InstalldNativeService.cpp revision e59c85cc0e78bfcc8fec6acc8e37e6a472ffc07f
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; 91 92namespace { 93 94constexpr const char* kDump = "android.permission.DUMP"; 95 96static binder::Status ok() { 97 return binder::Status::ok(); 98} 99 100static binder::Status exception(uint32_t code, const std::string& msg) { 101 return binder::Status::fromExceptionCode(code, String8(msg.c_str())); 102} 103 104static binder::Status error() { 105 return binder::Status::fromServiceSpecificError(errno); 106} 107 108static binder::Status error(const std::string& msg) { 109 PLOG(ERROR) << msg; 110 return binder::Status::fromServiceSpecificError(errno, String8(msg.c_str())); 111} 112 113static binder::Status error(uint32_t code, const std::string& msg) { 114 LOG(ERROR) << msg << " (" << code << ")"; 115 return binder::Status::fromServiceSpecificError(code, String8(msg.c_str())); 116} 117 118binder::Status checkPermission(const char* permission) { 119 pid_t pid; 120 uid_t uid; 121 122 if (checkCallingPermission(String16(permission), reinterpret_cast<int32_t*>(&pid), 123 reinterpret_cast<int32_t*>(&uid))) { 124 return ok(); 125 } else { 126 return exception(binder::Status::EX_SECURITY, 127 StringPrintf("UID %d / PID %d lacks permission %s", uid, pid, permission)); 128 } 129} 130 131binder::Status checkUid(uid_t expectedUid) { 132 uid_t uid = IPCThreadState::self()->getCallingUid(); 133 if (uid == expectedUid || uid == AID_ROOT) { 134 return ok(); 135 } else { 136 return exception(binder::Status::EX_SECURITY, 137 StringPrintf("UID %d is not expected UID %d", uid, expectedUid)); 138 } 139} 140 141binder::Status checkArgumentUuid(const std::unique_ptr<std::string>& uuid) { 142 if (!uuid || is_valid_filename(*uuid)) { 143 return ok(); 144 } else { 145 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 146 StringPrintf("UUID %s is malformed", uuid->c_str())); 147 } 148} 149 150binder::Status checkArgumentPackageName(const std::string& packageName) { 151 if (is_valid_package_name(packageName.c_str())) { 152 return ok(); 153 } else { 154 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 155 StringPrintf("Package name %s is malformed", packageName.c_str())); 156 } 157} 158 159#define ENFORCE_UID(uid) { \ 160 binder::Status status = checkUid((uid)); \ 161 if (!status.isOk()) { \ 162 return status; \ 163 } \ 164} 165 166#define CHECK_ARGUMENT_UUID(uuid) { \ 167 binder::Status status = checkArgumentUuid((uuid)); \ 168 if (!status.isOk()) { \ 169 return status; \ 170 } \ 171} 172 173#define CHECK_ARGUMENT_PACKAGE_NAME(packageName) { \ 174 binder::Status status = \ 175 checkArgumentPackageName((packageName)); \ 176 if (!status.isOk()) { \ 177 return status; \ 178 } \ 179} 180 181} // namespace 182 183status_t InstalldNativeService::start() { 184 IPCThreadState::self()->disableBackgroundScheduling(true); 185 status_t ret = BinderService<InstalldNativeService>::publish(); 186 if (ret != android::OK) { 187 return ret; 188 } 189 sp<ProcessState> ps(ProcessState::self()); 190 ps->startThreadPool(); 191 ps->giveThreadPoolName(); 192 return android::OK; 193} 194 195status_t InstalldNativeService::dump(int fd, const Vector<String16> & /* args */) { 196 auto out = std::fstream(StringPrintf("/proc/self/fd/%d", fd)); 197 const binder::Status dump_permission = checkPermission(kDump); 198 if (!dump_permission.isOk()) { 199 out << dump_permission.toString8() << endl; 200 return PERMISSION_DENIED; 201 } 202 std::lock_guard<std::recursive_mutex> lock(mLock); 203 204 out << "installd is happy!" << endl; 205 206 { 207 std::lock_guard<std::recursive_mutex> lock(mQuotaDevicesLock); 208 out << endl << "Devices with quota support:" << endl; 209 for (const auto& n : mQuotaDevices) { 210 out << " " << n.first << " = " << n.second << endl; 211 } 212 } 213 214 { 215 std::lock_guard<std::recursive_mutex> lock(mCacheQuotasLock); 216 out << endl << "Per-UID cache quotas:" << endl; 217 for (const auto& n : mCacheQuotas) { 218 out << " " << n.first << " = " << n.second << endl; 219 } 220 } 221 222 out << endl; 223 out.flush(); 224 225 return NO_ERROR; 226} 227 228/** 229 * Perform restorecon of the given path, but only perform recursive restorecon 230 * if the label of that top-level file actually changed. This can save us 231 * significant time by avoiding no-op traversals of large filesystem trees. 232 */ 233static int restorecon_app_data_lazy(const std::string& path, const std::string& seInfo, uid_t uid, 234 bool existing) { 235 int res = 0; 236 char* before = nullptr; 237 char* after = nullptr; 238 239 // Note that SELINUX_ANDROID_RESTORECON_DATADATA flag is set by 240 // libselinux. Not needed here. 241 242 if (lgetfilecon(path.c_str(), &before) < 0) { 243 PLOG(ERROR) << "Failed before getfilecon for " << path; 244 goto fail; 245 } 246 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 0) < 0) { 247 PLOG(ERROR) << "Failed top-level restorecon for " << path; 248 goto fail; 249 } 250 if (lgetfilecon(path.c_str(), &after) < 0) { 251 PLOG(ERROR) << "Failed after getfilecon for " << path; 252 goto fail; 253 } 254 255 // If the initial top-level restorecon above changed the label, then go 256 // back and restorecon everything recursively 257 if (strcmp(before, after)) { 258 if (existing) { 259 LOG(DEBUG) << "Detected label change from " << before << " to " << after << " at " 260 << path << "; running recursive restorecon"; 261 } 262 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 263 SELINUX_ANDROID_RESTORECON_RECURSE) < 0) { 264 PLOG(ERROR) << "Failed recursive restorecon for " << path; 265 goto fail; 266 } 267 } 268 269 goto done; 270fail: 271 res = -1; 272done: 273 free(before); 274 free(after); 275 return res; 276} 277 278static int restorecon_app_data_lazy(const std::string& parent, const char* name, 279 const std::string& seInfo, uid_t uid, bool existing) { 280 return restorecon_app_data_lazy(StringPrintf("%s/%s", parent.c_str(), name), seInfo, uid, 281 existing); 282} 283 284static int prepare_app_dir(const std::string& path, mode_t target_mode, uid_t uid) { 285 if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, uid) != 0) { 286 PLOG(ERROR) << "Failed to prepare " << path; 287 return -1; 288 } 289 return 0; 290} 291 292/** 293 * Ensure that we have a hard-limit quota to protect against abusive apps; 294 * they should never use more than 90% of blocks or 50% of inodes. 295 */ 296static int prepare_app_quota(const std::unique_ptr<std::string>& uuid, const std::string& device, 297 uid_t uid) { 298 if (device.empty()) return 0; 299 300 struct dqblk dq; 301 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 302 reinterpret_cast<char*>(&dq)) != 0) { 303 PLOG(WARNING) << "Failed to find quota for " << uid; 304 return -1; 305 } 306 307 if ((dq.dqb_bhardlimit == 0) || (dq.dqb_ihardlimit == 0)) { 308 auto path = create_data_path(uuid ? uuid->c_str() : nullptr); 309 struct statvfs stat; 310 if (statvfs(path.c_str(), &stat) != 0) { 311 PLOG(WARNING) << "Failed to statvfs " << path; 312 return -1; 313 } 314 315 dq.dqb_valid = QIF_LIMITS; 316 dq.dqb_bhardlimit = (((stat.f_blocks * stat.f_frsize) / 10) * 9) / QIF_DQBLKSIZE; 317 dq.dqb_ihardlimit = (stat.f_files / 2); 318 if (quotactl(QCMD(Q_SETQUOTA, USRQUOTA), device.c_str(), uid, 319 reinterpret_cast<char*>(&dq)) != 0) { 320 PLOG(WARNING) << "Failed to set hard quota for " << uid; 321 return -1; 322 } else { 323 LOG(DEBUG) << "Applied hard quotas for " << uid; 324 return 0; 325 } 326 } else { 327 // Hard quota already set; assume it's reasonable 328 return 0; 329 } 330} 331 332binder::Status InstalldNativeService::createAppData(const std::unique_ptr<std::string>& uuid, 333 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 334 const std::string& seInfo, int32_t targetSdkVersion, int64_t* _aidl_return) { 335 ENFORCE_UID(AID_SYSTEM); 336 CHECK_ARGUMENT_UUID(uuid); 337 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 338 std::lock_guard<std::recursive_mutex> lock(mLock); 339 340 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 341 const char* pkgname = packageName.c_str(); 342 343 // Assume invalid inode unless filled in below 344 if (_aidl_return != nullptr) *_aidl_return = -1; 345 346 int32_t uid = multiuser_get_uid(userId, appId); 347 int32_t cacheGid = multiuser_get_cache_gid(userId, appId); 348 mode_t targetMode = targetSdkVersion >= MIN_RESTRICTED_HOME_SDK_VERSION ? 