1 /*- 2 * Copyright (c) 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley 6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 7 * Support code is derived from software contributed to Berkeley 8 * by Atsushi Murai (amurai@spec.co.jp). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/priv.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/vnode.h> 47 #include <sys/mount.h> 48 #include <sys/bio.h> 49 #include <sys/buf.h> 50 #include <sys/cdio.h> 51 #include <sys/conf.h> 52 #include <sys/fcntl.h> 53 #include <sys/malloc.h> 54 #include <sys/stat.h> 55 #include <sys/syslog.h> 56 #include <sys/iconv.h> 57 58 #include <fs/cd9660/iso.h> 59 #include <fs/cd9660/iso_rrip.h> 60 #include <fs/cd9660/cd9660_node.h> 61 #include <fs/cd9660/cd9660_mount.h> 62 63 #include <geom/geom.h> 64 #include <geom/geom_vfs.h> 65 66 MALLOC_DEFINE(M_ISOFSMNT, "isofs_mount", "ISOFS mount structure"); 67 MALLOC_DEFINE(M_ISOFSNODE, "isofs_node", "ISOFS vnode private part"); 68 69 struct iconv_functions *cd9660_iconv = NULL; 70 71 static vfs_mount_t cd9660_mount; 72 static vfs_cmount_t cd9660_cmount; 73 static vfs_unmount_t cd9660_unmount; 74 static vfs_root_t cd9660_root; 75 static vfs_statfs_t cd9660_statfs; 76 static vfs_vget_t cd9660_vget; 77 static vfs_fhtovp_t cd9660_fhtovp; 78 79 static struct vfsops cd9660_vfsops = { 80 .vfs_fhtovp = cd9660_fhtovp, 81 .vfs_mount = cd9660_mount, 82 .vfs_cmount = cd9660_cmount, 83 .vfs_root = cd9660_root, 84 .vfs_statfs = cd9660_statfs, 85 .vfs_unmount = cd9660_unmount, 86 .vfs_vget = cd9660_vget, 87 }; 88 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 89 MODULE_VERSION(cd9660, 1); 90 91 static int iso_mountfs(struct vnode *devvp, struct mount *mp); 92 93 /* 94 * VFS Operations. 95 */ 96 97 static int 98 cd9660_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 99 { 100 struct iso_args args; 101 int error; 102 103 error = copyin(data, &args, sizeof args); 104 if (error) 105 return (error); 106 107 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 108 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 109 ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64); 110 ma = mount_argsu(ma, "cs_local", args.cs_local, 64); 111 ma = mount_argf(ma, "ssector", "%u", args.ssector); 112 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip"); 113 ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens"); 114 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt"); 115 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet"); 116 ma = mount_argb(ma, 117 args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet"); 118 ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv"); 119 120 error = kernel_mount(ma, flags); 121 122 return (error); 123 } 124 125 static int 126 cd9660_mount(struct mount *mp, struct thread *td) 127 { 128 struct vnode *devvp; 129 char *fspec; 130 int error; 131 accmode_t accmode; 132 struct nameidata ndp; 133 struct iso_mnt *imp = 0; 134 135 /* 136 * Unconditionally mount as read-only. 137 */ 138 MNT_ILOCK(mp); 139 mp->mnt_flag |= MNT_RDONLY; 140 MNT_IUNLOCK(mp); 141 142 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 143 if (error) 144 return (error); 145 146 imp = VFSTOISOFS(mp); 147 148 if (mp->mnt_flag & MNT_UPDATE) { 149 if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0)) 150 return (0); 151 } 152 /* 153 * Not an update, or updating the name: look up the name 154 * and verify that it refers to a sensible block device. 