1 /* $OpenBSD: udf_vfsops.c,v 1.52 2016/06/19 11:54:33 natano 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/dirent.h> 55 #include <sys/fcntl.h> 56 #include <sys/kernel.h> 57 #include <sys/malloc.h> 58 #include <sys/mutex.h> 59 #include <sys/mount.h> 60 #include <sys/namei.h> 61 #include <sys/pool.h> 62 #include <sys/proc.h> 63 #include <sys/lock.h> 64 #include <sys/queue.h> 65 #include <sys/vnode.h> 66 #include <sys/lock.h> 67 #include <sys/endian.h> 68 #include <sys/specdev.h> 69 70 #include <crypto/siphash.h> 71 72 #include <isofs/udf/ecma167-udf.h> 73 #include <isofs/udf/udf.h> 74 #include <isofs/udf/udf_extern.h> 75 76 struct pool udf_trans_pool; 77 struct pool unode_pool; 78 struct pool udf_ds_pool; 79 80 int udf_find_partmaps(struct umount *, struct logvol_desc *); 81 int udf_get_vpartmap(struct umount *, struct part_map_virt *); 82 int udf_get_spartmap(struct umount *, struct part_map_spare *); 83 int udf_get_mpartmap(struct umount *, struct part_map_meta *); 84 int udf_mountfs(struct vnode *, struct mount *, uint32_t, struct proc *); 85 86 const struct vfsops udf_vfsops = { 87 .vfs_fhtovp = udf_fhtovp, 88 .vfs_init = udf_init, 89 .vfs_mount = udf_mount, 90 .vfs_start = udf_start, 91 .vfs_root = udf_root, 92 .vfs_quotactl = udf_quotactl, 93 .vfs_statfs = udf_statfs, 94 .vfs_sync = udf_sync, 95 .vfs_unmount = udf_unmount, 96 .vfs_vget = udf_vget, 97 .vfs_vptofh = udf_vptofh, 98 .vfs_sysctl = udf_sysctl, 99 .vfs_checkexp = udf_checkexp, 100 }; 101 102 int 103 udf_init(struct vfsconf *foo) 104 { 105 pool_init(&udf_trans_pool, MAXNAMLEN * sizeof(unicode_t), 0, 0, 106 PR_WAITOK, "udftrpl", NULL); 107 pool_init(&unode_pool, sizeof(struct unode), 0, 0, 108 PR_WAITOK, "udfndpl", NULL); 109 pool_init(&udf_ds_pool, sizeof(struct udf_dirstream), 0, 0, 110 PR_WAITOK, "udfdspl", NULL); 111 112 return (0); 113 } 114 115 int 116 udf_start(struct mount *mp, int flags, struct proc *p) 117 { 118 return (0); 119 } 120 121 int 122 udf_mount(struct mount *mp, const char *path, void *data, 123 struct nameidata *ndp, struct proc *p) 124 { 125 struct vnode *devvp; /* vnode of the mount device */ 126 struct udf_args args; 127 char fspec[MNAMELEN]; 128 int error; 129 130 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 131 mp->mnt_flag |= MNT_RDONLY; 132 #ifdef UDF_DEBUG 133 printf("udf_mount: enforcing read-only mode\n"); 134 #endif 135 } 136 137 /* 138 * No root filesystem support. Probably not a big deal, since the 139 * bootloader doesn't understand UDF. 140 */ 141 if (mp->mnt_flag & MNT_ROOTFS) 142 return (EOPNOTSUPP); 143 144 error = copyin(data, &args, sizeof(struct udf_args)); 145 if (error) 146 return (error); 147 148 if (args.fspec == NULL) 149 return (EINVAL); 150 151 error = copyinstr(args.fspec, fspec, sizeof(fspec), NULL); 152 if (error) 153 return (error); 154 155 NDINIT(ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, p); 156 if ((error = namei(ndp))) 157 return (error); 158 159 devvp = ndp->ni_vp; 160 if (devvp->v_type != VBLK) { 161 vrele(devvp); 162 return (ENOTBLK); 163 } 164 165 if (major(devvp->v_rdev) >= nblkdev) { 166 vrele(devvp); 167 return (ENXIO); 