1 /* $OpenBSD: ntfs_subr.c,v 1.46 2016/06/01 15:44:07 natano 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, curproc, &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, struct proc *p) 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 struct proc *p) 387 { 388 struct ntnode *ip; 389 390 DPRINTF("ntfs_ntlookup: looking for ntnode %u\n", ino); 391 392 do { 393 if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) { 394 ntfs_ntget(ip, p); 395 DPRINTF("ntfs_ntlookup: ntnode %u: %p, usecount: %d\n", 396 ino, ip, ip->i_usecount); 397 *ipp = ip; 398 return (0); 399 } 400 } while (rw_enter(&ntfs_hashlock, RW_WRITE | RW_SLEEPFAIL)); 401 402 ip = malloc(sizeof(*ip), M_NTFSNTNODE, M_WAITOK | M_ZERO); 403 DDPRINTF("ntfs_ntlookup: allocating ntnode: %u: %p\n", ino, ip); 404 405 /* Generic initialization */ 406 ip->i_devvp = ntmp->ntm_devvp; 407 ip->i_dev = ntmp->ntm_dev; 408 ip->i_number = ino; 409 ip->i_mp = ntmp; 410 411 LIST_INIT(&ip->i_fnlist); 412 vref(ip->i_devvp); 413 414 /* init lock and lock the newborn ntnode */ 415 rw_init(&ip->i_lock, "ntnode"); 416 ntfs_ntget(ip, p); 417 418 ntfs_nthashins(ip); 419 420 rw_exit(&ntfs_hashlock); 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, struct proc *p) 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 i = 0; 610 while (run[off]) { 611 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1; 612 cnt++; 613 } 614 cn = mallocarray(cnt, sizeof(cn_t), M_NTFSRUN, M_WAITOK); 615 cl = mallocarray(cnt, sizeof(cn_t), M_NTFSRUN, M_WAITOK); 616 617 off = 0; 618 cnt = 0; 619 prev = 0; 620 while (run[off]) { 621 622 sz = run[off++]; 623 cl[cnt] = 0; 624 625 for (i = 0; i < (sz & 0xF); i++) 626 cl[cnt] += (u_int32_t) run[off++] << (i << 3); 627 628 sz >>= 4; 629 if (run[off + sz - 1] & 0x80) { 630 tmp = ((u_int64_t) - 1) << (sz << 3); 631 for (i = 0; i < sz; i++) 632 tmp |= (u_int64_t) run[off++] << (i << 3); 633 } else { 634 tmp = 0; 635 for (i = 0; i < sz; i++) 636 tmp |= (u_int64_t) run[off++] << (i << 3); 637 } 638 if (tmp) 639 prev = cn[cnt] = prev + tmp; 640 else 641 cn[cnt] = tmp; 642 643 cnt++; 644 } 645 *rcnp = cn; 646 *rclp = cl; 647 *rcntp = cnt; 648 return (0); 649 } 650 651 /* 652 * Compare unicode and ascii string case insens. 653 */ 654 int 655 ntfs_uastricmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen, 656 const char *astr, size_t astrlen) 657 { 658 size_t i; 659 int res; 660 const char *astrend = astr + astrlen; 661 662 for (i = 0; i < ustrlen && astr < astrend; i++) { 663 res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i]), 664 NTFS_TOUPPER((*ntmp->ntm_wget)(&astr)) ); 665 if (res) 666 return res; 667 } 668 669 if (i == ustrlen && astr == astrend) 670 return 0; 671 else if (i == ustrlen) 672 return -1; 673 else 674 return 1; 675 } 676 677 /* 678 * Compare unicode and ascii string case sens. 679 */ 680 int 681 ntfs_uastrcmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen, 682 const char *astr, size_t astrlen) 683 { 684 size_t i; 685 int res; 686 const char *astrend = astr + astrlen; 687 688 for (i = 0; (i < ustrlen) && (astr < astrend); i++) { 689 res = (*ntmp->ntm_wcmp)(ustr[i], (*ntmp->ntm_wget)(&astr)); 690 if (res) 691 return res; 692 } 693 694 if (i == ustrlen && astr == astrend) 695 return 0; 696 else if (i == ustrlen) 697 return -1; 698 else 699 return 1; 700 } 701 702 /* 703 * Search fnode in ntnode, if not found allocate and preinitialize. 704 * 705 * ntnode should be locked on entry. 706 */ 707 int 708 ntfs_fget(struct ntfsmount *ntmp, struct ntnode *ip, int attrtype, 709 char *attrname, struct fnode **fpp) 710 { 711 struct fnode *fp; 712 713 DPRINTF("ntfs_fget: ino: %u, attrtype: 0x%x, attrname: %s\n", 714 ip->i_number, attrtype, attrname ? attrname : ""); 715 *fpp = NULL; 716 LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist) { 717 DPRINTF("ntfs_fget: fnode: attrtype: %u, attrname: %s\n", 718 fp->f_attrtype, fp->f_attrname ? fp->f_attrname : ""); 719 720 if ((attrtype == fp->f_attrtype) && 721 ((!attrname && !fp->f_attrname) || 722 (attrname && fp->f_attrname && 723 !strcmp(attrname,fp->f_attrname)))){ 724 DPRINTF("ntfs_fget: found existed: %p\n", fp); 725 *fpp = fp; 726 } 727 } 728 729 if (*fpp) 730 return (0); 731 732 fp = malloc(sizeof(*fp), M_NTFSFNODE, M_WAITOK | M_ZERO); 733 DPRINTF("ntfs_fget: allocating fnode: %p\n", fp); 734 735 fp->f_ip = ip; 736 fp->f_attrname = attrname; 737 if (fp->f_attrname) fp->f_flag |= FN_AATTRNAME; 738 fp->f_attrtype = attrtype; 739 740 ntfs_ntref(ip); 741 742 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist); 743 744 *fpp = fp; 745 746 return (0); 747 } 748 749 /* 750 * Deallocate fnode, remove it from ntnode's fnode list. 751 * 752 * ntnode should be locked. 