down stale mount %s", path.c_str());
748 android::vold::ForceUnmount(path);
754 int VolumeManager::getObbMountPath(const char *sourceFile, char *mountPath, int mountPathLen) {
756 if (!asecHash(sourceFile, idHash, sizeof(idHash))) {
757 SLOGE("Hash of '%s' failed (%s)", sourceFile, strerror(errno));
761 memset(mountPath, 0, mountPathLen);
762 int written = snprintf(mountPath, mountPathLen, "%s/%s", VolumeManager::LOOPDIR, idHash);
763 if ((written < 0) || (written >= mountPathLen)) {
768 if (access(mountPath, F_OK)) {
776 int VolumeManager::getAsecMountPath(const char *id, char *buffer, int maxlen) {
777 char asecFileName[255];
779 if (!isLegalAsecId(id)) {
780 SLOGE("getAsecMountPath: Invalid asec id \"%s\"", id);
785 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
786 SLOGE("Couldn't find ASEC %s", id);
790 memset(buffer, 0, maxlen);
791 if (access(asecFileName, F_OK)) {
796 int written = snprintf(buffer, maxlen, "%s/%s", VolumeManager::ASECDIR, id);
797 if ((written < 0) || (written >= maxlen)) {
798 SLOGE("getAsecMountPath failed for %s: couldn't construct path in buffer", id);
806 int VolumeManager::getAsecFilesystemPath(const char *id, char *buffer, int maxlen) {
807 char asecFileName[255];
809 if (!isLegalAsecId(id)) {
810 SLOGE("getAsecFilesystemPath: Invalid asec id \"%s\"", id);
815 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
816 SLOGE("Couldn't find ASEC %s", id);
820 memset(buffer, 0, maxlen);
821 if (access(asecFileName, F_OK)) {
826 int written = snprintf(buffer, maxlen, "%s", asecFileName);
827 if ((written < 0) || (written >= maxlen)) {
835 int VolumeManager::createAsec(const char *id, unsigned long numSectors, const char *fstype,
836 const char *key, const int ownerUid, bool isExternal) {
837 struct asec_superblock sb;
838 memset(&sb, 0, sizeof(sb));
840 if (!isLegalAsecId(id)) {
841 SLOGE("createAsec: Invalid asec id \"%s\"", id);
846 const bool wantFilesystem = strcmp(fstype, "none");
847 bool usingExt4 = false;
848 if (wantFilesystem) {
849 usingExt4 = !strcmp(fstype, "ext4");
851 sb.c_opts |= ASEC_SB_C_OPTS_EXT4;
852 } else if (strcmp(fstype, "fat")) {
853 SLOGE("Invalid filesystem type %s", fstype);
859 sb.magic = ASEC_SB_MAGIC;
860 sb.ver = ASEC_SB_VER;
862 if (numSectors < ((1024*1024)/512)) {
863 SLOGE("Invalid container size specified (%lu sectors)", numSectors);
868 char asecFileName[255];
870 if (!findAsec(id, asecFileName, sizeof(asecFileName))) {
871 SLOGE("ASEC file '%s' currently exists - destroy it first! (%s)",
872 asecFileName, strerror(errno));
877 const char *asecDir = isExternal ? VolumeManager::SEC_ASECDIR_EXT : VolumeManager::SEC_ASECDIR_INT;
879 int written = snprintf(asecFileName, sizeof(asecFileName), "%s/%s.asec", asecDir, id);
880 if ((written < 0) || (size_t(written) >= sizeof(asecFileName))) {
885 if (!access(asecFileName, F_OK)) {
886 SLOGE("ASEC file '%s' currently exists - destroy it first! (%s)",
887 asecFileName, strerror(errno));
892 unsigned long numImgSectors;
894 numImgSectors = adjustSectorNumExt4(numSectors);
896 numImgSectors = adjustSectorNumFAT(numSectors);
898 // Add +1 for our superblock which is at the end
899 if (Loop::createImageFile(asecFileName, numImgSectors + 1)) {
900 SLOGE("ASEC image file creation failed (%s)", strerror(errno));
905 if (!asecHash(id, idHash, sizeof(idHash))) {
906 SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
907 unlink(asecFileName);
911 char loopDevice[255];
