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 <isofs/cd9660/iso.h> 59 #include <isofs/cd9660/iso_rrip.h> 60 #include <isofs/cd9660/cd9660_node.h> 61 #include <isofs/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 static vfs_vptofh_t cd9660_vptofh; 79 80 static struct vfsops cd9660_vfsops = { 81 .vfs_fhtovp = cd9660_fhtovp, 82 .vfs_mount = cd9660_mount, 83 .vfs_cmount = cd9660_cmount, 84 .vfs_root = cd9660_root, 85 .vfs_statfs = cd9660_statfs, 86 .vfs_unmount = cd9660_unmount, 87 .vfs_vget = cd9660_vget, 88 .vfs_vptofh = cd9660_vptofh, 89 }; 90 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 91 MODULE_VERSION(cd9660, 1); 92 93 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 94 struct thread *td); 95 96 /* 97 * VFS Operations. 98 */ 99 100 static int 101 cd9660_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 102 { 103 struct iso_args args; 104 int error; 105 106 error = copyin(data, &args, sizeof args); 107 if (error) 108 return (error); 109 110 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 111 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 112 ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64); 113 ma = mount_argsu(ma, "cs_local", args.cs_local, 64); 114 ma = mount_argf(ma, "ssector", "%u", args.ssector); 115 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip"); 116 ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens"); 117 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt"); 118 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet"); 119 ma = mount_argb(ma, 120 args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet"); 121 ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv"); 122 123 error = kernel_mount(ma, flags); 124 125 return (error); 126 } 127 128 static int 129 cd9660_mount(struct mount *mp, struct thread *td) 130 { 131 struct vnode *devvp; 132 char *fspec; 133 int error; 134 mode_t accessmode; 135 struct nameidata ndp; 136 struct iso_mnt *imp = 0; 137 138 /* 139 * Unconditionally mount as read-only. 140 */ 141 MNT_ILOCK(mp); 142 mp->mnt_flag |= MNT_RDONLY; 143 MNT_IUNLOCK(mp); 144 145 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 146 if (error) 147 return (error); 148 149 imp = VFSTOISOFS(mp); 150 151 if (mp->mnt_flag & MNT_UPDATE) { 152 if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0)) 153 return (0); 154 } 155 /* 156 * Not an update, or updating the name: look up the name 157 * and verify that it refers to a sensible block device. 158 */ 159 NDINIT(&ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 160 if ((error = namei(&ndp))) 161 return (error); 162 NDFREE(&ndp, NDF_ONLY_PNBUF); 163 devvp = ndp.ni_vp; 164 165 if (!vn_isdisk(devvp, &error)) { 166 vrele(devvp); 167 return (error); 168 } 169 170 /* 171 * Verify that user has necessary permissions on the device, 172 * or has superuser abilities 173 */ 174 accessmode = VREAD; 175 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 176 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td); 177 if (error) 178 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 179 if (error) { 180 vput(devvp); 181 return (error); 182 } 183 VOP_UNLOCK(devvp, 0, td); 184 185 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 186 error = iso_mountfs(devvp, mp, td); 187 } else { 188 if (devvp != imp->im_devvp) 189 error = EINVAL; /* needs translation */ 190 else 191 vrele(devvp); 192 } 193 if (error) { 194 vrele(devvp); 195 return error; 196 } 197 vfs_mountedfrom(mp, fspec); 198 return 0; 199 } 200 201 /* 202 * Common code for mount and mountroot 203 */ 204 static int 205 iso_mountfs(devvp, mp, td) 206 struct vnode *devvp; 207 struct mount *mp; 208 struct thread *td; 209 { 210 struct iso_mnt *isomp = (struct iso_mnt *)0; 211 struct buf *bp = NULL; 212 struct buf *pribp = NULL, *supbp = NULL; 213 struct cdev *dev = devvp->v_rdev; 214 int error = EINVAL; 215 int high_sierra = 0; 216 int iso_bsize; 217 int iso_blknum; 218 int joliet_level; 219 struct iso_volume_descriptor *vdp = 0; 220 struct