753 */ 754 void 755 ntfs_frele(struct fnode *fp) 756 { 757 struct ntnode *ip = FTONT(fp); 758 759 DPRINTF("ntfs_frele: fnode: %p for %u: %p\n", fp, ip->i_number, ip); 760 761 DPRINTF("ntfs_frele: deallocating fnode\n"); 762 LIST_REMOVE(fp,f_fnlist); 763 if (fp->f_flag & FN_AATTRNAME) 764 free(fp->f_attrname, M_TEMP, 0); 765 if (fp->f_dirblbuf) 766 free(fp->f_dirblbuf, M_NTFSDIR, 0); 767 free(fp, M_NTFSFNODE, 0); 768 ntfs_ntrele(ip); 769 } 770 771 /* 772 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 773 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs. 774 * If $ATTR_TYPE not specified, ATTR_A_DATA assumed. 775 */ 776 int 777 ntfs_ntlookupattr(struct ntfsmount *ntmp, const char *name, int namelen, 778 int *attrtype, char **attrname) 779 { 780 const char *sys; 781 size_t syslen, i; 782 struct ntvattrdef *adp; 783 784 if (namelen == 0) 785 return (0); 786 787 if (name[0] == '$') { 788 sys = name; 789 for (syslen = 0; syslen < namelen; syslen++) { 790 if(sys[syslen] == ':') { 791 name++; 792 namelen--; 793 break; 794 } 795 } 796 name += syslen; 797 namelen -= syslen; 798 799 adp = ntmp->ntm_ad; 800 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){ 801 if (syslen != adp->ad_namelen || 802 strncmp(sys, adp->ad_name, syslen) != 0) 803 continue; 804 805 *attrtype = adp->ad_type; 806 goto out; 807 } 808 return (ENOENT); 809 } 810 811 out: 812 if (namelen) { 813 *attrname = malloc(namelen + 1, M_TEMP, M_WAITOK); 814 memcpy(*attrname, name, namelen); 815 (*attrname)[namelen] = '\0'; 816 *attrtype = NTFS_A_DATA; 817 } 818 819 return (0); 820 } 821 822 /* 823 * Lookup specified node for filename, matching cnp, return fnode filled. 824 */ 825 int 826 ntfs_ntlookupfile(struct ntfsmount *ntmp, struct vnode *vp, 827 struct componentname *cnp, struct vnode **vpp, struct proc *p) 828 { 829 struct fnode *fp = VTOF(vp); 830 struct ntnode *ip = FTONT(fp); 831 struct ntvattr *vap = NULL; /* Root attribute */ 832 cn_t cn = 0; /* VCN in current attribute */ 833 caddr_t rdbuf = NULL; /* Buffer to read directory's blocks */ 834 u_int32_t blsize; 835 u_int32_t rdsize; /* Length of data to read from current block */ 836 struct attr_indexentry *iep; 837 int error, res, anamelen, fnamelen; 838 const char *fname,*aname; 839 u_int32_t aoff; 840 int attrtype = NTFS_A_DATA; 841 char *attrname = NULL; 842 struct fnode *nfp; 843 struct vnode *nvp; 844 enum vtype f_type; 845 int fullscan = 0; 846 struct ntfs_lookup_ctx *lookup_ctx = NULL, *tctx; 847 848 error = ntfs_ntget(ip, p); 849 if (error) 850 return (error); 851 852 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap); 853 if (error || (vap->va_flag & NTFS_AF_INRUN)) { 854 error = ENOTDIR; 855 goto fail; 856 } 857 858 /* 859 * Divide file name into: foofilefoofilefoofile[:attrspec] 860 * Store like this: fname:fnamelen [aname:anamelen] 861 */ 862 fname = cnp->cn_nameptr; 863 aname = NULL; 864 anamelen = 0; 865 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++) 866 if(fname[fnamelen] == ':') { 867 aname = fname + fnamelen + 1; 868 anamelen = cnp->cn_namelen - fnamelen - 1; 869 DPRINTF("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n", 870 fname, fnamelen, aname, anamelen); 871 break; 872 } 873 874 blsize = vap->va_a_iroot->ir_size; 875 DPRINTF("ntfs_ntlookupfile: blksz: %u\n", blsize); 876 877 rdbuf = malloc(blsize, M_TEMP, M_WAITOK); 878 879 loop: 880 rdsize = vap->va_datalen; 881 DPRINTF("ntfs_ntlookupfile: rdsz: %u\n", rdsize); 882 883 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30", 884 0, rdsize, rdbuf, NULL); 885 if (error) 886 goto fail; 887 888 aoff = sizeof(struct attr_indexroot); 889 890 do { 891 iep = (struct attr_indexentry *) (rdbuf + aoff); 892 893 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff); 894 aoff += iep->reclen, 895 iep = (struct attr_indexentry *) (rdbuf + aoff)) 896 { 897 DDPRINTF("scan: %u, %u\n", iep->ie_number, 898 iep->ie_fnametype); 899 900 /* check the name - the case-insensitive check 901 * has to come first, to break from this for loop 902 * if needed, so we can dive correctly */ 903 res = ntfs_uastricmp(ntmp, iep->ie_fname, 904 iep->ie_fnamelen, fname, fnamelen); 905 if (!fullscan) { 906 if (res > 0) break; 907 if (res < 0) continue; 908 } 909 910 if (iep->ie_fnametype == 0 || 911 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS)) 912 { 913 res = ntfs_uastrcmp(ntmp, iep->ie_fname, 