912 if (Loop::create(idHash, asecFileName, loopDevice, sizeof(loopDevice))) {
913 SLOGE("ASEC loop device creation failed (%s)", strerror(errno));
914 unlink(asecFileName);
919 bool cleanupDm = false;
921 if (strcmp(key, "none")) {
922 // XXX: This is all we support for now
923 sb.c_cipher = ASEC_SB_C_CIPHER_TWOFISH;
924 if (Devmapper::create(idHash, loopDevice, key, numImgSectors, dmDevice,
926 SLOGE("ASEC device mapping failed (%s)", strerror(errno));
927 Loop::destroyByDevice(loopDevice);
928 unlink(asecFileName);
933 sb.c_cipher = ASEC_SB_C_CIPHER_NONE;
934 strlcpy(dmDevice, loopDevice, sizeof(dmDevice));
938 * Drop down the superblock at the end of the file
940 if (writeSuperBlock(loopDevice, &sb, numImgSectors)) {
942 Devmapper::destroy(idHash);
944 Loop::destroyByDevice(loopDevice);
945 unlink(asecFileName);
949 if (wantFilesystem) {
951 char mountPoint[255];
953 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
954 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
955 SLOGE("ASEC fs format failed: couldn't construct mountPoint");
957 Devmapper::destroy(idHash);
959 Loop::destroyByDevice(loopDevice);
960 unlink(asecFileName);
965 formatStatus = android::vold::ext4::Format(dmDevice, numImgSectors, mountPoint);
967 formatStatus = android::vold::vfat::Format(dmDevice, numImgSectors);
970 if (formatStatus < 0) {
971 SLOGE("ASEC fs format failed (%s)", strerror(errno));
973 Devmapper::destroy(idHash);
975 Loop::destroyByDevice(loopDevice);
976 unlink(asecFileName);
980 if (mkdir(mountPoint, 0000)) {
981 if (errno != EEXIST) {
982 SLOGE("Mountpoint creation failed (%s)", strerror(errno));
984 Devmapper::destroy(idHash);
986 Loop::destroyByDevice(loopDevice);
987 unlink(asecFileName);
994 mountStatus = android::vold::ext4::Mount(dmDevice, mountPoint,
995 false, false, false);
997 mountStatus = android::vold::vfat::Mount(dmDevice, mountPoint,
998 false, false, false, ownerUid, 0, 0000, false);
1002 SLOGE("ASEC FAT mount failed (%s)", strerror(errno));
1004 Devmapper::destroy(idHash);
1006 Loop::destroyByDevice(loopDevice);
1007 unlink(asecFileName);
1012 int dirfd = open(mountPoint, O_DIRECTORY | O_CLOEXEC);
1014 if (fchown(dirfd, ownerUid, AID_SYSTEM)
1015 || fchmod(dirfd, S_IRUSR | S_IWUSR | S_IXUSR | S_ISGID | S_IRGRP | S_IXGRP)) {
1016 SLOGI("Cannot chown/chmod new ASEC mount point %s", mountPoint);
1022 SLOGI("Created raw secure container %s (no filesystem)", id);
1025 mActiveContainers->push_back(new ContainerData(strdup(id), ASEC));
1029 int VolumeManager::resizeAsec(const char *id, unsigned long numSectors, const char *key) {
1030 char asecFileName[255];
1031 char mountPoint[255];
1032 bool cleanupDm = false;
1034 if (!isLegalAsecId(id)) {
1035 SLOGE("resizeAsec: Invalid asec id \"%s\"", id);
1040 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
1041 SLOGE("Couldn't find ASEC %s", id);
1045 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
1046 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1047 SLOGE("ASEC resize failed for %s: couldn't construct mountpoint", id);
1051 if (isMountpointMounted(mountPoint)) {
1052 SLOGE("ASEC %s mounted. Unmount before resizing", id);
1057 struct asec_superblock sb;
1059 unsigned long oldNumSec = 0;
1061 if ((fd = open(asecFileName, O_RDONLY | O_CLOEXEC)) < 0) {
1062 SLOGE("Failed to open ASEC file (%s)", strerror(errno));
1067 if (fstat(fd, &info) < 0) {
1068 SLOGE("Failed to get file size (%s)", strerror(errno));
1073 oldNumSec = info.st_size / 512;
1076 * Try to read superblock.
