1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1994-1995 Søren Schmidt
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/11.2/sys/compat/linux/linux_file.c 330997 2018-03-15 12:56:22Z emaste $");
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 /*
311 * Linux l_dirent is bigger than FreeBSD dirent, thus the buffer size
312 * passed to kern_getdirentries() must be smaller than the one passed
313 * to linux_getdents() by certain factor.
314 */
315 #define LINUX_RECLEN_RATIO(X) X * offsetof(struct dirent, d_name) / \
316 offsetof(struct l_dirent, d_name);
317 #define LINUX_RECLEN64_RATIO(X) X * offsetof(struct dirent, d_name) / \
318 offsetof(struct l_dirent64, d_name);
319
320 int
321 linux_getdents(struct thread *td, struct linux_getdents_args *args)
322 {
323 struct dirent *bdp;
324 caddr_t inp, buf; /* BSD-format */
325 int len, reclen; /* BSD-format */
326 caddr_t outp; /* Linux-format */
327 int resid, linuxreclen; /* Linux-format */
328 caddr_t lbuf; /* Linux-format */
329 long base;
330 struct l_dirent *linux_dirent;
331 int buflen, error;
332 size_t retval;
333
334 #ifdef DEBUG
335 if (ldebug(getdents))
336 printf(ARGS(getdents, "%d, *, %d"), args->fd, args->count);
337 #endif
338 buflen = LINUX_RECLEN_RATIO(args->count);
339 buflen = min(buflen, MAXBSIZE);
340 buf = malloc(buflen, M_TEMP, M_WAITOK);
341
342 error = kern_getdirentries(td, args->fd, buf, buflen,
343 &base, NULL, UIO_SYSSPACE);
344 if (error != 0) {
345 error = linux_getdents_error(td, args->fd, error);
346 goto out1;
347 }
348
349 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO);
350
351 len = td->td_retval[0];
352 inp = buf;
353 outp = (caddr_t)args->dent;
354 resid = args->count;
355 retval = 0;
356
357 while (len > 0) {
358 bdp = (struct dirent *) inp;
359 reclen = bdp->d_reclen;
360 linuxreclen = LINUX_RECLEN(bdp->d_namlen);
361 /*
362 * No more space in the user supplied dirent buffer.
363 * Return EINVAL.
364 */
365 if (resid < linuxreclen) {
366 error = EINVAL;
367 goto out;
368 }
369
370 linux_dirent = (struct l_dirent*)lbuf;
371 linux_dirent->d_ino = bdp->d_fileno;
372 linux_dirent->d_off = base + reclen;
373 linux_dirent->d_reclen = linuxreclen;
374 /*
375 * Copy d_type to last byte of l_dirent buffer
376 */
377 lbuf[linuxreclen - 1] = bdp->d_type;
378 strlcpy(linux_dirent->d_name, bdp->d_name,
379 linuxreclen - offsetof(struct l_dirent, d_name)-1);
380 error = copyout(linux_dirent, outp, linuxreclen);
381 if (error != 0)
382 goto out;
383
384 inp += reclen;
385 base += reclen;
386 len -= reclen;
387
388 retval += linuxreclen;
389 outp += linuxreclen;
390 resid -= linuxreclen;
391 }
392 td->td_retval[0] = retval;
393
394 out:
395 free(lbuf, M_TEMP);
396 out1:
397 free(buf, M_TEMP);
398 return (error);
399 }
400
401 int
402 linux_getdents64(struct thread *td, struct linux_getdents64_args *args)
403 {
404 struct dirent *bdp;
405 caddr_t inp, buf; /* BSD-format */
406 int len, reclen; /* BSD-format */
407 caddr_t outp; /* Linux-format */
408 int resid, linuxreclen; /* Linux-format */
409 caddr_t lbuf; /* Linux-format */
410 long base;
411 struct l_dirent64 *linux_dirent64;
412 int buflen, error;
413 size_t retval;
414
415 #ifdef DEBUG
416 if (ldebug(getdents64))
417 uprintf(ARGS(getdents64, "%d, *, %d"), args->fd, args->count);
418 #endif
419 buflen = LINUX_RECLEN64_RATIO(args->count);
420 buflen = min(buflen, MAXBSIZE);
421 buf = malloc(buflen, M_TEMP, M_WAITOK);
422
423 error = kern_getdirentries(td, args->fd, buf, buflen,
424 &base, NULL, UIO_SYSSPACE);
425 if (error != 0) {
426 error = linux_getdents_error(td, args->fd, error);
427 goto out1;
428 }
429
430 lbuf = malloc(LINUX_RECLEN64(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO);
431
432 len = td->td_retval[0];
433 inp = buf;
434 outp = (caddr_t)args->dirent;
435 resid = args->count;
436 retval = 0;
437
438 while (len > 0) {
439 bdp = (struct dirent *) inp;
440 reclen = bdp->d_reclen;
441 linuxreclen = LINUX_RECLEN64(bdp->d_namlen);
442 /*
443 * No more space in the user supplied dirent buffer.
444 * Return EINVAL.
