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 demonstrates 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/limits.h> 85 #include <sys/malloc.h> 86 #include <sys/mount.h> 87 #include <sys/namei.h> 88 #include <sys/priv.h> 89 #include <sys/proc.h> 90 #include <sys/queue.h> 91 #include <sys/vnode.h> 92 #include <sys/endian.h> 93 94 #include <geom/geom.h> 95 #include <geom/geom_vfs.h> 96 97 #include <vm/uma.h> 98 99 #include <fs/udf/ecma167-udf.h> 100 #include <fs/udf/osta.h> 101 #include <fs/udf/udf.h> 102 #include <fs/udf/udf_mount.h> 103 104 static MALLOC_DEFINE(M_UDFMOUNT, "udf_mount", "UDF mount structure"); 105 MALLOC_DEFINE(M_UDFFENTRY, "udf_fentry", "UDF file entry structure"); 106 107 struct iconv_functions *udf_iconv = NULL; 108 109 /* Zones */ 110 uma_zone_t udf_zone_trans = NULL; 111 uma_zone_t udf_zone_node = NULL; 112 uma_zone_t udf_zone_ds = NULL; 113 114 static vfs_init_t udf_init; 115 static vfs_uninit_t udf_uninit; 116 static vfs_mount_t udf_mount; 117 static vfs_root_t udf_root; 118 static vfs_statfs_t udf_statfs; 119 static vfs_unmount_t udf_unmount; 120 static vfs_fhtovp_t udf_fhtovp; 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 }; 134 VFS_SET(udf_vfsops, udf, VFCF_READONLY); 135 136 MODULE_VERSION(udf, 1); 137 138 static int udf_mountfs(struct vnode *, struct mount *); 139 140 static int 141 udf_init(struct vfsconf *foo) 142 { 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 udf_zone_ds = uma_zcreate("UDF Dirstream zone", 151 sizeof(struct udf_dirstream), NULL, NULL, NULL, NULL, 0, 0); 152 153 return 0; 154 } 155 156 static int 157 udf_uninit(struct vfsconf *foo) 158 { 159 160 if (udf_zone_trans != NULL) { 161 uma_zdestroy(udf_zone_trans); 162 udf_zone_trans = NULL; 163 } 164 165 if (udf_zone_node != NULL) { 166 uma_zdestroy(udf_zone_node); 167 udf_zone_node = NULL; 168 } 169 170 if (udf_zone_ds != NULL) { 171 uma_zdestroy(udf_zone_ds); 172 udf_zone_ds = NULL; 173 } 174 175 return (0); 176 } 177 178 static int 179 udf_mount(struct mount *mp) 180 { 181 struct vnode *devvp; /* vnode of the mount device */ 182 struct thread *td; 183 struct udf_mnt *imp = NULL; 184 struct vfsoptlist *opts; 185 char *fspec, *cs_disk, *cs_local; 186 int error, len, *udf_flags; 187 struct nameidata nd, *ndp = &nd; 188 189 td = curthread; 190 opts = mp->mnt_optnew; 191 192 /* 193 * Unconditionally mount as read-only. 194 */ 195 MNT_ILOCK(mp); 196 mp->mnt_flag |= MNT_RDONLY; 197 MNT_IUNLOCK(mp); 198 199 /* 200 * No root filesystem support. Probably not a big deal, since the 201 * bootloader doesn't understand UDF. 202 */ 203 if (mp->mnt_flag & MNT_ROOTFS) 204 return (ENOTSUP); 205 206 fspec = NULL; 207 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 208 if (!error && fspec[len - 1] != '\0') 209 return (EINVAL); 210 211 if (mp->mnt_flag & MNT_UPDATE) { 212 return (0); 213 } 214 215 /* Check that the mount device exists */ 216 if (fspec == NULL) 217 return (EINVAL); 218 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec); 219 if ((error = namei(ndp))) 220 return (error); 221 NDFREE_PNBUF(ndp); 222 devvp = ndp->ni_vp; 223 224 if (!vn_isdisk_error(devvp, &error)) { 225 vput(devvp); 226 return (error); 227 } 228 229 /* Check the access rights on the mount device */ 230 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td); 231 if (error) 232 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 233 if (error) { 234 vput(devvp); 235 return (error); 236 } 237 238 if ((error = udf_mountfs(devvp, mp))) { 239 vrele(devvp); 