1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 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; 120 121 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 }; 133 VFS_SET(udf_vfsops, udf, VFCF_READONLY); 134 135 MODULE_VERSION(udf, 1); 136 137 static int udf_mountfs(struct vnode *, struct mount *); 138 139 static int 140 udf_init(struct vfsconf *foo) 141 { 142 143 udf_zone_trans = uma_zcreate("UDF translation buffer, zone", MAXNAMLEN * 144 sizeof(unicode_t), NULL, NULL, NULL, NULL, 0, 0); 145 146 udf_zone_node = uma_zcreate("UDF Node zone", sizeof(struct udf_node), 147 NULL, NULL, NULL, NULL, 0, 0); 148 149 udf_zone_ds = uma_zcreate("UDF Dirstream zone", 150 sizeof(struct udf_dirstream), NULL, NULL, NULL, NULL, 0, 0); 151 152 return 0; 153 } 154 155 static int 156 udf_uninit(struct vfsconf *foo) 157 { 158 159 if (udf_zone_trans != NULL) { 160 uma_zdestroy(udf_zone_trans); 161 udf_zone_trans = NULL; 162 } 163 164 if (udf_zone_node != NULL) { 165 uma_zdestroy(udf_zone_node); 166 udf_zone_node = NULL; 167 } 168 169 if (udf_zone_ds != NULL) { 170 uma_zdestroy(udf_zone_ds); 171 udf_zone_ds = NULL; 172 } 173 174 return (0); 175 } 176 177 static int 178 udf_mount(struct mount *mp) 179 { 180 struct vnode *devvp; /* vnode of the mount device */ 181 struct thread *td; 182 struct udf_mnt *imp = NULL; 183 struct vfsoptlist *opts; 184 char *fspec, *cs_disk, *cs_local; 185 int error, len, *udf_flags; 186 struct nameidata nd, *ndp = &nd; 187 188 td = curthread; 189 opts = mp->mnt_optnew; 190 191 /* 192 * Unconditionally mount as read-only. 193 */ 194 MNT_ILOCK(mp); 195 mp->mnt_flag |= MNT_RDONLY; 196 MNT_IUNLOCK(mp); 197 198 /* 199 * No root filesystem support. Probably not a big deal, since the 200 * bootloader doesn't understand UDF. 201 */ 202 if (mp->mnt_flag & MNT_ROOTFS) 203 return (ENOTSUP); 204 205 fspec = NULL; 206 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 207 if (!error && fspec[len - 1] != '\0') 208 return (EINVAL); 209 210 if (mp->mnt_flag & MNT_UPDATE) { 211 return (0); 212 } 213 214 /* Check that the mount device exists */ 215 if (fspec == NULL) 216 return (EINVAL); 217 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec); 218 if ((error = namei(ndp))) 219 return (error); 220 NDFREE_PNBUF(ndp); 221 devvp = ndp->ni_vp; 222 223 if (!vn_isdisk_error(devvp, &error)) { 224 vput(devvp); 225 return (error); 226 } 227 228 /* Check the access rights on the mount device */ 229 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td); 230 if (error) 231 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 232 if (error) { 233 vput(devvp); 234 return (error); 235 } 236 237 if ((error = udf_mountfs(devvp, mp))) { 238 vrele(devvp); 239 return (error); 240 } 241 242 imp = VFSTOUDFFS(mp); 243 244 udf_flags = NULL; 245 error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len); 246 if (error || len != sizeof(int)) 247 return (EINVAL); 248 imp->im_flags = *udf_flags; 249 250 if (imp->im_flags & UDFMNT_KICONV && udf_iconv) { 251 cs_disk = NULL; 252 error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len); 253 if (!error && cs_disk[len - 1] != '\0') 254 return (EINVAL); 255 cs_local = NULL; 256 error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len); 257 if (!error && cs_local[len - 1] != '\0') 258 return (EINVAL); 259 udf_iconv->open(cs_local, cs_disk, &imp->im_d2l); 260 #if 0 261 udf_iconv->open(cs_disk, cs_local, &imp->im_l2d); 262 #endif 263 } 264 265 vfs_mountedfrom(mp, fspec); 266 return 0; 267 }; 268 269 /* 270 * Check the descriptor tag for both the correct id and correct checksum. 