From 3497cb5be5f9af324a2798eb76a6c17dfdacd78d Mon Sep 17 00:00:00 2001
From: Yurii Zubrytskyi <zyy@google.com>
Date: Fri, 10 Jan 2020 11:54:06 -0800
Subject: [PATCH] Expose new IncFS interface through Vold

CL is a part of multi-repository topic and will be merged
to AOSP

Bug: 146080380
Test: manual

Change-Id: I09b33a34ff1ac7f6e415b7bd090c22e7df24d72d
---
 VoldNativeService.cpp        | 28 ++++++++++++++--------------
 VoldNativeService.h          |  4 ++--
 binder/android/os/IVold.aidl |  4 ++--
 3 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/VoldNativeService.cpp b/VoldNativeService.cpp
index f8ed61c..67bc939 100644
--- a/VoldNativeService.cpp
+++ b/VoldNativeService.cpp
@@ -932,26 +932,26 @@ binder::Status VoldNativeService::resetCheckpoint() {
     return ok();
 }
 
-binder::Status VoldNativeService::incFsVersion(int32_t* _aidl_return) {
-    *_aidl_return = IncFs_Version();
+binder::Status VoldNativeService::incFsEnabled(bool* _aidl_return) {
+    *_aidl_return = IncFs_IsEnabled();
     return ok();
 }
 
 binder::Status VoldNativeService::mountIncFs(
-        const std::string& imagePath, const std::string& targetDir, int32_t flags,
+        const std::string& backingPath, const std::string& targetDir, int32_t flags,
         ::android::os::incremental::IncrementalFileSystemControlParcel* _aidl_return) {
-    auto result = IncFs_Mount(imagePath.c_str(), targetDir.c_str(), flags,
-                              INCFS_DEFAULT_READ_TIMEOUT_MS, 0777);
-    if (result.cmdFd < 0) {
-        return translate(result.cmdFd);
-    }
-    LOG(INFO) << "VoldNativeService::mountIncFs: everything is fine! " << result.cmdFd << "/"
-              << result.logFd;
-    using ParcelFileDescriptor = ::android::os::ParcelFileDescriptor;
+    auto result = IncFs_Mount(backingPath.c_str(), targetDir.c_str(),
+                              {.flags = IncFsMountFlags(flags),
+                               .defaultReadTimeoutMs = INCFS_DEFAULT_READ_TIMEOUT_MS,
+                               .readLogBufferPages = 4});
+    if (result.cmd < 0) {
+        return translate(result.cmd);
+    }
     using unique_fd = ::android::base::unique_fd;
-    _aidl_return->cmd = std::make_unique<ParcelFileDescriptor>(unique_fd(result.cmdFd));
-    if (result.logFd >= 0) {
-        _aidl_return->log = std::make_unique<ParcelFileDescriptor>(unique_fd(result.logFd));
+    _aidl_return->cmd.reset(unique_fd(result.cmd));
+    _aidl_return->pendingReads.reset(unique_fd(result.pendingReads));
+    if (result.logs >= 0) {
+        _aidl_return->log.reset(unique_fd(result.logs));
     }
     return ok();
 }
diff --git a/VoldNativeService.h b/VoldNativeService.h
index 2967fae..7de2a67 100644
--- a/VoldNativeService.h
+++ b/VoldNativeService.h
@@ -146,9 +146,9 @@ class VoldNativeService : public BinderService<VoldNativeService>, public os::Bn
     binder::Status supportsFileCheckpoint(bool* _aidl_return);
     binder::Status resetCheckpoint();
 
-    binder::Status incFsVersion(int32_t* _aidl_return) override;
+    binder::Status incFsEnabled(bool* _aidl_return) override;
     binder::Status mountIncFs(
-            const std::string& imagePath, const std::string& targetDir, int32_t flags,
+            const std::string& backingPath, const std::string& targetDir, int32_t flags,
             ::android::os::incremental::IncrementalFileSystemControlParcel* _aidl_return) override;
     binder::Status unmountIncFs(const std::string& dir) override;
     binder::Status bindMount(const std::string& sourceDir, const std::string& targetDir) override;
diff --git a/binder/android/os/IVold.aidl b/binder/android/os/IVold.aidl
index 1819e09..f1e463a 100644
--- a/binder/android/os/IVold.aidl
+++ b/binder/android/os/IVold.aidl
@@ -130,8 +130,8 @@ interface IVold {
 
     FileDescriptor openAppFuseFile(int uid, int mountId, int fileId, int flags);
 
-    int incFsVersion();
-    IncrementalFileSystemControlParcel mountIncFs(@utf8InCpp String imagePath, @utf8InCpp String targetDir, int flags);
+    boolean incFsEnabled();
+    IncrementalFileSystemControlParcel mountIncFs(@utf8InCpp String backingPath, @utf8InCpp String targetDir, int flags);
     void unmountIncFs(@utf8InCpp String dir);
     void bindMount(@utf8InCpp String sourceDir, @utf8InCpp String targetDir);