cd9660_vfsops.c revision 1.20
1 /* $NetBSD: cd9660_vfsops.c,v 1.20 2005/01/02 16:08:28 thorpej 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 1.20 2005/01/02 16:08:28 thorpej 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 /* 137 * Get vnodes for swapdev and rootdev. 138 */ 139 if (bdevvp(rootdev, &rootvp)) 140 panic("cd9660_mountroot: can't setup rootvp"); 141 142 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 143 != 0) { 144 vrele(rootvp); 145 return (error); 146 } 147 148 args.flags = ISOFSMNT_ROOT; 149 if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) { 150 mp->mnt_op->vfs_refcount--; 151 vfs_unbusy(mp); 152 free(mp, M_MOUNT); 153 vrele(rootvp); 154 return (error); 155 } 156 simple_lock(&mountlist_slock); 157 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 158 simple_unlock(&mountlist_slock); 159 (void)cd9660_statvfs(mp, &mp->mnt_stat, p); 160 vfs_unbusy(mp); 161 return (0); 162 } 163 164 /* 165 * VFS Operations. 166 * 167 * mount system call 168 */ 169 int 170 cd9660_mount(mp, path, data, ndp, p) 171 struct mount *mp; 172 const char *path; 173 void *data; 174 struct nameidata *ndp; 175 struct proc *p; 176 { 177 struct vnode *devvp; 178 struct iso_args args; 179 int error; 180 struct iso_mnt *imp = NULL; 181 182 if (mp->mnt_flag & MNT_GETARGS) { 183 imp = VFSTOISOFS(mp); 184 if (imp == NULL) 185 return EIO; 186 args.fspec = NULL; 187 args.flags = imp->im_flags; 188 vfs_showexport(mp, &args.export, &imp->im_export); 189 return copyout(&args, data, sizeof(args)); 190 } 191 error = copyin(data, &args, sizeof (struct iso_args)); 192 if (error) 193 return (error); 194 195 if ((mp->mnt_flag & MNT_RDONLY) == 0) 196 return (EROFS); 197 198 /* 199 * If updating, check whether changing from read-only to 200 * read/write; if there is no device name, that's all we do. 201 */ 202 if (mp->mnt_flag & MNT_UPDATE) { 203 imp = VFSTOISOFS(mp); 204 if (args.fspec == 0) 205 return (vfs_export(mp, &imp->im_export, &args.export)); 206 } 207 /* 208 * Not an update, or updating the name: look up the name 209 * and verify that it refers to a sensible block device. 210 */ 211 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 212 if ((error = namei(ndp)) != 0) 213 return (error); 214 devvp = ndp->ni_vp; 215 216 if (devvp->v_type != VBLK) { 217 vrele(devvp); 218 return ENOTBLK; 219 } 220 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 221 vrele(devvp); 222 return ENXIO; 223 } 224 /* 225 * If mount by non-root, then verify that user has necessary 226 * permissions on the device. 227 */ 228 if (p->p_ucred->cr_uid != 0) { 229 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 230 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 231 VOP_UNLOCK(devvp, 0); 232 if (error) { 233 vrele(devvp); 234 return (error); 235 } 236 } 237 if ((mp->mnt_flag & MNT_UPDATE) == 0) 238 error = iso_mountfs(devvp, mp, p, &args); 239 else { 240 if (devvp != imp->im_devvp) 241 error = EINVAL; /* needs translation */ 242 else 243 vrele(devvp); 244 } 245 if (error) { 246 vrele(devvp); 247 return error; 248 } 249 imp = VFSTOISOFS(mp); 250 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 251 mp, p); 252 } 253 254 /* 255 * Make a mount point from a volume descriptor 256 */ 257 static int 258 iso_makemp(isomp, bp, ea_len) 259 struct iso_mnt *isomp; 260 struct buf *bp; 261 int *ea_len; 262 { 263 struct iso_primary_descriptor *pri; 264 int logical_block_size; 265 struct iso_directory_record *rootp; 266 267 pri = (struct iso_primary_descriptor *)bp->b_data; 268 269 logical_block_size = isonum_723 (pri->logical_block_size); 270 271 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 