1 /* $OpenBSD: ntfs_subr.c,v 1.53 2025/01/13 13:58:41 claudio Exp $ */
2 /* $NetBSD: ntfs_subr.c,v 1.4 2003/04/10 21:37:32 jdolecek Exp $ */
3
4 /*-
5 * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * Id: ntfs_subr.c,v 1.4 1999/05/12 09:43:01 semenu Exp
30 */
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/namei.h>
35 #include <sys/kernel.h>
36 #include <sys/vnode.h>
37 #include <sys/lock.h>
38 #include <sys/mount.h>
39 #include <sys/buf.h>
40 #include <sys/malloc.h>
41 #include <sys/rwlock.h>
42 #include <sys/specdev.h>
43
44 /* #define NTFS_DEBUG 1 */
45 #include <ntfs/ntfs.h>
46 #include <ntfs/ntfsmount.h>
47 #include <ntfs/ntfs_inode.h>
48 #include <ntfs/ntfs_vfsops.h>
49 #include <ntfs/ntfs_subr.h>
50 #include <ntfs/ntfs_compr.h>
51 #include <ntfs/ntfs_ihash.h>
52
53 #if defined(NTFS_DEBUG)
54 int ntfs_debug = NTFS_DEBUG;
55 #endif
56
57 /* Local struct used in ntfs_ntlookupfile() */
58 struct ntfs_lookup_ctx {
59 u_int32_t aoff;
60 u_int32_t rdsize;
61 cn_t cn;
62 struct ntfs_lookup_ctx *prev;
63 };
64
65 int ntfs_ntlookupattr(struct ntfsmount *, const char *, int, int *, char **);
66 int ntfs_findvattr(struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t);
67 int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
68 int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
69
70 /* table for mapping Unicode chars into uppercase; it's filled upon first
71 * ntfs mount, freed upon last ntfs umount */
72 static wchar *ntfs_toupper_tab;
73 #define NTFS_U28(ch) ((((ch) & 0xE0) == 0) ? '_' : (ch) & 0xFF)
74 #define NTFS_TOUPPER(ch) (ntfs_toupper_tab[(unsigned char)(ch)])
75 struct rwlock ntfs_toupper_lock = RWLOCK_INITIALIZER("ntfs_toupper");
76 static signed int ntfs_toupper_usecount;
77
78 /* support macro for ntfs_ntvattrget() */
79 #define NTFS_AALPCMP(aalp,type,name,namelen) ( \
80 (aalp->al_type == type) && (aalp->al_namelen == namelen) && \
81 !ntfs_uastrcmp(ntmp, aalp->al_name,aalp->al_namelen,name,namelen) )
82
83 /*
84 *
85 */
86 int
ntfs_ntvattrrele(struct ntvattr * vap)87 ntfs_ntvattrrele(struct ntvattr *vap)
88 {
89 DPRINTF("ntfs_ntvattrrele: ino: %u, type: 0x%x\n",
90 vap->va_ip->i_number, vap->va_type);
91
92 ntfs_ntrele(vap->va_ip);
93
94 return (0);
95 }
96
97 /*
98 * find the attribute in the ntnode
99 */
100 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)101 ntfs_findvattr(struct ntfsmount *ntmp, struct ntnode *ip,
102 struct ntvattr **lvapp, struct ntvattr **vapp, u_int32_t type,
103 const char *name, size_t namelen, cn_t vcn)
104 {
105 int error;
106 struct ntvattr *vap;
107
108 if((ip->i_flag & IN_LOADED) == 0) {
109 DPRINTF("ntfs_findvattr: node not loaded, ino: %u\n",
110 ip->i_number);
111 error = ntfs_loadntnode(ntmp,ip);
112 if (error) {
113 printf("ntfs_findvattr: FAILED TO LOAD INO: %d\n",
114 ip->i_number);
115 return (error);
116 }
117 } else {
118 /* Update LRU loaded list. */
119 TAILQ_REMOVE(&ntmp->ntm_ntnodeq, ip, i_loaded);
120 TAILQ_INSERT_HEAD(&ntmp->ntm_ntnodeq, ip, i_loaded);
121 }
122
123 *lvapp = NULL;
124 *vapp = NULL;
125 LIST_FOREACH(vap, &ip->i_valist, va_list) {
126 DDPRINTF("ntfs_findvattr: type: 0x%x, vcn: %llu - %llu\n",
127 vap->va_type, vap->va_vcnstart, vap->va_vcnend);
128 if ((vap->va_type == type) &&
129 (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
130 (vap->va_namelen == namelen) &&
131 (strncmp(name, vap->va_name, namelen) == 0)) {
132 *vapp = vap;
133 ntfs_ntref(vap->va_ip);
134 return (0);
135 }
136 if (vap->va_type == NTFS_A_ATTRLIST)
137 *lvapp = vap;
138 }
139
140 return (-1);
141 }
142
143 /*
144 * Search attribute specified in ntnode (load ntnode if necessary).
145 * If not found but ATTR_A_ATTRLIST present, read it in and search through.
146 * VOP_VGET node needed, and lookup through its ntnode (load if necessary).
147 *
148 * ntnode should be locked
149 */
150 int
ntfs_ntvattrget(struct ntfsmount * ntmp,struct ntnode * ip,u_int32_t type,const char * name,cn_t vcn,struct ntvattr ** vapp)151 ntfs_ntvattrget(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t type,
152 const char *name, cn_t vcn, struct ntvattr **vapp)
153 {
154 struct ntvattr *lvap = NULL;
155 struct attr_attrlist *aalp;
156 struct attr_attrlist *nextaalp;
157 struct vnode *newvp;
158 struct ntnode *newip;
159 caddr_t alpool;
160 size_t namelen, len;
161 int error;
162
163 *vapp = NULL;
164
165 if (name) {
166 DPRINTF("ntfs_ntvattrget: ino: %u, type: 0x%x, name: %s, "
167 "vcn: %llu\n", ip->i_number, type, name, vcn);
168 namelen = strlen(name);
169 } else {
170 DPRINTF("ntfs_ntvattrget: ino: %u, type: 0x%x, vcn: %llu\n",
171 ip->i_number, type, vcn);
172 name = "";
173 namelen = 0;
174 }
175
176 error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
177 if (error >= 0)
178 return (error);
179
180 if (!lvap) {
181 DPRINTF("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: ino: %u, "
182 "type: 0x%x, name: %s, vcn: %llu\n", ip->i_number, type,
183 name, vcn);
184 return (ENOENT);
185 }
186 /* Scan $ATTRIBUTE_LIST for requested attribute */
187 len = lvap->va_datalen;
188 alpool = malloc(len, M_TEMP, M_WAITOK);
189 error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
190 NULL);
191 if (error)
192 goto out;
193
194 aalp = (struct attr_attrlist *) alpool;
195 nextaalp = NULL;
196
197 for(; len > 0; aalp = nextaalp) {
198 DPRINTF("ntfs_ntvattrget: attrlist: ino: %u, attr: 0x%x, "
199 "vcn: %llu\n", aalp->al_inumber, aalp->al_type,
200 aalp->al_vcnstart);
201
202 if (len > aalp->reclen) {
203 nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
204 } else {
205 nextaalp = NULL;
206 }
207 len -= aalp->reclen;
208
209 if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
210 (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
211 NTFS_AALPCMP(nextaalp, type, name, namelen)))
212 continue;
213
214 DPRINTF("ntfs_ntvattrget: attribute in ino: %u\n",
215 aalp->al_inumber);
216
217 /* this is not a main record, so we can't use just plain
218 vget() */
219 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
220 NTFS_A_DATA, NULL, LK_EXCLUSIVE,
221 VG_EXT, &newvp);
222 if (error) {
223 printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
224 aalp->al_inumber);
225 goto out;
226 }
227 newip = VTONT(newvp);
228 /* XXX have to lock ntnode */
229 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
230 type, name, namelen, vcn);
231 vput(newvp);
232 if (error == 0)
233 goto out;
234 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
235 break;
236 }
237 error = ENOENT;
238
239 DPRINTF("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: ino: %u, type: 0x%x, "
240 "name: %.*s, vcn: %llu\n", ip->i_number, type,
241 (unsigned int)namelen, name, vcn);
242 out:
243 free(alpool, M_TEMP, 0);
244 return (error);
245 }
246
247 /*
248 * Read ntnode from disk, make ntvattr list.
