1/* $NetBSD: ntfs_subr.c,v 1.61 2015/03/28 19:24:05 maxv Exp $ */
2
3/*-
4 * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * Id: ntfs_subr.c,v 1.4 1999/05/12 09:43:01 semenu Exp
29 */
30
31#include <sys/cdefs.h>
32__KERNEL_RCSID(0, "$NetBSD: ntfs_subr.c,v 1.61 2015/03/28 19:24:05 maxv Exp $");
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/namei.h>
37#include <sys/proc.h>
38#include <sys/kernel.h>
39#include <sys/vnode.h>
40#include <sys/mount.h>
41#include <sys/buf.h>
42#include <sys/file.h>
43#include <sys/malloc.h>
44#include <sys/lock.h>
45#include <sys/kauth.h>
46
47#include <miscfs/specfs/specdev.h>
48
49#include <fs/ntfs/ntfs.h>
50#include <fs/ntfs/ntfsmount.h>
51#include <fs/ntfs/ntfs_inode.h>
52#include <fs/ntfs/ntfs_vfsops.h>
53#include <fs/ntfs/ntfs_subr.h>
54#include <fs/ntfs/ntfs_compr.h>
55#include <fs/ntfs/ntfs_ihash.h>
56
57#ifdef NTFS_DEBUG
58int ntfs_debug = NTFS_DEBUG;
59#endif
60
61MALLOC_JUSTDEFINE(M_NTFSNTVATTR, "NTFS vattr",
62 "NTFS file attribute information");
63MALLOC_JUSTDEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
64MALLOC_JUSTDEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
65MALLOC_JUSTDEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
66
67/* Local struct used in ntfs_ntlookupfile() */
68struct ntfs_lookup_ctx {
69 u_int32_t aoff;
70 u_int32_t rdsize;
71 cn_t cn;
72 struct ntfs_lookup_ctx *prev;
73};
74
75static int ntfs_ntlookupattr(struct ntfsmount *, const char *, int,
76 int *, char **);
77static int ntfs_findvattr(struct ntfsmount *, struct ntnode *,
78 struct ntvattr **, struct ntvattr **, u_int32_t, const char *,
79 size_t, cn_t);
80static int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t,
81 const char *, size_t);
82static int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t,
83 const char *, size_t);
84
85/* table for mapping Unicode chars into uppercase; it's filled upon first
86 * ntfs mount, freed upon last ntfs umount */
87static wchar *ntfs_toupper_tab;
88#define NTFS_U28(ch) ((((ch) & 0xE0) == 0) ? '_' : (ch) & 0xFF)
89#define NTFS_TOUPPER(ch) (ntfs_toupper_tab[(unsigned char)(ch)])
90static kmutex_t ntfs_toupper_lock;
91static signed int ntfs_toupper_usecount;
92
93/* support macro for ntfs_ntvattrget() */
94#define NTFS_AALPCMP(aalp,type,name,namelen) ( \
95 (aalp->al_type == type) && (aalp->al_namelen == namelen) && \
96 !ntfs_uastrcmp(ntmp, aalp->al_name,aalp->al_namelen,name,namelen) )
97
98int
99ntfs_ntvattrrele(struct ntvattr *vap)
100{
101 dprintf(("%s: ino: %llu, type: 0x%x\n", __func__,
102 (unsigned long long)vap->va_ip->i_number, vap->va_type));
103 ntfs_ntrele(vap->va_ip);
104 return (0);
105}
106
107/*
108 * find the attribute in the ntnode
109 */
110static int
111ntfs_findvattr(struct ntfsmount *ntmp, struct ntnode *ip, struct ntvattr **lvapp,
112 struct ntvattr **vapp, u_int32_t type, const char *name, size_t namelen,
113 cn_t vcn)
114{
115 int error;
116 struct ntvattr *vap;
117
118 if ((ip->i_flag & IN_LOADED) == 0) {
119 dprintf(("%s: node not loaded, ino: %llu\n", __func__,
120 (unsigned long long)ip->i_number));
121 error = ntfs_loadntnode(ntmp,ip);
122 if (error) {
123 printf("%s: FAILED TO LOAD INO: %llu\n", __func__,
124 (unsigned long long)ip->i_number);
125 return (error);
126 }
127 }
128
129 *lvapp = NULL;
130 *vapp = NULL;
131 for (vap = ip->i_valist.lh_first; vap; vap = vap->va_list.le_next) {
132 ddprintf(("%s: type: 0x%x, vcn: %qu - %qu\n", __func__,
133 vap->va_type, (long long) vap->va_vcnstart,
134 (long long) vap->va_vcnend));
135 if ((vap->va_type == type) &&
136 (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
137 (vap->va_namelen == namelen) &&
138 (strncmp(name, vap->va_name, namelen) == 0)) {
139 *vapp = vap;
140 ntfs_ntref(vap->va_ip);
141 return (0);
142 }
143 if (vap->va_type == NTFS_A_ATTRLIST)
144 *lvapp = vap;
145 }
146
147 return (-1);
148}
149
150/*
151 * Search attribute specified in ntnode (load ntnode if necessary).
152 * If not found but ATTR_A_ATTRLIST present, read it in and search through.
153 *
154 * ntnode should be locked
155 */
156int
157ntfs_ntvattrget(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t type,
158 const char *name, cn_t vcn, struct ntvattr **vapp)
159{
160 struct ntvattr *lvap = NULL;
161 struct attr_attrlist *aalp;
162 struct attr_attrlist *nextaalp;
163 struct ntnode *newip;
164 void *alpool;
165 size_t namelen, len;
166 int error;
167
168 *vapp = NULL;
169
170 if (name) {
171 dprintf(("%s: ino: %llu, type: 0x%x, name: %s, vcn: %qu\n",
172 __func__, (unsigned long long)ip->i_number, type, name,
173 (long long)vcn));
174 namelen = strlen(name);
175 } else {
176 dprintf(("%s: ino: %llu, type: 0x%x, vcn: %qu\n", __func__,
177 (unsigned long long)ip->i_number, type, (long long)vcn));
178 name = "";
179 namelen = 0;
180 }
181
182 error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
183 if (error >= 0)
184 return (error);
185
186 if (!lvap) {
187 dprintf(("%s: NON-EXISTENT ATTRIBUTE: "
188 "ino: %llu, type: 0x%x, name: %s, vcn: %qu\n", __func__,
189 (unsigned long long)ip->i_number, type, name,
190 (long long)vcn));
191 return (ENOENT);
192 }
193 /* Scan $ATTRIBUTE_LIST for requested attribute */
194 len = lvap->va_datalen;
195 alpool = malloc(len, M_TEMP, M_WAITOK);
196 error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
197 NULL);
198 if (error)
199 goto out;
200
201 aalp = (struct attr_attrlist *) alpool;
202 nextaalp = NULL;
203
204 for (; len > 0; aalp = nextaalp) {
205 KASSERT(aalp != NULL);
206 dprintf(("%s: attrlist: ino: %d, attr: 0x%x, vcn: %qu\n",
207 __func__, aalp->al_inumber, aalp->al_type,
208 (long long) aalp->al_vcnstart));
209
210 if (len > aalp->reclen) {
211 nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
212 } else {
213 nextaalp = NULL;
214 }
215 len -= aalp->reclen;
216
217 if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
218 (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
219 NTFS_AALPCMP(nextaalp, type, name, namelen)))
220 continue;
221
222 dprintf(("%s: attribute in ino: %d\n", __func__,
223 aalp->al_inumber));
224
225 error = ntfs_ntlookup(ntmp, aalp->al_inumber, &newip);
226 if (error) {
227 printf("%s: can't lookup ino %d"
228 " for %" PRId64 " attr %x: error %d\n", __func__,
229 aalp->al_inumber, ip->i_number, type, error);
230 goto out;
231 }
232 /* XXX have to lock ntnode */
233 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
234 type, name, namelen, vcn);
235 ntfs_ntput(newip);
236 if (error == 0)
237 goto out;
238 printf("%s: ATTRLIST ERROR.\n", __func__);
239 break;
240 }
241 error = ENOENT;
242
243 dprintf(("%s: NON-EXISTENT ATTRIBUTE: ino: %llu, type: 0x%x, "
244 "name: %.*s, vcn: %qu\n", __func__,
245 (unsigned long long)ip->i_number, type, (int)namelen,
246 name, (long long)vcn));
247out:
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 */
257int
258ntfs_loadntnode(struct ntfsmount *ntmp, struct ntnode *ip)
259{
260 struct filerec *mfrp;
261 int error, off;
262 struct attr *ap;
263 struct ntvattr *nvap;
264
265 dprintf(("%s: loading ino: %llu\n", __func__,
266 (unsigned long long)ip->i_number));
267
268 mfrp = malloc(ntfs_bntob(ntmp->ntm_bpmftrec), M_TEMP, M_WAITOK);
269
270 if (ip->i_number < NTFS_SYSNODESNUM) {
271 struct buf *bp;
272 daddr_t bn;
273 off_t boff;
274
275 dprintf(("%s: read system node\n", __func__));
276
277 /*
278 * Make sure we always read full cluster to
279 * prevent buffer cache inconsistency.