271 * Return zero if all is good, EINVAL if not. 272 */ 273 int 274 udf_checktag(struct desc_tag *tag, uint16_t id) 275 { 276 uint8_t *itag; 277 uint8_t i, cksum = 0; 278 279 itag = (uint8_t *)tag; 280 281 if (le16toh(tag->id) != id) 282 return (EINVAL); 283 284 for (i = 0; i < 16; i++) 285 cksum = cksum + itag[i]; 286 cksum = cksum - itag[4]; 287 288 if (cksum == tag->cksum) 289 return (0); 290 291 return (EINVAL); 292 } 293 294 static int 295 udf_mountfs(struct vnode *devvp, struct mount *mp) 296 { 297 struct buf *bp = NULL; 298 struct cdev *dev; 299 struct anchor_vdp avdp; 300 struct udf_mnt *udfmp = NULL; 301 struct part_desc *pd; 302 struct logvol_desc *lvd; 303 struct fileset_desc *fsd; 304 struct file_entry *root_fentry; 305 uint32_t sector, size, mvds_start, mvds_end; 306 uint32_t logical_secsize; 307 uint32_t fsd_offset = 0; 308 uint16_t part_num = 0, fsd_part = 0; 309 int error = EINVAL; 310 int logvol_found = 0, part_found = 0, fsd_found = 0; 311 int bsize; 312 struct g_consumer *cp; 313 struct bufobj *bo; 314 315 dev = devvp->v_rdev; 316 dev_ref(dev); 317 g_topology_lock(); 318 error = g_vfs_open(devvp, &cp, "udf", 0); 319 g_topology_unlock(); 320 VOP_UNLOCK(devvp); 321 if (error) 322 goto bail; 323 324 bo = &devvp->v_bufobj; 325 326 if (devvp->v_rdev->si_iosize_max != 0) 327 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 328 if (mp->mnt_iosize_max > maxphys) 329 mp->mnt_iosize_max = maxphys; 330 331 /* XXX: should be M_WAITOK */ 332 udfmp = malloc(sizeof(struct udf_mnt), M_UDFMOUNT, 333 M_NOWAIT | M_ZERO); 334 if (udfmp == NULL) { 335 printf("Cannot allocate UDF mount struct\n"); 336 error = ENOMEM; 337 goto bail; 338 } 339 340 mp->mnt_data = udfmp; 341 mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev); 342 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 343 MNT_ILOCK(mp); 344 mp->mnt_flag |= MNT_LOCAL; 345 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED; 346 MNT_IUNLOCK(mp); 347 udfmp->im_mountp = mp; 348 udfmp->im_dev = dev; 349 udfmp->im_devvp = devvp; 350 udfmp->im_d2l = NULL; 351 udfmp->im_cp = cp; 352 udfmp->im_bo = bo; 353 354 #if 0 355 udfmp->im_l2d = NULL; 356 #endif 357 /* 358 * The UDF specification defines a logical sectorsize of 2048 359 * for DVD media. 360 */ 361 logical_secsize = 2048; 362 363 if (((logical_secsize % cp->provider->sectorsize) != 0) || 364 (logical_secsize < cp->provider->sectorsize)) { 365 error = EINVAL; 366 goto bail; 367 } 368 369 bsize = cp->provider->sectorsize; 370 371 /* 372 * Get the Anchor Volume Descriptor Pointer from sector 256. 373 * XXX Should also check sector n - 256, n, and 512. 374 */ 375 sector = 256; 376 if ((error = bread(devvp, sector * btodb(logical_secsize), bsize, 377 NOCRED, &bp)) != 0) 378 goto bail; 379 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 380 goto bail; 381 382 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 383 brelse(bp); 384 bp = NULL; 385 386 /* 387 * Extract the Partition Descriptor and Logical Volume Descriptor 388 * from the Volume Descriptor Sequence. 389 * XXX Should we care about the partition type right now? 390 * XXX What about multiple partitions? 