Add basic structure for ext2_filesystem, filesystem and mount

3 files changed, 65 insertions, 0 deletions

diff --git a/kernel/filesystem/include/filesystem/ext2/ext2_filesystem.hpp b/kernel/filesystem/include/filesystem/ext2/ext2_filesystem.hpp
new file mode 100644
index 0000000..0027475
--- /dev/null
+++ b/kernel/filesystem/include/filesystem/ext2/ext2_filesystem.hpp
@@ -0,0 +1,18 @@
+#ifndef TEACH_OS_KERNEL_FILESYSTEM_EXT2_FILESYSTEM_HPP
+#define TEACH_OS_KERNEL_FILESYSTEM_EXT2_FILESYSTEM_HPP
+
+#include "devices/block_device.hpp"
+#include "filesystem/filesystem.hpp"
+
+namespace filesystem::ext2
+{
+  struct ext2_filesystem : filesystem
+  {
+    auto mount(devices::block_device * block_device) -> int override;
+
+  private:
+    devices::block_device * m_block_device{};
+  };
+}  // namespace filesystem::ext2
+
+#endif
diff --git a/kernel/filesystem/include/filesystem/filesystem.hpp b/kernel/filesystem/include/filesystem/filesystem.hpp
new file mode 100644
index 0000000..d5704c1
--- /dev/null
+++ b/kernel/filesystem/include/filesystem/filesystem.hpp
@@ -0,0 +1,23 @@
+#ifndef TEACH_OS_KERNEL_FILESYSTEM_FILESYSTEM_HPP
+#define TEACH_OS_KERNEL_FILESYSTEM_FILESYSTEM_HPP
+
+#include "devices/block_device.hpp"
+#include "filesystem/inode.hpp"
+
+namespace filesystem
+{
+  struct filesystem
+  {
+    virtual ~filesystem() = default;
+
+    virtual auto mount(devices::block_device * block_device) -> int = 0;
+
+    auto root_inode() -> inode *;
+
+  protected:
+    inode * m_root_inode{};  // TODO BA-FS26 set during mount?
+  };
+
+}  // namespace filesystem
+
+#endif
\ No newline at end of file
diff --git a/kernel/filesystem/include/filesystem/mount.hpp b/kernel/filesystem/include/filesystem/mount.hpp
new file mode 100644
index 0000000..793c042
--- /dev/null
+++ b/kernel/filesystem/include/filesystem/mount.hpp
@@ -0,0 +1,24 @@
+#ifndef TEACH_OS_KERNEL_FILESYSTEM_MOUNT_HPP
+#define TEACH_OS_KERNEL_FILESYSTEM_MOUNT_HPP
+
+#include "filesystem/filesystem.hpp"
+
+#include <string_view>
+
+namespace filesystem
+{
+  struct mount
+  {
+    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 *;
+
+  private:
+    std::string_view m_path;
+    filesystem * m_filesystem{};
+  };
+}  // namespace filesystem
+
+#endif