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 * 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) 190 { 191 struct vnode *devvp; /* vnode of the mount device */ 192 struct thread *td; 193 struct udf_mnt *imp = NULL; 194 struct vfsoptlist *opts; 195 char *fspec, *cs_disk, *cs_local; 196 int error, len, *udf_flags; 197 struct nameidata nd, *ndp = &nd; 198 199 td = curthread; 200 opts = mp->mnt_optnew; 201 202 /* 203 * Unconditionally mount as read-only. 204 */ 205 MNT_ILOCK(mp); 206 mp->mnt_flag |= MNT_RDONLY; 207 MNT_IUNLOCK(mp); 208 209 /* 210 * No root filesystem support. Probably not a big deal, since the 211 * bootloader doesn't understand UDF. 212 */ 213 if (mp->mnt_flag & MNT_ROOTFS) 214 return (ENOTSUP); 215 216 fspec = NULL; 217 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 218 if (!error && fspec[len - 1] != '\0') 219 return (EINVAL); 220 221 if (mp->mnt_flag & MNT_UPDATE) { 222 return (0); 223 } 224 225 /* Check that the mount device exists */ 226 if (fspec == NULL) 227 return (EINVAL); 228 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 229 if ((error = namei(ndp))) 230 return (error); 231 NDFREE(ndp, NDF_ONLY_PNBUF); 232 devvp = ndp->ni_vp; 233 234 if (vn_isdisk(devvp, &error) == 0) { 235 vput(devvp); 236 return (error); 237 } 238 239 /* Check the access rights on the mount device */ 240 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td); 241 if (error) 242 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 243 if (error) { 244 vput(devvp); 245 return (error); 246 } 247 248 if ((error = udf_mountfs(devvp, mp))) { 249 vrele(devvp); 250 return (error); 251 } 252 253 imp = VFSTOUDFFS(mp); 254 255 udf_flags = NULL; 256 error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len); 257 if (error || len != sizeof(int)) 258 return (EINVAL); 259 imp->im_flags = *udf_flags; 260 261 if (imp->im_flags & UDFMNT_KICONV && udf_iconv) { 262 cs_disk = NULL; 263 error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len); 264 if (!error && cs_disk[len - 1] != '\0') 265 return (EINVAL); 266 cs_local = NULL; 267 error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len); 268 if (!error && cs_local[len - 1] != '\0') 269 return (EINVAL); 270 udf_iconv->open(cs_local, cs_disk, &imp->im_d2l); 271 #if 0 272 udf_iconv->open(cs_disk, cs_local, &imp->im_l2d); 273 #endif 274 } 275 276 vfs_mountedfrom(mp, fspec); 277 return 0; 278 }; 279 280 /* 281 * Check the descriptor tag for both the correct id and correct checksum. 282 * Return zero if all is good, EINVAL if not. 283 */ 284 int 285 udf_checktag(struct desc_tag *tag, uint16_t id) 286 { 287 uint8_t *itag; 288 uint8_t i, cksum = 0; 289 290 itag = (uint8_t *)tag; 291 292 if (le16toh(tag->id) != id) 293 return (EINVAL); 294 295 for (i = 0; i < 16; i++) 296 cksum = cksum + itag[i]; 297 cksum = cksum - itag[4]; 298 299 if (cksum == tag->cksum) 300 return (0); 301 302 return (EINVAL); 303 } 304 305 static int 306 udf_mountfs(struct vnode *devvp, struct mount *mp) 307 { 308 struct buf *bp = NULL; 309 struct cdev *dev; 310 struct anchor_vdp avdp; 311 struct udf_mnt *udfmp = NULL; 312 struct part_desc *pd; 313 struct logvol_desc *lvd; 314 struct fileset_desc *fsd; 315 struct file_entry *root_fentry; 316 uint32_t sector, size, mvds_start, mvds_end; 317 uint32_t logical_secsize; 318 uint32_t fsd_offset = 0; 319 uint16_t part_num = 0, fsd_part = 0; 320 int error = EINVAL; 321 int logvol_found = 0, part_found = 0, fsd_found = 0; 322 int bsize; 323 struct g_consumer *cp; 