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Fix LINT kernel; spin_lock function definitions have been split into
[dragonfly/port-amd64.git] / sys / vfs / ntfs / ntfs_subr.c
bloba0dabc4241c6fbbba6839a1dd7566940095428e0
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: src/sys/ntfs/ntfs_subr.c,v 1.7.2.4 2001/10/12 22:08:49 semenu Exp $
29 * $DragonFly: src/sys/vfs/ntfs/ntfs_subr.c,v 1.17 2005/11/24 02:16:17 y0netan1 Exp $
30 */
31
32 #include <sys/param.h>
33 #include <sys/types.h>
34 #include <sys/systm.h>
35 #include <sys/proc.h>
36 #include <sys/namei.h>
37 #include <sys/kernel.h>
38 #include <sys/vnode.h>
39 #include <sys/mount.h>
40 #include <sys/buf.h>
41 #include <sys/file.h>
42 #include <sys/malloc.h>
43 #include <sys/lock.h>
44 #include <sys/spinlock.h>
45 #include <sys/spinlock2.h>
46
47 #include <machine/inttypes.h>
48
49 #if defined(__NetBSD__)
50 #include <miscfs/specfs/specdev.h>
51 #endif
52
53 /* #define NTFS_DEBUG 1 */
54 #include "ntfs.h"
55 #include "ntfsmount.h"
56 #include "ntfs_inode.h"
57 #include "ntfs_vfsops.h"
58 #include "ntfs_subr.h"
59 #include "ntfs_compr.h"
60 #include "ntfs_ihash.h"
61
62 #if defined(__DragonFly__)
63 MALLOC_DEFINE(M_NTFSNTVATTR, "NTFS vattr", "NTFS file attribute information");
64 MALLOC_DEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
65 MALLOC_DEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
66 MALLOC_DEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
67 #endif
68
69 static int ntfs_ntlookupattr (struct ntfsmount *, const char *, int, int *, char **);
70 static int ntfs_findvattr (struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t);
71 static int ntfs_uastricmp (struct ntfsmount *, const wchar *, size_t, const char *, size_t);
72 static int ntfs_uastrcmp (struct ntfsmount *, const wchar *, size_t, const char *, size_t);
73
74 /* table for mapping Unicode chars into uppercase; it's filled upon first
75 * ntfs mount, freed upon last ntfs umount */
76 static wchar *ntfs_toupper_tab;
77 #define NTFS_TOUPPER(ch) (ntfs_toupper_tab[(ch)])
78 static struct lock ntfs_toupper_lock;
79 static signed int ntfs_toupper_usecount;
80
81 /* support macro for ntfs_ntvattrget() */
82 #define NTFS_AALPCMP(aalp,type,name,namelen) ( \
83 (aalp->al_type == type) && (aalp->al_namelen == namelen) && \
84 !NTFS_UASTRCMP(aalp->al_name,aalp->al_namelen,name,namelen) )
85
86 /*
87 *
88 */
89 int
90 ntfs_ntvattrrele(struct ntvattr *vap)
91 {
92 dprintf(("ntfs_ntvattrrele: ino: %"PRId64", type: 0x%x\n",
93 vap->va_ip->i_number, vap->va_type));
94
95 ntfs_ntrele(vap->va_ip);
96
97 return (0);
98 }
99
100 /*
101 * find the attribute in the ntnode
102 */
103 static int
104 ntfs_findvattr(struct ntfsmount *ntmp, struct ntnode *ip,
105 struct ntvattr **lvapp, struct ntvattr **vapp, u_int32_t type,
106 const char *name, size_t namelen, cn_t vcn)
107 {
108 int error;
109 struct ntvattr *vap;
110
111 if((ip->i_flag & IN_LOADED) == 0) {
112 dprintf(("ntfs_findvattr: node not loaded, ino: %"PRId64"\n",
113 ip->i_number));
114 error = ntfs_loadntnode(ntmp,ip);
115 if (error) {
116 printf("ntfs_findvattr: FAILED TO LOAD INO: %"PRId64"\n",
117 ip->i_number);
118 return (error);
119 }
120 }
121
122 *lvapp = NULL;
123 *vapp = NULL;
124 for (vap = ip->i_valist.lh_first; vap; vap = vap->va_list.le_next) {
125 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %d - %d\n", \
126 vap->va_type, (u_int32_t) vap->va_vcnstart, \
127 (u_int32_t) vap->va_vcnend));
128 if ((vap->va_type == type) &&
129 (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
130 (vap->va_namelen == namelen) &&
131 (strncmp(name, vap->va_name, namelen) == 0)) {
132 *vapp = vap;
133 ntfs_ntref(vap->va_ip);
134 return (0);
135 }
136 if (vap->va_type == NTFS_A_ATTRLIST)
137 *lvapp = vap;
138 }
139
140 return (-1);
141 }
142
143 /*
144 * Search attribute specifed in ntnode (load ntnode if nessecary).
145 * If not found but ATTR_A_ATTRLIST present, read it in and search throught.
146 * VOP_VGET node needed, and lookup througth it's ntnode (load if nessesary).
147 *
148 * ntnode should be locked
149 */
150 int
151 ntfs_ntvattrget(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t type,
152 const char *name, cn_t vcn, struct ntvattr **vapp)
153 {
154 struct ntvattr *lvap = NULL;
155 struct attr_attrlist *aalp;
156 struct attr_attrlist *nextaalp;
157 struct vnode *newvp;
158 struct ntnode *newip;
159 caddr_t alpool;
160 size_t namelen, len;
161 int error;
162
163 *vapp = NULL;
164
165 if (name) {
166 dprintf(("ntfs_ntvattrget: " \
167 "ino: %"PRId64", type: 0x%x, name: %s, vcn: %d\n", \
168 ip->i_number, type, name, (u_int32_t) vcn));
169 namelen = strlen(name);
170 } else {
171 dprintf(("ntfs_ntvattrget: " \
172 "ino: %"PRId64", type: 0x%x, vcn: %d\n", \
173 ip->i_number, type, (u_int32_t) vcn));
174 name = "";
175 namelen = 0;
176 }
177
178 error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
179 if (error >= 0)
180 return (error);
181
182 if (!lvap) {
183 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
184 "ino: %"PRId64", type: 0x%x, name: %s, vcn: %d\n", \
185 ip->i_number, type, name, (u_int32_t) vcn));
186 return (ENOENT);
187 }
188 /* Scan $ATTRIBUTE_LIST for requested attribute */
189 len = lvap->va_datalen;
190 MALLOC(alpool, caddr_t, len, M_TEMP, M_WAITOK);
191 error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
192 NULL);
193 if (error)
194 goto out;
195
196 aalp = (struct attr_attrlist *) alpool;
197 nextaalp = NULL;
198
199 for(; len > 0; aalp = nextaalp) {
200 dprintf(("ntfs_ntvattrget: " \
201 "attrlist: ino: %d, attr: 0x%x, vcn: %d\n", \
202 aalp->al_inumber, aalp->al_type, \
203 (u_int32_t) aalp->al_vcnstart));
204
205 if (len > aalp->reclen) {
206 nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
207 } else {
208 nextaalp = NULL;
209 }
210 len -= aalp->reclen;
211
212 if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
213 (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
214 NTFS_AALPCMP(nextaalp, type, name, namelen)))
215 continue;
216
217 dprintf(("ntfs_ntvattrget: attribute in ino: %d\n",
218 aalp->al_inumber));
219
220 /* this is not a main record, so we can't use just plain
221 vget() */
222 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
223 NTFS_A_DATA, NULL, LK_EXCLUSIVE,
224 VG_EXT, curthread, &newvp);
225 if (error) {
226 printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
227 aalp->al_inumber);
228 goto out;
229 }
230 newip = VTONT(newvp);
231 /* XXX have to lock ntnode */
232 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
233 type, name, namelen, vcn);
234 vput(newvp);
235 if (error == 0)
236 goto out;
237 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
238 break;
239 }
240 error = ENOENT;
241
242 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
243 "ino: %"PRId64", type: 0x%x, name: %.*s, vcn: %d\n", \
244 ip->i_number, type, (int) namelen, name, (u_int32_t) vcn));
245 out:
246 FREE(alpool, M_TEMP);
247 return (error);
248 }
249
250 /*
251 * Read ntnode from disk, make ntvattr list.
