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_mount_t cd9660_mount; 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_mount = cd9660_mount, 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 int error; 148 149 if ((error = bdevvp(rootdev, &rootvp))) { 150 printf("iso_mountroot: can't find rootvp\n"); 151 return (error); 152 } 153 args.flags = ISOFSMNT_ROOT; 154 155 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td); 156 error = VOP_OPEN(rootvp, FREAD, FSCRED, td, -1); 157 VOP_UNLOCK(rootvp, 0, td); 158 if (error) 159 return error; 160 161 args.ssector = iso_get_ssector(rootdev, td); 162 163 (void)VOP_CLOSE(rootvp, FREAD, NOCRED, td); 164 165 if (bootverbose) 166 printf("iso_mountroot(): using session at block %d\n", 167 args.ssector); 168 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0) 169 return (error); 170 171 (void)cd9660_statfs(mp, &mp->mnt_stat, td); 172 return (0); 173 } 174 175 /* 176 * VFS Operations. 177 * 178 * mount system call 179 */ 180 static int 181 cd9660_mount(mp, path, data, ndp, td) 182 struct mount *mp; 183 char *path; 184 caddr_t data; 185 struct nameidata *ndp; 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; 194 195 if (path == NULL) /* We are doing the initial root mount */ 196 return (iso_mountroot(mp, td)); 197 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 198 return (error); 199 200 if ((mp->mnt_flag & MNT_RDONLY) == 0) 201 return (EROFS); 202 203 /* 204 * If updating, check whether changing from read-only to 205 * read/write; if there is no device name, that's all we do. 206 */ 207 if (mp->mnt_flag & MNT_UPDATE) { 208 imp = VFSTOISOFS(mp); 209 if (args.fspec == 0) 210 return (vfs_export(mp, &args.export)); 211 } 212 /* 213 * Not an update, or updating the name: look up the name 214 * and verify that it refers to a sensible block device. 215 */ 216 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td); 217 if ((error = namei(ndp))) 218 return (error); 219 NDFREE(ndp, NDF_ONLY_PNBUF); 220 devvp = ndp->ni_vp; 221 222 if (!vn_isdisk(devvp, &error)) { 223 vrele(devvp); 224 return (error); 225 } 226 227 /* 228 * Verify that user has necessary permissions on the device, 229 * or has superuser abilities 230 */ 231 accessmode = VREAD; 232 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 233 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td); 234 if (error) 235 error = suser(td); 236 if (error) { 237 vput(devvp); 238 return (error); 239 } 240 VOP_UNLOCK(devvp, 0, td); 241 242 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 243 error = iso_mountfs(devvp, mp, td, &args); 244 } else { 245 if (devvp != imp->im_devvp) 246 error = EINVAL; /* needs translation */ 247 else 248 vrele(devvp); 249 } 250 if (error) { 251 vrele(devvp); 252 return error; 253 } 254 imp = VFSTOISOFS(mp); 255 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 256 &size); 257 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 258 (void) cd9660_statfs(mp, &mp->mnt_stat, td); 259 return 0; 260 } 261 262 /* 263 * Common code for mount and mountroot 264 */ 265 static int 266 iso_mountfs(devvp, mp, td, argp) 267 struct vnode *devvp; 268 struct mount *mp; 269 struct thread *td; 270 struct iso_args *argp; 271 { 272 struct iso_mnt *isomp = (struct iso_mnt *)0; 273 struct buf *bp = NULL; 274 struct buf *pribp = NULL, *supbp = NULL; 275 struct cdev *dev = devvp->v_rdev; 276 int error = EINVAL; 277 int needclose = 0; 278 int high_sierra = 0; 279 int iso_bsize; 280 int iso_blknum; 281 int joliet_level; 282 struct iso_volume_descriptor *vdp = 0; 283 struct iso_primary_descriptor *pri = NULL; 284 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 285 struct iso_supplementary_descriptor *sup = NULL; 286 struct iso_directory_record *rootp; 287 int logical_block_size; 288 289 if (!(mp->mnt_flag & MNT_RDONLY)) 290 return EROFS; 291 292 /* 293 * Disallow multiple mounts of the same device. 294 * Disallow mounting of a device that is currently in use 295 * (except for root, which might share swap device for miniroot). 