InstalldNativeService.cpp revision 249f2d3e018bd98eba74c3184b80bc91b04281cd
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 restorecon_app_data_lazy(path, "cache", seInfo, uid, existing) || 400 restorecon_app_data_lazy(path, "code_cache", seInfo, uid, existing)) { 401 return error("Failed to restorecon " + path); 402 } 403 404 if (prepare_app_quota(uuid, findQuotaDeviceForUuid(uuid), uid)) { 405 return error("Failed to set hard quota " + path); 406 } 407 408 if (property_get_bool("dalvik.vm.usejitprofiles", false)) { 409 const std::string profile_dir = 410 create_primary_current_profile_package_dir_path(userId, pkgname); 411 // read-write-execute only for the app user. 412 if (fs_prepare_dir_strict(profile_dir.c_str(), 0700, uid, uid) != 0) { 413 return error("Failed to prepare " + profile_dir); 414 } 415 const std::string profile_file = create_current_profile_path(userId, pkgname, 416 /*is_secondary_dex*/false); 417 // read-write only for the app user. 418 if (fs_prepare_file_strict(profile_file.c_str(), 0600, uid, uid) != 0) { 419 return error("Failed to prepare " + profile_file); 420 } 421 const std::string ref_profile_path = 422 create_primary_reference_profile_package_dir_path(pkgname); 423 // dex2oat/profman runs under the shared app gid and it needs to read/write reference 424 // profiles. 425 int shared_app_gid = multiuser_get_shared_gid(0, appId); 426 if ((shared_app_gid != -1) && fs_prepare_dir_strict( 427 ref_profile_path.c_str(), 0700, shared_app_gid, shared_app_gid) != 0) { 428 return error("Failed to prepare " + ref_profile_path); 429 } 430 } 431 } 432 return ok(); 433} 434 435binder::Status InstalldNativeService::migrateAppData(const std::unique_ptr<std::string>& uuid, 436 const std::string& packageName, int32_t userId, int32_t flags) { 437 ENFORCE_UID(AID_SYSTEM); 438 CHECK_ARGUMENT_UUID(uuid); 439 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 440 std::lock_guard<std::recursive_mutex> lock(mLock); 441 442 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 443 const char* pkgname = packageName.c_str(); 444 445 // This method only exists to upgrade system apps that have requested 446 // forceDeviceEncrypted, so their default storage always lives in a 447 // consistent location. This only works on non-FBE devices, since we 448 // never want to risk exposing data on a device with real CE/DE storage. 449 450 auto ce_path = create_data_user_ce_package_path(uuid_, userId, pkgname); 451 auto de_path = create_data_user_de_package_path(uuid_, userId, pkgname); 452 453 // If neither directory is marked as default, assume CE is default 454 if (getxattr(ce_path.c_str(), kXattrDefault, nullptr, 0) == -1 455 && getxattr(de_path.c_str(), kXattrDefault, nullptr, 0) == -1) { 456 if (setxattr(ce_path.c_str(), kXattrDefault, nullptr, 0, 0) != 0) { 457 return error("Failed to mark default storage " + ce_path); 458 } 459 } 460 461 // Migrate default data location if needed 462 auto target = (flags & FLAG_STORAGE_DE) ? de_path : ce_path; 463 auto source = (flags & FLAG_STORAGE_DE) ? ce_path : de_path; 464 465 if (getxattr(target.c_str(), kXattrDefault, nullptr, 0) == -1) { 466 LOG(WARNING) << "Requested default storage " << target 467 << " is not active; migrating from " << source; 468 if (delete_dir_contents_and_dir(target) != 0) { 469 return error("Failed to delete " + target); 470 } 471 if (rename(source.c_str(), target.c_str()) != 0) { 472 return error("Failed to rename " + source + " to " + target); 473 } 474 } 475 476 return ok(); 477} 478 479 480binder::Status InstalldNativeService::clearAppProfiles(const std::string& packageName) { 481 ENFORCE_UID(AID_SYSTEM); 482 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 483 std::lock_guard<std::recursive_mutex> lock(mLock); 484 485 binder::Status res = ok(); 486 if (!clear_primary_reference_profile(packageName)) { 487 res = error("Failed to clear reference profile for " + packageName); 488 } 489 if (!clear_primary_current_profiles(packageName)) { 490 res = error("Failed to clear current profiles for " + packageName); 491 } 492 return res; 493} 494 495binder::Status InstalldNativeService::clearAppData(const std::unique_ptr<std::string>& uuid, 496 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 497 ENFORCE_UID(AID_SYSTEM); 498 CHECK_ARGUMENT_UUID(uuid); 499 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 500 std::lock_guard<std::recursive_mutex> lock(mLock); 501 502 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 503 const char* pkgname = packageName.c_str(); 504 505 binder::Status res = ok(); 506 if (flags & FLAG_STORAGE_CE) { 507 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 508 if (flags & FLAG_CLEAR_CACHE_ONLY) { 509 path = read_path_inode(path, "cache", kXattrInodeCache); 510 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 511 path = read_path_inode(path, "code_cache", kXattrInodeCodeCache); 512 } 513 if (access(path.c_str(), F_OK) == 0) { 514 if (delete_dir_contents(path) != 0) { 515 res = error("Failed to delete contents of " + path); 516 } 517 } 518 } 519 if (flags & FLAG_STORAGE_DE) { 520 std::string suffix = ""; 521 bool only_cache = false; 522 if (flags & FLAG_CLEAR_CACHE_ONLY) { 523 suffix = CACHE_DIR_POSTFIX; 524 only_cache = true; 525 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 526 suffix = CODE_CACHE_DIR_POSTFIX; 527 only_cache = true; 528 } 529 530 auto path = create_data_user_de_package_path(uuid_, userId, pkgname) + suffix; 531 if (access(path.c_str(), F_OK) == 0) { 532 if (delete_dir_contents(path) != 0) { 533 res = error("Failed to delete contents of " + path); 534 } 535 } 536 if (!only_cache) { 537 if (!clear_primary_current_profile(packageName, userId)) { 538 res = error("Failed to clear current profile for " + packageName); 539 } 540 } 541 } 542 return res; 543} 544 545static int destroy_app_reference_profile(const std::string& pkgname) { 546 return delete_dir_contents_and_dir( 547 create_primary_reference_profile_package_dir_path(pkgname), 548 /*ignore_if_missing*/ true); 549} 550 551static int destroy_app_current_profiles(const std::string& pkgname, userid_t userid) { 552 return delete_dir_contents_and_dir( 553 create_primary_current_profile_package_dir_path(userid, pkgname), 554 /*ignore_if_missing*/ true); 555} 556 557binder::Status InstalldNativeService::destroyAppProfiles(const std::string& packageName) { 558 ENFORCE_UID(AID_SYSTEM); 559 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 560 std::lock_guard<std::recursive_mutex> lock(mLock); 561 562 binder::Status res = ok(); 563 