Create vfs.c

Implementation for vfs

kernel/vfs.c

@@ -0,0 +1,19 @@
+#include "vfs.h"
+#include "kmalloc.h"
+#include "string_utils.h"
+
+vfs_node_t* vfs_root = NULL;
+
+uint32_t vfs_read(vfs_node_t* node, uint32_t offset, uint32_t size, uint8_t* buffer) {
+    if (node->read != NULL) {
+        return node->read(node, offset, size, buffer);
+    }
+    return 0;
+}
+
+vfs_node_t* vfs_finddir(vfs_node_t* node, const char* name) {
+    if ((node->flags & VFS_DIRECTORY) && node->finddir != NULL) {
+        return node->finddir(node, name);
+    }
+    return NULL;
+}

kernel/vfs.h

@@ -0,0 +1,42 @@
+#ifndef VFS_H
+#define VFS_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+struct vfs_node;
+
+// Function pointers that every FS driver must provide
+typedef uint32_t (*vfs_read_func)(struct vfs_node*, uint32_t, uint32_t, uint8_t*);
+typedef struct vfs_node* (*vfs_finddir_func)(struct vfs_node*, const char* name);
+
+typedef struct vfs_node {
+    char name[128];
+    uint32_t mask;        // Permissions
+    uint32_t uid;         // User ID
+    uint32_t gid;         // Group ID
+    uint32_t flags;       // Node type (File, Directory, etc.)
+    uint32_t inode;       // FS-specific identifier
+    uint32_t length;      // Size in bytes
+    
+    // Function table
+    vfs_read_func    read;
+    vfs_finddir_func finddir;
+    
+    struct vfs_node* ptr; // Used for mountpoints or symlinks
+} vfs_node_t;
+
+// Standard node types
+#define VFS_FILE        0x01
+#define VFS_DIRECTORY   0x02
+#define VFS_MOUNTPOINT  0x04
+
+// The root of the filesystem (/)
+extern vfs_node_t* vfs_root;
+
+// Public API
+uint32_t vfs_read(vfs_node_t* node, uint32_t offset, uint32_t size, uint8_t* buffer);
+vfs_node_t* vfs_finddir(vfs_node_t* node, const char* name);
+
+#endif