diff --git a/include/kernel/dri/fs/ext2/ext2.h b/include/kernel/dri/fs/ext2/ext2.h
index 87191b1..df2b0fe 100644
--- a/include/kernel/dri/fs/ext2/ext2.h
+++ b/include/kernel/dri/fs/ext2/ext2.h
@@ -246,6 +246,18 @@
 	char name[];
 };
 
+enum
+{
+	EXT2_FT_UNKNOWN = 0,
+	EXT2_FT_REGULAR_FILE,
+	EXT2_FT_DIR,
+	EXT2_FT_CHRDEV,
+	EXT2_FT_BLKDEV,
+	EXT2_FT_FIFO,
+	EXT2_FT_SOCK,
+	EXT2_FT_SYMLINK,
+};
+
 /// Read a file system block (0-indexed), if necessary multiple disk blocks
 /// will be read automatically
 void ext2_read_block(struct ext2_superblock *sb, void *buffer, uint block);
@@ -255,7 +267,7 @@
 
 void ext2_write_superblock(struct ext2_superblock *sb);
 
-// Just for fun, corrupt the superblock (obviously don't actually do this)
+/// Just for fun, corrupt the superblock (obviously don't actually do this)
 void ext2_corrupt_superblock_for_fun();
 
 void ext2_mount(struct fs_node *where);
@@ -283,6 +295,10 @@
 						   void *buffer,
 						   uint block);
 
+/// Write a data block for the inode, 0 being the first block of the file.
+bool ext2_write_inode_block(struct ext2_superblock *sb, struct ext2_inode *dir,
+							void *buffer, uint block);
+
 ssize_t ext2_read_inode(struct ext2_superblock *sb, struct ext2_inode *inode, void *buffer, ssize_t size);
 
 /**
@@ -317,4 +333,11 @@
 uint ext2_first_zero_bit(struct ext2_superblock *sb, uint bitmap_block,
 						 uint num_blocks, uint start_at);
 
+/**
+ * Find the first free inode number.
+ * @returns The inode if it was found, 0 if there are no free inodes.
+ */
 uint ext2_first_free_inode(struct ext2_superblock *sb);
+
+void ext2_insert_into_dir(struct ext2_superblock *sb, struct ext2_inode *dir,
+						  char *name, uint name_len, uint inode, uchar type);
diff --git a/include/kernel/kint.h b/include/kernel/kint.h
index 66f22b6..e3e12d7 100644
--- a/include/kernel/kint.h
+++ b/include/kernel/kint.h
@@ -21,5 +21,11 @@
 #define MIN(a, b) ((a)>(b)?(b):(a))
 #define MAX(a, b) ((a)>(b)?(a):(b))
 
+/// Pads num to an integer size boundary
+#define PAD(num) ((num + 3) & (~0b11))
+
+/// Perform integer division and round up
+#define IDIV_CEIL(num, den) (((num) + ((den) - 1)) / (den))
+
 // Coerce into 1 or 0
 #define BOOL(a) (!(!(a)))