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; 120 121 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 /* 144 * This code used to pre-allocate a certain number of pages for each 145 * pool, reducing the need to grow the zones later on. UMA doesn't 146 * advertise any such functionality, unfortunately =-< 147 */ 148 udf_zone_trans = uma_zcreate("UDF translation buffer, zone", MAXNAMLEN * 149 sizeof(unicode_t), NULL, NULL, NULL, NULL, 0, 0); 150 151 udf_zone_node = uma_zcreate("UDF Node zone", sizeof(struct udf_node), 152 NULL, NULL, NULL, NULL, 0, 0); 153 154 udf_zone_ds = uma_zcreate("UDF Dirstream zone", 155 sizeof(struct udf_dirstream), NULL, NULL, NULL, NULL, 0, 0); 156 157 if ((udf_zone_node == NULL) || (udf_zone_trans == NULL) || 158 (udf_zone_ds == NULL)) { 159 printf("Cannot create allocation zones.\n"); 160 return (ENOMEM); 161 } 162 163 return 0; 164 } 165 166 static int 167 udf_uninit(struct vfsconf *foo) 168 { 169 170 if (udf_zone_trans != NULL) { 171 uma_zdestroy(udf_zone_trans); 172 udf_zone_trans = NULL; 173 } 174 175 if (udf_zone_node != NULL) { 176 uma_zdestroy(udf_zone_node); 177 udf_zone_node = NULL; 178 } 179 180 if (udf_zone_ds != NULL) { 181 uma_zdestroy(udf_zone_ds); 182 udf_zone_ds = NULL; 183 } 184 185 return (0); 186 } 187 188 static int 189 udf_mount(struct mount *mp, struct thread *td) 190 { 191 struct vnode *devvp; /* vnode of the mount device */ 192 struct udf_mnt *imp = 0; 193 struct vfsoptlist *opts; 194 char *fspec, *cs_disk, *cs_local; 195 int error, len, *udf_flags; 196 struct nameidata nd, *ndp = &nd; 197 198 opts = mp->mnt_optnew; 199 200 /* 201 * Unconditionally mount as read-only. 202 */ 203 MNT_ILOCK(mp); 204 mp->mnt_flag |= MNT_RDONLY; 205 MNT_IUNLOCK(mp); 206 207 /* 208 * No root filesystem support. Probably not a big deal, since the 209 * bootloader doesn't understand UDF. 210 */ 211 if (mp->mnt_flag & MNT_ROOTFS) 212 return (ENOTSUP); 213 214 fspec = NULL; 215 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 216 if (!error && fspec[len - 1] != '\0') 217 return (EINVAL); 218 219 if (mp->mnt_flag & MNT_UPDATE) { 220 return (0); 221 } 222 223 /* Check that the mount device exists */ 224 if (fspec == NULL) 225 return (EINVAL); 226 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 227 if ((error = namei(ndp))) 228 return (error); 229 NDFREE(ndp, NDF_ONLY_PNBUF); 230 devvp = ndp->ni_vp; 231 232 if (vn_isdisk(devvp, &error) == 0) { 233 vput(devvp); 234 return (error); 235 } 236 237 /* Check the access rights on the mount device */ 238 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td); 239 if (error) 240 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 241 if (error) { 242 vput(devvp); 243 return (error); 244 } 245 246 if ((error = udf_mountfs(devvp, mp))) { 247 vrele(devvp); 248 return (error); 249 } 250 251 imp = VFSTOUDFFS(mp); 252 253 udf_flags = NULL; 254 error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len); 255 if (error || len != sizeof(int)) 256 return (EINVAL); 257 imp->im_flags = *udf_flags; 258 259 if (imp->im_flags & UDFMNT_KICONV && udf_iconv) { 260 cs_disk = NULL; 261 error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len); 262 if (!error && cs_disk[len - 1] != '\0') 263 return (EINVAL); 264 cs_local = NULL; 265 error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len); 266 if (!error && cs_local[len - 1] != '\0') 267 return (EINVAL); 268 udf_iconv->open(cs_local, cs_disk, &imp->im_d2l); 269 #if 0 270 udf_iconv->open(cs_disk, cs_local, &imp->im_l2d); 271 #endif 272 } 273 274 vfs_mountedfrom(mp, fspec); 275 return 0; 276 }; 277 278 /* 279 * Check the descriptor tag for both the correct id and correct checksum. 