InstalldNativeService.cpp revision 7bf5b9532e192e846be3a31f28171cdba0f3c830
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 char* PKG_LIB_POSTFIX = "/lib"; 76static constexpr const char* CACHE_DIR_POSTFIX = "/cache"; 77static constexpr const char* CODE_CACHE_DIR_POSTFIX = "/code_cache"; 78 79static constexpr const char* IDMAP_PREFIX = "/data/resource-cache/"; 80static constexpr const char* IDMAP_SUFFIX = "@idmap"; 81 82// NOTE: keep in sync with StorageManager 83static constexpr int FLAG_STORAGE_DE = 1 << 0; 84static constexpr int FLAG_STORAGE_CE = 1 << 1; 85 86// NOTE: keep in sync with Installer 87static constexpr int FLAG_CLEAR_CACHE_ONLY = 1 << 8; 88static constexpr int FLAG_CLEAR_CODE_CACHE_ONLY = 1 << 9; 89static constexpr int FLAG_USE_QUOTA = 1 << 12; 90static constexpr int FLAG_FREE_CACHE_V2 = 1 << 13; 91static constexpr int FLAG_FREE_CACHE_NOOP = 1 << 14; 92 93#define MIN_RESTRICTED_HOME_SDK_VERSION 24 // > M 94namespace { 95 96constexpr const char* kDump = "android.permission.DUMP"; 97 98static binder::Status ok() { 99 return binder::Status::ok(); 100} 101 102static binder::Status exception(uint32_t code, const std::string& msg) { 103 return binder::Status::fromExceptionCode(code, String8(msg.c_str())); 104} 105 106static binder::Status error() { 107 return binder::Status::fromServiceSpecificError(errno); 108} 109 110static binder::Status error(const std::string& msg) { 111 PLOG(ERROR) << msg; 112 return binder::Status::fromServiceSpecificError(errno, String8(msg.c_str())); 113} 114 115static binder::Status error(uint32_t code, const std::string& msg) { 116 LOG(ERROR) << msg << " (" << code << ")"; 117 return binder::Status::fromServiceSpecificError(code, String8(msg.c_str())); 118} 119 120binder::Status checkPermission(const char* permission) { 121 pid_t pid; 122 uid_t uid; 123 124 if (checkCallingPermission(String16(permission), reinterpret_cast<int32_t*>(&pid), 125 reinterpret_cast<int32_t*>(&uid))) { 126 return ok(); 127 } else { 128 return exception(binder::Status::EX_SECURITY, 129 StringPrintf("UID %d / PID %d lacks permission %s", uid, pid, permission)); 130 } 131} 132 133binder::Status checkUid(uid_t expectedUid) { 134 uid_t uid = IPCThreadState::self()->getCallingUid(); 135 if (uid == expectedUid || uid == AID_ROOT) { 136 return ok(); 137 } else { 138 return exception(binder::Status::EX_SECURITY, 139 StringPrintf("UID %d is not expected UID %d", uid, expectedUid)); 140 } 141} 142 143binder::Status checkArgumentUuid(const std::unique_ptr<std::string>& uuid) { 144 if (!uuid || is_valid_filename(*uuid)) { 145 return ok(); 146 } else { 147 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 148 StringPrintf("UUID %s is malformed", uuid->c_str())); 149 } 150} 151 152binder::Status checkArgumentPackageName(const std::string& packageName) { 153 if (is_valid_package_name(packageName.c_str())) { 154 return ok(); 155 } else { 156 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 157 StringPrintf("Package name %s is malformed", packageName.c_str())); 158 } 159} 160 161#define ENFORCE_UID(uid) { \ 162 binder::Status status = checkUid((uid)); \ 163 if (!status.isOk()) { \ 164 return status; \ 165 } \ 166} 167 168#define CHECK_ARGUMENT_UUID(uuid) { \ 169 binder::Status status = checkArgumentUuid((uuid)); \ 170 if (!status.isOk()) { \ 171 return status; \ 172 } \ 173} 174 175#define CHECK_ARGUMENT_PACKAGE_NAME(packageName) { \ 176 binder::Status status = \ 177 checkArgumentPackageName((packageName)); \ 178 if (!status.isOk()) { \ 179 return status; \ 180 } \ 181} 182 183} // namespace 184 185status_t InstalldNativeService::start() { 186 IPCThreadState::self()->disableBackgroundScheduling(true); 187 status_t ret = BinderService<InstalldNativeService>::publish(); 188 if (ret != android::OK) { 189 return ret; 190 } 191 sp<ProcessState> ps(ProcessState::self()); 192 ps->startThreadPool(); 193 ps->giveThreadPoolName(); 194 return android::OK; 195} 196 197status_t InstalldNativeService::dump(int fd, const Vector<String16> & /* args */) { 198 auto out = std::fstream(StringPrintf("/proc/self/fd/%d", fd)); 199 const binder::Status dump_permission = checkPermission(kDump); 200 if (!dump_permission.isOk()) { 201 out << dump_permission.toString8() << endl; 202 return PERMISSION_DENIED; 203 } 204 std::lock_guard<std::recursive_mutex> lock(mLock); 205 206 out << "installd is happy!" << endl; 207 208 out << endl << "Devices with quota support:" << endl; 209 for (const auto& n : mQuotaDevices) { 210 out << " " << n.first << " = " << n.second << endl; 211 } 212 213 out << endl << "Per-UID cache quotas:" << endl; 214 for (const auto& n : mCacheQuotas) { 215 out << " " << n.first << " = " << n.second << endl; 216 } 217 218 out << endl; 219 out.flush(); 220 221 return NO_ERROR; 222} 223 224/** 225 * Perform restorecon of the given path, but only perform recursive restorecon 226 * if the label of that top-level file actually changed. This can save us 227 * significant time by avoiding no-op traversals of large filesystem trees. 228 */ 229static int restorecon_app_data_lazy(const std::string& path, const std::string& seInfo, uid_t uid, 230 bool existing) { 231 int res = 0; 232 char* before = nullptr; 233 char* after = nullptr; 234 235 // Note that SELINUX_ANDROID_RESTORECON_DATADATA flag is set by 236 // libselinux. Not needed here. 237 238 if (lgetfilecon(path.c_str(), &before) < 0) { 239 PLOG(ERROR) << "Failed before getfilecon for " << path; 240 goto fail; 241 } 242 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 0) < 0) { 243 PLOG(ERROR) << "Failed top-level restorecon for " << path; 244 goto fail; 245 } 246 if (lgetfilecon(path.c_str(), &after) < 0) { 247 PLOG(ERROR) << "Failed after getfilecon for " << path; 248 goto fail; 249 } 250 251 // If the initial top-level restorecon above changed the label, then go 252 // back and restorecon everything recursively 253 if (strcmp(before, after)) { 254 if (existing) { 255 LOG(DEBUG) << "Detected label change from " << before << " to " << after << " at " 256 << path << "; running recursive restorecon"; 257 } 258 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 259 SELINUX_ANDROID_RESTORECON_RECURSE) < 0) { 260 PLOG(ERROR) << "Failed recursive restorecon for " << path; 261 goto fail; 262 } 263 } 264 265 goto done; 266fail: 267 res = -1; 268done: 269 free(before); 270 free(after); 271 return res; 272} 273 274static int restorecon_app_data_lazy(const std::string& parent, const char* name, 275 const std::string& seInfo, uid_t uid, bool existing) { 276 return restorecon_app_data_lazy(StringPrintf("%s/%s", parent.c_str(), name), seInfo, uid, 277 existing); 278} 279 280static int prepare_app_dir(const std::string& path, mode_t target_mode, uid_t uid) { 281 if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, uid) != 0) { 282 PLOG(ERROR) << "Failed to prepare " << path; 283 return -1; 284 } 285 return 0; 286} 287 288/** 289 * Prepare an app cache directory, which offers to fix-up the GID and 290 * directory mode flags during a platform upgrade. 291 */ 292static int prepare_app_cache_dir(const std::string& parent, const char* name, mode_t target_mode, 293 uid_t uid, gid_t gid) { 294 auto path = StringPrintf("%s/%s", parent.c_str(), name); 295 struct stat st; 296 if (stat(path.c_str(), &st) != 0) { 297 if (errno == ENOENT) { 298 // This is fine, just create it 299 if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, gid) != 0) { 300 PLOG(ERROR) << "Failed to prepare " << path; 301 return -1; 302 } else { 303 return 0; 304 } 305 } else { 306 PLOG(ERROR) << "Failed to stat " << path; 307 return -1; 308 } 309 } 310 311 mode_t actual_mode = st.