cd9660_vfsops.c revision 1.29
1 /* $NetBSD: cd9660_vfsops.c,v 1.29 2005/11/02 12:38:58 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley 8 * by Pace Willisson (pace (at) blitz.com). The Rock Ridge Extension 9 * Support code is derived from software contributed to Berkeley 10 * by Atsushi Murai (amurai (at) spec.co.jp). 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: cd9660_vfsops.c,v 1.29 2005/11/02 12:38:58 yamt Exp $"); 41 42 #if defined(_KERNEL_OPT) 43 #include "opt_compat_netbsd.h" 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/sysctl.h> 48 #include <sys/systm.h> 49 #include <sys/namei.h> 50 #include <sys/proc.h> 51 #include <sys/kernel.h> 52 #include <sys/vnode.h> 53 #include <miscfs/specfs/specdev.h> 54 #include <sys/mount.h> 55 #include <sys/buf.h> 56 #include <sys/file.h> 57 #include <sys/disklabel.h> 58 #include <sys/device.h> 59 #include <sys/ioctl.h> 60 #include <sys/cdio.h> 61 #include <sys/errno.h> 62 #include <sys/malloc.h> 63 #include <sys/pool.h> 64 #include <sys/stat.h> 65 #include <sys/conf.h> 66 #include <sys/dirent.h> 67 68 #include <fs/cd9660/iso.h> 69 #include <fs/cd9660/cd9660_extern.h> 70 #include <fs/cd9660/iso_rrip.h> 71 #include <fs/cd9660/cd9660_node.h> 72 #include <fs/cd9660/cd9660_mount.h> 73 74 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 75 76 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 77 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 78 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 79 80 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 81 &cd9660_vnodeop_opv_desc, 82 &cd9660_specop_opv_desc, 83 &cd9660_fifoop_opv_desc, 84 NULL, 85 }; 86 87 struct vfsops cd9660_vfsops = { 88 MOUNT_CD9660, 89 cd9660_mount, 90 cd9660_start, 91 cd9660_unmount, 92 cd9660_root, 93 cd9660_quotactl, 94 cd9660_statvfs, 95 cd9660_sync, 96 cd9660_vget, 97 cd9660_fhtovp, 98 cd9660_vptofh, 99 cd9660_init, 100 cd9660_reinit, 101 cd9660_done, 102 cd9660_mountroot, 103 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 104 vfs_stdextattrctl, 105 cd9660_vnodeopv_descs, 106 }; 107 VFS_ATTACH(cd9660_vfsops); 108 109 static const struct genfs_ops cd9660_genfsops = { 110 .gop_size = genfs_size, 111 }; 112 113 /* 114 * Called by vfs_mountroot when iso is going to be mounted as root. 115 * 116 * Name is updated by mount(8) after booting. 117 */ 118 #define ROOTNAME "root_device" 119 120 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 121 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 122 struct proc *p, struct iso_args *argp); 123 124 int 125 cd9660_mountroot() 126 { 127 struct mount *mp; 128 struct proc *p = curproc; /* XXX */ 129 int error; 130 struct iso_args args; 131 132 if (root_device->dv_class != DV_DISK) 133 return (ENODEV); 134 135 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 136 != 0) { 137 vrele(rootvp); 138 return (error); 139 } 140 141 args.flags = ISOFSMNT_ROOT; 142 if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) { 143 mp->mnt_op->vfs_refcount--; 144 vfs_unbusy(mp); 145 free(mp, M_MOUNT); 146 return (error); 147 } 148 simple_lock(&mountlist_slock); 149 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 150 simple_unlock(&mountlist_slock); 151 (void)cd9660_statvfs(mp, &mp->mnt_stat, p); 152 vfs_unbusy(mp); 153 return (0); 154 } 155 156 /* 157 * VFS Operations. 158 * 159 * mount system call 160 */ 161 int 162 cd9660_mount(mp, path, data, ndp, p) 163 struct mount *mp; 164 const char *path; 165 void *data; 166 struct nameidata *ndp; 167 struct proc *p; 168 { 169 struct vnode *devvp; 170 struct iso_args args; 171 int error; 172 struct iso_mnt *imp = VFSTOISOFS(mp); 173 174 if (mp->mnt_flag & MNT_GETARGS) { 175 if (imp == NULL) 176 return EIO; 177 args.fspec = NULL; 178 args.flags = imp->im_flags; 179 return copyout(&args, data, sizeof(args)); 180 } 181 error = copyin(data, &args, sizeof (struct iso_args)); 182 if (error) 183 return (error); 184 185 if ((mp->mnt_flag & MNT_RDONLY) == 0) 186 return (EROFS); 187 188 if ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 189 return EINVAL; 190 191 /* 192 * Not an update, or updating the name: look up the name 193 * and verify that it refers to a sensible block device. 