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/10.3/sys/compat/linux/linux_file.c 293567 2016-01-09 17:13:43Z dchagin $");
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 #include <security/mac/mac_framework.h>
57
58 #ifdef COMPAT_LINUX32
59 #include <machine/../linux32/linux.h>
60 #include <machine/../linux32/linux32_proto.h>
61 #else
62 #include <machine/../linux/linux.h>
63 #include <machine/../linux/linux_proto.h>
64 #endif
65 #include <compat/linux/linux_misc.h>
66 #include <compat/linux/linux_util.h>
67 #include <compat/linux/linux_file.h>
68
69 int
70 linux_creat(struct thread *td, struct linux_creat_args *args)
71 {
72 char *path;
73 int error;
74
75 LCONVPATHEXIST(td, args->path, &path);
76
77 #ifdef DEBUG
78 if (ldebug(creat))
79 printf(ARGS(creat, "%s, %d"), path, args->mode);
80 #endif
81 error = kern_open(td, path, UIO_SYSSPACE, O_WRONLY | O_CREAT | O_TRUNC,
82 args->mode);
83 LFREEPATH(path);
84 return (error);
85 }
86
87
88 static int
89 linux_common_open(struct thread *td, int dirfd, char *path, int l_flags, int mode)
90 {
91 cap_rights_t rights;
92 struct proc *p = td->td_proc;
93 struct file *fp;
94 int fd;
95 int bsd_flags, error;
96
97 bsd_flags = 0;
98 switch (l_flags & LINUX_O_ACCMODE) {
99 case LINUX_O_WRONLY:
100 bsd_flags |= O_WRONLY;
101 break;
102 case LINUX_O_RDWR:
103 bsd_flags |= O_RDWR;
104 break;
105 default:
106 bsd_flags |= O_RDONLY;
107 }
108 if (l_flags & LINUX_O_NDELAY)
109 bsd_flags |= O_NONBLOCK;
110 if (l_flags & LINUX_O_APPEND)
111 bsd_flags |= O_APPEND;
112 if (l_flags & LINUX_O_SYNC)
113 bsd_flags |= O_FSYNC;
114 if (l_flags & LINUX_O_NONBLOCK)
115 bsd_flags |= O_NONBLOCK;
116 if (l_flags & LINUX_FASYNC)
117 bsd_flags |= O_ASYNC;
118 if (l_flags & LINUX_O_CREAT)
119 bsd_flags |= O_CREAT;
120 if (l_flags & LINUX_O_TRUNC)
121 bsd_flags |= O_TRUNC;
122 if (l_flags & LINUX_O_EXCL)
123 bsd_flags |= O_EXCL;
124 if (l_flags & LINUX_O_NOCTTY)
125 bsd_flags |= O_NOCTTY;
126 if (l_flags & LINUX_O_DIRECT)
127 bsd_flags |= O_DIRECT;
128 if (l_flags & LINUX_O_NOFOLLOW)
129 bsd_flags |= O_NOFOLLOW;
130 if (l_flags & LINUX_O_DIRECTORY)
131 bsd_flags |= O_DIRECTORY;
132 /* XXX LINUX_O_NOATIME: unable to be easily implemented. */
133
134 error = kern_openat(td, dirfd, path, UIO_SYSSPACE, bsd_flags, mode);
135 if (error != 0)
136 goto done;
137
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
205 #ifdef DEBUG
206 if (ldebug(open))
207 printf(ARGS(open, "%s, 0x%x, 0x%x"),
208 path, args->flags, args->mode);
209 #endif
210
211 return (linux_common_open(td, AT_FDCWD, path, args->flags, args->mode));
212 }
213
214 int
215 linux_lseek(struct thread *td, struct linux_lseek_args *args)
216 {
217
218 struct lseek_args /* {
219 int fd;
220 int pad;
221 off_t offset;
222 int whence;
223 } */ tmp_args;
224 int error;
225
226 #ifdef DEBUG
227 if (ldebug(lseek))
228 printf(ARGS(lseek, "%d, %ld, %d"),
229 args->fdes, (long)args->off, args->whence);
230 #endif
231 tmp_args.fd = args->fdes;
232 tmp_args.offset = (off_t)args->off;
233 tmp_args.whence = args->whence;
234 error = sys_lseek(td, &tmp_args);
235 return error;
236 }
237
238 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
239 int
240 linux_llseek(struct thread *td, struct linux_llseek_args *args)
241 {
242 struct lseek_args bsd_args;
243 int error;
244 off_t off;
245
246 #ifdef DEBUG
247 if (ldebug(llseek))
248 printf(ARGS(llseek, "%d, %d:%d, %d"),
249 args->fd, args->ohigh, args->olow, args->whence);
250 #endif
251 off = (args->olow) | (((off_t) args->ohigh) << 32);
252
253 bsd_args.fd = args->fd;
254 bsd_args.offset = off;
255 bsd_args.whence = args->whence;
256
257 if ((error = sys_lseek(td, &bsd_args)))
258 return error;
259
260 if ((error = copyout(td->td_retval, args->res, sizeof (off_t))))
261 return error;
262
263 td->td_retval[0] = 0;
264 return 0;
265 }
266
267 int
268 linux_readdir(struct thread *td, struct linux_readdir_args *args)
269 {
270 struct linux_getdents_args lda;
271
272 lda.fd = args->fd;
273 lda.dent = args->dent;
274 lda.count = 1;
275 return linux_getdents(td, &lda);
276 }
277 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
278
279 /*
280 * Note that linux_getdents(2) and linux_getdents64(2) have the same
281 * arguments. They only differ in the definition of struct dirent they
282 * operate on. We use this to common the code, with the exception of
283 * accessing struct dirent. Note that linux_readdir(2) is implemented
284 * by means of linux_getdents(2). In this case we never operate on
285 * struct dirent64 and thus don't need to handle it...
