1 /* $NetBSD: ntfs_subr.c,v 1.23 1999/10/31 19:45:26 jdolecek 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 * $FreeBSD: releng/5.3/sys/fs/ntfs/ntfs_subr.c 132772 2004-07-28 06:30:43Z kan $
29 */
30
31 #include <sys/param.h>
32 #include <sys/types.h>
33 #include <sys/systm.h>
34 #include <sys/namei.h>
35 #include <sys/kernel.h>
36 #include <sys/vnode.h>
37 #include <sys/mount.h>
38 #include <sys/bio.h>
39 #include <sys/buf.h>
40 #include <sys/file.h>
41 #include <sys/malloc.h>
42 #include <sys/lock.h>
43 #include <sys/iconv.h>
44
45 /* #define NTFS_DEBUG 1 */
46 #include <fs/ntfs/ntfs.h>
47 #include <fs/ntfs/ntfsmount.h>
48 #include <fs/ntfs/ntfs_inode.h>
49 #include <fs/ntfs/ntfs_vfsops.h>
50 #include <fs/ntfs/ntfs_subr.h>
51 #include <fs/ntfs/ntfs_compr.h>
52 #include <fs/ntfs/ntfs_ihash.h>
53
54 MALLOC_DEFINE(M_NTFSNTVATTR, "NTFS vattr", "NTFS file attribute information");
55 MALLOC_DEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
56 MALLOC_DEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
57 MALLOC_DEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
58
59 static int ntfs_ntlookupattr(struct ntfsmount *, const char *, int, int *, char **);
60 static int ntfs_findvattr(struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t);
61 static int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
62 static int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
63
64 /* table for mapping Unicode chars into uppercase; it's filled upon first
65 * ntfs mount, freed upon last ntfs umount */
66 static wchar *ntfs_toupper_tab;
67 #define NTFS_TOUPPER(ch) (ntfs_toupper_tab[(ch)])
68 static struct lock ntfs_toupper_lock;
69 static signed int ntfs_toupper_usecount;
70
71 struct iconv_functions *ntfs_iconv = NULL;
72
73 /* support macro for ntfs_ntvattrget() */
74 #define NTFS_AALPCMP(aalp,type,name,namelen) ( \
75 (aalp->al_type == type) && (aalp->al_namelen == namelen) && \
76 !NTFS_UASTRCMP(aalp->al_name,aalp->al_namelen,name,namelen) )
77
78 /*
79 *
80 */
81 int
82 ntfs_ntvattrrele(vap)
83 struct ntvattr * vap;
84 {
85 dprintf(("ntfs_ntvattrrele: ino: %d, type: 0x%x\n",
86 vap->va_ip->i_number, vap->va_type));
87
88 ntfs_ntrele(vap->va_ip);
89
90 return (0);
91 }
92
93 /*
94 * find the attribute in the ntnode
95 */
96 static int
97 ntfs_findvattr(ntmp, ip, lvapp, vapp, type, name, namelen, vcn)
98 struct ntfsmount *ntmp;
99 struct ntnode *ip;
100 struct ntvattr **lvapp, **vapp;
101 u_int32_t type;
102 const char *name;
103 size_t namelen;
104 cn_t vcn;
105 {
106 int error;
107 struct ntvattr *vap;
108
109 if((ip->i_flag & IN_LOADED) == 0) {
110 dprintf(("ntfs_findvattr: node not loaded, ino: %d\n",
111 ip->i_number));
112 error = ntfs_loadntnode(ntmp,ip);
113 if (error) {
114 printf("ntfs_findvattr: FAILED TO LOAD INO: %d\n",
115 ip->i_number);
116 return (error);
117 }
118 }
119
120 *lvapp = NULL;
121 *vapp = NULL;
122 LIST_FOREACH(vap, &ip->i_valist, va_list) {
123 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %d - %d\n", \
124 vap->va_type, (u_int32_t) vap->va_vcnstart, \
125 (u_int32_t) vap->va_vcnend));
126 if ((vap->va_type == type) &&
127 (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
128 (vap->va_namelen == namelen) &&
129 (strncmp(name, vap->va_name, namelen) == 0)) {
130 *vapp = vap;
131 ntfs_ntref(vap->va_ip);
132 return (0);
133 }
134 if (vap->va_type == NTFS_A_ATTRLIST)
135 *lvapp = vap;
136 }
137
138 return (-1);
139 }
140
141 /*
142 * Search attribute specifed in ntnode (load ntnode if nessecary).
143 * If not found but ATTR_A_ATTRLIST present, read it in and search throught.
144 * VOP_VGET node needed, and lookup througth it's ntnode (load if nessesary).
145 *
146 * ntnode should be locked
147 */
148 int
149 ntfs_ntvattrget(
150 struct ntfsmount * ntmp,
151 struct ntnode * ip,
152 u_int32_t type,
153 const char *name,
154 cn_t vcn,
155 struct ntvattr ** vapp)
156 {
157 struct ntvattr *lvap = NULL;
158 struct attr_attrlist *aalp;
159 struct attr_attrlist *nextaalp;
160 struct vnode *newvp;
161 struct ntnode *newip;
162 caddr_t alpool;
163 size_t namelen, len;
164 int error;
165
166 *vapp = NULL;
167
168 if (name) {
169 dprintf(("ntfs_ntvattrget: " \
170 "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
171 ip->i_number, type, name, (u_int32_t) vcn));
172 namelen = strlen(name);
173 } else {
174 dprintf(("ntfs_ntvattrget: " \
175 "ino: %d, type: 0x%x, vcn: %d\n", \
176 ip->i_number, type, (u_int32_t) vcn));
177 name = "";
178 namelen = 0;
179 }
180
181 error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
182 if (error >= 0)
183 return (error);
184
185 if (!lvap) {
186 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
187 "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
188 ip->i_number, type, name, (u_int32_t) vcn));
189 return (ENOENT);
190 }
191 /* Scan $ATTRIBUTE_LIST for requested attribute */
192 len = lvap->va_datalen;
193 MALLOC(alpool, caddr_t, len, M_TEMP, M_WAITOK);
194 error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
195 NULL);
196 if (error)
197 goto out;
198
199 aalp = (struct attr_attrlist *) alpool;
200 nextaalp = NULL;
201
202 for(; len > 0; aalp = nextaalp) {
203 dprintf(("ntfs_ntvattrget: " \
204 "attrlist: ino: %d, attr: 0x%x, vcn: %d\n", \
205 aalp->al_inumber, aalp->al_type, \
206 (u_int32_t) aalp->al_vcnstart));
207
208 if (len > aalp->reclen) {
209 nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
210 } else {
211 nextaalp = NULL;
212 }
213 len -= aalp->reclen;
214
215 if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
216 (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
217 NTFS_AALPCMP(nextaalp, type, name, namelen)))
218 continue;
219
220 dprintf(("ntfs_ntvattrget: attribute in ino: %d\n",
221 aalp->al_inumber));
222
223 /* this is not a main record, so we can't use just plain
224 vget() */
225 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
226 NTFS_A_DATA, NULL, LK_EXCLUSIVE,
227 VG_EXT, curthread, &newvp);
228 if (error) {
229 printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
230 aalp->al_inumber);
231 goto out;
232 }
233 newip = VTONT(newvp);
234 /* XXX have to lock ntnode */
235 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
236 type, name, namelen, vcn);
237 vput(newvp);
238 if (error == 0)
239 goto out;
240 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
241 break;
242 }
243 error = ENOENT;
244
245 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
246 "ino: %d, type: 0x%x, name: %.*s, vcn: %d\n", \
247 ip->i_number, type, (int) namelen, name, (u_int32_t) vcn));
248 out:
249 FREE(alpool, M_TEMP);
250 return (error);
251 }
252
253 /*
254 * Read ntnode from disk, make ntvattr list.
