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 * $Id: cd9660_vfsops.c,v 1.28 1997/09/07 16:20:42 bde Exp $ 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 <miscfs/specfs/specdev.h> 49 #include <sys/mount.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 57 #include <isofs/cd9660/iso.h> 58 #include <isofs/cd9660/iso_rrip.h> 59 #include <isofs/cd9660/cd9660_node.h> 60 #include <isofs/cd9660/cd9660_mount.h> 61 62 63 static int cd9660_mount __P((struct mount *, 64 char *, caddr_t, struct nameidata *, struct proc *)); 65 static int cd9660_start __P((struct mount *, int, struct proc *)); 66 static int cd9660_unmount __P((struct mount *, int, struct proc *)); 67 static int cd9660_root __P((struct mount *, struct vnode **)); 68 static int cd9660_quotactl __P((struct mount *, int, uid_t, caddr_t, 69 struct proc *)); 70 static int cd9660_statfs __P((struct mount *, struct statfs *, struct proc *)); 71 static int cd9660_sync __P((struct mount *, int, struct ucred *, 72 struct proc *)); 73 static int cd9660_vget __P((struct mount *, ino_t, struct vnode **)); 74 static int cd9660_fhtovp __P((struct mount *, struct fid *, struct sockaddr *, 75 struct vnode **, int *, struct ucred **)); 76 static int cd9660_vptofh __P((struct vnode *, struct fid *)); 77 78 static struct vfsops cd9660_vfsops = { 79 cd9660_mount, 80 cd9660_start, 81 cd9660_unmount, 82 cd9660_root, 83 cd9660_quotactl, 84 cd9660_statfs, 85 cd9660_sync, 86 cd9660_vget, 87 cd9660_fhtovp, 88 cd9660_vptofh, 89 cd9660_init 90 }; 91 VFS_SET(cd9660_vfsops, cd9660, MOUNT_CD9660, VFCF_READONLY); 92 93 94 /* 95 * Called by vfs_mountroot when iso is going to be mounted as root. 96 */ 97 98 static int iso_get_ssector __P((dev_t dev, struct proc *p)); 99 static int iso_mountfs __P((struct vnode *devvp, struct mount *mp, 100 struct proc *p, struct iso_args *argp)); 101 static int iso_mountroot __P((struct mount *mp, struct proc *p)); 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, p) 110 dev_t dev; 111 struct proc *p; 112 { 113 struct ioc_toc_header h; 114 struct ioc_read_toc_single_entry t; 115 int i; 116 struct bdevsw *bd; 117 d_ioctl_t *ioctlp; 118 119 bd = bdevsw[major(dev)]; 120 ioctlp = bd->d_ioctl; 121 if (ioctlp == NULL) 122 return 0; 123 124 if (ioctlp(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, p) == -1) 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, p) == -1) 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 144 iso_mountroot(mp, p) 145 struct mount *mp; 146 struct proc *p; 147 { 148 struct iso_args args; 149 int error; 150 151 if ((error = bdevvp(rootdev, &rootvp))) { 152 printf("iso_mountroot: can't find rootvp"); 153 return (error); 154 } 155 args.flags = ISOFSMNT_ROOT; 156 args.ssector = iso_get_ssector(rootdev, p); 157 if (bootverbose) 158 printf("iso_mountroot(): using session at block %d\n", 159 args.ssector); 160 if (error = iso_mountfs(rootvp, mp, p, &args)) 161 return (error); 162 163 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 164 return (0); 165 } 166 167 /* 168 * VFS Operations. 169 * 170 * mount system call 171 */ 172 static int 173 cd9660_mount(mp, path, data, ndp, p) 174 register struct mount *mp; 175 char *path; 176 caddr_t data; 177 struct nameidata *ndp; 178 struct proc *p; 179 { 180 struct vnode *devvp; 181 struct iso_args args; 182 u_int size; 183 int error; 184 struct iso_mnt *imp = 0; 185 186 if ((mp->mnt_flag & MNT_ROOTFS) != 0) { 187 if (bdevsw[major(rootdev)]->d_flags & D_NOCLUSTERR) 188 mp->mnt_flag |= MNT_NOCLUSTERR; 189 return (iso_mountroot(mp, p)); 190 } 191 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 192 return (error); 193 194 if ((mp->mnt_flag & MNT_RDONLY) == 0) 195 return (EROFS); 196 197 /* 198 * If updating, check whether changing from read-only to 199 * read/write; if there is no device name, that's all we do. 200 * Disallow clearing MNT_NOCLUSTERR flag, if block device requests. 