InstalldNativeService.cpp revision 78ef6e13966b830d111f18702948d77cfa2634a7
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/log.h> // TODO: Move everything to base/logging. 43#include <cutils/properties.h> 44#include <cutils/sched_policy.h> 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 int MIN_RESTRICTED_HOME_SDK_VERSION = 24; // > M 71 72static constexpr const char* PKG_LIB_POSTFIX = "/lib"; 73static constexpr const char* CACHE_DIR_POSTFIX = "/cache"; 74static constexpr const char* CODE_CACHE_DIR_POSTFIX = "/code_cache"; 75 76static constexpr const char* IDMAP_PREFIX = "/data/resource-cache/"; 77static constexpr const char* IDMAP_SUFFIX = "@idmap"; 78 79// NOTE: keep in sync with StorageManager 80static constexpr int FLAG_STORAGE_DE = 1 << 0; 81static constexpr int FLAG_STORAGE_CE = 1 << 1; 82 83// NOTE: keep in sync with Installer 84static constexpr int FLAG_CLEAR_CACHE_ONLY = 1 << 8; 85static constexpr int FLAG_CLEAR_CODE_CACHE_ONLY = 1 << 9; 86static constexpr int FLAG_USE_QUOTA = 1 << 12; 87 88namespace { 89 90constexpr const char* kDump = "android.permission.DUMP"; 91 92static binder::Status ok() { 93 return binder::Status::ok(); 94} 95 96static binder::Status exception(uint32_t code, const std::string& msg) { 97 return binder::Status::fromExceptionCode(code, String8(msg.c_str())); 98} 99 100static binder::Status error() { 101 return binder::Status::fromServiceSpecificError(errno); 102} 103 104static binder::Status error(const std::string& msg) { 105 PLOG(ERROR) << msg; 106 return binder::Status::fromServiceSpecificError(errno, String8(msg.c_str())); 107} 108 109static binder::Status error(uint32_t code, const std::string& msg) { 110 LOG(ERROR) << msg << " (" << code << ")"; 111 return binder::Status::fromServiceSpecificError(code, String8(msg.c_str())); 112} 113 114binder::Status checkPermission(const char* permission) { 115 pid_t pid; 116 uid_t uid; 117 118 if (checkCallingPermission(String16(permission), reinterpret_cast<int32_t*>(&pid), 119 reinterpret_cast<int32_t*>(&uid))) { 120 return ok(); 121 } else { 122 return exception(binder::Status::EX_SECURITY, 123 StringPrintf("UID %d / PID %d lacks permission %s", uid, pid, permission)); 124 } 125} 126 127binder::Status checkUid(uid_t expectedUid) { 128 uid_t uid = IPCThreadState::self()->getCallingUid(); 129 if (uid == expectedUid || uid == AID_ROOT) { 130 return ok(); 131 } else { 132 return exception(binder::Status::EX_SECURITY, 133 StringPrintf("UID %d is not expected UID %d", uid, expectedUid)); 134 } 135} 136 137binder::Status checkArgumentUuid(const std::unique_ptr<std::string>& uuid) { 138 if (!uuid || is_valid_filename(*uuid)) { 139 return ok(); 140 } else { 141 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 142 StringPrintf("UUID %s is malformed", uuid->c_str())); 143 } 144} 145 146binder::Status checkArgumentPackageName(const std::string& packageName) { 147 if (is_valid_package_name(packageName.c_str())) { 148 return ok(); 149 } else { 150 return exception(binder::Status::EX_ILLEGAL_ARGUMENT, 151 StringPrintf("Package name %s is malformed", packageName.c_str())); 152 } 153} 154 155#define ENFORCE_UID(uid) { \ 156 binder::Status status = checkUid((uid)); \ 157 if (!status.isOk()) { \ 158 return status; \ 159 } \ 160} 161 162#define CHECK_ARGUMENT_UUID(uuid) { \ 163 binder::Status status = checkArgumentUuid((uuid)); \ 164 if (!status.isOk()) { \ 165 return status; \ 166 } \ 167} 168 169#define CHECK_ARGUMENT_PACKAGE_NAME(packageName) { \ 170 binder::Status status = \ 171 checkArgumentPackageName((packageName)); \ 172 if (!status.isOk()) { \ 173 return status; \ 174 } \ 175} 176 177} // namespace 178 179status_t InstalldNativeService::start() { 180 IPCThreadState::self()->disableBackgroundScheduling(true); 181 status_t ret = BinderService<InstalldNativeService>::publish(); 182 if (ret != android::OK) { 183 return ret; 184 } 185 sp<ProcessState> ps(ProcessState::self()); 186 ps->startThreadPool(); 187 ps->giveThreadPoolName(); 188 return android::OK; 189} 190 191status_t InstalldNativeService::dump(int fd, const Vector<String16> & /* args */) { 192 const binder::Status dump_permission = checkPermission(kDump); 193 if (!dump_permission.isOk()) { 194 const String8 msg(dump_permission.toString8()); 195 write(fd, msg.string(), msg.size()); 196 return PERMISSION_DENIED; 197 } 198 199 std::string msg = "installd is happy\n"; 200 write(fd, msg.c_str(), strlen(msg.c_str())); 201 return NO_ERROR; 202} 203 204/** 205 * Perform restorecon of the given path, but only perform recursive restorecon 206 * if the label of that top-level file actually changed. This can save us 207 * significant time by avoiding no-op traversals of large filesystem trees. 208 */ 209static int restorecon_app_data_lazy(const std::string& path, const std::string& seInfo, uid_t uid, 210 bool existing) { 211 int res = 0; 212 char* before = nullptr; 213 char* after = nullptr; 214 215 // Note that SELINUX_ANDROID_RESTORECON_DATADATA flag is set by 216 // libselinux. Not needed here. 217 218 if (lgetfilecon(path.c_str(), &before) < 0) { 219 PLOG(ERROR) << "Failed before getfilecon for " << path; 220 goto fail; 221 } 222 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 0) < 0) { 223 PLOG(ERROR) << "Failed top-level restorecon for " << path; 224 goto fail; 225 } 226 if (lgetfilecon(path.c_str(), &after) < 0) { 227 PLOG(ERROR) << "Failed after getfilecon for " << path; 228 goto fail; 229 } 230 231 // If the initial top-level restorecon above changed the label, then go 232 // back and restorecon everything recursively 233 if (strcmp(before, after)) { 234 if (existing) { 235 LOG(DEBUG) << "Detected label change from " << before << " to " << after << " at " 236 << path << "; running recursive restorecon"; 237 } 238 if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 239 SELINUX_ANDROID_RESTORECON_RECURSE) < 0) { 240 PLOG(ERROR) << "Failed recursive restorecon for " << path; 241 goto fail; 242 } 243 } 244 245 goto done; 246fail: 247 res = -1; 248done: 249 free(before); 250 free(after); 251 return res; 252} 253 254static int restorecon_app_data_lazy(const std::string& parent, const char* name, 255 const std::string& seInfo, uid_t uid, bool existing) { 256 return restorecon_app_data_lazy(StringPrintf("%s/%s", parent.c_str(), name), seInfo, uid, 257 existing); 258} 259 260static int prepare_app_dir(const std::string& path, mode_t target_mode, uid_t uid) { 261 if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, uid) != 0) { 262 PLOG(ERROR) << "Failed to prepare " << path; 263 return -1; 264 } 265 return 0; 266} 267 268/** 269 * Prepare an app cache directory, which offers to fix-up the GID and 270 * directory mode flags during a platform upgrade. 