InstalldNativeService.cpp revision e12d5964a8d14abe7f2eb6e57469cbe7f7391a19
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 Installer 85static constexpr int FLAG_CLEAR_CACHE_ONLY = 1 << 8; 86static constexpr int FLAG_CLEAR_CODE_CACHE_ONLY = 1 << 9; 87static constexpr int FLAG_USE_QUOTA = 1 << 12; 88static constexpr int FLAG_FREE_CACHE_V2 = 1 << 13; 89static constexpr int FLAG_FREE_CACHE_V2_DEFY_QUOTA = 1 << 14; 90static constexpr int FLAG_FREE_CACHE_NOOP = 1 << 15; 91static constexpr int FLAG_FORCE = 1 << 16; 92 93namespace { 94 95constexpr const char* kDump = "android.permission.DUMP"; 96 97static binder::Status ok() { 98 return binder::Status::ok(); 99} 100 101static binder::Status exception(uint32_t code, const std::string& msg) { 102 return binder::Status::fromExceptionCode(code, String8(msg.c_str())); 103} 104 105static binder::Status error() { 106 return binder::Status::fromServiceSpecificError(errno); 107} 108 109static binder::Status error(const std::string& msg) { 110 PLOG(ERROR) << msg; 111 return binder::Status::fromServiceSpecificError(errno, String8(msg.c_str())); 112} 113 114static binder::Status error(uint32_t code, const std::string& msg) { 115 LOG(ERROR) << msg << " (" << code << ")"; 116 return binder::Status::fromServiceSpecificError(code, String8(msg.c_str())); 117} 118 119binder::Status checkPermission(const char* permission) { 120 pid_t pid; 121 uid_t uid; 122 123 if (checkCallingPermission(String16(permission), reinterpret_cast<int32_t*>(&pid), 124 reinterpret_cast<int32_t*>(&uid))) { 125 return ok(); 126 } else { 127 return exception(binder::Status::EX_SECURITY, 128 StringPrintf("UID %d / PID %d lacks permission %s", uid, pid, permission)); 129 } 130} 131 132binder::Status checkUid(uid_t expectedUid) { 133 uid_t uid = IPCThreadState::self()->getCallingUid(); 134 if (uid == expectedUid || uid == AID_ROOT) { 135 return ok(); 136 } else { 137 return exception(binder::Status::EX_SECURITY, 138 StringPrintf("UID %d is not expected UID %d", uid, expectedUid)); 139 } 140} 141 142binder::Status checkArgumentUuid(const std::unique_ptr<std::string>& uuid) { 143 if (!uuid || is_valid_filename(*uuid)) { 144 return ok(); 145 } else { 146 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 147 StringPrintf("UUID %s is malformed", uuid->c_str())); 148 } 149} 150 151binder::Status checkArgumentPackageName(const std::string& packageName) { 152 if (is_valid_package_name(packageName.c_str())) { 153 return ok(); 154 } else { 155 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 156 StringPrintf("Package name %s is malformed", packageName.c_str())); 157 } 158} 159 160#define ENFORCE_UID(uid) { \ 161 binder::Status status = checkUid((uid)); \ 162 if (!status.isOk()) { \ 163 return status; \ 164 } \ 165} 166 167#define CHECK_ARGUMENT_UUID(uuid) { \ 168 binder::Status status = checkArgumentUuid((uuid)); \ 169 if (!status.isOk()) { \ 170 return status; \ 171 } \ 172} 173 174#define CHECK_ARGUMENT_PACKAGE_NAME(packageName) { \ 175 binder::Status status = \ 176 checkArgumentPackageName((packageName)); \ 177 if (!status.isOk()) { \ 178 return status; \ 179 } \ 180} 181 182} // namespace 183 184status_t InstalldNativeService::start() { 185 IPCThreadState::self()->disableBackgroundScheduling(true); 186 status_t ret = BinderService<InstalldNativeService>::publish(); 187 if (ret != android::OK) { 188 return ret; 189 } 190 sp<ProcessState> ps(ProcessState::self()); 191 ps->startThreadPool(); 192 ps->giveThreadPoolName(); 193 return android::OK; 194} 195 196status_t InstalldNativeService::dump(int fd, const Vector<String16> & /* args */) { 197 auto out = std::fstream(StringPrintf("/proc/self/fd/%d", fd)); 198 const binder::Status dump_permission = checkPermission(kDump); 199 if (!dump_permission.isOk()) { 200 out << dump_permission.toString8() << endl; 201 return PERMISSION_DENIED; 202 } 203 std::lock_guard<std::recursive_mutex> lock(mLock); 204 205 out << "installd is happy!" << endl; 206 207 { 208 std::lock_guard<std::recursive_mutex> lock(mQuotaDevicesLock); 209 out << endl << "Devices with quota support:" << endl; 210 for (const auto& n : mQuotaDevices) { 211 out << " " << n.first << " = " << n.second << endl; 212 } 213 } 214 215 { 216 std::lock_guard<std::recursive_mutex> lock(mCacheQuotasLock); 217 out << endl << "Per-UID cache quotas:" << endl; 218 for (const auto& n : mCacheQuotas) { 219 out << " " << n.first << " = " << n.second << endl; 220 } 221 } 222 223 out << endl; 224 out.flush(); 225 226 return NO_ERROR; 227} 228 229/** 230 * Perform restorecon of the given path, but only perform recursive restorecon 231 * if the label of that top-level file actually changed. This can save us 232 * significant time by avoiding no-op traversals of large filesystem trees. 233 */ 234static int restorecon_app_data_lazy(const std::string& path, const std::string& seInfo, uid_t uid, 235 bool existing) { 236 int res = 0; 237 char* before = nullptr; 238 char* after = nullptr; 239 240 // Note that SELINUX_ANDROID_RESTORECON_DATADATA flag is set by 241 // libselinux. Not needed here. 242 243 if (lgetfilecon(path.c_str(), &before) < 0) { 244 PLOG(ERROR) << "Failed before getfilecon for " << path; 245 goto fail; 246 } 247 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 0) < 0) { 248 PLOG(ERROR) << "Failed top-level restorecon for " << path; 249 goto fail; 250 } 251 if (lgetfilecon(path.c_str(), &after) < 0) { 252 PLOG(ERROR) << "Failed after getfilecon for " << path; 253 goto fail; 254 } 255 256 // If the initial top-level restorecon above changed the label, then go 257 // back and restorecon everything recursively 258 if (strcmp(before, after)) { 259 if (existing) { 260 LOG(DEBUG) << "Detected label change from " << before << " to " << after << " at " 261 << path << "; running recursive restorecon"; 262 } 263 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 264 SELINUX_ANDROID_RESTORECON_RECURSE) < 0) { 265 PLOG(ERROR) << "Failed recursive restorecon for " << path; 266 goto fail; 267 } 268 } 269 270 goto done; 271fail: 272 res = -1; 273done: 274 free(before); 275 free(after); 276 return res; 277} 278 279static int restorecon_app_data_lazy(const std::string& parent, const char* name, 280 const std::string& seInfo, uid_t uid, bool existing) { 281 return restorecon_app_data_lazy(StringPrintf("%s/%s", parent.c_str(), name), seInfo, uid, 282 existing); 283} 284 285static int prepare_app_dir(const std::string& path, mode_t target_mode, uid_t uid) { 286 if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, uid) != 0) { 287 PLOG(ERROR) << "Failed to prepare " << path; 288 return -1; 289 } 290 return 0; 291} 292 293/** 294 * Ensure that we have a hard-limit quota to protect against abusive apps; 295 * they should never use more than 90% of blocks or 50% of inodes. 296 */ 297static int prepare_app_quota(const std::unique_ptr<std::string>& uuid, const std::string& device, 298 uid_t uid) { 299 if (device.empty()) return 0; 300 301 struct dqblk dq; 302 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 303 reinterpret_cast<char*>(&dq)) != 0) { 304 PLOG(WARNING) << "Failed to find quota for " << uid; 305 return -1; 306 } 307 308 if ((dq.dqb_bhardlimit == 0) || (dq.dqb_ihardlimit == 0)) { 309 auto path = create_data_path(uuid ? uuid->c_str() : nullptr); 310 struct statvfs stat; 311 if (statvfs(path.c_str(), &stat) != 0) { 312 PLOG(WARNING) << "Failed to statvfs " << path; 313 return -1; 314 } 315 316 dq.dqb_valid = QIF_LIMITS; 317 dq.dqb_bhardlimit = (((stat.f_blocks * stat.f_frsize) / 10) * 9) / QIF_DQBLKSIZE; 318 dq.dqb_ihardlimit = (stat.f_files / 2); 319 if (quotactl(QCMD(Q_SETQUOTA, USRQUOTA), device.c_str(), uid, 320 reinterpret_cast<char*>(&dq)) != 0) { 321 PLOG(WARNING) << "Failed to set hard quota for " << uid; 322 return -1; 323 } else { 324 LOG(DEBUG) << "Applied hard quotas for " << uid; 325 return 0; 326 } 327 } else { 328 // Hard quota already set; assume it's reasonable 329 return 0; 330 } 331} 332 333binder::Status InstalldNativeService::createAppData(const std::unique_ptr<std::string>& uuid, 334 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 335 const std::string& seInfo, int32_t targetSdkVersion, int64_t* _aidl_return) { 336 ENFORCE_UID(AID_SYSTEM); 337 CHECK_ARGUMENT_UUID(uuid); 338 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 339 std::lock_guard<std::recursive_mutex> lock(mLock); 340 341 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 342 const char* pkgname = packageName.c_str(); 343 344 // Assume invalid inode unless filled in below 345 if (_aidl_return != nullptr) *_aidl_return = -1; 346 347 int32_t uid = multiuser_get_uid(userId, appId); 348 int32_t cacheGid = multiuser_get_cache_gid(userId, appId); 349 mode_t targetMode = targetSdkVersion >= MIN_RESTRICTED_HOME_SDK_VERSION ? 