252 *
253 * ntnode should be locked
254 */
255 int
256 ntfs_loadntnode(struct ntfsmount *ntmp, struct ntnode *ip)
257 {
258 struct filerec *mfrp;
259 daddr_t bn;
260 int error,off;
261 struct attr *ap;
262 struct ntvattr *nvap;
263
264 dprintf(("ntfs_loadntnode: loading ino: %"PRId64"\n",ip->i_number));
265
266 MALLOC(mfrp, struct filerec *, ntfs_bntob(ntmp->ntm_bpmftrec),
267 M_TEMP, M_WAITOK);
268
269 if (ip->i_number < NTFS_SYSNODESNUM) {
270 struct buf *bp;
271
272 dprintf(("ntfs_loadntnode: read system node\n"));
273
274 bn = ntfs_cntobn(ntmp->ntm_mftcn) +
275 ntmp->ntm_bpmftrec * ip->i_number;
276
277 error = bread(ntmp->ntm_devvp,
278 bn, ntfs_bntob(ntmp->ntm_bpmftrec), &bp);
279 if (error) {
280 printf("ntfs_loadntnode: BREAD FAILED\n");
281 brelse(bp);
282 goto out;
283 }
284 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
285 bqrelse(bp);
286 } else {
287 struct vnode *vp;
288
289 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
290 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
291 ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
292 ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
293 if (error) {
294 printf("ntfs_loadntnode: ntfs_readattr failed\n");
295 goto out;
296 }
297 }
298
299 /* Check if magic and fixups are correct */
300 error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp,
301 ntfs_bntob(ntmp->ntm_bpmftrec));
302 if (error) {
303 printf("ntfs_loadntnode: BAD MFT RECORD %"PRId64"\n",
304 ip->i_number);
305 goto out;
306 }
307
308 dprintf(("ntfs_loadntnode: load attrs for ino: %"PRId64"\n",ip->i_number));
309 off = mfrp->fr_attroff;
310 ap = (struct attr *) ((caddr_t)mfrp + off);
311
312 LIST_INIT(&ip->i_valist);
313
314 while (ap->a_hdr.a_type != -1) {
315 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
316 if (error)
317 break;
318 nvap->va_ip = ip;
319
320 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
321
322 off += ap->a_hdr.reclen;
323 ap = (struct attr *) ((caddr_t)mfrp + off);
324 }
325 if (error) {
326 printf("ntfs_loadntnode: failed to load attr ino: %"PRId64"\n",
327 ip->i_number);
328 goto out;
329 }
330
331 ip->i_mainrec = mfrp->fr_mainrec;
332 ip->i_nlink = mfrp->fr_nlink;
333 ip->i_frflag = mfrp->fr_flags;
334
335 ip->i_flag |= IN_LOADED;
336
337 out:
338 FREE(mfrp, M_TEMP);
339 return (error);
340 }
341
342 /*
343 * Routine locks ntnode and increase usecount, just opposite of
344 * ntfs_ntput().
345 */
346 int
347 ntfs_ntget(struct ntnode *ip)
348 {
349 lwkt_tokref ilock;
350
351 dprintf(("ntfs_ntget: get ntnode %"PRId64": %p, usecount: %d\n",
352 ip->i_number, ip, ip->i_usecount));
353
354 ip->i_usecount++; /* ZZZ */
355 LOCKMGR(&ip->i_lock, LK_EXCLUSIVE, NULL);
356
357 return 0;
358 }
359
360 /*
361 * Routine search ntnode in hash, if found: lock, inc usecount and return.
362 * If not in hash allocate structure for ntnode, prefill it, lock,
363 * inc count and return.
364 *
365 * ntnode returned locked
366 */
367 int
368 ntfs_ntlookup(struct ntfsmount *ntmp, ino_t ino, struct ntnode **ipp)
369 {
370 struct ntnode *ip;
371
372 dprintf(("ntfs_ntlookup: looking for ntnode %d\n", ino));
373
374 do {
375 if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
376 ntfs_ntget(ip);
377 dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
378 ino, ip, ip->i_usecount));
379 *ipp = ip;
380 return (0);
381 }
382 } while (LOCKMGR(&ntfs_hashlock, LK_EXCLUSIVE | LK_SLEEPFAIL, NULL));
383
384 MALLOC(ip, struct ntnode *, sizeof(struct ntnode),
385 M_NTFSNTNODE, M_WAITOK);
386 ddprintf(("ntfs_ntlookup: allocating ntnode: %d: %p\n", ino, ip));
387 bzero((caddr_t) ip, sizeof(struct ntnode));
388
389 /* Generic initialization */
390 ip->i_devvp = ntmp->ntm_devvp;
391 ip->i_dev = ntmp->ntm_dev;
392 ip->i_number = ino;
393 ip->i_mp = ntmp;
394
395 LIST_INIT(&ip->i_fnlist);
396 vref(ip->i_devvp);
397
398 /* init lock and lock the newborn ntnode */
399 lockinit(&ip->i_lock, 0, "ntnode", 0, LK_EXCLUSIVE);
400 spin_init(&ip->i_interlock);
401 ntfs_ntget(ip);
402
403 ntfs_nthashins(ip);
404
405 LOCKMGR(&ntfs_hashlock, LK_RELEASE, NULL);
406
407 *ipp = ip;
408
409 dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
410 ino, ip, ip->i_usecount));
411
412 return (0);
413 }
414
415 /*
416 * Decrement usecount of ntnode and unlock it, if usecount reach zero,
417 * deallocate ntnode.
418 *
419 * ntnode should be locked on entry, and unlocked on return.
420 */
421 void
422 ntfs_ntput(struct ntnode *ip)
423 {
424 struct ntvattr *vap;
425
426 dprintf(("ntfs_ntput: rele ntnode %"PRId64": %p, usecount: %d\n",
427 ip->i_number, ip, ip->i_usecount));
428
429 spin_lock(&ip->i_interlock);
430 ip->i_usecount--;
431
432 #ifdef DIAGNOSTIC
433 if (ip->i_usecount < 0) {
434 spin_unlock(&ip->i_interlock);
435 panic("ntfs_ntput: ino: %"PRId64" usecount: %d \n",
436 ip->i_number,ip->i_usecount);
437 }
438 #endif
439
440 if (ip->i_usecount > 0) {
441 LOCKMGR(&ip->i_lock, LK_RELEASE|LK_INTERLOCK, &ip->i_interlock);
442 return;
443 }
444
445 dprintf(("ntfs_ntput: deallocating ntnode: %"PRId64"\n", ip->i_number));
446
447 if (ip->i_fnlist.lh_first) {
448 spin_unlock(&ip->i_interlock);
449 panic("ntfs_ntput: ntnode has fnodes\n");
450 }
451
452 /*
453 * XXX this is a bit iffy because we are making high level calls
454 * while holding a spinlock.
455 */
456 ntfs_nthashrem(ip);
457
458 while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) {
459 LIST_REMOVE(vap,va_list);
460 ntfs_freentvattr(vap);
461 }
462 spin_unlock(&ip->i_interlock);
463 vrele(ip->i_devvp);
464 FREE(ip, M_NTFSNTNODE);
465 }
466
467 /*
468 * increment usecount of ntnode
469 */
470 void
471 ntfs_ntref(struct ntnode *ip)
472 {
473 ip->i_usecount++;
474
475 dprintf(("ntfs_ntref: ino %"PRId64", usecount: %d\n",
476 ip->i_number, ip->i_usecount));
477
478 }
479
480 /*
481 * Decrement usecount of ntnode.
