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android / platform / frameworks / native / refs/heads/main / . / cmds / installd / InstalldNativeService.cpp
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/*
** 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 <fts.h>
#include <inttypes.h>
#include <linux/fsverity.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/capability.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/xattr.h>
#include <unistd.h>
#include <algorithm>
#include <filesystem>
#include <fstream>
#include <functional>
#include <regex>
#include <thread>
#include <unordered_set>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/parseint.h>
#include <android-base/properties.h>
#include <android-base/scopeguard.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <android-base/unique_fd.h>
#include <cutils/ashmem.h>
#include <cutils/fs.h>
#include <cutils/misc.h>
#include <cutils/properties.h>
#include <cutils/sched_policy.h>
#include <linux/quota.h>
#include <log/log.h> // TODO: Move everything to base/logging.
#include <logwrap/logwrap.h>
#include <private/android_filesystem_config.h>
#include <private/android_projectid_config.h>
#include <selinux/android.h>
#include <system/thread_defs.h>
#include <utils/Trace.h>
#include "dexopt.h"
#include "globals.h"
#include "installd_deps.h"
#include "otapreopt_utils.h"
#include "utils.h"
#include "CacheTracker.h"
#include "CrateManager.h"
#include "MatchExtensionGen.h"
#include "QuotaUtils.h"
#include "SysTrace.h"
#ifndef LOG_TAG
#define LOG_TAG "installd"
#endif
#define GRANULAR_LOCKS
using android::base::ParseUint;
using android::base::Split;
using android::base::StringPrintf;
using android::base::unique_fd;
using android::os::ParcelFileDescriptor;
using std::endl;
namespace android {
namespace installd {
// An uuid used in unit tests.
static constexpr const char* kTestUuid = "TEST";
static constexpr const mode_t kRollbackFolderMode = 0700;
static constexpr const char* kCpPath = "/system/bin/cp";
static constexpr const char* kXattrDefault = "user.default";
static constexpr const char* kDataMirrorCePath = "/data_mirror/data_ce";
static constexpr const char* kDataMirrorDePath = "/data_mirror/data_de";
static constexpr const char* kMiscMirrorCePath = "/data_mirror/misc_ce";
static constexpr const char* kMiscMirrorDePath = "/data_mirror/misc_de";
static constexpr const int MIN_RESTRICTED_HOME_SDK_VERSION = 24; // > M
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* kFuseProp = "persist.sys.fuse";
/**
* Property to control if app data isolation is enabled.
*/
static constexpr const char* kAppDataIsolationEnabledProperty = "persist.zygote.app_data_isolation";
static constexpr const char* kMntSdcardfs = "/mnt/runtime/default/";
static constexpr const char* kMntFuse = "/mnt/pass_through/0/";
static std::atomic<bool> sAppDataIsolationEnabled(false);
/**
* Flag to control if project ids are supported for internal storage
*/
static std::atomic<bool> sUsingProjectIdsFlag(false);
static std::once_flag flag;
namespace {
static binder::Status ok() {
return binder::Status::ok();
}
static binder::Status exception(uint32_t code, const std::string& msg) {
LOG(ERROR) << msg << " (" << code << ")";
return binder::Status::fromExceptionCode(code, String8(msg.c_str()));
}
static binder::Status error() {
return binder::Status::fromServiceSpecificError(errno);
}
static binder::Status error(const std::string& msg) {
PLOG(ERROR) << msg;
return binder::Status::fromServiceSpecificError(errno, String8(msg.c_str()));
}
static binder::Status error(uint32_t code, const std::string& msg) {
LOG(ERROR) << msg << " (" << code << ")";
return binder::Status::fromServiceSpecificError(code, String8(msg.c_str()));
}
binder::Status checkUid(uid_t expectedUid) {
uid_t uid = IPCThreadState::self()->getCallingUid();
if (uid == expectedUid || uid == AID_ROOT) {
return ok();
} else {
return exception(binder::Status::EX_SECURITY,
StringPrintf("UID %d is not expected UID %d", uid, expectedUid));
}
}
binder::Status checkArgumentUuid(const std::optional<std::string>& uuid) {
if (!uuid || is_valid_filename(*uuid)) {
return ok();
} else {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
StringPrintf("UUID %s is malformed", uuid->c_str()));
}
}
binder::Status checkArgumentUuidTestOrNull(const std::optional<std::string>& uuid) {
if (!uuid || strcmp(uuid->c_str(), kTestUuid) == 0) {
return ok();
} else {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
StringPrintf("UUID must be null or \"%s\", got: %s", kTestUuid, uuid->c_str()));
}
}
binder::Status checkArgumentPackageName(const std::string& packageName) {
if (is_valid_package_name(packageName)) {
return ok();
} else {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
StringPrintf("Package name %s is malformed", packageName.c_str()));
}
}
binder::Status checkArgumentPath(const std::string& path) {
if (path.empty()) {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT, "Missing path");
}
if (path[0] != '/') {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
StringPrintf("Path %s is relative", path.c_str()));
}
if ((path + '/').find("/../") != std::string::npos) {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
StringPrintf("Path %s is shady", path.c_str()));
}
for (const char& c : path) {
if (c == '\0' || c == '\n') {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
StringPrintf("Path %s is malformed", path.c_str()));
}
}
return ok();
}
binder::Status checkArgumentPath(const std::optional<std::string>& path) {
if (path) {
return checkArgumentPath(*path);
} else {
return ok();
}
}
binder::Status checkArgumentFileName(const std::string& path) {
if (path.empty()) {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT, "Missing name");
}
for (const char& c : path) {
if (c == '\0' || c == '\n' || c == '/') {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
StringPrintf("Name %s is malformed", path.c_str()));
}
}
return ok();
}
binder::Status checkArgumentAppId(int32_t appId) {
if (FIRST_APPLICATION_UID <= appId && appId <= LAST_APPLICATION_UID) {
return ok();
}
return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
StringPrintf("appId %d is outside of the range", appId));
}
#define ENFORCE_UID(uid) { \
binder::Status status = checkUid((uid)); \
if (!status.isOk()) { \
return status; \
} \
}
// we could have tighter checks, but this is only to avoid hard errors. Negative values are defined
// in UserHandle.java and carry specific meanings that may not be handled by certain APIs here.
#define ENFORCE_VALID_USER(userId) \
{ \
if (static_cast<uid_t>(userId) >= std::numeric_limits<uid_t>::max() / AID_USER_OFFSET) { \
return error("userId invalid: " + std::to_string(userId)); \
} \
}
#define ENFORCE_VALID_USER_OR_NULL(userId) \
{ \
if (static_cast<uid_t>(userId) != USER_NULL) { \
ENFORCE_VALID_USER(userId); \
} \
}
#define CHECK_ARGUMENT_UUID(uuid) { \
binder::Status status = checkArgumentUuid((uuid)); \
if (!status.isOk()) { \
return status; \
} \
}
#define CHECK_ARGUMENT_UUID_IS_TEST_OR_NULL(uuid) { \
auto status = checkArgumentUuidTestOrNull(uuid); \
if (!status.isOk()) { \
return status; \
} \
} \
#define CHECK_ARGUMENT_PACKAGE_NAME(packageName) { \
binder::Status status = \
checkArgumentPackageName((packageName)); \
if (!status.isOk()) { \
return status; \
} \
}
#define CHECK_ARGUMENT_PATH(path) { \
binder::Status status = checkArgumentPath((path)); \
if (!status.isOk()) { \
return status; \
} \
}
#define CHECK_ARGUMENT_FILE_NAME(path) \
{ \
binder::Status status = checkArgumentFileName((path)); \
if (!status.isOk()) { \
return status; \
} \
}
#define CHECK_ARGUMENT_APP_ID(appId) \
{ \
binder::Status status = checkArgumentAppId((appId)); \
if (!status.isOk()) { \
return status; \
} \
}
#ifdef GRANULAR_LOCKS
/**
* This class obtains in constructor and keeps the local strong pointer to the RefLock.
* On destruction, it checks if there are any other strong pointers, and remove the map entry if
* this was the last one.
*/
template <class Key, class Mutex>
struct LocalLockHolder {
using WeakPointer = std::weak_ptr<Mutex>;
using StrongPointer = std::shared_ptr<Mutex>;
using Map = std::unordered_map<Key, WeakPointer>;
using MapLock = std::recursive_mutex;
LocalLockHolder(Key key, Map& map, MapLock& mapLock)
: mKey(std::move(key)), mMap(map), mMapLock(mapLock) {
std::lock_guard lock(mMapLock);
auto& weakPtr = mMap[mKey];
// Check if the RefLock is still alive.
mRefLock = weakPtr.lock();
if (!mRefLock) {
// Create a new lock.
mRefLock = std::make_shared<Mutex>();
weakPtr = mRefLock;
}
}
LocalLockHolder(LocalLockHolder&& other) noexcept
: mKey(std::move(other.mKey)),
mMap(other.mMap),
mMapLock(other.mMapLock),
mRefLock(std::move(other.mRefLock)) {
other.mRefLock.reset();
}
~LocalLockHolder() {
if (!mRefLock) {
return;
}
std::lock_guard lock(mMapLock);
// Clear the strong pointer.
mRefLock.reset();
auto found = mMap.find(mKey);
if (found == mMap.end()) {
return;
}
const auto& weakPtr = found->second;
// If this was the last pointer then it's ok to remove the map entry.
if (weakPtr.expired()) {
mMap.erase(found);
}
}
void lock() { mRefLock->lock(); }
void unlock() { mRefLock->unlock(); }
void lock_shared() { mRefLock->lock_shared(); }
void unlock_shared() { mRefLock->unlock_shared(); }
private:
Key mKey;
Map& mMap;
MapLock& mMapLock;
StrongPointer mRefLock;
};
using UserLock = LocalLockHolder<userid_t, std::shared_mutex>;
using UserWriteLockGuard = std::unique_lock<UserLock>;
using UserReadLockGuard = std::shared_lock<UserLock>;
using PackageLock = LocalLockHolder<std::string, std::recursive_mutex>;
using PackageLockGuard = std::lock_guard<PackageLock>;
#define LOCK_USER() \
UserLock localUserLock(userId, mUserIdLock, mLock); \
UserWriteLockGuard userLock(localUserLock)
#define LOCK_USER_READ() \
UserLock localUserLock(userId, mUserIdLock, mLock); \
UserReadLockGuard userLock(localUserLock)
#define LOCK_PACKAGE() \
PackageLock localPackageLock(packageName, mPackageNameLock, mLock); \
PackageLockGuard packageLock(localPackageLock)
#define LOCK_PACKAGE_USER() \
LOCK_USER_READ(); \
LOCK_PACKAGE()
#else
#define LOCK_USER() std::lock_guard lock(mLock)
#define LOCK_PACKAGE() std::lock_guard lock(mLock)
#define LOCK_PACKAGE_USER() \
(void)userId; \
std::lock_guard lock(mLock)
#endif // GRANULAR_LOCKS
} // namespace
binder::Status InstalldNativeService::FsveritySetupAuthToken::authenticate(
const ParcelFileDescriptor& authFd, int32_t uid) {
int open_flags = fcntl(authFd.get(), F_GETFL);
if (open_flags < 0) {
return exception(binder::Status::EX_SERVICE_SPECIFIC, "fcntl failed");
}
if ((open_flags & O_ACCMODE) != O_WRONLY && (open_flags & O_ACCMODE) != O_RDWR) {
return exception(binder::Status::EX_SECURITY, "Received FD with unexpected open flag");
}
if (fstat(authFd.get(), &this->mStatFromAuthFd) < 0) {
return exception(binder::Status::EX_SERVICE_SPECIFIC, "fstat failed");
}
if (!S_ISREG(this->mStatFromAuthFd.st_mode)) {
return exception(binder::Status::EX_SECURITY, "Not a regular file");
}
// Don't accept a file owned by a different app.
if (this->mStatFromAuthFd.st_uid != (uid_t)uid) {
return exception(binder::Status::EX_SERVICE_SPECIFIC, "File not owned by uid");
}
return ok();
}
bool InstalldNativeService::FsveritySetupAuthToken::isSameStat(const struct stat& st) const {
return memcmp(&st, &mStatFromAuthFd, sizeof(st)) == 0;
}
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();
sAppDataIsolationEnabled = android::base::GetBoolProperty(
kAppDataIsolationEnabledProperty, true);
return android::OK;
}
status_t InstalldNativeService::dump(int fd, const Vector<String16>& /* args */) {
{
std::lock_guard<std::recursive_mutex> lock(mMountsLock);
dprintf(fd, "Storage mounts:\n");
for (const auto& n : mStorageMounts) {
dprintf(fd, " %s = %s\n", n.first.c_str(), n.second.c_str());
}
}
{
std::lock_guard<std::recursive_mutex> lock(mQuotasLock);
dprintf(fd, "Per-UID cache quotas:\n");
for (const auto& n : mCacheQuotas) {
dprintf(fd, " %d = %" PRId64 "\n", n.first, n.second);
}
}
dprintf(fd, "is_dexopt_blocked:%d\n", android::installd::is_dexopt_blocked());
return NO_ERROR;
}
constexpr const char kXattrRestoreconInProgress[] = "user.restorecon_in_progress";
static std::string lgetfilecon(const std::string& path) {
char* context;
if (::lgetfilecon(path.c_str(), &context) < 0) {
PLOG(ERROR) << "Failed to lgetfilecon for " << path;
return {};
}
std::string result{context};
free(context);
return result;
}
static bool getRestoreconInProgress(const std::string& path) {
bool inProgress = false;
if (getxattr(path.c_str(), kXattrRestoreconInProgress, &inProgress, sizeof(inProgress)) !=
sizeof(inProgress)) {
if (errno != ENODATA) {
PLOG(ERROR) << "Failed to check in-progress restorecon for " << path;
}
return false;
}
return inProgress;
}
struct RestoreconInProgress {
explicit RestoreconInProgress(const std::string& path) : mPath(path) {
bool inProgress = true;
if (setxattr(mPath.c_str(), kXattrRestoreconInProgress, &inProgress, sizeof(inProgress),
0) != 0) {
PLOG(ERROR) << "Failed to set in-progress restorecon for " << path;
}
}
~RestoreconInProgress() {
if (removexattr(mPath.c_str(), kXattrRestoreconInProgress) < 0) {
PLOG(ERROR) << "Failed to clear in-progress restorecon for " << mPath;
}
}
private:
const std::string& mPath;
};
/**
* 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,
bool existing) {
ScopedTrace tracer("restorecon-lazy");
if (!existing) {
ScopedTrace tracer("new-path");
if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid,
SELINUX_ANDROID_RESTORECON_RECURSE) < 0) {
PLOG(ERROR) << "Failed recursive restorecon for " << path;
return -1;
}
return 0;
}
// Note that SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here.
// Check to see if there was an interrupted operation.
bool inProgress = getRestoreconInProgress(path);
std::string before, after;
if (!inProgress) {
if (before = lgetfilecon(path); before.empty()) {
PLOG(ERROR) << "Failed before getfilecon for " << path;
return -1;
}
if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid, 0) < 0) {
PLOG(ERROR) << "Failed top-level restorecon for " << path;
return -1;
}
if (after = lgetfilecon(path); after.empty()) {
PLOG(ERROR) << "Failed after getfilecon for " << path;
return -1;
}
}
// If the initial top-level restorecon above changed the label, then go
// back and restorecon everything recursively
if (inProgress || before != after) {
if (existing) {
LOG(DEBUG) << "Detected label change from " << before << " to " << after << " at "
<< path << "; running recursive restorecon";
}
auto restorecon = [path, seInfo, uid]() {
ScopedTrace tracer("label-change");
// Temporary mark the folder as "in-progress" to resume in case of reboot/other failure.