249 *
250 * ntnode should be locked
251 */
252 int
ntfs_loadntnode(struct ntfsmount * ntmp,struct ntnode * ip)253 ntfs_loadntnode(struct ntfsmount *ntmp, struct ntnode *ip)
254 {
255 struct ntnode *oip;
256 struct ntvattr *vap;
257 struct filerec *mfrp;
258 struct attr *ap;
259 daddr_t bn;
260 int error,off;
261
262 DPRINTF("ntfs_loadntnode: loading ino: %u\n", ip->i_number);
263
264 KASSERT((ip->i_flag & IN_LOADED) == 0);
265
266 if (ntmp->ntm_ntnodes >= LOADED_NTNODE_HI) {
267 oip = TAILQ_LAST(&ntmp->ntm_ntnodeq, ntnodeq);
268 TAILQ_REMOVE(&ntmp->ntm_ntnodeq, oip, i_loaded);
269 ntmp->ntm_ntnodes--;
270
271 DPRINTF("ntfs_loadntnode: unloading ino: %u\n", oip->i_number);
272
273 KASSERT((oip->i_flag & IN_LOADED));
274 oip->i_flag &= ~IN_LOADED;
275 while ((vap = LIST_FIRST(&oip->i_valist)) != NULL) {
276 LIST_REMOVE(vap, va_list);
277 ntfs_freentvattr(vap);
278 }
279 }
280
281 mfrp = malloc(ntfs_bntob(ntmp->ntm_bpmftrec), M_TEMP, M_WAITOK);
282
283 if (ip->i_number < NTFS_SYSNODESNUM) {
284 struct buf *bp;
285
286 DPRINTF("ntfs_loadntnode: read system node\n");
287
288 bn = ntfs_cntobn(ntmp->ntm_mftcn) +
289 ntmp->ntm_bpmftrec * ip->i_number;
290
291 error = bread(ntmp->ntm_devvp, bn,
292 ntfs_bntob(ntmp->ntm_bpmftrec), &bp);
293 if (error) {
294 printf("ntfs_loadntnode: BREAD FAILED\n");
295 brelse(bp);
296 goto out;
297 }
298 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
299 brelse(bp);
300 } else {
301 struct vnode *vp;
302
303 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
304 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
305 ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
306 ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
307 if (error) {
308 printf("ntfs_loadntnode: ntfs_readattr failed\n");
309 goto out;
310 }
311 }
312
313 /* Check if magic and fixups are correct */
314 error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp,
315 ntfs_bntob(ntmp->ntm_bpmftrec));
316 if (error) {
317 printf("ntfs_loadntnode: BAD MFT RECORD %d\n",
318 (u_int32_t) ip->i_number);
319 goto out;
320 }
321
322 DPRINTF("ntfs_loadntnode: load attrs for ino: %u\n", ip->i_number);
323 off = mfrp->fr_attroff;
324 ap = (struct attr *) ((caddr_t)mfrp + off);
325
326 LIST_INIT(&ip->i_valist);
327
328 while (ap->a_hdr.a_type != -1) {
329 error = ntfs_attrtontvattr(ntmp, &vap, ap);
330 if (error)
331 break;
332 vap->va_ip = ip;
333
334 LIST_INSERT_HEAD(&ip->i_valist, vap, va_list);
335
336 off += ap->a_hdr.reclen;
337 ap = (struct attr *) ((caddr_t)mfrp + off);
338 }
339 if (error) {
340 printf("ntfs_loadntnode: failed to load attr ino: %d\n",
341 ip->i_number);
342 goto out;
343 }
344
345 ip->i_mainrec = mfrp->fr_mainrec;
346 ip->i_nlink = mfrp->fr_nlink;
347 ip->i_frflag = mfrp->fr_flags;
348
349 ip->i_flag |= IN_LOADED;
350
351 /* Add to loaded list. */
352 TAILQ_INSERT_HEAD(&ntmp->ntm_ntnodeq, ip, i_loaded);
353 ntmp->ntm_ntnodes++;
354
355 out:
356 free(mfrp, M_TEMP, 0);
357 return (error);
358 }
359
360 /*
361 * Routine locks ntnode and increase usecount, just opposite of
362 * ntfs_ntput().
363 */
364 int
ntfs_ntget(struct ntnode * ip)365 ntfs_ntget(struct ntnode *ip)
366 {
367 DPRINTF("ntfs_ntget: get ntnode %u: %p, usecount: %d\n",
368 ip->i_number, ip, ip->i_usecount);
369
370 ip->i_usecount++;
371
372 rw_enter_write(&ip->i_lock);
373
374 return 0;
375 }
376
377 /*
378 * Routine search ntnode in hash, if found: lock, inc usecount and return.
379 * If not in hash allocate structure for ntnode, prefill it, lock,
380 * inc count and return.
381 *
382 * ntnode returned locked
383 */
384 int
ntfs_ntlookup(struct ntfsmount * ntmp,ntfsino_t ino,struct ntnode ** ipp)385 ntfs_ntlookup(struct ntfsmount *ntmp, ntfsino_t ino, struct ntnode **ipp)
386 {
387 struct ntnode *ip;
388
389 DPRINTF("ntfs_ntlookup: looking for ntnode %u\n", ino);
390
391 retry:
392 if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
393 ntfs_ntget(ip);
394 DPRINTF("ntfs_ntlookup: ntnode %u: %p, usecount: %d\n",
395 ino, ip, ip->i_usecount);
396 *ipp = ip;
397 return (0);
398 }
399
400 ip = malloc(sizeof(*ip), M_NTFSNTNODE, M_WAITOK | M_ZERO);
401 DDPRINTF("ntfs_ntlookup: allocating ntnode: %u: %p\n", ino, ip);
402
403 /* Generic initialization */
404 ip->i_devvp = ntmp->ntm_devvp;
405 ip->i_dev = ntmp->ntm_dev;
406 ip->i_number = ino;
407 ip->i_mp = ntmp;
408
409 LIST_INIT(&ip->i_fnlist);
410 LIST_INIT(&ip->i_valist);
411 vref(ip->i_devvp);
412
413 /* init lock and lock the newborn ntnode */
414 rw_init(&ip->i_lock, "ntnode");
415 ntfs_ntget(ip);
416
417 if (ntfs_nthashins(ip) != 0) {
418 ntfs_ntput(ip);
419 goto retry;
420 }
421
422 *ipp = ip;
423
424 DPRINTF("ntfs_ntlookup: ntnode %u: %p, usecount: %d\n",
425 ino, ip, ip->i_usecount);
426
427 return (0);
428 }
429
430 /*
431 * Decrement usecount of ntnode and unlock it, if usecount reach zero,
432 * deallocate ntnode.
433 *
434 * ntnode should be locked on entry, and unlocked on return.