194 */ 195 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 196 if ((error = namei(ndp)) != 0) 197 return (error); 198 devvp = ndp->ni_vp; 199 200 if (devvp->v_type != VBLK) { 201 vrele(devvp); 202 return ENOTBLK; 203 } 204 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 205 vrele(devvp); 206 return ENXIO; 207 } 208 /* 209 * If mount by non-root, then verify that user has necessary 210 * permissions on the device. 211 */ 212 if (p->p_ucred->cr_uid != 0) { 213 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 214 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 215 VOP_UNLOCK(devvp, 0); 216 if (error) { 217 vrele(devvp); 218 return (error); 219 } 220 } 221 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 222 /* 223 * Disallow multiple mounts of the same device. 224 * Disallow mounting of a device that is currently in use 225 * (except for root, which might share swap device for 226 * miniroot). 227 */ 228 error = vfs_mountedon(devvp); 229 if (error) 230 goto fail; 231 if (vcount(devvp) > 1 && devvp != rootvp) { 232 error = EBUSY; 233 goto fail; 234 } 235 error = VOP_OPEN(devvp, FREAD, FSCRED, p); 236 if (error) 237 goto fail; 238 error = iso_mountfs(devvp, mp, p, &args); 239 if (error) { 240 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 241 (void)VOP_CLOSE(devvp, FREAD, NOCRED, p); 242 VOP_UNLOCK(devvp, 0); 243 goto fail; 244 } 245 } else { 246 vrele(devvp); 247 if (devvp != imp->im_devvp) 248 return (EINVAL); /* needs translation */ 249 } 250 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 251 mp, p); 252 253 fail: 254 vrele(devvp); 255 return (error); 256 } 257 258 /* 259 * Make a mount point from a volume descriptor 260 */ 261 static int 262 iso_makemp(isomp, bp, ea_len) 263 struct iso_mnt *isomp; 264 struct buf *bp; 265 int *ea_len; 266 { 267 struct iso_primary_descriptor *pri; 268 int logical_block_size; 269 struct iso_directory_record *rootp; 270 271 pri = (struct iso_primary_descriptor *)bp->b_data; 272 273 logical_block_size = isonum_723 (pri->logical_block_size); 274 275 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 276 || (logical_block_size & (logical_block_size - 1)) != 0) 277 return -1; 278 279 rootp = (struct iso_directory_record *)pri->root_directory_record; 280 281 isomp->logical_block_size = logical_block_size; 282 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 283 memcpy(isomp->root, rootp, sizeof(isomp->root)); 284 isomp->root_extent = isonum_733 (rootp->extent); 285 isomp->root_size = isonum_733 (rootp->size); 286 isomp->im_joliet_level = 0; 287 288 isomp->im_bmask = logical_block_size - 1; 289 isomp->im_bshift = 0; 290 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 291 isomp->im_bshift++; 292 293 if (ea_len != NULL) 294 *ea_len = isonum_711(rootp->ext_attr_length); 295 296 return 0; 297 } 298 299 /* 300 * Common code for mount and mountroot 301 */ 302 static int 303 iso_mountfs(devvp, mp, p, argp) 304 struct vnode *devvp; 305 struct mount *mp; 306 struct proc *p; 307 struct iso_args *argp; 308 { 309 struct iso_mnt *isomp = (struct iso_mnt *)0; 310 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 311 dev_t dev = devvp->v_rdev; 312 int error = EINVAL; 313 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 314 int iso_bsize; 315 int iso_blknum; 316 int joliet_level; 317 struct iso_volume_descriptor *vdp; 318 struct iso_supplementary_descriptor *sup; 319 int sess = 0; 320 int ext_attr_length; 321 struct disklabel label; 322 323 if (!ronly) 324 return EROFS; 325 326 /* Flush out any old buffers remaining from a previous use. */ 327 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 328 return (error); 329 330 /* This is the "logical sector size". The standard says this 331 * should be 2048 or the physical sector size on the device, 332 * whichever is greater. For now, we'll just use a constant. 