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: src/sys/compat/linux/linux_file.c,v 1.115 2008/09/09 16:00:17 rdivacky Exp $");
31
32 #include "opt_compat.h"
33 #include "opt_mac.h"
34
35 #include <sys/param.h>
36 #include <sys/systm.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_util.h>
70 #include <compat/linux/linux_file.h>
71
72 int
73 linux_creat(struct thread *td, struct linux_creat_args *args)
74 {
75 char *path;
76 int error;
77
78 LCONVPATHEXIST(td, args->path, &path);
79
80 #ifdef DEBUG
81 if (ldebug(creat))
82 printf(ARGS(creat, "%s, %d"), path, args->mode);
83 #endif
84 error = kern_open(td, path, UIO_SYSSPACE, O_WRONLY | O_CREAT | O_TRUNC,
85 args->mode);
86 LFREEPATH(path);
87 return (error);
88 }
89
90
91 static int
92 linux_common_open(struct thread *td, int dirfd, char *path, int l_flags, int mode)
93 {
94 struct proc *p = td->td_proc;
95 struct file *fp;
96 int fd;
97 int bsd_flags, error;
98
99 bsd_flags = 0;
100 switch (l_flags & LINUX_O_ACCMODE) {
101 case LINUX_O_WRONLY:
102 bsd_flags |= O_WRONLY;
103 break;
104 case LINUX_O_RDWR:
105 bsd_flags |= O_RDWR;
106 break;
107 default:
108 bsd_flags |= O_RDONLY;
109 }
110 if (l_flags & LINUX_O_NDELAY)
111 bsd_flags |= O_NONBLOCK;
112 if (l_flags & LINUX_O_APPEND)
113 bsd_flags |= O_APPEND;
114 if (l_flags & LINUX_O_SYNC)
115 bsd_flags |= O_FSYNC;
116 if (l_flags & LINUX_O_NONBLOCK)
117 bsd_flags |= O_NONBLOCK;
118 if (l_flags & LINUX_FASYNC)
119 bsd_flags |= O_ASYNC;
120 if (l_flags & LINUX_O_CREAT)
121 bsd_flags |= O_CREAT;
122 if (l_flags & LINUX_O_TRUNC)
123 bsd_flags |= O_TRUNC;
124 if (l_flags & LINUX_O_EXCL)
125 bsd_flags |= O_EXCL;
126 if (l_flags & LINUX_O_NOCTTY)
127 bsd_flags |= O_NOCTTY;
128 if (l_flags & LINUX_O_DIRECT)
129 bsd_flags |= O_DIRECT;
130 if (l_flags & LINUX_O_NOFOLLOW)
131 bsd_flags |= O_NOFOLLOW;
132 /* XXX LINUX_O_NOATIME: unable to be easily implemented. */
133
134 error = kern_openat(td, dirfd, path, UIO_SYSSPACE, bsd_flags, mode);
135
136 if (!error) {
137 fd = td->td_retval[0];
138 /*
139 * XXX In between kern_open() and fget(), another process
140 * having the same filedesc could use that fd without
141 * checking below.
142 */
143 error = fget(td, fd, &fp);
144 if (!error) {
145 sx_slock(&proctree_lock);
146 PROC_LOCK(p);
147 if (!(bsd_flags & O_NOCTTY) &&
148 SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
149 PROC_UNLOCK(p);
150 sx_unlock(&proctree_lock);
151 if (fp->f_type == DTYPE_VNODE)
152 (void) fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0,
153 td->td_ucred, td);
154 } else {
155 PROC_UNLOCK(p);
156 sx_sunlock(&proctree_lock);
157 }
158 if (l_flags & LINUX_O_DIRECTORY) {
159 if (fp->f_type != DTYPE_VNODE ||
160 fp->f_vnode->v_type != VDIR) {
161 error = ENOTDIR;
162 }
163 }
164 fdrop(fp, td);
165 /*
166 * XXX as above, fdrop()/kern_close() pair is racy.
