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/10.4/sys/compat/linux/linux_file.c 301424 2016-06-05 06:02:37Z 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 #ifdef DEBUG
77 if (ldebug(creat))
78 printf(ARGS(creat, "%s, %d"), path, args->mode);
79 #endif
80 error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE,
81 O_WRONLY | O_CREAT | O_TRUNC, args->mode);
82 LFREEPATH(path);
83 return (error);
84 }
85
86
87 static int
88 linux_common_open(struct thread *td, int dirfd, char *path, int l_flags, int mode)
89 {
90 cap_rights_t rights;
91 struct proc *p = td->td_proc;
92 struct file *fp;
93 int fd;
94 int bsd_flags, error;
95
96 bsd_flags = 0;
97 switch (l_flags & LINUX_O_ACCMODE) {
98 case LINUX_O_WRONLY:
99 bsd_flags |= O_WRONLY;
100 break;
101 case LINUX_O_RDWR:
102 bsd_flags |= O_RDWR;
103 break;
104 default:
105 bsd_flags |= O_RDONLY;
106 }
107 if (l_flags & LINUX_O_NDELAY)
108 bsd_flags |= O_NONBLOCK;
109 if (l_flags & LINUX_O_APPEND)
110 bsd_flags |= O_APPEND;
111 if (l_flags & LINUX_O_SYNC)
112 bsd_flags |= O_FSYNC;
113 if (l_flags & LINUX_O_NONBLOCK)
114 bsd_flags |= O_NONBLOCK;
115 if (l_flags & LINUX_FASYNC)
116 bsd_flags |= O_ASYNC;
117 if (l_flags & LINUX_O_CREAT)
118 bsd_flags |= O_CREAT;
119 if (l_flags & LINUX_O_TRUNC)
120 bsd_flags |= O_TRUNC;
121 if (l_flags & LINUX_O_EXCL)
122 bsd_flags |= O_EXCL;
123 if (l_flags & LINUX_O_NOCTTY)
124 bsd_flags |= O_NOCTTY;
125 if (l_flags & LINUX_O_DIRECT)
126 bsd_flags |= O_DIRECT;
127 if (l_flags & LINUX_O_NOFOLLOW)
128 bsd_flags |= O_NOFOLLOW;
129 if (l_flags & LINUX_O_DIRECTORY)
130 bsd_flags |= O_DIRECTORY;
131 /* XXX LINUX_O_NOATIME: unable to be easily implemented. */
132
133 error = kern_openat(td, dirfd, path, UIO_SYSSPACE, bsd_flags, mode);
134 if (error != 0)
135 goto done;
136 if (bsd_flags & O_NOCTTY)
137 goto done;
138
139 /*
140 * XXX In between kern_open() and fget(), another process
141 * having the same filedesc could use that fd without
142 * checking below.
143 */
144 fd = td->td_retval[0];
145 if (fget(td, fd, cap_rights_init(&rights, CAP_IOCTL), &fp) == 0) {
146 if (fp->f_type != DTYPE_VNODE) {
147 fdrop(fp, td);
148 goto done;
149 }
150 sx_slock(&proctree_lock);
151 PROC_LOCK(p);
152 if (SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
153 PROC_UNLOCK(p);
154 sx_sunlock(&proctree_lock);
155 /* XXXPJD: Verify if TIOCSCTTY is allowed. */
156 (void) fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0,
157 td->td_ucred, td);
158 } else {
159 PROC_UNLOCK(p);
160 sx_sunlock(&proctree_lock);
161 }
162 fdrop(fp, td);
163 }
164
165 done:
166 #ifdef DEBUG
167 if (ldebug(open))
168 printf(LMSG("open returns error %d"), error);
169 #endif
170 LFREEPATH(path);
171 return (error);
172 }
173
174 int
175 linux_openat(struct thread *td, struct linux_openat_args *args)
176 {
177 char *path;
178 int dfd;
179
180 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
181 if (args->flags & LINUX_O_CREAT)
182 LCONVPATH_AT(td, args->filename, &path, 1, dfd);
183 else
184 LCONVPATH_AT(td, args->filename, &path, 0, dfd);
185 #ifdef DEBUG
186 if (ldebug(openat))
187 printf(ARGS(openat, "%i, %s, 0x%x, 0x%x"), args->dfd,
188 path, args->flags, args->mode);
189 #endif
190 return (linux_common_open(td, dfd, path, args->flags, args->mode));
191 }
192
193 int
194 linux_open(struct thread *td, struct linux_open_args *args)
195 {
196 char *path;
197
198 if (args->flags & LINUX_O_CREAT)
199 LCONVPATHCREAT(td, args->path, &path);
200 else
201 LCONVPATHEXIST(td, args->path, &path);
202 #ifdef DEBUG
203 if (ldebug(open))
204 printf(ARGS(open, "%s, 0x%x, 0x%x"),
205 path, args->flags, args->mode);
206 #endif
207 return (linux_common_open(td, AT_FDCWD, path, args->flags, args->mode));
208 }
209
210 int
211 linux_lseek(struct thread *td, struct linux_lseek_args *args)
212 {
213 struct lseek_args /* {
214 int fd;
215 int pad;
216 off_t offset;
217 int whence;
218 } */ tmp_args;
219 int error;
220
221 #ifdef DEBUG
222 if (ldebug(lseek))
223 printf(ARGS(lseek, "%d, %ld, %d"),
224 args->fdes, (long)args->off, args->whence);
225 #endif
226 tmp_args.fd = args->fdes;
227 tmp_args.offset = (off_t)args->off;
228 tmp_args.whence = args->whence;
229 error = sys_lseek(td, &tmp_args);
230 return (error);
231 }
232
233 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
234 int
235 linux_llseek(struct thread *td, struct linux_llseek_args *args)
236 {
237 struct lseek_args bsd_args;
238 int error;
239 off_t off;
240
241 #ifdef DEBUG
242 if (ldebug(llseek))
243 printf(ARGS(llseek, "%d, %d:%d, %d"),
244 args->fd, args->ohigh, args->olow, args->whence);
245 #endif
246 off = (args->olow) | (((off_t) args->ohigh) << 32);
247
248 bsd_args.fd = args->fd;
249 bsd_args.offset = off;
250 bsd_args.whence = args->whence;
251
252 if ((error = sys_lseek(td, &bsd_args)))
253 return (error);
254
255 if ((error = copyout(td->td_retval, args->res, sizeof (off_t))))
256 return (error);
257
258 td->td_retval[0] = 0;
259 return (0);
260 }
261
262 int
263 linux_readdir(struct thread *td, struct linux_readdir_args *args)
264 {
265 struct linux_getdents_args lda;
266
267 lda.fd = args->fd;
268 lda.dent = args->dent;
269 lda.count = 1;
270 return (linux_getdents(td, &lda));
271 }
272 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
273
274 /*
275 * Note that linux_getdents(2) and linux_getdents64(2) have the same
276 * arguments. They only differ in the definition of struct dirent they
277 * operate on. We use this to common the code, with the exception of
278 * accessing struct dirent. Note that linux_readdir(2) is implemented
279 * by means of linux_getdents(2). In this case we never operate on
280 * struct dirent64 and thus don't need to handle it...
