1 /* $NetBSD: ntfs_subr.c,v 1.14 2005/02/26 22:58:55 perry 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 1.14 2005/02/26 22:58:55 perry 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 #if defined(__FreeBSD__)
46 #include <machine/clock.h>
47 #endif
48
49 #include <miscfs/specfs/specdev.h>
50
51 /* #define NTFS_DEBUG 1 */
52 #include <fs/ntfs/ntfs.h>
53 #include <fs/ntfs/ntfsmount.h>
54 #include <fs/ntfs/ntfs_inode.h>
55 #include <fs/ntfs/ntfs_vfsops.h>
56 #include <fs/ntfs/ntfs_subr.h>
57 #include <fs/ntfs/ntfs_compr.h>
58 #include <fs/ntfs/ntfs_ihash.h>
59
60 #if defined(NTFS_DEBUG)
61 int ntfs_debug = NTFS_DEBUG;
62 #endif
63
64 MALLOC_DEFINE(M_NTFSNTVATTR, "NTFS vattr", "NTFS file attribute information");
65 MALLOC_DEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
66 MALLOC_DEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
67 MALLOC_DEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
68
69 /* Local struct used in ntfs_ntlookupfile() */
70 struct ntfs_lookup_ctx {
71 u_int32_t aoff;
72 u_int32_t rdsize;
73 cn_t cn;
74 struct ntfs_lookup_ctx *prev;
75 };
76
77 static int ntfs_ntlookupattr __P((struct ntfsmount *, const char *, int, int *, char **));
78 static int ntfs_findvattr __P((struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t));
79 static int ntfs_uastricmp __P((struct ntfsmount *, const wchar *, size_t, const char *, size_t));
80 static int ntfs_uastrcmp __P((struct ntfsmount *, const wchar *, size_t, const char *, size_t));
81
82 /* table for mapping Unicode chars into uppercase; it's filled upon first
83 * ntfs mount, freed upon last ntfs umount */
84 static wchar *ntfs_toupper_tab;
85 #define NTFS_U28(ch) ((((ch) & 0xE0) == 0) ? '_' : (ch) & 0xFF)
86 #define NTFS_TOUPPER(ch) (ntfs_toupper_tab[(unsigned char)(ch)])
87 static struct lock ntfs_toupper_lock;
88 static signed int ntfs_toupper_usecount;
89
90 /* support macro for ntfs_ntvattrget() */
91 #define NTFS_AALPCMP(aalp,type,name,namelen) ( \
92 (aalp->al_type == type) && (aalp->al_namelen == namelen) && \
93 !ntfs_uastrcmp(ntmp, aalp->al_name,aalp->al_namelen,name,namelen) )
94
95 /*
96 *
97 */
98 int
99 ntfs_ntvattrrele(vap)
100 struct ntvattr * vap;
101 {
102 dprintf(("ntfs_ntvattrrele: ino: %d, type: 0x%x\n",
103 vap->va_ip->i_number, vap->va_type));
104
105 ntfs_ntrele(vap->va_ip);
106
107 return (0);
108 }
109
110 /*
111 * find the attribute in the ntnode
112 */
113 static int
114 ntfs_findvattr(ntmp, ip, lvapp, vapp, type, name, namelen, vcn)
115 struct ntfsmount *ntmp;
116 struct ntnode *ip;
117 struct ntvattr **lvapp, **vapp;
118 u_int32_t type;
119 const char *name;
120 size_t namelen;
121 cn_t vcn;
122 {
123 int error;
124 struct ntvattr *vap;
125
126 if((ip->i_flag & IN_LOADED) == 0) {
127 dprintf(("ntfs_findvattr: node not loaded, ino: %d\n",
128 ip->i_number));
129 error = ntfs_loadntnode(ntmp,ip);
130 if (error) {
131 printf("ntfs_findvattr: FAILED TO LOAD INO: %d\n",
132 ip->i_number);
133 return (error);
134 }
135 }
136
137 *lvapp = NULL;
138 *vapp = NULL;
139 for (vap = ip->i_valist.lh_first; vap; vap = vap->va_list.le_next) {
140 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %d - %d\n", \
141 vap->va_type, (u_int32_t) vap->va_vcnstart, \
142 (u_int32_t) vap->va_vcnend));
143 if ((vap->va_type == type) &&
144 (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
145 (vap->va_namelen == namelen) &&
146 (strncmp(name, vap->va_name, namelen) == 0)) {
147 *vapp = vap;
148 ntfs_ntref(vap->va_ip);
149 return (0);
150 }
151 if (vap->va_type == NTFS_A_ATTRLIST)
152 *lvapp = vap;
153 }
154
155 return (-1);
156 }
157
158 /*
159 * Search attribute specified in ntnode (load ntnode if necessary).
160 * If not found but ATTR_A_ATTRLIST present, read it in and search through.
161 * VOP_VGET node needed, and lookup through its ntnode (load if nessesary).
162 *
163 * ntnode should be locked
164 */
165 int
166 ntfs_ntvattrget(
167 struct ntfsmount * ntmp,
168 struct ntnode * ip,
169 u_int32_t type,
170 const char *name,
171 cn_t vcn,
172 struct ntvattr ** vapp)
173 {
174 struct ntvattr *lvap = NULL;
175 struct attr_attrlist *aalp;
176 struct attr_attrlist *nextaalp;
177 struct vnode *newvp;
178 struct ntnode *newip;
179 caddr_t alpool;
180 size_t namelen, len;
181 int error;
182
183 *vapp = NULL;
184
185 if (name) {
186 dprintf(("ntfs_ntvattrget: " \
187 "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
188 ip->i_number, type, name, (u_int32_t) vcn));
189 namelen = strlen(name);
190 } else {
191 dprintf(("ntfs_ntvattrget: " \
192 "ino: %d, type: 0x%x, vcn: %d\n", \
193 ip->i_number, type, (u_int32_t) vcn));
194 name = "";
195 namelen = 0;
196 }
197
198 error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
199 if (error >= 0)
200 return (error);
201
202 if (!lvap) {
203 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
204 "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
205 ip->i_number, type, name, (u_int32_t) vcn));
206 return (ENOENT);
207 }
208 /* Scan $ATTRIBUTE_LIST for requested attribute */
209 len = lvap->va_datalen;
210 alpool = (caddr_t) malloc(len, M_TEMP, M_WAITOK);
211 error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
212 NULL);
213 if (error)
214 goto out;
215
216 aalp = (struct attr_attrlist *) alpool;
217 nextaalp = NULL;
218
219 for(; len > 0; aalp = nextaalp) {
220 dprintf(("ntfs_ntvattrget: " \
221 "attrlist: ino: %d, attr: 0x%x, vcn: %d\n", \
222 aalp->al_inumber, aalp->al_type, \
223 (u_int32_t) aalp->al_vcnstart));
224
225 if (len > aalp->reclen) {
226 nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
227 } else {
228 nextaalp = NULL;
229 }
230 len -= aalp->reclen;
231
232 if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
233 (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
234 NTFS_AALPCMP(nextaalp, type, name, namelen)))
235 continue;
236
237 dprintf(("ntfs_ntvattrget: attribute in ino: %d\n",
238 aalp->al_inumber));
239
240 /* this is not a main record, so we can't use just plain
241 vget() */
242 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
243 NTFS_A_DATA, NULL, LK_EXCLUSIVE,
244 VG_EXT, curproc, &newvp);
245 if (error) {
246 printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
247 aalp->al_inumber);
248 goto out;
249 }
250 newip = VTONT(newvp);
251 /* XXX have to lock ntnode */
252 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
253 type, name, namelen, vcn);
254 vput(newvp);
255 if (error == 0)
256 goto out;
257 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
258 break;
259 }
260 error = ENOENT;
261
262 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
263 "ino: %d, type: 0x%x, name: %.*s, vcn: %d\n", \
264 ip->i_number, type, (int) namelen, name, (u_int32_t) vcn));
265 out:
266 free(alpool, M_TEMP);
267 return (error);
268 }
269
270 /*
271 * Read ntnode from disk, make ntvattr list.
