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/proc.h> 44 #include <sys/kernel.h> 45 #include <sys/vnode.h> 46 #include <sys/mount.h> 47 #include <sys/bio.h> 48 #include <sys/buf.h> 49 #include <sys/cdio.h> 50 #include <sys/conf.h> 51 #include <sys/fcntl.h> 52 #include <sys/malloc.h> 53 #include <sys/stat.h> 54 #include <sys/syslog.h> 55 #include <sys/iconv.h> 56 57 #include <isofs/cd9660/iso.h> 58 #include <isofs/cd9660/iso_rrip.h> 59 #include <isofs/cd9660/cd9660_node.h> 60 #include <isofs/cd9660/cd9660_mount.h> 61 62 #include <geom/geom.h> 63 #include <geom/geom_vfs.h> 64 65 MALLOC_DEFINE(M_ISOFSMNT, "isofs_mount", "ISOFS mount structure"); 66 MALLOC_DEFINE(M_ISOFSNODE, "isofs_node", "ISOFS vnode private part"); 67 68 struct iconv_functions *cd9660_iconv = NULL; 69 70 static vfs_mount_t cd9660_mount; 71 static vfs_cmount_t cd9660_cmount; 72 static vfs_unmount_t cd9660_unmount; 73 static vfs_root_t cd9660_root; 74 static vfs_statfs_t cd9660_statfs; 75 static vfs_vget_t cd9660_vget; 76 static vfs_fhtovp_t cd9660_fhtovp; 77 static vfs_vptofh_t cd9660_vptofh; 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 .vfs_vptofh = cd9660_vptofh, 88 }; 89 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 90 MODULE_VERSION(cd9660, 1); 91 92 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 93 struct thread *td); 94 95 /* 96 * VFS Operations. 97 */ 98 99 static int 100 cd9660_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 101 { 102 struct iso_args args; 103 int error; 104 105 error = copyin(data, &args, sizeof args); 106 if (error) 107 return (error); 108 109 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 110 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 111 ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64); 112 ma = mount_argsu(ma, "cs_local", args.cs_local, 64); 113 ma = mount_argf(ma, "ssector", "%u", args.ssector); 114 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip"); 115 ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens"); 116 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt"); 117 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet"); 118 ma = mount_argb(ma, 119 args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet"); 120 ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv"); 121 122 error = kernel_mount(ma, flags); 123 124 return (error); 125 } 126 127 static int 128 cd9660_mount(struct mount *mp, struct thread *td) 129 { 130 struct vnode *devvp; 131 struct export_args *export; 132 char *fspec; 133 int error, len; 134 mode_t accessmode; 135 struct nameidata ndp; 136 struct iso_mnt *imp = 0; 137 138 /* 139 * Unconditionally mount as read-only. 140 */ 141 mp->mnt_flag |= MNT_RDONLY; 142 143 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 144 if (error) 145 return (error); 146 147 imp = VFSTOISOFS(mp); 148 /* 149 * If updating, check whether changing from read-only to 150 * read/write; if there is no device name, that's all we do. 151 */ 152 if (mp->mnt_flag & MNT_UPDATE) { 153 error = vfs_getopt(mp->mnt_optnew, 154 "export", (void **)&export, &len); 155 if (error == 0 && len == sizeof *export && export->ex_flags) 156 return (vfs_export(mp, export)); 157 } 158 /* 159 * Not an update, or updating the name: look up the name 160 * and verify that it refers to a sensible block device. 