VolumeManager.cpp revision 425524dba1552ab3d2ad39e205e65d0a2af997f2 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
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
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
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.
15 */
16
17#include <stdio.h>
18#include <stdlib.h>
19#include <string.h>
20#include <errno.h>
21#include <fcntl.h>
22#include <fts.h>
23#include <unistd.h>
24#include <sys/stat.h>
25#include <sys/types.h>
26#include <sys/mount.h>
27#include <dirent.h>
28
29#include <linux/kdev_t.h>
30
31#define LOG_TAG "Vold"
32
33#include <openssl/md5.h>
34
35#include <cutils/log.h>
36
37#include <sysutils/NetlinkEvent.h>
38
39#include <private/android_filesystem_config.h>
40
41#include "VolumeManager.h"
42#include "DirectVolume.h"
43#include "ResponseCode.h"
44#include "Loop.h"
45#include "Ext4.h"
46#include "Fat.h"
47#include "Devmapper.h"
48#include "Process.h"
49#include "Asec.h"
50#include "cryptfs.h"
51
52#define MASS_STORAGE_FILE_PATH  "/sys/class/android_usb/android0/f_mass_storage/lun/file"
53
54VolumeManager *VolumeManager::sInstance = NULL;
55
56VolumeManager *VolumeManager::Instance() {
57    if (!sInstance)
58        sInstance = new VolumeManager();
59    return sInstance;
60}
61
62VolumeManager::VolumeManager() {
63    mDebug = false;
64    mVolumes = new VolumeCollection();
65    mActiveContainers = new AsecIdCollection();
66    mBroadcaster = NULL;
67    mUmsSharingCount = 0;
68    mSavedDirtyRatio = -1;
69    // set dirty ratio to 0 when UMS is active
70    mUmsDirtyRatio = 0;
71    mVolManagerDisabled = 0;
72}
73
74VolumeManager::~VolumeManager() {
75    delete mVolumes;
76    delete mActiveContainers;
77}
78
79char *VolumeManager::asecHash(const char *id, char *buffer, size_t len) {
80    static const char* digits = "0123456789abcdef";
81
82    unsigned char sig[MD5_DIGEST_LENGTH];
83
84    if (buffer == NULL) {
85        SLOGE("Destination buffer is NULL");
86        errno = ESPIPE;
87        return NULL;
88    } else if (id == NULL) {
89        SLOGE("Source buffer is NULL");
90        errno = ESPIPE;
91        return NULL;
92    } else if (len < MD5_ASCII_LENGTH_PLUS_NULL) {
93        SLOGE("Target hash buffer size < %d bytes (%d)",
94                MD5_ASCII_LENGTH_PLUS_NULL, len);
95        errno = ESPIPE;
96        return NULL;
97    }
98
99    MD5(reinterpret_cast<const unsigned char*>(id), strlen(id), sig);
100
101    char *p = buffer;
102    for (int i = 0; i < MD5_DIGEST_LENGTH; i++) {
103        *p++ = digits[sig[i] >> 4];
104        *p++ = digits[sig[i] & 0x0F];
105    }
106    *p = '\0';
107
108    return buffer;
109}
110
111void VolumeManager::setDebug(bool enable) {
112    mDebug = enable;
113    VolumeCollection::iterator it;
114    for (it = mVolumes->begin(); it != mVolumes->end(); ++it) {
115        (*it)->setDebug(enable);
116    }
117}
118
119int VolumeManager::start() {
120    return 0;
121}
122
123int VolumeManager::stop() {
124    return 0;
125}
126
127int VolumeManager::addVolume(Volume *v) {
128    mVolumes->push_back(v);
129    return 0;
130}
131
132void VolumeManager::handleBlockEvent(NetlinkEvent *evt) {
133    const char *devpath = evt->findParam("DEVPATH");
134
135    /* Lookup a volume to handle this device */
136    VolumeCollection::iterator it;
137    bool hit = false;
138    for (it = mVolumes->begin(); it != mVolumes->end(); ++it) {
139        if (!(*it)->handleBlockEvent(evt)) {
140#ifdef NETLINK_DEBUG
141            SLOGD("Device '%s' event handled by volume %s\n", devpath, (*it)->getLabel());
142#endif
143            hit = true;
144            break;
145        }
146    }
147
148    if (!hit) {
149#ifdef NETLINK_DEBUG
150        SLOGW("No volumes handled block event for '%s'", devpath);
151#endif
152    }
153}
154
155int VolumeManager::listVolumes(SocketClient *cli) {
156    VolumeCollection::iterator i;
157
158    for (i = mVolumes->begin(); i != mVolumes->end(); ++i) {
159        char *buffer;
160        asprintf(&buffer, "%s %s %d",
161                 (*i)->getLabel(), (*i)->getMountpoint(),
162                 (*i)->getState());
163        cli->sendMsg(ResponseCode::VolumeListResult, buffer, false);
164        free(buffer);
165    }
166    cli->sendMsg(ResponseCode::CommandOkay, "Volumes listed.", false);
167    return 0;
168}
169
170int VolumeManager::formatVolume(const char *label) {
171    Volume *v = lookupVolume(label);
172
173    if (!v) {
174        errno = ENOENT;
175        return -1;
176    }
177
178    if (mVolManagerDisabled) {
179        errno = EBUSY;
180        return -1;
181    }
182
183    return v->formatVol();
184}
185
186int VolumeManager::getObbMountPath(const char *sourceFile, char *mountPath, int mountPathLen) {
187    char idHash[33];
188    if (!asecHash(sourceFile, idHash, sizeof(idHash))) {
189        SLOGE("Hash of '%s' failed (%s)", sourceFile, strerror(errno));
190        return -1;
191    }
192
193    memset(mountPath, 0, mountPathLen);
194    snprintf(mountPath, mountPathLen, "%s/%s", Volume::LOOPDIR, idHash);
195
196    if (access(mountPath, F_OK)) {
197        errno = ENOENT;
198        return -1;
199    }
200
201    return 0;
202}
203
204int VolumeManager::getAsecMountPath(const char *id, char *buffer, int maxlen) {
205    char asecFileName[255];
206
207    if (findAsec(id, asecFileName, sizeof(asecFileName))) {
208        SLOGE("Couldn't find ASEC %s", id);
209        return -1;
210    }
211
212    memset(buffer, 0, maxlen);
213    if (access(asecFileName, F_OK)) {
214        errno = ENOENT;
215        return -1;
216    }
217
218    snprintf(buffer, maxlen, "%s/%s", Volume::ASECDIR, id);
219    return 0;
220}
221
222int VolumeManager::getAsecFilesystemPath(const char *id, char *buffer, int maxlen) {
223    char asecFileName[255];
224
225    if (findAsec(id, asecFileName, sizeof(asecFileName))) {
