1 /*
2 ** Copyright 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 "InstalldNativeService.h"
18
19 #define ATRACE_TAG ATRACE_TAG_PACKAGE_MANAGER
20
21 #include <algorithm>
22 #include <errno.h>
23 #include <fstream>
24 #include <fts.h>
25 #include <functional>
26 #include <inttypes.h>
27 #include <regex>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <sys/capability.h>
31 #include <sys/file.h>
32 #include <sys/ioctl.h>
33 #include <sys/mman.h>
34 #include <sys/mount.h>
35 #include <sys/resource.h>
36 #include <sys/stat.h>
37 #include <sys/statvfs.h>
38 #include <sys/types.h>
39 #include <sys/wait.h>
40 #include <sys/xattr.h>
41 #include <unistd.h>
42
43 #include <android-base/file.h>
44 #include <android-base/logging.h>
45 #include <android-base/parseint.h>
46 #include <android-base/properties.h>
47 #include <android-base/scopeguard.h>
48 #include <android-base/stringprintf.h>
49 #include <android-base/strings.h>
50 #include <android-base/unique_fd.h>
51 #include <cutils/ashmem.h>
52 #include <cutils/fs.h>
53 #include <cutils/properties.h>
54 #include <cutils/sched_policy.h>
55 #include <log/log.h> // TODO: Move everything to base/logging.
56 #include <logwrap/logwrap.h>
57 #include <private/android_filesystem_config.h>
58 #include <private/android_projectid_config.h>
59 #include <selinux/android.h>
60 #include <system/thread_defs.h>
61 #include <utils/Trace.h>
62
63 #include "dexopt.h"
64 #include "globals.h"
65 #include "installd_deps.h"
66 #include "otapreopt_utils.h"
67 #include "utils.h"
68 #include "view_compiler.h"
69
70 #include "CacheTracker.h"
71 #include "CrateManager.h"
72 #include "MatchExtensionGen.h"
73 #include "QuotaUtils.h"
74
75 #ifndef LOG_TAG
76 #define LOG_TAG "installd"
77 #endif
78
79 using android::base::ParseUint;
80 using android::base::StringPrintf;
81 using std::endl;
82
83 namespace android {
84 namespace installd {
85
86 // An uuid used in unit tests.
87 static constexpr const char* kTestUuid = "TEST";
88
89 static constexpr const mode_t kRollbackFolderMode = 0700;
90
91 static constexpr const char* kCpPath = "/system/bin/cp";
92 static constexpr const char* kXattrDefault = "user.default";
93
94 static constexpr const char* kDataMirrorCePath = "/data_mirror/data_ce";
95 static constexpr const char* kDataMirrorDePath = "/data_mirror/data_de";
96
97 static constexpr const int MIN_RESTRICTED_HOME_SDK_VERSION = 24; // > M
98
99 static constexpr const char* PKG_LIB_POSTFIX = "/lib";
100 static constexpr const char* CACHE_DIR_POSTFIX = "/cache";
101 static constexpr const char* CODE_CACHE_DIR_POSTFIX = "/code_cache";
102
103 // fsverity assumes the page size is always 4096. If not, the feature can not be
104 // enabled.
105 static constexpr int kVerityPageSize = 4096;
106 static constexpr size_t kSha256Size = 32;
107 static constexpr const char* kPropApkVerityMode = "ro.apk_verity.mode";
108 static constexpr const char* kFuseProp = "persist.sys.fuse";
109
110 /**
111 * Property to control if app data isolation is enabled.
112 */
113 static constexpr const char* kAppDataIsolationEnabledProperty = "persist.zygote.app_data_isolation";
114 static constexpr const char* kMntSdcardfs = "/mnt/runtime/default/";
115 static constexpr const char* kMntFuse = "/mnt/pass_through/0/";
116
117 static std::atomic<bool> sAppDataIsolationEnabled(false);
118
119 namespace {
120
121 constexpr const char* kDump = "android.permission.DUMP";
122
ok()123 static binder::Status ok() {
124 return binder::Status::ok();
125 }
126
exception(uint32_t code,const std::string & msg)127 static binder::Status exception(uint32_t code, const std::string& msg) {
128 LOG(ERROR) << msg << " (" << code << ")";
129 return binder::Status::fromExceptionCode(code, String8(msg.c_str()));
130 }
131
error()132 static binder::Status error() {
133 return binder::Status::fromServiceSpecificError(errno);
134 }
135
error(const std::string & msg)136 static binder::Status error(const std::string& msg) {
137 PLOG(ERROR) << msg;
138 return binder::Status::fromServiceSpecificError(errno, String8(msg.c_str()));
139 }
140
error(uint32_t code,const std::string & msg)141 static binder::Status error(uint32_t code, const std::string& msg) {
142 LOG(ERROR) << msg << " (" << code << ")";
143 return binder::Status::fromServiceSpecificError(code, String8(msg.c_str()));
144 }
145
checkPermission(const char * permission)146 binder::Status checkPermission(const char* permission) {
147 pid_t pid;
148 uid_t uid;
149
150 if (checkCallingPermission(String16(permission), reinterpret_cast<int32_t*>(&pid),
151 reinterpret_cast<int32_t*>(&uid))) {
152 return ok();
153 } else {
154 return exception(binder::Status::EX_SECURITY,
155 StringPrintf("UID %d / PID %d lacks permission %s", uid, pid, permission));
156 }
157 }
158
checkUid(uid_t expectedUid)159 binder::Status checkUid(uid_t expectedUid) {
160 uid_t uid = IPCThreadState::self()->getCallingUid();
161 if (uid == expectedUid || uid == AID_ROOT) {
162 return ok();
163 } else {
164 return exception(binder::Status::EX_SECURITY,
165 StringPrintf("UID %d is not expected UID %d", uid, expectedUid));
166 }
167 }
168
checkArgumentUuid(const std::optional<std::string> & uuid)169 binder::Status checkArgumentUuid(const std::optional<std::string>& uuid) {
170 if (!uuid || is_valid_filename(*uuid)) {
171 return ok();
172 } else {
173 return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
174 StringPrintf("UUID %s is malformed", uuid->c_str()));
175 }
176 }
177
checkArgumentUuidTestOrNull(const std::optional<std::string> & uuid)178 binder::Status checkArgumentUuidTestOrNull(const std::optional<std::string>& uuid) {
179 if (!uuid || strcmp(uuid->c_str(), kTestUuid) == 0) {
180 return ok();
181 } else {
182 return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
183 StringPrintf("UUID must be null or \"%s\", got: %s", kTestUuid, uuid->c_str()));
184 }
185 }
186
checkArgumentPackageName(const std::string & packageName)187 binder::Status checkArgumentPackageName(const std::string& packageName) {
188 if (is_valid_package_name(packageName)) {
189 return ok();
190 } else {
191 return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
192 StringPrintf("Package name %s is malformed", packageName.c_str()));
193 }
194 }
195
checkArgumentPath(const std::string & path)196 binder::Status checkArgumentPath(const std::string& path) {
197 if (path.empty()) {
198 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, "Missing path");
199 }
200 if (path[0] != '/') {
201 return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
202 StringPrintf("Path %s is relative", path.c_str()));
203 }
204 if ((path + '/').find("/../") != std::string::npos) {
205 return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
206 StringPrintf("Path %s is shady", path.c_str()));
207 }
208 for (const char& c : path) {
209 if (c == '\0' || c == '\n') {
210 return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
211 StringPrintf("Path %s is malformed", path.c_str()));
212 }
213 }
214 return ok();
215 }
216
checkArgumentPath(const std::optional<std::string> & path)217 binder::Status checkArgumentPath(const std::optional<std::string>& path) {
218 if (path) {
219 return checkArgumentPath(*path);
220 } else {
221 return ok();
222 }
223 }
224
225 #define ENFORCE_UID(uid) { \
226 binder::Status status = checkUid((uid)); \
227 if (!status.isOk()) { \
228 return status; \
229 } \
230 }
231
232 #define CHECK_ARGUMENT_UUID(uuid) { \
233 binder::Status status = checkArgumentUuid((uuid)); \
234 if (!status.isOk()) { \
235 return status; \
236 } \
237 }
238
239 #define CHECK_ARGUMENT_UUID_IS_TEST_OR_NULL(uuid) { \
240 auto status = checkArgumentUuidTestOrNull(uuid); \
241 if (!status.isOk()) { \
242 return status; \
243 } \
244 } \
245
246 #define CHECK_ARGUMENT_PACKAGE_NAME(packageName) { \
247 binder::Status status = \
248 checkArgumentPackageName((packageName)); \
249 if (!status.isOk()) { \
250 return status; \
251 } \
252 }
253
254 #define CHECK_ARGUMENT_PATH(path) { \
255 binder::Status status = checkArgumentPath((path)); \
256 if (!status.isOk()) { \
257 return status; \
258 } \
259 }
260
261 #define ASSERT_PAGE_SIZE_4K() { \
262 if (getpagesize() != kVerityPageSize) { \
263 return error("FSVerity only supports 4K pages"); \
264 } \
265 }
266
267 } // namespace
268
start()269 status_t InstalldNativeService::start() {
270 IPCThreadState::self()->disableBackgroundScheduling(true);
271 status_t ret = BinderService<InstalldNativeService>::publish();
272 if (ret != android::OK) {
273 return ret;
274 }
275 sp<ProcessState> ps(ProcessState::self());
276 ps->startThreadPool();
277 ps->giveThreadPoolName();
278 sAppDataIsolationEnabled = android::base::GetBoolProperty(
279 kAppDataIsolationEnabledProperty, true);
280 return android::OK;
281 }
282
dump(int fd,const Vector<String16> &)283 status_t InstalldNativeService::dump(int fd, const Vector<String16> & /* args */) {
284 auto out = std::fstream(StringPrintf("/proc/self/fd/%d", fd));
285 const binder::Status dump_permission = checkPermission(kDump);
286 if (!dump_permission.isOk()) {
287 out << dump_permission.toString8() << endl;
288 return PERMISSION_DENIED;
289 }
290 std::lock_guard<std::recursive_mutex> lock(mLock);
291
292 out << "installd is happy!" << endl;
293
294 {
295 std::lock_guard<std::recursive_mutex> lock(mMountsLock);
296 out << endl << "Storage mounts:" << endl;
297 for (const auto& n : mStorageMounts) {
298 out << " " << n.first << " = " << n.second << endl;
299 }
300 }
301
302 {
303 std::lock_guard<std::recursive_mutex> lock(mQuotasLock);
304 out << endl << "Per-UID cache quotas:" << endl;
305 for (const auto& n : mCacheQuotas) {
306 out << " " << n.first << " = " << n.second << endl;
307 }
308 }
309
310 out << endl;
311 out.flush();
312
313 return NO_ERROR;
314 }
315
316 /**
317 * Perform restorecon of the given path, but only perform recursive restorecon
318 * if the label of that top-level file actually changed. This can save us
319 * significant time by avoiding no-op traversals of large filesystem trees.
320 */
restorecon_app_data_lazy(const std::string & path,const std::string & seInfo,uid_t uid,bool existing)321 static int restorecon_app_data_lazy(const std::string& path, const std::string& seInfo, uid_t uid,
322 bool existing) {
323 int res = 0;
324 char* before = nullptr;
325 char* after = nullptr;
326
327 // Note that SELINUX_ANDROID_RESTORECON_DATADATA flag is set by
328 // libselinux. Not needed here.
329
330 if (lgetfilecon(path.c_str(), &before) < 0) {
331 PLOG(ERROR) << "Failed before getfilecon for " << path;
332 goto fail;
333 }
334 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 0) < 0) {
335 PLOG(ERROR) << "Failed top-level restorecon for " << path;
336 goto fail;
337 }
338 if (lgetfilecon(path.c_str(), &after) < 0) {
339 PLOG(ERROR) << "Failed after getfilecon for " << path;
340 goto fail;
341 }
342
343 // If the initial top-level restorecon above changed the label, then go
344 // back and restorecon everything recursively
345 if (strcmp(before, after)) {
346 if (existing) {
347 LOG(DEBUG) << "Detected label change from " << before << " to " << after << " at "
348 << path << "; running recursive restorecon";
349 }
350 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid,
351 SELINUX_ANDROID_RESTORECON_RECURSE) < 0) {
352 PLOG(ERROR) << "Failed recursive restorecon for " << path;
353 goto fail;
354 }
355 }
356
357 goto done;
358 fail:
359 res = -1;
360 done:
361 free(before);
362 free(after);
363 return res;
364 }
365
restorecon_app_data_lazy(const std::string & parent,const char * name,const std::string & seInfo,uid_t uid,bool existing)366 static int restorecon_app_data_lazy(const std::string& parent, const char* name,
367 const std::string& seInfo, uid_t uid, bool existing) {
368 return restorecon_app_data_lazy(StringPrintf("%s/%s", parent.c_str(), name), seInfo, uid,
369 existing);
370 }
371
prepare_app_dir(const std::string & path,mode_t target_mode,uid_t uid)372 static int prepare_app_dir(const std::string& path, mode_t target_mode, uid_t uid) {
373 if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, uid) != 0) {
374 PLOG(ERROR) << "Failed to prepare " << path;
375 return -1;
376 }
377 return 0;
378 }
379
prepare_app_profile_dir(const std::string & packageName,int32_t appId,int32_t userId)380 static bool prepare_app_profile_dir(const std::string& packageName, int32_t appId, int32_t userId) {
381 if (!property_get_bool("dalvik.vm.usejitprofiles", false)) {
382 return true;
383 }
384
385 int32_t uid = multiuser_get_uid(userId, appId);
386 int shared_app_gid = multiuser_get_shared_gid(userId, appId);
387 if (shared_app_gid == -1) {
388 // TODO(calin): this should no longer be possible but do not continue if we don't get
389 // a valid shared gid.
390 PLOG(WARNING) << "Invalid shared_app_gid for " << packageName;
391 return true;
392 }
393
394 const std::string profile_dir =
395 create_primary_current_profile_package_dir_path(userId, packageName);
396 // read-write-execute only for the app user.
397 if (fs_prepare_dir_strict(profile_dir.c_str(), 0700, uid, uid) != 0) {
398 PLOG(ERROR) << "Failed to prepare " << profile_dir;
399 return false;
400 }
401 if (selinux_android_restorecon(profile_dir.c_str(), 0)) {
402 PLOG(ERROR) << "Failed to restorecon " << profile_dir;
403 return false;
404 }
405
406 const std::string ref_profile_path =
407 create_primary_reference_profile_package_dir_path(packageName);
408
409 // Prepare the reference profile directory. Note that we use the non strict version of
410 // fs_prepare_dir. This will fix the permission and the ownership to the correct values.
411 // This is particularly important given that in O there were some fixes for how the
412 // shared_app_gid is computed.
413 //
414 // Note that by the time we get here we know that we are using a correct uid (otherwise
415 // prepare_app_dir and the above fs_prepare_file_strict which check the uid). So we
416 // are sure that the gid being used belongs to the owning app and not someone else.
417 //
418 // dex2oat/profman runs under the shared app gid and it needs to read/write reference profiles.
