1 /* $NetBSD: vfs_syscalls_50.c,v 1.26 2021/08/15 07:57:46 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
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 #include <sys/cdefs.h>
32 __KERNEL_RCSID(0, "$NetBSD: vfs_syscalls_50.c,v 1.26 2021/08/15 07:57:46 christos Exp $");
33
34 #if defined(_KERNEL_OPT)
35 #include "opt_compat_netbsd.h"
36 #include "opt_quota.h"
37 #endif
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/namei.h>
42 #include <sys/filedesc.h>
43 #include <sys/kernel.h>
44 #include <sys/file.h>
45 #include <sys/stat.h>
46 #include <sys/socketvar.h>
47 #include <sys/vnode.h>
48 #include <sys/mount.h>
49 #include <sys/proc.h>
50 #include <sys/uio.h>
51 #include <sys/dirent.h>
52 #include <sys/kauth.h>
53 #include <sys/time.h>
54 #include <sys/syscall.h>
55 #include <sys/syscallvar.h>
56 #include <sys/syscallargs.h>
57 #include <sys/vfs_syscalls.h>
58 #ifndef LFS
59 #define LFS
60 #endif
61 #include <sys/syscallargs.h>
62
63 #include <ufs/lfs/lfs_extern.h>
64
65 #include <compat/common/compat_util.h>
66 #include <compat/common/compat_mod.h>
67 #include <compat/sys/time.h>
68 #include <compat/sys/stat.h>
69 #include <compat/sys/dirent.h>
70 #include <compat/sys/mount.h>
71
72 static const struct syscall_package vfs_syscalls_50_syscalls[] = {
73 { SYS_compat_50___stat30, 0, (sy_call_t *)compat_50_sys___stat30 },
74 { SYS_compat_50___fstat30, 0, (sy_call_t *)compat_50_sys___fstat30 },
75 { SYS_compat_50___lstat30, 0, (sy_call_t *)compat_50_sys___lstat30 },
76 { SYS_compat_50___fhstat40, 0, (sy_call_t *)compat_50_sys___fhstat40 },
77 { SYS_compat_50_utimes, 0, (sy_call_t *)compat_50_sys_utimes },
78 { SYS_compat_50_lfs_segwait, 0,
79 (sy_call_t *)compat_50_sys_lfs_segwait } ,
80 { SYS_compat_50_futimes, 0, (sy_call_t *)compat_50_sys_futimes },
81 { SYS_compat_50_lutimes, 0, (sy_call_t *)compat_50_sys_lutimes },
82 { SYS_compat_50_mknod, 0, (sy_call_t *)compat_50_sys_mknod },
83 { 0, 0, NULL }
84 };
85
86 /*
87 * Convert from a new to an old stat structure.
88 */
89 static void
cvtstat(struct stat30 * ost,const struct stat * st)90 cvtstat(struct stat30 *ost, const struct stat *st)
91 {
92
93 /* Handle any padding. */
94 memset(ost, 0, sizeof(*ost));
95 ost->st_dev = st->st_dev;
96 ost->st_ino = st->st_ino;
97 ost->st_mode = st->st_mode;
98 ost->st_nlink = st->st_nlink;
99 ost->st_uid = st->st_uid;
100 ost->st_gid = st->st_gid;
101 ost->st_rdev = st->st_rdev;
102 timespec_to_timespec50(&st->st_atimespec, &ost->st_atimespec);
103 timespec_to_timespec50(&st->st_mtimespec, &ost->st_mtimespec);
104 timespec_to_timespec50(&st->st_ctimespec, &ost->st_ctimespec);
105 timespec_to_timespec50(&st->st_birthtimespec, &ost->st_birthtimespec);
106 ost->st_size = st->st_size;
107 ost->st_blocks = st->st_blocks;
108 ost->st_blksize = st->st_blksize;
109 ost->st_flags = st->st_flags;
110 ost->st_gen = st->st_gen;
111 memset(ost->st_spare, 0, sizeof(ost->st_spare));
112 }
113
114 /*
115 * Get file status; this version follows links.