0700 : 0751; 350 351 // If UID doesn't have a specific cache GID, use UID value 352 if (cacheGid == -1) { 353 cacheGid = uid; 354 } 355 356 if (flags & FLAG_STORAGE_CE) { 357 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname); 358 bool existing = (access(path.c_str(), F_OK) == 0); 359 360 if (prepare_app_dir(path, targetMode, uid) || 361 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 362 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 363 return error("Failed to prepare " + path); 364 } 365 366 // Consider restorecon over contents if label changed 367 if (restorecon_app_data_lazy(path, seInfo, uid, existing) || 368 restorecon_app_data_lazy(path, "cache", seInfo, uid, existing) || 369 restorecon_app_data_lazy(path, "code_cache", seInfo, uid, existing)) { 370 return error("Failed to restorecon " + path); 371 } 372 373 // Remember inode numbers of cache directories so that we can clear 374 // contents while CE storage is locked 375 if (write_path_inode(path, "cache", kXattrInodeCache) || 376 write_path_inode(path, "code_cache", kXattrInodeCodeCache)) { 377 return error("Failed to write_path_inode for " + path); 378 } 379 380 // And return the CE inode of the top-level data directory so we can 381 // clear contents while CE storage is locked 382 if ((_aidl_return != nullptr) 383 && get_path_inode(path, reinterpret_cast<ino_t*>(_aidl_return)) != 0) { 384 return error("Failed to get_path_inode for " + path); 385 } 386 } 387 if (flags & FLAG_STORAGE_DE) { 388 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 389 bool existing = (access(path.c_str(), F_OK) == 0); 390 391 if (prepare_app_dir(path, targetMode, uid) || 392 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 393 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 394 return error("Failed to prepare " + path); 395 } 396 397 // Consider restorecon over contents if label changed 398 if (restorecon_app_data_lazy(path, seInfo, uid, existing)) { 399 return error("Failed to restorecon " + path); 400 } 401 402 if (prepare_app_quota(uuid, findQuotaDeviceForUuid(uuid), uid)) { 403 return error("Failed to set hard quota " + path); 404 } 405 406 if (property_get_bool("dalvik.vm.usejitprofiles", false)) { 407 const std::string profile_dir = 408 create_primary_current_profile_package_dir_path(userId, pkgname); 409 // read-write-execute only for the app user. 410 if (fs_prepare_dir_strict(profile_dir.c_str(), 0700, uid, uid) != 0) { 411 return error("Failed to prepare " + profile_dir); 412 } 413 const std::string profile_file = create_current_profile_path(userId, pkgname, 414 /*is_secondary_dex*/false); 415 // read-write only for the app user. 416 if (fs_prepare_file_strict(profile_file.c_str(), 0600, uid, uid) != 0) { 417 return error("Failed to prepare " + profile_file); 418 } 419 const std::string ref_profile_path = 420 create_primary_reference_profile_package_dir_path(pkgname); 421 // dex2oat/profman runs under the shared app gid and it needs to read/write reference 422 // profiles. 423 int shared_app_gid = multiuser_get_shared_gid(0, appId); 424 if ((shared_app_gid != -1) && fs_prepare_dir_strict( 425 ref_profile_path.c_str(), 0700, shared_app_gid, shared_app_gid) != 0) { 426 return error("Failed to prepare " + ref_profile_path); 427 } 428 } 429 } 430 return ok(); 431} 432 433binder::Status InstalldNativeService::migrateAppData(const std::unique_ptr<std::string>& uuid, 434 const std::string& packageName, int32_t userId, int32_t flags) { 435 ENFORCE_UID(AID_SYSTEM); 436 CHECK_ARGUMENT_UUID(uuid); 437 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 438 std::lock_guard<std::recursive_mutex> lock(mLock); 439 440 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 441 const char* pkgname = packageName.c_str(); 442 443 // This method only exists to upgrade system apps that have requested 444 // forceDeviceEncrypted, so their default storage always lives in a 445 // consistent location. This only works on non-FBE devices, since we 446 // never want to risk exposing data on a device with real CE/DE storage. 447 448 auto ce_path = create_data_user_ce_package_path(uuid_, userId, pkgname); 449 auto de_path = create_data_user_de_package_path(uuid_, userId, pkgname); 450 451 // If neither directory is marked as default, assume CE is default 452 if (getxattr(ce_path.c_str(), kXattrDefault, nullptr, 0) == -1 453 && getxattr(de_path.c_str(), kXattrDefault, nullptr, 0) == -1) { 454 if (setxattr(ce_path.c_str(), kXattrDefault, nullptr, 0, 0) != 0) { 455 return error("Failed to mark default storage " + ce_path); 456 } 457 } 458 459 // Migrate default data location if needed 460 auto target = (flags & FLAG_STORAGE_DE) ? de_path : ce_path; 461 auto source = (flags & FLAG_STORAGE_DE) ? ce_path : de_path; 462 463 if (getxattr(target.c_str(), kXattrDefault, nullptr, 0) == -1) { 464 LOG(WARNING) << "Requested default storage " << target 465 << " is not active; migrating from " << source; 466 if (delete_dir_contents_and_dir(target) != 0) { 467 return error("Failed to delete " + target); 468 } 469 if (rename(source.c_str(), target.c_str()) != 0) { 470 return error("Failed to rename " + source + " to " + target); 471 } 472 } 473 474 return ok(); 475} 476 477 478binder::Status InstalldNativeService::clearAppProfiles(const std::string& packageName) { 479 ENFORCE_UID(AID_SYSTEM); 480 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 481 std::lock_guard<std::recursive_mutex> lock(mLock); 482 483 binder::Status res = ok(); 484 if (!clear_primary_reference_profile(packageName)) { 485 res = error("Failed to clear reference profile for " + packageName); 486 } 487 if (!clear_primary_current_profiles(packageName)) { 488 res = error("Failed to clear current profiles for " + packageName); 489 } 490 return res; 491} 492 493binder::Status InstalldNativeService::clearAppData(const std::unique_ptr<std::string>& uuid, 494 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 495 ENFORCE_UID(AID_SYSTEM); 496 CHECK_ARGUMENT_UUID(uuid); 497 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 498 std::lock_guard<std::recursive_mutex> lock(mLock); 499 500 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 501 const char* pkgname = packageName.c_str(); 502 503 binder::Status res = ok(); 504 if (flags & FLAG_STORAGE_CE) { 505 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 506 if (flags & FLAG_CLEAR_CACHE_ONLY) { 507 path = read_path_inode(path, "cache", kXattrInodeCache); 508 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 509 path = read_path_inode(path, "code_cache", kXattrInodeCodeCache); 510 } 511 if (access(path.c_str(), F_OK) == 0) { 512 if (delete_dir_contents(path) != 0) { 513 res = error("Failed to delete contents of " + path); 514 } 515 } 516 } 517 if (flags & FLAG_STORAGE_DE) { 518 std::string suffix = ""; 519 bool only_cache = false; 520 if (flags & FLAG_CLEAR_CACHE_ONLY) { 521 suffix = CACHE_DIR_POSTFIX; 522 only_cache = true; 523 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 524 suffix = CODE_CACHE_DIR_POSTFIX; 525 only_cache = true; 526 } 527 528 auto path = create_data_user_de_package_path(uuid_, userId, pkgname) + suffix; 529 if (access(path.c_str(), F_OK) == 0) { 530 if (delete_dir_contents(path) != 0) { 531 res = error("Failed to delete contents of " + path); 532 } 533 } 534 if (!only_cache) { 535 if (!clear_primary_current_profile(packageName, userId)) { 536 res = error("Failed to clear current profile for " + packageName); 537 } 538 } 539 } 540 return res; 541} 542 543static int destroy_app_reference_profile(const std::string& pkgname) { 544 return delete_dir_contents_and_dir( 545 create_primary_reference_profile_package_dir_path(pkgname), 546 /*ignore_if_missing*/ true); 547} 548 549static int destroy_app_current_profiles(const std::string& pkgname, userid_t userid) { 550 return delete_dir_contents_and_dir( 551 create_primary_current_profile_package_dir_path(userid, pkgname), 552 /*ignore_if_missing*/ true); 553} 554 555binder::Status InstalldNativeService::destroyAppProfiles(const std::string& packageName) { 556 ENFORCE_UID(AID_SYSTEM); 557 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 558 std::lock_guard<std::recursive_mutex> lock(mLock); 559 560 binder::Status res = ok(); 561 std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr); 562 for (auto user : users) { 563 if (destroy_app_current_profiles(packageName, user) != 0) { 564 res = error("Failed to destroy current profiles for " + packageName); 565 } 566 } 567 if (destroy_app_reference_profile(packageName) != 0) { 568 res = error("Failed to destroy reference profile for " + packageName); 569 } 570 return res; 571} 572 573binder::Status InstalldNativeService::destroyAppData(const std::unique_ptr<std::string>& uuid, 574 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 575 ENFORCE_UID(AID_SYSTEM); 576 CHECK_ARGUMENT_UUID(uuid); 577 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 578 std::lock_guard<std::recursive_mutex> lock(mLock); 579 580 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 581 const char* pkgname = packageName.c_str(); 582 583 binder::Status res = ok(); 584 if (flags & FLAG_STORAGE_CE) { 585 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 586 if (delete_dir_contents_and_dir(path) != 0) { 587 res = error("Failed to delete " + path); 588 } 589 } 590 if (flags & FLAG_STORAGE_DE) { 591 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 592 if (delete_dir_contents_and_dir(path) != 0) { 593 res = error("Failed to delete " + path); 594 } 595 destroy_app_current_profiles(packageName, userId); 596 // TODO(calin): If the package is still installed by other users it's probably 597 // beneficial to keep the reference profile around. 