InstalldNativeService.cpp revision 20e0fd800ffa9eaa9e95f3c9b84e1610068827ee
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_NOOP = 1 << 14; 90 91namespace { 92 93constexpr const char* kDump = "android.permission.DUMP"; 94 95static binder::Status ok() { 96 return binder::Status::ok(); 97} 98 99static binder::Status exception(uint32_t code, const std::string& msg) { 100 return binder::Status::fromExceptionCode(code, String8(msg.c_str())); 101} 102 103static binder::Status error() { 104 return binder::Status::fromServiceSpecificError(errno); 105} 106 107static binder::Status error(const std::string& msg) { 108 PLOG(ERROR) << msg; 109 return binder::Status::fromServiceSpecificError(errno, String8(msg.c_str())); 110} 111 112static binder::Status error(uint32_t code, const std::string& msg) { 113 LOG(ERROR) << msg << " (" << code << ")"; 114 return binder::Status::fromServiceSpecificError(code, String8(msg.c_str())); 115} 116 117binder::Status checkPermission(const char* permission) { 118 pid_t pid; 119 uid_t uid; 120 121 if (checkCallingPermission(String16(permission), reinterpret_cast<int32_t*>(&pid), 122 reinterpret_cast<int32_t*>(&uid))) { 123 return ok(); 124 } else { 125 return exception(binder::Status::EX_SECURITY, 126 StringPrintf("UID %d / PID %d lacks permission %s", uid, pid, permission)); 127 } 128} 129 130binder::Status checkUid(uid_t expectedUid) { 131 uid_t uid = IPCThreadState::self()->getCallingUid(); 132 if (uid == expectedUid || uid == AID_ROOT) { 133 return ok(); 134 } else { 135 return exception(binder::Status::EX_SECURITY, 136 StringPrintf("UID %d is not expected UID %d", uid, expectedUid)); 137 } 138} 139 140binder::Status checkArgumentUuid(const std::unique_ptr<std::string>& uuid) { 141 if (!uuid || is_valid_filename(*uuid)) { 142 return ok(); 143 } else { 144 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 145 StringPrintf("UUID %s is malformed", uuid->c_str())); 146 } 147} 148 149binder::Status checkArgumentPackageName(const std::string& packageName) { 150 if (is_valid_package_name(packageName.c_str())) { 151 return ok(); 152 } else { 153 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 154 StringPrintf("Package name %s is malformed", packageName.c_str())); 155 } 156} 157 158#define ENFORCE_UID(uid) { \ 159 binder::Status status = checkUid((uid)); \ 160 if (!status.isOk()) { \ 161 return status; \ 162 } \ 163} 164 165#define CHECK_ARGUMENT_UUID(uuid) { \ 166 binder::Status status = checkArgumentUuid((uuid)); \ 167 if (!status.isOk()) { \ 168 return status; \ 169 } \ 170} 171 172#define CHECK_ARGUMENT_PACKAGE_NAME(packageName) { \ 173 binder::Status status = \ 174 checkArgumentPackageName((packageName)); \ 175 if (!status.isOk()) { \ 176 return status; \ 177 } \ 178} 179 180} // namespace 181 182status_t InstalldNativeService::start() { 183 IPCThreadState::self()->disableBackgroundScheduling(true); 184 status_t ret = BinderService<InstalldNativeService>::publish(); 185 if (ret != android::OK) { 186 return ret; 187 } 188 sp<ProcessState> ps(ProcessState::self()); 189 ps->startThreadPool(); 190 ps->giveThreadPoolName(); 191 return android::OK; 192} 193 194status_t InstalldNativeService::dump(int fd, const Vector<String16> & /* args */) { 195 auto out = std::fstream(StringPrintf("/proc/self/fd/%d", fd)); 196 const binder::Status dump_permission = checkPermission(kDump); 197 if (!dump_permission.isOk()) { 198 out << dump_permission.toString8() << endl; 199 return PERMISSION_DENIED; 200 } 201 std::lock_guard<std::recursive_mutex> lock(mLock); 202 203 out << "installd is happy!" << endl; 204 205 out << endl << "Devices with quota support:" << endl; 206 for (const auto& n : mQuotaDevices) { 207 out << " " << n.first << " = " << n.second << endl; 208 } 209 210 out << endl << "Per-UID cache quotas:" << endl; 211 for (const auto& n : mCacheQuotas) { 212 out << " " << n.first << " = " << n.second << endl; 213 } 214 215 out << endl; 216 out.flush(); 217 218 return NO_ERROR; 219} 220 221/** 222 * Perform restorecon of the given path, but only perform recursive restorecon 223 * if the label of that top-level file actually changed. This can save us 224 * significant time by avoiding no-op traversals of large filesystem trees. 225 */ 226static int restorecon_app_data_lazy(const std::string& path, const std::string& seInfo, uid_t uid, 227 bool existing) { 228 int res = 0; 229 char* before = nullptr; 230 char* after = nullptr; 231 232 // Note that SELINUX_ANDROID_RESTORECON_DATADATA flag is set by 233 // libselinux. Not needed here. 234 235 if (lgetfilecon(path.c_str(), &before) < 0) { 236 PLOG(ERROR) << "Failed before getfilecon for " << path; 237 goto fail; 238 } 239 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 0) < 0) { 240 PLOG(ERROR) << "Failed top-level restorecon for " << path; 241 goto fail; 242 } 243 if (lgetfilecon(path.c_str(), &after) < 0) { 244 PLOG(ERROR) << "Failed after getfilecon for " << path; 245 goto fail; 246 } 247 248 // If the initial top-level restorecon above changed the label, then go 249 // back and restorecon everything recursively 250 if (strcmp(before, after)) { 251 if (existing) { 252 LOG(DEBUG) << "Detected label change from " << before << " to " << after << " at " 253 << path << "; running recursive restorecon"; 254 } 255 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 256 SELINUX_ANDROID_RESTORECON_RECURSE) < 0) { 257 PLOG(ERROR) << "Failed recursive restorecon for " << path; 258 goto fail; 259 } 260 } 261 262 goto done; 263fail: 264 res = -1; 265done: 266 free(before); 267 free(after); 268 return res; 269} 270 271static int restorecon_app_data_lazy(const std::string& parent, const char* name, 272 const std::string& seInfo, uid_t uid, bool existing) { 273 return restorecon_app_data_lazy(StringPrintf("%s/%s", parent.c_str(), name), seInfo, uid, 274 existing); 275} 276 277static int prepare_app_dir(const std::string& path, mode_t target_mode, uid_t uid) { 278 if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, uid) != 0) { 279 PLOG(ERROR) << "Failed to prepare " << path; 280 return -1; 281 } 282 return 0; 283} 284 285binder::Status InstalldNativeService::createAppData(const std::unique_ptr<std::string>& uuid, 286 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 287 const std::string& seInfo, int32_t targetSdkVersion, int64_t* _aidl_return) { 288 ENFORCE_UID(AID_SYSTEM); 289 CHECK_ARGUMENT_UUID(uuid); 290 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 291 std::lock_guard<std::recursive_mutex> lock(mLock); 292 293 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 294 const char* pkgname = packageName.c_str(); 295 296 // Assume invalid inode unless filled in below 297 if (_aidl_return != nullptr) *_aidl_return = -1; 298 299 int32_t uid = multiuser_get_uid(userId, appId); 300 int32_t cacheGid = multiuser_get_cache_gid(userId, appId); 301 mode_t targetMode = targetSdkVersion >= MIN_RESTRICTED_HOME_SDK_VERSION ? 