272 || (logical_block_size & (logical_block_size - 1)) != 0) 273 return -1; 274 275 rootp = (struct iso_directory_record *)pri->root_directory_record; 276 277 isomp->logical_block_size = logical_block_size; 278 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 279 memcpy(isomp->root, rootp, sizeof(isomp->root)); 280 isomp->root_extent = isonum_733 (rootp->extent); 281 isomp->root_size = isonum_733 (rootp->size); 282 isomp->im_joliet_level = 0; 283 284 isomp->im_bmask = logical_block_size - 1; 285 isomp->im_bshift = 0; 286 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 287 isomp->im_bshift++; 288 289 if (ea_len != NULL) 290 *ea_len = isonum_711(rootp->ext_attr_length); 291 292 return 0; 293 } 294 295 /* 296 * Common code for mount and mountroot 297 */ 298 static int 299 iso_mountfs(devvp, mp, p, argp) 300 struct vnode *devvp; 301 struct mount *mp; 302 struct proc *p; 303 struct iso_args *argp; 304 { 305 struct iso_mnt *isomp = (struct iso_mnt *)0; 306 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 307 dev_t dev = devvp->v_rdev; 308 int error = EINVAL; 309 int needclose = 0; 310 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 311 int iso_bsize; 312 int iso_blknum; 313 int joliet_level; 314 struct iso_volume_descriptor *vdp; 315 struct iso_supplementary_descriptor *sup; 316 int sess = 0; 317 int ext_attr_length; 318 struct disklabel label; 319 320 if (!ronly) 321 return EROFS; 322 323 /* 324 * Disallow multiple mounts of the same device. 325 * Disallow mounting of a device that is currently in use 326 * (except for root, which might share swap device for miniroot). 327 * Flush out any old buffers remaining from a previous use. 328 */ 329 if ((error = vfs_mountedon(devvp)) != 0) 330 return error; 331 if (vcount(devvp) > 1 && devvp != rootvp) 332 return EBUSY; 333 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 334 return (error); 335 336 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 337 if (error) 338 return error; 339 needclose = 1; 340 341 /* This is the "logical sector size". The standard says this 342 * should be 2048 or the physical sector size on the device, 343 * whichever is greater. For now, we'll just use a constant. 344 */ 345 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 346 347 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, p); 348 if (!error && 349 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 350 /* XXX more sanity checks? */ 351 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 352 } else { 353 /* fallback to old method */ 354 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, p); 355 if (error) 356 sess = 0; /* never mind */ 357 } 358 #ifdef ISO_DEBUG 359 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 360 #endif 361 362 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 363 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 364 iso_bsize, NOCRED, &bp)) != 0) 365 goto out; 366 367 vdp = (struct iso_volume_descriptor *)bp->b_data; 368 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 369 error = EINVAL; 370 goto out; 371 } 372 373 switch (isonum_711(vdp->type)) { 374 case ISO_VD_PRIMARY: 375 if (pribp == NULL) { 376 pribp = bp; 377 bp = NULL; 378 } 379 break; 380 381 case ISO_VD_SUPPLEMENTARY: 382 if (supbp == NULL) { 383 supbp = bp; 384 bp = NULL; 385 } 386 break; 387 388 default: 389 break; 390 } 391 392 if (isonum_711 (vdp->type) == ISO_VD_END) { 393 brelse(bp); 394 bp = NULL; 395 break; 396 } 397 398 if (bp != NULL) { 399 brelse(bp); 400 bp = NULL; 401 } 402 } 403 404 if (pribp == NULL) { 405 error = EINVAL; 406 goto out; 407 } 408 409 