281 */
282
283 struct l_dirent {
284 l_ulong d_ino;
285 l_off_t d_off;
286 l_ushort d_reclen;
287 char d_name[LINUX_NAME_MAX + 1];
288 };
289
290 struct l_dirent64 {
291 uint64_t d_ino;
292 int64_t d_off;
293 l_ushort d_reclen;
294 u_char d_type;
295 char d_name[LINUX_NAME_MAX + 1];
296 };
297
298 /*
299 * Linux uses the last byte in the dirent buffer to store d_type,
300 * at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes.
301 */
302 #define LINUX_RECLEN(namlen) \
303 roundup(offsetof(struct l_dirent, d_name) + (namlen) + 2, sizeof(l_ulong))
304
305 #define LINUX_RECLEN64(namlen) \
306 roundup(offsetof(struct l_dirent64, d_name) + (namlen) + 1, \
307 sizeof(uint64_t))
308
309 #define LINUX_MAXRECLEN max(LINUX_RECLEN(LINUX_NAME_MAX), \
310 LINUX_RECLEN64(LINUX_NAME_MAX))
311 #define LINUX_DIRBLKSIZ 512
312
313 static int
314 getdents_common(struct thread *td, struct linux_getdents64_args *args,
315 int is64bit)
316 {
317 struct dirent *bdp;
318 struct vnode *vp;
319 caddr_t inp, buf; /* BSD-format */
320 int len, reclen; /* BSD-format */
321 caddr_t outp; /* Linux-format */
322 int resid, linuxreclen=0; /* Linux-format */
323 caddr_t lbuf; /* Linux-format */
324 cap_rights_t rights;
325 struct file *fp;
326 struct uio auio;
327 struct iovec aiov;
328 off_t off;
329 struct l_dirent *linux_dirent;
330 struct l_dirent64 *linux_dirent64;
331 int buflen, error, eofflag, nbytes, justone;
332 u_long *cookies = NULL, *cookiep;
333 int ncookies;
334
335 nbytes = args->count;
336 if (nbytes == 1) {
337 /* readdir(2) case. Always struct dirent. */
338 if (is64bit)
339 return (EINVAL);
340 nbytes = sizeof(*linux_dirent);
341 justone = 1;
342 } else
343 justone = 0;
344
345 error = getvnode(td->td_proc->p_fd, args->fd,
346 cap_rights_init(&rights, CAP_READ), &fp);
347 if (error != 0)
348 return (error);
349
350 if ((fp->f_flag & FREAD) == 0) {
351 fdrop(fp, td);
352 return (EBADF);
353 }
354
355 off = foffset_lock(fp, 0);
356 vp = fp->f_vnode;
357 if (vp->v_type != VDIR) {
358 foffset_unlock(fp, off, 0);
359 fdrop(fp, td);
360 return (EINVAL);
361 }
362
363
364 buflen = max(LINUX_DIRBLKSIZ, nbytes);
365 buflen = min(buflen, MAXBSIZE);
366 buf = malloc(buflen, M_LINUX, M_WAITOK);
367 lbuf = malloc(LINUX_MAXRECLEN, M_LINUX, M_WAITOK | M_ZERO);
368 vn_lock(vp, LK_SHARED | LK_RETRY);
369
370 aiov.iov_base = buf;
371 aiov.iov_len = buflen;
372 auio.uio_iov = &aiov;
373 auio.uio_iovcnt = 1;
374 auio.uio_rw = UIO_READ;
375 auio.uio_segflg = UIO_SYSSPACE;
376 auio.uio_td = td;
377 auio.uio_resid = buflen;
378 auio.uio_offset = off;
379
380 #ifdef MAC
381 /*
382 * Do directory search MAC check using non-cached credentials.
383 */
384 if ((error = mac_vnode_check_readdir(td->td_ucred, vp)))
385 goto out;
386 #endif /* MAC */
387 if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies,
388 &cookies)))
389 goto out;
390
391 inp = buf;
392 outp = (caddr_t)args->dirent;
393 resid = nbytes;
394 if ((len = buflen - auio.uio_resid) <= 0)
395 goto eof;
396
397 cookiep = cookies;
398
399 if (cookies) {
400 /*
401 * When using cookies, the vfs has the option of reading from
402 * a different offset than that supplied (UFS truncates the
403 * offset to a block boundary to make sure that it never reads
404 * partway through a directory entry, even if the directory
405 * has been compacted).
