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/systm.h> 76 #include <sys/uio.h> 77 #include <sys/bio.h> 78 #include <sys/buf.h> 79 #include <sys/conf.h> 80 #include <sys/dirent.h> 81 #include <sys/fcntl.h> 82 #include <sys/iconv.h> 83 #include <sys/kernel.h> 84 #include <sys/malloc.h> 85 #include <sys/mount.h> 86 #include <sys/namei.h> 87 #include <sys/priv.h> 88 #include <sys/proc.h> 89 #include <sys/queue.h> 90 #include <sys/vnode.h> 91 #include <sys/endian.h> 92 93 #include <geom/geom.h> 94 #include <geom/geom_vfs.h> 95 96 #include <vm/uma.h> 97 98 #include <fs/udf/ecma167-udf.h> 99 #include <fs/udf/osta.h> 100 #include <fs/udf/udf.h> 101 #include <fs/udf/udf_mount.h> 102 103 static MALLOC_DEFINE(M_UDFMOUNT, "udf_mount", "UDF mount structure"); 104 MALLOC_DEFINE(M_UDFFENTRY, "udf_fentry", "UDF file entry structure"); 105 106 struct iconv_functions *udf_iconv = NULL; 107 108 /* Zones */ 109 uma_zone_t udf_zone_trans = NULL; 110 uma_zone_t udf_zone_node = NULL; 111 uma_zone_t udf_zone_ds = NULL; 112 113 static vfs_init_t udf_init; 114 static vfs_uninit_t udf_uninit; 115 static vfs_mount_t udf_mount; 116 static vfs_root_t udf_root; 117 static vfs_statfs_t udf_statfs; 118 static vfs_unmount_t udf_unmount; 119 static vfs_fhtovp_t udf_fhtovp; 120 static vfs_vptofh_t udf_vptofh; 121 122 static int udf_find_partmaps(struct udf_mnt *, struct logvol_desc *); 123 124 static struct vfsops udf_vfsops = { 125 .vfs_fhtovp = udf_fhtovp, 126 .vfs_init = udf_init, 127 .vfs_mount = udf_mount, 128 .vfs_root = udf_root, 129 .vfs_statfs = udf_statfs, 130 .vfs_uninit = udf_uninit, 131 .vfs_unmount = udf_unmount, 132 .vfs_vget = udf_vget, 133 .vfs_vptofh = udf_vptofh, 134 }; 135 VFS_SET(udf_vfsops, udf, VFCF_READONLY); 136 137 MODULE_VERSION(udf, 1); 138 139 static int udf_mountfs(struct vnode *, struct mount *, struct thread *); 140 141 static int 142 udf_init(struct vfsconf *foo) 143 { 144 145 /* 146 * This code used to pre-allocate a certain number of pages for each 147 * pool, reducing the need to grow the zones later on. UMA doesn't 148 * advertise any such functionality, unfortunately =-< 149 */ 150 udf_zone_trans = uma_zcreate("UDF translation buffer, zone", MAXNAMLEN * 151 sizeof(unicode_t), NULL, NULL, NULL, NULL, 0, 0); 152 153 udf_zone_node = uma_zcreate("UDF Node zone", sizeof(struct udf_node), 154 NULL, NULL, NULL, NULL, 0, 0); 155 156 udf_zone_ds = uma_zcreate("UDF Dirstream zone", 157 sizeof(struct udf_dirstream), NULL, NULL, NULL, NULL, 0, 0); 158 159 if ((udf_zone_node == NULL) || (udf_zone_trans == NULL) || 160 (udf_zone_ds == NULL)) { 161 printf("Cannot create allocation zones.