cd9660_vfsops.c revision 1.36
1 /* $NetBSD: cd9660_vfsops.c,v 1.36 2006/10/12 01:32:10 christos 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 1.36 2006/10/12 01:32:10 christos 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 #include <sys/kauth.h> 68 69 #include <fs/cd9660/iso.h> 70 #include <fs/cd9660/cd9660_extern.h> 71 #include <fs/cd9660/iso_rrip.h> 72 #include <fs/cd9660/cd9660_node.h> 73 #include <fs/cd9660/cd9660_mount.h> 74 75 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 76 77 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 78 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 79 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 80 81 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 82 &cd9660_vnodeop_opv_desc, 83 &cd9660_specop_opv_desc, 84 &cd9660_fifoop_opv_desc, 85 NULL, 86 }; 87 88 struct vfsops cd9660_vfsops = { 89 MOUNT_CD9660, 90 cd9660_mount, 91 cd9660_start, 92 cd9660_unmount, 93 cd9660_root, 94 cd9660_quotactl, 95 cd9660_statvfs, 96 cd9660_sync, 97 cd9660_vget, 98 cd9660_fhtovp, 99 cd9660_vptofh, 100 cd9660_init, 101 cd9660_reinit, 102 cd9660_done, 103 cd9660_mountroot, 104 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 105 vfs_stdextattrctl, 106 cd9660_vnodeopv_descs, 107 0, /* refcount */ 108 { NULL, NULL } /* list */ 109 }; 110 VFS_ATTACH(cd9660_vfsops); 111 112 static const struct genfs_ops cd9660_genfsops = { 113 .gop_size = genfs_size, 114 }; 115 116 /* 117 * Called by vfs_mountroot when iso is going to be mounted as root. 118 * 119 * Name is updated by mount(8) after booting. 120 */ 121 #define ROOTNAME "root_device" 122 123 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 124 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 125 struct lwp *l, struct iso_args *argp); 126 127 int 128 cd9660_mountroot() 129 { 130 struct mount *mp; 131 struct lwp *l = curlwp; /* XXX */ 132 int error; 133 struct iso_args args; 134 135 if (device_class(root_device) != DV_DISK) 136 return (ENODEV); 137 138 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 139 != 0) { 140 vrele(rootvp); 141 return (error); 142 } 143 144 args.flags = ISOFSMNT_ROOT; 145 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 146 mp->mnt_op->vfs_refcount--; 147 vfs_unbusy(mp); 148 free(mp, M_MOUNT); 149 return (error); 150 } 151 simple_lock(&mountlist_slock); 152 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 153 simple_unlock(&mountlist_slock); 154 (void)cd9660_statvfs(mp, &mp->mnt_stat, l); 155 vfs_unbusy(mp); 156 return (0); 157 } 158 159 /* 160 * VFS Operations. 161 * 162 * mount system call 163 */ 164 int 165 cd9660_mount(mp, path, data, ndp, l) 166 struct mount *mp; 167 const char *path; 168 void *data; 169 struct nameidata *ndp; 170 struct lwp *l; 171 { 172 struct vnode *devvp; 173 struct iso_args args; 174 int error; 175 struct iso_mnt *imp = VFSTOISOFS(mp); 176 177 if (mp->mnt_flag & MNT_GETARGS) { 178 if (imp == NULL) 179 return EIO; 180 args.fspec = NULL; 181 args.flags = imp->im_flags; 182 return copyout(&args, data, sizeof(args)); 183 } 184 error = copyin(data, &args, sizeof (struct iso_args)); 185 if (error) 186 return (error); 187 188 if ((mp->mnt_flag & MNT_RDONLY) == 0) 189 return (EROFS); 190 191 if ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 192 return EINVAL; 193 194 /* 195 * Not an update, or updating the name: look up the name 196 * and verify that it refers to a sensible block device. 197 */ 198 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 199 if ((error = namei(ndp)) != 0) 200 return (error); 201 devvp = ndp->ni_vp; 202 203 if (devvp->v_type != VBLK) { 204 vrele(devvp); 205 return ENOTBLK; 206 } 207 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 208 vrele(devvp); 209 return ENXIO; 210 } 211 /* 212 * If mount by non-root, then verify that user has necessary 213 * permissions on the device. 