226        SLOGE("Couldn't find ASEC %s", id);
227        return -1;
228    }
229
230    memset(buffer, 0, maxlen);
231    if (access(asecFileName, F_OK)) {
232        errno = ENOENT;
233        return -1;
234    }
235
236    snprintf(buffer, maxlen, "%s", asecFileName);
237    return 0;
238}
239
240int VolumeManager::createAsec(const char *id, unsigned int numSectors, const char *fstype,
241        const char *key, const int ownerUid, bool isExternal) {
242    struct asec_superblock sb;
243    memset(&sb, 0, sizeof(sb));
244
245    const bool wantFilesystem = strcmp(fstype, "none");
246    bool usingExt4 = false;
247    if (wantFilesystem) {
248        usingExt4 = !strcmp(fstype, "ext4");
249        if (usingExt4) {
250            sb.c_opts |= ASEC_SB_C_OPTS_EXT4;
251        } else if (strcmp(fstype, "fat")) {
252            SLOGE("Invalid filesystem type %s", fstype);
253            errno = EINVAL;
254            return -1;
255        }
256    }
257
258    sb.magic = ASEC_SB_MAGIC;
259    sb.ver = ASEC_SB_VER;
260
261    if (numSectors < ((1024*1024)/512)) {
262        SLOGE("Invalid container size specified (%d sectors)", numSectors);
263        errno = EINVAL;
264        return -1;
265    }
266
267    if (lookupVolume(id)) {
268        SLOGE("ASEC id '%s' currently exists", id);
269        errno = EADDRINUSE;
270        return -1;
271    }
272
273    char asecFileName[255];
274
275    if (!findAsec(id, asecFileName, sizeof(asecFileName))) {
276        SLOGE("ASEC file '%s' currently exists - destroy it first! (%s)",
277                asecFileName, strerror(errno));
278        errno = EADDRINUSE;
279        return -1;
280    }
281
282    const char *asecDir = isExternal ? Volume::SEC_ASECDIR_EXT : Volume::SEC_ASECDIR_INT;
283
284    snprintf(asecFileName, sizeof(asecFileName), "%s/%s.asec", asecDir, id);
285
286    if (!access(asecFileName, F_OK)) {
287        SLOGE("ASEC file '%s' currently exists - destroy it first! (%s)",
288                asecFileName, strerror(errno));
289        errno = EADDRINUSE;
290        return -1;
291    }
292
293    /*
294     * Add some headroom
295     */
296    unsigned fatSize = (((numSectors * 4) / 512) + 1) * 2;
297    unsigned numImgSectors = numSectors + fatSize + 2;
298
299    if (numImgSectors % 63) {
300        numImgSectors += (63 - (numImgSectors % 63));
301    }
302
303    // Add +1 for our superblock which is at the end
304    if (Loop::createImageFile(asecFileName, numImgSectors + 1)) {
305        SLOGE("ASEC image file creation failed (%s)", strerror(errno));
306        return -1;
307    }
308
309    char idHash[33];
310    if (!asecHash(id, idHash, sizeof(idHash))) {
311        SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
312        unlink(asecFileName);
313        return -1;
314    }
315
316    char loopDevice[255];
317    if (Loop::create(idHash, asecFileName, loopDevice, sizeof(loopDevice))) {
318        SLOGE("ASEC loop device creation failed (%s)", strerror(errno));
319        unlink(asecFileName);
320        return -1;
321    }
322
323    char dmDevice[255];
324    bool cleanupDm = false;
325
326    if (strcmp(key, "none")) {
327        // XXX: This is all we support for now
328        sb.c_cipher = ASEC_SB_C_CIPHER_TWOFISH;
329        if (Devmapper::create(idHash, loopDevice, key, numImgSectors, dmDevice,
330                             sizeof(dmDevice))) {
331            SLOGE("ASEC device mapping failed (%s)", strerror(errno));
332            Loop::destroyByDevice(loopDevice);
333            unlink(asecFileName);
334            return -1;
335        }
336        cleanupDm = true;
337    } else {
338        sb.c_cipher = ASEC_SB_C_CIPHER_NONE;
339        strcpy(dmDevice, loopDevice);
340    }
341
342    /*
343     * Drop down the superblock at the end of the file
344     */
345
346    int sbfd = open(loopDevice, O_RDWR);
347    if (sbfd < 0) {
348        SLOGE("Failed to open new DM device for superblock write (%s)", strerror(errno));
349        if (cleanupDm) {
350            Devmapper::destroy(idHash);
351        }
352        Loop::destroyByDevice(loopDevice);
353        unlink(asecFileName);
354        return -1;
355    }
356
357    if (lseek(sbfd, (numImgSectors * 512), SEEK_SET) < 0) {
358        close(sbfd);
359        SLOGE("Failed to lseek for superblock (%s)", strerror(errno));
360        if (cleanupDm) {
361            Devmapper::destroy(idHash);
362        }
363        Loop::destroyByDevice(loopDevice);
364        unlink(asecFileName);
365        return -1;
366    }
367
368    if (write(sbfd, &sb, sizeof(sb)) != sizeof(sb)) {
369        close(sbfd);
370        SLOGE("Failed to write superblock (%s)", strerror(errno));
371        if (cleanupDm) {
372            Devmapper::destroy(idHash);
373        }
374        Loop::destroyByDevice(loopDevice);
375        unlink(asecFileName);
376        return -1;
377    }
378    close(sbfd);
379
380    if (wantFilesystem) {
381        int formatStatus;
382        if (usingExt4) {
383            formatStatus = Ext4::format(dmDevice);
384        } else {
385            formatStatus = Fat::format(dmDevice, numImgSectors);
386        }
387
388        if (formatStatus < 0) {
389            SLOGE("ASEC fs format failed (%s)", strerror(errno));
390            if (cleanupDm) {
391                Devmapper::destroy(idHash);
392            }
393            Loop::destroyByDevice(loopDevice);
394            unlink(asecFileName);
395            return -1;
396        }
397
398        char mountPoint[255];
399
400        snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id);
401        if (mkdir(mountPoint, 0000)) {
402            if (errno != EEXIST) {
403                SLOGE("Mountpoint creation failed (%s)", strerror(errno));
404                if (cleanupDm) {
405                    Devmapper::destroy(idHash);