419 if (fs_prepare_dir(ref_profile_path.c_str(), 0770, AID_SYSTEM, shared_app_gid) != 0) {
420 PLOG(ERROR) << "Failed to prepare " << ref_profile_path;
421 return false;
422 }
423
424 return true;
425 }
426
createAppData(const std::optional<std::string> & uuid,const std::string & packageName,int32_t userId,int32_t flags,int32_t appId,const std::string & seInfo,int32_t targetSdkVersion,int64_t * _aidl_return)427 binder::Status InstalldNativeService::createAppData(const std::optional<std::string>& uuid,
428 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId,
429 const std::string& seInfo, int32_t targetSdkVersion, int64_t* _aidl_return) {
430 ENFORCE_UID(AID_SYSTEM);
431 CHECK_ARGUMENT_UUID(uuid);
432 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
433 std::lock_guard<std::recursive_mutex> lock(mLock);
434
435 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
436 const char* pkgname = packageName.c_str();
437
438 // Assume invalid inode unless filled in below
439 if (_aidl_return != nullptr) *_aidl_return = -1;
440
441 int32_t uid = multiuser_get_uid(userId, appId);
442 int32_t cacheGid = multiuser_get_cache_gid(userId, appId);
443 mode_t targetMode = targetSdkVersion >= MIN_RESTRICTED_HOME_SDK_VERSION ? 0700 : 0751;
444
445 // If UID doesn't have a specific cache GID, use UID value
446 if (cacheGid == -1) {
447 cacheGid = uid;
448 }
449
450 if (flags & FLAG_STORAGE_CE) {
451 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname);
452 bool existing = (access(path.c_str(), F_OK) == 0);
453
454 if (prepare_app_dir(path, targetMode, uid) ||
455 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) ||
456 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) {
457 return error("Failed to prepare " + path);
458 }
459
460 // Consider restorecon over contents if label changed
461 if (restorecon_app_data_lazy(path, seInfo, uid, existing) ||
462 restorecon_app_data_lazy(path, "cache", seInfo, uid, existing) ||
463 restorecon_app_data_lazy(path, "code_cache", seInfo, uid, existing)) {
464 return error("Failed to restorecon " + path);
465 }
466
467 // Remember inode numbers of cache directories so that we can clear
468 // contents while CE storage is locked
469 if (write_path_inode(path, "cache", kXattrInodeCache) ||
470 write_path_inode(path, "code_cache", kXattrInodeCodeCache)) {
471 return error("Failed to write_path_inode for " + path);
472 }
473
474 // And return the CE inode of the top-level data directory so we can
475 // clear contents while CE storage is locked
476 if (_aidl_return != nullptr) {
477 ino_t result;
478 if (get_path_inode(path, &result) != 0) {
479 return error("Failed to get_path_inode for " + path);
480 }
481 *_aidl_return = static_cast<uint64_t>(result);
482 }
483 }
484 if (flags & FLAG_STORAGE_DE) {
485 auto path = create_data_user_de_package_path(uuid_, userId, pkgname);
486 bool existing = (access(path.c_str(), F_OK) == 0);
487
488 if (prepare_app_dir(path, targetMode, uid) ||
489 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) ||
490 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) {
491 return error("Failed to prepare " + path);
492 }
493
494 // Consider restorecon over contents if label changed
495 if (restorecon_app_data_lazy(path, seInfo, uid, existing) ||
496 restorecon_app_data_lazy(path, "cache", seInfo, uid, existing) ||
497 restorecon_app_data_lazy(path, "code_cache", seInfo, uid, existing)) {
498 return error("Failed to restorecon " + path);
499 }
500
501 if (!prepare_app_profile_dir(packageName, appId, userId)) {
502 return error("Failed to prepare profiles for " + packageName);
503 }
504 }
505 return ok();
506 }
507
508
createAppData(const android::os::CreateAppDataArgs & args,android::os::CreateAppDataResult * _aidl_return)509 binder::Status InstalldNativeService::createAppData(
510 const android::os::CreateAppDataArgs& args,
511 android::os::CreateAppDataResult* _aidl_return) {
512 ENFORCE_UID(AID_SYSTEM);
513 std::lock_guard<std::recursive_mutex> lock(mLock);
514
515 int64_t ceDataInode = -1;
516 auto status = createAppData(args.uuid, args.packageName, args.userId, args.flags, args.appId,
517 args.seInfo, args.targetSdkVersion, &ceDataInode);
518 _aidl_return->ceDataInode = ceDataInode;
519 _aidl_return->exceptionCode = status.exceptionCode();
520 _aidl_return->exceptionMessage = status.exceptionMessage();
521 return ok();
522 }
523
createAppDataBatched(const std::vector<android::os::CreateAppDataArgs> & args,std::vector<android::os::CreateAppDataResult> * _aidl_return)524 binder::Status InstalldNativeService::createAppDataBatched(
525 const std::vector<android::os::CreateAppDataArgs>& args,
526 std::vector<android::os::CreateAppDataResult>* _aidl_return) {
527 ENFORCE_UID(AID_SYSTEM);
528 std::lock_guard<std::recursive_mutex> lock(mLock);
529
530 std::vector<android::os::CreateAppDataResult> results;
531 for (auto arg : args) {
532 android::os::CreateAppDataResult result;
533 createAppData(arg, &result);
534 results.push_back(result);
535 }
536 *_aidl_return = results;
537 return ok();
538 }
539
migrateAppData(const std::optional<std::string> & uuid,const std::string & packageName,int32_t userId,int32_t flags)540 binder::Status InstalldNativeService::migrateAppData(const std::optional<std::string>& uuid,
541 const std::string& packageName, int32_t userId, int32_t flags) {
542 ENFORCE_UID(AID_SYSTEM);
543 CHECK_ARGUMENT_UUID(uuid);
544 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
545 std::lock_guard<std::recursive_mutex> lock(mLock);
546
547 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
548 const char* pkgname = packageName.c_str();
549
550 // This method only exists to upgrade system apps that have requested
551 // forceDeviceEncrypted, so their default storage always lives in a
552 // consistent location. This only works on non-FBE devices, since we
553 // never want to risk exposing data on a device with real CE/DE storage.
554
555 auto ce_path = create_data_user_ce_package_path(uuid_, userId, pkgname);
556 auto de_path = create_data_user_de_package_path(uuid_, userId, pkgname);
557
558 // If neither directory is marked as default, assume CE is default
559 if (getxattr(ce_path.c_str(), kXattrDefault, nullptr, 0) == -1
560 && getxattr(de_path.c_str(), kXattrDefault, nullptr, 0) == -1) {
561 if (setxattr(ce_path.c_str(), kXattrDefault, nullptr, 0, 0) != 0) {
562 return error("Failed to mark default storage " + ce_path);
563 }
564 }
565
566 // Migrate default data location if needed
567 auto target = (flags & FLAG_STORAGE_DE) ? de_path : ce_path;
568 auto source = (flags & FLAG_STORAGE_DE) ? ce_path : de_path;
569
570 if (getxattr(target.c_str(), kXattrDefault, nullptr, 0) == -1) {
571 LOG(WARNING) << "Requested default storage " << target
572 << " is not active; migrating from " << source;
573 if (delete_dir_contents_and_dir(target) != 0) {
574 return error("Failed to delete " + target);
575 }
576 if (rename(source.c_str(), target.c_str()) != 0) {
577 return error("Failed to rename " + source + " to " + target);
578 }
579 }
580
581 return ok();
582 }
583
584
clearAppProfiles(const std::string & packageName,const std::string & profileName)585 binder::Status InstalldNativeService::clearAppProfiles(const std::string& packageName,
586 const std::string& profileName) {
587 ENFORCE_UID(AID_SYSTEM);
588 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
589 std::lock_guard<std::recursive_mutex> lock(mLock);
590
591 binder::Status res = ok();
592 if (!clear_primary_reference_profile(packageName, profileName)) {
593 res = error("Failed to clear reference profile for " + packageName);
594 }
595 if (!clear_primary_current_profiles(packageName, profileName)) {
596 res = error("Failed to clear current profiles for " + packageName);
597 }
598 return res;
599 }
600
clearAppData(const std::optional<std::string> & uuid,const std::string & packageName,int32_t userId,int32_t flags,int64_t ceDataInode)601 binder::Status InstalldNativeService::clearAppData(const std::optional<std::string>& uuid,
602 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) {
603 ENFORCE_UID(AID_SYSTEM);
604 CHECK_ARGUMENT_UUID(uuid);
605 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
606 std::lock_guard<std::recursive_mutex> lock(mLock);
607
608 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
609 const char* pkgname = packageName.c_str();
610
611 binder::Status res = ok();
612 if (flags & FLAG_STORAGE_CE) {
613 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode);
614 if (flags & FLAG_CLEAR_CACHE_ONLY) {
615 path = read_path_inode(path, "cache", kXattrInodeCache);
616 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) {
617 path = read_path_inode(path, "code_cache", kXattrInodeCodeCache);
618 }
619 if (access(path.c_str(), F_OK) == 0) {
620 if (delete_dir_contents(path) != 0) {
621 res = error("Failed to delete contents of " + path);
622 } else if ((flags & (FLAG_CLEAR_CACHE_ONLY | FLAG_CLEAR_CODE_CACHE_ONLY)) == 0) {
623 remove_path_xattr(path, kXattrInodeCache);
624 remove_path_xattr(path, kXattrInodeCodeCache);
625 }
626 }
627 }
628 if (flags & FLAG_STORAGE_DE) {
629 std::string suffix = "";
630 bool only_cache = false;
631 if (flags & FLAG_CLEAR_CACHE_ONLY) {
632 suffix = CACHE_DIR_POSTFIX;
633 only_cache = true;
634 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) {
635 suffix = CODE_CACHE_DIR_POSTFIX;
636 only_cache = true;
637 }
638
639 auto path = create_data_user_de_package_path(uuid_, userId, pkgname) + suffix;
640 if (access(path.c_str(), F_OK) == 0) {
641 if (delete_dir_contents(path) != 0) {
642 res = error("Failed to delete contents of " + path);
643 }
644 }
645 }
646 if (flags & FLAG_STORAGE_EXTERNAL) {
647 std::lock_guard<std::recursive_mutex> lock(mMountsLock);
648 for (const auto& n : mStorageMounts) {
649 auto extPath = n.second;
650
651 if (android::base::GetBoolProperty(kFuseProp, false)) {
652 std::regex re("^\\/mnt\\/pass_through\\/[0-9]+\\/emulated");
653 if (std::regex_match(extPath, re)) {
654 extPath += "/" + std::to_string(userId);
655 }
656 } else {
657 if (n.first.compare(0, 14, "/mnt/media_rw/") != 0) {
658 extPath += StringPrintf("/%d", userId);
659 } else if (userId != 0) {
660 // TODO: support devices mounted under secondary users
661 continue;
662 }
663 }
664
665 if (flags & FLAG_CLEAR_CACHE_ONLY) {
666 // Clear only cached data from shared storage
667 auto path = StringPrintf("%s/Android/data/%s/cache", extPath.c_str(), pkgname);
668 if (delete_dir_contents(path, true) != 0) {
669 res = error("Failed to delete contents of " + path);
670 }
671 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) {
672 // No code cache on shared storage
673 } else {
674 // Clear everything on shared storage
675 auto path = StringPrintf("%s/Android/data/%s", extPath.c_str(), pkgname);
676 if (delete_dir_contents(path, true) != 0) {
677 res = error("Failed to delete contents of " + path);
678 }
679 path = StringPrintf("%s/Android/media/%s", extPath.c_str(), pkgname);
680 if (delete_dir_contents(path, true) != 0) {
681 res = error("Failed to delete contents of " + path);
682 }
683 // Note that we explicitly don't delete OBBs - those are only removed on
684 // app uninstall.
685 }
686 }
687 }
688 return res;
689 }
690
destroy_app_reference_profile(const std::string & pkgname)691 static int destroy_app_reference_profile(const std::string& pkgname) {
692 return delete_dir_contents_and_dir(
693 create_primary_reference_profile_package_dir_path(pkgname),
694 /*ignore_if_missing*/ true);
695 }
696
destroy_app_current_profiles(const std::string & pkgname,userid_t userid)697 static int destroy_app_current_profiles(const std::string& pkgname, userid_t userid) {
698 return delete_dir_contents_and_dir(
699 create_primary_current_profile_package_dir_path(userid, pkgname),
700 /*ignore_if_missing*/ true);
701 }
702
destroyAppProfiles(const std::string & packageName)703 binder::Status InstalldNativeService::destroyAppProfiles(const std::string& packageName) {
704 ENFORCE_UID(AID_SYSTEM);
705 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
706 std::lock_guard<std::recursive_mutex> lock(mLock);
707
708 binder::Status res = ok();
709 std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr);
710 for (auto user : users) {
711 if (destroy_app_current_profiles(packageName, user) != 0) {
712 res = error("Failed to destroy current profiles for " + packageName);
713 }
714 }
715 if (destroy_app_reference_profile(packageName) != 0) {
716 res = error("Failed to destroy reference profile for " + packageName);
717 }
718 return res;
719 }
720
destroyAppData(const std::optional<std::string> & uuid,const std::string & packageName,int32_t userId,int32_t flags,int64_t ceDataInode)721 binder::Status InstalldNativeService::destroyAppData(const std::optional<std::string>& uuid,
722 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) {
723 ENFORCE_UID(AID_SYSTEM);
724 CHECK_ARGUMENT_UUID(uuid);
725 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
726 std::lock_guard<std::recursive_mutex> lock(mLock);
727
728 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
729 const char* pkgname = packageName.c_str();
730
731 binder::Status res = ok();
732 if (flags & FLAG_STORAGE_CE) {
733 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode);
734 if (delete_dir_contents_and_dir(path) != 0) {
735 res = error("Failed to delete " + path);
736 }
737 }
738 if (flags & FLAG_STORAGE_DE) {
739 auto path = create_data_user_de_package_path(uuid_, userId, pkgname);
740 if (delete_dir_contents_and_dir(path) != 0) {
741 res = error("Failed to delete " + path);
742 }
743 if ((flags & FLAG_CLEAR_APP_DATA_KEEP_ART_PROFILES) == 0) {
744 destroy_app_current_profiles(packageName, userId);
745 // TODO(calin): If the package is still installed by other users it's probably
746 // beneficial to keep the reference profile around.
747 // Verify if it's ok to do that.
748 destroy_app_reference_profile(packageName);
749 }
750 }
751 if (flags & FLAG_STORAGE_EXTERNAL) {
752 std::lock_guard<std::recursive_mutex> lock(mMountsLock);
753 for (const auto& n : mStorageMounts) {
754 auto extPath = n.second;
755
756 if (android::base::GetBoolProperty(kFuseProp, false)) {
757 std::regex re("^\\/mnt\\/pass_through\\/[0-9]+\\/emulated");
758 if (std::regex_match(extPath, re)) {
759 extPath += "/" + std::to_string(userId);
760 }
761 } else {
762 if (n.first.compare(0, 14, "/mnt/media_rw/") != 0) {
763 extPath += StringPrintf("/%d", userId);
764 } else if (userId != 0) {
765 // TODO: support devices mounted under secondary users
766 continue;
767 }
768 }
769
770 auto path = StringPrintf("%s/Android/data/%s", extPath.c_str(), pkgname);
771 if (delete_dir_contents_and_dir(path, true) != 0) {
772 res = error("Failed to delete contents of " + path);
773 }
774
775 path = StringPrintf("%s/Android/media/%s", extPath.c_str(), pkgname);
776 if (delete_dir_contents_and_dir(path, true) != 0) {
777 res = error("Failed to delete contents of " + path);
778 }
779 path = StringPrintf("%s/Android/obb/%s", extPath.c_str(), pkgname);
780 if (delete_dir_contents_and_dir(path, true) != 0) {
781 res = error("Failed to delete contents of " + path);
782 }
783 }
784 }
785 return res;
786 }
787
get_cache_gid(uid_t uid)788 static gid_t get_cache_gid(uid_t uid) {
789 int32_t gid = multiuser_get_cache_gid(multiuser_get_user_id(uid), multiuser_get_app_id(uid));
790 return (gid != -1) ? gid : uid;
791 }
792
fixupAppData(const std::optional<std::string> & uuid,int32_t flags)793 binder::Status InstalldNativeService::fixupAppData(const std::optional<std::string>& uuid,
794 int32_t flags) {
795 ENFORCE_UID(AID_SYSTEM);
796 CHECK_ARGUMENT_UUID(uuid);
797 std::lock_guard<std::recursive_mutex> lock(mLock);
798
799 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
800 for (auto user : get_known_users(uuid_)) {
801 ATRACE_BEGIN("fixup user");
802 FTS* fts;
803 FTSENT* p;
804 auto ce_path = create_data_user_ce_path(uuid_, user);
805 auto de_path = create_data_user_de_path(uuid_, user);
806 char *argv[] = { (char*) ce_path.c_str(), (char*) de_path.c_str(), nullptr };
807 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr))) {
808 return error("Failed to fts_open");
809 }
810 while ((p = fts_read(fts)) != nullptr) {
811 if (p->fts_info == FTS_D && p->fts_level == 1) {
812 // Track down inodes of cache directories
813 uint64_t raw = 0;
814 ino_t inode_cache = 0;
815 ino_t inode_code_cache = 0;
816 if (getxattr(p->fts_path, kXattrInodeCache, &raw, sizeof(raw)) == sizeof(raw)) {
817 inode_cache = raw;
818 }
819 if (getxattr(p->fts_path, kXattrInodeCodeCache, &raw, sizeof(raw)) == sizeof(raw)) {
820 inode_code_cache = raw;
821 }
822
823 // Figure out expected GID of each child
824 FTSENT* child = fts_children(fts, 0);
825 while (child != nullptr) {
826 if ((child->fts_statp->st_ino == inode_cache)
827 || (child->fts_statp->st_ino == inode_code_cache)
828 || !strcmp(child->fts_name, "cache")
829 || !strcmp(child->fts_name, "code_cache")) {
830 child->fts_number = get_cache_gid(p->fts_statp->st_uid);
831 } else {
832 child->fts_number = p->fts_statp->st_uid;
833 }
834 child = child->fts_link;
835 }
836 } else if (p->fts_level >= 2) {
837 if (p->fts_level > 2) {
838 // Inherit GID from parent once we're deeper into tree
839 p->fts_number = p->fts_parent->fts_number;
840 }
841
842 uid_t uid = p->fts_parent->fts_statp->st_uid;
843 gid_t cache_gid = get_cache_gid(uid);
844 gid_t expected = p->fts_number;
845 gid_t actual = p->fts_statp->st_gid;
846 if (actual == expected) {
847 #if FIXUP_DEBUG
848 LOG(DEBUG) << "Ignoring " << p->fts_path << " with expected GID " << expected;
849 #endif
850 if (!(flags & FLAG_FORCE)) {
851 fts_set(fts, p, FTS_SKIP);
852 }
853 } else if ((actual == uid) || (actual == cache_gid)) {
854 // Only consider fixing up when current GID belongs to app
855 if (p->fts_info != FTS_D) {
856 LOG(INFO) << "Fixing " << p->fts_path << " with unexpected GID " << actual
857 << " instead of " << expected;
858 }
859 switch (p->fts_info) {
860 case FTS_DP:
861 // If we're moving towards cache GID, we need to set S_ISGID
862 if (expected == cache_gid) {
863 if (chmod(p->fts_path, 02771) != 0) {
864 PLOG(WARNING) << "Failed to chmod " << p->fts_path;
865 }
866 }
867 [[fallthrough]]; // also set GID
868 case FTS_F:
869 if (chown(p->fts_path, -1, expected) != 0) {
870 PLOG(WARNING) << "Failed to chown " << p->fts_path;
871 }
872 break;
873 case FTS_SL:
874 case FTS_SLNONE:
875 if (lchown(p->fts_path, -1, expected) != 0) {
876 PLOG(WARNING) << "Failed to chown " << p->fts_path;
877 }
878 break;
879 }
880 } else {
881 // Ignore all other GID transitions, since they're kinda shady
882 LOG(WARNING) << "Ignoring " << p->fts_path << " with unexpected GID " << actual
883 << " instead of " << expected;
884 if (!(flags & FLAG_FORCE)) {
885 fts_set(fts, p, FTS_SKIP);
886 }
887 }
888 }
889 }
890 fts_close(fts);
891 ATRACE_END();
892 }
893 return ok();
894 }
895
copy_directory_recursive(const char * from,const char * to)896 static int32_t copy_directory_recursive(const char* from, const char* to) {
897 char *argv[] = {
898 (char*) kCpPath,
899 (char*) "-F", /* delete any existing destination file first (--remove-destination) */
900 (char*) "-p", /* preserve timestamps, ownership, and permissions */
901 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */
902 (char*) "-P", /* Do not follow symlinks [default] */
903 (char*) "-d", /* don't dereference symlinks */
904 (char*) from,
905 (char*) to
906 };
907
908 LOG(DEBUG) << "Copying " << from << " to " << to;
909 return logwrap_fork_execvp(ARRAY_SIZE(argv), argv, nullptr, false, LOG_ALOG, false, nullptr);
910 }
911
snapshotAppData(const std::optional<std::string> & volumeUuid,const std::string & packageName,int32_t user,int32_t snapshotId,int32_t storageFlags,int64_t * _aidl_return)912 binder::Status InstalldNativeService::snapshotAppData(
913 const std::optional<std::string>& volumeUuid,
914 const std::string& packageName, int32_t user, int32_t snapshotId,
915 int32_t storageFlags, int64_t* _aidl_return) {
916 ENFORCE_UID(AID_SYSTEM);
917 CHECK_ARGUMENT_UUID_IS_TEST_OR_NULL(volumeUuid);
918 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
919 std::lock_guard<std::recursive_mutex> lock(mLock);
920
921 const char* volume_uuid = volumeUuid ? volumeUuid->c_str() : nullptr;
922 const char* package_name = packageName.c_str();
923
924 binder::Status res = ok();
925 // Default result to 0, it will be populated with inode of ce data snapshot
926 // if FLAG_STORAGE_CE has been passed.
