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: src/sys/fs/udf/udf_vfsops.c,v 1.16 2003/11/05 06:56:08 scottl Exp $ 27 * $DragonFly: src/sys/vfs/udf/udf_vfsops.c,v 1.7 2004/08/17 18:57:35 dillon Exp $ 28 */ 29 30 /* udf_vfsops.c */ 31 /* Implement the VFS side of things */ 32 33 /* 34 * Ok, here's how it goes. The UDF specs are pretty clear on how each data 35 * structure is made up, but not very clear on how they relate to each other. 36 * Here is the skinny... This demostrates a filesystem with one file in the 37 * root directory. Subdirectories are treated just as normal files, but they 38 * have File Id Descriptors of their children as their file data. As for the 39 * Anchor Volume Descriptor Pointer, it can exist in two of the following three 40 * places: sector 256, sector n (the max sector of the disk), or sector 41 * n - 256. It's a pretty good bet that one will exist at sector 256 though. 42 * One caveat is unclosed CD media. For that, sector 256 cannot be written, 43 * so the Anchor Volume Descriptor Pointer can exist at sector 512 until the 44 * media is closed. 45 * 46 * Sector: 47 * 256: 48 * n: Anchor Volume Descriptor Pointer 49 * n - 256: | 50 * | 51 * |-->Main Volume Descriptor Sequence 52 * | | 53 * | | 54 * | |-->Logical Volume Descriptor 55 * | | 56 * |-->Partition Descriptor | 57 * | | 58 * | | 59 * |-->Fileset Descriptor 60 * | 61 * | 62 * |-->Root Dir File Entry 63 * | 64 * | 65 * |-->File data: 66 * File Id Descriptor 67 * | 68 * | 69 * |-->File Entry 70 * | 71 * | 72 * |-->File data 73 */ 74 75 #include <sys/types.h> 76 #include <sys/param.h> 77 #include <sys/systm.h> 78 #include <sys/uio.h> 79 #include <sys/buf.h> 80 #include <sys/conf.h> 81 #include <sys/dirent.h> 82 #include <sys/fcntl.h> 83 #include <sys/module.h> 84 #include <sys/kernel.h> 85 #include <sys/malloc.h> 86 #include <sys/mount.h> 87 #include <sys/namei.h> 88 #include <sys/proc.h> 89 #include <sys/queue.h> 90 #include <sys/vnode.h> 91 92 #include <vfs/udf/ecma167-udf.h> 93 #include <vfs/udf/osta.h> 94 #include <vfs/udf/udf.h> 95 #include <vfs/udf/udf_mount.h> 96 97 extern struct vnodeopv_entry_desc udf_vnodeop_entries[]; 98 99 MALLOC_DEFINE(M_UDFNODE, "UDF node", "UDF node structure"); 100 MALLOC_DEFINE(M_UDFMOUNT, "UDF mount", "UDF mount structure"); 101 MALLOC_DEFINE(M_UDFFENTRY, "UDF fentry", "UDF file entry structure"); 102 103 static int udf_mount(struct mount *, char *, caddr_t, struct nameidata *, 104 struct thread *); 105 static int udf_unmount(struct mount *, int, struct thread *); 106 static int udf_root(struct mount *, struct vnode **); 107 static int udf_statfs(struct mount *, struct statfs *, struct thread *); 108 static int udf_fhtovp(struct mount *, struct fid *, struct vnode **); 109 static int udf_vptofh(struct vnode *, struct fid *); 110 111 static int udf_find_partmaps(struct udf_mnt *, struct logvol_desc *); 112 113 static struct vfsops udf_vfsops = { 114 udf_mount, 115 vfs_stdstart, 116 udf_unmount, 117 udf_root, 118 vfs_stdquotactl, 119 udf_statfs, 120 vfs_stdsync, 121 udf_vget, 122 udf_fhtovp, 123 vfs_stdcheckexp, 124 udf_vptofh, 125 vfs_stdinit, 126 vfs_stduninit, 127 vfs_stdextattrctl, 128 }; 129 VFS_SET(udf_vfsops, udf, VFCF_READONLY); 130 131 MODULE_VERSION(udf, 1); 132 133 static int udf_mountfs(struct vnode *, struct mount *, struct thread *); 134 135 static int 136 udf_mount(struct mount *mp, char *path, caddr_t data, struct nameidata *ndp, 137 struct thread *td) 138 { 139 struct vnode *devvp; /* vnode of the mount