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/10.1/sys/compat/linux/linux_file.c 255219 2013-09-05 00:09:56Z pjd $");
31
32 #include "opt_compat.h"
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/capability.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 #include <ufs/ufs/extattr.h>
59 #include <ufs/ufs/quota.h>
60 #include <ufs/ufs/ufsmount.h>
61
62 #ifdef COMPAT_LINUX32
63 #include <machine/../linux32/linux.h>
64 #include <machine/../linux32/linux32_proto.h>
65 #else
66 #include <machine/../linux/linux.h>
67 #include <machine/../linux/linux_proto.h>
68 #endif
69 #include <compat/linux/linux_misc.h>
70 #include <compat/linux/linux_util.h>
71 #include <compat/linux/linux_file.h>
72
73 int
74 linux_creat(struct thread *td, struct linux_creat_args *args)
75 {
76 char *path;
77 int error;
78
79 LCONVPATHEXIST(td, args->path, &path);
80
81 #ifdef DEBUG
82 if (ldebug(creat))
83 printf(ARGS(creat, "%s, %d"), path, args->mode);
84 #endif
85 error = kern_open(td, path, UIO_SYSSPACE, O_WRONLY | O_CREAT | O_TRUNC,
86 args->mode);
87 LFREEPATH(path);
88 return (error);
89 }
90
91
92 static int
93 linux_common_open(struct thread *td, int dirfd, char *path, int l_flags, int mode)
94 {
95 cap_rights_t rights;
96 struct proc *p = td->td_proc;
97 struct file *fp;
98 int fd;
99 int bsd_flags, error;
100
101 bsd_flags = 0;
102 switch (l_flags & LINUX_O_ACCMODE) {
103 case LINUX_O_WRONLY:
104 bsd_flags |= O_WRONLY;
105 break;
106 case LINUX_O_RDWR:
107 bsd_flags |= O_RDWR;
108 break;
109 default:
110 bsd_flags |= O_RDONLY;
111 }
112 if (l_flags & LINUX_O_NDELAY)
113 bsd_flags |= O_NONBLOCK;
114 if (l_flags & LINUX_O_APPEND)
115 bsd_flags |= O_APPEND;
116 if (l_flags & LINUX_O_SYNC)
117 bsd_flags |= O_FSYNC;
118 if (l_flags & LINUX_O_NONBLOCK)
119 bsd_flags |= O_NONBLOCK;
120 if (l_flags & LINUX_FASYNC)
121 bsd_flags |= O_ASYNC;
122 if (l_flags & LINUX_O_CREAT)
123 bsd_flags |= O_CREAT;
124 if (l_flags & LINUX_O_TRUNC)
125 bsd_flags |= O_TRUNC;
126 if (l_flags & LINUX_O_EXCL)
127 bsd_flags |= O_EXCL;
128 if (l_flags & LINUX_O_NOCTTY)
129 bsd_flags |= O_NOCTTY;
130 if (l_flags & LINUX_O_DIRECT)
131 bsd_flags |= O_DIRECT;
132 if (l_flags & LINUX_O_NOFOLLOW)
133 bsd_flags |= O_NOFOLLOW;
134 if (l_flags & LINUX_O_DIRECTORY)
135 bsd_flags |= O_DIRECTORY;
136 /* XXX LINUX_O_NOATIME: unable to be easily implemented. */
137
138 error = kern_openat(td, dirfd, path, UIO_SYSSPACE, bsd_flags, mode);
139
140 if (!error) {
141 fd = td->td_retval[0];
142 /*
143 * XXX In between kern_open() and fget(), another process
144 * having the same filedesc could use that fd without
145 * checking below.
146 */
147 error = fget(td, fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
148 if (!error) {
149 sx_slock(&proctree_lock);
150 PROC_LOCK(p);
151 if (!(bsd_flags & O_NOCTTY) &&
152 SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
153 PROC_UNLOCK(p);
154 sx_unlock(&proctree_lock);
155 /* XXXPJD: Verify if TIOCSCTTY is allowed. */
156 if (fp->f_type == DTYPE_VNODE)
157 (void) fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0,
158 td->td_ucred, td);
159 } else {
160 PROC_UNLOCK(p);
161 sx_sunlock(&proctree_lock);
162 }
163 fdrop(fp, td);
164 /*
165 * XXX as above, fdrop()/kern_close() pair is racy.
