1 /* $NetBSD: linux32_stat.c,v 1.18 2021/11/25 02:27:08 ryo Exp $ */
2
3 /*-
4 * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Emmanuel Dreyfus
17 * 4. The name of the author may not be used to endorse or promote
18 * products derived from this software without specific prior written
19 * permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <sys/cdefs.h>
35
36 __KERNEL_RCSID(0, "$NetBSD: linux32_stat.c,v 1.18 2021/11/25 02:27:08 ryo Exp $");
37
38 #include <sys/types.h>
39 #include <sys/param.h>
40 #include <sys/fstypes.h>
41 #include <sys/signal.h>
42 #include <sys/dirent.h>
43 #include <sys/kernel.h>
44 #include <sys/namei.h>
45 #include <sys/fcntl.h>
46 #include <sys/filedesc.h>
47 #include <sys/select.h>
48 #include <sys/proc.h>
49 #include <sys/ucred.h>
50 #include <sys/swap.h>
51 #include <sys/vfs_syscalls.h>
52
53 #include <machine/types.h>
54
55 #include <sys/syscallargs.h>
56
57 #include <compat/netbsd32/netbsd32.h>
58 #include <compat/netbsd32/netbsd32_conv.h>
59 #include <compat/netbsd32/netbsd32_syscallargs.h>
60
61 #include <compat/linux/common/linux_types.h>
62 #include <compat/linux/common/linux_signal.h>
63 #include <compat/linux/common/linux_machdep.h>
64 #include <compat/linux/common/linux_misc.h>
65 #include <compat/linux/common/linux_oldolduname.h>
66 #include <compat/linux/common/linux_ipc.h>
67 #include <compat/linux/common/linux_sem.h>
68 #include <compat/linux/common/linux_fcntl.h>
69 #include <compat/linux/linux_syscallargs.h>
70
71 #include <compat/linux32/common/linux32_types.h>
72 #include <compat/linux32/common/linux32_signal.h>
73 #include <compat/linux32/common/linux32_machdep.h>
74 #include <compat/linux32/common/linux32_sysctl.h>
75 #include <compat/linux32/common/linux32_socketcall.h>
76 #include <compat/linux32/linux32_syscall.h>
77 #include <compat/linux32/linux32_syscallargs.h>
78
79 static inline void bsd_to_linux32_stat(struct stat *, struct linux32_stat *);
80 static inline void bsd_to_linux32_stat64(struct stat *, struct linux32_stat64 *);
81
82 #define linux_fakedev(x,y) (x)
83
84 static inline void
bsd_to_linux32_stat(struct stat * st,struct linux32_stat * st32)85 bsd_to_linux32_stat(struct stat *st, struct linux32_stat *st32)
86 {
87 memset(st32, 0, sizeof(*st32));
88 st32->lst_dev = linux_fakedev(st->st_dev, 0);
89 st32->lst_ino = st->st_ino;
90 st32->lst_mode = st->st_mode;
91 if (st->st_nlink >= (1 << 15))
92 st32->lst_nlink = (1 << 15) - 1;
93 else
94 st32->lst_nlink = st->st_nlink;
95 st32->lst_uid = st->st_uid;
96 st32->lst_gid = st->st_gid;
97 st32->lst_rdev = linux_fakedev(st->st_rdev, 0);
98 st32->lst_size = st->st_size;
99 st32->lst_blksize = st->st_blksize;
100 st32->lst_blocks = st->st_blocks;
101 st32->lst_atime = st->st_atime;
102 st32->lst_mtime = st->st_mtime;
103 st32->lst_ctime = st->st_ctime;
104 #ifdef LINUX32_STAT_HAS_NSEC
105 st32->lst_atime_nsec = st->st_atimensec;
106 st32->lst_mtime_nsec = st->st_mtimensec;
107 st32->lst_ctime_nsec = st->st_ctimensec;
108 #endif
109 }
110
111 static inline void
