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 | |
37 | enum 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 | }; |
45 | struct vcache_key { |
46 | struct mount *vk_mount; |
47 | const void *vk_key; |
48 | size_t vk_key_len; |
49 | }; |
50 | struct 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 | }; |
56 | typedef 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 | */ |
64 | const char * |
65 | vstate_name(enum vnode_state); |
66 | vnode_t * |
67 | vnalloc_marker(struct mount *); |
68 | void vnfree_marker(vnode_t *); |
69 | bool vnis_marker(vnode_t *); |
70 | |
71 | #endif /* !_SYS_VNODE_IMPL_H_ */ |
72 | |