linux_file.c revision 49676 
1/*-
2 * Copyright (c) 1994-1995 S�ren 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 withough 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 *  $Id: linux_file.c,v 1.28 1999/08/12 19:53:32 marcel Exp $
29 */
30
31#include "opt_compat.h"
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/sysproto.h>
36#include <sys/fcntl.h>
37#include <sys/file.h>
38#include <sys/filedesc.h>
39#include <sys/lock.h>
40#include <sys/proc.h>
41#include <sys/vnode.h>
42#include <sys/malloc.h>
43#include <sys/dirent.h>
44#include <sys/conf.h>
45#include <sys/tty.h>
46
47#include <i386/linux/linux.h>
48#include <i386/linux/linux_proto.h>
49#include <i386/linux/linux_util.h>
50
51int
52linux_creat(struct proc *p, struct linux_creat_args *args)
53{
54    struct open_args /* {
55	char *path;
56	int flags;
57	int mode;
58    } */ bsd_open_args;
59    caddr_t sg;
60
61    sg = stackgap_init();
62    CHECKALTCREAT(p, &sg, args->path);
63
64#ifdef DEBUG
65    printf("Linux-emul(%d): creat(%s, %d)\n",
66	   p->p_pid, args->path, args->mode);
67#endif
68    bsd_open_args.path = args->path;
69    bsd_open_args.mode = args->mode;
70    bsd_open_args.flags = O_WRONLY | O_CREAT | O_TRUNC;
71    return open(p, &bsd_open_args);
72}
73
74int
75linux_open(struct proc *p, struct linux_open_args *args)
76{
77    struct open_args /* {
78	char *path;
79	int flags;
80	int mode;
81    } */ bsd_open_args;
82    int error;
83    caddr_t sg;
84
85    sg = stackgap_init();
86
87    if (args->flags & LINUX_O_CREAT)
88	CHECKALTCREAT(p, &sg, args->path);
89    else
90	CHECKALTEXIST(p, &sg, args->path);
91
92#ifdef DEBUG
93    printf("Linux-emul(%d): open(%s, 0x%x, 0x%x)\n",
94	   p->p_pid, args->path, args->flags, args->mode);
95#endif
96    bsd_open_args.flags = 0;
97    if (args->flags & LINUX_O_RDONLY)
98	bsd_open_args.flags |= O_RDONLY;
99    if (args->flags & LINUX_O_WRONLY)
100	bsd_open_args.flags |= O_WRONLY;
101    if (args->flags & LINUX_O_RDWR)
102	bsd_open_args.flags |= O_RDWR;
103    if (args->flags & LINUX_O_NDELAY)
104	bsd_open_args.flags |= O_NONBLOCK;
105    if (args->flags & LINUX_O_APPEND)
106	bsd_open_args.flags |= O_APPEND;
107    if (args->flags & LINUX_O_SYNC)
108	bsd_open_args.flags |= O_FSYNC;
109    if (args->flags & LINUX_O_NONBLOCK)
110	bsd_open_args.flags |= O_NONBLOCK;
111    if (args->flags & LINUX_FASYNC)
112	bsd_open_args.flags |= O_ASYNC;
113    if (args->flags & LINUX_O_CREAT)
114	bsd_open_args.flags |= O_CREAT;
115    if (args->flags & LINUX_O_TRUNC)
116	bsd_open_args.flags |= O_TRUNC;
117    if (args->flags & LINUX_O_EXCL)
118	bsd_open_args.flags |= O_EXCL;
119    if (args->flags & LINUX_O_NOCTTY)
120	bsd_open_args.flags |= O_NOCTTY;
