InstalldNativeService.cpp revision 5c6944c35211accd783d2584fac6421dd0af5bdd
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 <errno.h> 22#include <inttypes.h> 23#include <fstream> 24#include <fts.h> 25#include <regex> 26#include <stdlib.h> 27#include <string.h> 28#include <sys/capability.h> 29#include <sys/file.h> 30#include <sys/resource.h> 31#include <sys/quota.h> 32#include <sys/stat.h> 33#include <sys/statvfs.h> 34#include <sys/types.h> 35#include <sys/wait.h> 36#include <sys/xattr.h> 37#include <unistd.h> 38 39#include <android-base/logging.h> 40#include <android-base/stringprintf.h> 41#include <android-base/strings.h> 42#include <android-base/unique_fd.h> 43#include <cutils/fs.h> 44#include <cutils/properties.h> 45#include <cutils/sched_policy.h> 46#include <log/log.h> // TODO: Move everything to base/logging. 47#include <logwrap/logwrap.h> 48#include <private/android_filesystem_config.h> 49#include <selinux/android.h> 50#include <system/thread_defs.h> 51#include <utils/Trace.h> 52 53#include "dexopt.h" 54#include "globals.h" 55#include "installd_deps.h" 56#include "otapreopt_utils.h" 57#include "utils.h" 58 59#include "CacheTracker.h" 60#include "MatchExtensionGen.h" 61 62#ifndef LOG_TAG 63#define LOG_TAG "installd" 64#endif 65 66using android::base::StringPrintf; 67using std::endl; 68 69namespace android { 70namespace installd { 71 72static constexpr const char* kCpPath = "/system/bin/cp"; 73static constexpr const char* kXattrDefault = "user.default"; 74 75static constexpr const int MIN_RESTRICTED_HOME_SDK_VERSION = 24; // > M 76 77static constexpr const char* PKG_LIB_POSTFIX = "/lib"; 78static constexpr const char* CACHE_DIR_POSTFIX = "/cache"; 79static constexpr const char* CODE_CACHE_DIR_POSTFIX = "/code_cache"; 80 81static constexpr const char* IDMAP_PREFIX = "/data/resource-cache/"; 82static constexpr const char* IDMAP_SUFFIX = "@idmap"; 83 84// NOTE: keep in sync with StorageManager 85static constexpr int FLAG_STORAGE_DE = 1 << 0; 86static constexpr int FLAG_STORAGE_CE = 1 << 1; 87 88// NOTE: keep in sync with Installer 89static constexpr int FLAG_CLEAR_CACHE_ONLY = 1 << 8; 90static constexpr int FLAG_CLEAR_CODE_CACHE_ONLY = 1 << 9; 91static constexpr int FLAG_USE_QUOTA = 1 << 12; 92static constexpr int FLAG_FREE_CACHE_V2 = 1 << 13; 93static constexpr int FLAG_FREE_CACHE_NOOP = 1 << 14; 94 95namespace { 96 97constexpr const char* kDump = "android.permission.DUMP"; 98 99static binder::Status ok() { 100 return binder::Status::ok(); 101} 102 103static binder::Status exception(uint32_t code, const std::string& msg) { 104 return binder::Status::fromExceptionCode(code, String8(msg.c_str())); 105} 106 107static binder::Status error() { 108 return binder::Status::fromServiceSpecificError(errno); 109} 110 111static binder::Status error(const std::string& msg) { 112 PLOG(ERROR) << msg; 113 return binder::Status::fromServiceSpecificError(errno, String8(msg.c_str())); 114} 115 116static binder::Status error(uint32_t code, const std::string& msg) { 117 LOG(ERROR) << msg << " (" << code << ")"; 118 return binder::Status::fromServiceSpecificError(code, String8(msg.c_str())); 119} 120 121binder::Status checkPermission(const char* permission) { 122 pid_t pid; 123 uid_t uid; 124 125 if (checkCallingPermission(String16(permission), reinterpret_cast<int32_t*>(&pid), 126 reinterpret_cast<int32_t*>(&uid))) { 127 return ok(); 128 } else { 129 return exception(binder::Status::EX_SECURITY, 130 StringPrintf("UID %d / PID %d lacks permission %s", uid, pid, permission)); 131 } 132} 133 134binder::Status checkUid(uid_t expectedUid) { 135 uid_t uid = IPCThreadState::self()->getCallingUid(); 136 if (uid == expectedUid || uid == AID_ROOT) { 137 return ok(); 138 } else { 139 return exception(binder::Status::EX_SECURITY, 140 StringPrintf("UID %d is not expected UID %d", uid, expectedUid)); 141 } 142} 143 144binder::Status checkArgumentUuid(const std::unique_ptr<std::string>& uuid) { 145 if (!uuid || is_valid_filename(*uuid)) { 146 return ok(); 147 } else { 148 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 149 StringPrintf("UUID %s is malformed", uuid->c_str())); 150 } 151} 152 153binder::Status checkArgumentPackageName(const std::string& packageName) { 154 if (is_valid_package_name(packageName.c_str())) { 155 return ok(); 156 } else { 157 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 158 StringPrintf("Package name %s is malformed", packageName.c_str())); 159 } 160} 161 162#define ENFORCE_UID(uid) { \ 163 binder::Status status = checkUid((uid)); \ 164 if (!status.isOk()) { \ 165 return status; \ 166 } \ 167} 168 169#define CHECK_ARGUMENT_UUID(uuid) { \ 170 binder::Status status = checkArgumentUuid((uuid)); \ 171 if (!status.isOk()) { \ 172 return status; \ 173 } \ 174} 175 176#define CHECK_ARGUMENT_PACKAGE_NAME(packageName) { \ 177 binder::Status status = \ 178 checkArgumentPackageName((packageName)); \ 179 if (!status.isOk()) { \ 180 return status; \ 181 } \ 182} 183 184} // namespace 185 186status_t InstalldNativeService::start() { 187 IPCThreadState::self()->disableBackgroundScheduling(true); 188 status_t ret = BinderService<InstalldNativeService>::publish(); 189 if (ret != android::OK) { 190 return ret; 191 } 192 sp<ProcessState> ps(ProcessState::self()); 193 ps->startThreadPool(); 194 ps->giveThreadPoolName(); 195 return android::OK; 196} 197 198status_t InstalldNativeService::dump(int fd, const Vector<String16> & /* args */) { 199 auto out = std::fstream(StringPrintf("/proc/self/fd/%d", fd)); 200 const binder::Status dump_permission = checkPermission(kDump); 201 if (!dump_permission.isOk()) { 202 out << dump_permission.toString8() << endl; 203 return PERMISSION_DENIED; 204 } 205 std::lock_guard<std::recursive_mutex> lock(mLock); 206 207 out << "installd is happy!" << endl; 208 209 out << endl << "Devices with quota support:" << endl; 210 for (const auto& n : mQuotaDevices) { 211 out << " " << n.first << " = " << n.second << endl; 212 } 213 214 out << endl << "Per-UID cache quotas:" << endl; 215 for (const auto& n : mCacheQuotas) { 216 out << " " << n.first << " = " << n.second << endl; 217 } 218 219 out << endl; 220 out.flush(); 221 222 return NO_ERROR; 223} 224 225/** 226 * Perform restorecon of the given path, but only perform recursive restorecon 227 * if the label of that top-level file actually changed. This can save us 228 * significant time by avoiding no-op traversals of large filesystem trees. 229 */ 230static int restorecon_app_data_lazy(const std::string& path, const std::string& seInfo, uid_t uid, 231 bool existing) { 232 int res = 0; 233 char* before = nullptr; 234 char* after = nullptr; 235 236 // Note that SELINUX_ANDROID_RESTORECON_DATADATA flag is set by 237 // libselinux. Not needed here. 238 239 if (lgetfilecon(path.c_str(), &before) < 0) { 240 PLOG(ERROR) << "Failed before getfilecon for " << path; 241 goto fail; 242 } 243 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 0) < 0) { 244 PLOG(ERROR) << "Failed top-level restorecon for " << path; 245 goto fail; 246 } 247 if (lgetfilecon(path.c_str(), &after) < 0) { 248 PLOG(ERROR) << "Failed after getfilecon for " << path; 249 goto fail; 250 } 251 252 // If the initial top-level restorecon above changed the label, then go 253 // back and restorecon everything recursively 254 if (strcmp(before, after)) { 255 if (existing) { 256 LOG(DEBUG) << "Detected label change from " << before << " to " << after << " at " 257 << path << "; running recursive restorecon"; 258 } 259 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 260 SELINUX_ANDROID_RESTORECON_RECURSE) < 0) { 261 PLOG(ERROR) << "Failed recursive restorecon for " << path; 262 goto fail; 263 } 264 } 265 266 goto done; 267fail: 268 res = -1; 269done: 270 free(before); 271 free(after); 272 return res; 273} 274 275static int restorecon_app_data_lazy(const std::string& parent, const char* name, 276 const std::string& seInfo, uid_t uid, bool existing) { 277 return restorecon_app_data_lazy(StringPrintf("%s/%s", parent.c_str(), name), seInfo, uid, 278 existing); 279} 280 281static int prepare_app_dir(const std::string& path, mode_t target_mode, uid_t uid) { 282 if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, uid) != 0) { 283 PLOG(ERROR) << "Failed to prepare " << path; 284 return -1; 285 } 286 return 0; 287} 288 289/** 290 * Prepare an app cache directory, which offers to fix-up the GID and 291 * directory mode flags during a platform upgrade. 