445 */
446 if (resid < linuxreclen) {
447 error = EINVAL;
448 goto out;
449 }
450
451 linux_dirent64 = (struct l_dirent64*)lbuf;
452 linux_dirent64->d_ino = bdp->d_fileno;
453 linux_dirent64->d_off = base + reclen;
454 linux_dirent64->d_reclen = linuxreclen;
455 linux_dirent64->d_type = bdp->d_type;
456 strlcpy(linux_dirent64->d_name, bdp->d_name,
457 linuxreclen - offsetof(struct l_dirent64, d_name));
458 error = copyout(linux_dirent64, outp, linuxreclen);
459 if (error != 0)
460 goto out;
461
462 inp += reclen;
463 base += reclen;
464 len -= reclen;
465
466 retval += linuxreclen;
467 outp += linuxreclen;
468 resid -= linuxreclen;
469 }
470 td->td_retval[0] = retval;
471
472 out:
473 free(lbuf, M_TEMP);
474 out1:
475 free(buf, M_TEMP);
476 return (error);
477 }
478
479 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
480 int
481 linux_readdir(struct thread *td, struct linux_readdir_args *args)
482 {
483 struct dirent *bdp;
484 caddr_t buf; /* BSD-format */
485 int linuxreclen; /* Linux-format */
486 caddr_t lbuf; /* Linux-format */
487 long base;
488 struct l_dirent *linux_dirent;
489 int buflen, error;
490
491 #ifdef DEBUG
492 if (ldebug(readdir))
493 printf(ARGS(readdir, "%d, *"), args->fd);
494 #endif
495 buflen = LINUX_RECLEN(LINUX_NAME_MAX);
496 buflen = LINUX_RECLEN_RATIO(buflen);
497 buf = malloc(buflen, M_TEMP, M_WAITOK);
498
499 error = kern_getdirentries(td, args->fd, buf, buflen,
500 &base, NULL, UIO_SYSSPACE);
501 if (error != 0) {
502 error = linux_getdents_error(td, args->fd, error);
503 goto out;
504 }
505 if (td->td_retval[0] == 0)
506 goto out;
507
508 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO);
509
510 bdp = (struct dirent *) buf;
511 linuxreclen = LINUX_RECLEN(bdp->d_namlen);
512
513 linux_dirent = (struct l_dirent*)lbuf;
514 linux_dirent->d_ino = bdp->d_fileno;
515 linux_dirent->d_off = linuxreclen;
516 linux_dirent->d_reclen = bdp->d_namlen;
517 strlcpy(linux_dirent->d_name, bdp->d_name,
518 linuxreclen - offsetof(struct l_dirent, d_name));
519 error = copyout(linux_dirent, args->dent, linuxreclen);
520 if (error == 0)
521 td->td_retval[0] = linuxreclen;
522
523 free(lbuf, M_TEMP);
524 out:
525 free(buf, M_TEMP);
526 return (error);
527 }
528 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
529
530
531 /*
532 * These exist mainly for hooks for doing /compat/linux translation.
533 */
534
535 int
536 linux_access(struct thread *td, struct linux_access_args *args)
537 {
538 char *path;
539 int error;
540
541 /* linux convention */
542 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
543 return (EINVAL);
544
545 LCONVPATHEXIST(td, args->path, &path);
546
547 #ifdef DEBUG
548 if (ldebug(access))
549 printf(ARGS(access, "%s, %d"), path, args->amode);
550 #endif
551 error = kern_accessat(td, AT_FDCWD, path, UIO_SYSSPACE, 0,
552 args->amode);
553 LFREEPATH(path);
554
555 return (error);
556 }
557
558 int
559 linux_faccessat(struct thread *td, struct linux_faccessat_args *args)
560 {
561 char *path;
562 int error, dfd;
563
564 /* linux convention */
565 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
566 return (EINVAL);
567
568 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
569 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
570
571 #ifdef DEBUG
572 if (ldebug(access))
573 printf(ARGS(access, "%s, %d"), path, args->amode);
574 #endif
575
576 error = kern_accessat(td, dfd, path, UIO_SYSSPACE, 0, args->amode);
577 LFREEPATH(path);
578
579 return (error);
580 }
581
582 int
583 linux_unlink(struct thread *td, struct linux_unlink_args *args)
584 {
585 char *path;
586 int error;
587 struct stat st;
588
589 LCONVPATHEXIST(td, args->path, &path);
590
591 #ifdef DEBUG
592 if (ldebug(unlink))
593 printf(ARGS(unlink, "%s"), path);
594 #endif
595
596 error = kern_unlinkat(td, AT_FDCWD, path, UIO_SYSSPACE, 0);
597 if (error == EPERM) {
598 /* Introduce POSIX noncompliant behaviour of Linux */
599 if (kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE, &st,
600 NULL) == 0) {
601 if (S_ISDIR(st.st_mode))
602 error = EISDIR;
603 }
604 }
605 LFREEPATH(path);
606 return (error);
607 }
608
609 int
610 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args)
611 {
612 char *path;
613 int error, dfd;
614 struct stat st;
615
616 if (args->flag & ~LINUX_AT_REMOVEDIR)
617 return (EINVAL);
618
619 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
620 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
621
622 #ifdef DEBUG
623 if (ldebug(unlinkat))
624 printf(ARGS(unlinkat, "%s"), path);
625 #endif
626
627 if (args->flag & LINUX_AT_REMOVEDIR)
628 error = kern_rmdirat(td, dfd, path, UIO_SYSSPACE);
629 else
630 error = kern_unlinkat(td, dfd, path, UIO_SYSSPACE, 0);
631 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) {
632 /* Introduce POSIX noncompliant behaviour of Linux */
633 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path,
634 UIO_SYSSPACE, &st, NULL) == 0 && S_ISDIR(st.st_mode))
635 error = EISDIR;
636 }
