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 * $FreeBSD$ 27 */ 28 29 /* udf_vfsops.c */ 30 /* Implement the VFS side of things */ 31 32 /* 33 * Ok, here's how it goes. The UDF specs are pretty clear on how each data 34 * structure is made up, but not very clear on how they relate to each other. 35 * Here is the skinny... This demostrates a filesystem with one file in the 36 * root directory. Subdirectories are treated just as normal files, but they 37 * have File Id Descriptors of their children as their file data. As for the 38 * Anchor Volume Descriptor Pointer, it can exist in two of the following three 39 * places: sector 256, sector n (the max sector of the disk), or sector 40 * n - 256. It's a pretty good bet that one will exist at sector 256 though. 41 * One caveat is unclosed CD media. For that, sector 256 cannot be written, 42 * so the Anchor Volume Descriptor Pointer can exist at sector 512 until the 43 * media is closed. 44 * 45 * Sector: 46 * 256: 47 * n: Anchor Volume Descriptor Pointer 48 * n - 256: | 49 * | 50 * |-->Main Volume Descriptor Sequence 51 * | | 52 * | | 53 * | |-->Logical Volume Descriptor 54 * | | 55 * |-->Partition Descriptor | 56 * | | 57 * | | 58 * |-->Fileset Descriptor 59 * | 60 * | 61 * |-->Root Dir File Entry 62 * | 63 * | 64 * |-->File data: 65 * File Id Descriptor 66 * | 67 * | 68 * |-->File Entry 69 * | 70 * | 71 * |-->File data 72 */ 73 #include <sys/types.h> 74 #include <sys/param.h> 75 #include <sys/namei.h> 76 #include <sys/vnode.h> 77 #include <sys/mount.h> 78 #include <sys/systm.h> 79 #include <sys/proc.h> 80 #include <sys/fcntl.h> 81 #include <sys/bio.h> 82 #include <sys/buf.h> 83 #include <sys/malloc.h> 84 #include <sys/kernel.h> 85 #include <sys/mount.h> 86 #include <sys/conf.h> 87 #include <sys/queue.h> 88 #include <sys/dirent.h> 89 90 #include <vm/uma.h> 91 92 #include <fs/udf/ecma167-udf.h> 93 #include <fs/udf/udf.h> 94 #include <fs/udf/osta.h> 95 96 MALLOC_DEFINE(M_UDFMOUNT, "UDF mount", "UDF mount structure"); 97 MALLOC_DEFINE(M_UDFFENTRY, "UDF fentry", "UDF file entry structure"); 98 MALLOC_DEFINE(M_UDFSTABLE, "UDF s_table", "UDF sparing table"); 99 100 /* Zones */ 101 uma_zone_t udf_zone_trans = NULL; 102 uma_zone_t udf_zone_node = NULL; 103 104 static int udf_init(struct vfsconf *); 105 static int udf_uninit(struct vfsconf *); 106 static int udf_mount(struct mount *, struct nameidata *, struct thread *); 107 static int udf_unmount(struct mount *, int, struct thread *); 108 static int udf_root(struct mount *, struct vnode **); 109 static int udf_statfs(struct mount *, struct statfs *, struct thread *); 110 static int udf_fhtovp(struct mount *, struct fid *, struct vnode **); 111 static int udf_vptofh(struct vnode *, struct fid *); 112 static int udf_find_partmaps(struct udf_mnt *, struct logvol_desc *); 113 114 static struct vfsops udf_vfsops = { 115 NULL, 116 vfs_stdstart, 117 udf_unmount, 118 udf_root, 119 vfs_stdquotactl, 120 udf_statfs, 121 vfs_stdsync, 122 udf_vget, 123 udf_fhtovp, 124 vfs_stdcheckexp, 125 udf_vptofh, 126 udf_init, 127 udf_uninit, 128 vfs_stdextattrctl, 129 udf_mount, 130 }; 131 VFS_SET(udf_vfsops, udf, VFCF_READONLY); 