214 */ 215 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) { 216 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 217 error = VOP_ACCESS(devvp, VREAD, l->l_cred, l); 218 VOP_UNLOCK(devvp, 0); 219 if (error) { 220 vrele(devvp); 221 return (error); 222 } 223 } 224 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 225 /* 226 * Disallow multiple mounts of the same device. 227 * Disallow mounting of a device that is currently in use 228 * (except for root, which might share swap device for 229 * miniroot). 230 */ 231 error = vfs_mountedon(devvp); 232 if (error) 233 goto fail; 234 if (vcount(devvp) > 1 && devvp != rootvp) { 235 error = EBUSY; 236 goto fail; 237 } 238 error = VOP_OPEN(devvp, FREAD, FSCRED, l); 239 if (error) 240 goto fail; 241 error = iso_mountfs(devvp, mp, l, &args); 242 if (error) { 243 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 244 (void)VOP_CLOSE(devvp, FREAD, NOCRED, l); 245 VOP_UNLOCK(devvp, 0); 246 goto fail; 247 } 248 } else { 249 vrele(devvp); 250 if (devvp != imp->im_devvp) 251 return (EINVAL); /* needs translation */ 252 } 253 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 254 mp, l); 255 256 fail: 257 vrele(devvp); 258 return (error); 259 } 260 261 /* 262 * Make a mount point from a volume descriptor 263 */ 264 static int 265 iso_makemp(isomp, bp, ea_len) 266 struct iso_mnt *isomp; 267 struct buf *bp; 268 int *ea_len; 269 { 270 struct iso_primary_descriptor *pri; 271 int logical_block_size; 272 struct iso_directory_record *rootp; 273 274 pri = (struct iso_primary_descriptor *)bp->b_data; 275 276 logical_block_size = isonum_723 (pri->logical_block_size); 277 278 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 279 || (logical_block_size & (logical_block_size - 1)) != 0) 280 return -1; 281 282 rootp = (struct iso_directory_record *)pri->root_directory_record; 283 284 isomp->logical_block_size = logical_block_size; 285 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 286 memcpy(isomp->root, rootp, sizeof(isomp->root)); 287 isomp->root_extent = isonum_733 (rootp->extent); 288 isomp->root_size = isonum_733 (rootp->size); 289 isomp->im_joliet_level = 0; 290 291 isomp->im_bmask = logical_block_size - 1; 292 isomp->im_bshift = 0; 293 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 294 isomp->im_bshift++; 295 296 if (ea_len != NULL) 297 *ea_len = isonum_711(rootp->ext_attr_length); 298 299 return 0; 300 } 301 302 /* 303 * Common code for mount and mountroot 304 */ 305 static int 306 iso_mountfs(devvp, mp, l, argp) 307 struct vnode *devvp; 308 struct mount *mp; 309 struct lwp *l; 310 struct iso_args *argp; 311 { 312 struct iso_mnt *isomp = (struct iso_mnt *)0; 313 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 314 dev_t dev = devvp->v_rdev; 315 int error = EINVAL; 316 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 317 int iso_bsize; 318 int iso_blknum; 319 int joliet_level; 320 struct iso_volume_descriptor *vdp; 321 struct iso_supplementary_descriptor *sup; 322 int sess = 0; 323 int ext_attr_length; 324 struct disklabel label; 325 326 if (!ronly) 327 return EROFS; 328 329 /* Flush out any old buffers remaining from a previous use. */ 330 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 331 return (error); 332 333 /* This is the "logical sector size". The standard says this 334 * should be 2048 or the physical sector size on the device, 335 * whichever is greater. For now, we'll just use a constant. 