1 /* $NetBSD: ntfs_subr.c,v 1.64 2021/05/13 08:57:29 hannken 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 1.64 2021/05/13 08:57:29 hannken 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
58 int ntfs_debug = NTFS_DEBUG;
59 #endif
60
61 MALLOC_JUSTDEFINE(M_NTFSNTVATTR, "NTFS vattr",
62 "NTFS file attribute information");
63 MALLOC_JUSTDEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
64 MALLOC_JUSTDEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
65 MALLOC_JUSTDEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
66
67 /* Local struct used in ntfs_ntlookupfile() */
68 struct 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
75 static int ntfs_ntlookupattr(struct ntfsmount *, const char *, int,
76 int *, char **);
77 static int ntfs_findvattr(struct ntfsmount *, struct ntnode *,
78 struct ntvattr **, struct ntvattr **, u_int32_t, const char *,
79 size_t, cn_t);
80 static int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t,
81 const char *, size_t);
82 static 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 */
87 static 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)])
90 static kmutex_t ntfs_toupper_lock;
91 static 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
98 int
ntfs_ntvattrrele(struct ntvattr * vap)99 ntfs_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 */
110 static int
ntfs_findvattr(struct ntfsmount * ntmp,struct ntnode * ip,struct ntvattr ** lvapp,struct ntvattr ** vapp,u_int32_t type,const char * name,size_t namelen,cn_t vcn)111 ntfs_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 */
156 int
ntfs_ntvattrget(struct ntfsmount * ntmp,struct ntnode * ip,u_int32_t type,const char * name,cn_t vcn,struct ntvattr ** vapp)157 ntfs_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));
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
ntfs_loadntnode(struct ntfsmount * ntmp,struct ntnode * ip)258 ntfs_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 ntmp->ntm_sysvn[NTFS_MFTINO] == NULL) {
272 struct buf *bp;
273 daddr_t bn;
274 off_t boff;
275 size_t resid, l;
276 char *data;
277
278 dprintf(("%s: read system node\n", __func__));
279
280 /*
281 * Make sure we always read full cluster to
282 * prevent buffer cache inconsistency.
283 */
284 boff = ntfs_cntob(ntmp->ntm_mftcn) +
285 ntfs_bntob(ntmp->ntm_bpmftrec) * ip->i_number;
286 bn = ntfs_cntobn(ntfs_btocn(boff));
287 boff = ntfs_btocnoff(boff);
288 resid = ntfs_bntob(ntmp->ntm_bpmftrec);
289 data = (char *)mfrp;
290 while (resid > 0) {
291 l = MIN(resid, ntfs_cntob(1) - boff);
292
293 error = bread(ntmp->ntm_devvp, bn, ntfs_cntob(1),
294 0, &bp);
295 if (error) {
296 printf("%s: BREAD FAILED\n", __func__);
297 goto out;
298 }
299 memcpy(data, (char *)bp->b_data + boff, l);
300 bqrelse(bp);
301
302 bn += ntfs_cntobn(1);
303 boff = 0;
304 data += l;
305 resid -= l;
306 }
307 } else {
308 struct vnode *vp;
309
310 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
311 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
312 ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
313 ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
314 if (error) {
315 printf("%s: ntfs_readattr failed\n", __func__);
316 goto out;
317 }
318 }
319
320 /* Check if magic and fixups are correct */
321 error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (void *)mfrp,
322 ntfs_bntob(ntmp->ntm_bpmftrec));
323 if (error) {
324 printf("%s: BAD MFT RECORD %d\n", __func__,
325 (u_int32_t) ip->i_number);
326 goto out;
327 }
328
329 dprintf(("%s: load attrs for ino: %llu\n", __func__,
330 (unsigned long long)ip->i_number));
331 off = mfrp->fr_attroff;
332 ap = (struct attr *) ((char *)mfrp + off);
333
334 LIST_INIT(&ip->i_valist);
335
336 while (ap->a_hdr.a_type != -1) {
337 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
338 if (error)
339 break;
340 nvap->va_ip = ip;
341
342 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
343
344 off += ap->a_hdr.reclen;
345 ap = (struct attr *) ((char *)mfrp + off);
346 }
347 if (error) {
348 printf("%s: failed to load attr ino: %llu\n", __func__,
349 (unsigned long long)ip->i_number);
350 goto out;
351 }
352
353 ip->i_mainrec = mfrp->fr_mainrec;
354 ip->i_nlink = mfrp->fr_nlink;
355 ip->i_frflag = mfrp->fr_flags;
356
357 ip->i_flag |= IN_LOADED;
358
359 out:
360 free(mfrp, M_TEMP);
361 return (error);
362 }
363
364 /*
365 * Routine locks ntnode and increase usecount, just opposite of
366 * ntfs_ntput().
367 */
368 int
ntfs_ntget(struct ntnode * ip)369 ntfs_ntget(struct ntnode *ip)
370 {
371 dprintf(("%s: get ntnode %llu: %p, usecount: %d\n", __func__,
372 (unsigned long long)ip->i_number, ip, ip->i_usecount));
373
374 mutex_enter(&ip->i_interlock);
375 ip->i_usecount++;
376 while (ip->i_busy != 0) {
377 cv_wait(&ip->i_lock, &ip->i_interlock);
378 }
379 ip->i_busy = 1;
380 mutex_exit(&ip->i_interlock);
381
382 return 0;
383 }
384
385 /*
386 * Routine search ntnode in hash, if found: lock, inc usecount and return.
387 * If not in hash allocate structure for ntnode, prefill it, lock,
388 * inc count and return.
389 *
390 * ntnode returned locked
391 */
392 int
ntfs_ntlookup(struct ntfsmount * ntmp,ino_t ino,struct ntnode ** ipp)393 ntfs_ntlookup(struct ntfsmount *ntmp, ino_t ino, struct ntnode **ipp)
394 {
395 struct ntnode *ip;
396
397 dprintf(("%s: looking for ntnode %llu\n", __func__,
398 (unsigned long long)ino));
399
400 if ((*ipp = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
401 ntfs_ntget(*ipp);
402 dprintf(("%s: ntnode %llu: %p, usecount: %d\n", __func__,
403 (unsigned long long)ino, *ipp, (*ipp)->i_usecount));
404 return (0);
405 }
406
407 ip = malloc(sizeof(*ip), M_NTFSNTNODE, M_WAITOK|M_ZERO);
408 ddprintf(("%s: allocating ntnode: %llu: %p\n", __func__,
409 (unsigned long long)ino, ip));
410
411 mutex_enter(&ntfs_hashlock);
412 if ((*ipp = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
413 mutex_exit(&ntfs_hashlock);
414 ntfs_ntget(*ipp);
415 free(ip, M_NTFSNTNODE);
416 dprintf(("%s: ntnode %llu: %p, usecount: %d\n", __func__,
417 (unsigned long long)ino, *ipp, (*ipp)->i_usecount));
418 return (0);
419 }
420
421 /* Generic initialization */
422 ip->i_devvp = ntmp->ntm_devvp;
423 ip->i_dev = ntmp->ntm_dev;
424 ip->i_number = ino;
425 ip->i_mp = ntmp;
426
427 /* init lock and lock the newborn ntnode */
428 cv_init(&ip->i_lock, "ntfslk");
429 mutex_init(&ip->i_interlock, MUTEX_DEFAULT, IPL_NONE);
430 ntfs_ntget(ip);
431
432 ntfs_nthashins(ip);
433
434 mutex_exit(&ntfs_hashlock);
435
436 *ipp = ip;
437
438 dprintf(("%s: ntnode %llu: %p, usecount: %d\n", __func__,
439 (unsigned long long)ino, ip, ip->i_usecount));
440
441 return (0);
442 }
443
444 /*
445 * Decrement usecount of ntnode and unlock it, if usecount reaches zero,
446 * deallocate ntnode.
