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. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $FreeBSD: src/sys/ntfs/ntfs_vnops.c,v 1.9.2.4 2002/08/06 19:35:18 semenu Exp $
35 *
36 */
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/uio.h>
41 #include <sys/kernel.h>
42 #include <sys/time.h>
43 #include <sys/types.h>
44 #include <sys/stat.h>
45 #include <sys/vnode.h>
46 #include <sys/mount.h>
47 #include <sys/proc.h>
48 #include <sys/namei.h>
49 #include <sys/malloc.h>
50 #include <sys/buf.h>
51 #include <sys/dirent.h>
52 #include <machine/limits.h>
53
54 #include <vm/vm.h>
55 #include <vm/vm_param.h>
56 #include <vm/vm_page.h>
57 #include <vm/vm_object.h>
58 #include <vm/vm_pager.h>
59 #include <vm/vnode_pager.h>
60 #include <vm/vm_extern.h>
61
62 #include <sys/sysctl.h>
63
64 #include <sys/buf2.h>
65
66 #include "ntfs.h"
67 #include "ntfs_inode.h"
68 #include "ntfs_subr.h"
69
70 #include <sys/unistd.h> /* for pathconf(2) constants */
71
72 static int ntfs_read (struct vop_read_args *);
73 static int ntfs_write (struct vop_write_args *ap);
74 static int ntfs_getattr (struct vop_getattr_args *ap);
75 static int ntfs_inactive (struct vop_inactive_args *ap);
76 static int ntfs_print (struct vop_print_args *ap);
77 static int ntfs_reclaim (struct vop_reclaim_args *ap);
78 static int ntfs_strategy (struct vop_strategy_args *ap);
79 static int ntfs_access (struct vop_access_args *ap);
80 static int ntfs_open (struct vop_open_args *ap);
81 static int ntfs_close (struct vop_close_args *ap);
82 static int ntfs_readdir (struct vop_readdir_args *ap);
83 static int ntfs_lookup (struct vop_old_lookup_args *ap);
84 static int ntfs_bmap (struct vop_bmap_args *ap);
85 static int ntfs_fsync (struct vop_fsync_args *ap);
86 static int ntfs_pathconf (struct vop_pathconf_args *);
87
88 int ntfs_prtactive = 1; /* 1 => print out reclaim of active vnodes */
89
90 /*
91 * This is a noop, simply returning what one has been given.
92 *
93 * ntfs_bmap(struct vnode *a_vp, off_t a_loffset,
94 * daddr_t *a_doffsetp, int *a_runp, int *a_runb)
95 */
96 int
ntfs_bmap(struct vop_bmap_args * ap)97 ntfs_bmap(struct vop_bmap_args *ap)
98 {
99 dprintf(("ntfs_bmap: vn: %p, blk: %u\n", ap->a_vp,
100 (u_int32_t)ap->a_loffset));
101 if (ap->a_doffsetp != NULL)
102 *ap->a_doffsetp = ap->a_loffset;
103 if (ap->a_runp != NULL)
104 *ap->a_runp = 0;
105 if (ap->a_runb != NULL)
106 *ap->a_runb = 0;
107 return (0);
108 }
109
110 /*
111 * ntfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
112 * struct ucred *a_cred)
113 */
114 static int
ntfs_read(struct vop_read_args * ap)115 ntfs_read(struct vop_read_args *ap)
116 {
117 struct vnode *vp = ap->a_vp;
118 struct fnode *fp = VTOF(vp);
119 struct ntnode *ip = FTONT(fp);
120 struct uio *uio = ap->a_uio;
121 struct ntfsmount *ntmp = ip->i_mp;
122 struct buf *bp;
123 daddr_t cn;
124 int resid, off, toread;
125 int error;
126
127 dprintf(("ntfs_read: ino: %ju, off: %u resid: %zd, segflg: %d\n",
128 (uintmax_t)ip->i_number, (uint32_t)uio->uio_offset,
129 uio->uio_resid, uio->uio_segflg));
130
131 dprintf(("ntfs_read: filesize: %ju", (uintmax_t)fp->f_size));
132
133 /* don't allow reading after end of file */
134 if (uio->uio_offset > fp->f_size)
135 return (0);
136
137 resid = (int)szmin(uio->uio_resid, fp->f_size - uio->uio_offset);
138
139 dprintf((", resid: %d\n", resid));
