1 /*- 2 * Copyright (c) 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley 6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 7 * Support code is derived from software contributed to Berkeley 8 * by Atsushi Murai (amurai@spec.co.jp). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/priv.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/vnode.h> 47 #include <sys/mount.h> 48 #include <sys/bio.h> 49 #include <sys/buf.h> 50 #include <sys/cdio.h> 51 #include <sys/conf.h> 52 #include <sys/fcntl.h> 53 #include <sys/malloc.h> 54 #include <sys/stat.h> 55 #include <sys/syslog.h> 56 #include <sys/iconv.h> 57 58 #include <fs/cd9660/iso.h> 59 #include <fs/cd9660/iso_rrip.h> 60 #include <fs/cd9660/cd9660_node.h> 61 #include <fs/cd9660/cd9660_mount.h> 62 63 #include <geom/geom.h> 64 #include <geom/geom_vfs.h> 65 66 MALLOC_DEFINE(M_ISOFSMNT, "isofs_mount", "ISOFS mount structure"); 67 MALLOC_DEFINE(M_ISOFSNODE, "isofs_node", "ISOFS vnode private part"); 68 69 struct iconv_functions *cd9660_iconv = NULL; 70 71 static vfs_mount_t cd9660_mount; 72 static vfs_cmount_t cd9660_cmount; 73 static vfs_unmount_t cd9660_unmount; 74 static vfs_root_t cd9660_root; 75 static vfs_statfs_t cd9660_statfs; 76 static vfs_vget_t cd9660_vget; 77 static vfs_fhtovp_t cd9660_fhtovp; 78 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 }; 88 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 89 MODULE_VERSION(cd9660, 1); 90 91 static int iso_mountfs(struct vnode *devvp, struct mount *mp); 92 93 /* 94 * VFS Operations. 95 */ 96 97 static int 98 cd9660_cmount(struct mntarg *ma, void *data, int flags) 99 { 100 struct iso_args args; 101 int error; 102 103 error = copyin(data, &args, sizeof args); 104 if (error) 105 return (error); 106 107 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 108 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 109 ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64); 110 ma = mount_argsu(ma, "cs_local", args.cs_local, 64); 111 ma = mount_argf(ma, "ssector", "%u", args.ssector); 112 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip"); 113 ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens"); 114 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt"); 115 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet"); 116 ma = mount_argb(ma, 117 args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet"); 118 ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv"); 119 120 error = kernel_mount(ma, flags); 121 122 return (error); 123 } 124 125 static int 126 cd9660_mount(struct mount *mp) 127 { 128 struct vnode *devvp; 129 struct thread *td; 130 char *fspec; 131 int error; 132 accmode_t accmode; 133 struct nameidata ndp; 134 struct iso_mnt *imp = 0; 135 136 td = curthread; 137 138 /* 139 * Unconditionally mount as read-only. 140 */ 141 MNT_ILOCK(mp); 142 mp->mnt_flag |= MNT_RDONLY; 143 MNT_IUNLOCK(mp); 144 145 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 146 if (error) 147 return (error); 148 149 imp = VFSTOISOFS(mp); 150 151 if (mp->mnt_flag & MNT_UPDATE) { 152 if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0)) 153 return (0); 154 } 155 /* 156 * Not an update, or updating the name: look up the name 157 * and verify that it refers to a sensible block device. 