333 */ 334 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 335 336 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, p); 337 if (!error && 338 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 339 /* XXX more sanity checks? */ 340 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 341 } else { 342 /* fallback to old method */ 343 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, p); 344 if (error) 345 sess = 0; /* never mind */ 346 } 347 #ifdef ISO_DEBUG 348 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 349 #endif 350 351 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 352 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 353 iso_bsize, NOCRED, &bp)) != 0) 354 goto out; 355 356 vdp = (struct iso_volume_descriptor *)bp->b_data; 357 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 358 error = EINVAL; 359 goto out; 360 } 361 362 switch (isonum_711(vdp->type)) { 363 case ISO_VD_PRIMARY: 364 if (pribp == NULL) { 365 pribp = bp; 366 bp = NULL; 367 } 368 break; 369 370 case ISO_VD_SUPPLEMENTARY: 371 if (supbp == NULL) { 372 supbp = bp; 373 bp = NULL; 374 } 375 break; 376 377 default: 378 break; 379 } 380 381 if (isonum_711 (vdp->type) == ISO_VD_END) { 382 brelse(bp); 383 bp = NULL; 384 break; 385 } 386 387 if (bp != NULL) { 388 brelse(bp); 389 bp = NULL; 390 } 391 } 392 393 if (pribp == NULL) { 394 error = EINVAL; 395 goto out; 396 } 397 398 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 399 memset(isomp, 0, sizeof *isomp); 400 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 401 error = EINVAL; 402 goto out; 403 } 404 405 isomp->volume_space_size += sess; 406 407 pribp->b_flags |= B_AGE; 408 brelse(pribp); 409 pribp = NULL; 410 411 mp->mnt_data = isomp; 412 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 413 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 414 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 415 mp->mnt_stat.f_namemax = MAXNAMLEN; 416 mp->mnt_flag |= MNT_LOCAL; 417 mp->mnt_dev_bshift = iso_bsize; 418 mp->mnt_fs_bshift = isomp->im_bshift; 419 isomp->im_mountp = mp; 420 isomp->im_dev = dev; 421 isomp->im_devvp = devvp; 422 423 devvp->v_specmountpoint = mp; 424 425 /* Check the Rock Ridge Extension support */ 426 if (!(argp->flags & ISOFSMNT_NORRIP)) { 427 struct iso_directory_record *rootp; 428 429 if ((error = bread(isomp->im_devvp, 430 (isomp->root_extent + ext_attr_length) << 431 (isomp->im_bshift - DEV_BSHIFT), 432 isomp->logical_block_size, NOCRED, 433 &bp)) != 0) 434 goto out; 435 436 rootp = (struct iso_directory_record *)bp->b_data; 437 438 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 439 argp->flags |= ISOFSMNT_NORRIP; 440 } else { 441 argp->flags &= ~ISOFSMNT_GENS; 442 } 443 444 /* 445 * The contents are valid, 446 * but they will get reread as part of another vnode, so... 447 */ 448 bp->b_flags |= B_AGE; 449 brelse(bp); 450 bp = NULL; 451 } 452 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 453 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 454 455 if (isomp->im_flags & ISOFSMNT_GENS) 456 isomp->iso_ftype = ISO_FTYPE_9660; 457 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 458 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 459 if (argp->flags & ISOFSMNT_NOCASETRANS) 460 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 461 } else 462 isomp->iso_ftype = ISO_FTYPE_RRIP; 463 464 /* Check the Joliet Extension support */ 465 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 466 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 467 supbp != NULL) { 468 joliet_level = 0; 469 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 470 471 if ((isonum_711(sup->flags) & 1) == 0) { 472 if (memcmp(sup->escape, "%/@", 3) == 0) 473 joliet_level = 1; 474 if (memcmp(sup->escape, "%/C", 3) == 0) 475 joliet_level = 2; 476 if (memcmp(sup->escape, "%/E", 3) == 0) 477 joliet_level = 3; 478 } 479 if (joliet_level != 0) { 480 if (iso_makemp(isomp, supbp, NULL) == -1) { 481 error = EINVAL; 482 goto out; 483 } 484 isomp->im_joliet_level = joliet_level; 485 } 486 } 487 488 if (supbp != NULL) { 489 brelse(supbp); 490 supbp = NULL; 491 } 492 493 return 0; 494 out: 495 if (bp) 496 brelse(bp); 497 if (pribp) 498 brelse(pribp); 499 if (supbp) 500 brelse(supbp); 501 if (isomp) { 502 free(isomp, M_ISOFSMNT); 503 mp->mnt_data = NULL; 504 } 505 return error; 506 } 507 508 /* 509 * Make a filesystem operational. 