\n"); 162 return (ENOMEM); 163 } 164 165 return 0; 166 } 167 168 static int 169 udf_uninit(struct vfsconf *foo) 170 { 171 172 if (udf_zone_trans != NULL) { 173 uma_zdestroy(udf_zone_trans); 174 udf_zone_trans = NULL; 175 } 176 177 if (udf_zone_node != NULL) { 178 uma_zdestroy(udf_zone_node); 179 udf_zone_node = NULL; 180 } 181 182 if (udf_zone_ds != NULL) { 183 uma_zdestroy(udf_zone_ds); 184 udf_zone_ds = NULL; 185 } 186 187 return (0); 188 } 189 190 static int 191 udf_mount(struct mount *mp, struct thread *td) 192 { 193 struct vnode *devvp; /* vnode of the mount device */ 194 struct udf_mnt *imp = 0; 195 struct vfsoptlist *opts; 196 char *fspec, *cs_disk, *cs_local; 197 int error, len, *udf_flags; 198 struct nameidata nd, *ndp = &nd; 199 200 opts = mp->mnt_optnew; 201 202 /* 203 * Unconditionally mount as read-only. 204 */ 205 MNT_ILOCK(mp); 206 mp->mnt_flag |= MNT_RDONLY; 207 MNT_IUNLOCK(mp); 208 209 /* 210 * No root filesystem support. Probably not a big deal, since the 211 * bootloader doesn't understand UDF. 212 */ 213 if (mp->mnt_flag & MNT_ROOTFS) 214 return (ENOTSUP); 215 216 fspec = NULL; 217 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 218 if (!error && fspec[len - 1] != '\0') 219 return (EINVAL); 220 221 if (mp->mnt_flag & MNT_UPDATE) { 222 return (0); 223 } 224 225 /* Check that the mount device exists */ 226 if (fspec == NULL) 227 return (EINVAL); 228 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 229 if ((error = namei(ndp))) 230 return (error); 231 NDFREE(ndp, NDF_ONLY_PNBUF); 232 devvp = ndp->ni_vp; 233 234 if (vn_isdisk(devvp, &error) == 0) { 235 vput(devvp); 236 return (error); 237 } 238 239 /* Check the access rights on the mount device */ 240 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td); 241 if (error) 242 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 243 if (error) { 244 vput(devvp); 245 return (error); 246 } 247 248 if ((error = udf_mountfs(devvp, mp, td))) { 249 vrele(devvp); 250 return (error); 251 } 252 253 imp = VFSTOUDFFS(mp); 254 255 udf_flags = NULL; 256 error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len); 257 if (error || len != sizeof(int)) 258 return (EINVAL); 259 imp->im_flags = *udf_flags; 260 261 if (imp->im_flags & UDFMNT_KICONV && udf_iconv) { 262 cs_disk = NULL; 263 error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len); 264 if (!error && cs_disk[len - 1] != '\0') 265 return (EINVAL); 266 cs_local = NULL; 267 error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len); 268 if (!error && cs_local[len - 1] != '\0') 269 return (EINVAL); 270 udf_iconv->open(cs_local, cs_disk, &imp->im_d2l); 271 #if 0 272 udf_iconv->open(cs_disk, cs_local, &imp->im_l2d); 273 #endif 274 } 275 276 vfs_mountedfrom(mp, fspec); 277 return 0; 278 }; 279 280 /* 281 * Check the descriptor tag for both the correct id and correct checksum. 282 * Return zero if all is good, EINVAL if not. 283 */ 284 int 285 udf_checktag(struct desc_tag *tag, uint16_t id) 286 { 287 uint8_t *itag; 288 uint8_t i, cksum = 0; 289 290 itag = (uint8_t *)tag; 291 292 if (le16toh(tag->id) != id) 293 return (EINVAL); 294 295 for (i = 0; i < 15; i++) 296 cksum = cksum + itag[i]; 297 cksum = cksum - itag[4]; 298 299 if (cksum == tag->cksum) 300 return (0); 301 302 return (EINVAL); 303 } 304 305 static int 306 udf_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td) { 307 struct buf *bp = NULL; 308 struct anchor_vdp avdp; 309 struct udf_mnt *udfmp = NULL; 310 struct part_desc *pd; 311 struct logvol_desc *lvd; 312 struct fileset_desc *fsd; 313 struct file_entry *root_fentry; 314 uint32_t sector, size, mvds_start, mvds_end; 315 uint32_t logical_secsize; 316 uint32_t fsd_offset = 0; 317 uint16_t part_num = 0, fsd_part = 0; 318 int error = EINVAL; 319 int logvol_found = 0, part_found = 0, fsd_found = 0; 320 int bsize; 321 struct g_consumer *cp; 322 struct bufobj *bo; 323 324 DROP_GIANT(); 325 g_topology_lock(); 326 error = g_vfs_open(devvp, &cp, "udf", 0); 327 g_topology_unlock(); 328 PICKUP_GIANT(); 329 VOP_UNLOCK(devvp, 0, td); 330 if (error) 331 return error; 332 333 bo = &devvp->v_bufobj; 334 335 /* XXX: should be M_WAITOK */ 336 MALLOC(udfmp, struct udf_mnt *, sizeof(struct udf_mnt), M_UDFMOUNT, 337 M_NOWAIT | M_ZERO); 338 if (udfmp == NULL) { 339 printf("Cannot allocate UDF mount struct\n"); 340 error = ENOMEM; 341 goto bail; 342 } 343 344 mp->mnt_data = (qaddr_t)udfmp; 345 mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev); 346 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 347 MNT_ILOCK(mp); 348 mp->mnt_flag |= MNT_LOCAL; 349 MNT_IUNLOCK(mp); 350 udfmp->im_mountp = mp; 351 udfmp->im_dev = devvp->v_rdev; 352 udfmp->im_devvp = devvp; 353 udfmp->im_d2l = NULL; 354 udfmp->im_cp = cp; 355 udfmp->im_bo = bo; 356 357 #if 0 358 udfmp->im_l2d = NULL; 359 #endif 360 /* 361 * The UDF specification defines a logical sectorsize of 2048 362 * for DVD media. 363 */ 364 logical_secsize = 2048; 365 366 if (((logical_secsize % cp->provider->sectorsize) != 0) || 367 (logical_secsize < cp->provider->sectorsize)) { 368 DROP_GIANT(); 369 g_topology_lock(); 370 g_vfs_close(cp, td); 371 g_topology_unlock(); 372 PICKUP_GIANT(); 373 return (EINVAL); 374 } 375 376 bsize = cp->provider->sectorsize; 377 378 /* 379 * Get the Anchor Volume Descriptor Pointer from sector 256. 380 * XXX Should also check sector n - 256, n, and 512. 381 */ 382 sector = 256; 383 if ((error = bread(devvp, sector * btodb(logical_secsize), bsize, 384 NOCRED, &bp)) != 0) 385 goto bail; 386 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 387 goto bail; 388 389 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 390 brelse(bp); 391 bp = NULL; 392 393 /* 394 * Extract the Partition Descriptor and Logical Volume Descriptor 395 * from the Volume Descriptor Sequence. 396 * XXX Should we care about the partition type right now? 397 * XXX What about multiple partitions? 398 */ 399 mvds_start = le32toh(avdp.main_vds_ex.loc); 400 mvds_end = mvds_start + (le32toh(avdp.main_vds_ex.len) - 1) / bsize; 401 for (sector = mvds_start; sector < mvds_end; sector++) { 402 if ((error = bread(devvp, sector * btodb(logical_secsize), 403 bsize, NOCRED, &bp)) != 0) { 404 printf("Can't read sector %d of VDS\n", sector); 405 goto bail; 406 } 407 lvd = (struct logvol_desc *)bp->b_data; 408 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 409 udfmp->bsize = le32toh(lvd->lb_size); 410 udfmp->bmask = udfmp->bsize - 1; 411 udfmp->bshift = ffs(udfmp->bsize) - 1; 412 fsd_part = le16toh(lvd->_lvd_use.fsd_loc.loc.part_num); 413 fsd_offset = le32toh(lvd->_lvd_use.fsd_loc.loc.lb_num); 414 if (udf_find_partmaps(udfmp, lvd)) 