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 410 memset(isomp, 0, sizeof *isomp); 411 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 412 error = EINVAL; 413 goto out; 414 } 415 416 isomp->volume_space_size += sess; 417 418 pribp->b_flags |= B_AGE; 419 brelse(pribp); 420 pribp = NULL; 421 422 mp->mnt_data = isomp; 423 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 424 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 425 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 426 mp->mnt_stat.f_namemax = MAXNAMLEN; 427 mp->mnt_flag |= MNT_LOCAL; 428 mp->mnt_dev_bshift = iso_bsize; 429 mp->mnt_fs_bshift = isomp->im_bshift; 430 isomp->im_mountp = mp; 431 isomp->im_dev = dev; 432 isomp->im_devvp = devvp; 433 434 devvp->v_specmountpoint = mp; 435 436 /* Check the Rock Ridge Extension support */ 437 if (!(argp->flags & ISOFSMNT_NORRIP)) { 438 struct iso_directory_record *rootp; 439 440 if ((error = bread(isomp->im_devvp, 441 (isomp->root_extent + ext_attr_length) << 442 (isomp->im_bshift - DEV_BSHIFT), 443 isomp->logical_block_size, NOCRED, 444 &bp)) != 0) 445 goto out; 446 447 rootp = (struct iso_directory_record *)bp->b_data; 448 449 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 450 argp->flags |= ISOFSMNT_NORRIP; 451 } else { 452 argp->flags &= ~ISOFSMNT_GENS; 453 } 454 455 /* 456 * The contents are valid, 457 * but they will get reread as part of another vnode, so... 458 */ 459 bp->b_flags |= B_AGE; 460 brelse(bp); 461 bp = NULL; 462 } 463 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 464 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 465 466 if (isomp->im_flags & ISOFSMNT_GENS) 467 isomp->iso_ftype = ISO_FTYPE_9660; 468 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 469 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 470 if (argp->flags & ISOFSMNT_NOCASETRANS) 471 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 472 } else 473 isomp->iso_ftype = ISO_FTYPE_RRIP; 474 475 /* Check the Joliet Extension support */ 476 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 477 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 478 supbp != NULL) { 479 joliet_level = 0; 480 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 481 482 if ((isonum_711(sup->flags) & 1) == 0) { 483 if (memcmp(sup->escape, "%/@", 3) == 0) 484 joliet_level = 1; 485 if (memcmp(sup->escape, "%/C", 3) == 0) 486 joliet_level = 2; 487 if (memcmp(sup->escape, "%/E", 3) == 0) 488 joliet_level = 3; 489 } 490 if (joliet_level != 0) { 491 if (iso_makemp(isomp, supbp, NULL) == -1) { 492 error = EINVAL; 493 goto out; 494 } 495 isomp->im_joliet_level = joliet_level; 496 } 497 } 498 499 if (supbp != NULL) { 500 brelse(supbp); 501 supbp = NULL; 502 } 503 504 return 0; 505 out: 506 if (bp) 507 brelse(bp); 508 if (pribp) 509 brelse(pribp); 510 if (supbp) 511 brelse(supbp); 512 if (needclose) { 513 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 514 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 515 VOP_UNLOCK(devvp, 0); 516 } 517 if (isomp) { 518 free(isomp, M_ISOFSMNT); 519 mp->mnt_data = NULL; 520 } 521 return error; 522 } 523 524 /* 525 * Make a filesystem operational. 526 * Nothing to do at the moment. 