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VolumeManager.cpp
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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/mount.h>
#include <linux/kdev_t.h>
#define LOG_TAG "Vold"
#include <openssl/md5.h>
#include <cutils/log.h>
#include <cutils/properties.h>
#include <sysutils/NetlinkEvent.h>
#include "VolumeManager.h"
#include "DirectVolume.h"
#include "ResponseCode.h"
#include "Loop.h"
#include "Fat.h"
#include "Devmapper.h"
#include "Process.h"
#include "Asec.h"
#include "cryptfs.h"
VolumeManager *VolumeManager::sInstance = NULL;
VolumeManager *VolumeManager::Instance() {
if (!sInstance)
sInstance = new VolumeManager();
return sInstance;
}
VolumeManager::VolumeManager() {
mDebug = false;
mVolumes = new VolumeCollection();
mActiveContainers = new AsecIdCollection();
mBroadcaster = NULL;
mUmsSharingCount = 0;
mSavedDirtyRatio = -1;
mVolManagerDisabled = 0;
// set dirty ratio to ro.vold.umsdirtyratio (default 0) when UMS is active
char dirtyratio[PROPERTY_VALUE_MAX];
property_get("ro.vold.umsdirtyratio", dirtyratio, "0");
mUmsDirtyRatio = atoi(dirtyratio);
}
VolumeManager::~VolumeManager() {
delete mVolumes;
delete mActiveContainers;
}
char *VolumeManager::asecHash(const char *id, char *buffer, size_t len) {
static const char* digits = "0123456789abcdef";
unsigned char sig[MD5_DIGEST_LENGTH];
if (buffer == NULL) {
SLOGE("Destination buffer is NULL");
errno = ESPIPE;
return NULL;
} else if (id == NULL) {
SLOGE("Source buffer is NULL");
errno = ESPIPE;
return NULL;
} else if (len < MD5_ASCII_LENGTH_PLUS_NULL) {
SLOGE("Target hash buffer size < %d bytes (%d)",
MD5_ASCII_LENGTH_PLUS_NULL, len);
errno = ESPIPE;
return NULL;
}
MD5(reinterpret_cast<const unsigned char*>(id), strlen(id), sig);
char *p = buffer;
for (int i = 0; i < MD5_DIGEST_LENGTH; i++) {
*p++ = digits[sig[i] >> 4];
*p++ = digits[sig[i] & 0x0F];
}
*p = '\0';
return buffer;
}
void VolumeManager::setDebug(bool enable) {
mDebug = enable;
VolumeCollection::iterator it;
for (it = mVolumes->begin(); it != mVolumes->end(); ++it) {
(*it)->setDebug(enable);
}
}
int VolumeManager::start() {
return 0;
}
int VolumeManager::stop() {
return 0;
}
int VolumeManager::addVolume(Volume *v) {
mVolumes->push_back(v);
return 0;
}
void VolumeManager::handleBlockEvent(NetlinkEvent *evt) {
const char *devpath = evt->findParam("DEVPATH");
/* Lookup a volume to handle this device */
VolumeCollection::iterator it;
bool hit = false;
for (it = mVolumes->begin(); it != mVolumes->end(); ++it) {
if (!(*it)->handleBlockEvent(evt)) {
#ifdef NETLINK_DEBUG
SLOGD("Device '%s' event handled by volume %s\n", devpath, (*it)->getLabel());
#endif
hit = true;
break;
}
}
if (!hit) {
#ifdef NETLINK_DEBUG
SLOGW("No volumes handled block event for '%s'", devpath);
#endif
}
}
int VolumeManager::listVolumes(SocketClient *cli) {
VolumeCollection::iterator i;
for (i = mVolumes->begin(); i != mVolumes->end(); ++i) {
char *buffer;
asprintf(&buffer, "%s %s %d",
(*i)->getLabel(), (*i)->getMountpoint(),
(*i)->getState());
cli->sendMsg(ResponseCode::VolumeListResult, buffer, false);
free(buffer);
}
cli->sendMsg(ResponseCode::CommandOkay, "Volumes listed.", false);
return 0;
}
int VolumeManager::formatVolume(const char *label) {
Volume *v = lookupVolume(label);
if (!v) {
errno = ENOENT;
return -1;
}
