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1/* $NetBSD: ntfs_vnops.c,v 1.23 1999/10/31 19:45:27 jdolecek Exp $ */
2
3/*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * John Heidemann of the UCLA Ficus project.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * $FreeBSD: src/sys/ntfs/ntfs_vnops.c,v 1.9.2.4 2002/08/06 19:35:18 semenu Exp $
39 * $DragonFly: src/sys/vfs/ntfs/ntfs_vnops.c,v 1.40 2007/05/09 00:53:36 dillon Exp $
40 *
41 */
42
43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/kernel.h>
46#include <sys/time.h>
47#include <sys/types.h>
48#include <sys/stat.h>
49#include <sys/vnode.h>
50#include <sys/mount.h>
51#include <sys/proc.h>
52#include <sys/namei.h>
53#include <sys/malloc.h>
54#include <sys/buf.h>
55#include <sys/dirent.h>
56#include <machine/limits.h>
57
58#include <vm/vm.h>
59#include <vm/vm_param.h>
60#if defined(__NetBSD__)
61#include <vm/vm_prot.h>
62#endif
63#include <vm/vm_page.h>
64#include <vm/vm_object.h>
65#include <vm/vm_pager.h>
66#if defined(__DragonFly__)
67#include <vm/vnode_pager.h>
68#endif
69#include <vm/vm_extern.h>
70
71#include <sys/sysctl.h>
72
73/*#define NTFS_DEBUG 1*/
74#include "ntfs.h"
75#include "ntfs_inode.h"
76#include "ntfs_subr.h"
77#if defined(__NetBSD__)
78#include <miscfs/specfs/specdev.h>
79#include <miscfs/genfs/genfs.h>
80#endif
81
82#include <sys/unistd.h> /* for pathconf(2) constants */
83
84static int ntfs_read (struct vop_read_args *);
85static int ntfs_write (struct vop_write_args *ap);
86static int ntfs_getattr (struct vop_getattr_args *ap);
87static int ntfs_inactive (struct vop_inactive_args *ap);
88static int ntfs_print (struct vop_print_args *ap);
89static int ntfs_reclaim (struct vop_reclaim_args *ap);
90static int ntfs_strategy (struct vop_strategy_args *ap);
91static int ntfs_access (struct vop_access_args *ap);
92static int ntfs_open (struct vop_open_args *ap);
93static int ntfs_close (struct vop_close_args *ap);
94static int ntfs_readdir (struct vop_readdir_args *ap);
95static int ntfs_lookup (struct vop_old_lookup_args *ap);
96static int ntfs_bmap (struct vop_bmap_args *ap);
97#if defined(__DragonFly__)
98static int ntfs_getpages (struct vop_getpages_args *ap);
99static int ntfs_putpages (struct vop_putpages_args *);
100static int ntfs_fsync (struct vop_fsync_args *ap);
101#else
102static int ntfs_bypass (struct vop_generic_args *);
103#endif
104static int ntfs_pathconf (struct vop_pathconf_args *);
105
106int ntfs_prtactive = 1; /* 1 => print out reclaim of active vnodes */
107
108#if defined(__DragonFly__)
109int
110ntfs_getpages(struct vop_getpages_args *ap)
111{
112 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
113 ap->a_reqpage);
114}
115
116int
117ntfs_putpages(struct vop_putpages_args *ap)
118{
119 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
120 ap->a_sync, ap->a_rtvals);
121}
122#endif
123
124/*
125 * This is a noop, simply returning what one has been given.
