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[netbsd-mini2440.git] / sys / fs / ntfs / ntfs_subr.c
blobf9a35f5cb39b6f7175d1e7446d29699958eeea0a
1 /* $NetBSD: ntfs_subr.c,v 1.43 2009/09/01 15:16:41 pooka Exp $ */
2
3 /*-
4 * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * Id: ntfs_subr.c,v 1.4 1999/05/12 09:43:01 semenu Exp
29 */
30
31 #include <sys/cdefs.h>
32 __KERNEL_RCSID(0, "$NetBSD: ntfs_subr.c,v 1.43 2009/09/01 15:16:41 pooka Exp $");
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/namei.h>
37 #include <sys/proc.h>
38 #include <sys/kernel.h>
39 #include <sys/vnode.h>
40 #include <sys/mount.h>
41 #include <sys/buf.h>
42 #include <sys/file.h>
43 #include <sys/malloc.h>
44 #include <sys/lock.h>
45 #include <sys/kauth.h>
46
47 #include <miscfs/specfs/specdev.h>
48
49 #include <fs/ntfs/ntfs.h>
50 #include <fs/ntfs/ntfsmount.h>
51 #include <fs/ntfs/ntfs_inode.h>
52 #include <fs/ntfs/ntfs_vfsops.h>
53 #include <fs/ntfs/ntfs_subr.h>
54 #include <fs/ntfs/ntfs_compr.h>
55 #include <fs/ntfs/ntfs_ihash.h>
56
57 #ifdef NTFS_DEBUG
58 int ntfs_debug = NTFS_DEBUG;
59 #endif
60
61 MALLOC_JUSTDEFINE(M_NTFSNTVATTR, "NTFS vattr",
62 "NTFS file attribute information");
63 MALLOC_JUSTDEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
64 MALLOC_JUSTDEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
65 MALLOC_JUSTDEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
66
67 /* Local struct used in ntfs_ntlookupfile() */
68 struct ntfs_lookup_ctx {
69 u_int32_t aoff;
70 u_int32_t rdsize;
71 cn_t cn;
72 struct ntfs_lookup_ctx *prev;
73 };
74
75 static int ntfs_ntlookupattr(struct ntfsmount *, const char *, int,
76 int *, char **);
77 static int ntfs_findvattr(struct ntfsmount *, struct ntnode *,
78 struct ntvattr **, struct ntvattr **, u_int32_t, const char *,
79 size_t, cn_t);
80 static int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t,
81 const char *, size_t);
82 static int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t,
83 const char *, size_t);
84
85 /* table for mapping Unicode chars into uppercase; it's filled upon first
86 * ntfs mount, freed upon last ntfs umount */
87 static wchar *ntfs_toupper_tab;
88 #define NTFS_U28(ch) ((((ch) & 0xE0) == 0) ? '_' : (ch) & 0xFF)
89 #define NTFS_TOUPPER(ch) (ntfs_toupper_tab[(unsigned char)(ch)])
90 static kmutex_t ntfs_toupper_lock;
91 static signed int ntfs_toupper_usecount;
92
93 /* support macro for ntfs_ntvattrget() */
94 #define NTFS_AALPCMP(aalp,type,name,namelen) ( \
95 (aalp->al_type == type) && (aalp->al_namelen == namelen) && \
96 !ntfs_uastrcmp(ntmp, aalp->al_name,aalp->al_namelen,name,namelen) )
97
98 /*
99 *
100 */
101 int
102 ntfs_ntvattrrele(struct ntvattr * vap)
103 {
104 dprintf(("ntfs_ntvattrrele: ino: %llu, type: 0x%x\n",
105 (unsigned long long)vap->va_ip->i_number, vap->va_type));
106
107 ntfs_ntrele(vap->va_ip);
108
109 return (0);
110 }
111
112 /*
113 * find the attribute in the ntnode
114 */
115 static int
116 ntfs_findvattr(struct ntfsmount *ntmp, struct ntnode *ip, struct ntvattr **lvapp, struct ntvattr **vapp, u_int32_t type, const char *name, size_t namelen, cn_t vcn)
117 {
118 int error;
119 struct ntvattr *vap;
120
121 if((ip->i_flag & IN_LOADED) == 0) {
122 dprintf(("ntfs_findvattr: node not loaded, ino: %llu\n",
123 (unsigned long long)ip->i_number));
124 error = ntfs_loadntnode(ntmp,ip);
125 if (error) {
126 printf("ntfs_findvattr: FAILED TO LOAD INO: %llu\n",
127 (unsigned long long)ip->i_number);
128 return (error);
129 }
130 }
131
132 *lvapp = NULL;
133 *vapp = NULL;
134 for (vap = ip->i_valist.lh_first; vap; vap = vap->va_list.le_next) {
135 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %qu - %qu\n",
136 vap->va_type, (long long) vap->va_vcnstart,
137 (long long) vap->va_vcnend));
138 if ((vap->va_type == type) &&
139 (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
140 (vap->va_namelen == namelen) &&
141 (strncmp(name, vap->va_name, namelen) == 0)) {
142 *vapp = vap;
143 ntfs_ntref(vap->va_ip);
144 return (0);
145 }
146 if (vap->va_type == NTFS_A_ATTRLIST)
147 *lvapp = vap;
148 }
149
150 return (-1);
151 }
152
153 /*
154 * Search attribute specified in ntnode (load ntnode if necessary).
155 * If not found but ATTR_A_ATTRLIST present, read it in and search through.
156 * VOP_VGET node needed, and lookup through its ntnode (load if nessesary).
157 *
158 * ntnode should be locked
159 */
160 int
161 ntfs_ntvattrget(
162 struct ntfsmount * ntmp,
163 struct ntnode * ip,
164 u_int32_t type,
165 const char *name,
166 cn_t vcn,
167 struct ntvattr ** vapp)
168 {
169 struct ntvattr *lvap = NULL;
170 struct attr_attrlist *aalp;
171 struct attr_attrlist *nextaalp;
172 struct vnode *newvp;
173 struct ntnode *newip;
174 void * alpool;
175 size_t namelen, len;
176 int error;
177
178 *vapp = NULL;
179
180 if (name) {
181 dprintf(("ntfs_ntvattrget: "
182 "ino: %llu, type: 0x%x, name: %s, vcn: %qu\n",
183 (unsigned long long)ip->i_number, type, name,
184 (long long)vcn));
185 namelen = strlen(name);
186 } else {
187 dprintf(("ntfs_ntvattrget: "
188 "ino: %llu, type: 0x%x, vcn: %qu\n",
189 (unsigned long long)ip->i_number, type, (long long)vcn));
190 name = "";
191 namelen = 0;
192 }
193
194 error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
195 if (error >= 0)
196 return (error);
197
198 if (!lvap) {
199 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: "
200 "ino: %llu, type: 0x%x, name: %s, vcn: %qu\n",
201 (unsigned long long)ip->i_number, type, name,
202 (long long)vcn));
203 return (ENOENT);
204 }
205 /* Scan $ATTRIBUTE_LIST for requested attribute */
206 len = lvap->va_datalen;
207 alpool = (void *) malloc(len, M_TEMP, M_WAITOK);
208 error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
209 NULL);
210 if (error)
211 goto out;
212
213 aalp = (struct attr_attrlist *) alpool;
214 nextaalp = NULL;
215
216 for(; len > 0; aalp = nextaalp) {
217 KASSERT(aalp != NULL);
218 dprintf(("ntfs_ntvattrget: "
219 "attrlist: ino: %d, attr: 0x%x, vcn: %qu\n",
220 aalp->al_inumber, aalp->al_type,
221 (long long) aalp->al_vcnstart));
222
223 if (len > aalp->reclen) {
224 nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
225 } else {
226 nextaalp = NULL;
227 }
228 len -= aalp->reclen;
229
230 if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
231 (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
232 NTFS_AALPCMP(nextaalp, type, name, namelen)))
233 continue;
234
235 dprintf(("ntfs_ntvattrget: attribute in ino: %d\n",
236 aalp->al_inumber));
237
238 /* this is not a main record, so we can't use just plain
239 vget() */
240 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
241 NTFS_A_DATA, NULL, LK_EXCLUSIVE,
242 VG_EXT, &newvp);
243 if (error) {
244 printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
245 aalp->al_inumber);
246 goto out;
247 }
248 newip = VTONT(newvp);
249 /* XXX have to lock ntnode */
250 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
251 type, name, namelen, vcn);
252 vput(newvp);
253 if (error == 0)
254 goto out;
255 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
256 break;
257 }
258 error = ENOENT;
259
260 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: "
261 "ino: %llu, type: 0x%x, name: %.*s, vcn: %qu\n",
262 (unsigned long long)ip->i_number, type, (int)namelen,
263 name, (long long)vcn));
264 out:
265 free(alpool, M_TEMP);
266 return (error);
267 }
268
269 /*
270 * Read ntnode from disk, make ntvattr list.