914 iep->ie_fnamelen, fname, fnamelen); 915 if (res != 0 && !fullscan) continue; 916 } 917 918 /* if we perform full scan, the file does not match 919 * and this is subnode, dive */ 920 if (fullscan && res != 0) { 921 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) { 922 tctx = malloc(sizeof(struct ntfs_lookup_ctx), 923 M_TEMP, M_WAITOK); 924 tctx->aoff = aoff + iep->reclen; 925 tctx->rdsize = rdsize; 926 tctx->cn = cn; 927 tctx->prev = lookup_ctx; 928 lookup_ctx = tctx; 929 break; 930 } else 931 continue; 932 } 933 934 if (aname) { 935 error = ntfs_ntlookupattr(ntmp, 936 aname, anamelen, 937 &attrtype, &attrname); 938 if (error) 939 goto fail; 940 } 941 942 /* Check if we've found ourselves */ 943 if ((iep->ie_number == ip->i_number) && 944 (attrtype == fp->f_attrtype) && 945 ((!attrname && !fp->f_attrname) || 946 (attrname && fp->f_attrname && 947 !strcmp(attrname, fp->f_attrname)))) 948 { 949 vref(vp); 950 *vpp = vp; 951 error = 0; 952 goto fail; 953 } 954 955 /* free the buffer returned by ntfs_ntlookupattr() */ 956 if (attrname) { 957 free(attrname, M_TEMP, 0); 958 attrname = NULL; 959 } 960 961 /* vget node, but don't load it */ 962 error = ntfs_vgetex(ntmp->ntm_mountp, 963 iep->ie_number, attrtype, attrname, 964 LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN, 965 curproc, &nvp); 966 if (error) 967 goto fail; 968 969 nfp = VTOF(nvp); 970 971 if (nfp->f_flag & FN_VALID) { 972 *vpp = nvp; 973 goto fail; 974 } 975 976 nfp->f_fflag = iep->ie_fflag; 977 nfp->f_pnumber = iep->ie_fpnumber; 978 nfp->f_times = iep->ie_ftimes; 979 980 if((nfp->f_fflag & NTFS_FFLAG_DIR) && 981 (nfp->f_attrtype == NTFS_A_DATA) && 982 (nfp->f_attrname == NULL)) 983 f_type = VDIR; 984 else 985 f_type = VREG; 986 987 nvp->v_type = f_type; 988 989 if ((nfp->f_attrtype == NTFS_A_DATA) && 990 (nfp->f_attrname == NULL)) 991 { 992 /* Opening default attribute */ 993 nfp->f_size = iep->ie_fsize; 994 nfp->f_allocated = iep->ie_fallocated; 995 nfp->f_flag |= FN_PRELOADED; 996 } else { 997 error = ntfs_filesize(ntmp, nfp, 998 &nfp->f_size, &nfp->f_allocated); 999 if (error) { 1000 vput(nvp); 1001 goto fail; 1002 } 1003 } 1004 1005 nfp->f_flag &= ~FN_VALID; 1006 *vpp = nvp; 1007 goto fail; 1008 } 1009 1010 /* Dive if possible */ 1011 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) { 1012 DPRINTF("ntfs_ntlookupfile: diving\n"); 1013 1014 cn = *(cn_t *) (rdbuf + aoff + 1015 iep->reclen - sizeof(cn_t)); 1016 rdsize = blsize; 1017 1018 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30", 1019 ntfs_cntob(cn), rdsize, rdbuf, NULL); 1020 if (error) 1021 goto fail; 1022 1023 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1024 rdbuf, rdsize); 1025 if (error) 1026 goto fail; 1027 1028 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize + 1029 0x18); 1030 } else if (fullscan && lookup_ctx) { 1031 cn = lookup_ctx->cn; 1032 aoff = lookup_ctx->aoff; 1033 rdsize = lookup_ctx->rdsize; 1034 1035 error = ntfs_readattr(ntmp, ip, 1036 (cn == 0) ? NTFS_A_INDXROOT : NTFS_A_INDX, 1037 "$I30", ntfs_cntob(cn), rdsize, rdbuf, NULL); 1038 if (error) 1039 goto fail; 1040 1041 if (cn != 0) { 1042 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1043 rdbuf, rdsize); 1044 if (error) 1045 goto fail; 1046 } 1047 1048 tctx = lookup_ctx; 1049 lookup_ctx = lookup_ctx->prev; 1050 free(tctx, M_TEMP, 0); 1051 } else { 1052 DPRINTF("ntfs_ntlookupfile: nowhere to dive :-(\n"); 1053 error = ENOENT; 1054 break; 1055 } 1056 } while (1); 1057 1058 if (error == ENOENT) { 1059 /* perform full scan if no entry was found */ 1060 if (!fullscan) { 1061 fullscan = 1; 1062 cn = 0; /* need zero, used by lookup_ctx */ 1063 1064 DDPRINTF("ntfs_ntlookupfile: fullscan performed for: %.*s\n", 1065 (unsigned int)fnamelen, fname); 1066 goto loop; 1067 } 1068 1069 if ((cnp->cn_flags & ISLASTCN) && 1070 (cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME)) 1071 error = EJUSTRETURN; 1072 } 1073 1074 DPRINTF("finish\n"); 1075 1076 fail: 1077 if (vap) 1078 ntfs_ntvattrrele(vap); 1079 if (rdbuf) 1080 free(rdbuf, M_TEMP, 0); 1081 if (attrname) 1082 free(attrname, M_TEMP, 0); 1083 if (lookup_ctx) { 1084 while(lookup_ctx) { 1085 tctx = lookup_ctx; 1086 lookup_ctx = lookup_ctx->prev; 1087 free(tctx, M_TEMP, 0); 1088 } 1089 } 1090 ntfs_ntput(ip, p); 1091 return (error); 1092 } 1093 1094 /* 1095 * Check if name type is permitted to show. 1096 */ 1097 int 1098 ntfs_isnamepermitted(struct ntfsmount *ntmp, struct attr_indexentry *iep) 1099 { 1100 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES) 1101 return 1; 1102 1103 switch (iep->ie_fnametype) { 1104 case 2: 1105 DDPRINTF("ntfs_isnamepermitted: skipped DOS name\n"); 1106 return 0; 1107 case 0: case 1: case 3: 1108 return 1; 1109 default: 1110 printf("ntfs_isnamepermitted: " \ 1111 "WARNING! Unknown file name type: %d\n", 1112 iep->ie_fnametype); 1113 break; 1114 } 1115 return 0; 1116 } 1117 1118 /* 1119 * Read ntfs dir like stream of attr_indexentry, not like btree of them. 1120 * This is done by scanning $BITMAP:$I30 for busy clusters and reading them. 1121 * Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in 1122 * fnode, so we can skip toward record number num almost immediately. 