527 */ 528 /* ARGSUSED */ 529 int 530 cd9660_start(mp, flags, p) 531 struct mount *mp; 532 int flags; 533 struct proc *p; 534 { 535 return 0; 536 } 537 538 /* 539 * unmount system call 540 */ 541 int 542 cd9660_unmount(mp, mntflags, p) 543 struct mount *mp; 544 int mntflags; 545 struct proc *p; 546 { 547 struct iso_mnt *isomp; 548 int error, flags = 0; 549 550 if (mntflags & MNT_FORCE) 551 flags |= FORCECLOSE; 552 #if 0 553 mntflushbuf(mp, 0); 554 if (mntinvalbuf(mp)) 555 return EBUSY; 556 #endif 557 if ((error = vflush(mp, NULLVP, flags)) != 0) 558 return (error); 559 560 isomp = VFSTOISOFS(mp); 561 562 #ifdef ISODEVMAP 563 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 564 iso_dunmap(isomp->im_dev); 565 #endif 566 567 if (isomp->im_devvp->v_type != VBAD) 568 isomp->im_devvp->v_specmountpoint = NULL; 569 570 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 571 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 572 vput(isomp->im_devvp); 573 free(isomp, M_ISOFSMNT); 574 mp->mnt_data = NULL; 575 mp->mnt_flag &= ~MNT_LOCAL; 576 return (error); 577 } 578 579 /* 580 * Return root of a filesystem 581 */ 582 int 583 cd9660_root(mp, vpp) 584 struct mount *mp; 585 struct vnode **vpp; 586 { 587 struct iso_mnt *imp = VFSTOISOFS(mp); 588 struct iso_directory_record *dp = 589 (struct iso_directory_record *)imp->root; 590 ino_t ino = isodirino(dp, imp); 591 592 /* 593 * With RRIP we must use the `.' entry of the root directory. 594 * Simply tell vget, that it's a relocated directory. 595 */ 596 return (cd9660_vget_internal(mp, ino, vpp, 597 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 598 } 599 600 /* 601 * Do operations associated with quotas, not supported 602 */ 603 /* ARGSUSED */ 604 int 605 cd9660_quotactl(mp, cmd, uid, arg, p) 606 struct mount *mp; 607 int cmd; 608 uid_t uid; 609 void *arg; 610 struct proc *p; 611 { 612 613 return (EOPNOTSUPP); 614 } 615 616 /* 617 * Get file system statistics. 618 */ 619 int 620 cd9660_statvfs(mp, sbp, p) 621 struct mount *mp; 622 struct statvfs *sbp; 623 struct proc *p; 624 { 625 struct iso_mnt *isomp; 626 627 isomp = VFSTOISOFS(mp); 628 629 sbp->f_bsize = isomp->logical_block_size; 630 sbp->f_frsize = sbp->f_bsize; 631 sbp->f_iosize = sbp->f_bsize; /* XXX */ 632 sbp->f_blocks = isomp->volume_space_size; 633 sbp->f_bfree = 0; /* total free blocks */ 634 sbp->f_bavail = 0; /* blocks free for non superuser */ 635 sbp->f_bresvd = 0; /* total reserved blocks */ 636 sbp->f_files = 0; /* total files */ 637 sbp->f_ffree = 0; /* free file nodes */ 638 sbp->f_favail = 0; /* free file nodes */ 639 sbp->f_fresvd = 0; /* reserved file nodes */ 640 copy_statvfs_info(sbp, mp); 641 /* Use the first spare for flags: */ 642 sbp->f_spare[0] = isomp->im_flags; 643 return 0; 644 } 645 646 /* ARGSUSED */ 647 int 648 cd9660_sync(mp, waitfor, cred, p) 649 struct mount *mp; 650 int waitfor; 651 struct ucred *cred; 652 struct proc *p; 653 { 654 return (0); 655 } 656 657 /* 658 * File handle to vnode 659 * 660 * Have to be really careful about stale file handles: 661 * - check that the inode number is in range 662 * - call iget() to get the locked inode 663 * - check for an unallocated inode (i_mode == 0) 664 * - check that the generation number matches 665 */ 666 667 struct ifid { 668 ushort ifid_len; 669 ushort ifid_pad; 670 int ifid_ino; 671 long ifid_start; 672 }; 673 674 /* ARGSUSED */ 675 int 676 cd9660_fhtovp(mp, fhp, vpp) 677 struct mount *mp; 678 struct fid *fhp; 679 struct vnode **vpp; 680 { 681 struct ifid *ifhp = (struct ifid *)fhp; 682 struct iso_node *ip; 683 struct vnode *nvp; 684 int error; 685 686 #ifdef ISOFS_DBG 687 printf("fhtovp: ino %d, start %ld\n", 688 ifhp->ifid_ino, ifhp->ifid_start); 689 #endif 690 691 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 692 *vpp = NULLVP; 693 return (error); 694 } 695 ip = VTOI(nvp); 696 if (ip->inode.iso_mode == 0) { 697 vput(nvp); 698 *vpp = NULLVP; 699 return (ESTALE); 700 } 701 *vpp = nvp; 702 return (0); 703 } 704 705 /* ARGSUSED */ 706 int 707 cd9660_check_export(mp, nam, exflagsp, credanonp) 708 struct mount *mp; 709 struct mbuf *nam; 710 int *exflagsp; 711 struct ucred **credanonp; 712 { 713 struct netcred *np; 714 struct iso_mnt *imp = VFSTOISOFS(mp); 715 716 #ifdef ISOFS_DBG 717 printf("check_export: ino %d, start %ld\n", 718 ifhp->ifid_ino, ifhp->ifid_start); 719 #endif 720 721 /* 722 * Get the export permission structure for this <mp, client> tuple. 