296 * Flush out any old buffers remaining from a previous use. 297 */ 298 if ((error = vfs_mountedon(devvp))) 299 return error; 300 if (vcount(devvp) > 1 && devvp != rootvp) 301 return EBUSY; 302 if ((error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0))) 303 return (error); 304 305 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 306 error = VOP_OPEN(devvp, FREAD, FSCRED, td, -1); 307 VOP_UNLOCK(devvp, 0, td); 308 if (error) 309 return error; 310 if (devvp->v_rdev->si_iosize_max != 0) 311 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 312 if (mp->mnt_iosize_max > MAXPHYS) 313 mp->mnt_iosize_max = MAXPHYS; 314 315 needclose = 1; 316 317 /* This is the "logical sector size". The standard says this 318 * should be 2048 or the physical sector size on the device, 319 * whichever is greater. For now, we'll just use a constant. 320 */ 321 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 322 323 joliet_level = 0; 324 for (iso_blknum = 16 + argp->ssector; 325 iso_blknum < 100 + argp->ssector; 326 iso_blknum++) { 327 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 328 iso_bsize, NOCRED, &bp)) != 0) 329 goto out; 330 331 vdp = (struct iso_volume_descriptor *)bp->b_data; 332 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 333 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 334 sizeof vdp->id) != 0) { 335 error = EINVAL; 336 goto out; 337 } else 338 high_sierra = 1; 339 } 340 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 341 case ISO_VD_PRIMARY: 342 if (pribp == NULL) { 343 pribp = bp; 344 bp = NULL; 345 pri = (struct iso_primary_descriptor *)vdp; 346 pri_sierra = 347 (struct iso_sierra_primary_descriptor *)vdp; 348 } 349 break; 350 351 case ISO_VD_SUPPLEMENTARY: 352 if (supbp == NULL) { 353 supbp = bp; 354 bp = NULL; 355 sup = (struct iso_supplementary_descriptor *)vdp; 356 357 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 358 if (bcmp(sup->escape, "%/@", 3) == 0) 359 joliet_level = 1; 360 if (bcmp(sup->escape, "%/C", 3) == 0) 361 joliet_level = 2; 362 if (bcmp(sup->escape, "%/E", 3) == 0) 363 joliet_level = 3; 364 365 if ((isonum_711 (sup->flags) & 1) && 366 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 367 joliet_level = 0; 368 } 369 } 370 break; 371 372 case ISO_VD_END: 373 goto vd_end; 374 375 default: 376 break; 377 } 378 if (bp) { 379 brelse(bp); 380 bp = NULL; 381 } 382 } 383 vd_end: 384 if (bp) { 385 brelse(bp); 386 bp = NULL; 387 } 388 389 if (pri == NULL) { 390 error = EINVAL; 391 goto out; 392 } 393 394 logical_block_size = 395 isonum_723 (high_sierra? 396 pri_sierra->logical_block_size: 397 pri->logical_block_size); 398 399 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 400 || (logical_block_size & (logical_block_size - 1)) != 0) { 401 error = EINVAL; 402 goto out; 403 } 404 405 rootp = (struct iso_directory_record *) 406 (high_sierra? 407 pri_sierra->root_directory_record: 408 pri->root_directory_record); 409 410 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 411 isomp->logical_block_size = logical_block_size; 412 isomp->volume_space_size = 413 isonum_733 (high_sierra? 414 pri_sierra->volume_space_size: 415 pri->volume_space_size); 416 isomp->joliet_level = 0; 417 /* 418 * Since an ISO9660 multi-session CD can also access previous 419 * sessions, we have to include them into the space consider- 420 * ations. This doesn't yield a very accurate number since 421 * parts of the old sessions might be inaccessible now, but we 422 * can't do much better. This is also important for the NFS 423 * filehandle validation. 