1 /* $OpenBSD: ntfs_subr.c,v 1.53 2025/01/13 13:58:41 claudio Exp $ */ 2 /* $NetBSD: ntfs_subr.c,v 1.4 2003/04/10 21:37:32 jdolecek Exp $ */ 3 4 /*- 5 * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org) 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * Id: ntfs_subr.c,v 1.4 1999/05/12 09:43:01 semenu Exp 30 */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/namei.h> 35 #include <sys/kernel.h> 36 #include <sys/vnode.h> 37 #include <sys/lock.h> 38 #include <sys/mount.h> 39 #include <sys/buf.h> 40 #include <sys/malloc.h> 41 #include <sys/rwlock.h> 42 #include <sys/specdev.h> 43 44 /* #define NTFS_DEBUG 1 */ 45 #include <ntfs/ntfs.h> 46 #include <ntfs/ntfsmount.h> 47 #include <ntfs/ntfs_inode.h> 48 #include <ntfs/ntfs_vfsops.h> 49 #include <ntfs/ntfs_subr.h> 50 #include <ntfs/ntfs_compr.h> 51 #include <ntfs/ntfs_ihash.h> 52 53 #if defined(NTFS_DEBUG) 54 int ntfs_debug = NTFS_DEBUG; 55 #endif 56 57 /* Local struct used in ntfs_ntlookupfile() */ 58 struct ntfs_lookup_ctx { 59 u_int32_t aoff; 60 u_int32_t rdsize; 61 cn_t cn; 62 struct ntfs_lookup_ctx *prev; 63 }; 64 65 int ntfs_ntlookupattr(struct ntfsmount *, const char *, int, int *, char **); 66 int ntfs_findvattr(struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t); 67 int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t); 68 int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t); 69 70 /* table for mapping Unicode chars into uppercase; it's filled upon first 71 * ntfs mount, freed upon last ntfs umount */ 72 static wchar *ntfs_toupper_tab; 73 #define NTFS_U28(ch) ((((ch) & 0xE0) == 0) ? '_' : (ch) & 0xFF) 74 #define NTFS_TOUPPER(ch) (ntfs_toupper_tab[(unsigned char)(ch)]) 75 struct rwlock ntfs_toupper_lock = RWLOCK_INITIALIZER("ntfs_toupper"); 76 static signed int ntfs_toupper_usecount; 77 78 /* support macro for ntfs_ntvattrget() */ 79 #define NTFS_AALPCMP(aalp,type,name,namelen) ( \ 80 (aalp->al_type == type) && (aalp->al_namelen == namelen) && \ 81 !ntfs_uastrcmp(ntmp, aalp->al_name,aalp->al_namelen,name,namelen) ) 82 83 /* 84 * 85 */ 86 int 87 ntfs_ntvattrrele(struct ntvattr *vap) 88 { 89 DPRINTF("ntfs_ntvattrrele: ino: %u, type: 0x%x\n", 90 vap->va_ip->i_number, vap->va_type); 91 92 ntfs_ntrele(vap->va_ip); 93 94 return (0); 95 } 96 97 /* 98 * find the attribute in the ntnode 99 */ 100 int 101 ntfs_findvattr(struct ntfsmount *ntmp, struct ntnode *ip, 102 struct ntvattr **lvapp, struct ntvattr **vapp, u_int32_t type, 103 const char *name, size_t namelen, cn_t vcn) 104 { 105 int error; 106 struct ntvattr *vap; 107 108 if((ip->i_flag & IN_LOADED) == 0) { 109 DPRINTF("ntfs_findvattr: node not loaded, ino: %u\n", 110 ip->i_number); 111 error = ntfs_loadntnode(ntmp,ip); 112 if (error) { 113 printf("ntfs_findvattr: FAILED TO LOAD INO: %d\n", 114 ip->i_number); 115 return (error); 116 } 117 } else { 118 /* Update LRU loaded list. */ 119 TAILQ_REMOVE(&ntmp->ntm_ntnodeq, ip, i_loaded); 120 TAILQ_INSERT_HEAD(&ntmp->ntm_ntnodeq, ip, i_loaded); 121 } 122 123 *lvapp = NULL; 124 *vapp = NULL; 125 LIST_FOREACH(vap, &ip->i_valist, va_list) { 126 DDPRINTF("ntfs_findvattr: type: 0x%x, vcn: %llu - %llu\n", 127 vap->va_type, vap->va_vcnstart, vap->va_vcnend); 128 if ((vap->va_type == type) && 129 (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) && 130 (vap->va_namelen == namelen) && 131 (strncmp(name, vap->va_name, namelen) == 0)) { 132 *vapp = vap; 133 ntfs_ntref(vap->va_ip); 134 return (0); 135 } 136 if (vap->va_type == NTFS_A_ATTRLIST) 137 *lvapp = vap; 138 } 139 140 return (-1); 141 } 142 143 /* 144 * Search attribute specified in ntnode (load ntnode if necessary). 145 * If not found but ATTR_A_ATTRLIST present, read it in and search through. 146 * VOP_VGET node needed, and lookup through its ntnode (load if necessary). 147 * 148 * ntnode should be locked 149 */ 150 int 151 ntfs_ntvattrget(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t type, 152 const char *name, cn_t vcn, struct ntvattr **vapp) 153 { 154 struct ntvattr *lvap = NULL; 155 struct attr_attrlist *aalp; 156 struct attr_attrlist *nextaalp; 157 struct vnode *newvp; 158 struct ntnode *newip; 159 caddr_t alpool; 160 size_t namelen, len; 161 int error; 162 163 *vapp = NULL; 164 165 if (name) { 166 DPRINTF("ntfs_ntvattrget: ino: %u, type: 0x%x, name: %s, " 167 "vcn: %llu\n", ip->i_number, type, name, vcn); 168 namelen = strlen(name); 169 } else { 170 DPRINTF("ntfs_ntvattrget: ino: %u, type: 0x%x, vcn: %llu\n", 171 ip->i_number, type, vcn); 172 name = ""; 173 namelen = 0; 174 } 175 176 error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn); 177 if (error >= 0) 178 return (error); 179 180 if (!lvap) { 181 DPRINTF("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: ino: %u, " 182 "type: 0x%x, name: %s, vcn: %llu\n", ip->i_number, type, 183 name, vcn); 184 return (ENOENT); 185 } 186 /* Scan $ATTRIBUTE_LIST for requested attribute */ 187 len = lvap->va_datalen; 188 alpool = malloc(len, M_TEMP, M_WAITOK); 189 error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len, 190 NULL); 191 if (error) 192 goto out; 193 194 aalp = (struct attr_attrlist *) alpool; 195 nextaalp = NULL; 196 197 for(; len > 0; aalp = nextaalp) { 198 DPRINTF("ntfs_ntvattrget: attrlist: ino: %u, attr: 0x%x, " 199 "vcn: %llu\n", aalp->al_inumber, aalp->al_type, 200 aalp->al_vcnstart); 201 202 if (len > aalp->reclen) { 203 nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *); 204 } else { 205 nextaalp = NULL; 206 } 207 len -= aalp->reclen; 208 209 if (!NTFS_AALPCMP(aalp, type, name, namelen) || 210 (nextaalp && (nextaalp->al_vcnstart <= vcn) && 211 NTFS_AALPCMP(nextaalp, type, name, namelen))) 212 continue; 213 214 DPRINTF("ntfs_ntvattrget: attribute in ino: %u\n", 215 aalp->al_inumber); 216 217 /* this is not a main record, so we can't use just plain 218 vget() */ 219 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber, 220 NTFS_A_DATA, NULL, LK_EXCLUSIVE, 221 VG_EXT, &newvp); 222 if (error) { 223 printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n", 224 aalp->al_inumber); 225 goto out; 226 } 227 newip = VTONT(newvp); 228 /* XXX have to lock ntnode */ 229 error = ntfs_findvattr(ntmp, newip, &lvap, vapp, 230 type, name, namelen, vcn); 231 vput(newvp); 232 if (error == 0) 233 goto out; 234 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n"); 235 break; 236 } 237 error = ENOENT; 238 239 DPRINTF("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: ino: %u, type: 0x%x, " 240 "name: %.