0700 : 0751; 302 303 // If UID doesn't have a specific cache GID, use UID value 304 if (cacheGid == -1) { 305 cacheGid = uid; 306 } 307 308 if (flags & FLAG_STORAGE_CE) { 309 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname); 310 bool existing = (access(path.c_str(), F_OK) == 0); 311 312 if (prepare_app_dir(path, targetMode, uid) || 313 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 314 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 315 return error("Failed to prepare " + path); 316 } 317 318 // Consider restorecon over contents if label changed 319 if (restorecon_app_data_lazy(path, seInfo, uid, existing) || 320 restorecon_app_data_lazy(path, "cache", seInfo, uid, existing) || 321 restorecon_app_data_lazy(path, "code_cache", seInfo, uid, existing)) { 322 return error("Failed to restorecon " + path); 323 } 324 325 // Remember inode numbers of cache directories so that we can clear 326 // contents while CE storage is locked 327 if (write_path_inode(path, "cache", kXattrInodeCache) || 328 write_path_inode(path, "code_cache", kXattrInodeCodeCache)) { 329 return error("Failed to write_path_inode for " + path); 330 } 331 332 // And return the CE inode of the top-level data directory so we can 333 // clear contents while CE storage is locked 334 if ((_aidl_return != nullptr) 335 && get_path_inode(path, reinterpret_cast<ino_t*>(_aidl_return)) != 0) { 336 return error("Failed to get_path_inode for " + path); 337 } 338 } 339 if (flags & FLAG_STORAGE_DE) { 340 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 341 bool existing = (access(path.c_str(), F_OK) == 0); 342 343 if (prepare_app_dir(path, targetMode, uid) || 344 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 345 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 346 return error("Failed to prepare " + path); 347 } 348 349 // Consider restorecon over contents if label changed 350 if (restorecon_app_data_lazy(path, seInfo, uid, existing)) { 351 return error("Failed to restorecon " + path); 352 } 353 354 if (property_get_bool("dalvik.vm.usejitprofiles", false)) { 355 const std::string profile_path = create_data_user_profile_package_path(userId, pkgname); 356 // read-write-execute only for the app user. 357 if (fs_prepare_dir_strict(profile_path.c_str(), 0700, uid, uid) != 0) { 358 return error("Failed to prepare " + profile_path); 359 } 360 std::string profile_file = create_primary_profile(profile_path); 361 // read-write only for the app user. 362 if (fs_prepare_file_strict(profile_file.c_str(), 0600, uid, uid) != 0) { 363 return error("Failed to prepare " + profile_path); 364 } 365 const std::string ref_profile_path = create_data_ref_profile_package_path(pkgname); 366 // dex2oat/profman runs under the shared app gid and it needs to read/write reference 367 // profiles. 368 int shared_app_gid = multiuser_get_shared_gid(0, appId); 369 if ((shared_app_gid != -1) && fs_prepare_dir_strict( 370 ref_profile_path.c_str(), 0700, shared_app_gid, shared_app_gid) != 0) { 371 return error("Failed to prepare " + ref_profile_path); 372 } 373 } 374 } 375 return ok(); 376} 377 378binder::Status InstalldNativeService::migrateAppData(const std::unique_ptr<std::string>& uuid, 379 const std::string& packageName, int32_t userId, int32_t flags) { 380 ENFORCE_UID(AID_SYSTEM); 381 CHECK_ARGUMENT_UUID(uuid); 382 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 383 std::lock_guard<std::recursive_mutex> lock(mLock); 384 385 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 386 const char* pkgname = packageName.c_str(); 387 388 // This method only exists to upgrade system apps that have requested 389 // forceDeviceEncrypted, so their default storage always lives in a 390 // consistent location. This only works on non-FBE devices, since we 391 // never want to risk exposing data on a device with real CE/DE storage. 392 393 auto ce_path = create_data_user_ce_package_path(uuid_, userId, pkgname); 394 auto de_path = create_data_user_de_package_path(uuid_, userId, pkgname); 395 396 // If neither directory is marked as default, assume CE is default 397 if (getxattr(ce_path.c_str(), kXattrDefault, nullptr, 0) == -1 398 && getxattr(de_path.c_str(), kXattrDefault, nullptr, 0) == -1) { 399 if (setxattr(ce_path.c_str(), kXattrDefault, nullptr, 0, 0) != 0) { 400 return error("Failed to mark default storage " + ce_path); 401 } 402 } 403 404 // Migrate default data location if needed 405 auto target = (flags & FLAG_STORAGE_DE) ? de_path : ce_path; 406 auto source = (flags & FLAG_STORAGE_DE) ? ce_path : de_path; 407 408 if (getxattr(target.c_str(), kXattrDefault, nullptr, 0) == -1) { 409 LOG(WARNING) << "Requested default storage " << target 410 << " is not active; migrating from " << source; 411 if (delete_dir_contents_and_dir(target) != 0) { 412 return error("Failed to delete " + target); 413 } 414 if (rename(source.c_str(), target.c_str()) != 0) { 415 return error("Failed to rename " + source + " to " + target); 416 } 417 } 418 419 return ok(); 420} 421 422 423binder::Status InstalldNativeService::clearAppProfiles(const std::string& packageName) { 424 ENFORCE_UID(AID_SYSTEM); 425 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 426 std::lock_guard<std::recursive_mutex> lock(mLock); 427 428 const char* pkgname = packageName.c_str(); 429 binder::Status res = ok(); 430 if (!clear_reference_profile(pkgname)) { 431 res = error("Failed to clear reference profile for " + packageName); 432 } 433 if (!clear_current_profiles(pkgname)) { 434 res = error("Failed to clear current profiles for " + packageName); 435 } 436 return res; 437} 438 439binder::Status InstalldNativeService::clearAppData(const std::unique_ptr<std::string>& uuid, 440 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 441 ENFORCE_UID(AID_SYSTEM); 442 CHECK_ARGUMENT_UUID(uuid); 443 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 444 std::lock_guard<std::recursive_mutex> lock(mLock); 445 446 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 447 const char* pkgname = packageName.c_str(); 448 449 binder::Status res = ok(); 450 if (flags & FLAG_STORAGE_CE) { 451 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 452 if (flags & FLAG_CLEAR_CACHE_ONLY) { 453 path = read_path_inode(path, "cache", kXattrInodeCache); 454 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 455 path = read_path_inode(path, "code_cache", kXattrInodeCodeCache); 456 } 457 if (access(path.c_str(), F_OK) == 0) { 458 if (delete_dir_contents(path) != 0) { 459 res = error("Failed to delete contents of " + path); 460 } 461 } 462 } 463 if (flags & FLAG_STORAGE_DE) { 464 std::string suffix = ""; 465 bool only_cache = false; 466 if (flags & FLAG_CLEAR_CACHE_ONLY) { 467 suffix = CACHE_DIR_POSTFIX; 468 only_cache = true; 469 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 470 suffix = CODE_CACHE_DIR_POSTFIX; 471 only_cache = true; 472 } 473 474 auto path = create_data_user_de_package_path(uuid_, userId, pkgname) + suffix; 475 if (access(path.c_str(), F_OK) == 0) { 476 if (delete_dir_contents(path) != 0) { 477 res = error("Failed to delete contents of " + path); 478 } 479 } 480 if (!only_cache) { 481 if (!clear_current_profile(pkgname, userId)) { 482 res = error("Failed to clear current profile for " + packageName); 483 } 484 } 485 } 486 return res; 487} 488 489static int destroy_app_reference_profile(const char *pkgname) { 490 return delete_dir_contents_and_dir( 491 create_data_ref_profile_package_path(pkgname), 492 /*ignore_if_missing*/ true); 493} 494 495static int destroy_app_current_profiles(const char *pkgname, userid_t userid) { 496 return delete_dir_contents_and_dir( 497 create_data_user_profile_package_path(userid, pkgname), 498 /*ignore_if_missing*/ true); 499} 500 501binder::Status InstalldNativeService::destroyAppProfiles(const std::string& packageName) { 502 ENFORCE_UID(AID_SYSTEM); 503 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 504 std::lock_guard<std::recursive_mutex> lock(mLock); 505 506 const char* pkgname = packageName.c_str(); 507 binder::Status res = ok(); 508 std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr); 509 for (auto user : users) { 510 if (destroy_app_current_profiles(pkgname, user) != 0) { 511 res = error("Failed to destroy current profiles for " + packageName); 512 } 513 } 514 if (destroy_app_reference_profile(pkgname) != 0) { 515 res = error("Failed to destroy reference profile for " + packageName); 516 } 517 return res; 518} 519 520binder::Status InstalldNativeService::destroyAppData(const std::unique_ptr<std::string>& uuid, 521 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 522 ENFORCE_UID(AID_SYSTEM); 523 CHECK_ARGUMENT_UUID(uuid); 524 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 525 std::lock_guard<std::recursive_mutex> lock(mLock); 526 527 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 528 const char* pkgname = packageName.c_str(); 529 530 binder::Status res = ok(); 531 if (flags & FLAG_STORAGE_CE) { 532 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 533 if (delete_dir_contents_and_dir(path) != 0) { 534 res = error("Failed to delete " + path); 535 } 536 } 537 if (flags & FLAG_STORAGE_DE) { 538 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 539 if (delete_dir_contents_and_dir(path) != 0) { 540 res = error("Failed to delete " + path); 541 } 542 destroy_app_current_profiles(pkgname, userId); 543 // TODO(calin): If the package is still installed by other users it's probably 544 // beneficial to keep the reference profile around. 