167 */
168 if (error)
169 kern_close(td, fd);
170 }
171 }
172
173 #ifdef DEBUG
174 if (ldebug(open))
175 printf(LMSG("open returns error %d"), error);
176 #endif
177 LFREEPATH(path);
178 return (error);
179 }
180
181 int
182 linux_openat(struct thread *td, struct linux_openat_args *args)
183 {
184 char *path;
185 int dfd;
186
187 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
188 if (args->flags & LINUX_O_CREAT)
189 LCONVPATH_AT(td, args->filename, &path, 1, dfd);
190 else
191 LCONVPATH_AT(td, args->filename, &path, 0, dfd);
192 #ifdef DEBUG
193 if (ldebug(openat))
194 printf(ARGS(openat, "%i, %s, 0x%x, 0x%x"), args->dfd,
195 path, args->flags, args->mode);
196 #endif
197 return (linux_common_open(td, dfd, path, args->flags, args->mode));
198 }
199
200 int
201 linux_open(struct thread *td, struct linux_open_args *args)
202 {
203 char *path;
204
205 if (args->flags & LINUX_O_CREAT)
206 LCONVPATHCREAT(td, args->path, &path);
207 else
208 LCONVPATHEXIST(td, args->path, &path);
209
210 #ifdef DEBUG
211 if (ldebug(open))
212 printf(ARGS(open, "%s, 0x%x, 0x%x"),
213 path, args->flags, args->mode);
214 #endif
215
216 return (linux_common_open(td, AT_FDCWD, path, args->flags, args->mode));
217 }
218
219 int
220 linux_lseek(struct thread *td, struct linux_lseek_args *args)
221 {
222
223 struct lseek_args /* {
224 int fd;
225 int pad;
226 off_t offset;
227 int whence;
228 } */ tmp_args;
229 int error;
230
231 #ifdef DEBUG
232 if (ldebug(lseek))
233 printf(ARGS(lseek, "%d, %ld, %d"),
234 args->fdes, (long)args->off, args->whence);
235 #endif
236 tmp_args.fd = args->fdes;
237 tmp_args.offset = (off_t)args->off;
238 tmp_args.whence = args->whence;
239 error = lseek(td, &tmp_args);
240 return error;
241 }
242
243 int
244 linux_llseek(struct thread *td, struct linux_llseek_args *args)
245 {
246 struct lseek_args bsd_args;
247 int error;
248 off_t off;
249
250 #ifdef DEBUG
251 if (ldebug(llseek))
252 printf(ARGS(llseek, "%d, %d:%d, %d"),
253 args->fd, args->ohigh, args->olow, args->whence);
254 #endif
255 off = (args->olow) | (((off_t) args->ohigh) << 32);
256
257 bsd_args.fd = args->fd;
258 bsd_args.offset = off;
259 bsd_args.whence = args->whence;
260
261 if ((error = lseek(td, &bsd_args)))
262 return error;
263
264 if ((error = copyout(td->td_retval, args->res, sizeof (off_t))))
265 return error;
266
267 td->td_retval[0] = 0;
268 return 0;
269 }
270
271 int
272 linux_readdir(struct thread *td, struct linux_readdir_args *args)
273 {
274 struct linux_getdents_args lda;
275
276 lda.fd = args->fd;
277 lda.dent = args->dent;
278 lda.count = 1;
279 return linux_getdents(td, &lda);
280 }
281
282 /*
283 * Note that linux_getdents(2) and linux_getdents64(2) have the same
284 * arguments. They only differ in the definition of struct dirent they
285 * operate on. We use this to common the code, with the exception of
286 * accessing struct dirent. Note that linux_readdir(2) is implemented
287 * by means of linux_getdents(2). In this case we never operate on
288 * struct dirent64 and thus don't need to handle it...
289 */
290
291 struct l_dirent {
292 l_ulong d_ino;
293 l_off_t d_off;
294 l_ushort d_reclen;
295 char d_name[LINUX_NAME_MAX + 1];
296 };
297
298 struct l_dirent64 {
299 uint64_t d_ino;
300 int64_t d_off;
301 l_ushort d_reclen;
302 u_char d_type;
303 char d_name[LINUX_NAME_MAX + 1];
304 };
305
306 /*
307 * Linux uses the last byte in the dirent buffer to store d_type,
308 * at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes.