637 LFREEPATH(path);
638 return (error);
639 }
640 int
641 linux_chdir(struct thread *td, struct linux_chdir_args *args)
642 {
643 char *path;
644 int error;
645
646 LCONVPATHEXIST(td, args->path, &path);
647
648 #ifdef DEBUG
649 if (ldebug(chdir))
650 printf(ARGS(chdir, "%s"), path);
651 #endif
652 error = kern_chdir(td, path, UIO_SYSSPACE);
653 LFREEPATH(path);
654 return (error);
655 }
656
657 int
658 linux_chmod(struct thread *td, struct linux_chmod_args *args)
659 {
660 char *path;
661 int error;
662
663 LCONVPATHEXIST(td, args->path, &path);
664
665 #ifdef DEBUG
666 if (ldebug(chmod))
667 printf(ARGS(chmod, "%s, %d"), path, args->mode);
668 #endif
669 error = kern_fchmodat(td, AT_FDCWD, path, UIO_SYSSPACE,
670 args->mode, 0);
671 LFREEPATH(path);
672 return (error);
673 }
674
675 int
676 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args)
677 {
678 char *path;
679 int error, dfd;
680
681 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
682 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
683
684 #ifdef DEBUG
685 if (ldebug(fchmodat))
686 printf(ARGS(fchmodat, "%s, %d"), path, args->mode);
687 #endif
688
689 error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0);
690 LFREEPATH(path);
691 return (error);
692 }
693
694 int
695 linux_mkdir(struct thread *td, struct linux_mkdir_args *args)
696 {
697 char *path;
698 int error;
699
700 LCONVPATHCREAT(td, args->path, &path);
701
702 #ifdef DEBUG
703 if (ldebug(mkdir))
704 printf(ARGS(mkdir, "%s, %d"), path, args->mode);
705 #endif
706 error = kern_mkdirat(td, AT_FDCWD, path, UIO_SYSSPACE, args->mode);
707 LFREEPATH(path);
708 return (error);
709 }
710
711 int
712 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args)
713 {
714 char *path;
715 int error, dfd;
716
717 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
718 LCONVPATHCREAT_AT(td, args->pathname, &path, dfd);
719
720 #ifdef DEBUG
721 if (ldebug(mkdirat))
722 printf(ARGS(mkdirat, "%s, %d"), path, args->mode);
723 #endif
724 error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode);
725 LFREEPATH(path);
726 return (error);
727 }
728
729 int
730 linux_rmdir(struct thread *td, struct linux_rmdir_args *args)
731 {
732 char *path;
733 int error;
734
735 LCONVPATHEXIST(td, args->path, &path);
736
737 #ifdef DEBUG
738 if (ldebug(rmdir))
739 printf(ARGS(rmdir, "%s"), path);
740 #endif
741 error = kern_rmdirat(td, AT_FDCWD, path, UIO_SYSSPACE);
742 LFREEPATH(path);
743 return (error);
744 }
745
746 int
747 linux_rename(struct thread *td, struct linux_rename_args *args)
748 {
749 char *from, *to;
750 int error;
751
752 LCONVPATHEXIST(td, args->from, &from);
753 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
754 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
755 if (to == NULL) {
756 LFREEPATH(from);
757 return (error);
758 }
759
760 #ifdef DEBUG
761 if (ldebug(rename))
762 printf(ARGS(rename, "%s, %s"), from, to);
763 #endif
764 error = kern_renameat(td, AT_FDCWD, from, AT_FDCWD, to, UIO_SYSSPACE);
765 LFREEPATH(from);
766 LFREEPATH(to);
767 return (error);
768 }
769
770 int
771 linux_renameat(struct thread *td, struct linux_renameat_args *args)
772 {
773 char *from, *to;
774 int error, olddfd, newdfd;
775
776 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
777 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
778 LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd);
779 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
780 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
781 if (to == NULL) {
782 LFREEPATH(from);
783 return (error);
784 }
785
786 #ifdef DEBUG
787 if (ldebug(renameat))
788 printf(ARGS(renameat, "%s, %s"), from, to);
789 #endif
790 error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE);
791 LFREEPATH(from);
792 LFREEPATH(to);
793 return (error);
794 }
795
796 int
797 linux_symlink(struct thread *td, struct linux_symlink_args *args)
798 {
799 char *path, *to;
800 int error;
801
802 LCONVPATHEXIST(td, args->path, &path);
803 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
804 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
805 if (to == NULL) {
806 LFREEPATH(path);
807 return (error);
808 }
809
810 #ifdef DEBUG
811 if (ldebug(symlink))
812 printf(ARGS(symlink, "%s, %s"), path, to);
813 #endif
814 error = kern_symlinkat(td, path, AT_FDCWD, to, UIO_SYSSPACE);
815 LFREEPATH(path);
816 LFREEPATH(to);
817 return (error);
818 }
819
820 int
821 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args)
822 {
823 char *path, *to;
824 int error, dfd;
825
826 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
827 LCONVPATHEXIST(td, args->oldname, &path);
828 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
829 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd);
830 if (to == NULL) {
831 LFREEPATH(path);
832 return (error);
833 }
834
835 #ifdef DEBUG
836 if (ldebug(symlinkat))
837 printf(ARGS(symlinkat, "%s, %s"), path, to);
838 #endif
839
