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Diffstat (limited to 'cmds/installd/InstalldNativeService.cpp')
| -rw-r--r-- | cmds/installd/InstalldNativeService.cpp | 2578 |
1 files changed, 2578 insertions, 0 deletions
diff --git a/cmds/installd/InstalldNativeService.cpp b/cmds/installd/InstalldNativeService.cpp new file mode 100644 index 0000000000..5d01368b2e --- /dev/null +++ b/cmds/installd/InstalldNativeService.cpp @@ -0,0 +1,2578 @@ +/* +** Copyright 2008, The Android Open Source Project +** +** Licensed under the Apache License, Version 2.0 (the "License"); +** you may not use this file except in compliance with the License. +** You may obtain a copy of the License at +** +** http://www.apache.org/licenses/LICENSE-2.0 +** +** Unless required by applicable law or agreed to in writing, software +** distributed under the License is distributed on an "AS IS" BASIS, +** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +** See the License for the specific language governing permissions and +** limitations under the License. +*/ + +#include "InstalldNativeService.h" + +#include <errno.h> +#include <inttypes.h> +#include <regex> +#include <stdlib.h> +#include <sys/capability.h> +#include <sys/file.h> +#include <sys/resource.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <sys/xattr.h> +#include <unistd.h> + +#include <android-base/logging.h> +#include <android-base/stringprintf.h> +#include <android-base/strings.h> +#include <android-base/unique_fd.h> +#include <cutils/fs.h> +#include <cutils/log.h> // TODO: Move everything to base/logging. +#include <cutils/sched_policy.h> +#include <diskusage/dirsize.h> +#include <logwrap/logwrap.h> +#include <private/android_filesystem_config.h> +#include <selinux/android.h> +#include <system/thread_defs.h> + +#include "dexopt.h" +#include "globals.h" +#include "installd_deps.h" +#include "otapreopt_utils.h" +#include "utils.h" + +#ifndef LOG_TAG +#define LOG_TAG "installd" +#endif + +using android::base::EndsWith; +using android::base::StringPrintf; + +namespace android { +namespace installd { + +static constexpr const char* kCpPath = "/system/bin/cp"; +static constexpr const char* kXattrDefault = "user.default"; + +static constexpr const char* PKG_LIB_POSTFIX = "/lib"; +static constexpr const char* CACHE_DIR_POSTFIX = "/cache"; +static constexpr const char* CODE_CACHE_DIR_POSTFIX = "/code_cache"; + +static constexpr const char* IDMAP_PREFIX = "/data/resource-cache/"; +static constexpr const char* IDMAP_SUFFIX = "@idmap"; + +// NOTE: keep in sync with StorageManager +static constexpr int FLAG_STORAGE_DE = 1 << 0; +static constexpr int FLAG_STORAGE_CE = 1 << 1; + +// NOTE: keep in sync with Installer +static constexpr int FLAG_CLEAR_CACHE_ONLY = 1 << 8; +static constexpr int FLAG_CLEAR_CODE_CACHE_ONLY = 1 << 9; + +/* dexopt needed flags matching those in dalvik.system.DexFile */ +static constexpr int DEX2OAT_FROM_SCRATCH = 1; +static constexpr int DEX2OAT_FOR_BOOT_IMAGE = 2; +static constexpr int DEX2OAT_FOR_FILTER = 3; +static constexpr int DEX2OAT_FOR_RELOCATION = 4; +static constexpr int PATCHOAT_FOR_RELOCATION = 5; + +#define MIN_RESTRICTED_HOME_SDK_VERSION 24 // > M + +typedef int fd_t; + +namespace { + +constexpr const char* kDump = "android.permission.DUMP"; + +binder::Status checkPermission(const char* permission) { + pid_t pid; + uid_t uid; + + if (checkCallingPermission(String16(permission), reinterpret_cast<int32_t*>(&pid), + reinterpret_cast<int32_t*>(&uid))) { + return binder::Status::ok(); + } else { + auto err = StringPrintf("UID %d / PID %d lacks permission %s", uid, pid, permission); + return binder::Status::fromExceptionCode(binder::Status::EX_SECURITY, String8(err.c_str())); + } +} + +binder::Status checkUid(uid_t expectedUid) { + uid_t uid = IPCThreadState::self()->getCallingUid(); + if (uid == expectedUid || uid == AID_ROOT) { + return binder::Status::ok(); + } else { + auto err = StringPrintf("UID %d is not expected UID %d", uid, expectedUid); + return binder::Status::fromExceptionCode(binder::Status::EX_SECURITY, String8(err.c_str())); + } +} + +#define ENFORCE_UID(uid) { \ + binder::Status status = checkUid((uid)); \ + if (!status.isOk()) { \ + return status; \ + } \ +} + +} // namespace + +status_t InstalldNativeService::start() { + IPCThreadState::self()->disableBackgroundScheduling(true); + status_t ret = BinderService<InstalldNativeService>::publish(); + if (ret != android::OK) { + return ret; + } + sp<ProcessState> ps(ProcessState::self()); + ps->startThreadPool(); + ps->giveThreadPoolName(); + return android::OK; +} + +status_t InstalldNativeService::dump(int fd, const Vector<String16> & /* args */) { + const binder::Status dump_permission = checkPermission(kDump); + if (!dump_permission.isOk()) { + const String8 msg(dump_permission.toString8()); + write(fd, msg.string(), msg.size()); + return PERMISSION_DENIED; + } + + std::string msg = "installd is happy\n"; + write(fd, msg.c_str(), strlen(msg.c_str())); + return NO_ERROR; +} + +static bool property_get_bool(const char* property_name, bool default_value = false) { + char tmp_property_value[kPropertyValueMax]; + bool have_property = get_property(property_name, tmp_property_value, nullptr) > 0; + if (!have_property) { + return default_value; + } + return strcmp(tmp_property_value, "true") == 0; +} + +// Keep profile paths in sync with ActivityThread. +constexpr const char* PRIMARY_PROFILE_NAME = "primary.prof"; +static std::string create_primary_profile(const std::string& profile_dir) { + return StringPrintf("%s/%s", profile_dir.c_str(), PRIMARY_PROFILE_NAME); +} + +/** + * Perform restorecon of the given path, but only perform recursive restorecon + * if the label of that top-level file actually changed. This can save us + * significant time by avoiding no-op traversals of large filesystem trees. + */ +static int restorecon_app_data_lazy(const std::string& path, const std::string& seInfo, uid_t uid) { + int res = 0; + char* before = nullptr; + char* after = nullptr; + + // Note that SELINUX_ANDROID_RESTORECON_DATADATA flag is set by + // libselinux. Not needed here. + + if (lgetfilecon(path.c_str(), &before) < 0) { + PLOG(ERROR) << "Failed before getfilecon for " << path; + goto fail; + } + if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 0) < 0) { + PLOG(ERROR) << "Failed top-level restorecon for " << path; + goto fail; + } + if (lgetfilecon(path.c_str(), &after) < 0) { + PLOG(ERROR) << "Failed after getfilecon for " << path; + goto fail; + } + + // If the initial top-level restorecon above changed the label, then go + // back and restorecon everything recursively + if (strcmp(before, after)) { + LOG(DEBUG) << "Detected label change from " << before << " to " << after << " at " << path + << "; running recursive restorecon"; + if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, + SELINUX_ANDROID_RESTORECON_RECURSE) < 0) { + PLOG(ERROR) << "Failed recursive restorecon for " << path; + goto fail; + } + } + + goto done; +fail: + res = -1; +done: + free(before); + free(after); + return res; +} + +static int restorecon_app_data_lazy(const std::string& parent, const char* name, + const std::string& seInfo, uid_t uid) { + return restorecon_app_data_lazy(StringPrintf("%s/%s", parent.c_str(), name), seInfo, uid); +} + +static int prepare_app_dir(const std::string& path, mode_t target_mode, uid_t uid) { + if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, uid) != 0) { + PLOG(ERROR) << "Failed to prepare " << path; + return -1; + } + return 0; +} + +static int prepare_app_dir(const std::string& parent, const char* name, mode_t target_mode, + uid_t uid) { + return prepare_app_dir(StringPrintf("%s/%s", parent.c_str(), name), target_mode, uid); +} + +binder::Status InstalldNativeService::createAppData(const std::unique_ptr<std::string>& uuid, + const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, + const std::string& seInfo, int32_t targetSdkVersion) { + ENFORCE_UID(AID_SYSTEM); + + const char* uuid_ = uuid ? uuid->c_str() : nullptr; + const char* pkgname = packageName.c_str(); + + uid_t uid = multiuser_get_uid(userId, appId); + mode_t target_mode = targetSdkVersion >= MIN_RESTRICTED_HOME_SDK_VERSION ? 0700 : 0751; + if (flags & FLAG_STORAGE_CE) { + auto path = create_data_user_ce_package_path(uuid_, userId, pkgname); + if (prepare_app_dir(path, target_mode, uid) || + prepare_app_dir(path, "cache", 0771, uid) || + prepare_app_dir(path, "code_cache", 0771, uid)) { + return binder::Status::fromServiceSpecificError(-1); + } + + // Consider restorecon over contents if label changed + if (restorecon_app_data_lazy(path, seInfo, uid) || + restorecon_app_data_lazy(path, "cache", seInfo, uid) || + restorecon_app_data_lazy(path, "code_cache", seInfo, uid)) { + return binder::Status::fromServiceSpecificError(-1); + } + + // Remember inode numbers of cache directories so that we can clear + // contents while CE storage is locked + if (write_path_inode(path, "cache", kXattrInodeCache) || + write_path_inode(path, "code_cache", kXattrInodeCodeCache)) { + return binder::Status::fromServiceSpecificError(-1); + } + } + if (flags & FLAG_STORAGE_DE) { + auto path = create_data_user_de_package_path(uuid_, userId, pkgname); + if (prepare_app_dir(path, target_mode, uid)) { + // TODO: include result once 25796509 is fixed + return binder::Status::ok(); + } + + // Consider restorecon over contents if label changed + if (restorecon_app_data_lazy(path, seInfo, uid)) { + return binder::Status::fromServiceSpecificError(-1); + } + + if (property_get_bool("dalvik.vm.usejitprofiles")) { + const std::string profile_path = create_data_user_profile_package_path(userId, pkgname); + // read-write-execute only for the app user. + if (fs_prepare_dir_strict(profile_path.c_str(), 0700, uid, uid) != 0) { + PLOG(ERROR) << "Failed to prepare " << profile_path; + return binder::Status::fromServiceSpecificError(-1); + } + std::string profile_file = create_primary_profile(profile_path); + // read-write only for the app user. + if (fs_prepare_file_strict(profile_file.c_str(), 0600, uid, uid) != 0) { + PLOG(ERROR) << "Failed to prepare " << profile_path; + return binder::Status::fromServiceSpecificError(-1); + } + const std::string ref_profile_path = create_data_ref_profile_package_path(pkgname); + // dex2oat/profman runs under the shared app gid and it needs to read/write reference + // profiles. + appid_t shared_app_gid = multiuser_get_shared_app_gid(uid); + if (fs_prepare_dir_strict( + ref_profile_path.c_str(), 0700, shared_app_gid, shared_app_gid) != 0) { + PLOG(ERROR) << "Failed to prepare " << ref_profile_path; + return binder::Status::fromServiceSpecificError(-1); + } + } + } + return binder::Status::ok(); +} + +binder::Status InstalldNativeService::migrateAppData(const std::unique_ptr<std::string>& uuid, + const std::string& packageName, int32_t userId, int32_t flags) { + ENFORCE_UID(AID_SYSTEM); + const char* uuid_ = uuid ? uuid->c_str() : nullptr; + const char* pkgname = packageName.c_str(); + + // This method only exists to upgrade system apps that have requested + // forceDeviceEncrypted, so their default storage always lives in a + // consistent location. This only works on non-FBE devices, since we + // never want to risk exposing data on a device with real CE/DE storage. + + auto ce_path = create_data_user_ce_package_path(uuid_, userId, pkgname); + auto de_path = create_data_user_de_package_path(uuid_, userId, pkgname); + + // If neither directory is marked as default, assume CE is default + if (getxattr(ce_path.c_str(), kXattrDefault, nullptr, 0) == -1 + && getxattr(de_path.c_str(), kXattrDefault, nullptr, 0) == -1) { + if (setxattr(ce_path.c_str(), kXattrDefault, nullptr, 0, 0) != 0) { + PLOG(ERROR) << "Failed to mark default storage " << ce_path; + return binder::Status::fromServiceSpecificError(-1); + } + } + + // Migrate default data location if needed + auto target = (flags & FLAG_STORAGE_DE) ? de_path : ce_path; + auto source = (flags & FLAG_STORAGE_DE) ? ce_path : de_path; + + if (getxattr(target.c_str(), kXattrDefault, nullptr, 0) == -1) { + LOG(WARNING) << "Requested default storage " << target + << " is not active; migrating from " << source; + if (delete_dir_contents_and_dir(target) != 0) { + PLOG(ERROR) << "Failed to delete"; + return binder::Status::fromServiceSpecificError(-1); + } + if (rename(source.c_str(), target.c_str()) != 0) { + PLOG(ERROR) << "Failed to rename"; + return binder::Status::fromServiceSpecificError(-1); + } + } + + return binder::Status::ok(); +} + +static bool clear_profile(const std::string& profile) { + base::unique_fd ufd(open(profile.c_str(), O_WRONLY | O_NOFOLLOW | O_CLOEXEC)); + if (ufd.get() < 0) { + if (errno != ENOENT) { + PLOG(WARNING) << "Could not open profile " << profile; + return false; + } else { + // Nothing to clear. That's ok. + return true; + } + } + + if (flock(ufd.get(), LOCK_EX | LOCK_NB) != 0) { + if (errno != EWOULDBLOCK) { + PLOG(WARNING) << "Error locking profile " << profile; + } + // This implies that the app owning this profile is running + // (and has acquired the lock). + // + // If we can't acquire the lock bail out since clearing is useless anyway + // (the app will write again to the profile). + // + // Note: + // This does not impact the this is not an issue for the profiling correctness. + // In case this is needed because of an app upgrade, profiles will still be + // eventually cleared by the app itself due to checksum mismatch. + // If this is needed because profman advised, then keeping the data around + // until the next run is again not an issue. + // + // If the app attempts to acquire a lock while we've held one here, + // it will simply skip the current write cycle. + return false; + } + + bool truncated = ftruncate(ufd.get(), 0) == 0; + if (!truncated) { + PLOG(WARNING) << "Could not truncate " << profile; + } + if (flock(ufd.get(), LOCK_UN) != 0) { + PLOG(WARNING) << "Error unlocking profile " << profile; + } + return truncated; +} + +static bool clear_reference_profile(const char* pkgname) { + std::string reference_profile_dir = create_data_ref_profile_package_path(pkgname); + std::string reference_profile = create_primary_profile(reference_profile_dir); + return clear_profile(reference_profile); +} + +static bool clear_current_profile(const char* pkgname, userid_t user) { + std::string profile_dir = create_data_user_profile_package_path(user, pkgname); + std::string profile = create_primary_profile(profile_dir); + return clear_profile(profile); +} + +static bool clear_current_profiles(const char* pkgname) { + bool success = true; + std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr); + for (auto user : users) { + success &= clear_current_profile(pkgname, user); + } + return success; +} + +binder::Status InstalldNativeService::clearAppProfiles(const std::string& packageName) { + ENFORCE_UID(AID_SYSTEM); + const char* pkgname = packageName.c_str(); + bool success = true; + success &= clear_reference_profile(pkgname); + success &= clear_current_profiles(pkgname); + return success ? binder::Status::ok() : binder::Status::fromServiceSpecificError(-1); +} + +binder::Status InstalldNativeService::clearAppData(const std::unique_ptr<std::string>& uuid, + const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { + ENFORCE_UID(AID_SYSTEM); + const char* uuid_ = uuid ? uuid->c_str() : nullptr; + const char* pkgname = packageName.c_str(); + + int res = 0; + if (flags & FLAG_STORAGE_CE) { + auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); + if (flags & FLAG_CLEAR_CACHE_ONLY) { + path = read_path_inode(path, "cache", kXattrInodeCache); + } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { + path = read_path_inode(path, "code_cache", kXattrInodeCodeCache); + } + if (access(path.c_str(), F_OK) == 0) { + res |= delete_dir_contents(path); + } + } + if (flags & FLAG_STORAGE_DE) { + std::string suffix = ""; + bool only_cache = false; + if (flags & FLAG_CLEAR_CACHE_ONLY) { + suffix = CACHE_DIR_POSTFIX; + only_cache = true; + } else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) { + suffix = CODE_CACHE_DIR_POSTFIX; + only_cache = true; + } + + auto path = create_data_user_de_package_path(uuid_, userId, pkgname) + suffix; + if (access(path.c_str(), F_OK) == 0) { + // TODO: include result once 25796509 is fixed + delete_dir_contents(path); + } + if (!only_cache) { + if (!clear_current_profile(pkgname, userId)) { + res |= -1; + } + } + } + return res ? binder::Status::fromServiceSpecificError(-1) : binder::Status::ok(); +} + +static int destroy_app_reference_profile(const char *pkgname) { + return delete_dir_contents_and_dir( + create_data_ref_profile_package_path(pkgname), + /*ignore_if_missing*/ true); +} + +static int destroy_app_current_profiles(const char *pkgname, userid_t userid) { + return delete_dir_contents_and_dir( + create_data_user_profile_package_path(userid, pkgname), + /*ignore_if_missing*/ true); +} + +binder::Status InstalldNativeService::destroyAppProfiles(const std::string& packageName) { + ENFORCE_UID(AID_SYSTEM); + const char* pkgname = packageName.c_str(); + int result = 0; + std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr); + for (auto user : users) { + result |= destroy_app_current_profiles(pkgname, user); + } + result |= destroy_app_reference_profile(pkgname); + return result ? binder::Status::fromServiceSpecificError(-1) : binder::Status::ok(); +} + +binder::Status InstalldNativeService::destroyAppData(const std::unique_ptr<std::string>& uuid, + const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) { + ENFORCE_UID(AID_SYSTEM); + const char* uuid_ = uuid ? uuid->c_str() : nullptr; + const char* pkgname = packageName.c_str(); + + int res = 0; + if (flags & FLAG_STORAGE_CE) { + res |= delete_dir_contents_and_dir( + create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode)); + } + if (flags & FLAG_STORAGE_DE) { + res |= delete_dir_contents_and_dir( + create_data_user_de_package_path(uuid_, userId, pkgname)); + destroy_app_current_profiles(pkgname, userId); + // TODO(calin): If the package is still installed by other users it's probably + // beneficial to keep the reference profile around. + // Verify if it's ok to do that. + destroy_app_reference_profile(pkgname); + } + return res ? binder::Status::fromServiceSpecificError(-1) : binder::Status::ok(); +} + +binder::Status InstalldNativeService::moveCompleteApp(const std::unique_ptr<std::string>& fromUuid, + const std::unique_ptr<std::string>& toUuid, const std::string& packageName, + const std::string& dataAppName, int32_t appId, const std::string& seInfo, + int32_t targetSdkVersion) { + + const char* from_uuid = fromUuid ? fromUuid->c_str() : nullptr; + const char* to_uuid = toUuid ? toUuid->c_str() : nullptr; + const char* package_name = packageName.c_str(); + const char* data_app_name = dataAppName.c_str(); + + std::vector<userid_t> users = get_known_users(from_uuid); + + // Copy app + { + auto from = create_data_app_package_path(from_uuid, data_app_name); + auto to = create_data_app_package_path(to_uuid, data_app_name); + auto to_parent = create_data_app_path(to_uuid); + + char *argv[] = { + (char*) kCpPath, + (char*) "-F", /* delete any existing destination file first (--remove-destination) */ + (char*) "-p", /* preserve timestamps, ownership, and permissions */ + (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ + (char*) "-P", /* Do not follow symlinks [default] */ + (char*) "-d", /* don't dereference symlinks */ + (char*) from.c_str(), + (char*) to_parent.c_str() + }; + + LOG(DEBUG) << "Copying " << from << " to " << to; + int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); + + if (rc != 0) { + LOG(ERROR) << "Failed copying " << from << " to " << to + << ": status " << rc; + goto fail; + } + + if (selinux_android_restorecon(to.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) { + LOG(ERROR) << "Failed to restorecon " << to; + goto fail; + } + } + + // Copy private data for all known users + for (auto user : users) { + + // Data source may not exist for all users; that's okay + auto from_ce = create_data_user_ce_package_path(from_uuid, user, package_name); + if (access(from_ce.c_str(), F_OK) != 0) { + LOG(INFO) << "Missing source " << from_ce; + continue; + } + + if (!createAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, appId, + seInfo, targetSdkVersion).isOk()) { + LOG(ERROR) << "Failed to create package target on " << to_uuid; + goto fail; + } + + char *argv[] = { + (char*) kCpPath, + (char*) "-F", /* delete any existing destination file first (--remove-destination) */ + (char*) "-p", /* preserve timestamps, ownership, and permissions */ + (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */ + (char*) "-P", /* Do not follow symlinks [default] */ + (char*) "-d", /* don't dereference symlinks */ + nullptr, + nullptr + }; + + { + auto from = create_data_user_de_package_path(from_uuid, user, package_name); + auto to = create_data_user_de_path(to_uuid, user); + argv[6] = (char*) from.c_str(); + argv[7] = (char*) to.c_str(); + + LOG(DEBUG) << "Copying " << from << " to " << to; + int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); + if (rc != 0) { + LOG(ERROR) << "Failed copying " << from << " to " << to << " with status " << rc; + goto fail; + } + } + { + auto from = create_data_user_ce_package_path(from_uuid, user, package_name); + auto to = create_data_user_ce_path(to_uuid, user); + argv[6] = (char*) from.c_str(); + argv[7] = (char*) to.c_str(); + + LOG(DEBUG) << "Copying " << from << " to " << to; + int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true); + if (rc != 0) { + LOG(ERROR) << "Failed copying " << from << " to " << to << " with status " << rc; + goto fail; + } + } + + if (!restoreconAppData(toUuid, packageName, user, FLAG_STORAGE_CE | FLAG_STORAGE_DE, + appId, seInfo).isOk()) { + LOG(ERROR) << "Failed to restorecon"; + goto fail; + } + } + + // We let the framework scan the new location and persist that before + // deleting the data in the old location; this ordering ensures that + // we can recover from things like battery pulls. + return binder::Status::ok(); + +fail: + // Nuke everything we might have already copied + { + auto to = create_data_app_package_path(to_uuid, data_app_name); + if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { + LOG(WARNING) << "Failed to rollback " << to; + } + } + for (auto user : users) { + { + auto to = create_data_user_de_package_path(to_uuid, user, package_name); + if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { + LOG(WARNING) << "Failed to rollback " << to; + } + } + { + auto to = create_data_user_ce_package_path(to_uuid, user, package_name); + if (delete_dir_contents(to.c_str(), 1, NULL) != 0) { + LOG(WARNING) << "Failed to rollback " << to; + } + } + } + return binder::Status::fromServiceSpecificError(-1); +} + +binder::Status InstalldNativeService::createUserData(const std::unique_ptr<std::string>& uuid, + int32_t userId, int32_t userSerial ATTRIBUTE_UNUSED, int32_t flags) { + ENFORCE_UID(AID_SYSTEM); + const char* uuid_ = uuid ? uuid->c_str() : nullptr; + int res = 0; + if (flags & FLAG_STORAGE_DE) { + if (uuid_ == nullptr) { + res = ensure_config_user_dirs(userId); + } + } + return res ? binder::Status::fromServiceSpecificError(-1) : binder::Status::ok(); +} + +binder::Status InstalldNativeService::destroyUserData(const std::unique_ptr<std::string>& uuid, + int32_t userId, int32_t flags) { + ENFORCE_UID(AID_SYSTEM); + const char* uuid_ = uuid ? uuid->c_str() : nullptr; + int res = 0; + if (flags & FLAG_STORAGE_DE) { + res |= delete_dir_contents_and_dir(create_data_user_de_path(uuid_, userId), true); + if (uuid_ == nullptr) { + res |= delete_dir_contents_and_dir(create_data_misc_legacy_path(userId), true); + res |= delete_dir_contents_and_dir(create_data_user_profiles_path(userId), true); + } + } + if (flags & FLAG_STORAGE_CE) { + res |= delete_dir_contents_and_dir(create_data_user_ce_path(uuid_, userId), true); + res |= delete_dir_contents_and_dir(create_data_media_path(uuid_, userId), true); + } + return res ? binder::Status::fromServiceSpecificError(-1) : binder::Status::ok(); +} + +/* Try to ensure free_size bytes of storage are available. + * Returns 0 on success. + * This is rather simple-minded because doing a full LRU would + * be potentially memory-intensive, and without atime it would + * also require that apps constantly modify file metadata even + * when just reading from the cache, which is pretty awful. + */ +binder::Status InstalldNativeService::freeCache(const std::unique_ptr<std::string>& uuid, + int64_t freeStorageSize) { + ENFORCE_UID(AID_SYSTEM); + const char* uuid_ = uuid ? uuid->c_str() : nullptr; + cache_t* cache; + int64_t avail; + + auto data_path = create_data_path(uuid_); + + avail = data_disk_free(data_path); + if (avail < 0) { + return binder::Status::fromServiceSpecificError(-1); + } + + ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", freeStorageSize, avail); + if (avail >= freeStorageSize) { + return binder::Status::ok(); + } + + cache = start_cache_collection(); + + auto users = get_known_users(uuid_); + for (auto user : users) { + add_cache_files(cache, create_data_user_ce_path(uuid_, user)); + add_cache_files(cache, create_data_user_de_path(uuid_, user)); + add_cache_files(cache, + StringPrintf("%s/Android/data", create_data_media_path(uuid_, user).c_str())); + } + + clear_cache_files(data_path, cache, freeStorageSize); + finish_cache_collection(cache); + + if (data_disk_free(data_path) >= freeStorageSize) { + return binder::Status::ok(); + } else { + return binder::Status::fromServiceSpecificError(-1); + } +} + +binder::Status InstalldNativeService::rmdex(const std::string& codePath, + const std::string& instructionSet) { + ENFORCE_UID(AID_SYSTEM); + char dex_path[PKG_PATH_MAX]; + + const char* path = codePath.c_str(); + const char* instruction_set = instructionSet.c_str(); + + if (validate_apk_path(path) && validate_system_app_path(path)) { + ALOGE("invalid apk path '%s' (bad prefix)\n", path); + return binder::Status::fromServiceSpecificError(-1); + } + + if (!create_cache_path(dex_path, path, instruction_set)) { + return binder::Status::fromServiceSpecificError(-1); + } + + ALOGV("unlink %s\n", dex_path); + if (unlink(dex_path) < 0) { + if (errno != ENOENT) { + ALOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno)); + } + return binder::Status::fromServiceSpecificError(-1); + } else { + return binder::Status::ok(); + } +} + +static void add_app_data_size(std::string& path, int64_t *codesize, int64_t *datasize, + int64_t *cachesize) { + DIR *d; + int dfd; + struct dirent *de; + struct stat s; + + d = opendir(path.c_str()); + if (d == nullptr) { + PLOG(WARNING) << "Failed to open " << path; + return; + } + dfd = dirfd(d); + while ((de = readdir(d))) { + const char *name = de->d_name; + + int64_t statsize = 0; + if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { + statsize = stat_size(&s); + } + + if (de->d_type == DT_DIR) { + int subfd; + int64_t dirsize = 0; + /* always skip "." and ".." */ + if (name[0] == '.') { + if (name[1] == 0) continue; + if ((name[1] == '.') && (name[2] == 0)) continue; + } + subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY); + if (subfd >= 0) { + dirsize = calculate_dir_size(subfd); + close(subfd); + } + // TODO: check xattrs! + if (!strcmp(name, "cache") || !strcmp(name, "code_cache")) { + *datasize += statsize; + *cachesize += dirsize; + } else { + *datasize += dirsize + statsize; + } + } else if (de->d_type == DT_LNK && !strcmp(name, "lib")) { + *codesize += statsize; + } else { + *datasize += statsize; + } + } + closedir(d); +} + +binder::Status InstalldNativeService::getAppSize(const std::unique_ptr<std::string>& uuid, + const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode, + const std::string& codePath, std::vector<int64_t>* _aidl_return) { + ENFORCE_UID(AID_SYSTEM); + const char* uuid_ = uuid ? uuid->c_str() : nullptr; + const char* pkgname = packageName.c_str(); + const char* code_path = codePath.c_str(); + + DIR *d; + int dfd; + int64_t codesize = 0; + int64_t datasize = 0; + int64_t cachesize = 0; + int64_t asecsize = 0; + + d = opendir(code_path); + if (d != nullptr) { + dfd = dirfd(d); + codesize += calculate_dir_size(dfd); + closedir(d); + } + + if (flags & FLAG_STORAGE_CE) { + auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode); + add_app_data_size(path, &codesize, &datasize, &cachesize); + } + if (flags & FLAG_STORAGE_DE) { + auto path = create_data_user_de_package_path(uuid_, userId, pkgname); + add_app_data_size(path, &codesize, &datasize, &cachesize); + } + + std::vector<int64_t> res; + res.push_back(codesize); + res.push_back(datasize); + res.push_back(cachesize); + res.push_back(asecsize); + *_aidl_return = res; + return binder::Status::ok(); +} + +binder::Status InstalldNativeService::getAppDataInode(const std::unique_ptr<std::string>& uuid, + const std::string& packageName, int32_t userId, int32_t flags, int64_t* _aidl_return) { + ENFORCE_UID(AID_SYSTEM); + const char* uuid_ = uuid ? uuid->c_str() : nullptr; + const char* pkgname = packageName.c_str(); + + int res = 0; + if (flags & FLAG_STORAGE_CE) { + auto path = create_data_user_ce_package_path(uuid_, userId, pkgname); + res = get_path_inode(path, reinterpret_cast<ino_t*>(_aidl_return)); + } + return res ? binder::Status::fromServiceSpecificError(-1) : binder::Status::ok(); +} + +static int split_count(const char *str) +{ + char *ctx; + int count = 0; + char buf[kPropertyValueMax]; + + strncpy(buf, str, sizeof(buf)); + char *pBuf = buf; + + while(strtok_r(pBuf, " ", &ctx) != NULL) { + count++; + pBuf = NULL; + } + + return count; +} + +static int split(char *buf, const char **argv) +{ + char *ctx; + int count = 0; + char *tok; + char *pBuf = buf; + + while((tok = strtok_r(pBuf, " ", &ctx)) != NULL) { + argv[count++] = tok; + pBuf = NULL; + } + + return count; +} + +static void run_patchoat(int input_oat_fd, int input_vdex_fd, int out_oat_fd, int out_vdex_fd, + const char* input_oat_file_name, const char* input_vdex_file_name, + const char* output_oat_file_name, const char* output_vdex_file_name, + const char *pkgname ATTRIBUTE_UNUSED, const char *instruction_set) +{ + static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig + static const unsigned int MAX_INSTRUCTION_SET_LEN = 7; + + static const char* PATCHOAT_BIN = "/system/bin/patchoat"; + if (strlen(instruction_set) >= MAX_INSTRUCTION_SET_LEN) { + ALOGE("Instruction set %s longer than max length of %d", + instruction_set, MAX_INSTRUCTION_SET_LEN); + return; + } + + /* input_file_name/input_fd should be the .odex/.oat file that is precompiled. I think*/ + char instruction_set_arg[strlen("--instruction-set=") + MAX_INSTRUCTION_SET_LEN]; + char input_oat_fd_arg[strlen("--input-oat-fd=") + MAX_INT_LEN]; + char input_vdex_fd_arg[strlen("--input-vdex-fd=") + MAX_INT_LEN]; + char output_oat_fd_arg[strlen("--output-oat-fd=") + MAX_INT_LEN]; + char output_vdex_fd_arg[strlen("--output-vdex-fd=") + MAX_INT_LEN]; + const char* patched_image_location_arg = "--patched-image-location=/system/framework/boot.art"; + // The caller has already gotten all the locks we need. + const char* no_lock_arg = "--no-lock-output"; + sprintf(instruction_set_arg, "--instruction-set=%s", instruction_set); + sprintf(output_oat_fd_arg, "--output-oat-fd=%d", out_oat_fd); + sprintf(input_oat_fd_arg, "--input-oat-fd=%d", input_oat_fd); + ALOGV("Running %s isa=%s in-oat-fd=%d (%s) in-vdex-fd=%d (%s) " + "out-oat-fd=%d (%s) out-vdex-fd=%d (%s)\n", + PATCHOAT_BIN, instruction_set, + input_oat_fd, input_oat_file_name, + input_vdex_fd, input_vdex_file_name, + out_oat_fd, output_oat_file_name, + out_vdex_fd, output_vdex_file_name); + + /* patchoat, patched-image-location, no-lock, isa, input-fd, output-fd */ + char* argv[9]; + argv[0] = (char*) PATCHOAT_BIN; + argv[1] = (char*) patched_image_location_arg; + argv[2] = (char*) no_lock_arg; + argv[3] = instruction_set_arg; + argv[4] = input_oat_fd_arg; + argv[5] = input_vdex_fd_arg; + argv[6] = output_oat_fd_arg; + argv[7] = output_vdex_fd_arg; + argv[8] = NULL; + + execv(PATCHOAT_BIN, (char* const *)argv); + ALOGE("execv(%s) failed: %s\n", PATCHOAT_BIN, strerror(errno)); +} + +static void run_dex2oat(int zip_fd, int oat_fd, int input_vdex_fd, int output_vdex_fd, int image_fd, + const char* input_file_name, const char* output_file_name, int swap_fd, + const char *instruction_set, const char* compiler_filter, bool vm_safe_mode, + bool debuggable, bool post_bootcomplete, int profile_fd, const char* shared_libraries) { + static const unsigned int MAX_INSTRUCTION_SET_LEN = 7; + + if (strlen(instruction_set) >= MAX_INSTRUCTION_SET_LEN) { + ALOGE("Instruction set %s longer than max length of %d", + instruction_set, MAX_INSTRUCTION_SET_LEN); + return; + } + + char dex2oat_Xms_flag[kPropertyValueMax]; + bool have_dex2oat_Xms_flag = get_property("dalvik.vm.dex2oat-Xms", dex2oat_Xms_flag, NULL) > 0; + + char dex2oat_Xmx_flag[kPropertyValueMax]; + bool have_dex2oat_Xmx_flag = get_property("dalvik.vm.dex2oat-Xmx", dex2oat_Xmx_flag, NULL) > 0; + + char dex2oat_threads_buf[kPropertyValueMax]; + bool have_dex2oat_threads_flag = get_property(post_bootcomplete + ? "dalvik.vm.dex2oat-threads" + : "dalvik.vm.boot-dex2oat-threads", + dex2oat_threads_buf, + NULL) > 0; + char dex2oat_threads_arg[kPropertyValueMax + 2]; + if (have_dex2oat_threads_flag) { + sprintf(dex2oat_threads_arg, "-j%s", dex2oat_threads_buf); + } + + char dex2oat_isa_features_key[kPropertyKeyMax]; + sprintf(dex2oat_isa_features_key, "dalvik.vm.isa.