ntfs_subr.c revision 1.19
1 /* $NetBSD: ntfs_subr.c,v 1.19 2005/08/30 19:01:29 xtraeme 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 1.19 2005/08/30 19:01:29 xtraeme 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 #if defined(__FreeBSD__) 46 #include <machine/clock.h> 47 #endif 48 49 #include <miscfs/specfs/specdev.h> 50 51 /* #define NTFS_DEBUG 1 */ 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 #if defined(NTFS_DEBUG) 61 int ntfs_debug = NTFS_DEBUG; 62 #endif 63 64 MALLOC_DEFINE(M_NTFSNTVATTR, "NTFS vattr", "NTFS file attribute information"); 65 MALLOC_DEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data"); 66 MALLOC_DEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage"); 67 MALLOC_DEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary"); 68 69 /* Local struct used in ntfs_ntlookupfile() */ 70 struct ntfs_lookup_ctx { 71 u_int32_t aoff; 72 u_int32_t rdsize; 73 cn_t cn; 74 struct ntfs_lookup_ctx *prev; 75 }; 76 77 static int ntfs_ntlookupattr(struct ntfsmount *, const char *, int, 78 int *, char **); 79 static int ntfs_findvattr(struct ntfsmount *, struct ntnode *, 80 struct ntvattr **, struct ntvattr **, u_int32_t, const char *, 81 size_t, cn_t); 82 static int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t, 83 const char *, size_t); 84 static int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t, 85 const char *, size_t); 86 87 /* table for mapping Unicode chars into uppercase; it's filled upon first 88 * ntfs mount, freed upon last ntfs umount */ 89 static wchar *ntfs_toupper_tab; 90 #define NTFS_U28(ch) ((((ch) & 0xE0) == 0) ? '_' : (ch) & 0xFF) 91 #define NTFS_TOUPPER(ch) (ntfs_toupper_tab[(unsigned char)(ch)]) 92 static struct lock ntfs_toupper_lock; 93 static signed int ntfs_toupper_usecount; 94 95 /* support macro for ntfs_ntvattrget() */ 96 #define NTFS_AALPCMP(aalp,type,name,namelen) ( \ 97 (aalp->al_type == type) && (aalp->al_namelen == namelen) && \ 98 !ntfs_uastrcmp(ntmp, aalp->al_name,aalp->al_namelen,name,namelen) ) 99 100 /* 101 * 102 */ 103 int 104 ntfs_ntvattrrele(vap) 105 struct ntvattr * vap; 106 { 107 dprintf(("ntfs_ntvattrrele: ino: %d, type: 0x%x\n", 108 vap->va_ip->i_number, vap->va_type)); 109 110 ntfs_ntrele(vap->va_ip); 111 112 return (0); 113 } 114 115 /* 116 * find the attribute in the ntnode 117 */ 118 static int 119 ntfs_findvattr(ntmp, ip, lvapp, vapp, type, name, namelen, vcn) 120 struct ntfsmount *ntmp; 121 struct ntnode *ip; 122 struct ntvattr **lvapp, **vapp; 123 u_int32_t type; 124 const char *name; 125 size_t namelen; 126 cn_t vcn; 127 { 128 int error; 129 struct ntvattr *vap; 130 131 if((ip->i_flag & IN_LOADED) == 0) { 132 dprintf(("ntfs_findvattr: node not loaded, ino: %d\n", 133 ip->i_number)); 134 error = ntfs_loadntnode(ntmp,ip); 135 if (error) { 136 printf("ntfs_findvattr: FAILED TO LOAD INO: %llu\n", 137 (unsigned long long)ip->i_number); 138 return (error); 139 } 140 } 141 142 *lvapp = NULL; 143 *vapp = NULL; 144 for (vap = ip->i_valist.lh_first; vap; vap = vap->va_list.le_next) { 145 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %qu - %qu\n", \ 146 vap->va_type, (long long) vap->va_vcnstart, \ 147 (long long) vap->va_vcnend)); 148 if ((vap->va_type == type) && 149 (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) && 150 (vap->va_namelen == namelen) && 151 (strncmp(name, vap->va_name, namelen) == 0)) { 152 *vapp = vap; 153 ntfs_ntref(vap->va_ip); 154 return (0); 155 } 156 if (vap->va_type == NTFS_A_ATTRLIST) 157 *lvapp = vap; 158 } 159 160 return (-1); 161 } 162 163 /* 164 * Search attribute specified in ntnode (load ntnode if necessary). 165 * If not found but ATTR_A_ATTRLIST present, read it in and search through. 166 * VOP_VGET node needed, and lookup through its ntnode (load if nessesary). 167 * 168 * ntnode should be locked 169 */ 170 int 171 ntfs_ntvattrget( 172 struct ntfsmount * ntmp, 173 struct ntnode * ip, 174 u_int32_t type, 175 const char *name, 176 cn_t vcn, 177 struct ntvattr ** vapp) 178 { 179 struct ntvattr *lvap = NULL; 180 struct attr_attrlist *aalp; 181 struct attr_attrlist *nextaalp; 182 struct vnode *newvp; 183 struct ntnode *newip; 184 caddr_t alpool; 185 size_t namelen, len; 186 int error; 187 188 *vapp = NULL; 189 190 if (name) { 191 dprintf(("ntfs_ntvattrget: " \ 192 "ino: %d, type: 0x%x, name: %s, vcn: %qu\n", \ 193 ip->i_number, type, name, (long long) vcn)); 194 namelen = strlen(name); 195 } else { 196 dprintf(("ntfs_ntvattrget: " \ 197 "ino: %d, type: 0x%x, vcn: %qu\n", \ 198 ip->i_number, type, (long long) vcn)); 199 name = ""; 200 namelen = 0; 201 } 202 203 error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn); 204 if (error >= 0) 205 return (error); 206 207 if (!lvap) { 208 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \ 209 "ino: %d, type: 0x%x, name: %s, vcn: %qu\n", \ 210 ip->i_number, type, name, (long long) vcn)); 211 return (ENOENT); 212 } 213 /* Scan $ATTRIBUTE_LIST for requested attribute */ 214 len = lvap->va_datalen; 215 alpool = (caddr_t) malloc(len, M_TEMP, M_WAITOK); 216 error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len, 217 NULL); 218 if (error) 219 goto out; 220 221 aalp = (struct attr_attrlist *) alpool; 222 nextaalp = NULL; 223 224 for(; len > 0; aalp = nextaalp) { 225 dprintf(("ntfs_ntvattrget: " \ 226 "attrlist: ino: %d, attr: 0x%x, vcn: %qu\n", \ 227 aalp->al_inumber, aalp->al_type, \ 228 (long long) aalp->al_vcnstart)); 229 230 if (len > aalp->reclen) { 231 nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *); 232 } else { 233 nextaalp = NULL; 234 } 235 len -= aalp->reclen; 236 237 if (!NTFS_AALPCMP(aalp, type, name, namelen) || 238 (nextaalp && (nextaalp->al_vcnstart <= vcn) && 239 NTFS_AALPCMP(nextaalp, type, name, namelen))) 240 continue; 241 242 dprintf(("ntfs_ntvattrget: attribute in ino: %d\n", 243 aalp->al_inumber)); 244 245 /* this is not a main record, so we can't use just plain 246 vget() */ 247 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber, 248 NTFS_A_DATA, NULL, LK_EXCLUSIVE, 249 VG_EXT, curproc, &newvp); 250 if (error) { 251 printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n", 252 aalp->al_inumber); 253 goto out; 254 } 255 newip = VTONT(newvp); 256 /* XXX have to lock ntnode */ 257 error = ntfs_findvattr(ntmp, newip, &lvap, vapp, 258 type, name, namelen, vcn); 259 vput(newvp); 260 if (error == 0) 261 goto out; 262 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n"); 263 break; 264 } 265 error = ENOENT; 266 267 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \ 268 "ino: %d, type: 0x%x, name: %.