140
141 error = 0;
142 while (resid) {
143 cn = ntfs_btocn(uio->uio_offset);
144 off = ntfs_btocnoff(uio->uio_offset);
145
146 toread = min(off + resid, ntfs_cntob(1));
147
148 error = bread(vp, ntfs_cntodoff(cn), ntfs_cntob(1), &bp);
149 if (error) {
150 brelse(bp);
151 break;
152 }
153
154 error = uiomovebp(bp, bp->b_data + off, toread - off, uio);
155 if(error) {
156 brelse(bp);
157 break;
158 }
159 brelse(bp);
160
161 resid -= toread - off;
162 }
163
164 return (error);
165 }
166
167 /*
168 * ntfs_getattr(struct vnode *a_vp, struct vattr *a_vap)
169 */
170 static int
ntfs_getattr(struct vop_getattr_args * ap)171 ntfs_getattr(struct vop_getattr_args *ap)
172 {
173 struct vnode *vp = ap->a_vp;
174 struct fnode *fp = VTOF(vp);
175 struct ntnode *ip = FTONT(fp);
176 struct vattr *vap = ap->a_vap;
177
178 dprintf(("ntfs_getattr: %ju, flags: %d\n", (uintmax_t)ip->i_number,
179 ip->i_flag));
180
181 vap->va_fsid = devid_from_dev(ip->i_dev);
182 vap->va_fileid = ip->i_number;
183 vap->va_mode = ip->i_mp->ntm_mode;
184 vap->va_nlink = ip->i_nlink;
185 vap->va_uid = ip->i_mp->ntm_uid;
186 vap->va_gid = ip->i_mp->ntm_gid;
187 vap->va_rmajor = VNOVAL;
188 vap->va_rminor = VNOVAL;
189 vap->va_size = fp->f_size;
190 vap->va_bytes = fp->f_allocated;
191 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access);
192 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write);
193 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create);
194 vap->va_flags = ip->i_flag;
195 vap->va_gen = 0;
196 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps;
197 vap->va_type = vp->v_type;
198 vap->va_filerev = 0;
199 return (0);
200 }
201
202
203 /*
204 * Last reference to an ntnode. If necessary, write or delete it.
205 *
206 * ntfs_inactive(struct vnode *a_vp)
207 */
208 int
ntfs_inactive(struct vop_inactive_args * ap)209 ntfs_inactive(struct vop_inactive_args *ap)
210 {
211 struct vnode *vp = ap->a_vp;
212 #ifdef NTFS_DEBUG
213 struct ntnode *ip = VTONT(vp);
214 #endif
215
216 dprintf(("ntfs_inactive: vnode: %p, ntnode: %ju\n", vp, (uintmax_t)ip->i_number));
217
218 if (ntfs_prtactive && VREFCNT(vp) > 1)
219 vprint("ntfs_inactive: pushing active", vp);
220
221 /*
222 * XXX since we don't support any filesystem changes
223 * right now, nothing more needs to be done
224 */
225 return (0);
226 }
227
228 /*
229 * Reclaim an fnode/ntnode so that it can be used for other purposes.
230 *
231 * ntfs_reclaim(struct vnode *a_vp)
232 */
233 int
ntfs_reclaim(struct vop_reclaim_args * ap)234 ntfs_reclaim(struct vop_reclaim_args *ap)
235 {
236 struct vnode *vp = ap->a_vp;
237 struct fnode *fp = VTOF(vp);
238 struct ntnode *ip = FTONT(fp);
239 int error;
240
241 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %ju\n", vp, (uintmax_t)ip->i_number));
242
243 if (ntfs_prtactive && VREFCNT(vp) > 1)
244 vprint("ntfs_reclaim: pushing active", vp);
245
246 if ((error = ntfs_ntget(ip)) != 0)
247 return (error);
248
249 ntfs_frele(fp);
250 ntfs_ntput(ip);
251 vp->v_data = NULL;
252
253 return (0);
254 }
255
256 /*
257 * ntfs_print(struct vnode *a_vp)
258 */
259 static int
ntfs_print(struct vop_print_args * ap)260 ntfs_print(struct vop_print_args *ap)
261 {
262 return (0);
263 }
264
265 /*
266 * Calculate the logical to physical mapping if not done already,
267 * then call the device strategy routine.
