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FreeBSD/Linux Kernel Cross Reference
sys/fs/udf/udf_vnops.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: releng/12.0/sys/fs/udf/udf_vnops.c 341085 2018-11-27 17:58:25Z markj $ 29 */ 30 31 /* udf_vnops.c */ 32 /* Take care of the vnode side of things */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/namei.h> 37 #include <sys/kernel.h> 38 #include <sys/malloc.h> 39 #include <sys/stat.h> 40 #include <sys/bio.h> 41 #include <sys/conf.h> 42 #include <sys/buf.h> 43 #include <sys/iconv.h> 44 #include <sys/mount.h> 45 #include <sys/vnode.h> 46 #include <sys/dirent.h> 47 #include <sys/queue.h> 48 #include <sys/unistd.h> 49 #include <sys/endian.h> 50 51 #include <vm/uma.h> 52 53 #include <fs/udf/ecma167-udf.h> 54 #include <fs/udf/osta.h> 55 #include <fs/udf/udf.h> 56 #include <fs/udf/udf_mount.h> 57 58 extern struct iconv_functions *udf_iconv; 59 60 static vop_access_t udf_access; 61 static vop_getattr_t udf_getattr; 62 static vop_open_t udf_open; 63 static vop_ioctl_t udf_ioctl; 64 static vop_pathconf_t udf_pathconf; 65 static vop_print_t udf_print; 66 static vop_read_t udf_read; 67 static vop_readdir_t udf_readdir; 68 static vop_readlink_t udf_readlink; 69 static vop_setattr_t udf_setattr; 70 static vop_strategy_t udf_strategy; 71 static vop_bmap_t udf_bmap; 72 static vop_cachedlookup_t udf_lookup; 73 static vop_reclaim_t udf_reclaim; 74 static vop_vptofh_t udf_vptofh; 75 static int udf_readatoffset(struct udf_node *node, int *size, off_t offset, 76 struct buf **bp, uint8_t **data); 77 static int udf_bmap_internal(struct udf_node *node, off_t offset, 78 daddr_t *sector, uint32_t *max_size); 79 80 static struct vop_vector udf_vnodeops = { 81 .vop_default = &default_vnodeops, 82 83 .vop_access = udf_access, 84 .vop_bmap = udf_bmap, 85 .vop_cachedlookup = udf_lookup, 86 .vop_getattr = udf_getattr, 87 .vop_ioctl = udf_ioctl, 88 .vop_lookup = vfs_cache_lookup, 89 .vop_open = udf_open, 90 .vop_pathconf = udf_pathconf, 91 .vop_print = udf_print, 92 .vop_read = udf_read, 93 .vop_readdir = udf_readdir, 94 .vop_readlink = udf_readlink, 95 .vop_reclaim = udf_reclaim, 96 .vop_setattr = udf_setattr, 97 .vop_strategy = udf_strategy, 98 .vop_vptofh = udf_vptofh, 99 }; 100 101 struct vop_vector udf_fifoops = { 102 .vop_default = &fifo_specops, 103 .vop_access = udf_access, 104 .vop_getattr = udf_getattr, 105 .vop_pathconf = udf_pathconf, 106 .vop_print = udf_print, 107 .vop_reclaim = udf_reclaim, 108 .vop_setattr = udf_setattr, 109 .vop_vptofh = udf_vptofh, 110 }; 111 112 static MALLOC_DEFINE(M_UDFFID, "udf_fid", "UDF FileId structure"); 113 static MALLOC_DEFINE(M_UDFDS, "udf_ds", "UDF Dirstream structure"); 114 115 #define UDF_INVALID_BMAP -1 116 117 int 118 udf_allocv(struct mount *mp, struct vnode **vpp, struct thread *td) 119 { 120 int error; 121 struct vnode *vp; 122 123 error = getnewvnode("udf", mp, &udf_vnodeops, &vp); 124 if (error) { 125 printf("udf_allocv: failed to allocate new vnode\n"); 126 return (error); 127 } 128 129 *vpp = vp; 130 return (0); 131 } 132 133 /* Convert file entry permission (5 bits per owner/group/user) to a mode_t */ 134 static mode_t 135 udf_permtomode(struct udf_node *node) 136 { 137 uint32_t perm; 138 uint16_t flags; 139 mode_t mode; 140 141 perm = le32toh(node->fentry->perm); 142 flags = le16toh(node->fentry->icbtag.flags); 143 144 mode = perm & UDF_FENTRY_PERM_USER_MASK; 145 mode |= ((perm & UDF_FENTRY_PERM_GRP_MASK) >> 2); 146 mode |= ((perm & UDF_FENTRY_PERM_OWNER_MASK) >> 4); 147 mode |= ((flags & UDF_ICB_TAG_FLAGS_STICKY) << 4); 148 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETGID) << 6); 149 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETUID) << 8); 150 151 return (mode); 152 } 153 154 static int 155 udf_access(struct vop_access_args *a) 156 { 157 struct vnode *vp; 158 struct udf_node *node; 159 accmode_t accmode; 160 mode_t mode; 161 162 vp = a->a_vp; 163 node = VTON(vp); 164 accmode = a->a_accmode; 165 166 if (accmode & VWRITE) { 167 switch (vp->v_type) { 168 case VDIR: 169 case VLNK: 170 case VREG: 171 return (EROFS); 172 /* NOT REACHED */ 173 default: 174 break; 175 } 176 } 177 178 mode = udf_permtomode(node); 179 180 return (vaccess(vp->v_type, mode, node->fentry->uid, node->fentry->gid, 181 accmode, a->a_cred, NULL)); 182 } 183 184 static int 185 udf_open(struct vop_open_args *ap) { 186 struct udf_node *np = VTON(ap->a_vp); 187 off_t fsize; 188 189 fsize = le64toh(np->fentry->inf_len); 190 vnode_create_vobject(ap->a_vp, fsize, ap->a_td); 191 return 0; 192 } 193 194 static const int mon_lens[2][12] = { 195 {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334}, 196 {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335} 197 }; 198 199 static int 200 udf_isaleapyear(int year) 201 { 202 int i; 203 204 i = (year % 4) ? 