0700 : 0751; 349 350 // If UID doesn't have a specific cache GID, use UID value 351 if (cacheGid == -1) { 352 cacheGid = uid; 353 } 354 355 if (flags & FLAG_STORAGE_CE) { 356 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname); 357 bool existing = (access(path.c_str(), F_OK) == 0); 358 359 if (prepare_app_dir(path, targetMode, uid) || 360 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 361 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 362 return error("Failed to prepare " + path); 363 } 364 365 // Consider restorecon over contents if label changed 366 if (restorecon_app_data_lazy(path, seInfo, uid, existing) || 367 restorecon_app_data_lazy(path, "cache", seInfo, uid, existing) || 368 restorecon_app_data_lazy(path, "code_cache", seInfo, uid, existing)) { 369 return error("Failed to restorecon " + path); 370 } 371 372 // Remember inode numbers of cache directories so that we can clear 373 // contents while CE storage is locked 374 if (write_path_inode(path, "cache", kXattrInodeCache) || 375 write_path_inode(path, "code_cache", kXattrInodeCodeCache)) { 376 return error("Failed to write_path_inode for " + path); 377 } 378 379 // And return the CE inode of the top-level data directory so we can 380 // clear contents while CE storage is locked 381 if ((_aidl_return != nullptr) 382 && get_path_inode(path, reinterpret_cast<ino_t*>(_aidl_return)) != 0) { 383 return error("Failed to get_path_inode for " + path); 384 } 385 } 386 if (flags & FLAG_STORAGE_DE) { 387 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 388 bool existing = (access(path.c_str(), F_OK) == 0); 389 390 if (prepare_app_dir(path, targetMode, uid) || 391 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 392 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 393 return error("Failed to prepare " + path); 394 } 395 396 // Consider restorecon over contents if label changed 397 if (restorecon_app_data_lazy(path, seInfo, uid, existing)) { 398 return error("Failed to restorecon " + path); 399 } 400 401 if (prepare_app_quota(uuid, findQuotaDeviceForUuid(uuid), uid)) { 402 return error("Failed to set hard quota " + path); 403 } 404 405 if (property_get_bool("dalvik.vm.usejitprofiles", false)) { 406 const std::string profile_dir = 407 create_primary_current_profile_package_dir_path(userId, pkgname); 408 // read-write-execute only for the app user. 409 if (fs_prepare_dir_strict(profile_dir.c_str(), 0700, uid, uid) != 0) { 410 return error("Failed to prepare " + profile_dir); 411 } 412 const std::string profile_file = create_current_profile_path(userId, pkgname, 413 /*is_secondary_dex*/false); 414 // read-write only for the app user. 415 if (fs_prepare_file_strict(profile_file.c_str(), 0600, uid, uid) != 0) { 416 return error("Failed to prepare " + profile_file); 417 } 418 const std::string ref_profile_path = 419 create_primary_reference_profile_package_dir_path(pkgname); 420 // dex2oat/profman runs under the shared app gid and it needs to read/write reference 421 // profiles. 422 int shared_app_gid = multiuser_get_shared_gid(0, appId); 423 if ((shared_app_gid != -1) && fs_prepare_dir_strict( 424 ref_profile_path.c_str(), 0700, shared_app_gid, shared_app_gid) != 0) { 425 return error("Failed to prepare " + ref_profile_path); 426 } 427 } 428 } 429 return ok(); 430} 431 432binder::Status InstalldNativeService::migrateAppData(const std::unique_ptr<std::string>& uuid, 433 const std::string& packageName, int32_t userId, int32_t flags) { 434 ENFORCE_UID(AID_SYSTEM); 435 CHECK_ARGUMENT_UUID(uuid); 436 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 437 std::lock_guard<std::recursive_mutex> lock(mLock); 438 439 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 440 const char* pkgname = packageName.c_str(); 441 442 // This method only exists to upgrade system apps that have requested 443 // forceDeviceEncrypted, so their default storage always lives in a 444 // consistent location. This only works on non-FBE devices, since we 445 // never want to risk exposing data on a device with real CE/DE storage. 446 447 auto ce_path = create_data_user_ce_package_path(uuid_, userId, pkgname); 448 auto de_path = create_data_user_de_package_path(uuid_, userId, pkgname); 449 450 // If neither directory is marked as default, assume CE is default 451 if (getxattr(ce_path.c_str(), kXattrDefault, nullptr, 0) == -1 452 && getxattr(de_path.c_str(), kXattrDefault, nullptr, 0) == -1) { 453 if (setxattr(ce_path.c_str(), kXattrDefault, nullptr, 0, 0) != 0) { 454 return error("Failed to mark default storage " + ce_path); 455 } 456 } 457 458 // Migrate default data location if needed 459 auto target = (flags & FLAG_STORAGE_DE) ? de_path : ce_path; 460 auto source = (flags & FLAG_STORAGE_DE) ? ce_path : de_path; 461 462 if (getxattr(target.c_str(), kXattrDefault, nullptr, 0) == -1) { 463 LOG(WARNING) << "Requested default storage " << target 464 << " is not active; migrating from " << source; 465 if (delete_dir_contents_and_dir(target) != 0) { 466 return error("Failed to delete " + target); 467 } 468 if (rename(source.c_str(), target.c_str()) != 0) { 469 return error("Failed to rename " + source + " to " + target); 470 } 471 } 472 473 return ok(); 474} 475 476 477binder::Status InstalldNativeService::clearAppProfiles(const std::string& packageName) { 478 ENFORCE_UID(AID_SYSTEM); 479 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 480 std::lock_guard<std::recursive_mutex> lock(mLock); 481 482 binder::Status res = ok(); 483 if (!clear_primary_reference_profile(packageName)) { 484 res = error("Failed to clear reference profile for " + packageName); 485 } 486 if (!clear_primary_current_profiles(packageName)) { 487 res = error("Failed to clear current profiles for " + packageName); 488 } 489 return res; 490} 491 492binder::Status InstalldNativeService::clearAppData(const std::unique_ptr<std::string>& uuid, 493 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 494 ENFORCE_UID(AID_SYSTEM); 495 CHECK_ARGUMENT_UUID(uuid); 496 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 497 std::lock_guard<std::recursive_mutex> lock(mLock); 498 499 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 500 const char* pkgname = packageName.c_str(); 501 502 binder::Status res = ok(); 503 if (flags & FLAG_STORAGE_CE) { 504 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 505 if (flags & FLAG_CLEAR_CACHE_ONLY) { 506 path = read_path_inode(path, "cache", kXattrInodeCache); 507 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 508 path = read_path_inode(path, "code_cache", kXattrInodeCodeCache); 509 } 510 if (access(path.c_str(), F_OK) == 0) { 511 if (delete_dir_contents(path) != 0) { 512 res = error("Failed to delete contents of " + path); 513 } 514 } 515 } 516 if (flags & FLAG_STORAGE_DE) { 517 std::string suffix = ""; 518 bool only_cache = false; 519 if (flags & FLAG_CLEAR_CACHE_ONLY) { 520 suffix = CACHE_DIR_POSTFIX; 521 only_cache = true; 522 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 523 suffix = CODE_CACHE_DIR_POSTFIX; 524 only_cache = true; 525 } 526 527 auto path = create_data_user_de_package_path(uuid_, userId, pkgname) + suffix; 528 if (access(path.c_str(), F_OK) == 0) { 529 if (delete_dir_contents(path) != 0) { 530 res = error("Failed to delete contents of " + path); 531 } 532 } 533 if (!only_cache) { 534 if (!clear_primary_current_profile(packageName, userId)) { 535 res = error("Failed to clear current profile for " + packageName); 536 } 537 } 538 } 539 return res; 540} 541 542static int destroy_app_reference_profile(const std::string& pkgname) { 543 return delete_dir_contents_and_dir( 544 create_primary_reference_profile_package_dir_path(pkgname), 545 /*ignore_if_missing*/ true); 546} 547 548static int destroy_app_current_profiles(const std::string& pkgname, userid_t userid) { 549 return delete_dir_contents_and_dir( 550 create_primary_current_profile_package_dir_path(userid, pkgname), 551 /*ignore_if_missing*/ true); 552} 553 554binder::Status InstalldNativeService::destroyAppProfiles(const std::string& packageName) { 555 ENFORCE_UID(AID_SYSTEM); 556 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 557 std::lock_guard<std::recursive_mutex> lock(mLock); 558 559 binder::Status res = ok(); 560 std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr); 561 for (auto user : users) { 562 if (destroy_app_current_profiles(packageName, user) != 0) { 563 res = error("Failed to destroy current profiles for " + packageName); 564 } 565 } 566 if (destroy_app_reference_profile(packageName) != 0) { 567 res = error("Failed to destroy reference profile for " + packageName); 568 } 569 return res; 570} 571 572binder::Status InstalldNativeService::destroyAppData(const std::unique_ptr<std::string>& uuid, 573 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 574 ENFORCE_UID(AID_SYSTEM); 575 CHECK_ARGUMENT_UUID(uuid); 576 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 577 std::lock_guard<std::recursive_mutex> lock(mLock); 578 579 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 580 const char* pkgname = packageName.c_str(); 581 582 binder::Status res = ok(); 583 if (flags & FLAG_STORAGE_CE) { 584 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 585 if (delete_dir_contents_and_dir(path) != 0) { 586 res = error("Failed to delete " + path); 587 } 588 } 589 if (flags & FLAG_STORAGE_DE) { 590 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 591 if (delete_dir_contents_and_dir(path) != 0) { 592 res = error("Failed to delete " + path); 593 } 594 destroy_app_current_profiles(packageName, userId); 595 // TODO(calin): If the package is still installed by other users it's probably 596 // beneficial to keep the reference profile around. 