Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/fs/udf/udf_vfsops.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * $FreeBSD$ 29 */ 30 31 /* udf_vfsops.c */ 32 /* Implement the VFS side of things */ 33 34 /* 35 * Ok, here's how it goes. The UDF specs are pretty clear on how each data 36 * structure is made up, but not very clear on how they relate to each other. 37 * Here is the skinny... This demostrates a filesystem with one file in the 38 * root directory. Subdirectories are treated just as normal files, but they 39 * have File Id Descriptors of their children as their file data. As for the 40 * Anchor Volume Descriptor Pointer, it can exist in two of the following three 41 * places: sector 256, sector n (the max sector of the disk), or sector 42 * n - 256. It's a pretty good bet that one will exist at sector 256 though. 43 * One caveat is unclosed CD media. For that, sector 256 cannot be written, 44 * so the Anchor Volume Descriptor Pointer can exist at sector 512 until the 45 * media is closed. 46 * 47 * Sector: 48 * 256: 49 * n: Anchor Volume Descriptor Pointer 50 * n - 256: | 51 * | 52 * |-->Main Volume Descriptor Sequence 53 * | | 54 * | | 55 * | |-->Logical Volume Descriptor 56 * | | 57 * |-->Partition Descriptor | 58 * | | 59 * | | 60 * |-->Fileset Descriptor 61 * | 62 * | 63 * |-->Root Dir File Entry 64 * | 65 * | 66 * |-->File data: 67 * File Id Descriptor 68 * | 69 * | 70 * |-->File Entry 71 * | 72 * | 73 * |-->File data 74 */ 75 #include <sys/types.h> 76 #include <sys/param.h> 77 #include <sys/systm.h> 78 #include <sys/uio.h> 79 #include <sys/bio.h> 80 #include <sys/buf.h> 81 #include <sys/conf.h> 82 #include <sys/dirent.h> 83 #include <sys/fcntl.h> 84 #include <sys/iconv.h> 85 #include <sys/kernel.h> 86 #include <sys/malloc.h> 87 #include <sys/mount.h> 88 #include <sys/namei.h> 89 #include <sys/priv.h> 90 #include <sys/proc.h> 91 #include <sys/queue.h> 92 #include <sys/vnode.h> 93 #include <sys/endian.h> 94 95 #include <geom/geom.h> 96 #include <geom/geom_vfs.h> 97 98 #include <vm/uma.h> 99 100 #include <fs/udf/ecma167-udf.h> 101 #include <fs/udf/osta.h> 102 #include <fs/udf/udf.h> 103 #include <fs/udf/udf_mount.h> 104 105 static MALLOC_DEFINE(M_UDFMOUNT, "udf_mount", "UDF mount structure"); 106 MALLOC_DEFINE(M_UDFFENTRY, "udf_fentry", "UDF file entry structure"); 107 108 struct iconv_functions *udf_iconv = NULL; 109 110 /* Zones */ 111 uma_zone_t udf_zone_trans = NULL; 112 uma_zone_t udf_zone_node = NULL; 113 uma_zone_t udf_zone_ds = NULL; 114 115 static vfs_init_t udf_init; 116 static vfs_uninit_t udf_uninit; 117 static vfs_mount_t udf_mount; 118 static vfs_root_t udf_root; 119 static vfs_statfs_t udf_statfs; 120 static vfs_unmount_t udf_unmount; 121 static vfs_fhtovp_t udf_fhtovp; 122 123 static int udf_find_partmaps(struct udf_mnt *, struct logvol_desc *); 124 125 static struct vfsops udf_vfsops = { 126 .vfs_fhtovp = udf_fhtovp, 127 .vfs_init = udf_init, 128 .vfs_mount = udf_mount, 129 .vfs_root = udf_root, 130 .vfs_statfs = udf_statfs, 131 .vfs_uninit = udf_uninit, 132 .vfs_unmount = udf_unmount, 133 .vfs_vget = udf_vget, 134 }; 135 VFS_SET(udf_vfsops, udf, VFCF_READONLY); 136 137 MODULE_VERSION(udf, 1); 138 139 static int udf_mountfs(struct vnode *, struct mount *); 140 141 static int 142 udf_init(struct vfsconf *foo) 143 { 144 145 /* 146 * This code used to pre-allocate a certain number of pages for each 147 * pool, reducing the need to grow the