InstalldNativeService.cpp revision 7823e124e00576e20e47ec717cbe8bc89f0f2bf2
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#include <errno.h> 20#include <inttypes.h> 21#include <fstream> 22#include <fts.h> 23#include <regex> 24#include <stdlib.h> 25#include <string.h> 26#include <sys/capability.h> 27#include <sys/file.h> 28#include <sys/resource.h> 29#include <sys/quota.h> 30#include <sys/stat.h> 31#include <sys/statvfs.h> 32#include <sys/types.h> 33#include <sys/wait.h> 34#include <sys/xattr.h> 35#include <unistd.h> 36 37#include <android-base/logging.h> 38#include <android-base/stringprintf.h> 39#include <android-base/strings.h> 40#include <android-base/unique_fd.h> 41#include <cutils/fs.h> 42#include <cutils/properties.h> 43#include <cutils/sched_policy.h> 44#include <log/log.h> // TODO: Move everything to base/logging. 45#include <logwrap/logwrap.h> 46#include <private/android_filesystem_config.h> 47#include <selinux/android.h> 48#include <system/thread_defs.h> 49 50#include "dexopt.h" 51#include "globals.h" 52#include "installd_deps.h" 53#include "otapreopt_utils.h" 54#include "utils.h" 55 56#include "MatchExtensionGen.h" 57 58#ifndef LOG_TAG 59#define LOG_TAG "installd" 60#endif 61 62using android::base::StringPrintf; 63 64namespace android { 65namespace installd { 66 67static constexpr const char* kCpPath = "/system/bin/cp"; 68static constexpr const char* kXattrDefault = "user.default"; 69 70static constexpr const char* PKG_LIB_POSTFIX = "/lib"; 71static constexpr const char* CACHE_DIR_POSTFIX = "/cache"; 72static constexpr const char* CODE_CACHE_DIR_POSTFIX = "/code_cache"; 73 74static constexpr const char* IDMAP_PREFIX = "/data/resource-cache/"; 75static constexpr const char* IDMAP_SUFFIX = "@idmap"; 76 77// NOTE: keep in sync with StorageManager 78static constexpr int FLAG_STORAGE_DE = 1 << 0; 79static constexpr int FLAG_STORAGE_CE = 1 << 1; 80 81// NOTE: keep in sync with Installer 82static constexpr int FLAG_CLEAR_CACHE_ONLY = 1 << 8; 83static constexpr int FLAG_CLEAR_CODE_CACHE_ONLY = 1 << 9; 84static constexpr int FLAG_USE_QUOTA = 1 << 12; 85 86#define MIN_RESTRICTED_HOME_SDK_VERSION 24 // > M 87namespace { 88 89constexpr const char* kDump = "android.permission.DUMP"; 90 91static binder::Status ok() { 92 return binder::Status::ok(); 93} 94 95static binder::Status exception(uint32_t code, const std::string& msg) { 96 return binder::Status::fromExceptionCode(code, String8(msg.c_str())); 97} 98 99static binder::Status error() { 100 return binder::Status::fromServiceSpecificError(errno); 101} 102 103static binder::Status error(const std::string& msg) { 104 PLOG(ERROR) << msg; 105 return binder::Status::fromServiceSpecificError(errno, String8(msg.c_str())); 106} 107 108static binder::Status error(uint32_t code, const std::string& msg) { 109 LOG(ERROR) << msg << " (" << code << ")"; 110 return binder::Status::fromServiceSpecificError(code, String8(msg.c_str())); 111} 112 113binder::Status checkPermission(const char* permission) { 114 pid_t pid; 115 uid_t uid; 116 117 if (checkCallingPermission(String16(permission), reinterpret_cast<int32_t*>(&pid), 118 reinterpret_cast<int32_t*>(&uid))) { 119 return ok(); 120 } else { 121 return exception(binder::Status::EX_SECURITY, 122 StringPrintf("UID %d / PID %d lacks permission %s", uid, pid, permission)); 123 } 124} 125 126binder::Status checkUid(uid_t expectedUid) { 127 uid_t uid = IPCThreadState::self()->getCallingUid(); 128 if (uid == expectedUid || uid == AID_ROOT) { 129 return ok(); 130 } else { 131 return exception(binder::Status::EX_SECURITY, 132 StringPrintf("UID %d is not expected UID %d", uid, expectedUid)); 133 } 134} 135 136binder::Status checkArgumentUuid(const std::unique_ptr<std::string>& uuid) { 137 if (!uuid || is_valid_filename(*uuid)) { 138 return ok(); 139 } else { 140 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 141 StringPrintf("UUID %s is malformed", uuid->c_str())); 142 } 143} 144 145binder::Status checkArgumentPackageName(const std::string& packageName) { 146 if (is_valid_package_name(packageName.c_str())) { 147 return ok(); 148 } else { 149 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 150 StringPrintf("Package name %s is malformed", packageName.c_str())); 151 } 152} 153 154#define ENFORCE_UID(uid) { \ 155 binder::Status status = checkUid((uid)); \ 156 if (!status.isOk()) { \ 157 return status; \ 158 } \ 159} 160 161#define CHECK_ARGUMENT_UUID(uuid) { \ 162 binder::Status status = checkArgumentUuid((uuid)); \ 163 if (!status.isOk()) { \ 164 return status; \ 165 } \ 166} 167 168#define CHECK_ARGUMENT_PACKAGE_NAME(packageName) { \ 169 binder::Status status = \ 170 checkArgumentPackageName((packageName)); \ 171 if (!status.isOk()) { \ 172 return status; \ 173 } \ 174} 175 176} // namespace 177 178status_t InstalldNativeService::start() { 179 IPCThreadState::self()->disableBackgroundScheduling(true); 180 status_t ret = BinderService<InstalldNativeService>::publish(); 181 if (ret != android::OK) { 182 return ret; 183 } 184 sp<ProcessState> ps(ProcessState::self()); 185 ps->startThreadPool(); 186 ps->giveThreadPoolName(); 187 return android::OK; 188} 189 190status_t InstalldNativeService::dump(int fd, const Vector<String16> & /* args */) { 191 const binder::Status dump_permission = checkPermission(kDump); 192 if (!dump_permission.isOk()) { 193 const String8 msg(dump_permission.toString8()); 194 write(fd, msg.string(), msg.size()); 195 return PERMISSION_DENIED; 196 } 197 198 std::string msg = "installd is happy\n"; 199 write(fd, msg.c_str(), strlen(msg.c_str())); 200 return NO_ERROR; 201} 202 203/** 204 * Perform restorecon of the given path, but only perform recursive restorecon 205 * if the label of that top-level file actually changed. This can save us 206 * significant time by avoiding no-op traversals of large filesystem trees. 207 */ 208static int restorecon_app_data_lazy(const std::string& path, const std::string& seInfo, uid_t uid, 209 bool existing) { 210 int res = 0; 211 char* before = nullptr; 212 char* after = nullptr; 213 214 // Note that SELINUX_ANDROID_RESTORECON_DATADATA flag is set by 215 // libselinux. Not needed here. 216 217 if (lgetfilecon(path.c_str(), &before) < 0) { 218 PLOG(ERROR) << "Failed before getfilecon for " << path; 219 goto fail; 220 } 221 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 0) < 0) { 222 PLOG(ERROR) << "Failed top-level restorecon for " << path; 223 goto fail; 224 } 225 if (lgetfilecon(path.c_str(), &after) < 0) { 226 PLOG(ERROR) << "Failed after getfilecon for " << path; 227 goto fail; 228 } 229 230 // If the initial top-level restorecon above changed the label, then go 231 // back and restorecon everything recursively 232 if (strcmp(before, after)) { 233 if (existing) { 234 LOG(DEBUG) << "Detected label change from " << before << " to " << after << " at " 235 << path << "; running recursive restorecon"; 236 } 237 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 238 SELINUX_ANDROID_RESTORECON_RECURSE) < 0) { 239 PLOG(ERROR) << "Failed recursive restorecon for " << path; 240 goto fail; 241 } 242 } 243 244 goto done; 245fail: 246 res = -1; 247done: 248 free(before); 249 free(after); 250 return res; 251} 252 253static int restorecon_app_data_lazy(const std::string& parent, const char* name, 254 const std::string& seInfo, uid_t uid, bool existing) { 255 return restorecon_app_data_lazy(StringPrintf("%s/%s", parent.c_str(), name), seInfo, uid, 256 existing); 257} 258 259static int prepare_app_dir(const std::string& path, mode_t target_mode, uid_t uid) { 260 if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, uid) != 0) { 261 PLOG(ERROR) << "Failed to prepare " << path; 262 return -1; 263 } 264 return 0; 265} 266 267/** 268 * Prepare an app cache directory, which offers to fix-up the GID and 269 * directory mode flags during a platform upgrade. 