cd9660_vfsops.c revision 1.40.6.1
1 /* $NetBSD: cd9660_vfsops.c,v 1.40.6.1 2007/12/09 16:04:00 reinoud 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 1.40.6.1 2007/12/09 16:04:00 reinoud 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 vfs_stdsuspendctl, 107 cd9660_vnodeopv_descs, 108 0, /* refcount */ 109 { NULL, NULL } /* list */ 110 }; 111 VFS_ATTACH(cd9660_vfsops); 112 113 static const struct genfs_ops cd9660_genfsops = { 114 .gop_size = genfs_size, 115 }; 116 117 /* 118 * Called by vfs_mountroot when iso is going to be mounted as root. 119 * 120 * Name is updated by mount(8) after booting. 121 */ 122 #define ROOTNAME "root_device" 123 124 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 125 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 126 struct lwp *l, struct iso_args *argp); 127 128 int 129 cd9660_mountroot() 130 { 131 struct mount *mp; 132 struct lwp *l = curlwp; /* XXX */ 133 int error; 134 struct iso_args args; 135 136 if (device_class(root_device) != DV_DISK) 137 return (ENODEV); 138 139 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 140 != 0) { 141 vrele(rootvp); 142 return (error); 143 } 144 145 args.flags = ISOFSMNT_ROOT; 146 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 147 mp->mnt_op->vfs_refcount--; 148 vfs_unbusy(mp); 149 free(mp, M_MOUNT); 150 return (error); 151 } 152 simple_lock(&mountlist_slock); 153 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 154 simple_unlock(&mountlist_slock); 155 (void)cd9660_statvfs(mp, &mp->mnt_stat, l); 156 vfs_unbusy(mp); 157 return (0); 158 } 159 160 /* 161 * VFS Operations. 162 * 163 * mount system call 164 */ 165 int 166 cd9660_mount(mp, path, data, ndp, l) 167 struct mount *mp; 168 const char *path; 169 void *data; 170 struct nameidata *ndp; 171 struct lwp *l; 172 { 173 struct vnode *devvp; 174 struct iso_args args; 175 int error; 176 struct iso_mnt *imp = VFSTOISOFS(mp); 177 178 if (mp->mnt_flag & MNT_GETARGS) { 179 if (imp == NULL) 180 return EIO; 181 args.fspec = NULL; 182 args.flags = imp->im_flags; 183 return copyout(&args, data, sizeof(args)); 184 } 185 error = copyin(data, &args, sizeof (struct iso_args)); 186 if (error) 187 return (error); 188 189 if ((mp->mnt_flag & MNT_RDONLY) == 0) 190 return (EROFS); 191 192 if ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 193 return EINVAL; 194 195 /* 196 * Not an update, or updating the name: look up the name 197 * and verify that it refers to a sensible block device. 198 */ 199 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 200 if ((error = namei(ndp)) != 0) 201 return (error); 202 devvp = ndp->ni_vp; 203 204 if (devvp->v_type != VBLK) { 205 vrele(devvp); 206 return ENOTBLK; 207 } 208 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 209 vrele(devvp); 210 return ENXIO; 211 } 212 /* 213 * If mount by non-root, then verify that user has necessary 214 * permissions on the device. 215 */ 216 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) { 217 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 218 error = VOP_ACCESS(devvp, VREAD, l->l_cred, l); 219 VOP_UNLOCK(devvp, 0); 220 if (error) { 221 vrele(devvp); 222 return (error); 223 } 224 } 225 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 226 /* 227 * Disallow multiple mounts of the same device. 228 * Disallow mounting of a device that is currently in use 229 * (except for root, which might share swap device for 230 * miniroot). 