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: releng/12.0/sys/fs/udf/udf_vfsops.c 326268 2017-11-27 15:15:37Z pfg $ 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, td); 231 if ((error = namei(ndp))) 232 return (error); 233 NDFREE(ndp, NDF_ONLY_PNBUF); 234 devvp = ndp->ni_vp; 235 236 if (vn_isdisk(devvp, &error) == 0) { 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, 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_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 /* 451 * Grab the Fileset Descriptor 452 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 453 * me in the right direction here. 454 */ 455 sector = udfmp->part_start + fsd_offset; 456 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 457 printf("Cannot read sector %d of FSD\n", sector); 458 goto bail; 459 } 460 fsd = (struct fileset_desc *)bp->b_data; 461 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 462 fsd_found = 1; 463 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 464 sizeof(struct long_ad)); 465 } 466 467 brelse(bp); 468 bp = NULL; 469 470 if (!fsd_found) { 471 printf("Couldn't find the fsd\n"); 472 error = EINVAL; 473 goto bail; 474 } 475 476 /* 477 * Find the file entry for the root directory. 478 */ 479 sector = le32toh(udfmp->root_icb.loc.lb_num) + udfmp->part_start; 480 size = le32toh(udfmp->root_icb.len); 481 if ((error = udf_readdevblks(udfmp, sector, size, &bp)) != 0) { 482 printf("Cannot read sector %d\n", sector); 483 goto bail; 484 } 485 486 root_fentry = (struct file_entry *)bp->b_data; 487 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 488 printf("Invalid root file entry!\n"); 489 goto bail; 490 } 491 492 brelse(bp); 493 bp = NULL; 494 495 return 0; 496 497 bail: 498 if (udfmp != NULL) 499 free(udfmp, M_UDFMOUNT); 500 if (bp != NULL) 501 brelse(bp); 502 if (cp != NULL) { 503 g_topology_lock(); 504 g_vfs_close(cp); 505 g_topology_unlock(); 506 } 507 dev_rel(dev); 508 return error; 509 }; 510 511 static int 512 udf_unmount(struct mount *mp, int mntflags) 513 { 514 struct udf_mnt *udfmp; 515 int error, flags = 0; 516 517 udfmp = VFSTOUDFFS(mp); 518 519 if (mntflags & MNT_FORCE) 520 flags |= FORCECLOSE; 521 522 if ((error = vflush(mp, 0, flags, curthread))) 523 return (error); 524 525 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 526 if (udfmp->im_d2l) 527 udf_iconv->close(udfmp->im_d2l); 528 #if 0 529 if (udfmp->im_l2d) 530 udf_iconv->close(udfmp->im_l2d); 531 #endif 532 } 533 534 g_topology_lock(); 535 g_vfs_close(udfmp->im_cp); 536 g_topology_unlock(); 537 vrele(udfmp->im_devvp); 538 dev_rel(udfmp->im_dev); 539 540 if (udfmp->s_table != NULL) 541 free(udfmp->s_table, M_UDFMOUNT); 542 543 free(udfmp, M_UDFMOUNT); 544 545 mp->mnt_data = NULL; 546 MNT_ILOCK(mp); 547 mp->mnt_flag &= ~MNT_LOCAL; 548 MNT_IUNLOCK(mp); 549 550 return (0); 551 } 552 553 static int 554 udf_root(struct mount *mp, int flags, struct vnode **vpp) 555 { 556 struct udf_mnt *udfmp; 557 ino_t id; 558 559 udfmp = VFSTOUDFFS(mp); 560 561 id = udf_getid(&udfmp->root_icb); 562 563 return (udf_vget(mp, id, flags, vpp)); 564 } 565 566 static int 567 udf_statfs(struct mount *mp, struct statfs *sbp) 568 { 569 struct udf_mnt *udfmp; 570 571 udfmp = VFSTOUDFFS(mp); 572 573 sbp->f_bsize = udfmp->bsize; 574 sbp->f_iosize = udfmp->bsize; 575 sbp->f_blocks = udfmp->part_len; 576 sbp->f_bfree = 0; 577 sbp->f_bavail = 0; 578 sbp->f_files = 0; 579 sbp->f_ffree = 0; 580 return 0; 581 } 582 583 int 584 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 585 { 586 struct buf *bp; 587 struct vnode *devvp; 588 struct udf_mnt *udfmp; 589 struct thread *td; 590 struct vnode *vp; 591 struct udf_node *unode; 592 struct file_entry *fe; 593 int error, sector, size; 594 595 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 596 if (error || *vpp != NULL) 597 return (error); 598 599 /* 600 * We must promote to an exclusive lock for vnode creation. This 601 * can happen if lookup is passed LOCKSHARED. 602 */ 603 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 604 flags &= ~LK_TYPE_MASK; 605 flags |= LK_EXCLUSIVE; 606 } 607 608 /* 609 * We do not lock vnode creation as it is believed to be too 610 * expensive for such rare case as simultaneous creation of vnode 611 * for same ino by different processes. We just allow them to race 612 * and check later to decide who wins. Let the race begin! 613 */ 614 615 td = curthread; 616 udfmp = VFSTOUDFFS(mp); 617 618 unode = uma_zalloc(udf_zone_node, M_WAITOK | M_ZERO); 619 620 if ((error = udf_allocv(mp, &vp, td))) { 621 printf("Error from udf_allocv\n"); 622 uma_zfree(udf_zone_node, unode); 623 return (error); 624 } 625 626 unode->i_vnode = vp; 627 unode->hash_id = ino; 628 unode->udfmp = udfmp; 629 vp->v_data = unode; 630 631 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 632 error = insmntque(vp, mp); 633 if (error != 0) { 634 uma_zfree(udf_zone_node, unode); 635 return (error); 636 } 637 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL); 638 if (error || *vpp != NULL) 639 return (error); 640 641 /* 642 * Copy in the file entry. Per the spec, the size can only be 1 block. 643 */ 644 sector = ino + udfmp->part_start; 645 devvp = udfmp->im_devvp; 646 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 647 printf("Cannot read sector %d\n", sector); 648 vgone(vp); 649 vput(vp); 650 brelse(bp); 651 *vpp = NULL; 652 return (error); 653 } 654 655 fe = (struct file_entry *)bp->b_data; 656 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 657 printf("Invalid file entry!\n"); 658 vgone(vp); 659 vput(vp); 660 brelse(bp); 661 *vpp = NULL; 662 return (ENOMEM); 663 } 664 size = UDF_FENTRY_SIZE + le32toh(fe->l_ea) + le32toh(fe->l_ad); 665 unode->fentry = malloc(size, M_UDFFENTRY, M_NOWAIT | M_ZERO); 666 if (unode->fentry == NULL) { 667 printf("Cannot allocate file entry block\n"); 668 vgone(vp); 669 vput(vp); 670 brelse(bp); 671 *vpp = NULL; 672 return (ENOMEM); 673 } 674 675 bcopy(bp->b_data, unode->fentry, size); 676 677 brelse(bp); 678 bp = NULL; 679 680 switch (unode->fentry->icbtag.file_type) { 681 default: 682 vp->v_type = VBAD; 683 break; 684 case 4: 685 vp->v_type = VDIR; 686 break; 687 case 5: 688 vp->v_type = VREG; 689 break; 690 case 6: 691 vp->v_type = VBLK; 692 break; 693 case 7: 694 vp->v_type = VCHR; 695 break; 696 case 9: 697 vp->v_type = VFIFO; 698 vp->v_op = &udf_fifoops; 699 break; 700 case 10: 701 vp->v_type = VSOCK; 702 break; 703 case 12: 704 