RestoreconInProgress fence(path);
if (selinux_android_restorecon_pkgdir(path.c_str(), seInfo.c_str(), uid,
SELINUX_ANDROID_RESTORECON_RECURSE) < 0) {
PLOG(ERROR) << "Failed recursive restorecon for " << path;
return -1;
}
return 0;
};
if (inProgress) {
// The previous restorecon was interrupted. It's either crashed (unlikely), or the phone
// was rebooted. Possibly because it took too much time. This time let's move it to a
// separate thread - so it won't block the rest of the OS.
std::thread(restorecon).detach();
} else {
if (int result = restorecon(); result) {
return result;
}
}
}
return 0;
}
static bool internal_storage_has_project_id() {
// The following path is populated in setFirstBoot, so if this file is present
// then project ids can be used. Using call once to cache the result of this check
// to avoid having to check the file presence again and again.
std::call_once(flag, []() {
auto using_project_ids =
StringPrintf("%smisc/installd/using_project_ids", android_data_dir.c_str());
sUsingProjectIdsFlag = access(using_project_ids.c_str(), F_OK) == 0;
});
// return sUsingProjectIdsFlag;
return false;
}
static int prepare_app_dir(const std::string& path, mode_t target_mode, uid_t uid, gid_t gid,
long project_id) {
{
ScopedTrace tracer("prepare-dir");
if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, gid) != 0) {
PLOG(ERROR) << "Failed to prepare " << path;
return -1;
}
}
if (internal_storage_has_project_id()) {
ScopedTrace tracer("set-quota");
return set_quota_project_id(path, project_id, true);
}
return 0;
}
static int prepare_app_cache_dir(const std::string& parent, const char* name, mode_t target_mode,
uid_t uid, gid_t gid, long project_id) {
auto path = StringPrintf("%s/%s", parent.c_str(), name);
int ret;
{
ScopedTrace tracer("prepare-cache-dir");
ret = prepare_app_cache_dir(parent, name, target_mode, uid, gid);
}
if (ret == 0 && internal_storage_has_project_id()) {
ScopedTrace tracer("set-quota-cache-dir");
return set_quota_project_id(path, project_id, true);
}
return ret;
}
static bool prepare_app_profile_dir(const std::string& packageName, int32_t appId, int32_t userId) {
ScopedTrace tracer("prepare-app-profile");
int32_t uid = multiuser_get_uid(userId, appId);
int shared_app_gid = multiuser_get_shared_gid(userId, appId);
if (shared_app_gid == -1) {
// TODO(calin): this should no longer be possible but do not continue if we don't get
// a valid shared gid.
PLOG(WARNING) << "Invalid shared_app_gid for " << packageName;
return true;
}
const std::string profile_dir =
create_primary_current_profile_package_dir_path(userId, packageName);
// read-write-execute only for the app user.
if (fs_prepare_dir_strict(profile_dir.c_str(), 0700, uid, uid) != 0) {
PLOG(ERROR) << "Failed to prepare " << profile_dir;
return false;
}
if (selinux_android_restorecon(profile_dir.c_str(), 0)) {
PLOG(ERROR) << "Failed to restorecon " << profile_dir;
return false;
}
const std::string ref_profile_path =
create_primary_reference_profile_package_dir_path(packageName);
// Prepare the reference profile directory. Note that we use the non strict version of
// fs_prepare_dir. This will fix the permission and the ownership to the correct values.
// This is particularly important given that in O there were some fixes for how the
// shared_app_gid is computed.
//
// Note that by the time we get here we know that we are using a correct uid (otherwise
// prepare_app_dir and the above fs_prepare_file_strict which check the uid). So we
// are sure that the gid being used belongs to the owning app and not someone else.
//
// dex2oat/profman runs under the shared app gid and it needs to read/write reference profiles.
if (fs_prepare_dir(ref_profile_path.c_str(), 0770, AID_SYSTEM, shared_app_gid) != 0) {
PLOG(ERROR) << "Failed to prepare " << ref_profile_path;
return false;
}
return true;
}
static bool chown_app_dir(const std::string& path, uid_t uid, uid_t previousUid, gid_t cacheGid) {
FTS* fts;
char *argv[] = { (char*) path.c_str(), nullptr };
if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr))) {
return false;
}
for (FTSENT* p; (p = fts_read(fts)) != nullptr;) {
if (p->fts_info == FTS_D && p->fts_level == 1
&& (strcmp(p->fts_name, "cache") == 0
|| strcmp(p->fts_name, "code_cache") == 0)) {
// Mark cache dirs
p->fts_number = 1;
} else {
// Inherit parent's number
p->fts_number = p->fts_parent->fts_number;
}
switch (p->fts_info) {
case FTS_D:
case FTS_F:
case FTS_SL:
case FTS_SLNONE:
if (p->fts_statp->st_uid == previousUid) {
if (lchown(p->fts_path, uid, p->fts_number ? cacheGid : uid) != 0) {
PLOG(WARNING) << "Failed to lchown " << p->fts_path;
}
} else {
LOG(WARNING) << "Ignoring " << p->fts_path << " with unexpected UID "
<< p->fts_statp->st_uid << " instead of " << previousUid;
}
break;
}
}
fts_close(fts);
return true;
}
static void chown_app_profile_dir(const std::string &packageName, int32_t appId, int32_t userId) {
uid_t uid = multiuser_get_uid(userId, appId);
gid_t sharedGid = multiuser_get_shared_gid(userId, appId);
const std::string profile_dir =
create_primary_current_profile_package_dir_path(userId, packageName);
char *argv[] = { (char*) profile_dir.c_str(), nullptr };
if (FTS* fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr)) {
for (FTSENT* p; (p = fts_read(fts)) != nullptr;) {
switch (p->fts_info) {
case FTS_D:
case FTS_F:
case FTS_SL:
case FTS_SLNONE:
if (lchown(p->fts_path, uid, uid) != 0) {
PLOG(WARNING) << "Failed to lchown " << p->fts_path;
}
break;
}
}
fts_close(fts);
}
const std::string ref_profile_path =
create_primary_reference_profile_package_dir_path(packageName);
argv[0] = (char *) ref_profile_path.c_str();
if (FTS* fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr)) {
for (FTSENT* p; (p = fts_read(fts)) != nullptr;) {
if (p->fts_info == FTS_D && p->fts_level == 0) {
if (chown(p->fts_path, AID_SYSTEM, sharedGid) != 0) {
PLOG(WARNING) << "Failed to chown " << p->fts_path;
}
continue;
}
switch (p->fts_info) {
case FTS_D:
case FTS_F:
case FTS_SL:
case FTS_SLNONE:
if (lchown(p->fts_path, sharedGid, sharedGid) != 0) {
PLOG(WARNING) << "Failed to lchown " << p->fts_path;
}
break;
}
}
fts_close(fts);
}
}
static binder::Status createAppDataDirs(const std::string& path, int32_t uid, int32_t gid,
int32_t previousUid, int32_t cacheGid,
const std::string& seInfo, mode_t targetMode,
long projectIdApp, long projectIdCache) {
ScopedTrace tracer("create-dirs");
struct stat st{};
bool parent_dir_exists = (stat(path.c_str(), &st) == 0);
auto cache_path = StringPrintf("%s/%s", path.c_str(), "cache");
auto code_cache_path = StringPrintf("%s/%s", path.c_str(), "code_cache");
bool cache_exists = (access(cache_path.c_str(), F_OK) == 0);
bool code_cache_exists = (access(code_cache_path.c_str(), F_OK) == 0);
if (parent_dir_exists) {
if (previousUid > 0 && previousUid != uid) {
if (!chown_app_dir(path, uid, previousUid, cacheGid)) {
return error("Failed to chown " + path);
}
}
}
// Prepare only the parent app directory
if (prepare_app_dir(path, targetMode, uid, gid, projectIdApp) ||
prepare_app_cache_dir(path, "cache", 02771, uid, cacheGid, projectIdCache) ||
prepare_app_cache_dir(path, "code_cache", 02771, uid, cacheGid, projectIdCache)) {
return error("Failed to prepare " + path);
}
// Consider restorecon over contents if label changed
if (restorecon_app_data_lazy(path, seInfo, uid, parent_dir_exists)) {
return error("Failed to restorecon " + path);
}
// If the parent dir exists, the restorecon would already have been done
// as a part of the recursive restorecon above
if (parent_dir_exists && !cache_exists
&& restorecon_app_data_lazy(cache_path, seInfo, uid, false)) {
return error("Failed to restorecon " + cache_path);
}
// If the parent dir exists, the restorecon would already have been done
// as a part of the recursive restorecon above
if (parent_dir_exists && !code_cache_exists
&& restorecon_app_data_lazy(code_cache_path, seInfo, uid, false)) {
return error("Failed to restorecon " + code_cache_path);
}
return ok();
}
binder::Status InstalldNativeService::createAppDataLocked(
const std::optional<std::string>& uuid, const std::string& packageName, int32_t userId,
int32_t flags, int32_t appId, int32_t previousAppId, const std::string& seInfo,
int32_t targetSdkVersion, int64_t* ceDataInode, int64_t* deDataInode) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
const char* pkgname = packageName.c_str();
// Assume invalid inode unless filled in below
if (ceDataInode != nullptr) *ceDataInode = -1;
if (deDataInode != nullptr) *deDataInode = -1;
int32_t uid = multiuser_get_uid(userId, appId);
// If previousAppId > 0, an app is changing its app ID
int32_t previousUid =
previousAppId > 0 ? (int32_t)multiuser_get_uid(userId, previousAppId) : -1;
int32_t cacheGid = multiuser_get_cache_gid(userId, appId);
mode_t targetMode = targetSdkVersion >= MIN_RESTRICTED_HOME_SDK_VERSION ? 0700 : 0751;
// If UID doesn't have a specific cache GID, use UID value
if (cacheGid == -1) {
cacheGid = uid;
}
long projectIdApp = get_project_id(uid, PROJECT_ID_APP_START);
long projectIdCache = get_project_id(uid, PROJECT_ID_APP_CACHE_START);
if (flags & FLAG_STORAGE_CE) {
ScopedTrace tracer("ce");
auto path = create_data_user_ce_package_path(uuid_, userId, pkgname);
auto status = createAppDataDirs(path, uid, uid, previousUid, cacheGid, seInfo, targetMode,
projectIdApp, projectIdCache);
if (!status.isOk()) {
return status;
}
// 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 error("Failed to write_path_inode for " + path);
}
// And return the CE inode of the top-level data directory so we can
// clear contents while CE storage is locked
if (ceDataInode != nullptr) {
ino_t result;
if (get_path_inode(path, &result) != 0) {
return error("Failed to get_path_inode for " + path);
}
*ceDataInode = static_cast<uint64_t>(result);
}
}
if (flags & FLAG_STORAGE_DE) {
ScopedTrace tracer("de");
auto path = create_data_user_de_package_path(uuid_, userId, pkgname);
auto status = createAppDataDirs(path, uid, uid, previousUid, cacheGid, seInfo, targetMode,
projectIdApp, projectIdCache);
if (!status.isOk()) {
return status;
}
if (previousUid > 0 && previousUid != uid) {
chown_app_profile_dir(packageName, appId, userId);
}
if (!prepare_app_profile_dir(packageName, appId, userId)) {
return error("Failed to prepare profiles for " + packageName);
}
if (deDataInode != nullptr) {
ino_t result;
if (get_path_inode(path, &result) != 0) {
return error("Failed to get_path_inode for " + path);
}
*deDataInode = static_cast<uint64_t>(result);
}
}
if (flags & FLAG_STORAGE_SDK) {
ScopedTrace tracer("sdk");
// Safe to ignore status since we can retry creating this by calling reconcileSdkData
auto ignore = createSdkSandboxDataPackageDirectory(uuid, packageName, userId, appId, flags);
if (!ignore.isOk()) {
PLOG(WARNING) << "Failed to create sdk data package directory for " << packageName;
}
} else {
ScopedTrace tracer("destroy-sdk");
// Package does not need sdk storage. Remove it.
destroySdkSandboxDataPackageDirectory(uuid, packageName, userId, flags);
}
return ok();
}
/**
* Responsible for creating /data/misc_{ce|de}/user/0/sdksandbox/<package-name> directory and other
* app level sub directories, such as ./shared
*/
binder::Status InstalldNativeService::createSdkSandboxDataPackageDirectory(
const std::optional<std::string>& uuid, const std::string& packageName, int32_t userId,
int32_t appId, int32_t flags) {
ENFORCE_VALID_USER(userId);
int32_t sdkSandboxUid = multiuser_get_sdk_sandbox_uid(userId, appId);
if (sdkSandboxUid == -1) {
// There no valid sdk sandbox process for this app. Skip creation of data directory
return ok();
}
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
constexpr int storageFlags[2] = {FLAG_STORAGE_CE, FLAG_STORAGE_DE};
for (int currentFlag : storageFlags) {
if ((flags & currentFlag) == 0) {
continue;
}
bool isCeData = (currentFlag == FLAG_STORAGE_CE);
// /data/misc_{ce,de}/<user-id>/sdksandbox directory gets created by vold
// during user creation
// Prepare the package directory
auto packagePath = create_data_misc_sdk_sandbox_package_path(uuid_, isCeData, userId,
packageName.c_str());
#if SDK_DEBUG
LOG(DEBUG) << "Creating app-level sdk data directory: " << packagePath;
#endif
if (prepare_app_dir(packagePath, 0751, AID_SYSTEM, AID_SYSTEM, 0)) {
return error("Failed to prepare " + packagePath);
}
}
return ok();
}
binder::Status InstalldNativeService::createAppData(
const std::optional<std::string>& uuid, const std::string& packageName, int32_t userId,
int32_t flags, int32_t appId, int32_t previousAppId, const std::string& seInfo,
int32_t targetSdkVersion, int64_t* ceDataInode, int64_t* deDataInode) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE_USER();
return createAppDataLocked(uuid, packageName, userId, flags, appId, previousAppId, seInfo,
targetSdkVersion, ceDataInode, deDataInode);
}
binder::Status InstalldNativeService::createAppData(
const android::os::CreateAppDataArgs& args,
android::os::CreateAppDataResult* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(args.userId);
// Locking is performed depeer in the callstack.
int64_t ceDataInode = -1;
int64_t deDataInode = -1;
auto status = createAppData(args.uuid, args.packageName, args.userId, args.flags, args.appId,
args.previousAppId, args.seInfo, args.targetSdkVersion,
&ceDataInode, &deDataInode);
_aidl_return->ceDataInode = ceDataInode;
_aidl_return->deDataInode = deDataInode;
_aidl_return->exceptionCode = status.exceptionCode();
_aidl_return->exceptionMessage = status.exceptionMessage();
return ok();
}
binder::Status InstalldNativeService::createAppDataBatched(
const std::vector<android::os::CreateAppDataArgs>& args,
std::vector<android::os::CreateAppDataResult>* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
for (const auto& arg : args) {
ENFORCE_VALID_USER(arg.userId);
}
// Locking is performed depeer in the callstack.
std::vector<android::os::CreateAppDataResult> results;
for (const auto &arg : args) {
android::os::CreateAppDataResult result;
createAppData(arg, &result);
results.push_back(result);
}
*_aidl_return = results;
return ok();
}
binder::Status InstalldNativeService::reconcileSdkData(
const android::os::ReconcileSdkDataArgs& args) {
ENFORCE_VALID_USER(args.userId);
// Locking is performed depeer in the callstack.
return reconcileSdkData(args.uuid, args.packageName, args.subDirNames, args.userId, args.appId,
args.previousAppId, args.seInfo, args.flags);
}
/**
* Reconciles per-sdk directory under app-level sdk data directory.
* E.g. `/data/misc_ce/0/sdksandbox/<package-name>/<sdkPackageName>-<randomSuffix>
*
* - If the sdk data package directory is missing, we create it first.
* - If sdkPackageNames is empty, we delete sdk package directory since it's not needed anymore.
* - If a sdk level directory we need to prepare already exist, we skip creating it again. This
* is to avoid having same per-sdk directory with different suffix.
* - If a sdk level directory exist which is absent from sdkPackageNames, we remove it.