*s, vcn: %qu\n", \ 269 ip->i_number, type, (int) namelen, name, (long long) vcn)); 270 out: 271 free(alpool, M_TEMP); 272 return (error); 273 } 274 275 /* 276 * Read ntnode from disk, make ntvattr list. 277 * 278 * ntnode should be locked 279 */ 280 int 281 ntfs_loadntnode( 282 struct ntfsmount * ntmp, 283 struct ntnode * ip) 284 { 285 struct filerec *mfrp; 286 daddr_t bn; 287 int error,off; 288 struct attr *ap; 289 struct ntvattr *nvap; 290 291 dprintf(("ntfs_loadntnode: loading ino: %d\n",ip->i_number)); 292 293 mfrp = (struct filerec *) malloc(ntfs_bntob(ntmp->ntm_bpmftrec), 294 M_TEMP, M_WAITOK); 295 296 if (ip->i_number < NTFS_SYSNODESNUM) { 297 struct buf *bp; 298 299 dprintf(("ntfs_loadntnode: read system node\n")); 300 301 bn = ntfs_cntobn(ntmp->ntm_mftcn) + 302 ntmp->ntm_bpmftrec * ip->i_number; 303 304 error = bread(ntmp->ntm_devvp, 305 bn, ntfs_bntob(ntmp->ntm_bpmftrec), 306 NOCRED, &bp); 307 if (error) { 308 printf("ntfs_loadntnode: BREAD FAILED\n"); 309 brelse(bp); 310 goto out; 311 } 312 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec)); 313 bqrelse(bp); 314 } else { 315 struct vnode *vp; 316 317 vp = ntmp->ntm_sysvn[NTFS_MFTINO]; 318 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 319 ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec), 320 ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL); 321 if (error) { 322 printf("ntfs_loadntnode: ntfs_readattr failed\n"); 323 goto out; 324 } 325 } 326 327 /* Check if magic and fixups are correct */ 328 error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp, 329 ntfs_bntob(ntmp->ntm_bpmftrec)); 330 if (error) { 331 printf("ntfs_loadntnode: BAD MFT RECORD %d\n", 332 (u_int32_t) ip->i_number); 333 goto out; 334 } 335 336 dprintf(("ntfs_loadntnode: load attrs for ino: %d\n",ip->i_number)); 337 off = mfrp->fr_attroff; 338 ap = (struct attr *) ((caddr_t)mfrp + off); 339 340 LIST_INIT(&ip->i_valist); 341 342 while (ap->a_hdr.a_type != -1) { 343 error = ntfs_attrtontvattr(ntmp, &nvap, ap); 344 if (error) 345 break; 346 nvap->va_ip = ip; 347 348 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list); 349 350 off += ap->a_hdr.reclen; 351 ap = (struct attr *) ((caddr_t)mfrp + off); 352 } 353 if (error) { 354 printf("ntfs_loadntnode: failed to load attr ino: %llu\n", 355 (unsigned long long)ip->i_number); 356 goto out; 357 } 358 359 ip->i_mainrec = mfrp->fr_mainrec; 360 ip->i_nlink = mfrp->fr_nlink; 361 ip->i_frflag = mfrp->fr_flags; 362 363 ip->i_flag |= IN_LOADED; 364 365 out: 366 free(mfrp, M_TEMP); 367 return (error); 368 } 369 370 /* 371 * Routine locks ntnode and increase usecount, just opposite of 372 * ntfs_ntput(). 373 */ 374 int 375 ntfs_ntget(ip) 376 struct ntnode *ip; 377 { 378 dprintf(("ntfs_ntget: get ntnode %d: %p, usecount: %d\n", 379 ip->i_number, ip, ip->i_usecount)); 380 381 simple_lock(&ip->i_interlock); 382 ip->i_usecount++; 383 lockmgr(&ip->i_lock, LK_EXCLUSIVE | LK_INTERLOCK, &ip->i_interlock); 384 385 return 0; 386 } 387 388 /* 389 * Routine search ntnode in hash, if found: lock, inc usecount and return. 390 * If not in hash allocate structure for ntnode, prefill it, lock, 391 * inc count and return. 392 * 393 * ntnode returned locked 394 */ 395 int 396 ntfs_ntlookup( 397 struct ntfsmount * ntmp, 398 ino_t ino, 399 struct ntnode ** ipp) 400 { 401 struct ntnode *ip; 402 403 dprintf(("ntfs_ntlookup: looking for ntnode %d\n", ino)); 404 405 do { 406 if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) { 407 ntfs_ntget(ip); 408 dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n", 409 ino, ip, ip->i_usecount)); 410 *ipp = ip; 411 return (0); 412 } 413 } while (lockmgr(&ntfs_hashlock, LK_EXCLUSIVE | LK_SLEEPFAIL, NULL)); 414 415 MALLOC(ip, struct ntnode *, sizeof(struct ntnode), 416 M_NTFSNTNODE, M_WAITOK); 417 ddprintf(("ntfs_ntlookup: allocating ntnode: %d: %p\n", ino, ip)); 418 bzero(ip, sizeof(struct ntnode)); 419 420 /* Generic initialization */ 421 ip->i_devvp = ntmp->ntm_devvp; 422 ip->i_dev = ntmp->ntm_dev; 423 ip->i_number = ino; 424 ip->i_mp = ntmp; 425 426 LIST_INIT(&ip->i_fnlist); 427 428 /* init lock and lock the newborn ntnode */ 429 lockinit(&ip->i_lock, PINOD, "ntnode", 0, LK_EXCLUSIVE); 430 simple_lock_init(&ip->i_interlock); 431 ntfs_ntget(ip); 432 433 ntfs_nthashins(ip); 434 435 lockmgr(&ntfs_hashlock, LK_RELEASE, NULL); 436 437 *ipp = ip; 438 439 dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n", 440 ino, ip, ip->i_usecount)); 441 442 return (0); 443 } 444 445 /* 446 * Decrement usecount of ntnode and unlock it, if usecount reach zero, 447 * deallocate ntnode. 448 * 449 * ntnode should be locked on entry, and unlocked on return. 450 */ 451 void 452 ntfs_ntput(ip) 453 struct ntnode *ip; 454 { 455 struct ntvattr *vap; 456 457 dprintf(("ntfs_ntput: rele ntnode %d: %p, usecount: %d\n", 458 ip->i_number, ip, ip->i_usecount)); 459 460 simple_lock(&ip->i_interlock); 461 ip->i_usecount--; 462 463 #ifdef DIAGNOSTIC 464 if (ip->i_usecount < 0) { 465 panic("ntfs_ntput: ino: %llu usecount: %d ", 466 (unsigned long long)ip->i_number, ip->i_usecount); 467 } 468 #endif 469 470 lockmgr(&ip->i_lock, LK_RELEASE|LK_INTERLOCK, &ip->i_interlock); 471 472 if (ip->i_usecount == 0) { 473 dprintf(("ntfs_ntput: deallocating ntnode: %d\n", 474 ip->i_number)); 475 476 if (ip->i_fnlist.lh_first) 477 panic("ntfs_ntput: ntnode has fnodes"); 478 479 ntfs_nthashrem(ip); 480 481 while (ip->i_valist.lh_first != NULL) { 482 vap = ip->i_valist.lh_first; 483 LIST_REMOVE(vap,va_list); 484 ntfs_freentvattr(vap); 485 } 486 FREE(ip, M_NTFSNTNODE); 487 } 488 } 489 490 /* 491 * increment usecount of ntnode 492 */ 493 void 494 ntfs_ntref(ip) 495 struct ntnode *ip; 496 { 497 simple_lock(&ip->i_interlock); 498 ip->i_usecount++; 499 simple_unlock(&ip->i_interlock); 500 501 dprintf(("ntfs_ntref: ino %d, usecount: %d\n", 502 ip->i_number, ip->i_usecount)); 503 504 } 505 506 /* 507 * Decrement usecount of ntnode. 