415 break; 416 logvol_found = 1; 417 } 418 pd = (struct part_desc *)bp->b_data; 419 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 420 part_found = 1; 421 part_num = le16toh(pd->part_num); 422 udfmp->part_len = le32toh(pd->part_len); 423 udfmp->part_start = le32toh(pd->start_loc); 424 } 425 426 brelse(bp); 427 bp = NULL; 428 if ((part_found) && (logvol_found)) 429 break; 430 } 431 432 if (!part_found || !logvol_found) { 433 error = EINVAL; 434 goto bail; 435 } 436 437 if (fsd_part != part_num) { 438 printf("FSD does not lie within the partition!\n"); 439 error = EINVAL; 440 goto bail; 441 } 442 443 444 /* 445 * Grab the Fileset Descriptor 446 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 447 * me in the right direction here. 448 */ 449 sector = udfmp->part_start + fsd_offset; 450 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 451 printf("Cannot read sector %d of FSD\n", sector); 452 goto bail; 453 } 454 fsd = (struct fileset_desc *)bp->b_data; 455 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 456 fsd_found = 1; 457 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 458 sizeof(struct long_ad)); 459 } 460 461 brelse(bp); 462 bp = NULL; 463 464 if (!fsd_found) { 465 printf("Couldn't find the fsd\n"); 466 error = EINVAL; 467 goto bail; 468 } 469 470 /* 471 * Find the file entry for the root directory. 472 */ 473 sector = le32toh(udfmp->root_icb.loc.lb_num) + udfmp->part_start; 474 size = le32toh(udfmp->root_icb.len); 475 if ((error = udf_readlblks(udfmp, sector, size, &bp)) != 0) { 476 printf("Cannot read sector %d\n", sector); 477 goto bail; 478 } 479 480 root_fentry = (struct file_entry *)bp->b_data; 481 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 482 printf("Invalid root file entry!\n"); 483 goto bail; 484 } 485 486 brelse(bp); 487 bp = NULL; 488 489 return 0; 490 491 bail: 492 if (udfmp != NULL) 493 FREE(udfmp, M_UDFMOUNT); 494 if (bp != NULL) 495 brelse(bp); 496 DROP_GIANT(); 497 g_topology_lock(); 498 g_vfs_close(cp, td); 499 g_topology_unlock(); 500 PICKUP_GIANT(); 501 return error; 502 }; 503 504 static int 505 udf_unmount(struct mount *mp, int mntflags, struct thread *td) 506 { 507 struct udf_mnt *udfmp; 508 int error, flags = 0; 509 510 udfmp = VFSTOUDFFS(mp); 511 512 if (mntflags & MNT_FORCE) 513 flags |= FORCECLOSE; 514 515 if ((error = vflush(mp, 0, flags, td))) 516 return (error); 517 518 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 519 if (udfmp->im_d2l) 520 udf_iconv->close(udfmp->im_d2l); 521 #if 0 522 if (udfmp->im_l2d) 523 udf_iconv->close(udfmp->im_l2d); 524 #endif 525 } 526 527 DROP_GIANT(); 528 g_topology_lock(); 529 g_vfs_close(udfmp->im_cp, td); 530 g_topology_unlock(); 531 PICKUP_GIANT(); 532 vrele(udfmp->im_devvp); 533 534 if (udfmp->s_table != NULL) 535 FREE(udfmp->s_table, M_UDFMOUNT); 536 537 FREE(udfmp, M_UDFMOUNT); 538 539 mp->mnt_data = (qaddr_t)0; 540 MNT_ILOCK(mp); 541 mp->mnt_flag &= ~MNT_LOCAL; 542 MNT_IUNLOCK(mp); 543 544 return (0); 545 } 546 547 static int 548 udf_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td) 549 { 550 struct