121    bsd_open_args.path = args->path;
122    bsd_open_args.mode = args->mode;
123
124    error = open(p, &bsd_open_args);
125    if (!error && !(bsd_open_args.flags & O_NOCTTY) &&
126	SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
127	struct filedesc *fdp = p->p_fd;
128	struct file *fp = fdp->fd_ofiles[p->p_retval[0]];
129
130	if (fp->f_type == DTYPE_VNODE)
131	    (fp->f_ops->fo_ioctl)(fp, TIOCSCTTY, (caddr_t) 0, p);
132    }
133#ifdef DEBUG
134    printf("Linux-emul(%d): open returns error %d\n",
135	   p->p_pid, error);
136#endif
137    return error;
138}
139
140struct linux_flock {
141    short l_type;
142    short l_whence;
143    linux_off_t l_start;
144    linux_off_t l_len;
145    linux_pid_t l_pid;
146};
147
148static void
149linux_to_bsd_flock(struct linux_flock *linux_flock, struct flock *bsd_flock)
150{
151    switch (linux_flock->l_type) {
152    case LINUX_F_RDLCK:
153	bsd_flock->l_type = F_RDLCK;
154	break;
155    case LINUX_F_WRLCK:
156	bsd_flock->l_type = F_WRLCK;
157	break;
158    case LINUX_F_UNLCK:
159	bsd_flock->l_type = F_UNLCK;
160	break;
161    default:
162        bsd_flock->l_type = -1;
163        break;
164    }
165    bsd_flock->l_whence = linux_flock->l_whence;
166    bsd_flock->l_start = (off_t)linux_flock->l_start;
167    bsd_flock->l_len = (off_t)linux_flock->l_len;
168    bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
169}
170
171static void
172bsd_to_linux_flock(struct flock *bsd_flock, struct linux_flock *linux_flock)
173{
174    switch (bsd_flock->l_type) {
175    case F_RDLCK:
176	linux_flock->l_type = LINUX_F_RDLCK;
177	break;
178    case F_WRLCK:
179	linux_flock->l_type = LINUX_F_WRLCK;
180	break;
181    case F_UNLCK:
182	linux_flock->l_type = LINUX_F_UNLCK;
183	break;
184    }
185    linux_flock->l_whence = bsd_flock->l_whence;
186    linux_flock->l_start = (linux_off_t)bsd_flock->l_start;
187    linux_flock->l_len = (linux_off_t)bsd_flock->l_len;
188    linux_flock->l_pid = (linux_pid_t)bsd_flock->l_pid;
189}
190
191int
192linux_fcntl(struct proc *p, struct linux_fcntl_args *args)
193{
194    int error, result;
195    struct fcntl_args /* {
196	int fd;
197	int cmd;
198	int arg;
199    } */ fcntl_args;
200    struct linux_flock linux_flock;
201    struct flock *bsd_flock;
202    struct filedesc *fdp;
203    struct file *fp;
204    struct vnode *vp;
205    long pgid;
206    struct pgrp *pgrp;
207    struct tty *tp, *(*d_tty) __P((dev_t));
208    caddr_t sg;
209    dev_t dev;
210
211    sg = stackgap_init();
212    bsd_flock = (struct flock *)stackgap_alloc(&sg, sizeof(struct flock));
213    d_tty = NULL;
214
215#ifdef DEBUG
216    printf("Linux-emul(%d): fcntl(%d, %08x, *)\n",
217	   p->p_pid, args->fd, args->cmd);
