ntfs_subr.c revision 1.30.2.3
1 /* $NetBSD: ntfs_subr.c,v 1.30.2.3 2007/07/15 13:27:30 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999 Semen Ustimenko (semenu (at) FreeBSD.org) 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * Id: ntfs_subr.c,v 1.4 1999/05/12 09:43:01 semenu Exp 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: ntfs_subr.c,v 1.30.2.3 2007/07/15 13:27:30 ad Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/namei.h> 37 #include <sys/proc.h> 38 #include <sys/kernel.h> 39 #include <sys/vnode.h> 40 #include <sys/mount.h> 41 #include <sys/buf.h> 42 #include <sys/file.h> 43 #include <sys/malloc.h> 44 #include <sys/lock.h> 45 #include <sys/kauth.h> 46 #if defined(__FreeBSD__) 47 #include <machine/clock.h> 48 #endif 49 50 #include <miscfs/specfs/specdev.h> 51 52 #include <fs/ntfs/ntfs.h> 53 #include <fs/ntfs/ntfsmount.h> 54 #include <fs/ntfs/ntfs_inode.h> 55 #include <fs/ntfs/ntfs_vfsops.h> 56 #include <fs/ntfs/ntfs_subr.h> 57 #include <fs/ntfs/ntfs_compr.h> 58 #include <fs/ntfs/ntfs_ihash.h> 59 60 #ifdef NTFS_DEBUG 61 int ntfs_debug = NTFS_DEBUG; 62 #endif 63 64 MALLOC_JUSTDEFINE(M_NTFSNTVATTR, "NTFS vattr", 65 "NTFS file attribute information"); 66 MALLOC_JUSTDEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data"); 67 MALLOC_JUSTDEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage"); 68 MALLOC_JUSTDEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary"); 69 70 /* Local struct used in ntfs_ntlookupfile() */ 71 struct ntfs_lookup_ctx { 72 u_int32_t aoff; 73 u_int32_t rdsize; 74 cn_t cn; 75 struct ntfs_lookup_ctx *prev; 76 }; 77 78 static int ntfs_ntlookupattr(struct ntfsmount *, const char *, int, 79 int *, char **); 80 static int ntfs_findvattr(struct ntfsmount *, struct ntnode *, 81 struct ntvattr **, struct ntvattr **, u_int32_t, const char *, 82 size_t, cn_t); 83 static int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t, 84 const char *, size_t); 85 static int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t, 86 const char *, size_t); 87 88 /* table for mapping Unicode chars into uppercase; it's filled upon first 89 * ntfs mount, freed upon last ntfs umount */ 90 static wchar *ntfs_toupper_tab; 91 #define NTFS_U28(ch) ((((ch) & 0xE0) == 0) ? '_' : (ch) & 0xFF) 92 #define NTFS_TOUPPER(ch) (ntfs_toupper_tab[(unsigned char)(ch)]) 93 static kmutex_t ntfs_toupper_lock; 94 static signed int ntfs_toupper_usecount; 95 96 /* support macro for ntfs_ntvattrget() */ 97 #define NTFS_AALPCMP(aalp,type,name,namelen) ( \ 98 (aalp->al_type == type) && (aalp->al_namelen == namelen) && \ 99 !ntfs_uastrcmp(ntmp, aalp->al_name,aalp->al_namelen,name,namelen) ) 100 101 /* 102 * 103 */ 104 int 105 ntfs_ntvattrrele(vap) 106 struct ntvattr * vap; 107 { 108 dprintf(("ntfs_ntvattrrele: ino: %llu, type: 0x%x\n", 109 (unsigned long long)vap->va_ip->i_number, vap->va_type)); 110 111 ntfs_ntrele(vap->va_ip); 112 113 return (0); 114 } 115 116 /* 117 * find the attribute in the ntnode 118 */ 119 static int 120 ntfs_findvattr(ntmp, ip, lvapp, vapp, type, name, namelen, vcn) 121 struct ntfsmount *ntmp; 122 struct ntnode *ip; 123 struct ntvattr **lvapp, **vapp; 124 u_int32_t type; 125 const char *name; 126 size_t namelen; 127 cn_t vcn; 128 { 129 int error; 130 struct ntvattr *vap; 131 132 if((ip->i_flag & IN_LOADED) == 0) { 133 dprintf(("ntfs_findvattr: node not loaded, ino: %llu\n", 134 (unsigned long long)ip->i_number)); 135 error = ntfs_loadntnode(ntmp,ip); 136 if (error) { 137 printf("ntfs_findvattr: FAILED TO LOAD INO: %llu\n", 138 (unsigned long long)ip->i_number); 139 return (error); 140 } 141 } 142 143 *lvapp = NULL; 144 *vapp = NULL; 145 for (vap = ip->i_valist.lh_first; vap; vap = vap->va_list.le_next) { 146 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %qu - %qu\n", 147 vap->va_type, (long long) vap->va_vcnstart, 148 (long long) vap->va_vcnend)); 149 if ((vap->va_type == type) && 150 (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) && 151 (vap->va_namelen == namelen) && 152 (strncmp(name, vap->va_name, namelen) == 0)) { 153 *vapp = vap; 154 ntfs_ntref(vap->va_ip); 155 return (0); 156 } 157 if (vap->va_type == NTFS_A_ATTRLIST) 158 *lvapp = vap; 159 } 160 161 return (-1); 162 } 163 164 /* 165 * Search attribute specified in ntnode (load ntnode if necessary). 166 * If not found but ATTR_A_ATTRLIST present, read it in and search through. 167 * VOP_VGET node needed, and lookup through its ntnode (load if nessesary). 168 * 169 * ntnode should be locked 170 */ 171 int 172 ntfs_ntvattrget( 173 struct ntfsmount * ntmp, 174 struct ntnode * ip, 175 u_int32_t type, 176 const char *name, 177 cn_t vcn, 178 struct ntvattr ** vapp) 179 { 180 struct ntvattr *lvap = NULL; 181 struct attr_attrlist *aalp; 182 struct attr_attrlist *nextaalp; 183 struct vnode *newvp; 184 struct ntnode *newip; 185 void * alpool; 186 size_t namelen, len; 187 int error; 188 189 *vapp = NULL; 190 191 if (name) { 192 dprintf(("ntfs_ntvattrget: " 193 "ino: %llu, type: 0x%x, name: %s, vcn: %qu\n", 194 (unsigned long long)ip->i_number, type, name, 195 (long long)vcn)); 196 namelen = strlen(name); 197 } else { 198 dprintf(("ntfs_ntvattrget: " 199 "ino: %llu, type: 0x%x, vcn: %qu\n", 200 (unsigned long long)ip->i_number, type, (long long)vcn)); 201 name = ""; 202 namelen = 0; 203 } 204 205 error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn); 206 if (error >= 0) 207 return (error); 208 209 if (!lvap) { 210 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " 211 "ino: %llu, type: 0x%x, name: %s, vcn: %qu\n", 212 (unsigned long long)ip->i_number, type, name, 213 (long long)vcn)); 214 return (ENOENT); 215 } 216 /* Scan $ATTRIBUTE_LIST for requested attribute */ 217 len = lvap->va_datalen; 218 alpool = (void *) malloc(len, M_TEMP, M_WAITOK); 219 error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len, 220 NULL); 221 if (error) 222 goto out; 223 224 aalp = (struct attr_attrlist *) alpool; 225 nextaalp = NULL; 226 227 for(; len > 0; aalp = nextaalp) { 228 KASSERT(aalp != NULL); 229 dprintf(("ntfs_ntvattrget: " 230 "attrlist: ino: %d, attr: 0x%x, vcn: %qu\n", 231 aalp->al_inumber, aalp->al_type, 232 (long long) aalp->al_vcnstart)); 233 234 if (len > aalp->reclen) { 235 nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *); 236 } else { 237 nextaalp = NULL; 238 } 239 len -= aalp->reclen; 240 241 if (!NTFS_AALPCMP(aalp, type, name, namelen) || 242 (nextaalp && (nextaalp->al_vcnstart <= vcn) && 243 NTFS_AALPCMP(nextaalp, type, name, namelen))) 244 continue; 245 246 dprintf(("ntfs_ntvattrget: attribute in ino: %d\n", 247 aalp->al_inumber)); 248 249 /* this is not a main record, so we can't use just plain 250 vget() */ 251 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber, 252 NTFS_A_DATA, NULL, LK_EXCLUSIVE, 253 VG_EXT, &newvp); 254 if (error) { 255 printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n", 256 aalp->al_inumber); 257 goto out; 258 } 259 newip = VTONT(newvp); 260 /* XXX have to lock ntnode */ 261 error = ntfs_findvattr(ntmp, newip, &lvap, vapp, 262 type, name, namelen, vcn); 263 vput(newvp); 264 if (error == 0) 265 goto out; 266 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n"); 267 break; 268 } 269 error = ENOENT; 270 271 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " 272 "ino: %llu, type: 0x%x, name: %.