*/
binder::Status InstalldNativeService::reconcileSdkData(const std::optional<std::string>& uuid,
const std::string& packageName,
const std::vector<std::string>& subDirNames,
int userId, int appId, int previousAppId,
const std::string& seInfo, int flags) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE_USER();
#if SDK_DEBUG
LOG(DEBUG) << "Creating per sdk data directory for: " << packageName;
#endif
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
// Prepare the sdk package directory in case it's missing
const auto status =
createSdkSandboxDataPackageDirectory(uuid, packageName, userId, appId, flags);
if (!status.isOk()) {
return status;
}
auto res = ok();
// We have to create sdk data for CE and DE storage
const int storageFlags[2] = {FLAG_STORAGE_CE, FLAG_STORAGE_DE};
for (int currentFlag : storageFlags) {
if ((flags & currentFlag) == 0) {
continue;
}
const bool isCeData = (currentFlag == FLAG_STORAGE_CE);
const auto packagePath = create_data_misc_sdk_sandbox_package_path(uuid_, isCeData, userId,
packageName.c_str());
// Remove existing sub-directories not referred in subDirNames
const std::unordered_set<std::string> expectedSubDirNames(subDirNames.begin(),
subDirNames.end());
const auto subDirHandler = [&packagePath, &expectedSubDirNames,
&res](const std::string& subDirName) {
// Remove the per-sdk directory if it is not referred in
// expectedSubDirNames
if (expectedSubDirNames.find(subDirName) == expectedSubDirNames.end()) {
auto path = packagePath + "/" + subDirName;
if (delete_dir_contents_and_dir(path) != 0) {
res = error("Failed to delete " + path);
return;
}
}
};
const int ec = foreach_subdir(packagePath, subDirHandler);
if (ec != 0) {
res = error("Failed to process subdirs for " + packagePath);
continue;
}
// Now create the subDirNames
for (const auto& subDirName : subDirNames) {
const std::string path =
create_data_misc_sdk_sandbox_sdk_path(uuid_, isCeData, userId,
packageName.c_str(), subDirName.c_str());
// Create the directory along with cache and code_cache
const int32_t cacheGid = multiuser_get_cache_gid(userId, appId);
if (cacheGid == -1) {
return exception(binder::Status::EX_ILLEGAL_STATE,
StringPrintf("cacheGid cannot be -1 for sdk data"));
}
const int32_t sandboxUid = multiuser_get_sdk_sandbox_uid(userId, appId);
int32_t previousSandboxUid = multiuser_get_sdk_sandbox_uid(userId, previousAppId);
int32_t appUid = multiuser_get_uid(userId, appId);
long projectIdApp = get_project_id(appUid, PROJECT_ID_APP_START);
long projectIdCache = get_project_id(appUid, PROJECT_ID_APP_CACHE_START);
auto status =
createAppDataDirs(path, sandboxUid, AID_NOBODY, previousSandboxUid, cacheGid,
seInfo, 0700 | S_ISGID, projectIdApp, projectIdCache);
if (!status.isOk()) {
res = status;
continue;
}
}
}
return res;
}
binder::Status InstalldNativeService::migrateAppData(const std::optional<std::string>& uuid,
const std::string& packageName, int32_t userId, int32_t flags) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE_USER();
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) {
return error("Failed to mark default storage " + ce_path);
}
}
// 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) {
return error("Failed to delete " + target);
}
if (rename(source.c_str(), target.c_str()) != 0) {
return error("Failed to rename " + source + " to " + target);
}
}
return ok();
}
binder::Status InstalldNativeService::clearAppProfiles(const std::string& packageName,
const std::string& profileName) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_FILE_NAME(profileName);
if (!base::EndsWith(profileName, ".prof")) {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
StringPrintf("Profile name %s does not end with .prof",
profileName.c_str()));
}
LOCK_PACKAGE();
binder::Status res = ok();
if (!clear_primary_reference_profile(packageName, profileName)) {
res = error("Failed to clear reference profile for " + packageName);
}
if (!clear_primary_current_profiles(packageName, profileName)) {
res = error("Failed to clear current profiles for " + packageName);
}
return res;
}
binder::Status InstalldNativeService::clearAppData(const std::optional<std::string>& uuid,
const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE_USER();
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
const char* pkgname = packageName.c_str();
binder::Status res = ok();
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) {
if (delete_dir_contents(path) != 0) {
res = error("Failed to delete contents of " + path);
} else if ((flags & (FLAG_CLEAR_CACHE_ONLY | FLAG_CLEAR_CODE_CACHE_ONLY)) == 0) {
remove_path_xattr(path, kXattrInodeCache);
remove_path_xattr(path, kXattrInodeCodeCache);
}
}
}
if (flags & FLAG_STORAGE_DE) {
std::string suffix;
if (flags & FLAG_CLEAR_CACHE_ONLY) {
suffix = CACHE_DIR_POSTFIX;
} else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) {
suffix = CODE_CACHE_DIR_POSTFIX;
}
auto path = create_data_user_de_package_path(uuid_, userId, pkgname) + suffix;
if (access(path.c_str(), F_OK) == 0) {
if (delete_dir_contents(path) != 0) {
res = error("Failed to delete contents of " + path);
}
}
}
if (flags & FLAG_STORAGE_EXTERNAL) {
std::lock_guard<std::recursive_mutex> lock(mMountsLock);
for (const auto& n : mStorageMounts) {
auto extPath = n.second;
if (android::base::GetBoolProperty(kFuseProp, false)) {
std::regex re("^\\/mnt\\/pass_through\\/[0-9]+\\/emulated");
if (std::regex_match(extPath, re)) {
extPath += "/" + std::to_string(userId);
}
} else {
if (n.first.compare(0, 14, "/mnt/media_rw/") != 0) {
extPath += StringPrintf("/%d", userId);
} else if (userId != 0) {
// TODO: support devices mounted under secondary users
continue;
}
}
if (flags & FLAG_CLEAR_CACHE_ONLY) {
// Clear only cached data from shared storage
auto path = StringPrintf("%s/Android/data/%s/cache", extPath.c_str(), pkgname);
if (delete_dir_contents(path, true) != 0) {
res = error("Failed to delete contents of " + path);
}
} else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) {
// No code cache on shared storage
} else {
// Clear everything on shared storage
auto path = StringPrintf("%s/Android/data/%s", extPath.c_str(), pkgname);
if (delete_dir_contents(path, true) != 0) {
res = error("Failed to delete contents of " + path);
}
path = StringPrintf("%s/Android/media/%s", extPath.c_str(), pkgname);
if (delete_dir_contents(path, true) != 0) {
res = error("Failed to delete contents of " + path);
}
// Note that we explicitly don't delete OBBs - those are only removed on
// app uninstall.
}
}
}
auto status = clearSdkSandboxDataPackageDirectory(uuid, packageName, userId, flags);
if (!status.isOk()) {
res = status;
}
return res;
}
binder::Status InstalldNativeService::clearSdkSandboxDataPackageDirectory(
const std::optional<std::string>& uuid, const std::string& packageName, int32_t userId,
int32_t flags) {
ENFORCE_VALID_USER(userId);
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
const char* pkgname = packageName.c_str();
binder::Status res = ok();
constexpr int storageFlags[2] = {FLAG_STORAGE_CE, FLAG_STORAGE_DE};
for (int i = 0; i < 2; i++) {
int currentFlag = storageFlags[i];
if ((flags & currentFlag) == 0) {
continue;
}
bool isCeData = (currentFlag == FLAG_STORAGE_CE);
std::string suffix;
if (flags & FLAG_CLEAR_CACHE_ONLY) {
suffix = CACHE_DIR_POSTFIX;
} else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) {
suffix = CODE_CACHE_DIR_POSTFIX;
}
auto appPath = create_data_misc_sdk_sandbox_package_path(uuid_, isCeData, userId, pkgname);
if (access(appPath.c_str(), F_OK) != 0) continue;
const auto subDirHandler = [&appPath, &res, &suffix](const std::string& filename) {
auto filepath = appPath + "/" + filename + suffix;
if (delete_dir_contents(filepath, true) != 0) {
res = error("Failed to clear contents of " + filepath);
}
};
const int ec = foreach_subdir(appPath, subDirHandler);
if (ec != 0) {
res = error("Failed to process subdirs for " + appPath);
}
}
return res;
}
static int destroy_app_reference_profile(const std::string& pkgname) {
return delete_dir_contents_and_dir(
create_primary_reference_profile_package_dir_path(pkgname),
/*ignore_if_missing*/ true);
}
static int destroy_app_current_profiles(const std::string& pkgname, userid_t userid) {
return delete_dir_contents_and_dir(
create_primary_current_profile_package_dir_path(userid, pkgname),
/*ignore_if_missing*/ true);
}
binder::Status InstalldNativeService::destroyAppProfiles(const std::string& packageName) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE();
binder::Status res = ok();
std::vector<userid_t> users = get_known_users(/*volume_uuid*/ nullptr);
for (auto user : users) {
if (destroy_app_current_profiles(packageName, user) != 0) {
res = error("Failed to destroy current profiles for " + packageName);
}
}
if (destroy_app_reference_profile(packageName) != 0) {
res = error("Failed to destroy reference profile for " + packageName);
}
return res;
}
binder::Status InstalldNativeService::deleteReferenceProfile(const std::string& packageName,
const std::string& profileName) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE();
// This function only supports primary dex'es.
std::string path =
create_reference_profile_path(packageName, profileName, /*is_secondary_dex=*/false);
if (unlink(path.c_str()) != 0) {
if (errno == ENOENT) {
return ok();
} else {
return error("Failed to delete profile " + profileName + " for " + packageName);
}
}
return ok();
}
binder::Status InstalldNativeService::destroyAppData(const std::optional<std::string>& uuid,
const std::string& packageName, int32_t userId, int32_t flags, int64_t ceDataInode) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE_USER();
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
const char* pkgname = packageName.c_str();
binder::Status res = ok();
if (flags & FLAG_STORAGE_CE) {
auto path = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInode);
if (rename_delete_dir_contents_and_dir(path) != 0) {
res = error("Failed to delete " + path);
}
}
if (flags & FLAG_STORAGE_DE) {
auto path = create_data_user_de_package_path(uuid_, userId, pkgname);
if (rename_delete_dir_contents_and_dir(path) != 0) {
res = error("Failed to delete " + path);
}
if ((flags & FLAG_CLEAR_APP_DATA_KEEP_ART_PROFILES) == 0) {
destroy_app_current_profiles(packageName, 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(packageName);
}
}
if (flags & FLAG_STORAGE_EXTERNAL) {
std::lock_guard<std::recursive_mutex> lock(mMountsLock);
for (const auto& n : mStorageMounts) {
auto extPath = n.second;
if (android::base::GetBoolProperty(kFuseProp, false)) {
std::regex re("^\\/mnt\\/pass_through\\/[0-9]+\\/emulated");
if (std::regex_match(extPath, re)) {
extPath += "/" + std::to_string(userId);
}
} else {
if (n.first.compare(0, 14, "/mnt/media_rw/") != 0) {
extPath += StringPrintf("/%d", userId);
} else if (userId != 0) {
// TODO: support devices mounted under secondary users
continue;
}
}
auto path = StringPrintf("%s/Android/data/%s", extPath.c_str(), pkgname);
if (delete_dir_contents_and_dir(path, true) != 0) {
res = error("Failed to delete contents of " + path);
}
path = StringPrintf("%s/Android/media/%s", extPath.c_str(), pkgname);
if (delete_dir_contents_and_dir(path, true) != 0) {
res = error("Failed to delete contents of " + path);
}
path = StringPrintf("%s/Android/obb/%s", extPath.c_str(), pkgname);
if (delete_dir_contents_and_dir(path, true) != 0) {
res = error("Failed to delete contents of " + path);
}
}
}
auto status = destroySdkSandboxDataPackageDirectory(uuid, packageName, userId, flags);
if (!status.isOk()) {
res = status;
}
return res;
}
binder::Status InstalldNativeService::destroySdkSandboxDataPackageDirectory(
const std::optional<std::string>& uuid, const std::string& packageName, int32_t userId,
int32_t flags) {
ENFORCE_VALID_USER(userId);
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
const char* pkgname = packageName.c_str();
binder::Status res = ok();
constexpr int storageFlags[2] = {FLAG_STORAGE_CE, FLAG_STORAGE_DE};
for (int i = 0; i < 2; i++) {
int currentFlag = storageFlags[i];
if ((flags & currentFlag) == 0) {
continue;
}
bool isCeData = (currentFlag == FLAG_STORAGE_CE);
auto appPath = create_data_misc_sdk_sandbox_package_path(uuid_, isCeData, userId, pkgname);
if (rename_delete_dir_contents_and_dir(appPath) != 0) {
res = error("Failed to delete " + appPath);
}
}
return res;
}
static gid_t get_cache_gid(uid_t uid) {
int32_t gid = multiuser_get_cache_gid(multiuser_get_user_id(uid), multiuser_get_app_id(uid));
return (gid != -1) ? gid : uid;
}
binder::Status InstalldNativeService::fixupAppData(const std::optional<std::string>& uuid,
int32_t flags) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_UUID(uuid);
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
for (auto userId : get_known_users(uuid_)) {
LOCK_USER();
atrace_pm_begin("fixup user");
FTS* fts;
FTSENT* p;
auto ce_path = create_data_user_ce_path(uuid_, userId);
auto de_path = create_data_user_de_path(uuid_, userId);
char *argv[] = { (char*) ce_path.c_str(), (char*) de_path.c_str(), nullptr };
if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr))) {
return error("Failed to fts_open");
}
while ((p = fts_read(fts)) != nullptr) {
if (p->fts_info == FTS_D && p->fts_level == 1) {
// Track down inodes of cache directories
uint64_t raw = 0;
ino_t inode_cache = 0;
ino_t inode_code_cache = 0;
if (getxattr(p->fts_path, kXattrInodeCache, &raw, sizeof(raw)) == sizeof(raw)) {
inode_cache = raw;
}
if (getxattr(p->fts_path, kXattrInodeCodeCache, &raw, sizeof(raw)) == sizeof(raw)) {
inode_code_cache = raw;
}
// Figure out expected GID of each child
FTSENT* child = fts_children(fts, 0);
while (child != nullptr) {
if ((child->fts_statp->st_ino == inode_cache)
|| (child->fts_statp->st_ino == inode_code_cache)
|| !strcmp(child->fts_name, "cache")
|| !strcmp(child->fts_name, "code_cache")) {
child->fts_number = get_cache_gid(p->fts_statp->st_uid);
} else {
child->fts_number = p->fts_statp->st_uid;
}
child = child->fts_link;
}
} else if (p->fts_level >= 2) {
if (p->fts_level > 2) {
// Inherit GID from parent once we're deeper into tree
p->fts_number = p->fts_parent->fts_number;
}
uid_t uid = p->fts_parent->fts_statp->st_uid;
gid_t cache_gid = get_cache_gid(uid);
gid_t expected = p->fts_number;
gid_t actual = p->fts_statp->st_gid;
if (actual == expected) {
#if FIXUP_DEBUG
LOG(DEBUG) << "Ignoring " << p->fts_path << " with expected GID " << expected;
#endif
if (!(flags & FLAG_FORCE)) {
fts_set(fts, p, FTS_SKIP);
}
} else if ((actual == uid) || (actual == cache_gid)) {
// Only consider fixing up when current GID belongs to app
if (p->fts_info != FTS_D) {
LOG(INFO) << "Fixing " << p->fts_path << " with unexpected GID " << actual
<< " instead of " << expected;
}
switch (p->fts_info) {
case FTS_DP:
// If we're moving towards cache GID, we need to set S_ISGID
if (expected == cache_gid) {
if (chmod(p->fts_path, 02771) != 0) {
PLOG(WARNING) << "Failed to chmod " << p->fts_path;
}
}
[[fallthrough]]; // also set GID
case FTS_F:
if (chown(p->fts_path, -1, expected) != 0) {
PLOG(WARNING) << "Failed to chown " << p->fts_path;
}
break;
case FTS_SL:
case FTS_SLNONE:
if (lchown(p->fts_path, -1, expected) != 0) {
PLOG(WARNING) << "Failed to chown " << p->fts_path;
}
break;
}
} else {
// Ignore all other GID transitions, since they're kinda shady
LOG(WARNING) << "Ignoring " << p->fts_path << " with unexpected GID " << actual
<< " instead of " << expected;
if (!(flags & FLAG_FORCE)) {
fts_set(fts, p, FTS_SKIP);
}
}
}
}
fts_close(fts);
atrace_pm_end();
}
return ok();
}
static int32_t copy_directory_recursive(const char* from, const char* to) {
char* argv[] =
{(char*)kCpPath,
(char*)"-F", /* delete any existing destination file first (--remove-destination) */
(char*)"--preserve=mode,ownership,timestamps,xattr", /* preserve properties */
(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,
(char*)to};
LOG(DEBUG) << "Copying " << from << " to " << to;
return logwrap_fork_execvp(ARRAY_SIZE(argv), argv, nullptr, false, LOG_ALOG, false, nullptr);
}
binder::Status InstalldNativeService::snapshotAppData(const std::optional<std::string>& volumeUuid,
const std::string& packageName,
int32_t userId, int32_t snapshotId,
int32_t storageFlags, int64_t* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID_IS_TEST_OR_NULL(volumeUuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE_USER();
const char* volume_uuid = volumeUuid ? volumeUuid->c_str() : nullptr;
const char* package_name = packageName.c_str();
binder::Status res = ok();
// Default result to 0, it will be populated with inode of ce data snapshot
// if FLAG_STORAGE_CE has been passed.
if (_aidl_return != nullptr) *_aidl_return = 0;
bool clear_ce_on_exit = false;
bool clear_de_on_exit = false;
auto deleter = [&clear_ce_on_exit, &clear_de_on_exit, &volume_uuid, &userId, &package_name,
&snapshotId] {
if (clear_de_on_exit) {
auto to = create_data_misc_de_rollback_package_path(volume_uuid, userId, snapshotId,
package_name);
if (delete_dir_contents(to.c_str(), 1, nullptr) != 0) {
LOG(WARNING) << "Failed to delete app data snapshot: " << to;
}
}
if (clear_ce_on_exit) {
auto to = create_data_misc_ce_rollback_package_path(volume_uuid, userId, snapshotId,
package_name);
if (delete_dir_contents(to.c_str(), 1, nullptr) != 0) {
LOG(WARNING) << "Failed to delete app data snapshot: " << to;
}
}
};
auto scope_guard = android::base::make_scope_guard(deleter);
if (storageFlags & FLAG_STORAGE_DE) {
auto from = create_data_user_de_package_path(volume_uuid, userId, package_name);
auto to = create_data_misc_de_rollback_path(volume_uuid, userId, snapshotId);
auto rollback_package_path =
create_data_misc_de_rollback_package_path(volume_uuid, userId, snapshotId,
package_name);
int rc = create_dir_if_needed(to.c_str(), kRollbackFolderMode);
if (rc != 0) {
return error(rc, "Failed to create folder " + to);
}
rc = delete_dir_contents(rollback_package_path, true /* ignore_if_missing */);
if (rc != 0) {
return error(rc, "Failed clearing existing snapshot " + rollback_package_path);
}
// Check if we have data to copy.
if (access(from.c_str(), F_OK) == 0) {
rc = copy_directory_recursive(from.c_str(), to.c_str());
}
if (rc != 0) {
res = error(rc, "Failed copying " + from + " to " + to);
clear_de_on_exit = true;
return res;
}
}
// The app may not have any data at all, in which case it's OK to skip here.
auto from_ce = create_data_user_ce_package_path(volume_uuid, userId, package_name);
if (access(from_ce.c_str(), F_OK) != 0) {
LOG(INFO) << "Missing source " << from_ce;
return ok();
}
// ce_data_inode is not needed when FLAG_CLEAR_CACHE_ONLY is set.
binder::Status clear_cache_result =
clearAppData(volumeUuid, packageName, userId, storageFlags | FLAG_CLEAR_CACHE_ONLY, 0);
if (!clear_cache_result.isOk()) {
// It should be fine to continue snapshot if we for some reason failed
// to clear cache.