161 */ 162 NDINIT(&ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 163 if ((error = namei(&ndp))) 164 return (error); 165 NDFREE(&ndp, NDF_ONLY_PNBUF); 166 devvp = ndp.ni_vp; 167 168 if (!vn_isdisk(devvp, &error)) { 169 vrele(devvp); 170 return (error); 171 } 172 173 /* 174 * Verify that user has necessary permissions on the device, 175 * or has superuser abilities 176 */ 177 accessmode = VREAD; 178 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 179 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td); 180 if (error) 181 error = suser(td); 182 if (error) { 183 vput(devvp); 184 return (error); 185 } 186 VOP_UNLOCK(devvp, 0, td); 187 188 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 189 error = iso_mountfs(devvp, mp, td); 190 } else { 191 if (devvp != imp->im_devvp) 192 error = EINVAL; /* needs translation */ 193 else 194 vrele(devvp); 195 } 196 if (error) { 197 vrele(devvp); 198 return error; 199 } 200 vfs_mountedfrom(mp, fspec); 201 return 0; 202 } 203 204 /* 205 * Common code for mount and mountroot 206 */ 207 static int 208 iso_mountfs(devvp, mp, td) 209 struct vnode *devvp; 210 struct mount *mp; 211 struct thread *td; 212 { 213 struct iso_mnt *isomp = (struct iso_mnt *)0; 214 struct buf *bp = NULL; 215 struct buf *pribp = NULL, *supbp = NULL; 216 struct cdev *dev = devvp->v_rdev; 217 int error = EINVAL; 218 int high_sierra = 0; 219 int iso_bsize; 220 int iso_blknum; 221 int joliet_level; 222 struct iso_volume_descriptor *vdp = 0; 223 struct iso_primary_descriptor *pri = NULL; 224 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 225 struct iso_supplementary_descriptor *sup = NULL; 226 struct iso_directory_record *rootp; 227 int logical_block_size, ssector; 228 struct g_consumer *cp; 229 struct bufobj *bo; 230 char *cs_local, *cs_disk; 231 232 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 233 DROP_GIANT(); 234 g_topology_lock(); 235 error = g_vfs_open(devvp, &cp, "cd9660", 0); 236 g_topology_unlock(); 237 PICKUP_GIANT(); 238 VOP_UNLOCK(devvp, 0, td); 239 if (error) 240 return error; 241 if (devvp->v_rdev->si_iosize_max != 0) 242 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 243 if (mp->mnt_iosize_max > MAXPHYS) 244 mp->mnt_iosize_max = MAXPHYS; 245 246 bo = &devvp->v_bufobj; 247 bo->bo_private = cp; 248 bo->bo_ops = g_vfs_bufops; 249 250 /* This is the "logical sector size". The standard says this 251 * should be 2048 or the physical sector size on the device, 252 * whichever is greater. 253 */ 254 if ((ISO_DEFAULT_BLOCK_SIZE % cp->provider->sectorsize) != 0) { 255 DROP_GIANT(); 256 g_topology_lock(); 257 g_vfs_close(cp, td); 258 g_topology_unlock(); 259 PICKUP_GIANT(); 260 return (EINVAL); 261 } 262 263 iso_bsize = cp->provider->sectorsize; 264 265 joliet_level = 0; 266 if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector)) 267 ssector = 0; 268 for (iso_blknum = 16 + ssector; 269 iso_blknum < 100 + ssector; 270 iso_blknum++) { 271 if ((error = bread(devvp, iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE), 272 iso_bsize, NOCRED, &bp)) != 0) 273 goto out; 274 275 vdp = (struct iso_volume_descriptor *)bp->b_data; 276 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 277 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 278 sizeof vdp->id) != 0) { 279 error = EINVAL; 280 goto out; 281 } else 282 high_sierra = 1; 283 } 284 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 285 case ISO_VD_PRIMARY: 286 if (pribp == NULL) { 287 pribp = bp; 288 bp = NULL; 289 pri = (struct iso_primary_descriptor *)vdp; 290 pri_sierra = 291 (struct iso_sierra_primary_descriptor *)vdp; 292 } 293 break; 294 295 case ISO_VD_SUPPLEMENTARY: 296 if (supbp == NULL) { 297 supbp = bp; 298 bp = NULL; 299 sup = (struct iso_supplementary_descriptor *)vdp; 300 301 if (!vfs_flagopt(mp->mnt_optnew, "nojoliet", NULL, 0)) { 302 if (bcmp(sup->escape, "%/@", 3) == 0) 303 joliet_level = 1; 304 if (bcmp(sup->escape, "%/C", 3) == 0) 305 joliet_level = 2; 306 if (bcmp(sup->escape, "%/E", 3) == 0) 307 joliet_level = 3; 308 309 if ((isonum_711 (sup->flags) & 1) && 310 !vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0)) 311 joliet_level = 0; 312 } 313 } 314 break; 315 316 case ISO_VD_END: 317 goto vd_end; 318 319 default: 320 break; 321 } 322 if (bp) { 323 brelse(bp); 324 bp = NULL; 325 } 326 } 327 vd_end: 328 if (bp) { 329 brelse(bp); 330 bp = NULL; 331 } 332 333 if (pri == NULL) { 334 error = EINVAL; 335 goto out; 336 } 337 338 logical_block_size = 339 isonum_723 (high_sierra? 340 pri_sierra->logical_block_size: 341 pri->logical_block_size); 342 343 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 344 || (logical_block_size & (logical_block_size - 1)) != 0) { 345 error = EINVAL; 346 goto out; 347 } 348 349 rootp = (struct iso_directory_record *) 350 (high_sierra? 351 pri_sierra->root_directory_record: 352 pri->root_directory_record); 353 354 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 355 isomp->im_cp = cp; 356 isomp->im_bo = bo; 357 isomp->logical_block_size = logical_block_size; 358 isomp->volume_space_size = 359 isonum_733 (high_sierra? 360 pri_sierra->volume_space_size: 361 pri->volume_space_size); 362 isomp->joliet_level = 0; 363 /* 364 * Since an ISO9660 multi-session CD can also access previous 365 * sessions, we have to include them into the space consider- 366 * ations. This doesn't yield a very accurate number since 367 * parts of the old sessions might be inaccessible now, but we 368 * can't do much better. This is also important for the NFS 369 * filehandle validation. 370 */ 371 isomp->volume_space_size += ssector; 372 bcopy (rootp, isomp->root, sizeof isomp->root); 373 isomp->root_extent = isonum_733 (rootp->extent); 374 isomp->root_size = isonum_733 (rootp->size); 375 376 isomp->im_bmask = logical_block_size - 1; 377 isomp->im_bshift = ffs(logical_block_size) - 1; 378 379 pribp->b_flags |= B_AGE; 380 brelse(pribp); 381 pribp = NULL; 382 383 mp->mnt_data = (qaddr_t)isomp; 384 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 385 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 386 mp->mnt_maxsymlinklen = 0; 387 mp->mnt_flag |= MNT_LOCAL; 388 isomp->im_mountp = mp; 389 isomp->im_dev = dev; 390 isomp->im_devvp = devvp; 391 392 vfs_flagopt(mp->mnt_optnew, "norrip", &isomp->im_flags, ISOFSMNT_NORRIP); 393 vfs_flagopt(mp->mnt_optnew, "gens", &isomp->im_flags, ISOFSMNT_GENS); 394 vfs_flagopt(mp->mnt_optnew, "extatt", &isomp->im_flags, ISOFSMNT_EXTATT); 395 vfs_flagopt(mp->mnt_optnew, "nojoliet", &isomp->im_flags, ISOFSMNT_NOJOLIET); 396 vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV); 397 398 /* Check the Rock Ridge Extension support */ 399 if (!