218#endif
219    fcntl_args.fd = args->fd;
220    fcntl_args.arg = 0;
221
222    switch (args->cmd) {
223    case LINUX_F_DUPFD:
224	fcntl_args.cmd = F_DUPFD;
225	return fcntl(p, &fcntl_args);
226
227    case LINUX_F_GETFD:
228	fcntl_args.cmd = F_GETFD;
229	return fcntl(p, &fcntl_args);
230
231    case LINUX_F_SETFD:
232	fcntl_args.cmd = F_SETFD;
233	return fcntl(p, &fcntl_args);
234
235    case LINUX_F_GETFL:
236	fcntl_args.cmd = F_GETFL;
237	error = fcntl(p, &fcntl_args);
238	result = p->p_retval[0];
239	p->p_retval[0] = 0;
240	if (result & O_RDONLY) p->p_retval[0] |= LINUX_O_RDONLY;
241	if (result & O_WRONLY) p->p_retval[0] |= LINUX_O_WRONLY;
242	if (result & O_RDWR) p->p_retval[0] |= LINUX_O_RDWR;
243	if (result & O_NDELAY) p->p_retval[0] |= LINUX_O_NONBLOCK;
244	if (result & O_APPEND) p->p_retval[0] |= LINUX_O_APPEND;
245	if (result & O_FSYNC) p->p_retval[0] |= LINUX_O_SYNC;
246	if (result & O_ASYNC) p->p_retval[0] |= LINUX_FASYNC;
247	return error;
248
249    case LINUX_F_SETFL:
250	if (args->arg & LINUX_O_NDELAY) fcntl_args.arg |= O_NONBLOCK;
251	if (args->arg & LINUX_O_APPEND) fcntl_args.arg |= O_APPEND;
252	if (args->arg & LINUX_O_SYNC) fcntl_args.arg |= O_FSYNC;
253	if (args->arg & LINUX_FASYNC) fcntl_args.arg |= O_ASYNC;
254	fcntl_args.cmd = F_SETFL;
255	return fcntl(p, &fcntl_args);
256
257    case LINUX_F_GETLK:
258	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
259		   	    sizeof(struct linux_flock))))
260	    return error;
261	linux_to_bsd_flock(&linux_flock, bsd_flock);
262	fcntl_args.cmd = F_GETLK;
263	fcntl_args.arg = (int)bsd_flock;
264	error = fcntl(p, &fcntl_args);
265	if (error)
266	    return error;
267	bsd_to_linux_flock(bsd_flock, &linux_flock);
268	return copyout((caddr_t)&linux_flock, (caddr_t)args->arg,
269		       sizeof(struct linux_flock));
270
271    case LINUX_F_SETLK:
272	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
273		   	    sizeof(struct linux_flock))))
274	    return error;
275	linux_to_bsd_flock(&linux_flock, bsd_flock);
276	fcntl_args.cmd = F_SETLK;
277	fcntl_args.arg = (int)bsd_flock;
278	return fcntl(p, &fcntl_args);
279
280    case LINUX_F_SETLKW:
281	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
282		   	    sizeof(struct linux_flock))))
283	    return error;
284	linux_to_bsd_flock(&linux_flock, bsd_flock);
285	fcntl_args.cmd = F_SETLKW;
286	fcntl_args.arg = (int)bsd_flock;
287	return fcntl(p, &fcntl_args);
288
289    case LINUX_F_SETOWN:
290    case LINUX_F_GETOWN:
291	/*
292	 * We need to route around the normal fcntl() for these calls,
293	 * since it uses TIOC{G,S}PGRP, which is too restrictive for
294	 * Linux F_{G,S}ETOWN semantics. For sockets, this problem
295	 * does not exist.
