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/proc.h> 88 #include <sys/queue.h> 89 #include <sys/vnode.h> 90 #include <sys/endian.h> 91 92 #include <vm/uma.h> 93 94 #include <fs/udf/ecma167-udf.h> 95 #include <fs/udf/osta.h> 96 #include <fs/udf/udf.h> 97 #include <fs/udf/udf_mount.h> 98 99 MALLOC_DEFINE(M_UDFMOUNT, "UDF mount", "UDF mount structure"); 100 MALLOC_DEFINE(M_UDFFENTRY, "UDF fentry", "UDF file entry structure"); 101 102 struct iconv_functions *udf_iconv = NULL; 103 104 /* Zones */ 105 uma_zone_t udf_zone_trans = NULL; 106 uma_zone_t udf_zone_node = NULL; 107 uma_zone_t udf_zone_ds = NULL; 108 109 static vfs_init_t udf_init; 110 static vfs_uninit_t udf_uninit; 111 static vfs_mount_t udf_mount; 112 static vfs_root_t udf_root; 113 static vfs_statfs_t udf_statfs; 114 static vfs_unmount_t udf_unmount; 115 static vfs_fhtovp_t udf_fhtovp; 116 static vfs_vptofh_t udf_vptofh; 117 118 static int udf_find_partmaps(struct udf_mnt *, struct logvol_desc *); 119 120 static struct vfsops udf_vfsops = { 121 .vfs_fhtovp = udf_fhtovp, 122 .vfs_init = udf_init, 123 .vfs_mount = udf_mount, 124 .vfs_root = udf_root, 125 .vfs_statfs = udf_statfs, 126 .vfs_uninit = udf_uninit, 127 .vfs_unmount = udf_unmount, 128 .vfs_vget = udf_vget, 129 .vfs_vptofh = udf_vptofh, 130 }; 131 VFS_SET(udf_vfsops, udf, VFCF_READONLY); 132 133 MODULE_VERSION(udf, 1); 134 135 static int udf_mountfs(struct vnode *, struct mount *, struct thread *); 136 137 static int 138 udf_init(struct vfsconf *foo) 139 { 140 141 /* 142 * This code used to pre-allocate a certain number of pages for each 143 * pool, reducing the need to grow the zones later on. UMA doesn't 144 * advertise any such functionality, unfortunately =-< 145 */ 146 udf_zone_trans = uma_zcreate("UDF translation buffer, zone", MAXNAMLEN * 147 sizeof(unicode_t), NULL, NULL, NULL, NULL, 0, 0); 148 149 udf_zone_node = uma_zcreate("UDF Node zone", sizeof(struct udf_node), 150 NULL, NULL, NULL, NULL, 0, 0); 151 152 udf_zone_ds = uma_zcreate("UDF Dirstream zone", 153 sizeof(struct udf_dirstream), NULL, NULL, NULL, NULL, 0, 0); 154 155 if ((udf_zone_node == NULL) || (udf_zone_trans == NULL) || 156 (udf_zone_ds == NULL)) { 157 printf("Cannot create allocation zones.\n"); 158 return (ENOMEM); 159 } 160 161 return 0; 162 } 163 164 static int 165 udf_uninit(struct vfsconf *foo) 166 { 167 168 if (udf_zone_trans != NULL) { 169 uma_zdestroy(udf_zone_trans); 170 udf_zone_trans = NULL; 171 } 172 173 if (udf_zone_node != NULL) { 174 uma_zdestroy(udf_zone_node); 175 udf_zone_node = NULL; 176 } 177 178 if (udf_zone_ds != NULL) { 179 uma_zdestroy(udf_zone_ds); 180 udf_zone_ds = NULL; 181 } 182 183 return (0); 184 } 185 186 static int 187 udf_mount(struct mount *mp, struct thread *td) 188 { 189 struct vnode *devvp; /* vnode of the mount device */ 190 struct udf_mnt *imp = 0; 191 struct export_args *export; 192 struct vfsoptlist *opts; 193 char *fspec, *cs_disk, *cs_local; 194 size_t size; 195 int error, len, *udf_flags; 196 struct nameidata nd, *ndp = &nd; 197 198 opts = mp->mnt_optnew; 199 200 if ((mp->mnt_flag & MNT_RDONLY) == 0) 201 return (EROFS); 202 203 /* 204 * No root filesystem support. Probably not a big deal, since the 205 * bootloader doesn't understand UDF. 206 */ 207 if (mp->mnt_flag & MNT_ROOTFS) 208 return (ENOTSUP); 209 210 fspec = NULL; 211 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 212 if (!error && fspec[len - 1] != '\0') 213 return (EINVAL); 214 215 if (mp->mnt_flag & MNT_UPDATE) { 216 imp = VFSTOUDFFS(mp); 217 if (fspec == NULL) { 218 error = vfs_getopt(opts, "export", (void **)&export, 219 &len); 220 if (error || len != sizeof(struct export_args)) 221 return (EINVAL); 222 return (vfs_export(mp, export)); 223 } 224 } 225 226 /* Check that the mount device exists */ 227 if (fspec == NULL) 228 return (EINVAL); 229 NDINIT(ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 230 if ((error = namei(ndp))) 231 return (error); 232 NDFREE(ndp, NDF_ONLY_PNBUF); 233 devvp = ndp->ni_vp; 234 235 if (vn_isdisk(devvp, &error) == 0) { 236 vrele(devvp); 237 return (error); 238 } 239 240 /* Check the access rights on the mount device */ 241 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 242 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td); 243 if (error) 244 error = suser(td); 245 if (error) { 246 vput(devvp); 247 return (error); 248 } 249 VOP_UNLOCK(devvp, 0, td); 250 251 if ((error = udf_mountfs(devvp, mp, td))) { 252 vrele(devvp); 253 return (error); 254 } 255 256 imp = VFSTOUDFFS(mp); 257 258 udf_flags = NULL; 259 error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len); 260 if (error || len != sizeof(int)) 261 return (EINVAL); 262 imp->im_flags = *udf_flags; 263 264 if (imp->im_flags & UDFMNT_KICONV && udf_iconv) { 265 cs_disk = NULL; 266 error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len); 267 if (!error && cs_disk[len - 1] != '\0') 268 return (EINVAL); 269 cs_local = NULL; 270 error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len); 271 if (!error && cs_local[len - 1] != '\0') 272 return (EINVAL); 273 udf_iconv->open(cs_local, cs_disk, &imp->im_d2l); 274 #if 0 275 udf_iconv->open(cs_disk, cs_local, &imp->im_l2d); 276 #endif 277 } 278 279 copystr(fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); 280 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 281 udf_statfs(mp, &mp->mnt_stat, td); 282 return 0; 283 }; 284 285 /* 286 * Check the descriptor tag for both the correct id and correct checksum. 287 * Return zero if all is good, EINVAL if not. 288 */ 289 int 290 udf_checktag(struct desc_tag *tag, uint16_t id) 291 { 292 uint8_t *itag; 293 uint8_t i, cksum = 0; 294 295 itag = (uint8_t *)tag; 296 297 if (tag->id != id) 298 return (EINVAL); 299 300 for (i = 0; i < 16; i++) 301 cksum = cksum + itag[i]; 302 cksum = cksum - itag[4]; 303 304 if (cksum == tag->cksum) 305 return (0); 306 307 return (EINVAL); 308 } 309 310 static int 311 udf_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td) { 312 struct buf *bp = NULL; 313 struct anchor_vdp avdp; 314 struct udf_mnt *udfmp = NULL; 315 struct part_desc *pd; 316 struct logvol_desc *lvd; 317 struct fileset_desc *fsd; 318 struct file_entry *root_fentry; 319 uint32_t sector, size, mvds_start, mvds_end; 320 uint32_t fsd_offset = 0; 321 uint16_t part_num = 0, fsd_part = 0; 322 int error = EINVAL, needclose = 0; 323 int logvol_found = 0, part_found = 0, fsd_found = 0; 324 int bsize; 325 326 /* 327 * Disallow multiple mounts of the same device. Flush the buffer 328 * cache for the device. 