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 * 4. 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: releng/5.4/sys/fs/ntfs/ntfs_vnops.c 141090 2005-01-31 23:27:04Z imp $
35 *
36 */
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/time.h>
42 #include <sys/types.h>
43 #include <sys/stat.h>
44 #include <sys/vnode.h>
45 #include <sys/mount.h>
46 #include <sys/namei.h>
47 #include <sys/malloc.h>
48 #include <sys/bio.h>
49 #include <sys/buf.h>
50 #include <sys/dirent.h>
51
52 #include <vm/vm.h>
53 #include <vm/vm_param.h>
54 #include <vm/vm_page.h>
55 #include <vm/vm_object.h>
56 #include <vm/vm_pager.h>
57 #include <vm/vnode_pager.h>
58 #include <vm/vm_extern.h>
59
60 #include <sys/sysctl.h>
61
62 /*#define NTFS_DEBUG 1*/
63 #include <fs/ntfs/ntfs.h>
64 #include <fs/ntfs/ntfs_inode.h>
65 #include <fs/ntfs/ntfs_subr.h>
66
67 #include <sys/unistd.h> /* for pathconf(2) constants */
68
69 static int ntfs_read(struct vop_read_args *);
70 static int ntfs_write(struct vop_write_args *ap);
71 static int ntfs_getattr(struct vop_getattr_args *ap);
72 static int ntfs_inactive(struct vop_inactive_args *ap);
73 static int ntfs_reclaim(struct vop_reclaim_args *ap);
74 static int ntfs_bmap(struct vop_bmap_args *ap);
75 static int ntfs_strategy(struct vop_strategy_args *ap);
76 static int ntfs_access(struct vop_access_args *ap);
77 static int ntfs_open(struct vop_open_args *ap);
78 static int ntfs_close(struct vop_close_args *ap);
79 static int ntfs_readdir(struct vop_readdir_args *ap);
80 static int ntfs_lookup(struct vop_lookup_args *ap);
81 static int ntfs_fsync(struct vop_fsync_args *ap);
82 static int ntfs_pathconf(void *);
83
84 int ntfs_prtactive = 1; /* 1 => print out reclaim of active vnodes */
85
86 /*
87 * This is a noop, simply returning what one has been given.
88 */
89 int
90 ntfs_bmap(ap)
91 struct vop_bmap_args /* {
92 struct vnode *a_vp;
93 daddr_t a_bn;
94 struct vnode **a_vpp;
95 daddr_t *a_bnp;
96 int *a_runp;
97 int *a_runb;
98 } */ *ap;
99 {
100 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn));
101 if (ap->a_vpp != NULL)
102 *ap->a_vpp = ap->a_vp;
103 if (ap->a_bnp != NULL)
104 *ap->a_bnp = ap->a_bn;
105 if (ap->a_runp != NULL)
106 *ap->a_runp = 0;
107 if (ap->a_runb != NULL)
108 *ap->a_runb = 0;
109 return (0);
110 }
111
112 static int
113 ntfs_read(ap)
114 struct vop_read_args /* {
115 struct vnode *a_vp;
116 struct uio *a_uio;
117 int a_ioflag;
118 struct ucred *a_cred;
119 } */ *ap;
120 {
121 register struct vnode *vp = ap->a_vp;
122 register struct fnode *fp = VTOF(vp);
123 register struct ntnode *ip = FTONT(fp);
124 struct uio *uio = ap->a_uio;
125 struct ntfsmount *ntmp = ip->i_mp;
126 struct buf *bp;
127 daddr_t cn;
128 int resid, off, toread;
129 int error;
130
131 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));
132
133 dprintf(("ntfs_read: filesize: %d",(u_int32_t)fp->f_size));
134
135 /* don't allow reading after end of file */
136 if (uio->uio_offset > fp->f_size)
137 return (0);
138
139 resid = min(uio->uio_resid, fp->f_size - uio->uio_offset);
140
141 dprintf((", resid: %d\n", resid));
142
143 error = 0;
144 while (resid) {