iso_primary_descriptor *pri = NULL; 221 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 222 struct iso_supplementary_descriptor *sup = NULL; 223 struct iso_directory_record *rootp; 224 int logical_block_size, ssector; 225 struct g_consumer *cp; 226 struct bufobj *bo; 227 char *cs_local, *cs_disk; 228 229 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 230 DROP_GIANT(); 231 g_topology_lock(); 232 error = g_vfs_open(devvp, &cp, "cd9660", 0); 233 g_topology_unlock(); 234 PICKUP_GIANT(); 235 VOP_UNLOCK(devvp, 0, td); 236 if (error) 237 return error; 238 if (devvp->v_rdev->si_iosize_max != 0) 239 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 240 if (mp->mnt_iosize_max > MAXPHYS) 241 mp->mnt_iosize_max = MAXPHYS; 242 243 bo = &devvp->v_bufobj; 244 bo->bo_private = cp; 245 bo->bo_ops = g_vfs_bufops; 246 247 /* This is the "logical sector size". The standard says this 248 * should be 2048 or the physical sector size on the device, 249 * whichever is greater. 250 */ 251 if ((ISO_DEFAULT_BLOCK_SIZE % cp->provider->sectorsize) != 0) { 252 DROP_GIANT(); 253 g_topology_lock(); 254 g_vfs_close(cp, td); 255 g_topology_unlock(); 256 PICKUP_GIANT(); 257 return (EINVAL); 258 } 259 260 iso_bsize = cp->provider->sectorsize; 261 262 joliet_level = 0; 263 if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector)) 264 ssector = 0; 265 for (iso_blknum = 16 + ssector; 266 iso_blknum < 100 + ssector; 267 iso_blknum++) { 268 if ((error = bread(devvp, iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE), 269 iso_bsize, NOCRED, &bp)) != 0) 270 goto out; 271 272 vdp = (struct iso_volume_descriptor *)bp->b_data; 273 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 274 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 275 sizeof vdp->id) != 0) { 276 error = EINVAL; 277 goto out; 278 } else 279 high_sierra = 1; 280 } 281 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 282 case ISO_VD_PRIMARY: 283 if (pribp == NULL) { 284 pribp = bp; 285 bp = NULL; 286 pri = (struct iso_primary_descriptor *)vdp; 287 pri_sierra = 288 (struct iso_sierra_primary_descriptor *)vdp; 289 } 290 break; 291 292 case ISO_VD_SUPPLEMENTARY: 293 if (supbp == NULL) { 294 supbp = bp; 295 bp = NULL; 296 sup = (struct iso_supplementary_descriptor *)vdp; 297 298 if (!vfs_flagopt(mp->mnt_optnew, "nojoliet", NULL, 0)) { 299 if (bcmp(sup->escape, "%/@", 3) == 0) 300 joliet_level = 1; 301 if (bcmp(sup->escape, "%/C", 3) == 0) 302 joliet_level = 2; 303 if (bcmp(sup->escape, "%/E", 3) == 0) 304 joliet_level = 3; 305 306 if ((isonum_711 (sup->flags) & 1) && 307 !vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0)) 308 joliet_level = 0; 309 } 310 } 311 break; 312 313 case ISO_VD_END: 314 goto vd_end; 315 316 default: 317 break; 318 } 319 if (bp) { 320 brelse(bp); 321 bp = NULL; 322 } 323 } 324 vd_end: 325 if (bp) { 326 brelse(bp); 327 bp = NULL; 328 } 329 330 if (pri == NULL) { 331 error = EINVAL; 332 goto out; 333 } 334 335 logical_block_size = 336 isonum_723 (high_sierra? 337 pri_sierra->logical_block_size: 338 pri->logical_block_size); 339 340 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 341 || (logical_block_size & (logical_block_size - 1)) != 0) { 342 error = EINVAL; 343 goto out; 344 } 345 346 rootp = (struct iso_directory_record *) 347 (high_sierra? 348 pri_sierra->root_directory_record: 349 pri->root_directory_record); 350 351 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 352 isomp->im_cp = cp; 353 isomp->im_bo = bo; 354 isomp->logical_block_size = logical_block_size; 355 isomp->volume_space_size = 356 isonum_733 (high_sierra? 357 pri_sierra->volume_space_size: 358 pri->volume_space_size); 359 isomp->joliet_level = 0; 360 /* 361 * Since an ISO9660 multi-session CD can also access previous 362 * sessions, we have to include them into the space consider- 363 * ations. This doesn't yield a very accurate number since 364 * parts of the old sessions might be inaccessible now, but we 365 * can't do much better. This is also important for the NFS 366 * filehandle validation. 