Merge branch 'develop-BA-FS26' into 'develop'HEADdevelop

Merge of BA-FS26 branch into develop

See merge request teachos/kernel!49

1 files changed, 90 insertions, 0 deletions

diff --git a/kernel/src/filesystem/mount.cpp b/kernel/src/filesystem/mount.cpp
new file mode 100644
index 0000000..ead7479
--- /dev/null
+++ b/kernel/src/filesystem/mount.cpp
@@ -0,0 +1,90 @@
+#include <kernel/filesystem/mount.hpp>
+
+#include <kernel/filesystem/dentry.hpp>
+#include <kernel/filesystem/filesystem.hpp>
+
+#include <kapi/system.hpp>
+
+#include <kstd/memory>
+#include <kstd/string>
+
+#include <cstddef>
+#include <string_view>
+
+namespace kernel::filesystem
+{
+  mount::mount(kstd::shared_ptr<dentry> const & mount_dentry, kstd::shared_ptr<dentry> const & root_dentry,
+               kstd::shared_ptr<filesystem> const & fs, kstd::shared_ptr<mount> const & parent_mount,
+               kstd::shared_ptr<mount> const & source_mount)
+      : m_mount_dentry(mount_dentry)
+      , m_root_dentry(root_dentry)
+      , m_filesystem(fs)
+      , m_parent_mount(parent_mount)
+      , m_source_mount(source_mount)
+      , m_ref_count(0)
+  {
+    if (!m_filesystem)
+    {
+      kapi::system::panic("[FILESYSTEM] mount initialized with null filesystem.");
+    }
+  }
+
+  auto mount::mount_dentry() const -> kstd::shared_ptr<dentry> const &
+  {
+    return m_mount_dentry;
+  }
+
+  auto mount::get_filesystem() const -> kstd::shared_ptr<filesystem> const &
+  {
+    return m_filesystem;
+  }
+
+  auto mount::root_dentry() const -> kstd::shared_ptr<dentry> const &
+  {
+    return m_root_dentry;
+  }
+
+  auto mount::mount_path() const -> kstd::string
+  {
+    if (m_mount_dentry)
+    {
+      return m_mount_dentry->absolute_path();
+    }
+    return "/";
+  }
+
+  auto mount::parent_mount() const -> kstd::shared_ptr<mount> const &
+  {
+    return m_parent_mount;
+  }
+
+  auto mount::source_mount() const -> kstd::shared_ptr<mount>
+  {
+    return m_source_mount.lock();
+  }
+
+  auto mount::increment_ref_count() -> void
+  {
+    m_ref_count += 1;
+  }
+
+  auto mount::decrement_ref_count() -> void
+  {
+    if (m_ref_count == 0)
+    {
+      kapi::system::panic("[FILESYSTEM] decrement_ref_count() was called but ref_count is 0");
+    }
+
+    m_ref_count -= 1;
+  }
+
+  auto mount::is_ready_to_unmount() const -> bool
+  {
+    return m_ref_count == 0;
+  }
+
+  auto mount::ref_count() const -> size_t
+  {
+    return m_ref_count;
+  }
+}  // namespace kernel::filesystem
\ No newline at end of file