292 */ 293static int prepare_app_cache_dir(const std::string& parent, const char* name, mode_t target_mode, 294 uid_t uid, gid_t gid) { 295 auto path = StringPrintf("%s/%s", parent.c_str(), name); 296 struct stat st; 297 if (stat(path.c_str(), &st) != 0) { 298 if (errno == ENOENT) { 299 // This is fine, just create it 300 if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, gid) != 0) { 301 PLOG(ERROR) << "Failed to prepare " << path; 302 return -1; 303 } else { 304 return 0; 305 } 306 } else { 307 PLOG(ERROR) << "Failed to stat " << path; 308 return -1; 309 } 310 } 311 312 mode_t actual_mode = st.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO | S_ISGID); 313 if (st.st_uid != uid) { 314 // Mismatched UID is real trouble; we can't recover 315 LOG(ERROR) << "Mismatched UID at " << path << ": found " << st.st_uid 316 << " but expected " << uid; 317 return -1; 318 } else if (st.st_gid == gid && actual_mode == target_mode) { 319 // Everything looks good! 320 return 0; 321 } 322 323 // Directory is owned correctly, but GID or mode mismatch means it's 324 // probably a platform upgrade so we need to fix them 325 FTS *fts; 326 FTSENT *p; 327 char *argv[] = { (char*) path.c_str(), nullptr }; 328 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 329 PLOG(ERROR) << "Failed to fts_open " << path; 330 return -1; 331 } 332 while ((p = fts_read(fts)) != NULL) { 333 switch (p->fts_info) { 334 case FTS_DP: 335 if (chmod(p->fts_accpath, target_mode) != 0) { 336 PLOG(WARNING) << "Failed to chmod " << p->fts_path; 337 } 338 // Intentional fall through to also set GID 339 case FTS_F: 340 if (chown(p->fts_accpath, -1, gid) != 0) { 341 PLOG(WARNING) << "Failed to chown " << p->fts_path; 342 } 343 break; 344 case FTS_SL: 345 case FTS_SLNONE: 346 if (lchown(p->fts_accpath, -1, gid) != 0) { 347 PLOG(WARNING) << "Failed to chown " << p->fts_path; 348 } 349 break; 350 } 351 } 352 fts_close(fts); 353 return 0; 354} 355 356binder::Status InstalldNativeService::createAppData(const std::unique_ptr<std::string>& uuid, 357 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 358 const std::string& seInfo, int32_t targetSdkVersion, int64_t* _aidl_return) { 359 ENFORCE_UID(AID_SYSTEM); 360 CHECK_ARGUMENT_UUID(uuid); 361 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 362 std::lock_guard<std::recursive_mutex> lock(mLock); 363 364 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 365 const char* pkgname = packageName.c_str(); 366 367 // Assume invalid inode unless filled in below 368 if (_aidl_return != nullptr) *_aidl_return = -1; 369 370 int32_t uid = multiuser_get_uid(userId, appId); 371 int32_t cacheGid = multiuser_get_cache_gid(userId, appId); 372 mode_t targetMode = targetSdkVersion >= MIN_RESTRICTED_HOME_SDK_VERSION ? 0700 : 0751; 373 374 // If UID doesn't have a specific cache GID, use UID value 375 if (cacheGid == -1) { 376 cacheGid = uid; 377 } 378 379 if (flags & FLAG_STORAGE_CE) { 380 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname); 381 bool existing = (access(path.c_str(), F_OK) == 0); 382 383 if (prepare_app_dir(path, targetMode, uid) || 384 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 385 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 386 return error("Failed to prepare " + path); 387 } 388 389 // Consider restorecon over contents if label changed 390 if (restorecon_app_data_lazy(path, seInfo, uid, existing) || 391 restorecon_app_data_lazy(path, "cache", seInfo, uid, existing) || 392 restorecon_app_data_lazy(path, "code_cache", seInfo, uid, existing)) { 393 return error("Failed to restorecon " + path); 394 } 395 396 // Remember inode numbers of cache directories so that we can clear 397 // contents while CE storage is locked 398 if (write_path_inode(path, "cache", kXattrInodeCache) || 399 write_path_inode(path, "code_cache", kXattrInodeCodeCache)) { 400 return error("Failed to write_path_inode for " + path); 401 } 402 403 // And return the CE inode of the top-level data directory so we can 404 // clear contents while CE storage is locked 405 if ((_aidl_return != nullptr) 406 && get_path_inode(path, reinterpret_cast<ino_t*>(_aidl_return)) != 0) { 407 return error("Failed to get_path_inode for " + path); 408 } 409 } 410 if (flags & FLAG_STORAGE_DE) { 411 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 412 bool existing = (access(path.c_str(), F_OK) == 0); 413 414 if (prepare_app_dir(path, targetMode, uid) || 415 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 416 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 417 return error("Failed to prepare " + path); 418 } 419 420 // Consider restorecon over contents if label changed 421 if (restorecon_app_data_lazy(path, seInfo, uid, existing)) { 422 return error("Failed to restorecon " + path); 423 } 424 425 if (property_get_bool("dalvik.vm.usejitprofiles", false)) { 426 const std::string profile_path = create_data_user_profile_package_path(userId, pkgname); 427 // read-write-execute only for the app user. 428 if (fs_prepare_dir_strict(profile_path.c_str(), 0700, uid, uid) != 0) { 429 return error("Failed to prepare " + profile_path); 430 } 431 std::string profile_file = create_primary_profile(profile_path); 432 // read-write only for the app user. 433 if (fs_prepare_file_strict(profile_file.c_str(), 0600, uid, uid) != 0) { 434 return error("Failed to prepare " + profile_path); 435 } 436 const std::string ref_profile_path = create_data_ref_profile_package_path(pkgname); 437 // dex2oat/profman runs under the shared app gid and it needs to read/write reference 438 // profiles. 439 int shared_app_gid = multiuser_get_shared_gid(0, appId); 440 if ((shared_app_gid != -1) && fs_prepare_dir_strict( 441 ref_profile_path.c_str(), 0700, shared_app_gid, shared_app_gid) != 0) { 442 return error("Failed to prepare " + ref_profile_path); 443 } 444 } 445 } 446 return ok(); 447} 448 449binder::Status InstalldNativeService::migrateAppData(const std::unique_ptr<std::string>& uuid, 450 const std::string& packageName, int32_t userId, int32_t flags) { 451 ENFORCE_UID(AID_SYSTEM); 452 CHECK_ARGUMENT_UUID(uuid); 453 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 454 std::lock_guard<std::recursive_mutex> lock(mLock); 455 456 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 457 const char* pkgname = packageName.c_str(); 458 459 // This method only exists to upgrade system apps that have requested 460 // forceDeviceEncrypted, so their default storage always lives in a 461 // consistent location. This only works on non-FBE devices, since we 462 // never want to risk exposing data on a device with real CE/DE storage. 463 464 auto ce_path = create_data_user_ce_package_path(uuid_, userId, pkgname); 465 auto de_path = create_data_user_de_package_path(uuid_, userId, pkgname); 466 467 // If neither directory is marked as default, assume CE is default 468 if (getxattr(ce_path.c_str(), kXattrDefault, nullptr, 0) == -1 469 && getxattr(de_path.c_str(), kXattrDefault, nullptr, 0) == -1) { 470 if (setxattr(ce_path.c_str(), kXattrDefault, nullptr, 0, 0) != 0) { 471 return error("Failed to mark default storage " + ce_path); 472 } 473 } 474 475 // Migrate default data location if needed 476 auto target = (flags & FLAG_STORAGE_DE) ? de_path : ce_path; 477 auto source = (flags & FLAG_STORAGE_DE) ? ce_path : de_path; 478 479 if (getxattr(target.c_str(), kXattrDefault, nullptr, 0) == -1) { 480 LOG(WARNING) << "Requested default storage " << target 481 << " is not active; migrating from " << source; 482 if (delete_dir_contents_and_dir(target) != 0) { 483 return error("Failed to delete " + target); 484 } 485 if (rename(source.c_str(), target.c_str()) != 0) { 486 return error("Failed to rename " + source + " to " + target); 487 } 488 } 489 490 return ok(); 491} 492 493 494binder::Status InstalldNativeService::clearAppProfiles(const std::string& packageName) { 495 ENFORCE_UID(AID_SYSTEM); 496 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 497 std::lock_guard<std::recursive_mutex> lock(mLock); 498 499 const char* pkgname = packageName.c_str(); 500 binder::Status res = ok(); 501 if (!clear_reference_profile(pkgname)) { 502 res = error("Failed to clear reference profile for " + packageName); 503 } 504 if (!clear_current_profiles(pkgname)) { 505 res = error("Failed to clear current profiles for " + packageName); 506 } 507 return res; 508} 509 510binder::Status InstalldNativeService::clearAppData(const std::unique_ptr<std::string>& uuid, 511 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 512 ENFORCE_UID(AID_SYSTEM); 513 CHECK_ARGUMENT_UUID(uuid); 514 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 515 std::lock_guard<std::recursive_mutex> lock(mLock); 516 517 