482 */
483 void
484 ntfs_ntrele(struct ntnode *ip)
485 {
486 lwkt_tokref ilock;
487
488 dprintf(("ntfs_ntrele: rele ntnode %"PRId64": %p, usecount: %d\n",
489 ip->i_number, ip, ip->i_usecount));
490
491 spin_lock(&ip->i_interlock);
492 ip->i_usecount--;
493
494 if (ip->i_usecount < 0) {
495 spin_unlock(&ip->i_interlock);
496 panic("ntfs_ntrele: ino: %"PRId64" usecount: %d \n",
497 ip->i_number,ip->i_usecount);
498 }
499 spin_unlock(&ip->i_interlock);
500 }
501
502 /*
503 * Deallocate all memory allocated for ntvattr
504 */
505 void
506 ntfs_freentvattr(struct ntvattr *vap)
507 {
508 if (vap->va_flag & NTFS_AF_INRUN) {
509 if (vap->va_vruncn)
510 FREE(vap->va_vruncn, M_NTFSRUN);
511 if (vap->va_vruncl)
512 FREE(vap->va_vruncl, M_NTFSRUN);
513 } else {
514 if (vap->va_datap)
515 FREE(vap->va_datap, M_NTFSRDATA);
516 }
517 FREE(vap, M_NTFSNTVATTR);
518 }
519
520 /*
521 * Convert disk image of attribute into ntvattr structure,
522 * runs are expanded also.
523 */
524 int
525 ntfs_attrtontvattr(struct ntfsmount *ntmp, struct ntvattr **rvapp,
526 struct attr *rap)
527 {
528 int error, i;
529 struct ntvattr *vap;
530
531 error = 0;
532 *rvapp = NULL;
533
534 MALLOC(vap, struct ntvattr *, sizeof(struct ntvattr),
535 M_NTFSNTVATTR, M_WAITOK);
536 bzero(vap, sizeof(struct ntvattr));
537 vap->va_ip = NULL;
538 vap->va_flag = rap->a_hdr.a_flag;
539 vap->va_type = rap->a_hdr.a_type;
540 vap->va_compression = rap->a_hdr.a_compression;
541 vap->va_index = rap->a_hdr.a_index;
542
543 ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
544
545 vap->va_namelen = rap->a_hdr.a_namelen;
546 if (rap->a_hdr.a_namelen) {
547 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
548 ddprintf((", name:["));
549 for (i = 0; i < vap->va_namelen; i++) {
550 vap->va_name[i] = unp[i];
551 ddprintf(("%c", vap->va_name[i]));
552 }
553 ddprintf(("]"));
554 }
555 if (vap->va_flag & NTFS_AF_INRUN) {
556 ddprintf((", nonres."));
557 vap->va_datalen = rap->a_nr.a_datalen;
558 vap->va_allocated = rap->a_nr.a_allocated;
559 vap->va_vcnstart = rap->a_nr.a_vcnstart;
560 vap->va_vcnend = rap->a_nr.a_vcnend;
561 vap->va_compressalg = rap->a_nr.a_compressalg;
562 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
563 &(vap->va_vruncnt),
564 (caddr_t) rap + rap->a_nr.a_dataoff);
565 } else {
566 vap->va_compressalg = 0;
567 ddprintf((", res."));
568 vap->va_datalen = rap->a_r.a_datalen;
569 vap->va_allocated = rap->a_r.a_datalen;
570 vap->va_vcnstart = 0;
571 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
572 MALLOC(vap->va_datap, caddr_t, vap->va_datalen,
573 M_NTFSRDATA, M_WAITOK);
574 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
575 rap->a_r.a_datalen);
576 }
577 ddprintf((", len: %d", vap->va_datalen));
578
579 if (error)
580 FREE(vap, M_NTFSNTVATTR);
581 else
582 *rvapp = vap;
583
584 ddprintf(("\n"));
585
586 return (error);
587 }
588
589 /*
590 * Expand run into more utilizable and more memory eating format.
591 */
592 int
593 ntfs_runtovrun(cn_t **rcnp, cn_t **rclp, u_long *rcntp, u_int8_t *run)
594 {
595 u_int32_t off;
596 u_int32_t sz, i;
597 cn_t *cn;
598 cn_t *cl;
599 u_long cnt;
600 cn_t prev;
601 cn_t tmp;
602
603 off = 0;
604 cnt = 0;
605 i = 0;
606 while (run[off]) {
607 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
608 cnt++;
609 }
610 MALLOC(cn, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
611 MALLOC(cl, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
612
613 off = 0;
614 cnt = 0;
615 prev = 0;
616 while (run[off]) {
617
618 sz = run[off++];
619 cl[cnt] = 0;
620
621 for (i = 0; i < (sz & 0xF); i++)
622 cl[cnt] += (u_int32_t) run[off++] << (i << 3);
623
624 sz >>= 4;
625 if (run[off + sz - 1] & 0x80) {
626 tmp = ((u_int64_t) - 1) << (sz << 3);
627 for (i = 0; i < sz; i++)
628 tmp |= (u_int64_t) run[off++] << (i << 3);
629 } else {
630 tmp = 0;
631 for (i = 0; i < sz; i++)
632 tmp |= (u_int64_t) run[off++] << (i << 3);
633 }
634 if (tmp)
635 prev = cn[cnt] = prev + tmp;
636 else
637 cn[cnt] = tmp;
638
639 cnt++;
640 }
641 *rcnp = cn;
642 *rclp = cl;
643 *rcntp = cnt;
644 return (0);
645 }
646
647 /*
648 * Compare unicode and ascii string case insens.
649 */
650 static int
651 ntfs_uastricmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
652 const char *astr, size_t astrlen)
653 {
654 size_t i;
655 int res;
656
657 /*
658 * XXX We use NTFS_82U(NTFS_U28(c)) to get rid of unicode
659 * symbols not covered by translation table
660 */
661 for (i = 0; i < ustrlen && i < astrlen; i++) {
662 res = ((int) NTFS_TOUPPER(NTFS_82U(NTFS_U28(ustr[i])))) -
663 ((int)NTFS_TOUPPER(NTFS_82U(astr[i])));
664 if (res)
665 return res;
666 }
667 return (ustrlen - astrlen);
668 }
669
670 /*
671 * Compare unicode and ascii string case sens.
672 */
673 static int
674 ntfs_uastrcmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
675 const char *astr, size_t astrlen)
676 {
677 size_t i;
678 int res;
679
680 for (i = 0; (i < ustrlen) && (i < astrlen); i++) {
681 res = (int) (((char)NTFS_U28(ustr[i])) - astr[i]);
682 if (res)
683 return res;
684 }
685 return (ustrlen - astrlen);
686 }
687
688 /*
689 * Search fnode in ntnode, if not found allocate and preinitialize.
690 *
691 * ntnode should be locked on entry.
692 */
693 int
694 ntfs_fget(struct ntfsmount *ntmp, struct ntnode *ip, int attrtype,
695 char *attrname, struct fnode **fpp)
696 {
697 struct fnode *fp;
698
699 dprintf(("ntfs_fget: ino: %"PRId64", attrtype: 0x%x, attrname: %s\n",
700 ip->i_number,attrtype, attrname?attrname:""));
701 *fpp = NULL;
702 for (fp = ip->i_fnlist.lh_first; fp != NULL; fp = fp->f_fnlist.le_next){
703 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
704 fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
705
706 if ((attrtype == fp->f_attrtype) &&
707 ((!attrname && !fp->f_attrname) ||
708 (attrname && fp->f_attrname &&
709 !strcmp(attrname,fp->f_attrname)))){
710 dprintf(("ntfs_fget: found existed: %p\n",fp));
711 *fpp = fp;
712 }
713 }
714
715 if (*fpp)
716 return (0);
717
718 MALLOC(fp, struct fnode *, sizeof(struct fnode), M_NTFSFNODE, M_WAITOK);
719 bzero(fp, sizeof(struct fnode));
720 dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
721
722 fp->f_ip = ip;
723 if (attrname) {
724 fp->f_flag |= FN_AATTRNAME;
725 MALLOC(fp->f_attrname, char *, strlen(attrname)+1, M_TEMP, M_WAITOK);
726 strcpy(fp->f_attrname, attrname);
727 } else
728 fp->f_attrname = NULL;
729 fp->f_attrtype = attrtype;
730
731 ntfs_ntref(ip);
732
733 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
734
735 *fpp = fp;
736
737 return (0);
738 }
739
740 /*
741 * Deallocate fnode, remove it from ntnode's fnode list.
742 *
743 * ntnode should be locked.