*s, vcn: %qu\n", 273 (unsigned long long)ip->i_number, type, (int)namelen, 274 name, (long long)vcn)); 275 out: 276 free(alpool, M_TEMP); 277 return (error); 278 } 279 280 /* 281 * Read ntnode from disk, make ntvattr list. 282 * 283 * ntnode should be locked 284 */ 285 int 286 ntfs_loadntnode( 287 struct ntfsmount * ntmp, 288 struct ntnode * ip) 289 { 290 struct filerec *mfrp; 291 daddr_t bn; 292 int error,off; 293 struct attr *ap; 294 struct ntvattr *nvap; 295 296 dprintf(("ntfs_loadntnode: loading ino: %llu\n", 297 (unsigned long long)ip->i_number)); 298 299 mfrp = (struct filerec *) malloc(ntfs_bntob(ntmp->ntm_bpmftrec), 300 M_TEMP, M_WAITOK); 301 302 if (ip->i_number < NTFS_SYSNODESNUM) { 303 struct buf *bp; 304 305 dprintf(("ntfs_loadntnode: read system node\n")); 306 307 bn = ntfs_cntobn(ntmp->ntm_mftcn) + 308 ntmp->ntm_bpmftrec * ip->i_number; 309 310 error = bread(ntmp->ntm_devvp, 311 bn, ntfs_bntob(ntmp->ntm_bpmftrec), 312 NOCRED, &bp); 313 if (error) { 314 printf("ntfs_loadntnode: BREAD FAILED\n"); 315 brelse(bp, 0); 316 goto out; 317 } 318 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec)); 319 bqrelse(bp); 320 } else { 321 struct vnode *vp; 322 323 vp = ntmp->ntm_sysvn[NTFS_MFTINO]; 324 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 325 ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec), 326 ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL); 327 if (error) { 328 printf("ntfs_loadntnode: ntfs_readattr failed\n"); 329 goto out; 330 } 331 } 332 333 /* Check if magic and fixups are correct */ 334 error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (void *)mfrp, 335 ntfs_bntob(ntmp->ntm_bpmftrec)); 336 if (error) { 337 printf("ntfs_loadntnode: BAD MFT RECORD %d\n", 338 (u_int32_t) ip->i_number); 339 goto out; 340 } 341 342 dprintf(("ntfs_loadntnode: load attrs for ino: %llu\n", 343 (unsigned long long)ip->i_number)); 344 off = mfrp->fr_attroff; 345 ap = (struct attr *) ((char *)mfrp + off); 346 347 LIST_INIT(&ip->i_valist); 348 349 while (ap->a_hdr.a_type != -1) { 350 error = ntfs_attrtontvattr(ntmp, &nvap, ap); 351 if (error) 352 break; 353 nvap->va_ip = ip; 354 355 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list); 356 357 off += ap->a_hdr.reclen; 358 ap = (struct attr *) ((char *)mfrp + off); 359 } 360 if (error) { 361 printf("ntfs_loadntnode: failed to load attr ino: %llu\n", 362 (unsigned long long)ip->i_number); 363 goto out; 364 } 365 366 ip->i_mainrec = mfrp->fr_mainrec; 367 ip->i_nlink = mfrp->fr_nlink; 368 ip->i_frflag = mfrp->fr_flags; 369 370 ip->i_flag |= IN_LOADED; 371 372 out: 373 free(mfrp, M_TEMP); 374 return (error); 375 } 376 377 /* 378 * Routine locks ntnode and increase usecount, just opposite of 379 * ntfs_ntput(). 380 */ 381 int 382 ntfs_ntget(ip) 383 struct ntnode *ip; 384 { 385 dprintf(("ntfs_ntget: get ntnode %llu: %p, usecount: %d\n", 386 (unsigned long long)ip->i_number, ip, ip->i_usecount)); 387 388 mutex_enter(&ip->i_interlock); 389 ip->i_usecount++; 390 lockmgr(&ip->i_lock, LK_EXCLUSIVE | LK_INTERLOCK, &ip->i_interlock); 391 392 return 0; 393 } 394 395 /* 396 * Routine search ntnode in hash, if found: lock, inc usecount and return. 397 * If not in hash allocate structure for ntnode, prefill it, lock, 398 * inc count and return. 399 * 400 * ntnode returned locked 401 */ 402 int 403 ntfs_ntlookup( 404 struct ntfsmount * ntmp, 405 ino_t ino, 406 struct ntnode ** ipp) 407 { 408 struct ntnode *ip; 409 410 dprintf(("ntfs_ntlookup: looking for ntnode %llu\n", 411 (unsigned long long)ino)); 412 413 if ((*ipp = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) { 414 ntfs_ntget(*ipp); 415 dprintf(("ntfs_ntlookup: ntnode %llu: %p," 416 " usecount: %d\n", 417 (unsigned long long)ino, *ipp, (*ipp)->i_usecount)); 418 return (0); 419 } 420 421 MALLOC(ip, struct ntnode *, sizeof(struct ntnode), 422 M_NTFSNTNODE, M_WAITOK); 423 ddprintf(("ntfs_ntlookup: allocating ntnode: %llu: %p\n", 424 (unsigned long long)ino, ip)); 425 bzero(ip, sizeof(struct ntnode)); 426 427 mutex_enter(&ntfs_hashlock); 428 if ((*ipp = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) { 429 mutex_exit(&ntfs_hashlock); 430 ntfs_ntget(*ipp); 431 FREE(ip, M_NTFSNTNODE); 432 dprintf(("ntfs_ntlookup: ntnode %llu: %p," 433 " usecount: %d\n", 434 (unsigned long long)ino, *ipp, (*ipp)->i_usecount)); 435 return (0); 436 } 437 438 /* Generic initialization */ 439 ip->i_devvp = ntmp->ntm_devvp; 440 ip->i_dev = ntmp->ntm_dev; 441 ip->i_number = ino; 442 ip->i_mp = ntmp; 443 444 LIST_INIT(&ip->i_fnlist); 445 446 /* init lock and lock the newborn ntnode */ 447 lockinit(&ip->i_lock, PINOD, "ntnode", 0, LK_EXCLUSIVE); 448 mutex_init(&ip->i_interlock, MUTEX_DEFAULT, IPL_NONE); 449 ntfs_ntget(ip); 450 451 ntfs_nthashins(ip); 452 453 mutex_exit(&ntfs_hashlock); 454 455 *ipp = ip; 456 457 dprintf(("ntfs_ntlookup: ntnode %llu: %p, usecount: %d\n", 458 (unsigned long long)ino, ip, ip->i_usecount)); 459 460 return (0); 461 } 462 463 /* 464 * Decrement usecount of ntnode and unlock it, if usecount reach zero, 465 * deallocate ntnode. 466 * 467 * ntnode should be locked on entry, and unlocked on return. 468 */ 469 void 470 ntfs_ntput(ip) 471 struct ntnode *ip; 472 { 473 struct ntvattr *vap; 474 475 dprintf(("ntfs_ntput: rele ntnode %llu: %p, usecount: %d\n", 476 (unsigned long long)ip->i_number, ip, ip->i_usecount)); 477 478 mutex_enter(&ip->i_interlock); 479 ip->i_usecount--; 480 481 #ifdef DIAGNOSTIC 482 if (ip->i_usecount < 0) { 483 panic("ntfs_ntput: ino: %llu usecount: %d ", 484 (unsigned long long)ip->i_number, ip->i_usecount); 485 } 486 #endif 487 488 lockmgr(&ip->i_lock, LK_RELEASE|LK_INTERLOCK, &ip->i_interlock); 489 490 if (ip->i_usecount == 0) { 491 dprintf(("ntfs_ntput: deallocating ntnode: %llu\n", 492 (unsigned long long)ip->i_number)); 493 494 if (ip->i_fnlist.lh_first) 495 panic("ntfs_ntput: ntnode has fnodes"); 496 497 ntfs_nthashrem(ip); 498 499 while (ip->i_valist.lh_first != NULL) { 500 vap = ip->i_valist.lh_first; 501 LIST_REMOVE(vap,va_list); 502 ntfs_freentvattr(vap); 503 } 504 mutex_destroy(&ip->i_interlock); 505 FREE(ip, M_NTFSNTNODE); 506 } 507 } 508 509 /* 510 * increment usecount of ntnode 511 */ 512 void 513 ntfs_ntref(ip) 514 struct ntnode *ip; 515 { 516 mutex_enter(&ip->i_interlock); 517 ip->i_usecount++; 518 mutex_exit(&ip->i_interlock); 519 520 dprintf(("ntfs_ntref: ino %llu, usecount: %d\n", 521 (unsigned long long)ip->i_number, ip->i_usecount)); 522 523 } 524 525 /* 526 * Decrement usecount of ntnode. 