LOG(WARNING) << "Failed to clear cache of app " << packageName;
}
// ce_data_inode is not needed when FLAG_CLEAR_CODE_CACHE_ONLY is set.
binder::Status clear_code_cache_result =
clearAppData(volumeUuid, packageName, userId, storageFlags | FLAG_CLEAR_CODE_CACHE_ONLY,
0);
if (!clear_code_cache_result.isOk()) {
// It should be fine to continue snapshot if we for some reason failed
// to clear code_cache.
LOG(WARNING) << "Failed to clear code_cache of app " << packageName;
}
if (storageFlags & FLAG_STORAGE_CE) {
auto from = create_data_user_ce_package_path(volume_uuid, userId, package_name);
auto to = create_data_misc_ce_rollback_path(volume_uuid, userId, snapshotId);
auto rollback_package_path =
create_data_misc_ce_rollback_package_path(volume_uuid, userId, snapshotId,
package_name);
int rc = create_dir_if_needed(to.c_str(), kRollbackFolderMode);
if (rc != 0) {
return error(rc, "Failed to create folder " + to);
}
rc = delete_dir_contents(rollback_package_path, true /* ignore_if_missing */);
if (rc != 0) {
return error(rc, "Failed clearing existing snapshot " + rollback_package_path);
}
rc = copy_directory_recursive(from.c_str(), to.c_str());
if (rc != 0) {
res = error(rc, "Failed copying " + from + " to " + to);
clear_ce_on_exit = true;
return res;
}
if (_aidl_return != nullptr) {
auto ce_snapshot_path =
create_data_misc_ce_rollback_package_path(volume_uuid, userId, snapshotId,
package_name);
rc = get_path_inode(ce_snapshot_path, reinterpret_cast<ino_t*>(_aidl_return));
if (rc != 0) {
res = error(rc, "Failed to get_path_inode for " + ce_snapshot_path);
clear_ce_on_exit = true;
return res;
}
}
}
return res;
}
binder::Status InstalldNativeService::restoreAppDataSnapshot(
const std::optional<std::string>& volumeUuid, const std::string& packageName,
const int32_t appId, const std::string& seInfo, const int32_t userId,
const int32_t snapshotId, int32_t storageFlags) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID_IS_TEST_OR_NULL(volumeUuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE_USER();
const char* volume_uuid = volumeUuid ? volumeUuid->c_str() : nullptr;
const char* package_name = packageName.c_str();
auto from_ce = create_data_misc_ce_rollback_package_path(volume_uuid, userId, snapshotId,
package_name);
auto from_de = create_data_misc_de_rollback_package_path(volume_uuid, userId, snapshotId,
package_name);
const bool needs_ce_rollback = (storageFlags & FLAG_STORAGE_CE) &&
(access(from_ce.c_str(), F_OK) == 0);
const bool needs_de_rollback = (storageFlags & FLAG_STORAGE_DE) &&
(access(from_de.c_str(), F_OK) == 0);
if (!needs_ce_rollback && !needs_de_rollback) {
return ok();
}
// We know we're going to rollback one of the CE or DE data, so we clear
// application data first. Note that it's possible that we're asked to
// restore both CE & DE data but that one of the restores fail. Leaving the
// app with no data in those cases is arguably better than leaving the app
// with mismatched / stale data.
LOG(INFO) << "Clearing app data for " << packageName << " to restore snapshot.";
// It's fine to pass 0 as ceDataInode here, because restoreAppDataSnapshot
// can only be called when user unlocks the phone, meaning that CE user data
// is decrypted.
binder::Status res =
clearAppData(volumeUuid, packageName, userId, storageFlags, 0 /* ceDataInode */);
if (!res.isOk()) {
return res;
}
if (needs_ce_rollback) {
auto to_ce = create_data_user_ce_path(volume_uuid, userId);
int rc = copy_directory_recursive(from_ce.c_str(), to_ce.c_str());
if (rc != 0) {
res = error(rc, "Failed copying " + from_ce + " to " + to_ce);
return res;
}
delete_dir_contents_and_dir(from_ce, true /* ignore_if_missing */);
}
if (needs_de_rollback) {
auto to_de = create_data_user_de_path(volume_uuid, userId);
int rc = copy_directory_recursive(from_de.c_str(), to_de.c_str());
if (rc != 0) {
if (needs_ce_rollback) {
auto ce_data = create_data_user_ce_package_path(volume_uuid, userId, package_name);
LOG(WARNING) << "de_data rollback failed. Erasing rolled back ce_data " << ce_data;
if (delete_dir_contents(ce_data.c_str(), 1, nullptr) != 0) {
LOG(WARNING) << "Failed to delete rolled back ce_data " << ce_data;
}
}
res = error(rc, "Failed copying " + from_de + " to " + to_de);
return res;
}
delete_dir_contents_and_dir(from_de, true /* ignore_if_missing */);
}
// Finally, restore the SELinux label on the app data.
return restoreconAppData(volumeUuid, packageName, userId, storageFlags, appId, seInfo);
}
binder::Status InstalldNativeService::destroyAppDataSnapshot(
const std::optional<std::string>& volumeUuid, const std::string& packageName,
const int32_t userId, const int64_t ceSnapshotInode, const int32_t snapshotId,
int32_t storageFlags) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID_IS_TEST_OR_NULL(volumeUuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE_USER();
const char* volume_uuid = volumeUuid ? volumeUuid->c_str() : nullptr;
const char* package_name = packageName.c_str();
if (storageFlags & FLAG_STORAGE_DE) {
auto de_snapshot_path = create_data_misc_de_rollback_package_path(volume_uuid, userId,
snapshotId, package_name);
int res = delete_dir_contents_and_dir(de_snapshot_path, true /* ignore_if_missing */);
if (res != 0) {
return error(res, "Failed clearing snapshot " + de_snapshot_path);
}
}
if (storageFlags & FLAG_STORAGE_CE) {
auto ce_snapshot_path =
create_data_misc_ce_rollback_package_path(volume_uuid, userId, snapshotId,
package_name, ceSnapshotInode);
int res = delete_dir_contents_and_dir(ce_snapshot_path, true /* ignore_if_missing */);
if (res != 0) {
return error(res, "Failed clearing snapshot " + ce_snapshot_path);
}
}
return ok();
}
binder::Status InstalldNativeService::destroyCeSnapshotsNotSpecified(
const std::optional<std::string>& volumeUuid, const int32_t userId,
const std::vector<int32_t>& retainSnapshotIds) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID_IS_TEST_OR_NULL(volumeUuid);
LOCK_USER();
const char* volume_uuid = volumeUuid ? volumeUuid->c_str() : nullptr;
auto base_path = create_data_misc_ce_rollback_base_path(volume_uuid, userId);
std::unique_ptr<DIR, decltype(&closedir)> dir(opendir(base_path.c_str()), closedir);
if (!dir) {
return error(-1, "Failed to open rollback base dir " + base_path);
}
struct dirent* ent;
while ((ent = readdir(dir.get()))) {
if (ent->d_type != DT_DIR) {
continue;
}
uint snapshot_id;
bool parse_ok = ParseUint(ent->d_name, &snapshot_id);
if (parse_ok &&
std::find(retainSnapshotIds.begin(), retainSnapshotIds.end(),
snapshot_id) == retainSnapshotIds.end()) {
auto rollback_path =
create_data_misc_ce_rollback_path(volume_uuid, userId, snapshot_id);
int res = delete_dir_contents_and_dir(rollback_path, true /* ignore_if_missing */);
if (res != 0) {
return error(res, "Failed clearing snapshot " + rollback_path);
}
}
}
return ok();
}
binder::Status InstalldNativeService::moveCompleteApp(const std::optional<std::string>& fromUuid,
const std::optional<std::string>& toUuid, const std::string& packageName,
int32_t appId, const std::string& seInfo,
int32_t targetSdkVersion, const std::string& fromCodePath) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_UUID(fromUuid);
CHECK_ARGUMENT_UUID(toUuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE();
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();
binder::Status res = ok();
std::vector<userid_t> users = get_known_users(from_uuid);
auto to_app_package_path_parent = create_data_app_path(to_uuid);
auto to_app_package_path = StringPrintf("%s/%s", to_app_package_path_parent.c_str(),
android::base::Basename(fromCodePath).c_str());
// Copy app
{
int rc = copy_directory_recursive(fromCodePath.c_str(), to_app_package_path_parent.c_str());
if (rc != 0) {
res = error(rc, "Failed copying " + fromCodePath + " to " + to_app_package_path);
goto fail;
}
if (selinux_android_restorecon(to_app_package_path.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) {
res = error("Failed to restorecon " + to_app_package_path);
goto fail;
}
}
// Copy private data for all known users
for (auto userId : users) {
LOCK_USER();
// Data source may not exist for all users; that's okay
auto from_ce = create_data_user_ce_package_path(from_uuid, userId, package_name);
if (access(from_ce.c_str(), F_OK) != 0) {
LOG(INFO) << "Missing source " << from_ce;
continue;
}
if (!createAppDataLocked(toUuid, packageName, userId, FLAG_STORAGE_CE | FLAG_STORAGE_DE,
appId, /* previousAppId */ -1, seInfo, targetSdkVersion, nullptr,
nullptr)
.isOk()) {
res = error("Failed to create package target");
goto fail;
}
{
auto from = create_data_user_de_package_path(from_uuid, userId, package_name);
auto to = create_data_user_de_path(to_uuid, userId);
int rc = copy_directory_recursive(from.c_str(), to.c_str());
if (rc != 0) {
res = error(rc, "Failed copying " + from + " to " + to);
goto fail;
}
}
{
auto from = create_data_user_ce_package_path(from_uuid, userId, package_name);
auto to = create_data_user_ce_path(to_uuid, userId);
int rc = copy_directory_recursive(from.c_str(), to.c_str());
if (rc != 0) {
res = error(rc, "Failed copying " + from + " to " + to);
goto fail;
}
}
if (!restoreconAppDataLocked(toUuid, packageName, userId, FLAG_STORAGE_CE | FLAG_STORAGE_DE,
appId, seInfo)
.isOk()) {
res = error("Failed to restorecon");
goto fail;
}
}
// Copy sdk data for all known users
for (auto userId : users) {
LOCK_USER();
constexpr int storageFlags[2] = {FLAG_STORAGE_CE, FLAG_STORAGE_DE};
for (int currentFlag : storageFlags) {
const bool isCeData = currentFlag == FLAG_STORAGE_CE;
const auto from = create_data_misc_sdk_sandbox_package_path(from_uuid, isCeData, userId,
package_name);
if (access(from.c_str(), F_OK) != 0) {
LOG(INFO) << "Missing source " << from;
continue;
}
const auto to = create_data_misc_sdk_sandbox_path(to_uuid, isCeData, userId);
const int rc = copy_directory_recursive(from.c_str(), to.c_str());
if (rc != 0) {
res = error(rc, "Failed copying " + from + " to " + to);
goto fail;
}
}
if (!restoreconSdkDataLocked(toUuid, packageName, userId, FLAG_STORAGE_CE | FLAG_STORAGE_DE,
appId, seInfo)
.isOk()) {
res = 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 ok();
fail:
// Nuke everything we might have already copied
{
if (delete_dir_contents(to_app_package_path.c_str(), 1, nullptr) != 0) {
LOG(WARNING) << "Failed to rollback " << to_app_package_path;
}
}
for (auto userId : users) {
LOCK_USER();
{
auto to = create_data_user_de_package_path(to_uuid, userId, package_name);
if (delete_dir_contents(to.c_str(), 1, nullptr) != 0) {
LOG(WARNING) << "Failed to rollback " << to;
}
}
{
auto to = create_data_user_ce_package_path(to_uuid, userId, package_name);
if (delete_dir_contents(to.c_str(), 1, nullptr) != 0) {
LOG(WARNING) << "Failed to rollback " << to;
}
}
}
for (auto userId : users) {
LOCK_USER();
constexpr int storageFlags[2] = {FLAG_STORAGE_CE, FLAG_STORAGE_DE};
for (int currentFlag : storageFlags) {
const bool isCeData = currentFlag == FLAG_STORAGE_CE;
const auto to = create_data_misc_sdk_sandbox_package_path(to_uuid, isCeData, userId,
package_name);
if (delete_dir_contents(to.c_str(), 1, nullptr) != 0) {
LOG(WARNING) << "Failed to rollback " << to;
}
}
}
return res;
}
binder::Status InstalldNativeService::createUserData(const std::optional<std::string>& uuid,
int32_t userId, int32_t userSerial ATTRIBUTE_UNUSED, int32_t flags) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
LOCK_USER();
ScopedTrace tracer("create-user-data");
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
if (flags & FLAG_STORAGE_DE) {
if (uuid_ == nullptr) {
if (ensure_config_user_dirs(userId) != 0) {
return error(StringPrintf("Failed to ensure dirs for %d", userId));
}
}
}
return ok();
}
binder::Status InstalldNativeService::destroyUserData(const std::optional<std::string>& uuid,
int32_t userId, int32_t flags) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
LOCK_USER();
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
binder::Status res = ok();
if (flags & FLAG_STORAGE_DE) {
auto path = create_data_user_de_path(uuid_, userId);
// Contents only, as vold is responsible for the user_de dir itself.
if (delete_dir_contents(path, true) != 0) {
res = error("Failed to delete contents of " + path);
}
auto sdk_sandbox_de_path =
create_data_misc_sdk_sandbox_path(uuid_, /*isCeData=*/false, userId);
if (delete_dir_contents_and_dir(sdk_sandbox_de_path, true) != 0) {
res = error("Failed to delete " + sdk_sandbox_de_path);
}
if (uuid_ == nullptr) {
path = create_data_misc_legacy_path(userId);
if (delete_dir_contents_and_dir(path, true) != 0) {
res = error("Failed to delete " + path);
}
path = create_primary_cur_profile_dir_path(userId);
if (delete_dir_contents_and_dir(path, true) != 0) {
res = error("Failed to delete " + path);
}
}
}
if (flags & FLAG_STORAGE_CE) {
auto path = create_data_user_ce_path(uuid_, userId);
// Contents only, as vold is responsible for the user_ce dir itself.
if (delete_dir_contents(path, true) != 0) {
res = error("Failed to delete contents of " + path);
}
auto sdk_sandbox_ce_path =
create_data_misc_sdk_sandbox_path(uuid_, /*isCeData=*/true, userId);
if (delete_dir_contents_and_dir(sdk_sandbox_ce_path, true) != 0) {
res = error("Failed to delete " + sdk_sandbox_ce_path);
}
path = findDataMediaPath(uuid, userId);
// Contents only, as vold is responsible for the media dir itself.