271 */ 272static int prepare_app_cache_dir(const std::string& parent, const char* name, mode_t target_mode, 273 uid_t uid, gid_t gid) { 274 auto path = StringPrintf("%s/%s", parent.c_str(), name); 275 struct stat st; 276 if (stat(path.c_str(), &st) != 0) { 277 if (errno == ENOENT) { 278 // This is fine, just create it 279 if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, gid) != 0) { 280 PLOG(ERROR) << "Failed to prepare " << path; 281 return -1; 282 } else { 283 return 0; 284 } 285 } else { 286 PLOG(ERROR) << "Failed to stat " << path; 287 return -1; 288 } 289 } 290 291 if (st.st_uid != uid) { 292 // Mismatched UID is real trouble; we can't recover 293 LOG(ERROR) << "Mismatched UID at " << path << ": found " << st.st_uid 294 << " but expected " << uid; 295 return -1; 296 } else if (st.st_gid == gid && st.st_mode == target_mode) { 297 // Everything looks good! 298 return 0; 299 } 300 301 // Directory is owned correctly, but GID or mode mismatch means it's 302 // probably a platform upgrade so we need to fix them 303 FTS *fts; 304 FTSENT *p; 305 char *argv[] = { (char*) path.c_str(), nullptr }; 306 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 307 PLOG(ERROR) << "Failed to fts_open " << path; 308 return -1; 309 } 310 while ((p = fts_read(fts)) != NULL) { 311 switch (p->fts_info) { 312 case FTS_DP: 313 if (chmod(p->fts_accpath, target_mode) != 0) { 314 PLOG(WARNING) << "Failed to chmod " << p->fts_path; 315 } 316 // Intentional fall through to also set GID 317 case FTS_F: 318 if (chown(p->fts_accpath, -1, gid) != 0) { 319 PLOG(WARNING) << "Failed to chown " << p->fts_path; 320 } 321 break; 322 case FTS_SL: 323 case FTS_SLNONE: 324 if (lchown(p->fts_accpath, -1, gid) != 0) { 325 PLOG(WARNING) << "Failed to chown " << p->fts_path; 326 } 327 break; 328 } 329 } 330 fts_close(fts); 331 return 0; 332} 333 334binder::Status InstalldNativeService::createAppData(const std::unique_ptr<std::string>& uuid, 335 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 336 const std::string& seInfo, int32_t targetSdkVersion, int64_t* _aidl_return) { 337 ENFORCE_UID(AID_SYSTEM); 338 CHECK_ARGUMENT_UUID(uuid); 339 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 340 341 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 342 const char* pkgname = packageName.c_str(); 343 344 // Assume invalid inode unless filled in below 345 if (_aidl_return != nullptr) *_aidl_return = -1; 346 347 uid_t uid = multiuser_get_uid(userId, appId); 348 gid_t cacheGid = multiuser_get_cache_gid(userId, appId); 349 mode_t targetMode = targetSdkVersion >= MIN_RESTRICTED_HOME_SDK_VERSION ? 0700 : 0751; 350 351 if (flags & FLAG_STORAGE_CE) { 352 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname); 353 bool existing = (access(path.c_str(), F_OK) == 0); 354 355 if (prepare_app_dir(path, targetMode, uid) || 356 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 357 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 358 return error("Failed to prepare " + path); 359 } 360 361 // Consider restorecon over contents if label changed 362 if (restorecon_app_data_lazy(path, seInfo, uid, existing) || 363 restorecon_app_data_lazy(path, "cache", seInfo, uid, existing) || 364 restorecon_app_data_lazy(path, "code_cache", seInfo, uid, existing)) { 365 return error("Failed to restorecon " + path); 366 } 367 368 // Remember inode numbers of cache directories so that we can clear 369 // contents while CE storage is locked 370 if (write_path_inode(path, "cache", kXattrInodeCache) || 371 write_path_inode(path, "code_cache", kXattrInodeCodeCache)) { 372 return error("Failed to write_path_inode for " + path); 373 } 374 375 // And return the CE inode of the top-level data directory so we can 376 // clear contents while CE storage is locked 377 if ((_aidl_return != nullptr) 378 && get_path_inode(path, reinterpret_cast<ino_t*>(_aidl_return)) != 0) { 379 return error("Failed to get_path_inode for " + path); 380 } 381 } 382 if (flags & FLAG_STORAGE_DE) { 383 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 384 bool existing = (access(path.c_str(), F_OK) == 0); 385 386 if (prepare_app_dir(path, targetMode, uid) || 387 prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid) || 388 prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid)) { 389 return error("Failed to prepare " + path); 390 } 391 392 // Consider restorecon over contents if label changed 393 if (restorecon_app_data_lazy(path, seInfo, uid, existing)) { 394 return error("Failed to restorecon " + path); 395 } 396 397 if (property_get_bool("dalvik.vm.usejitprofiles", false)) { 398 const std::string profile_path = create_data_user_profile_package_path(userId, pkgname); 399 // read-write-execute only for the app user. 400 if (fs_prepare_dir_strict(profile_path.c_str(), 0700, uid, uid) != 0) { 401 return error("Failed to prepare " + profile_path); 402 } 403 std::string profile_file = create_primary_profile(profile_path); 404 // read-write only for the app user. 405 if (fs_prepare_file_strict(profile_file.c_str(), 0600, uid, uid) != 0) { 406 return error("Failed to prepare " + profile_path); 407 } 408 const std::string ref_profile_path = create_data_ref_profile_package_path(pkgname); 409 // dex2oat/profman runs under the shared app gid and it needs to read/write reference 410 // profiles. 411 int shared_app_gid = multiuser_get_shared_gid(0, appId); 412 if ((shared_app_gid != -1) && fs_prepare_dir_strict( 413 ref_profile_path.c_str(), 0700, shared_app_gid, shared_app_gid) != 0) { 414 return error("Failed to prepare " + ref_profile_path); 415 } 416 } 417 } 418 return ok(); 419} 420 421binder::Status InstalldNativeService::migrateAppData(const std::unique_ptr<std::string>& uuid, 422 const std::string& packageName, int32_t userId, int32_t flags) { 423 ENFORCE_UID(AID_SYSTEM); 424 CHECK_ARGUMENT_UUID(uuid); 425 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 426 427 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 428 const char* pkgname = packageName.c_str(); 429 430 // This method only exists to upgrade system apps that have requested 431 // forceDeviceEncrypted, so their default storage always lives in a 432 // consistent location. This only works on non-FBE devices, since we 433 // never want to risk exposing data on a device with real CE/DE storage. 434 435 auto ce_path = create_data_user_ce_package_path(uuid_, userId, pkgname); 436 auto de_path = create_data_user_de_package_path(uuid_, userId, pkgname); 437 438 // If neither directory is marked as default, assume CE is default 439 if (getxattr(ce_path.c_str(), kXattrDefault, nullptr, 0) == -1 440 && getxattr(de_path.c_str(), kXattrDefault, nullptr, 0) == -1) { 441 if (setxattr(ce_path.c_str(), kXattrDefault, nullptr, 0, 0) != 0) { 442 return error("Failed to mark default storage " + ce_path); 443 } 444 } 445 446 // Migrate default data location if needed 447 auto target = (flags & FLAG_STORAGE_DE) ? de_path : ce_path; 448 auto source = (flags & FLAG_STORAGE_DE) ? ce_path : de_path; 449 450 if (getxattr(target.c_str(), kXattrDefault, nullptr, 0) == -1) { 451 LOG(WARNING) << "Requested default storage " << target 452 << " is not active; migrating from " << source; 453 if (delete_dir_contents_and_dir(target) != 0) { 454 return error("Failed to delete " + target); 455 } 456 if (rename(source.c_str(), target.c_str()) != 0) { 457 return error("Failed to rename " + source + " to " + target); 458 } 459 } 460 461 return ok(); 