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sys/ntfs/ntfs_subr.c
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1 /* $OpenBSD: ntfs_subr.c,v 1.52 2022/01/11 03:13:59 jsg 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 do { 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 } while (rw_enter(&ntfs_hashlock, RW_WRITE | RW_SLEEPFAIL)); 400 401 ip = malloc(sizeof(*ip), M_NTFSNTNODE, M_WAITOK | M_ZERO); 402 DDPRINTF("ntfs_ntlookup: allocating ntnode: %u: %p\n", ino, ip); 403 404 /* Generic initialization */ 405 ip->i_devvp = ntmp->ntm_devvp; 406 ip->i_dev = ntmp->ntm_dev; 407 ip->i_number = ino; 408 ip->i_mp = ntmp; 409 410 LIST_INIT(&ip->i_fnlist); 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 ntfs_nthashins(ip); 418 419 rw_exit(&ntfs_hashlock); 420 421 *ipp = ip; 422 423 DPRINTF("ntfs_ntlookup: ntnode %u: %p, usecount: %d\n", 424 ino, ip, ip->i_usecount); 425 426 return (0); 427 } 428 429 /* 430 * Decrement usecount of ntnode and unlock it, if usecount reach zero, 431 * deallocate ntnode. 432 * 433 * ntnode should be locked on entry, and unlocked on return. 434 */ 435 void 436 ntfs_ntput(struct ntnode *ip) 437 { 438 struct ntfsmount *ntmp = ip->i_mp; 439 struct ntvattr *vap; 440 441 DPRINTF("ntfs_ntput: rele ntnode %u: %p, usecount: %d\n", 442 ip->i_number, ip, ip->i_usecount); 443 444 ip->i_usecount--; 445 446 #ifdef DIAGNOSTIC 447 if (ip->i_usecount < 0) { 448 panic("ntfs_ntput: ino: %d usecount: %d ", 449 ip->i_number,ip->i_usecount); 450 } 451 #endif 452 453 if (ip->i_usecount > 0) { 454 rw_exit_write(&ip->i_lock); 455 return; 456 } 457 458 DPRINTF("ntfs_ntput: deallocating ntnode: %u\n", ip->i_number); 459 460 if (LIST_FIRST(&ip->i_fnlist)) 461 panic("ntfs_ntput: ntnode has fnodes"); 462 463 ntfs_nthashrem(ip); 464 465 /* Remove from loaded list. */ 466 if (ip->i_flag & IN_LOADED) { 467 TAILQ_REMOVE(&ntmp->ntm_ntnodeq, ip, i_loaded); 468 ntmp->ntm_ntnodes--; 469 } 470 471 while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) { 472 LIST_REMOVE(vap, va_list); 473 ntfs_freentvattr(vap); 474 } 475 476 vrele(ip->i_devvp); 477 free(ip, M_NTFSNTNODE, 0); 478 } 479 480 /* 481 * increment usecount of ntnode 482 */ 483 void 484 ntfs_ntref(struct ntnode *ip) 485 { 486 ip->i_usecount++; 487 488 DPRINTF("ntfs_ntref: ino %u, usecount: %d\n", 489 ip->i_number, ip->i_usecount); 490 } 491 492 /* 493 * Decrement usecount of ntnode. 494 */ 495 void 496 ntfs_ntrele(struct ntnode *ip) 497 { 498 DPRINTF("ntfs_ntrele: rele ntnode %u: %p, usecount: %d\n", 499 ip->i_number, ip, ip->i_usecount); 500 501 ip->i_usecount--; 502 503 if (ip->i_usecount < 0) 504 panic("ntfs_ntrele: ino: %d usecount: %d ", 505 ip->i_number,ip->i_usecount); 506 } 507 508 /* 509 * Deallocate all memory allocated for ntvattr 510 */ 511 void 512 ntfs_freentvattr(struct ntvattr *vap) 513 { 514 if (vap->va_flag & NTFS_AF_INRUN) { 515 if (vap->va_vruncn) 516 free(vap->va_vruncn, M_NTFSRUN, 0); 517 if (vap->va_vruncl) 518 free(vap->va_vruncl, M_NTFSRUN, 0); 519 } else { 520 if (vap->va_datap) 521 free(vap->va_datap, M_NTFSRDATA, 0); 522 } 523 free(vap, M_NTFSNTVATTR, 0); 524 } 525 526 /* 527 * Convert disk image of attribute into ntvattr structure, 528 * runs are expanded also. 529 */ 530 int 531 ntfs_attrtontvattr(struct ntfsmount *ntmp, struct ntvattr **rvapp, 532 struct attr *rap) 533 { 534 int error, i; 535 struct ntvattr *vap; 536 537 error = 0; 538 *rvapp = NULL; 539 540 vap = malloc(sizeof(*vap), M_NTFSNTVATTR, M_WAITOK | M_ZERO); 541 vap->va_ip = NULL; 542 vap->va_flag = rap->a_hdr.a_flag; 543 vap->va_type = rap->a_hdr.a_type; 544 vap->va_compression = rap->a_hdr.a_compression; 545 vap->va_index = rap->a_hdr.a_index; 546 547 DDPRINTF("type: 0x%x, index: %u", vap->va_type, vap->va_index); 548 549 vap->va_namelen = rap->a_hdr.a_namelen; 550 if (rap->a_hdr.a_namelen) { 551 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff); 552 DDPRINTF(", name:["); 553 for (i = 0; i < vap->va_namelen; i++) { 554 vap->va_name[i] = unp[i]; 555 DDPRINTF("%c", vap->va_name[i]); 556 } 557 DDPRINTF("]"); 558 } 559 if (vap->va_flag & NTFS_AF_INRUN) { 560 DDPRINTF(", nonres."); 561 vap->va_datalen = rap->a_nr.a_datalen; 562 vap->va_allocated = rap->a_nr.a_allocated; 563 vap->va_vcnstart = rap->a_nr.a_vcnstart; 564 vap->va_vcnend = rap->a_nr.a_vcnend; 565 vap->va_compressalg = rap->a_nr.a_compressalg; 566 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl), 567 &(vap->va_vruncnt), 568 (caddr_t) rap + rap->a_nr.a_dataoff); 569 } else { 570 vap->va_compressalg = 0; 571 DDPRINTF(", res."); 572 vap->va_datalen = rap->a_r.a_datalen; 573 vap->va_allocated = rap->a_r.a_datalen; 574 vap->va_vcnstart = 0; 575 vap->va_vcnend = ntfs_btocn(vap->va_allocated); 576 vap->va_datap = malloc(vap->va_datalen, M_NTFSRDATA, M_WAITOK); 577 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff, 578 rap->a_r.a_datalen); 579 } 580 DDPRINTF(", len: %llu", vap->va_datalen); 581 582 if (error) 583 free(vap, M_NTFSNTVATTR, 0); 584 else 585 *rvapp = vap; 586 587 DDPRINTF("\n"); 588 589 return (error); 590 } 591 592 /* 593 * Expand run into more utilizable and more memory eating format. 