145 cn = ntfs_btocn(uio->uio_offset);
146 off = ntfs_btocnoff(uio->uio_offset);
147
148 toread = min(off + resid, ntfs_cntob(1));
149
150 error = bread(vp, cn, ntfs_cntob(1), NOCRED, &bp);
151 if (error) {
152 brelse(bp);
153 break;
154 }
155
156 error = uiomove(bp->b_data + off, toread - off, uio);
157 if(error) {
158 brelse(bp);
159 break;
160 }
161 brelse(bp);
162
163 resid -= toread - off;
164 }
165
166 return (error);
167 }
168
169 static int
170 ntfs_getattr(ap)
171 struct vop_getattr_args /* {
172 struct vnode *a_vp;
173 struct vattr *a_vap;
174 struct ucred *a_cred;
175 struct thread *a_td;
176 } */ *ap;
177 {
178 register struct vnode *vp = ap->a_vp;
179 register struct fnode *fp = VTOF(vp);
180 register struct ntnode *ip = FTONT(fp);
181 register struct vattr *vap = ap->a_vap;
182
183 dprintf(("ntfs_getattr: %d, flags: %d\n",ip->i_number,ip->i_flag));
184
185 vap->va_fsid = dev2udev(ip->i_dev);
186 vap->va_fileid = ip->i_number;
187 vap->va_mode = ip->i_mp->ntm_mode;
188 vap->va_nlink = ip->i_nlink;
189 vap->va_uid = ip->i_mp->ntm_uid;
190 vap->va_gid = ip->i_mp->ntm_gid;
191 vap->va_rdev = 0; /* XXX UNODEV ? */
192 vap->va_size = fp->f_size;
193 vap->va_bytes = fp->f_allocated;
194 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access);
195 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write);
196 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create);
197 vap->va_flags = ip->i_flag;
198 vap->va_gen = 0;
199 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps;
200 vap->va_type = vp->v_type;
201 vap->va_filerev = 0;
202 return (0);
203 }
204
205 /*
206 * Last reference to an ntnode. If necessary, write or delete it.
207 */
208 int
209 ntfs_inactive(ap)
210 struct vop_inactive_args /* {
211 struct vnode *a_vp;
212 } */ *ap;
213 {
214 register struct vnode *vp = ap->a_vp;
215 #ifdef NTFS_DEBUG
216 register struct ntnode *ip = VTONT(vp);
217 #endif
218
219 dprintf(("ntfs_inactive: vnode: %p, ntnode: %d\n", vp, ip->i_number));
220
221 if (ntfs_prtactive && vrefcnt(vp) != 0)
222 vprint("ntfs_inactive: pushing active", vp);
223
224 VOP_UNLOCK(vp, 0, ap->a_td);
225
226 /* XXX since we don't support any filesystem changes
227 * right now, nothing more needs to be done
228 */
229 return (0);
230 }
231
232 /*
233 * Reclaim an fnode/ntnode so that it can be used for other purposes.
234 */
235 int
236 ntfs_reclaim(ap)
237 struct vop_reclaim_args /* {
238 struct vnode *a_vp;
239 } */ *ap;
240 {
241 register struct vnode *vp = ap->a_vp;
242 register struct fnode *fp = VTOF(vp);
243 register struct ntnode *ip = FTONT(fp);
244 int error;
245
246 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %d\n", vp, ip->i_number));
247
248 if (ntfs_prtactive && vrefcnt(vp) != 0)
249 vprint("ntfs_reclaim: pushing active", vp);
250
251 if ((error = ntfs_ntget(ip)) != 0)
252 return (error);
253
254 /* Purge old data structures associated with the inode. */
255 ntfs_frele(fp);
256 ntfs_ntput(ip);
257 vp->v_data = NULL;
258
259 return (0);
260 }
261
262 /*
263 * Calculate the logical to physical mapping if not done already,
264 * then call the device strategy routine.