272 *
273 * ntnode should be locked
274 */
275 int
276 ntfs_loadntnode(
277 struct ntfsmount * ntmp,
278 struct ntnode * ip)
279 {
280 struct filerec *mfrp;
281 daddr_t bn;
282 int error,off;
283 struct attr *ap;
284 struct ntvattr *nvap;
285
286 dprintf(("ntfs_loadntnode: loading ino: %d\n",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, &bp);
302 if (error) {
303 printf("ntfs_loadntnode: BREAD FAILED\n");
304 brelse(bp);
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, (caddr_t)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: %d\n",ip->i_number));
332 off = mfrp->fr_attroff;
333 ap = (struct attr *) ((caddr_t)mfrp + off);
334
335 LIST_INIT(&ip->i_valist);
336
337 while (ap->a_hdr.a_type != -1) {
338 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
339 if (error)
340 break;
341 nvap->va_ip = ip;
342
343 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
344
345 off += ap->a_hdr.reclen;
346 ap = (struct attr *) ((caddr_t)mfrp + off);
347 }
348 if (error) {
349 printf("ntfs_loadntnode: failed to load attr ino: %d\n",
350 ip->i_number);
351 goto out;
352 }
353
354 ip->i_mainrec = mfrp->fr_mainrec;
355 ip->i_nlink = mfrp->fr_nlink;
356 ip->i_frflag = mfrp->fr_flags;
357
358 ip->i_flag |= IN_LOADED;
359
360 out:
361 free(mfrp, M_TEMP);
362 return (error);
363 }
364
365 /*
366 * Routine locks ntnode and increase usecount, just opposite of
367 * ntfs_ntput().
368 */
369 int
370 ntfs_ntget(ip)
371 struct ntnode *ip;
372 {
373 dprintf(("ntfs_ntget: get ntnode %d: %p, usecount: %d\n",
374 ip->i_number, ip, ip->i_usecount));
375
376 simple_lock(&ip->i_interlock);
377 ip->i_usecount++;
378 lockmgr(&ip->i_lock, LK_EXCLUSIVE | LK_INTERLOCK, &ip->i_interlock);
379
380 return 0;
381 }
382
383 /*
384 * Routine search ntnode in hash, if found: lock, inc usecount and return.
385 * If not in hash allocate structure for ntnode, prefill it, lock,
386 * inc count and return.
387 *
388 * ntnode returned locked
389 */
390 int
391 ntfs_ntlookup(
392 struct ntfsmount * ntmp,
393 ino_t ino,
394 struct ntnode ** ipp)
395 {
396 struct ntnode *ip;
397
398 dprintf(("ntfs_ntlookup: looking for ntnode %d\n", ino));
399
400 do {
401 if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
402 ntfs_ntget(ip);
403 dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
404 ino, ip, ip->i_usecount));
405 *ipp = ip;
406 return (0);
407 }
408 } while (lockmgr(&ntfs_hashlock, LK_EXCLUSIVE | LK_SLEEPFAIL, NULL));
409
410 MALLOC(ip, struct ntnode *, sizeof(struct ntnode),
411 M_NTFSNTNODE, M_WAITOK);
412 ddprintf(("ntfs_ntlookup: allocating ntnode: %d: %p\n", ino, ip));
413 bzero(ip, sizeof(struct ntnode));
414
415 /* Generic initialization */
416 ip->i_devvp = ntmp->ntm_devvp;
417 ip->i_dev = ntmp->ntm_dev;
418 ip->i_number = ino;
419 ip->i_mp = ntmp;
420
421 LIST_INIT(&ip->i_fnlist);
422
423 /* init lock and lock the newborn ntnode */
424 lockinit(&ip->i_lock, PINOD, "ntnode", 0, LK_EXCLUSIVE);
425 simple_lock_init(&ip->i_interlock);
426 ntfs_ntget(ip);
427
428 ntfs_nthashins(ip);
429
430 lockmgr(&ntfs_hashlock, LK_RELEASE, NULL);
431
432 *ipp = ip;
433
434 dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
435 ino, ip, ip->i_usecount));
436
437 return (0);
438 }
439
440 /*
441 * Decrement usecount of ntnode and unlock it, if usecount reach zero,
442 * deallocate ntnode.
443 *
444 * ntnode should be locked on entry, and unlocked on return.
445 */
446 void
447 ntfs_ntput(ip)
448 struct ntnode *ip;
449 {
450 struct ntvattr *vap;
451
452 dprintf(("ntfs_ntput: rele ntnode %d: %p, usecount: %d\n",
453 ip->i_number, ip, ip->i_usecount));
454
455 simple_lock(&ip->i_interlock);
456 ip->i_usecount--;
457
458 #ifdef DIAGNOSTIC
459 if (ip->i_usecount < 0) {
460 panic("ntfs_ntput: ino: %d usecount: %d ",
461 ip->i_number,ip->i_usecount);
462 }
463 #endif
464
465 lockmgr(&ip->i_lock, LK_RELEASE|LK_INTERLOCK, &ip->i_interlock);
466
467 if (ip->i_usecount == 0) {
468 dprintf(("ntfs_ntput: deallocating ntnode: %d\n",
469 ip->i_number));
470
471 if (ip->i_fnlist.lh_first)
472 panic("ntfs_ntput: ntnode has fnodes");
473
474 ntfs_nthashrem(ip);
475
476 while (ip->i_valist.lh_first != NULL) {
477 vap = ip->i_valist.lh_first;
478 LIST_REMOVE(vap,va_list);
479 ntfs_freentvattr(vap);
480 }
481 FREE(ip, M_NTFSNTNODE);
482 }
483 }
484
485 /*
486 * increment usecount of ntnode
487 */
488 void
489 ntfs_ntref(ip)
490 struct ntnode *ip;
491 {
492 simple_lock(&ip->i_interlock);
493 ip->i_usecount++;
494 simple_unlock(&ip->i_interlock);
495
496 dprintf(("ntfs_ntref: ino %d, usecount: %d\n",
497 ip->i_number, ip->i_usecount));
498
499 }
500
501 /*
502 * Decrement usecount of ntnode.
503 */
504 void
505 ntfs_ntrele(ip)
506 struct ntnode *ip;
507 {
508 dprintf(("ntfs_ntrele: rele ntnode %d: %p, usecount: %d\n",
509 ip->i_number, ip, ip->i_usecount));
510
511 simple_lock(&ip->i_interlock);
512 ip->i_usecount--;
513
514 if (ip->i_usecount < 0)
515 panic("ntfs_ntrele: ino: %d usecount: %d ",
516 ip->i_number,ip->i_usecount);
517 simple_unlock(&ip->i_interlock);
518 }
519
520 /*
521 * Deallocate all memory allocated for ntvattr
522 */
523 void
524 ntfs_freentvattr(vap)
525 struct ntvattr * vap;
526 {
527 if (vap->va_flag & NTFS_AF_INRUN) {
528 if (vap->va_vruncn)
529 free(vap->va_vruncn, M_NTFSRUN);
530 if (vap->va_vruncl)
531 free(vap->va_vruncl, M_NTFSRUN);
532 } else {
533 if (vap->va_datap)
534 free(vap->va_datap, M_NTFSRDATA);
535 }
536 FREE(vap, M_NTFSNTVATTR);
537 }
538
539 /*
540 * Convert disk image of attribute into ntvattr structure,
541 * runs are expanded also.