155 */ 156 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 157 if ((error = namei(&ndp))) 158 return (error); 159 NDFREE(&ndp, NDF_ONLY_PNBUF); 160 devvp = ndp.ni_vp; 161 162 if (!vn_isdisk(devvp, &error)) { 163 vput(devvp); 164 return (error); 165 } 166 167 /* 168 * Verify that user has necessary permissions on the device, 169 * or has superuser abilities 170 */ 171 accmode = VREAD; 172 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 173 if (error) 174 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 175 if (error) { 176 vput(devvp); 177 return (error); 178 } 179 180 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 181 error = iso_mountfs(devvp, mp); 182 if (error) 183 vrele(devvp); 184 } else { 185 if (devvp != imp->im_devvp) 186 error = EINVAL; /* needs translation */ 187 vput(devvp); 188 } 189 if (error) 190 return (error); 191 vfs_mountedfrom(mp, fspec); 192 return (0); 193 } 194 195 /* 196 * Common code for mount and mountroot 197 */ 198 static int 199 iso_mountfs(devvp, mp) 200 struct vnode *devvp; 201 struct mount *mp; 202 { 203 struct iso_mnt *isomp = (struct iso_mnt *)0; 204 struct buf *bp = NULL; 205 struct buf *pribp = NULL, *supbp = NULL; 206 struct cdev *dev = devvp->v_rdev; 207 int error = EINVAL; 208 int high_sierra = 0; 209 int iso_bsize; 210 int iso_blknum; 211 int joliet_level; 212 struct iso_volume_descriptor *vdp = 0; 213 struct iso_primary_descriptor *pri = NULL; 214 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 215 struct iso_supplementary_descriptor *sup = NULL; 216 struct iso_directory_record *rootp; 217 int logical_block_size, ssector; 218 struct g_consumer *cp; 219 struct bufobj *bo; 220 char *cs_local, *cs_disk; 221 222 DROP_GIANT(); 223 g_topology_lock(); 224 error = g_vfs_open(devvp, &cp, "cd9660", 0); 225 g_topology_unlock(); 226 PICKUP_GIANT(); 227 VOP_UNLOCK(devvp, 0); 228 if (error) 229 return error; 230 if (devvp->v_rdev->si_iosize_max != 0) 231 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 232 if (mp->mnt_iosize_max > MAXPHYS) 233 mp->mnt_iosize_max = MAXPHYS; 234 235 bo = &devvp->v_bufobj; 236 bo->bo_private = cp; 237 bo->bo_ops = g_vfs_bufops; 238 239 /* This is the "logical sector size". The standard says this 240 * should be 2048 or the physical sector size on the device, 241 * whichever is greater. 242 */ 243 if ((ISO_DEFAULT_BLOCK_SIZE % cp->provider->sectorsize) != 0) { 244 DROP_GIANT(); 245 g_topology_lock(); 246 g_vfs_close(cp); 247 g_topology_unlock(); 248 PICKUP_GIANT(); 249 return (EINVAL); 250 } 251 252 iso_bsize = cp->provider->sectorsize; 253 254 joliet_level = 0; 255 if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector)) 256 ssector = 0; 257 for (iso_blknum = 16 + ssector; 258 iso_blknum < 100 + ssector; 259 iso_blknum++) { 260 if ((error = bread(devvp, iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE), 261 iso_bsize, NOCRED, &bp)) != 0) 262 goto out; 263 264 vdp = (struct iso_volume_descriptor *)bp->b_data; 265 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 266 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 267 sizeof vdp->id) != 0) { 268 error = EINVAL; 269 goto out; 270 } else 271 high_sierra = 1; 272 } 273 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 274 case ISO_VD_PRIMARY: 275 if (pribp == NULL) { 276 pribp = bp; 277 bp = NULL; 278 pri = (struct iso_primary_descriptor *)vdp; 279 pri_sierra = 280 (struct iso_sierra_primary_descriptor *)vdp; 281 } 282 break; 283 284 case ISO_VD_SUPPLEMENTARY: 285 if (supbp == NULL) { 286 supbp = bp; 287 bp = NULL; 288 sup = (struct iso_supplementary_descriptor *)vdp; 289 290 if (!vfs_flagopt(mp->mnt_optnew, "nojoliet", NULL, 0)) { 291 if (bcmp(sup->escape, "%/@", 3) == 0) 292 joliet_level = 1; 293 if (bcmp(sup->escape, "%/C", 3) == 0) 294 joliet_level = 2; 295 if (bcmp(sup->escape, "%/E", 3) == 0) 296 joliet_level = 3; 297 298 if ((isonum_711 (sup->flags) & 1) && 299 !vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0)) 300 joliet_level = 0; 301 } 302 } 303 break; 304 305 case ISO_VD_END: 306 goto vd_end; 307 308 default: 309 break; 310 } 311 if (bp) { 312 brelse(bp); 313 bp = NULL; 314 } 315 } 316 vd_end: 317 if (bp) { 318 brelse(bp); 319 bp = NULL; 320 } 321 322 if (pri == NULL) { 323 error = EINVAL; 324 goto out; 325 } 326 327 logical_block_size = 328 isonum_723 (high_sierra? 329 pri_sierra->logical_block_size: 330 pri->logical_block_size); 331 332 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 333 || (logical_block_size & (logical_block_size - 1)) != 0) { 334 error = EINVAL; 335 goto out; 336 } 337 338 rootp = (struct iso_directory_record *) 339 (high_sierra? 340 pri_sierra->root_directory_record: 341 pri->root_directory_record); 342 343 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 344 isomp->im_cp = cp; 345 isomp->im_bo = bo; 346 isomp->logical_block_size = logical_block_size; 347 isomp->volume_space_size = 348 isonum_733 (high_sierra? 349 pri_sierra->volume_space_size: 350 pri->volume_space_size); 351 isomp->joliet_level = 0; 352 /* 353 * Since an ISO9660 multi-session CD can also access previous 354 * sessions, we have to include them into the space consider- 355 * ations. This doesn't yield a very accurate number since 356 * parts of the old sessions might be inaccessible now, but we 357 * can't do much better. This is also important for the NFS 358 * filehandle validation. 359 */ 360 isomp->volume_space_size += ssector; 361 bcopy (rootp, isomp->root, sizeof isomp->root); 362 isomp->root_extent = isonum_733 (rootp->extent); 363 isomp->root_size = isonum_733 (rootp->size); 364 365 isomp->im_bmask = logical_block_size - 1; 366 isomp->im_bshift = ffs(logical_block_size) - 1; 367 368 pribp->b_flags |= B_AGE; 369 brelse(pribp); 370 pribp = NULL; 371 372 mp->mnt_data = isomp; 373 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 374 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 375 mp->mnt_maxsymlinklen = 0; 376 MNT_ILOCK(mp); 377 mp->mnt_flag |= MNT_LOCAL; 378 MNT_IUNLOCK(mp); 379 isomp->im_mountp = mp; 380 isomp->im_dev = dev; 381 isomp->im_devvp = devvp; 382 383 vfs_flagopt(mp->mnt_optnew, "norrip", &isomp->im_flags, ISOFSMNT_NORRIP); 384 vfs_flagopt(mp->mnt_optnew, "gens", &isomp->im_flags, ISOFSMNT_GENS); 385 vfs_flagopt(mp->mnt_optnew, "extatt", &isomp->im_flags, ISOFSMNT_EXTATT); 386 vfs_flagopt(mp->mnt_optnew, "nojoliet", &isomp->im_flags, ISOFSMNT_NOJOLIET); 387 vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV); 388 389 /* Check the Rock Ridge Extension support */ 390 if (!