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