1 /* $NetBSD: ntfs_subr.c,v 1.23 1999/10/31 19:45:26 jdolecek Exp $ */
2
3 /*-
4 * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: src/sys/ntfs/ntfs_subr.c,v 1.7.2.4 2001/10/12 22:08:49 semenu Exp $
29 */
30
31 #include <sys/param.h>
32 #include <sys/types.h>
33 #include <sys/systm.h>
34 #include <sys/uio.h>
35 #include <sys/proc.h>
36 #include <sys/namei.h>
37 #include <sys/kernel.h>
38 #include <sys/vnode.h>
39 #include <sys/mount.h>
40 #include <sys/buf.h>
41 #include <sys/file.h>
42 #include <sys/malloc.h>
43 #include <sys/lock.h>
44 #include <sys/spinlock.h>
45 #include <sys/iconv.h>
46
47 #include <machine/inttypes.h>
48
49 #include <sys/buf2.h>
50 #include <sys/spinlock2.h>
51
52 #include "ntfs.h"
53 #include "ntfsmount.h"
54 #include "ntfs_inode.h"
55 #include "ntfs_vfsops.h"
56 #include "ntfs_subr.h"
57 #include "ntfs_compr.h"
58 #include "ntfs_ihash.h"
59
60 MALLOC_DEFINE(M_NTFSNTVATTR, "NTFS vattr", "NTFS file attribute information");
61 MALLOC_DEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
62 MALLOC_DEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
63 MALLOC_DEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
64
65 static int ntfs_ntlookupattr (struct ntfsmount *, const char *, int, int *, char **);
66 static int ntfs_findvattr (struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t);
67 static int ntfs_uastricmp (struct ntfsmount *, const wchar *, size_t, const char *, size_t);
68 static 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_TOUPPER(ch) (ntfs_toupper_tab[(ch)])
74 static struct lock ntfs_toupper_lock;
75 static signed int ntfs_toupper_usecount;
76 extern struct iconv_functions *ntfs_iconv;
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(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: %"PRId64", 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 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)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: %"PRId64"\n",
110 ip->i_number));
111 error = ntfs_loadntnode(ntmp,ip);
112 if (error) {
113 kprintf("ntfs_findvattr: FAILED TO LOAD INO: %"PRId64"\n",
114 ip->i_number);
115 return (error);
116 }
117 }
118
119 *lvapp = NULL;
120 *vapp = NULL;
121 for (vap = ip->i_valist.lh_first; vap; vap = vap->va_list.le_next) {
122 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %d - %d\n", \
123 vap->va_type, (u_int32_t) vap->va_vcnstart, \
124 (u_int32_t) vap->va_vcnend));
125 if ((vap->va_type == type) &&
126 (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
127 (vap->va_namelen == namelen) &&
128 (strncmp(name, vap->va_name, namelen) == 0)) {
129 *vapp = vap;
130 ntfs_ntref(vap->va_ip);
131 return (0);
132 }
133 if (vap->va_type == NTFS_A_ATTRLIST)
134 *lvapp = vap;
135 }
136
137 return (-1);
138 }
139
140 /*
141 * Search attribute specifed in ntnode (load ntnode if nessecary).
142 * If not found but ATTR_A_ATTRLIST present, read it in and search throught.
143 * VOP_VGET node needed, and lookup througth it's ntnode (load if nessesary).
144 *
145 * ntnode should be locked
146 */
147 int
ntfs_ntvattrget(struct ntfsmount * ntmp,struct ntnode * ip,u_int32_t type,const char * name,cn_t vcn,struct ntvattr ** vapp)148 ntfs_ntvattrget(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t type,
149 const char *name, cn_t vcn, struct ntvattr **vapp)
150 {
151 struct ntvattr *lvap = NULL;
152 struct attr_attrlist *aalp;
153 struct attr_attrlist *nextaalp;
154 struct vnode *newvp;
155 struct ntnode *newip;
156 caddr_t alpool;
157 size_t namelen, len;
158 int error;
159
160 *vapp = NULL;
161
162 if (name) {
163 dprintf(("ntfs_ntvattrget: " \
164 "ino: %"PRId64", type: 0x%x, name: %s, vcn: %d\n", \
165 ip->i_number, type, name, (u_int32_t) vcn));
166 namelen = strlen(name);
167 } else {
168 dprintf(("ntfs_ntvattrget: " \
169 "ino: %"PRId64", type: 0x%x, vcn: %d\n", \
170 ip->i_number, type, (u_int32_t) vcn));
171 name = "";
172 namelen = 0;
173 }
174
175 error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
176 if (error >= 0)
177 return (error);
178
179 if (!lvap) {
180 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
181 "ino: %"PRId64", type: 0x%x, name: %s, vcn: %d\n", \
182 ip->i_number, type, name, (u_int32_t) vcn));
183 return (ENOENT);
184 }
185 /* Scan $ATTRIBUTE_LIST for requested attribute */
186 len = lvap->va_datalen;
187 alpool = kmalloc(len, M_TEMP, M_WAITOK);
188 error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
189 NULL);
190 if (error)
191 goto out;
192
193 aalp = (struct attr_attrlist *) alpool;
194 nextaalp = NULL;
195
196 for(; len > 0; aalp = nextaalp) {
197 dprintf(("ntfs_ntvattrget: " \
198 "attrlist: ino: %d, attr: 0x%x, vcn: %d\n", \
199 aalp->al_inumber, aalp->al_type, \
200 (u_int32_t) 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: %d\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, curthread, &newvp);
222 if (error) {
223 kprintf("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 kprintf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
235 break;
236 }
237 error = ENOENT;
238
239 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
240 "ino: %"PRId64", type: 0x%x, name: %.*s, vcn: %d\n", \
241 ip->i_number, type, (int) namelen, name, (u_int32_t) vcn));
242 out:
243 kfree(alpool, M_TEMP);
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 filerec *mfrp;
256 daddr_t bn;
257 int error,off;
258 struct attr *ap;
259 struct ntvattr *nvap;
260
261 dprintf(("ntfs_loadntnode: loading ino: %"PRId64"\n",ip->i_number));
262
263 mfrp = kmalloc(ntfs_bntob(ntmp->ntm_bpmftrec), M_TEMP, M_WAITOK);
264
265 if (ip->i_number < NTFS_SYSNODESNUM) {
266 struct buf *bp;
267
268 dprintf(("ntfs_loadntnode: read system node\n"));
269
270 bn = ntfs_cntobn(ntmp->ntm_mftcn) +
271 ntmp->ntm_bpmftrec * ip->i_number;
272
273 error = bread(ntmp->ntm_devvp,
274 ntfs_bntodoff(bn), ntfs_bntob(ntmp->ntm_bpmftrec), &bp);
275 if (error) {
276 kprintf("ntfs_loadntnode: BREAD FAILED\n");
277 brelse(bp);
278 goto out;
279 }
280 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
281 bqrelse(bp);
282 } else {
283 struct vnode *vp;
284
285 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
286 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
287 ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
288 ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
289 if (error) {
290 kprintf("ntfs_loadntnode: ntfs_readattr failed\n");
291 goto out;
292 }
293 }
294
295 /* Check if magic and fixups are correct */
296 error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp,
297 ntfs_bntob(ntmp->ntm_bpmftrec));
298 if (error) {
299 kprintf("ntfs_loadntnode: BAD MFT RECORD %"PRId64"\n",
300 ip->i_number);
301 goto out;
302 }
303
304 dprintf(("ntfs_loadntnode: load attrs for ino: %"PRId64"\n",ip->i_number));
305 off = mfrp->fr_attroff;
306 ap = (struct attr *) ((caddr_t)mfrp + off);
307
308 LIST_INIT(&ip->i_valist);
309
310 while (ap->a_hdr.a_type != -1) {
311 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
312 if (error)
313 break;
314 nvap->va_ip = ip;
315
316 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
317
318 off += ap->a_hdr.reclen;
319 ap = (struct attr *) ((caddr_t)mfrp + off);
320 }
321 if (error) {
322 kprintf("ntfs_loadntnode: failed to load attr ino: %"PRId64"\n",
323 ip->i_number);
324 goto out;
325 }
326
327 ip->i_mainrec = mfrp->fr_mainrec;
328 ip->i_nlink = mfrp->fr_nlink;
329 ip->i_frflag = mfrp->fr_flags;
330
331 ip->i_flag |= IN_LOADED;
332
333 out:
334 kfree(mfrp, M_TEMP);
335 return (error);
336 }
337
338 /*
339 * Routine locks ntnode and increase usecount, just opposite of
340 * ntfs_ntput().