201 */ 202 if (mp->mnt_flag & MNT_UPDATE) { 203 imp = VFSTOISOFS(mp); 204 if (bdevsw[major(imp->im_devvp->v_rdev)]->d_flags & 205 D_NOCLUSTERR) 206 mp->mnt_flag |= MNT_NOCLUSTERR; 207 if (args.fspec == 0) 208 return (vfs_export(mp, &imp->im_export, &args.export)); 209 } 210 /* 211 * Not an update, or updating the name: look up the name 212 * and verify that it refers to a sensible block device. 213 */ 214 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 215 if ((error = namei(ndp))) 216 return (error); 217 devvp = ndp->ni_vp; 218 219 if (devvp->v_type != VBLK) { 220 vrele(devvp); 221 return ENOTBLK; 222 } 223 if (major(devvp->v_rdev) >= nblkdev) { 224 vrele(devvp); 225 return ENXIO; 226 } 227 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 228 if (bdevsw[major(devvp->v_rdev)]->d_flags & D_NOCLUSTERR) 229 mp->mnt_flag |= MNT_NOCLUSTERR; 230 error = iso_mountfs(devvp, mp, p, &args); 231 } else { 232 if (devvp != imp->im_devvp) 233 error = EINVAL; /* needs translation */ 234 else 235 vrele(devvp); 236 } 237 if (error) { 238 vrele(devvp); 239 return error; 240 } 241 imp = VFSTOISOFS(mp); 242 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 243 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 244 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 245 &size); 246 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 247 (void) cd9660_statfs(mp, &mp->mnt_stat, p); 248 return 0; 249 } 250 251 /* 252 * Common code for mount and mountroot 253 */ 254 static int 255 iso_mountfs(devvp, mp, p, argp) 256 register struct vnode *devvp; 257 struct mount *mp; 258 struct proc *p; 259 struct iso_args *argp; 260 { 261 register struct iso_mnt *isomp = (struct iso_mnt *)0; 262 struct buf *bp = NULL; 263 dev_t dev = devvp->v_rdev; 264 int error = EINVAL; 265 int needclose = 0; 266 int high_sierra = 0; 267 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 268 int iso_bsize; 269 int iso_blknum; 270 struct iso_volume_descriptor *vdp; 271 struct iso_primary_descriptor *pri; 272 struct iso_sierra_primary_descriptor *pri_sierra; 273 struct iso_directory_record *rootp; 274 int logical_block_size; 275 276 if (!ronly) 277 return EROFS; 278 279 /* 280 * Disallow multiple mounts of the same device. 281 * Disallow mounting of a device that is currently in use 282 * (except for root, which might share swap device for miniroot). 283 * Flush out any old buffers remaining from a previous use. 284 */ 285 if ((error = vfs_mountedon(devvp))) 286 return error; 287 if (vcount(devvp) > 1 && devvp != rootvp) 288 return EBUSY; 289 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0))) 290 return (error); 291 292 if ((error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p))) 293 return error; 294 needclose = 1; 295 296 /* This is the "logical sector size". The standard says this 297 * should be 2048 or the physical sector size on the device, 298 * whichever is greater. For now, we'll just use a constant. 