508 */ 509 void 510 ntfs_ntrele(ip) 511 struct ntnode *ip; 512 { 513 dprintf(("ntfs_ntrele: rele ntnode %d: %p, usecount: %d\n", 514 ip->i_number, ip, ip->i_usecount)); 515 516 simple_lock(&ip->i_interlock); 517 ip->i_usecount--; 518 519 if (ip->i_usecount < 0) 520 panic("ntfs_ntrele: ino: %llu usecount: %d ", 521 (unsigned long long)ip->i_number, ip->i_usecount); 522 simple_unlock(&ip->i_interlock); 523 } 524 525 /* 526 * Deallocate all memory allocated for ntvattr 527 */ 528 void 529 ntfs_freentvattr(vap) 530 struct ntvattr * vap; 531 { 532 if (vap->va_flag & NTFS_AF_INRUN) { 533 if (vap->va_vruncn) 534 free(vap->va_vruncn, M_NTFSRUN); 535 if (vap->va_vruncl) 536 free(vap->va_vruncl, M_NTFSRUN); 537 } else { 538 if (vap->va_datap) 539 free(vap->va_datap, M_NTFSRDATA); 540 } 541 FREE(vap, M_NTFSNTVATTR); 542 } 543 544 /* 545 * Convert disk image of attribute into ntvattr structure, 546 * runs are expanded also. 547 */ 548 int 549 ntfs_attrtontvattr( 550 struct ntfsmount * ntmp, 551 struct ntvattr ** rvapp, 552 struct attr * rap) 553 { 554 int error, i; 555 struct ntvattr *vap; 556 557 error = 0; 558 *rvapp = NULL; 559 560 MALLOC(vap, struct ntvattr *, sizeof(struct ntvattr), 561 M_NTFSNTVATTR, M_WAITOK); 562 bzero(vap, sizeof(struct ntvattr)); 563 vap->va_ip = NULL; 564 vap->va_flag = rap->a_hdr.a_flag; 565 vap->va_type = rap->a_hdr.a_type; 566 vap->va_compression = rap->a_hdr.a_compression; 567 vap->va_index = rap->a_hdr.a_index; 568 569 ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index)); 570 571 vap->va_namelen = rap->a_hdr.a_namelen; 572 if (rap->a_hdr.a_namelen) { 573 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff); 574 ddprintf((", name:[")); 575 for (i = 0; i < vap->va_namelen; i++) { 576 vap->va_name[i] = unp[i]; 577 ddprintf(("%c", vap->va_name[i])); 578 } 579 ddprintf(("]")); 580 } 581 if (vap->va_flag & NTFS_AF_INRUN) { 582 ddprintf((", nonres.")); 583 vap->va_datalen = rap->a_nr.a_datalen; 584 vap->va_allocated = rap->a_nr.a_allocated; 585 vap->va_vcnstart = rap->a_nr.a_vcnstart; 586 vap->va_vcnend = rap->a_nr.a_vcnend; 587 vap->va_compressalg = rap->a_nr.a_compressalg; 588 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl), 589 &(vap->va_vruncnt), 590 (caddr_t) rap + rap->a_nr.a_dataoff); 591 } else { 592 vap->va_compressalg = 0; 593 ddprintf((", res.")); 594 vap->va_datalen = rap->a_r.a_datalen; 595 vap->va_allocated = rap->a_r.a_datalen; 596 vap->va_vcnstart = 0; 597 vap->va_vcnend = ntfs_btocn(vap->va_allocated); 598 vap->va_datap = (caddr_t) malloc(vap->va_datalen, 599 M_NTFSRDATA, M_WAITOK); 600 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff, 601 rap->a_r.a_datalen); 602 } 603 ddprintf((", len: %qu", (long long)vap->va_datalen)); 604 605 if (error) 606 FREE(vap, M_NTFSNTVATTR); 607 else 608 *rvapp = vap; 609 610 ddprintf(("\n")); 611 612 return (error); 613 } 614 615 /* 616 * Expand run into more utilizable and more memory eating format. 617 */ 618 int 619 ntfs_runtovrun( 620 cn_t ** rcnp, 621 cn_t ** rclp, 622 u_long * rcntp, 623 u_int8_t * run) 624 { 625 u_int32_t off; 626 u_int32_t sz, i; 627 cn_t *cn; 628 cn_t *cl; 629 u_long cnt; 630 cn_t prev; 631 cn_t tmp; 632 633 off = 0; 634 cnt = 0; 635 i = 0; 636 while (run[off]) { 637 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1; 638 cnt++; 639 } 640 cn = (cn_t *) malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK); 641 cl = (cn_t *) malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK); 642 643 off = 0; 644 cnt = 0; 645 prev = 0; 646 while (run[off]) { 647 648 sz = run[off++]; 649 cl[cnt] = 0; 650 651 for (i = 0; i < (sz & 0xF); i++) 652 cl[cnt] += (u_int32_t) run[off++] << (i << 3); 653 654 sz >>= 4; 655 if (run[off + sz - 1] & 0x80) { 656 tmp = ((u_int64_t) - 1) << (sz << 3); 657 for (i = 0; i < sz; i++) 658 tmp |= (u_int64_t) run[off++] << (i << 3); 659 } else { 660 tmp = 0; 661 for (i = 0; i < sz; i++) 662 tmp |= (u_int64_t) run[off++] << (i << 3); 663 } 664 if (tmp) 665 prev = cn[cnt] = prev + tmp; 666 else 667 cn[cnt] = tmp; 668 669 cnt++; 670 } 671 *rcnp = cn; 672 *rclp = cl; 673 *rcntp = cnt; 674 return (0); 675 } 676 677 /* 678 * Compare unicode and ascii string case insens. 679 */ 680 static int 681 ntfs_uastricmp(ntmp, ustr, ustrlen, astr, astrlen) 682 struct ntfsmount *ntmp; 683 const wchar *ustr; 684 size_t ustrlen; 685 const char *astr; 686 size_t astrlen; 687 { 688 size_t i; 689 int res; 690 691 for (i = 0; i < ustrlen && astrlen > 0; i++) { 692 res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i]), 693 NTFS_TOUPPER((*ntmp->ntm_wget)(&astr, &astrlen)) ); 694 if (res) 695 return res; 696 } 697 698 if (i == ustrlen && astrlen == 0) 699 return 0; 700 else if (i == ustrlen) 701 return -1; 702 else 703 return 1; 704 } 705 706 /* 707 * Compare unicode and ascii string case sens. 708 */ 709 static int 710 ntfs_uastrcmp(ntmp, ustr, ustrlen, astr, astrlen) 711 struct ntfsmount *ntmp; 712 const wchar *ustr; 713 size_t ustrlen; 714 const char *astr; 715 size_t astrlen; 716 { 717 size_t i; 718 int res; 719 720 for (i = 0; (i < ustrlen) && astrlen > 0; i++) { 721 res = (*ntmp->ntm_wcmp)(ustr[i], 722 (*ntmp->ntm_wget)(&astr, &astrlen)); 723 if (res) 724 return res; 725 } 726 727 if (i == ustrlen && astrlen == 0) 728 return 0; 729 else if (i == ustrlen) 730 return -1; 731 else 732 return 1; 733 } 734 735 /* 736 * Search fnode in ntnode, if not found allocate and preinitialize. 737 * 738 * ntnode should be locked on entry. 739 */ 740 int 741 ntfs_fget( 742 struct ntfsmount *ntmp, 743 struct ntnode *ip, 744 int attrtype, 745 char *attrname, 746 struct fnode **fpp) 747 { 748 struct fnode *fp; 749 750 dprintf(("ntfs_fget: ino: %d, attrtype: 0x%x, attrname: %s\n", 751 ip->i_number,attrtype, attrname?attrname:"")); 752 *fpp = NULL; 753 for (fp = ip->i_fnlist.lh_first; fp != NULL; fp = fp->f_fnlist.le_next){ 754 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n", 755 fp->f_attrtype, fp->f_attrname?fp->f_attrname:"")); 756 757 if ((attrtype == fp->f_attrtype) && 758 ((!attrname && !fp->f_attrname) || 759 (attrname && fp->f_attrname && 760 !strcmp(attrname,fp->f_attrname)))){ 761 dprintf(("ntfs_fget: found existed: %p\n",fp)); 762 *fpp = fp; 763 } 764 } 765 766 if (*fpp) 767 return (0); 768 769 MALLOC(fp, struct fnode *, sizeof(struct fnode), M_NTFSFNODE, M_WAITOK); 770 bzero(fp, sizeof(struct fnode)); 771 dprintf(("ntfs_fget: allocating fnode: %p\n",fp)); 772 773 fp->f_ip = ip; 774 fp->f_attrname = attrname; 775 if (fp->f_attrname) fp->f_flag |= FN_AATTRNAME; 776 fp->f_attrtype = attrtype; 777 778 ntfs_ntref(ip); 779 780 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist); 781 782 *fpp = fp; 783 784 return (0); 785 } 786 787 /* 788 * Deallocate fnode, remove it from ntnode's fnode list. 789 * 790 * ntnode should be locked. 791 */ 792 void 793 ntfs_frele( 794 struct fnode *fp) 795 { 796 struct ntnode *ip = FTONT(fp); 797 798 dprintf(("ntfs_frele: fnode: %p for %d: %p\n", fp, ip->i_number, ip)); 799 800 dprintf(("ntfs_frele: deallocating fnode\n")); 801 LIST_REMOVE(fp,f_fnlist); 802 if (fp->f_flag & FN_AATTRNAME) 803 FREE(fp->f_attrname, M_TEMP); 804 if (fp->f_dirblbuf) 805 FREE(fp->f_dirblbuf, M_NTFSDIR); 806 FREE(fp, M_NTFSFNODE); 807 ntfs_ntrele(ip); 808 } 809 810 /* 811 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 812 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs. 813 * If $ATTR_TYPE not specified, ATTR_A_DATA assumed. 