1078 memset(&sb, 0, sizeof(struct asec_superblock));
1079 if (lseek(fd, ((oldNumSec - 1) * 512), SEEK_SET) < 0) {
1080 SLOGE("lseek failed (%s)", strerror(errno));
1084 if (read(fd, &sb, sizeof(struct asec_superblock)) != sizeof(struct asec_superblock)) {
1085 SLOGE("superblock read failed (%s)", strerror(errno));
1092 SLOGD("Container sb magic/ver (%.8x/%.2x)", sb.magic, sb.ver);
1094 if (sb.magic != ASEC_SB_MAGIC || sb.ver != ASEC_SB_VER) {
1095 SLOGE("Bad container magic/version (%.8x/%.2x)", sb.magic, sb.ver);
1096 errno = EMEDIUMTYPE;
1100 unsigned long numImgSectors;
1101 if (!(sb.c_opts & ASEC_SB_C_OPTS_EXT4)) {
1102 SLOGE("Only ext4 partitions are supported for resize");
1106 numImgSectors = adjustSectorNumExt4(numSectors);
1110 * add one block for the superblock
1112 SLOGD("Resizing from %lu sectors to %lu sectors", oldNumSec, numImgSectors + 1);
1113 if (oldNumSec == numImgSectors + 1) {
1114 SLOGW("Size unchanged; ignoring resize request");
1116 } else if (oldNumSec > numImgSectors + 1) {
1117 SLOGE("Only growing is currently supported.");
1122 if (Loop::resizeImageFile(asecFileName, numImgSectors + 1)) {
1123 SLOGE("Resize of ASEC image file failed. Could not resize %s", id);
1128 * Drop down a copy of the superblock at the end of the file
1130 if (writeSuperBlock(asecFileName, &sb, numImgSectors))
1134 if (!asecHash(id, idHash, sizeof(idHash))) {
1135 SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
1139 char loopDevice[255];
1140 if (setupLoopDevice(loopDevice, sizeof(loopDevice), asecFileName, idHash, mDebug))
1145 if (setupDevMapperDevice(dmDevice, sizeof(dmDevice), loopDevice, asecFileName, key, idHash, numImgSectors, &cleanupDm, mDebug)) {
1146 Loop::destroyByDevice(loopDevice);
1151 * Wait for the device mapper node to be created.