280 */
281 boff = ntfs_cntob(ntmp->ntm_mftcn) +
282 ntfs_bntob(ntmp->ntm_bpmftrec) * ip->i_number;
283 bn = ntfs_cntobn(ntfs_btocn(boff));
284 off = ntfs_btocnoff(boff);
285
286 error = bread(ntmp->ntm_devvp, bn, ntfs_cntob(1),
287 0, &bp);
288 if (error) {
289 printf("%s: BREAD FAILED\n", __func__);
290 goto out;
291 }
292 memcpy(mfrp, (char *)bp->b_data + off,
293 ntfs_bntob(ntmp->ntm_bpmftrec));
294 bqrelse(bp);
295 } else {
296 struct vnode *vp;
297
298 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
299 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
300 ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
301 ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
302 if (error) {
303 printf("%s: ntfs_readattr failed\n", __func__);
304 goto out;
305 }
306 }
307
308 /* Check if magic and fixups are correct */
309 error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (void *)mfrp,
310 ntfs_bntob(ntmp->ntm_bpmftrec));
311 if (error) {
312 printf("%s: BAD MFT RECORD %d\n", __func__,
313 (u_int32_t) ip->i_number);
314 goto out;
315 }
316
317 dprintf(("%s: load attrs for ino: %llu\n", __func__,
318 (unsigned long long)ip->i_number));
319 off = mfrp->fr_attroff;
320 ap = (struct attr *) ((char *)mfrp + off);
321
322 LIST_INIT(&ip->i_valist);
323
324 while (ap->a_hdr.a_type != -1) {
325 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
326 if (error)
327 break;
328 nvap->va_ip = ip;
329
330 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
331
332 off += ap->a_hdr.reclen;
333 ap = (struct attr *) ((char *)mfrp + off);
334 }
335 if (error) {
336 printf("%s: failed to load attr ino: %llu\n", __func__,
337 (unsigned long long)ip->i_number);
338 goto out;
339 }
340
341 ip->i_mainrec = mfrp->fr_mainrec;
342 ip->i_nlink = mfrp->fr_nlink;
343 ip->i_frflag = mfrp->fr_flags;
344
345 ip->i_flag |= IN_LOADED;
346
347out:
348 free(mfrp, M_TEMP);
349 return (error);
350}
351
352/*
353 * Routine locks ntnode and increase usecount, just opposite of
354 * ntfs_ntput().
355 */
356int
357ntfs_ntget(struct ntnode *ip)
358{
359 dprintf(("%s: get ntnode %llu: %p, usecount: %d\n", __func__,
360 (unsigned long long)ip->i_number, ip, ip->i_usecount));
361
362 mutex_enter(&ip->i_interlock);
363 ip->i_usecount++;
364 while (ip->i_busy != 0) {
365 cv_wait(&ip->i_lock, &ip->i_interlock);
366 }
367 ip->i_busy = 1;
368 mutex_exit(&ip->i_interlock);
369
370 return 0;
371}
372
373/*
374 * Routine search ntnode in hash, if found: lock, inc usecount and return.
375 * If not in hash allocate structure for ntnode, prefill it, lock,
376 * inc count and return.
377 *
378 * ntnode returned locked
379 */
380int
381ntfs_ntlookup(struct ntfsmount *ntmp, ino_t ino, struct ntnode **ipp)
382{
383 struct ntnode *ip;
384
385 dprintf(("%s: looking for ntnode %llu\n", __func__,
386 (unsigned long long)ino));
387
388 if ((*ipp = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
389 ntfs_ntget(*ipp);
390 dprintf(("%s: ntnode %llu: %p, usecount: %d\n", __func__,
391 (unsigned long long)ino, *ipp, (*ipp)->i_usecount));
392 return (0);
393 }
394
395 ip = malloc(sizeof(*ip), M_NTFSNTNODE, M_WAITOK|M_ZERO);
396 ddprintf(("%s: allocating ntnode: %llu: %p\n", __func__,
397 (unsigned long long)ino, ip));
398
399 mutex_enter(&ntfs_hashlock);
400 if ((*ipp = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
401 mutex_exit(&ntfs_hashlock);
402 ntfs_ntget(*ipp);
403 free(ip, M_NTFSNTNODE);
404 dprintf(("%s: ntnode %llu: %p, usecount: %d\n", __func__,
405 (unsigned long long)ino, *ipp, (*ipp)->i_usecount));
406 return (0);
407 }
408
409 /* Generic initialization */
410 ip->i_devvp = ntmp->ntm_devvp;
411 ip->i_dev = ntmp->ntm_dev;
412 ip->i_number = ino;
413 ip->i_mp = ntmp;
414
415 /* init lock and lock the newborn ntnode */
416 cv_init(&ip->i_lock, "ntfslk");
417 mutex_init(&ip->i_interlock, MUTEX_DEFAULT, IPL_NONE);
418 ntfs_ntget(ip);
419
420 ntfs_nthashins(ip);
421
422 mutex_exit(&ntfs_hashlock);
423
424 *ipp = ip;
425
426 dprintf(("%s: ntnode %llu: %p, usecount: %d\n", __func__,
427 (unsigned long long)ino, ip, ip->i_usecount));
428
429 return (0);
430}
431
432/*
433 * Decrement usecount of ntnode and unlock it, if usecount reaches zero,
434 * deallocate ntnode.
435 *
436 * ntnode should be locked on entry, and unlocked on return.