406 */
407 while (len > 0 && ncookies > 0 && *cookiep <= off) {
408 bdp = (struct dirent *) inp;
409 len -= bdp->d_reclen;
410 inp += bdp->d_reclen;
411 cookiep++;
412 ncookies--;
413 }
414 }
415
416 while (len > 0) {
417 if (cookiep && ncookies == 0)
418 break;
419 bdp = (struct dirent *) inp;
420 reclen = bdp->d_reclen;
421 if (reclen & 3) {
422 error = EFAULT;
423 goto out;
424 }
425
426 if (bdp->d_fileno == 0) {
427 inp += reclen;
428 if (cookiep) {
429 off = *cookiep++;
430 ncookies--;
431 } else
432 off += reclen;
433
434 len -= reclen;
435 continue;
436 }
437
438 linuxreclen = (is64bit)
439 ? LINUX_RECLEN64(bdp->d_namlen)
440 : LINUX_RECLEN(bdp->d_namlen);
441
442 if (reclen > len || resid < linuxreclen) {
443 outp++;
444 break;
445 }
446
447 if (justone) {
448 /* readdir(2) case. */
449 linux_dirent = (struct l_dirent*)lbuf;
450 linux_dirent->d_ino = bdp->d_fileno;
451 linux_dirent->d_off = (l_off_t)linuxreclen;
452 linux_dirent->d_reclen = (l_ushort)bdp->d_namlen;
453 strlcpy(linux_dirent->d_name, bdp->d_name,
454 linuxreclen - offsetof(struct l_dirent, d_name));
455 error = copyout(linux_dirent, outp, linuxreclen);
456 }
457 if (is64bit) {
458 linux_dirent64 = (struct l_dirent64*)lbuf;
459 linux_dirent64->d_ino = bdp->d_fileno;
460 linux_dirent64->d_off = (cookiep)
461 ? (l_off_t)*cookiep
462 : (l_off_t)(off + reclen);
463 linux_dirent64->d_reclen = (l_ushort)linuxreclen;
464 linux_dirent64->d_type = bdp->d_type;
465 strlcpy(linux_dirent64->d_name, bdp->d_name,
466 linuxreclen - offsetof(struct l_dirent64, d_name));
467 error = copyout(linux_dirent64, outp, linuxreclen);
468 } else if (!justone) {
469 linux_dirent = (struct l_dirent*)lbuf;
470 linux_dirent->d_ino = bdp->d_fileno;
471 linux_dirent->d_off = (cookiep)
472 ? (l_off_t)*cookiep
473 : (l_off_t)(off + reclen);
474 linux_dirent->d_reclen = (l_ushort)linuxreclen;
475 /*
476 * Copy d_type to last byte of l_dirent buffer
477 */
478 lbuf[linuxreclen-1] = bdp->d_type;
479 strlcpy(linux_dirent->d_name, bdp->d_name,
480 linuxreclen - offsetof(struct l_dirent, d_name)-1);
481 error = copyout(linux_dirent, outp, linuxreclen);
482 }
483
484 if (error)
485 goto out;
486
487 inp += reclen;
488 if (cookiep) {
489 off = *cookiep++;
490 ncookies--;
491 } else
492 off += reclen;
493
494 outp += linuxreclen;
495 resid -= linuxreclen;
496 len -= reclen;
497 if (justone)
498 break;
499 }
500
501 if (outp == (caddr_t)args->dirent) {
502 nbytes = resid;
503 goto eof;
504 }
505
506 if (justone)
507 nbytes = resid + linuxreclen;
508
509 eof:
510 td->td_retval[0] = nbytes - resid;
511
512 out:
513 free(cookies, M_TEMP);
514
515 VOP_UNLOCK(vp, 0);
516 foffset_unlock(fp, off, 0);
517 fdrop(fp, td);
518 free(buf, M_LINUX);
519 free(lbuf, M_LINUX);
520 return (error);
521 }
522
523 int
524 linux_getdents(struct thread *td, struct linux_getdents_args *args)
525 {
526
527 #ifdef DEBUG
528 if (ldebug(getdents))
529 printf(ARGS(getdents, "%d, *, %d"), args->fd, args->count);
530 #endif
531
532 return (getdents_common(td, (struct linux_getdents64_args*)args, 0));
533 }
534
535 int
536 linux_getdents64(struct thread *td, struct linux_getdents64_args *args)
537 {
538
539 #ifdef DEBUG
540 if (ldebug(getdents64))
541 printf(ARGS(getdents64, "%d, *, %d"), args->fd, args->count);
542 #endif
543
544 return (getdents_common(td, args, 1));
545 }
546
547 /*
548 * These exist mainly for hooks for doing /compat/linux translation.
549 */
550
551 int
552 linux_access(struct thread *td, struct linux_access_args *args)
553 {
554 char *path;
555 int error;
556
557 /* linux convention */
558 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
559 return (EINVAL);
560
561 LCONVPATHEXIST(td, args->path, &path);
562
563 #ifdef DEBUG
564 if (ldebug(access))
565 printf(ARGS(access, "%s, %d"), path, args->amode);
566 #endif
567 error = kern_access(td, path, UIO_SYSSPACE, args->amode);
568 LFREEPATH(path);
569
570 return (error);
571 }
572
573 int
574 linux_faccessat(struct thread *td, struct linux_faccessat_args *args)
575 {
576 char *path;
577 int error, dfd;
578
579 /* linux convention */
580 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
581 return (EINVAL);
582
583 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
584 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
585
586 #ifdef DEBUG
587 if (ldebug(access))
588 printf(ARGS(access, "%s, %d"), path, args->amode);
589 #endif
590
591 error = kern_accessat(td, dfd, path, UIO_SYSSPACE, 0, args->amode);
592 LFREEPATH(path);
593
594 return (error);
595 }
596
597 int
598 linux_unlink(struct thread *td, struct linux_unlink_args *args)
599 {
600 char *path;
601 int error;
602 struct stat st;
603
604 LCONVPATHEXIST(td, args->path, &path);
605
606 #ifdef DEBUG
607 if (ldebug(unlink))
608 printf(ARGS(unlink, "%s"), path);
609 #endif
610
611 error = kern_unlink(td, path, UIO_SYSSPACE);
612 if (error == EPERM)
613 /* Introduce POSIX noncompliant behaviour of Linux */
614 if (kern_stat(td, path, UIO_SYSSPACE, &st) == 0)
615 if (S_ISDIR(st.st_mode))
616 error = EISDIR;
617 LFREEPATH(path);
618 return (error);
619 }
620
621 int
622 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args)
623 {
624 char *path;
625 int error, dfd;
626 struct stat st;
627
628 if (args->flag & ~LINUX_AT_REMOVEDIR)
629 return (EINVAL);
630
631 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
632 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
633
634 #ifdef DEBUG
635 if (ldebug(unlinkat))
636 printf(ARGS(unlinkat, "%s"), path);
637 #endif
638
639 if (args->flag & LINUX_AT_REMOVEDIR)
640 error = kern_rmdirat(td, dfd, path, UIO_SYSSPACE);
641 else
642 error = kern_unlinkat(td, dfd, path, UIO_SYSSPACE, 0);
