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FreeBSD/Linux Kernel Cross Reference
sys/fs/udf/udf_vnops.c
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1 /*- 2 * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: releng/8.4/sys/fs/udf/udf_vnops.c 209826 2010-07-08 20:40:57Z avg $ 27 */ 28 29 /* udf_vnops.c */ 30 /* Take care of the vnode side of things */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/namei.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/stat.h> 38 #include <sys/bio.h> 39 #include <sys/conf.h> 40 #include <sys/buf.h> 41 #include <sys/iconv.h> 42 #include <sys/mount.h> 43 #include <sys/vnode.h> 44 #include <sys/dirent.h> 45 #include <sys/queue.h> 46 #include <sys/unistd.h> 47 #include <sys/endian.h> 48 49 #include <vm/uma.h> 50 51 #include <fs/fifofs/fifo.h> 52 #include <fs/udf/ecma167-udf.h> 53 #include <fs/udf/osta.h> 54 #include <fs/udf/udf.h> 55 #include <fs/udf/udf_mount.h> 56 57 extern struct iconv_functions *udf_iconv; 58 59 static vop_access_t udf_access; 60 static vop_getattr_t udf_getattr; 61 static vop_open_t udf_open; 62 static vop_ioctl_t udf_ioctl; 63 static vop_pathconf_t udf_pathconf; 64 static vop_print_t udf_print; 65 static vop_read_t udf_read; 66 static vop_readdir_t udf_readdir; 67 static vop_readlink_t udf_readlink; 68 static vop_setattr_t udf_setattr; 69 static vop_strategy_t udf_strategy; 70 static vop_bmap_t udf_bmap; 71 static vop_cachedlookup_t udf_lookup; 72 static vop_reclaim_t udf_reclaim; 73 static vop_vptofh_t udf_vptofh; 74 static int udf_readatoffset(struct udf_node *node, int *size, off_t offset, 75 struct buf **bp, uint8_t **data); 76 static int udf_bmap_internal(struct udf_node *node, off_t offset, 77 daddr_t *sector, uint32_t *max_size); 78 79 static struct vop_vector udf_vnodeops = { 80 .vop_default = &default_vnodeops, 81 82 .vop_access = udf_access, 83 .vop_bmap = udf_bmap, 84 .vop_cachedlookup = udf_lookup, 85 .vop_getattr = udf_getattr, 86 .vop_ioctl = udf_ioctl, 87 .vop_lookup = vfs_cache_lookup, 88 .vop_open = udf_open, 89 .vop_pathconf = udf_pathconf, 90 .vop_print = udf_print, 91 .vop_read = udf_read, 92 .vop_readdir = udf_readdir, 93 .vop_readlink = udf_readlink, 94 .vop_reclaim = udf_reclaim, 95 .vop_setattr = udf_setattr, 96 .vop_strategy = udf_strategy, 97 .vop_vptofh = udf_vptofh, 98 }; 99 100 struct vop_vector udf_fifoops = { 101 .vop_default = &fifo_specops, 102 .vop_access = udf_access, 103 .vop_getattr = udf_getattr, 104 .vop_print = udf_print, 105 .vop_reclaim = udf_reclaim, 106 .vop_setattr = udf_setattr, 107 .vop_vptofh = udf_vptofh, 108 }; 109 110 MALLOC_DEFINE(M_UDFFID, "udf_fid", "UDF FileId structure"); 111 MALLOC_DEFINE(M_UDFDS, "udf_ds", "UDF Dirstream structure"); 112 113 #define UDF_INVALID_BMAP -1 114 115 int 116 udf_allocv(struct mount *mp, struct vnode **vpp, struct thread *td) 117 { 118 int error; 119 struct vnode *vp; 120 121 error = getnewvnode("udf", mp, &udf_vnodeops, &vp); 122 if (error) { 123 printf("udf_allocv: failed to allocate new vnode\n"); 124 return (error); 125 } 126 127 *vpp = vp; 128 return (0); 129 } 130 131 /* Convert file entry permission (5 bits per owner/group/user) to a mode_t */ 132 static mode_t 133 udf_permtomode(struct udf_node *node) 134 { 135 uint32_t perm; 136 uint16_t flags; 137 mode_t mode; 138 139 perm = le32toh(node->fentry->perm); 140 flags = le16toh(node->fentry->icbtag.flags); 141 142 mode = perm & UDF_FENTRY_PERM_USER_MASK; 143 mode |= ((perm & UDF_FENTRY_PERM_GRP_MASK) >> 2); 144 mode |= ((perm & UDF_FENTRY_PERM_OWNER_MASK) >> 4); 145 mode |= ((flags & UDF_ICB_TAG_FLAGS_STICKY) << 4); 146 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETGID) << 6); 147 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETUID) << 8); 148 149 return (mode); 150 } 151 152 static int 153 udf_access(struct vop_access_args *a) 154 { 155 struct vnode *vp; 156 struct udf_node *node; 157 accmode_t accmode; 158 mode_t mode; 159 160 vp = a->a_vp; 161 node = VTON(vp); 162 accmode = a->a_accmode; 163 164 if (accmode & VWRITE) { 165 switch (vp->v_type) { 166 case VDIR: 167 case VLNK: 168 case VREG: 169 return (EROFS); 170 /* NOT REACHED */ 171 default: 172 break; 173 } 174 } 175 176 mode = udf_permtomode(node); 177 178 return (vaccess(vp->v_type, mode, node->fentry->uid, node->fentry->gid, 179 accmode, a->a_cred, NULL)); 180 } 181 182 static int 183 udf_open(struct vop_open_args *ap) { 184 struct udf_node *np = VTON(ap->a_vp); 185 off_t fsize; 186 187 fsize = le64toh(np->fentry->inf_len); 188 vnode_create_vobject(ap->a_vp, fsize, ap->a_td); 189 return 0; 190 } 191 192 static const int mon_lens[2][12] = { 193 {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334}, 194 {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335} 195 }; 196 197 static int 198 udf_isaleapyear(int year) 199 { 200 int i; 201 202 i = (year % 4) ? 