1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1994-1995 Søren Schmidt
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/12.0/sys/compat/linux/linux_stats.c 335201 2018-06-15 14:41:51Z emaste $");
31
32 #include "opt_compat.h"
33
34 #include <sys/param.h>
35 #include <sys/capsicum.h>
36 #include <sys/dirent.h>
37 #include <sys/file.h>
38 #include <sys/filedesc.h>
39 #include <sys/proc.h>
40 #include <sys/malloc.h>
41 #include <sys/mount.h>
42 #include <sys/namei.h>
43 #include <sys/stat.h>
44 #include <sys/syscallsubr.h>
45 #include <sys/systm.h>
46 #include <sys/tty.h>
47 #include <sys/vnode.h>
48 #include <sys/conf.h>
49 #include <sys/fcntl.h>
50
51 #ifdef COMPAT_LINUX32
52 #include <machine/../linux32/linux.h>
53 #include <machine/../linux32/linux32_proto.h>
54 #else
55 #include <machine/../linux/linux.h>
56 #include <machine/../linux/linux_proto.h>
57 #endif
58
59 #include <compat/linux/linux_util.h>
60 #include <compat/linux/linux_file.h>
61
62
63 static void
64 translate_vnhook_major_minor(struct vnode *vp, struct stat *sb)
65 {
66 int major, minor;
67
68 if (vp->v_type == VCHR && vp->v_rdev != NULL &&
69 linux_driver_get_major_minor(devtoname(vp->v_rdev),
70 &major, &minor) == 0) {
71 sb->st_rdev = (major << 8 | minor);
72 }
73 }
74
75 static int
76 linux_kern_statat(struct thread *td, int flag, int fd, char *path,
77 enum uio_seg pathseg, struct stat *sbp)
78 {
79
80 return (kern_statat(td, flag, fd, path, pathseg, sbp,
81 translate_vnhook_major_minor));
82 }
83
84 #ifdef LINUX_LEGACY_SYSCALLS
85 static int
86 linux_kern_stat(struct thread *td, char *path, enum uio_seg pathseg,
87 struct stat *sbp)
88 {
89
90 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp));
91 }
92
93 static int
94 linux_kern_lstat(struct thread *td, char *path, enum uio_seg pathseg,
95 struct stat *sbp)
96 {
97
98 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path,
99 pathseg, sbp));
100 }
101 #endif
102
103 static void
104 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf)
105 {
106 struct file *fp;
107 struct vnode *vp;
108 int major, minor;
109
110 /*
111 * No capability rights required here.
112 */
113 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) ||
114 fget(td, fd, &cap_no_rights, &fp) != 0)
115 return;
116 vp = fp->f_vnode;
117 if (vp != NULL && vp->v_rdev != NULL &&
118 linux_driver_get_major_minor(devtoname(vp->v_rdev),
119 &major, &minor) == 0) {
120 buf->st_rdev = (major << 8 | minor);
121 } else if (fp->f_type == DTYPE_PTS) {
122 struct tty *tp = fp->f_data;
123
124 /* Convert the numbers for the slave device. */
125 if (linux_driver_get_major_minor(devtoname(tp->t_dev),
126 &major, &minor) == 0) {
127 buf->st_rdev = (major << 8 | minor);
128 }
129 }
130 fdrop(fp, td);
131 }
132
133 /*
134 * l_dev_t has the same encoding as dev_t in the latter's low 16 bits, so
135 * truncation of a dev_t to 16 bits gives the same result as unpacking
136 * using major() and minor() and repacking in the l_dev_t format. This
137 * detail is hidden in dev_to_ldev(). Overflow in conversions of dev_t's
138 * are not checked for, as for other fields.
139 *
140 * dev_to_ldev() is only used for translating st_dev. When we convert
141 * st_rdev for copying it out, it isn't really a dev_t, but has already
142 * been translated to an l_dev_t in a nontrivial way. Translating it
143 * again would be illogical but would have no effect since the low 16
144 * bits have the same encoding.
145 *
146 * The nontrivial translation for st_rdev renumbers some devices, but not
147 * ones that can be mounted on, so it is consistent with the translation
148 * for st_dev except when the renumbering or truncation causes conflicts.