598 // Verify if it's ok to do that. 599 destroy_app_reference_profile(packageName); 600 } 601 return res; 602} 603 604static gid_t get_cache_gid(uid_t uid) { 605 int32_t gid = multiuser_get_cache_gid(multiuser_get_user_id(uid), multiuser_get_app_id(uid)); 606 return (gid != -1) ? gid : uid; 607} 608 609binder::Status InstalldNativeService::fixupAppData(const std::unique_ptr<std::string>& uuid, 610 int32_t flags) { 611 ENFORCE_UID(AID_SYSTEM); 612 CHECK_ARGUMENT_UUID(uuid); 613 std::lock_guard<std::recursive_mutex> lock(mLock); 614 615 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 616 for (auto user : get_known_users(uuid_)) { 617 ATRACE_BEGIN("fixup user"); 618 FTS* fts; 619 FTSENT* p; 620 char *argv[] = { 621 (char*) create_data_user_ce_path(uuid_, user).c_str(), 622 (char*) create_data_user_de_path(uuid_, user).c_str(), 623 nullptr 624 }; 625 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL))) { 626 return error("Failed to fts_open"); 627 } 628 while ((p = fts_read(fts)) != nullptr) { 629 if (p->fts_info == FTS_D && p->fts_level == 1) { 630 // Track down inodes of cache directories 631 uint64_t raw = 0; 632 ino_t inode_cache = 0; 633 ino_t inode_code_cache = 0; 634 if (getxattr(p->fts_path, kXattrInodeCache, &raw, sizeof(raw)) == sizeof(raw)) { 635 inode_cache = raw; 636 } 637 if (getxattr(p->fts_path, kXattrInodeCodeCache, &raw, sizeof(raw)) == sizeof(raw)) { 638 inode_code_cache = raw; 639 } 640 641 // Figure out expected GID of each child 642 FTSENT* child = fts_children(fts, 0); 643 while (child != nullptr) { 644 if ((child->fts_statp->st_ino == inode_cache) 645 || (child->fts_statp->st_ino == inode_code_cache) 646 || !strcmp(child->fts_name, "cache") 647 || !strcmp(child->fts_name, "code_cache")) { 648 child->fts_number = get_cache_gid(p->fts_statp->st_uid); 649 } else { 650 child->fts_number = p->fts_statp->st_uid; 651 } 652 child = child->fts_link; 653 } 654 } else if (p->fts_level >= 2) { 655 if (p->fts_level > 2) { 656 // Inherit GID from parent once we're deeper into tree 657 p->fts_number = p->fts_parent->fts_number; 658 } 659 660 uid_t uid = p->fts_parent->fts_statp->st_uid; 661 gid_t cache_gid = get_cache_gid(uid); 662 gid_t expected = p->fts_number; 663 gid_t actual = p->fts_statp->st_gid; 664 if (actual == expected) { 665#if FIXUP_DEBUG 666 LOG(DEBUG) << "Ignoring " << p->fts_path << " with expected GID " << expected; 667#endif 668 if (!(flags & FLAG_FORCE)) { 669 fts_set(fts, p, FTS_SKIP); 670 } 671 } else if ((actual == uid) || (actual == cache_gid)) { 672 // Only consider fixing up when current GID belongs to app 673 if (p->fts_info != FTS_D) { 674 LOG(INFO) << "Fixing " << p->fts_path << " with unexpected GID " << actual 675 << " instead of " << expected; 676 } 677 switch (p->fts_info) { 678 case FTS_DP: 679 // If we're moving towards cache GID, we need to set S_ISGID 680 if (expected == cache_gid) { 681 if (chmod(p->fts_path, 02771) != 0) { 682 PLOG(WARNING) << "Failed to chmod " << p->fts_path; 683 } 684 } 685 // Intentional fall through to also set GID 686 case FTS_F: 687 if (chown(p->fts_path, -1, expected) != 0) { 688 PLOG(WARNING) << "Failed to chown " << p->fts_path; 689 } 690 break; 691 case FTS_SL: 692 case FTS_SLNONE: 693 if (lchown(p->fts_path, -1, expected) != 0) { 694 PLOG(WARNING) << "Failed to chown " << p->fts_path; 695 } 696 break; 697 } 698 } else { 699 // Ignore all other GID transitions, since they're kinda shady 700 LOG(WARNING) << "Ignoring " << p->fts_path << " with unexpected GID " << actual 701 << " instead of " << expected; 702 } 703 } 704 } 705 fts_close(fts); 706 ATRACE_END(); 707 } 708 return ok(); 709} 710 711binder::Status InstalldNativeService::moveCompleteApp(const std::unique_ptr<std::string>& fromUuid, 712 const std::unique_ptr<std::string>& toUuid, const std::string& packageName, 713 const std::string& dataAppName, int32_t appId, const std::string& seInfo, 714 int32_t targetSdkVersion) { 715 ENFORCE_UID(AID_SYSTEM); 716 CHECK_ARGUMENT_UUID(fromUuid); 717 CHECK_ARGUMENT_UUID(toUuid); 718 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 719 std::lock_guard<std::recursive_mutex> lock(mLock); 720 721 const char* from_uuid = fromUuid ? fromUuid->c_str() : nullptr; 722 const char* to_uuid = toUuid ? toUuid->c_str() : nullptr; 723 const char* package_name = packageName.c_str(); 724 const char* data_app_name = dataAppName.c_str(); 725 726 binder::Status res = ok(); 727 std::vector<userid_t> users = get_known_users(from_uuid); 728 729 // Copy app 730 { 731 auto from = create_data_app_package_path(from_uuid, data_app_name); 732 auto to = create_data_app_package_path(to_uuid, data_app_name); 733 auto to_parent = create_data_app_path(to_uuid); 734 735 char *argv[] = { 736 (char*) kCpPath, 737 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 738 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 739 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 740 (char*) "-P", /* Do not follow symlinks [default] */ 741 (char*) "-d", /* don't dereference symlinks */ 742 (char*) from.c_str(), 743 (char*) to_parent.c_str() 744 }; 745 746 LOG(DEBUG) << "Copying " << from << " to " << to; 747 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 748 if (rc != 0) { 749 res = error(rc, "Failed copying " + from + " to " + to); 750 goto fail; 751 } 752 753 if (selinux_android_restorecon(to.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) { 754 res = error("Failed to restorecon " + to); 755 goto fail; 756 } 757 } 758 759 // Copy private data for all known users 760 for (auto user : users) { 761 762 // Data source may not exist for all users; that's okay 763 auto from_ce = create_data_user_ce_package_path(from_uuid, user, package_name); 764 if (access(from_ce.c_str(), F_OK) != 0) { 765 LOG(INFO) << "Missing source " << from_ce; 766 continue; 767 } 768 769 if (!createAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, appId, 770 seInfo, targetSdkVersion, nullptr).isOk()) { 771 res = error("Failed to create package target"); 772 goto fail; 773 } 774 775 char *argv[] = { 776 (char*) kCpPath, 777 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 778 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 779 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 780 (char*) "-P", /* Do not follow symlinks [default] */ 781 (char*) "-d", /* don't dereference symlinks */ 782 nullptr, 783 nullptr 784 }; 785 786 { 787 auto from = create_data_user_de_package_path(from_uuid, user, package_name); 788 auto to = create_data_user_de_path(to_uuid, user); 789 argv[6] = (char*) from.c_str(); 790 argv[7] = (char*) to.c_str(); 791 792 LOG(DEBUG) << "Copying " << from << " to " << to; 793 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 794 if (rc != 0) { 795 res = error(rc, "Failed copying " + from + " to " + to); 796 goto fail; 797 } 798 } 799 { 800 auto from = create_data_user_ce_package_path(from_uuid, user, package_name); 801 auto to = create_data_user_ce_path(to_uuid, user); 802 argv[6] = (char*) from.c_str(); 803 argv[7] = (char*) to.c_str(); 804 805 LOG(DEBUG) << "Copying " << from << " to " << to; 806 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 807 if (rc != 0) { 808 res = error(rc, "Failed copying " + from + " to " + to); 809 goto fail; 810 } 811 } 812 813 if (!restoreconAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, 814 appId, seInfo).isOk()) { 815 res = error("Failed to restorecon"); 816 goto fail; 817 } 818 } 819 820 // We let the framework scan the new location and persist that before 821 // deleting the data in the old location; this ordering ensures that 822 // we can recover from things like battery pulls. 823 return ok(); 824 825fail: 826 // Nuke everything we might have already copied 827 { 828 auto to = create_data_app_package_path(to_uuid, data_app_name); 829 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 830 LOG(WARNING) << "Failed to rollback " << to; 831 } 832 } 833 for (auto user : users) { 834 { 835 auto to = create_data_user_de_package_path(to_uuid, user, package_name); 836 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 837 LOG(WARNING) << "Failed to rollback " << to; 838 } 839 } 840 { 841 auto to = create_data_user_ce_package_path(to_uuid, user, package_name); 842 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 843 LOG(WARNING) << "Failed to rollback " << to; 844 } 845 } 846 } 847 return res; 848} 849 850binder::Status InstalldNativeService::createUserData(const std::unique_ptr<std::string>& uuid, 851 int32_t userId, int32_t userSerial ATTRIBUTE_UNUSED, int32_t flags) { 852 ENFORCE_UID(AID_SYSTEM); 853 CHECK_ARGUMENT_UUID(uuid); 854 std::lock_guard<std::recursive_mutex> lock(mLock); 855 856 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 857 if (flags & FLAG_STORAGE_DE) { 858 if (uuid_ == nullptr) { 859 if (ensure_config_user_dirs(userId) != 0) { 860 return error(StringPrintf("Failed to ensure dirs for %d", userId)); 861 } 862 } 863 } 864 865 // Data under /data/media doesn't have an app, but we still want 866 // to limit it to prevent abuse. 