device */ 140 struct udf_args args; 141 struct udf_mnt *imp = 0; 142 size_t size; 143 int error; 144 145 if ((mp->mnt_flag & MNT_RDONLY) == 0) 146 return (EROFS); 147 148 /* 149 * No root filesystem support. Probably not a big deal, since the 150 * bootloader doesn't understand UDF. 151 */ 152 if (mp->mnt_flag & MNT_ROOTFS) 153 return (ENOTSUP); 154 155 if ((error = copyin(data, (caddr_t)&args, sizeof(struct udf_args)))) 156 return(error); 157 158 if (mp->mnt_flag & MNT_UPDATE) { 159 imp = VFSTOUDFFS(mp); 160 if (args.fspec == NULL) 161 return(vfs_export(mp, &imp->im_export, &args.export)); 162 } 163 164 /* Check that the mount device exists */ 165 NDINIT(ndp, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, args.fspec, td); 166 if ((error = namei(ndp))) 167 return(error); 168 NDFREE(ndp, NDF_ONLY_PNBUF); 169 devvp = ndp->ni_vp; 170 171 if (vn_isdisk(devvp, &error) == 0) { 172 vrele(devvp); 173 return(error); 174 } 175 176 /* Check the access rights on the mount device */ 177 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 178 error = VOP_ACCESS(devvp, VREAD, td->td_proc->p_ucred, td); 179 if (error) 180 error = suser(td); 181 if (error) { 182 vput(devvp); 183 return(error); 184 } 185 VOP_UNLOCK(devvp, NULL, 0, td); 186 187 if ((error = udf_mountfs(devvp, mp, td))) { 188 vrele(devvp); 189 return(error); 190 } 191 192 imp = VFSTOUDFFS(mp); 193 194 imp->im_flags = args.flags; 195 196 copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 197 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 198 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); 199 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 200 udf_statfs(mp, &mp->mnt_stat, td); 201 return(0); 202 } 203 204 /* 205 * Check the descriptor tag for both the correct id and correct checksum. 206 * Return zero if all is good, EINVAL if not. 207 */ 208 int 209 udf_checktag(struct desc_tag *tag, uint16_t id) 210 { 211 uint8_t *itag; 212 uint8_t i, cksum = 0; 213 214 itag = (uint8_t *)tag; 215 216 if (tag->id != id) 217 return(EINVAL); 218 219 for (i = 0; i < 15; i++) 220 cksum = cksum + itag[i]; 221 cksum = cksum - itag[4]; 222 223 if (cksum == tag->cksum) 224 return(0); 225 226 return(EINVAL); 227 } 228 229 static int 230 udf_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td) 231 { 232 struct buf *bp = NULL; 233 struct anchor_vdp avdp; 234 struct udf_mnt *udfmp = NULL; 235 struct part_desc *pd; 236 struct logvol_desc *lvd; 237 struct fileset_desc *fsd; 238 struct file_entry *root_fentry; 239 dev_t dev; 240 uint32_t sector, size, mvds_start, mvds_end; 241 uint32_t fsd_offset = 0; 242 uint16_t part_num = 0, fsd_part = 0; 243 int error = EINVAL, needclose = 0; 244 int logvol_found = 0, part_found = 0, fsd_found = 0; 245 int bsize; 246 247 /* 248 * Disallow multiple mounts of the same device. Flush the buffer 249 * cache for the device. 250 */ 251 if ((error = vfs_mountedon(devvp))) 252 return(error); 253 if (count_udev(devvp->v_udev) > 0) 254 return(EBUSY); 255 if ((error = vinvalbuf(devvp, V_SAVE, td, 0, 0))) 256 return(error); 257 258 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 259 error = VOP_OPEN(devvp, FREAD, FSCRED, td); 260 VOP_UNLOCK(devvp, NULL, 0, td); 261 if (error) 262 return(error); 263 needclose = 1; 264 dev = devvp->v_rdev; 265 266 udfmp = malloc(sizeof(*udfmp), M_UDFMOUNT, M_WAITOK | M_ZERO); 267 268 mp->mnt_data = (qaddr_t)udfmp; 269 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 270 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 271 mp->mnt_maxsymlinklen = 0; 272 mp->mnt_flag |= MNT_LOCAL; 273 udfmp->im_mountp = mp; 274 udfmp->im_dev = dev; 275 udfmp->im_devvp = devvp; 276 277 bsize = 2048; /* XXX Should probe the media for it's size */ 278 279 /* 280 * Get the Anchor Volume Descriptor Pointer from sector 256. 