cd9660_vfsops.c revision 1.49
1 /* $NetBSD: cd9660_vfsops.c,v 1.49 2007/10/10 20:42:22 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 1.49 2007/10/10 20:42:22 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_JUSTDEFINE(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 sizeof (struct iso_args), 91 cd9660_mount, 92 cd9660_start, 93 cd9660_unmount, 94 cd9660_root, 95 cd9660_quotactl, 96 cd9660_statvfs, 97 cd9660_sync, 98 cd9660_vget, 99 cd9660_fhtovp, 100 cd9660_vptofh, 101 cd9660_init, 102 cd9660_reinit, 103 cd9660_done, 104 cd9660_mountroot, 105 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 106 vfs_stdextattrctl, 107 (void *)eopnotsupp, /* vfs_suspendctl */ 108 cd9660_vnodeopv_descs, 109 0, /* refcount */ 110 { NULL, NULL } /* list */ 111 }; 112 VFS_ATTACH(cd9660_vfsops); 113 114 static const struct genfs_ops cd9660_genfsops = { 115 .gop_size = genfs_size, 116 }; 117 118 /* 119 * Called by vfs_mountroot when iso is going to be mounted as root. 120 * 121 * Name is updated by mount(8) after booting. 122 */ 123 #define ROOTNAME "root_device" 124 125 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 126 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 127 struct lwp *l, struct iso_args *argp); 128 129 int 130 cd9660_mountroot() 131 { 132 struct mount *mp; 133 struct lwp *l = curlwp; /* XXX */ 134 int error; 135 struct iso_args args; 136 137 if (device_class(root_device) != DV_DISK) 138 return (ENODEV); 139 140 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 141 != 0) { 142 vrele(rootvp); 143 return (error); 144 } 145 146 args.flags = ISOFSMNT_ROOT; 147 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 148 mp->mnt_op->vfs_refcount--; 149 vfs_unbusy(mp); 150 vfs_destroy(mp); 151 return (error); 152 } 153 mutex_enter(&mountlist_lock); 154 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 155 mutex_exit(&mountlist_lock); 156 (void)cd9660_statvfs(mp, &mp->mnt_stat, l); 157 vfs_unbusy(mp); 158 return (0); 159 } 160 161 /* 162 * VFS Operations. 163 * 164 * mount system call 165 */ 166 int 167 cd9660_mount(mp, path, data, data_len, l) 168 struct mount *mp; 169 const char *path; 170 void *data; 171 size_t *data_len; 172 struct lwp *l; 173 { 174 struct nameidata nd; 175 struct vnode *devvp; 176 struct iso_args *args = data; 177 int error; 178 struct iso_mnt *imp = VFSTOISOFS(mp); 179 180 if (*data_len < sizeof *args) 181 return EINVAL; 182 183 if (mp->mnt_flag & MNT_GETARGS) { 184 if (imp == NULL) 185 return EIO; 186 args->fspec = NULL; 187 args->flags = imp->im_flags; 188 *data_len = sizeof (*args); 189 return 0; 190 } 191 192 if ((mp->mnt_flag & MNT_RDONLY) == 0) 193 return (EROFS); 194 195 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 196 return EINVAL; 197 198 /* 199 * Not an update, or updating the name: look up the name 200 * and verify that it refers to a sensible block device. 201 */ 202 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec, l); 203 if ((error = namei(&nd)) != 0) 204 return (error); 205 devvp = nd.ni_vp; 206 207 if (devvp->v_type != VBLK) { 208 vrele(devvp); 209 return ENOTBLK; 210 } 211 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 212 vrele(devvp); 213 return ENXIO; 214 } 215 /* 216 * If mount by non-root, then verify that user has necessary 217 * permissions on the device. 218 */ 219 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) { 220 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 221 error = VOP_ACCESS(devvp, VREAD, l->l_cred, l); 222 VOP_UNLOCK(devvp, 0); 223 if (error) { 224 vrele(devvp); 225 return (error); 226 } 227 } 228 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 229 /* 230 * Disallow multiple mounts of the same device. 231 * Disallow mounting of a device that is currently in use 232 * (except for root, which might share swap device for 233 * miniroot). 