542 */
543 int
544 ntfs_attrtontvattr(
545 struct ntfsmount * ntmp,
546 struct ntvattr ** rvapp,
547 struct attr * rap)
548 {
549 int error, i;
550 struct ntvattr *vap;
551
552 error = 0;
553 *rvapp = NULL;
554
555 MALLOC(vap, struct ntvattr *, sizeof(struct ntvattr),
556 M_NTFSNTVATTR, M_WAITOK);
557 bzero(vap, sizeof(struct ntvattr));
558 vap->va_ip = NULL;
559 vap->va_flag = rap->a_hdr.a_flag;
560 vap->va_type = rap->a_hdr.a_type;
561 vap->va_compression = rap->a_hdr.a_compression;
562 vap->va_index = rap->a_hdr.a_index;
563
564 ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
565
566 vap->va_namelen = rap->a_hdr.a_namelen;
567 if (rap->a_hdr.a_namelen) {
568 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
569 ddprintf((", name:["));
570 for (i = 0; i < vap->va_namelen; i++) {
571 vap->va_name[i] = unp[i];
572 ddprintf(("%c", vap->va_name[i]));
573 }
574 ddprintf(("]"));
575 }
576 if (vap->va_flag & NTFS_AF_INRUN) {
577 ddprintf((", nonres."));
578 vap->va_datalen = rap->a_nr.a_datalen;
579 vap->va_allocated = rap->a_nr.a_allocated;
580 vap->va_vcnstart = rap->a_nr.a_vcnstart;
581 vap->va_vcnend = rap->a_nr.a_vcnend;
582 vap->va_compressalg = rap->a_nr.a_compressalg;
583 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
584 &(vap->va_vruncnt),
585 (caddr_t) rap + rap->a_nr.a_dataoff);
586 } else {
587 vap->va_compressalg = 0;
588 ddprintf((", res."));
589 vap->va_datalen = rap->a_r.a_datalen;
590 vap->va_allocated = rap->a_r.a_datalen;
591 vap->va_vcnstart = 0;
592 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
593 vap->va_datap = (caddr_t) malloc(vap->va_datalen,
594 M_NTFSRDATA, M_WAITOK);
595 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
596 rap->a_r.a_datalen);
597 }
598 ddprintf((", len: %d", vap->va_datalen));
599
600 if (error)
601 FREE(vap, M_NTFSNTVATTR);
602 else
603 *rvapp = vap;
604
605 ddprintf(("\n"));
606
607 return (error);
608 }
609
610 /*
611 * Expand run into more utilizable and more memory eating format.
612 */
613 int
614 ntfs_runtovrun(
615 cn_t ** rcnp,
616 cn_t ** rclp,
617 u_long * rcntp,
618 u_int8_t * run)
619 {
620 u_int32_t off;
621 u_int32_t sz, i;
622 cn_t *cn;
623 cn_t *cl;
624 u_long cnt;
625 cn_t prev;
626 cn_t tmp;
627
628 off = 0;
629 cnt = 0;
630 i = 0;
631 while (run[off]) {
632 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
633 cnt++;
634 }
635 cn = (cn_t *) malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
636 cl = (cn_t *) malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
637
638 off = 0;
639 cnt = 0;
640 prev = 0;
641 while (run[off]) {
642
643 sz = run[off++];
644 cl[cnt] = 0;
645
646 for (i = 0; i < (sz & 0xF); i++)
647 cl[cnt] += (u_int32_t) run[off++] << (i << 3);
648
649 sz >>= 4;
650 if (run[off + sz - 1] & 0x80) {
651 tmp = ((u_int64_t) - 1) << (sz << 3);
652 for (i = 0; i < sz; i++)
653 tmp |= (u_int64_t) run[off++] << (i << 3);
654 } else {
655 tmp = 0;
656 for (i = 0; i < sz; i++)
657 tmp |= (u_int64_t) run[off++] << (i << 3);
658 }
659 if (tmp)
660 prev = cn[cnt] = prev + tmp;
661 else
662 cn[cnt] = tmp;
663
664 cnt++;
665 }
666 *rcnp = cn;
667 *rclp = cl;
668 *rcntp = cnt;
669 return (0);
670 }
671
672 /*
673 * Compare unicode and ascii string case insens.
674 */
675 static int
676 ntfs_uastricmp(ntmp, ustr, ustrlen, astr, astrlen)
677 struct ntfsmount *ntmp;
678 const wchar *ustr;
679 size_t ustrlen;
680 const char *astr;
681 size_t astrlen;
682 {
683 size_t i;
684 int res;
685
686 for (i = 0; i < ustrlen && astrlen > 0; i++) {
687 res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i]),
688 NTFS_TOUPPER((*ntmp->ntm_wget)(&astr, &astrlen)) );
689 if (res)
690 return res;
691 }
692
693 if (i == ustrlen && astrlen == 0)
694 return 0;
695 else if (i == ustrlen)
696 return -1;
697 else
698 return 1;
699 }
700
701 /*
702 * Compare unicode and ascii string case sens.
703 */
704 static int
705 ntfs_uastrcmp(ntmp, ustr, ustrlen, astr, astrlen)
706 struct ntfsmount *ntmp;
707 const wchar *ustr;
708 size_t ustrlen;
709 const char *astr;
710 size_t astrlen;
711 {
712 size_t i;
713 int res;
714
715 for (i = 0; (i < ustrlen) && astrlen > 0; i++) {
716 res = (*ntmp->ntm_wcmp)(ustr[i],
717 (*ntmp->ntm_wget)(&astr, &astrlen));
718 if (res)
719 return res;
720 }
721
722 if (i == ustrlen && astrlen == 0)
723 return 0;
724 else if (i == ustrlen)
725 return -1;
726 else
727 return 1;
728 }
729
730 /*
731 * Search fnode in ntnode, if not found allocate and preinitialize.
732 *
733 * ntnode should be locked on entry.
734 */
735 int
736 ntfs_fget(
737 struct ntfsmount *ntmp,
738 struct ntnode *ip,
739 int attrtype,
740 char *attrname,
741 struct fnode **fpp)
742 {
743 struct fnode *fp;
744
745 dprintf(("ntfs_fget: ino: %d, attrtype: 0x%x, attrname: %s\n",
746 ip->i_number,attrtype, attrname?attrname:""));
747 *fpp = NULL;
748 for (fp = ip->i_fnlist.lh_first; fp != NULL; fp = fp->f_fnlist.le_next){
749 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
750 fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
751
752 if ((attrtype == fp->f_attrtype) &&
753 ((!attrname && !fp->f_attrname) ||
754 (attrname && fp->f_attrname &&
755 !strcmp(attrname,fp->f_attrname)))){
756 dprintf(("ntfs_fget: found existed: %p\n",fp));
757 *fpp = fp;
758 }
759 }
760
761 if (*fpp)
762 return (0);
763
764 MALLOC(fp, struct fnode *, sizeof(struct fnode), M_NTFSFNODE, M_WAITOK);
765 bzero(fp, sizeof(struct fnode));
766 dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
767
768 fp->f_ip = ip;
769 fp->f_attrname = attrname;
770 if (fp->f_attrname) fp->f_flag |= FN_AATTRNAME;
771 fp->f_attrtype = attrtype;
772
773 ntfs_ntref(ip);
774
775 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
776
777 *fpp = fp;
778
779 return (0);
780 }
781
782 /*
783 * Deallocate fnode, remove it from ntnode's fnode list.
784 *
785 * ntnode should be locked.
786 */
787 void
788 ntfs_frele(
789 struct fnode *fp)
790 {
791 struct ntnode *ip = FTONT(fp);
792
793 dprintf(("ntfs_frele: fnode: %p for %d: %p\n", fp, ip->i_number, ip));
794
795 dprintf(("ntfs_frele: deallocating fnode\n"));
796 LIST_REMOVE(fp,f_fnlist);
797 if (fp->f_flag & FN_AATTRNAME)
798 FREE(fp->f_attrname, M_TEMP);
799 if (fp->f_dirblbuf)
800 FREE(fp->f_dirblbuf, M_NTFSDIR);
801 FREE(fp, M_NTFSFNODE);
802 ntfs_ntrele(ip);
803 }
804
805 /*
806 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME],
807 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
808 * If $ATTR_TYPE not specified, ATTR_A_DATA assumed.