447 *
448 * ntnode should be locked on entry, and unlocked on return.
449 */
450 void
ntfs_ntput(struct ntnode * ip)451 ntfs_ntput(struct ntnode *ip)
452 {
453 struct ntvattr *vap;
454
455 dprintf(("%s: rele ntnode %llu: %p, usecount: %d\n", __func__,
456 (unsigned long long)ip->i_number, ip, ip->i_usecount));
457
458 mutex_enter(&ip->i_interlock);
459 ip->i_usecount--;
460
461 #ifdef DIAGNOSTIC
462 if (ip->i_usecount < 0) {
463 panic("ntfs_ntput: ino: %llu usecount: %d ",
464 (unsigned long long)ip->i_number, ip->i_usecount);
465 }
466 #endif
467
468 ip->i_busy = 0;
469 cv_signal(&ip->i_lock);
470 mutex_exit(&ip->i_interlock);
471
472 if (ip->i_usecount == 0) {
473 dprintf(("%s: deallocating ntnode: %llu\n", __func__,
474 (unsigned long long)ip->i_number));
475
476 ntfs_nthashrem(ip);
477
478 while (ip->i_valist.lh_first != NULL) {
479 vap = ip->i_valist.lh_first;
480 LIST_REMOVE(vap,va_list);
481 ntfs_freentvattr(vap);
482 }
483 mutex_destroy(&ip->i_interlock);
484 cv_destroy(&ip->i_lock);
485 free(ip, M_NTFSNTNODE);
486 }
487 }
488
489 /*
490 * increment usecount of ntnode
491 */
492 void
ntfs_ntref(struct ntnode * ip)493 ntfs_ntref(struct ntnode *ip)
494 {
495 mutex_enter(&ip->i_interlock);
496 ip->i_usecount++;
497 mutex_exit(&ip->i_interlock);
498
499 dprintf(("%s: ino %llu, usecount: %d\n", __func__,
500 (unsigned long long)ip->i_number, ip->i_usecount));
501 }
502
503 /*
504 * Decrement usecount of ntnode.
505 */
506 void
ntfs_ntrele(struct ntnode * ip)507 ntfs_ntrele(struct ntnode *ip)
508 {
509 dprintf(("%s: rele ntnode %llu: %p, usecount: %d\n", __func__,
510 (unsigned long long)ip->i_number, ip, ip->i_usecount));
511
512 mutex_enter(&ip->i_interlock);
513 ip->i_usecount--;
514
515 if (ip->i_usecount < 0)
516 panic("%s: ino: %llu usecount: %d ", __func__,
517 (unsigned long long)ip->i_number, ip->i_usecount);
518 mutex_exit(&ip->i_interlock);
519 }
520
521 /*
522 * Deallocate all memory allocated for ntvattr
523 */
524 void
ntfs_freentvattr(struct ntvattr * vap)525 ntfs_freentvattr(struct ntvattr *vap)
526 {
527 if (vap->va_flag & NTFS_AF_INRUN) {
528 if (vap->va_vruncn)
529 free(vap->va_vruncn, M_NTFSRUN);
530 if (vap->va_vruncl)
531 free(vap->va_vruncl, M_NTFSRUN);
532 } else {
533 if (vap->va_datap)
534 free(vap->va_datap, M_NTFSRDATA);
535 }
536 free(vap, M_NTFSNTVATTR);
537 }
538
539 /*
540 * Convert disk image of attribute into ntvattr structure,
541 * runs are expanded also.
542 */
543 int
ntfs_attrtontvattr(struct ntfsmount * ntmp,struct ntvattr ** rvapp,struct attr * rap)544 ntfs_attrtontvattr(struct ntfsmount *ntmp, struct ntvattr **rvapp,
545 struct attr *rap)
546 {
547 int error, i;
548 struct ntvattr *vap;
549
550 error = 0;
551 *rvapp = NULL;
552
553 vap = malloc(sizeof(*vap), M_NTFSNTVATTR, M_WAITOK|M_ZERO);
554 vap->va_ip = NULL;
555 vap->va_flag = rap->a_hdr.a_flag;
556 vap->va_type = rap->a_hdr.a_type;
557 vap->va_compression = rap->a_hdr.a_compression;
558 vap->va_index = rap->a_hdr.a_index;
559
560 ddprintf(("%s: type: 0x%x, index: %d", __func__,
561 vap->va_type, vap->va_index));
562
563 vap->va_namelen = rap->a_hdr.a_namelen;
564 if (rap->a_hdr.a_namelen) {
565 wchar *unp = (wchar *)((char *)rap + rap->a_hdr.a_nameoff);
566 ddprintf((", name:["));
567 for (i = 0; i < vap->va_namelen; i++) {
568 vap->va_name[i] = unp[i];
569 ddprintf(("%c", vap->va_name[i]));
570 }
571 ddprintf(("]"));
572 }
573 if (vap->va_flag & NTFS_AF_INRUN) {
574 ddprintf((", nonres."));
575 vap->va_datalen = rap->a_nr.a_datalen;
576 vap->va_allocated = rap->a_nr.a_allocated;
577 vap->va_vcnstart = rap->a_nr.a_vcnstart;
578 vap->va_vcnend = rap->a_nr.a_vcnend;
579 vap->va_compressalg = rap->a_nr.a_compressalg;
580 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
581 &(vap->va_vruncnt),
582 (u_int8_t *) rap + rap->a_nr.a_dataoff);
583 } else {
584 vap->va_compressalg = 0;
585 ddprintf((", res."));
586 vap->va_datalen = rap->a_r.a_datalen;
587 vap->va_allocated = rap->a_r.a_datalen;
588 vap->va_vcnstart = 0;
589 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
590 vap->va_datap = malloc(vap->va_datalen, M_NTFSRDATA, M_WAITOK);
591 memcpy(vap->va_datap, (char *)rap + rap->a_r.a_dataoff,
592 rap->a_r.a_datalen);
593 }
594 ddprintf((", len: %qu", (long long)vap->va_datalen));
595
596 if (error)
597 free(vap, M_NTFSNTVATTR);
598 else
599 *rvapp = vap;
600
601 ddprintf(("\n"));
602
603 return (error);
604 }
605
606 /*
607 * Expand run into more utilizable and more memory eating format.
