cd9660_vfsops.c revision 1.21
1 /* $NetBSD: cd9660_vfsops.c,v 1.21 2005/01/09 03:11:48 mycroft 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 1.21 2005/01/09 03:11:48 mycroft 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 proc *p, struct iso_args *argp)); 124 125 int 126 cd9660_mountroot() 127 { 128 struct mount *mp; 129 struct proc *p = curproc; /* 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, p, &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, p); 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, p) 164 struct mount *mp; 165 const char *path; 166 void *data; 167 struct nameidata *ndp; 168 struct proc *p; 169 { 170 struct vnode *devvp; 171 struct iso_args args; 172 int error; 173 struct iso_mnt *imp = NULL; 174 175 if (mp->mnt_flag & MNT_GETARGS) { 176 imp = VFSTOISOFS(mp); 177 if (imp == NULL) 178 return EIO; 179 args.fspec = NULL; 180 args.flags = imp->im_flags; 181 vfs_showexport(mp, &args.export, &imp->im_export); 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 /* 192 * If updating, check whether changing from read-only to 193 * read/write; if there is no device name, that's all we do. 194 */ 195 if (mp->mnt_flag & MNT_UPDATE) { 196 imp = VFSTOISOFS(mp); 197 if (args.fspec == 0) 198 return (vfs_export(mp, &imp->im_export, &args.export)); 199 } 200 /* 201 * Not an update, or updating the name: look up the name 202 * and verify that it refers to a sensible block device. 203 */ 204 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 205 if ((error = namei(ndp)) != 0) 206 return (error); 207 devvp = ndp->ni_vp; 208 209 if (devvp->v_type != VBLK) { 210 vrele(devvp); 211 return ENOTBLK; 212 } 213 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 214 vrele(devvp); 215 return ENXIO; 216 } 217 /* 218 * If mount by non-root, then verify that user has necessary 219 * permissions on the device. 220 */ 221 if (p->p_ucred->cr_uid != 0) { 222 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 223 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 224 VOP_UNLOCK(devvp, 0); 225 if (error) { 226 vrele(devvp); 227 return (error); 228 } 229 } 230 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 231 /* 232 * Disallow multiple mounts of the same device. 233 * Disallow mounting of a device that is currently in use 234 * (except for root, which might share swap device for 235 * miniroot). 236 */ 237 error = vfs_mountedon(devvp); 238 if (error) 239 goto fail; 240 if (vcount(devvp) > 1 && devvp != rootvp) { 241 error = EBUSY; 242 goto fail; 243 } 244 error = VOP_OPEN(devvp, FREAD, FSCRED, p); 245 if (error) 246 goto fail; 247 error = iso_mountfs(devvp, mp, p, &args); 248 if (error) { 249 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 250 (void)VOP_CLOSE(devvp, FREAD, NOCRED, p); 251 VOP_UNLOCK(devvp, 0); 252 goto fail; 253 } 254 } else { 255 vrele(devvp); 256 if (devvp != imp->im_devvp) 257 return (EINVAL); /* needs translation */ 258 } 259 imp = VFSTOISOFS(mp); 260 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 261 mp, p); 262 263 fail: 264 vrele(devvp); 265 return (error); 266 } 267 268 /* 269 * Make a mount point from a volume descriptor 270 */ 271 static int 272 iso_makemp(isomp, bp, ea_len) 273 struct iso_mnt *isomp; 274 struct buf *bp; 275 int *ea_len; 276 { 277 struct iso_primary_descriptor *pri; 278 int logical_block_size; 279 struct iso_directory_record *rootp; 280 281 pri = (struct iso_primary_descriptor *)bp->b_data; 282 283 logical_block_size = isonum_723 (pri->logical_block_size); 284 285 