391 */ 392 mvds_start = le32toh(avdp.main_vds_ex.loc); 393 mvds_end = mvds_start + (le32toh(avdp.main_vds_ex.len) - 1) / bsize; 394 for (sector = mvds_start; sector < mvds_end; sector++) { 395 if ((error = bread(devvp, sector * btodb(logical_secsize), 396 bsize, NOCRED, &bp)) != 0) { 397 printf("Can't read sector %d of VDS\n", sector); 398 goto bail; 399 } 400 lvd = (struct logvol_desc *)bp->b_data; 401 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 402 udfmp->bsize = le32toh(lvd->lb_size); 403 if (udfmp->bsize < 0 || udfmp->bsize > maxbcachebuf) { 404 printf("lvd block size %d\n", udfmp->bsize); 405 error = EINVAL; 406 goto bail; 407 } 408 udfmp->bmask = udfmp->bsize - 1; 409 udfmp->bshift = ffs(udfmp->bsize) - 1; 410 fsd_part = le16toh(lvd->_lvd_use.fsd_loc.loc.part_num); 411 fsd_offset = le32toh(lvd->_lvd_use.fsd_loc.loc.lb_num); 412 if (udf_find_partmaps(udfmp, lvd)) 413 break; 414 logvol_found = 1; 415 } 416 pd = (struct part_desc *)bp->b_data; 417 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 418 part_found = 1; 419 part_num = le16toh(pd->part_num); 420 udfmp->part_len = le32toh(pd->part_len); 421 udfmp->part_start = le32toh(pd->start_loc); 422 } 423 424 brelse(bp); 425 bp = NULL; 426 if ((part_found) && (logvol_found)) 427 break; 428 } 429 430 if (!part_found || !logvol_found) { 431 error = EINVAL; 432 goto bail; 433 } 434 435 if (fsd_part != part_num) { 436 printf("FSD does not lie within the partition!\n"); 437 error = EINVAL; 438 goto bail; 439 } 440 441 /* 442 * Grab the Fileset Descriptor 443 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 444 * me in the right direction here. 445 */ 446 sector = udfmp->part_start + fsd_offset; 447 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 448 printf("Cannot read sector %d of FSD\n", sector); 449 goto bail; 450 } 451 fsd = (struct fileset_desc *)bp->b_data; 452 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 453 fsd_found = 1; 454 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 455 sizeof(struct long_ad)); 456 } 457 458 brelse(bp); 459 bp = NULL; 460 461 if (!fsd_found) { 462 printf("Couldn't find the fsd\n"); 463 error = EINVAL; 464 goto bail; 465 } 466 467 /* 468 * Find the file entry for the root directory. 469 */ 470 sector = le32toh(udfmp->root_icb.loc.lb_num) + udfmp->part_start; 471 size = le32toh(udfmp->root_icb.len); 472 if (size < UDF_FENTRY_SIZE) { 473 printf("Invalid root directory file entry length %u\n", 474 size); 475 goto bail; 476 } 477 if ((error = udf_readdevblks(udfmp, sector, size, &bp)) != 0) { 478 printf("Cannot read sector %d\n", sector); 479 goto bail; 480 } 481 482 root_fentry = (struct file_entry *)bp->b_data; 483 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 484 printf("Invalid root file entry!\n"); 485 goto bail; 486 } 487 488 brelse(bp); 489 bp = NULL; 490 491 return 0; 492 493 bail: 494 if (udfmp != NULL) 495 free(udfmp, M_UDFMOUNT); 496 if (bp != NULL) 497 brelse(bp); 498 if (cp != NULL) { 499 g_topology_lock(); 500 g_vfs_close(cp); 501 g_topology_unlock(); 502 } 503 dev_rel(dev); 504 return error; 505 }; 506 507 static int 508 udf_unmount(struct mount *mp, int mntflags) 509 { 510 struct udf_mnt *udfmp; 511 int error, flags = 0; 512 513 udfmp = VFSTOUDFFS(mp); 514 515 if (mntflags & MNT_FORCE) 516 flags |= FORCECLOSE; 517 518 if ((error = vflush(mp, 0, flags, curthread))) 519 return (error); 520 521 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 522 if (udfmp->im_d2l) 523 udf_iconv->close(udfmp->im_d2l); 524 #if 0 525 if (udfmp->im_l2d) 526 udf_iconv->close(udfmp->im_l2d); 527 #endif 528 } 529 530 g_topology_lock(); 531 g_vfs_close(udfmp->im_cp); 532 g_topology_unlock(); 533 vrele(udfmp->im_devvp); 534 dev_rel(udfmp->im_dev); 535 536 if (udfmp->s_table != NULL) 537 free(udfmp->s_table, M_UDFMOUNT); 538 539 free(udfmp, M_UDFMOUNT); 540 541 mp->mnt_data = NULL; 542 return (0); 