%s.features", instruction_set); + char dex2oat_isa_features[kPropertyValueMax]; + bool have_dex2oat_isa_features = get_property(dex2oat_isa_features_key, + dex2oat_isa_features, NULL) > 0; + + char dex2oat_isa_variant_key[kPropertyKeyMax]; + sprintf(dex2oat_isa_variant_key, "dalvik.vm.isa.%s.variant", instruction_set); + char dex2oat_isa_variant[kPropertyValueMax]; + bool have_dex2oat_isa_variant = get_property(dex2oat_isa_variant_key, + dex2oat_isa_variant, NULL) > 0; + + const char *dex2oat_norelocation = "-Xnorelocate"; + bool have_dex2oat_relocation_skip_flag = false; + + char dex2oat_flags[kPropertyValueMax]; + int dex2oat_flags_count = get_property("dalvik.vm.dex2oat-flags", + dex2oat_flags, NULL) <= 0 ? 0 : split_count(dex2oat_flags); + ALOGV("dalvik.vm.dex2oat-flags=%s\n", dex2oat_flags); + + // If we booting without the real /data, don't spend time compiling. + char vold_decrypt[kPropertyValueMax]; + bool have_vold_decrypt = get_property("vold.decrypt", vold_decrypt, "") > 0; + bool skip_compilation = (have_vold_decrypt && + (strcmp(vold_decrypt, "trigger_restart_min_framework") == 0 || + (strcmp(vold_decrypt, "1") == 0))); + + bool generate_debug_info = property_get_bool("debug.generate-debug-info"); + + char app_image_format[kPropertyValueMax]; + char image_format_arg[strlen("--image-format=") + kPropertyValueMax]; + bool have_app_image_format = + image_fd >= 0 && get_property("dalvik.vm.appimageformat", app_image_format, NULL) > 0; + if (have_app_image_format) { + sprintf(image_format_arg, "--image-format=%s", app_image_format); + } + + char dex2oat_large_app_threshold[kPropertyValueMax]; + bool have_dex2oat_large_app_threshold = + get_property("dalvik.vm.dex2oat-very-large", dex2oat_large_app_threshold, NULL) > 0; + char dex2oat_large_app_threshold_arg[strlen("--very-large-app-threshold=") + kPropertyValueMax]; + if (have_dex2oat_large_app_threshold) { + sprintf(dex2oat_large_app_threshold_arg, + "--very-large-app-threshold=%s", + dex2oat_large_app_threshold); + } + + static const char* DEX2OAT_BIN = "/system/bin/dex2oat"; + + static const char* RUNTIME_ARG = "--runtime-arg"; + + static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig + + char zip_fd_arg[strlen("--zip-fd=") + MAX_INT_LEN]; + char zip_location_arg[strlen("--zip-location=") + PKG_PATH_MAX]; + char input_vdex_fd_arg[strlen("--input-vdex-fd=") + MAX_INT_LEN]; + char output_vdex_fd_arg[strlen("--output-vdex-fd=") + MAX_INT_LEN]; + char oat_fd_arg[strlen("--oat-fd=") + MAX_INT_LEN]; + char oat_location_arg[strlen("--oat-location=") + PKG_PATH_MAX]; + char instruction_set_arg[strlen("--instruction-set=") + MAX_INSTRUCTION_SET_LEN]; + char instruction_set_variant_arg[strlen("--instruction-set-variant=") + kPropertyValueMax]; + char instruction_set_features_arg[strlen("--instruction-set-features=") + kPropertyValueMax]; + char dex2oat_Xms_arg[strlen("-Xms") + kPropertyValueMax]; + char dex2oat_Xmx_arg[strlen("-Xmx") + kPropertyValueMax]; + char dex2oat_compiler_filter_arg[strlen("--compiler-filter=") + kPropertyValueMax]; + bool have_dex2oat_swap_fd = false; + char dex2oat_swap_fd[strlen("--swap-fd=") + MAX_INT_LEN]; + bool have_dex2oat_image_fd = false; + char dex2oat_image_fd[strlen("--app-image-fd=") + MAX_INT_LEN]; + + sprintf(zip_fd_arg, "--zip-fd=%d", zip_fd); + sprintf(zip_location_arg, "--zip-location=%s", input_file_name); + sprintf(input_vdex_fd_arg, "--input-vdex-fd=%d", input_vdex_fd); + sprintf(output_vdex_fd_arg, "--output-vdex-fd=%d", output_vdex_fd); + sprintf(oat_fd_arg, "--oat-fd=%d", oat_fd); + sprintf(oat_location_arg, "--oat-location=%s", output_file_name); + sprintf(instruction_set_arg, "--instruction-set=%s", instruction_set); + sprintf(instruction_set_variant_arg, "--instruction-set-variant=%s", dex2oat_isa_variant); + sprintf(instruction_set_features_arg, "--instruction-set-features=%s", dex2oat_isa_features); + if (swap_fd >= 0) { + have_dex2oat_swap_fd = true; + sprintf(dex2oat_swap_fd, "--swap-fd=%d", swap_fd); + } + if (image_fd >= 0) { + have_dex2oat_image_fd = true; + sprintf(dex2oat_image_fd, "--app-image-fd=%d", image_fd); + } + + if (have_dex2oat_Xms_flag) { + sprintf(dex2oat_Xms_arg, "-Xms%s", dex2oat_Xms_flag); + } + if (have_dex2oat_Xmx_flag) { + sprintf(dex2oat_Xmx_arg, "-Xmx%s", dex2oat_Xmx_flag); + } + + // Compute compiler filter. + + bool have_dex2oat_compiler_filter_flag; + if (skip_compilation) { + strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=verify-none"); + have_dex2oat_compiler_filter_flag = true; + have_dex2oat_relocation_skip_flag = true; + } else if (vm_safe_mode) { + strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=interpret-only"); + have_dex2oat_compiler_filter_flag = true; + } else if (compiler_filter != nullptr && + strlen(compiler_filter) + strlen("--compiler-filter=") < + arraysize(dex2oat_compiler_filter_arg)) { + sprintf(dex2oat_compiler_filter_arg, "--compiler-filter=%s", compiler_filter); + have_dex2oat_compiler_filter_flag = true; + } else { + char dex2oat_compiler_filter_flag[kPropertyValueMax]; + have_dex2oat_compiler_filter_flag = get_property("dalvik.vm.dex2oat-filter", + dex2oat_compiler_filter_flag, NULL) > 0; + if (have_dex2oat_compiler_filter_flag) { + sprintf(dex2oat_compiler_filter_arg, + "--compiler-filter=%s", + dex2oat_compiler_filter_flag); + } + } + + // Check whether all apps should be compiled debuggable. + if (!debuggable) { + char prop_buf[kPropertyValueMax]; + debuggable = + (get_property("dalvik.vm.always_debuggable", prop_buf, "0") > 0) && + (prop_buf[0] == '1'); + } + char profile_arg[strlen("--profile-file-fd=") + MAX_INT_LEN]; + if (profile_fd != -1) { + sprintf(profile_arg, "--profile-file-fd=%d", profile_fd); + } + + + ALOGV("Running %s in=%s out=%s\n", DEX2OAT_BIN, input_file_name, output_file_name); + + const char* argv[9 // program name, mandatory arguments and the final NULL + + (have_dex2oat_isa_variant ? 1 : 0) + + (have_dex2oat_isa_features ? 1 : 0) + + (have_dex2oat_Xms_flag ? 2 : 0) + + (have_dex2oat_Xmx_flag ? 2 : 0) + + (have_dex2oat_compiler_filter_flag ? 1 : 0) + + (have_dex2oat_threads_flag ? 1 : 0) + + (have_dex2oat_swap_fd ? 1 : 0) + + (have_dex2oat_image_fd ? 1 : 0) + + (have_dex2oat_relocation_skip_flag ? 2 : 0) + + (generate_debug_info ? 1 : 0) + + (debuggable ? 1 : 0) + + (have_app_image_format ? 1 : 0) + + dex2oat_flags_count + + (profile_fd == -1 ? 0 : 1) + + (shared_libraries != nullptr ? 4 : 0) + + (have_dex2oat_large_app_threshold ? 1 : 0)]; + int i = 0; + argv[i++] = DEX2OAT_BIN; + argv[i++] = zip_fd_arg; + argv[i++] = zip_location_arg; + argv[i++] = input_vdex_fd_arg; + argv[i++] = output_vdex_fd_arg; + argv[i++] = oat_fd_arg; + argv[i++] = oat_location_arg; + argv[i++] = instruction_set_arg; + if (have_dex2oat_isa_variant) { + argv[i++] = instruction_set_variant_arg; + } + if (have_dex2oat_isa_features) { + argv[i++] = instruction_set_features_arg; + } + if (have_dex2oat_Xms_flag) { + argv[i++] = RUNTIME_ARG; + argv[i++] = dex2oat_Xms_arg; + } + if (have_dex2oat_Xmx_flag) { + argv[i++] = RUNTIME_ARG; + argv[i++] = dex2oat_Xmx_arg; + } + if (have_dex2oat_compiler_filter_flag) { + argv[i++] = dex2oat_compiler_filter_arg; + } + if (have_dex2oat_threads_flag) { + argv[i++] = dex2oat_threads_arg; + } + if (have_dex2oat_swap_fd) { + argv[i++] = dex2oat_swap_fd; + } + if (have_dex2oat_image_fd) { + argv[i++] = dex2oat_image_fd; + } + if (generate_debug_info) { + argv[i++] = "--generate-debug-info"; + } + if (debuggable) { + argv[i++] = "--debuggable"; + } + if (have_app_image_format) { + argv[i++] = image_format_arg; + } + if (have_dex2oat_large_app_threshold) { + argv[i++] = dex2oat_large_app_threshold_arg; + } + if (dex2oat_flags_count) { + i += split(dex2oat_flags, argv + i); + } + if (have_dex2oat_relocation_skip_flag) { + argv[i++] = RUNTIME_ARG; + argv[i++] = dex2oat_norelocation; + } + if (profile_fd != -1) { + argv[i++] = profile_arg; + } + if (shared_libraries != nullptr) { + argv[i++] = RUNTIME_ARG; + argv[i++] = "-classpath"; + argv[i++] = RUNTIME_ARG; + argv[i++] = shared_libraries; + } + // Do not add after dex2oat_flags, they should override others for debugging. + argv[i] = NULL; + + execv(DEX2OAT_BIN, (char * const *)argv); + ALOGE("execv(%s) failed: %s\n", DEX2OAT_BIN, strerror(errno)); +} + +/* + * Whether dexopt should use a swap file when compiling an APK. + * + * If kAlwaysProvideSwapFile, do this on all devices (dex2oat will make a more informed decision + * itself, anyways). + * + * Otherwise, read "dalvik.vm.dex2oat-swap". If the property exists, return whether it is "true". + * + * Otherwise, return true if this is a low-mem device. + * + * Otherwise, return default value. + */ +static bool kAlwaysProvideSwapFile = false; +static bool kDefaultProvideSwapFile = true; + +static bool ShouldUseSwapFileForDexopt() { + if (kAlwaysProvideSwapFile) { + return true; + } + + // Check the "override" property. If it exists, return value == "true". + char dex2oat_prop_buf[kPropertyValueMax]; + if (get_property("dalvik.vm.dex2oat-swap", dex2oat_prop_buf, "") > 0) { + if (strcmp(dex2oat_prop_buf, "true") == 0) { + return true; + } else { + return false; + } + } + + // Shortcut for default value. This is an implementation optimization for the process sketched + // above. If the default value is true, we can avoid to check whether this is a low-mem device, + // as low-mem is never returning false. The compiler will optimize this away if it can. + if (kDefaultProvideSwapFile) { + return true; + } + + bool is_low_mem = property_get_bool("ro.config.low_ram"); + if (is_low_mem) { + return true; + } + + // Default value must be false here. + return kDefaultProvideSwapFile; +} + +static void SetDex2OatAndPatchOatScheduling(bool set_to_bg) { + if (set_to_bg) { + if (set_sched_policy(0, SP_BACKGROUND) < 0) { + ALOGE("set_sched_policy failed: %s\n", strerror(errno)); + exit(70); + } + if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) { + ALOGE("setpriority failed: %s\n", strerror(errno)); + exit(71); + } + } +} + +static void close_all_fds(const std::vector<fd_t>& fds, const char* description) { + for (size_t i = 0; i < fds.size(); i++) { + if (close(fds[i]) != 0) { + PLOG(WARNING) << "Failed to close fd for " << description << " at index " << i; + } + } +} + +static fd_t open_profile_dir(const std::string& profile_dir) { + fd_t profile_dir_fd = TEMP_FAILURE_RETRY(open(profile_dir.c_str(), + O_PATH | O_CLOEXEC | O_DIRECTORY | O_NOFOLLOW)); + if (profile_dir_fd < 0) { + // In a multi-user environment, these directories can be created at + // different points and it's possible we'll attempt to open a profile + // dir before it exists. + if (errno != ENOENT) { + PLOG(ERROR) << "Failed to open profile_dir: " << profile_dir; + } + } + return profile_dir_fd; +} + +static fd_t open_primary_profile_file_from_dir(const std::string& profile_dir, mode_t open_mode) { + fd_t profile_dir_fd = open_profile_dir(profile_dir); + if (profile_dir_fd < 0) { + return -1; + } + + fd_t profile_fd = -1; + std::string profile_file = create_primary_profile(profile_dir); + + profile_fd = TEMP_FAILURE_RETRY(open(profile_file.c_str(), open_mode | O_NOFOLLOW)); + if (profile_fd == -1) { + // It's not an error if the profile file does not exist. + if (errno != ENOENT) { + PLOG(ERROR) << "Failed to lstat profile_dir: " << profile_dir; + } + } + // TODO(calin): use AutoCloseFD instead of closing the fd manually. + if (close(profile_dir_fd) != 0) { + PLOG(WARNING) << "Could not close profile dir " << profile_dir; + } + return profile_fd; +} + +static fd_t open_primary_profile_file(userid_t user, const char* pkgname) { + std::string profile_dir = create_data_user_profile_package_path(user, pkgname); + return open_primary_profile_file_from_dir(profile_dir, O_RDONLY); +} + +static fd_t open_reference_profile(uid_t uid, const char* pkgname, bool read_write) { + std::string reference_profile_dir = create_data_ref_profile_package_path(pkgname); + int flags = read_write ? O_RDWR | O_CREAT : O_RDONLY; + fd_t fd = open_primary_profile_file_from_dir(reference_profile_dir, flags); + if (fd < 0) { + return -1; + } + if (read_write) { + // Fix the owner. + if (fchown(fd, uid, uid) < 0) { + close(fd); + return -1; + } + } + return fd; +} + +static void open_profile_files(uid_t uid, const char* pkgname, + /*out*/ std::vector<fd_t>* profiles_fd, /*out*/ fd_t* reference_profile_fd) { + // Open the reference profile in read-write mode as profman might need to save the merge. + *reference_profile_fd = open_reference_profile(uid, pkgname, /*read_write*/ true); + if (*reference_profile_fd < 0) { + // We can't access the reference profile file. + return; + } + + std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr); + for (auto user : users) { + fd_t profile_fd = open_primary_profile_file(user, pkgname); + // Add to the lists only if both fds are valid. + if (profile_fd >= 0) { + profiles_fd->push_back(profile_fd); + } + } +} + +static void drop_capabilities(uid_t uid) { + if (setgid(uid) != 0) { + ALOGE("setgid(%d) failed in installd during dexopt\n", uid); + exit(64); + } + if (setuid(uid) != 0) { + ALOGE("setuid(%d) failed in installd during dexopt\n", uid); + exit(65); + } + // drop capabilities + struct __user_cap_header_struct capheader; + struct __user_cap_data_struct capdata[2]; + memset(&capheader, 0, sizeof(capheader)); + memset(&capdata, 0, sizeof(capdata)); + capheader.version = _LINUX_CAPABILITY_VERSION_3; + if (capset(&capheader, &capdata[0]) < 0) { + ALOGE("capset failed: %s\n", strerror(errno)); + exit(66); + } +} + +static constexpr int PROFMAN_BIN_RETURN_CODE_COMPILE = 0; +static constexpr int PROFMAN_BIN_RETURN_CODE_SKIP_COMPILATION = 1; +static constexpr int PROFMAN_BIN_RETURN_CODE_BAD_PROFILES = 2; +static constexpr int PROFMAN_BIN_RETURN_CODE_ERROR_IO = 3; +static constexpr int PROFMAN_BIN_RETURN_CODE_ERROR_LOCKING = 4; + +static void run_profman_merge(const std::vector<fd_t>& profiles_fd, fd_t reference_profile_fd) { + static const size_t MAX_INT_LEN = 32; + static const char* PROFMAN_BIN = "/system/bin/profman"; + + std::vector<std::string> profile_args(profiles_fd.size()); + char profile_buf[strlen("--profile-file-fd=") + MAX_INT_LEN]; + for (size_t k = 0; k < profiles_fd.size(); k++) { + sprintf(profile_buf, "--profile-file-fd=%d", profiles_fd[k]); + profile_args[k].assign(profile_buf); + } + char reference_profile_arg[strlen("--reference-profile-file-fd=") + MAX_INT_LEN]; + sprintf(reference_profile_arg, "--reference-profile-file-fd=%d", reference_profile_fd); + + // program name, reference profile fd, the final NULL and the profile fds + const char* argv[3 + profiles_fd.size()]; + int i = 0; + argv[i++] = PROFMAN_BIN; + argv[i++] = reference_profile_arg; + for (size_t k = 0; k < profile_args.size(); k++) { + argv[i++] = profile_args[k].c_str(); + } + // Do not add after dex2oat_flags, they should override others for debugging. + argv[i] = NULL; + + execv(PROFMAN_BIN, (char * const *)argv); + ALOGE("execv(%s) failed: %s\n", PROFMAN_BIN, strerror(errno)); + exit(68); /* only get here on exec failure */ +} + +// Decides if profile guided compilation is needed or not based on existing profiles. +// Returns true if there is enough information in the current profiles that worth +// a re-compilation of the package. +// If the return value is true all the current profiles would have been merged into +// the reference profiles accessible with open_reference_profile(). +static bool analyse_profiles(uid_t uid, const char* pkgname) { + std::vector<fd_t> profiles_fd; + fd_t reference_profile_fd = -1; + open_profile_files(uid, pkgname, &profiles_fd, &reference_profile_fd); + if (profiles_fd.empty() || (reference_profile_fd == -1)) { + // Skip profile guided compilation because no profiles were found. + // Or if the reference profile info couldn't be opened. + close_all_fds(profiles_fd, "profiles_fd"); + if ((reference_profile_fd != - 1) && (close(reference_profile_fd) != 0)) { + PLOG(WARNING) << "Failed to close fd for reference profile"; + } + return false; + } + + ALOGV("PROFMAN (MERGE): --- BEGIN '%s' ---\n", pkgname); + + pid_t pid = fork(); + if (pid == 0) { + /* child -- drop privileges before continuing */ + drop_capabilities(uid); + run_profman_merge(profiles_fd, reference_profile_fd); + exit(68); /* only get here on exec failure */ + } + /* parent */ + int return_code = wait_child(pid); + bool need_to_compile = false; + bool should_clear_current_profiles = false; + bool should_clear_reference_profile = false; + if (!WIFEXITED(return_code)) { + LOG(WARNING) << "profman failed for package " << pkgname << ": " << return_code; + } else { + return_code = WEXITSTATUS(return_code); + switch (return_code) { + case PROFMAN_BIN_RETURN_CODE_COMPILE: + need_to_compile = true; + should_clear_current_profiles = true; + should_clear_reference_profile = false; + break; + case PROFMAN_BIN_RETURN_CODE_SKIP_COMPILATION: + need_to_compile = false; + should_clear_current_profiles = false; + should_clear_reference_profile = false; + break; + case PROFMAN_BIN_RETURN_CODE_BAD_PROFILES: + LOG(WARNING) << "Bad profiles for package " << pkgname; + need_to_compile = false; + should_clear_current_profiles = true; + should_clear_reference_profile = true; + break; + case PROFMAN_BIN_RETURN_CODE_ERROR_IO: // fall-through + case PROFMAN_BIN_RETURN_CODE_ERROR_LOCKING: + // Temporary IO problem (e.g. locking). Ignore but log a warning. + LOG(WARNING) << "IO error while reading profiles for package " << pkgname; + need_to_compile = false; + should_clear_current_profiles = false; + should_clear_reference_profile = false; + break; + default: + // Unknown return code or error. Unlink profiles. + LOG(WARNING) << "Unknown error code while processing profiles for package " << pkgname + << ": " << return_code; + need_to_compile = false; + should_clear_current_profiles = true; + should_clear_reference_profile = true; + break; + } + } + close_all_fds(profiles_fd, "profiles_fd"); + if (close(reference_profile_fd) != 0) { + PLOG(WARNING) << "Failed to close fd for reference profile"; + } + if (should_clear_current_profiles) { + clear_current_profiles(pkgname); + } + if (should_clear_reference_profile) { + clear_reference_profile(pkgname); + } + return need_to_compile; +} + +static void run_profman_dump(const std::vector<fd_t>& profile_fds, + fd_t reference_profile_fd, + const std::vector<std::string>& dex_locations, + const std::vector<fd_t>& apk_fds, + fd_t output_fd) { + std::vector<std::string> profman_args; + static const char* PROFMAN_BIN = "/system/bin/profman"; + profman_args.push_back(PROFMAN_BIN); + profman_args.push_back("--dump-only"); + profman_args.push_back(StringPrintf("--dump-output-to-fd=%d", output_fd)); + if (reference_profile_fd != -1) { + profman_args.push_back(StringPrintf("--reference-profile-file-fd=%d", + reference_profile_fd)); + } + for (fd_t profile_fd : profile_fds) { + profman_args.push_back(StringPrintf("--profile-file-fd=%d", profile_fd)); + } + for (const std::string& dex_location : dex_locations) { + profman_args.push_back(StringPrintf("--dex-location=%s", dex_location.c_str())); + } + for (fd_t apk_fd : apk_fds) { + profman_args.push_back(StringPrintf("--apk-fd=%d", apk_fd)); + } + const char **argv = new const char*[profman_args.size() + 1]; + size_t i = 0; + for (const std::string& profman_arg : profman_args) { + argv[i++] = profman_arg.c_str(); + } + argv[i] = NULL; + + execv(PROFMAN_BIN, (char * const *)argv); + ALOGE("execv(%s) failed: %s\n", PROFMAN_BIN, strerror(errno)); + exit(68); /* only get here on exec failure */ +} + +static const char* get_location_from_path(const char* path) { + static constexpr char kLocationSeparator = '/'; + const char *location = strrchr(path, kLocationSeparator); + if (location == NULL) { + return path; + } else { + // Skip the separator character. + return location + 1; + } +} + +// Dumps the contents of a profile file, using pkgname's dex files for pretty +// printing the result. +binder::Status InstalldNativeService::dumpProfiles(int32_t uid, const std::string& packageName, + const std::string& codePaths, bool* _aidl_return) { + ENFORCE_UID(AID_SYSTEM); + + const char* pkgname = packageName.c_str(); + const char* code_path_string = codePaths.c_str(); + + std::vector<fd_t> profile_fds; + fd_t reference_profile_fd = -1; + std::string out_file_name = StringPrintf("/data/misc/profman/%s.txt", pkgname); + + ALOGV("PROFMAN (DUMP): --- BEGIN '%s' ---\n", pkgname); + + open_profile_files(uid, pkgname, &profile_fds, &reference_profile_fd); + + const bool has_reference_profile = (reference_profile_fd != -1); + const bool has_profiles = !profile_fds.empty(); + + if (!has_reference_profile && !has_profiles) { + ALOGE("profman dump: no profiles to dump for '%s'", pkgname); + *_aidl_return = false; + return binder::Status::ok(); + } + + fd_t output_fd = open(out_file_name.c_str(), O_WRONLY | O_CREAT | O_TRUNC | O_NOFOLLOW); + if (fchmod(output_fd, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) < 0) { + ALOGE("installd cannot chmod '%s' dump_profile\n", out_file_name.c_str()); + *_aidl_return = false; + return binder::Status::ok(); + } + std::vector<std::string> code_full_paths = base::Split(code_path_string, ";"); + std::vector<std::string> dex_locations; + std::vector<fd_t> apk_fds; + for (const std::string& code_full_path : code_full_paths) { + const