867 if (prepare_app_quota(uuid, findQuotaDeviceForUuid(uuid), 868 multiuser_get_uid(userId, AID_MEDIA_RW))) { 869 return error("Failed to set hard quota for media_rw"); 870 } 871 872 return ok(); 873} 874 875binder::Status InstalldNativeService::destroyUserData(const std::unique_ptr<std::string>& uuid, 876 int32_t userId, int32_t flags) { 877 ENFORCE_UID(AID_SYSTEM); 878 CHECK_ARGUMENT_UUID(uuid); 879 std::lock_guard<std::recursive_mutex> lock(mLock); 880 881 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 882 binder::Status res = ok(); 883 if (flags & FLAG_STORAGE_DE) { 884 auto path = create_data_user_de_path(uuid_, userId); 885 if (delete_dir_contents_and_dir(path, true) != 0) { 886 res = error("Failed to delete " + path); 887 } 888 if (uuid_ == nullptr) { 889 path = create_data_misc_legacy_path(userId); 890 if (delete_dir_contents_and_dir(path, true) != 0) { 891 res = error("Failed to delete " + path); 892 } 893 path = create_primary_cur_profile_dir_path(userId); 894 if (delete_dir_contents_and_dir(path, true) != 0) { 895 res = error("Failed to delete " + path); 896 } 897 } 898 } 899 if (flags & FLAG_STORAGE_CE) { 900 auto path = create_data_user_ce_path(uuid_, userId); 901 if (delete_dir_contents_and_dir(path, true) != 0) { 902 res = error("Failed to delete " + path); 903 } 904 path = create_data_media_path(uuid_, userId); 905 if (delete_dir_contents_and_dir(path, true) != 0) { 906 res = error("Failed to delete " + path); 907 } 908 } 909 return res; 910} 911 912/* Try to ensure free_size bytes of storage are available. 913 * Returns 0 on success. 914 * This is rather simple-minded because doing a full LRU would 915 * be potentially memory-intensive, and without atime it would 916 * also require that apps constantly modify file metadata even 917 * when just reading from the cache, which is pretty awful. 918 */ 919binder::Status InstalldNativeService::freeCache(const std::unique_ptr<std::string>& uuid, 920 int64_t freeStorageSize, int32_t flags) { 921 ENFORCE_UID(AID_SYSTEM); 922 CHECK_ARGUMENT_UUID(uuid); 923 std::lock_guard<std::recursive_mutex> lock(mLock); 924 925 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 926 auto data_path = create_data_path(uuid_); 927 auto device = findQuotaDeviceForUuid(uuid); 928 auto noop = (flags & FLAG_FREE_CACHE_NOOP); 929 930 int64_t free = data_disk_free(data_path); 931 if (free < 0) { 932 return error("Failed to determine free space for " + data_path); 933 } 934 935 int64_t needed = freeStorageSize - free; 936 LOG(DEBUG) << "Device " << data_path << " has " << free << " free; requested " 937 << freeStorageSize << "; needed " << needed; 938 939 if (free >= freeStorageSize) { 940 return ok(); 941 } 942 943 if (flags & FLAG_FREE_CACHE_V2) { 944 // This new cache strategy fairly removes files from UIDs by deleting 945 // files from the UIDs which are most over their allocated quota 946 947 // 1. Create trackers for every known UID 948 ATRACE_BEGIN("create"); 949 std::unordered_map<uid_t, std::shared_ptr<CacheTracker>> trackers; 950 for (auto user : get_known_users(uuid_)) { 951 FTS *fts; 952 FTSENT *p; 953 char *argv[] = { 954 (char*) create_data_user_ce_path(uuid_, user).c_str(), 955 (char*) create_data_user_de_path(uuid_, user).c_str(), 956 nullptr 957 }; 958 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL))) { 959 return error("Failed to fts_open"); 960 } 961 while ((p = fts_read(fts)) != NULL) { 962 if (p->fts_info == FTS_D && p->fts_level == 1) { 963 uid_t uid = p->fts_statp->st_uid; 964 auto search = trackers.find(uid); 965 if (search != trackers.end()) { 966 search->second->addDataPath(p->fts_path); 967 } else { 968 auto tracker = std::shared_ptr<CacheTracker>(new CacheTracker( 969 multiuser_get_user_id(uid), multiuser_get_app_id(uid), device)); 970 tracker->addDataPath(p->fts_path); 971 { 972 std::lock_guard<std::recursive_mutex> lock(mCacheQuotasLock); 973 tracker->cacheQuota = mCacheQuotas[uid]; 974 } 975 if (tracker->cacheQuota == 0) { 976#if MEASURE_DEBUG 977 LOG(WARNING) << "UID " << uid << " has no cache quota; assuming 64MB"; 978#endif 979 tracker->cacheQuota = 67108864; 980 } 981 trackers[uid] = tracker; 982 } 983 fts_set(fts, p, FTS_SKIP); 984 } 985 } 986 fts_close(fts); 987 } 988 ATRACE_END(); 989 990 // 2. Populate tracker stats and insert into priority queue 991 ATRACE_BEGIN("populate"); 992 auto cmp = [](std::shared_ptr<CacheTracker> left, std::shared_ptr<CacheTracker> right) { 993 return (left->getCacheRatio() < right->getCacheRatio()); 994 }; 995 std::priority_queue<std::shared_ptr<CacheTracker>, 996 std::vector<std::shared_ptr<CacheTracker>>, decltype(cmp)> queue(cmp); 997 for (const auto& it : trackers) { 998 it.second->loadStats(); 999 queue.push(it.second); 1000 } 1001 ATRACE_END(); 1002 1003 // 3. Bounce across the queue, freeing items from whichever tracker is 1004 // the most over their assigned quota 1005 ATRACE_BEGIN("bounce"); 1006 std::shared_ptr<CacheTracker> active; 1007 while (active || !queue.empty()) { 1008 // Only look at apps under quota when explicitly requested 1009 if (active && (active->getCacheRatio() < 10000) 1010 && !(flags & FLAG_FREE_CACHE_V2_DEFY_QUOTA)) { 1011 LOG(DEBUG) << "Active ratio " << active->getCacheRatio() 1012 << " isn't over quota, and defy not requested"; 1013 break; 1014 } 1015 1016 // Find the best tracker to work with; this might involve swapping 1017 // if the active tracker is no longer the most over quota 1018 bool nextBetter = active && !queue.empty() 1019 && active->getCacheRatio() < queue.top()->getCacheRatio(); 1020 if (!active || nextBetter) { 1021 if (active) { 1022 // Current tracker still has items, so we'll consider it 1023 // again later once it bubbles up to surface 1024 queue.push(active); 1025 } 1026 active = queue.top(); queue.pop(); 1027 active->ensureItems(); 1028 continue; 1029 } 1030 1031 // If no items remain, go find another tracker 1032 if (active->items.empty()) { 1033 active = nullptr; 1034 continue; 1035 } else { 1036 auto item = active->items.back(); 1037 active->items.pop_back(); 1038 1039 LOG(DEBUG) << "Purging " << item->toString() << " from " << active->toString(); 1040 if (!noop) { 1041 item->purge(); 1042 } 1043 active->cacheUsed -= item->size; 1044 needed -= item->size; 1045 } 1046 1047 // Verify that we're actually done before bailing, since sneaky 1048 // apps might be using hardlinks 1049 if (needed <= 0) { 1050 free = data_disk_free(data_path); 1051 needed = freeStorageSize - free; 1052 if (needed <= 0) { 1053 break; 1054 } else { 1055 LOG(WARNING) << "Expected to be done but still need " << needed; 1056 } 1057 } 1058 } 1059 ATRACE_END(); 1060 1061 } else { 1062 return error("Legacy cache logic no longer supported"); 1063 } 1064 1065 free = data_disk_free(data_path); 1066 if (free >= freeStorageSize) { 1067 return ok(); 1068 } else { 1069 return error(StringPrintf("Failed to free up %" PRId64 " on %s; final free space %" PRId64, 1070 freeStorageSize, data_path.c_str(), free)); 1071 } 1072} 1073 1074binder::Status InstalldNativeService::rmdex(const std::string& codePath, 1075 const std::string& instructionSet) { 1076 ENFORCE_UID(AID_SYSTEM); 1077 std::lock_guard<std::recursive_mutex> lock(mLock); 1078 1079 char dex_path[PKG_PATH_MAX]; 1080 1081 const char* path = codePath.c_str(); 1082 const char* instruction_set = instructionSet.c_str(); 1083 1084 if (validate_apk_path(path) && validate_system_app_path(path)) { 1085 return error("Invalid path " + codePath); 1086 } 1087 1088 if (!create_cache_path(dex_path, path, instruction_set)) { 1089 return error("Failed to create cache path for " + codePath); 1090 } 1091 1092 ALOGV("unlink %s\n", dex_path); 1093 if (unlink(dex_path) < 0) { 1094 return error(StringPrintf("Failed to unlink %s", dex_path)); 1095 } else { 1096 return ok(); 1097 } 1098} 1099 1100struct stats { 1101 int64_t codeSize; 1102 int64_t dataSize; 1103 int64_t cacheSize; 1104}; 1105 1106#if MEASURE_DEBUG 1107static std::string toString(std::vector<int64_t> values) { 1108 std::stringstream res; 1109 res << "["; 1110 for (size_t i = 0; i < values.size(); i++) { 1111 res << values[i]; 1112 if (i < values.size() - 1) { 1113 res << ","; 1114 } 1115 } 1116 res << "]"; 1117 return res.str(); 1118} 1119#endif 1120 1121static void collectQuotaStats(const std::string& device, int32_t userId, 1122 int32_t appId, struct stats* stats, struct stats* extStats) { 1123 if (device.empty()) return; 1124 1125 struct dqblk dq; 1126 1127 uid_t uid = multiuser_get_uid(userId, appId); 