597 // Verify if it's ok to do that. 598 destroy_app_reference_profile(packageName); 599 } 600 return res; 601} 602 603binder::Status InstalldNativeService::moveCompleteApp(const std::unique_ptr<std::string>& fromUuid, 604 const std::unique_ptr<std::string>& toUuid, const std::string& packageName, 605 const std::string& dataAppName, int32_t appId, const std::string& seInfo, 606 int32_t targetSdkVersion) { 607 ENFORCE_UID(AID_SYSTEM); 608 CHECK_ARGUMENT_UUID(fromUuid); 609 CHECK_ARGUMENT_UUID(toUuid); 610 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 611 std::lock_guard<std::recursive_mutex> lock(mLock); 612 613 const char* from_uuid = fromUuid ? fromUuid->c_str() : nullptr; 614 const char* to_uuid = toUuid ? toUuid->c_str() : nullptr; 615 const char* package_name = packageName.c_str(); 616 const char* data_app_name = dataAppName.c_str(); 617 618 binder::Status res = ok(); 619 std::vector<userid_t> users = get_known_users(from_uuid); 620 621 // Copy app 622 { 623 auto from = create_data_app_package_path(from_uuid, data_app_name); 624 auto to = create_data_app_package_path(to_uuid, data_app_name); 625 auto to_parent = create_data_app_path(to_uuid); 626 627 char *argv[] = { 628 (char*) kCpPath, 629 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 630 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 631 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 632 (char*) "-P", /* Do not follow symlinks [default] */ 633 (char*) "-d", /* don't dereference symlinks */ 634 (char*) from.c_str(), 635 (char*) to_parent.c_str() 636 }; 637 638 LOG(DEBUG) << "Copying " << from << " to " << to; 639 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 640 if (rc != 0) { 641 res = error(rc, "Failed copying " + from + " to " + to); 642 goto fail; 643 } 644 645 if (selinux_android_restorecon(to.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) { 646 res = error("Failed to restorecon " + to); 647 goto fail; 648 } 649 } 650 651 // Copy private data for all known users 652 for (auto user : users) { 653 654 // Data source may not exist for all users; that's okay 655 auto from_ce = create_data_user_ce_package_path(from_uuid, user, package_name); 656 if (access(from_ce.c_str(), F_OK) != 0) { 657 LOG(INFO) << "Missing source " << from_ce; 658 continue; 659 } 660 661 if (!createAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, appId, 662 seInfo, targetSdkVersion, nullptr).isOk()) { 663 res = error("Failed to create package target"); 664 goto fail; 665 } 666 667 char *argv[] = { 668 (char*) kCpPath, 669 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 670 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 671 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 672 (char*) "-P", /* Do not follow symlinks [default] */ 673 (char*) "-d", /* don't dereference symlinks */ 674 nullptr, 675 nullptr 676 }; 677 678 { 679 auto from = create_data_user_de_package_path(from_uuid, user, package_name); 680 auto to = create_data_user_de_path(to_uuid, user); 681 argv[6] = (char*) from.c_str(); 682 argv[7] = (char*) to.c_str(); 683 684 LOG(DEBUG) << "Copying " << from << " to " << to; 685 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 686 if (rc != 0) { 687 res = error(rc, "Failed copying " + from + " to " + to); 688 goto fail; 689 } 690 } 691 { 692 auto from = create_data_user_ce_package_path(from_uuid, user, package_name); 693 auto to = create_data_user_ce_path(to_uuid, user); 694 argv[6] = (char*) from.c_str(); 695 argv[7] = (char*) to.c_str(); 696 697 LOG(DEBUG) << "Copying " << from << " to " << to; 698 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 699 if (rc != 0) { 700 res = error(rc, "Failed copying " + from + " to " + to); 701 goto fail; 702 } 703 } 704 705 if (!restoreconAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, 706 appId, seInfo).isOk()) { 707 res = error("Failed to restorecon"); 708 goto fail; 709 } 710 } 711 712 // We let the framework scan the new location and persist that before 713 // deleting the data in the old location; this ordering ensures that 714 // we can recover from things like battery pulls. 715 return ok(); 716 717fail: 718 // Nuke everything we might have already copied 719 { 720 auto to = create_data_app_package_path(to_uuid, data_app_name); 721 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 722 LOG(WARNING) << "Failed to rollback " << to; 723 } 724 } 725 for (auto user : users) { 726 { 727 auto to = create_data_user_de_package_path(to_uuid, user, package_name); 728 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 729 LOG(WARNING) << "Failed to rollback " << to; 730 } 731 } 732 { 733 auto to = create_data_user_ce_package_path(to_uuid, user, package_name); 734 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 735 LOG(WARNING) << "Failed to rollback " << to; 736 } 737 } 738 } 739 return res; 740} 741 742binder::Status InstalldNativeService::createUserData(const std::unique_ptr<std::string>& uuid, 743 int32_t userId, int32_t userSerial ATTRIBUTE_UNUSED, int32_t flags) { 744 ENFORCE_UID(AID_SYSTEM); 745 CHECK_ARGUMENT_UUID(uuid); 746 std::lock_guard<std::recursive_mutex> lock(mLock); 747 748 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 749 if (flags & FLAG_STORAGE_DE) { 750 if (uuid_ == nullptr) { 751 if (ensure_config_user_dirs(userId) != 0) { 752 return error(StringPrintf("Failed to ensure dirs for %d", userId)); 753 } 754 } 755 } 756 757 // Data under /data/media doesn't have an app, but we still want 758 // to limit it to prevent abuse. 759 if (prepare_app_quota(uuid, findQuotaDeviceForUuid(uuid), 760 multiuser_get_uid(userId, AID_MEDIA_RW))) { 761 return error("Failed to set hard quota for media_rw"); 762 } 763 764 return ok(); 765} 766 767binder::Status InstalldNativeService::destroyUserData(const std::unique_ptr<std::string>& uuid, 768 int32_t userId, int32_t flags) { 769 ENFORCE_UID(AID_SYSTEM); 770 CHECK_ARGUMENT_UUID(uuid); 771 std::lock_guard<std::recursive_mutex> lock(mLock); 772 773 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 774 binder::Status res = ok(); 775 if (flags & FLAG_STORAGE_DE) { 776 auto path = create_data_user_de_path(uuid_, userId); 777 if (delete_dir_contents_and_dir(path, true) != 0) { 778 res = error("Failed to delete " + path); 779 } 780 if (uuid_ == nullptr) { 781 path = create_data_misc_legacy_path(userId); 782 if (delete_dir_contents_and_dir(path, true) != 0) { 783 res = error("Failed to delete " + path); 784 } 785 path = create_primary_cur_profile_dir_path(userId); 786 if (delete_dir_contents_and_dir(path, true) != 0) { 787 res = error("Failed to delete " + path); 788 } 789 } 790 } 791 if (flags & FLAG_STORAGE_CE) { 792 auto path = create_data_user_ce_path(uuid_, userId); 793 if (delete_dir_contents_and_dir(path, true) != 0) { 794 res = error("Failed to delete " + path); 795 } 796 path = create_data_media_path(uuid_, userId); 797 if (delete_dir_contents_and_dir(path, true) != 0) { 798 res = error("Failed to delete " + path); 799 } 800 } 801 return res; 802} 803 804/* Try to ensure free_size bytes of storage are available. 805 * Returns 0 on success. 806 * This is rather simple-minded because doing a full LRU would 807 * be potentially memory-intensive, and without atime it would 808 * also require that apps constantly modify file metadata even 809 * when just reading from the cache, which is pretty awful. 