286 */
287
288 struct l_dirent {
289 l_ulong d_ino;
290 l_off_t d_off;
291 l_ushort d_reclen;
292 char d_name[LINUX_NAME_MAX + 1];
293 };
294
295 struct l_dirent64 {
296 uint64_t d_ino;
297 int64_t d_off;
298 l_ushort d_reclen;
299 u_char d_type;
300 char d_name[LINUX_NAME_MAX + 1];
301 };
302
303 /*
304 * Linux uses the last byte in the dirent buffer to store d_type,
305 * at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes.
306 */
307 #define LINUX_RECLEN(namlen) \
308 roundup((offsetof(struct l_dirent, d_name) + (namlen) + 2), \
309 sizeof(l_ulong))
310
311 #define LINUX_RECLEN64(namlen) \
312 roundup((offsetof(struct l_dirent64, d_name) + (namlen) + 1), \
313 sizeof(uint64_t))
314
315 #define LINUX_MAXRECLEN max(LINUX_RECLEN(LINUX_NAME_MAX), \
316 LINUX_RECLEN64(LINUX_NAME_MAX))
317 #define LINUX_DIRBLKSIZ 512
318
319 static int
320 getdents_common(struct thread *td, struct linux_getdents64_args *args,
321 int is64bit)
322 {
323 struct dirent *bdp;
324 struct vnode *vp;
325 caddr_t inp, buf; /* BSD-format */
326 int len, reclen; /* BSD-format */
327 caddr_t outp; /* Linux-format */
328 int resid, linuxreclen=0; /* Linux-format */
329 caddr_t lbuf; /* Linux-format */
330 cap_rights_t rights;
331 struct file *fp;
332 struct uio auio;
333 struct iovec aiov;
334 off_t off;
335 struct l_dirent *linux_dirent;
336 struct l_dirent64 *linux_dirent64;
337 int buflen, error, eofflag, nbytes, justone;
338 u_long *cookies = NULL, *cookiep;
339 int ncookies;
340
341 nbytes = args->count;
342 if (nbytes == 1) {
343 /* readdir(2) case. Always struct dirent. */
344 if (is64bit)
345 return (EINVAL);
346 nbytes = sizeof(*linux_dirent);
347 justone = 1;
348 } else
349 justone = 0;
350
351 error = getvnode(td->td_proc->p_fd, args->fd,
352 cap_rights_init(&rights, CAP_READ), &fp);
353 if (error != 0)
354 return (error);
355
356 if ((fp->f_flag & FREAD) == 0) {
357 fdrop(fp, td);
358 return (EBADF);
359 }
360
361 off = foffset_lock(fp, 0);
362 vp = fp->f_vnode;
363 if (vp->v_type != VDIR) {
364 foffset_unlock(fp, off, 0);
365 fdrop(fp, td);
366 return (EINVAL);
367 }
368
369
370 buflen = max(LINUX_DIRBLKSIZ, nbytes);
371 buflen = min(buflen, MAXBSIZE);
372 buf = malloc(buflen, M_LINUX, M_WAITOK);
373 lbuf = malloc(LINUX_MAXRECLEN, M_LINUX, M_WAITOK | M_ZERO);
374 vn_lock(vp, LK_SHARED | LK_RETRY);
375
376 aiov.iov_base = buf;
377 aiov.iov_len = buflen;
378 auio.uio_iov = &aiov;
379 auio.uio_iovcnt = 1;
380 auio.uio_rw = UIO_READ;
381 auio.uio_segflg = UIO_SYSSPACE;
382 auio.uio_td = td;
383 auio.uio_resid = buflen;
384 auio.uio_offset = off;
385
386 #ifdef MAC
387 /*
388 * Do directory search MAC check using non-cached credentials.
389 */
390 if ((error = mac_vnode_check_readdir(td->td_ucred, vp)))
391 goto out;
392 #endif /* MAC */
393 if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies,
394 &cookies)))
395 goto out;
396
397 inp = buf;
398 outp = (caddr_t)args->dirent;
399 resid = nbytes;
400 if ((len = buflen - auio.uio_resid) <= 0)
401 goto eof;
402
403 cookiep = cookies;
404
405 if (cookies) {
406 /*
407 * When using cookies, the vfs has the option of reading from
408 * a different offset than that supplied (UFS truncates the
409 * offset to a block boundary to make sure that it never reads
410 * partway through a directory entry, even if the directory
411 * has been compacted).