336 */ 337 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 338 339 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, l); 340 if (!error && 341 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 342 /* XXX more sanity checks? */ 343 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 344 } else { 345 /* fallback to old method */ 346 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, l); 347 if (error) 348 sess = 0; /* never mind */ 349 } 350 #ifdef ISO_DEBUG 351 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 352 #endif 353 354 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 355 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 356 iso_bsize, NOCRED, &bp)) != 0) 357 goto out; 358 359 vdp = (struct iso_volume_descriptor *)bp->b_data; 360 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 361 error = EINVAL; 362 goto out; 363 } 364 365 switch (isonum_711(vdp->type)) { 366 case ISO_VD_PRIMARY: 367 if (pribp == NULL) { 368 pribp = bp; 369 bp = NULL; 370 } 371 break; 372 373 case ISO_VD_SUPPLEMENTARY: 374 if (supbp == NULL) { 375 supbp = bp; 376 bp = NULL; 377 } 378 break; 379 380 default: 381 break; 382 } 383 384 if (isonum_711 (vdp->type) == ISO_VD_END) { 385 brelse(bp); 386 bp = NULL; 387 break; 388 } 389 390 if (bp != NULL) { 391 brelse(bp); 392 bp = NULL; 393 } 394 } 395 396 if (pribp == NULL) { 397 error = EINVAL; 398 goto out; 399 } 400 401 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 402 memset(isomp, 0, sizeof *isomp); 403 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 404 error = EINVAL; 405 goto out; 406 } 407 408 isomp->volume_space_size += sess; 409 410 pribp->b_flags |= B_AGE; 411 brelse(pribp); 412 pribp = NULL; 413 414 mp->mnt_data = isomp; 415 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 416 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 417 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 418 mp->mnt_stat.f_namemax = MAXNAMLEN; 419 mp->mnt_flag |= MNT_LOCAL; 420 mp->mnt_dev_bshift = iso_bsize; 421 mp->mnt_fs_bshift = isomp->im_bshift; 422 isomp->im_mountp = mp; 423 isomp->im_dev = dev; 424 isomp->im_devvp = devvp; 425 426 devvp->v_specmountpoint = mp; 427 428 /* Check the Rock Ridge Extension support */ 429 if (!(argp->flags & ISOFSMNT_NORRIP)) { 430 struct iso_directory_record *rootp; 431 432 if ((error = bread(isomp->im_devvp, 433 (isomp->root_extent + ext_attr_length) << 434 (isomp->im_bshift - DEV_BSHIFT), 435 isomp->logical_block_size, NOCRED, 436 &bp)) != 0) 437 goto out; 438 439 rootp = (struct iso_directory_record *)bp->b_data; 440 441 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 442 argp->flags |= ISOFSMNT_NORRIP; 443 } else { 444 argp->flags &= ~ISOFSMNT_GENS; 445 } 446 447 /* 448 * The contents are valid, 449 * but they will get reread as part of another vnode, so... 450 */ 451 bp->b_flags |= B_AGE; 452 brelse(bp); 453 bp = NULL; 454 } 455 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 456 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 457 458 if (isomp->im_flags & ISOFSMNT_GENS) 459 isomp->iso_ftype = ISO_FTYPE_9660; 460 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 461 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 462 if (argp->flags & ISOFSMNT_NOCASETRANS) 463 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 464 } else 465 isomp->iso_ftype = ISO_FTYPE_RRIP; 466 467 /* Check the Joliet Extension support */ 468 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 469 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 470 supbp != NULL) { 471 joliet_level = 0; 472 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 473 474 if ((isonum_711(sup->flags) & 1) == 0) { 475 if (memcmp(sup->escape, "%/@", 3) == 0) 476 joliet_level = 1; 477 if (memcmp(sup->escape, "%/C", 3) == 0) 478 joliet_level = 2; 479 if (memcmp(sup->escape, "%/E", 3) == 0) 480 joliet_level = 3; 481 } 482 if (joliet_level != 0) { 483 if (iso_makemp(isomp, supbp, NULL) == -1) { 484 error = EINVAL; 485 goto out; 486 } 487 isomp->im_joliet_level = joliet_level; 488 } 489 } 490 491 if (supbp != NULL) { 492 brelse(supbp); 493 supbp = NULL; 494 } 495 496 return 0; 497 out: 498 if (bp) 499 brelse(bp); 500 if (pribp) 501 brelse(pribp); 502 if (supbp) 503 brelse(supbp); 504 if (isomp) { 505 free(isomp, M_ISOFSMNT); 506 mp->mnt_data = NULL; 507 } 508 return error; 509 } 510 511 /* 512 * Make a filesystem operational. 