810 */ 811binder::Status InstalldNativeService::freeCache(const std::unique_ptr<std::string>& uuid, 812 int64_t freeStorageSize, int32_t flags) { 813 ENFORCE_UID(AID_SYSTEM); 814 CHECK_ARGUMENT_UUID(uuid); 815 std::lock_guard<std::recursive_mutex> lock(mLock); 816 817 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 818 auto data_path = create_data_path(uuid_); 819 auto device = findQuotaDeviceForUuid(uuid); 820 auto noop = (flags & FLAG_FREE_CACHE_NOOP); 821 822 int64_t free = data_disk_free(data_path); 823 if (free < 0) { 824 return error("Failed to determine free space for " + data_path); 825 } 826 827 int64_t needed = freeStorageSize - free; 828 LOG(DEBUG) << "Device " << data_path << " has " << free << " free; requested " 829 << freeStorageSize << "; needed " << needed; 830 831 if (free >= freeStorageSize) { 832 return ok(); 833 } 834 835 if (flags & FLAG_FREE_CACHE_V2) { 836 // This new cache strategy fairly removes files from UIDs by deleting 837 // files from the UIDs which are most over their allocated quota 838 839 // 1. Create trackers for every known UID 840 ATRACE_BEGIN("create"); 841 std::unordered_map<uid_t, std::shared_ptr<CacheTracker>> trackers; 842 for (auto user : get_known_users(uuid_)) { 843 FTS *fts; 844 FTSENT *p; 845 char *argv[] = { 846 (char*) create_data_user_ce_path(uuid_, user).c_str(), 847 (char*) create_data_user_de_path(uuid_, user).c_str(), 848 nullptr 849 }; 850 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL))) { 851 return error("Failed to fts_open"); 852 } 853 while ((p = fts_read(fts)) != NULL) { 854 if (p->fts_info == FTS_D && p->fts_level == 1) { 855 uid_t uid = p->fts_statp->st_uid; 856 auto search = trackers.find(uid); 857 if (search != trackers.end()) { 858 search->second->addDataPath(p->fts_path); 859 } else { 860 auto tracker = std::shared_ptr<CacheTracker>(new CacheTracker( 861 multiuser_get_user_id(uid), multiuser_get_app_id(uid), device)); 862 tracker->addDataPath(p->fts_path); 863 { 864 std::lock_guard<std::recursive_mutex> lock(mCacheQuotasLock); 865 tracker->cacheQuota = mCacheQuotas[uid]; 866 } 867 if (tracker->cacheQuota == 0) { 868#if MEASURE_DEBUG 869 LOG(WARNING) << "UID " << uid << " has no cache quota; assuming 64MB"; 870#endif 871 tracker->cacheQuota = 67108864; 872 } 873 trackers[uid] = tracker; 874 } 875 fts_set(fts, p, FTS_SKIP); 876 } 877 } 878 fts_close(fts); 879 } 880 ATRACE_END(); 881 882 // 2. Populate tracker stats and insert into priority queue 883 ATRACE_BEGIN("populate"); 884 auto cmp = [](std::shared_ptr<CacheTracker> left, std::shared_ptr<CacheTracker> right) { 885 return (left->getCacheRatio() < right->getCacheRatio()); 886 }; 887 std::priority_queue<std::shared_ptr<CacheTracker>, 888 std::vector<std::shared_ptr<CacheTracker>>, decltype(cmp)> queue(cmp); 889 for (const auto& it : trackers) { 890 it.second->loadStats(); 891 queue.push(it.second); 892 } 893 ATRACE_END(); 894 895 // 3. Bounce across the queue, freeing items from whichever tracker is 896 // the most over their assigned quota 897 ATRACE_BEGIN("bounce"); 898 std::shared_ptr<CacheTracker> active; 899 while (active || !queue.empty()) { 900 // Only look at apps under quota when explicitly requested 901 if (active && (active->getCacheRatio() < 10000) 902 && !(flags & FLAG_FREE_CACHE_V2_DEFY_QUOTA)) { 903 LOG(DEBUG) << "Active ratio " << active->getCacheRatio() 904 << " isn't over quota, and defy not requested"; 905 break; 906 } 907 908 // Find the best tracker to work with; this might involve swapping 909 // if the active tracker is no longer the most over quota 910 bool nextBetter = active && !queue.empty() 911 && active->getCacheRatio() < queue.top()->getCacheRatio(); 912 if (!active || nextBetter) { 913 if (active) { 914 // Current tracker still has items, so we'll consider it 915 // again later once it bubbles up to surface 916 queue.push(active); 917 } 918 active = queue.top(); queue.pop(); 919 active->ensureItems(); 920 continue; 921 } 922 923 // If no items remain, go find another tracker 924 if (active->items.empty()) { 925 active = nullptr; 926 continue; 927 } else { 928 auto item = active->items.back(); 929 active->items.pop_back(); 930 931 LOG(DEBUG) << "Purging " << item->toString() << " from " << active->toString(); 932 if (!noop) { 933 item->purge(); 934 } 935 active->cacheUsed -= item->size; 936 needed -= item->size; 937 } 938 939 // Verify that we're actually done before bailing, since sneaky 940 // apps might be using hardlinks 941 if (needed <= 0) { 942 free = data_disk_free(data_path); 943 needed = freeStorageSize - free; 944 if (needed <= 0) { 945 break; 946 } else { 947 LOG(WARNING) << "Expected to be done but still need " << needed; 948 } 949 } 950 } 951 ATRACE_END(); 952 953 } else { 954 return error("Legacy cache logic no longer supported"); 955 } 956 957 free = data_disk_free(data_path); 958 if (free >= freeStorageSize) { 959 return ok(); 960 } else { 961 return error(StringPrintf("Failed to free up %" PRId64 " on %s; final free space %" PRId64, 962 freeStorageSize, data_path.c_str(), free)); 963 } 964} 965 966binder::Status InstalldNativeService::rmdex(const std::string& codePath, 967 const std::string& instructionSet) { 968 ENFORCE_UID(AID_SYSTEM); 969 std::lock_guard<std::recursive_mutex> lock(mLock); 970 971 char dex_path[PKG_PATH_MAX]; 972 973 const char* path = codePath.c_str(); 974 const char* instruction_set = instructionSet.c_str(); 975 976 if (validate_apk_path(path) && validate_system_app_path(path)) { 977 return error("Invalid path " + codePath); 978 } 979 980 if (!create_cache_path(dex_path, path, instruction_set)) { 981 return error("Failed to create cache path for " + codePath); 982 } 983 984 ALOGV("unlink %s\n", dex_path); 985 if (unlink(dex_path) < 0) { 986 return error(StringPrintf("Failed to unlink %s", dex_path)); 987 } else { 988 return ok(); 989 } 990} 991 992struct stats { 993 int64_t codeSize; 994 int64_t dataSize; 995 int64_t cacheSize; 996}; 997 998#if MEASURE_DEBUG 999static std::string toString(std::vector<int64_t> values) { 1000 std::stringstream res; 1001 res << "["; 1002 for (size_t i = 0; i < values.size(); i++) { 1003 res << values[i]; 1004 if (i < values.size() - 1) { 1005 res << ","; 1006 } 1007 } 1008 res << "]"; 1009 return res.str(); 1010} 1011#endif 1012 1013static void collectQuotaStats(const std::string& device, int32_t userId, 1014 int32_t appId, struct stats* stats, struct stats* extStats) { 1015 if (device.empty()) return; 1016 1017 struct dqblk dq; 1018 1019 uid_t uid = multiuser_get_uid(userId, appId); 1020 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1021 reinterpret_cast<char*>(&dq)) != 0) { 1022 if (errno != ESRCH) { 1023 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1024 } 1025 } else { 1026#if MEASURE_DEBUG 1027 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1028#endif 1029 stats->dataSize += dq.dqb_curspace; 1030 } 1031 1032 int cacheGid = multiuser_get_cache_gid(userId, appId); 1033 if (cacheGid != -1) { 1034 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), cacheGid, 1035 reinterpret_cast<char*>(&dq)) != 0) { 1036 if (errno != ESRCH) { 1037 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << cacheGid; 1038 } 1039 } else { 1040#if MEASURE_DEBUG 1041 LOG(DEBUG) << "quotactl() for GID " << cacheGid << " " << dq.dqb_curspace; 1042#endif 1043 stats->cacheSize += dq.dqb_curspace; 1044 } 1045 } 1046 1047 int extGid = multiuser_get_ext_gid(userId, appId); 1048 if (extGid != -1) { 1049 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), extGid, 1050 reinterpret_cast<char*>(&dq)) != 0) { 1051 if (errno != ESRCH) { 1052 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << extGid; 1053 } 1054 } else { 1055#if MEASURE_DEBUG 1056 LOG(DEBUG) << "quotactl() for GID " << extGid << " " << dq.dqb_curspace; 1057#endif 1058 extStats->dataSize += dq.dqb_curspace; 1059 } 1060 } 1061 1062 int sharedGid = multiuser_get_shared_gid(userId, appId); 1063 if (sharedGid != -1) { 1064 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), sharedGid, 1065 reinterpret_cast<char*>(&dq)) != 0) { 1066 if (errno != ESRCH) { 1067 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << sharedGid; 1068 } 1069 } else { 1070#if MEASURE_DEBUG 1071 LOG(DEBUG) << "quotactl() for GID " << sharedGid << " " << dq.dqb_curspace; 1072#endif 1073 stats->codeSize += dq.dqb_curspace; 1074 } 1075 } 1076} 1077 1078static void collectManualStats(const std::string& path, struct stats* stats) { 1079 DIR *d; 1080 int dfd; 1081 struct dirent *de; 1082 struct stat s; 1083 1084 d = opendir(path.c_str()); 1085 if (d == nullptr) { 1086 if (errno != ENOENT) { 1087 PLOG(WARNING) << "Failed to open " << path; 1088 } 1089 return; 1090 } 1091 dfd = dirfd(d); 1092 while ((de = readdir(d))) { 1093 const char *name = de->d_name; 1094 1095 int64_t size = 0; 1096 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 1097 size = s.st_blocks * 512; 1098 } 1099 1100 if (de->d_type == DT_DIR) { 1101 if (!strcmp(name, ".")) { 1102 // Don't recurse, but still count node size 1103 } else if (!strcmp(name, "..")) { 1104 // Don't recurse or count node size 1105 continue; 1106 } else { 1107 // Measure all children nodes 1108 size = 0; 1109 calculate_tree_size(StringPrintf("%s/%s", path.c_str(), name), &size); 1110 } 1111 1112 if (!strcmp(name, "cache") || !strcmp(name, "code_cache")) { 1113 stats->cacheSize += size; 1114 } 1115 } 1116 1117 // Legacy symlink isn't owned by app 1118 if (de->d_type == DT_LNK && !strcmp(name, "lib")) { 1119 continue; 1120 } 1121 1122 // Everything found inside is considered data 1123 stats->dataSize += size; 1124 } 1125 closedir(d); 1126} 1127 1128static void collectManualStatsForUser(const std::string& path, struct stats* stats, 1129 bool exclude_apps = false) { 1130 DIR *d; 1131 int dfd; 1132 struct dirent *de; 1133 struct stat s; 1134 1135 d = opendir(path.c_str()); 1136 if (d == nullptr) { 1137 if (errno != ENOENT) { 1138 PLOG(WARNING) << "Failed to open " << path; 1139 } 1140 return; 1141 } 1142 dfd = dirfd(d); 1143 while ((de = readdir(d))) { 1144 if (de->d_type == DT_DIR) { 1145 const char *name = de->d_name; 1146 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) != 0) { 1147 continue; 1148 } 1149 if (!strcmp(name, ".") || !strcmp(name, "..")) { 1150 continue; 1151 } else if (exclude_apps && (s.st_uid >= AID_APP_START && s.st_uid <= AID_APP_END)) { 1152 continue; 1153 } else { 1154 collectManualStats(StringPrintf("%s/%s", path.c_str(), name), stats); 1155 } 1156 } 1157 } 1158 closedir(d); 1159} 1160 1161static void collectManualExternalStatsForUser(const std::string& path, struct stats* stats) { 1162 FTS *fts; 1163 FTSENT *p; 1164 char *argv[] = { (char*) path.c_str(), nullptr }; 1165 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL))) { 1166 PLOG(ERROR) << "Failed to fts_open " << path; 1167 return; 1168 } 1169 while ((p = fts_read(fts)) != NULL) { 1170 p->fts_number = p->fts_parent->fts_number; 1171 switch (p->fts_info) { 1172 case FTS_D: 1173 if (p->fts_level == 4 1174 && !strcmp(p->fts_name, "cache") 1175 && !strcmp(p->fts_parent->fts_parent->fts_name, "data") 1176 && !strcmp(p->fts_parent->fts_parent->fts_parent->fts_name, "Android")) { 1177 p->fts_number = 1; 1178 } 1179 // Fall through to count the directory 1180 case FTS_DEFAULT: 1181 case FTS_F: 1182 case FTS_SL: 1183 case FTS_SLNONE: 1184 int64_t size = (p->fts_statp->st_blocks * 512); 1185 if (p->fts_number == 1) { 1186 stats->cacheSize += size; 1187 } 1188 stats->dataSize += size; 1189 break; 1190 } 1191 } 1192 fts_close(fts); 1193} 1194 1195binder::Status InstalldNativeService::getAppSize(const std::unique_ptr<std::string>& uuid, 1196 const std::vector<std::string>& packageNames, int32_t userId, int32_t flags, 1197 int32_t appId, const std::vector<int64_t>& ceDataInodes, 1198 const std::vector<std::string>& codePaths, std::vector<int64_t>* _aidl_return) { 1199 ENFORCE_UID(AID_SYSTEM); 1200 CHECK_ARGUMENT_UUID(uuid); 1201 for (auto packageName : packageNames) { 1202 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1203 } 1204 // NOTE: Locking is relaxed on this method, since it's limited to 1205 // read-only measurements without mutation. 1206 1207 // When modifying this logic, always verify using tests: 1208 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetAppSize 1209 1210#if MEASURE_DEBUG 1211 LOG(INFO) << "Measuring user " << userId << " app " << appId; 1212#endif 1213 1214 // Here's a summary of the common storage locations across the platform, 1215 // and how they're each tagged: 1216 // 1217 // /data/app/com.example UID system 1218 // /data/app/com.example/oat UID system 1219 // /data/user/0/com.example UID u0_a10 GID u0_a10 1220 // /data/user/0/com.example/cache UID u0_a10 GID u0_a10_cache 1221 // /data/media/0/foo.txt UID u0_media_rw 1222 // /data/media/0/bar.jpg UID u0_media_rw GID u0_media_image 1223 // /data/media/0/Android/data/com.example UID u0_media_rw GID u0_a10_ext 1224 // /data/media/0/Android/data/com.example/cache UID u0_media_rw GID u0_a10_ext_cache 1225 // /data/media/obb/com.example UID system 1226 1227 struct stats stats; 1228 struct stats extStats; 1229 memset(&stats, 0, sizeof(stats)); 1230 memset(&extStats, 0, sizeof(extStats)); 1231 1232 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1233 1234 auto device = findQuotaDeviceForUuid(uuid); 1235 if (device.empty()) { 1236 flags &= ~FLAG_USE_QUOTA; 1237 } 1238 1239 ATRACE_BEGIN("obb"); 1240 for (auto packageName : packageNames) { 1241 auto obbCodePath = create_data_media_obb_path(uuid_, packageName.c_str()); 1242 calculate_tree_size(obbCodePath, &extStats.codeSize); 1243 } 1244 ATRACE_END(); 1245 1246 if (flags & FLAG_USE_QUOTA && appId >= AID_APP_START) { 1247 ATRACE_BEGIN("code"); 1248 for (auto codePath : codePaths) { 1249 calculate_tree_size(codePath, &stats.codeSize, -1, 1250 multiuser_get_shared_gid(userId, appId)); 1251 } 1252 ATRACE_END(); 1253 1254 ATRACE_BEGIN("quota"); 1255 collectQuotaStats(device, userId, appId, &stats, &extStats); 1256 ATRACE_END(); 1257 1258 } else { 1259 ATRACE_BEGIN("code"); 1260 for (auto codePath : codePaths) { 1261 calculate_tree_size(codePath, &stats.codeSize); 1262 } 1263 ATRACE_END(); 1264 1265 for (size_t i = 0; i < packageNames.size(); i++) { 1266 const char* pkgname = packageNames[i].c_str(); 1267 1268 ATRACE_BEGIN("data"); 1269 auto cePath = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInodes[i]); 1270 collectManualStats(cePath, &stats); 1271 auto dePath = create_data_user_de_package_path(uuid_, userId, pkgname); 1272 collectManualStats(dePath, &stats); 1273 ATRACE_END(); 1274 1275 ATRACE_BEGIN("profiles"); 1276 auto userProfilePath = create_primary_current_profile_package_dir_path(userId, pkgname); 1277 calculate_tree_size(userProfilePath, &stats.dataSize); 1278 auto refProfilePath = create_primary_reference_profile_package_dir_path(pkgname); 1279 calculate_tree_size(refProfilePath, &stats.codeSize); 1280 ATRACE_END(); 1281 1282 ATRACE_BEGIN("external"); 1283 auto extPath = create_data_media_package_path(uuid_, userId, "data", pkgname); 1284 collectManualStats(extPath, &extStats); 1285 auto mediaPath = create_data_media_package_path(uuid_, userId, "media", pkgname); 1286 calculate_tree_size(mediaPath, &extStats.dataSize); 1287 ATRACE_END(); 1288 } 1289 1290 ATRACE_BEGIN("dalvik"); 1291 int32_t sharedGid = multiuser_get_shared_gid(userId, appId); 1292 if (sharedGid != -1) { 1293 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1294 sharedGid, -1); 1295 } 1296 calculate_tree_size(create_primary_cur_profile_dir_path(userId), &stats.dataSize, 1297 multiuser_get_uid(userId, appId), -1); 1298 ATRACE_END(); 1299 } 1300 1301 std::vector<int64_t> ret; 1302 ret.push_back(stats.codeSize); 1303 ret.push_back(stats.dataSize); 1304 ret.push_back(stats.cacheSize); 1305 ret.push_back(extStats.codeSize); 1306 ret.push_back(extStats.dataSize); 1307 ret.push_back(extStats.cacheSize); 1308#if MEASURE_DEBUG 1309 LOG(DEBUG) << "Final result " << toString(ret); 1310#endif 1311 *_aidl_return = ret; 1312 return ok(); 1313} 1314 1315binder::Status InstalldNativeService::getUserSize(const std::unique_ptr<std::string>& uuid, 1316 int32_t userId, int32_t flags, const std::vector<int32_t>& appIds, 1317 std::vector<int64_t>* _aidl_return) { 1318 ENFORCE_UID(AID_SYSTEM); 1319 CHECK_ARGUMENT_UUID(uuid); 1320 // NOTE: Locking is relaxed on this method, since it's limited to 1321 // read-only measurements without mutation. 