412 */
413 while (len > 0 && ncookies > 0 && *cookiep <= off) {
414 bdp = (struct dirent *) inp;
415 len -= bdp->d_reclen;
416 inp += bdp->d_reclen;
417 cookiep++;
418 ncookies--;
419 }
420 }
421
422 while (len > 0) {
423 if (cookiep && ncookies == 0)
424 break;
425 bdp = (struct dirent *) inp;
426 reclen = bdp->d_reclen;
427 if (reclen & 3) {
428 error = EFAULT;
429 goto out;
430 }
431
432 if (bdp->d_fileno == 0) {
433 inp += reclen;
434 if (cookiep) {
435 off = *cookiep++;
436 ncookies--;
437 } else
438 off += reclen;
439
440 len -= reclen;
441 continue;
442 }
443
444 linuxreclen = (is64bit)
445 ? LINUX_RECLEN64(bdp->d_namlen)
446 : LINUX_RECLEN(bdp->d_namlen);
447
448 if (reclen > len || resid < linuxreclen) {
449 outp++;
450 break;
451 }
452
453 if (justone) {
454 /* readdir(2) case. */
455 linux_dirent = (struct l_dirent*)lbuf;
456 linux_dirent->d_ino = bdp->d_fileno;
457 linux_dirent->d_off = (l_off_t)linuxreclen;
458 linux_dirent->d_reclen = (l_ushort)bdp->d_namlen;
459 strlcpy(linux_dirent->d_name, bdp->d_name,
460 linuxreclen - offsetof(struct l_dirent, d_name));
461 error = copyout(linux_dirent, outp, linuxreclen);
462 }
463 if (is64bit) {
464 linux_dirent64 = (struct l_dirent64*)lbuf;
465 linux_dirent64->d_ino = bdp->d_fileno;
466 linux_dirent64->d_off = (cookiep)
467 ? (l_off_t)*cookiep
468 : (l_off_t)(off + reclen);
469 linux_dirent64->d_reclen = (l_ushort)linuxreclen;
470 linux_dirent64->d_type = bdp->d_type;
471 strlcpy(linux_dirent64->d_name, bdp->d_name,
472 linuxreclen - offsetof(struct l_dirent64, d_name));
473 error = copyout(linux_dirent64, outp, linuxreclen);
474 } else if (!justone) {
475 linux_dirent = (struct l_dirent*)lbuf;
476 linux_dirent->d_ino = bdp->d_fileno;
477 linux_dirent->d_off = (cookiep)
478 ? (l_off_t)*cookiep
479 : (l_off_t)(off + reclen);
480 linux_dirent->d_reclen = (l_ushort)linuxreclen;
481 /*
482 * Copy d_type to last byte of l_dirent buffer
483 */
484 lbuf[linuxreclen-1] = bdp->d_type;
485 strlcpy(linux_dirent->d_name, bdp->d_name,
486 linuxreclen - offsetof(struct l_dirent, d_name)-1);
487 error = copyout(linux_dirent, outp, linuxreclen);
488 }
489
490 if (error)
491 goto out;
492
493 inp += reclen;
494 if (cookiep) {
495 off = *cookiep++;
496 ncookies--;
497 } else
498 off += reclen;
499
500 outp += linuxreclen;
501 resid -= linuxreclen;
502 len -= reclen;
503 if (justone)
504 break;
505 }
506
507 if (outp == (caddr_t)args->dirent) {
508 nbytes = resid;
509 goto eof;
510 }
511
512 if (justone)
513 nbytes = resid + linuxreclen;
514
515 eof:
516 td->td_retval[0] = nbytes - resid;
517
518 out:
519 free(cookies, M_TEMP);
520
521 VOP_UNLOCK(vp, 0);
522 foffset_unlock(fp, off, 0);
523 fdrop(fp, td);
524 free(buf, M_LINUX);
525 free(lbuf, M_LINUX);
526 return (error);
527 }
528
529 int
530 linux_getdents(struct thread *td, struct linux_getdents_args *args)
531 {
532
533 #ifdef DEBUG
534 if (ldebug(getdents))
535 printf(ARGS(getdents, "%d, *, %d"), args->fd, args->count);
536 #endif
537
538 return (getdents_common(td, (struct linux_getdents64_args*)args, 0));
539 }
540
541 int
542 linux_getdents64(struct thread *td, struct linux_getdents64_args *args)
543 {
544
545 #ifdef DEBUG
546 if (ldebug(getdents64))
547 printf(ARGS(getdents64, "%d, *, %d"), args->fd, args->count);
548 #endif
549
550 return (getdents_common(td, args, 1));
551 }
552
553 /*
554 * These exist mainly for hooks for doing /compat/linux translation.
555 */
556
557 int
558 linux_access(struct thread *td, struct linux_access_args *args)
559 {
560 char *path;
561 int error;
562
563 /* linux convention */
564 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
565 return (EINVAL);
566
567 LCONVPATHEXIST(td, args->path, &path);
568
569 #ifdef DEBUG
570 if (ldebug(access))
571 printf(ARGS(access, "%s, %d"), path, args->amode);
572 #endif
573 error = kern_access(td, path, UIO_SYSSPACE, args->amode);
574 LFREEPATH(path);
575
576 return (error);
577 }
578
579 int
580 linux_faccessat(struct thread *td, struct linux_faccessat_args *args)
581 {
582 char *path;
583 int error, dfd;
584
585 /* linux convention */
586 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
587 return (EINVAL);
588
589 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
590 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
591
592 #ifdef DEBUG
593 if (ldebug(access))
594 printf(ARGS(access, "%s, %d"), path, args->amode);
595 #endif
596
597 error = kern_accessat(td, dfd, path, UIO_SYSSPACE, 0, args->amode);
598 LFREEPATH(path);
599
600 return (error);
601 }
602
603 int
604 linux_unlink(struct thread *td, struct linux_unlink_args *args)
605 {
606 char *path;
607 int error;
608 struct stat st;
609
610 LCONVPATHEXIST(td, args->path, &path);
611
612 #ifdef DEBUG
613 if (ldebug(unlink))
614 printf(ARGS(unlink, "%s"), path);
615 #endif
616
617 error = kern_unlink(td, path, UIO_SYSSPACE);
618 if (error == EPERM)
619 /* Introduce POSIX noncompliant behaviour of Linux */
620 if (kern_stat(td, path, UIO_SYSSPACE, &st) == 0)
621 if (S_ISDIR(st.st_mode))
622 error = EISDIR;
623 LFREEPATH(path);
624 return (error);
625 }
626
627 int
628 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args)
629 {
630 char *path;
631 int error, dfd;
632 struct stat st;
633
634 if (args->flag & ~LINUX_AT_REMOVEDIR)
635 return (EINVAL);
636
637 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
638 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
639
640 #ifdef DEBUG
641 if (ldebug(unlinkat))
642 printf(ARGS(unlinkat, "%s"), path);
643 #endif
644
645 if (args->flag & LINUX_AT_REMOVEDIR)
646 error = kern_rmdirat(td, dfd, path, UIO_SYSSPACE);
647 else
648 error = kern_unlinkat(td, dfd, path, UIO_SYSSPACE, 0);