527 */ 528 void 529 ntfs_ntrele(ip) 530 struct ntnode *ip; 531 { 532 dprintf(("ntfs_ntrele: rele ntnode %llu: %p, usecount: %d\n", 533 (unsigned long long)ip->i_number, ip, ip->i_usecount)); 534 535 mutex_enter(&ip->i_interlock); 536 ip->i_usecount--; 537 538 if (ip->i_usecount < 0) 539 panic("ntfs_ntrele: ino: %llu usecount: %d ", 540 (unsigned long long)ip->i_number, ip->i_usecount); 541 mutex_exit(&ip->i_interlock); 542 } 543 544 /* 545 * Deallocate all memory allocated for ntvattr 546 */ 547 void 548 ntfs_freentvattr(vap) 549 struct ntvattr * vap; 550 { 551 if (vap->va_flag & NTFS_AF_INRUN) { 552 if (vap->va_vruncn) 553 free(vap->va_vruncn, M_NTFSRUN); 554 if (vap->va_vruncl) 555 free(vap->va_vruncl, M_NTFSRUN); 556 } else { 557 if (vap->va_datap) 558 free(vap->va_datap, M_NTFSRDATA); 559 } 560 FREE(vap, M_NTFSNTVATTR); 561 } 562 563 /* 564 * Convert disk image of attribute into ntvattr structure, 565 * runs are expanded also. 566 */ 567 int 568 ntfs_attrtontvattr( 569 struct ntfsmount * ntmp, 570 struct ntvattr ** rvapp, 571 struct attr * rap) 572 { 573 int error, i; 574 struct ntvattr *vap; 575 576 error = 0; 577 *rvapp = NULL; 578 579 MALLOC(vap, struct ntvattr *, sizeof(struct ntvattr), 580 M_NTFSNTVATTR, M_WAITOK); 581 bzero(vap, sizeof(struct ntvattr)); 582 vap->va_ip = NULL; 583 vap->va_flag = rap->a_hdr.a_flag; 584 vap->va_type = rap->a_hdr.a_type; 585 vap->va_compression = rap->a_hdr.a_compression; 586 vap->va_index = rap->a_hdr.a_index; 587 588 ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index)); 589 590 vap->va_namelen = rap->a_hdr.a_namelen; 591 if (rap->a_hdr.a_namelen) { 592 wchar *unp = (wchar *)((char *)rap + rap->a_hdr.a_nameoff); 593 ddprintf((", name:[")); 594 for (i = 0; i < vap->va_namelen; i++) { 595 vap->va_name[i] = unp[i]; 596 ddprintf(("%c", vap->va_name[i])); 597 } 598 ddprintf(("]")); 599 } 600 if (vap->va_flag & NTFS_AF_INRUN) { 601 ddprintf((", nonres.")); 602 vap->va_datalen = rap->a_nr.a_datalen; 603 vap->va_allocated = rap->a_nr.a_allocated; 604 vap->va_vcnstart = rap->a_nr.a_vcnstart; 605 vap->va_vcnend = rap->a_nr.a_vcnend; 606 vap->va_compressalg = rap->a_nr.a_compressalg; 607 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl), 608 &(vap->va_vruncnt), 609 (u_int8_t *) rap + rap->a_nr.a_dataoff); 610 } else { 611 vap->va_compressalg = 0; 612 ddprintf((", res.")); 613 vap->va_datalen = rap->a_r.a_datalen; 614 vap->va_allocated = rap->a_r.a_datalen; 615 vap->va_vcnstart = 0; 616 vap->va_vcnend = ntfs_btocn(vap->va_allocated); 617 vap->va_datap = (void *) malloc(vap->va_datalen, 618 M_NTFSRDATA, M_WAITOK); 619 memcpy(vap->va_datap, (char *)rap + rap->a_r.a_dataoff, 620 rap->a_r.a_datalen); 621 } 622 ddprintf((", len: %qu", (long long)vap->va_datalen)); 623 624 if (error) 625 FREE(vap, M_NTFSNTVATTR); 626 else 627 *rvapp = vap; 628 629 ddprintf(("\n")); 630 631 return (error); 632 } 633 634 /* 635 * Expand run into more utilizable and more memory eating format. 636 */ 637 int 638 ntfs_runtovrun( 639 cn_t ** rcnp, 640 cn_t ** rclp, 641 u_long * rcntp, 642 u_int8_t * run) 643 { 644 u_int32_t off; 645 u_int32_t sz, i; 646 cn_t *cn; 647 cn_t *cl; 648 u_long cnt; 649 cn_t prev; 650 cn_t tmp; 651 652 off = 0; 653 cnt = 0; 654 i = 0; 655 while (run[off]) { 656 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1; 657 cnt++; 658 } 659 cn = (cn_t *) malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK); 660 cl = (cn_t *) malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK); 661 662 off = 0; 663 cnt = 0; 664 prev = 0; 665 while (run[off]) { 666 667 sz = run[off++]; 668 cl[cnt] = 0; 669 670 for (i = 0; i < (sz & 0xF); i++) 671 cl[cnt] += (u_int32_t) run[off++] << (i << 3); 672 673 sz >>= 4; 674 if (run[off + sz - 1] & 0x80) { 675 tmp = ((u_int64_t) - 1) << (sz << 3); 676 for (i = 0; i < sz; i++) 677 tmp |= (u_int64_t) run[off++] << (i << 3); 678 } else { 679 tmp = 0; 680 for (i = 0; i < sz; i++) 681 tmp |= (u_int64_t) run[off++] << (i << 3); 682 } 683 if (tmp) 684 prev = cn[cnt] = prev + tmp; 685 else 686 cn[cnt] = tmp; 687 688 cnt++; 689 } 690 *rcnp = cn; 691 *rclp = cl; 692 *rcntp = cnt; 693 return (0); 694 } 695 696 /* 697 * Compare unicode and ascii string case insens. 698 */ 699 static int 700 ntfs_uastricmp(ntmp, ustr, ustrlen, astr, astrlen) 701 struct ntfsmount *ntmp; 702 const wchar *ustr; 703 size_t ustrlen; 704 const char *astr; 705 size_t astrlen; 706 { 707 size_t i; 708 int res; 709 710 for (i = 0; i < ustrlen && astrlen > 0; i++) { 711 res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i]), 712 NTFS_TOUPPER((*ntmp->ntm_wget)(&astr, &astrlen)) ); 713 if (res) 714 return res; 715 } 716 717 if (i == ustrlen && astrlen == 0) 718 return 0; 719 else if (i == ustrlen) 720 return -1; 721 else 722 return 1; 723 } 724 725 /* 726 * Compare unicode and ascii string case sens. 727 */ 728 static int 729 ntfs_uastrcmp(ntmp, ustr, ustrlen, astr, astrlen) 730 struct ntfsmount *ntmp; 731 const wchar *ustr; 732 size_t ustrlen; 733 const char *astr; 734 size_t astrlen; 735 { 736 size_t i; 737 int res; 738 739 for (i = 0; (i < ustrlen) && astrlen > 0; i++) { 740 res = (*ntmp->ntm_wcmp)(ustr[i], 741 (*ntmp->ntm_wget)(&astr, &astrlen)); 742 if (res) 743 return res; 744 } 745 746 if (i == ustrlen && astrlen == 0) 747 return 0; 748 else if (i == ustrlen) 749 return -1; 750 else 751 return 1; 752 } 753 754 /* 755 * Search fnode in ntnode, if not found allocate and preinitialize. 756 * 757 * ntnode should be locked on entry. 758 */ 759 int 760 ntfs_fget( 761 struct ntfsmount *ntmp, 762 struct ntnode *ip, 763 int attrtype, 764 char *attrname, 765 struct fnode **fpp 766 ) 767 { 768 struct fnode *fp; 769 770 dprintf(("ntfs_fget: ino: %llu, attrtype: 0x%x, attrname: %s\n", 771 (unsigned long long)ip->i_number, attrtype, attrname?attrname:"")); 772 *fpp = NULL; 773 for (fp = ip->i_fnlist.lh_first; fp != NULL; fp = fp->f_fnlist.le_next){ 774 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n", 775 fp->f_attrtype, fp->f_attrname?fp->f_attrname:"")); 776 777 if ((attrtype == fp->f_attrtype) && 778 ((!attrname && !fp->f_attrname) || 779 (attrname && fp->f_attrname && 780 !strcmp(attrname,fp->f_attrname)))){ 781 dprintf(("ntfs_fget: found existed: %p\n",fp)); 782 *fpp = fp; 783 } 784 } 785 786 if (*fpp) 787 return (0); 788 789 MALLOC(fp, struct fnode *, sizeof(struct fnode), M_NTFSFNODE, M_WAITOK); 790 bzero(fp, sizeof(struct fnode)); 791 dprintf(("ntfs_fget: allocating fnode: %p\n",fp)); 792 793 fp->f_ip = ip; 794 fp->f_attrname = attrname; 795 if (fp->f_attrname) fp->f_flag |= FN_AATTRNAME; 796 fp->f_attrtype = attrtype; 797 798 ntfs_ntref(ip); 799 800 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist); 801 802 *fpp = fp; 803 804 return (0); 805 } 806 807 /* 808 * Deallocate fnode, remove it from ntnode's fnode list. 809 * 810 * ntnode should be locked. 