1 /* $OpenBSD: udf_vfsops.c,v 1.31 2009/08/27 23:14:47 jolan Exp $ */ 2 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: src/sys/fs/udf/udf_vfsops.c,v 1.25 2005/01/25 15:52:03 phk Exp $ 29 */ 30 31 /* 32 * Ported to OpenBSD by Pedro Martelletto in February 2005. 33 */ 34 35 /* 36 * Ok, here's how it goes. The UDF specs are pretty clear on how each data 37 * structure is made up, but not very clear on how they relate to each other. 38 * Here is the skinny... This demostrates a filesystem with one file in the 39 * root directory. Subdirectories are treated just as normal files, but they 40 * have File Id Descriptors of their children as their file data. As for the 41 * Anchor Volume Descriptor Pointer, it can exist in two of the following three 42 * places: sector 256, sector n (the max sector of the disk), or sector 43 * n - 256. It's a pretty good bet that one will exist at sector 256 though. 44 * One caveat is unclosed CD media. For that, sector 256 cannot be written, 45 * so the Anchor Volume Descriptor Pointer can exist at sector 512 until the 46 * media is closed. 47 */ 48 49 #include <sys/types.h> 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/uio.h> 53 #include <sys/buf.h> 54 #include <sys/conf.h> 55 #include <sys/dirent.h> 56 #include <sys/fcntl.h> 57 #include <sys/kernel.h> 58 #include <sys/malloc.h> 59 #include <sys/mutex.h> 60 #include <sys/mount.h> 61 #include <sys/namei.h> 62 #include <sys/pool.h> 63 #include <sys/proc.h> 64 #include <sys/lock.h> 65 #include <sys/queue.h> 66 #include <sys/vnode.h> 67 #include <sys/endian.h> 68 69 #include <miscfs/specfs/specdev.h> 70 71 #include <isofs/udf/ecma167-udf.h> 72 #include <isofs/udf/udf.h> 73 #include <isofs/udf/udf_extern.h> 74 75 struct pool udf_trans_pool; 76 struct pool unode_pool; 77 struct pool udf_ds_pool; 78 79 int udf_find_partmaps(struct umount *, struct logvol_desc *); 80 int udf_get_vpartmap(struct umount *, struct part_map_virt *); 81 int udf_get_spartmap(struct umount *, struct part_map_spare *); 82 int udf_get_mpartmap(struct umount *, struct part_map_meta *); 83 int udf_mountfs(struct vnode *, struct mount *, uint32_t, struct proc *); 84 85 const struct vfsops udf_vfsops = { 86 .vfs_fhtovp = udf_fhtovp, 87 .vfs_init = udf_init, 88 .vfs_mount = udf_mount, 89 .vfs_start = udf_start, 90 .vfs_root = udf_root, 91 .vfs_quotactl = udf_quotactl, 92 .vfs_statfs = udf_statfs, 93 .vfs_sync = udf_sync, 94 .vfs_unmount = udf_unmount, 95 .vfs_vget = udf_vget, 96 .vfs_vptofh = udf_vptofh, 97 .vfs_sysctl = udf_sysctl, 98 .vfs_checkexp = udf_checkexp, 99 }; 100 101 int 102 udf_init(struct vfsconf *foo) 103 { 104 pool_init(&udf_trans_pool, MAXNAMLEN * sizeof(unicode_t), 0, 0, 0, 105 "udftrpl", &pool_allocator_nointr); 106 pool_init(&unode_pool, sizeof(struct unode), 0, 0, 0, 107 "udfndpl", &pool_allocator_nointr); 108 pool_init(&udf_ds_pool, sizeof(struct udf_dirstream), 0, 0, 0, 109 "udfdspl", &pool_allocator_nointr); 110 111 return (0); 112 } 113 114 int 115 udf_start(struct mount *mp, int flags, struct proc *p) 116 { 117 return (0); 118 } 119 120 int 121 udf_mount(struct mount *mp, const char *path, void *data, 122 struct nameidata *ndp, struct proc *p) 123 { 124 struct vnode *devvp; /* vnode of the mount device */ 125 struct udf_args args; 126 size_t len; 127 int error; 128 129 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 130 mp->mnt_flag |= MNT_RDONLY; 131 #ifdef UDF_DEBUG 132 printf("udf_mount: enforcing read-only mode\n"); 133 #endif 134 } 135 136 /* 137 * No root filesystem support. Probably not a big deal, since the 138 * bootloader doesn't understand UDF. 139 */ 140 if (mp->mnt_flag & MNT_ROOTFS) 141 return (EOPNOTSUPP); 142 143 error = copyin(data, &args, sizeof(struct udf_args)); 144 if (error) 145 return (error); 146 147 if (args.fspec == NULL) 148 return (EINVAL); 149 150 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 151 if ((error = namei(ndp))) 152 return (error); 153 154 devvp = ndp->ni_vp; 155 if (devvp->v_type != VBLK) { 156 vrele(devvp); 157 return (ENOTBLK); 158 } 159 160 if (major(devvp->v_rdev) >= nblkdev) { 161 vrele(devvp); 162 return (ENXIO); 163 } 164 165 /* Check the access rights on the mount device */ 166 if (p->p_ucred->cr_uid) { 167 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 168 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 169 VOP_UNLOCK(devvp, 0, p); 170 if (error) { 171 vrele(devvp); 172 return (error); 173 } 174 } 175 176 if ((error = udf_mountfs(devvp, mp, args.lastblock, p))) { 177 vrele(devvp); 178 return (error); 179 } 180 181 /* 182 * Keep a copy of the mount information. 183 */ 184 copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &len); 185 bzero(mp->mnt_stat.f_mntonname + len, MNAMELEN - len); 186 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &len); 187 bzero(mp->mnt_stat.f_mntfromname + len, MNAMELEN - len); 188 189 return (0); 190 }; 191 192 /* 193 * Check the descriptor tag for both the correct id and correct checksum. 194 * Return zero if all is good, EINVAL if not. 195 */ 196 int 197 udf_checktag(struct desc_tag *tag, uint16_t id) 198 { 199 uint8_t *itag; 200 uint8_t i, cksum = 0; 201 202 itag = (uint8_t *)tag; 203 204 if (letoh16(tag->id) != id) 205 return (EINVAL); 206 207 for (i = 0; i < 15; i++) 208 cksum = cksum + itag[i]; 209 cksum = cksum - itag[4]; 210 211 if (cksum == tag->cksum) 212 return (0); 213 214 return (EINVAL); 215 } 216 217 int 218 udf_mountfs(struct vnode *devvp, struct mount *mp, uint32_t lb, struct proc *p) 219 { 220 struct buf *bp = NULL; 221 struct anchor_vdp avdp; 222 struct umount *ump = NULL; 223 struct part_desc *pd; 224 struct logvol_desc *lvd; 225 struct fileset_desc *fsd; 226 struct extfile_entry *xfentry; 227 struct file_entry *fentry; 228 uint32_t sector, size, mvds_start, mvds_end; 229 uint32_t fsd_offset = 0; 230 uint16_t part_num = 0, fsd_part = 0; 231 int error = EINVAL; 232 int logvol_found = 0, part_found = 0, fsd_found = 0; 233 int bsize; 234 235 /* 236 * Disallow multiple mounts of the same device. 237 * Disallow mounting of a device that is currently in use 238 * (except for root, which might share swap device for miniroot). 