649 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) {
650 /* Introduce POSIX noncompliant behaviour of Linux */
651 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path,
652 UIO_SYSSPACE, &st) == 0 && S_ISDIR(st.st_mode))
653 error = EISDIR;
654 }
655 LFREEPATH(path);
656 return (error);
657 }
658 int
659 linux_chdir(struct thread *td, struct linux_chdir_args *args)
660 {
661 char *path;
662 int error;
663
664 LCONVPATHEXIST(td, args->path, &path);
665
666 #ifdef DEBUG
667 if (ldebug(chdir))
668 printf(ARGS(chdir, "%s"), path);
669 #endif
670 error = kern_chdir(td, path, UIO_SYSSPACE);
671 LFREEPATH(path);
672 return (error);
673 }
674
675 int
676 linux_chmod(struct thread *td, struct linux_chmod_args *args)
677 {
678 char *path;
679 int error;
680
681 LCONVPATHEXIST(td, args->path, &path);
682
683 #ifdef DEBUG
684 if (ldebug(chmod))
685 printf(ARGS(chmod, "%s, %d"), path, args->mode);
686 #endif
687 error = kern_chmod(td, path, UIO_SYSSPACE, args->mode);
688 LFREEPATH(path);
689 return (error);
690 }
691
692 int
693 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args)
694 {
695 char *path;
696 int error, dfd;
697
698 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
699 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
700
701 #ifdef DEBUG
702 if (ldebug(fchmodat))
703 printf(ARGS(fchmodat, "%s, %d"), path, args->mode);
704 #endif
705
706 error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0);
707 LFREEPATH(path);
708 return (error);
709 }
710
711 int
712 linux_mkdir(struct thread *td, struct linux_mkdir_args *args)
713 {
714 char *path;
715 int error;
716
717 LCONVPATHCREAT(td, args->path, &path);
718
719 #ifdef DEBUG
720 if (ldebug(mkdir))
721 printf(ARGS(mkdir, "%s, %d"), path, args->mode);
722 #endif
723 error = kern_mkdir(td, path, UIO_SYSSPACE, args->mode);
724 LFREEPATH(path);
725 return (error);
726 }
727
728 int
729 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args)
730 {
731 char *path;
732 int error, dfd;
733
734 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
735 LCONVPATHCREAT_AT(td, args->pathname, &path, dfd);
736
737 #ifdef DEBUG
738 if (ldebug(mkdirat))
739 printf(ARGS(mkdirat, "%s, %d"), path, args->mode);
740 #endif
741 error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode);
742 LFREEPATH(path);
743 return (error);
744 }
745
746 int
747 linux_rmdir(struct thread *td, struct linux_rmdir_args *args)
748 {
749 char *path;
750 int error;
751
752 LCONVPATHEXIST(td, args->path, &path);
753
754 #ifdef DEBUG
755 if (ldebug(rmdir))
756 printf(ARGS(rmdir, "%s"), path);
757 #endif
758 error = kern_rmdir(td, path, UIO_SYSSPACE);
759 LFREEPATH(path);
760 return (error);
761 }
762
763 int
764 linux_rename(struct thread *td, struct linux_rename_args *args)
765 {
766 char *from, *to;
767 int error;
768
769 LCONVPATHEXIST(td, args->from, &from);
770 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
771 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
772 if (to == NULL) {
773 LFREEPATH(from);
774 return (error);
775 }
776
777 #ifdef DEBUG
778 if (ldebug(rename))
779 printf(ARGS(rename, "%s, %s"), from, to);
780 #endif
781 error = kern_rename(td, from, to, UIO_SYSSPACE);
782 LFREEPATH(from);
783 LFREEPATH(to);
784 return (error);
785 }
786
787 int
788 linux_renameat(struct thread *td, struct linux_renameat_args *args)
789 {
790 char *from, *to;
791 int error, olddfd, newdfd;
792
793 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
794 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
795 LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd);
796 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
797 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
798 if (to == NULL) {
799 LFREEPATH(from);
800 return (error);
801 }
802
803 #ifdef DEBUG
804 if (ldebug(renameat))
805 printf(ARGS(renameat, "%s, %s"), from, to);
806 #endif
807 error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE);
808 LFREEPATH(from);
809 LFREEPATH(to);
810 return (error);
811 }
812
813 int
814 linux_symlink(struct thread *td, struct linux_symlink_args *args)
815 {
816 char *path, *to;
817 int error;
818
819 LCONVPATHEXIST(td, args->path, &path);
820 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
821 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
822 if (to == NULL) {
823 LFREEPATH(path);
824 return (error);
825 }
826
827 #ifdef DEBUG
828 if (ldebug(symlink))
829 printf(ARGS(symlink, "%s, %s"), path, to);
830 #endif
831 error = kern_symlink(td, path, to, UIO_SYSSPACE);
832 LFREEPATH(path);
833 LFREEPATH(to);
834 return (error);
835 }
836
837 int
838 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args)
839 {
840 char *path, *to;
841 int error, dfd;
842
843 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
844 LCONVPATHEXIST_AT(td, args->oldname, &path, dfd);
845 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
846 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd);
847 if (to == NULL) {
848 LFREEPATH(path);
849 return (error);
850 }
851
852 #ifdef DEBUG
853 if (ldebug(symlinkat))
854 printf(ARGS(symlinkat, "%s, %s"), path, to);
855 #endif
856
857 error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE);
858 LFREEPATH(path);
859 LFREEPATH(to);
860 return (error);
861 }
862
863 int
864 linux_readlink(struct thread *td, struct linux_readlink_args *args)
865 {
866 char *name;
867 int error;
868
869 LCONVPATHEXIST(td, args->name, &name);
870
871 #ifdef DEBUG
872 if (ldebug(readlink))
873 printf(ARGS(readlink, "%s, %p, %d"), name, (void *)args->buf,
874 args->count);
875 #endif
876 error = kern_readlink(td, name, UIO_SYSSPACE, args->buf, UIO_USERSPACE,
877 args->count);