if (delete_dir_contents(path, true) != 0) {
res = error("Failed to delete contents of " + path);
}
}
return res;
}
binder::Status InstalldNativeService::freeCache(const std::optional<std::string>& uuid,
int64_t targetFreeBytes, int32_t flags) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_UUID(uuid);
#ifndef GRANULAR_LOCKS
std::lock_guard lock(mLock);
#endif // !GRANULAR_LOCKS
auto uuidString = uuid.value_or("");
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
auto data_path = create_data_path(uuid_);
auto noop = (flags & FLAG_FREE_CACHE_NOOP);
auto defy_target = (flags & FLAG_FREE_CACHE_DEFY_TARGET_FREE_BYTES);
int64_t free = data_disk_free(data_path);
if (free < 0) {
return error("Failed to determine free space for " + data_path);
}
int64_t needed = targetFreeBytes - free;
if (!defy_target) {
LOG(DEBUG) << "Device " << data_path << " has " << free << " free; requested "
<< targetFreeBytes << "; needed " << needed;
if (free >= targetFreeBytes) {
return ok();
}
}
if (flags & FLAG_FREE_CACHE_V2) {
// This new cache strategy fairly removes files from UIDs by deleting
// files from the UIDs which are most over their allocated quota
// 1. Create trackers for every known UID
atrace_pm_begin("create");
const auto users = get_known_users(uuid_);
#ifdef GRANULAR_LOCKS
std::vector<UserLock> userLocks;
userLocks.reserve(users.size());
std::vector<UserWriteLockGuard> lockGuards;
lockGuards.reserve(users.size());
#endif // GRANULAR_LOCKS
std::unordered_map<uid_t, std::shared_ptr<CacheTracker>> trackers;
for (auto userId : users) {
#ifdef GRANULAR_LOCKS
userLocks.emplace_back(userId, mUserIdLock, mLock);
lockGuards.emplace_back(userLocks.back());
#endif // GRANULAR_LOCKS
FTS *fts;
FTSENT *p;
// Create a list of data paths whose children have cache directories
auto ce_path = create_data_user_ce_path(uuid_, userId);
auto de_path = create_data_user_de_path(uuid_, userId);
auto media_path = findDataMediaPath(uuid, userId) + "/Android/data/";
auto ce_sdk_path = create_data_misc_sdk_sandbox_path(uuid_, /*isCeData=*/true, userId);
auto de_sdk_path = create_data_misc_sdk_sandbox_path(uuid_, /*isCeData=*/false, userId);
std::vector<std::string> dataPaths = {ce_path, de_path, media_path};
foreach_subdir(ce_sdk_path, [&ce_sdk_path, &dataPaths](const std::string subDir) {
const auto fullpath = ce_sdk_path + "/" + subDir;
dataPaths.push_back(fullpath);
});
foreach_subdir(de_sdk_path, [&de_sdk_path, &dataPaths](const std::string subDir) {
const auto fullpath = de_sdk_path + "/" + subDir;
dataPaths.push_back((char*)fullpath.c_str());
});
char* argv[dataPaths.size() + 1];
for (unsigned int i = 0; i < dataPaths.size(); i++) {
argv[i] = (char*)dataPaths[i].c_str();
}
argv[dataPaths.size()] = nullptr;
if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr))) {
return error("Failed to fts_open");
}
while ((p = fts_read(fts)) != nullptr) {
if (p->fts_info == FTS_D && p->fts_level == 1) {
uid_t uid = p->fts_statp->st_uid;
// If uid belongs to sdk sandbox, then the cache should be attributed to the
// original client app.
const auto client_uid = multiuser_convert_sdk_sandbox_to_app_uid(uid);
const bool isSandboxUid = (client_uid != (uid_t)-1);
if (isSandboxUid) uid = client_uid;
if (multiuser_get_app_id(uid) == AID_MEDIA_RW) {
uid = (multiuser_get_app_id(p->fts_statp->st_gid) - AID_EXT_GID_START)
+ AID_APP_START;
}
auto search = trackers.find(uid);
if (search != trackers.end()) {
search->second->addDataPath(p->fts_path);
} else {
auto tracker = std::shared_ptr<CacheTracker>(new CacheTracker(
multiuser_get_user_id(uid), multiuser_get_app_id(uid), uuidString));
tracker->addDataPath(p->fts_path);
{
std::lock_guard<std::recursive_mutex> lock(mQuotasLock);
tracker->cacheQuota = mCacheQuotas[uid];
}
if (tracker->cacheQuota == 0) {
#if MEASURE_DEBUG
LOG(WARNING) << "UID " << uid << " has no cache quota; assuming 64MB";
#endif
tracker->cacheQuota = 67108864;
}
trackers[uid] = tracker;
}
fts_set(fts, p, FTS_SKIP);
}
}
fts_close(fts);
}
atrace_pm_end();
// 2. Populate tracker stats and insert into priority queue
atrace_pm_begin("populate");
auto cmp = [](std::shared_ptr<CacheTracker> left, std::shared_ptr<CacheTracker> right) {
return (left->getCacheRatio() < right->getCacheRatio());
};
std::priority_queue<std::shared_ptr<CacheTracker>,
std::vector<std::shared_ptr<CacheTracker>>, decltype(cmp)> queue(cmp);
for (const auto& it : trackers) {
it.second->loadStats();
queue.push(it.second);
}
atrace_pm_end();
// 3. Bounce across the queue, freeing items from whichever tracker is
// the most over their assigned quota
atrace_pm_begin("bounce");
std::shared_ptr<CacheTracker> active;
while (active || !queue.empty()) {
// Only look at apps under quota when explicitly requested
if (active && (active->getCacheRatio() < 10000)
&& !(flags & FLAG_FREE_CACHE_V2_DEFY_QUOTA)) {
LOG(DEBUG) << "Active ratio " << active->getCacheRatio()
<< " isn't over quota, and defy not requested";
break;
}
// Find the best tracker to work with; this might involve swapping
// if the active tracker is no longer the most over quota
bool nextBetter = active && !queue.empty()
&& active->getCacheRatio() < queue.top()->getCacheRatio();
if (!active || nextBetter) {
if (active) {
// Current tracker still has items, so we'll consider it
// again later once it bubbles up to surface
queue.push(active);
}
active = queue.top(); queue.pop();
active->ensureItems();
continue;
}
// If no items remain, go find another tracker
if (active->items.empty()) {
active = nullptr;
continue;
} else {
auto item = active->items.back();
active->items.pop_back();
LOG(DEBUG) << "Purging " << item->toString() << " from " << active->toString();
if (!noop) {
item->purge();
}
active->cacheUsed -= item->size;
needed -= item->size;
}
if (!defy_target) {
// Verify that we're actually done before bailing, since sneaky
// apps might be using hardlinks
if (needed <= 0) {
free = data_disk_free(data_path);
needed = targetFreeBytes - free;
if (needed <= 0) {
break;
} else {
LOG(WARNING) << "Expected to be done but still need " << needed;
}
}
}
}
atrace_pm_end();
} else {
return error("Legacy cache logic no longer supported");
}
if (!defy_target) {
free = data_disk_free(data_path);
if (free >= targetFreeBytes) {
return ok();
} else {
return error(StringPrintf("Failed to free up %" PRId64 " on %s; final free space %" PRId64,
targetFreeBytes, data_path.c_str(), free));
}
} else {
return ok();
}
}
binder::Status InstalldNativeService::rmdex(const std::string& codePath,
const std::string& instructionSet) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PATH(codePath);
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)) {
return error("Invalid path " + codePath);
}
if (!create_cache_path(dex_path, path, instruction_set)) {
return error("Failed to create cache path for " + codePath);
}
ALOGV("unlink %s\n", dex_path);
if (unlink(dex_path) < 0) {
// It's ok if we don't have a dalvik cache path. Report error only when the path exists
// but could not be unlinked.
if (errno != ENOENT) {
return error(StringPrintf("Failed to unlink %s", dex_path));
}
}
return ok();
}
struct stats {
int64_t codeSize;
int64_t dataSize;
int64_t cacheSize;
};
#if MEASURE_DEBUG
static std::string toString(std::vector<int64_t> values) {
std::stringstream res;
res << "[";
for (size_t i = 0; i < values.size(); i++) {
res << values[i];
if (i < values.size() - 1) {
res << ",";
}
}
res << "]";
return res.str();
}
#endif
// On devices without sdcardfs, if internal and external are on
// the same volume, a uid such as u0_a123 is used for both
// internal and external storage; therefore, subtract that
// amount from internal to make sure we don't count it double.
// This needs to happen for data, cache and OBB
static void deductDoubleSpaceIfNeeded(stats* stats, int64_t doubleSpaceToBeDeleted, uid_t uid,
const std::string& uuid) {
if (!supports_sdcardfs()) {
stats->dataSize -= doubleSpaceToBeDeleted;
long obbProjectId = get_project_id(uid, PROJECT_ID_EXT_OBB_START);
int64_t appObbSize = GetOccupiedSpaceForProjectId(uuid, obbProjectId);
stats->dataSize -= appObbSize;
}
}
static void collectQuotaStats(const std::string& uuid, int32_t userId,
int32_t appId, struct stats* stats, struct stats* extStats) {
int64_t space, doubleSpaceToBeDeleted = 0;
uid_t uid = multiuser_get_uid(userId, appId);
static const bool supportsProjectId = internal_storage_has_project_id();
if (extStats != nullptr) {
space = get_occupied_app_space_external(uuid, userId, appId);
if (space != -1) {
extStats->dataSize += space;
doubleSpaceToBeDeleted += space;
}
space = get_occupied_app_cache_space_external(uuid, userId, appId);
if (space != -1) {
extStats->dataSize += space; // cache counts for "data"
extStats->cacheSize += space;
doubleSpaceToBeDeleted += space;
}
}
if (stats != nullptr) {
if (!supportsProjectId) {
if ((space = GetOccupiedSpaceForUid(uuid, uid)) != -1) {
stats->dataSize += space;
}
deductDoubleSpaceIfNeeded(stats, doubleSpaceToBeDeleted, uid, uuid);
int sdkSandboxUid = multiuser_get_sdk_sandbox_uid(userId, appId);
if (sdkSandboxUid != -1) {
if ((space = GetOccupiedSpaceForUid(uuid, sdkSandboxUid)) != -1) {
stats->dataSize += space;
}
}
int cacheGid = multiuser_get_cache_gid(userId, appId);
if (cacheGid != -1) {
if ((space = GetOccupiedSpaceForGid(uuid, cacheGid)) != -1) {
stats->cacheSize += space;
}
}
} else {
long projectId = get_project_id(uid, PROJECT_ID_APP_START);
if ((space = GetOccupiedSpaceForProjectId(uuid, projectId)) != -1) {
stats->dataSize += space;
}
projectId = get_project_id(uid, PROJECT_ID_APP_CACHE_START);
if ((space = GetOccupiedSpaceForProjectId(uuid, projectId)) != -1) {
stats->cacheSize += space;
stats->dataSize += space;
}
}
int sharedGid = multiuser_get_shared_gid(0, appId);
if (sharedGid != -1) {
if ((space = GetOccupiedSpaceForGid(uuid, sharedGid)) != -1) {
stats->codeSize += space;
}
}
}
}
static void collectManualStats(const std::string& path, struct stats* stats) {
DIR *d;
int dfd;
struct dirent *de;
struct stat s;
d = opendir(path.c_str());
if (d == nullptr) {
if (errno != ENOENT) {
PLOG(WARNING) << "Failed to open " << path;
}
return;
}
dfd = dirfd(d);
while ((de = readdir(d))) {
const char *name = de->d_name;
int64_t size = 0;
if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
size = s.st_blocks * 512;
}
if (de->d_type == DT_DIR) {
if (!strcmp(name, ".")) {
// Don't recurse, but still count node size
} else if (!strcmp(name, "..")) {
// Don't recurse or count node size
continue;
} else {
// Measure all children nodes
size = 0;
calculate_tree_size(StringPrintf("%s/%s", path.c_str(), name), &size);
}
if (!strcmp(name, "cache") || !strcmp(name, "code_cache")) {
stats->cacheSize += size;
}
}
// Legacy symlink isn't owned by app
if (de->d_type == DT_LNK && !strcmp(name, "lib")) {
continue;
}
// Everything found inside is considered data
stats->dataSize += size;
}
closedir(d);
}
void collectManualStatsForSubDirectories(const std::string& path, struct stats* stats) {
const auto subDirHandler = [&path, &stats](const std::string& subDir) {
auto fullpath = path + "/" + subDir;
collectManualStats(fullpath, stats);
};
foreach_subdir(path, subDirHandler);
}
static void collectManualStatsForUser(const std::string& path, struct stats* stats,
bool exclude_apps = false,
bool is_sdk_sandbox_storage = false) {
DIR *d;
int dfd;
struct dirent *de;
struct stat s;
d = opendir(path.c_str());
if (d == nullptr) {
if (errno != ENOENT) {
PLOG(WARNING) << "Failed to open " << path;
}
return;
}
dfd = dirfd(d);
while ((de = readdir(d))) {
if (de->d_type == DT_DIR) {
const char *name = de->d_name;
if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) != 0) {
continue;
}
int32_t user_uid = multiuser_get_app_id(s.st_uid);
if (!strcmp(name, ".") || !strcmp(name, "..")) {
continue;
} else if (exclude_apps && (user_uid >= AID_APP_START && user_uid <= AID_APP_END)) {
continue;
} else if (is_sdk_sandbox_storage) {
// In case of sdk sandbox storage (e.g. /data/misc_ce/0/sdksandbox/<package-name>),
// collect individual stats of each subdirectory (shared, storage of each sdk etc.)
collectManualStatsForSubDirectories(StringPrintf("%s/%s", path.c_str(), name),
stats);
} else {
collectManualStats(StringPrintf("%s/%s", path.c_str(), name), stats);
}
}
}
closedir(d);
}
static void collectManualExternalStatsForUser(const std::string& path, struct stats* stats) {
FTS *fts;
FTSENT *p;
char *argv[] = { (char*) path.c_str(), nullptr };
if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr))) {
PLOG(ERROR) << "Failed to fts_open " << path;
return;
}
while ((p = fts_read(fts)) != nullptr) {
p->fts_number = p->fts_parent->fts_number;
switch (p->fts_info) {
case FTS_D:
if (p->fts_level == 3
&& !strcmp(p->fts_parent->fts_name, "obb")
&& !strcmp(p->fts_parent->fts_parent->fts_name, "Android")) {
p->fts_number = 1;
} else if (p->fts_level == 4
&& !strcmp(p->fts_name, "cache")
&& !strcmp(p->fts_parent->fts_parent->fts_name, "data")
&& !strcmp(p->fts_parent->fts_parent->fts_parent->fts_name, "Android")) {
p->fts_number = 2;
}
[[fallthrough]]; // to count the directory
case FTS_DEFAULT:
case FTS_F:
case FTS_SL:
case FTS_SLNONE:
int64_t size = (p->fts_statp->st_blocks * 512);
if (p->fts_number == 1) {
stats->codeSize += size;
} else {
if (p->fts_number == 2) {
stats->cacheSize += size;
}
stats->dataSize += size;
}
break;
}
}
fts_close(fts);
}
static bool ownsExternalStorage(int32_t appId) {
// if project id calculation is supported then, there is no need to
// calculate in a different way and project_id based calculation can work
if (internal_storage_has_project_id()) {
return false;
}
// Fetch external storage owner appid and check if it is the same as the
// current appId whose size is calculated
struct stat s;
auto _picDir = StringPrintf("%s/Pictures", create_data_media_path(nullptr, 0).c_str());
// check if the stat are present
if (stat(_picDir.c_str(), &s) == 0) {
// fetch the appId from the uid of the media app
return ((int32_t)multiuser_get_app_id(s.st_uid) == appId);
}
return false;
}
binder::Status InstalldNativeService::getAppSize(const std::optional<std::string>& uuid,
const std::vector<std::string>& packageNames, int32_t userId, int32_t flags,
int32_t appId, const std::vector<int64_t>& ceDataInodes,
const std::vector<std::string>& codePaths, std::vector<int64_t>* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_UUID(uuid);
if (packageNames.size() != ceDataInodes.size()) {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
"packageNames/ceDataInodes size mismatch.");
}
for (const auto& packageName : packageNames) {
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
}
for (const auto& codePath : codePaths) {
CHECK_ARGUMENT_PATH(codePath);
}
// NOTE: Locking is relaxed on this method, since it's limited to
// read-only measurements without mutation.