545 // Verify if it's ok to do that. 546 destroy_app_reference_profile(pkgname); 547 } 548 return res; 549} 550 551binder::Status InstalldNativeService::moveCompleteApp(const std::unique_ptr<std::string>& fromUuid, 552 const std::unique_ptr<std::string>& toUuid, const std::string& packageName, 553 const std::string& dataAppName, int32_t appId, const std::string& seInfo, 554 int32_t targetSdkVersion) { 555 ENFORCE_UID(AID_SYSTEM); 556 CHECK_ARGUMENT_UUID(fromUuid); 557 CHECK_ARGUMENT_UUID(toUuid); 558 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 559 std::lock_guard<std::recursive_mutex> lock(mLock); 560 561 const char* from_uuid = fromUuid ? fromUuid->c_str() : nullptr; 562 const char* to_uuid = toUuid ? toUuid->c_str() : nullptr; 563 const char* package_name = packageName.c_str(); 564 const char* data_app_name = dataAppName.c_str(); 565 566 binder::Status res = ok(); 567 std::vector<userid_t> users = get_known_users(from_uuid); 568 569 // Copy app 570 { 571 auto from = create_data_app_package_path(from_uuid, data_app_name); 572 auto to = create_data_app_package_path(to_uuid, data_app_name); 573 auto to_parent = create_data_app_path(to_uuid); 574 575 char *argv[] = { 576 (char*) kCpPath, 577 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 578 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 579 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 580 (char*) "-P", /* Do not follow symlinks [default] */ 581 (char*) "-d", /* don't dereference symlinks */ 582 (char*) from.c_str(), 583 (char*) to_parent.c_str() 584 }; 585 586 LOG(DEBUG) << "Copying " << from << " to " << to; 587 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 588 if (rc != 0) { 589 res = error(rc, "Failed copying " + from + " to " + to); 590 goto fail; 591 } 592 593 if (selinux_android_restorecon(to.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) { 594 res = error("Failed to restorecon " + to); 595 goto fail; 596 } 597 } 598 599 // Copy private data for all known users 600 for (auto user : users) { 601 602 // Data source may not exist for all users; that's okay 603 auto from_ce = create_data_user_ce_package_path(from_uuid, user, package_name); 604 if (access(from_ce.c_str(), F_OK) != 0) { 605 LOG(INFO) << "Missing source " << from_ce; 606 continue; 607 } 608 609 if (!createAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, appId, 610 seInfo, targetSdkVersion, nullptr).isOk()) { 611 res = error("Failed to create package target"); 612 goto fail; 613 } 614 615 char *argv[] = { 616 (char*) kCpPath, 617 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 618 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 619 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 620 (char*) "-P", /* Do not follow symlinks [default] */ 621 (char*) "-d", /* don't dereference symlinks */ 622 nullptr, 623 nullptr 624 }; 625 626 { 627 auto from = create_data_user_de_package_path(from_uuid, user, package_name); 628 auto to = create_data_user_de_path(to_uuid, user); 629 argv[6] = (char*) from.c_str(); 630 argv[7] = (char*) to.c_str(); 631 632 LOG(DEBUG) << "Copying " << from << " to " << to; 633 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 634 if (rc != 0) { 635 res = error(rc, "Failed copying " + from + " to " + to); 636 goto fail; 637 } 638 } 639 { 640 auto from = create_data_user_ce_package_path(from_uuid, user, package_name); 641 auto to = create_data_user_ce_path(to_uuid, user); 642 argv[6] = (char*) from.c_str(); 643 argv[7] = (char*) to.c_str(); 644 645 LOG(DEBUG) << "Copying " << from << " to " << to; 646 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 647 if (rc != 0) { 648 res = error(rc, "Failed copying " + from + " to " + to); 649 goto fail; 650 } 651 } 652 653 if (!restoreconAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, 654 appId, seInfo).isOk()) { 655 res = error("Failed to restorecon"); 656 goto fail; 657 } 658 } 659 660 // We let the framework scan the new location and persist that before 661 // deleting the data in the old location; this ordering ensures that 662 // we can recover from things like battery pulls. 663 return ok(); 664 665fail: 666 // Nuke everything we might have already copied 667 { 668 auto to = create_data_app_package_path(to_uuid, data_app_name); 669 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 670 LOG(WARNING) << "Failed to rollback " << to; 671 } 672 } 673 for (auto user : users) { 674 { 675 auto to = create_data_user_de_package_path(to_uuid, user, package_name); 676 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 677 LOG(WARNING) << "Failed to rollback " << to; 678 } 679 } 680 { 681 auto to = create_data_user_ce_package_path(to_uuid, user, package_name); 682 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 683 LOG(WARNING) << "Failed to rollback " << to; 684 } 685 } 686 } 687 return res; 688} 689 690binder::Status InstalldNativeService::createUserData(const std::unique_ptr<std::string>& uuid, 691 int32_t userId, int32_t userSerial ATTRIBUTE_UNUSED, int32_t flags) { 692 ENFORCE_UID(AID_SYSTEM); 693 CHECK_ARGUMENT_UUID(uuid); 694 std::lock_guard<std::recursive_mutex> lock(mLock); 695 696 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 697 if (flags & FLAG_STORAGE_DE) { 698 if (uuid_ == nullptr) { 699 if (ensure_config_user_dirs(userId) != 0) { 700 return error(StringPrintf("Failed to ensure dirs for %d", userId)); 701 } 702 } 703 } 704 return ok(); 705} 706 707binder::Status InstalldNativeService::destroyUserData(const std::unique_ptr<std::string>& uuid, 708 int32_t userId, int32_t flags) { 709 ENFORCE_UID(AID_SYSTEM); 710 CHECK_ARGUMENT_UUID(uuid); 711 std::lock_guard<std::recursive_mutex> lock(mLock); 712 713 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 714 binder::Status res = ok(); 715 if (flags & FLAG_STORAGE_DE) { 716 auto path = create_data_user_de_path(uuid_, userId); 717 if (delete_dir_contents_and_dir(path, true) != 0) { 718 res = error("Failed to delete " + path); 719 } 720 if (uuid_ == nullptr) { 721 path = create_data_misc_legacy_path(userId); 722 if (delete_dir_contents_and_dir(path, true) != 0) { 723 res = error("Failed to delete " + path); 724 } 725 path = create_data_user_profile_path(userId); 726 if (delete_dir_contents_and_dir(path, true) != 0) { 727 res = error("Failed to delete " + path); 728 } 729 } 730 } 731 if (flags & FLAG_STORAGE_CE) { 732 auto path = create_data_user_ce_path(uuid_, userId); 733 if (delete_dir_contents_and_dir(path, true) != 0) { 734 res = error("Failed to delete " + path); 735 } 736 path = create_data_media_path(uuid_, userId); 737 if (delete_dir_contents_and_dir(path, true) != 0) { 738 res = error("Failed to delete " + path); 739 } 740 } 741 return res; 742} 743 744/* Try to ensure free_size bytes of storage are available. 745 * Returns 0 on success. 746 * This is rather simple-minded because doing a full LRU would 747 * be potentially memory-intensive, and without atime it would 748 * also require that apps constantly modify file metadata even 749 * when just reading from the cache, which is pretty awful. 