cd9660_vfsops.c revision 1.34
1 /* $NetBSD: cd9660_vfsops.c,v 1.34 2006/07/23 22:06:10 ad 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 1.34 2006/07/23 22:06:10 ad 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 }; 108 VFS_ATTACH(cd9660_vfsops); 109 110 static const struct genfs_ops cd9660_genfsops = { 111 .gop_size = genfs_size, 112 }; 113 114 /* 115 * Called by vfs_mountroot when iso is going to be mounted as root. 116 * 117 * Name is updated by mount(8) after booting. 118 */ 119 #define ROOTNAME "root_device" 120 121 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 122 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 123 struct lwp *l, struct iso_args *argp); 124 125 int 126 cd9660_mountroot() 127 { 128 struct mount *mp; 129 struct lwp *l = curlwp; /* XXX */ 130 int error; 131 struct iso_args args; 132 133 if (device_class(root_device) != DV_DISK) 134 return (ENODEV); 135 136 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 137 != 0) { 138 vrele(rootvp); 139 return (error); 140 } 141 142 args.flags = ISOFSMNT_ROOT; 143 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 144 mp->mnt_op->vfs_refcount--; 145 vfs_unbusy(mp); 146 free(mp, M_MOUNT); 147 return (error); 148 } 149 simple_lock(&mountlist_slock); 150 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 151 simple_unlock(&mountlist_slock); 152 (void)cd9660_statvfs(mp, &mp->mnt_stat, l); 153 vfs_unbusy(mp); 154 return (0); 155 } 156 157 /* 158 * VFS Operations. 159 * 160 * mount system call 161 */ 162 int 163 cd9660_mount(mp, path, data, ndp, l) 164 struct mount *mp; 165 const char *path; 166 void *data; 167 struct nameidata *ndp; 168 struct lwp *l; 169 { 170 struct vnode *devvp; 171 struct iso_args args; 172 int error; 173 struct iso_mnt *imp = VFSTOISOFS(mp); 174 175 if (mp->mnt_flag & MNT_GETARGS) { 176 if (imp == NULL) 177 return EIO; 178 args.fspec = NULL; 179 args.flags = imp->im_flags; 180 return copyout(&args, data, sizeof(args)); 181 } 182 error = copyin(data, &args, sizeof (struct iso_args)); 183 if (error) 184 return (error); 185 186 if ((mp->mnt_flag & MNT_RDONLY) == 0) 187 return (EROFS); 188 189 if ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 190 return EINVAL; 191 192 /* 193 * Not an update, or updating the name: look up the name 194 * and verify that it refers to a sensible block device. 195 */ 196 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 197 if ((error = namei(ndp)) != 0) 198 return (error); 199 devvp = ndp->ni_vp; 200 201 if (devvp->v_type != VBLK) { 202 vrele(devvp); 203 return ENOTBLK; 204 } 205 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 206 vrele(devvp); 207 return ENXIO; 208 } 209 /* 210 * If mount by non-root, then verify that user has necessary 211 * permissions on the device. 212 */ 213 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) { 214 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 215 error = VOP_ACCESS(devvp, VREAD, l->l_cred, l); 216 VOP_UNLOCK(devvp, 0); 217 if (error) { 218 vrele(devvp); 219 return (error); 220 } 221 } 222 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 223 /* 224 * Disallow multiple mounts of the same device. 225 * Disallow mounting of a device that is currently in use 226 * (except for root, which might share swap device for 227 * miniroot). 