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("$FreeBSD$");
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
translate_vnhook_major_minor(struct vnode * vp,struct stat * sb)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
linux_kern_statat(struct thread * td,int flag,int fd,char * path,enum uio_seg pathseg,struct stat * sbp)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
linux_kern_stat(struct thread * td,char * path,enum uio_seg pathseg,struct stat * sbp)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
linux_kern_lstat(struct thread * td,char * path,enum uio_seg pathseg,struct stat * sbp)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
translate_fd_major_minor(struct thread * td,int fd,struct stat * buf)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
newstat_copyout(struct stat * buf,void * ubuf)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
linux_newstat(struct thread * td,struct linux_newstat_args * args)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
linux_newlstat(struct thread * td,struct linux_newlstat_args * args)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
linux_newfstat(struct thread * td,struct linux_newfstat_args * args)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
stat_copyout(struct stat * buf,void * ubuf)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
linux_stat(struct thread * td,struct linux_stat_args * args)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
linux_lstat(struct thread * td,struct linux_lstat_args * args)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
bsd_to_linux_ftype(const char * fstypename)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 void
bsd_to_linux_statfs(struct statfs * bsd_statfs,struct l_statfs * linux_statfs)385 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs)
386 {
387
388 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
389 linux_statfs->f_bsize = bsd_statfs->f_bsize;
390 linux_statfs->f_blocks = bsd_statfs->f_blocks;
391 linux_statfs->f_bfree = bsd_statfs->f_bfree;
392 linux_statfs->f_bavail = bsd_statfs->f_bavail;
393 linux_statfs->f_ffree = bsd_statfs->f_ffree;
394 linux_statfs->f_files = bsd_statfs->f_files;
395 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
396 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
397 linux_statfs->f_namelen = MAXNAMLEN;
398 }
399
400 int
linux_statfs(struct thread * td,struct linux_statfs_args * args)401 linux_statfs(struct thread *td, struct linux_statfs_args *args)
402 {
403 struct l_statfs linux_statfs;
404 struct statfs bsd_statfs;
405 char *path;
406 int error;
407
408 LCONVPATHEXIST(td, args->path, &path);
409
410 #ifdef DEBUG
411 if (ldebug(statfs))
412 printf(ARGS(statfs, "%s, *"), path);
413 #endif
414 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
415 LFREEPATH(path);
416 if (error)
417 return (error);
418 bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
419 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
420 }
421
422 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
423 static void
bsd_to_linux_statfs64(struct statfs * bsd_statfs,struct l_statfs64 * linux_statfs)424 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs)
425 {
426
427 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
428 linux_statfs->f_bsize = bsd_statfs->f_bsize;
429 linux_statfs->f_blocks = bsd_statfs->f_blocks;
430 linux_statfs->f_bfree = bsd_statfs->f_bfree;
431 linux_statfs->f_bavail = bsd_statfs->f_bavail;
432 linux_statfs->f_ffree = bsd_statfs->f_ffree;
433 linux_statfs->f_files = bsd_statfs->f_files;
434 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
435 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
436 linux_statfs->f_namelen = MAXNAMLEN;
437 }
438
439 int
linux_statfs64(struct thread * td,struct linux_statfs64_args * args)440 linux_statfs64(struct thread *td, struct linux_statfs64_args *args)
441 {
442 struct l_statfs64 linux_statfs;
443 struct statfs bsd_statfs;
444 char *path;
445 int error;
446
447 if (args->bufsize != sizeof(struct l_statfs64))
448 return EINVAL;
449
450 LCONVPATHEXIST(td, args->path, &path);
451
452 #ifdef DEBUG
453 if (ldebug(statfs64))
454 printf(ARGS(statfs64, "%s, *"), path);
455 #endif
456 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
457 LFREEPATH(path);
458 if (error)
459 return (error);
460 bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs);
461 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
462 }
463 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
464
465 int
linux_fstatfs(struct thread * td,struct linux_fstatfs_args * args)466 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args)
467 {
468 struct l_statfs linux_statfs;
469 struct statfs bsd_statfs;
470 int error;
471
472 #ifdef DEBUG
473 if (ldebug(fstatfs))
474 printf(ARGS(fstatfs, "%d, *"), args->fd);
475 #endif
476 error = kern_fstatfs(td, args->fd, &bsd_statfs);
477 if (error)
478 return error;
479 bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
480 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
481 }
482
483 struct l_ustat
484 {
485 l_daddr_t f_tfree;
486 l_ino_t f_tinode;
487 char f_fname[6];
488 char f_fpack[6];
489 };
490
491 int
linux_ustat(struct thread * td,struct linux_ustat_args * args)492 linux_ustat(struct thread *td, struct linux_ustat_args *args)
493 {
494 #ifdef DEBUG
495 if (ldebug(ustat))
496 printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev);
497 #endif
498
499 return (EOPNOTSUPP);
500 }
501
502 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
503
504 static int
