1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley 8 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 9 * Support code is derived from software contributed to Berkeley 10 * by Atsushi Murai (amurai@spec.co.jp). 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/namei.h> 40 #include <sys/priv.h> 41 #include <sys/proc.h> 42 #include <sys/kernel.h> 43 #include <sys/vnode.h> 44 #include <sys/mount.h> 45 #include <sys/bio.h> 46 #include <sys/buf.h> 47 #include <sys/cdio.h> 48 #include <sys/conf.h> 49 #include <sys/fcntl.h> 50 #include <sys/malloc.h> 51 #include <sys/stat.h> 52 #include <sys/syslog.h> 53 #include <sys/iconv.h> 54 55 #include <fs/cd9660/iso.h> 56 #include <fs/cd9660/iso_rrip.h> 57 #include <fs/cd9660/cd9660_node.h> 58 #include <fs/cd9660/cd9660_mount.h> 59 60 #include <geom/geom.h> 61 #include <geom/geom_vfs.h> 62 63 MALLOC_DEFINE(M_ISOFSMNT, "isofs_mount", "ISOFS mount structure"); 64 MALLOC_DEFINE(M_ISOFSNODE, "isofs_node", "ISOFS vnode private part"); 65 66 struct iconv_functions *cd9660_iconv = NULL; 67 68 static vfs_mount_t cd9660_mount; 69 static vfs_cmount_t cd9660_cmount; 70 static vfs_unmount_t cd9660_unmount; 71 static vfs_root_t cd9660_root; 72 static vfs_statfs_t cd9660_statfs; 73 static vfs_vget_t cd9660_vget; 74 static vfs_fhtovp_t cd9660_fhtovp; 75 76 static struct vfsops cd9660_vfsops = { 77 .vfs_fhtovp = cd9660_fhtovp, 78 .vfs_mount = cd9660_mount, 79 .vfs_cmount = cd9660_cmount, 80 .vfs_root = cd9660_root, 81 .vfs_statfs = cd9660_statfs, 82 .vfs_unmount = cd9660_unmount, 83 .vfs_vget = cd9660_vget, 84 }; 85 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 86 MODULE_VERSION(cd9660, 1); 87 88 static int cd9660_vfs_hash_cmp(struct vnode *vp, void *pino); 89 static int iso_mountfs(struct vnode *devvp, struct mount *mp); 90 91 /* 92 * VFS Operations. 93 */ 94 95 static int 96 cd9660_cmount(struct mntarg *ma, void *data, uint64_t flags) 97 { 98 struct iso_args args; 99 int error; 100 101 error = copyin(data, &args, sizeof args); 102 if (error) 103 return (error); 104 105 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 106 ma = mount_arg(ma, "export", &args.export, sizeof(args.export)); 107 ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64); 108 ma = mount_argsu(ma, "cs_local", args.cs_local, 64); 109 ma = mount_argf(ma, "ssector", "%u", args.ssector); 110 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip"); 111 ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens"); 112 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt"); 113 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet"); 114 ma = mount_argb(ma, 115 args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet"); 116 ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv"); 117 118 error = kernel_mount(ma, flags); 119 120 return (error); 121 } 122 123 static int 124 cd9660_mount(struct mount *mp) 125 { 126 struct vnode *devvp; 127 struct thread *td; 128 char *fspec; 129 int error; 130 accmode_t accmode; 131 struct nameidata ndp; 132 struct iso_mnt *imp = NULL; 133 134 td = curthread; 135 136 /* 137 * Unconditionally mount as read-only. 138 */ 139 MNT_ILOCK(mp); 140 mp->mnt_flag |= MNT_RDONLY; 141 MNT_IUNLOCK(mp); 142 143 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 144 if (error) 145 return (error); 146 147 imp = VFSTOISOFS(mp); 148 149 if (mp->mnt_flag & MNT_UPDATE) { 150 if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0)) 151 return (0); 152 } 153 /* 154 * Not an update, or updating the name: look up the name 155 * and verify that it refers to a sensible block device. 