271 *
272 * ntnode should be locked
273 */
274 int
275 ntfs_loadntnode(
276 struct ntfsmount * ntmp,
277 struct ntnode * ip)
278 {
279 struct filerec *mfrp;
280 daddr_t bn;
281 int error,off;
282 struct attr *ap;
283 struct ntvattr *nvap;
284
285 dprintf(("ntfs_loadntnode: loading ino: %llu\n",
286 (unsigned long long)ip->i_number));
287
288 mfrp = (struct filerec *) malloc(ntfs_bntob(ntmp->ntm_bpmftrec),
289 M_TEMP, M_WAITOK);
290
291 if (ip->i_number < NTFS_SYSNODESNUM) {
292 struct buf *bp;
293
294 dprintf(("ntfs_loadntnode: read system node\n"));
295
296 bn = ntfs_cntobn(ntmp->ntm_mftcn) +
297 ntmp->ntm_bpmftrec * ip->i_number;
298
299 error = bread(ntmp->ntm_devvp,
300 bn, ntfs_bntob(ntmp->ntm_bpmftrec),
301 NOCRED, 0, &bp);
302 if (error) {
303 printf("ntfs_loadntnode: BREAD FAILED\n");
304 brelse(bp, 0);
305 goto out;
306 }
307 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
308 bqrelse(bp);
309 } else {
310 struct vnode *vp;
311
312 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
313 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
314 ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
315 ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
316 if (error) {
317 printf("ntfs_loadntnode: ntfs_readattr failed\n");
318 goto out;
319 }
320 }
321
322 /* Check if magic and fixups are correct */
323 error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (void *)mfrp,
324 ntfs_bntob(ntmp->ntm_bpmftrec));
325 if (error) {
326 printf("ntfs_loadntnode: BAD MFT RECORD %d\n",
327 (u_int32_t) ip->i_number);
328 goto out;
329 }
330
331 dprintf(("ntfs_loadntnode: load attrs for ino: %llu\n",
332 (unsigned long long)ip->i_number));
333 off = mfrp->fr_attroff;
334 ap = (struct attr *) ((char *)mfrp + off);
335
336 LIST_INIT(&ip->i_valist);
337
338 while (ap->a_hdr.a_type != -1) {
339 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
340 if (error)
341 break;
342 nvap->va_ip = ip;
343
344 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
345
346 off += ap->a_hdr.reclen;
347 ap = (struct attr *) ((char *)mfrp + off);
348 }
349 if (error) {
350 printf("ntfs_loadntnode: failed to load attr ino: %llu\n",
351 (unsigned long long)ip->i_number);
352 goto out;
353 }
354
355 ip->i_mainrec = mfrp->fr_mainrec;
356 ip->i_nlink = mfrp->fr_nlink;
357 ip->i_frflag = mfrp->fr_flags;
358
359 ip->i_flag |= IN_LOADED;
360
361 out:
362 free(mfrp, M_TEMP);
363 return (error);
364 }
365
366 /*
367 * Routine locks ntnode and increase usecount, just opposite of
368 * ntfs_ntput().
369 */
370 int
371 ntfs_ntget(struct ntnode *ip)
372 {
373 dprintf(("ntfs_ntget: get ntnode %llu: %p, usecount: %d\n",
374 (unsigned long long)ip->i_number, ip, ip->i_usecount));
375
376 mutex_enter(&ip->i_interlock);
377 ip->i_usecount++;
378 while (ip->i_busy != 0) {
379 cv_wait(&ip->i_lock, &ip->i_interlock);
380 }
381 ip->i_busy = 1;
382 mutex_exit(&ip->i_interlock);
383
384 return 0;
385 }
386
387 /*
388 * Routine search ntnode in hash, if found: lock, inc usecount and return.
389 * If not in hash allocate structure for ntnode, prefill it, lock,
390 * inc count and return.
391 *
392 * ntnode returned locked
393 */
394 int
395 ntfs_ntlookup(
396 struct ntfsmount * ntmp,
397 ino_t ino,
398 struct ntnode ** ipp)
399 {
400 struct ntnode *ip;
401
402 dprintf(("ntfs_ntlookup: looking for ntnode %llu\n",
403 (unsigned long long)ino));
404
405 if ((*ipp = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
406 ntfs_ntget(*ipp);
407 dprintf(("ntfs_ntlookup: ntnode %llu: %p,"
408 " usecount: %d\n",
409 (unsigned long long)ino, *ipp, (*ipp)->i_usecount));
410 return (0);
411 }
412
413 ip = malloc(sizeof(struct ntnode), M_NTFSNTNODE, M_WAITOK|M_ZERO);
414 ddprintf(("ntfs_ntlookup: allocating ntnode: %llu: %p\n",
415 (unsigned long long)ino, ip));
416
417 mutex_enter(&ntfs_hashlock);
418 if ((*ipp = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
419 mutex_exit(&ntfs_hashlock);
420 ntfs_ntget(*ipp);
421 free(ip, M_NTFSNTNODE);
422 dprintf(("ntfs_ntlookup: ntnode %llu: %p,"
423 " usecount: %d\n",
424 (unsigned long long)ino, *ipp, (*ipp)->i_usecount));
425 return (0);
426 }
427
428 /* Generic initialization */
429 ip->i_devvp = ntmp->ntm_devvp;
430 ip->i_dev = ntmp->ntm_dev;
431 ip->i_number = ino;
432 ip->i_mp = ntmp;
433
434 LIST_INIT(&ip->i_fnlist);
435
436 /* init lock and lock the newborn ntnode */
437 cv_init(&ip->i_lock, "ntfslk");
438 mutex_init(&ip->i_interlock, MUTEX_DEFAULT, IPL_NONE);
439 ntfs_ntget(ip);
440
441 ntfs_nthashins(ip);
442
443 mutex_exit(&ntfs_hashlock);
444
445 *ipp = ip;
446
447 dprintf(("ntfs_ntlookup: ntnode %llu: %p, usecount: %d\n",
448 (unsigned long long)ino, ip, ip->i_usecount));
449
450 return (0);
451 }
452
453 /*
454 * Decrement usecount of ntnode and unlock it, if usecount reach zero,
455 * deallocate ntnode.
456 *
457 * ntnode should be locked on entry, and unlocked on return.
458 */
459 void
460 ntfs_ntput(struct ntnode *ip)
461 {
462 struct ntvattr *vap;
463
464 dprintf(("ntfs_ntput: rele ntnode %llu: %p, usecount: %d\n",
465 (unsigned long long)ip->i_number, ip, ip->i_usecount));
466
467 mutex_enter(&ip->i_interlock);
468 ip->i_usecount--;
469
470 #ifdef DIAGNOSTIC
471 if (ip->i_usecount < 0) {
472 panic("ntfs_ntput: ino: %llu usecount: %d ",
473 (unsigned long long)ip->i_number, ip->i_usecount);
474 }
475 #endif
476
477 ip->i_busy = 0;
478 cv_signal(&ip->i_lock);
479 mutex_exit(&ip->i_interlock);
480
481 if (ip->i_usecount == 0) {
482 dprintf(("ntfs_ntput: deallocating ntnode: %llu\n",
483 (unsigned long long)ip->i_number));
484
485 if (ip->i_fnlist.lh_first)
486 panic("ntfs_ntput: ntnode has fnodes");
487
488 ntfs_nthashrem(ip);
489
490 while (ip->i_valist.lh_first != NULL) {
491 vap = ip->i_valist.lh_first;
492 LIST_REMOVE(vap,va_list);
493 ntfs_freentvattr(vap);
494 }
495 mutex_destroy(&ip->i_interlock);
496 cv_destroy(&ip->i_lock);
497 free(ip, M_NTFSNTNODE);
498 }
499 }
500
501 /*
502 * increment usecount of ntnode
503 */
504 void
505 ntfs_ntref(struct ntnode *ip)
506 {
507 mutex_enter(&ip->i_interlock);
508 ip->i_usecount++;
509 mutex_exit(&ip->i_interlock);
510
511 dprintf(("ntfs_ntref: ino %llu, usecount: %d\n",
512 (unsigned long long)ip->i_number, ip->i_usecount));
513
514 }
515
516 /*
517 * Decrement usecount of ntnode.