814 */ 815 static int 816 ntfs_ntlookupattr( 817 struct ntfsmount * ntmp, 818 const char * name, 819 int namelen, 820 int *attrtype, 821 char **attrname) 822 { 823 const char *sys; 824 size_t syslen, i; 825 struct ntvattrdef *adp; 826 827 if (namelen == 0) 828 return (0); 829 830 if (name[0] == '$') { 831 sys = name; 832 for (syslen = 0; syslen < namelen; syslen++) { 833 if(sys[syslen] == ':') { 834 name++; 835 namelen--; 836 break; 837 } 838 } 839 name += syslen; 840 namelen -= syslen; 841 842 adp = ntmp->ntm_ad; 843 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){ 844 if (syslen != adp->ad_namelen || 845 strncmp(sys, adp->ad_name, syslen) != 0) 846 continue; 847 848 *attrtype = adp->ad_type; 849 goto out; 850 } 851 return (ENOENT); 852 } 853 854 out: 855 if (namelen) { 856 *attrname = (char *) malloc(namelen, M_TEMP, M_WAITOK); 857 memcpy((*attrname), name, namelen); 858 (*attrname)[namelen] = '\0'; 859 *attrtype = NTFS_A_DATA; 860 } 861 862 return (0); 863 } 864 865 /* 866 * Lookup specified node for filename, matching cnp, 867 * return fnode filled. 868 */ 869 int 870 ntfs_ntlookupfile( 871 struct ntfsmount * ntmp, 872 struct vnode * vp, 873 struct componentname * cnp, 874 struct vnode ** vpp) 875 { 876 struct fnode *fp = VTOF(vp); 877 struct ntnode *ip = FTONT(fp); 878 struct ntvattr *vap; /* Root attribute */ 879 cn_t cn = 0; /* VCN in current attribute */ 880 caddr_t rdbuf; /* Buffer to read directory's blocks */ 881 u_int32_t blsize; 882 u_int32_t rdsize; /* Length of data to read from current block */ 883 struct attr_indexentry *iep; 884 int error, res, anamelen, fnamelen; 885 const char *fname,*aname; 886 u_int32_t aoff; 887 int attrtype = NTFS_A_DATA; 888 char *attrname = NULL; 889 struct fnode *nfp; 890 struct vnode *nvp; 891 enum vtype f_type; 892 int fullscan = 0; 893 struct ntfs_lookup_ctx *lookup_ctx = NULL, *tctx; 894 895 error = ntfs_ntget(ip); 896 if (error) 897 return (error); 898 899 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap); 900 if (error || (vap->va_flag & NTFS_AF_INRUN)) 901 return (ENOTDIR); 902 903 /* 904 * Divide file name into: foofilefoofilefoofile[:attrspec] 905 * Store like this: fname:fnamelen [aname:anamelen] 906 */ 907 fname = cnp->cn_nameptr; 908 aname = NULL; 909 anamelen = 0; 910 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++) 911 if(fname[fnamelen] == ':') { 912 aname = fname + fnamelen + 1; 913 anamelen = cnp->cn_namelen - fnamelen - 1; 914 dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n", 915 fname, fnamelen, aname, anamelen)); 916 break; 917 } 918 919 blsize = vap->va_a_iroot->ir_size; 920 dprintf(("ntfs_ntlookupfile: blksz: %d\n", blsize)); 921 922 rdbuf = (caddr_t) malloc(blsize, M_TEMP, M_WAITOK); 923 924 loop: 925 rdsize = vap->va_datalen; 926 dprintf(("ntfs_ntlookupfile: rdsz: %d\n", rdsize)); 927 928 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30", 929 0, rdsize, rdbuf, NULL); 930 if (error) 931 goto fail; 932 933 aoff = sizeof(struct attr_indexroot); 934 935 do { 936 iep = (struct attr_indexentry *) (rdbuf + aoff); 937 938 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff); 939 aoff += iep->reclen, 940 iep = (struct attr_indexentry *) (rdbuf + aoff)) 941 { 942 ddprintf(("scan: %d, %d\n", 943 (u_int32_t) iep->ie_number, 944 (u_int32_t) iep->ie_fnametype)); 945 946 /* check the name - the case-insensitive check 947 * has to come first, to break from this for loop 948 * if needed, so we can dive correctly */ 949 res = ntfs_uastricmp(ntmp, iep->ie_fname, 950 iep->ie_fnamelen, fname, fnamelen); 951 if (!fullscan) { 952 if (res > 0) break; 953 if (res < 0) continue; 954 } 955 956 if (iep->ie_fnametype == 0 || 957 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS)) 958 { 959 res = ntfs_uastrcmp(ntmp, iep->ie_fname, 960 iep->ie_fnamelen, fname, fnamelen); 961 if (res != 0 && !fullscan) continue; 962 } 963 964 /* if we perform full scan, the file does not match 965 * and this is subnode, dive */ 966 if (fullscan && res != 0) { 967 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) { 968 MALLOC(tctx, struct ntfs_lookup_ctx *, 969 sizeof(struct ntfs_lookup_ctx), 970 M_TEMP, M_WAITOK); 971 tctx->aoff = aoff + iep->reclen; 972 tctx->rdsize = rdsize; 973 tctx->cn = cn; 974 tctx->prev = lookup_ctx; 975 lookup_ctx = tctx; 976 break; 977 } else 978 continue; 979 } 980 981 if (aname) { 982 error = ntfs_ntlookupattr(ntmp, 983 aname, anamelen, 984 &attrtype, &attrname); 985 if (error) 986 goto fail; 987 } 988 989 /* Check if we've found ourselves */ 990 if ((iep->ie_number == ip->i_number) && 991 (attrtype == fp->f_attrtype) && 992 ((!attrname && !fp->f_attrname) || 993 (attrname && fp->f_attrname && 994 !strcmp(attrname, fp->f_attrname)))) 995 { 996 VREF(vp); 997 *vpp = vp; 998 error = 0; 999 goto fail; 1000 } 1001 1002 /* free the buffer returned by ntfs_ntlookupattr() */ 1003 if (attrname) { 1004 FREE(attrname, M_TEMP); 1005 attrname = NULL; 1006 } 1007 1008 /* vget node, but don't load it */ 1009 error = ntfs_vgetex(ntmp->ntm_mountp, 1010 iep->ie_number, attrtype, attrname, 1011 LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN, 1012 curproc, &nvp); 1013 if (error) 1014 goto fail; 1015 1016 nfp = VTOF(nvp); 1017 1018 if (nfp->f_flag & FN_VALID) { 1019 *vpp = nvp; 1020 goto fail; 1021 } 1022 1023 nfp->f_fflag = iep->ie_fflag; 1024 nfp->f_pnumber = iep->ie_fpnumber; 1025 nfp->f_times = iep->ie_ftimes; 1026 1027 if((nfp->f_fflag & NTFS_FFLAG_DIR) && 1028 (nfp->f_attrtype == NTFS_A_DATA) && 1029 (nfp->f_attrname == NULL)) 1030 f_type = VDIR; 1031 else 1032 f_type = VREG; 1033 1034 nvp->v_type = f_type; 1035 1036 if ((nfp->f_attrtype == NTFS_A_DATA) && 1037 (nfp->f_attrname == NULL)) 1038 { 1039 /* Opening default attribute */ 1040 nfp->f_size = iep->ie_fsize; 1041 nfp->f_allocated = iep->ie_fallocated; 1042 nfp->f_flag |= FN_PRELOADED; 1043 } else { 1044 error = ntfs_filesize(ntmp, nfp, 1045 &nfp->f_size, &nfp->f_allocated); 1046 if (error) { 1047 vput(nvp); 1048 goto fail; 1049 } 1050 } 1051 1052 nfp->f_flag &= ~FN_VALID; 1053 *vpp = nvp; 1054 goto fail; 1055 } 1056 1057 /* Dive if possible */ 1058 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) { 1059 dprintf(("ntfs_ntlookupfile: diving\n")); 1060 1061 cn = *(cn_t *) (rdbuf + aoff + 1062 iep->reclen - sizeof(cn_t)); 1063 rdsize = blsize; 1064 1065 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30", 