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("$FreeBSD$");
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
linux_creat(struct thread * td,struct linux_creat_args * args)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_openat(td, AT_FDCWD, path, UIO_SYSSPACE,
82 O_WRONLY | O_CREAT | O_TRUNC, args->mode);
83 LFREEPATH(path);
84 return (error);
85 }
86
87
88 static int
linux_common_open(struct thread * td,int dirfd,char * path,int l_flags,int mode)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
linux_openat(struct thread * td,struct linux_openat_args * args)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
linux_open(struct thread * td,struct linux_open_args * args)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
linux_lseek(struct thread * td,struct linux_lseek_args * args)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
linux_llseek(struct thread * td,struct linux_llseek_args * args)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
linux_readdir(struct thread * td,struct linux_readdir_args * args)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
getdents_common(struct thread * td,struct linux_getdents64_args * args,int is64bit)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, args->fd, cap_rights_init(&rights, CAP_READ), &fp);
352 if (error != 0)
353 return (error);
354
355 if ((fp->f_flag & FREAD) == 0) {
356 fdrop(fp, td);
357 return (EBADF);
358 }
359
360 off = foffset_lock(fp, 0);
361 vp = fp->f_vnode;
362 if (vp->v_type != VDIR) {
363 foffset_unlock(fp, off, 0);
364 fdrop(fp, td);
365 return (EINVAL);
366 }
367
368
369 buflen = max(LINUX_DIRBLKSIZ, nbytes);
370 buflen = min(buflen, MAXBSIZE);
371 buf = malloc(buflen, M_LINUX, M_WAITOK);
372 lbuf = malloc(LINUX_MAXRECLEN, M_LINUX, M_WAITOK | M_ZERO);
373 vn_lock(vp, LK_SHARED | LK_RETRY);
374
375 aiov.iov_base = buf;
376 aiov.iov_len = buflen;
377 auio.uio_iov = &aiov;
378 auio.uio_iovcnt = 1;
379 auio.uio_rw = UIO_READ;
380 auio.uio_segflg = UIO_SYSSPACE;
381 auio.uio_td = td;
382 auio.uio_resid = buflen;
383 auio.uio_offset = off;
384
385 #ifdef MAC
386 /*
387 * Do directory search MAC check using non-cached credentials.
388 */
389 if ((error = mac_vnode_check_readdir(td->td_ucred, vp)))
390 goto out;
391 #endif /* MAC */
392 if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies,
393 &cookies)))
394 goto out;
395
396 inp = buf;
397 outp = (caddr_t)args->dirent;
398 resid = nbytes;
399 if ((len = buflen - auio.uio_resid) <= 0)
400 goto eof;
401
402 cookiep = cookies;
403
404 if (cookies) {
405 /*
406 * When using cookies, the vfs has the option of reading from
407 * a different offset than that supplied (UFS truncates the
408 * offset to a block boundary to make sure that it never reads
409 * partway through a directory entry, even if the directory
410 * has been compacted).
411 */
412 while (len > 0 && ncookies > 0 && *cookiep <= off) {
413 bdp = (struct dirent *) inp;
414 len -= bdp->d_reclen;
415 inp += bdp->d_reclen;
416 cookiep++;
417 ncookies--;
418 }
419 }
420
421 while (len > 0) {
422 if (cookiep && ncookies == 0)
423 break;
424 bdp = (struct dirent *) inp;
425 reclen = bdp->d_reclen;
426 if (reclen & 3) {
427 error = EFAULT;
428 goto out;
429 }
430
431 if (bdp->d_fileno == 0) {
432 inp += reclen;
433 if (cookiep) {
434 off = *cookiep++;
435 ncookies--;
436 } else
437 off += reclen;
438
439 len -= reclen;
440 continue;
441 }
442
443 linuxreclen = (is64bit)
444 ? LINUX_RECLEN64(bdp->d_namlen)
445 : LINUX_RECLEN(bdp->d_namlen);
446
447 if (reclen > len || resid < linuxreclen) {
448 outp++;
449 break;
450 }
451
452 if (justone) {
453 /* readdir(2) case. */
454 linux_dirent = (struct l_dirent*)lbuf;
455 linux_dirent->d_ino = bdp->d_fileno;
456 linux_dirent->d_off = (l_off_t)linuxreclen;
457 linux_dirent->d_reclen = (l_ushort)bdp->d_namlen;
458 strlcpy(linux_dirent->d_name, bdp->d_name,
459 linuxreclen - offsetof(struct l_dirent, d_name));
460 error = copyout(linux_dirent, outp, linuxreclen);
461 }
462 if (is64bit) {
463 linux_dirent64 = (struct l_dirent64*)lbuf;
464 linux_dirent64->d_ino = bdp->d_fileno;
465 linux_dirent64->d_off = (cookiep)
466 ? (l_off_t)*cookiep
467 : (l_off_t)(off + reclen);
468 linux_dirent64->d_reclen = (l_ushort)linuxreclen;
469 linux_dirent64->d_type = bdp->d_type;
470 strlcpy(linux_dirent64->d_name, bdp->d_name,
471 linuxreclen - offsetof(struct l_dirent64, d_name));
472 error = copyout(linux_dirent64, outp, linuxreclen);
473 } else if (!justone) {
474 linux_dirent = (struct l_dirent*)lbuf;
475 linux_dirent->d_ino = bdp->d_fileno;
476 linux_dirent->d_off = (cookiep)
477 ? (l_off_t)*cookiep
478 : (l_off_t)(off + reclen);
479 linux_dirent->d_reclen = (l_ushort)linuxreclen;
480 /*
481 * Copy d_type to last byte of l_dirent buffer
