[victoriafalls] Add InodeTable class to cache Inode info

sys/victoriafalls/fs/ext2/inode_table.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <glacier/container/vector.h>
+#include <stdint.h>
+
+#include "fs/ext2/ext2_block_reader.h"
+
+class InodeTable {
+ public:
+  InodeTable(Ext2BlockReader& driver, BlockGroupDescriptor* bgdt);
+
+  glcr::ErrorOr<Inode*> GetInode(uint64_t inode_num);
+
+ private:
+  Ext2BlockReader& ext2_reader_;
+  BlockGroupDescriptor* bgdt_;
+  uint64_t num_block_groups_;
+  uint64_t inodes_per_group_;
+  uint64_t inode_size_;
+
+  glcr::Vector<MappedMemoryRegion> inode_tables_;
+
+  glcr::ErrorOr<Inode*> GetRootOfInodeTable(uint64_t block_group_num);
+};