1123 * Anyway this is rather slow routine. The problem is that we don't know 1124 * how many records are there in $INDEX_ALLOCATION:$I30 block. 1125 */ 1126 int 1127 ntfs_ntreaddir(struct ntfsmount *ntmp, struct fnode *fp, u_int32_t num, 1128 struct attr_indexentry **riepp, struct proc *p) 1129 { 1130 struct ntnode *ip = FTONT(fp); 1131 struct ntvattr *vap = NULL; /* IndexRoot attribute */ 1132 struct ntvattr *bmvap = NULL; /* BitMap attribute */ 1133 struct ntvattr *iavap = NULL; /* IndexAllocation attribute */ 1134 caddr_t rdbuf; /* Buffer to read directory's blocks */ 1135 u_int8_t *bmp = NULL; /* Bitmap */ 1136 u_int32_t blsize; /* Index allocation size (2048) */ 1137 u_int32_t rdsize; /* Length of data to read */ 1138 u_int32_t attrnum; /* Current attribute type */ 1139 u_int32_t cpbl = 1; /* Clusters per directory block */ 1140 u_int32_t blnum; 1141 struct attr_indexentry *iep; 1142 int error = ENOENT; 1143 u_int32_t aoff, cnum; 1144 1145 DPRINTF("ntfs_ntreaddir: read ino: %u, num: %u\n", ip->i_number, num); 1146 error = ntfs_ntget(ip, p); 1147 if (error) 1148 return (error); 1149 1150 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap); 1151 if (error) { 1152 error = ENOTDIR; 1153 goto fail; 1154 } 1155 1156 if (fp->f_dirblbuf == NULL) { 1157 fp->f_dirblsz = vap->va_a_iroot->ir_size; 1158 fp->f_dirblbuf = malloc(MAX(vap->va_datalen,fp->f_dirblsz), 1159 M_NTFSDIR, M_WAITOK); 1160 } 1161 1162 blsize = fp->f_dirblsz; 1163 rdbuf = fp->f_dirblbuf; 1164 1165 DPRINTF("ntfs_ntreaddir: rdbuf: %p, blsize: %u\n", rdbuf, blsize); 1166 1167 if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) { 1168 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 1169 0, &bmvap); 1170 if (error) { 1171 error = ENOTDIR; 1172 goto fail; 1173 } 1174 bmp = malloc(bmvap->va_datalen, M_TEMP, M_WAITOK); 1175 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0, 1176 bmvap->va_datalen, bmp, NULL); 1177 if (error) 1178 goto fail; 1179 1180 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30", 1181 0, &iavap); 1182 if (error) { 1183 error = ENOTDIR; 1184 goto fail; 1185 } 1186 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1); 1187 DPRINTF("ntfs_ntreaddir: indexalloc: %llu, cpbl: %u\n", 1188 iavap->va_datalen, cpbl); 1189 } else { 1190 DPRINTF("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"); 1191 iavap = bmvap = NULL; 1192 bmp = NULL; 1193 } 1194 1195 /* Try use previous values */ 1196 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) { 1197 attrnum = fp->f_lastdattr; 1198 aoff = fp->f_lastdoff; 1199 blnum = fp->f_lastdblnum; 1200 cnum = fp->f_lastdnum; 1201 } else { 1202 attrnum = NTFS_A_INDXROOT; 1203 aoff = sizeof(struct attr_indexroot); 1204 blnum = 0; 1205 cnum = 0; 1206 } 1207 1208 do { 1209 DPRINTF("ntfs_ntreaddir: scan: 0x%x, %u, %u, %u, %u\n", 1210 attrnum, blnum, cnum, num, aoff); 1211 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize; 1212 error = ntfs_readattr(ntmp, ip, attrnum, "$I30", 1213 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL); 1214 if (error) 1215 goto fail; 1216 1217 if (attrnum == NTFS_A_INDX) { 1218 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC, 1219 rdbuf, rdsize); 1220 if (error) 1221 goto fail; 1222 } 1223 if (aoff == 0) 1224 aoff = (attrnum == NTFS_A_INDX) ? 