309 */
310 #define LINUX_RECLEN(namlen) \
311 roundup((offsetof(struct l_dirent, d_name) + (namlen) + 2), \
312 sizeof(l_ulong))
313
314 #define LINUX_RECLEN64(namlen) \
315 roundup((offsetof(struct l_dirent64, d_name) + (namlen) + 1), \
316 sizeof(uint64_t))
317
318 #define LINUX_MAXRECLEN max(LINUX_RECLEN(LINUX_NAME_MAX), \
319 LINUX_RECLEN64(LINUX_NAME_MAX))
320 #define LINUX_DIRBLKSIZ 512
321
322 static int
323 getdents_common(struct thread *td, struct linux_getdents64_args *args,
324 int is64bit)
325 {
326 struct dirent *bdp;
327 struct vnode *vp;
328 caddr_t inp, buf; /* BSD-format */
329 int len, reclen; /* BSD-format */
330 caddr_t outp; /* Linux-format */
331 int resid, linuxreclen=0; /* Linux-format */
332 caddr_t lbuf; /* Linux-format */
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, vfslocked;
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 if ((error = getvnode(td->td_proc->p_fd, args->fd, &fp)) != 0)
354 return (error);
355
356 if ((fp->f_flag & FREAD) == 0) {
357 fdrop(fp, td);
358 return (EBADF);
359 }
360
361 vp = fp->f_vnode;
362 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
363 if (vp->v_type != VDIR) {
364 VFS_UNLOCK_GIANT(vfslocked);
365 fdrop(fp, td);
366 return (EINVAL);
367 }
368
369 off = fp->f_offset;
370
371 buflen = max(LINUX_DIRBLKSIZ, nbytes);
372 buflen = min(buflen, MAXBSIZE);
373 buf = malloc(buflen, M_TEMP, M_WAITOK);
374 lbuf = malloc(LINUX_MAXRECLEN, M_TEMP, M_WAITOK | M_ZERO);
375 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
376
377 again:
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 if (cookies) {
389 free(cookies, M_TEMP);
390 cookies = NULL;
391 }
392
393 #ifdef MAC
394 /*
395 * Do directory search MAC check using non-cached credentials.
396 */
397 if ((error = mac_vnode_check_readdir(td->td_ucred, vp)))
398 goto out;
399 #endif /* MAC */
400 if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies,
401 &cookies)))
402 goto out;
403
404 inp = buf;
405 outp = (caddr_t)args->dirent;
406 resid = nbytes;
407 if ((len = buflen - auio.uio_resid) <= 0)
408 goto eof;
409
410 cookiep = cookies;
411
412 if (cookies) {
413 /*
414 * When using cookies, the vfs has the option of reading from
415 * a different offset than that supplied (UFS truncates the
416 * offset to a block boundary to make sure that it never reads
417 * partway through a directory entry, even if the directory
418 * has been compacted).
419 */
420 while (len > 0 && ncookies > 0 && *cookiep <= off) {
421 bdp = (struct dirent *) inp;
422 len -= bdp->d_reclen;
423 inp += bdp->d_reclen;
424 cookiep++;
425 ncookies--;
426 }
427 }
428
429 while (len > 0) {
430 if (cookiep && ncookies == 0)
431 break;
432 bdp = (struct dirent *) inp;
433 reclen = bdp->d_reclen;
434 if (reclen & 3) {
435 error = EFAULT;
436 goto out;
437 }
438
439 if (bdp->d_fileno == 0) {
440 inp += reclen;
441 if (cookiep) {
442 off = *cookiep++;
443 ncookies--;
444 } else