324 struct bufobj *bo; 325 326 dev = devvp->v_rdev; 327 dev_ref(dev); 328 g_topology_lock(); 329 error = g_vfs_open(devvp, &cp, "udf", 0); 330 g_topology_unlock(); 331 VOP_UNLOCK(devvp, 0); 332 if (error) 333 goto bail; 334 335 bo = &devvp->v_bufobj; 336 337 if (devvp->v_rdev->si_iosize_max != 0) 338 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 339 if (mp->mnt_iosize_max > MAXPHYS) 340 mp->mnt_iosize_max = MAXPHYS; 341 342 /* XXX: should be M_WAITOK */ 343 udfmp = malloc(sizeof(struct udf_mnt), M_UDFMOUNT, 344 M_NOWAIT | M_ZERO); 345 if (udfmp == NULL) { 346 printf("Cannot allocate UDF mount struct\n"); 347 error = ENOMEM; 348 goto bail; 349 } 350 351 mp->mnt_data = udfmp; 352 mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev); 353 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 354 MNT_ILOCK(mp); 355 mp->mnt_flag |= MNT_LOCAL; 356 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED; 357 MNT_IUNLOCK(mp); 358 udfmp->im_mountp = mp; 359 udfmp->im_dev = dev; 360 udfmp->im_devvp = devvp; 361 udfmp->im_d2l = NULL; 362 udfmp->im_cp = cp; 363 udfmp->im_bo = bo; 364 365 #if 0 366 udfmp->im_l2d = NULL; 367 #endif 368 /* 369 * The UDF specification defines a logical sectorsize of 2048 370 * for DVD media. 371 */ 372 logical_secsize = 2048; 373 374 if (((logical_secsize % cp->provider->sectorsize) != 0) || 375 (logical_secsize < cp->provider->sectorsize)) { 376 error = EINVAL; 377 goto bail; 378 } 379 380 bsize = cp->provider->sectorsize; 381 382 /* 383 * Get the Anchor Volume Descriptor Pointer from sector 256. 384 * XXX Should also check sector n - 256, n, and 512. 385 */ 386 sector = 256; 387 if ((error = bread(devvp, sector * btodb(logical_secsize), bsize, 388 NOCRED, &bp)) != 0) 389 goto bail; 390 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 391 goto bail; 392 393 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 394 brelse(bp); 395 bp = NULL; 396 397 /* 398 * Extract the Partition Descriptor and Logical Volume Descriptor 399 * from the Volume Descriptor Sequence. 400 * XXX Should we care about the partition type right now? 401 * XXX What about multiple partitions? 402 */ 403 mvds_start = le32toh(avdp.main_vds_ex.loc); 404 mvds_end = mvds_start + (le32toh(avdp.main_vds_ex.len) - 1) / bsize; 405 for (sector = mvds_start; sector < mvds_end; sector++) { 406 if ((error = bread(devvp, sector * btodb(logical_secsize), 407 bsize, NOCRED, &bp)) != 0) { 408 printf("Can't read sector %d of VDS\n", sector); 409 goto bail; 410 } 411 lvd = (struct logvol_desc *)bp->b_data; 412 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 413 udfmp->bsize = le32toh(lvd->lb_size); 414 udfmp->bmask = udfmp->bsize - 1; 415 udfmp->bshift = ffs(udfmp->bsize) - 1; 416 fsd_part = le16toh(lvd->_lvd_use.fsd_loc.loc.part_num); 417 fsd_offset = le32toh(lvd->_lvd_use.fsd_loc.loc.lb_num); 418 if (udf_find_partmaps(udfmp, lvd)) 419 break; 420 logvol_found = 1; 421 } 422 pd = (struct part_desc *)bp->b_data; 423 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 424 part_found = 1; 425 part_num = le16toh(pd->part_num); 426 udfmp->part_len = le32toh(pd->part_len); 427 udfmp->part_start = le32toh(pd->start_loc); 428 } 429 430 brelse(bp); 431 bp = NULL; 432 if ((part_found) && (logvol_found)) 433 break; 434 } 435 436 if (!part_found || !logvol_found) { 437 error = EINVAL; 438 goto bail; 439 } 440 441 if (fsd_part != part_num) { 442 printf("FSD does not lie within the partition!