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 * 3. 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 cd9660_vfs_hash_cmp(struct vnode *vp, void *pino); 92 static int iso_mountfs(struct vnode *devvp, struct mount *mp); 93 94 /* 95 * VFS Operations. 96 */ 97 98 static int 99 cd9660_cmount(struct mntarg *ma, void *data, uint64_t flags) 100 { 101 struct iso_args args; 102 struct export_args exp; 103 int error; 104 105 error = copyin(data, &args, sizeof args); 106 if (error) 107 return (error); 108 vfs_oexport_conv(&args.export, &exp); 109 110 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 111 ma = mount_arg(ma, "export", &exp, sizeof(exp)); 112 ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64); 113 ma = mount_argsu(ma, "cs_local", args.cs_local, 64); 114 ma = mount_argf(ma, "ssector", "%u", args.ssector); 115 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip"); 116 ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens"); 117 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt"); 118 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet"); 119 ma = mount_argb(ma, 120 args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet"); 121 ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv"); 122 123 error = kernel_mount(ma, flags); 124 125 return (error); 126 } 127 128 static int 129 cd9660_mount(struct mount *mp) 130 { 131 struct vnode *devvp; 132 struct thread *td; 133 char *fspec; 134 int error; 135 accmode_t accmode; 136 struct nameidata ndp; 137 struct iso_mnt *imp = NULL; 138 139 td = curthread; 140 141 /* 142 * Unconditionally mount as read-only. 143 */ 144 MNT_ILOCK(mp); 145 mp->mnt_flag |= MNT_RDONLY; 146 MNT_IUNLOCK(mp); 147 148 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 149 if (error) 150 return (error); 151 152 imp = VFSTOISOFS(mp); 153 154 if (mp->mnt_flag & MNT_UPDATE) { 155 if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0)) 156 return (0); 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 | LOCKLEAF, 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 vput(devvp); 170 return (error); 171 } 172 173 /* 174 * Verify that user has necessary permissions on the device, 175 * or has superuser abilities 176 */ 177 accmode = VREAD; 178 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 179 if (error) 180 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 181 if (error) { 182 vput(devvp); 183 return (error); 184 } 185 186 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 187 error = iso_mountfs(devvp, mp); 188 if (error) 189 vrele(devvp); 190 } else { 191 if (devvp != imp->im_devvp) 192 error = EINVAL; /* needs translation */ 193 vput(devvp); 194 } 195 if (error) 196 return (error); 197 vfs_mountedfrom(mp, fspec); 198 return (0); 199 } 200 201 /* 202 * Common code for mount and mountroot 203 */ 204 static int 205 iso_mountfs(devvp, mp) 206 struct vnode *devvp; 207 struct mount *mp; 208 { 209 struct iso_mnt *isomp = NULL; 210 struct buf *bp = NULL; 211 struct buf *pribp = NULL, *supbp = NULL; 212 struct cdev *dev; 213 int error = EINVAL; 214 int high_sierra = 0; 215 int iso_bsize; 216 int iso_blknum; 217 int joliet_level; 218 struct iso_volume_descriptor *vdp = NULL; 219 struct iso_primary_descriptor *pri = NULL; 220 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 221 struct iso_supplementary_descriptor *sup = NULL; 222 struct iso_directory_record *rootp; 223 int logical_block_size, ssector; 224 struct g_consumer *cp; 225 struct bufobj *bo; 226 char *cs_local, *cs_disk; 227 228 dev = devvp->v_rdev; 229 dev_ref(dev); 230 g_topology_lock(); 231 error = g_vfs_open(devvp, &cp, "cd9660", 0); 232 g_topology_unlock(); 233 VOP_UNLOCK(devvp, 0); 234 if (error) 235 goto out; 236 if (devvp->v_rdev->si_iosize_max != 0) 237 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 238 if (mp->mnt_iosize_max > MAXPHYS) 239 mp->mnt_iosize_max = MAXPHYS; 240 241 bo = &devvp->v_bufobj; 242 243 /* This is the "logical sector size". The standard says this 244 * should be 2048 or the physical sector size on the device, 245 * whichever is greater. 