270 */ 271static int prepare_app_cache_dir(const std::string& parent, const char* name, mode_t target_mode, 272 uid_t uid, gid_t gid) { 273 auto path = StringPrintf("%s/%s", parent.c_str(), name); 274 struct stat st; 275 if (stat(path.c_str(), &st) != 0) { 276 if (errno == ENOENT) { 277 // This is fine, just create it 278 if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, gid) != 0) { 279 PLOG(ERROR) << "Failed to prepare " << path; 280 return -1; 281 } else { 282 return 0; 283 } 284 } else { 285 PLOG(ERROR) << "Failed to stat " << path; 286 return -1; 287 } 288 } 289 290 if (st.st_uid != uid) { 291 // Mismatched UID is real trouble; we can't recover 292 LOG(ERROR) << "Mismatched UID at " << path << ": found " << st.st_uid 293 << " but expected " << uid; 294 return -1; 295 } else if (st.st_gid == gid && st.st_mode == target_mode) { 296 // Everything looks good! 297 return 0; 298 } 299 300 // Directory is owned correctly, but GID or mode mismatch means it's 301 // probably a platform upgrade so we need to fix them 302 FTS *fts; 303 FTSENT *p; 304 char *argv[] = { (char*) path.c_str(), nullptr }; 305 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 306 PLOG(ERROR) << "Failed to fts_open " << path; 307 return -1; 308 } 309 while ((p = fts_read(fts)) != NULL) { 310 switch (p->fts_info) { 311 case FTS_DP: 312 if (chmod(p->fts_accpath, target_mode) != 0) { 313 PLOG(WARNING) << "Failed to chmod " << p->fts_path; 314 } 315 // Intentional fall through to also set GID 316 case FTS_F: 317 if (chown(p->fts_accpath, -1, gid) != 0) { 318 PLOG(WARNING) << "Failed to chown " << p->fts_path; 319 } 320 break; 321 case FTS_SL: 322 case FTS_SLNONE: 323 if (lchown(p->fts_accpath, -1, gid) != 0) { 324 PLOG(WARNING) << "Failed to chown " << p->fts_path; 325 } 326 break; 327 } 328 } 329 fts_close(fts); 330 return 0; 331} 332 333binder::Status InstalldNativeService::createAppData(const std::unique_ptr<std::string>& uuid, 334 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 335 const std::string& seInfo, int32_t targetSdkVersion, int64_t* _aidl_return) { 336 ENFORCE_UID(AID_SYSTEM); 337 CHECK_ARGUMENT_UUID(uuid); 338 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 339 340 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 uid_t uid = multiuser_get_uid(userId, appId); 347 gid_t cacheGid = multiuser_get_cache_gid(userId, appId); 348 mode_t targetMode = targetSdkVersion >= MIN_RESTRICTED_HOME_SDK_VERSION ? 0700 : 0751; 349 350 if (flags & FLAG_STORAGE_CE) { 351 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname); 352 bool existing = (access(path.c_str(), F_OK) == 0); 353 354 if (prepare_app_dir(path, targetMode, uid) || 355 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 356 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 357 return error("Failed to prepare " + path); 358 } 359 360 // Consider restorecon over contents if label changed 361 if (restorecon_app_data_lazy(path, seInfo, uid, existing) || 362 restorecon_app_data_lazy(path, "cache", seInfo, uid, existing) || 363 restorecon_app_data_lazy(path, "code_cache", seInfo, uid, existing)) { 364 return error("Failed to restorecon " + path); 365 } 366 367 // Remember inode numbers of cache directories so that we can clear 368 // contents while CE storage is locked 369 if (write_path_inode(path, "cache", kXattrInodeCache) || 370 write_path_inode(path, "code_cache", kXattrInodeCodeCache)) { 371 return error("Failed to write_path_inode for " + path); 372 } 373 374 // And return the CE inode of the top-level data directory so we can 375 // clear contents while CE storage is locked 376 if ((_aidl_return != nullptr) 377 && get_path_inode(path, reinterpret_cast<ino_t*>(_aidl_return)) != 0) { 378 return error("Failed to get_path_inode for " + path); 379 } 380 } 381 if (flags & FLAG_STORAGE_DE) { 382 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 383 bool existing = (access(path.c_str(), F_OK) == 0); 384 385 if (prepare_app_dir(path, targetMode, uid) || 386 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 387 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 388 return error("Failed to prepare " + path); 389 } 390 391 // Consider restorecon over contents if label changed 392 if (restorecon_app_data_lazy(path, seInfo, uid, existing)) { 393 return error("Failed to restorecon " + path); 394 } 395 396 if (property_get_bool("dalvik.vm.usejitprofiles", false)) { 397 const std::string profile_path = create_data_user_profile_package_path(userId, pkgname); 398 // read-write-execute only for the app user. 399 if (fs_prepare_dir_strict(profile_path.c_str(), 0700, uid, uid) != 0) { 400 return error("Failed to prepare " + profile_path); 401 } 402 std::string profile_file = create_primary_profile(profile_path); 403 // read-write only for the app user. 404 if (fs_prepare_file_strict(profile_file.c_str(), 0600, uid, uid) != 0) { 405 return error("Failed to prepare " + profile_path); 406 } 407 const std::string ref_profile_path = create_data_ref_profile_package_path(pkgname); 408 // dex2oat/profman runs under the shared app gid and it needs to read/write reference 409 // profiles. 410 int shared_app_gid = multiuser_get_shared_gid(0, appId); 411 if ((shared_app_gid != -1) && fs_prepare_dir_strict( 412 ref_profile_path.c_str(), 0700, shared_app_gid, shared_app_gid) != 0) { 413 return error("Failed to prepare " + ref_profile_path); 414 } 415 } 416 } 417 return ok(); 418} 419 420binder::Status InstalldNativeService::migrateAppData(const std::unique_ptr<std::string>& uuid, 421 const std::string& packageName, int32_t userId, int32_t flags) { 422 ENFORCE_UID(AID_SYSTEM); 423 CHECK_ARGUMENT_UUID(uuid); 424 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 425 426 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 427 const char* pkgname = packageName.c_str(); 428 429 // This method only exists to upgrade system apps that have requested 430 // forceDeviceEncrypted, so their default storage always lives in a 431 // consistent location. This only works on non-FBE devices, since we 432 // never want to risk exposing data on a device with real CE/DE storage. 