608 */
609 int
ntfs_runtovrun(cn_t ** rcnp,cn_t ** rclp,u_long * rcntp,u_int8_t * run)610 ntfs_runtovrun(cn_t **rcnp, cn_t **rclp, u_long *rcntp, u_int8_t *run)
611 {
612 u_int32_t off, sz, i;
613 cn_t *cn, *cl;
614 u_long cnt;
615 cn_t prev, tmp;
616
617 off = 0;
618 cnt = 0;
619 i = 0;
620 while (run[off]) {
621 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
622 cnt++;
623 }
624 cn = malloc(cnt * sizeof(*cn), M_NTFSRUN, M_WAITOK);
625 cl = malloc(cnt * sizeof(*cl), M_NTFSRUN, M_WAITOK);
626
627 off = 0;
628 cnt = 0;
629 prev = 0;
630 while (run[off]) {
631 sz = run[off++];
632 cl[cnt] = 0;
633
634 for (i = 0; i < (sz & 0xF); i++)
635 cl[cnt] += (u_int32_t) run[off++] << (i << 3);
636
637 sz >>= 4;
638 if (run[off + sz - 1] & 0x80) {
639 tmp = ((u_int64_t) - 1) << (sz << 3);
640 for (i = 0; i < sz; i++)
641 tmp |= (u_int64_t) run[off++] << (i << 3);
642 } else {
643 tmp = 0;
644 for (i = 0; i < sz; i++)
645 tmp |= (u_int64_t) run[off++] << (i << 3);
646 }
647 if (tmp)
648 prev = cn[cnt] = prev + tmp;
649 else
650 cn[cnt] = tmp;
651
652 cnt++;
653 }
654 *rcnp = cn;
655 *rclp = cl;
656 *rcntp = cnt;
657 return (0);
658 }
659
660 /*
661 * Compare unicode and ascii string case insens.
662 */
663 static int
ntfs_uastricmp(struct ntfsmount * ntmp,const wchar * ustr,size_t ustrlen,const char * astr,size_t astrlen)664 ntfs_uastricmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
665 const char *astr, size_t astrlen)
666 {
667 size_t i;
668 int res;
669
670 for (i = 0; i < ustrlen && astrlen > 0; i++) {
671 res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i]),
672 NTFS_TOUPPER((*ntmp->ntm_wget)(&astr, &astrlen)) );
673 if (res)
674 return res;
675 }
676
677 if (i == ustrlen && astrlen == 0)
678 return 0;
679 else if (i == ustrlen)
680 return -1;
681 else
682 return 1;
683 }
684
685 /*
686 * Compare unicode and ascii string case sens.
687 */
688 static int
ntfs_uastrcmp(struct ntfsmount * ntmp,const wchar * ustr,size_t ustrlen,const char * astr,size_t astrlen)689 ntfs_uastrcmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
690 const char *astr, size_t astrlen)
691 {
692 size_t i;
693 int res;
694
695 for (i = 0; (i < ustrlen) && astrlen > 0; i++) {
696 res = (*ntmp->ntm_wcmp)(ustr[i],
697 (*ntmp->ntm_wget)(&astr, &astrlen));
698 if (res)
699 return res;
700 }
701
702 if (i == ustrlen && astrlen == 0)
703 return 0;
704 else if (i == ustrlen)
705 return -1;
706 else
707 return 1;
708 }
709
710 /*
711 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME],
712 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
713 * If $ATTR_TYPE not specified, ATTR_A_DATA assumed.
714 */
715 static int
ntfs_ntlookupattr(struct ntfsmount * ntmp,const char * name,int namelen,int * attrtype,char ** attrname)716 ntfs_ntlookupattr(struct ntfsmount *ntmp, const char *name, int namelen,
717 int *attrtype, char **attrname)
718 {
719 const char *sys;
720 size_t syslen, i;
721 struct ntvattrdef *adp;
722
723 if (namelen == 0)
724 return (0);
725
726 if (name[0] == '$') {
727 sys = name;
728 for (syslen = 0; syslen < namelen; syslen++) {
729 if (sys[syslen] == ':') {
730 name++;
731 namelen--;
732 break;
733 }
734 }
735 name += syslen;
736 namelen -= syslen;
737
738 adp = ntmp->ntm_ad;
739 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
740 if (syslen != adp->ad_namelen ||
741 strncmp(sys, adp->ad_name, syslen) != 0)
742 continue;
743
744 *attrtype = adp->ad_type;
745 goto out;
746 }
747 return (ENOENT);
748 } else
749 *attrtype = NTFS_A_DATA;
750
751 out:
752 if (namelen) {
753 *attrname = malloc(namelen+1, M_TEMP, M_WAITOK);
754 memcpy((*attrname), name, namelen);
755 (*attrname)[namelen] = '\0';
756 }
757
758 return (0);
759 }
760
761 /*
762 * Lookup specified node for filename, matching cnp,
763 * return referenced vnode with fnode filled.
764 */
765 int
ntfs_ntlookupfile(struct ntfsmount * ntmp,struct vnode * vp,struct componentname * cnp,struct vnode ** vpp)766 ntfs_ntlookupfile(struct ntfsmount *ntmp, struct vnode *vp,
767 struct componentname *cnp, struct vnode **vpp)
768 {
769 struct fnode *fp = VTOF(vp);
770 struct ntnode *ip = FTONT(fp);
771 struct ntvattr *vap = NULL; /* Root attribute */
772 cn_t cn = 0; /* VCN in current attribute */
773 void * rdbuf = NULL; /* Buffer to read directory's blocks */
774 u_int32_t blsize;
775 u_int32_t rdsize; /* Length of data to read from current block */
776 struct attr_indexentry *iep;
777 int error, res, anamelen, fnamelen;
778 const char *fname,*aname;
779 u_int32_t aoff;
780 int attrtype = NTFS_A_DATA;
781 char *attrname = NULL;
782 struct vnode *nvp;
783 int fullscan = 0;
784 struct ntfs_lookup_ctx *lookup_ctx = NULL, *tctx;
785
786 error = ntfs_ntget(ip);
787 if (error)
788 return (error);
789
790 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
791 if (error || (vap->va_flag & NTFS_AF_INRUN)) {
792 error = ENOTDIR;
793 goto fail;
794 }
795
796 /*
797 * Divide file name into: foofilefoofilefoofile[:attrspec]
798 * Store like this: fname:fnamelen [aname:anamelen]
799 */
800 fname = cnp->cn_nameptr;
801 aname = NULL;
802 anamelen = 0;
803 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
804 if (fname[fnamelen] == ':') {
805 aname = fname + fnamelen + 1;
806 anamelen = cnp->cn_namelen - fnamelen - 1;
807 dprintf(("%s: %s (%d), attr: %s (%d)\n", __func__,
808 fname, fnamelen, aname, anamelen));
809 break;