543 } 544 545 static int 546 udf_root(struct mount *mp, int flags, struct vnode **vpp) 547 { 548 struct udf_mnt *udfmp; 549 ino_t id; 550 551 udfmp = VFSTOUDFFS(mp); 552 553 id = udf_getid(&udfmp->root_icb); 554 555 return (udf_vget(mp, id, flags, vpp)); 556 } 557 558 static int 559 udf_statfs(struct mount *mp, struct statfs *sbp) 560 { 561 struct udf_mnt *udfmp; 562 563 udfmp = VFSTOUDFFS(mp); 564 565 sbp->f_bsize = udfmp->bsize; 566 sbp->f_iosize = udfmp->bsize; 567 sbp->f_blocks = udfmp->part_len; 568 sbp->f_bfree = 0; 569 sbp->f_bavail = 0; 570 sbp->f_files = 0; 571 sbp->f_ffree = 0; 572 return 0; 573 } 574 575 int 576 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 577 { 578 struct buf *bp; 579 struct vnode *devvp; 580 struct udf_mnt *udfmp; 581 struct thread *td; 582 struct vnode *vp; 583 struct udf_node *unode; 584 struct file_entry *fe; 585 uint32_t lea, lad; 586 int error, sector, size; 587 588 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 589 if (error || *vpp != NULL) 590 return (error); 591 592 /* 593 * We must promote to an exclusive lock for vnode creation. This 594 * can happen if lookup is passed LOCKSHARED. 595 */ 596 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 597 flags &= ~LK_TYPE_MASK; 598 flags |= LK_EXCLUSIVE; 599 } 600 601 /* 602 * We do not lock vnode creation as it is believed to be too 603 * expensive for such rare case as simultaneous creation of vnode 604 * for same ino by different processes. We just allow them to race 605 * and check later to decide who wins. Let the race begin! 606 */ 607 608 td = curthread; 609 udfmp = VFSTOUDFFS(mp); 610 611 unode = uma_zalloc(udf_zone_node, M_WAITOK | M_ZERO); 612 613 if ((error = udf_allocv(mp, &vp, td))) { 614 printf("Error from udf_allocv\n"); 615 uma_zfree(udf_zone_node, unode); 616 return (error); 617 } 618 619 unode->i_vnode = vp; 620 unode->hash_id = ino; 621 unode->udfmp = udfmp; 622 vp->v_data = unode; 623 624 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 625 error = insmntque(vp, mp); 626 if (error != 0) { 627 uma_zfree(udf_zone_node, unode); 628 return (error); 629 } 630 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL); 631 if (error || *vpp != NULL) 632 return (error); 633 634 /* 635 * Copy in the file entry. Per the spec, the size can only be 1 block. 636 */ 637 sector = ino + udfmp->part_start; 638 devvp = udfmp->im_devvp; 639 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 640 printf("Cannot read sector %d\n", sector); 641 goto error; 642 } 643 644 /* 645 * File entry length validation. 646 */ 647 fe = (struct file_entry *)bp->b_data; 648 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 649 printf("Invalid file entry!\n"); 650 error = ENOMEM; 651 goto error; 652 } 653 lea = le32toh(fe->l_ea); 654 lad = le32toh(fe->l_ad); 655 if (lea > udfmp->bsize || lad > udfmp->bsize) { 656 printf("Invalid EA and AD lengths %u, %u\n", lea, lad); 657 error = EIO; 658 goto error; 659 } 660 size = UDF_FENTRY_SIZE + lea + lad; 661 if (size > udfmp->bsize) { 662 printf("Invalid file entry size %u\n", size); 663 error = EIO; 664 goto error; 665 } 666 667 unode->fentry = malloc(size, M_UDFFENTRY, M_NOWAIT | M_ZERO); 668 if (unode->fentry == NULL) { 669 printf("Cannot allocate file entry block\n"); 670 error = ENOMEM; 671 goto error; 672 } 673 674 bcopy(bp->b_data, unode->fentry, size); 675 676 brelse(bp); 677 bp = NULL; 678 679 switch (unode->fentry->icbtag.file_type) { 680 default: 681 vp->v_type = VBAD; 682 break; 683 case 4: 684 vp->v_type = VDIR; 685 break; 