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 *, struct thread *); 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, struct thread *td) 190 { 191 struct vnode *devvp; /* vnode of the mount device */ 192 struct udf_mnt *imp = 0; 193 struct vfsoptlist *opts; 194 char *fspec, *cs_disk, *cs_local; 195 int error, len, *udf_flags; 196 struct nameidata nd, *ndp = &nd; 197 198 opts = mp->mnt_optnew; 199 200 /* 201 * Unconditionally mount as read-only. 202 */ 203 MNT_ILOCK(mp); 204 mp->mnt_flag |= MNT_RDONLY; 205 MNT_IUNLOCK(mp); 206 207 /* 208 * No root filesystem support. Probably not a big deal, since the 209 * bootloader doesn't understand UDF. 210 */ 211 if (mp->mnt_flag & MNT_ROOTFS) 212 return (ENOTSUP); 213 214 fspec = NULL; 215 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 216 if (!error && fspec[len - 1] != '\0') 217 return (EINVAL); 218 219 if (mp->mnt_flag & MNT_UPDATE) { 220 return (0); 221 } 222 223 /* Check that the mount device exists */ 224 if (fspec == NULL) 225 return (EINVAL); 226 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 227 if ((error = namei(ndp))) 228 return (error); 229 NDFREE(ndp, NDF_ONLY_PNBUF); 230 devvp = ndp->ni_vp; 231 232 if (vn_isdisk(devvp, &error) == 0) { 233 vput(devvp); 234 return (error); 235 } 236 237 /* Check the access rights on the mount device */ 238 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td); 239 if (error) 240 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 241 if (error) { 242 vput(devvp); 243 return (error); 244 } 245 246 if ((error = udf_mountfs(devvp, mp, td))) { 247 vrele(devvp); 248 return (error); 249 } 250 251 imp = VFSTOUDFFS(mp); 252 253 udf_flags = NULL; 254 error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len); 255 if (error || len != sizeof(int)) 256 return (EINVAL); 257 imp->im_flags = *udf_flags; 258 259 if (imp->im_flags & UDFMNT_KICONV && udf_iconv) { 260 cs_disk = NULL; 261 error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len); 262 if (!error && cs_disk[len - 1] != '\0') 263 return (EINVAL); 264 cs_local = NULL; 265 error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len); 266 if (!error && cs_local[len - 1] != '\0') 267 return (EINVAL); 268 udf_iconv->open(cs_local, cs_disk, &imp->im_d2l); 269 #if 0 270 udf_iconv->open(cs_disk, cs_local, &imp->im_l2d); 271 #endif 272 } 273 274 vfs_mountedfrom(mp, fspec); 275 return 0; 276 }; 277 278 /* 279 * Check the descriptor tag for both the correct id and correct checksum. 280 * Return zero if all is good, EINVAL if not. 281 */ 282 int 283 udf_checktag(struct desc_tag *tag, uint16_t id) 284 { 285 uint8_t *itag; 286 uint8_t i, cksum = 0; 287 288 itag = (uint8_t *)tag; 289 290 if (le16toh(tag->id) != id) 291 return (EINVAL); 292 293 for (i = 0; i < 16; i++) 294 cksum = cksum + itag[i]; 295 cksum = cksum - itag[4]; 296 297 if (cksum == tag->cksum) 298 return (0); 299 300 return (EINVAL); 301 } 302 303 static int 304 udf_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td) 305 { 306 struct buf *bp = NULL; 307 struct cdev *dev; 308 struct anchor_vdp avdp; 309 struct udf_mnt *udfmp = NULL; 310 struct part_desc *pd; 311 struct logvol_desc *lvd; 312 struct fileset_desc *fsd; 313 struct file_entry *root_fentry; 314 uint32_t sector, size, mvds_start, mvds_end; 315 uint32_t logical_secsize; 316 uint32_t fsd_offset = 0; 317 uint16_t part_num = 0, fsd_part = 0; 318 int error = EINVAL; 319 int logvol_found = 0, part_found = 0, fsd_found = 0; 320 int bsize; 321 struct g_consumer *cp; 322 struct bufobj *bo; 323 324 dev = devvp->v_rdev; 325 dev_ref(dev); 326 DROP_GIANT(); 327 g_topology_lock(); 328 error = g_vfs_open(devvp, &cp, "udf", 0); 329 g_topology_unlock(); 330 PICKUP_GIANT(); 331 VOP_UNLOCK(devvp, 0, td); 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 MALLOC(udfmp, struct udf_mnt *, 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 = (qaddr_t)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_MPSAFE | MNTK_LOOKUP_SHARED | 357 MNTK_EXTENDED_SHARED; 358 MNT_IUNLOCK(mp); 359 udfmp->im_mountp = mp; 360 udfmp->im_dev = dev; 361 udfmp->im_devvp = devvp; 362 udfmp->im_d2l = NULL; 363 udfmp->im_cp = cp; 364 udfmp->im_bo = bo; 365 366 #if 0 367 udfmp->im_l2d = NULL; 368 #endif 369 /* 370 * The UDF specification defines a logical sectorsize of 2048 371 * for DVD media. 372 */ 373 logical_secsize = 2048; 374 375 if (((logical_secsize % cp->provider->sectorsize) != 0) || 376 (logical_secsize < cp->provider->sectorsize)) { 377 error = EINVAL; 378 goto bail; 379 } 380 381 bsize = cp->provider->sectorsize; 382 383 /* 384 * Get the Anchor Volume Descriptor Pointer from sector 256. 385 * XXX Should also check sector n - 256, n, and 512. 386 */ 387 sector = 256; 388 if ((error = bread(devvp, sector * btodb(logical_secsize), bsize, 389 NOCRED, &bp)) != 0) 390 goto bail; 391 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 392 goto bail; 393 394 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 395 brelse(bp); 396 bp = NULL; 397 398 /* 399 * Extract the Partition Descriptor and Logical Volume Descriptor 400 * from the Volume Descriptor Sequence. 401 * XXX Should we care about the partition type right now? 402 * XXX What about multiple partitions? 403 */ 404 mvds_start = le32toh(avdp.main_vds_ex.loc); 405 mvds_end = mvds_start + (le32toh(avdp.main_vds_ex.len) - 1) / bsize; 406 for (sector = mvds_start; sector < mvds_end; sector++) { 407 if ((error = bread(devvp, sector * btodb(logical_secsize), 408 bsize, NOCRED, &bp)) != 0) { 409 printf("Can't read sector %d of VDS\n", sector); 410 goto bail; 411 } 412 lvd = (struct logvol_desc *)bp->b_data; 413 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 414 udfmp->bsize = le32toh(lvd->lb_size); 415 udfmp->bmask = udfmp->bsize - 1; 416 udfmp->bshift = ffs(udfmp->bsize) - 1; 417 fsd_part = le16toh(lvd->_lvd_use.fsd_loc.loc.part_num); 418 fsd_offset = le32toh(lvd->_lvd_use.fsd_loc.loc.lb_num); 419 if (udf_find_partmaps(udfmp, lvd)) 420 break; 421 logvol_found = 1; 422 } 423 pd = (struct part_desc *)bp->b_data; 424 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 425 part_found = 1; 426 part_num = le16toh(pd->part_num); 427 udfmp->part_len = le32toh(pd->part_len); 428 udfmp->part_start = le32toh(pd->start_loc); 429 } 430 431 brelse(bp); 432 bp = NULL; 433 if ((part_found) && (logvol_found)) 434 break; 435 } 436 437 if (!part_found || !logvol_found) { 438 error = EINVAL; 439 goto bail; 440 } 441 442 if (fsd_part != part_num) { 443 printf("FSD does not lie within the partition!\n"); 444 error = EINVAL; 445 goto bail; 446 } 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 DROP_GIANT(); 503 g_topology_lock(); 504 g_vfs_close(cp, td); 505 g_topology_unlock(); 506 PICKUP_GIANT(); 507 } 508 dev_rel(dev); 509 return error; 510 }; 511 512 static int 513 udf_unmount(struct mount *mp, int mntflags, struct thread *td) 514 { 515 struct udf_mnt *udfmp; 516 int error, flags = 0; 517 518 udfmp = VFSTOUDFFS(mp); 519 520 if (mntflags & MNT_FORCE) 521 flags |= FORCECLOSE; 522 523 if ((error = vflush(mp, 0, flags, td))) 524 return (error); 525 526 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 527 if (udfmp->im_d2l) 528 udf_iconv->close(udfmp->im_d2l); 529 #if 0 530 if (udfmp->im_l2d) 531 udf_iconv->close(udfmp->im_l2d); 