// When modifying this logic, always verify using tests:
// runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetAppSize
#if MEASURE_DEBUG
LOG(INFO) << "Measuring user " << userId << " app " << appId;
#endif
// Here's a summary of the common storage locations across the platform,
// and how they're each tagged:
//
// /data/app/com.example UID system
// /data/app/com.example/oat UID system
// /data/user/0/com.example UID u0_a10 GID u0_a10
// /data/user/0/com.example/cache UID u0_a10 GID u0_a10_cache
// /data/media/0/foo.txt UID u0_media_rw
// /data/media/0/bar.jpg UID u0_media_rw GID u0_media_image
// /data/media/0/Android/data/com.example UID u0_media_rw GID u0_a10_ext
// /data/media/0/Android/data/com.example/cache UID u0_media_rw GID u0_a10_ext_cache
// /data/media/obb/com.example UID system
struct stats stats;
struct stats extStats;
memset(&stats, 0, sizeof(stats));
memset(&extStats, 0, sizeof(extStats));
auto uuidString = uuid.value_or("");
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
if (!IsQuotaSupported(uuidString)) {
flags &= ~FLAG_USE_QUOTA;
}
atrace_pm_begin("obb");
for (const auto& packageName : packageNames) {
auto obbCodePath = create_data_media_package_path(uuid_, userId,
"obb", packageName.c_str());
calculate_tree_size(obbCodePath, &extStats.codeSize);
}
atrace_pm_end();
// Calculating the app size of the external storage owning app in a manual way, since
// calculating it through quota apis also includes external media storage in the app storage
// numbers
if (flags & FLAG_USE_QUOTA && appId >= AID_APP_START && !ownsExternalStorage(appId)) {
atrace_pm_begin("code");
for (const auto& codePath : codePaths) {
calculate_tree_size(codePath, &stats.codeSize, -1,
multiuser_get_shared_gid(0, appId));
}
atrace_pm_end();
atrace_pm_begin("quota");
collectQuotaStats(uuidString, userId, appId, &stats, &extStats);
atrace_pm_end();
} else {
atrace_pm_begin("code");
for (const auto& codePath : codePaths) {
calculate_tree_size(codePath, &stats.codeSize);
}
atrace_pm_end();
for (size_t i = 0; i < packageNames.size(); i++) {
const char* pkgname = packageNames[i].c_str();
atrace_pm_begin("data");
auto cePath = create_data_user_ce_package_path(uuid_, userId, pkgname, ceDataInodes[i]);
collectManualStats(cePath, &stats);
auto dePath = create_data_user_de_package_path(uuid_, userId, pkgname);
collectManualStats(dePath, &stats);
atrace_pm_end();
// In case of sdk sandbox storage (e.g. /data/misc_ce/0/sdksandbox/<package-name>),
// collect individual stats of each subdirectory (shared, storage of each sdk etc.)
if (appId >= AID_APP_START && appId <= AID_APP_END) {
atrace_pm_begin("sdksandbox");
auto sdkSandboxCePath =
create_data_misc_sdk_sandbox_package_path(uuid_, true, userId, pkgname);
collectManualStatsForSubDirectories(sdkSandboxCePath, &stats);
auto sdkSandboxDePath =
create_data_misc_sdk_sandbox_package_path(uuid_, false, userId, pkgname);
collectManualStatsForSubDirectories(sdkSandboxDePath, &stats);
atrace_pm_end();
}
if (!uuid) {
atrace_pm_begin("profiles");
calculate_tree_size(
create_primary_current_profile_package_dir_path(userId, pkgname),
&stats.dataSize);
calculate_tree_size(
create_primary_reference_profile_package_dir_path(pkgname),
&stats.codeSize);
atrace_pm_end();
}
atrace_pm_begin("external");
auto extPath = create_data_media_package_path(uuid_, userId, "data", pkgname);
collectManualStats(extPath, &extStats);
auto mediaPath = create_data_media_package_path(uuid_, userId, "media", pkgname);
calculate_tree_size(mediaPath, &extStats.dataSize);
atrace_pm_end();
}
if (!uuid) {
atrace_pm_begin("dalvik");
int32_t sharedGid = multiuser_get_shared_gid(0, appId);
if (sharedGid != -1) {
calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize,
sharedGid, -1);
}
atrace_pm_end();
}
}
std::vector<int64_t> ret;
ret.push_back(stats.codeSize);
ret.push_back(stats.dataSize);
ret.push_back(stats.cacheSize);
ret.push_back(extStats.codeSize);
ret.push_back(extStats.dataSize);
ret.push_back(extStats.cacheSize);
#if MEASURE_DEBUG
LOG(DEBUG) << "Final result " << toString(ret);
#endif
*_aidl_return = ret;
return ok();
}
struct external_sizes {
int64_t audioSize;
int64_t videoSize;
int64_t imageSize;
int64_t totalSize; // excludes OBBs (Android/obb), but includes app data + cache
int64_t obbSize;
};
#define PER_USER_RANGE 100000
static long getProjectIdForUser(int userId, long projectId) {
return userId * PER_USER_RANGE + projectId;
}
static external_sizes getExternalSizesForUserWithQuota(const std::string& uuid, int32_t userId, const std::vector<int32_t>& appIds) {
struct external_sizes sizes = {};
int64_t space;
if (supports_sdcardfs()) {
uid_t uid = multiuser_get_uid(userId, AID_MEDIA_RW);
if ((space = GetOccupiedSpaceForUid(uuid, uid)) != -1) {
sizes.totalSize = space;
}
gid_t audioGid = multiuser_get_uid(userId, AID_MEDIA_AUDIO);
if ((space = GetOccupiedSpaceForGid(uuid, audioGid)) != -1) {
sizes.audioSize = space;
}
gid_t videoGid = multiuser_get_uid(userId, AID_MEDIA_VIDEO);
if ((space = GetOccupiedSpaceForGid(uuid, videoGid)) != -1) {
sizes.videoSize = space;
}
gid_t imageGid = multiuser_get_uid(userId, AID_MEDIA_IMAGE);
if ((space = GetOccupiedSpaceForGid(uuid, imageGid)) != -1) {
sizes.imageSize = space;
}
if ((space = GetOccupiedSpaceForGid(uuid, AID_MEDIA_OBB)) != -1) {
sizes.obbSize = space;
}
} else {
int64_t totalSize = 0;
long defaultProjectId = getProjectIdForUser(userId, PROJECT_ID_EXT_DEFAULT);
if ((space = GetOccupiedSpaceForProjectId(uuid, defaultProjectId)) != -1) {
// This is all files that are not audio/video/images, excluding
// OBBs and app-private data
totalSize += space;
}
long audioProjectId = getProjectIdForUser(userId, PROJECT_ID_EXT_MEDIA_AUDIO);
if ((space = GetOccupiedSpaceForProjectId(uuid, audioProjectId)) != -1) {
sizes.audioSize = space;
totalSize += space;
}
long videoProjectId = getProjectIdForUser(userId, PROJECT_ID_EXT_MEDIA_VIDEO);
if ((space = GetOccupiedSpaceForProjectId(uuid, videoProjectId)) != -1) {
sizes.videoSize = space;
totalSize += space;
}
long imageProjectId = getProjectIdForUser(userId, PROJECT_ID_EXT_MEDIA_IMAGE);
if ((space = GetOccupiedSpaceForProjectId(uuid, imageProjectId)) != -1) {
sizes.imageSize = space;
totalSize += space;
}
int64_t totalAppDataSize = 0;
int64_t totalAppCacheSize = 0;
int64_t totalAppObbSize = 0;
for (auto appId : appIds) {
if (appId >= AID_APP_START) {
// App data
uid_t uid = multiuser_get_uid(userId, appId);
long projectId = uid - AID_APP_START + PROJECT_ID_EXT_DATA_START;
totalAppDataSize += GetOccupiedSpaceForProjectId(uuid, projectId);
// App cache
long cacheProjectId = uid - AID_APP_START + PROJECT_ID_EXT_CACHE_START;
totalAppCacheSize += GetOccupiedSpaceForProjectId(uuid, cacheProjectId);
// App OBBs
long obbProjectId = uid - AID_APP_START + PROJECT_ID_EXT_OBB_START;
totalAppObbSize += GetOccupiedSpaceForProjectId(uuid, obbProjectId);
}
}
// Total size should include app data + cache
totalSize += totalAppDataSize;
totalSize += totalAppCacheSize;
sizes.totalSize = totalSize;
// Only OBB is separate
sizes.obbSize = totalAppObbSize;
}
return sizes;
}
binder::Status InstalldNativeService::getUserSize(const std::optional<std::string>& uuid,
int32_t userId, int32_t flags, const std::vector<int32_t>& appIds,
std::vector<int64_t>* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
// NOTE: Locking is relaxed on this method, since it's limited to
// read-only measurements without mutation.
// When modifying this logic, always verify using tests:
// runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetUserSize
#if MEASURE_DEBUG
LOG(INFO) << "Measuring user " << userId;
#endif
struct stats stats;
struct stats extStats;
memset(&stats, 0, sizeof(stats));
memset(&extStats, 0, sizeof(extStats));
auto uuidString = uuid.value_or("");
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
if (!IsQuotaSupported(uuidString)) {
flags &= ~FLAG_USE_QUOTA;
}
if (flags & FLAG_USE_QUOTA) {
atrace_pm_begin("code");
calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize, -1, -1, true);
atrace_pm_end();
atrace_pm_begin("data");
auto cePath = create_data_user_ce_path(uuid_, userId);
collectManualStatsForUser(cePath, &stats, true);
auto dePath = create_data_user_de_path(uuid_, userId);
collectManualStatsForUser(dePath, &stats, true);
atrace_pm_end();
if (!uuid) {
atrace_pm_begin("profile");
auto userProfilePath = create_primary_cur_profile_dir_path(userId);
calculate_tree_size(userProfilePath, &stats.dataSize, -1, -1, true);
auto refProfilePath = create_primary_ref_profile_dir_path();
calculate_tree_size(refProfilePath, &stats.codeSize, -1, -1, true);
atrace_pm_end();
}
atrace_pm_begin("external");
auto sizes = getExternalSizesForUserWithQuota(uuidString, userId, appIds);
extStats.dataSize += sizes.totalSize;
extStats.codeSize += sizes.obbSize;
atrace_pm_end();
if (!uuid) {
atrace_pm_begin("dalvik");
calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize,
-1, -1, true);
calculate_tree_size(create_primary_cur_profile_dir_path(userId), &stats.dataSize,
-1, -1, true);
atrace_pm_end();
}
atrace_pm_begin("quota");
int64_t dataSize = extStats.dataSize;
for (auto appId : appIds) {
if (appId >= AID_APP_START) {
collectQuotaStats(uuidString, userId, appId, &stats, &extStats);
#if MEASURE_DEBUG
// Sleep to make sure we don't lose logs
usleep(1);
#endif
}
}
extStats.dataSize = dataSize;
atrace_pm_end();
} else {
atrace_pm_begin("code");
calculate_tree_size(create_data_app_path(uuid_), &stats.codeSize);
atrace_pm_end();
atrace_pm_begin("data");
auto cePath = create_data_user_ce_path(uuid_, userId);
collectManualStatsForUser(cePath, &stats);
auto dePath = create_data_user_de_path(uuid_, userId);
collectManualStatsForUser(dePath, &stats);
atrace_pm_end();
atrace_pm_begin("sdksandbox");
auto sdkSandboxCePath = create_data_misc_sdk_sandbox_path(uuid_, true, userId);
collectManualStatsForUser(sdkSandboxCePath, &stats, false, true);
auto sdkSandboxDePath = create_data_misc_sdk_sandbox_path(uuid_, false, userId);
collectManualStatsForUser(sdkSandboxDePath, &stats, false, true);
atrace_pm_end();
if (!uuid) {
atrace_pm_begin("profile");
auto userProfilePath = create_primary_cur_profile_dir_path(userId);
calculate_tree_size(userProfilePath, &stats.dataSize);
auto refProfilePath = create_primary_ref_profile_dir_path();
calculate_tree_size(refProfilePath, &stats.codeSize);
atrace_pm_end();
}
atrace_pm_begin("external");
auto dataMediaPath = create_data_media_path(uuid_, userId);
collectManualExternalStatsForUser(dataMediaPath, &extStats);
#if MEASURE_DEBUG
LOG(DEBUG) << "Measured external data " << extStats.dataSize << " cache "
<< extStats.cacheSize << " code " << extStats.codeSize;
#endif
atrace_pm_end();
if (!uuid) {
atrace_pm_begin("dalvik");
calculate_tree_size(create_data_dalvik_cache_path(), &stats.codeSize);
calculate_tree_size(create_primary_cur_profile_dir_path(userId), &stats.dataSize);
atrace_pm_end();
}
}
std::vector<int64_t> ret;
ret.push_back(stats.codeSize);
ret.push_back(stats.dataSize);
ret.push_back(stats.cacheSize);
ret.push_back(extStats.codeSize);
ret.push_back(extStats.dataSize);
ret.push_back(extStats.cacheSize);
#if MEASURE_DEBUG
LOG(DEBUG) << "Final result " << toString(ret);
#endif
*_aidl_return = ret;
return ok();
}
binder::Status InstalldNativeService::getExternalSize(const std::optional<std::string>& uuid,
int32_t userId, int32_t flags, const std::vector<int32_t>& appIds,
std::vector<int64_t>* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
// NOTE: Locking is relaxed on this method, since it's limited to
// read-only measurements without mutation.