231 */ 232 error = vfs_mountedon(devvp); 233 if (error) 234 goto fail; 235 if (vcount(devvp) > 1 && devvp != rootvp) { 236 error = EBUSY; 237 goto fail; 238 } 239 error = VOP_OPEN(devvp, FREAD, FSCRED, l); 240 if (error) 241 goto fail; 242 error = iso_mountfs(devvp, mp, l, &args); 243 if (error) { 244 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 245 (void)VOP_CLOSE(devvp, FREAD, NOCRED, l); 246 VOP_UNLOCK(devvp, 0); 247 goto fail; 248 } 249 } else { 250 vrele(devvp); 251 if (devvp != imp->im_devvp) 252 return (EINVAL); /* needs translation */ 253 } 254 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 255 mp, l); 256 257 fail: 258 vrele(devvp); 259 return (error); 260 } 261 262 /* 263 * Make a mount point from a volume descriptor 264 */ 265 static int 266 iso_makemp(isomp, bp, ea_len) 267 struct iso_mnt *isomp; 268 struct buf *bp; 269 int *ea_len; 270 { 271 struct iso_primary_descriptor *pri; 272 int logical_block_size; 273 struct iso_directory_record *rootp; 274 275 pri = (struct iso_primary_descriptor *)bp->b_data; 276 277 logical_block_size = isonum_723 (pri->logical_block_size); 278 279 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 280 || (logical_block_size & (logical_block_size - 1)) != 0) 281 return -1; 282 283 rootp = (struct iso_directory_record *)pri->root_directory_record; 284 285 isomp->logical_block_size = logical_block_size; 286 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 287 memcpy(isomp->root, rootp, sizeof(isomp->root)); 288 isomp->root_extent = isonum_733 (rootp->extent); 289 isomp->root_size = isonum_733 (rootp->size); 290 isomp->im_joliet_level = 0; 291 292 isomp->im_bmask = logical_block_size - 1; 293 isomp->im_bshift = 0; 294 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 295 isomp->im_bshift++; 296 297 if (ea_len != NULL) 298 *ea_len = isonum_711(rootp->ext_attr_length); 299 300 return 0; 301 } 302 303 /* 304 * Common code for mount and mountroot 305 */ 306 static int 307 iso_mountfs(devvp, mp, l, argp) 308 struct vnode *devvp; 309 struct mount *mp; 310 struct lwp *l; 311 struct iso_args *argp; 312 { 313 struct iso_mnt *isomp = (struct iso_mnt *)0; 314 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 315 dev_t dev = devvp->v_rdev; 316 int error = EINVAL; 317 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 318 int iso_bsize; 319 int iso_blknum; 320 int joliet_level; 321 struct iso_volume_descriptor *vdp; 322 struct iso_supplementary_descriptor *sup; 323 int sess = 0; 324 int ext_attr_length; 325 struct disklabel label; 326 327 if (!ronly) 328 return EROFS; 329 330 /* Flush out any old buffers remaining from a previous use. */ 331 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 332 return (error); 333 334 /* This is the "logical sector size". The standard says this 335 * should be 2048 or the physical sector size on the device, 336 * whichever is greater. For now, we'll just use a constant. 337 */ 338 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 339 340 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, l); 341 if (!error && 342 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 343 /* XXX more sanity checks? */ 344 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 345 } else { 346 /* fallback to old method */ 347 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, l); 348 if (error) 349 sess = 0; /* never mind */ 350 } 351 #ifdef ISO_DEBUG 352 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 353 #endif 354 355 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 356 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 357 iso_bsize, NOCRED, &bp)) != 0) 358 goto out; 359 360 vdp = (struct iso_volume_descriptor *)bp->b_data; 361 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 362 error = EINVAL; 363 goto out; 364 } 365 366 switch (isonum_711(vdp->type)) { 367 case ISO_VD_PRIMARY: 368 if (pribp == NULL) { 369 pribp = bp; 370 bp = NULL; 371 } 372 break; 373 374 case ISO_VD_SUPPLEMENTARY: 375 if (supbp == NULL) { 376 supbp = bp; 377 bp = NULL; 378 } 379 break; 380 381 default: 382 break; 383 } 384 385 if (isonum_711 (vdp->type) == ISO_VD_END) { 386 brelse(bp); 387 bp = NULL; 388 break; 389 } 390 391 if (bp != NULL) { 392 brelse(bp); 393 bp = NULL; 394 } 395 } 396 397 if (pribp == NULL) { 398 error = EINVAL; 399 goto out; 400 } 401 402 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 403 memset(isomp, 0, sizeof *isomp); 404 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 405 error = EINVAL; 406 goto out; 407 } 408 409 isomp->volume_space_size += sess; 410 411 pribp->b_flags |= B_AGE; 412 brelse(pribp); 413 pribp = NULL; 414 415 mp->mnt_data = isomp; 416 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 417 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 418 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 419 mp->mnt_stat.f_namemax = MAXNAMLEN; 420 mp->mnt_flag |= MNT_LOCAL; 421 mp->mnt_dev_bshift = iso_bsize; 422 mp->mnt_fs_bshift = isomp->im_bshift; 423 isomp->im_mountp = mp; 424 isomp->im_dev = dev; 425 isomp->im_devvp = devvp; 426 427 /* Check the Rock Ridge Extension support */ 428 if (!(argp->flags & ISOFSMNT_NORRIP)) { 429 struct iso_directory_record *rootp; 430 431 if ((error = bread(isomp->im_devvp, 432 (isomp->root_extent + ext_attr_length) << 433 (isomp->im_bshift - DEV_BSHIFT), 434 isomp->logical_block_size, NOCRED, 435 &bp)) != 0) 436 goto out; 437 438 rootp = (struct iso_directory_record *)bp->b_data; 439 440 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 441 argp->flags |= ISOFSMNT_NORRIP; 442 } else { 443 argp->flags &= ~ISOFSMNT_GENS; 444 } 445 446 /* 447 * The contents are valid, 448 * but they will get reread as part of another vnode, so... 449 */ 450 bp->b_flags |= B_AGE; 451 brelse(bp); 452 bp = NULL; 453 } 454 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 455 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 456 457 if (isomp->im_flags & ISOFSMNT_GENS) 458 isomp->iso_ftype = ISO_FTYPE_9660; 459 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 460 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 461 if (argp->flags & ISOFSMNT_NOCASETRANS) 462 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 463 } else 464 isomp->iso_ftype = ISO_FTYPE_RRIP; 465 466 /* Check the Joliet Extension support */ 467 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 468 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 469 supbp != NULL) { 470 joliet_level = 0; 471 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 472 473 if ((isonum_711(sup->flags) & 1) == 0) { 474 if (memcmp(sup->escape, "%/@", 3) == 0) 475 joliet_level = 1; 476 if (memcmp(sup->escape, "%/C", 3) == 0) 477 joliet_level = 2; 478 if (memcmp(sup->escape, "%/E", 3) == 0) 479 joliet_level = 3; 480 } 481 if (joliet_level != 0) { 482 if (iso_makemp(isomp, supbp, NULL) == -1) { 483 error = EINVAL; 484 goto out; 485 } 486 isomp->im_joliet_level = joliet_level; 487 } 488 } 489 490 if (supbp != NULL) { 491 brelse(supbp); 492 supbp = NULL; 493 } 494 495 devvp->v_specmountpoint = mp; 496 497 return 0; 498 out: 499 if (bp) 500 brelse(bp); 501 if (pribp) 502 brelse(pribp); 503 if (supbp) 504 brelse(supbp); 505 if (isomp) { 506 free(isomp, M_ISOFSMNT); 507 mp->mnt_data = NULL; 508 } 509 return error; 510 } 511 512 /* 513 * Make a filesystem operational. 