1 /*-
2 * Copyright (c) 1994-1995 Søren Schmidt
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
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. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/11.1/sys/compat/linux/linux_stats.c 316364 2017-04-01 17:09:55Z trasz $");
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 static int
85 linux_kern_stat(struct thread *td, char *path, enum uio_seg pathseg,
86 struct stat *sbp)
87 {
88
89 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp));
90 }
91
92 static int
93 linux_kern_lstat(struct thread *td, char *path, enum uio_seg pathseg,
94 struct stat *sbp)
95 {
96
97 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path,
98 pathseg, sbp));
99 }
100
101 static void
102 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf)
103 {
104 struct file *fp;
105 struct vnode *vp;
106 cap_rights_t rights;
107 int major, minor;
108
109 /*
110 * No capability rights required here.
111 */
112 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) ||
113 fget(td, fd, cap_rights_init(&rights), &fp) != 0)
114 return;
115 vp = fp->f_vnode;
116 if (vp != NULL && vp->v_rdev != NULL &&
117 linux_driver_get_major_minor(devtoname(vp->v_rdev),
118 &major, &minor) == 0) {
119 buf->st_rdev = (major << 8 | minor);
120 } else if (fp->f_type == DTYPE_PTS) {
121 struct tty *tp = fp->f_data;
122
123 /* Convert the numbers for the slave device. */
124 if (linux_driver_get_major_minor(devtoname(tp->t_dev),
125 &major, &minor) == 0) {
126 buf->st_rdev = (major << 8 | minor);
127 }
128 }
129 fdrop(fp, td);
130 }
131
132 static int
133 newstat_copyout(struct stat *buf, void *ubuf)
134 {
135 struct l_newstat tbuf;
136
137 bzero(&tbuf, sizeof(tbuf));
138 tbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
139 tbuf.st_ino = buf->st_ino;
140 tbuf.st_mode = buf->st_mode;
141 tbuf.st_nlink = buf->st_nlink;
142 tbuf.st_uid = buf->st_uid;
143 tbuf.st_gid = buf->st_gid;
144 tbuf.st_rdev = buf->st_rdev;
145 tbuf.st_size = buf->st_size;
146 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
147 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
148 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
149 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
150 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
151 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
152 tbuf.st_blksize = buf->st_blksize;
153 tbuf.st_blocks = buf->st_blocks;
154
155 return (copyout(&tbuf, ubuf, sizeof(tbuf)));
156 }
157
158 int
159 linux_newstat(struct thread *td, struct linux_newstat_args *args)
160 {
161 struct stat buf;
162 char *path;
163 int error;
164
165 LCONVPATHEXIST(td, args->path, &path);
166
167 #ifdef DEBUG
168 if (ldebug(newstat))
169 printf(ARGS(newstat, "%s, *"), path);
170 #endif
171
172 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
173 LFREEPATH(path);
174 if (error)
175 return (error);
176 return (newstat_copyout(&buf, args->buf));
177 }
178
179 int
180 linux_newlstat(struct thread *td, struct linux_newlstat_args *args)
181 {
182 struct stat sb;
183 char *path;
184 int error;
185
186 LCONVPATHEXIST(td, args->path, &path);
187
188 #ifdef DEBUG
189 if (ldebug(newlstat))
190 printf(ARGS(newlstat, "%s, *"), path);
191 #endif
192
193 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb);
194 LFREEPATH(path);
195 if (error)
196 return (error);
197 return (newstat_copyout(&sb, args->buf));
198 }
199
200 int
201 linux_newfstat(struct thread *td, struct linux_newfstat_args *args)
202 {
203 struct stat buf;
204 int error;
205
206 #ifdef DEBUG
207 if (ldebug(newfstat))
208 printf(ARGS(newfstat, "%d, *"), args->fd);
209 #endif
210
211 error = kern_fstat(td, args->fd, &buf);
212 translate_fd_major_minor(td, args->fd, &buf);
213 if (!error)
214 error = newstat_copyout(&buf, args->buf);
215
216 return (error);
217 }
218
219 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
220 static int
221 stat_copyout(struct stat *buf, void *ubuf)
222 {
223 struct l_stat lbuf;
224
225 bzero(&lbuf, sizeof(lbuf));
226 lbuf.st_dev = buf->st_dev;
227 lbuf.st_ino = buf->st_ino;
228 lbuf.st_mode = buf->st_mode;
229 lbuf.st_nlink = buf->st_nlink;
230 lbuf.st_uid = buf->st_uid;
231 lbuf.st_gid = buf->st_gid;
232 lbuf.st_rdev = buf->st_rdev;
233 if (buf->st_size < (quad_t)1 << 32)
234 lbuf.st_size = buf->st_size;
235 else
236 lbuf.st_size = -2;
237 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
238 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
239 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
