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 1.10 2004/11/12 00:09:51 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/nlookup.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 thread *); 104 static int udf_unmount(struct mount *, int, struct thread *); 105 static int udf_root(struct mount *, struct vnode **); 106 static int udf_statfs(struct mount *, struct statfs *, struct thread *); 107 static int udf_fhtovp(struct mount *, struct fid *, struct vnode **); 108 static int udf_vptofh(struct vnode *, struct fid *); 109 110 static int udf_find_partmaps(struct udf_mnt *, struct logvol_desc *); 111 112 static struct vfsops udf_vfsops = { 113 udf_mount, 114 vfs_stdstart, 115 udf_unmount, 116 udf_root, 117 vfs_stdquotactl, 118 udf_statfs, 119 vfs_stdsync, 120 udf_vget, 121 udf_fhtovp, 122 vfs_stdcheckexp, 123 udf_vptofh, 124 vfs_stdinit, 125 vfs_stduninit, 126 vfs_stdextattrctl, 127 }; 128 VFS_SET(udf_vfsops, udf, VFCF_READONLY); 129 130 MODULE_VERSION(udf, 1); 131 132 static int udf_mountfs(struct vnode *, struct mount *, struct thread *); 133 134 static int 135 udf_mount(struct mount *mp, char *path, caddr_t data, struct thread *td) 136 { 137 struct vnode *devvp; /* vnode of the mount device */ 138 struct udf_args args; 139 struct udf_mnt *imp = 0; 140 size_t size; 141 int error; 142 struct nlookupdata nd; 143 144 if ((mp->mnt_flag & MNT_RDONLY) == 0) 145 return (EROFS); 146 147 /* 148 * No root filesystem support. Probably not a big deal, since the 149 * bootloader doesn't understand UDF. 150 */ 151 if (mp->mnt_flag & MNT_ROOTFS) 152 return (ENOTSUP); 153 154 if ((error = copyin(data, (caddr_t)&args, sizeof(struct udf_args)))) 155 return(error); 156 157 if (mp->mnt_flag & MNT_UPDATE) { 158 imp = VFSTOUDFFS(mp); 159 if (args.fspec == NULL) 160 return(vfs_export(mp, &imp->im_export, &args.export)); 161 } 162 163 /* Check that the mount device exists */ 164 devvp = NULL; 165 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW); 166 if (error == 0) 167 error = nlookup(&nd); 168 if (error == 0) 169 error = cache_vref(nd.nl_ncp, nd.nl_cred, &devvp); 170 nlookup_done(&nd); 171 if (error) 172 return (error); 173 174 if (vn_isdisk(devvp, &error) == 0) { 175 vrele(devvp); 176 return(error); 177 } 178 179 /* Check the access rights on the mount device */ 180 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 181 error = VOP_ACCESS(devvp, VREAD, td->td_proc->p_ucred, td); 182 if (error) 183 error = suser(td); 184 if (error) { 185 vput(devvp); 186 return(error); 187 } 188 VOP_UNLOCK(devvp, 0, td); 189 190 if ((error = udf_mountfs(devvp, mp, td))) { 191 vrele(devvp); 192 return(error); 193 } 194 195 imp = VFSTOUDFFS(mp); 196 197 imp->im_flags = args.flags; 198 199 copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 200 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 201 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); 202 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 203 udf_statfs(mp, &mp->mnt_stat, td); 204 return(0); 205 } 206 207 /* 208 * Check the descriptor tag for both the correct id and correct checksum. 209 * Return zero if all is good, EINVAL if not. 210 */ 211 int 212 udf_checktag(struct desc_tag *tag, uint16_t id) 213 { 214 uint8_t *itag; 215 uint8_t i, cksum = 0; 216 217 itag = (uint8_t *)tag; 218 219 if (tag->id != id) 220 return(EINVAL); 221 222 for (i = 0; i < 15; i++) 223 cksum = cksum + itag[i]; 224 cksum = cksum - itag[4]; 225 226 if (cksum == tag->cksum) 227 return(0); 228 229 return(EINVAL); 230 } 231 232 static int 233 udf_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td) 234 { 235 struct buf *bp = NULL; 236 struct anchor_vdp avdp; 237 struct udf_mnt *udfmp = NULL; 238 struct part_desc *pd; 239 struct logvol_desc *lvd; 240 struct fileset_desc *fsd; 241 struct file_entry *root_fentry; 242 dev_t dev; 243 uint32_t sector, size, mvds_start, mvds_end; 244 uint32_t fsd_offset = 0; 245 uint16_t part_num = 0, fsd_part = 0; 246 int error = EINVAL, needclose = 0; 247 int logvol_found = 0, part_found = 0, fsd_found = 0; 248 int bsize; 249 250 /* 251 * Disallow multiple mounts of the same device. Flush the buffer 252 * cache for the device. 