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 518 const char* pkgname = packageName.c_str(); 519 520 binder::Status res = ok(); 521 if (flags & FLAG_STORAGE_CE) { 522 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 523 if (flags & FLAG_CLEAR_CACHE_ONLY) { 524 path = read_path_inode(path, "cache", kXattrInodeCache); 525 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 526 path = read_path_inode(path, "code_cache", kXattrInodeCodeCache); 527 } 528 if (access(path.c_str(), F_OK) == 0) { 529 if (delete_dir_contents(path) != 0) { 530 res = error("Failed to delete contents of " + path); 531 } 532 } 533 } 534 if (flags & FLAG_STORAGE_DE) { 535 std::string suffix = ""; 536 bool only_cache = false; 537 if (flags & FLAG_CLEAR_CACHE_ONLY) { 538 suffix = CACHE_DIR_POSTFIX; 539 only_cache = true; 540 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 541 suffix = CODE_CACHE_DIR_POSTFIX; 542 only_cache = true; 543 } 544 545 auto path = create_data_user_de_package_path(uuid_, userId, pkgname) + suffix; 546 if (access(path.c_str(), F_OK) == 0) { 547 if (delete_dir_contents(path) != 0) { 548 res = error("Failed to delete contents of " + path); 549 } 550 } 551 if (!only_cache) { 552 if (!clear_current_profile(pkgname, userId)) { 553 res = error("Failed to clear current profile for " + packageName); 554 } 555 } 556 } 557 return res; 558} 559 560static int destroy_app_reference_profile(const char *pkgname) { 561 return delete_dir_contents_and_dir( 562 create_data_ref_profile_package_path(pkgname), 563 /*ignore_if_missing*/ true); 564} 565 566static int destroy_app_current_profiles(const char *pkgname, userid_t userid) { 567 return delete_dir_contents_and_dir( 568 create_data_user_profile_package_path(userid, pkgname), 569 /*ignore_if_missing*/ true); 570} 571 572binder::Status InstalldNativeService::destroyAppProfiles(const std::string& packageName) { 573 ENFORCE_UID(AID_SYSTEM); 574 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 575 std::lock_guard<std::recursive_mutex> lock(mLock); 576 577 const char* pkgname = packageName.c_str(); 578 binder::Status res = ok(); 579 std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr); 580 for (auto user : users) { 581 if (destroy_app_current_profiles(pkgname, user) != 0) { 582 res = error("Failed to destroy current profiles for " + packageName); 583 } 584 } 585 if (destroy_app_reference_profile(pkgname) != 0) { 586 res = error("Failed to destroy reference profile for " + packageName); 587 } 588 return res; 589} 590 591binder::Status InstalldNativeService::destroyAppData(const std::unique_ptr<std::string>& uuid, 592 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 593 ENFORCE_UID(AID_SYSTEM); 594 CHECK_ARGUMENT_UUID(uuid); 595 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 596 std::lock_guard<std::recursive_mutex> lock(mLock); 597 598 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 599 const char* pkgname = packageName.c_str(); 600 601 binder::Status res = ok(); 602 if (flags & FLAG_STORAGE_CE) { 603 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 604 if (delete_dir_contents_and_dir(path) != 0) { 605 res = error("Failed to delete " + path); 606 } 607 } 608 if (flags & FLAG_STORAGE_DE) { 609 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 610 if (delete_dir_contents_and_dir(path) != 0) { 611 res = error("Failed to delete " + path); 612 } 613 destroy_app_current_profiles(pkgname, userId); 614 // TODO(calin): If the package is still installed by other users it's probably 615 // beneficial to keep the reference profile around. 616 // Verify if it's ok to do that. 617 destroy_app_reference_profile(pkgname); 618 } 619 return res; 620} 621 622binder::Status InstalldNativeService::moveCompleteApp(const std::unique_ptr<std::string>& fromUuid, 623 const std::unique_ptr<std::string>& toUuid, const std::string& packageName, 624 const std::string& dataAppName, int32_t appId, const std::string& seInfo, 625 int32_t targetSdkVersion) { 626 ENFORCE_UID(AID_SYSTEM); 627 CHECK_ARGUMENT_UUID(fromUuid); 628 CHECK_ARGUMENT_UUID(toUuid); 629 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 630 std::lock_guard<std::recursive_mutex> lock(mLock); 631 632 const char* from_uuid = fromUuid ? fromUuid->c_str() : nullptr; 633 const char* to_uuid = toUuid ? toUuid->c_str() : nullptr; 634 const char* package_name = packageName.c_str(); 635 const char* data_app_name = dataAppName.c_str(); 636 637 binder::Status res = ok(); 638 std::vector<userid_t> users = get_known_users(from_uuid); 639 640 // Copy app 641 { 642 auto from = create_data_app_package_path(from_uuid, data_app_name); 643 auto to = create_data_app_package_path(to_uuid, data_app_name); 644 auto to_parent = create_data_app_path(to_uuid); 645 646 char *argv[] = { 647 (char*) kCpPath, 648 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 649 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 650 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 651 (char*) "-P", /* Do not follow symlinks [default] */ 652 (char*) "-d", /* don't dereference symlinks */ 653 (char*) from.c_str(), 654 (char*) to_parent.c_str() 655 }; 656 657 LOG(DEBUG) << "Copying " << from << " to " << to; 658 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 659 if (rc != 0) { 660 res = error(rc, "Failed copying " + from + " to " + to); 661 goto fail; 662 } 663 664 if (selinux_android_restorecon(to.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) { 665 res = error("Failed to restorecon " + to); 666 goto fail; 667 } 668 } 669 670 // Copy private data for all known users 671 for (auto user : users) { 672 673 // Data source may not exist for all users; that's okay 674 auto from_ce = create_data_user_ce_package_path(from_uuid, user, package_name); 675 if (access(from_ce.c_str(), F_OK) != 0) { 676 LOG(INFO) << "Missing source " << from_ce; 677 continue; 678 } 679 680 if (!createAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, appId, 681 seInfo, targetSdkVersion, nullptr).isOk()) { 682 res = error("Failed to create package target"); 683 goto fail; 684 } 685 686 char *argv[] = { 687 (char*) kCpPath, 688 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 689 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 690 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 691 (char*) "-P", /* Do not follow symlinks [default] */ 692 (char*) "-d", /* don't dereference symlinks */ 693 nullptr, 694 nullptr 695 }; 696 697 { 698 auto from = create_data_user_de_package_path(from_uuid, user, package_name); 699 auto to = create_data_user_de_path(to_uuid, user); 700 argv[6] = (char*) from.c_str(); 701 argv[7] = (char*) to.c_str(); 702 703 LOG(DEBUG) << "Copying " << from << " to " << to; 704 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 705 if (rc != 0) { 706 res = error(rc, "Failed copying " + from + " to " + to); 707 goto fail; 708 } 709 } 710 { 711 auto from = create_data_user_ce_package_path(from_uuid, user, package_name); 712 auto to = create_data_user_ce_path(to_uuid, user); 713 argv[6] = (char*) from.c_str(); 714 argv[7] = (char*) to.c_str(); 715 716 LOG(DEBUG) << "Copying " << from << " to " << to; 717 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 718 if (rc != 0) { 719 res = error(rc, "Failed copying " + from + " to " + to); 720 goto fail; 721 } 722 } 723 724 if (!restoreconAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, 725 appId, seInfo).isOk()) { 726 res = error("Failed to restorecon"); 727 goto fail; 728 } 729 } 730 731 // We let the framework scan the new location and persist that before 732 // deleting the data in the old location; this ordering ensures that 733 // we can recover from things like battery pulls. 