228 */ 229 error = vfs_mountedon(devvp); 230 if (error) 231 goto fail; 232 if (vcount(devvp) > 1 && devvp != rootvp) { 233 error = EBUSY; 234 goto fail; 235 } 236 error = VOP_OPEN(devvp, FREAD, FSCRED, l); 237 if (error) 238 goto fail; 239 error = iso_mountfs(devvp, mp, l, &args); 240 if (error) { 241 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 242 (void)VOP_CLOSE(devvp, FREAD, NOCRED, l); 243 VOP_UNLOCK(devvp, 0); 244 goto fail; 245 } 246 } else { 247 vrele(devvp); 248 if (devvp != imp->im_devvp) 249 return (EINVAL); /* needs translation */ 250 } 251 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 252 mp, l); 253 254 fail: 255 vrele(devvp); 256 return (error); 257 } 258 259 /* 260 * Make a mount point from a volume descriptor 261 */ 262 static int 263 iso_makemp(isomp, bp, ea_len) 264 struct iso_mnt *isomp; 265 struct buf *bp; 266 int *ea_len; 267 { 268 struct iso_primary_descriptor *pri; 269 int logical_block_size; 270 struct iso_directory_record *rootp; 271 272 pri = (struct iso_primary_descriptor *)bp->b_data; 273 274 logical_block_size = isonum_723 (pri->logical_block_size); 275 276 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 277 || (logical_block_size & (logical_block_size - 1)) != 0) 278 return -1; 279 280 rootp = (struct iso_directory_record *)pri->root_directory_record; 281 282 isomp->logical_block_size = logical_block_size; 283 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 284 memcpy(isomp->root, rootp, sizeof(isomp->root)); 285 isomp->root_extent = isonum_733 (rootp->extent); 286 isomp->root_size = isonum_733 (rootp->size); 287 isomp->im_joliet_level = 0; 288 289 isomp->im_bmask = logical_block_size - 1; 290 isomp->im_bshift = 0; 291 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 292 isomp->im_bshift++; 293 294 if (ea_len != NULL) 295 *ea_len = isonum_711(rootp->ext_attr_length); 296 297 return 0; 298 } 299 300 /* 301 * Common code for mount and mountroot 302 */ 303 static int 304 iso_mountfs(devvp, mp, l, argp) 305 struct vnode *devvp; 306 struct mount *mp; 307 struct lwp *l; 308 struct iso_args *argp; 309 { 310 struct iso_mnt *isomp = (struct iso_mnt *)0; 311 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 312 dev_t dev = devvp->v_rdev; 313 int error = EINVAL; 314 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 315 int iso_bsize; 316 int iso_blknum; 317 int joliet_level; 318 struct iso_volume_descriptor *vdp; 319 struct iso_supplementary_descriptor *sup; 320 int sess = 0; 321 int ext_attr_length; 322 struct disklabel label; 323 324 if (!ronly) 325 return EROFS; 326 327 /* Flush out any old buffers remaining from a previous use. */ 328 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 329 return (error); 330 331 /* This is the "logical sector size". The standard says this 332 * should be 2048 or the physical sector size on the device, 333 * whichever is greater. For now, we'll just use a constant. 334 */ 335 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 336 337 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, l); 338 if (!error && 339 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 340 /* XXX more sanity checks? */ 341 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 342 } else { 343 /* fallback to old method */ 344 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, l); 345 if (error) 346 sess = 0; /* never mind */ 347 } 348 #ifdef ISO_DEBUG 349 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 350 #endif 351 352 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 353 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 354 iso_bsize, NOCRED, &bp)) != 0) 355 goto out; 356 357 vdp = (struct iso_volume_descriptor *)bp->b_data; 358 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 359 error = EINVAL; 360 goto out; 361 } 362 363 switch (isonum_711(vdp->type)) { 364 case ISO_VD_PRIMARY: 365 if (pribp == NULL) { 366 pribp = bp; 367 bp = NULL; 368 } 369 break; 370 371 case ISO_VD_SUPPLEMENTARY: 372 if (supbp == NULL) { 373 supbp = bp; 374 bp = NULL; 375 } 376 break; 377 378 default: 379 break; 380 } 381 382 if (isonum_711 (vdp->type) == ISO_VD_END) { 383 brelse(bp); 384 bp = NULL; 385 break; 386 } 387 388 if (bp != NULL) { 389 brelse(bp); 390 bp = NULL; 391 } 392 } 393 394 if (pribp == NULL) { 395 error = EINVAL; 396 goto out; 397 } 398 399 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 400 memset(isomp, 0, sizeof *isomp); 401 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 402 error = EINVAL; 403 goto out; 404 } 405 406 isomp->volume_space_size += sess; 407 408 pribp->b_flags |= B_AGE; 409 brelse(pribp); 410 pribp = NULL; 411 412 mp->mnt_data = isomp; 413 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 414 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 415 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 416 mp->mnt_stat.f_namemax = MAXNAMLEN; 417 mp->mnt_flag |= MNT_LOCAL; 418 mp->mnt_dev_bshift = iso_bsize; 419 mp->mnt_fs_bshift = isomp->im_bshift; 420 isomp->im_mountp = mp; 421 isomp->im_dev = dev; 422 isomp->im_devvp = devvp; 423 424 devvp->v_specmountpoint = mp; 425 426 /* Check the Rock Ridge Extension support */ 427 if (!(argp->flags & ISOFSMNT_NORRIP)) { 428 struct iso_directory_record *rootp; 429 430 if ((error = bread(isomp->im_devvp, 431 (isomp->root_extent + ext_attr_length) << 432 (isomp->im_bshift - DEV_BSHIFT), 433 isomp->logical_block_size, NOCRED, 434 &bp)) != 0) 435 goto out; 436 437 rootp = (struct iso_directory_record *)bp->b_data; 438 439 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 440 argp->flags |= ISOFSMNT_NORRIP; 441 } else { 442 argp->flags &= ~ISOFSMNT_GENS; 443 } 444 445 /* 446 * The contents are valid, 447 * but they will get reread as part of another vnode, so... 448 */ 449 bp->b_flags |= B_AGE; 450 brelse(bp); 451 bp = NULL; 452 } 453 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 454 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 455 456 if (isomp->im_flags & ISOFSMNT_GENS) 457 isomp->iso_ftype = ISO_FTYPE_9660; 458 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 459 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 460 if (argp->flags & ISOFSMNT_NOCASETRANS) 461 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 462 } else 463 isomp->iso_ftype = ISO_FTYPE_RRIP; 464 465 /* Check the Joliet Extension support */ 466 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 467 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 468 supbp != NULL) { 469 joliet_level = 0; 470 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 471 472 if ((isonum_711(sup->flags) & 1) == 0) { 473 if (memcmp(sup->escape, "%/@", 3) == 0) 474 joliet_level = 1; 475 if (memcmp(sup->escape, "%/C", 3) == 0) 476 joliet_level = 2; 477 if (memcmp(sup->escape, "%/E", 3) == 0) 478 joliet_level = 3; 479 } 480 if (joliet_level != 0) { 481 if (iso_makemp(isomp, supbp, NULL) == -1) { 482 error = EINVAL; 483 goto out; 484 } 485 isomp->im_joliet_level = joliet_level; 486 } 487 } 488 489 if (supbp != NULL) { 490 brelse(supbp); 491 supbp = NULL; 492 } 493 494 return 0; 495 out: 496 if (bp) 497 brelse(bp); 498 if (pribp) 499 brelse(pribp); 500 if (supbp) 501 brelse(supbp); 502 if (isomp) { 503 free(isomp, M_ISOFSMNT); 504 mp->mnt_data = NULL; 505 } 506 return error; 507 } 508 509 /* 510 * Make a filesystem operational. 511 * Nothing to do at the moment. 512 */ 513 /* ARGSUSED */ 514 int 515 cd9660_start(mp, flags, l) 516 struct mount *mp; 517 int flags; 518 struct lwp *l; 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(mp, cmd, uid, arg, l) 591 struct mount *mp; 592 int cmd; 593 uid_t uid; 594 void *arg; 595 struct lwp *l; 596 { 597 598 return (EOPNOTSUPP); 599 } 600 601 /* 602 * Get file system statistics. 603 */ 604 int 605 cd9660_statvfs(mp, sbp, l) 606 struct mount *mp; 607 struct statvfs *sbp; 608 struct lwp *l; 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(mp, waitfor, cred, l) 634 struct mount *mp; 635 int waitfor; 636 kauth_cred_t cred; 637 struct lwp *l; 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 Mon Sep 29 21:09:56 GMT 2025