1/* $NetBSD: ntfs_vnops.c,v 1.60 2016/08/20 12:37:07 hannken 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 * Id: ntfs_vnops.c,v 1.5 1999/05/12 09:43:06 semenu Exp
35 *
36 */
37
38#include <sys/cdefs.h>
39__KERNEL_RCSID(0, "$NetBSD: ntfs_vnops.c,v 1.60 2016/08/20 12:37:07 hannken Exp $");
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/kernel.h>
44#include <sys/time.h>
45#include <sys/stat.h>
46#include <sys/vnode.h>
47#include <sys/mount.h>
48#include <sys/namei.h>
49#include <sys/malloc.h>
50#include <sys/buf.h>
51#include <sys/dirent.h>
52#include <sys/kauth.h>
53#include <sys/sysctl.h>
54
55
56#include <fs/ntfs/ntfs.h>
57#include <fs/ntfs/ntfs_inode.h>
58#include <fs/ntfs/ntfs_subr.h>
59#include <fs/ntfs/ntfs_vfsops.h>
60#include <miscfs/specfs/specdev.h>
61#include <miscfs/genfs/genfs.h>
62
63#include <sys/unistd.h> /* for pathconf(2) constants */
64
65static int ntfs_bypass(void *);
66static int ntfs_read(void *);
67static int ntfs_write(void *);
68static int ntfs_getattr(void *);
69static int ntfs_inactive(void *);
70static int ntfs_print(void *);
71static int ntfs_reclaim(void *);
72static int ntfs_strategy(void *);
73static int ntfs_access(void *);
74static int ntfs_open(void *);
75static int ntfs_close(void *);
76static int ntfs_readdir(void *);
77static int ntfs_lookup(void *);
78static int ntfs_bmap(void *);
79static int ntfs_fsync(void *);
80static int ntfs_pathconf(void *);
81
82extern int prtactive;
83
84/*
85 * This is a noop, simply returning what one has been given.
86 */
87int
88ntfs_bmap(void *v)
89{
90 struct vop_bmap_args /* {
91 struct vnode *a_vp;
92 daddr_t a_bn;
93 struct vnode **a_vpp;
94 daddr_t *a_bnp;
95 int *a_runp;
96 int *a_runb;
97 } */ *ap = v;
98 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn));
99 if (ap->a_vpp != NULL)
100 *ap->a_vpp = ap->a_vp;
101 if (ap->a_bnp != NULL)
102 *ap->a_bnp = ap->a_bn;
103 if (ap->a_runp != NULL)
104 *ap->a_runp = 0;
105 return (0);
106}
107
108static int
109ntfs_read(void *v)
110{
111 struct vop_read_args /* {
112 struct vnode *a_vp;
113 struct uio *a_uio;
114 int a_ioflag;
115 kauth_cred_t a_cred;
116 } */ *ap = v;
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 u_int64_t toread;
123 int error;
124
125 dprintf(("ntfs_read: ino: %llu, off: %qd resid: %qd\n",
126 (unsigned long long)ip->i_number, (long long)uio->uio_offset,
127 (long long)uio->uio_resid));
128
129 dprintf(("ntfs_read: filesize: %qu",(long long)fp->f_size));
130
131 /* don't allow reading after end of file */
132 if (uio->uio_offset > fp->f_size)
133 toread = 0;
134 else
135 toread = MIN(uio->uio_resid, fp->f_size - uio->uio_offset );
136
137 dprintf((", toread: %qu\n",(long long)toread));
138
139 if (toread == 0)
140 return (0);
141
142 error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
143 fp->f_attrname, uio->uio_offset, toread, NULL, uio);
144 if (error) {
145 printf("ntfs_read: ntfs_readattr failed: %d\n",error);
146 return (error);
147 }
148
149 return (0);
150}
151
152static int
153ntfs_bypass(void *v)
154{
155 struct vop_generic_args /* {
156 struct vnodeop_desc *a_desc;
157 <other random data follows, presumably>
158 } */ *ap __unused = v;
159 int error = ENOTTY;
160 dprintf(("ntfs_bypass: %s\n", ap->a_desc->vdesc_name));
161 return (error);
162}
163
164
165static int
166ntfs_getattr(void *v)
167{
168 struct vop_getattr_args /* {
169 struct vnode *a_vp;
170 struct vattr *a_vap;
171 kauth_cred_t a_cred;
172 } */ *ap = v;
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: %llu, flags: %d\n",
179 (unsigned long long)ip->i_number, ip->i_flag));
180
181 vap->va_fsid = 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_rdev = 0; /* XXX UNODEV ? */
188 vap->va_size = fp->f_size;
189 vap->va_bytes = fp->f_allocated;
190 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access);
191 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write);
192 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create);
193 vap->va_flags = ip->i_flag;
194 vap->va_gen = 0;
195 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps;
196 vap->va_type = vp->v_type;
197 vap->va_filerev = 0;
198 return (0);
199}
200
201
202/*
203 * Last reference to an ntnode. If necessary, write or delete it.