840 error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE);
841 LFREEPATH(path);
842 LFREEPATH(to);
843 return (error);
844 }
845
846 int
847 linux_readlink(struct thread *td, struct linux_readlink_args *args)
848 {
849 char *name;
850 int error;
851
852 LCONVPATHEXIST(td, args->name, &name);
853
854 #ifdef DEBUG
855 if (ldebug(readlink))
856 printf(ARGS(readlink, "%s, %p, %d"), name, (void *)args->buf,
857 args->count);
858 #endif
859 error = kern_readlinkat(td, AT_FDCWD, name, UIO_SYSSPACE,
860 args->buf, UIO_USERSPACE, args->count);
861 LFREEPATH(name);
862 return (error);
863 }
864
865 int
866 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args)
867 {
868 char *name;
869 int error, dfd;
870
871 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
872 LCONVPATHEXIST_AT(td, args->path, &name, dfd);
873
874 #ifdef DEBUG
875 if (ldebug(readlinkat))
876 printf(ARGS(readlinkat, "%s, %p, %d"), name, (void *)args->buf,
877 args->bufsiz);
878 #endif
879
880 error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf,
881 UIO_USERSPACE, args->bufsiz);
882 LFREEPATH(name);
883 return (error);
884 }
885
886 int
887 linux_truncate(struct thread *td, struct linux_truncate_args *args)
888 {
889 char *path;
890 int error;
891
892 LCONVPATHEXIST(td, args->path, &path);
893
894 #ifdef DEBUG
895 if (ldebug(truncate))
896 printf(ARGS(truncate, "%s, %ld"), path, (long)args->length);
897 #endif
898
899 error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
900 LFREEPATH(path);
901 return (error);
902 }
903
904 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
905 int
906 linux_truncate64(struct thread *td, struct linux_truncate64_args *args)
907 {
908 char *path;
909 int error;
910
911 LCONVPATHEXIST(td, args->path, &path);
912
913 #ifdef DEBUG
914 if (ldebug(truncate64))
915 printf(ARGS(truncate64, "%s, %jd"), path, args->length);
916 #endif
917
918 error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
919 LFREEPATH(path);
920 return (error);
921 }
922 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
923
924 int
925 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args)
926 {
927
928 return (kern_ftruncate(td, args->fd, args->length));
929 }
930
931 int
932 linux_link(struct thread *td, struct linux_link_args *args)
933 {
934 char *path, *to;
935 int error;
936
937 LCONVPATHEXIST(td, args->path, &path);
938 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
939 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
940 if (to == NULL) {
941 LFREEPATH(path);
942 return (error);
943 }
944
945 #ifdef DEBUG
946 if (ldebug(link))
947 printf(ARGS(link, "%s, %s"), path, to);
948 #endif
949 error = kern_linkat(td, AT_FDCWD, AT_FDCWD, path, to, UIO_SYSSPACE,
950 FOLLOW);
951 LFREEPATH(path);
952 LFREEPATH(to);
953 return (error);
954 }
955
956 int
957 linux_linkat(struct thread *td, struct linux_linkat_args *args)
958 {
959 char *path, *to;
960 int error, olddfd, newdfd, follow;
961
962 if (args->flag & ~LINUX_AT_SYMLINK_FOLLOW)
963 return (EINVAL);
964
965 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
966 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
967 LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd);
968 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
969 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
970 if (to == NULL) {
971 LFREEPATH(path);
972 return (error);
973 }
974
975 #ifdef DEBUG
976 if (ldebug(linkat))
977 printf(ARGS(linkat, "%i, %s, %i, %s, %i"), args->olddfd, path,
978 args->newdfd, to, args->flag);
979 #endif
980
981 follow = (args->flag & LINUX_AT_SYMLINK_FOLLOW) == 0 ? NOFOLLOW :
982 FOLLOW;
983 error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, follow);
984 LFREEPATH(path);
985 LFREEPATH(to);
986 return (error);
987 }
988
989 int
990 linux_fdatasync(td, uap)
991 struct thread *td;
992 struct linux_fdatasync_args *uap;
993 {
994
995 return (kern_fsync(td, uap->fd, false));
996 }
997
998 int
999 linux_pread(struct thread *td, struct linux_pread_args *uap)
1000 {
1001 cap_rights_t rights;
1002 struct vnode *vp;
1003 int error;
1004
1005 error = kern_pread(td, uap->fd, uap->buf, uap->nbyte, uap->offset);
1006 if (error == 0) {
1007 /* This seems to violate POSIX but linux does it */
1008 error = fgetvp(td, uap->fd,
1009 cap_rights_init(&rights, CAP_PREAD), &vp);
1010 if (error != 0)
1011 return (error);
1012 if (vp->v_type == VDIR) {
1013 vrele(vp);
1014 return (EISDIR);
1015 }
1016 vrele(vp);
1017 }
1018 return (error);
1019 }
1020
1021 int
1022 linux_pwrite(struct thread *td, struct linux_pwrite_args *uap)
1023 {
1024
1025 return (kern_pwrite(td, uap->fd, uap->buf, uap->nbyte, uap->offset));
1026 }
1027
1028 int
1029 linux_preadv(struct thread *td, struct linux_preadv_args *uap)
1030 {
1031 struct uio *auio;
1032 int error;
1033 off_t offset;
1034
1035 /*
1036 * According http://man7.org/linux/man-pages/man2/preadv.2.html#NOTES
1037 * pos_l and pos_h, respectively, contain the
1038 * low order and high order 32 bits of offset.
