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 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/proc.h> 44 #include <sys/kernel.h> 45 #include <sys/vnode.h> 46 #include <sys/mount.h> 47 #include <sys/bio.h> 48 #include <sys/buf.h> 49 #include <sys/cdio.h> 50 #include <sys/conf.h> 51 #include <sys/fcntl.h> 52 #include <sys/malloc.h> 53 #include <sys/stat.h> 54 #include <sys/syslog.h> 55 #include <sys/iconv.h> 56 57 58 #include <isofs/cd9660/iso.h> 59 #include <isofs/cd9660/iso_rrip.h> 60 #include <isofs/cd9660/cd9660_node.h> 61 #include <isofs/cd9660/cd9660_mount.h> 62 63 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 64 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part"); 65 66 struct iconv_functions *cd9660_iconv = NULL; 67 68 static vfs_omount_t cd9660_omount; 69 static vfs_unmount_t cd9660_unmount; 70 static vfs_root_t cd9660_root; 71 static vfs_statfs_t cd9660_statfs; 72 static vfs_vget_t cd9660_vget; 73 static vfs_fhtovp_t cd9660_fhtovp; 74 static vfs_vptofh_t cd9660_vptofh; 75 76 static struct vfsops cd9660_vfsops = { 77 .vfs_fhtovp = cd9660_fhtovp, 78 .vfs_init = cd9660_init, 79 .vfs_omount = cd9660_omount, 80 .vfs_root = cd9660_root, 81 .vfs_statfs = cd9660_statfs, 82 .vfs_uninit = cd9660_uninit, 83 .vfs_unmount = cd9660_unmount, 84 .vfs_vget = cd9660_vget, 85 .vfs_vptofh = cd9660_vptofh, 86 }; 87 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 88 MODULE_VERSION(cd9660, 1); 89 90 91 /* 92 * Called by vfs_mountroot when iso is going to be mounted as root. 93 */ 94 95 static int iso_get_ssector(struct cdev *dev, struct thread *td); 96 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 97 struct thread *td, struct iso_args *argp); 98 99 /* 100 * Try to find the start of the last data track on this CD-ROM. This 101 * is used to mount the last session of a multi-session CD. Bail out 102 * and return 0 if we fail, this is always a safe bet. 103 */ 104 static int 105 iso_get_ssector(dev, td) 106 struct cdev *dev; 107 struct thread *td; 108 { 109 struct ioc_toc_header h; 110 struct ioc_read_toc_single_entry t; 111 int i; 112 struct cdevsw *bd; 113 d_ioctl_t *ioctlp; 114 115 bd = devsw(dev); 116 ioctlp = bd->d_ioctl; 117 if (ioctlp == NULL) 118 return 0; 119 120 if (ioctlp(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0) 121 return 0; 122 123 for (i = h.ending_track; i >= 0; i--) { 124 t.address_format = CD_LBA_FORMAT; 125 t.track = i; 126 if (ioctlp(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) 127 return 0; 128 if ((t.entry.control & 4) != 0) 129 /* found a data track */ 130 break; 131 } 132 133 if (i < 0) 134 return 0; 135 136 return ntohl(t.entry.addr.lba); 137 } 138 139 static int iso_mountroot(struct mount *mp, struct thread *td); 140 141 static int 142 iso_mountroot(mp, td) 143 struct mount *mp; 144 struct thread *td; 145 { 146 struct iso_args args; 147 struct vnode *rootvp; 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_omount(mp, path, data, td) 183 struct mount *mp; 184 char *path; 185 caddr_t data; 186 struct thread *td; 187 { 188 struct vnode *devvp; 189 struct iso_args args; 190 size_t size; 191 int error; 192 mode_t accessmode; 193 struct iso_mnt *imp = 0; 194 struct nameidata ndp; 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 struct vnode *devvp; 269 struct mount *mp; 270 struct thread *td; 271 struct iso_args *argp; 272 { 273 struct iso_mnt *isomp = (struct iso_mnt *)0; 274 struct buf *bp = NULL; 275 struct buf *pribp = NULL, *supbp = NULL; 276 struct cdev *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) 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 