750 */ 751binder::Status InstalldNativeService::freeCache(const std::unique_ptr<std::string>& uuid, 752 int64_t freeStorageSize, int32_t flags) { 753 ENFORCE_UID(AID_SYSTEM); 754 CHECK_ARGUMENT_UUID(uuid); 755 std::lock_guard<std::recursive_mutex> lock(mLock); 756 757 // TODO: remove this once framework is more robust 758 invalidateMounts(); 759 760 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 761 auto data_path = create_data_path(uuid_); 762 auto device = findQuotaDeviceForUuid(uuid); 763 auto noop = (flags & FLAG_FREE_CACHE_NOOP); 764 765 int64_t free = data_disk_free(data_path); 766 int64_t needed = freeStorageSize - free; 767 if (free < 0) { 768 return error("Failed to determine free space for " + data_path); 769 } else if (free >= freeStorageSize) { 770 return ok(); 771 } 772 773 LOG(DEBUG) << "Found " << data_path << " with " << free << " free; caller requested " 774 << freeStorageSize; 775 776 if (flags & FLAG_FREE_CACHE_V2) { 777 // This new cache strategy fairly removes files from UIDs by deleting 778 // files from the UIDs which are most over their allocated quota 779 780 // 1. Create trackers for every known UID 781 ATRACE_BEGIN("create"); 782 std::unordered_map<uid_t, std::shared_ptr<CacheTracker>> trackers; 783 for (auto user : get_known_users(uuid_)) { 784 FTS *fts; 785 FTSENT *p; 786 char *argv[] = { 787 (char*) create_data_user_ce_path(uuid_, user).c_str(), 788 (char*) create_data_user_de_path(uuid_, user).c_str(), 789 nullptr 790 }; 791 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 792 return error("Failed to fts_open"); 793 } 794 while ((p = fts_read(fts)) != NULL) { 795 if (p->fts_info == FTS_D && p->fts_level == 1) { 796 uid_t uid = p->fts_statp->st_uid; 797 auto search = trackers.find(uid); 798 if (search != trackers.end()) { 799 search->second->addDataPath(p->fts_path); 800 } else { 801 auto tracker = std::shared_ptr<CacheTracker>(new CacheTracker( 802 multiuser_get_user_id(uid), multiuser_get_app_id(uid), device)); 803 tracker->addDataPath(p->fts_path); 804 tracker->cacheQuota = mCacheQuotas[uid]; 805 if (tracker->cacheQuota == 0) { 806 LOG(WARNING) << "UID " << uid << " has no cache quota; assuming 64MB"; 807 tracker->cacheQuota = 67108864; 808 } 809 trackers[uid] = tracker; 810 } 811 fts_set(fts, p, FTS_SKIP); 812 } 813 } 814 fts_close(fts); 815 } 816 ATRACE_END(); 817 818 // 2. Populate tracker stats and insert into priority queue 819 ATRACE_BEGIN("populate"); 820 auto cmp = [](std::shared_ptr<CacheTracker> left, std::shared_ptr<CacheTracker> right) { 821 return (left->getCacheRatio() < right->getCacheRatio()); 822 }; 823 std::priority_queue<std::shared_ptr<CacheTracker>, 824 std::vector<std::shared_ptr<CacheTracker>>, decltype(cmp)> queue(cmp); 825 for (const auto& it : trackers) { 826 it.second->loadStats(); 827 queue.push(it.second); 828 } 829 ATRACE_END(); 830 831 // 3. Bounce across the queue, freeing items from whichever tracker is 832 // the most over their assigned quota 833 ATRACE_BEGIN("bounce"); 834 std::shared_ptr<CacheTracker> active; 835 while (active || !queue.empty()) { 836 // Find the best tracker to work with; this might involve swapping 837 // if the active tracker is no longer the most over quota 838 bool nextBetter = active && !queue.empty() 839 && active->getCacheRatio() < queue.top()->getCacheRatio(); 840 if (!active || nextBetter) { 841 if (active) { 842 // Current tracker still has items, so we'll consider it 843 // again later once it bubbles up to surface 844 queue.push(active); 845 } 846 active = queue.top(); queue.pop(); 847 active->ensureItems(); 848 continue; 849 } 850 851 // If no items remain, go find another tracker 852 if (active->items.empty()) { 853 active = nullptr; 854 continue; 855 } else { 856 auto item = active->items.back(); 857 active->items.pop_back(); 858 859 LOG(DEBUG) << "Purging " << item->toString() << " from " << active->toString(); 860 if (!noop) { 861 item->purge(); 862 } 863 active->cacheUsed -= item->size; 864 needed -= item->size; 865 } 866 867 // Verify that we're actually done before bailing, since sneaky 868 // apps might be using hardlinks 869 if (needed <= 0) { 870 free = data_disk_free(data_path); 871 needed = freeStorageSize - free; 872 if (needed <= 0) { 873 break; 874 } else { 875 LOG(WARNING) << "Expected to be done but still need " << needed; 876 } 877 } 878 } 879 ATRACE_END(); 880 881 } else { 882 ATRACE_BEGIN("start"); 883 cache_t* cache = start_cache_collection(); 884 ATRACE_END(); 885 886 ATRACE_BEGIN("add"); 887 for (auto user : get_known_users(uuid_)) { 888 add_cache_files(cache, create_data_user_ce_path(uuid_, user)); 889 add_cache_files(cache, create_data_user_de_path(uuid_, user)); 890 add_cache_files(cache, 891 StringPrintf("%s/Android/data", create_data_media_path(uuid_, user).c_str())); 892 } 893 // Add files from /data/preloads/file_cache 894 if (uuid == nullptr) { 895 add_preloads_file_cache(cache, uuid_); 896 } 897 ATRACE_END(); 898 899 ATRACE_BEGIN("clear"); 900 clear_cache_files(data_path, cache, freeStorageSize); 901 ATRACE_END(); 902 903 ATRACE_BEGIN("finish"); 904 finish_cache_collection(cache); 905 ATRACE_END(); 906 } 907 908 free = data_disk_free(data_path); 909 if (free >= freeStorageSize) { 910 return ok(); 911 } else { 912 return error(StringPrintf("Failed to free up %" PRId64 " on %s; final free space %" PRId64, 913 freeStorageSize, data_path.c_str(), free)); 914 } 915} 916 917binder::Status InstalldNativeService::rmdex(const std::string& codePath, 918 const std::string& instructionSet) { 919 ENFORCE_UID(AID_SYSTEM); 920 std::lock_guard<std::recursive_mutex> lock(mLock); 921 922 char dex_path[PKG_PATH_MAX]; 923 924 const char* path = codePath.c_str(); 925 const char* instruction_set = instructionSet.c_str(); 926 927 if (validate_apk_path(path) && validate_system_app_path(path)) { 928 return error("Invalid path " + codePath); 929 } 930 931 if (!create_cache_path(dex_path, path, instruction_set)) { 932 return error("Failed to create cache path for " + codePath); 933 } 934 935 ALOGV("unlink %s\n", dex_path); 936 if (unlink(dex_path) < 0) { 937 return error(StringPrintf("Failed to unlink %s", dex_path)); 938 } else { 939 return ok(); 940 } 941} 942 943struct stats { 944 int64_t codeSize; 945 int64_t dataSize; 946 int64_t cacheSize; 947}; 948 949#if MEASURE_DEBUG 950static std::string toString(std::vector<int64_t> values) { 951 std::stringstream res; 952 res << "["; 953 for (size_t i = 0; i < values.size(); i++) { 954 res << values[i]; 955 if (i < values.size() - 1) { 956 res << ","; 957 } 958 } 959 res << "]"; 960 return res.str(); 961} 962#endif 963 964static void collectQuotaStats(const std::string& device, int32_t userId, 965 int32_t appId, struct stats* stats, struct stats* extStats) { 966 if (device.empty()) return; 967 968 struct dqblk dq; 969 970 uid_t uid = multiuser_get_uid(userId, appId); 971 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 972 reinterpret_cast<char*>(&dq)) != 0) { 973 if (errno != ESRCH) { 974 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 975 } 976 } else { 977#if MEASURE_DEBUG 978 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 979#endif 980 stats->dataSize += dq.dqb_curspace; 981 } 982 983 int cacheGid = multiuser_get_cache_gid(userId, appId); 984 if (cacheGid != -1) { 985 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), cacheGid, 986 reinterpret_cast<char*>(&dq)) != 0) { 987 if (errno != ESRCH) { 988 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << cacheGid; 989 } 990 } else { 991#if MEASURE_DEBUG 992 LOG(DEBUG) << "quotactl() for GID " << cacheGid << " " << dq.dqb_curspace; 993#endif 994 stats->cacheSize += dq.dqb_curspace; 995 } 996 } 997 998 int extGid = multiuser_get_ext_gid(userId, appId); 999 if (extGid != -1) { 1000 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), extGid, 1001 reinterpret_cast<char*>(&dq)) != 0) { 1002 if (errno != ESRCH) { 1003 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << extGid; 1004 } 1005 } else { 1006#if MEASURE_DEBUG 1007 LOG(DEBUG) << "quotactl() for GID " << extGid << " " << dq.dqb_curspace; 1008#endif 1009 extStats->dataSize += dq.dqb_curspace; 1010 } 1011 } 1012 1013 int sharedGid = multiuser_get_shared_gid(userId, appId); 1014 if (sharedGid != -1) { 1015 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), sharedGid, 1016 reinterpret_cast<char*>(&dq)) != 0) { 1017 if (errno != ESRCH) { 1018 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << sharedGid; 1019 } 1020 } else { 1021#if MEASURE_DEBUG 1022 LOG(DEBUG) << "quotactl() for GID " << sharedGid << " " << dq.dqb_curspace; 1023#endif 1024 stats->codeSize += dq.dqb_curspace; 1025 } 1026 } 1027} 1028 1029static void