723 */ 724 np = vfs_export_lookup(mp, &imp->im_export, nam); 725 if (np == NULL) 726 return (EACCES); 727 728 *exflagsp = np->netc_exflags; 729 *credanonp = &np->netc_anon; 730 return (0); 731 } 732 733 int 734 cd9660_vget(mp, ino, vpp) 735 struct mount *mp; 736 ino_t ino; 737 struct vnode **vpp; 738 { 739 740 /* 741 * XXXX 742 * It would be nice if we didn't always set the `relocated' flag 743 * and force the extra read, but I don't want to think about fixing 744 * that right now. 745 */ 746 return (cd9660_vget_internal(mp, ino, vpp, 747 #if 0 748 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 749 #else 750 0, 751 #endif 752 NULL)); 753 } 754 755 int 756 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 757 struct mount *mp; 758 ino_t ino; 759 struct vnode **vpp; 760 int relocated; 761 struct iso_directory_record *isodir; 762 { 763 struct iso_mnt *imp; 764 struct iso_node *ip; 765 #ifdef ISODEVMAP 766 struct iso_dnode *dp; 767 #endif 768 struct buf *bp; 769 struct vnode *vp, *nvp; 770 dev_t dev; 771 int error; 772 773 imp = VFSTOISOFS(mp); 774 dev = imp->im_dev; 775 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 776 return (0); 777 778 /* Allocate a new vnode/iso_node. */ 779 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 780 *vpp = NULLVP; 781 return (error); 782 } 783 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 784 memset(ip, 0, sizeof(struct iso_node)); 785 vp->v_data = ip; 786 ip->i_vnode = vp; 787 ip->i_dev = dev; 788 ip->i_number = ino; 789 790 /* 791 * Put it onto its hash chain and lock it so that other requests for 792 * this inode will block if they arrive while we are sleeping waiting 793 * for old data structures to be purged or for the contents of the 794 * disk portion of this inode to be read. 795 */ 796 cd9660_ihashins(ip); 797 798 if (isodir == 0) { 799 int lbn, off; 800 801 lbn = lblkno(imp, ino); 802 if (lbn >= imp->volume_space_size) { 803 vput(vp); 804 printf("fhtovp: lbn exceed volume space %d\n", lbn); 805 return (ESTALE); 806 } 807 808 off = blkoff(imp, ino); 809 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 810 vput(vp); 811 printf("fhtovp: crosses block boundary %d\n", 812 off + ISO_DIRECTORY_RECORD_SIZE); 813 return (ESTALE); 814 } 815 816 error = bread(imp->im_devvp, 817 lbn << (imp->im_bshift - DEV_BSHIFT), 818 imp->logical_block_size, NOCRED, &bp); 819 if (error) { 820 vput(vp); 821 brelse(bp); 822 printf("fhtovp: bread error %d\n",error); 823 return (error); 824 } 825 isodir = (struct iso_directory_record *)(bp->b_data + off); 826 827 if (off + isonum_711(isodir->length) > 828 imp->logical_block_size) { 829 vput(vp); 830 if (bp != 0) 831 brelse(bp); 832 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 833 off +isonum_711(isodir->length), off, 834 isonum_711(isodir->length)); 835 return (ESTALE); 836 } 837 838 #if 0 839 if (isonum_733(isodir->extent) + 840 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 841 if (bp != 0) 842 brelse(bp); 843 printf("fhtovp: file start miss %d vs %d\n", 844 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 845 ifhp->ifid_start); 846 return (ESTALE); 847 } 848 #endif 849 } else 850 bp = 0; 851 852 ip->i_mnt = imp; 853 ip->i_devvp = imp->im_devvp; 854 VREF(ip->i_devvp); 855 856 if (relocated) { 857 /* 858 * On relocated