132 133 static int udf_mountfs(struct vnode *, struct mount *, struct thread *); 134 135 static int 136 udf_init(struct vfsconf *foo) 137 { 138 139 /* 140 * This code used to pre-allocate a certain number of pages for each 141 * pool, reducing the need to grow the zones later on. UMA doesn't 142 * advertise any such functionality, unfortunately =-< 143 */ 144 udf_zone_trans = uma_zcreate("UDF translation buffer, zone", MAXNAMLEN * 145 sizeof(unicode_t), NULL, NULL, NULL, NULL, 0, 0); 146 147 udf_zone_node = uma_zcreate("UDF Node zone", sizeof(struct udf_node), 148 NULL, NULL, NULL, NULL, 0, 0); 149 150 if ((udf_zone_node == NULL) || (udf_zone_trans == NULL)) { 151 printf("Cannot create allocation zones.\n"); 152 return (ENOMEM); 153 } 154 155 return 0; 156 } 157 158 static int 159 udf_uninit(struct vfsconf *foo) 160 { 161 162 if (udf_zone_trans != NULL) { 163 uma_zdestroy(udf_zone_trans); 164 udf_zone_trans = NULL; 165 } 166 167 if (udf_zone_node != NULL) { 168 uma_zdestroy(udf_zone_node); 169 udf_zone_node = NULL; 170 } 171 172 return (0); 173 } 174 175 static int 176 udf_mount(struct mount *mp, struct nameidata *ndp, struct thread *td) 177 { 178 struct vnode *devvp; /* vnode of the mount device */ 179 struct udf_mnt *imp = 0; 180 struct export_args *export; 181 struct vfsoptlist *opts; 182 char *fspec; 183 size_t size; 184 int error, len; 185 186 opts = mp->mnt_optnew; 187 188 if ((mp->mnt_flag & MNT_RDONLY) == 0) 189 return (EROFS); 190 191 /* 192 * No root filesystem support. Probably not a big deal, since the 193 * bootloader doesn't understand UDF. 194 */ 195 if (mp->mnt_flag & MNT_ROOTFS) 196 return (ENOTSUP); 197 198 fspec = NULL; 199 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 200 if (!error && fspec[len - 1] != '\0') 201 return (EINVAL); 202 203 if (mp->mnt_flag & MNT_UPDATE) { 204 imp = VFSTOUDFFS(mp); 205 if (fspec == NULL) { 206 error = vfs_getopt(opts, "export", (void **)&export, 207 &len); 208 if (error || len != sizeof(struct export_args)) 209 return (EINVAL); 210 return (vfs_export(mp, export)); 211 } 212 } 213 214 /* Check that the mount device exists */ 215 if (fspec == NULL) 216 return (EINVAL); 217 NDINIT(ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 218 if ((error = namei(ndp))) 219 return (error); 220 NDFREE(ndp, NDF_ONLY_PNBUF); 221 devvp = ndp->ni_vp; 222 223 if (vn_isdisk(devvp, &error) == 0) { 224 vrele(devvp); 225 return (error); 226 } 227 228 /* Check the access rights on the mount device */ 229 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 230 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td); 231 if (error) 232 error = suser(td); 233 if (error) { 234 vput(devvp); 235 return (error); 236 } 237 VOP_UNLOCK(devvp, 0, td); 238 239 if ((error = udf_mountfs(devvp, mp, td))) { 240 vrele(devvp); 241 return (error); 242 } 243 244 imp = VFSTOUDFFS(mp); 245 copystr(fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); 246 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 247 udf_statfs(mp, &mp->mnt_stat, td); 248 return 0; 249 }; 250 251 /* 252 * Check the descriptor tag for both the correct id and correct checksum. 