std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr); 564 for (auto user : users) { 565 if (destroy_app_current_profiles(packageName, user) != 0) { 566 res = error("Failed to destroy current profiles for " + packageName); 567 } 568 } 569 if (destroy_app_reference_profile(packageName) != 0) { 570 res = error("Failed to destroy reference profile for " + packageName); 571 } 572 return res; 573} 574 575binder::Status InstalldNativeService::destroyAppData(const std::unique_ptr<std::string>& uuid, 576 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 577 ENFORCE_UID(AID_SYSTEM); 578 CHECK_ARGUMENT_UUID(uuid); 579 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 580 std::lock_guard<std::recursive_mutex> lock(mLock); 581 582 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 583 const char* pkgname = packageName.c_str(); 584 585 binder::Status res = ok(); 586 if (flags & FLAG_STORAGE_CE) { 587 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 588 if (delete_dir_contents_and_dir(path) != 0) { 589 res = error("Failed to delete " + path); 590 } 591 } 592 if (flags & FLAG_STORAGE_DE) { 593 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 594 if (delete_dir_contents_and_dir(path) != 0) { 595 res = error("Failed to delete " + path); 596 } 597 destroy_app_current_profiles(packageName, userId); 598 // TODO(calin): If the package is still installed by other users it's probably 599 // beneficial to keep the reference profile around. 600 // Verify if it's ok to do that. 601 destroy_app_reference_profile(packageName); 602 } 603 return res; 604} 605 606static gid_t get_cache_gid(uid_t uid) { 607 int32_t gid = multiuser_get_cache_gid(multiuser_get_user_id(uid), multiuser_get_app_id(uid)); 608 return (gid != -1) ? gid : uid; 609} 610 611binder::Status InstalldNativeService::fixupAppData(const std::unique_ptr<std::string>& uuid, 612 int32_t flags) { 613 ENFORCE_UID(AID_SYSTEM); 614 CHECK_ARGUMENT_UUID(uuid); 615 std::lock_guard<std::recursive_mutex> lock(mLock); 616 617 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 618 for (auto user : get_known_users(uuid_)) { 619 ATRACE_BEGIN("fixup user"); 620 FTS* fts; 621 FTSENT* p; 622 auto ce_path = create_data_user_ce_path(uuid_, user); 623 auto de_path = create_data_user_de_path(uuid_, user); 624 char *argv[] = { (char*) ce_path.c_str(), (char*) de_path.c_str(), nullptr }; 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 auto ce_path = create_data_user_ce_path(uuid_, user); 954 auto de_path = create_data_user_de_path(uuid_, user); 955 char *argv[] = { (char*) ce_path.c_str(), (char*) de_path.c_str(), nullptr }; 956 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL))) { 957 return error("Failed to fts_open"); 958 } 959 while ((p = fts_read(fts)) != NULL) { 960 if (p->fts_info == FTS_D && p->fts_level == 1) { 961 uid_t uid = p->fts_statp->st_uid; 962 auto search = trackers.find(uid); 963 if (search != trackers.end()) { 964 search->second->addDataPath(p->fts_path); 965 } else { 966 auto tracker = std::shared_ptr<CacheTracker>(new CacheTracker( 967 multiuser_get_user_id(uid), multiuser_get_app_id(uid), device)); 968 tracker->addDataPath(p->fts_path); 969 { 970 std::lock_guard<std::recursive_mutex> lock(mCacheQuotasLock); 971 tracker->cacheQuota = mCacheQuotas[uid]; 972 } 973 if (tracker->cacheQuota == 0) { 974#if MEASURE_DEBUG 975 LOG(WARNING) << "UID " << uid << " has no cache quota; assuming 64MB"; 976#endif 977 tracker->cacheQuota = 67108864; 978 } 979 trackers[uid] = tracker; 980 } 981 fts_set(fts, p, FTS_SKIP); 982 } 983 } 984 fts_close(fts); 985 } 986 ATRACE_END(); 987 988 // 2. Populate tracker stats and insert into priority queue 989 ATRACE_BEGIN("populate"); 990 auto cmp = [](std::shared_ptr<CacheTracker> left, std::shared_ptr<CacheTracker> right) { 991 return (left->getCacheRatio() < right->getCacheRatio()); 992 }; 993 std::priority_queue<std::shared_ptr<CacheTracker>, 994 std::vector<std::shared_ptr<CacheTracker>>, decltype(cmp)> queue(cmp); 995 for (const auto& it : trackers) { 996 it.second->loadStats(); 997 queue.push(it.second); 998 } 999 ATRACE_END(); 1000 1001 // 3. Bounce across the queue, freeing items from whichever tracker is 1002 // the most over their assigned quota 1003 ATRACE_BEGIN("bounce"); 1004 std::shared_ptr<CacheTracker> active; 1005 while (active || !queue.empty()) { 1006 // Only look at apps under quota when explicitly requested 1007 if (active && (active->getCacheRatio() < 10000) 1008 && !(flags & FLAG_FREE_CACHE_V2_DEFY_QUOTA)) { 1009 LOG(DEBUG) << "Active ratio " << active->getCacheRatio() 1010 << " isn't over quota, and defy not requested"; 1011 break; 1012 } 1013 1014 // Find the best tracker to work with; this might involve swapping 1015 // if the active tracker is no longer the most over quota 1016 bool nextBetter = active && !queue.empty() 1017 && active->getCacheRatio() < queue.top()->getCacheRatio(); 1018 if (!active || nextBetter) { 1019 if (active) { 1020 // Current tracker still has items, so we'll consider it 1021 // again later once it bubbles up to surface 1022 queue.push(active); 1023 } 1024 active = queue.top(); queue.pop(); 1025 active->ensureItems(); 1026 continue; 1027 } 1028 1029 // If no items remain, go find another tracker 1030 if (active->items.empty()) { 1031 active = nullptr; 1032 continue; 1033 } else { 1034 auto item = active->items.back(); 1035 active->items.pop_back(); 1036 1037 LOG(DEBUG) << "Purging " << item->toString() << " from " << active->toString(); 1038 if (!noop) { 1039 item->purge(); 1040 } 1041 active->cacheUsed -= item->size; 1042 needed -= item->size; 1043 } 1044 1045 // Verify that we're actually done before bailing, since sneaky 1046 // apps might be using hardlinks 1047 if (needed <= 0) { 1048 free = data_disk_free(data_path); 1049 needed = freeStorageSize - free; 1050 if (needed <= 0) { 1051 break; 1052 } else { 1053 LOG(WARNING) << "Expected to be done but still need " << needed; 1054 } 1055 } 1056 } 1057 ATRACE_END(); 1058 1059 } else { 1060 return error("Legacy cache logic no longer supported"); 1061 } 1062 1063 free = data_disk_free(data_path); 1064 if (free >= freeStorageSize) { 1065 return ok(); 1066 } else { 1067 return error(StringPrintf("Failed to free up %" PRId64 " on %s; final free space %" PRId64, 1068 freeStorageSize, data_path.c_str(), free)); 1069 } 1070} 1071 1072binder::Status InstalldNativeService::rmdex(const std::string& codePath, 1073 const std::string& instructionSet) { 1074 ENFORCE_UID(AID_SYSTEM); 1075 std::lock_guard<std::recursive_mutex> lock(mLock); 1076 1077 char dex_path[PKG_PATH_MAX]; 1078 1079 const char* path = codePath.c_str(); 1080 const char* instruction_set = instructionSet.c_str(); 1081 1082 if (validate_apk_path(path) && validate_system_app_path(path)) { 1083 return error("Invalid path " + codePath); 1084 } 1085 1086 if (!create_cache_path(dex_path, path, instruction_set)) { 1087 return error("Failed to create cache path for " + codePath); 1088 } 1089 1090 ALOGV("unlink %s\n", dex_path); 1091 if (unlink(dex_path) < 0) { 1092 // It's ok if we don't have a dalvik cache path. Report error only when the path exists 1093 // but could not be unlinked. 