1/*	$NetBSD: compat_sysctl_09_43.c,v 1.6 2020/03/26 13:39:29 pgoyette Exp $	*/
2
3/*
4 * Copyright (c) 1989, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	@(#)vfs_syscalls.c	8.28 (Berkeley) 12/10/94
37 */
38
39#include <sys/cdefs.h>
40__KERNEL_RCSID(0, "$NetBSD: compat_sysctl_09_43.c,v 1.6 2020/03/26 13:39:29 pgoyette Exp $");
41
42#if defined(_KERNEL_OPT)
43#include "opt_compat_netbsd.h"
44#endif
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/filedesc.h>
49#include <sys/kernel.h>
50#include <sys/proc.h>
51#include <sys/malloc.h>
52#include <sys/sysctl.h>
53#include <sys/module.h>
54
55#include <sys/mount.h>
56#include <sys/syscall.h>
57#include <sys/syscallvar.h>
58#include <sys/syscallargs.h>
59#include <sys/vfs_syscalls.h>
60
61#include <compat/sys/mount.h>
62#include <compat/common/compat_mod.h>
63
64/*
65 * sysctl helper routine for vfs.generic.conf lookups.
66 */
67#if defined(COMPAT_09) || defined(COMPAT_43) || defined(COMPAT_44)
68
69static int
70sysctl_vfs_generic_conf(SYSCTLFN_ARGS)
71{
72        struct vfsconf vfc;
73	struct sysctlnode node;
74	struct vfsops *vfsp;
75	u_int vfsnum;
76
77	if (namelen != 1)
78		return (ENOTDIR);
79	vfsnum = name[0];
80	if (vfsnum >= nmountcompatnames ||
81	    mountcompatnames[vfsnum] == NULL)
82		return (EOPNOTSUPP);
83	vfsp = vfs_getopsbyname(mountcompatnames[vfsnum]);
84	if (vfsp == NULL)
85		return (EOPNOTSUPP);
86
87	vfc.vfc_vfsops = vfsp;
88	strncpy(vfc.vfc_name, vfsp->vfs_name, sizeof(vfc.vfc_name));
89	vfc.vfc_typenum = vfsnum;
90	vfc.vfc_refcount = vfsp->vfs_refcount;
91	vfc.vfc_flags = 0;
92	vfc.vfc_mountroot = vfsp->vfs_mountroot;
93	vfc.vfc_next = NULL;
94	vfs_delref(vfsp);
95
96	node = *rnode;
97	node.sysctl_data = &vfc;
98	return (sysctl_lookup(SYSCTLFN_CALL(&node)));
99}
100
101/*
102 * Top level filesystem related information gathering.
103 */
104SYSCTL_SETUP(compat_sysctl_vfs, "Top-level filesystem info")
105{
106	int error;
107
108	error = sysctl_createv(clog, 0, NULL, NULL,
109			CTLFLAG_PERMANENT,
110			CTLTYPE_NODE, "generic",
111			SYSCTL_DESCR("Non-specific vfs related information"),
112			NULL, 0, NULL, 0,
113			CTL_VFS, VFS_GENERIC, CTL_EOL);
114	if (error == EEXIST)
115		error = 0;
116	if (error != 0)
117		return;
118
119	error = sysctl_createv(clog, 0, NULL, NULL,
120		       CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE,
121		       CTLTYPE_INT, "maxtypenum",
122		       SYSCTL_DESCR("Highest valid filesystem type number"),
123		       NULL, nmountcompatnames, NULL, 0,
124		       CTL_VFS, VFS_GENERIC, VFS_MAXTYPENUM, CTL_EOL);
125	if (error == EEXIST)
126		error = 0;
127	if (error != 0)
128		return;
129
130	error = sysctl_createv(clog, 0, NULL, NULL,
131		       CTLFLAG_PERMANENT,
132		       CTLTYPE_STRUCT, "conf",
133		       SYSCTL_DESCR("Filesystem configuration information"),
134		       sysctl_vfs_generic_conf, 0, NULL,
135		       sizeof(struct vfsconf),
136		       CTL_VFS, VFS_GENERIC, VFS_CONF, CTL_EOL);
137}
138#endif
139
140int
141compat_sysctl_09_43_init(void)
142{
143
144	return 0;
145}
146
147int
148compat_sysctl_09_43_fini(void)
149{
150
151	return 0;
152}
153
154MODULE (MODULE_CLASS_EXEC, compat_sysctl_09_43, NULL);
155
156static int
157compat_sysctl_09_43_modcmd(modcmd_t cmd, void *arg)
158{
159
160	switch (cmd) {
161	case MODULE_CMD_INIT:
162		return compat_sysctl_09_43_init();
163	case MODULE_CMD_FINI:
164		return compat_sysctl_09_43_fini();
165	default:
166		return ENOTTY;
167	}
168}
169