809 */
810 static int
811 ntfs_ntlookupattr(
812 struct ntfsmount * ntmp,
813 const char * name,
814 int namelen,
815 int *attrtype,
816 char **attrname)
817 {
818 const char *sys;
819 size_t syslen, i;
820 struct ntvattrdef *adp;
821
822 if (namelen == 0)
823 return (0);
824
825 if (name[0] == '$') {
826 sys = name;
827 for (syslen = 0; syslen < namelen; syslen++) {
828 if(sys[syslen] == ':') {
829 name++;
830 namelen--;
831 break;
832 }
833 }
834 name += syslen;
835 namelen -= syslen;
836
837 adp = ntmp->ntm_ad;
838 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
839 if (syslen != adp->ad_namelen ||
840 strncmp(sys, adp->ad_name, syslen) != 0)
841 continue;
842
843 *attrtype = adp->ad_type;
844 goto out;
845 }
846 return (ENOENT);
847 }
848
849 out:
850 if (namelen) {
851 *attrname = (char *) malloc(namelen, M_TEMP, M_WAITOK);
852 memcpy((*attrname), name, namelen);
853 (*attrname)[namelen] = '\0';
854 *attrtype = NTFS_A_DATA;
855 }
856
857 return (0);
858 }
859
860 /*
861 * Lookup specified node for filename, matching cnp,
862 * return fnode filled.
863 */
864 int
865 ntfs_ntlookupfile(
866 struct ntfsmount * ntmp,
867 struct vnode * vp,
868 struct componentname * cnp,
869 struct vnode ** vpp)
870 {
871 struct fnode *fp = VTOF(vp);
872 struct ntnode *ip = FTONT(fp);
873 struct ntvattr *vap; /* Root attribute */
874 cn_t cn = 0; /* VCN in current attribute */
875 caddr_t rdbuf; /* Buffer to read directory's blocks */
876 u_int32_t blsize;
877 u_int32_t rdsize; /* Length of data to read from current block */
878 struct attr_indexentry *iep;
879 int error, res, anamelen, fnamelen;
880 const char *fname,*aname;
881 u_int32_t aoff;
882 int attrtype = NTFS_A_DATA;
883 char *attrname = NULL;
884 struct fnode *nfp;
885 struct vnode *nvp;
886 enum vtype f_type;
887 int fullscan = 0;
888 struct ntfs_lookup_ctx *lookup_ctx = NULL, *tctx;
889
890 error = ntfs_ntget(ip);
891 if (error)
892 return (error);
893
894 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
895 if (error || (vap->va_flag & NTFS_AF_INRUN))
896 return (ENOTDIR);
897
898 /*
899 * Divide file name into: foofilefoofilefoofile[:attrspec]
900 * Store like this: fname:fnamelen [aname:anamelen]
901 */
902 fname = cnp->cn_nameptr;
903 aname = NULL;
904 anamelen = 0;
905 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
906 if(fname[fnamelen] == ':') {
907 aname = fname + fnamelen + 1;
908 anamelen = cnp->cn_namelen - fnamelen - 1;
909 dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
910 fname, fnamelen, aname, anamelen));
911 break;
912 }
913
914 blsize = vap->va_a_iroot->ir_size;
915 dprintf(("ntfs_ntlookupfile: blksz: %d\n", blsize));
916
917 rdbuf = (caddr_t) malloc(blsize, M_TEMP, M_WAITOK);
918
919 loop:
920 rdsize = vap->va_datalen;
921 dprintf(("ntfs_ntlookupfile: rdsz: %d\n", rdsize));
922
923 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
924 0, rdsize, rdbuf, NULL);
925 if (error)
926 goto fail;
927
928 aoff = sizeof(struct attr_indexroot);
929
930 do {
931 iep = (struct attr_indexentry *) (rdbuf + aoff);
932
933 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
934 aoff += iep->reclen,
935 iep = (struct attr_indexentry *) (rdbuf + aoff))
936 {
937 ddprintf(("scan: %d, %d\n",
938 (u_int32_t) iep->ie_number,
939 (u_int32_t) iep->ie_fnametype));
940
941 /* check the name - the case-insensitive check
942 * has to come first, to break from this for loop
943 * if needed, so we can dive correctly */
944 res = ntfs_uastricmp(ntmp, iep->ie_fname,
945 iep->ie_fnamelen, fname, fnamelen);
946 if (!fullscan) {
947 if (res > 0) break;
948 if (res < 0) continue;
949 }
950
951 if (iep->ie_fnametype == 0 ||
952 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
953 {
954 res = ntfs_uastrcmp(ntmp, iep->ie_fname,
955 iep->ie_fnamelen, fname, fnamelen);
956 if (res != 0 && !fullscan) continue;
957 }
958
959 /* if we perform full scan, the file does not match
960 * and this is subnode, dive */
961 if (fullscan && res != 0) {
962 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
963 MALLOC(tctx, struct ntfs_lookup_ctx *,
964 sizeof(struct ntfs_lookup_ctx),
965 M_TEMP, M_WAITOK);
966 tctx->aoff = aoff + iep->reclen;
967 tctx->rdsize = rdsize;
968 tctx->cn = cn;
969 tctx->prev = lookup_ctx;
970 lookup_ctx = tctx;
971 break;
972 } else
973 continue;
974 }
975
976 if (aname) {
977 error = ntfs_ntlookupattr(ntmp,
978 aname, anamelen,
979 &attrtype, &attrname);
980 if (error)
981 goto fail;
982 }
983
984 /* Check if we've found ourselves */
985 if ((iep->ie_number == ip->i_number) &&
986 (attrtype == fp->f_attrtype) &&
987 ((!attrname && !fp->f_attrname) ||
988 (attrname && fp->f_attrname &&
989 !strcmp(attrname, fp->f_attrname))))
990 {
991 VREF(vp);
992 *vpp = vp;
993 error = 0;
994 goto fail;
995 }
996
997 /* free the buffer returned by ntfs_ntlookupattr() */
998 if (attrname) {
999 FREE(attrname, M_TEMP);
1000 attrname = NULL;
1001 }
1002
1003 /* vget node, but don't load it */
1004 error = ntfs_vgetex(ntmp->ntm_mountp,
1005 iep->ie_number, attrtype, attrname,
1006 LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
1007 curproc, &nvp);
1008 if (error)
1009 goto fail;
1010
1011 nfp = VTOF(nvp);
1012
1013 if (nfp->f_flag & FN_VALID) {
1014 *vpp = nvp;
1015 goto fail;
1016 }
1017
1018 nfp->f_fflag = iep->ie_fflag;
1019 nfp->f_pnumber = iep->ie_fpnumber;
1020 nfp->f_times = iep->ie_ftimes;
1021
1022 if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
1023 (nfp->f_attrtype == NTFS_A_DATA) &&
1024 (nfp->f_attrname == NULL))
1025 f_type = VDIR;
1026 else
1027 f_type = VREG;
1028
1029 nvp->v_type = f_type;
1030
1031 if ((nfp->f_attrtype == NTFS_A_DATA) &&
1032 (nfp->f_attrname == NULL))
1033 {
1034 /* Opening default attribute */
1035 nfp->f_size = iep->ie_fsize;
1036 nfp->f_allocated = iep->ie_fallocated;
1037 nfp->f_flag |= FN_PRELOADED;
1038 } else {
1039 error = ntfs_filesize(ntmp, nfp,
1040 &nfp->f_size, &nfp->f_allocated);
1041 if (error) {
1042 vput(nvp);
1043 goto fail;
1044 }
1045 }
1046
1047 nfp->f_flag &= ~FN_VALID;
1048 *vpp = nvp;
1049 goto fail;
1050 }
1051
1052 /* Dive if possible */
1053 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
1054 dprintf(("ntfs_ntlookupfile: diving\n"));
1055
1056 cn = *(cn_t *) (rdbuf + aoff +
1057 iep->reclen - sizeof(cn_t));
1058 rdsize = blsize;
1059
1060 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
1061 ntfs_cntob(cn), rdsize, rdbuf, NULL);
1062 if (error)
1063 goto fail;
1064
1065 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1066 rdbuf, rdsize);
1067 if (error)
1068 goto fail;
1069
1070 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
1071 0x18);
1072 } else if (fullscan && lookup_ctx) {
1073 cn = lookup_ctx->cn;
1074 aoff = lookup_ctx->aoff;
1075 rdsize = lookup_ctx->rdsize;
1076
1077 error = ntfs_readattr(ntmp, ip,
1078 (cn == 0) ? NTFS_A_INDXROOT : NTFS_A_INDX,
1079 "$I30", ntfs_cntob(cn), rdsize, rdbuf, NULL);
1080 if (error)
1081 goto fail;
1082
1083 if (cn != 0) {
1084 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1085 rdbuf, rdsize);
1086 if (error)
1087 goto fail;
1088 }
1089
1090 tctx = lookup_ctx;
1091 lookup_ctx = lookup_ctx->prev;
1092 FREE(tctx, M_TEMP);
1093 } else {
1094 dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
1095 error = ENOENT;
1096 break;
1097 }
1098 } while (1);
1099
1100 /* perform full scan if no entry was found */
1101 if (!fullscan && error == ENOENT) {
1102 fullscan = 1;
1103 cn = 0; /* need zero, used by lookup_ctx */
1104
1105 ddprintf(("ntfs_ntlookupfile: fullscan performed for: %.*s\n",
1106 (int) fnamelen, fname));
1107 goto loop;
1108 }
1109
1110 dprintf(("finish\n"));
1111
1112 fail:
1113 if (attrname)
1114 FREE(attrname, M_TEMP);
1115 if (lookup_ctx) {
1116 while(lookup_ctx) {
1117 tctx = lookup_ctx;
1118 lookup_ctx = lookup_ctx->prev;
1119 FREE(tctx, M_TEMP);
1120 }
1121 }
1122 ntfs_ntvattrrele(vap);
1123 ntfs_ntput(ip);
1124 free(rdbuf, M_TEMP);
1125 return (error);
1126 }
1127
1128 /*
1129 * Check if name type is permitted to show.
