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kernel - VM PAGER part 2/2 - Expand vinitvmio() and vnode_pager_alloc()
[dragonfly.git] / sys / vfs / ntfs / ntfs_subr.c
blob9c320578866cdf64699171527b4169d060719f59
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 1.27 2008/01/05 14:02:41 swildner 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 #include <sys/iconv.h>
47
48 #include <machine/inttypes.h>
49
50 #if defined(__NetBSD__)
51 #include <miscfs/specfs/specdev.h>
52 #endif
53
54 /* #define NTFS_DEBUG 1 */
55 #include "ntfs.h"
56 #include "ntfsmount.h"
57 #include "ntfs_inode.h"
58 #include "ntfs_vfsops.h"
59 #include "ntfs_subr.h"
60 #include "ntfs_compr.h"
61 #include "ntfs_ihash.h"
62
63 #if defined(__DragonFly__)
64 MALLOC_DEFINE(M_NTFSNTVATTR, "NTFS vattr", "NTFS file attribute information");
65 MALLOC_DEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
66 MALLOC_DEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
67 MALLOC_DEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
68 #endif
69
70 static int ntfs_ntlookupattr (struct ntfsmount *, const char *, int, int *, char **);
71 static int ntfs_findvattr (struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t);
72 static int ntfs_uastricmp (struct ntfsmount *, const wchar *, size_t, const char *, size_t);
73 static int ntfs_uastrcmp (struct ntfsmount *, const wchar *, size_t, const char *, size_t);
74
75 /* table for mapping Unicode chars into uppercase; it's filled upon first
76 * ntfs mount, freed upon last ntfs umount */
77 static wchar *ntfs_toupper_tab;
78 #define NTFS_TOUPPER(ch) (ntfs_toupper_tab[(ch)])
79 static struct lock ntfs_toupper_lock;
80 static signed int ntfs_toupper_usecount;
81 extern struct iconv_functions *ntfs_iconv;
82
83 /* support macro for ntfs_ntvattrget() */
84 #define NTFS_AALPCMP(aalp,type,name,namelen) ( \
85 (aalp->al_type == type) && (aalp->al_namelen == namelen) && \
86 !NTFS_UASTRCMP(aalp->al_name,aalp->al_namelen,name,namelen) )
87
88 /*
89 *
90 */
91 int
92 ntfs_ntvattrrele(struct ntvattr *vap)
93 {
94 dprintf(("ntfs_ntvattrrele: ino: %"PRId64", type: 0x%x\n",
95 vap->va_ip->i_number, vap->va_type));
96
97 ntfs_ntrele(vap->va_ip);
98
99 return (0);
100 }
101
102 /*
103 * find the attribute in the ntnode
104 */
105 static int
106 ntfs_findvattr(struct ntfsmount *ntmp, struct ntnode *ip,
107 struct ntvattr **lvapp, struct ntvattr **vapp, u_int32_t type,
108 const char *name, size_t namelen, cn_t vcn)
109 {
110 int error;
111 struct ntvattr *vap;
112
113 if((ip->i_flag & IN_LOADED) == 0) {
114 dprintf(("ntfs_findvattr: node not loaded, ino: %"PRId64"\n",
115 ip->i_number));
116 error = ntfs_loadntnode(ntmp,ip);
117 if (error) {
118 kprintf("ntfs_findvattr: FAILED TO LOAD INO: %"PRId64"\n",
119 ip->i_number);
120 return (error);
121 }
122 }
123
124 *lvapp = NULL;
125 *vapp = NULL;
126 for (vap = ip->i_valist.lh_first; vap; vap = vap->va_list.le_next) {
127 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %d - %d\n", \
128 vap->va_type, (u_int32_t) vap->va_vcnstart, \
129 (u_int32_t) vap->va_vcnend));
130 if ((vap->va_type == type) &&
131 (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
132 (vap->va_namelen == namelen) &&
133 (strncmp(name, vap->va_name, namelen) == 0)) {
134 *vapp = vap;
135 ntfs_ntref(vap->va_ip);
136 return (0);
137 }
138 if (vap->va_type == NTFS_A_ATTRLIST)
139 *lvapp = vap;
140 }
141
142 return (-1);
143 }
144
145 /*
146 * Search attribute specifed in ntnode (load ntnode if nessecary).
147 * If not found but ATTR_A_ATTRLIST present, read it in and search throught.
148 * VOP_VGET node needed, and lookup througth it's ntnode (load if nessesary).
149 *
150 * ntnode should be locked
151 */
152 int
153 ntfs_ntvattrget(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t type,
154 const char *name, cn_t vcn, struct ntvattr **vapp)
155 {
156 struct ntvattr *lvap = NULL;
157 struct attr_attrlist *aalp;
158 struct attr_attrlist *nextaalp;
159 struct vnode *newvp;
160 struct ntnode *newip;
161 caddr_t alpool;
162 size_t namelen, len;
163 int error;
164
165 *vapp = NULL;
166
167 if (name) {
168 dprintf(("ntfs_ntvattrget: " \
169 "ino: %"PRId64", type: 0x%x, name: %s, vcn: %d\n", \
170 ip->i_number, type, name, (u_int32_t) vcn));
171 namelen = strlen(name);
172 } else {
173 dprintf(("ntfs_ntvattrget: " \
174 "ino: %"PRId64", type: 0x%x, vcn: %d\n", \
175 ip->i_number, type, (u_int32_t) vcn));
176 name = "";
177 namelen = 0;
178 }
179
180 error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
181 if (error >= 0)
182 return (error);
183
184 if (!lvap) {
185 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
186 "ino: %"PRId64", type: 0x%x, name: %s, vcn: %d\n", \
187 ip->i_number, type, name, (u_int32_t) vcn));
188 return (ENOENT);
189 }
190 /* Scan $ATTRIBUTE_LIST for requested attribute */
191 len = lvap->va_datalen;
192 MALLOC(alpool, caddr_t, len, M_TEMP, M_WAITOK);
193 error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
194 NULL);
195 if (error)
196 goto out;
197
198 aalp = (struct attr_attrlist *) alpool;
199 nextaalp = NULL;
200
201 for(; len > 0; aalp = nextaalp) {
202 dprintf(("ntfs_ntvattrget: " \
203 "attrlist: ino: %d, attr: 0x%x, vcn: %d\n", \
204 aalp->al_inumber, aalp->al_type, \
205 (u_int32_t) aalp->al_vcnstart));
206
207 if (len > aalp->reclen) {
208 nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
209 } else {
210 nextaalp = NULL;
211 }
212 len -= aalp->reclen;
213
214 if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
215 (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
216 NTFS_AALPCMP(nextaalp, type, name, namelen)))
217 continue;
218
219 dprintf(("ntfs_ntvattrget: attribute in ino: %d\n",
220 aalp->al_inumber));
221
222 /* this is not a main record, so we can't use just plain
223 vget() */
224 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
225 NTFS_A_DATA, NULL, LK_EXCLUSIVE,
226 VG_EXT, curthread, &newvp);
227 if (error) {
228 kprintf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
229 aalp->al_inumber);
230 goto out;
231 }
232 newip = VTONT(newvp);
233 /* XXX have to lock ntnode */
234 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
235 type, name, namelen, vcn);
236 vput(newvp);
237 if (error == 0)
238 goto out;
239 kprintf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
240 break;
241 }
242 error = ENOENT;
243
244 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
245 "ino: %"PRId64", type: 0x%x, name: %.*s, vcn: %d\n", \
246 ip->i_number, type, (int) namelen, name, (u_int32_t) vcn));
247 out:
248 FREE(alpool, M_TEMP);
249 return (error);
250 }
251
252 /*
253 * Read ntnode from disk, make ntvattr list.