1094 if (errno != ENOENT) { 1095 return error(StringPrintf("Failed to unlink %s", dex_path)); 1096 } 1097 } 1098 return ok(); 1099} 1100 1101struct stats { 1102 int64_t codeSize; 1103 int64_t dataSize; 1104 int64_t cacheSize; 1105}; 1106 1107#if MEASURE_DEBUG 1108static std::string toString(std::vector<int64_t> values) { 1109 std::stringstream res; 1110 res << "["; 1111 for (size_t i = 0; i < values.size(); i++) { 1112 res << values[i]; 1113 if (i < values.size() - 1) { 1114 res << ","; 1115 } 1116 } 1117 res << "]"; 1118 return res.str(); 1119} 1120#endif 1121 1122static void collectQuotaStats(const std::string& device, int32_t userId, 1123 int32_t appId, struct stats* stats, struct stats* extStats) { 1124 if (device.empty()) return; 1125 1126 struct dqblk dq; 1127 1128 if (stats != nullptr) { 1129 uid_t uid = multiuser_get_uid(userId, appId); 1130 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1131 reinterpret_cast<char*>(&dq)) != 0) { 1132 if (errno != ESRCH) { 1133 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1134 } 1135 } else { 1136#if MEASURE_DEBUG 1137 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1138#endif 1139 stats->dataSize += dq.dqb_curspace; 1140 } 1141 1142 int cacheGid = multiuser_get_cache_gid(userId, appId); 1143 if (cacheGid != -1) { 1144 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), cacheGid, 1145 reinterpret_cast<char*>(&dq)) != 0) { 1146 if (errno != ESRCH) { 1147 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << cacheGid; 1148 } 1149 } else { 1150#if MEASURE_DEBUG 1151 LOG(DEBUG) << "quotactl() for GID " << cacheGid << " " << dq.dqb_curspace; 1152#endif 1153 stats->cacheSize += dq.dqb_curspace; 1154 } 1155 } 1156 1157 int sharedGid = multiuser_get_shared_gid(0, appId); 1158 if (sharedGid != -1) { 1159 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), sharedGid, 1160 reinterpret_cast<char*>(&dq)) != 0) { 1161 if (errno != ESRCH) { 1162 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << sharedGid; 1163 } 1164 } else { 1165#if MEASURE_DEBUG 1166 LOG(DEBUG) << "quotactl() for GID " << sharedGid << " " << dq.dqb_curspace; 1167#endif 1168 stats->codeSize += dq.dqb_curspace; 1169 } 1170 } 1171 } 1172 1173 if (extStats != nullptr) { 1174 int extGid = multiuser_get_ext_gid(userId, appId); 1175 if (extGid != -1) { 1176 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), extGid, 1177 reinterpret_cast<char*>(&dq)) != 0) { 1178 if (errno != ESRCH) { 1179 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << extGid; 1180 } 1181 } else { 1182#if MEASURE_DEBUG 1183 LOG(DEBUG) << "quotactl() for GID " << extGid << " " << dq.dqb_curspace; 1184#endif 1185 extStats->dataSize += dq.dqb_curspace; 1186 } 1187 } 1188 1189 int extCacheGid = multiuser_get_ext_cache_gid(userId, appId); 1190 if (extCacheGid != -1) { 1191 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), extCacheGid, 1192 reinterpret_cast<char*>(&dq)) != 0) { 1193 if (errno != ESRCH) { 1194 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << extCacheGid; 1195 } 1196 } else { 1197#if MEASURE_DEBUG 1198 LOG(DEBUG) << "quotactl() for GID " << extCacheGid << " " << dq.dqb_curspace; 1199#endif 1200 extStats->dataSize += dq.dqb_curspace; 1201 extStats->cacheSize += dq.dqb_curspace; 1202 } 1203 } 1204 } 1205} 1206 1207static void collectManualStats(const std::string& path, struct stats* stats) { 1208 DIR *d; 1209 int dfd; 1210 struct dirent *de; 1211 struct stat s; 1212 1213 d = opendir(path.c_str()); 1214 if (d == nullptr) { 1215 if (errno != ENOENT) { 1216 PLOG(WARNING) << "Failed to open " << path; 1217 } 1218 return; 1219 } 1220 dfd = dirfd(d); 1221 while ((de = readdir(d))) { 1222 const char *name = de->d_name; 1223 1224 int64_t size = 0; 1225 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 1226 size = s.st_blocks * 512; 1227 } 1228 1229 if (de->d_type == DT_DIR) { 1230 if (!strcmp(name, ".")) { 1231 // Don't recurse, but still count node size 1232 } else if (!strcmp(name, "..")) { 1233 // Don't recurse or count node size 1234 continue; 1235 } else { 1236 // Measure all children nodes 1237 size = 0; 1238 calculate_tree_size(StringPrintf("%s/%s", path.c_str(), name), &size); 1239 } 1240 1241 if (!strcmp(name, "cache") || !strcmp(name, "code_cache")) { 1242 stats->cacheSize += size; 1243 } 1244 } 1245 1246 // Legacy symlink isn't owned by app 1247 if (de->d_type == DT_LNK && !strcmp(name, "lib")) { 1248 continue; 1249 } 1250 1251 // Everything found inside is considered data 1252 stats->dataSize += size; 1253 } 1254 closedir(d); 1255} 1256 1257static void collectManualStatsForUser(const std::string& path, struct stats* stats, 1258 bool exclude_apps = false) { 1259 DIR *d; 1260 int dfd; 1261 struct dirent *de; 1262 struct stat s; 1263 1264 d = opendir(path.c_str()); 1265 if (d == nullptr) { 1266 if (errno != ENOENT) { 1267 PLOG(WARNING) << "Failed to open " << path; 1268 } 1269 return; 1270 } 1271 dfd = dirfd(d); 1272 while ((de = readdir(d))) { 1273 if (de->d_type == DT_DIR) { 1274 const char *name = de->d_name; 1275 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) != 0) { 1276 continue; 1277 } 1278 int32_t user_uid = multiuser_get_app_id(s.st_uid); 1279 if (!strcmp(name, ".") || !strcmp(name, "..")) { 1280 continue; 1281 } else if (exclude_apps && (user_uid >= AID_APP_START && user_uid <= AID_APP_END)) { 1282 continue; 1283 } else { 1284 collectManualStats(StringPrintf("%s/%s", path.c_str(), name), stats); 1285 } 1286 } 1287 } 1288 closedir(d); 1289} 1290 1291static void collectManualExternalStatsForUser(const std::string& path, struct stats* stats) { 1292 FTS *fts; 1293 FTSENT *p; 1294 char *argv[] = { (char*) path.c_str(), nullptr }; 1295 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL))) { 1296 PLOG(ERROR) << "Failed to fts_open " << path; 1297 return; 1298 } 1299 while ((p = fts_read(fts)) != NULL) { 1300 p->fts_number = p->fts_parent->fts_number; 1301 switch (p->fts_info) { 1302 case FTS_D: 1303 if (p->fts_level == 4 1304 && !strcmp(p->fts_name, "cache") 1305 && !strcmp(p->fts_parent->fts_parent->fts_name, "data") 1306 && !strcmp(p->fts_parent->fts_parent->fts_parent->fts_name, "Android")) { 1307 p->fts_number = 1; 1308 } 1309 // Fall through to count the directory 1310 case FTS_DEFAULT: 1311 case FTS_F: 1312 case FTS_SL: 1313 case FTS_SLNONE: 1314 int64_t size = (p->fts_statp->st_blocks * 512); 1315 if (p->fts_number == 1) { 1316 stats->cacheSize += size; 1317 } 1318 stats->dataSize += size; 1319 break; 1320 } 1321 } 1322 fts_close(fts); 1323} 1324 1325binder::Status InstalldNativeService::getAppSize(const std::unique_ptr<std::string>& uuid, 1326 const std::vector<std::string>& packageNames, int32_t userId, int32_t flags, 1327 int32_t appId, const std::vector<int64_t>& ceDataInodes, 1328 const std::vector<std::string>& codePaths, std::vector<int64_t>* _aidl_return) { 1329 ENFORCE_UID(AID_SYSTEM); 1330 CHECK_ARGUMENT_UUID(uuid); 1331 for (auto packageName : packageNames) { 1332 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1333 } 1334 // NOTE: Locking is relaxed on this method, since it's limited to 1335 // read-only measurements without mutation. 1336 1337 // When modifying this logic, always verify using tests: 1338 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetAppSize 1339 1340#if MEASURE_DEBUG 1341 LOG(INFO) << "Measuring user " << userId << " app " << appId; 1342#endif 1343 1344 // Here's a summary of the common storage locations across the platform, 1345 // and how they're each tagged: 1346 // 1347 // /data/app/com.example UID system 1348 // /data/app/com.example/oat UID system 1349 // /data/user/0/com.example UID u0_a10 GID u0_a10 1350 // /data/user/0/com.example/cache UID u0_a10 GID u0_a10_cache 1351 // /data/media/0/foo.txt UID u0_media_rw 1352 // /data/media/0/bar.jpg UID u0_media_rw GID u0_media_image 1353 // /data/media/0/Android/data/com.example UID u0_media_rw GID u0_a10_ext 1354 // /data/media/0/Android/data/com.example/cache UID u0_media_rw GID u0_a10_ext_cache 1355 // /data/media/obb/com.example UID system 1356 1357 struct stats stats; 1358 struct stats extStats; 1359 memset(&stats, 0, sizeof(stats)); 1360 memset(&extStats, 0, sizeof(extStats)); 1361 1362 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1363 1364 auto device = findQuotaDeviceForUuid(uuid); 1365 if (device.empty()) { 1366 flags &= ~FLAG_USE_QUOTA; 1367 } 1368 1369 ATRACE_BEGIN("obb"); 1370 for (auto packageName : packageNames) { 1371 auto obbCodePath = create_data_media_obb_path(uuid_, packageName.c_str()); 1372 calculate_tree_size(obbCodePath, &extStats.codeSize); 1373 } 1374 ATRACE_END(); 1375 1376 if (flags & FLAG_USE_QUOTA && appId >= AID_APP_START) { 1377 ATRACE_BEGIN("code"); 1378 for (auto codePath : codePaths) { 1379 calculate_tree_size(codePath, &stats.codeSize, -1, 1380 multiuser_get_shared_gid(0, appId)); 1381 } 1382 ATRACE_END(); 1383 1384 ATRACE_BEGIN("quota"); 1385 collectQuotaStats(device, userId, appId, &stats, &extStats); 1386 ATRACE_END(); 1387 } else { 1388 ATRACE_BEGIN("code"); 1389 for (auto codePath : codePaths) { 1390 calculate_tree_size(codePath, &stats.codeSize); 1391 } 1392 ATRACE_END(); 1393 1394 for (size_t i = 0; i < packageNames.size(); i++) { 1395 const char* pkgname = packageNames[i].c_str(); 1396 1397 ATRACE_BEGIN("data"); 1398 auto cePath = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInodes[i]); 1399 collectManualStats(cePath, &stats); 1400 auto dePath = create_data_user_de_package_path(uuid_, userId, pkgname); 1401 collectManualStats(dePath, &stats); 1402 ATRACE_END(); 1403 1404 if (!uuid) { 1405 ATRACE_BEGIN("profiles"); 1406 calculate_tree_size( 1407 create_primary_current_profile_package_dir_path(userId, pkgname), 1408 &stats.dataSize); 1409 calculate_tree_size( 1410 create_primary_reference_profile_package_dir_path(pkgname), 1411 &stats.codeSize); 1412 ATRACE_END(); 1413 } 1414 1415 ATRACE_BEGIN("external"); 1416 auto extPath = create_data_media_package_path(uuid_, userId, "data", pkgname); 1417 collectManualStats(extPath, &extStats); 1418 auto mediaPath = create_data_media_package_path(uuid_, userId, "media", pkgname); 1419 calculate_tree_size(mediaPath, &extStats.dataSize); 1420 ATRACE_END(); 1421 } 1422 1423 if (!uuid) { 1424 ATRACE_BEGIN("dalvik"); 1425 int32_t sharedGid = multiuser_get_shared_gid(0, appId); 1426 if (sharedGid != -1) { 1427 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1428 sharedGid, -1); 1429 } 1430 ATRACE_END(); 1431 } 1432 } 1433 1434 std::vector<int64_t> ret; 1435 ret.push_back(stats.codeSize); 1436 ret.push_back(stats.dataSize); 1437 ret.push_back(stats.cacheSize); 1438 ret.push_back(extStats.codeSize); 1439 ret.push_back(extStats.dataSize); 1440 ret.push_back(extStats.cacheSize); 1441#if MEASURE_DEBUG 1442 LOG(DEBUG) << "Final result " << toString(ret); 1443#endif 1444 *_aidl_return = ret; 1445 return ok(); 1446} 1447 1448binder::Status InstalldNativeService::getUserSize(const std::unique_ptr<std::string>& uuid, 1449 int32_t userId, int32_t flags, const std::vector<int32_t>& appIds, 1450 std::vector<int64_t>* _aidl_return) { 1451 ENFORCE_UID(AID_SYSTEM); 1452 CHECK_ARGUMENT_UUID(uuid); 1453 // NOTE: Locking is relaxed on this method, since it's limited to 1454 // read-only measurements without mutation. 1455 1456 // When modifying this logic, always verify using tests: 1457 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetUserSize 1458 1459#if MEASURE_DEBUG 1460 LOG(INFO) << "Measuring user " << userId; 1461#endif 1462 1463 struct stats stats; 1464 struct stats extStats; 1465 memset(&stats, 0, sizeof(stats)); 1466 memset(&extStats, 0, sizeof(extStats)); 1467 1468 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1469 1470 auto device = findQuotaDeviceForUuid(uuid); 1471 if (device.empty()) { 1472 flags &= ~FLAG_USE_QUOTA; 1473 } 1474 1475 if (flags & FLAG_USE_QUOTA) { 1476 struct dqblk dq; 1477 1478 ATRACE_BEGIN("obb"); 1479 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), AID_MEDIA_OBB, 1480 reinterpret_cast<char*>(&dq)) != 0) { 1481 if (errno != ESRCH) { 1482 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << AID_MEDIA_OBB; 1483 } 1484 } else { 1485#if MEASURE_DEBUG 1486 LOG(DEBUG) << "quotactl() for GID " << AID_MEDIA_OBB << " " << dq.dqb_curspace; 1487#endif 1488 extStats.codeSize += dq.dqb_curspace; 1489 } 1490 ATRACE_END(); 1491 1492 ATRACE_BEGIN("code"); 1493 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize, -1, -1, true); 1494 ATRACE_END(); 1495 1496 ATRACE_BEGIN("data"); 1497 auto cePath = create_data_user_ce_path(uuid_, userId); 1498 