116 */
117 /* ARGSUSED */
118 int
compat_50_sys___stat30(struct lwp * l,const struct compat_50_sys___stat30_args * uap,register_t * retval)119 compat_50_sys___stat30(struct lwp *l, const struct compat_50_sys___stat30_args *uap, register_t *retval)
120 {
121 /* {
122 syscallarg(const char *) path;
123 syscallarg(struct stat30 *) ub;
124 } */
125 struct stat sb;
126 struct stat30 osb;
127 int error;
128
129 error = do_sys_stat(SCARG(uap, path), FOLLOW, &sb);
130 if (error)
131 return error;
132 cvtstat(&osb, &sb);
133 return copyout(&osb, SCARG(uap, ub), sizeof(osb));
134 }
135
136
137 /*
138 * Get file status; this version does not follow links.
139 */
140 /* ARGSUSED */
141 int
compat_50_sys___lstat30(struct lwp * l,const struct compat_50_sys___lstat30_args * uap,register_t * retval)142 compat_50_sys___lstat30(struct lwp *l, const struct compat_50_sys___lstat30_args *uap, register_t *retval)
143 {
144 /* {
145 syscallarg(const char *) path;
146 syscallarg(struct stat30 *) ub;
147 } */
148 struct stat sb;
149 struct stat30 osb;
150 int error;
151
152 error = do_sys_stat(SCARG(uap, path), NOFOLLOW, &sb);
153 if (error)
154 return error;
155 cvtstat(&osb, &sb);
156 return copyout(&osb, SCARG(uap, ub), sizeof(osb));
157 }
158
159 /*
160 * Return status information about a file descriptor.
161 */
162 /* ARGSUSED */
163 int
compat_50_sys___fstat30(struct lwp * l,const struct compat_50_sys___fstat30_args * uap,register_t * retval)164 compat_50_sys___fstat30(struct lwp *l, const struct compat_50_sys___fstat30_args *uap, register_t *retval)
165 {
166 /* {
167 syscallarg(int) fd;
168 syscallarg(struct stat30 *) sb;
169 } */
170 struct stat sb;
171 struct stat30 osb;
172 int error;
173
174 error = do_sys_fstat(SCARG(uap, fd), &sb);
175 if (error)
176 return error;
177 cvtstat(&osb, &sb);
178 return copyout(&osb, SCARG(uap, sb), sizeof(osb));
179 }
180
181 /* ARGSUSED */
182 int
compat_50_sys___fhstat40(struct lwp * l,const struct compat_50_sys___fhstat40_args * uap,register_t * retval)183 compat_50_sys___fhstat40(struct lwp *l, const struct compat_50_sys___fhstat40_args *uap, register_t *retval)
184 {
185 /* {
186 syscallarg(const void *) fhp;
187 syscallarg(size_t) fh_size;
188 syscallarg(struct stat30 *) sb;
189 } */
190 struct stat sb;
191 struct stat30 osb;
192 int error;
193
194 error = do_fhstat(l, SCARG(uap, fhp), SCARG(uap, fh_size), &sb);
195 if (error)
196 return error;
197 cvtstat(&osb, &sb);
198 return copyout(&osb, SCARG(uap, sb), sizeof(osb));
199 }
200
201 static int
compat_50_do_sys_utimes(struct lwp * l,struct vnode * vp,const char * path,int flag,const struct timeval50 * tptr)202 compat_50_do_sys_utimes(struct lwp *l, struct vnode *vp, const char *path,
203 int flag, const struct timeval50 *tptr)
204 {
205 struct timeval tv[2], *tvp;
206 struct timeval50 tv50[2];
207 if (tptr) {
208 int error = copyin(tptr, tv50, sizeof(tv50));
209 if (error)
210 return error;
211 timeval50_to_timeval(&tv50[0], &tv[0]);
212 timeval50_to_timeval(&tv50[1], &tv[1]);
213 tvp = tv;
214 } else
215 tvp = NULL;
216 return do_sys_utimes(l, vp, path, flag, tvp, UIO_SYSSPACE);
217 }
218
219 /*
220 * Set the access and modification times given a path name; this
221 * version follows links.
222 */
223 /* ARGSUSED */
224 int
compat_50_sys_utimes(struct lwp * l,const struct compat_50_sys_utimes_args * uap,register_t * retval)225 compat_50_sys_utimes(struct lwp *l, const struct compat_50_sys_utimes_args *uap,
226 register_t *retval)
227 {
228 /* {
229 syscallarg(const char *) path;
230 syscallarg(const struct timeval50 *) tptr;
231 } */
232
233 return compat_50_do_sys_utimes(l, NULL, SCARG(uap, path), FOLLOW,
234 SCARG(uap, tptr));
235 }
236
237 /*
238 * Set the access and modification times given a file descriptor.
