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/11.0/sys/compat/linux/linux_stats.c 297072 2016-03-20 19:06:21Z dchagin $");
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 /*
102 * XXX: This was removed from newstat_copyout(), and almost identical
103 * XXX: code was in stat64_copyout(). findcdev() needs to be replaced
104 * XXX: with something that does lookup and locking properly.
105 * XXX: When somebody fixes this: please try to avoid duplicating it.
106 */
107 #if 0
108 static void
109 disk_foo(struct somestat *tbuf)
110 {
111 struct cdevsw *cdevsw;
112 struct cdev *dev;
113
114 /* Lie about disk drives which are character devices
115 * in FreeBSD but block devices under Linux.
116 */
117 if (S_ISCHR(tbuf.st_mode) &&
118 (dev = findcdev(buf->st_rdev)) != NULL) {
119 cdevsw = dev_refthread(dev);
120 if (cdevsw != NULL) {
121 if (cdevsw->d_flags & D_DISK) {
122 tbuf.st_mode &= ~S_IFMT;
123 tbuf.st_mode |= S_IFBLK;
124
125 /* XXX this may not be quite right */
126 /* Map major number to 0 */
127 tbuf.st_dev = minor(buf->st_dev) & 0xf;
128 tbuf.st_rdev = buf->st_rdev & 0xff;
129 }
130 dev_relthread(dev);
131 }
132 }
133
134 }
135 #endif
136
137 static void
138 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf)
139 {
140 struct file *fp;
141 struct vnode *vp;
142 cap_rights_t rights;
143 int major, minor;
144
145 /*
146 * No capability rights required here.
147 */
148 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) ||
149 fget(td, fd, cap_rights_init(&rights), &fp) != 0)
150 return;
151 vp = fp->f_vnode;
152 if (vp != NULL && vp->v_rdev != NULL &&
153 linux_driver_get_major_minor(devtoname(vp->v_rdev),
154 &major, &minor) == 0) {
155 buf->st_rdev = (major << 8 | minor);
156 } else if (fp->f_type == DTYPE_PTS) {
157 struct tty *tp = fp->f_data;
158
159 /* Convert the numbers for the slave device. */
160 if (linux_driver_get_major_minor(devtoname(tp->t_dev),
161 &major, &minor) == 0) {
162 buf->st_rdev = (major << 8 | minor);
163 }
164 }
165 fdrop(fp, td);
166 }
167
168 static int
169 newstat_copyout(struct stat *buf, void *ubuf)
170 {
171 struct l_newstat tbuf;
172
173 bzero(&tbuf, sizeof(tbuf));
174 tbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
175 tbuf.st_ino = buf->st_ino;
176 tbuf.st_mode = buf->st_mode;
177 tbuf.st_nlink = buf->st_nlink;
178 tbuf.st_uid = buf->st_uid;
179 tbuf.st_gid = buf->st_gid;
180 tbuf.st_rdev = buf->st_rdev;
181 tbuf.st_size = buf->st_size;
182 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
183 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
184 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
185 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
186 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
187 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
188 tbuf.st_blksize = buf->st_blksize;
189 tbuf.st_blocks = buf->st_blocks;
190
191 return (copyout(&tbuf, ubuf, sizeof(tbuf)));
192 }
193
194 int
195 linux_newstat(struct thread *td, struct linux_newstat_args *args)
196 {
197 struct stat buf;
198 char *path;
199 int error;
200
201 LCONVPATHEXIST(td, args->path, &path);
202
203 #ifdef DEBUG
204 if (ldebug(newstat))
205 printf(ARGS(newstat, "%s, *"), path);
206 #endif
207
208 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
209 LFREEPATH(path);
210 if (error)
211 return (error);
212 return (newstat_copyout(&buf, args->buf));
213 }
214
215 int
216 linux_newlstat(struct thread *td, struct linux_newlstat_args *args)
217 {
218 struct stat sb;
219 char *path;
220 int error;
221
222 LCONVPATHEXIST(td, args->path, &path);
223
224 #ifdef DEBUG
225 if (ldebug(newlstat))
226 printf(ARGS(newlstat, "%s, *"), path);
227 #endif
228
229 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb);
230 LFREEPATH(path);
231 if (error)
232 return (error);
233 return (newstat_copyout(&sb, args->buf));
234 }
235
236 int
237 linux_newfstat(struct thread *td, struct linux_newfstat_args *args)
238 {
239 struct stat buf;
240 int error;
241
242 #ifdef DEBUG
243 if (ldebug(newfstat))
244 printf(ARGS(newfstat, "%d, *"), args->fd);
245 #endif
246
247 error = kern_fstat(td, args->fd, &buf);
248 translate_fd_major_minor(td, args->fd, &buf);
249 if (!error)
250 error = newstat_copyout(&buf, args->buf);
251
252 return (error);
253 }
254
255 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
256 static int
257 stat_copyout(struct stat *buf, void *ubuf)