239 * Flush out any old buffers remaining from a previous use. 240 */ 241 if ((error = vfs_mountedon(devvp))) 242 return (error); 243 if (vcount(devvp) > 1 && devvp != rootvp) 244 return (EBUSY); 245 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 246 error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0); 247 VOP_UNLOCK(devvp, 0, p); 248 if (error) 249 return (error); 250 251 error = VOP_OPEN(devvp, FREAD, FSCRED, p); 252 if (error) 253 return (error); 254 255 ump = malloc(sizeof(*ump), M_UDFMOUNT, M_WAITOK | M_ZERO); 256 257 mp->mnt_data = (qaddr_t) ump; 258 mp->mnt_stat.f_fsid.val[0] = devvp->v_rdev; 259 mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_UDF); 260 mp->mnt_flag |= MNT_LOCAL; 261 262 ump->um_mountp = mp; 263 ump->um_dev = devvp->v_rdev; 264 ump->um_devvp = devvp; 265 266 bsize = 2048; /* Should probe the media for its size. */ 267 268 /* 269 * Get the Anchor Volume Descriptor Pointer from sector 256. 270 * Should also check sector n - 256, n, and 512. 271 */ 272 sector = 256; 273 if ((error = bread(devvp, sector * btodb(bsize), bsize, NOCRED, 274 &bp)) != 0) 275 goto bail; 276 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 277 goto bail; 278 279 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 280 brelse(bp); 281 bp = NULL; 282 283 /* 284 * Extract the Partition Descriptor and Logical Volume Descriptor 285 * from the Volume Descriptor Sequence. 286 * Should we care about the partition type right now? 287 * What about multiple partitions? 288 */ 289 mvds_start = letoh32(avdp.main_vds_ex.loc); 290 mvds_end = mvds_start + (letoh32(avdp.main_vds_ex.len) - 1) / bsize; 291 for (sector = mvds_start; sector < mvds_end; sector++) { 292 if ((error = bread(devvp, sector * btodb(bsize), bsize, 293 NOCRED, &bp)) != 0) { 294 printf("Can't read sector %d of VDS\n", sector); 295 goto bail; 296 } 297 lvd = (struct logvol_desc *)bp->b_data; 298 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 299 ump->um_bsize = letoh32(lvd->lb_size); 300 ump->um_bmask = ump->um_bsize - 1; 301 ump->um_bshift = ffs(ump->um_bsize) - 1; 302 fsd_part = letoh16(lvd->_lvd_use.fsd_loc.loc.part_num); 303 fsd_offset = letoh32(lvd->_lvd_use.fsd_loc.loc.lb_num); 304 if (udf_find_partmaps(ump, lvd)) 305 break; 306 logvol_found = 1; 307 } 308 pd = (struct part_desc *)bp->b_data; 309 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 310 part_found = 1; 311 part_num = letoh16(pd->part_num); 312 ump->um_len = ump->um_reallen = letoh32(pd->part_len); 313 ump->um_start = ump->um_realstart = letoh32(pd->start_loc); 314 } 315 316 brelse(bp); 317 bp = NULL; 318 if ((part_found) && (logvol_found)) 319 break; 320 } 321 322 if (!part_found || !logvol_found) { 323 error = EINVAL; 324 goto bail; 325 } 326 327 if (ISSET(ump->um_flags, UDF_MNT_USES_META)) { 328 /* Read Metadata File 'File Entry' to find Metadata file. */ 329 struct long_ad *la; 330 sector = ump->um_start + ump->um_meta_start; /* Set in udf_get_mpartmap() */ 331 if ((error = RDSECTOR(devvp, sector, ump->um_bsize, &bp)) != 0) { 332 printf("Cannot read sector %d for Metadata File Entry\n", sector); 333 error = EINVAL; 334 goto bail; 335 } 336 xfentry = (struct extfile_entry *)bp->b_data; 337 fentry = (struct file_entry *)bp->b_data; 338 if (udf_checktag(&xfentry->tag, TAGID_EXTFENTRY) == 0) 339 la = (struct long_ad *)&xfentry->data[letoh32(xfentry->l_ea)]; 340 else if (udf_checktag(&fentry->tag, TAGID_FENTRY) == 0) 341 la = (struct long_ad *)&fentry->data[letoh32(fentry->l_ea)]; 342 else { 343 printf("Invalid Metadata File FE @ sector %d! (tag.id %d)\n", 344 sector, fentry->tag.id); 345 error = EINVAL; 346 goto bail; 347 } 348 ump->um_meta_start = letoh32(la->loc.lb_num); 349 ump->um_meta_len = letoh32(la->len); 350 if (bp != NULL) { 351 brelse(bp); 352 bp = NULL; 353 } 354 } else if (fsd_part != part_num) { 355 printf("FSD does not lie within the partition!