927 if (_aidl_return != nullptr) *_aidl_return = 0;
928
929 bool clear_ce_on_exit = false;
930 bool clear_de_on_exit = false;
931
932 auto deleter = [&clear_ce_on_exit, &clear_de_on_exit, &volume_uuid, &user, &package_name,
933 &snapshotId] {
934 if (clear_de_on_exit) {
935 auto to = create_data_misc_de_rollback_package_path(volume_uuid, user, snapshotId,
936 package_name);
937 if (delete_dir_contents(to.c_str(), 1, nullptr) != 0) {
938 LOG(WARNING) << "Failed to delete app data snapshot: " << to;
939 }
940 }
941
942 if (clear_ce_on_exit) {
943 auto to = create_data_misc_ce_rollback_package_path(volume_uuid, user, snapshotId,
944 package_name);
945 if (delete_dir_contents(to.c_str(), 1, nullptr) != 0) {
946 LOG(WARNING) << "Failed to delete app data snapshot: " << to;
947 }
948 }
949 };
950
951 auto scope_guard = android::base::make_scope_guard(deleter);
952
953 if (storageFlags & FLAG_STORAGE_DE) {
954 auto from = create_data_user_de_package_path(volume_uuid, user, package_name);
955 auto to = create_data_misc_de_rollback_path(volume_uuid, user, snapshotId);
956 auto rollback_package_path = create_data_misc_de_rollback_package_path(volume_uuid, user,
957 snapshotId, package_name);
958
959 int rc = create_dir_if_needed(to.c_str(), kRollbackFolderMode);
960 if (rc != 0) {
961 return error(rc, "Failed to create folder " + to);
962 }
963
964 rc = delete_dir_contents(rollback_package_path, true /* ignore_if_missing */);
965 if (rc != 0) {
966 return error(rc, "Failed clearing existing snapshot " + rollback_package_path);
967 }
968
969 // Check if we have data to copy.
970 if (access(from.c_str(), F_OK) == 0) {
971 rc = copy_directory_recursive(from.c_str(), to.c_str());
972 }
973 if (rc != 0) {
974 res = error(rc, "Failed copying " + from + " to " + to);
975 clear_de_on_exit = true;
976 return res;
977 }
978 }
979
980 // The app may not have any data at all, in which case it's OK to skip here.
981 auto from_ce = create_data_user_ce_package_path(volume_uuid, user, package_name);
982 if (access(from_ce.c_str(), F_OK) != 0) {
983 LOG(INFO) << "Missing source " << from_ce;
984 return ok();
985 }
986
987 // ce_data_inode is not needed when FLAG_CLEAR_CACHE_ONLY is set.
988 binder::Status clear_cache_result = clearAppData(volumeUuid, packageName, user,
989 storageFlags | FLAG_CLEAR_CACHE_ONLY, 0);
990 if (!clear_cache_result.isOk()) {
991 // It should be fine to continue snapshot if we for some reason failed
992 // to clear cache.
993 LOG(WARNING) << "Failed to clear cache of app " << packageName;
994 }
995
996 // ce_data_inode is not needed when FLAG_CLEAR_CODE_CACHE_ONLY is set.
997 binder::Status clear_code_cache_result = clearAppData(volumeUuid, packageName, user,
998 storageFlags | FLAG_CLEAR_CODE_CACHE_ONLY, 0);
999 if (!clear_code_cache_result.isOk()) {
1000 // It should be fine to continue snapshot if we for some reason failed
1001 // to clear code_cache.
1002 LOG(WARNING) << "Failed to clear code_cache of app " << packageName;
1003 }
1004
1005 if (storageFlags & FLAG_STORAGE_CE) {
1006 auto from = create_data_user_ce_package_path(volume_uuid, user, package_name);
1007 auto to = create_data_misc_ce_rollback_path(volume_uuid, user, snapshotId);
1008 auto rollback_package_path = create_data_misc_ce_rollback_package_path(volume_uuid, user,
1009 snapshotId, package_name);
1010
1011 int rc = create_dir_if_needed(to.c_str(), kRollbackFolderMode);
1012 if (rc != 0) {
1013 return error(rc, "Failed to create folder " + to);
1014 }
1015
1016 rc = delete_dir_contents(rollback_package_path, true /* ignore_if_missing */);
1017 if (rc != 0) {
1018 return error(rc, "Failed clearing existing snapshot " + rollback_package_path);
1019 }
1020
1021 rc = copy_directory_recursive(from.c_str(), to.c_str());
1022 if (rc != 0) {
1023 res = error(rc, "Failed copying " + from + " to " + to);
1024 clear_ce_on_exit = true;
1025 return res;
1026 }
1027 if (_aidl_return != nullptr) {
1028 auto ce_snapshot_path = create_data_misc_ce_rollback_package_path(volume_uuid, user,
1029 snapshotId, package_name);
1030 rc = get_path_inode(ce_snapshot_path, reinterpret_cast<ino_t*>(_aidl_return));
1031 if (rc != 0) {
1032 res = error(rc, "Failed to get_path_inode for " + ce_snapshot_path);
1033 clear_ce_on_exit = true;
1034 return res;
1035 }
1036 }
1037 }
1038
1039 return res;
1040 }
1041
restoreAppDataSnapshot(const std::optional<std::string> & volumeUuid,const std::string & packageName,const int32_t appId,const std::string & seInfo,const int32_t user,const int32_t snapshotId,int32_t storageFlags)1042 binder::Status InstalldNativeService::restoreAppDataSnapshot(
1043 const std::optional<std::string>& volumeUuid, const std::string& packageName,
1044 const int32_t appId, const std::string& seInfo, const int32_t user,
1045 const int32_t snapshotId, int32_t storageFlags) {
1046 ENFORCE_UID(AID_SYSTEM);
1047 CHECK_ARGUMENT_UUID_IS_TEST_OR_NULL(volumeUuid);
1048 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
1049 std::lock_guard<std::recursive_mutex> lock(mLock);
1050
1051 const char* volume_uuid = volumeUuid ? volumeUuid->c_str() : nullptr;
1052 const char* package_name = packageName.c_str();
1053
1054 auto from_ce = create_data_misc_ce_rollback_package_path(volume_uuid,
1055 user, snapshotId, package_name);
1056 auto from_de = create_data_misc_de_rollback_package_path(volume_uuid,
1057 user, snapshotId, package_name);
1058
1059 const bool needs_ce_rollback = (storageFlags & FLAG_STORAGE_CE) &&
1060 (access(from_ce.c_str(), F_OK) == 0);
1061 const bool needs_de_rollback = (storageFlags & FLAG_STORAGE_DE) &&
1062 (access(from_de.c_str(), F_OK) == 0);
1063
1064 if (!needs_ce_rollback && !needs_de_rollback) {
1065 return ok();
1066 }
1067
1068 // We know we're going to rollback one of the CE or DE data, so we clear
1069 // application data first. Note that it's possible that we're asked to
1070 // restore both CE & DE data but that one of the restores fail. Leaving the
1071 // app with no data in those cases is arguably better than leaving the app
1072 // with mismatched / stale data.
1073 LOG(INFO) << "Clearing app data for " << packageName << " to restore snapshot.";
1074 // It's fine to pass 0 as ceDataInode here, because restoreAppDataSnapshot
1075 // can only be called when user unlocks the phone, meaning that CE user data
1076 // is decrypted.
1077 binder::Status res = clearAppData(volumeUuid, packageName, user, storageFlags,
1078 0 /* ceDataInode */);
1079 if (!res.isOk()) {
1080 return res;
1081 }
1082
1083 if (needs_ce_rollback) {
1084 auto to_ce = create_data_user_ce_path(volume_uuid, user);
1085 int rc = copy_directory_recursive(from_ce.c_str(), to_ce.c_str());
1086 if (rc != 0) {
1087 res = error(rc, "Failed copying " + from_ce + " to " + to_ce);
1088 return res;
1089 }
1090 delete_dir_contents_and_dir(from_ce, true /* ignore_if_missing */);
1091 }
1092
1093 if (needs_de_rollback) {
1094 auto to_de = create_data_user_de_path(volume_uuid, user);
1095 int rc = copy_directory_recursive(from_de.c_str(), to_de.c_str());
1096 if (rc != 0) {
1097 if (needs_ce_rollback) {
1098 auto ce_data = create_data_user_ce_package_path(volume_uuid, user, package_name);
1099 LOG(WARNING) << "de_data rollback failed. Erasing rolled back ce_data " << ce_data;
1100 if (delete_dir_contents(ce_data.c_str(), 1, nullptr) != 0) {
1101 LOG(WARNING) << "Failed to delete rolled back ce_data " << ce_data;
1102 }
1103 }
1104 res = error(rc, "Failed copying " + from_de + " to " + to_de);
1105 return res;
1106 }
1107 delete_dir_contents_and_dir(from_de, true /* ignore_if_missing */);
1108 }
1109
1110 // Finally, restore the SELinux label on the app data.
1111 return restoreconAppData(volumeUuid, packageName, user, storageFlags, appId, seInfo);
1112 }
1113
destroyAppDataSnapshot(const std::optional<std::string> & volumeUuid,const std::string & packageName,const int32_t user,const int64_t ceSnapshotInode,const int32_t snapshotId,int32_t storageFlags)1114 binder::Status InstalldNativeService::destroyAppDataSnapshot(
1115 const std::optional<std::string> &volumeUuid, const std::string& packageName,
1116 const int32_t user, const int64_t ceSnapshotInode, const int32_t snapshotId,
1117 int32_t storageFlags) {
1118 ENFORCE_UID(AID_SYSTEM);
1119 CHECK_ARGUMENT_UUID_IS_TEST_OR_NULL(volumeUuid);
1120 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
1121 std::lock_guard<std::recursive_mutex> lock(mLock);
1122
1123 const char* volume_uuid = volumeUuid ? volumeUuid->c_str() : nullptr;
1124 const char* package_name = packageName.c_str();
1125
1126 if (storageFlags & FLAG_STORAGE_DE) {
1127 auto de_snapshot_path = create_data_misc_de_rollback_package_path(volume_uuid,
1128 user, snapshotId, package_name);
1129
1130 int res = delete_dir_contents_and_dir(de_snapshot_path, true /* ignore_if_missing */);
1131 if (res != 0) {
1132 return error(res, "Failed clearing snapshot " + de_snapshot_path);
1133 }
1134 }
1135
1136 if (storageFlags & FLAG_STORAGE_CE) {
1137 auto ce_snapshot_path = create_data_misc_ce_rollback_package_path(volume_uuid,
1138 user, snapshotId, package_name, ceSnapshotInode);
1139 int res = delete_dir_contents_and_dir(ce_snapshot_path, true /* ignore_if_missing */);
1140 if (res != 0) {
1141 return error(res, "Failed clearing snapshot " + ce_snapshot_path);
1142 }
1143 }
1144 return ok();
1145 }
1146
destroyCeSnapshotsNotSpecified(const std::optional<std::string> & volumeUuid,const int32_t user,const std::vector<int32_t> & retainSnapshotIds)1147 binder::Status InstalldNativeService::destroyCeSnapshotsNotSpecified(
1148 const std::optional<std::string> &volumeUuid, const int32_t user,
1149 const std::vector<int32_t>& retainSnapshotIds) {
1150 ENFORCE_UID(AID_SYSTEM);
1151 CHECK_ARGUMENT_UUID_IS_TEST_OR_NULL(volumeUuid);
1152 std::lock_guard<std::recursive_mutex> lock(mLock);
1153
1154 const char* volume_uuid = volumeUuid ? volumeUuid->c_str() : nullptr;
1155
1156 auto base_path = create_data_misc_ce_rollback_base_path(volume_uuid, user);
1157
1158 std::unique_ptr<DIR, decltype(&closedir)> dir(opendir(base_path.c_str()), closedir);
1159 if (!dir) {
1160 return error(-1, "Failed to open rollback base dir " + base_path);
1161 }
1162
1163 struct dirent* ent;
1164 while ((ent = readdir(dir.get()))) {
1165 if (ent->d_type != DT_DIR) {
1166 continue;
1167 }
1168
1169 uint snapshot_id;
1170 bool parse_ok = ParseUint(ent->d_name, &snapshot_id);
1171 if (parse_ok &&
1172 std::find(retainSnapshotIds.begin(), retainSnapshotIds.end(),
1173 snapshot_id) == retainSnapshotIds.end()) {
1174 auto rollback_path = create_data_misc_ce_rollback_path(
1175 volume_uuid, user, snapshot_id);
1176 int res = delete_dir_contents_and_dir(rollback_path, true /* ignore_if_missing */);
1177 if (res != 0) {
1178 return error(res, "Failed clearing snapshot " + rollback_path);
1179 }
1180 }
1181 }
1182 return ok();
1183 }
1184
moveCompleteApp(const std::optional<std::string> & fromUuid,const std::optional<std::string> & toUuid,const std::string & packageName,int32_t appId,const std::string & seInfo,int32_t targetSdkVersion,const std::string & fromCodePath)1185 binder::Status InstalldNativeService::moveCompleteApp(const std::optional<std::string>& fromUuid,
1186 const std::optional<std::string>& toUuid, const std::string& packageName,
1187 int32_t appId, const std::string& seInfo,
1188 int32_t targetSdkVersion, const std::string& fromCodePath) {
1189 ENFORCE_UID(AID_SYSTEM);
1190 CHECK_ARGUMENT_UUID(fromUuid);
1191 CHECK_ARGUMENT_UUID(toUuid);
1192 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
1193 std::lock_guard<std::recursive_mutex> lock(mLock);
1194
1195 const char* from_uuid = fromUuid ? fromUuid->c_str() : nullptr;
1196 const char* to_uuid = toUuid ? toUuid->c_str() : nullptr;
1197 const char* package_name = packageName.c_str();
1198
1199 binder::Status res = ok();
1200 std::vector<userid_t> users = get_known_users(from_uuid);
1201
1202 auto to_app_package_path_parent = create_data_app_path(to_uuid);
1203 auto to_app_package_path = StringPrintf("%s/%s", to_app_package_path_parent.c_str(),
1204 android::base::Basename(fromCodePath).c_str());
1205
1206 // Copy app
1207 {
1208 int rc = copy_directory_recursive(fromCodePath.c_str(), to_app_package_path_parent.c_str());
1209 if (rc != 0) {
1210 res = error(rc, "Failed copying " + fromCodePath + " to " + to_app_package_path);
1211 goto fail;
1212 }
1213
1214 if (selinux_android_restorecon(to_app_package_path.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) {
1215 res = error("Failed to restorecon " + to_app_package_path);
1216 goto fail;
1217 }
1218 }
1219
1220 // Copy private data for all known users
1221 for (auto user : users) {
1222
1223 // Data source may not exist for all users; that's okay
1224 auto from_ce = create_data_user_ce_package_path(from_uuid, user, package_name);
1225 if (access(from_ce.c_str(), F_OK) != 0) {
1226 LOG(INFO) << "Missing source " << from_ce;
1227 continue;
1228 }
1229
1230 if (!createAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, appId,
1231 seInfo, targetSdkVersion, nullptr).isOk()) {
1232 res = error("Failed to create package target");
1233 goto fail;
1234 }
1235
1236 {
1237 auto from = create_data_user_de_package_path(from_uuid, user, package_name);
1238 auto to = create_data_user_de_path(to_uuid, user);
1239
1240 int rc = copy_directory_recursive(from.c_str(), to.c_str());
1241 if (rc != 0) {
1242 res = error(rc, "Failed copying " + from + " to " + to);
1243 goto fail;
1244 }
1245 }
1246 {
1247 auto from = create_data_user_ce_package_path(from_uuid, user, package_name);
1248 auto to = create_data_user_ce_path(to_uuid, user);
1249
1250 int rc = copy_directory_recursive(from.c_str(), to.c_str());
1251 if (rc != 0) {
1252 res = error(rc, "Failed copying " + from + " to " + to);
1253 goto fail;
1254 }
1255 }
1256
1257 if (!restoreconAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE,
1258 appId, seInfo).isOk()) {
1259 res = error("Failed to restorecon");
1260 goto fail;
1261 }
1262 }
1263
1264 // We let the framework scan the new location and persist that before
1265 // deleting the data in the old location; this ordering ensures that
1266 // we can recover from things like battery pulls.