collectManualStatsForUser(cePath, &stats, true); 1499 auto dePath = create_data_user_de_path(uuid_, userId); 1500 collectManualStatsForUser(dePath, &stats, true); 1501 ATRACE_END(); 1502 1503 if (!uuid) { 1504 ATRACE_BEGIN("profile"); 1505 auto userProfilePath = create_primary_cur_profile_dir_path(userId); 1506 calculate_tree_size(userProfilePath, &stats.dataSize, -1, -1, true); 1507 auto refProfilePath = create_primary_ref_profile_dir_path(); 1508 calculate_tree_size(refProfilePath, &stats.codeSize, -1, -1, true); 1509 ATRACE_END(); 1510 } 1511 1512 ATRACE_BEGIN("external"); 1513 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1514 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1515 reinterpret_cast<char*>(&dq)) != 0) { 1516 if (errno != ESRCH) { 1517 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1518 } 1519 } else { 1520#if MEASURE_DEBUG 1521 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1522#endif 1523 extStats.dataSize += dq.dqb_curspace; 1524 } 1525 ATRACE_END(); 1526 1527 if (!uuid) { 1528 ATRACE_BEGIN("dalvik"); 1529 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1530 -1, -1, true); 1531 calculate_tree_size(create_primary_cur_profile_dir_path(userId), &stats.dataSize, 1532 -1, -1, true); 1533 ATRACE_END(); 1534 } 1535 1536 ATRACE_BEGIN("quota"); 1537 int64_t dataSize = extStats.dataSize; 1538 for (auto appId : appIds) { 1539 if (appId >= AID_APP_START) { 1540 collectQuotaStats(device, userId, appId, &stats, &extStats); 1541 1542#if MEASURE_DEBUG 1543 // Sleep to make sure we don't lose logs 1544 usleep(1); 1545#endif 1546 } 1547 } 1548 extStats.dataSize = dataSize; 1549 ATRACE_END(); 1550 } else { 1551 ATRACE_BEGIN("obb"); 1552 auto obbPath = create_data_path(uuid_) + "/media/obb"; 1553 calculate_tree_size(obbPath, &extStats.codeSize); 1554 ATRACE_END(); 1555 1556 ATRACE_BEGIN("code"); 1557 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize); 1558 ATRACE_END(); 1559 1560 ATRACE_BEGIN("data"); 1561 auto cePath = create_data_user_ce_path(uuid_, userId); 1562 collectManualStatsForUser(cePath, &stats); 1563 auto dePath = create_data_user_de_path(uuid_, userId); 1564 collectManualStatsForUser(dePath, &stats); 1565 ATRACE_END(); 1566 1567 if (!uuid) { 1568 ATRACE_BEGIN("profile"); 1569 auto userProfilePath = create_primary_cur_profile_dir_path(userId); 1570 calculate_tree_size(userProfilePath, &stats.dataSize); 1571 auto refProfilePath = create_primary_ref_profile_dir_path(); 1572 calculate_tree_size(refProfilePath, &stats.codeSize); 1573 ATRACE_END(); 1574 } 1575 1576 ATRACE_BEGIN("external"); 1577 auto dataMediaPath = create_data_media_path(uuid_, userId); 1578 collectManualExternalStatsForUser(dataMediaPath, &extStats); 1579#if MEASURE_DEBUG 1580 LOG(DEBUG) << "Measured external data " << extStats.dataSize << " cache " 1581 << extStats.cacheSize; 1582#endif 1583 ATRACE_END(); 1584 1585 if (!uuid) { 1586 ATRACE_BEGIN("dalvik"); 1587 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize); 1588 calculate_tree_size(create_primary_cur_profile_dir_path(userId), &stats.dataSize); 1589 ATRACE_END(); 1590 } 1591 } 1592 1593 std::vector<int64_t> ret; 1594 ret.push_back(stats.codeSize); 1595 ret.push_back(stats.dataSize); 1596 ret.push_back(stats.cacheSize); 1597 ret.push_back(extStats.codeSize); 1598 ret.push_back(extStats.dataSize); 1599 ret.push_back(extStats.cacheSize); 1600#if MEASURE_DEBUG 1601 LOG(DEBUG) << "Final result " << toString(ret); 1602#endif 1603 *_aidl_return = ret; 1604 return ok(); 1605} 1606 1607binder::Status InstalldNativeService::getExternalSize(const std::unique_ptr<std::string>& uuid, 1608 int32_t userId, int32_t flags, const std::vector<int32_t>& appIds, 1609 std::vector<int64_t>* _aidl_return) { 1610 ENFORCE_UID(AID_SYSTEM); 1611 CHECK_ARGUMENT_UUID(uuid); 1612 // NOTE: Locking is relaxed on this method, since it's limited to 1613 // read-only measurements without mutation. 1614 1615 // When modifying this logic, always verify using tests: 1616 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetExternalSize 1617 1618#if MEASURE_DEBUG 1619 LOG(INFO) << "Measuring external " << userId; 1620#endif 1621 1622 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1623 1624 int64_t totalSize = 0; 1625 int64_t audioSize = 0; 1626 int64_t videoSize = 0; 1627 int64_t imageSize = 0; 1628 int64_t appSize = 0; 1629 1630 auto device = findQuotaDeviceForUuid(uuid); 1631 if (device.empty()) { 1632 flags &= ~FLAG_USE_QUOTA; 1633 } 1634 1635 if (flags & FLAG_USE_QUOTA) { 1636 struct dqblk dq; 1637 1638 ATRACE_BEGIN("quota"); 1639 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1640 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1641 reinterpret_cast<char*>(&dq)) != 0) { 1642 if (errno != ESRCH) { 1643 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1644 } 1645 } else { 1646#if MEASURE_DEBUG 1647 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1648#endif 1649 totalSize = dq.dqb_curspace; 1650 } 1651 1652 gid_t audioGid = multiuser_get_uid(userId, AID_MEDIA_AUDIO); 1653 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), audioGid, 1654 reinterpret_cast<char*>(&dq)) == 0) { 1655#if MEASURE_DEBUG 1656 LOG(DEBUG) << "quotactl() for GID " << audioGid << " " << dq.dqb_curspace; 1657#endif 1658 audioSize = dq.dqb_curspace; 1659 } 1660 gid_t videoGid = multiuser_get_uid(userId, AID_MEDIA_VIDEO); 1661 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), videoGid, 1662 reinterpret_cast<char*>(&dq)) == 0) { 1663#if MEASURE_DEBUG 1664 LOG(DEBUG) << "quotactl() for GID " << videoGid << " " << dq.dqb_curspace; 1665#endif 1666 videoSize = dq.dqb_curspace; 1667 } 1668 gid_t imageGid = multiuser_get_uid(userId, AID_MEDIA_IMAGE); 1669 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), imageGid, 1670 reinterpret_cast<char*>(&dq)) == 0) { 1671#if MEASURE_DEBUG 1672 LOG(DEBUG) << "quotactl() for GID " << imageGid << " " << dq.dqb_curspace; 1673#endif 1674 imageSize = dq.dqb_curspace; 1675 } 1676 ATRACE_END(); 1677 1678 ATRACE_BEGIN("apps"); 1679 struct stats extStats; 1680 memset(&extStats, 0, sizeof(extStats)); 1681 for (auto appId : appIds) { 1682 if (appId >= AID_APP_START) { 1683 collectQuotaStats(device, userId, appId, nullptr, &extStats); 1684 } 1685 } 1686 appSize = extStats.dataSize + extStats.cacheSize; 1687 ATRACE_END(); 1688 } else { 1689 ATRACE_BEGIN("manual"); 1690 FTS *fts; 1691 FTSENT *p; 1692 auto path = create_data_media_path(uuid_, userId); 1693 char *argv[] = { (char*) path.c_str(), nullptr }; 1694 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL))) { 1695 return error("Failed