437 */
438void
439ntfs_ntput(struct ntnode *ip)
440{
441 struct ntvattr *vap;
442
443 dprintf(("%s: rele ntnode %llu: %p, usecount: %d\n", __func__,
444 (unsigned long long)ip->i_number, ip, ip->i_usecount));
445
446 mutex_enter(&ip->i_interlock);
447 ip->i_usecount--;
448
449#ifdef DIAGNOSTIC
450 if (ip->i_usecount < 0) {
451 panic("ntfs_ntput: ino: %llu usecount: %d ",
452 (unsigned long long)ip->i_number, ip->i_usecount);
453 }
454#endif
455
456 ip->i_busy = 0;
457 cv_signal(&ip->i_lock);
458 mutex_exit(&ip->i_interlock);
459
460 if (ip->i_usecount == 0) {
461 dprintf(("%s: deallocating ntnode: %llu\n", __func__,
462 (unsigned long long)ip->i_number));
463
464 ntfs_nthashrem(ip);
465
466 while (ip->i_valist.lh_first != NULL) {
467 vap = ip->i_valist.lh_first;
468 LIST_REMOVE(vap,va_list);
469 ntfs_freentvattr(vap);
470 }
471 mutex_destroy(&ip->i_interlock);
472 cv_destroy(&ip->i_lock);
473 free(ip, M_NTFSNTNODE);
474 }
475}
476
477/*
478 * increment usecount of ntnode
479 */
480void
481ntfs_ntref(struct ntnode *ip)
482{
483 mutex_enter(&ip->i_interlock);
484 ip->i_usecount++;
485 mutex_exit(&ip->i_interlock);
486
487 dprintf(("%s: ino %llu, usecount: %d\n", __func__,
488 (unsigned long long)ip->i_number, ip->i_usecount));
489}
490
491/*
492 * Decrement usecount of ntnode.
493 */
494void
495ntfs_ntrele(struct ntnode *ip)
496{
497 dprintf(("%s: rele ntnode %llu: %p, usecount: %d\n", __func__,
498 (unsigned long long)ip->i_number, ip, ip->i_usecount));
499
500 mutex_enter(&ip->i_interlock);
501 ip->i_usecount--;
502
503 if (ip->i_usecount < 0)
504 panic("%s: ino: %llu usecount: %d ", __func__,
505 (unsigned long long)ip->i_number, ip->i_usecount);
506 mutex_exit(&ip->i_interlock);
507}
508
509/*
510 * Deallocate all memory allocated for ntvattr
511 */
512void
513ntfs_freentvattr(struct ntvattr *vap)
514{
515 if (vap->va_flag & NTFS_AF_INRUN) {
516 if (vap->va_vruncn)
517 free(vap->va_vruncn, M_NTFSRUN);
518 if (vap->va_vruncl)
519 free(vap->va_vruncl, M_NTFSRUN);
520 } else {
521 if (vap->va_datap)
522 free(vap->va_datap, M_NTFSRDATA);
523 }
524 free(vap, M_NTFSNTVATTR);
525}
526
527/*
528 * Convert disk image of attribute into ntvattr structure,
529 * runs are expanded also.
530 */
531int
532ntfs_attrtontvattr(struct ntfsmount *ntmp, struct ntvattr **rvapp,
533 struct attr *rap)
534{
535 int error, i;
536 struct ntvattr *vap;
537
538 error = 0;
539 *rvapp = NULL;
540
541 vap = malloc(sizeof(*vap), M_NTFSNTVATTR, M_WAITOK|M_ZERO);
542 vap->va_ip = NULL;
543 vap->va_flag = rap->a_hdr.a_flag;
544 vap->va_type = rap->a_hdr.a_type;
545 vap->va_compression = rap->a_hdr.a_compression;
546 vap->va_index = rap->a_hdr.a_index;
547
548 ddprintf(("%s: type: 0x%x, index: %d", __func__,
549 vap->va_type, vap->va_index));
550
551 vap->va_namelen = rap->a_hdr.a_namelen;
552 if (rap->a_hdr.a_namelen) {
553 wchar *unp = (wchar *)((char *)rap + rap->a_hdr.a_nameoff);
554 ddprintf((", name:["));
555 for (i = 0; i < vap->va_namelen; i++) {
556 vap->va_name[i] = unp[i];
557 ddprintf(("%c", vap->va_name[i]));
558 }
559 ddprintf(("]"));
560 }
561 if (vap->va_flag & NTFS_AF_INRUN) {
562 ddprintf((", nonres."));
563 vap->va_datalen = rap->a_nr.a_datalen;
564 vap->va_allocated = rap->a_nr.a_allocated;
565 vap->va_vcnstart = rap->a_nr.a_vcnstart;
566 vap->va_vcnend = rap->a_nr.a_vcnend;
567 vap->va_compressalg = rap->a_nr.a_compressalg;
568 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
569 &(vap->va_vruncnt),
570 (u_int8_t *) rap + rap->a_nr.a_dataoff);
571 } else {
572 vap->va_compressalg = 0;
573 ddprintf((", res."));
574 vap->va_datalen = rap->a_r.a_datalen;
575 vap->va_allocated = rap->a_r.a_datalen;
576 vap->va_vcnstart = 0;
577 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
578 vap->va_datap = malloc(vap->va_datalen, M_NTFSRDATA, M_WAITOK);
579 memcpy(vap->va_datap, (char *)rap + rap->a_r.a_dataoff,
580 rap->a_r.a_datalen);
581 }
582 ddprintf((", len: %qu", (long long)vap->va_datalen));
583
584 if (error)
585 free(vap, M_NTFSNTVATTR);
586 else
587 *rvapp = vap;
588
589 ddprintf(("\n"));
590
591 return (error);
592}
593
594/*
595 * Expand run into more utilizable and more memory eating format.
596 */
597int
598ntfs_runtovrun(cn_t **rcnp, cn_t **rclp, u_long *rcntp, u_int8_t *run)
599{
600 u_int32_t off, sz, i;
601 cn_t *cn, *cl;
602 u_long cnt;
603 cn_t prev, tmp;
604
605 off = 0;
606 cnt = 0;
607 i = 0;
608 while (run[off]) {
609 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
610 cnt++;
611 }
612 cn = malloc(cnt * sizeof(*cn), M_NTFSRUN, M_WAITOK);
613 cl = malloc(cnt * sizeof(*cl), M_NTFSRUN, M_WAITOK);
614
615 off = 0;
616 cnt = 0;
617 prev = 0;
618 while (run[off]) {
619 sz = run[off++];
620 cl[cnt] = 0;
621
622 for (i = 0; i < (sz & 0xF); i++)
623 cl[cnt] += (u_int32_t) run[off++] << (i << 3);
624
625 sz >>= 4;
626 if (run[off + sz - 1] & 0x80) {
627 tmp = ((u_int64_t) - 1) << (sz << 3);
628 for (i = 0; i < sz; i++)
629 tmp |= (u_int64_t) run[off++] << (i << 3);
630 } else {
631 tmp = 0;
632 for (i = 0; i < sz; i++)
633 tmp |= (u_int64_t) run[off++] << (i << 3);
634 }
635 if (tmp)
636 prev = cn[cnt] = prev + tmp;
637 else
638 cn[cnt] = tmp;
639
640 cnt++;
641 }
642 *rcnp = cn;
643 *rclp = cl;
644 *rcntp = cnt;
645 return (0);
646}
647
648/*
649 * Compare unicode and ascii string case insens.
650 */
651static int
652ntfs_uastricmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
653 const char *astr, size_t astrlen)
654{
655 size_t i;
656 int res;
657
658 for (i = 0; i < ustrlen && astrlen > 0; i++) {
659 res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i]),
660 NTFS_TOUPPER((*ntmp->ntm_wget)(&astr, &astrlen)) );
661 if (res)
662 return res;
663 }
664
665 if (i == ustrlen && astrlen == 0)
666 return 0;
667 else if (i == ustrlen)
668 return -1;
669 else
670 return 1;
671}
672
673/*
674 * Compare unicode and ascii string case sens.