594 */ 595 int 596 ntfs_runtovrun(cn_t **rcnp, cn_t **rclp, u_long *rcntp, u_int8_t *run) 597 { 598 u_int32_t off; 599 u_int32_t sz, i; 600 cn_t *cn; 601 cn_t *cl; 602 u_long cnt; 603 cn_t prev; 604 cn_t tmp; 605 606 off = 0; 607 cnt = 0; 608 while (run[off]) { 609 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1; 610 cnt++; 611 } 612 cn = mallocarray(cnt, sizeof(cn_t), M_NTFSRUN, M_WAITOK); 613 cl = mallocarray(cnt, sizeof(cn_t), M_NTFSRUN, M_WAITOK); 614 615 off = 0; 616 cnt = 0; 617 prev = 0; 618 while (run[off]) { 619 620 sz = run[off++]; 621 cl[cnt] = 0; 622 623 for (i = 0; i < (sz & 0xF); i++) 624 cl[cnt] += (u_int32_t) run[off++] << (i << 3); 625 626 sz >>= 4; 627 if (run[off + sz - 1] & 0x80) { 628 tmp = ((u_int64_t) - 1) << (sz << 3); 629 for (i = 0; i < sz; i++) 630 tmp |= (u_int64_t) run[off++] << (i << 3); 631 } else { 632 tmp = 0; 633 for (i = 0; i < sz; i++) 634 tmp |= (u_int64_t) run[off++] << (i << 3); 635 } 636 if (tmp) 637 prev = cn[cnt] = prev + tmp; 638 else 639 cn[cnt] = tmp; 640 641 cnt++; 642 } 643 *rcnp = cn; 644 *rclp = cl; 645 *rcntp = cnt; 646 return (0); 647 } 648 649 /* 650 * Compare unicode and ascii string case insens. 651 */ 652 int 653 ntfs_uastricmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen, 654 const char *astr, size_t astrlen) 655 { 656 size_t i; 657 int res; 658 const char *astrend = astr + astrlen; 659 660 for (i = 0; i < ustrlen && astr < astrend; i++) { 661 res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i]), 662 NTFS_TOUPPER((*ntmp->ntm_wget)(&astr)) ); 663 if (res) 664 return res; 665 } 666 667 if (i == ustrlen && astr == astrend) 668 return 0; 669 else if (i == ustrlen) 670 return -1; 671 else 672 return 1; 673 } 674 675 /* 676 * Compare unicode and ascii string case sens. 677 */ 678 int 679 ntfs_uastrcmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen, 680 const char *astr, size_t astrlen) 681 { 682 size_t i; 683 int res; 684 const char *astrend = astr + astrlen; 685 686 for (i = 0; (i < ustrlen) && (astr < astrend); i++) { 687 res = (*ntmp->ntm_wcmp)(ustr[i], (*ntmp->ntm_wget)(&astr)); 688 if (res) 689 return res; 690 } 691 692 if (i == ustrlen && astr == astrend) 693 return 0; 694 else if (i == ustrlen) 695 return -1; 696 else 697 return 1; 698 } 699 700 /* 701 * Search fnode in ntnode, if not found allocate and preinitialize. 702 * 703 * ntnode should be locked on entry. 704 */ 705 int 706 ntfs_fget(struct ntfsmount *ntmp, struct ntnode *ip, int attrtype, 707 char *attrname, struct fnode **fpp) 708 { 709 struct fnode *fp; 710 711 DPRINTF("ntfs_fget: ino: %u, attrtype: 0x%x, attrname: %s\n", 712 ip->i_number, attrtype, attrname ? attrname : ""); 713 *fpp = NULL; 714 LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist) { 715 DPRINTF("ntfs_fget: fnode: attrtype: %u, attrname: %s\n", 716 fp->f_attrtype, fp->f_attrname ? fp->f_attrname : ""); 717 718 if ((attrtype == fp->f_attrtype) && 719 ((!attrname && !fp->f_attrname) || 720 (attrname && fp->f_attrname && 721 !strcmp(attrname,fp->f_attrname)))){ 722 DPRINTF("ntfs_fget: found existed: %p\n", fp); 723 *fpp = fp; 724 } 725 } 726 727 if (*fpp) 728 return (0); 729 730 fp = malloc(sizeof(*fp), M_NTFSFNODE, M_WAITOK | M_ZERO); 731 DPRINTF("ntfs_fget: allocating fnode: %p\n", fp); 732 733 fp->f_ip = ip; 734 fp->f_attrname = attrname; 735 if (fp->f_attrname) fp->f_flag |= FN_AATTRNAME; 736 fp->f_attrtype = attrtype; 737 738 ntfs_ntref(ip); 739 740 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist); 741 742 *fpp = fp; 743 744 return (0); 745 } 746 747 /* 748 * Deallocate fnode, remove it from ntnode's fnode list. 749 * 750 * ntnode should be locked. 751 */ 752 void 753 ntfs_frele(struct fnode *fp) 754 { 755 struct ntnode *ip = FTONT(fp); 756 757 DPRINTF("ntfs_frele: fnode: %p for %u: %p\n", fp, ip->i_number, ip); 758 759 DPRINTF("ntfs_frele: deallocating fnode\n"); 760 LIST_REMOVE(fp,f_fnlist); 761 if (fp->f_flag & FN_AATTRNAME) 762 free(fp->f_attrname, M_TEMP, 0); 763 if (fp->f_dirblbuf) 764 free(fp->f_dirblbuf, M_NTFSDIR, 0); 765 free(fp, M_NTFSFNODE, 0); 766 ntfs_ntrele(ip); 767 } 768 769 /* 770 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 771 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs. 772 * If $ATTR_TYPE not specified, ATTR_A_DATA assumed. 