299 */ 300 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 301 302 for (iso_blknum = 16 + argp->ssector; 303 iso_blknum < 100 + argp->ssector; 304 iso_blknum++) { 305 if (error = bread(devvp, iso_blknum * btodb(iso_bsize), 306 iso_bsize, NOCRED, &bp)) 307 goto out; 308 309 vdp = (struct iso_volume_descriptor *)bp->b_data; 310 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 311 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 312 sizeof vdp->id) != 0) { 313 error = EINVAL; 314 goto out; 315 } else 316 high_sierra = 1; 317 } 318 319 if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) == ISO_VD_END) { 320 error = EINVAL; 321 goto out; 322 } 323 324 if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) == ISO_VD_PRIMARY) 325 break; 326 brelse(bp); 327 } 328 329 if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) != ISO_VD_PRIMARY) { 330 error = EINVAL; 331 goto out; 332 } 333 334 pri = (struct iso_primary_descriptor *)vdp; 335 pri_sierra = (struct iso_sierra_primary_descriptor *)vdp; 336 337 logical_block_size = 338 isonum_723 (high_sierra? 339 pri_sierra->logical_block_size: 340 pri->logical_block_size); 341 342 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 343 || (logical_block_size & (logical_block_size - 1)) != 0) { 344 error = EINVAL; 345 goto out; 346 } 347 348 rootp = (struct iso_directory_record *) 349 (high_sierra? 350 pri_sierra->root_directory_record: 351 pri->root_directory_record); 352 353 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 354 bzero((caddr_t)isomp, sizeof *isomp); 355 isomp->logical_block_size = logical_block_size; 356 isomp->volume_space_size = 357 isonum_733 (high_sierra? 358 pri_sierra->volume_space_size: 359 pri->volume_space_size); 360 /* 361 * Since an ISO9660 multi-session CD can also access previous 362 * sessions, we have to include them into the space consider- 363 * ations. This doesn't yield a very accurate number since 364 * parts of the old sessions might be inaccessible now, but we 365 * can't do much better. This is also important for the NFS 366 * filehandle validation. 367 */ 368 isomp->volume_space_size += argp->ssector; 369 bcopy (rootp, isomp->root, sizeof isomp->root); 370 isomp->root_extent = isonum_733 (rootp->extent); 371 isomp->root_size = isonum_733 (rootp->size); 372 373 isomp->im_bmask = logical_block_size - 1; 374 isomp->im_bshift = 0; 375 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 376 isomp->im_bshift++; 377 378 bp->b_flags |= B_AGE; 379 brelse(bp); 380 bp = NULL; 381 382 mp->mnt_data = (qaddr_t)isomp; 383 mp->mnt_stat.f_fsid.val[0] = (long)dev; 384 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 385 mp->mnt_maxsymlinklen = 0; 386 mp->mnt_flag |= MNT_LOCAL; 387 isomp->im_mountp = mp; 388 isomp->im_dev = dev; 389 isomp->im_devvp = devvp; 390 391 devvp->v_specflags |= SI_MOUNTEDON; 392 393 /* Check the Rock Ridge Extention support */ 394 if (!(argp->flags & ISOFSMNT_NORRIP)) { 395 if (error = bread(isomp->im_devvp, 396 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 397 (isomp->im_bshift - DEV_BSHIFT), 398 isomp->logical_block_size, NOCRED, &bp)) 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 argp->flags |= ISOFSMNT_NORRIP; 405 } else { 406 argp->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 } 417 isomp->im_flags = argp->flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS|ISOFSMNT_EXTATT); 418 419 if(high_sierra) 420 /* this effectively ignores all the mount flags */ 421 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 422 else 423 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 424 default: 425 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 426 break; 427 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 428 isomp->iso_ftype = ISO_FTYPE_9660; 429 break; 430 case 0: 431 isomp->iso_ftype = ISO_FTYPE_RRIP; 432 break; 433 } 434 435 return 0; 436 out: 437 if (bp) 438 brelse(bp); 439 if (needclose) 440 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 441 if (isomp) { 442 free((caddr_t)isomp, M_ISOFSMNT); 443 mp->mnt_data = (qaddr_t)0; 444 } 445 return error; 446 } 447 448 /* 449 * Make a filesystem operational. 