166 */
167 if (error)
168 kern_close(td, fd);
169 }
170 }
171
172 #ifdef DEBUG
173 if (ldebug(open))
174 printf(LMSG("open returns error %d"), error);
175 #endif
176 LFREEPATH(path);
177 return (error);
178 }
179
180 int
181 linux_openat(struct thread *td, struct linux_openat_args *args)
182 {
183 char *path;
184 int dfd;
185
186 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
187 if (args->flags & LINUX_O_CREAT)
188 LCONVPATH_AT(td, args->filename, &path, 1, dfd);
189 else
190 LCONVPATH_AT(td, args->filename, &path, 0, dfd);
191 #ifdef DEBUG
192 if (ldebug(openat))
193 printf(ARGS(openat, "%i, %s, 0x%x, 0x%x"), args->dfd,
194 path, args->flags, args->mode);
195 #endif
196 return (linux_common_open(td, dfd, path, args->flags, args->mode));
197 }
198
199 int
200 linux_open(struct thread *td, struct linux_open_args *args)
201 {
202 char *path;
203
204 if (args->flags & LINUX_O_CREAT)
205 LCONVPATHCREAT(td, args->path, &path);
206 else
207 LCONVPATHEXIST(td, args->path, &path);
208
209 #ifdef DEBUG
210 if (ldebug(open))
211 printf(ARGS(open, "%s, 0x%x, 0x%x"),
212 path, args->flags, args->mode);
213 #endif
214
215 return (linux_common_open(td, AT_FDCWD, path, args->flags, args->mode));
216 }
217
218 int
219 linux_lseek(struct thread *td, struct linux_lseek_args *args)
220 {
221
222 struct lseek_args /* {
223 int fd;
224 int pad;
225 off_t offset;
226 int whence;
227 } */ tmp_args;
228 int error;
229
230 #ifdef DEBUG
231 if (ldebug(lseek))
232 printf(ARGS(lseek, "%d, %ld, %d"),
233 args->fdes, (long)args->off, args->whence);
234 #endif
235 tmp_args.fd = args->fdes;
236 tmp_args.offset = (off_t)args->off;
237 tmp_args.whence = args->whence;
238 error = sys_lseek(td, &tmp_args);
239 return error;
240 }
241
242 int
243 linux_llseek(struct thread *td, struct linux_llseek_args *args)
244 {
245 struct lseek_args bsd_args;
246 int error;
247 off_t off;
248
249 #ifdef DEBUG
250 if (ldebug(llseek))
251 printf(ARGS(llseek, "%d, %d:%d, %d"),
252 args->fd, args->ohigh, args->olow, args->whence);
253 #endif
254 off = (args->olow) | (((off_t) args->ohigh) << 32);
255
256 bsd_args.fd = args->fd;
257 bsd_args.offset = off;
258 bsd_args.whence = args->whence;
259
260 if ((error = sys_lseek(td, &bsd_args)))
261 return error;
262
263 if ((error = copyout(td->td_retval, args->res, sizeof (off_t))))
264 return error;
265
266 td->td_retval[0] = 0;
267 return 0;
268 }
269
270 int
271 linux_readdir(struct thread *td, struct linux_readdir_args *args)
272 {
273 struct linux_getdents_args lda;
274
275 lda.fd = args->fd;
276 lda.dent = args->dent;
277 lda.count = 1;
278 return linux_getdents(td, &lda);
279 }
280
281 /*
282 * Note that linux_getdents(2) and linux_getdents64(2) have the same
283 * arguments. They only differ in the definition of struct dirent they
284 * operate on. We use this to common the code, with the exception of
285 * accessing struct dirent. Note that linux_readdir(2) is implemented
286 * by means of linux_getdents(2). In this case we never operate on
287 * struct dirent64 and thus don't need to handle it...
288 */
289
290 struct l_dirent {
291 l_ulong d_ino;
292 l_off_t d_off;
293 l_ushort d_reclen;
294 char d_name[LINUX_NAME_MAX + 1];
295 };
296
297 struct l_dirent64 {
298 uint64_t d_ino;
299 int64_t d_off;
300 l_ushort d_reclen;
301 u_char d_type;
302 char d_name[LINUX_NAME_MAX + 1];
303 };
304
305 /*
306 * Linux uses the last byte in the dirent buffer to store d_type,
307 * at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes.
308 */
309 #define LINUX_RECLEN(namlen) \
310 roundup((offsetof(struct l_dirent, d_name) + (namlen) + 2), \
311 sizeof(l_ulong))
312
313 #define LINUX_RECLEN64(namlen) \
314 roundup((offsetof(struct l_dirent64, d_name) + (namlen) + 1), \
315 sizeof(uint64_t))
316
317 #define LINUX_MAXRECLEN max(LINUX_RECLEN(LINUX_NAME_MAX), \
318 LINUX_RECLEN64(LINUX_NAME_MAX))
319 #define LINUX_DIRBLKSIZ 512
320
321 static int
322 getdents_common(struct thread *td, struct linux_getdents64_args *args,
323 int is64bit)
324 {
325 struct dirent *bdp;
326 struct vnode *vp;
327 caddr_t inp, buf; /* BSD-format */
328 int len, reclen; /* BSD-format */
329 caddr_t outp; /* Linux-format */
330 int resid, linuxreclen=0; /* Linux-format */
331 caddr_t lbuf; /* Linux-format */
332 cap_rights_t rights;
333 struct file *fp;
334 struct uio auio;
335 struct iovec aiov;
336 off_t off;
337 struct l_dirent *linux_dirent;
338 struct l_dirent64 *linux_dirent64;
339 int buflen, error, eofflag, nbytes, justone;
340 u_long *cookies = NULL, *cookiep;
341 int ncookies;
342
343 nbytes = args->count;
344 if (nbytes == 1) {
345 /* readdir(2) case. Always struct dirent. */
346 if (is64bit)
347 return (EINVAL);
348 nbytes = sizeof(*linux_dirent);
349 justone = 1;
350 } else
351 justone = 0;
352
353 error = getvnode(td->td_proc->p_fd, args->fd,
354 cap_rights_init(&rights, CAP_READ), &fp);
355 if (error != 0)
356 return (error);
357
358 if ((fp->f_flag & FREAD) == 0) {
359 fdrop(fp, td);
360 return (EBADF);
361 }
362
363 off = foffset_lock(fp, 0);
364 vp = fp->f_vnode;
365 if (vp->v_type != VDIR) {
366 foffset_unlock(fp, off, 0);
367 fdrop(fp, td);
368 return (EINVAL);
369 }
370
371
372 buflen = max(LINUX_DIRBLKSIZ, nbytes);
373 buflen = min(buflen, MAXBSIZE);
374 buf = malloc(buflen, M_TEMP, M_WAITOK);
375 lbuf = malloc(LINUX_MAXRECLEN, M_TEMP, M_WAITOK | M_ZERO);
376 vn_lock(vp, LK_SHARED | LK_RETRY);
377
378 aiov.iov_base = buf;
379 aiov.iov_len = buflen;
380 auio.uio_iov = &aiov;
381 auio.uio_iovcnt = 1;
382 auio.uio_rw = UIO_READ;
383 auio.uio_segflg = UIO_SYSSPACE;
384 auio.uio_td = td;
385 auio.uio_resid = buflen;
386 auio.uio_offset = off;
387
388 #ifdef MAC
389 /*
390 * Do directory search MAC check using non-cached credentials.
391 */
392 if ((error = mac_vnode_check_readdir(td->td_ucred, vp)))
393 goto out;
394 #endif /* MAC */
395 if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies,
396 &cookies)))
397 goto out;
398
399 inp = buf;
400 outp = (caddr_t)args->dirent;
401 resid = nbytes;
402 if ((len = buflen - auio.uio_resid) <= 0)
403 goto eof;
404
405 cookiep = cookies;
406
407 if (cookies) {
408 /*
409 * When using cookies, the vfs has the option of reading from
410 * a different offset than that supplied (UFS truncates the
411 * offset to a block boundary to make sure that it never reads
412 * partway through a directory entry, even if the directory
413 * has been compacted).