240 return (error); 241 } 242 243 imp = VFSTOUDFFS(mp); 244 245 udf_flags = NULL; 246 error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len); 247 if (error || len != sizeof(int)) 248 return (EINVAL); 249 imp->im_flags = *udf_flags; 250 251 if (imp->im_flags & UDFMNT_KICONV && udf_iconv) { 252 cs_disk = NULL; 253 error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len); 254 if (!error && cs_disk[len - 1] != '\0') 255 return (EINVAL); 256 cs_local = NULL; 257 error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len); 258 if (!error && cs_local[len - 1] != '\0') 259 return (EINVAL); 260 udf_iconv->open(cs_local, cs_disk, &imp->im_d2l); 261 #if 0 262 udf_iconv->open(cs_disk, cs_local, &imp->im_l2d); 263 #endif 264 } 265 266 vfs_mountedfrom(mp, fspec); 267 return 0; 268 }; 269 270 /* 271 * Check the descriptor tag for both the correct id and correct checksum. 272 * Return zero if all is good, EINVAL if not. 273 */ 274 int 275 udf_checktag(struct desc_tag *tag, uint16_t id) 276 { 277 uint8_t *itag; 278 uint8_t i, cksum = 0; 279 280 itag = (uint8_t *)tag; 281 282 if (le16toh(tag->id) != id) 283 return (EINVAL); 284 285 for (i = 0; i < 16; i++) 286 cksum = cksum + itag[i]; 287 cksum = cksum - itag[4]; 288 289 if (cksum == tag->cksum) 290 return (0); 291 292 return (EINVAL); 293 } 294 295 static int 296 udf_mountfs(struct vnode *devvp, struct mount *mp) 297 { 298 struct buf *bp = NULL; 299 struct cdev *dev; 300 struct anchor_vdp avdp; 301 struct udf_mnt *udfmp = NULL; 302 struct part_desc *pd; 303 struct logvol_desc *lvd; 304 struct fileset_desc *fsd; 305 struct file_entry *root_fentry; 306 uint32_t sector, size, mvds_start, mvds_end; 307 uint32_t logical_secsize; 308 uint32_t fsd_offset = 0; 309 uint16_t part_num = 0, fsd_part = 0; 310 int error = EINVAL; 311 int logvol_found = 0, part_found = 0, fsd_found = 0; 312 int bsize; 313 struct g_consumer *cp; 314 struct bufobj *bo; 315 316 dev = devvp->v_rdev; 317 dev_ref(dev); 318 g_topology_lock(); 319 error = g_vfs_open(devvp, &cp, "udf", 0); 320 g_topology_unlock(); 321 VOP_UNLOCK(devvp); 322 if (error) 323 goto bail; 324 325 bo = &devvp->v_bufobj; 326 327 if (devvp->v_rdev->si_iosize_max != 0) 328 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 329 if (mp->mnt_iosize_max > maxphys) 330 mp->mnt_iosize_max = maxphys; 331 332 /* XXX: should be M_WAITOK */ 333 udfmp = malloc(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 = 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 MNT_ILOCK(mp); 345 mp->mnt_flag |= MNT_LOCAL; 346 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED; 347 MNT_IUNLOCK(mp); 348 udfmp->im_mountp = mp; 349 udfmp->im_dev = dev; 350 udfmp->im_devvp = devvp; 351 udfmp->im_d2l = NULL; 352 udfmp->im_cp = cp; 353 udfmp->im_bo = bo; 354 355 #if 0 356 udfmp->im_l2d = NULL; 357 #endif 358 /* 359 * The UDF specification defines a logical sectorsize of 2048 360 * for DVD media. 361 */ 362 logical_secsize = 2048; 363 364 if (((logical_secsize % cp->provider->sectorsize) != 0) || 365 (logical_secsize < cp->provider->sectorsize)) { 366 error = EINVAL; 367 goto bail; 368 } 369 370 bsize = cp->provider->sectorsize; 371 372 /* 373 * Get the Anchor Volume Descriptor Pointer from sector 256. 374 * XXX Should also check sector n - 256, n, and 512. 375 */ 376 sector = 256; 377 if ((error = bread(devvp, sector * btodb(logical_secsize), bsize, 378 NOCRED, &bp)) != 0) 379 goto bail; 380 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 381 goto bail; 382 383 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 384 brelse(bp); 385 bp = NULL; 386 387 /* 388 * Extract the Partition Descriptor and Logical Volume Descriptor 389 * from the Volume Descriptor Sequence. 