254 *
255 * ntnode should be locked
256 */
257 int
258 ntfs_loadntnode(struct ntfsmount *ntmp, struct ntnode *ip)
259 {
260 struct filerec *mfrp;
261 daddr_t bn;
262 int error,off;
263 struct attr *ap;
264 struct ntvattr *nvap;
265
266 dprintf(("ntfs_loadntnode: loading ino: %"PRId64"\n",ip->i_number));
267
268 MALLOC(mfrp, struct filerec *, ntfs_bntob(ntmp->ntm_bpmftrec),
269 M_TEMP, M_WAITOK);
270
271 if (ip->i_number < NTFS_SYSNODESNUM) {
272 struct buf *bp;
273
274 dprintf(("ntfs_loadntnode: read system node\n"));
275
276 bn = ntfs_cntobn(ntmp->ntm_mftcn) +
277 ntmp->ntm_bpmftrec * ip->i_number;
278
279 error = bread(ntmp->ntm_devvp,
280 ntfs_bntodoff(bn), ntfs_bntob(ntmp->ntm_bpmftrec), &bp);
281 if (error) {
282 kprintf("ntfs_loadntnode: BREAD FAILED\n");
283 brelse(bp);
284 goto out;
285 }
286 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
287 bqrelse(bp);
288 } else {
289 struct vnode *vp;
290
291 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
292 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
293 ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
294 ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
295 if (error) {
296 kprintf("ntfs_loadntnode: ntfs_readattr failed\n");
297 goto out;
298 }
299 }
300
301 /* Check if magic and fixups are correct */
302 error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp,
303 ntfs_bntob(ntmp->ntm_bpmftrec));
304 if (error) {
305 kprintf("ntfs_loadntnode: BAD MFT RECORD %"PRId64"\n",
306 ip->i_number);
307 goto out;
308 }
309
310 dprintf(("ntfs_loadntnode: load attrs for ino: %"PRId64"\n",ip->i_number));
311 off = mfrp->fr_attroff;
312 ap = (struct attr *) ((caddr_t)mfrp + off);
313
314 LIST_INIT(&ip->i_valist);
315
316 while (ap->a_hdr.a_type != -1) {
317 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
318 if (error)
319 break;
320 nvap->va_ip = ip;
321
322 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
323
324 off += ap->a_hdr.reclen;
325 ap = (struct attr *) ((caddr_t)mfrp + off);
326 }
327 if (error) {
328 kprintf("ntfs_loadntnode: failed to load attr ino: %"PRId64"\n",
329 ip->i_number);
330 goto out;
331 }
332
333 ip->i_mainrec = mfrp->fr_mainrec;
334 ip->i_nlink = mfrp->fr_nlink;
335 ip->i_frflag = mfrp->fr_flags;
336
337 ip->i_flag |= IN_LOADED;
338
339 out:
340 FREE(mfrp, M_TEMP);
341 return (error);
342 }
343
344 /*
345 * Routine locks ntnode and increase usecount, just opposite of
346 * ntfs_ntput().
347 */
348 int
349 ntfs_ntget(struct ntnode *ip)
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);
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));
383
384 MALLOC(ip, struct ntnode *, sizeof(struct ntnode),
385 M_NTFSNTNODE, M_WAITOK | M_ZERO);
386 ddprintf(("ntfs_ntlookup: allocating ntnode: %d: %p\n", ino, ip));
387
388 /* Generic initialization */
389 ip->i_devvp = ntmp->ntm_devvp;
390 ip->i_dev = ntmp->ntm_dev;
391 ip->i_number = ino;
392 ip->i_mp = ntmp;
393
394 LIST_INIT(&ip->i_fnlist);
395 vref(ip->i_devvp);
396
397 /* init lock and lock the newborn ntnode */
398 lockinit(&ip->i_lock, "ntnode", 0, LK_EXCLUSIVE);
399 spin_init(&ip->i_interlock);
400 ntfs_ntget(ip);
401
402 ntfs_nthashins(ip);
403
404 LOCKMGR(&ntfs_hashlock, LK_RELEASE);
405
406 *ipp = ip;
407
408 dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
409 ino, ip, ip->i_usecount));
410
411 return (0);
412 }
413
414 /*
415 * Decrement usecount of ntnode and unlock it, if usecount reach zero,
416 * deallocate ntnode.
417 *
418 * ntnode should be locked on entry, and unlocked on return.
419 */
420 void
421 ntfs_ntput(struct ntnode *ip)
422 {
423 struct ntvattr *vap;
424
425 dprintf(("ntfs_ntput: rele ntnode %"PRId64": %p, usecount: %d\n",
426 ip->i_number, ip, ip->i_usecount));
427
428 spin_lock_wr(&ip->i_interlock);
429 ip->i_usecount--;
430
431 #ifdef DIAGNOSTIC
432 if (ip->i_usecount < 0) {
433 spin_unlock_wr(&ip->i_interlock);
434 panic("ntfs_ntput: ino: %"PRId64" usecount: %d \n",
435 ip->i_number,ip->i_usecount);
436 }
437 #endif
438
439 if (ip->i_usecount > 0) {
440 spin_unlock_wr(&ip->i_interlock);
441 LOCKMGR(&ip->i_lock, LK_RELEASE);
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_wr(&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_wr(&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 dprintf(("ntfs_ntrele: rele ntnode %"PRId64": %p, usecount: %d\n",
487 ip->i_number, ip, ip->i_usecount));
488
489 spin_lock_wr(&ip->i_interlock);
490 ip->i_usecount--;
491
492 if (ip->i_usecount < 0) {
493 spin_unlock_wr(&ip->i_interlock);
494 panic("ntfs_ntrele: ino: %"PRId64" usecount: %d \n",
495 ip->i_number,ip->i_usecount);
496 }
497 spin_unlock_wr(&ip->i_interlock);
498 }
499
500 /*
501 * Deallocate all memory allocated for ntvattr
502 */
503 void
504 ntfs_freentvattr(struct ntvattr *vap)
505 {
506 if (vap->va_flag & NTFS_AF_INRUN) {
507 if (vap->va_vruncn)
508 FREE(vap->va_vruncn, M_NTFSRUN);
509 if (vap->va_vruncl)
510 FREE(vap->va_vruncl, M_NTFSRUN);
511 } else {
512 if (vap->va_datap)
513 FREE(vap->va_datap, M_NTFSRDATA);
514 }
515 FREE(vap, M_NTFSNTVATTR);
516 }
517
518 /*
519 * Convert disk image of attribute into ntvattr structure,
520 * runs are expanded also.
521 */
522 int
523 ntfs_attrtontvattr(struct ntfsmount *ntmp, struct ntvattr **rvapp,
524 struct attr *rap)
525 {
526 int error, i;
527 struct ntvattr *vap;
528
529 error = 0;
530 *rvapp = NULL;
531
532 MALLOC(vap, struct ntvattr *, sizeof(struct ntvattr),
533 M_NTFSNTVATTR, M_WAITOK | M_ZERO);
534 vap->va_ip = NULL;
535 vap->va_flag = rap->a_hdr.a_flag;
536 vap->va_type = rap->a_hdr.a_type;
537 vap->va_compression = rap->a_hdr.a_compression;
538 vap->va_index = rap->a_hdr.a_index;
539
540 ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
541
542 vap->va_namelen = rap->a_hdr.a_namelen;
543 if (rap->a_hdr.a_namelen) {
544 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
545 ddprintf((", name:["));
546 for (i = 0; i < vap->va_namelen; i++) {
547 vap->va_name[i] = unp[i];
548 ddprintf(("%c", vap->va_name[i]));
549 }
550 ddprintf(("]"));
551 }
552 if (vap->va_flag & NTFS_AF_INRUN) {
553 ddprintf((", nonres."));
554 vap->va_datalen = rap->a_nr.a_datalen;
555 vap->va_allocated = rap->a_nr.a_allocated;
556 vap->va_vcnstart = rap->a_nr.a_vcnstart;
557 vap->va_vcnend = rap->a_nr.a_vcnend;
558 vap->va_compressalg = rap->a_nr.a_compressalg;
559 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
560 &(vap->va_vruncnt),
561 (caddr_t) rap + rap->a_nr.a_dataoff);
562 } else {
563 vap->va_compressalg = 0;
564 ddprintf((", res."));
565 vap->va_datalen = rap->a_r.a_datalen;
566 vap->va_allocated = rap->a_r.a_datalen;
567 vap->va_vcnstart = 0;
568 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
569 MALLOC(vap->va_datap, caddr_t, vap->va_datalen,
570 M_NTFSRDATA, M_WAITOK);
571 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
572 rap->a_r.a_datalen);
573 }
574 ddprintf((", len: %d", vap->va_datalen));
575
576 if (error)
577 FREE(vap, M_NTFSNTVATTR);
578 else
579 *rvapp = vap;
580
581 ddprintf(("\n"));
582
583 return (error);
584 }
585
586 /*
587 * Expand run into more utilizable and more memory eating format.