435 */
436 void
ntfs_ntput(struct ntnode * ip)437 ntfs_ntput(struct ntnode *ip)
438 {
439 struct ntfsmount *ntmp = ip->i_mp;
440 struct ntvattr *vap;
441
442 DPRINTF("ntfs_ntput: rele ntnode %u: %p, usecount: %d\n",
443 ip->i_number, ip, ip->i_usecount);
444
445 ip->i_usecount--;
446
447 #ifdef DIAGNOSTIC
448 if (ip->i_usecount < 0) {
449 panic("ntfs_ntput: ino: %d usecount: %d ",
450 ip->i_number,ip->i_usecount);
451 }
452 #endif
453
454 if (ip->i_usecount > 0) {
455 rw_exit_write(&ip->i_lock);
456 return;
457 }
458
459 DPRINTF("ntfs_ntput: deallocating ntnode: %u\n", ip->i_number);
460
461 if (LIST_FIRST(&ip->i_fnlist))
462 panic("ntfs_ntput: ntnode has fnodes");
463
464 ntfs_nthashrem(ip);
465
466 /* Remove from loaded list. */
467 if (ip->i_flag & IN_LOADED) {
468 TAILQ_REMOVE(&ntmp->ntm_ntnodeq, ip, i_loaded);
469 ntmp->ntm_ntnodes--;
470 }
471
472 while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) {
473 LIST_REMOVE(vap, va_list);
474 ntfs_freentvattr(vap);
475 }
476
477 vrele(ip->i_devvp);
478 free(ip, M_NTFSNTNODE, 0);
479 }
480
481 /*
482 * increment usecount of ntnode
483 */
484 void
ntfs_ntref(struct ntnode * ip)485 ntfs_ntref(struct ntnode *ip)
486 {
487 ip->i_usecount++;
488
489 DPRINTF("ntfs_ntref: ino %u, usecount: %d\n",
490 ip->i_number, ip->i_usecount);
491 }
492
493 /*
494 * Decrement usecount of ntnode.
495 */
496 void
ntfs_ntrele(struct ntnode * ip)497 ntfs_ntrele(struct ntnode *ip)
498 {
499 DPRINTF("ntfs_ntrele: rele ntnode %u: %p, usecount: %d\n",
500 ip->i_number, ip, ip->i_usecount);
501
502 ip->i_usecount--;
503
504 if (ip->i_usecount < 0)
505 panic("ntfs_ntrele: ino: %d usecount: %d ",
506 ip->i_number,ip->i_usecount);
507 }
508
509 /*
510 * Deallocate all memory allocated for ntvattr
511 */
512 void
ntfs_freentvattr(struct ntvattr * vap)513 ntfs_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, 0);
518 if (vap->va_vruncl)
519 free(vap->va_vruncl, M_NTFSRUN, 0);
520 } else {
521 if (vap->va_datap)
522 free(vap->va_datap, M_NTFSRDATA, 0);
523 }
524 free(vap, M_NTFSNTVATTR, 0);
525 }
526
527 /*
528 * Convert disk image of attribute into ntvattr structure,
529 * runs are expanded also.
530 */
531 int
ntfs_attrtontvattr(struct ntfsmount * ntmp,struct ntvattr ** rvapp,struct attr * rap)532 ntfs_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("type: 0x%x, index: %u", vap->va_type, vap->va_index);
549
550 vap->va_namelen = rap->a_hdr.a_namelen;
551 if (rap->a_hdr.a_namelen) {
552 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
553 DDPRINTF(", name:[");
554 for (i = 0; i < vap->va_namelen; i++) {
555 vap->va_name[i] = unp[i];
556 DDPRINTF("%c", vap->va_name[i]);
557 }
558 DDPRINTF("]");
559 }
560 if (vap->va_flag & NTFS_AF_INRUN) {
561 DDPRINTF(", nonres.");
562 vap->va_datalen = rap->a_nr.a_datalen;
563 vap->va_allocated = rap->a_nr.a_allocated;
564 vap->va_vcnstart = rap->a_nr.a_vcnstart;
565 vap->va_vcnend = rap->a_nr.a_vcnend;
566 vap->va_compressalg = rap->a_nr.a_compressalg;
567 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
568 &(vap->va_vruncnt),
569 (caddr_t) rap + rap->a_nr.a_dataoff);
570 } else {
571 vap->va_compressalg = 0;
572 DDPRINTF(", res.");
573 vap->va_datalen = rap->a_r.a_datalen;
574 vap->va_allocated = rap->a_r.a_datalen;
575 vap->va_vcnstart = 0;
576 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
577 vap->va_datap = malloc(vap->va_datalen, M_NTFSRDATA, M_WAITOK);
578 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
579 rap->a_r.a_datalen);
580 }
581 DDPRINTF(", len: %llu", vap->va_datalen);
582
583 if (error)
584 free(vap, M_NTFSNTVATTR, 0);
585 else
586 *rvapp = vap;
587
588 DDPRINTF("\n");
589
590 return (error);
591 }
592
593 /*
594 * Expand run into more utilizable and more memory eating format.
595 */
596 int
ntfs_runtovrun(cn_t ** rcnp,cn_t ** rclp,u_long * rcntp,u_int8_t * run)597 ntfs_runtovrun(cn_t **rcnp, cn_t **rclp, u_long *rcntp, u_int8_t *run)
598 {
599 u_int32_t off;
600 u_int32_t sz, i;
601 cn_t *cn;
602 cn_t *cl;
603 u_long cnt;
604 cn_t prev;
605 cn_t tmp;
606
607 off = 0;
608 cnt = 0;
609 while (run[off]) {
610 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
611 cnt++;
612 }
613 cn = mallocarray(cnt, sizeof(cn_t), M_NTFSRUN, M_WAITOK);
614 cl = mallocarray(cnt, sizeof(cn_t), M_NTFSRUN, M_WAITOK);
615
616 off = 0;
617 cnt = 0;
618 prev = 0;
619 while (run[off]) {
620
621 sz = run[off++];
622 cl[cnt] = 0;
623
624 for (i = 0; i < (sz & 0xF); i++)
625 cl[cnt] += (u_int32_t) run[off++] << (i << 3);
626
627 sz >>= 4;
628 if (run[off + sz - 1] & 0x80) {
629 tmp = ((u_int64_t) - 1) << (sz << 3);
630 for (i = 0; i < sz; i++)
631 tmp |= (u_int64_t) run[off++] << (i << 3);
632 } else {
633 tmp = 0;
634 for (i = 0; i < sz; i++)
635 tmp |= (u_int64_t) run[off++] << (i << 3);
636 }
637 if (tmp)
638 prev = cn[cnt] = prev + tmp;
639 else
640 cn[cnt] = tmp;
641
642 cnt++;
643 }
644 *rcnp = cn;
645 *rclp = cl;
646 *rcntp = cnt;
647 return (0);
648 }
649
650 /*
651 * Compare unicode and ascii string case insens.
652 */
653 int
ntfs_uastricmp(struct ntfsmount * ntmp,const wchar * ustr,size_t ustrlen,const char * astr,size_t astrlen)654 ntfs_uastricmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
655 const char *astr, size_t astrlen)
656 {
657 size_t i;
658 int res;
659 const char *astrend = astr + astrlen;
660
661 for (i = 0; i < ustrlen && astr < astrend; i++) {
662 res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i]),
663 NTFS_TOUPPER((*ntmp->ntm_wget)(&astr)) );
664 if (res)
665 return res;
666 }
667
668 if (i == ustrlen && astr == astrend)
669 return 0;
670 else if (i == ustrlen)
671 return -1;
672 else
673 return 1;
674 }
675
676 /*
677 * Compare unicode and ascii string case sens.