878 LFREEPATH(name);
879 return (error);
880 }
881
882 int
883 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args)
884 {
885 char *name;
886 int error, dfd;
887
888 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
889 LCONVPATHEXIST_AT(td, args->path, &name, dfd);
890
891 #ifdef DEBUG
892 if (ldebug(readlinkat))
893 printf(ARGS(readlinkat, "%s, %p, %d"), name, (void *)args->buf,
894 args->bufsiz);
895 #endif
896
897 error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf,
898 UIO_USERSPACE, args->bufsiz);
899 LFREEPATH(name);
900 return (error);
901 }
902
903 int
904 linux_truncate(struct thread *td, struct linux_truncate_args *args)
905 {
906 char *path;
907 int error;
908
909 LCONVPATHEXIST(td, args->path, &path);
910
911 #ifdef DEBUG
912 if (ldebug(truncate))
913 printf(ARGS(truncate, "%s, %ld"), path, (long)args->length);
914 #endif
915
916 error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
917 LFREEPATH(path);
918 return (error);
919 }
920
921 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
922 int
923 linux_truncate64(struct thread *td, struct linux_truncate64_args *args)
924 {
925 char *path;
926 int error;
927
928 LCONVPATHEXIST(td, args->path, &path);
929
930 #ifdef DEBUG
931 if (ldebug(truncate64))
932 printf(ARGS(truncate64, "%s, %jd"), path, args->length);
933 #endif
934
935 error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
936 LFREEPATH(path);
937 return (error);
938 }
939 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
940
941 int
942 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args)
943 {
944 struct ftruncate_args /* {
945 int fd;
946 int pad;
947 off_t length;
948 } */ nuap;
949
950 nuap.fd = args->fd;
951 nuap.length = args->length;
952 return (sys_ftruncate(td, &nuap));
953 }
954
955 int
956 linux_link(struct thread *td, struct linux_link_args *args)
957 {
958 char *path, *to;
959 int error;
960
961 LCONVPATHEXIST(td, args->path, &path);
962 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
963 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
964 if (to == NULL) {
965 LFREEPATH(path);
966 return (error);
967 }
968
969 #ifdef DEBUG
970 if (ldebug(link))
971 printf(ARGS(link, "%s, %s"), path, to);
972 #endif
973 error = kern_link(td, path, to, UIO_SYSSPACE);
974 LFREEPATH(path);
975 LFREEPATH(to);
976 return (error);
977 }
978
979 int
980 linux_linkat(struct thread *td, struct linux_linkat_args *args)
981 {
982 char *path, *to;
983 int error, olddfd, newdfd, follow;
984
985 if (args->flag & ~LINUX_AT_SYMLINK_FOLLOW)
986 return (EINVAL);
987
988 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
989 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
990 LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd);
991 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
992 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
993 if (to == NULL) {
994 LFREEPATH(path);
995 return (error);
996 }
997
998 #ifdef DEBUG
999 if (ldebug(linkat))
1000 printf(ARGS(linkat, "%i, %s, %i, %s, %i"), args->olddfd, path,
1001 args->newdfd, to, args->flag);
1002 #endif
1003
1004 follow = (args->flag & LINUX_AT_SYMLINK_FOLLOW) == 0 ? NOFOLLOW :
1005 FOLLOW;
1006 error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, follow);
1007 LFREEPATH(path);
1008 LFREEPATH(to);
1009 return (error);
1010 }
1011
1012 int
1013 linux_fdatasync(td, uap)
1014 struct thread *td;
1015 struct linux_fdatasync_args *uap;
1016 {
1017 struct fsync_args bsd;
1018
1019 bsd.fd = uap->fd;
1020 return sys_fsync(td, &bsd);
1021 }
1022
1023 int
1024 linux_pread(td, uap)
1025 struct thread *td;
1026 struct linux_pread_args *uap;
1027 {
1028 struct pread_args bsd;
1029 cap_rights_t rights;
1030 struct vnode *vp;
1031 int error;
1032
1033 bsd.fd = uap->fd;
1034 bsd.buf = uap->buf;
1035 bsd.nbyte = uap->nbyte;
1036 bsd.offset = uap->offset;
1037
1038 error = sys_pread(td, &bsd);
1039
1040 if (error == 0) {
1041 /* This seems to violate POSIX but linux does it */
1042 error = fgetvp(td, uap->fd,
1043 cap_rights_init(&rights, CAP_PREAD), &vp);
1044 if (error != 0)
1045 return (error);
1046 if (vp->v_type == VDIR) {
1047 vrele(vp);
1048 return (EISDIR);
1049 }
1050 vrele(vp);
1051 }
1052
1053 return (error);
1054 }
1055
1056 int
1057 linux_pwrite(td, uap)
1058 struct thread *td;
1059 struct linux_pwrite_args *uap;
1060 {
1061 struct pwrite_args bsd;
1062
1063 bsd.fd = uap->fd;
1064 bsd.buf = uap->buf;
1065 bsd.nbyte = uap->nbyte;
1066 bsd.offset = uap->offset;
1067 return sys_pwrite(td, &bsd);
1068 }
1069
1070 int
1071 linux_mount(struct thread *td, struct linux_mount_args *args)
1072 {
1073 char fstypename[MFSNAMELEN];
1074 char mntonname[MNAMELEN], mntfromname[MNAMELEN];
1075 int error;
1076 int fsflags;
1077
1078 error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1,
1079 NULL);
1080 if (error)
1081 return (error);
1082 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL);
1083 if (error)
1084 return (error);
1085 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL);
1086 if (error)
1087 return (error);
1088
1089 #ifdef DEBUG
1090 if (ldebug(mount))
1091 printf(ARGS(mount, "%s, %s, %s"),
1092 fstypename, mntfromname, mntonname);
1093 #endif
1094
1095 if (strcmp(fstypename, "ext2") == 0) {
1096 strcpy(fstypename, "ext2fs");
1097 } else if (strcmp(fstypename, "proc") == 0) {
1098 strcpy(fstypename, "linprocfs");
1099 } else if (strcmp(fstypename, "vfat") == 0) {
1100 strcpy(fstypename, "msdosfs");
1101 }
1102
1103 fsflags = 0;
1104
1105 if ((args->rwflag & 0xffff0000) == 0xc0ed0000) {
1106 /*
1107 * Linux SYNC flag is not included; the closest equivalent
1108 * FreeBSD has is !ASYNC, which is our default.