482 */
483 lbuf[linuxreclen-1] = bdp->d_type;
484 strlcpy(linux_dirent->d_name, bdp->d_name,
485 linuxreclen - offsetof(struct l_dirent, d_name)-1);
486 error = copyout(linux_dirent, outp, linuxreclen);
487 }
488
489 if (error)
490 goto out;
491
492 inp += reclen;
493 if (cookiep) {
494 off = *cookiep++;
495 ncookies--;
496 } else
497 off += reclen;
498
499 outp += linuxreclen;
500 resid -= linuxreclen;
501 len -= reclen;
502 if (justone)
503 break;
504 }
505
506 if (outp == (caddr_t)args->dirent) {
507 nbytes = resid;
508 goto eof;
509 }
510
511 if (justone)
512 nbytes = resid + linuxreclen;
513
514 eof:
515 td->td_retval[0] = nbytes - resid;
516
517 out:
518 free(cookies, M_TEMP);
519
520 VOP_UNLOCK(vp, 0);
521 foffset_unlock(fp, off, 0);
522 fdrop(fp, td);
523 free(buf, M_LINUX);
524 free(lbuf, M_LINUX);
525 return (error);
526 }
527
528 int
linux_getdents(struct thread * td,struct linux_getdents_args * args)529 linux_getdents(struct thread *td, struct linux_getdents_args *args)
530 {
531
532 #ifdef DEBUG
533 if (ldebug(getdents))
534 printf(ARGS(getdents, "%d, *, %d"), args->fd, args->count);
535 #endif
536
537 return (getdents_common(td, (struct linux_getdents64_args*)args, 0));
538 }
539
540 int
linux_getdents64(struct thread * td,struct linux_getdents64_args * args)541 linux_getdents64(struct thread *td, struct linux_getdents64_args *args)
542 {
543
544 #ifdef DEBUG
545 if (ldebug(getdents64))
546 printf(ARGS(getdents64, "%d, *, %d"), args->fd, args->count);
547 #endif
548
549 return (getdents_common(td, args, 1));
550 }
551
552 /*
553 * These exist mainly for hooks for doing /compat/linux translation.
554 */
555
556 int
linux_access(struct thread * td,struct linux_access_args * args)557 linux_access(struct thread *td, struct linux_access_args *args)
558 {
559 char *path;
560 int error;
561
562 /* linux convention */
563 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
564 return (EINVAL);
565
566 LCONVPATHEXIST(td, args->path, &path);
567
568 #ifdef DEBUG
569 if (ldebug(access))
570 printf(ARGS(access, "%s, %d"), path, args->amode);
571 #endif
572 error = kern_accessat(td, AT_FDCWD, path, UIO_SYSSPACE, 0,
573 args->amode);
574 LFREEPATH(path);
575
576 return (error);
577 }
578
579 int
linux_faccessat(struct thread * td,struct linux_faccessat_args * args)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
linux_unlink(struct thread * td,struct linux_unlink_args * args)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_unlinkat(td, AT_FDCWD, path, UIO_SYSSPACE, 0);
618 if (error == EPERM) {
619 /* Introduce POSIX noncompliant behaviour of Linux */
620 if (kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE, &st,
621 NULL) == 0) {
622 if (S_ISDIR(st.st_mode))
623 error = EISDIR;
624 }
625 }
626 LFREEPATH(path);
627 return (error);
628 }
629
630 int
linux_unlinkat(struct thread * td,struct linux_unlinkat_args * args)631 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args)
632 {
633 char *path;
634 int error, dfd;
635 struct stat st;
636
637 if (args->flag & ~LINUX_AT_REMOVEDIR)
638 return (EINVAL);
639
640 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
641 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
642
643 #ifdef DEBUG
644 if (ldebug(unlinkat))
645 printf(ARGS(unlinkat, "%s"), path);
646 #endif
647
648 if (args->flag & LINUX_AT_REMOVEDIR)
649 error = kern_rmdirat(td, dfd, path, UIO_SYSSPACE);
650 else
651 error = kern_unlinkat(td, dfd, path, UIO_SYSSPACE, 0);
652 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) {
653 /* Introduce POSIX noncompliant behaviour of Linux */
654 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path,
655 UIO_SYSSPACE, &st, NULL) == 0 && S_ISDIR(st.st_mode))
656 error = EISDIR;
657 }
658 LFREEPATH(path);
659 return (error);
660 }
661 int
linux_chdir(struct thread * td,struct linux_chdir_args * args)662 linux_chdir(struct thread *td, struct linux_chdir_args *args)
663 {
664 char *path;
665 int error;
666
667 LCONVPATHEXIST(td, args->path, &path);
668
669 #ifdef DEBUG
670 if (ldebug(chdir))
671 printf(ARGS(chdir, "%s"), path);
672 #endif
673 error = kern_chdir(td, path, UIO_SYSSPACE);
674 LFREEPATH(path);
675 return (error);
676 }
677
678 int
linux_chmod(struct thread * td,struct linux_chmod_args * args)679 linux_chmod(struct thread *td, struct linux_chmod_args *args)
680 {
681 char *path;
682 int error;
683
684 LCONVPATHEXIST(td, args->path, &path);
685
686 #ifdef DEBUG
687 if (ldebug(chmod))
688 printf(ARGS(chmod, "%s, %d"), path, args->mode);
689 #endif
690 error = kern_fchmodat(td, AT_FDCWD, path, UIO_SYSSPACE,
691 args->mode, 0);
692 LFREEPATH(path);
693 return (error);
694 }
695
696 int
linux_fchmodat(struct thread * td,struct linux_fchmodat_args * args)697 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args)