1225 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) : 1226 sizeof(struct attr_indexroot); 1227 1228 iep = (struct attr_indexentry *) (rdbuf + aoff); 1229 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff); 1230 aoff += iep->reclen, 1231 iep = (struct attr_indexentry *) (rdbuf + aoff)) 1232 { 1233 if (!ntfs_isnamepermitted(ntmp, iep)) continue; 1234 1235 if (cnum >= num) { 1236 fp->f_lastdnum = cnum; 1237 fp->f_lastdoff = aoff; 1238 fp->f_lastdblnum = blnum; 1239 fp->f_lastdattr = attrnum; 1240 1241 *riepp = iep; 1242 1243 error = 0; 1244 goto fail; 1245 } 1246 cnum++; 1247 } 1248 1249 if (iavap) { 1250 if (attrnum == NTFS_A_INDXROOT) 1251 blnum = 0; 1252 else 1253 blnum++; 1254 1255 while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) { 1256 if (bmp[blnum >> 3] & (1 << (blnum & 7))) 1257 break; 1258 blnum++; 1259 } 1260 1261 attrnum = NTFS_A_INDX; 1262 aoff = 0; 1263 if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen) 1264 break; 1265 DPRINTF("ntfs_ntreaddir: blnum: %u\n", blnum); 1266 } 1267 } while (iavap); 1268 1269 *riepp = NULL; 1270 fp->f_lastdnum = 0; 1271 1272 fail: 1273 if (vap) 1274 ntfs_ntvattrrele(vap); 1275 if (bmvap) 1276 ntfs_ntvattrrele(bmvap); 1277 if (iavap) 1278 ntfs_ntvattrrele(iavap); 1279 if (bmp) 1280 free(bmp, M_TEMP, 0); 1281 ntfs_ntput(ip, p); 1282 1283 return (error); 1284 } 1285 1286 /* 1287 * Convert NTFS times that are in 100 ns units and begins from 1288 * 1601 Jan 1 into unix times. 1289 */ 1290 struct timespec 1291 ntfs_nttimetounix(u_int64_t nt) 1292 { 1293 struct timespec t; 1294 1295 /* WindowNT times are in 100 ns and from 1601 Jan 1 */ 1296 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100; 1297 t.tv_sec = nt / (1000 * 1000 * 10) - 1298 369LL * 365LL * 24LL * 60LL * 60LL - 1299 89LL * 1LL * 24LL * 60LL * 60LL; 1300 return (t); 1301 } 1302 1303 /* 1304 * Get file sizes from corresponding attribute. 1305 * 1306 * ntnode under fnode should be locked. 1307 */ 1308 int 1309 ntfs_filesize(struct ntfsmount *ntmp, struct fnode *fp, u_int64_t *size, 1310 u_int64_t *bytes) 1311 { 1312 struct ntvattr *vap; 1313 struct ntnode *ip = FTONT(fp); 1314 u_int64_t sz, bn; 1315 int error; 1316 1317 DPRINTF("ntfs_filesize: ino: %u\n", ip->i_number); 1318 1319 error = ntfs_ntvattrget(ntmp, ip, 1320 fp->f_attrtype, fp->f_attrname, 0, &vap); 1321 if (error) 1322 return (error); 1323 1324 bn = vap->va_allocated; 1325 sz = vap->va_datalen; 1326 1327 DPRINTF("ntfs_filesize: %llu bytes (%llu bytes allocated)\n", sz, bn); 1328 1329 if (size) 1330 *size = sz; 1331 if (bytes) 1332 *bytes = bn; 1333 1334 ntfs_ntvattrrele(vap); 1335 1336 return (0); 1337 } 1338 1339 /* 1340 * This is one of the write routines. 1341 */ 1342 int 1343 ntfs_writeattr_plain(struct ntfsmount *ntmp, struct ntnode *ip, 1344 u_int32_t attrnum, char *attrname, off_t roff, size_t rsize, void *rdata, 1345 size_t *initp, struct uio *uio) 1346 { 1347 size_t init; 1348 int error = 0; 1349 off_t off = roff; 1350 size_t left = rsize, towrite; 1351 caddr_t data = rdata; 1352 struct ntvattr *vap; 1353 *initp = 0; 1354 1355 while (left) { 1356 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 1357 ntfs_btocn(off), &vap); 1358 if (error) 1359 return (error); 1360 towrite = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off); 1361 DDPRINTF("ntfs_writeattr_plain: o: %lld, s: %zu " 1362 "(%llu - %llu)\n", off, towrite, 1363 vap->va_vcnstart, vap->va_vcnend); 1364 error = ntfs_writentvattr_plain(ntmp, ip, vap, 1365 off - ntfs_cntob(vap->va_vcnstart), 1366 towrite, data, &init, uio); 1367 if (error) { 1368 DPRINTF("ntfs_writeattr_plain: ntfs_writentvattr_plain " 1369 "failed: o: %lld, s: %zu\n", off, towrite); 1370 DPRINTF("ntfs_writeattr_plain: attrib: %llu - %llu\n", 1371 vap->va_vcnstart, vap->va_vcnend); 1372 ntfs_ntvattrrele(vap); 1373 break; 1374 } 1375 ntfs_ntvattrrele(vap); 1376 left -= towrite; 1377 off += towrite; 1378 data = data + towrite; 1379 *initp += init; 1380 } 1381 1382 return (error); 1383 } 1384 1385 /* 1386 * This is one of the write routines. 1387 * 1388 * ntnode should be locked. 1389 */ 1390 int 1391 ntfs_writentvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip, 1392 struct ntvattr *vap, off_t roff, size_t rsize, void *rdata, size_t *initp, 1393 struct uio *uio) 1394 { 1395 int error = 0; 1396 off_t off; 1397 int cnt; 1398 cn_t ccn, ccl, cn, cl; 1399 caddr_t data = rdata; 1400 struct buf *bp; 1401 size_t left, tocopy; 1402 1403 *initp = 0; 1404 1405 if ((vap->va_flag & NTFS_AF_INRUN) == 0) { 1406 DPRINTF("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n"); 1407 return ENOTTY; 1408 } 1409 1410 DDPRINTF("ntfs_writentvattr_plain: data in run: %lu chains\n", 1411 vap->va_vruncnt); 1412 1413 off = roff; 1414 left = rsize; 1415 ccl = 0; 1416 ccn = 0; 1417 cnt = 0; 1418 for (; left && (cnt < vap->va_vruncnt); cnt++) { 1419 ccn = vap->va_vruncn[cnt]; 1420 ccl = vap->va_vruncl[cnt]; 1421 1422 DDPRINTF("ntfs_writentvattr_plain: left %zu, cn: 0x%llx, " 1423 "cl: %llu, off: %lld\n", left, ccn, ccl, off); 1424 1425 if (ntfs_cntob(ccl) < off) { 1426 off -= ntfs_cntob(ccl); 1427 cnt++; 1428 continue; 1429 } 1430 if (!ccn && ip->i_number != NTFS_BOOTINO) 1431 continue; /* XXX */ 1432 1433 ccl -= ntfs_btocn(off); 1434 cn = ccn + ntfs_btocn(off); 1435 off = ntfs_btocnoff(off); 1436 1437 while (left && ccl) { 1438 /* 1439 * Always read and write single clusters at a time - 1440 * we need to avoid requesting differently-sized 1441 * blocks at the same disk offsets to avoid 1442 * confusing the buffer cache. 