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 <base/logging.h>
39 #include <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* kUserMountPath = "/mnt/user";
93 static const unsigned int kMajorBlockMmc = 179;
95 /* writes superblock at end of file or device given by name */
96 static int writeSuperBlock(const char* name, struct asec_superblock *sb, unsigned int numImgSectors) {
97 int sbfd = open(name, O_RDWR | O_CLOEXEC);
99 SLOGE("Failed to open %s for superblock write (%s)", name, strerror(errno));
103 if (lseek(sbfd, (numImgSectors * 512), SEEK_SET) < 0) {
104 SLOGE("Failed to lseek for superblock (%s)", strerror(errno));
109 if (write(sbfd, sb, sizeof(struct asec_superblock)) != sizeof(struct asec_superblock)) {
110 SLOGE("Failed to write superblock (%s)", strerror(errno));
118 static int adjustSectorNumExt4(unsigned numSectors) {
119 // Ext4 started to reserve 2% or 4096 clusters, whichever is smaller for
120 // preventing costly operations or unexpected ENOSPC error.
121 // Ext4::format() uses default block size without clustering.
122 unsigned clusterSectors = 4096 / 512;
123 unsigned reservedSectors = (numSectors * 2)/100 + (numSectors % 50 > 0);
124 numSectors += reservedSectors > (4096 * clusterSectors) ? (4096 * clusterSectors) : reservedSectors;
125 return ROUND_UP_POWER_OF_2(numSectors, 3);
128 static int adjustSectorNumFAT(unsigned numSectors) {
132 unsigned fatSize = (((numSectors * 4) / 512) + 1) * 2;
133 numSectors += fatSize + 2;
135 * FAT is aligned to 32 kb with 512b sectors.
137 return ROUND_UP_POWER_OF_2(numSectors, 6);
140 static int setupLoopDevice(char* buffer, size_t len, const char* asecFileName, const char* idHash, bool debug) {
141 if (Loop::lookupActive(idHash, buffer, len)) {
142 if (Loop::create(idHash, asecFileName, buffer, len)) {
143 SLOGE("ASEC loop device creation failed for %s (%s)", asecFileName, strerror(errno));
147 SLOGD("New loop device created at %s", buffer);
151 SLOGD("Found active loopback for %s at %s", asecFileName, buffer);
157 static int setupDevMapperDevice(char* buffer, size_t len, const char* loopDevice, const char* asecFileName, const char* key, const char* idHash , int numImgSectors, bool* createdDMDevice, bool debug) {
158 if (strcmp(key, "none")) {
159 if (Devmapper::lookupActive(idHash, buffer, len)) {
160 if (Devmapper::create(idHash, loopDevice, key, numImgSectors,
162 SLOGE("ASEC device mapping failed for %s (%s)", asecFileName, strerror(errno));
166 SLOGD("New devmapper instance created at %s", buffer);
170 SLOGD("Found active devmapper for %s at %s", asecFileName, buffer);
173 *createdDMDevice = true;
175 strcpy(buffer, loopDevice);
176 *createdDMDevice = false;
181 static void waitForDevMapper(const char *dmDevice) {
183 * Wait for the device mapper node to be created. Sometimes it takes a
184 * while. Wait for up to 1 second. We could also inspect incoming uevents,
185 * but that would take more effort.
189 if (!access(dmDevice, F_OK) || errno != ENOENT) {
196 VolumeManager *VolumeManager::sInstance = NULL;
198 VolumeManager *VolumeManager::Instance() {
200 sInstance = new VolumeManager();
204 VolumeManager::VolumeManager() {
206 mActiveContainers = new AsecIdCollection();
208 mUmsSharingCount = 0;
209 mSavedDirtyRatio = -1;
210 // set dirty ratio to 0 when UMS is active
214 VolumeManager::~VolumeManager() {
215 delete mActiveContainers;
218 char *VolumeManager::asecHash(const char *id, char *buffer, size_t len) {
219 static const char* digits = "0123456789abcdef";
221 unsigned char sig[MD5_DIGEST_LENGTH];
223 if (buffer == NULL) {
224 SLOGE("Destination buffer is NULL");
227 } else if (id == NULL) {
228 SLOGE("Source buffer is NULL");
231 } else if (len < MD5_ASCII_LENGTH_PLUS_NULL) {
232 SLOGE("Target hash buffer size < %d bytes (%zu)",
233 MD5_ASCII_LENGTH_PLUS_NULL, len);
238 MD5(reinterpret_cast<const unsigned char*>(id), strlen(id), sig);
241 for (int i = 0; i < MD5_DIGEST_LENGTH; i++) {
242 *p++ = digits[sig[i] >> 4];
243 *p++ = digits[sig[i] & 0x0F];
250 int VolumeManager::setDebug(bool enable) {
255 int VolumeManager::start() {
256 // Always start from a clean slate by unmounting everything in
257 // directories that we own, in case we crashed.
260 // Assume that we always have an emulated volume on internal
261 // storage; the framework will decide if it should be mounted.