1109 */
1110 if (args->rwflag & LINUX_MS_RDONLY)
1111 fsflags |= MNT_RDONLY;
1112 if (args->rwflag & LINUX_MS_NOSUID)
1113 fsflags |= MNT_NOSUID;
1114 if (args->rwflag & LINUX_MS_NOEXEC)
1115 fsflags |= MNT_NOEXEC;
1116 if (args->rwflag & LINUX_MS_REMOUNT)
1117 fsflags |= MNT_UPDATE;
1118 }
1119
1120 error = kernel_vmount(fsflags,
1121 "fstype", fstypename,
1122 "fspath", mntonname,
1123 "from", mntfromname,
1124 NULL);
1125 return (error);
1126 }
1127
1128 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1129 int
1130 linux_oldumount(struct thread *td, struct linux_oldumount_args *args)
1131 {
1132 struct linux_umount_args args2;
1133
1134 args2.path = args->path;
1135 args2.flags = 0;
1136 return (linux_umount(td, &args2));
1137 }
1138 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1139
1140 int
1141 linux_umount(struct thread *td, struct linux_umount_args *args)
1142 {
1143 struct unmount_args bsd;
1144
1145 bsd.path = args->path;
1146 bsd.flags = args->flags; /* XXX correct? */
1147 return (sys_unmount(td, &bsd));
1148 }
1149
1150 /*
1151 * fcntl family of syscalls
1152 */
1153
1154 struct l_flock {
1155 l_short l_type;
1156 l_short l_whence;
1157 l_off_t l_start;
1158 l_off_t l_len;
1159 l_pid_t l_pid;
1160 }
1161 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1162 __packed
1163 #endif
1164 ;
1165
1166 static void
1167 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock)
1168 {
1169 switch (linux_flock->l_type) {
1170 case LINUX_F_RDLCK:
1171 bsd_flock->l_type = F_RDLCK;
1172 break;
1173 case LINUX_F_WRLCK:
1174 bsd_flock->l_type = F_WRLCK;
1175 break;
1176 case LINUX_F_UNLCK:
1177 bsd_flock->l_type = F_UNLCK;
1178 break;
1179 default:
1180 bsd_flock->l_type = -1;
1181 break;
1182 }
1183 bsd_flock->l_whence = linux_flock->l_whence;
1184 bsd_flock->l_start = (off_t)linux_flock->l_start;
1185 bsd_flock->l_len = (off_t)linux_flock->l_len;
1186 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1187 bsd_flock->l_sysid = 0;
1188 }
1189
1190 static void
1191 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock)
1192 {
1193 switch (bsd_flock->l_type) {
1194 case F_RDLCK:
1195 linux_flock->l_type = LINUX_F_RDLCK;
1196 break;
1197 case F_WRLCK:
1198 linux_flock->l_type = LINUX_F_WRLCK;
1199 break;
1200 case F_UNLCK:
1201 linux_flock->l_type = LINUX_F_UNLCK;
1202 break;
1203 }
1204 linux_flock->l_whence = bsd_flock->l_whence;
1205 linux_flock->l_start = (l_off_t)bsd_flock->l_start;
1206 linux_flock->l_len = (l_off_t)bsd_flock->l_len;
1207 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1208 }
1209
1210 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1211 struct l_flock64 {
1212 l_short l_type;
1213 l_short l_whence;
1214 l_loff_t l_start;
1215 l_loff_t l_len;
1216 l_pid_t l_pid;
1217 }
1218 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1219 __packed
1220 #endif
1221 ;
1222
1223 static void
1224 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock)
1225 {
1226 switch (linux_flock->l_type) {
1227 case LINUX_F_RDLCK:
1228 bsd_flock->l_type = F_RDLCK;
1229 break;
1230 case LINUX_F_WRLCK:
1231 bsd_flock->l_type = F_WRLCK;
1232 break;
1233 case LINUX_F_UNLCK:
1234 bsd_flock->l_type = F_UNLCK;
1235 break;
1236 default:
1237 bsd_flock->l_type = -1;
1238 break;
1239 }
1240 bsd_flock->l_whence = linux_flock->l_whence;
1241 bsd_flock->l_start = (off_t)linux_flock->l_start;
1242 bsd_flock->l_len = (off_t)linux_flock->l_len;
1243 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1244 bsd_flock->l_sysid = 0;
1245 }
1246
1247 static void
1248 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock)
1249 {
1250 switch (bsd_flock->l_type) {
1251 case F_RDLCK:
1252 linux_flock->l_type = LINUX_F_RDLCK;
1253 break;
1254 case F_WRLCK:
1255 linux_flock->l_type = LINUX_F_WRLCK;
1256 break;
1257 case F_UNLCK:
1258 linux_flock->l_type = LINUX_F_UNLCK;
1259 break;
1260 }
1261 linux_flock->l_whence = bsd_flock->l_whence;
1262 linux_flock->l_start = (l_loff_t)bsd_flock->l_start;
1263 linux_flock->l_len = (l_loff_t)bsd_flock->l_len;
1264 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1265 }
1266 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1267
1268 static int
1269 fcntl_common(struct thread *td, struct linux_fcntl_args *args)
1270 {
1271 struct l_flock linux_flock;
1272 struct flock bsd_flock;
1273 cap_rights_t rights;
1274 struct file *fp;
1275 long arg;
1276 int error, result;
1277
1278 switch (args->cmd) {
1279 case LINUX_F_DUPFD:
1280 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg));
1281
1282 case LINUX_F_GETFD:
1283 return (kern_fcntl(td, args->fd, F_GETFD, 0));
1284
1285 case LINUX_F_SETFD:
1286 return (kern_fcntl(td, args->fd, F_SETFD, args->arg));
1287
1288 case LINUX_F_GETFL:
1289 error = kern_fcntl(td, args->fd, F_GETFL, 0);
1290 result = td->td_retval[0];
1291 td->td_retval[0] = 0;