246 */ 247 if ((ISO_DEFAULT_BLOCK_SIZE % cp->provider->sectorsize) != 0) { 248 error = EINVAL; 249 goto out; 250 } 251 252 iso_bsize = cp->provider->sectorsize; 253 254 joliet_level = 0; 255 if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector)) 256 ssector = 0; 257 for (iso_blknum = 16 + ssector; 258 iso_blknum < 100 + ssector; 259 iso_blknum++) { 260 if ((error = bread(devvp, iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE), 261 iso_bsize, NOCRED, &bp)) != 0) 262 goto out; 263 264 vdp = (struct iso_volume_descriptor *)bp->b_data; 265 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 266 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 267 sizeof vdp->id_sierra) != 0) { 268 error = EINVAL; 269 goto out; 270 } else 271 high_sierra = 1; 272 } 273 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 274 case ISO_VD_PRIMARY: 275 if (pribp == NULL) { 276 pribp = bp; 277 bp = NULL; 278 pri = (struct iso_primary_descriptor *)vdp; 279 pri_sierra = 280 (struct iso_sierra_primary_descriptor *)vdp; 281 } 282 break; 283 284 case ISO_VD_SUPPLEMENTARY: 285 if (supbp == NULL) { 286 supbp = bp; 287 bp = NULL; 288 sup = (struct iso_supplementary_descriptor *)vdp; 289 290 if (!vfs_flagopt(mp->mnt_optnew, "nojoliet", NULL, 0)) { 291 if (bcmp(sup->escape, "%/@", 3) == 0) 292 joliet_level = 1; 293 if (bcmp(sup->escape, "%/C", 3) == 0) 294 joliet_level = 2; 295 if (bcmp(sup->escape, "%/E", 3) == 0) 296 joliet_level = 3; 297 298 if ((isonum_711 (sup->flags) & 1) && 299 !vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0)) 300 joliet_level = 0; 301 } 302 } 303 break; 304 305 case ISO_VD_END: 306 goto vd_end; 307 308 default: 309 break; 310 } 311 if (bp != NULL) { 312 brelse(bp); 313 bp = NULL; 314 } 315 } 316 vd_end: 317 if (bp != NULL) { 318 brelse(bp); 319 bp = NULL; 320 } 321 322 if (pri == NULL) { 323 error = EINVAL; 324 goto out; 325 } 326 327 logical_block_size = 328 isonum_723 (high_sierra? 329 pri_sierra->logical_block_size: 330 pri->logical_block_size); 331 332 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 333 || (logical_block_size & (logical_block_size - 1)) != 0) { 334 error = EINVAL; 335 goto out; 336 } 337 338 rootp = (struct iso_directory_record *) 339 (high_sierra? 340 pri_sierra->root_directory_record: 341 pri->root_directory_record); 342 343 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 344 isomp->im_cp = cp; 345 isomp->im_bo = bo; 346 isomp->logical_block_size = logical_block_size; 347 isomp->volume_space_size = 348 isonum_733 (high_sierra? 349 pri_sierra->volume_space_size: 350 pri->volume_space_size); 351 isomp->joliet_level = 0; 352 /* 353 * Since an ISO9660 multi-session CD can also access previous 354 * sessions, we have to include them into the space consider- 355 * ations. This doesn't yield a very accurate number since 356 * parts of the old sessions might be inaccessible now, but we 357 * can't do much better. This is also important for the NFS 358 * filehandle validation. 359 */ 360 isomp->volume_space_size += ssector; 361 bcopy (rootp, isomp->root, sizeof isomp->root); 362 isomp->root_extent = isonum_733 (rootp->extent); 363 isomp->root_size = isonum_733 (rootp->size); 364 365 isomp->im_bmask = logical_block_size - 1; 366 isomp->im_bshift = ffs(logical_block_size) - 1; 367 368 pribp->b_flags |= B_AGE; 369 brelse(pribp); 370 pribp = NULL; 371 rootp = NULL; 372 pri = NULL; 373 pri_sierra = NULL; 374 375 mp->mnt_data = 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 MNT_ILOCK(mp); 380 mp->mnt_flag |= MNT_LOCAL; 381 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED; 382 MNT_IUNLOCK(mp); 383 isomp->im_mountp = mp; 384 isomp->im_dev = dev; 385 isomp->im_devvp = devvp; 386 387 vfs_flagopt(mp->mnt_optnew, "norrip", &isomp->im_flags, ISOFSMNT_NORRIP); 388 vfs_flagopt(mp->mnt_optnew, "gens", &isomp->im_flags, ISOFSMNT_GENS); 389 vfs_flagopt(mp->mnt_optnew, "extatt", &isomp->im_flags, ISOFSMNT_EXTATT); 390 vfs_flagopt(mp->mnt_optnew, "nojoliet", &isomp->im_flags, ISOFSMNT_NOJOLIET); 391 vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV); 392 393 /* Check the Rock Ridge Extension support */ 394 if (!