(isomp->im_flags & ISOFSMNT_NORRIP)) { 400 if ((error = bread(isomp->im_devvp, 401 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 402 (isomp->im_bshift - DEV_BSHIFT), 403 isomp->logical_block_size, NOCRED, &bp)) != 0) 404 goto out; 405 406 rootp = (struct iso_directory_record *)bp->b_data; 407 408 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 409 isomp->im_flags |= ISOFSMNT_NORRIP; 410 } else { 411 isomp->im_flags &= ~ISOFSMNT_GENS; 412 } 413 414 /* 415 * The contents are valid, 416 * but they will get reread as part of another vnode, so... 417 */ 418 bp->b_flags |= B_AGE; 419 brelse(bp); 420 bp = NULL; 421 } 422 423 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 424 cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error); 425 if (error) 426 goto out; 427 cs_disk = vfs_getopts(mp->mnt_optnew, "cs_disk", &error); 428 if (error) 429 goto out; 430 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l); 431 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d); 432 } else { 433 isomp->im_d2l = NULL; 434 isomp->im_l2d = NULL; 435 } 436 437 if (high_sierra) { 438 /* this effectively ignores all the mount flags */ 439 if (bootverbose) 440 log(LOG_INFO, "cd9660: High Sierra Format\n"); 441 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 442 } else 443 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 444 default: 445 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 446 break; 447 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 448 isomp->iso_ftype = ISO_FTYPE_9660; 449 break; 450 case 0: 451 if (bootverbose) 452 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 453 isomp->iso_ftype = ISO_FTYPE_RRIP; 454 break; 455 } 456 457 /* Decide whether to use the Joliet descriptor */ 458 459 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 460 if (bootverbose) 461 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", 462 joliet_level); 463 rootp = (struct iso_directory_record *) 464 sup->root_directory_record; 465 bcopy (rootp, isomp->root, sizeof isomp->root); 466 isomp->root_extent = isonum_733 (rootp->extent); 467 isomp->root_size = isonum_733 (rootp->size); 468 isomp->joliet_level = joliet_level; 469 supbp->b_flags |= B_AGE; 470 } 471 472 if (supbp) { 473 brelse(supbp); 474 supbp = NULL; 475 } 476 477 return 0; 478 out: 479 if (bp) 480 brelse(bp); 481 if (pribp) 482 brelse(pribp); 483 if (supbp) 484 brelse(supbp); 485 if (cp != NULL) { 486 DROP_GIANT(); 487 g_topology_lock(); 488 g_vfs_close(cp, td); 489 g_topology_unlock(); 490 PICKUP_GIANT(); 491 } 492 if (isomp) { 493 free((caddr_t)isomp, M_ISOFSMNT); 494 mp->mnt_data = (qaddr_t)0; 495 } 496 return error; 497 } 498 499 /* 500 * unmount system call 501 */ 502 static int 503 cd9660_unmount(mp, mntflags, td) 504 struct mount *mp; 505 int mntflags; 506 struct thread *td; 507 { 508 struct iso_mnt *isomp; 509 int error, flags = 0; 510 511 if (mntflags & MNT_FORCE) 512 flags |= FORCECLOSE; 513 #if 0 514 mntflushbuf(mp, 0); 515 if (mntinvalbuf(mp)) 516 return EBUSY; 517 #endif 518 if ((error = vflush(mp, 0, flags, td))) 519 return (error); 520 521 isomp = VFSTOISOFS(mp); 522 523 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 524 if (isomp->im_d2l) 525 cd9660_iconv->close(isomp->im_d2l); 526 if (isomp->im_l2d) 527 cd9660_iconv->close(isomp->im_l2d); 528 } 529 DROP_GIANT(); 530 g_topology_lock(); 531 g_vfs_close(isomp->im_cp, td); 532 g_topology_unlock(); 533 PICKUP_GIANT(); 534 vrele(isomp->im_devvp); 535 free((caddr_t)isomp, M_ISOFSMNT); 536 mp->mnt_data = (qaddr_t)0; 537 mp->mnt_flag &= ~MNT_LOCAL; 538 return (error); 539 } 540 541 /* 542 * Return root of a filesystem 543 */ 544 static int 545 cd9660_root(mp, flags, vpp, td) 546 struct mount *mp; 547 int flags; 548 struct vnode **vpp; 549 struct thread *td; 550 { 551 struct iso_mnt *imp = VFSTOISOFS(mp); 552 struct iso_directory_record *dp = 553 (struct iso_directory_record *)imp->root; 554 ino_t ino = isodirino(dp, imp); 555 556 /* 557 * With RRIP we must use the `.' entry of the root directory. 