675 */
676static int
677ntfs_uastrcmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
678 const char *astr, size_t astrlen)
679{
680 size_t i;
681 int res;
682
683 for (i = 0; (i < ustrlen) && astrlen > 0; i++) {
684 res = (*ntmp->ntm_wcmp)(ustr[i],
685 (*ntmp->ntm_wget)(&astr, &astrlen));
686 if (res)
687 return res;
688 }
689
690 if (i == ustrlen && astrlen == 0)
691 return 0;
692 else if (i == ustrlen)
693 return -1;
694 else
695 return 1;
696}
697
698/*
699 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME],
700 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
701 * If $ATTR_TYPE not specified, ATTR_A_DATA assumed.
702 */
703static int
704ntfs_ntlookupattr(struct ntfsmount *ntmp, const char *name, int namelen,
705 int *attrtype, char **attrname)
706{
707 const char *sys;
708 size_t syslen, i;
709 struct ntvattrdef *adp;
710
711 if (namelen == 0)
712 return (0);
713
714 if (name[0] == '$') {
715 sys = name;
716 for (syslen = 0; syslen < namelen; syslen++) {
717 if (sys[syslen] == ':') {
718 name++;
719 namelen--;
720 break;
721 }
722 }
723 name += syslen;
724 namelen -= syslen;
725
726 adp = ntmp->ntm_ad;
727 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
728 if (syslen != adp->ad_namelen ||
729 strncmp(sys, adp->ad_name, syslen) != 0)
730 continue;
731
732 *attrtype = adp->ad_type;
733 goto out;
734 }
735 return (ENOENT);
736 } else
737 *attrtype = NTFS_A_DATA;
738
739out:
740 if (namelen) {
741 *attrname = malloc(namelen+1, M_TEMP, M_WAITOK);
742 memcpy((*attrname), name, namelen);
743 (*attrname)[namelen] = '\0';
744 }
745
746 return (0);
747}
748
749/*
750 * Lookup specified node for filename, matching cnp,
751 * return referenced vnode with fnode filled.
752 */
753int
754ntfs_ntlookupfile(struct ntfsmount *ntmp, struct vnode *vp,
755 struct componentname *cnp, struct vnode **vpp)
756{
757 struct fnode *fp = VTOF(vp);
758 struct ntnode *ip = FTONT(fp);
759 struct ntvattr *vap = NULL; /* Root attribute */
760 cn_t cn = 0; /* VCN in current attribute */
761 void * rdbuf = NULL; /* Buffer to read directory's blocks */
762 u_int32_t blsize;
763 u_int32_t rdsize; /* Length of data to read from current block */
764 struct attr_indexentry *iep;
765 int error, res, anamelen, fnamelen;
766 const char *fname,*aname;
767 u_int32_t aoff;
768 int attrtype = NTFS_A_DATA;
769 char *attrname = NULL;
770 struct vnode *nvp;
771 int fullscan = 0;
772 struct ntfs_lookup_ctx *lookup_ctx = NULL, *tctx;
773
774 error = ntfs_ntget(ip);
775 if (error)
776 return (error);
777
778 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
779 if (error || (vap->va_flag & NTFS_AF_INRUN)) {
780 error = ENOTDIR;
781 goto fail;
782 }
783
784 /*
785 * Divide file name into: foofilefoofilefoofile[:attrspec]
786 * Store like this: fname:fnamelen [aname:anamelen]
787 */
788 fname = cnp->cn_nameptr;
789 aname = NULL;
790 anamelen = 0;
791 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
792 if (fname[fnamelen] == ':') {
793 aname = fname + fnamelen + 1;
794 anamelen = cnp->cn_namelen - fnamelen - 1;
795 dprintf(("%s: %s (%d), attr: %s (%d)\n", __func__,
796 fname, fnamelen, aname, anamelen));
797 break;
798 }
799
800 blsize = vap->va_a_iroot->ir_size;
801 dprintf(("%s: blksz: %d\n", __func__, blsize));
802 rdbuf = malloc(blsize, M_TEMP, M_WAITOK);
803
804loop:
805 rdsize = vap->va_datalen;
806 dprintf(("%s: rdsz: %d\n", __func__, rdsize));
807
808 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
809 0, rdsize, rdbuf, NULL);
810 if (error)
811 goto fail;
812
813 aoff = sizeof(struct attr_indexroot);
814
815 do {
816 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff);
817
818 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
819 aoff += iep->reclen,
820 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff))
821 {
822 ddprintf(("%s: fscan: %d, %d\n", __func__,
823 (u_int32_t) iep->ie_number,
824 (u_int32_t) iep->ie_fnametype));
825
826 /* check the name - the case-insensitive check
827 * has to come first, to break from this for loop
828 * if needed, so we can dive correctly */
829 res = ntfs_uastricmp(ntmp, iep->ie_fname,
830 iep->ie_fnamelen, fname, fnamelen);
831 if (!fullscan) {
832 if (res > 0)
833 break;
834 if (res < 0)
835 continue;
836 }
837
838 if (iep->ie_fnametype == 0 ||
839 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
840 {
841 res = ntfs_uastrcmp(ntmp, iep->ie_fname,
842 iep->ie_fnamelen, fname, fnamelen);
843 if (res != 0 && !fullscan)
844 continue;
845 }
846
847 /* if we perform full scan, the file does not match
848 * and this is subnode, dive */
849 if (fullscan && res != 0) {
850 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
851 tctx = malloc(sizeof(*tctx), M_TEMP,
852 M_WAITOK);
853 tctx->aoff = aoff + iep->reclen;
854 tctx->rdsize = rdsize;
855 tctx->cn = cn;
856 tctx->prev = lookup_ctx;
857 lookup_ctx = tctx;
858 break;
859 } else
860 continue;
861 }
862
863 if (aname) {
864 error = ntfs_ntlookupattr(ntmp, aname, anamelen,
865 &attrtype, &attrname);
866 if (error)
867 goto fail;
868 }
869
870 /* Check if we've found ourselves */
871 if ((iep->ie_number == ip->i_number) &&
872 (attrtype == fp->f_attrtype) &&
873 !strcmp(attrname ? attrname : "", fp->f_attrname))
874 {
875 vref(vp);
876 *vpp = vp;
877 error = 0;
878 goto fail;
879 }
880
881 /* vget node */
882 error = ntfs_vgetex(ntmp->ntm_mountp, iep->ie_number,
883 attrtype, attrname ? attrname : "", 0, &nvp);
884
885 /* free the buffer returned by ntfs_ntlookupattr() */
886 if (attrname) {
887 free(attrname, M_TEMP);
888 attrname = NULL;
889 }
890
891 if (error)
892 goto fail;
893
894 *vpp = nvp;
895 goto fail;
896 }
897
898 /* Dive if possible */
899 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
900 dprintf(("%s: diving\n", __func__));
901
902 cn = *(cn_t *) ((char *)rdbuf + aoff +
903 iep->reclen - sizeof(cn_t));
904 rdsize = blsize;
905
906 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
907 ntfs_cntob(cn), rdsize, rdbuf, NULL);
908 if (error)
909 goto fail;
910
911 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
912 rdbuf, rdsize);
913 if (error)
914 goto fail;
915
916 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
917 0x18);
918 } else if (fullscan && lookup_ctx) {
919 cn = lookup_ctx->cn;
920 aoff = lookup_ctx->aoff;
921 rdsize = lookup_ctx->rdsize;
922
923 error = ntfs_readattr(ntmp, ip,
924 (cn == 0) ? NTFS_A_INDXROOT : NTFS_A_INDX,
925 "$I30", ntfs_cntob(cn), rdsize, rdbuf, NULL);
926 if (error)
927 goto fail;
928
929 if (cn != 0) {
930 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
931 rdbuf, rdsize);
932 if (error)
933 goto fail;
934 }
935
936 tctx = lookup_ctx;
937 lookup_ctx = lookup_ctx->prev;
938 free(tctx, M_TEMP);
939 } else {
940 dprintf(("%s: nowhere to dive :-(\n", __func__));
941 error = ENOENT;
942 break;
943 }
944 } while (1);
945
946 /* perform full scan if no entry was found */
947 if (!fullscan && error == ENOENT) {
948 fullscan = 1;
949 cn = 0; /* need zero, used by lookup_ctx */
950
951 ddprintf(("%s: fullscan performed for: %.*s\n", __func__,
952 (int) fnamelen, fname));
953 goto loop;
954 }
955
956 dprintf(("finish\n"));
957
958fail:
959 if (attrname)
960 free(attrname, M_TEMP);
961 if (lookup_ctx) {
962 while(lookup_ctx) {
963 tctx = lookup_ctx;
964 lookup_ctx = lookup_ctx->prev;
965 free(tctx, M_TEMP);
966 }
967 }
968 if (vap)
969 ntfs_ntvattrrele(vap);
970 if (rdbuf)
971 free(rdbuf, M_TEMP);
972 ntfs_ntput(ip);
973 return (error);
974}
975
976/*
977 * Check if name type is permitted to show.