390 * XXX Should we care about the partition type right now? 391 * XXX What about multiple partitions? 392 */ 393 mvds_start = le32toh(avdp.main_vds_ex.loc); 394 mvds_end = mvds_start + (le32toh(avdp.main_vds_ex.len) - 1) / bsize; 395 for (sector = mvds_start; sector < mvds_end; sector++) { 396 if ((error = bread(devvp, sector * btodb(logical_secsize), 397 bsize, NOCRED, &bp)) != 0) { 398 printf("Can't read sector %d of VDS\n", sector); 399 goto bail; 400 } 401 lvd = (struct logvol_desc *)bp->b_data; 402 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 403 udfmp->bsize = le32toh(lvd->lb_size); 404 if (udfmp->bsize < 0 || udfmp->bsize > maxbcachebuf) { 405 printf("lvd block size %d\n", udfmp->bsize); 406 error = EINVAL; 407 goto bail; 408 } 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 * Grab the Fileset Descriptor 444 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 445 * me in the right direction here. 446 */ 447 sector = udfmp->part_start + fsd_offset; 448 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 449 printf("Cannot read sector %d of FSD\n", sector); 450 goto bail; 451 } 452 fsd = (struct fileset_desc *)bp->b_data; 453 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 454 fsd_found = 1; 455 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 456 sizeof(struct long_ad)); 457 } 458 459 brelse(bp); 460 bp = NULL; 461 462 if (!fsd_found) { 463 printf("Couldn't find the fsd\n"); 464 error = EINVAL; 465 goto bail; 466 } 467 468 /* 469 * Find the file entry for the root directory. 470 */ 471 sector = le32toh(udfmp->root_icb.loc.lb_num) + udfmp->part_start; 472 size = le32toh(udfmp->root_icb.len); 473 if (size < UDF_FENTRY_SIZE) { 474 printf("Invalid root directory file entry length %u\n", 475 size); 476 goto bail; 477 } 478 if ((error = udf_readdevblks(udfmp, sector, size, &bp)) != 0) { 479 printf("Cannot read sector %d\n", sector); 480 goto bail; 481 } 482 483 root_fentry = (struct file_entry *)bp->b_data; 484 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 485 printf("Invalid root file entry!\n"); 486 goto bail; 487 } 488 489 brelse(bp); 490 bp = NULL; 491 492 return 0; 493 494 bail: 495 if (udfmp != NULL) 496 free(udfmp, M_UDFMOUNT); 497 if (bp != NULL) 498 brelse(bp); 499 if (cp != NULL) { 500 g_topology_lock(); 501 g_vfs_close(cp); 502 g_topology_unlock(); 503 } 504 dev_rel(dev); 505 return error; 506 }; 507 508 static int 509 udf_unmount(struct mount *mp, int mntflags) 510 { 511 struct udf_mnt *udfmp; 512 int error, flags = 0; 513 514 udfmp = VFSTOUDFFS(mp); 515 516 if (mntflags & MNT_FORCE) 517 flags |= FORCECLOSE; 518 519 if ((error = vflush(mp, 0, flags, curthread))) 520 return (error); 521 522 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 523 if (udfmp->im_d2l) 524 udf_iconv->close(udfmp->im_d2l); 525 #if 0 526 if (udfmp->im_l2d) 527 udf_iconv->close(udfmp->im_l2d); 528 #endif 529 } 530 531 g_topology_lock(); 532 g_vfs_close(udfmp->im_cp); 533 g_topology_unlock(); 534 vrele(udfmp->im_devvp); 535 dev_rel(udfmp->im_dev); 536 537 if (udfmp->s_table != NULL) 538 free(udfmp->s_table, M_UDFMOUNT); 539 540 free(udfmp, M_UDFMOUNT); 541 542 mp->mnt_data = NULL; 543 return (0); 544 } 545 546 static int 547 udf_root(struct mount *mp, int flags, struct vnode **vpp) 548 { 549 struct udf_mnt *udfmp; 550 ino_t