588 */
589 int
590 ntfs_runtovrun(cn_t **rcnp, cn_t **rclp, u_long *rcntp, u_int8_t *run)
591 {
592 u_int32_t off;
593 u_int32_t sz, i;
594 cn_t *cn;
595 cn_t *cl;
596 u_long cnt;
597 cn_t prev;
598 cn_t tmp;
599
600 off = 0;
601 cnt = 0;
602 i = 0;
603 while (run[off]) {
604 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
605 cnt++;
606 }
607 MALLOC(cn, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
608 MALLOC(cl, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
609
610 off = 0;
611 cnt = 0;
612 prev = 0;
613 while (run[off]) {
614
615 sz = run[off++];
616 cl[cnt] = 0;
617
618 for (i = 0; i < (sz & 0xF); i++)
619 cl[cnt] += (u_int32_t) run[off++] << (i << 3);
620
621 sz >>= 4;
622 if (run[off + sz - 1] & 0x80) {
623 tmp = ((u_int64_t) - 1) << (sz << 3);
624 for (i = 0; i < sz; i++)
625 tmp |= (u_int64_t) run[off++] << (i << 3);
626 } else {
627 tmp = 0;
628 for (i = 0; i < sz; i++)
629 tmp |= (u_int64_t) run[off++] << (i << 3);
630 }
631 if (tmp)
632 prev = cn[cnt] = prev + tmp;
633 else
634 cn[cnt] = tmp;
635
636 cnt++;
637 }
638 *rcnp = cn;
639 *rclp = cl;
640 *rcntp = cnt;
641 return (0);
642 }
643
644 /*
645 * Compare unicode and ascii string case insens.
646 */
647 static int
648 ntfs_uastricmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
649 const char *astr, size_t astrlen)
650 {
651 int len;
652 size_t i, j, mbstrlen = astrlen;
653 int res;
654 wchar wc;
655
656 if (ntmp->ntm_ic_l2u) {
657 for (i = 0, j = 0; i < ustrlen && j < astrlen; i++, j++) {
658 if (j < astrlen -1) {
659 wc = (wchar)astr[j]<<8 | (astr[j+1]&0xFF);
660 len = 2;
661 } else {
662 wc = (wchar)astr[j]<<8 & 0xFF00;
663 len = 1;
664 }
665 res = ((int) NTFS_TOUPPER(ustr[i])) -
666 ((int)NTFS_TOUPPER(NTFS_82U(wc, &len)));
667 j += len - 1;
668 mbstrlen -= len - 1;
669
670 if (res)
671 return res;
672 }
673 } else {
674 /*
675 * We use NTFS_82U(NTFS_U28(c)) to get rid of unicode
676 * symbols not covered by translation table
677 */
678 for (i = 0; i < ustrlen && i < astrlen; i++) {
679 res = ((int) NTFS_TOUPPER(NTFS_82U(NTFS_U28(ustr[i]), &len))) -
680 ((int)NTFS_TOUPPER(NTFS_82U((wchar)astr[i], &len)));
681 if (res)
682 return res;
683 }
684 }
685 return (ustrlen - mbstrlen);
686 }
687
688 /*
689 * Compare unicode and ascii string case sens.
690 */
691 static int
692 ntfs_uastrcmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
693 const char *astr, size_t astrlen)
694 {
695 char u, l;
696 size_t i, j, mbstrlen = astrlen;
697 int res;
698 wchar wc;
699
700 for (i = 0, j = 0; (i < ustrlen) && (j < astrlen); i++, j++) {
701 res = 0;
702 wc = NTFS_U28(ustr[i]);
703 u = (char)(wc>>8);
704 l = (char)wc;
705 if (u != '\0' && j < astrlen -1) {
706 res = (int) (u - astr[j++]);
707 mbstrlen--;
708 }
709 res = (res<<8) + (int) (l - astr[j]);
710 if (res)
711 return res;
712 }
713 return (ustrlen - mbstrlen);
714 }
715
716 /*
717 * Search fnode in ntnode, if not found allocate and preinitialize.
718 *
719 * ntnode should be locked on entry.
720 */
721 int
722 ntfs_fget(struct ntfsmount *ntmp, struct ntnode *ip, int attrtype,
723 char *attrname, struct fnode **fpp)
724 {
725 struct fnode *fp;
726
727 dprintf(("ntfs_fget: ino: %"PRId64", attrtype: 0x%x, attrname: %s\n",
728 ip->i_number,attrtype, attrname?attrname:""));
729 *fpp = NULL;
730 for (fp = ip->i_fnlist.lh_first; fp != NULL; fp = fp->f_fnlist.le_next){
731 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
732 fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
733
734 if ((attrtype == fp->f_attrtype) &&
735 ((!attrname && !fp->f_attrname) ||
736 (attrname && fp->f_attrname &&
737 !strcmp(attrname,fp->f_attrname)))){
738 dprintf(("ntfs_fget: found existed: %p\n",fp));
739 *fpp = fp;
740 }
741 }
742
743 if (*fpp)
744 return (0);
745
746 MALLOC(fp, struct fnode *, sizeof(struct fnode), M_NTFSFNODE,
747 M_WAITOK | M_ZERO);
748 dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
749
750 fp->f_ip = ip;
751 if (attrname) {
752 fp->f_flag |= FN_AATTRNAME;
753 MALLOC(fp->f_attrname, char *, strlen(attrname)+1, M_TEMP, M_WAITOK);
754 strcpy(fp->f_attrname, attrname);
755 } else
756 fp->f_attrname = NULL;
757 fp->f_attrtype = attrtype;
758
759 ntfs_ntref(ip);
760
761 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
762
763 *fpp = fp;
764
765 return (0);
766 }
767
768 /*
769 * Deallocate fnode, remove it from ntnode's fnode list.
770 *
771 * ntnode should be locked.
772 */
773 void
774 ntfs_frele(struct fnode *fp)
775 {
776 struct ntnode *ip = FTONT(fp);
777
778 dprintf(("ntfs_frele: fnode: %p for %"PRId64": %p\n", fp, ip->i_number, ip));
779
780 dprintf(("ntfs_frele: deallocating fnode\n"));
781 LIST_REMOVE(fp,f_fnlist);
782 if (fp->f_flag & FN_AATTRNAME)
783 FREE(fp->f_attrname, M_TEMP);
784 if (fp->f_dirblbuf)
785 FREE(fp->f_dirblbuf, M_NTFSDIR);
786 FREE(fp, M_NTFSFNODE);
787 ntfs_ntrele(ip);
788 }
789
790 /*
791 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME],
792 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
793 * If $ATTR_TYPE nott specifed, ATTR_A_DATA assumed.
794 */
795 static int
796 ntfs_ntlookupattr(struct ntfsmount *ntmp, const char *name, int namelen,
797 int *attrtype, char **attrname)
798 {
799 const char *sys;
800 size_t syslen, i;
801 struct ntvattrdef *adp;
802
803 if (namelen == 0)
804 return (0);
805
806 if (name[0] == '$') {
807 sys = name;
808 for (syslen = 0; syslen < namelen; syslen++) {
809 if(sys[syslen] == ':') {
810 name++;
811 namelen--;
812 break;
813 }
814 }
815 name += syslen;
816 namelen -= syslen;
817
818 adp = ntmp->ntm_ad;
819 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
820 if (syslen != adp->ad_namelen ||
821 strncmp(sys, adp->ad_name, syslen) != 0)
822 continue;
823
824 *attrtype = adp->ad_type;
825 goto out;
826 }
827 return (ENOENT);
828 } else
829 *attrtype = NTFS_A_DATA;
830
831 out:
832 if (namelen) {
833 MALLOC((*attrname), char *, namelen, M_TEMP, M_WAITOK);
834 memcpy((*attrname), name, namelen);
835 (*attrname)[namelen] = '\0';
836 }
837
838 return (0);
839 }
840
841 /*
842 * Lookup specifed node for filename, matching cnp,
843 * return fnode filled.