406                }
407                Loop::destroyByDevice(loopDevice);
408                unlink(asecFileName);
409                return -1;
410            }
411        }
412
413        int mountStatus;
414        if (usingExt4) {
415            mountStatus = Ext4::doMount(dmDevice, mountPoint, false, false, false);
416        } else {
417            mountStatus = Fat::doMount(dmDevice, mountPoint, false, false, false, ownerUid, 0, 0000,
418                    false);
419        }
420
421        if (mountStatus) {
422            SLOGE("ASEC FAT mount failed (%s)", strerror(errno));
423            if (cleanupDm) {
424                Devmapper::destroy(idHash);
425            }
426            Loop::destroyByDevice(loopDevice);
427            unlink(asecFileName);
428            return -1;
429        }
430
431        if (usingExt4) {
432            int dirfd = open(mountPoint, O_DIRECTORY);
433            if (dirfd >= 0) {
434                if (fchown(dirfd, ownerUid, AID_SYSTEM)
435                        || fchmod(dirfd, S_IRUSR | S_IWUSR | S_IXUSR | S_ISGID | S_IRGRP | S_IXGRP)) {
436                    SLOGI("Cannot chown/chmod new ASEC mount point %s", mountPoint);
437                }
438                close(dirfd);
439            }
440        }
441    } else {
442        SLOGI("Created raw secure container %s (no filesystem)", id);
443    }
444
445    mActiveContainers->push_back(new ContainerData(strdup(id), ASEC));
446    return 0;
447}
448
449int VolumeManager::finalizeAsec(const char *id) {
450    char asecFileName[255];
451    char loopDevice[255];
452    char mountPoint[255];
453
454    if (findAsec(id, asecFileName, sizeof(asecFileName))) {
455        SLOGE("Couldn't find ASEC %s", id);
456        return -1;
457    }
458
459    char idHash[33];
460    if (!asecHash(id, idHash, sizeof(idHash))) {
461        SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
462        return -1;
463    }
464
465    if (Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
466        SLOGE("Unable to finalize %s (%s)", id, strerror(errno));
467        return -1;
468    }
469
470    unsigned int nr_sec = 0;
471    struct asec_superblock sb;
472
473    if (Loop::lookupInfo(loopDevice, &sb, &nr_sec)) {
474        return -1;
475    }
476
477    snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id);
478
479    int result = 0;
480    if (sb.c_opts & ASEC_SB_C_OPTS_EXT4) {
481        result = Ext4::doMount(loopDevice, mountPoint, true, true, true);
482    } else {
483        result = Fat::doMount(loopDevice, mountPoint, true, true, true, 0, 0, 0227, false);
484    }
485
486    if (result) {
487        SLOGE("ASEC finalize mount failed (%s)", strerror(errno));
488        return -1;
489    }
490
491    if (mDebug) {
492        SLOGD("ASEC %s finalized", id);
493    }
494    return 0;
495}
496
497int VolumeManager::fixupAsecPermissions(const char *id, gid_t gid, const char* filename) {
498    char asecFileName[255];
499    char loopDevice[255];
500    char mountPoint[255];
501
502    if (gid < AID_APP) {
503        SLOGE("Group ID is not in application range");
504        return -1;
505    }
506
507    if (findAsec(id, asecFileName, sizeof(asecFileName))) {
508        SLOGE("Couldn't find ASEC %s", id);
509        return -1;
510    }
511
512    char idHash[33];
513    if (!asecHash(id, idHash, sizeof(idHash))) {
514        SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
515        return -1;
516    }
517
518    if (Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
519        SLOGE("Unable fix permissions during lookup on %s (%s)", id, strerror(errno));
520        return -1;
521    }
522
523    unsigned int nr_sec = 0;
524    struct asec_superblock sb;
525
526    if (Loop::lookupInfo(loopDevice, &sb, &nr_sec)) {
527        return -1;
528    }
529
530    snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id);
531
532    int result = 0;
533    if ((sb.c_opts & ASEC_SB_C_OPTS_EXT4) == 0) {
534        return 0;
535    }
536
537    int ret = Ext4::doMount(loopDevice, mountPoint,
538            false /* read-only */,
539            true  /* remount */,
540            false /* executable */);
541    if (ret) {
542        SLOGE("Unable remount to fix permissions for %s (%s)", id, strerror(errno));
543        return -1;
544    }
545
546    char *paths[] = { mountPoint, NULL };
547
548    FTS *fts = fts_open(paths, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL);
549    if (fts) {
550        // Traverse the entire hierarchy and chown to system UID.
551        for (FTSENT *ftsent = fts_read(fts); ftsent != NULL; ftsent = fts_read(fts)) {
552            // We don't care about the lost+found directory.
553            if (!strcmp(ftsent->fts_name, "lost+found")) {
554                continue;
555            }
556
557            /*
558             * There can only be one file marked as private right now.
559             * This should be more robust, but it satisfies the requirements
560             * we have for right now.
561             */
562            const bool privateFile = !strcmp(ftsent->fts_name, filename);
563
564            int fd = open(ftsent->fts_accpath, O_NOFOLLOW);
565            if (fd < 0) {
566                SLOGE("Couldn't open file %s: %s", ftsent->fts_accpath, strerror(errno));
567                result = -1;
568                continue;
569            }
570
571            result |= fchown(fd, AID_SYSTEM, privateFile? gid : AID_SYSTEM);
572
573            if (ftsent->fts_info & FTS_D) {
574                result |= fchmod(fd, 0755);
575            } else if (ftsent->fts_info & FTS_F) {
576                result |= fchmod(fd, privateFile ? 0640 : 0644);
577            }
578            close(fd);
579        }
580        fts_close(fts);
581
582        // Finally make the directory readable by everyone.