if (mVolManagerDisabled) {
errno = EBUSY;
return -1;
}
return v->formatVol();
}
int VolumeManager::getObbMountPath(const char *sourceFile, char *mountPath, int mountPathLen) {
char idHash[33];
if (!asecHash(sourceFile, idHash, sizeof(idHash))) {
SLOGE("Hash of '%s' failed (%s)", sourceFile, strerror(errno));
return -1;
}
memset(mountPath, 0, mountPathLen);
snprintf(mountPath, mountPathLen, "%s/%s", Volume::LOOPDIR, idHash);
if (access(mountPath, F_OK)) {
errno = ENOENT;
return -1;
}
return 0;
}
int VolumeManager::getAsecMountPath(const char *id, char *buffer, int maxlen) {
char asecFileName[255];
snprintf(asecFileName, sizeof(asecFileName), "%s/%s.asec", Volume::SEC_ASECDIR, id);
memset(buffer, 0, maxlen);
if (access(asecFileName, F_OK)) {
errno = ENOENT;
return -1;
}
snprintf(buffer, maxlen, "%s/%s", Volume::ASECDIR, id);
return 0;
}
int VolumeManager::getAsecFilesystemPath(const char *id, char *buffer, int maxlen) {
char asecFileName[255];
snprintf(asecFileName, sizeof(asecFileName), "%s/%s.asec", Volume::SEC_ASECDIR, id);
memset(buffer, 0, maxlen);
if (access(asecFileName, F_OK)) {
errno = ENOENT;
return -1;
}
snprintf(buffer, maxlen, "%s", asecFileName);
return 0;
}
int VolumeManager::createAsec(const char *id, unsigned int numSectors,
const char *fstype, const char *key, int ownerUid) {
struct asec_superblock sb;
memset(&sb, 0, sizeof(sb));
sb.magic = ASEC_SB_MAGIC;
sb.ver = ASEC_SB_VER;
if (numSectors < ((1024*1024)/512)) {
SLOGE("Invalid container size specified (%d sectors)", numSectors);
errno = EINVAL;
return -1;
}
if (lookupVolume(id)) {
SLOGE("ASEC id '%s' currently exists", id);
errno = EADDRINUSE;
return -1;
}
char asecFileName[255];
snprintf(asecFileName, sizeof(asecFileName), "%s/%s.asec", Volume::SEC_ASECDIR, id);
if (!access(asecFileName, F_OK)) {
SLOGE("ASEC file '%s' currently exists - destroy it first! (%s)",
asecFileName, strerror(errno));
errno = EADDRINUSE;
return -1;
}
/*
* Add some headroom
*/
unsigned fatSize = (((numSectors * 4) / 512) + 1) * 2;
unsigned numImgSectors = numSectors + fatSize + 2;
if (numImgSectors % 63) {
numImgSectors += (63 - (numImgSectors % 63));
}
// Add +1 for our superblock which is at the end
if (Loop::createImageFile(asecFileName, numImgSectors + 1)) {
SLOGE("ASEC image file creation failed (%s)", strerror(errno));
return -1;
}
char idHash[33];
if (!asecHash(id, idHash, sizeof(idHash))) {
SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
unlink(asecFileName);
return -1;
}
char loopDevice[255];
if (Loop::create(idHash, asecFileName, loopDevice, sizeof(loopDevice))) {
SLOGE("ASEC loop device creation failed (%s)", strerror(errno));
unlink(asecFileName);
return -1;
}
char dmDevice[255];
bool cleanupDm = false;
if (strcmp(key, "none")) {
// XXX: This is all we support for now
sb.c_cipher = ASEC_SB_C_CIPHER_TWOFISH;
if (Devmapper::create(idHash, loopDevice, key, numImgSectors, dmDevice,
sizeof(dmDevice))) {
SLOGE("ASEC device mapping failed (%s)", strerror(errno));
Loop::destroyByDevice(loopDevice);
unlink(asecFileName);
return -1;
}
cleanupDm = true;
} else {
sb.c_cipher = ASEC_SB_C_CIPHER_NONE;
strcpy(dmDevice, loopDevice);
}
/*
* Drop down the superblock at the end of the file
*/
int sbfd = open(loopDevice, O_RDWR);
if (sbfd < 0) {
SLOGE("Failed to open new DM device for superblock write (%s)", strerror(errno));