239 */
240 /* ARGSUSED */
241 int
compat_50_sys_futimes(struct lwp * l,const struct compat_50_sys_futimes_args * uap,register_t * retval)242 compat_50_sys_futimes(struct lwp *l,
243 const struct compat_50_sys_futimes_args *uap, register_t *retval)
244 {
245 /* {
246 syscallarg(int) fd;
247 syscallarg(const struct timeval50 *) tptr;
248 } */
249 int error;
250 struct file *fp;
251
252 /* fd_getvnode() will use the descriptor for us */
253 if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0)
254 return error;
255 error = compat_50_do_sys_utimes(l, fp->f_vnode, NULL, 0,
256 SCARG(uap, tptr));
257 fd_putfile(SCARG(uap, fd));
258 return error;
259 }
260
261 /*
262 * Set the access and modification times given a path name; this
263 * version does not follow links.
264 */
265 int
compat_50_sys_lutimes(struct lwp * l,const struct compat_50_sys_lutimes_args * uap,register_t * retval)266 compat_50_sys_lutimes(struct lwp *l,
267 const struct compat_50_sys_lutimes_args *uap, register_t *retval)
268 {
269 /* {
270 syscallarg(const char *) path;
271 syscallarg(const struct timeval50 *) tptr;
272 } */
273
274 return compat_50_do_sys_utimes(l, NULL, SCARG(uap, path), NOFOLLOW,
275 SCARG(uap, tptr));
276 }
277
278 int
compat_50_sys_lfs_segwait(struct lwp * l,const struct compat_50_sys_lfs_segwait_args * uap,register_t * retval)279 compat_50_sys_lfs_segwait(struct lwp *l,
280 const struct compat_50_sys_lfs_segwait_args *uap, register_t *retval)
281 {
282 /* {
283 syscallarg(fsid_t *) fsidp;
284 syscallarg(struct timeval50 *) tv;
285 } */
286 #ifdef notyet
287 /* XXX need to check presence of LFS at run-time XXX */
288 struct timeval atv;
289 struct timeval50 atv50;
290 fsid_t fsid;
291 int error;
292
293 /* XXX need we be su to segwait? */
294 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_LFS,
295 KAUTH_REQ_SYSTEM_LFS_SEGWAIT, NULL, NULL, NULL);
296 if (error)
297 return (error);
298 if ((error = copyin(SCARG(uap, fsidp), &fsid, sizeof(fsid_t))) != 0)
299 return (error);
300
301 if (SCARG(uap, tv)) {
302 error = copyin(SCARG(uap, tv), &atv50, sizeof(atv50));
303 if (error)
304 return (error);
305 timeval50_to_timeval(&atv50, &atv);
306 if (itimerfix(&atv))
307 return (EINVAL);
308 } else /* NULL or invalid */
309 atv.tv_sec = atv.tv_usec = 0;
310 return lfs_segwait(&fsid, &atv);
311 #else
312 return ENOSYS;
313 #endif
314 }
315
316 int
compat_50_sys_mknod(struct lwp * l,const struct compat_50_sys_mknod_args * uap,register_t * retval)317 compat_50_sys_mknod(struct lwp *l,
318 const struct compat_50_sys_mknod_args *uap, register_t *retval)
319 {
320 /* {
321 syscallarg(const char *) path;
322 syscallarg(mode_t) mode;
323 syscallarg(uint32_t) dev;
324 } */
325 return do_sys_mknod(l, SCARG(uap, path), SCARG(uap, mode),
326 SCARG(uap, dev), UIO_USERSPACE);
327 }
328
329 int
vfs_syscalls_50_init(void)330 vfs_syscalls_50_init(void)
331 {
332
333 return syscall_establish(NULL, vfs_syscalls_50_syscalls);
334 }
335
336 int
vfs_syscalls_50_fini(void)337 vfs_syscalls_50_fini(void)
338 {
339
340 return syscall_disestablish(NULL, vfs_syscalls_50_syscalls);
341 }
342