268 *
269 * ntfs_strategy(struct vnode *a_vp, struct bio *a_bio)
270 */
271 int
ntfs_strategy(struct vop_strategy_args * ap)272 ntfs_strategy(struct vop_strategy_args *ap)
273 {
274 struct bio *bio = ap->a_bio;
275 struct buf *bp = bio->bio_buf;
276 struct vnode *vp = ap->a_vp;
277 struct fnode *fp = VTOF(vp);
278 struct ntnode *ip = FTONT(fp);
279 struct ntfsmount *ntmp = ip->i_mp;
280 u_int32_t toread;
281 u_int32_t towrite;
282 size_t tmp;
283 int error;
284
285 dprintf(("ntfs_strategy: loffset: %u, doffset: %u\n",
286 (uint32_t)bp->b_loffset, (uint32_t)bio->bio_offset));
287
288 dprintf(("strategy: bcount: %u flags: 0x%x\n",
289 bp->b_bcount, bp->b_flags));
290
291 bp->b_error = 0;
292
293 switch(bp->b_cmd) {
294 case BUF_CMD_READ:
295 if (bio->bio_offset >= fp->f_size) {
296 clrbuf(bp);
297 error = 0;
298 } else {
299 toread = min(bp->b_bcount,
300 fp->f_size - bio->bio_offset);
301 dprintf(("ntfs_strategy: toread: %u, fsize: %ju\n",
302 toread, (uintmax_t)fp->f_size));
303
304 error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
305 fp->f_attrname, bio->bio_offset,
306 toread, bp->b_data, NULL);
307
308 if (error) {
309 kprintf("ntfs_strategy: ntfs_readattr failed\n");
310 bp->b_error = error;
311 bp->b_flags |= B_ERROR;
312 }
313
314 bzero(bp->b_data + toread, bp->b_bcount - toread);
315 }
316 break;
317 case BUF_CMD_WRITE:
318 if (bio->bio_offset + bp->b_bcount >= fp->f_size) {
319 kprintf("ntfs_strategy: CAN'T EXTEND FILE\n");
320 bp->b_error = error = EFBIG;
321 bp->b_flags |= B_ERROR;
322 } else {
323 towrite = min(bp->b_bcount,
324 fp->f_size - bio->bio_offset);
325 dprintf(("ntfs_strategy: towrite: %d, fsize: %ju\n",
326 towrite, (uintmax_t)fp->f_size));
327
328 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
329 fp->f_attrname, bio->bio_offset,towrite,
330 bp->b_data, &tmp, NULL);
331
332 if (error) {
333 kprintf("ntfs_strategy: ntfs_writeattr fail\n");
334 bp->b_error = error;
335 bp->b_flags |= B_ERROR;
336 }
337 }
338 break;
339 default:
340 panic("ntfs: bad b_cmd %d", bp->b_cmd);
341 }
342 biodone(bio);
343 return (error);
344 }
345
346 /*
347 * ntfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
348 * struct ucred *a_cred)
349 */
350 static int
ntfs_write(struct vop_write_args * ap)351 ntfs_write(struct vop_write_args *ap)
352 {
353 struct vnode *vp = ap->a_vp;
354 struct fnode *fp = VTOF(vp);
355 struct ntnode *ip = FTONT(fp);
356 struct uio *uio = ap->a_uio;
357 struct ntfsmount *ntmp = ip->i_mp;
358 size_t towrite;
359 size_t written;
360 int error;
361
362 dprintf(("ntfs_write: ino: %ju, off: %u resid: %zd, segflg: %d\n",
363 (uintmax_t)ip->i_number, (uint32_t)uio->uio_offset,
364 uio->uio_resid, uio->uio_segflg));
365 dprintf(("ntfs_write: filesize: %ju ", (uintmax_t)fp->f_size));
366
367 if (uio->uio_resid + uio->uio_offset > fp->f_size) {
368 kprintf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n");
369 return (EFBIG);
370 }
371 if (uio->uio_offset > fp->f_size)
372 return (EFBIG);
373
374 towrite = szmin(uio->uio_resid, fp->f_size - uio->uio_offset);
375
376 dprintf((", towrite: %zd\n", towrite));
377
378 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
379 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio);
380 #ifdef NTFS_DEBUG
381 if (error)
382 kprintf("ntfs_write: ntfs_writeattr failed: %d\n", error);
383 #endif
384
385 return (error);
386 }
387
388 /*
389 * ntfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
390 */
391 int
ntfs_access(struct vop_access_args * ap)392 ntfs_access(struct vop_access_args *ap)
393 {
394 struct vnode *vp = ap->a_vp;
395 struct ntnode *ip = VTONT(vp);
396 struct ucred *cred = ap->a_cred;
397 mode_t mask, mode = ap->a_mode;
398 gid_t *gp;
399 int i;
400 #ifdef QUOTA
401 int error;
402 #endif
403
404 dprintf(("ntfs_access: %ju\n", (uintmax_t)ip->i_number));
405
406 /*
407 * Disallow write attempts on read-only file systems;
408 * unless the file is a socket, fifo, or a block or
409 * character device resident on the file system.