240 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
241 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
242 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
243 lbuf.st_blksize = buf->st_blksize;
244 lbuf.st_blocks = buf->st_blocks;
245 lbuf.st_flags = buf->st_flags;
246 lbuf.st_gen = buf->st_gen;
247
248 return (copyout(&lbuf, ubuf, sizeof(lbuf)));
249 }
250
251 int
252 linux_stat(struct thread *td, struct linux_stat_args *args)
253 {
254 struct stat buf;
255 char *path;
256 int error;
257
258 LCONVPATHEXIST(td, args->path, &path);
259
260 #ifdef DEBUG
261 if (ldebug(stat))
262 printf(ARGS(stat, "%s, *"), path);
263 #endif
264 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
265 if (error) {
266 LFREEPATH(path);
267 return (error);
268 }
269 LFREEPATH(path);
270 return (stat_copyout(&buf, args->up));
271 }
272
273 int
274 linux_lstat(struct thread *td, struct linux_lstat_args *args)
275 {
276 struct stat buf;
277 char *path;
278 int error;
279
280 LCONVPATHEXIST(td, args->path, &path);
281
282 #ifdef DEBUG
283 if (ldebug(lstat))
284 printf(ARGS(lstat, "%s, *"), path);
285 #endif
286 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf);
287 if (error) {
288 LFREEPATH(path);
289 return (error);
290 }
291 LFREEPATH(path);
292 return (stat_copyout(&buf, args->up));
293 }
294 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
295
296 struct l_statfs {
297 l_long f_type;
298 l_long f_bsize;
299 l_long f_blocks;
300 l_long f_bfree;
301 l_long f_bavail;
302 l_long f_files;
303 l_long f_ffree;
304 l_fsid_t f_fsid;
305 l_long f_namelen;
306 l_long f_frsize;
307 l_long f_flags;
308 l_long f_spare[4];
309 };
310
311 #define LINUX_CODA_SUPER_MAGIC 0x73757245L
312 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L
313 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L
314 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L
315 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L
316 #define LINUX_NCP_SUPER_MAGIC 0x564cL
317 #define LINUX_NFS_SUPER_MAGIC 0x6969L
318 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL
319 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L
320 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */
321 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L
322 #define LINUX_SHMFS_MAGIC 0x01021994
323
324 static long
325 bsd_to_linux_ftype(const char *fstypename)
326 {
327 int i;
328 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = {
329 {"ufs", LINUX_UFS_SUPER_MAGIC},
330 {"cd9660", LINUX_ISOFS_SUPER_MAGIC},
331 {"nfs", LINUX_NFS_SUPER_MAGIC},
332 {"ext2fs", LINUX_EXT2_SUPER_MAGIC},
333 {"procfs", LINUX_PROC_SUPER_MAGIC},
334 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC},
335 {"ntfs", LINUX_NTFS_SUPER_MAGIC},
336 {"nwfs", LINUX_NCP_SUPER_MAGIC},
337 {"hpfs", LINUX_HPFS_SUPER_MAGIC},
338 {"coda", LINUX_CODA_SUPER_MAGIC},
339 {"devfs", LINUX_DEVFS_SUPER_MAGIC},
340 {"tmpfs", LINUX_SHMFS_MAGIC},
341 {NULL, 0L}};
342
343 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++)
344 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0)
345 return (b2l_tbl[i].linux_type);
346
347 return (0L);
348 }
349
350 static int
351 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs)
352 {
353 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
354 uint64_t tmp;
355
356 #define LINUX_HIBITS 0xffffffff00000000ULL
357
358 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files |
359 bsd_statfs->f_bsize;
360 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) ||
361 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) ||
362 (tmp & LINUX_HIBITS))
363 return (EOVERFLOW);
364 #undef LINUX_HIBITS
365 #endif
366 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
367 linux_statfs->f_bsize = bsd_statfs->f_bsize;
368 linux_statfs->f_blocks = bsd_statfs->f_blocks;
369 linux_statfs->f_bfree = bsd_statfs->f_bfree;
370 linux_statfs->f_bavail = bsd_statfs->f_bavail;
371 linux_statfs->f_ffree = bsd_statfs->f_ffree;
372 linux_statfs->f_files = bsd_statfs->f_files;
373 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
374 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
375 linux_statfs->f_namelen = MAXNAMLEN;
376 linux_statfs->f_frsize = bsd_statfs->f_bsize;
377 linux_statfs->f_flags = 0;
378 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare));
379
380 return (0);
381 }
382
383 int
384 linux_statfs(struct thread *td, struct linux_statfs_args *args)
385 {
386 struct l_statfs linux_statfs;
387 struct statfs *bsd_statfs;
388 char *path;
389 int error;
390
391 LCONVPATHEXIST(td, args->path, &path);