1267 return ok();
1268
1269 fail:
1270 // Nuke everything we might have already copied
1271 {
1272 if (delete_dir_contents(to_app_package_path.c_str(), 1, nullptr) != 0) {
1273 LOG(WARNING) << "Failed to rollback " << to_app_package_path;
1274 }
1275 }
1276 for (auto user : users) {
1277 {
1278 auto to = create_data_user_de_package_path(to_uuid, user, package_name);
1279 if (delete_dir_contents(to.c_str(), 1, nullptr) != 0) {
1280 LOG(WARNING) << "Failed to rollback " << to;
1281 }
1282 }
1283 {
1284 auto to = create_data_user_ce_package_path(to_uuid, user, package_name);
1285 if (delete_dir_contents(to.c_str(), 1, nullptr) != 0) {
1286 LOG(WARNING) << "Failed to rollback " << to;
1287 }
1288 }
1289 }
1290 return res;
1291 }
1292
createUserData(const std::optional<std::string> & uuid,int32_t userId,int32_t userSerial ATTRIBUTE_UNUSED,int32_t flags)1293 binder::Status InstalldNativeService::createUserData(const std::optional<std::string>& uuid,
1294 int32_t userId, int32_t userSerial ATTRIBUTE_UNUSED, int32_t flags) {
1295 ENFORCE_UID(AID_SYSTEM);
1296 CHECK_ARGUMENT_UUID(uuid);
1297 std::lock_guard<std::recursive_mutex> lock(mLock);
1298
1299 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
1300 if (flags & FLAG_STORAGE_DE) {
1301 if (uuid_ == nullptr) {
1302 if (ensure_config_user_dirs(userId) != 0) {
1303 return error(StringPrintf("Failed to ensure dirs for %d", userId));
1304 }
1305 }
1306 }
1307
1308 return ok();
1309 }
1310
destroyUserData(const std::optional<std::string> & uuid,int32_t userId,int32_t flags)1311 binder::Status InstalldNativeService::destroyUserData(const std::optional<std::string>& uuid,
1312 int32_t userId, int32_t flags) {
1313 ENFORCE_UID(AID_SYSTEM);
1314 CHECK_ARGUMENT_UUID(uuid);
1315 std::lock_guard<std::recursive_mutex> lock(mLock);
1316
1317 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
1318 binder::Status res = ok();
1319 if (flags & FLAG_STORAGE_DE) {
1320 auto path = create_data_user_de_path(uuid_, userId);
1321 if (delete_dir_contents_and_dir(path, true) != 0) {
1322 res = error("Failed to delete " + path);
1323 }
1324 if (uuid_ == nullptr) {
1325 path = create_data_misc_legacy_path(userId);
1326 if (delete_dir_contents_and_dir(path, true) != 0) {
1327 res = error("Failed to delete " + path);
1328 }
1329 path = create_primary_cur_profile_dir_path(userId);
1330 if (delete_dir_contents_and_dir(path, true) != 0) {
1331 res = error("Failed to delete " + path);
1332 }
1333 }
1334 }
1335 if (flags & FLAG_STORAGE_CE) {
1336 auto path = create_data_user_ce_path(uuid_, userId);
1337 if (delete_dir_contents_and_dir(path, true) != 0) {
1338 res = error("Failed to delete " + path);
1339 }
1340 path = findDataMediaPath(uuid, userId);
1341 if (delete_dir_contents_and_dir(path, true) != 0) {
1342 res = error("Failed to delete " + path);
1343 }
1344 }
1345 return res;
1346 }
1347
freeCache(const std::optional<std::string> & uuid,int64_t targetFreeBytes,int64_t cacheReservedBytes,int32_t flags)1348 binder::Status InstalldNativeService::freeCache(const std::optional<std::string>& uuid,
1349 int64_t targetFreeBytes, int64_t cacheReservedBytes, int32_t flags) {
1350 ENFORCE_UID(AID_SYSTEM);
1351 CHECK_ARGUMENT_UUID(uuid);
1352 std::lock_guard<std::recursive_mutex> lock(mLock);
1353
1354 auto uuidString = uuid.value_or("");
1355 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
1356 auto data_path = create_data_path(uuid_);
1357 auto noop = (flags & FLAG_FREE_CACHE_NOOP);
1358
1359 int64_t free = data_disk_free(data_path);
1360 if (free < 0) {
1361 return error("Failed to determine free space for " + data_path);
1362 }
1363
1364 int64_t cleared = 0;
1365 int64_t needed = targetFreeBytes - free;
1366 LOG(DEBUG) << "Device " << data_path << " has " << free << " free; requested "
1367 << targetFreeBytes << "; needed " << needed;
1368
1369 if (free >= targetFreeBytes) {
1370 return ok();
1371 }
1372
1373 if (flags & FLAG_FREE_CACHE_V2) {
1374 // This new cache strategy fairly removes files from UIDs by deleting
1375 // files from the UIDs which are most over their allocated quota
1376
1377 // 1. Create trackers for every known UID
1378 ATRACE_BEGIN("create");
1379 std::unordered_map<uid_t, std::shared_ptr<CacheTracker>> trackers;
1380 for (auto user : get_known_users(uuid_)) {
1381 FTS *fts;
1382 FTSENT *p;
1383 auto ce_path = create_data_user_ce_path(uuid_, user);
1384 auto de_path = create_data_user_de_path(uuid_, user);
1385 auto media_path = findDataMediaPath(uuid, user) + "/Android/data/";
1386 char *argv[] = { (char*) ce_path.c_str(), (char*) de_path.c_str(),
1387 (char*) media_path.c_str(), nullptr };
1388 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr))) {
1389 return error("Failed to fts_open");
1390 }
1391 while ((p = fts_read(fts)) != nullptr) {
1392 if (p->fts_info == FTS_D && p->fts_level == 1) {
1393 uid_t uid = p->fts_statp->st_uid;
1394 if (multiuser_get_app_id(uid) == AID_MEDIA_RW) {
1395 uid = (multiuser_get_app_id(p->fts_statp->st_gid) - AID_EXT_GID_START)
1396 + AID_APP_START;
1397 }
1398 auto search = trackers.find(uid);
1399 if (search != trackers.end()) {
1400 search->second->addDataPath(p->fts_path);
1401 } else {
1402 auto tracker = std::shared_ptr<CacheTracker>(new CacheTracker(
1403 multiuser_get_user_id(uid), multiuser_get_app_id(uid), uuidString));
1404 tracker->addDataPath(p->fts_path);
1405 {
1406 std::lock_guard<std::recursive_mutex> lock(mQuotasLock);
1407 tracker->cacheQuota = mCacheQuotas[uid];
1408 }
1409 if (tracker->cacheQuota == 0) {
1410 #if MEASURE_DEBUG
1411 LOG(WARNING) << "UID " << uid << " has no cache quota; assuming 64MB";
1412 #endif
1413 tracker->cacheQuota = 67108864;
1414 }
1415 trackers[uid] = tracker;
1416 }
1417 fts_set(fts, p, FTS_SKIP);
1418 }
1419 }
1420 fts_close(fts);
1421 }
1422 ATRACE_END();
1423
1424 // 2. Populate tracker stats and insert into priority queue
1425 ATRACE_BEGIN("populate");
1426 int64_t cacheTotal = 0;
1427 auto cmp = [](std::shared_ptr<CacheTracker> left, std::shared_ptr<CacheTracker> right) {
1428 return (left->getCacheRatio() < right->getCacheRatio());
1429 };
1430 std::priority_queue<std::shared_ptr<CacheTracker>,
1431 std::vector<std::shared_ptr<CacheTracker>>, decltype(cmp)> queue(cmp);
1432 for (const auto& it : trackers) {
1433 it.second->loadStats();
1434 queue.push(it.second);
1435 cacheTotal += it.second->cacheUsed;
1436 }
1437 ATRACE_END();
1438
1439 // 3. Bounce across the queue, freeing items from whichever tracker is
1440 // the most over their assigned quota
1441 ATRACE_BEGIN("bounce");
1442 std::shared_ptr<CacheTracker> active;
1443 while (active || !queue.empty()) {
1444 // Only look at apps under quota when explicitly requested
1445 if (active && (active->getCacheRatio() < 10000)
1446 && !(flags & FLAG_FREE_CACHE_V2_DEFY_QUOTA)) {
1447 LOG(DEBUG) << "Active ratio " << active->getCacheRatio()
1448 << " isn't over quota, and defy not requested";
1449 break;
1450 }
1451
1452 // Only keep clearing when we haven't pushed into reserved area
1453 if (cacheReservedBytes > 0 && cleared >= (cacheTotal - cacheReservedBytes)) {
1454 LOG(DEBUG) << "Refusing to clear cached data in reserved space";
1455 break;
1456 }
1457
1458 // Find the best tracker to work with; this might involve swapping
1459 // if the active tracker is no longer the most over quota
1460 bool nextBetter = active && !queue.empty()
1461 && active->getCacheRatio() < queue.top()->getCacheRatio();
1462 if (!active || nextBetter) {
1463 if (active) {
1464 // Current tracker still has items, so we'll consider it
1465 // again later once it bubbles up to surface
1466 queue.push(active);
1467 }
1468 active = queue.top(); queue.pop();
1469 active->ensureItems();
1470 continue;
1471 }
1472
1473 // If no items remain, go find another tracker
1474 if (active->items.empty()) {
1475 active = nullptr;
1476 continue;
1477 } else {
1478 auto item = active->items.back();
1479 active->items.pop_back();
1480
1481 LOG(DEBUG) << "Purging " << item->toString() << " from " << active->toString();
1482 if (!noop) {
1483 item->purge();
1484 }
1485 active->cacheUsed -= item->size;
1486 needed -= item->size;
1487 cleared += item->size;
1488 }
1489
1490 // Verify that we're actually done before bailing, since sneaky
1491 // apps might be using hardlinks
1492 if (needed <= 0) {
1493 free = data_disk_free(data_path);
1494 needed = targetFreeBytes - free;
1495 if (needed <= 0) {
1496 break;
1497 } else {
1498 LOG(WARNING) << "Expected to be done but still need " << needed;
1499 }
1500 }
1501 }
1502 ATRACE_END();
1503
1504 } else {
1505 return error("Legacy cache logic no longer supported");
1506 }
1507
1508 free = data_disk_free(data_path);
1509 if (free >= targetFreeBytes) {
1510 return ok();
1511 } else {
1512 return error(StringPrintf("Failed to free up %" PRId64 " on %s; final free space %" PRId64,
1513 targetFreeBytes, data_path.c_str(), free));
1514 }
1515 }
1516
rmdex(const std::string & codePath,const std::string & instructionSet)1517 binder::Status InstalldNativeService::rmdex(const std::string& codePath,
1518 const std::string& instructionSet) {
1519 ENFORCE_UID(AID_SYSTEM);
1520 CHECK_ARGUMENT_PATH(codePath);
1521 std::lock_guard<std::recursive_mutex> lock(mLock);
1522
1523 char dex_path[PKG_PATH_MAX];
1524
1525 const char* path = codePath.c_str();
1526 const char* instruction_set = instructionSet.c_str();
1527
1528 if (validate_apk_path(path) && validate_system_app_path(path)) {
1529 return error("Invalid path " + codePath);
1530 }
1531
1532 if (!create_cache_path(dex_path, path, instruction_set)) {
1533 return error("Failed to create cache path for " + codePath);
1534 }
1535
1536 ALOGV("unlink %s\n", dex_path);
1537 if (unlink(dex_path) < 0) {
1538 // It's ok if we don't have a dalvik cache path. Report error only when the path exists
1539 // but could not be unlinked.
1540 if (errno != ENOENT) {
1541 return error(StringPrintf("Failed to unlink %s", dex_path));
1542 }
1543 }
1544 return ok();
1545 }
1546
1547 struct stats {
1548 int64_t codeSize;
1549 int64_t dataSize;
1550 int64_t cacheSize;
1551 };
1552
1553 #if MEASURE_DEBUG
toString(std::vector<int64_t> values)1554 static std::string toString(std::vector<int64_t> values) {
1555 std::stringstream res;
1556 res << "[";
1557 for (size_t i = 0; i < values.size(); i++) {
1558 res << values[i];
1559 if (i < values.size() - 1) {
1560 res << ",";
1561 }
1562 }
1563 res << "]";
1564 return res.str();
1565 }
1566 #endif
1567
collectQuotaStats(const std::string & uuid,int32_t userId,int32_t appId,struct stats * stats,struct stats * extStats)1568 static void collectQuotaStats(const std::string& uuid, int32_t userId,
1569 int32_t appId, struct stats* stats, struct stats* extStats) {
1570 int64_t space;
1571 uid_t uid = multiuser_get_uid(userId, appId);
1572 if (stats != nullptr) {
1573 if ((space = GetOccupiedSpaceForUid(uuid, uid)) != -1) {
1574 stats->dataSize += space;
1575 }
1576
1577 int cacheGid = multiuser_get_cache_gid(userId, appId);
1578 if (cacheGid != -1) {
1579 if ((space = GetOccupiedSpaceForGid(uuid, cacheGid)) != -1) {
1580 stats->cacheSize += space;
1581 }
1582 }
1583
1584 int sharedGid = multiuser_get_shared_gid(0, appId);
1585 if (sharedGid != -1) {
1586 if ((space = GetOccupiedSpaceForGid(uuid, sharedGid)) != -1) {
1587 stats->codeSize += space;
1588 }
1589 }
1590 }
1591
1592 if (extStats != nullptr) {
1593 static const bool supportsSdCardFs = supports_sdcardfs();
1594 space = get_occupied_app_space_external(uuid, userId, appId);
1595
1596 if (space != -1) {
1597 extStats->dataSize += space;
1598 if (!supportsSdCardFs && stats != nullptr) {
1599 // On devices without sdcardfs, if internal and external are on
1600 // the same volume, a uid such as u0_a123 is used for
1601 // application dirs on both internal and external storage;
1602 // therefore, substract that amount from internal to make sure
1603 // we don't count it double.