583        int dirfd = open(mountPoint, O_DIRECTORY);
584        if (dirfd < 0 || fchmod(dirfd, 0755)) {
585            SLOGE("Couldn't change owner of existing directory %s: %s", mountPoint, strerror(errno));
586            result |= -1;
587        }
588        close(dirfd);
589    } else {
590        result |= -1;
591    }
592
593    result |= Ext4::doMount(loopDevice, mountPoint,
594            true /* read-only */,
595            true /* remount */,
596            true /* execute */);
597
598    if (result) {
599        SLOGE("ASEC fix permissions failed (%s)", strerror(errno));
600        return -1;
601    }
602
603    if (mDebug) {
604        SLOGD("ASEC %s permissions fixed", id);
605    }
606    return 0;
607}
608
609int VolumeManager::renameAsec(const char *id1, const char *id2) {
610    char asecFilename1[255];
611    char *asecFilename2;
612    char mountPoint[255];
613
614    const char *dir;
615
616    if (findAsec(id1, asecFilename1, sizeof(asecFilename1), &dir)) {
617        SLOGE("Couldn't find ASEC %s", id1);
618        return -1;
619    }
620
621    asprintf(&asecFilename2, "%s/%s.asec", dir, id2);
622
623    snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id1);
624    if (isMountpointMounted(mountPoint)) {
625        SLOGW("Rename attempt when src mounted");
626        errno = EBUSY;
627        goto out_err;
628    }
629
630    snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id2);
631    if (isMountpointMounted(mountPoint)) {
632        SLOGW("Rename attempt when dst mounted");
633        errno = EBUSY;
634        goto out_err;
635    }
636
637    if (!access(asecFilename2, F_OK)) {
638        SLOGE("Rename attempt when dst exists");
639        errno = EADDRINUSE;
640        goto out_err;
641    }
642
643    if (rename(asecFilename1, asecFilename2)) {
644        SLOGE("Rename of '%s' to '%s' failed (%s)", asecFilename1, asecFilename2, strerror(errno));
645        goto out_err;
646    }
647
648    free(asecFilename2);
649    return 0;
650
651out_err:
652    free(asecFilename2);
653    return -1;
654}
655
656#define UNMOUNT_RETRIES 5
657#define UNMOUNT_SLEEP_BETWEEN_RETRY_MS (1000 * 1000)
658int VolumeManager::unmountAsec(const char *id, bool force) {
659    char asecFileName[255];
660    char mountPoint[255];
661
662    if (findAsec(id, asecFileName, sizeof(asecFileName))) {
663        SLOGE("Couldn't find ASEC %s", id);
664        return -1;
665    }
666
667    snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id);
668
669    char idHash[33];
670    if (!asecHash(id, idHash, sizeof(idHash))) {
671        SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
672        return -1;
673    }
674
675    return unmountLoopImage(id, idHash, asecFileName, mountPoint, force);
676}
677
678int VolumeManager::unmountObb(const char *fileName, bool force) {
679    char mountPoint[255];
680
681    char idHash[33];
682    if (!asecHash(fileName, idHash, sizeof(idHash))) {
683        SLOGE("Hash of '%s' failed (%s)", fileName, strerror(errno));
684        return -1;
685    }
686
687    snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::LOOPDIR, idHash);
688
689    return unmountLoopImage(fileName, idHash, fileName, mountPoint, force);
690}
691
692int VolumeManager::unmountLoopImage(const char *id, const char *idHash,
693        const char *fileName, const char *mountPoint, bool force) {
694    if (!isMountpointMounted(mountPoint)) {
695        SLOGE("Unmount request for %s when not mounted", id);
696        errno = ENOENT;
697        return -1;
698    }
699
700    int i, rc;
701    for (i = 1; i <= UNMOUNT_RETRIES; i++) {
702        rc = umount(mountPoint);
703        if (!rc) {
704            break;
705        }
706        if (rc && (errno == EINVAL || errno == ENOENT)) {
707            SLOGI("Container %s unmounted OK", id);
708            rc = 0;
709            break;
710        }
711        SLOGW("%s unmount attempt %d failed (%s)",
712              id, i, strerror(errno));
713
714        int action = 0; // default is to just complain
715
716        if (force) {
717            if (i > (UNMOUNT_RETRIES - 2))
718                action = 2; // SIGKILL
719            else if (i > (UNMOUNT_RETRIES - 3))
720                action = 1; // SIGHUP
721        }
722
723        Process::killProcessesWithOpenFiles(mountPoint, action);
724        usleep(UNMOUNT_SLEEP_BETWEEN_RETRY_MS);
725    }
726
727    if (rc) {
728        errno = EBUSY;
729        SLOGE("Failed to unmount container %s (%s)", id, strerror(errno));
730        return -1;
731    }
732
733    int retries = 10;
734
735    while(retries--) {
736        if (!rmdir(mountPoint)) {
737            break;
738        }
739
740        SLOGW("Failed to rmdir %s (%s)", mountPoint, strerror(errno));
741        usleep(UNMOUNT_SLEEP_BETWEEN_RETRY_MS);
742    }
743
744    if (!retries) {
745        SLOGE("Timed out trying to rmdir %s (%s)", mountPoint, strerror(errno));
746    }
747
748    if (Devmapper::destroy(idHash) && errno != ENXIO) {
749        SLOGE("Failed to destroy devmapper instance (%s)", strerror(errno));
750    }
751
752    char loopDevice[255];
753    if (!Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
754        Loop::destroyByDevice(loopDevice);
755    } else {
756        SLOGW("Failed to find loop device for {%s} (%s)", fileName, strerror(errno));
757    }
758
759    AsecIdCollection::iterator it;
760    for (it = mActiveContainers->begin(); it != mActiveContainers->end(); ++it) {
761        ContainerData* cd = *it;
762        if (!strcmp(cd->id, id)) {
763            free(*it);
764            mActiveContainers->erase(it);
765            break;
766        }
767    }
768    if (it == mActiveContainers->end()) {
769        SLOGW("mActiveContainers is inconsistent!");
770    }
771    return 0;