0 : 1; 205 i &= (year % 100) ? 1 : 0; 206 i |= (year % 400) ? 0 : 1; 207 208 return i; 209 } 210 211 /* 212 * Timezone calculation compliments of Julian Elischer <julian@elischer.org>. 213 */ 214 static void 215 udf_timetotimespec(struct timestamp *time, struct timespec *t) 216 { 217 int i, lpyear, daysinyear, year, startyear; 218 union { 219 uint16_t u_tz_offset; 220 int16_t s_tz_offset; 221 } tz; 222 223 /* 224 * DirectCD seems to like using bogus year values. 225 * Don't trust time->month as it will be used for an array index. 226 */ 227 year = le16toh(time->year); 228 if (year < 1970 || time->month < 1 || time->month > 12) { 229 t->tv_sec = 0; 230 t->tv_nsec = 0; 231 return; 232 } 233 234 /* Calculate the time and day */ 235 t->tv_sec = time->second; 236 t->tv_sec += time->minute * 60; 237 t->tv_sec += time->hour * 3600; 238 t->tv_sec += (time->day - 1) * 3600 * 24; 239 240 /* Calculate the month */ 241 lpyear = udf_isaleapyear(year); 242 t->tv_sec += mon_lens[lpyear][time->month - 1] * 3600 * 24; 243 244 /* Speed up the calculation */ 245 startyear = 1970; 246 if (year > 2009) { 247 t->tv_sec += 1262304000; 248 startyear += 40; 249 } else if (year > 1999) { 250 t->tv_sec += 946684800; 251 startyear += 30; 252 } else if (year > 1989) { 253 t->tv_sec += 631152000; 254 startyear += 20; 255 } else if (year > 1979) { 256 t->tv_sec += 315532800; 257 startyear += 10; 258 } 259 260 daysinyear = (year - startyear) * 365; 261 for (i = startyear; i < year; i++) 262 daysinyear += udf_isaleapyear(i); 263 t->tv_sec += daysinyear * 3600 * 24; 264 265 /* Calculate microseconds */ 266 t->tv_nsec = time->centisec * 10000 + time->hund_usec * 100 + 267 time->usec; 268 269 /* 270 * Calculate the time zone. The timezone is 12 bit signed 2's 271 * complement, so we gotta do some extra magic to handle it right. 272 */ 273 tz.u_tz_offset = le16toh(time->type_tz); 274 tz.u_tz_offset &= 0x0fff; 275 if (tz.u_tz_offset & 0x0800) 276 tz.u_tz_offset |= 0xf000; /* extend the sign to 16 bits */ 277 if ((le16toh(time->type_tz) & 0x1000) && (tz.s_tz_offset != -2047)) 278 t->tv_sec -= tz.s_tz_offset * 60; 279 280 return; 281 } 282 283 static int 284 udf_getattr(struct vop_getattr_args *a) 285 { 286 struct vnode *vp; 287 struct udf_node *node; 288 struct vattr *vap; 289 struct file_entry *fentry; 290 struct timespec ts; 291 292 ts.tv_sec = 0; 293 294 vp = a->a_vp; 295 vap = a->a_vap; 296 node = VTON(vp); 297 fentry = node->fentry; 298 299 vap->va_fsid = dev2udev(node->udfmp->im_dev); 300 vap->va_fileid = node->hash_id; 301 vap->va_mode = udf_permtomode(node); 302 vap->va_nlink = le16toh(fentry->link_cnt); 303 /* 304 * XXX The spec says that -1 is valid for uid/gid and indicates an 305 * invalid uid/gid. How should this be represented? 306 */ 307 vap->va_uid = (le32toh(fentry->uid) == -1) ? 0 : le32toh(fentry->uid); 308 vap->va_gid = (le32toh(fentry->gid) == -1) ? 0 : le32toh(fentry->gid); 309 udf_timetotimespec(&fentry->atime, &vap->va_atime); 310 udf_timetotimespec(&fentry->mtime, &vap->va_mtime); 311 vap->va_ctime = vap->va_mtime; /* XXX Stored as an Extended Attribute */ 312 vap->va_rdev = NODEV; 313 if (vp->v_type & VDIR) { 314 /* 315 * Directories that are recorded within their ICB will show 316 * as having 0 blocks recorded. Since tradition dictates 317 * that directories consume at least one logical block, 318 * make it appear so. 319 */ 320 if (fentry->logblks_rec != 0) { 321 vap->va_size = 322 le64toh(fentry->logblks_rec) * node->udfmp->bsize; 323 } else { 324 vap->va_size = node->udfmp->bsize; 325 } 326 } else { 327 vap->va_size = le64toh(fentry->inf_len); 328 } 329 vap->va_flags = 0; 330 vap->va_gen = 1; 331 vap->va_blocksize = node->udfmp->bsize; 332 vap->va_bytes = le64toh(fentry->inf_len); 333 vap->va_type = vp->v_type; 334 vap->va_filerev = 0; /* XXX */ 335 return (0); 336 } 337 338 static int 339 udf_setattr(struct vop_setattr_args *a) 340 { 341 struct vnode *vp; 342 struct vattr *vap; 343 344 vp = a->a_vp; 345 vap = a->a_vap; 346 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 347 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 348 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 349 return (EROFS); 350 if (vap->va_size != (u_quad_t)VNOVAL) { 351 switch (vp->v_type) { 352 case VDIR: 353 return (EISDIR); 354 case VLNK: 355 case VREG: 356 return (EROFS); 357 case VCHR: 358 case VBLK: 359 case VSOCK: 360 case VFIFO: 361 case VNON: 362 case VBAD: 363 case VMARKER: 364 return (0); 365 } 366 } 367 return (0); 368 } 369 370 /* 371 * File specific ioctls. 