1604 stats->dataSize -= space;
1605 }
1606 }
1607
1608 space = get_occupied_app_cache_space_external(uuid, userId, appId);
1609 if (space != -1) {
1610 extStats->dataSize += space; // cache counts for "data"
1611 extStats->cacheSize += space;
1612 if (!supportsSdCardFs && stats != nullptr) {
1613 // On devices without sdcardfs, if internal and external are on
1614 // the same volume, a uid such as u0_a123 is used for both
1615 // internal and external storage; therefore, substract that
1616 // amount from internal to make sure we don't count it double.
1617 stats->dataSize -= space;
1618 }
1619 }
1620
1621 if (!supportsSdCardFs && stats != nullptr) {
1622 // On devices without sdcardfs, the UID of OBBs on external storage
1623 // matches the regular app UID (eg u0_a123); therefore, to avoid
1624 // OBBs being include in stats->dataSize, compute the OBB size for
1625 // this app, and substract it from the size reported on internal
1626 // storage
1627 long obbProjectId = uid - AID_APP_START + PROJECT_ID_EXT_OBB_START;
1628 int64_t appObbSize = GetOccupiedSpaceForProjectId(uuid, obbProjectId);
1629 stats->dataSize -= appObbSize;
1630 }
1631 }
1632 }
1633
collectManualStats(const std::string & path,struct stats * stats)1634 static void collectManualStats(const std::string& path, struct stats* stats) {
1635 DIR *d;
1636 int dfd;
1637 struct dirent *de;
1638 struct stat s;
1639
1640 d = opendir(path.c_str());
1641 if (d == nullptr) {
1642 if (errno != ENOENT) {
1643 PLOG(WARNING) << "Failed to open " << path;
1644 }
1645 return;
1646 }
1647 dfd = dirfd(d);
1648 while ((de = readdir(d))) {
1649 const char *name = de->d_name;
1650
1651 int64_t size = 0;
1652 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
1653 size = s.st_blocks * 512;
1654 }
1655
1656 if (de->d_type == DT_DIR) {
1657 if (!strcmp(name, ".")) {
1658 // Don't recurse, but still count node size
1659 } else if (!strcmp(name, "..")) {
1660 // Don't recurse or count node size
1661 continue;
1662 } else {
1663 // Measure all children nodes
1664 size = 0;
1665 calculate_tree_size(StringPrintf("%s/%s", path.c_str(), name), &size);
1666 }
1667
1668 if (!strcmp(name, "cache") || !strcmp(name, "code_cache")) {
1669 stats->cacheSize += size;
1670 }
1671 }
1672
1673 // Legacy symlink isn't owned by app
1674 if (de->d_type == DT_LNK && !strcmp(name, "lib")) {
1675 continue;
1676 }
1677
1678 // Everything found inside is considered data
1679 stats->dataSize += size;
1680 }
1681 closedir(d);
1682 }
1683
collectManualStatsForUser(const std::string & path,struct stats * stats,bool exclude_apps=false)1684 static void collectManualStatsForUser(const std::string& path, struct stats* stats,
1685 bool exclude_apps = false) {
1686 DIR *d;
1687 int dfd;
1688 struct dirent *de;
1689 struct stat s;
1690
1691 d = opendir(path.c_str());
1692 if (d == nullptr) {
1693 if (errno != ENOENT) {
1694 PLOG(WARNING) << "Failed to open " << path;
1695 }
1696 return;
1697 }
1698 dfd = dirfd(d);
1699 while ((de = readdir(d))) {
1700 if (de->d_type == DT_DIR) {
1701 const char *name = de->d_name;
1702 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) != 0) {
1703 continue;
1704 }
1705 int32_t user_uid = multiuser_get_app_id(s.st_uid);
1706 if (!strcmp(name, ".") || !strcmp(name, "..")) {
1707 continue;
1708 } else if (exclude_apps && (user_uid >= AID_APP_START && user_uid <= AID_APP_END)) {
1709 continue;
1710 } else {
1711 collectManualStats(StringPrintf("%s/%s", path.c_str(), name), stats);
1712 }
1713 }
1714 }
1715 closedir(d);
1716 }
1717
collectManualExternalStatsForUser(const std::string & path,struct stats * stats)1718 static void collectManualExternalStatsForUser(const std::string& path, struct stats* stats) {
1719 FTS *fts;
1720 FTSENT *p;
1721 char *argv[] = { (char*) path.c_str(), nullptr };
1722 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr))) {
1723 PLOG(ERROR) << "Failed to fts_open " << path;
1724 return;
1725 }
1726 while ((p = fts_read(fts)) != nullptr) {
1727 p->fts_number = p->fts_parent->fts_number;
1728 switch (p->fts_info) {
1729 case FTS_D:
1730 if (p->fts_level == 4
1731 && !strcmp(p->fts_name, "cache")
1732 && !strcmp(p->fts_parent->fts_parent->fts_name, "data")
1733 && !strcmp(p->fts_parent->fts_parent->fts_parent->fts_name, "Android")) {
1734 p->fts_number = 1;
1735 }
1736 [[fallthrough]]; // to count the directory
1737 case FTS_DEFAULT:
1738 case FTS_F:
1739 case FTS_SL:
1740 case FTS_SLNONE:
1741 int64_t size = (p->fts_statp->st_blocks * 512);
1742 if (p->fts_number == 1) {
1743 stats->cacheSize += size;
1744 }
1745 stats->dataSize += size;
1746 break;
1747 }
1748 }
1749 fts_close(fts);
1750 }
ownsExternalStorage(int32_t appId)1751 static bool ownsExternalStorage(int32_t appId) {
1752 // Fetch external storage owner appid and check if it is the same as the
1753 // current appId whose size is calculated
1754 struct stat s;
1755 auto _picDir = StringPrintf("%s/Pictures", create_data_media_path(nullptr, 0).c_str());
1756 // check if the stat are present
1757 if (stat(_picDir.c_str(), &s) == 0) {
1758 // fetch the appId from the uid of the media app
1759 return ((int32_t)multiuser_get_app_id(s.st_uid) == appId);
1760 }
1761 return false;
1762 }
getAppSize(const std::optional<std::string> & uuid,const std::vector<std::string> & packageNames,int32_t userId,int32_t flags,int32_t appId,const std::vector<int64_t> & ceDataInodes,const std::vector<std::string> & codePaths,std::vector<int64_t> * _aidl_return)1763 binder::Status InstalldNativeService::getAppSize(const std::optional<std::string>& uuid,
1764 const std::vector<std::string>& packageNames, int32_t userId, int32_t flags,
1765 int32_t appId, const std::vector<int64_t>& ceDataInodes,
1766 const std::vector<std::string>& codePaths, std::vector<int64_t>* _aidl_return) {
1767 ENFORCE_UID(AID_SYSTEM);
1768 CHECK_ARGUMENT_UUID(uuid);
1769 for (const auto& packageName : packageNames) {
1770 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
1771 }
1772 for (const auto& codePath : codePaths) {
1773 CHECK_ARGUMENT_PATH(codePath);
1774 }
1775 // NOTE: Locking is relaxed on this method, since it's limited to
1776 // read-only measurements without mutation.
1777
1778 // When modifying this logic, always verify using tests:
1779 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetAppSize
1780
1781 #if MEASURE_DEBUG
1782 LOG(INFO) << "Measuring user " << userId << " app " << appId;
1783 #endif
1784
1785 // Here's a summary of the common storage locations across the platform,
1786 // and how they're each tagged:
1787 //
1788 // /data/app/com.example UID system
1789 // /data/app/com.example/oat UID system
1790 // /data/user/0/com.example UID u0_a10 GID u0_a10
1791 // /data/user/0/com.example/cache UID u0_a10 GID u0_a10_cache
1792 // /data/media/0/foo.txt UID u0_media_rw
1793 // /data/media/0/bar.jpg UID u0_media_rw GID u0_media_image
1794 // /data/media/0/Android/data/com.example UID u0_media_rw GID u0_a10_ext
1795 // /data/media/0/Android/data/com.example/cache UID u0_media_rw GID u0_a10_ext_cache
1796 // /data/media/obb/com.example UID system
1797
1798 struct stats stats;
1799 struct stats extStats;
1800 memset(&stats, 0, sizeof(stats));
1801 memset(&extStats, 0, sizeof(extStats));
1802
1803 auto uuidString = uuid.value_or("");
1804 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
1805
1806 if (!IsQuotaSupported(uuidString)) {
1807 flags &= ~FLAG_USE_QUOTA;
1808 }
1809
1810 ATRACE_BEGIN("obb");
1811 for (const auto& packageName : packageNames) {
1812 auto obbCodePath = create_data_media_package_path(uuid_, userId,
1813 "obb", packageName.c_str());
1814 calculate_tree_size(obbCodePath, &extStats.codeSize);
1815 }
1816 ATRACE_END();
1817 // Calculating the app size of the external storage owning app in a manual way, since
1818 // calculating it through quota apis also includes external media storage in the app storage
1819 // numbers
1820 if (flags & FLAG_USE_QUOTA && appId >= AID_APP_START && !ownsExternalStorage(appId)) {
1821 ATRACE_BEGIN("code");
1822 for (const auto& codePath : codePaths) {
1823 calculate_tree_size(codePath, &stats.codeSize, -1,
1824 multiuser_get_shared_gid(0, appId));
1825 }
1826 ATRACE_END();
1827
1828 ATRACE_BEGIN("quota");
1829 collectQuotaStats(uuidString, userId, appId, &stats, &extStats);
1830 ATRACE_END();
1831 } else {
1832 ATRACE_BEGIN("code");
1833 for (const auto& codePath : codePaths) {
1834 calculate_tree_size(codePath, &stats.codeSize);
1835 }
1836 ATRACE_END();
1837
1838 for (size_t i = 0; i < packageNames.size(); i++) {
1839 const char* pkgname = packageNames[i].c_str();
1840
1841 ATRACE_BEGIN("data");
1842 auto cePath = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInodes[i]);
1843 collectManualStats(cePath, &stats);
1844 auto dePath = create_data_user_de_package_path(uuid_, userId, pkgname);
1845 collectManualStats(dePath, &stats);
1846 ATRACE_END();
1847
1848 if (!uuid) {
1849 ATRACE_BEGIN("profiles");
1850 calculate_tree_size(
1851 create_primary_current_profile_package_dir_path(userId, pkgname),
1852 &stats.dataSize);
1853 calculate_tree_size(
1854 create_primary_reference_profile_package_dir_path(pkgname),
1855 &stats.codeSize);
1856 ATRACE_END();
1857 }
1858
1859 ATRACE_BEGIN("external");
1860 auto extPath = create_data_media_package_path(uuid_, userId, "data", pkgname);
1861 collectManualStats(extPath, &extStats);
1862 auto mediaPath = create_data_media_package_path(uuid_, userId, "media", pkgname);
1863 calculate_tree_size(mediaPath, &extStats.dataSize);
1864 ATRACE_END();
1865 }
1866
1867 if (!uuid) {
1868 ATRACE_BEGIN("dalvik");
1869 int32_t sharedGid = multiuser_get_shared_gid(0, appId);
1870 if (sharedGid != -1) {
1871 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize,
1872 sharedGid, -1);
1873 }
1874 ATRACE_END();
1875 }
1876 }
1877
1878 std::vector<int64_t> ret;
1879 ret.push_back(stats.codeSize);
1880 ret.push_back(stats.dataSize);
1881 ret.push_back(stats.cacheSize);
1882 ret.push_back(extStats.codeSize);
1883 ret.push_back(extStats.dataSize);
1884 ret.push_back(extStats.cacheSize);
1885 #if MEASURE_DEBUG
1886 LOG(DEBUG) << "Final result " << toString(ret);
1887 #endif
1888 *_aidl_return = ret;
1889 return ok();
1890 }
1891
1892 struct external_sizes {
1893 int64_t audioSize;
1894 int64_t videoSize;
1895 int64_t imageSize;
1896 int64_t totalSize; // excludes OBBs (Android/obb), but includes app data + cache
1897 int64_t obbSize;
1898 };
1899
1900 #define PER_USER_RANGE 100000
1901
getProjectIdForUser(int userId,long projectId)1902 static long getProjectIdForUser(int userId, long projectId) {
1903 return userId * PER_USER_RANGE + projectId;
1904 }
1905
getExternalSizesForUserWithQuota(const std::string & uuid,int32_t userId,const std::vector<int32_t> & appIds)1906 static external_sizes getExternalSizesForUserWithQuota(const std::string& uuid, int32_t userId, const std::vector<int32_t>& appIds) {
1907 struct external_sizes sizes = {};
1908 int64_t space;
1909
1910 if (supports_sdcardfs()) {
1911 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW);
1912 if ((space = GetOccupiedSpaceForUid(uuid, uid)) != -1) {
1913 sizes.totalSize = space;
1914 }
1915
1916 gid_t audioGid = multiuser_get_uid(userId, AID_MEDIA_AUDIO);
1917 if ((space = GetOccupiedSpaceForGid(uuid, audioGid)) != -1) {
1918 sizes.audioSize = space;
1919 }
1920
1921 gid_t videoGid = multiuser_get_uid(userId, AID_MEDIA_VIDEO);
1922 if ((space = GetOccupiedSpaceForGid(uuid, videoGid)) != -1) {
1923 sizes.videoSize = space;
1924 }
1925
1926 gid_t imageGid = multiuser_get_uid(userId, AID_MEDIA_IMAGE);
1927 if ((space = GetOccupiedSpaceForGid(uuid, imageGid)) != -1) {
1928 sizes.imageSize = space;
1929 }
1930
1931 if ((space = GetOccupiedSpaceForGid(uuid, AID_MEDIA_OBB)) != -1) {
1932 sizes.obbSize = space;
1933 }
1934 } else {
1935 int64_t totalSize = 0;
1936 long defaultProjectId = getProjectIdForUser(userId, PROJECT_ID_EXT_DEFAULT);
1937 if ((space = GetOccupiedSpaceForProjectId(uuid, defaultProjectId)) != -1) {
1938 // This is all files that are not audio/video/images, excluding
1939 // OBBs and app-private data
1940 totalSize += space;
1941 }
1942
1943 long audioProjectId = getProjectIdForUser(userId, PROJECT_ID_EXT_MEDIA_AUDIO);
1944 if ((space = GetOccupiedSpaceForProjectId(uuid, audioProjectId)) != -1) {
1945 sizes.audioSize = space;
1946 totalSize += space;
1947 }
1948
1949 long videoProjectId = getProjectIdForUser(userId, PROJECT_ID_EXT_MEDIA_VIDEO);
1950 if ((space = GetOccupiedSpaceForProjectId(uuid, videoProjectId)) != -1) {
1951 sizes.videoSize = space;
1952 totalSize += space;
1953 }
1954
1955 long imageProjectId = getProjectIdForUser(userId, PROJECT_ID_EXT_MEDIA_IMAGE);
1956 if ((space = GetOccupiedSpaceForProjectId(uuid, imageProjectId)) != -1) {
1957 sizes.imageSize = space;
1958 totalSize += space;
1959 }
1960
1961 int64_t totalAppDataSize = 0;
1962 int64_t totalAppCacheSize = 0;
1963 int64_t totalAppObbSize = 0;
1964 for (auto appId : appIds) {
1965 if (appId >= AID_APP_START) {
1966 // App data
1967 uid_t uid = multiuser_get_uid(userId, appId);
1968 long projectId = uid - AID_APP_START + PROJECT_ID_EXT_DATA_START;
1969 totalAppDataSize += GetOccupiedSpaceForProjectId(uuid, projectId);
1970
1971 // App cache
1972 long cacheProjectId = uid - AID_APP_START + PROJECT_ID_EXT_CACHE_START;
1973 totalAppCacheSize += GetOccupiedSpaceForProjectId(uuid, cacheProjectId);
1974
1975 // App OBBs
1976 long obbProjectId = uid - AID_APP_START + PROJECT_ID_EXT_OBB_START;
1977 totalAppObbSize += GetOccupiedSpaceForProjectId(uuid, obbProjectId);
1978 }
1979 }
1980 // Total size should include app data + cache
1981 totalSize += totalAppDataSize;
1982 totalSize += totalAppCacheSize;
1983 sizes.totalSize = totalSize;
1984
1985 // Only OBB is separate
1986 sizes.obbSize = totalAppObbSize;
1987 }
1988
1989 return sizes;
1990 }
1991
getUserSize(const std::optional<std::string> & uuid,int32_t userId,int32_t flags,const std::vector<int32_t> & appIds,std::vector<int64_t> * _aidl_return)1992 binder::Status InstalldNativeService::getUserSize(const std::optional<std::string>& uuid,
1993 int32_t userId, int32_t flags, const std::vector<int32_t>& appIds,
1994 std::vector<int64_t>* _aidl_return) {
1995 ENFORCE_UID(AID_SYSTEM);
1996 CHECK_ARGUMENT_UUID(uuid);
1997 // NOTE: Locking is relaxed on this method, since it's limited to
1998 // read-only measurements without mutation.
