| 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 | |