414 */
415 while (len > 0 && ncookies > 0 && *cookiep <= off) {
416 bdp = (struct dirent *) inp;
417 len -= bdp->d_reclen;
418 inp += bdp->d_reclen;
419 cookiep++;
420 ncookies--;
421 }
422 }
423
424 while (len > 0) {
425 if (cookiep && ncookies == 0)
426 break;
427 bdp = (struct dirent *) inp;
428 reclen = bdp->d_reclen;
429 if (reclen & 3) {
430 error = EFAULT;
431 goto out;
432 }
433
434 if (bdp->d_fileno == 0) {
435 inp += reclen;
436 if (cookiep) {
437 off = *cookiep++;
438 ncookies--;
439 } else
440 off += reclen;
441
442 len -= reclen;
443 continue;
444 }
445
446 linuxreclen = (is64bit)
447 ? LINUX_RECLEN64(bdp->d_namlen)
448 : LINUX_RECLEN(bdp->d_namlen);
449
450 if (reclen > len || resid < linuxreclen) {
451 outp++;
452 break;
453 }
454
455 if (justone) {
456 /* readdir(2) case. */
457 linux_dirent = (struct l_dirent*)lbuf;
458 linux_dirent->d_ino = bdp->d_fileno;
459 linux_dirent->d_off = (l_off_t)linuxreclen;
460 linux_dirent->d_reclen = (l_ushort)bdp->d_namlen;
461 strlcpy(linux_dirent->d_name, bdp->d_name,
462 linuxreclen - offsetof(struct l_dirent, d_name));
463 error = copyout(linux_dirent, outp, linuxreclen);
464 }
465 if (is64bit) {
466 linux_dirent64 = (struct l_dirent64*)lbuf;
467 linux_dirent64->d_ino = bdp->d_fileno;
468 linux_dirent64->d_off = (cookiep)
469 ? (l_off_t)*cookiep
470 : (l_off_t)(off + reclen);
471 linux_dirent64->d_reclen = (l_ushort)linuxreclen;
472 linux_dirent64->d_type = bdp->d_type;
473 strlcpy(linux_dirent64->d_name, bdp->d_name,
474 linuxreclen - offsetof(struct l_dirent64, d_name));
475 error = copyout(linux_dirent64, outp, linuxreclen);
476 } else if (!justone) {
477 linux_dirent = (struct l_dirent*)lbuf;
478 linux_dirent->d_ino = bdp->d_fileno;
479 linux_dirent->d_off = (cookiep)
480 ? (l_off_t)*cookiep
481 : (l_off_t)(off + reclen);
482 linux_dirent->d_reclen = (l_ushort)linuxreclen;
483 /*
484 * Copy d_type to last byte of l_dirent buffer
485 */
486 lbuf[linuxreclen-1] = bdp->d_type;
487 strlcpy(linux_dirent->d_name, bdp->d_name,
488 linuxreclen - offsetof(struct l_dirent, d_name)-1);
489 error = copyout(linux_dirent, outp, linuxreclen);
490 }
491
492 if (error)
493 goto out;
494
495 inp += reclen;
496 if (cookiep) {
497 off = *cookiep++;
498 ncookies--;
499 } else
500 off += reclen;
501
502 outp += linuxreclen;
503 resid -= linuxreclen;
504 len -= reclen;
505 if (justone)
506 break;
507 }
508
509 if (outp == (caddr_t)args->dirent) {
510 nbytes = resid;
511 goto eof;
512 }
513
514 if (justone)
515 nbytes = resid + linuxreclen;
516
517 eof:
518 td->td_retval[0] = nbytes - resid;
519
520 out:
521 free(cookies, M_TEMP);
522
523 VOP_UNLOCK(vp, 0);
524 foffset_unlock(fp, off, 0);
525 fdrop(fp, td);
526 free(buf, M_TEMP);
527 free(lbuf, M_TEMP);
528 return (error);
529 }
530
531 int
532 linux_getdents(struct thread *td, struct linux_getdents_args *args)
533 {
534
535 #ifdef DEBUG
536 if (ldebug(getdents))
537 printf(ARGS(getdents, "%d, *, %d"), args->fd, args->count);
538 #endif
539
540 return (getdents_common(td, (struct linux_getdents64_args*)args, 0));
541 }
542
543 int
544 linux_getdents64(struct thread *td, struct linux_getdents64_args *args)
545 {
546
547 #ifdef DEBUG
548 if (ldebug(getdents64))
549 printf(ARGS(getdents64, "%d, *, %d"), args->fd, args->count);
550 #endif
551
552 return (getdents_common(td, args, 1));
553 }
554
555 /*
556 * These exist mainly for hooks for doing /compat/linux translation.