1128 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1129 reinterpret_cast<char*>(&dq)) != 0) { 1130 if (errno != ESRCH) { 1131 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1132 } 1133 } else { 1134#if MEASURE_DEBUG 1135 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1136#endif 1137 stats->dataSize += dq.dqb_curspace; 1138 } 1139 1140 int cacheGid = multiuser_get_cache_gid(userId, appId); 1141 if (cacheGid != -1) { 1142 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), cacheGid, 1143 reinterpret_cast<char*>(&dq)) != 0) { 1144 if (errno != ESRCH) { 1145 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << cacheGid; 1146 } 1147 } else { 1148#if MEASURE_DEBUG 1149 LOG(DEBUG) << "quotactl() for GID " << cacheGid << " " << dq.dqb_curspace; 1150#endif 1151 stats->cacheSize += dq.dqb_curspace; 1152 } 1153 } 1154 1155 int extGid = multiuser_get_ext_gid(userId, appId); 1156 if (extGid != -1) { 1157 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), extGid, 1158 reinterpret_cast<char*>(&dq)) != 0) { 1159 if (errno != ESRCH) { 1160 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << extGid; 1161 } 1162 } else { 1163#if MEASURE_DEBUG 1164 LOG(DEBUG) << "quotactl() for GID " << extGid << " " << dq.dqb_curspace; 1165#endif 1166 extStats->dataSize += dq.dqb_curspace; 1167 } 1168 } 1169 1170 int sharedGid = multiuser_get_shared_gid(userId, appId); 1171 if (sharedGid != -1) { 1172 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), sharedGid, 1173 reinterpret_cast<char*>(&dq)) != 0) { 1174 if (errno != ESRCH) { 1175 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << sharedGid; 1176 } 1177 } else { 1178#if MEASURE_DEBUG 1179 LOG(DEBUG) << "quotactl() for GID " << sharedGid << " " << dq.dqb_curspace; 1180#endif 1181 stats->codeSize += dq.dqb_curspace; 1182 } 1183 } 1184} 1185 1186static void collectManualStats(const std::string& path, struct stats* stats) { 1187 DIR *d; 1188 int dfd; 1189 struct dirent *de; 1190 struct stat s; 1191 1192 d = opendir(path.c_str()); 1193 if (d == nullptr) { 1194 if (errno != ENOENT) { 1195 PLOG(WARNING) << "Failed to open " << path; 1196 } 1197 return; 1198 } 1199 dfd = dirfd(d); 1200 while ((de = readdir(d))) { 1201 const char *name = de->d_name; 1202 1203 int64_t size = 0; 1204 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 1205 size = s.st_blocks * 512; 1206 } 1207 1208 if (de->d_type == DT_DIR) { 1209 if (!strcmp(name, ".")) { 1210 // Don't recurse, but still count node size 1211 } else if (!strcmp(name, "..")) { 1212 // Don't recurse or count node size 1213 continue; 1214 } else { 1215 // Measure all children nodes 1216 size = 0; 1217 calculate_tree_size(StringPrintf("%s/%s", path.c_str(), name), &size); 1218 } 1219 1220 if (!strcmp(name, "cache") || !strcmp(name, "code_cache")) { 1221 stats->cacheSize += size; 1222 } 1223 } 1224 1225 // Legacy symlink isn't owned by app 1226 if (de->d_type == DT_LNK && !strcmp(name, "lib")) { 1227 continue; 1228 } 1229 1230 // Everything found inside is considered data 1231 stats->dataSize += size; 1232 } 1233 closedir(d); 1234} 1235 1236static void collectManualStatsForUser(const std::string& path, struct stats* stats, 1237 bool exclude_apps = false) { 1238 DIR *d; 1239 int dfd; 1240 struct dirent *de; 1241 struct stat s; 1242 1243 d = opendir(path.c_str()); 1244 if (d == nullptr) { 1245 if (errno != ENOENT) { 1246 PLOG(WARNING) << "Failed to open " << path; 1247 } 1248 return; 1249 } 1250 dfd = dirfd(d); 1251 while ((de = readdir(d))) { 1252 if (de->d_type == DT_DIR) { 1253 const char *name = de->d_name; 1254 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) != 0) { 1255 continue; 1256 } 1257 if (!strcmp(name, ".") || !strcmp(name, "..")) { 1258 continue; 1259 } else if (exclude_apps && (s.st_uid >= AID_APP_START && s.st_uid <= AID_APP_END)) { 1260 continue; 1261 } else { 1262 collectManualStats(StringPrintf("%s/%s", path.c_str(), name), stats); 1263 } 1264 } 1265 } 1266 closedir(d); 1267} 1268 1269static void collectManualExternalStatsForUser(const std::string& path, struct stats* stats) { 1270 FTS *fts; 1271 FTSENT *p; 1272 char *argv[] = { (char*) path.c_str(), nullptr }; 1273 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL))) { 1274 PLOG(ERROR) << "Failed to fts_open " << path; 1275 return; 1276 } 1277 while ((p = fts_read(fts)) != NULL) { 1278 p->fts_number = p->fts_parent->fts_number; 1279 switch (p->fts_info) { 1280 case FTS_D: 1281 if (p->fts_level == 4 1282 && !strcmp(p->fts_name, "cache") 1283 && !strcmp(p->fts_parent->fts_parent->fts_name, "data") 1284 && !strcmp(p->fts_parent->fts_parent->fts_parent->fts_name, "Android")) { 1285 p->fts_number = 1; 1286 } 1287 // Fall through to count the directory 1288 case FTS_DEFAULT: 1289 case FTS_F: 1290 case FTS_SL: 1291 case FTS_SLNONE: 1292 int64_t size = (p->fts_statp->st_blocks * 512); 1293 if (p->fts_number == 1) { 1294 stats->cacheSize += size; 1295 } 1296 stats->dataSize += size; 1297 break; 1298 } 1299 } 1300 fts_close(fts); 1301} 1302 1303binder::Status InstalldNativeService::getAppSize(const std::unique_ptr<std::string>& uuid, 1304 const std::vector<std::string>& packageNames, int32_t userId, int32_t flags, 1305 int32_t appId, const std::vector<int64_t>& ceDataInodes, 1306 const std::vector<std::string>& codePaths, std::vector<int64_t>* _aidl_return) { 1307 ENFORCE_UID(AID_SYSTEM); 1308 CHECK_ARGUMENT_UUID(uuid); 1309 for (auto packageName : packageNames) { 1310 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1311 } 1312 // NOTE: Locking is relaxed on this method, since it's limited to 1313 // read-only measurements without mutation. 1314 1315 // When modifying this logic, always verify using tests: 1316 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetAppSize 1317 1318#if MEASURE_DEBUG 1319 LOG(INFO) << "Measuring user " << userId << " app " << appId; 1320#endif 1321 1322 // Here's a summary of the common storage locations across the platform, 1323 // and how they're each tagged: 1324 // 1325 // /data/app/com.example UID system 1326 // /data/app/com.example/oat UID system 1327 // /data/user/0/com.example UID u0_a10 GID u0_a10 1328 // /data/user/0/com.example/cache UID u0_a10 GID u0_a10_cache 1329 // /data/media/0/foo.txt UID u0_media_rw 1330 // /data/media/0/bar.jpg UID u0_media_rw GID u0_media_image 1331 // /data/media/0/Android/data/com.example UID u0_media_rw GID u0_a10_ext 1332 // /data/media/0/Android/data/com.example/cache UID u0_media_rw GID u0_a10_ext_cache 1333 // /data/media/obb/com.example UID system 1334 1335 struct stats stats; 1336 struct stats extStats; 1337 memset(&stats, 0, sizeof(stats)); 1338 memset(&extStats, 0, sizeof(extStats)); 1339 1340 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1341 1342 auto device = findQuotaDeviceForUuid(uuid); 1343 if (device.empty()) { 1344 flags &= ~FLAG_USE_QUOTA; 1345 } 1346 1347 ATRACE_BEGIN("obb"); 1348 for (auto packageName : packageNames) { 1349 auto obbCodePath = create_data_media_obb_path(uuid_, packageName.c_str()); 1350 calculate_tree_size(obbCodePath, &extStats.codeSize); 1351 } 1352 ATRACE_END(); 1353 1354 if (flags & FLAG_USE_QUOTA && appId >= AID_APP_START) { 1355 ATRACE_BEGIN("code"); 1356 for (auto codePath : codePaths) { 1357 calculate_tree_size(codePath, &stats.codeSize, -1, 1358 multiuser_get_shared_gid(userId, appId)); 1359 } 1360 ATRACE_END(); 1361 1362 ATRACE_BEGIN("quota"); 1363 collectQuotaStats(device, userId, appId, &stats, &extStats); 1364 ATRACE_END(); 1365 1366 } else { 1367 ATRACE_BEGIN("code"); 1368 for (auto codePath : codePaths) { 1369 calculate_tree_size(codePath, &stats.codeSize); 1370 } 1371 ATRACE_END(); 1372 1373 for (size_t i = 0; i < packageNames.size(); i++) { 1374 const char* pkgname = packageNames[i].c_str(); 1375 1376 ATRACE_BEGIN("data"); 1377 auto cePath = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInodes[i]); 1378 collectManualStats(cePath, &stats); 1379 auto dePath = create_data_user_de_package_path(uuid_, userId, pkgname); 1380 collectManualStats(dePath, &stats); 1381 ATRACE_END(); 1382 1383 ATRACE_BEGIN("profiles"); 1384 auto userProfilePath = create_primary_current_profile_package_dir_path(userId, pkgname); 1385 calculate_tree_size(userProfilePath, &stats.dataSize); 1386 auto refProfilePath = create_primary_reference_profile_package_dir_path(pkgname); 1387 calculate_tree_size(refProfilePath, &stats.codeSize); 1388 ATRACE_END(); 1389 1390 ATRACE_BEGIN("external"); 1391 auto extPath = create_data_media_package_path(uuid_, userId, "data", pkgname); 1392 collectManualStats(extPath, &extStats); 1393 auto mediaPath = create_data_media_package_path(uuid_, userId, "media", pkgname); 1394 calculate_tree_size(mediaPath, &extStats.dataSize); 1395 ATRACE_END(); 1396 } 1397 1398 ATRACE_BEGIN("dalvik"); 1399 int32_t sharedGid = multiuser_get_shared_gid(userId, appId); 1400 if (sharedGid != -1) { 1401 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1402 sharedGid, -1); 1403 } 1404 calculate_tree_size(create_primary_cur_profile_dir_path(userId), &stats.dataSize, 1405 multiuser_get_uid(userId, appId), -1); 1406 ATRACE_END(); 1407 } 1408 1409 std::vector<int64_t> ret; 1410 ret.push_back(stats.codeSize); 1411 ret.push_back(stats.dataSize); 1412 ret.push_back(stats.cacheSize); 1413 ret.push_back(extStats.codeSize); 1414 ret.push_back(extStats.dataSize); 1415 ret.push_back(extStats.cacheSize); 1416#if MEASURE_DEBUG 1417 LOG(DEBUG) << "Final result " << toString(ret); 1418#endif 1419 *_aidl_return = ret; 1420 return ok(); 1421} 1422 1423binder::Status InstalldNativeService::getUserSize(const std::unique_ptr<std::string>& uuid, 1424 int32_t userId, int32_t flags, const std::vector<int32_t>& appIds, 1425 std::vector<int64_t>* _aidl_return) { 1426 ENFORCE_UID(AID_SYSTEM); 1427 CHECK_ARGUMENT_UUID(uuid); 1428 // NOTE: Locking is relaxed on this method, since it's limited to 1429 // read-only measurements without mutation. 