518 */
519 void
520 ntfs_ntrele(struct ntnode *ip)
521 {
522 dprintf(("ntfs_ntrele: rele ntnode %llu: %p, usecount: %d\n",
523 (unsigned long long)ip->i_number, ip, ip->i_usecount));
524
525 mutex_enter(&ip->i_interlock);
526 ip->i_usecount--;
527
528 if (ip->i_usecount < 0)
529 panic("ntfs_ntrele: ino: %llu usecount: %d ",
530 (unsigned long long)ip->i_number, ip->i_usecount);
531 mutex_exit(&ip->i_interlock);
532 }
533
534 /*
535 * Deallocate all memory allocated for ntvattr
536 */
537 void
538 ntfs_freentvattr(struct ntvattr * vap)
539 {
540 if (vap->va_flag & NTFS_AF_INRUN) {
541 if (vap->va_vruncn)
542 free(vap->va_vruncn, M_NTFSRUN);
543 if (vap->va_vruncl)
544 free(vap->va_vruncl, M_NTFSRUN);
545 } else {
546 if (vap->va_datap)
547 free(vap->va_datap, M_NTFSRDATA);
548 }
549 free(vap, M_NTFSNTVATTR);
550 }
551
552 /*
553 * Convert disk image of attribute into ntvattr structure,
554 * runs are expanded also.
555 */
556 int
557 ntfs_attrtontvattr(
558 struct ntfsmount * ntmp,
559 struct ntvattr ** rvapp,
560 struct attr * rap)
561 {
562 int error, i;
563 struct ntvattr *vap;
564
565 error = 0;
566 *rvapp = NULL;
567
568 vap = malloc(sizeof(struct ntvattr), M_NTFSNTVATTR, M_WAITOK|M_ZERO);
569 vap->va_ip = NULL;
570 vap->va_flag = rap->a_hdr.a_flag;
571 vap->va_type = rap->a_hdr.a_type;
572 vap->va_compression = rap->a_hdr.a_compression;
573 vap->va_index = rap->a_hdr.a_index;
574
575 ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
576
577 vap->va_namelen = rap->a_hdr.a_namelen;
578 if (rap->a_hdr.a_namelen) {
579 wchar *unp = (wchar *)((char *)rap + rap->a_hdr.a_nameoff);
580 ddprintf((", name:["));
581 for (i = 0; i < vap->va_namelen; i++) {
582 vap->va_name[i] = unp[i];
583 ddprintf(("%c", vap->va_name[i]));
584 }
585 ddprintf(("]"));
586 }
587 if (vap->va_flag & NTFS_AF_INRUN) {
588 ddprintf((", nonres."));
589 vap->va_datalen = rap->a_nr.a_datalen;
590 vap->va_allocated = rap->a_nr.a_allocated;
591 vap->va_vcnstart = rap->a_nr.a_vcnstart;
592 vap->va_vcnend = rap->a_nr.a_vcnend;
593 vap->va_compressalg = rap->a_nr.a_compressalg;
594 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
595 &(vap->va_vruncnt),
596 (u_int8_t *) rap + rap->a_nr.a_dataoff);
597 } else {
598 vap->va_compressalg = 0;
599 ddprintf((", res."));
600 vap->va_datalen = rap->a_r.a_datalen;
601 vap->va_allocated = rap->a_r.a_datalen;
602 vap->va_vcnstart = 0;
603 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
604 vap->va_datap = (void *) malloc(vap->va_datalen,
605 M_NTFSRDATA, M_WAITOK);
606 memcpy(vap->va_datap, (char *)rap + rap->a_r.a_dataoff,
607 rap->a_r.a_datalen);
608 }
609 ddprintf((", len: %qu", (long long)vap->va_datalen));
610
611 if (error)
612 free(vap, M_NTFSNTVATTR);
613 else
614 *rvapp = vap;
615
616 ddprintf(("\n"));
617
618 return (error);
619 }
620
621 /*
622 * Expand run into more utilizable and more memory eating format.
623 */
624 int
625 ntfs_runtovrun(
626 cn_t ** rcnp,
627 cn_t ** rclp,
628 u_long * rcntp,
629 u_int8_t * run)
630 {
631 u_int32_t off;
632 u_int32_t sz, i;
633 cn_t *cn;
634 cn_t *cl;
635 u_long cnt;
636 cn_t prev;
637 cn_t tmp;
638
639 off = 0;
640 cnt = 0;
641 i = 0;
642 while (run[off]) {
643 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
644 cnt++;
645 }
646 cn = (cn_t *) malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
647 cl = (cn_t *) malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
648
649 off = 0;
650 cnt = 0;
651 prev = 0;
652 while (run[off]) {
653
654 sz = run[off++];
655 cl[cnt] = 0;
656
657 for (i = 0; i < (sz & 0xF); i++)
658 cl[cnt] += (u_int32_t) run[off++] << (i << 3);
659
660 sz >>= 4;
661 if (run[off + sz - 1] & 0x80) {
662 tmp = ((u_int64_t) - 1) << (sz << 3);
663 for (i = 0; i < sz; i++)
664 tmp |= (u_int64_t) run[off++] << (i << 3);
665 } else {
666 tmp = 0;
667 for (i = 0; i < sz; i++)
668 tmp |= (u_int64_t) run[off++] << (i << 3);
669 }
670 if (tmp)
671 prev = cn[cnt] = prev + tmp;
672 else
673 cn[cnt] = tmp;
674
675 cnt++;
676 }
677 *rcnp = cn;
678 *rclp = cl;
679 *rcntp = cnt;
680 return (0);
681 }
682
683 /*
684 * Compare unicode and ascii string case insens.
685 */
686 static int
687 ntfs_uastricmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen, const char *astr, size_t astrlen)
688 {
689 size_t i;
690 int res;
691
692 for (i = 0; i < ustrlen && astrlen > 0; i++) {
693 res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i]),
694 NTFS_TOUPPER((*ntmp->ntm_wget)(&astr, &astrlen)) );
695 if (res)
696 return res;
697 }
698
699 if (i == ustrlen && astrlen == 0)
700 return 0;
701 else if (i == ustrlen)
702 return -1;
703 else
704 return 1;
705 }
706
707 /*
708 * Compare unicode and ascii string case sens.
709 */
710 static int
711 ntfs_uastrcmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen, const char *astr, size_t astrlen)
712 {
713 size_t i;
714 int res;
715
716 for (i = 0; (i < ustrlen) && astrlen > 0; i++) {
717 res = (*ntmp->ntm_wcmp)(ustr[i],
718 (*ntmp->ntm_wget)(&astr, &astrlen));
719 if (res)
720 return res;
721 }
722
723 if (i == ustrlen && astrlen == 0)
724 return 0;
725 else if (i == ustrlen)
726 return -1;
727 else
728 return 1;
729 }
730
731 /*
732 * Search fnode in ntnode, if not found allocate and preinitialize.
733 *
734 * ntnode should be locked on entry.
735 */
736 int
737 ntfs_fget(
738 struct ntfsmount *ntmp,
739 struct ntnode *ip,
740 int attrtype,
741 char *attrname,
742 struct fnode **fpp
743 )
744 {
745 struct fnode *fp;
746
747 dprintf(("ntfs_fget: ino: %llu, attrtype: 0x%x, attrname: %s\n",
748 (unsigned long long)ip->i_number, attrtype, attrname?attrname:""));
749 *fpp = NULL;
750 for (fp = ip->i_fnlist.lh_first; fp != NULL; fp = fp->f_fnlist.le_next){
751 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
752 fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
753
754 if ((attrtype == fp->f_attrtype) &&
755 ((!attrname && !fp->f_attrname) ||
756 (attrname && fp->f_attrname &&
757 !strcmp(attrname,fp->f_attrname)))){
758 dprintf(("ntfs_fget: found existed: %p\n",fp));
759 *fpp = fp;
760 }
761 }
762
763 if (*fpp)
764 return (0);
765
766 fp = malloc(sizeof(struct fnode), M_NTFSFNODE, M_WAITOK|M_ZERO);
767 dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
768
769 fp->f_ip = ip;
770 fp->f_attrname = attrname;
771 if (fp->f_attrname) fp->f_flag |= FN_AATTRNAME;
772 fp->f_attrtype = attrtype;
773
774 ntfs_ntref(ip);
775
776 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
777
778 *fpp = fp;
779
780 return (0);
781 }
782
783 /*
784 * Deallocate fnode, remove it from ntnode's fnode list.