557 */
558
559 int
560 linux_access(struct thread *td, struct linux_access_args *args)
561 {
562 char *path;
563 int error;
564
565 /* linux convention */
566 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
567 return (EINVAL);
568
569 LCONVPATHEXIST(td, args->path, &path);
570
571 #ifdef DEBUG
572 if (ldebug(access))
573 printf(ARGS(access, "%s, %d"), path, args->amode);
574 #endif
575 error = kern_access(td, path, UIO_SYSSPACE, args->amode);
576 LFREEPATH(path);
577
578 return (error);
579 }
580
581 int
582 linux_faccessat(struct thread *td, struct linux_faccessat_args *args)
583 {
584 char *path;
585 int error, dfd, flag;
586
587 if (args->flag & ~LINUX_AT_EACCESS)
588 return (EINVAL);
589 /* linux convention */
590 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
591 return (EINVAL);
592
593 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
594 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
595
596 #ifdef DEBUG
597 if (ldebug(access))
598 printf(ARGS(access, "%s, %d"), path, args->amode);
599 #endif
600
601 flag = (args->flag & LINUX_AT_EACCESS) == 0 ? 0 : AT_EACCESS;
602 error = kern_accessat(td, dfd, path, UIO_SYSSPACE, flag, args->amode);
603 LFREEPATH(path);
604
605 return (error);
606 }
607
608 int
609 linux_unlink(struct thread *td, struct linux_unlink_args *args)
610 {
611 char *path;
612 int error;
613 struct stat st;
614
615 LCONVPATHEXIST(td, args->path, &path);
616
617 #ifdef DEBUG
618 if (ldebug(unlink))
619 printf(ARGS(unlink, "%s"), path);
620 #endif
621
622 error = kern_unlink(td, path, UIO_SYSSPACE);
623 if (error == EPERM)
624 /* Introduce POSIX noncompliant behaviour of Linux */
625 if (kern_stat(td, path, UIO_SYSSPACE, &st) == 0)
626 if (S_ISDIR(st.st_mode))
627 error = EISDIR;
628 LFREEPATH(path);
629 return (error);
630 }
631
632 int
633 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args)
634 {
635 char *path;
636 int error, dfd;
637 struct stat st;
638
639 if (args->flag & ~LINUX_AT_REMOVEDIR)
640 return (EINVAL);
641
642 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
643 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
644
645 #ifdef DEBUG
646 if (ldebug(unlinkat))
647 printf(ARGS(unlinkat, "%s"), path);
648 #endif
649
650 if (args->flag & LINUX_AT_REMOVEDIR)
651 error = kern_rmdirat(td, dfd, path, UIO_SYSSPACE);
652 else
653 error = kern_unlinkat(td, dfd, path, UIO_SYSSPACE, 0);
654 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) {
655 /* Introduce POSIX noncompliant behaviour of Linux */
656 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path,
657 UIO_SYSSPACE, &st) == 0 && S_ISDIR(st.st_mode))
658 error = EISDIR;
659 }
660 LFREEPATH(path);
661 return (error);
662 }
663 int
664 linux_chdir(struct thread *td, struct linux_chdir_args *args)
665 {
666 char *path;
667 int error;
668
669 LCONVPATHEXIST(td, args->path, &path);
670
671 #ifdef DEBUG
672 if (ldebug(chdir))
673 printf(ARGS(chdir, "%s"), path);
674 #endif
675 error = kern_chdir(td, path, UIO_SYSSPACE);
676 LFREEPATH(path);
677 return (error);
678 }
679
680 int
681 linux_chmod(struct thread *td, struct linux_chmod_args *args)
682 {
683 char *path;
684 int error;
685
686 LCONVPATHEXIST(td, args->path, &path);
687
688 #ifdef DEBUG
689 if (ldebug(chmod))
690 printf(ARGS(chmod, "%s, %d"), path, args->mode);
691 #endif
692 error = kern_chmod(td, path, UIO_SYSSPACE, args->mode);
693 LFREEPATH(path);
694 return (error);
695 }
696
697 int
698 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args)
699 {
700 char *path;
701 int error, dfd;
702
703 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
704 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
705
706 #ifdef DEBUG
707 if (ldebug(fchmodat))
708 printf(ARGS(fchmodat, "%s, %d"), path, args->mode);
709 #endif
710
711 error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0);
712 LFREEPATH(path);
713 return (error);
714 }
715
716 int
717 linux_mkdir(struct thread *td, struct linux_mkdir_args *args)
718 {
719 char *path;
720 int error;
721
722 LCONVPATHCREAT(td, args->path, &path);
723
724 #ifdef DEBUG
725 if (ldebug(mkdir))
726 printf(ARGS(mkdir, "%s, %d"), path, args->mode);
727 #endif
728 error = kern_mkdir(td, path, UIO_SYSSPACE, args->mode);
729 LFREEPATH(path);
730 return (error);
731 }
732
733 int
734 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args)
735 {
736 char *path;
737 int error, dfd;
738
739 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
740 LCONVPATHCREAT_AT(td, args->pathname, &path, dfd);
741
742 #ifdef DEBUG
743 if (ldebug(mkdirat))
744 printf(ARGS(mkdirat, "%s, %d"), path, args->mode);
745 #endif
746 error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode);
747 LFREEPATH(path);
748 return (error);
749 }
750
751 int
752 linux_rmdir(struct thread *td, struct linux_rmdir_args *args)
753 {
754 char *path;
755 int error;
756
757 LCONVPATHEXIST(td, args->path, &path);
758
759 #ifdef DEBUG
760 if (ldebug(rmdir))
761 printf(ARGS(rmdir, "%s"), path);
762 #endif
763 error = kern_rmdir(td, path, UIO_SYSSPACE);
764 LFREEPATH(path);
765 return (error);
766 }
767
768 int
769 linux_rename(struct thread *td, struct linux_rename_args *args)
770 {
771 char *from, *to;
772 int error;
773
774 LCONVPATHEXIST(td, args->from, &from);