698 {
699 char *path;
700 int error, dfd;
701
702 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
703 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
704
705 #ifdef DEBUG
706 if (ldebug(fchmodat))
707 printf(ARGS(fchmodat, "%s, %d"), path, args->mode);
708 #endif
709
710 error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0);
711 LFREEPATH(path);
712 return (error);
713 }
714
715 int
linux_mkdir(struct thread * td,struct linux_mkdir_args * args)716 linux_mkdir(struct thread *td, struct linux_mkdir_args *args)
717 {
718 char *path;
719 int error;
720
721 LCONVPATHCREAT(td, args->path, &path);
722
723 #ifdef DEBUG
724 if (ldebug(mkdir))
725 printf(ARGS(mkdir, "%s, %d"), path, args->mode);
726 #endif
727 error = kern_mkdirat(td, AT_FDCWD, path, UIO_SYSSPACE, args->mode);
728 LFREEPATH(path);
729 return (error);
730 }
731
732 int
linux_mkdirat(struct thread * td,struct linux_mkdirat_args * args)733 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args)
734 {
735 char *path;
736 int error, dfd;
737
738 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
739 LCONVPATHCREAT_AT(td, args->pathname, &path, dfd);
740
741 #ifdef DEBUG
742 if (ldebug(mkdirat))
743 printf(ARGS(mkdirat, "%s, %d"), path, args->mode);
744 #endif
745 error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode);
746 LFREEPATH(path);
747 return (error);
748 }
749
750 int
linux_rmdir(struct thread * td,struct linux_rmdir_args * args)751 linux_rmdir(struct thread *td, struct linux_rmdir_args *args)
752 {
753 char *path;
754 int error;
755
756 LCONVPATHEXIST(td, args->path, &path);
757
758 #ifdef DEBUG
759 if (ldebug(rmdir))
760 printf(ARGS(rmdir, "%s"), path);
761 #endif
762 error = kern_rmdirat(td, AT_FDCWD, path, UIO_SYSSPACE);
763 LFREEPATH(path);
764 return (error);
765 }
766
767 int
linux_rename(struct thread * td,struct linux_rename_args * args)768 linux_rename(struct thread *td, struct linux_rename_args *args)
769 {
770 char *from, *to;
771 int error;
772
773 LCONVPATHEXIST(td, args->from, &from);
774 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
775 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
776 if (to == NULL) {
777 LFREEPATH(from);
778 return (error);
779 }
780
781 #ifdef DEBUG
782 if (ldebug(rename))
783 printf(ARGS(rename, "%s, %s"), from, to);
784 #endif
785 error = kern_renameat(td, AT_FDCWD, from, AT_FDCWD, to, UIO_SYSSPACE);
786 LFREEPATH(from);
787 LFREEPATH(to);
788 return (error);
789 }
790
791 int
linux_renameat(struct thread * td,struct linux_renameat_args * args)792 linux_renameat(struct thread *td, struct linux_renameat_args *args)
793 {
794 char *from, *to;
795 int error, olddfd, newdfd;
796
797 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
798 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
799 LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd);
800 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
801 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
802 if (to == NULL) {
803 LFREEPATH(from);
804 return (error);
805 }
806
807 #ifdef DEBUG
808 if (ldebug(renameat))
809 printf(ARGS(renameat, "%s, %s"), from, to);
810 #endif
811 error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE);
812 LFREEPATH(from);
813 LFREEPATH(to);
814 return (error);
815 }
816
817 int
linux_symlink(struct thread * td,struct linux_symlink_args * args)818 linux_symlink(struct thread *td, struct linux_symlink_args *args)
819 {
820 char *path, *to;
821 int error;
822
823 LCONVPATHEXIST(td, args->path, &path);
824 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
825 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
826 if (to == NULL) {
827 LFREEPATH(path);
828 return (error);
829 }
830
831 #ifdef DEBUG
832 if (ldebug(symlink))
833 printf(ARGS(symlink, "%s, %s"), path, to);
834 #endif
835 error = kern_symlinkat(td, path, AT_FDCWD, to, UIO_SYSSPACE);
836 LFREEPATH(path);
837 LFREEPATH(to);
838 return (error);
839 }
840
841 int
linux_symlinkat(struct thread * td,struct linux_symlinkat_args * args)842 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args)
843 {
844 char *path, *to;
845 int error, dfd;
846
847 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
848 LCONVPATHEXIST_AT(td, args->oldname, &path, dfd);
849 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
850 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd);
851 if (to == NULL) {
852 LFREEPATH(path);
853 return (error);
854 }
855
856 #ifdef DEBUG
857 if (ldebug(symlinkat))
858 printf(ARGS(symlinkat, "%s, %s"), path, to);
859 #endif
860
861 error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE);
862 LFREEPATH(path);
863 LFREEPATH(to);
864 return (error);
865 }
866
867 int