253 */ 254 if ((error = vfs_mountedon(devvp))) 255 return(error); 256 if (count_udev(devvp->v_udev) > 0) 257 return(EBUSY); 258 if ((error = vinvalbuf(devvp, V_SAVE, td, 0, 0))) 259 return(error); 260 261 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 262 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL, td); 263 VOP_UNLOCK(devvp, 0, td); 264 if (error) 265 return(error); 266 needclose = 1; 267 dev = devvp->v_rdev; 268 269 udfmp = malloc(sizeof(*udfmp), M_UDFMOUNT, M_WAITOK | M_ZERO); 270 271 mp->mnt_data = (qaddr_t)udfmp; 272 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 273 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 274 mp->mnt_maxsymlinklen = 0; 275 mp->mnt_flag |= MNT_LOCAL; 276 udfmp->im_mountp = mp; 277 udfmp->im_dev = dev; 278 udfmp->im_devvp = devvp; 279 280 bsize = 2048; /* XXX Should probe the media for it's size */ 281 282 /* 283 * Get the Anchor Volume Descriptor Pointer from sector 256. 284 * XXX Should also check sector n - 256, n, and 512. 285 */ 286 sector = 256; 287 if ((error = bread(devvp, sector * btodb(bsize), bsize, &bp)) != 0) 288 goto bail; 289 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 290 goto bail; 291 292 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 293 brelse(bp); 294 bp = NULL; 295 296 /* 297 * Extract the Partition Descriptor and Logical Volume Descriptor 298 * from the Volume Descriptor Sequence. 299 * XXX Should we care about the partition type right now? 300 * XXX What about multiple partitions? 301 */ 302 mvds_start = avdp.main_vds_ex.loc; 303 mvds_end = mvds_start + (avdp.main_vds_ex.len - 1) / bsize; 304 for (sector = mvds_start; sector < mvds_end; sector++) { 305 if ((error = bread(devvp, sector * btodb(bsize), bsize, 306 &bp)) != 0) { 307 printf("Can't read sector %d of VDS\n", sector); 308 goto bail; 309 } 310 lvd = (struct logvol_desc *)bp->b_data; 311 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 312 udfmp->bsize = lvd->lb_size; 313 udfmp->bmask = udfmp->bsize - 1; 314 udfmp->bshift = ffs(udfmp->bsize) - 1; 315 fsd_part = lvd->_lvd_use.fsd_loc.loc.part_num; 316 fsd_offset = lvd->_lvd_use.fsd_loc.loc.lb_num; 317 if (udf_find_partmaps(udfmp, lvd)) 318 break; 319 logvol_found = 1; 320 } 321 pd = (struct part_desc *)bp->b_data; 322 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 323 part_found = 1; 324 part_num = pd->part_num; 325 udfmp->part_len = pd->part_len; 326 udfmp->part_start = pd->start_loc; 327 } 328 329 brelse(bp); 330 bp = NULL; 331 if ((part_found) && (logvol_found)) 332 break; 333 } 334 335 if (!part_found || !logvol_found) { 336 error = EINVAL; 337 goto bail; 338 } 339 340 if (fsd_part != part_num) { 341 printf("FSD does not lie within the partition!\n"); 342 error = EINVAL; 343 goto bail; 344 } 345 346 347 /* 348 * Grab the Fileset Descriptor 349 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 350 * me in the right direction here. 351 */ 352 sector = udfmp->part_start + fsd_offset; 353 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 354 printf("Cannot read sector %d of FSD\n", sector); 355 goto bail; 356 } 357 fsd = (struct fileset_desc *)bp->b_data; 358 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 359 fsd_found = 1; 360 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 361 sizeof(struct long_ad)); 362 } 363 364 brelse(bp); 365 bp = NULL; 366 367 if (!fsd_found) { 368 printf("Couldn't find the fsd\n"); 369 error = EINVAL; 370 goto bail; 371 } 372 373 vfs_add_vnodeops(&mp->mnt_vn_ops, udf_vnodeop_entries); 374 375 /* 376 * Find the file entry for the root directory. 