775 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
776 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
777 if (to == NULL) {
778 LFREEPATH(from);
779 return (error);
780 }
781
782 #ifdef DEBUG
783 if (ldebug(rename))
784 printf(ARGS(rename, "%s, %s"), from, to);
785 #endif
786 error = kern_rename(td, from, to, UIO_SYSSPACE);
787 LFREEPATH(from);
788 LFREEPATH(to);
789 return (error);
790 }
791
792 int
793 linux_renameat(struct thread *td, struct linux_renameat_args *args)
794 {
795 char *from, *to;
796 int error, olddfd, newdfd;
797
798 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
799 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
800 LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd);
801 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
802 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
803 if (to == NULL) {
804 LFREEPATH(from);
805 return (error);
806 }
807
808 #ifdef DEBUG
809 if (ldebug(renameat))
810 printf(ARGS(renameat, "%s, %s"), from, to);
811 #endif
812 error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE);
813 LFREEPATH(from);
814 LFREEPATH(to);
815 return (error);
816 }
817
818 int
819 linux_symlink(struct thread *td, struct linux_symlink_args *args)
820 {
821 char *path, *to;
822 int error;
823
824 LCONVPATHEXIST(td, args->path, &path);
825 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
826 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
827 if (to == NULL) {
828 LFREEPATH(path);
829 return (error);
830 }
831
832 #ifdef DEBUG
833 if (ldebug(symlink))
834 printf(ARGS(symlink, "%s, %s"), path, to);
835 #endif
836 error = kern_symlink(td, path, to, UIO_SYSSPACE);
837 LFREEPATH(path);
838 LFREEPATH(to);
839 return (error);
840 }
841
842 int
843 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args)
844 {
845 char *path, *to;
846 int error, dfd;
847
848 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
849 LCONVPATHEXIST_AT(td, args->oldname, &path, dfd);
850 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
851 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd);
852 if (to == NULL) {
853 LFREEPATH(path);
854 return (error);
855 }
856
857 #ifdef DEBUG
858 if (ldebug(symlinkat))
859 printf(ARGS(symlinkat, "%s, %s"), path, to);
860 #endif
861
862 error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE);
863 LFREEPATH(path);
864 LFREEPATH(to);
865 return (error);
866 }
867
868 int
869 linux_readlink(struct thread *td, struct linux_readlink_args *args)
870 {
871 char *name;
872 int error;
873
874 LCONVPATHEXIST(td, args->name, &name);
875
876 #ifdef DEBUG
877 if (ldebug(readlink))
878 printf(ARGS(readlink, "%s, %p, %d"), name, (void *)args->buf,
879 args->count);
880 #endif
881 error = kern_readlink(td, name, UIO_SYSSPACE, args->buf, UIO_USERSPACE,
882 args->count);
883 LFREEPATH(name);
884 return (error);
885 }
886
887 int
888 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args)
889 {
890 char *name;
891 int error, dfd;
892
893 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
894 LCONVPATHEXIST_AT(td, args->path, &name, dfd);
895
896 #ifdef DEBUG
897 if (ldebug(readlinkat))
898 printf(ARGS(readlinkat, "%s, %p, %d"), name, (void *)args->buf,
899 args->bufsiz);
900 #endif
901
902 error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf,
903 UIO_USERSPACE, args->bufsiz);
904 LFREEPATH(name);
905 return (error);
906 }
907
908 int
909 linux_truncate(struct thread *td, struct linux_truncate_args *args)
910 {
911 char *path;
912 int error;
913
914 LCONVPATHEXIST(td, args->path, &path);
915
916 #ifdef DEBUG
917 if (ldebug(truncate))
918 printf(ARGS(truncate, "%s, %ld"), path, (long)args->length);
919 #endif
920
921 error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
922 LFREEPATH(path);
923 return (error);
924 }
925
926 int
927 linux_truncate64(struct thread *td, struct linux_truncate64_args *args)
928 {
929 char *path;
930 int error;
931
932 LCONVPATHEXIST(td, args->path, &path);
933
934 #ifdef DEBUG
935 if (ldebug(truncate64))
936 printf(ARGS(truncate64, "%s, %jd"), path, args->length);
937 #endif
938
939 error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
940 LFREEPATH(path);
941 return (error);
942 }
943 int
944 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args)
945 {
946 struct ftruncate_args /* {
947 int fd;
948 int pad;
949 off_t length;
950 } */ nuap;
951
952 nuap.fd = args->fd;
953 nuap.length = args->length;
954 return (sys_ftruncate(td, &nuap));
955 }
956
957 int
958 linux_link(struct thread *td, struct linux_link_args *args)
959 {
960 char *path, *to;
961 int error;
962
963 LCONVPATHEXIST(td, args->path, &path);
964 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
965 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
966 if (to == NULL) {
967 LFREEPATH(path);
968 return (error);
969 }
970
971 #ifdef DEBUG
972 if (ldebug(link))
973 printf(ARGS(link, "%s, %s"), path, to);
974 #endif
975 error = kern_link(td, path, to, UIO_SYSSPACE);
976 LFREEPATH(path);
977 LFREEPATH(to);
978 return (error);
979 }
980
981 int
982 linux_linkat(struct thread *td, struct linux_linkat_args *args)
983 {
984 char *path, *to;
985 int error, olddfd, newdfd, follow;
986
987 if (args->flag & ~LINUX_AT_SYMLINK_FOLLOW)