734 return ok(); 735 736fail: 737 // Nuke everything we might have already copied 738 { 739 auto to = create_data_app_package_path(to_uuid, data_app_name); 740 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 741 LOG(WARNING) << "Failed to rollback " << to; 742 } 743 } 744 for (auto user : users) { 745 { 746 auto to = create_data_user_de_package_path(to_uuid, user, package_name); 747 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 748 LOG(WARNING) << "Failed to rollback " << to; 749 } 750 } 751 { 752 auto to = create_data_user_ce_package_path(to_uuid, user, package_name); 753 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 754 LOG(WARNING) << "Failed to rollback " << to; 755 } 756 } 757 } 758 return res; 759} 760 761binder::Status InstalldNativeService::createUserData(const std::unique_ptr<std::string>& uuid, 762 int32_t userId, int32_t userSerial ATTRIBUTE_UNUSED, int32_t flags) { 763 ENFORCE_UID(AID_SYSTEM); 764 CHECK_ARGUMENT_UUID(uuid); 765 std::lock_guard<std::recursive_mutex> lock(mLock); 766 767 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 768 if (flags & FLAG_STORAGE_DE) { 769 if (uuid_ == nullptr) { 770 if (ensure_config_user_dirs(userId) != 0) { 771 return error(StringPrintf("Failed to ensure dirs for %d", userId)); 772 } 773 } 774 } 775 return ok(); 776} 777 778binder::Status InstalldNativeService::destroyUserData(const std::unique_ptr<std::string>& uuid, 779 int32_t userId, int32_t flags) { 780 ENFORCE_UID(AID_SYSTEM); 781 CHECK_ARGUMENT_UUID(uuid); 782 std::lock_guard<std::recursive_mutex> lock(mLock); 783 784 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 785 binder::Status res = ok(); 786 if (flags & FLAG_STORAGE_DE) { 787 auto path = create_data_user_de_path(uuid_, userId); 788 if (delete_dir_contents_and_dir(path, true) != 0) { 789 res = error("Failed to delete " + path); 790 } 791 if (uuid_ == nullptr) { 792 path = create_data_misc_legacy_path(userId); 793 if (delete_dir_contents_and_dir(path, true) != 0) { 794 res = error("Failed to delete " + path); 795 } 796 path = create_data_user_profile_path(userId); 797 if (delete_dir_contents_and_dir(path, true) != 0) { 798 res = error("Failed to delete " + path); 799 } 800 } 801 } 802 if (flags & FLAG_STORAGE_CE) { 803 auto path = create_data_user_ce_path(uuid_, userId); 804 if (delete_dir_contents_and_dir(path, true) != 0) { 805 res = error("Failed to delete " + path); 806 } 807 path = create_data_media_path(uuid_, userId); 808 if (delete_dir_contents_and_dir(path, true) != 0) { 809 res = error("Failed to delete " + path); 810 } 811 } 812 return res; 813} 814 815/* Try to ensure free_size bytes of storage are available. 816 * Returns 0 on success. 817 * This is rather simple-minded because doing a full LRU would 818 * be potentially memory-intensive, and without atime it would 819 * also require that apps constantly modify file metadata even 820 * when just reading from the cache, which is pretty awful. 821 */ 822binder::Status InstalldNativeService::freeCache(const std::unique_ptr<std::string>& uuid, 823 int64_t freeStorageSize, int32_t flags) { 824 ENFORCE_UID(AID_SYSTEM); 825 CHECK_ARGUMENT_UUID(uuid); 826 std::lock_guard<std::recursive_mutex> lock(mLock); 827 828 // TODO: remove this once framework is more robust 829 invalidateMounts(); 830 831 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 832 auto data_path = create_data_path(uuid_); 833 auto device = findQuotaDeviceForUuid(uuid); 834 auto noop = (flags & FLAG_FREE_CACHE_NOOP); 835 836 int64_t free = data_disk_free(data_path); 837 int64_t needed = freeStorageSize - free; 838 if (free < 0) { 839 return error("Failed to determine free space for " + data_path); 840 } else if (free >= freeStorageSize) { 841 return ok(); 842 } 843 844 LOG(DEBUG) << "Found " << data_path << " with " << free << " free; caller requested " 845 << freeStorageSize; 846 847 if (flags & FLAG_FREE_CACHE_V2) { 848 // This new cache strategy fairly removes files from UIDs by deleting 849 // files from the UIDs which are most over their allocated quota 850 851 // 1. Create trackers for every known UID 852 ATRACE_BEGIN("create"); 853 std::unordered_map<uid_t, std::shared_ptr<CacheTracker>> trackers; 854 for (auto user : get_known_users(uuid_)) { 855 FTS *fts; 856 FTSENT *p; 857 char *argv[] = { 858 (char*) create_data_user_ce_path(uuid_, user).c_str(), 859 (char*) create_data_user_de_path(uuid_, user).c_str(), 860 nullptr 861 }; 862 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 863 return error("Failed to fts_open"); 864 } 865 while ((p = fts_read(fts)) != NULL) { 866 if (p->fts_info == FTS_D && p->fts_level == 1) { 867 uid_t uid = p->fts_statp->st_uid; 868 auto search = trackers.find(uid); 869 if (search != trackers.end()) { 870 search->second->addDataPath(p->fts_path); 871 } else { 872 auto tracker = std::shared_ptr<CacheTracker>(new CacheTracker( 873 multiuser_get_user_id(uid), multiuser_get_app_id(uid), device)); 874 tracker->addDataPath(p->fts_path); 875 tracker->cacheQuota = mCacheQuotas[uid]; 876 if (tracker->cacheQuota == 0) { 877 LOG(WARNING) << "UID " << uid << " has no cache quota; assuming 64MB"; 878 tracker->cacheQuota = 67108864; 879 } 880 trackers[uid] = tracker; 881 } 882 fts_set(fts, p, FTS_SKIP); 883 } 884 } 885 fts_close(fts); 886 } 887 ATRACE_END(); 888 889 // 2. Populate tracker stats and insert into priority queue 890 ATRACE_BEGIN("populate"); 891 auto cmp = [](std::shared_ptr<CacheTracker> left, std::shared_ptr<CacheTracker> right) { 892 return (left->getCacheRatio() < right->getCacheRatio()); 893 }; 894 std::priority_queue<std::shared_ptr<CacheTracker>, 895 std::vector<std::shared_ptr<CacheTracker>>, decltype(cmp)> queue(cmp); 896 for (const auto& it : trackers) { 897 it.second->loadStats(); 898 queue.push(it.second); 899 } 900 ATRACE_END(); 901 902 // 3. Bounce across the queue, freeing items from whichever tracker is 903 // the most over their assigned quota 904 ATRACE_BEGIN("bounce"); 905 std::shared_ptr<CacheTracker> active; 906 while (active || !queue.empty()) { 907 // Find the best tracker to work with; this might involve swapping 908 // if the active tracker is no longer the most over quota 909 bool nextBetter = active && !queue.empty() 910 && active->getCacheRatio() < queue.top()->getCacheRatio(); 911 if (!active || nextBetter) { 912 if (active) { 913 // Current tracker still has items, so we'll consider it 914 // again later once it bubbles up to surface 915 queue.push(active); 916 } 917 active = queue.top(); queue.pop(); 918 active->ensureItems(); 919 continue; 920 } 921 922 // If no items remain, go find another tracker 923 if (active->items.empty()) { 924 active = nullptr; 925 continue; 926 } else { 927 auto item = active->items.back(); 928 active->items.pop_back(); 929 930 LOG(DEBUG) << "Purging " << item->toString() << " from " << active->toString(); 931 if (!noop) { 932 item->purge(); 933 } 934 active->cacheUsed -= item->size; 935 needed -= item->size; 936 } 937 938 // Verify that we're actually done before bailing, since sneaky 939 // apps might be using hardlinks 940 if (needed <= 0) { 941 free = data_disk_free(data_path); 942 needed = freeStorageSize - free; 943 if (needed <= 0) { 944 break; 945 } else { 946 LOG(WARNING) << "Expected to be done but still need " << needed; 947 } 948 } 949 } 950 ATRACE_END(); 951 952 } else { 953 ATRACE_BEGIN("start"); 954 cache_t* cache = start_cache_collection(); 955 ATRACE_END(); 956 957 ATRACE_BEGIN("add"); 958 for (auto user : get_known_users(uuid_)) { 959 add_cache_files(cache, create_data_user_ce_path(uuid_, user)); 960 add_cache_files(cache, create_data_user_de_path(uuid_, user)); 961 add_cache_files(cache, 962 StringPrintf("%s/Android/data", create_data_media_path(uuid_, user).c_str())); 963 } 964 ATRACE_END(); 965 966 ATRACE_BEGIN("clear"); 967 clear_cache_files(data_path, cache, freeStorageSize); 968 ATRACE_END(); 969 970 ATRACE_BEGIN("finish"); 971 finish_cache_collection(cache); 972 ATRACE_END(); 973 } 974 975 free = data_disk_free(data_path); 976 if (free >= freeStorageSize) { 977 return ok(); 978 } else { 979 return error(StringPrintf("Failed to free up %" PRId64 " on %s; final free space %" PRId64, 980 freeStorageSize, data_path.c_str(), free)); 981 } 982} 983 984binder::Status InstalldNativeService::rmdex(const std::string& codePath, 985 const std::string& instructionSet) { 986 ENFORCE_UID(AID_SYSTEM); 987 std::lock_guard<std::recursive_mutex> lock(mLock); 988 989 char dex_path[PKG_PATH_MAX]; 990 991 const char* path = codePath.c_str(); 992 const char* instruction_set = instructionSet.c_str(); 993 994 if (validate_apk_path(path) && validate_system_app_path(path)) { 995 return error("Invalid path " + codePath); 996 } 997 998 if (!create_cache_path(dex_path, path, instruction_set)) { 999 return error("Failed to create cache path for " + codePath); 1000 } 1001 1002 ALOGV("unlink %s\n", dex_path); 1003 if (unlink(dex_path) < 0) { 1004 return error(StringPrintf("Failed to unlink %s", dex_path)); 1005 } else { 1006 return ok(); 1007 } 1008} 1009 1010struct stats { 1011 int64_t codeSize; 1012 int64_t dataSize; 1013 int64_t cacheSize; 1014}; 1015 1016#if MEASURE_DEBUG 1017static std::string toString(std::vector<int64_t> values) { 1018 std::stringstream res; 1019 res << "["; 1020 for (size_t i = 0; i < values.size(); i++) { 1021 res << values[i]; 1022 if (i < values.size() - 1) { 1023 res << ","; 1024 } 1025 } 1026 res << "]"; 1027 return res.str(); 1028} 1029#endif 1030 1031static