if (cleanupDm) {
Devmapper::destroy(idHash);
}
Loop::destroyByDevice(loopDevice);
unlink(asecFileName);
return -1;
}
if (lseek(sbfd, (numImgSectors * 512), SEEK_SET) < 0) {
close(sbfd);
SLOGE("Failed to lseek for superblock (%s)", strerror(errno));
if (cleanupDm) {
Devmapper::destroy(idHash);
}
Loop::destroyByDevice(loopDevice);
unlink(asecFileName);
return -1;
}
if (write(sbfd, &sb, sizeof(sb)) != sizeof(sb)) {
close(sbfd);
SLOGE("Failed to write superblock (%s)", strerror(errno));
if (cleanupDm) {
Devmapper::destroy(idHash);
}
Loop::destroyByDevice(loopDevice);
unlink(asecFileName);
return -1;
}
close(sbfd);
if (strcmp(fstype, "none")) {
if (strcmp(fstype, "fat")) {
SLOGW("Unknown fstype '%s' specified for container", fstype);
}
if (Fat::format(dmDevice, numImgSectors)) {
SLOGE("ASEC FAT format failed (%s)", strerror(errno));
if (cleanupDm) {
Devmapper::destroy(idHash);
}
Loop::destroyByDevice(loopDevice);
unlink(asecFileName);
return -1;
}
char mountPoint[255];
snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id);
if (mkdir(mountPoint, 0777)) {
if (errno != EEXIST) {
SLOGE("Mountpoint creation failed (%s)", strerror(errno));
if (cleanupDm) {
Devmapper::destroy(idHash);
}
Loop::destroyByDevice(loopDevice);
unlink(asecFileName);
return -1;
}
}
if (Fat::doMount(dmDevice, mountPoint, false, false, false, ownerUid,
0, 0000, false)) {
SLOGE("ASEC FAT mount failed (%s)", strerror(errno));
if (cleanupDm) {
Devmapper::destroy(idHash);
}
Loop::destroyByDevice(loopDevice);
unlink(asecFileName);
return -1;
}
} else {
SLOGI("Created raw secure container %s (no filesystem)", id);
}
mActiveContainers->push_back(new ContainerData(strdup(id), ASEC));
return 0;
}
int VolumeManager::finalizeAsec(const char *id) {
char asecFileName[255];
char loopDevice[255];
char mountPoint[255];
snprintf(asecFileName, sizeof(asecFileName), "%s/%s.asec", Volume::SEC_ASECDIR, id);
char idHash[33];
if (!asecHash(id, idHash, sizeof(idHash))) {
SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
return -1;
}
if (Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
SLOGE("Unable to finalize %s (%s)", id, strerror(errno));
return -1;
}
snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id);
// XXX:
if (Fat::doMount(loopDevice, mountPoint, true, true, true, 0, 0, 0227, false)) {
SLOGE("ASEC finalize mount failed (%s)", strerror(errno));
return -1;
}
if (mDebug) {
SLOGD("ASEC %s finalized", id);
}
return 0;
}
int VolumeManager::renameAsec(const char *id1, const char *id2) {
char *asecFilename1;
char *asecFilename2;
char mountPoint[255];
asprintf(&asecFilename1, "%s/%s.asec", Volume::SEC_ASECDIR, id1);
asprintf(&asecFilename2, "%s/%s.asec", Volume::SEC_ASECDIR, id2);
snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id1);
if (isMountpointMounted(mountPoint)) {
SLOGW("Rename attempt when src mounted");
errno = EBUSY;
goto out_err;
}
snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id2);
if (isMountpointMounted(mountPoint)) {
SLOGW("Rename attempt when dst mounted");
errno = EBUSY;
goto out_err;
}
if (!access(asecFilename2, F_OK)) {
SLOGE("Rename attempt when dst exists");
errno = EADDRINUSE;
goto out_err;
}
if (rename(asecFilename1, asecFilename2)) {
SLOGE("Rename of '%s' to '%s' failed (%s)", asecFilename1, asecFilename2, strerror(errno));
goto out_err;
}
free(asecFilename1);
