cd9660_vfsops.c revision 1.32
1 /* $NetBSD: cd9660_vfsops.c,v 1.32 2006/05/14 21:31:52 elad 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 1.32 2006/05/14 21:31:52 elad 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 struct proc *p; 173 int error; 174 struct iso_mnt *imp = VFSTOISOFS(mp); 175 176 p = l->l_proc; 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(p->p_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) { 216 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 217 error = VOP_ACCESS(devvp, VREAD, p->p_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_proc->p_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(mp, flags, l) 518 struct mount *mp; 519 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 0 540 mntflushbuf(mp, 0); 541 if (mntinvalbuf(mp)) 542 return EBUSY; 543 #endif 544 if ((error = vflush(mp, NULLVP, flags)) != 0) 545 return (error); 546 547 isomp = VFSTOISOFS(mp); 548 549 #ifdef ISODEVMAP 550 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 551 iso_dunmap(isomp->im_dev); 552 #endif 553 554 if (isomp->im_devvp->v_type != VBAD) 555 isomp->im_devvp->v_specmountpoint = NULL; 556 557 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 558 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, l); 559 vput(isomp->im_devvp); 560 free(isomp, M_ISOFSMNT); 561 mp->mnt_data = NULL; 562 mp->mnt_flag &= ~MNT_LOCAL; 563 return (error); 564 } 565 566 /* 567 * Return root of a filesystem 568 */ 569 int 570 cd9660_root(mp, vpp) 571 struct mount *mp; 572 struct vnode **vpp; 573 { 574 struct iso_mnt *imp = VFSTOISOFS(mp); 575 struct iso_directory_record *dp = 576 (struct iso_directory_record *)imp->root; 577 ino_t ino = isodirino(dp, imp); 578 579 /* 580 * With RRIP we must use the `.' entry of the root directory. 581 * Simply tell vget, that it's a relocated directory. 582 */ 583 return (cd9660_vget_internal(mp, ino, vpp, 584 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 585 } 586 587 /* 588 * Do operations associated with quotas, not supported 589 */ 590 /* ARGSUSED */ 591 int 592 cd9660_quotactl(mp, cmd, uid, arg, l) 593 struct mount *mp; 594 int cmd; 595 uid_t uid; 596 void *arg; 597 struct lwp *l; 598 { 599 600 return (EOPNOTSUPP); 601 } 602 603 /* 604 * Get file system statistics. 605 */ 606 int 607 cd9660_statvfs(mp, sbp, l) 608 struct mount *mp; 609 struct statvfs *sbp; 610 struct lwp *l; 611 { 612 struct iso_mnt *isomp; 613 614 isomp = VFSTOISOFS(mp); 615 616 sbp->f_bsize = isomp->logical_block_size; 617 sbp->f_frsize = sbp->f_bsize; 618 sbp->f_iosize = sbp->f_bsize; /* XXX */ 619 sbp->f_blocks = isomp->volume_space_size; 620 sbp->f_bfree = 0; /* total free blocks */ 621 sbp->f_bavail = 0; /* blocks free for non superuser */ 622 sbp->f_bresvd = 0; /* total reserved blocks */ 623 sbp->f_files = 0; /* total files */ 624 sbp->f_ffree = 0; /* free file nodes */ 625 sbp->f_favail = 0; /* free file nodes for non superuser */ 626 sbp->f_fresvd = 0; /* reserved file nodes */ 627 copy_statvfs_info(sbp, mp); 628 /* Use the first spare for flags: */ 629 sbp->f_spare[0] = isomp->im_flags; 630 return 0; 631 } 632 633 /* ARGSUSED */ 634 int 635 cd9660_sync(mp, waitfor, cred, l) 636 struct mount *mp; 637 int waitfor; 638 kauth_cred_t cred; 639 struct lwp *l; 640 { 641 return (0); 642 } 643 644 /* 645 * File handle to vnode 646 * 647 * Have to be really careful about stale file handles: 648 * - check that the inode number is in range 649 * - call iget() to get the locked inode 650 * - check for an unallocated inode (i_mode == 0) 651 * - check that the generation number matches 652 */ 653 654 struct ifid { 655 ushort ifid_len; 656 ushort ifid_pad; 657 int ifid_ino; 658 long