810 }
811
812 blsize = vap->va_a_iroot->ir_size;
813 dprintf(("%s: blksz: %d\n", __func__, blsize));
814 rdbuf = malloc(blsize, M_TEMP, M_WAITOK);
815
816 loop:
817 rdsize = vap->va_datalen;
818 dprintf(("%s: rdsz: %d\n", __func__, rdsize));
819
820 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
821 0, rdsize, rdbuf, NULL);
822 if (error)
823 goto fail;
824
825 aoff = sizeof(struct attr_indexroot);
826
827 do {
828 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff);
829
830 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
831 aoff += iep->reclen,
832 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff))
833 {
834 ddprintf(("%s: fscan: %d, %d\n", __func__,
835 (u_int32_t) iep->ie_number,
836 (u_int32_t) iep->ie_fnametype));
837
838 /* check the name - the case-insensitive check
839 * has to come first, to break from this for loop
840 * if needed, so we can dive correctly */
841 res = ntfs_uastricmp(ntmp, iep->ie_fname,
842 iep->ie_fnamelen, fname, fnamelen);
843 if (!fullscan) {
844 if (res > 0)
845 break;
846 if (res < 0)
847 continue;
848 }
849
850 if (iep->ie_fnametype == 0 ||
851 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
852 {
853 res = ntfs_uastrcmp(ntmp, iep->ie_fname,
854 iep->ie_fnamelen, fname, fnamelen);
855 if (res != 0 && !fullscan)
856 continue;
857 }
858
859 /* if we perform full scan, the file does not match
860 * and this is subnode, dive */
861 if (fullscan && res != 0) {
862 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
863 tctx = malloc(sizeof(*tctx), M_TEMP,
864 M_WAITOK);
865 tctx->aoff = aoff + iep->reclen;
866 tctx->rdsize = rdsize;
867 tctx->cn = cn;
868 tctx->prev = lookup_ctx;
869 lookup_ctx = tctx;
870 break;
871 } else
872 continue;
873 }
874
875 if (aname) {
876 error = ntfs_ntlookupattr(ntmp, aname, anamelen,
877 &attrtype, &attrname);
878 if (error)
879 goto fail;
880 }
881
882 /* Check if we've found ourselves */
883 if ((iep->ie_number == ip->i_number) &&
884 (attrtype == fp->f_attrtype) &&
885 !strcmp(attrname ? attrname : "", fp->f_attrname))
886 {
887 vref(vp);
888 *vpp = vp;
889 error = 0;
890 goto fail;
891 }
892
893 /* vget node */
894 error = ntfs_vgetex(ntmp->ntm_mountp, iep->ie_number,
895 attrtype, attrname ? attrname : "", 0, &nvp);
896
897 /* free the buffer returned by ntfs_ntlookupattr() */
898 if (attrname) {
899 free(attrname, M_TEMP);
900 attrname = NULL;
901 }
902
903 if (error)
904 goto fail;
905
906 *vpp = nvp;
907 goto fail;
908 }
909
910 /* Dive if possible */
911 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
912 dprintf(("%s: diving\n", __func__));
913
914 cn = *(cn_t *) ((char *)rdbuf + aoff +
915 iep->reclen - sizeof(cn_t));
916 rdsize = blsize;
917
918 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
919 ntfs_cntob(cn), rdsize, rdbuf, NULL);
920 if (error)
921 goto fail;
922
923 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
924 rdbuf, rdsize);
925 if (error)
926 goto fail;
927
928 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
929 0x18);
930 } else if (fullscan && lookup_ctx) {
931 cn = lookup_ctx->cn;
932 aoff = lookup_ctx->aoff;
933 rdsize = lookup_ctx->rdsize;
934
935 error = ntfs_readattr(ntmp, ip,
936 (cn == 0) ? NTFS_A_INDXROOT : NTFS_A_INDX,
937 "$I30", ntfs_cntob(cn), rdsize, rdbuf, NULL);
938 if (error)
939 goto fail;
940
941 if (cn != 0) {
942 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
943 rdbuf, rdsize);
944 if (error)
945 goto fail;
946 }
947
948 tctx = lookup_ctx;
949 lookup_ctx = lookup_ctx->prev;
950 free(tctx, M_TEMP);
951 } else {
952 dprintf(("%s: nowhere to dive :-(\n", __func__));
953 error = ENOENT;
954 break;
955 }
956 } while (1);
957
958 /* perform full scan if no entry was found */
959 if (!fullscan && error == ENOENT) {
960 fullscan = 1;
961 cn = 0; /* need zero, used by lookup_ctx */
962
963 ddprintf(("%s: fullscan performed for: %.*s\n", __func__,
964 (int) fnamelen, fname));
965 goto loop;
966 }
967
968 dprintf(("finish\n"));
969
970 fail:
971 if (attrname)
972 free(attrname, M_TEMP);
973 if (lookup_ctx) {
974 while(lookup_ctx) {
975 tctx = lookup_ctx;
976 lookup_ctx = lookup_ctx->prev;
977 free(tctx, M_TEMP);
978 }
979 }
980 if (vap)
981 ntfs_ntvattrrele(vap);
982 if (rdbuf)
983 free(rdbuf, M_TEMP);
984 ntfs_ntput(ip);
985 return (error);
986 }
987
988 /*
989 * Check if name type is permitted to show.
990 */
991 int
ntfs_isnamepermitted(struct ntfsmount * ntmp,struct attr_indexentry * iep)992 ntfs_isnamepermitted(struct ntfsmount *ntmp, struct attr_indexentry *iep)
993 {
994 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
995 return 1;
996
997 switch (iep->ie_fnametype) {
998 case 2:
999 ddprintf(("%s: skipped DOS name\n", __func__));
1000 return 0;
1001 case 0: case 1: case 3:
1002 return 1;
1003 default:
1004 printf("%s: WARNING! Unknown file name type: %d\n", __func__,
1005 iep->ie_fnametype);
1006 break;
1007 }
1008 return 0;
1009 }
1010
1011 /*
1012 * Read ntfs dir like stream of attr_indexentry, not like btree of them.
1013 * This is done by scanning $BITMAP:$I30 for busy clusters and reading them.
1014 * Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in
1015 * fnode, so we can skip toward record number num almost immediately.
1016 * Anyway this is rather slow routine. The problem is that we don't know
1017 * how many records are there in $INDEX_ALLOCATION:$I30 block.
