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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 39 * $FreeBSD$ 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/namei.h> 45 #include <sys/proc.h> 46 #include <sys/kernel.h> 47 #include <sys/vnode.h> 48 #include <sys/mount.h> 49 #include <sys/bio.h> 50 #include <sys/buf.h> 51 #include <sys/cdio.h> 52 #include <sys/conf.h> 53 #include <sys/fcntl.h> 54 #include <sys/malloc.h> 55 #include <sys/stat.h> 56 #include <sys/syslog.h> 57 58 59 #include <isofs/cd9660/iso.h> 60 #include <isofs/cd9660/iso_rrip.h> 61 #include <isofs/cd9660/cd9660_node.h> 62 #include <isofs/cd9660/cd9660_mount.h> 63 64 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 65 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part"); 66 67 static vfs_mount_t cd9660_mount; 68 static vfs_unmount_t cd9660_unmount; 69 static vfs_root_t cd9660_root; 70 static vfs_statfs_t cd9660_statfs; 71 static vfs_vget_t cd9660_vget; 72 static vfs_fhtovp_t cd9660_fhtovp; 73 static vfs_vptofh_t cd9660_vptofh; 74 75 static struct vfsops cd9660_vfsops = { 76 cd9660_mount, 77 vfs_stdstart, 78 cd9660_unmount, 79 cd9660_root, 80 vfs_stdquotactl, 81 cd9660_statfs, 82 vfs_stdsync, 83 cd9660_vget, 84 cd9660_fhtovp, 85 vfs_stdcheckexp, 86 cd9660_vptofh, 87 cd9660_init, 88 cd9660_uninit, 89 vfs_stdextattrctl, 90 }; 91 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 92 MODULE_VERSION(cd9660, 1); 93 94 95 /* 96 * Called by vfs_mountroot when iso is going to be mounted as root. 97 */ 98 99 static int iso_get_ssector(dev_t dev, struct thread *td); 100 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 101 struct thread *td, struct iso_args *argp); 102 103 /* 104 * Try to find the start of the last data track on this CD-ROM. This 105 * is used to mount the last session of a multi-session CD. Bail out 106 * and return 0 if we fail, this is always a safe bet. 107 */ 108 static int 109 iso_get_ssector(dev, td) 110 dev_t dev; 111 struct thread *td; 112 { 113 struct ioc_toc_header h; 114 struct ioc_read_toc_single_entry t; 115 int i; 116 struct cdevsw *bd; 117 d_ioctl_t *ioctlp; 118 119 bd = devsw(dev); 120 ioctlp = bd->d_ioctl; 121 if (ioctlp == NULL) 122 return 0; 123 124 if (ioctlp(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0) 125 return 0; 126 127 for (i = h.ending_track; i >= 0; i--) { 128 t.address_format = CD_LBA_FORMAT; 129 t.track = i; 130 if (ioctlp(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) 131 return 0; 132 if ((t.entry.control & 4) != 0) 133 /* found a data track */ 134 break; 135 } 136 137 if (i < 0) 138 return 0; 139 140 return ntohl(t.entry.addr.lba); 141 } 142 143 static int iso_mountroot(struct mount *mp, struct thread *td); 144 145 static int 146 iso_mountroot(mp, td) 147 struct mount *mp; 148 struct thread *td; 149 { 150 struct iso_args args; 151 int error; 152 153 if ((error = bdevvp(rootdev, &rootvp))) { 154 printf("iso_mountroot: can't find rootvp\n"); 155 return (error); 156 } 157 args.flags = ISOFSMNT_ROOT; 158 159 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td); 160 error = VOP_OPEN(rootvp, FREAD, FSCRED, td); 161 VOP_UNLOCK(rootvp, 0, td); 162 if (error) 163 return error; 164 165 args.ssector = iso_get_ssector(rootdev, td); 166 167 (void)VOP_CLOSE(rootvp, FREAD, NOCRED, td); 168 169 if (bootverbose) 170 printf("iso_mountroot(): using session at block %d\n", 171 args.ssector); 172 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0) 173 return (error); 174 175 (void)cd9660_statfs(mp, &mp->mnt_stat, td); 176 return (0); 177 } 178 179 /* 180 * VFS Operations. 