ISOFSMNT_KICONV); 476 477 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 478 cd9660_iconv->open(argp->cs_local, argp->cs_disk, &isomp->im_d2l); 479 cd9660_iconv->open(argp->cs_disk, argp->cs_local, &isomp->im_l2d); 480 } else { 481 isomp->im_d2l = NULL; 482 isomp->im_l2d = NULL; 483 } 484 485 if (high_sierra) { 486 /* this effectively ignores all the mount flags */ 487 log(LOG_INFO, "cd9660: High Sierra Format\n"); 488 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 489 } else 490 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 491 default: 492 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 493 break; 494 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 495 isomp->iso_ftype = ISO_FTYPE_9660; 496 break; 497 case 0: 498 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 499 isomp->iso_ftype = ISO_FTYPE_RRIP; 500 break; 501 } 502 503 /* Decide whether to use the Joliet descriptor */ 504 505 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 506 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 507 rootp = (struct iso_directory_record *) 508 sup->root_directory_record; 509 bcopy (rootp, isomp->root, sizeof isomp->root); 510 isomp->root_extent = isonum_733 (rootp->extent); 511 isomp->root_size = isonum_733 (rootp->size); 512 isomp->joliet_level = joliet_level; 513 supbp->b_flags |= B_AGE; 514 } 515 516 if (supbp) { 517 brelse(supbp); 518 supbp = NULL; 519 } 520 521 return 0; 522 out: 523 devvp->v_rdev->si_mountpoint = NULL; 524 if (bp) 525 brelse(bp); 526 if (pribp) 527 brelse(pribp); 528 if (supbp) 529 brelse(supbp); 530 if (needclose) 531 (void)VOP_CLOSE(devvp, FREAD, NOCRED, td); 532 if (isomp) { 533 free((caddr_t)isomp, M_ISOFSMNT); 534 mp->mnt_data = (qaddr_t)0; 535 } 536 return error; 537 } 538 539 /* 540 * unmount system call 541 */ 542 static int 543 cd9660_unmount(mp, mntflags, td) 544 struct mount *mp; 545 int mntflags; 546 struct thread *td; 547 { 548 struct iso_mnt *isomp; 549 int error, flags = 0; 550 551 if (mntflags & MNT_FORCE) 552 flags |= FORCECLOSE; 553 #if 0 554 mntflushbuf(mp, 0); 555 if (mntinvalbuf(mp)) 556 return EBUSY; 557 #endif 558 if ((error = vflush(mp, 0, flags, td))) 559 return (error); 560 561 isomp = VFSTOISOFS(mp); 562 563 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 564 if (isomp->im_d2l) 565 cd9660_iconv->close(isomp->im_d2l); 566 if (isomp->im_l2d) 567 cd9660_iconv->close(isomp->im_l2d); 568 } 569 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 570 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, td); 571 vrele(isomp->im_devvp); 572 free((caddr_t)isomp, M_ISOFSMNT); 573 mp->mnt_data = (qaddr_t)0; 574 mp->mnt_flag &= ~MNT_LOCAL; 575 return (error); 576 } 577 578 /* 579 * Return root of a filesystem 580 */ 581 static int 582 cd9660_root(mp, vpp, td) 583 struct mount *mp; 584 struct vnode **vpp; 585 struct thread *td; 586 { 587 struct iso_mnt *imp = VFSTOISOFS(mp); 588 struct iso_directory_record *dp = 589 (struct iso_directory_record *)imp->root; 590 ino_t ino = isodirino(dp, imp); 591 592 /* 593 * With RRIP we must use the `.' entry of the root directory. 594 * Simply tell vget, that it's a relocated directory. 595 */ 596 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp, 597 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 598 } 599 600 /* 601 * Get filesystem statistics. 