510 * Nothing to do at the moment. 511 */ 512 /* ARGSUSED */ 513 int 514 cd9660_start(mp, flags, p) 515 struct mount *mp; 516 int flags; 517 struct proc *p; 518 { 519 return 0; 520 } 521 522 /* 523 * unmount system call 524 */ 525 int 526 cd9660_unmount(mp, mntflags, p) 527 struct mount *mp; 528 int mntflags; 529 struct proc *p; 530 { 531 struct iso_mnt *isomp; 532 int error, flags = 0; 533 534 if (mntflags & MNT_FORCE) 535 flags |= FORCECLOSE; 536 #if 0 537 mntflushbuf(mp, 0); 538 if (mntinvalbuf(mp)) 539 return EBUSY; 540 #endif 541 if ((error = vflush(mp, NULLVP, flags)) != 0) 542 return (error); 543 544 isomp = VFSTOISOFS(mp); 545 546 #ifdef ISODEVMAP 547 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 548 iso_dunmap(isomp->im_dev); 549 #endif 550 551 if (isomp->im_devvp->v_type != VBAD) 552 isomp->im_devvp->v_specmountpoint = NULL; 553 554 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 555 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 556 vput(isomp->im_devvp); 557 free(isomp, M_ISOFSMNT); 558 mp->mnt_data = NULL; 559 mp->mnt_flag &= ~MNT_LOCAL; 560 return (error); 561 } 562 563 /* 564 * Return root of a filesystem 565 */ 566 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, vpp, 581 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 582 } 583 584 /* 585 * Do operations associated with quotas, not supported 586 */ 587 /* ARGSUSED */ 588 int 589 cd9660_quotactl(mp, cmd, uid, arg, p) 590 struct mount *mp; 591 int cmd; 592 uid_t uid; 593 void *arg; 594 struct proc *p; 595 { 596 597 return (EOPNOTSUPP); 598 } 599 600 /* 601 * Get file system statistics. 602 */ 603 int 604 cd9660_statvfs(mp, sbp, p) 605 struct mount *mp; 606 struct statvfs *sbp; 607 struct proc *p; 608 { 609 struct iso_mnt *isomp; 610 611 isomp = VFSTOISOFS(mp); 612 613 sbp->f_bsize = isomp->logical_block_size; 614 sbp->f_frsize = sbp->f_bsize; 615 sbp->f_iosize = sbp->f_bsize; /* XXX */ 616 sbp->f_blocks = isomp->volume_space_size; 617 sbp->f_bfree = 0; /* total free blocks */ 618 sbp->f_bavail = 0; /* blocks free for non superuser */ 619 sbp->f_bresvd = 0; /* total reserved blocks */ 620 sbp->f_files = 0; /* total files */ 621 sbp->f_ffree = 0; /* free file nodes */ 622 sbp->f_favail = 0; /* free file nodes for non superuser */ 623 sbp->f_fresvd = 0; /* reserved file nodes */ 624 copy_statvfs_info(sbp, mp); 625 /* Use the first spare for flags: */ 626 sbp->f_spare[0] = isomp->im_flags; 627 return 0; 628 } 629 630 /* ARGSUSED */ 631 int 632 cd9660_sync(mp, waitfor, cred, p) 633 struct mount *mp; 634 int waitfor; 635 struct ucred *cred; 636 struct proc *p; 637 { 638 return (0); 639 } 640 641 /* 642 * File handle to vnode 643 * 644 * Have to be really careful about stale file handles: 645 * - check that the inode number is in range 646 * - call iget() to get the locked inode 647 * - check for an unallocated inode (i_mode == 0) 648 * - check that the generation number matches 649 */ 650 651 struct ifid { 652 ushort ifid_len; 653 ushort ifid_pad; 654 int ifid_ino; 655 long ifid_start; 656 }; 657 658 /* ARGSUSED */ 659 int 660 cd9660_fhtovp(mp, fhp, vpp) 661 struct mount *mp; 662 struct fid *fhp; 663 struct vnode **vpp; 664 { 665 struct ifid *ifhp = (struct ifid *)fhp; 666 struct iso_node *ip; 667 struct vnode *nvp; 668 int error; 669 670 #ifdef ISOFS_DBG 671 printf("fhtovp: ino %d, start %ld\n", 672 ifhp->ifid_ino, ifhp->ifid_start); 673 #endif 674 675 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 676 *vpp = NULLVP; 677 return (error); 678 } 679 ip = VTOI(nvp); 680 if (ip->inode.iso_mode == 0) { 681 