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 286 || (logical_block_size & (logical_block_size - 1)) != 0) 287 return -1; 288 289 rootp = (struct iso_directory_record *)pri->root_directory_record; 290 291 isomp->logical_block_size = logical_block_size; 292 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 293 memcpy(isomp->root, rootp, sizeof(isomp->root)); 294 isomp->root_extent = isonum_733 (rootp->extent); 295 isomp->root_size = isonum_733 (rootp->size); 296 isomp->im_joliet_level = 0; 297 298 isomp->im_bmask = logical_block_size - 1; 299 isomp->im_bshift = 0; 300 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 301 isomp->im_bshift++; 302 303 if (ea_len != NULL) 304 *ea_len = isonum_711(rootp->ext_attr_length); 305 306 return 0; 307 } 308 309 /* 310 * Common code for mount and mountroot 311 */ 312 static int 313 iso_mountfs(devvp, mp, p, argp) 314 struct vnode *devvp; 315 struct mount *mp; 316 struct proc *p; 317 struct iso_args *argp; 318 { 319 struct iso_mnt *isomp = (struct iso_mnt *)0; 320 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 321 dev_t dev = devvp->v_rdev; 322 int error = EINVAL; 323 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 324 int iso_bsize; 325 int iso_blknum; 326 int joliet_level; 327 struct iso_volume_descriptor *vdp; 328 struct iso_supplementary_descriptor *sup; 329 int sess = 0; 330 int ext_attr_length; 331 struct disklabel label; 332 333 if (!ronly) 334 return EROFS; 335 336 /* Flush out any old buffers remaining from a previous use. */ 337 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 338 return (error); 339 340 /* This is the "logical sector size". The standard says this 341 * should be 2048 or the physical sector size on the device, 342 * whichever is greater. For now, we'll just use a constant. 343 */ 344 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 345 346 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, p); 347 if (!error && 348 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 349 /* XXX more sanity checks? */ 350 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 351 } else { 352 /* fallback to old method */ 353 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, p); 354 if (error) 355 sess = 0; /* never mind */ 356 } 357 #ifdef ISO_DEBUG 358 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 359 #endif 360 361 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 362 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 363 iso_bsize, NOCRED, &bp)) != 0) 364 goto out; 365 366 vdp = (struct iso_volume_descriptor *)bp->b_data; 367 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 368 error = EINVAL; 369 goto out; 370 } 371 372 switch (isonum_711(vdp->type)) { 373 case ISO_VD_PRIMARY: 374 if (pribp == NULL) { 375 pribp = bp; 376 bp = NULL; 377 } 378 break; 379 380 case ISO_VD_SUPPLEMENTARY: 381 if (supbp == NULL) { 382 supbp = bp; 383 bp = NULL; 384 } 385 break; 386 387 default: 388 break; 389 } 390 391 if (isonum_711 (vdp->type) == ISO_VD_END) { 392 brelse(bp); 393 bp = NULL; 394 break; 395 } 396 397 if (bp != NULL) { 398 brelse(bp); 399 bp = NULL; 400 } 401 } 402 403 if (pribp == NULL) { 404 error = EINVAL; 405 goto out; 406 } 407 408 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 409 memset(isomp, 0, sizeof *isomp); 410 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 411 error = EINVAL; 412 goto out; 413 } 414 415 isomp->volume_space_size += sess; 416 417 pribp->b_flags |= B_AGE; 418 brelse(pribp); 419 pribp = NULL; 420 421 mp->mnt_data = isomp; 422 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 423 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 424 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 425 mp->mnt_stat.f_namemax = MAXNAMLEN; 426 mp->mnt_flag |= MNT_LOCAL; 427 mp->mnt_dev_bshift = iso_bsize; 428 mp->mnt_fs_bshift = isomp->im_bshift; 429 isomp->im_mountp = mp; 430 isomp->im_dev = dev; 431 isomp->im_devvp = devvp; 432 433 devvp->v_specmountpoint = mp; 434 435 /* Check the Rock Ridge Extension support */ 436 if (!