253 * Return zero if all is good, EINVAL if not. 254 */ 255 int 256 udf_checktag(struct desc_tag *tag, uint16_t id) 257 { 258 uint8_t *itag; 259 uint8_t i, cksum = 0; 260 261 itag = (uint8_t *)tag; 262 263 if (tag->id != id) 264 return (EINVAL); 265 266 for (i = 0; i < 15; i++) 267 cksum = cksum + itag[i]; 268 cksum = cksum - itag[4]; 269 270 if (cksum == tag->cksum) 271 return (0); 272 273 return (EINVAL); 274 } 275 276 static int 277 udf_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td) { 278 struct buf *bp = NULL; 279 struct anchor_vdp avdp; 280 struct udf_mnt *udfmp = NULL; 281 struct part_desc *pd; 282 struct logvol_desc *lvd; 283 struct fileset_desc *fsd; 284 struct file_entry *root_fentry; 285 uint32_t sector, size, mvds_start, mvds_end; 286 uint32_t fsd_offset = 0; 287 uint16_t part_num = 0, fsd_part = 0; 288 int error = EINVAL, needclose = 0; 289 int logvol_found = 0, part_found = 0, fsd_found = 0; 290 int bsize; 291 292 /* 293 * Disallow multiple mounts of the same device. Flush the buffer 294 * cache for the device. 295 */ 296 if ((error = vfs_mountedon(devvp))) 297 return (error); 298 if (vcount(devvp) > 1) 299 return (EBUSY); 300 if ((error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0))) 301 return (error); 302 303 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 304 error = VOP_OPEN(devvp, FREAD, FSCRED, td); 305 VOP_UNLOCK(devvp, 0, td); 306 if (error) 307 return error; 308 needclose = 1; 309 310 MALLOC(udfmp, struct udf_mnt *, sizeof(struct udf_mnt), M_UDFMOUNT, 311 M_NOWAIT | M_ZERO); 312 if (udfmp == NULL) { 313 printf("Cannot allocate UDF mount struct\n"); 314 error = ENOMEM; 315 goto bail; 316 } 317 318 mp->mnt_data = (qaddr_t)udfmp; 319 mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev); 320 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 321 mp->mnt_flag |= MNT_LOCAL; 322 udfmp->im_mountp = mp; 323 udfmp->im_dev = devvp->v_rdev; 324 udfmp->im_devvp = devvp; 325 326 bsize = 2048; /* XXX Should probe the media for it's size */ 327 328 /* 329 * Get the Anchor Volume Descriptor Pointer from sector 256. 330 * XXX Should also check sector n - 256, n, and 512. 331 */ 332 sector = 256; 333 if ((error = bread(devvp, sector * btodb(bsize), bsize, NOCRED, 334 &bp)) != 0) 335 goto bail; 336 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 337 goto bail; 338 339 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 340 brelse(bp); 341 bp = NULL; 342 343 /* 344 * Extract the Partition Descriptor and Logical Volume Descriptor 345 * from the Volume Descriptor Sequence. 346 * XXX Should we care about the partition type right now? 347 * XXX What about multiple partitions? 348 */ 349 mvds_start = avdp.main_vds_ex.loc; 350 mvds_end = mvds_start + (avdp.main_vds_ex.len - 1) / bsize; 351 for (sector = mvds_start; sector < mvds_end; sector++) { 352 if ((error = bread(devvp, sector * btodb(bsize), bsize, 353 NOCRED, &bp)) != 0) { 354 printf("Can't read sector %d of VDS\n", sector); 355 goto bail; 356 } 357 lvd = (struct logvol_desc *)bp->b_data; 358 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 359 udfmp->bsize = lvd->lb_size; 360 udfmp->bmask = udfmp->bsize - 1; 361 udfmp->bshift = ffs(udfmp->bsize) - 1; 362 fsd_part = lvd->_lvd_use.fsd_loc.loc.part_num; 363 fsd_offset = lvd->_lvd_use.fsd_loc.loc.lb_num; 364 if (udf_find_partmaps(udfmp, lvd)) 365 break; 366 logvol_found = 1; 367 } 368 pd = (struct part_desc *)bp->b_data; 369 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 370 part_found = 1; 371 part_num = pd->part_num; 372 udfmp->part_len = pd->part_len; 373 udfmp->part_start = pd->start_loc; 374 } 375 376 brelse(bp); 377 bp = NULL; 378 if ((part_found) && (logvol_found)) 379 break; 380 } 381 382 if (!part_found || !logvol_found) { 383 error = EINVAL; 384 goto bail; 385 } 386 387 if (fsd_part != part_num) { 388 printf("FSD does not lie within the partition!\n"); 389 error = EINVAL; 390 goto bail; 391 } 392 393 394 /* 395 * Grab the Fileset Descriptor 396 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 397 * me in the right direction here. 398 */ 399 sector = udfmp->part_start + fsd_offset; 400 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 401 printf("Cannot read sector %d of FSD\n", sector); 402 goto bail; 403 } 404 fsd = (struct fileset_desc *)bp->b_data; 405 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 406 fsd_found = 1; 407 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 408 sizeof(struct long_ad)); 409 } 410 411 brelse(bp); 412 bp = NULL; 413 414 if (!fsd_found) { 415 printf("Couldn't find the fsd\n"); 416 error = EINVAL; 417 goto bail; 418 } 419 420 /* 421 * Find the file entry for the root directory. 422 */ 423 sector = udfmp->root_icb.loc.lb_num + udfmp->part_start; 424 size = udfmp->root_icb.len; 425 if ((error = udf_readlblks(udfmp, sector, size, &bp)) != 0) { 426 printf("Cannot read sector %d\n", sector); 427 goto bail; 428 } 429 430 root_fentry = (struct file_entry *)bp->b_data; 431 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 432 printf("Invalid root file entry!\n"); 433 goto bail; 434 } 435 436 brelse(bp); 437 bp = NULL; 438 439 TAILQ_INIT(&udfmp->udf_tqh); 440 devvp->v_rdev->si_mountpoint = mp; 441 442 mtx_init(&udfmp->hash_mtx, "udf_hash", NULL, MTX_DEF); 443 return 0; 444 445 bail: 446 if (udfmp != NULL) 447 FREE(udfmp, M_UDFMOUNT); 448 if (bp != NULL) 449 brelse(bp); 450 if (needclose) 451 VOP_CLOSE(devvp, FREAD, NOCRED, td); 452 return error; 453 }; 454 455 static int 456 udf_unmount(struct mount *mp, int mntflags, struct thread *td) 457 { 458 struct udf_mnt *udfmp; 459 int error, flags = 0; 460 461 udfmp = VFSTOUDFFS(mp); 462 463 if (mntflags & MNT_FORCE) 464 flags |= FORCECLOSE; 465 466 if ((error = vflush(mp, 0, flags))) 467 return (error); 468 469 udfmp->im_devvp->v_rdev->si_mountpoint = NULL; 470 error = VOP_CLOSE(udfmp->im_devvp, FREAD, NOCRED, td); 471 vrele(udfmp->im_devvp); 472 473 if (udfmp->s_table != NULL) 474 FREE(udfmp->s_table, M_UDFSTABLE); 475 FREE(udfmp, M_UDFMOUNT); 476 477 mp->mnt_data = (qaddr_t)0; 478 mp->mnt_flag &= ~MNT_LOCAL; 479 480 return (0); 481 } 482 483 static int 484 udf_root(struct mount *mp, struct vnode **vpp) 485 { 486 struct udf_mnt *udfmp; 487 struct vnode *vp; 488 ino_t id; 489 int error; 490 491 udfmp = VFSTOUDFFS(mp); 492 493 id = udf_getid(&udfmp->root_icb); 494 495 