811 */ 812 void 813 ntfs_frele( 814 struct fnode *fp) 815 { 816 struct ntnode *ip = FTONT(fp); 817 818 dprintf(("ntfs_frele: fnode: %p for %llu: %p\n", fp, 819 (unsigned long long)ip->i_number, ip)); 820 821 dprintf(("ntfs_frele: deallocating fnode\n")); 822 LIST_REMOVE(fp,f_fnlist); 823 if (fp->f_flag & FN_AATTRNAME) 824 FREE(fp->f_attrname, M_TEMP); 825 if (fp->f_dirblbuf) 826 FREE(fp->f_dirblbuf, M_NTFSDIR); 827 FREE(fp, M_NTFSFNODE); 828 ntfs_ntrele(ip); 829 } 830 831 /* 832 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 833 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs. 834 * If $ATTR_TYPE not specified, ATTR_A_DATA assumed. 835 */ 836 static int 837 ntfs_ntlookupattr( 838 struct ntfsmount * ntmp, 839 const char * name, 840 int namelen, 841 int *attrtype, 842 char **attrname) 843 { 844 const char *sys; 845 size_t syslen, i; 846 struct ntvattrdef *adp; 847 848 if (namelen == 0) 849 return (0); 850 851 if (name[0] == '$') { 852 sys = name; 853 for (syslen = 0; syslen < namelen; syslen++) { 854 if(sys[syslen] == ':') { 855 name++; 856 namelen--; 857 break; 858 } 859 } 860 name += syslen; 861 namelen -= syslen; 862 863 adp = ntmp->ntm_ad; 864 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){ 865 if (syslen != adp->ad_namelen || 866 strncmp(sys, adp->ad_name, syslen) != 0) 867 continue; 868 869 *attrtype = adp->ad_type; 870 goto out; 871 } 872 return (ENOENT); 873 } 874 875 out: 876 if (namelen) { 877 *attrname = (char *) malloc(namelen, M_TEMP, M_WAITOK); 878 memcpy((*attrname), name, namelen); 879 (*attrname)[namelen] = '\0'; 880 *attrtype = NTFS_A_DATA; 881 } 882 883 return (0); 884 } 885 886 /* 887 * Lookup specified node for filename, matching cnp, 888 * return fnode filled. 889 */ 890 int 891 ntfs_ntlookupfile( 892 struct ntfsmount * ntmp, 893 struct vnode * vp, 894 struct componentname * cnp, 895 struct vnode ** vpp) 896 { 897 struct fnode *fp = VTOF(vp); 898 struct ntnode *ip = FTONT(fp); 899 struct ntvattr *vap; /* Root attribute */ 900 cn_t cn = 0; /* VCN in current attribute */ 901 void * rdbuf; /* Buffer to read directory's blocks */ 902 u_int32_t blsize; 903 u_int32_t rdsize; /* Length of data to read from current block */ 904 struct attr_indexentry *iep; 905 int error, res, anamelen, fnamelen; 906 const char *fname,*aname; 907 u_int32_t aoff; 908 int attrtype = NTFS_A_DATA; 909 char *attrname = NULL; 910 struct fnode *nfp; 911 struct vnode *nvp; 912 enum vtype f_type; 913 int fullscan = 0; 914 struct ntfs_lookup_ctx *lookup_ctx = NULL, *tctx; 915 916 error = ntfs_ntget(ip); 917 if (error) 918 return (error); 919 920 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap); 921 if (error || (vap->va_flag & NTFS_AF_INRUN)) 922 return (ENOTDIR); 923 924 /* 925 * Divide file name into: foofilefoofilefoofile[:attrspec] 926 * Store like this: fname:fnamelen [aname:anamelen] 927 */ 928 fname = cnp->cn_nameptr; 929 aname = NULL; 930 anamelen = 0; 931 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++) 932 if(fname[fnamelen] == ':') { 933 aname = fname + fnamelen + 1; 934 anamelen = cnp->cn_namelen - fnamelen - 1; 935 dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n", 936 fname, fnamelen, aname, anamelen)); 937 break; 938 } 939 940 blsize = vap->va_a_iroot->ir_size; 941 dprintf(("ntfs_ntlookupfile: blksz: %d\n", blsize)); 942 943 rdbuf = (void *) malloc(blsize, M_TEMP, M_WAITOK); 944 945 loop: 946 rdsize = vap->va_datalen; 947 dprintf(("ntfs_ntlookupfile: rdsz: %d\n", rdsize)); 948 949 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30", 950 0, rdsize, rdbuf, NULL); 951 if (error) 952 goto fail; 953 954 aoff = sizeof(struct attr_indexroot); 955 956 do { 957 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff); 958 959 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff); 960 aoff += iep->reclen, 961 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff)) 962 { 963 ddprintf(("scan: %d, %d\n", 964 (u_int32_t) iep->ie_number, 965 (u_int32_t) iep->ie_fnametype)); 966 967 /* check the name - the case-insensitive check 968 * has to come first, to break from this for loop 969 * if needed, so we can dive correctly */ 970 res = ntfs_uastricmp(ntmp, iep->ie_fname, 971 iep->ie_fnamelen, fname, fnamelen); 972 if (!fullscan) { 973 if (res > 0) break; 974 if (res < 0) continue; 975 } 976 977 if (iep->ie_fnametype == 0 || 978 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS)) 979 { 980 res = ntfs_uastrcmp(ntmp, iep->ie_fname, 981 iep->ie_fnamelen, fname, fnamelen); 982 if (res != 0 && !fullscan) continue; 983 } 984 985 /* if we perform full scan, the file does not match 986 * and this is subnode, dive */ 987 if (fullscan && res != 0) { 988 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) { 989 MALLOC(tctx, struct ntfs_lookup_ctx *, 990 sizeof(struct ntfs_lookup_ctx), 991 M_TEMP, M_WAITOK); 992 tctx->aoff = aoff + iep->reclen; 993 tctx->rdsize = rdsize; 994 tctx->cn = cn; 995 tctx->prev = lookup_ctx; 996 lookup_ctx = tctx; 997 break; 998 } else 999 continue; 1000 } 1001 1002 if (aname) { 1003 error = ntfs_ntlookupattr(ntmp, 1004 aname, anamelen, 1005 &attrtype, &attrname); 1006 if (error) 1007 goto fail; 1008 } 1009 1010 /* Check if we've found ourselves */ 1011 if ((iep->ie_number == ip->i_number) && 1012 (attrtype == fp->f_attrtype) && 1013 ((!attrname && !fp->f_attrname) || 1014 (attrname && fp->f_attrname && 1015 !strcmp(attrname, fp->f_attrname)))) 1016 { 1017 VREF(vp); 1018 *vpp = vp; 1019 error = 0; 1020 goto fail; 1021 } 1022 1023 /* free the buffer returned by ntfs_ntlookupattr() */ 1024 if (attrname) { 1025 FREE(attrname, M_TEMP); 1026 attrname = NULL; 1027 } 1028 1029 /* vget node, but don't load it */ 1030 error = ntfs_vgetex(ntmp->ntm_mountp, 1031 iep->ie_number, attrtype, attrname, 1032 LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN, 1033 &nvp); 1034 if (error) 1035 goto fail; 1036 1037 nfp = VTOF(nvp); 1038 1039 if (nfp->f_flag & FN_VALID) { 1040 *vpp = nvp; 1041 goto fail; 1042 } 1043 1044 nfp->f_fflag = iep->ie_fflag; 1045 nfp->f_pnumber = iep->ie_fpnumber; 1046 nfp->f_times = iep->ie_ftimes; 1047 1048 if((nfp->f_fflag & NTFS_FFLAG_DIR) && 1049 (nfp->f_attrtype == NTFS_A_DATA) && 1050 (nfp->f_attrname == NULL)) 1051 f_type = VDIR; 1052 else 1053 f_type = VREG; 1054 1055 nvp->v_type = f_type; 1056 1057 if ((nfp->f_attrtype == NTFS_A_DATA) && 1058 (nfp->f_attrname == NULL)) 1059 { 1060 /* Opening default attribute */ 1061 nfp->f_size = iep->ie_fsize; 1062 nfp->f_allocated = iep->ie_fallocated; 1063 nfp->f_flag |= FN_PRELOADED; 1064 } else { 1065 error = ntfs_filesize(ntmp, nfp, 1066 &nfp->f_size, &nfp->f_allocated); 1067 if (error) { 1068 vput(nvp); 1069 goto fail; 1070 } 1071 } 1072 1073 nfp->f_flag &= ~FN_VALID; 1074 *vpp = nvp; 1075 goto fail; 1076 } 1077 1078 /* Dive if possible */ 1079 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) { 1080 dprintf(("ntfs_ntlookupfile: diving\n")); 1081 1082 cn = *(cn_t *) ((char *)rdbuf + aoff + 1083 iep->reclen - sizeof(cn_t)); 1084 rdsize = blsize; 1085 1086 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30", 1087 ntfs_cntob(cn), rdsize, rdbuf, NULL); 1088 if (error) 1089 goto fail; 1090 1091 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1092 rdbuf, rdsize); 1093 if (error) 1094 goto fail; 1095 1096 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize + 1097 0x18); 1098 } else if (fullscan && lookup_ctx) { 1099 cn = lookup_ctx->cn; 1100 aoff = lookup_ctx->aoff; 1101 rdsize = lookup_ctx->rdsize; 1102 1103 error = ntfs_readattr(ntmp, ip, 1104 (cn == 0) ? NTFS_A_INDXROOT : NTFS_A_INDX, 1105 "$I30", ntfs_cntob(cn), rdsize, rdbuf, NULL); 1106 if (error) 1107 goto fail; 1108 1109 if (cn != 0) { 1110 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1111 rdbuf, rdsize); 1112 if (error) 1113 goto fail; 1114 } 1115 1116 tctx = lookup_ctx; 1117 lookup_ctx = lookup_ctx->prev; 1118 FREE(tctx, M_TEMP); 1119 } else { 1120 dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n")); 1121 error = ENOENT; 1122 break; 1123 } 1124 } while (1); 1125 1126 /* perform full scan if no entry was found */ 1127 if (!fullscan && error == ENOENT) { 1128 fullscan = 1; 1129 cn = 0; /* need zero, used by lookup_ctx */ 1130 1131 ddprintf(("ntfs_ntlookupfile: fullscan performed for: %.*s\n", 1132 (int) fnamelen, fname)); 1133 goto loop; 1134 } 1135 1136 dprintf(("finish\n")); 1137 1138 fail: 1139 if (attrname) 1140 FREE(attrname, M_TEMP); 1141 if (lookup_ctx) { 1142 while(lookup_ctx) { 1143 tctx = lookup_ctx; 1144 lookup_ctx = lookup_ctx->prev; 1145 FREE(tctx, M_TEMP); 1146 } 1147 } 1148 ntfs_ntvattrrele(vap); 1149 ntfs_ntput(ip); 1150 free(rdbuf, M_TEMP); 1151 return (error); 1152 } 1153 1154 /* 1155 * Check if name type is permitted to show. 1156 */ 1157 int 1158 ntfs_isnamepermitted( 1159 struct ntfsmount * ntmp, 1160 struct attr_indexentry * iep) 1161 { 1162 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES) 1163 return 1; 1164 1165 switch (iep->ie_fnametype) { 1166 case 2: 1167 ddprintf(("ntfs_isnamepermitted: skipped DOS name\n")); 1168 return 0; 1169 case 0: case 1: case 3: 1170 return 1; 1171 default: 1172 printf("ntfs_isnamepermitted: " 1173 "WARNING! Unknown file name type: %d\n", 1174 iep->ie_fnametype); 1175 break; 1176 } 1177 return 0; 1178 } 1179 1180 /* 1181 * Read ntfs dir like stream of attr_indexentry, not like btree of them. 1182 * This is done by scanning $BITMAP:$I30 for busy clusters and reading them. 1183 * Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in 1184 * fnode, so we can skip toward record number num almost immediately. 1185 * Anyway this is rather slow routine. The problem is that we don't know 1186 * how many records are there in $INDEX_ALLOCATION:$I30 block. 1187 */ 1188 int 1189 ntfs_ntreaddir( 1190 struct ntfsmount * ntmp, 1191 struct fnode * fp, 1192 u_int32_t num, 1193 struct attr_indexentry ** riepp) 1194 { 1195 struct ntnode *ip = FTONT(fp); 1196 struct ntvattr *vap = NULL; /* IndexRoot attribute */ 1197 struct ntvattr *bmvap = NULL; /* BitMap attribute */ 1198 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */ 1199 void * rdbuf; /* Buffer to read directory's blocks */ 1200 u_char *bmp = NULL; /* Bitmap */ 1201 u_int32_t blsize; /* Index allocation size (2048) */ 1202 u_int32_t rdsize; /* Length of data to read */ 1203 u_int32_t attrnum; /* Current attribute type */ 1204 u_int32_t cpbl = 1; /* Clusters per directory block */ 1205 u_int32_t blnum; 1206 struct attr_indexentry *iep; 1207 int error = ENOENT; 1208 u_int32_t aoff, cnum; 1209 1210 dprintf(("ntfs_ntreaddir: read ino: %llu, num: %d\n", 1211 (unsigned long long)ip->i_number, num)); 1212 error = ntfs_ntget(ip); 1213 if (error) 1214 return (error); 1215 1216 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap); 1217 if (error) 1218 return (ENOTDIR); 1219 1220 if (fp->f_dirblbuf == NULL) { 1221 fp->f_dirblsz = vap->va_a_iroot->ir_size; 1222 fp->f_dirblbuf = (void *) malloc( 1223 MAX(vap->va_datalen,fp->f_dirblsz), M_NTFSDIR, M_WAITOK); 1224 } 1225 1226 blsize = fp->f_dirblsz; 1227 rdbuf = fp->f_dirblbuf; 1228 1229 dprintf(("ntfs_ntreaddir: rdbuf: %p, blsize: %d\n", rdbuf, blsize)); 1230 1231 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) { 1232 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 1233 0, &bmvap); 1234 if (error) { 1235 error = ENOTDIR; 1236 goto fail; 1237 } 1238 bmp = (u_char *) malloc(bmvap->va_datalen, M_TEMP, M_WAITOK); 1239 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0, 1240 bmvap->va_datalen, bmp, NULL); 1241 if (error) 1242 goto fail; 1243 1244 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30", 1245 0, &iavap); 1246 if (error) { 1247 error = ENOTDIR; 1248 goto fail; 1249 } 1250 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1); 1251 dprintf(("ntfs_ntreaddir: indexalloc: %qu, cpbl: %d\n", 1252 (long long)iavap->va_datalen, cpbl)); 1253 } else { 1254 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n")); 1255 iavap = bmvap = NULL; 1256 bmp = NULL; 1257 } 1258 1259 /* Try use previous values */ 1260 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) { 1261 attrnum = fp->f_lastdattr; 1262 aoff = fp->f_lastdoff; 1263 blnum = fp->f_lastdblnum; 1264 cnum = fp->f_lastdnum; 1265 } else { 1266 attrnum = NTFS_A_INDXROOT; 1267 aoff = sizeof(struct attr_indexroot); 1268 blnum = 0; 1269 cnum = 0; 1270 } 1271 1272 do { 1273 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n", 1274 attrnum, (u_int32_t) blnum, cnum, num, aoff)); 1275 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize; 1276 error = ntfs_readattr(ntmp, ip, attrnum, "$I30", 1277 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL); 1278 if (error) 1279 goto fail; 1280 1281 if (attrnum == NTFS_A_INDX) { 1282 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1283 rdbuf, rdsize); 1284 if (error) 1285 goto fail; 1286 } 1287 if (aoff == 0) 1288 aoff = (attrnum == NTFS_A_INDX) ? 