773 */ 774 int 775 ntfs_ntlookupattr(struct ntfsmount *ntmp, const char *name, int namelen, 776 int *attrtype, char **attrname) 777 { 778 const char *sys; 779 size_t syslen, i; 780 struct ntvattrdef *adp; 781 782 if (namelen == 0) 783 return (0); 784 785 if (name[0] == '$') { 786 sys = name; 787 for (syslen = 0; syslen < namelen; syslen++) { 788 if(sys[syslen] == ':') { 789 name++; 790 namelen--; 791 break; 792 } 793 } 794 name += syslen; 795 namelen -= syslen; 796 797 adp = ntmp->ntm_ad; 798 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){ 799 if (syslen != adp->ad_namelen || 800 strncmp(sys, adp->ad_name, syslen) != 0) 801 continue; 802 803 *attrtype = adp->ad_type; 804 goto out; 805 } 806 return (ENOENT); 807 } 808 809 out: 810 if (namelen) { 811 *attrname = malloc(namelen + 1, M_TEMP, M_WAITOK); 812 memcpy(*attrname, name, namelen); 813 (*attrname)[namelen] = '\0'; 814 *attrtype = NTFS_A_DATA; 815 } 816 817 return (0); 818 } 819 820 /* 821 * Lookup specified node for filename, matching cnp, return fnode filled. 822 */ 823 int 824 ntfs_ntlookupfile(struct ntfsmount *ntmp, struct vnode *vp, 825 struct componentname *cnp, struct vnode **vpp) 826 { 827 struct fnode *fp = VTOF(vp); 828 struct ntnode *ip = FTONT(fp); 829 struct ntvattr *vap = NULL; /* Root attribute */ 830 cn_t cn = 0; /* VCN in current attribute */ 831 caddr_t rdbuf = NULL; /* Buffer to read directory's blocks */ 832 u_int32_t blsize; 833 u_int32_t rdsize; /* Length of data to read from current block */ 834 struct attr_indexentry *iep; 835 int error, res, anamelen, fnamelen; 836 const char *fname,*aname; 837 u_int32_t aoff; 838 int attrtype = NTFS_A_DATA; 839 char *attrname = NULL; 840 struct fnode *nfp; 841 struct vnode *nvp; 842 enum vtype f_type; 843 int fullscan = 0; 844 struct ntfs_lookup_ctx *lookup_ctx = NULL, *tctx; 845 846 error = ntfs_ntget(ip); 847 if (error) 848 return (error); 849 850 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap); 851 if (error || (vap->va_flag & NTFS_AF_INRUN)) { 852 error = ENOTDIR; 853 goto fail; 854 } 855 856 /* 857 * Divide file name into: foofilefoofilefoofile[:attrspec] 858 * Store like this: fname:fnamelen [aname:anamelen] 859 */ 860 fname = cnp->cn_nameptr; 861 aname = NULL; 862 anamelen = 0; 863 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++) 864 if(fname[fnamelen] == ':') { 865 aname = fname + fnamelen + 1; 866 anamelen = cnp->cn_namelen - fnamelen - 1; 867 DPRINTF("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n", 868 fname, fnamelen, aname, anamelen); 869 break; 870 } 871 872 blsize = vap->va_a_iroot->ir_size; 873 DPRINTF("ntfs_ntlookupfile: blksz: %u\n", blsize); 874 875 rdbuf = malloc(blsize, M_TEMP, M_WAITOK); 876 877 loop: 878 rdsize = vap->va_datalen; 879 DPRINTF("ntfs_ntlookupfile: rdsz: %u\n", rdsize); 880 881 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30", 882 0, rdsize, rdbuf, NULL); 883 if (error) 884 goto fail; 885 886 aoff = sizeof(struct attr_indexroot); 887 888 do { 889 iep = (struct attr_indexentry *) (rdbuf + aoff); 890 891 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff); 892 aoff += iep->reclen, 893 iep = (struct attr_indexentry *) (rdbuf + aoff)) 894 { 895 DDPRINTF("scan: %u, %u\n", iep->ie_number, 896 iep->ie_fnametype); 897 898 /* check the name - the case-insensitive check 899 * has to come first, to break from this for loop 900 * if needed, so we can dive correctly */ 901 res = ntfs_uastricmp(ntmp, iep->ie_fname, 902 iep->ie_fnamelen, fname, fnamelen); 903 if (!fullscan) { 904 if (res > 0) break; 905 if (res < 0) continue; 906 } 907 908 if (iep->ie_fnametype == 0 || 909 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS)) 910 { 911 res = ntfs_uastrcmp(ntmp, iep->ie_fname, 912 iep->ie_fnamelen, fname, fnamelen); 913 if (res != 0 && !fullscan) continue; 914 } 915 916 /* if we perform full scan, the file does not match 917 * and this is subnode, dive */ 918 if (fullscan && res != 0) { 919 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) { 920 tctx = malloc(sizeof(struct ntfs_lookup_ctx), 921 M_TEMP, M_WAITOK); 922 tctx->aoff = aoff + iep->reclen; 923 tctx->rdsize = rdsize; 924 tctx->cn = cn; 925 tctx->prev = lookup_ctx; 926 lookup_ctx = tctx; 927 break; 928 } else 929 continue; 930 } 931 932 if (aname) { 933 error = ntfs_ntlookupattr(ntmp, 934 aname, anamelen, 935 &attrtype, &attrname); 936 if (error) 937 goto fail; 938 } 939 940 /* Check if we've found ourselves */ 941 if ((iep->ie_number == ip->i_number) && 942 (attrtype == fp->f_attrtype) && 943 ((!attrname && !fp->f_attrname) || 944 (attrname && fp->f_attrname && 945 !strcmp(attrname, fp->f_attrname)))) 946 { 947 vref(vp); 948 *vpp = vp; 949 error = 0; 950 goto fail; 951 } 952 953 /* free the buffer returned by ntfs_ntlookupattr() */ 954 if (attrname) { 955 free(attrname, M_TEMP, 0); 956 attrname = NULL; 957 } 958 959 /* vget node, but don't load it */ 960 error = ntfs_vgetex(ntmp->ntm_mountp, 961 iep->ie_number, attrtype, attrname, 962 LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN, 963 &nvp); 964 if (error) 965 goto fail; 966 967 nfp = VTOF(nvp); 968 969 if (nfp->f_flag & FN_VALID) { 970 *vpp = nvp; 971 goto fail; 972 } 973 974 nfp->f_fflag = iep->ie_fflag; 975 nfp->f_pnumber = iep->ie_fpnumber; 976 nfp->f_times = iep->ie_ftimes; 977 978 if((nfp->f_fflag & NTFS_FFLAG_DIR) && 979 (nfp->f_attrtype == NTFS_A_DATA) && 980 (nfp->f_attrname == NULL)) 981 f_type = VDIR; 982 else 983 f_type = VREG; 984 985 nvp->v_type = f_type; 986 987 if ((nfp->f_attrtype == NTFS_A_DATA) && 988 (nfp->f_attrname == NULL)) 989 { 990 /* Opening default attribute */ 991 nfp->f_size = iep->ie_fsize; 992 nfp->f_allocated = iep->ie_fallocated; 993 nfp->f_flag |= FN_PRELOADED; 994 } else { 995 error = ntfs_filesize(ntmp, nfp, 996 &nfp->f_size, &nfp->f_allocated); 997 if (error) { 998 vput(nvp); 999 goto fail; 1000 } 1001 } 1002 1003 nfp->f_flag &= ~FN_VALID; 1004 *vpp = nvp; 1005 goto fail; 1006 } 1007 1008 /* Dive if possible */ 1009 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) { 1010 DPRINTF("ntfs_ntlookupfile: diving\n"); 1011 1012 cn = *(cn_t *) (rdbuf + aoff + 1013 iep->reclen - sizeof(cn_t)); 1014 rdsize = blsize; 1015 1016 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30", 1017 ntfs_cntob(cn), rdsize, rdbuf, NULL); 1018 if (error) 1019 goto fail; 1020 1021 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1022 rdbuf, rdsize); 1023 if (error) 1024 goto fail; 1025 1026 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize + 1027 0x18); 1028 } else if (fullscan && lookup_ctx) { 1029 cn = lookup_ctx->cn; 1030 aoff = lookup_ctx->aoff; 1031 rdsize = lookup_ctx->rdsize; 1032 1033 error = ntfs_readattr(ntmp, ip, 1034 (cn == 0) ? NTFS_A_INDXROOT : NTFS_A_INDX, 1035 "$I30", ntfs_cntob(cn), rdsize, rdbuf, NULL); 1036 if (error) 1037 goto fail; 1038 1039 if (cn != 0) { 1040 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1041 rdbuf, rdsize); 1042 if (error) 1043 goto fail; 1044 } 1045 1046 tctx = lookup_ctx; 1047 lookup_ctx = lookup_ctx->prev; 1048 free(tctx, M_TEMP, 0); 1049 } else { 1050 DPRINTF("ntfs_ntlookupfile: nowhere to dive :-(\n"); 1051 error = ENOENT; 1052 break; 1053 } 1054 } while (1); 1055 1056 if (error == ENOENT) { 1057 /* perform full scan if no entry was found */ 1058 if (!fullscan) { 1059 fullscan = 1; 1060 cn = 0; /* need zero, used by lookup_ctx */ 1061 1062 DDPRINTF("ntfs_ntlookupfile: fullscan performed for: %.*s\n", 1063 (unsigned int)fnamelen, fname); 1064 goto loop; 1065 } 1066 1067 if ((cnp->cn_flags & ISLASTCN) && 1068 (cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME)) 1069 error = EJUSTRETURN; 1070 } 1071 1072 DPRINTF("finish\n"); 1073 1074 fail: 1075 if (vap) 1076 ntfs_ntvattrrele(vap); 1077 if (rdbuf) 1078 free(rdbuf, M_TEMP, 0); 1079 if (attrname) 1080 free(attrname, M_TEMP, 0); 1081 if (lookup_ctx) { 1082 while(lookup_ctx) { 1083 tctx = lookup_ctx; 1084 lookup_ctx = lookup_ctx->prev; 1085 free(tctx, M_TEMP, 0); 1086 } 1087 } 1088 ntfs_ntput(ip); 1089 return (error); 1090 } 1091 1092 /* 1093 * Check if name type is permitted to show. 1094 */ 1095 int 1096 ntfs_isnamepermitted(struct ntfsmount *ntmp, struct attr_indexentry *iep) 1097 { 1098 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES) 1099 return 1; 1100 1101 switch (iep->ie_fnametype) { 1102 case 2: 1103 DDPRINTF("ntfs_isnamepermitted: skipped DOS name\n"); 1104 return 0; 1105 case 0: case 1: case 3: 1106 return 1; 1107 default: 1108 printf("ntfs_isnamepermitted: " \ 1109 "WARNING! Unknown file name type: %d\n", 1110 iep->ie_fnametype); 1111 break; 1112 } 1113 return 0; 1114 } 1115 1116 /* 1117 * Read ntfs dir like stream of attr_indexentry, not like btree of them. 1118 * This is done by scanning $BITMAP:$I30 for busy clusters and reading them. 1119 * Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in 1120 * fnode, so we can skip toward record number num almost immediately. 