168 } 169 170 /* Check the access rights on the mount device */ 171 if (p->p_ucred->cr_uid) { 172 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 173 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 174 VOP_UNLOCK(devvp, p); 175 if (error) { 176 vrele(devvp); 177 return (error); 178 } 179 } 180 181 if ((error = udf_mountfs(devvp, mp, args.lastblock, p))) { 182 vrele(devvp); 183 return (error); 184 } 185 186 /* 187 * Keep a copy of the mount information. 188 */ 189 bzero(mp->mnt_stat.f_mntonname, MNAMELEN); 190 strlcpy(mp->mnt_stat.f_mntonname, path, MNAMELEN); 191 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN); 192 strlcpy(mp->mnt_stat.f_mntfromname, fspec, MNAMELEN); 193 bzero(mp->mnt_stat.f_mntfromspec, MNAMELEN); 194 strlcpy(mp->mnt_stat.f_mntfromspec, fspec, MNAMELEN); 195 196 return (0); 197 }; 198 199 /* 200 * Check the descriptor tag for both the correct id and correct checksum. 201 * Return zero if all is good, EINVAL if not. 202 */ 203 int 204 udf_checktag(struct desc_tag *tag, uint16_t id) 205 { 206 uint8_t *itag; 207 uint8_t i, cksum = 0; 208 209 itag = (uint8_t *)tag; 210 211 if (letoh16(tag->id) != id) 212 return (EINVAL); 213 214 for (i = 0; i < 15; i++) 215 cksum = cksum + itag[i]; 216 cksum = cksum - itag[4]; 217 218 if (cksum == tag->cksum) 219 return (0); 220 221 return (EINVAL); 222 } 223 224 int 225 udf_mountfs(struct vnode *devvp, struct mount *mp, uint32_t lb, struct proc *p) 226 { 227 struct buf *bp = NULL; 228 struct anchor_vdp avdp; 229 struct umount *ump = NULL; 230 struct part_desc *pd; 231 struct logvol_desc *lvd; 232 struct fileset_desc *fsd; 233 struct extfile_entry *xfentry; 234 struct file_entry *fentry; 235 uint32_t sector, size, mvds_start, mvds_end; 236 uint32_t fsd_offset = 0; 237 uint16_t part_num = 0, fsd_part = 0; 238 int error = EINVAL; 239 int logvol_found = 0, part_found = 0, fsd_found = 0; 240 int bsize; 241 242 /* 243 * Disallow multiple mounts of the same device. 244 * Disallow mounting of a device that is currently in use 245 * (except for root, which might share swap device for miniroot). 246 * Flush out any old buffers remaining from a previous use. 247 */ 248 if ((error = vfs_mountedon(devvp))) 249 return (error); 250 if (vcount(devvp) > 1 && devvp != rootvp) 251 return (EBUSY); 252 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 253 error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0); 254 VOP_UNLOCK(devvp, p); 255 if (error) 256 return (error); 257 258 error = VOP_OPEN(devvp, FREAD, FSCRED, p); 259 if (error) 260 return (error); 261 262 ump = malloc(sizeof(*ump), M_UDFMOUNT, M_WAITOK | M_ZERO); 263 264 mp->mnt_data = (qaddr_t) ump; 265 mp->mnt_stat.f_fsid.val[0] = devvp->v_rdev; 266 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 267 mp->mnt_stat.f_namemax = NAME_MAX; 268 mp->mnt_flag |= MNT_LOCAL; 269 270 ump->um_mountp = mp; 271 ump->um_dev = devvp->v_rdev; 272 ump->um_devvp = devvp; 273 274 bsize = 2048; /* Should probe the media for its size. */ 275 276 /* 277 * Get the Anchor Volume Descriptor Pointer from sector 256. 278 * Should also check sector n - 256, n, and 512. 