424 */ 425 isomp->volume_space_size += argp->ssector; 426 bcopy (rootp, isomp->root, sizeof isomp->root); 427 isomp->root_extent = isonum_733 (rootp->extent); 428 isomp->root_size = isonum_733 (rootp->size); 429 430 isomp->im_bmask = logical_block_size - 1; 431 isomp->im_bshift = ffs(logical_block_size) - 1; 432 433 pribp->b_flags |= B_AGE; 434 brelse(pribp); 435 pribp = NULL; 436 437 mp->mnt_data = (qaddr_t)isomp; 438 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 439 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 440 mp->mnt_maxsymlinklen = 0; 441 mp->mnt_flag |= MNT_LOCAL; 442 isomp->im_mountp = mp; 443 isomp->im_dev = dev; 444 isomp->im_devvp = devvp; 445 446 devvp->v_rdev->si_mountpoint = mp; 447 448 /* Check the Rock Ridge Extention support */ 449 if (!(argp->flags & ISOFSMNT_NORRIP)) { 450 if ((error = bread(isomp->im_devvp, 451 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 452 (isomp->im_bshift - DEV_BSHIFT), 453 isomp->logical_block_size, NOCRED, &bp)) != 0) 454 goto out; 455 456 rootp = (struct iso_directory_record *)bp->b_data; 457 458 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 459 argp->flags |= ISOFSMNT_NORRIP; 460 } else { 461 argp->flags &= ~ISOFSMNT_GENS; 462 } 463 464 /* 465 * The contents are valid, 466 * but they will get reread as part of another vnode, so... 467 */ 468 bp->b_flags |= B_AGE; 469 brelse(bp); 470 bp = NULL; 471 } 472 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 473 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | 474 ISOFSMNT_KICONV); 475 476 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 477 cd9660_iconv->open(argp->cs_local, argp->cs_disk, &isomp->im_d2l); 478 cd9660_iconv->open(argp->cs_disk, argp->cs_local, &isomp->im_l2d); 479 } else { 480 isomp->im_d2l = NULL; 481 isomp->im_l2d = NULL; 482 } 483 484 if (high_sierra) { 485 /* this effectively ignores all the mount flags */ 486 log(LOG_INFO, "cd9660: High Sierra Format\n"); 487 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 488 } else 489 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 490 default: 491 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 492 break; 493 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 494 isomp->iso_ftype = ISO_FTYPE_9660; 495 break; 496 case 0: 497 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 498 isomp->iso_ftype = ISO_FTYPE_RRIP; 499 break; 500 } 501 502 /* Decide whether to use the Joliet descriptor */ 503 504 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 505 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 506 rootp = (struct iso_directory_record *) 507 sup->root_directory_record; 508 bcopy (rootp, isomp->root, sizeof isomp->root); 509 isomp->root_extent = isonum_733 (rootp->extent); 510 isomp->root_size = isonum_733 (rootp->size); 511 isomp->joliet_level = joliet_level; 512 supbp->b_flags |= B_AGE; 513 } 514 515 if (supbp) { 516 brelse(supbp); 517 supbp = NULL; 518 } 519 520 return 0; 521 out: 522 devvp->v_rdev->si_mountpoint = NULL; 523 if (bp) 524 brelse(bp); 525 if (pribp) 526 brelse(pribp); 527 if (supbp) 528 brelse(supbp); 529 if (needclose) 530 (void)VOP_CLOSE(devvp, FREAD, NOCRED, td); 531 if (isomp) { 532 free((caddr_t)isomp, M_ISOFSMNT); 533 mp->mnt_data = (qaddr_t)0; 534 } 535 return error; 536 } 537 538 /* 539 * unmount system call 540 */ 541 static int 542 cd9660_unmount(mp, mntflags, td) 543 struct mount *mp; 544 int mntflags; 545 struct thread *td; 546 { 547 struct iso_mnt *isomp; 548 int error, flags = 0; 549 550 if (mntflags & MNT_FORCE) 551 flags |= FORCECLOSE; 552 #if 0 553 mntflushbuf(mp, 0); 554 if (mntinvalbuf(mp)) 555 return EBUSY; 556 #endif 557 if ((error = vflush(mp, 0, flags))) 558 return (error); 559 560 isomp = VFSTOISOFS(mp); 561 562 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 563 if (isomp->im_d2l) 564 cd9660_iconv->close(isomp->im_d2l); 565 if (isomp->im_l2d) 566 cd9660_iconv->close(isomp->im_l2d); 567 } 568 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 569 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, td); 570 vrele(isomp->im_devvp); 571 free((caddr_t)isomp, M_ISOFSMNT); 572 mp->mnt_data = (qaddr_t)0; 573 mp->mnt_flag &= ~MNT_LOCAL; 574 return (error); 575 } 576 577 /* 578 * Return root of a filesystem 579 */ 580 static int 581 cd9660_root(mp, vpp) 582 struct mount *mp; 583 struct vnode **vpp; 584 { 585 struct iso_mnt *imp = VFSTOISOFS(mp); 586 struct iso_directory_record *dp = 587 (struct iso_directory_record *)imp->root; 588 ino_t ino = isodirino(dp, imp); 589 590 /* 591 * With RRIP we must use the `.' entry of the root directory. 