341 */
342 int
ntfs_ntget(struct ntnode * ip)343 ntfs_ntget(struct ntnode *ip)
344 {
345 dprintf(("ntfs_ntget: get ntnode %"PRId64": %p, usecount: %d\n",
346 ip->i_number, ip, ip->i_usecount));
347
348 ip->i_usecount++; /* ZZZ */
349 LOCKMGR(&ip->i_lock, LK_EXCLUSIVE);
350
351 return 0;
352 }
353
354 /*
355 * Routine search ntnode in hash, if found: lock, inc usecount and return.
356 * If not in hash allocate structure for ntnode, prefill it, lock,
357 * inc count and return.
358 *
359 * ntnode returned locked
360 */
361 int
ntfs_ntlookup(struct ntfsmount * ntmp,ino_t ino,struct ntnode ** ipp)362 ntfs_ntlookup(struct ntfsmount *ntmp, ino_t ino, struct ntnode **ipp)
363 {
364 struct ntnode *ip;
365
366 dprintf(("ntfs_ntlookup: looking for ntnode %ju\n", (uintmax_t)ino));
367
368 do {
369 if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
370 ntfs_ntget(ip);
371 dprintf(("ntfs_ntlookup: ntnode %ju: %p, usecount: %d\n",
372 (uintmax_t)ino, ip, ip->i_usecount));
373 *ipp = ip;
374 return (0);
375 }
376 } while (LOCKMGR(&ntfs_hashlock, LK_EXCLUSIVE | LK_SLEEPFAIL));
377
378 ip = kmalloc(sizeof(struct ntnode), M_NTFSNTNODE, M_WAITOK | M_ZERO);
379 ddprintf(("ntfs_ntlookup: allocating ntnode: %ju: %p\n", ino, ip));
380
381 /* Generic initialization */
382 ip->i_devvp = ntmp->ntm_devvp;
383 ip->i_dev = ntmp->ntm_dev;
384 ip->i_number = ino;
385 ip->i_mp = ntmp;
386
387 LIST_INIT(&ip->i_fnlist);
388 vref(ip->i_devvp);
389
390 /* init lock and lock the newborn ntnode */
391 lockinit(&ip->i_lock, "ntnode", 0, 0);
392 spin_init(&ip->i_interlock, "ntfsntlookup");
393 ntfs_ntget(ip);
394
395 ntfs_nthashins(ip);
396
397 LOCKMGR(&ntfs_hashlock, LK_RELEASE);
398
399 *ipp = ip;
400
401 dprintf(("ntfs_ntlookup: ntnode %ju: %p, usecount: %d\n",
402 (uintmax_t)ino, ip, ip->i_usecount));
403
404 return (0);
405 }
406
407 /*
408 * Decrement usecount of ntnode and unlock it, if usecount reach zero,
409 * deallocate ntnode.
410 *
411 * ntnode should be locked on entry, and unlocked on return.
412 */
413 void
ntfs_ntput(struct ntnode * ip)414 ntfs_ntput(struct ntnode *ip)
415 {
416 struct ntvattr *vap;
417
418 dprintf(("ntfs_ntput: rele ntnode %"PRId64": %p, usecount: %d\n",
419 ip->i_number, ip, ip->i_usecount));
420
421 spin_lock(&ip->i_interlock);
422 ip->i_usecount--;
423
424 #ifdef DIAGNOSTIC
425 if (ip->i_usecount < 0) {
426 spin_unlock(&ip->i_interlock);
427 panic("ntfs_ntput: ino: %"PRId64" usecount: %d ",
428 ip->i_number,ip->i_usecount);
429 }
430 #endif
431
432 if (ip->i_usecount > 0) {
433 spin_unlock(&ip->i_interlock);
434 LOCKMGR(&ip->i_lock, LK_RELEASE);
435 return;
436 }
437
438 dprintf(("ntfs_ntput: deallocating ntnode: %"PRId64"\n", ip->i_number));
439
440 if (ip->i_fnlist.lh_first) {
441 spin_unlock(&ip->i_interlock);
442 panic("ntfs_ntput: ntnode has fnodes");
443 }
444
445 /*
446 * XXX this is a bit iffy because we are making high level calls
447 * while holding a spinlock.
448 */
449 ntfs_nthashrem(ip);
450
451 while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) {
452 LIST_REMOVE(vap,va_list);
453 ntfs_freentvattr(vap);
454 }
455 spin_unlock(&ip->i_interlock);
456 vrele(ip->i_devvp);
457 kfree(ip, M_NTFSNTNODE);
458 }
459
460 /*
461 * increment usecount of ntnode
462 */
463 void
ntfs_ntref(struct ntnode * ip)464 ntfs_ntref(struct ntnode *ip)
465 {
466 ip->i_usecount++;
467
468 dprintf(("ntfs_ntref: ino %"PRId64", usecount: %d\n",
469 ip->i_number, ip->i_usecount));
470 }
471
472 /*
473 * Decrement usecount of ntnode.
474 */
475 void
ntfs_ntrele(struct ntnode * ip)476 ntfs_ntrele(struct ntnode *ip)
477 {
478 dprintf(("ntfs_ntrele: rele ntnode %"PRId64": %p, usecount: %d\n",
479 ip->i_number, ip, ip->i_usecount));
480
481 spin_lock(&ip->i_interlock);
482 ip->i_usecount--;
483
484 if (ip->i_usecount < 0) {
485 spin_unlock(&ip->i_interlock);
486 panic("ntfs_ntrele: ino: %"PRId64" usecount: %d ",
487 ip->i_number,ip->i_usecount);
488 }
489 spin_unlock(&ip->i_interlock);
490 }
491
492 /*
493 * Deallocate all memory allocated for ntvattr
494 */
495 void
ntfs_freentvattr(struct ntvattr * vap)496 ntfs_freentvattr(struct ntvattr *vap)
497 {
498 if (vap->va_flag & NTFS_AF_INRUN) {
499 if (vap->va_vruncn)
500 kfree(vap->va_vruncn, M_NTFSRUN);
501 if (vap->va_vruncl)
502 kfree(vap->va_vruncl, M_NTFSRUN);
503 } else {
504 if (vap->va_datap)
505 kfree(vap->va_datap, M_NTFSRDATA);
506 }
507 kfree(vap, M_NTFSNTVATTR);
508 }
509
510 /*
511 * Convert disk image of attribute into ntvattr structure,
512 * runs are expanded also.
513 */
514 int
ntfs_attrtontvattr(struct ntfsmount * ntmp,struct ntvattr ** rvapp,struct attr * rap)515 ntfs_attrtontvattr(struct ntfsmount *ntmp, struct ntvattr **rvapp,
516 struct attr *rap)
517 {
518 int error, i;
519 struct ntvattr *vap;
520
521 error = 0;
522 *rvapp = NULL;
523
524 vap = kmalloc(sizeof(struct ntvattr), M_NTFSNTVATTR,
525 M_WAITOK | M_ZERO);
526 vap->va_ip = NULL;
527 vap->va_flag = rap->a_hdr.a_flag;
528 vap->va_type = rap->a_hdr.a_type;
529 vap->va_compression = rap->a_hdr.a_compression;
530 vap->va_index = rap->a_hdr.a_index;
531
532 ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
533
534 vap->va_namelen = rap->a_hdr.a_namelen;
535 if (rap->a_hdr.a_namelen) {
536 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
537 ddprintf((", name:["));
538 for (i = 0; i < vap->va_namelen; i++) {
539 vap->va_name[i] = unp[i];
540 ddprintf(("%c", vap->va_name[i]));
541 }
542 ddprintf(("]"));
543 }
544 if (vap->va_flag & NTFS_AF_INRUN) {
545 ddprintf((", nonres."));
546 vap->va_datalen = rap->a_nr.a_datalen;
547 vap->va_allocated = rap->a_nr.a_allocated;
548 vap->va_vcnstart = rap->a_nr.a_vcnstart;
549 vap->va_vcnend = rap->a_nr.a_vcnend;
550 vap->va_compressalg = rap->a_nr.a_compressalg;
551 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
552 &(vap->va_vruncnt),
553 (caddr_t) rap + rap->a_nr.a_dataoff);
554 } else {
555 vap->va_compressalg = 0;
556 ddprintf((", res."));
557 vap->va_datalen = rap->a_r.a_datalen;
558 vap->va_allocated = rap->a_r.a_datalen;
559 vap->va_vcnstart = 0;
560 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
561 vap->va_datap = kmalloc(vap->va_datalen, M_NTFSRDATA,
562 M_WAITOK);
563 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
564 rap->a_r.a_datalen);
565 }
566 ddprintf((", len: %d", vap->va_datalen));
567
568 if (error)
569 kfree(vap, M_NTFSNTVATTR);
570 else
571 *rvapp = vap;
572
573 ddprintf(("\n"));
574
575 return (error);
576 }
577
578 /*
579 * Expand run into more utilizable and more memory eating format.
