cd9660_vfsops.c revision 1.8.2.9
1 /* $NetBSD: cd9660_vfsops.c,v 1.8.2.9 2005/03/04 16:51:29 skrll 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 1.8.2.9 2005/03/04 16:51:29 skrll 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 68 #include <fs/cd9660/iso.h> 69 #include <fs/cd9660/cd9660_extern.h> 70 #include <fs/cd9660/iso_rrip.h> 71 #include <fs/cd9660/cd9660_node.h> 72 #include <fs/cd9660/cd9660_mount.h> 73 74 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 75 76 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 77 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 78 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 79 80 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 81 &cd9660_vnodeop_opv_desc, 82 &cd9660_specop_opv_desc, 83 &cd9660_fifoop_opv_desc, 84 NULL, 85 }; 86 87 struct vfsops cd9660_vfsops = { 88 MOUNT_CD9660, 89 cd9660_mount, 90 cd9660_start, 91 cd9660_unmount, 92 cd9660_root, 93 cd9660_quotactl, 94 cd9660_statvfs, 95 cd9660_sync, 96 cd9660_vget, 97 cd9660_fhtovp, 98 cd9660_vptofh, 99 cd9660_init, 100 cd9660_reinit, 101 cd9660_done, 102 NULL, 103 cd9660_mountroot, 104 cd9660_check_export, 105 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 106 vfs_stdextattrctl, 107 cd9660_vnodeopv_descs, 108 }; 109 110 struct genfs_ops cd9660_genfsops = { 111 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 __P((struct iso_mnt *isomp, struct buf *bp, int *ea_len)); 122 static int iso_mountfs __P((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 (root_device->dv_class != 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 = NULL; 175 176 p = l->l_proc; 177 if (mp->mnt_flag & MNT_GETARGS) { 178 imp = VFSTOISOFS(mp); 179 if (imp == NULL) 180 return EIO; 181 args.fspec = NULL; 182 args.flags = imp->im_flags; 183 vfs_showexport(mp, &args.export, &imp->im_export); 184 return copyout(&args, data, sizeof(args)); 185 } 186 error = copyin(data, &args, sizeof (struct iso_args)); 187 if (error) 188 return (error); 189 190 if ((mp->mnt_flag & MNT_RDONLY) == 0) 191 return (EROFS); 192 193 /* 194 * If updating, check whether changing from read-only to 195 * read/write; if there is no device name, that's all we do. 196 */ 197 if (mp->mnt_flag & MNT_UPDATE) { 198 imp = VFSTOISOFS(mp); 199 if (args.fspec == 0) 200 return (vfs_export(mp, &imp->im_export, &args.export)); 201 } 202 /* 203 * Not an update, or updating the name: look up the name 204 * and verify that it refers to a sensible block device. 205 */ 206 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 207 if ((error = namei(ndp)) != 0) 208 return (error); 209 devvp = ndp->ni_vp; 210 211 if (devvp->v_type != VBLK) { 212 vrele(devvp); 213 return ENOTBLK; 214 } 215 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 216 vrele(devvp); 217 return ENXIO; 218 } 219 /* 220 * If mount by non-root, then verify that user has necessary 221 * permissions on the device. 222 */ 223 if (p->p_ucred->cr_uid != 0) { 224 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 225 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, l); 226 VOP_UNLOCK(devvp, 0); 227 if (error) { 228 vrele(devvp); 229 return (error); 230 } 231 } 232 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 233 /* 234 * Disallow multiple mounts of the same device. 235 * Disallow mounting of a device that is currently in use 236 * (except for root, which might share swap device for 237 * miniroot). 