592 * Simply tell vget, that it's a relocated directory. 593 */ 594 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp, 595 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 596 } 597 598 /* 599 * Get filesystem statistics. 600 */ 601 static int 602 cd9660_statfs(mp, sbp, td) 603 struct mount *mp; 604 struct statfs *sbp; 605 struct thread *td; 606 { 607 struct iso_mnt *isomp; 608 609 isomp = VFSTOISOFS(mp); 610 611 sbp->f_bsize = isomp->logical_block_size; 612 sbp->f_iosize = sbp->f_bsize; /* XXX */ 613 sbp->f_blocks = isomp->volume_space_size; 614 sbp->f_bfree = 0; /* total free blocks */ 615 sbp->f_bavail = 0; /* blocks free for non superuser */ 616 sbp->f_files = 0; /* total files */ 617 sbp->f_ffree = 0; /* free file nodes */ 618 if (sbp != &mp->mnt_stat) { 619 sbp->f_type = mp->mnt_vfc->vfc_typenum; 620 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 621 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 622 } 623 return 0; 624 } 625 626 /* 627 * File handle to vnode 628 * 629 * Have to be really careful about stale file handles: 630 * - check that the inode number is in range 631 * - call iget() to get the locked inode 632 * - check for an unallocated inode (i_mode == 0) 633 * - check that the generation number matches 634 */ 635 636 struct ifid { 637 u_short ifid_len; 638 u_short ifid_pad; 639 int ifid_ino; 640 long ifid_start; 641 }; 642 643 /* ARGSUSED */ 644 static int 645 cd9660_fhtovp(mp, fhp, vpp) 646 struct mount *mp; 647 struct fid *fhp; 648 struct vnode **vpp; 649 { 650 struct ifid *ifhp = (struct ifid *)fhp; 651 struct iso_node *ip; 652 struct vnode *nvp; 653 int error; 654 655 #ifdef ISOFS_DBG 656 printf("fhtovp: ino %d, start %ld\n", 657 ifhp->ifid_ino, ifhp->ifid_start); 658 #endif 659 660 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 661 *vpp = NULLVP; 662 return (error); 663 } 664 ip = VTOI(nvp); 665 if (ip->inode.iso_mode == 0) { 666 vput(nvp); 667 *vpp = NULLVP; 668 return (ESTALE); 669 } 670 *vpp = nvp; 671 return (0); 672 } 673 674 static int 675 cd9660_vget(mp, ino, flags, vpp) 676 struct mount *mp; 677 ino_t ino; 678 int flags; 679 struct vnode **vpp; 680 { 681 682 /* 683 * XXXX 684 * It would be nice if we didn't always set the `relocated' flag 685 * and force the extra read, but I don't want to think about fixing 686 * that right now. 687 */ 688 return (cd9660_vget_internal(mp, ino, flags, vpp, 689 #if 0 690 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 691 #else 692 0, 693 #endif 694 (struct iso_directory_record *)0)); 695 } 696 697 int 698 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir) 699 struct mount *mp; 700 ino_t ino; 701 int flags; 702 struct vnode **vpp; 703 int relocated; 704 struct iso_directory_record *isodir; 705 { 706 struct iso_mnt *imp; 707 struct iso_node *ip; 708 struct buf *bp; 709 struct vnode *vp; 710 struct cdev *dev; 711 int error; 712 713 imp = VFSTOISOFS(mp); 714 dev = imp->im_dev; 715 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0) 716 return (error); 717 if (*vpp != NULL) 718 return (0); 719 720 /* Allocate a new vnode/iso_node. */ 721 if ((error = getnewvnode("isofs", mp, cd9660_vnodeop_p, &vp)) != 0) { 722 *vpp = NULLVP; 723 return (error); 724 } 725 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 726 M_WAITOK | M_ZERO); 727 vp->v_data = ip; 728 ip->i_vnode = vp; 729 ip->i_dev = dev; 730 ip->i_number = ino; 731 732 /* 733 * Check to be sure that it did not show up. We have to put it 734 * on the hash chain as the cleanup from vput expects to find 735 * it there. 