1153 waitForDevMapper(dmDevice);
1155 if (android::vold::ext4::Resize(dmDevice, numImgSectors)) {
1156 SLOGE("Unable to resize %s (%s)", id, strerror(errno));
1158 Devmapper::destroy(idHash);
1160 Loop::destroyByDevice(loopDevice);
1166 Loop::resizeImageFile(asecFileName, oldNumSec);
1170 int VolumeManager::finalizeAsec(const char *id) {
1171 char asecFileName[255];
1172 char loopDevice[255];
1173 char mountPoint[255];
1175 if (!isLegalAsecId(id)) {
1176 SLOGE("finalizeAsec: Invalid asec id \"%s\"", id);
1181 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
1182 SLOGE("Couldn't find ASEC %s", id);
1187 if (!asecHash(id, idHash, sizeof(idHash))) {
1188 SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
1192 if (Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
1193 SLOGE("Unable to finalize %s (%s)", id, strerror(errno));
1197 unsigned long nr_sec = 0;
1198 struct asec_superblock sb;
1200 if (Loop::lookupInfo(loopDevice, &sb, &nr_sec)) {
1204 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
1205 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1206 SLOGE("ASEC finalize failed: couldn't construct mountPoint");
1211 if (sb.c_opts & ASEC_SB_C_OPTS_EXT4) {
1212 result = android::vold::ext4::Mount(loopDevice, mountPoint,
1215 result = android::vold::vfat::Mount(loopDevice, mountPoint,
1216 true, true, true, 0, 0, 0227, false);
1220 SLOGE("ASEC finalize mount failed (%s)", strerror(errno));
1225 SLOGD("ASEC %s finalized", id);
1230 int VolumeManager::fixupAsecPermissions(const char *id, gid_t gid, const char* filename) {
1231 char asecFileName[255];
1232 char loopDevice[255];
1233 char mountPoint[255];
1235 if (gid < AID_APP) {
1236 SLOGE("Group ID is not in application range");
1240 if (!isLegalAsecId(id)) {
1241 SLOGE("fixupAsecPermissions: Invalid asec id \"%s\"", id);
1246 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
1247 SLOGE("Couldn't find ASEC %s", id);
1252 if (!asecHash(id, idHash, sizeof(idHash))) {
1253 SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
1257 if (Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
1258 SLOGE("Unable fix permissions during lookup on %s (%s)", id, strerror(errno));
1262 unsigned long nr_sec = 0;
1263 struct asec_superblock sb;
1265 if (Loop::lookupInfo(loopDevice, &sb, &nr_sec)) {
1269 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
1270 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1271 SLOGE("Unable remount to fix permissions for %s: couldn't construct mountpoint", id);
1276 if ((sb.c_opts & ASEC_SB_C_OPTS_EXT4) == 0) {
1280 int ret = android::vold::ext4::Mount(loopDevice, mountPoint,
1281 false /* read-only */,
1283 false /* executable */);
1285 SLOGE("Unable remount to fix permissions for %s (%s)", id, strerror(errno));
1289 char *paths[] = { mountPoint, NULL };
1291 FTS *fts = fts_open(paths, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL);
1293 // Traverse the entire hierarchy and chown to system UID.
1294 for (FTSENT *ftsent = fts_read(fts); ftsent != NULL; ftsent = fts_read(fts)) {
1295 // We don't care about the lost+found directory.
1296 if (!strcmp(ftsent->fts_name, "lost+found")) {
1301 * There can only be one file marked as private right now.
1302 * This should be more robust, but it satisfies the requirements
1303 * we have for right now.
1305 const bool privateFile = !strcmp(ftsent->fts_name, filename);
1307 int fd = open(ftsent->fts_accpath, O_NOFOLLOW | O_CLOEXEC);
1309 SLOGE("Couldn't open file %s: %s", ftsent->fts_accpath, strerror(errno));
1314 result |= fchown(fd, AID_SYSTEM, privateFile? gid : AID_SYSTEM);
1316 if (ftsent->fts_info & FTS_D) {
1317 result |= fchmod(fd, 0755);
1318 } else if (ftsent->fts_info & FTS_F) {
1319 result |= fchmod(fd, privateFile ? 0640 : 0644);
1322 if (selinux_android_restorecon(ftsent->fts_path, 0) < 0) {
1323 SLOGE("restorecon failed for %s: %s\n", ftsent->fts_path, strerror(errno));
1331 // Finally make the directory readable by everyone.
