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 91 #include <vm/uma.h> 92 93 #include <fs/udf/ecma167-udf.h> 94 #include <fs/udf/osta.h> 95 #include <fs/udf/udf.h> 96 #include <fs/udf/udf_mount.h> 97 98 MALLOC_DEFINE(M_UDFMOUNT, "UDF mount", "UDF mount structure"); 99 MALLOC_DEFINE(M_UDFFENTRY, "UDF fentry", "UDF file entry structure"); 100 101 struct iconv_functions *udf_iconv = NULL; 102 103 /* Zones */ 104 uma_zone_t udf_zone_trans = NULL; 105 uma_zone_t udf_zone_node = NULL; 106 uma_zone_t udf_zone_ds = NULL; 107 108 static vfs_init_t udf_init; 109 static vfs_uninit_t udf_uninit; 110 static vfs_nmount_t udf_mount; 111 static vfs_root_t udf_root; 112 static vfs_statfs_t udf_statfs; 113 static vfs_unmount_t udf_unmount; 114 static vfs_fhtovp_t udf_fhtovp; 115 static vfs_vptofh_t udf_vptofh; 116 117 static int udf_find_partmaps(struct udf_mnt *, struct logvol_desc *); 118 119 static struct vfsops udf_vfsops = { 120 .vfs_fhtovp = udf_fhtovp, 121 .vfs_init = udf_init, 122 .vfs_nmount = udf_mount, 123 .vfs_root = udf_root, 124 .vfs_statfs = udf_statfs, 125 .vfs_uninit = udf_uninit, 126 .vfs_unmount = udf_unmount, 127 .vfs_vget = udf_vget, 128 .vfs_vptofh = udf_vptofh, 129 }; 130 VFS_SET(udf_vfsops, udf, VFCF_READONLY); 131 132 MODULE_VERSION(udf, 1); 133 134 static int udf_mountfs(struct vnode *, struct mount *, struct thread *); 135 136 static int 137 udf_init(struct vfsconf *foo) 138 { 139 140 /* 141 * This code used to pre-allocate a certain number of pages for each 142 * pool, reducing the need to grow the zones later on. UMA doesn't 143 * advertise any such functionality, unfortunately =-< 144 */ 145 udf_zone_trans = uma_zcreate("UDF translation buffer, zone", MAXNAMLEN * 146 sizeof(unicode_t), NULL, NULL, NULL, NULL, 0, 0); 147 148 udf_zone_node = uma_zcreate("UDF Node zone", sizeof(struct udf_node), 149 NULL, NULL, NULL, NULL, 0, 0); 150 151 udf_zone_ds = uma_zcreate("UDF Dirstream zone", 152 sizeof(struct udf_dirstream), NULL, NULL, NULL, NULL, 0, 0); 153 154 if ((udf_zone_node == NULL) || (udf_zone_trans == NULL) || 155 (udf_zone_ds == NULL)) { 156 printf("Cannot create allocation zones.\n"); 157 return (ENOMEM); 158 } 159 160 return 0; 161 } 162 163 static int 164 udf_uninit(struct vfsconf *foo) 165 { 166 167 if (udf_zone_trans != NULL) { 168 uma_zdestroy(udf_zone_trans); 169 udf_zone_trans = NULL; 170 } 171 172 if (udf_zone_node != NULL) { 173 uma_zdestroy(udf_zone_node); 174 udf_zone_node = NULL; 175 } 176 177 if (udf_zone_ds != NULL) { 178 uma_zdestroy(udf_zone_ds); 179 udf_zone_ds = NULL; 180 } 181 182 return (0); 183 } 184 185 static int 186 udf_mount(struct mount *mp, struct nameidata *ndp, struct thread *td) 187 { 188 struct vnode *devvp; /* vnode of the mount device */ 189 struct udf_mnt *imp = 0; 190 struct export_args *export; 191 struct vfsoptlist *opts; 192 char *fspec, *cs_disk, *cs_local; 193 size_t size; 194 int error, len, *udf_flags; 195 196 opts = mp->mnt_optnew; 197 198 if ((mp->mnt_flag & MNT_RDONLY) == 0) 199 return (EROFS); 200 201 /* 202 * No root filesystem support. Probably not a big deal, since the 203 * bootloader doesn't understand UDF. 204 */ 205 if (mp->mnt_flag & MNT_ROOTFS) 206 return (ENOTSUP); 207 208 fspec = NULL; 209 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 210 if (!error && fspec[len - 1] != '\0') 211 return (EINVAL); 212 213 if (mp->mnt_flag & MNT_UPDATE) { 214 imp = VFSTOUDFFS(mp); 215 if (fspec == NULL) { 216 error = vfs_getopt(opts, "export", (void **)&export, 217 &len); 218 if (error || len != sizeof(struct export_args)) 219 return (EINVAL); 220 return (vfs_export(mp, export)); 221 } 222 } 223 224 /* Check that the mount device exists */ 225 if (fspec == NULL) 226 return (EINVAL); 227 NDINIT(ndp, LOOKUP, FOLLOW, 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 vrele(devvp); 235 return (error); 236 } 237 238 /* Check the access rights on the mount device */ 239 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 240 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td); 241 if (error) 242 error = suser(td); 243 if (error) { 244 vput(devvp); 245 return (error); 246 } 247 VOP_UNLOCK(devvp, 0, td); 248 249 if ((error = udf_mountfs(devvp, mp, td))) { 250 vrele(devvp); 251 return (error); 252 } 253 254 imp = VFSTOUDFFS(mp); 255 256 udf_flags = NULL; 257 error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len); 258 if (error || len != sizeof(int)) 259 return (EINVAL); 260 imp->im_flags = *udf_flags; 261 262 if (imp->im_flags & UDFMNT_KICONV && udf_iconv) { 263 cs_disk = NULL; 264 error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len); 265 if (!error && cs_disk[len - 1] != '\0') 266 return (EINVAL); 267 cs_local = NULL; 268 error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len); 269 if (!error && cs_local[len - 1] != '\0') 270 return (EINVAL); 271 udf_iconv->open(cs_local, cs_disk, &imp->im_d2l); 272 #if 0 273 udf_iconv->open(cs_disk, cs_local, &imp->im_l2d); 274 #endif 275 } 276 277 copystr(fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); 278 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 279 udf_statfs(mp, &mp->mnt_stat, td); 280 return 0; 281 }; 282 283 /* 284 * Check the descriptor tag for both the correct id and correct checksum. 285 * Return zero if all is good, EINVAL if not. 286 */ 287 int 288 udf_checktag(struct desc_tag *tag, uint16_t id) 289 { 290 uint8_t *itag; 291 uint8_t i, cksum = 0; 292 293 itag = (uint8_t *)tag; 294 295 if (tag->id != id) 296 return (EINVAL); 297 298 for (i = 0; i < 15; i++) 299 cksum = cksum + itag[i]; 300 cksum = cksum - itag[4]; 301 302 if (cksum == tag->cksum) 303 return (0); 304 305 return (EINVAL); 306 } 307 308 static int 309 udf_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td) { 310 struct buf *bp = NULL; 311 struct anchor_vdp avdp; 312 struct udf_mnt *udfmp = NULL; 313 struct part_desc *pd; 314 struct logvol_desc *lvd; 315 struct fileset_desc *fsd; 316 struct file_entry *root_fentry; 317 uint32_t sector, size, mvds_start, mvds_end; 318 uint32_t fsd_offset = 0; 319 uint16_t part_num = 0, fsd_part = 0; 320 int error = EINVAL, needclose = 0; 321 int logvol_found = 0, part_found = 0, fsd_found = 0; 322 int bsize; 323 324 /* 325 * Disallow multiple mounts of the same device. Flush the buffer 326 * cache for the device. 327 */ 328 if ((error = vfs_mountedon(devvp))) 329 return (error); 330 if (vcount(devvp) > 1) 331 return (EBUSY); 332 if ((error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0))) 333 return (error); 334 335 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 336 error = VOP_OPEN(devvp, FREAD, FSCRED, td, -1); 337 VOP_UNLOCK(devvp, 0, td); 338 if (error) 339 return error; 340 needclose = 1; 341 342 MALLOC(udfmp, struct udf_mnt *, sizeof(struct udf_mnt), M_UDFMOUNT, 343 M_NOWAIT | M_ZERO); 344 if (udfmp == NULL) { 345 printf("Cannot allocate UDF mount struct\n"); 346 error = ENOMEM; 347 goto bail; 348 } 349 350 mp->mnt_data = (qaddr_t)udfmp; 351 mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev); 352 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 353 mp->mnt_flag |= MNT_LOCAL; 354 udfmp->im_mountp = mp; 355 udfmp->im_dev = devvp->v_rdev; 356 udfmp->im_devvp = devvp; 357 udfmp->im_d2l = NULL; 358 #if 0 359 udfmp->im_l2d = NULL; 360 #endif 361 362 bsize = 2048; /* XXX Should probe the media for it's size */ 363 364 /* 365 * Get the Anchor Volume Descriptor Pointer from sector 256. 