367 */ 368 isomp->volume_space_size += ssector; 369 bcopy (rootp, isomp->root, sizeof isomp->root); 370 isomp->root_extent = isonum_733 (rootp->extent); 371 isomp->root_size = isonum_733 (rootp->size); 372 373 isomp->im_bmask = logical_block_size - 1; 374 isomp->im_bshift = ffs(logical_block_size) - 1; 375 376 pribp->b_flags |= B_AGE; 377 brelse(pribp); 378 pribp = NULL; 379 380 mp->mnt_data = (qaddr_t)isomp; 381 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 382 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 383 mp->mnt_maxsymlinklen = 0; 384 MNT_ILOCK(mp); 385 mp->mnt_flag |= MNT_LOCAL; 386 MNT_IUNLOCK(mp); 387 isomp->im_mountp = mp; 388 isomp->im_dev = dev; 389 isomp->im_devvp = devvp; 390 391 vfs_flagopt(mp->mnt_optnew, "norrip", &isomp->im_flags, ISOFSMNT_NORRIP); 392 vfs_flagopt(mp->mnt_optnew, "gens", &isomp->im_flags, ISOFSMNT_GENS); 393 vfs_flagopt(mp->mnt_optnew, "extatt", &isomp->im_flags, ISOFSMNT_EXTATT); 394 vfs_flagopt(mp->mnt_optnew, "nojoliet", &isomp->im_flags, ISOFSMNT_NOJOLIET); 395 vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV); 396 397 /* Check the Rock Ridge Extension support */ 398 if (!(isomp->im_flags & ISOFSMNT_NORRIP)) { 399 if ((error = bread(isomp->im_devvp, 400 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 401 (isomp->im_bshift - DEV_BSHIFT), 402 isomp->logical_block_size, NOCRED, &bp)) != 0) 403 goto out; 404 405 rootp = (struct iso_directory_record *)bp->b_data; 406 407 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 408 isomp->im_flags |= ISOFSMNT_NORRIP; 409 } else { 410 isomp->im_flags &= ~ISOFSMNT_GENS; 411 } 412 413 /* 414 * The contents are valid, 415 * but they will get reread as part of another vnode, so... 416 */ 417 bp->b_flags |= B_AGE; 418 brelse(bp); 419 bp = NULL; 420 } 421 422 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 423 cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error); 424 if (error) 425 goto out; 426 cs_disk = vfs_getopts(mp->mnt_optnew, "cs_disk", &error); 427 if (error) 428 goto out; 429 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l); 430 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d); 431 } else { 432 isomp->im_d2l = NULL; 433 isomp->im_l2d = NULL; 434 } 435 436 if (high_sierra) { 437 /* this effectively ignores all the mount flags */ 438 if (bootverbose) 439 log(LOG_INFO, "cd9660: High Sierra Format\n"); 440 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 441 } else 442 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 443 default: 444 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 445 break; 446 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 447 isomp->iso_ftype = ISO_FTYPE_9660; 448 break; 449 case 0: 450 if (bootverbose) 451 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 452 isomp->iso_ftype = ISO_FTYPE_RRIP; 453 break; 454 } 455 456 /* Decide whether to use the Joliet descriptor */ 457 458 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 459 if (bootverbose) 460 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", 461 joliet_level); 462 rootp = (struct iso_directory_record *) 463 sup->root_directory_record; 464 bcopy (rootp, isomp->root, sizeof isomp->root); 465 isomp->root_extent = isonum_733 (rootp->extent); 466 isomp->root_size = isonum_733 (rootp->size); 467 isomp->joliet_level = joliet_level; 468 supbp->b_flags |= B_AGE; 469 } 470 471 if (supbp) { 472 brelse(supbp); 473 supbp = NULL; 474 } 475 476 return 0; 477 out: 478 if (bp) 479 brelse(bp); 480 if (pribp) 481 brelse(pribp); 482 if (supbp) 483 brelse(supbp); 484 if (cp != NULL) { 485 DROP_GIANT(); 486 g_topology_lock(); 487 g_vfs_close(cp, td); 488 g_topology_unlock(); 489 PICKUP_GIANT(); 490 } 491 if (isomp) { 492 free((caddr_t)isomp, M_ISOFSMNT); 493 mp->mnt_data = (qaddr_t)0; 494 } 495 return error; 496 } 497 498 /* 499 * unmount system call 500 */ 501 static int 502 cd9660_unmount(mp, mntflags, td) 503 struct mount *mp; 504 int mntflags; 505 struct thread *td; 506 { 