1332 int dirfd = open(mountPoint, O_DIRECTORY | O_CLOEXEC);
1333 if (dirfd < 0 || fchmod(dirfd, 0755)) {
1334 SLOGE("Couldn't change owner of existing directory %s: %s", mountPoint, strerror(errno));
1342 result |= android::vold::ext4::Mount(loopDevice, mountPoint,
1343 true /* read-only */,
1345 true /* execute */);
1348 SLOGE("ASEC fix permissions failed (%s)", strerror(errno));
1353 SLOGD("ASEC %s permissions fixed", id);
1358 int VolumeManager::renameAsec(const char *id1, const char *id2) {
1359 char asecFilename1[255];
1360 char *asecFilename2;
1361 char mountPoint[255];
1365 if (!isLegalAsecId(id1)) {
1366 SLOGE("renameAsec: Invalid asec id1 \"%s\"", id1);
1371 if (!isLegalAsecId(id2)) {
1372 SLOGE("renameAsec: Invalid asec id2 \"%s\"", id2);
1377 if (findAsec(id1, asecFilename1, sizeof(asecFilename1), &dir)) {
1378 SLOGE("Couldn't find ASEC %s", id1);
1382 asprintf(&asecFilename2, "%s/%s.asec", dir, id2);
1384 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id1);
1385 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1386 SLOGE("Rename failed: couldn't construct mountpoint");
1390 if (isMountpointMounted(mountPoint)) {
1391 SLOGW("Rename attempt when src mounted");
1396 written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id2);
1397 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1398 SLOGE("Rename failed: couldn't construct mountpoint2");
1402 if (isMountpointMounted(mountPoint)) {
1403 SLOGW("Rename attempt when dst mounted");
1408 if (!access(asecFilename2, F_OK)) {
1409 SLOGE("Rename attempt when dst exists");
1414 if (rename(asecFilename1, asecFilename2)) {
1415 SLOGE("Rename of '%s' to '%s' failed (%s)", asecFilename1, asecFilename2, strerror(errno));
1419 free(asecFilename2);
1423 free(asecFilename2);
1427 #define UNMOUNT_RETRIES 5
1428 #define UNMOUNT_SLEEP_BETWEEN_RETRY_MS (1000 * 1000)
1429 int VolumeManager::unmountAsec(const char *id, bool force) {
1430 char asecFileName[255];
1431 char mountPoint[255];
1433 if (!isLegalAsecId(id)) {
1434 SLOGE("unmountAsec: Invalid asec id \"%s\"", id);
1439 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
1440 SLOGE("Couldn't find ASEC %s", id);
1444 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
1445 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1446 SLOGE("ASEC unmount failed for %s: couldn't construct mountpoint", id);
1451 if (!asecHash(id, idHash, sizeof(idHash))) {
1452 SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
1456 return unmountLoopImage(id, idHash, asecFileName, mountPoint, force);
1459 int VolumeManager::unmountObb(const char *fileName, bool force) {
1460 char mountPoint[255];
1463 if (!asecHash(fileName, idHash, sizeof(idHash))) {
1464 SLOGE("Hash of '%s' failed (%s)", fileName, strerror(errno));
1468 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::LOOPDIR, idHash);
1469 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1470 SLOGE("OBB unmount failed for %s: couldn't construct mountpoint", fileName);
1474 return unmountLoopImage(fileName, idHash, fileName, mountPoint, force);
1477 int VolumeManager::unmountLoopImage(const char *id, const char *idHash,
1478 const char *fileName, const char *mountPoint, bool force) {
1479 if (!isMountpointMounted(mountPoint)) {
