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 (path == NULL) /* We are doing the initial root mount */ 200 return (iso_mountroot(mp, td)); 201 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 202 return (error); 203 204 if ((mp->mnt_flag & MNT_RDONLY) == 0) 205 return (EROFS); 206 207 /* 208 * If updating, check whether changing from read-only to 209 * read/write; if there is no device name, that's all we do. 210 */ 211 if (mp->mnt_flag & MNT_UPDATE) { 212 imp = VFSTOISOFS(mp); 213 if (args.fspec == 0) 214 return (vfs_export(mp, &args.export)); 215 } 216 /* 217 * Not an update, or updating the name: look up the name 218 * and verify that it refers to a sensible block device. 219 */ 220 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td); 221 if ((error = namei(ndp))) 222 return (error); 223 NDFREE(ndp, NDF_ONLY_PNBUF); 224 devvp = ndp->ni_vp; 225 226 if (!vn_isdisk(devvp, &error)) { 227 vrele(devvp); 228 return (error); 229 } 230 231 /* 232 * Verify that user has necessary permissions on the device, 233 * or has superuser abilities 234 */ 235 accessmode = VREAD; 236 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 237 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td); 238 if (error) 239 error = suser(td); 240 if (error) { 241 vput(devvp); 242 return (error); 243 } 244 VOP_UNLOCK(devvp, 0, td); 245 246 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 247 error = iso_mountfs(devvp, mp, td, &args); 248 } else { 249 if (devvp != imp->im_devvp) 250 error = EINVAL; /* needs translation */ 251 else 252 vrele(devvp); 253 } 254 if (error) { 255 vrele(devvp); 256 return error; 257 } 258 imp = VFSTOISOFS(mp); 259 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 260 &size); 261 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 262 (void) cd9660_statfs(mp, &mp->mnt_stat, td); 263 return 0; 264 } 265 266 /* 267 * Common code for mount and mountroot 268 */ 269 static int 270 iso_mountfs(devvp, mp, td, argp) 271 register struct vnode *devvp; 272 struct mount *mp; 273 struct thread *td; 274 struct iso_args *argp; 275 { 276 register struct iso_mnt *isomp = (struct iso_mnt *)0; 277 struct buf *bp = NULL; 278 struct buf *pribp = NULL, *supbp = NULL; 279 dev_t dev = devvp->v_rdev; 280 int error = EINVAL; 281 int needclose = 0; 282 int high_sierra = 0; 283 int iso_bsize; 284 int iso_blknum; 285 int joliet_level; 286 struct iso_volume_descriptor *vdp = 0; 287 struct iso_primary_descriptor *pri = NULL; 288 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 289 struct iso_supplementary_descriptor *sup = NULL; 290 struct iso_directory_record *rootp; 291 int logical_block_size; 292 293 if (!(mp->mnt_flag & MNT_RDONLY)) 294 return EROFS; 295 296 /* 297 * Disallow multiple mounts of the same device. 298 * Disallow mounting of a device that is currently in use 299 * (except for root, which might share swap device for miniroot). 300 * Flush out any old buffers remaining from a previous use. 301 */ 302 if ((error = vfs_mountedon(devvp))) 303 return error; 304 if (vcount(devvp) > 1 && devvp != rootvp) 305 return EBUSY; 306 if ((error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0))) 307 return (error); 308 309 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 310 error = VOP_OPEN(devvp, FREAD, FSCRED, td); 311 VOP_UNLOCK(devvp, 0, td); 312 if (error) 313 return error; 314 if (devvp->v_rdev->si_iosize_max != 0) 315 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 316 if (mp->mnt_iosize_max > MAXPHYS) 317 mp->mnt_iosize_max = MAXPHYS; 318 319 needclose = 1; 320 321 /* This is the "logical sector size". The standard says this 322 * should be 2048 or the physical sector size on the device, 323 * whichever is greater. For now, we'll just use a constant. 