156 */ 157 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec); 158 if ((error = namei(&ndp))) 159 return (error); 160 NDFREE_PNBUF(&ndp); 161 devvp = ndp.ni_vp; 162 163 if (!vn_isdisk_error(devvp, &error)) { 164 vput(devvp); 165 return (error); 166 } 167 168 /* 169 * Verify that user has necessary permissions on the device, 170 * or has superuser abilities 171 */ 172 accmode = VREAD; 173 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 174 if (error) 175 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 176 if (error) { 177 vput(devvp); 178 return (error); 179 } 180 181 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 182 error = iso_mountfs(devvp, mp); 183 if (error) 184 vrele(devvp); 185 } else { 186 if (devvp != imp->im_devvp) 187 error = EINVAL; /* needs translation */ 188 vput(devvp); 189 } 190 if (error) 191 return (error); 192 vfs_mountedfrom(mp, fspec); 193 return (0); 194 } 195 196 /* 197 * Common code for mount and mountroot 198 */ 199 static int 200 iso_mountfs(struct vnode *devvp, struct mount *mp) 201 { 202 struct iso_mnt *isomp = NULL; 203 struct buf *bp = NULL; 204 struct buf *pribp = NULL, *supbp = NULL; 205 struct cdev *dev; 206 int error = EINVAL; 207 int high_sierra = 0; 208 int iso_bsize; 209 int iso_blknum; 210 int joliet_level; 211 int isverified = 0; 212 struct iso_volume_descriptor *vdp = NULL; 213 struct iso_primary_descriptor *pri = NULL; 214 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 215 struct iso_supplementary_descriptor *sup = NULL; 216 struct iso_directory_record *rootp; 217 int logical_block_size, ssector; 218 struct g_consumer *cp; 219 struct bufobj *bo; 220 char *cs_local, *cs_disk; 221 222 dev = devvp->v_rdev; 223 dev_ref(dev); 224 g_topology_lock(); 225 error = g_vfs_open(devvp, &cp, "cd9660", 0); 226 if (error == 0) 227 g_getattr("MNT::verified", cp, &isverified); 228 g_topology_unlock(); 229 VOP_UNLOCK(devvp); 230 if (error) 231 goto out; 232 if (devvp->v_rdev->si_iosize_max != 0) 233 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 234 if (mp->mnt_iosize_max > maxphys) 235 mp->mnt_iosize_max = maxphys; 236 237 bo = &devvp->v_bufobj; 238 239 /* This is the "logical sector size". The standard says this 240 * should be 2048 or the physical sector size on the device, 241 * whichever is greater. 242 */ 243 if ((ISO_DEFAULT_BLOCK_SIZE % cp->provider->sectorsize) != 0) { 244 error = EINVAL; 245 goto out; 246 } 247 248 iso_bsize = cp->provider->sectorsize; 249 250 joliet_level = 0; 251 if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector)) 252 ssector = 0; 253 for (iso_blknum = 16 + ssector; 254 iso_blknum < 100 + ssector; 255 iso_blknum++) { 256 if ((error = bread(devvp, iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE), 257 iso_bsize, NOCRED, &bp)) != 0) 258 goto out; 259 260 vdp = (struct iso_volume_descriptor *)bp->b_data; 261 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 262 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 263 sizeof vdp->id_sierra) != 0) { 264 error = EINVAL; 265 goto out; 266 } else 267 high_sierra = 1; 268 } 269 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 270 case ISO_VD_PRIMARY: 271 if (pribp == NULL) { 272 pribp = bp; 273 bp = NULL; 274 pri = (struct iso_primary_descriptor *)vdp; 275 pri_sierra = 276 (struct iso_sierra_primary_descriptor *)vdp; 277 } 278 break; 279 280 case ISO_VD_SUPPLEMENTARY: 281 if (supbp == NULL) { 282 supbp = bp; 283 bp = NULL; 284 sup = (struct iso_supplementary_descriptor *)vdp; 285 286 if (!vfs_flagopt(mp->mnt_optnew, "nojoliet", NULL, 0)) { 287 if (bcmp(sup->escape, "%/@", 3) == 0) 288 joliet_level = 1; 289 if (bcmp(sup->escape, "%/C", 3) == 0) 290 joliet_level = 2; 291 if (bcmp(sup->escape, "%/E", 3) == 0) 292 joliet_level = 3; 293 294 if ((isonum_711 (sup->flags) & 1) && 295 !vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0)) 296 joliet_level = 0; 297 } 298 } 299 break; 300 301 case ISO_VD_END: 302 goto vd_end; 303 304 default: 305 break; 306 } 307 if (bp != NULL) { 308 brelse(bp); 309 bp = NULL; 310 } 311 } 312 vd_end: 313 if (bp != NULL) { 314 brelse(bp); 315 bp = NULL; 316 } 317 318 if (pri == NULL) { 319 error = EINVAL; 320 goto out; 321 } 322 323 logical_block_size = 324 isonum_723 (high_sierra? 