513 * Nothing to do at the moment. 514 */ 515 /* ARGSUSED */ 516 int 517 cd9660_start(struct mount *mp __unused, int flags __unused, 518 struct lwp *l __unused) 519 { 520 return 0; 521 } 522 523 /* 524 * unmount system call 525 */ 526 int 527 cd9660_unmount(mp, mntflags, l) 528 struct mount *mp; 529 int mntflags; 530 struct lwp *l; 531 { 532 struct iso_mnt *isomp; 533 int error, flags = 0; 534 535 if (mntflags & MNT_FORCE) 536 flags |= FORCECLOSE; 537 #if 0 538 mntflushbuf(mp, 0); 539 if (mntinvalbuf(mp)) 540 return EBUSY; 541 #endif 542 if ((error = vflush(mp, NULLVP, flags)) != 0) 543 return (error); 544 545 isomp = VFSTOISOFS(mp); 546 547 #ifdef ISODEVMAP 548 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 549 iso_dunmap(isomp->im_dev); 550 #endif 551 552 if (isomp->im_devvp->v_type != VBAD) 553 isomp->im_devvp->v_specmountpoint = NULL; 554 555 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 556 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, l); 557 vput(isomp->im_devvp); 558 free(isomp, M_ISOFSMNT); 559 mp->mnt_data = NULL; 560 mp->mnt_flag &= ~MNT_LOCAL; 561 return (error); 562 } 563 564 /* 565 * Return root of a filesystem 566 */ 567 int 568 cd9660_root(mp, vpp) 569 struct mount *mp; 570 struct vnode **vpp; 571 { 572 struct iso_mnt *imp = VFSTOISOFS(mp); 573 struct iso_directory_record *dp = 574 (struct iso_directory_record *)imp->root; 575 ino_t ino = isodirino(dp, imp); 576 577 /* 578 * With RRIP we must use the `.' entry of the root directory. 579 * Simply tell vget, that it's a relocated directory. 580 */ 581 return (cd9660_vget_internal(mp, ino, vpp, 582 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 583 } 584 585 /* 586 * Do operations associated with quotas, not supported 587 */ 588 /* ARGSUSED */ 589 int 590 cd9660_quotactl( 591 struct mount *mp __unused, 592 int cmd __unused, 593 uid_t uid __unused, 594 void *arg __unused, 595 struct lwp *l __unused) 596 { 597 598 return (EOPNOTSUPP); 599 } 600 601 /* 602 * Get file system statistics. 603 */ 604 int 605 cd9660_statvfs( 606 struct mount *mp, 607 struct statvfs *sbp, 608 struct lwp *l __unused) 609 { 610 struct iso_mnt *isomp; 611 612 isomp = VFSTOISOFS(mp); 613 614 sbp->f_bsize = isomp->logical_block_size; 615 sbp->f_frsize = sbp->f_bsize; 616 sbp->f_iosize = sbp->f_bsize; /* XXX */ 617 sbp->f_blocks = isomp->volume_space_size; 618 sbp->f_bfree = 0; /* total free blocks */ 619 sbp->f_bavail = 0; /* blocks free for non superuser */ 620 sbp->f_bresvd = 0; /* total reserved blocks */ 621 sbp->f_files = 0; /* total files */ 622 sbp->f_ffree = 0; /* free file nodes */ 623 sbp->f_favail = 0; /* free file nodes for non superuser */ 624 sbp->f_fresvd = 0; /* reserved file nodes */ 625 copy_statvfs_info(sbp, mp); 626 /* Use the first spare for flags: */ 627 sbp->f_spare[0] = isomp->im_flags; 628 return 0; 629 } 630 631 /* ARGSUSED */ 632 int 633 cd9660_sync( 634 struct mount *mp __unused, 635 int waitfor __unused, 636 kauth_cred_t cred __unused, 637 struct lwp *l __unused) 638 { 639 return (0); 640 } 641 642 /* 643 * File handle to vnode 644 * 645 * Have to be really careful about stale file handles: 646 * - check that the inode number is in range 647 * - call iget() to get the locked inode 648 * - check for an unallocated inode (i_mode == 0) 649 * - check that the generation number matches 650 */ 651 652 struct ifid { 653 ushort ifid_len; 654 ushort ifid_pad; 655 int ifid_ino; 656 long ifid_start; 657 }; 658 659 /* ARGSUSED */ 660 