1066 ntfs_cntob(cn), rdsize, rdbuf, NULL); 1067 if (error) 1068 goto fail; 1069 1070 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1071 rdbuf, rdsize); 1072 if (error) 1073 goto fail; 1074 1075 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize + 1076 0x18); 1077 } else if (fullscan && lookup_ctx) { 1078 cn = lookup_ctx->cn; 1079 aoff = lookup_ctx->aoff; 1080 rdsize = lookup_ctx->rdsize; 1081 1082 error = ntfs_readattr(ntmp, ip, 1083 (cn == 0) ? NTFS_A_INDXROOT : NTFS_A_INDX, 1084 "$I30", ntfs_cntob(cn), rdsize, rdbuf, NULL); 1085 if (error) 1086 goto fail; 1087 1088 if (cn != 0) { 1089 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1090 rdbuf, rdsize); 1091 if (error) 1092 goto fail; 1093 } 1094 1095 tctx = lookup_ctx; 1096 lookup_ctx = lookup_ctx->prev; 1097 FREE(tctx, M_TEMP); 1098 } else { 1099 dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n")); 1100 error = ENOENT; 1101 break; 1102 } 1103 } while (1); 1104 1105 /* perform full scan if no entry was found */ 1106 if (!fullscan && error == ENOENT) { 1107 fullscan = 1; 1108 cn = 0; /* need zero, used by lookup_ctx */ 1109 1110 ddprintf(("ntfs_ntlookupfile: fullscan performed for: %.*s\n", 1111 (int) fnamelen, fname)); 1112 goto loop; 1113 } 1114 1115 dprintf(("finish\n")); 1116 1117 fail: 1118 if (attrname) 1119 FREE(attrname, M_TEMP); 1120 if (lookup_ctx) { 1121 while(lookup_ctx) { 1122 tctx = lookup_ctx; 1123 lookup_ctx = lookup_ctx->prev; 1124 FREE(tctx, M_TEMP); 1125 } 1126 } 1127 ntfs_ntvattrrele(vap); 1128 ntfs_ntput(ip); 1129 free(rdbuf, M_TEMP); 1130 return (error); 1131 } 1132 1133 /* 1134 * Check if name type is permitted to show. 1135 */ 1136 int 1137 ntfs_isnamepermitted( 1138 struct ntfsmount * ntmp, 1139 struct attr_indexentry * iep) 1140 { 1141 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES) 1142 return 1; 1143 1144 switch (iep->ie_fnametype) { 1145 case 2: 1146 ddprintf(("ntfs_isnamepermitted: skipped DOS name\n")); 1147 return 0; 1148 case 0: case 1: case 3: 1149 return 1; 1150 default: 1151 printf("ntfs_isnamepermitted: " \ 1152 "WARNING! Unknown file name type: %d\n", 1153 iep->ie_fnametype); 1154 break; 1155 } 1156 return 0; 1157 } 1158 1159 /* 1160 * Read ntfs dir like stream of attr_indexentry, not like btree of them. 1161 * This is done by scanning $BITMAP:$I30 for busy clusters and reading them. 1162 * Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in 1163 * fnode, so we can skip toward record number num almost immediately. 1164 * Anyway this is rather slow routine. The problem is that we don't know 1165 * how many records are there in $INDEX_ALLOCATION:$I30 block. 1166 */ 1167 int 1168 ntfs_ntreaddir( 1169 struct ntfsmount * ntmp, 1170 struct fnode * fp, 1171 u_int32_t num, 1172 struct attr_indexentry ** riepp) 1173 { 1174 struct ntnode *ip = FTONT(fp); 1175 struct ntvattr *vap = NULL; /* IndexRoot attribute */ 1176 struct ntvattr *bmvap = NULL; /* BitMap attribute */ 1177 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */ 1178 caddr_t rdbuf; /* Buffer to read directory's blocks */ 1179 u_char *bmp = NULL; /* Bitmap */ 1180 u_int32_t blsize; /* Index allocation size (2048) */ 1181 u_int32_t rdsize; /* Length of data to read */ 1182 u_int32_t attrnum; /* Current attribute type */ 1183 u_int32_t cpbl = 1; /* Clusters per directory block */ 1184 u_int32_t blnum; 1185 struct attr_indexentry *iep; 1186 int error = ENOENT; 1187 u_int32_t aoff, cnum; 1188 1189 dprintf(("ntfs_ntreaddir: read ino: %d, num: %d\n", ip->i_number, num)); 1190 error = ntfs_ntget(ip); 1191 if (error) 1192 return (error); 1193 1194 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap); 1195 if (error) 1196 return (ENOTDIR); 1197 1198 if (fp->f_dirblbuf == NULL) { 1199 fp->f_dirblsz = vap->va_a_iroot->ir_size; 1200 fp->f_dirblbuf = (caddr_t) malloc( 1201 MAX(vap->va_datalen,fp->f_dirblsz), M_NTFSDIR, M_WAITOK); 1202 } 1203 1204 blsize = fp->f_dirblsz; 1205 rdbuf = fp->f_dirblbuf; 1206 1207 dprintf(("ntfs_ntreaddir: rdbuf: %p, blsize: %d\n", rdbuf, blsize)); 1208 1209 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) { 1210 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 1211 0, &bmvap); 1212 if (error) { 1213 error = ENOTDIR; 1214 goto fail; 1215 } 1216 bmp = (u_char *) malloc(bmvap->va_datalen, M_TEMP, M_WAITOK); 1217 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0, 1218 bmvap->va_datalen, bmp, NULL); 1219 if (error) 1220 goto fail; 1221 1222 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30", 1223 0, &iavap); 1224 if (error) { 1225 error = ENOTDIR; 1226 goto fail; 1227 } 1228 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1); 1229 dprintf(("ntfs_ntreaddir: indexalloc: %qu, cpbl: %d\n", 1230 (long long)iavap->va_datalen, cpbl)); 1231 } else { 1232 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n")); 1233 iavap = bmvap = NULL; 1234 bmp = NULL; 1235 } 1236 1237 /* Try use previous values */ 1238 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) { 1239 attrnum = fp->f_lastdattr; 1240 aoff = fp->f_lastdoff; 1241 blnum = fp->f_lastdblnum; 1242 cnum = fp->f_lastdnum; 1243 } else { 1244 attrnum = NTFS_A_INDXROOT; 1245 aoff = sizeof(struct attr_indexroot); 1246 blnum = 0; 1247 cnum = 0; 1248 } 1249 1250 do { 1251 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n", 1252 attrnum, (u_int32_t) blnum, cnum, num, aoff)); 1253 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize; 1254 error = ntfs_readattr(ntmp, ip, attrnum, "$I30", 1255 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL); 1256 if (error) 1257 goto fail; 1258 1259 if (attrnum == NTFS_A_INDX) { 1260 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1261 rdbuf, rdsize); 1262 if (error) 1263 goto fail; 1264 } 1265 if (aoff == 0) 1266 aoff = (attrnum == NTFS_A_INDX) ? 1267 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) : 1268 sizeof(struct attr_indexroot); 1269 1270 iep = (struct attr_indexentry *) (rdbuf + aoff); 1271 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff); 1272 aoff += iep->reclen, 1273 iep = (struct attr_indexentry *) (rdbuf + aoff)) 1274 { 1275 if (!ntfs_isnamepermitted(ntmp, iep)) continue; 1276 1277 if (cnum >= num) { 1278 fp->f_lastdnum = cnum; 1279 fp->f_lastdoff = aoff; 1280 fp->f_lastdblnum = blnum; 1281 fp->f_lastdattr = attrnum; 1282 1283 *riepp = iep; 1284 1285 error = 0; 1286 goto fail; 1287 } 1288 cnum++; 1289 } 1290 1291 if (iavap) { 1292 if (attrnum == NTFS_A_INDXROOT) 1293 blnum = 0; 1294 else 1295 blnum++; 1296 1297 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) { 1298 if (bmp[blnum >> 3] & (1 << (blnum & 3))) 1299 break; 1300 blnum++; 1301 } 1302 1303 attrnum = NTFS_A_INDX; 1304 aoff = 0; 1305 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen) 1306 break; 1307 dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum)); 1308 } 1309 } while (iavap); 1310 1311 *riepp = NULL; 1312 fp->f_lastdnum = 0; 1313 1314 fail: 1315 if (vap) 1316 ntfs_ntvattrrele(vap); 1317 if (bmvap) 1318 ntfs_ntvattrrele(bmvap); 1319 if (iavap) 1320 ntfs_ntvattrrele(iavap); 1321 if (bmp) 1322 FREE(bmp, M_TEMP); 1323 ntfs_ntput(ip); 1324 return (error); 1325 } 1326 1327 /* 1328 * Convert NTFS times that are in 100 ns units and begins from 1329 * 1601 Jan 1 into unix times. 