580 */
581 int
ntfs_runtovrun(cn_t ** rcnp,cn_t ** rclp,u_long * rcntp,u_int8_t * run)582 ntfs_runtovrun(cn_t **rcnp, cn_t **rclp, u_long *rcntp, u_int8_t *run)
583 {
584 u_int32_t off;
585 u_int32_t sz, i;
586 cn_t *cn;
587 cn_t *cl;
588 u_long cnt;
589 cn_t prev;
590 cn_t tmp;
591
592 off = 0;
593 cnt = 0;
594 i = 0;
595 while (run[off]) {
596 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
597 cnt++;
598 }
599 cn = kmalloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
600 cl = kmalloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
601
602 off = 0;
603 cnt = 0;
604 prev = 0;
605 while (run[off]) {
606
607 sz = run[off++];
608 cl[cnt] = 0;
609
610 for (i = 0; i < (sz & 0xF); i++)
611 cl[cnt] += (u_int32_t) run[off++] << (i << 3);
612
613 sz >>= 4;
614 if (run[off + sz - 1] & 0x80) {
615 tmp = ((u_int64_t) - 1) << (sz << 3);
616 for (i = 0; i < sz; i++)
617 tmp |= (u_int64_t) run[off++] << (i << 3);
618 } else {
619 tmp = 0;
620 for (i = 0; i < sz; i++)
621 tmp |= (u_int64_t) run[off++] << (i << 3);
622 }
623 if (tmp)
624 prev = cn[cnt] = prev + tmp;
625 else
626 cn[cnt] = tmp;
627
628 cnt++;
629 }
630 *rcnp = cn;
631 *rclp = cl;
632 *rcntp = cnt;
633 return (0);
634 }
635
636 /*
637 * Compare unicode and ascii string case insens.
638 */
639 static int
ntfs_uastricmp(struct ntfsmount * ntmp,const wchar * ustr,size_t ustrlen,const char * astr,size_t astrlen)640 ntfs_uastricmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
641 const char *astr, size_t astrlen)
642 {
643 int len;
644 size_t i, j, mbstrlen = astrlen;
645 int res;
646 wchar wc;
647
648 len = 0; /* avoid gcc warnings */
649 if (ntmp->ntm_ic_l2u) {
650 for (i = 0, j = 0; i < ustrlen && j < astrlen; i++, j++) {
651 if (j < astrlen -1) {
652 wc = (wchar)astr[j]<<8 | (astr[j+1]&0xFF);
653 len = 2;
654 } else {
655 wc = (wchar)astr[j]<<8 & 0xFF00;
656 len = 1;
657 }
658 res = ((int) NTFS_TOUPPER(ustr[i])) -
659 ((int)NTFS_TOUPPER(NTFS_82U(wc, &len)));
660 j += len - 1;
661 mbstrlen -= len - 1;
662
663 if (res)
664 return res;
665 }
666 } else {
667 /*
668 * We use NTFS_82U(NTFS_U28(c)) to get rid of unicode
669 * symbols not covered by translation table
670 */
671 for (i = 0; i < ustrlen && i < astrlen; i++) {
672 res = ((int) NTFS_TOUPPER(NTFS_82U(NTFS_U28(ustr[i]), &len))) -
673 ((int)NTFS_TOUPPER(NTFS_82U((wchar)astr[i], &len)));
674 if (res)
675 return res;
676 }
677 }
678 return (ustrlen - mbstrlen);
679 }
680
681 /*
682 * Compare unicode and ascii string case sens.
683 */
684 static int
ntfs_uastrcmp(struct ntfsmount * ntmp,const wchar * ustr,size_t ustrlen,const char * astr,size_t astrlen)685 ntfs_uastrcmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
686 const char *astr, size_t astrlen)
687 {
688 char u, l;
689 size_t i, j, mbstrlen = astrlen;
690 int res;
691 wchar wc;
692
693 for (i = 0, j = 0; (i < ustrlen) && (j < astrlen); i++, j++) {
694 res = 0;
695 wc = NTFS_U28(ustr[i]);
696 u = (char)(wc>>8);
697 l = (char)wc;
698 if (u != '\0' && j < astrlen -1) {
699 res = (int) (u - astr[j++]);
700 mbstrlen--;
701 }
702 res = (res<<8) + (int) (l - astr[j]);
703 if (res)
704 return res;
705 }
706 return (ustrlen - mbstrlen);
707 }
708
709 /*
710 * Search fnode in ntnode, if not found allocate and preinitialize.
711 *
712 * ntnode should be locked on entry.
713 */
714 int
ntfs_fget(struct ntfsmount * ntmp,struct ntnode * ip,int attrtype,char * attrname,struct fnode ** fpp)715 ntfs_fget(struct ntfsmount *ntmp, struct ntnode *ip, int attrtype,
716 char *attrname, struct fnode **fpp)
717 {
718 struct fnode *fp;
719
720 dprintf(("ntfs_fget: ino: %"PRId64", attrtype: 0x%x, attrname: %s\n",
721 ip->i_number,attrtype, attrname?attrname:""));
722 *fpp = NULL;
723 for (fp = ip->i_fnlist.lh_first; fp != NULL; fp = fp->f_fnlist.le_next){
724 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
725 fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
726
727 if ((attrtype == fp->f_attrtype) &&
728 ((!attrname && !fp->f_attrname) ||
729 (attrname && fp->f_attrname &&
730 !strcmp(attrname,fp->f_attrname)))){
731 dprintf(("ntfs_fget: found existed: %p\n",fp));
732 *fpp = fp;
733 }
734 }
735
736 if (*fpp)
737 return (0);
738
739 fp = kmalloc(sizeof(struct fnode), M_NTFSFNODE, M_WAITOK | M_ZERO);
740 dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
741
742 fp->f_ip = ip;
743 if (attrname) {
744 fp->f_flag |= FN_AATTRNAME;
745 fp->f_attrname = kmalloc(strlen(attrname) + 1, M_TEMP,
746 M_WAITOK);
747 strcpy(fp->f_attrname, attrname);
748 } else
749 fp->f_attrname = NULL;
750 fp->f_attrtype = attrtype;
751
752 ntfs_ntref(ip);
753
754 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
755
756 *fpp = fp;
757
758 return (0);
759 }
760
761 /*
762 * Deallocate fnode, remove it from ntnode's fnode list.
763 *
764 * ntnode should be locked.
765 */
766 void
ntfs_frele(struct fnode * fp)767 ntfs_frele(struct fnode *fp)
768 {
769 struct ntnode *ip = FTONT(fp);
770
771 dprintf(("ntfs_frele: fnode: %p for %"PRId64": %p\n", fp, ip->i_number, ip));
772
773 dprintf(("ntfs_frele: deallocating fnode\n"));
774 LIST_REMOVE(fp,f_fnlist);
775 if (fp->f_flag & FN_AATTRNAME)
776 kfree(fp->f_attrname, M_TEMP);
777 if (fp->f_dirblbuf)
778 kfree(fp->f_dirblbuf, M_NTFSDIR);
779 kfree(fp, M_NTFSFNODE);
780 ntfs_ntrele(ip);
781 }
782
783 /*
784 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME],
785 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
786 * If $ATTR_TYPE nott specifed, ATTR_A_DATA assumed.
787 */
788 static int
ntfs_ntlookupattr(struct ntfsmount * ntmp,const char * name,int namelen,int * attrtype,char ** attrname)789 ntfs_ntlookupattr(struct ntfsmount *ntmp, const char *name, int namelen,
790 int *attrtype, char **attrname)
791 {
792 const char *sys;
793 size_t syslen, i;
794 struct ntvattrdef *adp;
795
796 if (namelen == 0)
797 return (0);
798
799 if (name[0] == '$') {
800 sys = name;
801 for (syslen = 0; syslen < namelen; syslen++) {
802 if(sys[syslen] == ':') {
803 name++;
804 namelen--;
805 break;
806 }
807 }
808 name += syslen;
809 namelen -= syslen;
810
811 adp = ntmp->ntm_ad;
812 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
813 if (syslen != adp->ad_namelen ||
814 strncmp(sys, adp->ad_name, syslen) != 0)
815 continue;
816
817 *attrtype = adp->ad_type;
818 goto out;
819 }
820 return (ENOENT);
821 } else
822 *attrtype = NTFS_A_DATA;
823
824 out:
825 if (namelen) {
826 (*attrname) = kmalloc(namelen, M_TEMP, M_WAITOK);
827 memcpy((*attrname), name, namelen);
828 (*attrname)[namelen] = '\0';
829 }
830
831 return (0);
832 }
833
834 /*
835 * Lookup specifed node for filename, matching cnp,
836 * return fnode filled.