1289 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) : 1290 sizeof(struct attr_indexroot); 1291 1292 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff); 1293 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff); 1294 aoff += iep->reclen, 1295 iep = (struct attr_indexentry *) ((char *)rdbuf + aoff)) 1296 { 1297 if (!ntfs_isnamepermitted(ntmp, iep)) continue; 1298 1299 if (cnum >= num) { 1300 fp->f_lastdnum = cnum; 1301 fp->f_lastdoff = aoff; 1302 fp->f_lastdblnum = blnum; 1303 fp->f_lastdattr = attrnum; 1304 1305 *riepp = iep; 1306 1307 error = 0; 1308 goto fail; 1309 } 1310 cnum++; 1311 } 1312 1313 if (iavap) { 1314 if (attrnum == NTFS_A_INDXROOT) 1315 blnum = 0; 1316 else 1317 blnum++; 1318 1319 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) { 1320 if (bmp[blnum >> 3] & (1 << (blnum & 3))) 1321 break; 1322 blnum++; 1323 } 1324 1325 attrnum = NTFS_A_INDX; 1326 aoff = 0; 1327 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen) 1328 break; 1329 dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum)); 1330 } 1331 } while (iavap); 1332 1333 *riepp = NULL; 1334 fp->f_lastdnum = 0; 1335 1336 fail: 1337 if (vap) 1338 ntfs_ntvattrrele(vap); 1339 if (bmvap) 1340 ntfs_ntvattrrele(bmvap); 1341 if (iavap) 1342 ntfs_ntvattrrele(iavap); 1343 if (bmp) 1344 FREE(bmp, M_TEMP); 1345 ntfs_ntput(ip); 1346 return (error); 1347 } 1348 1349 /* 1350 * Convert NTFS times that are in 100 ns units and begins from 1351 * 1601 Jan 1 into unix times. 1352 */ 1353 struct timespec 1354 ntfs_nttimetounix( 1355 u_int64_t nt) 1356 { 1357 struct timespec t; 1358 1359 /* WindowNT times are in 100 ns and from 1601 Jan 1 */ 1360 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100; 1361 t.tv_sec = nt / (1000 * 1000 * 10) - 1362 369LL * 365LL * 24LL * 60LL * 60LL - 1363 89LL * 1LL * 24LL * 60LL * 60LL; 1364 return (t); 1365 } 1366 1367 /* 1368 * Get file times from NTFS_A_NAME attribute. 1369 */ 1370 int 1371 ntfs_times( 1372 struct ntfsmount * ntmp, 1373 struct ntnode * ip, 1374 ntfs_times_t * tm) 1375 { 1376 struct ntvattr *vap; 1377 int error; 1378 1379 dprintf(("ntfs_times: ino: %llu...\n", 1380 (unsigned long long)ip->i_number)); 1381 1382 error = ntfs_ntget(ip); 1383 if (error) 1384 return (error); 1385 1386 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap); 1387 if (error) { 1388 ntfs_ntput(ip); 1389 return (error); 1390 } 1391 *tm = vap->va_a_name->n_times; 1392 ntfs_ntvattrrele(vap); 1393 ntfs_ntput(ip); 1394 1395 return (0); 1396 } 1397 1398 /* 1399 * Get file sizes from corresponding attribute. 1400 * 1401 * ntnode under fnode should be locked. 1402 */ 1403 int 1404 ntfs_filesize( 1405 struct ntfsmount * ntmp, 1406 struct fnode * fp, 1407 u_int64_t * size, 1408 u_int64_t * bytes) 1409 { 1410 struct ntvattr *vap; 1411 struct ntnode *ip = FTONT(fp); 1412 u_int64_t sz, bn; 1413 int error; 1414 1415 dprintf(("ntfs_filesize: ino: %llu\n", 1416 (unsigned long long)ip->i_number)); 1417 1418 error = ntfs_ntvattrget(ntmp, ip, 1419 fp->f_attrtype, fp->f_attrname, 0, &vap); 1420 if (error) 1421 return (error); 1422 1423 bn = vap->va_allocated; 1424 sz = vap->va_datalen; 1425 1426 dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n", 1427 (u_int32_t) sz, (u_int32_t) bn)); 1428 1429 if (size) 1430 *size = sz; 1431 if (bytes) 1432 *bytes = bn; 1433 1434 ntfs_ntvattrrele(vap); 1435 1436 return (0); 1437 } 1438 1439 /* 1440 * This is one of write routine. 1441 */ 1442 int 1443 ntfs_writeattr_plain( 1444 struct ntfsmount * ntmp, 1445 struct ntnode * ip, 1446 u_int32_t attrnum, 1447 char *attrname, 1448 off_t roff, 1449 size_t rsize, 1450 void *rdata, 1451 size_t * initp, 1452 struct uio *uio) 1453 { 1454 size_t init; 1455 int error = 0; 1456 off_t off = roff, left = rsize, towrite; 1457 void * data = rdata; 1458 struct ntvattr *vap; 1459 *initp = 0; 1460 1461 while (left) { 1462 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 1463 ntfs_btocn(off), &vap); 1464 if (error) 1465 return (error); 1466 towrite = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off); 1467 ddprintf(("ntfs_writeattr_plain: o: %qd, s: %qd (%qu - %qu)\n", 1468 (long long) off, (long long) towrite, 1469 (long long) vap->va_vcnstart, 1470 (long long) vap->va_vcnend)); 1471 error = ntfs_writentvattr_plain(ntmp, ip, vap, 1472 off - ntfs_cntob(vap->va_vcnstart), 1473 towrite, data, &init, uio); 1474 if (error) { 1475 dprintf(("ntfs_writeattr_plain: " 1476 "ntfs_writentvattr_plain failed: o: %qd, s: %qd\n", 1477 (long long) off, (long long) towrite)); 1478 dprintf(("ntfs_writeattr_plain: attrib: %qu - %qu\n", 1479 (long long) vap->va_vcnstart, 1480 (long long) vap->va_vcnend)); 1481 ntfs_ntvattrrele(vap); 1482 break; 1483 } 1484 ntfs_ntvattrrele(vap); 1485 left -= towrite; 1486 off += towrite; 1487 data = (char *)data + towrite; 1488 *initp += init; 1489 } 1490 1491 return (error); 1492 } 1493 1494 /* 1495 * This is one of write routine. 1496 * 1497 * ntnode should be locked. 1498 */ 1499 int 1500 ntfs_writentvattr_plain( 1501 struct ntfsmount * ntmp, 1502 struct ntnode * ip, 1503 struct ntvattr * vap, 1504 off_t roff, 1505 size_t rsize, 1506 void *rdata, 1507 size_t * initp, 1508 struct uio *uio) 1509 { 1510 int error = 0; 1511 off_t off; 1512 int cnt; 1513 cn_t ccn, ccl, cn, left, cl; 1514 void * data = rdata; 1515 struct buf *bp; 1516 size_t tocopy; 1517 1518 *initp = 0; 1519 1520 if ((vap->va_flag & NTFS_AF_INRUN) == 0) { 1521 dprintf(("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n")); 1522 return ENOTTY; 1523 } 1524 1525 ddprintf(("ntfs_writentvattr_plain: data in run: %lu chains\n", 1526 vap->va_vruncnt)); 1527 1528 off = roff; 1529 left = rsize; 1530 ccl = 0; 1531 ccn = 0; 1532 cnt = 0; 1533 for (; left && (cnt < vap->va_vruncnt); cnt++) { 1534 ccn = vap->va_vruncn[cnt]; 1535 ccl = vap->va_vruncl[cnt]; 1536 1537 ddprintf(("ntfs_writentvattr_plain: " 1538 "left %qu, cn: 0x%qx, cl: %qu, off: %qd\n", 1539 (long long) left, (long long) ccn, 1540 (long long) ccl, (long long) off)); 1541 1542 if (ntfs_cntob(ccl) < off) { 1543 off -= ntfs_cntob(ccl); 1544 cnt++; 1545 continue; 1546 } 1547 if (!ccn && ip->i_number != NTFS_BOOTINO) 1548 continue; /* XXX */ 1549 1550 ccl -= ntfs_btocn(off); 1551 cn = ccn + ntfs_btocn(off); 1552 off = ntfs_btocnoff(off); 1553 1554 while (left && ccl) { 1555 /* 1556 * Always read and write single clusters at a time - 1557 * we need to avoid requesting differently-sized 1558 * blocks at the same disk offsets to avoid 1559 * confusing the buffer cache. 