1322 1323 // When modifying this logic, always verify using tests: 1324 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetUserSize 1325 1326#if MEASURE_DEBUG 1327 LOG(INFO) << "Measuring user " << userId; 1328#endif 1329 1330 struct stats stats; 1331 struct stats extStats; 1332 memset(&stats, 0, sizeof(stats)); 1333 memset(&extStats, 0, sizeof(extStats)); 1334 1335 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1336 1337 auto device = findQuotaDeviceForUuid(uuid); 1338 if (device.empty()) { 1339 flags &= ~FLAG_USE_QUOTA; 1340 } 1341 1342 if (flags & FLAG_USE_QUOTA) { 1343 struct dqblk dq; 1344 1345 ATRACE_BEGIN("obb"); 1346 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), AID_MEDIA_OBB, 1347 reinterpret_cast<char*>(&dq)) != 0) { 1348 if (errno != ESRCH) { 1349 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << AID_MEDIA_OBB; 1350 } 1351 } else { 1352#if MEASURE_DEBUG 1353 LOG(DEBUG) << "quotactl() for GID " << AID_MEDIA_OBB << " " << dq.dqb_curspace; 1354#endif 1355 extStats.codeSize += dq.dqb_curspace; 1356 } 1357 ATRACE_END(); 1358 1359 ATRACE_BEGIN("code"); 1360 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize, -1, -1, true); 1361 ATRACE_END(); 1362 1363 ATRACE_BEGIN("data"); 1364 auto cePath = create_data_user_ce_path(uuid_, userId); 1365 collectManualStatsForUser(cePath, &stats, true); 1366 auto dePath = create_data_user_de_path(uuid_, userId); 1367 collectManualStatsForUser(dePath, &stats, true); 1368 ATRACE_END(); 1369 1370 ATRACE_BEGIN("profile"); 1371 auto userProfilePath = create_primary_cur_profile_dir_path(userId); 1372 calculate_tree_size(userProfilePath, &stats.dataSize, -1, -1, true); 1373 auto refProfilePath = create_primary_ref_profile_dir_path(); 1374 calculate_tree_size(refProfilePath, &stats.codeSize, -1, -1, true); 1375 ATRACE_END(); 1376 1377 ATRACE_BEGIN("external"); 1378 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1379 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1380 reinterpret_cast<char*>(&dq)) != 0) { 1381 if (errno != ESRCH) { 1382 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1383 } 1384 } else { 1385#if MEASURE_DEBUG 1386 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1387#endif 1388 extStats.dataSize += dq.dqb_curspace; 1389 } 1390 ATRACE_END(); 1391 1392 ATRACE_BEGIN("dalvik"); 1393 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1394 -1, -1, true); 1395 calculate_tree_size(create_primary_cur_profile_dir_path(userId), &stats.dataSize, 1396 -1, -1, true); 1397 ATRACE_END(); 1398 1399 ATRACE_BEGIN("quota"); 1400 for (auto appId : appIds) { 1401 if (appId >= AID_APP_START) { 1402 collectQuotaStats(device, userId, appId, &stats, &extStats); 1403#if MEASURE_DEBUG 1404 // Sleep to make sure we don't lose logs 1405 usleep(1); 1406#endif 1407 } 1408 } 1409 ATRACE_END(); 1410 } else { 1411 ATRACE_BEGIN("obb"); 1412 auto obbPath = create_data_path(uuid_) + "/media/obb"; 1413 calculate_tree_size(obbPath, &extStats.codeSize); 1414 ATRACE_END(); 1415 1416 ATRACE_BEGIN("code"); 1417 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize); 1418 ATRACE_END(); 1419 1420 ATRACE_BEGIN("data"); 1421 auto cePath = create_data_user_ce_path(uuid_, userId); 1422 collectManualStatsForUser(cePath, &stats); 1423 auto dePath = create_data_user_de_path(uuid_, userId); 1424 collectManualStatsForUser(dePath, &stats); 1425 ATRACE_END(); 1426 1427 ATRACE_BEGIN("profile"); 1428 auto userProfilePath = create_primary_cur_profile_dir_path(userId); 1429 calculate_tree_size(userProfilePath, &stats.dataSize); 1430 auto refProfilePath = create_primary_ref_profile_dir_path(); 1431 calculate_tree_size(refProfilePath, &stats.codeSize); 1432 ATRACE_END(); 1433 1434 ATRACE_BEGIN("external"); 1435 auto dataMediaPath = create_data_media_path(uuid_, userId); 1436 collectManualExternalStatsForUser(dataMediaPath, &extStats); 1437#if MEASURE_DEBUG 1438 LOG(DEBUG) << "Measured external data " << extStats.dataSize << " cache " 1439 << extStats.cacheSize; 1440#endif 1441 ATRACE_END(); 1442 1443 ATRACE_BEGIN("dalvik"); 1444 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize); 1445 calculate_tree_size(create_primary_cur_profile_dir_path(userId), &stats.dataSize); 1446 ATRACE_END(); 1447 } 1448 1449 std::vector<int64_t> ret; 1450 ret.push_back(stats.codeSize); 1451 ret.push_back(stats.dataSize); 1452 ret.push_back(stats.cacheSize); 1453 ret.push_back(extStats.codeSize); 1454 ret.push_back(extStats.dataSize); 1455 ret.push_back(extStats.cacheSize); 1456#if MEASURE_DEBUG 1457 LOG(DEBUG) << "Final result " << toString(ret); 1458#endif 1459 *_aidl_return = ret; 1460 return ok(); 1461} 1462 1463binder::Status InstalldNativeService::getExternalSize(const std::unique_ptr<std::string>& uuid, 1464 int32_t userId, int32_t flags, std::vector<int64_t>* _aidl_return) { 1465 ENFORCE_UID(AID_SYSTEM); 1466 CHECK_ARGUMENT_UUID(uuid); 1467 // NOTE: Locking is relaxed on this method, since it's limited to 1468 // read-only measurements without mutation. 1469 1470 // When modifying this logic, always verify using tests: 1471 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetExternalSize 1472 1473#if MEASURE_DEBUG 1474 LOG(INFO) << "Measuring external " << userId; 1475#endif 1476 1477 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1478 1479 int64_t totalSize = 0; 1480 int64_t audioSize = 0; 1481 int64_t videoSize = 0; 1482 int64_t imageSize = 0; 1483 1484 auto device = findQuotaDeviceForUuid(uuid); 1485 if (device.empty()) { 1486 flags &= ~FLAG_USE_QUOTA; 1487 } 1488 1489 if (flags & FLAG_USE_QUOTA) { 1490 struct dqblk dq; 1491 1492 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1493 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1494 reinterpret_cast<char*>(&dq)) != 0) { 1495 if (errno != ESRCH) { 1496 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1497 } 1498 } else { 1499#if MEASURE_DEBUG 1500 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1501#endif 1502 totalSize = dq.dqb_curspace; 1503 } 1504 1505 gid_t audioGid = multiuser_get_uid(userId, AID_MEDIA_AUDIO); 1506 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), audioGid, 1507 reinterpret_cast<char*>(&dq)) == 0) { 1508#if MEASURE_DEBUG 1509 LOG(DEBUG) << "quotactl() for GID " << audioGid << " " << dq.dqb_curspace; 1510#endif 1511 audioSize = dq.dqb_curspace; 1512 } 1513 gid_t videoGid = multiuser_get_uid(userId, AID_MEDIA_VIDEO); 1514 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), videoGid, 1515 reinterpret_cast<char*>(&dq)) == 0) { 1516#if MEASURE_DEBUG 1517 LOG(DEBUG) << "quotactl() for GID " << videoGid << " " << dq.dqb_curspace; 1518#endif 1519 videoSize = dq.dqb_curspace; 1520 } 1521 gid_t imageGid = multiuser_get_uid(userId, AID_MEDIA_IMAGE); 1522 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), imageGid, 1523 reinterpret_cast<char*>(&dq)) == 0) { 1524#if MEASURE_DEBUG 1525 LOG(DEBUG) << "quotactl() for GID " << imageGid << " " << dq.dqb_curspace; 1526#endif 1527 imageSize = dq.dqb_curspace; 1528 } 1529 } else { 1530 FTS *fts; 1531 FTSENT *p; 1532 auto path = create_data_media_path(uuid_, userId); 1533 char *argv[] = { (char*) path.c_str(), nullptr }; 1534 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, NULL))) { 1535 return error("Failed to fts_open " + path); 1536 } 1537 while ((p = fts_read(fts)) != NULL) { 1538 char* ext; 1539 int64_t size = (p->fts_statp->st_blocks * 512); 1540 switch (p->fts_info) { 1541 case FTS_F: 1542 // Only categorize files not belonging to apps 1543 if (p->fts_parent->fts_number == 0) { 1544 ext = strrchr(p->fts_name, '.'); 1545 if (ext != nullptr) { 1546 switch (MatchExtension(++ext)) { 1547 case AID_MEDIA_AUDIO: audioSize += size; break; 1548 case AID_MEDIA_VIDEO: videoSize += size; break; 1549 case AID_MEDIA_IMAGE: imageSize += size; break; 1550 } 1551 } 1552 } 1553 // Fall through to always count against total 1554 case FTS_D: 1555 // Ignore data belonging to specific apps 1556 p->fts_number = p->fts_parent->fts_number; 1557 if (p->fts_level == 1 && !strcmp(p->fts_name, "Android")) { 1558 p->fts_number = 1; 1559 } 1560 case FTS_DEFAULT: 1561 case FTS_SL: 1562 case FTS_SLNONE: 1563 totalSize += size; 1564 break; 1565 } 1566 } 1567 fts_close(fts); 1568 } 1569 1570 std::vector<int64_t> ret; 1571 ret.push_back(totalSize); 1572 ret.push_back(audioSize); 1573 ret.push_back(videoSize); 1574 ret.push_back(imageSize); 1575#if MEASURE_DEBUG 1576 LOG(DEBUG) << "Final result " << toString(ret); 1577#endif 1578 *_aidl_return = ret; 1579 return ok(); 1580} 1581 1582binder::Status InstalldNativeService::setAppQuota(const std::unique_ptr<std::string>& uuid, 1583 int32_t userId, int32_t appId, int64_t cacheQuota) { 1584 ENFORCE_UID(AID_SYSTEM); 1585 CHECK_ARGUMENT_UUID(uuid); 1586 std::lock_guard<std::recursive_mutex> lock(mCacheQuotasLock); 1587 1588 int32_t uid = multiuser_get_uid(userId, appId); 1589 mCacheQuotas[uid] = cacheQuota; 1590 1591 return ok(); 1592} 1593 1594// Dumps the contents of a profile file, using pkgname's dex files for pretty 1595// printing the result. 