1130 */
1131 int
1132 ntfs_isnamepermitted(
1133 struct ntfsmount * ntmp,
1134 struct attr_indexentry * iep)
1135 {
1136 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
1137 return 1;
1138
1139 switch (iep->ie_fnametype) {
1140 case 2:
1141 ddprintf(("ntfs_isnamepermitted: skipped DOS name\n"));
1142 return 0;
1143 case 0: case 1: case 3:
1144 return 1;
1145 default:
1146 printf("ntfs_isnamepermitted: " \
1147 "WARNING! Unknown file name type: %d\n",
1148 iep->ie_fnametype);
1149 break;
1150 }
1151 return 0;
1152 }
1153
1154 /*
1155 * Read ntfs dir like stream of attr_indexentry, not like btree of them.
1156 * This is done by scanning $BITMAP:$I30 for busy clusters and reading them.
1157 * Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in
1158 * fnode, so we can skip toward record number num almost immediately.
1159 * Anyway this is rather slow routine. The problem is that we don't know
1160 * how many records are there in $INDEX_ALLOCATION:$I30 block.
1161 */
1162 int
1163 ntfs_ntreaddir(
1164 struct ntfsmount * ntmp,
1165 struct fnode * fp,
1166 u_int32_t num,
1167 struct attr_indexentry ** riepp)
1168 {
1169 struct ntnode *ip = FTONT(fp);
1170 struct ntvattr *vap = NULL; /* IndexRoot attribute */
1171 struct ntvattr *bmvap = NULL; /* BitMap attribute */
1172 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */
1173 caddr_t rdbuf; /* Buffer to read directory's blocks */
1174 u_char *bmp = NULL; /* Bitmap */
1175 u_int32_t blsize; /* Index allocation size (2048) */
1176 u_int32_t rdsize; /* Length of data to read */
1177 u_int32_t attrnum; /* Current attribute type */
1178 u_int32_t cpbl = 1; /* Clusters per directory block */
1179 u_int32_t blnum;
1180 struct attr_indexentry *iep;
1181 int error = ENOENT;
1182 u_int32_t aoff, cnum;
1183
1184 dprintf(("ntfs_ntreaddir: read ino: %d, num: %d\n", ip->i_number, num));
1185 error = ntfs_ntget(ip);
1186 if (error)
1187 return (error);
1188
1189 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
1190 if (error)
1191 return (ENOTDIR);
1192
1193 if (fp->f_dirblbuf == NULL) {
1194 fp->f_dirblsz = vap->va_a_iroot->ir_size;
1195 fp->f_dirblbuf = (caddr_t) malloc(
1196 MAX(vap->va_datalen,fp->f_dirblsz), M_NTFSDIR, M_WAITOK);
1197 }
1198
1199 blsize = fp->f_dirblsz;
1200 rdbuf = fp->f_dirblbuf;
1201
1202 dprintf(("ntfs_ntreaddir: rdbuf: 0x%p, blsize: %d\n", rdbuf, blsize));
1203
1204 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
1205 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
1206 0, &bmvap);
1207 if (error) {
1208 error = ENOTDIR;
1209 goto fail;
1210 }
1211 bmp = (u_char *) malloc(bmvap->va_datalen, M_TEMP, M_WAITOK);
1212 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
1213 bmvap->va_datalen, bmp, NULL);
1214 if (error)
1215 goto fail;
1216
1217 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
1218 0, &iavap);
1219 if (error) {
1220 error = ENOTDIR;
1221 goto fail;
1222 }
1223 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
1224 dprintf(("ntfs_ntreaddir: indexalloc: %d, cpbl: %d\n",
1225 iavap->va_datalen, cpbl));
1226 } else {
1227 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
1228 iavap = bmvap = NULL;
1229 bmp = NULL;
1230 }
1231
1232 /* Try use previous values */
1233 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
1234 attrnum = fp->f_lastdattr;
1235 aoff = fp->f_lastdoff;
1236 blnum = fp->f_lastdblnum;
1237 cnum = fp->f_lastdnum;
1238 } else {
1239 attrnum = NTFS_A_INDXROOT;
1240 aoff = sizeof(struct attr_indexroot);
1241 blnum = 0;
1242 cnum = 0;
1243 }
1244
1245 do {
1246 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
1247 attrnum, (u_int32_t) blnum, cnum, num, aoff));
1248 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
1249 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
1250 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
1251 if (error)
1252 goto fail;
1253
1254 if (attrnum == NTFS_A_INDX) {
1255 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1256 rdbuf, rdsize);
1257 if (error)
1258 goto fail;
1259 }
1260 if (aoff == 0)
1261 aoff = (attrnum == NTFS_A_INDX) ?
1262 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
1263 sizeof(struct attr_indexroot);
1264
1265 iep = (struct attr_indexentry *) (rdbuf + aoff);
1266 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
1267 aoff += iep->reclen,
1268 iep = (struct attr_indexentry *) (rdbuf + aoff))
1269 {
1270 if (!ntfs_isnamepermitted(ntmp, iep)) continue;
1271
1272 if (cnum >= num) {
1273 fp->f_lastdnum = cnum;
1274 fp->f_lastdoff = aoff;
1275 fp->f_lastdblnum = blnum;
1276 fp->f_lastdattr = attrnum;
1277
1278 *riepp = iep;
1279
1280 error = 0;
1281 goto fail;
1282 }
1283 cnum++;
1284 }
1285
1286 if (iavap) {
1287 if (attrnum == NTFS_A_INDXROOT)
1288 blnum = 0;
1289 else
1290 blnum++;
1291
1292 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
1293 if (bmp[blnum >> 3] & (1 << (blnum & 3)))
1294 break;
1295 blnum++;
1296 }
1297
1298 attrnum = NTFS_A_INDX;
1299 aoff = 0;
1300 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
1301 break;
1302 dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
1303 }
1304 } while (iavap);
1305
1306 *riepp = NULL;
1307 fp->f_lastdnum = 0;
1308
1309 fail:
1310 if (vap)
1311 ntfs_ntvattrrele(vap);
1312 if (bmvap)
1313 ntfs_ntvattrrele(bmvap);
1314 if (iavap)
1315 ntfs_ntvattrrele(iavap);
1316 if (bmp)
1317 FREE(bmp, M_TEMP);
1318 ntfs_ntput(ip);
1319 return (error);
1320 }
1321
1322 /*
1323 * Convert NTFS times that are in 100 ns units and begins from
1324 * 1601 Jan 1 into unix times.