978 */
979int
980ntfs_isnamepermitted(struct ntfsmount *ntmp, struct attr_indexentry *iep)
981{
982 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
983 return 1;
984
985 switch (iep->ie_fnametype) {
986 case 2:
987 ddprintf(("%s: skipped DOS name\n", __func__));
988 return 0;
989 case 0: case 1: case 3:
990 return 1;
991 default:
992 printf("%s: WARNING! Unknown file name type: %d\n", __func__,
993 iep->ie_fnametype);
994 break;
995 }
996 return 0;
997}
998
999/*
1000 * Read ntfs dir like stream of attr_indexentry, not like btree of them.
1001 * This is done by scanning $BITMAP:$I30 for busy clusters and reading them.
1002 * Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in
1003 * fnode, so we can skip toward record number num almost immediately.
1004 * Anyway this is rather slow routine. The problem is that we don't know
1005 * how many records are there in $INDEX_ALLOCATION:$I30 block.
1006 */
1007int
1008ntfs_ntreaddir(struct ntfsmount *ntmp, struct fnode *fp, u_int32_t num,
1009 struct attr_indexentry **riepp)
1010{
1011 struct ntnode *ip = FTONT(fp);
1012 struct ntvattr *vap = NULL; /* IndexRoot attribute */
1013 struct ntvattr *bmvap = NULL; /* BitMap attribute */
1014 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */
1015 void * rdbuf; /* Buffer to read directory's blocks */
1016 u_char *bmp = NULL; /* Bitmap */
1017 u_int32_t blsize; /* Index allocation size (2048) */
1018 u_int32_t rdsize; /* Length of data to read */
1019 u_int32_t attrnum; /* Current attribute type */
1020 u_int32_t cpbl = 1; /* Clusters per directory block */
1021 u_int32_t blnum;
1022 struct attr_indexentry *iep;
1023 int error = ENOENT;
1024 u_int32_t aoff, cnum;
1025
1026 dprintf(("%s: read ino: %llu, num: %d\n", __func__,
1027 (unsigned long long)ip->i_number, num));
1028 error = ntfs_ntget(ip);
1029 if (error)
1030 return (error);
1031
1032 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
1033 if (error) {
1034 error = ENOTDIR;
1035 goto fail;
1036 }
1037
1038 if (fp->f_dirblbuf == NULL) {
1039 fp->f_dirblsz = vap->va_a_iroot->ir_size;
1040 fp->f_dirblbuf = malloc(MAX(vap->va_datalen, fp->f_dirblsz),
1041 M_NTFSDIR, M_WAITOK);
1042 }
1043
1044 blsize = fp->f_dirblsz;
1045 rdbuf = fp->f_dirblbuf;
1046
1047 dprintf(("%s: rdbuf: %p, blsize: %d\n", __func__, rdbuf, blsize));
1048
1049 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
1050 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
1051 0, &bmvap);
1052 if (error) {
1053 error = ENOTDIR;
1054 goto fail;
1055 }
1056 bmp = (u_char *) malloc(bmvap->va_datalen, M_TEMP, M_WAITOK);
1057 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
1058 bmvap->va_datalen, bmp, NULL);
1059 if (error)
1060 goto fail;
1061
1062 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
1063 0, &iavap);
1064 if (error) {
1065 error = ENOTDIR;
1066 goto fail;
1067 }
1068 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
1069 dprintf(("%s: indexalloc: %qu, cpbl: %d\n", __func__,
1070 (long long)iavap->va_datalen, cpbl));
1071 } else {
1072 dprintf(("%s: w/o BitMap and IndexAllocation\n", __func__));
1073 iavap = bmvap = NULL;
1074 bmp = NULL;
1075 }
1076
1077 /* Try use previous values */
1078 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
1079 attrnum = fp->f_lastdattr;
1080 aoff = fp->f_lastdoff;
1081 blnum = fp->f_lastdblnum;
1082 cnum = fp->f_lastdnum;
1083 } else {
1084 attrnum = NTFS_A_INDXROOT;
1085 aoff = sizeof(struct attr_indexroot);
1086 blnum = 0;
1087 cnum = 0;
1088 }
1089
1090 do {
1091 dprintf(("%s: scan: 0x%x, %d, %d, %d, %d\n", __func__,
1092 attrnum, (u_int32_t) blnum, cnum, num, aoff));
1093 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
1094 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
1095 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
1096 if (error)
1097 goto fail;
1098
1099 if (attrnum == NTFS_A_INDX) {
1100 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1101 rdbuf, rdsize);
1102 if (error)
1103 goto fail;
1104 }
1105 if (aoff == 0)
1106 aoff = (attrnum == NTFS_A_INDX) ?
1107 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
1108 sizeof(struct attr_indexroot);
1109
1110 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff);
1111 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
1112 aoff += iep->reclen,
1113 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff))
1114 {
1115 if (!ntfs_isnamepermitted(ntmp, iep))
1116 continue;
1117 if (cnum >= num) {
1118 fp->f_lastdnum = cnum;
1119 fp->f_lastdoff = aoff;
1120 fp->f_lastdblnum = blnum;
1121 fp->f_lastdattr = attrnum;
1122
1123 *riepp = iep;
1124
1125 error = 0;
1126 goto fail;
1127 }
1128 cnum++;
1129 }
1130
1131 if (iavap) {
1132 if (attrnum == NTFS_A_INDXROOT)
1133 blnum = 0;
1134 else
1135 blnum++;
1136
1137 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
1138 if (bmp[blnum >> 3] & (1 << (blnum & 3)))
1139 break;
1140 blnum++;
1141 }
1142
1143 attrnum = NTFS_A_INDX;
1144 aoff = 0;
1145 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
1146 break;
1147 dprintf(("%s: blnum: %d\n", __func__,
1148 (u_int32_t) blnum));
1149 }
1150 } while (iavap);
1151
1152 *riepp = NULL;
1153 fp->f_lastdnum = 0;
1154
1155fail:
1156 if (vap)
1157 ntfs_ntvattrrele(vap);
1158 if (bmvap)
1159 ntfs_ntvattrrele(bmvap);
1160 if (iavap)
1161 ntfs_ntvattrrele(iavap);
1162 if (bmp)
1163 free(bmp, M_TEMP);
1164 ntfs_ntput(ip);
1165 return (error);
1166}
1167
1168/*
1169 * Convert NTFS times that are in 100 ns units and begins from
1170 * 1601 Jan 1 into unix times.