372 */ 373 static int 374 udf_ioctl(struct vop_ioctl_args *a) 375 { 376 printf("%s called\n", __func__); 377 return (ENOTTY); 378 } 379 380 /* 381 * I'm not sure that this has much value in a read-only filesystem, but 382 * cd9660 has it too. 383 */ 384 static int 385 udf_pathconf(struct vop_pathconf_args *a) 386 { 387 388 switch (a->a_name) { 389 case _PC_FILESIZEBITS: 390 *a->a_retval = 64; 391 return (0); 392 case _PC_LINK_MAX: 393 *a->a_retval = 65535; 394 return (0); 395 case _PC_NAME_MAX: 396 *a->a_retval = NAME_MAX; 397 return (0); 398 case _PC_SYMLINK_MAX: 399 *a->a_retval = MAXPATHLEN; 400 return (0); 401 case _PC_NO_TRUNC: 402 *a->a_retval = 1; 403 return (0); 404 case _PC_PIPE_BUF: 405 if (a->a_vp->v_type == VDIR || a->a_vp->v_type == VFIFO) { 406 *a->a_retval = PIPE_BUF; 407 return (0); 408 } 409 return (EINVAL); 410 default: 411 return (vop_stdpathconf(a)); 412 } 413 } 414 415 static int 416 udf_print(struct vop_print_args *ap) 417 { 418 struct vnode *vp = ap->a_vp; 419 struct udf_node *node = VTON(vp); 420 421 printf(" ino %lu, on dev %s", (u_long)node->hash_id, 422 devtoname(node->udfmp->im_dev)); 423 if (vp->v_type == VFIFO) 424 fifo_printinfo(vp); 425 printf("\n"); 426 return (0); 427 } 428 429 #define lblkno(udfmp, loc) ((loc) >> (udfmp)->bshift) 430 #define blkoff(udfmp, loc) ((loc) & (udfmp)->bmask) 431 #define lblktosize(udfmp, blk) ((blk) << (udfmp)->bshift) 432 433 static inline int 434 is_data_in_fentry(const struct udf_node *node) 435 { 436 const struct file_entry *fentry = node->fentry; 437 438 return ((le16toh(fentry->icbtag.flags) & 0x7) == 3); 439 } 440 441 static int 442 udf_read(struct vop_read_args *ap) 443 { 444 struct vnode *vp = ap->a_vp; 445 struct uio *uio = ap->a_uio; 446 struct udf_node *node = VTON(vp); 447 struct udf_mnt *udfmp; 448 struct file_entry *fentry; 449 struct buf *bp; 450 uint8_t *data; 451 daddr_t lbn, rablock; 452 off_t diff, fsize; 453 ssize_t n; 454 int error = 0; 455 long size, on; 456 457 if (uio->uio_resid == 0) 458 return (0); 459 if (uio->uio_offset < 0) 460 return (EINVAL); 461 462 if (is_data_in_fentry(node)) { 463 fentry = node->fentry; 464 data = &fentry->data[le32toh(fentry->l_ea)]; 465 fsize = le32toh(fentry->l_ad); 466 467 n = uio->uio_resid; 468 diff = fsize - uio->uio_offset; 469 if (diff <= 0) 470 return (0); 471 if (diff < n) 472 n = diff; 473 error = uiomove(data + uio->uio_offset, (int)n, uio); 474 return (error); 475 } 476 477 fsize = le64toh(node->fentry->inf_len); 478 udfmp = node->udfmp; 479 do { 480 lbn = lblkno(udfmp, uio->uio_offset); 481 on = blkoff(udfmp, uio->uio_offset); 482 n = min((u_int)(udfmp->bsize - on), 483 uio->uio_resid); 484 diff = fsize - uio->uio_offset; 485 if (diff <= 0) 486 return (0); 487 if (diff < n) 488 n = diff; 489 size = udfmp->bsize; 490 rablock = lbn + 1; 491 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 492 if (lblktosize(udfmp, rablock) < fsize) { 493 error = cluster_read(vp, fsize, lbn, size, 494 NOCRED, uio->uio_resid, 495 (ap->a_ioflag >> 16), 0, &bp); 496 } else { 497 error = bread(vp, lbn, size, NOCRED, &bp); 498 } 499 } else { 500 error = bread(vp, lbn, size, NOCRED, &bp); 501 } 502 if (error != 0) { 503 brelse(bp); 504 return (error); 505 } 506 n = min(n, size - bp->b_resid); 507 508 error = uiomove(bp->b_data + on, (int)n, uio); 509 brelse(bp); 510 } while (error == 0 && uio->uio_resid > 0 && n != 0); 511 return (error); 512 } 513 514 /* 515 * Call the OSTA routines to translate the name from a CS0 dstring to a 516 * 16-bit Unicode String. Hooks need to be placed in here to translate from 517 * Unicode to the encoding that the kernel/user expects. Return the length 518 * of the translated string. 519 */ 520 static int 521 udf_transname(char *cs0string, char *destname, int len, struct udf_mnt *udfmp) 522 { 523 unicode_t *transname; 524 char *unibuf, *unip; 525 int i, destlen; 526 ssize_t unilen = 0; 527 size_t destleft = MAXNAMLEN; 528 529 /* Convert 16-bit Unicode to destname */ 530 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 531 /* allocate a buffer big enough to hold an 8->16 bit expansion */ 532 unibuf = uma_zalloc(udf_zone_trans, M_WAITOK); 533 unip = unibuf; 534 if ((unilen = (ssize_t)udf_UncompressUnicodeByte(len, cs0string, unibuf)) == -1) { 535 printf("udf: Unicode translation failed\n"); 536 uma_zfree(udf_zone_trans, unibuf); 537 return 0; 538 } 539 540 while (unilen > 0 && destleft > 0) { 541 udf_iconv->conv(udfmp->im_d2l, __DECONST(const char **, 542 &unibuf), (size_t *)&unilen, (char **)&destname, 543 &destleft); 544 /* Unconverted character found */ 545 if (unilen > 0 && destleft > 0) { 546 *destname++ = '?'; 547 destleft--; 548 unibuf += 2; 549 unilen -= 2; 550 } 551 } 552 uma_zfree(udf_zone_trans, unip); 553 *destname = '\0'; 554 destlen = MAXNAMLEN - (int)destleft; 555 } else { 556 /* allocate a buffer big enough to hold an 8->16 bit expansion */ 557 transname = uma_zalloc(udf_zone_trans, M_WAITOK); 558 559 if ((unilen = (ssize_t)udf_UncompressUnicode(len, cs0string, transname)) == -1) { 