255 *
256 * ntnode should be locked
257 */
258 int
259 ntfs_loadntnode(
260 struct ntfsmount * ntmp,
261 struct ntnode * ip)
262 {
263 struct filerec *mfrp;
264 daddr_t bn;
265 int error,off;
266 struct attr *ap;
267 struct ntvattr *nvap;
268
269 dprintf(("ntfs_loadntnode: loading ino: %d\n",ip->i_number));
270
271 MALLOC(mfrp, struct filerec *, ntfs_bntob(ntmp->ntm_bpmftrec),
272 M_TEMP, M_WAITOK);
273
274 if (ip->i_number < NTFS_SYSNODESNUM) {
275 struct buf *bp;
276
277 dprintf(("ntfs_loadntnode: read system node\n"));
278
279 bn = ntfs_cntobn(ntmp->ntm_mftcn) +
280 ntmp->ntm_bpmftrec * ip->i_number;
281
282 error = bread(ntmp->ntm_devvp,
283 bn, ntfs_bntob(ntmp->ntm_bpmftrec),
284 NOCRED, &bp);
285 if (error) {
286 printf("ntfs_loadntnode: BREAD FAILED\n");
287 brelse(bp);
288 goto out;
289 }
290 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
291 bqrelse(bp);
292 } else {
293 struct vnode *vp;
294
295 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
296 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
297 ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
298 ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
299 if (error) {
300 printf("ntfs_loadntnode: ntfs_readattr failed\n");
301 goto out;
302 }
303 }
304
305 /* Check if magic and fixups are correct */
306 error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp,
307 ntfs_bntob(ntmp->ntm_bpmftrec));
308 if (error) {
309 printf("ntfs_loadntnode: BAD MFT RECORD %d\n",
310 (u_int32_t) ip->i_number);
311 goto out;
312 }
313
314 dprintf(("ntfs_loadntnode: load attrs for ino: %d\n",ip->i_number));
315 off = mfrp->fr_attroff;
316 ap = (struct attr *) ((caddr_t)mfrp + off);
317
318 LIST_INIT(&ip->i_valist);
319
320 while (ap->a_hdr.a_type != -1) {
321 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
322 if (error)
323 break;
324 nvap->va_ip = ip;
325
326 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
327
328 off += ap->a_hdr.reclen;
329 ap = (struct attr *) ((caddr_t)mfrp + off);
330 }
331 if (error) {
332 printf("ntfs_loadntnode: failed to load attr ino: %d\n",
333 ip->i_number);
334 goto out;
335 }
336
337 ip->i_mainrec = mfrp->fr_mainrec;
338 ip->i_nlink = mfrp->fr_nlink;
339 ip->i_frflag = mfrp->fr_flags;
340
341 ip->i_flag |= IN_LOADED;
342
343 out:
344 FREE(mfrp, M_TEMP);
345 return (error);
346 }
347
348 /*
349 * Routine locks ntnode and increase usecount, just opposite of
350 * ntfs_ntput().
351 */
352 int
353 ntfs_ntget(ip)
354 struct ntnode *ip;
355 {
356 dprintf(("ntfs_ntget: get ntnode %d: %p, usecount: %d\n",
357 ip->i_number, ip, ip->i_usecount));
358
359 mtx_lock(&ip->i_interlock);
360 ip->i_usecount++;
361 lockmgr(&ip->i_lock, LK_EXCLUSIVE | LK_INTERLOCK, &ip->i_interlock,
362 NULL);
363
364 return 0;
365 }
366
367 /*
368 * Routine search ntnode in hash, if found: lock, inc usecount and return.
369 * If not in hash allocate structure for ntnode, prefill it, lock,
370 * inc count and return.
371 *
372 * ntnode returned locked
373 */
374 int
375 ntfs_ntlookup(
376 struct ntfsmount * ntmp,
377 ino_t ino,
378 struct ntnode ** ipp)
379 {
380 struct ntnode *ip;
381
382 dprintf(("ntfs_ntlookup: looking for ntnode %d\n", ino));
383
384 do {
385 if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
386 ntfs_ntget(ip);
387 dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
388 ino, ip, ip->i_usecount));
389 *ipp = ip;
390 return (0);
391 }
392 } while (lockmgr(&ntfs_hashlock, LK_EXCLUSIVE | LK_SLEEPFAIL, NULL,
393 NULL));
394
395 MALLOC(ip, struct ntnode *, sizeof(struct ntnode), M_NTFSNTNODE,
396 M_WAITOK | M_ZERO);
397 ddprintf(("ntfs_ntlookup: allocating ntnode: %d: %p\n", ino, ip));
398
399 /* Generic initialization */
400 ip->i_devvp = ntmp->ntm_devvp;
401 ip->i_dev = ntmp->ntm_dev;
402 ip->i_number = ino;
403 ip->i_mp = ntmp;
404
405 LIST_INIT(&ip->i_fnlist);
406 VREF(ip->i_devvp);
407
408 /* init lock and lock the newborn ntnode */
409 lockinit(&ip->i_lock, PINOD, "ntnode", 0, LK_EXCLUSIVE);
410 mtx_init(&ip->i_interlock, "ntnode interlock", NULL, MTX_DEF);
411 ntfs_ntget(ip);
412
413 ntfs_nthashins(ip);
414
415 lockmgr(&ntfs_hashlock, LK_RELEASE, NULL, NULL);
416
417 *ipp = ip;
418
419 dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
420 ino, ip, ip->i_usecount));
421
422 return (0);
423 }
424
425 /*
426 * Decrement usecount of ntnode and unlock it, if usecount reach zero,
427 * deallocate ntnode.
428 *
429 * ntnode should be locked on entry, and unlocked on return.
430 */
431 void
432 ntfs_ntput(ip)
433 struct ntnode *ip;
434 {
435 struct ntvattr *vap;
436
437 dprintf(("ntfs_ntput: rele ntnode %d: %p, usecount: %d\n",
438 ip->i_number, ip, ip->i_usecount));
439
440 mtx_lock(&ip->i_interlock);
441 ip->i_usecount--;
442
443 #ifdef DIAGNOSTIC
444 if (ip->i_usecount < 0) {
445 panic("ntfs_ntput: ino: %d usecount: %d \n",
446 ip->i_number,ip->i_usecount);
447 }
448 #endif
449
450 if (ip->i_usecount > 0) {
451 lockmgr(&ip->i_lock, LK_RELEASE|LK_INTERLOCK, &ip->i_interlock,
452 NULL);
453 return;
454 }
455
456 dprintf(("ntfs_ntput: deallocating ntnode: %d\n", ip->i_number));
457
458 if (LIST_FIRST(&ip->i_fnlist))
459 panic("ntfs_ntput: ntnode has fnodes\n");
460
461 ntfs_nthashrem(ip);
462
463 while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) {
464 LIST_REMOVE(vap,va_list);
465 ntfs_freentvattr(vap);
466 }
467 mtx_unlock(&ip->i_interlock);
468 mtx_destroy(&ip->i_interlock);
469 lockdestroy(&ip->i_lock);
470 vrele(ip->i_devvp);
471 FREE(ip, M_NTFSNTNODE);
472 }
473
474 /*
475 * increment usecount of ntnode
476 */
477 void
478 ntfs_ntref(ip)
479 struct ntnode *ip;
480 {
481 mtx_lock(&ip->i_interlock);
482 ip->i_usecount++;
483 mtx_unlock(&ip->i_interlock);
484
485 dprintf(("ntfs_ntref: ino %d, usecount: %d\n",
486 ip->i_number, ip->i_usecount));
487
488 }
489
490 /*
491 * Decrement usecount of ntnode.
492 */
493 void
494 ntfs_ntrele(ip)
495 struct ntnode *ip;
496 {
497 dprintf(("ntfs_ntrele: rele ntnode %d: %p, usecount: %d\n",
498 ip->i_number, ip, ip->i_usecount));
499
500 mtx_lock(&ip->i_interlock);
501 ip->i_usecount--;
502
503 if (ip->i_usecount < 0)
504 panic("ntfs_ntrele: ino: %d usecount: %d \n",
505 ip->i_number,ip->i_usecount);
506 mtx_unlock(&ip->i_interlock);
507 }
508
509 /*
510 * Deallocate all memory allocated for ntvattr
511 */
512 void
513 ntfs_freentvattr(vap)
514 struct ntvattr * vap;
515 {
516 if (vap->va_flag & NTFS_AF_INRUN) {
517 if (vap->va_vruncn)
518 FREE(vap->va_vruncn, M_NTFSRUN);
519 if (vap->va_vruncl)
520 FREE(vap->va_vruncl, M_NTFSRUN);
521 } else {
522 if (vap->va_datap)
523 FREE(vap->va_datap, M_NTFSRDATA);
524 }
525 FREE(vap, M_NTFSNTVATTR);
526 }
527
528 /*
529 * Convert disk image of attribute into ntvattr structure,
530 * runs are expanded also.
