Add VFS, start of initrd
diff --git a/src/kernel/vfs.h b/src/kernel/vfs.h
new file mode 100644
index 0000000..1c62a80
--- /dev/null
+++ b/src/kernel/vfs.h
@@ -0,0 +1,68 @@
+#pragma once
+
+#include "kint.h"
+
+struct fs_vtable;
+
+struct fs_node
+{
+ char name[128]; /* file name */
+ uint inode; /* identifier */
+ uint flags; /* type of node */
+ uint mask; /* permissions */
+ uint gid; /* group id */
+ uint uid; /* user id */
+ size_t size; /* size in bytes */
+ uint dri_res; /* reserved for driver */
+
+ struct fs_vtable *vtable;
+
+ struct fs_node *mount; /* used for mounts */
+};
+
+struct fs_dirent
+{
+ char name[128];
+ uint inode;
+};
+
+typedef uint (* fs_read_t)(struct fs_node *node, size_t offset, size_t size, uchar *buffer);
+typedef uint (* fs_write_t)(struct fs_node *node, size_t offset, size_t size, uchar *buffer);
+typedef void (* fs_open_t)(struct fs_node *node);
+typedef void (* fs_close_t)(struct fs_node *node);
+
+typedef struct fs_dirent *(* fs_readdir_t)(struct fs_node *node, uint index);
+typedef struct fs_node *(* fs_finddir_t)(struct fs_node *node, char *name);
+
+struct fs_vtable
+{
+ fs_read_t read;
+ fs_write_t write;
+ fs_open_t open;
+ fs_close_t close;
+ fs_readdir_t readdir;
+ fs_finddir_t finddir;
+};
+
+enum fs_flags
+{
+ FS_FILE = 1,
+ FS_DIRECTORY,
+ FS_CHARDEVICE,
+ FS_BLOCKDEVICE,
+ FS_PIPE,
+ FS_SYMLINK,
+
+ FS_MOUNT = 8, /* Can be or'd with others */
+};
+
+/* Not to be confused normal open, close, etc functions, these operate
+ * on the VFS directly */
+
+uint fs_read(struct fs_node *node, size_t offset, size_t size, uchar *buffer);
+uint fs_write(struct fs_node *node, size_t offset, size_t size, uchar *buffer);
+void fs_open(struct fs_node *node);
+void fs_close(struct fs_node *node);
+
+struct fs_dirent *fs_readdir(struct fs_node *node, uint index);
+struct fs_node *fs_finddir(struct fs_node *node, char *name);