1 /* $NetBSD: ntfs_vnops.c,v 1.41 2008/04/30 14:07:14 ad 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 1.41 2008/04/30 14:07:14 ad 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 <miscfs/specfs/specdev.h>
60 #include <miscfs/genfs/genfs.h>
61
62 #include <sys/unistd.h> /* for pathconf(2) constants */
63
64 static int ntfs_bypass(void *);
65 static int ntfs_read(void *);
66 static int ntfs_write(void *);
67 static int ntfs_getattr(void *);
68 static int ntfs_inactive(void *);
69 static int ntfs_print(void *);
70 static int ntfs_reclaim(void *);
71 static int ntfs_strategy(void *);
72 static int ntfs_access(void *);
73 static int ntfs_open(void *);
74 static int ntfs_close(void *);
75 static int ntfs_readdir(void *);
76 static int ntfs_lookup(void *);
77 static int ntfs_bmap(void *);
78 static int ntfs_fsync(void *);
79 static int ntfs_pathconf(void *);
80
81 extern int prtactive;
82
83 /*
84 * This is a noop, simply returning what one has been given.
85 */
86 int
87 ntfs_bmap(void *v)
88 {
89 struct vop_bmap_args /* {
90 struct vnode *a_vp;
91 daddr_t a_bn;
92 struct vnode **a_vpp;
93 daddr_t *a_bnp;
94 int *a_runp;
95 int *a_runb;
96 } */ *ap = v;
97 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn));
98 if (ap->a_vpp != NULL)
99 *ap->a_vpp = ap->a_vp;
100 if (ap->a_bnp != NULL)
101 *ap->a_bnp = ap->a_bn;
102 if (ap->a_runp != NULL)
103 *ap->a_runp = 0;
104 return (0);
105 }
106
107 static int
108 ntfs_read(void *v)
109 {
110 struct vop_read_args /* {
111 struct vnode *a_vp;
112 struct uio *a_uio;
113 int a_ioflag;
114 kauth_cred_t a_cred;
115 } */ *ap = v;
116 struct vnode *vp = ap->a_vp;
117 struct fnode *fp = VTOF(vp);
118 struct ntnode *ip = FTONT(fp);
119 struct uio *uio = ap->a_uio;
120 struct ntfsmount *ntmp = ip->i_mp;
121 u_int64_t toread;
122 int error;
123
124 dprintf(("ntfs_read: ino: %llu, off: %qd resid: %qd\n",
125 (unsigned long long)ip->i_number, (long long)uio->uio_offset,
126 (long long)uio->uio_resid));
127
128 dprintf(("ntfs_read: filesize: %qu",(long long)fp->f_size));
129
130 /* don't allow reading after end of file */
131 if (uio->uio_offset > fp->f_size)
132 toread = 0;
133 else
134 toread = MIN(uio->uio_resid, fp->f_size - uio->uio_offset );
135
136 dprintf((", toread: %qu\n",(long long)toread));
137
138 if (toread == 0)
139 return (0);
140
141 error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
142 fp->f_attrname, uio->uio_offset, toread, NULL, uio);
143 if (error) {
144 printf("ntfs_read: ntfs_readattr failed: %d\n",error);
145 return (error);
146 }
147
148 return (0);
149 }
150
151 static int
152 ntfs_bypass(void *v)
153 {
154 struct vop_generic_args /* {
155 struct vnodeop_desc *a_desc;
156 <other random data follows, presumably>
157 } */ *ap __unused = v;
158 int error = ENOTTY;
159 dprintf(("ntfs_bypass: %s\n", ap->a_desc->vdesc_name));
160 return (error);
161 }
162
163
164 static int
165 ntfs_getattr(void *v)
166 {
167 struct vop_getattr_args /* {
168 struct vnode *a_vp;
169 struct vattr *a_vap;
170 kauth_cred_t a_cred;
171 } */ *ap = v;
172 struct vnode *vp = ap->a_vp;
173 struct fnode *fp = VTOF(vp);
174 struct ntnode *ip = FTONT(fp);
175 struct vattr *vap = ap->a_vap;
176
177 dprintf(("ntfs_getattr: %llu, flags: %d\n",
178 (unsigned long long)ip->i_number, ip->i_flag));
179
180 vap->va_fsid = ip->i_dev;
181 vap->va_fileid = ip->i_number;
182 vap->va_mode = ip->i_mp->ntm_mode;
183 vap->va_nlink = ip->i_nlink;
184 vap->va_uid = ip->i_mp->ntm_uid;
185 vap->va_gid = ip->i_mp->ntm_gid;
186 vap->va_rdev = 0; /* XXX UNODEV ? */
187 vap->va_size = fp->f_size;
188 vap->va_bytes = fp->f_allocated;
189 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access);
190 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write);
191 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create);
192 vap->va_flags = ip->i_flag;
193 vap->va_gen = 0;
194 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps;
195 vap->va_type = vp->v_type;
196 vap->va_filerev = 0;
197 return (0);
198 }
199
200
201 /*
202 * Last reference to an ntnode. If necessary, write or delete it.