to fts_open " + path); 1696 } 1697 while ((p = fts_read(fts)) != NULL) { 1698 char* ext; 1699 int64_t size = (p->fts_statp->st_blocks * 512); 1700 switch (p->fts_info) { 1701 case FTS_F: 1702 // Only categorize files not belonging to apps 1703 if (p->fts_parent->fts_number == 0) { 1704 ext = strrchr(p->fts_name, '.'); 1705 if (ext != nullptr) { 1706 switch (MatchExtension(++ext)) { 1707 case AID_MEDIA_AUDIO: audioSize += size; break; 1708 case AID_MEDIA_VIDEO: videoSize += size; break; 1709 case AID_MEDIA_IMAGE: imageSize += size; break; 1710 } 1711 } 1712 } 1713 // Fall through to always count against total 1714 case FTS_D: 1715 // Ignore data belonging to specific apps 1716 p->fts_number = p->fts_parent->fts_number; 1717 if (p->fts_level == 1 && !strcmp(p->fts_name, "Android")) { 1718 p->fts_number = 1; 1719 } 1720 case FTS_DEFAULT: 1721 case FTS_SL: 1722 case FTS_SLNONE: 1723 if (p->fts_parent->fts_number == 1) { 1724 appSize += size; 1725 } 1726 totalSize += size; 1727 break; 1728 } 1729 } 1730 fts_close(fts); 1731 ATRACE_END(); 1732 } 1733 1734 std::vector<int64_t> ret; 1735 ret.push_back(totalSize); 1736 ret.push_back(audioSize); 1737 ret.push_back(videoSize); 1738 ret.push_back(imageSize); 1739 ret.push_back(appSize); 1740#if MEASURE_DEBUG 1741 LOG(DEBUG) << "Final result " << toString(ret); 1742#endif 1743 *_aidl_return = ret; 1744 return ok(); 1745} 1746 1747binder::Status InstalldNativeService::setAppQuota(const std::unique_ptr<std::string>& uuid, 1748 int32_t userId, int32_t appId, int64_t cacheQuota) { 1749 ENFORCE_UID(AID_SYSTEM); 1750 CHECK_ARGUMENT_UUID(uuid); 1751 std::lock_guard<std::recursive_mutex> lock(mCacheQuotasLock); 1752 1753 int32_t uid = multiuser_get_uid(userId, appId); 1754 mCacheQuotas[uid] = cacheQuota; 1755 1756 return ok(); 1757} 1758 1759// Dumps the contents of a profile file, using pkgname's dex files for pretty 1760// printing the result. 1761binder::Status InstalldNativeService::dumpProfiles(int32_t uid, const std::string& packageName, 1762 const std::string& codePaths, bool* _aidl_return) { 1763 ENFORCE_UID(AID_SYSTEM); 1764 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1765 std::lock_guard<std::recursive_mutex> lock(mLock); 1766 1767 const char* pkgname = packageName.c_str(); 1768 const char* code_paths = codePaths.c_str(); 1769 1770 *_aidl_return = dump_profiles(uid, pkgname, code_paths); 1771 return ok(); 1772} 1773 1774// TODO: Consider returning error codes. 1775binder::Status InstalldNativeService::mergeProfiles(int32_t uid, const std::string& packageName, 1776 bool* _aidl_return) { 1777 ENFORCE_UID(AID_SYSTEM); 1778 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1779 std::lock_guard<std::recursive_mutex> lock(mLock); 1780 1781 *_aidl_return = analyze_primary_profiles(uid, packageName); 1782 return ok(); 1783} 1784 1785binder::Status InstalldNativeService::dexopt(const std::string& apkPath, int32_t uid, 1786 const std::unique_ptr<std::string>& packageName, const std::string& instructionSet, 1787 int32_t dexoptNeeded, const std::unique_ptr<std::string>& outputPath, int32_t dexFlags, 1788 const std::string& compilerFilter, const std::unique_ptr<std::string>& uuid, 1789 const std::unique_ptr<std::string>& sharedLibraries, 1790 const std::unique_ptr<std::string>& seInfo) { 1791 ENFORCE_UID(AID_SYSTEM); 1792 CHECK_ARGUMENT_UUID(uuid); 1793 if (packageName && *packageName != "*") { 1794 CHECK_ARGUMENT_PACKAGE_NAME(*packageName); 1795 } 1796 std::lock_guard<std::recursive_mutex> lock(mLock); 1797 1798 const char* apk_path = apkPath.c_str(); 1799 const char* pkgname = packageName ? packageName->c_str() : "*"; 1800 const char* instruction_set = instructionSet.c_str(); 1801 const char* oat_dir = outputPath ? outputPath->c_str() : nullptr; 1802 const char* compiler_filter = compilerFilter.c_str(); 1803 const char* volume_uuid = uuid ? uuid->c_str() : nullptr; 1804 const char* shared_libraries = sharedLibraries ? sharedLibraries->c_str() : nullptr; 1805 const char* se_info = seInfo ? seInfo->c_str() : nullptr; 1806 int res = android::installd::dexopt(apk_path, uid, pkgname, instruction_set, dexoptNeeded, 1807 oat_dir, dexFlags, compiler_filter, volume_uuid, shared_libraries, se_info); 1808 return res ? error(res, "Failed to dexopt") : ok(); 1809} 1810 1811binder::Status InstalldNativeService::markBootComplete(const std::string& instructionSet) { 1812 ENFORCE_UID(AID_SYSTEM); 1813 std::lock_guard<std::recursive_mutex> lock(mLock); 1814 1815 const char* instruction_set = instructionSet.c_str(); 1816 1817 char boot_marker_path[PKG_PATH_MAX]; 1818 sprintf(boot_marker_path, 1819 "%s/%s/%s/.booting", 1820 android_data_dir.path, 1821 DALVIK_CACHE, 1822 instruction_set); 1823 1824 ALOGV("mark_boot_complete : %s", boot_marker_path); 1825 if (unlink(boot_marker_path) != 0) { 1826 return error(StringPrintf("Failed to unlink %s", boot_marker_path)); 1827 } 1828 return ok(); 1829} 1830 1831void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid, 1832 struct stat* statbuf) 1833{ 1834 while (path[basepos] != 0) { 1835 if (path[basepos] == '/') { 1836 path[basepos] = 0; 1837 if (lstat(path, statbuf) < 0) { 1838 ALOGV("Making directory: %s\n", path); 1839 if (mkdir(path, mode) == 0) { 1840 chown(path, uid, gid); 1841 } else { 1842 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno)); 1843 } 1844 } 1845 path[basepos] = '/'; 1846 basepos++; 1847 } 1848 basepos++; 1849 } 1850} 1851 1852binder::Status InstalldNativeService::linkNativeLibraryDirectory( 1853 const std::unique_ptr<std::string>& uuid, const std::string& packageName, 1854 const std::string& nativeLibPath32, int32_t userId) { 1855 ENFORCE_UID(AID_SYSTEM); 1856 CHECK_ARGUMENT_UUID(uuid); 1857 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1858 std::lock_guard<std::recursive_mutex> lock(mLock); 1859 1860 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1861 const char* pkgname = packageName.c_str(); 1862 const char* asecLibDir = nativeLibPath32.c_str(); 1863 struct stat s, libStat; 1864 binder::Status res = ok(); 1865 1866 auto _pkgdir = create_data_user_ce_package_path(uuid_, userId, pkgname); 1867 auto _libsymlink = _pkgdir + PKG_LIB_POSTFIX; 1868 1869 const char* pkgdir = _pkgdir.c_str(); 1870 const char* libsymlink = _libsymlink.c_str(); 1871 1872 if (stat(pkgdir, &s) < 0) { 1873 return error("Failed to stat " + _pkgdir); 1874 } 1875 1876 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) { 1877 return error("Failed to chown " + _pkgdir); 1878 } 1879 1880 if (chmod(pkgdir, 0700) < 0) { 1881 res = error("Failed to chmod " + _pkgdir); 