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_file.c 320469 2017-06-29 12:49:03Z avg $");
31
32 #include "opt_compat.h"
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/capsicum.h>
37 #include <sys/conf.h>
38 #include <sys/dirent.h>
39 #include <sys/fcntl.h>
40 #include <sys/file.h>
41 #include <sys/filedesc.h>
42 #include <sys/lock.h>
43 #include <sys/malloc.h>
44 #include <sys/mount.h>
45 #include <sys/mutex.h>
46 #include <sys/namei.h>
47 #include <sys/proc.h>
48 #include <sys/stat.h>
49 #include <sys/sx.h>
50 #include <sys/syscallsubr.h>
51 #include <sys/sysproto.h>
52 #include <sys/tty.h>
53 #include <sys/unistd.h>
54 #include <sys/vnode.h>
55
56 #ifdef COMPAT_LINUX32
57 #include <machine/../linux32/linux.h>
58 #include <machine/../linux32/linux32_proto.h>
59 #else
60 #include <machine/../linux/linux.h>
61 #include <machine/../linux/linux_proto.h>
62 #endif
63 #include <compat/linux/linux_misc.h>
64 #include <compat/linux/linux_util.h>
65 #include <compat/linux/linux_file.h>
66
67 static int linux_common_open(struct thread *, int, char *, int, int);
68 static int linux_getdents_error(struct thread *, int, int);
69
70
71 int
72 linux_creat(struct thread *td, struct linux_creat_args *args)
73 {
74 char *path;
75 int error;
76
77 LCONVPATHEXIST(td, args->path, &path);
78 #ifdef DEBUG
79 if (ldebug(creat))
80 printf(ARGS(creat, "%s, %d"), path, args->mode);
81 #endif
82 error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE,
83 O_WRONLY | O_CREAT | O_TRUNC, args->mode);
84 LFREEPATH(path);
85 return (error);
86 }
87
88
89 static int
90 linux_common_open(struct thread *td, int dirfd, char *path, int l_flags, int mode)
91 {
92 cap_rights_t rights;
93 struct proc *p = td->td_proc;
94 struct file *fp;
95 int fd;
96 int bsd_flags, error;
97
98 bsd_flags = 0;
99 switch (l_flags & LINUX_O_ACCMODE) {
100 case LINUX_O_WRONLY:
101 bsd_flags |= O_WRONLY;
102 break;
103 case LINUX_O_RDWR:
104 bsd_flags |= O_RDWR;
105 break;
106 default:
107 bsd_flags |= O_RDONLY;
108 }
109 if (l_flags & LINUX_O_NDELAY)
110 bsd_flags |= O_NONBLOCK;
111 if (l_flags & LINUX_O_APPEND)
112 bsd_flags |= O_APPEND;
113 if (l_flags & LINUX_O_SYNC)
114 bsd_flags |= O_FSYNC;
115 if (l_flags & LINUX_O_NONBLOCK)
116 bsd_flags |= O_NONBLOCK;
117 if (l_flags & LINUX_FASYNC)
118 bsd_flags |= O_ASYNC;
119 if (l_flags & LINUX_O_CREAT)
120 bsd_flags |= O_CREAT;
121 if (l_flags & LINUX_O_TRUNC)
122 bsd_flags |= O_TRUNC;
123 if (l_flags & LINUX_O_EXCL)
124 bsd_flags |= O_EXCL;
125 if (l_flags & LINUX_O_NOCTTY)
126 bsd_flags |= O_NOCTTY;
127 if (l_flags & LINUX_O_DIRECT)
128 bsd_flags |= O_DIRECT;
129 if (l_flags & LINUX_O_NOFOLLOW)
130 bsd_flags |= O_NOFOLLOW;
131 if (l_flags & LINUX_O_DIRECTORY)
132 bsd_flags |= O_DIRECTORY;
133 /* XXX LINUX_O_NOATIME: unable to be easily implemented. */
134
135 error = kern_openat(td, dirfd, path, UIO_SYSSPACE, bsd_flags, mode);
136 if (error != 0)
137 goto done;
138 if (bsd_flags & O_NOCTTY)
139 goto done;
140
141 /*
142 * XXX In between kern_open() and fget(), another process
143 * having the same filedesc could use that fd without
144 * checking below.
145 */
146 fd = td->td_retval[0];
147 if (fget(td, fd, cap_rights_init(&rights, CAP_IOCTL), &fp) == 0) {
148 if (fp->f_type != DTYPE_VNODE) {
149 fdrop(fp, td);
150 goto done;
151 }
152 sx_slock(&proctree_lock);
153 PROC_LOCK(p);
154 if (SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
155 PROC_UNLOCK(p);
156 sx_sunlock(&proctree_lock);
157 /* XXXPJD: Verify if TIOCSCTTY is allowed. */
158 (void) fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0,
159 td->td_ucred, td);
160 } else {
161 PROC_UNLOCK(p);
162 sx_sunlock(&proctree_lock);
163 }
164 fdrop(fp, td);
165 }
166
167 done:
168 #ifdef DEBUG
169 if (ldebug(open))
170 printf(LMSG("open returns error %d"), error);
171 #endif
172 LFREEPATH(path);
173 return (error);
174 }
175
176 int
177 linux_openat(struct thread *td, struct linux_openat_args *args)
178 {
179 char *path;
180 int dfd;
181
182 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
183 if (args->flags & LINUX_O_CREAT)
184 LCONVPATH_AT(td, args->filename, &path, 1, dfd);
185 else
186 LCONVPATH_AT(td, args->filename, &path, 0, dfd);
187 #ifdef DEBUG
188 if (ldebug(openat))
189 printf(ARGS(openat, "%i, %s, 0x%x, 0x%x"), args->dfd,
190 path, args->flags, args->mode);
191 #endif
192 return (linux_common_open(td, dfd, path, args->flags, args->mode));
193 }
194
195 int
196 linux_open(struct thread *td, struct linux_open_args *args)
197 {
198 char *path;
199
200 if (args->flags & LINUX_O_CREAT)
201 LCONVPATHCREAT(td, args->path, &path);
202 else
203 LCONVPATHEXIST(td, args->path, &path);
204 #ifdef DEBUG
205 if (ldebug(open))
206 printf(ARGS(open, "%s, 0x%x, 0x%x"),
207 path, args->flags, args->mode);
208 #endif
209 return (linux_common_open(td, AT_FDCWD, path, args->flags, args->mode));
210 }
211
212 int
213 linux_lseek(struct thread *td, struct linux_lseek_args *args)
214 {
215
216 #ifdef DEBUG
217 if (ldebug(lseek))
218 printf(ARGS(lseek, "%d, %ld, %d"),
219 args->fdes, (long)args->off, args->whence);
220 #endif
221 return (kern_lseek(td, args->fdes, args->off, args->whence));
222 }
223
224 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
225 int
226 linux_llseek(struct thread *td, struct linux_llseek_args *args)
227 {
228 int error;
229 off_t off;
230
231 #ifdef DEBUG
232 if (ldebug(llseek))
233 printf(ARGS(llseek, "%d, %d:%d, %d"),
234 args->fd, args->ohigh, args->olow, args->whence);
235 #endif
236 off = (args->olow) | (((off_t) args->ohigh) << 32);
237
238 error = kern_lseek(td, args->fd, off, args->whence);
239 if (error != 0)
240 return (error);
241
242 error = copyout(td->td_retval, args->res, sizeof(off_t));
243 if (error != 0)
244 return (error);
245
246 td->td_retval[0] = 0;
247 return (0);
248 }
249 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
250
251 /*
252 * Note that linux_getdents(2) and linux_getdents64(2) have the same
253 * arguments. They only differ in the definition of struct dirent they
254 * operate on.