445 off += reclen;
446
447 len -= reclen;
448 continue;
449 }
450
451 linuxreclen = (is64bit)
452 ? LINUX_RECLEN64(bdp->d_namlen)
453 : LINUX_RECLEN(bdp->d_namlen);
454
455 if (reclen > len || resid < linuxreclen) {
456 outp++;
457 break;
458 }
459
460 if (justone) {
461 /* readdir(2) case. */
462 linux_dirent = (struct l_dirent*)lbuf;
463 linux_dirent->d_ino = bdp->d_fileno;
464 linux_dirent->d_off = (l_off_t)linuxreclen;
465 linux_dirent->d_reclen = (l_ushort)bdp->d_namlen;
466 strlcpy(linux_dirent->d_name, bdp->d_name,
467 linuxreclen - offsetof(struct l_dirent, d_name));
468 error = copyout(linux_dirent, outp, linuxreclen);
469 }
470 if (is64bit) {
471 linux_dirent64 = (struct l_dirent64*)lbuf;
472 linux_dirent64->d_ino = bdp->d_fileno;
473 linux_dirent64->d_off = (cookiep)
474 ? (l_off_t)*cookiep
475 : (l_off_t)(off + reclen);
476 linux_dirent64->d_reclen = (l_ushort)linuxreclen;
477 linux_dirent64->d_type = bdp->d_type;
478 strlcpy(linux_dirent64->d_name, bdp->d_name,
479 linuxreclen - offsetof(struct l_dirent64, d_name));
480 error = copyout(linux_dirent64, outp, linuxreclen);
481 } else if (!justone) {
482 linux_dirent = (struct l_dirent*)lbuf;
483 linux_dirent->d_ino = bdp->d_fileno;
484 linux_dirent->d_off = (cookiep)
485 ? (l_off_t)*cookiep
486 : (l_off_t)(off + reclen);
487 linux_dirent->d_reclen = (l_ushort)linuxreclen;
488 /*
489 * Copy d_type to last byte of l_dirent buffer
490 */
491 lbuf[linuxreclen-1] = bdp->d_type;
492 strlcpy(linux_dirent->d_name, bdp->d_name,
493 linuxreclen - offsetof(struct l_dirent, d_name)-1);
494 error = copyout(linux_dirent, outp, linuxreclen);
495 }
496
497 if (error)
498 goto out;
499
500 inp += reclen;
501 if (cookiep) {
502 off = *cookiep++;
503 ncookies--;
504 } else
505 off += reclen;
506
507 outp += linuxreclen;
508 resid -= linuxreclen;
509 len -= reclen;
510 if (justone)
511 break;
512 }
513
514 if (outp == (caddr_t)args->dirent)
515 goto again;
516
517 fp->f_offset = off;
518 if (justone)
519 nbytes = resid + linuxreclen;
520
521 eof:
522 td->td_retval[0] = nbytes - resid;
523
524 out:
525 if (cookies)
526 free(cookies, M_TEMP);
527
528 VOP_UNLOCK(vp, 0);
529 VFS_UNLOCK_GIANT(vfslocked);
530 fdrop(fp, td);
531 free(buf, M_TEMP);
532 free(lbuf, M_TEMP);
533 return (error);
534 }
535
536 int
537 linux_getdents(struct thread *td, struct linux_getdents_args *args)
538 {
539
540 #ifdef DEBUG
541 if (ldebug(getdents))
542 printf(ARGS(getdents, "%d, *, %d"), args->fd, args->count);
543 #endif
544
545 return (getdents_common(td, (struct linux_getdents64_args*)args, 0));
546 }
547
548 int
549 linux_getdents64(struct thread *td, struct linux_getdents64_args *args)
550 {
551
552 #ifdef DEBUG
553 if (ldebug(getdents64))
554 printf(ARGS(getdents64, "%d, *, %d"), args->fd, args->count);
555 #endif
556
557 return (getdents_common(td, args, 1));
558 }
559
560 /*
561 * These exist mainly for hooks for doing /compat/linux translation.
