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 export_args *export; 195 struct vfsoptlist *opts; 196 char *fspec, *cs_disk, *cs_local; 197 int error, len, *udf_flags; 198 struct nameidata nd, *ndp = &nd; 199 200 opts = mp->mnt_optnew; 201 202 if ((mp->mnt_flag & MNT_RDONLY) == 0) 203 return (EROFS); 204 205 /* 206 * No root filesystem support. Probably not a big deal, since the 207 * bootloader doesn't understand UDF. 208 */ 209 if (mp->mnt_flag & MNT_ROOTFS) 210 return (ENOTSUP); 211 212 fspec = NULL; 213 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 214 if (!error && fspec[len - 1] != '\0') 215 return (EINVAL); 216 217 if (mp->mnt_flag & MNT_UPDATE) { 218 imp = VFSTOUDFFS(mp); 219 if (fspec == NULL) { 220 error = vfs_getopt(opts, "export", (void **)&export, 221 &len); 222 if (error || len != sizeof(struct export_args)) 223 return (EINVAL); 224 return (vfs_export(mp, export)); 225 } 226 } 227 228 /* Check that the mount device exists */ 229 if (fspec == NULL) 230 return (EINVAL); 231 NDINIT(ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 232 if ((error = namei(ndp))) 233 return (error); 234 NDFREE(ndp, NDF_ONLY_PNBUF); 235 devvp = ndp->ni_vp; 236 237 if (vn_isdisk(devvp, &error) == 0) { 238 vrele(devvp); 239 return (error); 240 } 241 242 /* Check the access rights on the mount device */ 243 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 244 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td); 245 if (error) 246 error = suser(td); 247 if (error) { 248 vput(devvp); 249 return (error); 250 } 251 VOP_UNLOCK(devvp, 0, td); 252 253 if ((error = udf_mountfs(devvp, mp, td))) { 254 vrele(devvp); 255 return (error); 256 } 257 258 imp = VFSTOUDFFS(mp); 259 260 udf_flags = NULL; 261 error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len); 262 if (error || len != sizeof(int)) 263 return (EINVAL); 264 imp->im_flags = *udf_flags; 265 266 if (imp->im_flags & UDFMNT_KICONV && udf_iconv) { 267 cs_disk = NULL; 268 error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len); 269 if (!error && cs_disk[len - 1] != '\0') 270 return (EINVAL); 271 cs_local = NULL; 272 error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len); 273 if (!error && cs_local[len - 1] != '\0') 274 return (EINVAL); 275 udf_iconv->open(cs_local, cs_disk, &imp->im_d2l); 276 #if 0 277 udf_iconv->open(cs_disk, cs_local, &imp->im_l2d); 278 #endif 279 } 280 281 vfs_mountedfrom(mp, fspec); 282 return 0; 283 }; 284 285 /* 286 * Check the descriptor tag for both the correct id and correct checksum. 287 * Return zero if all is good, EINVAL if not. 288 */ 289 int 290 udf_checktag(struct desc_tag *tag, uint16_t id) 291 { 292 uint8_t *itag; 293 uint8_t i, cksum = 0; 294 295 itag = (uint8_t *)tag; 296 297 if (tag->id != id) 298 return (EINVAL); 299 300 for (i = 0; i < 15; i++) 301 cksum = cksum + itag[i]; 302 cksum = cksum - itag[4]; 303 304 if (cksum == tag->cksum) 305 return (0); 306 307 return (EINVAL); 308 } 309 310 static int 311 udf_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td) { 312 struct buf *bp = NULL; 313 struct anchor_vdp avdp; 314 struct udf_mnt *udfmp = NULL; 315 struct part_desc *pd; 316 struct logvol_desc *lvd; 317 struct fileset_desc *fsd; 318 struct file_entry *root_fentry; 319 uint32_t sector, size, mvds_start, mvds_end; 320 uint32_t fsd_offset = 0; 321 uint16_t part_num = 0, fsd_part = 0; 322 int error = EINVAL; 323 int logvol_found = 0, part_found = 0, fsd_found = 0; 324 int bsize; 325 struct g_consumer *cp; 326 struct bufobj *bo; 327 328 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 329 DROP_GIANT(); 330 g_topology_lock(); 331 error = g_vfs_open(devvp, &cp, "udf", 0); 332 g_topology_unlock(); 333 PICKUP_GIANT(); 334 