450 * Nothing to do at the moment. 451 */ 452 /* ARGSUSED */ 453 static int 454 cd9660_start(mp, flags, p) 455 struct mount *mp; 456 int flags; 457 struct proc *p; 458 { 459 return 0; 460 } 461 462 /* 463 * unmount system call 464 */ 465 static int 466 cd9660_unmount(mp, mntflags, p) 467 struct mount *mp; 468 int mntflags; 469 struct proc *p; 470 { 471 register struct iso_mnt *isomp; 472 int error, flags = 0; 473 474 if (mntflags & MNT_FORCE) 475 flags |= FORCECLOSE; 476 #if 0 477 mntflushbuf(mp, 0); 478 if (mntinvalbuf(mp)) 479 return EBUSY; 480 #endif 481 if ((error = vflush(mp, NULLVP, flags))) 482 return (error); 483 484 isomp = VFSTOISOFS(mp); 485 486 487 isomp->im_devvp->v_specflags &= ~SI_MOUNTEDON; 488 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 489 vrele(isomp->im_devvp); 490 free((caddr_t)isomp, M_ISOFSMNT); 491 mp->mnt_data = (qaddr_t)0; 492 mp->mnt_flag &= ~MNT_LOCAL; 493 return (error); 494 } 495 496 /* 497 * Return root of a filesystem 498 */ 499 static int 500 cd9660_root(mp, vpp) 501 struct mount *mp; 502 struct vnode **vpp; 503 { 504 struct iso_mnt *imp = VFSTOISOFS(mp); 505 struct iso_directory_record *dp = 506 (struct iso_directory_record *)imp->root; 507 ino_t ino = isodirino(dp, imp); 508 509 /* 510 * With RRIP we must use the `.' entry of the root directory. 511 * Simply tell vget, that it's a relocated directory. 512 */ 513 return (cd9660_vget_internal(mp, ino, vpp, 514 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 515 } 516 517 /* 518 * Do operations associated with quotas, not supported 519 */ 520 /* ARGSUSED */ 521 static int 522 cd9660_quotactl(mp, cmd, uid, arg, p) 523 struct mount *mp; 524 int cmd; 525 uid_t uid; 526 caddr_t arg; 527 struct proc *p; 528 { 529 530 return (EOPNOTSUPP); 531 } 532 533 /* 534 * Get file system statistics. 535 */ 536 int 537 cd9660_statfs(mp, sbp, p) 538 struct mount *mp; 539 register struct statfs *sbp; 540 struct proc *p; 541 { 542 register struct iso_mnt *isomp; 543 544 isomp = VFSTOISOFS(mp); 545 546 sbp->f_type = MOUNT_CD9660; 547 sbp->f_bsize = isomp->logical_block_size; 548 sbp->f_iosize = sbp->f_bsize; /* XXX */ 549 sbp->f_blocks = isomp->volume_space_size; 550 sbp->f_bfree = 0; /* total free blocks */ 551 sbp->f_bavail = 0; /* blocks free for non superuser */ 552 sbp->f_files = 0; /* total files */ 553 sbp->f_ffree = 0; /* free file nodes */ 554 if (sbp != &mp->mnt_stat) { 555 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 556 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 557 } 558 /* Use the first spare for flags: */ 559 sbp->f_spare[0] = isomp->im_flags; 560 return 0; 561 } 562 563 /* ARGSUSED */ 564 static int 565 cd9660_sync(mp, waitfor, cred, p) 566 struct mount *mp; 567 int waitfor; 568 struct ucred *cred; 569 struct proc *p; 570 { 571 return (0); 572 } 573 574 /* 575 * File handle to vnode 576 * 577 * Have to be really careful about stale file handles: 578 * - check that the inode number is in range 579 * - call iget() to get the locked inode 580 * - check