1039 */
1040 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) <<
1041 (sizeof(offset) * 4)) | uap->pos_l;
1042 if (offset < 0)
1043 return (EINVAL);
1044 #ifdef COMPAT_LINUX32
1045 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio);
1046 #else
1047 error = copyinuio(uap->vec, uap->vlen, &auio);
1048 #endif
1049 if (error != 0)
1050 return (error);
1051 error = kern_preadv(td, uap->fd, auio, offset);
1052 free(auio, M_IOV);
1053 return (error);
1054 }
1055
1056 int
1057 linux_pwritev(struct thread *td, struct linux_pwritev_args *uap)
1058 {
1059 struct uio *auio;
1060 int error;
1061 off_t offset;
1062
1063 /*
1064 * According http://man7.org/linux/man-pages/man2/pwritev.2.html#NOTES
1065 * pos_l and pos_h, respectively, contain the
1066 * low order and high order 32 bits of offset.
1067 */
1068 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) <<
1069 (sizeof(offset) * 4)) | uap->pos_l;
1070 if (offset < 0)
1071 return (EINVAL);
1072 #ifdef COMPAT_LINUX32
1073 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio);
1074 #else
1075 error = copyinuio(uap->vec, uap->vlen, &auio);
1076 #endif
1077 if (error != 0)
1078 return (error);
1079 error = kern_pwritev(td, uap->fd, auio, offset);
1080 free(auio, M_IOV);
1081 return (error);
1082 }
1083
1084 int
1085 linux_mount(struct thread *td, struct linux_mount_args *args)
1086 {
1087 char fstypename[MFSNAMELEN];
1088 char mntonname[MNAMELEN], mntfromname[MNAMELEN];
1089 int error;
1090 int fsflags;
1091
1092 error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1,
1093 NULL);
1094 if (error)
1095 return (error);
1096 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL);
1097 if (error)
1098 return (error);
1099 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL);
1100 if (error)
1101 return (error);
1102
1103 #ifdef DEBUG
1104 if (ldebug(mount))
1105 printf(ARGS(mount, "%s, %s, %s"),
1106 fstypename, mntfromname, mntonname);
1107 #endif
1108
1109 if (strcmp(fstypename, "ext2") == 0) {
1110 strcpy(fstypename, "ext2fs");
1111 } else if (strcmp(fstypename, "proc") == 0) {
1112 strcpy(fstypename, "linprocfs");
1113 } else if (strcmp(fstypename, "vfat") == 0) {
1114 strcpy(fstypename, "msdosfs");
1115 }
1116
1117 fsflags = 0;
1118
1119 if ((args->rwflag & 0xffff0000) == 0xc0ed0000) {
1120 /*
1121 * Linux SYNC flag is not included; the closest equivalent
1122 * FreeBSD has is !ASYNC, which is our default.
1123 */
1124 if (args->rwflag & LINUX_MS_RDONLY)
1125 fsflags |= MNT_RDONLY;
1126 if (args->rwflag & LINUX_MS_NOSUID)
1127 fsflags |= MNT_NOSUID;
1128 if (args->rwflag & LINUX_MS_NOEXEC)
1129 fsflags |= MNT_NOEXEC;
1130 if (args->rwflag & LINUX_MS_REMOUNT)
1131 fsflags |= MNT_UPDATE;
1132 }
1133
1134 error = kernel_vmount(fsflags,
1135 "fstype", fstypename,
1136 "fspath", mntonname,
1137 "from", mntfromname,
1138 NULL);
1139 return (error);
1140 }
1141
1142 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1143 int
1144 linux_oldumount(struct thread *td, struct linux_oldumount_args *args)
1145 {
1146 struct linux_umount_args args2;
1147
1148 args2.path = args->path;
1149 args2.flags = 0;
1150 return (linux_umount(td, &args2));
1151 }
1152 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1153
1154 int
1155 linux_umount(struct thread *td, struct linux_umount_args *args)
1156 {
1157 struct unmount_args bsd;
1158
1159 bsd.path = args->path;
1160 bsd.flags = args->flags; /* XXX correct? */
1161 return (sys_unmount(td, &bsd));
1162 }
1163
1164 /*
1165 * fcntl family of syscalls
1166 */
1167
1168 struct l_flock {
1169 l_short l_type;
1170 l_short l_whence;
1171 l_off_t l_start;
1172 l_off_t l_len;
1173 l_pid_t l_pid;
1174 }
1175 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1176 __packed
1177 #endif
1178 ;
1179
1180 static void
1181 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock)
1182 {
1183 switch (linux_flock->l_type) {
1184 case LINUX_F_RDLCK:
1185 bsd_flock->l_type = F_RDLCK;
1186 break;
1187 case LINUX_F_WRLCK:
1188 bsd_flock->l_type = F_WRLCK;
1189 break;
1190 case LINUX_F_UNLCK:
1191 bsd_flock->l_type = F_UNLCK;
1192 break;
1193 default:
1194 bsd_flock->l_type = -1;
1195 break;
1196 }
1197 bsd_flock->l_whence = linux_flock->l_whence;
1198 bsd_flock->l_start = (off_t)linux_flock->l_start;