zones later on. UMA doesn't 148 * advertise any such functionality, unfortunately =-< 149 */ 150 udf_zone_trans = uma_zcreate("UDF translation buffer, zone", MAXNAMLEN * 151 sizeof(unicode_t), NULL, NULL, NULL, NULL, 0, 0); 152 153 udf_zone_node = uma_zcreate("UDF Node zone", sizeof(struct udf_node), 154 NULL, NULL, NULL, NULL, 0, 0); 155 156 udf_zone_ds = uma_zcreate("UDF Dirstream zone", 157 sizeof(struct udf_dirstream), NULL, NULL, NULL, NULL, 0, 0); 158 159 if ((udf_zone_node == NULL) || (udf_zone_trans == NULL) || 160 (udf_zone_ds == NULL)) { 161 printf("Cannot create allocation zones.\n"); 162 return (ENOMEM); 163 } 164 165 return 0; 166 } 167 168 static int 169 udf_uninit(struct vfsconf *foo) 170 { 171 172 if (udf_zone_trans != NULL) { 173 uma_zdestroy(udf_zone_trans); 174 udf_zone_trans = NULL; 175 } 176 177 if (udf_zone_node != NULL) { 178 uma_zdestroy(udf_zone_node); 179 udf_zone_node = NULL; 180 } 181 182 if (udf_zone_ds != NULL) { 183 uma_zdestroy(udf_zone_ds); 184 udf_zone_ds = NULL; 185 } 186 187 return (0); 188 } 189 190 static int 191 udf_mount(struct mount *mp) 192 { 193 struct vnode *devvp; /* vnode of the mount device */ 194 struct thread *td; 195 struct udf_mnt *imp = NULL; 196 struct vfsoptlist *opts; 197 char *fspec, *cs_disk, *cs_local; 198 int error, len, *udf_flags; 199 struct nameidata nd, *ndp = &nd; 200 201 td = curthread; 202 opts = mp->mnt_optnew; 203 204 /* 205 * Unconditionally mount as read-only. 206 */ 207 MNT_ILOCK(mp); 208 mp->mnt_flag |= MNT_RDONLY; 209 MNT_IUNLOCK(mp); 210 211 /* 212 * No root filesystem support. Probably not a big deal, since the 213 * bootloader doesn't understand UDF. 214 */ 215 if (mp->mnt_flag & MNT_ROOTFS) 216 return (ENOTSUP); 217 218 fspec = NULL; 219 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 220 if (!error && fspec[len - 1] != '\0') 221 return (EINVAL); 222 223 if (mp->mnt_flag & MNT_UPDATE) { 224 return (0); 225 } 226 227 /* Check that the mount device exists */ 228 if (fspec == NULL) 229 return (EINVAL); 230 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec); 231 if ((error = namei(ndp))) 232 return (error); 233 NDFREE_PNBUF(ndp); 234 devvp = ndp->ni_vp; 235 236 if (!vn_isdisk_error(devvp, &error)) { 237 vput(devvp); 238 return (error); 239 } 240 241 /* Check the access rights on the mount device */ 242 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td); 243 if (error) 244 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 245 if (error) { 246 vput(devvp); 247 return (error); 248 } 249 250 if ((error = udf_mountfs(devvp, mp))) { 251 vrele(devvp); 252 return (error); 253 } 254 255 imp = VFSTOUDFFS(mp); 256 257 udf_flags = NULL; 258 error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len); 259 if (error || len != sizeof(int)) 260 return (EINVAL); 261 imp->im_flags = *udf_flags; 262 263 if (imp->im_flags & UDFMNT_KICONV && udf_iconv) { 264 cs_disk = NULL; 265 error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len); 266 if (!error && cs_disk[len - 1] != '\0') 267 return (EINVAL); 268 cs_local = NULL; 269 error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len); 270 if (!error && cs_local[len - 1] != '\0') 271 return (EINVAL); 272 udf_iconv->open(cs_local, cs_disk, &imp->im_d2l); 273 #if 0 274 udf_iconv->open(cs_disk, cs_local, &imp->im_l2d); 275 #endif 276 } 277 278 vfs_mountedfrom(mp, fspec); 279 return 0; 280 }; 281 282 /* 283 * Check the descriptor tag for both the correct id and correct checksum. 