181 * 182 * mount system call 183 */ 184 static int 185 cd9660_mount(mp, path, data, ndp, td) 186 register struct mount *mp; 187 char *path; 188 caddr_t data; 189 struct nameidata *ndp; 190 struct thread *td; 191 { 192 struct vnode *devvp; 193 struct iso_args args; 194 size_t size; 195 int error; 196 mode_t accessmode; 197 struct iso_mnt *imp = 0; 198 199 if ((mp->mnt_flag & MNT_ROOTFS) != 0) { 200 return (iso_mountroot(mp, td)); 201 } 202 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 203 return (error); 204 205 if ((mp->mnt_flag & MNT_RDONLY) == 0) 206 return (EROFS); 207 208 /* 209 * If updating, check whether changing from read-only to 210 * read/write; if there is no device name, that's all we do. 211 */ 212 if (mp->mnt_flag & MNT_UPDATE) { 213 imp = VFSTOISOFS(mp); 214 if (args.fspec == 0) 215 return (vfs_export(mp, &args.export)); 216 } 217 /* 218 * Not an update, or updating the name: look up the name 219 * and verify that it refers to a sensible block device. 220 */ 221 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td); 222 if ((error = namei(ndp))) 223 return (error); 224 NDFREE(ndp, NDF_ONLY_PNBUF); 225 devvp = ndp->ni_vp; 226 227 if (!vn_isdisk(devvp, &error)) { 228 vrele(devvp); 229 return (error); 230 } 231 232 /* 233 * Verify that user has necessary permissions on the device, 234 * or has superuser abilities 235 */ 236 accessmode = VREAD; 237 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 238 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td); 239 if (error) 240 error = suser(td); 241 if (error) { 242 vput(devvp); 243 return (error); 244 } 245 VOP_UNLOCK(devvp, 0, td); 246 247 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 248 error = iso_mountfs(devvp, mp, td, &args); 249 } else { 250 if (devvp != imp->im_devvp) 251 error = EINVAL; /* needs translation */ 252 else 253 vrele(devvp); 254 } 255 if (error) { 256 vrele(devvp); 257 return error; 258 } 259 imp = VFSTOISOFS(mp); 260 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 261 &size); 262 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 263 (void) cd9660_statfs(mp, &mp->mnt_stat, td); 264 return 0; 265 } 266 267 /* 268 * Common code for mount and mountroot 269 */ 270 static int 271 iso_mountfs(devvp, mp, td, argp) 272 register struct vnode *devvp; 273 struct mount *mp; 274 struct thread *td; 275 struct iso_args *argp; 276 { 277 register struct iso_mnt *isomp = (struct iso_mnt *)0; 278 struct buf *bp = NULL; 279 struct buf *pribp = NULL, *supbp = NULL; 280 dev_t dev = devvp->v_rdev; 281 int error = EINVAL; 282 int needclose = 0; 283 int high_sierra = 0; 284 int iso_bsize; 285 int iso_blknum; 286 int joliet_level; 287 struct iso_volume_descriptor *vdp = 0; 288 struct iso_primary_descriptor *pri = NULL; 289 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 290 struct iso_supplementary_descriptor *sup = NULL; 291 struct iso_directory_record *rootp; 292 int logical_block_size; 293 294 if (!(mp->mnt_flag & MNT_RDONLY)) 295 return EROFS; 296 297 /* 298 * Disallow multiple mounts of the same device. 299 * Disallow mounting of a device that is currently in use 300 * (except for root, which might share swap device for miniroot). 301 * Flush out any old buffers remaining from a previous use. 302 */ 303 if ((error = vfs_mountedon(devvp))) 304 return error; 305 if (vcount(devvp) > 1 && devvp != rootvp) 306 return EBUSY; 307 if ((error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0))) 308 return (error); 309 310 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 311 error = VOP_OPEN(devvp, FREAD, FSCRED, td); 312 VOP_UNLOCK(devvp, 0, td); 313 if (error) 314 return error; 315 if (devvp->v_rdev->si_iosize_max != 0) 316 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 317 if (mp->mnt_iosize_max > MAXPHYS) 318 mp->mnt_iosize_max = MAXPHYS; 319 320 needclose = 1; 321 322 /* This is the "logical sector size". The standard says this 323 * should be 2048 or the physical sector size on the device, 324 * whichever is greater. For now, we'll just use a constant. 