265 */
266 int
267 ntfs_strategy(ap)
268 struct vop_strategy_args /* {
269 struct buf *a_bp;
270 } */ *ap;
271 {
272 register struct buf *bp = ap->a_bp;
273 register struct vnode *vp = bp->b_vp;
274 register struct fnode *fp = VTOF(vp);
275 register struct ntnode *ip = FTONT(fp);
276 struct ntfsmount *ntmp = ip->i_mp;
277 int error;
278
279 KASSERT(ap->a_vp == ap->a_bp->b_vp, ("%s(%p != %p)",
280 __func__, ap->a_vp, ap->a_bp->b_vp));
281 dprintf(("ntfs_strategy: offset: %d, blkno: %d, lblkno: %d\n",
282 (u_int32_t)bp->b_offset,(u_int32_t)bp->b_blkno,
283 (u_int32_t)bp->b_lblkno));
284
285 dprintf(("strategy: bcount: %d flags: 0x%lx\n",
286 (u_int32_t)bp->b_bcount,bp->b_flags));
287
288 if (bp->b_iocmd == BIO_READ) {
289 u_int32_t toread;
290
291 if (ntfs_cntob(bp->b_blkno) >= fp->f_size) {
292 clrbuf(bp);
293 error = 0;
294 } else {
295 toread = min(bp->b_bcount,
296 fp->f_size-ntfs_cntob(bp->b_blkno));
297 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n",
298 toread,(u_int32_t)fp->f_size));
299
300 error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
301 fp->f_attrname, ntfs_cntob(bp->b_blkno),
302 toread, bp->b_data, NULL);
303
304 if (error) {
305 printf("ntfs_strategy: ntfs_readattr failed\n");
306 bp->b_error = error;
307 bp->b_ioflags |= BIO_ERROR;
308 }
309
310 bzero(bp->b_data + toread, bp->b_bcount - toread);
311 }
312 } else {
313 size_t tmp;
314 u_int32_t towrite;
315
316 if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) {
317 printf("ntfs_strategy: CAN'T EXTEND FILE\n");
318 bp->b_error = error = EFBIG;
319 bp->b_ioflags |= BIO_ERROR;
320 } else {
321 towrite = min(bp->b_bcount,
322 fp->f_size-ntfs_cntob(bp->b_blkno));
323 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n",
324 towrite,(u_int32_t)fp->f_size));
325
326 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
327 fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite,
328 bp->b_data, &tmp, NULL);
329
330 if (error) {
331 printf("ntfs_strategy: ntfs_writeattr fail\n");
332 bp->b_error = error;
333 bp->b_ioflags |= BIO_ERROR;
334 }
335 }
336 }
337 bufdone(bp);
338 return (error);
339 }
340
341 static int
342 ntfs_write(ap)
343 struct vop_write_args /* {
344 struct vnode *a_vp;
345 struct uio *a_uio;
346 int a_ioflag;
347 struct ucred *a_cred;
348 } */ *ap;
349 {
350 register struct vnode *vp = ap->a_vp;
351 register struct fnode *fp = VTOF(vp);
352 register struct ntnode *ip = FTONT(fp);
353 struct uio *uio = ap->a_uio;
354 struct ntfsmount *ntmp = ip->i_mp;
355 u_int64_t towrite;
356 size_t written;
357 int error;
358
359 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));
360 dprintf(("ntfs_write: filesize: %d",(u_int32_t)fp->f_size));
361
362 if (uio->uio_resid + uio->uio_offset > fp->f_size) {
363 printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n");
364 return (EFBIG);
365 }
366
367 towrite = min(uio->uio_resid, fp->f_size - uio->uio_offset);
368
369 dprintf((", towrite: %d\n",(u_int32_t)towrite));
370
371 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
372 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio);
373 #ifdef NTFS_DEBUG
374 if (error)
375 printf("ntfs_write: ntfs_writeattr failed: %d\n", error);
376 #endif
377
378 return (error);
379 }
380
381 int
382 ntfs_access(ap)
383 struct vop_access_args /* {
384 struct vnode *a_vp;
385 int a_mode;
386 struct ucred *a_cred;
387 struct thread *a_td;
388 } */ *ap;
389 {
390 struct vnode *vp = ap->a_vp;
391 struct ntnode *ip = VTONT(vp);
392 mode_t mode = ap->a_mode;
393 #ifdef QUOTA
394 int error;
395 #endif
396
397 dprintf(("ntfs_access: %d\n",ip->i_number));
398
399 /*
400 * Disallow write attempts on read-only filesystems;
401 * unless the file is a socket, fifo, or a block or
402 * character device resident on the filesystem.
