cd9660_vfsops.c revision 1.35
1 /* $NetBSD: cd9660_vfsops.c,v 1.35 2006/08/28 00:35:22 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 1.35 2006/08/28 00:35:22 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(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 ifh; 669 struct iso_node *ip; 670 struct vnode *nvp; 671 int error; 672 673 if (fhp->fid_len != sizeof(ifh)) 674 return EINVAL; 675 676 memcpy(&ifh, fhp, sizeof(ifh)); 677 #ifdef ISOFS_DBG 678 printf("fhtovp: ino %d, start %ld\n", 679 ifh.ifid_ino, ifh.ifid_start); 680 #endif 681 682 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 683 *vpp = NULLVP; 684 return (error); 685 } 686 ip = VTOI(nvp); 687 if (ip->inode.iso_mode == 0) { 688 vput(nvp); 689 *vpp = NULLVP; 690 return (ESTALE); 691 } 692 *vpp = nvp; 693 return (0); 694 } 695 696 int 697 cd9660_vget(mp, ino, vpp) 698 struct mount *mp; 699 ino_t ino; 700 struct vnode **vpp; 701 { 702 703 /* 704 * XXXX 705 * It would be nice if we didn't always set the `relocated' flag 706 * and force the extra read, but I don't want to think about fixing 707 * that right now. 708 */ 709 return (cd9660_vget_internal(mp, ino, vpp, 710 #if 0 711 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 712 #else 713 0, 714 #endif 715 NULL)); 716 } 717 718 int 719 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 720 struct mount *mp; 721 ino_t ino; 722 struct vnode **vpp; 723 int relocated; 724 struct iso_directory_record *isodir; 725 { 726 struct iso_mnt *imp; 727 struct iso_node *ip; 728 #ifdef ISODEVMAP 729 struct iso_dnode *dp; 730 #endif 731 struct buf *bp; 732 struct vnode *vp, *nvp; 733 dev_t dev; 734 int error; 735 736 imp = VFSTOISOFS(mp); 737 dev = imp->im_dev; 738 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 739 return (0); 740 741 /* Allocate a new vnode/iso_node. */ 742 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 743 *vpp = NULLVP; 744 return (error); 745 } 746 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 747 memset(ip, 0, sizeof(struct iso_node)); 748 vp->v_data = ip; 749 ip->i_vnode = vp; 750 ip->i_dev = dev; 751 ip->i_number = ino; 752 753 /* 754 * Put it onto its hash chain and lock it so that other requests for 755 * this inode will block if they arrive while we are sleeping waiting 756 * for old data structures to be purged or for the contents of the 757 * disk portion of this inode to be read. 758 */ 759 cd9660_ihashins(ip); 760 761 if (isodir == 0) { 762 int lbn, off; 763 764 lbn = lblkno(imp, ino); 765 if (lbn >= imp->volume_space_size) { 766 vput(vp); 767 printf("fhtovp: lbn exceed volume space %d\n", lbn); 768 return (ESTALE); 769 } 770 771 off = blkoff(imp, ino); 772 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 773 vput(vp); 774 printf("fhtovp: crosses block boundary %d\n", 775 off + ISO_DIRECTORY_RECORD_SIZE); 776 return (ESTALE); 777 } 778 779 error = bread(imp->im_devvp, 780 lbn << (imp->im_bshift - DEV_BSHIFT), 781 imp->logical_block_size, NOCRED, &bp); 782 if (error) { 783 vput(vp); 784 brelse(bp); 785 printf("fhtovp: bread error %d\n",error); 786 return (error); 787 } 788 isodir = (struct iso_directory_record *)(bp->b_data + off); 789 790 if (off + isonum_711(isodir->length) > 791 imp->logical_block_size) { 792 vput(vp); 793 if (bp != 0) 794 brelse(bp); 795 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 796 off +isonum_711(isodir->length), off, 797 isonum_711(isodir->length)); 798 return (ESTALE); 799 } 800 801 #if 0 802 if (isonum_733(isodir->extent) + 803 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 804 if (bp != 0) 805 brelse(bp); 806 printf("fhtovp: file start miss %d vs %d\n", 807 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 808 ifhp->ifid_start); 809 return (ESTALE); 810 } 811 #endif 812 } else 813 bp = 0; 814 815 ip->i_mnt = imp; 816 ip->i_devvp = imp->im_devvp; 817 VREF(ip->i_devvp); 818 