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO | S_ISGID); 312 if (st.st_uid != uid) { 313 // Mismatched UID is real trouble; we can't recover 314 LOG(ERROR) << "Mismatched UID at " << path << ": found " << st.st_uid 315 << " but expected " << uid; 316 return -1; 317 } else if (st.st_gid == gid && actual_mode == target_mode) { 318 // Everything looks good! 319 return 0; 320 } 321 322 // Directory is owned correctly, but GID or mode mismatch means it's 323 // probably a platform upgrade so we need to fix them 324 FTS *fts; 325 FTSENT *p; 326 char *argv[] = { (char*) path.c_str(), nullptr }; 327 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 328 PLOG(ERROR) << "Failed to fts_open " << path; 329 return -1; 330 } 331 while ((p = fts_read(fts)) != NULL) { 332 switch (p->fts_info) { 333 case FTS_DP: 334 if (chmod(p->fts_accpath, target_mode) != 0) { 335 PLOG(WARNING) << "Failed to chmod " << p->fts_path; 336 } 337 // Intentional fall through to also set GID 338 case FTS_F: 339 if (chown(p->fts_accpath, -1, gid) != 0) { 340 PLOG(WARNING) << "Failed to chown " << p->fts_path; 341 } 342 break; 343 case FTS_SL: 344 case FTS_SLNONE: 345 if (lchown(p->fts_accpath, -1, gid) != 0) { 346 PLOG(WARNING) << "Failed to chown " << p->fts_path; 347 } 348 break; 349 } 350 } 351 fts_close(fts); 352 return 0; 353} 354 355binder::Status InstalldNativeService::createAppData(const std::unique_ptr<std::string>& uuid, 356 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 357 const std::string& seInfo, int32_t targetSdkVersion, int64_t* _aidl_return) { 358 ENFORCE_UID(AID_SYSTEM); 359 CHECK_ARGUMENT_UUID(uuid); 360 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 361 std::lock_guard<std::recursive_mutex> lock(mLock); 362 363 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 364 const char* pkgname = packageName.c_str(); 365 366 // Assume invalid inode unless filled in below 367 if (_aidl_return != nullptr) *_aidl_return = -1; 368 369 int32_t uid = multiuser_get_uid(userId, appId); 370 int32_t cacheGid = multiuser_get_cache_gid(userId, appId); 371 mode_t targetMode = targetSdkVersion >= MIN_RESTRICTED_HOME_SDK_VERSION ? 0700 : 0751; 372 373 // If UID doesn't have a specific cache GID, use UID value 374 if (cacheGid == -1) { 375 cacheGid = uid; 376 } 377 378 if (flags & FLAG_STORAGE_CE) { 379 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname); 380 bool existing = (access(path.c_str(), F_OK) == 0); 381 382 if (prepare_app_dir(path, targetMode, uid) || 383 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 384 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 385 return error("Failed to prepare " + path); 386 } 387 388 // Consider restorecon over contents if label changed 389 if (restorecon_app_data_lazy(path, seInfo, uid, existing) || 390 restorecon_app_data_lazy(path, "cache", seInfo, uid, existing) || 391 restorecon_app_data_lazy(path, "code_cache", seInfo, uid, existing)) { 392 return error("Failed to restorecon " + path); 393 } 394 395 // Remember inode numbers of cache directories so that we can clear 396 // contents while CE storage is locked 397 if (write_path_inode(path, "cache", kXattrInodeCache) || 398 write_path_inode(path, "code_cache", kXattrInodeCodeCache)) { 399 return error("Failed to write_path_inode for " + path); 400 } 401 402 // And return the CE inode of the top-level data directory so we can 403 // clear contents while CE storage is locked 404 if ((_aidl_return != nullptr) 405 && get_path_inode(path, reinterpret_cast<ino_t*>(_aidl_return)) != 0) { 406 return error("Failed to get_path_inode for " + path); 407 } 408 } 409 if (flags & FLAG_STORAGE_DE) { 410 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 411 bool existing = (access(path.c_str(), F_OK) == 0); 412 413 if (prepare_app_dir(path, targetMode, uid) || 414 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 415 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 416 return error("Failed to prepare " + path); 417 } 418 419 // Consider restorecon over contents if label changed 420 if (restorecon_app_data_lazy(path, seInfo, uid, existing)) { 421 return error("Failed to restorecon " + path); 422 } 423 424 if (property_get_bool("dalvik.vm.usejitprofiles", false)) { 425 const std::string profile_path = create_data_user_profile_package_path(userId, pkgname); 426 // read-write-execute only for the app user. 427 if (fs_prepare_dir_strict(profile_path.c_str(), 0700, uid, uid) != 0) { 428 return error("Failed to prepare " + profile_path); 429 } 430 std::string profile_file = create_primary_profile(profile_path); 431 // read-write only for the app user. 432 if (fs_prepare_file_strict(profile_file.c_str(), 0600, uid, uid) != 0) { 433 return error("Failed to prepare " + profile_path); 434 } 435 const std::string ref_profile_path = create_data_ref_profile_package_path(pkgname); 436 // dex2oat/profman runs under the shared app gid and it needs to read/write reference 437 // profiles. 438 int shared_app_gid = multiuser_get_shared_gid(0, appId); 439 if ((shared_app_gid != -1) && fs_prepare_dir_strict( 440 ref_profile_path.c_str(), 0700, shared_app_gid, shared_app_gid) != 0) { 441 return error("Failed to prepare " + ref_profile_path); 442 } 443 } 444 } 445 return ok(); 446} 447 448binder::Status InstalldNativeService::migrateAppData(const std::unique_ptr<std::string>& uuid, 449 const std::string& packageName, int32_t userId, int32_t flags) { 450 ENFORCE_UID(AID_SYSTEM); 451 CHECK_ARGUMENT_UUID(uuid); 452 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 453 std::lock_guard<std::recursive_mutex> lock(mLock); 454 455 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 456 const char* pkgname = packageName.c_str(); 457 458 // This method only exists to upgrade system apps that have requested 459 // forceDeviceEncrypted, so their default storage always lives in a 460 // consistent location. This only works on non-FBE devices, since we 461 // never want to risk exposing data on a device with real CE/DE storage. 462 463 auto ce_path = create_data_user_ce_package_path(uuid_, userId, pkgname); 464 auto de_path = create_data_user_de_package_path(uuid_, userId, pkgname); 465 466 // If neither directory is marked as default, assume CE is default 467 if (getxattr(ce_path.c_str(), kXattrDefault, nullptr, 0) == -1 468 && getxattr(de_path.c_str(), kXattrDefault, nullptr, 0) == -1) { 469 if (setxattr(ce_path.c_str(), kXattrDefault, nullptr, 0, 0) != 0) { 470 return error("Failed to mark default storage " + ce_path); 471 } 472 } 473 474 // Migrate default data location if needed 475 auto target = (flags & FLAG_STORAGE_DE) ? de_path : ce_path; 476 auto source = (flags & FLAG_STORAGE_DE) ? ce_path : de_path; 477 478 if (getxattr(target.c_str(), kXattrDefault, nullptr, 0) == -1) { 479 LOG(WARNING) << "Requested default storage " << target 480 << " is not active; migrating from " << source; 481 if (delete_dir_contents_and_dir(target) != 0) { 482 return error("Failed to delete " + target); 483 } 484 if (rename(source.c_str(), target.c_str()) != 0) { 485 return error("Failed to rename " + source + " to " + target); 486 } 487 } 488 489 return ok(); 490} 491 492 493binder::Status InstalldNativeService::clearAppProfiles(const std::string& packageName) { 494 ENFORCE_UID(AID_SYSTEM); 495 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 496 std::lock_guard<std::recursive_mutex> lock(mLock); 497 498 const char* pkgname = packageName.c_str(); 499 binder::Status res = ok(); 500 if (!clear_reference_profile(pkgname)) { 501 res = error("Failed to clear reference profile for " + packageName); 502 } 503 if (!clear_current_profiles(pkgname)) { 504 res = error("Failed to clear current profiles for " + packageName); 505 } 506 return res; 507} 508 509binder::Status InstalldNativeService::clearAppData(const std::unique_ptr<std::string>& uuid, 510 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 511 ENFORCE_UID(AID_SYSTEM); 512 CHECK_ARGUMENT_UUID(uuid); 513 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 514 std::lock_guard<std::recursive_mutex> lock(mLock); 515 516 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 517 const char* pkgname = packageName.c_str(); 518 519 binder::Status res = ok(); 520 if (flags & FLAG_STORAGE_CE) { 521 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 522 if (flags & FLAG_CLEAR_CACHE_ONLY) { 523 path = read_path_inode(path, "cache", kXattrInodeCache); 524 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 525 path = read_path_inode(path, "code_cache", kXattrInodeCodeCache); 526 } 527 if (access(path.c_str(), F_OK) == 0) { 528 if (delete_dir_contents(path) != 0) { 529 res = error("Failed to delete contents of " + path); 530 } 531 } 532 } 533 if (flags & FLAG_STORAGE_DE) { 534 std::string suffix = ""; 535 bool only_cache = false; 536 if (flags & FLAG_CLEAR_CACHE_ONLY) { 537 suffix = CACHE_DIR_POSTFIX; 538 only_cache = true; 539 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 540 suffix = CODE_CACHE_DIR_POSTFIX; 541 only_cache = true; 542 } 543 