1430 1431 // When modifying this logic, always verify using tests: 1432 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetUserSize 1433 1434#if MEASURE_DEBUG 1435 LOG(INFO) << "Measuring user " << userId; 1436#endif 1437 1438 struct stats stats; 1439 struct stats extStats; 1440 memset(&stats, 0, sizeof(stats)); 1441 memset(&extStats, 0, sizeof(extStats)); 1442 1443 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1444 1445 auto device = findQuotaDeviceForUuid(uuid); 1446 if (device.empty()) { 1447 flags &= ~FLAG_USE_QUOTA; 1448 } 1449 1450 if (flags & FLAG_USE_QUOTA) { 1451 struct dqblk dq; 1452 1453 ATRACE_BEGIN("obb"); 1454 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), AID_MEDIA_OBB, 1455 reinterpret_cast<char*>(&dq)) != 0) { 1456 if (errno != ESRCH) { 1457 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << AID_MEDIA_OBB; 1458 } 1459 } else { 1460#if MEASURE_DEBUG 1461 LOG(DEBUG) << "quotactl() for GID " << AID_MEDIA_OBB << " " << dq.dqb_curspace; 1462#endif 1463 extStats.codeSize += dq.dqb_curspace; 1464 } 1465 ATRACE_END(); 1466 1467 ATRACE_BEGIN("code"); 1468 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize, -1, -1, true); 1469 ATRACE_END(); 1470 1471 ATRACE_BEGIN("data"); 1472 auto cePath = create_data_user_ce_path(uuid_, userId); 1473 collectManualStatsForUser(cePath, &stats, true); 1474 auto dePath = create_data_user_de_path(uuid_, userId); 1475 collectManualStatsForUser(dePath, &stats, true); 1476 ATRACE_END(); 1477 1478 ATRACE_BEGIN("profile"); 1479 auto userProfilePath = create_primary_cur_profile_dir_path(userId); 1480 calculate_tree_size(userProfilePath, &stats.dataSize, -1, -1, true); 1481 auto refProfilePath = create_primary_ref_profile_dir_path(); 1482 calculate_tree_size(refProfilePath, &stats.codeSize, -1, -1, true); 1483 ATRACE_END(); 1484 1485 ATRACE_BEGIN("external"); 1486 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1487 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1488 reinterpret_cast<char*>(&dq)) != 0) { 1489 if (errno != ESRCH) { 1490 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1491 } 1492 } else { 1493#if MEASURE_DEBUG 1494 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1495#endif 1496 extStats.dataSize += dq.dqb_curspace; 1497 } 1498 ATRACE_END(); 1499 1500 ATRACE_BEGIN("dalvik"); 1501 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1502 -1, -1, true); 1503 calculate_tree_size(create_primary_cur_profile_dir_path(userId), &stats.dataSize, 1504 -1, -1, true); 1505 ATRACE_END(); 1506 1507 ATRACE_BEGIN("quota"); 1508 for (auto appId : appIds) { 1509 if (appId >= AID_APP_START) { 1510 collectQuotaStats(device, userId, appId, &stats, &extStats); 1511#if MEASURE_DEBUG 1512 // Sleep to make sure we don't lose logs 1513 usleep(1); 1514#endif 1515 } 1516 } 1517 ATRACE_END(); 1518 } else { 1519 ATRACE_BEGIN("obb"); 1520 auto obbPath = create_data_path(uuid_) + "/media/obb"; 1521 calculate_tree_size(obbPath, &extStats.codeSize); 1522 ATRACE_END(); 1523 1524 ATRACE_BEGIN("code"); 1525 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize); 1526 ATRACE_END(); 1527 1528 ATRACE_BEGIN("data"); 1529 auto cePath = create_data_user_ce_path(uuid_, userId); 1530 collectManualStatsForUser(cePath, &stats); 1531 auto dePath = create_data_user_de_path(uuid_, userId); 1532 collectManualStatsForUser(dePath, &stats); 1533 ATRACE_END(); 1534 1535 ATRACE_BEGIN("profile"); 1536 auto userProfilePath = create_primary_cur_profile_dir_path(userId); 1537 calculate_tree_size(userProfilePath, &stats.dataSize); 1538 auto refProfilePath = create_primary_ref_profile_dir_path(); 1539 calculate_tree_size(refProfilePath, &stats.codeSize); 1540 ATRACE_END(); 1541 1542 ATRACE_BEGIN("external"); 1543 auto dataMediaPath = create_data_media_path(uuid_, userId); 1544 collectManualExternalStatsForUser(dataMediaPath, &extStats); 1545#if MEASURE_DEBUG 1546 LOG(DEBUG) << "Measured external data " << extStats.dataSize << " cache " 1547 << extStats.cacheSize; 1548#endif 1549 ATRACE_END(); 1550 1551 ATRACE_BEGIN("dalvik"); 1552 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize); 1553 calculate_tree_size(create_primary_cur_profile_dir_path(userId), &stats.dataSize); 1554 ATRACE_END(); 1555 } 1556 1557 std::vector<int64_t> ret; 1558 ret.push_back(stats.codeSize); 1559 ret.push_back(stats.dataSize); 1560 ret.push_back(stats.cacheSize); 1561 ret.push_back(extStats.codeSize); 1562 ret.push_back(extStats.dataSize); 1563 ret.push_back(extStats.cacheSize); 1564#if MEASURE_DEBUG 1565 LOG(DEBUG) << "Final result " << toString(ret); 1566#endif 1567 *_aidl_return = ret; 1568 return ok(); 1569} 1570 1571binder::Status InstalldNativeService::getExternalSize(const std::unique_ptr<std::string>& uuid, 1572 int32_t userId, int32_t flags, std::vector<int64_t>* _aidl_return) { 1573 ENFORCE_UID(AID_SYSTEM); 1574 CHECK_ARGUMENT_UUID(uuid); 1575 // NOTE: Locking is relaxed on this method, since it's limited to 1576 // read-only measurements without mutation. 1577 1578 // When modifying this logic, always verify using tests: 1579 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetExternalSize 1580 1581#if MEASURE_DEBUG 1582 LOG(INFO) << "Measuring external " << userId; 1583#endif 1584 1585 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1586 1587 int64_t totalSize = 0; 1588 int64_t audioSize = 0; 1589 int64_t videoSize = 0; 1590 int64_t imageSize = 0; 1591 1592 auto device = findQuotaDeviceForUuid(uuid); 1593 if (device.empty()) { 1594 flags &= ~FLAG_USE_QUOTA; 1595 } 1596 1597 if (flags & FLAG_USE_QUOTA) { 1598 struct dqblk dq; 1599 1600 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1601 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1602 reinterpret_cast<char*>(&dq)) != 0) { 1603 if (errno != ESRCH) { 1604 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1605 } 1606 } else { 1607#if MEASURE_DEBUG 1608 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1609#endif 1610 totalSize = dq.dqb_curspace; 1611 } 1612 1613 gid_t audioGid = multiuser_get_uid(userId, AID_MEDIA_AUDIO); 1614 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), audioGid, 1615 reinterpret_cast<char*>(&dq)) == 0) { 1616#if MEASURE_DEBUG 1617 LOG(DEBUG) << "quotactl() for GID " << audioGid << " " << dq.dqb_curspace; 1618#endif 1619 audioSize = dq.dqb_curspace; 1620 } 1621 gid_t videoGid = multiuser_get_uid(userId, AID_MEDIA_VIDEO); 1622 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), videoGid, 1623 reinterpret_cast<char*>(&dq)) == 0) { 1624#if MEASURE_DEBUG 1625 LOG(DEBUG) << "quotactl() for GID " << videoGid << " " << dq.dqb_curspace; 1626#endif 1627 videoSize = dq.dqb_curspace; 1628 } 1629 gid_t imageGid = multiuser_get_uid(userId, AID_MEDIA_IMAGE); 1630 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), imageGid, 1631 reinterpret_cast<char*>(&dq)) == 0) { 1632#if MEASURE_DEBUG 1633 LOG(DEBUG) << "quotactl() for GID " << imageGid << " " << dq.dqb_curspace; 1634#endif 1635 imageSize = dq.dqb_curspace; 1636 } 1637 } else { 1638 FTS *fts; 1639 FTSENT *p; 1640 auto path = create_data_media_path(uuid_, userId); 1641 char *argv[] = { (char*) path.c_str(), nullptr }; 1642 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL))) { 1643 return error("Failed to fts_open " + path); 1644 } 1645 while ((p = fts_read(fts)) != NULL) { 1646 char* ext; 1647 int64_t size = (p->fts_statp->st_blocks * 512); 1648 switch (p->fts_info) { 1649 case FTS_F: 1650 // Only categorize files not belonging to apps 1651 if (p->fts_parent->fts_number == 0) { 1652 ext = strrchr(p->fts_name, '.'); 1653 if (ext != nullptr) { 1654 switch (MatchExtension(++ext)) { 1655 case AID_MEDIA_AUDIO: audioSize += size; break; 1656 case AID_MEDIA_VIDEO: videoSize += size; break; 1657 case AID_MEDIA_IMAGE: imageSize += size; break; 1658 } 1659 } 1660 } 1661 // Fall through to always count against total 1662 case FTS_D: 1663 // Ignore data belonging to specific apps 1664 p->fts_number = p->fts_parent->fts_number; 1665 if (p->fts_level == 1 && !strcmp(p->fts_name, "Android")) { 1666 p->fts_number = 1; 1667 } 1668 case FTS_DEFAULT: 1669 case FTS_SL: 1670 case FTS_SLNONE: 1671 totalSize += size; 1672 break; 1673 } 1674 } 1675 fts_close(fts); 1676 } 1677 1678 std::vector<int64_t> ret; 1679 ret.push_back(totalSize); 1680 ret.push_back(audioSize); 1681 ret.push_back(videoSize); 1682 ret.push_back(imageSize); 1683#if MEASURE_DEBUG 1684 LOG(DEBUG) << "Final result " << toString(ret); 1685#endif 1686 *_aidl_return = ret; 1687 return ok(); 1688} 1689 1690binder::Status InstalldNativeService::setAppQuota(const std::unique_ptr<std::string>& uuid, 1691 int32_t userId, int32_t appId, int64_t cacheQuota) { 1692 ENFORCE_UID(AID_SYSTEM); 1693 CHECK_ARGUMENT_UUID(uuid); 1694 std::lock_guard<std::recursive_mutex> lock(mCacheQuotasLock); 1695 1696 int32_t uid = multiuser_get_uid(userId, appId); 1697 mCacheQuotas[uid] = cacheQuota; 1698 1699 return ok(); 1700} 1701 1702// Dumps the contents of a profile file, using pkgname's dex files for pretty 1703// printing the result. 