1330 */ 1331 struct timespec 1332 ntfs_nttimetounix( 1333 u_int64_t nt) 1334 { 1335 struct timespec t; 1336 1337 /* WindowNT times are in 100 ns and from 1601 Jan 1 */ 1338 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100; 1339 t.tv_sec = nt / (1000 * 1000 * 10) - 1340 369LL * 365LL * 24LL * 60LL * 60LL - 1341 89LL * 1LL * 24LL * 60LL * 60LL; 1342 return (t); 1343 } 1344 1345 /* 1346 * Get file times from NTFS_A_NAME attribute. 1347 */ 1348 int 1349 ntfs_times( 1350 struct ntfsmount * ntmp, 1351 struct ntnode * ip, 1352 ntfs_times_t * tm) 1353 { 1354 struct ntvattr *vap; 1355 int error; 1356 1357 dprintf(("ntfs_times: ino: %d...\n", ip->i_number)); 1358 1359 error = ntfs_ntget(ip); 1360 if (error) 1361 return (error); 1362 1363 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap); 1364 if (error) { 1365 ntfs_ntput(ip); 1366 return (error); 1367 } 1368 *tm = vap->va_a_name->n_times; 1369 ntfs_ntvattrrele(vap); 1370 ntfs_ntput(ip); 1371 1372 return (0); 1373 } 1374 1375 /* 1376 * Get file sizes from corresponding attribute. 1377 * 1378 * ntnode under fnode should be locked. 1379 */ 1380 int 1381 ntfs_filesize( 1382 struct ntfsmount * ntmp, 1383 struct fnode * fp, 1384 u_int64_t * size, 1385 u_int64_t * bytes) 1386 { 1387 struct ntvattr *vap; 1388 struct ntnode *ip = FTONT(fp); 1389 u_int64_t sz, bn; 1390 int error; 1391 1392 dprintf(("ntfs_filesize: ino: %d\n", ip->i_number)); 1393 1394 error = ntfs_ntvattrget(ntmp, ip, 1395 fp->f_attrtype, fp->f_attrname, 0, &vap); 1396 if (error) 1397 return (error); 1398 1399 bn = vap->va_allocated; 1400 sz = vap->va_datalen; 1401 1402 dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n", 1403 (u_int32_t) sz, (u_int32_t) bn)); 1404 1405 if (size) 1406 *size = sz; 1407 if (bytes) 1408 *bytes = bn; 1409 1410 ntfs_ntvattrrele(vap); 1411 1412 return (0); 1413 } 1414 1415 /* 1416 * This is one of write routine. 1417 */ 1418 int 1419 ntfs_writeattr_plain( 1420 struct ntfsmount * ntmp, 1421 struct ntnode * ip, 1422 u_int32_t attrnum, 1423 char *attrname, 1424 off_t roff, 1425 size_t rsize, 1426 void *rdata, 1427 size_t * initp, 1428 struct uio *uio) 1429 { 1430 size_t init; 1431 int error = 0; 1432 off_t off = roff, left = rsize, towrite; 1433 caddr_t data = rdata; 1434 struct ntvattr *vap; 1435 *initp = 0; 1436 1437 while (left) { 1438 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 1439 ntfs_btocn(off), &vap); 1440 if (error) 1441 return (error); 1442 towrite = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off); 1443 ddprintf(("ntfs_writeattr_plain: o: %qd, s: %qd (%qu - %qu)\n", 1444 (long long) off, (long long) towrite, 1445 (long long) vap->va_vcnstart, 1446 (long long) vap->va_vcnend)); 1447 error = ntfs_writentvattr_plain(ntmp, ip, vap, 1448 off - ntfs_cntob(vap->va_vcnstart), 1449 towrite, data, &init, uio); 1450 if (error) { 1451 dprintf(("ntfs_writeattr_plain: " \ 1452 "ntfs_writentvattr_plain failed: o: %qd, s: %qd\n", 1453 (long long) off, (long long) towrite)); 1454 dprintf(("ntfs_writeattr_plain: attrib: %qu - %qu\n", 1455 (long long) vap->va_vcnstart, 1456 (long long) vap->va_vcnend)); 1457 ntfs_ntvattrrele(vap); 1458 break; 1459 } 1460 ntfs_ntvattrrele(vap); 1461 left -= towrite; 1462 off += towrite; 1463 data = data + towrite; 1464 *initp += init; 1465 } 1466 1467 return (error); 1468 } 1469 1470 /* 1471 * This is one of write routine. 1472 * 1473 * ntnode should be locked. 1474 */ 1475 int 1476 ntfs_writentvattr_plain( 1477 struct ntfsmount * ntmp, 1478 struct ntnode * ip, 1479 struct ntvattr * vap, 1480 off_t roff, 1481 size_t rsize, 1482 void *rdata, 1483 size_t * initp, 1484 struct uio *uio) 1485 { 1486 int error = 0; 1487 off_t off; 1488 int cnt; 1489 cn_t ccn, ccl, cn, left, cl; 1490 caddr_t data = rdata; 1491 struct buf *bp; 1492 size_t tocopy; 1493 1494 *initp = 0; 1495 1496 if ((vap->va_flag & NTFS_AF_INRUN) == 0) { 1497 dprintf(("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n")); 1498 return ENOTTY; 1499 } 1500 1501 ddprintf(("ntfs_writentvattr_plain: data in run: %lu chains\n", 1502 vap->va_vruncnt)); 1503 1504 off = roff; 1505 left = rsize; 1506 ccl = 0; 1507 ccn = 0; 1508 cnt = 0; 1509 for (; left && (cnt < vap->va_vruncnt); cnt++) { 1510 ccn = vap->va_vruncn[cnt]; 1511 ccl = vap->va_vruncl[cnt]; 1512 1513 ddprintf(("ntfs_writentvattr_plain: " \ 1514 "left %qu, cn: 0x%qx, cl: %qu, off: %qd\n", \ 1515 (long long) left, (long long) ccn, \ 1516 (long long) ccl, (long long) off)); 1517 1518 if (ntfs_cntob(ccl) < off) { 1519 off -= ntfs_cntob(ccl); 1520 cnt++; 1521 continue; 1522 } 1523 if (!ccn && ip->i_number != NTFS_BOOTINO) 1524 continue; /* XXX */ 1525 1526 ccl -= ntfs_btocn(off); 1527 cn = ccn + ntfs_btocn(off); 1528 off = ntfs_btocnoff(off); 1529 1530 while (left && ccl) { 1531 /* 1532 * Always read and write single clusters at a time - 1533 * we need to avoid requesting differently-sized 1534 * blocks at the same disk offsets to avoid 1535 * confusing the buffer cache. 1536 */ 1537 tocopy = MIN(left, ntfs_cntob(1) - off); 1538 cl = ntfs_btocl(tocopy + off); 1539 KASSERT(cl == 1 && tocopy <= ntfs_cntob(1)); 1540 ddprintf(("ntfs_writentvattr_plain: write: " \ 1541 "cn: 0x%qx cl: %qu, off: %qd len: %qu, left: %qu\n", 1542 (long long) cn, (long long) cl, 1543 (long long) off, (long long) tocopy, 1544 (long long) left)); 1545 if ((off == 0) && (tocopy == ntfs_cntob(cl))) 1546 { 1547 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn), 1548 ntfs_cntob(cl), 0, 0); 1549 clrbuf(bp); 1550 } else { 1551 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn), 1552 ntfs_cntob(cl), NOCRED, &bp); 1553 if (error) { 1554 brelse(bp); 1555 return (error); 1556 } 1557 } 1558 if (uio) 1559 uiomove(bp->b_data + off, tocopy, uio); 1560 else 1561 memcpy(bp->b_data + off, data, tocopy); 1562 bawrite(bp); 1563 data = data + tocopy; 1564 *initp += tocopy; 1565 off = 0; 1566 left -= tocopy; 1567 cn += cl; 1568 ccl -= cl; 1569 } 1570 } 1571 1572 if (left) { 1573 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n"); 1574 error = EINVAL; 1575 } 1576 1577 return (error); 1578 } 1579 1580 /* 1581 * This is one of read routines. 