844 */
845 int
846 ntfs_ntlookupfile(struct ntfsmount *ntmp, struct vnode *vp,
847 struct componentname *cnp, struct vnode **vpp)
848 {
849 struct fnode *fp = VTOF(vp);
850 struct ntnode *ip = FTONT(fp);
851 struct ntvattr *vap; /* Root attribute */
852 cn_t cn; /* VCN in current attribute */
853 caddr_t rdbuf; /* Buffer to read directory's blocks */
854 u_int32_t blsize;
855 u_int32_t rdsize; /* Length of data to read from current block */
856 struct attr_indexentry *iep;
857 int error, res, anamelen, fnamelen;
858 const char *fname,*aname;
859 u_int32_t aoff;
860 int attrtype = NTFS_A_DATA;
861 char *attrname = NULL;
862 struct fnode *nfp;
863 struct vnode *nvp;
864 enum vtype f_type;
865
866 error = ntfs_ntget(ip);
867 if (error)
868 return (error);
869
870 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
871 if (error || (vap->va_flag & NTFS_AF_INRUN))
872 return (ENOTDIR);
873
874 blsize = vap->va_a_iroot->ir_size;
875 rdsize = vap->va_datalen;
876
877 /*
878 * Divide file name into: foofilefoofilefoofile[:attrspec]
879 * Store like this: fname:fnamelen [aname:anamelen]
880 */
881 fname = cnp->cn_nameptr;
882 aname = NULL;
883 anamelen = 0;
884 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
885 if(fname[fnamelen] == ':') {
886 aname = fname + fnamelen + 1;
887 anamelen = cnp->cn_namelen - fnamelen - 1;
888 dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
889 fname, fnamelen, aname, anamelen));
890 break;
891 }
892
893 dprintf(("ntfs_ntlookupfile: blksz: %d, rdsz: %d\n", blsize, rdsize));
894
895 MALLOC(rdbuf, caddr_t, blsize, M_TEMP, M_WAITOK);
896
897 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
898 0, rdsize, rdbuf, NULL);
899 if (error)
900 goto fail;
901
902 aoff = sizeof(struct attr_indexroot);
903
904 do {
905 iep = (struct attr_indexentry *) (rdbuf + aoff);
906
907 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
908 aoff += iep->reclen,
909 iep = (struct attr_indexentry *) (rdbuf + aoff))
910 {
911 ddprintf(("scan: %d, %d\n",
912 (u_int32_t) iep->ie_number,
913 (u_int32_t) iep->ie_fnametype));
914
915 /* check the name - the case-insensitible check
916 * has to come first, to break from this for loop
917 * if needed, so we can dive correctly */
918 res = NTFS_UASTRICMP(iep->ie_fname, iep->ie_fnamelen,
919 fname, fnamelen);
920 if (res > 0) break;
921 if (res < 0) continue;
922
923 if (iep->ie_fnametype == 0 ||
924 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
925 {
926 res = NTFS_UASTRCMP(iep->ie_fname,
927 iep->ie_fnamelen, fname, fnamelen);
928 if (res != 0) continue;
929 }
930
931 if (aname) {
932 error = ntfs_ntlookupattr(ntmp,
933 aname, anamelen,
934 &attrtype, &attrname);
935 if (error)
936 goto fail;
937 }
938
939 /* Check if we've found ourself */
940 if ((iep->ie_number == ip->i_number) &&
941 (attrtype == fp->f_attrtype) &&
942 ((!attrname && !fp->f_attrname) ||
943 (attrname && fp->f_attrname &&
944 !strcmp(attrname, fp->f_attrname))))
945 {
946 vref(vp);
947 *vpp = vp;
948 error = 0;
949 goto fail;
950 }
951
952 /* vget node, but don't load it */
953 error = ntfs_vgetex(ntmp->ntm_mountp,
954 iep->ie_number, attrtype, attrname,
955 LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
956 curthread, &nvp);
957
958 /* free the buffer returned by ntfs_ntlookupattr() */
959 if (attrname) {
960 FREE(attrname, M_TEMP);
961 attrname = NULL;
962 }
963
964 if (error)
965 goto fail;
966
967 nfp = VTOF(nvp);
968
969 if (nfp->f_flag & FN_VALID) {
970 *vpp = nvp;
971 goto fail;
972 }
973
974 nfp->f_fflag = iep->ie_fflag;
975 nfp->f_pnumber = iep->ie_fpnumber;
976 nfp->f_times = iep->ie_ftimes;
977
978 if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
979 (nfp->f_attrtype == NTFS_A_DATA) &&
980 (nfp->f_attrname == NULL))
981 f_type = VDIR;
982 else
983 f_type = VREG;
984
985 nvp->v_type = f_type;
986
987 if ((nfp->f_attrtype == NTFS_A_DATA) &&
988 (nfp->f_attrname == NULL))
989 {
990 /* Opening default attribute */
991 nfp->f_size = iep->ie_fsize;
992 nfp->f_allocated = iep->ie_fallocated;
993 nfp->f_flag |= FN_PRELOADED;
994 } else {
995 error = ntfs_filesize(ntmp, nfp,
996 &nfp->f_size, &nfp->f_allocated);
997 if (error) {
998 vput(nvp);
999 goto fail;
1000 }
1001 }
1002 nfp->f_flag &= ~FN_VALID;
1003
1004 /*
1005 * Normal files use the buffer cache
1006 */
1007 if (nvp->v_type == VREG)
1008 vinitvmio(nvp, nfp->f_size, PAGE_SIZE, -1);
1009 *vpp = nvp;
1010 goto fail;
1011 }
1012
1013 /* Dive if possible */
1014 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
1015 dprintf(("ntfs_ntlookupfile: diving\n"));
1016
1017 cn = *(cn_t *) (rdbuf + aoff +
1018 iep->reclen - sizeof(cn_t));
1019 rdsize = blsize;
1020
1021 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
1022 ntfs_cntob(cn), rdsize, rdbuf, NULL);
1023 if (error)
1024 goto fail;
1025
1026 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1027 rdbuf, rdsize);
1028 if (error)
1029 goto fail;
1030
1031 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
1032 0x18);
1033 } else {
1034 dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
1035 error = ENOENT;
1036 break;
1037 }
1038 } while (1);
1039
1040 dprintf(("finish\n"));
1041
1042 fail:
1043 if (attrname) FREE(attrname, M_TEMP);
1044 ntfs_ntvattrrele(vap);
1045 ntfs_ntput(ip);
1046 FREE(rdbuf, M_TEMP);
1047 return (error);
1048 }
1049
1050 /*
1051 * Check if name type is permitted to show.
1052 */
1053 int
1054 ntfs_isnamepermitted(struct ntfsmount *ntmp, struct attr_indexentry *iep)
1055 {
1056 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
1057 return 1;
1058
1059 switch (iep->ie_fnametype) {
1060 case 2:
1061 ddprintf(("ntfs_isnamepermitted: skiped DOS name\n"));
1062 return 0;
1063 case 0: case 1: case 3:
1064 return 1;
1065 default:
1066 kprintf("ntfs_isnamepermitted: " \
1067 "WARNING! Unknown file name type: %d\n",
1068 iep->ie_fnametype);
1069 break;
1070 }
1071 return 0;
1072 }
1073
1074 /*
1075 * Read ntfs dir like stream of attr_indexentry, not like btree of them.
1076 * This is done by scaning $BITMAP:$I30 for busy clusters and reading them.
1077 * Ofcouse $INDEX_ROOT:$I30 is read before. Last read values are stored in
1078 * fnode, so we can skip toward record number num almost immediatly.
1079 * Anyway this is rather slow routine. The problem is that we don't know
1080 * how many records are there in $INDEX_ALLOCATION:$I30 block.