560 printf("udf: Unicode translation failed\n"); 561 uma_zfree(udf_zone_trans, transname); 562 return 0; 563 } 564 565 for (i = 0; i < unilen ; i++) { 566 if (transname[i] & 0xff00) { 567 destname[i] = '.'; /* Fudge the 16bit chars */ 568 } else { 569 destname[i] = transname[i] & 0xff; 570 } 571 } 572 uma_zfree(udf_zone_trans, transname); 573 destname[unilen] = 0; 574 destlen = (int)unilen; 575 } 576 577 return (destlen); 578 } 579 580 /* 581 * Compare a CS0 dstring with a name passed in from the VFS layer. Return 582 * 0 on a successful match, nonzero otherwise. Unicode work may need to be done 583 * here also. 584 */ 585 static int 586 udf_cmpname(char *cs0string, char *cmpname, int cs0len, int cmplen, struct udf_mnt *udfmp) 587 { 588 char *transname; 589 int error = 0; 590 591 /* This is overkill, but not worth creating a new zone */ 592 transname = uma_zalloc(udf_zone_trans, M_WAITOK); 593 594 cs0len = udf_transname(cs0string, transname, cs0len, udfmp); 595 596 /* Easy check. If they aren't the same length, they aren't equal */ 597 if ((cs0len == 0) || (cs0len != cmplen)) 598 error = -1; 599 else 600 error = bcmp(transname, cmpname, cmplen); 601 602 uma_zfree(udf_zone_trans, transname); 603 return (error); 604 } 605 606 struct udf_uiodir { 607 struct dirent *dirent; 608 u_long *cookies; 609 int ncookies; 610 int acookies; 611 int eofflag; 612 }; 613 614 static int 615 udf_uiodir(struct udf_uiodir *uiodir, int de_size, struct uio *uio, long cookie) 616 { 617 if (uiodir->cookies != NULL) { 618 if (++uiodir->acookies > uiodir->ncookies) { 619 uiodir->eofflag = 0; 620 return (-1); 621 } 622 *uiodir->cookies++ = cookie; 623 } 624 625 if (uio->uio_resid < de_size) { 626 uiodir->eofflag = 0; 627 return (-1); 628 } 629 630 return (uiomove(uiodir->dirent, de_size, uio)); 631 } 632 633 static struct udf_dirstream * 634 udf_opendir(struct udf_node *node, int offset, int fsize, struct udf_mnt *udfmp) 635 { 636 struct udf_dirstream *ds; 637 638 ds = uma_zalloc(udf_zone_ds, M_WAITOK | M_ZERO); 639 640 ds->node = node; 641 ds->offset = offset; 642 ds->udfmp = udfmp; 643 ds->fsize = fsize; 644 645 return (ds); 646 } 647 648 static struct fileid_desc * 649 udf_getfid(struct udf_dirstream *ds) 650 { 651 struct fileid_desc *fid; 652 int error, frag_size = 0, total_fid_size; 653 654 /* End of directory? */ 655 if (ds->offset + ds->off >= ds->fsize) { 656 ds->error = 0; 657 return (NULL); 658 } 659 660 /* Grab the first extent of the directory */ 661 if (ds->off == 0) { 662 ds->size = 0; 663 error = udf_readatoffset(ds->node, &ds->size, ds->offset, 664 &ds->bp, &ds->data); 665 if (error) { 666 ds->error = error; 667 if (ds->bp != NULL) 668 brelse(ds->bp); 669 return (NULL); 670 } 671 } 672 673 /* 674 * Clean up from a previous fragmented FID. 675 * XXX Is this the right place for this? 676 */ 677 if (ds->fid_fragment && ds->buf != NULL) { 678 ds->fid_fragment = 0; 679 free(ds->buf, M_UDFFID); 680 } 681 682 fid = (struct fileid_desc*)&ds->data[ds->off]; 683 684 /* 685 * Check to see if the fid is fragmented. The first test 686 * ensures that we don't wander off the end of the buffer 687 * looking for the l_iu and l_fi fields. 688 */ 689 if (ds->off + UDF_FID_SIZE > ds->size || 690 ds->off + le16toh(fid->l_iu) + fid->l_fi + UDF_FID_SIZE > ds->size){ 691 692 /* Copy what we have of the fid into a buffer */ 693 frag_size = ds->size - ds->off; 694 if (frag_size >= ds->udfmp->bsize) { 695 printf("udf: invalid FID fragment\n"); 696 ds->error = EINVAL; 697 return (NULL); 698 } 699 700 /* 701 * File ID descriptors can only be at most one 702 * logical sector in size. 703 */ 704 ds->buf = malloc(ds->udfmp->bsize, M_UDFFID, 705 M_WAITOK | M_ZERO); 706 bcopy(fid, ds->buf, frag_size); 707 708 /* Reduce all of the casting magic */ 709 fid = (struct fileid_desc*)ds->buf; 710 711 if (ds->bp != NULL) 712 brelse(ds->bp); 713 714 /* Fetch the next allocation */ 715 ds->offset += ds->size; 716 ds->size = 0; 717 error = udf_readatoffset(ds->node, &ds->size, ds->offset, 718 &ds->bp, &ds->data); 719 if (error) { 720 ds->error = error; 721 return (NULL); 722 } 723 724 /* 725 * If the fragment was so small that we didn't get 726 * the l_iu and l_fi fields, copy those in. 727 */ 728 if (frag_size < UDF_FID_SIZE) 729 bcopy(ds->data, &ds->buf[frag_size], 730 UDF_FID_SIZE - frag_size); 731 732 /* 733 * Now that we have enough of the fid to work with, 734 * copy in the rest of the fid from the new 735 * allocation. 