988 return (EINVAL);
989
990 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
991 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
992 LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd);
993 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
994 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
995 if (to == NULL) {
996 LFREEPATH(path);
997 return (error);
998 }
999
1000 #ifdef DEBUG
1001 if (ldebug(linkat))
1002 printf(ARGS(linkat, "%i, %s, %i, %s, %i"), args->olddfd, path,
1003 args->newdfd, to, args->flag);
1004 #endif
1005
1006 follow = (args->flag & LINUX_AT_SYMLINK_FOLLOW) == 0 ? NOFOLLOW :
1007 FOLLOW;
1008 error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, follow);
1009 LFREEPATH(path);
1010 LFREEPATH(to);
1011 return (error);
1012 }
1013
1014 int
1015 linux_fdatasync(td, uap)
1016 struct thread *td;
1017 struct linux_fdatasync_args *uap;
1018 {
1019 struct fsync_args bsd;
1020
1021 bsd.fd = uap->fd;
1022 return sys_fsync(td, &bsd);
1023 }
1024
1025 int
1026 linux_pread(td, uap)
1027 struct thread *td;
1028 struct linux_pread_args *uap;
1029 {
1030 struct pread_args bsd;
1031 cap_rights_t rights;
1032 struct vnode *vp;
1033 int error;
1034
1035 bsd.fd = uap->fd;
1036 bsd.buf = uap->buf;
1037 bsd.nbyte = uap->nbyte;
1038 bsd.offset = uap->offset;
1039
1040 error = sys_pread(td, &bsd);
1041
1042 if (error == 0) {
1043 /* This seems to violate POSIX but linux does it */
1044 error = fgetvp(td, uap->fd,
1045 cap_rights_init(&rights, CAP_PREAD), &vp);
1046 if (error != 0)
1047 return (error);
1048 if (vp->v_type == VDIR) {
1049 vrele(vp);
1050 return (EISDIR);
1051 }
1052 vrele(vp);
1053 }
1054
1055 return (error);
1056 }
1057
1058 int
1059 linux_pwrite(td, uap)
1060 struct thread *td;
1061 struct linux_pwrite_args *uap;
1062 {
1063 struct pwrite_args bsd;
1064
1065 bsd.fd = uap->fd;
1066 bsd.buf = uap->buf;
1067 bsd.nbyte = uap->nbyte;
1068 bsd.offset = uap->offset;
1069 return sys_pwrite(td, &bsd);
1070 }
1071
1072 int
1073 linux_mount(struct thread *td, struct linux_mount_args *args)
1074 {
1075 struct ufs_args ufs;
1076 char fstypename[MFSNAMELEN];
1077 char mntonname[MNAMELEN], mntfromname[MNAMELEN];
1078 int error;
1079 int fsflags;
1080 void *fsdata;
1081
1082 error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1,
1083 NULL);
1084 if (error)
1085 return (error);
1086 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL);
1087 if (error)
1088 return (error);
1089 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL);
1090 if (error)
1091 return (error);
1092
1093 #ifdef DEBUG
1094 if (ldebug(mount))
1095 printf(ARGS(mount, "%s, %s, %s"),
1096 fstypename, mntfromname, mntonname);
1097 #endif
1098
1099 if (strcmp(fstypename, "ext2") == 0) {
1100 strcpy(fstypename, "ext2fs");
1101 fsdata = &ufs;
1102 ufs.fspec = mntfromname;
1103 #define DEFAULT_ROOTID -2
1104 ufs.export.ex_root = DEFAULT_ROOTID;
1105 ufs.export.ex_flags =
1106 args->rwflag & LINUX_MS_RDONLY ? MNT_EXRDONLY : 0;
1107 } else if (strcmp(fstypename, "proc") == 0) {
1108 strcpy(fstypename, "linprocfs");
1109 fsdata = NULL;
1110 } else if (strcmp(fstypename, "vfat") == 0) {
1111 strcpy(fstypename, "msdosfs");
1112 fsdata = NULL;
1113 } else {
1114 return (ENODEV);
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 if (strcmp(fstypename, "linprocfs") == 0) {
1135 error = kernel_vmount(fsflags,
1136 "fstype", fstypename,
1137 "fspath", mntonname,
1138 NULL);
1139 } else if (strcmp(fstypename, "msdosfs") == 0) {
1140 error = kernel_vmount(fsflags,
1141 "fstype", fstypename,
1142 "fspath", mntonname,
1143 "from", mntfromname,
1144 NULL);
1145 } else
1146 error = EOPNOTSUPP;
1147 return (error);
1148 }
1149
1150 int
1151 linux_oldumount(struct thread *td, struct linux_oldumount_args *args)
1152 {
1153 struct linux_umount_args args2;
1154
1155 args2.path = args->path;
1156 args2.flags = 0;
1157 return (linux_umount(td, &args2));
1158 }
1159
1160 int
1161 linux_umount(struct thread *td, struct linux_umount_args *args)
1162 {
1163 struct unmount_args bsd;
1164
1165 bsd.path = args->path;
1166 bsd.flags = args->flags; /* XXX correct? */
1167 return (sys_unmount(td, &bsd));
1168 }
1169
1170 /*
1171 * fcntl family of syscalls
1172 */
1173
1174 struct l_flock {
1175 l_short l_type;
1176 l_short l_whence;
1177 l_off_t l_start;
1178 l_off_t l_len;
1179 l_pid_t l_pid;
1180 }
1181 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1182 __packed
1183 #endif
1184 ;
1185
1186 static void
1187 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock)
1188 {
1189 switch (linux_flock->l_type) {
1190 case LINUX_F_RDLCK:
1191 bsd_flock->l_type = F_RDLCK;
1192 break;
1193 case LINUX_F_WRLCK:
1194 bsd_flock->l_type = F_WRLCK;
1195 break;
1196 case LINUX_F_UNLCK:
1197 bsd_flock->l_type = F_UNLCK;
1198 break;
1199 default:
1200 bsd_flock->l_type = -1;
1201 break;
1202 }
1203 bsd_flock->l_whence = linux_flock->l_whence;
1204 bsd_flock->l_start = (off_t)linux_flock->l_start;
1205 bsd_flock->l_len = (off_t)linux_flock->l_len;
1206 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1207 bsd_flock->l_sysid = 0;
1208 }
1209
1210 static void
1211 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock)
1212 {
1213 switch (bsd_flock->l_type) {
1214 case F_RDLCK:
1215 linux_flock->l_type = LINUX_F_RDLCK;
1216 break;
1217 case F_WRLCK:
1218 linux_flock->l_type = LINUX_F_WRLCK;
1219 break;
1220 case F_UNLCK:
1221 linux_flock->l_type = LINUX_F_UNLCK;
1222 break;
1223 }
1224 linux_flock->l_whence = bsd_flock->l_whence;
1225 linux_flock->l_start = (l_off_t)bsd_flock->l_start;
1226 linux_flock->l_len = (l_off_t)bsd_flock->l_len;
1227 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1228 }
1229
1230 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1231 struct l_flock64 {
1232 l_short l_type;
1233 l_short l_whence;
1234 l_loff_t l_start;
1235 l_loff_t l_len;
1236 l_pid_t l_pid;
1237 }
1238 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1239 __packed
1240 #endif
1241 ;
1242
1243 static void
1244 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock)
1245 {
1246 switch (linux_flock->l_type) {
1247 case LINUX_F_RDLCK:
1248 bsd_flock->l_type = F_RDLCK;
1249 break;
1250 case LINUX_F_WRLCK:
1251 bsd_flock->l_type = F_WRLCK;
1252 break;
1253 case LINUX_F_UNLCK:
1254 bsd_flock->l_type = F_UNLCK;
1255 break;
1256 default:
1257 bsd_flock->l_type = -1;
1258 break;
1259 }
1260 bsd_flock->l_whence = linux_flock->l_whence;
1261 bsd_flock->l_start = (off_t)linux_flock->l_start;
1262 bsd_flock->l_len = (off_t)linux_flock->l_len;
1263 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1264 bsd_flock->l_sysid = 0;
1265 }
1266
1267 static void
1268 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock)
1269 {
1270 switch (bsd_flock->l_type) {
1271 case F_RDLCK:
1272 linux_flock->l_type = LINUX_F_RDLCK;
1273 break;
1274 case F_WRLCK:
1275 linux_flock->l_type = LINUX_F_WRLCK;
1276 break;
1277 case F_UNLCK:
1278 linux_flock->l_type = LINUX_F_UNLCK;
1279 break;
1280 }
1281 linux_flock->l_whence = bsd_flock->l_whence;
1282 linux_flock->l_start = (l_loff_t)bsd_flock->l_start;
1283 linux_flock->l_len = (l_loff_t)bsd_flock->l_len;
1284 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1285 }
1286 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1287
1288 static int
1289 fcntl_common(struct thread *td, struct linux_fcntl64_args *args)
1290 {
1291 struct l_flock linux_flock;
1292 struct flock bsd_flock;
1293 cap_rights_t rights;
1294 struct file *fp;
1295 long arg;
1296 int error, result;
1297
1298 switch (args->cmd) {
1299 case LINUX_F_DUPFD:
1300 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg));
1301
1302 case LINUX_F_GETFD:
1303 return (kern_fcntl(td, args->fd, F_GETFD, 0));
1304
1305 case LINUX_F_SETFD:
1306 return (kern_fcntl(td, args->fd, F_SETFD, args->arg));
1307
1308 case LINUX_F_GETFL:
1309 error = kern_fcntl(td, args->fd, F_GETFL, 0);
1310 result = td->td_retval[0];
1311 td->td_retval[0] = 0;
1312 if (result & O_RDONLY)
1313 td->td_retval[0] |= LINUX_O_RDONLY;
1314 if (result & O_WRONLY)
1315 td->td_retval[0] |= LINUX_O_WRONLY;
1316 if (result & O_RDWR)
1317 td->td_retval[0] |= LINUX_O_RDWR;
1318 if (result & O_NDELAY)
1319 td->td_retval[0] |= LINUX_O_NONBLOCK;
1320 if (result & O_APPEND)
1321 td->td_retval[0] |= LINUX_O_APPEND;
1322 if (result & O_FSYNC)
1323 td->td_retval[0] |= LINUX_O_SYNC;
1324 if (result & O_ASYNC)
1325 td->td_retval[0] |= LINUX_FASYNC;
1326 #ifdef LINUX_O_NOFOLLOW
1327 if (result & O_NOFOLLOW)
1328 td->td_retval[0] |= LINUX_O_NOFOLLOW;
1329 #endif
1330 #ifdef LINUX_O_DIRECT
1331 if (result & O_DIRECT)
1332 td->td_retval[0] |= LINUX_O_DIRECT;
1333 #endif
1334 return (error);
1335
1336 case LINUX_F_SETFL:
1337 arg = 0;
1338 if (args->arg & LINUX_O_NDELAY)
1339 arg |= O_NONBLOCK;
1340 if (args->arg & LINUX_O_APPEND)
1341 arg |= O_APPEND;
1342 if (args->arg & LINUX_O_SYNC)
1343 arg |= O_FSYNC;
1344 if (args->arg & LINUX_FASYNC)
1345 arg |= O_ASYNC;
1346 #ifdef LINUX_O_NOFOLLOW
1347 if (args->arg & LINUX_O_NOFOLLOW)
1348 arg |= O_NOFOLLOW;
1349 #endif
1350 #ifdef LINUX_O_DIRECT
1351 if (args->arg & LINUX_O_DIRECT)
1352 arg |= O_DIRECT;
1353 #endif
1354 return (kern_fcntl(td, args->fd, F_SETFL, arg));
1355
1356 case LINUX_F_GETLK:
1357 error = copyin((void *)args->arg, &linux_flock,
1358 sizeof(linux_flock));
1359 if (error)
1360 return (error);
1361 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1362 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1363 if (error)
1364 return (error);
1365 bsd_to_linux_flock(&bsd_flock, &linux_flock);
1366 return (copyout(&linux_flock, (void *)args->arg,
1367 sizeof(linux_flock)));
1368
1369 case LINUX_F_SETLK:
1370 error = copyin((void *)args->arg, &linux_flock,
1371 sizeof(linux_flock));
1372 if (error)
1373 return (error);
1374 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1375 return (kern_fcntl(td, args->fd, F_SETLK,
1376 (intptr_t)&bsd_flock));
1377
1378 case LINUX_F_SETLKW:
1379 error = copyin((void *)args->arg, &linux_flock,
1380 sizeof(linux_flock));
1381 if (error)
1382 return (error);
1383 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1384 return (kern_fcntl(td, args->fd, F_SETLKW,
1385 (intptr_t)&bsd_flock));
1386
1387 case LINUX_F_GETOWN:
1388 return (kern_fcntl(td, args->fd, F_GETOWN, 0));
1389
1390 case LINUX_F_SETOWN:
1391 /*
1392 * XXX some Linux applications depend on F_SETOWN having no
1393 * significant effect for pipes (SIGIO is not delivered for
1394 * pipes under Linux-2.2.35 at least).