238 */ 239 error = vfs_mountedon(devvp); 240 if (error) 241 goto fail; 242 if (vcount(devvp) > 1 && devvp != rootvp) { 243 error = EBUSY; 244 goto fail; 245 } 246 error = VOP_OPEN(devvp, FREAD, FSCRED, l); 247 if (error) 248 goto fail; 249 error = iso_mountfs(devvp, mp, l, &args); 250 if (error) { 251 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 252 (void)VOP_CLOSE(devvp, FREAD, NOCRED, l); 253 VOP_UNLOCK(devvp, 0); 254 goto fail; 255 } 256 } else { 257 vrele(devvp); 258 if (devvp != imp->im_devvp) 259 return (EINVAL); /* needs translation */ 260 } 261 imp = VFSTOISOFS(mp); 262 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 263 mp, l); 264 265 fail: 266 vrele(devvp); 267 return (error); 268 } 269 270 /* 271 * Make a mount point from a volume descriptor 272 */ 273 static int 274 iso_makemp(isomp, bp, ea_len) 275 struct iso_mnt *isomp; 276 struct buf *bp; 277 int *ea_len; 278 { 279 struct iso_primary_descriptor *pri; 280 int logical_block_size; 281 struct iso_directory_record *rootp; 282 283 pri = (struct iso_primary_descriptor *)bp->b_data; 284 285 logical_block_size = isonum_723 (pri->logical_block_size); 286 287 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 288 || (logical_block_size & (logical_block_size - 1)) != 0) 289 return -1; 290 291 rootp = (struct iso_directory_record *)pri->root_directory_record; 292 293 isomp->logical_block_size = logical_block_size; 294 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 295 memcpy(isomp->root, rootp, sizeof(isomp->root)); 296 isomp->root_extent = isonum_733 (rootp->extent); 297 isomp->root_size = isonum_733 (rootp->size); 298 isomp->im_joliet_level = 0; 299 300 isomp->im_bmask = logical_block_size - 1; 301 isomp->im_bshift = 0; 302 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 303 isomp->im_bshift++; 304 305 if (ea_len != NULL) 306 *ea_len = isonum_711(rootp->ext_attr_length); 307 308 return 0; 309 } 310 311 /* 312 * Common code for mount and mountroot 313 */ 314 static int 315 iso_mountfs(devvp, mp, l, argp) 316 struct vnode *devvp; 317 struct mount *mp; 318 struct lwp *l; 319 struct iso_args *argp; 320 { 321 struct iso_mnt *isomp = (struct iso_mnt *)0; 322 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 323 dev_t dev = devvp->v_rdev; 324 int error = EINVAL; 325 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 326 int iso_bsize; 327 int iso_blknum; 328 int joliet_level; 329 struct iso_volume_descriptor *vdp; 330 struct iso_supplementary_descriptor *sup; 331 int sess = 0; 332 int ext_attr_length; 333 struct disklabel label; 334 335 if (!ronly) 336 return EROFS; 337 338 /* Flush out any old buffers remaining from a previous use. */ 339 if ((error = vinvalbuf(devvp, V_SAVE, l->l_proc->p_ucred, l, 0, 0)) != 0) 340 return (error); 341 342 /* This is the "logical sector size". The standard says this 343 * should be 2048 or the physical sector size on the device, 344 * whichever is greater. For now, we'll just use a constant. 345 */ 346 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 347 348 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, l); 349 if (!error && 350 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 351 /* XXX more sanity checks? */ 352 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 353 } else { 354 /* fallback to old method */ 355 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, l); 356 if (error) 357 sess = 0; /* never mind */ 358 } 359 #ifdef ISO_DEBUG 360 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 361 #endif 362 363 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 364 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 365 iso_bsize, NOCRED, &bp)) != 0) 366 goto out; 367 368 vdp = (struct iso_volume_descriptor *)bp->b_data; 369 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 370 error = EINVAL; 371 goto out; 372 } 373 374 switch (isonum_711(vdp->type)) { 375 case ISO_VD_PRIMARY: 376 if (pribp == NULL) { 377 pribp = bp; 378 bp = NULL; 379 } 380 break; 