325 pri_sierra->logical_block_size: 326 pri->logical_block_size); 327 328 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 329 || (logical_block_size & (logical_block_size - 1)) != 0) { 330 error = EINVAL; 331 goto out; 332 } 333 334 if (logical_block_size < cp->provider->sectorsize) { 335 printf("cd9660: Unsupported logical block size %u\n", 336 logical_block_size); 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 memcpy(isomp->root, rootp, 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 rootp = NULL; 375 pri = NULL; 376 pri_sierra = NULL; 377 378 mp->mnt_data = isomp; 379 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 380 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 381 MNT_ILOCK(mp); 382 if (isverified) 383 mp->mnt_flag |= MNT_VERIFIED; 384 mp->mnt_flag |= MNT_LOCAL; 385 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED; 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, (isomp->root_extent + 400 isonum_711(((struct iso_directory_record *)isomp->root)-> 401 ext_attr_length)) << (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 rootp = 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 memcpy(isomp->root, rootp, 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 sup = NULL; 476 } 477 478 return 0; 479 out: 480 if (bp != NULL) 481 brelse(bp); 482 if (pribp != NULL) 483 brelse(pribp); 484 if (supbp != NULL) 485 brelse(supbp); 486 if (cp != NULL) { 487 g_topology_lock(); 488 g_vfs_close(cp); 489 g_topology_unlock(); 490 } 491 if (isomp) { 492 free(isomp, M_ISOFSMNT); 493 mp->mnt_data = NULL; 494 } 495 dev_rel(dev); 496 return error; 497 } 498 499 /* 500 * unmount system call 501 */ 502 static int 503 cd9660_unmount(struct mount *mp, int mntflags) 504 { 505 struct iso_mnt *isomp; 506 int error, flags = 0; 507 508 if (mntflags & MNT_FORCE) 509 flags |= FORCECLOSE; 510 if ((error = vflush(mp, 0, flags, curthread))) 511 return (error); 512 513 isomp = VFSTOISOFS(mp); 514 515 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 516 if (isomp->im_d2l) 517 cd9660_iconv->close(isomp->im_d2l); 518 if (isomp->im_l2d) 519 cd9660_iconv->close(isomp->im_l2d); 520 } 521 g_topology_lock(); 522 g_vfs_close(isomp->im_cp); 523 g_topology_unlock(); 524 vrele(isomp->im_devvp); 525 dev_rel(isomp->im_dev); 526 free(isomp, M_ISOFSMNT); 527 mp->mnt_data = NULL; 528 return (error); 529 } 530 531 /* 532 * Return root of a filesystem 533 */ 534 static int 535 cd9660_root(struct mount *mp, int flags, struct vnode **vpp) 536 { 537 struct iso_mnt *imp = VFSTOISOFS(mp); 538 struct iso_directory_record *dp = 539 (struct iso_directory_record *)imp->root; 540 cd_ino_t ino = isodirino(dp, imp); 541 542 /* 543 * With RRIP we must use the `.' entry of the root directory. 544 * Simply tell vget, that it's a relocated directory. 545 */ 546 return (cd9660_vget_internal(mp, ino, flags, vpp, 547 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 548 } 549 550 /* 551 * Get filesystem statistics. 552 */ 553 static int 554 cd9660_statfs(struct mount *mp, struct statfs *sbp) 555 { 556 struct iso_mnt *isomp; 557 558 isomp = VFSTOISOFS(mp); 559 560 sbp->f_bsize = isomp->logical_block_size; 561 sbp->f_iosize = sbp->f_bsize; /* XXX */ 562 sbp->f_blocks = isomp->volume_space_size; 563 sbp->f_bfree = 0; /* total free blocks */ 564 sbp->f_bavail = 0; /* blocks free for non superuser */ 565 sbp->f_files = 0; /* total files */ 566 sbp->f_ffree = 0; /* free file nodes */ 567 return 0; 568 } 569 570 /* 571 * File handle to vnode 572 * 573 * Have to be really careful about stale file handles: 574 * - check that the inode number is in range 575 * - call iget() to get the locked inode 576 * - check for an unallocated inode (i_mode == 0) 577 * - check that the generation number matches 578 */ 579 580 /* ARGSUSED */ 581 static int 582 cd9660_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp) 583 { 584 struct ifid ifh; 585 struct iso_node *ip; 586 struct vnode *nvp; 587 int error; 588 589 memcpy(&ifh, fhp, sizeof(ifh)); 590 591 #ifdef ISOFS_DBG 592 printf("fhtovp: ino %d, start %ld\n", 593 ifh.ifid_ino, ifh.ifid_start); 594 #endif 595 596 if ((error = VFS_VGET(mp, ifh.ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 597 *vpp = NULLVP; 598 return (error); 599 } 600 ip = VTOI(nvp); 601 if (ip->inode.iso_mode == 0) { 602 vput(nvp); 603 *vpp = NULLVP; 604 return (ESTALE); 605 } 606 *vpp = nvp; 607 vnode_create_vobject(*vpp, ip->i_size, curthread); 608 return (0); 609 } 610 611 /* 612 * Conform to standard VFS interface; can't vget arbitrary inodes beyond 4GB 613 * into media with current inode scheme and 32-bit ino_t. This shouldn't be 614 * needed for anything other than nfsd, and who exports a mounted DVD over NFS? 615 */ 616 static int 617 cd9660_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 618 { 619 620 /* 621 * XXXX 622 * It would be nice if we didn't always set the `relocated' flag 623 * and force the extra read, but I don't want to think about fixing 624 * that right now. 625 */ 626 return (cd9660_vget_internal(mp, ino, flags, vpp, 627 #if 0 628 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 629 #else 630 0, 631 #endif 632 (struct iso_directory_record *)0)); 633 } 634 635 /* Use special comparator for full 64-bit ino comparison. */ 636 static int 637 cd9660_vfs_hash_cmp(struct vnode *vp, void *pino) 638 { 639 struct iso_node *ip; 640 cd_ino_t ino; 641 642 ip = VTOI(vp); 643 ino = *(cd_ino_t *)pino; 644 return (ip->i_number != ino); 645 } 646 647 int 648 cd9660_vget_internal(struct mount *mp, cd_ino_t ino, int flags, 649 struct vnode **vpp, int relocated, struct iso_directory_record *isodir) 650 { 651 struct iso_mnt *imp; 652 struct iso_node *ip; 653 struct buf *bp; 654 struct vnode *vp; 655 int error; 656 struct thread *td; 657 658 td = curthread; 659 error = vfs_hash_get(mp, ino, flags, td, vpp, cd9660_vfs_hash_cmp, 660 &ino); 661 if (error || *vpp != NULL) 662 return (error); 663 664 /* 665 * We must promote to an exclusive lock for vnode creation. This 666 * can happen if lookup is passed LOCKSHARED. 667 */ 668 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 669 flags &= ~LK_TYPE_MASK; 670 flags |= LK_EXCLUSIVE; 671 } 672 673 /* 674 * We do not lock vnode creation as it is believed to be too 675 * expensive for such rare case as simultaneous creation of vnode 676 * for same ino by different processes. We just allow them to race 677 * and check later to decide who wins. Let the race begin! 678 */ 679 680 imp = VFSTOISOFS(mp); 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 ip = malloc(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 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 694 error = insmntque(vp, mp); 695 if (error != 0) { 696 free(ip, M_ISOFSNODE); 697 *vpp = NULLVP; 698 return (error); 699 } 700 error = vfs_hash_insert(vp, ino, flags, td, vpp, cd9660_vfs_hash_cmp, 701 &ino); 702 if (error || *vpp != NULL) 703 return (error); 704 705 if (isodir == NULL) { 706 int lbn, off; 707 708 lbn = lblkno(imp, ino); 709 if (lbn >= imp->volume_space_size) { 710 vput(vp); 711 printf("fhtovp: lbn exceed volume space %d\n", lbn); 712 return (ESTALE); 713 } 714 715 off = blkoff(imp, ino); 716 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 717 vput(vp); 718 printf("fhtovp: crosses block boundary %d\n", 719 off + ISO_DIRECTORY_RECORD_SIZE); 720 return (ESTALE); 721 } 722 723 error = bread(imp->im_devvp, 724 lbn << (imp->im_bshift - DEV_BSHIFT), 725 imp->logical_block_size, NOCRED, &bp); 726 if (error) { 727 vput(vp); 728 printf("fhtovp: bread error %d\n",error); 729 return (error); 730 } 731 isodir = (struct iso_directory_record *)(bp->b_data + off); 732 733 if (off + isonum_711(isodir->length) > 734 imp->logical_block_size) { 735 vput(vp); 736 brelse(bp); 737 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 738 off +isonum_711(isodir->length), off, 739 isonum_711(isodir->length)); 740 return (ESTALE); 741 } 742 743 #if 0 744 if (isonum_733(isodir->extent) + 745 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 746 brelse(bp); 747 printf("fhtovp: file start miss %d vs %d\n", 748 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 749 ifhp->ifid_start); 750 return (ESTALE); 751 } 752 #endif 753 } else 754 bp = NULL; 755 756 ip->i_mnt = imp; 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 != NULL) 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 brelse(bp); 804 805 /* 806 * Initialize the associated vnode 807 */ 808 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 809 case VFIFO: 810 vp->v_op = &cd9660_fifoops; 811 break; 812 default: 813 VN_LOCK_ASHARE(vp); 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 vn_set_state(vp, VSTATE_CONSTRUCTED); 825 *vpp = vp; 826 return (0); 827 } 828