262 CHECK(mInternalEmulated == nullptr);
263 mInternalEmulated = std::shared_ptr<android::vold::VolumeBase>(
264 new android::vold::EmulatedVolume("/data/media"));
265 mInternalEmulated->create();
270 int VolumeManager::stop() {
271 CHECK(mInternalEmulated != nullptr);
272 mInternalEmulated->destroy();
273 mInternalEmulated = nullptr;
277 void VolumeManager::handleBlockEvent(NetlinkEvent *evt) {
278 std::lock_guard<std::mutex> lock(mLock);
281 LOG(VERBOSE) << "----------------";
282 LOG(VERBOSE) << "handleBlockEvent with action " << (int) evt->getAction();
286 std::string eventPath(evt->findParam("DEVPATH"));
287 std::string devType(evt->findParam("DEVTYPE"));
289 if (devType != "disk") return;
291 int major = atoi(evt->findParam("MAJOR"));
292 int minor = atoi(evt->findParam("MINOR"));
293 dev_t device = makedev(major, minor);
295 switch (evt->getAction()) {
296 case NetlinkEvent::Action::kAdd: {
297 for (auto source : mDiskSources) {
298 if (source->matches(eventPath)) {
299 // For now, assume that MMC devices are SD, and that
300 // everything else is USB
301 int flags = source->getFlags();
302 if (major == kMajorBlockMmc) {
303 flags |= android::vold::Disk::Flags::kSd;
305 flags |= android::vold::Disk::Flags::kUsb;
308 auto disk = new android::vold::Disk(eventPath, device,
309 source->getNickname(), flags);
311 mDisks.push_back(std::shared_ptr<android::vold::Disk>(disk));
317 case NetlinkEvent::Action::kChange: {
318 LOG(DEBUG) << "Disk at " << major << ":" << minor << " changed";
319 for (auto disk : mDisks) {
320 if (disk->getDevice() == device) {
321 disk->readMetadata();
322 disk->readPartitions();
327 case NetlinkEvent::Action::kRemove: {
328 auto i = mDisks.begin();
329 while (i != mDisks.end()) {
330 if ((*i)->getDevice() == device) {
340 LOG(WARNING) << "Unexpected block event action " << (int) evt->getAction();
346 void VolumeManager::addDiskSource(const std::shared_ptr<DiskSource>& diskSource) {
347 mDiskSources.push_back(diskSource);
350 std::shared_ptr<android::vold::Disk> VolumeManager::findDisk(const std::string& id) {
351 for (auto disk : mDisks) {
352 if (disk->getId() == id) {
359 std::shared_ptr<android::vold::VolumeBase> VolumeManager::findVolume(const std::string& id) {
360 if (mInternalEmulated->getId() == id) {
361 return mInternalEmulated;
363 for (auto disk : mDisks) {
364 auto vol = disk->findVolume(id);
365 if (vol != nullptr) {
372 void VolumeManager::listVolumes(android::vold::VolumeBase::Type type,
373 std::list<std::string>& list) {
375 for (auto disk : mDisks) {
376 disk->listVolumes(type, list);
380 nsecs_t VolumeManager::benchmarkPrivate(const std::string& id) {
382 if (id == "private" || id == "null") {
385 auto vol = findVolume(id);
386 if (vol != nullptr && vol->getState() == android::vold::VolumeBase::State::kMounted) {
387 path = vol->getPath();
392 LOG(WARNING) << "Failed to find volume for " << id;
396 return android::vold::BenchmarkPrivate(path);
399 int VolumeManager::forgetPartition(const std::string& partGuid) {
400 std::string normalizedGuid;
401 if (android::vold::NormalizeHex(partGuid, normalizedGuid)) {
402 LOG(WARNING) << "Invalid GUID " << partGuid;
406 std::string keyPath = android::vold::BuildKeyPath(normalizedGuid);
407 if (unlink(keyPath.c_str()) != 0) {
408 LOG(ERROR) << "Failed to unlink " << keyPath;
415 int VolumeManager::linkPrimary(userid_t userId) {
416 std::string source(mPrimary->getPath());
417 if (mPrimary->getType() == android::vold::VolumeBase::Type::kEmulated) {
418 source = StringPrintf("%s/%d", source.c_str(), userId);
419 fs_prepare_dir(source.c_str(), 0755, AID_ROOT, AID_ROOT);
422 std::string target(StringPrintf("/mnt/user/%d/primary", userId));
423 if (TEMP_FAILURE_RETRY(unlink(target.c_str()))) {
424 if (errno != ENOENT) {
425 SLOGW("Failed to unlink %s: %s", target.c_str(), strerror(errno));
428 LOG(DEBUG) << "Linking " << source << " to " << target;
429 if (TEMP_FAILURE_RETRY(symlink(source.c_str(), target.c_str()))) {
430 SLOGW("Failed to link %s to %s: %s", source.c_str(), target.c_str(),
437 int VolumeManager::onUserAdded(userid_t userId, int userSerialNumber) {
438 mAddedUsers[userId] = userSerialNumber;
442 int VolumeManager::onUserRemoved(userid_t userId) {
443 mAddedUsers.erase(userId);
447 int VolumeManager::onUserStarted(userid_t userId) {
448 // Note that sometimes the system will spin up processes from Zygote
449 // before actually starting the user, so we're okay if Zygote
450 // already created this directory.
451 std::string path(StringPrintf("%s/%d", kUserMountPath, userId));
452 fs_prepare_dir(path.c_str(), 0755, AID_ROOT, AID_ROOT);
454 mStartedUsers.insert(userId);
461 int VolumeManager::onUserStopped(userid_t userId) {
462 mStartedUsers.erase(userId);
466 int VolumeManager::setPrimary(const std::shared_ptr<android::vold::VolumeBase>& vol) {
468 for (userid_t userId : mStartedUsers) {
474 static int sane_readlinkat(int dirfd, const char* path, char* buf, size_t bufsiz) {
475 ssize_t len = readlinkat(dirfd, path, buf, bufsiz);
478 } else if (len == (ssize_t) bufsiz) {
486 static int unmount_tree(const char* path) {
487 size_t path_len = strlen(path);
489 FILE* fp = setmntent("/proc/mounts", "r");
491 ALOGE("Error opening /proc/mounts: %s", strerror(errno));
495 // Some volumes can be stacked on each other, so force unmount in
496 // reverse order to give us the best chance of success.