1582 * 1583 * ntnode should be locked. 1584 */ 1585 int 1586 ntfs_readntvattr_plain( 1587 struct ntfsmount * ntmp, 1588 struct ntnode * ip, 1589 struct ntvattr * vap, 1590 off_t roff, 1591 size_t rsize, 1592 void *rdata, 1593 size_t * initp, 1594 struct uio *uio) 1595 { 1596 int error = 0; 1597 off_t off; 1598 1599 *initp = 0; 1600 if (vap->va_flag & NTFS_AF_INRUN) { 1601 int cnt; 1602 cn_t ccn, ccl, cn, left, cl; 1603 caddr_t data = rdata; 1604 struct buf *bp; 1605 size_t tocopy; 1606 1607 ddprintf(("ntfs_readntvattr_plain: data in run: %lu chains\n", 1608 vap->va_vruncnt)); 1609 1610 off = roff; 1611 left = rsize; 1612 ccl = 0; 1613 ccn = 0; 1614 cnt = 0; 1615 while (left && (cnt < vap->va_vruncnt)) { 1616 ccn = vap->va_vruncn[cnt]; 1617 ccl = vap->va_vruncl[cnt]; 1618 1619 ddprintf(("ntfs_readntvattr_plain: " \ 1620 "left %qu, cn: 0x%qx, cl: %qu, off: %qd\n", \ 1621 (long long) left, (long long) ccn, 1622 (long long) ccl, (long long) off)); 1623 1624 if (ntfs_cntob(ccl) < off) { 1625 off -= ntfs_cntob(ccl); 1626 cnt++; 1627 continue; 1628 } 1629 if (ccn || ip->i_number == NTFS_BOOTINO) { 1630 ccl -= ntfs_btocn(off); 1631 cn = ccn + ntfs_btocn(off); 1632 off = ntfs_btocnoff(off); 1633 1634 while (left && ccl) { 1635 /* 1636 * Always read single clusters at a 1637 * time - we need to avoid reading 1638 * differently-sized blocks at the 1639 * same disk offsets to avoid 1640 * confusing the buffer cache. 1641 */ 1642 tocopy = MIN(left, 1643 ntfs_cntob(1) - off); 1644 cl = ntfs_btocl(tocopy + off); 1645 KASSERT(cl == 1 && 1646 tocopy <= ntfs_cntob(1)); 1647 1648 ddprintf(("ntfs_readntvattr_plain: " \ 1649 "read: cn: 0x%qx cl: %qu, " \ 1650 "off: %qd len: %qu, left: %qu\n", 1651 (long long) cn, 1652 (long long) cl, 1653 (long long) off, 1654 (long long) tocopy, 1655 (long long) left)); 1656 error = bread(ntmp->ntm_devvp, 1657 ntfs_cntobn(cn), 1658 ntfs_cntob(cl), 1659 NOCRED, &bp); 1660 if (error) { 1661 brelse(bp); 1662 return (error); 1663 } 1664 if (uio) { 1665 uiomove(bp->b_data + off, 1666 tocopy, uio); 1667 } else { 1668 memcpy(data, bp->b_data + off, 1669 tocopy); 1670 } 1671 brelse(bp); 1672 data = data + tocopy; 1673 *initp += tocopy; 1674 off = 0; 1675 left -= tocopy; 1676 cn += cl; 1677 ccl -= cl; 1678 } 1679 } else { 1680 tocopy = MIN(left, ntfs_cntob(ccl) - off); 1681 ddprintf(("ntfs_readntvattr_plain: " 1682 "hole: ccn: 0x%qx ccl: %qu, off: %qd, " \ 1683 " len: %qu, left: %qu\n", 1684 (long long) ccn, (long long) ccl, 1685 (long long) off, (long long) tocopy, 1686 (long long) left)); 1687 left -= tocopy; 1688 off = 0; 1689 if (uio) { 1690 char vbuf[] = ""; 1691 size_t remains = tocopy; 1692 for(; remains; remains--) 1693 uiomove(vbuf, 1, uio); 1694 } else 1695 bzero(data, tocopy); 1696 data = data + tocopy; 1697 } 1698 cnt++; 1699 } 1700 if (left) { 1701 printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n"); 1702 error = E2BIG; 1703 } 1704 } else { 1705 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n")); 1706 if (uio) 1707 uiomove(vap->va_datap + roff, rsize, uio); 1708 else 1709 memcpy(rdata, vap->va_datap + roff, rsize); 1710 *initp += rsize; 1711 } 1712 1713 return (error); 1714 } 1715 1716 /* 1717 * This is one of read routines. 1718 */ 1719 int 1720 ntfs_readattr_plain( 1721 struct ntfsmount * ntmp, 1722 struct ntnode * ip, 1723 u_int32_t attrnum, 1724 const char *attrname, 1725 off_t roff, 1726 size_t rsize, 1727 void *rdata, 1728 size_t * initp, 1729 struct uio *uio) 1730 { 1731 size_t init; 1732 int error = 0; 1733 off_t off = roff, left = rsize, toread; 1734 caddr_t data = rdata; 1735 struct ntvattr *vap; 1736 *initp = 0; 1737 1738 while (left) { 1739 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 1740 ntfs_btocn(off), &vap); 1741 if (error) 1742 return (error); 1743 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off); 1744 ddprintf(("ntfs_readattr_plain: o: %qd, s: %qd (%qu - %qu)\n", 1745 (long long) off, (long long) toread, 1746 (long long) vap->va_vcnstart, 1747 (long long) vap->va_vcnend)); 1748 error = ntfs_readntvattr_plain(ntmp, ip, vap, 1749 off - ntfs_cntob(vap->va_vcnstart), 1750 toread, data, &init, uio); 1751 if (error) { 1752 printf("ntfs_readattr_plain: " \ 1753 "ntfs_readntvattr_plain failed: o: %qd, s: %qd\n", 1754 (long long) off, (long long) toread); 1755 printf("ntfs_readattr_plain: attrib: %qu - %qu\n", 1756 (long long) vap->va_vcnstart, 1757 (long long) vap->va_vcnend); 1758 ntfs_ntvattrrele(vap); 1759 break; 1760 } 1761 ntfs_ntvattrrele(vap); 1762 left -= toread; 1763 off += toread; 1764 data = data + toread; 1765 *initp += init; 1766 } 1767 1768 return (error); 1769 } 1770 1771 /* 1772 * This is one of read routines. 1773 */ 1774 int 1775 ntfs_readattr( 1776 struct ntfsmount * ntmp, 1777 struct ntnode * ip, 1778 u_int32_t attrnum, 1779 const char *attrname, 1780 off_t roff, 1781 size_t rsize, 1782 void *rdata, 1783 struct uio *uio) 1784 { 1785 int error = 0; 1786 struct ntvattr *vap; 1787 size_t init; 1788 1789 ddprintf(("ntfs_readattr: reading %d: 0x%x, from %qd size %qu bytes\n", 1790 ip->i_number, attrnum, (long long) roff, (long long) rsize)); 1791 1792 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap); 1793 if (error) 1794 return (error); 1795 1796 if ((roff > vap->va_datalen) || 1797 (roff + rsize > vap->va_datalen)) { 1798 printf("ntfs_readattr: offset too big: %qd (%qd) > %qu\n", 1799 (long long) roff, (long long) (roff + rsize), 1800 (long long) vap->va_datalen); 1801 ntfs_ntvattrrele(vap); 1802 return (E2BIG); 1803 } 1804 if (vap->va_compression && vap->va_compressalg) { 1805 u_int8_t *cup; 1806 u_int8_t *uup; 1807 off_t off = roff, left = rsize, tocopy; 1808 caddr_t data = rdata; 1809 cn_t cn; 1810 1811 ddprintf(("ntfs_ntreadattr: compression: %d\n", 1812 vap->va_compressalg)); 1813 1814 MALLOC(cup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL), 1815 M_NTFSDECOMP, M_WAITOK); 1816 MALLOC(uup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL), 1817 M_NTFSDECOMP, M_WAITOK); 1818 1819 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1)); 1820 off = roff - ntfs_cntob(cn); 1821 1822 while (left) { 1823 error = ntfs_readattr_plain(ntmp, ip, attrnum, 1824 attrname, ntfs_cntob(cn), 1825 ntfs_cntob(NTFS_COMPUNIT_CL), 1826 cup, &init, NULL); 1827 if (error) 1828 break; 1829 1830 tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off); 1831 1832 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) { 1833 if (uio) 1834 uiomove(cup + off, tocopy, uio); 1835 else 1836 memcpy(data, cup + off, tocopy); 1837 } else if (init == 0) { 1838 if (uio) { 1839 char vbuf[] = ""; 1840 size_t remains = tocopy; 1841 for(; remains; remains--) 1842 uiomove(vbuf, 1, uio); 1843 } 1844 else 1845 bzero(data, tocopy); 1846 } else { 1847 error = ntfs_uncompunit(ntmp, uup, cup); 1848 if (error) 1849 break; 1850 if (uio) 1851 uiomove(uup + off, tocopy, uio); 1852 else 1853 memcpy(data, uup + off, tocopy); 1854 } 1855 1856 left -= tocopy; 1857 data = data + tocopy; 1858 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL); 1859 cn += NTFS_COMPUNIT_CL; 1860 } 1861 1862 FREE(uup, M_NTFSDECOMP); 1863 FREE(cup, M_NTFSDECOMP); 1864 } else 1865 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname, 1866 roff, rsize, rdata, &init, uio); 1867 ntfs_ntvattrrele(vap); 1868 return (error); 1869 } 1870 1871 #if UNUSED_CODE 1872 int 1873 ntfs_parserun( 1874 cn_t * cn, 1875 cn_t * cl, 1876 u_int8_t * run, 1877 u_long len, 1878 u_long *off) 1879 { 1880 u_int8_t sz; 1881 int i; 1882 1883 if (NULL == run) { 1884 printf("ntfs_parsetun: run == NULL\n"); 1885 return (EINVAL); 1886 } 1887 sz = run[(*off)++]; 1888 if (0 == sz) { 1889 printf("ntfs_parserun: trying to go out of run\n"); 1890 return (E2BIG); 1891 } 1892 *cl = 0; 1893 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) { 1894 printf("ntfs_parserun: " \ 1895 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n", 1896 sz, len, *off); 1897 return (EINVAL); 1898 } 1899 for (i = 0; i < (sz & 0xF); i++) 1900 *cl += (u_int32_t) run[(*off)++] << (i << 3); 1901 1902 sz >>= 4; 1903 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) { 1904 printf("ntfs_parserun: " \ 1905 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n", 1906 sz, len, *off); 1907 return (EINVAL); 1908 } 1909 for (i = 0; i < (sz & 0xF); i++) 1910 *cn += (u_int32_t) run[(*off)++] << (i << 3); 1911 1912 return (0); 1913 } 1914 #endif 1915 1916 /* 1917 * Process fixup routine on given buffer. 1918 */ 1919 int 1920 ntfs_procfixups( 1921 struct ntfsmount * ntmp, 1922 u_int32_t magic, 1923 caddr_t xbuf, 1924 size_t len) 1925 { 1926 struct fixuphdr *fhp = (struct fixuphdr *) xbuf; 1927 int i; 1928 u_int16_t fixup; 1929 u_int16_t *fxp; 1930 u_int16_t *cfxp; 1931 1932 if (fhp->fh_magic != magic) { 1933 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n", 1934 fhp->fh_magic, magic); 1935 return (EINVAL); 1936 } 1937 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) { 1938 printf("ntfs_procfixups: " \ 1939 "bad fixups number: %d for %ld bytes block\n", 1940 fhp->fh_fnum, (long)len); /* XXX printf kludge */ 1941 return (EINVAL); 1942 } 1943 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) { 1944 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff); 1945 return (EINVAL); 1946 } 1947 fxp = (u_int16_t *) (xbuf + fhp->fh_foff); 1948 cfxp = (u_int16_t *) (xbuf + ntmp->ntm_bps - 2); 1949 fixup = *fxp++; 1950 for (i = 1; i < fhp->fh_fnum; i++, fxp++) { 1951 if (*cfxp != fixup) { 1952 printf("ntfs_procfixups: fixup %d doesn't match\n", i); 1953 return (EINVAL); 1954 } 1955 *cfxp = *fxp; 1956 cfxp = (u_int16_t *)((caddr_t)cfxp + ntmp->ntm_bps); 1957 } 1958 return (0); 1959 } 1960 1961 #if UNUSED_CODE 1962 int 1963 ntfs_runtocn( 1964 cn_t * cn, 1965 struct ntfsmount * ntmp, 1966 u_int8_t * run, 1967 u_long len, 1968 cn_t vcn) 1969 { 1970 cn_t ccn = 0; 1971 cn_t ccl = 0; 1972 u_long off = 0; 1973 int error = 0; 1974 1975 #if NTFS_DEBUG 1976 int i; 1977 printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n", 1978 run, len, (u_long) vcn); 1979 printf("ntfs_runtocn: run: "); 1980 for (i = 0; i < len; i++) 1981 printf("0x%02x ", run[i]); 1982 printf("\n"); 1983 #endif 1984 1985 if (NULL == run) { 1986 printf("ntfs_runtocn: run == NULL\n"); 1987 return (EINVAL); 1988 } 1989 do { 1990 if (run[off] == 0) { 1991 printf("ntfs_runtocn: vcn too big\n"); 1992 return (E2BIG); 1993 } 1994 vcn -= ccl; 1995 error = ntfs_parserun(&ccn, &ccl, run, len, &off); 1996 if (error) { 1997 printf("ntfs_runtocn: ntfs_parserun failed\n"); 1998 return (error); 1999 } 2000 } while (ccl <= vcn); 2001 *cn = ccn + vcn; 2002 return (0); 2003 } 2004 #endif 2005 2006 /* 2007 * this initializes toupper table & dependant variables to be ready for 2008 * later work 2009 */ 2010 void 2011 ntfs_toupper_init() 2012 { 2013 ntfs_toupper_tab = (wchar *) NULL; 2014 lockinit(&ntfs_toupper_lock, PVFS, "ntfs_toupper", 0, 0); 2015 ntfs_toupper_usecount = 0; 2016 } 2017 2018 /* 2019 * if the ntfs_toupper_tab[] is filled already, just raise use count; 2020 * otherwise read the data from the filesystem we are currently mounting 2021 */ 2022 int 2023 ntfs_toupper_use(mp, ntmp) 2024 struct mount *mp; 2025 struct ntfsmount *ntmp; 2026 { 2027 int error = 0; 2028 struct vnode *vp; 2029 2030 /* get exclusive access */ 2031 lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL); 2032 2033 /* only read the translation data from a file if it hasn't been 2034 * read already */ 2035 if (ntfs_toupper_tab) 2036 goto out; 2037 2038 /* 2039 * Read in Unicode lowercase -> uppercase translation file. 2040 * XXX for now, just the first 256 entries are used anyway, 2041 * so don't bother reading more 2042 */ 2043 MALLOC(ntfs_toupper_tab, wchar *, 256 * 256 * sizeof(wchar), 2044 M_NTFSRDATA, M_WAITOK); 2045 2046 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp))) 2047 goto out; 2048 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 2049 0, 256*256*sizeof(wchar), (char *) ntfs_toupper_tab, 2050 NULL); 2051 vput(vp); 2052 2053 out: 2054 ntfs_toupper_usecount++; 2055 lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL); 2056 return (error); 2057 } 2058 2059 /* 2060 * lower the use count and if it reaches zero, free the memory 2061 * tied by toupper table 2062 */ 2063 void 2064 ntfs_toupper_unuse() 2065 { 2066 /* get exclusive access */ 2067 lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL); 2068 2069 ntfs_toupper_usecount--; 2070 if (ntfs_toupper_usecount == 0) { 2071 FREE(ntfs_toupper_tab, M_NTFSRDATA); 2072 ntfs_toupper_tab = NULL; 2073 } 2074 #ifdef DIAGNOSTIC 2075 else if (ntfs_toupper_usecount < 0) { 2076 panic("ntfs_toupper_unuse(): use count negative: %d", 2077 ntfs_toupper_usecount); 2078 } 2079 #endif 2080 2081 /* release the lock */ 2082 lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL); 2083 } 2084
Indexes created Mon Sep 22 21:09:42 GMT 2025