kernel: some random modifications

kernel/src/fs/vfs.h

@@ -0,0 +1,66 @@
+#pragma once
+
+#include <stdint.h>
+
+struct vfs {
+  struct vfs *vfs_next;           /* next vfs in list */
+  struct vfsops *vfs_op;          /* operations on vfs */
+  struct vnode *vfs_vnodecovered; /* vnode we cover */
+  int vfs_flag;                   /* flags */
+  int vfs_bsize;                  /* native block size */
+  uint64_t vfs_data;               /* private data */
+};
+
+struct vfsops {
+  int (*vfs_mount)();
+  int (*vfs_unmount)();
+  int (*vfs_root)();
+  int (*vfs_statfs)();
+  int (*vfs_sync)();
+  int (*vfs_fid)();
+  int (*vfs_vget)();
+};
+
+enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VBAD };
+struct vnode {
+  uint16_t v_flag;               /* vnode flags */
+  uint16_t v_count;              /* reference count */
+  uint16_t v_shlockc;            /* # of shared locks */
+  uint16_t v_exlockc;            /* # of exclusive locks */
+  struct vfs *v_vfsmountedhere; /* covering vfs */
+  struct vnodeops *v_op;        /* vnode operations */
+  union {
+    struct socket *v_Socket; /* unix ipc */
+    struct stdata *v_Stream; /* stream */
+  };
+  struct vfs *v_vfsp; /* vfs we are in */
+  enum vtype v_type;  /* vnode type */
+  uint64_t v_data;     /* private data */
+};
+
+struct vnodeops {
+  int (*vn_open)();
+  int (*vn_close)();
+  int (*vn_rdwr)();
+  int (*vn_ioctl)();
+  int (*vn_select)();
+  int (*vn_getattr)();
+  int (*vn_setattr)();
+  int (*vn_access)();
+  int (*vn_lookup)();
+  int (*vn_create)();
+  int (*vn_remove)();
+  int (*vn_link)();
+  int (*vn_rename)();
+  int (*vn_mkdir)();
+  int (*vn_rmdir)();
+  int (*vn_readdir)();
+  int (*vn_symlink)();
+  int (*vn_readlink)();
+  int (*vn_fsync)();
+  int (*vn_inactive)();
+  int (*vn_bmap)();
+  int (*vn_strategy)();
+  int (*vn_bread)();
+  int (*vn_brelse)();
+};