433 434 auto ce_path = create_data_user_ce_package_path(uuid_, userId, pkgname); 435 auto de_path = create_data_user_de_package_path(uuid_, userId, pkgname); 436 437 // If neither directory is marked as default, assume CE is default 438 if (getxattr(ce_path.c_str(), kXattrDefault, nullptr, 0) == -1 439 && getxattr(de_path.c_str(), kXattrDefault, nullptr, 0) == -1) { 440 if (setxattr(ce_path.c_str(), kXattrDefault, nullptr, 0, 0) != 0) { 441 return error("Failed to mark default storage " + ce_path); 442 } 443 } 444 445 // Migrate default data location if needed 446 auto target = (flags & FLAG_STORAGE_DE) ? de_path : ce_path; 447 auto source = (flags & FLAG_STORAGE_DE) ? ce_path : de_path; 448 449 if (getxattr(target.c_str(), kXattrDefault, nullptr, 0) == -1) { 450 LOG(WARNING) << "Requested default storage " << target 451 << " is not active; migrating from " << source; 452 if (delete_dir_contents_and_dir(target) != 0) { 453 return error("Failed to delete " + target); 454 } 455 if (rename(source.c_str(), target.c_str()) != 0) { 456 return error("Failed to rename " + source + " to " + target); 457 } 458 } 459 460 return ok(); 461} 462 463 464binder::Status InstalldNativeService::clearAppProfiles(const std::string& packageName) { 465 ENFORCE_UID(AID_SYSTEM); 466 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 467 468 const char* pkgname = packageName.c_str(); 469 binder::Status res = ok(); 470 if (!clear_reference_profile(pkgname)) { 471 res = error("Failed to clear reference profile for " + packageName); 472 } 473 if (!clear_current_profiles(pkgname)) { 474 res = error("Failed to clear current profiles for " + packageName); 475 } 476 return res; 477} 478 479binder::Status InstalldNativeService::clearAppData(const std::unique_ptr<std::string>& uuid, 480 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 481 ENFORCE_UID(AID_SYSTEM); 482 CHECK_ARGUMENT_UUID(uuid); 483 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 484 485 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 486 const char* pkgname = packageName.c_str(); 487 488 binder::Status res = ok(); 489 if (flags & FLAG_STORAGE_CE) { 490 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 491 if (flags & FLAG_CLEAR_CACHE_ONLY) { 492 path = read_path_inode(path, "cache", kXattrInodeCache); 493 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 494 path = read_path_inode(path, "code_cache", kXattrInodeCodeCache); 495 } 496 if (access(path.c_str(), F_OK) == 0) { 497 if (delete_dir_contents(path) != 0) { 498 res = error("Failed to delete contents of " + path); 499 } 500 } 501 } 502 if (flags & FLAG_STORAGE_DE) { 503 std::string suffix = ""; 504 bool only_cache = false; 505 if (flags & FLAG_CLEAR_CACHE_ONLY) { 506 suffix = CACHE_DIR_POSTFIX; 507 only_cache = true; 508 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 509 suffix = CODE_CACHE_DIR_POSTFIX; 510 only_cache = true; 511 } 512 513 auto path = create_data_user_de_package_path(uuid_, userId, pkgname) + suffix; 514 if (access(path.c_str(), F_OK) == 0) { 515 if (delete_dir_contents(path) != 0) { 516 res = error("Failed to delete contents of " + path); 517 } 518 } 519 if (!only_cache) { 520 if (!clear_current_profile(pkgname, userId)) { 521 res = error("Failed to clear current profile for " + packageName); 522 } 523 } 524 } 525 return res; 526} 527 528static int destroy_app_reference_profile(const char *pkgname) { 529 return delete_dir_contents_and_dir( 530 create_data_ref_profile_package_path(pkgname), 531 /*ignore_if_missing*/ true); 532} 533 534static int destroy_app_current_profiles(const char *pkgname, userid_t userid) { 535 return delete_dir_contents_and_dir( 536 create_data_user_profile_package_path(userid, pkgname), 537 /*ignore_if_missing*/ true); 538} 539 540binder::Status InstalldNativeService::destroyAppProfiles(const std::string& packageName) { 541 ENFORCE_UID(AID_SYSTEM); 542 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 543 544 const char* pkgname = packageName.c_str(); 545 binder::Status res = ok(); 546 std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr); 547 for (auto user : users) { 548 if (destroy_app_current_profiles(pkgname, user) != 0) { 549 res = error("Failed to destroy current profiles for " + packageName); 550 } 551 } 552 if (destroy_app_reference_profile(pkgname) != 0) { 553 res = error("Failed to destroy reference profile for " + packageName); 554 } 555 return res; 556} 557 558binder::Status InstalldNativeService::destroyAppData(const std::unique_ptr<std::string>& uuid, 559 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 560 ENFORCE_UID(AID_SYSTEM); 561 CHECK_ARGUMENT_UUID(uuid); 562 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 563 564 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 565 const char* pkgname = packageName.c_str(); 566 567 binder::Status res = ok(); 568 if (flags & FLAG_STORAGE_CE) { 569 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 570 if (delete_dir_contents_and_dir(path) != 0) { 571 res = error("Failed to delete " + path); 572 } 573 } 574 if (flags & FLAG_STORAGE_DE) { 575 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 576 if (delete_dir_contents_and_dir(path) != 0) { 577 res = error("Failed to delete " + path); 578 } 579 destroy_app_current_profiles(pkgname, userId); 580 // TODO(calin): If the package is still installed by other users it's probably 581 // beneficial to keep the reference profile around. 582 // Verify if it's ok to do that. 583 destroy_app_reference_profile(pkgname); 584 } 585 return res; 586} 587 588binder::Status InstalldNativeService::moveCompleteApp(const std::unique_ptr<std::string>& fromUuid, 589 const std::unique_ptr<std::string>& toUuid, const std::string& packageName, 590 const std::string& dataAppName, int32_t appId, const std::string& seInfo, 591 int32_t targetSdkVersion) { 592 ENFORCE_UID(AID_SYSTEM); 593 CHECK_ARGUMENT_UUID(fromUuid); 594 CHECK_ARGUMENT_UUID(toUuid); 595 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 596 597 const char* from_uuid = fromUuid ? fromUuid->c_str() : nullptr; 598 const char* to_uuid = toUuid ? toUuid->c_str() : nullptr; 599 const char* package_name = packageName.c_str(); 600 const char* data_app_name = dataAppName.c_str(); 601 602 binder::Status res = ok(); 603 std::vector<userid_t> users = get_known_users(from_uuid); 604 605 // Copy app 606 { 607 auto from = create_data_app_package_path(from_uuid, data_app_name); 608 auto to = create_data_app_package_path(to_uuid, data_app_name); 609 auto to_parent = create_data_app_path(to_uuid); 610 611 char *argv[] = { 612 (char*) kCpPath, 613 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 614 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 615 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 616 (char*) "-P", /* Do not follow symlinks [default] */ 617 (char*) "-d", /* don't dereference symlinks */ 618 (char*) from.c_str(), 619 (char*) to_parent.c_str() 620 }; 621 622 LOG(DEBUG) << "Copying " << from << " to " << to; 623 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 624 if (rc != 0) { 625 res = error(rc, "Failed copying " + from + " to " + to); 626 goto fail; 627 } 628 629 if (selinux_android_restorecon(to.