643 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) {
644 /* Introduce POSIX noncompliant behaviour of Linux */
645 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path,
646 UIO_SYSSPACE, &st) == 0 && S_ISDIR(st.st_mode))
647 error = EISDIR;
648 }
649 LFREEPATH(path);
650 return (error);
651 }
652 int
653 linux_chdir(struct thread *td, struct linux_chdir_args *args)
654 {
655 char *path;
656 int error;
657
658 LCONVPATHEXIST(td, args->path, &path);
659
660 #ifdef DEBUG
661 if (ldebug(chdir))
662 printf(ARGS(chdir, "%s"), path);
663 #endif
664 error = kern_chdir(td, path, UIO_SYSSPACE);
665 LFREEPATH(path);
666 return (error);
667 }
668
669 int
670 linux_chmod(struct thread *td, struct linux_chmod_args *args)
671 {
672 char *path;
673 int error;
674
675 LCONVPATHEXIST(td, args->path, &path);
676
677 #ifdef DEBUG
678 if (ldebug(chmod))
679 printf(ARGS(chmod, "%s, %d"), path, args->mode);
680 #endif
681 error = kern_chmod(td, path, UIO_SYSSPACE, args->mode);
682 LFREEPATH(path);
683 return (error);
684 }
685
686 int
687 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args)
688 {
689 char *path;
690 int error, dfd;
691
692 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
693 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
694
695 #ifdef DEBUG
696 if (ldebug(fchmodat))
697 printf(ARGS(fchmodat, "%s, %d"), path, args->mode);
698 #endif
699
700 error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0);
701 LFREEPATH(path);
702 return (error);
703 }
704
705 int
706 linux_mkdir(struct thread *td, struct linux_mkdir_args *args)
707 {
708 char *path;
709 int error;
710
711 LCONVPATHCREAT(td, args->path, &path);
712
713 #ifdef DEBUG
714 if (ldebug(mkdir))
715 printf(ARGS(mkdir, "%s, %d"), path, args->mode);
716 #endif
717 error = kern_mkdir(td, path, UIO_SYSSPACE, args->mode);
718 LFREEPATH(path);
719 return (error);
720 }
721
722 int
723 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args)
724 {
725 char *path;
726 int error, dfd;
727
728 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
729 LCONVPATHCREAT_AT(td, args->pathname, &path, dfd);
730
731 #ifdef DEBUG
732 if (ldebug(mkdirat))
733 printf(ARGS(mkdirat, "%s, %d"), path, args->mode);
734 #endif
735 error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode);
736 LFREEPATH(path);
737 return (error);
738 }
739
740 int
741 linux_rmdir(struct thread *td, struct linux_rmdir_args *args)
742 {
743 char *path;
744 int error;
745
746 LCONVPATHEXIST(td, args->path, &path);
747
748 #ifdef DEBUG
749 if (ldebug(rmdir))
750 printf(ARGS(rmdir, "%s"), path);
751 #endif
752 error = kern_rmdir(td, path, UIO_SYSSPACE);
753 LFREEPATH(path);
754 return (error);
755 }
756
757 int
758 linux_rename(struct thread *td, struct linux_rename_args *args)
759 {
760 char *from, *to;
761 int error;
762
763 LCONVPATHEXIST(td, args->from, &from);
764 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
765 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
766 if (to == NULL) {
767 LFREEPATH(from);
768 return (error);
769 }
770
771 #ifdef DEBUG
772 if (ldebug(rename))
773 printf(ARGS(rename, "%s, %s"), from, to);
774 #endif
775 error = kern_rename(td, from, to, UIO_SYSSPACE);
776 LFREEPATH(from);
777 LFREEPATH(to);
778 return (error);
779 }
780
781 int
782 linux_renameat(struct thread *td, struct linux_renameat_args *args)
783 {
784 char *from, *to;
785 int error, olddfd, newdfd;
786
787 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
788 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
789 LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd);
790 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
791 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
792 if (to == NULL) {
793 LFREEPATH(from);
794 return (error);
795 }
796
797 #ifdef DEBUG
798 if (ldebug(renameat))
799 printf(ARGS(renameat, "%s, %s"), from, to);
800 #endif
801 error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE);
802 LFREEPATH(from);
803 LFREEPATH(to);
804 return (error);
805 }
806
807 int
808 linux_symlink(struct thread *td, struct linux_symlink_args *args)
809 {
810 char *path, *to;
811 int error;
812
813 LCONVPATHEXIST(td, args->path, &path);
814 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
815 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
816 if (to == NULL) {
817 LFREEPATH(path);
818 return (error);
819 }
820
821 #ifdef DEBUG
822 if (ldebug(symlink))
823 printf(ARGS(symlink, "%s, %s"), path, to);
824 #endif
825 error = kern_symlink(td, path, to, UIO_SYSSPACE);
826 LFREEPATH(path);
827 LFREEPATH(to);
828 return (error);
829 }
830
831 int
832 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args)
833 {
834 char *path, *to;
835 int error, dfd;
836
837 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
838 LCONVPATHEXIST_AT(td, args->oldname, &path, dfd);
839 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
840 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd);
841 if (to == NULL) {
842 LFREEPATH(path);
843 return (error);
844 }
845
846 #ifdef DEBUG
847 if (ldebug(symlinkat))
848 printf(ARGS(symlinkat, "%s, %s"), path, to);
849 #endif
850
851 error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE);
852 LFREEPATH(path);
853 LFREEPATH(to);
854 return (error);
855 }
856
857 int
858 linux_readlink(struct thread *td, struct linux_readlink_args *args)
859 {
860 char *name;
861 int error;
862
863 LCONVPATHEXIST(td, args->name, &name);
864
865 #ifdef DEBUG
866 if (ldebug(readlink))
867 printf(ARGS(readlink, "%s, %p, %d"), name, (void *)args->buf,
868 args->count);
869 #endif
870 error = kern_readlink(td, name, UIO_SYSSPACE, args->buf, UIO_USERSPACE,