686 case 5: 687 vp->v_type = VREG; 688 break; 689 case 6: 690 vp->v_type = VBLK; 691 break; 692 case 7: 693 vp->v_type = VCHR; 694 break; 695 case 9: 696 vp->v_type = VFIFO; 697 vp->v_op = &udf_fifoops; 698 break; 699 case 10: 700 vp->v_type = VSOCK; 701 break; 702 case 12: 703 vp->v_type = VLNK; 704 break; 705 } 706 707 if (vp->v_type != VFIFO) 708 VN_LOCK_ASHARE(vp); 709 710 if (ino == udf_getid(&udfmp->root_icb)) 711 vp->v_vflag |= VV_ROOT; 712 713 vn_set_state(vp, VSTATE_CONSTRUCTED); 714 *vpp = vp; 715 716 return (0); 717 718 error: 719 vgone(vp); 720 vput(vp); 721 brelse(bp); 722 *vpp = NULL; 723 return (error); 724 } 725 726 static int 727 udf_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp) 728 { 729 struct ifid *ifhp; 730 struct vnode *nvp; 731 struct udf_node *np; 732 off_t fsize; 733 int error; 734 735 ifhp = (struct ifid *)fhp; 736 737 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 738 *vpp = NULLVP; 739 return (error); 740 } 741 742 np = VTON(nvp); 743 fsize = le64toh(np->fentry->inf_len); 744 745 *vpp = nvp; 746 vnode_create_vobject(*vpp, fsize, curthread); 747 return (0); 748 } 749 750 static int 751 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 752 { 753 struct part_map_spare *pms; 754 struct regid *pmap_id; 755 struct buf *bp; 756 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 757 int i, k, ptype, psize, error; 758 uint8_t *pmap = (uint8_t *) &lvd->maps[0]; 759 760 for (i = 0; i < le32toh(lvd->n_pm); i++) { 761 ptype = pmap[0]; 762 psize = pmap[1]; 763 if (((ptype != 1) && (ptype != 2)) || 764 ((psize != UDF_PMAP_TYPE1_SIZE) && 765 (psize != UDF_PMAP_TYPE2_SIZE))) { 766 printf("Invalid partition map found\n"); 767 return (1); 768 } 769 770 if (ptype == 1) { 771 /* Type 1 map. We don't care */ 772 pmap += UDF_PMAP_TYPE1_SIZE; 773 continue; 774 } 775 776 /* Type 2 map. Gotta find out the details */ 777 pmap_id = (struct regid *)&pmap[4]; 778 bzero(®id_id[0], UDF_REGID_ID_SIZE); 779 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 780 781 if (bcmp(®id_id[0], "*UDF Sparable Partition", 782 UDF_REGID_ID_SIZE)) { 783 printf("Unsupported partition map: %s\n", ®id_id[0]); 784 return (1); 785 } 786 787 pms = (struct part_map_spare *)pmap; 788 pmap += UDF_PMAP_TYPE2_SIZE; 789 udfmp->s_table = malloc(le32toh(pms->st_size), 790 M_UDFMOUNT, M_NOWAIT | M_ZERO); 791 if (udfmp->s_table == NULL) 792 return (ENOMEM); 793 794 /* Calculate the number of sectors per packet. */ 795 /* XXX Logical or physical? */ 796 udfmp->p_sectors = le16toh(pms->packet_len) / udfmp->bsize; 797 798 /* 799 * XXX If reading the first Sparing Table fails, should look 800 * for another table. 801 */ 802 if ((error = udf_readdevblks(udfmp, le32toh(pms->st_loc[0]), 803 le32toh(pms->st_size), &bp)) != 0) { 804 if (bp != NULL) 805 brelse(bp); 806 printf("Failed to read Sparing Table at sector %d\n", 807 le32toh(pms->st_loc[0])); 808 free(udfmp->s_table, M_UDFMOUNT); 809 return (error); 810 } 811 bcopy(bp->b_data, udfmp->s_table, le32toh(pms->st_size)); 812 brelse(bp); 813 814 if (udf_checktag(&udfmp->s_table->tag, 0)) { 815 printf("Invalid sparing table found\n"); 816 free(udfmp->s_table, M_UDFMOUNT); 817 return (EINVAL); 818 } 819 820 /* See how many valid entries there are here. The list is 821 * supposed to be sorted. 0xfffffff0 and higher are not valid 822 */ 823 for (k = 0; k < le16toh(udfmp->s_table->rt_l); k++) { 824 udfmp->s_table_entries = k; 825 if (le32toh(udfmp->s_table->entries[k].org) >= 826 0xfffffff0) 827 break; 828 } 829 } 830 831 return (0); 832 } 833