532 #endif 533 } 534 535 DROP_GIANT(); 536 g_topology_lock(); 537 g_vfs_close(udfmp->im_cp, td); 538 g_topology_unlock(); 539 PICKUP_GIANT(); 540 vrele(udfmp->im_devvp); 541 dev_rel(udfmp->im_dev); 542 543 if (udfmp->s_table != NULL) 544 FREE(udfmp->s_table, M_UDFMOUNT); 545 546 FREE(udfmp, M_UDFMOUNT); 547 548 mp->mnt_data = (qaddr_t)0; 549 MNT_ILOCK(mp); 550 mp->mnt_flag &= ~MNT_LOCAL; 551 MNT_IUNLOCK(mp); 552 553 return (0); 554 } 555 556 static int 557 udf_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td) 558 { 559 struct udf_mnt *udfmp; 560 ino_t id; 561 562 udfmp = VFSTOUDFFS(mp); 563 564 id = udf_getid(&udfmp->root_icb); 565 566 return (udf_vget(mp, id, flags, vpp)); 567 } 568 569 static int 570 udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 571 { 572 struct udf_mnt *udfmp; 573 574 udfmp = VFSTOUDFFS(mp); 575 576 sbp->f_bsize = udfmp->bsize; 577 sbp->f_iosize = udfmp->bsize; 578 sbp->f_blocks = udfmp->part_len; 579 sbp->f_bfree = 0; 580 sbp->f_bavail = 0; 581 sbp->f_files = 0; 582 sbp->f_ffree = 0; 583 return 0; 584 } 585 586 int 587 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 588 { 589 struct buf *bp; 590 struct vnode *devvp; 591 struct udf_mnt *udfmp; 592 struct thread *td; 593 struct vnode *vp; 594 struct udf_node *unode; 595 struct file_entry *fe; 596 int error, sector, size; 597 598 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 599 if (error || *vpp != NULL) 600 return (error); 601 602 /* 603 * We must promote to an exclusive lock for vnode creation. This 604 * can happen if lookup is passed LOCKSHARED. 605 */ 606 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 607 flags &= ~LK_TYPE_MASK; 608 flags |= LK_EXCLUSIVE; 609 } 610 611 /* 612 * We do not lock vnode creation as it is believed to be too 613 * expensive for such rare case as simultaneous creation of vnode 614 * for same ino by different processes. We just allow them to race 615 * and check later to decide who wins. Let the race begin! 616 */ 617 618 td = curthread; 619 udfmp = VFSTOUDFFS(mp); 620 621 unode = uma_zalloc(udf_zone_node, M_WAITOK | M_ZERO); 622 623 if ((error = udf_allocv(mp, &vp, td))) { 624 printf("Error from udf_allocv\n"); 625 uma_zfree(udf_zone_node, unode); 626 return (error); 627 } 628 629 unode->i_vnode = vp; 630 unode->hash_id = ino; 631 unode->udfmp = udfmp; 632 vp->v_data = unode; 633 634 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL, td); 635 error = insmntque(vp, mp); 636 if (error != 0) { 637 uma_zfree(udf_zone_node, unode); 638 return (error); 639 } 640 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL); 641 if (error || *vpp != NULL) 642 return (error); 643 644 /* 645 * Copy in the file entry. Per the spec, the size can only be 1 block. 646 */ 647 sector = ino + udfmp->part_start; 648 devvp = udfmp->im_devvp; 649 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 650 printf("Cannot read sector %d\n", sector); 651 vgone(vp); 652 vput(vp); 653 brelse(bp); 654 *vpp = NULL; 655 return (error); 656 } 657 658 fe = (struct file_entry *)bp->b_data; 659 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 660 printf("Invalid file entry!