*s, vcn: %llu\n", ip->i_number, type, 241 (unsigned int)namelen, name, vcn); 242 out: 243 free(alpool, M_TEMP, 0); 244 return (error); 245 } 246 247 /* 248 * Read ntnode from disk, make ntvattr list. 249 * 250 * ntnode should be locked 251 */ 252 int 253 ntfs_loadntnode(struct ntfsmount *ntmp, struct ntnode *ip) 254 { 255 struct ntnode *oip; 256 struct ntvattr *vap; 257 struct filerec *mfrp; 258 struct attr *ap; 259 daddr_t bn; 260 int error,off; 261 262 DPRINTF("ntfs_loadntnode: loading ino: %u\n", ip->i_number); 263 264 KASSERT((ip->i_flag & IN_LOADED) == 0); 265 266 if (ntmp->ntm_ntnodes >= LOADED_NTNODE_HI) { 267 oip = TAILQ_LAST(&ntmp->ntm_ntnodeq, ntnodeq); 268 TAILQ_REMOVE(&ntmp->ntm_ntnodeq, oip, i_loaded); 269 ntmp->ntm_ntnodes--; 270 271 DPRINTF("ntfs_loadntnode: unloading ino: %u\n", oip->i_number); 272 273 KASSERT((oip->i_flag & IN_LOADED)); 274 oip->i_flag &= ~IN_LOADED; 275 while ((vap = LIST_FIRST(&oip->i_valist)) != NULL) { 276 LIST_REMOVE(vap, va_list); 277 ntfs_freentvattr(vap); 278 } 279 } 280 281 mfrp = malloc(ntfs_bntob(ntmp->ntm_bpmftrec), M_TEMP, M_WAITOK); 282 283 if (ip->i_number < NTFS_SYSNODESNUM) { 284 struct buf *bp; 285 286 DPRINTF("ntfs_loadntnode: read system node\n"); 287 288 bn = ntfs_cntobn(ntmp->ntm_mftcn) + 289 ntmp->ntm_bpmftrec * ip->i_number; 290 291 error = bread(ntmp->ntm_devvp, bn, 292 ntfs_bntob(ntmp->ntm_bpmftrec), &bp); 293 if (error) { 294 printf("ntfs_loadntnode: BREAD FAILED\n"); 295 brelse(bp); 296 goto out; 297 } 298 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec)); 299 brelse(bp); 300 } else { 301 struct vnode *vp; 302 303 vp = ntmp->ntm_sysvn[NTFS_MFTINO]; 304 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 305 ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec), 306 ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL); 307 if (error) { 308 printf("ntfs_loadntnode: ntfs_readattr failed\n"); 309 goto out; 310 } 311 } 312 313 /* Check if magic and fixups are correct */ 314 error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp, 315 ntfs_bntob(ntmp->ntm_bpmftrec)); 316 if (error) { 317 printf("ntfs_loadntnode: BAD MFT RECORD %d\n", 318 (u_int32_t) ip->i_number); 319 goto out; 320 } 321 322 DPRINTF("ntfs_loadntnode: load attrs for ino: %u\n", ip->i_number); 323 off = mfrp->fr_attroff; 324 ap = (struct attr *) ((caddr_t)mfrp + off); 325 326 LIST_INIT(&ip->i_valist); 327 328 while (ap->a_hdr.a_type != -1) { 329 error = ntfs_attrtontvattr(ntmp, &vap, ap); 330 if (error) 331 break; 332 vap->va_ip = ip; 333 334 LIST_INSERT_HEAD(&ip->i_valist, vap, va_list); 335 336 off += ap->a_hdr.reclen; 337 ap = (struct attr *) ((caddr_t)mfrp + off); 338 } 339 if (error) { 340 printf("ntfs_loadntnode: failed to load attr ino: %d\n", 341 ip->i_number); 342 goto out; 343 } 344 345 ip->i_mainrec = mfrp->fr_mainrec; 346 ip->i_nlink = mfrp->fr_nlink; 347 ip->i_frflag = mfrp->fr_flags; 348 349 ip->i_flag |= IN_LOADED; 350 351 /* Add to loaded list. */ 352 TAILQ_INSERT_HEAD(&ntmp->ntm_ntnodeq, ip, i_loaded); 353 ntmp->ntm_ntnodes++; 354 355 out: 356 free(mfrp, M_TEMP, 0); 357 return (error); 358 } 359 360 /* 361 * Routine locks ntnode and increase usecount, just opposite of 362 * ntfs_ntput(). 363 */ 364 int 365 ntfs_ntget(struct ntnode *ip) 366 { 367 DPRINTF("ntfs_ntget: get ntnode %u: %p, usecount: %d\n", 368 ip->i_number, ip, ip->i_usecount); 369 370 ip->i_usecount++; 371 372 rw_enter_write(&ip->i_lock); 373 374 return 0; 375 } 376 377 /* 378 * Routine search ntnode in hash, if found: lock, inc usecount and return. 379 * If not in hash allocate structure for ntnode, prefill it, lock, 380 * inc count and return. 381 * 382 * ntnode returned locked 383 */ 384 int 385 ntfs_ntlookup(struct ntfsmount *ntmp, ntfsino_t ino, struct ntnode **ipp) 386 { 387 struct ntnode *ip; 388 389 DPRINTF("ntfs_ntlookup: looking for ntnode %u\n", ino); 390 391 retry: 392 if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) { 393 ntfs_ntget(ip); 394 DPRINTF("ntfs_ntlookup: ntnode %u: %p, usecount: %d\n", 395 ino, ip, ip->i_usecount); 396 *ipp = ip; 397 return (0); 398 } 399 400 ip = malloc(sizeof(*ip), M_NTFSNTNODE, M_WAITOK | M_ZERO); 401 DDPRINTF("ntfs_ntlookup: allocating ntnode: %u: %p\n", ino, ip); 402 403 /* Generic initialization */ 404 ip->i_devvp = ntmp->ntm_devvp; 405 ip->i_dev = ntmp->ntm_dev; 406 ip->i_number = ino; 407 ip->i_mp = ntmp; 408 409 LIST_INIT(&ip->i_fnlist); 410 LIST_INIT(&ip->i_valist); 411 vref(ip->i_devvp); 412 413 /* init lock and lock the newborn ntnode */ 414 rw_init(&ip->i_lock, "ntnode"); 415 ntfs_ntget(ip); 416 417 if (ntfs_nthashins(ip) != 0) { 418 ntfs_ntput(ip); 419 goto retry; 420 } 421 422 *ipp = ip; 423 424 DPRINTF("ntfs_ntlookup: ntnode %u: %p, usecount: %d\n", 425 ino, ip, ip->i_usecount); 426 427 return (0); 428 } 429 430 /* 431 * Decrement usecount of ntnode and unlock it, if usecount reach zero, 432 * deallocate ntnode. 433 * 434 * ntnode should be locked on entry, and unlocked on return. 