1199 bsd_flock->l_len = (off_t)linux_flock->l_len;
1200 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1201 bsd_flock->l_sysid = 0;
1202 }
1203
1204 static void
1205 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock)
1206 {
1207 switch (bsd_flock->l_type) {
1208 case F_RDLCK:
1209 linux_flock->l_type = LINUX_F_RDLCK;
1210 break;
1211 case F_WRLCK:
1212 linux_flock->l_type = LINUX_F_WRLCK;
1213 break;
1214 case F_UNLCK:
1215 linux_flock->l_type = LINUX_F_UNLCK;
1216 break;
1217 }
1218 linux_flock->l_whence = bsd_flock->l_whence;
1219 linux_flock->l_start = (l_off_t)bsd_flock->l_start;
1220 linux_flock->l_len = (l_off_t)bsd_flock->l_len;
1221 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1222 }
1223
1224 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1225 struct l_flock64 {
1226 l_short l_type;
1227 l_short l_whence;
1228 l_loff_t l_start;
1229 l_loff_t l_len;
1230 l_pid_t l_pid;
1231 }
1232 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1233 __packed
1234 #endif
1235 ;
1236
1237 static void
1238 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock)
1239 {
1240 switch (linux_flock->l_type) {
1241 case LINUX_F_RDLCK:
1242 bsd_flock->l_type = F_RDLCK;
1243 break;
1244 case LINUX_F_WRLCK:
1245 bsd_flock->l_type = F_WRLCK;
1246 break;
1247 case LINUX_F_UNLCK:
1248 bsd_flock->l_type = F_UNLCK;
1249 break;
1250 default:
1251 bsd_flock->l_type = -1;
1252 break;
1253 }
1254 bsd_flock->l_whence = linux_flock->l_whence;
1255 bsd_flock->l_start = (off_t)linux_flock->l_start;
1256 bsd_flock->l_len = (off_t)linux_flock->l_len;
1257 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1258 bsd_flock->l_sysid = 0;
1259 }
1260
1261 static void
1262 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock)
1263 {
1264 switch (bsd_flock->l_type) {
1265 case F_RDLCK:
1266 linux_flock->l_type = LINUX_F_RDLCK;
1267 break;
1268 case F_WRLCK:
1269 linux_flock->l_type = LINUX_F_WRLCK;
1270 break;
1271 case F_UNLCK:
1272 linux_flock->l_type = LINUX_F_UNLCK;
1273 break;
1274 }
1275 linux_flock->l_whence = bsd_flock->l_whence;
1276 linux_flock->l_start = (l_loff_t)bsd_flock->l_start;
1277 linux_flock->l_len = (l_loff_t)bsd_flock->l_len;
1278 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1279 }
1280 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1281
1282 static int
1283 fcntl_common(struct thread *td, struct linux_fcntl_args *args)
1284 {
1285 struct l_flock linux_flock;
1286 struct flock bsd_flock;
1287 cap_rights_t rights;
1288 struct file *fp;
1289 long arg;
1290 int error, result;
1291
1292 switch (args->cmd) {
1293 case LINUX_F_DUPFD:
1294 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg));
1295
1296 case LINUX_F_GETFD:
1297 return (kern_fcntl(td, args->fd, F_GETFD, 0));
1298
1299 case LINUX_F_SETFD:
1300 return (kern_fcntl(td, args->fd, F_SETFD, args->arg));
1301
1302 case LINUX_F_GETFL:
1303 error = kern_fcntl(td, args->fd, F_GETFL, 0);
1304 result = td->td_retval[0];
1305 td->td_retval[0] = 0;
1306 if (result & O_RDONLY)
1307 td->td_retval[0] |= LINUX_O_RDONLY;
1308 if (result & O_WRONLY)
1309 td->td_retval[0] |= LINUX_O_WRONLY;
1310 if (result & O_RDWR)
1311 td->td_retval[0] |= LINUX_O_RDWR;
1312 if (result & O_NDELAY)
1313 td->td_retval[0] |= LINUX_O_NONBLOCK;
1314 if (result & O_APPEND)
1315 td->td_retval[0] |= LINUX_O_APPEND;
1316 if (result & O_FSYNC)
1317 td->td_retval[0] |= LINUX_O_SYNC;
1318 if (result & O_ASYNC)
1319 td->td_retval[0] |= LINUX_FASYNC;
1320 #ifdef LINUX_O_NOFOLLOW
1321 if (result & O_NOFOLLOW)
1322 td->td_retval[0] |= LINUX_O_NOFOLLOW;
1323 #endif
1324 #ifdef LINUX_O_DIRECT
1325 if (result & O_DIRECT)
1326 td->td_retval[0] |= LINUX_O_DIRECT;
1327 #endif
1328 return (error);
1329
1330 case LINUX_F_SETFL:
1331 arg = 0;
1332 if (args->arg & LINUX_O_NDELAY)
1333 arg |= O_NONBLOCK;
1334 if (args->arg & LINUX_O_APPEND)
1335 arg |= O_APPEND;
1336 if (args->arg & LINUX_O_SYNC)
1337 arg |= O_FSYNC;
1338 if (args->arg & LINUX_FASYNC)
1339 arg |= O_ASYNC;
1340 #ifdef LINUX_O_NOFOLLOW
1341 if (args->arg & LINUX_O_NOFOLLOW)
1342 arg |= O_NOFOLLOW;
1343 #endif
1344 #ifdef LINUX_O_DIRECT
1345 if (args->arg & LINUX_O_DIRECT)
1346 arg |= O_DIRECT;
1347 #endif
1348 return (kern_fcntl(td, args->fd, F_SETFL, arg));
1349
1350 case LINUX_F_GETLK:
1351 error = copyin((void *)args->arg, &linux_flock,