531 */
532 int
533 ntfs_attrtontvattr(
534 struct ntfsmount * ntmp,
535 struct ntvattr ** rvapp,
536 struct attr * rap)
537 {
538 int error, i;
539 struct ntvattr *vap;
540
541 error = 0;
542 *rvapp = NULL;
543
544 MALLOC(vap, struct ntvattr *, sizeof(struct ntvattr),
545 M_NTFSNTVATTR, M_WAITOK | M_ZERO);
546 vap->va_ip = NULL;
547 vap->va_flag = rap->a_hdr.a_flag;
548 vap->va_type = rap->a_hdr.a_type;
549 vap->va_compression = rap->a_hdr.a_compression;
550 vap->va_index = rap->a_hdr.a_index;
551
552 ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
553
554 vap->va_namelen = rap->a_hdr.a_namelen;
555 if (rap->a_hdr.a_namelen) {
556 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
557 ddprintf((", name:["));
558 for (i = 0; i < vap->va_namelen; i++) {
559 vap->va_name[i] = unp[i];
560 ddprintf(("%c", vap->va_name[i]));
561 }
562 ddprintf(("]"));
563 }
564 if (vap->va_flag & NTFS_AF_INRUN) {
565 ddprintf((", nonres."));
566 vap->va_datalen = rap->a_nr.a_datalen;
567 vap->va_allocated = rap->a_nr.a_allocated;
568 vap->va_vcnstart = rap->a_nr.a_vcnstart;
569 vap->va_vcnend = rap->a_nr.a_vcnend;
570 vap->va_compressalg = rap->a_nr.a_compressalg;
571 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
572 &(vap->va_vruncnt),
573 (caddr_t) rap + rap->a_nr.a_dataoff);
574 } else {
575 vap->va_compressalg = 0;
576 ddprintf((", res."));
577 vap->va_datalen = rap->a_r.a_datalen;
578 vap->va_allocated = rap->a_r.a_datalen;
579 vap->va_vcnstart = 0;
580 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
581 MALLOC(vap->va_datap, caddr_t, vap->va_datalen,
582 M_NTFSRDATA, M_WAITOK);
583 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
584 rap->a_r.a_datalen);
585 }
586 ddprintf((", len: %d", vap->va_datalen));
587
588 if (error)
589 FREE(vap, M_NTFSNTVATTR);
590 else
591 *rvapp = vap;
592
593 ddprintf(("\n"));
594
595 return (error);
596 }
597
598 /*
599 * Expand run into more utilizable and more memory eating format.
600 */
601 int
602 ntfs_runtovrun(
603 cn_t ** rcnp,
604 cn_t ** rclp,
605 u_long * rcntp,
606 u_int8_t * run)
607 {
608 u_int32_t off;
609 u_int32_t sz, i;
610 cn_t *cn;
611 cn_t *cl;
612 u_long cnt;
613 cn_t prev;
614 cn_t tmp;
615
616 off = 0;
617 cnt = 0;
618 i = 0;
619 while (run[off]) {
620 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
621 cnt++;
622 }
623 MALLOC(cn, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
624 MALLOC(cl, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
625
626 off = 0;
627 cnt = 0;
628 prev = 0;
629 while (run[off]) {
630
631 sz = run[off++];
632 cl[cnt] = 0;
633
634 for (i = 0; i < (sz & 0xF); i++)
635 cl[cnt] += (u_int32_t) run[off++] << (i << 3);
636
637 sz >>= 4;
638 if (run[off + sz - 1] & 0x80) {
639 tmp = ((u_int64_t) - 1) << (sz << 3);
640 for (i = 0; i < sz; i++)
641 tmp |= (u_int64_t) run[off++] << (i << 3);
642 } else {
643 tmp = 0;
644 for (i = 0; i < sz; i++)
645 tmp |= (u_int64_t) run[off++] << (i << 3);
646 }
647 if (tmp)
648 prev = cn[cnt] = prev + tmp;
649 else
650 cn[cnt] = tmp;
651
652 cnt++;
653 }
654 *rcnp = cn;
655 *rclp = cl;
656 *rcntp = cnt;
657 return (0);
658 }
659
660 /*
661 * Compare unicode and ascii string case insens.
662 */
663 static int
664 ntfs_uastricmp(ntmp, ustr, ustrlen, astr, astrlen)
665 struct ntfsmount *ntmp;
666 const wchar *ustr;
667 size_t ustrlen;
668 const char *astr;
669 size_t astrlen;
670 {
671 int len;
672 size_t i, j, mbstrlen = astrlen;
673 int res;
674 wchar wc;
675
676 if (ntmp->ntm_ic_l2u) {
677 for (i = 0, j = 0; i < ustrlen && j < astrlen; i++, j++) {
678 if (j < astrlen -1) {
679 wc = (wchar)astr[j]<<8 | (astr[j+1]&0xFF);
680 len = 2;
681 } else {
682 wc = (wchar)astr[j]<<8 & 0xFF00;
683 len = 1;
684 }
685 res = ((int) NTFS_TOUPPER(ustr[i])) -
686 ((int)NTFS_TOUPPER(NTFS_82U(wc, &len)));
687 j += len - 1;
688 mbstrlen -= len - 1;
689
690 if (res)
691 return res;
692 }
693 } else {
694 /*
695 * We use NTFS_82U(NTFS_U28(c)) to get rid of unicode
696 * symbols not covered by translation table
697 */
698 for (i = 0; i < ustrlen && i < astrlen; i++) {
699 res = ((int) NTFS_TOUPPER(NTFS_82U(NTFS_U28(ustr[i]), &len))) -
700 ((int)NTFS_TOUPPER(NTFS_82U((wchar)astr[i], &len)));
701 if (res)
702 return res;
703 }
704 }
705 return (ustrlen - mbstrlen);
706 }
707
708 /*
709 * Compare unicode and ascii string case sens.
710 */
711 static int
712 ntfs_uastrcmp(ntmp, ustr, ustrlen, astr, astrlen)
713 struct ntfsmount *ntmp;
714 const wchar *ustr;
715 size_t ustrlen;
716 const char *astr;
717 size_t astrlen;
718 {
719 char u, l;
720 size_t i, j, mbstrlen = astrlen;
721 int res;
722 wchar wc;
723
724 for (i = 0, j = 0; (i < ustrlen) && (j < astrlen); i++, j++) {
725 res = 0;
726 wc = NTFS_U28(ustr[i]);
727 u = (char)(wc>>8);
728 l = (char)wc;
729 if (u != '\0' && j < astrlen -1) {
730 res = (int) (u - astr[j++]);
731 mbstrlen--;
732 }
733 res = (res<<8) + (int) (l - astr[j]);
734 if (res)
735 return res;
736 }
737 return (ustrlen - mbstrlen);
738 }
739
740 /*
741 * Search fnode in ntnode, if not found allocate and preinitialize.
742 *
743 * ntnode should be locked on entry.
744 */
745 int
746 ntfs_fget(
747 struct ntfsmount *ntmp,
748 struct ntnode *ip,
749 int attrtype,
750 char *attrname,
751 struct fnode **fpp)
752 {
753 struct fnode *fp;
754
755 dprintf(("ntfs_fget: ino: %d, attrtype: 0x%x, attrname: %s\n",
756 ip->i_number,attrtype, attrname?attrname:""));
757 *fpp = NULL;
758 LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist){
759 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
760 fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
761
762 if ((attrtype == fp->f_attrtype) &&
763 ((!attrname && !fp->f_attrname) ||
764 (attrname && fp->f_attrname &&
765 !strcmp(attrname,fp->f_attrname)))){
766 dprintf(("ntfs_fget: found existed: %p\n",fp));
767 *fpp = fp;
768 }
769 }
770
771 if (*fpp)
772 return (0);
773
774 MALLOC(fp, struct fnode *, sizeof(struct fnode), M_NTFSFNODE,
775 M_WAITOK | M_ZERO);
776 dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
777
778 fp->f_ip = ip;
779 if (attrname) {
780 fp->f_flag |= FN_AATTRNAME;
781 MALLOC(fp->f_attrname, char *, strlen(attrname)+1, M_TEMP, M_WAITOK);
782 strcpy(fp->f_attrname, attrname);
783 } else
784 fp->f_attrname = NULL;
785 fp->f_attrtype = attrtype;
786
787 ntfs_ntref(ip);
788
789 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
790
791 *fpp = fp;
792
793 return (0);
794 }
795
796 /*
797 * Deallocate fnode, remove it from ntnode's fnode list.
798 *
799 * ntnode should be locked.
800 */
801 void
802 ntfs_frele(
803 struct fnode *fp)
804 {
805 struct ntnode *ip = FTONT(fp);
806
807 dprintf(("ntfs_frele: fnode: %p for %d: %p\n", fp, ip->i_number, ip));
808
809 dprintf(("ntfs_frele: deallocating fnode\n"));
810 LIST_REMOVE(fp,f_fnlist);
811 if (fp->f_flag & FN_AATTRNAME)
812 FREE(fp->f_attrname, M_TEMP);
813 if (fp->f_dirblbuf)
814 FREE(fp->f_dirblbuf, M_NTFSDIR);
815 FREE(fp, M_NTFSFNODE);
816 ntfs_ntrele(ip);
817 }
818
819 /*
820 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME],
821 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
822 * If $ATTR_TYPE nott specifed, ATTR_A_DATA assumed.