204 */
205int
206ntfs_inactive(void *v)
207{
208 struct vop_inactive_args /* {
209 struct vnode *a_vp;
210 } */ *ap = v;
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: %llu\n", vp,
217 (unsigned long long)ip->i_number));
218
219 VOP_UNLOCK(vp);
220
221 /* XXX since we don't support any filesystem changes
222 * right now, nothing more needs to be done
223 */
224 return (0);
225}
226
227/*
228 * Reclaim an fnode/ntnode so that it can be used for other purposes.
229 */
230int
231ntfs_reclaim(void *v)
232{
233 struct vop_reclaim_args /* {
234 struct vnode *a_vp;
235 } */ *ap = v;
236 struct vnode *vp = ap->a_vp;
237 struct fnode *fp = VTOF(vp);
238 struct ntnode *ip = FTONT(fp);
239 const int attrlen = strlen(fp->f_attrname);
240 int error;
241
242 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %llu\n", vp,
243 (unsigned long long)ip->i_number));
244
245 if (prtactive && vp->v_usecount > 1)
246 vprint("ntfs_reclaim: pushing active", vp);
247
248 if ((error = ntfs_ntget(ip)) != 0)
249 return (error);
250
251 if (ip->i_devvp) {
252 vrele(ip->i_devvp);
253 ip->i_devvp = NULL;
254 }
255 genfs_node_destroy(vp);
256 vp->v_data = NULL;
257
258 /* Destroy fnode. */
259 if (fp->f_key != &fp->f_smallkey)
260 kmem_free(fp->f_key, NTKEY_SIZE(attrlen));
261 if (fp->f_dirblbuf)
262 free(fp->f_dirblbuf, M_NTFSDIR);
263 kmem_free(fp, sizeof(*fp));
264 ntfs_ntrele(ip);
265
266 ntfs_ntput(ip);
267
268 return (0);
269}
270
271static int
272ntfs_print(void *v)
273{
274 struct vop_print_args /* {
275 struct vnode *a_vp;
276 } */ *ap = v;
277 struct ntnode *ip = VTONT(ap->a_vp);
278
279 printf("tag VT_NTFS, ino %llu, flag %#x, usecount %d, nlink %ld\n",
280 (unsigned long long)ip->i_number, ip->i_flag, ip->i_usecount,
281 ip->i_nlink);
282 printf(" ");
283 printf("\n");
284 return (0);
285}
286
287/*
288 * Calculate the logical to physical mapping if not done already,
289 * then call the device strategy routine.