325 */ 326 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 327 328 joliet_level = 0; 329 for (iso_blknum = 16 + argp->ssector; 330 iso_blknum < 100 + argp->ssector; 331 iso_blknum++) { 332 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 333 iso_bsize, NOCRED, &bp)) != 0) 334 goto out; 335 336 vdp = (struct iso_volume_descriptor *)bp->b_data; 337 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 338 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 339 sizeof vdp->id) != 0) { 340 error = EINVAL; 341 goto out; 342 } else 343 high_sierra = 1; 344 } 345 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 346 case ISO_VD_PRIMARY: 347 if (pribp == NULL) { 348 pribp = bp; 349 bp = NULL; 350 pri = (struct iso_primary_descriptor *)vdp; 351 pri_sierra = 352 (struct iso_sierra_primary_descriptor *)vdp; 353 } 354 break; 355 356 case ISO_VD_SUPPLEMENTARY: 357 if (supbp == NULL) { 358 supbp = bp; 359 bp = NULL; 360 sup = (struct iso_supplementary_descriptor *)vdp; 361 362 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 363 if (bcmp(sup->escape, "%/@", 3) == 0) 364 joliet_level = 1; 365 if (bcmp(sup->escape, "%/C", 3) == 0) 366 joliet_level = 2; 367 if (bcmp(sup->escape, "%/E", 3) == 0) 368 joliet_level = 3; 369 370 if ((isonum_711 (sup->flags) & 1) && 371 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 372 joliet_level = 0; 373 } 374 } 375 break; 376 377 case ISO_VD_END: 378 goto vd_end; 379 380 default: 381 break; 382 } 383 if (bp) { 384 brelse(bp); 385 bp = NULL; 386 } 387 } 388 vd_end: 389 if (bp) { 390 brelse(bp); 391 bp = NULL; 392 } 393 394 if (pri == NULL) { 395 error = EINVAL; 396 goto out; 397 } 398 399 logical_block_size = 400 isonum_723 (high_sierra? 401 pri_sierra->logical_block_size: 402 pri->logical_block_size); 403 404 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 405 || (logical_block_size & (logical_block_size - 1)) != 0) { 406 error = EINVAL; 407 goto out; 408 } 409 410 rootp = (struct iso_directory_record *) 411 (high_sierra? 412 pri_sierra->root_directory_record: 413 pri->root_directory_record); 414 415 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 416 isomp->logical_block_size = logical_block_size; 417 isomp->volume_space_size = 418 isonum_733 (high_sierra? 419 pri_sierra->volume_space_size: 420 pri->volume_space_size); 421 isomp->joliet_level = 0; 422 /* 423 * Since an ISO9660 multi-session CD can also access previous 424 * sessions, we have to include them into the space consider- 425 * ations. This doesn't yield a very accurate number since 426 * parts of the old sessions might be inaccessible now, but we 427 * can't do much better. This is also important for the NFS 428 * filehandle validation. 429 */ 430 isomp->volume_space_size += argp->ssector; 431 bcopy (rootp, isomp->root, sizeof isomp->root); 432 isomp->root_extent = isonum_733 (rootp->extent); 433 isomp->root_size = isonum_733 (rootp->size); 434 435 isomp->im_bmask = logical_block_size - 1; 436 isomp->im_bshift = ffs(logical_block_size) - 1; 437 438 pribp->b_flags |= B_AGE; 439 brelse(pribp); 440 pribp = NULL; 441 442 mp->mnt_data = (qaddr_t)isomp; 443 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 444 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 445 mp->mnt_maxsymlinklen = 0; 446 mp->mnt_flag |= MNT_LOCAL; 447 isomp->im_mountp = mp; 448 isomp->im_dev = dev; 449 isomp->im_devvp = devvp; 450 451 devvp->v_rdev->si_mountpoint = mp; 452 453 /* Check the Rock Ridge Extention support */ 454 if (!