279 */ 280 sector = 256; 281 if ((error = bread(devvp, sector * btodb(bsize), bsize, &bp)) != 0) 282 goto bail; 283 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 284 goto bail; 285 286 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 287 brelse(bp); 288 bp = NULL; 289 290 /* 291 * Extract the Partition Descriptor and Logical Volume Descriptor 292 * from the Volume Descriptor Sequence. 293 * Should we care about the partition type right now? 294 * What about multiple partitions? 295 */ 296 mvds_start = letoh32(avdp.main_vds_ex.loc); 297 mvds_end = mvds_start + (letoh32(avdp.main_vds_ex.len) - 1) / bsize; 298 for (sector = mvds_start; sector < mvds_end; sector++) { 299 if ((error = bread(devvp, sector * btodb(bsize), bsize, 300 &bp)) != 0) { 301 printf("Can't read sector %d of VDS\n", sector); 302 goto bail; 303 } 304 lvd = (struct logvol_desc *)bp->b_data; 305 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 306 ump->um_bsize = letoh32(lvd->lb_size); 307 ump->um_bmask = ump->um_bsize - 1; 308 ump->um_bshift = ffs(ump->um_bsize) - 1; 309 fsd_part = letoh16(lvd->_lvd_use.fsd_loc.loc.part_num); 310 fsd_offset = letoh32(lvd->_lvd_use.fsd_loc.loc.lb_num); 311 if (udf_find_partmaps(ump, lvd)) 312 break; 313 logvol_found = 1; 314 } 315 pd = (struct part_desc *)bp->b_data; 316 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 317 part_found = 1; 318 part_num = letoh16(pd->part_num); 319 ump->um_len = ump->um_reallen = letoh32(pd->part_len); 320 ump->um_start = ump->um_realstart = letoh32(pd->start_loc); 321 } 322 323 brelse(bp); 324 bp = NULL; 325 if ((part_found) && (logvol_found)) 326 break; 327 } 328 329 if (!part_found || !logvol_found) { 330 error = EINVAL; 331 goto bail; 332 } 333 334 if (ISSET(ump->um_flags, UDF_MNT_USES_META)) { 335 /* Read Metadata File 'File Entry' to find Metadata file. */ 336 struct long_ad *la; 337 sector = ump->um_start + ump->um_meta_start; /* Set in udf_get_mpartmap() */ 338 if ((error = RDSECTOR(devvp, sector, ump->um_bsize, &bp)) != 0) { 339 printf("Cannot read sector %d for Metadata File Entry\n", sector); 340 error = EINVAL; 341 goto bail; 342 } 343 xfentry = (struct extfile_entry *)bp->b_data; 344 fentry = (struct file_entry *)bp->b_data; 345 if (udf_checktag(&xfentry->tag, TAGID_EXTFENTRY) == 0) 346 la = (struct long_ad *)&xfentry->data[letoh32(xfentry->l_ea)]; 347 else if (udf_checktag(&fentry->tag, TAGID_FENTRY) == 0) 348 la = (struct long_ad *)&fentry->data[letoh32(fentry->l_ea)]; 349 else { 350 printf("Invalid Metadata File FE @ sector %d! (tag.id %d)\n", 351 sector, fentry->tag.id); 352 error = EINVAL; 353 goto bail; 354 } 355 ump->um_meta_start = letoh32(la->loc.lb_num); 356 ump->um_meta_len = letoh32(la->len); 357 if (bp != NULL) { 358 brelse(bp); 359 bp = NULL; 360 } 361 } else if (fsd_part != part_num) { 362 printf("FSD does not lie within the partition!