1480 SLOGE("Unmount request for %s when not mounted", id);
1486 for (i = 1; i <= UNMOUNT_RETRIES; i++) {
1487 rc = umount(mountPoint);
1491 if (rc && (errno == EINVAL || errno == ENOENT)) {
1492 SLOGI("Container %s unmounted OK", id);
1496 SLOGW("%s unmount attempt %d failed (%s)",
1497 id, i, strerror(errno));
1499 int signal = 0; // default is to just complain
1502 if (i > (UNMOUNT_RETRIES - 2))
1504 else if (i > (UNMOUNT_RETRIES - 3))
1508 Process::killProcessesWithOpenFiles(mountPoint, signal);
1509 usleep(UNMOUNT_SLEEP_BETWEEN_RETRY_MS);
1514 SLOGE("Failed to unmount container %s (%s)", id, strerror(errno));
1521 if (!rmdir(mountPoint)) {
1525 SLOGW("Failed to rmdir %s (%s)", mountPoint, strerror(errno));
1526 usleep(UNMOUNT_SLEEP_BETWEEN_RETRY_MS);
1530 SLOGE("Timed out trying to rmdir %s (%s)", mountPoint, strerror(errno));
1533 for (i=1; i <= UNMOUNT_RETRIES; i++) {
1534 if (Devmapper::destroy(idHash) && errno != ENXIO) {
1535 SLOGE("Failed to destroy devmapper instance (%s)", strerror(errno));
1536 usleep(UNMOUNT_SLEEP_BETWEEN_RETRY_MS);
1543 char loopDevice[255];
1544 if (!Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
1545 Loop::destroyByDevice(loopDevice);
1547 SLOGW("Failed to find loop device for {%s} (%s)", fileName, strerror(errno));
1550 AsecIdCollection::iterator it;
1551 for (it = mActiveContainers->begin(); it != mActiveContainers->end(); ++it) {
1552 ContainerData* cd = *it;
1553 if (!strcmp(cd->id, id)) {
1555 mActiveContainers->erase(it);
1559 if (it == mActiveContainers->end()) {
1560 SLOGW("mActiveContainers is inconsistent!");
1565 int VolumeManager::destroyAsec(const char *id, bool force) {
1566 char asecFileName[255];
1567 char mountPoint[255];
1569 if (!isLegalAsecId(id)) {
1570 SLOGE("destroyAsec: Invalid asec id \"%s\"", id);
1575 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
1576 SLOGE("Couldn't find ASEC %s", id);
1580 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
1581 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1582 SLOGE("ASEC destroy failed for %s: couldn't construct mountpoint", id);
1586 if (isMountpointMounted(mountPoint)) {
1588 SLOGD("Unmounting container before destroy");
1590 if (unmountAsec(id, force)) {
1591 SLOGE("Failed to unmount asec %s for destroy (%s)", id, strerror(errno));
1596 if (unlink(asecFileName)) {
1597 SLOGE("Failed to unlink asec '%s' (%s)", asecFileName, strerror(errno));
1602 SLOGD("ASEC %s destroyed", id);
1608 * Legal ASEC ids consist of alphanumeric characters, '-',
1609 * '_', or '.'. ".." is not allowed. The first or last character
1610 * of the ASEC id cannot be '.' (dot).
1612 bool VolumeManager::isLegalAsecId(const char *id) const {
1614 size_t len = strlen(id);
1619 if ((id[0] == '.') || (id[len - 1] == '.')) {
1623 for (i = 0; i < len; i++) {
1625 // i=0 is guaranteed never to have a dot. See above.
1626 if (id[i-1] == '.') return false;
1629 if (id[i] == '_' || id[i] == '-') continue;
1630 if (id[i] >= 'a' && id[i] <= 'z') continue;
1631 if (id[i] >= 'A' && id[i] <= 'Z') continue;
1632 if (id[i] >= '0' && id[i] <= '9') continue;
1639 bool VolumeManager::isAsecInDirectory(const char *dir, const char *asecName) const {
1640 int dirfd = open(dir, O_DIRECTORY | O_CLOEXEC);
1642 SLOGE("Couldn't open internal ASEC dir (%s)", strerror(errno));