772}
773
774int VolumeManager::destroyAsec(const char *id, bool force) {
775    char asecFileName[255];
776    char mountPoint[255];
777
778    if (findAsec(id, asecFileName, sizeof(asecFileName))) {
779        SLOGE("Couldn't find ASEC %s", id);
780        return -1;
781    }
782
783    snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id);
784
785    if (isMountpointMounted(mountPoint)) {
786        if (mDebug) {
787            SLOGD("Unmounting container before destroy");
788        }
789        if (unmountAsec(id, force)) {
790            SLOGE("Failed to unmount asec %s for destroy (%s)", id, strerror(errno));
791            return -1;
792        }
793    }
794
795    if (unlink(asecFileName)) {
796        SLOGE("Failed to unlink asec '%s' (%s)", asecFileName, strerror(errno));
797        return -1;
798    }
799
800    if (mDebug) {
801        SLOGD("ASEC %s destroyed", id);
802    }
803    return 0;
804}
805
806bool VolumeManager::isAsecInDirectory(const char *dir, const char *asecName) const {
807    int dirfd = open(dir, O_DIRECTORY);
808    if (dirfd < 0) {
809        SLOGE("Couldn't open internal ASEC dir (%s)", strerror(errno));
810        return -1;
811    }
812
813    bool ret = false;
814
815    if (!faccessat(dirfd, asecName, F_OK, AT_SYMLINK_NOFOLLOW)) {
816        ret = true;
817    }
818
819    close(dirfd);
820
821    return ret;
822}
823
824int VolumeManager::findAsec(const char *id, char *asecPath, size_t asecPathLen,
825        const char **directory) const {
826    int dirfd, fd;
827    const int idLen = strlen(id);
828    char *asecName;
829
830    if (asprintf(&asecName, "%s.asec", id) < 0) {
831        SLOGE("Couldn't allocate string to write ASEC name");
832        return -1;
833    }
834
835    const char *dir;
836    if (isAsecInDirectory(Volume::SEC_ASECDIR_INT, asecName)) {
837        dir = Volume::SEC_ASECDIR_INT;
838    } else if (isAsecInDirectory(Volume::SEC_ASECDIR_EXT, asecName)) {
839        dir = Volume::SEC_ASECDIR_EXT;
840    } else {
841        free(asecName);
842        return -1;
843    }
844
845    if (directory != NULL) {
846        *directory = dir;
847    }
848
849    if (asecPath != NULL) {
850        int written = snprintf(asecPath, asecPathLen, "%s/%s", dir, asecName);
851        if (written < 0 || static_cast<size_t>(written) >= asecPathLen) {
852            free(asecName);
853            return -1;
854        }
855    }
856
857    free(asecName);
858    return 0;
859}
860
861int VolumeManager::mountAsec(const char *id, const char *key, int ownerUid) {
862    char asecFileName[255];
863    char mountPoint[255];
864
865    if (findAsec(id, asecFileName, sizeof(asecFileName))) {
866        SLOGE("Couldn't find ASEC %s", id);
867        return -1;
868    }
869
870    snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::ASECDIR, id);
871
872    if (isMountpointMounted(mountPoint)) {
873        SLOGE("ASEC %s already mounted", id);
874        errno = EBUSY;
875        return -1;
876    }
877
878    char idHash[33];
879    if (!asecHash(id, idHash, sizeof(idHash))) {
880        SLOGE("Hash of '%s' failed (%s)", id, strerror(errno));
881        return -1;
882    }
883
884    char loopDevice[255];
885    if (Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
886        if (Loop::create(idHash, asecFileName, loopDevice, sizeof(loopDevice))) {
887            SLOGE("ASEC loop device creation failed (%s)", strerror(errno));
888            return -1;
889        }
890        if (mDebug) {
891            SLOGD("New loop device created at %s", loopDevice);
892        }
893    } else {
894        if (mDebug) {
895            SLOGD("Found active loopback for %s at %s", asecFileName, loopDevice);
896        }
897    }
898
899    char dmDevice[255];
900    bool cleanupDm = false;
901    int fd;
902    unsigned int nr_sec = 0;
903    struct asec_superblock sb;
904
905    if (Loop::lookupInfo(loopDevice, &sb, &nr_sec)) {
906        return -1;
907    }
908
909    if (mDebug) {
910        SLOGD("Container sb magic/ver (%.8x/%.2x)", sb.magic, sb.ver);
911    }
912    if (sb.magic != ASEC_SB_MAGIC || sb.ver != ASEC_SB_VER) {
913        SLOGE("Bad container magic/version (%.8x/%.2x)", sb.magic, sb.ver);
914        Loop::destroyByDevice(loopDevice);
915        errno = EMEDIUMTYPE;
916        return -1;
917    }
918    nr_sec--; // We don't want the devmapping to extend onto our superblock
919
920    if (strcmp(key, "none")) {
921        if (Devmapper::lookupActive(idHash, dmDevice, sizeof(dmDevice))) {
922            if (Devmapper::create(idHash, loopDevice, key, nr_sec,
923                                  dmDevice, sizeof(dmDevice))) {
924                SLOGE("ASEC device mapping failed (%s)", strerror(errno));
925                Loop::destroyByDevice(loopDevice);
926                return -1;
927            }
928            if (mDebug) {
929                SLOGD("New devmapper instance created at %s", dmDevice);
930            }
931        } else {
932            if (mDebug) {
933                SLOGD("Found active devmapper for %s at %s", asecFileName, dmDevice);
934            }
935        }
936        cleanupDm = true;
937    } else {
938        strcpy(dmDevice, loopDevice);
939    }
940
941    if (mkdir(mountPoint, 0000)) {
942        if (errno != EEXIST) {
943            SLOGE("Mountpoint creation failed (%s)", strerror(errno));
944            if (cleanupDm) {
945                Devmapper::destroy(idHash);
946            }
947            Loop::destroyByDevice(loopDevice);
948            return -1;
949        }
950    }
951
952    /*
953     * The device mapper node needs to be created. Sometimes it takes a
954     * while. Wait for up to 1 second. We could also inspect incoming uevents,
955     * but that would take more effort.