785 *
786 * ntnode should be locked.
787 */
788 void
789 ntfs_frele(
790 struct fnode *fp)
791 {
792 struct ntnode *ip = FTONT(fp);
793
794 dprintf(("ntfs_frele: fnode: %p for %llu: %p\n", fp,
795 (unsigned long long)ip->i_number, ip));
796
797 dprintf(("ntfs_frele: deallocating fnode\n"));
798 LIST_REMOVE(fp,f_fnlist);
799 if (fp->f_flag & FN_AATTRNAME)
800 free(fp->f_attrname, M_TEMP);
801 if (fp->f_dirblbuf)
802 free(fp->f_dirblbuf, M_NTFSDIR);
803 free(fp, M_NTFSFNODE);
804 ntfs_ntrele(ip);
805 }
806
807 /*
808 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME],
809 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
810 * If $ATTR_TYPE not specified, ATTR_A_DATA assumed.
811 */
812 static int
813 ntfs_ntlookupattr(
814 struct ntfsmount * ntmp,
815 const char * name,
816 int namelen,
817 int *attrtype,
818 char **attrname)
819 {
820 const char *sys;
821 size_t syslen, i;
822 struct ntvattrdef *adp;
823
824 if (namelen == 0)
825 return (0);
826
827 if (name[0] == '$') {
828 sys = name;
829 for (syslen = 0; syslen < namelen; syslen++) {
830 if(sys[syslen] == ':') {
831 name++;
832 namelen--;
833 break;
834 }
835 }
836 name += syslen;
837 namelen -= syslen;
838
839 adp = ntmp->ntm_ad;
840 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
841 if (syslen != adp->ad_namelen ||
842 strncmp(sys, adp->ad_name, syslen) != 0)
843 continue;
844
845 *attrtype = adp->ad_type;
846 goto out;
847 }
848 return (ENOENT);
849 }
850
851 out:
852 if (namelen) {
853 *attrname = (char *) malloc(namelen, M_TEMP, M_WAITOK);
854 memcpy((*attrname), name, namelen);
855 (*attrname)[namelen] = '\0';
856 *attrtype = NTFS_A_DATA;
857 }
858
859 return (0);
860 }
861
862 /*
863 * Lookup specified node for filename, matching cnp,
864 * return fnode filled.
865 */
866 int
867 ntfs_ntlookupfile(
868 struct ntfsmount * ntmp,
869 struct vnode * vp,
870 struct componentname * cnp,
871 struct vnode ** vpp)
872 {
873 struct fnode *fp = VTOF(vp);
874 struct ntnode *ip = FTONT(fp);
875 struct ntvattr *vap; /* Root attribute */
876 cn_t cn = 0; /* VCN in current attribute */
877 void * rdbuf; /* Buffer to read directory's blocks */
878 u_int32_t blsize;
879 u_int32_t rdsize; /* Length of data to read from current block */
880 struct attr_indexentry *iep;
881 int error, res, anamelen, fnamelen;
882 const char *fname,*aname;
883 u_int32_t aoff;
884 int attrtype = NTFS_A_DATA;
885 char *attrname = NULL;
886 struct fnode *nfp;
887 struct vnode *nvp;
888 enum vtype f_type;
889 int fullscan = 0;
890 struct ntfs_lookup_ctx *lookup_ctx = NULL, *tctx;
891
892 error = ntfs_ntget(ip);
893 if (error)
894 return (error);
895
896 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
897 if (error || (vap->va_flag & NTFS_AF_INRUN))
898 return (ENOTDIR);
899
900 /*
901 * Divide file name into: foofilefoofilefoofile[:attrspec]
902 * Store like this: fname:fnamelen [aname:anamelen]
903 */
904 fname = cnp->cn_nameptr;
905 aname = NULL;
906 anamelen = 0;
907 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
908 if(fname[fnamelen] == ':') {
909 aname = fname + fnamelen + 1;
910 anamelen = cnp->cn_namelen - fnamelen - 1;
911 dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
912 fname, fnamelen, aname, anamelen));
913 break;
914 }
915
916 blsize = vap->va_a_iroot->ir_size;
917 dprintf(("ntfs_ntlookupfile: blksz: %d\n", blsize));
918
919 rdbuf = (void *) malloc(blsize, M_TEMP, M_WAITOK);
920
921 loop:
922 rdsize = vap->va_datalen;
923 dprintf(("ntfs_ntlookupfile: rdsz: %d\n", rdsize));
924
925 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
926 0, rdsize, rdbuf, NULL);
927 if (error)
928 goto fail;
929
930 aoff = sizeof(struct attr_indexroot);
931
932 do {
933 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff);
934
935 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
936 aoff += iep->reclen,
937 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff))
938 {
939 ddprintf(("scan: %d, %d\n",
940 (u_int32_t) iep->ie_number,
941 (u_int32_t) iep->ie_fnametype));
942
943 /* check the name - the case-insensitive check
944 * has to come first, to break from this for loop
945 * if needed, so we can dive correctly */
946 res = ntfs_uastricmp(ntmp, iep->ie_fname,
947 iep->ie_fnamelen, fname, fnamelen);
948 if (!fullscan) {
949 if (res > 0) break;
950 if (res < 0) continue;
951 }
952
953 if (iep->ie_fnametype == 0 ||
954 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
955 {
956 res = ntfs_uastrcmp(ntmp, iep->ie_fname,
957 iep->ie_fnamelen, fname, fnamelen);
958 if (res != 0 && !fullscan) continue;
959 }
960
961 /* if we perform full scan, the file does not match
962 * and this is subnode, dive */
963 if (fullscan && res != 0) {
964 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
965 tctx = malloc(sizeof(struct ntfs_lookup_ctx),
966 M_TEMP, M_WAITOK);
967 tctx->aoff = aoff + iep->reclen;
968 tctx->rdsize = rdsize;
969 tctx->cn = cn;
970 tctx->prev = lookup_ctx;
971 lookup_ctx = tctx;
972 break;
973 } else
974 continue;
975 }
976
977 if (aname) {
978 error = ntfs_ntlookupattr(ntmp,
979 aname, anamelen,
980 &attrtype, &attrname);
981 if (error)
982 goto fail;
983 }
984
985 /* Check if we've found ourselves */
986 if ((iep->ie_number == ip->i_number) &&
987 (attrtype == fp->f_attrtype) &&
988 ((!attrname && !fp->f_attrname) ||
989 (attrname && fp->f_attrname &&
990 !strcmp(attrname, fp->f_attrname))))
991 {
992 vref(vp);
993 *vpp = vp;
994 error = 0;
995 goto fail;
996 }
997
998 /* free the buffer returned by ntfs_ntlookupattr() */
999 if (attrname) {
1000 free(attrname, M_TEMP);
1001 attrname = NULL;
1002 }
1003
1004 /* vget node, but don't load it */
1005 error = ntfs_vgetex(ntmp->ntm_mountp,
1006 iep->ie_number, attrtype, attrname,
1007 LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
1008 &nvp);
1009 if (error)
1010 goto fail;
1011
1012 nfp = VTOF(nvp);
1013
1014 if (nfp->f_flag & FN_VALID) {
1015 *vpp = nvp;
1016 goto fail;
1017 }
1018
1019 nfp->f_fflag = iep->ie_fflag;
1020 nfp->f_pnumber = iep->ie_fpnumber;
1021 nfp->f_times = iep->ie_ftimes;
1022
1023 if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
1024 (nfp->f_attrtype == NTFS_A_DATA) &&
1025 (nfp->f_attrname == NULL))
1026 f_type = VDIR;
1027 else
1028 f_type = VREG;
1029
1030 nvp->v_type = f_type;
1031
1032 if ((nfp->f_attrtype == NTFS_A_DATA) &&
1033 (nfp->f_attrname == NULL))
1034 {
1035 /* Opening default attribute */
1036 nfp->f_size = iep->ie_fsize;
1037 nfp->f_allocated = iep->ie_fallocated;
1038 nfp->f_flag |= FN_PRELOADED;
1039 uvm_vnp_setsize(nvp, iep->ie_fsize);
1040 } else {
1041 error = ntfs_filesize(ntmp, nfp,
1042 &nfp->f_size, &nfp->f_allocated);
1043 if (error) {
1044 vput(nvp);
1045 goto fail;
1046 }
1047 uvm_vnp_setsize(nvp, nfp->f_size);
1048 }
1049
1050 nfp->f_flag &= ~FN_VALID;
1051 *vpp = nvp;
1052 goto fail;
1053 }
1054
1055 /* Dive if possible */
1056 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
1057 dprintf(("ntfs_ntlookupfile: diving\n"));
1058
1059 cn = *(cn_t *) ((char *)rdbuf + aoff +
1060 iep->reclen - sizeof(cn_t));
1061 rdsize = blsize;
1062
1063 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
1064 ntfs_cntob(cn), rdsize, rdbuf, NULL);