149 */
150 #define dev_to_ldev(d) ((uint16_t)(d))
151
152 static int
153 newstat_copyout(struct stat *buf, void *ubuf)
154 {
155 struct l_newstat tbuf;
156
157 bzero(&tbuf, sizeof(tbuf));
158 tbuf.st_dev = dev_to_ldev(buf->st_dev);
159 tbuf.st_ino = buf->st_ino;
160 tbuf.st_mode = buf->st_mode;
161 tbuf.st_nlink = buf->st_nlink;
162 tbuf.st_uid = buf->st_uid;
163 tbuf.st_gid = buf->st_gid;
164 tbuf.st_rdev = buf->st_rdev;
165 tbuf.st_size = buf->st_size;
166 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
167 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
168 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
169 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
170 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
171 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
172 tbuf.st_blksize = buf->st_blksize;
173 tbuf.st_blocks = buf->st_blocks;
174
175 return (copyout(&tbuf, ubuf, sizeof(tbuf)));
176 }
177
178 #ifdef LINUX_LEGACY_SYSCALLS
179 int
180 linux_newstat(struct thread *td, struct linux_newstat_args *args)
181 {
182 struct stat buf;
183 char *path;
184 int error;
185
186 LCONVPATHEXIST(td, args->path, &path);
187
188 #ifdef DEBUG
189 if (ldebug(newstat))
190 printf(ARGS(newstat, "%s, *"), path);
191 #endif
192
193 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
194 LFREEPATH(path);
195 if (error)
196 return (error);
197 return (newstat_copyout(&buf, args->buf));
198 }
199
200 int
201 linux_newlstat(struct thread *td, struct linux_newlstat_args *args)
202 {
203 struct stat sb;
204 char *path;
205 int error;
206
207 LCONVPATHEXIST(td, args->path, &path);
208
209 #ifdef DEBUG
210 if (ldebug(newlstat))
211 printf(ARGS(newlstat, "%s, *"), path);
212 #endif
213
214 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb);
215 LFREEPATH(path);
216 if (error)
217 return (error);
218 return (newstat_copyout(&sb, args->buf));
219 }
220 #endif
221
222 int
223 linux_newfstat(struct thread *td, struct linux_newfstat_args *args)
224 {
225 struct stat buf;
226 int error;
227
228 #ifdef DEBUG
229 if (ldebug(newfstat))
230 printf(ARGS(newfstat, "%d, *"), args->fd);
231 #endif
232
233 error = kern_fstat(td, args->fd, &buf);
234 translate_fd_major_minor(td, args->fd, &buf);
235 if (!error)
236 error = newstat_copyout(&buf, args->buf);
237
238 return (error);
239 }
240
241 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
242 static int
243 stat_copyout(struct stat *buf, void *ubuf)
244 {
245 struct l_stat lbuf;
246
247 bzero(&lbuf, sizeof(lbuf));
248 lbuf.st_dev = dev_to_ldev(buf->st_dev);
249 lbuf.st_ino = buf->st_ino;
250 lbuf.st_mode = buf->st_mode;
251 lbuf.st_nlink = buf->st_nlink;
252 lbuf.st_uid = buf->st_uid;
253 lbuf.st_gid = buf->st_gid;
254 lbuf.st_rdev = buf->st_rdev;
255 lbuf.st_size = MIN(buf->st_size, INT32_MAX);
256 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
257 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
258 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
259 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
260 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
261 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
262 lbuf.st_blksize = buf->st_blksize;
263 lbuf.st_blocks = buf->st_blocks;
264 lbuf.st_flags = buf->st_flags;
265 lbuf.st_gen = buf->st_gen;
266
267 return (copyout(&lbuf, ubuf, sizeof(lbuf)));
268 }
269
270 int
271 linux_stat(struct thread *td, struct linux_stat_args *args)
272 {
273 struct stat buf;
274 char *path;
275 int error;
276
277 LCONVPATHEXIST(td, args->path, &path);
278
279 #ifdef DEBUG
280 if (ldebug(stat))
281 printf(ARGS(stat, "%s, *"), path);
282 #endif
283 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
284 if (error) {
285 LFREEPATH(path);
286 return (error);
287 }
288 LFREEPATH(path);
289 return (stat_copyout(&buf, args->up));
290 }
291
292 int
293 linux_lstat(struct thread *td, struct linux_lstat_args *args)
294 {
295 struct stat buf;
296 char *path;
297 int error;
298
299 LCONVPATHEXIST(td, args->path, &path);
300
301 #ifdef DEBUG
302 if (ldebug(lstat))
303 printf(ARGS(lstat, "%s, *"), path);
304 #endif
305 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf);
306 if (error) {