bsd_to_linux32_stat64(struct stat * st,struct linux32_stat64 * st32)112 bsd_to_linux32_stat64(struct stat *st, struct linux32_stat64 *st32)
113 {
114 memset(st32, 0, sizeof(*st32));
115 st32->lst_dev = linux_fakedev(st->st_dev, 0);
116 st32->lst_ino = st->st_ino;
117 st32->lst_mode = st->st_mode;
118 if (st->st_nlink >= (1 << 15))
119 st32->lst_nlink = (1 << 15) - 1;
120 else
121 st32->lst_nlink = st->st_nlink;
122 st32->lst_uid = st->st_uid;
123 st32->lst_gid = st->st_gid;
124 st32->lst_rdev = linux_fakedev(st->st_rdev, 0);
125 st32->lst_size = st->st_size;
126 st32->lst_blksize = st->st_blksize;
127 st32->lst_blocks = st->st_blocks;
128 st32->lst_atime = st->st_atime;
129 st32->lst_mtime = st->st_mtime;
130 st32->lst_ctime = st->st_ctime;
131 #ifdef LINUX32_STAT64_HAS_NSEC
132 st32->lst_atime_nsec = st->st_atimensec;
133 st32->lst_mtime_nsec = st->st_mtimensec;
134 st32->lst_ctime_nsec = st->st_ctimensec;
135 #endif
136 #ifdef LINUX32_STAT64_HAS_BROKEN_ST_INO
137 st32->__lst_ino = st->st_ino;
138 #endif
139 }
140
141 int
linux32_sys_stat(struct lwp * l,const struct linux32_sys_stat_args * uap,register_t * retval)142 linux32_sys_stat(struct lwp *l, const struct linux32_sys_stat_args *uap, register_t *retval)
143 {
144 /* {
145 syscallarg(netbsd32_charp) path;
146 syscallarg(linux32_statp) sp;
147 } */
148 int error;
149 struct stat st;
150 struct linux32_stat st32;
151
152 error = do_sys_stat(SCARG_P32(uap, path), FOLLOW, &st);
153 if (error != 0)
154 return error;
155
156 bsd_to_linux32_stat(&st, &st32);
157 return copyout(&st32, SCARG_P32(uap, sp), sizeof(st32));
158 }
159
160 int
linux32_sys_lstat(struct lwp * l,const struct linux32_sys_lstat_args * uap,register_t * retval)161 linux32_sys_lstat(struct lwp *l, const struct linux32_sys_lstat_args *uap, register_t *retval)
162 {
163 /* {
164 syscallarg(netbsd32_charp) path;
165 syscallarg(linux32_statp) sp;
166 } */
167 int error;
168 struct stat st;
169 struct linux32_stat st32;
170
171 error = do_sys_stat(SCARG_P32(uap, path), NOFOLLOW, &st);
172 if (error != 0)
173 return error;
174
175 bsd_to_linux32_stat(&st, &st32);
176 return copyout(&st32, SCARG_P32(uap, sp), sizeof(st32));
177 }
178
179 int
linux32_sys_fstat(struct lwp * l,const struct linux32_sys_fstat_args * uap,register_t * retval)180 linux32_sys_fstat(struct lwp *l, const struct linux32_sys_fstat_args *uap, register_t *retval)
181 {
182 /* {
183 syscallarg(int) fd;
184 syscallarg(linux32_statp) sp;
185 } */
186 int error;
187 struct stat st;
188 struct linux32_stat st32;
189
190 error = do_sys_fstat(SCARG(uap, fd), &st);
191 if (error != 0)
192 return error;
193
194 bsd_to_linux32_stat(&st, &st32);
195 return copyout(&st32, SCARG_P32(uap, sp), sizeof(st32));
196 }
197
198 int
linux32_sys_stat64(struct lwp * l,const struct linux32_sys_stat64_args * uap,register_t * retval)199 linux32_sys_stat64(struct lwp *l, const struct linux32_sys_stat64_args *uap, register_t *retval)
200 {
201 /* {
202 syscallarg(netbsd32_charp) path;
203 syscallarg(linux32_stat64p) sp;
204 } */