497 std::list<std::string> toUnmount;
499 while ((mentry = getmntent(fp)) != NULL) {
500 if (strncmp(mentry->mnt_dir, path, path_len) == 0) {
501 toUnmount.push_front(std::string(mentry->mnt_dir));
506 for (auto path : toUnmount) {
507 if (umount2(path.c_str(), MNT_DETACH)) {
508 ALOGW("Failed to unmount %s: %s", path.c_str(), strerror(errno));
514 int VolumeManager::remountUid(uid_t uid, const std::string& mode) {
515 LOG(DEBUG) << "Remounting " << uid << " as mode " << mode;
519 char rootName[PATH_MAX];
520 char pidName[PATH_MAX];
526 if (!(dir = opendir("/proc"))) {
527 PLOG(ERROR) << "Failed to opendir";
531 // Figure out root namespace to compare against below
532 if (sane_readlinkat(dirfd(dir), "1/ns/mnt", rootName, PATH_MAX) == -1) {
533 PLOG(ERROR) << "Failed to readlink";
538 // Poke through all running PIDs look for apps running as UID
539 while ((de = readdir(dir))) {
543 pidFd = openat(dirfd(dir), de->d_name, O_RDONLY | O_DIRECTORY | O_CLOEXEC);
547 if (fstat(pidFd, &sb) != 0) {
548 PLOG(WARNING) << "Failed to stat " << de->d_name;
551 if (sb.st_uid != uid) {
555 // Matches so far, but refuse to touch if in root namespace
556 LOG(DEBUG) << "Found matching PID " << de->d_name;
557 if (sane_readlinkat(pidFd, "ns/mnt", pidName, PATH_MAX) == -1) {
558 PLOG(WARNING) << "Failed to read namespace for " << de->d_name;
561 if (!strcmp(rootName, pidName)) {
562 LOG(WARNING) << "Skipping due to root namespace";
566 // We purposefully leave the namespace open across the fork
567 nsFd = openat(pidFd, "ns/mnt", O_RDONLY);
569 PLOG(WARNING) << "Failed to open namespace for " << de->d_name;
573 if (!(child = fork())) {
574 if (setns(nsFd, CLONE_NEWNS) != 0) {
575 PLOG(ERROR) << "Failed to setns for " << de->d_name;
579 unmount_tree("/storage");
581 std::string storageSource;
582 if (mode == "default") {
583 storageSource = "/mnt/runtime/default";
584 } else if (mode == "read") {
585 storageSource = "/mnt/runtime/read";
586 } else if (mode == "write") {
587 storageSource = "/mnt/runtime/write";
589 // Sane default of no storage visible
592 if (TEMP_FAILURE_RETRY(mount(storageSource.c_str(), "/storage",
593 NULL, MS_BIND | MS_REC | MS_SLAVE, NULL)) == -1) {
594 PLOG(ERROR) << "Failed to mount " << storageSource << " for "
599 // Mount user-specific symlink helper into place
600 userid_t user_id = multiuser_get_user_id(uid);
601 std::string userSource(StringPrintf("/mnt/user/%d", user_id));
602 if (TEMP_FAILURE_RETRY(mount(userSource.c_str(), "/storage/self",
603 NULL, MS_BIND, NULL)) == -1) {
604 PLOG(ERROR) << "Failed to mount " << userSource << " for "
613 PLOG(ERROR) << "Failed to fork";
616 TEMP_FAILURE_RETRY(waitpid(child, nullptr, 0));
627 int VolumeManager::reset() {
628 // Tear down all existing disks/volumes and start from a blank slate so
629 // newly connected framework hears all events.
630 mInternalEmulated->destroy();
631 mInternalEmulated->create();
632 for (auto disk : mDisks) {
637 mStartedUsers.clear();
641 int VolumeManager::shutdown() {
642 mInternalEmulated->destroy();
643 for (auto disk : mDisks) {
650 int VolumeManager::unmountAll() {
651 std::lock_guard<std::mutex> lock(mLock);
653 // First, try gracefully unmounting all known devices
654 if (mInternalEmulated != nullptr) {
655 mInternalEmulated->unmount();
657 for (auto disk : mDisks) {
661 // Worst case we might have some stale mounts lurking around, so
662 // force unmount those just to be safe.
663 FILE* fp = setmntent("/proc/mounts", "r");
665 SLOGE("Error opening /proc/mounts: %s", strerror(errno));
669 // Some volumes can be stacked on each other, so force unmount in
670 // reverse order to give us the best chance of success.
671 std::list<std::string> toUnmount;
673 while ((mentry = getmntent(fp)) != NULL) {
674 if (strncmp(mentry->mnt_dir, "/mnt/", 5) == 0
675 || strncmp(mentry->mnt_dir, "/storage/", 9) == 0) {
676 toUnmount.push_front(std::string(mentry->mnt_dir));
681 for (auto path : toUnmount) {
682 SLOGW("Tearing down stale mount %s", path.c_str());
683 android::vold::ForceUnmount(path);
689 int VolumeManager::getObbMountPath(const char *sourceFile, char *mountPath, int mountPathLen) {
691 if (!asecHash(sourceFile, idHash, sizeof(idHash))) {
692 SLOGE("Hash of '%s' failed (%s)", sourceFile, strerror(errno));
696 memset(mountPath, 0, mountPathLen);
697 int written = snprintf(mountPath, mountPathLen, "%s/%s", VolumeManager::LOOPDIR, idHash);
698 if ((written < 0) || (written >= mountPathLen)) {
703 if (access(mountPath, F_OK)) {
711 int VolumeManager::getAsecMountPath(const char *id, char *buffer, int maxlen) {
712 char asecFileName[255];
714 if (!isLegalAsecId(id)) {
715 SLOGE("getAsecMountPath: Invalid asec id \"%s\"", id);
720 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
721 SLOGE("Couldn't find ASEC %s", id);
725 memset(buffer, 0, maxlen);
726 if (access(asecFileName, F_OK)) {
731 int written = snprintf(buffer, maxlen, "%s/%s", VolumeManager::ASECDIR, id);
732 if ((written < 0) || (written >= maxlen)) {
733 SLOGE("getAsecMountPath failed for %s: couldn't construct path in buffer", id);
741 int VolumeManager::getAsecFilesystemPath(const char *id, char *buffer, int maxlen) {
742 char asecFileName[255];
744 if (!isLegalAsecId(id)) {
745 SLOGE("getAsecFilesystemPath: Invalid asec id \"%s\"", id);
750 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
751 SLOGE("Couldn't find ASEC %s", id);
755 memset(buffer, 0, maxlen);
756 if (access(asecFileName, F_OK)) {
761 int written = snprintf(buffer, maxlen, "%s", asecFileName);
762 if ((written < 0) || (written >= maxlen)) {
770 int VolumeManager::createAsec(const char *id, unsigned int numSectors, const char *fstype,