1596binder::Status InstalldNativeService::dumpProfiles(int32_t uid, const std::string& packageName, 1597 const std::string& codePaths, bool* _aidl_return) { 1598 ENFORCE_UID(AID_SYSTEM); 1599 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1600 std::lock_guard<std::recursive_mutex> lock(mLock); 1601 1602 const char* pkgname = packageName.c_str(); 1603 const char* code_paths = codePaths.c_str(); 1604 1605 *_aidl_return = dump_profiles(uid, pkgname, code_paths); 1606 return ok(); 1607} 1608 1609// TODO: Consider returning error codes. 1610binder::Status InstalldNativeService::mergeProfiles(int32_t uid, const std::string& packageName, 1611 bool* _aidl_return) { 1612 ENFORCE_UID(AID_SYSTEM); 1613 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1614 std::lock_guard<std::recursive_mutex> lock(mLock); 1615 1616 *_aidl_return = analyze_primary_profiles(uid, packageName); 1617 return ok(); 1618} 1619 1620binder::Status InstalldNativeService::dexopt(const std::string& apkPath, int32_t uid, 1621 const std::unique_ptr<std::string>& packageName, const std::string& instructionSet, 1622 int32_t dexoptNeeded, const std::unique_ptr<std::string>& outputPath, int32_t dexFlags, 1623 const std::string& compilerFilter, const std::unique_ptr<std::string>& uuid, 1624 const std::unique_ptr<std::string>& sharedLibraries) { 1625 ENFORCE_UID(AID_SYSTEM); 1626 CHECK_ARGUMENT_UUID(uuid); 1627 if (packageName && *packageName != "*") { 1628 CHECK_ARGUMENT_PACKAGE_NAME(*packageName); 1629 } 1630 std::lock_guard<std::recursive_mutex> lock(mLock); 1631 1632 const char* apk_path = apkPath.c_str(); 1633 const char* pkgname = packageName ? packageName->c_str() : "*"; 1634 const char* instruction_set = instructionSet.c_str(); 1635 const char* oat_dir = outputPath ? outputPath->c_str() : nullptr; 1636 const char* compiler_filter = compilerFilter.c_str(); 1637 const char* volume_uuid = uuid ? uuid->c_str() : nullptr; 1638 const char* shared_libraries = sharedLibraries ? sharedLibraries->c_str() : nullptr; 1639 1640 int res = android::installd::dexopt(apk_path, uid, pkgname, instruction_set, dexoptNeeded, 1641 oat_dir, dexFlags, compiler_filter, volume_uuid, shared_libraries); 1642 return res ? error(res, "Failed to dexopt") : ok(); 1643} 1644 1645binder::Status InstalldNativeService::markBootComplete(const std::string& instructionSet) { 1646 ENFORCE_UID(AID_SYSTEM); 1647 std::lock_guard<std::recursive_mutex> lock(mLock); 1648 1649 const char* instruction_set = instructionSet.c_str(); 1650 1651 char boot_marker_path[PKG_PATH_MAX]; 1652 sprintf(boot_marker_path, 1653 "%s/%s/%s/.booting", 1654 android_data_dir.path, 1655 DALVIK_CACHE, 1656 instruction_set); 1657 1658 ALOGV("mark_boot_complete : %s", boot_marker_path); 1659 if (unlink(boot_marker_path) != 0) { 1660 return error(StringPrintf("Failed to unlink %s", boot_marker_path)); 1661 } 1662 return ok(); 1663} 1664 1665void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid, 1666 struct stat* statbuf) 1667{ 1668 while (path[basepos] != 0) { 1669 if (path[basepos] == '/') { 1670 path[basepos] = 0; 1671 if (lstat(path, statbuf) < 0) { 1672 ALOGV("Making directory: %s\n", path); 1673 if (mkdir(path, mode) == 0) { 1674 chown(path, uid, gid); 1675 } else { 1676 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno)); 1677 } 1678 } 1679 path[basepos] = '/'; 1680 basepos++; 1681 } 1682 basepos++; 1683 } 1684} 1685 1686binder::Status InstalldNativeService::linkNativeLibraryDirectory( 1687 const std::unique_ptr<std::string>& uuid, const std::string& packageName, 1688 const std::string& nativeLibPath32, int32_t userId) { 1689 ENFORCE_UID(AID_SYSTEM); 1690 CHECK_ARGUMENT_UUID(uuid); 1691 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1692 std::lock_guard<std::recursive_mutex> lock(mLock); 1693 1694 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1695 const char* pkgname = packageName.c_str(); 1696 const char* asecLibDir = nativeLibPath32.c_str(); 1697 struct stat s, libStat; 1698 binder::Status res = ok(); 1699 1700 auto _pkgdir = create_data_user_ce_package_path(uuid_, userId, pkgname); 1701 auto _libsymlink = _pkgdir + PKG_LIB_POSTFIX; 1702 1703 const char* pkgdir = _pkgdir.c_str(); 1704 const char* libsymlink = _libsymlink.c_str(); 1705 1706 if (stat(pkgdir, &s) < 0) { 1707 return error("Failed to stat " + _pkgdir); 1708 } 1709 1710 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) { 1711 return error("Failed to chown " + _pkgdir); 1712 } 1713 1714 if (chmod(pkgdir, 0700) < 0) { 1715 res = error("Failed to chmod " + _pkgdir); 1716 goto out; 1717 } 1718 1719 if (lstat(libsymlink, &libStat) < 0) { 1720 if (errno != ENOENT) { 1721 res = error("Failed to stat " + _libsymlink); 1722 goto out; 1723 } 1724 } else { 1725 if (S_ISDIR(libStat.st_mode)) { 1726 if (delete_dir_contents(libsymlink, 1, NULL) < 0) { 1727 res = error("Failed to delete " + _libsymlink); 1728 goto out; 1729 } 1730 } else if (S_ISLNK(libStat.st_mode)) { 1731 if (unlink(libsymlink) < 0) { 1732 res = error("Failed to unlink " + _libsymlink); 1733 goto out; 1734 } 1735 } 1736 } 1737 1738 if (symlink(asecLibDir, libsymlink) < 0) { 1739 res = error("Failed to symlink " + _libsymlink + " to " + nativeLibPath32); 1740 goto out; 1741 } 1742 1743out: 1744 if (chmod(pkgdir, s.st_mode) < 0) { 1745 auto msg = "Failed to cleanup chmod " + _pkgdir; 1746 if (res.isOk()) { 1747 res = error(msg); 1748 } else { 1749 PLOG(ERROR) << msg; 1750 } 1751 } 1752 1753 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) { 1754 auto msg = "Failed to cleanup chown " + _pkgdir; 1755 if (res.isOk()) { 1756 res = error(msg); 1757 } else { 1758 PLOG(ERROR) << msg; 1759 } 1760 } 1761 1762 return res; 1763} 1764 1765static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd) 1766{ 1767 static const char *IDMAP_BIN = "/system/bin/idmap"; 1768 static const size_t MAX_INT_LEN = 32; 1769 char idmap_str[MAX_INT_LEN]; 1770 1771 snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd); 1772 1773 execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL); 1774 ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno)); 1775} 1776 1777// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix) 1778// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap 1779static int flatten_path(const char *prefix, const char *suffix, 1780 const char *overlay_path, char *idmap_path, size_t N) 1781{ 1782 if (overlay_path == NULL || idmap_path == NULL) { 1783 return -1; 1784 } 1785 const size_t len_overlay_path = strlen(overlay_path); 1786 // will access overlay_path + 1 further below; requires absolute path 1787 if (len_overlay_path < 2 || *overlay_path != '/') { 1788 return -1; 1789 } 1790 const size_t len_idmap_root = strlen(prefix); 1791 const size_t len_suffix = strlen(suffix); 1792 if (SIZE_MAX - len_idmap_root < len_overlay_path || 1793 SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) { 1794 // additions below would cause overflow 1795 return -1; 1796 } 1797 if (N < len_idmap_root + len_overlay_path + len_suffix) { 1798 return -1; 1799 } 1800 memset(idmap_path, 0, N); 1801 snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix); 1802 char *ch = idmap_path + len_idmap_root; 1803 while (*ch != '\0') { 1804 if (*ch == '/') { 1805 *ch = '@'; 1806 } 1807 ++ch; 1808 } 1809 return 0; 1810} 1811 1812binder::Status InstalldNativeService::idmap(const std::string& targetApkPath, 1813 const std::string& overlayApkPath, int32_t uid) { 1814 ENFORCE_UID(AID_SYSTEM); 1815 std::lock_guard<std::recursive_mutex> lock(mLock); 1816 1817 const char* target_apk = targetApkPath.c_str(); 1818 const char* overlay_apk = overlayApkPath.c_str(); 1819 ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid); 1820 1821 int idmap_fd = -1; 1822 char idmap_path[PATH_MAX]; 1823 1824 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1825 idmap_path, sizeof(idmap_path)) == -1) { 1826 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1827 goto fail; 1828 } 1829 1830 unlink(idmap_path); 1831 idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644); 1832 if (idmap_fd < 0) { 1833 ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno)); 1834 goto fail; 1835 } 1836 if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) { 1837 ALOGE("idmap cannot chown '%s'\n", idmap_path); 1838 goto fail; 1839 } 1840 if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { 1841 ALOGE("idmap cannot chmod '%s'\n", idmap_path); 1842 goto fail; 1843 } 1844 1845 pid_t pid; 1846 pid = fork(); 1847 if (pid == 0) { 1848 /* child -- drop privileges before continuing */ 1849 if (setgid(uid) != 0) { 1850 ALOGE("setgid(%d) failed