1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/* $NetBSD: vfs_syscalls_20.c,v 1.46 2020/06/28 14:37:53 christos Exp $ */
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)vfs_syscalls.c 8.42 (Berkeley) 7/31/95
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vfs_syscalls_20.c,v 1.46 2020/06/28 14:37:53 christos Exp $");
#ifdef _KERNEL_OPT
#include "opt_compat_netbsd.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/filedesc.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/dirent.h>
#include <sys/sysctl.h>
#include <sys/syscall.h>
#include <sys/syscallvar.h>
#include <sys/syscallargs.h>
#include <sys/kauth.h>
#include <sys/vfs_syscalls.h>
#include <compat/common/compat_mod.h>
#include <compat/sys/mount.h>
#include <compat/sys/statvfs.h>
static const struct syscall_package vfs_syscalls_20_syscalls[] = {
{ SYS_compat_20_fhstatfs, 0, (sy_call_t *)compat_20_sys_fhstatfs },
{ SYS_compat_20_fstatfs, 0, (sy_call_t *)compat_20_sys_fstatfs },
{ SYS_compat_20_getfsstat, 0, (sy_call_t *)compat_20_sys_getfsstat },
{ SYS_compat_20_statfs, 0, (sy_call_t *)compat_20_sys_statfs },
{ 0, 0, NULL }
};
/*
* Get filesystem statistics.
*/
/* ARGSUSED */
int
compat_20_sys_statfs(struct lwp *l, const struct compat_20_sys_statfs_args *uap, register_t *retval)
{
/* {
syscallarg(const char *) path;
syscallarg(struct statfs12 *) buf;
} */
struct mount *mp;
struct statvfs *sbuf;
int error;
struct vnode *vp;
error = namei_simple_user(SCARG(uap, path),
NSM_FOLLOW_TRYEMULROOT, &vp);
if (error != 0)
return error;
mp = vp->v_mount;
sbuf = STATVFSBUF_GET();
if ((error = dostatvfs(mp, sbuf, l, 0, 1)) != 0)
goto done;
error = statvfs_to_statfs12_copy(sbuf, SCARG(uap, buf), 0);
done:
vrele(vp);
STATVFSBUF_PUT(sbuf);
return error;
}
/*
* Get filesystem statistics.
*/
/* ARGSUSED */
int
compat_20_sys_fstatfs(struct lwp *l, const struct compat_20_sys_fstatfs_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(struct statfs12 *) buf;
} */
struct file *fp;
struct mount *mp;
struct statvfs *sbuf;
int error;
/* fd_getvnode() will use the descriptor for us */
if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0)
return (error);
mp = fp->f_vnode->v_mount;
sbuf = STATVFSBUF_GET();
if ((error = dostatvfs(mp, sbuf, l, 0, 1)) != 0)
goto out;
error = statvfs_to_statfs12_copy(sbuf, SCARG(uap, buf), 0);
out:
fd_putfile(SCARG(uap, fd));
STATVFSBUF_PUT(sbuf);
return error;
}
/*
* Get statistics on all filesystems.
*/
int
compat_20_sys_getfsstat(struct lwp *l, const struct compat_20_sys_getfsstat_args *uap, register_t *retval)
{
/* {
syscallarg(struct statfs12 *) buf;
syscallarg(long) bufsize;
syscallarg(int) flags;
} */
return do_sys_getvfsstat(l, SCARG(uap, buf), SCARG(uap, bufsize),
SCARG(uap, flags), statvfs_to_statfs12_copy,
sizeof(struct statfs12), retval);
}
int
compat_20_sys_fhstatfs(struct lwp *l, const struct compat_20_sys_fhstatfs_args *uap, register_t *retval)
{
/* {
syscallarg(const struct compat_30_fhandle *) fhp;
syscallarg(struct statfs12 *) buf;
} */
struct statvfs *sbuf;
struct compat_30_fhandle fh;
struct mount *mp;
struct vnode *vp;
int error;
/*
* Must be super user
*/
if ((error = kauth_authorize_system(l->l_cred,
KAUTH_SYSTEM_FILEHANDLE, 0, NULL, NULL, NULL)))
return (error);
if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fh))) != 0)
return (error);
if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
return (ESTALE);
error = VFS_FHTOVP(mp, (struct fid*)&fh.fh_fid, LK_EXCLUSIVE, &vp);
if (error != 0)
return (error);
mp = vp->v_mount;
VOP_UNLOCK(vp);
sbuf = STATVFSBUF_GET();
if ((error = VFS_STATVFS(mp, sbuf)) != 0)
goto out;
error = statvfs_to_statfs12_copy(sbuf, SCARG(uap, buf), 0);
out:
vrele(vp);
STATVFSBUF_PUT(sbuf);
return error;
}
int
vfs_syscalls_20_init(void)
{
return syscall_establish(NULL, vfs_syscalls_20_syscalls);
}
int
vfs_syscalls_20_fini(void)
{
return syscall_disestablish(NULL, vfs_syscalls_20_syscalls);
}
|