1081 */
1082 int
1083 ntfs_ntreaddir(struct ntfsmount *ntmp, struct fnode *fp,
1084 u_int32_t num, struct attr_indexentry **riepp)
1085 {
1086 struct ntnode *ip = FTONT(fp);
1087 struct ntvattr *vap = NULL; /* IndexRoot attribute */
1088 struct ntvattr *bmvap = NULL; /* BitMap attribute */
1089 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */
1090 caddr_t rdbuf; /* Buffer to read directory's blocks */
1091 u_char *bmp = NULL; /* Bitmap */
1092 u_int32_t blsize; /* Index allocation size (2048) */
1093 u_int32_t rdsize; /* Length of data to read */
1094 u_int32_t attrnum; /* Current attribute type */
1095 u_int32_t cpbl = 1; /* Clusters per directory block */
1096 u_int32_t blnum;
1097 struct attr_indexentry *iep;
1098 int error = ENOENT;
1099 u_int32_t aoff, cnum;
1100
1101 dprintf(("ntfs_ntreaddir: read ino: %"PRId64", num: %d\n", ip->i_number, num));
1102 error = ntfs_ntget(ip);
1103 if (error)
1104 return (error);
1105
1106 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
1107 if (error)
1108 return (ENOTDIR);
1109
1110 if (fp->f_dirblbuf == NULL) {
1111 fp->f_dirblsz = vap->va_a_iroot->ir_size;
1112 MALLOC(fp->f_dirblbuf, caddr_t,
1113 max(vap->va_datalen,fp->f_dirblsz), M_NTFSDIR, M_WAITOK);
1114 }
1115
1116 blsize = fp->f_dirblsz;
1117 rdbuf = fp->f_dirblbuf;
1118
1119 dprintf(("ntfs_ntreaddir: rdbuf: 0x%p, blsize: %d\n", rdbuf, blsize));
1120
1121 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
1122 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
1123 0, &bmvap);
1124 if (error) {
1125 error = ENOTDIR;
1126 goto fail;
1127 }
1128 MALLOC(bmp, u_char *, bmvap->va_datalen, M_TEMP, M_WAITOK);
1129 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
1130 bmvap->va_datalen, bmp, NULL);
1131 if (error)
1132 goto fail;
1133
1134 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
1135 0, &iavap);
1136 if (error) {
1137 error = ENOTDIR;
1138 goto fail;
1139 }
1140 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
1141 dprintf(("ntfs_ntreaddir: indexalloc: %d, cpbl: %d\n",
1142 iavap->va_datalen, cpbl));
1143 } else {
1144 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
1145 iavap = bmvap = NULL;
1146 bmp = NULL;
1147 }
1148
1149 /* Try use previous values */
1150 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
1151 attrnum = fp->f_lastdattr;
1152 aoff = fp->f_lastdoff;
1153 blnum = fp->f_lastdblnum;
1154 cnum = fp->f_lastdnum;
1155 } else {
1156 attrnum = NTFS_A_INDXROOT;
1157 aoff = sizeof(struct attr_indexroot);
1158 blnum = 0;
1159 cnum = 0;
1160 }
1161
1162 do {
1163 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
1164 attrnum, (u_int32_t) blnum, cnum, num, aoff));
1165 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
1166 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
1167 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
1168 if (error)
1169 goto fail;
1170
1171 if (attrnum == NTFS_A_INDX) {
1172 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1173 rdbuf, rdsize);
1174 if (error)
1175 goto fail;
1176 }
1177 if (aoff == 0)
1178 aoff = (attrnum == NTFS_A_INDX) ?
1179 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
1180 sizeof(struct attr_indexroot);
1181
1182 iep = (struct attr_indexentry *) (rdbuf + aoff);
1183 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
1184 aoff += iep->reclen,
1185 iep = (struct attr_indexentry *) (rdbuf + aoff))
1186 {
1187 if (!ntfs_isnamepermitted(ntmp, iep)) continue;
1188
1189 if (cnum >= num) {
1190 fp->f_lastdnum = cnum;
1191 fp->f_lastdoff = aoff;
1192 fp->f_lastdblnum = blnum;
1193 fp->f_lastdattr = attrnum;
1194
1195 *riepp = iep;
1196
1197 error = 0;
1198 goto fail;
1199 }
1200 cnum++;
1201 }
1202
1203 if (iavap) {
1204 if (attrnum == NTFS_A_INDXROOT)
1205 blnum = 0;
1206 else
1207 blnum++;
1208
1209 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
1210 if (bmp[blnum >> 3] & (1 << (blnum & 3)))
1211 break;
1212 blnum++;
1213 }
1214
1215 attrnum = NTFS_A_INDX;
1216 aoff = 0;
1217 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
1218 break;
1219 dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
1220 }
1221 } while (iavap);
1222
1223 *riepp = NULL;
1224 fp->f_lastdnum = 0;
1225
1226 fail:
1227 if (vap)
1228 ntfs_ntvattrrele(vap);
1229 if (bmvap)
1230 ntfs_ntvattrrele(bmvap);
1231 if (iavap)
1232 ntfs_ntvattrrele(iavap);
1233 if (bmp)
1234 FREE(bmp, M_TEMP);
1235 ntfs_ntput(ip);
1236 return (error);
1237 }
1238
1239 /*
1240 * Convert NTFS times that are in 100 ns units and begins from
1241 * 1601 Jan 1 into unix times.
1242 */
1243 struct timespec
1244 ntfs_nttimetounix(u_int64_t nt)
1245 {
1246 struct timespec t;
1247
1248 /* WindowNT times are in 100 ns and from 1601 Jan 1 */
1249 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
1250 t.tv_sec = nt / (1000 * 1000 * 10) -
1251 369LL * 365LL * 24LL * 60LL * 60LL -
1252 89LL * 1LL * 24LL * 60LL * 60LL;
1253 return (t);
1254 }
1255
1256 /*
1257 * Get file times from NTFS_A_NAME attribute.
1258 */
1259 int
1260 ntfs_times(struct ntfsmount *ntmp, struct ntnode *ip, ntfs_times_t *tm)
1261 {
1262 struct ntvattr *vap;
1263 int error;
1264
1265 dprintf(("ntfs_times: ino: %"PRId64"...\n", ip->i_number));
1266
1267 error = ntfs_ntget(ip);
1268 if (error)
1269 return (error);
1270
1271 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
1272 if (error) {
1273 ntfs_ntput(ip);
1274 return (error);
1275 }
1276 *tm = vap->va_a_name->n_times;
1277 ntfs_ntvattrrele(vap);
1278 ntfs_ntput(ip);
1279
1280 return (0);
1281 }
1282
1283 /*
1284 * Get file sizes from corresponding attribute.
1285 *
1286 * ntnode under fnode should be locked.
1287 */
1288 int
1289 ntfs_filesize(struct ntfsmount *ntmp, struct fnode *fp, u_int64_t *size,
1290 u_int64_t *bytes)
1291 {
1292 struct ntvattr *vap;
1293 struct ntnode *ip = FTONT(fp);
1294 u_int64_t sz, bn;
1295 int error;
1296
1297 dprintf(("ntfs_filesize: ino: %"PRId64"\n", ip->i_number));
1298
1299 error = ntfs_ntvattrget(ntmp, ip,
1300 fp->f_attrtype, fp->f_attrname, 0, &vap);
1301 if (error)
1302 return (error);
1303
1304 bn = vap->va_allocated;
1305 sz = vap->va_datalen;
1306
1307 dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
1308 (u_int32_t) sz, (u_int32_t) bn));
1309
1310 if (size)
1311 *size = sz;
1312 if (bytes)
1313 *bytes = bn;
1314
1315 ntfs_ntvattrrele(vap);
1316
1317 return (0);
1318 }
1319
1320 /*
1321 * This is one of write routine.
1322 */
1323 int
1324 ntfs_writeattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1325 u_int32_t attrnum, char *attrname, off_t roff,
1326 size_t rsize, void *rdata, size_t *initp,
1327 struct uio *uio)
1328 {
1329 size_t init;
1330 int error = 0;
1331 off_t off = roff, left = rsize, towrite;
1332 caddr_t data = rdata;
1333 struct ntvattr *vap;
1334 *initp = 0;
1335
1336 while (left) {
1337 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1338 ntfs_btocn(off), &vap);
1339 if (error)
1340 return (error);
1341 towrite = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1342 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
1343 (u_int32_t) off, (u_int32_t) towrite,
1344 (u_int32_t) vap->va_vcnstart,
1345 (u_int32_t) vap->va_vcnend));
1346 error = ntfs_writentvattr_plain(ntmp, ip, vap,
1347 off - ntfs_cntob(vap->va_vcnstart),
1348 towrite, data, &init, uio);
1349 if (error) {
1350 kprintf("ntfs_writeattr_plain: " \
1351 "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
1352 (u_int32_t) off, (u_int32_t) towrite);
1353 kprintf("ntfs_writeattr_plain: attrib: %d - %d\n",
1354 (u_int32_t) vap->va_vcnstart,
1355 (u_int32_t) vap->va_vcnend);
1356 ntfs_ntvattrrele(vap);
1357 break;
1358 }
1359 ntfs_ntvattrrele(vap);
1360 left -= towrite;
1361 off += towrite;
1362 data = data + towrite;
1363 *initp += init;
1364 }
1365
1366 return (error);
1367 }
1368
1369 /*
1370 * This is one of write routine.