\n"); 356 error = EINVAL; 357 goto bail; 358 } 359 360 mtx_init(&ump->um_hashmtx, IPL_NONE); 361 ump->um_hashtbl = hashinit(UDF_HASHTBLSIZE, M_UDFMOUNT, M_WAITOK, 362 &ump->um_hashsz); 363 364 /* Get the VAT, if needed */ 365 if (ump->um_flags & UDF_MNT_FIND_VAT) { 366 error = udf_vat_get(ump, lb); 367 if (error) 368 goto bail; 369 } 370 371 /* 372 * Grab the Fileset Descriptor 373 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 374 * me in the right direction here. 375 */ 376 377 if (ISSET(ump->um_flags, UDF_MNT_USES_META)) 378 sector = ump->um_meta_start; 379 else 380 sector = fsd_offset; 381 udf_vat_map(ump, §or); 382 if ((error = RDSECTOR(devvp, sector, ump->um_bsize, &bp)) != 0) { 383 printf("Cannot read sector %d of FSD\n", sector); 384 goto bail; 385 } 386 fsd = (struct fileset_desc *)bp->b_data; 387 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 388 fsd_found = 1; 389 bcopy(&fsd->rootdir_icb, &ump->um_root_icb, 390 sizeof(struct long_ad)); 391 if (ISSET(ump->um_flags, UDF_MNT_USES_META)) { 392 ump->um_root_icb.loc.lb_num += ump->um_meta_start; 393 ump->um_root_icb.loc.part_num = part_num; 394 } 395 } 396 397 brelse(bp); 398 bp = NULL; 399 400 if (!fsd_found) { 401 printf("Couldn't find the fsd\n"); 402 error = EINVAL; 403 goto bail; 404 } 405 406 /* 407 * Find the file entry for the root directory. 408 */ 409 sector = letoh32(ump->um_root_icb.loc.lb_num); 410 size = letoh32(ump->um_root_icb.len); 411 udf_vat_map(ump, §or); 412 if ((error = udf_readlblks(ump, sector, size, &bp)) != 0) { 413 printf("Cannot read sector %d\n", sector); 414 goto bail; 415 } 416 417 xfentry = (struct extfile_entry *)bp->b_data; 418 fentry = (struct file_entry *)bp->b_data; 419 error = udf_checktag(&xfentry->tag, TAGID_EXTFENTRY); 420 if (error) { 421 error = udf_checktag(&fentry->tag, TAGID_FENTRY); 422 if (error) { 423 printf("Invalid root file entry!\n"); 424 goto bail; 425 } 426 } 427 428 brelse(bp); 429 bp = NULL; 430 431 devvp->v_specmountpoint = mp; 432 433 return (0); 434 435 bail: 436 if (ump->um_hashtbl != NULL) 437 free(ump->um_hashtbl, M_UDFMOUNT); 438 439 if (ump != NULL) { 440 free(ump, M_UDFMOUNT); 441 mp->mnt_data = NULL; 442 mp->mnt_flag &= ~MNT_LOCAL; 443 } 444 if (bp != NULL) 445 brelse(bp); 446 VOP_CLOSE(devvp, FREAD, FSCRED, p); 447 448 return (error); 449 } 450 451 int 452 udf_unmount(struct mount *mp, int mntflags, struct proc *p) 453 { 454 struct umount *ump; 455 struct vnode *devvp; 456 int error, flags = 0; 457 458 ump = VFSTOUDFFS(mp); 459 devvp = ump->um_devvp; 460 461 if (mntflags & MNT_FORCE) 462 flags |= FORCECLOSE; 463 464 if ((error = vflush(mp, NULL, flags))) 465 return (error); 466 467 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 468 vinvalbuf(devvp, V_SAVE, NOCRED, p, 0, 0); 469 error = VOP_CLOSE(devvp, FREAD, NOCRED, p); 470 