281 * XXX Should also check sector n - 256, n, and 512. 282 */ 283 sector = 256; 284 if ((error = bread(devvp, sector * btodb(bsize), bsize, &bp)) != 0) 285 goto bail; 286 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 287 goto bail; 288 289 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 290 brelse(bp); 291 bp = NULL; 292 293 /* 294 * Extract the Partition Descriptor and Logical Volume Descriptor 295 * from the Volume Descriptor Sequence. 296 * XXX Should we care about the partition type right now? 297 * XXX What about multiple partitions? 298 */ 299 mvds_start = avdp.main_vds_ex.loc; 300 mvds_end = mvds_start + (avdp.main_vds_ex.len - 1) / bsize; 301 for (sector = mvds_start; sector < mvds_end; sector++) { 302 if ((error = bread(devvp, sector * btodb(bsize), bsize, 303 &bp)) != 0) { 304 printf("Can't read sector %d of VDS\n", sector); 305 goto bail; 306 } 307 lvd = (struct logvol_desc *)bp->b_data; 308 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 309 udfmp->bsize = lvd->lb_size; 310 udfmp->bmask = udfmp->bsize - 1; 311 udfmp->bshift = ffs(udfmp->bsize) - 1; 312 fsd_part = lvd->_lvd_use.fsd_loc.loc.part_num; 313 fsd_offset = lvd->_lvd_use.fsd_loc.loc.lb_num; 314 if (udf_find_partmaps(udfmp, lvd)) 315 break; 316 logvol_found = 1; 317 } 318 pd = (struct part_desc *)bp->b_data; 319 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 320 part_found = 1; 321 part_num = pd->part_num; 322 udfmp->part_len = pd->part_len; 323 udfmp->part_start = pd->start_loc; 324 } 325 326 brelse(bp); 327 bp = NULL; 328 if ((part_found) && (logvol_found)) 329 break; 330 } 331 332 if (!part_found || !logvol_found) { 333 error = EINVAL; 334 goto bail; 335 } 336 337 if (fsd_part != part_num) { 338 printf("FSD does not lie within the partition!\n"); 339 error = EINVAL; 340 goto bail; 341 } 342 343 344 /* 345 * Grab the Fileset Descriptor 346 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 347 * me in the right direction here. 348 */ 349 sector = udfmp->part_start + fsd_offset; 350 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 351 printf("Cannot read sector %d of FSD\n", sector); 352 goto bail; 353 } 354 fsd = (struct fileset_desc *)bp->b_data; 355 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 356 fsd_found = 1; 357 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 358 sizeof(struct long_ad)); 359 } 360 361 brelse(bp); 362 bp = NULL; 363 364 if (!fsd_found) { 365 printf("Couldn't find the fsd\n"); 366 error = EINVAL; 367 goto bail; 368 } 369 370 vfs_add_vnodeops(&mp->mnt_vn_ops, udf_vnodeop_entries); 371 372 /* 373 * Find the file entry for the root directory. 374 */ 375 sector = udfmp->root_icb.loc.lb_num + udfmp->part_start; 376 size = udfmp->root_icb.len; 377 if ((error = udf_readlblks(udfmp, sector, size, &bp)) != 0) { 378 printf("Cannot read sector %d\n", sector); 379 goto bail; 380 } 381 382 root_fentry = (struct file_entry *)bp->b_data; 383 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 384 printf("Invalid root file entry!