296	 */
297	fdp = p->p_fd;
298	if ((u_int)args->fd >= fdp->fd_nfiles ||
299		(fp = fdp->fd_ofiles[args->fd]) == NULL)
300	    return EBADF;
301	if (fp->f_type == DTYPE_SOCKET) {
302	    fcntl_args.cmd = args->cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN;
303    	    fcntl_args.arg = args->arg;
304	    return fcntl(p, &fcntl_args);
305	}
306	vp = (struct vnode *)fp->f_data;
307	dev = vn_todev(vp);
308	if (vp->v_type != VCHR || dev == NODEV)
309	    return EINVAL;
310	d_tty = devsw(dev)->d_devtotty;
311	if (!d_tty || (!(tp = (*d_tty)(dev))))
312	    return EINVAL;
313	if (args->cmd == LINUX_F_GETOWN) {
314	    p->p_retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
315	    return 0;
316	}
317	if ((long)args->arg <= 0) {
318	    pgid = -(long)args->arg;
319	} else {
320	    struct proc *p1 = pfind((long)args->arg);
321	    if (p1 == 0)
322		return (ESRCH);
323	    pgid = (long)p1->p_pgrp->pg_id;
324	}
325	pgrp = pgfind(pgid);
326	if (pgrp == NULL || pgrp->pg_session != p->p_session)
327	    return EPERM;
328	tp->t_pgrp = pgrp;
329	return 0;
330    }
331    return EINVAL;
332}
333
334int
335linux_lseek(struct proc *p, struct linux_lseek_args *args)
336{
337
338    struct lseek_args /* {
339	int fd;
340	int pad;
341	off_t offset;
342	int whence;
343    } */ tmp_args;
344    int error;
345
346#ifdef DEBUG
347    printf("Linux-emul(%ld): lseek(%d, %ld, %d)\n",
348	   (long)p->p_pid, args->fdes, args->off, args->whence);
349#endif
350    tmp_args.fd = args->fdes;
351    tmp_args.offset = (off_t)args->off;
352    tmp_args.whence = args->whence;
353    error = lseek(p, &tmp_args);
354    return error;
355}
356
357int
358linux_llseek(struct proc *p, struct linux_llseek_args *args)
359{
360	struct lseek_args bsd_args;
361	int error;
362	off_t off;
363
364#ifdef DEBUG
365        printf("Linux-emul(%d): llseek(%d, %d:%d, %d)\n",
366	   p->p_pid, args->fd, args->ohigh, args->olow, args->whence);
367#endif
368	off = (args->olow) | (((off_t) args->ohigh) << 32);
369
370	bsd_args.fd = args->fd;
371	bsd_args.offset = off;
372	bsd_args.whence = args->whence;
373
374	if ((error = lseek(p, &bsd_args)))
375		return error;
376
377	if ((error = copyout(p->p_retval, (caddr_t)args->res, sizeof (off_t))))
378		return error;
379
380	p->p_retval[0] = 0;
381	return 0;
382}
383
384
385struct linux_dirent {
386    long dino;
387    linux_off_t doff;
388    unsigned short dreclen;
389    char dname[LINUX_NAME_MAX + 1];
390};
391
392#define LINUX_RECLEN(de,namlen) \
393    ALIGN((((char *)&(de)->dname - (char *)de) + (namlen) + 1))
394
395int
396linux_readdir(struct proc *p, struct linux_readdir_args *args)
397{
398	struct linux_getdents_args lda;
399
400	lda.fd = args->fd;
401	lda.dent = args->dent;
402	lda.count = 1;
403	return linux_getdents(p, &lda);
404}
405
406int
407linux_getdents(struct proc *p, struct linux_getdents_args *args)
408{
409    register struct dirent *bdp;
410    struct vnode *vp;
411    caddr_t inp, buf;		/* BSD-format */
412    int len, reclen;		/* BSD-format */
413    caddr_t outp;		/* Linux-format */
414    int resid, linuxreclen=0;	/* Linux-format */
415    struct file *fp;
416    struct uio auio;
417    struct iovec aiov;
418    struct vattr va;
419    off_t off;
420    struct linux_dirent linux_dirent;
421    int buflen, error, eofflag, nbytes, justone;
422    u_long *cookies = NULL, *cookiep;
423    int ncookies;
424
425#ifdef DEBUG
426    printf("Linux-emul(%d): getdents(%d, *, %d)\n",
427	   p->p_pid, args->fd, args->count);
428#endif
429    if ((error = getvnode(p->p_fd, args->fd, &fp)) != 0) {
430	return (error);
431    }
432
433    if ((fp->f_flag & FREAD) == 0)