1121 * Anyway this is rather slow routine. The problem is that we don't know 1122 * how many records are there in $INDEX_ALLOCATION:$I30 block. 1123 */ 1124 int 1125 ntfs_ntreaddir(struct ntfsmount *ntmp, struct fnode *fp, u_int32_t num, 1126 struct attr_indexentry **riepp, struct proc *p) 1127 { 1128 struct ntnode *ip = FTONT(fp); 1129 struct ntvattr *vap = NULL; /* IndexRoot attribute */ 1130 struct ntvattr *bmvap = NULL; /* BitMap attribute */ 1131 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */ 1132 caddr_t rdbuf; /* Buffer to read directory's blocks */ 1133 u_int8_t *bmp = NULL; /* Bitmap */ 1134 u_int32_t blsize; /* Index allocation size (2048) */ 1135 u_int32_t rdsize; /* Length of data to read */ 1136 u_int32_t attrnum; /* Current attribute type */ 1137 u_int32_t cpbl = 1; /* Clusters per directory block */ 1138 u_int32_t blnum; 1139 struct attr_indexentry *iep; 1140 int error = ENOENT; 1141 u_int32_t aoff, cnum; 1142 1143 DPRINTF("ntfs_ntreaddir: read ino: %u, num: %u\n", ip->i_number, num); 1144 error = ntfs_ntget(ip); 1145 if (error) 1146 return (error); 1147 1148 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap); 1149 if (error) { 1150 error = ENOTDIR; 1151 goto fail; 1152 } 1153 1154 if (fp->f_dirblbuf == NULL) { 1155 fp->f_dirblsz = vap->va_a_iroot->ir_size; 1156 fp->f_dirblbuf = malloc(MAX(vap->va_datalen,fp->f_dirblsz), 1157 M_NTFSDIR, M_WAITOK); 1158 } 1159 1160 blsize = fp->f_dirblsz; 1161 rdbuf = fp->f_dirblbuf; 1162 1163 DPRINTF("ntfs_ntreaddir: rdbuf: %p, blsize: %u\n", rdbuf, blsize); 1164 1165 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) { 1166 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 1167 0, &bmvap); 1168 if (error) { 1169 error = ENOTDIR; 1170 goto fail; 1171 } 1172 bmp = malloc(bmvap->va_datalen, M_TEMP, M_WAITOK); 1173 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0, 1174 bmvap->va_datalen, bmp, NULL); 1175 if (error) 1176 goto fail; 1177 1178 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30", 1179 0, &iavap); 1180 if (error) { 1181 error = ENOTDIR; 1182 goto fail; 1183 } 1184 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1); 1185 DPRINTF("ntfs_ntreaddir: indexalloc: %llu, cpbl: %u\n", 1186 iavap->va_datalen, cpbl); 1187 } else { 1188 DPRINTF("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"); 1189 iavap = bmvap = NULL; 1190 bmp = NULL; 1191 } 1192 1193 /* Try use previous values */ 1194 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) { 1195 attrnum = fp->f_lastdattr; 1196 aoff = fp->f_lastdoff; 1197 blnum = fp->f_lastdblnum; 1198 cnum = fp->f_lastdnum; 1199 } else { 1200 attrnum = NTFS_A_INDXROOT; 1201 aoff = sizeof(struct attr_indexroot); 1202 blnum = 0; 1203 cnum = 0; 1204 } 1205 1206 do { 1207 DPRINTF("ntfs_ntreaddir: scan: 0x%x, %u, %u, %u, %u\n", 1208 attrnum, blnum, cnum, num, aoff); 1209 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize; 1210 error = ntfs_readattr(ntmp, ip, attrnum, "$I30", 1211 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL); 1212 if (error) 1213 goto fail; 1214 1215 if (attrnum == NTFS_A_INDX) { 1216 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1217 rdbuf, rdsize); 1218 if (error) 1219 goto fail; 1220 } 1221 if (aoff == 0) 1222 aoff = (attrnum == NTFS_A_INDX) ? 1223 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) : 1224 sizeof(struct attr_indexroot); 1225 1226 iep = (struct attr_indexentry *) (rdbuf + aoff); 1227 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff); 1228 aoff += iep->reclen, 1229 iep = (struct attr_indexentry *) (rdbuf + aoff)) 1230 { 1231 if (!ntfs_isnamepermitted(ntmp, iep)) continue; 1232 1233 if (cnum >= num) { 1234 fp->f_lastdnum = cnum; 1235 fp->f_lastdoff = aoff; 1236 fp->f_lastdblnum = blnum; 1237 fp->f_lastdattr = attrnum; 1238 1239 *riepp = iep; 1240 1241 error = 0; 1242 goto fail; 1243 } 1244 cnum++; 1245 } 1246 1247 if (iavap) { 1248 if (attrnum == NTFS_A_INDXROOT) 1249 blnum = 0; 1250 else 1251 blnum++; 1252 1253 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) { 1254 if (bmp[blnum >> 3] & (1 << (blnum & 7))) 1255 break; 1256 blnum++; 1257 } 1258 1259 attrnum = NTFS_A_INDX; 1260 aoff = 0; 1261 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen) 1262 break; 1263 DPRINTF("ntfs_ntreaddir: blnum: %u\n", blnum); 1264 } 1265 } while (iavap); 1266 1267 *riepp = NULL; 1268 fp->f_lastdnum = 0; 1269 1270 fail: 1271 if (vap) 1272 ntfs_ntvattrrele(vap); 1273 if (bmvap) 1274 ntfs_ntvattrrele(bmvap); 1275 if (iavap) 1276 ntfs_ntvattrrele(iavap); 1277 if (bmp) 1278 free(bmp, M_TEMP, 0); 1279 ntfs_ntput(ip); 1280 1281 return (error); 1282 } 1283 1284 /* 1285 * Convert NTFS times that are in 100 ns units and begins from 1286 * 1601 Jan 1 into unix times. 