203 */
204 int
205 ntfs_inactive(void *v)
206 {
207 struct vop_inactive_args /* {
208 struct vnode *a_vp;
209 } */ *ap = v;
210 struct vnode *vp = ap->a_vp;
211 #ifdef NTFS_DEBUG
212 struct ntnode *ip = VTONT(vp);
213 #endif
214
215 dprintf(("ntfs_inactive: vnode: %p, ntnode: %llu\n", vp,
216 (unsigned long long)ip->i_number));
217
218 VOP_UNLOCK(vp, 0);
219
220 /* XXX since we don't support any filesystem changes
221 * right now, nothing more needs to be done
222 */
223 return (0);
224 }
225
226 /*
227 * Reclaim an fnode/ntnode so that it can be used for other purposes.
228 */
229 int
230 ntfs_reclaim(void *v)
231 {
232 struct vop_reclaim_args /* {
233 struct vnode *a_vp;
234 } */ *ap = v;
235 struct vnode *vp = ap->a_vp;
236 struct fnode *fp = VTOF(vp);
237 struct ntnode *ip = FTONT(fp);
238 int error;
239
240 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %llu\n", vp,
241 (unsigned long long)ip->i_number));
242
243 if (prtactive && vp->v_usecount > 1)
244 vprint("ntfs_reclaim: pushing active", vp);
245
246 if ((error = ntfs_ntget(ip)) != 0)
247 return (error);
248
249 /* Purge old data structures associated with the inode. */
250 cache_purge(vp);
251 if (ip->i_devvp) {
252 vrele(ip->i_devvp);
253 ip->i_devvp = NULL;
254 }
255
256 genfs_node_destroy(vp);
257 ntfs_frele(fp);
258 ntfs_ntput(ip);
259 vp->v_data = NULL;
260
261 return (0);
262 }
263
264 static int
265 ntfs_print(void *v)
266 {
267 struct vop_print_args /* {
268 struct vnode *a_vp;
269 } */ *ap = v;
270 struct ntnode *ip = VTONT(ap->a_vp);
271
272 printf("tag VT_NTFS, ino %llu, flag %#x, usecount %d, nlink %ld\n",
273 (unsigned long long)ip->i_number, ip->i_flag, ip->i_usecount,
274 ip->i_nlink);
275 printf(" ");
276 printf("\n");
277 return (0);
278 }
279
280 /*
281 * Calculate the logical to physical mapping if not done already,
282 * then call the device strategy routine.