linux_readlink(struct thread * td,struct linux_readlink_args * args)868 linux_readlink(struct thread *td, struct linux_readlink_args *args)
869 {
870 char *name;
871 int error;
872
873 LCONVPATHEXIST(td, args->name, &name);
874
875 #ifdef DEBUG
876 if (ldebug(readlink))
877 printf(ARGS(readlink, "%s, %p, %d"), name, (void *)args->buf,
878 args->count);
879 #endif
880 error = kern_readlinkat(td, AT_FDCWD, name, UIO_SYSSPACE,
881 args->buf, UIO_USERSPACE, args->count);
882 LFREEPATH(name);
883 return (error);
884 }
885
886 int
linux_readlinkat(struct thread * td,struct linux_readlinkat_args * args)887 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args)
888 {
889 char *name;
890 int error, dfd;
891
892 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
893 LCONVPATHEXIST_AT(td, args->path, &name, dfd);
894
895 #ifdef DEBUG
896 if (ldebug(readlinkat))
897 printf(ARGS(readlinkat, "%s, %p, %d"), name, (void *)args->buf,
898 args->bufsiz);
899 #endif
900
901 error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf,
902 UIO_USERSPACE, args->bufsiz);
903 LFREEPATH(name);
904 return (error);
905 }
906
907 int
linux_truncate(struct thread * td,struct linux_truncate_args * args)908 linux_truncate(struct thread *td, struct linux_truncate_args *args)
909 {
910 char *path;
911 int error;
912
913 LCONVPATHEXIST(td, args->path, &path);
914
915 #ifdef DEBUG
916 if (ldebug(truncate))
917 printf(ARGS(truncate, "%s, %ld"), path, (long)args->length);
918 #endif
919
920 error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
921 LFREEPATH(path);
922 return (error);
923 }
924
925 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
926 int
linux_truncate64(struct thread * td,struct linux_truncate64_args * args)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 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
944
945 int
linux_ftruncate(struct thread * td,struct linux_ftruncate_args * args)946 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args)
947 {
948 struct ftruncate_args /* {
949 int fd;
950 int pad;
951 off_t length;
952 } */ nuap;
953
954 nuap.fd = args->fd;
955 nuap.length = args->length;
956 return (sys_ftruncate(td, &nuap));
957 }
958
959 int
linux_link(struct thread * td,struct linux_link_args * args)960 linux_link(struct thread *td, struct linux_link_args *args)
961 {
962 char *path, *to;
963 int error;
964
965 LCONVPATHEXIST(td, args->path, &path);
966 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
967 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
968 if (to == NULL) {
969 LFREEPATH(path);
970 return (error);
971 }
972
973 #ifdef DEBUG
974 if (ldebug(link))
975 printf(ARGS(link, "%s, %s"), path, to);
976 #endif
977 error = kern_linkat(td, AT_FDCWD, AT_FDCWD, path, to, UIO_SYSSPACE,
978 FOLLOW);
979 LFREEPATH(path);
980 LFREEPATH(to);
981 return (error);
982 }
983
984 int
linux_linkat(struct thread * td,struct linux_linkat_args * args)985 linux_linkat(struct thread *td, struct linux_linkat_args *args)
986 {
987 char *path, *to;
988 int error, olddfd, newdfd, follow;
989
990 if (args->flag & ~LINUX_AT_SYMLINK_FOLLOW)
991 return (EINVAL);
992
993 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
994 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
995 LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd);
996 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
997 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
998 if (to == NULL) {
999 LFREEPATH(path);
1000 return (error);
1001 }
1002
1003 #ifdef DEBUG
1004 if (ldebug(linkat))
1005 printf(ARGS(linkat, "%i, %s, %i, %s, %i"), args->olddfd, path,
1006 args->newdfd, to, args->flag);
1007 #endif
1008
1009 follow = (args->flag & LINUX_AT_SYMLINK_FOLLOW) == 0 ? NOFOLLOW :
1010 FOLLOW;
1011 error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, follow);
1012 LFREEPATH(path);
1013 LFREEPATH(to);
1014 return (error);
1015 }
1016
1017 int
linux_fdatasync(td,uap)1018 linux_fdatasync(td, uap)
1019 struct thread *td;
1020 struct linux_fdatasync_args *uap;
1021 {
1022 struct fsync_args bsd;
1023
1024 bsd.fd = uap->fd;
1025 return sys_fsync(td, &bsd);
1026 }
1027
1028 int
linux_pread(td,uap)1029 linux_pread(td, uap)
1030 struct thread *td;
1031 struct linux_pread_args *uap;
1032 {
1033 struct pread_args bsd;
1034 cap_rights_t rights;
1035 struct vnode *vp;
1036 int error;
1037
1038 bsd.fd = uap->fd;
1039 bsd.buf = uap->buf;
1040 bsd.nbyte = uap->nbyte;
1041 bsd.offset = uap->offset;
1042
1043 error = sys_pread(td, &bsd);
1044
1045 if (error == 0) {
1046 /* This seems to violate POSIX but linux does it */
1047 error = fgetvp(td, uap->fd,
1048 cap_rights_init(&rights, CAP_PREAD), &vp);
1049 if (error != 0)
1050 return (error);
1051 if (vp->v_type == VDIR) {