1171 */
1172struct timespec
1173ntfs_nttimetounix(u_int64_t nt)
1174{
1175 struct timespec t;
1176
1177 /* WindowNT times are in 100 ns and from 1601 Jan 1 */
1178 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
1179 t.tv_sec = nt / (1000 * 1000 * 10) -
1180 369LL * 365LL * 24LL * 60LL * 60LL -
1181 89LL * 1LL * 24LL * 60LL * 60LL;
1182 return (t);
1183}
1184
1185/*
1186 * This is one of the write routines.
1187 */
1188int
1189ntfs_writeattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1190 u_int32_t attrnum, char *attrname, off_t roff, size_t rsize, void *rdata,
1191 size_t *initp, struct uio *uio)
1192{
1193 size_t init;
1194 int error = 0;
1195 off_t off = roff, left = rsize, towrite;
1196 void *data = rdata;
1197 struct ntvattr *vap;
1198 *initp = 0;
1199
1200 while (left) {
1201 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1202 ntfs_btocn(off), &vap);
1203 if (error)
1204 return (error);
1205 towrite = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1206 ddprintf(("%s: o: %qd, s: %qd (%qu - %qu)\n", __func__,
1207 (long long) off, (long long) towrite,
1208 (long long) vap->va_vcnstart,
1209 (long long) vap->va_vcnend));
1210 error = ntfs_writentvattr_plain(ntmp, ip, vap,
1211 off - ntfs_cntob(vap->va_vcnstart),
1212 towrite, data, &init, uio);
1213 if (error) {
1214 dprintf(("%s: "
1215 "ntfs_writentvattr_plain failed: o: %qd, s: %qd\n",
1216 __func__, (long long) off, (long long) towrite));
1217 dprintf(("%s: attrib: %qu - %qu\n", __func__,
1218 (long long) vap->va_vcnstart,
1219 (long long) vap->va_vcnend));
1220 ntfs_ntvattrrele(vap);
1221 break;
1222 }
1223 ntfs_ntvattrrele(vap);
1224 left -= towrite;
1225 off += towrite;
1226 data = (char *)data + towrite;
1227 *initp += init;
1228 }
1229
1230 return (error);
1231}
1232
1233/*
1234 * This is one of the write routines.
1235 *
1236 * ntnode should be locked.
1237 */
1238int
1239ntfs_writentvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1240 struct ntvattr *vap, off_t roff, size_t rsize, void *rdata, size_t *initp,
1241 struct uio *uio)
1242{
1243 int error = 0;
1244 off_t off;
1245 int cnt;
1246 cn_t ccn, ccl, cn, left, cl;
1247 void *data = rdata;
1248 daddr_t lbn;
1249 struct buf *bp;
1250 size_t tocopy;
1251
1252 *initp = 0;
1253
1254 if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
1255 dprintf(("%s: CAN'T WRITE RES. ATTRIBUTE\n", __func__));
1256 return ENOTTY;
1257 }
1258
1259 ddprintf(("%s: data in run: %lu chains\n", __func__,
1260 vap->va_vruncnt));
1261
1262 off = roff;
1263 left = rsize;
1264 ccl = 0;
1265 ccn = 0;
1266 cnt = 0;
1267 for (; left && (cnt < vap->va_vruncnt); cnt++) {
1268 ccn = vap->va_vruncn[cnt];
1269 ccl = vap->va_vruncl[cnt];
1270
1271 ddprintf(("%s: left %qu, cn: 0x%qx, cl: %qu, off: %qd\n",
1272 __func__, (long long) left, (long long) ccn,
1273 (long long) ccl, (long long) off));
1274
1275 if (ntfs_cntob(ccl) < off) {
1276 off -= ntfs_cntob(ccl);
1277 cnt++;
1278 continue;
1279 }
1280 if (!ccn && ip->i_number != NTFS_BOOTINO)
1281 continue; /* XXX */
1282
1283 ccl -= ntfs_btocn(off);
1284 cn = ccn + ntfs_btocn(off);
1285 off = ntfs_btocnoff(off);
1286
1287 while (left && ccl) {
1288 /*
1289 * Always read and write single clusters at a time -
1290 * we need to avoid requesting differently-sized
1291 * blocks at the same disk offsets to avoid
1292 * confusing the buffer cache.
1293 */
1294 tocopy = MIN(left, ntfs_cntob(1) - off);
1295 cl = ntfs_btocl(tocopy + off);
1296 KASSERT(cl == 1 && tocopy <= ntfs_cntob(1));
1297 ddprintf(("%s: write: cn: 0x%qx cl: %qu, off: %qd "
1298 "len: %qu, left: %qu\n", __func__,
1299 (long long) cn, (long long) cl,
1300 (long long) off, (long long) tocopy,
1301 (long long) left));
1302 if ((off == 0) && (tocopy == ntfs_cntob(cl))) {
1303 lbn = ntfs_cntobn(cn);
1304 bp = getblk(ntmp->ntm_devvp, lbn,
1305 ntfs_cntob(cl), 0, 0);
1306 clrbuf(bp);
1307 } else {
1308 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
1309 ntfs_cntob(cl), B_MODIFY, &bp);
1310 if (error)
1311 return (error);
1312 }
1313 if (uio)
1314 uiomove((char *)bp->b_data + off, tocopy, uio);
1315 else
1316 memcpy((char *)bp->b_data + off, data, tocopy);
1317 bawrite(bp);
1318 data = (char *)data + tocopy;
1319 *initp += tocopy;
1320 off = 0;
1321 left -= tocopy;
1322 cn += cl;
1323 ccl -= cl;
1324 }
1325 }
1326
1327 if (left) {
1328 printf("%s: POSSIBLE RUN ERROR\n", __func__);
1329 error = EINVAL;
1330 }
1331
1332 return (error);
1333}
1334
1335/*
1336 * This is one of the read routines.
1337 *
1338 * ntnode should be locked.