329 */ 330 if ((error = vfs_mountedon(devvp))) 331 return (error); 332 if (vcount(devvp) > 1) 333 return (EBUSY); 334 if ((error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0))) 335 return (error); 336 337 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 338 error = VOP_OPEN(devvp, FREAD, FSCRED, td, -1); 339 VOP_UNLOCK(devvp, 0, td); 340 if (error) 341 return error; 342 needclose = 1; 343 344 MALLOC(udfmp, struct udf_mnt *, sizeof(struct udf_mnt), M_UDFMOUNT, 345 M_NOWAIT | M_ZERO); 346 if (udfmp == NULL) { 347 printf("Cannot allocate UDF mount struct\n"); 348 error = ENOMEM; 349 goto bail; 350 } 351 352 mp->mnt_data = (qaddr_t)udfmp; 353 mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev); 354 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 355 mp->mnt_flag |= MNT_LOCAL; 356 udfmp->im_mountp = mp; 357 udfmp->im_dev = devvp->v_rdev; 358 udfmp->im_devvp = devvp; 359 udfmp->im_d2l = NULL; 360 #if 0 361 udfmp->im_l2d = NULL; 362 #endif 363 364 bsize = 2048; /* XXX Should probe the media for it's size */ 365 366 /* 367 * Get the Anchor Volume Descriptor Pointer from sector 256. 368 * XXX Should also check sector n - 256, n, and 512. 369 */ 370 sector = 256; 371 if ((error = bread(devvp, sector * btodb(bsize), bsize, NOCRED, 372 &bp)) != 0) 373 goto bail; 374 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 375 goto bail; 376 377 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 378 brelse(bp); 379 bp = NULL; 380 381 /* 382 * Extract the Partition Descriptor and Logical Volume Descriptor 383 * from the Volume Descriptor Sequence. 384 * XXX Should we care about the partition type right now? 385 * XXX What about multiple partitions? 386 */ 387 mvds_start = le32toh(avdp.main_vds_ex.loc); 388 mvds_end = mvds_start + (le32toh(avdp.main_vds_ex.len) - 1) / bsize; 389 for (sector = mvds_start; sector < mvds_end; sector++) { 390 if ((error = bread(devvp, sector * btodb(bsize), bsize, 391 NOCRED, &bp)) != 0) { 392 printf("Can't read sector %d of VDS\n", sector); 393 goto bail; 394 } 395 lvd = (struct logvol_desc *)bp->b_data; 396 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 397 udfmp->bsize = le32toh(lvd->lb_size); 398 udfmp->bmask = udfmp->bsize - 1; 399 udfmp->bshift = ffs(udfmp->bsize) - 1; 400 fsd_part = le16toh(lvd->_lvd_use.fsd_loc.loc.part_num); 401 fsd_offset = le32toh(lvd->_lvd_use.fsd_loc.loc.lb_num); 402 if (udf_find_partmaps(udfmp, lvd)) 403 break; 404 logvol_found = 1; 405 } 406 pd = (struct part_desc *)bp->b_data; 407 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 408 part_found = 1; 409 part_num = le16toh(pd->part_num); 410 udfmp->part_len = le32toh(pd->part_len); 411 udfmp->part_start = le32toh(pd->start_loc); 412 } 413 414 brelse(bp); 415 bp = NULL; 416 if ((part_found) && (logvol_found)) 417 break; 418 } 419 420 if (!part_found || !logvol_found) { 421 error = EINVAL; 422 goto bail; 423 } 424 425 if (fsd_part != part_num) { 426 printf("FSD does not lie within the partition!