381 382 case ISO_VD_SUPPLEMENTARY: 383 if (supbp == NULL) { 384 supbp = bp; 385 bp = NULL; 386 } 387 break; 388 389 default: 390 break; 391 } 392 393 if (isonum_711 (vdp->type) == ISO_VD_END) { 394 brelse(bp); 395 bp = NULL; 396 break; 397 } 398 399 if (bp != NULL) { 400 brelse(bp); 401 bp = NULL; 402 } 403 } 404 405 if (pribp == NULL) { 406 error = EINVAL; 407 goto out; 408 } 409 410 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 411 memset(isomp, 0, sizeof *isomp); 412 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 413 error = EINVAL; 414 goto out; 415 } 416 417 isomp->volume_space_size += sess; 418 419 pribp->b_flags |= B_AGE; 420 brelse(pribp); 421 pribp = NULL; 422 423 mp->mnt_data = isomp; 424 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 425 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 426 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 427 mp->mnt_stat.f_namemax = MAXNAMLEN; 428 mp->mnt_flag |= MNT_LOCAL; 429 mp->mnt_dev_bshift = iso_bsize; 430 mp->mnt_fs_bshift = isomp->im_bshift; 431 isomp->im_mountp = mp; 432 isomp->im_dev = dev; 433 isomp->im_devvp = devvp; 434 435 devvp->v_specmountpoint = mp; 436 437 /* Check the Rock Ridge Extension support */ 438 if (!(argp->flags & ISOFSMNT_NORRIP)) { 439 struct iso_directory_record *rootp; 440 441 if ((error = bread(isomp->im_devvp, 442 (isomp->root_extent + ext_attr_length) << 443 (isomp->im_bshift - DEV_BSHIFT), 444 isomp->logical_block_size, NOCRED, 445 &bp)) != 0) 446 goto out; 447 448 rootp = (struct iso_directory_record *)bp->b_data; 449 450 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 451 argp->flags |= ISOFSMNT_NORRIP; 452 } else { 453 argp->flags &= ~ISOFSMNT_GENS; 454 } 455 456 /* 457 * The contents are valid, 458 * but they will get reread as part of another vnode, so... 459 */ 460 bp->b_flags |= B_AGE; 461 brelse(bp); 462 bp = NULL; 463 } 464 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 465 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 466 467 if (isomp->im_flags & ISOFSMNT_GENS) 468 isomp->iso_ftype = ISO_FTYPE_9660; 469 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 470 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 471 if (argp->flags & ISOFSMNT_NOCASETRANS) 472 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 473 } else 474 isomp->iso_ftype = ISO_FTYPE_RRIP; 475 476 /* Check the Joliet Extension support */ 477 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 478 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 479 supbp != NULL) { 480 joliet_level = 0; 481 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 482 483 if ((isonum_711(sup->flags) & 1) == 0) { 484 if (memcmp(sup->escape, "%/@", 3) == 0) 485 joliet_level = 1; 486 if (memcmp(sup->escape, "%/C", 3) == 0) 487 joliet_level = 2; 488 if (memcmp(sup->escape, "%/E", 3) == 0) 489 joliet_level = 3; 490 } 491 if (joliet_level != 0) { 492 if (iso_makemp(isomp, supbp, NULL) == -1) { 493 error = EINVAL; 494 goto out; 495 } 496 isomp->im_joliet_level = joliet_level; 497 } 498 } 499 500 if (supbp != NULL) { 501 brelse(supbp); 502 supbp = NULL; 503 } 504 505 return 0; 506 out: 507 if (bp) 508 brelse(bp); 509 if (pribp) 510 brelse(pribp); 511 if (supbp) 512 brelse(supbp); 513 if (isomp) { 514 free(isomp, M_ISOFSMNT); 515 mp->mnt_data = NULL; 516 } 517 return error; 518 } 519 520 /* 521 * Make a filesystem operational. 522 * Nothing to do at the moment. 