736 */ 737 total_fid_size = UDF_FID_SIZE + le16toh(fid->l_iu) + fid->l_fi; 738 if (total_fid_size > ds->udfmp->bsize) { 739 printf("udf: invalid FID\n"); 740 ds->error = EIO; 741 return (NULL); 742 } 743 bcopy(ds->data, &ds->buf[frag_size], 744 total_fid_size - frag_size); 745 746 ds->fid_fragment = 1; 747 } else { 748 total_fid_size = le16toh(fid->l_iu) + fid->l_fi + UDF_FID_SIZE; 749 } 750 751 /* 752 * Update the offset. Align on a 4 byte boundary because the 753 * UDF spec says so. 754 */ 755 ds->this_off = ds->offset + ds->off; 756 if (!ds->fid_fragment) { 757 ds->off += (total_fid_size + 3) & ~0x03; 758 } else { 759 ds->off = (total_fid_size - frag_size + 3) & ~0x03; 760 } 761 762 return (fid); 763 } 764 765 static void 766 udf_closedir(struct udf_dirstream *ds) 767 { 768 769 if (ds->bp != NULL) 770 brelse(ds->bp); 771 772 if (ds->fid_fragment && ds->buf != NULL) 773 free(ds->buf, M_UDFFID); 774 775 uma_zfree(udf_zone_ds, ds); 776 } 777 778 static int 779 udf_readdir(struct vop_readdir_args *a) 780 { 781 struct vnode *vp; 782 struct uio *uio; 783 struct dirent dir; 784 struct udf_node *node; 785 struct udf_mnt *udfmp; 786 struct fileid_desc *fid; 787 struct udf_uiodir uiodir; 788 struct udf_dirstream *ds; 789 u_long *cookies = NULL; 790 int ncookies; 791 int error = 0; 792 793 vp = a->a_vp; 794 uio = a->a_uio; 795 node = VTON(vp); 796 udfmp = node->udfmp; 797 uiodir.eofflag = 1; 798 799 if (a->a_ncookies != NULL) { 800 /* 801 * Guess how many entries are needed. If we run out, this 802 * function will be called again and thing will pick up were 803 * it left off. 804 */ 805 ncookies = uio->uio_resid / 8; 806 cookies = malloc(sizeof(u_long) * ncookies, 807 M_TEMP, M_WAITOK); 808 if (cookies == NULL) 809 return (ENOMEM); 810 uiodir.ncookies = ncookies; 811 uiodir.cookies = cookies; 812 uiodir.acookies = 0; 813 } else { 814 uiodir.cookies = NULL; 815 } 816 817 /* 818 * Iterate through the file id descriptors. Give the parent dir 819 * entry special attention. 820 */ 821 ds = udf_opendir(node, uio->uio_offset, le64toh(node->fentry->inf_len), 822 node->udfmp); 823 824 while ((fid = udf_getfid(ds)) != NULL) { 825 826 /* XXX Should we return an error on a bad fid? */ 827 if (udf_checktag(&fid->tag, TAGID_FID)) { 828 printf("Invalid FID tag\n"); 829 hexdump(fid, UDF_FID_SIZE, NULL, 0); 830 error = EIO; 831 break; 832 } 833 834 /* Is this a deleted file? */ 835 if (fid->file_char & UDF_FILE_CHAR_DEL) 836 continue; 837 838 if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) { 839 /* Do up the '.' and '..' entries. Dummy values are 840 * used for the cookies since the offset here is 841 * usually zero, and NFS doesn't like that value 842 */ 843 dir.d_fileno = node->hash_id; 844 dir.d_type = DT_DIR; 845 dir.d_name[0] = '.'; 846 dir.d_namlen = 1; 847 dir.d_reclen = GENERIC_DIRSIZ(&dir); 848 dirent_terminate(&dir); 849 uiodir.dirent = &dir; 850 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 1); 851 if (error) 852 break; 853 854 dir.d_fileno = udf_getid(&fid->icb); 855 dir.d_type = DT_DIR; 856 dir.d_name[0] = '.'; 857 dir.d_name[1] = '.'; 858 dir.d_namlen = 2; 859 dir.d_reclen = GENERIC_DIRSIZ(&dir); 860 dirent_terminate(&dir); 861 uiodir.dirent = &dir; 862 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 2); 863 } else { 864 dir.d_namlen = udf_transname(&fid->data[fid->l_iu], 865 &dir.d_name[0], fid->l_fi, udfmp); 866 dir.d_fileno = udf_getid(&fid->icb); 867 dir.d_type = (fid->file_char & UDF_FILE_CHAR_DIR) ? 868 DT_DIR : DT_UNKNOWN; 869 dir.d_reclen = GENERIC_DIRSIZ(&dir); 870 dirent_terminate(&dir); 871 uiodir.dirent = &dir; 872 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 873 ds->this_off); 874 } 875 if (error) 876 break; 877 uio->uio_offset = ds->offset + ds->off; 878 } 879 880 /* tell the calling layer whether we need to be called again */ 881 *a->a_eofflag = uiodir.eofflag; 882 883 if (error < 0) 884 error = 0; 885 if (!error) 886 error = ds->error; 887 888 udf_closedir(ds); 889 890 if (a->a_ncookies != NULL) { 891 if (error) 892 free(cookies, M_TEMP); 893 else { 894 *a->a_ncookies = uiodir.acookies; 895 *a->a_cookies = cookies; 896 } 897 } 898 899 return (error); 900 } 901 902 static int 903 udf_readlink(struct vop_readlink_args *ap) 904 { 905 struct path_component *pc, *end; 906 struct vnode *vp; 907 struct uio uio; 908 struct iovec iov[1]; 909 struct udf_node *node; 910 void *buf; 911 char *cp; 912 int error, len, root; 913 914 /* 915 * A symbolic link in UDF is a list of variable-length path 916 * component structures. We build a pathname in the caller's 917 * uio by traversing this list. 918 */ 919 vp = ap->a_vp; 920 node = VTON(vp); 921 len = le64toh(node->fentry->inf_len); 922 buf = malloc(len, M_DEVBUF, M_WAITOK); 923 iov[0].iov_len = len; 924 iov[0].iov_base = buf; 925 uio.uio_iov = iov; 926 uio.uio_iovcnt = 1; 927 uio.uio_offset = 0; 928 uio.uio_resid = iov[0].iov_len; 929 uio.uio_segflg = UIO_SYSSPACE; 930 uio.uio_rw = UIO_READ; 931 uio.uio_td = curthread; 932 error = VOP_READ(vp, &uio, 0, ap->a_cred); 933 if (error) 934 goto error; 935 936 pc = buf; 937 end = (void *)((char *)buf + len); 938 root = 0; 939 while (pc < end) { 940 switch (pc->type) { 941 case UDF_PATH_ROOT: 942 /* Only allow this at the beginning of a path. */ 943 if ((void *)pc != buf) { 944 error = EINVAL; 945 goto error; 946 } 947 cp = "/"; 948 len = 1; 949 root = 1; 950 break; 951 case UDF_PATH_DOT: 952 cp = "."; 953 len = 1; 954 break; 955 case UDF_PATH_DOTDOT: 956 cp = ".."; 957 len = 2; 958 break; 959 case UDF_PATH_PATH: 960 if (pc->length == 0) { 961 error = EINVAL; 962 goto error; 963 } 964 /* 965 * XXX: We only support CS8 which appears to map 966 * to ASCII directly. 