434	return (EBADF);
435
436    vp = (struct vnode *) fp->f_data;
437
438    if (vp->v_type != VDIR)
439	return (EINVAL);
440
441    if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) {
442	return error;
443    }
444
445    nbytes = args->count;
446    if (nbytes == 1) {
447	nbytes = sizeof (struct linux_dirent);
448	justone = 1;
449    }
450    else
451	justone = 0;
452
453    off = fp->f_offset;
454#define	DIRBLKSIZ	512		/* XXX we used to use ufs's DIRBLKSIZ */
455    buflen = max(DIRBLKSIZ, nbytes);
456    buflen = min(buflen, MAXBSIZE);
457    buf = malloc(buflen, M_TEMP, M_WAITOK);
458    vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
459again:
460    aiov.iov_base = buf;
461    aiov.iov_len = buflen;
462    auio.uio_iov = &aiov;
463    auio.uio_iovcnt = 1;
464    auio.uio_rw = UIO_READ;
465    auio.uio_segflg = UIO_SYSSPACE;
466    auio.uio_procp = p;
467    auio.uio_resid = buflen;
468    auio.uio_offset = off;
469
470    if (cookies) {
471	free(cookies, M_TEMP);
472	cookies = NULL;
473    }
474
475    error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies, &cookies);
476    if (error) {
477	goto out;
478    }
479
480    inp = buf;
481    outp = (caddr_t) args->dent;
482    resid = nbytes;
483    if ((len = buflen - auio.uio_resid) <= 0) {
484	goto eof;
485    }
486
487    cookiep = cookies;
488
489    if (cookies) {
490	/*
491	 * When using cookies, the vfs has the option of reading from
492	 * a different offset than that supplied (UFS truncates the
493	 * offset to a block boundary to make sure that it never reads
494	 * partway through a directory entry, even if the directory
495	 * has been compacted).
496	 */
497	while (len > 0 && ncookies > 0 && *cookiep <= off) {
498	    bdp = (struct dirent *) inp;
499	    len -= bdp->d_reclen;
500	    inp += bdp->d_reclen;
501	    cookiep++;
502	    ncookies--;
503	}
504    }
505
506    while (len > 0) {
507	if (cookiep && ncookies == 0)
508	    break;
509	bdp = (struct dirent *) inp;
510	reclen = bdp->d_reclen;
511	if (reclen & 3) {
512	    printf("linux_readdir: reclen=%d\n", reclen);
513	    error = EFAULT;
514	    goto out;
515	}
516
517	if (bdp->d_fileno == 0) {
518	    inp += reclen;
519	    if (cookiep) {
520		off = *cookiep++;
521		ncookies--;
522	    } else
523		off += reclen;
524	    len -= reclen;
525	    continue;
526	}
527	linuxreclen = LINUX_RECLEN(&linux_dirent, bdp->d_namlen);
528	if (reclen > len || resid < linuxreclen) {
529	    outp++;
530	    break;
531	}
532	linux_dirent.dino = (long) bdp->d_fileno;
533	if (justone) {
534	    /*
535	     * old linux-style readdir usage.
536	     */
537	    linux_dirent.doff = (linux_off_t) linuxreclen;
538	    linux_dirent.dreclen = (u_short) bdp->d_namlen;
539	} else {
540	    linux_dirent.doff = (linux_off_t) off;
541	    linux_dirent.dreclen = (u_short) linuxreclen;
542	}
543	strcpy(linux_dirent.dname, bdp->d_name);
544	if ((error = copyout((caddr_t)&linux_dirent, outp, linuxreclen))) {
545	    goto out;
546	}
547	inp += reclen;
548	if (cookiep) {
549	    off = *cookiep++;
550	    ncookies--;
551	} else
552	    off += reclen;
553	outp += linuxreclen;
554	resid -= linuxreclen;
555	len -= reclen;
556	if (justone)
557	    break;
558    }
559
560    if (outp == (caddr_t) args->dent)
561	goto again;
562    fp->f_offset = off;
563
564    if (justone)
565	nbytes = resid + linuxreclen;
566
567eof:
568    p->p_retval[0] = nbytes - resid;
569out:
570    if (cookies)
571	free(cookies, M_TEMP);
572    VOP_UNLOCK(vp, 0, p);
573    free(buf, M_TEMP);
574    return error;
575}
576
577/*
578 * These exist mainly for hooks for doing /compat/linux translation.