int 661 cd9660_fhtovp(mp, fhp, vpp) 662 struct mount *mp; 663 struct fid *fhp; 664 struct vnode **vpp; 665 { 666 struct ifid ifh; 667 struct iso_node *ip; 668 struct vnode *nvp; 669 int error; 670 671 if (fhp->fid_len != sizeof(ifh)) 672 return EINVAL; 673 674 memcpy(&ifh, fhp, sizeof(ifh)); 675 #ifdef ISOFS_DBG 676 printf("fhtovp: ino %d, start %ld\n", 677 ifh.ifid_ino, ifh.ifid_start); 678 #endif 679 680 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 681 *vpp = NULLVP; 682 return (error); 683 } 684 ip = VTOI(nvp); 685 if (ip->inode.iso_mode == 0) { 686 vput(nvp); 687 *vpp = NULLVP; 688 return (ESTALE); 689 } 690 *vpp = nvp; 691 return (0); 692 } 693 694 int 695 cd9660_vget(mp, ino, vpp) 696 struct mount *mp; 697 ino_t ino; 698 struct vnode **vpp; 699 { 700 701 /* 702 * XXXX 703 * It would be nice if we didn't always set the `relocated' flag 704 * and force the extra read, but I don't want to think about fixing 705 * that right now. 706 */ 707 return (cd9660_vget_internal(mp, ino, vpp, 708 #if 0 709 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 710 #else 711 0, 712 #endif 713 NULL)); 714 } 715 716 int 717 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 718 struct mount *mp; 719 ino_t ino; 720 struct vnode **vpp; 721 int relocated; 722 struct iso_directory_record *isodir; 723 { 724 struct iso_mnt *imp; 725 struct iso_node *ip; 726 #ifdef ISODEVMAP 727 struct iso_dnode *dp; 728 #endif 729 struct buf *bp; 730 struct vnode *vp, *nvp; 731 dev_t dev; 732 int error; 733 734 imp = VFSTOISOFS(mp); 735 dev = imp->im_dev; 736 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 737 return (0); 738 739 /* Allocate a new vnode/iso_node. */ 740 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 741 *vpp = NULLVP; 742 return (error); 743 } 744 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 745 memset(ip, 0, sizeof(struct iso_node)); 746 vp->v_data = ip; 747 ip->i_vnode = vp; 748 ip->i_dev = dev; 749 ip->i_number = ino; 750 751 /* 752 * Put it onto its hash chain and lock it so that other requests for 753 * this inode will block if they arrive while we are sleeping waiting 754 * for old data structures to be purged or for the contents of the 755 * disk portion of this inode to be read. 756 */ 757 cd9660_ihashins(ip); 758 759 if (isodir == 0) { 760 int lbn, off; 761 762 lbn = lblkno(imp, ino); 763 if (lbn >= imp->volume_space_size) { 764 vput(vp); 765 printf("fhtovp: lbn exceed volume space %d\n", lbn); 766 return (ESTALE); 767 } 768 769 off = blkoff(imp, ino); 770 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 771 vput(vp); 772 printf("fhtovp: crosses block boundary %d\n", 773 off + ISO_DIRECTORY_RECORD_SIZE); 774 return (ESTALE); 775 } 776 777 error = bread(imp->im_devvp, 778 lbn << (imp->im_bshift - DEV_BSHIFT), 779 imp->logical_block_size, NOCRED, &bp); 780 if (error) { 781 vput(vp); 782 brelse(bp); 783 printf("fhtovp: bread error %d\n",error); 784 return (error); 785 } 786 isodir = (struct iso_directory_record *)(bp->b_data + off); 787 788 if (off + isonum_711(isodir->length) > 789 imp->logical_block_size) { 790 vput(vp); 791 if (bp != 0) 792 brelse(bp); 793 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 794 off +isonum_711(isodir->length), off, 795 isonum_711(isodir->length)); 796 return (ESTALE); 797 } 798 799 #if 0 800 if (isonum_733(isodir->extent) + 801 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 802 if (bp != 0) 803 brelse(bp); 804 printf("fhtovp: file start miss %d vs %d\n", 805 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 806 ifhp->ifid_start); 807 return (ESTALE); 808 } 809 #endif 810 } else 811 bp = 0; 812 813 ip->i_mnt = imp; 814 ip->i_devvp = imp->im_devvp; 815 VREF(ip->i_devvp); 816 817 if (relocated) { 818 /* 819 * On relocated directories we must 820 * read