290 */
291int
292ntfs_strategy(void *v)
293{
294 struct vop_strategy_args /* {
295 struct vnode *a_vp;
296 struct buf *a_bp;
297 } */ *ap = v;
298 struct buf *bp = ap->a_bp;
299 struct vnode *vp = ap->a_vp;
300 struct fnode *fp = VTOF(vp);
301 struct ntnode *ip = FTONT(fp);
302 struct ntfsmount *ntmp = ip->i_mp;
303 int error;
304
305 dprintf(("ntfs_strategy: blkno: %d, lblkno: %d\n",
306 (u_int32_t)bp->b_blkno,
307 (u_int32_t)bp->b_lblkno));
308
309 dprintf(("strategy: bcount: %u flags: 0x%x\n",
310 (u_int32_t)bp->b_bcount,bp->b_flags));
311
312 if (bp->b_flags & B_READ) {
313 u_int32_t toread;
314
315 if (ntfs_cntob(bp->b_blkno) >= fp->f_size) {
316 clrbuf(bp);
317 error = 0;
318 } else {
319 toread = MIN(bp->b_bcount,
320 fp->f_size - ntfs_cntob(bp->b_blkno));
321 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n",
322 toread,(u_int32_t)fp->f_size));
323
324 error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
325 fp->f_attrname, ntfs_cntob(bp->b_blkno),
326 toread, bp->b_data, NULL);
327
328 if (error) {
329 printf("ntfs_strategy: ntfs_readattr failed\n");
330 bp->b_error = error;
331 }
332
333 memset((char *)bp->b_data + toread, 0,
334 bp->b_bcount - toread);
335 }
336 } else {
337 size_t tmp;
338 u_int32_t towrite;
339
340 if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) {
341 printf("ntfs_strategy: CAN'T EXTEND FILE\n");
342 bp->b_error = error = EFBIG;
343 } else {
344 towrite = MIN(bp->b_bcount,
345 fp->f_size - ntfs_cntob(bp->b_blkno));
346 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n",
347 towrite,(u_int32_t)fp->f_size));
348
349 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
350 fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite,
351 bp->b_data, &tmp, NULL);
352
353 if (error) {
354 printf("ntfs_strategy: ntfs_writeattr fail\n");
355 bp->b_error = error;
356 }
357 }
358 }
359 biodone(bp);
360 return (error);
361}
362
363static int
364ntfs_write(void *v)
365{
366 struct vop_write_args /* {
367 struct vnode *a_vp;
368 struct uio *a_uio;
369 int a_ioflag;
370 kauth_cred_t a_cred;
371 } */ *ap = v;
372 struct vnode *vp = ap->a_vp;
373 struct fnode *fp = VTOF(vp);
374 struct ntnode *ip = FTONT(fp);
375 struct uio *uio = ap->a_uio;
376 struct ntfsmount *ntmp = ip->i_mp;
377 u_int64_t towrite;
378 size_t written;
379 int error;
380
381 dprintf(("ntfs_write: ino: %llu, off: %qd resid: %qd\n",
382 (unsigned long long)ip->i_number, (long long)uio->uio_offset,
383 (long long)uio->uio_resid));
384 dprintf(("ntfs_write: filesize: %qu",(long long)fp->f_size));
385
386 if (uio->uio_resid + uio->uio_offset > fp->f_size) {
387 printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n");
388 return (EFBIG);
389 }
390
391 towrite = MIN(uio->uio_resid, fp->f_size - uio->uio_offset);
392
393 dprintf((", towrite: %qu\n",(long long)towrite));
394
395 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
396 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio);
397#ifdef NTFS_DEBUG
398 if (error)
399 printf("ntfs_write: ntfs_writeattr failed: %d\n", error);
400#endif
401
402 return (error);
403}
404
405static int
406ntfs_check_possible(struct vnode *vp, struct ntnode *ip, mode_t mode)
407{
408
409 /*
410 * Disallow write attempts on read-only file systems;
411 * unless the file is a socket, fifo, or a block or
412 * character device resident on the file system.