324 */ 325 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 326 327 joliet_level = 0; 328 for (iso_blknum = 16 + argp->ssector; 329 iso_blknum < 100 + argp->ssector; 330 iso_blknum++) { 331 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 332 iso_bsize, NOCRED, &bp)) != 0) 333 goto out; 334 335 vdp = (struct iso_volume_descriptor *)bp->b_data; 336 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 337 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 338 sizeof vdp->id) != 0) { 339 error = EINVAL; 340 goto out; 341 } else 342 high_sierra = 1; 343 } 344 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 345 case ISO_VD_PRIMARY: 346 if (pribp == NULL) { 347 pribp = bp; 348 bp = NULL; 349 pri = (struct iso_primary_descriptor *)vdp; 350 pri_sierra = 351 (struct iso_sierra_primary_descriptor *)vdp; 352 } 353 break; 354 355 case ISO_VD_SUPPLEMENTARY: 356 if (supbp == NULL) { 357 supbp = bp; 358 bp = NULL; 359 sup = (struct iso_supplementary_descriptor *)vdp; 360 361 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 362 if (bcmp(sup->escape, "%/@", 3) == 0) 363 joliet_level = 1; 364 if (bcmp(sup->escape, "%/C", 3) == 0) 365 joliet_level = 2; 366 if (bcmp(sup->escape, "%/E", 3) == 0) 367 joliet_level = 3; 368 369 if ((isonum_711 (sup->flags) & 1) && 370 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 371 joliet_level = 0; 372 } 373 } 374 break; 375 376 case ISO_VD_END: 377 goto vd_end; 378 379 default: 380 break; 381 } 382 if (bp) { 383 brelse(bp); 384 bp = NULL; 385 } 386 } 387 vd_end: 388 if (bp) { 389 brelse(bp); 390 bp = NULL; 391 } 392 393 if (pri == NULL) { 394 error = EINVAL; 395 goto out; 396 } 397 398 logical_block_size = 399 isonum_723 (high_sierra? 400 pri_sierra->logical_block_size: 401 pri->logical_block_size); 402 403 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 404 || (logical_block_size & (logical_block_size - 1)) != 0) { 405 error = EINVAL; 406 goto out; 407 } 408 409 rootp = (struct iso_directory_record *) 410 (high_sierra? 411 pri_sierra->root_directory_record: 412 pri->root_directory_record); 413 414 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 415 isomp->logical_block_size = logical_block_size; 416 isomp->volume_space_size = 417 isonum_733 (high_sierra? 418 pri_sierra->volume_space_size: 419 pri->volume_space_size); 420 isomp->joliet_level = 0; 421 /* 422 * Since an ISO9660 multi-session CD can also access previous 423 * sessions, we have to include them into the space consider- 424 * ations. This doesn't yield a very accurate number since 425 * parts of the old sessions might be inaccessible now, but we 426 * can't do much better. This is also important for the NFS 427 * filehandle validation. 428 */ 429 isomp->volume_space_size += argp->ssector; 430 bcopy (rootp, isomp->root, sizeof isomp->root); 431 isomp->root_extent = isonum_733 (rootp->extent); 432 isomp->root_size = isonum_733 (rootp->size); 433 434 isomp->im_bmask = logical_block_size - 1; 435 isomp->im_bshift = ffs(logical_block_size) - 1; 436 437 pribp->b_flags |= B_AGE; 438 brelse(pribp); 439 pribp = NULL; 440 441 mp->mnt_data = (qaddr_t)isomp; 442 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 443 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 444 mp->mnt_maxsymlinklen = 0; 445 mp->mnt_flag |= MNT_LOCAL; 446 isomp->im_mountp = mp; 447 isomp->im_dev = dev; 448 isomp->im_devvp = devvp; 449 450 devvp->v_rdev->si_mountpoint = mp; 451 452 /* Check the Rock Ridge Extention support */ 453 if (!