\n"); 427 error = EINVAL; 428 goto bail; 429 } 430 431 432 /* 433 * Grab the Fileset Descriptor 434 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 435 * me in the right direction here. 436 */ 437 sector = udfmp->part_start + fsd_offset; 438 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 439 printf("Cannot read sector %d of FSD\n", sector); 440 goto bail; 441 } 442 fsd = (struct fileset_desc *)bp->b_data; 443 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 444 fsd_found = 1; 445 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 446 sizeof(struct long_ad)); 447 } 448 449 brelse(bp); 450 bp = NULL; 451 452 if (!fsd_found) { 453 printf("Couldn't find the fsd\n"); 454 error = EINVAL; 455 goto bail; 456 } 457 458 /* 459 * Find the file entry for the root directory. 460 */ 461 sector = le32toh(udfmp->root_icb.loc.lb_num) + udfmp->part_start; 462 size = le32toh(udfmp->root_icb.len); 463 if ((error = udf_readlblks(udfmp, sector, size, &bp)) != 0) { 464 printf("Cannot read sector %d\n", sector); 465 goto bail; 466 } 467 468 root_fentry = (struct file_entry *)bp->b_data; 469 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 470 printf("Invalid root file entry!\n"); 471 goto bail; 472 } 473 474 brelse(bp); 475 bp = NULL; 476 477 devvp->v_rdev->si_mountpoint = mp; 478 479 mtx_init(&udfmp->hash_mtx, "udf_hash", NULL, MTX_DEF); 480 udfmp->hashtbl = phashinit(UDF_HASHTBLSIZE, M_UDFMOUNT, &udfmp->hashsz); 481 482 return 0; 483 484 bail: 485 if (udfmp != NULL) 486 FREE(udfmp, M_UDFMOUNT); 487 if (bp != NULL) 488 brelse(bp); 489 if (needclose) 490 VOP_CLOSE(devvp, FREAD, NOCRED, td); 491 return error; 492 }; 493 494 static int 495 udf_unmount(struct mount *mp, int mntflags, struct thread *td) 496 { 497 struct udf_mnt *udfmp; 498 int error, flags = 0; 499 500 udfmp = VFSTOUDFFS(mp); 501 502 if (mntflags & MNT_FORCE) 503 flags |= FORCECLOSE; 504 505 if ((error = vflush(mp, 0, flags, td))) 506 return (error); 507 508 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) { 509 if (udfmp->im_d2l) 510 udf_iconv->close(udfmp->im_d2l); 511 #if 0 512 if (udfmp->im_l2d) 513 udf_iconv->close(udfmp->im_l2d); 514 #endif 515 } 516 517 udfmp->im_devvp->v_rdev->si_mountpoint = NULL; 518 error = VOP_CLOSE(udfmp->im_devvp, FREAD, NOCRED, td); 519 vrele(udfmp->im_devvp); 520 521 if (udfmp->s_table != NULL) 522 FREE(udfmp->s_table, M_UDFMOUNT); 523 524 if (udfmp->hashtbl != NULL) 525 FREE(udfmp->hashtbl, M_UDFMOUNT); 526 527 FREE(udfmp, M_UDFMOUNT); 528 529 mp->mnt_data = (qaddr_t)0; 530 mp->mnt_flag &= ~MNT_LOCAL; 531 532 return (0); 533 } 534 535 static int 536 udf_root(struct mount *mp, struct vnode **vpp, struct thread *td) 537 { 538 struct udf_mnt *udfmp; 539 struct vnode *vp; 540 ino_t id; 541 int error; 542 543 udfmp = VFSTOUDFFS(mp); 544 545 id = udf_getid(&udfmp->root_icb); 546 547 error = udf_vget(mp, id, LK_EXCLUSIVE, vpp); 548 if (error) 549 return error; 550 551 vp = *vpp; 552 vp->v_vflag |= VV_ROOT; 553 554 return (0); 555 } 556 557 static int 558 udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 559 { 560 struct udf_mnt *udfmp; 561 562 udfmp = VFSTOUDFFS(mp); 563 564 sbp->f_bsize = udfmp->bsize; 565 sbp->f_iosize = udfmp->bsize; 566 sbp->f_blocks = udfmp->part_len; 567 sbp->f_bfree = 0; 568 sbp->f_bavail = 0; 569 sbp->f_files = 0; 570 sbp->f_ffree = 0; 571 if (sbp != &mp->mnt_stat) { 572 sbp->f_type = mp->mnt_vfc->vfc_typenum; 573 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 574 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 575 } 576 577 return 0; 578 } 579 580 int 581 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 582 { 583 struct buf *bp; 584 struct vnode *devvp; 585 struct udf_mnt *udfmp; 586 struct thread *td; 587 struct vnode *vp; 588 struct udf_node *unode; 589 struct file_entry *fe; 590 int error, sector, size; 591 592 td = curthread; 593 udfmp = VFSTOUDFFS(mp); 594 595 /* See if we already have this in the cache */ 596 if ((error = udf_hashlookup(udfmp, ino, flags, vpp)) != 0) 597 return (error); 598 if (*vpp != NULL) { 599 return (0); 600 } 601 602 /* 603 * Allocate memory and check the tag id's before grabbing a new 604 * vnode, since it's hard to roll back if there is a problem. 605 */ 606 unode = uma_zalloc(udf_zone_node, M_WAITOK); 607 if (unode == NULL) { 608 printf("Cannot allocate udf node\n"); 609 return (ENOMEM); 610 } 611 612 /* 613 * Copy in the file entry. Per the spec, the size can only be 1 block. 614 */ 615 sector = ino + udfmp->part_start; 616 devvp = udfmp->im_devvp; 617 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 618 printf("Cannot read sector %d\n", sector); 619 uma_zfree(udf_zone_node, unode); 620 return (error); 621 } 622 623 fe = (struct file_entry *)bp->b_data; 624 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 625 printf("Invalid file entry!\n"); 626 uma_zfree(udf_zone_node, unode); 627 brelse(bp); 628 return (ENOMEM); 629 } 630 size = UDF_FENTRY_SIZE + le32toh(fe->l_ea) + le32toh(fe->l_ad); 631 MALLOC(unode->fentry, struct file_entry *, size, M_UDFFENTRY, 632 M_NOWAIT | M_ZERO); 633 if (unode->fentry == NULL) { 634 printf("Cannot allocate file entry block\n"); 635 uma_zfree(udf_zone_node, unode); 636 brelse(bp); 637 return (ENOMEM); 638 } 639 640 bcopy(bp->b_data, unode->fentry, size); 641 642 brelse(bp); 643 bp = NULL; 644 645 if ((error = udf_allocv(mp, &vp, td))) { 646 printf("Error from udf_allocv\n"); 647 uma_zfree(udf_zone_node, unode); 648 return (error); 649 } 650 651 unode->i_vnode = vp; 652 unode->hash_id = ino; 653 unode->i_devvp = udfmp->im_devvp; 654 unode->i_dev = udfmp->im_dev; 655 unode->udfmp = udfmp; 656 vp->v_data = unode; 657 VREF(udfmp->im_devvp); 658 udf_hashins(unode); 659 660 switch (unode->fentry->icbtag.file_type) { 661 default: 662 vp->v_type = VBAD; 663 break; 664 case 4: 665 vp->v_type = VDIR; 666 break; 667 case 5: 668 vp->v_type = VREG; 669 break; 670 case 6: 671 vp->v_type = VBLK; 672 break; 673 case 7: 674 vp->v_type = VCHR; 675 break; 676 case 9: 677 vp->v_type = VFIFO; 678 break; 679 case 10: 680 vp->v_type = VSOCK; 681 break; 682 case 12: 683 vp->v_type = VLNK; 684 break; 685 } 686 *vpp = vp; 687 688 return (0); 