// When modifying this logic, always verify using tests:
// runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/pm/InstallerTest.java -m testGetExternalSize
#if MEASURE_DEBUG
LOG(INFO) << "Measuring external " << userId;
#endif
auto uuidString = uuid.value_or("");
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
int64_t totalSize = 0;
int64_t audioSize = 0;
int64_t videoSize = 0;
int64_t imageSize = 0;
int64_t appSize = 0;
int64_t obbSize = 0;
if (!IsQuotaSupported(uuidString)) {
flags &= ~FLAG_USE_QUOTA;
}
if (flags & FLAG_USE_QUOTA) {
atrace_pm_begin("quota");
auto sizes = getExternalSizesForUserWithQuota(uuidString, userId, appIds);
totalSize = sizes.totalSize;
audioSize = sizes.audioSize;
videoSize = sizes.videoSize;
imageSize = sizes.imageSize;
obbSize = sizes.obbSize;
atrace_pm_end();
atrace_pm_begin("apps");
struct stats extStats;
memset(&extStats, 0, sizeof(extStats));
for (auto appId : appIds) {
if (appId >= AID_APP_START) {
collectQuotaStats(uuidString, userId, appId, nullptr, &extStats);
}
}
appSize = extStats.dataSize;
atrace_pm_end();
} else {
atrace_pm_begin("manual");
FTS *fts;
FTSENT *p;
auto path = create_data_media_path(uuid_, userId);
char *argv[] = { (char*) path.c_str(), nullptr };
if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr))) {
return error("Failed to fts_open " + path);
}
while ((p = fts_read(fts)) != nullptr) {
char* ext;
int64_t size = (p->fts_statp->st_blocks * 512);
switch (p->fts_info) {
case FTS_F:
// Only categorize files not belonging to apps
if (p->fts_parent->fts_number == 0) {
ext = strrchr(p->fts_name, '.');
if (ext != nullptr) {
switch (MatchExtension(++ext)) {
case AID_MEDIA_AUDIO: audioSize += size; break;
case AID_MEDIA_VIDEO: videoSize += size; break;
case AID_MEDIA_IMAGE: imageSize += size; break;
}
}
}
[[fallthrough]]; // always count against total
case FTS_D:
// Ignore data belonging to specific apps
p->fts_number = p->fts_parent->fts_number;
if (p->fts_level == 1 && !strcmp(p->fts_name, "Android")) {
p->fts_number = 1;
}
[[fallthrough]]; // always count against total
case FTS_DEFAULT:
case FTS_SL:
case FTS_SLNONE:
if (p->fts_parent->fts_number == 1) {
appSize += size;
}
totalSize += size;
break;
}
}
fts_close(fts);
atrace_pm_end();
atrace_pm_begin("obb");
auto obbPath = StringPrintf("%s/Android/obb",
create_data_media_path(uuid_, userId).c_str());
calculate_tree_size(obbPath, &obbSize);
if (!(flags & FLAG_USE_QUOTA)) {
totalSize -= obbSize;
}
atrace_pm_end();
}
std::vector<int64_t> ret;
ret.push_back(totalSize);
ret.push_back(audioSize);
ret.push_back(videoSize);
ret.push_back(imageSize);
ret.push_back(appSize);
ret.push_back(obbSize);
#if MEASURE_DEBUG
LOG(DEBUG) << "Final result " << toString(ret);
#endif
*_aidl_return = ret;
return ok();
}
binder::Status InstalldNativeService::getAppCrates(
const std::optional<std::string>& uuid,
const std::vector<std::string>& packageNames, int32_t userId,
std::optional<std::vector<std::optional<CrateMetadata>>>* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
for (const auto& packageName : packageNames) {
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
}
#ifdef ENABLE_STORAGE_CRATES
LOCK_PACKAGE_USER();
auto retVector = std::vector<std::optional<CrateMetadata>>();
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
std::function<void(CratedFolder, CrateMetadata&&)> onCreateCrate =
[&](CratedFolder cratedFolder, CrateMetadata&& crateMetadata) -> void {
if (cratedFolder == nullptr) {
return;
}
retVector.push_back(std::move(crateMetadata));
};
for (const auto& packageName : packageNames) {
#if CRATE_DEBUG
LOG(DEBUG) << "packageName = " << packageName;
#endif
auto crateManager = std::make_unique<CrateManager>(uuid_, userId, packageName);
crateManager->traverseAllCrates(onCreateCrate);
}
#if CRATE_DEBUG
LOG(WARNING) << "retVector.size() =" << retVector.size();
for (auto& item : retVector) {
CrateManager::dump(*item);
}
#endif
*_aidl_return = std::move(retVector);
#else // ENABLE_STORAGE_CRATES
_aidl_return->reset();
/* prevent compile warning fail */
if (userId < 0) {
return error();
}
#endif // ENABLE_STORAGE_CRATES
return ok();
}
binder::Status InstalldNativeService::getUserCrates(
const std::optional<std::string>& uuid, int32_t userId,
std::optional<std::vector<std::optional<CrateMetadata>>>* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
#ifdef ENABLE_STORAGE_CRATES
LOCK_USER();
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
auto retVector = std::vector<std::optional<CrateMetadata>>();
std::function<void(CratedFolder, CrateMetadata&&)> onCreateCrate =
[&](CratedFolder cratedFolder, CrateMetadata&& crateMetadata) -> void {
if (cratedFolder == nullptr) {
return;
}
retVector.push_back(std::move(crateMetadata));
};
std::function<void(FTSENT*)> onHandingPackage = [&](FTSENT* packageDir) -> void {
auto crateManager = std::make_unique<CrateManager>(uuid_, userId, packageDir->fts_name);
crateManager->traverseAllCrates(onCreateCrate);
};
CrateManager::traverseAllPackagesForUser(uuid, userId, onHandingPackage);
#if CRATE_DEBUG
LOG(DEBUG) << "retVector.size() =" << retVector.size();
for (auto& item : retVector) {
CrateManager::dump(*item);
}
#endif
*_aidl_return = std::move(retVector);
#else // ENABLE_STORAGE_CRATES
_aidl_return->reset();
/* prevent compile warning fail */
if (userId < 0) {
return error();
}
#endif // ENABLE_STORAGE_CRATES
return ok();
}
binder::Status InstalldNativeService::setAppQuota(const std::optional<std::string>& uuid,
int32_t userId, int32_t appId, int64_t cacheQuota) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
std::lock_guard<std::recursive_mutex> lock(mQuotasLock);
int32_t uid = multiuser_get_uid(userId, appId);
mCacheQuotas[uid] = cacheQuota;
return ok();
}
// 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& profileName,
const std::string& codePath,
bool dumpClassesAndMethods, bool* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_PATH(codePath);
LOCK_PACKAGE();
*_aidl_return = dump_profiles(uid, packageName, profileName, codePath, dumpClassesAndMethods);
return ok();
}
// Copy the contents of a system profile over the data profile.
binder::Status InstalldNativeService::copySystemProfile(const std::string& systemProfile,
int32_t packageUid, const std::string& packageName, const std::string& profileName,
bool* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PATH(systemProfile);
if (!base::EndsWith(systemProfile, ".prof")) {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
StringPrintf("System profile path %s does not end with .prof",
systemProfile.c_str()));
}
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_FILE_NAME(profileName);
if (!base::EndsWith(profileName, ".prof")) {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
StringPrintf("Profile name %s does not end with .prof",
profileName.c_str()));
}
LOCK_PACKAGE();
*_aidl_return = copy_system_profile(systemProfile, packageUid, packageName, profileName);
return ok();
}
// TODO: Consider returning error codes.
binder::Status InstalldNativeService::mergeProfiles(int32_t uid, const std::string& packageName,
const std::string& profileName, int* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE();
*_aidl_return = analyze_primary_profiles(uid, packageName, profileName);
return ok();
}
binder::Status InstalldNativeService::createProfileSnapshot(int32_t appId,
const std::string& packageName, const std::string& profileName,
const std::string& classpath, bool* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE();
*_aidl_return = create_profile_snapshot(appId, packageName, profileName, classpath);
return ok();
}
binder::Status InstalldNativeService::destroyProfileSnapshot(const std::string& packageName,
const std::string& profileName) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE();
std::string snapshot = create_snapshot_profile_path(packageName, profileName);
if ((unlink(snapshot.c_str()) != 0) && (errno != ENOENT)) {
return error("Failed to destroy profile snapshot for " + packageName + ":" + profileName);
}
return ok();
}
static const char* getCStr(const std::optional<std::string>& data,
const char* default_value = nullptr) {
return data ? data->c_str() : default_value;
}
binder::Status InstalldNativeService::dexopt(
const std::string& apkPath, int32_t uid, const std::string& packageName,
const std::string& instructionSet, int32_t dexoptNeeded,
const std::optional<std::string>& outputPath, int32_t dexFlags,
const std::string& compilerFilter, const std::optional<std::string>& uuid,
const std::optional<std::string>& classLoaderContext,
const std::optional<std::string>& seInfo, bool downgrade, int32_t targetSdkVersion,
const std::optional<std::string>& profileName,
const std::optional<std::string>& dexMetadataPath,
const std::optional<std::string>& compilationReason, bool* aidl_return) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_UUID(uuid);
CHECK_ARGUMENT_PATH(apkPath);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_PATH(outputPath);
CHECK_ARGUMENT_PATH(dexMetadataPath);
const auto userId = multiuser_get_user_id(uid);
LOCK_PACKAGE_USER();
const char* oat_dir = getCStr(outputPath);
const char* instruction_set = instructionSet.c_str();
if (oat_dir != nullptr && !createOatDir(packageName, oat_dir, instruction_set).isOk()) {
// Can't create oat dir - let dexopt use cache dir.
oat_dir = nullptr;
}
const char* apk_path = apkPath.c_str();
const char* pkgname = packageName.c_str();
const char* compiler_filter = compilerFilter.c_str();
const char* volume_uuid = getCStr(uuid);
const char* class_loader_context = getCStr(classLoaderContext);
const char* se_info = getCStr(seInfo);
const char* profile_name = getCStr(profileName);
const char* dm_path = getCStr(dexMetadataPath);
const char* compilation_reason = getCStr(compilationReason);
std::string error_msg;
bool completed = false; // not necessary but for compiler
int res = android::installd::dexopt(apk_path, uid, pkgname, instruction_set, dexoptNeeded,
oat_dir, dexFlags, compiler_filter, volume_uuid, class_loader_context, se_info,
downgrade, targetSdkVersion, profile_name, dm_path, compilation_reason, &error_msg,
&completed);
*aidl_return = completed;
return res ? error(res, error_msg) : ok();
}
binder::Status InstalldNativeService::controlDexOptBlocking(bool block) {
android::installd::control_dexopt_blocking(block);
return ok();
}
binder::Status InstalldNativeService::linkNativeLibraryDirectory(
const std::optional<std::string>& uuid, const std::string& packageName,
const std::string& nativeLibPath32, int32_t userId) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_UUID(uuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_PATH(nativeLibPath32);
LOCK_PACKAGE_USER();
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
const char* pkgname = packageName.c_str();
const char* asecLibDir = nativeLibPath32.c_str();
struct stat s, libStat;
binder::Status res = ok();
auto _pkgdir = create_data_user_ce_package_path(uuid_, userId, pkgname);
auto _libsymlink = _pkgdir + PKG_LIB_POSTFIX;
const char* pkgdir = _pkgdir.c_str();
const char* libsymlink = _libsymlink.c_str();
if (stat(pkgdir, &s) < 0) {
return error("Failed to stat " + _pkgdir);
}
char *con = nullptr;
if (::lgetfilecon(pkgdir, &con) < 0) {
return error("Failed to lgetfilecon " + _pkgdir);
}
if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) {
res = error("Failed to chown " + _pkgdir);
goto out;
}
if (chmod(pkgdir, 0700) < 0) {
res = error("Failed to chmod " + _pkgdir);
goto out;
}
if (lstat(libsymlink, &libStat) < 0) {
if (errno != ENOENT) {
res = error("Failed to stat " + _libsymlink);
goto out;
}
} else {
if (S_ISDIR(libStat.st_mode)) {
if (delete_dir_contents(libsymlink, 1, nullptr) < 0) {
res = error("Failed to delete " + _libsymlink);
goto out;
}
} else if (S_ISLNK(libStat.st_mode)) {
if (unlink(libsymlink) < 0) {
res = error("Failed to unlink " + _libsymlink);
goto out;
}
}
}
if (symlink(asecLibDir, libsymlink) < 0) {
res = error("Failed to symlink " + _libsymlink + " to " + nativeLibPath32);
goto out;
}
if (lsetfilecon(libsymlink, con) < 0) {
res = error("Failed to lsetfilecon " + _libsymlink);
goto out;
}
out:
free(con);
if (chmod(pkgdir, s.st_mode) < 0) {
auto msg = "Failed to cleanup chmod " + _pkgdir;
if (res.isOk()) {
res = error(msg);
} else {
PLOG(ERROR) << msg;
}
}
if (chown(pkgdir, s.st_uid, s.st_gid) < 0) {
auto msg = "Failed to cleanup chown " + _pkgdir;
if (res.isOk()) {
res = error(msg);
} else {
PLOG(ERROR) << msg;
}
}
return res;
}
binder::Status InstalldNativeService::restoreconAppData(const std::optional<std::string>& uuid,
const std::string& packageName, int32_t userId, int32_t flags, int32_t appId,
const std::string& seInfo) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE_USER();
return restoreconAppDataLocked(uuid, packageName, userId, flags, appId, seInfo);
}
binder::Status InstalldNativeService::restoreconAppDataLocked(
const std::optional<std::string>& uuid, const std::string& packageName, int32_t userId,
int32_t flags, int32_t appId, const std::string& seInfo) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
binder::Status res = ok();
// 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();
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) {
res = error("restorecon failed for " + path);
}
}
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) {
res = error("restorecon failed for " + path);
}
}
return res;
}
binder::Status InstalldNativeService::restoreconSdkDataLocked(
const std::optional<std::string>& uuid, const std::string& packageName, int32_t userId,
int32_t flags, int32_t appId, const std::string& seInfo) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER(userId);
CHECK_ARGUMENT_UUID(uuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
binder::Status res = ok();
// 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();
uid_t uid = multiuser_get_sdk_sandbox_uid(userId, appId);
constexpr int storageFlags[2] = {FLAG_STORAGE_CE, FLAG_STORAGE_DE};
for (int currentFlag : storageFlags) {
if ((flags & currentFlag) == 0) {
continue;
}
const bool isCeData = (currentFlag == FLAG_STORAGE_CE);
const auto packagePath =
create_data_misc_sdk_sandbox_package_path(uuid_, isCeData, userId, pkgName);
if (access(packagePath.c_str(), F_OK) != 0) {
LOG(INFO) << "Missing source " << packagePath;
continue;
}
const auto subDirHandler = [&packagePath, &seinfo, &uid, &seflags,
&res](const std::string& subDir) {
const auto& fullpath = packagePath + "/" + subDir;
if (selinux_android_restorecon_pkgdir(fullpath.c_str(), seinfo, uid, seflags) < 0) {
res = error("restorecon failed for " + fullpath);
}
};
const auto ec = foreach_subdir(packagePath, subDirHandler);
if (ec != 0) {
res = error("Failed to restorecon for subdirs of " + packagePath);
}
}
return res;
}
binder::Status InstalldNativeService::createOatDir(const std::string& packageName,
const std::string& oatDir,
const std::string& instructionSet) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_PATH(oatDir);
LOCK_PACKAGE();
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)) {
return error("Invalid path " + oatDir);
}
if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) {
return error("Failed to prepare " + oatDir);
}
if (selinux_android_restorecon(oat_dir, 0)) {
return error("Failed to restorecon " + oatDir);
}
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 error(StringPrintf("Failed to prepare %s", oat_instr_dir));
}
return ok();
}
binder::Status InstalldNativeService::rmPackageDir(const std::string& packageName,
const std::string& packageDir) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PATH(packageDir);
LOCK_PACKAGE();
if (validate_apk_path(packageDir.c_str())) {
return error("Invalid path " + packageDir);
}
if (rm_package_dir(packageDir) != 0) {
return error("Failed to delete " + packageDir);
}
return ok();
}
binder::Status InstalldNativeService::linkFile(const std::string& packageName,
const std::string& relativePath,
const std::string& fromBase,
const std::string& toBase) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_PATH(fromBase);
CHECK_ARGUMENT_PATH(toBase);
LOCK_PACKAGE();
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)) {
return error(StringPrintf("Invalid from path %s", from_path));
}
if (validate_apk_path_subdirs(to_path)) {
return error(StringPrintf("Invalid to path %s", to_path));
}
if (link(from_path, to_path) < 0) {
return error(StringPrintf("Failed to link from %s to %s", from_path, to_path));
}
return ok();
}
binder::Status InstalldNativeService::moveAb(const std::string& packageName,
const std::string& apkPath,
const std::string& instructionSet,
const std::string& outputPath) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_PATH(apkPath);
CHECK_ARGUMENT_PATH(outputPath);
LOCK_PACKAGE();
const char* apk_path = apkPath.c_str();
const char* instruction_set = instructionSet.c_str();
const char* oat_dir = outputPath.c_str();
bool success = move_ab(apk_path, instruction_set, oat_dir);
return success ? ok() : error();
}
binder::Status InstalldNativeService::deleteOdex(const std::string& packageName,
const std::string& apkPath,
const std::string& instructionSet,
const std::optional<std::string>& outputPath,
int64_t* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_PATH(apkPath);
CHECK_ARGUMENT_PATH(outputPath);
LOCK_PACKAGE();
const char* apk_path = apkPath.c_str();
const char* instruction_set = instructionSet.c_str();
const char* oat_dir = outputPath ? outputPath->c_str() : nullptr;
*_aidl_return = delete_odex(apk_path, instruction_set, oat_dir);
return *_aidl_return == -1 ? error() : ok();
}
binder::Status InstalldNativeService::reconcileSecondaryDexFile(
const std::string& dexPath, const std::string& packageName, int32_t uid,
const std::vector<std::string>& isas, const std::optional<std::string>& volumeUuid,
int32_t storage_flag, bool* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_UUID(volumeUuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_PATH(dexPath);
const auto userId = multiuser_get_user_id(uid);
LOCK_PACKAGE_USER();
bool result = android::installd::reconcile_secondary_dex_file(
dexPath, packageName, uid, isas, volumeUuid, storage_flag, _aidl_return);
return result ? ok() : error();
}
binder::Status InstalldNativeService::hashSecondaryDexFile(
const std::string& dexPath, const std::string& packageName, int32_t uid,
const std::optional<std::string>& volumeUuid, int32_t storageFlag,
std::vector<uint8_t>* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_UUID(volumeUuid);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_PATH(dexPath);
// mLock is not taken here since we will never modify the file system.