ifid_start; 659 }; 660 661 /* ARGSUSED */ 662 int 663 cd9660_fhtovp(mp, fhp, vpp) 664 struct mount *mp; 665 struct fid *fhp; 666 struct vnode **vpp; 667 { 668 struct ifid *ifhp = (struct ifid *)fhp; 669 struct iso_node *ip; 670 struct vnode *nvp; 671 int error; 672 673 #ifdef ISOFS_DBG 674 printf("fhtovp: ino %d, start %ld\n", 675 ifhp->ifid_ino, ifhp->ifid_start); 676 #endif 677 678 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 679 *vpp = NULLVP; 680 return (error); 681 } 682 ip = VTOI(nvp); 683 if (ip->inode.iso_mode == 0) { 684 vput(nvp); 685 *vpp = NULLVP; 686 return (ESTALE); 687 } 688 *vpp = nvp; 689 return (0); 690 } 691 692 int 693 cd9660_vget(mp, ino, vpp) 694 struct mount *mp; 695 ino_t ino; 696 struct vnode **vpp; 697 { 698 699 /* 700 * XXXX 701 * It would be nice if we didn't always set the `relocated' flag 702 * and force the extra read, but I don't want to think about fixing 703 * that right now. 704 */ 705 return (cd9660_vget_internal(mp, ino, vpp, 706 #if 0 707 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 708 #else 709 0, 710 #endif 711 NULL)); 712 } 713 714 int 715 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 716 struct mount *mp; 717 ino_t ino; 718 struct vnode **vpp; 719 int relocated; 720 struct iso_directory_record *isodir; 721 { 722 struct iso_mnt *imp; 723 struct iso_node *ip; 724 #ifdef ISODEVMAP 725 struct iso_dnode *dp; 726 #endif 727 struct buf *bp; 728 struct vnode *vp, *nvp; 729 dev_t dev; 730 int error; 731 732 imp = VFSTOISOFS(mp); 733 dev = imp->im_dev; 734 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 735 return (0); 736 737 /* Allocate a new vnode/iso_node. */ 738 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 739 *vpp = NULLVP; 740 return (error); 741 } 742 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 743 memset(ip, 0, sizeof(struct iso_node)); 744 vp->v_data = ip; 745 ip->i_vnode = vp; 746 ip->i_dev = dev; 747 ip->i_number = ino; 748 749 /* 750 * Put it onto its hash chain and lock it so that other requests for 751 * this inode will block if they arrive while we are sleeping waiting 752 * for old data structures to be purged or for the contents of the 753 * disk portion of this inode to be read. 754 */ 755 cd9660_ihashins(ip); 756 757 if (isodir == 0) { 758 int lbn, off; 759 760 lbn = lblkno(imp, ino); 761 if (lbn >= imp->volume_space_size) { 762 vput(vp); 763 printf("fhtovp: lbn exceed volume space %d\n", lbn); 764 return (ESTALE); 765 } 766 767 off = blkoff(imp, ino); 768 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 769 vput(vp); 770 printf("fhtovp: crosses block boundary %d\n", 771 off + ISO_DIRECTORY_RECORD_SIZE); 772 return (ESTALE); 773 } 774 775 error = bread(imp->im_devvp, 776 lbn << (imp->im_bshift - DEV_BSHIFT), 777 imp->logical_block_size, NOCRED, &bp); 778 if (error) { 779 vput(vp); 780 brelse(bp); 781 printf("fhtovp: bread error %d\n",error); 782 return (error); 783 } 784 isodir = (struct iso_directory_record *)(bp->b_data + off); 785 786 if (off + isonum_711(isodir->length) > 787 imp->logical_block_size) { 788 vput(vp); 789 if (bp != 0) 790 brelse(bp); 791 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 792 off +isonum_711(isodir->length), off, 793 isonum_711(isodir->length)); 794 return (ESTALE); 795 } 796 797 #if 0 798 if (isonum_733(isodir->extent) + 799 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 800 if (bp != 0) 801 brelse(bp); 802 printf("fhtovp: file start miss %d vs %d\n", 803 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 804 ifhp->ifid_start); 805 return (ESTALE); 806 } 807 #endif 808 } else 809 bp = 0; 810 811 ip->i_mnt = imp; 812 ip->i_devvp = imp->im_devvp; 813 VREF(ip->i_devvp); 