1339 */
1340int
1341ntfs_readntvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1342 struct ntvattr *vap, off_t roff, size_t rsize, void *rdata, size_t *initp,
1343 struct uio *uio)
1344{
1345 int error = 0;
1346 off_t off;
1347
1348 *initp = 0;
1349 if (vap->va_flag & NTFS_AF_INRUN) {
1350 int cnt;
1351 cn_t ccn, ccl, cn, left, cl;
1352 void *data = rdata;
1353 struct buf *bp;
1354 size_t tocopy;
1355
1356 ddprintf(("%s: data in run: %lu chains\n", __func__,
1357 vap->va_vruncnt));
1358
1359 off = roff;
1360 left = rsize;
1361 ccl = 0;
1362 ccn = 0;
1363 cnt = 0;
1364 while (left && (cnt < vap->va_vruncnt)) {
1365 ccn = vap->va_vruncn[cnt];
1366 ccl = vap->va_vruncl[cnt];
1367
1368 ddprintf(("%s: left %qu, cn: 0x%qx, cl: %qu, "
1369 "off: %qd\n", __func__,
1370 (long long) left, (long long) ccn,
1371 (long long) ccl, (long long) off));
1372
1373 if (ntfs_cntob(ccl) < off) {
1374 off -= ntfs_cntob(ccl);
1375 cnt++;
1376 continue;
1377 }
1378 if (ccn || ip->i_number == NTFS_BOOTINO) {
1379 ccl -= ntfs_btocn(off);
1380 cn = ccn + ntfs_btocn(off);
1381 off = ntfs_btocnoff(off);
1382
1383 while (left && ccl) {
1384 /*
1385 * Always read single clusters at a
1386 * time - we need to avoid reading
1387 * differently-sized blocks at the
1388 * same disk offsets to avoid
1389 * confusing the buffer cache.
1390 */
1391 tocopy = MIN(left,
1392 ntfs_cntob(1) - off);
1393 cl = ntfs_btocl(tocopy + off);
1394 KASSERT(cl == 1 &&
1395 tocopy <= ntfs_cntob(1));
1396
1397 ddprintf(("%s: read: cn: 0x%qx cl: %qu,"
1398 " off: %qd len: %qu, left: %qu\n",
1399 __func__, (long long) cn,
1400 (long long) cl,
1401 (long long) off,
1402 (long long) tocopy,
1403 (long long) left));
1404 error = bread(ntmp->ntm_devvp,
1405 ntfs_cntobn(cn),
1406 ntfs_cntob(cl),
1407 0, &bp);
1408 if (error) {
1409 return (error);
1410 }
1411 if (uio) {
1412 uiomove((char *)bp->b_data + off,
1413 tocopy, uio);
1414 } else {
1415 memcpy(data, (char *)bp->b_data + off,
1416 tocopy);
1417 }
1418 brelse(bp, 0);
1419 data = (char *)data + tocopy;
1420 *initp += tocopy;
1421 off = 0;
1422 left -= tocopy;
1423 cn += cl;
1424 ccl -= cl;
1425 }
1426 } else {
1427 tocopy = MIN(left, ntfs_cntob(ccl) - off);
1428 ddprintf(("%s: hole: ccn: 0x%qx ccl: %qu, "
1429 "off: %qd, len: %qu, left: %qu\n", __func__,
1430 (long long) ccn, (long long) ccl,
1431 (long long) off, (long long) tocopy,
1432 (long long) left));
1433 left -= tocopy;
1434 off = 0;
1435 if (uio) {
1436 char vbuf[] = "";
1437 size_t remains = tocopy;
1438 for (; remains; remains--)
1439 uiomove(vbuf, 1, uio);
1440 } else
1441 memset(data, 0, tocopy);
1442 data = (char *)data + tocopy;
1443 }
1444 cnt++;
1445 }
1446 if (left) {
1447 printf("%s: POSSIBLE RUN ERROR\n", __func__);
1448 error = E2BIG;
1449 }
1450 } else {
1451 ddprintf(("%s: data is in mft record\n", __func__));
1452 if (uio)
1453 uiomove((char *)vap->va_datap + roff, rsize, uio);
1454 else
1455 memcpy(rdata, (char *)vap->va_datap + roff, rsize);
1456 *initp += rsize;
1457 }
1458
1459 return (error);
1460}
1461
1462/*
1463 * This is one of the read routines.
1464 */
1465int
1466ntfs_readattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1467 u_int32_t attrnum, const char *attrname, off_t roff, size_t rsize,
1468 void *rdata, size_t *initp, struct uio *uio)
1469{
1470 size_t init;
1471 int error = 0;
1472 off_t off = roff, left = rsize, toread;
1473 void *data = rdata;
1474 struct ntvattr *vap;
1475 *initp = 0;
1476
1477 while (left) {
1478 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1479 ntfs_btocn(off), &vap);
1480 if (error)
1481 return (error);
1482 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1483 ddprintf(("%s: o: %qd, s: %qd (%qu - %qu)\n", __func__,
1484 (long long) off, (long long) toread,
1485 (long long) vap->va_vcnstart,
1486 (long long) vap->va_vcnend));
1487 error = ntfs_readntvattr_plain(ntmp, ip, vap,
1488 off - ntfs_cntob(vap->va_vcnstart),
1489 toread, data, &init, uio);
1490 if (error) {
1491 printf("%s: ntfs_readntvattr_plain failed: o: %qd, "
1492 "s: %qd\n", __func__,
1493 (long long) off, (long long) toread);
1494 printf("%s: attrib: %qu - %qu\n", __func__,
1495 (long long) vap->va_vcnstart,
1496 (long long) vap->va_vcnend);
1497 ntfs_ntvattrrele(vap);
1498 break;
1499 }
1500 ntfs_ntvattrrele(vap);
1501 left -= toread;
1502 off += toread;
1503 data = (char *)data + toread;
1504 *initp += init;
1505 }
1506
1507 return (error);
1508}
1509
1510/*
1511 * This is one of the read routines.
1512 */
1513int
1514ntfs_readattr(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t attrnum,
1515 const char *attrname, off_t roff, size_t rsize, void *rdata,
1516 struct uio *uio)
1517{
1518 int error = 0;
1519 struct ntvattr *vap;
1520 size_t init;
1521
1522 ddprintf(("%s: reading %llu: 0x%x, from %qd size %qu bytes\n",
1523 __func__, (unsigned long long)ip->i_number, attrnum,
1524 (long long)roff, (long long)rsize));
1525
1526 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
1527 if (error)
1528 return (error);
1529
1530 if ((roff > vap->va_datalen) ||
1531 (roff + rsize > vap->va_datalen)) {
1532 printf("%s: offset too big: %qd (%qd) > %qu\n", __func__,
1533 (long long) roff, (long long) (roff + rsize),
1534 (long long) vap->va_datalen);
1535 ntfs_ntvattrrele(vap);
1536 return (E2BIG);
1537 }
1538 if (vap->va_compression && vap->va_compressalg) {
1539 u_int8_t *cup, *uup;
1540 off_t off, left, tocopy;
1541 void *data;
1542 cn_t cn;
1543
1544 left = rsize;
1545 data = rdata;
1546 ddprintf(("%s: compression: %d\n", __func__,
1547 vap->va_compressalg));
1548
1549 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
1550 M_NTFSDECOMP, M_WAITOK);
1551 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
1552 M_NTFSDECOMP, M_WAITOK);
1553
1554 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
1555 off = roff - ntfs_cntob(cn);
1556
1557 while (left) {
1558 error = ntfs_readattr_plain(ntmp, ip, attrnum,
1559 attrname, ntfs_cntob(cn),
1560 ntfs_cntob(NTFS_COMPUNIT_CL), cup, &init, NULL);
1561 if (error)
1562 break;
1563
1564 tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
1565
1566 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
1567 if (uio)
1568 uiomove(cup + off, tocopy, uio);
1569 else
1570 memcpy(data, cup + off, tocopy);
1571 } else if (init == 0) {
1572 if (uio) {
1573 char vbuf[] = "";
1574 size_t remains = tocopy;
1575 for (; remains; remains--)
1576 uiomove(vbuf, 1, uio);
1577 }
1578 else
1579 memset(data, 0, tocopy);
1580 } else {
1581 error = ntfs_uncompunit(ntmp, uup, cup);
1582 if (error)
1583 break;
1584 if (uio)
1585 uiomove(uup + off, tocopy, uio);
1586 else
1587 memcpy(data, uup + off, tocopy);
1588 }
1589
1590 left -= tocopy;
1591 data = (char *)data + tocopy;
1592 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
1593 cn += NTFS_COMPUNIT_CL;
1594 }
1595
1596 free(uup, M_NTFSDECOMP);
1597 free(cup, M_NTFSDECOMP);
1598 } else
1599 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
1600 roff, rsize, rdata, &init, uio);
1601 ntfs_ntvattrrele(vap);
1602 return (error);
1603}
1604
1605#if UNUSED_CODE
1606int
1607ntfs_parserun(cn_t *cn, cn_t *cl, u_int8_t *run, u_long len, u_long *off)
1608{
1609 u_int8_t sz;
1610 int i;
1611
1612 if (NULL == run) {
1613 printf("%s: run == NULL\n", __func__);
1614 return (EINVAL);
1615 }
1616 sz = run[(*off)++];
1617 if (0 == sz) {
1618 printf("%s: trying to go out of run\n", __func__);
1619 return (E2BIG);
1620 }
1621 *cl = 0;
1622 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1623 printf("%s: bad run: length too big: sz: 0x%02x "
1624 "(%ld < %ld + sz)\n", __func__, sz, len, *off);
1625 return (EINVAL);
1626 }
1627 for (i = 0; i < (sz & 0xF); i++)
1628 *cl += (u_int32_t) run[(*off)++] << (i << 3);
1629
1630 sz >>= 4;
1631 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1632 printf("%s: bad run: length too big: sz: 0x%02x "
1633 "(%ld < %ld + sz)\n", __func__, sz, len, *off);
1634 return (EINVAL);
1635 }
1636 for (i = 0; i < (sz & 0xF); i++)
1637 *cn += (u_int32_t) run[(*off)++] << (i << 3);
1638
1639 return (0);
1640}
1641#endif
1642
1643/*
1644 * Process fixup routine on given buffer.
