1 | /* $NetBSD: tmpfs_specops.c,v 1.12 2014/07/25 08:20:52 dholland Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 2005 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Julio M. Merino Vidal, developed as part of Google's Summer of Code |
9 | * 2005 program. |
10 | * |
11 | * Redistribution and use in source and binary forms, with or without |
12 | * modification, are permitted provided that the following conditions |
13 | * are met: |
14 | * 1. Redistributions of source code must retain the above copyright |
15 | * notice, this list of conditions and the following disclaimer. |
16 | * 2. Redistributions in binary form must reproduce the above copyright |
17 | * notice, this list of conditions and the following disclaimer in the |
18 | * documentation and/or other materials provided with the distribution. |
19 | * |
20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
30 | * POSSIBILITY OF SUCH DAMAGE. |
31 | */ |
32 | |
33 | /* |
34 | * tmpfs vnode interface for special devices. |
35 | */ |
36 | |
37 | #include <sys/cdefs.h> |
38 | __KERNEL_RCSID(0, "$NetBSD: tmpfs_specops.c,v 1.12 2014/07/25 08:20:52 dholland Exp $" ); |
39 | |
40 | #include <sys/param.h> |
41 | #include <sys/vnode.h> |
42 | |
43 | #include <fs/tmpfs/tmpfs.h> |
44 | #include <fs/tmpfs/tmpfs_specops.h> |
45 | |
46 | /* |
47 | * vnode operations vector used for special devices stored in a tmpfs |
48 | * file system. |
49 | */ |
50 | |
51 | int (**tmpfs_specop_p)(void *); |
52 | |
53 | const struct vnodeopv_entry_desc tmpfs_specop_entries[] = { |
54 | { &vop_default_desc, vn_default_error }, |
55 | { &vop_lookup_desc, tmpfs_spec_lookup }, |
56 | { &vop_create_desc, tmpfs_spec_create }, |
57 | { &vop_mknod_desc, tmpfs_spec_mknod }, |
58 | { &vop_open_desc, tmpfs_spec_open }, |
59 | { &vop_close_desc, tmpfs_spec_close }, |
60 | { &vop_access_desc, tmpfs_spec_access }, |
61 | { &vop_getattr_desc, tmpfs_spec_getattr }, |
62 | { &vop_setattr_desc, tmpfs_spec_setattr }, |
63 | { &vop_read_desc, tmpfs_spec_read }, |
64 | { &vop_write_desc, tmpfs_spec_write }, |
65 | { &vop_fallocate_desc, spec_fallocate }, |
66 | { &vop_fdiscard_desc, spec_fdiscard }, |
67 | { &vop_ioctl_desc, tmpfs_spec_ioctl }, |
68 | { &vop_fcntl_desc, tmpfs_spec_fcntl }, |
69 | { &vop_poll_desc, tmpfs_spec_poll }, |
70 | { &vop_kqfilter_desc, tmpfs_spec_kqfilter }, |
71 | { &vop_revoke_desc, tmpfs_spec_revoke }, |
72 | { &vop_mmap_desc, tmpfs_spec_mmap }, |
73 | { &vop_fsync_desc, tmpfs_spec_fsync }, |
74 | { &vop_seek_desc, tmpfs_spec_seek }, |
75 | { &vop_remove_desc, tmpfs_spec_remove }, |
76 | { &vop_link_desc, tmpfs_spec_link }, |
77 | { &vop_rename_desc, tmpfs_spec_rename }, |
78 | { &vop_mkdir_desc, tmpfs_spec_mkdir }, |
79 | { &vop_rmdir_desc, tmpfs_spec_rmdir }, |
80 | { &vop_symlink_desc, tmpfs_spec_symlink }, |
81 | { &vop_readdir_desc, tmpfs_spec_readdir }, |
82 | { &vop_readlink_desc, tmpfs_spec_readlink }, |
83 | { &vop_abortop_desc, tmpfs_spec_abortop }, |
84 | { &vop_inactive_desc, tmpfs_spec_inactive }, |
85 | { &vop_reclaim_desc, tmpfs_spec_reclaim }, |
86 | { &vop_lock_desc, tmpfs_spec_lock }, |
87 | { &vop_unlock_desc, tmpfs_spec_unlock }, |
88 | { &vop_bmap_desc, tmpfs_spec_bmap }, |
89 | { &vop_strategy_desc, tmpfs_spec_strategy }, |
90 | { &vop_print_desc, tmpfs_spec_print }, |
91 | { &vop_pathconf_desc, tmpfs_spec_pathconf }, |
92 | { &vop_islocked_desc, tmpfs_spec_islocked }, |
93 | { &vop_advlock_desc, tmpfs_spec_advlock }, |
94 | { &vop_bwrite_desc, tmpfs_spec_bwrite }, |
95 | { &vop_getpages_desc, tmpfs_spec_getpages }, |
96 | { &vop_putpages_desc, tmpfs_spec_putpages }, |
97 | { NULL, NULL } |
98 | }; |
99 | |
100 | const struct vnodeopv_desc tmpfs_specop_opv_desc = { |
101 | &tmpfs_specop_p, tmpfs_specop_entries |
102 | }; |
103 | |
104 | int |
105 | tmpfs_spec_close(void *v) |
106 | { |
107 | struct vop_close_args /* { |
108 | struct vnode *a_vp; |
109 | int a_fflag; |
110 | kauth_cred_t a_cred; |
111 | } */ *ap __unused = v; |
112 | |
113 | return VOCALL(spec_vnodeop_p, VOFFSET(vop_close), v); |
114 | } |
115 | |
116 | int |
117 | tmpfs_spec_read(void *v) |
118 | { |
119 | struct vop_read_args /* { |
120 | struct vnode *a_vp; |
121 | struct uio *a_uio; |
122 | int a_ioflag; |
123 | kauth_cred_t a_cred; |
124 | } */ *ap = v; |
125 | vnode_t *vp = ap->a_vp; |
126 | |
127 | tmpfs_update(vp, TMPFS_UPDATE_ATIME); |
128 | return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); |
129 | } |
130 | |
131 | int |
132 | tmpfs_spec_write(void *v) |
133 | { |
134 | struct vop_write_args /* { |
135 | struct vnode *a_vp; |
136 | struct uio *a_uio; |
137 | int a_ioflag; |
138 | kauth_cred_t a_cred; |
139 | } */ *ap = v; |
140 | vnode_t *vp = ap->a_vp; |
141 | |
142 | tmpfs_update(vp, TMPFS_UPDATE_MTIME); |
143 | return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); |
144 | } |
145 | |