462} 463 464 465binder::Status InstalldNativeService::clearAppProfiles(const std::string& packageName) { 466 ENFORCE_UID(AID_SYSTEM); 467 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 468 469 const char* pkgname = packageName.c_str(); 470 binder::Status res = ok(); 471 if (!clear_reference_profile(pkgname)) { 472 res = error("Failed to clear reference profile for " + packageName); 473 } 474 if (!clear_current_profiles(pkgname)) { 475 res = error("Failed to clear current profiles for " + packageName); 476 } 477 return res; 478} 479 480binder::Status InstalldNativeService::clearAppData(const std::unique_ptr<std::string>& uuid, 481 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 482 ENFORCE_UID(AID_SYSTEM); 483 CHECK_ARGUMENT_UUID(uuid); 484 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 485 486 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 487 const char* pkgname = packageName.c_str(); 488 489 binder::Status res = ok(); 490 if (flags & FLAG_STORAGE_CE) { 491 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 492 if (flags & FLAG_CLEAR_CACHE_ONLY) { 493 path = read_path_inode(path, "cache", kXattrInodeCache); 494 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 495 path = read_path_inode(path, "code_cache", kXattrInodeCodeCache); 496 } 497 if (access(path.c_str(), F_OK) == 0) { 498 if (delete_dir_contents(path) != 0) { 499 res = error("Failed to delete contents of " + path); 500 } 501 } 502 } 503 if (flags & FLAG_STORAGE_DE) { 504 std::string suffix = ""; 505 bool only_cache = false; 506 if (flags & FLAG_CLEAR_CACHE_ONLY) { 507 suffix = CACHE_DIR_POSTFIX; 508 only_cache = true; 509 } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { 510 suffix = CODE_CACHE_DIR_POSTFIX; 511 only_cache = true; 512 } 513 514 auto path = create_data_user_de_package_path(uuid_, userId, pkgname) + suffix; 515 if (access(path.c_str(), F_OK) == 0) { 516 if (delete_dir_contents(path) != 0) { 517 res = error("Failed to delete contents of " + path); 518 } 519 } 520 if (!only_cache) { 521 if (!clear_current_profile(pkgname, userId)) { 522 res = error("Failed to clear current profile for " + packageName); 523 } 524 } 525 } 526 return res; 527} 528 529static int destroy_app_reference_profile(const char *pkgname) { 530 return delete_dir_contents_and_dir( 531 create_data_ref_profile_package_path(pkgname), 532 /*ignore_if_missing*/ true); 533} 534 535static int destroy_app_current_profiles(const char *pkgname, userid_t userid) { 536 return delete_dir_contents_and_dir( 537 create_data_user_profile_package_path(userid, pkgname), 538 /*ignore_if_missing*/ true); 539} 540 541binder::Status InstalldNativeService::destroyAppProfiles(const std::string& packageName) { 542 ENFORCE_UID(AID_SYSTEM); 543 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 544 545 const char* pkgname = packageName.c_str(); 546 binder::Status res = ok(); 547 std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr); 548 for (auto user : users) { 549 if (destroy_app_current_profiles(pkgname, user) != 0) { 550 res = error("Failed to destroy current profiles for " + packageName); 551 } 552 } 553 if (destroy_app_reference_profile(pkgname) != 0) { 554 res = error("Failed to destroy reference profile for " + packageName); 555 } 556 return res; 557} 558 559binder::Status InstalldNativeService::destroyAppData(const std::unique_ptr<std::string>& uuid, 560 const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { 561 ENFORCE_UID(AID_SYSTEM); 562 CHECK_ARGUMENT_UUID(uuid); 563 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 564 565 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 566 const char* pkgname = packageName.c_str(); 567 568 binder::Status res = ok(); 569 if (flags & FLAG_STORAGE_CE) { 570 auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); 571 if (delete_dir_contents_and_dir(path) != 0) { 572 res = error("Failed to delete " + path); 573 } 574 } 575 if (flags & FLAG_STORAGE_DE) { 576 auto path = create_data_user_de_package_path(uuid_, userId, pkgname); 577 if (delete_dir_contents_and_dir(path) != 0) { 578 res = error("Failed to delete " + path); 579 } 580 destroy_app_current_profiles(pkgname, userId); 581 // TODO(calin): If the package is still installed by other users it's probably 582 // beneficial to keep the reference profile around. 583 // Verify if it's ok to do that. 584 destroy_app_reference_profile(pkgname); 585 } 586 return res; 587} 588 589binder::Status InstalldNativeService::moveCompleteApp(const std::unique_ptr<std::string>& fromUuid, 590 const std::unique_ptr<std::string>& toUuid, const std::string& packageName, 591 const std::string& dataAppName, int32_t appId, const std::string& seInfo, 592 int32_t targetSdkVersion) { 593 ENFORCE_UID(AID_SYSTEM); 594 CHECK_ARGUMENT_UUID(fromUuid); 595 CHECK_ARGUMENT_UUID(toUuid); 596 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 597 598 const char* from_uuid = fromUuid ? fromUuid->c_str() : nullptr; 599 const char* to_uuid = toUuid ? toUuid->c_str() : nullptr; 600 const char* package_name = packageName.c_str(); 601 const char* data_app_name = dataAppName.c_str(); 602 603 binder::Status res = ok(); 604 std::vector<userid_t> users = get_known_users(from_uuid); 605 606 // Copy app 607 { 608 auto from = create_data_app_package_path(from_uuid, data_app_name); 609 auto to = create_data_app_package_path(to_uuid, data_app_name); 610 auto to_parent = create_data_app_path(to_uuid); 611 612 char *argv[] = { 613 (char*) kCpPath, 614 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 615 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 616 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 617 (char*) "-P", /* Do not follow symlinks [default] */ 618 (char*) "-d", /* don't dereference symlinks */ 619 (char*) from.c_str(), 620 (char*) to_parent.c_str() 621 }; 622 623 LOG(DEBUG) << "Copying " << from << " to " << to; 624 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 625 if (rc != 0) { 626 res = error(rc, "Failed copying " + from + " to " + to); 627 goto fail; 628 } 629 630 if (selinux_android_restorecon(to.