VOP_UNLOCK(devvp, 0, p); 471 if (error) 472 return (error); 473 474 devvp->v_specmountpoint = NULL; 475 vrele(devvp); 476 477 if (ump->um_flags & UDF_MNT_USES_VAT) 478 free(ump->um_vat, M_UDFMOUNT); 479 480 if (ump->um_stbl != NULL) 481 free(ump->um_stbl, M_UDFMOUNT); 482 483 if (ump->um_hashtbl != NULL) 484 free(ump->um_hashtbl, M_UDFMOUNT); 485 486 free(ump, M_UDFMOUNT); 487 488 mp->mnt_data = (qaddr_t)0; 489 mp->mnt_flag &= ~MNT_LOCAL; 490 491 return (0); 492 } 493 494 int 495 udf_root(struct mount *mp, struct vnode **vpp) 496 { 497 struct umount *ump; 498 struct vnode *vp; 499 ino_t id; 500 int error; 501 502 ump = VFSTOUDFFS(mp); 503 504 id = udf_getid(&ump->um_root_icb); 505 506 error = udf_vget(mp, id, vpp); 507 if (error) 508 return (error); 509 510 vp = *vpp; 511 vp->v_flag |= VROOT; 512 513 return (0); 514 } 515 516 int 517 udf_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 518 struct proc *p) 519 { 520 return (EOPNOTSUPP); 521 } 522 523 int 524 udf_statfs(struct mount *mp, struct statfs *sbp, struct proc *p) 525 { 526 struct umount *ump; 527 528 ump = VFSTOUDFFS(mp); 529 530 sbp->f_bsize = ump->um_bsize; 531 sbp->f_iosize = ump->um_bsize; 532 sbp->f_blocks = ump->um_len; 533 sbp->f_bfree = 0; 534 sbp->f_bavail = 0; 535 sbp->f_files = 0; 536 sbp->f_ffree = 0; 537 538 return (0); 539 } 540 541 int 542 udf_sync(struct mount *mp, int waitfor, struct ucred *cred, struct proc *p) 543 { 544 return (0); 545 } 546 547 int 548 udf_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 549 { 550 struct buf *bp; 551 struct vnode *devvp; 552 struct umount *ump; 553 struct proc *p; 554 struct vnode *vp, *nvp; 555 struct unode *up; 556 struct extfile_entry *xfe; 557 struct file_entry *fe; 558 int error, sector, size; 559 560 p = curproc; 561 bp = NULL; 562 *vpp = NULL; 563 ump = VFSTOUDFFS(mp); 564 565 /* See if we already have this in the cache */ 566 if ((error = udf_hashlookup(ump, ino, LK_EXCLUSIVE, vpp)) != 0) 567 return (error); 568 if (*vpp != NULL) 569 return (0); 570 571 /* 572 * Allocate memory and check the tag id's before grabbing a new 573 * vnode, since it's hard to roll back if there is a problem. 574 */ 575 up = pool_get(&unode_pool, PR_WAITOK | PR_ZERO); 576 577 /* 578 * Copy in the file entry. Per the spec, the size can only be 1 block. 579 */ 580 sector = ino; 581 devvp = ump->um_devvp; 582 udf_vat_map(ump, §or); 583 if ((error = RDSECTOR(devvp, sector, ump->um_bsize, &bp)) != 0) { 584 printf("Cannot read sector %d\n", sector); 585 pool_put(&unode_pool, up); 586 if (bp != NULL) 587 brelse(bp); 588 return (error); 589 } 590 591 xfe = (struct extfile_entry *)bp->b_data; 592 fe = (struct file_entry *)bp->b_data; 593 error = udf_checktag(&xfe->tag, TAGID_EXTFENTRY); 594 if (error == 0) { 595 size = letoh32(xfe->l_ea) + letoh32(xfe->l_ad); 596 } else { 597 error = udf_checktag(&fe->tag, TAGID_FENTRY); 598 if (error) { 599 printf("Invalid file entry!