126 *
127 * ntfs_bmap(struct vnode *a_vp, off_t a_loffset, struct vnode **a_vpp,
128 * daddr_t *a_doffsetp, int *a_runp, int *a_runb)
129 */
130int
131ntfs_bmap(struct vop_bmap_args *ap)
132{
133 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn));
134 if (ap->a_vpp != NULL)
135 *ap->a_vpp = ap->a_vp;
136 if (ap->a_doffsetp != NULL)
137 *ap->a_doffsetp = ap->a_loffset;
138 if (ap->a_runp != NULL)
139 *ap->a_runp = 0;
140#if !defined(__NetBSD__)
141 if (ap->a_runb != NULL)
142 *ap->a_runb = 0;
143#endif
144 return (0);
145}
146
147/*
148 * ntfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
149 * struct ucred *a_cred)
150 */
151static int
152ntfs_read(struct vop_read_args *ap)
153{
154 struct vnode *vp = ap->a_vp;
155 struct fnode *fp = VTOF(vp);
156 struct ntnode *ip = FTONT(fp);
157 struct uio *uio = ap->a_uio;
158 struct ntfsmount *ntmp = ip->i_mp;
159 struct buf *bp;
160 daddr_t cn;
161 int resid, off, toread;
162 int error;
163
164 dprintf(("ntfs_read: ino: %d, off: %d resid: %d, segflg: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg));
165
166 dprintf(("ntfs_read: filesize: %d",(u_int32_t)fp->f_size));
167
168 /* don't allow reading after end of file */
169 if (uio->uio_offset > fp->f_size)
170 return (0);
171
172 resid = min(uio->uio_resid, fp->f_size - uio->uio_offset);
173
174 dprintf((", resid: %d\n", resid));
175
176 error = 0;
177 while (resid) {
178 cn = ntfs_btocn(uio->uio_offset);
179 off = ntfs_btocnoff(uio->uio_offset);
180
181 toread = min(off + resid, ntfs_cntob(1));
182
183 error = bread(vp, ntfs_cntodoff(cn), ntfs_cntob(1), &bp);
184 if (error) {
185 brelse(bp);
186 break;
187 }
188
189 error = uiomove(bp->b_data + off, toread - off, uio);
190 if(error) {
191 brelse(bp);
192 break;
193 }
194 brelse(bp);
195
196 resid -= toread - off;
197 }
198
199 return (error);
200}
201
202#if !defined(__DragonFly__)
203
204/*
205 * ntfs_bypass()
206 */
207static int
208ntfs_bypass(struct vop_generic_args *ap)
209{
210 int error = ENOTTY;
211 dprintf(("ntfs_bypass: %s\n", ap->a_desc->sd_name));
212 return (error);
213}
214
215#endif
216
217/*
218 * ntfs_getattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred,
219 * struct thread *a_td)
220 */
221static int
222ntfs_getattr(struct vop_getattr_args *ap)
223{
224 struct vnode *vp = ap->a_vp;
225 struct fnode *fp = VTOF(vp);
226 struct ntnode *ip = FTONT(fp);
227 struct vattr *vap = ap->a_vap;
228
229 dprintf(("ntfs_getattr: %d, flags: %d\n",ip->i_number,ip->i_flag));
230
231#if defined(__DragonFly__)
232 vap->va_fsid = dev2udev(ip->i_dev);
233#else /* NetBSD */
234 vap->va_fsid = ip->i_dev;
235#endif
236 vap->va_fileid = ip->i_number;
237 vap->va_mode = ip->i_mp->ntm_mode;
238 vap->va_nlink = ip->i_nlink;
239 vap->va_uid = ip->i_mp->ntm_uid;
240 vap->va_gid = ip->i_mp->ntm_gid;
241 vap->va_rmajor = VNOVAL;
242 vap->va_rminor = VNOVAL;
243 vap->va_size = fp->f_size;
244 vap->va_bytes = fp->f_allocated;
245 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access);
246 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write);
247 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create);
248 vap->va_flags = ip->i_flag;
249 vap->va_gen = 0;
250 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps;
251 vap->va_type = vp->v_type;
252 vap->va_filerev = 0;
253 return (0);
254}
255
256
257/*
258 * Last reference to an ntnode. If necessary, write or delete it.
259 *
260 * ntfs_inactive(struct vnode *a_vp)
261 */
262int
263ntfs_inactive(struct vop_inactive_args *ap)
264{
265 struct vnode *vp = ap->a_vp;
266#ifdef NTFS_DEBUG
267 struct ntnode *ip = VTONT(vp);
268#endif
269
270 dprintf(("ntfs_inactive: vnode: %p, ntnode: %d\n", vp, ip->i_number));
271
272 if (ntfs_prtactive && vp->v_sysref.refcnt > 1)
273 vprint("ntfs_inactive: pushing active", vp);
274
275 /*
276 * XXX since we don't support any filesystem changes
277 * right now, nothing more needs to be done
278 */
279 return (0);
280}
281
282/*
283 * Reclaim an fnode/ntnode so that it can be used for other purposes.