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) { 631 res = error("Failed to restorecon " + to); 632 goto fail; 633 } 634 } 635 636 // Copy private data for all known users 637 for (auto user : users) { 638 639 // Data source may not exist for all users; that's okay 640 auto from_ce = create_data_user_ce_package_path(from_uuid, user, package_name); 641 if (access(from_ce.c_str(), F_OK) != 0) { 642 LOG(INFO) << "Missing source " << from_ce; 643 continue; 644 } 645 646 if (!createAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, appId, 647 seInfo, targetSdkVersion, nullptr).isOk()) { 648 res = error("Failed to create package target"); 649 goto fail; 650 } 651 652 char *argv[] = { 653 (char*) kCpPath, 654 (char*) "-F", /* delete any existing destination file first (--remove-destination) */ 655 (char*) "-p", /* preserve timestamps, ownership, and permissions */ 656 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ 657 (char*) "-P", /* Do not follow symlinks [default] */ 658 (char*) "-d", /* don't dereference symlinks */ 659 nullptr, 660 nullptr 661 }; 662 663 { 664 auto from = create_data_user_de_package_path(from_uuid, user, package_name); 665 auto to = create_data_user_de_path(to_uuid, user); 666 argv[6] = (char*) from.c_str(); 667 argv[7] = (char*) to.c_str(); 668 669 LOG(DEBUG) << "Copying " << from << " to " << to; 670 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 671 if (rc != 0) { 672 res = error(rc, "Failed copying " + from + " to " + to); 673 goto fail; 674 } 675 } 676 { 677 auto from = create_data_user_ce_package_path(from_uuid, user, package_name); 678 auto to = create_data_user_ce_path(to_uuid, user); 679 argv[6] = (char*) from.c_str(); 680 argv[7] = (char*) to.c_str(); 681 682 LOG(DEBUG) << "Copying " << from << " to " << to; 683 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); 684 if (rc != 0) { 685 res = error(rc, "Failed copying " + from + " to " + to); 686 goto fail; 687 } 688 } 689 690 if (!restoreconAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, 691 appId, seInfo).isOk()) { 692 res = error("Failed to restorecon"); 693 goto fail; 694 } 695 } 696 697 // We let the framework scan the new location and persist that before 698 // deleting the data in the old location; this ordering ensures that 699 // we can recover from things like battery pulls. 700 return ok(); 701 702fail: 703 // Nuke everything we might have already copied 704 { 705 auto to = create_data_app_package_path(to_uuid, data_app_name); 706 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 707 LOG(WARNING) << "Failed to rollback " << to; 708 } 709 } 710 for (auto user : users) { 711 { 712 auto to = create_data_user_de_package_path(to_uuid, user, package_name); 713 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 714 LOG(WARNING) << "Failed to rollback " << to; 715 } 716 } 717 { 718 auto to = create_data_user_ce_package_path(to_uuid, user, package_name); 719 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { 720 LOG(WARNING) << "Failed to rollback " << to; 721 } 722 } 723 } 724 return res; 725} 726 727binder::Status InstalldNativeService::createUserData(const std::unique_ptr<std::string>& uuid, 728 int32_t userId, int32_t userSerial ATTRIBUTE_UNUSED, int32_t flags) { 729 ENFORCE_UID(AID_SYSTEM); 730 CHECK_ARGUMENT_UUID(uuid); 731 732 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 733 if (flags & FLAG_STORAGE_DE) { 734 if (uuid_ == nullptr) { 735 if (ensure_config_user_dirs(userId) != 0) { 736 return error(StringPrintf("Failed to ensure dirs for %d", userId)); 737 } 738 } 739 } 740 return ok(); 741} 742 743binder::Status InstalldNativeService::destroyUserData(const std::unique_ptr<std::string>& uuid, 744 int32_t userId, int32_t flags) { 745 ENFORCE_UID(AID_SYSTEM); 746 CHECK_ARGUMENT_UUID(uuid); 747 748 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 749 binder::Status res = ok(); 750 if (flags & FLAG_STORAGE_DE) { 751 auto path = create_data_user_de_path(uuid_, userId); 752 if (delete_dir_contents_and_dir(path, true) != 0) { 753 res = error("Failed to delete " + path); 754 } 755 if (uuid_ == nullptr) { 756 path = create_data_misc_legacy_path(userId); 757 if (delete_dir_contents_and_dir(path, true) != 0) { 758 res = error("Failed to delete " + path); 759 } 760 path = create_data_user_profile_path(userId); 761 if (delete_dir_contents_and_dir(path, true) != 0) { 762 res = error("Failed to delete " + path); 763 } 764 } 765 } 766 if (flags & FLAG_STORAGE_CE) { 767 auto path = create_data_user_ce_path(uuid_, userId); 768 if (delete_dir_contents_and_dir(path, true) != 0) { 769 res = error("Failed to delete " + path); 770 } 771 path = create_data_media_path(uuid_, userId); 772 if (delete_dir_contents_and_dir(path, true) != 0) { 773 res = error("Failed to delete " + path); 774 } 775 } 776 return res; 777} 778 779/* Try to ensure free_size bytes of storage are available. 780 * Returns 0 on success. 781 * This is rather simple-minded because doing a full LRU would 782 * be potentially memory-intensive, and without atime it would 783 * also require that apps constantly modify file metadata even 784 * when just reading from the cache, which is pretty awful. 785 */ 786binder::Status InstalldNativeService::freeCache(const std::unique_ptr<std::string>& uuid, 787 int64_t freeStorageSize) { 788 ENFORCE_UID(AID_SYSTEM); 789 CHECK_ARGUMENT_UUID(uuid); 790 791 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 792 cache_t* cache; 793 int64_t avail; 794 795 auto data_path = create_data_path(uuid_); 796 797 avail = data_disk_free(data_path); 798 if (avail < 0) { 799 return error("Failed to determine free space for " + data_path); 800 } 801 802 ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", freeStorageSize, avail); 803 if (avail >= freeStorageSize) { 804 return ok(); 805 } 806 807 cache = start_cache_collection(); 808 809 auto users = get_known_users(uuid_); 810 for (auto user : users) { 811 add_cache_files(cache, create_data_user_ce_path(uuid_, user)); 812 add_cache_files(cache, create_data_user_de_path(uuid_, user)); 813 add_cache_files(cache, 814 StringPrintf("%s/Android/data", create_data_media_path(uuid_, user).c_str())); 815 } 816 817 clear_cache_files(data_path, cache, freeStorageSize); 818 finish_cache_collection(cache); 819 820 avail = data_disk_free(data_path); 821 if (avail >= freeStorageSize) { 822 return ok(); 823 } else { 824 return error(StringPrintf("Failed to free up %" PRId64 " on %s; final free space %" PRId64, 825 freeStorageSize, data_path.c_str(), avail)); 826 } 827} 828 829binder::Status InstalldNativeService::rmdex(const std::string& codePath, 830 const std::string& instructionSet) { 831 ENFORCE_UID(AID_SYSTEM); 832 char dex_path[PKG_PATH_MAX]; 833 834 const char* path = codePath.c_str(); 835 const char* instruction_set = instructionSet.c_str(); 836 837 if (validate_apk_path(path) && validate_system_app_path(path)) { 838 return error("Invalid path " + codePath); 839 } 840 841 if (!create_cache_path(dex_path, path, instruction_set)) { 842 return error("Failed to create cache path for " + codePath); 843 } 844 845 ALOGV("unlink %s\n", dex_path); 846 if (unlink(dex_path) < 0) { 847 return error(StringPrintf("Failed to unlink %s", dex_path)); 848 } else { 849 return ok(); 850 } 851} 852 853struct stats { 854 int64_t codeSize; 855 int64_t dataSize; 856 int64_t cacheSize; 857}; 858 859#if MEASURE_DEBUG 860static std::string toString(std::vector<int64_t> values) { 861 std::stringstream res; 862 res << "["; 863 for (size_t i = 0; i < values.size(); i++) { 864 res << values[i]; 865 if (i < values.size() - 1) { 866 res << ","; 867 } 868 } 869 res << "]"; 870 return res.str(); 871} 872#endif 873 874static std::string findDeviceForUuid(const std::unique_ptr<std::string>& uuid) { 875 auto path = create_data_path(uuid ? uuid->c_str() : nullptr); 876 std::ifstream in("/proc/mounts"); 877 if (!in.is_open()) { 878 PLOG(ERROR) << "Failed to read mounts"; 879 return ""; 880 } 881 std::string source; 882 std::string target; 883 while (!in.eof()) { 884 std::getline(in, source, ' '); 885 std::getline(in, target, ' '); 