523 */ 524 /* ARGSUSED */ 525 int 526 cd9660_start(mp, flags, l) 527 struct mount *mp; 528 int flags; 529 struct lwp *l; 530 { 531 return 0; 532 } 533 534 /* 535 * unmount system call 536 */ 537 int 538 cd9660_unmount(mp, mntflags, l) 539 struct mount *mp; 540 int mntflags; 541 struct lwp *l; 542 { 543 struct iso_mnt *isomp; 544 int error, flags = 0; 545 546 if (mntflags & MNT_FORCE) 547 flags |= FORCECLOSE; 548 #if 0 549 mntflushbuf(mp, 0); 550 if (mntinvalbuf(mp)) 551 return EBUSY; 552 #endif 553 if ((error = vflush(mp, NULLVP, flags)) != 0) 554 return (error); 555 556 isomp = VFSTOISOFS(mp); 557 558 #ifdef ISODEVMAP 559 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 560 iso_dunmap(isomp->im_dev); 561 #endif 562 563 if (isomp->im_devvp->v_type != VBAD) 564 isomp->im_devvp->v_specmountpoint = NULL; 565 566 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 567 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, l); 568 vput(isomp->im_devvp); 569 free(isomp, M_ISOFSMNT); 570 mp->mnt_data = NULL; 571 mp->mnt_flag &= ~MNT_LOCAL; 572 return (error); 573 } 574 575 /* 576 * Return root of a filesystem 577 */ 578 int 579 cd9660_root(mp, vpp) 580 struct mount *mp; 581 struct vnode **vpp; 582 { 583 struct iso_mnt *imp = VFSTOISOFS(mp); 584 struct iso_directory_record *dp = 585 (struct iso_directory_record *)imp->root; 586 ino_t ino = isodirino(dp, imp); 587 588 /* 589 * With RRIP we must use the `.' entry of the root directory. 590 * Simply tell vget, that it's a relocated directory. 591 */ 592 return (cd9660_vget_internal(mp, ino, vpp, 593 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 594 } 595 596 /* 597 * Do operations associated with quotas, not supported 598 */ 599 /* ARGSUSED */ 600 int 601 cd9660_quotactl(mp, cmd, uid, arg, l) 602 struct mount *mp; 603 int cmd; 604 uid_t uid; 605 void *arg; 606 struct lwp *l; 607 { 608 609 return (EOPNOTSUPP); 610 } 611 612 /* 613 * Get file system statistics. 614 */ 615 int 616 cd9660_statvfs(mp, sbp, l) 617 struct mount *mp; 618 struct statvfs *sbp; 619 struct lwp *l; 620 { 621 struct iso_mnt *isomp; 622 623 isomp = VFSTOISOFS(mp); 624 625 sbp->f_bsize = isomp->logical_block_size; 626 sbp->f_frsize = sbp->f_bsize; 627 sbp->f_iosize = sbp->f_bsize; /* XXX */ 628 sbp->f_blocks = isomp->volume_space_size; 629 sbp->f_bfree = 0; /* total free blocks */ 630 sbp->f_bavail = 0; /* blocks free for non superuser */ 631 sbp->f_bresvd = 0; /* total reserved blocks */ 632 sbp->f_files = 0; /* total files */ 633 sbp->f_ffree = 0; /* free file nodes */ 634 sbp->f_favail = 0; /* free file nodes */ 635 sbp->f_fresvd = 0; /* reserved file nodes */ 636 copy_statvfs_info(sbp, mp); 637 /* Use the first spare for flags: */ 638 sbp->f_spare[0] = isomp->im_flags; 639 return 0; 640 } 641 642 /* ARGSUSED */ 643 int 644 cd9660_sync(mp, waitfor, cred, l) 645 struct mount *mp; 646 int waitfor; 647 struct ucred *cred; 648 struct lwp *l; 649 { 650 return (0); 651 } 652 653 /* 654 * File handle to vnode 655 * 656 * Have to be really careful about stale file handles: 657 * - check that the inode number is in range 658 * - call iget() to get the locked inode 659 * - check for an unallocated inode (i_mode == 0) 660 * - check that the generation number matches 661 */ 662 663 struct ifid { 664 ushort ifid_len; 665 ushort ifid_pad; 666 int ifid_ino; 667 long ifid_start; 668 }; 669 670 /* ARGSUSED */ 671 int 672 cd9660_fhtovp(mp, fhp, vpp) 673 struct mount *mp; 674 struct fid *fhp; 675 struct vnode **vpp; 676 { 677 struct ifid *ifhp = (struct ifid *)fhp; 678 struct iso_node *ip; 679 struct vnode *nvp; 680 int error; 681 682 #ifdef ISOFS_DBG 683 printf("fhtovp: ino %d, start %ld\n", 684 ifhp->ifid_ino, ifhp->ifid_start); 685 #endif 686 687 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 688 *vpp = NULLVP; 689 return (error); 690 } 691 ip = VTOI(nvp); 692 if (ip->inode.iso_mode == 0) { 693 vput(nvp); 694 *vpp = NULLVP; 695 return (ESTALE); 696 } 697 *vpp = nvp; 698 return (0); 699 } 700 701 /* ARGSUSED */ 702 int 703 cd9660_check_export(mp, nam, exflagsp, credanonp) 704 struct mount *mp; 705 struct mbuf *nam; 706 int *exflagsp; 707 struct ucred **credanonp; 708 { 709 struct netcred *np; 710 struct iso_mnt *imp = VFSTOISOFS(mp); 711 712 #ifdef ISOFS_DBG 713 printf("check_export: ino %d, start %ld\n", 714 ifhp->ifid_ino, ifhp->ifid_start); 715 #endif 716 717 /* 718 * Get the export permission structure for this <mp, client> tuple. 