error = udf_vget(mp, id, LK_EXCLUSIVE, vpp); 496 if (error) 497 return error; 498 499 vp = *vpp; 500 vp->v_flag |= VROOT; 501 udfmp->root_vp = vp; 502 503 return (0); 504 } 505 506 static int 507 udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 508 { 509 struct udf_mnt *udfmp; 510 511 udfmp = VFSTOUDFFS(mp); 512 513 sbp->f_bsize = udfmp->bsize; 514 sbp->f_iosize = udfmp->bsize; 515 sbp->f_blocks = udfmp->part_len; 516 sbp->f_bfree = 0; 517 sbp->f_bavail = 0; 518 sbp->f_files = 0; 519 sbp->f_ffree = 0; 520 if (sbp != &mp->mnt_stat) { 521 sbp->f_type = mp->mnt_vfc->vfc_typenum; 522 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 523 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 524 } 525 526 return 0; 527 } 528 529 int 530 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 531 { 532 struct buf *bp; 533 struct vnode *devvp; 534 struct udf_mnt *udfmp; 535 struct thread *td; 536 struct vnode *vp; 537 struct udf_node *unode; 538 struct file_entry *fe; 539 int error, sector, size; 540 541 td = curthread; 542 udfmp = VFSTOUDFFS(mp); 543 544 /* See if we already have this in the cache */ 545 if ((error = udf_hashlookup(udfmp, ino, flags, vpp)) != 0) 546 return (error); 547 if (*vpp != NULL) { 548 return (0); 549 } 550 551 /* 552 * Allocate memory and check the tag id's before grabbing a new 553 * vnode, since it's hard to roll back if there is a problem. 554 */ 555 unode = uma_zalloc(udf_zone_node, M_WAITOK); 556 if (unode == NULL) { 557 printf("Cannot allocate udf node\n"); 558 return (ENOMEM); 559 } 560 561 /* 562 * Copy in the file entry. Per the spec, the size can only be 1 block. 563 */ 564 sector = ino + udfmp->part_start; 565 devvp = udfmp->im_devvp; 566 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 567 printf("Cannot read sector %d\n", sector); 568 uma_zfree(udf_zone_node, unode); 569 return (error); 570 } 571 572 fe = (struct file_entry *)bp->b_data; 573 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 574 printf("Invalid file entry!\n"); 575 uma_zfree(udf_zone_node, unode); 576 brelse(bp); 577 return (ENOMEM); 578 } 579 size = UDF_FENTRY_SIZE + fe->l_ea + fe->l_ad; 580 MALLOC(unode->fentry, struct file_entry *, size, M_UDFFENTRY, 581 M_NOWAIT | M_ZERO); 582 if (unode->fentry == NULL) { 583 printf("Cannot allocate file entry block\n"); 584 uma_zfree(udf_zone_node, unode); 585 brelse(bp); 586 return (ENOMEM); 587 } 588 589 bcopy(bp->b_data, unode->fentry, size); 590 591 brelse(bp); 592 bp = NULL; 593 594 if ((error = udf_allocv(mp, &vp, td))) { 595 printf("Error from udf_allocv\n"); 596 uma_zfree(udf_zone_node, unode); 597 return (error); 598 } 599 600 unode->i_vnode = vp; 601 unode->hash_id = ino; 602 unode->i_devvp = udfmp->im_devvp; 603 unode->i_dev = udfmp->im_dev; 604 unode->udfmp = udfmp; 605 vp->v_data = unode; 606 lockinit(&vp->v_lock, PINOD, "udfnode", 0, 0); 607 vp->v_vnlock = &vp->v_lock; 608 VREF(udfmp->im_devvp); 609 udf_hashins(unode); 610 611 switch (unode->fentry->icbtag.file_type) { 612 default: 613 vp->v_type = VBAD; 614 break; 615 case 4: 616 vp->v_type = VDIR; 617 break; 618 case 5: 619 vp->v_type = VREG; 620 break; 621 case 6: 622 vp->v_type = VBLK; 