283 */
284 int
285 ntfs_strategy(void *v)
286 {
287 struct vop_strategy_args /* {
288 struct vnode *a_vp;
289 struct buf *a_bp;
290 } */ *ap = v;
291 struct buf *bp = ap->a_bp;
292 struct vnode *vp = ap->a_vp;
293 struct fnode *fp = VTOF(vp);
294 struct ntnode *ip = FTONT(fp);
295 struct ntfsmount *ntmp = ip->i_mp;
296 int error;
297
298 dprintf(("ntfs_strategy: blkno: %d, lblkno: %d\n",
299 (u_int32_t)bp->b_blkno,
300 (u_int32_t)bp->b_lblkno));
301
302 dprintf(("strategy: bcount: %u flags: 0x%x\n",
303 (u_int32_t)bp->b_bcount,bp->b_flags));
304
305 if (bp->b_flags & B_READ) {
306 u_int32_t toread;
307
308 if (ntfs_cntob(bp->b_blkno) >= fp->f_size) {
309 clrbuf(bp);
310 error = 0;
311 } else {
312 toread = MIN(bp->b_bcount,
313 fp->f_size - ntfs_cntob(bp->b_blkno));
314 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n",
315 toread,(u_int32_t)fp->f_size));
316
317 error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
318 fp->f_attrname, ntfs_cntob(bp->b_blkno),
319 toread, bp->b_data, NULL);
320
321 if (error) {
322 printf("ntfs_strategy: ntfs_readattr failed\n");
323 bp->b_error = error;
324 }
325
326 memset((char *)bp->b_data + toread, 0,
327 bp->b_bcount - toread);
328 }
329 } else {
330 size_t tmp;
331 u_int32_t towrite;
332
333 if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) {
334 printf("ntfs_strategy: CAN'T EXTEND FILE\n");
335 bp->b_error = error = EFBIG;
336 } else {
337 towrite = MIN(bp->b_bcount,
338 fp->f_size - ntfs_cntob(bp->b_blkno));
339 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n",
340 towrite,(u_int32_t)fp->f_size));
341
342 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
343 fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite,
344 bp->b_data, &tmp, NULL);
345
346 if (error) {
347 printf("ntfs_strategy: ntfs_writeattr fail\n");
348 bp->b_error = error;
349 }
350 }
351 }
352 biodone(bp);
353 return (error);
354 }
355
356 static int
357 ntfs_write(void *v)
358 {
359 struct vop_write_args /* {
360 struct vnode *a_vp;
361 struct uio *a_uio;
362 int a_ioflag;
363 kauth_cred_t a_cred;
364 } */ *ap = v;
365 struct vnode *vp = ap->a_vp;
366 struct fnode *fp = VTOF(vp);
367 struct ntnode *ip = FTONT(fp);
368 struct uio *uio = ap->a_uio;
369 struct ntfsmount *ntmp = ip->i_mp;
370 u_int64_t towrite;
371 size_t written;
372 int error;
373
374 dprintf(("ntfs_write: ino: %llu, off: %qd resid: %qd\n",
375 (unsigned long long)ip->i_number, (long long)uio->uio_offset,
376 (long long)uio->uio_resid));
377 dprintf(("ntfs_write: filesize: %qu",(long long)fp->f_size));
378
379 if (uio->uio_resid + uio->uio_offset > fp->f_size) {
380 printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n");
381 return (EFBIG);
382 }
383
384 towrite = MIN(uio->uio_resid, fp->f_size - uio->uio_offset);
385
386 dprintf((", towrite: %qu\n",(long long)towrite));
387
388 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
389 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio);
390 #ifdef NTFS_DEBUG
391 if (error)
392 printf("ntfs_write: ntfs_writeattr failed: %d\n", error);
393 #endif
394
395 return (error);
396 }
397
398 int
399 ntfs_access(void *v)
400 {
401 struct vop_access_args /* {
402 struct vnode *a_vp;
403 int a_mode;
404 kauth_cred_t a_cred;
405 } */ *ap = v;
406 struct vnode *vp = ap->a_vp;
407 struct ntnode *ip = VTONT(vp);
408 kauth_cred_t cred = ap->a_cred;
409 mode_t mask, mode = ap->a_mode;
410 gid_t grp;
411 int i;
412 uint16_t ngroups;
413
414 dprintf(("ntfs_access: %llu\n", (unsigned long long)ip->i_number));
415
416 /*
417 * Disallow write attempts on read-only file systems;
418 * unless the file is a socket, fifo, or a block or
419 * character device resident on the file system.