1287 */ 1288 struct timespec 1289 ntfs_nttimetounix(u_int64_t nt) 1290 { 1291 struct timespec t; 1292 1293 /* Windows NT times are in 100 ns and from 1601 Jan 1 */ 1294 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100; 1295 t.tv_sec = nt / (1000 * 1000 * 10) - 1296 369LL * 365LL * 24LL * 60LL * 60LL - 1297 89LL * 1LL * 24LL * 60LL * 60LL; 1298 return (t); 1299 } 1300 1301 /* 1302 * Get file sizes from corresponding attribute. 1303 * 1304 * ntnode under fnode should be locked. 1305 */ 1306 int 1307 ntfs_filesize(struct ntfsmount *ntmp, struct fnode *fp, u_int64_t *size, 1308 u_int64_t *bytes) 1309 { 1310 struct ntvattr *vap; 1311 struct ntnode *ip = FTONT(fp); 1312 u_int64_t sz, bn; 1313 int error; 1314 1315 DPRINTF("ntfs_filesize: ino: %u\n", ip->i_number); 1316 1317 error = ntfs_ntvattrget(ntmp, ip, 1318 fp->f_attrtype, fp->f_attrname, 0, &vap); 1319 if (error) 1320 return (error); 1321 1322 bn = vap->va_allocated; 1323 sz = vap->va_datalen; 1324 1325 DPRINTF("ntfs_filesize: %llu bytes (%llu bytes allocated)\n", sz, bn); 1326 1327 if (size) 1328 *size = sz; 1329 if (bytes) 1330 *bytes = bn; 1331 1332 ntfs_ntvattrrele(vap); 1333 1334 return (0); 1335 } 1336 1337 /* 1338 * This is one of the read routines. 1339 * 1340 * ntnode should be locked. 1341 */ 1342 int 1343 ntfs_readntvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip, 1344 struct ntvattr *vap, off_t roff, size_t rsize, void *rdata, size_t *initp, 1345 struct uio *uio) 1346 { 1347 int error = 0; 1348 off_t off; 1349 1350 *initp = 0; 1351 if (vap->va_flag & NTFS_AF_INRUN) { 1352 int cnt; 1353 cn_t ccn, ccl, cn, cl; 1354 caddr_t data = rdata; 1355 struct buf *bp; 1356 size_t left, tocopy; 1357 1358 DDPRINTF("ntfs_readntvattr_plain: data in run: %lu chains\n", 1359 vap->va_vruncnt); 1360 1361 off = roff; 1362 left = rsize; 1363 ccl = 0; 1364 ccn = 0; 1365 cnt = 0; 1366 while (left && (cnt < vap->va_vruncnt)) { 1367 ccn = vap->va_vruncn[cnt]; 1368 ccl = vap->va_vruncl[cnt]; 1369 1370 DDPRINTF("ntfs_readntvattr_plain: left %zu, " 1371 "cn: 0x%llx, cl: %llu, off: %lld\n", 1372 left, ccn, ccl, off); 1373 1374 if (ntfs_cntob(ccl) < off) { 1375 off -= ntfs_cntob(ccl); 1376 cnt++; 1377 continue; 1378 } 1379 if (ccn || ip->i_number == NTFS_BOOTINO) { 1380 ccl -= ntfs_btocn(off); 1381 cn = ccn + ntfs_btocn(off); 1382 off = ntfs_btocnoff(off); 1383 1384 while (left && ccl) { 1385 /* 1386 * Always read single clusters at a 1387 * time - we need to avoid reading 1388 * differently-sized blocks at the 1389 * same disk offsets to avoid 1390 * confusing the buffer cache. 1391 */ 1392 tocopy = MIN(left, 1393 ntfs_cntob(1) - off); 1394 cl = ntfs_btocl(tocopy + off); 1395 KASSERT(cl == 1 && 1396 tocopy <= ntfs_cntob(1)); 1397 1398 DDPRINTF("ntfs_readntvattr_plain: " 1399 "read: cn: 0x%llx cl: %llu, " 1400 "off: %lld, len: %zu, " 1401 "left: %zu\n", 1402 cn, cl, off, tocopy, left); 1403 error = bread(ntmp->ntm_devvp, 1404 ntfs_cntobn(cn), 1405 ntfs_cntob(cl), 1406 &bp); 1407 if (error) { 1408 brelse(bp); 1409 return (error); 1410 } 1411 if (uio) { 1412 error = uiomove(bp->b_data + off, 1413 tocopy, uio); 1414 if (error != 0) 1415 break; 1416 } else { 1417 memcpy(data, bp->b_data + off, 1418 tocopy); 1419 } 1420 brelse(bp); 1421 data = data + tocopy; 1422 *initp += tocopy; 1423 off = 0; 1424 left -= tocopy; 1425 cn += cl; 1426 ccl -= cl; 1427 } 1428 } else { 1429 tocopy = MIN(left, ntfs_cntob(ccl) - off); 1430 DDPRINTF("ntfs_readntvattr_plain: hole: " 1431 "ccn: 0x%llx ccl: %llu, off: %lld, " 1432 "len: %zu, left: %zu\n", 1433 ccn, ccl, off, tocopy, left); 1434 left -= tocopy; 1435 off = 0; 1436 if (uio) { 1437 size_t remains = tocopy; 1438 for(; remains; remains--) { 1439 error = uiomove("", 1, uio); 1440 if (error != 0) 1441 break; 1442 } 1443 } else 1444 bzero(data, tocopy); 1445 data = data + tocopy; 1446 } 1447 cnt++; 1448 if (error != 0) 1449 break; 1450 } 1451 if (left && error == 0) { 1452 printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n"); 1453 error = E2BIG; 1454 } 1455 } else { 1456 DDPRINTF("ntfs_readnvattr_plain: data is in mft record\n"); 1457 if (uio) 1458 error = uiomove(vap->va_datap + roff, rsize, uio); 1459 else 1460 memcpy(rdata, vap->va_datap + roff, rsize); 1461 *initp += rsize; 1462 } 1463 1464 return (error); 1465 } 1466 1467 /* 1468 * This is one of read routines. 