771 const char *key, const int ownerUid, bool isExternal) {
772 struct asec_superblock sb;
773 memset(&sb, 0, sizeof(sb));
775 if (!isLegalAsecId(id)) {
776 SLOGE("createAsec: Invalid asec id \"%s\"", id);
781 const bool wantFilesystem = strcmp(fstype, "none");
782 bool usingExt4 = false;
783 if (wantFilesystem) {
784 usingExt4 = !strcmp(fstype, "ext4");
786 sb.c_opts |= ASEC_SB_C_OPTS_EXT4;
787 } else if (strcmp(fstype, "fat")) {
788 SLOGE("Invalid filesystem type %s", fstype);
794 sb.magic = ASEC_SB_MAGIC;
795 sb.ver = ASEC_SB_VER;
797 if (numSectors < ((1024*1024)/512)) {
798 SLOGE("Invalid container size specified (%d sectors)", numSectors);
803 char asecFileName[255];
805 if (!findAsec(id, asecFileName, sizeof(asecFileName))) {
806 SLOGE("ASEC file '%s' currently exists - destroy it first! (%s)",
807 asecFileName, strerror(errno));
812 const char *asecDir = isExternal ? VolumeManager::SEC_ASECDIR_EXT : VolumeManager::SEC_ASECDIR_INT;
814 int written = snprintf(asecFileName, sizeof(asecFileName), "%s/%s.asec", asecDir, id);
815 if ((written < 0) || (size_t(written) >= sizeof(asecFileName))) {
820 if (!access(asecFileName, F_OK)) {
821 SLOGE("ASEC file '%s' currently exists - destroy it first! (%s)",
822 asecFileName, strerror(errno));
827 unsigned numImgSectors;
829 numImgSectors = adjustSectorNumExt4(numSectors);
831 numImgSectors = adjustSectorNumFAT(numSectors);
833 // Add +1 for our superblock which is at the end
834 if (Loop::createImageFile(asecFileName, numImgSectors + 1)) {
835 SLOGE("ASEC image file creation failed (%s)", strerror(errno));
840 if (!asecHash(id, idHash, sizeof(idHash))) {
841 SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
842 unlink(asecFileName);
846 char loopDevice[255];
847 if (Loop::create(idHash, asecFileName, loopDevice, sizeof(loopDevice))) {
848 SLOGE("ASEC loop device creation failed (%s)", strerror(errno));
849 unlink(asecFileName);
854 bool cleanupDm = false;
856 if (strcmp(key, "none")) {
857 // XXX: This is all we support for now
858 sb.c_cipher = ASEC_SB_C_CIPHER_TWOFISH;
859 if (Devmapper::create(idHash, loopDevice, key, numImgSectors, dmDevice,
861 SLOGE("ASEC device mapping failed (%s)", strerror(errno));
862 Loop::destroyByDevice(loopDevice);
863 unlink(asecFileName);
868 sb.c_cipher = ASEC_SB_C_CIPHER_NONE;
869 strcpy(dmDevice, loopDevice);
873 * Drop down the superblock at the end of the file
875 if (writeSuperBlock(loopDevice, &sb, numImgSectors)) {
877 Devmapper::destroy(idHash);
879 Loop::destroyByDevice(loopDevice);
880 unlink(asecFileName);
884 if (wantFilesystem) {
886 char mountPoint[255];
888 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
889 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
890 SLOGE("ASEC fs format failed: couldn't construct mountPoint");
892 Devmapper::destroy(idHash);
894 Loop::destroyByDevice(loopDevice);
895 unlink(asecFileName);
900 formatStatus = android::vold::ext4::Format(dmDevice, numImgSectors, mountPoint);
902 formatStatus = android::vold::vfat::Format(dmDevice, numImgSectors);
905 if (formatStatus < 0) {
906 SLOGE("ASEC fs format failed (%s)", strerror(errno));
908 Devmapper::destroy(idHash);
910 Loop::destroyByDevice(loopDevice);
911 unlink(asecFileName);
915 if (mkdir(mountPoint, 0000)) {
916 if (errno != EEXIST) {
917 SLOGE("Mountpoint creation failed (%s)", strerror(errno));
919 Devmapper::destroy(idHash);
921 Loop::destroyByDevice(loopDevice);
922 unlink(asecFileName);
929 mountStatus = android::vold::ext4::Mount(dmDevice, mountPoint,
930 false, false, false);
932 mountStatus = android::vold::vfat::Mount(dmDevice, mountPoint,
933 false, false, false, ownerUid, 0, 0000, false);
937 SLOGE("ASEC FAT mount failed (%s)", strerror(errno));
939 Devmapper::destroy(idHash);
941 Loop::destroyByDevice(loopDevice);
942 unlink(asecFileName);
947 int dirfd = open(mountPoint, O_DIRECTORY | O_CLOEXEC);
949 if (fchown(dirfd, ownerUid, AID_SYSTEM)
950 || fchmod(dirfd, S_IRUSR | S_IWUSR | S_IXUSR | S_ISGID | S_IRGRP | S_IXGRP)) {
951 SLOGI("Cannot chown/chmod new ASEC mount point %s", mountPoint);
957 SLOGI("Created raw secure container %s (no filesystem)", id);
960 mActiveContainers->push_back(new ContainerData(strdup(id), ASEC));
964 int VolumeManager::resizeAsec(const char *id, unsigned numSectors, const char *key) {
965 char asecFileName[255];
966 char mountPoint[255];
967 bool cleanupDm = false;
969 if (!isLegalAsecId(id)) {
970 SLOGE("resizeAsec: Invalid asec id \"%s\"", id);
975 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
976 SLOGE("Couldn't find ASEC %s", id);
980 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
981 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
982 SLOGE("ASEC resize failed for %s: couldn't construct mountpoint", id);
986 if (isMountpointMounted(mountPoint)) {
987 SLOGE("ASEC %s mounted. Unmount before resizing", id);
992 struct asec_superblock sb;
994 unsigned int oldNumSec = 0;
996 if ((fd = open(asecFileName, O_RDONLY | O_CLOEXEC)) < 0) {
997 SLOGE("Failed to open ASEC file (%s)", strerror(errno));
1002 if (fstat(fd, &info) < 0) {
1003 SLOGE("Failed to get file size (%s)", strerror(errno));
1008 oldNumSec = info.st_size / 512;
1010 unsigned numImgSectors;
1011 if (sb.c_opts & ASEC_SB_C_OPTS_EXT4)
1012 numImgSectors = adjustSectorNumExt4(numSectors);
1014 numImgSectors = adjustSectorNumFAT(numSectors);
1016 * add one block for the superblock
1018 SLOGD("Resizing from %d sectors to %d sectors", oldNumSec, numImgSectors + 1);
1019 if (oldNumSec == numImgSectors + 1) {
1020 SLOGW("Size unchanged; ignoring resize request");
1022 } else if (oldNumSec > numImgSectors + 1) {
1023 SLOGE("Only growing is currently supported.");
1029 * Try to read superblock.