410 */
411 if (mode & VWRITE) {
412 switch ((int)vp->v_type) {
413 case VDIR:
414 case VLNK:
415 case VREG:
416 if (vp->v_mount->mnt_flag & MNT_RDONLY)
417 return (EROFS);
418 #ifdef QUOTA
419 if (error = getinoquota(ip))
420 return (error);
421 #endif
422 break;
423 }
424 }
425
426 /* Otherwise, user id 0 always gets access. */
427 if (cred->cr_uid == 0)
428 return (0);
429
430 mask = 0;
431
432 /* Otherwise, check the owner. */
433 if (cred->cr_uid == ip->i_mp->ntm_uid) {
434 if (mode & VEXEC)
435 mask |= S_IXUSR;
436 if (mode & VREAD)
437 mask |= S_IRUSR;
438 if (mode & VWRITE)
439 mask |= S_IWUSR;
440 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
441 }
442
443 /* Otherwise, check the groups. */
444 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
445 if (ip->i_mp->ntm_gid == *gp) {
446 if (mode & VEXEC)
447 mask |= S_IXGRP;
448 if (mode & VREAD)
449 mask |= S_IRGRP;
450 if (mode & VWRITE)
451 mask |= S_IWGRP;
452 return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES);
453 }
454
455 /* Otherwise, check everyone else. */
456 if (mode & VEXEC)
457 mask |= S_IXOTH;
458 if (mode & VREAD)
459 mask |= S_IROTH;
460 if (mode & VWRITE)
461 mask |= S_IWOTH;
462 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
463 }
464
465 /*
466 * Open called.
467 *
468 * Nothing to do.
469 *
470 * ntfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
471 * struct file *a_fp)
472 */
473 /* ARGSUSED */
474 static int
ntfs_open(struct vop_open_args * ap)475 ntfs_open(struct vop_open_args *ap)
476 {
477 return (vop_stdopen(ap));
478 }
479
480 /*
481 * Close called.
482 *
483 * Update the times on the inode.
484 *
485 * ntfs_close(struct vnode *a_vp, int a_fflag)
486 */
487 /* ARGSUSED */
488 static int
ntfs_close(struct vop_close_args * ap)489 ntfs_close(struct vop_close_args *ap)
490 {
491 #ifdef NTFS_DEBUG
492 struct vnode *vp = ap->a_vp;
493 struct ntnode *ip = VTONT(vp);
494
495 kprintf("ntfs_close: %ju\n", (uintmax_t)ip->i_number);
496 #endif
497
498 return (vop_stdclose(ap));
499 }
500
501 /*
502 * ntfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
503 * int *a_ncookies, off_t **cookies)
504 */
505 int
ntfs_readdir(struct vop_readdir_args * ap)506 ntfs_readdir(struct vop_readdir_args *ap)
507 {
508 struct vnode *vp = ap->a_vp;
509 struct fnode *fp = VTOF(vp);
510 struct ntnode *ip = FTONT(fp);
511 struct uio *uio = ap->a_uio;
512 struct ntfsmount *ntmp = ip->i_mp;
513 int i, j, error = 0;
514 wchar c;
515 u_int32_t faked = 0, num, off;
516 int ncookies = 0;
517 char convname[NTFS_MAXFILENAME + 1];
518
519 dprintf(("ntfs_readdir %ju off: %u resid: %zd\n",
520 (uintmax_t)ip->i_number, (uint32_t)uio->uio_offset,
521 uio->uio_resid));
522
523 if (uio->uio_offset < 0 || uio->uio_offset > INT_MAX)
524 return (EINVAL);
525 error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY | LK_FAILRECLAIM);
526 if (error)
527 return (error);
528
529 /*
530 * uio->uio_offset carries the number of the entry
531 * where we should start returning dirents.