420 */
421 if (mode & VWRITE) {
422 switch ((int)vp->v_type) {
423 case VDIR:
424 case VLNK:
425 case VREG:
426 if (vp->v_mount->mnt_flag & MNT_RDONLY)
427 return (EROFS);
428 break;
429 }
430 }
431
432 /* Otherwise, user id 0 always gets access. */
433 if (kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL) == 0)
434 return (0);
435
436 mask = 0;
437
438 /* Otherwise, check the owner. */
439 if (kauth_cred_geteuid(cred) == ip->i_mp->ntm_uid) {
440 if (mode & VEXEC)
441 mask |= S_IXUSR;
442 if (mode & VREAD)
443 mask |= S_IRUSR;
444 if (mode & VWRITE)
445 mask |= S_IWUSR;
446 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
447 }
448
449 /* Otherwise, check the groups. */
450 ngroups = kauth_cred_ngroups(cred);
451 for (i = 0; i < ngroups; i++) {
452 grp = kauth_cred_group(cred, i);
453 if (ip->i_mp->ntm_gid == grp) {
454 if (mode & VEXEC)
455 mask |= S_IXGRP;
456 if (mode & VREAD)
457 mask |= S_IRGRP;
458 if (mode & VWRITE)
459 mask |= S_IWGRP;
460 return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES);
461 }
462 }
463
464 /* Otherwise, check everyone else. */
465 if (mode & VEXEC)
466 mask |= S_IXOTH;
467 if (mode & VREAD)
468 mask |= S_IROTH;
469 if (mode & VWRITE)
470 mask |= S_IWOTH;
471 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
472 }
473
474 /*
475 * Open called.
476 *
477 * Nothing to do.
478 */
479 /* ARGSUSED */
480 static int
481 ntfs_open(void *v)
482 {
483 struct vop_open_args /* {
484 struct vnode *a_vp;
485 int a_mode;
486 kauth_cred_t a_cred;
487 } */ *ap __unused = v;
488 #ifdef NTFS_DEBUG
489 struct vnode *vp = ap->a_vp;
490 struct ntnode *ip = VTONT(vp);
491
492 printf("ntfs_open: %llu\n", (unsigned long long)ip->i_number);
493 #endif
494
495 /*
496 * Files marked append-only must be opened for appending.
497 */
498
499 return (0);
500 }
501
502 /*
503 * Close called.
504 *
505 * Update the times on the inode.
506 */
507 /* ARGSUSED */
508 static int
509 ntfs_close(void *v)
510 {
511 struct vop_close_args /* {
512 struct vnode *a_vp;
513 int a_fflag;
514 kauth_cred_t a_cred;
515 } */ *ap __unused = v;
516 #ifdef NTFS_DEBUG
517 struct vnode *vp = ap->a_vp;
518 struct ntnode *ip = VTONT(vp);
519
520 printf("ntfs_close: %llu\n", (unsigned long long)ip->i_number);
521 #endif
522
523 return (0);
524 }
525
526 int
527 ntfs_readdir(void *v)
528 {
529 struct vop_readdir_args /* {
530 struct vnode *a_vp;
531 struct uio *a_uio;
532 kauth_cred_t a_cred;
533 int *a_ncookies;
534 u_int **cookies;
535 } */ *ap = v;
536 struct vnode *vp = ap->a_vp;
537 struct fnode *fp = VTOF(vp);
538 struct ntnode *ip = FTONT(fp);
539 struct uio *uio = ap->a_uio;
540 struct ntfsmount *ntmp = ip->i_mp;
541 int i, error = 0;
542 u_int32_t faked = 0, num;
543 int ncookies = 0;
544 struct dirent *cde;
545 off_t off;
546
547 dprintf(("ntfs_readdir %llu off: %qd resid: %qd\n",
548 (unsigned long long)ip->i_number, (long long)uio->uio_offset,
549 (long long)uio->uio_resid));
550
551 off = uio->uio_offset;
552
553 MALLOC(cde, struct dirent *, sizeof(struct dirent), M_TEMP, M_WAITOK);
554
555 /* Simulate . in every dir except ROOT */
556 if (ip->i_number != NTFS_ROOTINO
557 && uio->uio_offset < sizeof(struct dirent)) {
558 cde->d_fileno = ip->i_number;
559 cde->d_reclen = sizeof(struct dirent);
560 cde->d_type = DT_DIR;
561 cde->d_namlen = 1;
562 strncpy(cde->d_name, ".", 2);
563 error = uiomove((void *)cde, sizeof(struct dirent), uio);
564 if (error)
565 goto out;
566
567 ncookies++;
568 }
569
570 /* Simulate .. in every dir including ROOT */
571 if (uio->uio_offset < 2 * sizeof(struct dirent)) {