967 */ 968 switch (pc->identifier[0]) { 969 case 8: 970 cp = pc->identifier + 1; 971 len = pc->length - 1; 972 break; 973 default: 974 error = EOPNOTSUPP; 975 goto error; 976 } 977 break; 978 default: 979 error = EINVAL; 980 goto error; 981 } 982 983 /* 984 * If this is not the first component, insert a path 985 * separator. 986 */ 987 if (pc != buf) { 988 /* If we started with root we already have a "/". */ 989 if (root) 990 goto skipslash; 991 root = 0; 992 if (ap->a_uio->uio_resid < 1) { 993 error = ENAMETOOLONG; 994 goto error; 995 } 996 error = uiomove("/", 1, ap->a_uio); 997 if (error) 998 break; 999 } 1000 skipslash: 1001 1002 /* Append string at 'cp' of length 'len' to our path. */ 1003 if (len > ap->a_uio->uio_resid) { 1004 error = ENAMETOOLONG; 1005 goto error; 1006 } 1007 error = uiomove(cp, len, ap->a_uio); 1008 if (error) 1009 break; 1010 1011 /* Advance to next component. */ 1012 pc = (void *)((char *)pc + 4 + pc->length); 1013 } 1014 error: 1015 free(buf, M_DEVBUF); 1016 return (error); 1017 } 1018 1019 static int 1020 udf_strategy(struct vop_strategy_args *a) 1021 { 1022 struct buf *bp; 1023 struct vnode *vp; 1024 struct udf_node *node; 1025 struct bufobj *bo; 1026 off_t offset; 1027 uint32_t maxsize; 1028 daddr_t sector; 1029 int error; 1030 1031 bp = a->a_bp; 1032 vp = a->a_vp; 1033 node = VTON(vp); 1034 1035 if (bp->b_blkno == bp->b_lblkno) { 1036 offset = lblktosize(node->udfmp, bp->b_lblkno); 1037 error = udf_bmap_internal(node, offset, §or, &maxsize); 1038 if (error) { 1039 clrbuf(bp); 1040 bp->b_blkno = -1; 1041 bufdone(bp); 1042 return (0); 1043 } 1044 /* bmap gives sector numbers, bio works with device blocks */ 1045 bp->b_blkno = sector << (node->udfmp->bshift - DEV_BSHIFT); 1046 } 1047 bo = node->udfmp->im_bo; 1048 bp->b_iooffset = dbtob(bp->b_blkno); 1049 BO_STRATEGY(bo, bp); 1050 return (0); 1051 } 1052 1053 static int 1054 udf_bmap(struct vop_bmap_args *a) 1055 { 1056 struct udf_node *node; 1057 uint32_t max_size; 1058 daddr_t lsector; 1059 int nblk; 1060 int error; 1061 1062 node = VTON(a->a_vp); 1063 1064 if (a->a_bop != NULL) 1065 *a->a_bop = &node->udfmp->im_devvp->v_bufobj; 1066 if (a->a_bnp == NULL) 1067 return (0); 1068 if (a->a_runb) 1069 *a->a_runb = 0; 1070 1071 /* 1072 * UDF_INVALID_BMAP means data embedded into fentry, this is an internal 1073 * error that should not be propagated to calling code. 1074 * Most obvious mapping for this error is EOPNOTSUPP as we can not truly 1075 * translate block numbers in this case. 1076 * Incidentally, this return code will make vnode pager to use VOP_READ 1077 * to get data for mmap-ed pages and udf_read knows how to do the right 1078 * thing for this kind of files. 1079 */ 1080 error = udf_bmap_internal(node, a->a_bn << node->udfmp->bshift, 1081 &lsector, &max_size); 1082 if (error == UDF_INVALID_BMAP) 1083 return (EOPNOTSUPP); 1084 if (error) 1085 return (error); 1086 1087 /* Translate logical to physical sector number */ 1088 *a->a_bnp = lsector << (node->udfmp->bshift - DEV_BSHIFT); 1089 1090 /* 1091 * Determine maximum number of readahead blocks following the 1092 * requested block. 1093 */ 1094 if (a->a_runp) { 1095 nblk = (max_size >> node->udfmp->bshift) - 1; 1096 if (nblk <= 0) 1097 *a->a_runp = 0; 1098 else if (nblk >= (MAXBSIZE >> node->udfmp->bshift)) 1099 *a->a_runp = (MAXBSIZE >> node->udfmp->bshift) - 1; 1100 else 1101 *a->a_runp = nblk; 1102 } 1103 1104 if (a->a_runb) { 1105 *a->a_runb = 0; 1106 } 1107 1108 return (0); 1109 } 1110 1111 /* 1112 * The all powerful VOP_LOOKUP(). 