1999
2000 // When modifying this logic, always verify using tests:
2001 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetUserSize
2002
2003 #if MEASURE_DEBUG
2004 LOG(INFO) << "Measuring user " << userId;
2005 #endif
2006
2007 struct stats stats;
2008 struct stats extStats;
2009 memset(&stats, 0, sizeof(stats));
2010 memset(&extStats, 0, sizeof(extStats));
2011
2012 auto uuidString = uuid.value_or("");
2013 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
2014
2015 if (!IsQuotaSupported(uuidString)) {
2016 flags &= ~FLAG_USE_QUOTA;
2017 }
2018
2019 if (flags & FLAG_USE_QUOTA) {
2020 ATRACE_BEGIN("code");
2021 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize, -1, -1, true);
2022 ATRACE_END();
2023
2024 ATRACE_BEGIN("data");
2025 auto cePath = create_data_user_ce_path(uuid_, userId);
2026 collectManualStatsForUser(cePath, &stats, true);
2027 auto dePath = create_data_user_de_path(uuid_, userId);
2028 collectManualStatsForUser(dePath, &stats, true);
2029 ATRACE_END();
2030
2031 if (!uuid) {
2032 ATRACE_BEGIN("profile");
2033 auto userProfilePath = create_primary_cur_profile_dir_path(userId);
2034 calculate_tree_size(userProfilePath, &stats.dataSize, -1, -1, true);
2035 auto refProfilePath = create_primary_ref_profile_dir_path();
2036 calculate_tree_size(refProfilePath, &stats.codeSize, -1, -1, true);
2037 ATRACE_END();
2038 }
2039
2040 ATRACE_BEGIN("external");
2041 auto sizes = getExternalSizesForUserWithQuota(uuidString, userId, appIds);
2042 extStats.dataSize += sizes.totalSize;
2043 extStats.codeSize += sizes.obbSize;
2044 ATRACE_END();
2045
2046 if (!uuid) {
2047 ATRACE_BEGIN("dalvik");
2048 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize,
2049 -1, -1, true);
2050 calculate_tree_size(create_primary_cur_profile_dir_path(userId), &stats.dataSize,
2051 -1, -1, true);
2052 ATRACE_END();
2053 }
2054 ATRACE_BEGIN("quota");
2055 int64_t dataSize = extStats.dataSize;
2056 for (auto appId : appIds) {
2057 if (appId >= AID_APP_START) {
2058 collectQuotaStats(uuidString, userId, appId, &stats, &extStats);
2059 #if MEASURE_DEBUG
2060 // Sleep to make sure we don't lose logs
2061 usleep(1);
2062 #endif
2063 }
2064 }
2065 extStats.dataSize = dataSize;
2066 ATRACE_END();
2067 } else {
2068 ATRACE_BEGIN("obb");
2069 auto obbPath = create_data_path(uuid_) + "/media/obb";
2070 calculate_tree_size(obbPath, &extStats.codeSize);
2071 ATRACE_END();
2072
2073 ATRACE_BEGIN("code");
2074 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize);
2075 ATRACE_END();
2076
2077 ATRACE_BEGIN("data");
2078 auto cePath = create_data_user_ce_path(uuid_, userId);
2079 collectManualStatsForUser(cePath, &stats);
2080 auto dePath = create_data_user_de_path(uuid_, userId);
2081 collectManualStatsForUser(dePath, &stats);
2082 ATRACE_END();
2083
2084 if (!uuid) {
2085 ATRACE_BEGIN("profile");
2086 auto userProfilePath = create_primary_cur_profile_dir_path(userId);
2087 calculate_tree_size(userProfilePath, &stats.dataSize);
2088 auto refProfilePath = create_primary_ref_profile_dir_path();
2089 calculate_tree_size(refProfilePath, &stats.codeSize);
2090 ATRACE_END();
2091 }
2092
2093 ATRACE_BEGIN("external");
2094 auto dataMediaPath = create_data_media_path(uuid_, userId);
2095 collectManualExternalStatsForUser(dataMediaPath, &extStats);
2096 #if MEASURE_DEBUG
2097 LOG(DEBUG) << "Measured external data " << extStats.dataSize << " cache "
2098 << extStats.cacheSize;
2099 #endif
2100 ATRACE_END();
2101
2102 if (!uuid) {
2103 ATRACE_BEGIN("dalvik");
2104 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize);
2105 calculate_tree_size(create_primary_cur_profile_dir_path(userId), &stats.dataSize);
2106 ATRACE_END();
2107 }
2108 }
2109
2110 std::vector<int64_t> ret;
2111 ret.push_back(stats.codeSize);
2112 ret.push_back(stats.dataSize);
2113 ret.push_back(stats.cacheSize);
2114 ret.push_back(extStats.codeSize);
2115 ret.push_back(extStats.dataSize);
2116 ret.push_back(extStats.cacheSize);
2117 #if MEASURE_DEBUG
2118 LOG(DEBUG) << "Final result " << toString(ret);
2119 #endif
2120 *_aidl_return = ret;
2121 return ok();
2122 }
2123
getExternalSize(const std::optional<std::string> & uuid,int32_t userId,int32_t flags,const std::vector<int32_t> & appIds,std::vector<int64_t> * _aidl_return)2124 binder::Status InstalldNativeService::getExternalSize(const std::optional<std::string>& uuid,
2125 int32_t userId, int32_t flags, const std::vector<int32_t>& appIds,
2126 std::vector<int64_t>* _aidl_return) {
2127 ENFORCE_UID(AID_SYSTEM);
2128 CHECK_ARGUMENT_UUID(uuid);
2129 // NOTE: Locking is relaxed on this method, since it's limited to
2130 // read-only measurements without mutation.
2131
2132 // When modifying this logic, always verify using tests:
2133 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetExternalSize
2134
2135 #if MEASURE_DEBUG
2136 LOG(INFO) << "Measuring external " << userId;
2137 #endif
2138
2139 auto uuidString = uuid.value_or("");
2140 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
2141
2142 int64_t totalSize = 0;
2143 int64_t audioSize = 0;
2144 int64_t videoSize = 0;
2145 int64_t imageSize = 0;
2146 int64_t appSize = 0;
2147 int64_t obbSize = 0;
2148
2149 if (!IsQuotaSupported(uuidString)) {
2150 flags &= ~FLAG_USE_QUOTA;
2151 }
2152
2153 if (flags & FLAG_USE_QUOTA) {
2154 ATRACE_BEGIN("quota");
2155 auto sizes = getExternalSizesForUserWithQuota(uuidString, userId, appIds);
2156 totalSize = sizes.totalSize;
2157 audioSize = sizes.audioSize;
2158 videoSize = sizes.videoSize;
2159 imageSize = sizes.imageSize;
2160 obbSize = sizes.obbSize;
2161 ATRACE_END();
2162
2163 ATRACE_BEGIN("apps");
2164 struct stats extStats;
2165 memset(&extStats, 0, sizeof(extStats));
2166 for (auto appId : appIds) {
2167 if (appId >= AID_APP_START) {
2168 collectQuotaStats(uuidString, userId, appId, nullptr, &extStats);
2169 }
2170 }
2171 appSize = extStats.dataSize;
2172 ATRACE_END();
2173 } else {
2174 ATRACE_BEGIN("manual");
2175 FTS *fts;
2176 FTSENT *p;
2177 auto path = create_data_media_path(uuid_, userId);
2178 char *argv[] = { (char*) path.c_str(), nullptr };
2179 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr))) {
2180 return error("Failed to fts_open " + path);
2181 }
2182 while ((p = fts_read(fts)) != nullptr) {
2183 char* ext;
2184 int64_t size = (p->fts_statp->st_blocks * 512);
2185 switch (p->fts_info) {
2186 case FTS_F:
2187 // Only categorize files not belonging to apps
2188 if (p->fts_parent->fts_number == 0) {
2189 ext = strrchr(p->fts_name, '.');
2190 if (ext != nullptr) {
2191 switch (MatchExtension(++ext)) {
2192 case AID_MEDIA_AUDIO: audioSize += size; break;
2193 case AID_MEDIA_VIDEO: videoSize += size; break;
2194 case AID_MEDIA_IMAGE: imageSize += size; break;
2195 }
2196 }
2197 }
2198 [[fallthrough]]; // always count against total
2199 case FTS_D:
2200 // Ignore data belonging to specific apps
2201 p->fts_number = p->fts_parent->fts_number;
2202 if (p->fts_level == 1 && !strcmp(p->fts_name, "Android")) {
2203 p->fts_number = 1;
2204 }
2205 [[fallthrough]]; // always count against total
2206 case FTS_DEFAULT:
2207 case FTS_SL:
2208 case FTS_SLNONE:
2209 if (p->fts_parent->fts_number == 1) {
2210 appSize += size;
2211 }
2212 totalSize += size;
2213 break;
2214 }
2215 }
2216 fts_close(fts);
2217 ATRACE_END();
2218
2219 ATRACE_BEGIN("obb");
2220 auto obbPath = StringPrintf("%s/Android/obb",
2221 create_data_media_path(uuid_, userId).c_str());
2222 calculate_tree_size(obbPath, &obbSize);
2223 ATRACE_END();
2224 }
2225
2226 std::vector<int64_t> ret;
2227 ret.push_back(totalSize);
2228 ret.push_back(audioSize);
2229 ret.push_back(videoSize);
2230 ret.push_back(imageSize);
2231 ret.push_back(appSize);
2232 ret.push_back(obbSize);
2233 #if MEASURE_DEBUG
2234 LOG(DEBUG) << "Final result " << toString(ret);
2235 #endif
2236 *_aidl_return = ret;
2237 return ok();
2238 }
2239
getAppCrates(const std::optional<std::string> & uuid,const std::vector<std::string> & packageNames,int32_t userId,std::optional<std::vector<std::optional<CrateMetadata>>> * _aidl_return)2240 binder::Status InstalldNativeService::getAppCrates(
2241 const std::optional<std::string>& uuid,
2242 const std::vector<std::string>& packageNames, int32_t userId,
2243 std::optional<std::vector<std::optional<CrateMetadata>>>* _aidl_return) {
2244 ENFORCE_UID(AID_SYSTEM);
2245 CHECK_ARGUMENT_UUID(uuid);
2246 for (const auto& packageName : packageNames) {
2247 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
2248 }
2249 #ifdef ENABLE_STORAGE_CRATES
2250 std::lock_guard<std::recursive_mutex> lock(mLock);
2251
2252 auto retVector = std::vector<std::optional<CrateMetadata>>();
2253 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
2254
2255 std::function<void(CratedFolder, CrateMetadata&&)> onCreateCrate =
2256 [&](CratedFolder cratedFolder, CrateMetadata&& crateMetadata) -> void {
2257 if (cratedFolder == nullptr) {
2258 return;
2259 }
2260 retVector.push_back(std::move(crateMetadata));
2261 };
2262
2263 for (const auto& packageName : packageNames) {
2264 #if CRATE_DEBUG
2265 LOG(DEBUG) << "packageName = " << packageName;
2266 #endif
2267 auto crateManager = std::make_unique<CrateManager>(uuid_, userId, packageName);
2268 crateManager->traverseAllCrates(onCreateCrate);
2269 }
2270
2271 #if CRATE_DEBUG
2272 LOG(WARNING) << "retVector.size() =" << retVector.size();
2273 for (auto& item : retVector) {
2274 CrateManager::dump(*item);
2275 }
2276 #endif
2277
2278 *_aidl_return = std::move(retVector);
2279 #else // ENABLE_STORAGE_CRATES
2280 _aidl_return->reset();
2281
2282 /* prevent compile warning fail */
2283 if (userId < 0) {
2284 return error();
2285 }
2286 #endif // ENABLE_STORAGE_CRATES
2287 return ok();
2288 }
2289
getUserCrates(const std::optional<std::string> & uuid,int32_t userId,std::optional<std::vector<std::optional<CrateMetadata>>> * _aidl_return)2290 binder::Status InstalldNativeService::getUserCrates(
2291 const std::optional<std::string>& uuid, int32_t userId,
2292 std::optional<std::vector<std::optional<CrateMetadata>>>* _aidl_return) {
2293 ENFORCE_UID(AID_SYSTEM);
2294 CHECK_ARGUMENT_UUID(uuid);
2295 #ifdef ENABLE_STORAGE_CRATES
2296 std::lock_guard<std::recursive_mutex> lock(mLock);
2297
2298 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
2299 auto retVector = std::vector<std::optional<CrateMetadata>>();
2300
2301 std::function<void(CratedFolder, CrateMetadata&&)> onCreateCrate =
2302 [&](CratedFolder cratedFolder, CrateMetadata&& crateMetadata) -> void {
2303 if (cratedFolder == nullptr) {
2304 return;
2305 }
2306 retVector.push_back(std::move(crateMetadata));
2307 };
2308
2309 std::function<void(FTSENT*)> onHandingPackage = [&](FTSENT* packageDir) -> void {
2310 auto crateManager = std::make_unique<CrateManager>(uuid_, userId, packageDir->fts_name);
2311 crateManager->traverseAllCrates(onCreateCrate);
2312 };
2313 CrateManager::traverseAllPackagesForUser(uuid, userId, onHandingPackage);
2314
2315 #if CRATE_DEBUG
2316 LOG(DEBUG) << "retVector.size() =" << retVector.size();
2317 for (auto& item : retVector) {
2318 CrateManager::dump(*item);
2319 }
2320 #endif
2321
2322 *_aidl_return = std::move(retVector);
2323 #else // ENABLE_STORAGE_CRATES
2324 _aidl_return->reset();
2325
2326 /* prevent compile warning fail */
2327 if (userId < 0) {
2328 return error();
2329 }
2330 #endif // ENABLE_STORAGE_CRATES
2331 return ok();
2332 }
2333
setAppQuota(const std::optional<std::string> & uuid,int32_t userId,int32_t appId,int64_t cacheQuota)2334 binder::Status InstalldNativeService::setAppQuota(const std::optional<std::string>& uuid,
2335 int32_t userId, int32_t appId, int64_t cacheQuota) {
2336 ENFORCE_UID(AID_SYSTEM);
2337 CHECK_ARGUMENT_UUID(uuid);
2338 std::lock_guard<std::recursive_mutex> lock(mQuotasLock);
2339
2340 int32_t uid = multiuser_get_uid(userId, appId);
2341 mCacheQuotas[uid] = cacheQuota;
2342
2343 return ok();
2344 }
2345
2346 // Dumps the contents of a profile file, using pkgname's dex files for pretty
2347 // printing the result.
dumpProfiles(int32_t uid,const std::string & packageName,const std::string & profileName,const std::string & codePath,bool * _aidl_return)2348 binder::Status InstalldNativeService::dumpProfiles(int32_t uid, const std::string& packageName,
2349 const std::string& profileName, const std::string& codePath, bool* _aidl_return) {
2350 ENFORCE_UID(AID_SYSTEM);
2351 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
2352 CHECK_ARGUMENT_PATH(codePath);
2353 std::lock_guard<std::recursive_mutex> lock(mLock);
2354
2355 *_aidl_return = dump_profiles(uid, packageName, profileName, codePath);
2356 return ok();
2357 }
2358
2359 // Copy the contents of a system profile over the data profile.
copySystemProfile(const std::string & systemProfile,int32_t packageUid,const std::string & packageName,const std::string & profileName,bool * _aidl_return)2360 binder::Status InstalldNativeService::copySystemProfile(const std::string& systemProfile,
2361 int32_t packageUid, const std::string& packageName, const std::string& profileName,
2362 bool* _aidl_return) {
2363 ENFORCE_UID(AID_SYSTEM);
2364 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
2365 std::lock_guard<std::recursive_mutex> lock(mLock);
2366 *_aidl_return = copy_system_profile(systemProfile, packageUid, packageName, profileName);
2367 return ok();
2368 }
2369
2370 // TODO: Consider returning error codes.