1018 */
1019 int
ntfs_ntreaddir(struct ntfsmount * ntmp,struct fnode * fp,u_int32_t num,struct attr_indexentry ** riepp)1020 ntfs_ntreaddir(struct ntfsmount *ntmp, struct fnode *fp, u_int32_t num,
1021 struct attr_indexentry **riepp)
1022 {
1023 struct ntnode *ip = FTONT(fp);
1024 struct ntvattr *vap = NULL; /* IndexRoot attribute */
1025 struct ntvattr *bmvap = NULL; /* BitMap attribute */
1026 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */
1027 void * rdbuf; /* Buffer to read directory's blocks */
1028 u_char *bmp = NULL; /* Bitmap */
1029 u_int32_t blsize; /* Index allocation size (2048) */
1030 u_int32_t rdsize; /* Length of data to read */
1031 u_int32_t attrnum; /* Current attribute type */
1032 u_int32_t cpbl = 1; /* Clusters per directory block */
1033 u_int32_t blnum;
1034 struct attr_indexentry *iep;
1035 int error = ENOENT;
1036 u_int32_t aoff, cnum;
1037
1038 dprintf(("%s: read ino: %llu, num: %d\n", __func__,
1039 (unsigned long long)ip->i_number, num));
1040 error = ntfs_ntget(ip);
1041 if (error)
1042 return (error);
1043
1044 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
1045 if (error) {
1046 error = ENOTDIR;
1047 goto fail;
1048 }
1049
1050 if (fp->f_dirblbuf == NULL) {
1051 fp->f_dirblsz = vap->va_a_iroot->ir_size;
1052 fp->f_dirblbuf = malloc(MAX(vap->va_datalen, fp->f_dirblsz),
1053 M_NTFSDIR, M_WAITOK);
1054 }
1055
1056 blsize = fp->f_dirblsz;
1057 rdbuf = fp->f_dirblbuf;
1058
1059 dprintf(("%s: rdbuf: %p, blsize: %d\n", __func__, rdbuf, blsize));
1060
1061 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
1062 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
1063 0, &bmvap);
1064 if (error) {
1065 error = ENOTDIR;
1066 goto fail;
1067 }
1068 bmp = (u_char *) malloc(bmvap->va_datalen, M_TEMP, M_WAITOK);
1069 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
1070 bmvap->va_datalen, bmp, NULL);
1071 if (error)
1072 goto fail;
1073
1074 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
1075 0, &iavap);
1076 if (error) {
1077 error = ENOTDIR;
1078 goto fail;
1079 }
1080 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
1081 dprintf(("%s: indexalloc: %qu, cpbl: %d\n", __func__,
1082 (long long)iavap->va_datalen, cpbl));
1083 } else {
1084 dprintf(("%s: w/o BitMap and IndexAllocation\n", __func__));
1085 iavap = bmvap = NULL;
1086 bmp = NULL;
1087 }
1088
1089 /* Try use previous values */
1090 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
1091 attrnum = fp->f_lastdattr;
1092 aoff = fp->f_lastdoff;
1093 blnum = fp->f_lastdblnum;
1094 cnum = fp->f_lastdnum;
1095 } else {
1096 attrnum = NTFS_A_INDXROOT;
1097 aoff = sizeof(struct attr_indexroot);
1098 blnum = 0;
1099 cnum = 0;
1100 }
1101
1102 do {
1103 dprintf(("%s: scan: 0x%x, %d, %d, %d, %d\n", __func__,
1104 attrnum, (u_int32_t) blnum, cnum, num, aoff));
1105 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
1106 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
1107 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
1108 if (error)
1109 goto fail;
1110
1111 if (attrnum == NTFS_A_INDX) {
1112 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1113 rdbuf, rdsize);
1114 if (error)
1115 goto fail;
1116 }
1117 if (aoff == 0)
1118 aoff = (attrnum == NTFS_A_INDX) ?
1119 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
1120 sizeof(struct attr_indexroot);
1121
1122 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff);
1123 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
1124 aoff += iep->reclen,
1125 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff))
1126 {
1127 if (!ntfs_isnamepermitted(ntmp, iep))
1128 continue;
1129 if (cnum >= num) {
1130 fp->f_lastdnum = cnum;
1131 fp->f_lastdoff = aoff;
1132 fp->f_lastdblnum = blnum;
1133 fp->f_lastdattr = attrnum;
1134
1135 *riepp = iep;
1136
1137 error = 0;
1138 goto fail;
1139 }
1140 cnum++;
1141 }
1142
1143 if (iavap) {
1144 if (attrnum == NTFS_A_INDXROOT)
1145 blnum = 0;
1146 else
1147 blnum++;
1148
1149 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
1150 if (bmp[blnum >> 3] & (1 << (blnum & 3)))
1151 break;
1152 blnum++;
1153 }
1154
1155 attrnum = NTFS_A_INDX;
1156 aoff = 0;
1157 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
1158 break;
1159 dprintf(("%s: blnum: %d\n", __func__,
1160 (u_int32_t) blnum));
1161 }
1162 } while (iavap);
1163
1164 *riepp = NULL;
1165 fp->f_lastdnum = 0;
1166
1167 fail:
1168 if (vap)
1169 ntfs_ntvattrrele(vap);
1170 if (bmvap)
1171 ntfs_ntvattrrele(bmvap);
1172 if (iavap)
1173 ntfs_ntvattrrele(iavap);
1174 if (bmp)
1175 free(bmp, M_TEMP);
1176 ntfs_ntput(ip);
1177 return (error);
1178 }
1179
1180 /*
1181 * Convert NTFS times that are in 100 ns units and begins from
1182 * 1601 Jan 1 into unix times.
1183 */
1184 struct timespec
ntfs_nttimetounix(u_int64_t nt)1185 ntfs_nttimetounix(u_int64_t nt)
1186 {
1187 struct timespec t;
1188
1189 /* WindowNT times are in 100 ns and from 1601 Jan 1 */
1190 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
1191 t.tv_sec = nt / (1000 * 1000 * 10) -
1192 369LL * 365LL * 24LL * 60LL * 60LL -
1193 89LL * 1LL * 24LL * 60LL * 60LL;
1194 return (t);
1195 }
1196
1197 /*
1198 * This is one of the write routines.
1199 */
1200 int
ntfs_writeattr_plain(struct ntfsmount * ntmp,struct ntnode * ip,u_int32_t attrnum,char * attrname,off_t roff,size_t rsize,void * rdata,size_t * initp,struct uio * uio)1201 ntfs_writeattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1202 u_int32_t attrnum, char *attrname, off_t roff, size_t rsize, void *rdata,
1203 size_t *initp, struct uio *uio)
1204 {
1205 size_t init;
1206 int error = 0;
1207 off_t off = roff, left = rsize, towrite;
1208 void *data = rdata;
1209 struct ntvattr *vap;
1210 *initp = 0;
1211
1212 while (left) {
1213 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1214 ntfs_btocn(off), &vap);
1215 if (error)
1216 return (error);
1217 towrite = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1218 ddprintf(("%s: o: %qd, s: %qd (%qu - %qu)\n", __func__,
1219 (long long) off, (long long) towrite,
1220 (long long) vap->va_vcnstart,
1221 (long long) vap->va_vcnend));
1222 error = ntfs_writentvattr_plain(ntmp, ip, vap,
1223 off - ntfs_cntob(vap->va_vcnstart),
1224 towrite, data, &init, uio);
1225 if (error) {
1226 dprintf(("%s: "
1227 "ntfs_writentvattr_plain failed: o: %qd, s: %qd\n",
1228 __func__, (long long) off, (long long) towrite));
1229 dprintf(("%s: attrib: %qu - %qu\n", __func__,
1230 (long long) vap->va_vcnstart,
1231 (long long) vap->va_vcnend));
1232 ntfs_ntvattrrele(vap);
1233 break;
1234 }
1235 ntfs_ntvattrrele(vap);
1236 left -= towrite;
1237 off += towrite;
1238 data = (char *)data + towrite;
1239 *initp += init;
1240 }
1241
1242 return (error);
1243 }
1244
1245 /*
1246 * This is one of the write routines.