1292 if (result & O_RDONLY)
1293 td->td_retval[0] |= LINUX_O_RDONLY;
1294 if (result & O_WRONLY)
1295 td->td_retval[0] |= LINUX_O_WRONLY;
1296 if (result & O_RDWR)
1297 td->td_retval[0] |= LINUX_O_RDWR;
1298 if (result & O_NDELAY)
1299 td->td_retval[0] |= LINUX_O_NONBLOCK;
1300 if (result & O_APPEND)
1301 td->td_retval[0] |= LINUX_O_APPEND;
1302 if (result & O_FSYNC)
1303 td->td_retval[0] |= LINUX_O_SYNC;
1304 if (result & O_ASYNC)
1305 td->td_retval[0] |= LINUX_FASYNC;
1306 #ifdef LINUX_O_NOFOLLOW
1307 if (result & O_NOFOLLOW)
1308 td->td_retval[0] |= LINUX_O_NOFOLLOW;
1309 #endif
1310 #ifdef LINUX_O_DIRECT
1311 if (result & O_DIRECT)
1312 td->td_retval[0] |= LINUX_O_DIRECT;
1313 #endif
1314 return (error);
1315
1316 case LINUX_F_SETFL:
1317 arg = 0;
1318 if (args->arg & LINUX_O_NDELAY)
1319 arg |= O_NONBLOCK;
1320 if (args->arg & LINUX_O_APPEND)
1321 arg |= O_APPEND;
1322 if (args->arg & LINUX_O_SYNC)
1323 arg |= O_FSYNC;
1324 if (args->arg & LINUX_FASYNC)
1325 arg |= O_ASYNC;
1326 #ifdef LINUX_O_NOFOLLOW
1327 if (args->arg & LINUX_O_NOFOLLOW)
1328 arg |= O_NOFOLLOW;
1329 #endif
1330 #ifdef LINUX_O_DIRECT
1331 if (args->arg & LINUX_O_DIRECT)
1332 arg |= O_DIRECT;
1333 #endif
1334 return (kern_fcntl(td, args->fd, F_SETFL, arg));
1335
1336 case LINUX_F_GETLK:
1337 error = copyin((void *)args->arg, &linux_flock,
1338 sizeof(linux_flock));
1339 if (error)
1340 return (error);
1341 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1342 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1343 if (error)
1344 return (error);
1345 bsd_to_linux_flock(&bsd_flock, &linux_flock);
1346 return (copyout(&linux_flock, (void *)args->arg,
1347 sizeof(linux_flock)));
1348
1349 case LINUX_F_SETLK:
1350 error = copyin((void *)args->arg, &linux_flock,
1351 sizeof(linux_flock));
1352 if (error)
1353 return (error);
1354 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1355 return (kern_fcntl(td, args->fd, F_SETLK,
1356 (intptr_t)&bsd_flock));
1357
1358 case LINUX_F_SETLKW:
1359 error = copyin((void *)args->arg, &linux_flock,
1360 sizeof(linux_flock));
1361 if (error)
1362 return (error);
1363 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1364 return (kern_fcntl(td, args->fd, F_SETLKW,
1365 (intptr_t)&bsd_flock));
1366
1367 case LINUX_F_GETOWN:
1368 return (kern_fcntl(td, args->fd, F_GETOWN, 0));
1369
1370 case LINUX_F_SETOWN:
1371 /*
1372 * XXX some Linux applications depend on F_SETOWN having no
1373 * significant effect for pipes (SIGIO is not delivered for
1374 * pipes under Linux-2.2.35 at least).
1375 */
1376 error = fget(td, args->fd,
1377 cap_rights_init(&rights, CAP_FCNTL), &fp);
1378 if (error)
1379 return (error);
1380 if (fp->f_type == DTYPE_PIPE) {
1381 fdrop(fp, td);
1382 return (EINVAL);
1383 }
1384 fdrop(fp, td);
1385
1386 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg));
1387
1388 case LINUX_F_DUPFD_CLOEXEC:
1389 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg));
1390 }
1391
1392 return (EINVAL);
1393 }
1394
1395 int
1396 linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
1397 {
1398
1399 #ifdef DEBUG
1400 if (ldebug(fcntl))
1401 printf(ARGS(fcntl, "%d, %08x, *"), args->fd, args->cmd);
1402 #endif
1403
1404 return (fcntl_common(td, args));
1405 }
1406
1407 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1408 int
1409 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args)
1410 {
1411 struct l_flock64 linux_flock;
1412 struct flock bsd_flock;
1413 struct linux_fcntl_args fcntl_args;
1414 int error;
1415
1416 #ifdef DEBUG
1417 if (ldebug(fcntl64))
1418 printf(ARGS(fcntl64, "%d, %08x, *"), args->fd, args->cmd);
1419 #endif
1420
1421 switch (args->cmd) {
1422 case LINUX_F_GETLK64:
1423 error = copyin((void *)args->arg, &linux_flock,
1424 sizeof(linux_flock));
1425 if (error)
1426 return (error);
1427 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1428 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1429 if (error)
1430 return (error);
1431 bsd_to_linux_flock64(&bsd_flock, &linux_flock);
1432 return (copyout(&linux_flock, (void *)args->arg,
1433 sizeof(linux_flock)));
1434
1435 case LINUX_F_SETLK64:
1436 error = copyin((void *)args->arg, &linux_flock,
1437 sizeof(linux_flock));
1438 if (error)
1439 return (error);
1440 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1441 return (kern_fcntl(td, args->fd, F_SETLK,
1442 (intptr_t)&bsd_flock));
1443
1444 case LINUX_F_SETLKW64:
1445 error = copyin((void *)args->arg, &linux_flock,
1446 sizeof(linux_flock));
1447 if (error)
1448 return (error);
1449 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1450 return (kern_fcntl(td, args->fd, F_SETLKW,
1451 (intptr_t)&bsd_flock));
1452 }
1453
1454 fcntl_args.fd = args->fd;
1455 fcntl_args.cmd = args->cmd;
1456 fcntl_args.arg = args->arg;
1457 return (fcntl_common(td, &fcntl_args));
1458 }