507 struct iso_mnt *isomp; 508 int error, flags = 0; 509 510 if (mntflags & MNT_FORCE) 511 flags |= FORCECLOSE; 512 #if 0 513 mntflushbuf(mp, 0); 514 if (mntinvalbuf(mp)) 515 return EBUSY; 516 #endif 517 if ((error = vflush(mp, 0, flags, td))) 518 return (error); 519 520 isomp = VFSTOISOFS(mp); 521 522 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 523 if (isomp->im_d2l) 524 cd9660_iconv->close(isomp->im_d2l); 525 if (isomp->im_l2d) 526 cd9660_iconv->close(isomp->im_l2d); 527 } 528 DROP_GIANT(); 529 g_topology_lock(); 530 g_vfs_close(isomp->im_cp, td); 531 g_topology_unlock(); 532 PICKUP_GIANT(); 533 vrele(isomp->im_devvp); 534 free((caddr_t)isomp, M_ISOFSMNT); 535 mp->mnt_data = (qaddr_t)0; 536 MNT_ILOCK(mp); 537 mp->mnt_flag &= ~MNT_LOCAL; 538 MNT_IUNLOCK(mp); 539 return (error); 540 } 541 542 /* 543 * Return root of a filesystem 544 */ 545 static int 546 cd9660_root(mp, flags, vpp, td) 547 struct mount *mp; 548 int flags; 549 struct vnode **vpp; 550 struct thread *td; 551 { 552 struct iso_mnt *imp = VFSTOISOFS(mp); 553 struct iso_directory_record *dp = 554 (struct iso_directory_record *)imp->root; 555 ino_t ino = isodirino(dp, imp); 556 557 /* 558 * With RRIP we must use the `.' entry of the root directory. 559 * Simply tell vget, that it's a relocated directory. 560 */ 561 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp, 562 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 563 } 564 565 /* 566 * Get filesystem statistics. 567 */ 568 static int 569 cd9660_statfs(mp, sbp, td) 570 struct mount *mp; 571 struct statfs *sbp; 572 struct thread *td; 573 { 574 struct iso_mnt *isomp; 575 576 isomp = VFSTOISOFS(mp); 577 578 sbp->f_bsize = isomp->logical_block_size; 579 sbp->f_iosize = sbp->f_bsize; /* XXX */ 580 sbp->f_blocks = isomp->volume_space_size; 581 sbp->f_bfree = 0; /* total free blocks */ 582 sbp->f_bavail = 0; /* blocks free for non superuser */ 583 sbp->f_files = 0; /* total files */ 584 sbp->f_ffree = 0; /* free file nodes */ 585 return 0; 586 } 587 588 /* 589 * File handle to vnode 590 * 591 * Have to be really careful about stale file handles: 592 * - check that the inode number is in range 593 * - call iget() to get the locked inode 594 * - check for an unallocated inode (i_mode == 0) 595 * - check that the generation number matches 596 */ 597 598 struct ifid { 599 u_short ifid_len; 600 u_short ifid_pad; 601 int ifid_ino; 602 long ifid_start; 603 }; 604 605 /* ARGSUSED */ 606 static int 607 cd9660_fhtovp(mp, fhp, vpp) 608 struct mount *mp; 609 struct fid *fhp; 610 struct vnode **vpp; 611 { 612 struct ifid *ifhp = (struct ifid *)fhp; 613 struct iso_node *ip; 614 struct vnode *nvp; 615 int error; 616 617 #ifdef ISOFS_DBG 618 printf("fhtovp: ino %d, start %ld\n", 619 ifhp->ifid_ino, ifhp->ifid_start); 620 #endif 621 622 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 623 *vpp = NULLVP; 624 return (error); 625 } 626 ip = VTOI(nvp); 627 if (ip->inode.iso_mode == 0) { 628 vput(nvp); 629 *vpp = NULLVP; 630 return (ESTALE); 631 } 632 *vpp = nvp; 633 vnode_create_vobject(*vpp, ip->i_size, curthread); 634 return (0); 635 } 636 637 static int 638 cd9660_vget(mp, ino, flags, vpp) 639 struct mount *mp; 640 ino_t ino; 641 int flags; 642 struct vnode **vpp; 643 { 644 645 /* 646 * XXXX 647 * It would be nice if we didn't always set the `relocated' flag 648 * and force the extra read, but I don't want to think about fixing 649 * that right now. 650 */ 651 return (cd9660_vget_internal(mp, ino, flags, vpp, 652 #if 0 653 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 654 #else 655 0, 656 #endif 657 (struct iso_directory_record *)0)); 658 } 659 660 int 661 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir) 662 struct mount *mp; 663 ino_t ino; 664 int flags; 665 struct vnode **vpp; 666 int relocated; 667 struct iso_directory_record *isodir; 668 { 669 struct iso_mnt *imp; 670 struct iso_node *ip; 671 struct buf *bp; 672 struct vnode *vp; 673 struct cdev *dev; 674 int error; 675 676 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 