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
69 static int
sysctl_vfs_generic_conf(SYSCTLFN_ARGS)70 sysctl_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 */
104 SYSCTL_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
140 int
compat_sysctl_09_43_init(void)141 compat_sysctl_09_43_init(void)
142 {
143
144 return 0;
145 }
146
147 int
compat_sysctl_09_43_fini(void)148 compat_sysctl_09_43_fini(void)
149 {
150
151 return 0;
152 }
153
154 MODULE (MODULE_CLASS_EXEC, compat_sysctl_09_43, NULL);
155
156 static int
compat_sysctl_09_43_modcmd(modcmd_t cmd,void * arg)157 compat_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