1031 memset(&sb, 0, sizeof(struct asec_superblock));
1032 if (lseek(fd, ((oldNumSec - 1) * 512), SEEK_SET) < 0) {
1033 SLOGE("lseek failed (%s)", strerror(errno));
1037 if (read(fd, &sb, sizeof(struct asec_superblock)) != sizeof(struct asec_superblock)) {
1038 SLOGE("superblock read failed (%s)", strerror(errno));
1045 SLOGD("Container sb magic/ver (%.8x/%.2x)", sb.magic, sb.ver);
1047 if (sb.magic != ASEC_SB_MAGIC || sb.ver != ASEC_SB_VER) {
1048 SLOGE("Bad container magic/version (%.8x/%.2x)", sb.magic, sb.ver);
1049 errno = EMEDIUMTYPE;
1053 if (!(sb.c_opts & ASEC_SB_C_OPTS_EXT4)) {
1054 SLOGE("Only ext4 partitions are supported for resize");
1059 if (Loop::resizeImageFile(asecFileName, numImgSectors + 1)) {
1060 SLOGE("Resize of ASEC image file failed. Could not resize %s", id);
1065 * Drop down a copy of the superblock at the end of the file
1067 if (writeSuperBlock(asecFileName, &sb, numImgSectors))
1071 if (!asecHash(id, idHash, sizeof(idHash))) {
1072 SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
1076 char loopDevice[255];
1077 if (setupLoopDevice(loopDevice, sizeof(loopDevice), asecFileName, idHash, mDebug))
1082 if (setupDevMapperDevice(dmDevice, sizeof(dmDevice), loopDevice, asecFileName, key, idHash, numImgSectors, &cleanupDm, mDebug)) {
1083 Loop::destroyByDevice(loopDevice);
1088 * Wait for the device mapper node to be created.
1090 waitForDevMapper(dmDevice);
1092 if (android::vold::ext4::Resize(dmDevice, numImgSectors)) {
1093 SLOGE("Unable to resize %s (%s)", id, strerror(errno));
1095 Devmapper::destroy(idHash);
1097 Loop::destroyByDevice(loopDevice);
1103 Loop::resizeImageFile(asecFileName, oldNumSec);
1107 int VolumeManager::finalizeAsec(const char *id) {
1108 char asecFileName[255];
1109 char loopDevice[255];
1110 char mountPoint[255];
1112 if (!isLegalAsecId(id)) {
1113 SLOGE("finalizeAsec: Invalid asec id \"%s\"", id);
1118 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
1119 SLOGE("Couldn't find ASEC %s", id);
1124 if (!asecHash(id, idHash, sizeof(idHash))) {
1125 SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
1129 if (Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
1130 SLOGE("Unable to finalize %s (%s)", id, strerror(errno));
1134 unsigned long nr_sec = 0;
1135 struct asec_superblock sb;
1137 if (Loop::lookupInfo(loopDevice, &sb, &nr_sec)) {
1141 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
1142 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1143 SLOGE("ASEC finalize failed: couldn't construct mountPoint");
1148 if (sb.c_opts & ASEC_SB_C_OPTS_EXT4) {
1149 result = android::vold::ext4::Mount(loopDevice, mountPoint,
1152 result = android::vold::vfat::Mount(loopDevice, mountPoint,
1153 true, true, true, 0, 0, 0227, false);
1157 SLOGE("ASEC finalize mount failed (%s)", strerror(errno));
1162 SLOGD("ASEC %s finalized", id);
1167 int VolumeManager::fixupAsecPermissions(const char *id, gid_t gid, const char* filename) {
1168 char asecFileName[255];
1169 char loopDevice[255];
1170 char mountPoint[255];
1172 if (gid < AID_APP) {
1173 SLOGE("Group ID is not in application range");
1177 if (!isLegalAsecId(id)) {
1178 SLOGE("fixupAsecPermissions: Invalid asec id \"%s\"", id);
1183 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
1184 SLOGE("Couldn't find ASEC %s", id);
1189 if (!asecHash(id, idHash, sizeof(idHash))) {
1190 SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
1194 if (Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
1195 SLOGE("Unable fix permissions during lookup on %s (%s)", id, strerror(errno));
1199 unsigned long nr_sec = 0;
1200 struct asec_superblock sb;
1202 if (Loop::lookupInfo(loopDevice, &sb, &nr_sec)) {
1206 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
1207 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1208 SLOGE("Unable remount to fix permissions for %s: couldn't construct mountpoint", id);
1213 if ((sb.c_opts & ASEC_SB_C_OPTS_EXT4) == 0) {
1217 int ret = android::vold::ext4::Mount(loopDevice, mountPoint,
1218 false /* read-only */,
1220 false /* executable */);
1222 SLOGE("Unable remount to fix permissions for %s (%s)", id, strerror(errno));
1226 char *paths[] = { mountPoint, NULL };
1228 FTS *fts = fts_open(paths, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL);
1230 // Traverse the entire hierarchy and chown to system UID.