\n"); 363 error = EINVAL; 364 goto bail; 365 } 366 367 mtx_init(&ump->um_hashmtx, IPL_NONE); 368 ump->um_hashtbl = hashinit(UDF_HASHTBLSIZE, M_UDFMOUNT, M_WAITOK, 369 &ump->um_hashsz); 370 arc4random_buf(&ump->um_hashkey, sizeof(ump->um_hashkey)); 371 372 /* Get the VAT, if needed */ 373 if (ump->um_flags & UDF_MNT_FIND_VAT) { 374 error = udf_vat_get(ump, lb); 375 if (error) 376 goto bail; 377 } 378 379 /* 380 * Grab the Fileset Descriptor 381 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 382 * me in the right direction here. 383 */ 384 385 if (ISSET(ump->um_flags, UDF_MNT_USES_META)) 386 sector = ump->um_meta_start; 387 else 388 sector = fsd_offset; 389 udf_vat_map(ump, §or); 390 if ((error = RDSECTOR(devvp, sector, ump->um_bsize, &bp)) != 0) { 391 printf("Cannot read sector %d of FSD\n", sector); 392 goto bail; 393 } 394 fsd = (struct fileset_desc *)bp->b_data; 395 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 396 fsd_found = 1; 397 bcopy(&fsd->rootdir_icb, &ump->um_root_icb, 398 sizeof(struct long_ad)); 399 if (ISSET(ump->um_flags, UDF_MNT_USES_META)) { 400 ump->um_root_icb.loc.lb_num += ump->um_meta_start; 401 ump->um_root_icb.loc.part_num = part_num; 402 } 403 } 404 405 brelse(bp); 406 bp = NULL; 407 408 if (!fsd_found) { 409 printf("Couldn't find the fsd\n"); 410 error = EINVAL; 411 goto bail; 412 } 413 414 /* 415 * Find the file entry for the root directory. 416 */ 417 sector = letoh32(ump->um_root_icb.loc.lb_num); 418 size = letoh32(ump->um_root_icb.len); 419 udf_vat_map(ump, §or); 420 if ((error = udf_readlblks(ump, sector, size, &bp)) != 0) { 421 printf("Cannot read sector %d\n", sector); 422 goto bail; 423 } 424 425 xfentry = (struct extfile_entry *)bp->b_data; 426 fentry = (struct file_entry *)bp->b_data; 427 error = udf_checktag(&xfentry->tag, TAGID_EXTFENTRY); 428 if (error) { 429 error = udf_checktag(&fentry->tag, TAGID_FENTRY); 430 if (error) { 431 printf("Invalid root file entry!\n"); 432 goto bail; 433 } 434 } 435 436 brelse(bp); 437 bp = NULL; 438 439 devvp->v_specmountpoint = mp; 440 441 return (0); 442 443 bail: 444 if (ump->um_hashtbl != NULL) 445 free(ump->um_hashtbl, M_UDFMOUNT, 0); 446 447 if (ump != NULL) { 448 free(ump, M_UDFMOUNT, 0); 449 mp->mnt_data = NULL; 450 mp->mnt_flag &= ~MNT_LOCAL; 451 } 452 if (devvp->v_specinfo) 453 devvp->v_specmountpoint = NULL; 454 if (bp != NULL) 455 brelse(bp); 456 457 vn_lock(devvp, LK_EXCLUSIVE|LK_RETRY, p); 458 VOP_CLOSE(devvp, FREAD, FSCRED, p); 459 VOP_UNLOCK(devvp, p); 460 461 return (error); 462 } 463 464 int 465 udf_unmount(struct mount *mp, int mntflags, struct proc *p) 466 { 467 struct umount *ump; 468 struct vnode *devvp; 469 int error, flags = 0; 470 471 ump = VFSTOUDFFS(mp); 472 devvp = ump->um_devvp; 473 474 if (mntflags & MNT_FORCE) 475 flags |= FORCECLOSE; 476 477 if ((error = vflush(mp, NULL, flags))) 478 return (error); 479 480 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 481 vinvalbuf(devvp, V_SAVE, NOCRED, p, 0, 0); 482 (void)VOP_CLOSE(devvp, FREAD, NOCRED, p); 483 VOP_UNLOCK(devvp, p); 484 485 devvp->v_specmountpoint = NULL; 486 vrele(devvp); 487 488 if (ump->um_flags & UDF_MNT_USES_VAT) 489 free(ump->um_vat, M_UDFMOUNT, 0); 490 491 if (ump->um_stbl != NULL) 492 free(ump->um_stbl, M_UDFMOUNT, 0); 493 494 if (ump->um_hashtbl != NULL) 495 free(ump->um_hashtbl, M_UDFMOUNT, 0); 496 497 free(ump, M_UDFMOUNT, 0); 498 499 mp->mnt_data = NULL; 