free(asecFilename2);
return 0;
out_err:
free(asecFilename1);
free(asecFilename2);
return -1;
}
#define UNMOUNT_RETRIES 5
#define UNMOUNT_SLEEP_BETWEEN_RETRY_MS (1000 * 1000)
int VolumeManager::unmountAsec(const char *id, bool force) {
char asecFileName[255];
char mountPoint[255];
snprintf(asecFileName, sizeof(asecFileName), "%s/%s.asec", Volume::SEC_ASECDIR, id);
snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id);
char idHash[33];
if (!asecHash(id, idHash, sizeof(idHash))) {
SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
return -1;
}
return unmountLoopImage(id, idHash, asecFileName, mountPoint, force);
}
int VolumeManager::unmountObb(const char *fileName, bool force) {
char mountPoint[255];
char idHash[33];
if (!asecHash(fileName, idHash, sizeof(idHash))) {
SLOGE("Hash of '%s' failed (%s)", fileName, strerror(errno));
return -1;
}
snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::LOOPDIR, idHash);
return unmountLoopImage(fileName, idHash, fileName, mountPoint, force);
}
int VolumeManager::unmountLoopImage(const char *id, const char *idHash,
const char *fileName, const char *mountPoint, bool force) {
if (!isMountpointMounted(mountPoint)) {
SLOGE("Unmount request for %s when not mounted", id);
errno = ENOENT;
return -1;
}
int i, rc;
for (i = 1; i <= UNMOUNT_RETRIES; i++) {
rc = umount(mountPoint);
if (!rc) {
break;
}
if (rc && (errno == EINVAL || errno == ENOENT)) {
SLOGI("Container %s unmounted OK", id);
rc = 0;
break;
}
SLOGW("%s unmount attempt %d failed (%s)",
id, i, strerror(errno));
int action = 0; // default is to just complain
if (force) {
if (i > (UNMOUNT_RETRIES - 2))
action = 2; // SIGKILL
else if (i > (UNMOUNT_RETRIES - 3))
action = 1; // SIGHUP
}
Process::killProcessesWithOpenFiles(mountPoint, action);
usleep(UNMOUNT_SLEEP_BETWEEN_RETRY_MS);
}
if (rc) {
errno = EBUSY;
SLOGE("Failed to unmount container %s (%s)", id, strerror(errno));
return -1;
}
int retries = 10;
while(retries--) {
if (!rmdir(mountPoint)) {
break;
}
SLOGW("Failed to rmdir %s (%s)", mountPoint, strerror(errno));
usleep(UNMOUNT_SLEEP_BETWEEN_RETRY_MS);
}
if (!retries) {
SLOGE("Timed out trying to rmdir %s (%s)", mountPoint, strerror(errno));
}
if (Devmapper::destroy(idHash) && errno != ENXIO) {
SLOGE("Failed to destroy devmapper instance (%s)", strerror(errno));
}
char loopDevice[255];
if (!Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
Loop::destroyByDevice(loopDevice);
} else {
SLOGW("Failed to find loop device for {%s} (%s)", fileName, strerror(errno));
}
AsecIdCollection::iterator it;
for (it = mActiveContainers->begin(); it != mActiveContainers->end(); ++it) {
ContainerData* cd = *it;
if (!strcmp(cd->id, id)) {
free(*it);
mActiveContainers->erase(it);
break;
}
}
if (it == mActiveContainers->end()) {
SLOGW("mActiveContainers is inconsistent!");
}
return 0;
}
int VolumeManager::destroyAsec(const char *id, bool force) {
char asecFileName[255];
char mountPoint[255];
snprintf(asecFileName, sizeof(asecFileName), "%s/%s.asec", Volume::SEC_ASECDIR, id);
snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id);
if (isMountpointMounted(mountPoint)) {
if (mDebug) {
SLOGD("Unmounting container before destroy");
}
if (unmountAsec(id, force)) {
SLOGE("Failed to unmount asec %s for destroy (%s)", id, strerror(errno));
return -1;
}
}
if (unlink(asecFileName)) {