255 * Note that linux_readdir(2) is a special case of linux_getdents(2)
256 * where count is always equals 1, meaning that the buffer is one
257 * dirent-structure in size and that the code can't handle more anyway.
258 * Note that linux_readdir(2) can't be implemented by means of linux_getdents(2)
259 * as in case when the *dent buffer size is equal to 1 linux_getdents(2) will
260 * trash user stack.
261 */
262
263 static int
264 linux_getdents_error(struct thread *td, int fd, int err)
265 {
266 cap_rights_t rights;
267 struct vnode *vp;
268 struct file *fp;
269 int error;
270
271 /* Linux return ENOTDIR in case when fd is not a directory. */
272 error = getvnode(td, fd, cap_rights_init(&rights, CAP_READ), &fp);
273 if (error != 0)
274 return (error);
275 vp = fp->f_vnode;
276 if (vp->v_type != VDIR) {
277 fdrop(fp, td);
278 return (ENOTDIR);
279 }
280 fdrop(fp, td);
281 return (err);
282 }
283
284 struct l_dirent {
285 l_ulong d_ino;
286 l_off_t d_off;
287 l_ushort d_reclen;
288 char d_name[LINUX_NAME_MAX + 1];
289 };
290
291 struct l_dirent64 {
292 uint64_t d_ino;
293 int64_t d_off;
294 l_ushort d_reclen;
295 u_char d_type;
296 char d_name[LINUX_NAME_MAX + 1];
297 };
298
299 /*
300 * Linux uses the last byte in the dirent buffer to store d_type,
301 * at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes.
302 */
303 #define LINUX_RECLEN(namlen) \
304 roundup(offsetof(struct l_dirent, d_name) + (namlen) + 2, sizeof(l_ulong))
305
306 #define LINUX_RECLEN64(namlen) \
307 roundup(offsetof(struct l_dirent64, d_name) + (namlen) + 1, \
308 sizeof(uint64_t))
309
310 #define LINUX_DIRBLKSIZ 512
311
312 /*
313 * Linux l_dirent is bigger than FreeBSD dirent, thus the buffer size
314 * passed to kern_getdirentries() must be smaller than the one passed
315 * to linux_getdents() by certain factor.
316 */
317 #define LINUX_RECLEN_RATIO(X) X * offsetof(struct dirent, d_name) / \
318 offsetof(struct l_dirent, d_name);
319 #define LINUX_RECLEN64_RATIO(X) X * offsetof(struct dirent, d_name) / \
320 offsetof(struct l_dirent64, d_name);
321
322 int
323 linux_getdents(struct thread *td, struct linux_getdents_args *args)
324 {
325 struct dirent *bdp;
326 caddr_t inp, buf; /* BSD-format */
327 int len, reclen; /* BSD-format */
328 caddr_t outp; /* Linux-format */
329 int resid, linuxreclen; /* Linux-format */
330 caddr_t lbuf; /* Linux-format */
331 long base;
332 struct l_dirent *linux_dirent;
333 int buflen, error;
334 size_t retval;
335
336 #ifdef DEBUG
337 if (ldebug(getdents))
338 printf(ARGS(getdents, "%d, *, %d"), args->fd, args->count);
339 #endif
340 buflen = LINUX_RECLEN_RATIO(args->count);
341 buflen = min(buflen, MAXBSIZE);
342 buf = malloc(buflen, M_TEMP, M_WAITOK);
343
344 error = kern_getdirentries(td, args->fd, buf, buflen,
345 &base, NULL, UIO_SYSSPACE);
346 if (error != 0) {
347 error = linux_getdents_error(td, args->fd, error);
348 goto out1;
349 }
350
351 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO);
352
353 len = td->td_retval[0];
354 inp = buf;
355 outp = (caddr_t)args->dent;
356 resid = args->count;
357 retval = 0;
358
359 while (len > 0) {
360 bdp = (struct dirent *) inp;
361 reclen = bdp->d_reclen;
362 linuxreclen = LINUX_RECLEN(bdp->d_namlen);
363 /*
364 * No more space in the user supplied dirent buffer.
365 * Return EINVAL.