the `.' entry out of a dir. 821 */ 822 ip->iso_start = ino >> imp->im_bshift; 823 if (bp != 0) 824 brelse(bp); 825 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 826 vput(vp); 827 return (error); 828 } 829 isodir = (struct iso_directory_record *)bp->b_data; 830 } 831 832 ip->iso_extent = isonum_733(isodir->extent); 833 ip->i_size = isonum_733(isodir->size); 834 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 835 836 /* 837 * Setup time stamp, attribute 838 */ 839 vp->v_type = VNON; 840 switch (imp->iso_ftype) { 841 default: /* ISO_FTYPE_9660 */ 842 { 843 struct buf *bp2; 844 int off; 845 if ((imp->im_flags & ISOFSMNT_EXTATT) 846 && (off = isonum_711(isodir->ext_attr_length))) 847 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 848 NULL, &bp2); 849 else 850 bp2 = NULL; 851 cd9660_defattr(isodir, ip, bp2); 852 cd9660_deftstamp(isodir, ip, bp2); 853 if (bp2) 854 brelse(bp2); 855 break; 856 } 857 case ISO_FTYPE_RRIP: 858 cd9660_rrip_analyze(isodir, ip, imp); 859 break; 860 } 861 862 if (bp != 0) 863 brelse(bp); 864 865 /* 866 * Initialize the associated vnode 867 */ 868 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 869 case VFIFO: 870 vp->v_op = cd9660_fifoop_p; 871 break; 872 case VCHR: 873 case VBLK: 874 /* 875 * if device, look at device number table for translation 876 */ 877 #ifdef ISODEVMAP 878 if ((dp = iso_dmap(dev, ino, 0)) != NULL) 879 ip->inode.iso_rdev = dp->d_dev; 880 #endif 881 vp->v_op = cd9660_specop_p; 882 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 883 /* 884 * Discard unneeded vnode, but save its iso_node. 885 * Note that the lock is carried over in the iso_node 886 * to the replacement vnode. 887 */ 888 nvp->v_data = vp->v_data; 889 vp->v_data = NULL; 890 VOP_UNLOCK(vp, 0); 891 vp->v_op = spec_vnodeop_p; 892 vrele(vp); 893 vgone(vp); 894 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 895 /* 896 * Reinitialize aliased inode. 897 */ 898 vp = nvp; 899 ip->i_vnode = vp; 900 } 901 break; 902 case VLNK: 903 case VNON: 904 case VSOCK: 905 case VDIR: 906 case VBAD: 907 break; 908 case VREG: 909 uvm_vnp_setsize(vp, ip->i_size); 910 break; 911 } 912 913 if (ip->iso_extent == imp->root_extent) 914 vp->v_flag |= VROOT; 915 916 /* 917 * XXX need generation number? 918 */ 919 920 genfs_node_init(vp, &cd9660_genfsops); 921 *vpp = vp; 922 return (0); 923 } 924 925 /* 926 * Vnode pointer to File handle 927 */ 928 /* ARGSUSED */ 929 int 930 cd9660_vptofh(vp, fhp, fh_size) 931 struct vnode *vp; 932 struct fid *fhp; 933 size_t *fh_size; 934 { 935 struct iso_node *ip = VTOI(vp); 936 struct ifid ifh; 937 938 if (*fh_size < sizeof(struct ifid)) { 939 *fh_size = sizeof(struct ifid); 940 return E2BIG; 941 } 942 *fh_size = sizeof(struct ifid); 943 944 memset(&ifh, 0, sizeof(ifh)); 945 ifh.ifid_len = sizeof(struct ifid); 946 ifh.ifid_ino = ip->i_number; 947 ifh.ifid_start = ip->iso_start; 948 memcpy(fhp, &ifh, sizeof(ifh)); 949 950 #ifdef ISOFS_DBG 951 printf("vptofh: ino %d, start %ld\n", 952 ifh.ifid_ino,ifh.ifid_start); 953 #endif 954 return 0; 955 } 956 957 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 958 { 959 960 sysctl_createv(clog, 0, NULL, NULL, 961 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 962 NULL, 0, NULL, 0, 963 CTL_VFS, CTL_EOL); 964 sysctl_createv(clog, 0, NULL, NULL, 965 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 966 SYSCTL_DESCR("ISO-9660 file system"), 967 NULL, 0, NULL, 0, 968 CTL_VFS, 14, CTL_EOL); 969 970 sysctl_createv(clog, 0, NULL, NULL, 971 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 972 CTLTYPE_INT, "utf8_joliet", 973 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 974 NULL, 0, &cd9660_utf8_joliet, 0, 975 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 976 977 } 978
Indexes created Sat Sep 27 14:09:57 GMT 2025