158 */ 159 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 160 if ((error = namei(&ndp))) 161 return (error); 162 NDFREE(&ndp, NDF_ONLY_PNBUF); 163 devvp = ndp.ni_vp; 164 165 if (!vn_isdisk(devvp, &error)) { 166 vput(devvp); 167 return (error); 168 } 169 170 /* 171 * Verify that user has necessary permissions on the device, 172 * or has superuser abilities 173 */ 174 accmode = VREAD; 175 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 176 if (error) 177 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 178 if (error) { 179 vput(devvp); 180 return (error); 181 } 182 183 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 184 error = iso_mountfs(devvp, mp); 185 if (error) 186 vrele(devvp); 187 } else { 188 if (devvp != imp->im_devvp) 189 error = EINVAL; /* needs translation */ 190 vput(devvp); 191 } 192 if (error) 193 return (error); 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) 203 struct vnode *devvp; 204 struct mount *mp; 205 { 206 struct iso_mnt *isomp = (struct iso_mnt *)0; 207 struct buf *bp = NULL; 208 struct buf *pribp = NULL, *supbp = NULL; 209 struct cdev *dev; 210 int error = EINVAL; 211 int high_sierra = 0; 212 int iso_bsize; 213 int iso_blknum; 214 int joliet_level; 215 struct iso_volume_descriptor *vdp = 0; 216 struct iso_primary_descriptor *pri = NULL; 217 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 218 struct iso_supplementary_descriptor *sup = NULL; 219 struct iso_directory_record *rootp; 220 int logical_block_size, ssector; 221 struct g_consumer *cp; 222 struct bufobj *bo; 223 char *cs_local, *cs_disk; 224 225 dev = devvp->v_rdev; 226 dev_ref(dev); 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); 233 if (error) 234 goto out; 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; 241 242 /* This is the "logical sector size". The standard says this 243 * should be 2048 or the physical sector size on the device, 244 * whichever is greater. 245 */ 246 if ((ISO_DEFAULT_BLOCK_SIZE % cp->provider->sectorsize) != 0) { 247 error = EINVAL; 248 goto out; 249 } 250 251 iso_bsize = cp->provider->sectorsize; 252 253 joliet_level = 0; 254 if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector)) 255 ssector = 0; 256 for (iso_blknum = 16 + ssector; 257 iso_blknum < 100 + ssector; 258 iso_blknum++) { 259 if ((error = bread(devvp, iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE), 260 iso_bsize, NOCRED, &bp)) != 0) 261 goto out; 262 263 vdp = (struct iso_volume_descriptor *)bp->b_data; 264 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 265 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 266 sizeof vdp->id_sierra) != 0) { 267 error = EINVAL; 268 goto out; 269 } else 270 high_sierra = 1; 271 } 272 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 273 case ISO_VD_PRIMARY: 274 if (pribp == NULL) { 275 pribp = bp; 276 bp = NULL; 277 pri = (struct iso_primary_descriptor *)vdp; 278 pri_sierra = 279 (struct iso_sierra_primary_descriptor *)vdp; 280 } 281 break; 282 283 case ISO_VD_SUPPLEMENTARY: 284 if (supbp == NULL) { 285 supbp = bp; 286 bp = NULL; 287 sup = (struct iso_supplementary_descriptor *)vdp; 288 289 if (!vfs_flagopt(mp->mnt_optnew, "nojoliet", NULL, 0)) { 290 if (bcmp(sup->escape, "%/@", 3) == 0) 291 joliet_level = 1; 292 if (bcmp(sup->escape, "%/C", 3) == 0) 293 joliet_level = 2; 294 if (bcmp(sup->escape, "%/E", 3) == 0) 295 joliet_level = 3; 296 297 if ((isonum_711 (sup->flags) & 1) && 298 !vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0)) 299 joliet_level = 0; 300 } 301 } 302 break; 303 304 case ISO_VD_END: 305 goto vd_end; 306 307 default: 308 break; 309 } 310 if (bp) { 311 brelse(bp); 312 bp = NULL; 313 } 314 } 315 vd_end: 316 if (bp) { 317 brelse(bp); 318 bp = NULL; 319 } 320 321 if (pri == NULL) { 322 error = EINVAL; 323 goto out; 324 } 325 326 logical_block_size = 327 isonum_723 (high_sierra? 