1 files changed, 108 insertions, 0 deletions
diff --git a/kernel/src/filesystem/inode.cpp b/kernel/src/filesystem/inode.cpp
new file mode 100644
index 0000000..af73662
--- /dev/null
+++ b/kernel/src/filesystem/inode.cpp
@@ -0,0 +1,108 @@
+#include "kernel/filesystem/inode.hpp"
+
+#include "kapi/system.hpp"
+
+#include "kernel/devices/device.hpp"
+#include "kernel/filesystem/inode_metadata.hpp"
+
+#include <kstd/memory>
+
+#include <cstddef>
+
+namespace filesystem
+{
+  inode::inode(inode_kind kind)
+      : m_kind(kind)
+  {}
+
+  inode::inode(kstd::shared_ptr<devices::device> const & device)
+      : m_kind(inode_kind::device)
+      , m_device(device)
+  {
+    if (!m_device)
+    {
+      kapi::system::panic("[FILESYSTEM] inode constructed with null device.");
+    }
+  }
+
+  auto inode::metadata() const -> inode_metadata
+  {
+    auto meta = inode_metadata{};
+    meta.kind = m_kind;
+
+    if (is_device())
+    {
+      meta.major = m_device->major();
+      meta.minor = m_device->minor();
+    }
+
+    return meta;
+  }
+
+  auto inode::is_directory() const -> bool
+  {
+    return m_kind == inode_kind::directory;
+  }
+
+  auto inode::is_regular() const -> bool
+  {
+    return m_kind == inode_kind::regular;
+  }
+
+  auto inode::is_device() const -> bool
+  {
+    return m_kind == inode_kind::device;
+  }
+
+  auto inode::is_block_device() const -> bool
+  {
+    return is_device() && m_device->is_block_device();
+  }
+
+  auto inode::major_device() const -> size_t
+  {
+    if (!is_device())
+    {
+      kapi::system::panic("[FILESYSTEM] inode::major_device called on non-device inode.");
+    }
+
+    return m_device->major();
+  }
+
+  auto inode::minor_device() const -> size_t
+  {
+    if (!is_device())
+    {
+      kapi::system::panic("[FILESYSTEM] inode::minor_device called on non-device inode.");
+    }
+
+    return m_device->minor();
+  }
+
+  auto inode::backing_device() const -> kstd::shared_ptr<devices::device> const &
+  {
+    return m_device;
+  }
+
+  auto inode::read(void * /*buffer*/, size_t /*offset*/, size_t /*size*/) const -> size_t
+  {
+    if (is_device())
+    {
+      kapi::system::panic("[FILESYSTEM] inode::read called on device inode. Open it as a device file first.");
+    }
+
+    // TODO BA-FS26
+    return 0;
+  }
+
+  auto inode::write(void const *, size_t, size_t) -> size_t
+  {
+    if (is_device())
+    {
+      kapi::system::panic("[FILESYSTEM] inode::write called on device inode. Open it as a device file first.");
+    }
+
+    kapi::system::panic("[FILESYSTEM] inode::write is not implemented yet");
+    return 0;
+  }
+}  // namespace filesystem
+\ No newline at end of file