1459 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1460
1461 int
1462 linux_chown(struct thread *td, struct linux_chown_args *args)
1463 {
1464 char *path;
1465 int error;
1466
1467 LCONVPATHEXIST(td, args->path, &path);
1468
1469 #ifdef DEBUG
1470 if (ldebug(chown))
1471 printf(ARGS(chown, "%s, %d, %d"), path, args->uid, args->gid);
1472 #endif
1473 error = kern_chown(td, path, UIO_SYSSPACE, args->uid, args->gid);
1474 LFREEPATH(path);
1475 return (error);
1476 }
1477
1478 int
1479 linux_fchownat(struct thread *td, struct linux_fchownat_args *args)
1480 {
1481 char *path;
1482 int error, dfd, flag;
1483
1484 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
1485 return (EINVAL);
1486
1487 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
1488 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
1489
1490 #ifdef DEBUG
1491 if (ldebug(fchownat))
1492 printf(ARGS(fchownat, "%s, %d, %d"), path, args->uid, args->gid);
1493 #endif
1494
1495 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 :
1496 AT_SYMLINK_NOFOLLOW;
1497 error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid,
1498 flag);
1499 LFREEPATH(path);
1500 return (error);
1501 }
1502
1503 int
1504 linux_lchown(struct thread *td, struct linux_lchown_args *args)
1505 {
1506 char *path;
1507 int error;
1508
1509 LCONVPATHEXIST(td, args->path, &path);
1510
1511 #ifdef DEBUG
1512 if (ldebug(lchown))
1513 printf(ARGS(lchown, "%s, %d, %d"), path, args->uid, args->gid);
1514 #endif
1515 error = kern_lchown(td, path, UIO_SYSSPACE, args->uid, args->gid);
1516 LFREEPATH(path);
1517 return (error);
1518 }
1519
1520 static int
1521 convert_fadvice(int advice)
1522 {
1523 switch (advice) {
1524 case LINUX_POSIX_FADV_NORMAL:
1525 return (POSIX_FADV_NORMAL);
1526 case LINUX_POSIX_FADV_RANDOM:
1527 return (POSIX_FADV_RANDOM);
1528 case LINUX_POSIX_FADV_SEQUENTIAL:
1529 return (POSIX_FADV_SEQUENTIAL);
1530 case LINUX_POSIX_FADV_WILLNEED:
1531 return (POSIX_FADV_WILLNEED);
1532 case LINUX_POSIX_FADV_DONTNEED:
1533 return (POSIX_FADV_DONTNEED);
1534 case LINUX_POSIX_FADV_NOREUSE:
1535 return (POSIX_FADV_NOREUSE);
1536 default:
1537 return (-1);
1538 }
1539 }
1540
1541 int
1542 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args)
1543 {
1544 int advice;
1545
1546 advice = convert_fadvice(args->advice);
1547 if (advice == -1)
1548 return (EINVAL);
1549 return (kern_posix_fadvise(td, args->fd, args->offset, args->len,
1550 advice));
1551 }
1552
1553 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1554 int
1555 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args)
1556 {
1557 int advice;
1558
1559 advice = convert_fadvice(args->advice);
1560 if (advice == -1)
1561 return (EINVAL);
1562 return (kern_posix_fadvise(td, args->fd, args->offset, args->len,
1563 advice));
1564 }
1565 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1566
1567 int
1568 linux_pipe(struct thread *td, struct linux_pipe_args *args)
1569 {
1570 int fildes[2];
1571 int error;
1572
1573 #ifdef DEBUG
1574 if (ldebug(pipe))
1575 printf(ARGS(pipe, "*"));
1576 #endif
1577
1578 error = kern_pipe2(td, fildes, 0);
1579 if (error)
1580 return (error);
1581
1582 /* XXX: Close descriptors on error. */
1583 return (copyout(fildes, args->pipefds, sizeof(fildes)));
1584 }
1585
1586 int
1587 linux_pipe2(struct thread *td, struct linux_pipe2_args *args)
1588 {
1589 int fildes[2];
1590 int error, flags;
1591
1592 #ifdef DEBUG
1593 if (ldebug(pipe2))
1594 printf(ARGS(pipe2, "*, %d"), args->flags);
1595 #endif
1596
1597 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0)
1598 return (EINVAL);
1599
1600 flags = 0;
1601 if ((args->flags & LINUX_O_NONBLOCK) != 0)
1602 flags |= O_NONBLOCK;
1603 if ((args->flags & LINUX_O_CLOEXEC) != 0)
1604 flags |= O_CLOEXEC;
1605 error = kern_pipe2(td, fildes, flags);
1606 if (error)
1607 return (error);
1608
1609 /* XXX: Close descriptors on error. */
1610 return (copyout(fildes, args->pipefds, sizeof(fildes)));
1611 }
1612
1613 int
1614 linux_dup3(struct thread *td, struct linux_dup3_args *args)
1615 {
1616 int cmd;
1617 intptr_t newfd;
1618
1619 if (args->oldfd == args->newfd)
1620 return (EINVAL);
1621 if ((args->flags & ~LINUX_O_CLOEXEC) != 0)
1622 return (EINVAL);
1623 if (args->flags & LINUX_O_CLOEXEC)
1624 cmd = F_DUP2FD_CLOEXEC;
1625 else
1626 cmd = F_DUP2FD;
1627
1628 newfd = args->newfd;
1629 return (kern_fcntl(td, args->oldfd, cmd, newfd));
1630 }
1631
1632 int
1633 linux_fallocate(struct thread *td, struct linux_fallocate_args *args)
1634 {
1635
1636 /*
1637 * We emulate only posix_fallocate system call for which
1638 * mode should be 0.
1639 */
1640 if (args->mode != 0)
1641 return (ENOSYS);
1642
1643 return (kern_posix_fallocate(td, args->fd, args->offset,
1644 args->len));
1645 }
Cache object: 7fba89a90bafba79c49673bfcf7624ef
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