284 *
285 * ntfs_reclaim(struct vnode *a_vp)
286 */
287int
288ntfs_reclaim(struct vop_reclaim_args *ap)
289{
290 struct vnode *vp = ap->a_vp;
291 struct fnode *fp = VTOF(vp);
292 struct ntnode *ip = FTONT(fp);
293 int error;
294
295 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %d\n", vp, ip->i_number));
296
297 if (ntfs_prtactive && vp->v_sysref.refcnt > 1)
298 vprint("ntfs_reclaim: pushing active", vp);
299
300 if ((error = ntfs_ntget(ip)) != 0)
301 return (error);
302
303 ntfs_frele(fp);
304 ntfs_ntput(ip);
305 vp->v_data = NULL;
306
307 return (0);
308}
309
310/*
311 * ntfs_print(struct vnode *a_vp)
312 */
313static int
314ntfs_print(struct vop_print_args *ap)
315{
316 return (0);
317}
318
319/*
320 * Calculate the logical to physical mapping if not done already,
321 * then call the device strategy routine.
322 *
323 * ntfs_strategy(struct vnode *a_vp, struct bio *a_bio)
324 */
325int
326ntfs_strategy(struct vop_strategy_args *ap)
327{
328 struct bio *bio = ap->a_bio;
329 struct buf *bp = bio->bio_buf;
330 struct vnode *vp = ap->a_vp;
331 struct fnode *fp = VTOF(vp);
332 struct ntnode *ip = FTONT(fp);
333 struct ntfsmount *ntmp = ip->i_mp;
334 u_int32_t toread;
335 u_int32_t towrite;
336 size_t tmp;
337 int error;
338
339 dprintf(("ntfs_strategy: loffset: %lld, doffset: %lld\n",
340 bp->b_loffset, bio->bio_offset));
341
342 dprintf(("strategy: bcount: %d flags: 0x%lx\n",
343 (u_int32_t)bp->b_bcount,bp->b_flags));
344
345 bp->b_error = 0;
346
347 switch(bp->b_cmd) {
348 case BUF_CMD_READ:
349 if (bio->bio_offset >= fp->f_size) {
350 clrbuf(bp);
351 error = 0;
352 } else {
353 toread = min(bp->b_bcount,
354 fp->f_size - bio->bio_offset);
355 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n",
356 toread,(u_int32_t)fp->f_size));
357
358 error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
359 fp->f_attrname, bio->bio_offset,
360 toread, bp->b_data, NULL);
361
362 if (error) {
363 kprintf("ntfs_strategy: ntfs_readattr failed\n");
364 bp->b_error = error;
365 bp->b_flags |= B_ERROR;
366 }
367
368 bzero(bp->b_data + toread, bp->b_bcount - toread);
369 }
370 break;
371 case BUF_CMD_WRITE:
372 if (bio->bio_offset + bp->b_bcount >= fp->f_size) {
373 kprintf("ntfs_strategy: CAN'T EXTEND FILE\n");
374 bp->b_error = error = EFBIG;
375 bp->b_flags |= B_ERROR;
376 } else {
377 towrite = min(bp->b_bcount,
378 fp->f_size - bio->bio_offset);
379 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n",
380 towrite,(u_int32_t)fp->f_size));
381
382 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
383 fp->f_attrname, bio->bio_offset,towrite,
384 bp->b_data, &tmp, NULL);
385
386 if (error) {
387 kprintf("ntfs_strategy: ntfs_writeattr fail\n");
388 bp->b_error = error;
389 bp->b_flags |= B_ERROR;
390 }
391 }
392 break;
393 default:
394 panic("ntfs: bad b_cmd %d\n", bp->b_cmd);
395 }
396 biodone(bio);
397 return (error);
398}
399
400/*
401 * ntfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
402 * struct ucred *a_cred)
403 */
404static int
405ntfs_write(struct vop_write_args *ap)
406{
407 struct vnode *vp = ap->a_vp;
408 struct fnode *fp = VTOF(vp);
409 struct ntnode *ip = FTONT(fp);
410 struct uio *uio = ap->a_uio;
411 struct ntfsmount *ntmp = ip->i_mp;
412 u_int64_t towrite;
413 size_t written;
414 int error;
415
416 dprintf(("ntfs_write: ino: %d, off: %d resid: %d, segflg: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg));
417 dprintf(("ntfs_write: filesize: %d",(u_int32_t)fp->f_size));
418
419 if (uio->uio_resid + uio->uio_offset > fp->f_size) {
420 kprintf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n");
421 return (EFBIG);
422 }
423
424 towrite = min(uio->uio_resid, fp->f_size - uio->uio_offset);
425
426 dprintf((", towrite: %d\n",(u_int32_t)towrite));
427
428 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
429 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio);
430#ifdef NTFS_DEBUG
431 if (error)
432 kprintf("ntfs_write: ntfs_writeattr failed: %d\n", error);
433#endif
434
435 return (error);
436}
437
438/*
439 * ntfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
440 * struct thread *a_td)
441 */
442int
443ntfs_access(struct vop_access_args *ap)
444{
445 struct vnode *vp = ap->a_vp;
446 struct ntnode *ip = VTONT(vp);
447 struct ucred *cred = ap->a_cred;
448 mode_t mask, mode = ap->a_mode;
449 gid_t *gp;
450 int i;
451#ifdef QUOTA
452 int error;
453#endif
454
455 dprintf(("ntfs_access: %d\n",ip->i_number));
456
457 /*
458 * Disallow write attempts on read-only file systems;
459 * unless the file is a socket, fifo, or a block or
460 * character device resident on the file system.