823 */
824 static int
825 ntfs_ntlookupattr(
826 struct ntfsmount * ntmp,
827 const char * name,
828 int namelen,
829 int *attrtype,
830 char **attrname)
831 {
832 const char *sys;
833 size_t syslen, i;
834 struct ntvattrdef *adp;
835
836 if (namelen == 0)
837 return (0);
838
839 if (name[0] == '$') {
840 sys = name;
841 for (syslen = 0; syslen < namelen; syslen++) {
842 if(sys[syslen] == ':') {
843 name++;
844 namelen--;
845 break;
846 }
847 }
848 name += syslen;
849 namelen -= syslen;
850
851 adp = ntmp->ntm_ad;
852 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
853 if (syslen != adp->ad_namelen ||
854 strncmp(sys, adp->ad_name, syslen) != 0)
855 continue;
856
857 *attrtype = adp->ad_type;
858 goto out;
859 }
860 return (ENOENT);
861 } else
862 *attrtype = NTFS_A_DATA;
863
864 out:
865 if (namelen) {
866 MALLOC((*attrname), char *, namelen, M_TEMP, M_WAITOK);
867 memcpy((*attrname), name, namelen);
868 (*attrname)[namelen] = '\0';
869 }
870
871 return (0);
872 }
873
874 /*
875 * Lookup specifed node for filename, matching cnp,
876 * return fnode filled.
877 */
878 int
879 ntfs_ntlookupfile(
880 struct ntfsmount * ntmp,
881 struct vnode * vp,
882 struct componentname * cnp,
883 struct vnode ** vpp)
884 {
885 struct fnode *fp = VTOF(vp);
886 struct ntnode *ip = FTONT(fp);
887 struct ntvattr *vap; /* Root attribute */
888 cn_t cn; /* VCN in current attribute */
889 caddr_t rdbuf; /* Buffer to read directory's blocks */
890 u_int32_t blsize;
891 u_int32_t rdsize; /* Length of data to read from current block */
892 struct attr_indexentry *iep;
893 int error, res, anamelen, fnamelen;
894 const char *fname,*aname;
895 u_int32_t aoff;
896 int attrtype = NTFS_A_DATA;
897 char *attrname = NULL;
898 struct fnode *nfp;
899 struct vnode *nvp;
900 enum vtype f_type;
901
902 error = ntfs_ntget(ip);
903 if (error)
904 return (error);
905
906 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
907 if (error || (vap->va_flag & NTFS_AF_INRUN))
908 return (ENOTDIR);
909
910 blsize = vap->va_a_iroot->ir_size;
911 rdsize = vap->va_datalen;
912
913 /*
914 * Divide file name into: foofilefoofilefoofile[:attrspec]
915 * Store like this: fname:fnamelen [aname:anamelen]
916 */
917 fname = cnp->cn_nameptr;
918 aname = NULL;
919 anamelen = 0;
920 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
921 if(fname[fnamelen] == ':') {
922 aname = fname + fnamelen + 1;
923 anamelen = cnp->cn_namelen - fnamelen - 1;
924 dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
925 fname, fnamelen, aname, anamelen));
926 break;
927 }
928
929 dprintf(("ntfs_ntlookupfile: blksz: %d, rdsz: %d\n", blsize, rdsize));
930
931 MALLOC(rdbuf, caddr_t, blsize, M_TEMP, M_WAITOK);
932
933 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
934 0, rdsize, rdbuf, NULL);
935 if (error)
936 goto fail;
937
938 aoff = sizeof(struct attr_indexroot);
939
940 do {
941 iep = (struct attr_indexentry *) (rdbuf + aoff);
942
943 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
944 aoff += iep->reclen,
945 iep = (struct attr_indexentry *) (rdbuf + aoff))
946 {
947 ddprintf(("scan: %d, %d\n",
948 (u_int32_t) iep->ie_number,
949 (u_int32_t) iep->ie_fnametype));
950
951 /* check the name - the case-insensitible check
952 * has to come first, to break from this for loop
953 * if needed, so we can dive correctly */
954 res = NTFS_UASTRICMP(iep->ie_fname, iep->ie_fnamelen,
955 fname, fnamelen);
956 if (res > 0) break;
957 if (res < 0) continue;
958
959 if (iep->ie_fnametype == 0 ||
960 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
961 {
962 res = NTFS_UASTRCMP(iep->ie_fname,
963 iep->ie_fnamelen, fname, fnamelen);
964 if (res != 0) continue;
965 }
966
967 if (aname) {
968 error = ntfs_ntlookupattr(ntmp,
969 aname, anamelen,
970 &attrtype, &attrname);
971 if (error)
972 goto fail;
973 }
974
975 /* Check if we've found ourself */
976 if ((iep->ie_number == ip->i_number) &&
977 (attrtype == fp->f_attrtype) &&
978 ((!attrname && !fp->f_attrname) ||
979 (attrname && fp->f_attrname &&
980 !strcmp(attrname, fp->f_attrname))))
981 {
982 VREF(vp);
983 *vpp = vp;
984 error = 0;
985 goto fail;
986 }
987
988 /* vget node, but don't load it */
989 error = ntfs_vgetex(ntmp->ntm_mountp,
990 iep->ie_number, attrtype, attrname,
991 LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
992 curthread, &nvp);
993
994 /* free the buffer returned by ntfs_ntlookupattr() */
995 if (attrname) {
996 FREE(attrname, M_TEMP);
997 attrname = NULL;
998 }
999
1000 if (error)
1001 goto fail;
1002
1003 nfp = VTOF(nvp);
1004
1005 if (nfp->f_flag & FN_VALID) {
1006 *vpp = nvp;
1007 goto fail;
1008 }
1009
1010 nfp->f_fflag = iep->ie_fflag;
1011 nfp->f_pnumber = iep->ie_fpnumber;
1012 nfp->f_times = iep->ie_ftimes;
1013
1014 if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
1015 (nfp->f_attrtype == NTFS_A_DATA) &&
1016 (nfp->f_attrname == NULL))
1017 f_type = VDIR;
1018 else
1019 f_type = VREG;
1020
1021 nvp->v_type = f_type;
1022
1023 if ((nfp->f_attrtype == NTFS_A_DATA) &&
1024 (nfp->f_attrname == NULL))
1025 {
1026 /* Opening default attribute */
1027 nfp->f_size = iep->ie_fsize;
1028 nfp->f_allocated = iep->ie_fallocated;
1029 nfp->f_flag |= FN_PRELOADED;
1030 } else {
1031 error = ntfs_filesize(ntmp, nfp,
1032 &nfp->f_size, &nfp->f_allocated);
1033 if (error) {
1034 vput(nvp);
1035 goto fail;
1036 }
1037 }
1038
1039 nfp->f_flag &= ~FN_VALID;
1040 *vpp = nvp;
1041 goto fail;
1042 }
1043
1044 /* Dive if possible */
1045 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
1046 dprintf(("ntfs_ntlookupfile: diving\n"));
1047
1048 cn = *(cn_t *) (rdbuf + aoff +
1049 iep->reclen - sizeof(cn_t));
1050 rdsize = blsize;
1051
1052 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
1053 ntfs_cntob(cn), rdsize, rdbuf, NULL);
1054 if (error)
1055 goto fail;
1056
1057 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1058 rdbuf, rdsize);
1059 if (error)
1060 goto fail;
1061
1062 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
1063 0x18);
1064 } else {
1065 dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
1066 error = ENOENT;
1067 break;
1068 }
1069 } while (1);
1070
1071 dprintf(("finish\n"));
1072
1073 fail:
1074 if (attrname) FREE(attrname, M_TEMP);
1075 ntfs_ntvattrrele(vap);
1076 ntfs_ntput(ip);
1077 FREE(rdbuf, M_TEMP);
1078 return (error);
1079 }
1080
1081 /*
1082 * Check if name type is permitted to show.
1083 */
1084 int
1085 ntfs_isnamepermitted(
1086 struct ntfsmount * ntmp,
1087 struct attr_indexentry * iep)
1088 {
1089 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
1090 return 1;
1091
1092 switch (iep->ie_fnametype) {
1093 case 2:
1094 ddprintf(("ntfs_isnamepermitted: skiped DOS name\n"));
1095 return 0;
1096 case 0: case 1: case 3:
1097 return 1;
1098 default:
1099 printf("ntfs_isnamepermitted: " \
1100 "WARNING! Unknown file name type: %d\n",
1101 iep->ie_fnametype);
1102 break;
1103 }
1104 return 0;
1105 }
1106
1107 /*
1108 * Read ntfs dir like stream of attr_indexentry, not like btree of them.
1109 * This is done by scaning $BITMAP:$I30 for busy clusters and reading them.
1110 * Ofcouse $INDEX_ROOT:$I30 is read before. Last read values are stored in
1111 * fnode, so we can skip toward record number num almost immediatly.