collectManualStats(const std::string& path, struct stats* stats) { 1030 DIR *d; 1031 int dfd; 1032 struct dirent *de; 1033 struct stat s; 1034 1035 d = opendir(path.c_str()); 1036 if (d == nullptr) { 1037 if (errno != ENOENT) { 1038 PLOG(WARNING) << "Failed to open " << path; 1039 } 1040 return; 1041 } 1042 dfd = dirfd(d); 1043 while ((de = readdir(d))) { 1044 const char *name = de->d_name; 1045 1046 int64_t size = 0; 1047 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 1048 size = s.st_blocks * 512; 1049 } 1050 1051 if (de->d_type == DT_DIR) { 1052 if (!strcmp(name, ".")) { 1053 // Don't recurse, but still count node size 1054 } else if (!strcmp(name, "..")) { 1055 // Don't recurse or count node size 1056 continue; 1057 } else { 1058 // Measure all children nodes 1059 size = 0; 1060 calculate_tree_size(StringPrintf("%s/%s", path.c_str(), name), &size); 1061 } 1062 1063 if (!strcmp(name, "cache") || !strcmp(name, "code_cache")) { 1064 stats->cacheSize += size; 1065 } 1066 } 1067 1068 // Legacy symlink isn't owned by app 1069 if (de->d_type == DT_LNK && !strcmp(name, "lib")) { 1070 continue; 1071 } 1072 1073 // Everything found inside is considered data 1074 stats->dataSize += size; 1075 } 1076 closedir(d); 1077} 1078 1079static void collectManualStatsForUser(const std::string& path, struct stats* stats, 1080 bool exclude_apps = false) { 1081 DIR *d; 1082 int dfd; 1083 struct dirent *de; 1084 struct stat s; 1085 1086 d = opendir(path.c_str()); 1087 if (d == nullptr) { 1088 if (errno != ENOENT) { 1089 PLOG(WARNING) << "Failed to open " << path; 1090 } 1091 return; 1092 } 1093 dfd = dirfd(d); 1094 while ((de = readdir(d))) { 1095 if (de->d_type == DT_DIR) { 1096 const char *name = de->d_name; 1097 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) != 0) { 1098 continue; 1099 } 1100 if (!strcmp(name, ".") || !strcmp(name, "..")) { 1101 continue; 1102 } else if (exclude_apps && (s.st_uid >= AID_APP_START && s.st_uid <= AID_APP_END)) { 1103 continue; 1104 } else { 1105 collectManualStats(StringPrintf("%s/%s", path.c_str(), name), stats); 1106 } 1107 } 1108 } 1109 closedir(d); 1110} 1111 1112static void collectManualExternalStatsForUser(const std::string& path, struct stats* stats) { 1113 FTS *fts; 1114 FTSENT *p; 1115 char *argv[] = { (char*) path.c_str(), nullptr }; 1116 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 1117 PLOG(ERROR) << "Failed to fts_open " << path; 1118 return; 1119 } 1120 while ((p = fts_read(fts)) != NULL) { 1121 p->fts_number = p->fts_parent->fts_number; 1122 switch (p->fts_info) { 1123 case FTS_D: 1124 if (p->fts_level == 4 1125 && !strcmp(p->fts_name, "cache") 1126 && !strcmp(p->fts_parent->fts_parent->fts_name, "data") 1127 && !strcmp(p->fts_parent->fts_parent->fts_parent->fts_name, "Android")) { 1128 p->fts_number = 1; 1129 } 1130 // Fall through to count the directory 1131 case FTS_DEFAULT: 1132 case FTS_F: 1133 case FTS_SL: 1134 case FTS_SLNONE: 1135 int64_t size = (p->fts_statp->st_blocks * 512); 1136 if (p->fts_number == 1) { 1137 stats->cacheSize += size; 1138 } 1139 stats->dataSize += size; 1140 break; 1141 } 1142 } 1143 fts_close(fts); 1144} 1145 1146binder::Status InstalldNativeService::getAppSize(const std::unique_ptr<std::string>& uuid, 1147 const std::vector<std::string>& packageNames, int32_t userId, int32_t flags, 1148 int32_t appId, const std::vector<int64_t>& ceDataInodes, 1149 const std::vector<std::string>& codePaths, std::vector<int64_t>* _aidl_return) { 1150 ENFORCE_UID(AID_SYSTEM); 1151 CHECK_ARGUMENT_UUID(uuid); 1152 for (auto packageName : packageNames) { 1153 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1154 } 1155 std::lock_guard<std::recursive_mutex> lock(mLock); 1156 1157 // When modifying this logic, always verify using tests: 1158 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetAppSize 1159 1160#if MEASURE_DEBUG 1161 LOG(INFO) << "Measuring user " << userId << " app " << appId; 1162#endif 1163 1164 // Here's a summary of the common storage locations across the platform, 1165 // and how they're each tagged: 1166 // 1167 // /data/app/com.example UID system 1168 // /data/app/com.example/oat UID system 1169 // /data/user/0/com.example UID u0_a10 GID u0_a10 1170 // /data/user/0/com.example/cache UID u0_a10 GID u0_a10_cache 1171 // /data/media/0/foo.txt UID u0_media_rw 1172 // /data/media/0/bar.jpg UID u0_media_rw GID u0_media_image 1173 // /data/media/0/Android/data/com.example UID u0_media_rw GID u0_a10_ext 1174 // /data/media/0/Android/data/com.example/cache UID u0_media_rw GID u0_a10_ext_cache 1175 // /data/media/obb/com.example UID system 1176 1177 struct stats stats; 1178 struct stats extStats; 1179 memset(&stats, 0, sizeof(stats)); 1180 memset(&extStats, 0, sizeof(extStats)); 1181 1182 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1183 1184 auto device = findQuotaDeviceForUuid(uuid); 1185 if (device.empty()) { 1186 flags &= ~FLAG_USE_QUOTA; 1187 } 1188 1189 ATRACE_BEGIN("obb"); 1190 for (auto packageName : packageNames) { 1191 auto obbCodePath = create_data_media_obb_path(uuid_, packageName.c_str()); 1192 calculate_tree_size(obbCodePath, &extStats.codeSize); 1193 } 1194 ATRACE_END(); 1195 1196 if (flags & FLAG_USE_QUOTA && appId >= AID_APP_START) { 1197 ATRACE_BEGIN("code"); 1198 for (auto codePath : codePaths) { 1199 calculate_tree_size(codePath, &stats.codeSize, -1, 1200 multiuser_get_shared_gid(userId, appId)); 1201 } 1202 ATRACE_END(); 1203 1204 ATRACE_BEGIN("quota"); 1205 collectQuotaStats(device, userId, appId, &stats, &extStats); 1206 ATRACE_END(); 1207 1208 } else { 1209 ATRACE_BEGIN("code"); 1210 for (auto codePath : codePaths) { 1211 calculate_tree_size(codePath, &stats.codeSize); 1212 } 1213 ATRACE_END(); 1214 1215 for (size_t i = 0; i < packageNames.size(); i++) { 1216 const char* pkgname = packageNames[i].c_str(); 1217 1218 ATRACE_BEGIN("data"); 1219 auto cePath = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInodes[i]); 1220 collectManualStats(cePath, &stats); 1221 auto dePath = create_data_user_de_package_path(uuid_, userId, pkgname); 1222 collectManualStats(dePath, &stats); 1223 ATRACE_END(); 1224 1225 ATRACE_BEGIN("profiles"); 1226 auto userProfilePath = create_data_user_profile_package_path(userId, pkgname); 1227 calculate_tree_size(userProfilePath, &stats.dataSize); 1228 auto refProfilePath = create_data_ref_profile_package_path(pkgname); 1229 calculate_tree_size(refProfilePath, &stats.codeSize); 1230 ATRACE_END(); 1231 1232 ATRACE_BEGIN("external"); 1233 auto extPath = create_data_media_package_path(uuid_, userId, "data", pkgname); 1234 collectManualStats(extPath, &extStats); 1235 auto mediaPath = create_data_media_package_path(uuid_, userId, "media", pkgname); 1236 calculate_tree_size(mediaPath, &extStats.dataSize); 1237 ATRACE_END(); 1238 } 1239 1240 ATRACE_BEGIN("dalvik"); 1241 int32_t sharedGid = multiuser_get_shared_gid(userId, appId); 1242 if (sharedGid != -1) { 1243 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1244 sharedGid, -1); 1245 } 1246 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize, 1247 multiuser_get_uid(userId, appId), -1); 1248 ATRACE_END(); 1249 } 1250 1251 std::vector<int64_t> ret; 1252 ret.push_back(stats.codeSize); 1253 ret.push_back(stats.dataSize); 1254 ret.push_back(stats.cacheSize); 1255 ret.push_back(extStats.codeSize); 1256 ret.push_back(extStats.dataSize); 1257 ret.push_back(extStats.cacheSize); 1258#if MEASURE_DEBUG 1259 LOG(DEBUG) << "Final result " << toString(ret); 1260#endif 1261 *_aidl_return = ret; 1262 return ok(); 1263} 1264 1265binder::Status InstalldNativeService::getUserSize(const std::unique_ptr<std::string>& uuid, 1266 int32_t userId, int32_t flags, const std::vector<int32_t>& appIds, 1267 std::vector<int64_t>* _aidl_return) { 1268 ENFORCE_UID(AID_SYSTEM); 1269 CHECK_ARGUMENT_UUID(uuid); 1270 std::lock_guard<std::recursive_mutex> lock(mLock); 1271 1272 // When modifying this logic, always verify using tests: 1273 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetUserSize 1274 1275#if MEASURE_DEBUG 1276 LOG(INFO) << "Measuring