From 6d8ae9c708d43ab3d98d6a1f2fbb4e5f74a4a2aa Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Sun, 15 Mar 2026 18:51:26 +0100
Subject: improve constness

---
 kernel/filesystem/include/filesystem/file_descriptor_table.hpp | 2 +-
 kernel/filesystem/include/filesystem/filesystem.hpp            | 2 +-
 kernel/filesystem/include/filesystem/mount.hpp                 | 4 ++--
 kernel/filesystem/include/filesystem/vfs.hpp                   | 2 --
 4 files changed, 4 insertions(+), 6 deletions(-)

(limited to 'kernel/filesystem/include')

diff --git a/kernel/filesystem/include/filesystem/file_descriptor_table.hpp b/kernel/filesystem/include/filesystem/file_descriptor_table.hpp
index 44fd428..3ac03d1 100644
--- a/kernel/filesystem/include/filesystem/file_descriptor_table.hpp
+++ b/kernel/filesystem/include/filesystem/file_descriptor_table.hpp
@@ -16,7 +16,7 @@ namespace filesystem
     ~file_descriptor_table() = default;
 
     auto add_file(open_file_description & f) -> int;
-    auto get_file(int fd) -> std::optional<open_file_description>;
+    [[nodiscard]] auto get_file(int fd) const -> std::optional<open_file_description>;
     auto remove_file(int fd) -> void;
 
   private:
diff --git a/kernel/filesystem/include/filesystem/filesystem.hpp b/kernel/filesystem/include/filesystem/filesystem.hpp
index 113b239..a5a1047 100644
--- a/kernel/filesystem/include/filesystem/filesystem.hpp
+++ b/kernel/filesystem/include/filesystem/filesystem.hpp
@@ -12,7 +12,7 @@ namespace filesystem
 
     virtual auto mount(devices::device * device) -> int = 0;
 
-    auto root_inode() -> inode *;
+    [[nodiscard]] auto root_inode() const -> inode *;
 
   protected:
     inode * m_root_inode{};  // TODO BA-FS26 set during mount?
diff --git a/kernel/filesystem/include/filesystem/mount.hpp b/kernel/filesystem/include/filesystem/mount.hpp
index 793c042..fe5d9cc 100644
--- a/kernel/filesystem/include/filesystem/mount.hpp
+++ b/kernel/filesystem/include/filesystem/mount.hpp
@@ -12,8 +12,8 @@ namespace filesystem
     mount() = default;  // TODO BA-FS26 remove again when kstd::vector is available and used in vfs
     mount(std::string_view const & path, filesystem * fs);
 
-    auto path() const -> std::string_view;
-    auto get_filesystem() const -> filesystem *;
+    [[nodiscard]] auto path() const -> std::string_view;
+    [[nodiscard]] auto get_filesystem() const -> filesystem *;
 
   private:
     std::string_view m_path;
diff --git a/kernel/filesystem/include/filesystem/vfs.hpp b/kernel/filesystem/include/filesystem/vfs.hpp
index 67fd5df..182666d 100644
--- a/kernel/filesystem/include/filesystem/vfs.hpp
+++ b/kernel/filesystem/include/filesystem/vfs.hpp
@@ -6,7 +6,6 @@
 
 #include <array>
 #include <optional>
-#include <string_view>
 
 namespace filesystem
 {
@@ -17,7 +16,6 @@ namespace filesystem
 
     ~vfs() = default;
 
-    // auto do_mount(std::string_view const & path) ->
     auto make_device_node(devices::device * device) -> void;
 
   private:
-- 
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