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: stable/10/sys/compat/linux/linux_stats.c 323366 2017-09-09 14:30:16Z 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
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_vnhook(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 int major, minor;
143
144 /*
145 * No capability rights required here.
146 */
147 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) ||
148 fget(td, fd, 0, &fp) != 0)
149 return;
150 vp = fp->f_vnode;
151 if (vp != NULL && vp->v_rdev != NULL &&
152 linux_driver_get_major_minor(devtoname(vp->v_rdev),
153 &major, &minor) == 0) {
154 buf->st_rdev = (major << 8 | minor);
155 } else if (fp->f_type == DTYPE_PTS) {
156 struct tty *tp = fp->f_data;
157
158 /* Convert the numbers for the slave device. */
159 if (linux_driver_get_major_minor(devtoname(tp->t_dev),
160 &major, &minor) == 0) {
161 buf->st_rdev = (major << 8 | minor);
162 }
163 }
164 fdrop(fp, td);
165 }
166
167 static int
newstat_copyout(struct stat * buf,void * ubuf)168 newstat_copyout(struct stat *buf, void *ubuf)
169 {
170 struct l_newstat tbuf;
171
172 bzero(&tbuf, sizeof(tbuf));
173 tbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
174 tbuf.st_ino = buf->st_ino;
175 tbuf.st_mode = buf->st_mode;
176 tbuf.st_nlink = buf->st_nlink;
177 tbuf.st_uid = buf->st_uid;
178 tbuf.st_gid = buf->st_gid;
179 tbuf.st_rdev = buf->st_rdev;
180 tbuf.st_size = buf->st_size;
181 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
182 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
183 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
184 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
185 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
186 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
187 tbuf.st_blksize = buf->st_blksize;
188 tbuf.st_blocks = buf->st_blocks;
189
190 return (copyout(&tbuf, ubuf, sizeof(tbuf)));
191 }
192
193 int
linux_newstat(struct thread * td,struct linux_newstat_args * args)194 linux_newstat(struct thread *td, struct linux_newstat_args *args)
195 {
196 struct stat buf;
197 char *path;
198 int error;
199
200 LCONVPATHEXIST(td, args->path, &path);
201
202 #ifdef DEBUG
203 if (ldebug(newstat))
204 printf(ARGS(newstat, "%s, *"), path);
205 #endif
206
207 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
208 LFREEPATH(path);
209 if (error)
210 return (error);
211 return (newstat_copyout(&buf, args->buf));
212 }
213
214 int
linux_newlstat(struct thread * td,struct linux_newlstat_args * args)215 linux_newlstat(struct thread *td, struct linux_newlstat_args *args)
216 {
217 struct stat sb;
218 char *path;
219 int error;
220
221 LCONVPATHEXIST(td, args->path, &path);
222
223 #ifdef DEBUG
224 if (ldebug(newlstat))
225 printf(ARGS(newlstat, "%s, *"), path);
226 #endif
227
228 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb);
229 LFREEPATH(path);
230 if (error)
231 return (error);
232 return (newstat_copyout(&sb, args->buf));
233 }
234
235 int
linux_newfstat(struct thread * td,struct linux_newfstat_args * args)236 linux_newfstat(struct thread *td, struct linux_newfstat_args *args)
237 {
238 struct stat buf;
239 int error;
240
241 #ifdef DEBUG
242 if (ldebug(newfstat))
243 printf(ARGS(newfstat, "%d, *"), args->fd);
244 #endif
245
246 error = kern_fstat(td, args->fd, &buf);
247 translate_fd_major_minor(td, args->fd, &buf);
248 if (!error)
249 error = newstat_copyout(&buf, args->buf);
250
251 return (error);
252 }
253
254 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
255 static int
stat_copyout(struct stat * buf,void * ubuf)256 stat_copyout(struct stat *buf, void *ubuf)
257 {
258 struct l_stat lbuf;
259
260 bzero(&lbuf, sizeof(lbuf));
261 lbuf.st_dev = buf->st_dev;
262 lbuf.st_ino = buf->st_ino;
263 lbuf.st_mode = buf->st_mode;
264 lbuf.st_nlink = buf->st_nlink;
265 lbuf.st_uid = buf->st_uid;
266 lbuf.st_gid = buf->st_gid;
267 lbuf.st_rdev = buf->st_rdev;
268 if (buf->st_size < (quad_t)1 << 32)
269 lbuf.st_size = buf->st_size;
270 else
271 lbuf.st_size = -2;
272 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
273 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
274 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
275 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
276 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
277 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
278 lbuf.st_blksize = buf->st_blksize;
279 lbuf.st_blocks = buf->st_blocks;