(isomp->im_flags & ISOFSMNT_NORRIP)) { 391 if ((error = bread(isomp->im_devvp, 392 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 393 (isomp->im_bshift - DEV_BSHIFT), 394 isomp->logical_block_size, NOCRED, &bp)) != 0) 395 goto out; 396 397 rootp = (struct iso_directory_record *)bp->b_data; 398 399 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 400 isomp->im_flags |= ISOFSMNT_NORRIP; 401 } else { 402 isomp->im_flags &= ~ISOFSMNT_GENS; 403 } 404 405 /* 406 * The contents are valid, 407 * but they will get reread as part of another vnode, so... 408 */ 409 bp->b_flags |= B_AGE; 410 brelse(bp); 411 bp = NULL; 412 } 413 414 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 415 cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error); 416 if (error) 417 goto out; 418 cs_disk = vfs_getopts(mp->mnt_optnew, "cs_disk", &error); 419 if (error) 420 goto out; 421 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l); 422 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d); 423 } else { 424 isomp->im_d2l = NULL; 425 isomp->im_l2d = NULL; 426 } 427 428 if (high_sierra) { 429 /* this effectively ignores all the mount flags */ 430 if (bootverbose) 431 log(LOG_INFO, "cd9660: High Sierra Format\n"); 432 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 433 } else 434 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 435 default: 436 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 437 break; 438 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 439 isomp->iso_ftype = ISO_FTYPE_9660; 440 break; 441 case 0: 442 if (bootverbose) 443 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 444 isomp->iso_ftype = ISO_FTYPE_RRIP; 445 break; 446 } 447 448 /* Decide whether to use the Joliet descriptor */ 449 450 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 451 if (bootverbose) 452 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", 453 joliet_level); 454 rootp = (struct iso_directory_record *) 455 sup->root_directory_record; 456 bcopy (rootp, isomp->root, sizeof isomp->root); 457 isomp->root_extent = isonum_733 (rootp->extent); 458 isomp->root_size = isonum_733 (rootp->size); 459 isomp->joliet_level = joliet_level; 460 supbp->b_flags |= B_AGE; 461 } 462 463 if (supbp) { 464 brelse(supbp); 465 supbp = NULL; 466 } 467 468 return 0; 469 out: 470 if (bp) 471 brelse(bp); 472 if (pribp) 473 brelse(pribp); 474 if (supbp) 475 brelse(supbp); 476 if (cp != NULL) { 477 DROP_GIANT(); 478 g_topology_lock(); 479 g_vfs_close(cp); 480 g_topology_unlock(); 481 PICKUP_GIANT(); 482 } 483 if (isomp) { 484 free((caddr_t)isomp, M_ISOFSMNT); 485 mp->mnt_data = NULL; 486 } 487 return error; 488 } 489 490 /* 491 * unmount system call 492 */ 493 static int 494 cd9660_unmount(mp, mntflags, td) 495 struct mount *mp; 496 int mntflags; 497 struct thread *td; 498 { 499 struct iso_mnt *isomp; 500 int error, flags = 0; 501 502 if (mntflags & MNT_FORCE) 503 flags |= FORCECLOSE; 504 if ((error = vflush(mp, 0, flags, td))) 505 return (error); 506 507 isomp = VFSTOISOFS(mp); 508 509 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 510 if (isomp->im_d2l) 511 cd9660_iconv->close(isomp->im_d2l); 512 if (isomp->im_l2d) 513 cd9660_iconv->close(isomp->im_l2d); 514 } 515 DROP_GIANT(); 516 g_topology_lock(); 517 g_vfs_close(isomp->im_cp); 518 g_topology_unlock(); 519 PICKUP_GIANT(); 520 vrele(isomp->im_devvp); 521 free((caddr_t)isomp, M_ISOFSMNT); 522 mp->mnt_data = NULL; 523 MNT_ILOCK(mp); 524 mp->mnt_flag &= ~MNT_LOCAL; 525 MNT_IUNLOCK(mp); 526 return (error); 527 } 528 529 /* 530 * Return root of a filesystem 531 */ 532 static int 533 cd9660_root(mp, flags, vpp, td) 534 struct mount *mp; 535 int flags; 536 struct vnode **vpp; 537 struct thread *td; 538 { 539 struct iso_mnt *imp = VFSTOISOFS(mp); 540 struct iso_directory_record *dp = 541 (struct iso_directory_record *)imp->root; 542 ino_t ino = isodirino(dp, imp); 543 544 /* 545 * With RRIP we must use the `.' entry of the root directory. 