1052 vrele(vp);
1053 return (EISDIR);
1054 }
1055 vrele(vp);
1056 }
1057
1058 return (error);
1059 }
1060
1061 int
linux_pwrite(td,uap)1062 linux_pwrite(td, uap)
1063 struct thread *td;
1064 struct linux_pwrite_args *uap;
1065 {
1066 struct pwrite_args bsd;
1067
1068 bsd.fd = uap->fd;
1069 bsd.buf = uap->buf;
1070 bsd.nbyte = uap->nbyte;
1071 bsd.offset = uap->offset;
1072 return sys_pwrite(td, &bsd);
1073 }
1074
1075 int
linux_mount(struct thread * td,struct linux_mount_args * args)1076 linux_mount(struct thread *td, struct linux_mount_args *args)
1077 {
1078 char fstypename[MFSNAMELEN];
1079 char mntonname[MNAMELEN], mntfromname[MNAMELEN];
1080 int error;
1081 int fsflags;
1082
1083 error = copyinstr(args->filesystemtype, fstypename, MFSNAMELEN - 1,
1084 NULL);
1085 if (error)
1086 return (error);
1087 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL);
1088 if (error)
1089 return (error);
1090 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL);
1091 if (error)
1092 return (error);
1093
1094 #ifdef DEBUG
1095 if (ldebug(mount))
1096 printf(ARGS(mount, "%s, %s, %s"),
1097 fstypename, mntfromname, mntonname);
1098 #endif
1099
1100 if (strcmp(fstypename, "ext2") == 0) {
1101 strcpy(fstypename, "ext2fs");
1102 } else if (strcmp(fstypename, "proc") == 0) {
1103 strcpy(fstypename, "linprocfs");
1104 } else if (strcmp(fstypename, "vfat") == 0) {
1105 strcpy(fstypename, "msdosfs");
1106 }
1107
1108 fsflags = 0;
1109
1110 if ((args->rwflag & 0xffff0000) == 0xc0ed0000) {
1111 /*
1112 * Linux SYNC flag is not included; the closest equivalent
1113 * FreeBSD has is !ASYNC, which is our default.
1114 */
1115 if (args->rwflag & LINUX_MS_RDONLY)
1116 fsflags |= MNT_RDONLY;
1117 if (args->rwflag & LINUX_MS_NOSUID)
1118 fsflags |= MNT_NOSUID;
1119 if (args->rwflag & LINUX_MS_NOEXEC)
1120 fsflags |= MNT_NOEXEC;
1121 if (args->rwflag & LINUX_MS_REMOUNT)
1122 fsflags |= MNT_UPDATE;
1123 }
1124
1125 error = kernel_vmount(fsflags,
1126 "fstype", fstypename,
1127 "fspath", mntonname,
1128 "from", mntfromname,
1129 NULL);
1130 return (error);
1131 }
1132
1133 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1134 int
linux_oldumount(struct thread * td,struct linux_oldumount_args * args)1135 linux_oldumount(struct thread *td, struct linux_oldumount_args *args)
1136 {
1137 struct linux_umount_args args2;
1138
1139 args2.path = args->path;
1140 args2.flags = 0;
1141 return (linux_umount(td, &args2));
1142 }
1143 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1144
1145 int
linux_umount(struct thread * td,struct linux_umount_args * args)1146 linux_umount(struct thread *td, struct linux_umount_args *args)
1147 {
1148 struct unmount_args bsd;
1149
1150 bsd.path = args->path;
1151 bsd.flags = args->flags; /* XXX correct? */
1152 return (sys_unmount(td, &bsd));
1153 }
1154
1155 /*
1156 * fcntl family of syscalls
1157 */
1158
1159 struct l_flock {
1160 l_short l_type;
1161 l_short l_whence;
1162 l_off_t l_start;
1163 l_off_t l_len;
1164 l_pid_t l_pid;
1165 }
1166 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1167 __packed
1168 #endif
1169 ;
1170
1171 static void
linux_to_bsd_flock(struct l_flock * linux_flock,struct flock * bsd_flock)1172 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock)
1173 {
1174 switch (linux_flock->l_type) {
1175 case LINUX_F_RDLCK:
1176 bsd_flock->l_type = F_RDLCK;
1177 break;
1178 case LINUX_F_WRLCK:
1179 bsd_flock->l_type = F_WRLCK;
1180 break;
1181 case LINUX_F_UNLCK:
1182 bsd_flock->l_type = F_UNLCK;
1183 break;
1184 default:
1185 bsd_flock->l_type = -1;
1186 break;
1187 }
1188 bsd_flock->l_whence = linux_flock->l_whence;
1189 bsd_flock->l_start = (off_t)linux_flock->l_start;
1190 bsd_flock->l_len = (off_t)linux_flock->l_len;
1191 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1192 bsd_flock->l_sysid = 0;
1193 }
1194
1195 static void
bsd_to_linux_flock(struct flock * bsd_flock,struct l_flock * linux_flock)1196 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock)
1197 {
1198 switch (bsd_flock->l_type) {
1199 case F_RDLCK:
1200 linux_flock->l_type = LINUX_F_RDLCK;
1201 break;
1202 case F_WRLCK:
1203 linux_flock->l_type = LINUX_F_WRLCK;
1204 break;
1205 case F_UNLCK:
1206 linux_flock->l_type = LINUX_F_UNLCK;
1207 break;
1208 }
1209 linux_flock->l_whence = bsd_flock->l_whence;
1210 linux_flock->l_start = (l_off_t)bsd_flock->l_start;
1211 linux_flock->l_len = (l_off_t)bsd_flock->l_len;
1212 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1213 }
1214
1215 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1216 struct l_flock64 {
1217 l_short l_type;
1218 l_short l_whence;
1219 l_loff_t l_start;
1220 l_loff_t l_len;
1221 l_pid_t l_pid;
1222 }
1223 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1224 __packed