(argp->flags & ISOFSMNT_NORRIP)) { 454 if ((error = bread(isomp->im_devvp, 455 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 456 (isomp->im_bshift - DEV_BSHIFT), 457 isomp->logical_block_size, NOCRED, &bp)) != 0) 458 goto out; 459 460 rootp = (struct iso_directory_record *)bp->b_data; 461 462 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 463 argp->flags |= ISOFSMNT_NORRIP; 464 } else { 465 argp->flags &= ~ISOFSMNT_GENS; 466 } 467 468 /* 469 * The contents are valid, 470 * but they will get reread as part of another vnode, so... 471 */ 472 bp->b_flags |= B_AGE; 473 brelse(bp); 474 bp = NULL; 475 } 476 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 477 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 478 479 if (high_sierra) { 480 /* this effectively ignores all the mount flags */ 481 log(LOG_INFO, "cd9660: High Sierra Format\n"); 482 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 483 } else 484 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 485 default: 486 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 487 break; 488 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 489 isomp->iso_ftype = ISO_FTYPE_9660; 490 break; 491 case 0: 492 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 493 isomp->iso_ftype = ISO_FTYPE_RRIP; 494 break; 495 } 496 497 /* Decide whether to use the Joliet descriptor */ 498 499 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 500 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 501 rootp = (struct iso_directory_record *) 502 sup->root_directory_record; 503 bcopy (rootp, isomp->root, sizeof isomp->root); 504 isomp->root_extent = isonum_733 (rootp->extent); 505 isomp->root_size = isonum_733 (rootp->size); 506 isomp->joliet_level = joliet_level; 507 supbp->b_flags |= B_AGE; 508 } 509 510 if (supbp) { 511 brelse(supbp); 512 supbp = NULL; 513 } 514 515 return 0; 516 out: 517 devvp->v_rdev->si_mountpoint = NULL; 518 if (bp) 519 brelse(bp); 520 if (pribp) 521 brelse(pribp); 522 if (supbp) 523 brelse(supbp); 524 if (needclose) 525 (void)VOP_CLOSE(devvp, FREAD, NOCRED, td); 526 if (isomp) { 527 free((caddr_t)isomp, M_ISOFSMNT); 528 mp->mnt_data = (qaddr_t)0; 529 } 530 return error; 531 } 532 533 /* 534 * unmount system call 535 */ 536 static int 537 cd9660_unmount(mp, mntflags, td) 538 struct mount *mp; 539 int mntflags; 540 struct thread *td; 541 { 542 register struct iso_mnt *isomp; 543 int error, flags = 0; 544 545 if (mntflags & MNT_FORCE) 546 flags |= FORCECLOSE; 547 #if 0 548 mntflushbuf(mp, 0); 549 if (mntinvalbuf(mp)) 550 return EBUSY; 551 #endif 552 if ((error = vflush(mp, 0, flags))) 553 return (error); 554 555 isomp = VFSTOISOFS(mp); 556 557 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 558 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, td); 559 vrele(isomp->im_devvp); 560 free((caddr_t)isomp, M_ISOFSMNT); 561 mp->mnt_data = (qaddr_t)0; 562 mp->mnt_flag &= ~MNT_LOCAL; 563 return (error); 564 } 565 566 /* 567 * Return root of a filesystem 568 */ 569 static int 570 cd9660_root(mp, vpp) 571 struct mount *mp; 572 struct vnode **vpp; 573 { 574 struct iso_mnt *imp = VFSTOISOFS(mp); 575 struct iso_directory_record *dp = 576 (struct iso_directory_record *)imp->root; 577 ino_t ino = isodirino(dp, imp); 578 579 /* 580 * With RRIP we must use the `.' entry of the root directory. 581 * Simply tell vget, that it's a relocated directory. 582 */ 583 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp, 584 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 585 } 586 587 /* 588 * Get filesystem statistics. 