(argp->flags & ISOFSMNT_NORRIP)) { 455 if ((error = bread(isomp->im_devvp, 456 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 457 (isomp->im_bshift - DEV_BSHIFT), 458 isomp->logical_block_size, NOCRED, &bp)) != 0) 459 goto out; 460 461 rootp = (struct iso_directory_record *)bp->b_data; 462 463 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 464 argp->flags |= ISOFSMNT_NORRIP; 465 } else { 466 argp->flags &= ~ISOFSMNT_GENS; 467 } 468 469 /* 470 * The contents are valid, 471 * but they will get reread as part of another vnode, so... 472 */ 473 bp->b_flags |= B_AGE; 474 brelse(bp); 475 bp = NULL; 476 } 477 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 478 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 479 480 if (high_sierra) { 481 /* this effectively ignores all the mount flags */ 482 log(LOG_INFO, "cd9660: High Sierra Format\n"); 483 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 484 } else 485 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 486 default: 487 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 488 break; 489 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 490 isomp->iso_ftype = ISO_FTYPE_9660; 491 break; 492 case 0: 493 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 494 isomp->iso_ftype = ISO_FTYPE_RRIP; 495 break; 496 } 497 498 /* Decide whether to use the Joliet descriptor */ 499 500 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 501 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 502 rootp = (struct iso_directory_record *) 503 sup->root_directory_record; 504 bcopy (rootp, isomp->root, sizeof isomp->root); 505 isomp->root_extent = isonum_733 (rootp->extent); 506 isomp->root_size = isonum_733 (rootp->size); 507 isomp->joliet_level = joliet_level; 508 supbp->b_flags |= B_AGE; 509 } 510 511 if (supbp) { 512 brelse(supbp); 513 supbp = NULL; 514 } 515 516 return 0; 517 out: 518 devvp->v_rdev->si_mountpoint = NULL; 519 if (bp) 520 brelse(bp); 521 if (pribp) 522 brelse(pribp); 523 if (supbp) 524 brelse(supbp); 525 if (needclose) 526 (void)VOP_CLOSE(devvp, FREAD, NOCRED, td); 527 if (isomp) { 528 free((caddr_t)isomp, M_ISOFSMNT); 529 mp->mnt_data = (qaddr_t)0; 530 } 531 return error; 532 } 533 534 /* 535 * unmount system call 536 */ 537 static int 538 cd9660_unmount(mp, mntflags, td) 539 struct mount *mp; 540 int mntflags; 541 struct thread *td; 542 { 543 register struct iso_mnt *isomp; 544 int error, flags = 0; 545 546 if (mntflags & MNT_FORCE) 547 flags |= FORCECLOSE; 548 #if 0 549 mntflushbuf(mp, 0); 550 if (mntinvalbuf(mp)) 551 return EBUSY; 552 #endif 553 if ((error = vflush(mp, 0, flags))) 554 return (error); 555 556 isomp = VFSTOISOFS(mp); 557 558 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 559 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, td); 560 vrele(isomp->im_devvp); 561 free((caddr_t)isomp, M_ISOFSMNT); 562 mp->mnt_data = (qaddr_t)0; 563 mp->mnt_flag &= ~MNT_LOCAL; 564 return (error); 565 } 566 567 /* 568 * Return root of a filesystem 569 */ 570 static int 571 cd9660_root(mp, vpp) 572 struct mount *mp; 573 struct vnode **vpp; 574 { 575 struct iso_mnt *imp = VFSTOISOFS(mp); 576 struct iso_directory_record *dp = 577 (struct iso_directory_record *)imp->root; 578 ino_t ino = isodirino(dp, imp); 579 580 /* 581 * With RRIP we must use the `.' entry of the root directory. 582 * Simply tell vget, that it's a relocated directory. 583 */ 584 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp, 585 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 586 } 587 588 /* 589 * Get filesystem statistics. 