403 */
404 if (mode & VWRITE) {
405 switch ((int)vp->v_type) {
406 case VDIR:
407 case VLNK:
408 case VREG:
409 if (vp->v_mount->mnt_flag & MNT_RDONLY)
410 return (EROFS);
411 #ifdef QUOTA
412 if (error = getinoquota(ip))
413 return (error);
414 #endif
415 break;
416 }
417 }
418
419 return (vaccess(vp->v_type, ip->i_mp->ntm_mode, ip->i_mp->ntm_uid,
420 ip->i_mp->ntm_gid, ap->a_mode, ap->a_cred, NULL));
421 }
422
423 /*
424 * Open called.
425 *
426 * Nothing to do.
427 */
428 /* ARGSUSED */
429 static int
430 ntfs_open(ap)
431 struct vop_open_args /* {
432 struct vnode *a_vp;
433 int a_mode;
434 struct ucred *a_cred;
435 struct thread *a_td;
436 } */ *ap;
437 {
438 #if NTFS_DEBUG
439 register struct vnode *vp = ap->a_vp;
440 register struct ntnode *ip = VTONT(vp);
441
442 printf("ntfs_open: %d\n",ip->i_number);
443 #endif
444
445 /*
446 * Files marked append-only must be opened for appending.
447 */
448
449 return (0);
450 }
451
452 /*
453 * Close called.
454 *
455 * Update the times on the inode.
456 */
457 /* ARGSUSED */
458 static int
459 ntfs_close(ap)
460 struct vop_close_args /* {
461 struct vnode *a_vp;
462 int a_fflag;
463 struct ucred *a_cred;
464 struct thread *a_td;
465 } */ *ap;
466 {
467 #if NTFS_DEBUG
468 register struct vnode *vp = ap->a_vp;
469 register struct ntnode *ip = VTONT(vp);
470
471 printf("ntfs_close: %d\n",ip->i_number);
472 #endif
473
474 return (0);
475 }
476
477 int
478 ntfs_readdir(ap)
479 struct vop_readdir_args /* {
480 struct vnode *a_vp;
481 struct uio *a_uio;
482 struct ucred *a_cred;
483 int *a_ncookies;
484 u_int **cookies;
485 } */ *ap;
486 {
487 register struct vnode *vp = ap->a_vp;
488 register struct fnode *fp = VTOF(vp);
489 register struct ntnode *ip = FTONT(fp);
490 struct uio *uio = ap->a_uio;
491 struct ntfsmount *ntmp = ip->i_mp;
492 int i, j, error = 0;
493 wchar c;
494 u_int32_t faked = 0, num;
495 int ncookies = 0;
496 struct dirent cde;
497 off_t off;
498
499 dprintf(("ntfs_readdir %d off: %d resid: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid));
500
501 off = uio->uio_offset;
502
503 /* Simulate . in every dir except ROOT */
504 if( ip->i_number != NTFS_ROOTINO ) {
505 struct dirent dot = { NTFS_ROOTINO,
506 sizeof(struct dirent), DT_DIR, 1, "." };
507
508 if( uio->uio_offset < sizeof(struct dirent) ) {
509 dot.d_fileno = ip->i_number;
510 error = uiomove((char *)&dot,sizeof(struct dirent),uio);
511 if(error)
512 return (error);
513
514 ncookies ++;
515 }
516 }
517
518 /* Simulate .. in every dir including ROOT */
519 if( uio->uio_offset < 2 * sizeof(struct dirent) ) {
520 struct dirent dotdot = { NTFS_ROOTINO,
521 sizeof(struct dirent), DT_DIR, 2, ".." };
522
523 error = uiomove((char *)&dotdot,sizeof(struct dirent),uio);
524 if(error)
525 return (error);
526
527 ncookies ++;
528 }
529
530 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2;
531 num = uio->uio_offset / sizeof(struct dirent) - faked;
532
533 while( uio->uio_resid >= sizeof(struct dirent) ) {
534 struct attr_indexentry *iep;
535
536 error = ntfs_ntreaddir(ntmp, fp, num, &iep);
537
538 if(error)
539 return (error);
540
541 if( NULL == iep )
542 break;
543
544 for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent));
545 iep = NTFS_NEXTREC(iep, struct attr_indexentry *))
546 {
547 if(!ntfs_isnamepermitted(ntmp,iep))
548 continue;
549
550 for(i=0, j=0; i<iep->ie_fnamelen; i++, j++) {
551 c = NTFS_U28(iep->ie_fname[i]);
552 if (c&0xFF00)
553 cde.d_name[j++] = (char)(c>>8);
554 cde.d_name[j] = (char)c&0xFF;
555 }
556 cde.d_name[j] = '\0';
557 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, ",
558 num, cde.d_name, iep->ie_fnametype,
559 iep->ie_flag));
560 cde.d_namlen = j;
561 cde.d_fileno = iep->ie_number;
562 cde.d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG;
563 cde.d_reclen = sizeof(struct dirent);
564 dprintf(("%s\n", (cde.d_type == DT_DIR) ? "dir":"reg"));