1065 if (error)
1066 goto fail;
1067
1068 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1069 rdbuf, rdsize);
1070 if (error)
1071 goto fail;
1072
1073 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
1074 0x18);
1075 } else if (fullscan && lookup_ctx) {
1076 cn = lookup_ctx->cn;
1077 aoff = lookup_ctx->aoff;
1078 rdsize = lookup_ctx->rdsize;
1079
1080 error = ntfs_readattr(ntmp, ip,
1081 (cn == 0) ? NTFS_A_INDXROOT : NTFS_A_INDX,
1082 "$I30", ntfs_cntob(cn), rdsize, rdbuf, NULL);
1083 if (error)
1084 goto fail;
1085
1086 if (cn != 0) {
1087 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1088 rdbuf, rdsize);
1089 if (error)
1090 goto fail;
1091 }
1092
1093 tctx = lookup_ctx;
1094 lookup_ctx = lookup_ctx->prev;
1095 free(tctx, M_TEMP);
1096 } else {
1097 dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
1098 error = ENOENT;
1099 break;
1100 }
1101 } while (1);
1102
1103 /* perform full scan if no entry was found */
1104 if (!fullscan && error == ENOENT) {
1105 fullscan = 1;
1106 cn = 0; /* need zero, used by lookup_ctx */
1107
1108 ddprintf(("ntfs_ntlookupfile: fullscan performed for: %.*s\n",
1109 (int) fnamelen, fname));
1110 goto loop;
1111 }
1112
1113 dprintf(("finish\n"));
1114
1115 fail:
1116 if (attrname)
1117 free(attrname, M_TEMP);
1118 if (lookup_ctx) {
1119 while(lookup_ctx) {
1120 tctx = lookup_ctx;
1121 lookup_ctx = lookup_ctx->prev;
1122 free(tctx, M_TEMP);
1123 }
1124 }
1125 ntfs_ntvattrrele(vap);
1126 ntfs_ntput(ip);
1127 free(rdbuf, M_TEMP);
1128 return (error);
1129 }
1130
1131 /*
1132 * Check if name type is permitted to show.
1133 */
1134 int
1135 ntfs_isnamepermitted(
1136 struct ntfsmount * ntmp,
1137 struct attr_indexentry * iep)
1138 {
1139 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
1140 return 1;
1141
1142 switch (iep->ie_fnametype) {
1143 case 2:
1144 ddprintf(("ntfs_isnamepermitted: skipped DOS name\n"));
1145 return 0;
1146 case 0: case 1: case 3:
1147 return 1;
1148 default:
1149 printf("ntfs_isnamepermitted: "
1150 "WARNING! Unknown file name type: %d\n",
1151 iep->ie_fnametype);
1152 break;
1153 }
1154 return 0;
1155 }
1156
1157 /*
1158 * Read ntfs dir like stream of attr_indexentry, not like btree of them.
1159 * This is done by scanning $BITMAP:$I30 for busy clusters and reading them.
1160 * Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in
1161 * fnode, so we can skip toward record number num almost immediately.
1162 * Anyway this is rather slow routine. The problem is that we don't know
1163 * how many records are there in $INDEX_ALLOCATION:$I30 block.
1164 */
1165 int
1166 ntfs_ntreaddir(
1167 struct ntfsmount * ntmp,
1168 struct fnode * fp,
1169 u_int32_t num,
1170 struct attr_indexentry ** riepp)
1171 {
1172 struct ntnode *ip = FTONT(fp);
1173 struct ntvattr *vap = NULL; /* IndexRoot attribute */
1174 struct ntvattr *bmvap = NULL; /* BitMap attribute */
1175 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */
1176 void * rdbuf; /* Buffer to read directory's blocks */
1177 u_char *bmp = NULL; /* Bitmap */
1178 u_int32_t blsize; /* Index allocation size (2048) */
1179 u_int32_t rdsize; /* Length of data to read */
1180 u_int32_t attrnum; /* Current attribute type */
1181 u_int32_t cpbl = 1; /* Clusters per directory block */
1182 u_int32_t blnum;
1183 struct attr_indexentry *iep;
1184 int error = ENOENT;
1185 u_int32_t aoff, cnum;
1186
1187 dprintf(("ntfs_ntreaddir: read ino: %llu, num: %d\n",
1188 (unsigned long long)ip->i_number, num));
1189 error = ntfs_ntget(ip);
1190 if (error)
1191 return (error);
1192
1193 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
1194 if (error)
1195 return (ENOTDIR);
1196
1197 if (fp->f_dirblbuf == NULL) {
1198 fp->f_dirblsz = vap->va_a_iroot->ir_size;
1199 fp->f_dirblbuf = (void *) malloc(
1200 MAX(vap->va_datalen,fp->f_dirblsz), M_NTFSDIR, M_WAITOK);
1201 }
1202
1203 blsize = fp->f_dirblsz;
1204 rdbuf = fp->f_dirblbuf;
1205
1206 dprintf(("ntfs_ntreaddir: rdbuf: %p, blsize: %d\n", rdbuf, blsize));
1207
1208 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
1209 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
1210 0, &bmvap);
1211 if (error) {
1212 error = ENOTDIR;
1213 goto fail;
1214 }
1215 bmp = (u_char *) malloc(bmvap->va_datalen, M_TEMP, M_WAITOK);
1216 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
1217 bmvap->va_datalen, bmp, NULL);
1218 if (error)
1219 goto fail;
1220
1221 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
1222 0, &iavap);
1223 if (error) {
1224 error = ENOTDIR;
1225 goto fail;
1226 }
1227 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
1228 dprintf(("ntfs_ntreaddir: indexalloc: %qu, cpbl: %d\n",
1229 (long long)iavap->va_datalen, cpbl));
1230 } else {
1231 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
1232 iavap = bmvap = NULL;
1233 bmp = NULL;
1234 }
1235
1236 /* Try use previous values */
1237 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
1238 attrnum = fp->f_lastdattr;
1239 aoff = fp->f_lastdoff;
1240 blnum = fp->f_lastdblnum;
1241 cnum = fp->f_lastdnum;
1242 } else {
1243 attrnum = NTFS_A_INDXROOT;
1244 aoff = sizeof(struct attr_indexroot);
1245 blnum = 0;
1246 cnum = 0;
1247 }
1248
1249 do {
1250 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
1251 attrnum, (u_int32_t) blnum, cnum, num, aoff));
1252 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
1253 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
1254 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
1255 if (error)
1256 goto fail;
1257
1258 if (attrnum == NTFS_A_INDX) {
1259 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1260 rdbuf, rdsize);
1261 if (error)
1262 goto fail;
1263 }
1264 if (aoff == 0)
1265 aoff = (attrnum == NTFS_A_INDX) ?
1266 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
1267 sizeof(struct attr_indexroot);
1268
1269 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff);
1270 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
1271 aoff += iep->reclen,
1272 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff))
1273 {
1274 if (!ntfs_isnamepermitted(ntmp, iep)) continue;
1275
1276 if (cnum >= num) {
1277 fp->f_lastdnum = cnum;
1278 fp->f_lastdoff = aoff;
1279 fp->f_lastdblnum = blnum;
1280 fp->f_lastdattr = attrnum;
1281
1282 *riepp = iep;
1283
1284 error = 0;
1285 goto fail;
1286 }
1287 cnum++;
1288 }
1289
1290 if (iavap) {
1291 if (attrnum == NTFS_A_INDXROOT)
1292 blnum = 0;
1293 else
1294 blnum++;
1295
1296 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
1297 if (bmp[blnum >> 3] & (1 << (blnum & 3)))
1298 break;
1299 blnum++;
1300 }
1301
1302 attrnum = NTFS_A_INDX;
1303 aoff = 0;
1304 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
1305 break;
1306 dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
1307 }
1308 } while (iavap);
1309
1310 *riepp = NULL;
1311 fp->f_lastdnum = 0;
1312
1313 fail:
1314 if (vap)
1315 ntfs_ntvattrrele(vap);
1316 if (bmvap)
1317 ntfs_ntvattrrele(bmvap);
1318 if (iavap)
1319 ntfs_ntvattrrele(iavap);
1320 if (bmp)
1321 free(bmp, M_TEMP);
1322 ntfs_ntput(ip);
1323 return (error);
1324 }
1325
1326 /*
1327 * Convert NTFS times that are in 100 ns units and begins from
1328 * 1601 Jan 1 into unix times.