366 * XXX Should also check sector n - 256, n, and 512. 367 */ 368 sector = 256; 369 if ((error = bread(devvp, sector * btodb(bsize), bsize, NOCRED, 370 &bp)) != 0) 371 goto bail; 372 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 373 goto bail; 374 375 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 376 brelse(bp); 377 bp = NULL; 378 379 /* 380 * Extract the Partition Descriptor and Logical Volume Descriptor 381 * from the Volume Descriptor Sequence. 382 * XXX Should we care about the partition type right now? 383 * XXX What about multiple partitions? 384 */ 385 mvds_start = avdp.main_vds_ex.loc; 386 mvds_end = mvds_start + (avdp.main_vds_ex.len - 1) / bsize; 387 for (sector = mvds_start; sector < mvds_end; sector++) { 388 if ((error = bread(devvp, sector * btodb(bsize), bsize, 389 NOCRED, &bp)) != 0) { 390 printf("Can't read sector %d of VDS\n", sector); 391 goto bail; 392 } 393 lvd = (struct logvol_desc *)bp->b_data; 394 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 395 udfmp->bsize = lvd->lb_size; 396 udfmp->bmask = udfmp->bsize - 1; 397 udfmp->bshift = ffs(udfmp->bsize) - 1; 398 fsd_part = lvd->_lvd_use.fsd_loc.loc.part_num; 399 fsd_offset = lvd->_lvd_use.fsd_loc.loc.lb_num; 400 if (udf_find_partmaps(udfmp, lvd)) 401 break; 402 logvol_found = 1; 403 } 404 pd = (struct part_desc *)bp->b_data; 405 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 406 part_found = 1; 407 part_num = pd->part_num; 408 udfmp->part_len = pd->part_len; 409 udfmp->part_start = pd->start_loc; 410 } 411 412 brelse(bp); 413 bp = NULL; 414 if ((part_found) && (logvol_found)) 415 break; 416 } 417 418 if (!part_found || !logvol_found) { 419 error = EINVAL; 420 goto bail; 421 } 422 423 if (fsd_part != part_num) { 424 printf("FSD does not lie within the partition!\n"); 425 error = EINVAL; 426 goto bail; 427 } 428 429 430 /* 431 * Grab the Fileset Descriptor 432 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 433 * me in the right direction here. 434 */ 435 sector = udfmp->part_start + fsd_offset; 436 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 437 printf("Cannot read sector %d of FSD\n", sector); 438 goto bail; 439 } 440 fsd = (struct fileset_desc *)bp->b_data; 441 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 442 fsd_found = 1; 443 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 444 sizeof(struct long_ad)); 445 } 446 447 brelse(bp); 448 bp = NULL; 449 450 if (!fsd_found) { 451 printf("Couldn't find the fsd\n"); 452 error = EINVAL; 453 goto bail; 454 } 455 456 /* 457 * Find the file entry for the root directory. 458 */ 459 sector = udfmp->root_icb.loc.lb_num + udfmp->part_start; 460 size = udfmp->root_icb.len; 461 if ((error = udf_readlblks(udfmp, sector, size, &bp)) != 0) { 462 printf("Cannot read sector %d\n", sector); 463 goto bail; 464 } 465 466 root_fentry = (struct file_entry *)bp->b_data; 467 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 468 printf("Invalid root file entry!