886 if (target == path) { 887 return source; 888 } 889 // Skip to next line 890 std::getline(in, source); 891 } 892 PLOG(ERROR) << "Failed to resolve block device for " << path; 893 return ""; 894} 895 896static void collectQuotaStats(const std::string& device, int32_t userId, 897 int32_t appId, struct stats* stats, struct stats* extStats ATTRIBUTE_UNUSED) { 898 if (device.empty()) return; 899 900 struct dqblk dq; 901 902 uid_t uid = multiuser_get_uid(userId, appId); 903 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 904 reinterpret_cast<char*>(&dq)) != 0) { 905 if (errno != ESRCH) { 906 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 907 } 908 } else { 909#if MEASURE_DEBUG 910 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 911#endif 912 stats->dataSize += dq.dqb_curspace; 913 } 914 915 int cacheGid = multiuser_get_cache_gid(userId, appId); 916 if (cacheGid != -1) { 917 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), cacheGid, 918 reinterpret_cast<char*>(&dq)) != 0) { 919 if (errno != ESRCH) { 920 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << cacheGid; 921 } 922 } else { 923#if MEASURE_DEBUG 924 LOG(DEBUG) << "quotactl() for GID " << cacheGid << " " << dq.dqb_curspace; 925#endif 926 stats->cacheSize += dq.dqb_curspace; 927 } 928 } 929 930 int sharedGid = multiuser_get_shared_app_gid(uid); 931 if (sharedGid != -1) { 932 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), sharedGid, 933 reinterpret_cast<char*>(&dq)) != 0) { 934 if (errno != ESRCH) { 935 PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << sharedGid; 936 } 937 } else { 938#if MEASURE_DEBUG 939 LOG(DEBUG) << "quotactl() for GID " << sharedGid << " " << dq.dqb_curspace; 940#endif 941 stats->codeSize += dq.dqb_curspace; 942 } 943 } 944 945#if MEASURE_EXTERNAL 946 // TODO: measure using external GIDs 947#endif 948} 949 950static void collectQuotaStats(const std::unique_ptr<std::string>& uuid, int32_t userId, 951 int32_t appId, struct stats* stats, struct stats* extStats) { 952 collectQuotaStats(findDeviceForUuid(uuid), userId, appId, stats, extStats); 953} 954 955static void collectManualStats(const std::string& path, struct stats* stats) { 956 DIR *d; 957 int dfd; 958 struct dirent *de; 959 struct stat s; 960 961 d = opendir(path.c_str()); 962 if (d == nullptr) { 963 if (errno != ENOENT) { 964 PLOG(WARNING) << "Failed to open " << path; 965 } 966 return; 967 } 968 dfd = dirfd(d); 969 while ((de = readdir(d))) { 970 const char *name = de->d_name; 971 972 int64_t size = 0; 973 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 974 size = s.st_blocks * 512; 975 } 976 977 if (de->d_type == DT_DIR) { 978 if (!strcmp(name, ".")) { 979 // Don't recurse, but still count node size 980 } else if (!strcmp(name, "..")) { 981 // Don't recurse or count node size 982 continue; 983 } else { 984 // Measure all children nodes 985 size = 0; 986 calculate_tree_size(StringPrintf("%s/%s", path.c_str(), name), &size); 987 } 988 989 if (!strcmp(name, "cache") || !strcmp(name, "code_cache")) { 990 stats->cacheSize += size; 991 } 992 } 993 994 // Legacy symlink isn't owned by app 995 if (de->d_type == DT_LNK && !strcmp(name, "lib")) { 996 continue; 997 } 998 999 // Everything found inside is considered data 1000 stats->dataSize += size; 1001 } 1002 closedir(d); 1003} 1004 1005static void collectManualStatsForUser(const std::string& path, struct stats* stats, 1006 bool exclude_apps = false) { 1007 DIR *d; 1008 int dfd; 1009 struct dirent *de; 1010 struct stat s; 1011 1012 d = opendir(path.c_str()); 1013 if (d == nullptr) { 1014 if (errno != ENOENT) { 1015 PLOG(WARNING) << "Failed to open " << path; 1016 } 1017 return; 1018 } 1019 dfd = dirfd(d); 1020 while ((de = readdir(d))) { 1021 if (de->d_type == DT_DIR) { 1022 const char *name = de->d_name; 1023 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) != 0) { 1024 continue; 1025 } 1026 if (!strcmp(name, ".") || !strcmp(name, "..")) { 1027 continue; 1028 } else if (exclude_apps && (s.st_uid >= AID_APP_START && s.st_uid <= AID_APP_END)) { 1029 continue; 1030 } else { 1031 collectManualStats(StringPrintf("%s/%s", path.c_str(), name), stats); 1032 } 1033 } 1034 } 1035 closedir(d); 1036} 1037 1038binder::Status InstalldNativeService::getAppSize(const std::unique_ptr<std::string>& uuid, 1039 const std::vector<std::string>& packageNames, int32_t userId, int32_t flags, 1040 int32_t appId, const std::vector<int64_t>& ceDataInodes, 1041 const std::vector<std::string>& codePaths, std::vector<int64_t>* _aidl_return) { 1042 ENFORCE_UID(AID_SYSTEM); 1043 CHECK_ARGUMENT_UUID(uuid); 1044 for (auto packageName : packageNames) { 1045 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1046 } 1047 1048 // When modifying this logic, always verify using tests: 1049 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetAppSize 1050 1051#if MEASURE_DEBUG 1052 LOG(INFO) << "Measuring user " << userId << " app " << appId; 1053#endif 1054 1055 // Here's a summary of the common storage locations across the platform, 1056 // and how they're each tagged: 1057 // 1058 // /data/app/com.example UID system 1059 // /data/app/com.example/oat UID system 1060 // /data/user/0/com.example UID u0_a10 GID u0_a10 1061 // /data/user/0/com.example/cache UID u0_a10 GID u0_a10_cache 1062 // /data/media/0/foo.txt UID u0_media_rw 1063 // /data/media/0/bar.jpg UID u0_media_rw GID u0_media_image 1064 // /data/media/0/Android/data/com.example UID u0_media_rw GID u0_a10_ext 1065 // /data/media/0/Android/data/com.example/cache UID u0_media_rw GID u0_a10_ext_cache 1066 // /data/media/obb/com.example UID system 1067 1068 struct stats stats; 1069 struct stats extStats; 1070 memset(&stats, 0, sizeof(stats)); 1071 memset(&extStats, 0, sizeof(extStats)); 1072 1073 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1074 1075 for (auto packageName : packageNames) { 1076 auto obbCodePath = create_data_media_obb_path(uuid_, packageName.c_str()); 1077 calculate_tree_size(obbCodePath, &extStats.codeSize); 1078 } 1079 1080 if (flags & FLAG_USE_QUOTA && appId >= AID_APP_START) { 1081 for (auto codePath : codePaths) { 1082 calculate_tree_size(codePath, &stats.codeSize, -1, 1083 multiuser_get_shared_gid(userId, appId)); 1084 } 1085 1086 collectQuotaStats(uuid, userId, appId, &stats, &extStats); 1087 1088 } else { 1089 for (auto codePath : codePaths) { 1090 calculate_tree_size(codePath, &stats.codeSize); 1091 } 1092 1093 for (size_t i = 0; i < packageNames.size(); i++) { 1094 const char* pkgname = packageNames[i].c_str(); 1095 1096 auto cePath = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInodes[i]); 1097 collectManualStats(cePath, &stats); 1098 1099 auto dePath = create_data_user_de_package_path(uuid_, userId, pkgname); 1100 collectManualStats(dePath, &stats); 1101 1102 auto userProfilePath = create_data_user_profile_package_path(userId, pkgname); 1103 calculate_tree_size(userProfilePath, &stats.dataSize); 1104 1105 auto refProfilePath = create_data_ref_profile_package_path(pkgname); 1106 calculate_tree_size(refProfilePath, &stats.codeSize); 1107 1108#if