void collectQuotaStats(const std::string& device, int32_t userId, 1032 int32_t appId, struct stats* stats, struct stats* extStats) { 1033 if (device.empty()) return; 1034 1035 struct dqblk dq; 1036 1037 uid_t uid = multiuser_get_uid(userId, appId); 1038 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1039 reinterpret_cast<char*>(&dq)) != 0) { 1040 if (errno != ESRCH) { 1041 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1042 } 1043 } else { 1044#if MEASURE_DEBUG 1045 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1046#endif 1047 stats->dataSize += dq.dqb_curspace; 1048 } 1049 1050 int cacheGid = multiuser_get_cache_gid(userId, appId); 1051 if (cacheGid != -1) { 1052 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), cacheGid, 1053 reinterpret_cast<char*>(&dq)) != 0) { 1054 if (errno != ESRCH) { 1055 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << cacheGid; 1056 } 1057 } else { 1058#if MEASURE_DEBUG 1059 LOG(DEBUG) << "quotactl() for GID " << cacheGid << " " << dq.dqb_curspace; 1060#endif 1061 stats->cacheSize += dq.dqb_curspace; 1062 } 1063 } 1064 1065 int extGid = multiuser_get_ext_gid(userId, appId); 1066 if (extGid != -1) { 1067 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), extGid, 1068 reinterpret_cast<char*>(&dq)) != 0) { 1069 if (errno != ESRCH) { 1070 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << extGid; 1071 } 1072 } else { 1073#if MEASURE_DEBUG 1074 LOG(DEBUG) << "quotactl() for GID " << extGid << " " << dq.dqb_curspace; 1075#endif 1076 extStats->dataSize += dq.dqb_curspace; 1077 } 1078 } 1079 1080 int sharedGid = multiuser_get_shared_gid(userId, appId); 1081 if (sharedGid != -1) { 1082 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), sharedGid, 1083 reinterpret_cast<char*>(&dq)) != 0) { 1084 if (errno != ESRCH) { 1085 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << sharedGid; 1086 } 1087 } else { 1088#if MEASURE_DEBUG 1089 LOG(DEBUG) << "quotactl() for GID " << sharedGid << " " << dq.dqb_curspace; 1090#endif 1091 stats->codeSize += dq.dqb_curspace; 1092 } 1093 } 1094} 1095 1096static void collectManualStats(const std::string& path, struct stats* stats) { 1097 DIR *d; 1098 int dfd; 1099 struct dirent *de; 1100 struct stat s; 1101 1102 d = opendir(path.c_str()); 1103 if (d == nullptr) { 1104 if (errno != ENOENT) { 1105 PLOG(WARNING) << "Failed to open " << path; 1106 } 1107 return; 1108 } 1109 dfd = dirfd(d); 1110 while ((de = readdir(d))) { 1111 const char *name = de->d_name; 1112 1113 int64_t size = 0; 1114 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 1115 size = s.st_blocks * 512; 1116 } 1117 1118 if (de->d_type == DT_DIR) { 1119 if (!strcmp(name, ".")) { 1120 // Don't recurse, but still count node size 1121 } else if (!strcmp(name, "..")) { 1122 // Don't recurse or count node size 1123 continue; 1124 } else { 1125 // Measure all children nodes 1126 size = 0; 1127 calculate_tree_size(StringPrintf("%s/%s", path.c_str(), name), &size); 1128 } 1129 1130 if (!strcmp(name, "cache") || !strcmp(name, "code_cache")) { 1131 stats->cacheSize += size; 1132 } 1133 } 1134 1135 // Legacy symlink isn't owned by app 1136 if (de->d_type == DT_LNK && !strcmp(name, "lib")) { 1137 continue; 1138 } 1139 1140 // Everything found inside is considered data 1141 stats->dataSize += size; 1142 } 1143 closedir(d); 1144} 1145 1146static void collectManualStatsForUser(const std::string& path, struct stats* stats, 1147 bool exclude_apps = false) { 1148 DIR *d; 1149 int dfd; 1150 struct dirent *de; 1151 struct stat s; 1152 1153 d = opendir(path.c_str()); 1154 if (d == nullptr) { 1155 if (errno != ENOENT) { 1156 PLOG(WARNING) << "Failed to open " << path; 1157 } 1158 return; 1159 } 1160 dfd = dirfd(d); 1161 while ((de = readdir(d))) { 1162 if (de->d_type == DT_DIR) { 1163 const char *name = de->d_name; 1164 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) != 0) { 1165 continue; 1166 } 1167 if (!strcmp(name, ".") || !strcmp(name, "..")) { 1168 continue; 1169 } else if (exclude_apps && (s.st_uid >= AID_APP_START && s.st_uid <= AID_APP_END)) { 1170 continue; 1171 } else { 1172 collectManualStats(StringPrintf("%s/%s", path.c_str(), name), stats); 1173 } 1174 } 1175 } 1176 closedir(d); 1177} 1178 1179static void collectManualExternalStatsForUser(const std::string& path, struct stats* stats) { 1180 FTS *fts; 1181 FTSENT *p; 1182 char *argv[] = { (char*) path.c_str(), nullptr }; 1183 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 1184 PLOG(ERROR) << "Failed to fts_open " << path; 1185 return; 1186 } 1187 while ((p = fts_read(fts)) != NULL) { 1188 switch (p->fts_info) { 1189 case FTS_D: 1190 if (p->fts_level == 4 1191 && !strcmp(p->fts_name, "cache") 1192 && !strcmp(p->fts_parent->fts_parent->fts_name, "data") 1193 && !strcmp(p->fts_parent->fts_parent->fts_parent->fts_name, "Android")) { 1194 p->fts_number = 1; 1195 } 1196 p->fts_number = p->fts_parent->fts_number; 1197 // Fall through to count the directory 1198 case FTS_DEFAULT: 1199 case FTS_F: 1200 case FTS_SL: 1201 case FTS_SLNONE: 1202 int64_t size = (p->fts_statp->st_blocks * 512); 1203 if (p->fts_number == 1) { 1204 stats->cacheSize += size; 1205 } 1206 stats->dataSize += size; 1207 break; 1208 } 1209 } 1210 fts_close(fts); 1211} 1212 1213binder::Status InstalldNativeService::getAppSize(const std::unique_ptr<std::string>& uuid, 1214 const std::vector<std::string>& packageNames, int32_t userId, int32_t flags, 1215 int32_t appId, const std::vector<int64_t>& ceDataInodes, 1216 const std::vector<std::string>& codePaths, std::vector<int64_t>* _aidl_return) { 1217 ENFORCE_UID(AID_SYSTEM); 1218 CHECK_ARGUMENT_UUID(uuid); 1219 for (auto packageName : packageNames) { 1220 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1221 } 1222 std::lock_guard<std::recursive_mutex> lock(mLock); 1223 1224 // When modifying this logic, always verify using tests: 1225 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetAppSize 1226 1227#if MEASURE_DEBUG 1228 LOG(INFO) << "Measuring user " << userId << " app " << appId; 1229#endif 1230 1231 // Here's a summary of the common storage locations across the platform, 1232 // and how they're each tagged: 1233 // 1234 // /data/app/com.example UID system 1235 // /data/app/com.example/oat UID system 1236 // /data/user/0/com.example UID u0_a10 GID u0_a10 1237 // /data/user/0/com.example/cache UID u0_a10 GID u0_a10_cache 1238 // /data/media/0/foo.txt UID u0_media_rw 1239 // /data/media/0/bar.jpg UID u0_media_rw GID u0_media_image 1240 // /data/media/0/Android/data/com.example UID u0_media_rw GID u0_a10_ext 1241 // /data/media/0/Android/data/com.example/cache UID u0_media_rw GID u0_a10_ext_cache 1242 // /data/media/obb/com.example UID system 1243 1244 struct stats stats; 1245 struct stats extStats; 1246 memset(&stats, 0, sizeof(stats)); 1247 memset(&extStats, 0, sizeof(extStats)); 1248 1249 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1250 1251 auto device = findQuotaDeviceForUuid(uuid); 1252 if (device.empty()) { 1253 flags &= ~FLAG_USE_QUOTA; 1254 } 1255 1256 ATRACE_BEGIN("obb"); 1257 for (auto packageName : packageNames) { 1258 auto obbCodePath = create_data_media_obb_path(uuid_, packageName.c_str()); 1259 calculate_tree_size(obbCodePath, &extStats.codeSize); 1260 } 1261 ATRACE_END(); 1262 1263 if (flags & FLAG_USE_QUOTA && appId >= AID_APP_START) { 1264 ATRACE_BEGIN("code"); 1265 for (auto codePath : codePaths) { 1266 calculate_tree_size(codePath, &stats.codeSize, -1, 1267 multiuser_get_shared_gid(userId, appId)); 1268 } 1269 ATRACE_END(); 1270 1271 ATRACE_BEGIN("quota"); 1272 collectQuotaStats(device, userId, appId, &stats, &extStats); 1273 ATRACE_END(); 1274 1275 } else { 1276 ATRACE_BEGIN("code"); 1277 for (auto codePath : codePaths) { 1278 calculate_tree_size(codePath, &stats.codeSize); 1279 } 1280 ATRACE_END(); 1281 1282 for (size_t i = 0; i < packageNames.size(); i++) { 1283 const char* pkgname = packageNames[i].c_str(); 1284 1285 ATRACE_BEGIN("data"); 1286 auto cePath = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInodes[i]); 1287 collectManualStats(cePath, &stats); 1288 auto dePath = create_data_user_de_package_path(uuid_, userId, pkgname); 1289 collectManualStats(dePath, &stats); 1290 ATRACE_END(); 1291 1292 ATRACE_BEGIN("profiles"); 1293 auto userProfilePath = create_data_user_profile_package_path(userId, pkgname); 1294 calculate_tree_size(userProfilePath, &stats.dataSize); 1295 auto refProfilePath = create_data_ref_profile_package_path(pkgname); 1296 calculate_tree_size(refProfilePath, &stats.codeSize); 1297 ATRACE_END(); 1298 1299 