837 */
838 int
ntfs_ntlookupfile(struct ntfsmount * ntmp,struct vnode * vp,struct componentname * cnp,struct vnode ** vpp)839 ntfs_ntlookupfile(struct ntfsmount *ntmp, struct vnode *vp,
840 struct componentname *cnp, struct vnode **vpp)
841 {
842 struct fnode *fp = VTOF(vp);
843 struct ntnode *ip = FTONT(fp);
844 struct ntvattr *vap; /* Root attribute */
845 cn_t cn; /* VCN in current attribute */
846 caddr_t rdbuf; /* Buffer to read directory's blocks */
847 u_int32_t blsize;
848 u_int32_t rdsize; /* Length of data to read from current block */
849 struct attr_indexentry *iep;
850 int error, res, anamelen, fnamelen;
851 const char *fname,*aname;
852 u_int32_t aoff;
853 int attrtype = NTFS_A_DATA;
854 char *attrname = NULL;
855 struct fnode *nfp;
856 struct vnode *nvp;
857 enum vtype f_type;
858
859 error = ntfs_ntget(ip);
860 if (error)
861 return (error);
862
863 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
864 if (error || (vap->va_flag & NTFS_AF_INRUN))
865 return (ENOTDIR);
866
867 blsize = vap->va_a_iroot->ir_size;
868 rdsize = vap->va_datalen;
869
870 /*
871 * Divide file name into: foofilefoofilefoofile[:attrspec]
872 * Store like this: fname:fnamelen [aname:anamelen]
873 */
874 fname = cnp->cn_nameptr;
875 aname = NULL;
876 anamelen = 0;
877 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
878 if(fname[fnamelen] == ':') {
879 aname = fname + fnamelen + 1;
880 anamelen = cnp->cn_namelen - fnamelen - 1;
881 dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
882 fname, fnamelen, aname, anamelen));
883 break;
884 }
885
886 dprintf(("ntfs_ntlookupfile: blksz: %d, rdsz: %d\n", blsize, rdsize));
887
888 rdbuf = kmalloc(blsize, M_TEMP, M_WAITOK);
889
890 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
891 0, rdsize, rdbuf, NULL);
892 if (error)
893 goto fail;
894
895 aoff = sizeof(struct attr_indexroot);
896
897 do {
898 iep = (struct attr_indexentry *) (rdbuf + aoff);
899
900 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
901 aoff += iep->reclen,
902 iep = (struct attr_indexentry *) (rdbuf + aoff))
903 {
904 ddprintf(("scan: %d, %d\n",
905 (u_int32_t) iep->ie_number,
906 (u_int32_t) iep->ie_fnametype));
907
908 /* check the name - the case-insensitible check
909 * has to come first, to break from this for loop
910 * if needed, so we can dive correctly */
911 res = NTFS_UASTRICMP(iep->ie_fname, iep->ie_fnamelen,
912 fname, fnamelen);
913 if (res > 0) break;
914 if (res < 0) continue;
915
916 if (iep->ie_fnametype == 0 ||
917 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
918 {
919 res = NTFS_UASTRCMP(iep->ie_fname,
920 iep->ie_fnamelen, fname, fnamelen);
921 if (res != 0) continue;
922 }
923
924 if (aname) {
925 error = ntfs_ntlookupattr(ntmp,
926 aname, anamelen,
927 &attrtype, &attrname);
928 if (error)
929 goto fail;
930 }
931
932 /* Check if we've found ourself */
933 if ((iep->ie_number == ip->i_number) &&
934 (attrtype == fp->f_attrtype) &&
935 ((!attrname && !fp->f_attrname) ||
936 (attrname && fp->f_attrname &&
937 !strcmp(attrname, fp->f_attrname))))
938 {
939 vref(vp);
940 *vpp = vp;
941 error = 0;
942 goto fail;
943 }
944
945 /* vget node, but don't load it */
946 error = ntfs_vgetex(ntmp->ntm_mountp,
947 iep->ie_number, attrtype, attrname,
948 LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
949 curthread, &nvp);
950
951 /* free the buffer returned by ntfs_ntlookupattr() */
952 if (attrname) {
953 kfree(attrname, M_TEMP);
954 attrname = NULL;
955 }
956
957 if (error)
958 goto fail;
959
960 nfp = VTOF(nvp);
961
962 if (nfp->f_flag & FN_VALID) {
963 *vpp = nvp;
964 goto fail;
965 }
966
967 nfp->f_fflag = iep->ie_fflag;
968 nfp->f_pnumber = iep->ie_fpnumber;
969 nfp->f_times = iep->ie_ftimes;
970
971 if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
972 (nfp->f_attrtype == NTFS_A_DATA) &&
973 (nfp->f_attrname == NULL))
974 f_type = VDIR;
975 else
976 f_type = VREG;
977
978 nvp->v_type = f_type;
979
980 if ((nfp->f_attrtype == NTFS_A_DATA) &&
981 (nfp->f_attrname == NULL))
982 {
983 /* Opening default attribute */
984 nfp->f_size = iep->ie_fsize;
985 nfp->f_allocated = iep->ie_fallocated;
986 nfp->f_flag |= FN_PRELOADED;
987 } else {
988 error = ntfs_filesize(ntmp, nfp,
989 &nfp->f_size, &nfp->f_allocated);
990 if (error) {
991 vput(nvp);
992 goto fail;
993 }
994 }
995 nfp->f_flag &= ~FN_VALID;
996
997 /*
998 * Normal files use the buffer cache
999 */
1000 if (nvp->v_type == VREG)
1001 vinitvmio(nvp, nfp->f_size, PAGE_SIZE, -1);
1002 *vpp = nvp;
1003 goto fail;
1004 }
1005
1006 /* Dive if possible */
1007 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
1008 dprintf(("ntfs_ntlookupfile: diving\n"));
1009
1010 cn = *(cn_t *) (rdbuf + aoff +
1011 iep->reclen - sizeof(cn_t));
1012 rdsize = blsize;
1013
1014 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
1015 ntfs_cntob(cn), rdsize, rdbuf, NULL);
1016 if (error)
1017 goto fail;
1018
1019 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1020 rdbuf, rdsize);
1021 if (error)
1022 goto fail;
1023
1024 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
1025 0x18);
1026 } else {
1027 dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
1028 error = ENOENT;
1029 break;
1030 }
1031 } while (1);
1032
1033 dprintf(("finish\n"));
1034
1035 fail:
1036 if (attrname) kfree(attrname, M_TEMP);
1037 ntfs_ntvattrrele(vap);
1038 ntfs_ntput(ip);
1039 kfree(rdbuf, M_TEMP);
1040 return (error);
1041 }
1042
1043 /*
1044 * Check if name type is permitted to show.
1045 */
1046 int
ntfs_isnamepermitted(struct ntfsmount * ntmp,struct attr_indexentry * iep)1047 ntfs_isnamepermitted(struct ntfsmount *ntmp, struct attr_indexentry *iep)
1048 {
1049 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
1050 return 1;
1051
1052 switch (iep->ie_fnametype) {
1053 case 2:
1054 ddprintf(("ntfs_isnamepermitted: skipped DOS name\n"));
1055 return 0;
1056 case 0: case 1: case 3:
1057 return 1;
1058 default:
1059 kprintf("ntfs_isnamepermitted: " \
1060 "WARNING! Unknown file name type: %d\n",
1061 iep->ie_fnametype);
1062 break;
1063 }
1064 return 0;
1065 }
1066
1067 /*
1068 * Read ntfs dir like stream of attr_indexentry, not like btree of them.
1069 * This is done by scaning $BITMAP:$I30 for busy clusters and reading them.
1070 * Ofcouse $INDEX_ROOT:$I30 is read before. Last read values are stored in
1071 * fnode, so we can skip toward record number num almost immediatly.
1072 * Anyway this is rather slow routine. The problem is that we don't know
1073 * how many records are there in $INDEX_ALLOCATION:$I30 block.