1329 */
1330 struct timespec
1331 ntfs_nttimetounix(
1332 u_int64_t nt)
1333 {
1334 struct timespec t;
1335
1336 /* WindowNT times are in 100 ns and from 1601 Jan 1 */
1337 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
1338 t.tv_sec = nt / (1000 * 1000 * 10) -
1339 369LL * 365LL * 24LL * 60LL * 60LL -
1340 89LL * 1LL * 24LL * 60LL * 60LL;
1341 return (t);
1342 }
1343
1344 /*
1345 * Get file times from NTFS_A_NAME attribute.
1346 */
1347 int
1348 ntfs_times(
1349 struct ntfsmount * ntmp,
1350 struct ntnode * ip,
1351 ntfs_times_t * tm)
1352 {
1353 struct ntvattr *vap;
1354 int error;
1355
1356 dprintf(("ntfs_times: ino: %llu...\n",
1357 (unsigned long long)ip->i_number));
1358
1359 error = ntfs_ntget(ip);
1360 if (error)
1361 return (error);
1362
1363 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
1364 if (error) {
1365 ntfs_ntput(ip);
1366 return (error);
1367 }
1368 *tm = vap->va_a_name->n_times;
1369 ntfs_ntvattrrele(vap);
1370 ntfs_ntput(ip);
1371
1372 return (0);
1373 }
1374
1375 /*
1376 * Get file sizes from corresponding attribute.
1377 *
1378 * ntnode under fnode should be locked.
1379 */
1380 int
1381 ntfs_filesize(
1382 struct ntfsmount * ntmp,
1383 struct fnode * fp,
1384 u_int64_t * size,
1385 u_int64_t * bytes)
1386 {
1387 struct ntvattr *vap;
1388 struct ntnode *ip = FTONT(fp);
1389 u_int64_t sz, bn;
1390 int error;
1391
1392 dprintf(("ntfs_filesize: ino: %llu\n",
1393 (unsigned long long)ip->i_number));
1394
1395 error = ntfs_ntvattrget(ntmp, ip,
1396 fp->f_attrtype, fp->f_attrname, 0, &vap);
1397 if (error)
1398 return (error);
1399
1400 bn = vap->va_allocated;
1401 sz = vap->va_datalen;
1402
1403 dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
1404 (u_int32_t) sz, (u_int32_t) bn));
1405
1406 if (size)
1407 *size = sz;
1408 if (bytes)
1409 *bytes = bn;
1410
1411 ntfs_ntvattrrele(vap);
1412
1413 return (0);
1414 }
1415
1416 /*
1417 * This is one of write routine.
1418 */
1419 int
1420 ntfs_writeattr_plain(
1421 struct ntfsmount * ntmp,
1422 struct ntnode * ip,
1423 u_int32_t attrnum,
1424 char *attrname,
1425 off_t roff,
1426 size_t rsize,
1427 void *rdata,
1428 size_t * initp,
1429 struct uio *uio)
1430 {
1431 size_t init;
1432 int error = 0;
1433 off_t off = roff, left = rsize, towrite;
1434 void * data = rdata;
1435 struct ntvattr *vap;
1436 *initp = 0;
1437
1438 while (left) {
1439 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1440 ntfs_btocn(off), &vap);
1441 if (error)
1442 return (error);
1443 towrite = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1444 ddprintf(("ntfs_writeattr_plain: o: %qd, s: %qd (%qu - %qu)\n",
1445 (long long) off, (long long) towrite,
1446 (long long) vap->va_vcnstart,
1447 (long long) vap->va_vcnend));
1448 error = ntfs_writentvattr_plain(ntmp, ip, vap,
1449 off - ntfs_cntob(vap->va_vcnstart),
1450 towrite, data, &init, uio);
1451 if (error) {
1452 dprintf(("ntfs_writeattr_plain: "
1453 "ntfs_writentvattr_plain failed: o: %qd, s: %qd\n",
1454 (long long) off, (long long) towrite));
1455 dprintf(("ntfs_writeattr_plain: attrib: %qu - %qu\n",
1456 (long long) vap->va_vcnstart,
1457 (long long) vap->va_vcnend));
1458 ntfs_ntvattrrele(vap);
1459 break;
1460 }
1461 ntfs_ntvattrrele(vap);
1462 left -= towrite;
1463 off += towrite;
1464 data = (char *)data + towrite;
1465 *initp += init;
1466 }
1467
1468 return (error);
1469 }
1470
1471 /*
1472 * This is one of write routine.
1473 *
1474 * ntnode should be locked.
1475 */
1476 int
1477 ntfs_writentvattr_plain(
1478 struct ntfsmount * ntmp,
1479 struct ntnode * ip,
1480 struct ntvattr * vap,
1481 off_t roff,
1482 size_t rsize,
1483 void *rdata,
1484 size_t * initp,
1485 struct uio *uio)
1486 {
1487 int error = 0;
1488 off_t off;
1489 int cnt;
1490 cn_t ccn, ccl, cn, left, cl;
1491 void * data = rdata;
1492 daddr_t lbn;
1493 struct buf *bp;
1494 size_t tocopy;
1495
1496 *initp = 0;
1497
1498 if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
1499 dprintf(("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n"));
1500 return ENOTTY;
1501 }
1502
1503 ddprintf(("ntfs_writentvattr_plain: data in run: %lu chains\n",
1504 vap->va_vruncnt));
1505
1506 off = roff;
1507 left = rsize;
1508 ccl = 0;
1509 ccn = 0;
1510 cnt = 0;
1511 for (; left && (cnt < vap->va_vruncnt); cnt++) {
1512 ccn = vap->va_vruncn[cnt];
1513 ccl = vap->va_vruncl[cnt];
1514
1515 ddprintf(("ntfs_writentvattr_plain: "
1516 "left %qu, cn: 0x%qx, cl: %qu, off: %qd\n",
1517 (long long) left, (long long) ccn,
1518 (long long) ccl, (long long) off));
1519
1520 if (ntfs_cntob(ccl) < off) {
1521 off -= ntfs_cntob(ccl);
1522 cnt++;
1523 continue;
1524 }
1525 if (!ccn && ip->i_number != NTFS_BOOTINO)
1526 continue; /* XXX */
1527
1528 ccl -= ntfs_btocn(off);
1529 cn = ccn + ntfs_btocn(off);
1530 off = ntfs_btocnoff(off);
1531
1532 while (left && ccl) {
1533 /*
1534 * Always read and write single clusters at a time -
1535 * we need to avoid requesting differently-sized
1536 * blocks at the same disk offsets to avoid
1537 * confusing the buffer cache.
1538 */
1539 tocopy = MIN(left, ntfs_cntob(1) - off);
1540 cl = ntfs_btocl(tocopy + off);
1541 KASSERT(cl == 1 && tocopy <= ntfs_cntob(1));
1542 ddprintf(("ntfs_writentvattr_plain: write: "
1543 "cn: 0x%qx cl: %qu, off: %qd len: %qu, left: %qu\n",
1544 (long long) cn, (long long) cl,
1545 (long long) off, (long long) tocopy,
1546 (long long) left));
1547 if ((off == 0) && (tocopy == ntfs_cntob(cl)))
1548 {
1549 lbn = ntfs_cntobn(cn);
1550 bp = getblk(ntmp->ntm_devvp, lbn,
1551 ntfs_cntob(cl), 0, 0);
1552 clrbuf(bp);
1553 } else {
1554 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
1555 ntfs_cntob(cl), NOCRED, B_MODIFY, &bp);
1556 if (error) {
1557 brelse(bp, 0);
1558 return (error);
1559 }
1560 }
1561 if (uio)
1562 uiomove((char *)bp->b_data + off, tocopy, uio);
1563 else
1564 memcpy((char *)bp->b_data + off, data, tocopy);
1565 bawrite(bp);
1566 data = (char *)data + tocopy;
1567 *initp += tocopy;
1568 off = 0;
1569 left -= tocopy;
1570 cn += cl;
1571 ccl -= cl;
1572 }
1573 }
1574
1575 if (left) {
1576 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
1577 error = EINVAL;
1578 }
1579
1580 return (error);
1581 }
1582
1583 /*
1584 * This is one of read routines.