736 */ 737 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0 || 738 *vpp != NULL) { 739 cd9660_ihashins(ip); 740 vput(vp); 741 return (error); 742 } 743 744 /* 745 * Put it onto its hash chain and lock it so that other requests for 746 * this inode will block if they arrive while we are sleeping waiting 747 * for old data structures to be purged or for the contents of the 748 * disk portion of this inode to be read. 749 */ 750 cd9660_ihashins(ip); 751 752 if (isodir == 0) { 753 int lbn, off; 754 755 lbn = lblkno(imp, ino); 756 if (lbn >= imp->volume_space_size) { 757 vput(vp); 758 printf("fhtovp: lbn exceed volume space %d\n", lbn); 759 return (ESTALE); 760 } 761 762 off = blkoff(imp, ino); 763 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 764 vput(vp); 765 printf("fhtovp: crosses block boundary %d\n", 766 off + ISO_DIRECTORY_RECORD_SIZE); 767 return (ESTALE); 768 } 769 770 error = bread(imp->im_devvp, 771 lbn << (imp->im_bshift - DEV_BSHIFT), 772 imp->logical_block_size, NOCRED, &bp); 773 if (error) { 774 vput(vp); 775 brelse(bp); 776 printf("fhtovp: bread error %d\n",error); 777 return (error); 778 } 779 isodir = (struct iso_directory_record *)(bp->b_data + off); 780 781 if (off + isonum_711(isodir->length) > 782 imp->logical_block_size) { 783 vput(vp); 784 if (bp != 0) 785 brelse(bp); 786 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 787 off +isonum_711(isodir->length), off, 788 isonum_711(isodir->length)); 789 return (ESTALE); 790 } 791 792 #if 0 793 if (isonum_733(isodir->extent) + 794 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 795 if (bp != 0) 796 brelse(bp); 797 printf("fhtovp: file start miss %d vs %d\n", 798 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 799 ifhp->ifid_start); 800 return (ESTALE); 801 } 802 #endif 803 } else 804 bp = 0; 805 806 ip->i_mnt = imp; 807 ip->i_devvp = imp->im_devvp; 808 VREF(ip->i_devvp); 809 810 if (relocated) { 811 /* 812 * On relocated directories we must 813 * read the `.' entry out of a dir. 814 */ 815 ip->iso_start = ino >> imp->im_bshift; 816 if (bp != 0) 817 brelse(bp); 818 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 819 vput(vp); 820 return (error); 821 } 822 isodir = (struct iso_directory_record *)bp->b_data; 823 } 824 825 ip->iso_extent = isonum_733(isodir->extent); 826 ip->i_size = isonum_733(isodir->size); 827 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 828 829 /* 830 * Setup time stamp, attribute 831 */ 832 vp->v_type = VNON; 833 switch (imp->iso_ftype) { 834 default: /* ISO_FTYPE_9660 */ 835 { 836 struct buf *bp2; 837 int off; 838 if ((imp->im_flags & ISOFSMNT_EXTATT) 839 && (off = isonum_711(isodir->ext_attr_length))) 840 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 841 &bp2); 842 else 843 bp2 = NULL; 844 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 845 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 846 if (bp2) 847 brelse(bp2); 848 break; 849 } 850 case ISO_FTYPE_RRIP: 851 cd9660_rrip_analyze(isodir, ip, imp); 852 break; 853 } 854 855 if (bp != 0) 856 brelse(bp); 857 858 /* 859 * Initialize the associated vnode 860 */ 861 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 862 case VFIFO: 863 vp->v_op = cd9660_fifoop_p; 864 break; 865 case VBLK: 866 vp->v_op = cd9660_specop_p; 867 break; 868 case VCHR: 869 vp->v_op = cd9660_specop_p; 870 vp = addaliasu(vp, ip->inode.iso_rdev); 871 ip->i_vnode = vp; 872 break; 873 default: 874 break; 875 } 876 877 if (ip->iso_extent == imp->root_extent) 878 vp->v_vflag |= VV_ROOT; 879 880 /* 881 * XXX need generation number? 882 */ 883 884 *vpp = vp; 885 return (0); 886 } 887 888 /* 889 * Vnode pointer to File handle 890 */ 891 /* ARGSUSED */ 892 static int 893 cd9660_vptofh(vp, fhp) 894 struct vnode *vp; 895 struct fid *fhp; 896 { 897 struct iso_node *ip = VTOI(vp); 898 struct ifid *ifhp; 899 900 ifhp = (struct ifid *)fhp; 901 ifhp->ifid_len = sizeof(struct ifid); 902 903 ifhp->ifid_ino = ip->i_number; 904 ifhp->ifid_start = ip->iso_start; 905 906 #ifdef ISOFS_DBG 907 printf("vptofh: ino %d, start %ld\n", 908 ifhp->ifid_ino,ifhp->ifid_start); 909 #endif 910 return 0; 911 } 912