1074 */
1075 int
ntfs_ntreaddir(struct ntfsmount * ntmp,struct fnode * fp,u_int32_t num,struct attr_indexentry ** riepp)1076 ntfs_ntreaddir(struct ntfsmount *ntmp, struct fnode *fp,
1077 u_int32_t num, struct attr_indexentry **riepp)
1078 {
1079 struct ntnode *ip = FTONT(fp);
1080 struct ntvattr *vap = NULL; /* IndexRoot attribute */
1081 struct ntvattr *bmvap = NULL; /* BitMap attribute */
1082 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */
1083 caddr_t rdbuf; /* Buffer to read directory's blocks */
1084 u_char *bmp = NULL; /* Bitmap */
1085 u_int32_t blsize; /* Index allocation size (2048) */
1086 u_int32_t rdsize; /* Length of data to read */
1087 u_int32_t attrnum; /* Current attribute type */
1088 u_int32_t cpbl = 1; /* Clusters per directory block */
1089 u_int32_t blnum;
1090 struct attr_indexentry *iep;
1091 int error = ENOENT;
1092 u_int32_t aoff, cnum;
1093
1094 dprintf(("ntfs_ntreaddir: read ino: %"PRId64", num: %d\n", ip->i_number, num));
1095 error = ntfs_ntget(ip);
1096 if (error)
1097 return (error);
1098
1099 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
1100 if (error)
1101 return (ENOTDIR);
1102
1103 if (fp->f_dirblbuf == NULL) {
1104 fp->f_dirblsz = vap->va_a_iroot->ir_size;
1105 fp->f_dirblbuf = kmalloc(max(vap->va_datalen, fp->f_dirblsz),
1106 M_NTFSDIR, M_WAITOK);
1107 }
1108
1109 blsize = fp->f_dirblsz;
1110 rdbuf = fp->f_dirblbuf;
1111
1112 dprintf(("ntfs_ntreaddir: rdbuf: 0x%p, blsize: %d\n", rdbuf, blsize));
1113
1114 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
1115 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
1116 0, &bmvap);
1117 if (error) {
1118 error = ENOTDIR;
1119 goto fail;
1120 }
1121 bmp = kmalloc(bmvap->va_datalen, M_TEMP, M_WAITOK);
1122 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
1123 bmvap->va_datalen, bmp, NULL);
1124 if (error)
1125 goto fail;
1126
1127 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
1128 0, &iavap);
1129 if (error) {
1130 error = ENOTDIR;
1131 goto fail;
1132 }
1133 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
1134 dprintf(("ntfs_ntreaddir: indexalloc: %d, cpbl: %d\n",
1135 iavap->va_datalen, cpbl));
1136 } else {
1137 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
1138 iavap = bmvap = NULL;
1139 bmp = NULL;
1140 }
1141
1142 /* Try use previous values */
1143 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
1144 attrnum = fp->f_lastdattr;
1145 aoff = fp->f_lastdoff;
1146 blnum = fp->f_lastdblnum;
1147 cnum = fp->f_lastdnum;
1148 } else {
1149 attrnum = NTFS_A_INDXROOT;
1150 aoff = sizeof(struct attr_indexroot);
1151 blnum = 0;
1152 cnum = 0;
1153 }
1154
1155 do {
1156 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
1157 attrnum, blnum, cnum, num, aoff));
1158 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
1159 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
1160 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
1161 if (error)
1162 goto fail;
1163
1164 if (attrnum == NTFS_A_INDX) {
1165 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
1166 rdbuf, rdsize);
1167 if (error)
1168 goto fail;
1169 }
1170 if (aoff == 0)
1171 aoff = (attrnum == NTFS_A_INDX) ?
1172 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
1173 sizeof(struct attr_indexroot);
1174
1175 iep = (struct attr_indexentry *) (rdbuf + aoff);
1176 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
1177 aoff += iep->reclen,
1178 iep = (struct attr_indexentry *) (rdbuf + aoff))
1179 {
1180 if (!ntfs_isnamepermitted(ntmp, iep)) continue;
1181
1182 if (cnum >= num) {
1183 fp->f_lastdnum = cnum;
1184 fp->f_lastdoff = aoff;
1185 fp->f_lastdblnum = blnum;
1186 fp->f_lastdattr = attrnum;
1187
1188 *riepp = iep;
1189
1190 error = 0;
1191 goto fail;
1192 }
1193 cnum++;
1194 }
1195
1196 if (iavap) {
1197 if (attrnum == NTFS_A_INDXROOT)
1198 blnum = 0;
1199 else
1200 blnum++;
1201
1202 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
1203 if (bmp[blnum >> 3] & (1 << (blnum & 3)))
1204 break;
1205 blnum++;
1206 }
1207
1208 attrnum = NTFS_A_INDX;
1209 aoff = 0;
1210 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
1211 break;
1212 dprintf(("ntfs_ntreaddir: blnum: %d\n", blnum));
1213 }
1214 } while (iavap);
1215
1216 *riepp = NULL;
1217 fp->f_lastdnum = 0;
1218
1219 fail:
1220 if (vap)
1221 ntfs_ntvattrrele(vap);
1222 if (bmvap)
1223 ntfs_ntvattrrele(bmvap);
1224 if (iavap)
1225 ntfs_ntvattrrele(iavap);
1226 if (bmp)
1227 kfree(bmp, M_TEMP);
1228 ntfs_ntput(ip);
1229 return (error);
1230 }
1231
1232 /*
1233 * Convert NTFS times that are in 100 ns units and begins from
1234 * 1601 Jan 1 into unix times.
1235 */
1236 struct timespec
ntfs_nttimetounix(u_int64_t nt)1237 ntfs_nttimetounix(u_int64_t nt)
1238 {
1239 struct timespec t;
1240
1241 /* WindowNT times are in 100 ns and from 1601 Jan 1 */
1242 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
1243 t.tv_sec = nt / (1000 * 1000 * 10) -
1244 369LL * 365LL * 24LL * 60LL * 60LL -
1245 89LL * 1LL * 24LL * 60LL * 60LL;
1246 return (t);
1247 }
1248
1249 /*
1250 * Get file times from NTFS_A_NAME attribute.
1251 */
1252 int
ntfs_times(struct ntfsmount * ntmp,struct ntnode * ip,ntfs_times_t * tm)1253 ntfs_times(struct ntfsmount *ntmp, struct ntnode *ip, ntfs_times_t *tm)
1254 {
1255 struct ntvattr *vap;
1256 int error;
1257
1258 dprintf(("ntfs_times: ino: %"PRId64"...\n", ip->i_number));
1259
1260 error = ntfs_ntget(ip);
1261 if (error)
1262 return (error);
1263
1264 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
1265 if (error) {
1266 ntfs_ntput(ip);
1267 return (error);
1268 }
1269 *tm = vap->va_a_name->n_times;
1270 ntfs_ntvattrrele(vap);
1271 ntfs_ntput(ip);
1272
1273 return (0);
1274 }
1275
1276 /*
1277 * Get file sizes from corresponding attribute.
1278 *
1279 * ntnode under fnode should be locked.
1280 */
1281 int
ntfs_filesize(struct ntfsmount * ntmp,struct fnode * fp,u_int64_t * size,u_int64_t * bytes)1282 ntfs_filesize(struct ntfsmount *ntmp, struct fnode *fp, u_int64_t *size,
1283 u_int64_t *bytes)
1284 {
1285 struct ntvattr *vap;
1286 struct ntnode *ip = FTONT(fp);
1287 u_int64_t sz, bn;
1288 int error;
1289
1290 dprintf(("ntfs_filesize: ino: %"PRId64"\n", ip->i_number));
1291
1292 error = ntfs_ntvattrget(ntmp, ip,
1293 fp->f_attrtype, fp->f_attrname, 0, &vap);
1294 if (error)
1295 return (error);
1296
1297 bn = vap->va_allocated;
1298 sz = vap->va_datalen;
1299
1300 dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
1301 (u_int32_t) sz, (u_int32_t) bn));
1302
1303 if (size)
1304 *size = sz;
1305 if (bytes)
1306 *bytes = bn;
1307
1308 ntfs_ntvattrrele(vap);
1309
1310 return (0);
1311 }
1312
1313 /*
1314 * This is one of write routine.
1315 */
1316 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)1317 ntfs_writeattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1318 u_int32_t attrnum, char *attrname, off_t roff,
1319 size_t rsize, void *rdata, size_t *initp,
1320 struct uio *uio)
1321 {
1322 size_t init;
1323 int error = 0;
1324 off_t off = roff, left = rsize, towrite;
1325 caddr_t data = rdata;
1326 struct ntvattr *vap;
1327 *initp = 0;
1328
1329 while (left) {
1330 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1331 ntfs_btocn(off), &vap);
1332 if (error)
1333 return (error);
1334 towrite = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1335 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
1336 (u_int32_t) off, (u_int32_t) towrite,
1337 (u_int32_t) vap->va_vcnstart,
1338 (u_int32_t) vap->va_vcnend));
1339 error = ntfs_writentvattr_plain(ntmp, ip, vap,
1340 off - ntfs_cntob(vap->va_vcnstart),
1341 towrite, data, &init, uio);
1342 if (error) {
1343 kprintf("ntfs_writeattr_plain: " \
1344 "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
1345 (u_int32_t) off, (u_int32_t) towrite);
1346 kprintf("ntfs_writeattr_plain: attrib: %d - %d\n",
1347 (u_int32_t) vap->va_vcnstart,
1348 (u_int32_t) vap->va_vcnend);
1349 ntfs_ntvattrrele(vap);
1350 break;
1351 }
1352 ntfs_ntvattrrele(vap);
1353 left -= towrite;
1354 off += towrite;
1355 data = data + towrite;
1356 *initp += init;
1357 }
1358
1359 return (error);
1360 }
1361
1362 /*
1363 * This is one of write routine.