0 : 1; 203 i &= (year % 100) ? 1 : 0; 204 i |= (year % 400) ? 0 : 1; 205 206 return i; 207 } 208 209 /* 210 * Timezone calculation compliments of Julian Elischer <julian@elischer.org>. 211 */ 212 static void 213 udf_timetotimespec(struct timestamp *time, struct timespec *t) 214 { 215 int i, lpyear, daysinyear, year, startyear; 216 union { 217 uint16_t u_tz_offset; 218 int16_t s_tz_offset; 219 } tz; 220 221 /* 222 * DirectCD seems to like using bogus year values. 223 * Don't trust time->month as it will be used for an array index. 224 */ 225 year = le16toh(time->year); 226 if (year < 1970 || time->month < 1 || time->month > 12) { 227 t->tv_sec = 0; 228 t->tv_nsec = 0; 229 return; 230 } 231 232 /* Calculate the time and day */ 233 t->tv_sec = time->second; 234 t->tv_sec += time->minute * 60; 235 t->tv_sec += time->hour * 3600; 236 t->tv_sec += (time->day - 1) * 3600 * 24; 237 238 /* Calculate the month */ 239 lpyear = udf_isaleapyear(year); 240 t->tv_sec += mon_lens[lpyear][time->month - 1] * 3600 * 24; 241 242 /* Speed up the calculation */ 243 startyear = 1970; 244 if (year > 2009) { 245 t->tv_sec += 1262304000; 246 startyear += 40; 247 } else if (year > 1999) { 248 t->tv_sec += 946684800; 249 startyear += 30; 250 } else if (year > 1989) { 251 t->tv_sec += 631152000; 252 startyear += 20; 253 } else if (year > 1979) { 254 t->tv_sec += 315532800; 255 startyear += 10; 256 } 257 258 daysinyear = (year - startyear) * 365; 259 for (i = startyear; i < year; i++) 260 daysinyear += udf_isaleapyear(i); 261 t->tv_sec += daysinyear * 3600 * 24; 262 263 /* Calculate microseconds */ 264 t->tv_nsec = time->centisec * 10000 + time->hund_usec * 100 + 265 time->usec; 266 267 /* 268 * Calculate the time zone. The timezone is 12 bit signed 2's 269 * complement, so we gotta do some extra magic to handle it right. 270 */ 271 tz.u_tz_offset = le16toh(time->type_tz); 272 tz.u_tz_offset &= 0x0fff; 273 if (tz.u_tz_offset & 0x0800) 274 tz.u_tz_offset |= 0xf000; /* extend the sign to 16 bits */ 275 if ((le16toh(time->type_tz) & 0x1000) && (tz.s_tz_offset != -2047)) 276 t->tv_sec -= tz.s_tz_offset * 60; 277 278 return; 279 } 280 281 static int 282 udf_getattr(struct vop_getattr_args *a) 283 { 284 struct vnode *vp; 285 struct udf_node *node; 286 struct vattr *vap; 287 struct file_entry *fentry; 288 struct timespec ts; 289 290 ts.tv_sec = 0; 291 292 vp = a->a_vp; 293 vap = a->a_vap; 294 node = VTON(vp); 295 fentry = node->fentry; 296 297 vap->va_fsid = dev2udev(node->udfmp->im_dev); 298 vap->va_fileid = node->hash_id; 299 vap->va_mode = udf_permtomode(node); 300 vap->va_nlink = le16toh(fentry->link_cnt); 301 /* 302 * XXX The spec says that -1 is valid for uid/gid and indicates an 303 * invalid uid/gid. How should this be represented? 304 */ 305 vap->va_uid = (le32toh(fentry->uid) == -1) ? 0 : le32toh(fentry->uid); 306 vap->va_gid = (le32toh(fentry->gid) == -1) ? 0 : le32toh(fentry->gid); 307 udf_timetotimespec(&fentry->atime, &vap->va_atime); 308 udf_timetotimespec(&fentry->mtime, &vap->va_mtime); 309 vap->va_ctime = vap->va_mtime; /* XXX Stored as an Extended Attribute */ 310 vap->va_rdev = NODEV; 311 if (vp->v_type & VDIR) { 312 /* 313 * Directories that are recorded within their ICB will show 314 * as having 0 blocks recorded. Since tradition dictates 315 * that directories consume at least one logical block, 316 * make it appear so. 317 */ 318 if (fentry->logblks_rec != 0) { 319 vap->va_size = 320 le64toh(fentry->logblks_rec) * node->udfmp->bsize; 321 } else { 322 vap->va_size = node->udfmp->bsize; 323 } 324 } else { 325 vap->va_size = le64toh(fentry->inf_len); 326 } 327 vap->va_flags = 0; 328 vap->va_gen = 1; 329 vap->va_blocksize = node->udfmp->bsize; 330 vap->va_bytes = le64toh(fentry->inf_len); 331 vap->va_type = vp->v_type; 332 vap->va_filerev = 0; /* XXX */ 333 return (0); 334 } 335 336 static int 337 udf_setattr(struct vop_setattr_args *a) 338 { 339 struct vnode *vp; 340 struct vattr *vap; 341 342 vp = a->a_vp; 343 vap = a->a_vap; 344 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 345 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 346 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 347 return (EROFS); 348 if (vap->va_size != (u_quad_t)VNOVAL) { 349 switch (vp->v_type) { 350 case VDIR: 351 return (EISDIR); 352 case VLNK: 353 case VREG: 354 return (EROFS); 355 case VCHR: 356 case VBLK: 357 case VSOCK: 358 case VFIFO: 359 case VNON: 360 case VBAD: 361 case VMARKER: 362 return (0); 363 } 364 } 365 return (0); 366 } 367 368 /* 369 * File specific ioctls. 