377 */ 378 sector = udfmp->root_icb.loc.lb_num + udfmp->part_start; 379 size = udfmp->root_icb.len; 380 if ((error = udf_readlblks(udfmp, sector, size, &bp)) != 0) { 381 printf("Cannot read sector %d\n", sector); 382 goto bail; 383 } 384 385 root_fentry = (struct file_entry *)bp->b_data; 386 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 387 printf("Invalid root file entry!\n"); 388 goto bail; 389 } 390 391 brelse(bp); 392 bp = NULL; 393 394 lwkt_token_init(&udfmp->hash_token); 395 udfmp->hashtbl = phashinit(UDF_HASHTBLSIZE, M_UDFMOUNT, &udfmp->hashsz); 396 397 return(0); 398 399 bail: 400 if (udfmp != NULL) 401 free(udfmp, M_UDFMOUNT); 402 if (bp != NULL) 403 brelse(bp); 404 if (needclose) 405 VOP_CLOSE(devvp, FREAD, td); 406 return(error); 407 } 408 409 static int 410 udf_unmount(struct mount *mp, int mntflags, struct thread *td) 411 { 412 struct udf_mnt *udfmp; 413 int error, flags = 0; 414 415 udfmp = VFSTOUDFFS(mp); 416 417 if (mntflags & MNT_FORCE) 418 flags |= FORCECLOSE; 419 420 if ((error = vflush(mp, 0, flags))) 421 return (error); 422 423 udfmp->im_devvp->v_rdev->si_mountpoint = NULL; 424 error = VOP_CLOSE(udfmp->im_devvp, FREAD, td); 425 vrele(udfmp->im_devvp); 426 427 if (udfmp->s_table) 428 free(udfmp->s_table, M_UDFMOUNT); 429 if (udfmp->hashtbl) 430 free(udfmp->hashtbl, M_UDFMOUNT); 431 free(udfmp, M_UDFMOUNT); 432 433 mp->mnt_data = (qaddr_t)0; 434 mp->mnt_flag &= ~MNT_LOCAL; 435 436 return (error); 437 } 438 439 static int 440 udf_root(struct mount *mp, struct vnode **vpp) 441 { 442 struct udf_mnt *udfmp; 443 struct vnode *vp; 444 ino_t id; 445 int error; 446 447 udfmp = VFSTOUDFFS(mp); 448 449 id = udf_getid(&udfmp->root_icb); 450 451 error = udf_vget(mp, id, vpp); 452 if (error) 453 return(error); 454 455 vp = *vpp; 456 vp->v_flag |= VROOT; 457 udfmp->root_vp = vp; 458 459 return(0); 460 } 461 462 static int 463 udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 464 { 465 struct udf_mnt *udfmp; 466 467 udfmp = VFSTOUDFFS(mp); 468 469 sbp->f_bsize = udfmp->bsize; 470 sbp->f_iosize = udfmp->bsize; 471 sbp->f_blocks = udfmp->part_len; 472 sbp->f_bfree = 0; 473 sbp->f_bavail = 0; 474 sbp->f_files = 0; 475 sbp->f_ffree = 0; 476 if (sbp != &mp->mnt_stat) { 477 sbp->f_type = mp->mnt_vfc->vfc_typenum; 478 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 479 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 480 } 481 482 return(0); 483 } 484 485 int 486 udf_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 487 { 488 struct buf *bp; 489 struct vnode *devvp; 490 struct udf_mnt *udfmp; 491 struct thread *td; 492 struct vnode *vp; 493 struct udf_node *unode; 494 struct file_entry *fe; 495 int error, sector, size; 496 497 td = curthread; 498 udfmp = VFSTOUDFFS(mp); 499 500 /* See if we already have this in the cache */ 501 if ((error = udf_hashlookup(udfmp, ino, vpp)) != 0) 502 return(error); 503 if (*vpp != NULL) { 504 return(0); 505 } 506 507 /* 508 * Allocate memory and check the tag id's before grabbing a new 509 * vnode, since it's hard to roll back if there is a problem. 510 */ 511 unode = malloc(sizeof(*unode), M_UDFNODE, M_WAITOK | M_ZERO); 512 513 /* 514 * Copy in the file entry. Per the spec, the size can only be 1 block. 515 */ 516 sector = ino + udfmp->part_start; 517 devvp = udfmp->im_devvp; 518 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 519 printf("Cannot read sector %d\n", sector); 520 free(unode, M_UDFNODE); 521 return(error); 522 } 523 524 fe = (struct file_entry *)bp->b_data; 525 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 526 printf("Invalid file entry!