SLOGE("Failed to unlink asec '%s' (%s)", asecFileName, strerror(errno));
return -1;
}
if (mDebug) {
SLOGD("ASEC %s destroyed", id);
}
return 0;
}
int VolumeManager::mountAsec(const char *id, const char *key, int ownerUid) {
char asecFileName[255];
char mountPoint[255];
snprintf(asecFileName, sizeof(asecFileName), "%s/%s.asec", Volume::SEC_ASECDIR, id);
snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id);
if (isMountpointMounted(mountPoint)) {
SLOGE("ASEC %s already mounted", id);
errno = EBUSY;
return -1;
}
char idHash[33];
if (!asecHash(id, idHash, sizeof(idHash))) {
SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
return -1;
}
char loopDevice[255];
if (Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
if (Loop::create(idHash, asecFileName, loopDevice, sizeof(loopDevice))) {
SLOGE("ASEC loop device creation failed (%s)", strerror(errno));
return -1;
}
if (mDebug) {
SLOGD("New loop device created at %s", loopDevice);
}
} else {
if (mDebug) {
SLOGD("Found active loopback for %s at %s", asecFileName, loopDevice);
}
}
char dmDevice[255];
bool cleanupDm = false;
int fd;
unsigned int nr_sec = 0;
if ((fd = open(loopDevice, O_RDWR)) < 0) {
SLOGE("Failed to open loopdevice (%s)", strerror(errno));
Loop::destroyByDevice(loopDevice);
return -1;
}
if (ioctl(fd, BLKGETSIZE, &nr_sec)) {
SLOGE("Failed to get loop size (%s)", strerror(errno));
Loop::destroyByDevice(loopDevice);
close(fd);
return -1;
}
/*
* Validate superblock
*/
struct asec_superblock sb;
memset(&sb, 0, sizeof(sb));
if (lseek(fd, ((nr_sec-1) * 512), SEEK_SET) < 0) {
SLOGE("lseek failed (%s)", strerror(errno));
close(fd);
Loop::destroyByDevice(loopDevice);
return -1;
}
if (read(fd, &sb, sizeof(sb)) != sizeof(sb)) {
SLOGE("superblock read failed (%s)", strerror(errno));
close(fd);
Loop::destroyByDevice(loopDevice);
return -1;
}
close(fd);
if (mDebug) {
SLOGD("Container sb magic/ver (%.8x/%.2x)", sb.magic, sb.ver);
}
if (sb.magic != ASEC_SB_MAGIC || sb.ver != ASEC_SB_VER) {
SLOGE("Bad container magic/version (%.8x/%.2x)", sb.magic, sb.ver);
Loop::destroyByDevice(loopDevice);
errno = EMEDIUMTYPE;
return -1;
}
nr_sec--; // We don't want the devmapping to extend onto our superblock
if (strcmp(key, "none")) {
if (Devmapper::lookupActive(idHash, dmDevice, sizeof(dmDevice))) {
if (Devmapper::create(idHash, loopDevice, key, nr_sec,
dmDevice, sizeof(dmDevice))) {
SLOGE("ASEC device mapping failed (%s)", strerror(errno));
Loop::destroyByDevice(loopDevice);
return -1;
}
if (mDebug) {
SLOGD("New devmapper instance created at %s", dmDevice);
}
} else {
if (mDebug) {
SLOGD("Found active devmapper for %s at %s", asecFileName, dmDevice);
}
}
cleanupDm = true;
} else {
strcpy(dmDevice, loopDevice);
}
if (mkdir(mountPoint, 0777)) {
if (errno != EEXIST) {
SLOGE("Mountpoint creation failed (%s)", strerror(errno));
if (cleanupDm) {
Devmapper::destroy(idHash);
}
Loop::destroyByDevice(loopDevice);
return -1;
}
}
if (Fat::doMount(dmDevice, mountPoint, true, false, true, ownerUid, 0,
0222, false)) {
// 0227, false)) {
SLOGE("ASEC mount failed (%s)", strerror(errno));
if (cleanupDm) {
Devmapper::destroy(idHash);
}
Loop::destroyByDevice(loopDevice);
return -1;
}
mActiveContainers->push_back(new ContainerData(strdup(id), ASEC));
if (mDebug) {
SLOGD("ASEC %s mounted", id);
}
return 0;
}
/**
* Mounts an image file <code>img</code>.