vput(nvp); 682 *vpp = NULLVP; 683 return (ESTALE); 684 } 685 *vpp = nvp; 686 return (0); 687 } 688 689 int 690 cd9660_vget(mp, ino, vpp) 691 struct mount *mp; 692 ino_t ino; 693 struct vnode **vpp; 694 { 695 696 /* 697 * XXXX 698 * It would be nice if we didn't always set the `relocated' flag 699 * and force the extra read, but I don't want to think about fixing 700 * that right now. 701 */ 702 return (cd9660_vget_internal(mp, ino, vpp, 703 #if 0 704 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 705 #else 706 0, 707 #endif 708 NULL)); 709 } 710 711 int 712 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 713 struct mount *mp; 714 ino_t ino; 715 struct vnode **vpp; 716 int relocated; 717 struct iso_directory_record *isodir; 718 { 719 struct iso_mnt *imp; 720 struct iso_node *ip; 721 #ifdef ISODEVMAP 722 struct iso_dnode *dp; 723 #endif 724 struct buf *bp; 725 struct vnode *vp, *nvp; 726 dev_t dev; 727 int error; 728 729 imp = VFSTOISOFS(mp); 730 dev = imp->im_dev; 731 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 732 return (0); 733 734 /* Allocate a new vnode/iso_node. */ 735 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 736 *vpp = NULLVP; 737 return (error); 738 } 739 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 740 memset(ip, 0, sizeof(struct iso_node)); 741 vp->v_data = ip; 742 ip->i_vnode = vp; 743 ip->i_dev = dev; 744 ip->i_number = ino; 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), 843 NULL, &bp2); 844 else 845 bp2 = NULL; 846 cd9660_defattr(isodir, ip, bp2); 847 cd9660_deftstamp(isodir, ip, bp2); 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 VCHR: 868 case VBLK: 869 /* 870 * if device, look at device number table for translation 871 */ 872 #ifdef ISODEVMAP 873 if ((dp = iso_dmap(dev, ino, 0)) != NULL) 874 ip->inode.iso_rdev = dp->d_dev; 875 #endif 876 vp->v_op = cd9660_specop_p; 877 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 878 /* 879 * Discard unneeded vnode, but save its iso_node. 880 * Note that the lock is carried over in the iso_node 881 * to the replacement vnode. 882 */ 883 nvp->v_data = vp->v_data; 884 vp->v_data = NULL; 885 VOP_UNLOCK(vp, 0); 886 vp->v_op = spec_vnodeop_p; 887 vrele(vp); 888 vgone(vp); 889 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 890 /* 891 * Reinitialize aliased inode. 892 */ 893 vp = nvp; 894 ip->i_vnode = vp; 895 } 896 break; 897 case VLNK: 898 case VNON: 899 case VSOCK: 900 case VDIR: 901 case VBAD: 902 break; 903 case VREG: 904 uvm_vnp_setsize(vp, ip->i_size); 905 break; 906 } 907 908 if (ip->iso_extent == imp->root_extent) 909 vp->v_flag |= VROOT; 910 911 /* 912 * XXX need generation number? 913 */ 914 915 genfs_node_init(vp, &cd9660_genfsops); 916 *vpp = vp; 917 return (0); 918 } 919 920 /* 921 * Vnode pointer to File handle 922 */ 923 /* ARGSUSED */ 924 int 925 cd9660_vptofh(vp, fhp) 926 struct vnode *vp; 927 struct fid *fhp; 928 { 929 struct iso_node *ip = VTOI(vp); 930 struct ifid *ifhp; 931 932 ifhp = (struct ifid *)fhp; 933 ifhp->ifid_len = sizeof(struct ifid); 934 935 ifhp->ifid_ino = ip->i_number; 936 ifhp->ifid_start = ip->iso_start; 937 938 #ifdef ISOFS_DBG 939 printf("vptofh: ino %d, start %ld\n", 940 ifhp->ifid_ino,ifhp->ifid_start); 941 #endif 942 return 0; 943 } 944 945 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 946 { 947 948 sysctl_createv(clog, 0, NULL, NULL, 949 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 950 NULL, 0, NULL, 0, 951 CTL_VFS, CTL_EOL); 952 sysctl_createv(clog, 0, NULL, NULL, 953 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 954 SYSCTL_DESCR("ISO-9660 file system"), 955 NULL, 0, NULL, 0, 956 CTL_VFS, 14, CTL_EOL); 957 958 sysctl_createv(clog, 0, NULL, NULL, 959 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 960 CTLTYPE_INT, "utf8_joliet", 961 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 962 NULL, 0, &cd9660_utf8_joliet, 0, 963 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 964 965 } 966
Indexes created Wed Oct 22 00:09:40 GMT 2025