532 *
533 * We fake up "." if we're not reading the FS root
534 * and we always fake up "..".
535 *
536 * off contains the entry we are starting at,
537 * num increments while we are reading.
538 */
539
540 off = num = uio->uio_offset;
541 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2;
542
543 /* Simulate . in every dir except ROOT */
544 if (ip->i_number != NTFS_ROOTINO && num == 0) {
545 if (vop_write_dirent(&error, uio, ip->i_number,
546 DT_DIR, 1, "."))
547 goto done;
548 if (error)
549 goto done;
550
551 num++;
552 ncookies++;
553 }
554
555 /* Simulate .. in every dir including ROOT */
556 if (num == faked - 1) {
557 /* XXX NTFS_ROOTINO seems to be wrong here */
558 if (vop_write_dirent(&error, uio, NTFS_ROOTINO,
559 DT_DIR, 2, ".."))
560 goto readdone;
561 if (error)
562 goto done;
563
564 num++;
565 ncookies++;
566 }
567
568 for (;;) {
569 struct attr_indexentry *iep;
570
571 /*
572 * num is the number of the entry we will return,
573 * but ntfs_ntreaddir takes the entry number of the
574 * ntfs directory listing, so subtract the faked
575 * . and .. entries.
576 */
577 error = ntfs_ntreaddir(ntmp, fp, num - faked, &iep);
578
579 if (error)
580 goto done;
581
582 if( NULL == iep )
583 break;
584
585 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST);
586 iep = NTFS_NEXTREC(iep, struct attr_indexentry *))
587 {
588 if(!ntfs_isnamepermitted(ntmp,iep))
589 continue;
590 for(i=0, j=0; i < iep->ie_fnamelen; i++, j++) {
591 c = NTFS_U28(iep->ie_fname[i]);
592 if (c&0xFF00)
593 convname[j++] = (char)(c>>8);
594 convname[j] = (char)c&0xFF;
595 }
596 convname[j] = '\0';
597 if (vop_write_dirent(&error, uio, iep->ie_number,
598 (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG,
599 j, convname))
600 goto readdone;
601
602 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, "
603 "flag: %d, %s\n",
604 ncookies, convname, iep->ie_fnametype,
605 iep->ie_flag,
606 (iep->ie_fflag & NTFS_FFLAG_DIR) ?
607 "dir" : "reg"));
608
609 if (error)
610 goto done;
611
612 ncookies++;
613 num++;
614 }
615 }
616
617 readdone:
618 uio->uio_offset = num;
619
620 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n",
621 ncookies,(u_int)(uio->uio_offset - off)));
622 dprintf(("ntfs_readdir: off: %u resid: %zd\n",
623 (uint32_t)uio->uio_offset, uio->uio_resid));
624
625 if (!error && ap->a_ncookies != NULL) {
626 off_t *cookies;
627 off_t *cookiep;
628
629 ddprintf(("ntfs_readdir: %d cookies\n",ncookies));
630 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
631 panic("ntfs_readdir: unexpected uio from NFS server");
632 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
633 cookiep = cookies;
634 while (off < num)
635 *cookiep++ = ++off;
636
637 *ap->a_ncookies = ncookies;
638 *ap->a_cookies = cookies;
639 }
640 /*
641 if (ap->a_eofflag)
642 *ap->a_eofflag = VTONT(vp)->i_size <= uio->uio_offset;
643 */
644 done:
645 vn_unlock(vp);
646 return (error);
647 }
648
649 /*
650 * ntfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
651 * struct componentname *a_cnp)
652 */
653 int
ntfs_lookup(struct vop_old_lookup_args * ap)654 ntfs_lookup(struct vop_old_lookup_args *ap)
655 {
656 struct vnode *dvp = ap->a_dvp;
657 struct ntnode *dip = VTONT(dvp);
658 struct ntfsmount *ntmp = dip->i_mp;
659 struct componentname *cnp = ap->a_cnp;
660 int error;
661 int lockparent = cnp->cn_flags & CNP_LOCKPARENT;
662 #ifdef NTFS_DEBUG
663 int wantparent = cnp->cn_flags & (CNP_LOCKPARENT | CNP_WANTPARENT);