VOP_UNLOCK(devvp, 0, td); 335 if (error) 336 return error; 337 338 bo = &devvp->v_bufobj; 339 340 /* XXX: should be M_WAITOK */ 341 MALLOC(udfmp, struct udf_mnt *, sizeof(struct udf_mnt), M_UDFMOUNT, 342 M_NOWAIT | M_ZERO); 343 if (udfmp == NULL) { 344 printf("Cannot allocate UDF mount struct\n"); 345 error = ENOMEM; 346 goto bail; 347 } 348 349 mp->mnt_data = (qaddr_t)udfmp; 350 mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev); 351 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 352 mp->mnt_flag |= MNT_LOCAL; 353 udfmp->im_mountp = mp; 354 udfmp->im_dev = devvp->v_rdev; 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 bsize = 2048; /* XXX Should probe the media for it's size */ 365 366 /* 367 * Get the Anchor Volume Descriptor Pointer from sector 256. 368 * XXX Should also check sector n - 256, n, and 512. 369 */ 370 sector = 256; 371 if ((error = bread(devvp, sector * btodb(bsize), bsize, NOCRED, 372 &bp)) != 0) 373 goto bail; 374 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 375 goto bail; 376 377 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 378 brelse(bp); 379 bp = NULL; 380 381 /* 382 * Extract the Partition Descriptor and Logical Volume Descriptor 383 * from the Volume Descriptor Sequence. 384 * XXX Should we care about the partition type right now? 385 * XXX What about multiple partitions? 386 */ 387 mvds_start = le32toh(avdp.main_vds_ex.loc); 388 mvds_end = mvds_start + (le32toh(avdp.main_vds_ex.len) - 1) / bsize; 389 for (sector = mvds_start; sector < mvds_end; sector++) { 390 if ((error = bread(devvp, sector * btodb(bsize), bsize, 391 NOCRED, &bp)) != 0) { 392 printf("Can't read sector %d of VDS\n", sector); 393 goto bail; 394 } 395 lvd = (struct logvol_desc *)bp->b_data; 396 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 397 udfmp->bsize = le32toh(lvd->lb_size); 398 udfmp->bmask = udfmp->bsize - 1; 399 udfmp->bshift = ffs(udfmp->bsize) - 1; 400 fsd_part = le16toh(lvd->_lvd_use.fsd_loc.loc.part_num); 401 fsd_offset = le32toh(lvd->_lvd_use.fsd_loc.loc.lb_num); 402 if (udf_find_partmaps(udfmp, lvd)) 403 break; 404 logvol_found = 1; 405 } 406 pd = (struct part_desc *)bp->b_data; 407 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 408 part_found = 1; 409 part_num = le16toh(pd->part_num); 410 udfmp->part_len = le32toh(pd->part_len); 411 udfmp->part_start = le32toh(pd->start_loc); 412 } 413 414 brelse(bp); 415 bp = NULL; 416 if ((part_found) && (logvol_found)) 417 break; 418 } 419 420 if (!part_found || !logvol_found) { 421 error = EINVAL; 422 goto bail; 423 } 424 425 if (fsd_part != part_num) { 426 printf("FSD does not lie within the partition!\n"); 427 error = EINVAL; 428 goto bail; 429 } 430 431 432 /* 433 * Grab the Fileset Descriptor 434 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 435 * me in the right direction here. 436 */ 437 sector = udfmp->part_start + fsd_offset; 438 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 439 printf("Cannot read sector %d of FSD\n", sector); 440 goto bail; 441 } 442 fsd = (struct fileset_desc *)bp->b_data; 443 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 444 fsd_found = 1; 445 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 446 sizeof(struct long_ad)); 447 } 448 449 brelse(bp); 450 bp = NULL; 451 452 if (!fsd_found) { 453 printf("Couldn't find the fsd\n"); 454 error = EINVAL; 455 goto bail; 456 } 457 458 /* 459 * Find the file entry for the root directory. 460 */ 461 sector = le32toh(udfmp->root_icb.loc.lb_num) + udfmp->part_start; 462 size = le32toh(udfmp->root_icb.len); 463 if ((error = udf_readlblks(udfmp, sector, size, &bp)) != 0) { 464 printf("Cannot read sector %d\n", sector); 465 goto bail; 466 } 467 468 root_fentry = (struct file_entry *)bp->b_data; 469 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 470 printf("Invalid root file entry!