579 */
580
581int
582linux_access(struct proc *p, struct linux_access_args *args)
583{
584	struct access_args bsd;
585	caddr_t sg;
586
587	sg = stackgap_init();
588	CHECKALTEXIST(p, &sg, args->path);
589
590#ifdef DEBUG
591        printf("Linux-emul(%d): access(%s, %d)\n",
592	    p->p_pid, args->path, args->flags);
593#endif
594	bsd.path = args->path;
595	bsd.flags = args->flags;
596
597	return access(p, &bsd);
598}
599
600int
601linux_unlink(struct proc *p, struct linux_unlink_args *args)
602{
603	struct unlink_args bsd;
604	caddr_t sg;
605
606	sg = stackgap_init();
607	CHECKALTEXIST(p, &sg, args->path);
608
609#ifdef DEBUG
610	printf("Linux-emul(%d): unlink(%s)\n",
611	   p->p_pid, args->path);
612#endif
613	bsd.path = args->path;
614
615	return unlink(p, &bsd);
616}
617
618int
619linux_chdir(struct proc *p, struct linux_chdir_args *args)
620{
621	struct chdir_args bsd;
622	caddr_t sg;
623
624	sg = stackgap_init();
625	CHECKALTEXIST(p, &sg, args->path);
626
627#ifdef DEBUG
628	printf("Linux-emul(%d): chdir(%s)\n",
629	   p->p_pid, args->path);
630#endif
631	bsd.path = args->path;
632
633	return chdir(p, &bsd);
634}
635
636int
637linux_chmod(struct proc *p, struct linux_chmod_args *args)
638{
639	struct chmod_args bsd;
640	caddr_t sg;
641
642	sg = stackgap_init();
643	CHECKALTEXIST(p, &sg, args->path);
644
645#ifdef DEBUG
646        printf("Linux-emul(%d): chmod(%s, %d)\n",
647	    p->p_pid, args->path, args->mode);
648#endif
649	bsd.path = args->path;
650	bsd.mode = args->mode;
651
652	return chmod(p, &bsd);
653}
654
655int
656linux_chown(struct proc *p, struct linux_chown_args *args)
657{
658	struct chown_args bsd;
659	caddr_t sg;
660
661	sg = stackgap_init();
662	CHECKALTEXIST(p, &sg, args->path);
663
664#ifdef DEBUG
665        printf("Linux-emul(%d): chown(%s, %d, %d)\n",
666	    p->p_pid, args->path, args->uid, args->gid);
667#endif
668	bsd.path = args->path;
669	/* XXX size casts here */
670	bsd.uid = args->uid;
671	bsd.gid = args->gid;
672
673	return chown(p, &bsd);
674}
675
676int
677linux_lchown(struct proc *p, struct linux_lchown_args *args)
678{
679	struct lchown_args bsd;
680	caddr_t sg;
681
682	sg = stackgap_init();
683	CHECKALTEXIST(p, &sg, args->path);
684
685#ifdef DEBUG
686        printf("Linux-emul(%d): lchown(%s, %d, %d)\n",
687	    p->p_pid, args->path, args->uid, args->gid);
688#endif
689	bsd.path = args->path;
690	/* XXX size casts here */
691	bsd.uid = args->uid;
692	bsd.gid = args->gid;
693
694	return lchown(p, &bsd);
695}
696
697int
698linux_mkdir(struct proc *p, struct linux_mkdir_args *args)
699{
700	struct mkdir_args bsd;
701	caddr_t sg;
702
703	sg = stackgap_init();
704	CHECKALTCREAT(p, &sg, args->path);
705
706#ifdef DEBUG
707        printf("Linux-emul(%d): mkdir(%s, %d)\n",
708	    p->p_pid, args->path, args->mode);
709#endif
710	bsd.path = args->path;
711	bsd.mode = args->mode;
712
713	return mkdir(p, &bsd);
714}
715
716int
717linux_rmdir(struct proc *p, struct linux_rmdir_args *args)