for an unallocated inode (i_mode == 0) 581 * - check that the generation number matches 582 */ 583 584 struct ifid { 585 ushort ifid_len; 586 ushort ifid_pad; 587 int ifid_ino; 588 long ifid_start; 589 }; 590 591 /* ARGSUSED */ 592 int 593 cd9660_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 594 register struct mount *mp; 595 struct fid *fhp; 596 struct sockaddr *nam; 597 struct vnode **vpp; 598 int *exflagsp; 599 struct ucred **credanonp; 600 { 601 struct ifid *ifhp = (struct ifid *)fhp; 602 register struct iso_node *ip; 603 register struct netcred *np; 604 register struct iso_mnt *imp = VFSTOISOFS(mp); 605 struct vnode *nvp; 606 int error; 607 608 #ifdef ISOFS_DBG 609 printf("fhtovp: ino %d, start %ld\n", 610 ifhp->ifid_ino, ifhp->ifid_start); 611 #endif 612 613 /* 614 * Get the export permission structure for this <mp, client> tuple. 615 */ 616 np = vfs_export_lookup(mp, &imp->im_export, nam); 617 if (np == NULL) 618 return (EACCES); 619 620 if (error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) { 621 *vpp = NULLVP; 622 return (error); 623 } 624 ip = VTOI(nvp); 625 if (ip->inode.iso_mode == 0) { 626 vput(nvp); 627 *vpp = NULLVP; 628 return (ESTALE); 629 } 630 *vpp = nvp; 631 *exflagsp = np->netc_exflags; 632 *credanonp = &np->netc_anon; 633 return (0); 634 } 635 636 int 637 cd9660_vget(mp, ino, vpp) 638 struct mount *mp; 639 ino_t ino; 640 struct vnode **vpp; 641 { 642 643 /* 644 * XXXX 645 * It would be nice if we didn't always set the `relocated' flag 646 * and force the extra read, but I don't want to think about fixing 647 * that right now. 648 */ 649 return (cd9660_vget_internal(mp, ino, vpp, 650 #if 0 651 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 652 #else 653 0, 654 #endif 655 (struct iso_directory_record *)0)); 656 } 657 658 int 659 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 660 struct mount *mp; 661 ino_t ino; 662 struct vnode **vpp; 663 int relocated; 664 struct iso_directory_record *isodir; 665 { 666 struct iso_mnt *imp; 667 struct iso_node *ip; 668 struct buf *bp; 669 struct vnode *vp, *nvp; 670 dev_t dev; 671 int error; 672 673 imp = VFSTOISOFS(mp); 674 dev = imp->im_dev; 675 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 676 return (0); 677 678 /* Allocate a new vnode/iso_node. */ 679 if (error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) { 680 *vpp = NULLVP; 681 return (error); 682 } 683 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 684 M_WAITOK); 685 bzero((caddr_t)ip, sizeof(struct iso_node)); 686 lockinit(&ip->i_lock, PINOD, "isonode", 0, 0); 687 vp->v_data = ip; 688 ip->i_vnode = vp; 689 ip->i_dev = dev; 690 ip->i_number = ino; 691 692 /* 693 * Put it onto its hash chain and lock it so that other requests for 694 * this inode will block if they arrive while we are sleeping waiting 695 * for old data structures to be purged or for the contents of the 696 * disk portion of this inode to be read. 697 */ 698 cd9660_ihashins(ip); 699 700 if (isodir == 0) { 701 int lbn, off; 702 703 lbn = lblkno(imp, ino); 704 if (lbn >= imp->volume_space_size) { 705 vput(vp); 706 printf("fhtovp: lbn exceed volume space %d\n", lbn); 707 return (ESTALE); 708 } 709 710 off = blkoff(imp, ino); 711 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 712 vput(vp); 713 printf("fhtovp: crosses block boundary %d\n", 714 off + ISO_DIRECTORY_RECORD_SIZE); 715 return (ESTALE); 716 } 717 718 error = bread(imp->im_devvp, 719 lbn << (imp->im_bshift - DEV_BSHIFT), 720 