719 */ 720 np = vfs_export_lookup(mp, &imp->im_export, nam); 721 if (np == NULL) 722 return (EACCES); 723 724 *exflagsp = np->netc_exflags; 725 *credanonp = &np->netc_anon; 726 return (0); 727 } 728 729 int 730 cd9660_vget(mp, ino, vpp) 731 struct mount *mp; 732 ino_t ino; 733 struct vnode **vpp; 734 { 735 736 /* 737 * XXXX 738 * It would be nice if we didn't always set the `relocated' flag 739 * and force the extra read, but I don't want to think about fixing 740 * that right now. 741 */ 742 return (cd9660_vget_internal(mp, ino, vpp, 743 #if 0 744 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 745 #else 746 0, 747 #endif 748 NULL)); 749 } 750 751 int 752 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 753 struct mount *mp; 754 ino_t ino; 755 struct vnode **vpp; 756 int relocated; 757 struct iso_directory_record *isodir; 758 { 759 struct iso_mnt *imp; 760 struct iso_node *ip; 761 #ifdef ISODEVMAP 762 struct iso_dnode *dp; 763 #endif 764 struct buf *bp; 765 struct vnode *vp, *nvp; 766 dev_t dev; 767 int error; 768 769 imp = VFSTOISOFS(mp); 770 dev = imp->im_dev; 771 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 772 return (0); 773 774 /* Allocate a new vnode/iso_node. */ 775 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 776 *vpp = NULLVP; 777 return (error); 778 } 779 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 780 memset(ip, 0, sizeof(struct iso_node)); 781 vp->v_data = ip; 782 ip->i_vnode = vp; 783 ip->i_dev = dev; 784 ip->i_number = ino; 785 786 /* 787 * Put it onto its hash chain and lock it so that other requests for 788 * this inode will block if they arrive while we are sleeping waiting 789 * for old data structures to be purged or for the contents of the 790 * disk portion of this inode to be read. 791 */ 792 cd9660_ihashins(ip); 793 794 if (isodir == 0) { 795 int lbn, off; 796 797 lbn = lblkno(imp, ino); 798 if (lbn >= imp->volume_space_size) { 799 vput(vp); 800 printf("fhtovp: lbn exceed volume space %d\n", lbn); 801 return (ESTALE); 802 } 803 804 off = blkoff(imp, ino); 805 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 806 vput(vp); 807 printf("fhtovp: crosses block boundary %d\n", 808 off + ISO_DIRECTORY_RECORD_SIZE); 809 return (ESTALE); 810 } 811 812 error = bread(imp->im_devvp, 813 lbn << (imp->im_bshift - DEV_BSHIFT), 814 imp->logical_block_size, NOCRED, &bp); 815 if (error) { 816 vput(vp); 817 brelse(bp); 818 printf("fhtovp: bread error %d\n",error); 819 return (error); 820 } 821 isodir = (struct iso_directory_record *)(bp->b_data + off); 822 823 if (off + isonum_711(isodir->length) > 824 imp->logical_block_size) { 825 vput(vp); 826 if (bp != 0) 827 brelse(bp); 828 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 829 off +isonum_711(isodir->length), off, 830 isonum_711(isodir->length)); 831 return (ESTALE); 832 } 833 834 #if 0 835 if (isonum_733(isodir->extent) + 836 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 837 if (bp != 0) 838 brelse(bp); 839 printf("fhtovp: file start miss %d vs %d\n", 840 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 841 ifhp->ifid_start); 842 return (ESTALE); 843 } 844 #endif 845 } else 846 bp = 0; 847 848 ip->i_mnt = imp; 849 ip->i_devvp = imp->im_devvp; 850 