\n"); 600 pool_put(&unode_pool, up); 601 if (bp != NULL) 602 brelse(bp); 603 return (ENOMEM); 604 } else 605 size = letoh32(fe->l_ea) + letoh32(fe->l_ad); 606 } 607 608 /* Allocate max size of FE/XFE. */ 609 up->u_fentry = malloc(size + UDF_EXTFENTRY_SIZE, M_UDFFENTRY, M_NOWAIT | M_ZERO); 610 if (up->u_fentry == NULL) { 611 pool_put(&unode_pool, up); 612 if (bp != NULL) 613 brelse(bp); 614 return (ENOMEM); /* Cannot allocate file entry block */ 615 } 616 617 if (udf_checktag(&xfe->tag, TAGID_EXTFENTRY) == 0) 618 bcopy(bp->b_data, up->u_fentry, size + UDF_EXTFENTRY_SIZE); 619 else 620 bcopy(bp->b_data, up->u_fentry, size + UDF_FENTRY_SIZE); 621 622 brelse(bp); 623 bp = NULL; 624 625 if ((error = udf_allocv(mp, &vp, p))) { 626 free(up->u_fentry, M_UDFFENTRY); 627 pool_put(&unode_pool, up); 628 return (error); /* Error from udf_allocv() */ 629 } 630 631 up->u_vnode = vp; 632 up->u_ino = ino; 633 up->u_devvp = ump->um_devvp; 634 up->u_dev = ump->um_dev; 635 up->u_ump = ump; 636 vp->v_data = up; 637 vref(ump->um_devvp); 638 639 lockinit(&up->u_lock, PINOD, "unode", 0, 0); 640 641 /* 642 * udf_hashins() will lock the vnode for us. 643 */ 644 udf_hashins(up); 645 646 switch (up->u_fentry->icbtag.file_type) { 647 default: 648 printf("Unrecognized file type (%d)\n", vp->v_type); 649 vp->v_type = VREG; 650 break; 651 case UDF_ICB_FILETYPE_DIRECTORY: 652 vp->v_type = VDIR; 653 break; 654 case UDF_ICB_FILETYPE_BLOCKDEVICE: 655 vp->v_type = VBLK; 656 break; 657 case UDF_ICB_FILETYPE_CHARDEVICE: 658 vp->v_type = VCHR; 659 break; 660 case UDF_ICB_FILETYPE_FIFO: 661 vp->v_type = VFIFO; 662 break; 663 case UDF_ICB_FILETYPE_SOCKET: 664 vp->v_type = VSOCK; 665 break; 666 case UDF_ICB_FILETYPE_SYMLINK: 667 vp->v_type = VLNK; 668 break; 669 case UDF_ICB_FILETYPE_RANDOMACCESS: 670 case UDF_ICB_FILETYPE_REALTIME: 671 case UDF_ICB_FILETYPE_UNKNOWN: 672 vp->v_type = VREG; 673 break; 674 } 675 676 /* check if this is a vnode alias */ 677 if ((nvp = checkalias(vp, up->u_dev, ump->um_mountp)) != NULL) { 678 printf("found a vnode alias\n"); 679 /* 680 * Discard unneeded vnode, but save its udf_node. 681 * Note that the lock is carried over in the udf_node 682 */ 683 nvp->v_data = vp->v_data; 684 vp->v_data = NULL; 685 vp->v_op = spec_vnodeop_p; 686 vrele(vp); 687 vgone(vp); 688 /* 689 * Reinitialize aliased inode. 690 */ 691 vp = nvp; 692 ump->um_devvp = vp; 693 } 694 695 *vpp = vp; 696 697 return (0); 698 } 699 700 struct ifid { 701 u_short ifid_len; 702 u_short ifid_pad; 703 int ifid_ino; 704 long ifid_start; 705 }; 706 707 int 708 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 709 { 710 struct ifid *ifhp; 711 struct vnode *nvp; 712 int error; 713 714 ifhp = (struct ifid *)fhp; 715 716 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 717 *vpp = NULLVP; 718 return (error); 719 } 720 721 *vpp = nvp; 722 723 return (0); 724 } 725 726 int 727 udf_vptofh(struct vnode *vp, struct fid *fhp) 728 { 729 struct unode *up; 730 struct ifid *ifhp; 731 732 up = VTOU(vp); 733 ifhp = (struct ifid *)fhp; 734 ifhp->ifid_len = sizeof(struct ifid); 735 ifhp->ifid_ino = up->u_ino; 736 737 return (0); 738 } 739 740 int 741 udf_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, 742 size_t newlen, struct proc *p) 743 { 744 return (EINVAL); 745 } 746 747 int 748 udf_checkexp(struct mount *mp, struct mbuf *nam, int *exflagsp, 749 struct ucred **credanonp) 750 { 751 return (EACCES); /* For the time being */ 752 } 753 754 /* Handle a virtual partition map */ 755 int 756 udf_get_vpartmap(struct