956     */
957    int tries = 25;
958    while (tries--) {
959        if (!access(dmDevice, F_OK) || errno != ENOENT) {
960            break;
961        }
962        usleep(40 * 1000);
963    }
964
965    int result;
966    if (sb.c_opts & ASEC_SB_C_OPTS_EXT4) {
967        result = Ext4::doMount(dmDevice, mountPoint, true, false, true);
968    } else {
969        result = Fat::doMount(dmDevice, mountPoint, true, false, true, ownerUid, 0, 0222, false);
970    }
971
972    if (result) {
973        SLOGE("ASEC mount failed (%s)", strerror(errno));
974        if (cleanupDm) {
975            Devmapper::destroy(idHash);
976        }
977        Loop::destroyByDevice(loopDevice);
978        return -1;
979    }
980
981    mActiveContainers->push_back(new ContainerData(strdup(id), ASEC));
982    if (mDebug) {
983        SLOGD("ASEC %s mounted", id);
984    }
985    return 0;
986}
987
988/**
989 * Mounts an image file <code>img</code>.
990 */
991int VolumeManager::mountObb(const char *img, const char *key, int ownerUid) {
992    char mountPoint[255];
993
994    char idHash[33];
995    if (!asecHash(img, idHash, sizeof(idHash))) {
996        SLOGE("Hash of '%s' failed (%s)", img, strerror(errno));
997        return -1;
998    }
999
1000    snprintf(mountPoint, sizeof(mountPoint), "%s/%s", Volume::LOOPDIR, idHash);
1001
1002    if (isMountpointMounted(mountPoint)) {
1003        SLOGE("Image %s already mounted", img);
1004        errno = EBUSY;
1005        return -1;
1006    }
1007
1008    char loopDevice[255];
1009    if (Loop::lookupActive(idHash, loopDevice, sizeof(loopDevice))) {
1010        if (Loop::create(idHash, img, loopDevice, sizeof(loopDevice))) {
1011            SLOGE("Image loop device creation failed (%s)", strerror(errno));
1012            return -1;
1013        }
1014        if (mDebug) {
1015            SLOGD("New loop device created at %s", loopDevice);
1016        }
1017    } else {
1018        if (mDebug) {
1019            SLOGD("Found active loopback for %s at %s", img, loopDevice);
1020        }
1021    }
1022
1023    char dmDevice[255];
1024    bool cleanupDm = false;
1025    int fd;
1026    unsigned int nr_sec = 0;
1027
1028    if ((fd = open(loopDevice, O_RDWR)) < 0) {
1029        SLOGE("Failed to open loopdevice (%s)", strerror(errno));
1030        Loop::destroyByDevice(loopDevice);
1031        return -1;
1032    }
1033
1034    if (ioctl(fd, BLKGETSIZE, &nr_sec)) {
1035        SLOGE("Failed to get loop size (%s)", strerror(errno));
1036        Loop::destroyByDevice(loopDevice);
1037        close(fd);
1038        return -1;
1039    }
1040
1041    close(fd);
1042
1043    if (strcmp(key, "none")) {
1044        if (Devmapper::lookupActive(idHash, dmDevice, sizeof(dmDevice))) {
1045            if (Devmapper::create(idHash, loopDevice, key, nr_sec,
1046                                  dmDevice, sizeof(dmDevice))) {
1047                SLOGE("ASEC device mapping failed (%s)", strerror(errno));
1048                Loop::destroyByDevice(loopDevice);
1049                return -1;
1050            }
1051            if (mDebug) {
1052                SLOGD("New devmapper instance created at %s", dmDevice);
1053            }
1054        } else {
1055            if (mDebug) {
1056                SLOGD("Found active devmapper for %s at %s", img, dmDevice);
1057            }
1058        }
1059        cleanupDm = true;
1060    } else {
1061        strcpy(dmDevice, loopDevice);
1062    }
1063
1064    if (mkdir(mountPoint, 0755)) {
1065        if (errno != EEXIST) {
1066            SLOGE("Mountpoint creation failed (%s)", strerror(errno));
1067            if (cleanupDm) {
1068                Devmapper::destroy(idHash);
1069            }
1070            Loop::destroyByDevice(loopDevice);
1071            return -1;
1072        }
1073    }
1074
1075    if (Fat::doMount(dmDevice, mountPoint, true, false, true, ownerUid, 0,
1076                     0227, false)) {
1077        SLOGE("Image mount failed (%s)", strerror(errno));
1078        if (cleanupDm) {
1079            Devmapper::destroy(idHash);
1080        }
1081        Loop::destroyByDevice(loopDevice);
1082        return -1;
1083    }
1084
1085    mActiveContainers->push_back(new ContainerData(strdup(img), OBB));
1086    if (mDebug) {
1087        SLOGD("Image %s mounted", img);
1088    }
1089    return 0;
1090}
1091
1092int VolumeManager::mountVolume(const char *label) {
1093    Volume *v = lookupVolume(label);
1094
1095    if (!v) {
1096        errno = ENOENT;
1097        return -1;
1098    }
1099
1100    return v->mountVol();
1101}
1102
1103int VolumeManager::listMountedObbs(SocketClient* cli) {
1104    char device[256];
1105    char mount_path[256];
1106    char rest[256];
1107    FILE *fp;
1108    char line[1024];
1109
1110    if (!(fp = fopen("/proc/mounts", "r"))) {
1111        SLOGE("Error opening /proc/mounts (%s)", strerror(errno));
1112        return -1;
1113    }
1114
1115    // Create a string to compare against that has a trailing slash
1116    int loopDirLen = sizeof(Volume::LOOPDIR);
1117    char loopDir[loopDirLen + 2];
1118    strcpy(loopDir, Volume::LOOPDIR);
1119    loopDir[loopDirLen++] = '/';
1120    loopDir[loopDirLen] = '\0';
1121
1122    while(fgets(line, sizeof(line), fp)) {
1123        line[strlen(line)-1] = '\0';
1124
1125        /*
1126         * Should look like:
1127         * /dev/block/loop0 /mnt/obb/fc99df1323fd36424f864dcb76b76d65 ...