\n"); 527 free(unode, M_UDFNODE); 528 brelse(bp); 529 return(ENOMEM); 530 } 531 size = UDF_FENTRY_SIZE + fe->l_ea + fe->l_ad; 532 unode->fentry = malloc(size, M_UDFFENTRY, M_WAITOK | M_ZERO); 533 534 bcopy(bp->b_data, unode->fentry, size); 535 536 brelse(bp); 537 bp = NULL; 538 539 if ((error = udf_allocv(mp, &vp))) { 540 printf("Error from udf_allocv\n"); 541 free(unode, M_UDFNODE); 542 return(error); 543 } 544 545 unode->i_vnode = vp; 546 unode->hash_id = ino; 547 unode->i_devvp = udfmp->im_devvp; 548 unode->i_dev = udfmp->im_dev; 549 unode->udfmp = udfmp; 550 vp->v_data = unode; 551 vref(udfmp->im_devvp); 552 udf_hashins(unode); 553 554 switch (unode->fentry->icbtag.file_type) { 555 default: 556 vp->v_type = VBAD; 557 break; 558 case 4: 559 vp->v_type = VDIR; 560 break; 561 case 5: 562 vp->v_type = VREG; 563 break; 564 case 6: 565 vp->v_type = VBLK; 566 break; 567 case 7: 568 vp->v_type = VCHR; 569 break; 570 case 9: 571 vp->v_type = VFIFO; 572 break; 573 case 10: 574 vp->v_type = VSOCK; 575 break; 576 case 12: 577 vp->v_type = VLNK; 578 break; 579 } 580 /* 581 * Locked and refd vnode returned 582 */ 583 *vpp = vp; 584 585 return(0); 586 } 587 588 struct ifid { 589 u_short ifid_len; 590 u_short ifid_pad; 591 int ifid_ino; 592 long ifid_start; 593 }; 594 595 static int 596 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 597 { 598 struct ifid *ifhp; 599 struct vnode *nvp; 600 int error; 601 602 ifhp = (struct ifid *)fhp; 603 604 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 605 *vpp = NULLVP; 606 return(error); 607 } 608 609 *vpp = nvp; 610 return(0); 611 } 612 613 static int 614 udf_vptofh (struct vnode *vp, struct fid *fhp) 615 { 616 struct udf_node *node; 617 struct ifid *ifhp; 618 619 node = VTON(vp); 620 ifhp = (struct ifid *)fhp; 621 ifhp->ifid_len = sizeof(struct ifid); 622 ifhp->ifid_ino = node->hash_id; 623 624 return(0); 625 } 626 627 static int 628 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 629 { 630 union udf_pmap *pmap; 631 struct part_map_spare *pms; 632 struct regid *pmap_id; 633 struct buf *bp; 634 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 635 int ptype, psize, error; 636 unsigned int i; 637 638 for (i = 0; i < lvd->n_pm; i++) { 639 pmap = (union udf_pmap *)&lvd->maps[i * UDF_PMAP_SIZE]; 640 ptype = pmap->data[0]; 641 psize = pmap->data[1]; 642 if (((ptype != 1) && (ptype != 2)) || 643 ((psize != UDF_PMAP_SIZE) && (psize != 6))) { 644 printf("Invalid partition map found\n"); 645 return(1); 646 } 647 648 if (ptype == 1) { 649 /* Type 1 map. We don't care */ 650 continue; 651 } 652 653 /* Type 2 map. Gotta find out the details */ 654 pmap_id = (struct regid *)&pmap->data[4]; 655 bzero(®id_id[0], UDF_REGID_ID_SIZE); 656 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 657 658 if (bcmp(®id_id[0], "*UDF Sparable Partition", 659 UDF_REGID_ID_SIZE)) { 660 printf("Unsupported partition map: %s\n", ®id_id[0]); 661 return(1); 662 } 663 664 pms = &pmap->pms; 665 udfmp->s_table = malloc(pms->st_size, M_UDFMOUNT, 666 M_WAITOK | M_ZERO); 667 if (udfmp->s_table == NULL) 668 return(ENOMEM); 669 670 /* Calculate the number of sectors per packet. */ 671 /* XXX Logical or physical? */ 672 udfmp->p_sectors = pms->packet_len / udfmp->bsize; 673 674 /* 675 * XXX If reading the first Sparing Table fails, should look 676 * for another table. 677 */ 678 if ((error = udf_readlblks(udfmp, pms->st_loc[0], pms->st_size, 679 &bp)) != 0) { 680 if (bp) 681 brelse(bp); 682 printf("Failed to read Sparing Table at sector %d\n", 683 pms->st_loc[0]); 684 return(error); 685 } 686 bcopy(bp->b_data, udfmp->s_table, pms->st_size); 687 brelse(bp); 688 689 if (udf_checktag(&udfmp->s_table->tag, 0)) { 690 printf("Invalid sparing table found\n"); 691 return(EINVAL); 692 } 693 694 /* See how many valid entries there are here. The list is 695 * supposed to be sorted. 0xfffffff0 and higher are not valid 696 */ 697 for (i = 0; i < udfmp->s_table->rt_l; i++) { 698 udfmp->s_table_entries = i; 699 if (udfmp->s_table->entries[i].org >= 0xfffffff0) 700 break; 701 } 702 } 703 704 return(0); 705 } 706