258 {
259 struct l_stat lbuf;
260
261 bzero(&lbuf, sizeof(lbuf));
262 lbuf.st_dev = buf->st_dev;
263 lbuf.st_ino = buf->st_ino;
264 lbuf.st_mode = buf->st_mode;
265 lbuf.st_nlink = buf->st_nlink;
266 lbuf.st_uid = buf->st_uid;
267 lbuf.st_gid = buf->st_gid;
268 lbuf.st_rdev = buf->st_rdev;
269 if (buf->st_size < (quad_t)1 << 32)
270 lbuf.st_size = buf->st_size;
271 else
272 lbuf.st_size = -2;
273 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
274 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
275 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
276 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
277 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
278 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
279 lbuf.st_blksize = buf->st_blksize;
280 lbuf.st_blocks = buf->st_blocks;
281 lbuf.st_flags = buf->st_flags;
282 lbuf.st_gen = buf->st_gen;
283
284 return (copyout(&lbuf, ubuf, sizeof(lbuf)));
285 }
286
287 int
288 linux_stat(struct thread *td, struct linux_stat_args *args)
289 {
290 struct stat buf;
291 char *path;
292 int error;
293
294 LCONVPATHEXIST(td, args->path, &path);
295
296 #ifdef DEBUG
297 if (ldebug(stat))
298 printf(ARGS(stat, "%s, *"), path);
299 #endif
300 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
301 if (error) {
302 LFREEPATH(path);
303 return (error);
304 }
305 LFREEPATH(path);
306 return (stat_copyout(&buf, args->up));
307 }
308
309 int
310 linux_lstat(struct thread *td, struct linux_lstat_args *args)
311 {
312 struct stat buf;
313 char *path;
314 int error;
315
316 LCONVPATHEXIST(td, args->path, &path);
317
318 #ifdef DEBUG
319 if (ldebug(lstat))
320 printf(ARGS(lstat, "%s, *"), path);
321 #endif
322 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf);
323 if (error) {
324 LFREEPATH(path);
325 return (error);
326 }
327 LFREEPATH(path);
328 return (stat_copyout(&buf, args->up));
329 }
330 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
331
332 struct l_statfs {
333 l_long f_type;
334 l_long f_bsize;
335 l_long f_blocks;
336 l_long f_bfree;
337 l_long f_bavail;
338 l_long f_files;
339 l_long f_ffree;
340 l_fsid_t f_fsid;
341 l_long f_namelen;
342 l_long f_spare[6];
343 };
344
345 #define LINUX_CODA_SUPER_MAGIC 0x73757245L
346 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L
347 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L
348 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L
349 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L
350 #define LINUX_NCP_SUPER_MAGIC 0x564cL
351 #define LINUX_NFS_SUPER_MAGIC 0x6969L
352 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL
353 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L
354 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */
355 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L
356 #define LINUX_SHMFS_MAGIC 0x01021994
357
358 static long
359 bsd_to_linux_ftype(const char *fstypename)
360 {
361 int i;
362 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = {
363 {"ufs", LINUX_UFS_SUPER_MAGIC},
364 {"cd9660", LINUX_ISOFS_SUPER_MAGIC},
365 {"nfs", LINUX_NFS_SUPER_MAGIC},
366 {"ext2fs", LINUX_EXT2_SUPER_MAGIC},
367 {"procfs", LINUX_PROC_SUPER_MAGIC},
368 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC},
369 {"ntfs", LINUX_NTFS_SUPER_MAGIC},
370 {"nwfs", LINUX_NCP_SUPER_MAGIC},
371 {"hpfs", LINUX_HPFS_SUPER_MAGIC},
372 {"coda", LINUX_CODA_SUPER_MAGIC},
373 {"devfs", LINUX_DEVFS_SUPER_MAGIC},
374 {"tmpfs", LINUX_SHMFS_MAGIC},
375 {NULL, 0L}};
376
377 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++)
378 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0)
379 return (b2l_tbl[i].linux_type);
380
381 return (0L);
382 }
383
384 static int
385 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs)
386 {
387 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
388 uint64_t tmp;
389
390 #define LINUX_HIBITS 0xffffffff00000000ULL
391
392 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files |
393 bsd_statfs->f_bsize;
394 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) ||
395 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) ||
396 (tmp & LINUX_HIBITS))
397 return (EOVERFLOW);
398 #undef LINUX_HIBITS
399 #endif
400 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
401 linux_statfs->f_bsize = bsd_statfs->f_bsize;
402 linux_statfs->f_blocks = bsd_statfs->f_blocks;
403 linux_statfs->f_bfree = bsd_statfs->f_bfree;
404 linux_statfs->f_bavail = bsd_statfs->f_bavail;
405 linux_statfs->f_ffree = bsd_statfs->f_ffree;
406 linux_statfs->f_files = bsd_statfs->f_files;
407 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
408 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
409 linux_statfs->f_namelen = MAXNAMLEN;
410
411 return (0);
412 }
413
414 int
415 linux_statfs(struct thread *td, struct linux_statfs_args *args)
416 {
417 struct l_statfs linux_statfs;
418 struct statfs bsd_statfs;
419 char *path;
420 int error;
421
422 LCONVPATHEXIST(td, args->path, &path);
423
424 #ifdef DEBUG
425 if (ldebug(statfs))
426 printf(ARGS(statfs, "%s, *"), path);
427 #endif
428 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
429 LFREEPATH(path);
430 if (error)
431 return (error);
432 error = bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
433 if (error)
434 return (error);
435 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
436 }
437
438 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
439 static void
440 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs)
441 {
442
443 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
444 linux_statfs->f_bsize = bsd_statfs->f_bsize;
445 linux_statfs->f_blocks = bsd_statfs->f_blocks;
446 linux_statfs->f_bfree = bsd_statfs->f_bfree;
447 linux_statfs->f_bavail = bsd_statfs->f_bavail;
448 linux_statfs->f_ffree = bsd_statfs->f_ffree;
449 linux_statfs->f_files = bsd_statfs->f_files;
450 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
451 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
452 linux_statfs->f_namelen = MAXNAMLEN;
453 }
454
455 int
456 linux_statfs64(struct thread *td, struct linux_statfs64_args *args)
457 {
458 struct l_statfs64 linux_statfs;
459 struct statfs bsd_statfs;
460 char *path;
461 int error;
462
463 if (args->bufsize != sizeof(struct l_statfs64))
464 return EINVAL;
465
466 LCONVPATHEXIST(td, args->path, &path);
467
468 #ifdef DEBUG
469 if (ldebug(statfs64))
470 printf(ARGS(statfs64, "%s, *"), path);
471 #endif
472 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
473 LFREEPATH(path);
474 if (error)
475 return (error);
476 bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs);
477 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
478 }
479
480 int
481 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args)
482 {
483 struct l_statfs64 linux_statfs;
484 struct statfs bsd_statfs;
485 int error;
486
487 #ifdef DEBUG
488 if (ldebug(fstatfs64))
489 printf(ARGS(fstatfs64, "%d, *"), args->fd);
490 #endif
491 if (args->bufsize != sizeof(struct l_statfs64))
492 return (EINVAL);
493
494 error = kern_fstatfs(td, args->fd, &bsd_statfs);
495 if (error)
496 return error;
497 bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs);
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 error = kern_fstatfs(td, args->fd, &bsd_statfs);
514 if (error)
515 return (error);
516 error = bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
517 if (error)
518 return (error);
519 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
520 }
521
522 struct l_ustat
523 {
524 l_daddr_t f_tfree;
525 l_ino_t f_tinode;
526 char f_fname[6];
527 char f_fpack[6];
528 };
529
530 int
531 linux_ustat(struct thread *td, struct linux_ustat_args *args)
532 {
533 #ifdef DEBUG
534 if (ldebug(ustat))
535 printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev);
536 #endif
537
538 return (EOPNOTSUPP);
539 }
540
541 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
542
543 static int
544 stat64_copyout(struct stat *buf, void *ubuf)
545 {
546 struct l_stat64 lbuf;
547
548 bzero(&lbuf, sizeof(lbuf));
549 lbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
550 lbuf.st_ino = buf->st_ino;
551 lbuf.st_mode = buf->st_mode;
552 lbuf.st_nlink = buf->st_nlink;
553 lbuf.st_uid = buf->st_uid;
554 lbuf.st_gid = buf->st_gid;
555 lbuf.st_rdev = buf->st_rdev;
556 lbuf.st_size = buf->st_size;
557 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
558 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
559 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
560 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
561 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
562 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
563 lbuf.st_blksize = buf->st_blksize;
564 lbuf.st_blocks = buf->st_blocks;
565
566 /*