\n"); 471 goto bail; 472 } 473 474 brelse(bp); 475 bp = NULL; 476 477 mtx_init(&udfmp->hash_mtx, "udf_hash", NULL, MTX_DEF); 478 udfmp->hashtbl = phashinit(UDF_HASHTBLSIZE, M_UDFMOUNT, &udfmp->hashsz); 479 480 return 0; 481 482 bail: 483 if (udfmp != NULL) 484 FREE(udfmp, M_UDFMOUNT); 485 if (bp != NULL) 486 brelse(bp); 487 DROP_GIANT(); 488 g_topology_lock(); 489 g_vfs_close(cp, td); 490 g_topology_unlock(); 491 PICKUP_GIANT(); 492 return error; 493 }; 494 495 static int 496 udf_unmount(struct mount *mp, int mntflags, struct thread *td) 497 { 498 struct udf_mnt *udfmp; 499 int error, flags = 0; 500 501 udfmp = VFSTOUDFFS(mp); 502 503 if (mntflags & MNT_FORCE) 504 flags |= FORCECLOSE; 505 506 if ((error = vflush(mp, 0, flags, td))) 507 return (error); 508 509 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 510 if (udfmp->im_d2l) 511 udf_iconv->close(udfmp->im_d2l); 512 #if 0 513 if (udfmp->im_l2d) 514 udf_iconv->close(udfmp->im_l2d); 515 #endif 516 } 517 518 g_vfs_close(udfmp->im_cp, td); 519 vrele(udfmp->im_devvp); 520 521 if (udfmp->s_table != NULL) 522 FREE(udfmp->s_table, M_UDFMOUNT); 523 524 if (udfmp->hashtbl != NULL) 525 FREE(udfmp->hashtbl, M_UDFMOUNT); 526 527 FREE(udfmp, M_UDFMOUNT); 528 529 mp->mnt_data = (qaddr_t)0; 530 mp->mnt_flag &= ~MNT_LOCAL; 531 532 return (0); 533 } 534 535 static int 536 udf_root(struct mount *mp, struct vnode **vpp, struct thread *td) 537 { 538 struct udf_mnt *udfmp; 539 struct vnode *vp; 540 ino_t id; 541 int error; 542 543 udfmp = VFSTOUDFFS(mp); 544 545 id = udf_getid(&udfmp->root_icb); 546 547 error = udf_vget(mp, id, LK_EXCLUSIVE, vpp); 548 if (error) 549 return error; 550 551 vp = *vpp; 552 vp->v_vflag |= VV_ROOT; 553 udfmp->root_vp = vp; 554 555 return (0); 556 } 557 558 static int 559 udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 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 int error, sector, size; 586 587 td = curthread; 588 udfmp = VFSTOUDFFS(mp); 589 590 /* See if we already have this in the cache */ 591 if ((error = udf_hashlookup(udfmp, ino, flags, vpp)) != 0) 592 return (error); 593 if (*vpp != NULL) { 594 return (0); 595 } 596 597 /* 598 * Allocate memory and check the tag id's before grabbing a new 599 * vnode, since it's hard to roll back if there is a problem. 600 */ 601 unode = uma_zalloc(udf_zone_node, M_WAITOK); 602 if (unode == NULL) { 603 printf("Cannot allocate udf node\n"); 604 return (ENOMEM); 605 } 606 607 /* 608 * Copy in the file entry. Per the spec, the size can only be 1 block. 609 */ 610 sector = ino + udfmp->part_start; 611 devvp = udfmp->im_devvp; 612 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 613 printf("Cannot read sector %d\n", sector); 614 uma_zfree(udf_zone_node, unode); 615 return (error); 616 } 617 618 fe = (struct file_entry *)bp->b_data; 619 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 620 printf("Invalid file entry!\n"); 621 uma_zfree(udf_zone_node, unode); 622 brelse(bp); 623 return (ENOMEM); 624 } 625 size = UDF_FENTRY_SIZE + le32toh(fe->l_ea) + le32toh(fe->l_ad); 626 MALLOC(unode->fentry, struct file_entry *, size, M_UDFFENTRY, 627 M_NOWAIT | M_ZERO); 628 if (unode->fentry == NULL) { 629 printf("Cannot allocate file entry block\n"); 630 uma_zfree(udf_zone_node, unode); 631 brelse(bp); 632 return (ENOMEM); 633 } 634 635 bcopy(bp->b_data, unode->fentry, size); 636 637 brelse(bp); 638 bp = NULL; 639 640 if ((error = udf_allocv(mp, &vp, td))) { 641 printf("Error from udf_allocv\n"); 642 uma_zfree(udf_zone_node, unode); 643 return (error); 644 } 645 646 unode->i_vnode = vp; 647 unode->hash_id = ino; 648 