(isomp->im_flags & ISOFSMNT_NORRIP)) { 395 if ((error = bread(isomp->im_devvp, (isomp->root_extent + 396 isonum_711(((struct iso_directory_record *)isomp->root)-> 397 ext_attr_length)) << (isomp->im_bshift - DEV_BSHIFT), 398 isomp->logical_block_size, NOCRED, &bp)) != 0) 399 goto out; 400 401 rootp = (struct iso_directory_record *)bp->b_data; 402 403 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 404 isomp->im_flags |= ISOFSMNT_NORRIP; 405 } else { 406 isomp->im_flags &= ~ISOFSMNT_GENS; 407 } 408 409 /* 410 * The contents are valid, 411 * but they will get reread as part of another vnode, so... 412 */ 413 bp->b_flags |= B_AGE; 414 brelse(bp); 415 bp = NULL; 416 rootp = NULL; 417 } 418 419 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 420 cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error); 421 if (error) 422 goto out; 423 cs_disk = vfs_getopts(mp->mnt_optnew, "cs_disk", &error); 424 if (error) 425 goto out; 426 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l); 427 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d); 428 } else { 429 isomp->im_d2l = NULL; 430 isomp->im_l2d = NULL; 431 } 432 433 if (high_sierra) { 434 /* this effectively ignores all the mount flags */ 435 if (bootverbose) 436 log(LOG_INFO, "cd9660: High Sierra Format\n"); 437 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 438 } else 439 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 440 default: 441 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 442 break; 443 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 444 isomp->iso_ftype = ISO_FTYPE_9660; 445 break; 446 case 0: 447 if (bootverbose) 448 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 449 isomp->iso_ftype = ISO_FTYPE_RRIP; 450 break; 451 } 452 453 /* Decide whether to use the Joliet descriptor */ 454 455 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 456 if (bootverbose) 457 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", 458 joliet_level); 459 rootp = (struct iso_directory_record *) 460 sup->root_directory_record; 461 bcopy (rootp, isomp->root, sizeof isomp->root); 462 isomp->root_extent = isonum_733 (rootp->extent); 463 isomp->root_size = isonum_733 (rootp->size); 464 isomp->joliet_level = joliet_level; 465 supbp->b_flags |= B_AGE; 466 } 467 468 if (supbp) { 469 brelse(supbp); 470 supbp = NULL; 471 sup = NULL; 472 } 473 474 return 0; 475 out: 476 if (bp != NULL) 477 brelse(bp); 478 if (pribp != NULL) 479 brelse(pribp); 480 if (supbp != NULL) 481 brelse(supbp); 482 if (cp != NULL) { 483 g_topology_lock(); 484 g_vfs_close(cp); 485 g_topology_unlock(); 486 } 487 if (isomp) { 488 free(isomp, M_ISOFSMNT); 489 mp->mnt_data = NULL; 490 } 491 dev_rel(dev); 492 return error; 493 } 494 495 /* 496 * unmount system call 497 */ 498 static int 499 cd9660_unmount(mp, mntflags) 500 struct mount *mp; 501 int mntflags; 502 { 503 struct iso_mnt *isomp; 504 int error, flags = 0; 505 506 if (mntflags & MNT_FORCE) 507 flags |= FORCECLOSE; 508 if ((error = vflush(mp, 0, flags, curthread))) 509 return (error); 510 511 isomp = VFSTOISOFS(mp); 512 513 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 514 if (isomp->im_d2l) 515 cd9660_iconv->close(isomp->im_d2l); 516 if (isomp->im_l2d) 517 cd9660_iconv->close(isomp->im_l2d); 518 } 519 g_topology_lock(); 520 g_vfs_close(isomp->im_cp); 521 g_topology_unlock(); 522 vrele(isomp->im_devvp); 523 dev_rel(isomp->im_dev); 524 free(isomp, M_ISOFSMNT); 525 mp->mnt_data = NULL; 526 MNT_ILOCK(mp); 527 mp->mnt_flag &= ~MNT_LOCAL; 528 MNT_IUNLOCK(mp); 529 return (error); 530 } 531 532 /* 533 * Return root of a filesystem 534 */ 535 static int 536 cd9660_root(mp, flags, vpp) 537 struct mount *mp; 538 int flags; 539 struct vnode **vpp; 540 { 541 struct iso_mnt *imp = VFSTOISOFS(mp); 542 struct iso_directory_record *dp = 543 (struct iso_directory_record *)imp->root; 544 cd_ino_t ino = isodirino(dp, imp); 545 546 /* 547 * With RRIP we must use the `.' entry of the root directory. 