Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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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: releng/8.4/sys/fs/udf/udf_vfsops.c 191990 2009-05-11 15:33:26Z attilio $ 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 = 0; 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 DROP_GIANT(); 329 g_topology_lock(); 330 error = g_vfs_open(devvp, &cp, "udf", 0); 331 g_topology_unlock(); 332 PICKUP_GIANT(); 333 VOP_UNLOCK(devvp, 0); 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_MPSAFE | MNTK_LOOKUP_SHARED | 359 MNTK_EXTENDED_SHARED; 360 MNT_IUNLOCK(mp); 361 udfmp->im_mountp = mp; 362 udfmp->im_dev = dev; 363 udfmp->im_devvp = devvp; 364 udfmp->im_d2l = NULL; 365 udfmp->im_cp = cp; 366 udfmp->im_bo = bo; 367 368 #if 0 369 udfmp->im_l2d = NULL; 370 #endif 371 /* 372 * The UDF specification defines a logical sectorsize of 2048 373 * for DVD media. 374 */ 375 logical_secsize = 2048; 376 377 if (((logical_secsize % cp->provider->sectorsize) != 0) || 378 (logical_secsize < cp->provider->sectorsize)) { 379 error = EINVAL; 380 goto bail; 381 } 382 383 bsize = cp->provider->sectorsize; 384 385 /* 386 * Get the Anchor Volume Descriptor Pointer from sector 256. 387 * XXX Should also check sector n - 256, n, and 512. 388 */ 389 sector = 256; 390 if ((error = bread(devvp, sector * btodb(logical_secsize), bsize, 391 NOCRED, &bp)) != 0) 392 goto bail; 393 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 394 goto bail; 395 396 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 397 brelse(bp); 398 bp = NULL; 399 400 /* 401 * Extract the Partition Descriptor and Logical Volume Descriptor 402 * from the Volume Descriptor Sequence. 403 * XXX Should we care about the partition type right now? 404 * XXX What about multiple partitions? 405 */ 406 mvds_start = le32toh(avdp.main_vds_ex.loc); 407 mvds_end = mvds_start + (le32toh(avdp.main_vds_ex.len) - 1) / bsize; 408 for (sector = mvds_start; sector < mvds_end; sector++) { 409 if ((error = bread(devvp, sector * btodb(logical_secsize), 410 bsize, NOCRED, &bp)) != 0) { 411 printf("Can't read sector %d of VDS\n", sector); 412 goto bail; 413 } 414 lvd = (struct logvol_desc *)bp->b_data; 415 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 416 udfmp->bsize = le32toh(lvd->lb_size); 417 udfmp->bmask = udfmp->bsize - 1; 418 udfmp->bshift = ffs(udfmp->bsize) - 1; 419 fsd_part = le16toh(lvd->_lvd_use.fsd_loc.loc.part_num); 420 fsd_offset = le32toh(lvd->_lvd_use.fsd_loc.loc.lb_num); 421 if (udf_find_partmaps(udfmp, lvd)) 422 break; 423 logvol_found = 1; 424 } 425 pd = (struct part_desc *)bp->b_data; 426 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 427 part_found = 1; 428 part_num = le16toh(pd->part_num); 429 udfmp->part_len = le32toh(pd->part_len); 430 udfmp->part_start = le32toh(pd->start_loc); 431 } 432 433 brelse(bp); 434 bp = NULL; 435 if ((part_found) && (logvol_found)) 436 break; 437 } 438 439 if (!part_found || !logvol_found) { 440 error = EINVAL; 441 goto bail; 442 } 443 444 if (fsd_part != part_num) { 445 printf("FSD does not lie within the partition!\n"); 446 error = EINVAL; 447 goto bail; 448 } 449 450 451 /* 452 * Grab the Fileset Descriptor 453 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 454 * me in the right direction here. 455 */ 456 sector = udfmp->part_start + fsd_offset; 457 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 458 printf("Cannot read sector %d of FSD\n", sector); 459 goto bail; 460 } 461 fsd = (struct fileset_desc *)bp->b_data; 462 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 463 fsd_found = 1; 464 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 465 sizeof(struct long_ad)); 466 } 467 468 brelse(bp); 469 bp = NULL; 470 471 if (!fsd_found) { 472 printf("Couldn't find the fsd\n"); 473 error = EINVAL; 474 goto bail; 475 } 476 477 /* 478 * Find the file entry for the root directory. 