\n"); 385 goto bail; 386 } 387 388 brelse(bp); 389 bp = NULL; 390 391 lwkt_token_init(&udfmp->hash_token); 392 udfmp->hashtbl = phashinit(UDF_HASHTBLSIZE, M_UDFMOUNT, &udfmp->hashsz); 393 394 return(0); 395 396 bail: 397 if (udfmp != NULL) 398 free(udfmp, M_UDFMOUNT); 399 if (bp != NULL) 400 brelse(bp); 401 if (needclose) 402 VOP_CLOSE(devvp, FREAD, td); 403 return(error); 404 } 405 406 static int 407 udf_unmount(struct mount *mp, int mntflags, struct thread *td) 408 { 409 struct udf_mnt *udfmp; 410 int error, flags = 0; 411 412 udfmp = VFSTOUDFFS(mp); 413 414 if (mntflags & MNT_FORCE) 415 flags |= FORCECLOSE; 416 417 if ((error = vflush(mp, 0, flags))) 418 return (error); 419 420 udfmp->im_devvp->v_rdev->si_mountpoint = NULL; 421 error = VOP_CLOSE(udfmp->im_devvp, FREAD, td); 422 vrele(udfmp->im_devvp); 423 424 if (udfmp->s_table) 425 free(udfmp->s_table, M_UDFMOUNT); 426 if (udfmp->hashtbl) 427 free(udfmp->hashtbl, M_UDFMOUNT); 428 free(udfmp, M_UDFMOUNT); 429 430 mp->mnt_data = (qaddr_t)0; 431 mp->mnt_flag &= ~MNT_LOCAL; 432 433 return (error); 434 } 435 436 static int 437 udf_root(struct mount *mp, struct vnode **vpp) 438 { 439 struct udf_mnt *udfmp; 440 struct vnode *vp; 441 ino_t id; 442 int error; 443 444 udfmp = VFSTOUDFFS(mp); 445 446 id = udf_getid(&udfmp->root_icb); 447 448 error = udf_vget(mp, id, vpp); 449 if (error) 450 return(error); 451 452 vp = *vpp; 453 vp->v_flag |= VROOT; 454 udfmp->root_vp = vp; 455 456 return(0); 457 } 458 459 static int 460 udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 461 { 462 struct udf_mnt *udfmp; 463 464 udfmp = VFSTOUDFFS(mp); 465 466 sbp->f_bsize = udfmp->bsize; 467 sbp->f_iosize = udfmp->bsize; 468 sbp->f_blocks = udfmp->part_len; 469 sbp->f_bfree = 0; 470 sbp->f_bavail = 0; 471 sbp->f_files = 0; 472 sbp->f_ffree = 0; 473 if (sbp != &mp->mnt_stat) { 474 sbp->f_type = mp->mnt_vfc->vfc_typenum; 475 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 476 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 477 } 478 479 return(0); 480 } 481 482 int 483 udf_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 484 { 485 struct buf *bp; 486 struct vnode *devvp; 487 struct udf_mnt *udfmp; 488 struct thread *td; 489 struct vnode *vp; 490 struct udf_node *unode; 491 struct file_entry *fe; 492 int error, sector, size; 493 494 td = curthread; 495 udfmp = VFSTOUDFFS(mp); 496 497 /* See if we already have this in the cache */ 498 if ((error = udf_hashlookup(udfmp, ino, vpp)) != 0) 499 return(error); 500 if (*vpp != NULL) { 501 return(0); 502 } 503 504 /* 505 * Allocate memory and check the tag id's before grabbing a new 506 * vnode, since it's hard to roll back if there is a problem. 507 */ 508 unode = malloc(sizeof(*unode), M_UDFNODE, M_WAITOK | M_ZERO); 509 510 /* 511 * Copy in the file entry. Per the spec, the size can only be 1 block. 512 */ 513 sector = ino + udfmp->part_start; 514 devvp = udfmp->im_devvp; 515 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 516 printf("Cannot read sector %d\n", sector); 517 free(unode, M_UDFNODE); 518 return(error); 519 } 520 521 fe = (struct file_entry *)bp->b_data; 522 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 523 printf("Invalid file entry!