id; 551 552 udfmp = VFSTOUDFFS(mp); 553 554 id = udf_getid(&udfmp->root_icb); 555 556 return (udf_vget(mp, id, flags, vpp)); 557 } 558 559 static int 560 udf_statfs(struct mount *mp, struct statfs *sbp) 561 { 562 struct udf_mnt *udfmp; 563 564 udfmp = VFSTOUDFFS(mp); 565 566 sbp->f_bsize = udfmp->bsize; 567 sbp->f_iosize = udfmp->bsize; 568 sbp->f_blocks = udfmp->part_len; 569 sbp->f_bfree = 0; 570 sbp->f_bavail = 0; 571 sbp->f_files = 0; 572 sbp->f_ffree = 0; 573 return 0; 574 } 575 576 int 577 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 578 { 579 struct buf *bp; 580 struct vnode *devvp; 581 struct udf_mnt *udfmp; 582 struct thread *td; 583 struct vnode *vp; 584 struct udf_node *unode; 585 struct file_entry *fe; 586 uint32_t lea, lad; 587 int error, sector, size; 588 589 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 590 if (error || *vpp != NULL) 591 return (error); 592 593 /* 594 * We must promote to an exclusive lock for vnode creation. This 595 * can happen if lookup is passed LOCKSHARED. 596 */ 597 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 598 flags &= ~LK_TYPE_MASK; 599 flags |= LK_EXCLUSIVE; 600 } 601 602 /* 603 * We do not lock vnode creation as it is believed to be too 604 * expensive for such rare case as simultaneous creation of vnode 605 * for same ino by different processes. We just allow them to race 606 * and check later to decide who wins. Let the race begin! 607 */ 608 609 td = curthread; 610 udfmp = VFSTOUDFFS(mp); 611 612 unode = uma_zalloc(udf_zone_node, M_WAITOK | M_ZERO); 613 614 if ((error = udf_allocv(mp, &vp, td))) { 615 printf("Error from udf_allocv\n"); 616 uma_zfree(udf_zone_node, unode); 617 return (error); 618 } 619 620 unode->i_vnode = vp; 621 unode->hash_id = ino; 622 unode->udfmp = udfmp; 623 vp->v_data = unode; 624 625 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 626 error = insmntque(vp, mp); 627 if (error != 0) { 628 uma_zfree(udf_zone_node, unode); 629 return (error); 630 } 631 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL); 632 if (error || *vpp != NULL) 633 return (error); 634 635 /* 636 * Copy in the file entry. Per the spec, the size can only be 1 block. 637 */ 638 sector = ino + udfmp->part_start; 639 devvp = udfmp->im_devvp; 640 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 641 printf("Cannot read sector %d\n", sector); 642 goto error; 643 } 644 645 /* 646 * File entry length validation. 647 */ 648 fe = (struct file_entry *)bp->b_data; 649 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 650 printf("Invalid file entry!\n"); 651 error = ENOMEM; 652 goto error; 653 } 654 lea = le32toh(fe->l_ea); 655 lad = le32toh(fe->l_ad); 656 if (lea > udfmp->bsize || lad > udfmp->bsize) { 657 printf("Invalid EA and AD lengths %u, %u\n", lea, lad); 658 error = EIO; 659 goto error; 660 } 661 size = UDF_FENTRY_SIZE + lea + lad; 662 if (size > udfmp->bsize) { 663 printf("Invalid file entry size %u\n", size); 664 error = EIO; 665 goto error; 666 } 667 668 unode->fentry = malloc(size, M_UDFFENTRY, M_NOWAIT | M_ZERO); 669 if (unode->fentry == NULL) { 670 printf("Cannot allocate file entry block\n"); 671 error = ENOMEM; 672 goto error; 673 } 674 675 bcopy(bp->b_data, unode->fentry, size); 676 677 brelse(bp); 678 bp = NULL; 679 680 switch (unode->fentry->icbtag.file_type) { 681 default: 682 vp->v_type = VBAD; 683 break; 684 case 4: 685 vp->v_type = VDIR; 686 break; 687 case 5: 688 vp->v_type = VREG; 689 break; 690 case 6: 691 vp->v_type = VBLK; 692 break; 693 case 7: 