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) { 630 res = error("Failed to restorecon " + to); 631 goto fail; 632 } 633 } 634 635 // Copy private data for all known users 636 for (auto user : users) { 637 638 // Data source may not exist for all users; that's okay 639 auto from_ce = create_data_user_ce_package_path(from_uuid, user, package_name); 640 if (access(from_ce.c_str(), F_OK) != 0) { 641 LOG(INFO) << "Missing source " << from_ce; 642 continue; 643 } 644 645 if (!createAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, appId, 646 seInfo, targetSdkVersion, nullptr).isOk()) { 647 res = error("Failed to create package target"); 648 goto fail; 649 } 650 651 char *argv[] = { 652 (char*) kCpPath, 653 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 654 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 655 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 656 (char*) "-P", /* Do not follow symlinks [default] */ 657 (char*) "-d", /* don't dereference symlinks */ 658 nullptr, 659 nullptr 660 }; 661 662 { 663 auto from = create_data_user_de_package_path(from_uuid, user, package_name); 664 auto to = create_data_user_de_path(to_uuid, user); 665 argv[6] = (char*) from.c_str(); 666 argv[7] = (char*) to.c_str(); 667 668 LOG(DEBUG) << "Copying " << from << " to " << to; 669 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 670 if (rc != 0) { 671 res = error(rc, "Failed copying " + from + " to " + to); 672 goto fail; 673 } 674 } 675 { 676 auto from = create_data_user_ce_package_path(from_uuid, user, package_name); 677 auto to = create_data_user_ce_path(to_uuid, user); 678 argv[6] = (char*) from.c_str(); 679 argv[7] = (char*) to.c_str(); 680 681 LOG(DEBUG) << "Copying " << from << " to " << to; 682 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 683 if (rc != 0) { 684 res = error(rc, "Failed copying " + from + " to " + to); 685 goto fail; 686 } 687 } 688 689 if (!restoreconAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, 690 appId, seInfo).isOk()) { 691 res = error("Failed to restorecon"); 692 goto fail; 693 } 694 } 695 696 // We let the framework scan the new location and persist that before 697 // deleting the data in the old location; this ordering ensures that 698 // we can recover from things like battery pulls. 699 return ok(); 700 701fail: 702 // Nuke everything we might have already copied 703 { 704 auto to = create_data_app_package_path(to_uuid, data_app_name); 705 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 706 LOG(WARNING) << "Failed to rollback " << to; 707 } 708 } 709 for (auto user : users) { 710 { 711 auto to = create_data_user_de_package_path(to_uuid, user, package_name); 712 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 713 LOG(WARNING) << "Failed to rollback " << to; 714 } 715 } 716 { 717 auto to = create_data_user_ce_package_path(to_uuid, user, package_name); 718 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 719 LOG(WARNING) << "Failed to rollback " << to; 720 } 721 } 722 } 723 return res; 724} 725 726binder::Status InstalldNativeService::createUserData(const std::unique_ptr<std::string>& uuid, 727 int32_t userId, int32_t userSerial ATTRIBUTE_UNUSED, int32_t flags) { 728 ENFORCE_UID(AID_SYSTEM); 729 CHECK_ARGUMENT_UUID(uuid); 730 731 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 732 if (flags & FLAG_STORAGE_DE) { 733 if (uuid_ == nullptr) { 734 if (ensure_config_user_dirs(userId) != 0) { 735 return error(StringPrintf("Failed to ensure dirs for %d", userId)); 736 } 737 } 738 } 739 return ok(); 740} 741 742binder::Status InstalldNativeService::destroyUserData(const std::unique_ptr<std::string>& uuid, 743 int32_t userId, int32_t flags) { 744 ENFORCE_UID(AID_SYSTEM); 745 CHECK_ARGUMENT_UUID(uuid); 746 747 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 748 binder::Status res = ok(); 749 if (flags & FLAG_STORAGE_DE) { 750 auto path = create_data_user_de_path(uuid_, userId); 751 if (delete_dir_contents_and_dir(path, true) != 0) { 752 res = error("Failed to delete " + path); 753 } 754 if (uuid_ == nullptr) { 755 path = create_data_misc_legacy_path(userId); 756 if (delete_dir_contents_and_dir(path, true) != 0) { 757 res = error("Failed to delete " + path); 758 } 759 path = create_data_user_profile_path(userId); 760 if (delete_dir_contents_and_dir(path, true) != 0) { 761 res = error("Failed to delete " + path); 762 } 763 } 764 } 765 if (flags & FLAG_STORAGE_CE) { 766 auto path = create_data_user_ce_path(uuid_, userId); 767 if (delete_dir_contents_and_dir(path, true) != 0) { 768 res = error("Failed to delete " + path); 769 } 770 path = create_data_media_path(uuid_, userId); 771 if (delete_dir_contents_and_dir(path, true) != 0) { 772 res = error("Failed to delete " + path); 773 } 774 } 775 return res; 776} 777 778/* Try to ensure free_size bytes of storage are available. 779 * Returns 0 on success. 780 * This is rather simple-minded because doing a full LRU would 781 * be potentially memory-intensive, and without atime it would 782 * also require that apps constantly modify file metadata even 783 * when just reading from the cache, which is pretty awful. 784 */ 785binder::Status InstalldNativeService::freeCache(const std::unique_ptr<std::string>& uuid, 786 int64_t freeStorageSize) { 787 ENFORCE_UID(AID_SYSTEM); 788 CHECK_ARGUMENT_UUID(uuid); 789 790 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 791 cache_t* cache; 792 int64_t avail; 793 794 auto data_path = create_data_path(uuid_); 795 796 avail = data_disk_free(data_path); 797 if (avail < 0) { 798 return error("Failed to determine free space for " + data_path); 799 } 800 801 ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", freeStorageSize, avail); 802 if (avail >= freeStorageSize) { 803 return ok(); 804 } 805 806 cache = start_cache_collection(); 807 808 auto users = get_known_users(uuid_); 809 for (auto user : users) { 810 add_cache_files(cache, create_data_user_ce_path(uuid_, user)); 811 add_cache_files(cache, create_data_user_de_path(uuid_, user)); 812 add_cache_files(cache, 813 StringPrintf("%s/Android/data", create_data_media_path(uuid_, user).c_str())); 814 } 815 816 clear_cache_files(data_path, cache, freeStorageSize); 817 finish_cache_collection(cache); 818 819 avail = data_disk_free(data_path); 820 if (avail >= freeStorageSize) { 821 return ok(); 822 } else { 823 return error(StringPrintf("Failed to free up %" PRId64 " on %s; final free space %" PRId64, 824 freeStorageSize, data_path.c_str(), avail)); 825 } 826} 827 828binder::Status InstalldNativeService::rmdex(const std::string& codePath, 829 const std::string& instructionSet) { 830 ENFORCE_UID(AID_SYSTEM); 831 char dex_path[PKG_PATH_MAX]; 832 833 const char* path = codePath.c_str(); 834 const char* instruction_set = instructionSet.c_str(); 835 836 if (validate_apk_path(path) && validate_system_app_path(path)) { 837 return error("Invalid path " + codePath); 838 } 839 840 if (!create_cache_path(dex_path, path, instruction_set)) { 841 return error("Failed to create cache path for " + codePath); 842 } 843 844 ALOGV("unlink %s\n", dex_path); 845 if (unlink(dex_path) < 0) { 846 return error(StringPrintf("Failed to unlink %s", dex_path)); 847 } else { 848 return ok(); 849 } 850} 851 852struct stats { 853 int64_t codeSize; 854 int64_t dataSize; 855 int64_t cacheSize; 856}; 857 858#if MEASURE_DEBUG 859static std::string toString(std::vector<int64_t> values) { 860 std::stringstream res; 861 res << "["; 862 for (size_t i = 0; i < values.size(); i++) { 863 res << values[i]; 864 if (i < values.size() - 1) { 865 res << ","; 866 } 867 } 868 res << "]"; 869 return res.str(); 870} 871#endif 872 873static std::string findDeviceForUuid(const std::unique_ptr<std::string>& uuid) { 874 auto path = create_data_path(uuid ? uuid->c_str() : nullptr); 875 std::ifstream in("/proc/mounts"); 876 if (!in.is_open()) { 877 PLOG(ERROR) << "Failed to read mounts"; 878 return ""; 879 } 880 std::string source; 881 std::string target; 882 while (!in.eof()) { 883 std::getline(in, source, ' '); 884 std::getline(in, target, ' '); 885 if (target == path) { 886 return source; 887 } 888 // Skip to next line 889 std::getline(in, source); 890 } 891 PLOG(ERROR) << "Failed to resolve block device for " << path; 892 return ""; 893} 894 895static void collectQuotaStats(const std::string& device, int32_t userId, 896 int32_t appId, struct stats* stats, struct stats* extStats ATTRIBUTE_UNUSED) { 897 if (device.empty()) return; 898 899 struct dqblk dq; 900 901 uid_t uid = multiuser_get_uid(userId, appId); 902 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 903 reinterpret_cast<char*>(&dq)) != 0) { 904 if (errno != ESRCH) { 905 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 906 } 907 } else { 908#if MEASURE_DEBUG 909 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 910#endif 911 stats->dataSize += dq.dqb_curspace; 912 } 913 914 int cacheGid = multiuser_get_cache_gid(userId, appId); 915 if (cacheGid != -1) { 916 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), cacheGid, 917 reinterpret_cast<char*>(&dq)) != 0) { 918 if (errno != ESRCH) { 919 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << cacheGid; 920 } 921 } else { 922#if MEASURE_DEBUG 923 LOG(DEBUG) << "quotactl() for GID " << cacheGid << " " << dq.dqb_curspace; 924#endif 925 stats->cacheSize += dq.dqb_curspace; 926 } 927 } 928 929 int sharedGid = multiuser_get_shared_app_gid(uid); 930 if (sharedGid != -1) { 931 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), sharedGid, 932 reinterpret_cast<char*>(&dq)) != 0) { 933 if (errno != ESRCH) { 934 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << sharedGid; 935 } 936 } else { 937#if MEASURE_DEBUG 938 LOG(DEBUG) << "quotactl() for GID " << sharedGid << " " << dq.dqb_curspace; 939#endif 940 stats->codeSize += dq.dqb_curspace; 941 } 942 } 943 944#if MEASURE_EXTERNAL 945 // TODO: measure using external GIDs 946#endif 947} 948 949static void collectQuotaStats(const std::unique_ptr<std::string>& uuid, int32_t userId, 950 int32_t appId, struct stats* stats, struct stats* extStats) { 951 collectQuotaStats(findDeviceForUuid(uuid), userId, appId, stats, extStats); 952} 953 954static void collectManualStats(const std::string& path, struct stats* stats) { 955 DIR *d; 956 int dfd; 957 struct dirent *de; 958 struct stat s; 959 960 d = opendir(path.c_str()); 961 if (d == nullptr) { 962 if (errno != ENOENT) { 963 PLOG(WARNING) << "Failed to open " << path; 964 } 965 return; 966 } 967 dfd = dirfd(d); 968 while ((de = readdir(d))) { 969 const char *name = de->d_name; 970 971 int64_t size = 0; 972 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 973 size = s.st_blocks * 512; 974 } 975 976 if (de->d_type == DT_DIR) { 977 if (!strcmp(name, ".")) { 978 // Don't recurse, but still count node size 979 } else if (!strcmp(name, "..")) { 980 // Don't recurse or count node size 981 continue; 982 } else { 983 // Measure all children nodes 984 size = 0; 985 calculate_tree_size(StringPrintf("%s/%s", path.c_str(), name), &size); 986 } 987 988 if (!strcmp(name, "cache") || !strcmp(name, "code_cache")) { 989 stats->cacheSize += size; 990 } 991 } 992 993 // Legacy symlink isn't owned by app 994 if (de->d_type == DT_LNK && !strcmp(name, "lib")) { 995 continue; 996 } 997 998 // Everything found inside is considered data 999 stats->dataSize += size; 1000 } 1001 closedir(d); 1002} 1003 1004static void collectManualStatsForUser(const std::string& path, struct stats* stats, 1005 bool exclude_apps = false) { 1006 DIR *d; 1007 int dfd; 1008 struct dirent *de; 1009 struct stat s; 1010 1011 d = opendir(path.c_str()); 1012 if (d == nullptr) { 1013 if (errno != ENOENT) { 1014 PLOG(WARNING) << "Failed to open " << path; 1015 } 1016 return; 1017 } 1018 dfd = dirfd(d); 1019 while ((de = readdir(d))) { 1020 if (de->d_type == DT_DIR) { 1021 const char *name = de->d_name; 1022 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) != 0) { 1023 continue; 1024 } 1025 if (!strcmp(name, ".") || !strcmp(name, "..")) { 1026 continue; 1027 } else if (exclude_apps && (s.st_uid >= AID_APP_START && s.st_uid <= AID_APP_END)) { 1028 continue; 1029 } else { 1030 collectManualStats(StringPrintf("%s/%s", path.c_str(), name), stats); 1031 } 1032 } 1033 } 1034 closedir(d); 1035} 1036 1037binder::Status InstalldNativeService::getAppSize(const std::unique_ptr<std::string>& uuid, 1038 const std::vector<std::string>& packageNames, int32_t userId, int32_t flags, 1039 int32_t appId, const std::vector<int64_t>& ceDataInodes, 1040 const std::vector<std::string>& codePaths, std::vector<int64_t>* _aidl_return) { 1041 ENFORCE_UID(AID_SYSTEM); 1042 CHECK_ARGUMENT_UUID(uuid); 1043 for (auto packageName : packageNames) { 1044 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1045 } 1046 1047 // When modifying this logic, always verify using tests: 1048 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetAppSize 1049 1050#if MEASURE_DEBUG 1051 LOG(INFO) << "Measuring user " << userId << " app " << appId; 1052#endif 1053 1054 // Here's a summary of the common storage locations across the platform, 1055 // and how they're each tagged: 1056 // 1057 // /data/app/com.example UID system 1058 // /data/app/com.example/oat UID system 1059 // /data/user/0/com.example UID u0_a10 GID u0_a10 1060 // /data/user/0/com.example/cache UID u0_a10 GID u0_a10_cache 1061 // /data/media/0/foo.txt UID u0_media_rw 1062 // /data/media/0/bar.jpg UID u0_media_rw GID u0_media_image 1063 // /data/media/0/Android/data/com.example UID u0_media_rw GID u0_a10_ext 1064 // /data/media/0/Android/data/com.example/cache UID u0_media_rw GID u0_a10_ext_cache 1065 // /data/media/obb/com.example UID system 1066 1067 struct stats stats; 1068 struct stats extStats; 1069 memset(&stats, 0, sizeof(stats)); 1070 memset(&extStats, 0, sizeof(extStats)); 1071 1072 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1073 1074 for (auto packageName : packageNames) { 1075 auto obbCodePath = create_data_media_obb_path(uuid_, packageName.c_str()); 1076 calculate_tree_size(obbCodePath, &extStats.codeSize); 1077 } 1078 1079 if (flags & FLAG_USE_QUOTA && appId >= AID_APP_START) { 1080 for (auto codePath : codePaths) { 1081 calculate_tree_size(codePath, &stats.codeSize, -1, 1082 multiuser_get_shared_gid(userId, appId)); 1083 } 1084 1085 collectQuotaStats(uuid, userId, appId, &stats, &extStats); 1086 1087 } else { 1088 for (auto codePath : codePaths) { 1089 calculate_tree_size(codePath, &stats.codeSize); 1090 } 1091 1092 for (size_t i = 0; i < packageNames.size(); i++) { 1093 const char* pkgname = packageNames[i].c_str(); 1094 1095 auto cePath = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInodes[i]); 1096 collectManualStats(cePath, &stats); 1097 1098 auto dePath = create_data_user_de_package_path(uuid_, userId, pkgname); 1099 collectManualStats(dePath, &stats); 1100 1101 auto userProfilePath = create_data_user_profile_package_path(userId, pkgname); 1102 calculate_tree_size(userProfilePath, &stats.dataSize); 1103 1104 auto refProfilePath = create_data_ref_profile_package_path(pkgname); 1105 calculate_tree_size(refProfilePath, &stats.codeSize); 1106 1107#if MEASURE_EXTERNAL 1108 auto extPath = create_data_media_package_path(uuid_, userId, pkgname, "data"); 1109 collectManualStats(extPath, &extStats); 1110 1111 auto mediaPath = create_data_media_package_path(uuid_, userId, pkgname, "media"); 1112 calculate_tree_size(mediaPath, &extStats.dataSize); 1113#endif 1114 } 1115 1116 int32_t sharedGid = multiuser_get_shared_gid(userId, appId); 1117 if (sharedGid != -1) { 1118 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1119 sharedGid, -1); 1120 } 1121 1122 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize, 1123 multiuser_get_uid(userId, appId), -1); 1124 } 1125 1126 std::vector<int64_t> ret; 1127 ret.push_back(stats.codeSize); 1128 ret.push_back(stats.dataSize); 1129 ret.push_back(stats.cacheSize); 1130 ret.push_back(extStats.codeSize); 1131 ret.push_back(extStats.dataSize); 1132 ret.push_back(extStats.cacheSize); 1133#if MEASURE_DEBUG 1134 LOG(DEBUG) << "Final result " << toString(ret); 1135#endif 1136 *_aidl_return = ret; 1137 return ok(); 1138} 1139 1140binder::Status InstalldNativeService::getUserSize(const std::unique_ptr<std::string>& uuid, 1141 int32_t userId, int32_t flags, const std::vector<int32_t>& appIds, 1142 std::vector<int64_t>* _aidl_return) { 1143 ENFORCE_UID(AID_SYSTEM); 1144 CHECK_ARGUMENT_UUID(uuid); 1145 1146 // When modifying this logic, always verify using tests: 1147 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetUserSize 1148 1149#if MEASURE_DEBUG 1150 LOG(INFO) << "Measuring user " << userId; 1151#endif 1152 1153 struct stats stats; 1154 struct stats extStats; 1155 memset(&stats, 0, sizeof(stats)); 1156 memset(&extStats, 0, sizeof(extStats)); 1157 1158 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1159 1160 auto obbPath = create_data_path(uuid_) + "/media/obb"; 1161 calculate_tree_size(obbPath, &extStats.codeSize); 1162 1163 if (flags & FLAG_USE_QUOTA) { 1164 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize, -1, -1, true); 1165 1166 auto cePath = create_data_user_ce_path(uuid_, userId); 1167 collectManualStatsForUser(cePath, &stats, true); 1168 1169 auto dePath = create_data_user_de_path(uuid_, userId); 1170 collectManualStatsForUser(dePath, &stats, true); 1171 1172 auto userProfilePath = create_data_user_profile_path(userId); 1173 calculate_tree_size(userProfilePath, &stats.dataSize, -1, -1, true); 1174 1175 auto refProfilePath = create_data_ref_profile_path(); 1176 calculate_tree_size(refProfilePath, &stats.codeSize, -1, -1, true); 1177 1178#if MEASURE_EXTERNAL 1179 // TODO: measure external storage paths 1180#endif 1181 1182 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1183 -1, -1, true); 1184 1185 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize, 1186 -1, -1, true); 1187 1188 auto device = findDeviceForUuid(uuid); 1189 for (auto appId : appIds) { 1190 if (appId >= AID_APP_START) { 1191 collectQuotaStats(device, userId, appId, &stats, &extStats); 1192#if MEASURE_DEBUG 1193 // Sleep to make sure we don't lose logs 1194 usleep(1); 1195#endif 1196 } 1197 } 1198 } else { 1199 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize); 1200 1201 auto cePath = create_data_user_ce_path(uuid_, userId); 1202 collectManualStatsForUser(cePath, &stats); 1203 1204 auto dePath = create_data_user_de_path(uuid_, userId); 1205 collectManualStatsForUser(dePath, &stats); 1206 1207 auto userProfilePath = create_data_user_profile_path(userId); 1208 calculate_tree_size(userProfilePath, &stats.dataSize); 1209 1210 auto refProfilePath = create_data_ref_profile_path(); 1211 calculate_tree_size(refProfilePath, &stats.codeSize); 1212 1213#if MEASURE_EXTERNAL 1214 // TODO: measure external storage paths 1215#endif 1216 1217 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize); 1218 1219 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize); 1220 } 1221 1222 std::vector<int64_t> ret; 1223 ret.push_back(stats.codeSize); 1224 ret.push_back(stats.dataSize); 1225 ret.push_back(stats.cacheSize); 1226 ret.push_back(extStats.codeSize); 1227 ret.push_back(extStats.dataSize); 1228 ret.push_back(extStats.cacheSize); 1229#if MEASURE_DEBUG 1230 LOG(DEBUG) << "Final result " << toString(ret); 1231#endif 1232 *_aidl_return = ret; 1233 return ok(); 1234} 1235 1236binder::Status InstalldNativeService::getExternalSize(const std::unique_ptr<std::string>& uuid, 1237 int32_t userId, int32_t flags, std::vector<int64_t>* _aidl_return) { 1238 ENFORCE_UID(AID_SYSTEM); 1239 CHECK_ARGUMENT_UUID(uuid); 1240 1241 // When modifying this logic, always verify using tests: 1242 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetExternalSize 1243 1244#if MEASURE_DEBUG 1245 LOG(INFO) << "Measuring external " << userId; 1246#endif 1247 1248 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1249 1250 int64_t totalSize = 0; 1251 int64_t audioSize = 0; 1252 int64_t videoSize = 0; 1253 int64_t imageSize = 0; 1254 1255 if (flags & FLAG_USE_QUOTA) { 1256 struct dqblk dq; 1257 1258 auto device = findDeviceForUuid(uuid); 1259 1260 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1261 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1262 reinterpret_cast<char*>(&dq)) != 0) { 1263 if (errno != ESRCH) { 1264 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1265 } 1266 } else { 1267#if MEASURE_DEBUG 1268 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1269#endif 1270 totalSize = dq.dqb_curspace; 1271 } 1272 1273 gid_t audioGid = multiuser_get_uid(userId, AID_MEDIA_AUDIO); 1274 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), audioGid, 1275 reinterpret_cast<char*>(&dq)) == 0) { 1276#if MEASURE_DEBUG 1277 LOG(DEBUG) << "quotactl() for GID " << audioGid << " " << dq.dqb_curspace; 1278#endif 1279 audioSize = dq.dqb_curspace; 1280 } 1281 gid_t videoGid = multiuser_get_uid(userId, AID_MEDIA_VIDEO); 1282 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), videoGid, 1283 reinterpret_cast<char*>(&dq)) == 0) { 1284#if MEASURE_DEBUG 1285 LOG(DEBUG) << "quotactl() for GID " << videoGid << " " << dq.dqb_curspace; 1286#endif 1287 videoSize = dq.dqb_curspace; 1288 } 1289 gid_t imageGid = multiuser_get_uid(userId, AID_MEDIA_IMAGE); 1290 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), imageGid, 1291 reinterpret_cast<char*>(&dq)) == 0) { 1292#if MEASURE_DEBUG 1293 LOG(DEBUG) << "quotactl() for GID " << imageGid << " " << dq.dqb_curspace; 1294#endif 1295 imageSize = dq.dqb_curspace; 1296 } 1297 } else { 1298 FTS *fts; 1299 FTSENT *p; 1300 auto path = create_data_media_path(uuid_, userId); 1301 char *argv[] = { (char*) path.c_str(), nullptr }; 1302 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 1303 return error("Failed to fts_open " + path); 1304 } 1305 while ((p = fts_read(fts)) != NULL) { 1306 char* ext; 1307 int64_t size = (p->fts_statp->st_blocks * 512); 1308 switch (p->fts_info) { 1309 case FTS_F: 1310 // Only categorize files not belonging to apps 1311 if (p->fts_statp->st_gid < AID_APP_START) { 1312 ext = strrchr(p->fts_name, '.'); 1313 if (ext != nullptr) { 1314 switch (MatchExtension(++ext)) { 1315 case AID_MEDIA_AUDIO: audioSize += size; break; 1316 case AID_MEDIA_VIDEO: videoSize += size; break; 1317 case AID_MEDIA_IMAGE: imageSize += size; break; 1318 } 1319 } 1320 } 1321 // Fall through to always count against total 1322 case FTS_D: 1323 case FTS_DEFAULT: 1324 case FTS_SL: 1325 case FTS_SLNONE: 1326 totalSize += size; 1327 break; 1328 } 1329 } 1330 fts_close(fts); 1331 } 1332 1333 std::vector<int64_t> ret; 1334 ret.push_back(totalSize); 1335 ret.push_back(audioSize); 1336 ret.push_back(videoSize); 1337 ret.push_back(imageSize); 1338#if MEASURE_DEBUG 1339 LOG(DEBUG) << "Final result " << toString(ret); 1340#endif 1341 *_aidl_return = ret; 1342 return ok(); 1343} 1344 1345// Dumps the contents of a profile file, using pkgname's dex files for pretty 1346// printing the result. 