544 auto path = create_data_user_de_package_path(uuid_, userId, pkgname) + suffix; 545 if (access(path.c_str(), F_OK) == 0) { 546 if (delete_dir_contents(path) != 0) { 547 res = error("Failed to delete contents of " + path); 548 } 549 } 550 if (!only_cache) { 551 if (!clear_current_profile(pkgname, userId)) { 552 res = error("Failed to clear current profile for " + packageName); 553 } 554 } 555 } 556 return res; 557} 558 559static int destroy_app_reference_profile(const char *pkgname) { 560 return delete_dir_contents_and_dir( 561 create_data_ref_profile_package_path(pkgname), 562 /*ignore_if_missing*/ true); 563} 564 565static int destroy_app_current_profiles(const char *pkgname, userid_t userid) { 566 return delete_dir_contents_and_dir( 567 create_data_user_profile_package_path(userid, pkgname), 568 /*ignore_if_missing*/ true); 569} 570 571binder::Status InstalldNativeService::destroyAppProfiles(const std::string& packageName) { 572 ENFORCE_UID(AID_SYSTEM); 573 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 574 std::lock_guard<std::recursive_mutex> lock(mLock); 575 576 const char* pkgname = packageName.c_str(); 577 binder::Status res = ok(); 578 std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr); 579 for (auto user : users) { 580 if (destroy_app_current_profiles(pkgname, user) != 0) { 581 res = error("Failed to destroy current profiles for " + packageName); 582 } 583 } 584 if (destroy_app_reference_profile(pkgname) != 0) { 585 res = error("Failed to destroy reference profile for " + packageName); 586 } 587 return res; 588} 589 590binder::Status InstalldNativeService::destroyAppData(const std::unique_ptr<std::string>& uuid, 591 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 592 ENFORCE_UID(AID_SYSTEM); 593 CHECK_ARGUMENT_UUID(uuid); 594 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 595 std::lock_guard<std::recursive_mutex> lock(mLock); 596 597 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 598 const char* pkgname = packageName.c_str(); 599 600 binder::Status res = ok(); 601 if (flags & FLAG_STORAGE_CE) { 602 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 603 if (delete_dir_contents_and_dir(path) != 0) { 604 res = error("Failed to delete " + path); 605 } 606 } 607 if (flags & FLAG_STORAGE_DE) { 608 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 609 if (delete_dir_contents_and_dir(path) != 0) { 610 res = error("Failed to delete " + path); 611 } 612 destroy_app_current_profiles(pkgname, userId); 613 // TODO(calin): If the package is still installed by other users it's probably 614 // beneficial to keep the reference profile around. 615 // Verify if it's ok to do that. 616 destroy_app_reference_profile(pkgname); 617 } 618 return res; 619} 620 621binder::Status InstalldNativeService::moveCompleteApp(const std::unique_ptr<std::string>& fromUuid, 622 const std::unique_ptr<std::string>& toUuid, const std::string& packageName, 623 const std::string& dataAppName, int32_t appId, const std::string& seInfo, 624 int32_t targetSdkVersion) { 625 ENFORCE_UID(AID_SYSTEM); 626 CHECK_ARGUMENT_UUID(fromUuid); 627 CHECK_ARGUMENT_UUID(toUuid); 628 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 629 std::lock_guard<std::recursive_mutex> lock(mLock); 630 631 const char* from_uuid = fromUuid ? fromUuid->c_str() : nullptr; 632 const char* to_uuid = toUuid ? toUuid->c_str() : nullptr; 633 const char* package_name = packageName.c_str(); 634 const char* data_app_name = dataAppName.c_str(); 635 636 binder::Status res = ok(); 637 std::vector<userid_t> users = get_known_users(from_uuid); 638 639 // Copy app 640 { 641 auto from = create_data_app_package_path(from_uuid, data_app_name); 642 auto to = create_data_app_package_path(to_uuid, data_app_name); 643 auto to_parent = create_data_app_path(to_uuid); 644 645 char *argv[] = { 646 (char*) kCpPath, 647 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 648 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 649 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 650 (char*) "-P", /* Do not follow symlinks [default] */ 651 (char*) "-d", /* don't dereference symlinks */ 652 (char*) from.c_str(), 653 (char*) to_parent.c_str() 654 }; 655 656 LOG(DEBUG) << "Copying " << from << " to " << to; 657 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 658 if (rc != 0) { 659 res = error(rc, "Failed copying " + from + " to " + to); 660 goto fail; 661 } 662 663 if (selinux_android_restorecon(to.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) { 664 res = error("Failed to restorecon " + to); 665 goto fail; 666 } 667 } 668 669 // Copy private data for all known users 670 for (auto user : users) { 671 672 // Data source may not exist for all users; that's okay 673 auto from_ce = create_data_user_ce_package_path(from_uuid, user, package_name); 674 if (access(from_ce.c_str(), F_OK) != 0) { 675 LOG(INFO) << "Missing source " << from_ce; 676 continue; 677 } 678 679 if (!createAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, appId, 680 seInfo, targetSdkVersion, nullptr).isOk()) { 681 res = error("Failed to create package target"); 682 goto fail; 683 } 684 685 char *argv[] = { 686 (char*) kCpPath, 687 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 688 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 689 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 690 (char*) "-P", /* Do not follow symlinks [default] */ 691 (char*) "-d", /* don't dereference symlinks */ 692 nullptr, 693 nullptr 694 }; 695 696 { 697 auto from = create_data_user_de_package_path(from_uuid, user, package_name); 698 auto to = create_data_user_de_path(to_uuid, user); 699 argv[6] = (char*) from.c_str(); 700 argv[7] = (char*) to.c_str(); 701 702 LOG(DEBUG) << "Copying " << from << " to " << to; 703 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 704 if (rc != 0) { 705 res = error(rc, "Failed copying " + from + " to " + to); 706 goto fail; 707 } 708 } 709 { 710 auto from = create_data_user_ce_package_path(from_uuid, user, package_name); 711 auto to = create_data_user_ce_path(to_uuid, user); 712 argv[6] = (char*) from.c_str(); 713 argv[7] = (char*) to.c_str(); 714 715 LOG(DEBUG) << "Copying " << from << " to " << to; 716 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 717 if (rc != 0) { 718 res = error(rc, "Failed copying " + from + " to " + to); 719 goto fail; 720 } 721 } 722 723 if (!restoreconAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, 724 appId, seInfo).isOk()) { 725 res = error("Failed to restorecon"); 726 goto fail; 727 } 728 } 729 730 // We let the framework scan the new location and persist that before 731 // deleting the data in the old location; this ordering ensures that 732 // we can recover from things like battery pulls. 733 return ok(); 734 735fail: 736 // Nuke everything we might have already copied 737 { 738 auto to = create_data_app_package_path(to_uuid, data_app_name); 739 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 740 LOG(WARNING) << "Failed to rollback " << to; 741 } 742 } 743 for (auto user : users) { 744 { 745 auto to = create_data_user_de_package_path(to_uuid, user, package_name); 746 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 747 LOG(WARNING) << "Failed to rollback " << to; 748 } 749 } 750 { 751 auto to = create_data_user_ce_package_path(to_uuid, user, package_name); 752 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 753 LOG(WARNING) << "Failed to rollback " << to; 754 } 755 } 756 } 757 return res; 758} 759 760binder::Status InstalldNativeService::createUserData(const std::unique_ptr<std::string>& uuid, 761 int32_t userId, int32_t userSerial ATTRIBUTE_UNUSED, int32_t flags) { 762 ENFORCE_UID(AID_SYSTEM); 763 CHECK_ARGUMENT_UUID(uuid); 764 std::lock_guard<std::recursive_mutex> lock(mLock); 765 766 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 767 if (flags & FLAG_STORAGE_DE) { 768 if (uuid_ == nullptr) { 769 if (ensure_config_user_dirs(userId) != 0) { 770 return error(StringPrintf("Failed to ensure dirs for %d", userId)); 771 } 772 } 773 } 774 return ok(); 775} 776 777binder::Status InstalldNativeService::destroyUserData(const std::unique_ptr<std::string>& uuid, 778 int32_t userId, int32_t flags) { 779 ENFORCE_UID(AID_SYSTEM); 780 CHECK_ARGUMENT_UUID(uuid); 781 std::lock_guard<std::recursive_mutex> lock(mLock); 782 783 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 784 binder::Status res = ok(); 785 if (flags & FLAG_STORAGE_DE) { 786 auto path = create_data_user_de_path(uuid_, userId); 787 if (delete_dir_contents_and_dir(path, true) != 0) { 788 res = error("Failed to delete " + path); 789 } 790 if (uuid_ == nullptr) { 791 path = create_data_misc_legacy_path(userId); 792 if (delete_dir_contents_and_dir(path, true) != 0) { 793 res = error("Failed to delete " + path); 794 } 795 path = create_data_user_profile_path(userId); 796 if (delete_dir_contents_and_dir(path, true) != 0) { 797 res = error("Failed to delete " + path); 798 } 799 } 800 } 801 if (flags & FLAG_STORAGE_CE) { 802 auto path = create_data_user_ce_path(uuid_, userId); 803 if (delete_dir_contents_and_dir(path, true) != 0) { 804 res = error("Failed to delete " + path); 805 } 806 path = create_data_media_path(uuid_, userId); 807 if (delete_dir_contents_and_dir(path, true) != 0) { 808 res = error("Failed to delete " + path); 809 } 810 } 811 return res; 812} 813 814/* Try to ensure free_size bytes of storage are available. 