500 mp->mnt_flag &= ~MNT_LOCAL; 501 502 return (0); 503 } 504 505 int 506 udf_root(struct mount *mp, struct vnode **vpp) 507 { 508 struct umount *ump; 509 struct vnode *vp; 510 udfino_t id; 511 int error; 512 513 ump = VFSTOUDFFS(mp); 514 515 id = udf_getid(&ump->um_root_icb); 516 517 error = udf_vget(mp, id, vpp); 518 if (error) 519 return (error); 520 521 vp = *vpp; 522 vp->v_flag |= VROOT; 523 524 return (0); 525 } 526 527 int 528 udf_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 529 struct proc *p) 530 { 531 return (EOPNOTSUPP); 532 } 533 534 int 535 udf_statfs(struct mount *mp, struct statfs *sbp, struct proc *p) 536 { 537 struct umount *ump; 538 539 ump = VFSTOUDFFS(mp); 540 541 sbp->f_bsize = ump->um_bsize; 542 sbp->f_iosize = ump->um_bsize; 543 sbp->f_blocks = ump->um_len; 544 sbp->f_bfree = 0; 545 sbp->f_bavail = 0; 546 sbp->f_files = 0; 547 sbp->f_ffree = 0; 548 sbp->f_favail = 0; 549 copy_statfs_info(sbp, mp); 550 551 return (0); 552 } 553 554 int 555 udf_sync(struct mount *mp, int waitfor, struct ucred *cred, struct proc *p) 556 { 557 return (0); 558 } 559 560 int 561 udf_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 562 { 563 struct buf *bp; 564 struct vnode *devvp; 565 struct umount *ump; 566 struct proc *p; 567 struct vnode *vp, *nvp; 568 struct unode *up; 569 struct extfile_entry *xfe; 570 struct file_entry *fe; 571 uint32_t sector; 572 int error, size; 573 574 if (ino > (udfino_t)-1) 575 panic("udf_vget: alien ino_t %llu", (unsigned long long)ino); 576 577 p = curproc; 578 bp = NULL; 579 *vpp = NULL; 580 ump = VFSTOUDFFS(mp); 581 582 /* See if we already have this in the cache */ 583 if ((error = udf_hashlookup(ump, ino, LK_EXCLUSIVE, vpp)) != 0) 584 return (error); 585 if (*vpp != NULL) 586 return (0); 587 588 /* 589 * Allocate memory and check the tag id's before grabbing a new 590 * vnode, since it's hard to roll back if there is a problem. 591 */ 592 up = pool_get(&unode_pool, PR_WAITOK | PR_ZERO); 593 594 /* 595 * Copy in the file entry. Per the spec, the size can only be 1 block. 596 */ 597 sector = ino; 598 devvp = ump->um_devvp; 599 udf_vat_map(ump, §or); 600 if ((error = RDSECTOR(devvp, sector, ump->um_bsize, &bp)) != 0) { 601 printf("Cannot read sector %d\n", sector); 602 pool_put(&unode_pool, up); 603 if (bp != NULL) 604 brelse(bp); 605 return (error); 606 } 607 608 xfe = (struct extfile_entry *)bp->b_data; 609 fe = (struct file_entry *)bp->b_data; 610 error = udf_checktag(&xfe->tag, TAGID_EXTFENTRY); 611 if (error == 0) { 612 size = letoh32(xfe->l_ea) + letoh32(xfe->l_ad); 613 } else { 614 error = udf_checktag(&fe->tag, TAGID_FENTRY); 615 if (error) { 616 printf("Invalid file entry!