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