1560 */ 1561 tocopy = MIN(left, ntfs_cntob(1) - off); 1562 cl = ntfs_btocl(tocopy + off); 1563 KASSERT(cl == 1 && tocopy <= ntfs_cntob(1)); 1564 ddprintf(("ntfs_writentvattr_plain: write: " 1565 "cn: 0x%qx cl: %qu, off: %qd len: %qu, left: %qu\n", 1566 (long long) cn, (long long) cl, 1567 (long long) off, (long long) tocopy, 1568 (long long) left)); 1569 if ((off == 0) && (tocopy == ntfs_cntob(cl))) 1570 { 1571 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn), 1572 ntfs_cntob(cl), 0, 0); 1573 clrbuf(bp); 1574 } else { 1575 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn), 1576 ntfs_cntob(cl), NOCRED, &bp); 1577 if (error) { 1578 brelse(bp, 0); 1579 return (error); 1580 } 1581 } 1582 if (uio) 1583 uiomove((char *)bp->b_data + off, tocopy, uio); 1584 else 1585 memcpy((char *)bp->b_data + off, data, tocopy); 1586 bawrite(bp); 1587 data = (char *)data + tocopy; 1588 *initp += tocopy; 1589 off = 0; 1590 left -= tocopy; 1591 cn += cl; 1592 ccl -= cl; 1593 } 1594 } 1595 1596 if (left) { 1597 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n"); 1598 error = EINVAL; 1599 } 1600 1601 return (error); 1602 } 1603 1604 /* 1605 * This is one of read routines. 1606 * 1607 * ntnode should be locked. 1608 */ 1609 int 1610 ntfs_readntvattr_plain( 1611 struct ntfsmount * ntmp, 1612 struct ntnode * ip, 1613 struct ntvattr * vap, 1614 off_t roff, 1615 size_t rsize, 1616 void *rdata, 1617 size_t * initp, 1618 struct uio *uio) 1619 { 1620 int error = 0; 1621 off_t off; 1622 1623 *initp = 0; 1624 if (vap->va_flag & NTFS_AF_INRUN) { 1625 int cnt; 1626 cn_t ccn, ccl, cn, left, cl; 1627 void * data = rdata; 1628 struct buf *bp; 1629 size_t tocopy; 1630 1631 ddprintf(("ntfs_readntvattr_plain: data in run: %lu chains\n", 1632 vap->va_vruncnt)); 1633 1634 off = roff; 1635 left = rsize; 1636 ccl = 0; 1637 ccn = 0; 1638 cnt = 0; 1639 while (left && (cnt < vap->va_vruncnt)) { 1640 ccn = vap->va_vruncn[cnt]; 1641 ccl = vap->va_vruncl[cnt]; 1642 1643 ddprintf(("ntfs_readntvattr_plain: " 1644 "left %qu, cn: 0x%qx, cl: %qu, off: %qd\n", 1645 (long long) left, (long long) ccn, 1646 (long long) ccl, (long long) off)); 1647 1648 if (ntfs_cntob(ccl) < off) { 1649 off -= ntfs_cntob(ccl); 1650 cnt++; 1651 continue; 1652 } 1653 if (ccn || ip->i_number == NTFS_BOOTINO) { 1654 ccl -= ntfs_btocn(off); 1655 cn = ccn + ntfs_btocn(off); 1656 off = ntfs_btocnoff(off); 1657 1658 while (left && ccl) { 1659 /* 1660 * Always read single clusters at a 1661 * time - we need to avoid reading 1662 * differently-sized blocks at the 1663 * same disk offsets to avoid 1664 * confusing the buffer cache. 1665 */ 1666 tocopy = MIN(left, 1667 ntfs_cntob(1) - off); 1668 cl = ntfs_btocl(tocopy + off); 1669 KASSERT(cl == 1 && 1670 tocopy <= ntfs_cntob(1)); 1671 1672 ddprintf(("ntfs_readntvattr_plain: " 1673 "read: cn: 0x%qx cl: %qu, " 1674 "off: %qd len: %qu, left: %qu\n", 1675 (long long) cn, 1676 (long long) cl, 1677 (long long) off, 1678 (long long) tocopy, 1679 (long long) left)); 1680 error = bread(ntmp->ntm_devvp, 1681 ntfs_cntobn(cn), 1682 ntfs_cntob(cl), 1683 NOCRED, &bp); 1684 if (error) { 1685 brelse(bp, 0); 1686 return (error); 1687 } 1688 if (uio) { 1689 uiomove((char *)bp->b_data + off, 1690 tocopy, uio); 1691 } else { 1692 memcpy(data, (char *)bp->b_data + off, 1693 tocopy); 1694 } 1695 brelse(bp, 0); 1696 data = (char *)data + tocopy; 1697 *initp += tocopy; 1698 off = 0; 1699 left -= tocopy; 1700 cn += cl; 1701 ccl -= cl; 1702 } 1703 } else { 1704 tocopy = MIN(left, ntfs_cntob(ccl) - off); 1705 ddprintf(("ntfs_readntvattr_plain: " 1706 "hole: ccn: 0x%qx ccl: %qu, off: %qd, " 1707 " len: %qu, left: %qu\n", 1708 (long long) ccn, (long long) ccl, 1709 (long long) off, (long long) tocopy, 1710 (long long) left)); 1711 left -= tocopy; 1712 off = 0; 1713 if (uio) { 1714 char vbuf[] = ""; 1715 size_t remains = tocopy; 1716 for(; remains; remains--) 1717 uiomove(vbuf, 1, uio); 1718 } else 1719 bzero(data, tocopy); 1720 data = (char *)data + tocopy; 1721 } 1722 cnt++; 1723 } 1724 if (left) { 1725 printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n"); 1726 error = E2BIG; 1727 } 1728 } else { 1729 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n")); 1730 if (uio) 1731 uiomove((char *)vap->va_datap + roff, rsize, uio); 1732 else 1733 memcpy(rdata, (char *)vap->va_datap + roff, rsize); 1734 *initp += rsize; 1735 } 1736 1737 return (error); 1738 } 1739 1740 /* 1741 * This is one of read routines. 1742 */ 1743 int 1744 ntfs_readattr_plain( 1745 struct ntfsmount * ntmp, 1746 struct ntnode * ip, 1747 u_int32_t attrnum, 1748 const char *attrname, 1749 off_t roff, 1750 size_t rsize, 1751 void *rdata, 1752 size_t * initp, 1753 struct uio *uio) 1754 { 1755 size_t init; 1756 int error = 0; 1757 off_t off = roff, left = rsize, toread; 1758 void * data = rdata; 1759 struct ntvattr *vap; 1760 *initp = 0; 1761 1762 while (left) { 1763 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 1764 ntfs_btocn(off), &vap); 1765 if (error) 1766 return (error); 1767 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off); 1768 ddprintf(("ntfs_readattr_plain: o: %qd, s: %qd (%qu - %qu)\n", 1769 (long long) off, (long long) toread, 1770 (long long) vap->va_vcnstart, 1771 (long long) vap->va_vcnend)); 1772 error = ntfs_readntvattr_plain(ntmp, ip, vap, 1773 off - ntfs_cntob(vap->va_vcnstart), 1774 toread, data, &init, uio); 1775 if (error) { 1776 printf("ntfs_readattr_plain: " 1777 "ntfs_readntvattr_plain failed: o: %qd, s: %qd\n", 1778 (long long) off, (long long) toread); 1779 printf("ntfs_readattr_plain: attrib: %qu - %qu\n", 1780 (long long) vap->va_vcnstart, 1781 (long long) vap->va_vcnend); 1782 ntfs_ntvattrrele(vap); 1783 break; 1784 } 1785 ntfs_ntvattrrele(vap); 1786 left -= toread; 1787 off += toread; 1788 data = (char *)data + toread; 1789 *initp += init; 1790 } 1791 1792 return (error); 1793 } 1794 1795 /* 1796 * This is one of read routines. 1797 */ 1798 int 1799 ntfs_readattr( 1800 struct ntfsmount * ntmp, 1801 struct ntnode * ip, 1802 u_int32_t attrnum, 1803 const char *attrname, 1804 off_t roff, 1805 size_t rsize, 1806 void *rdata, 1807 struct uio *uio) 1808 { 1809 int error = 0; 1810 struct ntvattr *vap; 1811 size_t init; 1812 1813 ddprintf(("ntfs_readattr: reading %llu: 0x%x, from %qd size %qu" 1814 " bytes\n", (unsigned long long)ip->i_number, attrnum, 1815 (long long)roff, (long long)rsize)); 1816 1817 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap); 1818 if (error) 1819 return (error); 1820 1821 if ((roff > vap->va_datalen) || 1822 (roff + rsize > vap->va_datalen)) { 1823 printf("ntfs_readattr: offset too big: %qd (%qd) > %qu\n", 1824 (long long) roff, (long long) (roff + rsize), 1825 (long long) vap->va_datalen); 1826 ntfs_ntvattrrele(vap); 1827 return (E2BIG); 1828 } 1829 if (vap->va_compression && vap->va_compressalg) { 1830 u_int8_t *cup; 1831 u_int8_t *uup; 1832 off_t off = roff, left = rsize, tocopy; 1833 void * data = rdata; 1834 cn_t cn; 1835 1836 ddprintf(("ntfs_ntreadattr: compression: %d\n", 1837 vap->va_compressalg)); 1838 1839 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL), 1840 M_NTFSDECOMP, M_WAITOK); 1841 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL), 1842 M_NTFSDECOMP, M_WAITOK); 1843 1844 