744 */
745 void
746 ntfs_frele(struct fnode *fp)
747 {
748 struct ntnode *ip = FTONT(fp);
749
750 dprintf(("ntfs_frele: fnode: %p for %"PRId64": %p\n", fp, ip->i_number, ip));
751
752 dprintf(("ntfs_frele: deallocating fnode\n"));
753 LIST_REMOVE(fp,f_fnlist);
754 if (fp->f_flag & FN_AATTRNAME)
755 FREE(fp->f_attrname, M_TEMP);
756 if (fp->f_dirblbuf)
757 FREE(fp->f_dirblbuf, M_NTFSDIR);
758 FREE(fp, M_NTFSFNODE);
759 ntfs_ntrele(ip);
760 }
761
762 /*
763 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME],
764 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
765 * If $ATTR_TYPE nott specifed, ATTR_A_DATA assumed.
766 */
767 static int
768 ntfs_ntlookupattr(struct ntfsmount *ntmp, const char *name, int namelen,
769 int *attrtype, char **attrname)
770 {
771 const char *sys;
772 size_t syslen, i;
773 struct ntvattrdef *adp;
774
775 if (namelen == 0)
776 return (0);
777
778 if (name[0] == '$') {
779 sys = name;
780 for (syslen = 0; syslen < namelen; syslen++) {
781 if(sys[syslen] == ':') {
782 name++;
783 namelen--;
784 break;
785 }
786 }
787 name += syslen;
788 namelen -= syslen;
789
790 adp = ntmp->ntm_ad;
791 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
792 if (syslen != adp->ad_namelen ||
793 strncmp(sys, adp->ad_name, syslen) != 0)
794 continue;
795
796 *attrtype = adp->ad_type;
797 goto out;
798 }
799 return (ENOENT);
800 } else
801 *attrtype = NTFS_A_DATA;
802
803 out:
804 if (namelen) {
805 MALLOC((*attrname), char *, namelen, M_TEMP, M_WAITOK);
806 memcpy((*attrname), name, namelen);
807 (*attrname)[namelen] = '\0';
808 }
809
810 return (0);
811 }
812
813 /*
814 * Lookup specifed node for filename, matching cnp,
815 * return fnode filled.
816 */
817 int
818 ntfs_ntlookupfile(struct ntfsmount *ntmp, struct vnode *vp,
819 struct componentname *cnp, struct vnode **vpp)
820 {
821 struct fnode *fp = VTOF(vp);
822 struct ntnode *ip = FTONT(fp);
823 struct ntvattr *vap; /* Root attribute */
824 cn_t cn; /* VCN in current attribute */
825 caddr_t rdbuf; /* Buffer to read directory's blocks */
826 u_int32_t blsize;
827 u_int32_t rdsize; /* Length of data to read from current block */
828 struct attr_indexentry *iep;
829 int error, res, anamelen, fnamelen;
830 const char *fname,*aname;
831 u_int32_t aoff;
832 int attrtype = NTFS_A_DATA;
833 char *attrname = NULL;
834 struct fnode *nfp;
835 struct vnode *nvp;
836 enum vtype f_type;
837
838 error = ntfs_ntget(ip);
839 if (error)
840 return (error);
841
842 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
843 if (error || (vap->va_flag & NTFS_AF_INRUN))
844 return (ENOTDIR);
845
846 blsize = vap->va_a_iroot->ir_size;
847 rdsize = vap->va_datalen;
848
849 /*
850 * Divide file name into: foofilefoofilefoofile[:attrspec]
851 * Store like this: fname:fnamelen [aname:anamelen]
852 */
853 fname = cnp->cn_nameptr;
854 aname = NULL;
855 anamelen = 0;
856 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
857 if(fname[fnamelen] == ':') {
858 aname = fname + fnamelen + 1;
859 anamelen = cnp->cn_namelen - fnamelen - 1;
860 dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
861 fname, fnamelen, aname, anamelen));
862 break;
863 }
864
865 dprintf(("ntfs_ntlookupfile: blksz: %d, rdsz: %d\n", blsize, rdsize));
866
867 MALLOC(rdbuf, caddr_t, blsize, M_TEMP, M_WAITOK);
868
869 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
870 0, rdsize, rdbuf, NULL);
871 if (error)
872 goto fail;
873
874 aoff = sizeof(struct attr_indexroot);
875
876 do {
877 iep = (struct attr_indexentry *) (rdbuf + aoff);
878
879 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
880 aoff += iep->reclen,
881 iep = (struct attr_indexentry *) (rdbuf + aoff))
882 {
883 ddprintf(("scan: %d, %d\n",
884 (u_int32_t) iep->ie_number,
885 (u_int32_t) iep->ie_fnametype));
886
887 /* check the name - the case-insensitible check
888 * has to come first, to break from this for loop
889 * if needed, so we can dive correctly */
890 res = NTFS_UASTRICMP(iep->ie_fname, iep->ie_fnamelen,
891 fname, fnamelen);
892 if (res > 0) break;
893 if (res < 0) continue;
894
895 if (iep->ie_fnametype == 0 ||
896 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
897 {
898 res = NTFS_UASTRCMP(iep->ie_fname,
899 iep->ie_fnamelen, fname, fnamelen);
900 if (res != 0) continue;
901 }
902
903 if (aname) {
904 error = ntfs_ntlookupattr(ntmp,
905 aname, anamelen,
906 &attrtype, &attrname);
907 if (error)
908 goto fail;
909 }
910
911 /* Check if we've found ourself */
912 if ((iep->ie_number == ip->i_number) &&
913 (attrtype == fp->f_attrtype) &&
914 ((!attrname && !fp->f_attrname) ||
915 (attrname && fp->f_attrname &&
916 !strcmp(attrname, fp->f_attrname))))
917 {
918 vref(vp);
919 *vpp = vp;
920 error = 0;
921 goto fail;
922 }
923
924 /* vget node, but don't load it */
925 error = ntfs_vgetex(ntmp->ntm_mountp,
926 iep->ie_number, attrtype, attrname,
927 LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
928 curthread, &nvp);
929
930 /* free the buffer returned by ntfs_ntlookupattr() */
931 if (attrname) {
932 FREE(attrname, M_TEMP);
933 attrname = NULL;
934 }
935
936 if (error)
937 goto fail;
938
939 nfp = VTOF(nvp);
940
941 if (nfp->f_flag & FN_VALID) {
942 *vpp = nvp;
943 goto fail;
944 }
945
946 nfp->f_fflag = iep->ie_fflag;
947 nfp->f_pnumber = iep->ie_fpnumber;
948 nfp->f_times = iep->ie_ftimes;
949
950 if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
951 (nfp->f_attrtype == NTFS_A_DATA) &&
952 (nfp->f_attrname == NULL))
953 f_type = VDIR;
954 else
955 f_type = VREG;
956
957 nvp->v_type = f_type;
958
959 if ((nfp->f_attrtype == NTFS_A_DATA) &&
960 (nfp->f_attrname == NULL))
961 {
962 /* Opening default attribute */
963 nfp->f_size = iep->ie_fsize;
964 nfp->f_allocated = iep->ie_fallocated;
965 nfp->f_flag |= FN_PRELOADED;
966 } else {
967 error = ntfs_filesize(ntmp, nfp,
968 &nfp->f_size, &nfp->f_allocated);
969 if (error) {
970 vput(nvp);
971 goto fail;
972 }
973 }
974
975 nfp->f_flag &= ~FN_VALID;
976 *vpp = nvp;
977 goto fail;
978 }
979
980 /* Dive if possible */
981 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
982 dprintf(("ntfs_ntlookupfile: diving\n"));
983
984 cn = *(cn_t *) (rdbuf + aoff +
985 iep->reclen - sizeof(cn_t));
986 rdsize = blsize;
987
988 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
989 ntfs_cntob(cn), rdsize, rdbuf, NULL);
990 if (error)
991 goto fail;
992
993 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
994 rdbuf, rdsize);
995 if (error)
996 goto fail;
997
998 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
999 0x18);
1000 } else {
1001 dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
1002 error = ENOENT;
1003 break;
1004 }
1005 } while (1);
1006
1007 dprintf(("finish\n"));
1008
1009 fail:
1010 if (attrname) FREE(attrname, M_TEMP);
1011 ntfs_ntvattrrele(vap);
1012 ntfs_ntput(ip);
1013 FREE(rdbuf, M_TEMP);
1014 return (error);
1015 }
1016
1017 /*
1018 * Check if name type is permitted to show.