589 */ 590 static int 591 cd9660_statfs(mp, sbp, td) 592 struct mount *mp; 593 register struct statfs *sbp; 594 struct thread *td; 595 { 596 register struct iso_mnt *isomp; 597 598 isomp = VFSTOISOFS(mp); 599 600 sbp->f_bsize = isomp->logical_block_size; 601 sbp->f_iosize = sbp->f_bsize; /* XXX */ 602 sbp->f_blocks = isomp->volume_space_size; 603 sbp->f_bfree = 0; /* total free blocks */ 604 sbp->f_bavail = 0; /* blocks free for non superuser */ 605 sbp->f_files = 0; /* total files */ 606 sbp->f_ffree = 0; /* free file nodes */ 607 if (sbp != &mp->mnt_stat) { 608 sbp->f_type = mp->mnt_vfc->vfc_typenum; 609 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 610 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 611 } 612 return 0; 613 } 614 615 /* 616 * File handle to vnode 617 * 618 * Have to be really careful about stale file handles: 619 * - check that the inode number is in range 620 * - call iget() to get the locked inode 621 * - check for an unallocated inode (i_mode == 0) 622 * - check that the generation number matches 623 */ 624 625 struct ifid { 626 ushort ifid_len; 627 ushort ifid_pad; 628 int ifid_ino; 629 long ifid_start; 630 }; 631 632 /* ARGSUSED */ 633 static int 634 cd9660_fhtovp(mp, fhp, vpp) 635 register struct mount *mp; 636 struct fid *fhp; 637 struct vnode **vpp; 638 { 639 struct ifid *ifhp = (struct ifid *)fhp; 640 register struct iso_node *ip; 641 struct vnode *nvp; 642 int error; 643 644 #ifdef ISOFS_DBG 645 printf("fhtovp: ino %d, start %ld\n", 646 ifhp->ifid_ino, ifhp->ifid_start); 647 #endif 648 649 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 650 *vpp = NULLVP; 651 return (error); 652 } 653 ip = VTOI(nvp); 654 if (ip->inode.iso_mode == 0) { 655 vput(nvp); 656 *vpp = NULLVP; 657 return (ESTALE); 658 } 659 *vpp = nvp; 660 return (0); 661 } 662 663 static int 664 cd9660_vget(mp, ino, flags, vpp) 665 struct mount *mp; 666 ino_t ino; 667 int flags; 668 struct vnode **vpp; 669 { 670 671 /* 672 * XXXX 673 * It would be nice if we didn't always set the `relocated' flag 674 * and force the extra read, but I don't want to think about fixing 675 * that right now. 676 */ 677 return (cd9660_vget_internal(mp, ino, flags, vpp, 678 #if 0 679 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 680 #else 681 0, 682 #endif 683 (struct iso_directory_record *)0)); 684 } 685 686 int 687 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir) 688 struct mount *mp; 689 ino_t ino; 690 int flags; 691 struct vnode **vpp; 692 int relocated; 693 struct iso_directory_record *isodir; 694 { 695 struct iso_mnt *imp; 696 struct iso_node *ip; 697 struct buf *bp; 698 struct vnode *vp; 699 dev_t dev; 700 int error; 701 702 imp = VFSTOISOFS(mp); 703 dev = imp->im_dev; 704 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0) 705 return (error); 706 if (*vpp != NULL) 707 return (0); 708 709 /* Allocate a new vnode/iso_node. */ 710 if ((error = getnewvnode("isofs", mp, cd9660_vnodeop_p, &vp)) != 0) { 711 *vpp = NULLVP; 712 return (error); 713 } 714 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 715 M_WAITOK | M_ZERO); 716 vp->v_data = ip; 717 ip->i_vnode = vp; 718 ip->i_dev = dev; 719 ip->i_number = ino; 720 721 /* 722 * Check to be sure that it did not show up. We have to put it 723 * on the hash chain as the cleanup from vput expects to find 724 * it there. 