1247 *
1248 * ntnode should be locked.
1249 */
1250 int
ntfs_writentvattr_plain(struct ntfsmount * ntmp,struct ntnode * ip,struct ntvattr * vap,off_t roff,size_t rsize,void * rdata,size_t * initp,struct uio * uio)1251 ntfs_writentvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1252 struct ntvattr *vap, off_t roff, size_t rsize, void *rdata, size_t *initp,
1253 struct uio *uio)
1254 {
1255 int error = 0;
1256 off_t off;
1257 int cnt;
1258 cn_t ccn, ccl, cn, left, cl;
1259 void *data = rdata;
1260 daddr_t lbn;
1261 struct buf *bp;
1262 size_t tocopy;
1263
1264 *initp = 0;
1265
1266 if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
1267 dprintf(("%s: CAN'T WRITE RES. ATTRIBUTE\n", __func__));
1268 return ENOTTY;
1269 }
1270
1271 ddprintf(("%s: data in run: %lu chains\n", __func__,
1272 vap->va_vruncnt));
1273
1274 off = roff;
1275 left = rsize;
1276 ccl = 0;
1277 ccn = 0;
1278 cnt = 0;
1279 for (; left && (cnt < vap->va_vruncnt); cnt++) {
1280 ccn = vap->va_vruncn[cnt];
1281 ccl = vap->va_vruncl[cnt];
1282
1283 ddprintf(("%s: left %qu, cn: 0x%qx, cl: %qu, off: %qd\n",
1284 __func__, (long long) left, (long long) ccn,
1285 (long long) ccl, (long long) off));
1286
1287 if (ntfs_cntob(ccl) < off) {
1288 off -= ntfs_cntob(ccl);
1289 cnt++;
1290 continue;
1291 }
1292 if (!ccn && ip->i_number != NTFS_BOOTINO)
1293 continue; /* XXX */
1294
1295 ccl -= ntfs_btocn(off);
1296 cn = ccn + ntfs_btocn(off);
1297 off = ntfs_btocnoff(off);
1298
1299 while (left && ccl) {
1300 /*
1301 * Always read and write single clusters at a time -
1302 * we need to avoid requesting differently-sized
1303 * blocks at the same disk offsets to avoid
1304 * confusing the buffer cache.
1305 */
1306 tocopy = MIN(left, ntfs_cntob(1) - off);
1307 cl = ntfs_btocl(tocopy + off);
1308 KASSERT(cl == 1 && tocopy <= ntfs_cntob(1));
1309 ddprintf(("%s: write: cn: 0x%qx cl: %qu, off: %qd "
1310 "len: %qu, left: %qu\n", __func__,
1311 (long long) cn, (long long) cl,
1312 (long long) off, (long long) tocopy,
1313 (long long) left));
1314 if ((off == 0) && (tocopy == ntfs_cntob(cl))) {
1315 lbn = ntfs_cntobn(cn);
1316 bp = getblk(ntmp->ntm_devvp, lbn,
1317 ntfs_cntob(cl), 0, 0);
1318 clrbuf(bp);
1319 } else {
1320 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
1321 ntfs_cntob(cl), B_MODIFY, &bp);
1322 if (error)
1323 return (error);
1324 }
1325 if (uio)
1326 uiomove((char *)bp->b_data + off, tocopy, uio);
1327 else
1328 memcpy((char *)bp->b_data + off, data, tocopy);
1329 bawrite(bp);
1330 data = (char *)data + tocopy;
1331 *initp += tocopy;
1332 off = 0;
1333 left -= tocopy;
1334 cn += cl;
1335 ccl -= cl;
1336 }
1337 }
1338
1339 if (left) {
1340 printf("%s: POSSIBLE RUN ERROR\n", __func__);
1341 error = EINVAL;
1342 }
1343
1344 return (error);
1345 }
1346
1347 /*
1348 * This is one of the read routines.
1349 *
1350 * ntnode should be locked.
1351 */
1352 int
ntfs_readntvattr_plain(struct ntfsmount * ntmp,struct ntnode * ip,struct ntvattr * vap,off_t roff,size_t rsize,void * rdata,size_t * initp,struct uio * uio)1353 ntfs_readntvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1354 struct ntvattr *vap, off_t roff, size_t rsize, void *rdata, size_t *initp,
1355 struct uio *uio)
1356 {
1357 int error = 0;
1358 off_t off;
1359
1360 *initp = 0;
1361 if (vap->va_flag & NTFS_AF_INRUN) {
1362 int cnt;
1363 cn_t ccn, ccl, cn, left, cl;
1364 void *data = rdata;
1365 struct buf *bp;
1366 size_t tocopy;
1367
1368 ddprintf(("%s: data in run: %lu chains\n", __func__,
1369 vap->va_vruncnt));
1370
1371 off = roff;
1372 left = rsize;
1373 ccl = 0;
1374 ccn = 0;
1375 cnt = 0;
1376 while (left && (cnt < vap->va_vruncnt)) {
1377 ccn = vap->va_vruncn[cnt];
1378 ccl = vap->va_vruncl[cnt];
1379
1380 ddprintf(("%s: left %qu, cn: 0x%qx, cl: %qu, "
1381 "off: %qd\n", __func__,
1382 (long long) left, (long long) ccn,
1383 (long long) ccl, (long long) off));
1384
1385 if (ntfs_cntob(ccl) < off) {
1386 off -= ntfs_cntob(ccl);
1387 cnt++;
1388 continue;
1389 }
1390 if (ccn || ip->i_number == NTFS_BOOTINO) {
1391 ccl -= ntfs_btocn(off);
1392 cn = ccn + ntfs_btocn(off);
1393 off = ntfs_btocnoff(off);
1394
1395 while (left && ccl) {
1396 /*
1397 * Always read single clusters at a
1398 * time - we need to avoid reading
1399 * differently-sized blocks at the
1400 * same disk offsets to avoid
1401 * confusing the buffer cache.