234 */ 235 error = vfs_mountedon(devvp); 236 if (error) 237 goto fail; 238 if (vcount(devvp) > 1 && devvp != rootvp) { 239 error = EBUSY; 240 goto fail; 241 } 242 error = VOP_OPEN(devvp, FREAD, FSCRED, l); 243 if (error) 244 goto fail; 245 error = iso_mountfs(devvp, mp, l, args); 246 if (error) { 247 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 248 (void)VOP_CLOSE(devvp, FREAD, NOCRED, l); 249 VOP_UNLOCK(devvp, 0); 250 goto fail; 251 } 252 } else { 253 vrele(devvp); 254 if (devvp != imp->im_devvp) 255 return (EINVAL); /* needs translation */ 256 } 257 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 258 mp->mnt_op->vfs_name, mp, l); 259 260 fail: 261 vrele(devvp); 262 return (error); 263 } 264 265 /* 266 * Make a mount point from a volume descriptor 267 */ 268 static int 269 iso_makemp(isomp, bp, ea_len) 270 struct iso_mnt *isomp; 271 struct buf *bp; 272 int *ea_len; 273 { 274 struct iso_primary_descriptor *pri; 275 int logical_block_size; 276 struct iso_directory_record *rootp; 277 278 pri = (struct iso_primary_descriptor *)bp->b_data; 279 280 logical_block_size = isonum_723 (pri->logical_block_size); 281 282 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 283 || (logical_block_size & (logical_block_size - 1)) != 0) 284 return -1; 285 286 rootp = (struct iso_directory_record *)pri->root_directory_record; 287 288 isomp->logical_block_size = logical_block_size; 289 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 290 memcpy(isomp->root, rootp, sizeof(isomp->root)); 291 isomp->root_extent = isonum_733 (rootp->extent); 292 isomp->root_size = isonum_733 (rootp->size); 293 isomp->im_joliet_level = 0; 294 295 isomp->im_bmask = logical_block_size - 1; 296 isomp->im_bshift = 0; 297 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 298 isomp->im_bshift++; 299 300 if (ea_len != NULL) 301 *ea_len = isonum_711(rootp->ext_attr_length); 302 303 return 0; 304 } 305 306 /* 307 * Common code for mount and mountroot 308 */ 309 static int 310 iso_mountfs(devvp, mp, l, argp) 311 struct vnode *devvp; 312 struct mount *mp; 313 struct lwp *l; 314 struct iso_args *argp; 315 { 316 struct iso_mnt *isomp = (struct iso_mnt *)0; 317 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 318 dev_t dev = devvp->v_rdev; 319 int error = EINVAL; 320 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 321 int iso_bsize; 322 int iso_blknum; 323 int joliet_level; 324 struct iso_volume_descriptor *vdp; 325 struct iso_supplementary_descriptor *sup; 326 int sess = 0; 327 int ext_attr_length; 328 struct disklabel label; 329 330 if (!ronly) 331 return EROFS; 332 333 /* Flush out any old buffers remaining from a previous use. */ 334 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 335 return (error); 336 337 /* This is the "logical sector size". The standard says this 338 * should be 2048 or the physical sector size on the device, 339 * whichever is greater. For now, we'll just use a constant. 340 */ 341 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 342 343 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, l); 344 if (!error && 345 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 346 /* XXX more sanity checks? */ 347 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 348 } else { 349 /* fallback to old method */ 350 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, l); 351 if (error) 352 sess = 0; /* never mind */ 353 } 354 #ifdef ISO_DEBUG 355 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 356 #endif 357 358 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 359 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 360 iso_bsize, NOCRED, &bp)) != 0) 361 goto out; 362 363 vdp = (struct iso_volume_descriptor *)bp->b_data; 364 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 365 error = EINVAL; 366 goto out; 367 } 368 369 switch (isonum_711(vdp->type)) { 370 case ISO_VD_PRIMARY: 371 if (pribp == NULL) { 372 pribp = bp; 373 bp = NULL; 374 } 375 break; 376 377 case ISO_VD_SUPPLEMENTARY: 378 if (supbp == NULL) { 379 supbp = bp; 380 bp = NULL; 381 } 382 break; 383 384 default: 385 break; 386 } 387 388 if (isonum_711 (vdp->type) == ISO_VD_END) { 389 brelse(bp, 0); 390 bp = NULL; 391 break; 392 } 393 394 if (bp != NULL) { 395 brelse(bp, 0); 396 bp = NULL; 397 } 398 } 399 400 if (pribp == NULL) { 401 error = EINVAL; 402 goto out; 403 } 404 405 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 406 memset(isomp, 0, sizeof *isomp); 407 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 408 error = EINVAL; 409 goto out; 410 } 411 412 isomp->volume_space_size += sess; 413 414 brelse(pribp, BC_AGE); 415 pribp = NULL; 416 417 mp->mnt_data = isomp; 418 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 419 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 420 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 421 mp->mnt_stat.f_namemax = MAXNAMLEN; 422 mp->mnt_flag |= MNT_LOCAL; 423 mp->mnt_dev_bshift = iso_bsize; 424 mp->mnt_fs_bshift = isomp->im_bshift; 425 isomp->im_mountp = mp; 426 isomp->im_dev = dev; 427 isomp->im_devvp = devvp; 428 429 /* Check the Rock Ridge Extension support */ 430 if (!(argp->flags & ISOFSMNT_NORRIP)) { 431 struct iso_directory_record *rootp; 432 433 if ((error = bread(isomp->im_devvp, 434 (isomp->root_extent + ext_attr_length) << 435 (isomp->im_bshift - DEV_BSHIFT), 436 isomp->logical_block_size, NOCRED, 437 &bp)) != 0) 438 goto out; 439 440 rootp = (struct iso_directory_record *)bp->b_data; 441 442 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 443 argp->flags |= ISOFSMNT_NORRIP; 444 } else { 445 argp->flags &= ~ISOFSMNT_GENS; 446 } 447 448 /* 449 * The contents are valid, 450 * but they will get reread as part of another vnode, so... 451 */ 452 brelse(bp, BC_AGE); 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, 0); 493 supbp = NULL; 494 } 495 496 devvp->v_specmountpoint = mp; 497 498 return 0; 499 out: 500 if (bp) 501 brelse(bp, 0); 502 if (pribp) 503 brelse(pribp, 0); 504 if (supbp) 505 brelse(supbp, 0); 506 if (isomp) { 507 free(isomp, M_ISOFSMNT); 508 mp->mnt_data = NULL; 509 } 510 return error; 511 } 512 513 /* 514 * Make a filesystem operational. 515 * Nothing to do at the moment. 516 */ 517 /* ARGSUSED */ 518 int 519 cd9660_start(struct mount *mp, int flags, 520 struct lwp *l) 521 { 522 return 0; 523 } 524 525 /* 526 * unmount system call 527 */ 528 int 529 cd9660_unmount(mp, mntflags, l) 530 struct mount *mp; 531 int mntflags; 532 struct lwp *l; 533 { 534 struct iso_mnt *isomp; 535 int error, flags = 0; 536 537 if (mntflags & MNT_FORCE) 538 flags |= FORCECLOSE; 539 if ((error = vflush(mp, NULLVP, flags)) != 0) 540 return (error); 541 542 isomp = VFSTOISOFS(mp); 543 544 #ifdef ISODEVMAP 545 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 546 iso_dunmap(isomp->im_dev); 547 #endif 548 549 if (isomp->im_devvp->v_type != VBAD) 550 isomp->im_devvp->v_specmountpoint = NULL; 551 552 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 553 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, l); 554 vput(isomp->im_devvp); 555 free(isomp, M_ISOFSMNT); 556 mp->mnt_data = NULL; 557 mp->mnt_flag &= ~MNT_LOCAL; 558 return (error); 559 } 560 561 /* 562 * Return root of a filesystem 563 */ 564 int 565 cd9660_root(mp, vpp) 566 struct mount *mp; 567 struct vnode **vpp; 568 { 569 struct iso_mnt *imp = VFSTOISOFS(mp); 570 struct iso_directory_record *dp = 571 (struct iso_directory_record *)imp->root; 572 ino_t ino = isodirino(dp, imp); 573 574 /* 575 * With RRIP we must use the `.' entry of the root directory. 576 * Simply tell vget, that it's a relocated directory. 577 */ 578 return (cd9660_vget_internal(mp, ino, vpp, 579 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 580 } 581 582 /* 583 * Do operations associated with quotas, not supported 584 */ 585 /* ARGSUSED */ 586 int 587 cd9660_quotactl( 588 struct mount *mp, 589 int cmd, 590 uid_t uid, 591 void *arg, 592 struct lwp *l) 593 { 594 595 return (EOPNOTSUPP); 596 } 597 598 /* 599 * Get file system statistics. 