819 if (relocated) { 820 /* 821 * On relocated directories we must 822 * read the `.' entry out of a dir. 823 */ 824 ip->iso_start = ino >> imp->im_bshift; 825 if (bp != 0) 826 brelse(bp); 827 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 828 vput(vp); 829 return (error); 830 } 831 isodir = (struct iso_directory_record *)bp->b_data; 832 } 833 834 ip->iso_extent = isonum_733(isodir->extent); 835 ip->i_size = isonum_733(isodir->size); 836 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 837 838 /* 839 * Setup time stamp, attribute 840 */ 841 vp->v_type = VNON; 842 switch (imp->iso_ftype) { 843 default: /* ISO_FTYPE_9660 */ 844 { 845 struct buf *bp2; 846 int off; 847 if ((imp->im_flags & ISOFSMNT_EXTATT) 848 && (off = isonum_711(isodir->ext_attr_length))) 849 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 850 NULL, &bp2); 851 else 852 bp2 = NULL; 853 cd9660_defattr(isodir, ip, bp2); 854 cd9660_deftstamp(isodir, ip, bp2); 855 if (bp2) 856 brelse(bp2); 857 break; 858 } 859 case ISO_FTYPE_RRIP: 860 cd9660_rrip_analyze(isodir, ip, imp); 861 break; 862 } 863 864 if (bp != 0) 865 brelse(bp); 866 867 /* 868 * Initialize the associated vnode 869 */ 870 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 871 case VFIFO: 872 vp->v_op = cd9660_fifoop_p; 873 break; 874 case VCHR: 875 case VBLK: 876 /* 877 * if device, look at device number table for translation 878 */ 879 #ifdef ISODEVMAP 880 if ((dp = iso_dmap(dev, ino, 0)) != NULL) 881 ip->inode.iso_rdev = dp->d_dev; 882 #endif 883 vp->v_op = cd9660_specop_p; 884 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 885 /* 886 * Discard unneeded vnode, but save its iso_node. 887 * Note that the lock is carried over in the iso_node 888 * to the replacement vnode. 889 */ 890 nvp->v_data = vp->v_data; 891 vp->v_data = NULL; 892 VOP_UNLOCK(vp, 0); 893 vp->v_op = spec_vnodeop_p; 894 vrele(vp); 895 vgone(vp); 896 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 897 /* 898 * Reinitialize aliased inode. 899 */ 900 vp = nvp; 901 ip->i_vnode = vp; 902 } 903 break; 904 case VLNK: 905 case VNON: 906 case VSOCK: 907 case VDIR: 908 case VBAD: 909 break; 910 case VREG: 911 uvm_vnp_setsize(vp, ip->i_size); 912 break; 913 } 914 915 if (ip->iso_extent == imp->root_extent) 916 vp->v_flag |= VROOT; 917 918 /* 919 * XXX need generation number? 920 */ 921 922 genfs_node_init(vp, &cd9660_genfsops); 923 *vpp = vp; 924 return (0); 925 } 926 927 /* 928 * Vnode pointer to File handle 929 */ 930 /* ARGSUSED */ 931 int 932 cd9660_vptofh(vp, fhp, fh_size) 933 struct vnode *vp; 934 struct fid *fhp; 935 size_t *fh_size; 936 { 937 struct iso_node *ip = VTOI(vp); 938 struct ifid ifh; 939 940 if (*fh_size < sizeof(struct ifid)) { 941 *fh_size = sizeof(struct ifid); 942 return E2BIG; 943 } 944 *fh_size = sizeof(struct ifid); 945 946 memset(&ifh, 0, sizeof(ifh)); 947 ifh.ifid_len = sizeof(struct ifid); 948 ifh.ifid_ino = ip->i_number; 949 ifh.ifid_start = ip->iso_start; 950 memcpy(fhp, &ifh, sizeof(ifh)); 951 952 #ifdef ISOFS_DBG 953 printf("vptofh: ino %d, start %ld\n", 954 ifh.ifid_ino,ifh.ifid_start); 955 #endif 956 return 0; 957 } 958 959 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 960 { 961 962 sysctl_createv(clog, 0, NULL, NULL, 963 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 964 NULL, 0, NULL, 0, 965 CTL_VFS, CTL_EOL); 966 sysctl_createv(clog, 0, NULL, NULL, 967 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 968 SYSCTL_DESCR("ISO-9660 file system"), 969 NULL, 0, NULL, 0, 970 CTL_VFS, 14, CTL_EOL); 971 972 sysctl_createv(clog, 0, NULL, NULL, 973 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 974 CTLTYPE_INT, "utf8_joliet", 975 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 976 NULL, 0, &cd9660_utf8_joliet, 0, 977 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 978 979 } 980
Indexes created Thu Sep 25 16:09:42 GMT 2025