572 cde->d_fileno = NTFS_ROOTINO; /* XXX */
573 cde->d_reclen = sizeof(struct dirent);
574 cde->d_type = DT_DIR;
575 cde->d_namlen = 2;
576 strncpy(cde->d_name, "..", 3);
577
578 error = uiomove((void *) cde, sizeof(struct dirent), uio);
579 if (error)
580 goto out;
581
582 ncookies++;
583 }
584
585 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2;
586 num = uio->uio_offset / sizeof(struct dirent) - faked;
587
588 while (uio->uio_resid >= sizeof(struct dirent)) {
589 struct attr_indexentry *iep;
590 char *fname;
591 size_t remains;
592 int sz;
593
594 error = ntfs_ntreaddir(ntmp, fp, num, &iep);
595 if (error)
596 goto out;
597
598 if (NULL == iep)
599 break;
600
601 for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent));
602 iep = NTFS_NEXTREC(iep, struct attr_indexentry *))
603 {
604 if(!ntfs_isnamepermitted(ntmp,iep))
605 continue;
606
607 remains = sizeof(cde->d_name) - 1;
608 fname = cde->d_name;
609 for(i=0; i<iep->ie_fnamelen; i++) {
610 sz = (*ntmp->ntm_wput)(fname, remains,
611 iep->ie_fname[i]);
612 fname += sz;
613 remains -= sz;
614 }
615 *fname = '\0';
616 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, ",
617 num, cde->d_name, iep->ie_fnametype,
618 iep->ie_flag));
619 cde->d_namlen = fname - (char *) cde->d_name;
620 cde->d_fileno = iep->ie_number;
621 cde->d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG;
622 cde->d_reclen = sizeof(struct dirent);
623 dprintf(("%s\n", (cde->d_type == DT_DIR) ? "dir":"reg"));
624
625 error = uiomove((void *)cde, sizeof(struct dirent), uio);
626 if (error)
627 goto out;
628
629 ncookies++;
630 num++;
631 }
632 }
633
634 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n",
635 ncookies,(u_int)(uio->uio_offset - off)));
636 dprintf(("ntfs_readdir: off: %qd resid: %qu\n",
637 (long long)uio->uio_offset,(long long)uio->uio_resid));
638
639 if (!error && ap->a_ncookies != NULL) {
640 struct dirent* dpStart;
641 struct dirent* dp;
642 off_t *cookies;
643 off_t *cookiep;
644
645 dprintf(("ntfs_readdir: %d cookies\n",ncookies));
646 dpStart = (struct dirent *)
647 ((char *)uio->uio_iov->iov_base -
648 (uio->uio_offset - off));
649 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
650 for (dp = dpStart, cookiep = cookies, i=0;
651 i < ncookies;
652 dp = (struct dirent *)((char *) dp + dp->d_reclen), i++) {
653 off += dp->d_reclen;
654 *cookiep++ = (u_int) off;
655 }
656 *ap->a_ncookies = ncookies;
657 *ap->a_cookies = cookies;
658 }
659 /*
660 if (ap->a_eofflag)
661 *ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset;
662 */
663 out:
664 FREE(cde, M_TEMP);
665 return (error);
666 }
667
668 int
669 ntfs_lookup(void *v)
670 {
671 struct vop_lookup_args /* {
672 struct vnode *a_dvp;
673 struct vnode **a_vpp;
674 struct componentname *a_cnp;
675 } */ *ap = v;
676 struct vnode *dvp = ap->a_dvp;
677 struct ntnode *dip = VTONT(dvp);
678 struct ntfsmount *ntmp = dip->i_mp;
679 struct componentname *cnp = ap->a_cnp;
680 kauth_cred_t cred = cnp->cn_cred;
681 int error;
682
683 dprintf(("ntfs_lookup: \"%.*s\" (%lld bytes) in %llu\n",
684 (int)cnp->cn_namelen, cnp->cn_nameptr, (long long)cnp->cn_namelen,
685 (unsigned long long)dip->i_number));
686
687 error = VOP_ACCESS(dvp, VEXEC, cred);
688 if(error)
689 return (error);
690
691 if ((cnp->cn_flags & ISLASTCN) &&
692 (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
693 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
694 return (EROFS);
695
696 /*
697 * We now have a segment name to search for, and a directory
698 * to search.