284 * Return zero if all is good, EINVAL if not. 285 */ 286 int 287 udf_checktag(struct desc_tag *tag, uint16_t id) 288 { 289 uint8_t *itag; 290 uint8_t i, cksum = 0; 291 292 itag = (uint8_t *)tag; 293 294 if (le16toh(tag->id) != id) 295 return (EINVAL); 296 297 for (i = 0; i < 16; i++) 298 cksum = cksum + itag[i]; 299 cksum = cksum - itag[4]; 300 301 if (cksum == tag->cksum) 302 return (0); 303 304 return (EINVAL); 305 } 306 307 static int 308 udf_mountfs(struct vnode *devvp, struct mount *mp) 309 { 310 struct buf *bp = NULL; 311 struct cdev *dev; 312 struct anchor_vdp avdp; 313 struct udf_mnt *udfmp = NULL; 314 struct part_desc *pd; 315 struct logvol_desc *lvd; 316 struct fileset_desc *fsd; 317 struct file_entry *root_fentry; 318 uint32_t sector, size, mvds_start, mvds_end; 319 uint32_t logical_secsize; 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 dev = devvp->v_rdev; 329 dev_ref(dev); 330 g_topology_lock(); 331 error = g_vfs_open(devvp, &cp, "udf", 0); 332 g_topology_unlock(); 333 VOP_UNLOCK(devvp); 334 if (error) 335 goto bail; 336 337 bo = &devvp->v_bufobj; 338 339 if (devvp->v_rdev->si_iosize_max != 0) 340 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 341 if (mp->mnt_iosize_max > maxphys) 342 mp->mnt_iosize_max = maxphys; 343 344 /* XXX: should be M_WAITOK */ 345 udfmp = malloc(sizeof(struct udf_mnt), M_UDFMOUNT, 346 M_NOWAIT | M_ZERO); 347 if (udfmp == NULL) { 348 printf("Cannot allocate UDF mount struct\n"); 349 error = ENOMEM; 350 goto bail; 351 } 352 353 mp->mnt_data = udfmp; 354 mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev); 355 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 356 MNT_ILOCK(mp); 357 mp->mnt_flag |= MNT_LOCAL; 358 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED; 359 MNT_IUNLOCK(mp); 360 udfmp->im_mountp = mp; 361 udfmp->im_dev = dev; 362 udfmp->im_devvp = devvp; 363 udfmp->im_d2l = NULL; 364 udfmp->im_cp = cp; 365 udfmp->im_bo = bo; 366 367 #if 0 368 udfmp->im_l2d = NULL; 369 #endif 370 /* 371 * The UDF specification defines a logical sectorsize of 2048 372 * for DVD media. 373 */ 374 logical_secsize = 2048; 375 376 if (((logical_secsize % cp->provider->sectorsize) != 0) || 377 (logical_secsize < cp->provider->sectorsize)) { 378 error = EINVAL; 379 goto bail; 380 } 381 382 bsize = cp->provider->sectorsize; 383 384 /* 385 * Get the Anchor Volume Descriptor Pointer from sector 256. 386 * XXX Should also check sector n - 256, n, and 512. 387 */ 388 sector = 256; 389 if ((error = bread(devvp, sector * btodb(logical_secsize), bsize, 390 NOCRED, &bp)) != 0) 391 goto bail; 392 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 393 goto bail; 394 395 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 396 brelse(bp); 397 bp = NULL; 398 399 /* 400 * Extract the Partition Descriptor and Logical Volume Descriptor 401 * from the Volume Descriptor Sequence. 402 * XXX Should we care about the partition type right now? 403 * XXX What about multiple partitions? 