435 */ 436 void 437 ntfs_ntput(struct ntnode *ip) 438 { 439 struct ntfsmount *ntmp = ip->i_mp; 440 struct ntvattr *vap; 441 442 DPRINTF("ntfs_ntput: rele ntnode %u: %p, usecount: %d\n", 443 ip->i_number, ip, ip->i_usecount); 444 445 ip->i_usecount--; 446 447 #ifdef DIAGNOSTIC 448 if (ip->i_usecount < 0) { 449 panic("ntfs_ntput: ino: %d usecount: %d ", 450 ip->i_number,ip->i_usecount); 451 } 452 #endif 453 454 if (ip->i_usecount > 0) { 455 rw_exit_write(&ip->i_lock); 456 return; 457 } 458 459 DPRINTF("ntfs_ntput: deallocating ntnode: %u\n", ip->i_number); 460 461 if (LIST_FIRST(&ip->i_fnlist)) 462 panic("ntfs_ntput: ntnode has fnodes"); 463 464 ntfs_nthashrem(ip); 465 466 /* Remove from loaded list. */ 467 if (ip->i_flag & IN_LOADED) { 468 TAILQ_REMOVE(&ntmp->ntm_ntnodeq, ip, i_loaded); 469 ntmp->ntm_ntnodes--; 470 } 471 472 while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) { 473 LIST_REMOVE(vap, va_list); 474 ntfs_freentvattr(vap); 475 } 476 477 vrele(ip->i_devvp); 478 free(ip, M_NTFSNTNODE, 0); 479 } 480 481 /* 482 * increment usecount of ntnode 483 */ 484 void 485 ntfs_ntref(struct ntnode *ip) 486 { 487 ip->i_usecount++; 488 489 DPRINTF("ntfs_ntref: ino %u, usecount: %d\n", 490 ip->i_number, ip->i_usecount); 491 } 492 493 /* 494 * Decrement usecount of ntnode. 495 */ 496 void 497 ntfs_ntrele(struct ntnode *ip) 498 { 499 DPRINTF("ntfs_ntrele: rele ntnode %u: %p, usecount: %d\n", 500 ip->i_number, ip, ip->i_usecount); 501 502 ip->i_usecount--; 503 504 if (ip->i_usecount < 0) 505 panic("ntfs_ntrele: ino: %d usecount: %d ", 506 ip->i_number,ip->i_usecount); 507 } 508 509 /* 510 * Deallocate all memory allocated for ntvattr 511 */ 512 void 513 ntfs_freentvattr(struct ntvattr *vap) 514 { 515 if (vap->va_flag & NTFS_AF_INRUN) { 516 if (vap->va_vruncn) 517 free(vap->va_vruncn, M_NTFSRUN, 0); 518 if (vap->va_vruncl) 519 free(vap->va_vruncl, M_NTFSRUN, 0); 520 } else { 521 if (vap->va_datap) 522 free(vap->va_datap, M_NTFSRDATA, 0); 523 } 524 free(vap, M_NTFSNTVATTR, 0); 525 } 526 527 /* 528 * Convert disk image of attribute into ntvattr structure, 529 * runs are expanded also. 530 */ 531 int 532 ntfs_attrtontvattr(struct ntfsmount *ntmp, struct ntvattr **rvapp, 533 struct attr *rap) 534 { 535 int error, i; 536 struct ntvattr *vap; 537 538 error = 0; 539 *rvapp = NULL; 540 541 vap = malloc(sizeof(*vap), M_NTFSNTVATTR, M_WAITOK | M_ZERO); 542 vap->va_ip = NULL; 543 vap->va_flag = rap->a_hdr.a_flag; 544 vap->va_type = rap->a_hdr.a_type; 545 vap->va_compression = rap->a_hdr.a_compression; 546 vap->va_index = rap->a_hdr.a_index; 547 548 DDPRINTF("type: 0x%x, index: %u", vap->va_type, vap->va_index); 549 550 vap->va_namelen = rap->a_hdr.a_namelen; 551 if (rap->a_hdr.a_namelen) { 552 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff); 553 DDPRINTF(", name:["); 554 for (i = 0; i < vap->va_namelen; i++) { 555 vap->va_name[i] = unp[i]; 556 DDPRINTF("%c", vap->va_name[i]); 557 } 558 DDPRINTF("]"); 559 } 560 if (vap->va_flag & NTFS_AF_INRUN) { 561 DDPRINTF(", nonres."); 562 vap->va_datalen = rap->a_nr.a_datalen; 563 vap->va_allocated = rap->a_nr.a_allocated; 564 vap->va_vcnstart = rap->a_nr.a_vcnstart; 565 vap->va_vcnend = rap->a_nr.a_vcnend; 566 vap->va_compressalg = rap->a_nr.a_compressalg; 567 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl), 568 &(vap->va_vruncnt), 569 (caddr_t) rap + rap->a_nr.a_dataoff); 570 } else { 571 vap->va_compressalg = 0; 572 DDPRINTF(", res."); 573 vap->va_datalen = rap->a_r.a_datalen; 574 vap->va_allocated = rap->a_r.a_datalen; 575 vap->va_vcnstart = 0; 576 vap->va_vcnend = ntfs_btocn(vap->va_allocated); 577 vap->va_datap = malloc(vap->va_datalen, M_NTFSRDATA, M_WAITOK); 578 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff, 579 rap->a_r.a_datalen); 580 } 581 DDPRINTF(", len: %llu", vap->va_datalen); 582 583 if (error) 584 free(vap, M_NTFSNTVATTR, 0); 585 else 586 *rvapp = vap; 587 588 DDPRINTF("\n"); 589 590 return (error); 591 } 592 593 /* 594 * Expand run into more utilizable and more memory eating format. 595 */ 596 int 597 ntfs_runtovrun(cn_t **rcnp, cn_t **rclp, u_long *rcntp, u_int8_t *run) 598 { 599 u_int32_t off; 600 u_int32_t sz, i; 601 cn_t *cn; 602 cn_t *cl; 603 u_long cnt; 604 cn_t prev; 605 cn_t tmp; 606 607 off = 0; 608 cnt = 0; 609 while (run[off]) { 610 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1; 611 cnt++; 612 } 613 cn = mallocarray(cnt, sizeof(cn_t), M_NTFSRUN, M_WAITOK); 614 cl = mallocarray(cnt, sizeof(cn_t), M_NTFSRUN, M_WAITOK); 615 616 off = 0; 617 cnt = 0; 618 prev = 0; 619 while (run[off]) { 620 621 sz = run[off++]; 622 cl[cnt] = 0; 623 624 for (i = 0; i < (sz & 0xF); i++) 625 cl[cnt] += (u_int32_t) run[off++] << (i << 3); 626 627 sz >>= 4; 628 if (run[off + sz - 1] & 0x80) { 629 tmp = ((u_int64_t) - 1) << (sz << 3); 630 for (i = 0; i < sz; i++) 631 tmp |= (u_int64_t) run[off++] << (i << 3); 632 } else { 633 tmp = 0; 634 for (i = 0; i < sz; i++) 635 tmp |= (u_int64_t) run[off++] << (i << 3); 636 } 637 if (tmp) 638 prev = cn[cnt] = prev + tmp; 639 else 640 cn[cnt] = tmp; 641 642 cnt++; 643 } 644 *rcnp = cn; 645 *rclp = cl; 646 *rcntp = cnt; 647 return (0); 648 } 649 650 /* 651 * Compare unicode and ascii string case insens. 652 */ 653 int 654 ntfs_uastricmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen, 655 const char *astr, size_t astrlen) 656 { 657 size_t i; 658 int res; 659 const char *astrend = astr + astrlen; 660 661 for (i = 0; i < ustrlen && astr < astrend; i++) { 662 res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i]), 663 NTFS_TOUPPER((*ntmp->ntm_wget)(&astr)) ); 664 if (res) 665 return res; 666 } 667 668 if (i == ustrlen && astr == astrend) 669 return 0; 670 else if (i == ustrlen) 671 return -1; 672 else 673 return 1; 674 } 675 676 /* 677 * Compare unicode and ascii string case sens. 678 */ 679 int 680 ntfs_uastrcmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen, 681 const char *astr, size_t astrlen) 682 { 683 size_t i; 684 int res; 685 const char *astrend = astr + astrlen; 686 687 for (i = 0; (i < ustrlen) && (astr < astrend); i++) { 688 res = (*ntmp->ntm_wcmp)(ustr[i], (*ntmp->ntm_wget)(&astr)); 689 if (res) 690 return res; 691 } 692 693 if (i == ustrlen && astr == astrend) 694 return 0; 695 else if (i == ustrlen) 696 return -1; 697 else 698 return 1; 699 } 700 701 /* 702 * Search fnode in ntnode, if not found allocate and preinitialize. 