664 #endif
665 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %ju, lp: %d, wp: %d \n",
666 (int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen,
667 (uintmax_t)dip->i_number, lockparent, wantparent));
668
669 *ap->a_vpp = NULL;
670
671 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
672 dprintf(("ntfs_lookup: faking . directory in %u\n",
673 (uint32_t)dip->i_number));
674
675 vref(dvp);
676 *ap->a_vpp = dvp;
677 error = 0;
678 } else if (cnp->cn_flags & CNP_ISDOTDOT) {
679 struct ntvattr *vap;
680
681 dprintf(("ntfs_lookup: faking .. directory in %d\n",
682 (uint32_t)dip->i_number));
683
684 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
685 if(error)
686 return (error);
687
688 VOP__UNLOCK(dvp, 0);
689 cnp->cn_flags |= CNP_PDIRUNLOCK;
690
691 dprintf(("ntfs_lookup: parentdir: %d\n",
692 vap->va_a_name->n_pnumber));
693 error = VFS_VGET(ntmp->ntm_mountp, NULL,
694 vap->va_a_name->n_pnumber,ap->a_vpp);
695 ntfs_ntvattrrele(vap);
696 if (error) {
697 if (VOP_LOCK(dvp, LK_EXCLUSIVE | LK_RETRY) == 0)
698 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
699 return (error);
700 }
701
702 if (lockparent) {
703 error = VOP_LOCK(dvp, LK_EXCLUSIVE);
704 if (error) {
705 vput(*ap->a_vpp);
706 *ap->a_vpp = NULL;
707 return (error);
708 }
709 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
710 }
711 } else {
712 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp);
713 if (error) {
714 dprintf(("ntfs_ntlookupfile: returned %d\n", error));
715 return (error);
716 }
717
718 dprintf(("ntfs_lookup: found ino: %u\n",
719 (uint32_t)VTONT(*ap->a_vpp)->i_number));
720
721 if (!lockparent) {
722 VOP__UNLOCK(dvp, 0);
723 cnp->cn_flags |= CNP_PDIRUNLOCK;
724 }
725 }
726 return (error);
727 }
728
729 /*
730 * Flush the blocks of a file to disk.
731 *
732 * This function is worthless for vnodes that represent directories. Maybe we
733 * could just do a sync if they try an fsync on a directory file.
734 *
735 * ntfs_fsync(struct vnode *a_vp, int a_waitfor)
736 */
737 static int
ntfs_fsync(struct vop_fsync_args * ap)738 ntfs_fsync(struct vop_fsync_args *ap)
739 {
740 return (0);
741 }
742
743 /*
744 * Return POSIX pathconf information applicable to NTFS filesystem
745 */
746 int
ntfs_pathconf(struct vop_pathconf_args * ap)747 ntfs_pathconf(struct vop_pathconf_args *ap)
748 {
749 switch (ap->a_name) {
750 case _PC_LINK_MAX:
751 *ap->a_retval = 1;
752 return (0);
753 case _PC_NAME_MAX:
754 *ap->a_retval = NTFS_MAXFILENAME;
755 return (0);
756 case _PC_PATH_MAX:
757 *ap->a_retval = PATH_MAX;
758 return (0);
759 case _PC_CHOWN_RESTRICTED:
760 *ap->a_retval = 1;
761 return (0);
762 case _PC_NO_TRUNC:
763 *ap->a_retval = 0;
764 return (0);
765 default:
766 return (EINVAL);
767 }
768 /* NOTREACHED */
769 }
770
771 /*
772 * Global vfs data structures
773 */
774 struct vop_ops ntfs_vnode_vops = {
775 .vop_default = vop_defaultop,
776 .vop_getattr = ntfs_getattr,
777 .vop_inactive = ntfs_inactive,
778 .vop_reclaim = ntfs_reclaim,
779 .vop_print = ntfs_print,
780 .vop_pathconf = ntfs_pathconf,
781 .vop_old_lookup = ntfs_lookup,
782 .vop_access = ntfs_access,
783 .vop_close = ntfs_close,
784 .vop_open = ntfs_open,
785 .vop_readdir = ntfs_readdir,
786 .vop_fsync = ntfs_fsync,
787 .vop_bmap = ntfs_bmap,
788 .vop_getpages = vop_stdgetpages,
789 .vop_putpages = vop_stdputpages,
790 .vop_strategy = ntfs_strategy,
791 .vop_read = ntfs_read,
792 .vop_write = ntfs_write
793 };
794
795