1019 */
1020 int
1021 ntfs_isnamepermitted(struct ntfsmount *ntmp, struct attr_indexentry *iep)
1022 {
1023 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
1024 return 1;
1025
1026 switch (iep->ie_fnametype) {
1027 case 2:
1028 ddprintf(("ntfs_isnamepermitted: skiped DOS name\n"));
1029 return 0;
1030 case 0: case 1: case 3:
1031 return 1;
1032 default:
1033 printf("ntfs_isnamepermitted: " \
1034 "WARNING! Unknown file name type: %d\n",
1035 iep->ie_fnametype);
1036 break;
1037 }
1038 return 0;
1039 }
1040
1041 /*
1042 * Read ntfs dir like stream of attr_indexentry, not like btree of them.
1043 * This is done by scaning $BITMAP:$I30 for busy clusters and reading them.
1044 * Ofcouse $INDEX_ROOT:$I30 is read before. Last read values are stored in
1045 * fnode, so we can skip toward record number num almost immediatly.
1046 * Anyway this is rather slow routine. The problem is that we don't know
1047 * how many records are there in $INDEX_ALLOCATION:$I30 block.
1048 */
1049 int
1050 ntfs_ntreaddir(struct ntfsmount *ntmp, struct fnode *fp,
1051 u_int32_t num, struct attr_indexentry **riepp)
1052 {
1053 struct ntnode *ip = FTONT(fp);
1054 struct ntvattr *vap = NULL; /* IndexRoot attribute */
1055 struct ntvattr *bmvap = NULL; /* BitMap attribute */
1056 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */
1057 caddr_t rdbuf; /* Buffer to read directory's blocks */
1058 u_char *bmp = NULL; /* Bitmap */
1059 u_int32_t blsize; /* Index allocation size (2048) */
1060 u_int32_t rdsize; /* Length of data to read */
1061 u_int32_t attrnum; /* Current attribute type */
1062 u_int32_t cpbl = 1; /* Clusters per directory block */
1063 u_int32_t blnum;
1064 struct attr_indexentry *iep;
1065 int error = ENOENT;
1066 u_int32_t aoff, cnum;
1067
1068 dprintf(("ntfs_ntreaddir: read ino: %"PRId64", num: %d\n", ip->i_number, num));
1069 error = ntfs_ntget(ip);
1070 if (error)
1071 return (error);
1072
1073 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
1074 if (error)
1075 return (ENOTDIR);
1076
1077 if (fp->f_dirblbuf == NULL) {
1078 fp->f_dirblsz = vap->va_a_iroot->ir_size;
1079 MALLOC(fp->f_dirblbuf, caddr_t,
1080 max(vap->va_datalen,fp->f_dirblsz), M_NTFSDIR, M_WAITOK);
1081 }
1082
1083 blsize = fp->f_dirblsz;
1084 rdbuf = fp->f_dirblbuf;
1085
1086 dprintf(("ntfs_ntreaddir: rdbuf: 0x%p, blsize: %d\n", rdbuf, blsize));
1087
1088 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
1089 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
1090 0, &bmvap);
1091 if (error) {
1092 error = ENOTDIR;
1093 goto fail;
1094 }
1095 MALLOC(bmp, u_char *, bmvap->va_datalen, M_TEMP, M_WAITOK);
1096 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
1097 bmvap->va_datalen, bmp, NULL);
1098 if (error)
1099 goto fail;
1100
1101 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
1102 0, &iavap);
1103 if (error) {
1104 error = ENOTDIR;
1105 goto fail;
1106 }
1107 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
1108 dprintf(("ntfs_ntreaddir: indexalloc: %d, cpbl: %d\n",
1109 iavap->va_datalen, cpbl));
1110 } else {
1111 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
1112 iavap = bmvap = NULL;
1113 bmp = NULL;
1114 }
1115
1116 /* Try use previous values */
1117 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
1118 attrnum = fp->f_lastdattr;
1119 aoff = fp->f_lastdoff;
1120 blnum = fp->f_lastdblnum;
1121 cnum = fp->f_lastdnum;
1122 } else {
1123 attrnum = NTFS_A_INDXROOT;
1124 aoff = sizeof(struct attr_indexroot);
1125 blnum = 0;
1126 cnum = 0;
1127 }
1128
1129 do {
1130 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
1131 attrnum, (u_int32_t) blnum, cnum, num, aoff));
1132 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
1133 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
1134 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
1135 if (error)
1136 goto fail;
1137
1138 if (attrnum == NTFS_A_INDX) {
1139 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1140 rdbuf, rdsize);
1141 if (error)
1142 goto fail;
1143 }
1144 if (aoff == 0)
1145 aoff = (attrnum == NTFS_A_INDX) ?
1146 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
1147 sizeof(struct attr_indexroot);
1148
1149 iep = (struct attr_indexentry *) (rdbuf + aoff);
1150 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
1151 aoff += iep->reclen,
1152 iep = (struct attr_indexentry *) (rdbuf + aoff))
1153 {
1154 if (!ntfs_isnamepermitted(ntmp, iep)) continue;
1155
1156 if (cnum >= num) {
1157 fp->f_lastdnum = cnum;
1158 fp->f_lastdoff = aoff;
1159 fp->f_lastdblnum = blnum;
1160 fp->f_lastdattr = attrnum;
1161
1162 *riepp = iep;
1163
1164 error = 0;
1165 goto fail;
1166 }
1167 cnum++;
1168 }
1169
1170 if (iavap) {
1171 if (attrnum == NTFS_A_INDXROOT)
1172 blnum = 0;
1173 else
1174 blnum++;
1175
1176 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
1177 if (bmp[blnum >> 3] & (1 << (blnum & 3)))
1178 break;
1179 blnum++;
1180 }
1181
1182 attrnum = NTFS_A_INDX;
1183 aoff = 0;
1184 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
1185 break;
1186 dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
1187 }
1188 } while (iavap);
1189
1190 *riepp = NULL;
1191 fp->f_lastdnum = 0;
1192
1193 fail:
1194 if (vap)
1195 ntfs_ntvattrrele(vap);
1196 if (bmvap)
1197 ntfs_ntvattrrele(bmvap);
1198 if (iavap)
1199 ntfs_ntvattrrele(iavap);
1200 if (bmp)
1201 FREE(bmp, M_TEMP);
1202 ntfs_ntput(ip);
1203 return (error);
1204 }
1205
1206 /*
1207 * Convert NTFS times that are in 100 ns units and begins from
1208 * 1601 Jan 1 into unix times.
1209 */
1210 struct timespec
1211 ntfs_nttimetounix(u_int64_t nt)
1212 {
1213 struct timespec t;
1214
1215 /* WindowNT times are in 100 ns and from 1601 Jan 1 */
1216 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
1217 t.tv_sec = nt / (1000 * 1000 * 10) -
1218 369LL * 365LL * 24LL * 60LL * 60LL -
1219 89LL * 1LL * 24LL * 60LL * 60LL;
1220 return (t);
1221 }
1222
1223 /*
1224 * Get file times from NTFS_A_NAME attribute.
1225 */
1226 int
1227 ntfs_times(struct ntfsmount *ntmp, struct ntnode *ip, ntfs_times_t *tm)
1228 {
1229 struct ntvattr *vap;
1230 int error;
1231
1232 dprintf(("ntfs_times: ino: %"PRId64"...\n", ip->i_number));
1233
1234 error = ntfs_ntget(ip);
1235 if (error)
1236 return (error);
1237
1238 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
1239 if (error) {
1240 ntfs_ntput(ip);
1241 return (error);
1242 }
1243 *tm = vap->va_a_name->n_times;
1244 ntfs_ntvattrrele(vap);
1245 ntfs_ntput(ip);
1246
1247 return (0);
1248 }
1249
1250 /*
1251 * Get file sizes from corresponding attribute.
