5 files changed, 49 insertions, 4 deletions

diff --git a/src/core/file_sys/control_metadata.cpp b/src/core/file_sys/control_metadata.cpp
index f155a1341..63cd2eead 100644
--- a/src/core/file_sys/control_metadata.cpp
+++ b/src/core/file_sys/control_metadata.cpp
@@ -95,6 +95,10 @@ u32 NACP::GetSupportedLanguages() const {
     return raw.supported_languages;
 }
 
+u64 NACP::GetDeviceSaveDataSize() const {
+    return raw.device_save_data_size;
+}
+
 std::vector<u8> NACP::GetRawBytes() const {
     std::vector<u8> out(sizeof(RawNACP));
     std::memcpy(out.data(), &raw, sizeof(RawNACP));
diff --git a/src/core/file_sys/control_metadata.h b/src/core/file_sys/control_metadata.h
index 2d8c251ac..e37b2fadf 100644
--- a/src/core/file_sys/control_metadata.h
+++ b/src/core/file_sys/control_metadata.h
@@ -113,6 +113,7 @@ public:
     u32 GetSupportedLanguages() const;
     std::vector<u8> GetRawBytes() const;
     bool GetUserAccountSwitchLock() const;
+    u64 GetDeviceSaveDataSize() const;
 
 private:
     RawNACP raw{};
diff --git a/src/core/file_sys/savedata_factory.cpp b/src/core/file_sys/savedata_factory.cpp
index f3def93ab..adfd2c1a4 100644
--- a/src/core/file_sys/savedata_factory.cpp
+++ b/src/core/file_sys/savedata_factory.cpp
@@ -57,7 +57,8 @@ void PrintSaveDataDescriptorWarnings(SaveDataDescriptor meta) {
 bool ShouldSaveDataBeAutomaticallyCreated(SaveDataSpaceId space, const SaveDataDescriptor& desc) {
     return desc.type == SaveDataType::CacheStorage || desc.type == SaveDataType::TemporaryStorage ||
            (space == SaveDataSpaceId::NandUser && ///< Normal Save Data -- Current Title & User
-            desc.type == SaveDataType::SaveData && desc.title_id == 0 && desc.save_id == 0);
+            (desc.type == SaveDataType::SaveData || desc.type == SaveDataType::DeviceSaveData) &&
+            desc.title_id == 0 && desc.save_id == 0);
 }
 
 } // Anonymous namespace
@@ -139,8 +140,10 @@ std::string SaveDataFactory::GetFullPath(SaveDataSpaceId space, SaveDataType typ
                                          u128 user_id, u64 save_id) {
     // According to switchbrew, if a save is of type SaveData and the title id field is 0, it should
     // be interpreted as the title id of the current process.
-    if (type == SaveDataType::SaveData && title_id == 0) {
-        title_id = Core::System::GetInstance().CurrentProcess()->GetTitleID();
+    if (type == SaveDataType::SaveData || type == SaveDataType::DeviceSaveData) {
+        if (title_id == 0) {
+            title_id = Core::System::GetInstance().CurrentProcess()->GetTitleID();
+        }
     }
 
     std::string out = GetSaveDataSpaceIdPath(space);
diff --git a/src/core/hle/service/filesystem/fsp_srv.cpp b/src/core/hle/service/filesystem/fsp_srv.cpp
index f6503fe2f..20c331b77 100644
--- a/src/core/hle/service/filesystem/fsp_srv.cpp
+++ b/src/core/hle/service/filesystem/fsp_srv.cpp
@@ -767,7 +767,7 @@ FSP_SRV::FSP_SRV(FileSystemController& fsc, const Core::Reporter& reporter)
         {1014, nullptr, "OutputMultiProgramTagAccessLog"},
         {1100, nullptr, "OverrideSaveDataTransferTokenSignVerificationKey"},
         {1110, nullptr, "CorruptSaveDataFileSystemBySaveDataSpaceId2"},
-        {1200, nullptr, "OpenMultiCommitManager"},
+        {1200, &FSP_SRV::OpenMultiCommitManager, "OpenMultiCommitManager"},
         {1300, nullptr, "OpenBisWiper"},
     };
     // clang-format on
@@ -988,4 +988,40 @@ void FSP_SRV::GetAccessLogVersionInfo(Kernel::HLERequestContext& ctx) {
     rb.Push(access_log_program_index);
 }
 
+class IMultiCommitManager final : public ServiceFramework<IMultiCommitManager> {
+public:
+    explicit IMultiCommitManager() : ServiceFramework("IMultiCommitManager") {
+        static const FunctionInfo functions[] = {
+            {1, &IMultiCommitManager::Add, "Add"},
+            {2, &IMultiCommitManager::Commit, "Commit"},
+        };
+        RegisterHandlers(functions);
+    }
+
+private:
+    FileSys::VirtualFile backend;
+
+    void Add(Kernel::HLERequestContext& ctx) {
+        LOG_WARNING(Service_FS, "(STUBBED) called");
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    void Commit(Kernel::HLERequestContext& ctx) {
+        LOG_WARNING(Service_FS, "(STUBBED) called");
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+};
+
+void FSP_SRV::OpenMultiCommitManager(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_FS, "called");
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IMultiCommitManager>(std::make_shared<IMultiCommitManager>());
+}
+
 } // namespace Service::FileSystem
diff --git a/src/core/hle/service/filesystem/fsp_srv.h b/src/core/hle/service/filesystem/fsp_srv.h
index d52b55999..dfb3e395b 100644
--- a/src/core/hle/service/filesystem/fsp_srv.h
+++ b/src/core/hle/service/filesystem/fsp_srv.h
@@ -50,6 +50,7 @@ private:
     void OpenPatchDataStorageByCurrentProcess(Kernel::HLERequestContext& ctx);
     void OutputAccessLogToSdCard(Kernel::HLERequestContext& ctx);
     void GetAccessLogVersionInfo(Kernel::HLERequestContext& ctx);
+    void OpenMultiCommitManager(Kernel::HLERequestContext& ctx);
 
     FileSystemController& fsc;