307 LFREEPATH(path);
308 return (error);
309 }
310 LFREEPATH(path);
311 return (stat_copyout(&buf, args->up));
312 }
313 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
314
315 struct l_statfs {
316 l_long f_type;
317 l_long f_bsize;
318 l_long f_blocks;
319 l_long f_bfree;
320 l_long f_bavail;
321 l_long f_files;
322 l_long f_ffree;
323 l_fsid_t f_fsid;
324 l_long f_namelen;
325 l_long f_frsize;
326 l_long f_flags;
327 l_long f_spare[4];
328 };
329
330 #define LINUX_CODA_SUPER_MAGIC 0x73757245L
331 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L
332 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L
333 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L
334 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L
335 #define LINUX_NCP_SUPER_MAGIC 0x564cL
336 #define LINUX_NFS_SUPER_MAGIC 0x6969L
337 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL
338 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L
339 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */
340 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1
341 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L
342 #define LINUX_SHMFS_MAGIC 0x01021994
343
344 static long
345 bsd_to_linux_ftype(const char *fstypename)
346 {
347 int i;
348 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = {
349 {"ufs", LINUX_UFS_SUPER_MAGIC},
350 {"zfs", LINUX_ZFS_SUPER_MAGIC},
351 {"cd9660", LINUX_ISOFS_SUPER_MAGIC},
352 {"nfs", LINUX_NFS_SUPER_MAGIC},
353 {"ext2fs", LINUX_EXT2_SUPER_MAGIC},
354 {"procfs", LINUX_PROC_SUPER_MAGIC},
355 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC},
356 {"ntfs", LINUX_NTFS_SUPER_MAGIC},
357 {"nwfs", LINUX_NCP_SUPER_MAGIC},
358 {"hpfs", LINUX_HPFS_SUPER_MAGIC},
359 {"coda", LINUX_CODA_SUPER_MAGIC},
360 {"devfs", LINUX_DEVFS_SUPER_MAGIC},
361 {"tmpfs", LINUX_SHMFS_MAGIC},
362 {NULL, 0L}};
363
364 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++)
365 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0)
366 return (b2l_tbl[i].linux_type);
367
368 return (0L);
369 }
370
371 static int
372 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs)
373 {
374 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
375 uint64_t tmp;
376
377 #define LINUX_HIBITS 0xffffffff00000000ULL
378
379 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files |
380 bsd_statfs->f_bsize;
381 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) ||
382 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) ||
383 (tmp & LINUX_HIBITS))
384 return (EOVERFLOW);
385 #undef LINUX_HIBITS
386 #endif
387 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
388 linux_statfs->f_bsize = bsd_statfs->f_bsize;
389 linux_statfs->f_blocks = bsd_statfs->f_blocks;
390 linux_statfs->f_bfree = bsd_statfs->f_bfree;
391 linux_statfs->f_bavail = bsd_statfs->f_bavail;
392 linux_statfs->f_ffree = bsd_statfs->f_ffree;
393 linux_statfs->f_files = bsd_statfs->f_files;
394 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
395 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
396 linux_statfs->f_namelen = MAXNAMLEN;
397 linux_statfs->f_frsize = bsd_statfs->f_bsize;
398 linux_statfs->f_flags = 0;
399 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare));
400
401 return (0);
402 }
403
404 int
405 linux_statfs(struct thread *td, struct linux_statfs_args *args)
406 {
407 struct l_statfs linux_statfs;
408 struct statfs *bsd_statfs;
409 char *path;
410 int error;
411
412 LCONVPATHEXIST(td, args->path, &path);
413
414 #ifdef DEBUG
415 if (ldebug(statfs))
416 printf(ARGS(statfs, "%s, *"), path);
417 #endif
418 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
419 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs);
420 LFREEPATH(path);
421 if (error == 0)
422 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs);
423 free(bsd_statfs, M_STATFS);
424 if (error != 0)
425 return (error);
426 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
427 }
428
429 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
430 static void
431 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs)
432 {
433
434 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
435 linux_statfs->f_bsize = bsd_statfs->f_bsize;