1402 */
1403 tocopy = MIN(left,
1404 ntfs_cntob(1) - off);
1405 cl = ntfs_btocl(tocopy + off);
1406 KASSERT(cl == 1 &&
1407 tocopy <= ntfs_cntob(1));
1408
1409 ddprintf(("%s: read: cn: 0x%qx cl: %qu,"
1410 " off: %qd len: %qu, left: %qu\n",
1411 __func__, (long long) cn,
1412 (long long) cl,
1413 (long long) off,
1414 (long long) tocopy,
1415 (long long) left));
1416 error = bread(ntmp->ntm_devvp,
1417 ntfs_cntobn(cn),
1418 ntfs_cntob(cl),
1419 0, &bp);
1420 if (error) {
1421 return (error);
1422 }
1423 if (uio) {
1424 uiomove((char *)bp->b_data + off,
1425 tocopy, uio);
1426 } else {
1427 memcpy(data, (char *)bp->b_data + off,
1428 tocopy);
1429 }
1430 brelse(bp, 0);
1431 data = (char *)data + tocopy;
1432 *initp += tocopy;
1433 off = 0;
1434 left -= tocopy;
1435 cn += cl;
1436 ccl -= cl;
1437 }
1438 } else {
1439 tocopy = MIN(left, ntfs_cntob(ccl) - off);
1440 ddprintf(("%s: hole: ccn: 0x%qx ccl: %qu, "
1441 "off: %qd, len: %qu, left: %qu\n", __func__,
1442 (long long) ccn, (long long) ccl,
1443 (long long) off, (long long) tocopy,
1444 (long long) left));
1445 left -= tocopy;
1446 off = 0;
1447 if (uio) {
1448 char vbuf[] = "";
1449 size_t remains = tocopy;
1450 for (; remains; remains--)
1451 uiomove(vbuf, 1, uio);
1452 } else
1453 memset(data, 0, tocopy);
1454 data = (char *)data + tocopy;
1455 }
1456 cnt++;
1457 }
1458 if (left) {
1459 printf("%s: POSSIBLE RUN ERROR\n", __func__);
1460 error = E2BIG;
1461 }
1462 } else {
1463 ddprintf(("%s: data is in mft record\n", __func__));
1464 if (uio)
1465 uiomove((char *)vap->va_datap + roff, rsize, uio);
1466 else
1467 memcpy(rdata, (char *)vap->va_datap + roff, rsize);
1468 *initp += rsize;
1469 }
1470
1471 return (error);
1472 }
1473
1474 /*
1475 * This is one of the read routines.
1476 */
1477 int
ntfs_readattr_plain(struct ntfsmount * ntmp,struct ntnode * ip,u_int32_t attrnum,const char * attrname,off_t roff,size_t rsize,void * rdata,size_t * initp,struct uio * uio)1478 ntfs_readattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1479 u_int32_t attrnum, const char *attrname, off_t roff, size_t rsize,
1480 void *rdata, size_t *initp, struct uio *uio)
1481 {
1482 size_t init;
1483 int error = 0;
1484 off_t off = roff, left = rsize, toread;
1485 void *data = rdata;
1486 struct ntvattr *vap;
1487 *initp = 0;
1488
1489 while (left) {
1490 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1491 ntfs_btocn(off), &vap);
1492 if (error)
1493 return (error);
1494 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1495 ddprintf(("%s: o: %qd, s: %qd (%qu - %qu)\n", __func__,
1496 (long long) off, (long long) toread,
1497 (long long) vap->va_vcnstart,
1498 (long long) vap->va_vcnend));
1499 error = ntfs_readntvattr_plain(ntmp, ip, vap,
1500 off - ntfs_cntob(vap->va_vcnstart),
1501 toread, data, &init, uio);
1502 if (error) {
1503 printf("%s: ntfs_readntvattr_plain failed: o: %qd, "
1504 "s: %qd\n", __func__,
1505 (long long) off, (long long) toread);
1506 printf("%s: attrib: %qu - %qu\n", __func__,
1507 (long long) vap->va_vcnstart,
1508 (long long) vap->va_vcnend);
1509 ntfs_ntvattrrele(vap);
1510 break;
1511 }
1512 ntfs_ntvattrrele(vap);
1513 left -= toread;
1514 off += toread;
1515 data = (char *)data + toread;
1516 *initp += init;
1517 }
1518
1519 return (error);
1520 }
1521
1522 /*
1523 * This is one of the read routines.
1524 */
1525 int
ntfs_readattr(struct ntfsmount * ntmp,struct ntnode * ip,u_int32_t attrnum,const char * attrname,off_t roff,size_t rsize,void * rdata,struct uio * uio)1526 ntfs_readattr(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t attrnum,
1527 const char *attrname, off_t roff, size_t rsize, void *rdata,
1528 struct uio *uio)
1529 {
1530 int error = 0;
1531 struct ntvattr *vap;
1532 size_t init;
1533
1534 ddprintf(("%s: reading %llu: 0x%x, from %qd size %qu bytes\n",
1535 __func__, (unsigned long long)ip->i_number, attrnum,
1536 (long long)roff, (long long)rsize));
1537
1538 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
1539 if (error)
1540 return (error);
1541
1542 if ((roff > vap->va_datalen) ||
1543 (roff + rsize > vap->va_datalen)) {
1544 printf("%s: offset too big: %qd (%qd) > %qu\n", __func__,
1545 (long long) roff, (long long) (roff + rsize),
1546 (long long) vap->va_datalen);
1547 ntfs_ntvattrrele(vap);
1548 return (E2BIG);
1549 }
1550 if (vap->va_compression && vap->va_compressalg) {
1551 u_int8_t *cup, *uup;
1552 off_t off, left, tocopy;
1553 void *data;
1554 cn_t cn;
1555
1556 left = rsize;
1557 data = rdata;
1558 ddprintf(("%s: compression: %d\n", __func__,
1559 vap->va_compressalg));
1560
1561 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
1562 M_NTFSDECOMP, M_WAITOK);
1563 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
1564 M_NTFSDECOMP, M_WAITOK);
1565
1566 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
1567 off = roff - ntfs_cntob(cn);
1568
1569 while (left) {
1570 error = ntfs_readattr_plain(ntmp, ip, attrnum,
1571 attrname, ntfs_cntob(cn),
1572 ntfs_cntob(NTFS_COMPUNIT_CL), cup, &init, NULL);
1573 if (error)
1574 break;
1575
1576 tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
1577
1578 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
1579 if (uio)
1580 uiomove(cup + off, tocopy, uio);
1581 else
1582 memcpy(data, cup + off, tocopy);
1583 } else if (init == 0) {
1584 if (uio) {
1585 char vbuf[] = "";
1586 size_t remains = tocopy;
1587 for (; remains; remains--)
1588 uiomove(vbuf, 1, uio);
1589 }
1590 else
1591 memset(data, 0, tocopy);
1592 } else {
1593 error = ntfs_uncompunit(ntmp, uup, cup);
1594 if (error)
1595 break;
1596 if (uio)
1597 uiomove(uup + off, tocopy, uio);
1598 else
1599 memcpy(data, uup + off, tocopy);
1600 }
1601
1602 left -= tocopy;
1603 data = (char *)data + tocopy;
1604 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
1605 cn += NTFS_COMPUNIT_CL;
1606 }
1607
1608 free(uup, M_NTFSDECOMP);
1609 free(cup, M_NTFSDECOMP);
1610 } else
1611 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
1612 roff, rsize, rdata, &init, uio);
1613 ntfs_ntvattrrele(vap);
1614 return (error);
1615 }
1616
1617 #if UNUSED_CODE
1618 int
ntfs_parserun(cn_t * cn,cn_t * cl,u_int8_t * run,u_long len,u_long * off)1619 ntfs_parserun(cn_t *cn, cn_t *cl, u_int8_t *run, u_long len, u_long *off)
1620 {
1621 u_int8_t sz;
1622 int i;
1623
1624 if (NULL == run) {
1625 printf("%s: run == NULL\n", __func__);
1626 return (EINVAL);
1627 }
1628 sz = run[(*off)++];
1629 if (0 == sz) {
1630 printf("%s: trying to go out of run\n", __func__);
1631 return (E2BIG);
1632 }
1633 *cl = 0;
1634 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1635 printf("%s: bad run: length too big: sz: 0x%02x "
1636 "(%ld < %ld + sz)\n", __func__, sz, len, *off);
1637 return (EINVAL);
1638 }
1639 for (i = 0; i < (sz & 0xF); i++)
1640 *cl += (u_int32_t) run[(*off)++] << (i << 3);
1641
1642 sz >>= 4;
1643 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1644 printf("%s: bad run: length too big: sz: 0x%02x "
1645 "(%ld < %ld + sz)\n", __func__, sz, len, *off);
1646 return (EINVAL);
1647 }
1648 for (i = 0; i < (sz & 0xF); i++)
1649 *cn += (u_int32_t) run[(*off)++] << (i << 3);
1650
1651 return (0);
1652 }
1653 #endif
1654
1655 /*
1656 * Process fixup routine on given buffer.