1443 */ 1444 tocopy = MIN(left, ntfs_cntob(1) - off); 1445 cl = ntfs_btocl(tocopy + off); 1446 KASSERT(cl == 1 && tocopy <= ntfs_cntob(1)); 1447 DDPRINTF("ntfs_writentvattr_plain: write: cn: 0x%llx " 1448 "cl: %llu, off: %lld len: %zu, left: %zu\n", 1449 cn, cl, off, tocopy, left); 1450 if ((off == 0) && (tocopy == ntfs_cntob(cl))) 1451 { 1452 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn), 1453 ntfs_cntob(cl), 0, 0); 1454 clrbuf(bp); 1455 } else { 1456 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn), 1457 ntfs_cntob(cl), &bp); 1458 if (error) { 1459 brelse(bp); 1460 return (error); 1461 } 1462 } 1463 if (uio) { 1464 error = uiomove(bp->b_data + off, tocopy, uio); 1465 if (error != 0) 1466 break; 1467 } else 1468 memcpy(bp->b_data + off, data, tocopy); 1469 bawrite(bp); 1470 data = data + tocopy; 1471 *initp += tocopy; 1472 off = 0; 1473 left -= tocopy; 1474 cn += cl; 1475 ccl -= cl; 1476 } 1477 } 1478 1479 if (left && error == 0) { 1480 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n"); 1481 error = EINVAL; 1482 } 1483 1484 return (error); 1485 } 1486 1487 /* 1488 * This is one of the read routines. 1489 * 1490 * ntnode should be locked. 1491 */ 1492 int 1493 ntfs_readntvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip, 1494 struct ntvattr *vap, off_t roff, size_t rsize, void *rdata, size_t *initp, 1495 struct uio *uio) 1496 { 1497 int error = 0; 1498 off_t off; 1499 1500 *initp = 0; 1501 if (vap->va_flag & NTFS_AF_INRUN) { 1502 int cnt; 1503 cn_t ccn, ccl, cn, cl; 1504 caddr_t data = rdata; 1505 struct buf *bp; 1506 size_t left, tocopy; 1507 1508 DDPRINTF("ntfs_readntvattr_plain: data in run: %lu chains\n", 1509 vap->va_vruncnt); 1510 1511 off = roff; 1512 left = rsize; 1513 ccl = 0; 1514 ccn = 0; 1515 cnt = 0; 1516 while (left && (cnt < vap->va_vruncnt)) { 1517 ccn = vap->va_vruncn[cnt]; 1518 ccl = vap->va_vruncl[cnt]; 1519 1520 DDPRINTF("ntfs_readntvattr_plain: left %zu, " 1521 "cn: 0x%llx, cl: %llu, off: %lld\n", 1522 left, ccn, ccl, off); 1523 1524 if (ntfs_cntob(ccl) < off) { 1525 off -= ntfs_cntob(ccl); 1526 cnt++; 1527 continue; 1528 } 1529 if (ccn || ip->i_number == NTFS_BOOTINO) { 1530 ccl -= ntfs_btocn(off); 1531 cn = ccn + ntfs_btocn(off); 1532 off = ntfs_btocnoff(off); 1533 1534 while (left && ccl) { 1535 /* 1536 * Always read single clusters at a 1537 * time - we need to avoid reading 1538 * differently-sized blocks at the 1539 * same disk offsets to avoid 1540 * confusing the buffer cache. 1541 */ 1542 tocopy = MIN(left, 1543 ntfs_cntob(1) - off); 1544 cl = ntfs_btocl(tocopy + off); 1545 KASSERT(cl == 1 && 1546 tocopy <= ntfs_cntob(1)); 1547 1548 DDPRINTF("ntfs_readntvattr_plain: " 1549 "read: cn: 0x%llx cl: %llu, " 1550 "off: %lld, len: %zu, " 1551 "left: %zu\n", 1552 cn, cl, off, tocopy, left); 1553 error = bread(ntmp->ntm_devvp, 1554 ntfs_cntobn(cn), 1555 ntfs_cntob(cl), 1556 &bp); 1557 if (error) { 1558 brelse(bp); 1559 return (error); 1560 } 1561 if (uio) { 1562 error = uiomove(bp->b_data + off, 1563 tocopy, uio); 1564 if (error != 0) 1565 break; 1566 } else { 1567 memcpy(data, bp->b_data + off, 1568 tocopy); 1569 } 1570 brelse(bp); 1571 data = data + tocopy; 1572 *initp += tocopy; 1573 off = 0; 1574 left -= tocopy; 1575 cn += cl; 1576 ccl -= cl; 1577 } 1578 } else { 1579 tocopy = MIN(left, ntfs_cntob(ccl) - off); 1580 DDPRINTF("ntfs_readntvattr_plain: hole: " 1581 "ccn: 0x%llx ccl: %llu, off: %lld, " 1582 "len: %zu, left: %zu\n", 1583 ccn, ccl, off, tocopy, left); 1584 left -= tocopy; 1585 off = 0; 1586 if (uio) { 1587 size_t remains = tocopy; 1588 for(; remains; remains--) { 1589 error = uiomove("", 1, uio); 1590 if (error != 0) 1591 break; 1592 } 1593 } else 1594 bzero(data, tocopy); 1595 data = data + tocopy; 1596 } 1597 cnt++; 1598 if (error != 0) 1599 break; 1600 } 1601 if (left && error == 0) { 1602 printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n"); 1603 error = E2BIG; 1604 } 1605 } else { 1606 DDPRINTF("ntfs_readnvattr_plain: data is in mft record\n"); 1607 if (uio) 1608 error = uiomove(vap->va_datap + roff, rsize, uio); 1609 else 1610 memcpy(rdata, vap->va_datap + roff, rsize); 1611 *initp += rsize; 1612 } 1613 1614 return (error); 1615 } 1616 1617 /* 1618 * This is one of read routines. 