1371 *
1372 * ntnode should be locked.
1373 */
1374 int
1375 ntfs_writentvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1376 struct ntvattr *vap, off_t roff, size_t rsize,
1377 void *rdata, size_t *initp, struct uio *uio)
1378 {
1379 int error = 0;
1380 int off;
1381 int cnt;
1382 cn_t ccn, ccl, cn, left, cl;
1383 caddr_t data = rdata;
1384 struct buf *bp;
1385 size_t tocopy;
1386
1387 *initp = 0;
1388
1389 if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
1390 kprintf("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n");
1391 return ENOTTY;
1392 }
1393
1394 ddprintf(("ntfs_writentvattr_plain: data in run: %ld chains\n",
1395 vap->va_vruncnt));
1396
1397 off = roff;
1398 left = rsize;
1399 ccl = 0;
1400 ccn = 0;
1401 cnt = 0;
1402 for (; left && (cnt < vap->va_vruncnt); cnt++) {
1403 ccn = vap->va_vruncn[cnt];
1404 ccl = vap->va_vruncl[cnt];
1405
1406 ddprintf(("ntfs_writentvattr_plain: " \
1407 "left %d, cn: 0x%x, cl: %d, off: %d\n", \
1408 (u_int32_t) left, (u_int32_t) ccn, \
1409 (u_int32_t) ccl, (u_int32_t) off));
1410
1411 if (ntfs_cntob(ccl) < off) {
1412 off -= ntfs_cntob(ccl);
1413 cnt++;
1414 continue;
1415 }
1416 if (!ccn && ip->i_number != NTFS_BOOTINO)
1417 continue; /* XXX */
1418
1419 ccl -= ntfs_btocn(off);
1420 cn = ccn + ntfs_btocn(off);
1421 off = ntfs_btocnoff(off);
1422
1423 while (left && ccl) {
1424 #if defined(__DragonFly__)
1425 tocopy = min(left,
1426 min(ntfs_cntob(ccl) - off, MAXBSIZE - off));
1427 #else
1428 /* under NetBSD, bread() can read
1429 * maximum one block worth of data */
1430 tocopy = min(left, ntmp->ntm_bps - off);
1431 #endif
1432 cl = ntfs_btocl(tocopy + off);
1433 ddprintf(("ntfs_writentvattr_plain: write: " \
1434 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
1435 (u_int32_t) cn, (u_int32_t) cl,
1436 (u_int32_t) off, (u_int32_t) tocopy,
1437 (u_int32_t) left));
1438 if (off == 0 && tocopy == ntfs_cntob(cl) &&
1439 uio->uio_segflg != UIO_NOCOPY) {
1440 bp = getblk(ntmp->ntm_devvp, ntfs_cntodoff(cn),
1441 ntfs_cntob(cl), 0, 0);
1442 clrbuf(bp);
1443 } else {
1444 error = bread(ntmp->ntm_devvp,
1445 ntfs_cntodoff(cn),
1446 ntfs_cntob(cl), &bp);
1447 if (error) {
1448 brelse(bp);
1449 return (error);
1450 }
1451 }
1452 if (uio)
1453 uiomove(bp->b_data + off, tocopy, uio);
1454 else
1455 memcpy(bp->b_data + off, data, tocopy);
1456 bawrite(bp);
1457 data = data + tocopy;
1458 *initp += tocopy;
1459 off = 0;
1460 left -= tocopy;
1461 cn += cl;
1462 ccl -= cl;
1463 }
1464 }
1465
1466 if (left) {
1467 kprintf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
1468 error = EINVAL;
1469 }
1470
1471 return (error);
1472 }
1473
1474 /*
1475 * This is one of read routines.
1476 *
1477 * ntnode should be locked.
1478 */
1479 int
1480 ntfs_readntvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1481 struct ntvattr *vap, off_t roff, size_t rsize,
1482 void *rdata, size_t *initp, struct uio *uio)
1483 {
1484 int error = 0;
1485 int off;
1486
1487 *initp = 0;
1488 if (vap->va_flag & NTFS_AF_INRUN) {
1489 int cnt;
1490 cn_t ccn, ccl, cn, left, cl;
1491 caddr_t data = rdata;
1492 struct buf *bp;
1493 size_t tocopy;
1494
1495 ddprintf(("ntfs_readntvattr_plain: data in run: %ld chains\n",
1496 vap->va_vruncnt));
1497
1498 off = roff;
1499 left = rsize;
1500 ccl = 0;
1501 ccn = 0;
1502 cnt = 0;
1503 while (left && (cnt < vap->va_vruncnt)) {
1504 ccn = vap->va_vruncn[cnt];
1505 ccl = vap->va_vruncl[cnt];
1506
1507 ddprintf(("ntfs_readntvattr_plain: " \
1508 "left %d, cn: 0x%x, cl: %d, off: %d\n", \
1509 (u_int32_t) left, (u_int32_t) ccn, \
1510 (u_int32_t) ccl, (u_int32_t) off));
1511
1512 if (ntfs_cntob(ccl) < off) {
1513 off -= ntfs_cntob(ccl);
1514 cnt++;
1515 continue;
1516 }
1517 if (ccn || ip->i_number == NTFS_BOOTINO) {
1518 ccl -= ntfs_btocn(off);
1519 cn = ccn + ntfs_btocn(off);
1520 off = ntfs_btocnoff(off);
1521
1522 while (left && ccl) {
1523 #if defined(__DragonFly__)
1524 tocopy = min(left,
1525 min(ntfs_cntob(ccl) - off,
1526 MAXBSIZE - off));
1527 #else
1528 /* under NetBSD, bread() can read
1529 * maximum one block worth of data */
1530 tocopy = min(left,
1531 ntmp->ntm_bps - off);
1532 #endif
1533 cl = ntfs_btocl(tocopy + off);
1534 ddprintf(("ntfs_readntvattr_plain: " \
1535 "read: cn: 0x%x cl: %d, " \
1536 "off: %d len: %d, left: %d\n",
1537 (u_int32_t) cn,
1538 (u_int32_t) cl,
1539 (u_int32_t) off,
1540 (u_int32_t) tocopy,
1541 (u_int32_t) left));
1542 error = bread(ntmp->ntm_devvp,
1543 ntfs_cntodoff(cn),
1544 ntfs_cntob(cl),
1545 &bp);
1546 if (error) {
1547 brelse(bp);
1548 return (error);
1549 }
1550 if (uio) {
1551 uiomove(bp->b_data + off,
1552 tocopy, uio);
1553 } else {
1554 memcpy(data, bp->b_data + off,
1555 tocopy);
1556 }
1557 brelse(bp);
1558 data = data + tocopy;
1559 *initp += tocopy;
1560 off = 0;
1561 left -= tocopy;
1562 cn += cl;
1563 ccl -= cl;
1564 }
1565 } else {
1566 tocopy = min(left, ntfs_cntob(ccl) - off);
1567 ddprintf(("ntfs_readntvattr_plain: "
1568 "hole: ccn: 0x%x ccl: %d, off: %d, " \
1569 " len: %d, left: %d\n",
1570 (u_int32_t) ccn, (u_int32_t) ccl,
1571 (u_int32_t) off, (u_int32_t) tocopy,
1572 (u_int32_t) left));
1573 left -= tocopy;
1574 off = 0;
1575 if (uio) {
1576 size_t remains = tocopy;
1577 for(; remains; remains++)
1578 uiomove("", 1, uio);
1579 } else
1580 bzero(data, tocopy);
1581 data = data + tocopy;
1582 }
1583 cnt++;
1584 }
1585 if (left) {
1586 kprintf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
1587 error = E2BIG;
1588 }
1589 } else {
1590 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
1591 if (uio)
1592 uiomove(vap->va_datap + roff, rsize, uio);
1593 else
1594 memcpy(rdata, vap->va_datap + roff, rsize);
1595 *initp += rsize;
1596 }
1597
1598 return (error);
1599 }
1600
1601 /*
1602 * This is one of read routines.