871 args->count);
872 LFREEPATH(name);
873 return (error);
874 }
875
876 int
877 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args)
878 {
879 char *name;
880 int error, dfd;
881
882 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
883 LCONVPATHEXIST_AT(td, args->path, &name, dfd);
884
885 #ifdef DEBUG
886 if (ldebug(readlinkat))
887 printf(ARGS(readlinkat, "%s, %p, %d"), name, (void *)args->buf,
888 args->bufsiz);
889 #endif
890
891 error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf,
892 UIO_USERSPACE, args->bufsiz);
893 LFREEPATH(name);
894 return (error);
895 }
896
897 int
898 linux_truncate(struct thread *td, struct linux_truncate_args *args)
899 {
900 char *path;
901 int error;
902
903 LCONVPATHEXIST(td, args->path, &path);
904
905 #ifdef DEBUG
906 if (ldebug(truncate))
907 printf(ARGS(truncate, "%s, %ld"), path, (long)args->length);
908 #endif
909
910 error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
911 LFREEPATH(path);
912 return (error);
913 }
914
915 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
916 int
917 linux_truncate64(struct thread *td, struct linux_truncate64_args *args)
918 {
919 char *path;
920 int error;
921
922 LCONVPATHEXIST(td, args->path, &path);
923
924 #ifdef DEBUG
925 if (ldebug(truncate64))
926 printf(ARGS(truncate64, "%s, %jd"), path, args->length);
927 #endif
928
929 error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
930 LFREEPATH(path);
931 return (error);
932 }
933 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
934
935 int
936 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args)
937 {
938 struct ftruncate_args /* {
939 int fd;
940 int pad;
941 off_t length;
942 } */ nuap;
943
944 nuap.fd = args->fd;
945 nuap.length = args->length;
946 return (sys_ftruncate(td, &nuap));
947 }
948
949 int
950 linux_link(struct thread *td, struct linux_link_args *args)
951 {
952 char *path, *to;
953 int error;
954
955 LCONVPATHEXIST(td, args->path, &path);
956 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
957 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
958 if (to == NULL) {
959 LFREEPATH(path);
960 return (error);
961 }
962
963 #ifdef DEBUG
964 if (ldebug(link))
965 printf(ARGS(link, "%s, %s"), path, to);
966 #endif
967 error = kern_link(td, path, to, UIO_SYSSPACE);
968 LFREEPATH(path);
969 LFREEPATH(to);
970 return (error);
971 }
972
973 int
974 linux_linkat(struct thread *td, struct linux_linkat_args *args)
975 {
976 char *path, *to;
977 int error, olddfd, newdfd, follow;
978
979 if (args->flag & ~LINUX_AT_SYMLINK_FOLLOW)
980 return (EINVAL);
981
982 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
983 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
984 LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd);
985 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
986 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
987 if (to == NULL) {
988 LFREEPATH(path);
989 return (error);
990 }
991
992 #ifdef DEBUG
993 if (ldebug(linkat))
994 printf(ARGS(linkat, "%i, %s, %i, %s, %i"), args->olddfd, path,
995 args->newdfd, to, args->flag);
996 #endif
997
998 follow = (args->flag & LINUX_AT_SYMLINK_FOLLOW) == 0 ? NOFOLLOW :
999 FOLLOW;
1000 error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, follow);
1001 LFREEPATH(path);
1002 LFREEPATH(to);
1003 return (error);
1004 }
1005
1006 int
1007 linux_fdatasync(td, uap)
1008 struct thread *td;
1009 struct linux_fdatasync_args *uap;
1010 {
1011 struct fsync_args bsd;
1012
1013 bsd.fd = uap->fd;
1014 return (sys_fsync(td, &bsd));
1015 }
1016
1017 int
1018 linux_pread(td, uap)
1019 struct thread *td;
1020 struct linux_pread_args *uap;
1021 {
1022 struct pread_args bsd;
1023 cap_rights_t rights;
1024 struct vnode *vp;
1025 int error;
1026
1027 bsd.fd = uap->fd;
1028 bsd.buf = uap->buf;
1029 bsd.nbyte = uap->nbyte;
1030 bsd.offset = uap->offset;
1031 error = sys_pread(td, &bsd);
1032 if (error == 0) {
1033 /* This seems to violate POSIX but linux does it */
1034 error = fgetvp(td, uap->fd,
1035 cap_rights_init(&rights, CAP_PREAD), &vp);
1036 if (error != 0)
1037 return (error);
1038 if (vp->v_type == VDIR) {
1039 vrele(vp);
1040 return (EISDIR);
1041 }
1042 vrele(vp);
1043 }
1044 return (error);
1045 }
1046
1047 int
1048 linux_pwrite(td, uap)
1049 struct thread *td;
1050 struct linux_pwrite_args *uap;
1051 {
1052 struct pwrite_args bsd;
1053
1054 bsd.fd = uap->fd;
1055 bsd.buf = uap->buf;
1056 bsd.nbyte = uap->nbyte;
1057 bsd.offset = uap->offset;
1058 return (sys_pwrite(td, &bsd));
1059 }
1060
1061 int
1062 linux_mount(struct thread *td, struct linux_mount_args *args)
1063 {
1064 char fstypename[MFSNAMELEN];
1065 char mntonname[MNAMELEN], mntfromname[MNAMELEN];
1066 int error;
1067 int fsflags;
1068
1069 error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1,
1070 NULL);
1071 if (error)
1072 return (error);
1073 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL);
1074 if (error)
1075 return (error);
1076 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL);
1077 if (error)
1078 return (error);
1079
1080 #ifdef DEBUG
1081 if (ldebug(mount))
1082 printf(ARGS(mount, "%s, %s, %s"),
1083 fstypename, mntfromname, mntonname);
1084 #endif
1085
1086 if (strcmp(fstypename, "ext2") == 0) {
1087 strcpy(fstypename, "ext2fs");
1088 } else if (strcmp(fstypename, "proc") == 0) {
1089 strcpy(fstypename, "linprocfs");
1090 } else if (strcmp(fstypename, "vfat") == 0) {
1091 strcpy(fstypename, "msdosfs");
1092 }
1093
1094 fsflags = 0;
1095
1096 if ((args->rwflag & 0xffff0000) == 0xc0ed0000) {
1097 /*
1098 * Linux SYNC flag is not included; the closest equivalent
1099 * FreeBSD has is !ASYNC, which is our default.