678 */
679 int
ntfs_uastrcmp(struct ntfsmount * ntmp,const wchar * ustr,size_t ustrlen,const char * astr,size_t astrlen)680 ntfs_uastrcmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
681 const char *astr, size_t astrlen)
682 {
683 size_t i;
684 int res;
685 const char *astrend = astr + astrlen;
686
687 for (i = 0; (i < ustrlen) && (astr < astrend); i++) {
688 res = (*ntmp->ntm_wcmp)(ustr[i], (*ntmp->ntm_wget)(&astr));
689 if (res)
690 return res;
691 }
692
693 if (i == ustrlen && astr == astrend)
694 return 0;
695 else if (i == ustrlen)
696 return -1;
697 else
698 return 1;
699 }
700
701 /*
702 * Search fnode in ntnode, if not found allocate and preinitialize.
703 *
704 * ntnode should be locked on entry.
705 */
706 int
ntfs_fget(struct ntfsmount * ntmp,struct ntnode * ip,int attrtype,char * attrname,struct fnode ** fpp)707 ntfs_fget(struct ntfsmount *ntmp, struct ntnode *ip, int attrtype,
708 char *attrname, struct fnode **fpp)
709 {
710 struct fnode *fp;
711
712 DPRINTF("ntfs_fget: ino: %u, attrtype: 0x%x, attrname: %s\n",
713 ip->i_number, attrtype, attrname ? attrname : "");
714 *fpp = NULL;
715 LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist) {
716 DPRINTF("ntfs_fget: fnode: attrtype: %u, attrname: %s\n",
717 fp->f_attrtype, fp->f_attrname ? fp->f_attrname : "");
718
719 if ((attrtype == fp->f_attrtype) &&
720 ((!attrname && !fp->f_attrname) ||
721 (attrname && fp->f_attrname &&
722 !strcmp(attrname,fp->f_attrname)))){
723 DPRINTF("ntfs_fget: found existed: %p\n", fp);
724 *fpp = fp;
725 }
726 }
727
728 if (*fpp)
729 return (0);
730
731 fp = malloc(sizeof(*fp), M_NTFSFNODE, M_WAITOK | M_ZERO);
732 DPRINTF("ntfs_fget: allocating fnode: %p\n", fp);
733
734 fp->f_ip = ip;
735 fp->f_attrname = attrname;
736 if (fp->f_attrname) fp->f_flag |= FN_AATTRNAME;
737 fp->f_attrtype = attrtype;
738
739 ntfs_ntref(ip);
740
741 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
742
743 *fpp = fp;
744
745 return (0);
746 }
747
748 /*
749 * Deallocate fnode, remove it from ntnode's fnode list.
750 *
751 * ntnode should be locked.
752 */
753 void
ntfs_frele(struct fnode * fp)754 ntfs_frele(struct fnode *fp)
755 {
756 struct ntnode *ip = FTONT(fp);
757
758 DPRINTF("ntfs_frele: fnode: %p for %u: %p\n", fp, ip->i_number, ip);
759
760 DPRINTF("ntfs_frele: deallocating fnode\n");
761 LIST_REMOVE(fp,f_fnlist);
762 if (fp->f_flag & FN_AATTRNAME)
763 free(fp->f_attrname, M_TEMP, 0);
764 if (fp->f_dirblbuf)
765 free(fp->f_dirblbuf, M_NTFSDIR, 0);
766 free(fp, M_NTFSFNODE, 0);
767 ntfs_ntrele(ip);
768 }
769
770 /*
771 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME],
772 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
773 * If $ATTR_TYPE not specified, ATTR_A_DATA assumed.
774 */
775 int
ntfs_ntlookupattr(struct ntfsmount * ntmp,const char * name,int namelen,int * attrtype,char ** attrname)776 ntfs_ntlookupattr(struct ntfsmount *ntmp, const char *name, int namelen,
777 int *attrtype, char **attrname)
778 {
779 const char *sys;
780 size_t syslen, i;
781 struct ntvattrdef *adp;
782
783 if (namelen == 0)
784 return (0);
785
786 if (name[0] == '$') {
787 sys = name;
788 for (syslen = 0; syslen < namelen; syslen++) {
789 if(sys[syslen] == ':') {
790 name++;
791 namelen--;
792 break;
793 }
794 }
795 name += syslen;
796 namelen -= syslen;
797
798 adp = ntmp->ntm_ad;
799 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
800 if (syslen != adp->ad_namelen ||
801 strncmp(sys, adp->ad_name, syslen) != 0)
802 continue;
803
804 *attrtype = adp->ad_type;
805 goto out;
806 }
807 return (ENOENT);
808 }
809
810 out:
811 if (namelen) {
812 *attrname = malloc(namelen + 1, M_TEMP, M_WAITOK);
813 memcpy(*attrname, name, namelen);
814 (*attrname)[namelen] = '\0';
815 *attrtype = NTFS_A_DATA;
816 }
817
818 return (0);
819 }
820
821 /*
822 * Lookup specified node for filename, matching cnp, return fnode filled.
823 */
824 int
ntfs_ntlookupfile(struct ntfsmount * ntmp,struct vnode * vp,struct componentname * cnp,struct vnode ** vpp)825 ntfs_ntlookupfile(struct ntfsmount *ntmp, struct vnode *vp,
826 struct componentname *cnp, struct vnode **vpp)
827 {
828 struct fnode *fp = VTOF(vp);
829 struct ntnode *ip = FTONT(fp);
830 struct ntvattr *vap = NULL; /* Root attribute */
831 cn_t cn = 0; /* VCN in current attribute */
832 caddr_t rdbuf = NULL; /* Buffer to read directory's blocks */
833 u_int32_t blsize;
834 u_int32_t rdsize; /* Length of data to read from current block */
835 struct attr_indexentry *iep;
836 int error, res, anamelen, fnamelen;
837 const char *fname,*aname;
838 u_int32_t aoff;
839 int attrtype = NTFS_A_DATA;
840 char *attrname = NULL;
841 struct fnode *nfp;
842 struct vnode *nvp;
843 enum vtype f_type;
844 int fullscan = 0;
845 struct ntfs_lookup_ctx *lookup_ctx = NULL, *tctx;
846
847 error = ntfs_ntget(ip);
848 if (error)
849 return (error);
850
851 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
852 if (error || (vap->va_flag & NTFS_AF_INRUN)) {
853 error = ENOTDIR;
854 goto fail;
855 }
856
857 /*
858 * Divide file name into: foofilefoofilefoofile[:attrspec]
859 * Store like this: fname:fnamelen [aname:anamelen]
860 */
861 fname = cnp->cn_nameptr;
862 aname = NULL;
863 anamelen = 0;
864 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
865 if(fname[fnamelen] == ':') {
866 aname = fname + fnamelen + 1;
867 anamelen = cnp->cn_namelen - fnamelen - 1;
868 DPRINTF("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
869 fname, fnamelen, aname, anamelen);
870 break;
871 }
872
873 blsize = vap->va_a_iroot->ir_size;
874 DPRINTF("ntfs_ntlookupfile: blksz: %u\n", blsize);
875
876 rdbuf = malloc(blsize, M_TEMP, M_WAITOK);
877
878 loop:
879 rdsize = vap->va_datalen;
880 DPRINTF("ntfs_ntlookupfile: rdsz: %u\n", rdsize);
881
882 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
883 0, rdsize, rdbuf, NULL);
884 if (error)
885 goto fail;
886
887 aoff = sizeof(struct attr_indexroot);
888
889 do {
890 iep = (struct attr_indexentry *) (rdbuf + aoff);
891
892 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
