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_init = cd9660_init, 82 .vfs_mount = cd9660_mount, 83 .vfs_cmount = cd9660_cmount, 84 .vfs_root = cd9660_root, 85 .vfs_statfs = cd9660_statfs, 86 .vfs_uninit = cd9660_uninit, 87 .vfs_unmount = cd9660_unmount, 88 .vfs_vget = cd9660_vget, 89 .vfs_vptofh = cd9660_vptofh, 90 }; 91 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 92 MODULE_VERSION(cd9660, 1); 93 94 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 95 struct thread *td); 96 97 /* 98 * VFS Operations. 99 */ 100 101 static int 102 cd9660_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 103 { 104 struct iso_args args; 105 int error; 106 107 error = copyin(data, &args, sizeof args); 108 if (error) 109 return (error); 110 111 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 112 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 113 ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64); 114 ma = mount_argsu(ma, "cs_local", args.cs_local, 64); 115 ma = mount_argf(ma, "ssector", "%u", args.ssector); 116 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip"); 117 ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens"); 118 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt"); 119 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet"); 120 ma = mount_argb(ma, 121 args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet"); 122 ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv"); 123 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "nogens"); 124 125 error = kernel_mount(ma, flags); 126 127 return (error); 128 } 129 130 static int 131 cd9660_mount(struct mount *mp, struct thread *td) 132 { 133 struct vnode *devvp; 134 struct export_args *export; 135 char *fspec; 136 int error, len; 137 mode_t accessmode; 138 struct nameidata ndp; 139 struct iso_mnt *imp = 0; 140 141 if ((mp->mnt_flag & MNT_RDONLY) == 0) 142 return (EROFS); 143 144 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 145 if (error) 146 return (error); 147 148 imp = VFSTOISOFS(mp); 149 /* 150 * If updating, check whether changing from read-only to 151 * read/write; if there is no device name, that's all we do. 152 */ 153 if (mp->mnt_flag & MNT_UPDATE) { 154 error = vfs_getopt(mp->mnt_optnew, 155 "export", (void **)&export, &len); 156 if (error == 0 && len == sizeof *export && export->ex_flags) 157 return (vfs_export(mp, export)); 158 } 159 /* 160 * Not an update, or updating the name: look up the name 161 * and verify that it refers to a sensible block device. 162 */ 163 NDINIT(&ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 164 if ((error = namei(&ndp))) 165 return (error); 166 NDFREE(&ndp, NDF_ONLY_PNBUF); 167 devvp = ndp.ni_vp; 168 169 if (!vn_isdisk(devvp, &error)) { 170 vrele(devvp); 171 return (error); 172 } 173 174 /* 175 * Verify that user has necessary permissions on the device, 176 * or has superuser abilities 177 */ 178 accessmode = VREAD; 179 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 180 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td); 181 if (error) 182 error = suser(td); 183 if (error) { 184 vput(devvp); 185 return (error); 186 } 187 VOP_UNLOCK(devvp, 0, td); 188 189 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 190 error = iso_mountfs(devvp, mp, td); 191 } else { 192 if (devvp != imp->im_devvp) 193 error = EINVAL; /* needs translation */ 194 else 195 vrele(devvp); 196 } 197 if (error) { 198 vrele(devvp); 199 return error; 200 } 201 vfs_mountedfrom(mp, fspec); 202 return 0; 203 } 204 205 /* 206 * Common code for mount and mountroot 207 */ 208 static int 209 iso_mountfs(devvp, mp, td) 210 struct vnode *devvp; 211 struct mount *mp; 212 struct thread *td; 213 { 214 struct iso_mnt *isomp = (struct iso_mnt *)0; 215 struct buf *bp = NULL; 216 struct buf *pribp = NULL, *supbp = NULL; 217 struct cdev *dev = devvp->v_rdev; 218 int error = EINVAL; 219 int high_sierra = 0; 220 int iso_bsize; 221 int iso_blknum; 222 int joliet_level; 223 struct iso_volume_descriptor *vdp = 0; 224 struct iso_primary_descriptor *pri = NULL; 225 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 226 struct iso_supplementary_descriptor *sup = NULL; 227 struct iso_directory_record *rootp; 228 int logical_block_size, ssector; 229 struct g_consumer *cp; 230 struct bufobj *bo; 231 char *cs_local, *cs_disk; 232 233 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 234 DROP_GIANT(); 235 g_topology_lock(); 236 error = g_vfs_open(devvp, &cp, "cd9660", 0); 237 g_topology_unlock(); 238 PICKUP_GIANT(); 239 VOP_UNLOCK(devvp, 0, td); 240 if (error) 241 return error; 242 if (devvp->v_rdev->si_iosize_max != 0) 243 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 244 if (mp->mnt_iosize_max > MAXPHYS) 245 mp->mnt_iosize_max = MAXPHYS; 246 247 bo = &devvp->v_bufobj; 248 bo->bo_private = cp; 249 bo->bo_ops = g_vfs_bufops; 250 251 /* This is the "logical sector size". The standard says this 252 * should be 2048 or the physical sector size on the device, 253 * whichever is greater. For now, we'll just use a constant. 254 */ 255 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 256 257 joliet_level = 0; 258 if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector)) 259 ssector = 0; 260 for (iso_blknum = 16 + ssector; 261 iso_blknum < 100 + ssector; 262 iso_blknum++) { 263 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 264 iso_bsize, NOCRED, &bp)) != 0) 265 goto out; 266 267 vdp = (struct iso_volume_descriptor *)bp->b_data; 268 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 269 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 270 sizeof vdp->id) != 0) { 271 error = EINVAL; 272 goto out; 273 } else 274 high_sierra = 1; 275 } 276 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 277 case ISO_VD_PRIMARY: 278 if (pribp == NULL) { 279 pribp = bp; 280 bp = NULL; 281 pri = (struct iso_primary_descriptor *)vdp; 282 pri_sierra = 283 (struct iso_sierra_primary_descriptor *)vdp; 284 } 285 break; 286 287 case ISO_VD_SUPPLEMENTARY: 288 if (supbp == NULL) { 289 supbp = bp; 290 bp = NULL; 291 sup = (struct iso_supplementary_descriptor *)vdp; 292 293 if (vfs_flagopt(mp->mnt_optnew, "joliet", NULL, 0)) { 294 if (bcmp(sup->escape, "%/@", 3) == 0) 295 joliet_level = 1; 296 if (bcmp(sup->escape, "%/C", 3) == 0) 297 joliet_level = 2; 298 if (bcmp(sup->escape, "%/E", 3) == 0) 299 joliet_level = 3; 300 301 if ((isonum_711 (sup->flags) & 1) && 302 !vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0)) 303 joliet_level = 0; 304 } 305 } 306 break; 307 308 case ISO_VD_END: 309 goto vd_end; 310 311 default: 312 break; 313 } 314 if (bp) { 315 brelse(bp); 316 bp = NULL; 317 } 318 } 319 vd_end: 320 if (bp) { 321 brelse(bp); 322 bp = NULL; 323 } 324 325 if (pri == NULL) { 326 error = EINVAL; 327 goto out; 328 } 329 330 logical_block_size = 331 isonum_723 (high_sierra? 332 pri_sierra->logical_block_size: 333 pri->logical_block_size); 334 335 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 336 || (logical_block_size & (logical_block_size - 1)) != 0) { 337 error = EINVAL; 338 goto out; 339 } 340 341 rootp = (struct iso_directory_record *) 342 (high_sierra? 343 pri_sierra->root_directory_record: 344 pri->root_directory_record); 345 346 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 347 isomp->im_cp = cp; 348 isomp->im_bo = bo; 349 isomp->logical_block_size = logical_block_size; 350 isomp->volume_space_size = 351 isonum_733 (high_sierra? 352 pri_sierra->volume_space_size: 353 pri->volume_space_size); 354 isomp->joliet_level = 0; 355 /* 356 * Since an ISO9660 multi-session CD can also access previous 357 * sessions, we have to include them into the space consider- 358 * ations. This doesn't yield a very accurate number since 359 * parts of the old sessions might be inaccessible now, but we 360 * can't do much better. This is also important for the NFS 361 * filehandle validation. 