umount *ump, struct part_map_virt *pmv) 757 { 758 ump->um_flags |= UDF_MNT_FIND_VAT; /* Should do more than this */ 759 return (0); 760 } 761 762 /* Handle a sparable partition map */ 763 int 764 udf_get_spartmap(struct umount *ump, struct part_map_spare *pms) 765 { 766 struct buf *bp; 767 int i, error; 768 769 ump->um_stbl = malloc(letoh32(pms->st_size), M_UDFMOUNT, M_NOWAIT); 770 if (ump->um_stbl == NULL) 771 return (ENOMEM); 772 773 bzero(ump->um_stbl, letoh32(pms->st_size)); 774 775 /* Calculate the number of sectors per packet */ 776 ump->um_psecs = letoh16(pms->packet_len) / ump->um_bsize; 777 778 error = udf_readlblks(ump, letoh32(pms->st_loc[0]), 779 letoh32(pms->st_size), &bp); 780 781 if (error) { 782 if (bp != NULL) 783 brelse(bp); 784 free(ump->um_stbl, M_UDFMOUNT); 785 return (error); /* Failed to read sparing table */ 786 } 787 788 bcopy(bp->b_data, ump->um_stbl, letoh32(pms->st_size)); 789 brelse(bp); 790 bp = NULL; 791 792 if (udf_checktag(&ump->um_stbl->tag, 0)) { 793 free(ump->um_stbl, M_UDFMOUNT); 794 return (EINVAL); /* Invalid sparing table found */ 795 } 796 797 /* 798 * See how many valid entries there are here. The list is 799 * supposed to be sorted, 0xfffffff0 and higher are not valid. 800 */ 801 for (i = 0; i < letoh16(ump->um_stbl->rt_l); i++) { 802 ump->um_stbl_len = i; 803 if (letoh32(ump->um_stbl->entries[i].org) >= 0xfffffff0) 804 break; 805 } 806 807 return (0); 808 } 809 810 /* Handle a metadata partition map */ 811 int 812 udf_get_mpartmap(struct umount *ump, struct part_map_meta *pmm) 813 { 814 ump->um_flags |= UDF_MNT_USES_META; 815 ump->um_meta_start = pmm->meta_file_lbn; 816 return (0); 817 } 818 819 /* Scan the partition maps */ 820 int 821 udf_find_partmaps(struct umount *ump, struct logvol_desc *lvd) 822 { 823 struct regid *pmap_id; 824 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 825 int i, ptype, psize, error; 826 uint8_t *pmap = (uint8_t *) &lvd->maps[0]; 827 828 for (i = 0; i < letoh32(lvd->n_pm); i++) { 829 ptype = pmap[0]; 830 psize = pmap[1]; 831 832 if (ptype != 1 && ptype != 2) 833 return (EINVAL); /* Invalid partition map type */ 834 835 if (psize != sizeof(struct part_map_1) && 836 psize != sizeof(struct part_map_2)) 837 return (EINVAL); /* Invalid partition map size */ 838 839 if (ptype == 1) { 840 pmap += sizeof(struct part_map_1); 841 continue; 842 } 843 844 /* Type 2 map. Find out the details */ 845 pmap_id = (struct regid *) &pmap[4]; 846 regid_id[UDF_REGID_ID_SIZE] = '\0'; 847 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 848 849 if (!bcmp(®id_id[0], "*UDF Virtual Partition", 850 UDF_REGID_ID_SIZE)) 851 error = udf_get_vpartmap(ump, 852 (struct part_map_virt *) pmap); 853 else if (!bcmp(®id_id[0], "*UDF Sparable Partition", 854 UDF_REGID_ID_SIZE)) 855 error = udf_get_spartmap(ump, 856 (struct part_map_spare *) pmap); 857 else if (!bcmp(®id_id[0], "*UDF Metadata Partition", 858 UDF_REGID_ID_SIZE)) 859 error = udf_get_mpartmap(ump, 860 (struct part_map_meta *) pmap); 861 else 862 return (EINVAL); /* Unsupported partition map */ 863 864 if (error) 865 return (error); /* Error getting partition */ 866 867 pmap += sizeof(struct part_map_2); 868 } 869 870 return (0); 871 } 872