893 aoff += iep->reclen,
894 iep = (struct attr_indexentry *) (rdbuf + aoff))
895 {
896 DDPRINTF("scan: %u, %u\n", iep->ie_number,
897 iep->ie_fnametype);
898
899 /* check the name - the case-insensitive check
900 * has to come first, to break from this for loop
901 * if needed, so we can dive correctly */
902 res = ntfs_uastricmp(ntmp, iep->ie_fname,
903 iep->ie_fnamelen, fname, fnamelen);
904 if (!fullscan) {
905 if (res > 0) break;
906 if (res < 0) continue;
907 }
908
909 if (iep->ie_fnametype == 0 ||
910 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
911 {
912 res = ntfs_uastrcmp(ntmp, iep->ie_fname,
913 iep->ie_fnamelen, fname, fnamelen);
914 if (res != 0 && !fullscan) continue;
915 }
916
917 /* if we perform full scan, the file does not match
918 * and this is subnode, dive */
919 if (fullscan && res != 0) {
920 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
921 tctx = malloc(sizeof(struct ntfs_lookup_ctx),
922 M_TEMP, M_WAITOK);
923 tctx->aoff = aoff + iep->reclen;
924 tctx->rdsize = rdsize;
925 tctx->cn = cn;
926 tctx->prev = lookup_ctx;
927 lookup_ctx = tctx;
928 break;
929 } else
930 continue;
931 }
932
933 if (aname) {
934 error = ntfs_ntlookupattr(ntmp,
935 aname, anamelen,
936 &attrtype, &attrname);
937 if (error)
938 goto fail;
939 }
940
941 /* Check if we've found ourselves */
942 if ((iep->ie_number == ip->i_number) &&
943 (attrtype == fp->f_attrtype) &&
944 ((!attrname && !fp->f_attrname) ||
945 (attrname && fp->f_attrname &&
946 !strcmp(attrname, fp->f_attrname))))
947 {
948 vref(vp);
949 *vpp = vp;
950 error = 0;
951 goto fail;
952 }
953
954 /* free the buffer returned by ntfs_ntlookupattr() */
955 if (attrname) {
956 free(attrname, M_TEMP, 0);
957 attrname = NULL;
958 }
959
960 /* vget node, but don't load it */
961 error = ntfs_vgetex(ntmp->ntm_mountp,
962 iep->ie_number, attrtype, attrname,
963 LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
964 &nvp);
965 if (error)
966 goto fail;
967
968 nfp = VTOF(nvp);
969
970 if (nfp->f_flag & FN_VALID) {
971 *vpp = nvp;
972 goto fail;
973 }
974
975 nfp->f_fflag = iep->ie_fflag;
976 nfp->f_pnumber = iep->ie_fpnumber;
977 nfp->f_times = iep->ie_ftimes;
978
979 if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
980 (nfp->f_attrtype == NTFS_A_DATA) &&
981 (nfp->f_attrname == NULL))
982 f_type = VDIR;
983 else
984 f_type = VREG;
985
986 nvp->v_type = f_type;
987
988 if ((nfp->f_attrtype == NTFS_A_DATA) &&
989 (nfp->f_attrname == NULL))
990 {
991 /* Opening default attribute */
992 nfp->f_size = iep->ie_fsize;
993 nfp->f_allocated = iep->ie_fallocated;
994 nfp->f_flag |= FN_PRELOADED;
995 } else {
996 error = ntfs_filesize(ntmp, nfp,
997 &nfp->f_size, &nfp->f_allocated);
998 if (error) {
999 vput(nvp);
1000 goto fail;
1001 }
1002 }
1003
1004 nfp->f_flag &= ~FN_VALID;
1005 *vpp = nvp;
1006 goto fail;
1007 }
1008
1009 /* Dive if possible */
1010 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
1011 DPRINTF("ntfs_ntlookupfile: diving\n");
1012
1013 cn = *(cn_t *) (rdbuf + aoff +
1014 iep->reclen - sizeof(cn_t));
1015 rdsize = blsize;
1016
1017 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
1018 ntfs_cntob(cn), rdsize, rdbuf, NULL);
1019 if (error)
1020 goto fail;
1021
1022 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1023 rdbuf, rdsize);
1024 if (error)
1025 goto fail;
1026
1027 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
1028 0x18);
1029 } else if (fullscan && lookup_ctx) {
1030 cn = lookup_ctx->cn;
1031 aoff = lookup_ctx->aoff;
1032 rdsize = lookup_ctx->rdsize;
1033
1034 error = ntfs_readattr(ntmp, ip,
1035 (cn == 0) ? NTFS_A_INDXROOT : NTFS_A_INDX,
1036 "$I30", ntfs_cntob(cn), rdsize, rdbuf, NULL);
1037 if (error)
1038 goto fail;
1039
1040 if (cn != 0) {
1041 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1042 rdbuf, rdsize);
1043 if (error)
1044 goto fail;
1045 }
1046
1047 tctx = lookup_ctx;
1048 lookup_ctx = lookup_ctx->prev;
1049 free(tctx, M_TEMP, 0);
1050 } else {
1051 DPRINTF("ntfs_ntlookupfile: nowhere to dive :-(\n");
1052 error = ENOENT;
1053 break;
1054 }
1055 } while (1);
1056
1057 if (error == ENOENT) {
1058 /* perform full scan if no entry was found */
1059 if (!fullscan) {
1060 fullscan = 1;
1061 cn = 0; /* need zero, used by lookup_ctx */
1062
1063 DDPRINTF("ntfs_ntlookupfile: fullscan performed for: %.*s\n",
1064 (unsigned int)fnamelen, fname);
1065 goto loop;
1066 }
1067
1068 if ((cnp->cn_flags & ISLASTCN) &&
1069 (cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME))
1070 error = EJUSTRETURN;
1071 }
1072
1073 DPRINTF("finish\n");
1074
1075 fail:
1076 if (vap)
1077 ntfs_ntvattrrele(vap);
1078 if (rdbuf)
1079 free(rdbuf, M_TEMP, 0);
1080 if (attrname)
1081 free(attrname, M_TEMP, 0);
1082 if (lookup_ctx) {
1083 while(lookup_ctx) {
1084 tctx = lookup_ctx;
1085 lookup_ctx = lookup_ctx->prev;
1086 free(tctx, M_TEMP, 0);
1087 }
1088 }
1089 ntfs_ntput(ip);
1090 return (error);
1091 }
1092
1093 /*
1094 * Check if name type is permitted to show.
1095 */
1096 int
ntfs_isnamepermitted(struct ntfsmount * ntmp,struct attr_indexentry * iep)1097 ntfs_isnamepermitted(struct ntfsmount *ntmp, struct attr_indexentry *iep)
1098 {
1099 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
1100 return 1;
1101
1102 switch (iep->ie_fnametype) {
1103 case 2:
1104 DDPRINTF("ntfs_isnamepermitted: skipped DOS name\n");
1105 return 0;
1106 case 0: case 1: case 3:
1107 return 1;
1108 default:
1109 printf("ntfs_isnamepermitted: " \
1110 "WARNING! Unknown file name type: %d\n",
1111 iep->ie_fnametype);
1112 break;
1113 }
1114 return 0;
1115 }
1116
1117 /*
1118 * Read ntfs dir like stream of attr_indexentry, not like btree of them.
1119 * This is done by scanning $BITMAP:$I30 for busy clusters and reading them.
1120 * Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in
1121 * fnode, so we can skip toward record number num almost immediately.
1122 * Anyway this is rather slow routine. The problem is that we don't know
1123 * how many records are there in $INDEX_ALLOCATION:$I30 block.