MEASURE_EXTERNAL 1109 auto extPath = create_data_media_package_path(uuid_, userId, pkgname, "data"); 1110 collectManualStats(extPath, &extStats); 1111 1112 auto mediaPath = create_data_media_package_path(uuid_, userId, pkgname, "media"); 1113 calculate_tree_size(mediaPath, &extStats.dataSize); 1114#endif 1115 } 1116 1117 int32_t sharedGid = multiuser_get_shared_gid(userId, appId); 1118 if (sharedGid != -1) { 1119 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1120 sharedGid, -1); 1121 } 1122 1123 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize, 1124 multiuser_get_uid(userId, appId), -1); 1125 } 1126 1127 std::vector<int64_t> ret; 1128 ret.push_back(stats.codeSize); 1129 ret.push_back(stats.dataSize); 1130 ret.push_back(stats.cacheSize); 1131 ret.push_back(extStats.codeSize); 1132 ret.push_back(extStats.dataSize); 1133 ret.push_back(extStats.cacheSize); 1134#if MEASURE_DEBUG 1135 LOG(DEBUG) << "Final result " << toString(ret); 1136#endif 1137 *_aidl_return = ret; 1138 return ok(); 1139} 1140 1141binder::Status InstalldNativeService::getUserSize(const std::unique_ptr<std::string>& uuid, 1142 int32_t userId, int32_t flags, const std::vector<int32_t>& appIds, 1143 std::vector<int64_t>* _aidl_return) { 1144 ENFORCE_UID(AID_SYSTEM); 1145 CHECK_ARGUMENT_UUID(uuid); 1146 1147 // When modifying this logic, always verify using tests: 1148 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetUserSize 1149 1150#if MEASURE_DEBUG 1151 LOG(INFO) << "Measuring user " << userId; 1152#endif 1153 1154 struct stats stats; 1155 struct stats extStats; 1156 memset(&stats, 0, sizeof(stats)); 1157 memset(&extStats, 0, sizeof(extStats)); 1158 1159 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1160 1161 auto obbPath = create_data_path(uuid_) + "/media/obb"; 1162 calculate_tree_size(obbPath, &extStats.codeSize); 1163 1164 if (flags & FLAG_USE_QUOTA) { 1165 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize, -1, -1, true); 1166 1167 auto cePath = create_data_user_ce_path(uuid_, userId); 1168 collectManualStatsForUser(cePath, &stats, true); 1169 1170 auto dePath = create_data_user_de_path(uuid_, userId); 1171 collectManualStatsForUser(dePath, &stats, true); 1172 1173 auto userProfilePath = create_data_user_profile_path(userId); 1174 calculate_tree_size(userProfilePath, &stats.dataSize, -1, -1, true); 1175 1176 auto refProfilePath = create_data_ref_profile_path(); 1177 calculate_tree_size(refProfilePath, &stats.codeSize, -1, -1, true); 1178 1179#if MEASURE_EXTERNAL 1180 // TODO: measure external storage paths 1181#endif 1182 1183 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize, 1184 -1, -1, true); 1185 1186 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize, 1187 -1, -1, true); 1188 1189 auto device = findDeviceForUuid(uuid); 1190 for (auto appId : appIds) { 1191 if (appId >= AID_APP_START) { 1192 collectQuotaStats(device, userId, appId, &stats, &extStats); 1193#if MEASURE_DEBUG 1194 // Sleep to make sure we don't lose logs 1195 usleep(1); 1196#endif 1197 } 1198 } 1199 } else { 1200 calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize); 1201 1202 auto cePath = create_data_user_ce_path(uuid_, userId); 1203 collectManualStatsForUser(cePath, &stats); 1204 1205 auto dePath = create_data_user_de_path(uuid_, userId); 1206 collectManualStatsForUser(dePath, &stats); 1207 1208 auto userProfilePath = create_data_user_profile_path(userId); 1209 calculate_tree_size(userProfilePath, &stats.dataSize); 1210 1211 auto refProfilePath = create_data_ref_profile_path(); 1212 calculate_tree_size(refProfilePath, &stats.codeSize); 1213 1214#if MEASURE_EXTERNAL 1215 // TODO: measure external storage paths 1216#endif 1217 1218 calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize); 1219 1220 calculate_tree_size(create_data_misc_foreign_dex_path(userId), &stats.dataSize); 1221 } 1222 1223 std::vector<int64_t> ret; 1224 ret.push_back(stats.codeSize); 1225 ret.push_back(stats.dataSize); 1226 ret.push_back(stats.cacheSize); 1227 ret.push_back(extStats.codeSize); 1228 ret.push_back(extStats.dataSize); 1229 ret.push_back(extStats.cacheSize); 1230#if MEASURE_DEBUG 1231 LOG(DEBUG) << "Final result " << toString(ret); 1232#endif 1233 *_aidl_return = ret; 1234 return ok(); 1235} 1236 1237binder::Status InstalldNativeService::getExternalSize(const std::unique_ptr<std::string>& uuid, 1238 int32_t userId, int32_t flags, std::vector<int64_t>* _aidl_return) { 1239 ENFORCE_UID(AID_SYSTEM); 1240 CHECK_ARGUMENT_UUID(uuid); 1241 1242 // When modifying this logic, always verify using tests: 1243 // runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetExternalSize 1244 1245#if MEASURE_DEBUG 1246 LOG(INFO) << "Measuring external " << userId; 1247#endif 1248 1249 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1250 1251 int64_t totalSize = 0; 1252 int64_t audioSize = 0; 1253 int64_t videoSize = 0; 1254 int64_t imageSize = 0; 1255 1256 if (flags & FLAG_USE_QUOTA) { 1257 struct dqblk dq; 1258 1259 auto device = findDeviceForUuid(uuid); 1260 1261 uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW); 1262 if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid, 1263 reinterpret_cast<char*>(&dq)) != 0) { 1264 if (errno != ESRCH) { 1265 PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid; 1266 } 1267 } else { 1268#if MEASURE_DEBUG 1269 LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace; 1270#endif 1271 totalSize = dq.dqb_curspace; 1272 } 1273 1274 gid_t audioGid = multiuser_get_uid(userId, AID_MEDIA_AUDIO); 1275 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), audioGid, 1276 reinterpret_cast<char*>(&dq)) == 0) { 1277#if MEASURE_DEBUG 1278 LOG(DEBUG) << "quotactl() for GID " << audioGid << " " << dq.dqb_curspace; 1279#endif 1280 audioSize = dq.dqb_curspace; 1281 } 1282 gid_t videoGid = multiuser_get_uid(userId, AID_MEDIA_VIDEO); 1283 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), videoGid, 1284 reinterpret_cast<char*>(&dq)) == 0) { 1285#if MEASURE_DEBUG 1286 LOG(DEBUG) << "quotactl() for GID " << videoGid << " " << dq.dqb_curspace; 1287#endif 1288 videoSize = dq.dqb_curspace; 1289 } 1290 gid_t imageGid = multiuser_get_uid(userId, AID_MEDIA_IMAGE); 1291 if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), imageGid, 1292 reinterpret_cast<char*>(&dq)) == 0) { 1293#if MEASURE_DEBUG 1294 LOG(DEBUG) << "quotactl() for GID " << imageGid << " " << dq.dqb_curspace; 1295#endif 1296 imageSize = dq.dqb_curspace; 1297 } 1298 } else { 1299 FTS *fts; 1300 FTSENT *p; 1301 auto path = create_data_media_path(uuid_, userId); 1302 char *argv[] = { (char*) path.c_str(), nullptr }; 1303 if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_XDEV, NULL))) { 1304 return error("Failed to fts_open " + path); 1305 } 1306 while ((p = fts_read(fts)) != NULL) { 1307 char* ext; 1308 int64_t size = (p->fts_statp->st_blocks * 512); 1309 switch (p->fts_info) { 1310 case FTS_F: 1311 // Only categorize files not belonging to apps 1312 if (p->fts_statp->st_gid < AID_APP_START) { 1313 ext = strrchr(p->fts_name, '.'); 1314 if (ext != nullptr) { 1315 switch (MatchExtension(++ext)) { 1316 case AID_MEDIA_AUDIO: audioSize += size; break; 1317 case AID_MEDIA_VIDEO: videoSize += size; break; 1318 case AID_MEDIA_IMAGE: imageSize += size; break; 1319 } 1320 } 1321 } 1322 // Fall through to always count against total 1323 case FTS_D: 1324 case FTS_DEFAULT: 1325 case FTS_SL: 1326 case FTS_SLNONE: 1327 totalSize += size; 1328 break; 1329 } 1330 } 1331 fts_close(fts); 1332 } 1333 1334 std::vector<int64_t> ret; 1335 ret.push_back(totalSize); 1336 ret.push_back(audioSize); 1337 ret.push_back(videoSize); 1338 ret.push_back(imageSize); 1339#if MEASURE_DEBUG 1340 LOG(DEBUG) << "Final result " << toString(ret); 1341#endif 1342 *_aidl_return = ret; 1343 return ok(); 1344} 1345 1346// Dumps the contents of a profile file, using pkgname's dex files for pretty 1347// printing the result. 