1364 *
1365 * ntnode should be locked.
1366 */
1367 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)1368 ntfs_writentvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1369 struct ntvattr *vap, off_t roff, size_t rsize,
1370 void *rdata, size_t *initp, struct uio *uio)
1371 {
1372 int error = 0;
1373 int off;
1374 int cnt;
1375 cn_t ccn, ccl, cn, left, cl;
1376 caddr_t data = rdata;
1377 struct buf *bp;
1378 size_t tocopy;
1379
1380 *initp = 0;
1381
1382 if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
1383 kprintf("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n");
1384 return ENOTTY;
1385 }
1386
1387 ddprintf(("ntfs_writentvattr_plain: data in run: %ld chains\n",
1388 vap->va_vruncnt));
1389
1390 off = roff;
1391 left = rsize;
1392 ccl = 0;
1393 ccn = 0;
1394 cnt = 0;
1395 for (; left && (cnt < vap->va_vruncnt); cnt++) {
1396 ccn = vap->va_vruncn[cnt];
1397 ccl = vap->va_vruncl[cnt];
1398
1399 ddprintf(("ntfs_writentvattr_plain: " \
1400 "left %d, cn: 0x%x, cl: %d, off: %d\n", \
1401 (u_int32_t) left, (u_int32_t) ccn, \
1402 (u_int32_t) ccl, (u_int32_t) off));
1403
1404 if (ntfs_cntob(ccl) < off) {
1405 off -= ntfs_cntob(ccl);
1406 cnt++;
1407 continue;
1408 }
1409 if (!ccn && ip->i_number != NTFS_BOOTINO)
1410 continue; /* XXX */
1411
1412 ccl -= ntfs_btocn(off);
1413 cn = ccn + ntfs_btocn(off);
1414 off = ntfs_btocnoff(off);
1415
1416 while (left && ccl) {
1417 /*
1418 * Always read and write single clusters at a time -
1419 * we need to avoid requesting differently-sized
1420 * blocks at the same disk offsets to avoid
1421 * confusing the buffer cache.
1422 */
1423 tocopy = min(left, ntfs_cntob(1) - off);
1424 cl = ntfs_btocl(tocopy + off);
1425 KASSERT(cl == 1 && tocopy <= ntfs_cntob(1),
1426 ("single cluster limit mistake"));
1427 ddprintf(("ntfs_writentvattr_plain: write: " \
1428 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
1429 (u_int32_t) cn, (u_int32_t) cl,
1430 (u_int32_t) off, (u_int32_t) tocopy,
1431 (u_int32_t) left));
1432 if (off == 0 && tocopy == ntfs_cntob(cl) &&
1433 uio->uio_segflg != UIO_NOCOPY) {
1434 bp = getblk(ntmp->ntm_devvp, ntfs_cntodoff(cn),
1435 ntfs_cntob(cl), 0, 0);
1436 clrbuf(bp);
1437 } else {
1438 error = bread(ntmp->ntm_devvp,
1439 ntfs_cntodoff(cn),
1440 ntfs_cntob(cl), &bp);
1441 if (error) {
1442 brelse(bp);
1443 return (error);
1444 }
1445 }
1446 if (uio)
1447 uiomovebp(bp, bp->b_data + off, tocopy, uio);
1448 else
1449 memcpy(bp->b_data + off, data, tocopy);
1450 bawrite(bp);
1451 data = data + tocopy;
1452 *initp += tocopy;
1453 off = 0;
1454 left -= tocopy;
1455 cn += cl;
1456 ccl -= cl;
1457 }
1458 }
1459
1460 if (left) {
1461 kprintf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
1462 error = EINVAL;
1463 }
1464
1465 return (error);
1466 }
1467
1468 /*
1469 * This is one of read routines.
1470 *
1471 * ntnode should be locked.
1472 */
1473 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)1474 ntfs_readntvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1475 struct ntvattr *vap, off_t roff, size_t rsize,
1476 void *rdata, size_t *initp, struct uio *uio)
1477 {
1478 int error = 0;
1479 int off;
1480
1481 *initp = 0;
1482 if (vap->va_flag & NTFS_AF_INRUN) {
1483 int cnt;
1484 cn_t ccn, ccl, cn, left, cl;
1485 caddr_t data = rdata;
1486 struct buf *bp;
1487 size_t tocopy;
1488
1489 ddprintf(("ntfs_readntvattr_plain: data in run: %ld chains\n",
1490 vap->va_vruncnt));
1491
1492 off = roff;
1493 left = rsize;
1494 ccl = 0;
1495 ccn = 0;
1496 cnt = 0;
1497 while (left && (cnt < vap->va_vruncnt)) {
1498 ccn = vap->va_vruncn[cnt];
1499 ccl = vap->va_vruncl[cnt];
1500
1501 ddprintf(("ntfs_readntvattr_plain: " \
1502 "left %d, cn: 0x%x, cl: %d, off: %d\n", \
1503 (u_int32_t) left, (u_int32_t) ccn, \
1504 (u_int32_t) ccl, (u_int32_t) off));
1505
1506 if (ntfs_cntob(ccl) < off) {
1507 off -= ntfs_cntob(ccl);
1508 cnt++;
1509 continue;
1510 }
1511 if (ccn || ip->i_number == NTFS_BOOTINO) {
1512 ccl -= ntfs_btocn(off);
1513 cn = ccn + ntfs_btocn(off);
1514 off = ntfs_btocnoff(off);
1515
1516 while (left && ccl) {
1517 tocopy = min(left,
1518 min(ntfs_cntob(ccl) - off,
1519 MAXBSIZE - off));
1520 cl = ntfs_btocl(tocopy + off);
1521
1522 /*
1523 * Always read single clusters at a
1524 * time - we need to avoid reading
1525 * differently-sized blocks at the
1526 * same disk offsets to avoid
1527 * confusing the buffer cache.
1528 */
1529 tocopy = min(left,
1530 ntfs_cntob(1) - off);
1531 cl = ntfs_btocl(tocopy + off);
1532 KASSERT(cl == 1 &&
1533 tocopy <= ntfs_cntob(1),
1534 ("single cluster limit mistake"));
1535
1536 ddprintf(("ntfs_readntvattr_plain: " \
1537 "read: cn: 0x%x cl: %d, " \
1538 "off: %d len: %d, left: %d\n",
1539 (u_int32_t) cn,
1540 (u_int32_t) cl,
1541 (u_int32_t) off,
1542 (u_int32_t) tocopy,
1543 (u_int32_t) left));
1544 error = bread(ntmp->ntm_devvp,
1545 ntfs_cntodoff(cn),
1546 ntfs_cntob(cl),
1547 &bp);
1548 if (error) {
1549 brelse(bp);
1550 return (error);
1551 }
1552 if (uio) {
1553 uiomovebp(bp, bp->b_data + off,
1554 tocopy, uio);
1555 } else {
1556 memcpy(data, bp->b_data + off,
1557 tocopy);
1558 }
1559 brelse(bp);
1560 data = data + tocopy;
1561 *initp += tocopy;
1562 off = 0;
1563 left -= tocopy;
1564 cn += cl;
1565 ccl -= cl;
1566 }
1567 } else {
1568 tocopy = min(left, ntfs_cntob(ccl) - off);
1569 ddprintf(("ntfs_readntvattr_plain: "
1570 "hole: ccn: 0x%x ccl: %d, off: %d, " \
1571 " len: %d, left: %d\n",
1572 (u_int32_t) ccn, (u_int32_t) ccl,
1573 (u_int32_t) off, (u_int32_t) tocopy,
1574 (u_int32_t) left));
1575 left -= tocopy;
1576 off = 0;
1577 if (uio) {
1578 size_t remains = tocopy;
1579 for(; remains; remains--)
1580 uiomove("", 1, uio);
1581 } else
1582 bzero(data, tocopy);
1583 data = data + tocopy;
1584 }
1585 cnt++;
1586 }
1587 if (left) {
1588 kprintf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
1589 error = E2BIG;
1590 }
1591 } else {
1592 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
1593 if (uio)
1594 uiomove(vap->va_datap + roff, rsize, uio);
1595 else
1596 memcpy(rdata, vap->va_datap + roff, rsize);
1597 *initp += rsize;
1598 }
1599
1600 return (error);
1601 }
1602
1603 /*
1604 * This is one of read routines.