1469 */ 1470 int 1471 ntfs_readattr_plain(struct ntfsmount *ntmp, struct ntnode *ip, 1472 u_int32_t attrnum, char *attrname, off_t roff, size_t rsize, void *rdata, 1473 size_t *initp, struct uio *uio) 1474 { 1475 size_t init; 1476 int error = 0; 1477 off_t off = roff; 1478 size_t left = rsize, toread; 1479 caddr_t data = rdata; 1480 struct ntvattr *vap; 1481 *initp = 0; 1482 1483 while (left) { 1484 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 1485 ntfs_btocn(off), &vap); 1486 if (error) 1487 return (error); 1488 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off); 1489 DDPRINTF("ntfs_readattr_plain: o: %lld, s: %zu " 1490 "(%llu - %llu)\n", off, toread, 1491 vap->va_vcnstart, vap->va_vcnend); 1492 error = ntfs_readntvattr_plain(ntmp, ip, vap, 1493 off - ntfs_cntob(vap->va_vcnstart), 1494 toread, data, &init, uio); 1495 if (error) { 1496 printf("ntfs_readattr_plain: ntfs_readntvattr_plain " 1497 "failed: o: %lld, s: %zu\n", off, toread); 1498 printf("ntfs_readattr_plain: attrib: %llu - %llu\n", 1499 vap->va_vcnstart, vap->va_vcnend); 1500 ntfs_ntvattrrele(vap); 1501 break; 1502 } 1503 ntfs_ntvattrrele(vap); 1504 left -= toread; 1505 off += toread; 1506 data = data + toread; 1507 *initp += init; 1508 } 1509 1510 return (error); 1511 } 1512 1513 /* 1514 * This is one of read routines. 1515 */ 1516 int 1517 ntfs_readattr(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t attrnum, 1518 char *attrname, off_t roff, size_t rsize, void *rdata, struct uio *uio) 1519 { 1520 int error = 0; 1521 struct ntvattr *vap; 1522 size_t init; 1523 1524 DDPRINTF("ntfs_readattr: reading %u: 0x%x, from %lld size %zu bytes\n", 1525 ip->i_number, attrnum, roff, rsize); 1526 1527 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap); 1528 if (error) 1529 return (error); 1530 1531 if ((roff > vap->va_datalen) || 1532 (roff + rsize > vap->va_datalen)) { 1533 printf("ntfs_readattr: offset too big: %lld (%lld) > %llu\n", 1534 roff, roff + rsize, vap->va_datalen); 1535 ntfs_ntvattrrele(vap); 1536 return (E2BIG); 1537 } 1538 if (vap->va_compression && vap->va_compressalg) { 1539 u_int8_t *cup; 1540 u_int8_t *uup; 1541 off_t off = roff; 1542 caddr_t data = rdata; 1543 cn_t cn; 1544 size_t left = rsize, tocopy; 1545 1546 DDPRINTF("ntfs_ntreadattr: compression: %u\n", 1547 vap->va_compressalg); 1548 1549 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL), M_NTFSDECOMP, 1550 M_WAITOK); 1551 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL), M_NTFSDECOMP, 1552 M_WAITOK); 1553 1554 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1)); 1555 off = roff - ntfs_cntob(cn); 1556 1557 while (left) { 1558 error = ntfs_readattr_plain(ntmp, ip, attrnum, 1559 attrname, ntfs_cntob(cn), 1560 ntfs_cntob(NTFS_COMPUNIT_CL), 1561 cup, &init, NULL); 1562 if (error) 1563 break; 1564 1565 tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off); 1566 1567 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) { 1568 if (uio) 1569 error = uiomove(cup + off, tocopy, uio); 1570 else 1571 memcpy(data, cup + off, tocopy); 1572 } else if (init == 0) { 1573 if (uio) { 1574 size_t remains = tocopy; 1575 for(; remains; remains--) { 1576 error = uiomove("", 1, uio); 1577 if (error != 0) 1578 break; 1579 } 1580 } 1581 else 1582 bzero(data, tocopy); 1583 } else { 1584 error = ntfs_uncompunit(ntmp, uup, cup); 1585 if (error) 1586 break; 1587 if (uio) 1588 error = uiomove(uup + off, tocopy, uio); 1589 else 1590 memcpy(data, uup + off, tocopy); 1591 } 1592 if (error) 1593 break; 1594 1595 left -= tocopy; 1596 data = data + tocopy; 1597 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL); 1598 cn += NTFS_COMPUNIT_CL; 1599 } 1600 1601 free(uup, M_NTFSDECOMP, 0); 1602 free(cup, M_NTFSDECOMP, 0); 1603 } else 1604 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname, 1605 roff, rsize, rdata, &init, uio); 1606 ntfs_ntvattrrele(vap); 1607 return (error); 1608 } 1609 1610 #if UNUSED_CODE 1611 int 1612 ntfs_parserun(cn_t *cn, cn_t *cl, u_int8_t *run, u_long len, u_long *off) 1613 { 1614 u_int8_t sz; 1615 int i; 1616 1617 if (NULL == run) { 1618 printf("ntfs_parsetun: run == NULL\n"); 1619 return (EINVAL); 1620 } 1621 sz = run[(*off)++]; 1622 if (0 == sz) { 1623 printf("ntfs_parserun: trying to go out of run\n"); 1624 return (E2BIG); 1625 } 1626 *cl = 0; 1627 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) { 1628 printf("ntfs_parserun: " \ 1629 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n", 1630 sz, len, *off); 1631 return (EINVAL); 1632 } 1633 for (i = 0; i < (sz & 0xF); i++) 1634 *cl += (u_int32_t) run[(*off)++] << (i << 3); 1635 1636 sz >>= 4; 1637 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) { 1638 printf("ntfs_parserun: " \ 1639 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n", 1640 sz, len, *off); 1641 return (EINVAL); 1642 } 1643 for (i = 0; i < (sz & 0xF); i++) 1644 *cn += (u_int32_t) run[(*off)++] << (i << 3); 1645 1646 return (0); 1647 } 1648 #endif 1649 1650 /* 1651 * Process fixup routine on given buffer. 