694 vp->v_type = VCHR; 695 break; 696 case 9: 697 vp->v_type = VFIFO; 698 vp->v_op = &udf_fifoops; 699 break; 700 case 10: 701 vp->v_type = VSOCK; 702 break; 703 case 12: 704 vp->v_type = VLNK; 705 break; 706 } 707 708 if (vp->v_type != VFIFO) 709 VN_LOCK_ASHARE(vp); 710 711 if (ino == udf_getid(&udfmp->root_icb)) 712 vp->v_vflag |= VV_ROOT; 713 714 vn_set_state(vp, VSTATE_CONSTRUCTED); 715 *vpp = vp; 716 717 return (0); 718 719 error: 720 vgone(vp); 721 vput(vp); 722 brelse(bp); 723 *vpp = NULL; 724 return (error); 725 } 726 727 static int 728 udf_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp) 729 { 730 struct ifid *ifhp; 731 struct vnode *nvp; 732 struct udf_node *np; 733 uint64_t fsize; 734 int error; 735 736 ifhp = (struct ifid *)fhp; 737 738 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 739 *vpp = NULLVP; 740 return (error); 741 } 742 743 np = VTON(nvp); 744 fsize = le64toh(np->fentry->inf_len); 745 if (fsize > OFF_MAX) { 746 *vpp = NULLVP; 747 return (EIO); 748 } 749 750 *vpp = nvp; 751 vnode_create_vobject(*vpp, fsize, curthread); 752 return (0); 753 } 754 755 static int 756 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 757 { 758 struct part_map_spare *pms; 759 struct regid *pmap_id; 760 struct buf *bp; 761 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 762 int i, k, ptype, psize, error; 763 uint8_t *pmap = (uint8_t *) &lvd->maps[0]; 764 765 for (i = 0; i < le32toh(lvd->n_pm); i++) { 766 ptype = pmap[0]; 767 psize = pmap[1]; 768 if (((ptype != 1) && (ptype != 2)) || 769 ((psize != UDF_PMAP_TYPE1_SIZE) && 770 (psize != UDF_PMAP_TYPE2_SIZE))) { 771 printf("Invalid partition map found\n"); 772 return (1); 773 } 774 775 if (ptype == 1) { 776 /* Type 1 map. We don't care */ 777 pmap += UDF_PMAP_TYPE1_SIZE; 778 continue; 779 } 780 781 /* Type 2 map. Gotta find out the details */ 782 pmap_id = (struct regid *)&pmap[4]; 783 bzero(®id_id[0], UDF_REGID_ID_SIZE); 784 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 785 786 if (bcmp(®id_id[0], "*UDF Sparable Partition", 787 UDF_REGID_ID_SIZE)) { 788 printf("Unsupported partition map: %s\n", ®id_id[0]); 789 return (1); 790 } 791 792 pms = (struct part_map_spare *)pmap; 793 pmap += UDF_PMAP_TYPE2_SIZE; 794 udfmp->s_table = malloc(le32toh(pms->st_size), 795 M_UDFMOUNT, M_NOWAIT | M_ZERO); 796 if (udfmp->s_table == NULL) 797 return (ENOMEM); 798 799 /* Calculate the number of sectors per packet. */ 800 /* XXX Logical or physical? */ 801 udfmp->p_sectors = le16toh(pms->packet_len) / udfmp->bsize; 802 803 /* 804 * XXX If reading the first Sparing Table fails, should look 805 * for another table. 806 */ 807 if ((error = udf_readdevblks(udfmp, le32toh(pms->st_loc[0]), 808 le32toh(pms->st_size), &bp)) != 0) { 809 if (bp != NULL) 810 brelse(bp); 811 printf("Failed to read Sparing Table at sector %d\n", 812 le32toh(pms->st_loc[0])); 813 free(udfmp->s_table, M_UDFMOUNT); 814 return (error); 815 } 816 bcopy(bp->b_data, udfmp->s_table, le32toh(pms->st_size)); 817 brelse(bp); 818 819 if (udf_checktag(&udfmp->s_table->tag, 0)) { 820 printf("Invalid sparing table found\n"); 821 free(udfmp->s_table, M_UDFMOUNT); 822 return (EINVAL); 823 } 824 825 /* See how many valid entries there are here. The list is 826 * supposed to be sorted. 0xfffffff0 and higher are not valid 827 */ 828 for (k = 0; k < le16toh(udfmp->s_table->rt_l); k++) { 829 udfmp->s_table_entries = k; 830 if (le32toh(udfmp->s_table->entries[k].org) >= 831 0xfffffff0) 832 break; 833 } 834 } 835 836 return (0); 837 } 838