1124 */
1125 int
ntfs_ntreaddir(struct ntfsmount * ntmp,struct fnode * fp,u_int32_t num,struct attr_indexentry ** riepp,struct proc * p)1126 ntfs_ntreaddir(struct ntfsmount *ntmp, struct fnode *fp, u_int32_t num,
1127 struct attr_indexentry **riepp, struct proc *p)
1128 {
1129 struct ntnode *ip = FTONT(fp);
1130 struct ntvattr *vap = NULL; /* IndexRoot attribute */
1131 struct ntvattr *bmvap = NULL; /* BitMap attribute */
1132 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */
1133 caddr_t rdbuf; /* Buffer to read directory's blocks */
1134 u_int8_t *bmp = NULL; /* Bitmap */
1135 u_int32_t blsize; /* Index allocation size (2048) */
1136 u_int32_t rdsize; /* Length of data to read */
1137 u_int32_t attrnum; /* Current attribute type */
1138 u_int32_t cpbl = 1; /* Clusters per directory block */
1139 u_int32_t blnum;
1140 struct attr_indexentry *iep;
1141 int error = ENOENT;
1142 u_int32_t aoff, cnum;
1143
1144 DPRINTF("ntfs_ntreaddir: read ino: %u, num: %u\n", ip->i_number, num);
1145 error = ntfs_ntget(ip);
1146 if (error)
1147 return (error);
1148
1149 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
1150 if (error) {
1151 error = ENOTDIR;
1152 goto fail;
1153 }
1154
1155 if (fp->f_dirblbuf == NULL) {
1156 fp->f_dirblsz = vap->va_a_iroot->ir_size;
1157 fp->f_dirblbuf = malloc(MAX(vap->va_datalen,fp->f_dirblsz),
1158 M_NTFSDIR, M_WAITOK);
1159 }
1160
1161 blsize = fp->f_dirblsz;
1162 rdbuf = fp->f_dirblbuf;
1163
1164 DPRINTF("ntfs_ntreaddir: rdbuf: %p, blsize: %u\n", rdbuf, blsize);
1165
1166 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
1167 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
1168 0, &bmvap);
1169 if (error) {
1170 error = ENOTDIR;
1171 goto fail;
1172 }
1173 bmp = malloc(bmvap->va_datalen, M_TEMP, M_WAITOK);
1174 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
1175 bmvap->va_datalen, bmp, NULL);
1176 if (error)
1177 goto fail;
1178
1179 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
1180 0, &iavap);
1181 if (error) {
1182 error = ENOTDIR;
1183 goto fail;
1184 }
1185 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
1186 DPRINTF("ntfs_ntreaddir: indexalloc: %llu, cpbl: %u\n",
1187 iavap->va_datalen, cpbl);
1188 } else {
1189 DPRINTF("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n");
1190 iavap = bmvap = NULL;
1191 bmp = NULL;
1192 }
1193
1194 /* Try use previous values */
1195 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
1196 attrnum = fp->f_lastdattr;
1197 aoff = fp->f_lastdoff;
1198 blnum = fp->f_lastdblnum;
1199 cnum = fp->f_lastdnum;
1200 } else {
1201 attrnum = NTFS_A_INDXROOT;
1202 aoff = sizeof(struct attr_indexroot);
1203 blnum = 0;
1204 cnum = 0;
1205 }
1206
1207 do {
1208 DPRINTF("ntfs_ntreaddir: scan: 0x%x, %u, %u, %u, %u\n",
1209 attrnum, blnum, cnum, num, aoff);
1210 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
1211 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
1212 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
1213 if (error)
1214 goto fail;
1215
1216 if (attrnum == NTFS_A_INDX) {
1217 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1218 rdbuf, rdsize);
1219 if (error)
1220 goto fail;
1221 }
1222 if (aoff == 0)
1223 aoff = (attrnum == NTFS_A_INDX) ?
1224 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
1225 sizeof(struct attr_indexroot);
1226
1227 iep = (struct attr_indexentry *) (rdbuf + aoff);
1228 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
1229 aoff += iep->reclen,
1230 iep = (struct attr_indexentry *) (rdbuf + aoff))
1231 {
1232 if (!ntfs_isnamepermitted(ntmp, iep)) continue;
1233
1234 if (cnum >= num) {
1235 fp->f_lastdnum = cnum;
1236 fp->f_lastdoff = aoff;
1237 fp->f_lastdblnum = blnum;
1238 fp->f_lastdattr = attrnum;
1239
1240 *riepp = iep;
1241
1242 error = 0;
1243 goto fail;
1244 }
1245 cnum++;
1246 }
1247
1248 if (iavap) {
1249 if (attrnum == NTFS_A_INDXROOT)
1250 blnum = 0;
1251 else
1252 blnum++;
1253
1254 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
1255 if (bmp[blnum >> 3] & (1 << (blnum & 7)))
1256 break;
1257 blnum++;
1258 }
1259
1260 attrnum = NTFS_A_INDX;
1261 aoff = 0;
1262 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
1263 break;
1264 DPRINTF("ntfs_ntreaddir: blnum: %u\n", blnum);
1265 }
1266 } while (iavap);
1267
1268 *riepp = NULL;
1269 fp->f_lastdnum = 0;
1270
1271 fail:
1272 if (vap)
1273 ntfs_ntvattrrele(vap);
1274 if (bmvap)
1275 ntfs_ntvattrrele(bmvap);
1276 if (iavap)
1277 ntfs_ntvattrrele(iavap);
1278 if (bmp)
1279 free(bmp, M_TEMP, 0);
1280 ntfs_ntput(ip);
1281
1282 return (error);
1283 }
1284
1285 /*
1286 * Convert NTFS times that are in 100 ns units and begins from
1287 * 1601 Jan 1 into unix times.
1288 */
1289 struct timespec
ntfs_nttimetounix(u_int64_t nt)1290 ntfs_nttimetounix(u_int64_t nt)
1291 {
1292 struct timespec t;
1293
1294 /* Windows NT times are in 100 ns and from 1601 Jan 1 */
1295 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
1296 t.tv_sec = nt / (1000 * 1000 * 10) -
1297 369LL * 365LL * 24LL * 60LL * 60LL -
1298 89LL * 1LL * 24LL * 60LL * 60LL;
1299 return (t);
1300 }
1301
1302 /*
1303 * Get file sizes from corresponding attribute.
1304 *
1305 * ntnode under fnode should be locked.
1306 */
1307 int
ntfs_filesize(struct ntfsmount * ntmp,struct fnode * fp,u_int64_t * size,u_int64_t * bytes)1308 ntfs_filesize(struct ntfsmount *ntmp, struct fnode *fp, u_int64_t *size,
1309 u_int64_t *bytes)
1310 {
1311 struct ntvattr *vap;
1312 struct ntnode *ip = FTONT(fp);
1313 u_int64_t sz, bn;
1314 int error;
1315
1316 DPRINTF("ntfs_filesize: ino: %u\n", ip->i_number);
1317
1318 error = ntfs_ntvattrget(ntmp, ip,
1319 fp->f_attrtype, fp->f_attrname, 0, &vap);
1320 if (error)
1321 return (error);
1322
1323 bn = vap->va_allocated;
1324 sz = vap->va_datalen;
1325
1326 DPRINTF("ntfs_filesize: %llu bytes (%llu bytes allocated)\n", sz, bn);
1327
1328 if (size)
1329 *size = sz;
1330 if (bytes)
1331 *bytes = bn;
1332
1333 ntfs_ntvattrrele(vap);
1334
1335 return (0);
1336 }
1337
1338 /*
1339 * This is one of the read routines.
1340 *
1341 * ntnode should be locked.