280 lbuf.st_flags = buf->st_flags;
281 lbuf.st_gen = buf->st_gen;
282
283 return (copyout(&lbuf, ubuf, sizeof(lbuf)));
284 }
285
286 int
linux_stat(struct thread * td,struct linux_stat_args * args)287 linux_stat(struct thread *td, struct linux_stat_args *args)
288 {
289 struct stat buf;
290 char *path;
291 int error;
292
293 LCONVPATHEXIST(td, args->path, &path);
294
295 #ifdef DEBUG
296 if (ldebug(stat))
297 printf(ARGS(stat, "%s, *"), path);
298 #endif
299 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
300 if (error) {
301 LFREEPATH(path);
302 return (error);
303 }
304 LFREEPATH(path);
305 return (stat_copyout(&buf, args->up));
306 }
307
308 int
linux_lstat(struct thread * td,struct linux_lstat_args * args)309 linux_lstat(struct thread *td, struct linux_lstat_args *args)
310 {
311 struct stat buf;
312 char *path;
313 int error;
314
315 LCONVPATHEXIST(td, args->path, &path);
316
317 #ifdef DEBUG
318 if (ldebug(lstat))
319 printf(ARGS(lstat, "%s, *"), path);
320 #endif
321 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf);
322 if (error) {
323 LFREEPATH(path);
324 return (error);
325 }
326 LFREEPATH(path);
327 return (stat_copyout(&buf, args->up));
328 }
329 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
330
331 struct l_statfs {
332 l_long f_type;
333 l_long f_bsize;
334 l_long f_blocks;
335 l_long f_bfree;
336 l_long f_bavail;
337 l_long f_files;
338 l_long f_ffree;
339 l_fsid_t f_fsid;
340 l_long f_namelen;
341 l_long f_spare[6];
342 };
343
344 #define LINUX_CODA_SUPER_MAGIC 0x73757245L
345 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L
346 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L
347 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L
348 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L
349 #define LINUX_NCP_SUPER_MAGIC 0x564cL
350 #define LINUX_NFS_SUPER_MAGIC 0x6969L
351 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL
352 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L
353 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */
354 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1
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 {"zfs", LINUX_ZFS_SUPER_MAGIC},
365 {"cd9660", LINUX_ISOFS_SUPER_MAGIC},
366 {"nfs", LINUX_NFS_SUPER_MAGIC},
367 {"ext2fs", LINUX_EXT2_SUPER_MAGIC},
368 {"procfs", LINUX_PROC_SUPER_MAGIC},
369 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC},
370 {"ntfs", LINUX_NTFS_SUPER_MAGIC},
371 {"nwfs", LINUX_NCP_SUPER_MAGIC},
372 {"hpfs", LINUX_HPFS_SUPER_MAGIC},
373 {"coda", LINUX_CODA_SUPER_MAGIC},
374 {"devfs", LINUX_DEVFS_SUPER_MAGIC},
375 {"tmpfs", LINUX_SHMFS_MAGIC},
376 {NULL, 0L}};
377
378 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++)
379 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0)
380 return (b2l_tbl[i].linux_type);
381
382 return (0L);
383 }
384
385 static int
bsd_to_linux_statfs(struct statfs * bsd_statfs,struct l_statfs * linux_statfs)386 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs)
387 {
388 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
389 uint64_t tmp;
390
391 #define LINUX_HIBITS 0xffffffff00000000ULL
392
393 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files |
394 bsd_statfs->f_bsize;
395 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) ||
396 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) ||
397 (tmp & LINUX_HIBITS))
398 return (EOVERFLOW);
399 #undef LINUX_HIBITS
400 #endif
401 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
402 linux_statfs->f_bsize = bsd_statfs->f_bsize;
403 linux_statfs->f_blocks = bsd_statfs->f_blocks;
404 linux_statfs->f_bfree = bsd_statfs->f_bfree;
405 linux_statfs->f_bavail = bsd_statfs->f_bavail;
406 linux_statfs->f_ffree = bsd_statfs->f_ffree;
407 linux_statfs->f_files = bsd_statfs->f_files;
408 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
409 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
410 linux_statfs->f_namelen = MAXNAMLEN;
411
412 return (0);
413 }
414
415 int
linux_statfs(struct thread * td,struct linux_statfs_args * args)416 linux_statfs(struct thread *td, struct linux_statfs_args *args)
417 {
418 struct l_statfs linux_statfs;
419 struct statfs bsd_statfs;
420 char *path;
421 int error;
422
423 LCONVPATHEXIST(td, args->path, &path);
424
425 #ifdef DEBUG
426 if (ldebug(statfs))
427 printf(ARGS(statfs, "%s, *"), path);
428 #endif
429 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
430 LFREEPATH(path);
431 if (error)