1231 for (FTSENT *ftsent = fts_read(fts); ftsent != NULL; ftsent = fts_read(fts)) {
1232 // We don't care about the lost+found directory.
1233 if (!strcmp(ftsent->fts_name, "lost+found")) {
1238 * There can only be one file marked as private right now.
1239 * This should be more robust, but it satisfies the requirements
1240 * we have for right now.
1242 const bool privateFile = !strcmp(ftsent->fts_name, filename);
1244 int fd = open(ftsent->fts_accpath, O_NOFOLLOW | O_CLOEXEC);
1246 SLOGE("Couldn't open file %s: %s", ftsent->fts_accpath, strerror(errno));
1251 result |= fchown(fd, AID_SYSTEM, privateFile? gid : AID_SYSTEM);
1253 if (ftsent->fts_info & FTS_D) {
1254 result |= fchmod(fd, 0755);
1255 } else if (ftsent->fts_info & FTS_F) {
1256 result |= fchmod(fd, privateFile ? 0640 : 0644);
1259 if (selinux_android_restorecon(ftsent->fts_path, 0) < 0) {
1260 SLOGE("restorecon failed for %s: %s\n", ftsent->fts_path, strerror(errno));
1268 // Finally make the directory readable by everyone.
1269 int dirfd = open(mountPoint, O_DIRECTORY | O_CLOEXEC);
1270 if (dirfd < 0 || fchmod(dirfd, 0755)) {
1271 SLOGE("Couldn't change owner of existing directory %s: %s", mountPoint, strerror(errno));
1279 result |= android::vold::ext4::Mount(loopDevice, mountPoint,
1280 true /* read-only */,
1282 true /* execute */);
1285 SLOGE("ASEC fix permissions failed (%s)", strerror(errno));
1290 SLOGD("ASEC %s permissions fixed", id);
1295 int VolumeManager::renameAsec(const char *id1, const char *id2) {
1296 char asecFilename1[255];
1297 char *asecFilename2;
1298 char mountPoint[255];
1302 if (!isLegalAsecId(id1)) {
1303 SLOGE("renameAsec: Invalid asec id1 \"%s\"", id1);
1308 if (!isLegalAsecId(id2)) {
1309 SLOGE("renameAsec: Invalid asec id2 \"%s\"", id2);
1314 if (findAsec(id1, asecFilename1, sizeof(asecFilename1), &dir)) {
1315 SLOGE("Couldn't find ASEC %s", id1);
1319 asprintf(&asecFilename2, "%s/%s.asec", dir, id2);
1321 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id1);
1322 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1323 SLOGE("Rename failed: couldn't construct mountpoint");
1327 if (isMountpointMounted(mountPoint)) {
1328 SLOGW("Rename attempt when src mounted");
1333 written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id2);
1334 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1335 SLOGE("Rename failed: couldn't construct mountpoint2");
1339 if (isMountpointMounted(mountPoint)) {
1340 SLOGW("Rename attempt when dst mounted");
1345 if (!access(asecFilename2, F_OK)) {
1346 SLOGE("Rename attempt when dst exists");
1351 if (rename(asecFilename1, asecFilename2)) {
1352 SLOGE("Rename of '%s' to '%s' failed (%s)", asecFilename1, asecFilename2, strerror(errno));
1356 free(asecFilename2);
1360 free(asecFilename2);
1364 #define UNMOUNT_RETRIES 5
1365 #define UNMOUNT_SLEEP_BETWEEN_RETRY_MS (1000 * 1000)
1366 int VolumeManager::unmountAsec(const char *id, bool force) {
1367 char asecFileName[255];
1368 char mountPoint[255];
1370 if (!isLegalAsecId(id)) {
1371 SLOGE("unmountAsec: Invalid asec id \"%s\"", id);
1376 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
1377 SLOGE("Couldn't find ASEC %s", id);
1381 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
1382 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1383 SLOGE("ASEC unmount failed for %s: couldn't construct mountpoint", id);
1388 if (!asecHash(id, idHash, sizeof(idHash))) {
1389 SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
1393 return unmountLoopImage(id, idHash, asecFileName, mountPoint, force);
1396 int VolumeManager::unmountObb(const char *fileName, bool force) {
1397 char mountPoint[255];
1400 if (!asecHash(fileName, idHash, sizeof(idHash))) {
1401 SLOGE("Hash of '%s' failed (%s)", fileName, strerror(errno));
1405 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::LOOPDIR, idHash);
1406 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1407 SLOGE("OBB unmount failed for %s: couldn't construct mountpoint", fileName);
1411 return unmountLoopImage(fileName, idHash, fileName, mountPoint, force);
1414 int VolumeManager::unmountLoopImage(const char *id, const char *idHash,
1415 const char *fileName, const char *mountPoint, bool force) {
1416 if (!isMountpointMounted(mountPoint)) {
1417 SLOGE("Unmount request for %s when not mounted", id);
1423 for (i = 1; i <= UNMOUNT_RETRIES; i++) {
1424 rc = umount(mountPoint);
1428 if (rc && (errno == EINVAL || errno == ENOENT)) {
1429 SLOGI("Container %s unmounted OK", id);
1433 SLOGW("%s unmount attempt %d failed (%s)",
1434 id, i, strerror(errno));
1436 int signal = 0; // default is to just complain
1439 if (i > (UNMOUNT_RETRIES - 2))
1441 else if (i > (UNMOUNT_RETRIES - 3))
1445 Process::killProcessesWithOpenFiles(mountPoint, signal);
1446 usleep(UNMOUNT_SLEEP_BETWEEN_RETRY_MS);
1451 SLOGE("Failed to unmount container %s (%s)", id, strerror(errno));
1458 if (!rmdir(mountPoint)) {
1462 SLOGW("Failed to rmdir %s (%s)", mountPoint, strerror(errno));
1463 usleep(UNMOUNT_SLEEP_BETWEEN_RETRY_MS);
1467 SLOGE("Timed out trying to rmdir %s (%s)", mountPoint, strerror(errno));
1470 for (i=1; i <= UNMOUNT_RETRIES; i++) {