\n"); 524 free(unode, M_UDFNODE); 525 brelse(bp); 526 return(ENOMEM); 527 } 528 size = UDF_FENTRY_SIZE + fe->l_ea + fe->l_ad; 529 unode->fentry = malloc(size, M_UDFFENTRY, M_WAITOK | M_ZERO); 530 531 bcopy(bp->b_data, unode->fentry, size); 532 533 brelse(bp); 534 bp = NULL; 535 536 if ((error = udf_allocv(mp, &vp))) { 537 printf("Error from udf_allocv\n"); 538 free(unode, M_UDFNODE); 539 return(error); 540 } 541 542 unode->i_vnode = vp; 543 unode->hash_id = ino; 544 unode->i_devvp = udfmp->im_devvp; 545 unode->i_dev = udfmp->im_dev; 546 unode->udfmp = udfmp; 547 vp->v_data = unode; 548 vref(udfmp->im_devvp); 549 udf_hashins(unode); 550 551 switch (unode->fentry->icbtag.file_type) { 552 default: 553 vp->v_type = VBAD; 554 break; 555 case 4: 556 vp->v_type = VDIR; 557 break; 558 case 5: 559 vp->v_type = VREG; 560 break; 561 case 6: 562 vp->v_type = VBLK; 563 break; 564 case 7: 565 vp->v_type = VCHR; 566 break; 567 case 9: 568 vp->v_type = VFIFO; 569 break; 570 case 10: 571 vp->v_type = VSOCK; 572 break; 573 case 12: 574 vp->v_type = VLNK; 575 break; 576 } 577 *vpp = vp; 578 579 return(0); 580 } 581 582 struct ifid { 583 u_short ifid_len; 584 u_short ifid_pad; 585 int ifid_ino; 586 long ifid_start; 587 }; 588 589 static int 590 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 591 { 592 struct ifid *ifhp; 593 struct vnode *nvp; 594 int error; 595 596 ifhp = (struct ifid *)fhp; 597 598 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 599 *vpp = NULLVP; 600 return(error); 601 } 602 603 *vpp = nvp; 604 return(0); 605 } 606 607 static int 608 udf_vptofh (struct vnode *vp, struct fid *fhp) 609 { 610 struct udf_node *node; 611 struct ifid *ifhp; 612 613 node = VTON(vp); 614 ifhp = (struct ifid *)fhp; 615 ifhp->ifid_len = sizeof(struct ifid); 616 ifhp->ifid_ino = node->hash_id; 617 618 return(0); 619 } 620 621 static int 622 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 623 { 624 union udf_pmap *pmap; 625 struct part_map_spare *pms; 626 struct regid *pmap_id; 627 struct buf *bp; 628 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 629 int ptype, psize, error; 630 unsigned int i; 631 632 for (i = 0; i < lvd->n_pm; i++) { 633 pmap = (union udf_pmap *)&lvd->maps[i * UDF_PMAP_SIZE]; 634 ptype = pmap->data[0]; 635 psize = pmap->data[1]; 636 if (((ptype != 1) && (ptype != 2)) || 637 ((psize != UDF_PMAP_SIZE) && (psize != 6))) { 638 printf("Invalid partition map found\n"); 639 return(1); 640 } 641 642 if (ptype == 1) { 643 /* Type 1 map. We don't care */ 644 continue; 645 } 646 647 /* Type 2 map. Gotta find out the details */ 648 pmap_id = (struct regid *)&pmap->data[4]; 649 bzero(®id_id[0], UDF_REGID_ID_SIZE); 650 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 651 652 if (bcmp(®id_id[0], "*UDF Sparable Partition", 653 UDF_REGID_ID_SIZE)) { 654 printf("Unsupported partition map: %s\n", ®id_id[0]); 655 return(1); 656 } 657 658 pms = &pmap->pms; 659 udfmp->s_table = malloc(pms->st_size, M_UDFMOUNT, 660 M_WAITOK | M_ZERO); 661 if (udfmp->s_table == NULL) 662 return(ENOMEM); 663 664 /* Calculate the number of sectors per packet. */ 665 /* XXX Logical or physical? */ 666 udfmp->p_sectors = pms->packet_len / udfmp->bsize; 667 668 /* 669 * XXX If reading the first Sparing Table fails, should look 670 * for another table. 671 */ 672 if ((error = udf_readlblks(udfmp, pms->st_loc[0], pms->st_size, 673 &bp)) != 0) { 674 if (bp) 675 brelse(bp); 676 printf("Failed to read Sparing Table at sector %d\n", 677 pms->st_loc[0]); 678 return(error); 679 } 680 bcopy(bp->b_data, udfmp->s_table, pms->st_size); 681 brelse(bp); 682 683 if (udf_checktag(&udfmp->s_table->tag, 0)) { 684 printf("Invalid sparing table found\n"); 685 return(EINVAL); 686 } 687 688 /* See how many valid entries there are here. The list is 689 * supposed to be sorted. 0xfffffff0 and higher are not valid 690 */ 691 for (i = 0; i < udfmp->s_table->rt_l; i++) { 692 udfmp->s_table_entries = i; 693 if (udfmp->s_table->entries[i].org >= 0xfffffff0) 694 break; 695 } 696 } 697 698 return(0); 699 } 700