362 */ 363 isomp->volume_space_size += ssector; 364 bcopy (rootp, isomp->root, sizeof isomp->root); 365 isomp->root_extent = isonum_733 (rootp->extent); 366 isomp->root_size = isonum_733 (rootp->size); 367 368 isomp->im_bmask = logical_block_size - 1; 369 isomp->im_bshift = ffs(logical_block_size) - 1; 370 371 pribp->b_flags |= B_AGE; 372 brelse(pribp); 373 pribp = NULL; 374 375 mp->mnt_data = (qaddr_t)isomp; 376 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 377 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 378 mp->mnt_maxsymlinklen = 0; 379 mp->mnt_flag |= MNT_LOCAL; 380 isomp->im_mountp = mp; 381 isomp->im_dev = dev; 382 isomp->im_devvp = devvp; 383 384 vfs_flagopt(mp->mnt_optnew, "rrip", &isomp->im_flags, ISOFSMNT_NORRIP); 385 vfs_flagopt(mp->mnt_optnew, "gens", &isomp->im_flags, ISOFSMNT_GENS); 386 vfs_flagopt(mp->mnt_optnew, "extatt", &isomp->im_flags, ISOFSMNT_EXTATT); 387 vfs_flagopt(mp->mnt_optnew, "joliet", &isomp->im_flags, ISOFSMNT_NOJOLIET); 388 vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV); 389 isomp->im_flags ^= (ISOFSMNT_NORRIP | ISOFSMNT_NOJOLIET); 390 /* Check the Rock Ridge Extention support */ 391 if (vfs_flagopt(mp->mnt_optnew, "rrip", NULL, 0)) { 392 if ((error = bread(isomp->im_devvp, 393 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 394 (isomp->im_bshift - DEV_BSHIFT), 395 isomp->logical_block_size, NOCRED, &bp)) != 0) 396 goto out; 397 398 rootp = (struct iso_directory_record *)bp->b_data; 399 400 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 401 isomp->im_flags |= ISOFSMNT_NORRIP; 402 } else { 403 isomp->im_flags &= ~ISOFSMNT_GENS; 404 } 405 406 /* 407 * The contents are valid, 408 * but they will get reread as part of another vnode, so... 409 */ 410 bp->b_flags |= B_AGE; 411 brelse(bp); 412 bp = NULL; 413 } 414 415 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 416 cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error); 417 if (error) 418 goto out; 419 cs_disk = vfs_getopts(mp->mnt_optnew, "cs_disk", &error); 420 if (error) 421 goto out; 422 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l); 423 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d); 424 } else { 425 isomp->im_d2l = NULL; 426 isomp->im_l2d = NULL; 427 } 428 429 if (high_sierra) { 430 /* this effectively ignores all the mount flags */ 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 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 443 isomp->iso_ftype = ISO_FTYPE_RRIP; 444 break; 445 } 446 447 /* Decide whether to use the Joliet descriptor */ 448 449 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 450 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 451 rootp = (struct iso_directory_record *) 452 sup->root_directory_record; 453 bcopy (rootp, isomp->root, sizeof isomp->root); 454 isomp->root_extent = isonum_733 (rootp->extent); 455 isomp->root_size = isonum_733 (rootp->size); 456 isomp->joliet_level = joliet_level; 457 supbp->b_flags |= B_AGE; 458 } 459 460 if (supbp) { 461 brelse(supbp); 462 supbp = NULL; 463 } 464 465 return 0; 466 out: 467 if (bp) 468 brelse(bp); 469 if (pribp) 470 brelse(pribp); 471 if (supbp) 472 brelse(supbp); 473 if (cp != NULL) { 474 DROP_GIANT(); 475 g_topology_lock(); 476 g_vfs_close(cp, td); 477 g_topology_unlock(); 478 PICKUP_GIANT(); 479 } 480 if (isomp) { 481 free((caddr_t)isomp, M_ISOFSMNT); 482 mp->mnt_data = (qaddr_t)0; 483 } 484 return error; 485 } 486 487 /* 488 * unmount system call 489 */ 490 static int 491 cd9660_unmount(mp, mntflags, td) 492 struct mount *mp; 493 int mntflags; 494 struct thread *td; 495 { 496 struct iso_mnt *isomp; 497 int error, flags = 0; 498 499 if (mntflags & MNT_FORCE) 500 flags |= FORCECLOSE; 501 #if 0 502 mntflushbuf(mp, 0); 503 if (mntinvalbuf(mp)) 504 return EBUSY; 505 #endif 506 if ((error = vflush(mp, 0, flags, td))) 507 return (error); 508 509 isomp = VFSTOISOFS(mp); 510 511 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 512 if (isomp->im_d2l) 513 cd9660_iconv->close(isomp->im_d2l); 514 if (isomp->im_l2d) 515 cd9660_iconv->close(isomp->im_l2d); 516 } 517 DROP_GIANT(); 518 