1647 bool ret = (fstatat(dirfd, asecName, &sb, AT_SYMLINK_NOFOLLOW) == 0)
1648 && S_ISREG(sb.st_mode);
1655 int VolumeManager::findAsec(const char *id, char *asecPath, size_t asecPathLen,
1656 const char **directory) const {
1659 if (!isLegalAsecId(id)) {
1660 SLOGE("findAsec: Invalid asec id \"%s\"", id);
1665 if (asprintf(&asecName, "%s.asec", id) < 0) {
1666 SLOGE("Couldn't allocate string to write ASEC name");
1671 if (isAsecInDirectory(VolumeManager::SEC_ASECDIR_INT, asecName)) {
1672 dir = VolumeManager::SEC_ASECDIR_INT;
1673 } else if (isAsecInDirectory(VolumeManager::SEC_ASECDIR_EXT, asecName)) {
1674 dir = VolumeManager::SEC_ASECDIR_EXT;
1680 if (directory != NULL) {
1684 if (asecPath != NULL) {
1685 int written = snprintf(asecPath, asecPathLen, "%s/%s", dir, asecName);
1686 if ((written < 0) || (size_t(written) >= asecPathLen)) {
1687 SLOGE("findAsec failed for %s: couldn't construct ASEC path", id);
1697 int VolumeManager::mountAsec(const char *id, const char *key, int ownerUid, bool readOnly) {
1698 char asecFileName[255];
1699 char mountPoint[255];
1701 if (!isLegalAsecId(id)) {
1702 SLOGE("mountAsec: Invalid asec id \"%s\"", id);
1707 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
1708 SLOGE("Couldn't find ASEC %s", id);
1712 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
1713 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1714 SLOGE("ASEC mount failed for %s: couldn't construct mountpoint", id);
1718 if (isMountpointMounted(mountPoint)) {
1719 SLOGE("ASEC %s already mounted", id);
1725 if (!asecHash(id, idHash, sizeof(idHash))) {
1726 SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
1730 char loopDevice[255];
1731 if (setupLoopDevice(loopDevice, sizeof(loopDevice), asecFileName, idHash, mDebug))
1735 bool cleanupDm = false;
1737 unsigned long nr_sec = 0;
1738 struct asec_superblock sb;
1740 if (Loop::lookupInfo(loopDevice, &sb, &nr_sec)) {
1745 SLOGD("Container sb magic/ver (%.8x/%.2x)", sb.magic, sb.ver);
1747 if (sb.magic != ASEC_SB_MAGIC || sb.ver != ASEC_SB_VER) {
1748 SLOGE("Bad container magic/version (%.8x/%.2x)", sb.magic, sb.ver);
1749 Loop::destroyByDevice(loopDevice);
1750 errno = EMEDIUMTYPE;
1753 nr_sec--; // We don't want the devmapping to extend onto our superblock
1755 if (setupDevMapperDevice(dmDevice, sizeof(dmDevice), loopDevice, asecFileName, key, idHash , nr_sec, &cleanupDm, mDebug)) {
1756 Loop::destroyByDevice(loopDevice);
1760 if (mkdir(mountPoint, 0000)) {
1761 if (errno != EEXIST) {
1762 SLOGE("Mountpoint creation failed (%s)", strerror(errno));
1764 Devmapper::destroy(idHash);
1766 Loop::destroyByDevice(loopDevice);
1772 * Wait for the device mapper node to be created.
1774 waitForDevMapper(dmDevice);
1777 if (sb.c_opts & ASEC_SB_C_OPTS_EXT4) {
1778 result = android::vold::ext4::Mount(dmDevice, mountPoint,
1779 readOnly, false, readOnly);
1781 result = android::vold::vfat::Mount(dmDevice, mountPoint,
1782 readOnly, false, readOnly, ownerUid, 0, 0222, false);
1786 SLOGE("ASEC mount failed (%s)", strerror(errno));
1788 Devmapper::destroy(idHash);
1790 Loop::destroyByDevice(loopDevice);
1794 mActiveContainers->push_back(new ContainerData(strdup(id), ASEC));
1796 SLOGD("ASEC %s mounted", id);
1802 * Mounts an image file <code>img</code>.