432 return (error);
433 error = bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
434 if (error)
435 return (error);
436 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
437 }
438
439 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
440 static void
bsd_to_linux_statfs64(struct statfs * bsd_statfs,struct l_statfs64 * linux_statfs)441 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs)
442 {
443
444 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
445 linux_statfs->f_bsize = bsd_statfs->f_bsize;
446 linux_statfs->f_blocks = bsd_statfs->f_blocks;
447 linux_statfs->f_bfree = bsd_statfs->f_bfree;
448 linux_statfs->f_bavail = bsd_statfs->f_bavail;
449 linux_statfs->f_ffree = bsd_statfs->f_ffree;
450 linux_statfs->f_files = bsd_statfs->f_files;
451 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
452 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
453 linux_statfs->f_namelen = MAXNAMLEN;
454 }
455
456 int
linux_statfs64(struct thread * td,struct linux_statfs64_args * args)457 linux_statfs64(struct thread *td, struct linux_statfs64_args *args)
458 {
459 struct l_statfs64 linux_statfs;
460 struct statfs bsd_statfs;
461 char *path;
462 int error;
463
464 if (args->bufsize != sizeof(struct l_statfs64))
465 return EINVAL;
466
467 LCONVPATHEXIST(td, args->path, &path);
468
469 #ifdef DEBUG
470 if (ldebug(statfs64))
471 printf(ARGS(statfs64, "%s, *"), path);
472 #endif
473 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
474 LFREEPATH(path);
475 if (error)
476 return (error);
477 bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs);
478 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
479 }
480
481 int
linux_fstatfs64(struct thread * td,struct linux_fstatfs64_args * args)482 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args)
483 {
484 struct l_statfs64 linux_statfs;
485 struct statfs bsd_statfs;
486 int error;
487
488 #ifdef DEBUG
489 if (ldebug(fstatfs64))
490 printf(ARGS(fstatfs64, "%d, *"), args->fd);
491 #endif
492 if (args->bufsize != sizeof(struct l_statfs64))
493 return (EINVAL);
494
495 error = kern_fstatfs(td, args->fd, &bsd_statfs);
496 if (error)
497 return error;
498 bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs);
499 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs)));
500 }
501 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
502
503 int
linux_fstatfs(struct thread * td,struct linux_fstatfs_args * args)504 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args)
505 {
506 struct l_statfs linux_statfs;
507 struct statfs bsd_statfs;
508 int error;
509
510 #ifdef DEBUG
511 if (ldebug(fstatfs))
512 printf(ARGS(fstatfs, "%d, *"), args->fd);
513 #endif
514 error = kern_fstatfs(td, args->fd, &bsd_statfs);
515 if (error)
516 return (error);
517 error = bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
518 if (error)
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 int
linux_ustat(struct thread * td,struct linux_ustat_args * args)532 linux_ustat(struct thread *td, struct linux_ustat_args *args)
533 {
534 #ifdef DEBUG
535 if (ldebug(ustat))
536 printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev);
537 #endif
538
539 return (EOPNOTSUPP);
540 }
541
542 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
543
544 static int
stat64_copyout(struct stat * buf,void * ubuf)545 stat64_copyout(struct stat *buf, void *ubuf)
546 {
547 struct l_stat64 lbuf;
548
549 bzero(&lbuf, sizeof(lbuf));
550 lbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
551 lbuf.st_ino = buf->st_ino;
552 lbuf.st_mode = buf->st_mode;
553 lbuf.st_nlink = buf->st_nlink;
554 lbuf.st_uid = buf->st_uid;
555 lbuf.st_gid = buf->st_gid;
556 lbuf.st_rdev = buf->st_rdev;
557 lbuf.st_size = buf->st_size;
558 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
559 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
560 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
561 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
562 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
563 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
564 lbuf.st_blksize = buf->st_blksize;
565 lbuf.st_blocks = buf->st_blocks;
566
567 /*
568 * The __st_ino field makes all the difference. In the Linux kernel
569 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO,
570 * but without the assignment to __st_ino the runtime linker refuses
571 * to mmap(2) any shared libraries. I guess it's broken alright :-)
572 */
573 lbuf.__st_ino = buf->st_ino;