366 */
367 if (resid < linuxreclen) {
368 error = EINVAL;
369 goto out;
370 }
371
372 linux_dirent = (struct l_dirent*)lbuf;
373 linux_dirent->d_ino = bdp->d_fileno;
374 linux_dirent->d_off = base + reclen;
375 linux_dirent->d_reclen = linuxreclen;
376 /*
377 * Copy d_type to last byte of l_dirent buffer
378 */
379 lbuf[linuxreclen - 1] = bdp->d_type;
380 strlcpy(linux_dirent->d_name, bdp->d_name,
381 linuxreclen - offsetof(struct l_dirent, d_name)-1);
382 error = copyout(linux_dirent, outp, linuxreclen);
383 if (error != 0)
384 goto out;
385
386 inp += reclen;
387 base += reclen;
388 len -= reclen;
389
390 retval += linuxreclen;
391 outp += linuxreclen;
392 resid -= linuxreclen;
393 }
394 td->td_retval[0] = retval;
395
396 out:
397 free(lbuf, M_TEMP);
398 out1:
399 free(buf, M_TEMP);
400 return (error);
401 }
402
403 int
404 linux_getdents64(struct thread *td, struct linux_getdents64_args *args)
405 {
406 struct dirent *bdp;
407 caddr_t inp, buf; /* BSD-format */
408 int len, reclen; /* BSD-format */
409 caddr_t outp; /* Linux-format */
410 int resid, linuxreclen; /* Linux-format */
411 caddr_t lbuf; /* Linux-format */
412 long base;
413 struct l_dirent64 *linux_dirent64;
414 int buflen, error;
415 size_t retval;
416
417 #ifdef DEBUG
418 if (ldebug(getdents64))
419 uprintf(ARGS(getdents64, "%d, *, %d"), args->fd, args->count);
420 #endif
421 buflen = LINUX_RECLEN64_RATIO(args->count);
422 buflen = min(buflen, MAXBSIZE);
423 buf = malloc(buflen, M_TEMP, M_WAITOK);
424
425 error = kern_getdirentries(td, args->fd, buf, buflen,
426 &base, NULL, UIO_SYSSPACE);
427 if (error != 0) {
428 error = linux_getdents_error(td, args->fd, error);
429 goto out1;
430 }
431
432 lbuf = malloc(LINUX_RECLEN64(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO);
433
434 len = td->td_retval[0];
435 inp = buf;
436 outp = (caddr_t)args->dirent;
437 resid = args->count;
438 retval = 0;
439
440 while (len > 0) {
441 bdp = (struct dirent *) inp;
442 reclen = bdp->d_reclen;
443 linuxreclen = LINUX_RECLEN64(bdp->d_namlen);
444 /*
445 * No more space in the user supplied dirent buffer.
446 * Return EINVAL.
447 */
448 if (resid < linuxreclen) {
449 error = EINVAL;
450 goto out;
451 }
452
453 linux_dirent64 = (struct l_dirent64*)lbuf;
454 linux_dirent64->d_ino = bdp->d_fileno;
455 linux_dirent64->d_off = base + reclen;
456 linux_dirent64->d_reclen = linuxreclen;
457 linux_dirent64->d_type = bdp->d_type;
458 strlcpy(linux_dirent64->d_name, bdp->d_name,
459 linuxreclen - offsetof(struct l_dirent64, d_name));
460 error = copyout(linux_dirent64, outp, linuxreclen);
461 if (error != 0)
462 goto out;
463
464 inp += reclen;
465 base += reclen;
466 len -= reclen;
467
468 retval += linuxreclen;
469 outp += linuxreclen;
470 resid -= linuxreclen;
471 }
472 td->td_retval[0] = retval;
473
474 out:
475 free(lbuf, M_TEMP);
476 out1:
477 free(buf, M_TEMP);
478 return (error);
479 }
480
481 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
482 int
483 linux_readdir(struct thread *td, struct linux_readdir_args *args)
484 {
485 struct dirent *bdp;
486 caddr_t buf; /* BSD-format */
487 int linuxreclen; /* Linux-format */
488 caddr_t lbuf; /* Linux-format */
489 long base;
490 struct l_dirent *linux_dirent;
491 int buflen, error;
492
493 #ifdef DEBUG
494 if (ldebug(readdir))
495 printf(ARGS(readdir, "%d, *"), args->fd);
496 #endif
497 buflen = LINUX_RECLEN(LINUX_NAME_MAX);
498 buflen = LINUX_RECLEN_RATIO(buflen);
499 buf = malloc(buflen, M_TEMP, M_WAITOK);
500
501 error = kern_getdirentries(td, args->fd, buf, buflen,
502 &base, NULL, UIO_SYSSPACE);
503 if (error != 0) {
504 error = linux_getdents_error(td, args->fd, error);
505 goto out;
506 }
507 if (td->td_retval[0] == 0)
508 goto out;
509
510 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO);
511
512 bdp = (struct dirent *) buf;
513 linuxreclen = LINUX_RECLEN(bdp->d_namlen);
514
515 linux_dirent = (struct l_dirent*)lbuf;
516 linux_dirent->d_ino = bdp->d_fileno;
517 linux_dirent->d_off = linuxreclen;
518 linux_dirent->d_reclen = bdp->d_namlen;
519 strlcpy(linux_dirent->d_name, bdp->d_name,
520 linuxreclen - offsetof(struct l_dirent, d_name));
521 error = copyout(linux_dirent, args->dent, linuxreclen);
522 if (error == 0)
523 td->td_retval[0] = linuxreclen;
524
525 free(lbuf, M_TEMP);
526 out:
527 free(buf, M_TEMP);
528 return (error);
529 }
530 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
531
532
533 /*
534 * These exist mainly for hooks for doing /compat/linux translation.
535 */
536
537 int
538 linux_access(struct thread *td, struct linux_access_args *args)
539 {
540 char *path;
541 int error;
542
543 /* linux convention */
544 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
545 return (EINVAL);
546
547 LCONVPATHEXIST(td, args->path, &path);
548
549 #ifdef DEBUG
550 if (ldebug(access))
551 printf(ARGS(access, "%s, %d"), path, args->amode);
552 #endif
553 error = kern_accessat(td, AT_FDCWD, path, UIO_SYSSPACE, 0,
554 args->amode);
555 LFREEPATH(path);
556
557 return (error);
558 }
559
560 int
561 linux_faccessat(struct thread *td, struct linux_faccessat_args *args)
562 {
563 char *path;
564 int error, dfd;
565
566 /* linux convention */
567 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
568 return (EINVAL);
569
570 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
571 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
572
573 #ifdef DEBUG
574 if (ldebug(access))
575 printf(ARGS(access, "%s, %d"), path, args->amode);
576 #endif
577
578 error = kern_accessat(td, dfd, path, UIO_SYSSPACE, 0, args->amode);
579 LFREEPATH(path);
580
581 return (error);
582 }
583
584 int
585 linux_unlink(struct thread *td, struct linux_unlink_args *args)
586 {
587 char *path;
588 int error;
589 struct stat st;
590
591 LCONVPATHEXIST(td, args->path, &path);
592
593 #ifdef DEBUG
594 if (ldebug(unlink))
595 printf(ARGS(unlink, "%s"), path);
596 #endif
597
598 error = kern_unlinkat(td, AT_FDCWD, path, UIO_SYSSPACE, 0);
