1 files changed, 72 insertions, 0 deletions
diff --git a/kernel/src/filesystem/ext2/filesystem.cpp b/kernel/src/filesystem/ext2/filesystem.cpp
new file mode 100644
index 0000000..d951158
--- /dev/null
+++ b/kernel/src/filesystem/ext2/filesystem.cpp
@@ -0,0 +1,72 @@
+#include "kernel/filesystem/ext2/filesystem.hpp"
+
+#include "kernel/devices/block_device_utils.hpp"
+#include "kernel/devices/device.hpp"
+#include "kernel/filesystem/ext2/inode.hpp"
+#include "kernel/filesystem/ext2/superblock.hpp"
+#include "kernel/filesystem/filesystem.hpp"
+#include "kernel/filesystem/inode.hpp"
+
+#include <kstd/memory>
+
+#include <cstddef>
+#include <cstdint>
+#include <string_view>
+
+namespace kernel::filesystem::ext2
+{
+  namespace
+  {
+    // constexpr size_t SUPERBLOCK_OFFSET = 1024;
+    // constexpr uint16_t EXT2_MAGIC = 0xEF53;
+
+    // // Mode bits
+    // constexpr uint16_t S_IFMT = 0xF000;
+    // constexpr uint16_t S_IFREG = 0x8000;
+    // constexpr uint16_t S_IFDIR = 0x4000;
+
+    // auto S_ISREG(uint16_t mode) -> bool
+    // {
+    //   return (mode & S_IFMT) == S_IFREG;
+    // }
+    // auto S_ISDIR(uint16_t mode) -> bool
+    // {
+    //   return (mode & S_IFMT) == S_IFDIR;
+    // }
+
+    // auto get_block_size(superblock const & superblock) -> size_t
+    // {
+    //   return 1024U << superblock.log_block_size;
+    // }
+
+    // auto get_inode_size(superblock const & superblock) -> size_t
+    // {
+    //   return superblock.rev_level == 0 ? 128 : superblock.inode_size;
+    // }
+  }  // namespace
+
+  auto filesystem::mount(kstd::shared_ptr<devices::device> const & device) -> int
+  {
+    kernel::filesystem::filesystem::mount(device);  // TODO BA-FS26 error handling?
+    // TODO BA-FS26 load proper root inode from ext2 metadata
+    // m_root_inode = inode{inode_kind::directory};
+
+    // TODO BA-FS26 implement
+    m_root_inode = kstd::make_shared<inode>();
+    // devices::block_device_utils::read(device, nullptr, 0, 0);  // TODO BA-FS26 just for testing
+    return 0;
+  }
+
+  auto filesystem::lookup(kstd::shared_ptr<kernel::filesystem::inode> const & /*parent*/, std::string_view name)
+      -> kstd::shared_ptr<kernel::filesystem::inode>
+  {
+    // TODO BA-FS26 implement ext2 directory traversal and inode loading
+    if (name == "dev")
+    {
+      // TODO BA-FS26 just for testing
+      return nullptr;
+    }
+
+    return kstd::make_shared<inode>();
+  }
+}  // namespace kernel::filesystem::ext2