*/
int VolumeManager::mountObb(const char *img, const char *key, int ownerUid) {
char mountPoint[255];
char idHash[33];
if (!asecHash(img, idHash, sizeof(idHash))) {
SLOGE("Hash of '%s' failed (%s)", img, strerror(errno));
return -1;
}
snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::LOOPDIR, idHash);
if (isMountpointMounted(mountPoint)) {
SLOGE("Image %s already mounted", img);
errno = EBUSY;
return -1;
}
char loopDevice[255];
if (Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
if (Loop::create(idHash, img, loopDevice, sizeof(loopDevice))) {
SLOGE("Image loop device creation failed (%s)", strerror(errno));
return -1;
}
if (mDebug) {
SLOGD("New loop device created at %s", loopDevice);
}
} else {
if (mDebug) {
SLOGD("Found active loopback for %s at %s", img, loopDevice);
}
}
char dmDevice[255];
bool cleanupDm = false;
int fd;
unsigned int nr_sec = 0;
if ((fd = open(loopDevice, O_RDWR)) < 0) {
SLOGE("Failed to open loopdevice (%s)", strerror(errno));
Loop::destroyByDevice(loopDevice);
return -1;
}
if (ioctl(fd, BLKGETSIZE, &nr_sec)) {
SLOGE("Failed to get loop size (%s)", strerror(errno));
Loop::destroyByDevice(loopDevice);
close(fd);
return -1;
}
close(fd);
if (strcmp(key, "none")) {
if (Devmapper::lookupActive(idHash, dmDevice, sizeof(dmDevice))) {
if (Devmapper::create(idHash, loopDevice, key, nr_sec,
dmDevice, sizeof(dmDevice))) {
SLOGE("ASEC device mapping failed (%s)", strerror(errno));
Loop::destroyByDevice(loopDevice);
return -1;
}
if (mDebug) {
SLOGD("New devmapper instance created at %s", dmDevice);
}
} else {
if (mDebug) {
SLOGD("Found active devmapper for %s at %s", img, dmDevice);
}
}
cleanupDm = true;
} else {
strcpy(dmDevice, loopDevice);
}
if (mkdir(mountPoint, 0755)) {
if (errno != EEXIST) {
SLOGE("Mountpoint creation failed (%s)", strerror(errno));
if (cleanupDm) {
Devmapper::destroy(idHash);
}
Loop::destroyByDevice(loopDevice);
return -1;
}
}
if (Fat::doMount(dmDevice, mountPoint, true, false, true, ownerUid, 0,
0227, false)) {
SLOGE("Image mount failed (%s)", strerror(errno));
if (cleanupDm) {
Devmapper::destroy(idHash);
}
Loop::destroyByDevice(loopDevice);
return -1;
}
mActiveContainers->push_back(new ContainerData(strdup(img), OBB));
if (mDebug) {
SLOGD("Image %s mounted", img);
}
return 0;
}
int VolumeManager::mountVolume(const char *label) {
Volume *v = lookupVolume(label);
if (!v) {
errno = ENOENT;
return -1;
}
return v->mountVol();
}
int VolumeManager::listMountedObbs(SocketClient* cli) {
char device[256];
char mount_path[256];
char rest[256];
FILE *fp;
char line[1024];
if (!(fp = fopen("/proc/mounts", "r"))) {
SLOGE("Error opening /proc/mounts (%s)", strerror(errno));
return -1;
}
// Create a string to compare against that has a trailing slash
int loopDirLen = sizeof(Volume::LOOPDIR);
char loopDir[loopDirLen + 2];
strcpy(loopDir, Volume::LOOPDIR);
loopDir[loopDirLen++] = '/';
loopDir[loopDirLen] = '\0';
while(fgets(line, sizeof(line), fp)) {
line[strlen(line)-1] = '\0';
/*
* Should look like:
* /dev/block/loop0 /mnt/obb/fc99df1323fd36424f864dcb76b76d65 ...