815 * Returns 0 on success. 816 * This is rather simple-minded because doing a full LRU would 817 * be potentially memory-intensive, and without atime it would 818 * also require that apps constantly modify file metadata even 819 * when just reading from the cache, which is pretty awful. 820 */ 821binder::Status InstalldNativeService::freeCache(const std::unique_ptr<std::string>& uuid, 822 int64_t freeStorageSize, int32_t flags) { 823 ENFORCE_UID(AID_SYSTEM); 824 CHECK_ARGUMENT_UUID(uuid); 825 std::lock_guard<std::recursive_mutex> lock(mLock); 826 827 // TODO: remove this once framework is more robust 828 invalidateMounts(); 829 830 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 831 auto data_path = create_data_path(uuid_); 832 auto device = findQuotaDeviceForUuid(uuid); 833 auto noop = (flags & FLAG_FREE_CACHE_NOOP); 834 835 int64_t free = data_disk_free(data_path); 836 int64_t needed = freeStorageSize - free; 837 if (free < 0) { 838 return error("Failed to determine free space for " + data_path); 839 } else if (free >= freeStorageSize) { 840 return ok(); 841 } 842 843 LOG(DEBUG) << "Found " << data_path << " with " << free << " free; caller requested " 844 << freeStorageSize; 845 846 if (flags & FLAG_FREE_CACHE_V2) { 847 // This new cache strategy fairly removes files from UIDs by deleting 848 // files from the UIDs which are most over their allocated quota 849 850 // 1. Create trackers for every known UID 851 ATRACE_BEGIN("create"); 852 std::unordered_map<uid_t, std::shared_ptr<CacheTracker>> trackers; 853 for (auto user : get_known_users(uuid_)) { 854 FTS *fts; 855 FTSENT *p; 856 char *argv[] = { 857 (char*) create_data_user_ce_path(uuid_, user).c_str(), 858 (char*) create_data_user_de_path(uuid_, user).c_str(), 859 nullptr 860 }; 861 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 862 return error("Failed to fts_open"); 863 } 864 while ((p = fts_read(fts)) != NULL) { 865 if (p->fts_info == FTS_D && p->fts_level == 1) { 866 uid_t uid = p->fts_statp->st_uid; 867 auto search = trackers.find(uid); 868 if (search != trackers.end()) { 869 search->second->addDataPath(p->fts_path); 870 } else { 871 auto tracker = std::shared_ptr<CacheTracker>(new CacheTracker( 872 multiuser_get_user_id(uid), multiuser_get_app_id(uid), device)); 873 tracker->addDataPath(p->fts_path); 874 tracker->cacheQuota = mCacheQuotas[uid]; 875 if (tracker->cacheQuota == 0) { 876 LOG(WARNING) << "UID " << uid << " has no cache quota; assuming 64MB"; 877 tracker->cacheQuota = 67108864; 878 } 879 trackers[uid] = tracker; 880 } 881 fts_set(fts, p, FTS_SKIP); 882 } 883 } 884 fts_close(fts); 885 } 886 ATRACE_END(); 887 888 // 2. Populate tracker stats and insert into priority queue 889 ATRACE_BEGIN("populate"); 890 auto cmp = [](std::shared_ptr<CacheTracker> left, std::shared_ptr<CacheTracker> right) { 891 return (left->getCacheRatio() < right->getCacheRatio()); 892 }; 893 std::priority_queue<std::shared_ptr<CacheTracker>, 894 std::vector<std::shared_ptr<CacheTracker>>, decltype(cmp)> queue(cmp); 895 for (const auto& it : trackers) { 896 it.second->loadStats(); 897 queue.push(it.second); 898 } 899 ATRACE_END(); 900 901 // 3. Bounce across the queue, freeing items from whichever tracker is 902 // the most over their assigned quota 903 ATRACE_BEGIN("bounce"); 904 std::shared_ptr<CacheTracker> active; 905 while (active || !queue.empty()) { 906 // Find the best tracker to work with; this might involve swapping 907 // if the active tracker is no longer the most over quota 908 bool nextBetter = active && !queue.empty() 909 && active->getCacheRatio() < queue.top()->getCacheRatio(); 910 if (!active || nextBetter) { 911 if (active) { 912 // Current tracker still has items, so we'll consider it 913 // again later once it bubbles up to surface 914 queue.push(active); 915 } 916 active = queue.top(); queue.pop(); 917 active->ensureItems(); 918 continue; 919 } 920 921 // If no items remain, go find another tracker 922 if (active->items.empty()) { 923 active = nullptr; 924 continue; 925 } else { 926 auto item = active->items.back(); 927 active->items.pop_back(); 928 929 LOG(DEBUG) << "Purging " << item->toString() << " from " << active->toString(); 930 if (!noop) { 931 item->purge(); 932 } 933 active->cacheUsed -= item->size; 934 needed -= item->size; 935 } 936 937 // Verify that we're actually done before bailing, since sneaky 938 // apps might be using hardlinks 939 if (needed <= 0) { 940 free = data_disk_free(data_path); 941 needed = freeStorageSize - free; 942 if (needed <= 0) { 943 break; 944 } else { 945 LOG(WARNING) << "Expected to be done but still need " << needed; 946 } 947 } 948 } 949 ATRACE_END(); 950 951 } else { 952 ATRACE_BEGIN("start"); 953 cache_t* cache = start_cache_collection(); 954 ATRACE_END(); 955 956 ATRACE_BEGIN("add"); 957 for (auto user : get_known_users(uuid_)) { 958 add_cache_files(cache, create_data_user_ce_path(uuid_, user)); 959 add_cache_files(cache, create_data_user_de_path(uuid_, user)); 960 add_cache_files(cache, 961 StringPrintf("%s/Android/data", create_data_media_path(uuid_, user).c_str())); 962 } 963 ATRACE_END(); 964 965 ATRACE_BEGIN("clear"); 966 clear_cache_files(data_path, cache, freeStorageSize); 967 ATRACE_END(); 968 969 ATRACE_BEGIN("finish"); 970 finish_cache_collection(cache); 971 ATRACE_END(); 972 } 973 974 free = data_disk_free(data_path); 975 if (free >= freeStorageSize) { 976 return ok(); 977 } else { 978 return error(StringPrintf("Failed to free up %" PRId64 " on %s; final free space %" PRId64, 979 freeStorageSize, data_path.c_str(), free)); 980 } 981} 982 983binder::Status InstalldNativeService::rmdex(const std::string& codePath, 984 const std::string& instructionSet) { 985 ENFORCE_UID(AID_SYSTEM); 986 std::lock_guard<std::recursive_mutex> lock(mLock); 987 988 char dex_path[PKG_PATH_MAX]; 989 990 const char* path = codePath.c_str(); 991 const char* instruction_set = instructionSet.c_str(); 992 993 if (validate_apk_path(path) && validate_system_app_path(path)) { 994 return error("Invalid path " + codePath); 995 } 996 997 if (!create_cache_path(dex_path, path, instruction_set)) { 998 return error("Failed to create cache path for " + codePath); 999 } 1000 1001 ALOGV("unlink %s\n", dex_path); 1002 if (unlink(dex_path) < 0) { 1003 return error(StringPrintf("Failed to unlink %s", dex_path)); 1004 } else { 1005 return ok(); 1006 } 1007} 1008 1009struct stats { 1010 int64_t codeSize; 1011 int64_t dataSize; 1012 int64_t cacheSize; 1013}; 1014 1015#if MEASURE_DEBUG 1016static std::string toString(std::vector<int64_t> values) { 1017 std::stringstream res; 1018 res << "["; 1019 for (size_t i = 0; i < values.size(); i++) { 1020 res << values[i]; 1021 if (i < values.size() - 1) { 1022 res << ","; 1023 } 1024 } 1025 res << "]"; 1026 return res.str(); 1027} 1028#endif 1029 1030static void collectQuotaStats(const std::string& device, int32_t userId, 1031 int32_t appId, struct stats* stats, struct stats* extStats) { 1032 if (device.empty()) return; 1033 1034 struct dqblk dq; 1035 1036 uid_t uid = multiuser_get_uid(userId, appId); 1037 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1038 reinterpret_cast<char*>(&dq)) != 0) { 1039 if (errno != ESRCH) { 1040 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1041 } 1042 } else { 1043#if MEASURE_DEBUG 1044 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1045#endif 1046 stats->dataSize += dq.dqb_curspace; 1047 } 1048 1049 int cacheGid = multiuser_get_cache_gid(userId, appId); 1050 if (cacheGid != -1) { 1051 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), cacheGid, 1052 reinterpret_cast<char*>(&dq)) != 0) { 1053 if (errno != ESRCH) { 1054 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << cacheGid; 1055 } 1056 } else { 1057#if MEASURE_DEBUG 1058 LOG(DEBUG) << "quotactl() for GID " << cacheGid << " " << dq.dqb_curspace; 1059#endif 1060 stats->cacheSize += dq.dqb_curspace; 1061 } 1062 } 1063 1064 int extGid = multiuser_get_ext_gid(userId, appId); 1065 if (extGid != -1) { 1066 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), extGid, 1067 reinterpret_cast<char*>(&dq)) != 0) { 1068 if (errno != ESRCH) { 1069 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << extGid; 1070 } 1071 } else { 1072#if MEASURE_DEBUG 1073 LOG(DEBUG) << "quotactl() for GID " << extGid << " " << dq.dqb_curspace; 1074#endif 1075 extStats->dataSize += dq.dqb_curspace; 1076 } 1077 } 1078 1079 int sharedGid = multiuser_get_shared_gid(userId, appId); 1080 if (sharedGid != -1) { 1081 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), sharedGid, 1082 reinterpret_cast<char*>(&dq)) != 0) { 1083 if (errno != ESRCH) { 1084 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << sharedGid; 1085 } 1086 } else { 1087#if MEASURE_DEBUG 1088 LOG(DEBUG) << "quotactl() for GID " << sharedGid << " " << dq.dqb_curspace; 1089#endif 1090 stats->codeSize += dq.dqb_curspace; 1091 } 1092 } 1093} 1094 1095static void collectManualStats(const std::string& path, struct stats* stats) { 1096 DIR *d; 1097 int dfd; 1098 struct dirent *de; 1099 struct stat s; 1100 1101 d = opendir(path.c_str()); 1102 if (d == nullptr) { 1103 if (errno != ENOENT) { 1104 PLOG(WARNING) << "Failed to open " << path; 1105 } 1106 return; 1107 } 1108 dfd = dirfd(d); 1109 while ((de = readdir(d))) { 1110 const char *name = de->d_name; 1111 1112 int64_t size = 0; 1113 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 1114 size = s.st_blocks * 512; 1115 } 1116 1117 if (de->d_type == DT_DIR) { 1118 if (!strcmp(name, ".")) { 1119 // Don't recurse, but still count node size 1120 } else if (!strcmp(name, "..")) { 1121 // Don't recurse or count node size 1122 continue; 1123 } else { 1124 // Measure all children nodes 1125 size = 0; 1126 calculate_tree_size(StringPrintf("%s/%s", path.c_str(), name), &size); 1127 } 1128 1129 if (!strcmp(name, "cache") || !strcmp(name, "code_cache")) { 1130 stats->cacheSize += size; 1131 } 1132 } 1133 1134 // Legacy symlink isn't owned by app 1135 if (de->d_type == DT_LNK && !strcmp(name, "lib")) { 1136 continue; 1137 } 1138 1139 // Everything found inside is considered data 1140 stats->dataSize += size; 1141 } 1142 closedir(d); 1143} 1144 1145static void collectManualStatsForUser(const std::string& path, struct stats* stats, 1146 bool exclude_apps = false) { 1147 DIR *d; 1148 int dfd; 1149 struct dirent *de; 1150 struct stat s; 1151 1152 d = opendir(path.c_str()); 1153 if (d == nullptr) { 1154 if (errno != ENOENT) { 1155 PLOG(WARNING) << "Failed to open " << path; 1156 } 1157 return; 1158 } 1159 dfd = dirfd(d); 1160 while ((de = readdir(d))) { 1161 if (de->d_type == DT_DIR) { 1162 const char *name = de->d_name; 1163 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) != 0) { 1164 continue; 1165 } 1166 if (!strcmp(name, ".") || !strcmp(name, "..")) { 1167 continue; 1168 } else if (exclude_apps && (s.st_uid >= AID_APP_START && s.st_uid <= AID_APP_END)) { 1169 continue; 1170 } else { 1171 collectManualStats(StringPrintf("%s/%s", path.c_str(), name), stats); 1172 } 1173 } 1174 } 1175 closedir(d); 1176} 1177 1178static void collectManualExternalStatsForUser(const std::string& path, struct stats* stats) { 1179 FTS *fts; 1180 FTSENT *p; 1181 char *argv[] = { (char*) path.c_str(), nullptr }; 1182 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 1183 PLOG(ERROR) << "Failed to fts_open " << path; 1184 return; 1185 } 1186 while ((p = fts_read(fts)) != NULL) { 1187 switch (p->fts_info) { 1188 case FTS_D: 1189 if (p->fts_level == 4 1190 && !strcmp(p->fts_name, "cache") 1191 && !strcmp(p->fts_parent->fts_parent->fts_name, "data") 1192 && !strcmp(p->fts_parent->fts_parent->fts_parent->fts_name, "Android")) { 1193 p->fts_number = 1; 1194 } 1195 p->fts_number = p->fts_parent->fts_number; 1196 // Fall through to count the directory 1197 case FTS_DEFAULT: 1198 case FTS_F: 1199 case FTS_SL: 1200 case FTS_SLNONE: 1201 int64_t size = (p->fts_statp->st_blocks * 512); 1202 if (p->fts_number == 1) { 1203 stats->cacheSize += size; 1204 } 1205 stats->dataSize += size; 1206 break; 1207 } 1208 } 1209 fts_close(fts); 1210} 1211 1212binder::Status InstalldNativeService::getAppSize(const std::unique_ptr<std::string>& uuid, 1213 const std::vector<std::string>& packageNames, int32_t userId, int32_t flags, 1214 int32_t appId, const std::vector<int64_t>& ceDataInodes, 1215 const std::vector<std::string>& codePaths, std::vector<int64_t>* _aidl_return) { 1216 ENFORCE_UID(AID_SYSTEM); 1217 CHECK_ARGUMENT_UUID(uuid); 1218 for (auto packageName : packageNames) { 1219 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1220 } 1221 std::lock_guard<std::recursive_mutex> lock(mLock); 1222 1223 // When modifying this logic, always verify using tests: 1224 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetAppSize 1225 1226#if MEASURE_DEBUG 1227 LOG(INFO) << "Measuring user " << userId << " app " << appId; 1228#endif 1229 1230 // Here's a summary of the common storage locations across the platform, 1231 // and how they're each tagged: 1232 // 1233 // /data/app/com.example UID system 1234 // /data/app/com.example/oat UID system 1235 // /data/user/0/com.example UID u0_a10 GID u0_a10 1236 // /data/user/0/com.example/cache UID u0_a10 GID u0_a10_cache 1237 // /data/media/0/foo.txt UID u0_media_rw 1238 // /data/media/0/bar.jpg UID u0_media_rw GID u0_media_image 1239 // /data/media/0/Android/data/com.example UID u0_media_rw GID u0_a10_ext 1240 // /data/media/0/Android/data/com.example/cache UID u0_media_rw GID u0_a10_ext_cache 1241 // /data/media/obb/com.example UID system 1242 1243 struct stats stats; 1244 struct stats extStats; 1245 memset(&stats, 0, sizeof(stats)); 1246 memset(&extStats, 0, sizeof(extStats)); 1247 1248 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1249 1250 auto device = findQuotaDeviceForUuid(uuid); 1251 if (device.empty()) { 1252 flags &= ~FLAG_USE_QUOTA; 1253 } 1254 1255 ATRACE_BEGIN("obb"); 1256 for (auto packageName : packageNames) { 1257 auto obbCodePath = create_data_media_obb_path(uuid_, packageName.c_str()); 1258 calculate_tree_size(obbCodePath, &extStats.codeSize); 1259 } 1260 ATRACE_END(); 1261 1262 if (flags & FLAG_USE_QUOTA && appId >= AID_APP_START) { 1263 ATRACE_BEGIN("code"); 1264 for (auto codePath : codePaths) { 1265 calculate_tree_size(codePath, &stats.codeSize, -1, 1266 multiuser_get_shared_gid(userId, appId)); 1267 } 1268 ATRACE_END(); 1269 1270 ATRACE_BEGIN("quota"); 1271 collectQuotaStats(device, userId, appId, &stats, &extStats); 1272 ATRACE_END(); 1273 1274 } else { 1275 ATRACE_BEGIN("code"); 1276 for (auto codePath : codePaths) { 1277 calculate_tree_size(codePath, &stats.codeSize); 1278 } 1279 ATRACE_END(); 1280 1281 for (size_t i = 0; i < packageNames.size(); i++) { 1282 const char* pkgname = packageNames[i].c_str(); 1283 1284 ATRACE_BEGIN("data"); 1285 auto cePath = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInodes[i]); 1286 collectManualStats(cePath, &stats); 1287 auto dePath = create_data_user_de_package_path(uuid_, userId, pkgname); 1288 collectManualStats(dePath, &stats); 1289 ATRACE_END(); 1290 1291 ATRACE_BEGIN("profiles"); 1292 auto userProfilePath = create_data_user_profile_package_path(userId, pkgname); 1293 calculate_tree_size(userProfilePath, &stats.dataSize); 1294 auto refProfilePath = create_data_ref_profile_package_path(pkgname); 1295 calculate_tree_size(refProfilePath, &stats.codeSize); 1296 ATRACE_END(); 1297 1298 ATRACE_BEGIN("external"); 1299 auto extPath = create_data_media_package_path(uuid_, userId, pkgname, "data"); 1300 collectManualStats(extPath, &extStats); 1301 auto mediaPath = create_data_media_package_path(uuid_, userId, pkgname, "media"); 