1704binder::Status InstalldNativeService::dumpProfiles(int32_t uid, const std::string& packageName, 1705 const std::string& codePaths, bool* _aidl_return) { 1706 ENFORCE_UID(AID_SYSTEM); 1707 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1708 std::lock_guard<std::recursive_mutex> lock(mLock); 1709 1710 const char* pkgname = packageName.c_str(); 1711 const char* code_paths = codePaths.c_str(); 1712 1713 *_aidl_return = dump_profiles(uid, pkgname, code_paths); 1714 return ok(); 1715} 1716 1717// TODO: Consider returning error codes. 1718binder::Status InstalldNativeService::mergeProfiles(int32_t uid, const std::string& packageName, 1719 bool* _aidl_return) { 1720 ENFORCE_UID(AID_SYSTEM); 1721 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1722 std::lock_guard<std::recursive_mutex> lock(mLock); 1723 1724 *_aidl_return = analyze_primary_profiles(uid, packageName); 1725 return ok(); 1726} 1727 1728binder::Status InstalldNativeService::dexopt(const std::string& apkPath, int32_t uid, 1729 const std::unique_ptr<std::string>& packageName, const std::string& instructionSet, 1730 int32_t dexoptNeeded, const std::unique_ptr<std::string>& outputPath, int32_t dexFlags, 1731 const std::string& compilerFilter, const std::unique_ptr<std::string>& uuid, 1732 const std::unique_ptr<std::string>& sharedLibraries) { 1733 ENFORCE_UID(AID_SYSTEM); 1734 CHECK_ARGUMENT_UUID(uuid); 1735 if (packageName && *packageName != "*") { 1736 CHECK_ARGUMENT_PACKAGE_NAME(*packageName); 1737 } 1738 std::lock_guard<std::recursive_mutex> lock(mLock); 1739 1740 const char* apk_path = apkPath.c_str(); 1741 const char* pkgname = packageName ? packageName->c_str() : "*"; 1742 const char* instruction_set = instructionSet.c_str(); 1743 const char* oat_dir = outputPath ? outputPath->c_str() : nullptr; 1744 const char* compiler_filter = compilerFilter.c_str(); 1745 const char* volume_uuid = uuid ? uuid->c_str() : nullptr; 1746 const char* shared_libraries = sharedLibraries ? sharedLibraries->c_str() : nullptr; 1747 1748 int res = android::installd::dexopt(apk_path, uid, pkgname, instruction_set, dexoptNeeded, 1749 oat_dir, dexFlags, compiler_filter, volume_uuid, shared_libraries); 1750 return res ? error(res, "Failed to dexopt") : ok(); 1751} 1752 1753binder::Status InstalldNativeService::markBootComplete(const std::string& instructionSet) { 1754 ENFORCE_UID(AID_SYSTEM); 1755 std::lock_guard<std::recursive_mutex> lock(mLock); 1756 1757 const char* instruction_set = instructionSet.c_str(); 1758 1759 char boot_marker_path[PKG_PATH_MAX]; 1760 sprintf(boot_marker_path, 1761 "%s/%s/%s/.booting", 1762 android_data_dir.path, 1763 DALVIK_CACHE, 1764 instruction_set); 1765 1766 ALOGV("mark_boot_complete : %s", boot_marker_path); 1767 if (unlink(boot_marker_path) != 0) { 1768 return error(StringPrintf("Failed to unlink %s", boot_marker_path)); 1769 } 1770 return ok(); 1771} 1772 1773void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid, 1774 struct stat* statbuf) 1775{ 1776 while (path[basepos] != 0) { 1777 if (path[basepos] == '/') { 1778 path[basepos] = 0; 1779 if (lstat(path, statbuf) < 0) { 1780 ALOGV("Making directory: %s\n", path); 1781 if (mkdir(path, mode) == 0) { 1782 chown(path, uid, gid); 1783 } else { 1784 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno)); 1785 } 1786 } 1787 path[basepos] = '/'; 1788 basepos++; 1789 } 1790 basepos++; 1791 } 1792} 1793 1794binder::Status InstalldNativeService::linkNativeLibraryDirectory( 1795 const std::unique_ptr<std::string>& uuid, const std::string& packageName, 1796 const std::string& nativeLibPath32, int32_t userId) { 1797 ENFORCE_UID(AID_SYSTEM); 1798 CHECK_ARGUMENT_UUID(uuid); 1799 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1800 std::lock_guard<std::recursive_mutex> lock(mLock); 1801 1802 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1803 const char* pkgname = packageName.c_str(); 1804 const char* asecLibDir = nativeLibPath32.c_str(); 1805 struct stat s, libStat; 1806 binder::Status res = ok(); 1807 1808 auto _pkgdir = create_data_user_ce_package_path(uuid_, userId, pkgname); 1809 auto _libsymlink = _pkgdir + PKG_LIB_POSTFIX; 1810 1811 const char* pkgdir = _pkgdir.c_str(); 1812 const char* libsymlink = _libsymlink.c_str(); 1813 1814 if (stat(pkgdir, &s) < 0) { 1815 return error("Failed to stat " + _pkgdir); 1816 } 1817 1818 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) { 1819 return error("Failed to chown " + _pkgdir); 1820 } 1821 1822 if (chmod(pkgdir, 0700) < 0) { 1823 res = error("Failed to chmod " + _pkgdir); 1824 goto out; 1825 } 1826 1827 if (lstat(libsymlink, &libStat) < 0) { 1828 if (errno != ENOENT) { 1829 res = error("Failed to stat " + _libsymlink); 1830 goto out; 1831 } 1832 } else { 1833 if (S_ISDIR(libStat.st_mode)) { 1834 if (delete_dir_contents(libsymlink, 1, NULL) < 0) { 1835 res = error("Failed to delete " + _libsymlink); 1836 goto out; 1837 } 1838 } else if (S_ISLNK(libStat.st_mode)) { 1839 if (unlink(libsymlink) < 0) { 1840 res = error("Failed to unlink " + _libsymlink); 1841 goto out; 1842 } 1843 } 1844 } 1845 1846 if (symlink(asecLibDir, libsymlink) < 0) { 1847 res = error("Failed to symlink " + _libsymlink + " to " + nativeLibPath32); 1848 goto out; 1849 } 1850 1851out: 1852 if (chmod(pkgdir, s.st_mode) < 0) { 1853 auto msg = "Failed to cleanup chmod " + _pkgdir; 1854 if (res.isOk()) { 1855 res = error(msg); 1856 } else { 1857 PLOG(ERROR) << msg; 1858 } 1859 } 1860 1861 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) { 1862 auto msg = "Failed to cleanup chown " + _pkgdir; 1863 if (res.isOk()) { 1864 res = error(msg); 1865 } else { 1866 PLOG(ERROR) << msg; 1867 } 1868 } 1869 1870 return res; 1871} 1872 1873static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd) 1874{ 1875 static const char *IDMAP_BIN = "/system/bin/idmap"; 1876 static const size_t MAX_INT_LEN = 32; 1877 char idmap_str[MAX_INT_LEN]; 1878 1879 snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd); 1880 1881 execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL); 1882 ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno)); 1883} 1884 1885// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix) 1886// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap 1887static int flatten_path(const char *prefix, const char *suffix, 1888 const char *overlay_path, char *idmap_path, size_t N) 1889{ 1890 if (overlay_path == NULL || idmap_path == NULL) { 1891 return -1; 1892 } 1893 const size_t len_overlay_path = strlen(overlay_path); 1894 // will access overlay_path + 1 further below; requires absolute path 1895 if (len_overlay_path < 2 || *overlay_path != '/') { 1896 return -1; 1897 } 1898 const size_t len_idmap_root = strlen(prefix); 1899 const size_t len_suffix = strlen(suffix); 1900 if (SIZE_MAX - len_idmap_root < len_overlay_path || 1901 SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) { 1902 // additions below would cause overflow 1903 return -1; 1904 } 1905 if (N < len_idmap_root + len_overlay_path + len_suffix) { 1906 return -1; 1907 } 1908 memset(idmap_path, 0, N); 1909 snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix); 1910 char *ch = idmap_path + len_idmap_root; 1911 while (*ch != '\0') { 1912 if (*ch == '/') { 1913 *ch = '@'; 1914 } 1915 ++ch; 1916 } 1917 return 0; 1918} 1919 1920binder::Status InstalldNativeService::idmap(const std::string& targetApkPath, 1921 const std::string& overlayApkPath, int32_t uid) { 1922 ENFORCE_UID(AID_SYSTEM); 1923 std::lock_guard<std::recursive_mutex> lock(mLock); 1924 1925 const char* target_apk = targetApkPath.c_str(); 1926 const char* overlay_apk = overlayApkPath.c_str(); 1927 ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid); 1928 1929 int idmap_fd = -1; 1930 char idmap_path[PATH_MAX]; 1931 1932 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1933 idmap_path, sizeof(idmap_path)) == -1) { 1934 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1935 goto fail; 1936 } 1937 1938 unlink(idmap_path); 1939 idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644); 1940 if (idmap_fd < 0) { 1941 ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno)); 