1882 goto out; 1883 } 1884 1885 if (lstat(libsymlink, &libStat) < 0) { 1886 if (errno != ENOENT) { 1887 res = error("Failed to stat " + _libsymlink); 1888 goto out; 1889 } 1890 } else { 1891 if (S_ISDIR(libStat.st_mode)) { 1892 if (delete_dir_contents(libsymlink, 1, NULL) < 0) { 1893 res = error("Failed to delete " + _libsymlink); 1894 goto out; 1895 } 1896 } else if (S_ISLNK(libStat.st_mode)) { 1897 if (unlink(libsymlink) < 0) { 1898 res = error("Failed to unlink " + _libsymlink); 1899 goto out; 1900 } 1901 } 1902 } 1903 1904 if (symlink(asecLibDir, libsymlink) < 0) { 1905 res = error("Failed to symlink " + _libsymlink + " to " + nativeLibPath32); 1906 goto out; 1907 } 1908 1909out: 1910 if (chmod(pkgdir, s.st_mode) < 0) { 1911 auto msg = "Failed to cleanup chmod " + _pkgdir; 1912 if (res.isOk()) { 1913 res = error(msg); 1914 } else { 1915 PLOG(ERROR) << msg; 1916 } 1917 } 1918 1919 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) { 1920 auto msg = "Failed to cleanup chown " + _pkgdir; 1921 if (res.isOk()) { 1922 res = error(msg); 1923 } else { 1924 PLOG(ERROR) << msg; 1925 } 1926 } 1927 1928 return res; 1929} 1930 1931static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd) 1932{ 1933 static const char *IDMAP_BIN = "/system/bin/idmap"; 1934 static const size_t MAX_INT_LEN = 32; 1935 char idmap_str[MAX_INT_LEN]; 1936 1937 snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd); 1938 1939 execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL); 1940 ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno)); 1941} 1942 1943// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix) 1944// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap 1945static int flatten_path(const char *prefix, const char *suffix, 1946 const char *overlay_path, char *idmap_path, size_t N) 1947{ 1948 if (overlay_path == NULL || idmap_path == NULL) { 1949 return -1; 1950 } 1951 const size_t len_overlay_path = strlen(overlay_path); 1952 // will access overlay_path + 1 further below; requires absolute path 1953 if (len_overlay_path < 2 || *overlay_path != '/') { 1954 return -1; 1955 } 1956 const size_t len_idmap_root = strlen(prefix); 1957 const size_t len_suffix = strlen(suffix); 1958 if (SIZE_MAX - len_idmap_root < len_overlay_path || 1959 SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) { 1960 // additions below would cause overflow 1961 return -1; 1962 } 1963 if (N < len_idmap_root + len_overlay_path + len_suffix) { 1964 return -1; 1965 } 1966 memset(idmap_path, 0, N); 1967 snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix); 1968 char *ch = idmap_path + len_idmap_root; 1969 while (*ch != '\0') { 1970 if (*ch == '/') { 1971 *ch = '@'; 1972 } 1973 ++ch; 1974 } 1975 return 0; 1976} 1977 1978binder::Status InstalldNativeService::idmap(const std::string& targetApkPath, 1979 const std::string& overlayApkPath, int32_t uid) { 1980 ENFORCE_UID(AID_SYSTEM); 1981 std::lock_guard<std::recursive_mutex> lock(mLock); 1982 1983 const char* target_apk = targetApkPath.c_str(); 1984 const char* overlay_apk = overlayApkPath.c_str(); 1985 ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid); 1986 1987 int idmap_fd = -1; 1988 char idmap_path[PATH_MAX]; 1989 struct stat target_apk_stat, overlay_apk_stat, idmap_stat; 1990 bool outdated = false; 1991 1992 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1993 idmap_path, sizeof(idmap_path)) == -1) { 1994 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1995 goto fail; 1996 } 1997 1998 if (stat(idmap_path, &idmap_stat) < 0 || 1999 stat(target_apk, &target_apk_stat) < 0 || 2000 stat(overlay_apk, &overlay_apk_stat) < 0) { 2001 outdated = true; 2002 } else if (idmap_stat.st_mtime < target_apk_stat.st_mtime || 2003 idmap_stat.st_mtime < overlay_apk_stat.st_mtime) { 2004 outdated = true; 2005 } 2006 2007 if (outdated) { 2008 unlink(idmap_path); 2009 idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644); 2010 } else { 2011 idmap_fd = open(idmap_path, O_RDWR); 2012 } 2013 2014 if (idmap_fd < 0) { 2015 ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno)); 2016 goto fail; 2017 } 2018 if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) { 2019 ALOGE("idmap cannot chown '%s'\n", idmap_path); 2020 goto fail; 2021 } 2022 if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { 2023 ALOGE("idmap cannot chmod '%s'\n", idmap_path); 2024 goto fail; 2025 } 2026 2027 if (!outdated) { 2028 close(idmap_fd); 2029 return ok(); 2030 } 2031 2032 pid_t pid; 2033 pid = fork(); 2034 if (pid == 0) { 2035 /* child -- drop privileges before continuing */ 2036 if (setgid(uid) != 0) { 2037 ALOGE("setgid(%d) failed during idmap\n", uid); 2038 exit(1); 2039 } 2040 if (setuid(uid) != 0) { 2041 ALOGE("setuid(%d) failed during idmap\n", uid); 2042 exit(1); 2043 } 2044 if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) { 2045 ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno)); 2046 exit(1); 2047 } 2048 2049 run_idmap(target_apk, overlay_apk, idmap_fd); 2050 exit(1); /* only if exec call to idmap failed */ 2051 } else { 2052 int status = wait_child(pid); 2053 if (status != 0) { 2054 ALOGE("idmap failed, status=0x%04x\n", status); 2055 goto fail; 2056 } 2057 } 2058 2059 close(idmap_fd); 2060 return ok(); 2061fail: 2062 if (idmap_fd >= 0) { 2063 close(idmap_fd); 2064 unlink(idmap_path); 2065 } 2066 return error(); 2067} 2068 2069binder::Status InstalldNativeService::removeIdmap(const std::string& overlayApkPath) { 2070 const char* overlay_apk = overlayApkPath.c_str(); 2071 char idmap_path[PATH_MAX]; 2072 2073 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 2074 idmap_path, sizeof(idmap_path)) == -1) { 2075 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 2076 return error(); 2077 } 2078 if (unlink(idmap_path) < 0) { 2079 ALOGE("couldn't unlink idmap file %s\n", idmap_path); 2080 return error(); 2081 } 2082 return ok(); 2083} 2084 2085binder::Status InstalldNativeService::restoreconAppData(const std::unique_ptr<std::string>& uuid, 2086 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 2087 const std::string& seInfo) { 2088 ENFORCE_UID(AID_SYSTEM); 2089 CHECK_ARGUMENT_UUID(uuid); 2090 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 2091 std::lock_guard<std::recursive_mutex> lock(mLock); 2092 2093 binder::Status res = ok(); 2094 2095 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here. 2096 unsigned int seflags = SELINUX_ANDROID_RESTORECON_RECURSE; 2097 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 2098 const char* pkgName = packageName.c_str(); 2099 const char* seinfo = seInfo.c_str(); 2100 2101 uid_t uid = multiuser_get_uid(userId, appId); 2102 if (flags & FLAG_STORAGE_CE) { 2103 auto path = create_data_user_ce_package_path(uuid_, userId, pkgName); 2104 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 2105 res = error("restorecon failed for " + path); 2106 } 2107 } 2108 if (flags & FLAG_STORAGE_DE) { 2109 auto path = create_data_user_de_package_path(uuid_, userId, pkgName); 2110 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 2111 res = error("restorecon failed for " + path); 2112 } 2113 } 2114 return res; 2115} 2116 2117binder::Status InstalldNativeService::createOatDir(const std::string& oatDir, 2118 const std::string& instructionSet) { 2119 ENFORCE_UID(AID_SYSTEM); 2120 std::lock_guard<std::recursive_mutex> lock(mLock); 2121 2122 const char* oat_dir = oatDir.c_str(); 2123 const char* instruction_set = instructionSet.c_str(); 2124 char oat_instr_dir[PKG_PATH_MAX]; 2125 2126 if (validate_apk_path(oat_dir)) { 2127 return error("Invalid path " + oatDir); 2128 } 2129 if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 2130 return error("Failed to prepare " + oatDir); 2131 } 2132 if (selinux_android_restorecon(oat_dir, 0)) { 2133 return error("Failed to restorecon " + oatDir); 2134 } 2135 snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set); 2136 if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 2137 return error(StringPrintf("Failed to prepare %s", oat_instr_dir)); 2138 } 2139 return ok(); 2140} 2141 2142binder::Status InstalldNativeService::rmPackageDir(const std::string& packageDir) { 2143 ENFORCE_UID(AID_SYSTEM); 2144 std::lock_guard<std::recursive_mutex> lock(mLock); 2145 2146 if (validate_apk_path(packageDir.c_str())) { 2147 return error("Invalid path " + packageDir); 2148 } 2149 if (delete_dir_contents_and_dir(packageDir) != 0) { 2150 return error("Failed to delete " + packageDir); 2151 } 2152 return ok(); 2153} 2154 2155binder::Status InstalldNativeService::linkFile(const std::string& relativePath, 2156 const std::string& fromBase, const std::string& toBase) { 2157 ENFORCE_UID(AID_SYSTEM); 2158 std::lock_guard<std::recursive_mutex> lock(mLock); 2159 2160 const char* relative_path = relativePath.c_str(); 2161 const char* from_base = fromBase.c_str(); 2162 const char* to_base = toBase.c_str(); 2163 char from_path[PKG_PATH_MAX]; 2164 char to_path[PKG_PATH_MAX]; 2165 snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path); 2166 snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path); 2167 2168 if (validate_apk_path_subdirs(from_path)) { 2169 return error(StringPrintf("Invalid from path %s", from_path)); 2170 } 2171 2172 if (validate_apk_path_subdirs(to_path)) { 2173 return error(StringPrintf("Invalid to path %s", to_path)); 2174 } 2175 2176 if (link(from_path, to_path) < 0) { 2177 return error(StringPrintf("Failed to link from %s to %s", from_path, to_path)); 2178 } 2179 2180 return ok(); 2181} 2182 2183binder::Status InstalldNativeService::moveAb(const std::string& apkPath, 2184 const std::string& instructionSet, const std::string& outputPath) { 2185 ENFORCE_UID(AID_SYSTEM); 2186 std::lock_guard<std::recursive_mutex> lock(mLock); 2187 2188 const char* apk_path = apkPath.c_str(); 2189 const char* instruction_set = instructionSet.c_str(); 2190 const char* oat_dir = outputPath.c_str(); 2191 2192 bool success = move_ab(apk_path, instruction_set, oat_dir); 2193 return success ? ok() : error(); 2194} 2195 2196binder::Status InstalldNativeService::deleteOdex(const std::string& apkPath, 2197 const std::string& instructionSet, const std::string& outputPath) { 2198 ENFORCE_UID(AID_SYSTEM); 2199 std::lock_guard<std::recursive_mutex> lock(mLock); 2200 2201 const char* apk_path = apkPath.c_str(); 2202 const char* instruction_set = instructionSet.c_str(); 2203 const char* oat_dir = outputPath.c_str(); 2204 2205 bool res = delete_odex(apk_path, instruction_set, oat_dir); 2206 return res ? ok() : error(); 2207} 2208 2209binder::Status InstalldNativeService::reconcileSecondaryDexFile( 2210 const std::string& dexPath, const std::string& packageName, int32_t uid, 2211 const std::vector<std::string>& isas, const std::unique_ptr<std::string>& volumeUuid, 2212 int32_t storage_flag, bool* _aidl_return) { 2213 ENFORCE_UID(AID_SYSTEM); 2214 CHECK_ARGUMENT_UUID(volumeUuid); 2215 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 2216 2217 std::lock_guard<std::recursive_mutex> lock(mLock); 2218 bool result = android::installd::reconcile_secondary_dex_file( 2219 dexPath, packageName, uid, isas, volumeUuid, storage_flag, _aidl_return); 2220 return result ? ok() : error(); 2221} 2222 2223binder::Status InstalldNativeService::invalidateMounts() { 2224 ENFORCE_UID(AID_SYSTEM); 2225 std::lock_guard<std::recursive_mutex> lock(mQuotaDevicesLock); 2226 2227 mQuotaDevices.clear(); 2228 2229 std::ifstream in("/proc/mounts"); 2230 if (!in.is_open()) { 2231 return error("Failed to read mounts"); 2232 } 2233 2234 std::string source; 2235 std::string target; 2236 std::string ignored; 2237 struct dqblk dq; 2238 while (!in.eof()) { 2239 std::getline(in, source, ' '); 2240 std::getline(in, target, ' '); 2241 std::getline(in, ignored); 2242 2243 if (source.compare(0, 11, "/dev/block/") == 0) { 2244 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), source.c_str(), 0, 2245 reinterpret_cast<char*>(&dq)) == 0) { 2246 LOG(DEBUG) << "Found " << source << " with quota"; 2247 mQuotaDevices[target] = source; 2248 2249 // ext4 only enables DQUOT_USAGE_ENABLED by default, so we 2250 // need to kick it again to enable DQUOT_LIMITS_ENABLED. 2251 if (quotactl(QCMD(Q_QUOTAON, USRQUOTA), source.c_str(), QFMT_VFS_V1, nullptr) != 0 2252 && errno != EBUSY) { 2253 PLOG(ERROR) << "Failed to enable USRQUOTA on " << source; 2254 } 2255 if (quotactl(QCMD(Q_QUOTAON, GRPQUOTA), source.c_str(), QFMT_VFS_V1, nullptr) != 0 2256 && errno != EBUSY) { 2257 PLOG(ERROR) << "Failed to enable GRPQUOTA on " << source; 2258 } 2259 } 2260 } 2261 } 2262 return ok(); 2263} 2264 2265std::string InstalldNativeService::findQuotaDeviceForUuid( 2266 const std::unique_ptr<std::string>& uuid) { 2267 std::lock_guard<std::recursive_mutex> lock(mQuotaDevicesLock); 2268 auto path = create_data_path(uuid ? uuid->c_str() : nullptr); 2269 return mQuotaDevices[path]; 2270} 2271 2272binder::Status InstalldNativeService::isQuotaSupported( 2273 const std::unique_ptr<std::string>& volumeUuid, bool* _aidl_return) { 2274 *_aidl_return = !findQuotaDeviceForUuid(volumeUuid).empty(); 2275 return ok(); 2276} 2277 2278} // namespace installd 2279} // namespace android 2280