602 */ 603 static int 604 cd9660_statfs(mp, sbp, td) 605 struct mount *mp; 606 struct statfs *sbp; 607 struct thread *td; 608 { 609 struct iso_mnt *isomp; 610 611 isomp = VFSTOISOFS(mp); 612 613 sbp->f_bsize = isomp->logical_block_size; 614 sbp->f_iosize = sbp->f_bsize; /* XXX */ 615 sbp->f_blocks = isomp->volume_space_size; 616 sbp->f_bfree = 0; /* total free blocks */ 617 sbp->f_bavail = 0; /* blocks free for non superuser */ 618 sbp->f_files = 0; /* total files */ 619 sbp->f_ffree = 0; /* free file nodes */ 620 if (sbp != &mp->mnt_stat) { 621 sbp->f_type = mp->mnt_vfc->vfc_typenum; 622 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 623 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 624 } 625 return 0; 626 } 627 628 /* 629 * File handle to vnode 630 * 631 * Have to be really careful about stale file handles: 632 * - check that the inode number is in range 633 * - call iget() to get the locked inode 634 * - check for an unallocated inode (i_mode == 0) 635 * - check that the generation number matches 636 */ 637 638 struct ifid { 639 u_short ifid_len; 640 u_short ifid_pad; 641 int ifid_ino; 642 long ifid_start; 643 }; 644 645 /* ARGSUSED */ 646 static int 647 cd9660_fhtovp(mp, fhp, vpp) 648 struct mount *mp; 649 struct fid *fhp; 650 struct vnode **vpp; 651 { 652 struct ifid *ifhp = (struct ifid *)fhp; 653 struct iso_node *ip; 654 struct vnode *nvp; 655 int error; 656 657 #ifdef ISOFS_DBG 658 printf("fhtovp: ino %d, start %ld\n", 659 ifhp->ifid_ino, ifhp->ifid_start); 660 #endif 661 662 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 663 *vpp = NULLVP; 664 return (error); 665 } 666 ip = VTOI(nvp); 667 if (ip->inode.iso_mode == 0) { 668 vput(nvp); 669 *vpp = NULLVP; 670 return (ESTALE); 671 } 672 *vpp = nvp; 673 return (0); 674 } 675 676 static int 677 cd9660_vget(mp, ino, flags, vpp) 678 struct mount *mp; 679 ino_t ino; 680 int flags; 681 struct vnode **vpp; 682 { 683 684 /* 685 * XXXX 686 * It would be nice if we didn't always set the `relocated' flag 687 * and force the extra read, but I don't want to think about fixing 688 * that right now. 689 */ 690 return (cd9660_vget_internal(mp, ino, flags, vpp, 691 #if 0 692 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 693 #else 694 0, 695 #endif 696 (struct iso_directory_record *)0)); 697 } 698 699 int 700 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir) 701 struct mount *mp; 702 ino_t ino; 703 int flags; 704 struct vnode **vpp; 705 int relocated; 706 struct iso_directory_record *isodir; 707 { 708 struct iso_mnt *imp; 709 struct iso_node *ip; 710 struct buf *bp; 711 struct vnode *vp; 712 struct cdev *dev; 713 int error; 714 715 imp = VFSTOISOFS(mp); 716 dev = imp->im_dev; 717 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0) 718 return (error); 719 if (*vpp != NULL) 720 return (0); 721 722 /* Allocate a new vnode/iso_node. */ 723 if ((error = getnewvnode("isofs", mp, cd9660_vnodeop_p, &vp)) != 0) { 724 *vpp = NULLVP; 725 return (error); 726 } 727 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 728 M_WAITOK | M_ZERO); 729 vp->v_data = ip; 730 ip->i_vnode = vp; 731 ip->i_dev = dev; 732 ip->i_number = ino; 733 734 /* 735 * Check to be sure that it did not show up. We have to put it 736 * on the hash chain as the cleanup from vput expects to find 737 * it there. 