699 *
700 * Before tediously performing a linear scan of the directory,
701 * check the name cache to see if the directory/name pair
702 * we are looking for is known already.
703 */
704 if ((error = cache_lookup(ap->a_dvp, ap->a_vpp, cnp)) >= 0)
705 return (error);
706
707 if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
708 dprintf(("ntfs_lookup: faking . directory in %llu\n",
709 (unsigned long long)dip->i_number));
710
711 VREF(dvp);
712 *ap->a_vpp = dvp;
713 error = 0;
714 } else if (cnp->cn_flags & ISDOTDOT) {
715 struct ntvattr *vap;
716
717 dprintf(("ntfs_lookup: faking .. directory in %llu\n",
718 (unsigned long long)dip->i_number));
719
720 VOP_UNLOCK(dvp, 0);
721 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
722 if (error) {
723 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
724 return (error);
725 }
726
727 dprintf(("ntfs_lookup: parentdir: %d\n",
728 vap->va_a_name->n_pnumber));
729 error = VFS_VGET(ntmp->ntm_mountp,
730 vap->va_a_name->n_pnumber,ap->a_vpp);
731 ntfs_ntvattrrele(vap);
732 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
733 if (error) {
734 return (error);
735 }
736 } else {
737 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp);
738 if (error) {
739 dprintf(("ntfs_ntlookupfile: returned %d\n", error));
740 return (error);
741 }
742
743 dprintf(("ntfs_lookup: found ino: %llu\n",
744 (unsigned long long)VTONT(*ap->a_vpp)->i_number));
745 }
746
747 if (cnp->cn_flags & MAKEENTRY)
748 cache_enter(dvp, *ap->a_vpp, cnp);
749
750 return (error);
751 }
752
753 /*
754 * Flush the blocks of a file to disk.
755 *
756 * This function is worthless for vnodes that represent directories. Maybe we
757 * could just do a sync if they try an fsync on a directory file.