1113 */ 1114 static int 1115 udf_lookup(struct vop_cachedlookup_args *a) 1116 { 1117 struct vnode *dvp; 1118 struct vnode *tdp = NULL; 1119 struct vnode **vpp = a->a_vpp; 1120 struct udf_node *node; 1121 struct udf_mnt *udfmp; 1122 struct fileid_desc *fid = NULL; 1123 struct udf_dirstream *ds; 1124 u_long nameiop; 1125 u_long flags; 1126 char *nameptr; 1127 long namelen; 1128 ino_t id = 0; 1129 int offset, error = 0; 1130 int fsize, lkflags, ltype, numdirpasses; 1131 1132 dvp = a->a_dvp; 1133 node = VTON(dvp); 1134 udfmp = node->udfmp; 1135 nameiop = a->a_cnp->cn_nameiop; 1136 flags = a->a_cnp->cn_flags; 1137 lkflags = a->a_cnp->cn_lkflags; 1138 nameptr = a->a_cnp->cn_nameptr; 1139 namelen = a->a_cnp->cn_namelen; 1140 fsize = le64toh(node->fentry->inf_len); 1141 1142 /* 1143 * If this is a LOOKUP and we've already partially searched through 1144 * the directory, pick up where we left off and flag that the 1145 * directory may need to be searched twice. For a full description, 1146 * see /sys/fs/cd9660/cd9660_lookup.c:cd9660_lookup() 1147 */ 1148 if (nameiop != LOOKUP || node->diroff == 0 || node->diroff > fsize) { 1149 offset = 0; 1150 numdirpasses = 1; 1151 } else { 1152 offset = node->diroff; 1153 numdirpasses = 2; 1154 nchstats.ncs_2passes++; 1155 } 1156 1157 lookloop: 1158 ds = udf_opendir(node, offset, fsize, udfmp); 1159 1160 while ((fid = udf_getfid(ds)) != NULL) { 1161 1162 /* XXX Should we return an error on a bad fid? */ 1163 if (udf_checktag(&fid->tag, TAGID_FID)) { 1164 printf("udf_lookup: Invalid tag\n"); 1165 error = EIO; 1166 break; 1167 } 1168 1169 /* Is this a deleted file? */ 1170 if (fid->file_char & UDF_FILE_CHAR_DEL) 1171 continue; 1172 1173 if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) { 1174 if (flags & ISDOTDOT) { 1175 id = udf_getid(&fid->icb); 1176 break; 1177 } 1178 } else { 1179 if (!(udf_cmpname(&fid->data[fid->l_iu], 1180 nameptr, fid->l_fi, namelen, udfmp))) { 1181 id = udf_getid(&fid->icb); 1182 break; 1183 } 1184 } 1185 } 1186 1187 if (!error) 1188 error = ds->error; 1189 1190 /* XXX Bail out here? */ 1191 if (error) { 1192 udf_closedir(ds); 1193 return (error); 1194 } 1195 1196 /* Did we have a match? */ 1197 if (id) { 1198 /* 1199 * Remember where this entry was if it's the final 1200 * component. 1201 */ 1202 if ((flags & ISLASTCN) && nameiop == LOOKUP) 1203 node->diroff = ds->offset + ds->off; 1204 if (numdirpasses == 2) 1205 nchstats.ncs_pass2++; 1206 udf_closedir(ds); 1207 1208 if (flags & ISDOTDOT) { 1209 error = vn_vget_ino(dvp, id, lkflags, &tdp); 1210 } else if (node->hash_id == id) { 1211 VREF(dvp); /* we want ourself, ie "." */ 1212 /* 1213 * When we lookup "." we still can be asked to lock it 1214 * differently. 1215 */ 1216 ltype = lkflags & LK_TYPE_MASK; 1217 if (ltype != VOP_ISLOCKED(dvp)) { 1218 if (ltype == LK_EXCLUSIVE) 1219 vn_lock(dvp, LK_UPGRADE | LK_RETRY); 1220 else /* if (ltype == LK_SHARED) */ 1221 vn_lock(dvp, LK_DOWNGRADE | LK_RETRY); 1222 } 1223 tdp = dvp; 1224 } else 1225 error = udf_vget(udfmp->im_mountp, id, lkflags, &tdp); 1226 if (!error) { 1227 *vpp = tdp; 1228 /* Put this entry in the cache */ 1229 if (flags & MAKEENTRY) 1230 cache_enter(dvp, *vpp, a->a_cnp); 1231 } 1232 } else { 1233 /* Name wasn't found on this pass. Do another pass? */ 1234 if (numdirpasses == 2) { 1235 numdirpasses--; 1236 offset = 0; 1237 udf_closedir(ds); 1238 goto lookloop; 1239 } 1240 udf_closedir(ds); 1241 1242 /* Enter name into cache as non-existant */ 1243 if (flags & MAKEENTRY) 1244 cache_enter(dvp, *vpp, a->a_cnp); 1245 1246 if ((flags & ISLASTCN) && 1247 (nameiop == CREATE || nameiop == RENAME)) { 1248 error = EROFS; 1249 } else { 1250 error = ENOENT; 1251 } 1252 } 1253 1254 return (error); 1255 } 1256 1257 static int 1258 udf_reclaim(struct vop_reclaim_args *a) 1259 { 1260 struct vnode *vp; 1261 struct udf_node *unode; 1262 1263 vp = a->a_vp; 1264 unode = VTON(vp); 1265 1266 /* 1267 * Destroy the vm object and flush associated pages. 1268 */ 1269 vnode_destroy_vobject(vp); 1270 1271 if (unode != NULL) { 1272 vfs_hash_remove(vp); 1273 1274 if (unode->fentry != NULL) 1275 free(unode->fentry, M_UDFFENTRY); 1276 uma_zfree(udf_zone_node, unode); 1277 vp->v_data = NULL; 1278 } 1279 1280 return (0); 1281 } 1282 1283 static int 1284 udf_vptofh(struct vop_vptofh_args *a) 1285 { 1286 struct udf_node *node; 1287 struct ifid *ifhp; 1288 1289 node = VTON(a->a_vp); 1290 ifhp = (struct ifid *)a->a_fhp; 1291 ifhp->ifid_len = sizeof(struct ifid); 1292 ifhp->ifid_ino = node->hash_id; 1293 1294 return (0); 1295 } 1296 1297 /* 1298 * Read the block and then set the data pointer to correspond with the 1299 * offset passed in. Only read in at most 'size' bytes, and then set 'size' 1300 * to the number of bytes pointed to. If 'size' is zero, try to read in a 1301 * whole extent. 1302 * 1303 * Note that *bp may be assigned error or not. 1304 * 1305 */ 1306 static int 1307 udf_readatoffset(struct udf_node *node, int *size, off_t offset, 1308 struct buf **bp, uint8_t **data) 1309 { 1310 struct udf_mnt *udfmp = node->udfmp; 1311 struct vnode *vp = node->i_vnode; 1312 struct file_entry *fentry; 1313 struct buf *bp1; 1314 uint32_t max_size; 1315 daddr_t sector; 1316 off_t off; 1317 int adj_size; 1318 int error; 1319 1320 /* 1321 * This call is made *not* only to detect UDF_INVALID_BMAP case, 1322 * max_size is used as an ad-hoc read-ahead hint for "normal" case. 1323 */ 1324 error = udf_bmap_internal(node, offset, §or, &max_size); 1325 if (error == UDF_INVALID_BMAP) { 1326 /* 1327 * This error means that the file *data* is stored in the 1328 * allocation descriptor field of the file entry. 