1112 * Anyway this is rather slow routine. The problem is that we don't know
1113 * how many records are there in $INDEX_ALLOCATION:$I30 block.
1114 */
1115 int
1116 ntfs_ntreaddir(
1117 struct ntfsmount * ntmp,
1118 struct fnode * fp,
1119 u_int32_t num,
1120 struct attr_indexentry ** riepp)
1121 {
1122 struct ntnode *ip = FTONT(fp);
1123 struct ntvattr *vap = NULL; /* IndexRoot attribute */
1124 struct ntvattr *bmvap = NULL; /* BitMap attribute */
1125 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */
1126 caddr_t rdbuf; /* Buffer to read directory's blocks */
1127 u_char *bmp = NULL; /* Bitmap */
1128 u_int32_t blsize; /* Index allocation size (2048) */
1129 u_int32_t rdsize; /* Length of data to read */
1130 u_int32_t attrnum; /* Current attribute type */
1131 u_int32_t cpbl = 1; /* Clusters per directory block */
1132 u_int32_t blnum;
1133 struct attr_indexentry *iep;
1134 int error = ENOENT;
1135 u_int32_t aoff, cnum;
1136
1137 dprintf(("ntfs_ntreaddir: read ino: %d, num: %d\n", ip->i_number, num));
1138 error = ntfs_ntget(ip);
1139 if (error)
1140 return (error);
1141
1142 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
1143 if (error)
1144 return (ENOTDIR);
1145
1146 if (fp->f_dirblbuf == NULL) {
1147 fp->f_dirblsz = vap->va_a_iroot->ir_size;
1148 MALLOC(fp->f_dirblbuf, caddr_t,
1149 max(vap->va_datalen,fp->f_dirblsz), M_NTFSDIR, M_WAITOK);
1150 }
1151
1152 blsize = fp->f_dirblsz;
1153 rdbuf = fp->f_dirblbuf;
1154
1155 dprintf(("ntfs_ntreaddir: rdbuf: 0x%p, blsize: %d\n", rdbuf, blsize));
1156
1157 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
1158 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
1159 0, &bmvap);
1160 if (error) {
1161 error = ENOTDIR;
1162 goto fail;
1163 }
1164 MALLOC(bmp, u_char *, bmvap->va_datalen, M_TEMP, M_WAITOK);
1165 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
1166 bmvap->va_datalen, bmp, NULL);
1167 if (error)
1168 goto fail;
1169
1170 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
1171 0, &iavap);
1172 if (error) {
1173 error = ENOTDIR;
1174 goto fail;
1175 }
1176 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
1177 dprintf(("ntfs_ntreaddir: indexalloc: %d, cpbl: %d\n",
1178 iavap->va_datalen, cpbl));
1179 } else {
1180 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
1181 iavap = bmvap = NULL;
1182 bmp = NULL;
1183 }
1184
1185 /* Try use previous values */
1186 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
1187 attrnum = fp->f_lastdattr;
1188 aoff = fp->f_lastdoff;
1189 blnum = fp->f_lastdblnum;
1190 cnum = fp->f_lastdnum;
1191 } else {
1192 attrnum = NTFS_A_INDXROOT;
1193 aoff = sizeof(struct attr_indexroot);
1194 blnum = 0;
1195 cnum = 0;
1196 }
1197
1198 do {
1199 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
1200 attrnum, (u_int32_t) blnum, cnum, num, aoff));
1201 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
1202 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
1203 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
1204 if (error)
1205 goto fail;
1206
1207 if (attrnum == NTFS_A_INDX) {
1208 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1209 rdbuf, rdsize);
1210 if (error)
1211 goto fail;
1212 }
1213 if (aoff == 0)
1214 aoff = (attrnum == NTFS_A_INDX) ?
1215 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
1216 sizeof(struct attr_indexroot);
1217
1218 iep = (struct attr_indexentry *) (rdbuf + aoff);
1219 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
1220 aoff += iep->reclen,
1221 iep = (struct attr_indexentry *) (rdbuf + aoff))
1222 {
1223 if (!ntfs_isnamepermitted(ntmp, iep)) continue;
1224
1225 if (cnum >= num) {
1226 fp->f_lastdnum = cnum;
1227 fp->f_lastdoff = aoff;
1228 fp->f_lastdblnum = blnum;
1229 fp->f_lastdattr = attrnum;
1230
1231 *riepp = iep;
1232
1233 error = 0;
1234 goto fail;
1235 }
1236 cnum++;
1237 }
1238
1239 if (iavap) {
1240 if (attrnum == NTFS_A_INDXROOT)
1241 blnum = 0;
1242 else
1243 blnum++;
1244
1245 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
1246 if (bmp[blnum >> 3] & (1 << (blnum & 3)))
1247 break;
1248 blnum++;
1249 }
1250
1251 attrnum = NTFS_A_INDX;
1252 aoff = 0;
1253 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
1254 break;
1255 dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
1256 }
1257 } while (iavap);
1258
1259 *riepp = NULL;
1260 fp->f_lastdnum = 0;
1261
1262 fail:
1263 if (vap)
1264 ntfs_ntvattrrele(vap);
1265 if (bmvap)
1266 ntfs_ntvattrrele(bmvap);
1267 if (iavap)
1268 ntfs_ntvattrrele(iavap);
1269 if (bmp)
1270 FREE(bmp, M_TEMP);
1271 ntfs_ntput(ip);
1272 return (error);
1273 }
1274
1275 /*
1276 * Convert NTFS times that are in 100 ns units and begins from
1277 * 1601 Jan 1 into unix times.
1278 */
1279 struct timespec
1280 ntfs_nttimetounix(
1281 u_int64_t nt)
1282 {
1283 struct timespec t;
1284
1285 /* WindowNT times are in 100 ns and from 1601 Jan 1 */
1286 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
1287 t.tv_sec = nt / (1000 * 1000 * 10) -
1288 369LL * 365LL * 24LL * 60LL * 60LL -
1289 89LL * 1LL * 24LL * 60LL * 60LL;
1290 return (t);
1291 }
1292
1293 /*
1294 * Get file times from NTFS_A_NAME attribute.
1295 */
1296 int
1297 ntfs_times(
1298 struct ntfsmount * ntmp,
1299 struct ntnode * ip,
1300 ntfs_times_t * tm)
1301 {
1302 struct ntvattr *vap;
1303 int error;
1304
1305 dprintf(("ntfs_times: ino: %d...\n", ip->i_number));
1306
1307 error = ntfs_ntget(ip);
1308 if (error)
1309 return (error);
1310
1311 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
1312 if (error) {
1313 ntfs_ntput(ip);
1314 return (error);
1315 }
1316 *tm = vap->va_a_name->n_times;
1317 ntfs_ntvattrrele(vap);
1318 ntfs_ntput(ip);
1319
1320 return (0);
1321 }
1322
1323 /*
1324 * Get file sizes from corresponding attribute.
1325 *
1326 * ntnode under fnode should be locked.
1327 */
1328 int
1329 ntfs_filesize(
1330 struct ntfsmount * ntmp,
1331 struct fnode * fp,
1332 u_int64_t * size,
1333 u_int64_t * bytes)
1334 {
1335 struct ntvattr *vap;
1336 struct ntnode *ip = FTONT(fp);
1337 u_int64_t sz, bn;
1338 int error;
1339
1340 dprintf(("ntfs_filesize: ino: %d\n", ip->i_number));
1341
1342 error = ntfs_ntvattrget(ntmp, ip,
1343 fp->f_attrtype, fp->f_attrname, 0, &vap);
1344 if (error)
1345 return (error);
1346
1347 bn = vap->va_allocated;
1348 sz = vap->va_datalen;
1349
1350 dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
1351 (u_int32_t) sz, (u_int32_t) bn));
1352
1353 if (size)
1354 *size = sz;
1355 if (bytes)
1356 *bytes = bn;
1357
1358 ntfs_ntvattrrele(vap);
1359
1360 return (0);
1361 }
1362
1363 /*
1364 * This is one of write routine.