1342 */
1343 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)1344 ntfs_readntvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1345 struct ntvattr *vap, off_t roff, size_t rsize, void *rdata, size_t *initp,
1346 struct uio *uio)
1347 {
1348 int error = 0;
1349 off_t off;
1350
1351 *initp = 0;
1352 if (vap->va_flag & NTFS_AF_INRUN) {
1353 int cnt;
1354 cn_t ccn, ccl, cn, cl;
1355 caddr_t data = rdata;
1356 struct buf *bp;
1357 size_t left, tocopy;
1358
1359 DDPRINTF("ntfs_readntvattr_plain: data in run: %lu chains\n",
1360 vap->va_vruncnt);
1361
1362 off = roff;
1363 left = rsize;
1364 ccl = 0;
1365 ccn = 0;
1366 cnt = 0;
1367 while (left && (cnt < vap->va_vruncnt)) {
1368 ccn = vap->va_vruncn[cnt];
1369 ccl = vap->va_vruncl[cnt];
1370
1371 DDPRINTF("ntfs_readntvattr_plain: left %zu, "
1372 "cn: 0x%llx, cl: %llu, off: %lld\n",
1373 left, ccn, ccl, off);
1374
1375 if (ntfs_cntob(ccl) < off) {
1376 off -= ntfs_cntob(ccl);
1377 cnt++;
1378 continue;
1379 }
1380 if (ccn || ip->i_number == NTFS_BOOTINO) {
1381 ccl -= ntfs_btocn(off);
1382 cn = ccn + ntfs_btocn(off);
1383 off = ntfs_btocnoff(off);
1384
1385 while (left && ccl) {
1386 /*
1387 * Always read single clusters at a
1388 * time - we need to avoid reading
1389 * differently-sized blocks at the
1390 * same disk offsets to avoid
1391 * confusing the buffer cache.
1392 */
1393 tocopy = MIN(left,
1394 ntfs_cntob(1) - off);
1395 cl = ntfs_btocl(tocopy + off);
1396 KASSERT(cl == 1 &&
1397 tocopy <= ntfs_cntob(1));
1398
1399 DDPRINTF("ntfs_readntvattr_plain: "
1400 "read: cn: 0x%llx cl: %llu, "
1401 "off: %lld, len: %zu, "
1402 "left: %zu\n",
1403 cn, cl, off, tocopy, left);
1404 error = bread(ntmp->ntm_devvp,
1405 ntfs_cntobn(cn),
1406 ntfs_cntob(cl),
1407 &bp);
1408 if (error) {
1409 brelse(bp);
1410 return (error);
1411 }
1412 if (uio) {
1413 error = uiomove(bp->b_data + off,
1414 tocopy, uio);
1415 if (error != 0)
1416 break;
1417 } else {
1418 memcpy(data, bp->b_data + off,
1419 tocopy);
1420 }
1421 brelse(bp);
1422 data = data + tocopy;
1423 *initp += tocopy;
1424 off = 0;
1425 left -= tocopy;
1426 cn += cl;
1427 ccl -= cl;
1428 }
1429 } else {
1430 tocopy = MIN(left, ntfs_cntob(ccl) - off);
1431 DDPRINTF("ntfs_readntvattr_plain: hole: "
1432 "ccn: 0x%llx ccl: %llu, off: %lld, "
1433 "len: %zu, left: %zu\n",
1434 ccn, ccl, off, tocopy, left);
1435 left -= tocopy;
1436 off = 0;
1437 if (uio) {
1438 size_t remains = tocopy;
1439 for(; remains; remains--) {
1440 error = uiomove("", 1, uio);
1441 if (error != 0)
1442 break;
1443 }
1444 } else
1445 bzero(data, tocopy);
1446 data = data + tocopy;
1447 }
1448 cnt++;
1449 if (error != 0)
1450 break;
1451 }
1452 if (left && error == 0) {
1453 printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
1454 error = E2BIG;
1455 }
1456 } else {
1457 DDPRINTF("ntfs_readnvattr_plain: data is in mft record\n");
1458 if (uio)
1459 error = uiomove(vap->va_datap + roff, rsize, uio);
1460 else
1461 memcpy(rdata, vap->va_datap + roff, rsize);
1462 *initp += rsize;
1463 }
1464
1465 return (error);
1466 }
1467
1468 /*
1469 * This is one of read routines.
1470 */
1471 int
ntfs_readattr_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)1472 ntfs_readattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1473 u_int32_t attrnum, char *attrname, off_t roff, size_t rsize, void *rdata,
1474 size_t *initp, struct uio *uio)
1475 {
1476 size_t init;
1477 int error = 0;
1478 off_t off = roff;
1479 size_t left = rsize, toread;
1480 caddr_t data = rdata;
1481 struct ntvattr *vap;
1482 *initp = 0;
1483
1484 while (left) {
1485 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1486 ntfs_btocn(off), &vap);
1487 if (error)
1488 return (error);
1489 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1490 DDPRINTF("ntfs_readattr_plain: o: %lld, s: %zu "
1491 "(%llu - %llu)\n", off, toread,
1492 vap->va_vcnstart, vap->va_vcnend);
1493 error = ntfs_readntvattr_plain(ntmp, ip, vap,
1494 off - ntfs_cntob(vap->va_vcnstart),
1495 toread, data, &init, uio);
1496 if (error) {
1497 printf("ntfs_readattr_plain: ntfs_readntvattr_plain "
1498 "failed: o: %lld, s: %zu\n", off, toread);
1499 printf("ntfs_readattr_plain: attrib: %llu - %llu\n",
1500 vap->va_vcnstart, vap->va_vcnend);
1501 ntfs_ntvattrrele(vap);
1502 break;
1503 }
1504 ntfs_ntvattrrele(vap);
1505 left -= toread;
1506 off += toread;
1507 data = data + toread;
1508 *initp += init;
1509 }
1510
1511 return (error);
1512 }
1513
1514 /*
1515 * This is one of read routines.