1329 */ 1330 fentry = node->fentry; 1331 *data = &fentry->data[le32toh(fentry->l_ea)]; 1332 *size = le32toh(fentry->l_ad); 1333 if (offset >= *size) 1334 *size = 0; 1335 else { 1336 *data += offset; 1337 *size -= offset; 1338 } 1339 return (0); 1340 } else if (error != 0) { 1341 return (error); 1342 } 1343 1344 /* Adjust the size so that it is within range */ 1345 if (*size == 0 || *size > max_size) 1346 *size = max_size; 1347 1348 /* 1349 * Because we will read starting at block boundary, we need to adjust 1350 * how much we need to read so that all promised data is in. 1351 * Also, we can't promise to read more than MAXBSIZE bytes starting 1352 * from block boundary, so adjust what we promise too. 1353 */ 1354 off = blkoff(udfmp, offset); 1355 *size = min(*size, MAXBSIZE - off); 1356 adj_size = (*size + off + udfmp->bmask) & ~udfmp->bmask; 1357 *bp = NULL; 1358 if ((error = bread(vp, lblkno(udfmp, offset), adj_size, NOCRED, bp))) { 1359 printf("warning: udf_readlblks returned error %d\n", error); 1360 /* note: *bp may be non-NULL */ 1361 return (error); 1362 } 1363 1364 bp1 = *bp; 1365 *data = (uint8_t *)&bp1->b_data[offset & udfmp->bmask]; 1366 return (0); 1367 } 1368 1369 /* 1370 * Translate a file offset into a logical block and then into a physical 1371 * block. 1372 * max_size - maximum number of bytes that can be read starting from given 1373 * offset, rather than beginning of calculated sector number 1374 */ 1375 static int 1376 udf_bmap_internal(struct udf_node *node, off_t offset, daddr_t *sector, 1377 uint32_t *max_size) 1378 { 1379 struct udf_mnt *udfmp; 1380 struct file_entry *fentry; 1381 void *icb; 1382 struct icb_tag *tag; 1383 uint32_t icblen = 0; 1384 daddr_t lsector; 1385 int ad_offset, ad_num = 0; 1386 int i, p_offset; 1387 1388 udfmp = node->udfmp; 1389 fentry = node->fentry; 1390 tag = &fentry->icbtag; 1391 1392 switch (le16toh(tag->strat_type)) { 1393 case 4: 1394 break; 1395 1396 case 4096: 1397 printf("Cannot deal with strategy4096 yet!\n"); 1398 return (ENODEV); 1399 1400 default: 1401 printf("Unknown strategy type %d\n", tag->strat_type); 1402 return (ENODEV); 1403 } 1404 1405 switch (le16toh(tag->flags) & 0x7) { 1406 case 0: 1407 /* 1408 * The allocation descriptor field is filled with short_ad's. 1409 * If the offset is beyond the current extent, look for the 1410 * next extent. 1411 */ 1412 do { 1413 offset -= icblen; 1414 ad_offset = sizeof(struct short_ad) * ad_num; 1415 if (ad_offset > le32toh(fentry->l_ad)) { 1416 printf("File offset out of bounds\n"); 1417 return (EINVAL); 1418 } 1419 icb = GETICB(short_ad, fentry, 1420 le32toh(fentry->l_ea) + ad_offset); 1421 icblen = GETICBLEN(short_ad, icb); 1422 ad_num++; 1423 } while(offset >= icblen); 1424 1425 lsector = (offset >> udfmp->bshift) + 1426 le32toh(((struct short_ad *)(icb))->pos); 1427 1428 *max_size = icblen - offset; 1429 1430 break; 1431 case 1: 1432 /* 1433 * The allocation descriptor field is filled with long_ad's 1434 * If the offset is beyond the current extent, look for the 1435 * next extent. 1436 */ 1437 do { 1438 offset -= icblen; 1439 ad_offset = sizeof(struct long_ad) * ad_num; 1440 if (ad_offset > le32toh(fentry->l_ad)) { 1441 printf("File offset out of bounds\n"); 1442 return (EINVAL); 1443 } 1444 icb = GETICB(long_ad, fentry, 1445 le32toh(fentry->l_ea) + ad_offset); 1446 icblen = GETICBLEN(long_ad, icb); 1447 ad_num++; 1448 } while(offset >= icblen); 1449 1450 lsector = (offset >> udfmp->bshift) + 1451 le32toh(((struct long_ad *)(icb))->loc.lb_num); 1452 1453 *max_size = icblen - offset; 1454 1455 break; 1456 case 3: 1457 /* 1458 * This type means that the file *data* is stored in the 1459 * allocation descriptor field of the file entry. 1460 */ 1461 *max_size = 0; 1462 *sector = node->hash_id + udfmp->part_start; 1463 1464 return (UDF_INVALID_BMAP); 1465 case 2: 1466 /* DirectCD does not use extended_ad's */ 1467 default: 1468 printf("Unsupported allocation descriptor %d\n", 1469 tag->flags & 0x7); 1470 return (ENODEV); 1471 } 1472 1473 *sector = lsector + udfmp->part_start; 1474 1475 /* 1476 * Check the sparing table. Each entry represents the beginning of 1477 * a packet. 1478 */ 1479 if (udfmp->s_table != NULL) { 1480 for (i = 0; i< udfmp->s_table_entries; i++) { 1481 p_offset = 1482 lsector - le32toh(udfmp->s_table->entries[i].org); 1483 if ((p_offset < udfmp->p_sectors) && (p_offset >= 0)) { 1484 *sector = 1485 le32toh(udfmp->s_table->entries[i].map) + 1486 p_offset; 1487 break; 1488 } 1489 } 1490 } 1491 1492 return (0); 1493 }
Cache object: eadced9efc2c3237f76f6d44d5933704
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