413 */
414 if (mode & VWRITE) {
415 switch ((int)vp->v_type) {
416 case VDIR:
417 case VLNK:
418 case VREG:
419 if (vp->v_mount->mnt_flag & MNT_RDONLY)
420 return (EROFS);
421 break;
422 }
423 }
424
425 return 0;
426}
427
428static int
429ntfs_check_permitted(struct vnode *vp, struct ntnode *ip, mode_t mode,
430 kauth_cred_t cred)
431{
432 mode_t file_mode;
433
434 file_mode = ip->i_mp->ntm_mode | (S_IXUSR|S_IXGRP|S_IXOTH);
435
436 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, vp->v_type,
437 file_mode), vp, NULL, genfs_can_access(vp->v_type, file_mode,
438 ip->i_mp->ntm_uid, ip->i_mp->ntm_gid, mode, cred));
439}
440
441int
442ntfs_access(void *v)
443{
444 struct vop_access_args /* {
445 struct vnode *a_vp;
446 int a_mode;
447 kauth_cred_t a_cred;
448 } */ *ap = v;
449 struct vnode *vp = ap->a_vp;
450 struct ntnode *ip = VTONT(vp);
451 int error;
452
453 dprintf(("ntfs_access: %llu\n", (unsigned long long)ip->i_number));
454
455 error = ntfs_check_possible(vp, ip, ap->a_mode);
456 if (error)
457 return error;
458
459 error = ntfs_check_permitted(vp, ip, ap->a_mode, ap->a_cred);
460
461 return error;
462}
463
464/*
465 * Open called.
466 *
467 * Nothing to do.
468 */
469/* ARGSUSED */
470static int
471ntfs_open(void *v)
472{
473 struct vop_open_args /* {
474 struct vnode *a_vp;
475 int a_mode;
476 kauth_cred_t a_cred;
477 } */ *ap __unused = v;
478#ifdef NTFS_DEBUG
479 struct vnode *vp = ap->a_vp;
480 struct ntnode *ip = VTONT(vp);
481
482 dprintf(("ntfs_open: %llu\n", (unsigned long long)ip->i_number));
483#endif
484
485 /*
486 * Files marked append-only must be opened for appending.
487 */
488
489 return (0);
490}
491
492/*
493 * Close called.
494 *
495 * Update the times on the inode.
496 */
497/* ARGSUSED */
498static int
499ntfs_close(void *v)
500{
501 struct vop_close_args /* {
502 struct vnode *a_vp;
503 int a_fflag;
504 kauth_cred_t a_cred;
505 } */ *ap __unused = v;
506#ifdef NTFS_DEBUG
507 struct vnode *vp = ap->a_vp;
508 struct ntnode *ip = VTONT(vp);
509
510 dprintf(("ntfs_close: %llu\n", (unsigned long long)ip->i_number));
511#endif
512
513 return (0);
514}
515
516int
517ntfs_readdir(void *v)
518{
519 struct vop_readdir_args /* {
520 struct vnode *a_vp;
521 struct uio *a_uio;
522 kauth_cred_t a_cred;
523 int *a_ncookies;
524 u_int **cookies;
525 } */ *ap = v;
526 struct vnode *vp = ap->a_vp;
527 struct fnode *fp = VTOF(vp);
528 struct ntnode *ip = FTONT(fp);
529 struct uio *uio = ap->a_uio;
530 struct ntfsmount *ntmp = ip->i_mp;
531 int i, error = 0;
532 u_int32_t faked = 0, num;
533 int ncookies = 0;
534 struct dirent *cde;
535 off_t off;
536
537 dprintf(("ntfs_readdir %llu off: %qd resid: %qd\n",
538 (unsigned long long)ip->i_number, (long long)uio->uio_offset,
539 (long long)uio->uio_resid));
540
541 off = uio->uio_offset;
542
543 cde = malloc(sizeof(struct dirent), M_TEMP, M_WAITOK);
544
545 /* Simulate . in every dir except ROOT */
546 if (ip->i_number != NTFS_ROOTINO
547 && uio->uio_offset < sizeof(struct dirent)) {
548 cde->d_fileno = ip->i_number;
549 cde->d_reclen = sizeof(struct dirent);
550 cde->d_type = DT_DIR;
551 cde->d_namlen = 1;
552 strncpy(cde->d_name, ".", 2);
553 error = uiomove((void *)cde, sizeof(struct dirent), uio);
554 if (error)
555 goto out;
556
557 ncookies++;
558 }
559
560 /* Simulate .. in every dir including ROOT */
561 if (uio->uio_offset < 2 * sizeof(struct dirent)) {
562 cde->d_fileno = NTFS_ROOTINO; /* XXX */
563 cde->d_reclen = sizeof(struct dirent);