1645 */
1646int
1647ntfs_procfixups(struct ntfsmount *ntmp, u_int32_t magic, void *xbufv,
1648 size_t len)
1649{
1650 char *xbuf = xbufv;
1651 struct fixuphdr *fhp = (struct fixuphdr *) xbuf;
1652 int i;
1653 u_int16_t fixup;
1654 u_int16_t *fxp, *cfxp;
1655
1656 if (fhp->fh_magic == 0)
1657 return (EINVAL);
1658 if (fhp->fh_magic != magic) {
1659 printf("%s: magic doesn't match: %08x != %08x\n", __func__,
1660 fhp->fh_magic, magic);
1661 return (EINVAL);
1662 }
1663 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
1664 printf("%s: bad fixups number: %d for %ld bytes block\n",
1665 __func__, fhp->fh_fnum, (long)len); /* XXX printf kludge */
1666 return (EINVAL);
1667 }
1668 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
1669 printf("%s: invalid offset: %x", __func__, fhp->fh_foff);
1670 return (EINVAL);
1671 }
1672 fxp = (u_int16_t *) (xbuf + fhp->fh_foff);
1673 cfxp = (u_int16_t *) (xbuf + ntmp->ntm_bps - 2);
1674 fixup = *fxp++;
1675 for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
1676 if (*cfxp != fixup) {
1677 printf("%s: fixup %d doesn't match\n", __func__, i);
1678 return (EINVAL);
1679 }
1680 *cfxp = *fxp;
1681 cfxp = (u_int16_t *)((char *)cfxp + ntmp->ntm_bps);
1682 }
1683 return (0);
1684}
1685
1686#if UNUSED_CODE
1687int
1688ntfs_runtocn(cn_t *cn, struct ntfsmount *ntmp, u_int8_t *run, u_long len,
1689 cn_t vcn)
1690{
1691 cn_t ccn = 0, ccl = 0;
1692 u_long off = 0;
1693 int error = 0;
1694
1695#ifdef NTFS_DEBUG
1696 int i;
1697 printf("%s: run: %p, %ld bytes, vcn:%ld\n", __func__,
1698 run, len, (u_long) vcn);
1699 printf("%s: run: ", __func__);
1700 for (i = 0; i < len; i++)
1701 printf("0x%02x ", run[i]);
1702 printf("\n");
1703#endif
1704
1705 if (NULL == run) {
1706 printf("%s: run == NULL\n", __func__);
1707 return (EINVAL);
1708 }
1709 do {
1710 if (run[off] == 0) {
1711 printf("%s: vcn too big\n", __func__);
1712 return (E2BIG);
1713 }
1714 vcn -= ccl;
1715 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
1716 if (error) {
1717 printf("%s: ntfs_parserun failed\n", __func__);
1718 return (error);
1719 }
1720 } while (ccl <= vcn);
1721 *cn = ccn + vcn;
1722 return (0);
1723}
1724#endif
1725
1726/*
1727 * this initializes toupper table & dependent variables to be ready for
1728 * later work
1729 */
1730void
1731ntfs_toupper_init(void)
1732{
1733 ntfs_toupper_tab = NULL;
1734 mutex_init(&ntfs_toupper_lock, MUTEX_DEFAULT, IPL_NONE);
1735 ntfs_toupper_usecount = 0;
1736}
1737
1738/*
1739 * if the ntfs_toupper_tab[] is filled already, just raise use count;
1740 * otherwise read the data from the filesystem we are currently mounting
1741 */
1742int
1743ntfs_toupper_use(struct mount *mp, struct ntfsmount *ntmp)
1744{
1745 int error = 0;
1746 struct vnode *vp;
1747
1748 /* get exclusive access */
1749 mutex_enter(&ntfs_toupper_lock);
1750
1751 /* only read the translation data from a file if it hasn't been
1752 * read already */
1753 if (ntfs_toupper_tab)
1754 goto out;
1755
1756 /*
1757 * Read in Unicode lowercase -> uppercase translation file.
1758 * XXX for now, just the first 256 entries are used anyway,
1759 * so don't bother reading more
1760 */
1761 ntfs_toupper_tab = malloc(256 * 256 * sizeof(*ntfs_toupper_tab),
1762 M_NTFSRDATA, M_WAITOK);
1763
1764 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp)))
1765 goto out;
1766 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
1767 0, 256 * 256 * sizeof(*ntfs_toupper_tab), (char *)ntfs_toupper_tab,
1768 NULL);
1769 vput(vp);
1770
1771out:
1772 ntfs_toupper_usecount++;
1773 mutex_exit(&ntfs_toupper_lock);
1774 return (error);
1775}
1776
1777/*
1778 * lower the use count and if it reaches zero, free the memory
1779 * tied by toupper table
1780 */
1781void
1782ntfs_toupper_unuse(void)
1783{
1784 /* get exclusive access */
1785 mutex_enter(&ntfs_toupper_lock);
1786
1787 ntfs_toupper_usecount--;
1788 if (ntfs_toupper_usecount == 0) {
1789 free(ntfs_toupper_tab, M_NTFSRDATA);
1790 ntfs_toupper_tab = NULL;
1791 }
1792#ifdef DIAGNOSTIC
1793 else if (ntfs_toupper_usecount < 0) {
1794 panic("ntfs_toupper_unuse(): use count negative: %d",
1795 ntfs_toupper_usecount);
1796 }
1797#endif
1798
1799 /* release the lock */
1800 mutex_exit(&ntfs_toupper_lock);
1801}
1802