461 */
462 if (mode & VWRITE) {
463 switch ((int)vp->v_type) {
464 case VDIR:
465 case VLNK:
466 case VREG:
467 if (vp->v_mount->mnt_flag & MNT_RDONLY)
468 return (EROFS);
469#ifdef QUOTA
470 if (error = getinoquota(ip))
471 return (error);
472#endif
473 break;
474 }
475 }
476
477 /* Otherwise, user id 0 always gets access. */
478 if (cred->cr_uid == 0)
479 return (0);
480
481 mask = 0;
482
483 /* Otherwise, check the owner. */
484 if (cred->cr_uid == ip->i_mp->ntm_uid) {
485 if (mode & VEXEC)
486 mask |= S_IXUSR;
487 if (mode & VREAD)
488 mask |= S_IRUSR;
489 if (mode & VWRITE)
490 mask |= S_IWUSR;
491 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
492 }
493
494 /* Otherwise, check the groups. */
495 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
496 if (ip->i_mp->ntm_gid == *gp) {
497 if (mode & VEXEC)
498 mask |= S_IXGRP;
499 if (mode & VREAD)
500 mask |= S_IRGRP;
501 if (mode & VWRITE)
502 mask |= S_IWGRP;
503 return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES);
504 }
505
506 /* Otherwise, check everyone else. */
507 if (mode & VEXEC)
508 mask |= S_IXOTH;
509 if (mode & VREAD)
510 mask |= S_IROTH;
511 if (mode & VWRITE)
512 mask |= S_IWOTH;
513 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
514}
515
516/*
517 * Open called.
518 *
519 * Nothing to do.
520 *
521 * ntfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
522 * struct thread *a_td)
523 */
524/* ARGSUSED */
525static int
526ntfs_open(struct vop_open_args *ap)
527{
528 return (vop_stdopen(ap));
529}
530
531/*
532 * Close called.
533 *
534 * Update the times on the inode.
535 *
536 * ntfs_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
537 * struct thread *a_td)
538 */
539/* ARGSUSED */
540static int
541ntfs_close(struct vop_close_args *ap)
542{
543#if NTFS_DEBUG
544 struct vnode *vp = ap->a_vp;
545 struct ntnode *ip = VTONT(vp);
546
547 kprintf("ntfs_close: %d\n",ip->i_number);
548#endif
549
550 return (vop_stdclose(ap));
551}
552
553/*
554 * ntfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
555 * int *a_ncookies, u_int **cookies)
556 */
557int
558ntfs_readdir(struct vop_readdir_args *ap)
559{
560 struct vnode *vp = ap->a_vp;
561 struct fnode *fp = VTOF(vp);
562 struct ntnode *ip = FTONT(fp);
563 struct uio *uio = ap->a_uio;
564 struct ntfsmount *ntmp = ip->i_mp;
565 int i, error = 0;
566 u_int32_t faked = 0, num, off;
567 int ncookies = 0;
568 char convname[NTFS_MAXFILENAME + 1];
569
570 dprintf(("ntfs_readdir %d off: %d resid: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid));
571
572 if (uio->uio_offset < 0 || uio->uio_offset > INT_MAX)
573 return (EINVAL);
574 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
575 return (error);
576
577 /*
578 * uio->uio_offset carries the number of the entry
579 * where we should start returning dirents.
580 *
581 * We fake up "." if we're not reading the FS root
582 * and we always fake up "..".