328 pri_sierra->logical_block_size: 329 pri->logical_block_size); 330 331 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 332 || (logical_block_size & (logical_block_size - 1)) != 0) { 333 error = EINVAL; 334 goto out; 335 } 336 337 rootp = (struct iso_directory_record *) 338 (high_sierra? 339 pri_sierra->root_directory_record: 340 pri->root_directory_record); 341 342 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 343 isomp->im_cp = cp; 344 isomp->im_bo = bo; 345 isomp->logical_block_size = logical_block_size; 346 isomp->volume_space_size = 347 isonum_733 (high_sierra? 348 pri_sierra->volume_space_size: 349 pri->volume_space_size); 350 isomp->joliet_level = 0; 351 /* 352 * Since an ISO9660 multi-session CD can also access previous 353 * sessions, we have to include them into the space consider- 354 * ations. This doesn't yield a very accurate number since 355 * parts of the old sessions might be inaccessible now, but we 356 * can't do much better. This is also important for the NFS 357 * filehandle validation. 358 */ 359 isomp->volume_space_size += ssector; 360 bcopy (rootp, isomp->root, sizeof isomp->root); 361 isomp->root_extent = isonum_733 (rootp->extent); 362 isomp->root_size = isonum_733 (rootp->size); 363 364 isomp->im_bmask = logical_block_size - 1; 365 isomp->im_bshift = ffs(logical_block_size) - 1; 366 367 pribp->b_flags |= B_AGE; 368 brelse(pribp); 369 pribp = NULL; 370 371 mp->mnt_data = isomp; 372 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 373 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 374 mp->mnt_maxsymlinklen = 0; 375 MNT_ILOCK(mp); 376 mp->mnt_flag |= MNT_LOCAL; 377 mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED | 378 MNTK_EXTENDED_SHARED; 379 MNT_IUNLOCK(mp); 380 isomp->im_mountp = mp; 381 isomp->im_dev = dev; 382 isomp->im_devvp = devvp; 383 384 vfs_flagopt(mp->mnt_optnew, "norrip", &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, "nojoliet", &isomp->im_flags, ISOFSMNT_NOJOLIET); 388 vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV); 389 390 /* Check the Rock Ridge Extension support */ 391 if (!(isomp->im_flags & ISOFSMNT_NORRIP)) { 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 if (bootverbose) 432 log(LOG_INFO, "cd9660: High Sierra Format\n"); 433 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 434 } else 435 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 436 default: 437 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 438 break; 439 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 440 isomp->iso_ftype = ISO_FTYPE_9660; 441 break; 442 case 0: 443 if (bootverbose) 444 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 445 isomp->iso_ftype = ISO_FTYPE_RRIP; 446 break; 447 } 448 449 /* Decide whether to use the Joliet descriptor */ 450 451 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 452 if (bootverbose) 453 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", 454 joliet_level); 455 rootp = (struct iso_directory_record *) 456 sup->root_directory_record; 457 bcopy (rootp, isomp->root, sizeof isomp->root); 458 isomp->root_extent = isonum_733 (rootp->extent); 459 isomp->root_size = isonum_733 (rootp->size); 460 isomp->joliet_level = joliet_level; 461 supbp->b_flags |= B_AGE; 462 } 463 464 if (supbp) { 465 brelse(supbp); 466 supbp = NULL; 467 } 468 469 return 0; 470 out: 471 if (bp) 472 brelse(bp); 473 if (pribp) 474 brelse(pribp); 475 if (supbp) 476 brelse(supbp); 477 if (cp != NULL) { 478 DROP_GIANT(); 479 g_topology_lock(); 480 g_vfs_close(cp); 481 g_topology_unlock(); 482 PICKUP_GIANT(); 483 } 484 if (isomp) { 485 