564 cde->d_type = DT_DIR;
565 cde->d_namlen = 2;
566 strncpy(cde->d_name, "..", 3);
567
568 error = uiomove((void *) cde, sizeof(struct dirent), uio);
569 if (error)
570 goto out;
571
572 ncookies++;
573 }
574
575 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2;
576 num = uio->uio_offset / sizeof(struct dirent) - faked;
577
578 while (uio->uio_resid >= sizeof(struct dirent)) {
579 struct attr_indexentry *iep;
580 char *fname;
581 size_t remains;
582 int sz;
583
584 error = ntfs_ntreaddir(ntmp, fp, num, &iep);
585 if (error)
586 goto out;
587
588 if (NULL == iep)
589 break;
590
591 for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent));
592 iep = NTFS_NEXTREC(iep, struct attr_indexentry *))
593 {
594 if(!ntfs_isnamepermitted(ntmp,iep))
595 continue;
596
597 remains = sizeof(cde->d_name) - 1;
598 fname = cde->d_name;
599 for(i=0; i<iep->ie_fnamelen; i++) {
600 sz = (*ntmp->ntm_wput)(fname, remains,
601 iep->ie_fname[i]);
602 fname += sz;
603 remains -= sz;
604 }
605 *fname = '\0';
606 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, ",
607 num, cde->d_name, iep->ie_fnametype,
608 iep->ie_flag));
609 cde->d_namlen = fname - (char *) cde->d_name;
610 cde->d_fileno = iep->ie_number;
611 cde->d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG;
612 cde->d_reclen = sizeof(struct dirent);
613 dprintf(("%s\n", (cde->d_type == DT_DIR) ? "dir":"reg"));
614
615 error = uiomove((void *)cde, sizeof(struct dirent), uio);
616 if (error)
617 goto out;
618
619 ncookies++;
620 num++;
621 }
622 }
623
624 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n",
625 ncookies,(u_int)(uio->uio_offset - off)));
626 dprintf(("ntfs_readdir: off: %qd resid: %qu\n",
627 (long long)uio->uio_offset,(long long)uio->uio_resid));
628
629 if (!error && ap->a_ncookies != NULL) {
630 struct dirent* dpStart;
631 struct dirent* dp;
632 off_t *cookies;
633 off_t *cookiep;
634
635 dprintf(("ntfs_readdir: %d cookies\n",ncookies));
636 dpStart = (struct dirent *)
637 ((char *)uio->uio_iov->iov_base -
638 (uio->uio_offset - off));
639 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
640 for (dp = dpStart, cookiep = cookies, i=0;
641 i < ncookies;
642 dp = (struct dirent *)((char *) dp + dp->d_reclen), i++) {
643 off += dp->d_reclen;
644 *cookiep++ = (u_int) off;
645 }
646 *ap->a_ncookies = ncookies;
647 *ap->a_cookies = cookies;
648 }
649/*
650 if (ap->a_eofflag)
651 *ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset;
652*/
653 out:
654 free(cde, M_TEMP);
655 return (error);
656}
657
658int
659ntfs_lookup(void *v)
660{
661 struct vop_lookup_v2_args /* {
662 struct vnode *a_dvp;
663 struct vnode **a_vpp;
664 struct componentname *a_cnp;
665 } */ *ap = v;
666 struct vnode *dvp = ap->a_dvp;
667 struct ntnode *dip = VTONT(dvp);
668 struct ntfsmount *ntmp = dip->i_mp;
669 struct componentname *cnp = ap->a_cnp;
670 kauth_cred_t cred = cnp->cn_cred;
671 int error;
672
673 dprintf(("ntfs_lookup: \"%.*s\" (%lld bytes) in %llu\n",
674 (int)cnp->cn_namelen, cnp->cn_nameptr, (long long)cnp->cn_namelen,
675 (unsigned long long)dip->i_number));
676
677 error = VOP_ACCESS(dvp, VEXEC, cred);
678 if(error)
679 return (error);
680
681 if ((cnp->cn_flags & ISLASTCN) &&
682 (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
683 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
684 return (EROFS);
685
686 /*
687 * We now have a segment name to search for, and a directory
688 * to search.