1365 */
1366 int
1367 ntfs_writeattr_plain(
1368 struct ntfsmount * ntmp,
1369 struct ntnode * ip,
1370 u_int32_t attrnum,
1371 char *attrname,
1372 off_t roff,
1373 size_t rsize,
1374 void *rdata,
1375 size_t * initp,
1376 struct uio *uio)
1377 {
1378 size_t init;
1379 int error = 0;
1380 off_t off = roff, left = rsize, towrite;
1381 caddr_t data = rdata;
1382 struct ntvattr *vap;
1383 *initp = 0;
1384
1385 while (left) {
1386 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1387 ntfs_btocn(off), &vap);
1388 if (error)
1389 return (error);
1390 towrite = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1391 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
1392 (u_int32_t) off, (u_int32_t) towrite,
1393 (u_int32_t) vap->va_vcnstart,
1394 (u_int32_t) vap->va_vcnend));
1395 error = ntfs_writentvattr_plain(ntmp, ip, vap,
1396 off - ntfs_cntob(vap->va_vcnstart),
1397 towrite, data, &init, uio);
1398 if (error) {
1399 printf("ntfs_writeattr_plain: " \
1400 "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
1401 (u_int32_t) off, (u_int32_t) towrite);
1402 printf("ntfs_writeattr_plain: attrib: %d - %d\n",
1403 (u_int32_t) vap->va_vcnstart,
1404 (u_int32_t) vap->va_vcnend);
1405 ntfs_ntvattrrele(vap);
1406 break;
1407 }
1408 ntfs_ntvattrrele(vap);
1409 left -= towrite;
1410 off += towrite;
1411 data = data + towrite;
1412 *initp += init;
1413 }
1414
1415 return (error);
1416 }
1417
1418 /*
1419 * This is one of write routine.
1420 *
1421 * ntnode should be locked.
1422 */
1423 int
1424 ntfs_writentvattr_plain(
1425 struct ntfsmount * ntmp,
1426 struct ntnode * ip,
1427 struct ntvattr * vap,
1428 off_t roff,
1429 size_t rsize,
1430 void *rdata,
1431 size_t * initp,
1432 struct uio *uio)
1433 {
1434 int error = 0;
1435 int off;
1436 int cnt;
1437 cn_t ccn, ccl, cn, left, cl;
1438 caddr_t data = rdata;
1439 struct buf *bp;
1440 size_t tocopy;
1441
1442 *initp = 0;
1443
1444 if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
1445 printf("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n");
1446 return ENOTTY;
1447 }
1448
1449 ddprintf(("ntfs_writentvattr_plain: data in run: %ld chains\n",
1450 vap->va_vruncnt));
1451
1452 off = roff;
1453 left = rsize;
1454 ccl = 0;
1455 ccn = 0;
1456 cnt = 0;
1457 for (; left && (cnt < vap->va_vruncnt); cnt++) {
1458 ccn = vap->va_vruncn[cnt];
1459 ccl = vap->va_vruncl[cnt];
1460
1461 ddprintf(("ntfs_writentvattr_plain: " \
1462 "left %d, cn: 0x%x, cl: %d, off: %d\n", \
1463 (u_int32_t) left, (u_int32_t) ccn, \
1464 (u_int32_t) ccl, (u_int32_t) off));
1465
1466 if (ntfs_cntob(ccl) < off) {
1467 off -= ntfs_cntob(ccl);
1468 cnt++;
1469 continue;
1470 }
1471 if (!ccn && ip->i_number != NTFS_BOOTINO)
1472 continue; /* XXX */
1473
1474 ccl -= ntfs_btocn(off);
1475 cn = ccn + ntfs_btocn(off);
1476 off = ntfs_btocnoff(off);
1477
1478 while (left && ccl) {
1479 /*
1480 * Always read and write single clusters at a time -
1481 * we need to avoid requesting differently-sized
1482 * blocks at the same disk offsets to avoid
1483 * confusing the buffer cache.
1484 */
1485 tocopy = min(left, ntfs_cntob(1) - off);
1486 cl = ntfs_btocl(tocopy + off);
1487 KASSERT(cl == 1 && tocopy <= ntfs_cntob(1),
1488 ("single cluster limit mistake"));
1489 ddprintf(("ntfs_writentvattr_plain: write: " \
1490 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
1491 (u_int32_t) cn, (u_int32_t) cl,
1492 (u_int32_t) off, (u_int32_t) tocopy,
1493 (u_int32_t) left));
1494 if ((off == 0) && (tocopy == ntfs_cntob(cl)))
1495 {
1496 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn),
1497 ntfs_cntob(cl), 0, 0, 0);
1498 clrbuf(bp);
1499 } else {
1500 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
1501 ntfs_cntob(cl), NOCRED, &bp);
1502 if (error) {
1503 brelse(bp);
1504 return (error);
1505 }
1506 }
1507 if (uio)
1508 uiomove(bp->b_data + off, tocopy, uio);
1509 else
1510 memcpy(bp->b_data + off, data, tocopy);
1511 bawrite(bp);
1512 data = data + tocopy;
1513 *initp += tocopy;
1514 off = 0;
1515 left -= tocopy;
1516 cn += cl;
1517 ccl -= cl;
1518 }
1519 }
1520
1521 if (left) {
1522 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
1523 error = EINVAL;
1524 }
1525
1526 return (error);
1527 }
1528
1529 /*
1530 * This is one of read routines.
1531 *
1532 * ntnode should be locked.
1533 */
1534 int
1535 ntfs_readntvattr_plain(
1536 struct ntfsmount * ntmp,
1537 struct ntnode * ip,
1538 struct ntvattr * vap,
1539 off_t roff,
1540 size_t rsize,
1541 void *rdata,
1542 size_t * initp,
1543 struct uio *uio)
1544 {
1545 int error = 0;
1546 int off;
1547
1548 *initp = 0;
1549 if (vap->va_flag & NTFS_AF_INRUN) {
1550 int cnt;
1551 cn_t ccn, ccl, cn, left, cl;
1552 caddr_t data = rdata;
1553 struct buf *bp;
1554 size_t tocopy;
1555
1556 ddprintf(("ntfs_readntvattr_plain: data in run: %ld chains\n",
1557 vap->va_vruncnt));
1558
1559 off = roff;
1560 left = rsize;
1561 ccl = 0;
1562 ccn = 0;
1563 cnt = 0;
1564 while (left && (cnt < vap->va_vruncnt)) {
1565 ccn = vap->va_vruncn[cnt];
1566 ccl = vap->va_vruncl[cnt];
1567
1568 ddprintf(("ntfs_readntvattr_plain: " \
1569 "left %d, cn: 0x%x, cl: %d, off: %d\n", \
1570 (u_int32_t) left, (u_int32_t) ccn, \
1571 (u_int32_t) ccl, (u_int32_t) off));
1572
1573 if (ntfs_cntob(ccl) < off) {
1574 off -= ntfs_cntob(ccl);
1575 cnt++;
1576 continue;
1577 }
1578 if (ccn || ip->i_number == NTFS_BOOTINO) {
1579 ccl -= ntfs_btocn(off);
1580 cn = ccn + ntfs_btocn(off);
1581 off = ntfs_btocnoff(off);
1582
1583 while (left && ccl) {
1584 /*
1585 * Always read single clusters at a
1586 * time - we need to avoid reading
1587 * differently-sized blocks at the
1588 * same disk offsets to avoid
1589 * confusing the buffer cache.
1590 */
1591 tocopy = min(left,
1592 ntfs_cntob(1) - off);
1593 cl = ntfs_btocl(tocopy + off);
1594 KASSERT(cl == 1 &&
1595 tocopy <= ntfs_cntob(1),
1596 ("single cluster limit mistake"));
1597
1598 ddprintf(("ntfs_readntvattr_plain: " \
1599 "read: cn: 0x%x cl: %d, " \
1600 "off: %d len: %d, left: %d\n",
1601 (u_int32_t) cn,
1602 (u_int32_t) cl,
1603 (u_int32_t) off,
1604 (u_int32_t) tocopy,
1605 (u_int32_t) left));
1606 error = bread(ntmp->ntm_devvp,
1607 ntfs_cntobn(cn),
1608 ntfs_cntob(cl),
1609 NOCRED, &bp);
1610 if (error) {
1611 brelse(bp);
1612 return (error);
1613 }
1614 if (uio) {
1615 uiomove(bp->b_data + off,
1616 tocopy, uio);
1617 } else {
1618 memcpy(data, bp->b_data + off,
1619 tocopy);
1620 }
1621 brelse(bp);
1622 data = data + tocopy;
1623 *initp += tocopy;
1624 off = 0;
1625 left -= tocopy;
1626 cn += cl;
1627 ccl -= cl;
1628 }
1629 } else {
1630 tocopy = min(left, ntfs_cntob(ccl) - off);
1631 ddprintf(("ntfs_readntvattr_plain: "
1632 "hole: ccn: 0x%x ccl: %d, off: %d, " \
1633 " len: %d, left: %d\n",
1634 (u_int32_t) ccn, (u_int32_t) ccl,
1635 (u_int32_t) off, (u_int32_t) tocopy,
1636 (u_int32_t) left));
1637 left -= tocopy;
1638 off = 0;
1639 if (uio) {
1640 size_t remains = tocopy;
1641 for(; remains; remains--)
1642 uiomove("", 1, uio);
1643 } else
1644 bzero(data, tocopy);
1645 data = data + tocopy;
1646 }
1647 cnt++;
1648 }
1649 if (left) {
1650 printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
1651 error = E2BIG;
1652 }
1653 } else {
1654 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
1655 if (uio)
1656 uiomove(vap->va_datap + roff, rsize, uio);
1657 else
1658 memcpy(rdata, vap->va_datap + roff, rsize);
1659 *initp += rsize;
1660 }
1661
1662 return (error);
1663 }
1664
1665 /*
1666 * This is one of read routines.