1325 */
1326 struct timespec
1327 ntfs_nttimetounix(
1328 u_int64_t nt)
1329 {
1330 struct timespec t;
1331
1332 /* WindowNT times are in 100 ns and from 1601 Jan 1 */
1333 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
1334 t.tv_sec = nt / (1000 * 1000 * 10) -
1335 369LL * 365LL * 24LL * 60LL * 60LL -
1336 89LL * 1LL * 24LL * 60LL * 60LL;
1337 return (t);
1338 }
1339
1340 /*
1341 * Get file times from NTFS_A_NAME attribute.
1342 */
1343 int
1344 ntfs_times(
1345 struct ntfsmount * ntmp,
1346 struct ntnode * ip,
1347 ntfs_times_t * tm)
1348 {
1349 struct ntvattr *vap;
1350 int error;
1351
1352 dprintf(("ntfs_times: ino: %d...\n", ip->i_number));
1353
1354 error = ntfs_ntget(ip);
1355 if (error)
1356 return (error);
1357
1358 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
1359 if (error) {
1360 ntfs_ntput(ip);
1361 return (error);
1362 }
1363 *tm = vap->va_a_name->n_times;
1364 ntfs_ntvattrrele(vap);
1365 ntfs_ntput(ip);
1366
1367 return (0);
1368 }
1369
1370 /*
1371 * Get file sizes from corresponding attribute.
1372 *
1373 * ntnode under fnode should be locked.
1374 */
1375 int
1376 ntfs_filesize(
1377 struct ntfsmount * ntmp,
1378 struct fnode * fp,
1379 u_int64_t * size,
1380 u_int64_t * bytes)
1381 {
1382 struct ntvattr *vap;
1383 struct ntnode *ip = FTONT(fp);
1384 u_int64_t sz, bn;
1385 int error;
1386
1387 dprintf(("ntfs_filesize: ino: %d\n", ip->i_number));
1388
1389 error = ntfs_ntvattrget(ntmp, ip,
1390 fp->f_attrtype, fp->f_attrname, 0, &vap);
1391 if (error)
1392 return (error);
1393
1394 bn = vap->va_allocated;
1395 sz = vap->va_datalen;
1396
1397 dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
1398 (u_int32_t) sz, (u_int32_t) bn));
1399
1400 if (size)
1401 *size = sz;
1402 if (bytes)
1403 *bytes = bn;
1404
1405 ntfs_ntvattrrele(vap);
1406
1407 return (0);
1408 }
1409
1410 /*
1411 * This is one of write routine.
1412 */
1413 int
1414 ntfs_writeattr_plain(
1415 struct ntfsmount * ntmp,
1416 struct ntnode * ip,
1417 u_int32_t attrnum,
1418 char *attrname,
1419 off_t roff,
1420 size_t rsize,
1421 void *rdata,
1422 size_t * initp,
1423 struct uio *uio)
1424 {
1425 size_t init;
1426 int error = 0;
1427 off_t off = roff, left = rsize, towrite;
1428 caddr_t data = rdata;
1429 struct ntvattr *vap;
1430 *initp = 0;
1431
1432 while (left) {
1433 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1434 ntfs_btocn(off), &vap);
1435 if (error)
1436 return (error);
1437 towrite = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1438 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
1439 (u_int32_t) off, (u_int32_t) towrite,
1440 (u_int32_t) vap->va_vcnstart,
1441 (u_int32_t) vap->va_vcnend));
1442 error = ntfs_writentvattr_plain(ntmp, ip, vap,
1443 off - ntfs_cntob(vap->va_vcnstart),
1444 towrite, data, &init, uio);
1445 if (error) {
1446 dprintf(("ntfs_writeattr_plain: " \
1447 "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
1448 (u_int32_t) off, (u_int32_t) towrite));
1449 dprintf(("ntfs_writeattr_plain: attrib: %d - %d\n",
1450 (u_int32_t) vap->va_vcnstart,
1451 (u_int32_t) vap->va_vcnend));
1452 ntfs_ntvattrrele(vap);
1453 break;
1454 }
1455 ntfs_ntvattrrele(vap);
1456 left -= towrite;
1457 off += towrite;
1458 data = data + towrite;
1459 *initp += init;
1460 }
1461
1462 return (error);
1463 }
1464
1465 /*
1466 * This is one of write routine.
1467 *
1468 * ntnode should be locked.
1469 */
1470 int
1471 ntfs_writentvattr_plain(
1472 struct ntfsmount * ntmp,
1473 struct ntnode * ip,
1474 struct ntvattr * vap,
1475 off_t roff,
1476 size_t rsize,
1477 void *rdata,
1478 size_t * initp,
1479 struct uio *uio)
1480 {
1481 int error = 0;
1482 int off;
1483 int cnt;
1484 cn_t ccn, ccl, cn, left, cl;
1485 caddr_t data = rdata;
1486 struct buf *bp;
1487 size_t tocopy;
1488
1489 *initp = 0;
1490
1491 if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
1492 dprintf(("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n"));
1493 return ENOTTY;
1494 }
1495
1496 ddprintf(("ntfs_writentvattr_plain: data in run: %lu chains\n",
1497 vap->va_vruncnt));
1498
1499 off = roff;
1500 left = rsize;
1501 ccl = 0;
1502 ccn = 0;
1503 cnt = 0;
1504 for (; left && (cnt < vap->va_vruncnt); cnt++) {
1505 ccn = vap->va_vruncn[cnt];
1506 ccl = vap->va_vruncl[cnt];
1507
1508 ddprintf(("ntfs_writentvattr_plain: " \
1509 "left %d, cn: 0x%x, cl: %d, off: %d\n", \
1510 (u_int32_t) left, (u_int32_t) ccn, \
1511 (u_int32_t) ccl, (u_int32_t) off));
1512
1513 if (ntfs_cntob(ccl) < off) {
1514 off -= ntfs_cntob(ccl);
1515 cnt++;
1516 continue;
1517 }
1518 if (!ccn && ip->i_number != NTFS_BOOTINO)
1519 continue; /* XXX */
1520
1521 ccl -= ntfs_btocn(off);
1522 cn = ccn + ntfs_btocn(off);
1523 off = ntfs_btocnoff(off);
1524
1525 while (left && ccl) {
1526 /*
1527 * Always read and write single clusters at a time -
1528 * we need to avoid requesting differently-sized
1529 * blocks at the same disk offsets to avoid
1530 * confusing the buffer cache.
1531 */
1532 tocopy = MIN(left, ntfs_cntob(1) - off);
1533 cl = ntfs_btocl(tocopy + off);
1534 KASSERT(cl == 1 && tocopy <= ntfs_cntob(1));
1535 ddprintf(("ntfs_writentvattr_plain: write: " \
1536 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
1537 (u_int32_t) cn, (u_int32_t) cl,
1538 (u_int32_t) off, (u_int32_t) tocopy,
1539 (u_int32_t) left));
1540 if ((off == 0) && (tocopy == ntfs_cntob(cl)))
1541 {
1542 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn),
1543 ntfs_cntob(cl), 0, 0);
1544 clrbuf(bp);
1545 } else {
1546 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
1547 ntfs_cntob(cl), NOCRED, &bp);
1548 if (error) {
1549 brelse(bp);
1550 return (error);
1551 }
1552 }
1553 if (uio)
1554 uiomove(bp->b_data + off, tocopy, uio);
1555 else
1556 memcpy(bp->b_data + off, data, tocopy);
1557 bawrite(bp);
1558 data = data + tocopy;
1559 *initp += tocopy;
1560 off = 0;
1561 left -= tocopy;
1562 cn += cl;
1563 ccl -= cl;
1564 }
1565 }
1566
1567 if (left) {
1568 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
1569 error = EINVAL;
1570 }
1571
1572 return (error);
1573 }
1574
1575 /*
1576 * This is one of read routines.