436 linux_statfs->f_blocks = bsd_statfs->f_blocks;
437 linux_statfs->f_bfree = bsd_statfs->f_bfree;
438 linux_statfs->f_bavail = bsd_statfs->f_bavail;
439 linux_statfs->f_ffree = bsd_statfs->f_ffree;
440 linux_statfs->f_files = bsd_statfs->f_files;
441 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
442 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
443 linux_statfs->f_namelen = MAXNAMLEN;
444 linux_statfs->f_frsize = bsd_statfs->f_bsize;
445 linux_statfs->f_flags = 0;
446 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare));
447 }
448
449 int
450 linux_statfs64(struct thread *td, struct linux_statfs64_args *args)
451 {
452 struct l_statfs64 linux_statfs;
453 struct statfs *bsd_statfs;
454 char *path;
455 int error;
456
457 if (args->bufsize != sizeof(struct l_statfs64))
458 return (EINVAL);
459
460 LCONVPATHEXIST(td, args->path, &path);
461
462 #ifdef DEBUG
463 if (ldebug(statfs64))
464 printf(ARGS(statfs64, "%s, *"), path);
465 #endif
466 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
467 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs);
468 LFREEPATH(path);
469 if (error == 0)
470 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs);
471 free(bsd_statfs, M_STATFS);
472 if (error != 0)
473 return (error);
474 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
475 }
476
477 int
478 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args)
479 {
480 struct l_statfs64 linux_statfs;
481 struct statfs *bsd_statfs;
482 int error;
483
484 #ifdef DEBUG
485 if (ldebug(fstatfs64))
486 printf(ARGS(fstatfs64, "%d, *"), args->fd);
487 #endif
488 if (args->bufsize != sizeof(struct l_statfs64))
489 return (EINVAL);
490
491 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
492 error = kern_fstatfs(td, args->fd, bsd_statfs);
493 if (error == 0)
494 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs);
495 free(bsd_statfs, M_STATFS);
496 if (error != 0)
497 return (error);
498 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
499 }
500 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
501
502 int
503 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args)
504 {
505 struct l_statfs linux_statfs;
506 struct statfs *bsd_statfs;
507 int error;
508
509 #ifdef DEBUG
510 if (ldebug(fstatfs))
511 printf(ARGS(fstatfs, "%d, *"), args->fd);
512 #endif
513 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
514 error = kern_fstatfs(td, args->fd, bsd_statfs);
515 if (error == 0)
516 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs);
517 free(bsd_statfs, M_STATFS);
518 if (error != 0)
519 return (error);
520 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
521 }
522
523 struct l_ustat
524 {
525 l_daddr_t f_tfree;
526 l_ino_t f_tinode;
527 char f_fname[6];
528 char f_fpack[6];
529 };
530
531 #ifdef LINUX_LEGACY_SYSCALLS
532 int
533 linux_ustat(struct thread *td, struct linux_ustat_args *args)
534 {
535 #ifdef DEBUG
536 if (ldebug(ustat))
537 printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev);
538 #endif
539
540 return (EOPNOTSUPP);
541 }
542 #endif
543
544 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
545
546 static int
547 stat64_copyout(struct stat *buf, void *ubuf)
548 {
549 struct l_stat64 lbuf;
550
551 bzero(&lbuf, sizeof(lbuf));
552 lbuf.st_dev = dev_to_ldev(buf->st_dev);
553 lbuf.st_ino = buf->st_ino;
554 lbuf.st_mode = buf->st_mode;
555 lbuf.st_nlink = buf->st_nlink;
556 lbuf.st_uid = buf->st_uid;
557 lbuf.st_gid = buf->st_gid;
558 lbuf.st_rdev = buf->st_rdev;
559 lbuf.st_size = buf->st_size;
560 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
561 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
562 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
563 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
564 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
565 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
566 lbuf.st_blksize = buf->st_blksize;
567 lbuf.st_blocks = buf->st_blocks;
568
569 /*
570 * The __st_ino field makes all the difference. In the Linux kernel
571 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO,
572 * but without the assignment to __st_ino the runtime linker refuses