directories we must 859 * read the `.' entry out of a dir. 860 */ 861 ip->iso_start = ino >> imp->im_bshift; 862 if (bp != 0) 863 brelse(bp); 864 if ((error = VOP_BLKATOFF(vp, (off_t)0, NULL, &bp)) != 0) { 865 vput(vp); 866 return (error); 867 } 868 isodir = (struct iso_directory_record *)bp->b_data; 869 } 870 871 ip->iso_extent = isonum_733(isodir->extent); 872 ip->i_size = isonum_733(isodir->size); 873 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 874 875 /* 876 * Setup time stamp, attribute 877 */ 878 vp->v_type = VNON; 879 switch (imp->iso_ftype) { 880 default: /* ISO_FTYPE_9660 */ 881 { 882 struct buf *bp2; 883 int off; 884 if ((imp->im_flags & ISOFSMNT_EXTATT) 885 && (off = isonum_711(isodir->ext_attr_length))) 886 VOP_BLKATOFF(vp, (off_t)-(off << imp->im_bshift), NULL, 887 &bp2); 888 else 889 bp2 = NULL; 890 cd9660_defattr(isodir, ip, bp2); 891 cd9660_deftstamp(isodir, ip, bp2); 892 if (bp2) 893 brelse(bp2); 894 break; 895 } 896 case ISO_FTYPE_RRIP: 897 cd9660_rrip_analyze(isodir, ip, imp); 898 break; 899 } 900 901 if (bp != 0) 902 brelse(bp); 903 904 /* 905 * Initialize the associated vnode 906 */ 907 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 908 case VFIFO: 909 vp->v_op = cd9660_fifoop_p; 910 break; 911 case VCHR: 912 case VBLK: 913 /* 914 * if device, look at device number table for translation 915 */ 916 #ifdef ISODEVMAP 917 if ((dp = iso_dmap(dev, ino, 0)) != NULL) 918 ip->inode.iso_rdev = dp->d_dev; 919 #endif 920 vp->v_op = cd9660_specop_p; 921 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 922 /* 923 * Discard unneeded vnode, but save its iso_node. 924 * Note that the lock is carried over in the iso_node 925 * to the replacement vnode. 926 */ 927 nvp->v_data = vp->v_data; 928 vp->v_data = NULL; 929 VOP_UNLOCK(vp, 0); 930 vp->v_op = spec_vnodeop_p; 931 vrele(vp); 932 vgone(vp); 933 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 934 /* 935 * Reinitialize aliased inode. 936 */ 937 vp = nvp; 938 ip->i_vnode = vp; 939 } 940 break; 941 case VLNK: 942 case VNON: 943 case VSOCK: 944 case VDIR: 945 case VBAD: 946 break; 947 case VREG: 948 uvm_vnp_setsize(vp, ip->i_size); 949 break; 950 } 951 952 if (ip->iso_extent == imp->root_extent) 953 vp->v_flag |= VROOT; 954 955 /* 956 * XXX need generation number? 957 */ 958 959 genfs_node_init(vp, &cd9660_genfsops); 960 *vpp = vp; 961 return (0); 962 } 963 964 /* 965 * Vnode pointer to File handle 966 */ 967 /* ARGSUSED */ 968 int 969 cd9660_vptofh(vp, fhp) 970 struct vnode *vp; 971 struct fid *fhp; 972 { 973 struct iso_node *ip = VTOI(vp); 974 struct ifid *ifhp; 975 976 ifhp = (struct ifid *)fhp; 977 ifhp->ifid_len = sizeof(struct ifid); 978 979 ifhp->ifid_ino = ip->i_number; 980 ifhp->ifid_start = ip->iso_start; 981 982 #ifdef ISOFS_DBG 983 printf("vptofh: ino %d, start %ld\n", 984 ifhp->ifid_ino,ifhp->ifid_start); 985 #endif 986 return 0; 987 } 988 989 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 990 { 991 992 sysctl_createv(clog, 0, NULL, NULL, 993 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 994 NULL, 0, NULL, 0, 995 CTL_VFS, CTL_EOL); 996 sysctl_createv(clog, 0, NULL, NULL, 997 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 998 SYSCTL_DESCR("ISO-9660 file system"), 999 NULL, 0, NULL, 0, 1000 CTL_VFS, 14, CTL_EOL); 1001 1002 sysctl_createv(clog, 0, NULL, NULL, 1003 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1004 CTLTYPE_INT, "utf8_joliet", 1005 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 1006 NULL, 0, &cd9660_utf8_joliet, 0, 1007 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 1008 1009 } 1010
Indexes created Fri Sep 26 08:10:20 GMT 2025