1577 *
1578 * ntnode should be locked.
1579 */
1580 int
1581 ntfs_readntvattr_plain(
1582 struct ntfsmount * ntmp,
1583 struct ntnode * ip,
1584 struct ntvattr * vap,
1585 off_t roff,
1586 size_t rsize,
1587 void *rdata,
1588 size_t * initp,
1589 struct uio *uio)
1590 {
1591 int error = 0;
1592 int off;
1593
1594 *initp = 0;
1595 if (vap->va_flag & NTFS_AF_INRUN) {
1596 int cnt;
1597 cn_t ccn, ccl, cn, left, cl;
1598 caddr_t data = rdata;
1599 struct buf *bp;
1600 size_t tocopy;
1601
1602 ddprintf(("ntfs_readntvattr_plain: data in run: %lu chains\n",
1603 vap->va_vruncnt));
1604
1605 off = roff;
1606 left = rsize;
1607 ccl = 0;
1608 ccn = 0;
1609 cnt = 0;
1610 while (left && (cnt < vap->va_vruncnt)) {
1611 ccn = vap->va_vruncn[cnt];
1612 ccl = vap->va_vruncl[cnt];
1613
1614 ddprintf(("ntfs_readntvattr_plain: " \
1615 "left %d, cn: 0x%x, cl: %d, off: %d\n", \
1616 (u_int32_t) left, (u_int32_t) ccn, \
1617 (u_int32_t) ccl, (u_int32_t) off));
1618
1619 if (ntfs_cntob(ccl) < off) {
1620 off -= ntfs_cntob(ccl);
1621 cnt++;
1622 continue;
1623 }
1624 if (ccn || ip->i_number == NTFS_BOOTINO) {
1625 ccl -= ntfs_btocn(off);
1626 cn = ccn + ntfs_btocn(off);
1627 off = ntfs_btocnoff(off);
1628
1629 while (left && ccl) {
1630 /*
1631 * Always read single clusters at a
1632 * time - we need to avoid reading
1633 * differently-sized blocks at the
1634 * same disk offsets to avoid
1635 * confusing the buffer cache.
1636 */
1637 tocopy = MIN(left,
1638 ntfs_cntob(1) - off);
1639 cl = ntfs_btocl(tocopy + off);
1640 KASSERT(cl == 1 &&
1641 tocopy <= ntfs_cntob(1));
1642
1643 ddprintf(("ntfs_readntvattr_plain: " \
1644 "read: cn: 0x%x cl: %d, " \
1645 "off: %d len: %d, left: %d\n",
1646 (u_int32_t) cn,
1647 (u_int32_t) cl,
1648 (u_int32_t) off,
1649 (u_int32_t) tocopy,
1650 (u_int32_t) left));
1651 error = bread(ntmp->ntm_devvp,
1652 ntfs_cntobn(cn),
1653 ntfs_cntob(cl),
1654 NOCRED, &bp);
1655 if (error) {
1656 brelse(bp);
1657 return (error);
1658 }
1659 if (uio) {
1660 uiomove(bp->b_data + off,
1661 tocopy, uio);
1662 } else {
1663 memcpy(data, bp->b_data + off,
1664 tocopy);
1665 }
1666 brelse(bp);
1667 data = data + tocopy;
1668 *initp += tocopy;
1669 off = 0;
1670 left -= tocopy;
1671 cn += cl;
1672 ccl -= cl;
1673 }
1674 } else {
1675 tocopy = MIN(left, ntfs_cntob(ccl) - off);
1676 ddprintf(("ntfs_readntvattr_plain: "
1677 "hole: ccn: 0x%x ccl: %d, off: %d, " \
1678 " len: %d, left: %d\n",
1679 (u_int32_t) ccn, (u_int32_t) ccl,
1680 (u_int32_t) off, (u_int32_t) tocopy,
1681 (u_int32_t) left));
1682 left -= tocopy;
1683 off = 0;
1684 if (uio) {
1685 size_t remains = tocopy;
1686 for(; remains; remains--)
1687 uiomove("", 1, uio);
1688 } else
1689 bzero(data, tocopy);
1690 data = data + tocopy;
1691 }
1692 cnt++;
1693 }
1694 if (left) {
1695 printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
1696 error = E2BIG;
1697 }
1698 } else {
1699 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
1700 if (uio)
1701 uiomove(vap->va_datap + roff, rsize, uio);
1702 else
1703 memcpy(rdata, vap->va_datap + roff, rsize);
1704 *initp += rsize;
1705 }
1706
1707 return (error);
1708 }
1709
1710 /*
1711 * This is one of read routines.
1712 */
1713 int
1714 ntfs_readattr_plain(
1715 struct ntfsmount * ntmp,
1716 struct ntnode * ip,
1717 u_int32_t attrnum,
1718 char *attrname,
1719 off_t roff,
1720 size_t rsize,
1721 void *rdata,
1722 size_t * initp,
1723 struct uio *uio)
1724 {
1725 size_t init;
1726 int error = 0;
1727 off_t off = roff, left = rsize, toread;
1728 caddr_t data = rdata;
1729 struct ntvattr *vap;
1730 *initp = 0;
1731
1732 while (left) {
1733 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1734 ntfs_btocn(off), &vap);
1735 if (error)
1736 return (error);
1737 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1738 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
1739 (u_int32_t) off, (u_int32_t) toread,
1740 (u_int32_t) vap->va_vcnstart,
1741 (u_int32_t) vap->va_vcnend));
1742 error = ntfs_readntvattr_plain(ntmp, ip, vap,
1743 off - ntfs_cntob(vap->va_vcnstart),
1744 toread, data, &init, uio);
1745 if (error) {
1746 printf("ntfs_readattr_plain: " \
1747 "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
1748 (u_int32_t) off, (u_int32_t) toread);
1749 printf("ntfs_readattr_plain: attrib: %d - %d\n",
1750 (u_int32_t) vap->va_vcnstart,
1751 (u_int32_t) vap->va_vcnend);
1752 ntfs_ntvattrrele(vap);
1753 break;
1754 }
1755 ntfs_ntvattrrele(vap);
1756 left -= toread;
1757 off += toread;
1758 data = data + toread;
1759 *initp += init;
1760 }
1761
1762 return (error);
1763 }
1764
1765 /*
1766 * This is one of read routines.