600 */ 601 int 602 cd9660_statvfs( 603 struct mount *mp, 604 struct statvfs *sbp, 605 struct lwp *l) 606 { 607 struct iso_mnt *isomp; 608 609 isomp = VFSTOISOFS(mp); 610 611 sbp->f_bsize = isomp->logical_block_size; 612 sbp->f_frsize = sbp->f_bsize; 613 sbp->f_iosize = sbp->f_bsize; /* XXX */ 614 sbp->f_blocks = isomp->volume_space_size; 615 sbp->f_bfree = 0; /* total free blocks */ 616 sbp->f_bavail = 0; /* blocks free for non superuser */ 617 sbp->f_bresvd = 0; /* total reserved blocks */ 618 sbp->f_files = 0; /* total files */ 619 sbp->f_ffree = 0; /* free file nodes */ 620 sbp->f_favail = 0; /* free file nodes for non superuser */ 621 sbp->f_fresvd = 0; /* reserved file nodes */ 622 copy_statvfs_info(sbp, mp); 623 /* Use the first spare for flags: */ 624 sbp->f_spare[0] = isomp->im_flags; 625 return 0; 626 } 627 628 /* ARGSUSED */ 629 int 630 cd9660_sync( 631 struct mount *mp, 632 int waitfor, 633 kauth_cred_t cred, 634 struct lwp *l) 635 { 636 return (0); 637 } 638 639 /* 640 * File handle to vnode 641 * 642 * Have to be really careful about stale file handles: 643 * - check that the inode number is in range 644 * - call iget() to get the locked inode 645 * - check for an unallocated inode (i_mode == 0) 646 * - check that the generation number matches 647 */ 648 649 struct ifid { 650 ushort ifid_len; 651 ushort ifid_pad; 652 int ifid_ino; 653 long ifid_start; 654 }; 655 656 /* ARGSUSED */ 657 int 658 cd9660_fhtovp(mp, fhp, vpp) 659 struct mount *mp; 660 struct fid *fhp; 661 struct vnode **vpp; 662 { 663 struct ifid ifh; 664 struct iso_node *ip; 665 struct vnode *nvp; 666 int error; 667 668 if (fhp->fid_len != sizeof(ifh)) 669 return EINVAL; 670 671 memcpy(&ifh, fhp, sizeof(ifh)); 672 #ifdef ISOFS_DBG 673 printf("fhtovp: ino %d, start %ld\n", 674 ifh.ifid_ino, ifh.ifid_start); 675 #endif 676 677 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 678 *vpp = NULLVP; 679 return (error); 680 } 681 ip = VTOI(nvp); 682 if (ip->inode.iso_mode == 0) { 683 vput(nvp); 684 *vpp = NULLVP; 685 return (ESTALE); 686 } 687 *vpp = nvp; 688 return (0); 689 } 690 691 int 692 cd9660_vget(mp, ino, vpp) 693 struct mount *mp; 694 ino_t ino; 695 struct vnode **vpp; 696 { 697 698 /* 699 * XXXX 700 * It would be nice if we didn't always set the `relocated' flag 701 * and force the extra read, but I don't want to think about fixing 702 * that right now. 703 */ 704 return (cd9660_vget_internal(mp, ino, vpp, 705 #if 0 706 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 707 #else 708 0, 709 #endif 710 NULL)); 711 } 712 713 int 714 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 715 struct mount *mp; 716 ino_t ino; 717 struct vnode **vpp; 718 int relocated; 719 struct iso_directory_record *isodir; 720 { 721 struct iso_mnt *imp; 722 struct iso_node *ip; 723 #ifdef ISODEVMAP 724 struct iso_dnode *dp; 725 #endif 726 struct buf *bp; 727 struct vnode *vp, *nvp; 728 dev_t dev; 729 int error; 730 731 imp = VFSTOISOFS(mp); 732 dev = imp->im_dev; 733 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 734 return (0); 735 736 /* Allocate a new vnode/iso_node. */ 737 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 738 *vpp = NULLVP; 739 return (error); 740 } 741 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 742 memset(ip, 0, sizeof(struct iso_node)); 743 vp->v_data = ip; 744 ip->i_vnode = vp; 745 ip->i_dev = dev; 746 ip->i_number = ino; 747 748 /* 749 * Put it onto its hash chain and lock it so that other requests for 750 * this inode will block if they arrive while we are sleeping waiting 751 * for old data structures to be purged or for the contents of the 752 * disk portion of this inode to be read. 753 */ 754 cd9660_ihashins(ip); 