1225 #endif
1226 ;
1227
1228 static void
linux_to_bsd_flock64(struct l_flock64 * linux_flock,struct flock * bsd_flock)1229 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock)
1230 {
1231 switch (linux_flock->l_type) {
1232 case LINUX_F_RDLCK:
1233 bsd_flock->l_type = F_RDLCK;
1234 break;
1235 case LINUX_F_WRLCK:
1236 bsd_flock->l_type = F_WRLCK;
1237 break;
1238 case LINUX_F_UNLCK:
1239 bsd_flock->l_type = F_UNLCK;
1240 break;
1241 default:
1242 bsd_flock->l_type = -1;
1243 break;
1244 }
1245 bsd_flock->l_whence = linux_flock->l_whence;
1246 bsd_flock->l_start = (off_t)linux_flock->l_start;
1247 bsd_flock->l_len = (off_t)linux_flock->l_len;
1248 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1249 bsd_flock->l_sysid = 0;
1250 }
1251
1252 static void
bsd_to_linux_flock64(struct flock * bsd_flock,struct l_flock64 * linux_flock)1253 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock)
1254 {
1255 switch (bsd_flock->l_type) {
1256 case F_RDLCK:
1257 linux_flock->l_type = LINUX_F_RDLCK;
1258 break;
1259 case F_WRLCK:
1260 linux_flock->l_type = LINUX_F_WRLCK;
1261 break;
1262 case F_UNLCK:
1263 linux_flock->l_type = LINUX_F_UNLCK;
1264 break;
1265 }
1266 linux_flock->l_whence = bsd_flock->l_whence;
1267 linux_flock->l_start = (l_loff_t)bsd_flock->l_start;
1268 linux_flock->l_len = (l_loff_t)bsd_flock->l_len;
1269 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1270 }
1271 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1272
1273 static int
fcntl_common(struct thread * td,struct linux_fcntl_args * args)1274 fcntl_common(struct thread *td, struct linux_fcntl_args *args)
1275 {
1276 struct l_flock linux_flock;
1277 struct flock bsd_flock;
1278 cap_rights_t rights;
1279 struct file *fp;
1280 long arg;
1281 int error, result;
1282
1283 switch (args->cmd) {
1284 case LINUX_F_DUPFD:
1285 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg));
1286
1287 case LINUX_F_GETFD:
1288 return (kern_fcntl(td, args->fd, F_GETFD, 0));
1289
1290 case LINUX_F_SETFD:
1291 return (kern_fcntl(td, args->fd, F_SETFD, args->arg));
1292
1293 case LINUX_F_GETFL:
1294 error = kern_fcntl(td, args->fd, F_GETFL, 0);
1295 result = td->td_retval[0];
1296 td->td_retval[0] = 0;
1297 if (result & O_RDONLY)
1298 td->td_retval[0] |= LINUX_O_RDONLY;
1299 if (result & O_WRONLY)
1300 td->td_retval[0] |= LINUX_O_WRONLY;
1301 if (result & O_RDWR)
1302 td->td_retval[0] |= LINUX_O_RDWR;
1303 if (result & O_NDELAY)
1304 td->td_retval[0] |= LINUX_O_NONBLOCK;
1305 if (result & O_APPEND)
1306 td->td_retval[0] |= LINUX_O_APPEND;
1307 if (result & O_FSYNC)
1308 td->td_retval[0] |= LINUX_O_SYNC;
1309 if (result & O_ASYNC)
1310 td->td_retval[0] |= LINUX_FASYNC;
1311 #ifdef LINUX_O_NOFOLLOW
1312 if (result & O_NOFOLLOW)
1313 td->td_retval[0] |= LINUX_O_NOFOLLOW;
1314 #endif
1315 #ifdef LINUX_O_DIRECT
1316 if (result & O_DIRECT)
1317 td->td_retval[0] |= LINUX_O_DIRECT;
1318 #endif
1319 return (error);
1320
1321 case LINUX_F_SETFL:
1322 arg = 0;
1323 if (args->arg & LINUX_O_NDELAY)
1324 arg |= O_NONBLOCK;
1325 if (args->arg & LINUX_O_APPEND)
1326 arg |= O_APPEND;
1327 if (args->arg & LINUX_O_SYNC)
1328 arg |= O_FSYNC;
1329 if (args->arg & LINUX_FASYNC)
1330 arg |= O_ASYNC;
1331 #ifdef LINUX_O_NOFOLLOW
1332 if (args->arg & LINUX_O_NOFOLLOW)
1333 arg |= O_NOFOLLOW;
1334 #endif
1335 #ifdef LINUX_O_DIRECT
1336 if (args->arg & LINUX_O_DIRECT)
1337 arg |= O_DIRECT;
1338 #endif
1339 return (kern_fcntl(td, args->fd, F_SETFL, arg));
1340
1341 case LINUX_F_GETLK:
1342 error = copyin((void *)args->arg, &linux_flock,
1343 sizeof(linux_flock));
1344 if (error)
1345 return (error);
1346 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1347 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1348 if (error)
1349 return (error);
1350 bsd_to_linux_flock(&bsd_flock, &linux_flock);
1351 return (copyout(&linux_flock, (void *)args->arg,
1352 sizeof(linux_flock)));
1353
1354 case LINUX_F_SETLK:
1355 error = copyin((void *)args->arg, &linux_flock,
1356 sizeof(linux_flock));
1357 if (error)
1358 return (error);
1359 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1360 return (kern_fcntl(td, args->fd, F_SETLK,
1361 (intptr_t)&bsd_flock));
1362
1363 case LINUX_F_SETLKW:
1364 error = copyin((void *)args->arg, &linux_flock,
1365 sizeof(linux_flock));
1366 if (error)
1367 return (error);
1368 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1369 return (kern_fcntl(td, args->fd, F_SETLKW,
1370 (intptr_t)&bsd_flock));
1371
1372 case LINUX_F_GETOWN:
1373 return (kern_fcntl(td, args->fd, F_GETOWN, 0));
1374
1375 case LINUX_F_SETOWN:
1376 /*
1377 * XXX some Linux applications depend on F_SETOWN having no
1378 * significant effect for pipes (SIGIO is not delivered for
1379 * pipes under Linux-2.2.35 at least).