1252 *
1253 * ntnode under fnode should be locked.
1254 */
1255 int
1256 ntfs_filesize(struct ntfsmount *ntmp, struct fnode *fp, u_int64_t *size,
1257 u_int64_t *bytes)
1258 {
1259 struct ntvattr *vap;
1260 struct ntnode *ip = FTONT(fp);
1261 u_int64_t sz, bn;
1262 int error;
1263
1264 dprintf(("ntfs_filesize: ino: %"PRId64"\n", ip->i_number));
1265
1266 error = ntfs_ntvattrget(ntmp, ip,
1267 fp->f_attrtype, fp->f_attrname, 0, &vap);
1268 if (error)
1269 return (error);
1270
1271 bn = vap->va_allocated;
1272 sz = vap->va_datalen;
1273
1274 dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
1275 (u_int32_t) sz, (u_int32_t) bn));
1276
1277 if (size)
1278 *size = sz;
1279 if (bytes)
1280 *bytes = bn;
1281
1282 ntfs_ntvattrrele(vap);
1283
1284 return (0);
1285 }
1286
1287 /*
1288 * This is one of write routine.
1289 */
1290 int
1291 ntfs_writeattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1292 u_int32_t attrnum, char *attrname, off_t roff,
1293 size_t rsize, void *rdata, size_t *initp,
1294 struct uio *uio)
1295 {
1296 size_t init;
1297 int error = 0;
1298 off_t off = roff, left = rsize, towrite;
1299 caddr_t data = rdata;
1300 struct ntvattr *vap;
1301 *initp = 0;
1302
1303 while (left) {
1304 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1305 ntfs_btocn(off), &vap);
1306 if (error)
1307 return (error);
1308 towrite = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1309 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
1310 (u_int32_t) off, (u_int32_t) towrite,
1311 (u_int32_t) vap->va_vcnstart,
1312 (u_int32_t) vap->va_vcnend));
1313 error = ntfs_writentvattr_plain(ntmp, ip, vap,
1314 off - ntfs_cntob(vap->va_vcnstart),
1315 towrite, data, &init, uio);
1316 if (error) {
1317 printf("ntfs_writeattr_plain: " \
1318 "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
1319 (u_int32_t) off, (u_int32_t) towrite);
1320 printf("ntfs_writeattr_plain: attrib: %d - %d\n",
1321 (u_int32_t) vap->va_vcnstart,
1322 (u_int32_t) vap->va_vcnend);
1323 ntfs_ntvattrrele(vap);
1324 break;
1325 }
1326 ntfs_ntvattrrele(vap);
1327 left -= towrite;
1328 off += towrite;
1329 data = data + towrite;
1330 *initp += init;
1331 }
1332
1333 return (error);
1334 }
1335
1336 /*
1337 * This is one of write routine.
1338 *
1339 * ntnode should be locked.
1340 */
1341 int
1342 ntfs_writentvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1343 struct ntvattr *vap, off_t roff, size_t rsize,
1344 void *rdata, size_t *initp, struct uio *uio)
1345 {
1346 int error = 0;
1347 int off;
1348 int cnt;
1349 cn_t ccn, ccl, cn, left, cl;
1350 caddr_t data = rdata;
1351 struct buf *bp;
1352 size_t tocopy;
1353
1354 *initp = 0;
1355
1356 if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
1357 printf("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n");
1358 return ENOTTY;
1359 }
1360
1361 ddprintf(("ntfs_writentvattr_plain: data in run: %ld chains\n",
1362 vap->va_vruncnt));
1363
1364 off = roff;
1365 left = rsize;
1366 ccl = 0;
1367 ccn = 0;
1368 cnt = 0;
1369 for (; left && (cnt < vap->va_vruncnt); cnt++) {
1370 ccn = vap->va_vruncn[cnt];
1371 ccl = vap->va_vruncl[cnt];
1372
1373 ddprintf(("ntfs_writentvattr_plain: " \
1374 "left %d, cn: 0x%x, cl: %d, off: %d\n", \
1375 (u_int32_t) left, (u_int32_t) ccn, \
1376 (u_int32_t) ccl, (u_int32_t) off));
1377
1378 if (ntfs_cntob(ccl) < off) {
1379 off -= ntfs_cntob(ccl);
1380 cnt++;
1381 continue;
1382 }
1383 if (!ccn && ip->i_number != NTFS_BOOTINO)
1384 continue; /* XXX */
1385
1386 ccl -= ntfs_btocn(off);
1387 cn = ccn + ntfs_btocn(off);
1388 off = ntfs_btocnoff(off);
1389
1390 while (left && ccl) {
1391 #if defined(__DragonFly__)
1392 tocopy = min(left,
1393 min(ntfs_cntob(ccl) - off, MAXBSIZE - off));
1394 #else
1395 /* under NetBSD, bread() can read
1396 * maximum one block worth of data */
1397 tocopy = min(left, ntmp->ntm_bps - off);
1398 #endif
1399 cl = ntfs_btocl(tocopy + off);
1400 ddprintf(("ntfs_writentvattr_plain: write: " \
1401 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
1402 (u_int32_t) cn, (u_int32_t) cl,
1403 (u_int32_t) off, (u_int32_t) tocopy,
1404 (u_int32_t) left));
1405 if ((off == 0) && (tocopy == ntfs_cntob(cl)))
1406 {
1407 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn),
1408 ntfs_cntob(cl), 0, 0);
1409 clrbuf(bp);
1410 } else {
1411 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
1412 ntfs_cntob(cl), &bp);
1413 if (error) {
1414 brelse(bp);
1415 return (error);
1416 }
1417 }
1418 if (uio)
1419 uiomove(bp->b_data + off, tocopy, uio);
1420 else
1421 memcpy(bp->b_data + off, data, tocopy);
1422 bawrite(bp);
1423 data = data + tocopy;
1424 *initp += tocopy;
1425 off = 0;
1426 left -= tocopy;
1427 cn += cl;
1428 ccl -= cl;
1429 }
1430 }
1431
1432 if (left) {
1433 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
1434 error = EINVAL;
1435 }
1436
1437 return (error);
1438 }
1439
1440 /*
1441 * This is one of read routines.
1442 *
1443 * ntnode should be locked.