725 */ 726 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0 || 727 *vpp != NULL) { 728 cd9660_ihashins(ip); 729 vput(vp); 730 return (error); 731 } 732 733 /* 734 * Put it onto its hash chain and lock it so that other requests for 735 * this inode will block if they arrive while we are sleeping waiting 736 * for old data structures to be purged or for the contents of the 737 * disk portion of this inode to be read. 738 */ 739 cd9660_ihashins(ip); 740 741 if (isodir == 0) { 742 int lbn, off; 743 744 lbn = lblkno(imp, ino); 745 if (lbn >= imp->volume_space_size) { 746 vput(vp); 747 printf("fhtovp: lbn exceed volume space %d\n", lbn); 748 return (ESTALE); 749 } 750 751 off = blkoff(imp, ino); 752 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 753 vput(vp); 754 printf("fhtovp: crosses block boundary %d\n", 755 off + ISO_DIRECTORY_RECORD_SIZE); 756 return (ESTALE); 757 } 758 759 error = bread(imp->im_devvp, 760 lbn << (imp->im_bshift - DEV_BSHIFT), 761 imp->logical_block_size, NOCRED, &bp); 762 if (error) { 763 vput(vp); 764 brelse(bp); 765 printf("fhtovp: bread error %d\n",error); 766 return (error); 767 } 768 isodir = (struct iso_directory_record *)(bp->b_data + off); 769 770 if (off + isonum_711(isodir->length) > 771 imp->logical_block_size) { 772 vput(vp); 773 if (bp != 0) 774 brelse(bp); 775 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 776 off +isonum_711(isodir->length), off, 777 isonum_711(isodir->length)); 778 return (ESTALE); 779 } 780 781 #if 0 782 if (isonum_733(isodir->extent) + 783 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 784 if (bp != 0) 785 brelse(bp); 786 printf("fhtovp: file start miss %d vs %d\n", 787 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 788 ifhp->ifid_start); 789 return (ESTALE); 790 } 791 #endif 792 } else 793 bp = 0; 794 795 ip->i_mnt = imp; 796 ip->i_devvp = imp->im_devvp; 797 VREF(ip->i_devvp); 798 799 if (relocated) { 800 /* 801 * On relocated directories we must 802 * read the `.' entry out of a dir. 803 */ 804 ip->iso_start = ino >> imp->im_bshift; 805 if (bp != 0) 806 brelse(bp); 807 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 808 vput(vp); 809 return (error); 810 } 811 isodir = (struct iso_directory_record *)bp->b_data; 812 } 813 814 ip->iso_extent = isonum_733(isodir->extent); 815 ip->i_size = isonum_733(isodir->size); 816 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 817 818 /* 819 * Setup time stamp, attribute 820 */ 821 vp->v_type = VNON; 822 switch (imp->iso_ftype) { 823 default: /* ISO_FTYPE_9660 */ 824 { 825 struct buf *bp2; 826 int off; 827 if ((imp->im_flags & ISOFSMNT_EXTATT) 828 && (off = isonum_711(isodir->ext_attr_length))) 829 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 830 &bp2); 831 else 832 bp2 = NULL; 833 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 834 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 835 if (bp2) 836 brelse(bp2); 837 break; 838 } 839 case ISO_FTYPE_RRIP: 840 cd9660_rrip_analyze(isodir, ip, imp); 841 break; 842 } 843 844 if (bp != 0) 845 brelse(bp); 846 847 /* 848 * Initialize the associated vnode 849 */ 850 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 851 case VFIFO: 852 vp->v_op = cd9660_fifoop_p; 853 break; 854 case VCHR: 855 case VBLK: 856 vp->v_op = cd9660_specop_p; 857 vp = addaliasu(vp, ip->inode.iso_rdev); 858 ip->i_vnode = vp; 859 break; 860 default: 861 break; 862 } 863 864 if (ip->iso_extent == imp->root_extent) 865 vp->v_vflag |= VV_ROOT; 866 867 /* 868 * XXX need generation number? 869 */ 870 871 *vpp = vp; 872 return (0); 873 } 874 875 /* 876 * Vnode pointer to File handle 877 */ 878 /* ARGSUSED */ 879 static int 880 cd9660_vptofh(vp, fhp) 881 struct vnode *vp; 882 struct fid *fhp; 883 { 884 register struct iso_node *ip = VTOI(vp); 885 register struct ifid *ifhp; 886 887 ifhp = (struct ifid *)fhp; 888 ifhp->ifid_len = sizeof(struct ifid); 889 890 ifhp->ifid_ino = ip->i_number; 891 ifhp->ifid_start = ip->iso_start; 892 893 #ifdef ISOFS_DBG 894 printf("vptofh: ino %d, start %ld\n", 895 ifhp->ifid_ino,ifhp->ifid_start); 896 #endif 897 return 0; 898 } 899