546 * Simply tell vget, that it's a relocated directory. 547 */ 548 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp, 549 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 550 } 551 552 /* 553 * Get filesystem statistics. 554 */ 555 static int 556 cd9660_statfs(mp, sbp, td) 557 struct mount *mp; 558 struct statfs *sbp; 559 struct thread *td; 560 { 561 struct iso_mnt *isomp; 562 563 isomp = VFSTOISOFS(mp); 564 565 sbp->f_bsize = isomp->logical_block_size; 566 sbp->f_iosize = sbp->f_bsize; /* XXX */ 567 sbp->f_blocks = isomp->volume_space_size; 568 sbp->f_bfree = 0; /* total free blocks */ 569 sbp->f_bavail = 0; /* blocks free for non superuser */ 570 sbp->f_files = 0; /* total files */ 571 sbp->f_ffree = 0; /* free file nodes */ 572 return 0; 573 } 574 575 /* 576 * File handle to vnode 577 * 578 * Have to be really careful about stale file handles: 579 * - check that the inode number is in range 580 * - call iget() to get the locked inode 581 * - check for an unallocated inode (i_mode == 0) 582 * - check that the generation number matches 583 */ 584 585 /* ARGSUSED */ 586 static int 587 cd9660_fhtovp(mp, fhp, vpp) 588 struct mount *mp; 589 struct fid *fhp; 590 struct vnode **vpp; 591 { 592 struct ifid *ifhp = (struct ifid *)fhp; 593 struct iso_node *ip; 594 struct vnode *nvp; 595 int error; 596 597 #ifdef ISOFS_DBG 598 printf("fhtovp: ino %d, start %ld\n", 599 ifhp->ifid_ino, ifhp->ifid_start); 600 #endif 601 602 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 603 *vpp = NULLVP; 604 return (error); 605 } 606 ip = VTOI(nvp); 607 if (ip->inode.iso_mode == 0) { 608 vput(nvp); 609 *vpp = NULLVP; 610 return (ESTALE); 611 } 612 *vpp = nvp; 613 vnode_create_vobject(*vpp, ip->i_size, curthread); 614 return (0); 615 } 616 617 static int 618 cd9660_vget(mp, ino, flags, vpp) 619 struct mount *mp; 620 ino_t ino; 621 int flags; 622 struct vnode **vpp; 623 { 624 625 /* 626 * XXXX 627 * It would be nice if we didn't always set the `relocated' flag 628 * and force the extra read, but I don't want to think about fixing 629 * that right now. 630 */ 631 return (cd9660_vget_internal(mp, ino, flags, vpp, 632 #if 0 633 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 634 #else 635 0, 636 #endif 637 (struct iso_directory_record *)0)); 638 } 639 640 int 641 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir) 642 struct mount *mp; 643 ino_t ino; 644 int flags; 645 struct vnode **vpp; 646 int relocated; 647 struct iso_directory_record *isodir; 648 { 649 struct iso_mnt *imp; 650 struct iso_node *ip; 651 struct buf *bp; 652 struct vnode *vp; 653 struct cdev *dev; 654 int error; 655 struct thread *td; 656 657 td = curthread; 658 error = vfs_hash_get(mp, ino, flags, td, vpp, NULL, NULL); 659 if (error || *vpp != NULL) 660 return (error); 661 662 imp = VFSTOISOFS(mp); 663 dev = imp->im_dev; 664 665 /* Allocate a new vnode/iso_node. */ 666 if ((error = getnewvnode("isofs", mp, &cd9660_vnodeops, &vp)) != 0) { 667 *vpp = NULLVP; 668 return (error); 669 } 670 