1100 */
1101 if (args->rwflag & LINUX_MS_RDONLY)
1102 fsflags |= MNT_RDONLY;
1103 if (args->rwflag & LINUX_MS_NOSUID)
1104 fsflags |= MNT_NOSUID;
1105 if (args->rwflag & LINUX_MS_NOEXEC)
1106 fsflags |= MNT_NOEXEC;
1107 if (args->rwflag & LINUX_MS_REMOUNT)
1108 fsflags |= MNT_UPDATE;
1109 }
1110
1111 error = kernel_vmount(fsflags,
1112 "fstype", fstypename,
1113 "fspath", mntonname,
1114 "from", mntfromname,
1115 NULL);
1116 return (error);
1117 }
1118
1119 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1120 int
1121 linux_oldumount(struct thread *td, struct linux_oldumount_args *args)
1122 {
1123 struct linux_umount_args args2;
1124
1125 args2.path = args->path;
1126 args2.flags = 0;
1127 return (linux_umount(td, &args2));
1128 }
1129 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1130
1131 int
1132 linux_umount(struct thread *td, struct linux_umount_args *args)
1133 {
1134 struct unmount_args bsd;
1135
1136 bsd.path = args->path;
1137 bsd.flags = args->flags; /* XXX correct? */
1138 return (sys_unmount(td, &bsd));
1139 }
1140
1141 /*
1142 * fcntl family of syscalls
1143 */
1144
1145 struct l_flock {
1146 l_short l_type;
1147 l_short l_whence;
1148 l_off_t l_start;
1149 l_off_t l_len;
1150 l_pid_t l_pid;
1151 }
1152 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1153 __packed
1154 #endif
1155 ;
1156
1157 static void
1158 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock)
1159 {
1160 switch (linux_flock->l_type) {
1161 case LINUX_F_RDLCK:
1162 bsd_flock->l_type = F_RDLCK;
1163 break;
1164 case LINUX_F_WRLCK:
1165 bsd_flock->l_type = F_WRLCK;
1166 break;
1167 case LINUX_F_UNLCK:
1168 bsd_flock->l_type = F_UNLCK;
1169 break;
1170 default:
1171 bsd_flock->l_type = -1;
1172 break;
1173 }
1174 bsd_flock->l_whence = linux_flock->l_whence;
1175 bsd_flock->l_start = (off_t)linux_flock->l_start;
1176 bsd_flock->l_len = (off_t)linux_flock->l_len;
1177 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1178 bsd_flock->l_sysid = 0;
1179 }
1180
1181 static void
1182 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock)
1183 {
1184 switch (bsd_flock->l_type) {
1185 case F_RDLCK:
1186 linux_flock->l_type = LINUX_F_RDLCK;
1187 break;
1188 case F_WRLCK:
1189 linux_flock->l_type = LINUX_F_WRLCK;
1190 break;
1191 case F_UNLCK:
1192 linux_flock->l_type = LINUX_F_UNLCK;
1193 break;
1194 }
1195 linux_flock->l_whence = bsd_flock->l_whence;
1196 linux_flock->l_start = (l_off_t)bsd_flock->l_start;
1197 linux_flock->l_len = (l_off_t)bsd_flock->l_len;
1198 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1199 }
1200
1201 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1202 struct l_flock64 {
1203 l_short l_type;
1204 l_short l_whence;
1205 l_loff_t l_start;
1206 l_loff_t l_len;
1207 l_pid_t l_pid;
1208 }
1209 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1210 __packed
1211 #endif
1212 ;
1213
1214 static void
1215 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock)
1216 {
1217 switch (linux_flock->l_type) {
1218 case LINUX_F_RDLCK:
1219 bsd_flock->l_type = F_RDLCK;
1220 break;
1221 case LINUX_F_WRLCK:
1222 bsd_flock->l_type = F_WRLCK;
1223 break;
1224 case LINUX_F_UNLCK:
1225 bsd_flock->l_type = F_UNLCK;
1226 break;
1227 default:
1228 bsd_flock->l_type = -1;
1229 break;
1230 }
1231 bsd_flock->l_whence = linux_flock->l_whence;
1232 bsd_flock->l_start = (off_t)linux_flock->l_start;
1233 bsd_flock->l_len = (off_t)linux_flock->l_len;
1234 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1235 bsd_flock->l_sysid = 0;
1236 }
1237
1238 static void
1239 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock)
1240 {
1241 switch (bsd_flock->l_type) {
1242 case F_RDLCK:
1243 linux_flock->l_type = LINUX_F_RDLCK;
1244 break;
1245 case F_WRLCK:
1246 linux_flock->l_type = LINUX_F_WRLCK;
1247 break;
1248 case F_UNLCK:
1249 linux_flock->l_type = LINUX_F_UNLCK;
1250 break;
1251 }
1252 linux_flock->l_whence = bsd_flock->l_whence;
1253 linux_flock->l_start = (l_loff_t)bsd_flock->l_start;
1254 linux_flock->l_len = (l_loff_t)bsd_flock->l_len;
1255 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1256 }
1257 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1258
1259 static int
1260 fcntl_common(struct thread *td, struct linux_fcntl_args *args)
1261 {
1262 struct l_flock linux_flock;
1263 struct flock bsd_flock;
1264 cap_rights_t rights;
1265 struct file *fp;
1266 long arg;
1267 int error, result;
1268
1269 switch (args->cmd) {
1270 case LINUX_F_DUPFD:
1271 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg));
1272
1273 case LINUX_F_GETFD:
1274 return (kern_fcntl(td, args->fd, F_GETFD, 0));
1275
1276 case LINUX_F_SETFD:
1277 return (kern_fcntl(td, args->fd, F_SETFD, args->arg));
1278
1279 case LINUX_F_GETFL:
1280 error = kern_fcntl(td, args->fd, F_GETFL, 0);
1281 result = td->td_retval[0];
1282 td->td_retval[0] = 0;
1283 if (result & O_RDONLY)
1284 td->td_retval[0] |= LINUX_O_RDONLY;
1285 if (result & O_WRONLY)
1286 td->td_retval[0] |= LINUX_O_WRONLY;
1287 if (result & O_RDWR)
1288 td->td_retval[0] |= LINUX_O_RDWR;
1289 if (result & O_NDELAY)
1290 td->td_retval[0] |= LINUX_O_NONBLOCK;
1291 if (result & O_APPEND)
1292 td->td_retval[0] |= LINUX_O_APPEND;
1293 if (result & O_FSYNC)
1294 td->td_retval[0] |= LINUX_O_SYNC;
1295 if (result & O_ASYNC)
1296 td->td_retval[0] |= LINUX_FASYNC;
1297 #ifdef LINUX_O_NOFOLLOW
1298 if (result & O_NOFOLLOW)
1299 td->td_retval[0] |= LINUX_O_NOFOLLOW;
1300 #endif
1301 #ifdef LINUX_O_DIRECT
1302 if (result & O_DIRECT)
1303 td->td_retval[0] |= LINUX_O_DIRECT;
1304 #endif
1305 return (error);
1306
1307 case LINUX_F_SETFL:
1308 arg = 0;
1309 if (args->arg & LINUX_O_NDELAY)
1310 arg |= O_NONBLOCK;
1311 if (args->arg & LINUX_O_APPEND)
1312 arg |= O_APPEND;
1313 if (args->arg & LINUX_O_SYNC)
1314 arg |= O_FSYNC;
1315 if (args->arg & LINUX_FASYNC)
1316 arg |= O_ASYNC;
1317 #ifdef LINUX_O_NOFOLLOW
1318 if (args->arg & LINUX_O_NOFOLLOW)
1319 arg |= O_NOFOLLOW;
1320 #endif
1321 #ifdef LINUX_O_DIRECT
1322 if (args->arg & LINUX_O_DIRECT)
1323 arg |= O_DIRECT;
1324 #endif
1325 return (kern_fcntl(td, args->fd, F_SETFL, arg));
1326
1327 case LINUX_F_GETLK:
1328 error = copyin((void *)args->arg, &linux_flock,
1329 sizeof(linux_flock));
1330 if (error)
1331 return (error);
1332 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1333 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1334 if (error)
1335 return (error);
1336 bsd_to_linux_flock(&bsd_flock, &linux_flock);
1337 return (copyout(&linux_flock, (void *)args->arg,
1338 sizeof(linux_flock)));
1339
1340 case LINUX_F_SETLK:
1341 error = copyin((void *)args->arg, &linux_flock,
1342 sizeof(linux_flock));
1343 if (error)
1344 return (error);
1345 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1346 return (kern_fcntl(td, args->fd, F_SETLK,
1347 (intptr_t)&bsd_flock));
1348
1349 case LINUX_F_SETLKW:
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_SETLKW,
1356 (intptr_t)&bsd_flock));
1357
1358 case LINUX_F_GETOWN:
1359 return (kern_fcntl(td, args->fd, F_GETOWN, 0));
1360
1361 case LINUX_F_SETOWN:
1362 /*
1363 * XXX some Linux applications depend on F_SETOWN having no
1364 * significant effect for pipes (SIGIO is not delivered for
1365 * pipes under Linux-2.2.35 at least).
1366 */
1367 error = fget(td, args->fd,
1368 cap_rights_init(&rights, CAP_FCNTL), &fp);
1369 if (error)
1370 return (error);
1371 if (fp->f_type == DTYPE_PIPE) {
1372 fdrop(fp, td);
1373 return (EINVAL);
1374 }
1375 fdrop(fp, td);
1376
1377 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg));
1378
1379 case LINUX_F_DUPFD_CLOEXEC:
1380 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg));
1381 }
1382
1383 return (EINVAL);
1384 }
1385
1386 int
1387 linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
1388 {
1389
1390 #ifdef DEBUG
1391 if (ldebug(fcntl))
1392 printf(ARGS(fcntl, "%d, %08x, *"), args->fd, args->cmd);
1393 #endif
1394
1395 return (fcntl_common(td, args));
1396 }
1397
1398 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1399 int
1400 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args)
1401 {
1402 struct l_flock64 linux_flock;
1403 struct flock bsd_flock;
1404 struct linux_fcntl_args fcntl_args;
1405 int error;
1406
1407 #ifdef DEBUG
1408 if (ldebug(fcntl64))
1409 printf(ARGS(fcntl64, "%d, %08x, *"), args->fd, args->cmd);
1410 #endif
1411
1412 switch (args->cmd) {
1413 case LINUX_F_GETLK64:
1414 error = copyin((void *)args->arg, &linux_flock,
1415 sizeof(linux_flock));
1416 if (error)
1417 return (error);
1418 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1419 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1420 if (error)
1421 return (error);
1422 bsd_to_linux_flock64(&bsd_flock, &linux_flock);
1423 return (copyout(&linux_flock, (void *)args->arg,
1424 sizeof(linux_flock)));
1425
1426 case LINUX_F_SETLK64:
1427 error = copyin((void *)args->arg, &linux_flock,
1428 sizeof(linux_flock));
1429 if (error)
1430 return (error);
1431 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1432 return (kern_fcntl(td, args->fd, F_SETLK,
1433 (intptr_t)&bsd_flock));
1434
1435 case LINUX_F_SETLKW64:
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_SETLKW,
1442 (intptr_t)&bsd_flock));
1443 }
1444
1445 fcntl_args.fd = args->fd;
1446 fcntl_args.cmd = args->cmd;
1447 fcntl_args.arg = args->arg;
1448 return (fcntl_common(td, &fcntl_args));
1449 }
1450 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1451
1452 int
1453 linux_chown(struct thread *td, struct linux_chown_args *args)