590 */ 591 static int 592 cd9660_statfs(mp, sbp, td) 593 struct mount *mp; 594 register struct statfs *sbp; 595 struct thread *td; 596 { 597 register struct iso_mnt *isomp; 598 599 isomp = VFSTOISOFS(mp); 600 601 sbp->f_bsize = isomp->logical_block_size; 602 sbp->f_iosize = sbp->f_bsize; /* XXX */ 603 sbp->f_blocks = isomp->volume_space_size; 604 sbp->f_bfree = 0; /* total free blocks */ 605 sbp->f_bavail = 0; /* blocks free for non superuser */ 606 sbp->f_files = 0; /* total files */ 607 sbp->f_ffree = 0; /* free file nodes */ 608 if (sbp != &mp->mnt_stat) { 609 sbp->f_type = mp->mnt_vfc->vfc_typenum; 610 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 611 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 612 } 613 return 0; 614 } 615 616 /* 617 * File handle to vnode 618 * 619 * Have to be really careful about stale file handles: 620 * - check that the inode number is in range 621 * - call iget() to get the locked inode 622 * - check for an unallocated inode (i_mode == 0) 623 * - check that the generation number matches 624 */ 625 626 struct ifid { 627 ushort ifid_len; 628 ushort ifid_pad; 629 int ifid_ino; 630 long ifid_start; 631 }; 632 633 /* ARGSUSED */ 634 static int 635 cd9660_fhtovp(mp, fhp, vpp) 636 register struct mount *mp; 637 struct fid *fhp; 638 struct vnode **vpp; 639 { 640 struct ifid *ifhp = (struct ifid *)fhp; 641 register struct iso_node *ip; 642 struct vnode *nvp; 643 int error; 644 645 #ifdef ISOFS_DBG 646 printf("fhtovp: ino %d, start %ld\n", 647 ifhp->ifid_ino, ifhp->ifid_start); 648 #endif 649 650 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 651 *vpp = NULLVP; 652 return (error); 653 } 654 ip = VTOI(nvp); 655 if (ip->inode.iso_mode == 0) { 656 vput(nvp); 657 *vpp = NULLVP; 658 return (ESTALE); 659 } 660 *vpp = nvp; 661 return (0); 662 } 663 664 static int 665 cd9660_vget(mp, ino, flags, vpp) 666 struct mount *mp; 667 ino_t ino; 668 int flags; 669 struct vnode **vpp; 670 { 671 672 /* 673 * XXXX 674 * It would be nice if we didn't always set the `relocated' flag 675 * and force the extra read, but I don't want to think about fixing 676 * that right now. 677 */ 678 return (cd9660_vget_internal(mp, ino, flags, vpp, 679 #if 0 680 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 681 #else 682 0, 683 #endif 684 (struct iso_directory_record *)0)); 685 } 686 687 int 688 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir) 689 struct mount *mp; 690 ino_t ino; 691 int flags; 692 struct vnode **vpp; 693 int relocated; 694 struct iso_directory_record *isodir; 695 { 696 struct iso_mnt *imp; 697 struct iso_node *ip; 698 struct buf *bp; 699 struct vnode *vp; 700 dev_t dev; 701 int error; 702 703 imp = VFSTOISOFS(mp); 704 dev = imp->im_dev; 705 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0) 706 return (error); 707 if (*vpp != NULL) 708 return (0); 709 710 /* Allocate a new vnode/iso_node. */ 711 if ((error = getnewvnode("isofs", mp, cd9660_vnodeop_p, &vp)) != 0) { 712 *vpp = NULLVP; 713 return (error); 714 } 715 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 716 M_WAITOK | M_ZERO); 717 vp->v_data = ip; 718 ip->i_vnode = vp; 719 ip->i_dev = dev; 720 ip->i_number = ino; 721 722 /* 723 * Check to be sure that it did not show up. We have to put it 724 * on the hash chain as the cleanup from vput expects to find 725 * it there. 