1/* $NetBSD: vnode_impl.h,v 1.2 2016/11/03 11:04:21 hannken Exp $ */
2
3/*-
4 * Copyright (c) 2016 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _SYS_VNODE_IMPL_H_
33#define _SYS_VNODE_IMPL_H_
34
35#include <sys/vnode.h>
36
37enum vnode_state {
38 VS_MARKER, /* Stable, used as marker. Will not change. */
39 VS_LOADING, /* Intermediate, initialising the fs node. */
40 VS_ACTIVE, /* Stable, valid fs node attached. */
41 VS_BLOCKED, /* Intermediate, active, no new references allowed. */
42 VS_RECLAIMING, /* Intermediate, detaching the fs node. */
43 VS_RECLAIMED /* Stable, no fs node attached. */
44};
45struct vcache_key {
46 struct mount *vk_mount;
47 const void *vk_key;
48 size_t vk_key_len;
49};
50struct vnode_impl {
51 struct vnode vi_vnode;
52 enum vnode_state vi_state;
53 SLIST_ENTRY(vnode_impl) vi_hash;
54 struct vcache_key vi_key;
55};
56typedef struct vnode_impl vnode_impl_t;
57
58#define VIMPL_TO_VNODE(node) ((vnode_t *)(node))
59#define VNODE_TO_VIMPL(vp) ((vnode_impl_t *)(vp))
60
61/*
62 * Vnode manipulation functions.
63 */
64const char *
65 vstate_name(enum vnode_state);
66vnode_t *
67 vnalloc_marker(struct mount *);
68void vnfree_marker(vnode_t *);
69bool vnis_marker(vnode_t *);
70
71#endif /* !_SYS_VNODE_IMPL_H_ */
72