imp->logical_block_size, NOCRED, &bp); 721 if (error) { 722 vput(vp); 723 brelse(bp); 724 printf("fhtovp: bread error %d\n",error); 725 return (error); 726 } 727 isodir = (struct iso_directory_record *)(bp->b_data + off); 728 729 if (off + isonum_711(isodir->length) > 730 imp->logical_block_size) { 731 vput(vp); 732 if (bp != 0) 733 brelse(bp); 734 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 735 off +isonum_711(isodir->length), off, 736 isonum_711(isodir->length)); 737 return (ESTALE); 738 } 739 740 #if 0 741 if (isonum_733(isodir->extent) + 742 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 743 if (bp != 0) 744 brelse(bp); 745 printf("fhtovp: file start miss %d vs %d\n", 746 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 747 ifhp->ifid_start); 748 return (ESTALE); 749 } 750 #endif 751 } else 752 bp = 0; 753 754 ip->i_mnt = imp; 755 ip->i_devvp = imp->im_devvp; 756 VREF(ip->i_devvp); 757 758 if (relocated) { 759 /* 760 * On relocated directories we must 761 * read the `.' entry out of a dir. 762 */ 763 ip->iso_start = ino >> imp->im_bshift; 764 if (bp != 0) 765 brelse(bp); 766 if (error = VOP_BLKATOFF(vp, (off_t)0, NULL, &bp)) { 767 vput(vp); 768 return (error); 769 } 770 isodir = (struct iso_directory_record *)bp->b_data; 771 } 772 773 ip->iso_extent = isonum_733(isodir->extent); 774 ip->i_size = isonum_733(isodir->size); 775 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 776 777 /* 778 * Setup time stamp, attribute 779 */ 780 vp->v_type = VNON; 781 switch (imp->iso_ftype) { 782 default: /* ISO_FTYPE_9660 */ 783 { 784 struct buf *bp2; 785 int off; 786 if ((imp->im_flags & ISOFSMNT_EXTATT) 787 && (off = isonum_711(isodir->ext_attr_length))) 788 VOP_BLKATOFF(vp, (off_t)-(off << imp->im_bshift), NULL, 789 &bp2); 790 else 791 bp2 = NULL; 792 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 793 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 794 if (bp2) 795 brelse(bp2); 796 break; 797 } 798 case ISO_FTYPE_RRIP: 799 cd9660_rrip_analyze(isodir, ip, imp); 800 break; 801 } 802 803 if (bp != 0) 804 brelse(bp); 805 806 /* 807 * Initialize the associated vnode 808 */ 809 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 810 case VFIFO: 811 vp->v_op = cd9660_fifoop_p; 812 break; 813 case VCHR: 814 case VBLK: 815 /* 816 * if device, look at device number table for translation 817 */ 818 vp->v_op = cd9660_specop_p; 819 if (nvp = checkalias(vp, ip->inode.iso_rdev, mp)) { 820 /* 821 * Discard unneeded vnode, but save its iso_node. 822 * Note that the lock is carried over in the iso_node 823 * to the replacement vnode. 824 */ 825 nvp->v_data = vp->v_data; 826 vp->v_data = NULL; 827 vp->v_op = spec_vnodeop_p; 828 vrele(vp); 829 vgone(vp); 830 /* 831 * Reinitialize aliased inode. 832 */ 833 vp = nvp; 834 ip->i_vnode = vp; 835 } 836 break; 837 } 838 839 if (ip->iso_extent == imp->root_extent) 840 vp->v_flag |= VROOT; 841 842 /* 843 * XXX need generation number? 844 */ 845 846 *vpp = vp; 847 return (0); 848 } 849 850 /* 851 * Vnode pointer to File handle 852 */ 853 /* ARGSUSED */ 854 int 855 cd9660_vptofh(vp, fhp) 856 struct vnode *vp; 857 struct fid *fhp; 858 { 859 register struct iso_node *ip = VTOI(vp); 860 register struct ifid *ifhp; 861 862 ifhp = (struct ifid *)fhp; 863 ifhp->ifid_len = sizeof(struct ifid); 864 865 ifhp->ifid_ino = ip->i_number; 866 ifhp->ifid_start = ip->iso_start; 867 868 #ifdef ISOFS_DBG 869 printf("vptofh: ino %d, start %ld\n", 870 ifhp->ifid_ino,ifhp->ifid_start); 871 #endif 872 return 0; 873 } 874