mergeProfiles(int32_t uid,const std::string & packageName,const std::string & profileName,int * _aidl_return)2371 binder::Status InstalldNativeService::mergeProfiles(int32_t uid, const std::string& packageName,
2372 const std::string& profileName, int* _aidl_return) {
2373 ENFORCE_UID(AID_SYSTEM);
2374 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
2375 std::lock_guard<std::recursive_mutex> lock(mLock);
2376
2377 *_aidl_return = analyze_primary_profiles(uid, packageName, profileName);
2378 return ok();
2379 }
2380
createProfileSnapshot(int32_t appId,const std::string & packageName,const std::string & profileName,const std::string & classpath,bool * _aidl_return)2381 binder::Status InstalldNativeService::createProfileSnapshot(int32_t appId,
2382 const std::string& packageName, const std::string& profileName,
2383 const std::string& classpath, bool* _aidl_return) {
2384 ENFORCE_UID(AID_SYSTEM);
2385 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
2386 std::lock_guard<std::recursive_mutex> lock(mLock);
2387
2388 *_aidl_return = create_profile_snapshot(appId, packageName, profileName, classpath);
2389 return ok();
2390 }
2391
destroyProfileSnapshot(const std::string & packageName,const std::string & profileName)2392 binder::Status InstalldNativeService::destroyProfileSnapshot(const std::string& packageName,
2393 const std::string& profileName) {
2394 ENFORCE_UID(AID_SYSTEM);
2395 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
2396 std::lock_guard<std::recursive_mutex> lock(mLock);
2397
2398 std::string snapshot = create_snapshot_profile_path(packageName, profileName);
2399 if ((unlink(snapshot.c_str()) != 0) && (errno != ENOENT)) {
2400 return error("Failed to destroy profile snapshot for " + packageName + ":" + profileName);
2401 }
2402 return ok();
2403 }
2404
getCStr(const std::optional<std::string> & data,const char * default_value=nullptr)2405 static const char* getCStr(const std::optional<std::string>& data,
2406 const char* default_value = nullptr) {
2407 return data ? data->c_str() : default_value;
2408 }
dexopt(const std::string & apkPath,int32_t uid,const std::optional<std::string> & packageName,const std::string & instructionSet,int32_t dexoptNeeded,const std::optional<std::string> & outputPath,int32_t dexFlags,const std::string & compilerFilter,const std::optional<std::string> & uuid,const std::optional<std::string> & classLoaderContext,const std::optional<std::string> & seInfo,bool downgrade,int32_t targetSdkVersion,const std::optional<std::string> & profileName,const std::optional<std::string> & dexMetadataPath,const std::optional<std::string> & compilationReason)2409 binder::Status InstalldNativeService::dexopt(const std::string& apkPath, int32_t uid,
2410 const std::optional<std::string>& packageName, const std::string& instructionSet,
2411 int32_t dexoptNeeded, const std::optional<std::string>& outputPath, int32_t dexFlags,
2412 const std::string& compilerFilter, const std::optional<std::string>& uuid,
2413 const std::optional<std::string>& classLoaderContext,
2414 const std::optional<std::string>& seInfo, bool downgrade, int32_t targetSdkVersion,
2415 const std::optional<std::string>& profileName,
2416 const std::optional<std::string>& dexMetadataPath,
2417 const std::optional<std::string>& compilationReason) {
2418 ENFORCE_UID(AID_SYSTEM);
2419 CHECK_ARGUMENT_UUID(uuid);
2420 CHECK_ARGUMENT_PATH(apkPath);
2421 if (packageName && *packageName != "*") {
2422 CHECK_ARGUMENT_PACKAGE_NAME(*packageName);
2423 }
2424 CHECK_ARGUMENT_PATH(outputPath);
2425 CHECK_ARGUMENT_PATH(dexMetadataPath);
2426 std::lock_guard<std::recursive_mutex> lock(mLock);
2427
2428 const char* oat_dir = getCStr(outputPath);
2429 const char* instruction_set = instructionSet.c_str();
2430 if (oat_dir != nullptr && !createOatDir(oat_dir, instruction_set).isOk()) {
2431 // Can't create oat dir - let dexopt use cache dir.
2432 oat_dir = nullptr;
2433 }
2434
2435 const char* apk_path = apkPath.c_str();
2436 const char* pkgname = getCStr(packageName, "*");
2437 const char* compiler_filter = compilerFilter.c_str();
2438 const char* volume_uuid = getCStr(uuid);
2439 const char* class_loader_context = getCStr(classLoaderContext);
2440 const char* se_info = getCStr(seInfo);
2441 const char* profile_name = getCStr(profileName);
2442 const char* dm_path = getCStr(dexMetadataPath);
2443 const char* compilation_reason = getCStr(compilationReason);
2444 std::string error_msg;
2445 int res = android::installd::dexopt(apk_path, uid, pkgname, instruction_set, dexoptNeeded,
2446 oat_dir, dexFlags, compiler_filter, volume_uuid, class_loader_context, se_info,
2447 downgrade, targetSdkVersion, profile_name, dm_path, compilation_reason, &error_msg);
2448 return res ? error(res, error_msg) : ok();
2449 }
2450
compileLayouts(const std::string & apkPath,const std::string & packageName,const std::string & outDexFile,int uid,bool * _aidl_return)2451 binder::Status InstalldNativeService::compileLayouts(const std::string& apkPath,
2452 const std::string& packageName,
2453 const std ::string& outDexFile, int uid,
2454 bool* _aidl_return) {
2455 const char* apk_path = apkPath.c_str();
2456 const char* package_name = packageName.c_str();
2457 const char* out_dex_file = outDexFile.c_str();
2458 *_aidl_return = android::installd::view_compiler(apk_path, package_name, out_dex_file, uid);
2459 return *_aidl_return ? ok() : error("viewcompiler failed");
2460 }
2461
linkNativeLibraryDirectory(const std::optional<std::string> & uuid,const std::string & packageName,const std::string & nativeLibPath32,int32_t userId)2462 binder::Status InstalldNativeService::linkNativeLibraryDirectory(
2463 const std::optional<std::string>& uuid, const std::string& packageName,
2464 const std::string& nativeLibPath32, int32_t userId) {
2465 ENFORCE_UID(AID_SYSTEM);
2466 CHECK_ARGUMENT_UUID(uuid);
2467 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
2468 CHECK_ARGUMENT_PATH(nativeLibPath32);
2469 std::lock_guard<std::recursive_mutex> lock(mLock);
2470
2471 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
2472 const char* pkgname = packageName.c_str();
2473 const char* asecLibDir = nativeLibPath32.c_str();
2474 struct stat s, libStat;
2475 binder::Status res = ok();
2476
2477 auto _pkgdir = create_data_user_ce_package_path(uuid_, userId, pkgname);
2478 auto _libsymlink = _pkgdir + PKG_LIB_POSTFIX;
2479
2480 const char* pkgdir = _pkgdir.c_str();
2481 const char* libsymlink = _libsymlink.c_str();
2482
2483 if (stat(pkgdir, &s) < 0) {
2484 return error("Failed to stat " + _pkgdir);
2485 }
2486
2487 char *con = nullptr;
2488 if (lgetfilecon(pkgdir, &con) < 0) {
2489 return error("Failed to lgetfilecon " + _pkgdir);
2490 }
2491
2492 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) {
2493 res = error("Failed to chown " + _pkgdir);
2494 goto out;
2495 }
2496
2497 if (chmod(pkgdir, 0700) < 0) {
2498 res = error("Failed to chmod " + _pkgdir);
2499 goto out;
2500 }
2501
2502 if (lstat(libsymlink, &libStat) < 0) {
2503 if (errno != ENOENT) {
2504 res = error("Failed to stat " + _libsymlink);
2505 goto out;
2506 }
2507 } else {
2508 if (S_ISDIR(libStat.st_mode)) {
2509 if (delete_dir_contents(libsymlink, 1, nullptr) < 0) {
2510 res = error("Failed to delete " + _libsymlink);
2511 goto out;
2512 }
2513 } else if (S_ISLNK(libStat.st_mode)) {
2514 if (unlink(libsymlink) < 0) {
2515 res = error("Failed to unlink " + _libsymlink);
2516 goto out;
2517 }
2518 }
2519 }
2520
2521 if (symlink(asecLibDir, libsymlink) < 0) {
2522 res = error("Failed to symlink " + _libsymlink + " to " + nativeLibPath32);
2523 goto out;
2524 }
2525
2526 if (lsetfilecon(libsymlink, con) < 0) {
2527 res = error("Failed to lsetfilecon " + _libsymlink);
2528 goto out;
2529 }
2530
2531 out:
2532 free(con);
2533 if (chmod(pkgdir, s.st_mode) < 0) {
2534 auto msg = "Failed to cleanup chmod " + _pkgdir;
2535 if (res.isOk()) {
2536 res = error(msg);
2537 } else {
2538 PLOG(ERROR) << msg;
2539 }
2540 }
2541
2542 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) {
2543 auto msg = "Failed to cleanup chown " + _pkgdir;
2544 if (res.isOk()) {
2545 res = error(msg);
2546 } else {
2547 PLOG(ERROR) << msg;
2548 }
2549 }
2550
2551 return res;
2552 }
2553
restoreconAppData(const std::optional<std::string> & uuid,const std::string & packageName,int32_t userId,int32_t flags,int32_t appId,const std::string & seInfo)2554 binder::Status InstalldNativeService::restoreconAppData(const std::optional<std::string>& uuid,
2555 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId,
2556 const std::string& seInfo) {
2557 ENFORCE_UID(AID_SYSTEM);
2558 CHECK_ARGUMENT_UUID(uuid);
2559 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
2560 std::lock_guard<std::recursive_mutex> lock(mLock);
2561
2562 binder::Status res = ok();
2563
2564 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here.
2565 unsigned int seflags = SELINUX_ANDROID_RESTORECON_RECURSE;
2566 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
2567 const char* pkgName = packageName.c_str();
2568 const char* seinfo = seInfo.c_str();
2569
2570 uid_t uid = multiuser_get_uid(userId, appId);
2571 if (flags & FLAG_STORAGE_CE) {
2572 auto path = create_data_user_ce_package_path(uuid_, userId, pkgName);
2573 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) {
2574 res = error("restorecon failed for " + path);
2575 }
2576 }
2577 if (flags & FLAG_STORAGE_DE) {
2578 auto path = create_data_user_de_package_path(uuid_, userId, pkgName);
2579 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) {
2580 res = error("restorecon failed for " + path);
2581 }
2582 }
2583 return res;
2584 }
2585
createOatDir(const std::string & oatDir,const std::string & instructionSet)2586 binder::Status InstalldNativeService::createOatDir(const std::string& oatDir,
2587 const std::string& instructionSet) {
2588 ENFORCE_UID(AID_SYSTEM);
2589 CHECK_ARGUMENT_PATH(oatDir);
2590 std::lock_guard<std::recursive_mutex> lock(mLock);
2591
2592 const char* oat_dir = oatDir.c_str();
2593 const char* instruction_set = instructionSet.c_str();
2594 char oat_instr_dir[PKG_PATH_MAX];
2595
2596 if (validate_apk_path(oat_dir)) {
2597 return error("Invalid path " + oatDir);
2598 }
2599 if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) {
2600 return error("Failed to prepare " + oatDir);
2601 }
2602 if (selinux_android_restorecon(oat_dir, 0)) {
2603 return error("Failed to restorecon " + oatDir);
2604 }
2605 snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set);
2606 if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) {
2607 return error(StringPrintf("Failed to prepare %s", oat_instr_dir));
2608 }
2609 return ok();
2610 }
2611
rmPackageDir(const std::string & packageDir)2612 binder::Status InstalldNativeService::rmPackageDir(const std::string& packageDir) {
2613 ENFORCE_UID(AID_SYSTEM);
2614 CHECK_ARGUMENT_PATH(packageDir);
2615 std::lock_guard<std::recursive_mutex> lock(mLock);
2616
2617 if (validate_apk_path(packageDir.c_str())) {
2618 return error("Invalid path " + packageDir);
2619 }
2620 if (rm_package_dir(packageDir) != 0) {
2621 return error("Failed to delete " + packageDir);
2622 }
2623 return ok();
2624 }
2625
linkFile(const std::string & relativePath,const std::string & fromBase,const std::string & toBase)2626 binder::Status InstalldNativeService::linkFile(const std::string& relativePath,
2627 const std::string& fromBase, const std::string& toBase) {
2628 ENFORCE_UID(AID_SYSTEM);
2629 CHECK_ARGUMENT_PATH(fromBase);
2630 CHECK_ARGUMENT_PATH(toBase);
2631 std::lock_guard<std::recursive_mutex> lock(mLock);
2632
2633 const char* relative_path = relativePath.c_str();
2634 const char* from_base = fromBase.c_str();
2635 const char* to_base = toBase.c_str();
2636 char from_path[PKG_PATH_MAX];
2637 char to_path[PKG_PATH_MAX];
2638 snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path);
2639 snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path);
2640
2641 if (validate_apk_path_subdirs(from_path)) {
2642 return error(StringPrintf("Invalid from path %s", from_path));
2643 }
2644
2645 if (validate_apk_path_subdirs(to_path)) {
2646 return error(StringPrintf("Invalid to path %s", to_path));
2647 }
2648
2649 if (link(from_path, to_path) < 0) {
2650 return error(StringPrintf("Failed to link from %s to %s", from_path, to_path));
2651 }
2652
2653 return ok();
2654 }
2655
moveAb(const std::string & apkPath,const std::string & instructionSet,const std::string & outputPath)2656 binder::Status InstalldNativeService::moveAb(const std::string& apkPath,
2657 const std::string& instructionSet, const std::string& outputPath) {
2658 ENFORCE_UID(AID_SYSTEM);
2659 CHECK_ARGUMENT_PATH(apkPath);
2660 CHECK_ARGUMENT_PATH(outputPath);
2661 std::lock_guard<std::recursive_mutex> lock(mLock);
2662
2663 const char* apk_path = apkPath.c_str();
2664 const char* instruction_set = instructionSet.c_str();
2665 const char* oat_dir = outputPath.c_str();
2666
2667 bool success = move_ab(apk_path, instruction_set, oat_dir);
2668 return success ? ok() : error();
2669 }
2670
deleteOdex(const std::string & apkPath,const std::string & instructionSet,const std::optional<std::string> & outputPath,int64_t * _aidl_return)2671 binder::Status InstalldNativeService::deleteOdex(const std::string& apkPath,
2672 const std::string& instructionSet, const std::optional<std::string>& outputPath,
2673 int64_t* _aidl_return) {
2674 ENFORCE_UID(AID_SYSTEM);
2675 CHECK_ARGUMENT_PATH(apkPath);
2676 CHECK_ARGUMENT_PATH(outputPath);
2677 std::lock_guard<std::recursive_mutex> lock(mLock);
2678
2679 const char* apk_path = apkPath.c_str();
2680 const char* instruction_set = instructionSet.c_str();
2681 const char* oat_dir = outputPath ? outputPath->c_str() : nullptr;
2682
2683 *_aidl_return = delete_odex(apk_path, instruction_set, oat_dir);
2684 return *_aidl_return == -1 ? error() : ok();
2685 }
2686
2687 // This kernel feature is experimental.
2688 // TODO: remove local definition once upstreamed
2689 #ifndef FS_IOC_ENABLE_VERITY
2690
2691 #define FS_IOC_ENABLE_VERITY _IO('f', 133)
2692 #define FS_IOC_SET_VERITY_MEASUREMENT _IOW('f', 134, struct fsverity_measurement)
2693
2694 #define FS_VERITY_ALG_SHA256 1
2695
2696 struct fsverity_measurement {
2697 __u16 digest_algorithm;
2698 __u16 digest_size;
2699 __u32 reserved1;
2700 __u64 reserved2[3];
2701 __u8 digest[];
2702 };
2703
2704 #endif
2705
installApkVerity(const std::string & filePath,android::base::unique_fd verityInputAshmem,int32_t contentSize)2706 binder::Status InstalldNativeService::installApkVerity(const std::string& filePath,
2707 android::base::unique_fd verityInputAshmem, int32_t contentSize) {
2708 ENFORCE_UID(AID_SYSTEM);
2709 CHECK_ARGUMENT_PATH(filePath);
2710 std::lock_guard<std::recursive_mutex> lock(mLock);
2711
2712 if (!android::base::GetBoolProperty(kPropApkVerityMode, false)) {
2713 return ok();
2714 }
2715 #ifndef NDEBUG
2716 ASSERT_PAGE_SIZE_4K();
2717 #endif
2718 // TODO: also check fsverity support in the current file system if compiled with DEBUG.