370 */ 371 static int 372 udf_ioctl(struct vop_ioctl_args *a) 373 { 374 printf("%s called\n", __func__); 375 return (ENOTTY); 376 } 377 378 /* 379 * I'm not sure that this has much value in a read-only filesystem, but 380 * cd9660 has it too. 381 */ 382 static int 383 udf_pathconf(struct vop_pathconf_args *a) 384 { 385 386 switch (a->a_name) { 387 case _PC_LINK_MAX: 388 *a->a_retval = 65535; 389 return (0); 390 case _PC_NAME_MAX: 391 *a->a_retval = NAME_MAX; 392 return (0); 393 case _PC_PATH_MAX: 394 *a->a_retval = PATH_MAX; 395 return (0); 396 case _PC_NO_TRUNC: 397 *a->a_retval = 1; 398 return (0); 399 default: 400 return (EINVAL); 401 } 402 } 403 404 static int 405 udf_print(struct vop_print_args *ap) 406 { 407 struct vnode *vp = ap->a_vp; 408 struct udf_node *node = VTON(vp); 409 410 printf(" ino %lu, on dev %s", (u_long)node->hash_id, 411 devtoname(node->udfmp->im_dev)); 412 if (vp->v_type == VFIFO) 413 fifo_printinfo(vp); 414 printf("\n"); 415 return (0); 416 } 417 418 #define lblkno(udfmp, loc) ((loc) >> (udfmp)->bshift) 419 #define blkoff(udfmp, loc) ((loc) & (udfmp)->bmask) 420 #define lblktosize(udfmp, blk) ((blk) << (udfmp)->bshift) 421 422 static inline int 423 is_data_in_fentry(const struct udf_node *node) 424 { 425 const struct file_entry *fentry = node->fentry; 426 427 return ((le16toh(fentry->icbtag.flags) & 0x7) == 3); 428 } 429 430 static int 431 udf_read(struct vop_read_args *ap) 432 { 433 struct vnode *vp = ap->a_vp; 434 struct uio *uio = ap->a_uio; 435 struct udf_node *node = VTON(vp); 436 struct udf_mnt *udfmp; 437 struct file_entry *fentry; 438 struct buf *bp; 439 uint8_t *data; 440 daddr_t lbn, rablock; 441 off_t diff, fsize; 442 int error = 0; 443 long size, n, on; 444 445 if (uio->uio_resid == 0) 446 return (0); 447 if (uio->uio_offset < 0) 448 return (EINVAL); 449 450 if (is_data_in_fentry(node)) { 451 fentry = node->fentry; 452 data = &fentry->data[le32toh(fentry->l_ea)]; 453 fsize = le32toh(fentry->l_ad); 454 455 n = uio->uio_resid; 456 diff = fsize - uio->uio_offset; 457 if (diff <= 0) 458 return (0); 459 if (diff < n) 460 n = diff; 461 error = uiomove(data + uio->uio_offset, (int)n, uio); 462 return (error); 463 } 464 465 fsize = le64toh(node->fentry->inf_len); 466 udfmp = node->udfmp; 467 do { 468 lbn = lblkno(udfmp, uio->uio_offset); 469 on = blkoff(udfmp, uio->uio_offset); 470 n = min((u_int)(udfmp->bsize - on), 471 uio->uio_resid); 472 diff = fsize - uio->uio_offset; 473 if (diff <= 0) 474 return (0); 475 if (diff < n) 476 n = diff; 477 size = udfmp->bsize; 478 rablock = lbn + 1; 479 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 480 if (lblktosize(udfmp, rablock) < fsize) { 481 error = cluster_read(vp, fsize, lbn, size, NOCRED, 482 uio->uio_resid, (ap->a_ioflag >> 16), &bp); 483 } else { 484 error = bread(vp, lbn, size, NOCRED, &bp); 485 } 486 } else { 487 error = bread(vp, lbn, size, NOCRED, &bp); 488 } 489 n = min(n, size - bp->b_resid); 490 if (error) { 491 brelse(bp); 492 return (error); 493 } 494 495 error = uiomove(bp->b_data + on, (int)n, uio); 496 brelse(bp); 497 } while (error == 0 && uio->uio_resid > 0 && n != 0); 498 return (error); 499 } 500 501 /* 502 * Call the OSTA routines to translate the name from a CS0 dstring to a 503 * 16-bit Unicode String. Hooks need to be placed in here to translate from 504 * Unicode to the encoding that the kernel/user expects. Return the length 505 * of the translated string. 506 */ 507 static int 508 udf_transname(char *cs0string, char *destname, int len, struct udf_mnt *udfmp) 509 { 510 unicode_t *transname; 511 char *unibuf, *unip; 512 int i, destlen; 513 ssize_t unilen = 0; 514 size_t destleft = MAXNAMLEN; 515 516 /* Convert 16-bit Unicode to destname */ 517 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 518 /* allocate a buffer big enough to hold an 8->16 bit expansion */ 519 unibuf = uma_zalloc(udf_zone_trans, M_WAITOK); 520 unip = unibuf; 521 if ((unilen = (ssize_t)udf_UncompressUnicodeByte(len, cs0string, unibuf)) == -1) { 522 printf("udf: Unicode translation failed\n"); 523 uma_zfree(udf_zone_trans, unibuf); 524 return 0; 525 } 526 527 while (unilen > 0 && destleft > 0) { 528 udf_iconv->conv(udfmp->im_d2l, (const char **)&unibuf, 529 (size_t *)&unilen, (char **)&destname, &destleft); 530 /* Unconverted character found */ 531 if (unilen > 0 && destleft > 0) { 532 *destname++ = '?'; 533 destleft--; 534 unibuf += 2; 535 unilen -= 2; 536 } 537 } 538 uma_zfree(udf_zone_trans, unip); 539 *destname = '\0'; 540 destlen = MAXNAMLEN - (int)destleft; 541 } else { 542 /* allocate a buffer big enough to hold an 8->16 bit expansion */ 543 transname = uma_zalloc(udf_zone_trans, M_WAITOK); 544 545 if ((unilen = (ssize_t)udf_UncompressUnicode(len, cs0string, transname)) == -1) { 546 printf("udf: Unicode translation failed\n"); 547 uma_zfree(udf_zone_trans, transname); 548 return 0; 549 } 550 551 