// If a file is modified just as we are reading it this may result in an
// anomalous hash, but that's ok.
bool result = android::installd::hash_secondary_dex_file(
dexPath, packageName, uid, volumeUuid, storageFlag, _aidl_return);
return result ? ok() : error();
}
/**
* Returns true if ioctl feature (F2FS_IOC_FS{GET,SET}XATTR) is supported as
* these were introduced in Linux 4.14, so kernel versions before that will fail
* while setting project id attributes. Only when these features are enabled,
* storage calculation using project_id is enabled
*/
bool check_if_ioctl_feature_is_supported() {
bool result = false;
auto temp_path = StringPrintf("%smisc/installd/ioctl_check", android_data_dir.c_str());
if (access(temp_path.c_str(), F_OK) != 0) {
int fd = open(temp_path.c_str(), O_CREAT | O_TRUNC | O_RDWR | O_CLOEXEC, 0644);
result = set_quota_project_id(temp_path, 0, false) == 0;
close(fd);
// delete the temp file
remove(temp_path.c_str());
}
return result;
}
binder::Status InstalldNativeService::setFirstBoot() {
ENFORCE_UID(AID_SYSTEM);
std::lock_guard<std::recursive_mutex> lock(mMountsLock);
std::string uuid;
if (GetOccupiedSpaceForProjectId(uuid, 0) != -1 && check_if_ioctl_feature_is_supported()) {
auto first_boot_path =
StringPrintf("%smisc/installd/using_project_ids", android_data_dir.c_str());
if (access(first_boot_path.c_str(), F_OK) != 0) {
close(open(first_boot_path.c_str(), O_CREAT | O_TRUNC | O_RDWR | O_CLOEXEC, 0644));
}
}
return ok();
}
binder::Status InstalldNativeService::invalidateMounts() {
ENFORCE_UID(AID_SYSTEM);
std::lock_guard<std::recursive_mutex> lock(mMountsLock);
mStorageMounts.clear();
#if !BYPASS_QUOTA
if (!InvalidateQuotaMounts()) {
return error("Failed to read mounts");
}
#endif
std::ifstream in("/proc/mounts");
if (!in.is_open()) {
return error("Failed to read mounts");
}
std::string source;
std::string target;
std::string ignored;
while (!in.eof()) {
std::getline(in, source, ' ');
std::getline(in, target, ' ');
std::getline(in, ignored);
if (android::base::GetBoolProperty(kFuseProp, false)) {
if (target.find(kMntFuse) == 0) {
LOG(DEBUG) << "Found storage mount " << source << " at " << target;
mStorageMounts[source] = target;
}
} else {
#if !BYPASS_SDCARDFS
if (target.find(kMntSdcardfs) == 0) {
LOG(DEBUG) << "Found storage mount " << source << " at " << target;
mStorageMounts[source] = target;
}
#endif
}
}
return ok();
}
// Mount volume's CE and DE storage to mirror
binder::Status InstalldNativeService::tryMountDataMirror(
const std::optional<std::string>& uuid) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_UUID(uuid);
if (!sAppDataIsolationEnabled) {
return ok();
}
if (!uuid) {
return error("Should not happen, mounting uuid == null");
}
const char* uuid_ = uuid->c_str();
std::lock_guard<std::recursive_mutex> lock(mMountsLock);
std::string mirrorVolCePath(StringPrintf("%s/%s", kDataMirrorCePath, uuid_));
if (fs_prepare_dir(mirrorVolCePath.c_str(), 0511, AID_SYSTEM, AID_SYSTEM) != 0) {
return error("Failed to create CE data mirror");
}
std::string mirrorVolDePath(StringPrintf("%s/%s", kDataMirrorDePath, uuid_));
if (fs_prepare_dir(mirrorVolDePath.c_str(), 0511, AID_SYSTEM, AID_SYSTEM) != 0) {
return error("Failed to create DE data mirror");
}
std::string mirrorVolMiscCePath(StringPrintf("%s/%s", kMiscMirrorCePath, uuid_));
if (fs_prepare_dir(mirrorVolMiscCePath.c_str(), 0511, AID_SYSTEM, AID_SYSTEM) != 0) {
return error("Failed to create CE misc mirror");
}
std::string mirrorVolMiscDePath(StringPrintf("%s/%s", kMiscMirrorDePath, uuid_));
if (fs_prepare_dir(mirrorVolMiscDePath.c_str(), 0511, AID_SYSTEM, AID_SYSTEM) != 0) {
return error("Failed to create DE misc mirror");
}
auto cePath = StringPrintf("%s/user", create_data_path(uuid_).c_str());
auto dePath = StringPrintf("%s/user_de", create_data_path(uuid_).c_str());
auto miscCePath = StringPrintf("%s/misc_ce", create_data_path(uuid_).c_str());
auto miscDePath = StringPrintf("%s/misc_de", create_data_path(uuid_).c_str());
if (access(cePath.c_str(), F_OK) != 0) {
return error("Cannot access CE path: " + cePath);
}
if (access(dePath.c_str(), F_OK) != 0) {
return error("Cannot access DE path: " + dePath);
}
if (access(miscCePath.c_str(), F_OK) != 0) {
return error("Cannot access misc CE path: " + cePath);
}
if (access(miscDePath.c_str(), F_OK) != 0) {
return error("Cannot access misc DE path: " + dePath);
}
struct stat ceStat, mirrorCeStat;
if (stat(cePath.c_str(), &ceStat) != 0) {
return error("Failed to stat " + cePath);
}
if (stat(mirrorVolCePath.c_str(), &mirrorCeStat) != 0) {
return error("Failed to stat " + mirrorVolCePath);
}
if (mirrorCeStat.st_ino == ceStat.st_ino && mirrorCeStat.st_dev == ceStat.st_dev) {
// As it's being called by prepareUserStorage, it can be called multiple times.
// Hence, we if we mount it already, we should skip it.
LOG(INFO) << "CE dir is mounted already: " + cePath;
return ok();
}
// Mount CE mirror
if (TEMP_FAILURE_RETRY(mount(cePath.c_str(), mirrorVolCePath.c_str(), NULL,
MS_NOSUID | MS_NODEV | MS_NOATIME | MS_BIND | MS_NOEXEC, nullptr)) == -1) {
return error("Failed to mount " + mirrorVolCePath);
}
// Mount DE mirror
if (TEMP_FAILURE_RETRY(mount(dePath.c_str(), mirrorVolDePath.c_str(), NULL,
MS_NOSUID | MS_NODEV | MS_NOATIME | MS_BIND | MS_NOEXEC, nullptr)) == -1) {
return error("Failed to mount " + mirrorVolDePath);
}
// Mount misc CE mirror
if (TEMP_FAILURE_RETRY(mount(miscCePath.c_str(), mirrorVolMiscCePath.c_str(), NULL,
MS_NOSUID | MS_NODEV | MS_NOATIME | MS_BIND | MS_NOEXEC,
nullptr)) == -1) {
return error("Failed to mount " + mirrorVolMiscCePath);
}
// Mount misc DE mirror
if (TEMP_FAILURE_RETRY(mount(miscDePath.c_str(), mirrorVolMiscDePath.c_str(), NULL,
MS_NOSUID | MS_NODEV | MS_NOATIME | MS_BIND | MS_NOEXEC,
nullptr)) == -1) {
return error("Failed to mount " + mirrorVolMiscDePath);
}
return ok();
}
// Unmount volume's CE and DE storage from mirror
binder::Status InstalldNativeService::onPrivateVolumeRemoved(
const std::optional<std::string>& uuid) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_UUID(uuid);
if (!sAppDataIsolationEnabled) {
return ok();
}
if (!uuid) {
// It happens when private volume failed to mount.
LOG(INFO) << "Ignore unmount uuid=null";
return ok();
}
const char* uuid_ = uuid->c_str();
binder::Status res = ok();
std::string mirrorCeVolPath(StringPrintf("%s/%s", kDataMirrorCePath, uuid_));
std::string mirrorDeVolPath(StringPrintf("%s/%s", kDataMirrorDePath, uuid_));
std::string mirrorMiscCeVolPath(StringPrintf("%s/%s", kMiscMirrorCePath, uuid_));
std::string mirrorMiscDeVolPath(StringPrintf("%s/%s", kMiscMirrorDePath, uuid_));
std::lock_guard<std::recursive_mutex> lock(mMountsLock);
// Unmount CE storage
if (TEMP_FAILURE_RETRY(umount(mirrorCeVolPath.c_str())) != 0) {
if (errno != ENOENT) {
res = error(StringPrintf("Failed to umount %s %s", mirrorCeVolPath.c_str(),
strerror(errno)));
}
}
if (delete_dir_contents_and_dir(mirrorCeVolPath, true) != 0) {
res = error("Failed to delete " + mirrorCeVolPath);
}
// Unmount DE storage
if (TEMP_FAILURE_RETRY(umount(mirrorDeVolPath.c_str())) != 0) {
if (errno != ENOENT) {
res = error(StringPrintf("Failed to umount %s %s", mirrorDeVolPath.c_str(),
strerror(errno)));
}
}
if (delete_dir_contents_and_dir(mirrorDeVolPath, true) != 0) {
res = error("Failed to delete " + mirrorDeVolPath);
}
// Unmount misc CE storage
if (TEMP_FAILURE_RETRY(umount(mirrorMiscCeVolPath.c_str())) != 0) {
if (errno != ENOENT) {
res = error(StringPrintf("Failed to umount %s %s", mirrorMiscCeVolPath.c_str(),
strerror(errno)));
}
}
if (delete_dir_contents_and_dir(mirrorMiscCeVolPath, true) != 0) {
res = error("Failed to delete " + mirrorMiscCeVolPath);
}
// Unmount misc DE storage
if (TEMP_FAILURE_RETRY(umount(mirrorMiscDeVolPath.c_str())) != 0) {
if (errno != ENOENT) {
res = error(StringPrintf("Failed to umount %s %s", mirrorMiscDeVolPath.c_str(),
strerror(errno)));
}
}
if (delete_dir_contents_and_dir(mirrorMiscDeVolPath, true) != 0) {
res = error("Failed to delete " + mirrorMiscDeVolPath);
}
return res;
}
std::string InstalldNativeService::findDataMediaPath(
const std::optional<std::string>& uuid, userid_t userid) {
std::lock_guard<std::recursive_mutex> lock(mMountsLock);
const char* uuid_ = uuid ? uuid->c_str() : nullptr;
auto path = StringPrintf("%s/media", create_data_path(uuid_).c_str());
auto resolved = mStorageMounts[path];
if (resolved.empty()) {
LOG(WARNING) << "Failed to find storage mount for " << path;
resolved = path;
}
return StringPrintf("%s/%u", resolved.c_str(), userid);
}
binder::Status InstalldNativeService::isQuotaSupported(
const std::optional<std::string>& uuid, bool* _aidl_return) {
*_aidl_return = IsQuotaSupported(uuid.value_or(""));
return ok();
}
binder::Status InstalldNativeService::prepareAppProfile(const std::string& packageName,
int32_t userId, int32_t appId, const std::string& profileName, const std::string& codePath,
const std::optional<std::string>& dexMetadata, bool* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
ENFORCE_VALID_USER_OR_NULL(userId);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_PATH(codePath);
LOCK_PACKAGE_USER();
*_aidl_return = prepare_app_profile(packageName, userId, appId, profileName, codePath,
dexMetadata);
return ok();
}
binder::Status InstalldNativeService::migrateLegacyObbData() {
ENFORCE_UID(AID_SYSTEM);
// NOTE: The lint warning doesn't apply to the use of system(3) with
// absolute parse and no command line arguments.
if (system("/system/bin/migrate_legacy_obb_data") != 0) { // NOLINT(cert-env33-c)
LOG(ERROR) << "Unable to migrate legacy obb data";
}
return ok();
}
binder::Status InstalldNativeService::cleanupInvalidPackageDirs(
const std::optional<std::string>& uuid, int32_t userId, int32_t flags) {
ENFORCE_VALID_USER(userId);
const char* uuid_cstr = uuid ? uuid->c_str() : nullptr;
if (flags & FLAG_STORAGE_CE) {
auto ce_path = create_data_user_ce_path(uuid_cstr, userId);
cleanup_invalid_package_dirs_under_path(ce_path);
auto sdksandbox_ce_path =
create_data_misc_sdk_sandbox_path(uuid_cstr, /*isCeData=*/true, userId);
cleanup_invalid_package_dirs_under_path(sdksandbox_ce_path);
}
if (flags & FLAG_STORAGE_DE) {
auto de_path = create_data_user_de_path(uuid_cstr, userId);
cleanup_invalid_package_dirs_under_path(de_path);
auto sdksandbox_de_path =
create_data_misc_sdk_sandbox_path(uuid_cstr, /*isCeData=*/false, userId);
cleanup_invalid_package_dirs_under_path(sdksandbox_de_path);
}
return ok();
}
binder::Status InstalldNativeService::getOdexVisibility(
const std::string& packageName, const std::string& apkPath,
const std::string& instructionSet, const std::optional<std::string>& outputPath,
int32_t* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
CHECK_ARGUMENT_PATH(apkPath);
CHECK_ARGUMENT_PATH(outputPath);
LOCK_PACKAGE();
const char* apk_path = apkPath.c_str();
const char* instruction_set = instructionSet.c_str();
const char* oat_dir = outputPath ? outputPath->c_str() : nullptr;
*_aidl_return = get_odex_visibility(apk_path, instruction_set, oat_dir);
return *_aidl_return == -1 ? error() : ok();
}
// Creates an auth token to be used in enableFsverity. This token is really to store a proof that
// the caller can write to a file, represented by the authFd. Effectively, system_server as the
// attacker-in-the-middle cannot enable fs-verity on arbitrary app files. If the FD is not writable,
// return null.
//
// app process uid is passed for additional ownership check, such that one app can not be
// authenticated for another app's file. These parameters are assumed trusted for this purpose of
// consistency check.
//
// Notably, creating the token allows us to manage the writable FD easily during enableFsverity.
// Since enabling fs-verity to a file requires no outstanding writable FD, passing the authFd to the
// server allows the server to hold the only reference (as long as the client app doesn't).
binder::Status InstalldNativeService::createFsveritySetupAuthToken(
const ParcelFileDescriptor& authFd, int32_t uid,
sp<IFsveritySetupAuthToken>* _aidl_return) {
CHECK_ARGUMENT_APP_ID(multiuser_get_app_id(uid));
ENFORCE_VALID_USER(multiuser_get_user_id(uid));
auto token = sp<FsveritySetupAuthToken>::make();
binder::Status status = token->authenticate(authFd, uid);
if (!status.isOk()) {
return status;
}
*_aidl_return = token;
return ok();
}
// Enables fs-verity for filePath, which must be an absolute path and the same inode as in the auth
// token previously returned from createFsveritySetupAuthToken, and owned by the app uid. As
// installd is more privileged than its client / system server, we attempt to limit what a
// (compromised) client can do.
//
// The reason for this app request to go through installd is to avoid exposing a risky area (PKCS#7
// signature verification) in the kernel to the app as an attack surface (it can't be system server
// because it can't override DAC and manipulate app files). Note that we should be able to drop
// these hops and simply the app calls the ioctl, once all upgrading devices run with a kernel
// without fs-verity built-in signature (https://r.android.com/2650402).
binder::Status InstalldNativeService::enableFsverity(const sp<IFsveritySetupAuthToken>& authToken,
const std::string& filePath,
const std::string& packageName,
int32_t* _aidl_return) {
ENFORCE_UID(AID_SYSTEM);
CHECK_ARGUMENT_PATH(filePath);
CHECK_ARGUMENT_PACKAGE_NAME(packageName);
LOCK_PACKAGE();
if (authToken == nullptr) {
return exception(binder::Status::EX_ILLEGAL_ARGUMENT, "Received a null auth token");
}
// Authenticate to check the targeting file is the same inode as the authFd. With O_PATH, we
// prevent a malicious client from blocking installd by providing a path to FIFO. After the
// authentication, the actual open is safe.
sp<IBinder> authTokenBinder = IInterface::asBinder(authToken)->localBinder();
if (authTokenBinder == nullptr) {
return exception(binder::Status::EX_SECURITY, "Received a non-local auth token");
}
unique_fd pathFd(open(filePath.c_str(), O_RDONLY | O_CLOEXEC | O_NOFOLLOW | O_PATH));
// Returns a constant errno to avoid one app probing file existence of the others, before the
// authentication is done.
const int kFixedErrno = EPERM;
if (pathFd.get() < 0) {
PLOG(DEBUG) << "Failed to open the path";
*_aidl_return = kFixedErrno;
return ok();
}
std::string procFdPath(StringPrintf("/proc/self/fd/%d", pathFd.get()));
struct stat stFromPath;
if (stat(procFdPath.c_str(), &stFromPath) < 0) {
PLOG(DEBUG) << "Failed to stat proc fd " << pathFd.get() << " -> " << filePath;
*_aidl_return = kFixedErrno;
return ok();
}
auto authTokenInstance = sp<FsveritySetupAuthToken>::cast(authTokenBinder);
if (!authTokenInstance->isSameStat(stFromPath)) {
LOG(DEBUG) << "FD authentication failed";
*_aidl_return = kFixedErrno;
return ok();
}
unique_fd rfd(open(procFdPath.c_str(), O_RDONLY | O_CLOEXEC));
fsverity_enable_arg arg = {};
arg.version = 1;
arg.hash_algorithm = FS_VERITY_HASH_ALG_SHA256;
arg.block_size = 4096;
if (ioctl(rfd.get(), FS_IOC_ENABLE_VERITY, &arg) < 0) {
*_aidl_return = errno;
} else {
*_aidl_return = 0;
}
return ok();
}
} // namespace installd
} // namespace android