404 */ 405 mvds_start = le32toh(avdp.main_vds_ex.loc); 406 mvds_end = mvds_start + (le32toh(avdp.main_vds_ex.len) - 1) / bsize; 407 for (sector = mvds_start; sector < mvds_end; sector++) { 408 if ((error = bread(devvp, sector * btodb(logical_secsize), 409 bsize, NOCRED, &bp)) != 0) { 410 printf("Can't read sector %d of VDS\n", sector); 411 goto bail; 412 } 413 lvd = (struct logvol_desc *)bp->b_data; 414 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 415 udfmp->bsize = le32toh(lvd->lb_size); 416 udfmp->bmask = udfmp->bsize - 1; 417 udfmp->bshift = ffs(udfmp->bsize) - 1; 418 fsd_part = le16toh(lvd->_lvd_use.fsd_loc.loc.part_num); 419 fsd_offset = le32toh(lvd->_lvd_use.fsd_loc.loc.lb_num); 420 if (udf_find_partmaps(udfmp, lvd)) 421 break; 422 logvol_found = 1; 423 } 424 pd = (struct part_desc *)bp->b_data; 425 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 426 part_found = 1; 427 part_num = le16toh(pd->part_num); 428 udfmp->part_len = le32toh(pd->part_len); 429 udfmp->part_start = le32toh(pd->start_loc); 430 } 431 432 brelse(bp); 433 bp = NULL; 434 if ((part_found) && (logvol_found)) 435 break; 436 } 437 438 if (!part_found || !logvol_found) { 439 error = EINVAL; 440 goto bail; 441 } 442 443 if (fsd_part != part_num) { 444 printf("FSD does not lie within the partition!\n"); 445 error = EINVAL; 446 goto bail; 447 } 448 449 /* 450 * Grab the Fileset Descriptor 451 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 452 * me in the right direction here. 453 */ 454 sector = udfmp->part_start + fsd_offset; 455 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 456 printf("Cannot read sector %d of FSD\n", sector); 457 goto bail; 458 } 459 fsd = (struct fileset_desc *)bp->b_data; 460 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 461 fsd_found = 1; 462 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 463 sizeof(struct long_ad)); 464 } 465 466 brelse(bp); 467 bp = NULL; 468 469 if (!fsd_found) { 470 printf("Couldn't find the fsd\n"); 471 error = EINVAL; 472 goto bail; 473 } 474 475 /* 476 * Find the file entry for the root directory. 477 */ 478 sector = le32toh(udfmp->root_icb.loc.lb_num) + udfmp->part_start; 479 size = le32toh(udfmp->root_icb.len); 480 if ((error = udf_readdevblks(udfmp, sector, size, &bp)) != 0) { 481 printf("Cannot read sector %d\n", sector); 482 goto bail; 483 } 484 485 root_fentry = (struct file_entry *)bp->b_data; 486 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 487 printf("Invalid root file entry!\n"); 488 goto bail; 489 } 490 491 brelse(bp); 492 bp = NULL; 493 494 return 0; 495 496 bail: 497 if (udfmp != NULL) 498 free(udfmp, M_UDFMOUNT); 499 if (bp != NULL) 500 brelse(bp); 501 if (cp != NULL) { 502 g_topology_lock(); 503 g_vfs_close(cp); 504 g_topology_unlock(); 505 } 506 dev_rel(dev); 507 return error; 508 }; 509 510 static int 511 udf_unmount(struct mount *mp, int mntflags) 512 { 513 struct udf_mnt *udfmp; 514 int error, flags = 0; 515 516 udfmp = VFSTOUDFFS(mp); 517 518 if (mntflags & MNT_FORCE) 519 flags |= FORCECLOSE; 520 521 if ((error = vflush(mp, 0, flags, curthread))) 522 return (error); 523 524 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 525 if (udfmp->im_d2l) 526 udf_iconv->close(udfmp->im_d2l); 527 #if 0 528 if (udfmp->im_l2d) 529 udf_iconv->close(udfmp->im_l2d); 530 #endif 531 } 532 533 g_topology_lock(); 534 g_vfs_close(udfmp->im_cp); 535 g_topology_unlock(); 536 vrele(udfmp->im_devvp); 537 dev_rel(udfmp->im_dev); 538 539 if (udfmp->s_table != NULL) 540 free(udfmp->s_table, M_UDFMOUNT); 541 542 free(udfmp, M_UDFMOUNT); 543 544 mp->mnt_data = NULL; 545 return (0); 546 } 547 548 static int 549 udf_root(struct mount *mp, int flags, struct vnode **vpp) 550 { 551 struct udf_mnt *udfmp; 552 ino_t id; 553 554 udfmp = VFSTOUDFFS(mp); 555 556 id = udf_getid(&udfmp->root_icb); 557 558 return (udf_vget(mp, id, flags, vpp)); 559 } 560 561 static int 562 