689 *
690 * Before tediously performing a linear scan of the directory,
691 * check the name cache to see if the directory/name pair
692 * we are looking for is known already.
693 */
694 if (cache_lookup(ap->a_dvp, cnp->cn_nameptr, cnp->cn_namelen,
695 cnp->cn_nameiop, cnp->cn_flags, NULL, ap->a_vpp)) {
696 return *ap->a_vpp == NULLVP ? ENOENT : 0;
697 }
698
699 if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
700 dprintf(("ntfs_lookup: faking . directory in %llu\n",
701 (unsigned long long)dip->i_number));
702
703 vref(dvp);
704 *ap->a_vpp = dvp;
705 error = 0;
706 } else if (cnp->cn_flags & ISDOTDOT) {
707 struct ntvattr *vap;
708
709 dprintf(("ntfs_lookup: faking .. directory in %llu\n",
710 (unsigned long long)dip->i_number));
711
712 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
713 if (error) {
714 return (error);
715 }
716
717 dprintf(("ntfs_lookup: parentdir: %d\n",
718 vap->va_a_name->n_pnumber));
719 error = ntfs_vgetex(ntmp->ntm_mountp,
720 vap->va_a_name->n_pnumber,
721 NTFS_A_DATA, "", 0, ap->a_vpp);
722 ntfs_ntvattrrele(vap);
723 if (error) {
724 return (error);
725 }
726 } else {
727 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp);
728 if (error) {
729 dprintf(("ntfs_ntlookupfile: returned %d\n", error));
730 return (error);
731 }
732
733 dprintf(("ntfs_lookup: found ino: %llu\n",
734 (unsigned long long)VTONT(*ap->a_vpp)->i_number));
735 }
736
737 cache_enter(dvp, *ap->a_vpp, cnp->cn_nameptr, cnp->cn_namelen,
738 cnp->cn_flags);
739
740 return error;
741}
742
743/*
744 * Flush the blocks of a file to disk.
745 *
746 * This function is worthless for vnodes that represent directories. Maybe we
747 * could just do a sync if they try an fsync on a directory file.