1454 {
1455 char *path;
1456 int error;
1457
1458 LCONVPATHEXIST(td, args->path, &path);
1459
1460 #ifdef DEBUG
1461 if (ldebug(chown))
1462 printf(ARGS(chown, "%s, %d, %d"), path, args->uid, args->gid);
1463 #endif
1464 error = kern_chown(td, path, UIO_SYSSPACE, args->uid, args->gid);
1465 LFREEPATH(path);
1466 return (error);
1467 }
1468
1469 int
1470 linux_fchownat(struct thread *td, struct linux_fchownat_args *args)
1471 {
1472 char *path;
1473 int error, dfd, flag;
1474
1475 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
1476 return (EINVAL);
1477
1478 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
1479 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
1480
1481 #ifdef DEBUG
1482 if (ldebug(fchownat))
1483 printf(ARGS(fchownat, "%s, %d, %d"), path, args->uid, args->gid);
1484 #endif
1485
1486 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 :
1487 AT_SYMLINK_NOFOLLOW;
1488 error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid,
1489 flag);
1490 LFREEPATH(path);
1491 return (error);
1492 }
1493
1494 int
1495 linux_lchown(struct thread *td, struct linux_lchown_args *args)
1496 {
1497 char *path;
1498 int error;
1499
1500 LCONVPATHEXIST(td, args->path, &path);
1501
1502 #ifdef DEBUG
1503 if (ldebug(lchown))
1504 printf(ARGS(lchown, "%s, %d, %d"), path, args->uid, args->gid);
1505 #endif
1506 error = kern_lchown(td, path, UIO_SYSSPACE, args->uid, args->gid);
1507 LFREEPATH(path);
1508 return (error);
1509 }
1510
1511 static int
1512 convert_fadvice(int advice)
1513 {
1514 switch (advice) {
1515 case LINUX_POSIX_FADV_NORMAL:
1516 return (POSIX_FADV_NORMAL);
1517 case LINUX_POSIX_FADV_RANDOM:
1518 return (POSIX_FADV_RANDOM);
1519 case LINUX_POSIX_FADV_SEQUENTIAL:
1520 return (POSIX_FADV_SEQUENTIAL);
1521 case LINUX_POSIX_FADV_WILLNEED:
1522 return (POSIX_FADV_WILLNEED);
1523 case LINUX_POSIX_FADV_DONTNEED:
1524 return (POSIX_FADV_DONTNEED);
1525 case LINUX_POSIX_FADV_NOREUSE:
1526 return (POSIX_FADV_NOREUSE);
1527 default:
1528 return (-1);
1529 }
1530 }
1531
1532 int
1533 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args)
1534 {
1535 int advice;
1536
1537 advice = convert_fadvice(args->advice);
1538 if (advice == -1)
1539 return (EINVAL);
1540 return (kern_posix_fadvise(td, args->fd, args->offset, args->len,
1541 advice));
1542 }
1543
1544 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1545 int
1546 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args)
1547 {
1548 int advice;
1549
1550 advice = convert_fadvice(args->advice);
1551 if (advice == -1)
1552 return (EINVAL);
1553 return (kern_posix_fadvise(td, args->fd, args->offset, args->len,
1554 advice));
1555 }
1556 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1557
1558 int
1559 linux_pipe(struct thread *td, struct linux_pipe_args *args)
1560 {
1561 int fildes[2];
1562 int error;
1563
1564 #ifdef DEBUG
1565 if (ldebug(pipe))
1566 printf(ARGS(pipe, "*"));
1567 #endif
1568
1569 error = kern_pipe2(td, fildes, 0);
1570 if (error)
1571 return (error);
1572
1573 /* XXX: Close descriptors on error. */
1574 return (copyout(fildes, args->pipefds, sizeof(fildes)));
1575 }
1576
1577 int
1578 linux_pipe2(struct thread *td, struct linux_pipe2_args *args)
1579 {
1580 int fildes[2];
1581 int error, flags;
1582
1583 #ifdef DEBUG
1584 if (ldebug(pipe2))
1585 printf(ARGS(pipe2, "*, %d"), args->flags);
1586 #endif
1587
1588 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0)
1589 return (EINVAL);
1590
1591 flags = 0;
1592 if ((args->flags & LINUX_O_NONBLOCK) != 0)
1593 flags |= O_NONBLOCK;
1594 if ((args->flags & LINUX_O_CLOEXEC) != 0)
1595 flags |= O_CLOEXEC;
1596 error = kern_pipe2(td, fildes, flags);
1597 if (error)
1598 return (error);
1599
1600 /* XXX: Close descriptors on error. */
1601 return (copyout(fildes, args->pipefds, sizeof(fildes)));
1602 }
1603
1604 int
1605 linux_dup3(struct thread *td, struct linux_dup3_args *args)
1606 {
1607 int cmd;
1608 intptr_t newfd;
1609
1610 if (args->oldfd == args->newfd)
1611 return (EINVAL);
1612 if ((args->flags & ~LINUX_O_CLOEXEC) != 0)
1613 return (EINVAL);
1614 if (args->flags & LINUX_O_CLOEXEC)
1615 cmd = F_DUP2FD_CLOEXEC;
1616 else
1617 cmd = F_DUP2FD;
1618
1619 newfd = args->newfd;
1620 return (kern_fcntl(td, args->oldfd, cmd, newfd));
1621 }
1622
1623 int
1624 linux_fallocate(struct thread *td, struct linux_fallocate_args *args)
1625 {
1626
1627 /*
1628 * We emulate only posix_fallocate system call for which
1629 * mode should be 0.
1630 */
1631 if (args->mode != 0)
1632 return (ENOSYS);
1633
1634 return (kern_posix_fallocate(td, args->fd, args->offset,
1635 args->len));
1636 }
Cache object: db03d72e0252a368c871bb253e98cb8e
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