1380 */
1381 error = fget(td, args->fd,
1382 cap_rights_init(&rights, CAP_FCNTL), &fp);
1383 if (error)
1384 return (error);
1385 if (fp->f_type == DTYPE_PIPE) {
1386 fdrop(fp, td);
1387 return (EINVAL);
1388 }
1389 fdrop(fp, td);
1390
1391 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg));
1392
1393 case LINUX_F_DUPFD_CLOEXEC:
1394 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg));
1395 }
1396
1397 return (EINVAL);
1398 }
1399
1400 int
linux_fcntl(struct thread * td,struct linux_fcntl_args * args)1401 linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
1402 {
1403
1404 #ifdef DEBUG
1405 if (ldebug(fcntl))
1406 printf(ARGS(fcntl, "%d, %08x, *"), args->fd, args->cmd);
1407 #endif
1408
1409 return (fcntl_common(td, args));
1410 }
1411
1412 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1413 int
linux_fcntl64(struct thread * td,struct linux_fcntl64_args * args)1414 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args)
1415 {
1416 struct l_flock64 linux_flock;
1417 struct flock bsd_flock;
1418 struct linux_fcntl_args fcntl_args;
1419 int error;
1420
1421 #ifdef DEBUG
1422 if (ldebug(fcntl64))
1423 printf(ARGS(fcntl64, "%d, %08x, *"), args->fd, args->cmd);
1424 #endif
1425
1426 switch (args->cmd) {
1427 case LINUX_F_GETLK64:
1428 error = copyin((void *)args->arg, &linux_flock,
1429 sizeof(linux_flock));
1430 if (error)
1431 return (error);
1432 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1433 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1434 if (error)
1435 return (error);
1436 bsd_to_linux_flock64(&bsd_flock, &linux_flock);
1437 return (copyout(&linux_flock, (void *)args->arg,
1438 sizeof(linux_flock)));
1439
1440 case LINUX_F_SETLK64:
1441 error = copyin((void *)args->arg, &linux_flock,
1442 sizeof(linux_flock));
1443 if (error)
1444 return (error);
1445 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1446 return (kern_fcntl(td, args->fd, F_SETLK,
1447 (intptr_t)&bsd_flock));
1448
1449 case LINUX_F_SETLKW64:
1450 error = copyin((void *)args->arg, &linux_flock,
1451 sizeof(linux_flock));
1452 if (error)
1453 return (error);
1454 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1455 return (kern_fcntl(td, args->fd, F_SETLKW,
1456 (intptr_t)&bsd_flock));
1457 }
1458
1459 fcntl_args.fd = args->fd;
1460 fcntl_args.cmd = args->cmd;
1461 fcntl_args.arg = args->arg;
1462 return (fcntl_common(td, &fcntl_args));
1463 }
1464 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1465
1466 int
linux_chown(struct thread * td,struct linux_chown_args * args)1467 linux_chown(struct thread *td, struct linux_chown_args *args)
1468 {
1469 char *path;
1470 int error;
1471
1472 LCONVPATHEXIST(td, args->path, &path);
1473
1474 #ifdef DEBUG
1475 if (ldebug(chown))
1476 printf(ARGS(chown, "%s, %d, %d"), path, args->uid, args->gid);
1477 #endif
1478 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid,
1479 args->gid, 0);
1480 LFREEPATH(path);
1481 return (error);
1482 }
1483
1484 int
linux_fchownat(struct thread * td,struct linux_fchownat_args * args)1485 linux_fchownat(struct thread *td, struct linux_fchownat_args *args)
1486 {
1487 char *path;
1488 int error, dfd, flag;
1489
1490 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
1491 return (EINVAL);
1492
1493 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
1494 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
1495
1496 #ifdef DEBUG
1497 if (ldebug(fchownat))
1498 printf(ARGS(fchownat, "%s, %d, %d"), path, args->uid, args->gid);
1499 #endif
1500
1501 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 :
1502 AT_SYMLINK_NOFOLLOW;
1503 error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid,
1504 flag);
1505 LFREEPATH(path);
1506 return (error);
1507 }
1508
1509 int
linux_lchown(struct thread * td,struct linux_lchown_args * args)1510 linux_lchown(struct thread *td, struct linux_lchown_args *args)
1511 {
1512 char *path;
1513 int error;
1514