char* full_path = code_full_path.c_str(); + fd_t apk_fd = open(full_path, O_RDONLY | O_NOFOLLOW); + if (apk_fd == -1) { + ALOGE("installd cannot open '%s'\n", full_path); + *_aidl_return = false; + return binder::Status::ok(); + } + dex_locations.push_back(get_location_from_path(full_path)); + apk_fds.push_back(apk_fd); + } + + pid_t pid = fork(); + if (pid == 0) { + /* child -- drop privileges before continuing */ + drop_capabilities(uid); + run_profman_dump(profile_fds, reference_profile_fd, dex_locations, + apk_fds, output_fd); + exit(68); /* only get here on exec failure */ + } + /* parent */ + close_all_fds(apk_fds, "apk_fds"); + close_all_fds(profile_fds, "profile_fds"); + if (close(reference_profile_fd) != 0) { + PLOG(WARNING) << "Failed to close fd for reference profile"; + } + int return_code = wait_child(pid); + if (!WIFEXITED(return_code)) { + LOG(WARNING) << "profman failed for package " << pkgname << ": " + << return_code; + *_aidl_return = false; + return binder::Status::ok(); + } + *_aidl_return = true; + return binder::Status::ok(); +} + +static std::string replace_file_extension(const std::string& oat_path, const std::string& new_ext) { + // A standard dalvik-cache entry. Replace ".dex" with `new_ext`. + if (EndsWith(oat_path, ".dex")) { + std::string new_path = oat_path; + new_path.replace(new_path.length() - strlen(".dex"), strlen(".dex"), new_ext); + CHECK(EndsWith(new_path, new_ext.c_str())); + return new_path; + } + + // An odex entry. Not that this may not be an extension, e.g., in the OTA + // case (where the base name will have an extension for the B artifact). + size_t odex_pos = oat_path.rfind(".odex"); + if (odex_pos != std::string::npos) { + std::string new_path = oat_path; + new_path.replace(odex_pos, strlen(".odex"), new_ext); + CHECK_NE(new_path.find(new_ext), std::string::npos); + return new_path; + } + + // Don't know how to handle this. + return ""; +} + +// Translate the given oat path to an art (app image) path. An empty string +// denotes an error. +static std::string create_image_filename(const std::string& oat_path) { + return replace_file_extension(oat_path, ".art"); +} + +// Translate the given oat path to a vdex path. An empty string denotes an error. +static std::string create_vdex_filename(const std::string& oat_path) { + return replace_file_extension(oat_path, ".vdex"); +} + +static bool add_extension_to_file_name(char* file_name, const char* extension) { + if (strlen(file_name) + strlen(extension) + 1 > PKG_PATH_MAX) { + return false; + } + strcat(file_name, extension); + return true; +} + +static int open_output_file(const char* file_name, bool recreate, int permissions) { + int flags = O_RDWR | O_CREAT; + if (recreate) { + if (unlink(file_name) < 0) { + if (errno != ENOENT) { + PLOG(ERROR) << "open_output_file: Couldn't unlink " << file_name; + } + } + flags |= O_EXCL; + } + return open(file_name, flags, permissions); +} + +static bool set_permissions_and_ownership(int fd, bool is_public, int uid, const char* path) { + if (fchmod(fd, + S_IRUSR|S_IWUSR|S_IRGRP | + (is_public ? S_IROTH : 0)) < 0) { + ALOGE("installd cannot chmod '%s' during dexopt\n", path); + return false; + } else if (fchown(fd, AID_SYSTEM, uid) < 0) { + ALOGE("installd cannot chown '%s' during dexopt\n", path); + return false; + } + return true; +} + +static bool IsOutputDalvikCache(const char* oat_dir) { + // InstallerConnection.java (which invokes installd) transforms Java null arguments + // into '!'. Play it safe by handling it both. + // TODO: ensure we never get null. + // TODO: pass a flag instead of inferring if the output is dalvik cache. + return oat_dir == nullptr || oat_dir[0] == '!'; +} + +static bool create_oat_out_path(const char* apk_path, const char* instruction_set, + const char* oat_dir, /*out*/ char* out_oat_path) { + // Early best-effort check whether we can fit the the path into our buffers. + // Note: the cache path will require an additional 5 bytes for ".swap", but we'll try to run + // without a swap file, if necessary. Reference profiles file also add an extra ".prof" + // extension to the cache path (5 bytes). + if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) { + ALOGE("apk_path too long '%s'\n", apk_path); + return false; + } + + if (!IsOutputDalvikCache(oat_dir)) { + if (validate_apk_path(oat_dir)) { + ALOGE("cannot validate apk path with oat_dir '%s'\n", oat_dir); + return false; + } + if (!calculate_oat_file_path(out_oat_path, oat_dir, apk_path, instruction_set)) { + return false; + } + } else { + if (!create_cache_path(out_oat_path, apk_path, instruction_set)) { + return false; + } + } + return true; +} + +// TODO: Consider returning error codes. +binder::Status InstalldNativeService::mergeProfiles(int32_t uid, const std::string& packageName, + bool* _aidl_return) { + ENFORCE_UID(AID_SYSTEM); + const char* pkgname = packageName.c_str(); + *_aidl_return = analyse_profiles(uid, pkgname); + return binder::Status::ok(); +} + +// Helper for fd management. This is similar to a unique_fd in that it closes the file descriptor +// on destruction. It will also run the given cleanup (unless told not to) after closing. +// +// Usage example: +// +// Dex2oatFileWrapper<std::function<void ()>> file(open(...), +// [name]() { +// unlink(name.c_str()); +// }); +// // Note: care needs to be taken about name, as it needs to have a lifetime longer than the +// wrapper if captured as a reference. +// +// if (file.get() == -1) { +// // Error opening... +// } +// +// ... +// if (error) { +// // At this point, when the Dex2oatFileWrapper is destructed, the cleanup function will run +// // and delete the file (after the fd is closed). +// return -1; +// } +// +// (Success case) +// file.SetCleanup(false); +// // At this point, when the Dex2oatFileWrapper is destructed, the cleanup function will not run +// // (leaving the file around; after the fd is closed). +// +template <typename Cleanup> +class Dex2oatFileWrapper { + public: + Dex2oatFileWrapper() : value_(-1), cleanup_(), do_cleanup_(true) { + } + + Dex2oatFileWrapper(int value, Cleanup cleanup) + : value_(value), cleanup_(cleanup), do_cleanup_(true) {} + + ~Dex2oatFileWrapper() { + reset(-1); + } + + int get() { + return value_; + } + + void SetCleanup(bool cleanup) { + do_cleanup_ = cleanup; + } + + void reset(int new_value) { + if (value_ >= 0) { + close(value_); + } + if (do_cleanup_ && cleanup_ != nullptr) { + cleanup_(); + } + + value_ = new_value; + } + + void reset(int new_value, Cleanup new_cleanup) { + if (value_ >= 0) { + close(value_); + } + if (do_cleanup_ && cleanup_ != nullptr) { + cleanup_(); + } + + value_ = new_value; + cleanup_ = new_cleanup; + } + + private: + int value_; + Cleanup cleanup_; + bool do_cleanup_; +}; + +// TODO: eventually move dexopt() implementation into dexopt.cpp +int dexopt(const char* apk_path, uid_t uid, const char* pkgname, const char* instruction_set, + int dexopt_needed, const char* oat_dir, int dexopt_flags,const char* compiler_filter, + const char* volume_uuid ATTRIBUTE_UNUSED, const char* shared_libraries) { + bool is_public = ((dexopt_flags & DEXOPT_PUBLIC) != 0); + bool vm_safe_mode = (dexopt_flags & DEXOPT_SAFEMODE) != 0; + bool debuggable = (dexopt_flags & DEXOPT_DEBUGGABLE) != 0; + bool boot_complete = (dexopt_flags & DEXOPT_BOOTCOMPLETE) != 0; + bool profile_guided = (dexopt_flags & DEXOPT_PROFILE_GUIDED) != 0; + + CHECK(pkgname != nullptr); + CHECK(pkgname[0] != 0); + + // Public apps should not be compiled with profile information ever. Same goes for the special + // package '*' used for the system server. + Dex2oatFileWrapper<std::function<void ()>> reference_profile_fd; + if (!is_public && pkgname[0] != '*') { + // Open reference profile in read only mode as dex2oat does not get write permissions. + const std::string pkgname_str(pkgname); + reference_profile_fd.reset(open_reference_profile(uid, pkgname, /*read_write*/ false), + [pkgname_str]() { + clear_reference_profile(pkgname_str.c_str()); + }); + // Note: it's OK to not find a profile here. + } + + if ((dexopt_flags & ~DEXOPT_MASK) != 0) { + LOG_FATAL("dexopt flags contains unknown fields\n"); + } + + char out_oat_path[PKG_PATH_MAX]; + if (!create_oat_out_path(apk_path, instruction_set, oat_dir, out_oat_path)) { + return false; + } + + const char *input_file; + char in_odex_path[PKG_PATH_MAX]; + int dexopt_action = abs(dexopt_needed); + bool is_odex_location = dexopt_needed < 0; + switch (dexopt_action) { + case DEX2OAT_FROM_SCRATCH: + case DEX2OAT_FOR_BOOT_IMAGE: + case DEX2OAT_FOR_FILTER: + case DEX2OAT_FOR_RELOCATION: + input_file = apk_path; + break; + + case PATCHOAT_FOR_RELOCATION: + if (is_odex_location) { + if (!calculate_odex_file_path(in_odex_path, apk_path, instruction_set)) { + return -1; + } + input_file = in_odex_path; + } else { + input_file = out_oat_path; + } + break; + + default: + ALOGE("Invalid dexopt needed: %d\n", dexopt_needed); + return 72; + } + + struct stat input_stat; + memset(&input_stat, 0, sizeof(input_stat)); + stat(input_file, &input_stat); + + // Open the input file. If running dex2oat, `input_file` is the APK. If running + // patchoat, it is the OAT file to be relocated. + base::unique_fd input_fd(open(input_file, O_RDONLY, 0)); + if (input_fd.get() < 0) { + ALOGE("installd cannot open '%s' for input during dexopt\n", input_file); + return -1; + } + + // Create the output OAT file. + const std::string out_oat_path_str(out_oat_path); + Dex2oatFileWrapper<std::function<void ()>> out_oat_fd( + open_output_file(out_oat_path, /*recreate*/true, /*permissions*/0644), + [out_oat_path_str]() { unlink(out_oat_path_str.c_str()); }); + if (out_oat_fd.get() < 0) { + ALOGE("installd cannot open '%s' for output during dexopt\n", out_oat_path); + return -1; + } + if (!set_permissions_and_ownership(out_oat_fd.get(), is_public, uid, out_oat_path)) { + return -1; + } + + // Open the existing VDEX. We do this before creating the new output VDEX, which will + // unlink the old one. + base::unique_fd in_vdex_fd; + std::string in_vdex_path_str; + if (dexopt_action == PATCHOAT_FOR_RELOCATION) { + // `input_file` is the OAT file to be relocated. The VDEX has to be there as well. + in_vdex_path_str = create_vdex_filename(input_file); + if (in_vdex_path_str.empty()) { + ALOGE("installd cannot compute input vdex location for '%s'\n", input_file); + return -1; + } + in_vdex_fd.reset(open(in_vdex_path_str.c_str(), O_RDONLY, 0)); + if (in_vdex_fd.get() < 0) { + ALOGE("installd cannot open '%s' for input during dexopt: %s\n", + in_vdex_path_str.c_str(), strerror(errno)); + return -1; + } + } else if (dexopt_action != DEX2OAT_FROM_SCRATCH) { + // Open the possibly existing vdex. If none exist, we pass -1 to dex2oat for input-vdex-fd. + const char* path = nullptr; + if (is_odex_location) { + if (calculate_odex_file_path(in_odex_path, apk_path, instruction_set)) { + path = in_odex_path; + } else { + ALOGE("installd cannot compute input vdex location for '%s'\n", apk_path); + return -1; + } + } else { + path = out_oat_path; + } + in_vdex_path_str = create_vdex_filename(path); + if (in_vdex_path_str.empty()) { + ALOGE("installd cannot compute input vdex location for '%s'\n", path); + return -1; + } + in_vdex_fd.reset(open(in_vdex_path_str.c_str(), O_RDONLY, 0)); + } + + // Infer the name of the output VDEX and create it. + const std::string out_vdex_path_str = create_vdex_filename(out_oat_path_str); + if (out_vdex_path_str.empty()) { + return -1; + } + Dex2oatFileWrapper<std::function<void ()>> out_vdex_fd( + open_output_file(out_vdex_path_str.c_str(), /*recreate*/true, /*permissions*/0644), + [out_vdex_path_str]() { unlink(out_vdex_path_str.c_str()); }); + if (out_vdex_fd.get() < 0) { + ALOGE("installd cannot open '%s' for output during dexopt\n", out_vdex_path_str.c_str()); + return -1; + } + if (!set_permissions_and_ownership(out_vdex_fd.get(), is_public, + uid, out_vdex_path_str.c_str())) { + return -1; + } + + // Create a swap file if necessary. + base::unique_fd swap_fd; + if (ShouldUseSwapFileForDexopt()) { + // Make sure there really is enough space. + char swap_file_name[PKG_PATH_MAX]; + strcpy(swap_file_name, out_oat_path); + if (add_extension_to_file_name(swap_file_name, ".swap")) { + swap_fd.reset(open_output_file(swap_file_name, /*recreate*/true, /*permissions*/0600)); + } + if (swap_fd.get() < 0) { + // Could not create swap file. Optimistically go on and hope that we can compile + // without it. + ALOGE("installd could not create '%s' for swap during dexopt\n", swap_file_name); + } else { + // Immediately unlink. We don't really want to hit flash. + if (unlink(swap_file_name) < 0) { + PLOG(ERROR) << "Couldn't unlink swap file " << swap_file_name; + } + } + } + + // Avoid generating an app image for extract only since it will not contain any classes. + Dex2oatFileWrapper<std::function<void ()>> image_fd; + const std::string image_path = create_image_filename(out_oat_path); + if (dexopt_action != PATCHOAT_FOR_RELOCATION && !image_path.empty()) { + char app_image_format[kPropertyValueMax]; + bool have_app_image_format = + get_property("dalvik.vm.appimageformat", app_image_format, NULL) > 0; + // Use app images only if it is enabled (by a set image format) and we are compiling + // profile-guided (so the app image doesn't conservatively contain all classes). + if (profile_guided && have_app_image_format) { + // Recreate is true since we do not want to modify a mapped image. If the app is + // already running and we modify the image file, it can cause crashes (b/27493510). + image_fd.reset(open_output_file(image_path.c_str(), + true /*recreate*/, + 0600 /*permissions*/), + [image_path]() { unlink(image_path.c_str()); } + ); + if (image_fd.get() < 0) { + // Could not create application image file. Go on since we can compile without + // it. + LOG(ERROR) << "installd could not create '" + << image_path + << "' for image file during dexopt"; + } else if (!set_permissions_and_ownership(image_fd.get(), + is_public, + uid, + image_path.c_str())) { + image_fd.reset(-1); + } + } + // If we have a valid image file path but no image fd, explicitly erase the image file. + if (image_fd.get() < 0) { + if (unlink(image_path.c_str()) < 0) { + if (errno != ENOENT) { + PLOG(ERROR) << "Couldn't unlink image file " << image_path; + } + } + } + } + + ALOGV("DexInv: --- BEGIN '%s' ---\n", input_file); + + pid_t pid = fork(); + if (pid == 0) { + /* child -- drop privileges before continuing */ + drop_capabilities(uid); + + SetDex2OatAndPatchOatScheduling(boot_complete); + if (flock(out_oat_fd.get(), LOCK_EX | LOCK_NB) != 0) { + ALOGE("flock(%s) failed: %s\n", out_oat_path, strerror(errno)); + _exit(67); + } + + if (dexopt_action == PATCHOAT_FOR_RELOCATION) { + run_patchoat(input_fd.get(), + in_vdex_fd.get(), + out_oat_fd.get(), + out_vdex_fd.get(), + input_file, + in_vdex_path_str.c_str(), + out_oat_path, + out_vdex_path_str.c_str(), + pkgname, + instruction_set); + } else { + // Pass dex2oat the relative path to the input file. + const char *input_file_name = get_location_from_path(input_file); + run_dex2oat(input_fd.get(), + out_oat_fd.get(), + in_vdex_fd.get(), + out_vdex_fd.get(), + image_fd.get(), + input_file_name, + out_oat_path, + swap_fd.get(), + instruction_set, + compiler_filter, + vm_safe_mode, + debuggable, + boot_complete, + reference_profile_fd.get(), + shared_libraries); + } + _exit(68); /* only get here on exec failure */ + } else { + int res = wait_child(pid); + if (res == 0) { + ALOGV("DexInv: --- END '%s' (success) ---\n", input_file); + } else { + ALOGE("DexInv: --- END '%s' --- status=0x%04x, process failed\n", input_file, res); + return -1; + } + } + + struct utimbuf ut; + ut.actime = input_stat.st_atime; + ut.modtime = input_stat.st_mtime; + utime(out_oat_path, &ut); + + // We've been successful, don't delete output. + out_oat_fd.SetCleanup(false); + out_vdex_fd.SetCleanup(false); + image_fd.SetCleanup(false); + reference_profile_fd.SetCleanup(false); + + return 0; +} + +binder::Status InstalldNativeService::dexopt(const std::string& apkPath, int32_t uid, + const std::unique_ptr<std::string>& packageName, const std::string& instructionSet, + int32_t dexoptNeeded, const std::unique_ptr<std::string>& outputPath, int32_t dexFlags, + const std::string& compilerFilter, const std::unique_ptr<std::string>& uuid, + const std::unique_ptr<std::string>& sharedLibraries) { + ENFORCE_UID(AID_SYSTEM); + + const char* apk_path = apkPath.c_str(); + const char* pkgname = packageName ? packageName->c_str() : "*"; + const char* instruction_set = instructionSet.c_str(); + const char* oat_dir = outputPath ? outputPath->c_str() : nullptr; + const char* compiler_filter = compilerFilter.c_str(); + const char* volume_uuid = uuid ? uuid->c_str() : nullptr; + const char* shared_libraries = sharedLibraries ? sharedLibraries->c_str() : nullptr; + + int res = android::installd::dexopt(apk_path, uid, pkgname, instruction_set, dexoptNeeded, + oat_dir, dexFlags, compiler_filter, volume_uuid, shared_libraries); + return res ? binder::Status::fromServiceSpecificError(-1) : binder::Status::ok(); +} + +binder::Status InstalldNativeService::markBootComplete(const std::string& instructionSet) { + ENFORCE_UID(AID_SYSTEM); + const char* instruction_set = instructionSet.c_str(); + + char boot_marker_path[PKG_PATH_MAX]; + sprintf(boot_marker_path, + "%s/%s/%s/.booting", + android_data_dir.path, + DALVIK_CACHE, + instruction_set); + + ALOGV("mark_boot_complete : %s", boot_marker_path); + if (unlink(boot_marker_path) != 0) { + ALOGE("Unable to unlink boot marker at %s, error=%s", boot_marker_path, strerror(errno)); + return binder::Status::fromServiceSpecificError(-1); + } + return binder::Status::ok(); +} + +void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid, + struct stat* statbuf) +{ + while (path[basepos] != 0) { + if (path[basepos] == '/') { + path[basepos] = 0; + if (lstat(path, statbuf) < 0) { + ALOGV("Making directory: %s\n", path); + if (mkdir(path, mode) == 0) { + chown(path, uid, gid); + } else { + ALOGW("Unable to make directory %s: %s\n", path, strerror(errno)); + } + } + path[basepos] = '/'; + basepos++; + } + basepos++; + } +} + +binder::Status InstalldNativeService::linkNativeLibraryDirectory( + const std::unique_ptr<std::string>& uuid, const std::string& packageName, + const std::string& nativeLibPath32, int32_t userId) { + ENFORCE_UID(AID_SYSTEM); + const char* uuid_ = uuid ? uuid->c_str() : nullptr; + const char* pkgname = packageName.c_str(); + const char* asecLibDir = nativeLibPath32.c_str(); + struct stat s, libStat; + int rc = 0; + + std::string _pkgdir(create_data_user_ce_package_path(uuid_, userId, pkgname)); + std::string _libsymlink(_pkgdir + PKG_LIB_POSTFIX); + + const char* pkgdir = _pkgdir.c_str(); + const char* libsymlink = _libsymlink.c_str(); + + if (stat(pkgdir, &s) < 0) { + return binder::Status::fromServiceSpecificError(-1); + } + + if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) { + ALOGE("failed to chown '%s': %s\n", pkgdir, strerror(errno)); + return binder::Status::fromServiceSpecificError(-1); + } + + if (chmod(pkgdir, 0700) < 0) { + ALOGE("linklib() 1: failed to chmod '%s': %s\n", pkgdir, strerror(errno)); + rc = -1; + goto out; + } + + if (lstat(libsymlink, &libStat) < 0) { + if (errno != ENOENT) { + ALOGE("couldn't stat lib dir: %s\n", strerror(errno)); + rc = -1; + goto out; + } + } else { + if (S_ISDIR(libStat.st_mode)) { + if (delete_dir_contents(libsymlink, 1, NULL) < 0) { + rc = -1; + goto out; + } + } else if (S_ISLNK(libStat.st_mode)) { + if (unlink(libsymlink) < 0) { + ALOGE("couldn't unlink lib dir: %s\n", strerror(errno)); + rc = -1; + goto out; + } + } + } + + if (symlink(asecLibDir, libsymlink) < 0) { + ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, asecLibDir, + strerror(errno)); + rc = -errno; + goto out; + } + +out: + if (chmod(pkgdir, s.st_mode) < 0) { + ALOGE("linklib() 2: failed to chmod '%s': %s\n", pkgdir, strerror(errno)); + rc = -errno; + } + + if (chown(pkgdir, s.st_uid, s.st_gid) < 0) { + ALOGE("failed to chown '%s' : %s\n", pkgdir, strerror(errno)); + rc = -errno; + } + + return rc ? binder::Status::fromServiceSpecificError(-1) : binder::Status::ok(); +} + +static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd) +{ + static const char *IDMAP_BIN = "/system/bin/idmap"; + static const size_t MAX_INT_LEN = 32; + char idmap_str[MAX_INT_LEN]; + + snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd); + + execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL); + ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno)); +} + +// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix) +// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap +static int flatten_path(const char *prefix, const char *suffix, + const char *overlay_path, char *idmap_path, size_t N) +{ + if (overlay_path == NULL || idmap_path == NULL) { + return -1; + } + const size_t len_overlay_path = strlen(overlay_path); + // will access overlay_path + 1 further below; requires absolute path + if (len_overlay_path < 2 || *overlay_path != '/') { + return -1; + } + const size_t len_idmap_root = strlen(prefix); + const size_t len_suffix = strlen(suffix); + if (SIZE_MAX - len_idmap_root < len_overlay_path || + SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) { + // additions below would cause overflow + return -1; + } + if (N < len_idmap_root + len_overlay_path + len_suffix) { + return -1; + } + memset(idmap_path, 0, N); + snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix); + char *ch = idmap_path + len_idmap_root; + while (*ch != '\0') { + if (*ch == '/') { + *ch = '@'; + } + ++ch; + } + return 0; +} + +binder::Status InstalldNativeService::idmap(const std::string& targetApkPath, + const std::string& overlayApkPath, int32_t uid) { + ENFORCE_UID(AID_SYSTEM); + const char* target_apk = targetApkPath.c_str(); + const char* overlay_apk = overlayApkPath.c_str(); + ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid); + + int