1667 */
1668 int
1669 ntfs_readattr_plain(
1670 struct ntfsmount * ntmp,
1671 struct ntnode * ip,
1672 u_int32_t attrnum,
1673 char *attrname,
1674 off_t roff,
1675 size_t rsize,
1676 void *rdata,
1677 size_t * initp,
1678 struct uio *uio)
1679 {
1680 size_t init;
1681 int error = 0;
1682 off_t off = roff, left = rsize, toread;
1683 caddr_t data = rdata;
1684 struct ntvattr *vap;
1685 *initp = 0;
1686
1687 while (left) {
1688 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1689 ntfs_btocn(off), &vap);
1690 if (error)
1691 return (error);
1692 toread = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1693 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
1694 (u_int32_t) off, (u_int32_t) toread,
1695 (u_int32_t) vap->va_vcnstart,
1696 (u_int32_t) vap->va_vcnend));
1697 error = ntfs_readntvattr_plain(ntmp, ip, vap,
1698 off - ntfs_cntob(vap->va_vcnstart),
1699 toread, data, &init, uio);
1700 if (error) {
1701 printf("ntfs_readattr_plain: " \
1702 "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
1703 (u_int32_t) off, (u_int32_t) toread);
1704 printf("ntfs_readattr_plain: attrib: %d - %d\n",
1705 (u_int32_t) vap->va_vcnstart,
1706 (u_int32_t) vap->va_vcnend);
1707 ntfs_ntvattrrele(vap);
1708 break;
1709 }
1710 ntfs_ntvattrrele(vap);
1711 left -= toread;
1712 off += toread;
1713 data = data + toread;
1714 *initp += init;
1715 }
1716
1717 return (error);
1718 }
1719
1720 /*
1721 * This is one of read routines.
1722 */
1723 int
1724 ntfs_readattr(
1725 struct ntfsmount * ntmp,
1726 struct ntnode * ip,
1727 u_int32_t attrnum,
1728 char *attrname,
1729 off_t roff,
1730 size_t rsize,
1731 void *rdata,
1732 struct uio *uio)
1733 {
1734 int error = 0;
1735 struct ntvattr *vap;
1736 size_t init;
1737
1738 ddprintf(("ntfs_readattr: reading %d: 0x%x, from %d size %d bytes\n",
1739 ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
1740
1741 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
1742 if (error)
1743 return (error);
1744
1745 if ((roff > vap->va_datalen) ||
1746 (roff + rsize > vap->va_datalen)) {
1747 ddprintf(("ntfs_readattr: offset too big\n"));
1748 ntfs_ntvattrrele(vap);
1749 return (E2BIG);
1750 }
1751 if (vap->va_compression && vap->va_compressalg) {
1752 u_int8_t *cup;
1753 u_int8_t *uup;
1754 off_t off = roff, left = rsize, tocopy;
1755 caddr_t data = rdata;
1756 cn_t cn;
1757
1758 ddprintf(("ntfs_ntreadattr: compression: %d\n",
1759 vap->va_compressalg));
1760
1761 MALLOC(cup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
1762 M_NTFSDECOMP, M_WAITOK);
1763 MALLOC(uup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
1764 M_NTFSDECOMP, M_WAITOK);
1765
1766 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
1767 off = roff - ntfs_cntob(cn);
1768
1769 while (left) {
1770 error = ntfs_readattr_plain(ntmp, ip, attrnum,
1771 attrname, ntfs_cntob(cn),
1772 ntfs_cntob(NTFS_COMPUNIT_CL),
1773 cup, &init, NULL);
1774 if (error)
1775 break;
1776
1777 tocopy = min(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
1778
1779 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
1780 if (uio)
1781 uiomove(cup + off, tocopy, uio);
1782 else
1783 memcpy(data, cup + off, tocopy);
1784 } else if (init == 0) {
1785 if (uio) {
1786 size_t remains = tocopy;
1787 for(; remains; remains--)
1788 uiomove("", 1, uio);
1789 }
1790 else
1791 bzero(data, tocopy);
1792 } else {
1793 error = ntfs_uncompunit(ntmp, uup, cup);
1794 if (error)
1795 break;
1796 if (uio)
1797 uiomove(uup + off, tocopy, uio);
1798 else
1799 memcpy(data, uup + off, tocopy);
1800 }
1801
1802 left -= tocopy;
1803 data = data + tocopy;
1804 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
1805 cn += NTFS_COMPUNIT_CL;
1806 }
1807
1808 FREE(uup, M_NTFSDECOMP);
1809 FREE(cup, M_NTFSDECOMP);
1810 } else
1811 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
1812 roff, rsize, rdata, &init, uio);
1813 ntfs_ntvattrrele(vap);
1814 return (error);
1815 }
1816
1817 #if UNUSED_CODE
1818 int
1819 ntfs_parserun(
1820 cn_t * cn,
1821 cn_t * cl,
1822 u_int8_t * run,
1823 u_long len,
1824 u_long *off)
1825 {
1826 u_int8_t sz;
1827 int i;
1828
1829 if (NULL == run) {
1830 printf("ntfs_parsetun: run == NULL\n");
1831 return (EINVAL);
1832 }
1833 sz = run[(*off)++];
1834 if (0 == sz) {
1835 printf("ntfs_parserun: trying to go out of run\n");
1836 return (E2BIG);
1837 }
1838 *cl = 0;
1839 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1840 printf("ntfs_parserun: " \
1841 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1842 sz, len, *off);
1843 return (EINVAL);
1844 }
1845 for (i = 0; i < (sz & 0xF); i++)
1846 *cl += (u_int32_t) run[(*off)++] << (i << 3);
1847
1848 sz >>= 4;
1849 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1850 printf("ntfs_parserun: " \
1851 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1852 sz, len, *off);
1853 return (EINVAL);
1854 }
1855 for (i = 0; i < (sz & 0xF); i++)
1856 *cn += (u_int32_t) run[(*off)++] << (i << 3);
1857
1858 return (0);
1859 }
1860 #endif
1861
1862 /*
1863 * Process fixup routine on given buffer.
1864 */
1865 int
1866 ntfs_procfixups(
1867 struct ntfsmount * ntmp,
1868 u_int32_t magic,
1869 caddr_t buf,
1870 size_t len)
1871 {
1872 struct fixuphdr *fhp = (struct fixuphdr *) buf;
1873 int i;
1874 u_int16_t fixup;
1875 u_int16_t *fxp;
1876 u_int16_t *cfxp;
1877
1878 if (fhp->fh_magic != magic) {
1879 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
1880 fhp->fh_magic, magic);
1881 return (EINVAL);
1882 }
1883 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
1884 printf("ntfs_procfixups: " \
1885 "bad fixups number: %d for %ld bytes block\n",
1886 fhp->fh_fnum, (long)len); /* XXX printf kludge */
1887 return (EINVAL);
1888 }
1889 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
1890 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
1891 return (EINVAL);
1892 }
1893 fxp = (u_int16_t *) (buf + fhp->fh_foff);
1894 cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
1895 fixup = *fxp++;
1896 for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
1897 if (*cfxp != fixup) {
1898 printf("ntfs_procfixups: fixup %d doesn't match\n", i);
1899 return (EINVAL);
1900 }
1901 *cfxp = *fxp;
1902 cfxp = (u_int16_t *) ((caddr_t) cfxp + ntmp->ntm_bps);
1903 }
1904 return (0);
1905 }
1906
1907 #if UNUSED_CODE
1908 int
1909 ntfs_runtocn(
1910 cn_t * cn,
1911 struct ntfsmount * ntmp,
1912 u_int8_t * run,
1913 u_long len,
1914 cn_t vcn)
1915 {
1916 cn_t ccn = 0;
1917 cn_t ccl = 0;
1918 u_long off = 0;
1919 int error = 0;
1920
1921 #if NTFS_DEBUG
1922 int i;
1923 printf("ntfs_runtocn: run: 0x%p, %ld bytes, vcn:%ld\n",
1924 run, len, (u_long) vcn);
1925 printf("ntfs_runtocn: run: ");
1926 for (i = 0; i < len; i++)
1927 printf("0x%02x ", run[i]);
1928 printf("\n");
1929 #endif
1930
1931 if (NULL == run) {
1932 printf("ntfs_runtocn: run == NULL\n");
1933 return (EINVAL);
1934 }
1935 do {
1936 if (run[off] == 0) {
1937 printf("ntfs_runtocn: vcn too big\n");
1938 return (E2BIG);
1939 }
1940 vcn -= ccl;
1941 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
1942 if (error) {
1943 printf("ntfs_runtocn: ntfs_parserun failed\n");
1944 return (error);
1945 }
1946 } while (ccl <= vcn);
1947 *cn = ccn + vcn;
1948 return (0);
1949 }
1950 #endif
1951
1952 /*
1953 * this initializes toupper table & dependant variables to be ready for
1954 * later work
1955 */
1956 void
1957 ntfs_toupper_init()
1958 {
1959 ntfs_toupper_tab = (wchar *) NULL;
1960 lockinit(&ntfs_toupper_lock, PVFS, "ntfs_toupper", 0, 0);
1961 ntfs_toupper_usecount = 0;
1962 }
1963
1964 void
1965 ntfs_toupper_destroy(void)
1966 {
1967
1968 lockdestroy(&ntfs_toupper_lock);
1969 }
1970
1971 /*
1972 * if the ntfs_toupper_tab[] is filled already, just raise use count;
1973 * otherwise read the data from the filesystem we are currently mounting
1974 */
1975 int
1976 ntfs_toupper_use(mp, ntmp)
1977 struct mount *mp;
1978 struct ntfsmount *ntmp;
1979 {
1980 int error = 0;
1981 struct vnode *vp;
1982
1983 /* get exclusive access */
1984 lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL, NULL);
1985
1986 /* only read the translation data from a file if it hasn't been
1987 * read already */
1988 if (ntfs_toupper_tab)
1989 goto out;
1990
1991 /*
1992 * Read in Unicode lowercase -> uppercase translation file.