1348binder::Status InstalldNativeService::dumpProfiles(int32_t uid, const std::string& packageName, 1349 const std::string& codePaths, bool* _aidl_return) { 1350 ENFORCE_UID(AID_SYSTEM); 1351 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1352 1353 const char* pkgname = packageName.c_str(); 1354 const char* code_paths = codePaths.c_str(); 1355 1356 *_aidl_return = dump_profiles(uid, pkgname, code_paths); 1357 return ok(); 1358} 1359 1360// TODO: Consider returning error codes. 1361binder::Status InstalldNativeService::mergeProfiles(int32_t uid, const std::string& packageName, 1362 bool* _aidl_return) { 1363 ENFORCE_UID(AID_SYSTEM); 1364 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1365 1366 const char* pkgname = packageName.c_str(); 1367 *_aidl_return = analyse_profiles(uid, pkgname); 1368 return ok(); 1369} 1370 1371binder::Status InstalldNativeService::dexopt(const std::string& apkPath, int32_t uid, 1372 const std::unique_ptr<std::string>& packageName, const std::string& instructionSet, 1373 int32_t dexoptNeeded, const std::unique_ptr<std::string>& outputPath, int32_t dexFlags, 1374 const std::string& compilerFilter, const std::unique_ptr<std::string>& uuid, 1375 const std::unique_ptr<std::string>& sharedLibraries) { 1376 ENFORCE_UID(AID_SYSTEM); 1377 CHECK_ARGUMENT_UUID(uuid); 1378 if (packageName && *packageName != "*") { 1379 CHECK_ARGUMENT_PACKAGE_NAME(*packageName); 1380 } 1381 1382 const char* apk_path = apkPath.c_str(); 1383 const char* pkgname = packageName ? packageName->c_str() : "*"; 1384 const char* instruction_set = instructionSet.c_str(); 1385 const char* oat_dir = outputPath ? outputPath->c_str() : nullptr; 1386 const char* compiler_filter = compilerFilter.c_str(); 1387 const char* volume_uuid = uuid ? uuid->c_str() : nullptr; 1388 const char* shared_libraries = sharedLibraries ? sharedLibraries->c_str() : nullptr; 1389 1390 int res = android::installd::dexopt(apk_path, uid, pkgname, instruction_set, dexoptNeeded, 1391 oat_dir, dexFlags, compiler_filter, volume_uuid, shared_libraries); 1392 return res ? error(res, "Failed to dexopt") : ok(); 1393} 1394 1395binder::Status InstalldNativeService::markBootComplete(const std::string& instructionSet) { 1396 ENFORCE_UID(AID_SYSTEM); 1397 const char* instruction_set = instructionSet.c_str(); 1398 1399 char boot_marker_path[PKG_PATH_MAX]; 1400 sprintf(boot_marker_path, 1401 "%s/%s/%s/.booting", 1402 android_data_dir.path, 1403 DALVIK_CACHE, 1404 instruction_set); 1405 1406 ALOGV("mark_boot_complete : %s", boot_marker_path); 1407 if (unlink(boot_marker_path) != 0) { 1408 return error(StringPrintf("Failed to unlink %s", boot_marker_path)); 1409 } 1410 return ok(); 1411} 1412 1413void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid, 1414 struct stat* statbuf) 1415{ 1416 while (path[basepos] != 0) { 1417 if (path[basepos] == '/') { 1418 path[basepos] = 0; 1419 if (lstat(path, statbuf) < 0) { 1420 ALOGV("Making directory: %s\n", path); 1421 if (mkdir(path, mode) == 0) { 1422 chown(path, uid, gid); 1423 } else { 1424 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno)); 1425 } 1426 } 1427 path[basepos] = '/'; 1428 basepos++; 1429 } 1430 basepos++; 1431 } 1432} 1433 1434binder::Status InstalldNativeService::linkNativeLibraryDirectory( 1435 const std::unique_ptr<std::string>& uuid, const std::string& packageName, 1436 const std::string& nativeLibPath32, int32_t userId) { 1437 ENFORCE_UID(AID_SYSTEM); 1438 CHECK_ARGUMENT_UUID(uuid); 1439 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1440 1441 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1442 const char* pkgname = packageName.c_str(); 1443 const char* asecLibDir = nativeLibPath32.c_str(); 1444 struct stat s, libStat; 1445 binder::Status res = ok(); 1446 1447 auto _pkgdir = create_data_user_ce_package_path(uuid_, userId, pkgname); 1448 auto _libsymlink = _pkgdir + PKG_LIB_POSTFIX; 1449 1450 const char* pkgdir = _pkgdir.c_str(); 1451 const char* libsymlink = _libsymlink.c_str(); 1452 1453 if (stat(pkgdir, &s) < 0) { 1454 return error("Failed to stat " + _pkgdir); 1455 } 1456 1457 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) { 1458 return error("Failed to chown " + _pkgdir); 1459 } 1460 1461 if (chmod(pkgdir, 0700) < 0) { 1462 res = error("Failed to chmod " + _pkgdir); 1463 goto out; 1464 } 1465 1466 if (lstat(libsymlink, &libStat) < 0) { 1467 if (errno != ENOENT) { 1468 res = error("Failed to stat " + _libsymlink); 1469 goto out; 1470 } 1471 } else { 1472 if (S_ISDIR(libStat.st_mode)) { 1473 if (delete_dir_contents(libsymlink, 1, NULL) < 0) { 1474 res = error("Failed to delete " + _libsymlink); 1475 goto out; 1476 } 1477 } else if (S_ISLNK(libStat.st_mode)) { 1478 if (unlink(libsymlink) < 0) { 1479 res = error("Failed to unlink " + _libsymlink); 1480 goto out; 1481 } 1482 } 1483 } 1484 1485 if (symlink(asecLibDir, libsymlink) < 0) { 1486 res = error("Failed to symlink " + _libsymlink + " to " + nativeLibPath32); 1487 goto out; 1488 } 1489 1490out: 1491 if (chmod(pkgdir, s.st_mode) < 0) { 1492 auto msg = "Failed to cleanup chmod " + _pkgdir; 1493 if (res.isOk()) { 1494 res = error(msg); 1495 } else { 1496 PLOG(ERROR) << msg; 1497 } 1498 } 1499 1500 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) { 1501 auto msg = "Failed to cleanup chown " + _pkgdir; 1502 if (res.isOk()) { 1503 res = error(msg); 1504 } else { 1505 PLOG(ERROR) << msg; 1506 } 1507 } 1508 1509 return res; 1510} 1511 1512static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd) 1513{ 1514 static const char *IDMAP_BIN = "/system/bin/idmap"; 1515 static const size_t MAX_INT_LEN = 32; 1516 char idmap_str[MAX_INT_LEN]; 1517 1518 snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd); 1519 1520 execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL); 1521 ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno)); 1522} 1523 1524// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix) 1525// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap 1526static int flatten_path(const char *prefix, const char *suffix, 1527 const char *overlay_path, char *idmap_path, size_t N) 1528{ 1529 if (overlay_path == NULL || idmap_path == NULL) { 1530 return -1; 1531 } 1532 const size_t len_overlay_path = strlen(overlay_path); 1533 // will access overlay_path + 1 further below; requires absolute path 1534 if (len_overlay_path < 2 || *overlay_path != '/') { 1535 return -1; 1536 } 1537 const size_t len_idmap_root = strlen(prefix); 1538 const size_t len_suffix = strlen(suffix); 1539 if (SIZE_MAX - len_idmap_root < len_overlay_path || 1540 SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) { 1541 // additions below would cause overflow 1542 return -1; 1543 } 1544 if (N < len_idmap_root + len_overlay_path + len_suffix) { 1545 return -1; 1546 } 1547 memset(idmap_path, 0, N); 1548 snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix); 1549 char *ch = idmap_path + len_idmap_root; 1550 while (*ch != '\0') { 1551 if (*ch == '/') { 1552 *ch = '@'; 1553 } 1554 ++ch; 1555 } 1556 return 0; 1557} 1558 1559binder::Status InstalldNativeService::idmap(const std::string& targetApkPath, 1560 const std::string& overlayApkPath, int32_t uid) { 1561 ENFORCE_UID(AID_SYSTEM); 1562 const char* target_apk = targetApkPath.c_str(); 1563 const char* overlay_apk = overlayApkPath.c_str(); 1564 ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid); 1565 1566 int idmap_fd = -1; 1567 char idmap_path[PATH_MAX]; 1568 1569 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1570 idmap_path, sizeof(idmap_path)) == -1) { 1571 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1572 goto fail; 1573 } 1574 1575 unlink(idmap_path); 1576 idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644); 1577 if (idmap_fd < 0) { 1578 ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno)); 1579 goto fail; 1580 } 1581 if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) { 1582 ALOGE("idmap cannot chown '%s'\n", idmap_path); 1583 goto fail; 1584 } 1585 if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { 1586 ALOGE("idmap cannot chmod '%s'\n", idmap_path); 1587 goto fail; 1588 } 1589 1590 pid_t pid; 1591 pid = fork(); 1592 if (pid == 0) { 1593 /* child -- drop privileges before continuing */ 1594 if (setgid(uid) != 0) { 1595 ALOGE("setgid(%d) failed during idmap\n", uid); 1596 exit(1); 1597 } 1598 if (setuid(uid) != 0) { 1599 ALOGE("setuid(%d) failed during idmap\n", uid); 1600 exit(1); 1601 } 1602 if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) { 1603 ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno)); 1604 exit(1); 1605 } 1606 1607 run_idmap(target_apk, overlay_apk, idmap_fd); 1608 exit(1); /* only if exec call to idmap failed */ 1609 } else { 1610 int status = wait_child(pid); 1611 if (status != 0) { 1612 ALOGE("idmap failed, status=0x%04x\n", status); 1613 goto fail; 1614 } 1615 } 1616 1617 close(idmap_fd); 1618 return ok(); 1619fail: 1620 if (idmap_fd >= 0) { 1621 close(idmap_fd); 1622 unlink(idmap_path); 1623 } 1624 return error(); 1625} 1626 1627binder::Status InstalldNativeService::restoreconAppData(const std::unique_ptr<std::string>& uuid, 1628 const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, 1629 const std::string& seInfo) { 1630 ENFORCE_UID(AID_SYSTEM); 1631 CHECK_ARGUMENT_UUID(uuid); 1632 CHECK_ARGUMENT_PACKAGE_NAME(packageName); 1633 1634 binder::Status res = ok(); 1635 1636 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here. 1637 unsigned int seflags = SELINUX_ANDROID_RESTORECON_RECURSE; 1638 const char* uuid_ = uuid ? uuid->c_str() : nullptr; 1639 const char* pkgName = packageName.c_str(); 1640 const char* seinfo = seInfo.c_str(); 1641 1642 uid_t uid = multiuser_get_uid(userId, appId); 1643 if (flags & FLAG_STORAGE_CE) { 1644 auto path = create_data_user_ce_package_path(uuid_, userId, pkgName); 1645 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 1646 res = error("restorecon failed for " + path); 1647 } 1648 } 1649 if (flags & FLAG_STORAGE_DE) { 1650 auto path = create_data_user_de_package_path(uuid_, userId, pkgName); 1651 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { 1652 res = error("restorecon failed for " + path); 1653 } 1654 } 1655 return res; 1656} 1657 1658binder::Status InstalldNativeService::createOatDir(const std::string& oatDir, 1659 const std::string& instructionSet) { 1660 ENFORCE_UID(AID_SYSTEM); 1661 const char* oat_dir = oatDir.c_str(); 1662 const char* instruction_set = instructionSet.c_str(); 1663 char oat_instr_dir[PKG_PATH_MAX]; 1664 1665 if (validate_apk_path(oat_dir)) { 1666 return error("Invalid path " + oatDir); 1667 } 1668 if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1669 return error("Failed to prepare " + oatDir); 1670 } 1671 if (selinux_android_restorecon(oat_dir, 0)) { 1672 return error("Failed to restorecon " + oatDir); 1673 } 1674 snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set); 1675 if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1676 return error(StringPrintf("Failed to prepare %s", oat_instr_dir)); 1677 } 1678 return ok(); 1679} 1680 1681binder::Status InstalldNativeService::rmPackageDir(const std::string& packageDir) { 1682 ENFORCE_UID(AID_SYSTEM); 1683 if (validate_apk_path(packageDir.c_str())) { 1684 return error("Invalid path " + packageDir); 1685 } 1686 if (delete_dir_contents_and_dir(packageDir) != 0) { 1687 return error("Failed to delete " + packageDir); 1688 } 1689 return ok(); 1690} 1691 1692binder::Status InstalldNativeService::linkFile(const std::string& relativePath, 1693 const std::string& fromBase, const std::string& toBase) { 1694 ENFORCE_UID(AID_SYSTEM); 1695 const char* relative_path = relativePath.c_str(); 1696 const char* from_base = fromBase.c_str(); 1697 const char* to_base = toBase.c_str(); 1698 char from_path[PKG_PATH_MAX]; 1699 char to_path[PKG_PATH_MAX]; 1700 snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path); 1701 snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path); 1702 1703 if (validate_apk_path_subdirs(from_path)) { 1704 return error(StringPrintf("Invalid from path %s", from_path)); 1705 } 1706 1707 if (validate_apk_path_subdirs(to_path)) { 1708 return error(StringPrintf("Invalid to path %s", to_path)); 1709 } 1710 1711 if (link(from_path, to_path) < 0) { 1712 return error(StringPrintf("Failed to link from %s to %s", from_path, to_path)); 1713 } 1714 1715 return ok(); 1716} 1717 1718binder::Status InstalldNativeService::moveAb(const std::string& apkPath, 1719 const std::string& instructionSet, const std::string& outputPath) { 1720 ENFORCE_UID(AID_SYSTEM); 1721 1722 const char* apk_path = apkPath.c_str(); 1723 const char* instruction_set = instructionSet.c_str(); 1724 const char* oat_dir = outputPath.c_str(); 1725 1726 bool success = move_ab(apk_path, instruction_set, oat_dir); 1727 return success ? ok() : error(); 1728} 1729 1730binder::Status InstalldNativeService::deleteOdex(const std::string& apkPath, 1731 const std::string& instructionSet, const std::string& outputPath) { 1732 ENFORCE_UID(AID_SYSTEM); 1733 1734 const char* apk_path = apkPath.c_str(); 1735 const char* instruction_set = instructionSet.c_str(); 1736 const char* oat_dir = outputPath.c_str(); 1737 1738 bool res = delete_odex(apk_path, instruction_set, oat_dir); 1739 return res ? ok() : error(); 1740} 1741 1742} // namespace installd 1743} // namespace android 1744