562 */
563
564 int
565 linux_access(struct thread *td, struct linux_access_args *args)
566 {
567 char *path;
568 int error;
569
570 /* linux convention */
571 if (args->flags & ~(F_OK | X_OK | W_OK | R_OK))
572 return (EINVAL);
573
574 LCONVPATHEXIST(td, args->path, &path);
575
576 #ifdef DEBUG
577 if (ldebug(access))
578 printf(ARGS(access, "%s, %d"), path, args->flags);
579 #endif
580 error = kern_access(td, path, UIO_SYSSPACE, args->flags);
581 LFREEPATH(path);
582
583 return (error);
584 }
585
586 int
587 linux_faccessat(struct thread *td, struct linux_faccessat_args *args)
588 {
589 char *path;
590 int error, dfd;
591
592 /* linux convention */
593 if (args->mode & ~(F_OK | X_OK | W_OK | R_OK))
594 return (EINVAL);
595
596 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
597 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
598
599 #ifdef DEBUG
600 if (ldebug(access))
601 printf(ARGS(access, "%s, %d"), path, args->mode);
602 #endif
603
604 error = kern_accessat(td, dfd, path, UIO_SYSSPACE, 0 /* XXX */,
605 args->mode);
606 LFREEPATH(path);
607
608 return (error);
609 }
610
611 int
612 linux_unlink(struct thread *td, struct linux_unlink_args *args)
613 {
614 char *path;
615 int error;
616 struct stat st;
617
618 LCONVPATHEXIST(td, args->path, &path);
619
620 #ifdef DEBUG
621 if (ldebug(unlink))
622 printf(ARGS(unlink, "%s"), path);
623 #endif
624
625 error = kern_unlink(td, path, UIO_SYSSPACE);
626 if (error == EPERM)
627 /* Introduce POSIX noncompliant behaviour of Linux */
628 if (kern_stat(td, path, UIO_SYSSPACE, &st) == 0)
629 if (S_ISDIR(st.st_mode))
630 error = EISDIR;
631 LFREEPATH(path);
632 return (error);
633 }
634
635 int
636 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args)
637 {
638 char *path;
639 int error, dfd;
640 struct stat st;
641
642 if (args->flag & ~LINUX_AT_REMOVEDIR)
643 return (EINVAL);
644
645 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
646 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
647
648 #ifdef DEBUG
649 if (ldebug(unlinkat))
650 printf(ARGS(unlinkat, "%s"), path);
651 #endif
652
653 if (args->flag & LINUX_AT_REMOVEDIR)
654 error = kern_rmdirat(td, dfd, path, UIO_SYSSPACE);
655 else
656 error = kern_unlinkat(td, dfd, path, UIO_SYSSPACE);
657 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) {
658 /* Introduce POSIX noncompliant behaviour of Linux */
659 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path,
660 UIO_SYSSPACE, &st) == 0 && S_ISDIR(st.st_mode))
661 error = EISDIR;
662 }
663 LFREEPATH(path);
664 return (error);
665 }
666 int
667 linux_chdir(struct thread *td, struct linux_chdir_args *args)
668 {
669 char *path;
670 int error;
671
672 LCONVPATHEXIST(td, args->path, &path);
673
674 #ifdef DEBUG
675 if (ldebug(chdir))
676 printf(ARGS(chdir, "%s"), path);
677 #endif
678 error = kern_chdir(td, path, UIO_SYSSPACE);
679 LFREEPATH(path);
680 return (error);
681 }
682
683 int
684 linux_chmod(struct thread *td, struct linux_chmod_args *args)
685 {
686 char *path;
687 int error;
688
689 LCONVPATHEXIST(td, args->path, &path);
690
691 #ifdef DEBUG
692 if (ldebug(chmod))
693 printf(ARGS(chmod, "%s, %d"), path, args->mode);
694 #endif
695 error = kern_chmod(td, path, UIO_SYSSPACE, args->mode);
696 LFREEPATH(path);
697 return (error);
698 }
699
700 int
701 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args)
702 {
703 char *path;
704 int error, dfd;
705
706 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
707 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
708
709 #ifdef DEBUG
710 if (ldebug(fchmodat))
711 printf(ARGS(fchmodat, "%s, %d"), path, args->mode);
712 #endif
713
714 error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0);
715 LFREEPATH(path);
716 return (error);
717 }
718
719 int
720 linux_mkdir(struct thread *td, struct linux_mkdir_args *args)
721 {
722 char *path;
723 int error;
724
725 LCONVPATHCREAT(td, args->path, &path);
726
727 #ifdef DEBUG
728 if (ldebug(mkdir))
729 printf(ARGS(mkdir, "%s, %d"), path, args->mode);
730 #endif
731 error = kern_mkdir(td, path, UIO_SYSSPACE, args->mode);
732 LFREEPATH(path);
733 return (error);
734 }
735
736 int
737 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args)
738 {
739 char *path;
740 int error, dfd;
741
742 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