1605 */
1606 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)1607 ntfs_readattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1608 u_int32_t attrnum, char *attrname, off_t roff,
1609 size_t rsize, void *rdata, size_t * initp,
1610 struct uio *uio)
1611 {
1612 size_t init;
1613 int error = 0;
1614 off_t off = roff, left = rsize, toread;
1615 caddr_t data = rdata;
1616 struct ntvattr *vap;
1617 *initp = 0;
1618
1619 while (left) {
1620 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1621 ntfs_btocn(off), &vap);
1622 if (error)
1623 return (error);
1624 toread = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
1625 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
1626 (u_int32_t) off, (u_int32_t) toread,
1627 (u_int32_t) vap->va_vcnstart,
1628 (u_int32_t) vap->va_vcnend));
1629 error = ntfs_readntvattr_plain(ntmp, ip, vap,
1630 off - ntfs_cntob(vap->va_vcnstart),
1631 toread, data, &init, uio);
1632 if (error) {
1633 kprintf("ntfs_readattr_plain: " \
1634 "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
1635 (u_int32_t) off, (u_int32_t) toread);
1636 kprintf("ntfs_readattr_plain: attrib: %d - %d\n",
1637 (u_int32_t) vap->va_vcnstart,
1638 (u_int32_t) vap->va_vcnend);
1639 ntfs_ntvattrrele(vap);
1640 break;
1641 }
1642 ntfs_ntvattrrele(vap);
1643 left -= toread;
1644 off += toread;
1645 data = data + toread;
1646 *initp += init;
1647 }
1648
1649 return (error);
1650 }
1651
1652 /*
1653 * This is one of read routines.
1654 */
1655 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)1656 ntfs_readattr(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t attrnum,
1657 char *attrname, off_t roff, size_t rsize, void *rdata,
1658 struct uio *uio)
1659 {
1660 int error = 0;
1661 struct ntvattr *vap;
1662 size_t init;
1663
1664 ddprintf(("ntfs_readattr: reading %"PRId64": 0x%x, from %d size %d bytes\n",
1665 ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
1666
1667 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
1668 if (error)
1669 return (error);
1670
1671 if ((roff > vap->va_datalen) ||
1672 (roff + rsize > vap->va_datalen)) {
1673 ddprintf(("ntfs_readattr: offset too big\n"));
1674 ntfs_ntvattrrele(vap);
1675 return (E2BIG);
1676 }
1677 if (vap->va_compression && vap->va_compressalg) {
1678 u_int8_t *cup;
1679 u_int8_t *uup;
1680 off_t off, left = rsize, tocopy;
1681 caddr_t data = rdata;
1682 cn_t cn;
1683
1684 ddprintf(("ntfs_ntreadattr: compression: %d\n",
1685 vap->va_compressalg));
1686
1687 cup = kmalloc(ntfs_cntob(NTFS_COMPUNIT_CL), M_NTFSDECOMP,
1688 M_WAITOK);
1689 uup = kmalloc(ntfs_cntob(NTFS_COMPUNIT_CL), M_NTFSDECOMP,
1690 M_WAITOK);
1691
1692 cn = rounddown2(ntfs_btocn(roff), NTFS_COMPUNIT_CL);
1693 off = roff - ntfs_cntob(cn);
1694
1695 while (left) {
1696 error = ntfs_readattr_plain(ntmp, ip, attrnum,
1697 attrname, ntfs_cntob(cn),
1698 ntfs_cntob(NTFS_COMPUNIT_CL),
1699 cup, &init, NULL);
1700 if (error)
1701 break;
1702
1703 tocopy = min(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
1704
1705 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
1706 if (uio)
1707 uiomove(cup + off, tocopy, uio);
1708 else
1709 memcpy(data, cup + off, tocopy);
1710 } else if (init == 0) {
1711 if (uio) {
1712 size_t remains = tocopy;
1713 for(; remains; remains--)
1714 uiomove("", 1, uio);
1715 }
1716 else
1717 bzero(data, tocopy);
1718 } else {
1719 error = ntfs_uncompunit(ntmp, uup, cup);
1720 if (error)
1721 break;
1722 if (uio)
1723 uiomove(uup + off, tocopy, uio);
1724 else
1725 memcpy(data, uup + off, tocopy);
1726 }
1727
1728 left -= tocopy;
1729 data = data + tocopy;
1730 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
1731 cn += NTFS_COMPUNIT_CL;
1732 }
1733
1734 kfree(uup, M_NTFSDECOMP);
1735 kfree(cup, M_NTFSDECOMP);
1736 } else
1737 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
1738 roff, rsize, rdata, &init, uio);
1739 ntfs_ntvattrrele(vap);
1740 return (error);
1741 }
1742
1743 #if 0 /* UNUSED */
1744 int
1745 ntfs_parserun(cn_t *cn, cn_t *cl, u_int8_t *run, u_long len, u_long *off)
1746 {
1747 u_int8_t sz;
1748 int i;
1749
1750 if (NULL == run) {
1751 kprintf("ntfs_parsetun: run == NULL\n");
1752 return (EINVAL);
1753 }
1754 sz = run[(*off)++];
1755 if (0 == sz) {
1756 kprintf("ntfs_parserun: trying to go out of run\n");
1757 return (E2BIG);
1758 }
1759 *cl = 0;
1760 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1761 kprintf("ntfs_parserun: " \
1762 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1763 sz, len, *off);
1764 return (EINVAL);
1765 }
1766 for (i = 0; i < (sz & 0xF); i++)
1767 *cl += (u_int32_t) run[(*off)++] << (i << 3);
1768
1769 sz >>= 4;
1770 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1771 kprintf("ntfs_parserun: " \
1772 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1773 sz, len, *off);
1774 return (EINVAL);
1775 }
1776 for (i = 0; i < (sz & 0xF); i++)
1777 *cn += (u_int32_t) run[(*off)++] << (i << 3);
1778
1779 return (0);
1780 }
1781 #endif
1782
1783 /*
1784 * Process fixup routine on given buffer.
1785 */
1786 int
ntfs_procfixups(struct ntfsmount * ntmp,u_int32_t magic,caddr_t buf,size_t len)1787 ntfs_procfixups(struct ntfsmount *ntmp, u_int32_t magic, caddr_t buf,
1788 size_t len)
1789 {
1790 struct fixuphdr *fhp = (struct fixuphdr *) buf;
1791 int i;
1792 u_int16_t fixup;
1793 u_int16_t *fxp;
1794 u_int16_t *cfxp;
1795
1796 if (fhp->fh_magic != magic) {
1797 kprintf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
1798 fhp->fh_magic, magic);
1799 return (EINVAL);
1800 }
1801 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
1802 kprintf("ntfs_procfixups: " \
1803 "bad fixups number: %d for %ld bytes block\n",
1804 fhp->fh_fnum, (long)len); /* XXX kprintf kludge */
1805 return (EINVAL);
1806 }
1807 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
1808 kprintf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
1809 return (EINVAL);
1810 }
1811 fxp = (u_int16_t *) (buf + fhp->fh_foff);
1812 cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
1813 fixup = *fxp++;
1814 for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
1815 if (*cfxp != fixup) {
1816 kprintf("ntfs_procfixups: fixup %d doesn't match\n", i);
1817 return (EINVAL);
1818 }
1819 *cfxp = *fxp;
1820 cfxp = (u_int16_t *)(((caddr_t) cfxp) + ntmp->ntm_bps);
1821 }
1822 return (0);
1823 }
1824
1825 #if 0 /* UNUSED */
1826 int
1827 ntfs_runtocn(cn_t *cn, struct ntfsmount *ntmp, u_int8_t *run, u_long len,
1828 cn_t vcn)
1829 {
1830 cn_t ccn = 0;
1831 cn_t ccl = 0;
1832 u_long off = 0;
1833 int error = 0;
1834
1835 #ifdef NTFS_DEBUG
1836 int i;
1837 kprintf("ntfs_runtocn: run: 0x%p, %ld bytes, vcn:%ld\n",
1838 run, len, (u_long) vcn);
1839 kprintf("ntfs_runtocn: run: ");
1840 for (i = 0; i < len; i++)
1841 kprintf("0x%02x ", run[i]);
1842 kprintf("\n");
1843 #endif
1844
1845 if (NULL == run) {
1846 kprintf("ntfs_runtocn: run == NULL\n");
1847 return (EINVAL);
1848 }
1849 do {
1850 if (run[off] == 0) {
1851 kprintf("ntfs_runtocn: vcn too big\n");
1852 return (E2BIG);
1853 }
1854 vcn -= ccl;
1855 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
1856 if (error) {
1857 kprintf("ntfs_runtocn: ntfs_parserun failed\n");
1858 return (error);
1859 }
1860 } while (ccl <= vcn);
1861 *cn = ccn + vcn;
1862 return (0);
1863 }
1864 #endif
1865
1866 /*
1867 * this initializes toupper table & dependant variables to be ready for
1868 * later work
1869 */
1870 void
ntfs_toupper_init(void)1871 ntfs_toupper_init(void)
1872 {
1873 ntfs_toupper_tab = NULL;
1874 lockinit(&ntfs_toupper_lock, "ntfs_toupper", 0, 0);
1875 ntfs_toupper_usecount = 0;
1876 }
1877
1878 /*
1879 * if the ntfs_toupper_tab[] is filled already, just raise use count;
1880 * otherwise read the data from the filesystem we are currently mounting
1881 */
1882 int
ntfs_toupper_use(struct mount * mp,struct ntfsmount * ntmp)1883 ntfs_toupper_use(struct mount *mp, struct ntfsmount *ntmp)
1884 {
1885 int error = 0;
1886 struct vnode *vp;
1887
1888 /* get exclusive access */
1889 LOCKMGR(&ntfs_toupper_lock, LK_EXCLUSIVE);
1890
1891 /* only read the translation data from a file if it hasn't been
1892 * read already */
1893 if (ntfs_toupper_tab)
1894 goto out;
1895
1896 /*
1897 * Read in Unicode lowercase -> uppercase translation file.