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1)); 1845 off = roff - ntfs_cntob(cn); 1846 1847 while (left) { 1848 error = ntfs_readattr_plain(ntmp, ip, attrnum, 1849 attrname, ntfs_cntob(cn), 1850 ntfs_cntob(NTFS_COMPUNIT_CL), 1851 cup, &init, NULL); 1852 if (error) 1853 break; 1854 1855 tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off); 1856 1857 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) { 1858 if (uio) 1859 uiomove(cup + off, tocopy, uio); 1860 else 1861 memcpy(data, cup + off, tocopy); 1862 } else if (init == 0) { 1863 if (uio) { 1864 char vbuf[] = ""; 1865 size_t remains = tocopy; 1866 for(; remains; remains--) 1867 uiomove(vbuf, 1, uio); 1868 } 1869 else 1870 bzero(data, tocopy); 1871 } else { 1872 error = ntfs_uncompunit(ntmp, uup, cup); 1873 if (error) 1874 break; 1875 if (uio) 1876 uiomove(uup + off, tocopy, uio); 1877 else 1878 memcpy(data, uup + off, tocopy); 1879 } 1880 1881 left -= tocopy; 1882 data = (char *)data + tocopy; 1883 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL); 1884 cn += NTFS_COMPUNIT_CL; 1885 } 1886 1887 FREE(uup, M_NTFSDECOMP); 1888 FREE(cup, M_NTFSDECOMP); 1889 } else 1890 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname, 1891 roff, rsize, rdata, &init, uio); 1892 ntfs_ntvattrrele(vap); 1893 return (error); 1894 } 1895 1896 #if UNUSED_CODE 1897 int 1898 ntfs_parserun( 1899 cn_t * cn, 1900 cn_t * cl, 1901 u_int8_t * run, 1902 u_long len, 1903 u_long *off) 1904 { 1905 u_int8_t sz; 1906 int i; 1907 1908 if (NULL == run) { 1909 printf("ntfs_parsetun: run == NULL\n"); 1910 return (EINVAL); 1911 } 1912 sz = run[(*off)++]; 1913 if (0 == sz) { 1914 printf("ntfs_parserun: trying to go out of run\n"); 1915 return (E2BIG); 1916 } 1917 *cl = 0; 1918 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) { 1919 printf("ntfs_parserun: " 1920 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n", 1921 sz, len, *off); 1922 return (EINVAL); 1923 } 1924 for (i = 0; i < (sz & 0xF); i++) 1925 *cl += (u_int32_t) run[(*off)++] << (i << 3); 1926 1927 sz >>= 4; 1928 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) { 1929 printf("ntfs_parserun: " 1930 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n", 1931 sz, len, *off); 1932 return (EINVAL); 1933 } 1934 for (i = 0; i < (sz & 0xF); i++) 1935 *cn += (u_int32_t) run[(*off)++] << (i << 3); 1936 1937 return (0); 1938 } 1939 #endif 1940 1941 /* 1942 * Process fixup routine on given buffer. 1943 */ 1944 int 1945 ntfs_procfixups( 1946 struct ntfsmount * ntmp, 1947 u_int32_t magic, 1948 void *xbufv, 1949 size_t len) 1950 { 1951 char *xbuf = xbufv; 1952 struct fixuphdr *fhp = (struct fixuphdr *) xbuf; 1953 int i; 1954 u_int16_t fixup; 1955 u_int16_t *fxp; 1956 u_int16_t *cfxp; 1957 1958 if (fhp->fh_magic != magic) { 1959 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n", 1960 fhp->fh_magic, magic); 1961 return (EINVAL); 1962 } 1963 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) { 1964 printf("ntfs_procfixups: " 1965 "bad fixups number: %d for %ld bytes block\n", 1966 fhp->fh_fnum, (long)len); /* XXX printf kludge */ 1967 return (EINVAL); 1968 } 1969 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) { 1970 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff); 1971 return (EINVAL); 1972 } 1973 fxp = (u_int16_t *) (xbuf + fhp->fh_foff); 1974 cfxp = (u_int16_t *) (xbuf + ntmp->ntm_bps - 2); 1975 fixup = *fxp++; 1976 for (i = 1; i < fhp->fh_fnum; i++, fxp++) { 1977 if (*cfxp != fixup) { 1978 printf("ntfs_procfixups: fixup %d doesn't match\n", i); 1979 return (EINVAL); 1980 } 1981 *cfxp = *fxp; 1982 cfxp = (u_int16_t *)((char *)cfxp + ntmp->ntm_bps); 1983 } 1984 return (0); 1985 } 1986 1987 #if UNUSED_CODE 1988 int 1989 ntfs_runtocn( 1990 cn_t * cn, 1991 struct ntfsmount * ntmp, 1992 u_int8_t * run, 1993 u_long len, 1994 cn_t vcn) 1995 { 1996 cn_t ccn = 0; 1997 cn_t ccl = 0; 1998 u_long off = 0; 1999 int error = 0; 2000 2001 #ifdef NTFS_DEBUG 2002 int i; 2003 printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n", 2004 run, len, (u_long) vcn); 2005 printf("ntfs_runtocn: run: "); 2006 for (i = 0; i < len; i++) 2007 printf("0x%02x ", run[i]); 2008 printf("\n"); 2009 #endif 2010 2011 if (NULL == run) { 2012 printf("ntfs_runtocn: run == NULL\n"); 2013 return (EINVAL); 2014 } 2015 do { 2016 if (run[off] == 0) { 2017 printf("ntfs_runtocn: vcn too big\n"); 2018 return (E2BIG); 2019 } 2020 vcn -= ccl; 2021 error = ntfs_parserun(&ccn, &ccl, run, len, &off); 2022 if (error) { 2023 printf("ntfs_runtocn: ntfs_parserun failed\n"); 2024 return (error); 2025 } 2026 } while (ccl <= vcn); 2027 *cn = ccn + vcn; 2028 return (0); 2029 } 2030 #endif 2031 2032 /* 2033 * this initializes toupper table & dependant variables to be ready for 2034 * later work 2035 */ 2036 void 2037 ntfs_toupper_init() 2038 { 2039 ntfs_toupper_tab = (wchar *) NULL; 2040 mutex_init(&ntfs_toupper_lock, MUTEX_DEFAULT, IPL_NONE); 2041 ntfs_toupper_usecount = 0; 2042 } 2043 2044 /* 2045 * if the ntfs_toupper_tab[] is filled already, just raise use count; 2046 * otherwise read the data from the filesystem we are currently mounting 2047 */ 2048 int 2049 ntfs_toupper_use(mp, ntmp) 2050 struct mount *mp; 2051 struct ntfsmount *ntmp; 2052 { 2053 int error = 0; 2054 struct vnode *vp; 2055 2056 /* get exclusive access */ 2057 mutex_enter(&ntfs_toupper_lock); 2058 2059 /* only read the translation data from a file if it hasn't been 2060 * read already */ 2061 if (ntfs_toupper_tab) 2062 goto out; 2063 2064 /* 2065 * Read in Unicode lowercase -> uppercase translation file. 2066 * XXX for now, just the first 256 entries are used anyway, 2067 * so don't bother reading more 2068 */ 2069 MALLOC(ntfs_toupper_tab, wchar *, 256 * 256 * sizeof(wchar), 2070 M_NTFSRDATA, M_WAITOK); 2071 2072 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp))) 2073 goto out; 2074 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 2075 0, 256*256*sizeof(wchar), (char *) ntfs_toupper_tab, 2076 NULL); 2077 vput(vp); 2078 2079 out: 2080 ntfs_toupper_usecount++; 2081 mutex_exit(&ntfs_toupper_lock); 2082 return (error); 2083 } 2084 2085 /* 2086 * lower the use count and if it reaches zero, free the memory 2087 * tied by toupper table 2088 */ 2089 void 2090 ntfs_toupper_unuse() 2091 { 2092 /* get exclusive access */ 2093 mutex_enter(&ntfs_toupper_lock); 2094 2095 ntfs_toupper_usecount--; 2096 if (ntfs_toupper_usecount == 0) { 2097 FREE(ntfs_toupper_tab, M_NTFSRDATA); 2098 ntfs_toupper_tab = NULL; 2099 } 2100 #ifdef DIAGNOSTIC 2101 else if (ntfs_toupper_usecount < 0) { 2102 panic("ntfs_toupper_unuse(): use count negative: %d", 2103 ntfs_toupper_usecount); 2104 } 2105 #endif 2106 2107 /* release the lock */ 2108 mutex_exit(&ntfs_toupper_lock); 2109 } 2110
Indexes created Tue Sep 30 11:09:46 GMT 2025