479 */ 480 sector = le32toh(udfmp->root_icb.loc.lb_num) + udfmp->part_start; 481 size = le32toh(udfmp->root_icb.len); 482 if ((error = udf_readdevblks(udfmp, sector, size, &bp)) != 0) { 483 printf("Cannot read sector %d\n", sector); 484 goto bail; 485 } 486 487 root_fentry = (struct file_entry *)bp->b_data; 488 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 489 printf("Invalid root file entry!\n"); 490 goto bail; 491 } 492 493 brelse(bp); 494 bp = NULL; 495 496 return 0; 497 498 bail: 499 if (udfmp != NULL) 500 free(udfmp, M_UDFMOUNT); 501 if (bp != NULL) 502 brelse(bp); 503 if (cp != NULL) { 504 DROP_GIANT(); 505 g_topology_lock(); 506 g_vfs_close(cp); 507 g_topology_unlock(); 508 PICKUP_GIANT(); 509 } 510 dev_rel(dev); 511 return error; 512 }; 513 514 static int 515 udf_unmount(struct mount *mp, int mntflags) 516 { 517 struct udf_mnt *udfmp; 518 int error, flags = 0; 519 520 udfmp = VFSTOUDFFS(mp); 521 522 if (mntflags & MNT_FORCE) 523 flags |= FORCECLOSE; 524 525 if ((error = vflush(mp, 0, flags, curthread))) 526 return (error); 527 528 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 529 if (udfmp->im_d2l) 530 udf_iconv->close(udfmp->im_d2l); 531 #if 0 532 if (udfmp->im_l2d) 533 udf_iconv->close(udfmp->im_l2d); 534 #endif 535 } 536 537 DROP_GIANT(); 538 g_topology_lock(); 539 g_vfs_close(udfmp->im_cp); 540 g_topology_unlock(); 541 PICKUP_GIANT(); 542 vrele(udfmp->im_devvp); 543 dev_rel(udfmp->im_dev); 544 545 if (udfmp->s_table != NULL) 546 free(udfmp->s_table, M_UDFMOUNT); 547 548 free(udfmp, M_UDFMOUNT); 549 550 mp->mnt_data = NULL; 551 MNT_ILOCK(mp); 552 mp->mnt_flag &= ~MNT_LOCAL; 553 MNT_IUNLOCK(mp); 554 555 return (0); 556 } 557 558 static int 559 udf_root(struct mount *mp, int flags, struct vnode **vpp) 560 { 561 struct udf_mnt *udfmp; 562 ino_t id; 563 564 udfmp = VFSTOUDFFS(mp); 565 566 id = udf_getid(&udfmp->root_icb); 567 568 return (udf_vget(mp, id, flags, vpp)); 569 } 570 571 static int 572 udf_statfs(struct mount *mp, struct statfs *sbp) 573 { 574 struct udf_mnt *udfmp; 575 576 udfmp = VFSTOUDFFS(mp); 577 578 sbp->f_bsize = udfmp->bsize; 579 sbp->f_iosize = udfmp->bsize; 580 sbp->f_blocks = udfmp->part_len; 581 sbp->f_bfree = 0; 582 sbp->f_bavail = 0; 583 sbp->f_files = 0; 584 sbp->f_ffree = 0; 585 return 0; 586 } 587 588 int 589 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 590 { 591 struct buf *bp; 592 struct vnode *devvp; 593 struct udf_mnt *udfmp; 594 struct thread *td; 595 struct vnode *vp; 596 struct udf_node *unode; 597 struct file_entry *fe; 598 int error, sector, size; 599 600 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 601 if (error || *vpp != NULL) 602 return (error); 603 604 /* 605 * We must promote to an exclusive lock for vnode creation. This 606 * can happen if lookup is passed LOCKSHARED. 607 */ 608 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 609 flags &= ~LK_TYPE_MASK; 610 flags |= LK_EXCLUSIVE; 611 } 612 613 /* 614 * We do not lock vnode creation as it is believed to be too 615 * expensive for such rare case as simultaneous creation of vnode 616 * for same ino by different processes. We just allow them to race 617 * and check later to decide who wins. Let the race begin! 618 */ 619 620 td = curthread; 621 udfmp = VFSTOUDFFS(mp); 622 623 unode = uma_zalloc(udf_zone_node, M_WAITOK | M_ZERO); 624 625 if ((error = udf_allocv(mp, &vp, td))) { 626 printf("Error from udf_allocv\n"); 627 uma_zfree(udf_zone_node, unode); 628 return (error); 629 } 630 631 unode->i_vnode = vp; 632 unode->hash_id = ino; 633 unode->udfmp = udfmp; 634 vp->v_data = unode; 635 636 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 637 error = insmntque(vp, mp); 638 if (error != 0) { 639 uma_zfree(udf_zone_node, unode); 640 return (error); 641 } 642 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL); 643 if (error || *vpp != NULL) 644 return (error); 645 646 /* 647 * Copy in the file entry. Per the spec, the size can only be 1 block. 