VREF(ip->i_devvp); 851 852 if (relocated) { 853 /* 854 * On relocated directories we must 855 * read the `.' entry out of a dir. 856 */ 857 ip->iso_start = ino >> imp->im_bshift; 858 if (bp != 0) 859 brelse(bp); 860 if ((error = VOP_BLKATOFF(vp, (off_t)0, NULL, &bp)) != 0) { 861 vput(vp); 862 return (error); 863 } 864 isodir = (struct iso_directory_record *)bp->b_data; 865 } 866 867 ip->iso_extent = isonum_733(isodir->extent); 868 ip->i_size = isonum_733(isodir->size); 869 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 870 871 /* 872 * Setup time stamp, attribute 873 */ 874 vp->v_type = VNON; 875 switch (imp->iso_ftype) { 876 default: /* ISO_FTYPE_9660 */ 877 { 878 struct buf *bp2; 879 int off; 880 if ((imp->im_flags & ISOFSMNT_EXTATT) 881 && (off = isonum_711(isodir->ext_attr_length))) 882 VOP_BLKATOFF(vp, (off_t)-(off << imp->im_bshift), NULL, 883 &bp2); 884 else 885 bp2 = NULL; 886 cd9660_defattr(isodir, ip, bp2); 887 cd9660_deftstamp(isodir, ip, bp2); 888 if (bp2) 889 brelse(bp2); 890 break; 891 } 892 case ISO_FTYPE_RRIP: 893 cd9660_rrip_analyze(isodir, ip, imp); 894 break; 895 } 896 897 if (bp != 0) 898 brelse(bp); 899 900 /* 901 * Initialize the associated vnode 902 */ 903 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 904 case VFIFO: 905 vp->v_op = cd9660_fifoop_p; 906 break; 907 case VCHR: 908 case VBLK: 909 /* 910 * if device, look at device number table for translation 911 */ 912 #ifdef ISODEVMAP 913 if ((dp = iso_dmap(dev, ino, 0)) != NULL) 914 ip->inode.iso_rdev = dp->d_dev; 915 #endif 916 vp->v_op = cd9660_specop_p; 917 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 918 /* 919 * Discard unneeded vnode, but save its iso_node. 920 * Note that the lock is carried over in the iso_node 921 * to the replacement vnode. 922 */ 923 nvp->v_data = vp->v_data; 924 vp->v_data = NULL; 925 VOP_UNLOCK(vp, 0); 926 vp->v_op = spec_vnodeop_p; 927 vrele(vp); 928 vgone(vp); 929 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 930 /* 931 * Reinitialize aliased inode. 932 */ 933 vp = nvp; 934 ip->i_vnode = vp; 935 } 936 break; 937 case VLNK: 938 case VNON: 939 case VSOCK: 940 case VDIR: 941 case VBAD: 942 break; 943 case VREG: 944 uvm_vnp_setsize(vp, ip->i_size); 945 break; 946 } 947 948 if (ip->iso_extent == imp->root_extent) 949 vp->v_flag |= VROOT; 950 951 /* 952 * XXX need generation number? 953 */ 954 955 genfs_node_init(vp, &cd9660_genfsops); 956 *vpp = vp; 957 return (0); 958 } 959 960 /* 961 * Vnode pointer to File handle 962 */ 963 /* ARGSUSED */ 964 int 965 cd9660_vptofh(vp, fhp) 966 struct vnode *vp; 967 struct fid *fhp; 968 { 969 struct iso_node *ip = VTOI(vp); 970 struct ifid *ifhp; 971 972 ifhp = (struct ifid *)fhp; 973 ifhp->ifid_len = sizeof(struct ifid); 974 975 ifhp->ifid_ino = ip->i_number; 976 ifhp->ifid_start = ip->iso_start; 977 978 #ifdef ISOFS_DBG 979 printf("vptofh: ino %d, start %ld\n", 980 ifhp->ifid_ino,ifhp->ifid_start); 981 #endif 982 return 0; 983 } 984 985 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 986 { 987 988 sysctl_createv(clog, 0, NULL, NULL, 989 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 990 NULL, 0, NULL, 0, 991 CTL_VFS, CTL_EOL); 992 sysctl_createv(clog, 0, NULL, NULL, 993 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 994 SYSCTL_DESCR("ISO-9660 file system"), 995 NULL, 0, NULL, 0, 996 CTL_VFS, 14, CTL_EOL); 997 998 sysctl_createv(clog, 0, NULL, NULL, 999 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1000 CTLTYPE_INT, "utf8_joliet", 1001 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 1002 NULL, 0, &cd9660_utf8_joliet, 0, 1003 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 1004 1005 } 1006
Indexes created Sat Oct 18 17:09:52 GMT 2025