565
566 error = uiomove((char *)&cde, sizeof(struct dirent), uio);
567 if(error)
568 return (error);
569
570 ncookies++;
571 num++;
572 }
573 }
574
575 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n",
576 ncookies,(u_int)(uio->uio_offset - off)));
577 dprintf(("ntfs_readdir: off: %d resid: %d\n",
578 (u_int32_t)uio->uio_offset,uio->uio_resid));
579
580 if (!error && ap->a_ncookies != NULL) {
581 struct dirent* dpStart;
582 struct dirent* dp;
583 u_long *cookies;
584 u_long *cookiep;
585
586 ddprintf(("ntfs_readdir: %d cookies\n",ncookies));
587 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
588 panic("ntfs_readdir: unexpected uio from NFS server");
589 dpStart = (struct dirent *)
590 ((caddr_t)uio->uio_iov->iov_base -
591 (uio->uio_offset - off));
592 MALLOC(cookies, u_long *, ncookies * sizeof(u_long),
593 M_TEMP, M_WAITOK);
594 for (dp = dpStart, cookiep = cookies, i=0;
595 i < ncookies;
596 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen), i++) {
597 off += dp->d_reclen;
598 *cookiep++ = (u_int) off;
599 }
600 *ap->a_ncookies = ncookies;
601 *ap->a_cookies = cookies;
602 }
603 /*
604 if (ap->a_eofflag)
605 *ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset;
606 */
607 return (error);
608 }
609
610 int
611 ntfs_lookup(ap)
612 struct vop_lookup_args /* {
613 struct vnode *a_dvp;
614 struct vnode **a_vpp;
615 struct componentname *a_cnp;
616 } */ *ap;
617 {
618 register struct vnode *dvp = ap->a_dvp;
619 register struct ntnode *dip = VTONT(dvp);
620 struct ntfsmount *ntmp = dip->i_mp;
621 struct componentname *cnp = ap->a_cnp;
622 struct ucred *cred = cnp->cn_cred;
623 int error;
624 int lockparent = cnp->cn_flags & LOCKPARENT;
625 #if NTFS_DEBUG
626 int wantparent = cnp->cn_flags & (LOCKPARENT|WANTPARENT);
627 #endif
628 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %d, lp: %d, wp: %d \n",
629 (int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen,
630 dip->i_number, lockparent, wantparent));
631
632 error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_thread);
633 if(error)
634 return (error);
635
636 if ((cnp->cn_flags & ISLASTCN) &&
637 (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
638 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
639 return (EROFS);
640
641 if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
642 dprintf(("ntfs_lookup: faking . directory in %d\n",
643 dip->i_number));
644
645 VREF(dvp);
646 *ap->a_vpp = dvp;
647 error = 0;
648 } else if (cnp->cn_flags & ISDOTDOT) {
649 struct ntvattr *vap;
650
651 dprintf(("ntfs_lookup: faking .. directory in %d\n",
652 dip->i_number));
653
654 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
655 if(error)
656 return (error);
657
658 VOP_UNLOCK(dvp,0,cnp->cn_thread);
659 cnp->cn_flags |= PDIRUNLOCK;
660
661 dprintf(("ntfs_lookup: parentdir: %d\n",
662 vap->va_a_name->n_pnumber));
663 error = VFS_VGET(ntmp->ntm_mountp, vap->va_a_name->n_pnumber,
664 LK_EXCLUSIVE, ap->a_vpp);
665 ntfs_ntvattrrele(vap);
666 if (error) {
667 if (vn_lock(dvp,LK_EXCLUSIVE|LK_RETRY,cnp->cn_thread)==0)
668 cnp->cn_flags &= ~PDIRUNLOCK;
669 return (error);
670 }
671
672 if (lockparent && (cnp->cn_flags & ISLASTCN)) {
673 error = vn_lock(dvp, LK_EXCLUSIVE, cnp->cn_thread);
674 if (error) {
675 vput( *(ap->a_vpp) );
676 return (error);
677 }
678 cnp->cn_flags &= ~PDIRUNLOCK;
679 }
680 } else {
681 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp);
682 if (error) {
683 dprintf(("ntfs_ntlookupfile: returned %d\n", error));
684 return (error);
685 }
686
687 dprintf(("ntfs_lookup: found ino: %d\n",
688 VTONT(*ap->a_vpp)->i_number));
689
690 if(!lockparent || !(cnp->cn_flags & ISLASTCN))
691 VOP_UNLOCK(dvp, 0, cnp->cn_thread);
692 }
693
694 if (cnp->cn_flags & MAKEENTRY)
695 cache_enter(dvp, *ap->a_vpp, cnp);
696
697 return (error);
698 }
699
700 /*
701 * Flush the blocks of a file to disk.