\n"); 469 goto bail; 470 } 471 472 brelse(bp); 473 bp = NULL; 474 475 devvp->v_rdev->si_mountpoint = mp; 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 if (needclose) 488 VOP_CLOSE(devvp, FREAD, NOCRED, td); 489 return error; 490 }; 491 492 static int 493 udf_unmount(struct mount *mp, int mntflags, struct thread *td) 494 { 495 struct udf_mnt *udfmp; 496 int error, flags = 0; 497 498 udfmp = VFSTOUDFFS(mp); 499 500 if (mntflags & MNT_FORCE) 501 flags |= FORCECLOSE; 502 503 if ((error = vflush(mp, 0, flags))) 504 return (error); 505 506 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 507 if (udfmp->im_d2l) 508 udf_iconv->close(udfmp->im_d2l); 509 #if 0 510 if (udfmp->im_l2d) 511 udf_iconv->close(udfmp->im_l2d); 512 #endif 513 } 514 515 udfmp->im_devvp->v_rdev->si_mountpoint = NULL; 516 error = VOP_CLOSE(udfmp->im_devvp, FREAD, NOCRED, td); 517 vrele(udfmp->im_devvp); 518 519 if (udfmp->s_table != NULL) 520 FREE(udfmp->s_table, M_UDFMOUNT); 521 522 if (udfmp->hashtbl != NULL) 523 FREE(udfmp->hashtbl, M_UDFMOUNT); 524 525 FREE(udfmp, M_UDFMOUNT); 526 527 mp->mnt_data = (qaddr_t)0; 528 mp->mnt_flag &= ~MNT_LOCAL; 529 530 return (0); 531 } 532 533 static int 534 udf_root(struct mount *mp, struct vnode **vpp) 535 { 536 struct udf_mnt *udfmp; 537 struct vnode *vp; 538 ino_t id; 539 int error; 540 541 udfmp = VFSTOUDFFS(mp); 542 543 id = udf_getid(&udfmp->root_icb); 544 545 error = udf_vget(mp, id, LK_EXCLUSIVE, vpp); 546 if (error) 547 return error; 548 549 vp = *vpp; 550 vp->v_vflag |= VV_ROOT; 551 udfmp->root_vp = vp; 552 553 return (0); 554 } 555 556 static int 557 udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 558 { 559 struct udf_mnt *udfmp; 560 561 udfmp = VFSTOUDFFS(mp); 562 563 sbp->f_bsize = udfmp->bsize; 564 sbp->f_iosize = udfmp->bsize; 565 sbp->f_blocks = udfmp->part_len; 566 sbp->f_bfree = 0; 567 sbp->f_bavail = 0; 568 sbp->f_files = 0; 569 sbp->f_ffree = 0; 570 if (sbp != &mp->mnt_stat) { 571 sbp->f_type = mp->mnt_vfc->vfc_typenum; 572 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 573 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 574 } 575 576 return 0; 577 } 578 579 int 580 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 581 { 582 struct buf *bp; 583 struct vnode *devvp; 584 struct udf_mnt *udfmp; 585 struct thread *td; 586 struct vnode *vp; 587 struct udf_node *unode; 588 struct file_entry *fe; 589 int error, sector, size; 590 591 td = curthread; 592 udfmp = VFSTOUDFFS(mp); 593 594 /* See if we already have this in the cache */ 595 if ((error = udf_hashlookup(udfmp, ino, flags, vpp)) != 0) 596 return (error); 597 if (*vpp != NULL) { 598 return (0); 599 } 600 601 /* 602 * Allocate memory and check the tag id's before grabbing a new 603 * vnode, since it's hard to roll back if there is a problem. 604 */ 605 unode = uma_zalloc(udf_zone_node, M_WAITOK); 606 if (unode == NULL) { 607 printf("Cannot allocate udf node\n"); 608 return (ENOMEM); 609 } 610 611 /* 612 * Copy in the file entry. Per the spec, the size can only be 1 block. 613 */ 614 sector = ino + udfmp->part_start; 615 devvp = udfmp->im_devvp; 616 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 617 printf("Cannot read sector %d\n", sector); 618 uma_zfree(udf_zone_node, unode); 619 return (error); 620 } 621 622 fe = (struct file_entry *)bp->b_data; 623 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 624 printf("Invalid file entry!