748 */
749static int
750ntfs_fsync(void *v)
751{
752 struct vop_fsync_args /* {
753 struct vnode *a_vp;
754 kauth_cred_t a_cred;
755 int a_flags;
756 off_t offlo;
757 off_t offhi;
758 } */ *ap = v;
759 struct vnode *vp = ap->a_vp;
760
761 if (ap->a_flags & FSYNC_CACHE) {
762 return EOPNOTSUPP;
763 }
764
765 return vflushbuf(vp, ap->a_flags);
766}
767
768/*
769 * Return POSIX pathconf information applicable to NTFS filesystem
770 */
771static int
772ntfs_pathconf(void *v)
773{
774 struct vop_pathconf_args /* {
775 struct vnode *a_vp;
776 int a_name;
777 register_t *a_retval;
778 } */ *ap = v;
779
780 switch (ap->a_name) {
781 case _PC_LINK_MAX:
782 *ap->a_retval = 1;
783 return (0);
784 case _PC_NAME_MAX:
785 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax;
786 return (0);
787 case _PC_PATH_MAX:
788 *ap->a_retval = PATH_MAX;
789 return (0);
790 case _PC_CHOWN_RESTRICTED:
791 *ap->a_retval = 1;
792 return (0);
793 case _PC_NO_TRUNC:
794 *ap->a_retval = 0;
795 return (0);
796 case _PC_SYNC_IO:
797 *ap->a_retval = 1;
798 return (0);
799 case _PC_FILESIZEBITS:
800 *ap->a_retval = 64;
801 return (0);
802 default:
803 return (EINVAL);
804 }
805 /* NOTREACHED */
806}
807
808/*
809 * Global vfs data structures
810 */
811vop_t **ntfs_vnodeop_p;
812
813const struct vnodeopv_entry_desc ntfs_vnodeop_entries[] = {
814 { &vop_default_desc, (vop_t *) ntfs_bypass },
815 { &vop_lookup_desc, (vop_t *) ntfs_lookup }, /* lookup */
816 { &vop_create_desc, genfs_eopnotsupp }, /* create */
817 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */
818 { &vop_open_desc, (vop_t *) ntfs_open }, /* open */
819 { &vop_close_desc,(vop_t *) ntfs_close }, /* close */
820 { &vop_access_desc, (vop_t *) ntfs_access }, /* access */
821 { &vop_getattr_desc, (vop_t *) ntfs_getattr }, /* getattr */
822 { &vop_setattr_desc, genfs_eopnotsupp }, /* setattr */
823 { &vop_read_desc, (vop_t *) ntfs_read }, /* read */
824 { &vop_write_desc, (vop_t *) ntfs_write }, /* write */
825 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */
826 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */
827 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */
828 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */
829 { &vop_poll_desc, genfs_poll }, /* poll */
830 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */
831 { &vop_revoke_desc, genfs_revoke }, /* revoke */
832 { &vop_mmap_desc, genfs_mmap }, /* mmap */
833 { &vop_fsync_desc, (vop_t *) ntfs_fsync }, /* fsync */
834 { &vop_seek_desc, genfs_seek }, /* seek */
835 { &vop_remove_desc, genfs_eopnotsupp }, /* remove */
836 { &vop_link_desc, genfs_eopnotsupp }, /* link */
837 { &vop_rename_desc, genfs_eopnotsupp }, /* rename */
838 { &vop_mkdir_desc, genfs_eopnotsupp }, /* mkdir */
839 { &vop_rmdir_desc, genfs_eopnotsupp }, /* rmdir */
840 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */
841 { &vop_readdir_desc, (vop_t *) ntfs_readdir }, /* readdir */
842 { &vop_readlink_desc, genfs_eopnotsupp }, /* readlink */
843 { &vop_abortop_desc, genfs_abortop }, /* abortop */
844 { &vop_inactive_desc, (vop_t *) ntfs_inactive }, /* inactive */
845 { &vop_reclaim_desc, (vop_t *) ntfs_reclaim }, /* reclaim */
846 { &vop_lock_desc, genfs_lock }, /* lock */
847 { &vop_unlock_desc, genfs_unlock }, /* unlock */
848 { &vop_bmap_desc, (vop_t *) ntfs_bmap }, /* bmap */
849 { &vop_strategy_desc, (vop_t *) ntfs_strategy }, /* strategy */
850 { &vop_print_desc, (vop_t *) ntfs_print }, /* print */
851 { &vop_islocked_desc, genfs_islocked }, /* islocked */
852 { &vop_pathconf_desc, ntfs_pathconf }, /* pathconf */
853 { &vop_advlock_desc, genfs_nullop }, /* advlock */
854 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */
855 { &vop_getpages_desc, genfs_compat_getpages }, /* getpages */
856 { &vop_putpages_desc, genfs_putpages }, /* putpages */
857 { NULL, NULL }
858};
859const struct vnodeopv_desc ntfs_vnodeop_opv_desc =
860 { &ntfs_vnodeop_p, ntfs_vnodeop_entries };
861