703 * 704 * ntnode should be locked on entry. 705 */ 706 int 707 ntfs_fget(struct ntfsmount *ntmp, struct ntnode *ip, int attrtype, 708 char *attrname, struct fnode **fpp) 709 { 710 struct fnode *fp; 711 712 DPRINTF("ntfs_fget: ino: %u, attrtype: 0x%x, attrname: %s\n", 713 ip->i_number, attrtype, attrname ? attrname : ""); 714 *fpp = NULL; 715 LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist) { 716 DPRINTF("ntfs_fget: fnode: attrtype: %u, attrname: %s\n", 717 fp->f_attrtype, fp->f_attrname ? fp->f_attrname : ""); 718 719 if ((attrtype == fp->f_attrtype) && 720 ((!attrname && !fp->f_attrname) || 721 (attrname && fp->f_attrname && 722 !strcmp(attrname,fp->f_attrname)))){ 723 DPRINTF("ntfs_fget: found existed: %p\n", fp); 724 *fpp = fp; 725 } 726 } 727 728 if (*fpp) 729 return (0); 730 731 fp = malloc(sizeof(*fp), M_NTFSFNODE, M_WAITOK | M_ZERO); 732 DPRINTF("ntfs_fget: allocating fnode: %p\n", fp); 733 734 fp->f_ip = ip; 735 fp->f_attrname = attrname; 736 if (fp->f_attrname) fp->f_flag |= FN_AATTRNAME; 737 fp->f_attrtype = attrtype; 738 739 ntfs_ntref(ip); 740 741 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist); 742 743 *fpp = fp; 744 745 return (0); 746 } 747 748 /* 749 * Deallocate fnode, remove it from ntnode's fnode list. 750 * 751 * ntnode should be locked. 752 */ 753 void 754 ntfs_frele(struct fnode *fp) 755 { 756 struct ntnode *ip = FTONT(fp); 757 758 DPRINTF("ntfs_frele: fnode: %p for %u: %p\n", fp, ip->i_number, ip); 759 760 DPRINTF("ntfs_frele: deallocating fnode\n"); 761 LIST_REMOVE(fp,f_fnlist); 762 if (fp->f_flag & FN_AATTRNAME) 763 free(fp->f_attrname, M_TEMP, 0); 764 if (fp->f_dirblbuf) 765 free(fp->f_dirblbuf, M_NTFSDIR, 0); 766 free(fp, M_NTFSFNODE, 0); 767 ntfs_ntrele(ip); 768 } 769 770 /* 771 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 772 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs. 773 * If $ATTR_TYPE not specified, ATTR_A_DATA assumed. 774 */ 775 int 776 ntfs_ntlookupattr(struct ntfsmount *ntmp, const char *name, int namelen, 777 int *attrtype, char **attrname) 778 { 779 const char *sys; 780 size_t syslen, i; 781 struct ntvattrdef *adp; 782 783 if (namelen == 0) 784 return (0); 785 786 if (name[0] == '$') { 787 sys = name; 788 for (syslen = 0; syslen < namelen; syslen++) { 789 if(sys[syslen] == ':') { 790 name++; 791 namelen--; 792 break; 793 } 794 } 795 name += syslen; 796 namelen -= syslen; 797 798 adp = ntmp->ntm_ad; 799 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){ 800 if (syslen != adp->ad_namelen || 801 strncmp(sys, adp->ad_name, syslen) != 0) 802 continue; 803 804 *attrtype = adp->ad_type; 805 goto out; 806 } 807 return (ENOENT); 808 } 809 810 out: 811 if (namelen) { 812 *attrname = malloc(namelen + 1, M_TEMP, M_WAITOK); 813 memcpy(*attrname, name, namelen); 814 (*attrname)[namelen] = '\0'; 815 *attrtype = NTFS_A_DATA; 816 } 817 818 return (0); 819 } 820 821 /* 822 * Lookup specified node for filename, matching cnp, return fnode filled. 823 */ 824 int 825 ntfs_ntlookupfile(struct ntfsmount *ntmp, struct vnode *vp, 826 struct componentname *cnp, struct vnode **vpp) 827 { 828 struct fnode *fp = VTOF(vp); 829 struct ntnode *ip = FTONT(fp); 830 struct ntvattr *vap = NULL; /* Root attribute */ 831 cn_t cn = 0; /* VCN in current attribute */ 832 caddr_t rdbuf = NULL; /* Buffer to read directory's blocks */ 833 u_int32_t blsize; 834 u_int32_t rdsize; /* Length of data to read from current block */ 835 struct attr_indexentry *iep; 836 int error, res, anamelen, fnamelen; 837 const char *fname,*aname; 838 u_int32_t aoff; 839 int attrtype = NTFS_A_DATA; 840 char *attrname = NULL; 841 struct fnode *nfp; 842 struct vnode *nvp; 843 enum vtype f_type; 844 int fullscan = 0; 845 struct ntfs_lookup_ctx *lookup_ctx = NULL, *tctx; 846 847 error = ntfs_ntget(ip); 848 if (error) 849 return (error); 850 851 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap); 852 if (error || (vap->va_flag & NTFS_AF_INRUN)) { 853 error = ENOTDIR; 854 goto fail; 855 } 856 857 /* 858 * Divide file name into: foofilefoofilefoofile[:attrspec] 859 * Store like this: fname:fnamelen [aname:anamelen] 860 */ 861 fname = cnp->cn_nameptr; 862 aname = NULL; 863 anamelen = 0; 864 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++) 865 if(fname[fnamelen] == ':') { 866 aname = fname + fnamelen + 1; 867 anamelen = cnp->cn_namelen - fnamelen - 1; 868 DPRINTF("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n", 869 fname, fnamelen, aname, anamelen); 870 break; 871 } 872 873 blsize = vap->va_a_iroot->ir_size; 874 DPRINTF("ntfs_ntlookupfile: blksz: %u\n", blsize); 875 876 rdbuf = malloc(blsize, M_TEMP, M_WAITOK); 877 878 loop: 879 rdsize = vap->va_datalen; 880 DPRINTF("ntfs_ntlookupfile: rdsz: %u\n", rdsize); 881 882 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30", 883 0, rdsize, rdbuf, NULL); 884 if (error) 885 goto fail; 886 887 aoff = sizeof(struct attr_indexroot); 888 889 do { 890 iep = (struct attr_indexentry *) (rdbuf + aoff); 891 892 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff); 893 aoff += iep->reclen, 894 iep = (struct attr_indexentry *) (rdbuf + aoff)) 895 { 896 DDPRINTF("scan: %u, %u\n", iep->ie_number, 897 iep->ie_fnametype); 898 899 /* check the name - the case-insensitive check 900 * has to come first, to break from this for loop 901 * if needed, so we can dive correctly */ 902 res = ntfs_uastricmp(ntmp, iep->ie_fname, 903 iep->ie_fnamelen, fname, fnamelen); 904 if (!fullscan) { 905 if (res > 0) break; 906 if (res < 0) continue; 907 } 908 909 if (iep->ie_fnametype == 0 || 910 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS)) 911 { 912 res = ntfs_uastrcmp(ntmp, iep->ie_fname, 913 iep->ie_fnamelen, fname, fnamelen); 914 if (res != 0 && !fullscan) continue; 915 } 916 917 /* if we perform full scan, the file does not match 918 * and this is subnode, dive */ 919 if (fullscan && res != 0) { 920 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) { 921 tctx = malloc(sizeof(struct ntfs_lookup_ctx), 922 M_TEMP, M_WAITOK); 923 tctx->aoff = aoff + iep->reclen; 924 tctx->rdsize = rdsize; 925 tctx->cn = cn; 926 tctx->prev = lookup_ctx; 927 lookup_ctx = tctx; 928 break; 929 } else 930 continue; 931 } 932 933 if (aname) { 934 error = ntfs_ntlookupattr(ntmp, 935 aname, anamelen, 936 &attrtype, &attrname); 937 if (error) 938 goto fail; 939 } 940 941 /* Check if we've found ourselves */ 942 if ((iep->ie_number == ip->i_number) && 943 (attrtype == fp->f_attrtype) && 944 ((!attrname && !fp->f_attrname) || 945 (attrname && fp->f_attrname && 946 !strcmp(attrname, fp->f_attrname)))) 947 { 948 vref(vp); 949 *vpp = vp; 950 error = 0; 951 goto fail; 952 } 953 954 /* free the buffer returned by ntfs_ntlookupattr() */ 955 if (attrname) { 956 free(attrname, M_TEMP, 0); 957 attrname = NULL; 958 } 959 960 /* vget node, but don't load it */ 961 error = ntfs_vgetex(ntmp->ntm_mountp, 962 iep->ie_number, attrtype, attrname, 963 LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN, 964 &nvp); 965 if (error) 966 goto fail; 967 968 nfp = VTOF(nvp); 969 970 if (nfp->f_flag & FN_VALID) { 971 *vpp = nvp; 972 goto fail; 973 } 974 975 nfp->f_fflag = iep->ie_fflag; 976 nfp->f_pnumber = iep->ie_fpnumber; 977 nfp->f_times = iep->ie_ftimes; 978 979 if((nfp->f_fflag & NTFS_FFLAG_DIR) && 980 (nfp->f_attrtype == NTFS_A_DATA) && 981 (nfp->f_attrname == NULL)) 982 f_type = VDIR; 983 else 984 f_type = VREG; 985 986 nvp->v_type = f_type; 987 988 if ((nfp->f_attrtype == NTFS_A_DATA) && 989 (nfp->f_attrname == NULL)) 990 { 991 /* Opening default attribute */ 992 nfp->f_size = iep->ie_fsize; 993 nfp->f_allocated = iep->ie_fallocated; 994 nfp->f_flag |= FN_PRELOADED; 995 } else { 996 error = ntfs_filesize(ntmp, nfp, 997 &nfp->f_size, &nfp->f_allocated); 998 if (error) { 999 vput(nvp); 1000 goto fail; 1001 } 1002 } 1003 1004 nfp->f_flag &= ~FN_VALID; 1005 *vpp = nvp; 1006 goto fail; 1007 } 1008 1009 /* Dive if possible */ 1010 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) { 1011 DPRINTF("ntfs_ntlookupfile: diving\n"); 1012 1013 cn = *(cn_t *) (rdbuf + aoff + 1014 iep->reclen - sizeof(cn_t)); 1015 rdsize = blsize; 1016 1017 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30", 1018 ntfs_cntob(cn), rdsize, rdbuf, NULL); 1019 if (error) 1020 goto fail; 1021 1022 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1023 rdbuf, rdsize); 1024 if (error) 1025 goto fail; 1026 1027 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize + 1028 0x18); 1029 } else if (fullscan && lookup_ctx) { 1030 cn = lookup_ctx->cn; 1031 aoff = lookup_ctx->aoff; 1032 rdsize = lookup_ctx->rdsize; 1033 1034 error = ntfs_readattr(ntmp, ip, 1035 (cn == 0) ? NTFS_A_INDXROOT : NTFS_A_INDX, 1036 "$I30", ntfs_cntob(cn), rdsize, rdbuf, NULL); 1037 if (error) 1038 goto fail; 1039 1040 if (cn != 0) { 1041 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1042 rdbuf, rdsize); 1043 if (error) 1044 goto fail; 1045 } 1046 1047 tctx = lookup_ctx; 1048 lookup_ctx = lookup_ctx->prev; 1049 free(tctx, M_TEMP, 0); 1050 } else { 1051 DPRINTF("ntfs_ntlookupfile: nowhere to dive :-(\n"); 1052 error = ENOENT; 1053 break; 1054 } 1055 } while (1); 1056 1057 if (error == ENOENT) { 1058 /* perform full scan if no entry was found */ 1059 if (!fullscan) { 1060 fullscan = 1; 1061 cn = 0; /* need zero, used by lookup_ctx */ 1062 1063 DDPRINTF("ntfs_ntlookupfile: fullscan performed for: %.*s\n", 1064 (unsigned int)fnamelen, fname); 1065 goto loop; 1066 } 1067 1068 if ((cnp->cn_flags & ISLASTCN) && 1069 (cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME)) 1070 error = EJUSTRETURN; 1071 } 1072 1073 DPRINTF("finish\n"); 1074 1075 fail: 1076 if (vap) 1077 ntfs_ntvattrrele(vap); 1078 if (rdbuf) 1079 free(rdbuf, M_TEMP, 0); 1080 if (attrname) 1081 free(attrname, M_TEMP, 0); 1082 if (lookup_ctx) { 1083 while(lookup_ctx) { 1084 tctx = lookup_ctx; 1085 lookup_ctx = lookup_ctx->prev; 1086 free(tctx, M_TEMP, 0); 1087 } 1088 } 1089 ntfs_ntput(ip); 1090 return (error); 1091 } 1092 1093 /* 1094 * Check if name type is permitted to show. 1095 */ 1096 int 1097 ntfs_isnamepermitted(struct ntfsmount *ntmp, struct attr_indexentry *iep) 1098 { 1099 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES) 1100 return 1; 1101 1102 switch (iep->ie_fnametype) { 1103 case 2: 1104 DDPRINTF("ntfs_isnamepermitted: skipped DOS name\n"); 1105 return 0; 1106 case 0: case 1: case 3: 1107 return 1; 1108 default: 1109 printf("ntfs_isnamepermitted: " \ 1110 "WARNING! Unknown file name type: %d\n", 1111 iep->ie_fnametype); 1112 break; 1113 } 1114 return 0; 1115 } 1116 1117 /* 1118 * Read ntfs dir like stream of attr_indexentry, not like btree of them. 1119 * This is done by scanning $BITMAP:$I30 for busy clusters and reading them. 1120 * Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in 1121 * fnode, so we can skip toward record number num almost immediately. 1122 * Anyway this is rather slow routine. The problem is that we don't know 1123 * how many records are there in $INDEX_ALLOCATION:$I30 block. 