\n"); 661 vgone(vp); 662 vput(vp); 663 brelse(bp); 664 *vpp = NULL; 665 return (ENOMEM); 666 } 667 size = UDF_FENTRY_SIZE + le32toh(fe->l_ea) + le32toh(fe->l_ad); 668 MALLOC(unode->fentry, struct file_entry *, size, M_UDFFENTRY, 669 M_NOWAIT | M_ZERO); 670 if (unode->fentry == NULL) { 671 printf("Cannot allocate file entry block\n"); 672 vgone(vp); 673 vput(vp); 674 brelse(bp); 675 *vpp = NULL; 676 return (ENOMEM); 677 } 678 679 bcopy(bp->b_data, unode->fentry, size); 680 681 brelse(bp); 682 bp = NULL; 683 684 switch (unode->fentry->icbtag.file_type) { 685 default: 686 vp->v_type = VBAD; 687 break; 688 case 4: 689 vp->v_type = VDIR; 690 break; 691 case 5: 692 vp->v_type = VREG; 693 break; 694 case 6: 695 vp->v_type = VBLK; 696 break; 697 case 7: 698 vp->v_type = VCHR; 699 break; 700 case 9: 701 vp->v_type = VFIFO; 702 vp->v_op = &udf_fifoops; 703 break; 704 case 10: 705 vp->v_type = VSOCK; 706 break; 707 case 12: 708 vp->v_type = VLNK; 709 break; 710 } 711 712 if (vp->v_type != VFIFO) 713 VN_LOCK_ASHARE(vp); 714 715 if (ino == udf_getid(&udfmp->root_icb)) 716 vp->v_vflag |= VV_ROOT; 717 718 *vpp = vp; 719 720 return (0); 721 } 722 723 static int 724 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 725 { 726 struct ifid *ifhp; 727 struct vnode *nvp; 728 struct udf_node *np; 729 off_t fsize; 730 int error; 731 732 ifhp = (struct ifid *)fhp; 733 734 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 735 *vpp = NULLVP; 736 return (error); 737 } 738 739 np = VTON(nvp); 740 fsize = le64toh(np->fentry->inf_len); 741 742 *vpp = nvp; 743 vnode_create_vobject(*vpp, fsize, curthread); 744 return (0); 745 } 746 747 static int 748 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 749 { 750 struct part_map_spare *pms; 751 struct regid *pmap_id; 752 struct buf *bp; 753 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 754 int i, k, ptype, psize, error; 755 uint8_t *pmap = (uint8_t *) &lvd->maps[0]; 756 757 for (i = 0; i < le32toh(lvd->n_pm); i++) { 758 ptype = pmap[0]; 759 psize = pmap[1]; 760 if (((ptype != 1) && (ptype != 2)) || 761 ((psize != UDF_PMAP_TYPE1_SIZE) && 762 (psize != UDF_PMAP_TYPE2_SIZE))) { 763 printf("Invalid partition map found\n"); 764 return (1); 765 } 766 767 if (ptype == 1) { 768 /* Type 1 map. We don't care */ 769 pmap += UDF_PMAP_TYPE1_SIZE; 770 continue; 771 } 772 773 /* Type 2 map. Gotta find out the details */ 774 pmap_id = (struct regid *)&pmap[4]; 775 bzero(®id_id[0], UDF_REGID_ID_SIZE); 776 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 777 778 if (bcmp(®id_id[0], "*UDF Sparable Partition", 779 UDF_REGID_ID_SIZE)) { 780 printf("Unsupported partition map: %s\n", ®id_id[0]); 781 return (1); 782 } 783 784 pms = (struct part_map_spare *)pmap; 785 pmap += UDF_PMAP_TYPE2_SIZE; 786 MALLOC(udfmp->s_table, struct udf_sparing_table *, 787 le32toh(pms->st_size), M_UDFMOUNT, M_NOWAIT | M_ZERO); 788 if (udfmp->s_table == NULL) 789 return (ENOMEM); 790 791 /* Calculate the number of sectors per packet. */ 792 /* XXX Logical or physical? */ 793 udfmp->p_sectors = le16toh(pms->packet_len) / udfmp->bsize; 794 795 /* 796 * XXX If reading the first Sparing Table fails, should look 797 * for another table. 798 */ 799 if ((error = udf_readdevblks(udfmp, le32toh(pms->st_loc[0]), 800 le32toh(pms->st_size), &bp)) != 0) { 801 if (bp != NULL) 802 brelse(bp); 803 printf("Failed to read Sparing Table at sector %d\n", 804 le32toh(pms->st_loc[0])); 805 FREE(udfmp->s_table, M_UDFMOUNT); 806 return (error); 807 } 808 bcopy(bp->b_data, udfmp->s_table, le32toh(pms->st_size)); 809 brelse(bp); 810 811 if (udf_checktag(&udfmp->s_table->tag, 0)) { 812 printf("Invalid sparing table found\n"); 813 FREE(udfmp->s_table, M_UDFMOUNT); 814 return (EINVAL); 815 } 816 817 /* See how many valid entries there are here. The list is 818 * supposed to be sorted. 0xfffffff0 and higher are not valid 819 */ 820 for (k = 0; k < le16toh(udfmp->s_table->rt_l); k++) { 821 udfmp->s_table_entries = k; 822 if (le32toh(udfmp->s_table->entries[k].org) >= 823 0xfffffff0) 824 break; 825 } 826 } 827 828 return (0); 829 }
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