unode->i_devvp = udfmp->im_devvp; 649 unode->i_dev = udfmp->im_dev; 650 unode->udfmp = udfmp; 651 vp->v_data = unode; 652 VREF(udfmp->im_devvp); 653 udf_hashins(unode); 654 655 switch (unode->fentry->icbtag.file_type) { 656 default: 657 vp->v_type = VBAD; 658 break; 659 case 4: 660 vp->v_type = VDIR; 661 break; 662 case 5: 663 vp->v_type = VREG; 664 break; 665 case 6: 666 vp->v_type = VBLK; 667 break; 668 case 7: 669 vp->v_type = VCHR; 670 break; 671 case 9: 672 vp->v_type = VFIFO; 673 break; 674 case 10: 675 vp->v_type = VSOCK; 676 break; 677 case 12: 678 vp->v_type = VLNK; 679 break; 680 } 681 *vpp = vp; 682 683 return (0); 684 } 685 686 struct ifid { 687 u_short ifid_len; 688 u_short ifid_pad; 689 int ifid_ino; 690 long ifid_start; 691 }; 692 693 static int 694 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 695 { 696 struct ifid *ifhp; 697 struct vnode *nvp; 698 int error; 699 700 ifhp = (struct ifid *)fhp; 701 702 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 703 *vpp = NULLVP; 704 return (error); 705 } 706 707 *vpp = nvp; 708 vnode_create_vobject(*vpp, 0, curthread); 709 return (0); 710 } 711 712 static int 713 udf_vptofh (struct vnode *vp, struct fid *fhp) 714 { 715 struct udf_node *node; 716 struct ifid *ifhp; 717 718 node = VTON(vp); 719 ifhp = (struct ifid *)fhp; 720 ifhp->ifid_len = sizeof(struct ifid); 721 ifhp->ifid_ino = node->hash_id; 722 723 return (0); 724 } 725 726 static int 727 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 728 { 729 union udf_pmap *pmap; 730 struct part_map_spare *pms; 731 struct regid *pmap_id; 732 struct buf *bp; 733 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 734 int i, ptype, psize, error; 735 736 for (i = 0; i < le32toh(lvd->n_pm); i++) { 737 pmap = (union udf_pmap *)&lvd->maps[i * UDF_PMAP_SIZE]; 738 ptype = pmap->data[0]; 739 psize = pmap->data[1]; 740 if (((ptype != 1) && (ptype != 2)) || 741 ((psize != UDF_PMAP_SIZE) && (psize != 6))) { 742 printf("Invalid partition map found\n"); 743 return (1); 744 } 745 746 if (ptype == 1) { 747 /* Type 1 map. We don't care */ 748 continue; 749 } 750 751 /* Type 2 map. Gotta find out the details */ 752 pmap_id = (struct regid *)&pmap->data[4]; 753 bzero(®id_id[0], UDF_REGID_ID_SIZE); 754 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 755 756 if (bcmp(®id_id[0], "*UDF Sparable Partition", 757 UDF_REGID_ID_SIZE)) { 758 printf("Unsupported partition map: %s\n", ®id_id[0]); 759 return (1); 760 } 761 762 pms = &pmap->pms; 763 MALLOC(udfmp->s_table, struct udf_sparing_table *, 764 le32toh(pms->st_size), M_UDFMOUNT, M_NOWAIT | M_ZERO); 765 if (udfmp->s_table == NULL) 766 return (ENOMEM); 767 768 /* Calculate the number of sectors per packet. */ 769 /* XXX Logical or physical? */ 770 udfmp->p_sectors = le16toh(pms->packet_len) / udfmp->bsize; 771 772 /* 773 * XXX If reading the first Sparing Table fails, should look 774 * for another table. 775 */ 776 if ((error = udf_readlblks(udfmp, le32toh(pms->st_loc[0]), 777 le32toh(pms->st_size), &bp)) != 0) { 778 if (bp != NULL) 779 brelse(bp); 780 printf("Failed to read Sparing Table at sector %d\n", 781 le32toh(pms->st_loc[0])); 782 return (error); 783 } 784 bcopy(bp->b_data, udfmp->s_table, le32toh(pms->st_size)); 785 brelse(bp); 786 787 if (udf_checktag(&udfmp->s_table->tag, 0)) { 788 printf("Invalid sparing table found\n"); 789 return (EINVAL); 790 } 791 792 /* See how many valid entries there are here. The list is 793 * supposed to be sorted. 0xfffffff0 and higher are not valid 794 */ 795 for (i = 0; i < le16toh(udfmp->s_table->rt_l); i++) { 796 udfmp->s_table_entries = i; 797 if (le32toh(udfmp->s_table->entries[i].org) >= 798 0xfffffff0) 799 break; 800 } 801 } 802 803 return (0); 804 } 805