[fs] Add known FileSystemAttribute struct fields (from libhac) (#3275)

Tries to fix cyrillic path issue in Absolum when filesystem tries to commit.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3275
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: Maufeat <sahyno1996@gmail.com>
Co-committed-by: Maufeat <sahyno1996@gmail.com>

src/core/file_sys/fs_filesystem.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -43,17 +46,31 @@ struct FileSystemAttribute {
     u8 file_entry_name_length_max_defined;
     u8 dir_path_name_length_max_defined;
     u8 file_path_name_length_max_defined;
-    INSERT_PADDING_BYTES_NOINIT(0x5);
+
+    u8 utf16_create_dir_path_len_max_defined;
+    u8 utf16_delete_dir_path_len_max_defined;
+    u8 utf16_rename_src_dir_path_len_max_defined;
+    u8 utf16_rename_dest_dir_path_len_max_defined;
+    u8 utf16_open_dir_path_len_max_defined;
+
     u8 utf16_dir_entry_name_length_max_defined;
     u8 utf16_file_entry_name_length_max_defined;
     u8 utf16_dir_path_name_length_max_defined;
     u8 utf16_file_path_name_length_max_defined;
+
     INSERT_PADDING_BYTES_NOINIT(0x18);
+
     s32 dir_entry_name_length_max;
     s32 file_entry_name_length_max;
     s32 dir_path_name_length_max;
     s32 file_path_name_length_max;
-    INSERT_PADDING_WORDS_NOINIT(0x5);
+
+    s32 utf16_create_dir_path_length_max;
+    s32 utf16_delete_dir_path_length_max;
+    s32 utf16_rename_src_dir_path_length_max;
+    s32 utf16_rename_dest_dir_path_length_max;
+    s32 utf16_open_dir_path_length_max;
+
     s32 utf16_dir_entry_name_length_max;
     s32 utf16_file_entry_name_length_max;
     s32 utf16_dir_path_name_length_max;

src/core/hle/service/filesystem/fsp/fs_i_filesystem.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
@@ -163,11 +163,42 @@ Result IFileSystem::GetFileTimeStampRaw(
 Result IFileSystem::GetFileSystemAttribute(Out<FileSys::FileSystemAttribute> out_attribute) {
     LOG_WARNING(Service_FS, "(STUBBED) called");
 
+    constexpr s32 kEntryNameLengthMax = 0x80;
+    constexpr s32 kPathLengthMax = 0x300;
+
     FileSys::FileSystemAttribute savedata_attribute{};
+
     savedata_attribute.dir_entry_name_length_max_defined = true;
     savedata_attribute.file_entry_name_length_max_defined = true;
-    savedata_attribute.dir_entry_name_length_max = 0x40;
-    savedata_attribute.file_entry_name_length_max = 0x40;
+    savedata_attribute.dir_path_name_length_max_defined = true;
+    savedata_attribute.file_path_name_length_max_defined = true;
+
+    savedata_attribute.utf16_create_dir_path_len_max_defined = true;
+    savedata_attribute.utf16_delete_dir_path_len_max_defined = true;
+    savedata_attribute.utf16_rename_src_dir_path_len_max_defined = true;
+    savedata_attribute.utf16_rename_dest_dir_path_len_max_defined = true;
+    savedata_attribute.utf16_open_dir_path_len_max_defined = true;
+
+    savedata_attribute.utf16_dir_entry_name_length_max_defined = true;
+    savedata_attribute.utf16_file_entry_name_length_max_defined = true;
+    savedata_attribute.utf16_dir_path_name_length_max_defined = true;
+    savedata_attribute.utf16_file_path_name_length_max_defined = true;
+
+    savedata_attribute.dir_entry_name_length_max = kEntryNameLengthMax;
+    savedata_attribute.file_entry_name_length_max = kEntryNameLengthMax;
+    savedata_attribute.dir_path_name_length_max = kPathLengthMax;
+    savedata_attribute.file_path_name_length_max = kPathLengthMax;
+
+    savedata_attribute.utf16_create_dir_path_length_max = kPathLengthMax;
+    savedata_attribute.utf16_delete_dir_path_length_max = kPathLengthMax;
+    savedata_attribute.utf16_rename_src_dir_path_length_max = kPathLengthMax;
+    savedata_attribute.utf16_rename_dest_dir_path_length_max = kPathLengthMax;
+    savedata_attribute.utf16_open_dir_path_length_max = kPathLengthMax;
+
+    savedata_attribute.utf16_dir_entry_name_length_max = kEntryNameLengthMax;
+    savedata_attribute.utf16_file_entry_name_length_max = kEntryNameLengthMax;
+    savedata_attribute.utf16_dir_path_name_length_max = kPathLengthMax;
+    savedata_attribute.utf16_file_path_name_length_max = kPathLengthMax;
 
     *out_attribute = savedata_attribute;
     R_SUCCEED();