1516 */
1517 int
ntfs_readattr(struct ntfsmount * ntmp,struct ntnode * ip,u_int32_t attrnum,char * attrname,off_t roff,size_t rsize,void * rdata,struct uio * uio)1518 ntfs_readattr(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t attrnum,
1519 char *attrname, off_t roff, size_t rsize, void *rdata, struct uio *uio)
1520 {
1521 int error = 0;
1522 struct ntvattr *vap;
1523 size_t init;
1524
1525 DDPRINTF("ntfs_readattr: reading %u: 0x%x, from %lld size %zu bytes\n",
1526 ip->i_number, attrnum, roff, rsize);
1527
1528 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
1529 if (error)
1530 return (error);
1531
1532 if ((roff > vap->va_datalen) ||
1533 (roff + rsize > vap->va_datalen)) {
1534 printf("ntfs_readattr: offset too big: %lld (%lld) > %llu\n",
1535 roff, roff + rsize, vap->va_datalen);
1536 ntfs_ntvattrrele(vap);
1537 return (E2BIG);
1538 }
1539 if (vap->va_compression && vap->va_compressalg) {
1540 u_int8_t *cup;
1541 u_int8_t *uup;
1542 off_t off = roff;
1543 caddr_t data = rdata;
1544 cn_t cn;
1545 size_t left = rsize, tocopy;
1546
1547 DDPRINTF("ntfs_ntreadattr: compression: %u\n",
1548 vap->va_compressalg);
1549
1550 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL), M_NTFSDECOMP,
1551 M_WAITOK);
1552 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL), M_NTFSDECOMP,
1553 M_WAITOK);
1554
1555 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
1556 off = roff - ntfs_cntob(cn);
1557
1558 while (left) {
1559 error = ntfs_readattr_plain(ntmp, ip, attrnum,
1560 attrname, ntfs_cntob(cn),
1561 ntfs_cntob(NTFS_COMPUNIT_CL),
1562 cup, &init, NULL);
1563 if (error)
1564 break;
1565
1566 tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
1567
1568 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
1569 if (uio)
1570 error = uiomove(cup + off, tocopy, uio);
1571 else
1572 memcpy(data, cup + off, tocopy);
1573 } else if (init == 0) {
1574 if (uio) {
1575 size_t remains = tocopy;
1576 for(; remains; remains--) {
1577 error = uiomove("", 1, uio);
1578 if (error != 0)
1579 break;
1580 }
1581 }
1582 else
1583 bzero(data, tocopy);
1584 } else {
1585 error = ntfs_uncompunit(ntmp, uup, cup);
1586 if (error)
1587 break;
1588 if (uio)
1589 error = uiomove(uup + off, tocopy, uio);
1590 else
1591 memcpy(data, uup + off, tocopy);
1592 }
1593 if (error)
1594 break;
1595
1596 left -= tocopy;
1597 data = data + tocopy;
1598 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
1599 cn += NTFS_COMPUNIT_CL;
1600 }
1601
1602 free(uup, M_NTFSDECOMP, 0);
1603 free(cup, M_NTFSDECOMP, 0);
1604 } else
1605 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
1606 roff, rsize, rdata, &init, uio);
1607 ntfs_ntvattrrele(vap);
1608 return (error);
1609 }
1610
1611 #if UNUSED_CODE
1612 int
ntfs_parserun(cn_t * cn,cn_t * cl,u_int8_t * run,u_long len,u_long * off)1613 ntfs_parserun(cn_t *cn, cn_t *cl, u_int8_t *run, u_long len, u_long *off)
1614 {
1615 u_int8_t sz;
1616 int i;
1617
1618 if (NULL == run) {
1619 printf("ntfs_parsetun: run == NULL\n");
1620 return (EINVAL);
1621 }
1622 sz = run[(*off)++];
1623 if (0 == sz) {
1624 printf("ntfs_parserun: trying to go out of run\n");
1625 return (E2BIG);
1626 }
1627 *cl = 0;
1628 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1629 printf("ntfs_parserun: " \
1630 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1631 sz, len, *off);
1632 return (EINVAL);
1633 }
1634 for (i = 0; i < (sz & 0xF); i++)
1635 *cl += (u_int32_t) run[(*off)++] << (i << 3);
1636
1637 sz >>= 4;
1638 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1639 printf("ntfs_parserun: " \
1640 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1641 sz, len, *off);
1642 return (EINVAL);
1643 }
1644 for (i = 0; i < (sz & 0xF); i++)
1645 *cn += (u_int32_t) run[(*off)++] << (i << 3);
1646
1647 return (0);
1648 }
1649 #endif
1650
1651 /*
1652 * Process fixup routine on given buffer.
1653 */
1654 int
ntfs_procfixups(struct ntfsmount * ntmp,u_int32_t magic,caddr_t buf,size_t len)1655 ntfs_procfixups(struct ntfsmount *ntmp, u_int32_t magic, caddr_t buf,
1656 size_t len)
1657 {
1658 struct fixuphdr *fhp = (struct fixuphdr *) buf;
1659 int i;
1660 u_int16_t fixup;
1661 u_int16_t *fxp;
1662 u_int16_t *cfxp;
1663
1664 if (fhp->fh_magic != magic) {
1665 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
1666 fhp->fh_magic, magic);
1667 return (EINVAL);
1668 }
1669 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
1670 printf("ntfs_procfixups: " \
1671 "bad fixups number: %d for %ld bytes block\n",
1672 fhp->fh_fnum, (long)len); /* XXX printf kludge */
1673 return (EINVAL);
1674 }
1675 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
1676 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
1677 return (EINVAL);
1678 }
1679 fxp = (u_int16_t *) (buf + fhp->fh_foff);
1680 cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
1681 fixup = *fxp++;
1682 for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
1683 if (*cfxp != fixup) {
1684 printf("ntfs_procfixups: fixup %d doesn't match\n", i);
1685 return (EINVAL);
1686 }
1687 *cfxp = *fxp;
1688 cfxp = (u_int16_t *)((caddr_t)cfxp + ntmp->ntm_bps);
1689 }
1690 return (0);
1691 }
1692
1693 #if UNUSED_CODE
1694 int
ntfs_runtocn(cn_t * cn,struct ntfsmount * ntmp,u_int8_t * run,u_long len,cn_t vcn)1695 ntfs_runtocn(cn_t *cn, struct ntfsmount *ntmp, u_int8_t *run, u_long len,
1696 cn_t vcn)
1697 {
1698 cn_t ccn = 0;
1699 cn_t ccl = 0;
1700 u_long off = 0;
1701 int error = 0;
1702
1703 #if NTFS_DEBUG
1704 int i;
1705 printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n",
1706 run, len, (u_long) vcn);
1707 printf("ntfs_runtocn: run: ");
1708 for (i = 0; i < len; i++)
1709 printf("0x%02x ", run[i]);
1710 printf("\n");
1711 #endif
1712
1713 if (NULL == run) {
1714 printf("ntfs_runtocn: run == NULL\n");
1715 return (EINVAL);
1716 }
1717 do {
1718 if (run[off] == 0) {
1719 printf("ntfs_runtocn: vcn too big\n");
1720 return (E2BIG);
1721 }
1722 vcn -= ccl;
1723 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
1724 if (error) {
1725 printf("ntfs_runtocn: ntfs_parserun failed\n");
1726 return (error);
1727 }
1728 } while (ccl <= vcn);
1729 *cn = ccn + vcn;
1730 return (0);
1731 }
1732 #endif
1733
1734 /*
1735 * if the ntfs_toupper_tab[] is filled already, just raise use count;
1736 * otherwise read the data from the filesystem we are currently mounting
1737 */
1738 int
ntfs_toupper_use(struct mount * mp,struct ntfsmount * ntmp,struct proc * p)1739 ntfs_toupper_use(struct mount *mp, struct ntfsmount *ntmp, struct proc *p)
1740 {
1741 int error = 0;
1742 struct vnode *vp;
1743
1744 /* get exclusive access */
1745 rw_enter_write(&ntfs_toupper_lock);
1746
1747 /* only read the translation data from a file if it hasn't been
1748 * read already */
1749 if (ntfs_toupper_tab)
1750 goto out;
1751
1752 /*
1753 * Read in Unicode lowercase -> uppercase translation file.
1754 * XXX for now, just the first 256 entries are used anyway,
1755 * so don't bother reading more
1756 */
1757 ntfs_toupper_tab = malloc(256 * 256 * sizeof(wchar), M_NTFSRDATA,
1758 M_WAITOK);
1759
1760 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp)))
1761 goto out;
1762 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
1763 0, 256*256*sizeof(wchar), (char *) ntfs_toupper_tab,
1764 NULL);
1765 vput(vp);
1766
1767 out:
1768 ntfs_toupper_usecount++;
1769 rw_exit_write(&ntfs_toupper_lock);
1770 return (error);
1771 }
1772
1773 /*
1774 * lower the use count and if it reaches zero, free the memory
1775 * tied by toupper table
1776 */
1777 void
ntfs_toupper_unuse(struct proc * p)1778 ntfs_toupper_unuse(struct proc *p)
1779 {
1780 /* get exclusive access */
1781 rw_enter_write(&ntfs_toupper_lock);
1782
1783 ntfs_toupper_usecount--;
1784 if (ntfs_toupper_usecount == 0) {
1785 free(ntfs_toupper_tab, M_NTFSRDATA, 0);
1786 ntfs_toupper_tab = NULL;
1787 }
1788 #ifdef DIAGNOSTIC
1789 else if (ntfs_toupper_usecount < 0) {
1790 panic("ntfs_toupper_unuse(): use count negative: %d",
1791 ntfs_toupper_usecount);
1792 }
1793 #endif
1794
1795 /* release the lock */
1796 rw_exit_write(&ntfs_toupper_lock);
1797 }
1798