*/
sscanf(line, "%255s %255s %255s\n", device, mount_path, rest);
if (!strncmp(mount_path, loopDir, loopDirLen)) {
int fd = open(device, O_RDONLY);
if (fd >= 0) {
struct loop_info64 li;
if (ioctl(fd, LOOP_GET_STATUS64, &li) >= 0) {
cli->sendMsg(ResponseCode::AsecListResult,
(const char*) li.lo_file_name, false);
}
close(fd);
}
}
}
fclose(fp);
return 0;
}
int VolumeManager::shareEnabled(const char *label, const char *method, bool *enabled) {
Volume *v = lookupVolume(label);
if (!v) {
errno = ENOENT;
return -1;
}
if (strcmp(method, "ums")) {
errno = ENOSYS;
return -1;
}
if (v->getState() != Volume::State_Shared) {
*enabled = false;
} else {
*enabled = true;
}
return 0;
}
static const char *LUN_FILES[] = {
#ifdef CUSTOM_LUN_FILE
CUSTOM_LUN_FILE,
#endif
/* Only andriod0 exists, but the %d in there is a hack to satisfy the
format string and also give a not found error when %d > 0 */
"/sys/class/android_usb/android%d/f_mass_storage/lun/file",
NULL
};
int VolumeManager::openLun(int number) {
const char **iterator = LUN_FILES;
char qualified_lun[255];
while (*iterator) {
bzero(qualified_lun, 255);
snprintf(qualified_lun, 254, *iterator, number);
int fd = open(qualified_lun, O_WRONLY);
if (fd >= 0) {
SLOGD("Opened lunfile %s", qualified_lun);
return fd;
}
SLOGE("Unable to open ums lunfile %s (%s)", qualified_lun, strerror(errno));
iterator++;
}
errno = EINVAL;
SLOGE("Unable to find ums lunfile for LUN %d", number);
return -1;
}
int VolumeManager::shareVolume(const char *label, const char *method) {
Volume *v = lookupVolume(label);
if (!v) {
errno = ENOENT;
return -1;
}
/*
* Eventually, we'll want to support additional share back-ends,
* some of which may work while the media is mounted. For now,
* we just support UMS
*/
if (strcmp(method, "ums")) {
errno = ENOSYS;
return -1;
}
if (v->getState() == Volume::State_NoMedia) {
errno = ENODEV;
return -1;
}
if (v->getState() != Volume::State_Idle) {
// You need to unmount manually before sharing
errno = EBUSY;
return -1;
}
if (mVolManagerDisabled) {
errno = EBUSY;
return -1;
}
dev_t d = v->getShareDevice();
if ((MAJOR(d) == 0) && (MINOR(d) == 0)) {
// This volume does not support raw disk access
errno = EINVAL;
return -1;
}
#ifdef VOLD_EMMC_SHARES_DEV_MAJOR
// If emmc and sdcard share dev major number, vold may pick
// incorrectly based on partition nodes alone. Use device nodes instead.
v->getDeviceNodes((dev_t *) &d, 1);
if ((MAJOR(d) == 0) && (MINOR(d) == 0)) {
// This volume does not support raw disk access
errno = EINVAL;
return -1;