1471 if (Devmapper::destroy(idHash) && errno != ENXIO) {
1472 SLOGE("Failed to destroy devmapper instance (%s)", strerror(errno));
1473 usleep(UNMOUNT_SLEEP_BETWEEN_RETRY_MS);
1480 char loopDevice[255];
1481 if (!Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
1482 Loop::destroyByDevice(loopDevice);
1484 SLOGW("Failed to find loop device for {%s} (%s)", fileName, strerror(errno));
1487 AsecIdCollection::iterator it;
1488 for (it = mActiveContainers->begin(); it != mActiveContainers->end(); ++it) {
1489 ContainerData* cd = *it;
1490 if (!strcmp(cd->id, id)) {
1492 mActiveContainers->erase(it);
1496 if (it == mActiveContainers->end()) {
1497 SLOGW("mActiveContainers is inconsistent!");
1502 int VolumeManager::destroyAsec(const char *id, bool force) {
1503 char asecFileName[255];
1504 char mountPoint[255];
1506 if (!isLegalAsecId(id)) {
1507 SLOGE("destroyAsec: Invalid asec id \"%s\"", id);
1512 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
1513 SLOGE("Couldn't find ASEC %s", id);
1517 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
1518 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1519 SLOGE("ASEC destroy failed for %s: couldn't construct mountpoint", id);
1523 if (isMountpointMounted(mountPoint)) {
1525 SLOGD("Unmounting container before destroy");
1527 if (unmountAsec(id, force)) {
1528 SLOGE("Failed to unmount asec %s for destroy (%s)", id, strerror(errno));
1533 if (unlink(asecFileName)) {
1534 SLOGE("Failed to unlink asec '%s' (%s)", asecFileName, strerror(errno));
1539 SLOGD("ASEC %s destroyed", id);
1545 * Legal ASEC ids consist of alphanumeric characters, '-',
1546 * '_', or '.'. ".." is not allowed. The first or last character
1547 * of the ASEC id cannot be '.' (dot).
1549 bool VolumeManager::isLegalAsecId(const char *id) const {
1551 size_t len = strlen(id);
1556 if ((id[0] == '.') || (id[len - 1] == '.')) {
1560 for (i = 0; i < len; i++) {
1562 // i=0 is guaranteed never to have a dot. See above.
1563 if (id[i-1] == '.') return false;
1566 if (id[i] == '_' || id[i] == '-') continue;
1567 if (id[i] >= 'a' && id[i] <= 'z') continue;
1568 if (id[i] >= 'A' && id[i] <= 'Z') continue;
1569 if (id[i] >= '0' && id[i] <= '9') continue;
1576 bool VolumeManager::isAsecInDirectory(const char *dir, const char *asecName) const {
1577 int dirfd = open(dir, O_DIRECTORY | O_CLOEXEC);
1579 SLOGE("Couldn't open internal ASEC dir (%s)", strerror(errno));
1584 bool ret = (fstatat(dirfd, asecName, &sb, AT_SYMLINK_NOFOLLOW) == 0)
1585 && S_ISREG(sb.st_mode);
1592 int VolumeManager::findAsec(const char *id, char *asecPath, size_t asecPathLen,
1593 const char **directory) const {
1596 if (!isLegalAsecId(id)) {
1597 SLOGE("findAsec: Invalid asec id \"%s\"", id);
1602 if (asprintf(&asecName, "%s.asec", id) < 0) {
1603 SLOGE("Couldn't allocate string to write ASEC name");
1608 if (isAsecInDirectory(VolumeManager::SEC_ASECDIR_INT, asecName)) {
1609 dir = VolumeManager::SEC_ASECDIR_INT;
1610 } else if (isAsecInDirectory(VolumeManager::SEC_ASECDIR_EXT, asecName)) {
1611 dir = VolumeManager::SEC_ASECDIR_EXT;
1617 if (directory != NULL) {
1621 if (asecPath != NULL) {
1622 int written = snprintf(asecPath, asecPathLen, "%s/%s", dir, asecName);
1623 if ((written < 0) || (size_t(written) >= asecPathLen)) {
1624 SLOGE("findAsec failed for %s: couldn't construct ASEC path", id);
1634 int VolumeManager::mountAsec(const char *id, const char *key, int ownerUid, bool readOnly) {
1635 char asecFileName[255];
1636 char mountPoint[255];
1638 if (!isLegalAsecId(id)) {
1639 SLOGE("mountAsec: Invalid asec id \"%s\"", id);
1644 if (findAsec(id, asecFileName, sizeof(asecFileName))) {
1645 SLOGE("Couldn't find ASEC %s", id);
1649 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::ASECDIR, id);
1650 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1651 SLOGE("ASEC mount failed for %s: couldn't construct mountpoint", id);
1655 if (isMountpointMounted(mountPoint)) {
1656 SLOGE("ASEC %s already mounted", id);
1662 if (!asecHash(id, idHash, sizeof(idHash))) {
1663 SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
1667 char loopDevice[255];
1668 if (setupLoopDevice(loopDevice, sizeof(loopDevice), asecFileName, idHash, mDebug))
1672 bool cleanupDm = false;
1674 unsigned long nr_sec = 0;
1675 struct asec_superblock sb;
1677 if (Loop::lookupInfo(loopDevice, &sb, &nr_sec)) {
1682 SLOGD("Container sb magic/ver (%.8x/%.2x)", sb.magic, sb.ver);
1684 if (sb.magic != ASEC_SB_MAGIC || sb.ver != ASEC_SB_VER) {
1685 SLOGE("Bad container magic/version (%.8x/%.2x)", sb.magic, sb.ver);
1686 Loop::destroyByDevice(loopDevice);
1687 errno = EMEDIUMTYPE;
1690 nr_sec--; // We don't want the devmapping to extend onto our superblock
1692 if (setupDevMapperDevice(dmDevice, sizeof(dmDevice), loopDevice, asecFileName, key, idHash , nr_sec, &cleanupDm, mDebug)) {
1693 Loop::destroyByDevice(loopDevice);
1697 if (mkdir(mountPoint, 0000)) {
1698 if (errno != EEXIST) {
1699 SLOGE("Mountpoint creation failed (%s)", strerror(errno));
1701 Devmapper::destroy(idHash);
1703 Loop::destroyByDevice(loopDevice);
1709 * Wait for the device mapper node to be created.