392
393 #ifdef DEBUG
394 if (ldebug(statfs))
395 printf(ARGS(statfs, "%s, *"), path);
396 #endif
397 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
398 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs);
399 LFREEPATH(path);
400 if (error == 0)
401 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs);
402 free(bsd_statfs, M_STATFS);
403 if (error != 0)
404 return (error);
405 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
406 }
407
408 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
409 static void
410 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs)
411 {
412
413 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
414 linux_statfs->f_bsize = bsd_statfs->f_bsize;
415 linux_statfs->f_blocks = bsd_statfs->f_blocks;
416 linux_statfs->f_bfree = bsd_statfs->f_bfree;
417 linux_statfs->f_bavail = bsd_statfs->f_bavail;
418 linux_statfs->f_ffree = bsd_statfs->f_ffree;
419 linux_statfs->f_files = bsd_statfs->f_files;
420 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
421 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
422 linux_statfs->f_namelen = MAXNAMLEN;
423 linux_statfs->f_frsize = bsd_statfs->f_bsize;
424 linux_statfs->f_flags = 0;
425 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare));
426 }
427
428 int
429 linux_statfs64(struct thread *td, struct linux_statfs64_args *args)
430 {
431 struct l_statfs64 linux_statfs;
432 struct statfs *bsd_statfs;
433 char *path;
434 int error;
435
436 if (args->bufsize != sizeof(struct l_statfs64))
437 return EINVAL;
438
439 LCONVPATHEXIST(td, args->path, &path);
440
441 #ifdef DEBUG
442 if (ldebug(statfs64))
443 printf(ARGS(statfs64, "%s, *"), path);
444 #endif
445 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
446 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs);
447 LFREEPATH(path);
448 if (error == 0)
449 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs);
450 free(bsd_statfs, M_STATFS);
451 if (error != 0)
452 return (error);
453 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
454 }
455
456 int
457 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args)
458 {
459 struct l_statfs64 linux_statfs;
460 struct statfs *bsd_statfs;
461 int error;
462
463 #ifdef DEBUG
464 if (ldebug(fstatfs64))
465 printf(ARGS(fstatfs64, "%d, *"), args->fd);
466 #endif
467 if (args->bufsize != sizeof(struct l_statfs64))
468 return (EINVAL);
469
470 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
471 error = kern_fstatfs(td, args->fd, bsd_statfs);
472 if (error == 0)
473 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs);
474 free(bsd_statfs, M_STATFS);
475 if (error != 0)
476 return (error);
477 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
478 }
479 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
480
481 int
482 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args)
483 {
484 struct l_statfs linux_statfs;
485 struct statfs *bsd_statfs;
486 int error;
487
488 #ifdef DEBUG
489 if (ldebug(fstatfs))
490 printf(ARGS(fstatfs, "%d, *"), args->fd);
491 #endif
492 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
493 error = kern_fstatfs(td, args->fd, bsd_statfs);
494 if (error == 0)
495 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs);
496 free(bsd_statfs, M_STATFS);
497 if (error != 0)
498 return (error);
499 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
500 }
501
502 struct l_ustat
503 {
504 l_daddr_t f_tfree;
505 l_ino_t f_tinode;
506 char f_fname[6];
507 char f_fpack[6];
508 };
509
510 int
511 linux_ustat(struct thread *td, struct linux_ustat_args *args)
512 {
513 #ifdef DEBUG
514 if (ldebug(ustat))
515 printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev);
516 #endif
517
518 return (EOPNOTSUPP);
519 }
520
521 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
522
523 static int
524 stat64_copyout(struct stat *buf, void *ubuf)
525 {
526 struct l_stat64 lbuf;
527
528 bzero(&lbuf, sizeof(lbuf));
529 lbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
530 lbuf.st_ino = buf->st_ino;
531 lbuf.st_mode = buf->st_mode;
532 lbuf.st_nlink = buf->st_nlink;
533 lbuf.st_uid = buf->st_uid;
534 lbuf.st_gid = buf->st_gid;
535 lbuf.st_rdev = buf->st_rdev;
536 lbuf.st_size = buf->st_size;
537 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
538 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
539 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
540 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
541 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