1585 *
1586 * ntnode should be locked.
1587 */
1588 int
1589 ntfs_readntvattr_plain(
1590 struct ntfsmount * ntmp,
1591 struct ntnode * ip,
1592 struct ntvattr * vap,
1593 off_t roff,
1594 size_t rsize,
1595 void *rdata,
1596 size_t * initp,
1597 struct uio *uio)
1598 {
1599 int error = 0;
1600 off_t off;
1601
1602 *initp = 0;
1603 if (vap->va_flag & NTFS_AF_INRUN) {
1604 int cnt;
1605 cn_t ccn, ccl, cn, left, cl;
1606 void * data = rdata;
1607 struct buf *bp;
1608 size_t tocopy;
1609
1610 ddprintf(("ntfs_readntvattr_plain: data in run: %lu chains\n",
1611 vap->va_vruncnt));
1612
1613 off = roff;
1614 left = rsize;
1615 ccl = 0;
1616 ccn = 0;
1617 cnt = 0;
1618 while (left && (cnt < vap->va_vruncnt)) {
1619 ccn = vap->va_vruncn[cnt];
1620 ccl = vap->va_vruncl[cnt];
1621
1622 ddprintf(("ntfs_readntvattr_plain: "
1623 "left %qu, cn: 0x%qx, cl: %qu, off: %qd\n",
1624 (long long) left, (long long) ccn,
1625 (long long) ccl, (long long) off));
1626
1627 if (ntfs_cntob(ccl) < off) {
1628 off -= ntfs_cntob(ccl);
1629 cnt++;
1630 continue;
1631 }
1632 if (ccn || ip->i_number == NTFS_BOOTINO) {
1633 ccl -= ntfs_btocn(off);
1634 cn = ccn + ntfs_btocn(off);
1635 off = ntfs_btocnoff(off);
1636
1637 while (left && ccl) {
1638 /*
1639 * Always read single clusters at a
1640 * time - we need to avoid reading
1641 * differently-sized blocks at the
1642 * same disk offsets to avoid
1643 * confusing the buffer cache.
1644 */
1645 tocopy = MIN(left,
1646 ntfs_cntob(1) - off);
1647 cl = ntfs_btocl(tocopy + off);
1648 KASSERT(cl == 1 &&
1649 tocopy <= ntfs_cntob(1));
1650
1651 ddprintf(("ntfs_readntvattr_plain: "
1652 "read: cn: 0x%qx cl: %qu, "
1653 "off: %qd len: %qu, left: %qu\n",
1654 (long long) cn,
1655 (long long) cl,
1656 (long long) off,
1657 (long long) tocopy,
1658 (long long) left));
1659 error = bread(ntmp->ntm_devvp,
1660 ntfs_cntobn(cn),
1661 ntfs_cntob(cl),
1662 NOCRED, 0, &bp);
1663 if (error) {
1664 brelse(bp, 0);
1665 return (error);
1666 }
1667 if (uio) {
1668 uiomove((char *)bp->b_data + off,
1669 tocopy, uio);
1670 } else {
1671 memcpy(data, (char *)bp->b_data + off,
1672 tocopy);
1673 }
1674 brelse(bp, 0);
1675 data = (char *)data + tocopy;
1676 *initp += tocopy;
1677 off = 0;
1678 left -= tocopy;
1679 cn += cl;
1680 ccl -= cl;
1681 }
1682 } else {
1683 tocopy = MIN(left, ntfs_cntob(ccl) - off);
1684 ddprintf(("ntfs_readntvattr_plain: "
1685 "hole: ccn: 0x%qx ccl: %qu, off: %qd, "
1686 " len: %qu, left: %qu\n",
1687 (long long) ccn, (long long) ccl,
1688 (long long) off, (long long) tocopy,
1689 (long long) left));
1690 left -= tocopy;
1691 off = 0;
1692 if (uio) {
1693 char vbuf[] = "";
1694 size_t remains = tocopy;
1695 for(; remains; remains--)
1696 uiomove(vbuf, 1, uio);
1697 } else
1698 memset(data, 0, tocopy);
1699 data = (char *)data + tocopy;
1700 }
1701 cnt++;
1702 }
1703 if (left) {
1704 printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
1705 error = E2BIG;
1706 }
1707 } else {
1708 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
1709 if (uio)
1710 uiomove((char *)vap->va_datap + roff, rsize, uio);
1711 else
1712 memcpy(rdata, (char *)vap->va_datap + roff, rsize);
1713 *initp += rsize;
1714 }
1715
1716 return (error);
1717 }
1718
1719 /*
1720 * This is one of read routines.
1721 */
1722 int
1723 ntfs_readattr_plain(
1724 struct ntfsmount * ntmp,
1725 struct ntnode * ip,
1726 u_int32_t attrnum,
1727 const char *attrname,
1728 off_t roff,
1729 size_t rsize,
1730 void *rdata,
1731 size_t * initp,
1732 struct uio *uio)
1733 {
1734 size_t init;
1735 int error = 0;
1736 off_t off = roff, left = rsize, toread;
1737 void * data = rdata;
1738 struct ntvattr *vap;
1739 *initp = 0;
1740
1741 while (left) {
1742 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1743 ntfs_btocn(off), &vap);
1744 if (error)
1745 return (error);
1746 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1747 ddprintf(("ntfs_readattr_plain: o: %qd, s: %qd (%qu - %qu)\n",
1748 (long long) off, (long long) toread,
1749 (long long) vap->va_vcnstart,
1750 (long long) vap->va_vcnend));
1751 error = ntfs_readntvattr_plain(ntmp, ip, vap,
1752 off - ntfs_cntob(vap->va_vcnstart),
1753 toread, data, &init, uio);
1754 if (error) {
1755 printf("ntfs_readattr_plain: "
1756 "ntfs_readntvattr_plain failed: o: %qd, s: %qd\n",
1757 (long long) off, (long long) toread);
1758 printf("ntfs_readattr_plain: attrib: %qu - %qu\n",
1759 (long long) vap->va_vcnstart,
1760 (long long) vap->va_vcnend);
1761 ntfs_ntvattrrele(vap);
1762 break;
1763 }
1764 ntfs_ntvattrrele(vap);
1765 left -= toread;
1766 off += toread;
1767 data = (char *)data + toread;
1768 *initp += init;
1769 }
1770
1771 return (error);
1772 }
1773
1774 /*
1775 * This is one of read routines.