583 *
584 * off contains the entry we are starting at,
585 * num increments while we are reading.
586 */
587
588 off = num = uio->uio_offset;
589 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2;
590
591 /* Simulate . in every dir except ROOT */
592 if (ip->i_number != NTFS_ROOTINO && num == 0) {
593 if (vop_write_dirent(&error, uio, ip->i_number,
594 DT_DIR, 1, "."))
595 goto done;
596 if (error)
597 goto done;
598
599 num++;
600 ncookies++;
601 }
602
603 /* Simulate .. in every dir including ROOT */
604 if (num == faked - 1) {
605 /* XXX NTFS_ROOTINO seems to be wrong here */
606 if (vop_write_dirent(&error, uio, NTFS_ROOTINO,
607 DT_DIR, 2, ".."))
608 goto readdone;
609 if (error)
610 goto done;
611
612 num++;
613 ncookies++;
614 }
615
616 for (;;) {
617 struct attr_indexentry *iep;
618
619 /*
620 * num is the number of the entry we will return,
621 * but ntfs_ntreaddir takes the entry number of the
622 * ntfs directory listing, so subtract the faked
623 * . and .. entries.
624 */
625 error = ntfs_ntreaddir(ntmp, fp, num - faked, &iep);
626
627 if (error)
628 goto done;
629
630 if( NULL == iep )
631 break;
632
633 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST);
634 iep = NTFS_NEXTREC(iep, struct attr_indexentry *))
635 {
636 if(!ntfs_isnamepermitted(ntmp,iep))
637 continue;
638
639 for (i=0; i < iep->ie_fnamelen; i++)
640 convname[i] = NTFS_U28(iep->ie_fname[i]);
641 convname[i] = '\0';
642
643 if (vop_write_dirent(&error, uio, iep->ie_number,
644 (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG,
645 iep->ie_fnamelen, convname))
646 goto readdone;
647
648 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, "
649 "flag: %d, %s\n",
650 ncookies, convname, iep->ie_fnametype,
651 iep->ie_flag,
652 (iep->ie_fflag & NTFS_FFLAG_DIR) ?
653 "dir" : "reg"));
654
655 if (error)
656 goto done;
657
658 ncookies++;
659 num++;
660 }
661 }
662
663readdone:
664 uio->uio_offset = num;
665
666 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n",
667 ncookies,(u_int)(uio->uio_offset - off)));
668 dprintf(("ntfs_readdir: off: %d resid: %d\n",
669 (u_int32_t)uio->uio_offset,uio->uio_resid));
670
671 if (!error && ap->a_ncookies != NULL) {
672#if defined(__DragonFly__)
673 u_long *cookies;
674 u_long *cookiep;
675#else /* defined(__NetBSD__) */
676 off_t *cookies;
677 off_t *cookiep;
678#endif
679
680 ddprintf(("ntfs_readdir: %d cookies\n",ncookies));
681 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
682 panic("ntfs_readdir: unexpected uio from NFS server");
683#if defined(__DragonFly__)
684 MALLOC(cookies, u_long *, ncookies * sizeof(u_long),
685 M_TEMP, M_WAITOK);
686#else /* defined(__NetBSD__) */
687 MALLOC(cookies, off_t *, ncookies * sizeof(off_t),
688 M_TEMP, M_WAITOK);
689#endif
690 cookiep = cookies;
691 while (off < num)
692 *cookiep++ = ++off;
693
694 *ap->a_ncookies = ncookies;
695 *ap->a_cookies = cookies;
696 }
697/*
698 if (ap->a_eofflag)
699 *ap->a_eofflag = VTONT(vp)->i_size <= uio->uio_offset;
700*/
701done:
702 vn_unlock(vp);
703 return (error);
704}
705
706/*
707 * ntfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
708 * struct componentname *a_cnp)
709 */
710int
711ntfs_lookup(struct vop_old_lookup_args *ap)
712{
713 struct vnode *dvp = ap->a_dvp;
714 struct ntnode *dip = VTONT(dvp);
715 struct ntfsmount *ntmp = dip->i_mp;
716 struct componentname *cnp = ap->a_cnp;
717 int error;
718 int lockparent = cnp->cn_flags & CNP_LOCKPARENT;
719#if NTFS_DEBUG
720 int wantparent = cnp->cn_flags & (CNP_LOCKPARENT | CNP_WANTPARENT);