1347binder::Status InstalldNativeService::dumpProfiles(int32_t uid, const std::string& packageName, 1348 const std::string& codePaths, bool* _aidl_return) { 1349 ENFORCE_UID(AID_SYSTEM); 1350 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1351 1352 const char* pkgname = packageName.c_str(); 1353 const char* code_paths = codePaths.c_str(); 1354 1355 *_aidl_return = dump_profiles(uid, pkgname, code_paths); 1356 return ok(); 1357} 1358 1359// TODO: Consider returning error codes. 1360binder::Status InstalldNativeService::mergeProfiles(int32_t uid, const std::string& packageName, 1361 bool* _aidl_return) { 1362 ENFORCE_UID(AID_SYSTEM); 1363 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1364 1365 const char* pkgname = packageName.c_str(); 1366 *_aidl_return = analyse_profiles(uid, pkgname); 1367 return ok(); 1368} 1369 1370binder::Status InstalldNativeService::dexopt(const std::string& apkPath, int32_t uid, 1371 const std::unique_ptr<std::string>& packageName, const std::string& instructionSet, 1372 int32_t dexoptNeeded, const std::unique_ptr<std::string>& outputPath, int32_t dexFlags, 1373 const std::string& compilerFilter, const std::unique_ptr<std::string>& uuid, 1374 const std::unique_ptr<std::string>& sharedLibraries) { 1375 ENFORCE_UID(AID_SYSTEM); 1376 CHECK_ARGUMENT_UUID(uuid); 1377 if (packageName && *packageName != "*") { 1378 CHECK_ARGUMENT_PACKAGE_NAME(*packageName); 1379 } 1380 1381 const char* apk_path = apkPath.c_str(); 1382 const char* pkgname = packageName ? packageName->c_str() : "*"; 1383 const char* instruction_set = instructionSet.c_str(); 1384 const char* oat_dir = outputPath ? outputPath->c_str() : nullptr; 1385 const char* compiler_filter = compilerFilter.c_str(); 1386 const char* volume_uuid = uuid ? uuid->c_str() : nullptr; 1387 const char* shared_libraries = sharedLibraries ? sharedLibraries->c_str() : nullptr; 1388 1389 int res = android::installd::dexopt(apk_path, uid, pkgname, instruction_set, dexoptNeeded, 1390 oat_dir, dexFlags, compiler_filter, volume_uuid, shared_libraries); 1391 return res ? error(res, "Failed to dexopt") : ok(); 1392} 1393 1394binder::Status InstalldNativeService::markBootComplete(const std::string& instructionSet) { 1395 ENFORCE_UID(AID_SYSTEM); 1396 const char* instruction_set = instructionSet.c_str(); 1397 1398 char boot_marker_path[PKG_PATH_MAX]; 1399 sprintf(boot_marker_path, 1400 "%s/%s/%s/.booting", 1401 android_data_dir.path, 1402 DALVIK_CACHE, 1403 instruction_set); 1404 1405 ALOGV("mark_boot_complete : %s", boot_marker_path); 1406 if (unlink(boot_marker_path) != 0) { 1407 return error(StringPrintf("Failed to unlink %s", boot_marker_path)); 1408 } 1409 return ok(); 1410} 1411 1412void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid, 1413 struct stat* statbuf) 1414{ 1415 while (path[basepos] != 0) { 1416 if (path[basepos] == '/') { 1417 path[basepos] = 0; 1418 if (lstat(path, statbuf) < 0) { 1419 ALOGV("Making directory: %s\n", path); 1420 if (mkdir(path, mode) == 0) { 1421 chown(path, uid, gid); 1422 } else { 1423 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno)); 1424 } 1425 } 1426 path[basepos] = '/'; 1427 basepos++; 1428 } 1429 basepos++; 1430 } 1431} 1432 1433binder::Status InstalldNativeService::linkNativeLibraryDirectory( 1434 const std::unique_ptr<std::string>& uuid, const std::string& packageName, 1435 const std::string& nativeLibPath32, int32_t userId) { 1436 ENFORCE_UID(AID_SYSTEM); 1437 CHECK_ARGUMENT_UUID(uuid); 1438 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1439 1440 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1441 const char* pkgname = packageName.c_str(); 1442 const char* asecLibDir = nativeLibPath32.c_str(); 1443 struct stat s, libStat; 1444 binder::Status res = ok(); 1445 1446 auto _pkgdir = create_data_user_ce_package_path(uuid_, userId, pkgname); 1447 auto _libsymlink = _pkgdir + PKG_LIB_POSTFIX; 1448 1449 const char* pkgdir = _pkgdir.c_str(); 1450 const char* libsymlink = _libsymlink.c_str(); 1451 1452 if (stat(pkgdir, &s) < 0) { 1453 return error("Failed to stat " + _pkgdir); 1454 } 1455 1456 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) { 1457 return error("Failed to chown " + _pkgdir); 1458 } 1459 1460 if (chmod(pkgdir, 0700) < 0) { 1461 res = error("Failed to chmod " + _pkgdir); 1462 goto out; 1463 } 1464 1465 if (lstat(libsymlink, &libStat) < 0) { 1466 if (errno != ENOENT) { 1467 res = error("Failed to stat " + _libsymlink); 1468 goto out; 1469 } 1470 } else { 1471 if (S_ISDIR(libStat.st_mode)) { 1472 if (delete_dir_contents(libsymlink, 1, NULL) < 0) { 1473 res = error("Failed to delete " + _libsymlink); 1474 goto out; 1475 } 1476 } else if (S_ISLNK(libStat.st_mode)) { 1477 if (unlink(libsymlink) < 0) { 1478 res = error("Failed to unlink " + _libsymlink); 1479 goto out; 1480 } 1481 } 1482 } 1483 1484 if (symlink(asecLibDir, libsymlink) < 0) { 1485 res = error("Failed to symlink " + _libsymlink + " to " + nativeLibPath32); 1486 goto out; 1487 } 1488 1489out: 1490 if (chmod(pkgdir, s.st_mode) < 0) { 1491 auto msg = "Failed to cleanup chmod " + _pkgdir; 1492 if (res.isOk()) { 1493 res = error(msg); 1494 } else { 1495 PLOG(ERROR) << msg; 1496 } 1497 } 1498 1499 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) { 1500 auto msg = "Failed to cleanup chown " + _pkgdir; 1501 if (res.isOk()) { 1502 res = error(msg); 1503 } else { 1504 PLOG(ERROR) << msg; 1505 } 1506 } 1507 1508 return res; 1509} 1510 1511static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd) 1512{ 1513 static const char *IDMAP_BIN = "/system/bin/idmap"; 1514 static const size_t MAX_INT_LEN = 32; 1515 char idmap_str[MAX_INT_LEN]; 1516 1517 snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd); 1518 1519 execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL); 1520 ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno)); 1521} 1522 1523// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix) 1524// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap 1525static int flatten_path(const char *prefix, const char *suffix, 1526 const char *overlay_path, char *idmap_path, size_t N) 1527{ 1528 if (overlay_path == NULL || idmap_path == NULL) { 1529 return -1; 1530 } 1531 const size_t len_overlay_path = strlen(overlay_path); 1532 // will access overlay_path + 1 further below; requires absolute path 1533 if (len_overlay_path < 2 || *overlay_path != '/') { 1534 return -1; 1535 } 1536 const size_t len_idmap_root = strlen(prefix); 1537 const size_t len_suffix = strlen(suffix); 1538 if (SIZE_MAX - len_idmap_root < len_overlay_path || 1539 SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) { 1540 // additions below would cause overflow 1541 return -1; 1542 } 1543 if (N < len_idmap_root + len_overlay_path + len_suffix) { 1544 return -1; 1545 } 1546 memset(idmap_path, 0, N); 1547 snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix); 1548 char *ch = idmap_path + len_idmap_root; 1549 while (*ch != '\0') { 1550 if (*ch == '/') { 1551 *ch = '@'; 1552 } 1553 ++ch; 1554 } 1555 return 0; 1556} 1557 1558binder::Status InstalldNativeService::idmap(const std::string& targetApkPath, 1559 const std::string& overlayApkPath, int32_t uid) { 1560 ENFORCE_UID(AID_SYSTEM); 1561 const char* target_apk = targetApkPath.c_str(); 1562 const char* overlay_apk = overlayApkPath.c_str(); 1563 ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid); 1564 1565 int idmap_fd = -1; 1566 char idmap_path[PATH_MAX]; 1567 1568 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1569 idmap_path, sizeof(idmap_path)) == -1) { 1570 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1571 goto fail; 1572 } 1573 1574 unlink(idmap_path); 1575 idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644); 1576 if (idmap_fd < 0) { 1577 ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno)); 1578 goto fail; 1579 } 1580 if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) { 1581 ALOGE("idmap cannot chown '%s'\n", idmap_path); 1582 goto fail; 1583 } 1584 if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { 1585 ALOGE("idmap cannot chmod '%s'\n", idmap_path); 1586 goto fail; 1587 } 1588 1589 pid_t pid; 1590 pid = fork(); 1591 if (pid == 0) { 1592 /* child -- drop privileges before continuing */ 1593 if (setgid(uid) != 0) { 1594 ALOGE("setgid(%d) failed during idmap\n", uid); 1595 exit(1); 1596 } 1597 if (setuid(uid) != 0) { 1598 ALOGE("setuid(%d) failed during idmap\n", uid); 1599 exit(1); 1600 } 1601 if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) { 1602 ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno)); 1603 exit(1); 1604 } 1605 1606 run_idmap(target_apk, overlay_apk, idmap_fd); 1607 exit(1); /* only if exec call to idmap failed */ 1608 } else { 1609 int status = wait_child(pid); 1610 if (status != 0) { 1611 ALOGE("idmap failed, status=0x%04x\n", status); 1612 goto fail; 1613 } 1614 } 1615 1616 close(idmap_fd); 1617 return ok(); 1618fail: 1619 if (idmap_fd >= 0) { 1620 close(idmap_fd); 1621 unlink(idmap_path); 1622 } 1623 return error(); 1624} 1625 1626binder::Status InstalldNativeService::restoreconAppData(const std::unique_ptr<std::string>& uuid, 1627 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 1628 const std::string& seInfo) { 1629 ENFORCE_UID(AID_SYSTEM); 1630 CHECK_ARGUMENT_UUID(uuid); 1631 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1632 1633 binder::Status res = ok(); 1634 1635 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here. 1636 unsigned int seflags = SELINUX_ANDROID_RESTORECON_RECURSE; 1637 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1638 const char* pkgName = packageName.c_str(); 1639 const char* seinfo = seInfo.c_str(); 1640 1641 uid_t uid = multiuser_get_uid(userId, appId); 1642 if (flags & FLAG_STORAGE_CE) { 1643 auto path = create_data_user_ce_package_path(uuid_, userId, pkgName); 1644 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 1645 res = error("restorecon failed for " + path); 1646 } 1647 } 1648 if (flags & FLAG_STORAGE_DE) { 1649 auto path = create_data_user_de_package_path(uuid_, userId, pkgName); 1650 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 1651 res = error("restorecon failed for " + path); 1652 } 1653 } 1654 return res; 1655} 1656 1657binder::Status InstalldNativeService::createOatDir(const std::string& oatDir, 1658 const std::string& instructionSet) { 1659 ENFORCE_UID(AID_SYSTEM); 1660 const char* oat_dir = oatDir.c_str(); 1661 const char* instruction_set = instructionSet.c_str(); 1662 char oat_instr_dir[PKG_PATH_MAX]; 1663 1664 if (validate_apk_path(oat_dir)) { 1665 return error("Invalid path " + oatDir); 1666 } 1667 if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1668 return error("Failed to prepare " + oatDir); 1669 } 1670 if (selinux_android_restorecon(oat_dir, 0)) { 1671 return error("Failed to restorecon " + oatDir); 1672 } 1673 snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set); 1674 if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1675 return error(StringPrintf("Failed to prepare %s", oat_instr_dir)); 1676 } 1677 return ok(); 1678} 1679 1680binder::Status InstalldNativeService::rmPackageDir(const std::string& packageDir) { 1681 ENFORCE_UID(AID_SYSTEM); 1682 if (validate_apk_path(packageDir.c_str())) { 1683 return error("Invalid path " + packageDir); 1684 } 1685 if (delete_dir_contents_and_dir(packageDir) != 0) { 1686 return error("Failed to delete " + packageDir); 1687 } 1688 return ok(); 1689} 1690 1691binder::Status InstalldNativeService::linkFile(const std::string& relativePath, 1692 const std::string& fromBase, const std::string& toBase) { 1693 ENFORCE_UID(AID_SYSTEM); 1694 const char* relative_path = relativePath.c_str(); 1695 const char* from_base = fromBase.c_str(); 1696 const char* to_base = toBase.c_str(); 1697 char from_path[PKG_PATH_MAX]; 1698 char to_path[PKG_PATH_MAX]; 1699 snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path); 1700 snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path); 1701 1702 if (validate_apk_path_subdirs(from_path)) { 1703 return error(StringPrintf("Invalid from path %s", from_path)); 1704 } 1705 1706 if (validate_apk_path_subdirs(to_path)) { 1707 return error(StringPrintf("Invalid to path %s", to_path)); 1708 } 1709 1710 if (link(from_path, to_path) < 0) { 1711 return error(StringPrintf("Failed to link from %s to %s", from_path, to_path)); 1712 } 1713 1714 return ok(); 1715} 1716 1717binder::Status InstalldNativeService::moveAb(const std::string& apkPath, 1718 const std::string& instructionSet, const std::string& outputPath) { 1719 ENFORCE_UID(AID_SYSTEM); 1720 1721 const char* apk_path = apkPath.c_str(); 1722 const char* instruction_set = instructionSet.c_str(); 1723 const char* oat_dir = outputPath.c_str(); 1724 1725 bool success = move_ab(apk_path, instruction_set, oat_dir); 1726 return success ? ok() : error(); 1727} 1728 1729binder::Status InstalldNativeService::deleteOdex(const std::string& apkPath, 1730 const std::string& instructionSet, const std::string& outputPath) { 1731 ENFORCE_UID(AID_SYSTEM); 1732 1733 const char* apk_path = apkPath.c_str(); 1734 const char* instruction_set = instructionSet.c_str(); 1735 const char* oat_dir = outputPath.c_str(); 1736 1737 bool res = delete_odex(apk_path, instruction_set, oat_dir); 1738 return res ? ok() : error(); 1739} 1740 1741} // namespace installd 1742} // namespace android 1743