573 * to mmap(2) any shared libraries. I guess it's broken alright :-)
574 */
575 lbuf.__st_ino = buf->st_ino;
576
577 return (copyout(&lbuf, ubuf, sizeof(lbuf)));
578 }
579
580 int
581 linux_stat64(struct thread *td, struct linux_stat64_args *args)
582 {
583 struct stat buf;
584 char *filename;
585 int error;
586
587 LCONVPATHEXIST(td, args->filename, &filename);
588
589 #ifdef DEBUG
590 if (ldebug(stat64))
591 printf(ARGS(stat64, "%s, *"), filename);
592 #endif
593
594 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf);
595 LFREEPATH(filename);
596 if (error)
597 return (error);
598 return (stat64_copyout(&buf, args->statbuf));
599 }
600
601 int
602 linux_lstat64(struct thread *td, struct linux_lstat64_args *args)
603 {
604 struct stat sb;
605 char *filename;
606 int error;
607
608 LCONVPATHEXIST(td, args->filename, &filename);
609
610 #ifdef DEBUG
611 if (ldebug(lstat64))
612 printf(ARGS(lstat64, "%s, *"), args->filename);
613 #endif
614
615 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb);
616 LFREEPATH(filename);
617 if (error)
618 return (error);
619 return (stat64_copyout(&sb, args->statbuf));
620 }
621
622 int
623 linux_fstat64(struct thread *td, struct linux_fstat64_args *args)
624 {
625 struct stat buf;
626 int error;
627
628 #ifdef DEBUG
629 if (ldebug(fstat64))
630 printf(ARGS(fstat64, "%d, *"), args->fd);
631 #endif
632
633 error = kern_fstat(td, args->fd, &buf);
634 translate_fd_major_minor(td, args->fd, &buf);
635 if (!error)
636 error = stat64_copyout(&buf, args->statbuf);
637
638 return (error);
639 }
640
641 int
642 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args)
643 {
644 char *path;
645 int error, dfd, flag;
646 struct stat buf;
647
648 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
649 return (EINVAL);
650 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
651 AT_SYMLINK_NOFOLLOW : 0;
652
653 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
654 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
655
656 #ifdef DEBUG
657 if (ldebug(fstatat64))
658 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag);
659 #endif
660
661 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
662 if (!error)
663 error = stat64_copyout(&buf, args->statbuf);
664 LFREEPATH(path);
665
666 return (error);
667 }
668
669 #else /* __amd64__ && !COMPAT_LINUX32 */
670
671 int
672 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args)
673 {
674 char *path;
675 int error, dfd, flag;
676 struct stat buf;
677
678 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
679 return (EINVAL);
680 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
681 AT_SYMLINK_NOFOLLOW : 0;
682
683 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
684 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
685
686 #ifdef DEBUG
687 if (ldebug(newfstatat))
688 printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag);
689 #endif
690
691 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
692 if (error == 0)
693 error = newstat_copyout(&buf, args->statbuf);
694 LFREEPATH(path);
695
696 return (error);
697 }
698
699 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
700
701 int
702 linux_syncfs(struct thread *td, struct linux_syncfs_args *args)
703 {
704 struct mount *mp;
705 struct vnode *vp;
706 int error, save;
707
708 error = fgetvp(td, args->fd, &cap_fsync_rights, &vp);
709 if (error != 0)
710 /*
711 * Linux syncfs() returns only EBADF, however fgetvp()
712 * can return EINVAL in case of file descriptor does
713 * not represent a vnode. XXX.
714 */
715 return (error);
716
717 mp = vp->v_mount;
718 mtx_lock(&mountlist_mtx);
719 error = vfs_busy(mp, MBF_MNTLSTLOCK);
720 if (error != 0) {
721 /* See comment above. */
722 mtx_unlock(&mountlist_mtx);
723 goto out;
724 }
725 if ((mp->mnt_flag & MNT_RDONLY) == 0 &&
726 vn_start_write(NULL, &mp, V_NOWAIT) == 0) {
727 save = curthread_pflags_set(TDP_SYNCIO);
728 vfs_msync(mp, MNT_NOWAIT);
729 VFS_SYNC(mp, MNT_NOWAIT);
730 curthread_pflags_restore(save);
731 vn_finished_write(mp);
732 }
733 vfs_unbusy(mp);
734
735 out:
736 vrele(vp);
737 return (error);
738 }
Cache object: 5dd14f98fa362efadfe41ccfbe0f20e5
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