[nce, fs] tico support, fix FS bug that would nuke entire 'switch' folder (#4086)

Contains the minimal set of functionalities to allow tico installer succeed, and tico work normally EXCEPT for game launching (which me or someone else will investigate later)

First three commits are from PR 4012.

The other six, kinda dizzy to explain each one. All were implemented based on tico source, switchbrew and libnx.
Hopefully the commit messages will do.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4086
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: Maufeat <sahyno1996@gmail.com>

src/core/hle/service/ns/application_manager_interface.cpp

@@ -9,6 +9,7 @@
 #include "core/file_sys/registered_cache.h"
 #include "core/hle/service/cmif_serialization.h"
 #include "core/hle/service/filesystem/filesystem.h"
+#include "core/hle/service/ipc_helpers.h"
 #include "core/hle/service/ns/application_manager_interface.h"
 
 #include "core/file_sys/content_archive.h"
@@ -19,6 +20,7 @@
 #include "core/launch_timestamp_cache.h"
 
 #include <algorithm>
+#include <cstring>
 #include <vector>
 
 namespace Service::NS {
@@ -36,14 +38,14 @@ IApplicationManagerInterface::IApplicationManagerInterface(Core::System& system_
         {1, nullptr, "GenerateApplicationRecordCount"},
         {2, D<&IApplicationManagerInterface::GetApplicationRecordUpdateSystemEvent>, "GetApplicationRecordUpdateSystemEvent"},
         {3, nullptr, "GetApplicationViewDeprecated"},
-        {4, nullptr, "DeleteApplicationEntity"},
-        {5, nullptr, "DeleteApplicationCompletely"},
+        {4, D<&IApplicationManagerInterface::DeleteApplicationEntity>, "DeleteApplicationEntity"},
+        {5, D<&IApplicationManagerInterface::DeleteApplicationCompletely>, "DeleteApplicationCompletely"},
         {6, nullptr, "IsAnyApplicationEntityRedundant"},
         {7, nullptr, "DeleteRedundantApplicationEntity"},
         {8, nullptr, "IsApplicationEntityMovable"},
         {9, nullptr, "MoveApplicationEntity"},
         {11, nullptr, "CalculateApplicationOccupiedSize"},
-        {16, nullptr, "PushApplicationRecord"},
+        {16, &IApplicationManagerInterface::PushApplicationRecord, "PushApplicationRecord"},
         {17, nullptr, "ListApplicationRecordContentMeta"},
         {19, nullptr, "LaunchApplicationOld"},
         {21, nullptr, "GetApplicationContentPath"},
@@ -643,6 +645,27 @@ Result IApplicationManagerInterface::IsAnyApplicationEntityInstalled(
     R_SUCCEED();
 }
 
+Result IApplicationManagerInterface::DeleteApplicationEntity(u64 application_id) {
+    LOG_DEBUG(Service_NS, "called, application_id={:016X}", application_id);
+
+    auto& fsc = system.GetFileSystemController();
+    if (auto* const user_cache = fsc.GetUserNANDContents(); user_cache != nullptr) {
+        user_cache->RemoveExistingEntry(application_id);
+        user_cache->Refresh();
+    }
+    if (auto* const sdmc_cache = fsc.GetSDMCContents(); sdmc_cache != nullptr) {
+        sdmc_cache->RemoveExistingEntry(application_id);
+        sdmc_cache->Refresh();
+    }
+
+    record_update_system_event.Signal(system.Kernel());
+    R_SUCCEED();
+}
+
+Result IApplicationManagerInterface::DeleteApplicationCompletely(u64 application_id) {
+    R_RETURN(DeleteApplicationEntity(application_id));
+}
+
 Result IApplicationManagerInterface::GetApplicationViewDeprecated(
     OutArray<ApplicationViewV19, BufferAttr_HipcMapAlias> out_application_views,
     InArray<u64, BufferAttr_HipcMapAlias> application_ids) {
@@ -843,6 +866,29 @@ Result IApplicationManagerInterface::Unknown4053() {
     R_SUCCEED();
 }
 
+void IApplicationManagerInterface::PushApplicationRecord(HLERequestContext& ctx) {
+    const auto record = ctx.ReadBuffer();
+    u64 application_id{};
+    if (record.size() >= sizeof(application_id)) {
+        std::memcpy(&application_id, record.data(), sizeof(application_id));
+    }
+
+    LOG_DEBUG(Service_NS, "called, application_id={:016X}, size={}", application_id, record.size());
+
+    auto& fsc = system.GetFileSystemController();
+    if (auto* const user_cache = fsc.GetUserNANDContents(); user_cache != nullptr) {
+        user_cache->Refresh();
+    }
+    if (auto* const sdmc_cache = fsc.GetSDMCContents(); sdmc_cache != nullptr) {
+        sdmc_cache->Refresh();
+    }
+
+    record_update_system_event.Signal(system.Kernel());
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultSuccess);
+}
+
 void IApplicationManagerInterface::ListApplicationTitle(HLERequestContext& ctx) {
     LOG_DEBUG(Service_NS, "called");
     IReadOnlyApplicationControlDataInterface(system).ListApplicationTitle(ctx);

src/core/hle/service/ns/application_manager_interface.h

@@ -56,6 +56,8 @@ public:
     Result ResumeAll();
     Result IsQualificationTransitionSupportedByProcessId(Out<bool> out_is_supported,
                                                          u64 process_id);
+    Result DeleteApplicationEntity(u64 application_id);
+    Result DeleteApplicationCompletely(u64 application_id);
     Result GetStorageSize(Out<s64> out_total_space_size, Out<s64> out_free_space_size,
                           FileSys::StorageId storage_id);
     Result TouchApplication(u64 application_id);
@@ -74,6 +76,7 @@ public:
     Result RequestDownloadApplicationControlDataInBackground(u64 control_source,
                                                              u64 application_id);
 
+    void PushApplicationRecord(HLERequestContext& ctx);
     void ListApplicationTitle(HLERequestContext& ctx);
 
 private: