From 72b40ecf33fb0ef2d4232b80560642296c79399c Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Thu, 2 Apr 2026 09:49:17 +0200
Subject: automatically detect the mounted file system type by trial-and-error

---
 kernel/src/filesystem/filesystem.cpp | 29 +++++++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

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

diff --git a/kernel/src/filesystem/filesystem.cpp b/kernel/src/filesystem/filesystem.cpp
index 0ac9cf8..e0c760f 100644
--- a/kernel/src/filesystem/filesystem.cpp
+++ b/kernel/src/filesystem/filesystem.cpp
@@ -1,20 +1,41 @@
 #include "kernel/filesystem/filesystem.hpp"
 
 #include "kapi/devices/device.hpp"
+#include "kapi/system.hpp"
+
+#include "kernel/filesystem/ext2/filesystem.hpp"
 #include "kernel/filesystem/inode.hpp"
 
 #include <kstd/memory>
 
+#include <array>
+
 namespace kernel::filesystem
 {
-  auto filesystem::mount(kstd::shared_ptr<kapi::devices::device> const & device) -> int
+  namespace
+  {
+    constexpr auto static filesystem_factories = std::array{
+      []() { return kstd::make_shared<ext2::filesystem>(); },
+    };
+  }  // namespace
+
+  auto filesystem::mount(kstd::shared_ptr<kapi::devices::device> const & device) -> kstd::shared_ptr<filesystem>
   {
     if (!device)
     {
-      return -1;  // TODO BA-FS26 panic or errorcode?
+      kapi::system::panic("[FILESYSTEM] cannot mount filesystem: device is null.");
     }
-    m_device = device;
-    return 0;
+
+    for (auto & factory : filesystem_factories)
+    {
+      auto fs = factory();
+      if (fs->mount(device) == 0)
+      {
+        return fs;
+      }
+    }
+
+    kapi::system::panic("[FILESYSTEM] cannot mount filesystem: no suitable filesystem found on device.");
   }
 
   auto filesystem::root_inode() const -> kstd::shared_ptr<inode> const &
-- 
cgit v1.2.3


From 1dcf253fdf8169a3b2b71bfac68f2f25951af1a8 Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Thu, 2 Apr 2026 10:04:04 +0200
Subject: fix build, refactoring

---
 kernel/src/filesystem/filesystem.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

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

diff --git a/kernel/src/filesystem/filesystem.cpp b/kernel/src/filesystem/filesystem.cpp
index e0c760f..a06eb80 100644
--- a/kernel/src/filesystem/filesystem.cpp
+++ b/kernel/src/filesystem/filesystem.cpp
@@ -19,7 +19,8 @@ namespace kernel::filesystem
     };
   }  // namespace
 
-  auto filesystem::mount(kstd::shared_ptr<kapi::devices::device> const & device) -> kstd::shared_ptr<filesystem>
+  auto filesystem::probe_and_mount(kstd::shared_ptr<kapi::devices::device> const & device)
+      -> kstd::shared_ptr<filesystem>
   {
     if (!device)
     {
@@ -38,6 +39,12 @@ namespace kernel::filesystem
     kapi::system::panic("[FILESYSTEM] cannot mount filesystem: no suitable filesystem found on device.");
   }
 
+  auto filesystem::mount(kstd::shared_ptr<kapi::devices::device> const & device) -> int
+  {
+    m_device = device;
+    return 0;
+  }
+
   auto filesystem::root_inode() const -> kstd::shared_ptr<inode> const &
   {
     return m_root_inode;
-- 
cgit v1.2.3


From 4a2d4fb3ab38a64c4b10832f5a6318b7240829cc Mon Sep 17 00:00:00 2001
From: Marcel Braun <marcel.braun@ost.ch>
Date: Mon, 6 Apr 2026 11:40:12 +0200
Subject: Implement read data in ext2 inode

---
 kernel/src/filesystem/filesystem.cpp | 5 +++++
 1 file changed, 5 insertions(+)

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

diff --git a/kernel/src/filesystem/filesystem.cpp b/kernel/src/filesystem/filesystem.cpp
index a06eb80..26c57b6 100644
--- a/kernel/src/filesystem/filesystem.cpp
+++ b/kernel/src/filesystem/filesystem.cpp
@@ -49,4 +49,9 @@ namespace kernel::filesystem
   {
     return m_root_inode;
   }
+
+  auto filesystem::device() const -> kstd::shared_ptr<kapi::devices::device> const &
+  {
+    return m_device;
+  }
 }  // namespace kernel::filesystem
\ No newline at end of file
-- 
cgit v1.2.3


From dd330e7a05905713acfa87ec109956bfe78f78c4 Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Wed, 8 Apr 2026 09:31:32 +0200
Subject: add descriptions, some refactoring

---
 kernel/src/filesystem/filesystem.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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

diff --git a/kernel/src/filesystem/filesystem.cpp b/kernel/src/filesystem/filesystem.cpp
index 26c57b6..b08b520 100644
--- a/kernel/src/filesystem/filesystem.cpp
+++ b/kernel/src/filesystem/filesystem.cpp
@@ -36,11 +36,12 @@ namespace kernel::filesystem
       }
     }
 
-    kapi::system::panic("[FILESYSTEM] cannot mount filesystem: no suitable filesystem found on device.");
+    return nullptr;
   }
 
   auto filesystem::mount(kstd::shared_ptr<kapi::devices::device> const & device) -> int
   {
+    // TODO BA-FS26 maybe check if device is null and panic here already?
     m_device = device;
     return 0;
   }
-- 
cgit v1.2.3


From 2793770dc6eba30b73b4a4993618d2cbe184790e Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Wed, 8 Apr 2026 15:21:10 +0200
Subject: implement unmount, improve error codes

---
 kernel/src/filesystem/filesystem.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

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

diff --git a/kernel/src/filesystem/filesystem.cpp b/kernel/src/filesystem/filesystem.cpp
index b08b520..da2838d 100644
--- a/kernel/src/filesystem/filesystem.cpp
+++ b/kernel/src/filesystem/filesystem.cpp
@@ -30,7 +30,7 @@ namespace kernel::filesystem
     for (auto & factory : filesystem_factories)
     {
       auto fs = factory();
-      if (fs->mount(device) == 0)
+      if (fs->mount(device) == operation_result::success)
       {
         return fs;
       }
@@ -39,11 +39,11 @@ namespace kernel::filesystem
     return nullptr;
   }
 
-  auto filesystem::mount(kstd::shared_ptr<kapi::devices::device> const & device) -> int
+  auto filesystem::mount(kstd::shared_ptr<kapi::devices::device> const & device) -> operation_result
   {
     // TODO BA-FS26 maybe check if device is null and panic here already?
     m_device = device;
-    return 0;
+    return operation_result::success;
   }
 
   auto filesystem::root_inode() const -> kstd::shared_ptr<inode> const &
-- 
cgit v1.2.3


From 153d061ddfcc6cb9bff1f691a3fe5415f94a3615 Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Wed, 8 Apr 2026 20:41:49 +0200
Subject: remove todos

---
 kernel/src/filesystem/filesystem.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

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

diff --git a/kernel/src/filesystem/filesystem.cpp b/kernel/src/filesystem/filesystem.cpp
index da2838d..d8b04eb 100644
--- a/kernel/src/filesystem/filesystem.cpp
+++ b/kernel/src/filesystem/filesystem.cpp
@@ -41,7 +41,11 @@ namespace kernel::filesystem
 
   auto filesystem::mount(kstd::shared_ptr<kapi::devices::device> const & device) -> operation_result
   {
-    // TODO BA-FS26 maybe check if device is null and panic here already?
+    if (!device)
+    {
+      kapi::system::panic("[FILESYSTEM] cannot mount filesystem: device is null.");
+    }
+
     m_device = device;
     return operation_result::success;
   }
-- 
cgit v1.2.3