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