vfs - start making the VFS

kernel/src/fs/vfs.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+struct vnode;
+
+#define VN_FILE 1
+#define VN_DIR  2
+
+typedef uint32_t vnode_type_t;
+
+typedef struct vnode_ops {
+    int (*read)(struct vnode* vn, void* buf, size_t size);
+} vnode_ops_t;
+
+typedef struct vnode {
+    char name[256];
+    vnode_type_t type;
+    struct vnode* parent;
+    struct vnode* child;
+    struct vnode* next;
+
+    struct vnode_ops* ops;
+    void* internal;
+} vnode_t;
+
+typedef struct fs {
+    char name[32];
+    int (*mount)(struct vnode** root);
+} fs_t;
+
+void vfs_init(void);
+int vfs_mount(char *path, fs_t* fs);
+int vfs_unmount(char *path);
+int vfs_open(const char* path, vnode_t** result);
+int vfs_read(vnode_t* vn, void* buf, size_t size);

kernel/src/lib/string.c

@@ -1,4 +1,5 @@
 #include <lib/string.h>
+#include <mm/liballoc/liballoc.h>
 #include <stddef.h>
 
 int strlen(const char *str) {
@@ -16,13 +17,13 @@ int strcmp(const char *s1, const char *s2) {
   return *s1 - *s2;
 }
 
-char *strcpy(char *dest, const char *src)
-{
+char *strcpy(char *dest, const char *src) {
   if (dest == NULL || src == NULL)
     return NULL;
 
   char *temp = dest;
-    while((*dest++ = *src++) != '\0'); 
+  while ((*dest++ = *src++) != '\0')
+    ;
   return temp;
 }
 
@@ -55,3 +56,16 @@ int oct2bin(unsigned char *str, int size) {
   }
   return n;
 }
+
+char *strdup(const char *str) {
+  if (str == NULL)
+    return NULL;
+
+  int len = strlen(str);
+  char *dup = (char *)malloc(len + 1);
+  if (dup == NULL)
+    return NULL;
+
+  strcpy(dup, str);
+  return dup;
+}

kernel/src/lib/string.h

@@ -6,3 +6,4 @@ char *strchr(const char *s, int c);
 char *strcpy(char *dest, const char *src);
 char *strrchr(const char *s, int c);
 int oct2bin(unsigned char *str, int size);
+char *strdup(const char *str);

kernel/src/main.c

@@ -18,11 +18,13 @@
 #include <sys/arch/x86_64/fpu.h>
 #include <sys/arch/x86_64/gdt.h>
 #include <sys/arch/x86_64/idt.h>
-#include <sys/error_handling/panic.h>
+#include <sys/errhnd/panic.h>
 #include <sys/gfx/flanterm/backends/fb.h>
 #include <sys/gfx/flanterm/flanterm.h>
 #include <sys/log.h>
 #include <sys/printf.h>
+#include <fs/vfs.h>
+#include <fs/hellofs.h>
 
 __attribute__((
     used, section(".limine_requests"))) static volatile LIMINE_BASE_REVISION(3);
@@ -89,7 +91,17 @@ void kmain(void) {
   pit_init(1000);
   sched_init();
   
-  panic("No working initialization program found. (This is normal due to Soaplin's current state, so please do not report this as a bug)");
+  vfs_init();
+  if (hellofs_init() < 0) {
+    log("kernel - Failed to initialize HelloFS\n");
+  } else {
+    log("kernel - HelloFS initialized successfully\n");
+  }
+
+  
+
+  panic("No working initialization program found. (This is normal due to "
+        "Soaplin's current state, so please do not report this as a bug)");
 
   log("kernel - Soaplin initialized sucessfully.\n");
 

kernel/src/sys/arch/x86_64/rtc.c

@@ -33,9 +33,11 @@ int rtc_init() {
   write_register(RTC_STATUS, status);
 
   outb(0x70, 0x8B);      // select register B, and disable NMI
-    char prev=inb(0x71);	// read the current value of register B
-    outb(0x70, 0x8B);		// set the index again (a read will reset the index to register D)
-    outb(0x71, prev | 0x40);	// write the previous value ORed with 0x40. This turns on bit 6 of register B
+  char prev = inb(0x71); // read the current value of register B
+  outb(0x70,
+       0x8B); // set the index again (a read will reset the index to register D)
+  outb(0x71, prev | 0x40); // write the previous value ORed with 0x40. This
+                           // turns on bit 6 of register B
   __asm__ volatile("sti");
   return 0;
 }

kernel/src/sys/errhnd/panic.c

@@ -65,7 +65,6 @@ void __panic_display_ascii_art() {
       "halt the PC.\n");
 }
 
-
 void panic(char *msg) {
   __panic_display_ascii_art();