stat64_copyout(struct stat * buf,void * ubuf)505 stat64_copyout(struct stat *buf, void *ubuf)
506 {
507 struct l_stat64 lbuf;
508
509 bzero(&lbuf, sizeof(lbuf));
510 lbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
511 lbuf.st_ino = buf->st_ino;
512 lbuf.st_mode = buf->st_mode;
513 lbuf.st_nlink = buf->st_nlink;
514 lbuf.st_uid = buf->st_uid;
515 lbuf.st_gid = buf->st_gid;
516 lbuf.st_rdev = buf->st_rdev;
517 lbuf.st_size = buf->st_size;
518 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
519 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
520 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
521 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
522 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
523 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
524 lbuf.st_blksize = buf->st_blksize;
525 lbuf.st_blocks = buf->st_blocks;
526
527 /*
528 * The __st_ino field makes all the difference. In the Linux kernel
529 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO,
530 * but without the assignment to __st_ino the runtime linker refuses
531 * to mmap(2) any shared libraries. I guess it's broken alright :-)
532 */
533 lbuf.__st_ino = buf->st_ino;
534
535 return (copyout(&lbuf, ubuf, sizeof(lbuf)));
536 }
537
538 int
linux_stat64(struct thread * td,struct linux_stat64_args * args)539 linux_stat64(struct thread *td, struct linux_stat64_args *args)
540 {
541 struct stat buf;
542 char *filename;
543 int error;
544
545 LCONVPATHEXIST(td, args->filename, &filename);
546
547 #ifdef DEBUG
548 if (ldebug(stat64))
549 printf(ARGS(stat64, "%s, *"), filename);
550 #endif
551
552 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf);
553 LFREEPATH(filename);
554 if (error)
555 return (error);
556 return (stat64_copyout(&buf, args->statbuf));
557 }
558
559 int
linux_lstat64(struct thread * td,struct linux_lstat64_args * args)560 linux_lstat64(struct thread *td, struct linux_lstat64_args *args)
561 {
562 struct stat sb;
563 char *filename;
564 int error;
565
566 LCONVPATHEXIST(td, args->filename, &filename);
567
568 #ifdef DEBUG
569 if (ldebug(lstat64))
570 printf(ARGS(lstat64, "%s, *"), args->filename);
571 #endif
572
573 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb);
574 LFREEPATH(filename);
575 if (error)
576 return (error);
577 return (stat64_copyout(&sb, args->statbuf));
578 }
579
580 int
linux_fstat64(struct thread * td,struct linux_fstat64_args * args)581 linux_fstat64(struct thread *td, struct linux_fstat64_args *args)
582 {
583 struct stat buf;
584 int error;
585
586 #ifdef DEBUG
587 if (ldebug(fstat64))
588 printf(ARGS(fstat64, "%d, *"), args->fd);
589 #endif
590
591 error = kern_fstat(td, args->fd, &buf);
592 translate_fd_major_minor(td, args->fd, &buf);
593 if (!error)
594 error = stat64_copyout(&buf, args->statbuf);
595
596 return (error);
597 }
598
599 int
linux_fstatat64(struct thread * td,struct linux_fstatat64_args * args)600 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args)
601 {
602 char *path;
603 int error, dfd, flag;
604 struct stat buf;
605
606 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
607 return (EINVAL);
608 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
609 AT_SYMLINK_NOFOLLOW : 0;
610
611 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
612 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
613
614 #ifdef DEBUG
615 if (ldebug(fstatat64))
616 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag);
617 #endif
618
619 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
620 if (!error)
621 error = stat64_copyout(&buf, args->statbuf);
622 LFREEPATH(path);
623
624 return (error);
625 }
626
627 #else /* __amd64__ && !COMPAT_LINUX32 */
628
629 int
linux_newfstatat(struct thread * td,struct linux_newfstatat_args * args)630 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args)
631 {
632 char *path;
633 int error, dfd, flag;
634 struct stat buf;
635
636 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
637 return (EINVAL);
638 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
639 AT_SYMLINK_NOFOLLOW : 0;
640
641 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
642 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
643
644 #ifdef DEBUG
645 if (ldebug(newfstatat))
646 printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag);
647 #endif
648
649 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
650 if (error == 0)
651 error = newstat_copyout(&buf, args->statbuf);
652 LFREEPATH(path);
653
654 return (error);
655 }
656
657 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
658
659 int
linux_syncfs(struct thread * td,struct linux_syncfs_args * args)660 linux_syncfs(struct thread *td, struct linux_syncfs_args *args)
661 {
662 cap_rights_t rights;
663 struct mount *mp;
664 struct vnode *vp;
665 int error, save;
666
667 error = fgetvp(td, args->fd, cap_rights_init(&rights, CAP_FSYNC), &vp);
668 if (error != 0)
669 /*
670 * Linux syncfs() returns only EBADF, however fgetvp()
671 * can return EINVAL in case of file descriptor does
672 * not represent a vnode. XXX.
673 */
674 return (error);
675
676 mp = vp->v_mount;
677 mtx_lock(&mountlist_mtx);
678 error = vfs_busy(mp, MBF_MNTLSTLOCK);
679 if (error != 0) {
680 /* See comment above. */
681 mtx_unlock(&mountlist_mtx);
682 goto out;
683 }
684 if ((mp->mnt_flag & MNT_RDONLY) == 0 &&
685 vn_start_write(NULL, &mp, V_NOWAIT) == 0) {
686 save = curthread_pflags_set(TDP_SYNCIO);
687 vfs_msync(mp, MNT_NOWAIT);
688 VFS_SYNC(mp, MNT_NOWAIT);
689 curthread_pflags_restore(save);
690 vn_finished_write(mp);
691 }
692 vfs_unbusy(mp);
693
694 out:
695 vrele(vp);
696 return (error);
697 }
698