user " << userId; 1277#endif 1278 1279 struct stats stats; 1280 struct stats extStats; 1281 memset(&stats, 0, sizeof(stats)); 1282 memset(&extStats, 0, sizeof(extStats)); 1283 1284 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1285 1286 auto device = findQuotaDeviceForUuid(uuid); 1287 if (device.empty()) { 1288 flags &= ~FLAG_USE_QUOTA; 1289 } 1290 1291 if (flags & FLAG_USE_QUOTA) { 1292 struct dqblk dq; 1293 1294 ATRACE_BEGIN("obb"); 1295 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), AID_MEDIA_OBB, 1296 reinterpret_cast<char*>(&dq)) != 0) { 1297 if (errno != ESRCH) { 1298 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << AID_MEDIA_OBB; 1299 } 1300 } else { 1301#if MEASURE_DEBUG 1302 LOG(DEBUG) << "quotactl() for GID " << AID_MEDIA_OBB << " " << dq.dqb_curspace; 1303#endif 1304 extStats.codeSize += dq.dqb_curspace; 1305 } 1306 ATRACE_END(); 1307 1308 ATRACE_BEGIN("code"); 1309 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize, -1, -1, true); 1310 ATRACE_END(); 1311 1312 ATRACE_BEGIN("data"); 1313 auto cePath = create_data_user_ce_path(uuid_, userId); 1314 collectManualStatsForUser(cePath, &stats, true); 1315 auto dePath = create_data_user_de_path(uuid_, userId); 1316 collectManualStatsForUser(dePath, &stats, true); 1317 ATRACE_END(); 1318 1319 ATRACE_BEGIN("profile"); 1320 auto userProfilePath = create_data_user_profile_path(userId); 1321 calculate_tree_size(userProfilePath, &stats.dataSize, -1, -1, true); 1322 auto refProfilePath = create_data_ref_profile_path(); 1323 calculate_tree_size(refProfilePath, &stats.codeSize, -1, -1, true); 1324 ATRACE_END(); 1325 1326 ATRACE_BEGIN("external"); 1327 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1328 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1329 reinterpret_cast<char*>(&dq)) != 0) { 1330 if (errno != ESRCH) { 1331 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1332 } 1333 } else { 1334#if MEASURE_DEBUG 1335 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1336#endif 1337 extStats.dataSize += dq.dqb_curspace; 1338 } 1339 ATRACE_END(); 1340 1341 ATRACE_BEGIN("dalvik"); 1342 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1343 -1, -1, true); 1344 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize, 1345 -1, -1, true); 1346 ATRACE_END(); 1347 1348 ATRACE_BEGIN("quota"); 1349 for (auto appId : appIds) { 1350 if (appId >= AID_APP_START) { 1351 collectQuotaStats(device, userId, appId, &stats, &extStats); 1352#if MEASURE_DEBUG 1353 // Sleep to make sure we don't lose logs 1354 usleep(1); 1355#endif 1356 } 1357 } 1358 ATRACE_END(); 1359 } else { 1360 ATRACE_BEGIN("obb"); 1361 auto obbPath = create_data_path(uuid_) + "/media/obb"; 1362 calculate_tree_size(obbPath, &extStats.codeSize); 1363 ATRACE_END(); 1364 1365 ATRACE_BEGIN("code"); 1366 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize); 1367 ATRACE_END(); 1368 1369 ATRACE_BEGIN("data"); 1370 auto cePath = create_data_user_ce_path(uuid_, userId); 1371 collectManualStatsForUser(cePath, &stats); 1372 auto dePath = create_data_user_de_path(uuid_, userId); 1373 collectManualStatsForUser(dePath, &stats); 1374 ATRACE_END(); 1375 1376 ATRACE_BEGIN("profile"); 1377 auto userProfilePath = create_data_user_profile_path(userId); 1378 calculate_tree_size(userProfilePath, &stats.dataSize); 1379 auto refProfilePath = create_data_ref_profile_path(); 1380 calculate_tree_size(refProfilePath, &stats.codeSize); 1381 ATRACE_END(); 1382 1383 ATRACE_BEGIN("external"); 1384 auto dataMediaPath = create_data_media_path(uuid_, userId); 1385 collectManualExternalStatsForUser(dataMediaPath, &extStats); 1386#if MEASURE_DEBUG 1387 LOG(DEBUG) << "Measured external data " << extStats.dataSize << " cache " 1388 << extStats.cacheSize; 1389#endif 1390 ATRACE_END(); 1391 1392 ATRACE_BEGIN("dalvik"); 1393 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize); 1394 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize); 1395 ATRACE_END(); 1396 } 1397 1398 std::vector<int64_t> ret; 1399 ret.push_back(stats.codeSize); 1400 ret.push_back(stats.dataSize); 1401 ret.push_back(stats.cacheSize); 1402 ret.push_back(extStats.codeSize); 1403 ret.push_back(extStats.dataSize); 1404 ret.push_back(extStats.cacheSize); 1405#if MEASURE_DEBUG 1406 LOG(DEBUG) << "Final result " << toString(ret); 1407#endif 1408 *_aidl_return = ret; 1409 return ok(); 1410} 1411 1412binder::Status InstalldNativeService::getExternalSize(const std::unique_ptr<std::string>& uuid, 1413 int32_t userId, int32_t flags, std::vector<int64_t>* _aidl_return) { 1414 ENFORCE_UID(AID_SYSTEM); 1415 CHECK_ARGUMENT_UUID(uuid); 1416 std::lock_guard<std::recursive_mutex> lock(mLock); 1417 1418 // When modifying this logic, always verify using tests: 1419 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetExternalSize 1420 1421#if MEASURE_DEBUG 1422 LOG(INFO) << "Measuring external " << userId; 1423#endif 1424 1425 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1426 1427 int64_t totalSize = 0; 1428 int64_t audioSize = 0; 1429 int64_t videoSize = 0; 1430 int64_t imageSize = 0; 1431 1432 auto device = findQuotaDeviceForUuid(uuid); 1433 if (device.empty()) { 1434 flags &= ~FLAG_USE_QUOTA; 1435 } 1436 1437 if (flags & FLAG_USE_QUOTA) { 1438 struct dqblk dq; 1439 1440 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1441 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1442 reinterpret_cast<char*>(&dq)) != 0) { 1443 if (errno != ESRCH) { 1444 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1445 } 1446 } else { 1447#if MEASURE_DEBUG 1448 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1449#endif 1450 totalSize = dq.dqb_curspace; 1451 } 1452 1453 gid_t audioGid = multiuser_get_uid(userId, AID_MEDIA_AUDIO); 1454 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), audioGid, 1455 reinterpret_cast<char*>(&dq)) == 0) { 1456#if MEASURE_DEBUG 1457 LOG(DEBUG) << "quotactl() for GID " << audioGid << " " << dq.dqb_curspace; 1458#endif 1459 audioSize = dq.dqb_curspace; 1460 } 1461 gid_t videoGid = multiuser_get_uid(userId, AID_MEDIA_VIDEO); 1462 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), videoGid, 1463 reinterpret_cast<char*>(&dq)) == 0) { 1464#if MEASURE_DEBUG 1465 LOG(DEBUG) << "quotactl() for GID " << videoGid << " " << dq.dqb_curspace; 1466#endif 1467 videoSize = dq.dqb_curspace; 1468 } 1469 gid_t imageGid = multiuser_get_uid(userId, AID_MEDIA_IMAGE); 1470 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), imageGid, 1471 reinterpret_cast<char*>(&dq)) == 0) { 1472#if MEASURE_DEBUG 1473 LOG(DEBUG) << "quotactl() for GID " << imageGid << " " << dq.dqb_curspace; 1474#endif 1475 imageSize = dq.dqb_curspace; 1476 } 1477 } else { 1478 FTS *fts; 1479 FTSENT *p; 1480 auto path = create_data_media_path(uuid_, userId); 1481 char *argv[] = { (char*) path.c_str(), nullptr }; 1482 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 1483 return error("Failed to fts_open " + path); 1484 } 1485 while ((p = fts_read(fts)) != NULL) { 1486 char* ext; 1487 int64_t size = (p->fts_statp->st_blocks * 512); 1488 switch (p->fts_info) { 1489 case FTS_F: 1490 // Only categorize files not belonging to apps 1491 if (p->fts_statp->st_gid < AID_APP_START) { 1492 ext = strrchr(p->fts_name, '.'); 1493 if (ext != nullptr) { 1494 switch (MatchExtension(++ext)) { 1495 case AID_MEDIA_AUDIO: audioSize += size; break; 1496 case AID_MEDIA_VIDEO: videoSize += size; break; 1497 case AID_MEDIA_IMAGE: imageSize += size; break; 1498 } 1499 } 1500 } 1501 // Fall through to always count against total 1502 case FTS_D: 1503 case FTS_DEFAULT: 1504 case FTS_SL: 1505 case FTS_SLNONE: 1506 totalSize += size; 1507 break; 1508 } 1509 } 1510 fts_close(fts); 1511 } 1512 1513 std::vector<int64_t> ret; 1514 ret.push_back(totalSize); 1515 ret.push_back(audioSize); 1516 ret.push_back(videoSize); 1517 ret.push_back(imageSize); 1518#if MEASURE_DEBUG 1519 LOG(DEBUG) << "Final result " << toString(ret); 1520#endif 1521 *_aidl_return = ret; 1522 return ok(); 1523} 1524 1525binder::Status InstalldNativeService::setAppQuota(const std::unique_ptr<std::string>& uuid, 1526 int32_t userId, int32_t appId, int64_t cacheQuota) { 1527 ENFORCE_UID(AID_SYSTEM); 1528 CHECK_ARGUMENT_UUID(uuid); 1529 std::lock_guard<std::recursive_mutex> lock(mLock); 1530 1531 int32_t uid = multiuser_get_uid(userId, appId); 1532 mCacheQuotas[uid] = cacheQuota; 1533 1534 return ok(); 1535} 1536 1537// Dumps the contents of a profile file, using pkgname's dex files for pretty 1538// printing the result. 