for (i = 0; i < unilen ; i++) { 552 if (transname[i] & 0xff00) { 553 destname[i] = '.'; /* Fudge the 16bit chars */ 554 } else { 555 destname[i] = transname[i] & 0xff; 556 } 557 } 558 uma_zfree(udf_zone_trans, transname); 559 destname[unilen] = 0; 560 destlen = (int)unilen; 561 } 562 563 return (destlen); 564 } 565 566 /* 567 * Compare a CS0 dstring with a name passed in from the VFS layer. Return 568 * 0 on a successful match, nonzero otherwise. Unicode work may need to be done 569 * here also. 570 */ 571 static int 572 udf_cmpname(char *cs0string, char *cmpname, int cs0len, int cmplen, struct udf_mnt *udfmp) 573 { 574 char *transname; 575 int error = 0; 576 577 /* This is overkill, but not worth creating a new zone */ 578 transname = uma_zalloc(udf_zone_trans, M_WAITOK); 579 580 cs0len = udf_transname(cs0string, transname, cs0len, udfmp); 581 582 /* Easy check. If they aren't the same length, they aren't equal */ 583 if ((cs0len == 0) || (cs0len != cmplen)) 584 error = -1; 585 else 586 error = bcmp(transname, cmpname, cmplen); 587 588 uma_zfree(udf_zone_trans, transname); 589 return (error); 590 } 591 592 struct udf_uiodir { 593 struct dirent *dirent; 594 u_long *cookies; 595 int ncookies; 596 int acookies; 597 int eofflag; 598 }; 599 600 static int 601 udf_uiodir(struct udf_uiodir *uiodir, int de_size, struct uio *uio, long cookie) 602 { 603 if (uiodir->cookies != NULL) { 604 if (++uiodir->acookies > uiodir->ncookies) { 605 uiodir->eofflag = 0; 606 return (-1); 607 } 608 *uiodir->cookies++ = cookie; 609 } 610 611 if (uio->uio_resid < de_size) { 612 uiodir->eofflag = 0; 613 return (-1); 614 } 615 616 return (uiomove(uiodir->dirent, de_size, uio)); 617 } 618 619 static struct udf_dirstream * 620 udf_opendir(struct udf_node *node, int offset, int fsize, struct udf_mnt *udfmp) 621 { 622 struct udf_dirstream *ds; 623 624 ds = uma_zalloc(udf_zone_ds, M_WAITOK | M_ZERO); 625 626 ds->node = node; 627 ds->offset = offset; 628 ds->udfmp = udfmp; 629 ds->fsize = fsize; 630 631 return (ds); 632 } 633 634 static struct fileid_desc * 635 udf_getfid(struct udf_dirstream *ds) 636 { 637 struct fileid_desc *fid; 638 int error, frag_size = 0, total_fid_size; 639 640 /* End of directory? */ 641 if (ds->offset + ds->off >= ds->fsize) { 642 ds->error = 0; 643 return (NULL); 644 } 645 646 /* Grab the first extent of the directory */ 647 if (ds->off == 0) { 648 ds->size = 0; 649 error = udf_readatoffset(ds->node, &ds->size, ds->offset, 650 &ds->bp, &ds->data); 651 if (error) { 652 ds->error = error; 653 if (ds->bp != NULL) 654 brelse(ds->bp); 655 return (NULL); 656 } 657 } 658 659 /* 660 * Clean up from a previous fragmented FID. 661 * XXX Is this the right place for this? 662 */ 663 if (ds->fid_fragment && ds->buf != NULL) { 664 ds->fid_fragment = 0; 665 free(ds->buf, M_UDFFID); 666 } 667 668 fid = (struct fileid_desc*)&ds->data[ds->off]; 669 670 /* 671 * Check to see if the fid is fragmented. The first test 672 * ensures that we don't wander off the end of the buffer 673 * looking for the l_iu and l_fi fields. 674 */ 675 if (ds->off + UDF_FID_SIZE > ds->size || 676 ds->off + le16toh(fid->l_iu) + fid->l_fi + UDF_FID_SIZE > ds->size){ 677 678 /* Copy what we have of the fid into a buffer */ 679 frag_size = ds->size - ds->off; 680 if (frag_size >= ds->udfmp->bsize) { 681 printf("udf: invalid FID fragment\n"); 682 ds->error = EINVAL; 683 return (NULL); 684 } 685 686 /* 687 * File ID descriptors can only be at most one 688 * logical sector in size. 689 */ 690 ds->buf = malloc(ds->udfmp->bsize, M_UDFFID, 691 M_WAITOK | M_ZERO); 692 bcopy(fid, ds->buf, frag_size); 693 694 /* Reduce all of the casting magic */ 695 fid = (struct fileid_desc*)ds->buf; 696 697 if (ds->bp != NULL) 698 brelse(ds->bp); 699 700 /* Fetch the next allocation */ 701 ds->offset += ds->size; 702 ds->size = 0; 703 error = udf_readatoffset(ds->node, &ds->size, ds->offset, 704 &ds->bp, &ds->data); 705 if (error) { 706 ds->error = error; 707 return (NULL); 708 } 709 710 /* 711 * If the fragment was so small that we didn't get 712 * the l_iu and l_fi fields, copy those in. 713 */ 714 if (frag_size < UDF_FID_SIZE) 715 bcopy(ds->data, &ds->buf[frag_size], 716 UDF_FID_SIZE - frag_size); 717 718 /* 719 * Now that we have enough of the fid to work with, 720 * copy in the rest of the fid from the new 721 * allocation. 