1352 sizeof(linux_flock));
1353 if (error)
1354 return (error);
1355 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1356 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1357 if (error)
1358 return (error);
1359 bsd_to_linux_flock(&bsd_flock, &linux_flock);
1360 return (copyout(&linux_flock, (void *)args->arg,
1361 sizeof(linux_flock)));
1362
1363 case LINUX_F_SETLK:
1364 error = copyin((void *)args->arg, &linux_flock,
1365 sizeof(linux_flock));
1366 if (error)
1367 return (error);
1368 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1369 return (kern_fcntl(td, args->fd, F_SETLK,
1370 (intptr_t)&bsd_flock));
1371
1372 case LINUX_F_SETLKW:
1373 error = copyin((void *)args->arg, &linux_flock,
1374 sizeof(linux_flock));
1375 if (error)
1376 return (error);
1377 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1378 return (kern_fcntl(td, args->fd, F_SETLKW,
1379 (intptr_t)&bsd_flock));
1380
1381 case LINUX_F_GETOWN:
1382 return (kern_fcntl(td, args->fd, F_GETOWN, 0));
1383
1384 case LINUX_F_SETOWN:
1385 /*
1386 * XXX some Linux applications depend on F_SETOWN having no
1387 * significant effect for pipes (SIGIO is not delivered for
1388 * pipes under Linux-2.2.35 at least).
1389 */
1390 error = fget(td, args->fd,
1391 cap_rights_init(&rights, CAP_FCNTL), &fp);
1392 if (error)
1393 return (error);
1394 if (fp->f_type == DTYPE_PIPE) {
1395 fdrop(fp, td);
1396 return (EINVAL);
1397 }
1398 fdrop(fp, td);
1399
1400 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg));
1401
1402 case LINUX_F_DUPFD_CLOEXEC:
1403 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg));
1404 }
1405
1406 return (EINVAL);
1407 }
1408
1409 int
1410 linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
1411 {
1412
1413 #ifdef DEBUG
1414 if (ldebug(fcntl))
1415 printf(ARGS(fcntl, "%d, %08x, *"), args->fd, args->cmd);
1416 #endif
1417
1418 return (fcntl_common(td, args));
1419 }
1420
1421 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1422 int
1423 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args)
1424 {
1425 struct l_flock64 linux_flock;
1426 struct flock bsd_flock;
1427 struct linux_fcntl_args fcntl_args;
1428 int error;
1429
1430 #ifdef DEBUG
1431 if (ldebug(fcntl64))
1432 printf(ARGS(fcntl64, "%d, %08x, *"), args->fd, args->cmd);
1433 #endif
1434
1435 switch (args->cmd) {
1436 case LINUX_F_GETLK64:
1437 error = copyin((void *)args->arg, &linux_flock,
1438 sizeof(linux_flock));
1439 if (error)
1440 return (error);
1441 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1442 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1443 if (error)
1444 return (error);
1445 bsd_to_linux_flock64(&bsd_flock, &linux_flock);
1446 return (copyout(&linux_flock, (void *)args->arg,
1447 sizeof(linux_flock)));
1448
1449 case LINUX_F_SETLK64:
1450 error = copyin((void *)args->arg, &linux_flock,
1451 sizeof(linux_flock));
1452 if (error)
1453 return (error);
1454 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1455 return (kern_fcntl(td, args->fd, F_SETLK,
1456 (intptr_t)&bsd_flock));
1457
1458 case LINUX_F_SETLKW64:
1459 error = copyin((void *)args->arg, &linux_flock,
1460 sizeof(linux_flock));
1461 if (error)
1462 return (error);
1463 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1464 return (kern_fcntl(td, args->fd, F_SETLKW,
1465 (intptr_t)&bsd_flock));
1466 }
1467
1468 fcntl_args.fd = args->fd;
1469 fcntl_args.cmd = args->cmd;
1470 fcntl_args.arg = args->arg;
1471 return (fcntl_common(td, &fcntl_args));
1472 }
1473 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1474
1475 int
1476 linux_chown(struct thread *td, struct linux_chown_args *args)
1477 {
1478 char *path;
1479 int error;
1480
1481 LCONVPATHEXIST(td, args->path, &path);
1482
1483 #ifdef DEBUG
1484 if (ldebug(chown))
1485 printf(ARGS(chown, "%s, %d, %d"), path, args->uid, args->gid);
1486 #endif
1487 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid,
1488 args->gid, 0);
1489 LFREEPATH(path);
1490 return (error);
1491 }
1492
1493 int
1494 linux_fchownat(struct thread *td, struct linux_fchownat_args *args)
1495 {
1496 char *path;
1497 int error, dfd, flag;
1498
1499 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
1500 return (EINVAL);
1501
1502 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