(argp->flags & ISOFSMNT_NORRIP)) { 437 struct iso_directory_record *rootp; 438 439 if ((error = bread(isomp->im_devvp, 440 (isomp->root_extent + ext_attr_length) << 441 (isomp->im_bshift - DEV_BSHIFT), 442 isomp->logical_block_size, NOCRED, 443 &bp)) != 0) 444 goto out; 445 446 rootp = (struct iso_directory_record *)bp->b_data; 447 448 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 449 argp->flags |= ISOFSMNT_NORRIP; 450 } else { 451 argp->flags &= ~ISOFSMNT_GENS; 452 } 453 454 /* 455 * The contents are valid, 456 * but they will get reread as part of another vnode, so... 457 */ 458 bp->b_flags |= B_AGE; 459 brelse(bp); 460 bp = NULL; 461 } 462 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 463 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 464 465 if (isomp->im_flags & ISOFSMNT_GENS) 466 isomp->iso_ftype = ISO_FTYPE_9660; 467 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 468 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 469 if (argp->flags & ISOFSMNT_NOCASETRANS) 470 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 471 } else 472 isomp->iso_ftype = ISO_FTYPE_RRIP; 473 474 /* Check the Joliet Extension support */ 475 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 476 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 477 supbp != NULL) { 478 joliet_level = 0; 479 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 480 481 if ((isonum_711(sup->flags) & 1) == 0) { 482 if (memcmp(sup->escape, "%/@", 3) == 0) 483 joliet_level = 1; 484 if (memcmp(sup->escape, "%/C", 3) == 0) 485 joliet_level = 2; 486 if (memcmp(sup->escape, "%/E", 3) == 0) 487 joliet_level = 3; 488 } 489 if (joliet_level != 0) { 490 if (iso_makemp(isomp, supbp, NULL) == -1) { 491 error = EINVAL; 492 goto out; 493 } 494 isomp->im_joliet_level = joliet_level; 495 } 496 } 497 498 if (supbp != NULL) { 499 brelse(supbp); 500 supbp = NULL; 501 } 502 503 return 0; 504 out: 505 if (bp) 506 brelse(bp); 507 if (pribp) 508 brelse(pribp); 509 if (supbp) 510 brelse(supbp); 511 if (isomp) { 512 free(isomp, M_ISOFSMNT); 513 mp->mnt_data = NULL; 514 } 515 return error; 516 } 517 518 /* 519 * Make a filesystem operational. 520 * Nothing to do at the moment. 521 */ 522 /* ARGSUSED */ 523 int 524 cd9660_start(mp, flags, p) 525 struct mount *mp; 526 int flags; 527 struct proc *p; 528 { 529 return 0; 530 } 531 532 /* 533 * unmount system call 534 */ 535 int 536 cd9660_unmount(mp, mntflags, p) 537 struct mount *mp; 538 int mntflags; 539 struct proc *p; 540 { 541 struct iso_mnt *isomp; 542 int error, flags = 0; 543 544 if (mntflags & MNT_FORCE) 545 flags |= FORCECLOSE; 546 #if 0 547 mntflushbuf(mp, 0); 548 if (mntinvalbuf(mp)) 549 return EBUSY; 550 #endif 551 if ((error = vflush(mp, NULLVP, flags)) != 0) 552 return (error); 553 554 isomp = VFSTOISOFS(mp); 555 556 #ifdef ISODEVMAP 557 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 558 iso_dunmap(isomp->im_dev); 559 #endif 560 561 if (isomp->im_devvp->v_type != VBAD) 562 isomp->im_devvp->v_specmountpoint = NULL; 563 564 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 565 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 566 vput(isomp->im_devvp); 567 free(isomp, M_ISOFSMNT); 568 mp->mnt_data = NULL; 569 mp->mnt_flag &= ~MNT_LOCAL; 570 return (error); 571 } 572 573 /* 574 * Return root of a filesystem 575 */ 576 int 577 cd9660_root(mp, vpp) 578 struct mount *mp; 579 struct vnode **vpp; 580 { 581 struct iso_mnt *imp = VFSTOISOFS(mp); 582 struct iso_directory_record *dp = 583 (struct iso_directory_record *)imp->root; 584 ino_t ino = isodirino(dp, imp); 585 586 /* 587 * With RRIP we must use the `.' entry of the root directory. 588 * Simply tell vget, that it's a relocated directory. 589 */ 590 return (cd9660_vget_internal(mp, ino, vpp, 591 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 592 } 593 594 /* 595 * Do operations associated with quotas, not supported 596 */ 597 /* ARGSUSED */ 598 int 599 cd9660_quotactl(mp, cmd, uid, arg, p) 600 struct mount *mp; 601 int cmd; 602 uid_t uid; 603 void *arg; 604 struct proc *p; 605 { 606 607 return (EOPNOTSUPP); 608 } 609 610 /* 611 * Get file system statistics. 612 */ 613 int 614 cd9660_statvfs(mp, sbp, p) 615 struct mount *mp; 616 struct statvfs *sbp; 617 struct proc *p; 618 { 619 struct iso_mnt *isomp; 620 621 isomp = VFSTOISOFS(mp); 622 623 sbp->f_bsize = isomp->logical_block_size; 624 sbp->f_frsize = sbp->f_bsize; 625 sbp->f_iosize = sbp->f_bsize; /* XXX */ 626 sbp->f_blocks = isomp->volume_space_size; 627 sbp->f_bfree = 0; /* total free blocks */ 628 sbp->f_bavail = 0; /* blocks free for non superuser */ 629 sbp->f_bresvd = 0; /* total reserved blocks */ 630 sbp->f_files = 0; /* total files */ 631 sbp->f_ffree = 0; /* free file nodes */ 632 sbp->f_favail = 0; /* free file nodes */ 633 sbp->f_fresvd = 0; /* reserved file nodes */ 634 copy_statvfs_info(sbp, mp); 635 /* Use the first spare for flags: */ 636 sbp->f_spare[0] = isomp->im_flags; 637 return 0; 638 } 639 640 /* ARGSUSED */ 641 int 642 cd9660_sync(mp, waitfor, cred, p) 643 struct mount *mp; 644 int waitfor; 645 struct ucred *cred; 646 struct proc *p; 647 { 648 return (0); 649 } 650 651 /* 652 * File handle to vnode 653 * 654 * Have to be really careful about stale file handles: 655 * - check that the inode number is in range 656 * - call iget() to get the locked inode 657 * - check for an unallocated inode (i_mode == 0) 658 * - check that the generation number matches 659 */ 660 661 struct ifid { 662 ushort ifid_len; 663 ushort ifid_pad; 664 int ifid_ino; 665 long ifid_start; 666 }; 667 668 /* ARGSUSED */ 669 int 670 cd9660_fhtovp(mp, fhp, vpp) 671 struct mount *mp; 672 struct fid *fhp; 673 struct vnode **vpp; 674 { 675 struct ifid *ifhp = (struct ifid *)fhp; 676 struct iso_node *ip; 677 struct vnode *nvp; 678 int error; 679 680 #ifdef ISOFS_DBG 681 printf("fhtovp: ino %d, start %ld\n", 682 ifhp->ifid_ino, ifhp->ifid_start); 683 #endif 684 685 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 686 *vpp = NULLVP; 687 return (error); 688 } 689 ip = VTOI(nvp); 690 if (ip->inode.iso_mode == 0) { 691 vput(nvp); 692 *vpp = NULLVP; 693 return (ESTALE); 694 } 695 *vpp = nvp; 696 return (0); 697 } 698 699 /* ARGSUSED */ 700 int 701 cd9660_check_export(mp, nam, exflagsp, credanonp) 702 struct mount *mp; 703 struct mbuf *nam; 704 int *exflagsp; 705 struct ucred **credanonp; 706 { 707 struct netcred *np; 708 struct iso_mnt *imp = VFSTOISOFS(mp); 709 710 #ifdef ISOFS_DBG 711 printf("check_export: ino %d, start %ld\n", 712 ifhp->ifid_ino, ifhp->ifid_start); 713 #endif 714 715 /* 716 * Get the export permission structure for this <mp, client> tuple. 