1942 goto fail; 1943 } 1944 if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) { 1945 ALOGE("idmap cannot chown '%s'\n", idmap_path); 1946 goto fail; 1947 } 1948 if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { 1949 ALOGE("idmap cannot chmod '%s'\n", idmap_path); 1950 goto fail; 1951 } 1952 1953 pid_t pid; 1954 pid = fork(); 1955 if (pid == 0) { 1956 /* child -- drop privileges before continuing */ 1957 if (setgid(uid) != 0) { 1958 ALOGE("setgid(%d) failed during idmap\n", uid); 1959 exit(1); 1960 } 1961 if (setuid(uid) != 0) { 1962 ALOGE("setuid(%d) failed during idmap\n", uid); 1963 exit(1); 1964 } 1965 if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) { 1966 ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno)); 1967 exit(1); 1968 } 1969 1970 run_idmap(target_apk, overlay_apk, idmap_fd); 1971 exit(1); /* only if exec call to idmap failed */ 1972 } else { 1973 int status = wait_child(pid); 1974 if (status != 0) { 1975 ALOGE("idmap failed, status=0x%04x\n", status); 1976 goto fail; 1977 } 1978 } 1979 1980 close(idmap_fd); 1981 return ok(); 1982fail: 1983 if (idmap_fd >= 0) { 1984 close(idmap_fd); 1985 unlink(idmap_path); 1986 } 1987 return error(); 1988} 1989 1990binder::Status InstalldNativeService::removeIdmap(const std::string& overlayApkPath) { 1991 const char* overlay_apk = overlayApkPath.c_str(); 1992 char idmap_path[PATH_MAX]; 1993 1994 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1995 idmap_path, sizeof(idmap_path)) == -1) { 1996 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1997 return error(); 1998 } 1999 if (unlink(idmap_path) < 0) { 2000 ALOGE("couldn't unlink idmap file %s\n", idmap_path); 2001 return error(); 2002 } 2003 return ok(); 2004} 2005 2006binder::Status InstalldNativeService::restoreconAppData(const std::unique_ptr<std::string>& uuid, 2007 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 2008 const std::string& seInfo) { 2009 ENFORCE_UID(AID_SYSTEM); 2010 CHECK_ARGUMENT_UUID(uuid); 2011 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 2012 std::lock_guard<std::recursive_mutex> lock(mLock); 2013 2014 binder::Status res = ok(); 2015 2016 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here. 2017 unsigned int seflags = SELINUX_ANDROID_RESTORECON_RECURSE; 2018 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 2019 const char* pkgName = packageName.c_str(); 2020 const char* seinfo = seInfo.c_str(); 2021 2022 uid_t uid = multiuser_get_uid(userId, appId); 2023 if (flags & FLAG_STORAGE_CE) { 2024 auto path = create_data_user_ce_package_path(uuid_, userId, pkgName); 2025 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 2026 res = error("restorecon failed for " + path); 2027 } 2028 } 2029 if (flags & FLAG_STORAGE_DE) { 2030 auto path = create_data_user_de_package_path(uuid_, userId, pkgName); 2031 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 2032 res = error("restorecon failed for " + path); 2033 } 2034 } 2035 return res; 2036} 2037 2038binder::Status InstalldNativeService::createOatDir(const std::string& oatDir, 2039 const std::string& instructionSet) { 2040 ENFORCE_UID(AID_SYSTEM); 2041 std::lock_guard<std::recursive_mutex> lock(mLock); 2042 2043 const char* oat_dir = oatDir.c_str(); 2044 const char* instruction_set = instructionSet.c_str(); 2045 char oat_instr_dir[PKG_PATH_MAX]; 2046 2047 if (validate_apk_path(oat_dir)) { 2048 return error("Invalid path " + oatDir); 2049 } 2050 if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 2051 return error("Failed to prepare " + oatDir); 2052 } 2053 if (selinux_android_restorecon(oat_dir, 0)) { 2054 return error("Failed to restorecon " + oatDir); 2055 } 2056 snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set); 2057 if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 2058 return error(StringPrintf("Failed to prepare %s", oat_instr_dir)); 2059 } 2060 return ok(); 2061} 2062 2063binder::Status InstalldNativeService::rmPackageDir(const std::string& packageDir) { 2064 ENFORCE_UID(AID_SYSTEM); 2065 std::lock_guard<std::recursive_mutex> lock(mLock); 2066 2067 if (validate_apk_path(packageDir.c_str())) { 2068 return error("Invalid path " + packageDir); 2069 } 2070 if (delete_dir_contents_and_dir(packageDir) != 0) { 2071 return error("Failed to delete " + packageDir); 2072 } 2073 return ok(); 2074} 2075 2076binder::Status InstalldNativeService::linkFile(const std::string& relativePath, 2077 const std::string& fromBase, const std::string& toBase) { 2078 ENFORCE_UID(AID_SYSTEM); 2079 std::lock_guard<std::recursive_mutex> lock(mLock); 2080 2081 const char* relative_path = relativePath.c_str(); 2082 const char* from_base = fromBase.c_str(); 2083 const char* to_base = toBase.c_str(); 2084 char from_path[PKG_PATH_MAX]; 2085 char to_path[PKG_PATH_MAX]; 2086 snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path); 2087 snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path); 2088 2089 if (validate_apk_path_subdirs(from_path)) { 2090 return error(StringPrintf("Invalid from path %s", from_path)); 2091 } 2092 2093 if (validate_apk_path_subdirs(to_path)) { 2094 return error(StringPrintf("Invalid to path %s", to_path)); 2095 } 2096 2097 if (link(from_path, to_path) < 0) { 2098 return error(StringPrintf("Failed to link from %s to %s", from_path, to_path)); 2099 } 2100 2101 return ok(); 2102} 2103 2104binder::Status InstalldNativeService::moveAb(const std::string& apkPath, 2105 const std::string& instructionSet, const std::string& outputPath) { 2106 ENFORCE_UID(AID_SYSTEM); 2107 std::lock_guard<std::recursive_mutex> lock(mLock); 2108 2109 const char* apk_path = apkPath.c_str(); 2110 const char* instruction_set = instructionSet.c_str(); 2111 const char* oat_dir = outputPath.c_str(); 2112 2113 bool success = move_ab(apk_path, instruction_set, oat_dir); 2114 return success ? ok() : error(); 2115} 2116 2117binder::Status InstalldNativeService::deleteOdex(const std::string& apkPath, 2118 const std::string& instructionSet, const std::string& outputPath) { 2119 ENFORCE_UID(AID_SYSTEM); 2120 std::lock_guard<std::recursive_mutex> lock(mLock); 2121 2122 const char* apk_path = apkPath.c_str(); 2123 const char* instruction_set = instructionSet.c_str(); 2124 const char* oat_dir = outputPath.c_str(); 2125 2126 bool res = delete_odex(apk_path, instruction_set, oat_dir); 2127 return res ? ok() : error(); 2128} 2129 2130binder::Status InstalldNativeService::reconcileSecondaryDexFile( 2131 const std::string& dexPath, const std::string& packageName, int32_t uid, 2132 const std::vector<std::string>& isas, const std::unique_ptr<std::string>& volumeUuid, 2133 int32_t storage_flag, bool* _aidl_return) { 2134 ENFORCE_UID(AID_SYSTEM); 2135 CHECK_ARGUMENT_UUID(volumeUuid); 2136 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 2137 2138 std::lock_guard<std::recursive_mutex> lock(mLock); 2139 bool result = android::installd::reconcile_secondary_dex_file( 2140 dexPath, packageName, uid, isas, volumeUuid, storage_flag, _aidl_return); 2141 return result ? ok() : error(); 2142} 2143 2144binder::Status InstalldNativeService::invalidateMounts() { 2145 ENFORCE_UID(AID_SYSTEM); 2146 std::lock_guard<std::recursive_mutex> lock(mQuotaDevicesLock); 2147 2148 mQuotaDevices.clear(); 2149 2150 std::ifstream in("/proc/mounts"); 2151 if (!in.is_open()) { 2152 return error("Failed to read mounts"); 2153 } 2154 2155 std::string source; 2156 std::string target; 2157 std::string ignored; 2158 struct dqblk dq; 2159 while (!in.eof()) { 2160 std::getline(in, source, ' '); 2161 std::getline(in, target, ' '); 2162 std::getline(in, ignored); 2163 2164 if (source.compare(0, 11, "/dev/block/") == 0) { 2165 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), source.c_str(), 0, 2166 reinterpret_cast<char*>(&dq)) == 0) { 2167 LOG(DEBUG) << "Found " << source << " with quota"; 2168 mQuotaDevices[target] = source; 2169 2170 // ext4 only enables DQUOT_USAGE_ENABLED by default, so we 2171 // need to kick it again to enable DQUOT_LIMITS_ENABLED. 2172 if (quotactl(QCMD(Q_QUOTAON, USRQUOTA), source.c_str(), QFMT_VFS_V1, nullptr) != 0 2173 && errno != EBUSY) { 2174 PLOG(ERROR) << "Failed to enable USRQUOTA on " << source; 2175 } 2176 if (quotactl(QCMD(Q_QUOTAON, GRPQUOTA), source.c_str(), QFMT_VFS_V1, nullptr) != 0 2177 && errno != EBUSY) { 2178 PLOG(ERROR) << "Failed to enable GRPQUOTA on " << source; 2179 } 2180 } 2181 } 2182 } 2183 return ok(); 2184} 2185 2186std::string InstalldNativeService::findQuotaDeviceForUuid( 2187 const std::unique_ptr<std::string>& uuid) { 2188 std::lock_guard<std::recursive_mutex> lock(mQuotaDevicesLock); 2189 auto path = create_data_path(uuid ? uuid->c_str() : nullptr); 2190 return mQuotaDevices[path]; 2191} 2192 2193binder::Status InstalldNativeService::isQuotaSupported( 2194 const std::unique_ptr<std::string>& volumeUuid, bool* _aidl_return) { 2195 *_aidl_return = !findQuotaDeviceForUuid(volumeUuid).empty(); 2196 return ok(); 2197} 2198 2199} // namespace installd 2200} // namespace android 2201