722 */ 723 total_fid_size = UDF_FID_SIZE + le16toh(fid->l_iu) + fid->l_fi; 724 if (total_fid_size > ds->udfmp->bsize) { 725 printf("udf: invalid FID\n"); 726 ds->error = EIO; 727 return (NULL); 728 } 729 bcopy(ds->data, &ds->buf[frag_size], 730 total_fid_size - frag_size); 731 732 ds->fid_fragment = 1; 733 } else { 734 total_fid_size = le16toh(fid->l_iu) + fid->l_fi + UDF_FID_SIZE; 735 } 736 737 /* 738 * Update the offset. Align on a 4 byte boundary because the 739 * UDF spec says so. 740 */ 741 ds->this_off = ds->offset + ds->off; 742 if (!ds->fid_fragment) { 743 ds->off += (total_fid_size + 3) & ~0x03; 744 } else { 745 ds->off = (total_fid_size - frag_size + 3) & ~0x03; 746 } 747 748 return (fid); 749 } 750 751 static void 752 udf_closedir(struct udf_dirstream *ds) 753 { 754 755 if (ds->bp != NULL) 756 brelse(ds->bp); 757 758 if (ds->fid_fragment && ds->buf != NULL) 759 free(ds->buf, M_UDFFID); 760 761 uma_zfree(udf_zone_ds, ds); 762 } 763 764 static int 765 udf_readdir(struct vop_readdir_args *a) 766 { 767 struct vnode *vp; 768 struct uio *uio; 769 struct dirent dir; 770 struct udf_node *node; 771 struct udf_mnt *udfmp; 772 struct fileid_desc *fid; 773 struct udf_uiodir uiodir; 774 struct udf_dirstream *ds; 775 u_long *cookies = NULL; 776 int ncookies; 777 int error = 0; 778 779 vp = a->a_vp; 780 uio = a->a_uio; 781 node = VTON(vp); 782 udfmp = node->udfmp; 783 uiodir.eofflag = 1; 784 785 if (a->a_ncookies != NULL) { 786 /* 787 * Guess how many entries are needed. If we run out, this 788 * function will be called again and thing will pick up were 789 * it left off. 790 */ 791 ncookies = uio->uio_resid / 8; 792 cookies = malloc(sizeof(u_long) * ncookies, 793 M_TEMP, M_WAITOK); 794 if (cookies == NULL) 795 return (ENOMEM); 796 uiodir.ncookies = ncookies; 797 uiodir.cookies = cookies; 798 uiodir.acookies = 0; 799 } else { 800 uiodir.cookies = NULL; 801 } 802 803 /* 804 * Iterate through the file id descriptors. Give the parent dir 805 * entry special attention. 806 */ 807 ds = udf_opendir(node, uio->uio_offset, le64toh(node->fentry->inf_len), 808 node->udfmp); 809 810 while ((fid = udf_getfid(ds)) != NULL) { 811 812 /* XXX Should we return an error on a bad fid? */ 813 if (udf_checktag(&fid->tag, TAGID_FID)) { 814 printf("Invalid FID tag\n"); 815 hexdump(fid, UDF_FID_SIZE, NULL, 0); 816 error = EIO; 817 break; 818 } 819 820 /* Is this a deleted file? */ 821 if (fid->file_char & UDF_FILE_CHAR_DEL) 822 continue; 823 824 if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) { 825 /* Do up the '.' and '..' entries. Dummy values are 826 * used for the cookies since the offset here is 827 * usually zero, and NFS doesn't like that value 828 */ 829 dir.d_fileno = node->hash_id; 830 dir.d_type = DT_DIR; 831 dir.d_name[0] = '.'; 832 dir.d_name[1] = '\0'; 833 dir.d_namlen = 1; 834 dir.d_reclen = GENERIC_DIRSIZ(&dir); 835 uiodir.dirent = &dir; 836 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 1); 837 if (error) 838 break; 839 840 dir.d_fileno = udf_getid(&fid->icb); 841 dir.d_type = DT_DIR; 842 dir.d_name[0] = '.'; 843 dir.d_name[1] = '.'; 844 dir.d_name[2] = '\0'; 845 dir.d_namlen = 2; 846 dir.d_reclen = GENERIC_DIRSIZ(&dir); 847 uiodir.dirent = &dir; 848 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 2); 849 } else { 850 dir.d_namlen = udf_transname(&fid->data[fid->l_iu], 851 &dir.d_name[0], fid->l_fi, udfmp); 852 dir.d_fileno = udf_getid(&fid->icb); 853 dir.d_type = (fid->file_char & UDF_FILE_CHAR_DIR) ? 854 DT_DIR : DT_UNKNOWN; 855 dir.d_reclen = GENERIC_DIRSIZ(&dir); 856 uiodir.dirent = &dir; 857 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 858 ds->this_off); 859 } 860 if (error) 861 break; 862 uio->uio_offset = ds->offset + ds->off; 863 } 864 865 /* tell the calling layer whether we need to be called again */ 866 *a->a_eofflag = uiodir.eofflag; 867 868 if (error < 0) 869 error = 0; 870 if (!error) 871 error = ds->error; 872 873 udf_closedir(ds); 874 875 if (a->a_ncookies != NULL) { 876 if (error) 877 free(cookies, M_TEMP); 878 else { 879 *a->a_ncookies = uiodir.acookies; 880 *a->a_cookies = cookies; 881 } 882 } 883 884 return (error); 885 } 886 887 static int 888 udf_readlink(struct vop_readlink_args *ap) 889 { 890 struct path_component *pc, *end; 891 struct vnode *vp; 892 struct uio uio; 893 struct iovec iov[1]; 894 struct udf_node *node; 895 void *buf; 896 char *cp; 897 int error, len, root; 898 899 /* 900 * A symbolic link in UDF is a list of variable-length path 901 * component structures. We build a pathname in the caller's 902 * uio by traversing this list. 903 */ 904 vp = ap->a_vp; 905 node = VTON(vp); 906 len = le64toh(node->fentry->inf_len); 907 buf = malloc(len, M_DEVBUF, M_WAITOK); 908 iov[0].iov_len = len; 909 iov[0].iov_base = buf; 910 uio.uio_iov = iov; 911 uio.uio_iovcnt = 1; 912 uio.uio_offset = 0; 913 uio.uio_resid = iov[0].iov_len; 914 uio.uio_segflg = UIO_SYSSPACE; 915 uio.uio_rw = UIO_READ; 916 uio.uio_td = curthread; 917 error = VOP_READ(vp, &uio, 0, ap->a_cred); 918 if (error) 919 goto error; 920 921 pc = buf; 922 end = (void *)((char *)buf + len); 923 root = 0; 924 while (pc < end) { 925 switch (pc->type) { 926 case UDF_PATH_ROOT: 927 /* Only allow this at the beginning of a path. */ 928 if ((void *)pc != buf) { 929 error = EINVAL; 930 goto error; 931 } 932 cp = "/"; 933 len = 1; 934 root = 1; 935 break; 936 case UDF_PATH_DOT: 937 cp = "."; 938 len = 1; 939 break; 940 case UDF_PATH_DOTDOT: 941 cp = ".."; 942 len = 2; 943 break; 944 case UDF_PATH_PATH: 945 if (pc->length == 0) { 946 error = EINVAL; 947 goto error; 948 } 949 /* 950 * XXX: We only support CS8 which appears to map 951 * to ASCII directly. 