ip = malloc(sizeof(struct iso_node), M_ISOFSNODE, 671 M_WAITOK | M_ZERO); 672 vp->v_data = ip; 673 ip->i_vnode = vp; 674 ip->i_number = ino; 675 676 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 677 error = insmntque(vp, mp); 678 if (error != 0) { 679 free(ip, M_ISOFSNODE); 680 *vpp = NULLVP; 681 return (error); 682 } 683 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL); 684 if (error || *vpp != NULL) 685 return (error); 686 687 if (isodir == 0) { 688 int lbn, off; 689 690 lbn = lblkno(imp, ino); 691 if (lbn >= imp->volume_space_size) { 692 vput(vp); 693 printf("fhtovp: lbn exceed volume space %d\n", lbn); 694 return (ESTALE); 695 } 696 697 off = blkoff(imp, ino); 698 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 699 vput(vp); 700 printf("fhtovp: crosses block boundary %d\n", 701 off + ISO_DIRECTORY_RECORD_SIZE); 702 return (ESTALE); 703 } 704 705 error = bread(imp->im_devvp, 706 lbn << (imp->im_bshift - DEV_BSHIFT), 707 imp->logical_block_size, NOCRED, &bp); 708 if (error) { 709 vput(vp); 710 brelse(bp); 711 printf("fhtovp: bread error %d\n",error); 712 return (error); 713 } 714 isodir = (struct iso_directory_record *)(bp->b_data + off); 715 716 if (off + isonum_711(isodir->length) > 717 imp->logical_block_size) { 718 vput(vp); 719 if (bp != 0) 720 brelse(bp); 721 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 722 off +isonum_711(isodir->length), off, 723 isonum_711(isodir->length)); 724 return (ESTALE); 725 } 726 727 #if 0 728 if (isonum_733(isodir->extent) + 729 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 730 if (bp != 0) 731 brelse(bp); 732 printf("fhtovp: file start miss %d vs %d\n", 733 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 734 ifhp->ifid_start); 735 return (ESTALE); 736 } 737 #endif 738 } else 739 bp = 0; 740 741 ip->i_mnt = imp; 742 VREF(imp->im_devvp); 743 744 if (relocated) { 745 /* 746 * On relocated directories we must 747 * read the `.' entry out of a dir. 748 */ 749 ip->iso_start = ino >> imp->im_bshift; 750 if (bp != 0) 751 brelse(bp); 752 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 753 vput(vp); 754 return (error); 755 } 756 isodir = (struct iso_directory_record *)bp->b_data; 757 } 758 759 ip->iso_extent = isonum_733(isodir->extent); 760 ip->i_size = isonum_733(isodir->size); 761 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 762 763 /* 764 * Setup time stamp, attribute 765 */ 766 vp->v_type = VNON; 767 switch (imp->iso_ftype) { 768 default: /* ISO_FTYPE_9660 */ 769 { 770 struct buf *bp2; 771 int off; 772 if ((imp->im_flags & ISOFSMNT_EXTATT) 773 && (off = isonum_711(isodir->ext_attr_length))) 774 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 775 &bp2); 776 else 777 bp2 = NULL; 778 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 779 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 780 if (bp2) 781 brelse(bp2); 782 break; 783 } 784 case ISO_FTYPE_RRIP: 785 cd9660_rrip_analyze(isodir, ip, imp); 786 break; 787 } 788 789 if (bp != 0) 790 brelse(bp); 791 792 /* 793 * Initialize the associated vnode 794 */ 795 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 796 case VFIFO: 797 vp->v_op = &cd9660_fifoops; 798 break; 799 default: 800 break; 801 } 802 803 if (ip->iso_extent == imp->root_extent) 804 vp->v_vflag |= VV_ROOT; 805 806 /* 807 * XXX need generation number? 808 */ 809 810 *vpp = vp; 811 return (0); 812 } 813