758 */
759 static int
760 ntfs_fsync(void *v)
761 {
762 struct vop_fsync_args /* {
763 struct vnode *a_vp;
764 kauth_cred_t a_cred;
765 int a_flags;
766 off_t offlo;
767 off_t offhi;
768 } */ *ap = v;
769 struct vnode *vp = ap->a_vp;
770 int wait;
771
772 if (ap->a_flags & FSYNC_CACHE) {
773 return EOPNOTSUPP;
774 }
775
776 wait = (ap->a_flags & FSYNC_WAIT) != 0;
777 vflushbuf(vp, wait);
778
779 return 0;
780 }
781
782 /*
783 * Return POSIX pathconf information applicable to NTFS filesystem
784 */
785 static int
786 ntfs_pathconf(void *v)
787 {
788 struct vop_pathconf_args /* {
789 struct vnode *a_vp;
790 int a_name;
791 register_t *a_retval;
792 } */ *ap = v;
793
794 switch (ap->a_name) {
795 case _PC_LINK_MAX:
796 *ap->a_retval = 1;
797 return (0);
798 case _PC_NAME_MAX:
799 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax;
800 return (0);
801 case _PC_PATH_MAX:
802 *ap->a_retval = PATH_MAX;
803 return (0);
804 case _PC_CHOWN_RESTRICTED:
805 *ap->a_retval = 1;
806 return (0);
807 case _PC_NO_TRUNC:
808 *ap->a_retval = 0;
809 return (0);
810 case _PC_SYNC_IO:
811 *ap->a_retval = 1;
812 return (0);
813 case _PC_FILESIZEBITS:
814 *ap->a_retval = 64;
815 return (0);
816 default:
817 return (EINVAL);
818 }
819 /* NOTREACHED */
820 }
821
822 /*
823 * Global vfs data structures
824 */
825 vop_t **ntfs_vnodeop_p;
826
827 const struct vnodeopv_entry_desc ntfs_vnodeop_entries[] = {
828 { &vop_default_desc, (vop_t *) ntfs_bypass },
829 { &vop_lookup_desc, (vop_t *) ntfs_lookup }, /* lookup */
830 { &vop_create_desc, genfs_eopnotsupp }, /* create */
831 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */
832 { &vop_open_desc, (vop_t *) ntfs_open }, /* open */
833 { &vop_close_desc,(vop_t *) ntfs_close }, /* close */
834 { &vop_access_desc, (vop_t *) ntfs_access }, /* access */
835 { &vop_getattr_desc, (vop_t *) ntfs_getattr }, /* getattr */
836 { &vop_setattr_desc, genfs_eopnotsupp }, /* setattr */
837 { &vop_read_desc, (vop_t *) ntfs_read }, /* read */
838 { &vop_write_desc, (vop_t *) ntfs_write }, /* write */
839 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */
840 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */
841 { &vop_poll_desc, genfs_poll }, /* poll */
842 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */
843 { &vop_revoke_desc, genfs_revoke }, /* revoke */
844 { &vop_mmap_desc, genfs_mmap }, /* mmap */
845 { &vop_fsync_desc, (vop_t *) ntfs_fsync }, /* fsync */
846 { &vop_seek_desc, genfs_seek }, /* seek */
847 { &vop_remove_desc, genfs_eopnotsupp }, /* remove */
848 { &vop_link_desc, genfs_eopnotsupp }, /* link */
849 { &vop_rename_desc, genfs_eopnotsupp }, /* rename */
850 { &vop_mkdir_desc, genfs_eopnotsupp }, /* mkdir */
851 { &vop_rmdir_desc, genfs_eopnotsupp }, /* rmdir */
852 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */
853 { &vop_readdir_desc, (vop_t *) ntfs_readdir }, /* readdir */
854 { &vop_readlink_desc, genfs_eopnotsupp }, /* readlink */
855 { &vop_abortop_desc, genfs_abortop }, /* abortop */
856 { &vop_inactive_desc, (vop_t *) ntfs_inactive }, /* inactive */
857 { &vop_reclaim_desc, (vop_t *) ntfs_reclaim }, /* reclaim */
858 { &vop_lock_desc, genfs_lock }, /* lock */
859 { &vop_unlock_desc, genfs_unlock }, /* unlock */
860 { &vop_bmap_desc, (vop_t *) ntfs_bmap }, /* bmap */
861 { &vop_strategy_desc, (vop_t *) ntfs_strategy }, /* strategy */
862 { &vop_print_desc, (vop_t *) ntfs_print }, /* print */
863 { &vop_islocked_desc, genfs_islocked }, /* islocked */
864 { &vop_pathconf_desc, ntfs_pathconf }, /* pathconf */
865 { &vop_advlock_desc, genfs_nullop }, /* advlock */
866 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */
867 { &vop_getpages_desc, genfs_compat_getpages }, /* getpages */
868 { &vop_putpages_desc, genfs_putpages }, /* putpages */
869 { NULL, NULL }
870 };
871 const struct vnodeopv_desc ntfs_vnodeop_opv_desc =
872 { &ntfs_vnodeop_p, ntfs_vnodeop_entries };
Cache object: e9f09ef2b7833c08dfbdab14ab41b39d
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