\n"); 617 pool_put(&unode_pool, up); 618 if (bp != NULL) 619 brelse(bp); 620 return (ENOMEM); 621 } else 622 size = letoh32(fe->l_ea) + letoh32(fe->l_ad); 623 } 624 625 /* Allocate max size of FE/XFE. */ 626 up->u_fentry = malloc(size + UDF_EXTFENTRY_SIZE, M_UDFFENTRY, M_NOWAIT | M_ZERO); 627 if (up->u_fentry == NULL) { 628 pool_put(&unode_pool, up); 629 if (bp != NULL) 630 brelse(bp); 631 return (ENOMEM); /* Cannot allocate file entry block */ 632 } 633 634 if (udf_checktag(&xfe->tag, TAGID_EXTFENTRY) == 0) 635 bcopy(bp->b_data, up->u_fentry, size + UDF_EXTFENTRY_SIZE); 636 else 637 bcopy(bp->b_data, up->u_fentry, size + UDF_FENTRY_SIZE); 638 639 brelse(bp); 640 bp = NULL; 641 642 if ((error = udf_allocv(mp, &vp, p))) { 643 free(up->u_fentry, M_UDFFENTRY, 0); 644 pool_put(&unode_pool, up); 645 return (error); /* Error from udf_allocv() */ 646 } 647 648 up->u_vnode = vp; 649 up->u_ino = ino; 650 up->u_devvp = ump->um_devvp; 651 up->u_dev = ump->um_dev; 652 up->u_ump = ump; 653 vp->v_data = up; 654 vref(ump->um_devvp); 655 656 rrw_init(&up->u_lock, "unode"); 657 658 /* 659 * udf_hashins() will lock the vnode for us. 660 */ 661 udf_hashins(up); 662 663 switch (up->u_fentry->icbtag.file_type) { 664 default: 665 printf("Unrecognized file type (%d)\n", vp->v_type); 666 vp->v_type = VREG; 667 break; 668 case UDF_ICB_FILETYPE_DIRECTORY: 669 vp->v_type = VDIR; 670 break; 671 case UDF_ICB_FILETYPE_BLOCKDEVICE: 672 vp->v_type = VBLK; 673 break; 674 case UDF_ICB_FILETYPE_CHARDEVICE: 675 vp->v_type = VCHR; 676 break; 677 case UDF_ICB_FILETYPE_FIFO: 678 vp->v_type = VFIFO; 679 break; 680 case UDF_ICB_FILETYPE_SOCKET: 681 vp->v_type = VSOCK; 682 break; 683 case UDF_ICB_FILETYPE_SYMLINK: 684 vp->v_type = VLNK; 685 break; 686 case UDF_ICB_FILETYPE_RANDOMACCESS: 687 case UDF_ICB_FILETYPE_REALTIME: 688 case UDF_ICB_FILETYPE_UNKNOWN: 689 vp->v_type = VREG; 690 break; 691 } 692 693 /* check if this is a vnode alias */ 694 if ((nvp = checkalias(vp, up->u_dev, ump->um_mountp)) != NULL) { 695 printf("found a vnode alias\n"); 696 /* 697 * Discard unneeded vnode, but save its udf_node. 698 * Note that the lock is carried over in the udf_node 699 */ 700 nvp->v_data = vp->v_data; 701 vp->v_data = NULL; 702 vp->v_op = &spec_vops; 703 vrele(vp); 704 vgone(vp); 705 /* 706 * Reinitialize aliased inode. 707 */ 708 vp = nvp; 709 ump->um_devvp = vp; 710 } 711 712 *vpp = vp; 713 714 return (0); 715 } 716 717 struct ifid { 718 u_short ifid_len; 719 u_short ifid_pad; 720 int ifid_ino; 721 long ifid_start; 722 }; 723 724 int 725 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 726 { 727 struct ifid *ifhp; 728 struct vnode *nvp; 729 int error; 730 731 ifhp = (struct ifid *)fhp; 732 733 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 734 *vpp = NULLVP; 735 return (error); 736 } 737 738 *vpp = nvp; 739 740 return (0); 741 } 742 743 int 744 udf_vptofh(struct vnode *vp, struct fid *fhp) 745 { 746 struct unode *up; 747 struct ifid *ifhp; 748 749 up = VTOU(vp); 750 ifhp = (struct ifid *)fhp; 751 ifhp->ifid_len = sizeof(struct ifid); 752 ifhp->ifid_ino = up->u_ino; 753 754 return (0); 755 } 756 757 int 758 udf_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, 759 size_t newlen, struct proc *p) 760 { 761 return (EINVAL); 762 } 763 764 int 765 udf_checkexp(struct mount *mp, struct mbuf *nam, int *exflagsp, 766 struct ucred **credanonp) 767 { 768 return (EACCES); /* For the time being */ 769 } 770 771 /* Handle a virtual partition map */ 772 int 773 udf_get_vpartmap(struct umount *ump, struct part_map_virt *pmv) 774 { 775 ump->um_flags |= UDF_MNT_FIND_VAT; /* Should do more than this */ 776 return (0); 777 } 778 779 /* Handle a sparable partition map */ 780 int 781 udf_get_spartmap(struct umount *ump, struct part_map_spare *pms) 782 { 783 struct buf *bp; 784 int i, error; 785 786 ump->um_stbl = malloc(letoh32(pms->st_size), M_UDFMOUNT, M_NOWAIT); 787 if (ump->um_stbl == NULL) 788 return (ENOMEM); 789 790 bzero(ump->um_stbl, letoh32(pms->st_size)); 791 792 /* Calculate the number of sectors per packet */ 793 ump->um_psecs = letoh16(pms->packet_len) / ump->um_bsize; 794 795 error = udf_readlblks(ump, letoh32(pms->st_loc[0]), 796 letoh32(pms->st_size), &bp); 797 798 if (error) { 799 if (bp != NULL) 800 brelse(bp); 801 free(ump->um_stbl, M_UDFMOUNT, 0); 802 return (error); /* Failed to read sparing table */ 803 } 804 805 bcopy(bp->b_data, ump->um_stbl, letoh32(pms->st_size)); 806 brelse(bp); 807 bp = NULL; 808 809 if (udf_checktag(&ump->um_stbl->tag, 0)) { 810 free(ump->um_stbl, M_UDFMOUNT, 0); 811 return (EINVAL); /* Invalid sparing table found */ 812 } 813 814 /* 815 * See how many valid entries there are here. The list is 816 * supposed to be sorted, 0xfffffff0 and higher are not valid. 817 */ 818 for (i = 0; i < letoh16(ump->um_stbl->rt_l); i++) { 819 ump->um_stbl_len = i; 820 if (letoh32(ump->um_stbl->entries[i].org) >= 0xfffffff0) 821 break; 822 } 823 824 return (0); 825 } 826 827 /* Handle a metadata partition map */ 828 int 829 udf_get_mpartmap(struct umount *ump, struct part_map_meta *pmm) 830 { 831 ump->um_flags |= UDF_MNT_USES_META; 832 ump->um_meta_start = pmm->meta_file_lbn; 833 return (0); 834 } 835 836 /* Scan the partition maps */ 837 int 838 udf_find_partmaps(struct umount *ump, struct logvol_desc *lvd) 839 { 840 struct regid *pmap_id; 841 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 842 int i, ptype, psize, error; 843 uint8_t *pmap = (uint8_t *) &lvd->maps[0]; 844 845 for (i = 0; i < letoh32(lvd->n_pm); i++) { 846 ptype = pmap[0]; 847 psize = pmap[1]; 848 849 if (ptype != 1 && ptype != 2) 850 return (EINVAL); /* Invalid partition map type */ 851 852 if (psize != sizeof(struct part_map_1) && 853 psize != sizeof(struct part_map_2)) 854 return (EINVAL); /* Invalid partition map size */ 855 856 if (ptype == 1) { 857 pmap += sizeof(struct part_map_1); 858 continue; 859 } 860 861 /* Type 2 map. Find out the details */ 862 pmap_id = (struct regid *) &pmap[4]; 863 regid_id[UDF_REGID_ID_SIZE] = '\0'; 864 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 865 866 if (!bcmp(®id_id[0], "*UDF Virtual Partition", 867 UDF_REGID_ID_SIZE)) 868 error = udf_get_vpartmap(ump, 869 (struct part_map_virt *) pmap); 870 else if (!bcmp(®id_id[0], "*UDF Sparable Partition", 871 UDF_REGID_ID_SIZE)) 872 error = udf_get_spartmap(ump, 873 (struct part_map_spare *) pmap); 874 else if (!bcmp(®id_id[0], "*UDF Metadata Partition", 875 UDF_REGID_ID_SIZE)) 876 error = udf_get_mpartmap(ump, 877 (struct part_map_meta *) pmap); 878 else 879 return (EINVAL); /* Unsupported partition map */ 880 881 if (error) 882 return (error); /* Error getting partition */ 883 884 pmap += sizeof(struct part_map_2); 885 } 886 887 return (0); 888 } 889