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