718{
719	struct rmdir_args bsd;
720	caddr_t sg;
721
722	sg = stackgap_init();
723	CHECKALTEXIST(p, &sg, args->path);
724
725#ifdef DEBUG
726        printf("Linux-emul(%d): rmdir(%s)\n",
727	    p->p_pid, args->path);
728#endif
729	bsd.path = args->path;
730
731	return rmdir(p, &bsd);
732}
733
734int
735linux_rename(struct proc *p, struct linux_rename_args *args)
736{
737	struct rename_args bsd;
738	caddr_t sg;
739
740	sg = stackgap_init();
741	CHECKALTEXIST(p, &sg, args->from);
742	CHECKALTCREAT(p, &sg, args->to);
743
744#ifdef DEBUG
745        printf("Linux-emul(%d): rename(%s, %s)\n",
746	    p->p_pid, args->from, args->to);
747#endif
748	bsd.from = args->from;
749	bsd.to = args->to;
750
751	return rename(p, &bsd);
752}
753
754int
755linux_symlink(struct proc *p, struct linux_symlink_args *args)
756{
757	struct symlink_args bsd;
758	caddr_t sg;
759
760	sg = stackgap_init();
761	CHECKALTEXIST(p, &sg, args->path);
762	CHECKALTCREAT(p, &sg, args->to);
763
764#ifdef DEBUG
765        printf("Linux-emul(%d): symlink(%s, %s)\n",
766	    p->p_pid, args->path, args->to);
767#endif
768	bsd.path = args->path;
769	bsd.link = args->to;
770
771	return symlink(p, &bsd);
772}
773
774int
775linux_execve(struct proc *p, struct linux_execve_args *args)
776{
777	struct execve_args bsd;
778	caddr_t sg;
779
780	sg = stackgap_init();
781	CHECKALTEXIST(p, &sg, args->path);
782
783#ifdef DEBUG
784        printf("Linux-emul(%d): execve(%s)\n",
785	    p->p_pid, args->path);
786#endif
787	bsd.fname = args->path;
788	bsd.argv = args->argp;
789	bsd.envv = args->envp;
790
791	return execve(p, &bsd);
792}
793
794int
795linux_readlink(struct proc *p, struct linux_readlink_args *args)
796{
797	struct readlink_args bsd;
798	caddr_t sg;
799
800	sg = stackgap_init();
801	CHECKALTEXIST(p, &sg, args->name);
802
803#ifdef DEBUG
804        printf("Linux-emul(%ld): readlink(%s, %p, %d)\n",
805	    (long)p->p_pid, args->name, (void *)args->buf, args->count);
806#endif
807	bsd.path = args->name;
808	bsd.buf = args->buf;
809	bsd.count = args->count;
810
811	return readlink(p, &bsd);
812}
813
814int
815linux_truncate(struct proc *p, struct linux_truncate_args *args)
816{
817	struct truncate_args bsd;
818	caddr_t sg;
819
820	sg = stackgap_init();
821	CHECKALTEXIST(p, &sg, args->path);
822
823#ifdef DEBUG
824        printf("Linux-emul(%d): truncate(%s, %ld)\n",
825	    p->p_pid, args->path, args->length);
826#endif
827	bsd.path = args->path;
828	bsd.length = args->length;
829
830	return truncate(p, &bsd);
831}
832
833int
834linux_link(struct proc *p, struct linux_link_args *args)
835{
836    struct link_args bsd;
837    caddr_t sg;
838
839    sg = stackgap_init();
840    CHECKALTEXIST(p, &sg, args->path);
841    CHECKALTCREAT(p, &sg, args->to);
842
843#ifdef DEBUG
844    printf("Linux-emul(%d): link(%s, %s)\n", p->p_pid, args->path, args->to);
845#endif
846
847    bsd.path = args->path;
848    bsd.link = args->to;
849
850    return link(p, &bsd);
851}
852