542 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
543 lbuf.st_blksize = buf->st_blksize;
544 lbuf.st_blocks = buf->st_blocks;
545
546 /*
547 * The __st_ino field makes all the difference. In the Linux kernel
548 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO,
549 * but without the assignment to __st_ino the runtime linker refuses
550 * to mmap(2) any shared libraries. I guess it's broken alright :-)
551 */
552 lbuf.__st_ino = buf->st_ino;
553
554 return (copyout(&lbuf, ubuf, sizeof(lbuf)));
555 }
556
557 int
558 linux_stat64(struct thread *td, struct linux_stat64_args *args)
559 {
560 struct stat buf;
561 char *filename;
562 int error;
563
564 LCONVPATHEXIST(td, args->filename, &filename);
565
566 #ifdef DEBUG
567 if (ldebug(stat64))
568 printf(ARGS(stat64, "%s, *"), filename);
569 #endif
570
571 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf);
572 LFREEPATH(filename);
573 if (error)
574 return (error);
575 return (stat64_copyout(&buf, args->statbuf));
576 }
577
578 int
579 linux_lstat64(struct thread *td, struct linux_lstat64_args *args)
580 {
581 struct stat sb;
582 char *filename;
583 int error;
584
585 LCONVPATHEXIST(td, args->filename, &filename);
586
587 #ifdef DEBUG
588 if (ldebug(lstat64))
589 printf(ARGS(lstat64, "%s, *"), args->filename);
590 #endif
591
592 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb);
593 LFREEPATH(filename);
594 if (error)
595 return (error);
596 return (stat64_copyout(&sb, args->statbuf));
597 }
598
599 int
600 linux_fstat64(struct thread *td, struct linux_fstat64_args *args)
601 {
602 struct stat buf;
603 int error;
604
605 #ifdef DEBUG
606 if (ldebug(fstat64))
607 printf(ARGS(fstat64, "%d, *"), args->fd);
608 #endif
609
610 error = kern_fstat(td, args->fd, &buf);
611 translate_fd_major_minor(td, args->fd, &buf);
612 if (!error)
613 error = stat64_copyout(&buf, args->statbuf);
614
615 return (error);
616 }
617
618 int
619 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args)
620 {
621 char *path;
622 int error, dfd, flag;
623 struct stat buf;
624
625 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
626 return (EINVAL);
627 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
628 AT_SYMLINK_NOFOLLOW : 0;
629
630 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
631 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
632
633 #ifdef DEBUG
634 if (ldebug(fstatat64))
635 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag);
636 #endif
637
638 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
639 if (!error)
640 error = stat64_copyout(&buf, args->statbuf);
641 LFREEPATH(path);
642
643 return (error);
644 }
645
646 #else /* __amd64__ && !COMPAT_LINUX32 */
647
648 int
649 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args)
650 {
651 char *path;
652 int error, dfd, flag;
653 struct stat buf;
654
655 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
656 return (EINVAL);
657 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
658 AT_SYMLINK_NOFOLLOW : 0;
659
660 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
661 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
662
663 #ifdef DEBUG
664 if (ldebug(newfstatat))
665 printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag);
666 #endif
667
668 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
669 if (error == 0)
670 error = newstat_copyout(&buf, args->statbuf);
671 LFREEPATH(path);
672
673 return (error);
674 }
675
676 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
677
678 int
679 linux_syncfs(struct thread *td, struct linux_syncfs_args *args)
680 {
681 cap_rights_t rights;
682 struct mount *mp;
683 struct vnode *vp;
684 int error, save;
685
686 error = fgetvp(td, args->fd, cap_rights_init(&rights, CAP_FSYNC), &vp);
687 if (error != 0)
688 /*
689 * Linux syncfs() returns only EBADF, however fgetvp()
690 * can return EINVAL in case of file descriptor does
691 * not represent a vnode. XXX.
692 */
693 return (error);
694
695 mp = vp->v_mount;
696 mtx_lock(&mountlist_mtx);
697 error = vfs_busy(mp, MBF_MNTLSTLOCK);
698 if (error != 0) {
699 /* See comment above. */
700 mtx_unlock(&mountlist_mtx);
701 goto out;
702 }
703 if ((mp->mnt_flag & MNT_RDONLY) == 0 &&
704 vn_start_write(NULL, &mp, V_NOWAIT) == 0) {
705 save = curthread_pflags_set(TDP_SYNCIO);
706 vfs_msync(mp, MNT_NOWAIT);
707 VFS_SYNC(mp, MNT_NOWAIT);
708 curthread_pflags_restore(save);
709 vn_finished_write(mp);
710 }
711 vfs_unbusy(mp);
712
713 out:
714 vrele(vp);
715 return (error);
716 }
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