1767 */
1768 int
1769 ntfs_readattr(
1770 struct ntfsmount * ntmp,
1771 struct ntnode * ip,
1772 u_int32_t attrnum,
1773 char *attrname,
1774 off_t roff,
1775 size_t rsize,
1776 void *rdata,
1777 struct uio *uio)
1778 {
1779 int error = 0;
1780 struct ntvattr *vap;
1781 size_t init;
1782
1783 ddprintf(("ntfs_readattr: reading %d: 0x%x, from %d size %d bytes\n",
1784 ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
1785
1786 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
1787 if (error)
1788 return (error);
1789
1790 if ((roff > vap->va_datalen) ||
1791 (roff + rsize > vap->va_datalen)) {
1792 printf("ntfs_readattr: offset too big: %ld (%ld) > %ld\n",
1793 (long int) roff, (long int) roff + rsize,
1794 (long int) vap->va_datalen);
1795 ntfs_ntvattrrele(vap);
1796 return (E2BIG);
1797 }
1798 if (vap->va_compression && vap->va_compressalg) {
1799 u_int8_t *cup;
1800 u_int8_t *uup;
1801 off_t off = roff, left = rsize, tocopy;
1802 caddr_t data = rdata;
1803 cn_t cn;
1804
1805 ddprintf(("ntfs_ntreadattr: compression: %d\n",
1806 vap->va_compressalg));
1807
1808 MALLOC(cup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
1809 M_NTFSDECOMP, M_WAITOK);
1810 MALLOC(uup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
1811 M_NTFSDECOMP, M_WAITOK);
1812
1813 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
1814 off = roff - ntfs_cntob(cn);
1815
1816 while (left) {
1817 error = ntfs_readattr_plain(ntmp, ip, attrnum,
1818 attrname, ntfs_cntob(cn),
1819 ntfs_cntob(NTFS_COMPUNIT_CL),
1820 cup, &init, NULL);
1821 if (error)
1822 break;
1823
1824 tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
1825
1826 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
1827 if (uio)
1828 uiomove(cup + off, tocopy, uio);
1829 else
1830 memcpy(data, cup + off, tocopy);
1831 } else if (init == 0) {
1832 if (uio) {
1833 size_t remains = tocopy;
1834 for(; remains; remains--)
1835 uiomove("", 1, uio);
1836 }
1837 else
1838 bzero(data, tocopy);
1839 } else {
1840 error = ntfs_uncompunit(ntmp, uup, cup);
1841 if (error)
1842 break;
1843 if (uio)
1844 uiomove(uup + off, tocopy, uio);
1845 else
1846 memcpy(data, uup + off, tocopy);
1847 }
1848
1849 left -= tocopy;
1850 data = data + tocopy;
1851 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
1852 cn += NTFS_COMPUNIT_CL;
1853 }
1854
1855 FREE(uup, M_NTFSDECOMP);
1856 FREE(cup, M_NTFSDECOMP);
1857 } else
1858 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
1859 roff, rsize, rdata, &init, uio);
1860 ntfs_ntvattrrele(vap);
1861 return (error);
1862 }
1863
1864 #if UNUSED_CODE
1865 int
1866 ntfs_parserun(
1867 cn_t * cn,
1868 cn_t * cl,
1869 u_int8_t * run,
1870 u_long len,
1871 u_long *off)
1872 {
1873 u_int8_t sz;
1874 int i;
1875
1876 if (NULL == run) {
1877 printf("ntfs_parsetun: run == NULL\n");
1878 return (EINVAL);
1879 }
1880 sz = run[(*off)++];
1881 if (0 == sz) {
1882 printf("ntfs_parserun: trying to go out of run\n");
1883 return (E2BIG);
1884 }
1885 *cl = 0;
1886 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1887 printf("ntfs_parserun: " \
1888 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1889 sz, len, *off);
1890 return (EINVAL);
1891 }
1892 for (i = 0; i < (sz & 0xF); i++)
1893 *cl += (u_int32_t) run[(*off)++] << (i << 3);
1894
1895 sz >>= 4;
1896 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1897 printf("ntfs_parserun: " \
1898 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1899 sz, len, *off);
1900 return (EINVAL);
1901 }
1902 for (i = 0; i < (sz & 0xF); i++)
1903 *cn += (u_int32_t) run[(*off)++] << (i << 3);
1904
1905 return (0);
1906 }
1907 #endif
1908
1909 /*
1910 * Process fixup routine on given buffer.
1911 */
1912 int
1913 ntfs_procfixups(
1914 struct ntfsmount * ntmp,
1915 u_int32_t magic,
1916 caddr_t buf,
1917 size_t len)
1918 {
1919 struct fixuphdr *fhp = (struct fixuphdr *) buf;
1920 int i;
1921 u_int16_t fixup;
1922 u_int16_t *fxp;
1923 u_int16_t *cfxp;
1924
1925 if (fhp->fh_magic != magic) {
1926 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
1927 fhp->fh_magic, magic);
1928 return (EINVAL);
1929 }
1930 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
1931 printf("ntfs_procfixups: " \
1932 "bad fixups number: %d for %ld bytes block\n",
1933 fhp->fh_fnum, (long)len); /* XXX printf kludge */
1934 return (EINVAL);
1935 }
1936 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
1937 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
1938 return (EINVAL);
1939 }
1940 fxp = (u_int16_t *) (buf + fhp->fh_foff);
1941 cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
1942 fixup = *fxp++;
1943 for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
1944 if (*cfxp != fixup) {
1945 printf("ntfs_procfixups: fixup %d doesn't match\n", i);
1946 return (EINVAL);
1947 }
1948 *cfxp = *fxp;
1949 cfxp = (u_int16_t *)((caddr_t)cfxp + ntmp->ntm_bps);
1950 }
1951 return (0);
1952 }
1953
1954 #if UNUSED_CODE
1955 int
1956 ntfs_runtocn(
1957 cn_t * cn,
1958 struct ntfsmount * ntmp,
1959 u_int8_t * run,
1960 u_long len,
1961 cn_t vcn)
1962 {
1963 cn_t ccn = 0;
1964 cn_t ccl = 0;
1965 u_long off = 0;
1966 int error = 0;
1967
1968 #if NTFS_DEBUG
1969 int i;
1970 printf("ntfs_runtocn: run: 0x%p, %ld bytes, vcn:%ld\n",
1971 run, len, (u_long) vcn);
1972 printf("ntfs_runtocn: run: ");
1973 for (i = 0; i < len; i++)
1974 printf("0x%02x ", run[i]);
1975 printf("\n");
1976 #endif
1977
1978 if (NULL == run) {
1979 printf("ntfs_runtocn: run == NULL\n");
1980 return (EINVAL);
1981 }
1982 do {
1983 if (run[off] == 0) {
1984 printf("ntfs_runtocn: vcn too big\n");
1985 return (E2BIG);
1986 }
1987 vcn -= ccl;
1988 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
1989 if (error) {
1990 printf("ntfs_runtocn: ntfs_parserun failed\n");
1991 return (error);
1992 }
1993 } while (ccl <= vcn);
1994 *cn = ccn + vcn;
1995 return (0);
1996 }
1997 #endif
1998
1999 /*
2000 * this initializes toupper table & dependant variables to be ready for
2001 * later work
2002 */
2003 void
2004 ntfs_toupper_init()
2005 {
2006 ntfs_toupper_tab = (wchar *) NULL;
2007 lockinit(&ntfs_toupper_lock, PVFS, "ntfs_toupper", 0, 0);
2008 ntfs_toupper_usecount = 0;
2009 }
2010
2011 /*
2012 * if the ntfs_toupper_tab[] is filled already, just raise use count;
2013 * otherwise read the data from the filesystem we are currently mounting
2014 */
2015 int
2016 ntfs_toupper_use(mp, ntmp)
2017 struct mount *mp;
2018 struct ntfsmount *ntmp;
2019 {
2020 int error = 0;
2021 struct vnode *vp;
2022
2023 /* get exclusive access */
2024 lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
2025
2026 /* only read the translation data from a file if it hasn't been
2027 * read already */
2028 if (ntfs_toupper_tab)
2029 goto out;
2030
2031 /*
2032 * Read in Unicode lowercase -> uppercase translation file.
2033 * XXX for now, just the first 256 entries are used anyway,
2034 * so don't bother reading more
2035 */
2036 MALLOC(ntfs_toupper_tab, wchar *, 256 * 256 * sizeof(wchar),
2037 M_NTFSRDATA, M_WAITOK);
2038
2039 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp)))
2040 goto out;
2041 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
2042 0, 256*256*sizeof(wchar), (char *) ntfs_toupper_tab,
2043 NULL);
2044 vput(vp);
2045
2046 out:
2047 ntfs_toupper_usecount++;
2048 lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL);
2049 return (error);
2050 }
2051
2052 /*
2053 * lower the use count and if it reaches zero, free the memory
2054 * tied by toupper table
2055 */
2056 void
2057 ntfs_toupper_unuse()
2058 {
2059 /* get exclusive access */
2060 lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
2061
2062 ntfs_toupper_usecount--;
2063 if (ntfs_toupper_usecount == 0) {
2064 FREE(ntfs_toupper_tab, M_NTFSRDATA);
2065 ntfs_toupper_tab = NULL;
2066 }
2067 #ifdef DIAGNOSTIC
2068 else if (ntfs_toupper_usecount < 0) {
2069 panic("ntfs_toupper_unuse(): use count negative: %d",
2070 ntfs_toupper_usecount);
2071 }
2072 #endif
2073
2074 /* release the lock */
2075 lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL);
2076 }
Cache object: f597b60a7efa073b5cb72e1d4c0fe50a
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