623 break; 624 case 7: 625 vp->v_type = VCHR; 626 break; 627 case 9: 628 vp->v_type = VFIFO; 629 break; 630 case 10: 631 vp->v_type = VSOCK; 632 break; 633 case 12: 634 vp->v_type = VLNK; 635 break; 636 } 637 *vpp = vp; 638 639 return (0); 640 } 641 642 struct ifid { 643 ushort ifid_len; 644 ushort ifid_pad; 645 int ifid_ino; 646 long ifid_start; 647 }; 648 649 static int 650 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 651 { 652 struct ifid *ifhp; 653 struct vnode *nvp; 654 int error; 655 656 ifhp = (struct ifid *)fhp; 657 658 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 659 *vpp = NULLVP; 660 return (error); 661 } 662 663 *vpp = nvp; 664 return (0); 665 } 666 667 static int 668 udf_vptofh (struct vnode *vp, struct fid *fhp) 669 { 670 struct udf_node *node; 671 struct ifid *ifhp; 672 673 node = VTON(vp); 674 ifhp = (struct ifid *)fhp; 675 ifhp->ifid_len = sizeof(struct ifid); 676 ifhp->ifid_ino = node->hash_id; 677 678 return (0); 679 } 680 681 static int 682 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 683 { 684 union udf_pmap *pmap; 685 struct part_map_spare *pms; 686 struct regid *pmap_id; 687 struct buf *bp; 688 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 689 int i, ptype, psize, error; 690 691 for (i = 0; i < lvd->n_pm; i++) { 692 pmap = (union udf_pmap *)&lvd->maps[i * UDF_PMAP_SIZE]; 693 ptype = pmap->data[0]; 694 psize = pmap->data[1]; 695 if (((ptype != 1) && (ptype != 2)) || 696 ((psize != UDF_PMAP_SIZE) && (psize != 6))) { 697 printf("Invalid partition map found\n"); 698 return (1); 699 } 700 701 if (ptype == 1) { 702 /* Type 1 map. We don't care */ 703 continue; 704 } 705 706 /* Type 2 map. Gotta find out the details */ 707 pmap_id = (struct regid *)&pmap->data[4]; 708 bzero(®id_id[0], UDF_REGID_ID_SIZE); 709 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 710 711 if (bcmp(®id_id[0], "*UDF Sparable Partition", 712 UDF_REGID_ID_SIZE)) { 713 printf("Unsupported partition map: %s\n", ®id_id[0]); 714 return (1); 715 } 716 717 pms = &pmap->pms; 718 MALLOC(udfmp->s_table, struct udf_sparing_table *, pms->st_size, 719 M_UDFSTABLE, M_NOWAIT | M_ZERO); 720 if (udfmp->s_table == NULL) 721 return (ENOMEM); 722 723 /* Calculate the number of sectors per packet. */ 724 /* XXX Logical or physical? */ 725 udfmp->p_sectors = pms->packet_len / udfmp->bsize; 726 727 /* 728 * XXX If reading the first Sparing Table fails, should look 729 * for another table. 730 */ 731 if ((error = udf_readlblks(udfmp, pms->st_loc[0], pms->st_size, 732 &bp)) != 0) { 733 printf("Failed to read Sparing Table at sector %d\n", 734 pms->st_loc[0]); 735 return (error); 736 } 737 bcopy(bp->b_data, udfmp->s_table, pms->st_size); 738 brelse(bp); 739 740 if (udf_checktag(&udfmp->s_table->tag, 0)) { 741 printf("Invalid sparing table found\n"); 742 return (EINVAL); 743 } 744 745 /* See how many valid entries there are here. The list is 746 * supposed to be sorted. 0xfffffff0 and higher are not valid 747 */ 748 for (i = 0; i < udfmp->s_table->rt_l; i++) { 749 udfmp->s_table_entries = i; 750 if (udfmp->s_table->entries[i].org >= 0xfffffff0) 751 break; 752 } 753 } 754 755 return (0); 756 } 757