1515 LCONVPATHEXIST(td, args->path, &path);
1516
1517 #ifdef DEBUG
1518 if (ldebug(lchown))
1519 printf(ARGS(lchown, "%s, %d, %d"), path, args->uid, args->gid);
1520 #endif
1521 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid,
1522 args->gid, AT_SYMLINK_NOFOLLOW);
1523 LFREEPATH(path);
1524 return (error);
1525 }
1526
1527 static int
convert_fadvice(int advice)1528 convert_fadvice(int advice)
1529 {
1530 switch (advice) {
1531 case LINUX_POSIX_FADV_NORMAL:
1532 return (POSIX_FADV_NORMAL);
1533 case LINUX_POSIX_FADV_RANDOM:
1534 return (POSIX_FADV_RANDOM);
1535 case LINUX_POSIX_FADV_SEQUENTIAL:
1536 return (POSIX_FADV_SEQUENTIAL);
1537 case LINUX_POSIX_FADV_WILLNEED:
1538 return (POSIX_FADV_WILLNEED);
1539 case LINUX_POSIX_FADV_DONTNEED:
1540 return (POSIX_FADV_DONTNEED);
1541 case LINUX_POSIX_FADV_NOREUSE:
1542 return (POSIX_FADV_NOREUSE);
1543 default:
1544 return (-1);
1545 }
1546 }
1547
1548 int
linux_fadvise64(struct thread * td,struct linux_fadvise64_args * args)1549 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args)
1550 {
1551 int advice;
1552
1553 advice = convert_fadvice(args->advice);
1554 if (advice == -1)
1555 return (EINVAL);
1556 return (kern_posix_fadvise(td, args->fd, args->offset, args->len,
1557 advice));
1558 }
1559
1560 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1561 int
linux_fadvise64_64(struct thread * td,struct linux_fadvise64_64_args * args)1562 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args)
1563 {
1564 int advice;
1565
1566 advice = convert_fadvice(args->advice);
1567 if (advice == -1)
1568 return (EINVAL);
1569 return (kern_posix_fadvise(td, args->fd, args->offset, args->len,
1570 advice));
1571 }
1572 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1573
1574 int
linux_pipe(struct thread * td,struct linux_pipe_args * args)1575 linux_pipe(struct thread *td, struct linux_pipe_args *args)
1576 {
1577 int fildes[2];
1578 int error;
1579
1580 #ifdef DEBUG
1581 if (ldebug(pipe))
1582 printf(ARGS(pipe, "*"));
1583 #endif
1584
1585 error = kern_pipe(td, fildes, 0, NULL, NULL);
1586 if (error)
1587 return (error);
1588
1589 /* XXX: Close descriptors on error. */
1590 return (copyout(fildes, args->pipefds, sizeof(fildes)));
1591 }
1592
1593 int
linux_pipe2(struct thread * td,struct linux_pipe2_args * args)1594 linux_pipe2(struct thread *td, struct linux_pipe2_args *args)
1595 {
1596 int fildes[2];
1597 int error, flags;
1598
1599 #ifdef DEBUG
1600 if (ldebug(pipe2))
1601 printf(ARGS(pipe2, "*, %d"), args->flags);
1602 #endif
1603
1604 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0)
1605 return (EINVAL);
1606
1607 flags = 0;
1608 if ((args->flags & LINUX_O_NONBLOCK) != 0)
1609 flags |= O_NONBLOCK;
1610 if ((args->flags & LINUX_O_CLOEXEC) != 0)
1611 flags |= O_CLOEXEC;
1612 error = kern_pipe(td, fildes, flags, NULL, NULL);
1613 if (error)
1614 return (error);
1615
1616 /* XXX: Close descriptors on error. */
1617 return (copyout(fildes, args->pipefds, sizeof(fildes)));
1618 }
1619
1620 int
linux_dup3(struct thread * td,struct linux_dup3_args * args)1621 linux_dup3(struct thread *td, struct linux_dup3_args *args)
1622 {
1623 int cmd;
1624 intptr_t newfd;
1625
1626 if (args->oldfd == args->newfd)
1627 return (EINVAL);
1628 if ((args->flags & ~LINUX_O_CLOEXEC) != 0)
1629 return (EINVAL);
1630 if (args->flags & LINUX_O_CLOEXEC)
1631 cmd = F_DUP2FD_CLOEXEC;
1632 else
1633 cmd = F_DUP2FD;
1634
1635 newfd = args->newfd;
1636 return (kern_fcntl(td, args->oldfd, cmd, newfd));
1637 }
1638
1639 int
linux_fallocate(struct thread * td,struct linux_fallocate_args * args)1640 linux_fallocate(struct thread *td, struct linux_fallocate_args *args)
1641 {
1642
1643 /*
1644 * We emulate only posix_fallocate system call for which
1645 * mode should be 0.
1646 */
1647 if (args->mode != 0)
1648 return (ENOSYS);
1649
1650 return (kern_posix_fallocate(td, args->fd, args->offset,
1651 args->len));
1652 }
1653