558 * Simply tell vget, that it's a relocated directory. 559 */ 560 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp, 561 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 562 } 563 564 /* 565 * Get filesystem statistics. 566 */ 567 static int 568 cd9660_statfs(mp, sbp, td) 569 struct mount *mp; 570 struct statfs *sbp; 571 struct thread *td; 572 { 573 struct iso_mnt *isomp; 574 575 isomp = VFSTOISOFS(mp); 576 577 sbp->f_bsize = isomp->logical_block_size; 578 sbp->f_iosize = sbp->f_bsize; /* XXX */ 579 sbp->f_blocks = isomp->volume_space_size; 580 sbp->f_bfree = 0; /* total free blocks */ 581 sbp->f_bavail = 0; /* blocks free for non superuser */ 582 sbp->f_files = 0; /* total files */ 583 sbp->f_ffree = 0; /* free file nodes */ 584 return 0; 585 } 586 587 /* 588 * File handle to vnode 589 * 590 * Have to be really careful about stale file handles: 591 * - check that the inode number is in range 592 * - call iget() to get the locked inode 593 * - check for an unallocated inode (i_mode == 0) 594 * - check that the generation number matches 595 */ 596 597 struct ifid { 598 u_short ifid_len; 599 u_short ifid_pad; 600 int ifid_ino; 601 long ifid_start; 602 }; 603 604 /* ARGSUSED */ 605 static int 606 cd9660_fhtovp(mp, fhp, vpp) 607 struct mount *mp; 608 struct fid *fhp; 609 struct vnode **vpp; 610 { 611 struct ifid *ifhp = (struct ifid *)fhp; 612 struct iso_node *ip; 613 struct vnode *nvp; 614 int error; 615 616 #ifdef ISOFS_DBG 617 printf("fhtovp: ino %d, start %ld\n", 618 ifhp->ifid_ino, ifhp->ifid_start); 619 #endif 620 621 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 622 *vpp = NULLVP; 623 return (error); 624 } 625 ip = VTOI(nvp); 626 if (ip->inode.iso_mode == 0) { 627 vput(nvp); 628 *vpp = NULLVP; 629 return (ESTALE); 630 } 631 *vpp = nvp; 632 vnode_create_vobject(*vpp, ip->i_size, curthread); 633 return (0); 634 } 635 636 static int 637 cd9660_vget(mp, ino, flags, vpp) 638 struct mount *mp; 639 ino_t ino; 640 int flags; 641 struct vnode **vpp; 642 { 643 644 /* 645 * XXXX 646 * It would be nice if we didn't always set the `relocated' flag 647 * and force the extra read, but I don't want to think about fixing 648 * that right now. 649 */ 650 return (cd9660_vget_internal(mp, ino, flags, vpp, 651 #if 0 652 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 653 #else 654 0, 655 #endif 656 (struct iso_directory_record *)0)); 657 } 658 659 int 660 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir) 661 struct mount *mp; 662 ino_t ino; 663 int flags; 664 struct vnode **vpp; 665 int relocated; 666 struct iso_directory_record *isodir; 667 { 668 struct iso_mnt *imp; 669 struct iso_node *ip; 670 struct buf *bp; 671 struct vnode *vp; 672 struct cdev *dev; 673 int error; 674 675 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); 676 if (error || *vpp != NULL) 677 return (error); 678 679 imp = VFSTOISOFS(mp); 680 dev = imp->im_dev; 681 682 /* Allocate a new vnode/iso_node. */ 683 if ((error = getnewvnode("isofs", mp, &cd9660_vnodeops, &vp)) != 0) { 684 *vpp = NULLVP; 685 return (error); 686 } 687 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 688 M_WAITOK | M_ZERO); 689 vp->v_data = ip; 690 ip->i_vnode = vp; 691 ip->i_number = ino; 692 693 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); 694 if (error || *vpp != NULL) 695 return (error); 696 697 if (isodir == 0) { 698 int lbn, off; 699 700 lbn = lblkno(imp, ino); 701 if (lbn >= imp->volume_space_size) { 702 vput(vp); 703 printf("fhtovp: lbn exceed volume space %d\n", lbn); 704 return (ESTALE); 705 } 706 707 off = blkoff(imp, ino); 708 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 709 vput(vp); 710 printf("fhtovp: crosses block boundary %d\n", 711 off + ISO_DIRECTORY_RECORD_SIZE); 712 return (ESTALE); 713 } 714 715 error = bread(imp->im_devvp, 716 lbn << (imp->im_bshift - DEV_BSHIFT), 717 imp->logical_block_size, NOCRED, &bp); 718 if (error) { 719 vput(vp); 720 brelse(bp); 721 printf("fhtovp: bread error %d\n",error); 722 return (error); 723 } 724 isodir = (struct iso_directory_record *)(bp->b_data + off); 725 726 if (off + isonum_711(isodir->length) > 727 imp->logical_block_size) { 728 vput(vp); 729 if (bp != 0) 730 brelse(bp); 731 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 732 off +isonum_711(isodir->length), off, 733 isonum_711(isodir->length)); 734 return (ESTALE); 735 } 736 737 #if 0 738 if (isonum_733(isodir->extent) + 739 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 740 if (bp != 0) 741 brelse(bp); 742 printf("fhtovp: file start miss %d vs %d\n", 743 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 744 ifhp->ifid_start); 745 return (ESTALE); 746 } 747 #endif 748 } else 749 bp = 0; 750 751 ip->i_mnt = imp; 752 VREF(imp->im_devvp); 753 754 if (relocated) { 755 /* 756 * On relocated directories we must 757 * read the `.' entry out of a dir. 758 */ 759 ip->iso_start = ino >> imp->im_bshift; 760 if (bp != 0) 761 brelse(bp); 762 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 763 vput(vp); 764 return (error); 765 } 766 isodir = (struct iso_directory_record *)bp->b_data; 767 } 768 769 ip->iso_extent = isonum_733(isodir->extent); 770 ip->i_size = isonum_733(isodir->size); 771 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 772 773 /* 774 * Setup time stamp, attribute 775 */ 776 vp->v_type = VNON; 777 switch (imp->iso_ftype) { 778 default: /* ISO_FTYPE_9660 */ 779 { 780 struct buf *bp2; 781 int off; 782 if ((imp->im_flags & ISOFSMNT_EXTATT) 783 && (off = isonum_711(isodir->ext_attr_length))) 784 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 785 &bp2); 786 else 787 bp2 = NULL; 788 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 789 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 790 if (bp2) 791 brelse(bp2); 792 break; 793 } 794 case ISO_FTYPE_RRIP: 795 cd9660_rrip_analyze(isodir, ip, imp); 796 break; 797 } 798 799 if (bp != 0) 800 brelse(bp); 801 802 /* 803 * Initialize the associated vnode 804 */ 805 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 806 case VFIFO: 807 vp->v_op = &cd9660_fifoops; 808 break; 809 default: 810 break; 811 } 812 813 if (ip->iso_extent == imp->root_extent) 814 vp->v_vflag |= VV_ROOT; 815 816 /* 817 * XXX need generation number? 818 */ 819 820 *vpp = vp; 821 return (0); 822 } 823 824 /* 825 * Vnode pointer to File handle 826 */ 827 /* ARGSUSED */ 828 static int 829 cd9660_vptofh(vp, fhp) 830 struct vnode *vp; 831 struct fid *fhp; 832 { 833 struct iso_node *ip = VTOI(vp); 834 struct ifid *ifhp; 835 836 ifhp = (struct ifid *)fhp; 837 ifhp->ifid_len = sizeof(struct ifid); 838 839 ifhp->ifid_ino = ip->i_number; 840 ifhp->ifid_start = ip->iso_start; 841 842 #ifdef ISOFS_DBG 843 printf("vptofh: ino %d, start %ld\n", 844 ifhp->ifid_ino,ifhp->ifid_start); 845 #endif 846 return 0; 847 } 848