From 5e183b418b0e65dcdffa02a43702a0d6deb43b04 Mon Sep 17 00:00:00 2001
From: Marcel Braun <marcel.braun@ost.ch>
Date: Mon, 13 Apr 2026 21:17:50 +0200
Subject: Back filesystem by inode and not device

---
 kernel/src/filesystem/vfs.cpp | 39 +++++++++++++++++++--------------------
 1 file changed, 19 insertions(+), 20 deletions(-)

(limited to 'kernel/src/filesystem/vfs.cpp')

diff --git a/kernel/src/filesystem/vfs.cpp b/kernel/src/filesystem/vfs.cpp
index 67d1af2..394e926 100644
--- a/kernel/src/filesystem/vfs.cpp
+++ b/kernel/src/filesystem/vfs.cpp
@@ -2,7 +2,6 @@
 
 #include "kapi/system.hpp"
 
-#include "kernel/devices/storage/management.hpp"
 #include "kernel/filesystem/dentry.hpp"
 #include "kernel/filesystem/devfs/filesystem.hpp"
 #include "kernel/filesystem/filesystem.hpp"
@@ -43,19 +42,17 @@ namespace kernel::filesystem
     auto root_fs_root_dentry = kstd::make_shared<dentry>(nullptr, root_fs->root_inode());
     m_mount_table.add_mount(kstd::make_shared<mount>(nullptr, root_fs_root_dentry, root_fs, "", nullptr));
 
-    auto storage_mgmt = devices::storage::management::get();
-    if (auto boot_device = storage_mgmt.determine_boot_device())
+    auto device_fs = kstd::make_shared<devfs::filesystem>();
+    device_fs->mount(nullptr);
+    do_mount_internal("/dev", root_fs_root_dentry, device_fs);
+
+    if (auto boot_device_dentry = resolve_path("/dev/ram0"))  // TODO BA-FS26 better boot device detection
     {
-      auto boot_root_fs = kernel::filesystem::filesystem::probe_and_mount(boot_device);
-      if (boot_root_fs)
+      if (auto boot_root_fs = kernel::filesystem::filesystem::probe_and_mount(boot_device_dentry->get_inode()))
       {
         do_mount_internal("/", root_fs_root_dentry, boot_root_fs);
       }
     }
-
-    auto device_fs = kstd::make_shared<devfs::filesystem>();
-    device_fs->mount(nullptr);
-    do_mount_internal("/dev", root_fs_root_dentry, device_fs);
   }
 
   auto vfs::get() -> vfs &
@@ -78,24 +75,26 @@ namespace kernel::filesystem
     return nullptr;
   }
 
-  auto vfs::do_mount(std::string_view path, kstd::shared_ptr<filesystem> const & filesystem) -> operation_result
+  auto vfs::do_mount(std::string_view source, std::string_view target) -> operation_result
   {
-    if (!filesystem)
-    {
-      return operation_result::filesystem_null;
-    }
-
-    if (path.empty() || path.front() != '/' || (path.size() > 1 && path.back() == '/'))
+    if (target.empty() || target.front() != '/' || (target.size() > 1 && target.back() == '/'))
     {
       return operation_result::invalid_path;
     }
 
-    if (auto mount_point_dentry = resolve_path(path))
+    if (auto mount_point_dentry = resolve_path(target))
     {
-      do_mount_internal(path, mount_point_dentry, filesystem);
-      return operation_result::success;
+      if (auto source_dentry = resolve_path(source))
+      {
+        if (auto fs = kernel::filesystem::filesystem::probe_and_mount(source_dentry->get_inode()))
+        {
+          do_mount_internal(target, mount_point_dentry, fs);
+          return operation_result::success;
+        }
+        return operation_result::invalid_filesystem;
+      }
+      return operation_result::non_existent_path;
     }
-
     return operation_result::mount_point_not_found;
   }
 
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