1657 */
1658 int
ntfs_procfixups(struct ntfsmount * ntmp,u_int32_t magic,void * xbufv,size_t len)1659 ntfs_procfixups(struct ntfsmount *ntmp, u_int32_t magic, void *xbufv,
1660 size_t len)
1661 {
1662 char *xbuf = xbufv;
1663 struct fixuphdr *fhp = (struct fixuphdr *) xbuf;
1664 int i;
1665 u_int16_t fixup;
1666 u_int16_t *fxp, *cfxp;
1667
1668 if (fhp->fh_magic == 0)
1669 return (EINVAL);
1670 if (fhp->fh_magic != magic) {
1671 printf("%s: magic doesn't match: %08x != %08x\n", __func__,
1672 fhp->fh_magic, magic);
1673 return (EINVAL);
1674 }
1675 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
1676 printf("%s: bad fixups number: %d for %ld bytes block\n",
1677 __func__, fhp->fh_fnum, (long)len); /* XXX printf kludge */
1678 return (EINVAL);
1679 }
1680 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
1681 printf("%s: invalid offset: %x", __func__, fhp->fh_foff);
1682 return (EINVAL);
1683 }
1684 fxp = (u_int16_t *) (xbuf + fhp->fh_foff);
1685 cfxp = (u_int16_t *) (xbuf + ntmp->ntm_bps - 2);
1686 fixup = *fxp++;
1687 for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
1688 if (*cfxp != fixup) {
1689 printf("%s: fixup %d doesn't match\n", __func__, i);
1690 return (EINVAL);
1691 }
1692 *cfxp = *fxp;
1693 cfxp = (u_int16_t *)((char *)cfxp + ntmp->ntm_bps);
1694 }
1695 return (0);
1696 }
1697
1698 #if UNUSED_CODE
1699 int
ntfs_runtocn(cn_t * cn,struct ntfsmount * ntmp,u_int8_t * run,u_long len,cn_t vcn)1700 ntfs_runtocn(cn_t *cn, struct ntfsmount *ntmp, u_int8_t *run, u_long len,
1701 cn_t vcn)
1702 {
1703 cn_t ccn = 0, ccl = 0;
1704 u_long off = 0;
1705 int error = 0;
1706
1707 #ifdef NTFS_DEBUG
1708 int i;
1709 printf("%s: run: %p, %ld bytes, vcn:%ld\n", __func__,
1710 run, len, (u_long) vcn);
1711 printf("%s: run: ", __func__);
1712 for (i = 0; i < len; i++)
1713 printf("0x%02x ", run[i]);
1714 printf("\n");
1715 #endif
1716
1717 if (NULL == run) {
1718 printf("%s: run == NULL\n", __func__);
1719 return (EINVAL);
1720 }
1721 do {
1722 if (run[off] == 0) {
1723 printf("%s: vcn too big\n", __func__);
1724 return (E2BIG);
1725 }
1726 vcn -= ccl;
1727 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
1728 if (error) {
1729 printf("%s: ntfs_parserun failed\n", __func__);
1730 return (error);
1731 }
1732 } while (ccl <= vcn);
1733 *cn = ccn + vcn;
1734 return (0);
1735 }
1736 #endif
1737
1738 /*
1739 * this initializes toupper table & dependent variables to be ready for
1740 * later work
1741 */
1742 void
ntfs_toupper_init(void)1743 ntfs_toupper_init(void)
1744 {
1745 ntfs_toupper_tab = NULL;
1746 mutex_init(&ntfs_toupper_lock, MUTEX_DEFAULT, IPL_NONE);
1747 ntfs_toupper_usecount = 0;
1748 }
1749
1750 /*
1751 * if the ntfs_toupper_tab[] is filled already, just raise use count;
1752 * otherwise read the data from the filesystem we are currently mounting
1753 */
1754 int
ntfs_toupper_use(struct mount * mp,struct ntfsmount * ntmp)1755 ntfs_toupper_use(struct mount *mp, struct ntfsmount *ntmp)
1756 {
1757 int error = 0;
1758 struct vnode *vp;
1759
1760 /* get exclusive access */
1761 mutex_enter(&ntfs_toupper_lock);
1762
1763 /* only read the translation data from a file if it hasn't been
1764 * read already */
1765 if (ntfs_toupper_tab)
1766 goto out;
1767
1768 /*
1769 * Read in Unicode lowercase -> uppercase translation file.
1770 * XXX for now, just the first 256 entries are used anyway,
1771 * so don't bother reading more
1772 */
1773 ntfs_toupper_tab = malloc(256 * 256 * sizeof(*ntfs_toupper_tab),
1774 M_NTFSRDATA, M_WAITOK);
1775
1776 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, LK_EXCLUSIVE, &vp)))
1777 goto out;
1778 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
1779 0, 256 * 256 * sizeof(*ntfs_toupper_tab), (char *)ntfs_toupper_tab,
1780 NULL);
1781 vput(vp);
1782
1783 out:
1784 ntfs_toupper_usecount++;
1785 mutex_exit(&ntfs_toupper_lock);
1786 return (error);
1787 }
1788
1789 /*
1790 * lower the use count and if it reaches zero, free the memory
1791 * tied by toupper table
1792 */
1793 void
ntfs_toupper_unuse(void)1794 ntfs_toupper_unuse(void)
1795 {
1796 /* get exclusive access */
1797 mutex_enter(&ntfs_toupper_lock);
1798
1799 ntfs_toupper_usecount--;
1800 if (ntfs_toupper_usecount == 0) {
1801 free(ntfs_toupper_tab, M_NTFSRDATA);
1802 ntfs_toupper_tab = NULL;
1803 }
1804 #ifdef DIAGNOSTIC
1805 else if (ntfs_toupper_usecount < 0) {
1806 panic("ntfs_toupper_unuse(): use count negative: %d",
1807 ntfs_toupper_usecount);
1808 }
1809 #endif
1810
1811 /* release the lock */
1812 mutex_exit(&ntfs_toupper_lock);
1813 }
1814