814 815 if (relocated) { 816 /* 817 * On relocated directories we must 818 * read the `.' entry out of a dir. 819 */ 820 ip->iso_start = ino >> imp->im_bshift; 821 if (bp != 0) 822 brelse(bp); 823 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 824 vput(vp); 825 return (error); 826 } 827 isodir = (struct iso_directory_record *)bp->b_data; 828 } 829 830 ip->iso_extent = isonum_733(isodir->extent); 831 ip->i_size = isonum_733(isodir->size); 832 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 833 834 /* 835 * Setup time stamp, attribute 836 */ 837 vp->v_type = VNON; 838 switch (imp->iso_ftype) { 839 default: /* ISO_FTYPE_9660 */ 840 { 841 struct buf *bp2; 842 int off; 843 if ((imp->im_flags & ISOFSMNT_EXTATT) 844 && (off = isonum_711(isodir->ext_attr_length))) 845 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 846 NULL, &bp2); 847 else 848 bp2 = NULL; 849 cd9660_defattr(isodir, ip, bp2); 850 cd9660_deftstamp(isodir, ip, bp2); 851 if (bp2) 852 brelse(bp2); 853 break; 854 } 855 case ISO_FTYPE_RRIP: 856 cd9660_rrip_analyze(isodir, ip, imp); 857 break; 858 } 859 860 if (bp != 0) 861 brelse(bp); 862 863 /* 864 * Initialize the associated vnode 865 */ 866 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 867 case VFIFO: 868 vp->v_op = cd9660_fifoop_p; 869 break; 870 case VCHR: 871 case VBLK: 872 /* 873 * if device, look at device number table for translation 874 */ 875 #ifdef ISODEVMAP 876 if ((dp = iso_dmap(dev, ino, 0)) != NULL) 877 ip->inode.iso_rdev = dp->d_dev; 878 #endif 879 vp->v_op = cd9660_specop_p; 880 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 881 /* 882 * Discard unneeded vnode, but save its iso_node. 883 * Note that the lock is carried over in the iso_node 884 * to the replacement vnode. 885 */ 886 nvp->v_data = vp->v_data; 887 vp->v_data = NULL; 888 VOP_UNLOCK(vp, 0); 889 vp->v_op = spec_vnodeop_p; 890 vrele(vp); 891 vgone(vp); 892 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 893 /* 894 * Reinitialize aliased inode. 895 */ 896 vp = nvp; 897 ip->i_vnode = vp; 898 } 899 break; 900 case VLNK: 901 case VNON: 902 case VSOCK: 903 case VDIR: 904 case VBAD: 905 break; 906 case VREG: 907 uvm_vnp_setsize(vp, ip->i_size); 908 break; 909 } 910 911 if (ip->iso_extent == imp->root_extent) 912 vp->v_flag |= VROOT; 913 914 /* 915 * XXX need generation number? 916 */ 917 918 genfs_node_init(vp, &cd9660_genfsops); 919 *vpp = vp; 920 return (0); 921 } 922 923 /* 924 * Vnode pointer to File handle 925 */ 926 /* ARGSUSED */ 927 int 928 cd9660_vptofh(vp, fhp) 929 struct vnode *vp; 930 struct fid *fhp; 931 { 932 struct iso_node *ip = VTOI(vp); 933 struct ifid *ifhp; 934 935 ifhp = (struct ifid *)fhp; 936 ifhp->ifid_len = sizeof(struct ifid); 937 938 ifhp->ifid_ino = ip->i_number; 939 ifhp->ifid_start = ip->iso_start; 940 941 #ifdef ISOFS_DBG 942 printf("vptofh: ino %d, start %ld\n", 943 ifhp->ifid_ino,ifhp->ifid_start); 944 #endif 945 return 0; 946 } 947 948 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 949 { 950 951 sysctl_createv(clog, 0, NULL, NULL, 952 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 953 NULL, 0, NULL, 0, 954 CTL_VFS, CTL_EOL); 955 sysctl_createv(clog, 0, NULL, NULL, 956 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 957 SYSCTL_DESCR("ISO-9660 file system"), 958 NULL, 0, NULL, 0, 959 CTL_VFS, 14, CTL_EOL); 960 961 sysctl_createv(clog, 0, NULL, NULL, 962 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 963 CTLTYPE_INT, "utf8_joliet", 964 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 965 NULL, 0, &cd9660_utf8_joliet, 0, 966 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 967 968 } 969
Indexes created Thu Sep 25 16:09:42 GMT 2025