g_topology_lock(); 519 g_vfs_close(isomp->im_cp, td); 520 g_topology_unlock(); 521 PICKUP_GIANT(); 522 vrele(isomp->im_devvp); 523 free((caddr_t)isomp, M_ISOFSMNT); 524 mp->mnt_data = (qaddr_t)0; 525 mp->mnt_flag &= ~MNT_LOCAL; 526 return (error); 527 } 528 529 /* 530 * Return root of a filesystem 531 */ 532 static int 533 cd9660_root(mp, vpp, td) 534 struct mount *mp; 535 struct vnode **vpp; 536 struct thread *td; 537 { 538 struct iso_mnt *imp = VFSTOISOFS(mp); 539 struct iso_directory_record *dp = 540 (struct iso_directory_record *)imp->root; 541 ino_t ino = isodirino(dp, imp); 542 543 /* 544 * With RRIP we must use the `.' entry of the root directory. 545 * Simply tell vget, that it's a relocated directory. 546 */ 547 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp, 548 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 549 } 550 551 /* 552 * Get filesystem statistics. 553 */ 554 static int 555 cd9660_statfs(mp, sbp, td) 556 struct mount *mp; 557 struct statfs *sbp; 558 struct thread *td; 559 { 560 struct iso_mnt *isomp; 561 562 isomp = VFSTOISOFS(mp); 563 564 sbp->f_bsize = isomp->logical_block_size; 565 sbp->f_iosize = sbp->f_bsize; /* XXX */ 566 sbp->f_blocks = isomp->volume_space_size; 567 sbp->f_bfree = 0; /* total free blocks */ 568 sbp->f_bavail = 0; /* blocks free for non superuser */ 569 sbp->f_files = 0; /* total files */ 570 sbp->f_ffree = 0; /* free file nodes */ 571 return 0; 572 } 573 574 /* 575 * File handle to vnode 576 * 577 * Have to be really careful about stale file handles: 578 * - check that the inode number is in range 579 * - call iget() to get the locked inode 580 * - check for an unallocated inode (i_mode == 0) 581 * - check that the generation number matches 582 */ 583 584 struct ifid { 585 u_short ifid_len; 586 u_short ifid_pad; 587 int ifid_ino; 588 long ifid_start; 589 }; 590 591 /* ARGSUSED */ 592 static int 593 cd9660_fhtovp(mp, fhp, vpp) 594 struct mount *mp; 595 struct fid *fhp; 596 struct vnode **vpp; 597 { 598 struct ifid *ifhp = (struct ifid *)fhp; 599 struct iso_node *ip; 600 struct vnode *nvp; 601 int error; 602 603 #ifdef ISOFS_DBG 604 printf("fhtovp: ino %d, start %ld\n", 605 ifhp->ifid_ino, ifhp->ifid_start); 606 #endif 607 608 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 609 *vpp = NULLVP; 610 return (error); 611 } 612 ip = VTOI(nvp); 613 if (ip->inode.iso_mode == 0) { 614 vput(nvp); 615 *vpp = NULLVP; 616 return (ESTALE); 617 } 618 *vpp = nvp; 619 vnode_create_vobject(*vpp, ip->i_size, curthread); 620 return (0); 621 } 622 623 static int 624 cd9660_vget(mp, ino, flags, vpp) 625 struct mount *mp; 626 ino_t ino; 627 int flags; 628 struct vnode **vpp; 629 { 630 631 /* 632 * XXXX 633 * It would be nice if we didn't always set the `relocated' flag 634 * and force the extra read, but I don't want to think about fixing 635 * that right now. 636 */ 637 return (cd9660_vget_internal(mp, ino, flags, vpp, 638 #if 0 639 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 640 #else 641 0, 642 #endif 643 (struct iso_directory_record *)0)); 644 } 645 646 int 647 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir) 648 struct mount *mp; 649 ino_t ino; 650 int flags; 651 struct vnode **vpp; 652 int relocated; 653 struct iso_directory_record *isodir; 654 { 655 struct iso_mnt *imp; 656 struct iso_node *ip; 657 struct buf *bp; 658 struct vnode *vp; 659 struct cdev *dev; 660 int error; 661 662 imp = VFSTOISOFS(mp); 663 dev = imp->im_dev; 664 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0) 665 return (error); 666 if (*vpp != NULL) 667 return (0); 668 669 /* Allocate a new vnode/iso_node. */ 670 if ((error = getnewvnode("isofs", mp, &cd9660_vnodeops, &vp)) != 0) { 671 *vpp = NULLVP; 672 return (error); 673 } 674 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 675 M_WAITOK | M_ZERO); 676 vp->v_data = ip; 677 ip->i_vnode = vp; 678 ip->i_dev = dev; 679 ip->i_number = ino; 680 681 /* 682 * Check to be sure that it did not show up. We have to put it 683 * on the hash chain as the cleanup from vput expects to find 684 * it there. 