1124 */ 1125 int 1126 ntfs_ntreaddir(struct ntfsmount *ntmp, struct fnode *fp, u_int32_t num, 1127 struct attr_indexentry **riepp, struct proc *p) 1128 { 1129 struct ntnode *ip = FTONT(fp); 1130 struct ntvattr *vap = NULL; /* IndexRoot attribute */ 1131 struct ntvattr *bmvap = NULL; /* BitMap attribute */ 1132 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */ 1133 caddr_t rdbuf; /* Buffer to read directory's blocks */ 1134 u_int8_t *bmp = NULL; /* Bitmap */ 1135 u_int32_t blsize; /* Index allocation size (2048) */ 1136 u_int32_t rdsize; /* Length of data to read */ 1137 u_int32_t attrnum; /* Current attribute type */ 1138 u_int32_t cpbl = 1; /* Clusters per directory block */ 1139 u_int32_t blnum; 1140 struct attr_indexentry *iep; 1141 int error = ENOENT; 1142 u_int32_t aoff, cnum; 1143 1144 DPRINTF("ntfs_ntreaddir: read ino: %u, num: %u\n", ip->i_number, num); 1145 error = ntfs_ntget(ip); 1146 if (error) 1147 return (error); 1148 1149 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap); 1150 if (error) { 1151 error = ENOTDIR; 1152 goto fail; 1153 } 1154 1155 if (fp->f_dirblbuf == NULL) { 1156 fp->f_dirblsz = vap->va_a_iroot->ir_size; 1157 fp->f_dirblbuf = malloc(MAX(vap->va_datalen,fp->f_dirblsz), 1158 M_NTFSDIR, M_WAITOK); 1159 } 1160 1161 blsize = fp->f_dirblsz; 1162 rdbuf = fp->f_dirblbuf; 1163 1164 DPRINTF("ntfs_ntreaddir: rdbuf: %p, blsize: %u\n", rdbuf, blsize); 1165 1166 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) { 1167 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 1168 0, &bmvap); 1169 if (error) { 1170 error = ENOTDIR; 1171 goto fail; 1172 } 1173 bmp = malloc(bmvap->va_datalen, M_TEMP, M_WAITOK); 1174 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0, 1175 bmvap->va_datalen, bmp, NULL); 1176 if (error) 1177 goto fail; 1178 1179 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30", 1180 0, &iavap); 1181 if (error) { 1182 error = ENOTDIR; 1183 goto fail; 1184 } 1185 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1); 1186 DPRINTF("ntfs_ntreaddir: indexalloc: %llu, cpbl: %u\n", 1187 iavap->va_datalen, cpbl); 1188 } else { 1189 DPRINTF("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"); 1190 iavap = bmvap = NULL; 1191 bmp = NULL; 1192 } 1193 1194 /* Try use previous values */ 1195 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) { 1196 attrnum = fp->f_lastdattr; 1197 aoff = fp->f_lastdoff; 1198 blnum = fp->f_lastdblnum; 1199 cnum = fp->f_lastdnum; 1200 } else { 1201 attrnum = NTFS_A_INDXROOT; 1202 aoff = sizeof(struct attr_indexroot); 1203 blnum = 0; 1204 cnum = 0; 1205 } 1206 1207 do { 1208 DPRINTF("ntfs_ntreaddir: scan: 0x%x, %u, %u, %u, %u\n", 1209 attrnum, blnum, cnum, num, aoff); 1210 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize; 1211 error = ntfs_readattr(ntmp, ip, attrnum, "$I30", 1212 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL); 1213 if (error) 1214 goto fail; 1215 1216 if (attrnum == NTFS_A_INDX) { 1217 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1218 rdbuf, rdsize); 1219 if (error) 1220 goto fail; 1221 } 1222 if (aoff == 0) 1223 aoff = (attrnum == NTFS_A_INDX) ? 1224 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) : 1225 sizeof(struct attr_indexroot); 1226 1227 iep = (struct attr_indexentry *) (rdbuf + aoff); 1228 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff); 1229 aoff += iep->reclen, 1230 iep = (struct attr_indexentry *) (rdbuf + aoff)) 1231 { 1232 if (!ntfs_isnamepermitted(ntmp, iep)) continue; 1233 1234 if (cnum >= num) { 1235 fp->f_lastdnum = cnum; 1236 fp->f_lastdoff = aoff; 1237 fp->f_lastdblnum = blnum; 1238 fp->f_lastdattr = attrnum; 1239 1240 *riepp = iep; 1241 1242 error = 0; 1243 goto fail; 1244 } 1245 cnum++; 1246 } 1247 1248 if (iavap) { 1249 if (attrnum == NTFS_A_INDXROOT) 1250 blnum = 0; 1251 else 1252 blnum++; 1253 1254 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) { 1255 if (bmp[blnum >> 3] & (1 << (blnum & 7))) 1256 break; 1257 blnum++; 1258 } 1259 1260 attrnum = NTFS_A_INDX; 1261 aoff = 0; 1262 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen) 1263 break; 1264 DPRINTF("ntfs_ntreaddir: blnum: %u\n", blnum); 1265 } 1266 } while (iavap); 1267 1268 *riepp = NULL; 1269 fp->f_lastdnum = 0; 1270 1271 fail: 1272 if (vap) 1273 ntfs_ntvattrrele(vap); 1274 if (bmvap) 1275 ntfs_ntvattrrele(bmvap); 1276 if (iavap) 1277 ntfs_ntvattrrele(iavap); 1278 if (bmp) 1279 free(bmp, M_TEMP, 0); 1280 ntfs_ntput(ip); 1281 1282 return (error); 1283 } 1284 1285 /* 1286 * Convert NTFS times that are in 100 ns units and begins from 1287 * 1601 Jan 1 into unix times. 1288 */ 1289 struct timespec 1290 ntfs_nttimetounix(u_int64_t nt) 1291 { 1292 struct timespec t; 1293 1294 /* Windows NT times are in 100 ns and from 1601 Jan 1 */ 1295 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100; 1296 t.tv_sec = nt / (1000 * 1000 * 10) - 1297 369LL * 365LL * 24LL * 60LL * 60LL - 1298 89LL * 1LL * 24LL * 60LL * 60LL; 1299 return (t); 1300 } 1301 1302 /* 1303 * Get file sizes from corresponding attribute. 1304 * 1305 * ntnode under fnode should be locked. 1306 */ 1307 int 1308 ntfs_filesize(struct ntfsmount *ntmp, struct fnode *fp, u_int64_t *size, 1309 u_int64_t *bytes) 1310 { 1311 struct ntvattr *vap; 1312 struct ntnode *ip = FTONT(fp); 1313 u_int64_t sz, bn; 1314 int error; 1315 1316 DPRINTF("ntfs_filesize: ino: %u\n", ip->i_number); 1317 1318 error = ntfs_ntvattrget(ntmp, ip, 1319 fp->f_attrtype, fp->f_attrname, 0, &vap); 1320 if (error) 1321 return (error); 1322 1323 bn = vap->va_allocated; 1324 sz = vap->va_datalen; 1325 1326 DPRINTF("ntfs_filesize: %llu bytes (%llu bytes allocated)\n", sz, bn); 1327 1328 if (size) 1329 *size = sz; 1330 if (bytes) 1331 *bytes = bn; 1332 1333 ntfs_ntvattrrele(vap); 1334 1335 return (0); 1336 } 1337 1338 /* 1339 * This is one of the read routines. 1340 * 1341 * ntnode should be locked. 