1395 */
1396 error = fget(td, args->fd,
1397 cap_rights_init(&rights, CAP_FCNTL), &fp);
1398 if (error)
1399 return (error);
1400 if (fp->f_type == DTYPE_PIPE) {
1401 fdrop(fp, td);
1402 return (EINVAL);
1403 }
1404 fdrop(fp, td);
1405
1406 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg));
1407 }
1408
1409 return (EINVAL);
1410 }
1411
1412 int
1413 linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
1414 {
1415 struct linux_fcntl64_args args64;
1416
1417 #ifdef DEBUG
1418 if (ldebug(fcntl))
1419 printf(ARGS(fcntl, "%d, %08x, *"), args->fd, args->cmd);
1420 #endif
1421
1422 args64.fd = args->fd;
1423 args64.cmd = args->cmd;
1424 args64.arg = args->arg;
1425 return (fcntl_common(td, &args64));
1426 }
1427
1428 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1429 int
1430 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args)
1431 {
1432 struct l_flock64 linux_flock;
1433 struct flock bsd_flock;
1434 int error;
1435
1436 #ifdef DEBUG
1437 if (ldebug(fcntl64))
1438 printf(ARGS(fcntl64, "%d, %08x, *"), args->fd, args->cmd);
1439 #endif
1440
1441 switch (args->cmd) {
1442 case LINUX_F_GETLK64:
1443 error = copyin((void *)args->arg, &linux_flock,
1444 sizeof(linux_flock));
1445 if (error)
1446 return (error);
1447 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1448 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1449 if (error)
1450 return (error);
1451 bsd_to_linux_flock64(&bsd_flock, &linux_flock);
1452 return (copyout(&linux_flock, (void *)args->arg,
1453 sizeof(linux_flock)));
1454
1455 case LINUX_F_SETLK64:
1456 error = copyin((void *)args->arg, &linux_flock,
1457 sizeof(linux_flock));
1458 if (error)
1459 return (error);
1460 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1461 return (kern_fcntl(td, args->fd, F_SETLK,
1462 (intptr_t)&bsd_flock));
1463
1464 case LINUX_F_SETLKW64:
1465 error = copyin((void *)args->arg, &linux_flock,
1466 sizeof(linux_flock));
1467 if (error)
1468 return (error);
1469 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1470 return (kern_fcntl(td, args->fd, F_SETLKW,
1471 (intptr_t)&bsd_flock));
1472 }
1473
1474 return (fcntl_common(td, args));
1475 }
1476 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1477
1478 int
1479 linux_chown(struct thread *td, struct linux_chown_args *args)
1480 {
1481 char *path;
1482 int error;
1483
1484 LCONVPATHEXIST(td, args->path, &path);
1485
1486 #ifdef DEBUG
1487 if (ldebug(chown))
1488 printf(ARGS(chown, "%s, %d, %d"), path, args->uid, args->gid);
1489 #endif
1490 error = kern_chown(td, path, UIO_SYSSPACE, args->uid, args->gid);
1491 LFREEPATH(path);
1492 return (error);
1493 }
1494
1495 int
1496 linux_fchownat(struct thread *td, struct linux_fchownat_args *args)
1497 {
1498 char *path;
1499 int error, dfd, flag;
1500
1501 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
1502 return (EINVAL);
1503
1504 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
1505 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
1506
1507 #ifdef DEBUG
1508 if (ldebug(fchownat))
1509 printf(ARGS(fchownat, "%s, %d, %d"), path, args->uid, args->gid);
1510 #endif
1511
1512 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 :
1513 AT_SYMLINK_NOFOLLOW;
1514 error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid,
1515 flag);
1516 LFREEPATH(path);
1517 return (error);
1518 }
1519
1520 int
1521 linux_lchown(struct thread *td, struct linux_lchown_args *args)
1522 {
1523 char *path;
1524 int error;
1525
1526 LCONVPATHEXIST(td, args->path, &path);
1527
1528 #ifdef DEBUG
1529 if (ldebug(lchown))
1530 printf(ARGS(lchown, "%s, %d, %d"), path, args->uid, args->gid);
1531 #endif
1532 error = kern_lchown(td, path, UIO_SYSSPACE, args->uid, args->gid);
1533 LFREEPATH(path);
1534 return (error);
1535 }
1536
1537 static int
1538 convert_fadvice(int advice)
1539 {
1540 switch (advice) {
1541 case LINUX_POSIX_FADV_NORMAL:
1542 return (POSIX_FADV_NORMAL);
1543 case LINUX_POSIX_FADV_RANDOM:
1544 return (POSIX_FADV_RANDOM);
1545 case LINUX_POSIX_FADV_SEQUENTIAL:
1546 return (POSIX_FADV_SEQUENTIAL);
1547 case LINUX_POSIX_FADV_WILLNEED:
1548 return (POSIX_FADV_WILLNEED);
1549 case LINUX_POSIX_FADV_DONTNEED:
1550 return (POSIX_FADV_DONTNEED);
1551 case LINUX_POSIX_FADV_NOREUSE:
1552 return (POSIX_FADV_NOREUSE);
1553 default:
1554 return (-1);
1555 }
1556 }
1557
1558 int
1559 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args)
1560 {
1561 int advice;
1562
1563 advice = convert_fadvice(args->advice);
1564 if (advice == -1)
1565 return (EINVAL);
1566 return (kern_posix_fadvise(td, args->fd, args->offset, args->len,
1567 advice));
1568 }
1569
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
1582 int
1583 linux_pipe(struct thread *td, struct linux_pipe_args *args)
1584 {
1585 int fildes[2];
1586 int error;
1587
1588 #ifdef DEBUG
1589 if (ldebug(pipe))
1590 printf(ARGS(pipe, "*"));
1591 #endif
1592
1593 error = kern_pipe2(td, fildes, 0);
1594 if (error)
1595 return (error);
1596
1597 /* XXX: Close descriptors on error. */
1598 return (copyout(fildes, args->pipefds, sizeof(fildes)));
1599 }
1600
1601 int
1602 linux_pipe2(struct thread *td, struct linux_pipe2_args *args)
1603 {
1604 int fildes[2];
1605 int error, flags;
1606
1607 #ifdef DEBUG
1608 if (ldebug(pipe2))
1609 printf(ARGS(pipe2, "*, %d"), args->flags);
1610 #endif
1611
1612 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0)
1613 return (EINVAL);
1614
1615 flags = 0;
1616 if ((args->flags & LINUX_O_NONBLOCK) != 0)
1617 flags |= O_NONBLOCK;
1618 if ((args->flags & LINUX_O_CLOEXEC) != 0)
1619 flags |= O_CLOEXEC;
1620 error = kern_pipe2(td, fildes, flags);
1621 if (error)
1622 return (error);
1623
1624 /* XXX: Close descriptors on error. */
1625 return (copyout(fildes, args->pipefds, sizeof(fildes)));
1626 }
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