1302 calculate_tree_size(mediaPath, &extStats.dataSize); 1303 ATRACE_END(); 1304 } 1305 1306 ATRACE_BEGIN("dalvik"); 1307 int32_t sharedGid = multiuser_get_shared_gid(userId, appId); 1308 if (sharedGid != -1) { 1309 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1310 sharedGid, -1); 1311 } 1312 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize, 1313 multiuser_get_uid(userId, appId), -1); 1314 ATRACE_END(); 1315 } 1316 1317 std::vector<int64_t> ret; 1318 ret.push_back(stats.codeSize); 1319 ret.push_back(stats.dataSize); 1320 ret.push_back(stats.cacheSize); 1321 ret.push_back(extStats.codeSize); 1322 ret.push_back(extStats.dataSize); 1323 ret.push_back(extStats.cacheSize); 1324#if MEASURE_DEBUG 1325 LOG(DEBUG) << "Final result " << toString(ret); 1326#endif 1327 *_aidl_return = ret; 1328 return ok(); 1329} 1330 1331binder::Status InstalldNativeService::getUserSize(const std::unique_ptr<std::string>& uuid, 1332 int32_t userId, int32_t flags, const std::vector<int32_t>& appIds, 1333 std::vector<int64_t>* _aidl_return) { 1334 ENFORCE_UID(AID_SYSTEM); 1335 CHECK_ARGUMENT_UUID(uuid); 1336 std::lock_guard<std::recursive_mutex> lock(mLock); 1337 1338 // When modifying this logic, always verify using tests: 1339 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetUserSize 1340 1341#if MEASURE_DEBUG 1342 LOG(INFO) << "Measuring user " << userId; 1343#endif 1344 1345 struct stats stats; 1346 struct stats extStats; 1347 memset(&stats, 0, sizeof(stats)); 1348 memset(&extStats, 0, sizeof(extStats)); 1349 1350 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1351 1352 auto device = findQuotaDeviceForUuid(uuid); 1353 if (device.empty()) { 1354 flags &= ~FLAG_USE_QUOTA; 1355 } 1356 1357 if (flags & FLAG_USE_QUOTA) { 1358 struct dqblk dq; 1359 1360 ATRACE_BEGIN("obb"); 1361 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), AID_MEDIA_OBB, 1362 reinterpret_cast<char*>(&dq)) != 0) { 1363 if (errno != ESRCH) { 1364 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << AID_MEDIA_OBB; 1365 } 1366 } else { 1367#if MEASURE_DEBUG 1368 LOG(DEBUG) << "quotactl() for GID " << AID_MEDIA_OBB << " " << dq.dqb_curspace; 1369#endif 1370 extStats.codeSize += dq.dqb_curspace; 1371 } 1372 ATRACE_END(); 1373 1374 ATRACE_BEGIN("code"); 1375 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize, -1, -1, true); 1376 ATRACE_END(); 1377 1378 ATRACE_BEGIN("data"); 1379 auto cePath = create_data_user_ce_path(uuid_, userId); 1380 collectManualStatsForUser(cePath, &stats, true); 1381 auto dePath = create_data_user_de_path(uuid_, userId); 1382 collectManualStatsForUser(dePath, &stats, true); 1383 ATRACE_END(); 1384 1385 ATRACE_BEGIN("profile"); 1386 auto userProfilePath = create_data_user_profile_path(userId); 1387 calculate_tree_size(userProfilePath, &stats.dataSize, -1, -1, true); 1388 auto refProfilePath = create_data_ref_profile_path(); 1389 calculate_tree_size(refProfilePath, &stats.codeSize, -1, -1, true); 1390 ATRACE_END(); 1391 1392 ATRACE_BEGIN("external"); 1393 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1394 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1395 reinterpret_cast<char*>(&dq)) != 0) { 1396 if (errno != ESRCH) { 1397 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1398 } 1399 } else { 1400#if MEASURE_DEBUG 1401 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1402#endif 1403 extStats.dataSize += dq.dqb_curspace; 1404 } 1405 ATRACE_END(); 1406 1407 ATRACE_BEGIN("dalvik"); 1408 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1409 -1, -1, true); 1410 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize, 1411 -1, -1, true); 1412 ATRACE_END(); 1413 1414 ATRACE_BEGIN("quota"); 1415 for (auto appId : appIds) { 1416 if (appId >= AID_APP_START) { 1417 collectQuotaStats(device, userId, appId, &stats, &extStats); 1418#if MEASURE_DEBUG 1419 // Sleep to make sure we don't lose logs 1420 usleep(1); 1421#endif 1422 } 1423 } 1424 ATRACE_END(); 1425 } else { 1426 ATRACE_BEGIN("obb"); 1427 auto obbPath = create_data_path(uuid_) + "/media/obb"; 1428 calculate_tree_size(obbPath, &extStats.codeSize); 1429 ATRACE_END(); 1430 1431 ATRACE_BEGIN("code"); 1432 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize); 1433 ATRACE_END(); 1434 1435 ATRACE_BEGIN("data"); 1436 auto cePath = create_data_user_ce_path(uuid_, userId); 1437 collectManualStatsForUser(cePath, &stats); 1438 auto dePath = create_data_user_de_path(uuid_, userId); 1439 collectManualStatsForUser(dePath, &stats); 1440 ATRACE_END(); 1441 1442 ATRACE_BEGIN("profile"); 1443 auto userProfilePath = create_data_user_profile_path(userId); 1444 calculate_tree_size(userProfilePath, &stats.dataSize); 1445 auto refProfilePath = create_data_ref_profile_path(); 1446 calculate_tree_size(refProfilePath, &stats.codeSize); 1447 ATRACE_END(); 1448 1449 ATRACE_BEGIN("external"); 1450 auto dataMediaPath = create_data_media_path(uuid_, userId); 1451 collectManualExternalStatsForUser(dataMediaPath, &extStats); 1452#if MEASURE_DEBUG 1453 LOG(DEBUG) << "Measured external data " << extStats.dataSize << " cache " 1454 << extStats.cacheSize; 1455#endif 1456 ATRACE_END(); 1457 1458 ATRACE_BEGIN("dalvik"); 1459 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize); 1460 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize); 1461 ATRACE_END(); 1462 } 1463 1464 std::vector<int64_t> ret; 1465 ret.push_back(stats.codeSize); 1466 ret.push_back(stats.dataSize); 1467 ret.push_back(stats.cacheSize); 1468 ret.push_back(extStats.codeSize); 1469 ret.push_back(extStats.dataSize); 1470 ret.push_back(extStats.cacheSize); 1471#if MEASURE_DEBUG 1472 LOG(DEBUG) << "Final result " << toString(ret); 1473#endif 1474 *_aidl_return = ret; 1475 return ok(); 1476} 1477 1478binder::Status InstalldNativeService::getExternalSize(const std::unique_ptr<std::string>& uuid, 1479 int32_t userId, int32_t flags, std::vector<int64_t>* _aidl_return) { 1480 ENFORCE_UID(AID_SYSTEM); 1481 CHECK_ARGUMENT_UUID(uuid); 1482 std::lock_guard<std::recursive_mutex> lock(mLock); 1483 1484 // When modifying this logic, always verify using tests: 1485 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetExternalSize 1486 1487#if MEASURE_DEBUG 1488 LOG(INFO) << "Measuring external " << userId; 1489#endif 1490 1491 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1492 1493 int64_t totalSize = 0; 1494 int64_t audioSize = 0; 1495 int64_t videoSize = 0; 1496 int64_t imageSize = 0; 1497 1498 auto device = findQuotaDeviceForUuid(uuid); 1499 if (device.empty()) { 1500 flags &= ~FLAG_USE_QUOTA; 1501 } 1502 1503 if (flags & FLAG_USE_QUOTA) { 1504 struct dqblk dq; 1505 1506 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1507 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1508 reinterpret_cast<char*>(&dq)) != 0) { 1509 if (errno != ESRCH) { 1510 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1511 } 1512 } else { 1513#if MEASURE_DEBUG 1514 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1515#endif 1516 totalSize = dq.dqb_curspace; 1517 } 1518 1519 gid_t audioGid = multiuser_get_uid(userId, AID_MEDIA_AUDIO); 1520 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), audioGid, 1521 reinterpret_cast<char*>(&dq)) == 0) { 1522#if MEASURE_DEBUG 1523 LOG(DEBUG) << "quotactl() for GID " << audioGid << " " << dq.dqb_curspace; 1524#endif 1525 audioSize = dq.dqb_curspace; 1526 } 1527 gid_t videoGid = multiuser_get_uid(userId, AID_MEDIA_VIDEO); 1528 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), videoGid, 1529 reinterpret_cast<char*>(&dq)) == 0) { 1530#if MEASURE_DEBUG 1531 LOG(DEBUG) << "quotactl() for GID " << videoGid << " " << dq.dqb_curspace; 1532#endif 1533 videoSize = dq.dqb_curspace; 1534 } 1535 gid_t imageGid = multiuser_get_uid(userId, AID_MEDIA_IMAGE); 1536 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), imageGid, 1537 reinterpret_cast<char*>(&dq)) == 0) { 1538#if MEASURE_DEBUG 1539 LOG(DEBUG) << "quotactl() for GID " << imageGid << " " << dq.dqb_curspace; 1540#endif 1541 imageSize = dq.dqb_curspace; 1542 } 1543 } else { 1544 FTS *fts; 1545 FTSENT *p; 1546 auto path = create_data_media_path(uuid_, userId); 1547 char *argv[] = { (char*) path.c_str(), nullptr }; 1548 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 1549 return error("Failed to fts_open " + path); 1550 } 1551 while ((p = fts_read(fts)) != NULL) { 1552 char* ext; 1553 int64_t size = (p->fts_statp->st_blocks * 512); 1554 switch (p->fts_info) { 1555 case FTS_F: 1556 // Only categorize files not belonging to apps 1557 if (p->fts_statp->st_gid < AID_APP_START) { 1558 ext = strrchr(p->fts_name, '.'); 1559 if (ext != nullptr) { 1560 switch (MatchExtension(++ext)) { 1561 case AID_MEDIA_AUDIO: audioSize += size; break; 1562 case AID_MEDIA_VIDEO: videoSize += size; break; 1563 case AID_MEDIA_IMAGE: imageSize += size; break; 1564 } 1565 } 1566 } 1567 // Fall through to always count against total 1568 case FTS_D: 1569 case FTS_DEFAULT: 1570 case FTS_SL: 1571 case FTS_SLNONE: 1572 totalSize += size; 1573 break; 1574 } 1575 } 1576 fts_close(fts); 1577 } 1578 1579 std::vector<int64_t> ret; 1580 ret.push_back(totalSize); 1581 ret.push_back(audioSize); 1582 ret.push_back(videoSize); 1583 ret.push_back(imageSize); 1584#if MEASURE_DEBUG 1585 LOG(DEBUG) << "Final result " << toString(ret); 1586#endif 1587 *_aidl_return = ret; 1588 return ok(); 1589} 1590 1591binder::Status InstalldNativeService::setAppQuota(const std::unique_ptr<std::string>& uuid, 1592 int32_t userId, int32_t appId, int64_t cacheQuota) { 1593 ENFORCE_UID(AID_SYSTEM); 1594 CHECK_ARGUMENT_UUID(uuid); 1595 std::lock_guard<std::recursive_mutex> lock(mLock); 1596 1597 int32_t uid = multiuser_get_uid(userId, appId); 1598 mCacheQuotas[uid] = cacheQuota; 1599 1600 return ok(); 1601} 1602 1603// Dumps the contents of a profile file, using pkgname's dex files for pretty 1604// printing the result. 1605binder::Status InstalldNativeService::dumpProfiles(int32_t uid, const std::string& packageName, 1606 const std::string& codePaths, bool* _aidl_return) { 1607 ENFORCE_UID(AID_SYSTEM); 1608 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1609 std::lock_guard<std::recursive_mutex> lock(mLock); 1610 1611 const char* pkgname = packageName.c_str(); 1612 const char* code_paths = codePaths.c_str(); 1613 1614 *_aidl_return = dump_profiles(uid, pkgname, code_paths); 1615 return ok(); 1616} 1617 1618// TODO: Consider returning error codes. 1619binder::Status InstalldNativeService::mergeProfiles(int32_t uid, const std::string& packageName, 1620 bool* _aidl_return) { 1621 ENFORCE_UID(AID_SYSTEM); 1622 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1623 std::lock_guard<std::recursive_mutex> lock(mLock); 1624 1625 const char* pkgname = packageName.c_str(); 1626 *_aidl_return = analyse_profiles(uid, pkgname); 1627 return ok(); 1628} 1629 1630binder::Status InstalldNativeService::dexopt(const std::string& apkPath, int32_t uid, 1631 const std::unique_ptr<std::string>& packageName, const std::string& instructionSet, 1632 int32_t dexoptNeeded, const std::unique_ptr<std::string>& outputPath, int32_t dexFlags, 1633 const std::string& compilerFilter, const std::unique_ptr<std::string>& uuid, 1634 const std::unique_ptr<std::string>& sharedLibraries) { 1635 ENFORCE_UID(AID_SYSTEM); 1636 CHECK_ARGUMENT_UUID(uuid); 1637 if (packageName && *packageName != "*") { 1638 CHECK_ARGUMENT_PACKAGE_NAME(*packageName); 1639 } 1640 std::lock_guard<std::recursive_mutex> lock(mLock); 1641 1642 const char* apk_path = apkPath.c_str(); 1643 const char* pkgname = packageName ? packageName->c_str() : "*"; 1644 const char* instruction_set = instructionSet.c_str(); 1645 const char* oat_dir = outputPath ? outputPath->c_str() : nullptr; 1646 const char* compiler_filter = compilerFilter.c_str(); 1647 const char* volume_uuid = uuid ? uuid->c_str() : nullptr; 1648 const char* shared_libraries = sharedLibraries ? sharedLibraries->c_str() : nullptr; 1649 1650 int res = android::installd::dexopt(apk_path, uid, pkgname, instruction_set, dexoptNeeded, 1651 oat_dir, dexFlags, compiler_filter, volume_uuid, shared_libraries); 1652 return res ? error(res, "Failed to dexopt") : ok(); 1653} 1654 1655binder::Status InstalldNativeService::markBootComplete(const std::string& instructionSet) { 1656 ENFORCE_UID(AID_SYSTEM); 1657 std::lock_guard<std::recursive_mutex> lock(mLock); 1658 1659 const char* instruction_set = instructionSet.c_str(); 1660 1661 char boot_marker_path[PKG_PATH_MAX]; 1662 sprintf(boot_marker_path, 1663 "%s/%s/%s/.booting", 1664 android_data_dir.path, 1665 DALVIK_CACHE, 1666 instruction_set); 1667 1668 ALOGV("mark_boot_complete : %s", boot_marker_path); 1669 if (unlink(boot_marker_path) != 0) { 1670 return error(StringPrintf("Failed to unlink %s", boot_marker_path)); 1671 } 1672 return ok(); 1673} 1674 1675void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid, 1676 struct stat* statbuf) 1677{ 1678 while (path[basepos] != 0) { 1679 if (path[basepos] == '/') { 1680 path[basepos] = 0; 1681 if (lstat(path, statbuf) < 0) { 1682 ALOGV("Making directory: %s\n", path); 1683 if (mkdir(path, mode) == 0) { 1684 chown(path, uid, gid); 1685 } else { 1686 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno)); 1687 } 1688 } 1689 path[basepos] = '/'; 1690 basepos++; 1691 } 1692 basepos++; 1693 } 1694} 1695 1696binder::Status InstalldNativeService::linkNativeLibraryDirectory( 1697 const std::unique_ptr<std::string>& uuid, const std::string& packageName, 1698 const std::string& nativeLibPath32, int32_t userId) { 1699 ENFORCE_UID(AID_SYSTEM); 1700 CHECK_ARGUMENT_UUID(uuid); 1701 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1702 std::lock_guard<std::recursive_mutex> lock(mLock); 1703 1704 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1705 const char* pkgname = packageName.c_str(); 1706 const char* asecLibDir = nativeLibPath32.c_str(); 1707 struct stat s, libStat; 1708 binder::Status res = ok(); 1709 1710 auto _pkgdir = create_data_user_ce_package_path(uuid_, userId, pkgname); 1711 auto _libsymlink = _pkgdir + PKG_LIB_POSTFIX; 1712 1713 const char* pkgdir = _pkgdir.c_str(); 1714 const char* libsymlink = _libsymlink.c_str(); 1715 1716 if (stat(pkgdir, &s) < 0) { 1717 return error("Failed to stat " + _pkgdir); 1718 } 1719 1720 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) { 1721 return error("Failed to chown " + _pkgdir); 1722 } 1723 1724 if (chmod(pkgdir, 0700) < 0) { 1725 res = error("Failed to chmod " + _pkgdir); 1726 goto out; 1727 } 1728 1729 if (lstat(libsymlink, &libStat) < 0) { 1730 if (errno != ENOENT) { 1731 res = error("Failed to stat " + _libsymlink); 1732 goto out; 1733 } 1734 } else { 1735 if (S_ISDIR(libStat.st_mode)) { 1736 if (delete_dir_contents(libsymlink, 1, NULL) < 0) { 1737 res = error("Failed to delete " + _libsymlink); 1738 goto out; 1739 } 1740 } else if (S_ISLNK(libStat.st_mode)) { 1741 if (unlink(libsymlink) < 0) { 1742 res = error("Failed to unlink " + _libsymlink); 1743 goto out; 1744 } 1745 } 1746 } 1747 1748 if (symlink(asecLibDir, libsymlink) < 0) { 1749 res = error("Failed to symlink " + _libsymlink + " to " + nativeLibPath32); 1750 goto out; 1751 } 1752 1753out: 1754 if (chmod(pkgdir, s.st_mode) < 0) { 1755 auto msg = "Failed to cleanup chmod " + _pkgdir; 1756 if (res.isOk()) { 1757 res = error(msg); 1758 } else { 1759 PLOG(ERROR) << msg; 1760 } 1761 } 1762 1763 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) { 1764 auto msg = "Failed to cleanup chown " + _pkgdir; 1765 if (res.isOk()) { 1766 res = error(msg); 1767 } else { 1768 PLOG(ERROR) << msg; 1769 } 1770 } 1771 1772 return res; 1773} 1774 1775static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd) 1776{ 1777 static const char *IDMAP_BIN = "/system/bin/idmap"; 1778 static const size_t MAX_INT_LEN = 32; 1779 char idmap_str[MAX_INT_LEN]; 1780 1781 snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd); 1782 1783 execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL); 1784 ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno)); 1785} 1786 1787// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix) 1788// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap 1789static int flatten_path(const char *prefix, const char *suffix, 1790 const char *overlay_path, char *idmap_path, size_t N) 1791{ 1792 if (overlay_path == NULL || idmap_path == NULL) { 1793 return -1; 1794 } 1795 const size_t len_overlay_path = strlen(overlay_path); 1796 // will access overlay_path + 1 further below; requires absolute path 1797 if (len_overlay_path < 2 || *overlay_path != '/') { 1798 return -1; 1799 } 1800 const size_t len_idmap_root = strlen(prefix); 1801 const size_t len_suffix = strlen(suffix); 1802 