\n"); 443 error = EINVAL; 444 goto bail; 445 } 446 447 448 /* 449 * Grab the Fileset Descriptor 450 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 451 * me in the right direction here. 452 */ 453 sector = udfmp->part_start + fsd_offset; 454 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 455 printf("Cannot read sector %d of FSD\n", sector); 456 goto bail; 457 } 458 fsd = (struct fileset_desc *)bp->b_data; 459 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 460 fsd_found = 1; 461 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 462 sizeof(struct long_ad)); 463 } 464 465 brelse(bp); 466 bp = NULL; 467 468 if (!fsd_found) { 469 printf("Couldn't find the fsd\n"); 470 error = EINVAL; 471 goto bail; 472 } 473 474 /* 475 * Find the file entry for the root directory. 476 */ 477 sector = le32toh(udfmp->root_icb.loc.lb_num) + udfmp->part_start; 478 size = le32toh(udfmp->root_icb.len); 479 if ((error = udf_readdevblks(udfmp, sector, size, &bp)) != 0) { 480 printf("Cannot read sector %d\n", sector); 481 goto bail; 482 } 483 484 root_fentry = (struct file_entry *)bp->b_data; 485 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 486 printf("Invalid root file entry!\n"); 487 goto bail; 488 } 489 490 brelse(bp); 491 bp = NULL; 492 493 return 0; 494 495 bail: 496 if (udfmp != NULL) 497 free(udfmp, M_UDFMOUNT); 498 if (bp != NULL) 499 brelse(bp); 500 if (cp != NULL) { 501 g_topology_lock(); 502 g_vfs_close(cp); 503 g_topology_unlock(); 504 } 505 dev_rel(dev); 506 return error; 507 }; 508 509 static int 510 udf_unmount(struct mount *mp, int mntflags) 511 { 512 struct udf_mnt *udfmp; 513 int error, flags = 0; 514 515 udfmp = VFSTOUDFFS(mp); 516 517 if (mntflags & MNT_FORCE) 518 flags |= FORCECLOSE; 519 520 if ((error = vflush(mp, 0, flags, curthread))) 521 return (error); 522 523 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 524 if (udfmp->im_d2l) 525 udf_iconv->close(udfmp->im_d2l); 526 #if 0 527 if (udfmp->im_l2d) 528 udf_iconv->close(udfmp->im_l2d); 529 #endif 530 } 531 532 g_topology_lock(); 533 g_vfs_close(udfmp->im_cp); 534 g_topology_unlock(); 535 vrele(udfmp->im_devvp); 536 dev_rel(udfmp->im_dev); 537 538 if (udfmp->s_table != NULL) 539 free(udfmp->s_table, M_UDFMOUNT); 540 541 free(udfmp, M_UDFMOUNT); 542 543 mp->mnt_data = NULL; 544 MNT_ILOCK(mp); 545 mp->mnt_flag &= ~MNT_LOCAL; 546 MNT_IUNLOCK(mp); 547 548 return (0); 549 } 550 551 static int 552 udf_root(struct mount *mp, int flags, struct vnode **vpp) 553 { 554 struct udf_mnt *udfmp; 555 ino_t id; 556 557 udfmp = VFSTOUDFFS(mp); 558 559 id = udf_getid(&udfmp->root_icb); 560 561 return (udf_vget(mp, id, flags, vpp)); 562 } 563 564 static int 565 udf_statfs(struct mount *mp, struct statfs *sbp) 566 { 567 struct udf_mnt *udfmp; 568 569 udfmp = VFSTOUDFFS(mp); 570 571 sbp->f_bsize = udfmp->bsize; 572 sbp->f_iosize = udfmp->bsize; 573 sbp->f_blocks = udfmp->part_len; 574 sbp->f_bfree = 0; 575 sbp->f_bavail = 0; 576 sbp->f_files = 0; 577 sbp->f_ffree = 0; 578 return 0; 579 } 580 581 int 582 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 583 { 584 struct buf *bp; 585 struct vnode *devvp; 586 struct udf_mnt *udfmp; 587 struct thread *td; 588 struct vnode *vp; 589 struct udf_node *unode; 590 struct file_entry *fe; 591 uint32_t lea, lad; 592 int error, sector, size; 593 594 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 595 if (error || *vpp != NULL) 596 return (error); 597 598 /* 599 * We must promote to an exclusive lock for vnode creation. This 600 * can happen if lookup is passed LOCKSHARED. 