1776 */
1777 int
1778 ntfs_readattr(
1779 struct ntfsmount * ntmp,
1780 struct ntnode * ip,
1781 u_int32_t attrnum,
1782 const char *attrname,
1783 off_t roff,
1784 size_t rsize,
1785 void *rdata,
1786 struct uio *uio)
1787 {
1788 int error = 0;
1789 struct ntvattr *vap;
1790 size_t init;
1791
1792 ddprintf(("ntfs_readattr: reading %llu: 0x%x, from %qd size %qu"
1793 " bytes\n", (unsigned long long)ip->i_number, attrnum,
1794 (long long)roff, (long long)rsize));
1795
1796 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
1797 if (error)
1798 return (error);
1799
1800 if ((roff > vap->va_datalen) ||
1801 (roff + rsize > vap->va_datalen)) {
1802 printf("ntfs_readattr: offset too big: %qd (%qd) > %qu\n",
1803 (long long) roff, (long long) (roff + rsize),
1804 (long long) vap->va_datalen);
1805 ntfs_ntvattrrele(vap);
1806 return (E2BIG);
1807 }
1808 if (vap->va_compression && vap->va_compressalg) {
1809 u_int8_t *cup;
1810 u_int8_t *uup;
1811 off_t off = roff, left = rsize, tocopy;
1812 void * data = rdata;
1813 cn_t cn;
1814
1815 ddprintf(("ntfs_ntreadattr: compression: %d\n",
1816 vap->va_compressalg));
1817
1818 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
1819 M_NTFSDECOMP, M_WAITOK);
1820 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
1821 M_NTFSDECOMP, M_WAITOK);
1822
1823 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
1824 off = roff - ntfs_cntob(cn);
1825
1826 while (left) {
1827 error = ntfs_readattr_plain(ntmp, ip, attrnum,
1828 attrname, ntfs_cntob(cn),
1829 ntfs_cntob(NTFS_COMPUNIT_CL),
1830 cup, &init, NULL);
1831 if (error)
1832 break;
1833
1834 tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
1835
1836 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
1837 if (uio)
1838 uiomove(cup + off, tocopy, uio);
1839 else
1840 memcpy(data, cup + off, tocopy);
1841 } else if (init == 0) {
1842 if (uio) {
1843 char vbuf[] = "";
1844 size_t remains = tocopy;
1845 for(; remains; remains--)
1846 uiomove(vbuf, 1, uio);
1847 }
1848 else
1849 memset(data, 0, tocopy);
1850 } else {
1851 error = ntfs_uncompunit(ntmp, uup, cup);
1852 if (error)
1853 break;
1854 if (uio)
1855 uiomove(uup + off, tocopy, uio);
1856 else
1857 memcpy(data, uup + off, tocopy);
1858 }
1859
1860 left -= tocopy;
1861 data = (char *)data + tocopy;
1862 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
1863 cn += NTFS_COMPUNIT_CL;
1864 }
1865
1866 free(uup, M_NTFSDECOMP);
1867 free(cup, M_NTFSDECOMP);
1868 } else
1869 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
1870 roff, rsize, rdata, &init, uio);
1871 ntfs_ntvattrrele(vap);
1872 return (error);
1873 }
1874
1875 #if UNUSED_CODE
1876 int
1877 ntfs_parserun(
1878 cn_t * cn,
1879 cn_t * cl,
1880 u_int8_t * run,
1881 u_long len,
1882 u_long *off)
1883 {
1884 u_int8_t sz;
1885 int i;
1886
1887 if (NULL == run) {
1888 printf("ntfs_parsetun: run == NULL\n");
1889 return (EINVAL);
1890 }
1891 sz = run[(*off)++];
1892 if (0 == sz) {
1893 printf("ntfs_parserun: trying to go out of run\n");
1894 return (E2BIG);
1895 }
1896 *cl = 0;
1897 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1898 printf("ntfs_parserun: "
1899 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1900 sz, len, *off);
1901 return (EINVAL);
1902 }
1903 for (i = 0; i < (sz & 0xF); i++)
1904 *cl += (u_int32_t) run[(*off)++] << (i << 3);
1905
1906 sz >>= 4;
1907 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1908 printf("ntfs_parserun: "
1909 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1910 sz, len, *off);
1911 return (EINVAL);
1912 }
1913 for (i = 0; i < (sz & 0xF); i++)
1914 *cn += (u_int32_t) run[(*off)++] << (i << 3);
1915
1916 return (0);
1917 }
1918 #endif
1919
1920 /*
1921 * Process fixup routine on given buffer.
1922 */
1923 int
1924 ntfs_procfixups(
1925 struct ntfsmount * ntmp,
1926 u_int32_t magic,
1927 void *xbufv,
1928 size_t len)
1929 {
1930 char *xbuf = xbufv;
1931 struct fixuphdr *fhp = (struct fixuphdr *) xbuf;
1932 int i;
1933 u_int16_t fixup;
1934 u_int16_t *fxp;
1935 u_int16_t *cfxp;
1936
1937 if (fhp->fh_magic != magic) {
1938 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
1939 fhp->fh_magic, magic);
1940 return (EINVAL);
1941 }
1942 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
1943 printf("ntfs_procfixups: "
1944 "bad fixups number: %d for %ld bytes block\n",
1945 fhp->fh_fnum, (long)len); /* XXX printf kludge */
1946 return (EINVAL);
1947 }
1948 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
1949 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
1950 return (EINVAL);
1951 }
1952 fxp = (u_int16_t *) (xbuf + fhp->fh_foff);
1953 cfxp = (u_int16_t *) (xbuf + ntmp->ntm_bps - 2);
1954 fixup = *fxp++;
1955 for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
1956 if (*cfxp != fixup) {
1957 printf("ntfs_procfixups: fixup %d doesn't match\n", i);
1958 return (EINVAL);
1959 }
1960 *cfxp = *fxp;
1961 cfxp = (u_int16_t *)((char *)cfxp + ntmp->ntm_bps);
1962 }
1963 return (0);
1964 }
1965
1966 #if UNUSED_CODE
1967 int
1968 ntfs_runtocn(
1969 cn_t * cn,
1970 struct ntfsmount * ntmp,
1971 u_int8_t * run,
1972 u_long len,
1973 cn_t vcn)
1974 {
1975 cn_t ccn = 0;
1976 cn_t ccl = 0;
1977 u_long off = 0;
1978 int error = 0;
1979
1980 #ifdef NTFS_DEBUG
1981 int i;
1982 printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n",
1983 run, len, (u_long) vcn);
1984 printf("ntfs_runtocn: run: ");
1985 for (i = 0; i < len; i++)
1986 printf("0x%02x ", run[i]);
1987 printf("\n");
1988 #endif
1989
1990 if (NULL == run) {
1991 printf("ntfs_runtocn: run == NULL\n");
1992 return (EINVAL);
1993 }
1994 do {
1995 if (run[off] == 0) {
1996 printf("ntfs_runtocn: vcn too big\n");
1997 return (E2BIG);
1998 }
1999 vcn -= ccl;
2000 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
2001 if (error) {
2002 printf("ntfs_runtocn: ntfs_parserun failed\n");
2003 return (error);
2004 }
2005 } while (ccl <= vcn);
2006 *cn = ccn + vcn;
2007 return (0);
2008 }
2009 #endif
2010
2011 /*
2012 * this initializes toupper table & dependant variables to be ready for
2013 * later work
2014 */
2015 void
2016 ntfs_toupper_init(void)
2017 {
2018 ntfs_toupper_tab = (wchar *) NULL;
2019 mutex_init(&ntfs_toupper_lock, MUTEX_DEFAULT, IPL_NONE);
2020 ntfs_toupper_usecount = 0;
2021 }
2022
2023 /*
2024 * if the ntfs_toupper_tab[] is filled already, just raise use count;
2025 * otherwise read the data from the filesystem we are currently mounting
2026 */
2027 int
2028 ntfs_toupper_use(struct mount *mp, struct ntfsmount *ntmp)
2029 {
2030 int error = 0;
2031 struct vnode *vp;
2032
2033 /* get exclusive access */
2034 mutex_enter(&ntfs_toupper_lock);
2035
2036 /* only read the translation data from a file if it hasn't been
2037 * read already */
2038 if (ntfs_toupper_tab)
2039 goto out;
2040
2041 /*
2042 * Read in Unicode lowercase -> uppercase translation file.
2043 * XXX for now, just the first 256 entries are used anyway,
2044 * so don't bother reading more
2045 */
2046 ntfs_toupper_tab = malloc(256 * 256 * sizeof(wchar),
2047 M_NTFSRDATA, M_WAITOK);
2048
2049 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp)))
2050 goto out;
2051 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
2052 0, 256*256*sizeof(wchar), (char *) ntfs_toupper_tab,
2053 NULL);
2054 vput(vp);
2055
2056 out:
2057 ntfs_toupper_usecount++;
2058 mutex_exit(&ntfs_toupper_lock);
2059 return (error);
2060 }
2061
2062 /*
2063 * lower the use count and if it reaches zero, free the memory
2064 * tied by toupper table
2065 */
2066 void
2067 ntfs_toupper_unuse(void)
2068 {
2069 /* get exclusive access */
2070 mutex_enter(&ntfs_toupper_lock);
2071
2072 ntfs_toupper_usecount--;
2073 if (ntfs_toupper_usecount == 0) {
2074 free(ntfs_toupper_tab, M_NTFSRDATA);
2075 ntfs_toupper_tab = NULL;
2076 }
2077 #ifdef DIAGNOSTIC
2078 else if (ntfs_toupper_usecount < 0) {
2079 panic("ntfs_toupper_unuse(): use count negative: %d",
2080 ntfs_toupper_usecount);
2081 }
2082 #endif
2083
2084 /* release the lock */
2085 mutex_exit(&ntfs_toupper_lock);
2086 }
NetBSD on the FriendlyARM MINI2440