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-rw-r--r--cmds/installd/InstalldNativeService.cpp105
-rw-r--r--cmds/installd/InstalldNativeService.h2
-rw-r--r--cmds/installd/QuotaUtils.cpp4
-rw-r--r--cmds/installd/binder/android/os/IInstalld.aidl2
4 files changed, 110 insertions, 3 deletions
diff --git a/cmds/installd/InstalldNativeService.cpp b/cmds/installd/InstalldNativeService.cpp
index f5a53f19aa..2d99715fcf 100644
--- a/cmds/installd/InstalldNativeService.cpp
+++ b/cmds/installd/InstalldNativeService.cpp
@@ -31,6 +31,7 @@
#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>
@@ -86,6 +87,9 @@ 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 int MIN_RESTRICTED_HOME_SDK_VERSION = 24; // > M
static constexpr const char* PKG_LIB_POSTFIX = "/lib";
@@ -99,6 +103,13 @@ static constexpr size_t kSha256Size = 32;
static constexpr const char* kPropApkVerityMode = "ro.apk_verity.mode";
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 std::atomic<bool> sAppDataIsolationEnabled(false);
+
namespace {
constexpr const char* kDump = "android.permission.DUMP";
@@ -258,6 +269,8 @@ status_t InstalldNativeService::start() {
sp<ProcessState> ps(ProcessState::self());
ps->startThreadPool();
ps->giveThreadPoolName();
+ sAppDataIsolationEnabled = android::base::GetBoolProperty(
+ kAppDataIsolationEnabledProperty, false);
return android::OK;
}
@@ -450,9 +463,12 @@ binder::Status InstalldNativeService::createAppData(const std::unique_ptr<std::s
// And return the CE inode of the top-level data directory so we can
// clear contents while CE storage is locked
- if ((_aidl_return != nullptr)
- && get_path_inode(path, reinterpret_cast<ino_t*>(_aidl_return)) != 0) {
- return error("Failed to get_path_inode for " + path);
+ if (_aidl_return != nullptr) {
+ ino_t result;
+ if (get_path_inode(path, &result) != 0) {
+ return error("Failed to get_path_inode for " + path);
+ }
+ *_aidl_return = static_cast<uint64_t>(result);
}
}
if (flags & FLAG_STORAGE_DE) {
@@ -2613,6 +2629,89 @@ binder::Status InstalldNativeService::invalidateMounts() {
return ok();
}
+// Mount volume's CE and DE storage to mirror
+binder::Status InstalldNativeService::onPrivateVolumeMounted(
+ const std::unique_ptr<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();
+ // Mount CE mirror
+ std::string mirrorVolCePath(StringPrintf("%s/%s", kDataMirrorCePath, uuid_));
+ std::lock_guard<std::recursive_mutex> lock(mLock);
+ if (fs_prepare_dir(mirrorVolCePath.c_str(), 0700, AID_ROOT, AID_ROOT) != 0) {
+ return error("Failed to create CE mirror");
+ }
+ auto cePath = StringPrintf("%s/user_ce", create_data_path(uuid_).c_str());
+ 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
+ std::string mirrorVolDePath(StringPrintf("%s/%s", kDataMirrorDePath, uuid_));
+ if (fs_prepare_dir(mirrorVolDePath.c_str(), 0700, AID_ROOT, AID_ROOT) != 0) {
+ return error("Failed to create DE mirror");
+ }
+ auto dePath = StringPrintf("%s/user_de", create_data_path(uuid_).c_str());
+ 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);
+ }
+ return ok();
+}
+
+// Unmount volume's CE and DE storage from mirror
+binder::Status InstalldNativeService::onPrivateVolumeRemoved(
+ const std::unique_ptr<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_));
+
+ // Unmount CE storage
+ std::lock_guard<std::recursive_mutex> lock(mLock);
+ 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);
+ }
+ return res;
+}
+
std::string InstalldNativeService::findDataMediaPath(
const std::unique_ptr<std::string>& uuid, userid_t userid) {
std::lock_guard<std::recursive_mutex> lock(mMountsLock);
diff --git a/cmds/installd/InstalldNativeService.h b/cmds/installd/InstalldNativeService.h
index ef91bf84be..432c2867ec 100644
--- a/cmds/installd/InstalldNativeService.h
+++ b/cmds/installd/InstalldNativeService.h
@@ -146,6 +146,8 @@ public:
binder::Status invalidateMounts();
binder::Status isQuotaSupported(const std::unique_ptr<std::string>& volumeUuid,
bool* _aidl_return);
+ binder::Status onPrivateVolumeMounted(const std::unique_ptr<std::string>& volumeUuid);
+ binder::Status onPrivateVolumeRemoved(const std::unique_ptr<std::string>& volumeUuid);
binder::Status prepareAppProfile(const std::string& packageName,
int32_t userId, int32_t appId, const std::string& profileName,
diff --git a/cmds/installd/QuotaUtils.cpp b/cmds/installd/QuotaUtils.cpp
index b238dd36e3..a71e01c943 100644
--- a/cmds/installd/QuotaUtils.cpp
+++ b/cmds/installd/QuotaUtils.cpp
@@ -61,6 +61,10 @@ bool InvalidateQuotaMounts() {
std::getline(in, target, ' ');
std::getline(in, ignored);
+ if (target.compare(0, 13, "/data_mirror/") == 0) {
+ continue;
+ }
+
if (source.compare(0, 11, "/dev/block/") == 0) {
struct dqblk dq;
if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), source.c_str(), 0,
diff --git a/cmds/installd/binder/android/os/IInstalld.aidl b/cmds/installd/binder/android/os/IInstalld.aidl
index 6cc4bde2f1..fda6559bcb 100644
--- a/cmds/installd/binder/android/os/IInstalld.aidl
+++ b/cmds/installd/binder/android/os/IInstalld.aidl
@@ -109,6 +109,8 @@ interface IInstalld {
int appId, @utf8InCpp String seInfo, int user, int snapshotId, int storageflags);
void destroyAppDataSnapshot(@nullable @utf8InCpp String uuid, @utf8InCpp String packageName,
int userId, long ceSnapshotInode, int snapshotId, int storageFlags);
+ void onPrivateVolumeMounted(@nullable @utf8InCpp String volumeUuid);
+ void onPrivateVolumeRemoved(@nullable @utf8InCpp String volumeUuid);
void migrateLegacyObbData();
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-10-20 17:52:38 +0000