free((caddr_t)isomp, M_ISOFSMNT); 486 mp->mnt_data = NULL; 487 } 488 dev_rel(dev); 489 return error; 490 } 491 492 /* 493 * unmount system call 494 */ 495 static int 496 cd9660_unmount(mp, mntflags) 497 struct mount *mp; 498 int mntflags; 499 { 500 struct iso_mnt *isomp; 501 int error, flags = 0; 502 503 if (mntflags & MNT_FORCE) 504 flags |= FORCECLOSE; 505 if ((error = vflush(mp, 0, flags, curthread))) 506 return (error); 507 508 isomp = VFSTOISOFS(mp); 509 510 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 511 if (isomp->im_d2l) 512 cd9660_iconv->close(isomp->im_d2l); 513 if (isomp->im_l2d) 514 cd9660_iconv->close(isomp->im_l2d); 515 } 516 DROP_GIANT(); 517 g_topology_lock(); 518 g_vfs_close(isomp->im_cp); 519 g_topology_unlock(); 520 PICKUP_GIANT(); 521 vrele(isomp->im_devvp); 522 dev_rel(isomp->im_dev); 523 free((caddr_t)isomp, M_ISOFSMNT); 524 mp->mnt_data = NULL; 525 MNT_ILOCK(mp); 526 mp->mnt_flag &= ~MNT_LOCAL; 527 MNT_IUNLOCK(mp); 528 return (error); 529 } 530 531 /* 532 * Return root of a filesystem 533 */ 534 static int 535 cd9660_root(mp, flags, vpp) 536 struct mount *mp; 537 int flags; 538 struct vnode **vpp; 539 { 540 struct iso_mnt *imp = VFSTOISOFS(mp); 541 struct iso_directory_record *dp = 542 (struct iso_directory_record *)imp->root; 543 ino_t ino = isodirino(dp, imp); 544 545 /* 546 * With RRIP we must use the `.' entry of the root directory. 547 * Simply tell vget, that it's a relocated directory. 548 */ 549 return (cd9660_vget_internal(mp, ino, flags, vpp, 550 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 551 } 552 553 /* 554 * Get filesystem statistics. 555 */ 556 static int 557 cd9660_statfs(mp, sbp) 558 struct mount *mp; 559 struct statfs *sbp; 560 { 561 struct iso_mnt *isomp; 562 563 isomp = VFSTOISOFS(mp); 564 565 sbp->f_bsize = isomp->logical_block_size; 566 sbp->f_iosize = sbp->f_bsize; /* XXX */ 567 sbp->f_blocks = isomp->volume_space_size; 568 sbp->f_bfree = 0; /* total free blocks */ 569 sbp->f_bavail = 0; /* blocks free for non superuser */ 570 sbp->f_files = 0; /* total files */ 571 sbp->f_ffree = 0; /* free file nodes */ 572 return 0; 573 } 574 575 /* 576 * File handle to vnode 577 * 578 * Have to be really careful about stale file handles: 579 * - check that the inode number is in range 580 * - call iget() to get the locked inode 581 * - check for an unallocated inode (i_mode == 0) 582 * - check that the generation number matches 583 */ 584 585 /* ARGSUSED */ 586 static int 587 cd9660_fhtovp(mp, fhp, vpp) 588 struct mount *mp; 589 struct fid *fhp; 590 struct vnode **vpp; 591 { 592 struct ifid ifh; 593 struct iso_node *ip; 594 struct vnode *nvp; 595 int error; 596 597 memcpy(&ifh, fhp, sizeof(ifh)); 598 599 #ifdef ISOFS_DBG 600 printf("fhtovp: ino %d, start %ld\n", 601 ifh.ifid_ino, ifh.ifid_start); 602 #endif 603 604 if ((error = VFS_VGET(mp, ifh.ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 605 *vpp = NULLVP; 606 return (error); 607 } 608 ip = VTOI(nvp); 609 if (ip->inode.iso_mode == 0) { 610 vput(nvp); 611 *vpp = NULLVP; 612 return (ESTALE); 613 } 614 *vpp = nvp; 615 vnode_create_vobject(*vpp, ip->i_size, curthread); 616 return (0); 617 } 618 619 static int 620 cd9660_vget(mp, ino, flags, vpp) 621 struct mount *mp; 622 ino_t ino; 623 int flags; 624 struct vnode **vpp; 625 { 626 627 /* 628 * XXXX 629 * It would be nice if we didn't always set the `relocated' flag 630 * and force the extra read, but I don't want to think about fixing 631 * that right now. 632 */ 633 return (cd9660_vget_internal(mp, ino, flags, vpp, 634 #if 0 635 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 