\n"); 625 uma_zfree(udf_zone_node, unode); 626 brelse(bp); 627 return (ENOMEM); 628 } 629 size = UDF_FENTRY_SIZE + fe->l_ea + fe->l_ad; 630 MALLOC(unode->fentry, struct file_entry *, size, M_UDFFENTRY, 631 M_NOWAIT | M_ZERO); 632 if (unode->fentry == NULL) { 633 printf("Cannot allocate file entry block\n"); 634 uma_zfree(udf_zone_node, unode); 635 brelse(bp); 636 return (ENOMEM); 637 } 638 639 bcopy(bp->b_data, unode->fentry, size); 640 641 brelse(bp); 642 bp = NULL; 643 644 if ((error = udf_allocv(mp, &vp, td))) { 645 printf("Error from udf_allocv\n"); 646 uma_zfree(udf_zone_node, unode); 647 return (error); 648 } 649 650 unode->i_vnode = vp; 651 unode->hash_id = ino; 652 unode->i_devvp = udfmp->im_devvp; 653 unode->i_dev = udfmp->im_dev; 654 unode->udfmp = udfmp; 655 vp->v_data = unode; 656 VREF(udfmp->im_devvp); 657 udf_hashins(unode); 658 659 switch (unode->fentry->icbtag.file_type) { 660 default: 661 vp->v_type = VBAD; 662 break; 663 case 4: 664 vp->v_type = VDIR; 665 break; 666 case 5: 667 vp->v_type = VREG; 668 break; 669 case 6: 670 vp->v_type = VBLK; 671 break; 672 case 7: 673 vp->v_type = VCHR; 674 break; 675 case 9: 676 vp->v_type = VFIFO; 677 break; 678 case 10: 679 vp->v_type = VSOCK; 680 break; 681 case 12: 682 vp->v_type = VLNK; 683 break; 684 } 685 *vpp = vp; 686 687 return (0); 688 } 689 690 struct ifid { 691 u_short ifid_len; 692 u_short ifid_pad; 693 int ifid_ino; 694 long ifid_start; 695 }; 696 697 static int 698 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 699 { 700 struct ifid *ifhp; 701 struct vnode *nvp; 702 int error; 703 704 ifhp = (struct ifid *)fhp; 705 706 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 707 *vpp = NULLVP; 708 return (error); 709 } 710 711 *vpp = nvp; 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 union udf_pmap *pmap; 733 struct part_map_spare *pms; 734 struct regid *pmap_id; 735 struct buf *bp; 736 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 737 int i, ptype, psize, error; 738 739 for (i = 0; i < lvd->n_pm; i++) { 740 pmap = (union udf_pmap *)&lvd->maps[i * UDF_PMAP_SIZE]; 741 ptype = pmap->data[0]; 742 psize = pmap->data[1]; 743 if (((ptype != 1) && (ptype != 2)) || 744 ((psize != UDF_PMAP_SIZE) && (psize != 6))) { 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 continue; 752 } 753 754 /* Type 2 map. Gotta find out the details */ 755 pmap_id = (struct regid *)&pmap->data[4]; 756 bzero(®id_id[0], UDF_REGID_ID_SIZE); 757 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 758 759 if (bcmp(®id_id[0], "*UDF Sparable Partition", 760 UDF_REGID_ID_SIZE)) { 761 printf("Unsupported partition map: %s\n", ®id_id[0]); 762 return (1); 763 } 764 765 pms = &pmap->pms; 766 MALLOC(udfmp->s_table, struct udf_sparing_table *, pms->st_size, 767 M_UDFMOUNT, M_NOWAIT | M_ZERO); 768 if (udfmp->s_table == NULL) 769 return (ENOMEM); 770 771 /* Calculate the number of sectors per packet. */ 772 /* XXX Logical or physical? */ 773 udfmp->p_sectors = pms->packet_len / udfmp->bsize; 774 775 /* 776 * XXX If reading the first Sparing Table fails, should look 777 * for another table. 778 */ 779 if ((error = udf_readlblks(udfmp, pms->st_loc[0], pms->st_size, 780 &bp)) != 0) { 781 printf("Failed to read Sparing Table at sector %d\n", 782 pms->st_loc[0]); 783 return (error); 784 } 785 bcopy(bp->b_data, udfmp->s_table, pms->st_size); 786 brelse(bp); 787 788 if (udf_checktag(&udfmp->s_table->tag, 0)) { 789 printf("Invalid sparing table found\n"); 790 return (EINVAL); 791 } 792 793 /* See how many valid entries there are here. The list is 794 * supposed to be sorted. 0xfffffff0 and higher are not valid 795 */ 796 for (i = 0; i < udfmp->s_table->rt_l; i++) { 797 udfmp->s_table_entries = i; 798 if (udfmp->s_table->entries[i].org >= 0xfffffff0) 799 break; 800 } 801 } 802 803 return (0); 804 } 805