952 */ 953 switch (pc->identifier[0]) { 954 case 8: 955 cp = pc->identifier + 1; 956 len = pc->length - 1; 957 break; 958 default: 959 error = EOPNOTSUPP; 960 goto error; 961 } 962 break; 963 default: 964 error = EINVAL; 965 goto error; 966 } 967 968 /* 969 * If this is not the first component, insert a path 970 * separator. 971 */ 972 if (pc != buf) { 973 /* If we started with root we already have a "/". */ 974 if (root) 975 goto skipslash; 976 root = 0; 977 if (ap->a_uio->uio_resid < 1) { 978 error = ENAMETOOLONG; 979 goto error; 980 } 981 error = uiomove("/", 1, ap->a_uio); 982 if (error) 983 break; 984 } 985 skipslash: 986 987 /* Append string at 'cp' of length 'len' to our path. */ 988 if (len > ap->a_uio->uio_resid) { 989 error = ENAMETOOLONG; 990 goto error; 991 } 992 error = uiomove(cp, len, ap->a_uio); 993 if (error) 994 break; 995 996 /* Advance to next component. */ 997 pc = (void *)((char *)pc + 4 + pc->length); 998 } 999 error: 1000 free(buf, M_DEVBUF); 1001 return (error); 1002 } 1003 1004 static int 1005 udf_strategy(struct vop_strategy_args *a) 1006 { 1007 struct buf *bp; 1008 struct vnode *vp; 1009 struct udf_node *node; 1010 struct bufobj *bo; 1011 off_t offset; 1012 uint32_t maxsize; 1013 daddr_t sector; 1014 int error; 1015 1016 bp = a->a_bp; 1017 vp = a->a_vp; 1018 node = VTON(vp); 1019 1020 if (bp->b_blkno == bp->b_lblkno) { 1021 offset = lblktosize(node->udfmp, bp->b_lblkno); 1022 error = udf_bmap_internal(node, offset, §or, &maxsize); 1023 if (error) { 1024 clrbuf(bp); 1025 bp->b_blkno = -1; 1026 bufdone(bp); 1027 return (0); 1028 } 1029 /* bmap gives sector numbers, bio works with device blocks */ 1030 bp->b_blkno = sector << (node->udfmp->bshift - DEV_BSHIFT); 1031 } 1032 bo = node->udfmp->im_bo; 1033 bp->b_iooffset = dbtob(bp->b_blkno); 1034 BO_STRATEGY(bo, bp); 1035 return (0); 1036 } 1037 1038 static int 1039 udf_bmap(struct vop_bmap_args *a) 1040 { 1041 struct udf_node *node; 1042 uint32_t max_size; 1043 daddr_t lsector; 1044 int nblk; 1045 int error; 1046 1047 node = VTON(a->a_vp); 1048 1049 if (a->a_bop != NULL) 1050 *a->a_bop = &node->udfmp->im_devvp->v_bufobj; 1051 if (a->a_bnp == NULL) 1052 return (0); 1053 if (a->a_runb) 1054 *a->a_runb = 0; 1055 1056 /* 1057 * UDF_INVALID_BMAP means data embedded into fentry, this is an internal 1058 * error that should not be propagated to calling code. 1059 * Most obvious mapping for this error is EOPNOTSUPP as we can not truly 1060 * translate block numbers in this case. 1061 * Incidentally, this return code will make vnode pager to use VOP_READ 1062 * to get data for mmap-ed pages and udf_read knows how to do the right 1063 * thing for this kind of files. 1064 */ 1065 error = udf_bmap_internal(node, a->a_bn << node->udfmp->bshift, 1066 &lsector, &max_size); 1067 if (error == UDF_INVALID_BMAP) 1068 return (EOPNOTSUPP); 1069 if (error) 1070 return (error); 1071 1072 /* Translate logical to physical sector number */ 1073 *a->a_bnp = lsector << (node->udfmp->bshift - DEV_BSHIFT); 1074 1075 /* 1076 * Determine maximum number of readahead blocks following the 1077 * requested block. 1078 */ 1079 if (a->a_runp) { 1080 nblk = (max_size >> node->udfmp->bshift) - 1; 1081 if (nblk <= 0) 1082 *a->a_runp = 0; 1083 else if (nblk >= (MAXBSIZE >> node->udfmp->bshift)) 1084 *a->a_runp = (MAXBSIZE >> node->udfmp->bshift) - 1; 1085 else 1086 *a->a_runp = nblk; 1087 } 1088 1089 if (a->a_runb) { 1090 *a->a_runb = 0; 1091 } 1092 1093 return (0); 1094 } 1095 1096 /* 1097 * The all powerful VOP_LOOKUP(). 1098 */ 1099 static int 1100 udf_lookup(struct vop_cachedlookup_args *a) 1101 { 1102 struct vnode *dvp; 1103 struct vnode *tdp = NULL; 1104 struct vnode **vpp = a->a_vpp; 1105 struct udf_node *node; 1106 struct udf_mnt *udfmp; 1107 struct fileid_desc *fid = NULL; 1108 struct udf_dirstream *ds; 1109 u_long nameiop; 1110 u_long flags; 1111 char *nameptr; 1112 long namelen; 1113 ino_t id = 0; 1114 int offset, error = 0; 1115 int fsize, lkflags, ltype, numdirpasses; 1116 1117 dvp = a->a_dvp; 1118 node = VTON(dvp); 1119 udfmp = node->udfmp; 1120 nameiop = a->a_cnp->cn_nameiop; 1121 flags = a->a_cnp->cn_flags; 1122 lkflags = a->a_cnp->cn_lkflags; 1123 nameptr = a->a_cnp->cn_nameptr; 1124 namelen = a->a_cnp->cn_namelen; 1125 fsize = le64toh(node->fentry->inf_len); 1126 1127 /* 1128 * If this is a LOOKUP and we've already partially searched through 1129 * the directory, pick up where we left off and flag that the 1130 * directory may need to be searched twice. For a full description, 1131 * see /sys/fs/cd9660/cd9660_lookup.c:cd9660_lookup() 1132 */ 1133 if (nameiop != LOOKUP || node->diroff == 0 || node->diroff > fsize) { 1134 offset = 0; 1135 numdirpasses = 1; 1136 } else { 1137 offset = node->diroff; 1138 numdirpasses = 2; 1139 nchstats.ncs_2passes++; 1140 } 1141 1142 lookloop: 1143 ds = udf_opendir(node, offset, fsize, udfmp); 1144 1145 while ((fid = udf_getfid(ds)) != NULL) { 1146 1147 /* XXX Should we return an error on a bad fid? */ 1148 if (udf_checktag(&fid->tag, TAGID_FID)) { 1149 printf("udf_lookup: Invalid tag\n"); 1150 error = EIO; 1151 break; 1152 } 1153 1154 /* Is this a deleted file? */ 1155 if (fid->file_char & UDF_FILE_CHAR_DEL) 1156 continue; 1157 1158 if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) { 1159 if (flags & ISDOTDOT) { 1160 id = udf_getid(&fid->icb); 1161 break; 1162 } 1163 } else { 1164 if (!(udf_cmpname(&fid->data[fid->l_iu], 1165 nameptr, fid->l_fi, namelen, udfmp))) { 1166 id = udf_getid(&fid->icb); 1167 break; 1168 } 1169 } 1170 } 1171 1172 if (!error) 1173 error = ds->error; 1174 1175 /* XXX Bail out here? */ 1176 if (error) { 1177 udf_closedir(ds); 1178 return (error); 1179 } 1180 1181 /* Did we have a match? */ 1182 if (id) { 1183 /* 1184 * Remember where this entry was if it's the final 1185 * component. 1186 */ 1187 if ((flags & ISLASTCN) && nameiop == LOOKUP) 1188 node->diroff = ds->offset + ds->off; 1189 if (numdirpasses == 2) 1190 nchstats.ncs_pass2++; 1191 udf_closedir(ds); 1192 1193 if (flags & ISDOTDOT) { 1194 error = vn_vget_ino(dvp, id, lkflags, &tdp); 1195 } else if (node->hash_id == id) { 1196 VREF(dvp); /* we want ourself, ie "." */ 1197 /* 1198 * When we lookup "." we still can be asked to lock it 1199 * differently. 1200 */ 1201 ltype = lkflags & LK_TYPE_MASK; 1202 if (ltype != VOP_ISLOCKED(dvp)) { 1203 if (ltype == LK_EXCLUSIVE) 1204 vn_lock(dvp, LK_UPGRADE | LK_RETRY); 1205 else /* if (ltype == LK_SHARED) */ 1206 vn_lock(dvp, LK_DOWNGRADE | LK_RETRY); 1207 } 1208 tdp = dvp; 1209 } else 1210 error = udf_vget(udfmp->im_mountp, id, lkflags, &tdp); 1211 if (!error) { 1212 *vpp = tdp; 1213 /* Put this entry in the cache */ 1214 if (flags & MAKEENTRY) 1215 cache_enter(dvp, *vpp, a->a_cnp); 1216 } 1217 } else { 1218 /* Name wasn't found on this pass. Do another pass? */ 1219 if (numdirpasses == 2) { 1220 numdirpasses--; 1221 offset = 0; 1222 udf_closedir(ds); 1223 goto lookloop; 1224 } 1225 udf_closedir(ds); 1226 1227 /* Enter name into cache as non-existant */ 1228 if (flags & MAKEENTRY) 1229 cache_enter(dvp, *vpp, a->a_cnp); 1230 1231 if ((flags & ISLASTCN) && 1232 (nameiop == CREATE || nameiop == RENAME)) { 1233 error = EROFS; 1234 } else { 1235 error = ENOENT; 1236 } 1237 } 1238 1239 return (error); 1240 } 1241 1242 static int 1243 udf_reclaim(struct vop_reclaim_args *a) 1244 { 1245 struct vnode *vp; 1246 struct udf_node *unode; 1247 1248 vp = a->a_vp; 1249 unode = VTON(vp); 1250 1251 /* 1252 * Destroy the vm object and flush associated pages. 1253 */ 1254 vnode_destroy_vobject(vp); 1255 1256 if (unode != NULL) { 1257 vfs_hash_remove(vp); 1258 1259 if (unode->fentry != NULL) 1260 free(unode->fentry, M_UDFFENTRY); 1261 uma_zfree(udf_zone_node, unode); 1262 vp->v_data = NULL; 1263 } 1264 1265 return (0); 1266 } 1267 1268 static int 1269 udf_vptofh(struct vop_vptofh_args *a) 1270 { 1271 struct udf_node *node; 1272 struct ifid *ifhp; 1273 1274 node = VTON(a->a_vp); 1275 ifhp = (struct ifid *)a->a_fhp; 1276 ifhp->ifid_len = sizeof(struct ifid); 1277 ifhp->ifid_ino = node->hash_id; 1278 1279 return (0); 1280 } 1281 1282 /* 1283 * Read the block and then set the data pointer to correspond with the 1284 * offset passed in. Only read in at most 'size' bytes, and then set 'size' 1285 * to the number of bytes pointed to. If 'size' is zero, try to read in a 1286 * whole extent. 1287 * 1288 * Note that *bp may be assigned error or not. 1289 * 1290 */ 1291 static int 1292 udf_readatoffset(struct udf_node *node, int *size, off_t offset, 1293 struct buf **bp, uint8_t **data) 1294 { 1295 struct udf_mnt *udfmp = node->udfmp; 1296 struct vnode *vp = node->i_vnode; 1297 struct file_entry *fentry; 1298 struct buf *bp1; 1299 uint32_t max_size; 1300 daddr_t sector; 1301 off_t off; 1302 int adj_size; 1303 int error; 1304 1305 /* 1306 * This call is made *not* only to detect UDF_INVALID_BMAP case, 1307 * max_size is used as an ad-hoc read-ahead hint for "normal" case. 1308 */ 1309 error = udf_bmap_internal(node, offset, §or, &max_size); 1310 if (error == UDF_INVALID_BMAP) { 1311 /* 1312 * This error means that the file *data* is stored in the 1313 * allocation descriptor field of the file entry. 