ATRACE_BEGIN("external"); 1300 auto extPath = create_data_media_package_path(uuid_, userId, pkgname, "data"); 1301 collectManualStats(extPath, &extStats); 1302 auto mediaPath = create_data_media_package_path(uuid_, userId, pkgname, "media"); 1303 calculate_tree_size(mediaPath, &extStats.dataSize); 1304 ATRACE_END(); 1305 } 1306 1307 ATRACE_BEGIN("dalvik"); 1308 int32_t sharedGid = multiuser_get_shared_gid(userId, appId); 1309 if (sharedGid != -1) { 1310 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1311 sharedGid, -1); 1312 } 1313 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize, 1314 multiuser_get_uid(userId, appId), -1); 1315 ATRACE_END(); 1316 } 1317 1318 std::vector<int64_t> ret; 1319 ret.push_back(stats.codeSize); 1320 ret.push_back(stats.dataSize); 1321 ret.push_back(stats.cacheSize); 1322 ret.push_back(extStats.codeSize); 1323 ret.push_back(extStats.dataSize); 1324 ret.push_back(extStats.cacheSize); 1325#if MEASURE_DEBUG 1326 LOG(DEBUG) << "Final result " << toString(ret); 1327#endif 1328 *_aidl_return = ret; 1329 return ok(); 1330} 1331 1332binder::Status InstalldNativeService::getUserSize(const std::unique_ptr<std::string>& uuid, 1333 int32_t userId, int32_t flags, const std::vector<int32_t>& appIds, 1334 std::vector<int64_t>* _aidl_return) { 1335 ENFORCE_UID(AID_SYSTEM); 1336 CHECK_ARGUMENT_UUID(uuid); 1337 std::lock_guard<std::recursive_mutex> lock(mLock); 1338 1339 // When modifying this logic, always verify using tests: 1340 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetUserSize 1341 1342#if MEASURE_DEBUG 1343 LOG(INFO) << "Measuring user " << userId; 1344#endif 1345 1346 struct stats stats; 1347 struct stats extStats; 1348 memset(&stats, 0, sizeof(stats)); 1349 memset(&extStats, 0, sizeof(extStats)); 1350 1351 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1352 1353 auto device = findQuotaDeviceForUuid(uuid); 1354 if (device.empty()) { 1355 flags &= ~FLAG_USE_QUOTA; 1356 } 1357 1358 if (flags & FLAG_USE_QUOTA) { 1359 struct dqblk dq; 1360 1361 ATRACE_BEGIN("obb"); 1362 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), AID_MEDIA_OBB, 1363 reinterpret_cast<char*>(&dq)) != 0) { 1364 if (errno != ESRCH) { 1365 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << AID_MEDIA_OBB; 1366 } 1367 } else { 1368#if MEASURE_DEBUG 1369 LOG(DEBUG) << "quotactl() for GID " << AID_MEDIA_OBB << " " << dq.dqb_curspace; 1370#endif 1371 extStats.codeSize += dq.dqb_curspace; 1372 } 1373 ATRACE_END(); 1374 1375 ATRACE_BEGIN("code"); 1376 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize, -1, -1, true); 1377 ATRACE_END(); 1378 1379 ATRACE_BEGIN("data"); 1380 auto cePath = create_data_user_ce_path(uuid_, userId); 1381 collectManualStatsForUser(cePath, &stats, true); 1382 auto dePath = create_data_user_de_path(uuid_, userId); 1383 collectManualStatsForUser(dePath, &stats, true); 1384 ATRACE_END(); 1385 1386 ATRACE_BEGIN("profile"); 1387 auto userProfilePath = create_data_user_profile_path(userId); 1388 calculate_tree_size(userProfilePath, &stats.dataSize, -1, -1, true); 1389 auto refProfilePath = create_data_ref_profile_path(); 1390 calculate_tree_size(refProfilePath, &stats.codeSize, -1, -1, true); 1391 ATRACE_END(); 1392 1393 ATRACE_BEGIN("external"); 1394 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1395 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1396 reinterpret_cast<char*>(&dq)) != 0) { 1397 if (errno != ESRCH) { 1398 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1399 } 1400 } else { 1401#if MEASURE_DEBUG 1402 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1403#endif 1404 extStats.dataSize += dq.dqb_curspace; 1405 } 1406 ATRACE_END(); 1407 1408 ATRACE_BEGIN("dalvik"); 1409 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1410 -1, -1, true); 1411 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize, 1412 -1, -1, true); 1413 ATRACE_END(); 1414 1415 ATRACE_BEGIN("quota"); 1416 for (auto appId : appIds) { 1417 if (appId >= AID_APP_START) { 1418 collectQuotaStats(device, userId, appId, &stats, &extStats); 1419#if MEASURE_DEBUG 1420 // Sleep to make sure we don't lose logs 1421 usleep(1); 1422#endif 1423 } 1424 } 1425 ATRACE_END(); 1426 } else { 1427 ATRACE_BEGIN("obb"); 1428 auto obbPath = create_data_path(uuid_) + "/media/obb"; 1429 calculate_tree_size(obbPath, &extStats.codeSize); 1430 ATRACE_END(); 1431 1432 ATRACE_BEGIN("code"); 1433 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize); 1434 ATRACE_END(); 1435 1436 ATRACE_BEGIN("data"); 1437 auto cePath = create_data_user_ce_path(uuid_, userId); 1438 collectManualStatsForUser(cePath, &stats); 1439 auto dePath = create_data_user_de_path(uuid_, userId); 1440 collectManualStatsForUser(dePath, &stats); 1441 ATRACE_END(); 1442 1443 ATRACE_BEGIN("profile"); 1444 auto userProfilePath = create_data_user_profile_path(userId); 1445 calculate_tree_size(userProfilePath, &stats.dataSize); 1446 auto refProfilePath = create_data_ref_profile_path(); 1447 calculate_tree_size(refProfilePath, &stats.codeSize); 1448 ATRACE_END(); 1449 1450 ATRACE_BEGIN("external"); 1451 auto dataMediaPath = create_data_media_path(uuid_, userId); 1452 collectManualExternalStatsForUser(dataMediaPath, &extStats); 1453#if MEASURE_DEBUG 1454 LOG(DEBUG) << "Measured external data " << extStats.dataSize << " cache " 1455 << extStats.cacheSize; 1456#endif 1457 ATRACE_END(); 1458 1459 ATRACE_BEGIN("dalvik"); 1460 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize); 1461 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize); 1462 ATRACE_END(); 1463 } 1464 1465 std::vector<int64_t> ret; 1466 ret.push_back(stats.codeSize); 1467 ret.push_back(stats.dataSize); 1468 ret.push_back(stats.cacheSize); 1469 ret.push_back(extStats.codeSize); 1470 ret.push_back(extStats.dataSize); 1471 ret.push_back(extStats.cacheSize); 1472#if MEASURE_DEBUG 1473 LOG(DEBUG) << "Final result " << toString(ret); 1474#endif 1475 *_aidl_return = ret; 1476 return ok(); 1477} 1478 1479binder::Status InstalldNativeService::getExternalSize(const std::unique_ptr<std::string>& uuid, 1480 int32_t userId, int32_t flags, std::vector<int64_t>* _aidl_return) { 1481 ENFORCE_UID(AID_SYSTEM); 1482 CHECK_ARGUMENT_UUID(uuid); 1483 std::lock_guard<std::recursive_mutex> lock(mLock); 1484 1485 // When modifying this logic, always verify using tests: 1486 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetExternalSize 1487 1488#if MEASURE_DEBUG 1489 LOG(INFO) << "Measuring external " << userId; 1490#endif 1491 1492 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1493 1494 int64_t totalSize = 0; 1495 int64_t audioSize = 0; 1496 int64_t videoSize = 0; 1497 int64_t imageSize = 0; 1498 1499 auto device = findQuotaDeviceForUuid(uuid); 1500 if (device.empty()) { 1501 flags &= ~FLAG_USE_QUOTA; 1502 } 1503 1504 if (flags & FLAG_USE_QUOTA) { 1505 struct dqblk dq; 1506 1507 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1508 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1509 reinterpret_cast<char*>(&dq)) != 0) { 1510 if (errno != ESRCH) { 1511 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1512 } 1513 } else { 1514#if MEASURE_DEBUG 1515 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1516#endif 1517 totalSize = dq.dqb_curspace; 1518 } 1519 1520 gid_t audioGid = multiuser_get_uid(userId, AID_MEDIA_AUDIO); 1521 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), audioGid, 1522 reinterpret_cast<char*>(&dq)) == 0) { 1523#if MEASURE_DEBUG 1524 LOG(DEBUG) << "quotactl() for GID " << audioGid << " " << dq.dqb_curspace; 1525#endif 1526 audioSize = dq.dqb_curspace; 1527 } 1528 gid_t videoGid = multiuser_get_uid(userId, AID_MEDIA_VIDEO); 1529 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), videoGid, 1530 reinterpret_cast<char*>(&dq)) == 0) { 1531#if MEASURE_DEBUG 1532 LOG(DEBUG) << "quotactl() for GID " << videoGid << " " << dq.dqb_curspace; 1533#endif 1534 videoSize = dq.dqb_curspace; 1535 } 1536 gid_t imageGid = multiuser_get_uid(userId, AID_MEDIA_IMAGE); 1537 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), imageGid, 1538 reinterpret_cast<char*>(&dq)) == 0) { 1539#if MEASURE_DEBUG 1540 LOG(DEBUG) << "quotactl() for GID " << imageGid << " " << dq.dqb_curspace; 1541#endif 1542 imageSize = dq.dqb_curspace; 1543 } 1544 } else { 1545 FTS *fts; 1546 FTSENT *p; 1547 auto path = create_data_media_path(uuid_, userId); 1548 char *argv[] = { (char*) path.c_str(), nullptr }; 1549 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 1550 return error("Failed to fts_open " + path); 1551 } 1552 while ((p = fts_read(fts)) != NULL) { 1553 char* ext; 1554 