601 */ 602 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 603 flags &= ~LK_TYPE_MASK; 604 flags |= LK_EXCLUSIVE; 605 } 606 607 /* 608 * We do not lock vnode creation as it is believed to be too 609 * expensive for such rare case as simultaneous creation of vnode 610 * for same ino by different processes. We just allow them to race 611 * and check later to decide who wins. Let the race begin! 612 */ 613 614 td = curthread; 615 udfmp = VFSTOUDFFS(mp); 616 617 unode = uma_zalloc(udf_zone_node, M_WAITOK | M_ZERO); 618 619 if ((error = udf_allocv(mp, &vp, td))) { 620 printf("Error from udf_allocv\n"); 621 uma_zfree(udf_zone_node, unode); 622 return (error); 623 } 624 625 unode->i_vnode = vp; 626 unode->hash_id = ino; 627 unode->udfmp = udfmp; 628 vp->v_data = unode; 629 630 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 631 error = insmntque(vp, mp); 632 if (error != 0) { 633 uma_zfree(udf_zone_node, unode); 634 return (error); 635 } 636 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL); 637 if (error || *vpp != NULL) 638 return (error); 639 640 /* 641 * Copy in the file entry. Per the spec, the size can only be 1 block. 642 */ 643 sector = ino + udfmp->part_start; 644 devvp = udfmp->im_devvp; 645 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 646 printf("Cannot read sector %d\n", sector); 647 goto error; 648 } 649 650 /* 651 * File entry length validation. 652 */ 653 fe = (struct file_entry *)bp->b_data; 654 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 655 printf("Invalid file entry!\n"); 656 error = ENOMEM; 657 goto error; 658 } 659 lea = le32toh(fe->l_ea); 660 lad = le32toh(fe->l_ad); 661 if (lea > udfmp->bsize || lad > udfmp->bsize) { 662 printf("Invalid EA and AD lengths %u, %u\n", lea, lad); 663 error = EIO; 664 goto error; 665 } 666 size = UDF_FENTRY_SIZE + lea + lad; 667 if (size > udfmp->bsize) { 668 printf("Invalid file entry size %u\n", size); 669 error = EIO; 670 goto error; 671 } 672 673 unode->fentry = malloc(size, M_UDFFENTRY, M_NOWAIT | M_ZERO); 674 if (unode->fentry == NULL) { 675 printf("Cannot allocate file entry block\n"); 676 error = ENOMEM; 677 goto error; 678 } 679 680 bcopy(bp->b_data, unode->fentry, size); 681 682 brelse(bp); 683 bp = NULL; 684 685 switch (unode->fentry->icbtag.file_type) { 686 default: 687 vp->v_type = VBAD; 688 break; 689 case 4: 690 vp->v_type = VDIR; 691 break; 692 case 5: 693 vp->v_type = VREG; 694 break; 695 case 6: 696 vp->v_type = VBLK; 697 break; 698 case 7: 699 vp->v_type = VCHR; 700 break; 701 case 9: 702 vp->v_type = VFIFO; 703 vp->v_op = &udf_fifoops; 704 break; 705 case 10: 706 vp->v_type = VSOCK; 707 break; 708 case 12: 709 vp->v_type = VLNK; 710 break; 711 } 712 713 if (vp->v_type != VFIFO) 714 VN_LOCK_ASHARE(vp); 715 716 if (ino == udf_getid(&udfmp->root_icb)) 717 vp->v_vflag |= VV_ROOT; 718 719 *vpp = vp; 720 721 return (0); 722 723 error: 724 vgone(vp); 725 vput(vp); 726 brelse(bp); 727 *vpp = NULL; 728 return (error); 729 } 730 731 static int 732 udf_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp) 733 { 734 struct ifid *ifhp; 735 struct vnode *nvp; 736 struct udf_node *np; 737 off_t fsize; 738 int error; 739 740 ifhp = (struct ifid *)fhp; 741 742 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 743 *vpp = NULLVP; 744 return (error); 745 } 746 747 np = VTON(nvp); 748 fsize = le64toh(np->fentry->inf_len); 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 }
Cache object: 83b5fcad7ca8890f91cec1d4a5c94d08
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