599 if (error == EPERM) {
600 /* Introduce POSIX noncompliant behaviour of Linux */
601 if (kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE, &st,
602 NULL) == 0) {
603 if (S_ISDIR(st.st_mode))
604 error = EISDIR;
605 }
606 }
607 LFREEPATH(path);
608 return (error);
609 }
610
611 int
612 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args)
613 {
614 char *path;
615 int error, dfd;
616 struct stat st;
617
618 if (args->flag & ~LINUX_AT_REMOVEDIR)
619 return (EINVAL);
620
621 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
622 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
623
624 #ifdef DEBUG
625 if (ldebug(unlinkat))
626 printf(ARGS(unlinkat, "%s"), path);
627 #endif
628
629 if (args->flag & LINUX_AT_REMOVEDIR)
630 error = kern_rmdirat(td, dfd, path, UIO_SYSSPACE);
631 else
632 error = kern_unlinkat(td, dfd, path, UIO_SYSSPACE, 0);
633 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) {
634 /* Introduce POSIX noncompliant behaviour of Linux */
635 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path,
636 UIO_SYSSPACE, &st, NULL) == 0 && S_ISDIR(st.st_mode))
637 error = EISDIR;
638 }
639 LFREEPATH(path);
640 return (error);
641 }
642 int
643 linux_chdir(struct thread *td, struct linux_chdir_args *args)
644 {
645 char *path;
646 int error;
647
648 LCONVPATHEXIST(td, args->path, &path);
649
650 #ifdef DEBUG
651 if (ldebug(chdir))
652 printf(ARGS(chdir, "%s"), path);
653 #endif
654 error = kern_chdir(td, path, UIO_SYSSPACE);
655 LFREEPATH(path);
656 return (error);
657 }
658
659 int
660 linux_chmod(struct thread *td, struct linux_chmod_args *args)
661 {
662 char *path;
663 int error;
664
665 LCONVPATHEXIST(td, args->path, &path);
666
667 #ifdef DEBUG
668 if (ldebug(chmod))
669 printf(ARGS(chmod, "%s, %d"), path, args->mode);
670 #endif
671 error = kern_fchmodat(td, AT_FDCWD, path, UIO_SYSSPACE,
672 args->mode, 0);
673 LFREEPATH(path);
674 return (error);
675 }
676
677 int
678 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args)
679 {
680 char *path;
681 int error, dfd;
682
683 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
684 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
685
686 #ifdef DEBUG
687 if (ldebug(fchmodat))
688 printf(ARGS(fchmodat, "%s, %d"), path, args->mode);
689 #endif
690
691 error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0);
692 LFREEPATH(path);
693 return (error);
694 }
695
696 int
697 linux_mkdir(struct thread *td, struct linux_mkdir_args *args)
698 {
699 char *path;
700 int error;
701
702 LCONVPATHCREAT(td, args->path, &path);
703
704 #ifdef DEBUG
705 if (ldebug(mkdir))
706 printf(ARGS(mkdir, "%s, %d"), path, args->mode);
707 #endif
708 error = kern_mkdirat(td, AT_FDCWD, path, UIO_SYSSPACE, args->mode);
709 LFREEPATH(path);
710 return (error);
711 }
712
713 int
714 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args)
715 {
716 char *path;
717 int error, dfd;
718
719 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
720 LCONVPATHCREAT_AT(td, args->pathname, &path, dfd);
721
722 #ifdef DEBUG
723 if (ldebug(mkdirat))
724 printf(ARGS(mkdirat, "%s, %d"), path, args->mode);
725 #endif
726 error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode);
727 LFREEPATH(path);
728 return (error);
729 }
730
731 int
732 linux_rmdir(struct thread *td, struct linux_rmdir_args *args)
733 {
734 char *path;
735 int error;
736
737 LCONVPATHEXIST(td, args->path, &path);
738
739 #ifdef DEBUG
740 if (ldebug(rmdir))
741 printf(ARGS(rmdir, "%s"), path);
742 #endif
743 error = kern_rmdirat(td, AT_FDCWD, path, UIO_SYSSPACE);
744 LFREEPATH(path);
745 return (error);
746 }
747
748 int
749 linux_rename(struct thread *td, struct linux_rename_args *args)
750 {
751 char *from, *to;
752 int error;
753
754 LCONVPATHEXIST(td, args->from, &from);
755 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
756 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
757 if (to == NULL) {
758 LFREEPATH(from);
759 return (error);
760 }
761
762 #ifdef DEBUG
763 if (ldebug(rename))
764 printf(ARGS(rename, "%s, %s"), from, to);
765 #endif
766 error = kern_renameat(td, AT_FDCWD, from, AT_FDCWD, to, UIO_SYSSPACE);
767 LFREEPATH(from);
768 LFREEPATH(to);
769 return (error);
770 }
771
772 int
773 linux_renameat(struct thread *td, struct linux_renameat_args *args)
774 {
775 char *from, *to;
776 int error, olddfd, newdfd;
777
778 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
779 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
780 LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd);
781 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
782 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
783 if (to == NULL) {
784 LFREEPATH(from);
785 return (error);
786 }
787
788 #ifdef DEBUG
789 if (ldebug(renameat))
790 printf(ARGS(renameat, "%s, %s"), from, to);
791 #endif
792 error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE);
793 LFREEPATH(from);
794 LFREEPATH(to);
795 return (error);
796 }
797
798 int
799 linux_symlink(struct thread *td, struct linux_symlink_args *args)
800 {
801 char *path, *to;
802 int error;
803
804 LCONVPATHEXIST(td, args->path, &path);
805 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
806 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
807 if (to == NULL) {
808 LFREEPATH(path);
809 return (error);
810 }
811
812 #ifdef DEBUG
813 if (ldebug(symlink))
814 printf(ARGS(symlink, "%s, %s"), path, to);
815 #endif
816 error = kern_symlinkat(td, path, AT_FDCWD, to, UIO_SYSSPACE);
817 LFREEPATH(path);
818 LFREEPATH(to);
819 return (error);
820 }
821
822 int
823 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args)
824 {
825 char *path, *to;
826 int error, dfd;
827
828 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
829 LCONVPATHEXIST(td, args->oldname, &path);
830 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
831 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd);
832 if (to == NULL) {
833 LFREEPATH(path);