548 * Simply tell vget, that it's a relocated directory. 549 */ 550 return (cd9660_vget_internal(mp, ino, flags, vpp, 551 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 552 } 553 554 /* 555 * Get filesystem statistics. 556 */ 557 static int 558 cd9660_statfs(mp, sbp) 559 struct mount *mp; 560 struct statfs *sbp; 561 { 562 struct iso_mnt *isomp; 563 564 isomp = VFSTOISOFS(mp); 565 566 sbp->f_bsize = isomp->logical_block_size; 567 sbp->f_iosize = sbp->f_bsize; /* XXX */ 568 sbp->f_blocks = isomp->volume_space_size; 569 sbp->f_bfree = 0; /* total free blocks */ 570 sbp->f_bavail = 0; /* blocks free for non superuser */ 571 sbp->f_files = 0; /* total files */ 572 sbp->f_ffree = 0; /* free file nodes */ 573 return 0; 574 } 575 576 /* 577 * File handle to vnode 578 * 579 * Have to be really careful about stale file handles: 580 * - check that the inode number is in range 581 * - call iget() to get the locked inode 582 * - check for an unallocated inode (i_mode == 0) 583 * - check that the generation number matches 584 */ 585 586 /* ARGSUSED */ 587 static int 588 cd9660_fhtovp(mp, fhp, flags, vpp) 589 struct mount *mp; 590 struct fid *fhp; 591 int flags; 592 struct vnode **vpp; 593 { 594 struct ifid ifh; 595 struct iso_node *ip; 596 struct vnode *nvp; 597 int error; 598 599 memcpy(&ifh, fhp, sizeof(ifh)); 600 601 #ifdef ISOFS_DBG 602 printf("fhtovp: ino %d, start %ld\n", 603 ifh.ifid_ino, ifh.ifid_start); 604 #endif 605 606 if ((error = VFS_VGET(mp, ifh.ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 607 *vpp = NULLVP; 608 return (error); 609 } 610 ip = VTOI(nvp); 611 if (ip->inode.iso_mode == 0) { 612 vput(nvp); 613 *vpp = NULLVP; 614 return (ESTALE); 615 } 616 *vpp = nvp; 617 vnode_create_vobject(*vpp, ip->i_size, curthread); 618 return (0); 619 } 620 621 /* 622 * Conform to standard VFS interface; can't vget arbitrary inodes beyond 4GB 623 * into media with current inode scheme and 32-bit ino_t. This shouldn't be 624 * needed for anything other than nfsd, and who exports a mounted DVD over NFS? 625 */ 626 static int 627 cd9660_vget(mp, ino, flags, vpp) 628 struct mount *mp; 629 ino_t ino; 630 int flags; 631 struct vnode **vpp; 632 { 633 634 /* 635 * XXXX 636 * It would be nice if we didn't always set the `relocated' flag 637 * and force the extra read, but I don't want to think about fixing 638 * that right now. 639 */ 640 return (cd9660_vget_internal(mp, ino, flags, vpp, 641 #if 0 642 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 643 #else 644 0, 645 #endif 646 (struct iso_directory_record *)0)); 647 } 648 649 /* Use special comparator for full 64-bit ino comparison. */ 650 static int 651 cd9660_vfs_hash_cmp(vp, pino) 652 struct vnode *vp; 653 void *pino; 654 { 655 struct iso_node *ip; 656 cd_ino_t ino; 657 658 ip = VTOI(vp); 659 ino = *(cd_ino_t *)pino; 660 return (ip->i_number != ino); 661 } 662 663 int 664 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir) 665 struct mount *mp; 666 cd_ino_t ino; 667 int flags; 668 struct vnode **vpp; 669 int relocated; 670 struct iso_directory_record *isodir; 671 { 672 struct iso_mnt *imp; 673 struct iso_node *ip; 674 struct buf *bp; 675 struct vnode *vp; 676 struct cdev *dev; 677 int error; 678 struct thread *td; 679 680 td = curthread; 681 error = vfs_hash_get(mp, ino, flags, td, vpp, cd9660_vfs_hash_cmp, 682 &ino); 683 if (error || *vpp != NULL) 684 return (error); 685 686 /* 687 * We must promote to an exclusive lock for vnode creation. This 688 * can happen if lookup is passed LOCKSHARED. 