1503 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
1504
1505 #ifdef DEBUG
1506 if (ldebug(fchownat))
1507 printf(ARGS(fchownat, "%s, %d, %d"), path, args->uid, args->gid);
1508 #endif
1509
1510 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 :
1511 AT_SYMLINK_NOFOLLOW;
1512 error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid,
1513 flag);
1514 LFREEPATH(path);
1515 return (error);
1516 }
1517
1518 int
1519 linux_lchown(struct thread *td, struct linux_lchown_args *args)
1520 {
1521 char *path;
1522 int error;
1523
1524 LCONVPATHEXIST(td, args->path, &path);
1525
1526 #ifdef DEBUG
1527 if (ldebug(lchown))
1528 printf(ARGS(lchown, "%s, %d, %d"), path, args->uid, args->gid);
1529 #endif
1530 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid,
1531 args->gid, AT_SYMLINK_NOFOLLOW);
1532 LFREEPATH(path);
1533 return (error);
1534 }
1535
1536 static int
1537 convert_fadvice(int advice)
1538 {
1539 switch (advice) {
1540 case LINUX_POSIX_FADV_NORMAL:
1541 return (POSIX_FADV_NORMAL);
1542 case LINUX_POSIX_FADV_RANDOM:
1543 return (POSIX_FADV_RANDOM);
1544 case LINUX_POSIX_FADV_SEQUENTIAL:
1545 return (POSIX_FADV_SEQUENTIAL);
1546 case LINUX_POSIX_FADV_WILLNEED:
1547 return (POSIX_FADV_WILLNEED);
1548 case LINUX_POSIX_FADV_DONTNEED:
1549 return (POSIX_FADV_DONTNEED);
1550 case LINUX_POSIX_FADV_NOREUSE:
1551 return (POSIX_FADV_NOREUSE);
1552 default:
1553 return (-1);
1554 }
1555 }
1556
1557 int
1558 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args)
1559 {
1560 int advice;
1561
1562 advice = convert_fadvice(args->advice);
1563 if (advice == -1)
1564 return (EINVAL);
1565 return (kern_posix_fadvise(td, args->fd, args->offset, args->len,
1566 advice));
1567 }
1568
1569 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1570 int
1571 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args)
1572 {
1573 int advice;
1574
1575 advice = convert_fadvice(args->advice);
1576 if (advice == -1)
1577 return (EINVAL);
1578 return (kern_posix_fadvise(td, args->fd, args->offset, args->len,
1579 advice));
1580 }
1581 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1582
1583 int
1584 linux_pipe(struct thread *td, struct linux_pipe_args *args)
1585 {
1586 int fildes[2];
1587 int error;
1588
1589 #ifdef DEBUG
1590 if (ldebug(pipe))
1591 printf(ARGS(pipe, "*"));
1592 #endif
1593
1594 error = kern_pipe(td, fildes, 0, NULL, NULL);
1595 if (error != 0)
1596 return (error);
1597
1598 error = copyout(fildes, args->pipefds, sizeof(fildes));
1599 if (error != 0) {
1600 (void)kern_close(td, fildes[0]);
1601 (void)kern_close(td, fildes[1]);
1602 }
1603
1604 return (error);
1605 }
1606
1607 int
1608 linux_pipe2(struct thread *td, struct linux_pipe2_args *args)
1609 {
1610 int fildes[2];
1611 int error, flags;
1612
1613 #ifdef DEBUG
1614 if (ldebug(pipe2))
1615 printf(ARGS(pipe2, "*, %d"), args->flags);
1616 #endif
1617
1618 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0)
1619 return (EINVAL);
1620
1621 flags = 0;
1622 if ((args->flags & LINUX_O_NONBLOCK) != 0)
1623 flags |= O_NONBLOCK;
1624 if ((args->flags & LINUX_O_CLOEXEC) != 0)
1625 flags |= O_CLOEXEC;
1626 error = kern_pipe(td, fildes, flags, NULL, NULL);
1627 if (error != 0)
1628 return (error);
1629
1630 error = copyout(fildes, args->pipefds, sizeof(fildes));
1631 if (error != 0) {
1632 (void)kern_close(td, fildes[0]);
1633 (void)kern_close(td, fildes[1]);
1634 }
1635
1636 return (error);
1637 }
1638
1639 int
1640 linux_dup3(struct thread *td, struct linux_dup3_args *args)
1641 {
1642 int cmd;
1643 intptr_t newfd;
1644
1645 if (args->oldfd == args->newfd)
1646 return (EINVAL);
1647 if ((args->flags & ~LINUX_O_CLOEXEC) != 0)
1648 return (EINVAL);
1649 if (args->flags & LINUX_O_CLOEXEC)
1650 cmd = F_DUP2FD_CLOEXEC;
1651 else
1652 cmd = F_DUP2FD;
1653
1654 newfd = args->newfd;
1655 return (kern_fcntl(td, args->oldfd, cmd, newfd));
1656 }
1657
1658 int
1659 linux_fallocate(struct thread *td, struct linux_fallocate_args *args)
1660 {
1661
1662 /*
1663 * We emulate only posix_fallocate system call for which
1664 * mode should be 0.
1665 */
1666 if (args->mode != 0)
1667 return (ENOSYS);
1668
1669 return (kern_posix_fallocate(td, args->fd, args->offset,
1670 args->len));
1671 }
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