1619 */ 1620 int 1621 ntfs_readattr_plain(struct ntfsmount *ntmp, struct ntnode *ip, 1622 u_int32_t attrnum, char *attrname, off_t roff, size_t rsize, void *rdata, 1623 size_t *initp, struct uio *uio) 1624 { 1625 size_t init; 1626 int error = 0; 1627 off_t off = roff; 1628 size_t left = rsize, toread; 1629 caddr_t data = rdata; 1630 struct ntvattr *vap; 1631 *initp = 0; 1632 1633 while (left) { 1634 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 1635 ntfs_btocn(off), &vap); 1636 if (error) 1637 return (error); 1638 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off); 1639 DDPRINTF("ntfs_readattr_plain: o: %lld, s: %zu " 1640 "(%llu - %llu)\n", off, toread, 1641 vap->va_vcnstart, vap->va_vcnend); 1642 error = ntfs_readntvattr_plain(ntmp, ip, vap, 1643 off - ntfs_cntob(vap->va_vcnstart), 1644 toread, data, &init, uio); 1645 if (error) { 1646 printf("ntfs_readattr_plain: ntfs_readntvattr_plain " 1647 "failed: o: %lld, s: %zu\n", off, toread); 1648 printf("ntfs_readattr_plain: attrib: %llu - %llu\n", 1649 vap->va_vcnstart, vap->va_vcnend); 1650 ntfs_ntvattrrele(vap); 1651 break; 1652 } 1653 ntfs_ntvattrrele(vap); 1654 left -= toread; 1655 off += toread; 1656 data = data + toread; 1657 *initp += init; 1658 } 1659 1660 return (error); 1661 } 1662 1663 /* 1664 * This is one of read routines. 1665 */ 1666 int 1667 ntfs_readattr(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t attrnum, 1668 char *attrname, off_t roff, size_t rsize, void *rdata, struct uio *uio) 1669 { 1670 int error = 0; 1671 struct ntvattr *vap; 1672 size_t init; 1673 1674 DDPRINTF("ntfs_readattr: reading %u: 0x%x, from %lld size %zu bytes\n", 1675 ip->i_number, attrnum, roff, rsize); 1676 1677 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap); 1678 if (error) 1679 return (error); 1680 1681 if ((roff > vap->va_datalen) || 1682 (roff + rsize > vap->va_datalen)) { 1683 printf("ntfs_readattr: offset too big: %lld (%lld) > %llu\n", 1684 roff, roff + rsize, vap->va_datalen); 1685 ntfs_ntvattrrele(vap); 1686 return (E2BIG); 1687 } 1688 if (vap->va_compression && vap->va_compressalg) { 1689 u_int8_t *cup; 1690 u_int8_t *uup; 1691 off_t off = roff; 1692 caddr_t data = rdata; 1693 cn_t cn; 1694 size_t left = rsize, tocopy; 1695 1696 DDPRINTF("ntfs_ntreadattr: compression: %u\n", 1697 vap->va_compressalg); 1698 1699 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL), M_NTFSDECOMP, 1700 M_WAITOK); 1701 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL), M_NTFSDECOMP, 1702 M_WAITOK); 1703 1704 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1)); 1705 off = roff - ntfs_cntob(cn); 1706 1707 while (left) { 1708 error = ntfs_readattr_plain(ntmp, ip, attrnum, 1709 attrname, ntfs_cntob(cn), 1710 ntfs_cntob(NTFS_COMPUNIT_CL), 1711 cup, &init, NULL); 1712 if (error) 1713 break; 1714 1715 tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off); 1716 1717 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) { 1718 if (uio) 1719 error = uiomove(cup + off, tocopy, uio); 1720 else 1721 memcpy(data, cup + off, tocopy); 1722 } else if (init == 0) { 1723 if (uio) { 1724 size_t remains = tocopy; 1725 for(; remains; remains--) { 1726 error = uiomove("", 1, uio); 1727 if (error != 0) 1728 break; 1729 } 1730 } 1731 else 1732 bzero(data, tocopy); 1733 } else { 1734 error = ntfs_uncompunit(ntmp, uup, cup); 1735 if (error) 1736 break; 1737 if (uio) 1738 error = uiomove(uup + off, tocopy, uio); 1739 else 1740 memcpy(data, uup + off, tocopy); 1741 } 1742 if (error) 1743 break; 1744 1745 left -= tocopy; 1746 data = data + tocopy; 1747 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL); 1748 cn += NTFS_COMPUNIT_CL; 1749 } 1750 1751 free(uup, M_NTFSDECOMP, 0); 1752 free(cup, M_NTFSDECOMP, 0); 1753 } else 1754 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname, 1755 roff, rsize, rdata, &init, uio); 1756 ntfs_ntvattrrele(vap); 1757 return (error); 1758 } 1759 1760 #if UNUSED_CODE 1761 int 1762 ntfs_parserun(cn_t *cn, cn_t *cl, u_int8_t *run, u_long len, u_long *off) 1763 { 1764 u_int8_t sz; 1765 int i; 1766 1767 if (NULL == run) { 1768 printf("ntfs_parsetun: run == NULL\n"); 1769 return (EINVAL); 1770 } 1771 sz = run[(*off)++]; 1772 if (0 == sz) { 1773 printf("ntfs_parserun: trying to go out of run\n"); 1774 return (E2BIG); 1775 } 1776 *cl = 0; 1777 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) { 1778 printf("ntfs_parserun: " \ 1779 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n", 1780 sz, len, *off); 1781 return (EINVAL); 1782 } 1783 for (i = 0; i < (sz & 0xF); i++) 1784 *cl += (u_int32_t) run[(*off)++] << (i << 3); 1785 1786 sz >>= 4; 1787 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) { 1788 printf("ntfs_parserun: " \ 1789 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n", 1790 sz, len, *off); 1791 return (EINVAL); 1792 } 1793 for (i = 0; i < (sz & 0xF); i++) 1794 *cn += (u_int32_t) run[(*off)++] << (i << 3); 1795 1796 return (0); 1797 } 1798 #endif 1799 1800 /* 1801 * Process fixup routine on given buffer. 