int64_t size = (p->fts_statp->st_blocks * 512); 1555 switch (p->fts_info) { 1556 case FTS_F: 1557 // Only categorize files not belonging to apps 1558 if (p->fts_statp->st_gid < AID_APP_START) { 1559 ext = strrchr(p->fts_name, '.'); 1560 if (ext != nullptr) { 1561 switch (MatchExtension(++ext)) { 1562 case AID_MEDIA_AUDIO: audioSize += size; break; 1563 case AID_MEDIA_VIDEO: videoSize += size; break; 1564 case AID_MEDIA_IMAGE: imageSize += size; break; 1565 } 1566 } 1567 } 1568 // Fall through to always count against total 1569 case FTS_D: 1570 case FTS_DEFAULT: 1571 case FTS_SL: 1572 case FTS_SLNONE: 1573 totalSize += size; 1574 break; 1575 } 1576 } 1577 fts_close(fts); 1578 } 1579 1580 std::vector<int64_t> ret; 1581 ret.push_back(totalSize); 1582 ret.push_back(audioSize); 1583 ret.push_back(videoSize); 1584 ret.push_back(imageSize); 1585#if MEASURE_DEBUG 1586 LOG(DEBUG) << "Final result " << toString(ret); 1587#endif 1588 *_aidl_return = ret; 1589 return ok(); 1590} 1591 1592binder::Status InstalldNativeService::setAppQuota(const std::unique_ptr<std::string>& uuid, 1593 int32_t userId, int32_t appId, int64_t cacheQuota) { 1594 ENFORCE_UID(AID_SYSTEM); 1595 CHECK_ARGUMENT_UUID(uuid); 1596 std::lock_guard<std::recursive_mutex> lock(mLock); 1597 1598 int32_t uid = multiuser_get_uid(userId, appId); 1599 mCacheQuotas[uid] = cacheQuota; 1600 1601 return ok(); 1602} 1603 1604// Dumps the contents of a profile file, using pkgname's dex files for pretty 1605// printing the result. 1606binder::Status InstalldNativeService::dumpProfiles(int32_t uid, const std::string& packageName, 1607 const std::string& codePaths, bool* _aidl_return) { 1608 ENFORCE_UID(AID_SYSTEM); 1609 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1610 std::lock_guard<std::recursive_mutex> lock(mLock); 1611 1612 const char* pkgname = packageName.c_str(); 1613 const char* code_paths = codePaths.c_str(); 1614 1615 *_aidl_return = dump_profiles(uid, pkgname, code_paths); 1616 return ok(); 1617} 1618 1619// TODO: Consider returning error codes. 1620binder::Status InstalldNativeService::mergeProfiles(int32_t uid, const std::string& packageName, 1621 bool* _aidl_return) { 1622 ENFORCE_UID(AID_SYSTEM); 1623 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1624 std::lock_guard<std::recursive_mutex> lock(mLock); 1625 1626 const char* pkgname = packageName.c_str(); 1627 *_aidl_return = analyse_profiles(uid, pkgname); 1628 return ok(); 1629} 1630 1631binder::Status InstalldNativeService::dexopt(const std::string& apkPath, int32_t uid, 1632 const std::unique_ptr<std::string>& packageName, const std::string& instructionSet, 1633 int32_t dexoptNeeded, const std::unique_ptr<std::string>& outputPath, int32_t dexFlags, 1634 const std::string& compilerFilter, const std::unique_ptr<std::string>& uuid, 1635 const std::unique_ptr<std::string>& sharedLibraries) { 1636 ENFORCE_UID(AID_SYSTEM); 1637 CHECK_ARGUMENT_UUID(uuid); 1638 if (packageName && *packageName != "*") { 1639 CHECK_ARGUMENT_PACKAGE_NAME(*packageName); 1640 } 1641 std::lock_guard<std::recursive_mutex> lock(mLock); 1642 1643 const char* apk_path = apkPath.c_str(); 1644 const char* pkgname = packageName ? packageName->c_str() : "*"; 1645 const char* instruction_set = instructionSet.c_str(); 1646 const char* oat_dir = outputPath ? outputPath->c_str() : nullptr; 1647 const char* compiler_filter = compilerFilter.c_str(); 1648 const char* volume_uuid = uuid ? uuid->c_str() : nullptr; 1649 const char* shared_libraries = sharedLibraries ? sharedLibraries->c_str() : nullptr; 1650 1651 int res = android::installd::dexopt(apk_path, uid, pkgname, instruction_set, dexoptNeeded, 1652 oat_dir, dexFlags, compiler_filter, volume_uuid, shared_libraries); 1653 return res ? error(res, "Failed to dexopt") : ok(); 1654} 1655 1656binder::Status InstalldNativeService::markBootComplete(const std::string& instructionSet) { 1657 ENFORCE_UID(AID_SYSTEM); 1658 std::lock_guard<std::recursive_mutex> lock(mLock); 1659 1660 const char* instruction_set = instructionSet.c_str(); 1661 1662 char boot_marker_path[PKG_PATH_MAX]; 1663 sprintf(boot_marker_path, 1664 "%s/%s/%s/.booting", 1665 android_data_dir.path, 1666 DALVIK_CACHE, 1667 instruction_set); 1668 1669 ALOGV("mark_boot_complete : %s", boot_marker_path); 1670 if (unlink(boot_marker_path) != 0) { 1671 return error(StringPrintf("Failed to unlink %s", boot_marker_path)); 1672 } 1673 return ok(); 1674} 1675 1676void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid, 1677 struct stat* statbuf) 1678{ 1679 while (path[basepos] != 0) { 1680 if (path[basepos] == '/') { 1681 path[basepos] = 0; 1682 if (lstat(path, statbuf) < 0) { 1683 ALOGV("Making directory: %s\n", path); 1684 if (mkdir(path, mode) == 0) { 1685 chown(path, uid, gid); 1686 } else { 1687 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno)); 1688 } 1689 } 1690 path[basepos] = '/'; 1691 basepos++; 1692 } 1693 basepos++; 1694 } 1695} 1696 1697binder::Status InstalldNativeService::linkNativeLibraryDirectory( 1698 const std::unique_ptr<std::string>& uuid, const std::string& packageName, 1699 const std::string& nativeLibPath32, int32_t userId) { 1700 ENFORCE_UID(AID_SYSTEM); 1701 CHECK_ARGUMENT_UUID(uuid); 1702 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1703 std::lock_guard<std::recursive_mutex> lock(mLock); 1704 1705 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1706 const char* pkgname = packageName.c_str(); 1707 const char* asecLibDir = nativeLibPath32.c_str(); 1708 struct stat s, libStat; 1709 binder::Status res = ok(); 1710 1711 auto _pkgdir = create_data_user_ce_package_path(uuid_, userId, pkgname); 1712 auto _libsymlink = _pkgdir + PKG_LIB_POSTFIX; 1713 1714 const char* pkgdir = _pkgdir.c_str(); 1715 const char* libsymlink = _libsymlink.c_str(); 1716 1717 if (stat(pkgdir, &s) < 0) { 1718 return error("Failed to stat " + _pkgdir); 1719 } 1720 1721 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) { 1722 return error("Failed to chown " + _pkgdir); 1723 } 1724 1725 if (chmod(pkgdir, 0700) < 0) { 1726 res = error("Failed to chmod " + _pkgdir); 1727 goto out; 1728 } 1729 1730 if (lstat(libsymlink, &libStat) < 0) { 1731 if (errno != ENOENT) { 1732 res = error("Failed to stat " + _libsymlink); 1733 goto out; 1734 } 1735 } else { 1736 if (S_ISDIR(libStat.st_mode)) { 1737 if (delete_dir_contents(libsymlink, 1, NULL) < 0) { 1738 res = error("Failed to delete " + _libsymlink); 1739 goto out; 1740 } 1741 } else if (S_ISLNK(libStat.st_mode)) { 1742 if (unlink(libsymlink) < 0) { 1743 res = error("Failed to unlink " + _libsymlink); 1744 goto out; 1745 } 1746 } 1747 } 1748 1749 if (symlink(asecLibDir, libsymlink) < 0) { 1750 res = error("Failed to symlink " + _libsymlink + " to " + nativeLibPath32); 1751 goto out; 1752 } 1753 1754out: 1755 if (chmod(pkgdir, s.st_mode) < 0) { 1756 auto msg = "Failed to cleanup chmod " + _pkgdir; 1757 if (res.isOk()) { 1758 res = error(msg); 1759 } else { 1760 PLOG(ERROR) << msg; 1761 } 1762 } 1763 1764 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) { 1765 auto msg = "Failed to cleanup chown " + _pkgdir; 1766 if (res.isOk()) { 1767 res = error(msg); 1768 } else { 1769 PLOG(ERROR) << msg; 1770 } 1771 } 1772 1773 return res; 1774} 1775 1776static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd) 1777{ 1778 static const char *IDMAP_BIN = "/system/bin/idmap"; 1779 static const size_t MAX_INT_LEN = 32; 1780 char idmap_str[MAX_INT_LEN]; 1781 1782 snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd); 1783 1784 execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL); 1785 ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno)); 1786} 1787 1788// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix) 1789// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap 1790static int flatten_path(const char *prefix, const char *suffix, 1791 const char *overlay_path, char *idmap_path, size_t N) 1792{ 1793 if (overlay_path == NULL || idmap_path == NULL) { 1794 return -1; 1795 } 1796 const size_t len_overlay_path = strlen(overlay_path); 1797 // will access overlay_path + 1 further below; requires absolute path 1798 if (len_overlay_path < 2 || *overlay_path != '/') { 1799 return -1; 1800 } 1801 const size_t len_idmap_root = strlen(prefix); 1802 const size_t len_suffix = strlen(suffix); 1803 if (SIZE_MAX - len_idmap_root < len_overlay_path || 1804 SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) { 1805 // additions below would cause overflow 1806 return -1; 1807 } 1808 if (N < len_idmap_root + len_overlay_path + len_suffix) { 1809 return -1; 1810 } 1811 