574
575 return (copyout(&lbuf, ubuf, sizeof(lbuf)));
576 }
577
578 int
linux_stat64(struct thread * td,struct linux_stat64_args * args)579 linux_stat64(struct thread *td, struct linux_stat64_args *args)
580 {
581 struct stat buf;
582 char *filename;
583 int error;
584
585 LCONVPATHEXIST(td, args->filename, &filename);
586
587 #ifdef DEBUG
588 if (ldebug(stat64))
589 printf(ARGS(stat64, "%s, *"), filename);
590 #endif
591
592 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf);
593 LFREEPATH(filename);
594 if (error)
595 return (error);
596 return (stat64_copyout(&buf, args->statbuf));
597 }
598
599 int
linux_lstat64(struct thread * td,struct linux_lstat64_args * args)600 linux_lstat64(struct thread *td, struct linux_lstat64_args *args)
601 {
602 struct stat sb;
603 char *filename;
604 int error;
605
606 LCONVPATHEXIST(td, args->filename, &filename);
607
608 #ifdef DEBUG
609 if (ldebug(lstat64))
610 printf(ARGS(lstat64, "%s, *"), args->filename);
611 #endif
612
613 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb);
614 LFREEPATH(filename);
615 if (error)
616 return (error);
617 return (stat64_copyout(&sb, args->statbuf));
618 }
619
620 int
linux_fstat64(struct thread * td,struct linux_fstat64_args * args)621 linux_fstat64(struct thread *td, struct linux_fstat64_args *args)
622 {
623 struct stat buf;
624 int error;
625
626 #ifdef DEBUG
627 if (ldebug(fstat64))
628 printf(ARGS(fstat64, "%d, *"), args->fd);
629 #endif
630
631 error = kern_fstat(td, args->fd, &buf);
632 translate_fd_major_minor(td, args->fd, &buf);
633 if (!error)
634 error = stat64_copyout(&buf, args->statbuf);
635
636 return (error);
637 }
638
639 int
linux_fstatat64(struct thread * td,struct linux_fstatat64_args * args)640 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args)
641 {
642 char *path;
643 int error, dfd, flag;
644 struct stat buf;
645
646 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
647 return (EINVAL);
648 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
649 AT_SYMLINK_NOFOLLOW : 0;
650
651 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
652 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
653
654 #ifdef DEBUG
655 if (ldebug(fstatat64))
656 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag);
657 #endif
658
659 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
660 if (!error)
661 error = stat64_copyout(&buf, args->statbuf);
662 LFREEPATH(path);
663
664 return (error);
665 }
666
667 #else /* __amd64__ && !COMPAT_LINUX32 */
668
669 int
linux_newfstatat(struct thread * td,struct linux_newfstatat_args * args)670 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args)
671 {
672 char *path;
673 int error, dfd, flag;
674 struct stat buf;
675
676 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
677 return (EINVAL);
678 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
679 AT_SYMLINK_NOFOLLOW : 0;
680
681 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
682 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
683
684 #ifdef DEBUG
685 if (ldebug(newfstatat))
686 printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag);
687 #endif
688
689 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
690 if (error == 0)
691 error = newstat_copyout(&buf, args->statbuf);
692 LFREEPATH(path);
693
694 return (error);
695 }
696
697 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
698
699 int
linux_syncfs(struct thread * td,struct linux_syncfs_args * args)700 linux_syncfs(struct thread *td, struct linux_syncfs_args *args)
701 {
702 cap_rights_t rights;
703 struct mount *mp;
704 struct vnode *vp;
705 int error, save;
706
707 error = fgetvp(td, args->fd, cap_rights_init(&rights, CAP_FSYNC), &vp);
708 if (error != 0)
709 /*
710 * Linux syncfs() returns only EBADF, however fgetvp()
711 * can return EINVAL in case of file descriptor does
712 * not represent a vnode. XXX.
713 */
714 return (error);
715
716 mp = vp->v_mount;
717 mtx_lock(&mountlist_mtx);
718 error = vfs_busy(mp, MBF_MNTLSTLOCK);
719 if (error != 0) {
720 /* See comment above. */
721 mtx_unlock(&mountlist_mtx);
722 goto out;
723 }
724 if ((mp->mnt_flag & MNT_RDONLY) == 0 &&
725 vn_start_write(NULL, &mp, V_NOWAIT) == 0) {
726 save = curthread_pflags_set(TDP_SYNCIO);
727 vfs_msync(mp, MNT_NOWAIT);
728 VFS_SYNC(mp, MNT_NOWAIT);
729 curthread_pflags_restore(save);
730 vn_finished_write(mp);
731 }
732 vfs_unbusy(mp);
733
734 out:
735 vrele(vp);
736 return (error);
737 }
738