743 LCONVPATHCREAT_AT(td, args->pathname, &path, dfd);
744
745 #ifdef DEBUG
746 if (ldebug(mkdirat))
747 printf(ARGS(mkdirat, "%s, %d"), path, args->mode);
748 #endif
749 error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode);
750 LFREEPATH(path);
751 return (error);
752 }
753
754 int
755 linux_rmdir(struct thread *td, struct linux_rmdir_args *args)
756 {
757 char *path;
758 int error;
759
760 LCONVPATHEXIST(td, args->path, &path);
761
762 #ifdef DEBUG
763 if (ldebug(rmdir))
764 printf(ARGS(rmdir, "%s"), path);
765 #endif
766 error = kern_rmdir(td, path, UIO_SYSSPACE);
767 LFREEPATH(path);
768 return (error);
769 }
770
771 int
772 linux_rename(struct thread *td, struct linux_rename_args *args)
773 {
774 char *from, *to;
775 int error;
776
777 LCONVPATHEXIST(td, args->from, &from);
778 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
779 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
780 if (to == NULL) {
781 LFREEPATH(from);
782 return (error);
783 }
784
785 #ifdef DEBUG
786 if (ldebug(rename))
787 printf(ARGS(rename, "%s, %s"), from, to);
788 #endif
789 error = kern_rename(td, from, to, UIO_SYSSPACE);
790 LFREEPATH(from);
791 LFREEPATH(to);
792 return (error);
793 }
794
795 int
796 linux_renameat(struct thread *td, struct linux_renameat_args *args)
797 {
798 char *from, *to;
799 int error, olddfd, newdfd;
800
801 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
802 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
803 LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd);
804 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
805 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
806 if (to == NULL) {
807 LFREEPATH(from);
808 return (error);
809 }
810
811 #ifdef DEBUG
812 if (ldebug(renameat))
813 printf(ARGS(renameat, "%s, %s"), from, to);
814 #endif
815 error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE);
816 LFREEPATH(from);
817 LFREEPATH(to);
818 return (error);
819 }
820
821 int
822 linux_symlink(struct thread *td, struct linux_symlink_args *args)
823 {
824 char *path, *to;
825 int error;
826
827 LCONVPATHEXIST(td, args->path, &path);
828 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
829 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
830 if (to == NULL) {
831 LFREEPATH(path);
832 return (error);
833 }
834
835 #ifdef DEBUG
836 if (ldebug(symlink))
837 printf(ARGS(symlink, "%s, %s"), path, to);
838 #endif
839 error = kern_symlink(td, path, to, UIO_SYSSPACE);
840 LFREEPATH(path);
841 LFREEPATH(to);
842 return (error);
843 }
844
845 int
846 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args)
847 {
848 char *path, *to;
849 int error, dfd;
850
851 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
852 LCONVPATHEXIST_AT(td, args->oldname, &path, dfd);
853 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
854 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd);
855 if (to == NULL) {
856 LFREEPATH(path);
857 return (error);
858 }
859
860 #ifdef DEBUG
861 if (ldebug(symlinkat))
862 printf(ARGS(symlinkat, "%s, %s"), path, to);
863 #endif
864
865 error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE);
866 LFREEPATH(path);
867 LFREEPATH(to);
868 return (error);
869 }
870
871 int
872 linux_readlink(struct thread *td, struct linux_readlink_args *args)
873 {
874 char *name;
875 int error;
876
877 LCONVPATHEXIST(td, args->name, &name);
878
879 #ifdef DEBUG
880 if (ldebug(readlink))
881 printf(ARGS(readlink, "%s, %p, %d"), name, (void *)args->buf,
882 args->count);
883 #endif
884 error = kern_readlink(td, name, UIO_SYSSPACE, args->buf, UIO_USERSPACE,
885 args->count);
886 LFREEPATH(name);
887 return (error);
888 }
889
890 int
891 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args)
892 {
893 char *name;
894 int error, dfd;
895
896 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
897 LCONVPATHEXIST_AT(td, args->path, &name, dfd);
898
899 #ifdef DEBUG
900 if (ldebug(readlinkat))
901 printf(ARGS(readlinkat, "%s, %p, %d"), name, (void *)args->buf,
902 args->bufsiz);
903 #endif
904
905 error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf,
906 UIO_USERSPACE, args->bufsiz);
907 LFREEPATH(name);
908 return (error);
909 }
910
911 int
912 linux_truncate(struct thread *td, struct linux_truncate_args *args)
913 {
914 char *path;
915 int error;
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