vp->v_type = VLNK; 705 break; 706 } 707 708 if (vp->v_type != VFIFO) 709 VN_LOCK_ASHARE(vp); 710 711 if (ino == udf_getid(&udfmp->root_icb)) 712 vp->v_vflag |= VV_ROOT; 713 714 *vpp = vp; 715 716 return (0); 717 } 718 719 static int 720 udf_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp) 721 { 722 struct ifid *ifhp; 723 struct vnode *nvp; 724 struct udf_node *np; 725 off_t fsize; 726 int error; 727 728 ifhp = (struct ifid *)fhp; 729 730 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 731 *vpp = NULLVP; 732 return (error); 733 } 734 735 np = VTON(nvp); 736 fsize = le64toh(np->fentry->inf_len); 737 738 *vpp = nvp; 739 vnode_create_vobject(*vpp, fsize, curthread); 740 return (0); 741 } 742 743 static int 744 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 745 { 746 struct part_map_spare *pms; 747 struct regid *pmap_id; 748 struct buf *bp; 749 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 750 int i, k, ptype, psize, error; 751 uint8_t *pmap = (uint8_t *) &lvd->maps[0]; 752 753 for (i = 0; i < le32toh(lvd->n_pm); i++) { 754 ptype = pmap[0]; 755 psize = pmap[1]; 756 if (((ptype != 1) && (ptype != 2)) || 757 ((psize != UDF_PMAP_TYPE1_SIZE) && 758 (psize != UDF_PMAP_TYPE2_SIZE))) { 759 printf("Invalid partition map found\n"); 760 return (1); 761 } 762 763 if (ptype == 1) { 764 /* Type 1 map. We don't care */ 765 pmap += UDF_PMAP_TYPE1_SIZE; 766 continue; 767 } 768 769 /* Type 2 map. Gotta find out the details */ 770 pmap_id = (struct regid *)&pmap[4]; 771 bzero(®id_id[0], UDF_REGID_ID_SIZE); 772 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 773 774 if (bcmp(®id_id[0], "*UDF Sparable Partition", 775 UDF_REGID_ID_SIZE)) { 776 printf("Unsupported partition map: %s\n", ®id_id[0]); 777 return (1); 778 } 779 780 pms = (struct part_map_spare *)pmap; 781 pmap += UDF_PMAP_TYPE2_SIZE; 782 udfmp->s_table = malloc(le32toh(pms->st_size), 783 M_UDFMOUNT, M_NOWAIT | M_ZERO); 784 if (udfmp->s_table == NULL) 785 return (ENOMEM); 786 787 /* Calculate the number of sectors per packet. */ 788 /* XXX Logical or physical? */ 789 udfmp->p_sectors = le16toh(pms->packet_len) / udfmp->bsize; 790 791 /* 792 * XXX If reading the first Sparing Table fails, should look 793 * for another table. 794 */ 795 if ((error = udf_readdevblks(udfmp, le32toh(pms->st_loc[0]), 796 le32toh(pms->st_size), &bp)) != 0) { 797 if (bp != NULL) 798 brelse(bp); 799 printf("Failed to read Sparing Table at sector %d\n", 800 le32toh(pms->st_loc[0])); 801 free(udfmp->s_table, M_UDFMOUNT); 802 return (error); 803 } 804 bcopy(bp->b_data, udfmp->s_table, le32toh(pms->st_size)); 805 brelse(bp); 806 807 if (udf_checktag(&udfmp->s_table->tag, 0)) { 808 printf("Invalid sparing table found\n"); 809 free(udfmp->s_table, M_UDFMOUNT); 810 return (EINVAL); 811 } 812 813 /* See how many valid entries there are here. The list is 814 * supposed to be sorted. 0xfffffff0 and higher are not valid 815 */ 816 for (k = 0; k < le16toh(udfmp->s_table->rt_l); k++) { 817 udfmp->s_table_entries = k; 818 if (le32toh(udfmp->s_table->entries[k].org) >= 819 0xfffffff0) 820 break; 821 } 822 } 823 824 return (0); 825 }
Cache object: c0906b8a593d71a1def38d8bc8578bed
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