677 if (error || *vpp != NULL) 678 return (error); 679 680 imp = VFSTOISOFS(mp); 681 dev = imp->im_dev; 682 683 /* Allocate a new vnode/iso_node. */ 684 if ((error = getnewvnode("isofs", mp, &cd9660_vnodeops, &vp)) != 0) { 685 *vpp = NULLVP; 686 return (error); 687 } 688 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 689 M_WAITOK | M_ZERO); 690 vp->v_data = ip; 691 ip->i_vnode = vp; 692 ip->i_number = ino; 693 694 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 695 if (error || *vpp != NULL) 696 return (error); 697 698 if (isodir == 0) { 699 int lbn, off; 700 701 lbn = lblkno(imp, ino); 702 if (lbn >= imp->volume_space_size) { 703 vput(vp); 704 printf("fhtovp: lbn exceed volume space %d\n", lbn); 705 return (ESTALE); 706 } 707 708 off = blkoff(imp, ino); 709 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 710 vput(vp); 711 printf("fhtovp: crosses block boundary %d\n", 712 off + ISO_DIRECTORY_RECORD_SIZE); 713 return (ESTALE); 714 } 715 716 error = bread(imp->im_devvp, 717 lbn << (imp->im_bshift - DEV_BSHIFT), 718 imp->logical_block_size, NOCRED, &bp); 719 if (error) { 720 vput(vp); 721 brelse(bp); 722 printf("fhtovp: bread error %d\n",error); 723 return (error); 724 } 725 isodir = (struct iso_directory_record *)(bp->b_data + off); 726 727 if (off + isonum_711(isodir->length) > 728 imp->logical_block_size) { 729 vput(vp); 730 if (bp != 0) 731 brelse(bp); 732 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 733 off +isonum_711(isodir->length), off, 734 isonum_711(isodir->length)); 735 return (ESTALE); 736 } 737 738 #if 0 739 if (isonum_733(isodir->extent) + 740 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 741 if (bp != 0) 742 brelse(bp); 743 printf("fhtovp: file start miss %d vs %d\n", 744 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 745 ifhp->ifid_start); 746 return (ESTALE); 747 } 748 #endif 749 } else 750 bp = 0; 751 752 ip->i_mnt = imp; 753 VREF(imp->im_devvp); 754 755 if (relocated) { 756 /* 757 * On relocated directories we must 758 * read the `.' entry out of a dir. 759 */ 760 ip->iso_start = ino >> imp->im_bshift; 761 if (bp != 0) 762 brelse(bp); 763 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 764 vput(vp); 765 return (error); 766 } 767 isodir = (struct iso_directory_record *)bp->b_data; 768 } 769 770 ip->iso_extent = isonum_733(isodir->extent); 771 ip->i_size = isonum_733(isodir->size); 772 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 773 774 /* 775 * Setup time stamp, attribute 776 */ 777 vp->v_type = VNON; 778 switch (imp->iso_ftype) { 779 default: /* ISO_FTYPE_9660 */ 780 { 781 struct buf *bp2; 782 int off; 783 if ((imp->im_flags & ISOFSMNT_EXTATT) 784 && (off = isonum_711(isodir->ext_attr_length))) 785 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 786 &bp2); 787 else 788 bp2 = NULL; 789 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 790 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 791 if (bp2) 792 brelse(bp2); 793 break; 794 } 795 case ISO_FTYPE_RRIP: 796 cd9660_rrip_analyze(isodir, ip, imp); 797 break; 798 } 799 800 if (bp != 0) 801 brelse(bp); 802 803 /* 804 * Initialize the associated vnode 805 */ 806 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 807 case VFIFO: 808 vp->v_op = &cd9660_fifoops; 809 break; 810 default: 811 break; 812 } 813 814 if (ip->iso_extent == imp->root_extent) 815 vp->v_vflag |= VV_ROOT; 816 817 /* 818 * XXX need generation number? 819 */ 820 821 *vpp = vp; 822 return (0); 823 } 824 825 /* 826 * Vnode pointer to File handle 827 */ 828 /* ARGSUSED */ 829 static int 830 cd9660_vptofh(vp, fhp) 831 struct vnode *vp; 832 struct fid *fhp; 833 { 834 struct iso_node *ip = VTOI(vp); 835 struct ifid *ifhp; 836 837 ifhp = (struct ifid *)fhp; 838 ifhp->ifid_len = sizeof(struct ifid); 839 840 ifhp->ifid_ino = ip->i_number; 841 ifhp->ifid_start = ip->iso_start; 842 843 #ifdef ISOFS_DBG 844 printf("vptofh: ino %d, start %ld\n", 845 ifhp->ifid_ino,ifhp->ifid_start); 846 #endif 847 return 0; 848 } 849