1804 int VolumeManager::mountObb(const char *img, const char *key, int ownerGid) {
1805 char mountPoint[255];
1808 if (!asecHash(img, idHash, sizeof(idHash))) {
1809 SLOGE("Hash of '%s' failed (%s)", img, strerror(errno));
1813 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::LOOPDIR, idHash);
1814 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1815 SLOGE("OBB mount failed for %s: couldn't construct mountpoint", img);
1819 if (isMountpointMounted(mountPoint)) {
1820 SLOGE("Image %s already mounted", img);
1825 char loopDevice[255];
1826 if (setupLoopDevice(loopDevice, sizeof(loopDevice), img, idHash, mDebug))
1830 bool cleanupDm = false;
1832 unsigned long nr_sec = 0;
1834 if ((fd = open(loopDevice, O_RDWR | O_CLOEXEC)) < 0) {
1835 SLOGE("Failed to open loopdevice (%s)", strerror(errno));
1836 Loop::destroyByDevice(loopDevice);
1840 get_blkdev_size(fd, &nr_sec);
1842 SLOGE("Failed to get loop size (%s)", strerror(errno));
1843 Loop::destroyByDevice(loopDevice);
1850 if (setupDevMapperDevice(dmDevice, sizeof(loopDevice), loopDevice, img,key, idHash, nr_sec, &cleanupDm, mDebug)) {
1851 Loop::destroyByDevice(loopDevice);
1855 if (mkdir(mountPoint, 0755)) {
1856 if (errno != EEXIST) {
1857 SLOGE("Mountpoint creation failed (%s)", strerror(errno));
1859 Devmapper::destroy(idHash);
1861 Loop::destroyByDevice(loopDevice);
1867 * Wait for the device mapper node to be created.
1869 waitForDevMapper(dmDevice);
1871 if (android::vold::vfat::Mount(dmDevice, mountPoint,
1872 true, false, true, 0, ownerGid, 0227, false)) {
1873 SLOGE("Image mount failed (%s)", strerror(errno));
1875 Devmapper::destroy(idHash);
1877 Loop::destroyByDevice(loopDevice);
1881 mActiveContainers->push_back(new ContainerData(strdup(img), OBB));
1883 SLOGD("Image %s mounted", img);
1888 int VolumeManager::listMountedObbs(SocketClient* cli) {
1889 FILE *fp = setmntent("/proc/mounts", "r");
1891 SLOGE("Error opening /proc/mounts (%s)", strerror(errno));
1895 // Create a string to compare against that has a trailing slash
1896 int loopDirLen = strlen(VolumeManager::LOOPDIR);
1897 char loopDir[loopDirLen + 2];
1898 strlcpy(loopDir, VolumeManager::LOOPDIR, sizeof(loopDir));
1899 loopDir[loopDirLen++] = '/';
1900 loopDir[loopDirLen] = '\0';
1903 while ((mentry = getmntent(fp)) != NULL) {
1904 if (!strncmp(mentry->mnt_dir, loopDir, loopDirLen)) {
1905 int fd = open(mentry->mnt_fsname, O_RDONLY | O_CLOEXEC);
1907 struct loop_info64 li;
1908 if (ioctl(fd, LOOP_GET_STATUS64, &li) >= 0) {
1909 cli->sendMsg(ResponseCode::AsecListResult,
1910 (const char*) li.lo_file_name, false);
1920 extern "C" int vold_unmountAll(void) {
1921 VolumeManager *vm = VolumeManager::Instance();
1922 return vm->unmountAll();
1925 bool VolumeManager::isMountpointMounted(const char *mp)
1927 FILE *fp = setmntent("/proc/mounts", "r");
1929 SLOGE("Error opening /proc/mounts (%s)", strerror(errno));
1933 bool found_mp = false;
1935 while ((mentry = getmntent(fp)) != NULL) {
1936 if (strcmp(mentry->mnt_dir, mp) == 0) {
1945 int VolumeManager::mkdirs(char* path) {
1946 // Only offer to create directories for paths managed by vold
1947 if (strncmp(path, "/storage/", 9) == 0) {
1948 // fs_mkdirs() does symlink checking and relative path enforcement
1949 return fs_mkdirs(path, 0700);
1951 SLOGE("Failed to find mounted volume for %s", path);