1128         */
1129        sscanf(line, "%255s %255s %255s\n", device, mount_path, rest);
1130
1131        if (!strncmp(mount_path, loopDir, loopDirLen)) {
1132            int fd = open(device, O_RDONLY);
1133            if (fd >= 0) {
1134                struct loop_info64 li;
1135                if (ioctl(fd, LOOP_GET_STATUS64, &li) >= 0) {
1136                    cli->sendMsg(ResponseCode::AsecListResult,
1137                            (const char*) li.lo_file_name, false);
1138                }
1139                close(fd);
1140            }
1141        }
1142    }
1143
1144    fclose(fp);
1145    return 0;
1146}
1147
1148int VolumeManager::shareEnabled(const char *label, const char *method, bool *enabled) {
1149    Volume *v = lookupVolume(label);
1150
1151    if (!v) {
1152        errno = ENOENT;
1153        return -1;
1154    }
1155
1156    if (strcmp(method, "ums")) {
1157        errno = ENOSYS;
1158        return -1;
1159    }
1160
1161    if (v->getState() != Volume::State_Shared) {
1162        *enabled = false;
1163    } else {
1164        *enabled = true;
1165    }
1166    return 0;
1167}
1168
1169int VolumeManager::shareVolume(const char *label, const char *method) {
1170    Volume *v = lookupVolume(label);
1171
1172    if (!v) {
1173        errno = ENOENT;
1174        return -1;
1175    }
1176
1177    /*
1178     * Eventually, we'll want to support additional share back-ends,
1179     * some of which may work while the media is mounted. For now,
1180     * we just support UMS
1181     */
1182    if (strcmp(method, "ums")) {
1183        errno = ENOSYS;
1184        return -1;
1185    }
1186
1187    if (v->getState() == Volume::State_NoMedia) {
1188        errno = ENODEV;
1189        return -1;
1190    }
1191
1192    if (v->getState() != Volume::State_Idle) {
1193        // You need to unmount manually befoe sharing
1194        errno = EBUSY;
1195        return -1;
1196    }
1197
1198    if (mVolManagerDisabled) {
1199        errno = EBUSY;
1200        return -1;
1201    }
1202
1203    dev_t d = v->getShareDevice();
1204    if ((MAJOR(d) == 0) && (MINOR(d) == 0)) {
1205        // This volume does not support raw disk access
1206        errno = EINVAL;
1207        return -1;
1208    }
1209
1210    int fd;
1211    char nodepath[255];
1212    snprintf(nodepath,
1213             sizeof(nodepath), "/dev/block/vold/%d:%d",
1214             MAJOR(d), MINOR(d));
1215
1216    if ((fd = open(MASS_STORAGE_FILE_PATH, O_WRONLY)) < 0) {
1217        SLOGE("Unable to open ums lunfile (%s)", strerror(errno));
1218        return -1;
1219    }
1220
1221    if (write(fd, nodepath, strlen(nodepath)) < 0) {
1222        SLOGE("Unable to write to ums lunfile (%s)", strerror(errno));
1223        close(fd);
1224        return -1;
1225    }
1226
1227    close(fd);
1228    v->handleVolumeShared();
1229    if (mUmsSharingCount++ == 0) {
1230        FILE* fp;
1231        mSavedDirtyRatio = -1; // in case we fail
1232        if ((fp = fopen("/proc/sys/vm/dirty_ratio", "r+"))) {
1233            char line[16];
1234            if (fgets(line, sizeof(line), fp) && sscanf(line, "%d", &mSavedDirtyRatio)) {
1235                fprintf(fp, "%d\n", mUmsDirtyRatio);
1236            } else {
1237                SLOGE("Failed to read dirty_ratio (%s)", strerror(errno));
1238            }
1239            fclose(fp);
1240        } else {
1241            SLOGE("Failed to open /proc/sys/vm/dirty_ratio (%s)", strerror(errno));
1242        }
1243    }
1244    return 0;
1245}
1246
1247int VolumeManager::unshareVolume(const char *label, const char *method) {
1248    Volume *v = lookupVolume(label);
1249
1250    if (!v) {
1251        errno = ENOENT;
1252        return -1;
1253    }
1254
1255    if (strcmp(method, "ums")) {
1256        errno = ENOSYS;
1257        return -1;
1258    }
1259
1260    if (v->getState() != Volume::State_Shared) {
1261        errno = EINVAL;
1262        return -1;
1263    }
1264
1265    int fd;
1266    if ((fd = open(MASS_STORAGE_FILE_PATH, O_WRONLY)) < 0) {
1267        SLOGE("Unable to open ums lunfile (%s)", strerror(errno));
1268        return -1;
1269    }
1270
1271    char ch = 0;
1272    if (write(fd, &ch, 1) < 0) {
1273        SLOGE("Unable to write to ums lunfile (%s)", strerror(errno));
1274        close(fd);
1275        return -1;
1276    }
1277
1278    close(fd);
1279    v->handleVolumeUnshared();
1280    if (--mUmsSharingCount == 0 && mSavedDirtyRatio != -1) {
1281        FILE* fp;
1282        if ((fp = fopen("/proc/sys/vm/dirty_ratio", "r+"))) {
1283            fprintf(fp, "%d\n", mSavedDirtyRatio);
1284            fclose(fp);
1285        } else {
1286            SLOGE("Failed to open /proc/sys/vm/dirty_ratio (%s)", strerror(errno));
1287        }
1288        mSavedDirtyRatio = -1;
1289    }
1290    return 0;
1291}
1292
1293extern "C" int vold_disableVol(const char *label) {
1294    VolumeManager *vm = VolumeManager::Instance();
1295    vm->disableVolumeManager();
1296    vm->unshareVolume(label, "ums");
1297    return vm->unmountVolume(label, true, false);
1298}
1299
1300extern "C" int vold_getNumDirectVolumes(void) {
1301    VolumeManager *vm = VolumeManager::Instance();
1302    return vm->getNumDirectVolumes();
1303}
1304
1305int VolumeManager::getNumDirectVolumes(void) {
1306    VolumeCollection::iterator i;
1307    int n=0;
1308
1309    for (i = mVolumes->begin(); i != mVolumes->end(); ++i) {
1310        if ((*i)->getShareDevice() != (dev_t)0) {