1314 */ 1315 fentry = node->fentry; 1316 *data = &fentry->data[le32toh(fentry->l_ea)]; 1317 *size = le32toh(fentry->l_ad); 1318 if (offset >= *size) 1319 *size = 0; 1320 else { 1321 *data += offset; 1322 *size -= offset; 1323 } 1324 return (0); 1325 } else if (error != 0) { 1326 return (error); 1327 } 1328 1329 /* Adjust the size so that it is within range */ 1330 if (*size == 0 || *size > max_size) 1331 *size = max_size; 1332 1333 /* 1334 * Because we will read starting at block boundary, we need to adjust 1335 * how much we need to read so that all promised data is in. 1336 * Also, we can't promise to read more than MAXBSIZE bytes starting 1337 * from block boundary, so adjust what we promise too. 1338 */ 1339 off = blkoff(udfmp, offset); 1340 *size = min(*size, MAXBSIZE - off); 1341 adj_size = (*size + off + udfmp->bmask) & ~udfmp->bmask; 1342 *bp = NULL; 1343 if ((error = bread(vp, lblkno(udfmp, offset), adj_size, NOCRED, bp))) { 1344 printf("warning: udf_readlblks returned error %d\n", error); 1345 /* note: *bp may be non-NULL */ 1346 return (error); 1347 } 1348 1349 bp1 = *bp; 1350 *data = (uint8_t *)&bp1->b_data[offset & udfmp->bmask]; 1351 return (0); 1352 } 1353 1354 /* 1355 * Translate a file offset into a logical block and then into a physical 1356 * block. 1357 * max_size - maximum number of bytes that can be read starting from given 1358 * offset, rather than beginning of calculated sector number 1359 */ 1360 static int 1361 udf_bmap_internal(struct udf_node *node, off_t offset, daddr_t *sector, 1362 uint32_t *max_size) 1363 { 1364 struct udf_mnt *udfmp; 1365 struct file_entry *fentry; 1366 void *icb; 1367 struct icb_tag *tag; 1368 uint32_t icblen = 0; 1369 daddr_t lsector; 1370 int ad_offset, ad_num = 0; 1371 int i, p_offset; 1372 1373 udfmp = node->udfmp; 1374 fentry = node->fentry; 1375 tag = &fentry->icbtag; 1376 1377 switch (le16toh(tag->strat_type)) { 1378 case 4: 1379 break; 1380 1381 case 4096: 1382 printf("Cannot deal with strategy4096 yet!\n"); 1383 return (ENODEV); 1384 1385 default: 1386 printf("Unknown strategy type %d\n", tag->strat_type); 1387 return (ENODEV); 1388 } 1389 1390 switch (le16toh(tag->flags) & 0x7) { 1391 case 0: 1392 /* 1393 * The allocation descriptor field is filled with short_ad's. 1394 * If the offset is beyond the current extent, look for the 1395 * next extent. 1396 */ 1397 do { 1398 offset -= icblen; 1399 ad_offset = sizeof(struct short_ad) * ad_num; 1400 if (ad_offset > le32toh(fentry->l_ad)) { 1401 printf("File offset out of bounds\n"); 1402 return (EINVAL); 1403 } 1404 icb = GETICB(short_ad, fentry, 1405 le32toh(fentry->l_ea) + ad_offset); 1406 icblen = GETICBLEN(short_ad, icb); 1407 ad_num++; 1408 } while(offset >= icblen); 1409 1410 lsector = (offset >> udfmp->bshift) + 1411 le32toh(((struct short_ad *)(icb))->pos); 1412 1413 *max_size = icblen - offset; 1414 1415 break; 1416 case 1: 1417 /* 1418 * The allocation descriptor field is filled with long_ad's 1419 * If the offset is beyond the current extent, look for the 1420 * next extent. 1421 */ 1422 do { 1423 offset -= icblen; 1424 ad_offset = sizeof(struct long_ad) * ad_num; 1425 if (ad_offset > le32toh(fentry->l_ad)) { 1426 printf("File offset out of bounds\n"); 1427 return (EINVAL); 1428 } 1429 icb = GETICB(long_ad, fentry, 1430 le32toh(fentry->l_ea) + ad_offset); 1431 icblen = GETICBLEN(long_ad, icb); 1432 ad_num++; 1433 } while(offset >= icblen); 1434 1435 lsector = (offset >> udfmp->bshift) + 1436 le32toh(((struct long_ad *)(icb))->loc.lb_num); 1437 1438 *max_size = icblen - offset; 1439 1440 break; 1441 case 3: 1442 /* 1443 * This type means that the file *data* is stored in the 1444 * allocation descriptor field of the file entry. 1445 */ 1446 *max_size = 0; 1447 *sector = node->hash_id + udfmp->part_start; 1448 1449 return (UDF_INVALID_BMAP); 1450 case 2: 1451 /* DirectCD does not use extended_ad's */ 1452 default: 1453 printf("Unsupported allocation descriptor %d\n", 1454 tag->flags & 0x7); 1455 return (ENODEV); 1456 } 1457 1458 *sector = lsector + udfmp->part_start; 1459 1460 /* 1461 * Check the sparing table. Each entry represents the beginning of 1462 * a packet. 1463 */ 1464 if (udfmp->s_table != NULL) { 1465 for (i = 0; i< udfmp->s_table_entries; i++) { 1466 p_offset = 1467 lsector - le32toh(udfmp->s_table->entries[i].org); 1468 if ((p_offset < udfmp->p_sectors) && (p_offset >= 0)) { 1469 *sector = 1470 le32toh(udfmp->s_table->entries[i].map) + 1471 p_offset; 1472 break; 1473 } 1474 } 1475 } 1476 1477 return (0); 1478 }
Cache object: e023a5eb60e43ae379645c233884df83
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