1342 */ 1343 int 1344 ntfs_readntvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip, 1345 struct ntvattr *vap, off_t roff, size_t rsize, void *rdata, size_t *initp, 1346 struct uio *uio) 1347 { 1348 int error = 0; 1349 off_t off; 1350 1351 *initp = 0; 1352 if (vap->va_flag & NTFS_AF_INRUN) { 1353 int cnt; 1354 cn_t ccn, ccl, cn, cl; 1355 caddr_t data = rdata; 1356 struct buf *bp; 1357 size_t left, tocopy; 1358 1359 DDPRINTF("ntfs_readntvattr_plain: data in run: %lu chains\n", 1360 vap->va_vruncnt); 1361 1362 off = roff; 1363 left = rsize; 1364 ccl = 0; 1365 ccn = 0; 1366 cnt = 0; 1367 while (left && (cnt < vap->va_vruncnt)) { 1368 ccn = vap->va_vruncn[cnt]; 1369 ccl = vap->va_vruncl[cnt]; 1370 1371 DDPRINTF("ntfs_readntvattr_plain: left %zu, " 1372 "cn: 0x%llx, cl: %llu, off: %lld\n", 1373 left, ccn, ccl, off); 1374 1375 if (ntfs_cntob(ccl) < off) { 1376 off -= ntfs_cntob(ccl); 1377 cnt++; 1378 continue; 1379 } 1380 if (ccn || ip->i_number == NTFS_BOOTINO) { 1381 ccl -= ntfs_btocn(off); 1382 cn = ccn + ntfs_btocn(off); 1383 off = ntfs_btocnoff(off); 1384 1385 while (left && ccl) { 1386 /* 1387 * Always read single clusters at a 1388 * time - we need to avoid reading 1389 * differently-sized blocks at the 1390 * same disk offsets to avoid 1391 * confusing the buffer cache. 1392 */ 1393 tocopy = MIN(left, 1394 ntfs_cntob(1) - off); 1395 cl = ntfs_btocl(tocopy + off); 1396 KASSERT(cl == 1 && 1397 tocopy <= ntfs_cntob(1)); 1398 1399 DDPRINTF("ntfs_readntvattr_plain: " 1400 "read: cn: 0x%llx cl: %llu, " 1401 "off: %lld, len: %zu, " 1402 "left: %zu\n", 1403 cn, cl, off, tocopy, left); 1404 error = bread(ntmp->ntm_devvp, 1405 ntfs_cntobn(cn), 1406 ntfs_cntob(cl), 1407 &bp); 1408 if (error) { 1409 brelse(bp); 1410 return (error); 1411 } 1412 if (uio) { 1413 error = uiomove(bp->b_data + off, 1414 tocopy, uio); 1415 if (error != 0) 1416 break; 1417 } else { 1418 memcpy(data, bp->b_data + off, 1419 tocopy); 1420 } 1421 brelse(bp); 1422 data = data + tocopy; 1423 *initp += tocopy; 1424 off = 0; 1425 left -= tocopy; 1426 cn += cl; 1427 ccl -= cl; 1428 } 1429 } else { 1430 tocopy = MIN(left, ntfs_cntob(ccl) - off); 1431 DDPRINTF("ntfs_readntvattr_plain: hole: " 1432 "ccn: 0x%llx ccl: %llu, off: %lld, " 1433 "len: %zu, left: %zu\n", 1434 ccn, ccl, off, tocopy, left); 1435 left -= tocopy; 1436 off = 0; 1437 if (uio) { 1438 size_t remains = tocopy; 1439 for(; remains; remains--) { 1440 error = uiomove("", 1, uio); 1441 if (error != 0) 1442 break; 1443 } 1444 } else 1445 bzero(data, tocopy); 1446 data = data + tocopy; 1447 } 1448 cnt++; 1449 if (error != 0) 1450 break; 1451 } 1452 if (left && error == 0) { 1453 printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n"); 1454 error = E2BIG; 1455 } 1456 } else { 1457 DDPRINTF("ntfs_readnvattr_plain: data is in mft record\n"); 1458 if (uio) 1459 error = uiomove(vap->va_datap + roff, rsize, uio); 1460 else 1461 memcpy(rdata, vap->va_datap + roff, rsize); 1462 *initp += rsize; 1463 } 1464 1465 return (error); 1466 } 1467 1468 /* 1469 * This is one of read routines. 1470 */ 1471 int 1472 ntfs_readattr_plain(struct ntfsmount *ntmp, struct ntnode *ip, 1473 u_int32_t attrnum, char *attrname, off_t roff, size_t rsize, void *rdata, 1474 size_t *initp, struct uio *uio) 1475 { 1476 size_t init; 1477 int error = 0; 1478 off_t off = roff; 1479 size_t left = rsize, toread; 1480 caddr_t data = rdata; 1481 struct ntvattr *vap; 1482 *initp = 0; 1483 1484 while (left) { 1485 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 1486 ntfs_btocn(off), &vap); 1487 if (error) 1488 return (error); 1489 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off); 1490 DDPRINTF("ntfs_readattr_plain: o: %lld, s: %zu " 1491 "(%llu - %llu)\n", off, toread, 1492 vap->va_vcnstart, vap->va_vcnend); 1493 error = ntfs_readntvattr_plain(ntmp, ip, vap, 1494 off - ntfs_cntob(vap->va_vcnstart), 1495 toread, data, &init, uio); 1496 if (error) { 1497 printf("ntfs_readattr_plain: ntfs_readntvattr_plain " 1498 "failed: o: %lld, s: %zu\n", off, toread); 1499 printf("ntfs_readattr_plain: attrib: %llu - %llu\n", 1500 vap->va_vcnstart, vap->va_vcnend); 1501 ntfs_ntvattrrele(vap); 1502 break; 1503 } 1504 ntfs_ntvattrrele(vap); 1505 left -= toread; 1506 off += toread; 1507 data = data + toread; 1508 *initp += init; 1509 } 1510 1511 return (error); 1512 } 1513 1514 /* 1515 * This is one of read routines. 1516 */ 1517 int 1518 ntfs_readattr(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t attrnum, 1519 char *attrname, off_t roff, size_t rsize, void *rdata, struct uio *uio) 1520 { 1521 int error = 0; 1522 struct ntvattr *vap; 1523 size_t init; 1524 1525 DDPRINTF("ntfs_readattr: reading %u: 0x%x, from %lld size %zu bytes\n", 1526 ip->i_number, attrnum, roff, rsize); 1527 1528 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap); 1529 if (error) 1530 return (error); 1531 1532 if ((roff > vap->va_datalen) || 1533 (roff + rsize > vap->va_datalen)) { 1534 printf("ntfs_readattr: offset too big: %lld (%lld) > %llu\n", 1535 roff, roff + rsize, vap->va_datalen); 1536 ntfs_ntvattrrele(vap); 1537 return (E2BIG); 1538 } 1539 if (vap->va_compression && vap->va_compressalg) { 1540 u_int8_t *cup; 1541 u_int8_t *uup; 1542 off_t off = roff; 1543 caddr_t data = rdata; 1544 cn_t cn; 1545 size_t left = rsize, tocopy; 1546 1547 DDPRINTF("ntfs_ntreadattr: compression: %u\n", 1548 vap->va_compressalg); 1549 1550 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL), M_NTFSDECOMP, 1551 M_WAITOK); 1552 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL), M_NTFSDECOMP, 1553 M_WAITOK); 1554 1555 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1)); 1556 off = roff - ntfs_cntob(cn); 1557 1558 while (left) { 1559 error = ntfs_readattr_plain(ntmp, ip, attrnum, 1560 attrname, ntfs_cntob(cn), 1561 ntfs_cntob(NTFS_COMPUNIT_CL), 1562 cup, &init, NULL); 1563 if (error) 1564 break; 1565 1566 tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off); 1567 1568 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) { 1569 if (uio) 1570 error = uiomove(cup + off, tocopy, uio); 1571 else 1572 memcpy(data, cup + off, tocopy); 1573 } else if (init == 0) { 1574 if (uio) { 1575 size_t remains = tocopy; 