udf_mnt *udfmp; 551 struct vnode *vp; 552 ino_t id; 553 int error; 554 555 udfmp = VFSTOUDFFS(mp); 556 557 id = udf_getid(&udfmp->root_icb); 558 559 error = udf_vget(mp, id, LK_EXCLUSIVE, vpp); 560 if (error) 561 return error; 562 563 vp = *vpp; 564 vp->v_vflag |= VV_ROOT; 565 566 return (0); 567 } 568 569 static int 570 udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 571 { 572 struct udf_mnt *udfmp; 573 574 udfmp = VFSTOUDFFS(mp); 575 576 sbp->f_bsize = udfmp->bsize; 577 sbp->f_iosize = udfmp->bsize; 578 sbp->f_blocks = udfmp->part_len; 579 sbp->f_bfree = 0; 580 sbp->f_bavail = 0; 581 sbp->f_files = 0; 582 sbp->f_ffree = 0; 583 return 0; 584 } 585 586 int 587 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 588 { 589 struct buf *bp; 590 struct vnode *devvp; 591 struct udf_mnt *udfmp; 592 struct thread *td; 593 struct vnode *vp; 594 struct udf_node *unode; 595 struct file_entry *fe; 596 int error, sector, size; 597 598 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 599 if (error || *vpp != NULL) 600 return (error); 601 602 td = curthread; 603 udfmp = VFSTOUDFFS(mp); 604 605 unode = uma_zalloc(udf_zone_node, M_WAITOK | M_ZERO); 606 607 if ((error = udf_allocv(mp, &vp, td))) { 608 printf("Error from udf_allocv\n"); 609 uma_zfree(udf_zone_node, unode); 610 return (error); 611 } 612 613 unode->i_vnode = vp; 614 unode->hash_id = ino; 615 unode->udfmp = udfmp; 616 vp->v_data = unode; 617 618 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 619 if (error || *vpp != NULL) 620 return (error); 621 622 /* 623 * Copy in the file entry. Per the spec, the size can only be 1 block. 624 */ 625 sector = ino + udfmp->part_start; 626 devvp = udfmp->im_devvp; 627 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 628 printf("Cannot read sector %d\n", sector); 629 vput(vp); 630 brelse(bp); 631 *vpp = NULL; 632 return (error); 633 } 634 635 fe = (struct file_entry *)bp->b_data; 636 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 637 printf("Invalid file entry!\n"); 638 vput(vp); 639 brelse(bp); 640 *vpp = NULL; 641 return (ENOMEM); 642 } 643 size = UDF_FENTRY_SIZE + le32toh(fe->l_ea) + le32toh(fe->l_ad); 644 MALLOC(unode->fentry, struct file_entry *, size, M_UDFFENTRY, 645 M_NOWAIT | M_ZERO); 646 if (unode->fentry == NULL) { 647 printf("Cannot allocate file entry block\n"); 648 vput(vp); 649 brelse(bp); 650 *vpp = NULL; 651 return (ENOMEM); 652 } 653 654 bcopy(bp->b_data, unode->fentry, size); 655 656 brelse(bp); 657 bp = NULL; 658 659 switch (unode->fentry->icbtag.file_type) { 660 default: 661 vp->v_type = VBAD; 662 break; 663 case 4: 664 vp->v_type = VDIR; 665 break; 666 case 5: 667 vp->v_type = VREG; 668 break; 669 case 6: 670 vp->v_type = VBLK; 671 break; 672 case 7: 673 vp->v_type = VCHR; 674 break; 675 case 9: 676 vp->v_type = VFIFO; 677 break; 678 case 10: 679 vp->v_type = VSOCK; 680 break; 681 case 12: 682 vp->v_type = VLNK; 683 break; 684 } 685 *vpp = vp; 686 687 return (0); 688 } 689 690 struct ifid { 691 u_short ifid_len; 692 u_short ifid_pad; 693 int ifid_ino; 694 long ifid_start; 695 }; 696 697 static