during idmap\n", uid); 1851 exit(1); 1852 } 1853 if (setuid(uid) != 0) { 1854 ALOGE("setuid(%d) failed during idmap\n", uid); 1855 exit(1); 1856 } 1857 if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) { 1858 ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno)); 1859 exit(1); 1860 } 1861 1862 run_idmap(target_apk, overlay_apk, idmap_fd); 1863 exit(1); /* only if exec call to idmap failed */ 1864 } else { 1865 int status = wait_child(pid); 1866 if (status != 0) { 1867 ALOGE("idmap failed, status=0x%04x\n", status); 1868 goto fail; 1869 } 1870 } 1871 1872 close(idmap_fd); 1873 return ok(); 1874fail: 1875 if (idmap_fd >= 0) { 1876 close(idmap_fd); 1877 unlink(idmap_path); 1878 } 1879 return error(); 1880} 1881 1882binder::Status InstalldNativeService::removeIdmap(const std::string& overlayApkPath) { 1883 const char* overlay_apk = overlayApkPath.c_str(); 1884 char idmap_path[PATH_MAX]; 1885 1886 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1887 idmap_path, sizeof(idmap_path)) == -1) { 1888 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1889 return error(); 1890 } 1891 if (unlink(idmap_path) < 0) { 1892 ALOGE("couldn't unlink idmap file %s\n", idmap_path); 1893 return error(); 1894 } 1895 return ok(); 1896} 1897 1898binder::Status InstalldNativeService::restoreconAppData(const std::unique_ptr<std::string>& uuid, 1899 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 1900 const std::string& seInfo) { 1901 ENFORCE_UID(AID_SYSTEM); 1902 CHECK_ARGUMENT_UUID(uuid); 1903 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1904 std::lock_guard<std::recursive_mutex> lock(mLock); 1905 1906 binder::Status res = ok(); 1907 1908 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here. 1909 unsigned int seflags = SELINUX_ANDROID_RESTORECON_RECURSE; 1910 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1911 const char* pkgName = packageName.c_str(); 1912 const char* seinfo = seInfo.c_str(); 1913 1914 uid_t uid = multiuser_get_uid(userId, appId); 1915 if (flags & FLAG_STORAGE_CE) { 1916 auto path = create_data_user_ce_package_path(uuid_, userId, pkgName); 1917 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 1918 res = error("restorecon failed for " + path); 1919 } 1920 } 1921 if (flags & FLAG_STORAGE_DE) { 1922 auto path = create_data_user_de_package_path(uuid_, userId, pkgName); 1923 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 1924 res = error("restorecon failed for " + path); 1925 } 1926 } 1927 return res; 1928} 1929 1930binder::Status InstalldNativeService::createOatDir(const std::string& oatDir, 1931 const std::string& instructionSet) { 1932 ENFORCE_UID(AID_SYSTEM); 1933 std::lock_guard<std::recursive_mutex> lock(mLock); 1934 1935 const char* oat_dir = oatDir.c_str(); 1936 const char* instruction_set = instructionSet.c_str(); 1937 char oat_instr_dir[PKG_PATH_MAX]; 1938 1939 if (validate_apk_path(oat_dir)) { 1940 return error("Invalid path " + oatDir); 1941 } 1942 if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1943 return error("Failed to prepare " + oatDir); 1944 } 1945 if (selinux_android_restorecon(oat_dir, 0)) { 1946 return error("Failed to restorecon " + oatDir); 1947 } 1948 snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set); 1949 if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1950 return error(StringPrintf("Failed to prepare %s", oat_instr_dir)); 1951 } 1952 return ok(); 1953} 1954 1955binder::Status InstalldNativeService::rmPackageDir(const std::string& packageDir) { 1956 ENFORCE_UID(AID_SYSTEM); 1957 std::lock_guard<std::recursive_mutex> lock(mLock); 1958 1959 if (validate_apk_path(packageDir.c_str())) { 1960 return error("Invalid path " + packageDir); 1961 } 1962 if (delete_dir_contents_and_dir(packageDir) != 0) { 1963 return error("Failed to delete " + packageDir); 1964 } 1965 return ok(); 1966} 1967 1968binder::Status InstalldNativeService::linkFile(const std::string& relativePath, 1969 const std::string& fromBase, const std::string& toBase) { 1970 ENFORCE_UID(AID_SYSTEM); 1971 std::lock_guard<std::recursive_mutex> lock(mLock); 1972 1973 const char* relative_path = relativePath.c_str(); 1974 const char* from_base = fromBase.c_str(); 1975 const char* to_base = toBase.c_str(); 1976 char from_path[PKG_PATH_MAX]; 1977 char to_path[PKG_PATH_MAX]; 1978 snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path); 1979 snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path); 1980 1981 if (validate_apk_path_subdirs(from_path)) { 1982 return error(StringPrintf("Invalid from path %s", from_path)); 1983 } 1984 1985 if (validate_apk_path_subdirs(to_path)) { 1986 return error(StringPrintf("Invalid to path %s", to_path)); 1987 } 1988 1989 if (link(from_path, to_path) < 0) { 1990 return error(StringPrintf("Failed to link from %s to %s", from_path, to_path)); 1991 } 1992 1993 return ok(); 1994} 1995 1996binder::Status InstalldNativeService::moveAb(const std::string& apkPath, 1997 const std::string& instructionSet, const std::string& outputPath) { 1998 ENFORCE_UID(AID_SYSTEM); 1999 std::lock_guard<std::recursive_mutex> lock(mLock); 2000 2001 const char* apk_path = apkPath.c_str(); 2002 const char* instruction_set = instructionSet.c_str(); 2003 const char* oat_dir = outputPath.c_str(); 2004 2005 bool success = move_ab(apk_path, instruction_set, oat_dir); 2006 return success ? ok() : error(); 2007} 2008 2009binder::Status InstalldNativeService::deleteOdex(const std::string& apkPath, 2010 const std::string& instructionSet, const std::string& outputPath) { 2011 ENFORCE_UID(AID_SYSTEM); 2012 std::lock_guard<std::recursive_mutex> lock(mLock); 2013 2014 const char* apk_path = apkPath.c_str(); 2015 const char* instruction_set = instructionSet.c_str(); 2016 const char* oat_dir = outputPath.c_str(); 2017 2018 bool res = delete_odex(apk_path, instruction_set, oat_dir); 2019 return res ? ok() : error(); 2020} 2021 2022binder::Status InstalldNativeService::reconcileSecondaryDexFile( 2023 const std::string& dexPath, const std::string& packageName, int32_t uid, 2024 const std::vector<std::string>& isas, const std::unique_ptr<std::string>& volumeUuid, 2025 int32_t storage_flag, bool* _aidl_return) { 2026 ENFORCE_UID(AID_SYSTEM); 2027 CHECK_ARGUMENT_UUID(volumeUuid); 2028 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 2029 2030 std::lock_guard<std::recursive_mutex> lock(mLock); 2031 bool result = android::installd::reconcile_secondary_dex_file( 2032 dexPath, packageName, uid, isas, volumeUuid, storage_flag, _aidl_return); 2033 return result ? ok() : error(); 2034} 2035 2036binder::Status InstalldNativeService::invalidateMounts() { 2037 ENFORCE_UID(AID_SYSTEM); 2038 std::lock_guard<std::recursive_mutex> lock(mQuotaDevicesLock); 2039 2040 mQuotaDevices.clear(); 2041 2042 std::ifstream in("/proc/mounts"); 2043 if (!in.is_open()) { 2044 return error("Failed to read mounts"); 2045 } 2046 2047 std::string source; 2048 std::string target; 2049 std::string ignored; 2050 struct dqblk dq; 2051 while (!in.eof()) { 2052 std::getline(in, source, ' '); 2053 std::getline(in, target, ' '); 2054 std::getline(in, ignored); 2055 2056 if (source.compare(0, 11, "/dev/block/") == 0) { 2057 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), source.c_str(), 0, 2058 reinterpret_cast<char*>(&dq)) == 0) { 2059 LOG(DEBUG) << "Found " << source << " with quota"; 2060 mQuotaDevices[target] = source; 2061 2062 // ext4 only enables DQUOT_USAGE_ENABLED by default, so we 2063 // need to kick it again to enable DQUOT_LIMITS_ENABLED. 2064 if (quotactl(QCMD(Q_QUOTAON, USRQUOTA), source.c_str(), QFMT_VFS_V1, nullptr) != 0 2065 && errno != EBUSY) { 2066 PLOG(ERROR) << "Failed to enable USRQUOTA on " << source; 2067 } 2068 if (quotactl(QCMD(Q_QUOTAON, GRPQUOTA), source.c_str(), QFMT_VFS_V1, nullptr) != 0 2069 && errno != EBUSY) { 2070 PLOG(ERROR) << "Failed to enable GRPQUOTA on " << source; 2071 } 2072 } 2073 } 2074 } 2075 return ok(); 2076} 2077 2078std::string InstalldNativeService::findQuotaDeviceForUuid( 2079 const std::unique_ptr<std::string>& uuid) { 2080 std::lock_guard<std::recursive_mutex> lock(mQuotaDevicesLock); 2081 auto path = create_data_path(uuid ? uuid->c_str() : nullptr); 2082 return mQuotaDevices[path]; 2083} 2084 2085binder::Status InstalldNativeService::isQuotaSupported( 2086 const std::unique_ptr<std::string>& volumeUuid, bool* _aidl_return) { 2087 *_aidl_return = !findQuotaDeviceForUuid(volumeUuid).empty(); 2088 return ok(); 2089} 2090 2091} // namespace installd 2092} // namespace android 2093