1993 * XXX for now, just the first 256 entries are used anyway,
1994 * so don't bother reading more
1995 */
1996 MALLOC(ntfs_toupper_tab, wchar *, 65536 * sizeof(wchar),
1997 M_NTFSRDATA, M_WAITOK);
1998
1999 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, LK_EXCLUSIVE, &vp)))
2000 goto out;
2001 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
2002 0, 65536*sizeof(wchar), (char *) ntfs_toupper_tab, NULL);
2003 vput(vp);
2004
2005 out:
2006 ntfs_toupper_usecount++;
2007 lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL, NULL);
2008 return (error);
2009 }
2010
2011 /*
2012 * lower the use count and if it reaches zero, free the memory
2013 * tied by toupper table
2014 */
2015 void
2016 ntfs_toupper_unuse()
2017 {
2018 /* get exclusive access */
2019 lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL, NULL);
2020
2021 ntfs_toupper_usecount--;
2022 if (ntfs_toupper_usecount == 0) {
2023 FREE(ntfs_toupper_tab, M_NTFSRDATA);
2024 ntfs_toupper_tab = NULL;
2025 }
2026 #ifdef DIAGNOSTIC
2027 else if (ntfs_toupper_usecount < 0) {
2028 panic("ntfs_toupper_unuse(): use count negative: %d\n",
2029 ntfs_toupper_usecount);
2030 }
2031 #endif
2032
2033 /* release the lock */
2034 lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL, NULL);
2035 }
2036
2037 int
2038 ntfs_u28_init(
2039 struct ntfsmount *ntmp,
2040 wchar *u2w,
2041 char *cs_local,
2042 char *cs_ntfs)
2043 {
2044 char ** u28;
2045 int i, j, h, l;
2046
2047 if (ntfs_iconv && cs_local) {
2048 ntfs_iconv->open(cs_local, cs_ntfs, &ntmp->ntm_ic_u2l);
2049 return (0);
2050 }
2051
2052 MALLOC(u28, char **, 256 * sizeof(char*), M_TEMP, M_WAITOK | M_ZERO);
2053
2054 for (i=0; i<256; i++) {
2055 h = (u2w[i] >> 8) & 0xFF;
2056 l = (u2w[i]) &0xFF;
2057
2058 if (u28[h] == NULL) {
2059 MALLOC(u28[h], char *, 256 * sizeof(char), M_TEMP, M_WAITOK);
2060 for (j=0; j<256; j++)
2061 u28[h][j] = '_';
2062 }
2063
2064 u28[h][l] = i & 0xFF;
2065 }
2066
2067 ntmp->ntm_u28 = u28;
2068
2069 return (0);
2070 }
2071
2072 int
2073 ntfs_u28_uninit(struct ntfsmount *ntmp)
2074 {
2075 char ** u28;
2076 int i;
2077
2078 if (ntmp->ntm_u28 == NULL) {
2079 if (ntfs_iconv && ntmp->ntm_ic_u2l) {
2080 ntfs_iconv->close(ntmp->ntm_ic_u2l);
2081 }
2082 return (0);
2083 }
2084
2085 u28 = ntmp->ntm_u28;
2086
2087 for (i=0; i<256; i++)
2088 if (u28[i] != NULL)
2089 FREE(u28[i], M_TEMP);
2090
2091 FREE(u28, M_TEMP);
2092
2093 return (0);
2094 }
2095
2096 int
2097 ntfs_82u_init(
2098 struct ntfsmount *ntmp,
2099 char *cs_local,
2100 char *cs_ntfs)
2101 {
2102 wchar * _82u;
2103 int i;
2104
2105 if (ntfs_iconv && cs_local) {
2106 ntfs_iconv->open(cs_ntfs, cs_local, &ntmp->ntm_ic_l2u);
2107 return (0);
2108 }
2109
2110 MALLOC(_82u, wchar *, 256 * sizeof(wchar), M_TEMP, M_WAITOK);
2111
2112 for (i=0; i<256; i++)
2113 _82u[i] = i;
2114
2115 ntmp->ntm_82u = _82u;
2116
2117 return (0);
2118 }
2119
2120 int
2121 ntfs_82u_uninit(struct ntfsmount *ntmp)
2122 {
2123
2124 if (ntmp->ntm_82u == NULL) {
2125 if (ntfs_iconv && ntmp->ntm_ic_l2u) {
2126 ntfs_iconv->close(ntmp->ntm_ic_l2u);
2127 }
2128 return (0);
2129 }
2130
2131 FREE(ntmp->ntm_82u, M_TEMP);
2132 return (0);
2133 }
2134
2135 /*
2136 * maps the Unicode char to 8bit equivalent
2137 * XXX currently only gets lower 8bit from the Unicode char
2138 * and substitutes a '_' for it if the result would be '\0';
2139 * something better has to be definitely though out
2140 */
2141 wchar
2142 ntfs_u28(
2143 struct ntfsmount *ntmp,
2144 wchar wc)
2145 {
2146 char *p, *outp, inbuf[3], outbuf[3];
2147 size_t ilen, olen;
2148
2149 if (ntfs_iconv && ntmp->ntm_ic_u2l) {
2150 ilen = olen = 2;
2151
2152 inbuf[0] = (char)(wc>>8);
2153 inbuf[1] = (char)wc;
2154 inbuf[2] = '\0';
2155 p = inbuf;
2156 outp = outbuf;
2157 ntfs_iconv->convchr(ntmp->ntm_ic_u2l, (const char **)&p, &ilen,
2158 &outp, &olen);
2159 if (olen == 1) {
2160 return ((wchar)(outbuf[0]&0xFF));
2161 } else if (olen == 0) {
2162 return ((wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF)));
2163 }
2164 return ('?');
2165 }
2166
2167 p = ntmp->ntm_u28[(wc>>8)&0xFF];
2168 if (p == NULL)
2169 return ('_');
2170 return (p[wc&0xFF]&0xFF);
2171 }
2172
2173 wchar
2174 ntfs_82u(
2175 struct ntfsmount *ntmp,
2176 wchar wc,
2177 int *len)
2178 {
2179 char *p, *outp, inbuf[3], outbuf[3];
2180 wchar uc;
2181 size_t ilen, olen;
2182
2183 if (ntfs_iconv && ntmp->ntm_ic_l2u) {
2184 ilen = (size_t)*len;
2185 olen = 2;
2186
2187 inbuf[0] = (char)(wc>>8);
2188 inbuf[1] = (char)wc;
2189 inbuf[2] = '\0';
2190 p = inbuf;
2191 outp = outbuf;
2192 ntfs_iconv->convchr(ntmp->ntm_ic_l2u, (const char **)&p, &ilen,
2193 &outp, &olen);
2194 *len -= (int)ilen;
2195 uc = (wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF));
2196
2197 return (uc);
2198 }
2199
2200 if (ntmp->ntm_82u != NULL)
2201 return (ntmp->ntm_82u[wc&0xFF]);
2202
2203 return ('?');
2204 }
2205
Cache object: 36c3ab476e9a11ab48cd1000b5b9ab97
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