205 int error;
206 struct stat st;
207 struct linux32_stat64 st32;
208
209 error = do_sys_stat(SCARG_P32(uap, path), FOLLOW, &st);
210 if (error != 0)
211 return error;
212
213 bsd_to_linux32_stat64(&st, &st32);
214 return copyout(&st32, SCARG_P32(uap, sp), sizeof(st32));
215 }
216
217 int
linux32_sys_lstat64(struct lwp * l,const struct linux32_sys_lstat64_args * uap,register_t * retval)218 linux32_sys_lstat64(struct lwp *l, const struct linux32_sys_lstat64_args *uap, register_t *retval)
219 {
220 /* {
221 syscallarg(netbsd32_charp) path;
222 syscallarg(linux32_stat64p) sp;
223 } */
224 int error;
225 struct stat st;
226 struct linux32_stat64 st32;
227
228 error = do_sys_stat(SCARG_P32(uap, path), NOFOLLOW, &st);
229 if (error != 0)
230 return error;
231
232 bsd_to_linux32_stat64(&st, &st32);
233 return copyout(&st32, SCARG_P32(uap, sp), sizeof(st32));
234 }
235
236 int
linux32_sys_fstat64(struct lwp * l,const struct linux32_sys_fstat64_args * uap,register_t * retval)237 linux32_sys_fstat64(struct lwp *l, const struct linux32_sys_fstat64_args *uap, register_t *retval)
238 {
239 /* {
240 syscallarg(int) fd;
241 syscallarg(linux32_stat64p) sp;
242 } */
243 int error;
244 struct stat st;
245 struct linux32_stat64 st32;
246
247 error = do_sys_fstat(SCARG(uap, fd), &st);
248 if (error != 0)
249 return error;
250
251 bsd_to_linux32_stat64(&st, &st32);
252 return copyout(&st32, SCARG_P32(uap, sp), sizeof(st32));
253 }
254
255 int
linux32_sys_fstatat64(struct lwp * l,const struct linux32_sys_fstatat64_args * uap,register_t * retval)256 linux32_sys_fstatat64(struct lwp *l,
257 const struct linux32_sys_fstatat64_args *uap, register_t *retval)
258 {
259 /* {
260 syscallarg(int) fd;
261 syscallarg(netbsd32_charp) path;
262 syscallarg(linux32_stat64p) sp;
263 syscallarg(int) flag;
264 } */
265 struct linux32_stat64 st32;
266 struct stat st;
267 int error;
268
269 error = linux_statat(l, SCARG(uap, fd), SCARG_P32(uap, path),
270 SCARG(uap, flag), &st);
271 if (error != 0)
272 return error;
273
274 bsd_to_linux32_stat64(&st, &st32);
275
276 return copyout(&st32, SCARG_P32(uap, sp), sizeof st32);
277 }
278
279 #ifdef LINUX32_SYS_statx
280 int
linux32_sys_statx(struct lwp * l,const struct linux32_sys_statx_args * uap,register_t * retval)281 linux32_sys_statx(struct lwp *l, const struct linux32_sys_statx_args *uap,
282 register_t *retval)
283 {
284 /* {
285 syscallarg(int) fd;
286 syscallarg(netbsd32_charp) path;
287 syscallarg(int) flag;
288 syscallarg(unsigned int) mask;
289 syscallarg(linux32_statxp) sp;
290 } */
291 struct linux_statx stx;
292 struct stat st;
293 int error;
294
295 error = linux_statat(l, SCARG(uap, fd), SCARG_P32(uap, path),
296 SCARG(uap, flag), &st);
297 if (error != 0)
298 return error;
299
300 /* struct statx has binary compatibilities between 32bit and 64bit */
301 error = bsd_to_linux_statx(&st, &stx, SCARG(uap, mask));
302 if (error != 0)
303 return error;
304
305 return copyout(&stx, SCARG_P32(uap, sp), sizeof stx);
306 }
307 #endif /* LINUX32_SYS_statx */
308