From caf7b99f2d2945f5fd71482d621e9b149b1ef792 Mon Sep 17 00:00:00 2001
From: Emma Nora Theuer <git@entheuer.de>
Date: Tue, 8 Oct 2024 23:01:29 +0200
Subject: [PATCH] Initial Commit

---
 inode.c |  5 +++++
 inode.h | 43 +++++++++++++++++++++++++++++++++++++++++++
 io.h    | 28 ++++++++++++++++++++++++++++
 super.c | 16 ++++++++++++++++
 util.c  |  6 ++++++
 util.h  | 19 +++++++++++++++++++
 6 files changed, 117 insertions(+)
 create mode 100644 inode.c
 create mode 100644 inode.h
 create mode 100644 io.h
 create mode 100644 super.c
 create mode 100644 util.c
 create mode 100644 util.h

diff --git a/inode.c b/inode.c
new file mode 100644
index 0000000..79beaf1
--- /dev/null
+++ b/inode.c
@@ -0,0 +1,5 @@
+#include "inode.h"
+
+tm* get_local_time() {
+    return localtime(&current_time);
+}
diff --git a/inode.h b/inode.h
new file mode 100644
index 0000000..3680897
--- /dev/null
+++ b/inode.h
@@ -0,0 +1,43 @@
+#ifndef INODE_H_
+#define INODE_H_
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include "util.h"
+
+typedef struct Inode Inode;
+typedef struct tm tm;
+
+// Global Variables
+time_t current_time;
+
+// Structs
+struct tm *local_time;
+
+struct Inode {
+    // file information
+    char name[64];
+    uint32_t size;
+
+    // ownership and permissions
+    uint16_t permissions;
+    uint16_t owner;
+    uint16_t group;
+
+    // timestamps
+    tm created;
+    tm last_modified;
+
+    // fs attributes
+    uint32_t index;
+    uint16_t block_count;
+    block* data_block;
+};
+
+tm* get_local_time();
+Inode* create_inode(char name[64], uint16_t owner, uint16_t group, block* data_block);
+Inode* find_inode(char name[]);
+
+#endif // INODE_H_
diff --git a/io.h b/io.h
new file mode 100644
index 0000000..2c35a1f
--- /dev/null
+++ b/io.h
@@ -0,0 +1,28 @@
+#ifndef IO_H_
+#define IO_H_
+
+#define MAX_FDS 1024
+
+#include <stdlib.h>
+#include <sys/types.h>
+
+#include "inode.h"
+
+struct file_descriptor {
+    Inode *inode;
+    off_t offset;
+    int flags;
+    int ref_count;
+};
+
+struct Process {
+    struct file_descriptor fd_table[MAX_FDS];
+};
+
+int allocate_fd(struct Process proc, Inode inode, int flags);
+int emmafs_open(char name[]);
+int emmafs_close(char name[]);
+//int emmafs_read(int fd)
+//int emmafs_write(int fd)
+
+#endif // IO_H_
diff --git a/super.c b/super.c
new file mode 100644
index 0000000..439511f
--- /dev/null
+++ b/super.c
@@ -0,0 +1,16 @@
+#ifndef SUPER_H_
+#define SUPER_H_
+
+#include "inode.h"
+#include "util.h"
+
+// fs attributes
+#define MAGIC 0x7F631EC4
+#define VERSION 0.0.0.1
+#define BLOCKSIZE 4096
+
+uint32_t free_blocks;
+uint32_t inode_count;
+
+
+#endif // SUPER_H_
diff --git a/util.c b/util.c
new file mode 100644
index 0000000..e639112
--- /dev/null
+++ b/util.c
@@ -0,0 +1,6 @@
+#include "util.h"
+
+int find_number_of_inodes(uint64_t fs_size){
+    int number_of_inodes = fs_size / BITS_PER_INODE;
+    return number_of_inodes;
+}
diff --git a/util.h b/util.h
new file mode 100644
index 0000000..6afe680
--- /dev/null
+++ b/util.h
@@ -0,0 +1,19 @@
+#ifndef BLOCK_H_
+#define BLOCK_H_
+
+#include <stdint.h>
+
+#define BLOCKSIZE 4096
+#define BITS_PER_INODE 16384
+
+
+typedef struct block block;
+
+struct block {
+  char data[BLOCKSIZE];
+};
+
+// Provide fs size in bytes
+int find_number_of_inodes(uint64_t fs_size);
+
+#endif // BLOCK_H_