1444 */
1445 int
1446 ntfs_readntvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1447 struct ntvattr *vap, off_t roff, size_t rsize,
1448 void *rdata, size_t *initp, struct uio *uio)
1449 {
1450 int error = 0;
1451 int off;
1452
1453 *initp = 0;
1454 if (vap->va_flag & NTFS_AF_INRUN) {
1455 int cnt;
1456 cn_t ccn, ccl, cn, left, cl;
1457 caddr_t data = rdata;
1458 struct buf *bp;
1459 size_t tocopy;
1460
1461 ddprintf(("ntfs_readntvattr_plain: data in run: %ld chains\n",
1462 vap->va_vruncnt));
1463
1464 off = roff;
1465 left = rsize;
1466 ccl = 0;
1467 ccn = 0;
1468 cnt = 0;
1469 while (left && (cnt < vap->va_vruncnt)) {
1470 ccn = vap->va_vruncn[cnt];
1471 ccl = vap->va_vruncl[cnt];
1472
1473 ddprintf(("ntfs_readntvattr_plain: " \
1474 "left %d, cn: 0x%x, cl: %d, off: %d\n", \
1475 (u_int32_t) left, (u_int32_t) ccn, \
1476 (u_int32_t) ccl, (u_int32_t) off));
1477
1478 if (ntfs_cntob(ccl) < off) {
1479 off -= ntfs_cntob(ccl);
1480 cnt++;
1481 continue;
1482 }
1483 if (ccn || ip->i_number == NTFS_BOOTINO) {
1484 ccl -= ntfs_btocn(off);
1485 cn = ccn + ntfs_btocn(off);
1486 off = ntfs_btocnoff(off);
1487
1488 while (left && ccl) {
1489 #if defined(__DragonFly__)
1490 tocopy = min(left,
1491 min(ntfs_cntob(ccl) - off,
1492 MAXBSIZE - off));
1493 #else
1494 /* under NetBSD, bread() can read
1495 * maximum one block worth of data */
1496 tocopy = min(left,
1497 ntmp->ntm_bps - off);
1498 #endif
1499 cl = ntfs_btocl(tocopy + off);
1500 ddprintf(("ntfs_readntvattr_plain: " \
1501 "read: cn: 0x%x cl: %d, " \
1502 "off: %d len: %d, left: %d\n",
1503 (u_int32_t) cn,
1504 (u_int32_t) cl,
1505 (u_int32_t) off,
1506 (u_int32_t) tocopy,
1507 (u_int32_t) left));
1508 error = bread(ntmp->ntm_devvp,
1509 ntfs_cntobn(cn),
1510 ntfs_cntob(cl),
1511 &bp);
1512 if (error) {
1513 brelse(bp);
1514 return (error);
1515 }
1516 if (uio) {
1517 uiomove(bp->b_data + off,
1518 tocopy, uio);
1519 } else {
1520 memcpy(data, bp->b_data + off,
1521 tocopy);
1522 }
1523 brelse(bp);
1524 data = data + tocopy;
1525 *initp += tocopy;
1526 off = 0;
1527 left -= tocopy;
1528 cn += cl;
1529 ccl -= cl;
1530 }
1531 } else {
1532 tocopy = min(left, ntfs_cntob(ccl) - off);
1533 ddprintf(("ntfs_readntvattr_plain: "
1534 "hole: ccn: 0x%x ccl: %d, off: %d, " \
1535 " len: %d, left: %d\n",
1536 (u_int32_t) ccn, (u_int32_t) ccl,
1537 (u_int32_t) off, (u_int32_t) tocopy,
1538 (u_int32_t) left));
1539 left -= tocopy;
1540 off = 0;
1541 if (uio) {
1542 size_t remains = tocopy;
1543 for(; remains; remains++)
1544 uiomove("", 1, uio);
1545 } else
1546 bzero(data, tocopy);
1547 data = data + tocopy;
1548 }
1549 cnt++;
1550 }
1551 if (left) {
1552 printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
1553 error = E2BIG;
1554 }
1555 } else {
1556 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
1557 if (uio)
1558 uiomove(vap->va_datap + roff, rsize, uio);
1559 else
1560 memcpy(rdata, vap->va_datap + roff, rsize);
1561 *initp += rsize;
1562 }
1563
1564 return (error);
1565 }
1566
1567 /*
1568 * This is one of read routines.
1569 */
1570 int
1571 ntfs_readattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1572 u_int32_t attrnum, char *attrname, off_t roff,
1573 size_t rsize, void *rdata, size_t * initp,
1574 struct uio *uio)
1575 {
1576 size_t init;
1577 int error = 0;
1578 off_t off = roff, left = rsize, toread;
1579 caddr_t data = rdata;
1580 struct ntvattr *vap;
1581 *initp = 0;
1582
1583 while (left) {
1584 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1585 ntfs_btocn(off), &vap);
1586 if (error)
1587 return (error);
1588 toread = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1589 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
1590 (u_int32_t) off, (u_int32_t) toread,
1591 (u_int32_t) vap->va_vcnstart,
1592 (u_int32_t) vap->va_vcnend));
1593 error = ntfs_readntvattr_plain(ntmp, ip, vap,
1594 off - ntfs_cntob(vap->va_vcnstart),
1595 toread, data, &init, uio);
1596 if (error) {
1597 printf("ntfs_readattr_plain: " \
1598 "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
1599 (u_int32_t) off, (u_int32_t) toread);
1600 printf("ntfs_readattr_plain: attrib: %d - %d\n",
1601 (u_int32_t) vap->va_vcnstart,
1602 (u_int32_t) vap->va_vcnend);
1603 ntfs_ntvattrrele(vap);
1604 break;
1605 }
1606 ntfs_ntvattrrele(vap);
1607 left -= toread;
1608 off += toread;
1609 data = data + toread;
1610 *initp += init;
1611 }
1612
1613 return (error);
1614 }
1615
1616 /*
1617 * This is one of read routines.
1618 */
1619 int
1620 ntfs_readattr(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t attrnum,
1621 char *attrname, off_t roff, size_t rsize, void *rdata,
1622 struct uio *uio)
1623 {
1624 int error = 0;
1625 struct ntvattr *vap;
1626 size_t init;
1627
1628 ddprintf(("ntfs_readattr: reading %"PRId64": 0x%x, from %d size %d bytes\n",
1629 ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
1630
1631 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
1632 if (error)
1633 return (error);
1634
1635 if ((roff > vap->va_datalen) ||
1636 (roff + rsize > vap->va_datalen)) {
1637 ddprintf(("ntfs_readattr: offset too big\n"));
1638 ntfs_ntvattrrele(vap);
1639 return (E2BIG);
1640 }
1641 if (vap->va_compression && vap->va_compressalg) {
1642 u_int8_t *cup;
1643 u_int8_t *uup;
1644 off_t off = roff, left = rsize, tocopy;
1645 caddr_t data = rdata;
1646 cn_t cn;
1647
1648 ddprintf(("ntfs_ntreadattr: compression: %d\n",
1649 vap->va_compressalg));
1650
1651 MALLOC(cup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
1652 M_NTFSDECOMP, M_WAITOK);
1653 MALLOC(uup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
1654 M_NTFSDECOMP, M_WAITOK);
1655
1656 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
1657 off = roff - ntfs_cntob(cn);
1658
1659 while (left) {
1660 error = ntfs_readattr_plain(ntmp, ip, attrnum,
1661 attrname, ntfs_cntob(cn),
1662 ntfs_cntob(NTFS_COMPUNIT_CL),
1663 cup, &init, NULL);
1664 if (error)
1665 break;
1666
1667 tocopy = min(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
1668
1669 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
1670 if (uio)
1671 uiomove(cup + off, tocopy, uio);
1672 else
1673 memcpy(data, cup + off, tocopy);
1674 } else if (init == 0) {
1675 if (uio) {
1676 size_t remains = tocopy;
1677 for(; remains; remains--)
1678 uiomove("", 1, uio);
1679 }
1680 else
1681 bzero(data, tocopy);
1682 } else {
1683 error = ntfs_uncompunit(ntmp, uup, cup);
1684 if (error)
1685 break;
1686 if (uio)
1687 uiomove(uup + off, tocopy, uio);
1688 else
1689 memcpy(data, uup + off, tocopy);
1690 }
1691
1692 left -= tocopy;
1693 data = data + tocopy;
1694 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
1695 cn += NTFS_COMPUNIT_CL;
1696 }
1697
1698 FREE(uup, M_NTFSDECOMP);
1699 FREE(cup, M_NTFSDECOMP);
1700 } else
1701 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
1702 roff, rsize, rdata, &init, uio);
1703 ntfs_ntvattrrele(vap);
1704 return (error);
1705 }
1706
1707 #if UNUSED_CODE
1708 int
1709 ntfs_parserun(cn_t *cn, cn_t *cl, u_int8_t *run, u_long len, u_long *off)
1710 {
1711 u_int8_t sz;
1712 int i;
1713
1714 if (NULL == run) {
1715 printf("ntfs_parsetun: run == NULL\n");
1716 return (EINVAL);
1717 }
1718 sz = run[(*off)++];
1719 if (0 == sz) {
1720 printf("ntfs_parserun: trying to go out of run\n");
1721 return (E2BIG);
1722 }
1723 *cl = 0;
1724 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1725 printf("ntfs_parserun: " \
1726 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1727 sz, len, *off);
1728 return (EINVAL);
1729 }
1730 for (i = 0; i < (sz & 0xF); i++)
1731 *cl += (u_int32_t) run[(*off)++] << (i << 3);
1732
1733 sz >>= 4;
1734 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1735 printf("ntfs_parserun: " \
1736 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1737 sz, len, *off);
1738 return (EINVAL);
1739 }
1740 for (i = 0; i < (sz & 0xF); i++)
1741 *cn += (u_int32_t) run[(*off)++] << (i << 3);
1742
1743 return (0);
1744 }
1745 #endif
1746
1747 /*
1748 * Process fixup routine on given buffer.