689 } 690 691 struct ifid { 692 u_short ifid_len; 693 u_short ifid_pad; 694 int ifid_ino; 695 long ifid_start; 696 }; 697 698 static int 699 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 700 { 701 struct ifid *ifhp; 702 struct vnode *nvp; 703 int error; 704 705 ifhp = (struct ifid *)fhp; 706 707 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 708 *vpp = NULLVP; 709 return (error); 710 } 711 712 *vpp = nvp; 713 return (0); 714 } 715 716 static int 717 udf_vptofh (struct vnode *vp, struct fid *fhp) 718 { 719 struct udf_node *node; 720 struct ifid *ifhp; 721 722 node = VTON(vp); 723 ifhp = (struct ifid *)fhp; 724 ifhp->ifid_len = sizeof(struct ifid); 725 ifhp->ifid_ino = node->hash_id; 726 727 return (0); 728 } 729 730 static int 731 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 732 { 733 union udf_pmap *pmap; 734 struct part_map_spare *pms; 735 struct regid *pmap_id; 736 struct buf *bp; 737 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 738 int i, ptype, psize, error; 739 740 for (i = 0; i < le32toh(lvd->n_pm); i++) { 741 pmap = (union udf_pmap *)&lvd->maps[i * UDF_PMAP_SIZE]; 742 ptype = pmap->data[0]; 743 psize = pmap->data[1]; 744 if (((ptype != 1) && (ptype != 2)) || 745 ((psize != UDF_PMAP_SIZE) && (psize != 6))) { 746 printf("Invalid partition map found\n"); 747 return (1); 748 } 749 750 if (ptype == 1) { 751 /* Type 1 map. We don't care */ 752 continue; 753 } 754 755 /* Type 2 map. Gotta find out the details */ 756 pmap_id = (struct regid *)&pmap->data[4]; 757 bzero(®id_id[0], UDF_REGID_ID_SIZE); 758 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 759 760 if (bcmp(®id_id[0], "*UDF Sparable Partition", 761 UDF_REGID_ID_SIZE)) { 762 printf("Unsupported partition map: %s\n", ®id_id[0]); 763 return (1); 764 } 765 766 pms = &pmap->pms; 767 MALLOC(udfmp->s_table, struct udf_sparing_table *, 768 le32toh(pms->st_size), M_UDFMOUNT, M_NOWAIT | M_ZERO); 769 if (udfmp->s_table == NULL) 770 return (ENOMEM); 771 772 /* Calculate the number of sectors per packet. */ 773 /* XXX Logical or physical? */ 774 udfmp->p_sectors = le16toh(pms->packet_len) / udfmp->bsize; 775 776 /* 777 * XXX If reading the first Sparing Table fails, should look 778 * for another table. 779 */ 780 if ((error = udf_readlblks(udfmp, le32toh(pms->st_loc[0]), 781 le32toh(pms->st_size), &bp)) != 0) { 782 if (bp != NULL) 783 brelse(bp); 784 printf("Failed to read Sparing Table at sector %d\n", 785 le32toh(pms->st_loc[0])); 786 return (error); 787 } 788 bcopy(bp->b_data, udfmp->s_table, le32toh(pms->st_size)); 789 brelse(bp); 790 791 if (udf_checktag(&udfmp->s_table->tag, 0)) { 792 printf("Invalid sparing table found\n"); 793 return (EINVAL); 794 } 795 796 /* See how many valid entries there are here. The list is 797 * supposed to be sorted. 0xfffffff0 and higher are not valid 798 */ 799 for (i = 0; i < le16toh(udfmp->s_table->rt_l); i++) { 800 udfmp->s_table_entries = i; 801 if (le32toh(udfmp->s_table->entries[i].org) >= 802 0xfffffff0) 803 break; 804 } 805 } 806 807 return (0); 808 }
Cache object: 8ccdfaa123e679c10d3b711f249960a2
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