1539binder::Status InstalldNativeService::dumpProfiles(int32_t uid, const std::string& packageName, 1540 const std::string& codePaths, bool* _aidl_return) { 1541 ENFORCE_UID(AID_SYSTEM); 1542 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1543 std::lock_guard<std::recursive_mutex> lock(mLock); 1544 1545 const char* pkgname = packageName.c_str(); 1546 const char* code_paths = codePaths.c_str(); 1547 1548 *_aidl_return = dump_profiles(uid, pkgname, code_paths); 1549 return ok(); 1550} 1551 1552// TODO: Consider returning error codes. 1553binder::Status InstalldNativeService::mergeProfiles(int32_t uid, const std::string& packageName, 1554 bool* _aidl_return) { 1555 ENFORCE_UID(AID_SYSTEM); 1556 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1557 std::lock_guard<std::recursive_mutex> lock(mLock); 1558 1559 const char* pkgname = packageName.c_str(); 1560 *_aidl_return = analyse_profiles(uid, pkgname); 1561 return ok(); 1562} 1563 1564binder::Status InstalldNativeService::dexopt(const std::string& apkPath, int32_t uid, 1565 const std::unique_ptr<std::string>& packageName, const std::string& instructionSet, 1566 int32_t dexoptNeeded, const std::unique_ptr<std::string>& outputPath, int32_t dexFlags, 1567 const std::string& compilerFilter, const std::unique_ptr<std::string>& uuid, 1568 const std::unique_ptr<std::string>& sharedLibraries) { 1569 ENFORCE_UID(AID_SYSTEM); 1570 CHECK_ARGUMENT_UUID(uuid); 1571 if (packageName && *packageName != "*") { 1572 CHECK_ARGUMENT_PACKAGE_NAME(*packageName); 1573 } 1574 std::lock_guard<std::recursive_mutex> lock(mLock); 1575 1576 const char* apk_path = apkPath.c_str(); 1577 const char* pkgname = packageName ? packageName->c_str() : "*"; 1578 const char* instruction_set = instructionSet.c_str(); 1579 const char* oat_dir = outputPath ? outputPath->c_str() : nullptr; 1580 const char* compiler_filter = compilerFilter.c_str(); 1581 const char* volume_uuid = uuid ? uuid->c_str() : nullptr; 1582 const char* shared_libraries = sharedLibraries ? sharedLibraries->c_str() : nullptr; 1583 1584 int res = android::installd::dexopt(apk_path, uid, pkgname, instruction_set, dexoptNeeded, 1585 oat_dir, dexFlags, compiler_filter, volume_uuid, shared_libraries); 1586 return res ? error(res, "Failed to dexopt") : ok(); 1587} 1588 1589binder::Status InstalldNativeService::markBootComplete(const std::string& instructionSet) { 1590 ENFORCE_UID(AID_SYSTEM); 1591 std::lock_guard<std::recursive_mutex> lock(mLock); 1592 1593 const char* instruction_set = instructionSet.c_str(); 1594 1595 char boot_marker_path[PKG_PATH_MAX]; 1596 sprintf(boot_marker_path, 1597 "%s/%s/%s/.booting", 1598 android_data_dir.path, 1599 DALVIK_CACHE, 1600 instruction_set); 1601 1602 ALOGV("mark_boot_complete : %s", boot_marker_path); 1603 if (unlink(boot_marker_path) != 0) { 1604 return error(StringPrintf("Failed to unlink %s", boot_marker_path)); 1605 } 1606 return ok(); 1607} 1608 1609void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid, 1610 struct stat* statbuf) 1611{ 1612 while (path[basepos] != 0) { 1613 if (path[basepos] == '/') { 1614 path[basepos] = 0; 1615 if (lstat(path, statbuf) < 0) { 1616 ALOGV("Making directory: %s\n", path); 1617 if (mkdir(path, mode) == 0) { 1618 chown(path, uid, gid); 1619 } else { 1620 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno)); 1621 } 1622 } 1623 path[basepos] = '/'; 1624 basepos++; 1625 } 1626 basepos++; 1627 } 1628} 1629 1630binder::Status InstalldNativeService::linkNativeLibraryDirectory( 1631 const std::unique_ptr<std::string>& uuid, const std::string& packageName, 1632 const std::string& nativeLibPath32, int32_t userId) { 1633 ENFORCE_UID(AID_SYSTEM); 1634 CHECK_ARGUMENT_UUID(uuid); 1635 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1636 std::lock_guard<std::recursive_mutex> lock(mLock); 1637 1638 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1639 const char* pkgname = packageName.c_str(); 1640 const char* asecLibDir = nativeLibPath32.c_str(); 1641 struct stat s, libStat; 1642 binder::Status res = ok(); 1643 1644 auto _pkgdir = create_data_user_ce_package_path(uuid_, userId, pkgname); 1645 auto _libsymlink = _pkgdir + PKG_LIB_POSTFIX; 1646 1647 const char* pkgdir = _pkgdir.c_str(); 1648 const char* libsymlink = _libsymlink.c_str(); 1649 1650 if (stat(pkgdir, &s) < 0) { 1651 return error("Failed to stat " + _pkgdir); 1652 } 1653 1654 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) { 1655 return error("Failed to chown " + _pkgdir); 1656 } 1657 1658 if (chmod(pkgdir, 0700) < 0) { 1659 res = error("Failed to chmod " + _pkgdir); 1660 goto out; 1661 } 1662 1663 if (lstat(libsymlink, &libStat) < 0) { 1664 if (errno != ENOENT) { 1665 res = error("Failed to stat " + _libsymlink); 1666 goto out; 1667 } 1668 } else { 1669 if (S_ISDIR(libStat.st_mode)) { 1670 if (delete_dir_contents(libsymlink, 1, NULL) < 0) { 1671 res = error("Failed to delete " + _libsymlink); 1672 goto out; 1673 } 1674 } else if (S_ISLNK(libStat.st_mode)) { 1675 if (unlink(libsymlink) < 0) { 1676 res = error("Failed to unlink " + _libsymlink); 1677 goto out; 1678 } 1679 } 1680 } 1681 1682 if (symlink(asecLibDir, libsymlink) < 0) { 1683 res = error("Failed to symlink " + _libsymlink + " to " + nativeLibPath32); 1684 goto out; 1685 } 1686 1687out: 1688 if (chmod(pkgdir, s.st_mode) < 0) { 1689 auto msg = "Failed to cleanup chmod " + _pkgdir; 1690 if (res.isOk()) { 1691 res = error(msg); 1692 } else { 1693 PLOG(ERROR) << msg; 1694 } 1695 } 1696 1697 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) { 1698 auto msg = "Failed to cleanup chown " + _pkgdir; 1699 if (res.isOk()) { 1700 res = error(msg); 1701 } else { 1702 PLOG(ERROR) << msg; 1703 } 1704 } 1705 1706 return res; 1707} 1708 1709static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd) 1710{ 1711 static const char *IDMAP_BIN = "/system/bin/idmap"; 1712 static const size_t MAX_INT_LEN = 32; 1713 char idmap_str[MAX_INT_LEN]; 1714 1715 snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd); 1716 1717 execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL); 1718 ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno)); 1719} 1720 1721// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix) 1722// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap 1723static int flatten_path(const char *prefix, const char *suffix, 1724 const char *overlay_path, char *idmap_path, size_t N) 1725{ 1726 if (overlay_path == NULL || idmap_path == NULL) { 1727 return -1; 1728 } 1729 const size_t len_overlay_path = strlen(overlay_path); 1730 // will access overlay_path + 1 further below; requires absolute path 1731 if (len_overlay_path < 2 || *overlay_path != '/') { 1732 return -1; 1733 } 1734 const size_t len_idmap_root = strlen(prefix); 1735 const size_t len_suffix = strlen(suffix); 1736 if (SIZE_MAX - len_idmap_root < len_overlay_path || 1737 SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) { 1738 // additions below would cause overflow 1739 return -1; 1740 } 1741 if (N < len_idmap_root + len_overlay_path + len_suffix) { 1742 return -1; 1743 } 1744 memset(idmap_path, 0, N); 1745 snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix); 1746 char *ch = idmap_path + len_idmap_root; 1747 while (*ch != '\0') { 1748 if (*ch == '/') { 1749 *ch = '@'; 1750 } 1751 ++ch; 1752 } 1753 return 0; 1754} 1755 1756binder::Status InstalldNativeService::idmap(const std::string& targetApkPath, 1757 const std::string& overlayApkPath, int32_t uid) { 1758 ENFORCE_UID(AID_SYSTEM); 1759 std::lock_guard<std::recursive_mutex> lock(mLock); 1760 1761 const char* target_apk = targetApkPath.c_str(); 