738 */ 739 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0 || 740 *vpp != NULL) { 741 cd9660_ihashins(ip); 742 vput(vp); 743 return (error); 744 } 745 746 /* 747 * Put it onto its hash chain and lock it so that other requests for 748 * this inode will block if they arrive while we are sleeping waiting 749 * for old data structures to be purged or for the contents of the 750 * disk portion of this inode to be read. 751 */ 752 cd9660_ihashins(ip); 753 754 if (isodir == 0) { 755 int lbn, off; 756 757 lbn = lblkno(imp, ino); 758 if (lbn >= imp->volume_space_size) { 759 vput(vp); 760 printf("fhtovp: lbn exceed volume space %d\n", lbn); 761 return (ESTALE); 762 } 763 764 off = blkoff(imp, ino); 765 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 766 vput(vp); 767 printf("fhtovp: crosses block boundary %d\n", 768 off + ISO_DIRECTORY_RECORD_SIZE); 769 return (ESTALE); 770 } 771 772 error = bread(imp->im_devvp, 773 lbn << (imp->im_bshift - DEV_BSHIFT), 774 imp->logical_block_size, NOCRED, &bp); 775 if (error) { 776 vput(vp); 777 brelse(bp); 778 printf("fhtovp: bread error %d\n",error); 779 return (error); 780 } 781 isodir = (struct iso_directory_record *)(bp->b_data + off); 782 783 if (off + isonum_711(isodir->length) > 784 imp->logical_block_size) { 785 vput(vp); 786 if (bp != 0) 787 brelse(bp); 788 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 789 off +isonum_711(isodir->length), off, 790 isonum_711(isodir->length)); 791 return (ESTALE); 792 } 793 794 #if 0 795 if (isonum_733(isodir->extent) + 796 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 797 if (bp != 0) 798 brelse(bp); 799 printf("fhtovp: file start miss %d vs %d\n", 800 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 801 ifhp->ifid_start); 802 return (ESTALE); 803 } 804 #endif 805 } else 806 bp = 0; 807 808 ip->i_mnt = imp; 809 ip->i_devvp = imp->im_devvp; 810 VREF(ip->i_devvp); 811 812 if (relocated) { 813 /* 814 * On relocated directories we must 815 * read the `.' entry out of a dir. 816 */ 817 ip->iso_start = ino >> imp->im_bshift; 818 if (bp != 0) 819 brelse(bp); 820 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 821 vput(vp); 822 return (error); 823 } 824 isodir = (struct iso_directory_record *)bp->b_data; 825 } 826 827 ip->iso_extent = isonum_733(isodir->extent); 828 ip->i_size = isonum_733(isodir->size); 829 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 830 831 /* 832 * Setup time stamp, attribute 833 */ 834 vp->v_type = VNON; 835 switch (imp->iso_ftype) { 836 default: /* ISO_FTYPE_9660 */ 837 { 838 struct buf *bp2; 839 int off; 840 if ((imp->im_flags & ISOFSMNT_EXTATT) 841 && (off = isonum_711(isodir->ext_attr_length))) 842 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 843 &bp2); 844 else 845 bp2 = NULL; 846 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 847 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 848 if (bp2) 849 brelse(bp2); 850 break; 851 } 852 case ISO_FTYPE_RRIP: 853 cd9660_rrip_analyze(isodir, ip, imp); 854 break; 855 } 856 857 if (bp != 0) 858 brelse(bp); 859 860 /* 861 * Initialize the associated vnode 862 */ 863 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 864 case VFIFO: 865 vp->v_op = cd9660_fifoop_p; 866 break; 867 case VBLK: 868 vp->v_op = cd9660_specop_p; 869 break; 870 case VCHR: 871 vp->v_op = cd9660_specop_p; 872 vp = addaliasu(vp, ip->inode.iso_rdev); 873 ip->i_vnode = vp; 874 break; 875 default: 876 break; 877 } 878 879 if (ip->iso_extent == imp->root_extent) 880 vp->v_vflag |= VV_ROOT; 881 882 /* 883 * XXX need generation number? 884 */ 885 886 *vpp = vp; 887 return (0); 888 } 889 890 /* 891 * Vnode pointer to File handle 892 */ 893 /* ARGSUSED */ 894 static int 895 cd9660_vptofh(vp, fhp) 896 struct vnode *vp; 897 struct fid *fhp; 898 { 899 struct iso_node *ip = VTOI(vp); 900 struct ifid *ifhp; 901 902 ifhp = (struct ifid *)fhp; 903 ifhp->ifid_len = sizeof(struct ifid); 904 905 ifhp->ifid_ino = ip->i_number; 906 ifhp->ifid_start = ip->iso_start; 907 908 #ifdef ISOFS_DBG 909 printf("vptofh: ino %d, start %ld\n", 910 ifhp->ifid_ino,ifhp->ifid_start); 911 #endif 912 return 0; 913 } 914