1576 for(; remains; remains--) { 1577 error = uiomove("", 1, uio); 1578 if (error != 0) 1579 break; 1580 } 1581 } 1582 else 1583 bzero(data, tocopy); 1584 } else { 1585 error = ntfs_uncompunit(ntmp, uup, cup); 1586 if (error) 1587 break; 1588 if (uio) 1589 error = uiomove(uup + off, tocopy, uio); 1590 else 1591 memcpy(data, uup + off, tocopy); 1592 } 1593 if (error) 1594 break; 1595 1596 left -= tocopy; 1597 data = data + tocopy; 1598 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL); 1599 cn += NTFS_COMPUNIT_CL; 1600 } 1601 1602 free(uup, M_NTFSDECOMP, 0); 1603 free(cup, M_NTFSDECOMP, 0); 1604 } else 1605 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname, 1606 roff, rsize, rdata, &init, uio); 1607 ntfs_ntvattrrele(vap); 1608 return (error); 1609 } 1610 1611 #if UNUSED_CODE 1612 int 1613 ntfs_parserun(cn_t *cn, cn_t *cl, u_int8_t *run, u_long len, u_long *off) 1614 { 1615 u_int8_t sz; 1616 int i; 1617 1618 if (NULL == run) { 1619 printf("ntfs_parsetun: run == NULL\n"); 1620 return (EINVAL); 1621 } 1622 sz = run[(*off)++]; 1623 if (0 == sz) { 1624 printf("ntfs_parserun: trying to go out of run\n"); 1625 return (E2BIG); 1626 } 1627 *cl = 0; 1628 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) { 1629 printf("ntfs_parserun: " \ 1630 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n", 1631 sz, len, *off); 1632 return (EINVAL); 1633 } 1634 for (i = 0; i < (sz & 0xF); i++) 1635 *cl += (u_int32_t) run[(*off)++] << (i << 3); 1636 1637 sz >>= 4; 1638 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) { 1639 printf("ntfs_parserun: " \ 1640 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n", 1641 sz, len, *off); 1642 return (EINVAL); 1643 } 1644 for (i = 0; i < (sz & 0xF); i++) 1645 *cn += (u_int32_t) run[(*off)++] << (i << 3); 1646 1647 return (0); 1648 } 1649 #endif 1650 1651 /* 1652 * Process fixup routine on given buffer. 1653 */ 1654 int 1655 ntfs_procfixups(struct ntfsmount *ntmp, u_int32_t magic, caddr_t buf, 1656 size_t len) 1657 { 1658 struct fixuphdr *fhp = (struct fixuphdr *) buf; 1659 int i; 1660 u_int16_t fixup; 1661 u_int16_t *fxp; 1662 u_int16_t *cfxp; 1663 1664 if (fhp->fh_magic != magic) { 1665 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n", 1666 fhp->fh_magic, magic); 1667 return (EINVAL); 1668 } 1669 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) { 1670 printf("ntfs_procfixups: " \ 1671 "bad fixups number: %d for %ld bytes block\n", 1672 fhp->fh_fnum, (long)len); /* XXX printf kludge */ 1673 return (EINVAL); 1674 } 1675 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) { 1676 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff); 1677 return (EINVAL); 1678 } 1679 fxp = (u_int16_t *) (buf + fhp->fh_foff); 1680 cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2); 1681 fixup = *fxp++; 1682 for (i = 1; i < fhp->fh_fnum; i++, fxp++) { 1683 if (*cfxp != fixup) { 1684 printf("ntfs_procfixups: fixup %d doesn't match\n", i); 1685 return (EINVAL); 1686 } 1687 *cfxp = *fxp; 1688 cfxp = (u_int16_t *)((caddr_t)cfxp + ntmp->ntm_bps); 1689 } 1690 return (0); 1691 } 1692 1693 #if UNUSED_CODE 1694 int 1695 ntfs_runtocn(cn_t *cn, struct ntfsmount *ntmp, u_int8_t *run, u_long len, 1696 cn_t vcn) 1697 { 1698 cn_t ccn = 0; 1699 cn_t ccl = 0; 1700 u_long off = 0; 1701 int error = 0; 1702 1703 #if NTFS_DEBUG 1704 int i; 1705 printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n", 1706 run, len, (u_long) vcn); 1707 printf("ntfs_runtocn: run: "); 1708 for (i = 0; i < len; i++) 1709 printf("0x%02x ", run[i]); 1710 printf("\n"); 1711 #endif 1712 1713 if (NULL == run) { 1714 printf("ntfs_runtocn: run == NULL\n"); 1715 return (EINVAL); 1716 } 1717 do { 1718 if (run[off] == 0) { 1719 printf("ntfs_runtocn: vcn too big\n"); 1720 return (E2BIG); 1721 } 1722 vcn -= ccl; 1723 error = ntfs_parserun(&ccn, &ccl, run, len, &off); 1724 if (error) { 1725 printf("ntfs_runtocn: ntfs_parserun failed\n"); 1726 return (error); 1727 } 1728 } while (ccl <= vcn); 1729 *cn = ccn + vcn; 1730 return (0); 1731 } 1732 #endif 1733 1734 /* 1735 * if the ntfs_toupper_tab[] is filled already, just raise use count; 1736 * otherwise read the data from the filesystem we are currently mounting 1737 */ 1738 int 1739 ntfs_toupper_use(struct mount *mp, struct ntfsmount *ntmp, struct proc *p) 1740 { 1741 int error = 0; 1742 struct vnode *vp; 1743 1744 /* get exclusive access */ 1745 rw_enter_write(&ntfs_toupper_lock); 1746 1747 /* only read the translation data from a file if it hasn't been 1748 * read already */ 1749 if (ntfs_toupper_tab) 1750 goto out; 1751 1752 /* 1753 * Read in Unicode lowercase -> uppercase translation file. 1754 * XXX for now, just the first 256 entries are used anyway, 1755 * so don't bother reading more 1756 */ 1757 ntfs_toupper_tab = malloc(256 * 256 * sizeof(wchar), M_NTFSRDATA, 1758 M_WAITOK); 1759 1760 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp))) 1761 goto out; 1762 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 1763 0, 256*256*sizeof(wchar), (char *) ntfs_toupper_tab, 1764 NULL); 1765 vput(vp); 1766 1767 out: 1768 ntfs_toupper_usecount++; 1769 rw_exit_write(&ntfs_toupper_lock); 1770 return (error); 1771 } 1772 1773 /* 1774 * lower the use count and if it reaches zero, free the memory 1775 * tied by toupper table 1776 */ 1777 void 1778 ntfs_toupper_unuse(struct proc *p) 1779 { 1780 /* get exclusive access */ 1781 rw_enter_write(&ntfs_toupper_lock); 1782 1783 ntfs_toupper_usecount--; 1784 if (ntfs_toupper_usecount == 0) { 1785 free(ntfs_toupper_tab, M_NTFSRDATA, 0); 1786 ntfs_toupper_tab = NULL; 1787 } 1788 #ifdef DIAGNOSTIC 1789 else if (ntfs_toupper_usecount < 0) { 1790 panic("ntfs_toupper_unuse(): use count negative: %d", 1791 ntfs_toupper_usecount); 1792 } 1793 #endif 1794 1795 /* release the lock */ 1796 rw_exit_write(&ntfs_toupper_lock); 1797 } 1798