memset(idmap_path, 0, N); 1812 snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix); 1813 char *ch = idmap_path + len_idmap_root; 1814 while (*ch != '\0') { 1815 if (*ch == '/') { 1816 *ch = '@'; 1817 } 1818 ++ch; 1819 } 1820 return 0; 1821} 1822 1823binder::Status InstalldNativeService::idmap(const std::string& targetApkPath, 1824 const std::string& overlayApkPath, int32_t uid) { 1825 ENFORCE_UID(AID_SYSTEM); 1826 std::lock_guard<std::recursive_mutex> lock(mLock); 1827 1828 const char* target_apk = targetApkPath.c_str(); 1829 const char* overlay_apk = overlayApkPath.c_str(); 1830 ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid); 1831 1832 int idmap_fd = -1; 1833 char idmap_path[PATH_MAX]; 1834 1835 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1836 idmap_path, sizeof(idmap_path)) == -1) { 1837 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1838 goto fail; 1839 } 1840 1841 unlink(idmap_path); 1842 idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644); 1843 if (idmap_fd < 0) { 1844 ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno)); 1845 goto fail; 1846 } 1847 if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) { 1848 ALOGE("idmap cannot chown '%s'\n", idmap_path); 1849 goto fail; 1850 } 1851 if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { 1852 ALOGE("idmap cannot chmod '%s'\n", idmap_path); 1853 goto fail; 1854 } 1855 1856 pid_t pid; 1857 pid = fork(); 1858 if (pid == 0) { 1859 /* child -- drop privileges before continuing */ 1860 if (setgid(uid) != 0) { 1861 ALOGE("setgid(%d) failed during idmap\n", uid); 1862 exit(1); 1863 } 1864 if (setuid(uid) != 0) { 1865 ALOGE("setuid(%d) failed during idmap\n", uid); 1866 exit(1); 1867 } 1868 if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) { 1869 ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno)); 1870 exit(1); 1871 } 1872 1873 run_idmap(target_apk, overlay_apk, idmap_fd); 1874 exit(1); /* only if exec call to idmap failed */ 1875 } else { 1876 int status = wait_child(pid); 1877 if (status != 0) { 1878 ALOGE("idmap failed, status=0x%04x\n", status); 1879 goto fail; 1880 } 1881 } 1882 1883 close(idmap_fd); 1884 return ok(); 1885fail: 1886 if (idmap_fd >= 0) { 1887 close(idmap_fd); 1888 unlink(idmap_path); 1889 } 1890 return error(); 1891} 1892 1893binder::Status InstalldNativeService::removeIdmap(const std::string& overlayApkPath) { 1894 const char* overlay_apk = overlayApkPath.c_str(); 1895 char idmap_path[PATH_MAX]; 1896 1897 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1898 idmap_path, sizeof(idmap_path)) == -1) { 1899 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1900 return error(); 1901 } 1902 if (unlink(idmap_path) < 0) { 1903 ALOGE("couldn't unlink idmap file %s\n", idmap_path); 1904 return error(); 1905 } 1906 return ok(); 1907} 1908 1909binder::Status InstalldNativeService::restoreconAppData(const std::unique_ptr<std::string>& uuid, 1910 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 1911 const std::string& seInfo) { 1912 ENFORCE_UID(AID_SYSTEM); 1913 CHECK_ARGUMENT_UUID(uuid); 1914 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1915 std::lock_guard<std::recursive_mutex> lock(mLock); 1916 1917 binder::Status res = ok(); 1918 1919 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here. 1920 unsigned int seflags = SELINUX_ANDROID_RESTORECON_RECURSE; 1921 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1922 const char* pkgName = packageName.c_str(); 1923 const char* seinfo = seInfo.c_str(); 1924 1925 uid_t uid = multiuser_get_uid(userId, appId); 1926 if (flags & FLAG_STORAGE_CE) { 1927 auto path = create_data_user_ce_package_path(uuid_, userId, pkgName); 1928 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 1929 res = error("restorecon failed for " + path); 1930 } 1931 } 1932 if (flags & FLAG_STORAGE_DE) { 1933 auto path = create_data_user_de_package_path(uuid_, userId, pkgName); 1934 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 1935 res = error("restorecon failed for " + path); 1936 } 1937 } 1938 return res; 1939} 1940 1941binder::Status InstalldNativeService::createOatDir(const std::string& oatDir, 1942 const std::string& instructionSet) { 1943 ENFORCE_UID(AID_SYSTEM); 1944 std::lock_guard<std::recursive_mutex> lock(mLock); 1945 1946 const char* oat_dir = oatDir.c_str(); 1947 const char* instruction_set = instructionSet.c_str(); 1948 char oat_instr_dir[PKG_PATH_MAX]; 1949 1950 if (validate_apk_path(oat_dir)) { 1951 return error("Invalid path " + oatDir); 1952 } 1953 if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1954 return error("Failed to prepare " + oatDir); 1955 } 1956 if (selinux_android_restorecon(oat_dir, 0)) { 1957 return error("Failed to restorecon " + oatDir); 1958 } 1959 snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set); 1960 if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1961 return error(StringPrintf("Failed to prepare %s", oat_instr_dir)); 1962 } 1963 return ok(); 1964} 1965 1966binder::Status InstalldNativeService::rmPackageDir(const std::string& packageDir) { 1967 ENFORCE_UID(AID_SYSTEM); 1968 std::lock_guard<std::recursive_mutex> lock(mLock); 1969 1970 if (validate_apk_path(packageDir.c_str())) { 1971 return error("Invalid path " + packageDir); 1972 } 1973 if (delete_dir_contents_and_dir(packageDir) != 0) { 1974 return error("Failed to delete " + packageDir); 1975 } 1976 return ok(); 1977} 1978 1979binder::Status InstalldNativeService::linkFile(const std::string& relativePath, 1980 const std::string& fromBase, const std::string& toBase) { 1981 ENFORCE_UID(AID_SYSTEM); 1982 std::lock_guard<std::recursive_mutex> lock(mLock); 1983 1984 const char* relative_path = relativePath.c_str(); 1985 const char* from_base = fromBase.c_str(); 1986 const char* to_base = toBase.c_str(); 1987 char from_path[PKG_PATH_MAX]; 1988 char to_path[PKG_PATH_MAX]; 1989 snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path); 1990 snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path); 1991 1992 if (validate_apk_path_subdirs(from_path)) { 1993 return error(StringPrintf("Invalid from path %s", from_path)); 1994 } 1995 1996 if (validate_apk_path_subdirs(to_path)) { 1997 return error(StringPrintf("Invalid to path %s", to_path)); 1998 } 1999 2000 if (link(from_path, to_path) < 0) { 2001 return error(StringPrintf("Failed to link from %s to %s", from_path, to_path)); 2002 } 2003 2004 return ok(); 2005} 2006 2007binder::Status InstalldNativeService::moveAb(const std::string& apkPath, 2008 const std::string& instructionSet, const std::string& outputPath) { 2009 ENFORCE_UID(AID_SYSTEM); 2010 std::lock_guard<std::recursive_mutex> lock(mLock); 2011 2012 const char* apk_path = apkPath.c_str(); 2013 const char* instruction_set = instructionSet.c_str(); 2014 const char* oat_dir = outputPath.c_str(); 2015 2016 bool success = move_ab(apk_path, instruction_set, oat_dir); 2017 return success ? ok() : error(); 2018} 2019 2020binder::Status InstalldNativeService::deleteOdex(const std::string& apkPath, 2021 const std::string& instructionSet, const std::string& outputPath) { 2022 ENFORCE_UID(AID_SYSTEM); 2023 std::lock_guard<std::recursive_mutex> lock(mLock); 2024 2025 const char* apk_path = apkPath.c_str(); 2026 const char* instruction_set = instructionSet.c_str(); 2027 const char* oat_dir = outputPath.c_str(); 2028 2029 bool res = delete_odex(apk_path, instruction_set, oat_dir); 2030 return res ? ok() : error(); 2031} 2032 2033binder::Status InstalldNativeService::invalidateMounts() { 2034 ENFORCE_UID(AID_SYSTEM); 2035 std::lock_guard<std::recursive_mutex> lock(mLock); 2036 2037 mQuotaDevices.clear(); 2038 2039 std::ifstream in("/proc/mounts"); 2040 if (!in.is_open()) { 2041 return error("Failed to read mounts"); 2042 } 2043 2044 std::string source; 2045 std::string target; 2046 std::string ignored; 2047 struct dqblk dq; 2048 while (!in.eof()) { 2049 std::getline(in, source, ' '); 2050 std::getline(in, target, ' '); 2051 std::getline(in, ignored); 2052 2053 if (source.compare(0, 11, "/dev/block/") == 0) { 2054 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), source.c_str(), 0, 2055 reinterpret_cast<char*>(&dq)) == 0) { 2056 LOG(DEBUG) << "Found " << source << " with quota"; 2057 mQuotaDevices[target] = source; 2058 } 2059 } 2060 } 2061 return ok(); 2062} 2063 2064std::string InstalldNativeService::findQuotaDeviceForUuid( 2065 const std::unique_ptr<std::string>& uuid) { 2066 auto path = create_data_path(uuid ? uuid->c_str() : nullptr); 2067 return mQuotaDevices[path]; 2068} 2069 2070} // namespace installd 2071} // namespace android 2072