726 */ 727 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0 || 728 *vpp != NULL) { 729 cd9660_ihashins(ip); 730 vput(vp); 731 return (error); 732 } 733 734 /* 735 * Put it onto its hash chain and lock it so that other requests for 736 * this inode will block if they arrive while we are sleeping waiting 737 * for old data structures to be purged or for the contents of the 738 * disk portion of this inode to be read. 739 */ 740 cd9660_ihashins(ip); 741 742 if (isodir == 0) { 743 int lbn, off; 744 745 lbn = lblkno(imp, ino); 746 if (lbn >= imp->volume_space_size) { 747 vput(vp); 748 printf("fhtovp: lbn exceed volume space %d\n", lbn); 749 return (ESTALE); 750 } 751 752 off = blkoff(imp, ino); 753 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 754 vput(vp); 755 printf("fhtovp: crosses block boundary %d\n", 756 off + ISO_DIRECTORY_RECORD_SIZE); 757 return (ESTALE); 758 } 759 760 error = bread(imp->im_devvp, 761 lbn << (imp->im_bshift - DEV_BSHIFT), 762 imp->logical_block_size, NOCRED, &bp); 763 if (error) { 764 vput(vp); 765 brelse(bp); 766 printf("fhtovp: bread error %d\n",error); 767 return (error); 768 } 769 isodir = (struct iso_directory_record *)(bp->b_data + off); 770 771 if (off + isonum_711(isodir->length) > 772 imp->logical_block_size) { 773 vput(vp); 774 if (bp != 0) 775 brelse(bp); 776 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 777 off +isonum_711(isodir->length), off, 778 isonum_711(isodir->length)); 779 return (ESTALE); 780 } 781 782 #if 0 783 if (isonum_733(isodir->extent) + 784 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 785 if (bp != 0) 786 brelse(bp); 787 printf("fhtovp: file start miss %d vs %d\n", 788 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 789 ifhp->ifid_start); 790 return (ESTALE); 791 } 792 #endif 793 } else 794 bp = 0; 795 796 ip->i_mnt = imp; 797 ip->i_devvp = imp->im_devvp; 798 VREF(ip->i_devvp); 799 800 if (relocated) { 801 /* 802 * On relocated directories we must 803 * read the `.' entry out of a dir. 804 */ 805 ip->iso_start = ino >> imp->im_bshift; 806 if (bp != 0) 807 brelse(bp); 808 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 809 vput(vp); 810 return (error); 811 } 812 isodir = (struct iso_directory_record *)bp->b_data; 813 } 814 815 ip->iso_extent = isonum_733(isodir->extent); 816 ip->i_size = isonum_733(isodir->size); 817 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 818 819 /* 820 * Setup time stamp, attribute 821 */ 822 vp->v_type = VNON; 823 switch (imp->iso_ftype) { 824 default: /* ISO_FTYPE_9660 */ 825 { 826 struct buf *bp2; 827 int off; 828 if ((imp->im_flags & ISOFSMNT_EXTATT) 829 && (off = isonum_711(isodir->ext_attr_length))) 830 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 831 &bp2); 832 else 833 bp2 = NULL; 834 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 835 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 836 if (bp2) 837 brelse(bp2); 838 break; 839 } 840 case ISO_FTYPE_RRIP: 841 cd9660_rrip_analyze(isodir, ip, imp); 842 break; 843 } 844 845 if (bp != 0) 846 brelse(bp); 847 848 /* 849 * Initialize the associated vnode 850 */ 851 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 852 case VFIFO: 853 vp->v_op = cd9660_fifoop_p; 854 break; 855 case VCHR: 856 case VBLK: 857 vp->v_op = cd9660_specop_p; 858 vp = addaliasu(vp, ip->inode.iso_rdev); 859 ip->i_vnode = vp; 860 break; 861 default: 862 break; 863 } 864 865 if (ip->iso_extent == imp->root_extent) 866 vp->v_vflag |= VV_ROOT; 867 868 /* 869 * XXX need generation number? 870 */ 871 872 *vpp = vp; 873 return (0); 874 } 875 876 /* 877 * Vnode pointer to File handle 878 */ 879 /* ARGSUSED */ 880 static int 881 cd9660_vptofh(vp, fhp) 882 struct vnode *vp; 883 struct fid *fhp; 884 { 885 register struct iso_node *ip = VTOI(vp); 886 register struct ifid *ifhp; 887 888 ifhp = (struct ifid *)fhp; 889 ifhp->ifid_len = sizeof(struct ifid); 890 891 ifhp->ifid_ino = ip->i_number; 892 ifhp->ifid_start = ip->iso_start; 893 894 #ifdef ISOFS_DBG 895 printf("vptofh: ino %d, start %ld\n", 896 ifhp->ifid_ino,ifhp->ifid_start); 897 #endif 898 return 0; 899 } 900