702 *
703 * This function is worthless for vnodes that represent directories. Maybe we
704 * could just do a sync if they try an fsync on a directory file.
705 */
706 static int
707 ntfs_fsync(ap)
708 struct vop_fsync_args /* {
709 struct vnode *a_vp;
710 struct ucred *a_cred;
711 int a_waitfor;
712 struct thread *a_td;
713 } */ *ap;
714 {
715 return (0);
716 }
717
718 /*
719 * Return POSIX pathconf information applicable to NTFS filesystem
720 */
721 int
722 ntfs_pathconf(v)
723 void *v;
724 {
725 struct vop_pathconf_args /* {
726 struct vnode *a_vp;
727 int a_name;
728 register_t *a_retval;
729 } */ *ap = v;
730
731 switch (ap->a_name) {
732 case _PC_LINK_MAX:
733 *ap->a_retval = 1;
734 return (0);
735 case _PC_NAME_MAX:
736 *ap->a_retval = NTFS_MAXFILENAME;
737 return (0);
738 case _PC_PATH_MAX:
739 *ap->a_retval = PATH_MAX;
740 return (0);
741 case _PC_CHOWN_RESTRICTED:
742 *ap->a_retval = 1;
743 return (0);
744 case _PC_NO_TRUNC:
745 *ap->a_retval = 0;
746 return (0);
747 default:
748 return (EINVAL);
749 }
750 /* NOTREACHED */
751 }
752
753 /*
754 * Global vfs data structures
755 */
756 vop_t **ntfs_vnodeop_p;
757 static
758 struct vnodeopv_entry_desc ntfs_vnodeop_entries[] = {
759 { &vop_default_desc, (vop_t *)vop_defaultop },
760
761 { &vop_getattr_desc, (vop_t *)ntfs_getattr },
762 { &vop_inactive_desc, (vop_t *)ntfs_inactive },
763 { &vop_reclaim_desc, (vop_t *)ntfs_reclaim },
764 { &vop_pathconf_desc, ntfs_pathconf },
765
766 { &vop_cachedlookup_desc, (vop_t *)ntfs_lookup },
767 { &vop_lookup_desc, (vop_t *)vfs_cache_lookup },
768
769 { &vop_access_desc, (vop_t *)ntfs_access },
770 { &vop_close_desc, (vop_t *)ntfs_close },
771 { &vop_open_desc, (vop_t *)ntfs_open },
772 { &vop_readdir_desc, (vop_t *)ntfs_readdir },
773 { &vop_fsync_desc, (vop_t *)ntfs_fsync },
774
775 { &vop_bmap_desc, (vop_t *)ntfs_bmap },
776 { &vop_strategy_desc, (vop_t *)ntfs_strategy },
777 { &vop_read_desc, (vop_t *)ntfs_read },
778 { &vop_write_desc, (vop_t *)ntfs_write },
779
780 { NULL, NULL }
781 };
782
783 static
784 struct vnodeopv_desc ntfs_vnodeop_opv_desc =
785 { &ntfs_vnodeop_p, ntfs_vnodeop_entries };
786
787 VNODEOP_SET(ntfs_vnodeop_opv_desc);
Cache object: 286fea79f2a17a9ca8ed33805f3d8076
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