1652 */ 1653 int 1654 ntfs_procfixups(struct ntfsmount *ntmp, u_int32_t magic, caddr_t buf, 1655 size_t len) 1656 { 1657 struct fixuphdr *fhp = (struct fixuphdr *) buf; 1658 int i; 1659 u_int16_t fixup; 1660 u_int16_t *fxp; 1661 u_int16_t *cfxp; 1662 1663 if (fhp->fh_magic != magic) { 1664 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n", 1665 fhp->fh_magic, magic); 1666 return (EINVAL); 1667 } 1668 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) { 1669 printf("ntfs_procfixups: " \ 1670 "bad fixups number: %d for %ld bytes block\n", 1671 fhp->fh_fnum, (long)len); /* XXX printf kludge */ 1672 return (EINVAL); 1673 } 1674 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) { 1675 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff); 1676 return (EINVAL); 1677 } 1678 fxp = (u_int16_t *) (buf + fhp->fh_foff); 1679 cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2); 1680 fixup = *fxp++; 1681 for (i = 1; i < fhp->fh_fnum; i++, fxp++) { 1682 if (*cfxp != fixup) { 1683 printf("ntfs_procfixups: fixup %d doesn't match\n", i); 1684 return (EINVAL); 1685 } 1686 *cfxp = *fxp; 1687 cfxp = (u_int16_t *)((caddr_t)cfxp + ntmp->ntm_bps); 1688 } 1689 return (0); 1690 } 1691 1692 #if UNUSED_CODE 1693 int 1694 ntfs_runtocn(cn_t *cn, struct ntfsmount *ntmp, u_int8_t *run, u_long len, 1695 cn_t vcn) 1696 { 1697 cn_t ccn = 0; 1698 cn_t ccl = 0; 1699 u_long off = 0; 1700 int error = 0; 1701 1702 #if NTFS_DEBUG 1703 int i; 1704 printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n", 1705 run, len, (u_long) vcn); 1706 printf("ntfs_runtocn: run: "); 1707 for (i = 0; i < len; i++) 1708 printf("0x%02x ", run[i]); 1709 printf("\n"); 1710 #endif 1711 1712 if (NULL == run) { 1713 printf("ntfs_runtocn: run == NULL\n"); 1714 return (EINVAL); 1715 } 1716 do { 1717 if (run[off] == 0) { 1718 printf("ntfs_runtocn: vcn too big\n"); 1719 return (E2BIG); 1720 } 1721 vcn -= ccl; 1722 error = ntfs_parserun(&ccn, &ccl, run, len, &off); 1723 if (error) { 1724 printf("ntfs_runtocn: ntfs_parserun failed\n"); 1725 return (error); 1726 } 1727 } while (ccl <= vcn); 1728 *cn = ccn + vcn; 1729 return (0); 1730 } 1731 #endif 1732 1733 /* 1734 * if the ntfs_toupper_tab[] is filled already, just raise use count; 1735 * otherwise read the data from the filesystem we are currently mounting 1736 */ 1737 int 1738 ntfs_toupper_use(struct mount *mp, struct ntfsmount *ntmp, struct proc *p) 1739 { 1740 int error = 0; 1741 struct vnode *vp; 1742 1743 /* get exclusive access */ 1744 rw_enter_write(&ntfs_toupper_lock); 1745 1746 /* only read the translation data from a file if it hasn't been 1747 * read already */ 1748 if (ntfs_toupper_tab) 1749 goto out; 1750 1751 /* 1752 * Read in Unicode lowercase -> uppercase translation file. 1753 * XXX for now, just the first 256 entries are used anyway, 1754 * so don't bother reading more 1755 */ 1756 ntfs_toupper_tab = malloc(256 * 256 * sizeof(wchar), M_NTFSRDATA, 1757 M_WAITOK); 1758 1759 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp))) 1760 goto out; 1761 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 1762 0, 256*256*sizeof(wchar), (char *) ntfs_toupper_tab, 1763 NULL); 1764 vput(vp); 1765 1766 out: 1767 ntfs_toupper_usecount++; 1768 rw_exit_write(&ntfs_toupper_lock); 1769 return (error); 1770 } 1771 1772 /* 1773 * lower the use count and if it reaches zero, free the memory 1774 * tied by toupper table 1775 */ 1776 void 1777 ntfs_toupper_unuse(struct proc *p) 1778 { 1779 /* get exclusive access */ 1780 rw_enter_write(&ntfs_toupper_lock); 1781 1782 ntfs_toupper_usecount--; 1783 if (ntfs_toupper_usecount == 0) { 1784 free(ntfs_toupper_tab, M_NTFSRDATA, 0); 1785 ntfs_toupper_tab = NULL; 1786 } 1787 #ifdef DIAGNOSTIC 1788 else if (ntfs_toupper_usecount < 0) { 1789 panic("ntfs_toupper_unuse(): use count negative: %d", 1790 ntfs_toupper_usecount); 1791 } 1792 #endif 1793 1794 /* release the lock */ 1795 rw_exit_write(&ntfs_toupper_lock); 1796 }
Cache object: d06652956fffe723d9d0d1374d391c3d
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