636 #else 637 0, 638 #endif 639 (struct iso_directory_record *)0)); 640 } 641 642 int 643 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir) 644 struct mount *mp; 645 ino_t ino; 646 int flags; 647 struct vnode **vpp; 648 int relocated; 649 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 struct cdev *dev; 656 int error; 657 struct thread *td; 658 659 td = curthread; 660 error = vfs_hash_get(mp, ino, flags, td, vpp, NULL, NULL); 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 dev = imp->im_dev; 682 683 /* Allocate a new vnode/iso_node. */ 684 if ((error = getnewvnode("isofs", mp, &cd9660_vnodeops, &vp)) != 0) { 685 *vpp = NULLVP; 686 return (error); 687 } 688 ip = malloc(sizeof(struct iso_node), M_ISOFSNODE, 689 M_WAITOK | M_ZERO); 690 vp->v_data = ip; 691 ip->i_vnode = vp; 692 ip->i_number = ino; 693 694 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 695 error = insmntque(vp, mp); 696 if (error != 0) { 697 free(ip, M_ISOFSNODE); 698 *vpp = NULLVP; 699 return (error); 700 } 701 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL); 702 if (error || *vpp != NULL) 703 return (error); 704 705 if (isodir == 0) { 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 brelse(bp); 729 printf("fhtovp: bread error %d\n",error); 730 return (error); 731 } 732 isodir = (struct iso_directory_record *)(bp->b_data + off); 733 734 if (off + isonum_711(isodir->length) > 735 imp->logical_block_size) { 736 vput(vp); 737 if (bp != 0) 738 brelse(bp); 739 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 740 off +isonum_711(isodir->length), off, 741 isonum_711(isodir->length)); 742 return (ESTALE); 743 } 744 745 #if 0 746 if (isonum_733(isodir->extent) + 747 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 748 if (bp != 0) 749 brelse(bp); 750 printf("fhtovp: file start miss %d vs %d\n", 751 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 752 ifhp->ifid_start); 753 return (ESTALE); 754 } 755 #endif 756 } else 757 bp = 0; 758 759 ip->i_mnt = imp; 760 761 if (relocated) { 762 /* 763 * On relocated directories we must 764 * read the `.' entry out of a dir. 765 */ 766 ip->iso_start = ino >> imp->im_bshift; 767 if (bp != 0) 768 brelse(bp); 769 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 770 vput(vp); 771 return (error); 772 } 773 isodir = (struct iso_directory_record *)bp->b_data; 774 } 775 776 ip->iso_extent = isonum_733(isodir->extent); 777 ip->i_size = isonum_733(isodir->size); 778 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 779 780 /* 781 * Setup time stamp, attribute 782 */ 783 vp->v_type = VNON; 784 switch (imp->iso_ftype) { 785 default: /* ISO_FTYPE_9660 */ 786 { 787 struct buf *bp2; 788 int off; 789 if ((imp->im_flags & ISOFSMNT_EXTATT) 790 && (off = isonum_711(isodir->ext_attr_length))) 791 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 792 &bp2); 793 else 794 bp2 = NULL; 795 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 796 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 797 if (bp2) 798 brelse(bp2); 799 break; 800 } 801 case ISO_FTYPE_RRIP: 802 cd9660_rrip_analyze(isodir, ip, imp); 803 break; 804 } 805 806 if (bp != 0) 807 brelse(bp); 808 809 /* 810 * Initialize the associated vnode 811 */ 812 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 813 case VFIFO: 814 vp->v_op = &cd9660_fifoops; 815 break; 816 default: 817 VN_LOCK_ASHARE(vp); 818 break; 819 } 820 821 if (ip->iso_extent == imp->root_extent) 822 vp->v_vflag |= VV_ROOT; 823 824 /* 825 * XXX need generation number? 826 */ 827 828 *vpp = vp; 829 return (0); 830 } 831