1802 */ 1803 int 1804 ntfs_procfixups(struct ntfsmount *ntmp, u_int32_t magic, caddr_t buf, 1805 size_t len) 1806 { 1807 struct fixuphdr *fhp = (struct fixuphdr *) buf; 1808 int i; 1809 u_int16_t fixup; 1810 u_int16_t *fxp; 1811 u_int16_t *cfxp; 1812 1813 if (fhp->fh_magic != magic) { 1814 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n", 1815 fhp->fh_magic, magic); 1816 return (EINVAL); 1817 } 1818 if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) { 1819 printf("ntfs_procfixups: " \ 1820 "bad fixups number: %d for %ld bytes block\n", 1821 fhp->fh_fnum, (long)len); /* XXX printf kludge */ 1822 return (EINVAL); 1823 } 1824 if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) { 1825 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff); 1826 return (EINVAL); 1827 } 1828 fxp = (u_int16_t *) (buf + fhp->fh_foff); 1829 cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2); 1830 fixup = *fxp++; 1831 for (i = 1; i < fhp->fh_fnum; i++, fxp++) { 1832 if (*cfxp != fixup) { 1833 printf("ntfs_procfixups: fixup %d doesn't match\n", i); 1834 return (EINVAL); 1835 } 1836 *cfxp = *fxp; 1837 cfxp = (u_int16_t *)((caddr_t)cfxp + ntmp->ntm_bps); 1838 } 1839 return (0); 1840 } 1841 1842 #if UNUSED_CODE 1843 int 1844 ntfs_runtocn(cn_t *cn, struct ntfsmount *ntmp, u_int8_t *run, u_long len, 1845 cn_t vcn) 1846 { 1847 cn_t ccn = 0; 1848 cn_t ccl = 0; 1849 u_long off = 0; 1850 int error = 0; 1851 1852 #if NTFS_DEBUG 1853 int i; 1854 printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n", 1855 run, len, (u_long) vcn); 1856 printf("ntfs_runtocn: run: "); 1857 for (i = 0; i < len; i++) 1858 printf("0x%02x ", run[i]); 1859 printf("\n"); 1860 #endif 1861 1862 if (NULL == run) { 1863 printf("ntfs_runtocn: run == NULL\n"); 1864 return (EINVAL); 1865 } 1866 do { 1867 if (run[off] == 0) { 1868 printf("ntfs_runtocn: vcn too big\n"); 1869 return (E2BIG); 1870 } 1871 vcn -= ccl; 1872 error = ntfs_parserun(&ccn, &ccl, run, len, &off); 1873 if (error) { 1874 printf("ntfs_runtocn: ntfs_parserun failed\n"); 1875 return (error); 1876 } 1877 } while (ccl <= vcn); 1878 *cn = ccn + vcn; 1879 return (0); 1880 } 1881 #endif 1882 1883 /* 1884 * if the ntfs_toupper_tab[] is filled already, just raise use count; 1885 * otherwise read the data from the filesystem we are currently mounting 1886 */ 1887 int 1888 ntfs_toupper_use(struct mount *mp, struct ntfsmount *ntmp, struct proc *p) 1889 { 1890 int error = 0; 1891 struct vnode *vp; 1892 1893 /* get exclusive access */ 1894 rw_enter_write(&ntfs_toupper_lock); 1895 1896 /* only read the translation data from a file if it hasn't been 1897 * read already */ 1898 if (ntfs_toupper_tab) 1899 goto out; 1900 1901 /* 1902 * Read in Unicode lowercase -> uppercase translation file. 1903 * XXX for now, just the first 256 entries are used anyway, 1904 * so don't bother reading more 1905 */ 1906 ntfs_toupper_tab = malloc(256 * 256 * sizeof(wchar), M_NTFSRDATA, 1907 M_WAITOK); 1908 1909 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp))) 1910 goto out; 1911 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 1912 0, 256*256*sizeof(wchar), (char *) ntfs_toupper_tab, 1913 NULL); 1914 vput(vp); 1915 1916 out: 1917 ntfs_toupper_usecount++; 1918 rw_exit_write(&ntfs_toupper_lock); 1919 return (error); 1920 } 1921 1922 /* 1923 * lower the use count and if it reaches zero, free the memory 1924 * tied by toupper table 1925 */ 1926 void 1927 ntfs_toupper_unuse(struct proc *p) 1928 { 1929 /* get exclusive access */ 1930 rw_enter_write(&ntfs_toupper_lock); 1931 1932 ntfs_toupper_usecount--; 1933 if (ntfs_toupper_usecount == 0) { 1934 free(ntfs_toupper_tab, M_NTFSRDATA, 0); 1935 ntfs_toupper_tab = NULL; 1936 } 1937 #ifdef DIAGNOSTIC 1938 else if (ntfs_toupper_usecount < 0) { 1939 panic("ntfs_toupper_unuse(): use count negative: %d", 1940 ntfs_toupper_usecount); 1941 } 1942 #endif 1943 1944 /* release the lock */ 1945 rw_exit_write(&ntfs_toupper_lock); 1946 } 1947