1603 */
1604 int
1605 ntfs_readattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1606 u_int32_t attrnum, char *attrname, off_t roff,
1607 size_t rsize, void *rdata, size_t * initp,
1608 struct uio *uio)
1609 {
1610 size_t init;
1611 int error = 0;
1612 off_t off = roff, left = rsize, toread;
1613 caddr_t data = rdata;
1614 struct ntvattr *vap;
1615 *initp = 0;
1616
1617 while (left) {
1618 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1619 ntfs_btocn(off), &vap);
1620 if (error)
1621 return (error);
1622 toread = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1623 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
1624 (u_int32_t) off, (u_int32_t) toread,
1625 (u_int32_t) vap->va_vcnstart,
1626 (u_int32_t) vap->va_vcnend));
1627 error = ntfs_readntvattr_plain(ntmp, ip, vap,
1628 off - ntfs_cntob(vap->va_vcnstart),
1629 toread, data, &init, uio);
1630 if (error) {
1631 kprintf("ntfs_readattr_plain: " \
1632 "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
1633 (u_int32_t) off, (u_int32_t) toread);
1634 kprintf("ntfs_readattr_plain: attrib: %d - %d\n",
1635 (u_int32_t) vap->va_vcnstart,
1636 (u_int32_t) vap->va_vcnend);
1637 ntfs_ntvattrrele(vap);
1638 break;
1639 }
1640 ntfs_ntvattrrele(vap);
1641 left -= toread;
1642 off += toread;
1643 data = data + toread;
1644 *initp += init;
1645 }
1646
1647 return (error);
1648 }
1649
1650 /*
1651 * This is one of read routines.
1652 */
1653 int
1654 ntfs_readattr(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t attrnum,
1655 char *attrname, off_t roff, size_t rsize, void *rdata,
1656 struct uio *uio)
1657 {
1658 int error = 0;
1659 struct ntvattr *vap;
1660 size_t init;
1661
1662 ddprintf(("ntfs_readattr: reading %"PRId64": 0x%x, from %d size %d bytes\n",
1663 ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
1664
1665 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
1666 if (error)
1667 return (error);
1668
1669 if ((roff > vap->va_datalen) ||
1670 (roff + rsize > vap->va_datalen)) {
1671 ddprintf(("ntfs_readattr: offset too big\n"));
1672 ntfs_ntvattrrele(vap);
1673 return (E2BIG);
1674 }
1675 if (vap->va_compression && vap->va_compressalg) {
1676 u_int8_t *cup;
1677 u_int8_t *uup;
1678 off_t off, left = rsize, tocopy;
1679 caddr_t data = rdata;
1680 cn_t cn;
1681
1682 ddprintf(("ntfs_ntreadattr: compression: %d\n",
1683 vap->va_compressalg));
1684
1685 MALLOC(cup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
1686 M_NTFSDECOMP, M_WAITOK);
1687 MALLOC(uup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
1688 M_NTFSDECOMP, M_WAITOK);
1689
1690 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
1691 off = roff - ntfs_cntob(cn);
1692
1693 while (left) {
1694 error = ntfs_readattr_plain(ntmp, ip, attrnum,
1695 attrname, ntfs_cntob(cn),
1696 ntfs_cntob(NTFS_COMPUNIT_CL),
1697 cup, &init, NULL);
1698 if (error)
1699 break;
1700
1701 tocopy = min(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
1702
1703 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
1704 if (uio)
1705 uiomove(cup + off, tocopy, uio);
1706 else
1707 memcpy(data, cup + off, tocopy);
1708 } else if (init == 0) {
1709 if (uio) {
1710 size_t remains = tocopy;
1711 for(; remains; remains--)
1712 uiomove("", 1, uio);
1713 }
1714 else
1715 bzero(data, tocopy);
1716 } else {
1717 error = ntfs_uncompunit(ntmp, uup, cup);
1718 if (error)
1719 break;
1720 if (uio)
1721 uiomove(uup + off, tocopy, uio);
1722 else
1723 memcpy(data, uup + off, tocopy);
1724 }
1725
1726 left -= tocopy;
1727 data = data + tocopy;
1728 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
1729 cn += NTFS_COMPUNIT_CL;
1730 }
1731
1732 FREE(uup, M_NTFSDECOMP);
1733 FREE(cup, M_NTFSDECOMP);
1734 } else
1735 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
1736 roff, rsize, rdata, &init, uio);
1737 ntfs_ntvattrrele(vap);
1738 return (error);
1739 }
1740
1741 #if UNUSED_CODE
1742 int
1743 ntfs_parserun(cn_t *cn, cn_t *cl, u_int8_t *run, u_long len, u_long *off)
1744 {
1745 u_int8_t sz;
1746 int i;
1747
1748 if (NULL == run) {
1749 kprintf("ntfs_parsetun: run == NULL\n");
1750 return (EINVAL);
1751 }
1752 sz = run[(*off)++];
1753 if (0 == sz) {
1754 kprintf("ntfs_parserun: trying to go out of run\n");
1755 return (E2BIG);
1756 }
1757 *cl = 0;
1758 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1759 kprintf("ntfs_parserun: " \
1760 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1761 sz, len, *off);
1762 return (EINVAL);
1763 }
1764 for (i = 0; i < (sz & 0xF); i++)
1765 *cl += (u_int32_t) run[(*off)++] << (i << 3);
1766
1767 sz >>= 4;
1768 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1769 kprintf("ntfs_parserun: " \
1770 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1771 sz, len, *off);
1772 return (EINVAL);
1773 }
1774 for (i = 0; i < (sz & 0xF); i++)
1775 *cn += (u_int32_t) run[(*off)++] << (i << 3);
1776
1777 return (0);
1778 }
1779 #endif
1780
1781 /*
1782 * Process fixup routine on given buffer.
1783 */
1784 int
1785 ntfs_procfixups(struct ntfsmount *ntmp, u_int32_t magic, caddr_t buf,
1786 size_t len)
1787 {
1788 struct fixuphdr *fhp = (struct fixuphdr *) buf;
1789 int i;
1790 u_int16_t fixup;
1791 u_int16_t *fxp;
1792 u_int16_t *cfxp;
1793
1794 if (fhp->fh_magic != magic) {
1795 kprintf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
1796 fhp->fh_magic, magic);
1797 return (EINVAL);
1798 }
1799 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
1800 kprintf("ntfs_procfixups: " \
1801 "bad fixups number: %d for %ld bytes block\n",
1802 fhp->fh_fnum, (long)len); /* XXX kprintf kludge */
1803 return (EINVAL);
1804 }
1805 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
1806 kprintf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
1807 return (EINVAL);
1808 }
1809 fxp = (u_int16_t *) (buf + fhp->fh_foff);
1810 cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
1811 fixup = *fxp++;
1812 for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
1813 if (*cfxp != fixup) {
1814 kprintf("ntfs_procfixups: fixup %d doesn't match\n", i);
1815 return (EINVAL);
1816 }
1817 *cfxp = *fxp;
1818 cfxp = (u_int16_t *)(((caddr_t) cfxp) + ntmp->ntm_bps);
1819 }
1820 return (0);
1821 }
1822
1823 #if UNUSED_CODE
1824 int
1825 ntfs_runtocn(cn_t *cn, struct ntfsmount *ntmp, u_int8_t *run, u_long len,
1826 cn_t vcn)
1827 {
1828 cn_t ccn = 0;
1829 cn_t ccl = 0;
1830 u_long off = 0;
1831 int error = 0;
1832
1833 #if NTFS_DEBUG
1834 int i;
1835 kprintf("ntfs_runtocn: run: 0x%p, %ld bytes, vcn:%ld\n",
1836 run, len, (u_long) vcn);
1837 kprintf("ntfs_runtocn: run: ");
1838 for (i = 0; i < len; i++)
1839 kprintf("0x%02x ", run[i]);
1840 kprintf("\n");
1841 #endif
1842
1843 if (NULL == run) {
1844 kprintf("ntfs_runtocn: run == NULL\n");
1845 return (EINVAL);
1846 }
1847 do {
1848 if (run[off] == 0) {
1849 kprintf("ntfs_runtocn: vcn too big\n");
1850 return (E2BIG);
1851 }
1852 vcn -= ccl;
1853 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
1854 if (error) {
1855 kprintf("ntfs_runtocn: ntfs_parserun failed\n");
1856 return (error);
1857 }
1858 } while (ccl <= vcn);
1859 *cn = ccn + vcn;
1860 return (0);
1861 }
1862 #endif
1863
1864 /*
1865 * this initializes toupper table & dependant variables to be ready for
1866 * later work
1867 */
1868 void
1869 ntfs_toupper_init(void)
1870 {
1871 ntfs_toupper_tab = NULL;
1872 lockinit(&ntfs_toupper_lock, "ntfs_toupper", 0, 0);
1873 ntfs_toupper_usecount = 0;
1874 }
1875
1876 /*
1877 * if the ntfs_toupper_tab[] is filled already, just raise use count;
1878 * otherwise read the data from the filesystem we are currently mounting
1879 */
1880 int
1881 ntfs_toupper_use(struct mount *mp, struct ntfsmount *ntmp)
1882 {
1883 int error = 0;
1884 struct vnode *vp;
1885
1886 /* get exclusive access */
1887 LOCKMGR(&ntfs_toupper_lock, LK_EXCLUSIVE);
1888
1889 /* only read the translation data from a file if it hasn't been
1890 * read already */
1891 if (ntfs_toupper_tab)
1892 goto out;
1893
1894 /*
1895 * Read in Unicode lowercase -> uppercase translation file.