1762 const char* overlay_apk = overlayApkPath.c_str(); 1763 ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid); 1764 1765 int idmap_fd = -1; 1766 char idmap_path[PATH_MAX]; 1767 1768 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1769 idmap_path, sizeof(idmap_path)) == -1) { 1770 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1771 goto fail; 1772 } 1773 1774 unlink(idmap_path); 1775 idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644); 1776 if (idmap_fd < 0) { 1777 ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno)); 1778 goto fail; 1779 } 1780 if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) { 1781 ALOGE("idmap cannot chown '%s'\n", idmap_path); 1782 goto fail; 1783 } 1784 if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { 1785 ALOGE("idmap cannot chmod '%s'\n", idmap_path); 1786 goto fail; 1787 } 1788 1789 pid_t pid; 1790 pid = fork(); 1791 if (pid == 0) { 1792 /* child -- drop privileges before continuing */ 1793 if (setgid(uid) != 0) { 1794 ALOGE("setgid(%d) failed during idmap\n", uid); 1795 exit(1); 1796 } 1797 if (setuid(uid) != 0) { 1798 ALOGE("setuid(%d) failed during idmap\n", uid); 1799 exit(1); 1800 } 1801 if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) { 1802 ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno)); 1803 exit(1); 1804 } 1805 1806 run_idmap(target_apk, overlay_apk, idmap_fd); 1807 exit(1); /* only if exec call to idmap failed */ 1808 } else { 1809 int status = wait_child(pid); 1810 if (status != 0) { 1811 ALOGE("idmap failed, status=0x%04x\n", status); 1812 goto fail; 1813 } 1814 } 1815 1816 close(idmap_fd); 1817 return ok(); 1818fail: 1819 if (idmap_fd >= 0) { 1820 close(idmap_fd); 1821 unlink(idmap_path); 1822 } 1823 return error(); 1824} 1825 1826binder::Status InstalldNativeService::removeIdmap(const std::string& overlayApkPath) { 1827 const char* overlay_apk = overlayApkPath.c_str(); 1828 char idmap_path[PATH_MAX]; 1829 1830 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1831 idmap_path, sizeof(idmap_path)) == -1) { 1832 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1833 return error(); 1834 } 1835 if (unlink(idmap_path) < 0) { 1836 ALOGE("couldn't unlink idmap file %s\n", idmap_path); 1837 return error(); 1838 } 1839 return ok(); 1840} 1841 1842binder::Status InstalldNativeService::restoreconAppData(const std::unique_ptr<std::string>& uuid, 1843 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 1844 const std::string& seInfo) { 1845 ENFORCE_UID(AID_SYSTEM); 1846 CHECK_ARGUMENT_UUID(uuid); 1847 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1848 std::lock_guard<std::recursive_mutex> lock(mLock); 1849 1850 binder::Status res = ok(); 1851 1852 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here. 1853 unsigned int seflags = SELINUX_ANDROID_RESTORECON_RECURSE; 1854 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1855 const char* pkgName = packageName.c_str(); 1856 const char* seinfo = seInfo.c_str(); 1857 1858 uid_t uid = multiuser_get_uid(userId, appId); 1859 if (flags & FLAG_STORAGE_CE) { 1860 auto path = create_data_user_ce_package_path(uuid_, userId, pkgName); 1861 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 1862 res = error("restorecon failed for " + path); 1863 } 1864 } 1865 if (flags & FLAG_STORAGE_DE) { 1866 auto path = create_data_user_de_package_path(uuid_, userId, pkgName); 1867 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 1868 res = error("restorecon failed for " + path); 1869 } 1870 } 1871 return res; 1872} 1873 1874binder::Status InstalldNativeService::createOatDir(const std::string& oatDir, 1875 const std::string& instructionSet) { 1876 ENFORCE_UID(AID_SYSTEM); 1877 std::lock_guard<std::recursive_mutex> lock(mLock); 1878 1879 const char* oat_dir = oatDir.c_str(); 1880 const char* instruction_set = instructionSet.c_str(); 1881 char oat_instr_dir[PKG_PATH_MAX]; 1882 1883 if (validate_apk_path(oat_dir)) { 1884 return error("Invalid path " + oatDir); 1885 } 1886 if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1887 return error("Failed to prepare " + oatDir); 1888 } 1889 if (selinux_android_restorecon(oat_dir, 0)) { 1890 return error("Failed to restorecon " + oatDir); 1891 } 1892 snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set); 1893 if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1894 return error(StringPrintf("Failed to prepare %s", oat_instr_dir)); 1895 } 1896 return ok(); 1897} 1898 1899binder::Status InstalldNativeService::rmPackageDir(const std::string& packageDir) { 1900 ENFORCE_UID(AID_SYSTEM); 1901 std::lock_guard<std::recursive_mutex> lock(mLock); 1902 1903 if (validate_apk_path(packageDir.c_str())) { 1904 return error("Invalid path " + packageDir); 1905 } 1906 if (delete_dir_contents_and_dir(packageDir) != 0) { 1907 return error("Failed to delete " + packageDir); 1908 } 1909 return ok(); 1910} 1911 1912binder::Status InstalldNativeService::linkFile(const std::string& relativePath, 1913 const std::string& fromBase, const std::string& toBase) { 1914 ENFORCE_UID(AID_SYSTEM); 1915 std::lock_guard<std::recursive_mutex> lock(mLock); 1916 1917 const char* relative_path = relativePath.c_str(); 1918 const char* from_base = fromBase.c_str(); 1919 const char* to_base = toBase.c_str(); 1920 char from_path[PKG_PATH_MAX]; 1921 char to_path[PKG_PATH_MAX]; 1922 snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path); 1923 snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path); 1924 1925 if (validate_apk_path_subdirs(from_path)) { 1926 return error(StringPrintf("Invalid from path %s", from_path)); 1927 } 1928 1929 if (validate_apk_path_subdirs(to_path)) { 1930 return error(StringPrintf("Invalid to path %s", to_path)); 1931 } 1932 1933 if (link(from_path, to_path) < 0) { 1934 return error(StringPrintf("Failed to link from %s to %s", from_path, to_path)); 1935 } 1936 1937 return ok(); 1938} 1939 1940binder::Status InstalldNativeService::moveAb(const std::string& apkPath, 1941 const std::string& instructionSet, const std::string& outputPath) { 1942 ENFORCE_UID(AID_SYSTEM); 1943 std::lock_guard<std::recursive_mutex> lock(mLock); 1944 1945 const char* apk_path = apkPath.c_str(); 1946 const char* instruction_set = instructionSet.c_str(); 1947 const char* oat_dir = outputPath.c_str(); 1948 1949 bool success = move_ab(apk_path, instruction_set, oat_dir); 1950 return success ? ok() : error(); 1951} 1952 1953binder::Status InstalldNativeService::deleteOdex(const std::string& apkPath, 1954 const std::string& instructionSet, const std::string& outputPath) { 1955 ENFORCE_UID(AID_SYSTEM); 1956 std::lock_guard<std::recursive_mutex> lock(mLock); 1957 1958 const char* apk_path = apkPath.c_str(); 1959 const char* instruction_set = instructionSet.c_str(); 1960 const char* oat_dir = outputPath.c_str(); 1961 1962 bool res = delete_odex(apk_path, instruction_set, oat_dir); 1963 return res ? ok() : error(); 1964} 1965 1966binder::Status InstalldNativeService::invalidateMounts() { 1967 ENFORCE_UID(AID_SYSTEM); 1968 std::lock_guard<std::recursive_mutex> lock(mLock); 1969 1970 mQuotaDevices.clear(); 1971 1972 std::ifstream in("/proc/mounts"); 1973 if (!in.is_open()) { 1974 return error("Failed to read mounts"); 1975 } 1976 1977 std::string source; 1978 std::string target; 1979 std::string ignored; 1980 struct dqblk dq; 1981 while (!in.eof()) { 1982 std::getline(in, source, ' '); 1983 std::getline(in, target, ' '); 1984 std::getline(in, ignored); 1985 1986 if (source.compare(0, 11, "/dev/block/") == 0) { 1987 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), source.c_str(), 0, 1988 reinterpret_cast<char*>(&dq)) == 0) { 1989 LOG(DEBUG) << "Found " << source << " with quota"; 1990 mQuotaDevices[target] = source; 1991 } 1992 } 1993 } 1994 return ok(); 1995} 1996 1997std::string InstalldNativeService::findQuotaDeviceForUuid( 1998 const std::unique_ptr<std::string>& uuid) { 1999 auto path = create_data_path(uuid ? uuid->c_str() : nullptr); 2000 return mQuotaDevices[path]; 2001} 2002 2003} // namespace installd 2004} // namespace android 2005