834 return (error);
835 }
836
837 #ifdef DEBUG
838 if (ldebug(symlinkat))
839 printf(ARGS(symlinkat, "%s, %s"), path, to);
840 #endif
841
842 error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE);
843 LFREEPATH(path);
844 LFREEPATH(to);
845 return (error);
846 }
847
848 int
849 linux_readlink(struct thread *td, struct linux_readlink_args *args)
850 {
851 char *name;
852 int error;
853
854 LCONVPATHEXIST(td, args->name, &name);
855
856 #ifdef DEBUG
857 if (ldebug(readlink))
858 printf(ARGS(readlink, "%s, %p, %d"), name, (void *)args->buf,
859 args->count);
860 #endif
861 error = kern_readlinkat(td, AT_FDCWD, name, UIO_SYSSPACE,
862 args->buf, UIO_USERSPACE, args->count);
863 LFREEPATH(name);
864 return (error);
865 }
866
867 int
868 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args)
869 {
870 char *name;
871 int error, dfd;
872
873 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
874 LCONVPATHEXIST_AT(td, args->path, &name, dfd);
875
876 #ifdef DEBUG
877 if (ldebug(readlinkat))
878 printf(ARGS(readlinkat, "%s, %p, %d"), name, (void *)args->buf,
879 args->bufsiz);
880 #endif
881
882 error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf,
883 UIO_USERSPACE, args->bufsiz);
884 LFREEPATH(name);
885 return (error);
886 }
887
888 int
889 linux_truncate(struct thread *td, struct linux_truncate_args *args)
890 {
891 char *path;
892 int error;
893
894 LCONVPATHEXIST(td, args->path, &path);
895
896 #ifdef DEBUG
897 if (ldebug(truncate))
898 printf(ARGS(truncate, "%s, %ld"), path, (long)args->length);
899 #endif
900
901 error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
902 LFREEPATH(path);
903 return (error);
904 }
905
906 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
907 int
908 linux_truncate64(struct thread *td, struct linux_truncate64_args *args)
909 {
910 char *path;
911 int error;
912
913 LCONVPATHEXIST(td, args->path, &path);
914
915 #ifdef DEBUG
916 if (ldebug(truncate64))
917 printf(ARGS(truncate64, "%s, %jd"), path, args->length);
918 #endif
919
920 error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
921 LFREEPATH(path);
922 return (error);
923 }
924 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
925
926 int
927 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args)
928 {
929
930 return (kern_ftruncate(td, args->fd, args->length));
931 }
932
933 int
934 linux_link(struct thread *td, struct linux_link_args *args)
935 {
936 char *path, *to;
937 int error;
938
939 LCONVPATHEXIST(td, args->path, &path);
940 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
941 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
942 if (to == NULL) {
943 LFREEPATH(path);
944 return (error);
945 }
946
947 #ifdef DEBUG
948 if (ldebug(link))
949 printf(ARGS(link, "%s, %s"), path, to);
950 #endif
951 error = kern_linkat(td, AT_FDCWD, AT_FDCWD, path, to, UIO_SYSSPACE,
952 FOLLOW);
953 LFREEPATH(path);
954 LFREEPATH(to);
955 return (error);
956 }
957
958 int
959 linux_linkat(struct thread *td, struct linux_linkat_args *args)
960 {
961 char *path, *to;
962 int error, olddfd, newdfd, follow;
963
964 if (args->flag & ~LINUX_AT_SYMLINK_FOLLOW)
965 return (EINVAL);
966
967 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
968 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
969 LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd);
970 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
971 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
972 if (to == NULL) {
973 LFREEPATH(path);
974 return (error);
975 }
976
977 #ifdef DEBUG
978 if (ldebug(linkat))
979 printf(ARGS(linkat, "%i, %s, %i, %s, %i"), args->olddfd, path,
980 args->newdfd, to, args->flag);
981 #endif
982
983 follow = (args->flag & LINUX_AT_SYMLINK_FOLLOW) == 0 ? NOFOLLOW :
984 FOLLOW;
985 error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, follow);
986 LFREEPATH(path);
987 LFREEPATH(to);
988 return (error);
989 }
990
991 int
992 linux_fdatasync(td, uap)
993 struct thread *td;
994 struct linux_fdatasync_args *uap;
995 {
996
997 return (kern_fsync(td, uap->fd, false));
998 }
999
1000 int
1001 linux_pread(struct thread *td, struct linux_pread_args *uap)
1002 {
1003 cap_rights_t rights;
1004 struct vnode *vp;
1005 int error;
1006
1007 error = kern_pread(td, uap->fd, uap->buf, uap->nbyte, uap->offset);
1008 if (error == 0) {
1009 /* This seems to violate POSIX but linux does it */
1010 error = fgetvp(td, uap->fd,
1011 cap_rights_init(&rights, CAP_PREAD), &vp);
1012 if (error != 0)
1013 return (error);
1014 if (vp->v_type == VDIR) {
1015 vrele(vp);
1016 return (EISDIR);
1017 }
1018 vrele(vp);
1019 }
1020 return (error);
1021 }
1022
1023 int
1024 linux_pwrite(struct thread *td, struct linux_pwrite_args *uap)
1025 {
1026
1027 return (kern_pwrite(td, uap->fd, uap->buf, uap->nbyte, uap->offset));
1028 }
1029
1030 int
1031 linux_preadv(struct thread *td, struct linux_preadv_args *uap)
1032 {
1033 struct uio *auio;
1034 int error;
1035 off_t offset;
1036
1037 /*
1038 * According http://man7.org/linux/man-pages/man2/preadv.2.html#NOTES
1039 * pos_l and pos_h, respectively, contain the
1040 * low order and high order 32 bits of offset.
1041 */
1042 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) <<
1043 (sizeof(offset) * 4)) | uap->pos_l;
1044 if (offset < 0)
1045 return (EINVAL);
1046 #ifdef COMPAT_LINUX32
1047 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio);
1048 #else
1049 error = copyinuio(uap->vec, uap->vlen, &auio);
1050 #endif
1051 if (error != 0)
1052 return (error);
1053 error = kern_preadv(td, uap->fd, auio, offset);
1054 free(auio, M_IOV);
1055 return (error);
1056 }
1057
1058 int
1059 linux_pwritev(struct thread *td, struct linux_pwritev_args *uap)
1060 {
1061 struct uio *auio;
1062 int error;
1063 off_t offset;
1064
1065 /*
1066 * According http://man7.org/linux/man-pages/man2/pwritev.2.html#NOTES
1067 * pos_l and pos_h, respectively, contain the
1068 * low order and high order 32 bits of offset.