755 756 if (isodir == 0) { 757 int lbn, off; 758 759 lbn = lblkno(imp, ino); 760 if (lbn >= imp->volume_space_size) { 761 vput(vp); 762 printf("fhtovp: lbn exceed volume space %d\n", lbn); 763 return (ESTALE); 764 } 765 766 off = blkoff(imp, ino); 767 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 768 vput(vp); 769 printf("fhtovp: crosses block boundary %d\n", 770 off + ISO_DIRECTORY_RECORD_SIZE); 771 return (ESTALE); 772 } 773 774 error = bread(imp->im_devvp, 775 lbn << (imp->im_bshift - DEV_BSHIFT), 776 imp->logical_block_size, NOCRED, &bp); 777 if (error) { 778 vput(vp); 779 brelse(bp, 0); 780 printf("fhtovp: bread error %d\n",error); 781 return (error); 782 } 783 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 784 785 if (off + isonum_711(isodir->length) > 786 imp->logical_block_size) { 787 vput(vp); 788 if (bp != 0) 789 brelse(bp, 0); 790 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 791 off +isonum_711(isodir->length), off, 792 isonum_711(isodir->length)); 793 return (ESTALE); 794 } 795 796 #if 0 797 if (isonum_733(isodir->extent) + 798 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 799 if (bp != 0) 800 brelse(bp, 0); 801 printf("fhtovp: file start miss %d vs %d\n", 802 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 803 ifhp->ifid_start); 804 return (ESTALE); 805 } 806 #endif 807 } else 808 bp = 0; 809 810 ip->i_mnt = imp; 811 ip->i_devvp = imp->im_devvp; 812 VREF(ip->i_devvp); 813 814 if (relocated) { 815 /* 816 * On relocated directories we must 817 * read the `.' entry out of a dir. 818 */ 819 ip->iso_start = ino >> imp->im_bshift; 820 if (bp != 0) 821 brelse(bp, 0); 822 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 823 vput(vp); 824 return (error); 825 } 826 isodir = (struct iso_directory_record *)bp->b_data; 827 } 828 829 ip->iso_extent = isonum_733(isodir->extent); 830 ip->i_size = isonum_733(isodir->size); 831 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 832 833 /* 834 * Setup time stamp, attribute 835 */ 836 vp->v_type = VNON; 837 switch (imp->iso_ftype) { 838 default: /* ISO_FTYPE_9660 */ 839 { 840 struct buf *bp2; 841 int off; 842 if ((imp->im_flags & ISOFSMNT_EXTATT) 843 && (off = isonum_711(isodir->ext_attr_length))) 844 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 845 NULL, &bp2); 846 else 847 bp2 = NULL; 848 cd9660_defattr(isodir, ip, bp2); 849 cd9660_deftstamp(isodir, ip, bp2); 850 if (bp2) 851 brelse(bp2, 0); 852 break; 853 } 854 case ISO_FTYPE_RRIP: 855 cd9660_rrip_analyze(isodir, ip, imp); 856 break; 857 } 858 859 if (bp != 0) 860 brelse(bp, 0); 861 862 /* 863 * Initialize the associated vnode 864 */ 865 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 866 case VFIFO: 867 vp->v_op = cd9660_fifoop_p; 868 break; 869 case VCHR: 870 case VBLK: 871 /* 872 * if device, look at device number table for translation 873 */ 874 #ifdef ISODEVMAP 875 if ((dp = iso_dmap(dev, ino, 0)) != NULL) 876 ip->inode.iso_rdev = dp->d_dev; 877 #endif 878 vp->v_op = cd9660_specop_p; 879 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 880 /* 881 * Discard unneeded vnode, but save its iso_node. 882 * Note that the lock is carried over in the iso_node 883 * to the replacement vnode. 884 */ 885 nvp->v_data = vp->v_data; 886 vp->v_data = NULL; 887 VOP_UNLOCK(vp, 0); 888 vp->v_op = spec_vnodeop_p; 889 vrele(vp); 890 vgone(vp); 891 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 892 /* 893 * Reinitialize aliased inode. 894 */ 895 vp = nvp; 896 ip->i_vnode = vp; 897 } 898 break; 899 case VLNK: 900 case VNON: 901 case VSOCK: 902 case VDIR: 903 case VBAD: 904 break; 905 case VREG: 906 uvm_vnp_setsize(vp, ip->i_size); 907 break; 908 } 909 910 if (vp->v_type != VREG) 911 uvm_vnp_setsize(vp, 0); 912 913 if (ip->iso_extent == imp->root_extent) 914 vp->v_vflag |= VV_ROOT; 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 Fri Sep 26 20:09:58 GMT 2025