1749 */
1750 int
1751 ntfs_procfixups(struct ntfsmount *ntmp, u_int32_t magic, caddr_t buf,
1752 size_t len)
1753 {
1754 struct fixuphdr *fhp = (struct fixuphdr *) buf;
1755 int i;
1756 u_int16_t fixup;
1757 u_int16_t *fxp;
1758 u_int16_t *cfxp;
1759
1760 if (fhp->fh_magic != magic) {
1761 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
1762 fhp->fh_magic, magic);
1763 return (EINVAL);
1764 }
1765 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
1766 printf("ntfs_procfixups: " \
1767 "bad fixups number: %d for %ld bytes block\n",
1768 fhp->fh_fnum, (long)len); /* XXX printf kludge */
1769 return (EINVAL);
1770 }
1771 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
1772 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
1773 return (EINVAL);
1774 }
1775 fxp = (u_int16_t *) (buf + fhp->fh_foff);
1776 cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
1777 fixup = *fxp++;
1778 for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
1779 if (*cfxp != fixup) {
1780 printf("ntfs_procfixups: fixup %d doesn't match\n", i);
1781 return (EINVAL);
1782 }
1783 *cfxp = *fxp;
1784 cfxp = (u_int16_t *)(((caddr_t) cfxp) + ntmp->ntm_bps);
1785 }
1786 return (0);
1787 }
1788
1789 #if UNUSED_CODE
1790 int
1791 ntfs_runtocn(cn_t *cn, struct ntfsmount *ntmp, u_int8_t *run, u_long len,
1792 cn_t vcn)
1793 {
1794 cn_t ccn = 0;
1795 cn_t ccl = 0;
1796 u_long off = 0;
1797 int error = 0;
1798
1799 #if NTFS_DEBUG
1800 int i;
1801 printf("ntfs_runtocn: run: 0x%p, %ld bytes, vcn:%ld\n",
1802 run, len, (u_long) vcn);
1803 printf("ntfs_runtocn: run: ");
1804 for (i = 0; i < len; i++)
1805 printf("0x%02x ", run[i]);
1806 printf("\n");
1807 #endif
1808
1809 if (NULL == run) {
1810 printf("ntfs_runtocn: run == NULL\n");
1811 return (EINVAL);
1812 }
1813 do {
1814 if (run[off] == 0) {
1815 printf("ntfs_runtocn: vcn too big\n");
1816 return (E2BIG);
1817 }
1818 vcn -= ccl;
1819 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
1820 if (error) {
1821 printf("ntfs_runtocn: ntfs_parserun failed\n");
1822 return (error);
1823 }
1824 } while (ccl <= vcn);
1825 *cn = ccn + vcn;
1826 return (0);
1827 }
1828 #endif
1829
1830 /*
1831 * this initializes toupper table & dependant variables to be ready for
1832 * later work
1833 */
1834 void
1835 ntfs_toupper_init(void)
1836 {
1837 ntfs_toupper_tab = (wchar *) NULL;
1838 lockinit(&ntfs_toupper_lock, 0, "ntfs_toupper", 0, 0);
1839 ntfs_toupper_usecount = 0;
1840 }
1841
1842 /*
1843 * if the ntfs_toupper_tab[] is filled already, just raise use count;
1844 * otherwise read the data from the filesystem we are currently mounting
1845 */
1846 int
1847 ntfs_toupper_use(struct mount *mp, struct ntfsmount *ntmp)
1848 {
1849 int error = 0;
1850 struct vnode *vp;
1851
1852 /* get exclusive access */
1853 LOCKMGR(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
1854
1855 /* only read the translation data from a file if it hasn't been
1856 * read already */
1857 if (ntfs_toupper_tab)
1858 goto out;
1859
1860 /*
1861 * Read in Unicode lowercase -> uppercase translation file.
1862 * XXX for now, just the first 256 entries are used anyway,
1863 * so don't bother reading more
1864 */
1865 MALLOC(ntfs_toupper_tab, wchar *, 65536 * sizeof(wchar),
1866 M_NTFSRDATA, M_WAITOK);
1867
1868 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp)))
1869 goto out;
1870 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
1871 0, 65536*sizeof(wchar), (char *) ntfs_toupper_tab, NULL);
1872 vput(vp);
1873
1874 out:
1875 ntfs_toupper_usecount++;
1876 LOCKMGR(&ntfs_toupper_lock, LK_RELEASE, NULL);
1877 return (error);
1878 }
1879
1880 /*
1881 * lower the use count and if it reaches zero, free the memory
1882 * tied by toupper table
1883 */
1884 void
1885 ntfs_toupper_unuse(void)
1886 {
1887 /* get exclusive access */
1888 LOCKMGR(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
1889
1890 ntfs_toupper_usecount--;
1891 if (ntfs_toupper_usecount == 0) {
1892 FREE(ntfs_toupper_tab, M_NTFSRDATA);
1893 ntfs_toupper_tab = NULL;
1894 }
1895 #ifdef DIAGNOSTIC
1896 else if (ntfs_toupper_usecount < 0) {
1897 panic("ntfs_toupper_unuse(): use count negative: %d\n",
1898 ntfs_toupper_usecount);
1899 }
1900 #endif
1901
1902 /* release the lock */
1903 LOCKMGR(&ntfs_toupper_lock, LK_RELEASE, NULL);
1904 }
1905
1906 int
1907 ntfs_u28_init(struct ntfsmount *ntmp, wchar *u2w)
1908 {
1909 char ** u28;
1910 int i, j, h, l;
1911
1912 MALLOC(u28, char **, 256 * sizeof(char*), M_TEMP, M_WAITOK | M_ZERO);
1913
1914 for (i=0; i<256; i++) {
1915 h = (u2w[i] >> 8) & 0xFF;
1916 l = (u2w[i]) &0xFF;
1917
1918 if (u28[h] == NULL) {
1919 MALLOC(u28[h], char *, 256 * sizeof(char), M_TEMP, M_WAITOK);
1920 for (j=0; j<256; j++)
1921 u28[h][j] = '_';
1922 }
1923
1924 u28[h][l] = i & 0xFF;
1925 }
1926
1927 ntmp->ntm_u28 = u28;
1928
1929 return (0);
1930 }
1931
1932 int
1933 ntfs_u28_uninit(struct ntfsmount *ntmp)
1934 {
1935 char ** u28;
1936 int i;
1937
1938 if (ntmp->ntm_u28 == NULL)
1939 return (0);
1940
1941 u28 = ntmp->ntm_u28;
1942
1943 for (i=0; i<256; i++)
1944 if (u28[i] != NULL)
1945 FREE(u28[i], M_TEMP);
1946
1947 FREE(u28, M_TEMP);
1948
1949 return (0);
1950 }
1951
1952 int
1953 ntfs_82u_init(struct ntfsmount *ntmp, u_int16_t *u2w)
1954 {
1955 wchar * _82u;
1956 int i;
1957
1958 MALLOC(_82u, wchar *, 256 * sizeof(wchar), M_TEMP, M_WAITOK);
1959
1960 if (u2w == NULL) {
1961 for (i=0; i<256; i++)
1962 _82u[i] = i;
1963 } else {
1964 for (i=0; i<128; i++)
1965 _82u[i] = i;
1966 for (i=0; i<128; i++)
1967 _82u[i+128] = u2w[i];
1968 }
1969
1970 ntmp->ntm_82u = _82u;
1971
1972 return (0);
1973 }
1974
1975 int
1976 ntfs_82u_uninit(struct ntfsmount *ntmp)
1977 {
1978 FREE(ntmp->ntm_82u, M_TEMP);
1979 return (0);
1980 }
1981
1982 /*
1983 * maps the Unicode char to 8bit equivalent
1984 * XXX currently only gets lower 8bit from the Unicode char
1985 * and substitutes a '_' for it if the result would be '\0';
1986 * something better has to be definitely though out
1987 */
1988 char
1989 ntfs_u28(struct ntfsmount *ntmp, wchar wc)
1990 {
1991 char * p;
1992
1993 p = ntmp->ntm_u28[(wc>>8)&0xFF];
1994 if (p == NULL)
1995 return ('_');
1996 return (p[wc&0xFF]);
1997 }
1998
A repo for keeping AMD64 port code before merging with the master