1069 */
1070 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) <<
1071 (sizeof(offset) * 4)) | uap->pos_l;
1072 if (offset < 0)
1073 return (EINVAL);
1074 #ifdef COMPAT_LINUX32
1075 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio);
1076 #else
1077 error = copyinuio(uap->vec, uap->vlen, &auio);
1078 #endif
1079 if (error != 0)
1080 return (error);
1081 error = kern_pwritev(td, uap->fd, auio, offset);
1082 free(auio, M_IOV);
1083 return (error);
1084 }
1085
1086 int
1087 linux_mount(struct thread *td, struct linux_mount_args *args)
1088 {
1089 char fstypename[MFSNAMELEN];
1090 char mntonname[MNAMELEN], mntfromname[MNAMELEN];
1091 int error;
1092 int fsflags;
1093
1094 error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1,
1095 NULL);
1096 if (error)
1097 return (error);
1098 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL);
1099 if (error)
1100 return (error);
1101 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL);
1102 if (error)
1103 return (error);
1104
1105 #ifdef DEBUG
1106 if (ldebug(mount))
1107 printf(ARGS(mount, "%s, %s, %s"),
1108 fstypename, mntfromname, mntonname);
1109 #endif
1110
1111 if (strcmp(fstypename, "ext2") == 0) {
1112 strcpy(fstypename, "ext2fs");
1113 } else if (strcmp(fstypename, "proc") == 0) {
1114 strcpy(fstypename, "linprocfs");
1115 } else if (strcmp(fstypename, "vfat") == 0) {
1116 strcpy(fstypename, "msdosfs");
1117 }
1118
1119 fsflags = 0;
1120
1121 if ((args->rwflag & 0xffff0000) == 0xc0ed0000) {
1122 /*
1123 * Linux SYNC flag is not included; the closest equivalent
1124 * FreeBSD has is !ASYNC, which is our default.
1125 */
1126 if (args->rwflag & LINUX_MS_RDONLY)
1127 fsflags |= MNT_RDONLY;
1128 if (args->rwflag & LINUX_MS_NOSUID)
1129 fsflags |= MNT_NOSUID;
1130 if (args->rwflag & LINUX_MS_NOEXEC)
1131 fsflags |= MNT_NOEXEC;
1132 if (args->rwflag & LINUX_MS_REMOUNT)
1133 fsflags |= MNT_UPDATE;
1134 }
1135
1136 error = kernel_vmount(fsflags,
1137 "fstype", fstypename,
1138 "fspath", mntonname,
1139 "from", mntfromname,
1140 NULL);
1141 return (error);
1142 }
1143
1144 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1145 int
1146 linux_oldumount(struct thread *td, struct linux_oldumount_args *args)
1147 {
1148 struct linux_umount_args args2;
1149
1150 args2.path = args->path;
1151 args2.flags = 0;
1152 return (linux_umount(td, &args2));
1153 }
1154 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1155
1156 int
1157 linux_umount(struct thread *td, struct linux_umount_args *args)
1158 {
1159 struct unmount_args bsd;
1160
1161 bsd.path = args->path;
1162 bsd.flags = args->flags; /* XXX correct? */
1163 return (sys_unmount(td, &bsd));
1164 }
1165
1166 /*
1167 * fcntl family of syscalls
1168 */
1169
1170 struct l_flock {
1171 l_short l_type;
1172 l_short l_whence;
1173 l_off_t l_start;
1174 l_off_t l_len;
1175 l_pid_t l_pid;
1176 }
1177 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1178 __packed
1179 #endif
1180 ;
1181
1182 static void
1183 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock)
1184 {
1185 switch (linux_flock->l_type) {
1186 case LINUX_F_RDLCK:
1187 bsd_flock->l_type = F_RDLCK;
1188 break;
1189 case LINUX_F_WRLCK:
1190 bsd_flock->l_type = F_WRLCK;
1191 break;
1192 case LINUX_F_UNLCK:
1193 bsd_flock->l_type = F_UNLCK;
1194 break;
1195 default:
1196 bsd_flock->l_type = -1;
1197 break;
1198 }
1199 bsd_flock->l_whence = linux_flock->l_whence;
1200 bsd_flock->l_start = (off_t)linux_flock->l_start;
1201 bsd_flock->l_len = (off_t)linux_flock->l_len;
1202 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1203 bsd_flock->l_sysid = 0;
1204 }
1205
1206 static void
1207 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock)
1208 {
1209 switch (bsd_flock->l_type) {
1210 case F_RDLCK:
1211 linux_flock->l_type = LINUX_F_RDLCK;
1212 break;
1213 case F_WRLCK:
1214 linux_flock->l_type = LINUX_F_WRLCK;
1215 break;
1216 case F_UNLCK:
1217 linux_flock->l_type = LINUX_F_UNLCK;
1218 break;
1219 }
1220 linux_flock->l_whence = bsd_flock->l_whence;
1221 linux_flock->l_start = (l_off_t)bsd_flock->l_start;
1222 linux_flock->l_len = (l_off_t)bsd_flock->l_len;
1223 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1224 }
1225
1226 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1227 struct l_flock64 {
1228 l_short l_type;
1229 l_short l_whence;
1230 l_loff_t l_start;
1231 l_loff_t l_len;
1232 l_pid_t l_pid;
1233 }
1234 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1235 __packed
1236 #endif
1237 ;
1238
1239 static void
1240 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock)
1241 {
1242 switch (linux_flock->l_type) {
1243 case LINUX_F_RDLCK:
1244 bsd_flock->l_type = F_RDLCK;
1245 break;
1246 case LINUX_F_WRLCK:
1247 bsd_flock->l_type = F_WRLCK;
1248 break;
1249 case LINUX_F_UNLCK:
1250 bsd_flock->l_type = F_UNLCK;
1251 break;
1252 default:
1253 bsd_flock->l_type = -1;
1254 break;
1255 }
1256 bsd_flock->l_whence = linux_flock->l_whence;
1257 bsd_flock->l_start = (off_t)linux_flock->l_start;
1258 bsd_flock->l_len = (off_t)linux_flock->l_len;
1259 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1260 bsd_flock->l_sysid = 0;
1261 }
1262
1263 static void
1264 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock)
1265 {
1266 switch (bsd_flock->l_type) {
1267 case F_RDLCK:
1268 linux_flock->l_type = LINUX_F_RDLCK;
1269 break;
1270 case F_WRLCK:
1271 linux_flock->l_type = LINUX_F_WRLCK;
1272 break;
1273 case F_UNLCK:
1274 linux_flock->l_type = LINUX_F_UNLCK;
1275 break;
1276 }
1277 linux_flock->l_whence = bsd_flock->l_whence;
1278 linux_flock->l_start = (l_loff_t)bsd_flock->l_start;
1279 linux_flock->l_len = (l_loff_t)bsd_flock->l_len;
1280 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1281 }
1282 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1283
1284 static int
1285 fcntl_common(struct thread *td, struct linux_fcntl_args *args)
1286 {
1287 struct l_flock linux_flock;
1288 struct flock bsd_flock;
1289 cap_rights_t rights;
1290 struct file *fp;
1291 long arg;
1292 int error, result;
1293
1294 switch (args->cmd) {
1295 case LINUX_F_DUPFD:
1296 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg));
1297
1298 case LINUX_F_GETFD:
1299 return (kern_fcntl(td, args->fd, F_GETFD, 0));
1300
1301 case LINUX_F_SETFD:
1302 return (kern_fcntl(td, args->fd, F_SETFD, args->arg));
1303
1304 case LINUX_F_GETFL:
1305 error = kern_fcntl(td, args->fd, F_GETFL, 0);
1306 result = td->td_retval[0];
1307 td->td_retval[0] = 0;
1308 if (result & O_RDONLY)
1309 td->td_retval[0] |= LINUX_O_RDONLY;
1310 if (result & O_WRONLY)
1311 td->td_retval[0] |= LINUX_O_WRONLY;
1312 if (result & O_RDWR)
1313 td->td_retval[0] |= LINUX_O_RDWR;
1314 if (result & O_NDELAY)
1315 td->td_retval[0] |= LINUX_O_NONBLOCK;
1316 if (result & O_APPEND)
1317 td->td_retval[0] |= LINUX_O_APPEND;
1318 if (result & O_FSYNC)
1319 td->td_retval[0] |= LINUX_O_SYNC;
1320 if (result & O_ASYNC)
1321 td->td_retval[0] |= LINUX_FASYNC;
1322 #ifdef LINUX_O_NOFOLLOW
1323 if (result & O_NOFOLLOW)
1324 td->td_retval[0] |= LINUX_O_NOFOLLOW;
1325 #endif
1326 #ifdef LINUX_O_DIRECT
1327 if (result & O_DIRECT)
1328 td->td_retval[0] |= LINUX_O_DIRECT;
1329 #endif
1330 return (error);
1331
1332 case LINUX_F_SETFL:
1333 arg = 0;
1334 if (args->arg & LINUX_O_NDELAY)
1335 arg |= O_NONBLOCK;
1336 if (args->arg & LINUX_O_APPEND)
1337 arg |= O_APPEND;
1338 if (args->arg & LINUX_O_SYNC)
1339 arg |= O_FSYNC;
1340 if (args->arg & LINUX_FASYNC)
1341 arg |= O_ASYNC;
1342 #ifdef LINUX_O_NOFOLLOW
1343 if (args->arg & LINUX_O_NOFOLLOW)
1344 arg |= O_NOFOLLOW;
1345 #endif
1346 #ifdef LINUX_O_DIRECT
1347 if (args->arg & LINUX_O_DIRECT)
1348 arg |= O_DIRECT;
1349 #endif
1350 return (kern_fcntl(td, args->fd, F_SETFL, arg));
1351
1352 case LINUX_F_GETLK:
1353 error = copyin((void *)args->arg, &linux_flock,
1354 sizeof(linux_flock));
1355 if (error)
1356 return (error);
1357 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1358 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1359 if (error)
1360 return (error);
1361 bsd_to_linux_flock(&bsd_flock, &linux_flock);
1362 return (copyout(&linux_flock, (void *)args->arg,
1363 sizeof(linux_flock)));
1364
1365 case LINUX_F_SETLK:
1366 error = copyin((void *)args->arg, &linux_flock,
1367 sizeof(linux_flock));
1368 if (error)
1369 return (error);
1370 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1371 return (kern_fcntl(td, args->fd, F_SETLK,
1372 (intptr_t)&bsd_flock));
1373
1374 case LINUX_F_SETLKW:
1375 error = copyin((void *)args->arg, &linux_flock,
1376 sizeof(linux_flock));
1377 if (error)
1378 return (error);
1379 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1380 return (kern_fcntl(td, args->fd, F_SETLKW,
1381 (intptr_t)&bsd_flock));
1382
1383 case LINUX_F_GETOWN:
1384 return (kern_fcntl(td, args->fd, F_GETOWN, 0));
1385
1386 case LINUX_F_SETOWN:
1387 /*
1388 * XXX some Linux applications depend on F_SETOWN having no
1389 * significant effect for pipes (SIGIO is not delivered for
1390 * pipes under Linux-2.2.35 at least).
1391 */
1392 error = fget(td, args->fd,
1393 cap_rights_init(&rights, CAP_FCNTL), &fp);
1394 if (error)
1395 return (error);
1396 if (fp->f_type == DTYPE_PIPE) {
1397 fdrop(fp, td);
1398 return (EINVAL);
1399 }
1400 fdrop(fp, td);
1401
1402 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg));
1403
1404 case LINUX_F_DUPFD_CLOEXEC:
1405 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg));
1406 }
1407
1408 return (EINVAL);
1409 }
1410
1411 int
1412 linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
1413 {
1414
1415 #ifdef DEBUG
1416 if (ldebug(fcntl))
1417 printf(ARGS(fcntl, "%d, %08x, *"), args->fd, args->cmd);
1418 #endif
1419
1420 return (fcntl_common(td, args));
1421 }
1422
1423 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1424 int
1425 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args)
1426 {
1427 struct l_flock64 linux_flock;
1428 struct flock bsd_flock;
1429 struct linux_fcntl_args fcntl_args;
1430 int error;
1431
1432 #ifdef DEBUG
1433 if (ldebug(fcntl64))
1434 printf(ARGS(fcntl64, "%d, %08x, *"), args->fd, args->cmd);
1435 #endif
1436
1437 switch (args->cmd) {
1438 case LINUX_F_GETLK64:
1439 error = copyin((void *)args->arg, &linux_flock,
1440 sizeof(linux_flock));
1441 if (error)
1442 return (error);
1443 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1444 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1445 if (error)
1446 return (error);
1447 bsd_to_linux_flock64(&bsd_flock, &linux_flock);
1448 return (copyout(&linux_flock, (void *)args->arg,
1449 sizeof(linux_flock)));
1450
1451 case LINUX_F_SETLK64:
1452 error = copyin((void *)args->arg, &linux_flock,
1453 sizeof(linux_flock));
1454 if (error)
1455 return (error);
1456 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1457 return (kern_fcntl(td, args->fd, F_SETLK,
1458 (intptr_t)&bsd_flock));
1459
1460 case LINUX_F_SETLKW64:
1461 error = copyin((void *)args->arg, &linux_flock,
1462 sizeof(linux_flock));
1463 if (error)
1464 return (error);
1465 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1466 return (kern_fcntl(td, args->fd, F_SETLKW,
1467 (intptr_t)&bsd_flock));
1468 }
1469
1470 fcntl_args.fd = args->fd;
1471 fcntl_args.cmd = args->cmd;
1472 fcntl_args.arg = args->arg;
1473 return (fcntl_common(td, &fcntl_args));
1474 }
1475 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1476
1477 int
1478 linux_chown(struct thread *td, struct linux_chown_args *args)
1479 {
1480 char *path;
1481 int error;
1482
1483 LCONVPATHEXIST(td, args->path, &path);
1484
1485 #ifdef DEBUG
1486 if (ldebug(chown))
1487 printf(ARGS(chown, "%s, %d, %d"), path, args->uid, args->gid);
1488 #endif
1489 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid,
1490 args->gid, 0);
1491 LFREEPATH(path);
1492 return (error);
1493 }
1494
1495 int
1496 linux_fchownat(struct thread *td, struct linux_fchownat_args *args)
1497 {
1498 char *path;
1499 int error, dfd, flag;
1500
1501 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
1502 return (EINVAL);
1503
1504 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
1505 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
1506
1507 #ifdef DEBUG
1508 if (ldebug(fchownat))
1509 printf(ARGS(fchownat, "%s, %d, %d"), path, args->uid, args->gid);
1510 #endif
1511
1512 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 :
1513 AT_SYMLINK_NOFOLLOW;
1514 error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid,
1515 flag);
1516 LFREEPATH(path);
1517 return (error);
1518 }
1519
1520 int
1521 linux_lchown(struct thread *td, struct linux_lchown_args *args)
1522 {
1523 char *path;
1524 int error;
1525
1526 LCONVPATHEXIST(td, args->path, &path);
1527
1528 #ifdef DEBUG
1529 if (ldebug(lchown))
1530 printf(ARGS(lchown, "%s, %d, %d"), path, args->uid, args->gid);
1531 #endif
1532 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid,
1533 args->gid, AT_SYMLINK_NOFOLLOW);
1534 LFREEPATH(path);
1535 return (error);
1536 }
1537
1538 static int
1539 convert_fadvice(int advice)
1540 {
1541 switch (advice) {
1542 case LINUX_POSIX_FADV_NORMAL:
1543 return (POSIX_FADV_NORMAL);
1544 case LINUX_POSIX_FADV_RANDOM:
1545 return (POSIX_FADV_RANDOM);
1546 case LINUX_POSIX_FADV_SEQUENTIAL:
1547 return (POSIX_FADV_SEQUENTIAL);
1548 case LINUX_POSIX_FADV_WILLNEED:
1549 return (POSIX_FADV_WILLNEED);
1550 case LINUX_POSIX_FADV_DONTNEED:
1551 return (POSIX_FADV_DONTNEED);
1552 case LINUX_POSIX_FADV_NOREUSE:
1553 return (POSIX_FADV_NOREUSE);
1554 default:
1555 return (-1);
1556 }
1557 }
1558
1559 int
1560 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args)
1561 {
1562 int advice;
1563
1564 advice = convert_fadvice(args->advice);
1565 if (advice == -1)
1566 return (EINVAL);
1567 return (kern_posix_fadvise(td, args->fd, args->offset, args->len,
1568 advice));
1569 }
1570
1571 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1572 int
1573 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args)
1574 {
1575 int advice;
1576
1577 advice = convert_fadvice(args->advice);
1578 if (advice == -1)
1579 return (EINVAL);
1580 return (kern_posix_fadvise(td, args->fd, args->offset, args->len,
1581 advice));
1582 }
1583 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1584
1585 int
1586 linux_pipe(struct thread *td, struct linux_pipe_args *args)
1587 {
1588 int fildes[2];
1589 int error;
1590
1591 #ifdef DEBUG
1592 if (ldebug(pipe))
1593 printf(ARGS(pipe, "*"));
1594 #endif
1595
1596 error = kern_pipe(td, fildes, 0, NULL, NULL);
1597 if (error != 0)
1598 return (error);
1599
1600 error = copyout(fildes, args->pipefds, sizeof(fildes));
1601 if (error != 0) {
1602 (void)kern_close(td, fildes[0]);
1603 (void)kern_close(td, fildes[1]);
1604 }
1605
1606 return (error);
1607 }
1608
1609 int
1610 linux_pipe2(struct thread *td, struct linux_pipe2_args *args)
1611 {
1612 int fildes[2];
1613 int error, flags;
1614
1615 #ifdef DEBUG
1616 if (ldebug(pipe2))
1617 printf(ARGS(pipe2, "*, %d"), args->flags);
1618 #endif
1619
1620 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0)
1621 return (EINVAL);
1622
1623 flags = 0;
1624 if ((args->flags & LINUX_O_NONBLOCK) != 0)
1625 flags |= O_NONBLOCK;
1626 if ((args->flags & LINUX_O_CLOEXEC) != 0)
1627 flags |= O_CLOEXEC;
1628 error = kern_pipe(td, fildes, flags, NULL, NULL);
1629 if (error != 0)
1630 return (error);
1631
1632 error = copyout(fildes, args->pipefds, sizeof(fildes));
1633 if (error != 0) {
1634 (void)kern_close(td, fildes[0]);
1635 (void)kern_close(td, fildes[1]);
1636 }
1637
1638 return (error);
1639 }
1640
1641 int
1642 linux_dup3(struct thread *td, struct linux_dup3_args *args)
1643 {
1644 int cmd;
1645 intptr_t newfd;
1646
1647 if (args->oldfd == args->newfd)
1648 return (EINVAL);
1649 if ((args->flags & ~LINUX_O_CLOEXEC) != 0)
1650 return (EINVAL);
1651 if (args->flags & LINUX_O_CLOEXEC)
1652 cmd = F_DUP2FD_CLOEXEC;
1653 else
1654 cmd = F_DUP2FD;
1655
1656 newfd = args->newfd;
1657 return (kern_fcntl(td, args->oldfd, cmd, newfd));
1658 }
1659
1660 int
1661 linux_fallocate(struct thread *td, struct linux_fallocate_args *args)
1662 {
1663
1664 /*
1665 * We emulate only posix_fallocate system call for which
1666 * mode should be 0.
1667 */
1668 if (args->mode != 0)
1669 return (ENOSYS);
1670
1671 return (kern_posix_fallocate(td, args->fd, args->offset,
1672 args->len));
1673 }
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