1311            n++;
1312        }
1313    }
1314    return n;
1315}
1316
1317extern "C" int vold_getDirectVolumeList(struct volume_info *vol_list) {
1318    VolumeManager *vm = VolumeManager::Instance();
1319    return vm->getDirectVolumeList(vol_list);
1320}
1321
1322int VolumeManager::getDirectVolumeList(struct volume_info *vol_list) {
1323    VolumeCollection::iterator i;
1324    int n=0;
1325    dev_t d;
1326
1327    for (i = mVolumes->begin(); i != mVolumes->end(); ++i) {
1328        if ((d=(*i)->getShareDevice()) != (dev_t)0) {
1329            (*i)->getVolInfo(&vol_list[n]);
1330            snprintf(vol_list[n].blk_dev, sizeof(vol_list[n].blk_dev),
1331                     "/dev/block/vold/%d:%d",MAJOR(d), MINOR(d));
1332            n++;
1333        }
1334    }
1335
1336    return 0;
1337}
1338
1339int VolumeManager::unmountVolume(const char *label, bool force, bool revert) {
1340    Volume *v = lookupVolume(label);
1341
1342    if (!v) {
1343        errno = ENOENT;
1344        return -1;
1345    }
1346
1347    if (v->getState() == Volume::State_NoMedia) {
1348        errno = ENODEV;
1349        return -1;
1350    }
1351
1352    if (v->getState() != Volume::State_Mounted) {
1353        SLOGW("Attempt to unmount volume which isn't mounted (%d)\n",
1354             v->getState());
1355        errno = EBUSY;
1356        return UNMOUNT_NOT_MOUNTED_ERR;
1357    }
1358
1359    cleanupAsec(v, force);
1360
1361    return v->unmountVol(force, revert);
1362}
1363
1364extern "C" int vold_unmountAllAsecs(void) {
1365    int rc;
1366
1367    VolumeManager *vm = VolumeManager::Instance();
1368    rc = vm->unmountAllAsecsInDir(Volume::SEC_ASECDIR_EXT);
1369    if (vm->unmountAllAsecsInDir(Volume::SEC_ASECDIR_INT)) {
1370        rc = -1;
1371    }
1372    return rc;
1373}
1374
1375#define ID_BUF_LEN 256
1376#define ASEC_SUFFIX ".asec"
1377#define ASEC_SUFFIX_LEN (sizeof(ASEC_SUFFIX) - 1)
1378int VolumeManager::unmountAllAsecsInDir(const char *directory) {
1379    DIR *d = opendir(directory);
1380    int rc = 0;
1381
1382    if (!d) {
1383        SLOGE("Could not open asec dir %s", directory);
1384        return -1;
1385    }
1386
1387    size_t dirent_len = offsetof(struct dirent, d_name) +
1388            pathconf(directory, _PC_NAME_MAX) + 1;
1389
1390    struct dirent *dent = (struct dirent *) malloc(dirent_len);
1391    if (dent == NULL) {
1392        SLOGE("Failed to allocate memory for asec dir");
1393        return -1;
1394    }
1395
1396    struct dirent *result;
1397    while (!readdir_r(d, dent, &result) && result != NULL) {
1398        if (dent->d_name[0] == '.')
1399            continue;
1400        if (dent->d_type != DT_REG)
1401            continue;
1402        size_t name_len = strlen(dent->d_name);
1403        if (name_len > 5 && name_len < (ID_BUF_LEN + ASEC_SUFFIX_LEN - 1) &&
1404                !strcmp(&dent->d_name[name_len - 5], ASEC_SUFFIX)) {
1405            char id[ID_BUF_LEN];
1406            strlcpy(id, dent->d_name, name_len - 4);
1407            if (unmountAsec(id, true)) {
1408                /* Register the error, but try to unmount more asecs */
1409                rc = -1;
1410            }
1411        }
1412    }
1413    closedir(d);
1414
1415    free(dent);
1416
1417    return rc;
1418}
1419
1420/*
1421 * Looks up a volume by it's label or mount-point
1422 */
1423Volume *VolumeManager::lookupVolume(const char *label) {
1424    VolumeCollection::iterator i;
1425
1426    for (i = mVolumes->begin(); i != mVolumes->end(); ++i) {
1427        if (label[0] == '/') {
1428            if (!strcmp(label, (*i)->getMountpoint()))
1429                return (*i);
1430        } else {
1431            if (!strcmp(label, (*i)->getLabel()))
1432                return (*i);
1433        }
1434    }
1435    return NULL;
1436}
1437
1438bool VolumeManager::isMountpointMounted(const char *mp)
1439{
1440    char device[256];
1441    char mount_path[256];
1442    char rest[256];
1443    FILE *fp;
1444    char line[1024];
1445
1446    if (!(fp = fopen("/proc/mounts", "r"))) {
1447        SLOGE("Error opening /proc/mounts (%s)", strerror(errno));
1448        return false;
1449    }
1450
1451    while(fgets(line, sizeof(line), fp)) {
1452        line[strlen(line)-1] = '\0';
1453        sscanf(line, "%255s %255s %255s\n", device, mount_path, rest);
1454        if (!strcmp(mount_path, mp)) {
1455            fclose(fp);
1456            return true;
1457        }
1458    }
1459
1460    fclose(fp);
1461    return false;
1462}
1463
1464int VolumeManager::cleanupAsec(Volume *v, bool force) {
1465    while(mActiveContainers->size()) {
1466        AsecIdCollection::iterator it = mActiveContainers->begin();
1467        ContainerData* cd = *it;
1468        SLOGI("Unmounting ASEC %s (dependant on %s)", cd->id, v->getMountpoint());
1469        if (cd->type == ASEC) {
1470            if (unmountAsec(cd->id, force)) {
1471                SLOGE("Failed to unmount ASEC %s (%s)", cd->id, strerror(errno));
1472                return -1;
1473            }
1474        } else if (cd->type == OBB) {
1475            if (unmountObb(cd->id, force)) {
1476                SLOGE("Failed to unmount OBB %s (%s)", cd->id, strerror(errno));
1477                return -1;
1478            }
1479        } else {
1480            SLOGE("Unknown container type %d!", cd->type);
1481            return -1;
1482        }
1483    }
1484    return 0;
1485}
1486
1487