567 * The __st_ino field makes all the difference. In the Linux kernel
568 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO,
569 * but without the assignment to __st_ino the runtime linker refuses
570 * to mmap(2) any shared libraries. I guess it's broken alright :-)
571 */
572 lbuf.__st_ino = buf->st_ino;
573
574 return (copyout(&lbuf, ubuf, sizeof(lbuf)));
575 }
576
577 int
578 linux_stat64(struct thread *td, struct linux_stat64_args *args)
579 {
580 struct stat buf;
581 char *filename;
582 int error;
583
584 LCONVPATHEXIST(td, args->filename, &filename);
585
586 #ifdef DEBUG
587 if (ldebug(stat64))
588 printf(ARGS(stat64, "%s, *"), filename);
589 #endif
590
591 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf);
592 LFREEPATH(filename);
593 if (error)
594 return (error);
595 return (stat64_copyout(&buf, args->statbuf));
596 }
597
598 int
599 linux_lstat64(struct thread *td, struct linux_lstat64_args *args)
600 {
601 struct stat sb;
602 char *filename;
603 int error;
604
605 LCONVPATHEXIST(td, args->filename, &filename);
606
607 #ifdef DEBUG
608 if (ldebug(lstat64))
609 printf(ARGS(lstat64, "%s, *"), args->filename);
610 #endif
611
612 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb);
613 LFREEPATH(filename);
614 if (error)
615 return (error);
616 return (stat64_copyout(&sb, args->statbuf));
617 }
618
619 int
620 linux_fstat64(struct thread *td, struct linux_fstat64_args *args)
621 {
622 struct stat buf;
623 int error;
624
625 #ifdef DEBUG
626 if (ldebug(fstat64))
627 printf(ARGS(fstat64, "%d, *"), args->fd);
628 #endif
629
630 error = kern_fstat(td, args->fd, &buf);
631 translate_fd_major_minor(td, args->fd, &buf);
632 if (!error)
633 error = stat64_copyout(&buf, args->statbuf);
634
635 return (error);
636 }
637
638 int
639 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args)
640 {
641 char *path;
642 int error, dfd, flag;
643 struct stat buf;
644
645 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
646 return (EINVAL);
647 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
648 AT_SYMLINK_NOFOLLOW : 0;
649
650 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
651 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
652
653 #ifdef DEBUG
654 if (ldebug(fstatat64))
655 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag);
656 #endif
657
658 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
659 if (!error)
660 error = stat64_copyout(&buf, args->statbuf);
661 LFREEPATH(path);
662
663 return (error);
664 }
665
666 #else /* __amd64__ && !COMPAT_LINUX32 */
667
668 int
669 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args)
670 {
671 char *path;
672 int error, dfd, flag;
673 struct stat buf;
674
675 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
676 return (EINVAL);
677 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
678 AT_SYMLINK_NOFOLLOW : 0;
679
680 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
681 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
682
683 #ifdef DEBUG
684 if (ldebug(newfstatat))
685 printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag);
686 #endif
687
688 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
689 if (error == 0)
690 error = newstat_copyout(&buf, args->statbuf);
691 LFREEPATH(path);
692
693 return (error);
694 }
695
696 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
697
698 int
699 linux_syncfs(struct thread *td, struct linux_syncfs_args *args)
700 {
701 cap_rights_t rights;
702 struct mount *mp;
703 struct vnode *vp;
704 int error, save;
705
706 error = fgetvp(td, args->fd, cap_rights_init(&rights, CAP_FSYNC), &vp);
707 if (error != 0)
708 /*
709 * Linux syncfs() returns only EBADF, however fgetvp()
710 * can return EINVAL in case of file descriptor does
711 * not represent a vnode. XXX.
712 */
713 return (error);
714
715 mp = vp->v_mount;
716 mtx_lock(&mountlist_mtx);
717 error = vfs_busy(mp, MBF_MNTLSTLOCK);
718 if (error != 0) {
719 /* See comment above. */
720 mtx_unlock(&mountlist_mtx);
721 goto out;
722 }
723 if ((mp->mnt_flag & MNT_RDONLY) == 0 &&
724 vn_start_write(NULL, &mp, V_NOWAIT) == 0) {
725 save = curthread_pflags_set(TDP_SYNCIO);
726 vfs_msync(mp, MNT_NOWAIT);
727 VFS_SYNC(mp, MNT_NOWAIT);
728 curthread_pflags_restore(save);
729 vn_finished_write(mp);
730 }
731 vfs_unbusy(mp);
732
733 out:
734 vrele(vp);
735 return (error);
736 }
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