1898 * XXX for now, just the first 256 entries are used anyway,
1899 * so don't bother reading more
1900 */
1901 ntfs_toupper_tab = kmalloc(65536 * sizeof(wchar), M_NTFSRDATA,
1902 M_WAITOK);
1903
1904 if ((error = VFS_VGET(mp, NULL, NTFS_UPCASEINO, &vp)))
1905 goto out;
1906 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
1907 0, 65536*sizeof(wchar), (char *) ntfs_toupper_tab, NULL);
1908 vput(vp);
1909
1910 out:
1911 ntfs_toupper_usecount++;
1912 LOCKMGR(&ntfs_toupper_lock, LK_RELEASE);
1913 return (error);
1914 }
1915
1916 /*
1917 * lower the use count and if it reaches zero, free the memory
1918 * tied by toupper table
1919 */
1920 void
ntfs_toupper_unuse(void)1921 ntfs_toupper_unuse(void)
1922 {
1923 /* get exclusive access */
1924 LOCKMGR(&ntfs_toupper_lock, LK_EXCLUSIVE);
1925
1926 ntfs_toupper_usecount--;
1927 if (ntfs_toupper_usecount == 0) {
1928 kfree(ntfs_toupper_tab, M_NTFSRDATA);
1929 ntfs_toupper_tab = NULL;
1930 }
1931 #ifdef DIAGNOSTIC
1932 else if (ntfs_toupper_usecount < 0) {
1933 panic("ntfs_toupper_unuse(): use count negative: %d",
1934 ntfs_toupper_usecount);
1935 }
1936 #endif
1937
1938 /* release the lock */
1939 LOCKMGR(&ntfs_toupper_lock, LK_RELEASE);
1940 }
1941
1942 int
ntfs_u28_init(struct ntfsmount * ntmp,wchar * u2w,char * cs_local,char * cs_ntfs)1943 ntfs_u28_init(struct ntfsmount *ntmp, wchar *u2w, char *cs_local,
1944 char *cs_ntfs)
1945 {
1946 char ** u28;
1947 int i, j, h, l;
1948
1949 if (ntfs_iconv && cs_local) {
1950 ntfs_iconv->open(cs_local, cs_ntfs, &ntmp->ntm_ic_u2l);
1951 return (0);
1952 }
1953
1954 u28 = kmalloc(256 * sizeof(char *), M_TEMP, M_WAITOK | M_ZERO);
1955
1956 for (i=0; i<256; i++) {
1957 h = (u2w[i] >> 8) & 0xFF;
1958 l = (u2w[i]) &0xFF;
1959
1960 if (u28[h] == NULL) {
1961 u28[h] = kmalloc(256 * sizeof(char), M_TEMP, M_WAITOK);
1962 for (j=0; j<256; j++)
1963 u28[h][j] = '_';
1964 }
1965
1966 u28[h][l] = i & 0xFF;
1967 }
1968
1969 ntmp->ntm_u28 = u28;
1970
1971 return (0);
1972 }
1973
1974 int
ntfs_u28_uninit(struct ntfsmount * ntmp)1975 ntfs_u28_uninit(struct ntfsmount *ntmp)
1976 {
1977 char ** u28;
1978 int i;
1979
1980 if (ntmp->ntm_u28 == NULL) {
1981 if (ntfs_iconv && ntmp->ntm_ic_u2l) {
1982 ntfs_iconv->close(ntmp->ntm_ic_u2l);
1983 }
1984 return (0);
1985 }
1986
1987 if (ntmp->ntm_u28 == NULL)
1988 return (0);
1989
1990 u28 = ntmp->ntm_u28;
1991
1992 for (i=0; i<256; i++)
1993 if (u28[i] != NULL)
1994 kfree(u28[i], M_TEMP);
1995
1996 kfree(u28, M_TEMP);
1997
1998 return (0);
1999 }
2000
2001 int
ntfs_82u_init(struct ntfsmount * ntmp,char * cs_local,char * cs_ntfs)2002 ntfs_82u_init(struct ntfsmount *ntmp, char *cs_local, char *cs_ntfs)
2003
2004 {
2005 wchar * _82u;
2006 int i;
2007
2008 if (ntfs_iconv && cs_local) {
2009 ntfs_iconv->open(cs_ntfs, cs_local, &ntmp->ntm_ic_l2u);
2010 return (0);
2011 }
2012
2013 _82u = kmalloc(256 * sizeof(wchar), M_TEMP, M_WAITOK);
2014
2015 for (i=0; i<256; i++)
2016 _82u[i] = i;
2017
2018 ntmp->ntm_82u = _82u;
2019
2020 return (0);
2021 }
2022
2023 int
ntfs_82u_uninit(struct ntfsmount * ntmp)2024 ntfs_82u_uninit(struct ntfsmount *ntmp)
2025 {
2026 if (ntmp->ntm_82u == NULL) {
2027 if (ntfs_iconv && ntmp->ntm_ic_l2u) {
2028 ntfs_iconv->close(ntmp->ntm_ic_l2u);
2029 }
2030 return (0);
2031 }
2032
2033 kfree(ntmp->ntm_82u, M_TEMP);
2034 return (0);
2035 }
2036
2037 /*
2038 * maps the Unicode char to 8bit equivalent
2039 * XXX currently only gets lower 8bit from the Unicode char
2040 * and substitutes a '_' for it if the result would be '\0';
2041 * something better has to be definitely though out
2042 */
2043 wchar
ntfs_u28(struct ntfsmount * ntmp,wchar wc)2044 ntfs_u28(struct ntfsmount *ntmp, wchar wc)
2045 {
2046 char *p, *outp, inbuf[3], outbuf[3];
2047 size_t ilen, olen;
2048
2049 if (ntfs_iconv && ntmp->ntm_ic_u2l) {
2050 ilen = olen = 2;
2051 inbuf[0] = (char)(wc>>8);
2052 inbuf[1] = (char)wc;
2053 inbuf[2] = '\0';
2054 p = inbuf;
2055 outp = outbuf;
2056 ntfs_iconv->convchr(ntmp->ntm_ic_u2l,
2057 (const char **)(void *)&p, &ilen, &outp, &olen);
2058 if (olen == 1) {
2059 return ((wchar)(outbuf[0]&0xFF));
2060 } else if (olen == 0) {
2061 return ((wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF)));
2062 }
2063 return ('?');
2064 }
2065
2066 p = ntmp->ntm_u28[(wc>>8)&0xFF];
2067 if (p == NULL)
2068 return ('_');
2069 return (p[wc&0xFF]);
2070 }
2071
2072 wchar
ntfs_82u(struct ntfsmount * ntmp,wchar wc,int * len)2073 ntfs_82u(struct ntfsmount *ntmp,
2074 wchar wc,
2075 int *len)
2076 {
2077 char *p, *outp, inbuf[3], outbuf[3];
2078 wchar uc;
2079 size_t ilen, olen;
2080
2081 if (ntfs_iconv && ntmp->ntm_ic_l2u) {
2082 ilen = (size_t)*len;
2083 olen = 2;
2084
2085 inbuf[0] = (char)(wc>>8);
2086 inbuf[1] = (char)wc;
2087 inbuf[2] = '\0';
2088 p = inbuf;
2089 outp = outbuf;
2090 ntfs_iconv->convchr(ntmp->ntm_ic_l2u,
2091 (const char **)(void *)&p, &ilen, &outp, &olen);
2092 *len -= (int)ilen;
2093 uc = (wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF));
2094
2095 return (uc);
2096 }
2097
2098 if (ntmp->ntm_82u != NULL)
2099 return (ntmp->ntm_82u[wc&0xFF]);
2100
2101 return ('?');
2102 }
2103