udf_statfs(struct mount *mp, struct statfs *sbp) 563 { 564 struct udf_mnt *udfmp; 565 566 udfmp = VFSTOUDFFS(mp); 567 568 sbp->f_bsize = udfmp->bsize; 569 sbp->f_iosize = udfmp->bsize; 570 sbp->f_blocks = udfmp->part_len; 571 sbp->f_bfree = 0; 572 sbp->f_bavail = 0; 573 sbp->f_files = 0; 574 sbp->f_ffree = 0; 575 return 0; 576 } 577 578 int 579 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 580 { 581 struct buf *bp; 582 struct vnode *devvp; 583 struct udf_mnt *udfmp; 584 struct thread *td; 585 struct vnode *vp; 586 struct udf_node *unode; 587 struct file_entry *fe; 588 uint32_t lea, lad; 589 int error, sector, size; 590 591 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 592 if (error || *vpp != NULL) 593 return (error); 594 595 /* 596 * We must promote to an exclusive lock for vnode creation. This 597 * can happen if lookup is passed LOCKSHARED. 598 */ 599 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 600 flags &= ~LK_TYPE_MASK; 601 flags |= LK_EXCLUSIVE; 602 } 603 604 /* 605 * We do not lock vnode creation as it is believed to be too 606 * expensive for such rare case as simultaneous creation of vnode 607 * for same ino by different processes. We just allow them to race 608 * and check later to decide who wins. Let the race begin! 609 */ 610 611 td = curthread; 612 udfmp = VFSTOUDFFS(mp); 613 614 unode = uma_zalloc(udf_zone_node, M_WAITOK | M_ZERO); 615 616 if ((error = udf_allocv(mp, &vp, td))) { 617 printf("Error from udf_allocv\n"); 618 uma_zfree(udf_zone_node, unode); 619 return (error); 620 } 621 622 unode->i_vnode = vp; 623 unode->hash_id = ino; 624 unode->udfmp = udfmp; 625 vp->v_data = unode; 626 627 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 628 error = insmntque(vp, mp); 629 if (error != 0) { 630 uma_zfree(udf_zone_node, unode); 631 return (error); 632 } 633 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL); 634 if (error || *vpp != NULL) 635 return (error); 636 637 /* 638 * Copy in the file entry. Per the spec, the size can only be 1 block. 639 */ 640 sector = ino + udfmp->part_start; 641 devvp = udfmp->im_devvp; 642 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 643 printf("Cannot read sector %d\n", sector); 644 goto error; 645 } 646 647 /* 648 * File entry length validation. 649 */ 650 fe = (struct file_entry *)bp->b_data; 651 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 652 printf("Invalid file entry!\n"); 653 error = ENOMEM; 654 goto error; 655 } 656 lea = le32toh(fe->l_ea); 657 lad = le32toh(fe->l_ad); 658 if (lea > udfmp->bsize || lad > udfmp->bsize) { 659 printf("Invalid EA and AD lengths %u, %u\n", lea, lad); 660 error = EIO; 661 goto error; 662 } 663 size = UDF_FENTRY_SIZE + lea + lad; 664 if (size > udfmp->bsize) { 665 printf("Invalid file entry size %u\n", size); 666 error = EIO; 667 goto error; 668 } 669 670 unode->fentry = malloc(size, M_UDFFENTRY, M_NOWAIT | M_ZERO); 671 if (unode->fentry == NULL) { 672 printf("Cannot allocate file entry block\n"); 673 error = ENOMEM; 674 goto error; 675 } 676 677 bcopy(bp->b_data, unode->fentry, size); 678 679 brelse(bp); 680 bp = NULL; 681 682 switch (unode->fentry->icbtag.file_type) { 683 default: 684 vp->v_type = VBAD; 685 break; 686 case 4: 687 vp->v_type = VDIR; 688 break; 689 case 5: 690 vp->v_type = VREG; 691 break; 692 case 6: 693 vp->v_type = VBLK; 694 break; 695 case 7: 696 vp->v_type = VCHR; 697 break; 698 case 9: 699 vp->v_type = VFIFO; 700 vp->v_op = &udf_fifoops; 701 break; 702 case 10: 703 vp->v_type = VSOCK; 704 break; 705 case 12: 706 vp->v_type = VLNK; 707 break; 708 } 709 710 if (vp->v_type != VFIFO) 711 VN_LOCK_ASHARE(vp); 712 713 if (ino == udf_getid(&udfmp->root_icb)) 714 vp->v_vflag |= VV_ROOT; 715 716 vn_set_state(vp, VSTATE_CONSTRUCTED); 717 *vpp = vp; 718 719 return (0); 720 721 error: 722 vgone(vp); 723 vput(vp); 724 brelse(bp); 725 *vpp = NULL; 726 return (error); 727 } 728 729 static int 730 udf_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp) 731 { 732 struct ifid *ifhp; 733 struct vnode *nvp; 734 struct udf_node *np; 735 off_t fsize; 736 int error; 737 738 ifhp = (struct ifid *)fhp; 739 740 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 741 *vpp = NULLVP; 742 return (error); 743 } 744 745 np = VTON(nvp); 746 fsize = le64toh(np->fentry->inf_len); 747 748 *vpp = nvp; 749 vnode_create_vobject(*vpp, fsize, curthread); 750 return (0); 751 } 752 753 static int 754 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 755 { 756 struct part_map_spare *pms; 757 struct regid *pmap_id; 758 struct buf *bp; 759 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 760 int i, k, ptype, psize, error; 761 uint8_t *pmap = (uint8_t *) &lvd->maps[0]; 762 763 for (i = 0; i < le32toh(lvd->n_pm); i++) { 764 ptype = pmap[0]; 765 psize = pmap[1]; 766 if (((ptype != 1) && (ptype != 2)) || 767 ((psize != UDF_PMAP_TYPE1_SIZE) && 768 (psize != UDF_PMAP_TYPE2_SIZE))) { 769 printf("Invalid partition map found\n"); 770 return (1); 771 } 772 773 if (ptype == 1) { 774 /* Type 1 map. We don't care */ 775 pmap += UDF_PMAP_TYPE1_SIZE; 776 continue; 777 } 778 779 /* Type 2 map. Gotta find out the details */ 780 pmap_id = (struct regid *)&pmap[4]; 781 bzero(®id_id[0], UDF_REGID_ID_SIZE); 782 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 783 784 if (bcmp(®id_id[0], "*UDF Sparable Partition", 785 UDF_REGID_ID_SIZE)) { 786 printf("Unsupported partition map: %s\n", ®id_id[0]); 787 return (1); 788 } 789 790 pms = (struct part_map_spare *)pmap; 791 pmap += UDF_PMAP_TYPE2_SIZE; 792 udfmp->s_table = malloc(le32toh(pms->st_size), 793 M_UDFMOUNT, M_NOWAIT | M_ZERO); 794 if (udfmp->s_table == NULL) 795 return (ENOMEM); 796 797 /* Calculate the number of sectors per packet. */ 798 /* XXX Logical or physical? */ 799 udfmp->p_sectors = le16toh(pms->packet_len) / udfmp->bsize; 800 801 /* 802 * XXX If reading the first Sparing Table fails, should look 803 * for another table. 804 */ 805 if ((error = udf_readdevblks(udfmp, le32toh(pms->st_loc[0]), 806 le32toh(pms->st_size), &bp)) != 0) { 807 if (bp != NULL) 808 brelse(bp); 809 printf("Failed to read Sparing Table at sector %d\n", 810 le32toh(pms->st_loc[0])); 811 free(udfmp->s_table, M_UDFMOUNT); 812 return (error); 813 } 814 bcopy(bp->b_data, udfmp->s_table, le32toh(pms->st_size)); 815 brelse(bp); 816 817 if (udf_checktag(&udfmp->s_table->tag, 0)) { 818 printf("Invalid sparing table found\n"); 819 free(udfmp->s_table, M_UDFMOUNT); 820 return (EINVAL); 821 } 822 823 /* See how many valid entries there are here. The list is 824 * supposed to be sorted. 0xfffffff0 and higher are not valid 825 */ 826 for (k = 0; k < le16toh(udfmp->s_table->rt_l); k++) { 827 udfmp->s_table_entries = k; 828 if (le32toh(udfmp->s_table->entries[k].org) >= 829 0xfffffff0) 830 break; 831 } 832 } 833 834 return (0); 835 }
Cache object: 5caa1391f3f1102a64f84303e11dda19
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