1711 waitForDevMapper(dmDevice);
1714 if (sb.c_opts & ASEC_SB_C_OPTS_EXT4) {
1715 result = android::vold::ext4::Mount(dmDevice, mountPoint,
1716 readOnly, false, readOnly);
1718 result = android::vold::vfat::Mount(dmDevice, mountPoint,
1719 readOnly, false, readOnly, ownerUid, 0, 0222, false);
1723 SLOGE("ASEC mount failed (%s)", strerror(errno));
1725 Devmapper::destroy(idHash);
1727 Loop::destroyByDevice(loopDevice);
1731 mActiveContainers->push_back(new ContainerData(strdup(id), ASEC));
1733 SLOGD("ASEC %s mounted", id);
1739 * Mounts an image file <code>img</code>.
1741 int VolumeManager::mountObb(const char *img, const char *key, int ownerGid) {
1742 char mountPoint[255];
1745 if (!asecHash(img, idHash, sizeof(idHash))) {
1746 SLOGE("Hash of '%s' failed (%s)", img, strerror(errno));
1750 int written = snprintf(mountPoint, sizeof(mountPoint), "%s/%s", VolumeManager::LOOPDIR, idHash);
1751 if ((written < 0) || (size_t(written) >= sizeof(mountPoint))) {
1752 SLOGE("OBB mount failed for %s: couldn't construct mountpoint", img);
1756 if (isMountpointMounted(mountPoint)) {
1757 SLOGE("Image %s already mounted", img);
1762 char loopDevice[255];
1763 if (setupLoopDevice(loopDevice, sizeof(loopDevice), img, idHash, mDebug))
1767 bool cleanupDm = false;
1769 unsigned long nr_sec = 0;
1771 if ((fd = open(loopDevice, O_RDWR | O_CLOEXEC)) < 0) {
1772 SLOGE("Failed to open loopdevice (%s)", strerror(errno));
1773 Loop::destroyByDevice(loopDevice);
1777 get_blkdev_size(fd, &nr_sec);
1779 SLOGE("Failed to get loop size (%s)", strerror(errno));
1780 Loop::destroyByDevice(loopDevice);
1787 if (setupDevMapperDevice(dmDevice, sizeof(loopDevice), loopDevice, img,key, idHash, nr_sec, &cleanupDm, mDebug)) {
1788 Loop::destroyByDevice(loopDevice);
1792 if (mkdir(mountPoint, 0755)) {
1793 if (errno != EEXIST) {
1794 SLOGE("Mountpoint creation failed (%s)", strerror(errno));
1796 Devmapper::destroy(idHash);
1798 Loop::destroyByDevice(loopDevice);
1804 * Wait for the device mapper node to be created.
1806 waitForDevMapper(dmDevice);
1808 if (android::vold::vfat::Mount(dmDevice, mountPoint,
1809 true, false, true, 0, ownerGid, 0227, false)) {
1810 SLOGE("Image mount failed (%s)", strerror(errno));
1812 Devmapper::destroy(idHash);
1814 Loop::destroyByDevice(loopDevice);
1818 mActiveContainers->push_back(new ContainerData(strdup(img), OBB));
1820 SLOGD("Image %s mounted", img);
1825 int VolumeManager::listMountedObbs(SocketClient* cli) {
1826 FILE *fp = setmntent("/proc/mounts", "r");
1828 SLOGE("Error opening /proc/mounts (%s)", strerror(errno));
1832 // Create a string to compare against that has a trailing slash
1833 int loopDirLen = strlen(VolumeManager::LOOPDIR);
1834 char loopDir[loopDirLen + 2];
1835 strcpy(loopDir, VolumeManager::LOOPDIR);
1836 loopDir[loopDirLen++] = '/';
1837 loopDir[loopDirLen] = '\0';
1840 while ((mentry = getmntent(fp)) != NULL) {
1841 if (!strncmp(mentry->mnt_dir, loopDir, loopDirLen)) {
1842 int fd = open(mentry->mnt_fsname, O_RDONLY | O_CLOEXEC);
1844 struct loop_info64 li;
1845 if (ioctl(fd, LOOP_GET_STATUS64, &li) >= 0) {
1846 cli->sendMsg(ResponseCode::AsecListResult,
1847 (const char*) li.lo_file_name, false);
1857 extern "C" int vold_unmountAll(void) {
1858 VolumeManager *vm = VolumeManager::Instance();
1859 return vm->unmountAll();
1862 bool VolumeManager::isMountpointMounted(const char *mp)
1864 FILE *fp = setmntent("/proc/mounts", "r");
1866 SLOGE("Error opening /proc/mounts (%s)", strerror(errno));
1870 bool found_mp = false;
1872 while ((mentry = getmntent(fp)) != NULL) {
1873 if (strcmp(mentry->mnt_dir, mp) == 0) {
1882 int VolumeManager::mkdirs(char* path) {
1883 // Only offer to create directories for paths managed by vold
1884 if (strncmp(path, "/storage/", 9) == 0) {
1885 // fs_mkdirs() does symlink checking and relative path enforcement
1886 return fs_mkdirs(path, 0700);
1888 SLOGE("Failed to find mounted volume for %s", path);