280 * Return zero if all is good, EINVAL if not. 281 */ 282 int 283 udf_checktag(struct desc_tag *tag, uint16_t id) 284 { 285 uint8_t *itag; 286 uint8_t i, cksum = 0; 287 288 itag = (uint8_t *)tag; 289 290 if (le16toh(tag->id) != id) 291 return (EINVAL); 292 293 for (i = 0; i < 16; i++) 294 cksum = cksum + itag[i]; 295 cksum = cksum - itag[4]; 296 297 if (cksum == tag->cksum) 298 return (0); 299 300 return (EINVAL); 301 } 302 303 static int 304 udf_mountfs(struct vnode *devvp, struct mount *mp) 305 { 306 struct buf *bp = NULL; 307 struct cdev *dev; 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 dev = devvp->v_rdev; 325 dev_ref(dev); 326 DROP_GIANT(); 327 g_topology_lock(); 328 error = g_vfs_open(devvp, &cp, "udf", 0); 329 g_topology_unlock(); 330 PICKUP_GIANT(); 331 VOP_UNLOCK(devvp, 0); 332 if (error) 333 goto bail; 334 335 bo = &devvp->v_bufobj; 336 337 /* XXX: should be M_WAITOK */ 338 udfmp = malloc(sizeof(struct udf_mnt), M_UDFMOUNT, 339 M_NOWAIT | M_ZERO); 340 if (udfmp == NULL) { 341 printf("Cannot allocate UDF mount struct\n"); 342 error = ENOMEM; 343 goto bail; 344 } 345 346 mp->mnt_data = udfmp; 347 mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev); 348 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 349 MNT_ILOCK(mp); 350 mp->mnt_flag |= MNT_LOCAL; 351 mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED; 352 MNT_IUNLOCK(mp); 353 udfmp->im_mountp = mp; 354 udfmp->im_dev = dev; 355 udfmp->im_devvp = devvp; 356 udfmp->im_d2l = NULL; 357 udfmp->im_cp = cp; 358 udfmp->im_bo = bo; 359 360 #if 0 361 udfmp->im_l2d = NULL; 362 #endif 363 /* 364 * The UDF specification defines a logical sectorsize of 2048 365 * for DVD media. 366 */ 367 logical_secsize = 2048; 368 369 if (((logical_secsize % cp->provider->sectorsize) != 0) || 370 (logical_secsize < cp->provider->sectorsize)) { 371 error = EINVAL; 372 goto bail; 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 if (cp != NULL) { 496 DROP_GIANT(); 497 g_topology_lock(); 498 g_vfs_close(cp); 499 g_topology_unlock(); 500 PICKUP_GIANT(); 501 } 502 dev_rel(dev); 503 return error; 504 }; 505 506 static int 507 udf_unmount(struct mount *mp, int mntflags, struct thread *td) 508 { 509 struct udf_mnt *udfmp; 510 int error, flags = 0; 511 512 udfmp = VFSTOUDFFS(mp); 513 514 if (mntflags & MNT_FORCE) 515 flags |= FORCECLOSE; 516 517 if ((error = vflush(mp, 0, flags, td))) 518 return (error); 519 520 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 521 if (udfmp->im_d2l) 522 udf_iconv->close(udfmp->im_d2l); 523 #if 0 524 if (udfmp->im_l2d) 525 udf_iconv->close(udfmp->im_l2d); 526 #endif 527 } 528 529 DROP_GIANT(); 530 g_topology_lock(); 531 g_vfs_close(udfmp->im_cp); 532 g_topology_unlock(); 533 PICKUP_GIANT(); 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 MNT_ILOCK(mp); 544 mp->mnt_flag &= ~MNT_LOCAL; 545 MNT_IUNLOCK(mp); 546 547 return (0); 548 } 549 550 static int 551 udf_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td) 