648 */ 649 sector = ino + udfmp->part_start; 650 devvp = udfmp->im_devvp; 651 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 652 printf("Cannot read sector %d\n", sector); 653 vgone(vp); 654 vput(vp); 655 brelse(bp); 656 *vpp = NULL; 657 return (error); 658 } 659 660 fe = (struct file_entry *)bp->b_data; 661 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 662 printf("Invalid file entry!\n"); 663 vgone(vp); 664 vput(vp); 665 brelse(bp); 666 *vpp = NULL; 667 return (ENOMEM); 668 } 669 size = UDF_FENTRY_SIZE + le32toh(fe->l_ea) + le32toh(fe->l_ad); 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 vgone(vp); 674 vput(vp); 675 brelse(bp); 676 *vpp = NULL; 677 return (ENOMEM); 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 } 723 724 static int 725 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 726 { 727 struct ifid *ifhp; 728 struct vnode *nvp; 729 struct udf_node *np; 730 off_t fsize; 731 int error; 732 733 ifhp = (struct ifid *)fhp; 734 735 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 736 *vpp = NULLVP; 737 return (error); 738 } 739 740 np = VTON(nvp); 741 fsize = le64toh(np->fentry->inf_len); 742 743 *vpp = nvp; 744 vnode_create_vobject(*vpp, fsize, curthread); 745 return (0); 746 } 747 748 static int 749 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 750 { 751 struct part_map_spare *pms; 752 struct regid *pmap_id; 753 struct buf *bp; 754 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 755 int i, k, ptype, psize, error; 756 uint8_t *pmap = (uint8_t *) &lvd->maps[0]; 757 758 for (i = 0; i < le32toh(lvd->n_pm); i++) { 759 ptype = pmap[0]; 760 psize = pmap[1]; 761 if (((ptype != 1) && (ptype != 2)) || 762 ((psize != UDF_PMAP_TYPE1_SIZE) && 763 (psize != UDF_PMAP_TYPE2_SIZE))) { 764 printf("Invalid partition map found\n"); 765 return (1); 766 } 767 768 if (ptype == 1) { 769 /* Type 1 map. We don't care */ 770 pmap += UDF_PMAP_TYPE1_SIZE; 771 continue; 772 } 773 774 /* Type 2 map. Gotta find out the details */ 775 pmap_id = (struct regid *)&pmap[4]; 776 bzero(®id_id[0], UDF_REGID_ID_SIZE); 777 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 778 779 if (bcmp(®id_id[0], "*UDF Sparable Partition", 780 UDF_REGID_ID_SIZE)) { 781 printf("Unsupported partition map: %s\n", ®id_id[0]); 782 return (1); 783 } 784 785 pms = (struct part_map_spare *)pmap; 786 pmap += UDF_PMAP_TYPE2_SIZE; 787 udfmp->s_table = malloc(le32toh(pms->st_size), 788 M_UDFMOUNT, M_NOWAIT | M_ZERO); 789 if (udfmp->s_table == NULL) 790 return (ENOMEM); 791 792 /* Calculate the number of sectors per packet. */ 793 /* XXX Logical or physical? */ 794 udfmp->p_sectors = le16toh(pms->packet_len) / udfmp->bsize; 795 796 /* 797 * XXX If reading the first Sparing Table fails, should look 798 * for another table. 799 */ 800 if ((error = udf_readdevblks(udfmp, le32toh(pms->st_loc[0]), 801 le32toh(pms->st_size), &bp)) != 0) { 802 if (bp != NULL) 803 brelse(bp); 804 printf("Failed to read Sparing Table at sector %d\n", 805 le32toh(pms->st_loc[0])); 806 free(udfmp->s_table, M_UDFMOUNT); 807 return (error); 808 } 809 bcopy(bp->b_data, udfmp->s_table, le32toh(pms->st_size)); 810 brelse(bp); 811 812 if (udf_checktag(&udfmp->s_table->tag, 0)) { 813 printf("Invalid sparing table found\n"); 814 free(udfmp->s_table, M_UDFMOUNT); 815 return (EINVAL); 816 } 817 818 /* See how many valid entries there are here. The list is 819 * supposed to be sorted. 0xfffffff0 and higher are not valid 820 */ 821 for (k = 0; k < le16toh(udfmp->s_table->rt_l); k++) { 822 udfmp->s_table_entries = k; 823 if (le32toh(udfmp->s_table->entries[k].org) >= 824 0xfffffff0) 825 break; 826 } 827 } 828 829 return (0); 830 }
Cache object: 397f5a2685c938b4d71a1fe22b773444
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