685 */ 686 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0 || 687 *vpp != NULL) { 688 cd9660_ihashins(ip); 689 vput(vp); 690 return (error); 691 } 692 693 /* 694 * Put it onto its hash chain and lock it so that other requests for 695 * this inode will block if they arrive while we are sleeping waiting 696 * for old data structures to be purged or for the contents of the 697 * disk portion of this inode to be read. 698 */ 699 cd9660_ihashins(ip); 700 701 if (isodir == 0) { 702 int lbn, off; 703 704 lbn = lblkno(imp, ino); 705 if (lbn >= imp->volume_space_size) { 706 vput(vp); 707 printf("fhtovp: lbn exceed volume space %d\n", lbn); 708 return (ESTALE); 709 } 710 711 off = blkoff(imp, ino); 712 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 713 vput(vp); 714 printf("fhtovp: crosses block boundary %d\n", 715 off + ISO_DIRECTORY_RECORD_SIZE); 716 return (ESTALE); 717 } 718 719 error = bread(imp->im_devvp, 720 lbn << (imp->im_bshift - DEV_BSHIFT), 721 imp->logical_block_size, NOCRED, &bp); 722 if (error) { 723 vput(vp); 724 brelse(bp); 725 printf("fhtovp: bread error %d\n",error); 726 return (error); 727 } 728 isodir = (struct iso_directory_record *)(bp->b_data + off); 729 730 if (off + isonum_711(isodir->length) > 731 imp->logical_block_size) { 732 vput(vp); 733 if (bp != 0) 734 brelse(bp); 735 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 736 off +isonum_711(isodir->length), off, 737 isonum_711(isodir->length)); 738 return (ESTALE); 739 } 740 741 #if 0 742 if (isonum_733(isodir->extent) + 743 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 744 if (bp != 0) 745 brelse(bp); 746 printf("fhtovp: file start miss %d vs %d\n", 747 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 748 ifhp->ifid_start); 749 return (ESTALE); 750 } 751 #endif 752 } else 753 bp = 0; 754 755 ip->i_mnt = imp; 756 VREF(imp->im_devvp); 757 758 if (relocated) { 759 /* 760 * On relocated directories we must 761 * read the `.' entry out of a dir. 762 */ 763 ip->iso_start = ino >> imp->im_bshift; 764 if (bp != 0) 765 brelse(bp); 766 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 767 vput(vp); 768 return (error); 769 } 770 isodir = (struct iso_directory_record *)bp->b_data; 771 } 772 773 ip->iso_extent = isonum_733(isodir->extent); 774 ip->i_size = isonum_733(isodir->size); 775 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 776 777 /* 778 * Setup time stamp, attribute 779 */ 780 vp->v_type = VNON; 781 switch (imp->iso_ftype) { 782 default: /* ISO_FTYPE_9660 */ 783 { 784 struct buf *bp2; 785 int off; 786 if ((imp->im_flags & ISOFSMNT_EXTATT) 787 && (off = isonum_711(isodir->ext_attr_length))) 788 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 789 &bp2); 790 else 791 bp2 = NULL; 792 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 793 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 794 if (bp2) 795 brelse(bp2); 796 break; 797 } 798 case ISO_FTYPE_RRIP: 799 cd9660_rrip_analyze(isodir, ip, imp); 800 break; 801 } 802 803 if (bp != 0) 804 brelse(bp); 805 806 /* 807 * Initialize the associated vnode 808 */ 809 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 810 case VFIFO: 811 vp->v_op = &cd9660_fifoops; 812 break; 813 default: 814 break; 815 } 816 817 if (ip->iso_extent == imp->root_extent) 818 vp->v_vflag |= VV_ROOT; 819 820 /* 821 * XXX need generation number? 822 */ 823 824 *vpp = vp; 825 return (0); 826 } 827 828 /* 829 * Vnode pointer to File handle 830 */ 831 /* ARGSUSED */ 832 static int 833 cd9660_vptofh(vp, fhp) 834 struct vnode *vp; 835 struct fid *fhp; 836 { 837 struct iso_node *ip = VTOI(vp); 838 struct ifid *ifhp; 839 840 ifhp = (struct ifid *)fhp; 841 ifhp->ifid_len = sizeof(struct ifid); 842 843 ifhp->ifid_ino = ip->i_number; 844 ifhp->ifid_start = ip->iso_start; 845 846 #ifdef ISOFS_DBG 847 printf("vptofh: ino %d, start %ld\n", 848 ifhp->ifid_ino,ifhp->ifid_start); 849 #endif 850 return 0; 851 } 852