1896 * XXX for now, just the first 256 entries are used anyway,
1897 * so don't bother reading more
1898 */
1899 MALLOC(ntfs_toupper_tab, wchar *, 65536 * sizeof(wchar),
1900 M_NTFSRDATA, M_WAITOK);
1901
1902 if ((error = VFS_VGET(mp, NULL, NTFS_UPCASEINO, &vp)))
1903 goto out;
1904 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
1905 0, 65536*sizeof(wchar), (char *) ntfs_toupper_tab, NULL);
1906 vput(vp);
1907
1908 out:
1909 ntfs_toupper_usecount++;
1910 LOCKMGR(&ntfs_toupper_lock, LK_RELEASE);
1911 return (error);
1912 }
1913
1914 /*
1915 * lower the use count and if it reaches zero, free the memory
1916 * tied by toupper table
1917 */
1918 void
1919 ntfs_toupper_unuse(void)
1920 {
1921 /* get exclusive access */
1922 LOCKMGR(&ntfs_toupper_lock, LK_EXCLUSIVE);
1923
1924 ntfs_toupper_usecount--;
1925 if (ntfs_toupper_usecount == 0) {
1926 FREE(ntfs_toupper_tab, M_NTFSRDATA);
1927 ntfs_toupper_tab = NULL;
1928 }
1929 #ifdef DIAGNOSTIC
1930 else if (ntfs_toupper_usecount < 0) {
1931 panic("ntfs_toupper_unuse(): use count negative: %d\n",
1932 ntfs_toupper_usecount);
1933 }
1934 #endif
1935
1936 /* release the lock */
1937 LOCKMGR(&ntfs_toupper_lock, LK_RELEASE);
1938 }
1939
1940 int
1941 ntfs_u28_init(struct ntfsmount *ntmp, wchar *u2w, char *cs_local,
1942 char *cs_ntfs)
1943 {
1944 char ** u28;
1945 int i, j, h, l;
1946
1947 if (ntfs_iconv && cs_local) {
1948 ntfs_iconv->open(cs_local, cs_ntfs, &ntmp->ntm_ic_u2l);
1949 return (0);
1950 }
1951
1952 MALLOC(u28, char **, 256 * sizeof(char*), M_TEMP, M_WAITOK | M_ZERO);
1953
1954 for (i=0; i<256; i++) {
1955 h = (u2w[i] >> 8) & 0xFF;
1956 l = (u2w[i]) &0xFF;
1957
1958 if (u28[h] == NULL) {
1959 MALLOC(u28[h], char *, 256 * sizeof(char), M_TEMP, M_WAITOK);
1960 for (j=0; j<256; j++)
1961 u28[h][j] = '_';
1962 }
1963
1964 u28[h][l] = i & 0xFF;
1965 }
1966
1967 ntmp->ntm_u28 = u28;
1968
1969 return (0);
1970 }
1971
1972 int
1973 ntfs_u28_uninit(struct ntfsmount *ntmp)
1974 {
1975 char ** u28;
1976 int i;
1977
1978 if (ntmp->ntm_u28 == NULL) {
1979 if (ntfs_iconv && ntmp->ntm_ic_u2l) {
1980 ntfs_iconv->close(ntmp->ntm_ic_u2l);
1981 }
1982 return (0);
1983 }
1984
1985 if (ntmp->ntm_u28 == NULL)
1986 return (0);
1987
1988 u28 = ntmp->ntm_u28;
1989
1990 for (i=0; i<256; i++)
1991 if (u28[i] != NULL)
1992 FREE(u28[i], M_TEMP);
1993
1994 FREE(u28, M_TEMP);
1995
1996 return (0);
1997 }
1998
1999 int
2000 ntfs_82u_init(struct ntfsmount *ntmp, char *cs_local, char *cs_ntfs)
2001
2002 {
2003 wchar * _82u;
2004 int i;
2005
2006 if (ntfs_iconv && cs_local) {
2007 ntfs_iconv->open(cs_ntfs, cs_local, &ntmp->ntm_ic_l2u);
2008 return (0);
2009 }
2010
2011 MALLOC(_82u, wchar *, 256 * sizeof(wchar), M_TEMP, M_WAITOK);
2012
2013 for (i=0; i<256; i++)
2014 _82u[i] = i;
2015
2016 ntmp->ntm_82u = _82u;
2017
2018 return (0);
2019 }
2020
2021 int
2022 ntfs_82u_uninit(struct ntfsmount *ntmp)
2023 {
2024 if (ntmp->ntm_82u == NULL) {
2025 if (ntfs_iconv && ntmp->ntm_ic_l2u) {
2026 ntfs_iconv->close(ntmp->ntm_ic_l2u);
2027 }
2028 return (0);
2029 }
2030
2031 FREE(ntmp->ntm_82u, M_TEMP);
2032 return (0);
2033 }
2034
2035 /*
2036 * maps the Unicode char to 8bit equivalent
2037 * XXX currently only gets lower 8bit from the Unicode char
2038 * and substitutes a '_' for it if the result would be '\0';
2039 * something better has to be definitely though out
2040 */
2041 wchar
2042 ntfs_u28(struct ntfsmount *ntmp, wchar wc)
2043 {
2044 char *p, *outp, inbuf[3], outbuf[3];
2045 size_t ilen, olen;
2046
2047 if (ntfs_iconv && ntmp->ntm_ic_u2l) {
2048 ilen = olen = 2;
2049 inbuf[0] = (char)(wc>>8);
2050 inbuf[1] = (char)wc;
2051 inbuf[2] = '\0';
2052 p = inbuf;
2053 outp = outbuf;
2054 ntfs_iconv->convchr(ntmp->ntm_ic_u2l, (const char **)&p, &ilen,
2055 &outp, &olen);
2056 if (olen == 1) {
2057 return ((wchar)(outbuf[0]&0xFF));
2058 } else if (olen == 0) {
2059 return ((wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF)));
2060 }
2061 return ('?');
2062 }
2063
2064 p = ntmp->ntm_u28[(wc>>8)&0xFF];
2065 if (p == NULL)
2066 return ('_');
2067 return (p[wc&0xFF]);
2068 }
2069
2070 wchar
2071 ntfs_82u(struct ntfsmount *ntmp,
2072 wchar wc,
2073 int *len)
2074 {
2075 char *p, *outp, inbuf[3], outbuf[3];
2076 wchar uc;
2077 size_t ilen, olen;
2078
2079 if (ntfs_iconv && ntmp->ntm_ic_l2u) {
2080 ilen = (size_t)*len;
2081 olen = 2;
2082
2083 inbuf[0] = (char)(wc>>8);
2084 inbuf[1] = (char)wc;
2085 inbuf[2] = '\0';
2086 p = inbuf;
2087 outp = outbuf;
2088 ntfs_iconv->convchr(ntmp->ntm_ic_l2u, (const char **)&p, &ilen,
2089 &outp, &olen);
2090 *len -= (int)ilen;
2091 uc = (wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF));
2092
2093 return (uc);
2094 }
2095
2096 if (ntmp->ntm_82u != NULL)
2097 return (ntmp->ntm_82u[wc&0xFF]);
2098
2099 return ('?');
2100 }
DragonFly BSD