if (SIZE_MAX - len_idmap_root < len_overlay_path || 1803 SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) { 1804 // additions below would cause overflow 1805 return -1; 1806 } 1807 if (N < len_idmap_root + len_overlay_path + len_suffix) { 1808 return -1; 1809 } 1810 memset(idmap_path, 0, N); 1811 snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix); 1812 char *ch = idmap_path + len_idmap_root; 1813 while (*ch != '\0') { 1814 if (*ch == '/') { 1815 *ch = '@'; 1816 } 1817 ++ch; 1818 } 1819 return 0; 1820} 1821 1822binder::Status InstalldNativeService::idmap(const std::string& targetApkPath, 1823 const std::string& overlayApkPath, int32_t uid) { 1824 ENFORCE_UID(AID_SYSTEM); 1825 std::lock_guard<std::recursive_mutex> lock(mLock); 1826 1827 const char* target_apk = targetApkPath.c_str(); 1828 const char* overlay_apk = overlayApkPath.c_str(); 1829 ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid); 1830 1831 int idmap_fd = -1; 1832 char idmap_path[PATH_MAX]; 1833 1834 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1835 idmap_path, sizeof(idmap_path)) == -1) { 1836 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1837 goto fail; 1838 } 1839 1840 unlink(idmap_path); 1841 idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644); 1842 if (idmap_fd < 0) { 1843 ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno)); 1844 goto fail; 1845 } 1846 if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) { 1847 ALOGE("idmap cannot chown '%s'\n", idmap_path); 1848 goto fail; 1849 } 1850 if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { 1851 ALOGE("idmap cannot chmod '%s'\n", idmap_path); 1852 goto fail; 1853 } 1854 1855 pid_t pid; 1856 pid = fork(); 1857 if (pid == 0) { 1858 /* child -- drop privileges before continuing */ 1859 if (setgid(uid) != 0) { 1860 ALOGE("setgid(%d) failed during idmap\n", uid); 1861 exit(1); 1862 } 1863 if (setuid(uid) != 0) { 1864 ALOGE("setuid(%d) failed during idmap\n", uid); 1865 exit(1); 1866 } 1867 if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) { 1868 ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno)); 1869 exit(1); 1870 } 1871 1872 run_idmap(target_apk, overlay_apk, idmap_fd); 1873 exit(1); /* only if exec call to idmap failed */ 1874 } else { 1875 int status = wait_child(pid); 1876 if (status != 0) { 1877 ALOGE("idmap failed, status=0x%04x\n", status); 1878 goto fail; 1879 } 1880 } 1881 1882 close(idmap_fd); 1883 return ok(); 1884fail: 1885 if (idmap_fd >= 0) { 1886 close(idmap_fd); 1887 unlink(idmap_path); 1888 } 1889 return error(); 1890} 1891 1892binder::Status InstalldNativeService::restoreconAppData(const std::unique_ptr<std::string>& uuid, 1893 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 1894 const std::string& seInfo) { 1895 ENFORCE_UID(AID_SYSTEM); 1896 CHECK_ARGUMENT_UUID(uuid); 1897 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1898 std::lock_guard<std::recursive_mutex> lock(mLock); 1899 1900 binder::Status res = ok(); 1901 1902 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here. 1903 unsigned int seflags = SELINUX_ANDROID_RESTORECON_RECURSE; 1904 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1905 const char* pkgName = packageName.c_str(); 1906 const char* seinfo = seInfo.c_str(); 1907 1908 uid_t uid = multiuser_get_uid(userId, appId); 1909 if (flags & FLAG_STORAGE_CE) { 1910 auto path = create_data_user_ce_package_path(uuid_, userId, pkgName); 1911 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 1912 res = error("restorecon failed for " + path); 1913 } 1914 } 1915 if (flags & FLAG_STORAGE_DE) { 1916 auto path = create_data_user_de_package_path(uuid_, userId, pkgName); 1917 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 1918 res = error("restorecon failed for " + path); 1919 } 1920 } 1921 return res; 1922} 1923 1924binder::Status InstalldNativeService::createOatDir(const std::string& oatDir, 1925 const std::string& instructionSet) { 1926 ENFORCE_UID(AID_SYSTEM); 1927 std::lock_guard<std::recursive_mutex> lock(mLock); 1928 1929 const char* oat_dir = oatDir.c_str(); 1930 const char* instruction_set = instructionSet.c_str(); 1931 char oat_instr_dir[PKG_PATH_MAX]; 1932 1933 if (validate_apk_path(oat_dir)) { 1934 return error("Invalid path " + oatDir); 1935 } 1936 if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1937 return error("Failed to prepare " + oatDir); 1938 } 1939 if (selinux_android_restorecon(oat_dir, 0)) { 1940 return error("Failed to restorecon " + oatDir); 1941 } 1942 snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set); 1943 if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1944 return error(StringPrintf("Failed to prepare %s", oat_instr_dir)); 1945 } 1946 return ok(); 1947} 1948 1949binder::Status InstalldNativeService::rmPackageDir(const std::string& packageDir) { 1950 ENFORCE_UID(AID_SYSTEM); 1951 std::lock_guard<std::recursive_mutex> lock(mLock); 1952 1953 if (validate_apk_path(packageDir.c_str())) { 1954 return error("Invalid path " + packageDir); 1955 } 1956 if (delete_dir_contents_and_dir(packageDir) != 0) { 1957 return error("Failed to delete " + packageDir); 1958 } 1959 return ok(); 1960} 1961 1962binder::Status InstalldNativeService::linkFile(const std::string& relativePath, 1963 const std::string& fromBase, const std::string& toBase) { 1964 ENFORCE_UID(AID_SYSTEM); 1965 std::lock_guard<std::recursive_mutex> lock(mLock); 1966 1967 const char* relative_path = relativePath.c_str(); 1968 const char* from_base = fromBase.c_str(); 1969 const char* to_base = toBase.c_str(); 1970 char from_path[PKG_PATH_MAX]; 1971 char to_path[PKG_PATH_MAX]; 1972 snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path); 1973 snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path); 1974 1975 if (validate_apk_path_subdirs(from_path)) { 1976 return error(StringPrintf("Invalid from path %s", from_path)); 1977 } 1978 1979 if (validate_apk_path_subdirs(to_path)) { 1980 return error(StringPrintf("Invalid to path %s", to_path)); 1981 } 1982 1983 if (link(from_path, to_path) < 0) { 1984 return error(StringPrintf("Failed to link from %s to %s", from_path, to_path)); 1985 } 1986 1987 return ok(); 1988} 1989 1990binder::Status InstalldNativeService::moveAb(const std::string& apkPath, 1991 const std::string& instructionSet, const std::string& outputPath) { 1992 ENFORCE_UID(AID_SYSTEM); 1993 std::lock_guard<std::recursive_mutex> lock(mLock); 1994 1995 const char* apk_path = apkPath.c_str(); 1996 const char* instruction_set = instructionSet.c_str(); 1997 const char* oat_dir = outputPath.c_str(); 1998 1999 bool success = move_ab(apk_path, instruction_set, oat_dir); 2000 return success ? ok() : error(); 2001} 2002 2003binder::Status InstalldNativeService::deleteOdex(const std::string& apkPath, 2004 const std::string& instructionSet, const std::string& outputPath) { 2005 ENFORCE_UID(AID_SYSTEM); 2006 std::lock_guard<std::recursive_mutex> lock(mLock); 2007 2008 const char* apk_path = apkPath.c_str(); 2009 const char* instruction_set = instructionSet.c_str(); 2010 const char* oat_dir = outputPath.c_str(); 2011 2012 bool res = delete_odex(apk_path, instruction_set, oat_dir); 2013 return res ? ok() : error(); 2014} 2015 2016binder::Status InstalldNativeService::invalidateMounts() { 2017 ENFORCE_UID(AID_SYSTEM); 2018 std::lock_guard<std::recursive_mutex> lock(mLock); 2019 2020 mQuotaDevices.clear(); 2021 2022 std::ifstream in("/proc/mounts"); 2023 if (!in.is_open()) { 2024 return error("Failed to read mounts"); 2025 } 2026 2027 std::string source; 2028 std::string target; 2029 std::string ignored; 2030 struct dqblk dq; 2031 while (!in.eof()) { 2032 std::getline(in, source, ' '); 2033 std::getline(in, target, ' '); 2034 std::getline(in, ignored); 2035 2036 if (source.compare(0, 11, "/dev/block/") == 0) { 2037 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), source.c_str(), 0, 2038 reinterpret_cast<char*>(&dq)) == 0) { 2039 LOG(DEBUG) << "Found " << source << " with quota"; 2040 mQuotaDevices[target] = source; 2041 } 2042 } 2043 } 2044 return ok(); 2045} 2046 2047std::string InstalldNativeService::findQuotaDeviceForUuid( 2048 const std::unique_ptr<std::string>& uuid) { 2049 auto path = create_data_path(uuid ? uuid->c_str() : nullptr); 2050 return mQuotaDevices[path]; 2051} 2052 2053} // namespace installd 2054} // namespace android 2055