1 | /* $NetBSD: dead_vfsops.c,v 1.7 2015/07/01 08:13:53 hannken Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2014 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Juergen Hannken-Illjes. |
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 | #include <sys/cdefs.h> |
33 | __KERNEL_RCSID(0, "$NetBSD: dead_vfsops.c,v 1.7 2015/07/01 08:13:53 hannken Exp $" ); |
34 | |
35 | #include <sys/param.h> |
36 | #include <sys/systm.h> |
37 | #include <sys/vnode.h> |
38 | #include <sys/mount.h> |
39 | |
40 | #include <miscfs/specfs/specdev.h> |
41 | |
42 | VFS_PROTOS(dead); |
43 | |
44 | static void dead_panic(void); |
45 | |
46 | extern const struct vnodeopv_desc dead_vnodeop_opv_desc; |
47 | |
48 | static const struct vnodeopv_desc * const dead_vnodeopv_descs[] = { |
49 | &dead_vnodeop_opv_desc, |
50 | NULL |
51 | }; |
52 | |
53 | struct mount *dead_rootmount; |
54 | |
55 | struct vfsops dead_vfsops = { |
56 | .vfs_name = "dead" , |
57 | .vfs_min_mount_data = 0, |
58 | .vfs_mount = (void *)dead_panic, |
59 | .vfs_start = (void *)dead_panic, |
60 | .vfs_unmount = (void *)dead_panic, |
61 | .vfs_root = (void *)dead_panic, |
62 | .vfs_quotactl = (void *)dead_panic, |
63 | .vfs_statvfs = (void *)dead_panic, |
64 | .vfs_sync = (void *)dead_panic, |
65 | .vfs_vget = (void *)dead_panic, |
66 | .vfs_loadvnode = (void *)dead_panic, |
67 | .vfs_newvnode = dead_newvnode, |
68 | .vfs_fhtovp = (void *)dead_panic, |
69 | .vfs_vptofh = (void *)dead_panic, |
70 | .vfs_init = (void *)dead_panic, |
71 | .vfs_reinit = (void *)dead_panic, |
72 | .vfs_done = (void *)dead_panic, |
73 | .vfs_mountroot = (void *)dead_panic, |
74 | .vfs_snapshot = (void *)dead_panic, |
75 | .vfs_extattrctl = (void *)dead_panic, |
76 | .vfs_suspendctl = (void *)dead_panic, |
77 | .vfs_renamelock_enter = (void *)dead_panic, |
78 | .vfs_renamelock_exit = (void *)dead_panic, |
79 | .vfs_fsync = (void *)eopnotsupp, |
80 | .vfs_opv_descs = dead_vnodeopv_descs |
81 | }; |
82 | |
83 | static void |
84 | dead_panic(void) |
85 | { |
86 | |
87 | panic("dead fs operation used" ); |
88 | } |
89 | |
90 | /* |
91 | * Create a new anonymous device vnode. |
92 | */ |
93 | int |
94 | dead_newvnode(struct mount *mp, struct vnode *dvp, struct vnode *vp, |
95 | struct vattr *vap, kauth_cred_t cred, |
96 | size_t *key_len, const void **new_key) |
97 | { |
98 | |
99 | KASSERT(mp == dead_rootmount); |
100 | KASSERT(dvp == NULL); |
101 | KASSERT(vap->va_type == VCHR || vap->va_type == VBLK); |
102 | KASSERT(vap->va_rdev != VNOVAL); |
103 | |
104 | vp->v_tag = VT_NON; |
105 | vp->v_type = vap->va_type; |
106 | vp->v_op = spec_vnodeop_p; |
107 | vp->v_vflag |= VV_MPSAFE; |
108 | uvm_vnp_setsize(vp, 0); |
109 | spec_node_init(vp, vap->va_rdev); |
110 | |
111 | *key_len = sizeof(vp->v_interlock); |
112 | *new_key = &vp->v_interlock; |
113 | |
114 | return 0; |
115 | } |
116 | |