int 698 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 699 { 700 struct ifid *ifhp; 701 struct vnode *nvp; 702 int error; 703 704 ifhp = (struct ifid *)fhp; 705 706 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 707 *vpp = NULLVP; 708 return (error); 709 } 710 711 *vpp = nvp; 712 vnode_create_vobject(*vpp, 0, curthread); 713 return (0); 714 } 715 716 static int 717 udf_vptofh (struct vnode *vp, struct fid *fhp) 718 { 719 struct udf_node *node; 720 struct ifid *ifhp; 721 722 node = VTON(vp); 723 ifhp = (struct ifid *)fhp; 724 ifhp->ifid_len = sizeof(struct ifid); 725 ifhp->ifid_ino = node->hash_id; 726 727 return (0); 728 } 729 730 static int 731 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 732 { 733 struct part_map_spare *pms; 734 struct regid *pmap_id; 735 struct buf *bp; 736 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 737 int i, k, ptype, psize, error; 738 uint8_t *pmap = (uint8_t *) &lvd->maps[0]; 739 740 for (i = 0; i < le32toh(lvd->n_pm); i++) { 741 ptype = pmap[0]; 742 psize = pmap[1]; 743 if (((ptype != 1) && (ptype != 2)) || 744 ((psize != UDF_PMAP_TYPE1_SIZE) && 745 (psize != UDF_PMAP_TYPE2_SIZE))) { 746 printf("Invalid partition map found\n"); 747 return (1); 748 } 749 750 if (ptype == 1) { 751 /* Type 1 map. We don't care */ 752 pmap += UDF_PMAP_TYPE1_SIZE; 753 continue; 754 } 755 756 /* Type 2 map. Gotta find out the details */ 757 pmap_id = (struct regid *)&pmap[4]; 758 bzero(®id_id[0], UDF_REGID_ID_SIZE); 759 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 760 761 if (bcmp(®id_id[0], "*UDF Sparable Partition", 762 UDF_REGID_ID_SIZE)) { 763 printf("Unsupported partition map: %s\n", ®id_id[0]); 764 return (1); 765 } 766 767 pms = (struct part_map_spare *)pmap; 768 pmap += UDF_PMAP_TYPE2_SIZE; 769 MALLOC(udfmp->s_table, struct udf_sparing_table *, 770 le32toh(pms->st_size), M_UDFMOUNT, M_NOWAIT | M_ZERO); 771 if (udfmp->s_table == NULL) 772 return (ENOMEM); 773 774 /* Calculate the number of sectors per packet. */ 775 /* XXX Logical or physical? */ 776 udfmp->p_sectors = le16toh(pms->packet_len) / udfmp->bsize; 777 778 /* 779 * XXX If reading the first Sparing Table fails, should look 780 * for another table. 781 */ 782 if ((error = udf_readlblks(udfmp, le32toh(pms->st_loc[0]), 783 le32toh(pms->st_size), &bp)) != 0) { 784 if (bp != NULL) 785 brelse(bp); 786 printf("Failed to read Sparing Table at sector %d\n", 787 le32toh(pms->st_loc[0])); 788 FREE(udfmp->s_table, M_UDFMOUNT); 789 return (error); 790 } 791 bcopy(bp->b_data, udfmp->s_table, le32toh(pms->st_size)); 792 brelse(bp); 793 794 if (udf_checktag(&udfmp->s_table->tag, 0)) { 795 printf("Invalid sparing table found\n"); 796 FREE(udfmp->s_table, M_UDFMOUNT); 797 return (EINVAL); 798 } 799 800 /* See how many valid entries there are here. The list is 801 * supposed to be sorted. 0xfffffff0 and higher are not valid 802 */ 803 for (k = 0; k < le16toh(udfmp->s_table->rt_l); k++) { 804 udfmp->s_table_entries = k; 805 if (le32toh(udfmp->s_table->entries[k].org) >= 806 0xfffffff0) 807 break; 808 } 809 } 810 811 return (0); 812 } 813