552 { 553 struct udf_mnt *udfmp; 554 ino_t id; 555 556 udfmp = VFSTOUDFFS(mp); 557 558 id = udf_getid(&udfmp->root_icb); 559 560 return (udf_vget(mp, id, flags, vpp)); 561 } 562 563 static int 564 udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 565 { 566 struct udf_mnt *udfmp; 567 568 udfmp = VFSTOUDFFS(mp); 569 570 sbp->f_bsize = udfmp->bsize; 571 sbp->f_iosize = udfmp->bsize; 572 sbp->f_blocks = udfmp->part_len; 573 sbp->f_bfree = 0; 574 sbp->f_bavail = 0; 575 sbp->f_files = 0; 576 sbp->f_ffree = 0; 577 return 0; 578 } 579 580 int 581 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 582 { 583 struct buf *bp; 584 struct vnode *devvp; 585 struct udf_mnt *udfmp; 586 struct thread *td; 587 struct vnode *vp; 588 struct udf_node *unode; 589 struct file_entry *fe; 590 int error, sector, size; 591 592 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 593 if (error || *vpp != NULL) 594 return (error); 595 596 /* 597 * We must promote to an exclusive lock for vnode creation. This 598 * can happen if lookup is passed LOCKSHARED. 599 */ 600 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 601 flags &= ~LK_TYPE_MASK; 602 flags |= LK_EXCLUSIVE; 603 } 604 605 /* 606 * We do not lock vnode creation as it is believed to be too 607 * expensive for such rare case as simultaneous creation of vnode 608 * for same ino by different processes. We just allow them to race 609 * and check later to decide who wins. Let the race begin! 610 */ 611 612 td = curthread; 613 udfmp = VFSTOUDFFS(mp); 614 615 unode = uma_zalloc(udf_zone_node, M_WAITOK | M_ZERO); 616 617 if ((error = udf_allocv(mp, &vp, td))) { 618 printf("Error from udf_allocv\n"); 619 uma_zfree(udf_zone_node, unode); 620 return (error); 621 } 622 623 unode->i_vnode = vp; 624 unode->hash_id = ino; 625 unode->udfmp = udfmp; 626 vp->v_data = unode; 627 628 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 629 error = insmntque(vp, mp); 630 if (error != 0) { 631 uma_zfree(udf_zone_node, unode); 632 return (error); 633 } 634 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL); 635 if (error || *vpp != NULL) 636 return (error); 637 638 /* 639 * Copy in the file entry. Per the spec, the size can only be 1 block. 640 */ 641 sector = ino + udfmp->part_start; 642 devvp = udfmp->im_devvp; 643 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 644 printf("Cannot read sector %d\n", sector); 645 vgone(vp); 646 vput(vp); 647 brelse(bp); 648 *vpp = NULL; 649 return (error); 650 } 651 652 fe = (struct file_entry *)bp->b_data; 653 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 654 printf("Invalid file entry!\n"); 655 vgone(vp); 656 vput(vp); 657 brelse(bp); 658 *vpp = NULL; 659 return (ENOMEM); 660 } 661 size = UDF_FENTRY_SIZE + le32toh(fe->l_ea) + le32toh(fe->l_ad); 662 unode->fentry = malloc(size, M_UDFFENTRY, M_NOWAIT | M_ZERO); 663 if (unode->fentry == NULL) { 664 printf("Cannot allocate file entry block\n"); 665 vgone(vp); 666 vput(vp); 667 brelse(bp); 668 *vpp = NULL; 669 return (ENOMEM); 670 } 671 672 bcopy(bp->b_data, unode->fentry, size); 673 674 brelse(bp); 675 bp = NULL; 676 677 switch (unode->fentry->icbtag.file_type) { 678 default: 679 vp->v_type = VBAD; 680 break; 681 case 4: 682 vp->v_type = VDIR; 683 break; 684 case 5: 685 vp->v_type = VREG; 686 break; 687 case 6: 688 vp->v_type = VBLK; 689 break; 690 case 7: 691 vp->v_type = VCHR; 692 break; 693 case 9: 694 vp->v_type = VFIFO; 695 vp->v_op = &udf_fifoops; 696 break; 697 case 10: 698 vp->v_type = VSOCK; 699 break; 700 case 12: 701 vp->v_type = VLNK; 702 break; 703 } 704 705 if (vp->v_type != VFIFO) 706 VN_LOCK_ASHARE(vp); 707 708 if (ino == udf_getid(&udfmp->root_icb)) 709 vp->v_vflag |= VV_ROOT; 710 711 *vpp = vp; 712 713 return (0); 714 } 715 716 static int 717 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 718 { 719 struct ifid *ifhp; 720 struct vnode *nvp; 721 struct udf_node *np; 722 off_t fsize; 723 int error; 724 725 ifhp = (struct ifid *)fhp; 726 727 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 728 *vpp = NULLVP; 729 return (error); 730 } 731 732 np = VTON(nvp); 733 fsize = le64toh(np->fentry->inf_len); 734 735 *vpp = nvp; 736 vnode_create_vobject(*vpp, fsize, curthread); 737 return (0); 738 } 739 740 static int 741 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 742 { 743 struct part_map_spare *pms; 744 struct regid *pmap_id; 745 struct buf *bp; 746 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 747 int i, k, ptype, psize, error; 748 uint8_t *pmap = (uint8_t *) &lvd->maps[0]; 749 750 for (i = 0; i < le32toh(lvd->n_pm); i++) { 751 ptype = pmap[0]; 752 psize = pmap[1]; 753 if (((ptype != 1) && (ptype != 2)) || 754 ((psize != UDF_PMAP_TYPE1_SIZE) && 755 (psize != UDF_PMAP_TYPE2_SIZE))) { 756 printf("Invalid partition map found\n"); 757 return (1); 758 } 759 760 if (ptype == 1) { 761 /* Type 1 map. We don't care */ 762 pmap += UDF_PMAP_TYPE1_SIZE; 763 continue; 764 } 765 766 /* Type 2 map. Gotta find out the details */ 767 pmap_id = (struct regid *)&pmap[4]; 768 bzero(®id_id[0], UDF_REGID_ID_SIZE); 769 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 770 771 if (bcmp(®id_id[0], "*UDF Sparable Partition", 772 UDF_REGID_ID_SIZE)) { 773 printf("Unsupported partition map: %s\n", ®id_id[0]); 774 return (1); 775 } 776 777 pms = (struct part_map_spare *)pmap; 778 pmap += UDF_PMAP_TYPE2_SIZE; 779 udfmp->s_table = malloc(le32toh(pms->st_size), 780 M_UDFMOUNT, M_NOWAIT | M_ZERO); 781 if (udfmp->s_table == NULL) 782 return (ENOMEM); 783 784 /* Calculate the number of sectors per packet. */ 785 /* XXX Logical or physical? */ 786 udfmp->p_sectors = le16toh(pms->packet_len) / udfmp->bsize; 787 788 /* 789 * XXX If reading the first Sparing Table fails, should look 790 * for another table. 791 */ 792 if ((error = udf_readlblks(udfmp, le32toh(pms->st_loc[0]), 793 le32toh(pms->st_size), &bp)) != 0) { 794 if (bp != NULL) 795 brelse(bp); 796 printf("Failed to read Sparing Table at sector %d\n", 797 le32toh(pms->st_loc[0])); 798 free(udfmp->s_table, M_UDFMOUNT); 799 return (error); 800 } 801 bcopy(bp->b_data, udfmp->s_table, le32toh(pms->st_size)); 802 brelse(bp); 803 804 if (udf_checktag(&udfmp->s_table->tag, 0)) { 805 printf("Invalid sparing table found\n"); 806 free(udfmp->s_table, M_UDFMOUNT); 807 return (EINVAL); 808 } 809 810 /* See how many valid entries there are here. The list is 811 * supposed to be sorted. 0xfffffff0 and higher are not valid 812 */ 813 for (k = 0; k < le16toh(udfmp->s_table->rt_l); k++) { 814 udfmp->s_table_entries = k; 815 if (le32toh(udfmp->s_table->entries[k].org) >= 816 0xfffffff0) 817 break; 818 } 819 } 820 821 return (0); 822 } 823