2719 // TODO: change ashmem to some temporary file to support huge apk.
2720 if (!ashmem_valid(verityInputAshmem.get())) {
2721 return error("FD is not an ashmem");
2722 }
2723
2724 // 1. Seek to the next page boundary beyond the end of the file.
2725 ::android::base::unique_fd wfd(open(filePath.c_str(), O_WRONLY));
2726 if (wfd.get() < 0) {
2727 return error("Failed to open " + filePath);
2728 }
2729 struct stat st;
2730 if (fstat(wfd.get(), &st) < 0) {
2731 return error("Failed to stat " + filePath);
2732 }
2733 // fsverity starts from the block boundary.
2734 off_t padding = kVerityPageSize - st.st_size % kVerityPageSize;
2735 if (padding == kVerityPageSize) {
2736 padding = 0;
2737 }
2738 if (lseek(wfd.get(), st.st_size + padding, SEEK_SET) < 0) {
2739 return error("Failed to lseek " + filePath);
2740 }
2741
2742 // 2. Write everything in the ashmem to the file. Note that allocated
2743 // ashmem size is multiple of page size, which is different from the
2744 // actual content size.
2745 int shmSize = ashmem_get_size_region(verityInputAshmem.get());
2746 if (shmSize < 0) {
2747 return error("Failed to get ashmem size: " + std::to_string(shmSize));
2748 }
2749 if (contentSize < 0) {
2750 return error("Invalid content size: " + std::to_string(contentSize));
2751 }
2752 if (contentSize > shmSize) {
2753 return error("Content size overflow: " + std::to_string(contentSize) + " > " +
2754 std::to_string(shmSize));
2755 }
2756 auto data = std::unique_ptr<void, std::function<void (void *)>>(
2757 mmap(nullptr, contentSize, PROT_READ, MAP_SHARED, verityInputAshmem.get(), 0),
2758 [contentSize] (void* ptr) {
2759 if (ptr != MAP_FAILED) {
2760 munmap(ptr, contentSize);
2761 }
2762 });
2763
2764 if (data.get() == MAP_FAILED) {
2765 return error("Failed to mmap the ashmem");
2766 }
2767 char* cursor = reinterpret_cast<char*>(data.get());
2768 int remaining = contentSize;
2769 while (remaining > 0) {
2770 int ret = TEMP_FAILURE_RETRY(write(wfd.get(), cursor, remaining));
2771 if (ret < 0) {
2772 return error("Failed to write to " + filePath + " (" + std::to_string(remaining) +
2773 + "/" + std::to_string(contentSize) + ")");
2774 }
2775 cursor += ret;
2776 remaining -= ret;
2777 }
2778 wfd.reset();
2779
2780 // 3. Enable fsverity (needs readonly fd. Once it's done, the file becomes immutable.
2781 ::android::base::unique_fd rfd(open(filePath.c_str(), O_RDONLY));
2782 if (ioctl(rfd.get(), FS_IOC_ENABLE_VERITY, nullptr) < 0) {
2783 return error("Failed to enable fsverity on " + filePath);
2784 }
2785 return ok();
2786 }
2787
assertFsverityRootHashMatches(const std::string & filePath,const std::vector<uint8_t> & expectedHash)2788 binder::Status InstalldNativeService::assertFsverityRootHashMatches(const std::string& filePath,
2789 const std::vector<uint8_t>& expectedHash) {
2790 ENFORCE_UID(AID_SYSTEM);
2791 CHECK_ARGUMENT_PATH(filePath);
2792 std::lock_guard<std::recursive_mutex> lock(mLock);
2793
2794 if (!android::base::GetBoolProperty(kPropApkVerityMode, false)) {
2795 return ok();
2796 }
2797 // TODO: also check fsverity support in the current file system if compiled with DEBUG.
2798 if (expectedHash.size() != kSha256Size) {
2799 return error("verity hash size should be " + std::to_string(kSha256Size) + " but is " +
2800 std::to_string(expectedHash.size()));
2801 }
2802
2803 ::android::base::unique_fd fd(open(filePath.c_str(), O_RDONLY));
2804 if (fd.get() < 0) {
2805 return error("Failed to open " + filePath + ": " + strerror(errno));
2806 }
2807
2808 unsigned int buffer_size = sizeof(fsverity_measurement) + kSha256Size;
2809 std::vector<char> buffer(buffer_size, 0);
2810
2811 fsverity_measurement* config = reinterpret_cast<fsverity_measurement*>(buffer.data());
2812 config->digest_algorithm = FS_VERITY_ALG_SHA256;
2813 config->digest_size = kSha256Size;
2814 memcpy(config->digest, expectedHash.data(), kSha256Size);
2815 if (ioctl(fd.get(), FS_IOC_SET_VERITY_MEASUREMENT, config) < 0) {
2816 // This includes an expected failure case with no FSVerity setup. It normally happens when
2817 // the apk does not contains the Merkle tree root hash.
2818 return error("Failed to measure fsverity on " + filePath + ": " + strerror(errno));
2819 }
2820 return ok(); // hashes match
2821 }
2822
reconcileSecondaryDexFile(const std::string & dexPath,const std::string & packageName,int32_t uid,const std::vector<std::string> & isas,const std::optional<std::string> & volumeUuid,int32_t storage_flag,bool * _aidl_return)2823 binder::Status InstalldNativeService::reconcileSecondaryDexFile(
2824 const std::string& dexPath, const std::string& packageName, int32_t uid,
2825 const std::vector<std::string>& isas, const std::optional<std::string>& volumeUuid,
2826 int32_t storage_flag, bool* _aidl_return) {
2827 ENFORCE_UID(AID_SYSTEM);
2828 CHECK_ARGUMENT_UUID(volumeUuid);
2829 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
2830 CHECK_ARGUMENT_PATH(dexPath);
2831 std::lock_guard<std::recursive_mutex> lock(mLock);
2832
2833 bool result = android::installd::reconcile_secondary_dex_file(
2834 dexPath, packageName, uid, isas, volumeUuid, storage_flag, _aidl_return);
2835 return result ? ok() : error();
2836 }
2837
hashSecondaryDexFile(const std::string & dexPath,const std::string & packageName,int32_t uid,const std::optional<std::string> & volumeUuid,int32_t storageFlag,std::vector<uint8_t> * _aidl_return)2838 binder::Status InstalldNativeService::hashSecondaryDexFile(
2839 const std::string& dexPath, const std::string& packageName, int32_t uid,
2840 const std::optional<std::string>& volumeUuid, int32_t storageFlag,
2841 std::vector<uint8_t>* _aidl_return) {
2842 ENFORCE_UID(AID_SYSTEM);
2843 CHECK_ARGUMENT_UUID(volumeUuid);
2844 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
2845 CHECK_ARGUMENT_PATH(dexPath);
2846
2847 // mLock is not taken here since we will never modify the file system.
2848 // If a file is modified just as we are reading it this may result in an
2849 // anomalous hash, but that's ok.
2850 bool result = android::installd::hash_secondary_dex_file(
2851 dexPath, packageName, uid, volumeUuid, storageFlag, _aidl_return);
2852 return result ? ok() : error();
2853 }
2854
invalidateMounts()2855 binder::Status InstalldNativeService::invalidateMounts() {
2856 ENFORCE_UID(AID_SYSTEM);
2857 std::lock_guard<std::recursive_mutex> lock(mMountsLock);
2858
2859 mStorageMounts.clear();
2860
2861 #if !BYPASS_QUOTA
2862 if (!InvalidateQuotaMounts()) {
2863 return error("Failed to read mounts");
2864 }
2865 #endif
2866
2867 std::ifstream in("/proc/mounts");
2868 if (!in.is_open()) {
2869 return error("Failed to read mounts");
2870 }
2871
2872 std::string source;
2873 std::string target;
2874 std::string ignored;
2875 while (!in.eof()) {
2876 std::getline(in, source, ' ');
2877 std::getline(in, target, ' ');
2878 std::getline(in, ignored);
2879
2880 if (android::base::GetBoolProperty(kFuseProp, false)) {
2881 if (target.find(kMntFuse) == 0) {
2882 LOG(DEBUG) << "Found storage mount " << source << " at " << target;
2883 mStorageMounts[source] = target;
2884 }
2885 } else {
2886 #if !BYPASS_SDCARDFS
2887 if (target.find(kMntSdcardfs) == 0) {
2888 LOG(DEBUG) << "Found storage mount " << source << " at " << target;
2889 mStorageMounts[source] = target;
2890 }
2891 #endif
2892 }
2893 }
2894 return ok();
2895 }
2896
2897 // Mount volume's CE and DE storage to mirror
tryMountDataMirror(const std::optional<std::string> & uuid)2898 binder::Status InstalldNativeService::tryMountDataMirror(
2899 const std::optional<std::string>& uuid) {
2900 ENFORCE_UID(AID_SYSTEM);
2901 CHECK_ARGUMENT_UUID(uuid);
2902 if (!sAppDataIsolationEnabled) {
2903 return ok();
2904 }
2905 if (!uuid) {
2906 return error("Should not happen, mounting uuid == null");
2907 }
2908
2909 const char* uuid_ = uuid->c_str();
2910
2911 std::string mirrorVolCePath(StringPrintf("%s/%s", kDataMirrorCePath, uuid_));
2912 std::lock_guard<std::recursive_mutex> lock(mLock);
2913 if (fs_prepare_dir(mirrorVolCePath.c_str(), 0711, AID_SYSTEM, AID_SYSTEM) != 0) {
2914 return error("Failed to create CE mirror");
2915 }
2916
2917 std::string mirrorVolDePath(StringPrintf("%s/%s", kDataMirrorDePath, uuid_));
2918 if (fs_prepare_dir(mirrorVolDePath.c_str(), 0711, AID_SYSTEM, AID_SYSTEM) != 0) {
2919 return error("Failed to create DE mirror");
2920 }
2921
2922 auto cePath = StringPrintf("%s/user", create_data_path(uuid_).c_str());
2923 auto dePath = StringPrintf("%s/user_de", create_data_path(uuid_).c_str());
2924
2925 if (access(cePath.c_str(), F_OK) != 0) {
2926 return error("Cannot access CE path: " + cePath);
2927 }
2928 if (access(dePath.c_str(), F_OK) != 0) {
2929 return error("Cannot access DE path: " + dePath);
2930 }
2931
2932 struct stat ceStat, mirrorCeStat;
2933 if (stat(cePath.c_str(), &ceStat) != 0) {
2934 return error("Failed to stat " + cePath);
2935 }
2936 if (stat(mirrorVolCePath.c_str(), &mirrorCeStat) != 0) {
2937 return error("Failed to stat " + mirrorVolCePath);
2938 }
2939
2940 if (mirrorCeStat.st_ino == ceStat.st_ino) {
2941 // As it's being called by prepareUserStorage, it can be called multiple times.
2942 // Hence, we if we mount it already, we should skip it.
2943 LOG(WARNING) << "CE dir is mounted already: " + cePath;
2944 return ok();
2945 }
2946
2947 // Mount CE mirror
2948 if (TEMP_FAILURE_RETRY(mount(cePath.c_str(), mirrorVolCePath.c_str(), NULL,
2949 MS_NOSUID | MS_NODEV | MS_NOATIME | MS_BIND | MS_NOEXEC, nullptr)) == -1) {
2950 return error("Failed to mount " + mirrorVolCePath);
2951 }
2952
2953 // Mount DE mirror
2954 if (TEMP_FAILURE_RETRY(mount(dePath.c_str(), mirrorVolDePath.c_str(), NULL,
2955 MS_NOSUID | MS_NODEV | MS_NOATIME | MS_BIND | MS_NOEXEC, nullptr)) == -1) {
2956 return error("Failed to mount " + mirrorVolDePath);
2957 }
2958 return ok();
2959 }
2960
2961 // Unmount volume's CE and DE storage from mirror
onPrivateVolumeRemoved(const std::optional<std::string> & uuid)2962 binder::Status InstalldNativeService::onPrivateVolumeRemoved(
2963 const std::optional<std::string>& uuid) {
2964 ENFORCE_UID(AID_SYSTEM);
2965 CHECK_ARGUMENT_UUID(uuid);
2966 if (!sAppDataIsolationEnabled) {
2967 return ok();
2968 }
2969 if (!uuid) {
2970 // It happens when private volume failed to mount.
2971 LOG(INFO) << "Ignore unmount uuid=null";
2972 return ok();
2973 }
2974 const char* uuid_ = uuid->c_str();
2975
2976 binder::Status res = ok();
2977
2978 std::string mirrorCeVolPath(StringPrintf("%s/%s", kDataMirrorCePath, uuid_));
2979 std::string mirrorDeVolPath(StringPrintf("%s/%s", kDataMirrorDePath, uuid_));
2980
2981 // Unmount CE storage
2982 std::lock_guard<std::recursive_mutex> lock(mLock);
2983 if (TEMP_FAILURE_RETRY(umount(mirrorCeVolPath.c_str())) != 0) {
2984 if (errno != ENOENT) {
2985 res = error(StringPrintf("Failed to umount %s %s", mirrorCeVolPath.c_str(),
2986 strerror(errno)));
2987 }
2988 }
2989 if (delete_dir_contents_and_dir(mirrorCeVolPath, true) != 0) {
2990 res = error("Failed to delete " + mirrorCeVolPath);
2991 }
2992
2993 // Unmount DE storage
2994 if (TEMP_FAILURE_RETRY(umount(mirrorDeVolPath.c_str())) != 0) {
2995 if (errno != ENOENT) {
2996 res = error(StringPrintf("Failed to umount %s %s", mirrorDeVolPath.c_str(),
2997 strerror(errno)));
2998 }
2999 }
3000 if (delete_dir_contents_and_dir(mirrorDeVolPath, true) != 0) {
3001 res = error("Failed to delete " + mirrorDeVolPath);
3002 }
3003 return res;
3004 }
3005
findDataMediaPath(const std::optional<std::string> & uuid,userid_t userid)3006 std::string InstalldNativeService::findDataMediaPath(
3007 const std::optional<std::string>& uuid, userid_t userid) {
3008 std::lock_guard<std::recursive_mutex> lock(mMountsLock);
3009 const char* uuid_ = uuid ? uuid->c_str() : nullptr;
3010 auto path = StringPrintf("%s/media", create_data_path(uuid_).c_str());
3011 auto resolved = mStorageMounts[path];
3012 if (resolved.empty()) {
3013 LOG(WARNING) << "Failed to find storage mount for " << path;
3014 resolved = path;
3015 }
3016 return StringPrintf("%s/%u", resolved.c_str(), userid);
3017 }
3018
isQuotaSupported(const std::optional<std::string> & uuid,bool * _aidl_return)3019 binder::Status InstalldNativeService::isQuotaSupported(
3020 const std::optional<std::string>& uuid, bool* _aidl_return) {
3021 *_aidl_return = IsQuotaSupported(uuid.value_or(""));
3022 return ok();
3023 }
3024
prepareAppProfile(const std::string & packageName,int32_t userId,int32_t appId,const std::string & profileName,const std::string & codePath,const std::optional<std::string> & dexMetadata,bool * _aidl_return)3025 binder::Status InstalldNativeService::prepareAppProfile(const std::string& packageName,
3026 int32_t userId, int32_t appId, const std::string& profileName, const std::string& codePath,
3027 const std::optional<std::string>& dexMetadata, bool* _aidl_return) {
3028 ENFORCE_UID(AID_SYSTEM);
3029 CHECK_ARGUMENT_PACKAGE_NAME(packageName);
3030 CHECK_ARGUMENT_PATH(codePath);
3031 std::lock_guard<std::recursive_mutex> lock(mLock);
3032
3033 *_aidl_return = prepare_app_profile(packageName, userId, appId, profileName, codePath,
3034 dexMetadata);
3035 return ok();
3036 }
3037
migrateLegacyObbData()3038 binder::Status InstalldNativeService::migrateLegacyObbData() {
3039 ENFORCE_UID(AID_SYSTEM);
3040 // NOTE: The lint warning doesn't apply to the use of system(3) with
3041 // absolute parse and no command line arguments.
3042 if (system("/system/bin/migrate_legacy_obb_data.sh") != 0) { // NOLINT(cert-env33-c)
3043 LOG(ERROR) << "Unable to migrate legacy obb data";
3044 }
3045
3046 return ok();
3047 }
3048
3049 } // namespace installd
3050 } // namespace android
3051