721#endif
722 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %d, lp: %d, wp: %d \n",
723 (int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen,
724 dip->i_number, lockparent, wantparent));
725
726 *ap->a_vpp = NULL;
727
728 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
729 dprintf(("ntfs_lookup: faking . directory in %d\n",
730 dip->i_number));
731
732 vref(dvp);
733 *ap->a_vpp = dvp;
734 error = 0;
735 } else if (cnp->cn_flags & CNP_ISDOTDOT) {
736 struct ntvattr *vap;
737
738 dprintf(("ntfs_lookup: faking .. directory in %d\n",
739 dip->i_number));
740
741 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
742 if(error)
743 return (error);
744
745 VOP__UNLOCK(dvp, 0);
746 cnp->cn_flags |= CNP_PDIRUNLOCK;
747
748 dprintf(("ntfs_lookup: parentdir: %d\n",
749 vap->va_a_name->n_pnumber));
750 error = VFS_VGET(ntmp->ntm_mountp,
751 vap->va_a_name->n_pnumber,ap->a_vpp);
752 ntfs_ntvattrrele(vap);
753 if (error) {
754 if (VN_LOCK(dvp, LK_EXCLUSIVE | LK_RETRY) == 0)
755 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
756 return (error);
757 }
758
759 if (lockparent) {
760 error = VN_LOCK(dvp, LK_EXCLUSIVE);
761 if (error) {
762 vput(*ap->a_vpp);
763 *ap->a_vpp = NULL;
764 return (error);
765 }
766 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
767 }
768 } else {
769 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp);
770 if (error) {
771 dprintf(("ntfs_ntlookupfile: returned %d\n", error));
772 return (error);
773 }
774
775 dprintf(("ntfs_lookup: found ino: %d\n",
776 VTONT(*ap->a_vpp)->i_number));
777
778 if (!lockparent)
779 VOP__UNLOCK(dvp, 0);
780 }
781 return (error);
782}
783
784#if defined(__DragonFly__)
785/*
786 * Flush the blocks of a file to disk.
787 *
788 * This function is worthless for vnodes that represent directories. Maybe we
789 * could just do a sync if they try an fsync on a directory file.
790 *
791 * ntfs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor,
792 * struct thread *a_td)
793 */
794static int
795ntfs_fsync(struct vop_fsync_args *ap)
796{
797 return (0);
798}
799#endif
800
801/*
802 * Return POSIX pathconf information applicable to NTFS filesystem
803 */
804int
805ntfs_pathconf(struct vop_pathconf_args *ap)
806{
807 switch (ap->a_name) {
808 case _PC_LINK_MAX:
809 *ap->a_retval = 1;
810 return (0);
811 case _PC_NAME_MAX:
812 *ap->a_retval = NTFS_MAXFILENAME;
813 return (0);
814 case _PC_PATH_MAX:
815 *ap->a_retval = PATH_MAX;
816 return (0);
817 case _PC_CHOWN_RESTRICTED:
818 *ap->a_retval = 1;
819 return (0);
820 case _PC_NO_TRUNC:
821 *ap->a_retval = 0;
822 return (0);
823#if defined(__NetBSD__)
824 case _PC_SYNC_IO:
825 *ap->a_retval = 1;
826 return (0);
827 case _PC_FILESIZEBITS:
828 *ap->a_retval = 64;
829 return (0);
830#endif
831 default:
832 return (EINVAL);
833 }
834 /* NOTREACHED */
835}
836
837/*
838 * Global vfs data structures
839 */
840struct vop_ops ntfs_vnode_vops = {
841 .vop_default = vop_defaultop,
842 .vop_getattr = ntfs_getattr,
843 .vop_inactive = ntfs_inactive,
844 .vop_reclaim = ntfs_reclaim,
845 .vop_print = ntfs_print,
846 .vop_pathconf = ntfs_pathconf,
847 .vop_old_lookup = ntfs_lookup,
848 .vop_access = ntfs_access,
849 .vop_close = ntfs_close,
850 .vop_open = ntfs_open,
851 .vop_readdir = ntfs_readdir,
852 .vop_fsync = ntfs_fsync,
853 .vop_bmap = ntfs_bmap,
854 .vop_getpages = ntfs_getpages,
855 .vop_putpages = ntfs_putpages,
856 .vop_strategy = ntfs_strategy,
857 .vop_read = ntfs_read,
858 .vop_write = ntfs_write
859};
860