717 */ 718 np = vfs_export_lookup(mp, &imp->im_export, nam); 719 if (np == NULL) 720 return (EACCES); 721 722 *exflagsp = np->netc_exflags; 723 *credanonp = &np->netc_anon; 724 return (0); 725 } 726 727 int 728 cd9660_vget(mp, ino, vpp) 729 struct mount *mp; 730 ino_t ino; 731 struct vnode **vpp; 732 { 733 734 /* 735 * XXXX 736 * It would be nice if we didn't always set the `relocated' flag 737 * and force the extra read, but I don't want to think about fixing 738 * that right now. 739 */ 740 return (cd9660_vget_internal(mp, ino, vpp, 741 #if 0 742 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 743 #else 744 0, 745 #endif 746 NULL)); 747 } 748 749 int 750 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 751 struct mount *mp; 752 ino_t ino; 753 struct vnode **vpp; 754 int relocated; 755 struct iso_directory_record *isodir; 756 { 757 struct iso_mnt *imp; 758 struct iso_node *ip; 759 #ifdef ISODEVMAP 760 struct iso_dnode *dp; 761 #endif 762 struct buf *bp; 763 struct vnode *vp, *nvp; 764 dev_t dev; 765 int error; 766 767 imp = VFSTOISOFS(mp); 768 dev = imp->im_dev; 769 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 770 return (0); 771 772 /* Allocate a new vnode/iso_node. */ 773 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 774 *vpp = NULLVP; 775 return (error); 776 } 777 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 778 memset(ip, 0, sizeof(struct iso_node)); 779 vp->v_data = ip; 780 ip->i_vnode = vp; 781 ip->i_dev = dev; 782 ip->i_number = ino; 783 784 /* 785 * Put it onto its hash chain and lock it so that other requests for 786 * this inode will block if they arrive while we are sleeping waiting 787 * for old data structures to be purged or for the contents of the 788 * disk portion of this inode to be read. 789 */ 790 cd9660_ihashins(ip); 791 792 if (isodir == 0) { 793 int lbn, off; 794 795 lbn = lblkno(imp, ino); 796 if (lbn >= imp->volume_space_size) { 797 vput(vp); 798 printf("fhtovp: lbn exceed volume space %d\n", lbn); 799 return (ESTALE); 800 } 801 802 off = blkoff(imp, ino); 803 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 804 vput(vp); 805 printf("fhtovp: crosses block boundary %d\n", 806 off + ISO_DIRECTORY_RECORD_SIZE); 807 return (ESTALE); 808 } 809 810 error = bread(imp->im_devvp, 811 lbn << (imp->im_bshift - DEV_BSHIFT), 812 imp->logical_block_size, NOCRED, &bp); 813 if (error) { 814 vput(vp); 815 brelse(bp); 816 printf("fhtovp: bread error %d\n",error); 817 return (error); 818 } 819 isodir = (struct iso_directory_record *)(bp->b_data + off); 820 821 if (off + isonum_711(isodir->length) > 822 imp->logical_block_size) { 823 vput(vp); 824 if (bp != 0) 825 brelse(bp); 826 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 827 off +isonum_711(isodir->length), off, 828 isonum_711(isodir->length)); 829 return (ESTALE); 830 } 831 832 #if 0 833 if (isonum_733(isodir->extent) + 834 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 835 if (bp != 0) 836 brelse(bp); 837 printf("fhtovp: file start miss %d vs %d\n", 838 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 839 ifhp->ifid_start); 840 return (ESTALE); 841 } 842 #endif 843 } else 844 bp = 0; 845 846 ip->i_mnt = imp; 847 ip->i_devvp = imp->im_devvp; 848 VREF(ip->i_devvp); 849 850 if (relocated) { 851 /* 852 * On relocated directories we must 853 * read the `.' entry out of a dir. 854 */ 855 ip->iso_start = ino >> imp->im_bshift; 856 if (bp != 0) 857 brelse(bp); 858 if ((error = VOP_BLKATOFF(vp, (off_t)0, NULL, &bp)) != 0) { 859 vput(vp); 860 return (error); 861 } 862 isodir = (struct iso_directory_record *)bp->b_data; 863 } 864 865 ip->iso_extent = isonum_733(isodir->extent); 866 ip->i_size = isonum_733(isodir->size); 867 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 868 869 /* 870 * Setup time stamp, attribute 871 */ 872 vp->v_type = VNON; 873 switch (imp->iso_ftype) { 874 default: /* ISO_FTYPE_9660 */ 875 { 876 struct buf *bp2; 877 int off; 878 if ((imp->im_flags & ISOFSMNT_EXTATT) 879 && (off = isonum_711(isodir->ext_attr_length))) 880 VOP_BLKATOFF(vp, (off_t)-(off << imp->im_bshift), NULL, 881 &bp2); 882 else 883 bp2 = NULL; 884 cd9660_defattr(isodir, ip, bp2); 885 cd9660_deftstamp(isodir, ip, bp2); 886 if (bp2) 887 brelse(bp2); 888 break; 889 } 890 case ISO_FTYPE_RRIP: 891 cd9660_rrip_analyze(isodir, ip, imp); 892 break; 893 } 894 895 if (bp != 0) 896 brelse(bp); 897 898 /* 899 * Initialize the associated vnode 900 */ 901 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 902 case VFIFO: 903 vp->v_op = cd9660_fifoop_p; 904 break; 905 case VCHR: 906 case VBLK: 907 /* 908 * if device, look at device number table for translation 909 */ 910 #ifdef ISODEVMAP 911 if ((dp = iso_dmap(dev, ino, 0)) != NULL) 912 ip->inode.iso_rdev = dp->d_dev; 913 #endif 914 vp->v_op = cd9660_specop_p; 915 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 916 /* 917 * Discard unneeded vnode, but save its iso_node. 918 * Note that the lock is carried over in the iso_node 919 * to the replacement vnode. 920 */ 921 nvp->v_data = vp->v_data; 922 vp->v_data = NULL; 923 VOP_UNLOCK(vp, 0); 924 vp->v_op = spec_vnodeop_p; 925 vrele(vp); 926 vgone(vp); 927 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 928 /* 929 * Reinitialize aliased inode. 930 */ 931 vp = nvp; 932 ip->i_vnode = vp; 933 } 934 break; 935 case VLNK: 936 case VNON: 937 case VSOCK: 938 case VDIR: 939 case VBAD: 940 break; 941 case VREG: 942 uvm_vnp_setsize(vp, ip->i_size); 943 break; 944 } 945 946 if (ip->iso_extent == imp->root_extent) 947 vp->v_flag |= VROOT; 948 949 /* 950 * XXX need generation number? 951 */ 952 953 genfs_node_init(vp, &cd9660_genfsops); 954 *vpp = vp; 955 return (0); 956 } 957 958 /* 959 * Vnode pointer to File handle 960 */ 961 /* ARGSUSED */ 962 int 963 cd9660_vptofh(vp, fhp) 964 struct vnode *vp; 965 struct fid *fhp; 966 { 967 struct iso_node *ip = VTOI(vp); 968 struct ifid *ifhp; 969 970 ifhp = (struct ifid *)fhp; 971 ifhp->ifid_len = sizeof(struct ifid); 972 973 ifhp->ifid_ino = ip->i_number; 974 ifhp->ifid_start = ip->iso_start; 975 976 #ifdef ISOFS_DBG 977 printf("vptofh: ino %d, start %ld\n", 978 ifhp->ifid_ino,ifhp->ifid_start); 979 #endif 980 return 0; 981 } 982 983 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 984 { 985 986 sysctl_createv(clog, 0, NULL, NULL, 987 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 988 NULL, 0, NULL, 0, 989 CTL_VFS, CTL_EOL); 990 sysctl_createv(clog, 0, NULL, NULL, 991 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 992 SYSCTL_DESCR("ISO-9660 file system"), 993 NULL, 0, NULL, 0, 994 CTL_VFS, 14, CTL_EOL); 995 996 sysctl_createv(clog, 0, NULL, NULL, 997 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 998 CTLTYPE_INT, "utf8_joliet", 999 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 1000 NULL, 0, &cd9660_utf8_joliet, 0, 1001 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 1002 1003 } 1004
Indexes created Fri Sep 26 08:10:20 GMT 2025