689 */ 690 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 691 flags &= ~LK_TYPE_MASK; 692 flags |= LK_EXCLUSIVE; 693 } 694 695 /* 696 * We do not lock vnode creation as it is believed to be too 697 * expensive for such rare case as simultaneous creation of vnode 698 * for same ino by different processes. We just allow them to race 699 * and check later to decide who wins. Let the race begin! 700 */ 701 702 imp = VFSTOISOFS(mp); 703 dev = imp->im_dev; 704 705 /* Allocate a new vnode/iso_node. */ 706 if ((error = getnewvnode("isofs", mp, &cd9660_vnodeops, &vp)) != 0) { 707 *vpp = NULLVP; 708 return (error); 709 } 710 ip = malloc(sizeof(struct iso_node), M_ISOFSNODE, 711 M_WAITOK | M_ZERO); 712 vp->v_data = ip; 713 ip->i_vnode = vp; 714 ip->i_number = ino; 715 716 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 717 error = insmntque(vp, mp); 718 if (error != 0) { 719 free(ip, M_ISOFSNODE); 720 *vpp = NULLVP; 721 return (error); 722 } 723 error = vfs_hash_insert(vp, ino, flags, td, vpp, cd9660_vfs_hash_cmp, 724 &ino); 725 if (error || *vpp != NULL) 726 return (error); 727 728 if (isodir == NULL) { 729 int lbn, off; 730 731 lbn = lblkno(imp, ino); 732 if (lbn >= imp->volume_space_size) { 733 vput(vp); 734 printf("fhtovp: lbn exceed volume space %d\n", lbn); 735 return (ESTALE); 736 } 737 738 off = blkoff(imp, ino); 739 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 740 vput(vp); 741 printf("fhtovp: crosses block boundary %d\n", 742 off + ISO_DIRECTORY_RECORD_SIZE); 743 return (ESTALE); 744 } 745 746 error = bread(imp->im_devvp, 747 lbn << (imp->im_bshift - DEV_BSHIFT), 748 imp->logical_block_size, NOCRED, &bp); 749 if (error) { 750 vput(vp); 751 brelse(bp); 752 printf("fhtovp: bread error %d\n",error); 753 return (error); 754 } 755 isodir = (struct iso_directory_record *)(bp->b_data + off); 756 757 if (off + isonum_711(isodir->length) > 758 imp->logical_block_size) { 759 vput(vp); 760 brelse(bp); 761 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 762 off +isonum_711(isodir->length), off, 763 isonum_711(isodir->length)); 764 return (ESTALE); 765 } 766 767 #if 0 768 if (isonum_733(isodir->extent) + 769 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 770 brelse(bp); 771 printf("fhtovp: file start miss %d vs %d\n", 772 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 773 ifhp->ifid_start); 774 return (ESTALE); 775 } 776 #endif 777 } else 778 bp = NULL; 779 780 ip->i_mnt = imp; 781 782 if (relocated) { 783 /* 784 * On relocated directories we must 785 * read the `.' entry out of a dir. 786 */ 787 ip->iso_start = ino >> imp->im_bshift; 788 if (bp != NULL) 789 brelse(bp); 790 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 791 vput(vp); 792 return (error); 793 } 794 isodir = (struct iso_directory_record *)bp->b_data; 795 } 796 797 ip->iso_extent = isonum_733(isodir->extent); 798 ip->i_size = isonum_733(isodir->size); 799 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 800 801 /* 802 * Setup time stamp, attribute 803 */ 804 vp->v_type = VNON; 805 switch (imp->iso_ftype) { 806 default: /* ISO_FTYPE_9660 */ 807 { 808 struct buf *bp2; 809 int off; 810 if ((imp->im_flags & ISOFSMNT_EXTATT) 811 && (off = isonum_711(isodir->ext_attr_length))) 812 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 813 &bp2); 814 else 815 bp2 = NULL; 816 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 817 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 818 if (bp2) 819 brelse(bp2); 820 break; 821 } 822 case ISO_FTYPE_RRIP: 823 cd9660_rrip_analyze(isodir, ip, imp); 824 break; 825 } 826 827 brelse(bp); 828 829 /* 830 * Initialize the associated vnode 831 */ 832 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 833 case VFIFO: 834 vp->v_op = &cd9660_fifoops; 835 break; 836 default: 837 VN_LOCK_ASHARE(vp); 838 break; 839 } 840 841 if (ip->iso_extent == imp->root_extent) 842 vp->v_vflag |= VV_ROOT; 843 844 /* 845 * XXX need generation number? 846 */ 847 848 *vpp = vp; 849 return (0); 850 } 851