idmap_fd = -1; + char idmap_path[PATH_MAX]; + + if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, + idmap_path, sizeof(idmap_path)) == -1) { + ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); + goto fail; + } + + unlink(idmap_path); + idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644); + if (idmap_fd < 0) { + ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno)); + goto fail; + } + if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) { + ALOGE("idmap cannot chown '%s'\n", idmap_path); + goto fail; + } + if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { + ALOGE("idmap cannot chmod '%s'\n", idmap_path); + goto fail; + } + + pid_t pid; + pid = fork(); + if (pid == 0) { + /* child -- drop privileges before continuing */ + if (setgid(uid) != 0) { + ALOGE("setgid(%d) failed during idmap\n", uid); + exit(1); + } + if (setuid(uid) != 0) { + ALOGE("setuid(%d) failed during idmap\n", uid); + exit(1); + } + if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) { + ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno)); + exit(1); + } + + run_idmap(target_apk, overlay_apk, idmap_fd); + exit(1); /* only if exec call to idmap failed */ + } else { + int status = wait_child(pid); + if (status != 0) { + ALOGE("idmap failed, status=0x%04x\n", status); + goto fail; + } + } + + close(idmap_fd); + return binder::Status::ok(); +fail: + if (idmap_fd >= 0) { + close(idmap_fd); + unlink(idmap_path); + } + return binder::Status::fromServiceSpecificError(-1); +} + +binder::Status InstalldNativeService::restoreconAppData(const std::unique_ptr<std::string>& uuid, + const std::string& packageName, int32_t userId, int32_t flags, int32_t appId, + const std::string& seInfo) { + ENFORCE_UID(AID_SYSTEM); + int res = 0; + + // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here. + unsigned int seflags = SELINUX_ANDROID_RESTORECON_RECURSE; + const char* uuid_ = uuid ? uuid->c_str() : nullptr; + const char* pkgName = packageName.c_str(); + const char* seinfo = seInfo.c_str(); + + if (!pkgName || !seinfo) { + ALOGE("Package name or seinfo tag is null when trying to restorecon."); + return binder::Status::fromServiceSpecificError(-1); + } + + uid_t uid = multiuser_get_uid(userId, appId); + if (flags & FLAG_STORAGE_CE) { + auto path = create_data_user_ce_package_path(uuid_, userId, pkgName); + if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { + PLOG(ERROR) << "restorecon failed for " << path; + res = -1; + } + } + if (flags & FLAG_STORAGE_DE) { + auto path = create_data_user_de_package_path(uuid_, userId, pkgName); + if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) { + PLOG(ERROR) << "restorecon failed for " << path; + // TODO: include result once 25796509 is fixed + } + } + return res ? binder::Status::fromServiceSpecificError(-1) : binder::Status::ok(); +} + +binder::Status InstalldNativeService::createOatDir(const std::string& oatDir, + const std::string& instructionSet) { + ENFORCE_UID(AID_SYSTEM); + const char* oat_dir = oatDir.c_str(); + const char* instruction_set = instructionSet.c_str(); + char oat_instr_dir[PKG_PATH_MAX]; + + if (validate_apk_path(oat_dir)) { + ALOGE("invalid apk path '%s' (bad prefix)\n", oat_dir); + return binder::Status::fromServiceSpecificError(-1); + } + if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { + return binder::Status::fromServiceSpecificError(-1); + } + if (selinux_android_restorecon(oat_dir, 0)) { + ALOGE("cannot restorecon dir '%s': %s\n", oat_dir, strerror(errno)); + return binder::Status::fromServiceSpecificError(-1); + } + snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set); + if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { + return binder::Status::fromServiceSpecificError(-1); + } + return binder::Status::ok(); +} + +binder::Status InstalldNativeService::rmPackageDir(const std::string& packageDir) { + ENFORCE_UID(AID_SYSTEM); + const char* apk_path = packageDir.c_str(); + if (validate_apk_path(apk_path)) { + ALOGE("invalid apk path '%s' (bad prefix)\n", apk_path); + return binder::Status::fromServiceSpecificError(-1); + } + int res = delete_dir_contents(apk_path, 1 /* also_delete_dir */, + NULL /* exclusion_predicate */); + return res ? binder::Status::fromServiceSpecificError(-1) : binder::Status::ok(); +} + +binder::Status InstalldNativeService::linkFile(const std::string& relativePath, + const std::string& fromBase, const std::string& toBase) { + ENFORCE_UID(AID_SYSTEM); + const char* relative_path = relativePath.c_str(); + const char* from_base = fromBase.c_str(); + const char* to_base = toBase.c_str(); + char from_path[PKG_PATH_MAX]; + char to_path[PKG_PATH_MAX]; + snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path); + snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path); + + if (validate_apk_path_subdirs(from_path)) { + ALOGE("invalid app data sub-path '%s' (bad prefix)\n", from_path); + return binder::Status::fromServiceSpecificError(-1); + } + + if (validate_apk_path_subdirs(to_path)) { + ALOGE("invalid app data sub-path '%s' (bad prefix)\n", to_path); + return binder::Status::fromServiceSpecificError(-1); + } + + const int ret = link(from_path, to_path); + if (ret < 0) { + ALOGE("link(%s, %s) failed : %s", from_path, to_path, strerror(errno)); + return binder::Status::fromServiceSpecificError(-1); + } + + return binder::Status::ok(); +} + +// Helper for move_ab, so that we can have common failure-case cleanup. +static bool unlink_and_rename(const char* from, const char* to) { + // Check whether "from" exists, and if so whether it's regular. If it is, unlink. Otherwise, + // return a failure. + struct stat s; + if (stat(to, &s) == 0) { + if (!S_ISREG(s.st_mode)) { + LOG(ERROR) << from << " is not a regular file to replace for A/B."; + return false; + } + if (unlink(to) != 0) { + LOG(ERROR) << "Could not unlink " << to << " to move A/B."; + return false; + } + } else { + // This may be a permission problem. We could investigate the error code, but we'll just + // let the rename failure do the work for us. + } + + // Try to rename "to" to "from." + if (rename(from, to) != 0) { + PLOG(ERROR) << "Could not rename " << from << " to " << to; + return false; + } + return true; +} + +// Move/rename a B artifact (from) to an A artifact (to). +static bool move_ab_path(const std::string& b_path, const std::string& a_path) { + // Check whether B exists. + { + struct stat s; + if (stat(b_path.c_str(), &s) != 0) { + // Silently ignore for now. The service calling this isn't smart enough to understand + // lack of artifacts at the moment. + return false; + } + if (!S_ISREG(s.st_mode)) { + LOG(ERROR) << "A/B artifact " << b_path << " is not a regular file."; + // Try to unlink, but swallow errors. + unlink(b_path.c_str()); + return false; + } + } + + // Rename B to A. + if (!unlink_and_rename(b_path.c_str(), a_path.c_str())) { + // Delete the b_path so we don't try again (or fail earlier). + if (unlink(b_path.c_str()) != 0) { + PLOG(ERROR) << "Could not unlink " << b_path; + } + + return false; + } + + return true; +} + +binder::Status InstalldNativeService::moveAb(const std::string& apkPath, + const std::string& instructionSet, const std::string& outputPath) { + ENFORCE_UID(AID_SYSTEM); + const char* apk_path = apkPath.c_str(); + const char* instruction_set = instructionSet.c_str(); + const char* oat_dir = outputPath.c_str(); + + // Get the current slot suffix. No suffix, no A/B. + std::string slot_suffix; + { + char buf[kPropertyValueMax]; + if (get_property("ro.boot.slot_suffix", buf, nullptr) <= 0) { + return binder::Status::fromServiceSpecificError(-1); + } + slot_suffix = buf; + + if (!ValidateTargetSlotSuffix(slot_suffix)) { + LOG(ERROR) << "Target slot suffix not legal: " << slot_suffix; + return binder::Status::fromServiceSpecificError(-1); + } + } + + // Validate other inputs. + if (validate_apk_path(apk_path) != 0) { + LOG(ERROR) << "invalid apk_path " << apk_path; + return binder::Status::fromServiceSpecificError(-1); + } + if (validate_apk_path(oat_dir) != 0) { + LOG(ERROR) << "invalid oat_dir " << oat_dir; + return binder::Status::fromServiceSpecificError(-1); + } + + char a_path[PKG_PATH_MAX]; + if (!calculate_oat_file_path(a_path, oat_dir, apk_path, instruction_set)) { + return binder::Status::fromServiceSpecificError(-1); + } + const std::string a_vdex_path = create_vdex_filename(a_path); + const std::string a_image_path = create_image_filename(a_path); + + // B path = A path + slot suffix. + const std::string b_path = StringPrintf("%s.%s", a_path, slot_suffix.c_str()); + const std::string b_vdex_path = StringPrintf("%s.%s", a_vdex_path.c_str(), slot_suffix.c_str()); + const std::string b_image_path = StringPrintf("%s.%s", + a_image_path.c_str(), + slot_suffix.c_str()); + + bool success = true; + if (move_ab_path(b_path, a_path)) { + if (move_ab_path(b_vdex_path, a_vdex_path)) { + // Note: we can live without an app image. As such, ignore failure to move the image file. + // If we decide to require the app image, or the app image being moved correctly, + // then change accordingly. + constexpr bool kIgnoreAppImageFailure = true; + + if (!a_image_path.empty()) { + if (!move_ab_path(b_image_path, a_image_path)) { + unlink(a_image_path.c_str()); + if (!kIgnoreAppImageFailure) { + success = false; + } + } + } + } else { + // Cleanup: delete B image, ignore errors. + unlink(b_image_path.c_str()); + success = false; + } + } else { + // Cleanup: delete B image, ignore errors. + unlink(b_vdex_path.c_str()); + unlink(b_image_path.c_str()); + success = false; + } + + return success ? binder::Status::ok() : binder::Status::fromServiceSpecificError(-1); +} + +binder::Status InstalldNativeService::deleteOdex(const std::string& apkPath, + const std::string& instructionSet, const std::string& outputPath) { + ENFORCE_UID(AID_SYSTEM); + const char* apk_path = apkPath.c_str(); + const char* instruction_set = instructionSet.c_str(); + const char* oat_dir = outputPath.c_str(); + + // Delete the oat/odex file. + char out_path[PKG_PATH_MAX]; + if (!create_oat_out_path(apk_path, instruction_set, oat_dir, out_path)) { + return binder::Status::fromServiceSpecificError(-1); + } + + // In case of a permission failure report the issue. Otherwise just print a warning. + auto unlink_and_check = [](const char* path) -> bool { + int result = unlink(path); + if (result != 0) { + if (errno == EACCES || errno == EPERM) { + PLOG(ERROR) << "Could not unlink " << path; + return false; + } + PLOG(WARNING) << "Could not unlink " << path; + } + return true; + }; + + // Delete the oat/odex file. + bool return_value_oat = unlink_and_check(out_path); + + // Derive and delete the app image. + bool return_value_art = unlink_and_check(create_image_filename(out_path).c_str()); + + // Report success. + bool success = return_value_oat && return_value_art; + return success ? binder::Status::ok() : binder::Status::fromServiceSpecificError(-1); +} + +} // namespace installd +} // namespace android |