514 * Nothing to do at the moment. 515 */ 516 /* ARGSUSED */ 517 int 518 cd9660_start(struct mount *mp, int flags, 519 struct lwp *l) 520 { 521 return 0; 522 } 523 524 /* 525 * unmount system call 526 */ 527 int 528 cd9660_unmount(mp, mntflags, l) 529 struct mount *mp; 530 int mntflags; 531 struct lwp *l; 532 { 533 struct iso_mnt *isomp; 534 int error, flags = 0; 535 536 if (mntflags & MNT_FORCE) 537 flags |= FORCECLOSE; 538 #if 0 539 mntflushbuf(mp, 0); 540 if (mntinvalbuf(mp)) 541 return EBUSY; 542 #endif 543 if ((error = vflush(mp, NULLVP, flags)) != 0) 544 return (error); 545 546 isomp = VFSTOISOFS(mp); 547 548 if (isomp->im_devvp->v_type != VBAD) 549 isomp->im_devvp->v_specmountpoint = NULL; 550 551 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 552 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, l); 553 vput(isomp->im_devvp); 554 free(isomp, M_ISOFSMNT); 555 mp->mnt_data = NULL; 556 mp->mnt_flag &= ~MNT_LOCAL; 557 return (error); 558 } 559 560 /* 561 * Return root of a filesystem 562 */ 563 int 564 cd9660_root(mp, vpp) 565 struct mount *mp; 566 struct vnode **vpp; 567 { 568 struct iso_mnt *imp = VFSTOISOFS(mp); 569 struct iso_directory_record *dp = 570 (struct iso_directory_record *)imp->root; 571 ino_t ino = isodirino(dp, imp); 572 573 /* 574 * With RRIP we must use the `.' entry of the root directory. 575 * Simply tell vget, that it's a relocated directory. 576 */ 577 return (cd9660_vget_internal(mp, ino, vpp, 578 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 579 } 580 581 /* 582 * Do operations associated with quotas, not supported 583 */ 584 /* ARGSUSED */ 585 int 586 cd9660_quotactl( 587 struct mount *mp, 588 int cmd, 589 uid_t uid, 590 void *arg, 591 struct lwp *l) 592 { 593 594 return (EOPNOTSUPP); 595 } 596 597 /* 598 * Get file system statistics. 599 */ 600 int 601 cd9660_statvfs( 602 struct mount *mp, 603 struct statvfs *sbp, 604 struct lwp *l) 605 { 606 struct iso_mnt *isomp; 607 608 isomp = VFSTOISOFS(mp); 609 610 sbp->f_bsize = isomp->logical_block_size; 611 sbp->f_frsize = sbp->f_bsize; 612 sbp->f_iosize = sbp->f_bsize; /* XXX */ 613 sbp->f_blocks = isomp->volume_space_size; 614 sbp->f_bfree = 0; /* total free blocks */ 615 sbp->f_bavail = 0; /* blocks free for non superuser */ 616 sbp->f_bresvd = 0; /* total reserved blocks */ 617 sbp->f_files = 0; /* total files */ 618 sbp->f_ffree = 0; /* free file nodes */ 619 sbp->f_favail = 0; /* free file nodes for non superuser */ 620 sbp->f_fresvd = 0; /* reserved file nodes */ 621 copy_statvfs_info(sbp, mp); 622 /* Use the first spare for flags: */ 623 sbp->f_spare[0] = isomp->im_flags; 624 return 0; 625 } 626 627 /* ARGSUSED */ 628 int 629 cd9660_sync( 630 struct mount *mp, 631 int waitfor, 632 kauth_cred_t cred, 633 struct lwp *l) 634 { 635 return (0); 636 } 637 638 /* 639 * File handle to vnode 640 * 641 * Have to be really careful about stale file handles: 642 * - check that the inode number is in range 643 * - call iget() to get the locked inode 644 * - check for an unallocated inode (i_mode == 0) 645 * - check that the generation number matches 646 */ 647 648 struct ifid { 649 ushort ifid_len; 650 ushort ifid_pad; 651 int ifid_ino; 652 long ifid_start; 653 }; 654 655 /* ARGSUSED */ 656 int 657 cd9660_fhtovp(mp, fhp, vpp) 658 struct mount *mp; 659 struct fid *fhp; 660 struct vnode **vpp; 661 { 662 struct ifid ifh; 663 struct iso_node *ip; 664 struct vnode *nvp; 665 int error; 666 667 if (fhp->fid_len != sizeof(ifh)) 668 return EINVAL; 669 670 memcpy(&ifh, fhp, sizeof(ifh)); 671 #ifdef ISOFS_DBG 672 printf("fhtovp: ino %d, start %ld\n", 673 ifh.ifid_ino, ifh.ifid_start); 674 #endif 675 676 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 677 *vpp = NULLVP; 678 return (error); 679 } 680 ip = VTOI(nvp); 681 if (ip->inode.iso_mode == 0) { 682 vput(nvp); 683 *vpp = NULLVP; 684 return (ESTALE); 685 } 686 *vpp = nvp; 687 return (0); 688 } 689 690 int 691 cd9660_vget(mp, ino, vpp) 692 struct mount *mp; 693 ino_t ino; 694 struct vnode **vpp; 695 { 696 697 /* 698 * XXXX 699 * It would be nice if we didn't always set the `relocated' flag 700 * and force the extra read, but I don't want to think about fixing 701 * that right now. 702 */ 703 return (cd9660_vget_internal(mp, ino, vpp, 704 #if 0 705 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 706 #else 707 0, 708 #endif 709 NULL)); 710 } 711 712 int 713 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 714 struct mount *mp; 715 ino_t ino; 716 struct vnode **vpp; 717 int relocated; 718 struct iso_directory_record *isodir; 719 { 720 struct iso_mnt *imp; 721 struct iso_node *ip; 722 struct buf *bp; 723 struct vnode *vp, *nvp; 724 dev_t dev; 725 int error; 726 727 imp = VFSTOISOFS(mp); 728 dev = imp->im_dev; 729 730 retry: 731 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP) 732 return (0); 733 734 /* Allocate a new vnode/iso_node. */ 735 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 736 *vpp = NULLVP; 737 return (error); 738 } 739 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 740 741 /* 742 * If someone beat us to it, put back the freshly allocated 743 * vnode/inode pair and retry. 744 */ 745 mutex_enter(&cd9660_hashlock); 746 if (cd9660_ihashget(dev, ino, 0) != NULL) { 747 mutex_exit(&cd9660_hashlock); 748 ungetnewvnode(vp); 749 pool_put(&cd9660_node_pool, ip); 750 goto retry; 751 } 752 753 memset(ip, 0, sizeof(struct iso_node)); 754 vp->v_data = ip; 755 ip->i_vnode = vp; 756 ip->i_dev = dev; 757 ip->i_number = ino; 758 ip->i_mnt = imp; 759 ip->i_devvp = imp->im_devvp; 760 genfs_node_init(vp, &cd9660_genfsops); 761 762 /* 763 * Put it onto its hash chain and lock it so that other requests for 764 * this inode will block if they arrive while we are sleeping waiting 765 * for old data structures to be purged or for the contents of the 766 * disk portion of this inode to be read. 767 */ 768 cd9660_ihashins(ip); 769 mutex_exit(&cd9660_hashlock); 770 771 if (isodir == 0) { 772 int lbn, off; 773 774 lbn = lblkno(imp, ino); 775 if (lbn >= imp->volume_space_size) { 776 vput(vp); 777 printf("fhtovp: lbn exceed volume space %d\n", lbn); 778 return (ESTALE); 779 } 780 781 off = blkoff(imp, ino); 782 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 783 vput(vp); 784 printf("fhtovp: crosses block boundary %d\n", 785 off + ISO_DIRECTORY_RECORD_SIZE); 786 return (ESTALE); 787 } 788 789 error = bread(imp->im_devvp, 790 lbn << (imp->im_bshift - DEV_BSHIFT), 791 imp->logical_block_size, NOCRED, &bp); 792 if (error) { 793 vput(vp); 794 brelse(bp); 795 printf("fhtovp: bread error %d\n",error); 796 return (error); 797 } 798 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 799 800 if (off + isonum_711(isodir->length) > 801 imp->logical_block_size) { 802 vput(vp); 803 if (bp != 0) 804 brelse(bp); 805 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 806 off +isonum_711(isodir->length), off, 807 isonum_711(isodir->length)); 808 return (ESTALE); 809 } 810 811 #if 0 812 if (isonum_733(isodir->extent) + 813 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 814 if (bp != 0) 815 brelse(bp); 816 printf("fhtovp: file start miss %d vs %d\n", 817 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 818 ifhp->ifid_start); 819 return (ESTALE); 820 } 821 #endif 822 } else 823 bp = 0; 824 825 VREF(ip->i_devvp); 826 827 if (relocated) { 828 /* 829 * On relocated directories we must 830 * read the `.' entry out of a dir. 831 */ 832 ip->iso_start = ino >> imp->im_bshift; 833 if (bp != 0) 834 brelse(bp); 835 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 836 vput(vp); 837 return (error); 838 } 839 isodir = (struct iso_directory_record *)bp->b_data; 840 } 841 842 ip->iso_extent = isonum_733(isodir->extent); 843 ip->i_size = isonum_733(isodir->size); 844 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 845 846 /* 847 * Setup time stamp, attribute 848 */ 849 vp->v_type = VNON; 850 switch (imp->iso_ftype) { 851 default: /* ISO_FTYPE_9660 */ 852 { 853 struct buf *bp2; 854 int off; 855 if ((imp->im_flags & ISOFSMNT_EXTATT) 856 && (off = isonum_711(isodir->ext_attr_length))) 857 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 858 NULL, &bp2); 859 else 860 bp2 = NULL; 861 cd9660_defattr(isodir, ip, bp2); 862 cd9660_deftstamp(isodir, ip, bp2); 863 if (bp2) 864 brelse(bp2); 865 break; 866 } 867 case ISO_FTYPE_RRIP: 868 cd9660_rrip_analyze(isodir, ip, imp); 869 break; 870 } 871 872 if (bp != 0) 873 brelse(bp); 874 875 /* 876 * Initialize the associated vnode 877 */ 878 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 879 case VFIFO: 880 vp->v_op = cd9660_fifoop_p; 881 break; 882 case VCHR: 883 case VBLK: 884 /* 885 * if device, look at device number table for translation 886 */ 887 vp->v_op = cd9660_specop_p; 888 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 889 /* 890 * Discard unneeded vnode, but save its iso_node. 891 * Note that the lock is carried over in the iso_node 892 * to the replacement vnode. 893 */ 894 nvp->v_data = vp->v_data; 895 vp->v_data = NULL; 896 VOP_UNLOCK(vp, 0); 897 vp->v_op = spec_vnodeop_p; 898 vrele(vp); 899 vgone(vp); 900 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 901 /* 902 * Reinitialize aliased inode. 903 */ 904 vp = nvp; 905 ip->i_vnode = vp; 906 } 907 break; 908 case VLNK: 909 case VNON: 910 case VSOCK: 911 case VDIR: 912 case VBAD: 913 break; 914 case VREG: 915 uvm_vnp_setsize(vp, ip->i_size); 916 break; 917 } 918 919 if (ip->iso_extent == imp->root_extent) 920 vp->v_flag |= VROOT; 921 922 /* 923 * XXX need generation number? 924 */ 925 926 *vpp = vp; 927 return (0); 928 } 929 930 /* 931 * Vnode pointer to File handle 932 */ 933 /* ARGSUSED */ 934 int 935 cd9660_vptofh(vp, fhp, fh_size) 936 struct vnode *vp; 937 struct fid *fhp; 938 size_t *fh_size; 939 { 940 struct iso_node *ip = VTOI(vp); 941 struct ifid ifh; 942 943 if (*fh_size < sizeof(struct ifid)) { 944 *fh_size = sizeof(struct ifid); 945 return E2BIG; 946 } 947 *fh_size = sizeof(struct ifid); 948 949 memset(&ifh, 0, sizeof(ifh)); 950 ifh.ifid_len = sizeof(struct ifid); 951 ifh.ifid_ino = ip->i_number; 952 ifh.ifid_start = ip->iso_start; 953 memcpy(fhp, &ifh, sizeof(ifh)); 954 955 #ifdef ISOFS_DBG 956 printf("vptofh: ino %d, start %ld\n", 957 ifh.ifid_ino,ifh.ifid_start); 958 #endif 959 return 0; 960 } 961 962 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 963 { 964 965 sysctl_createv(clog, 0, NULL, NULL, 966 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 967 NULL, 0, NULL, 0, 968 CTL_VFS, CTL_EOL); 969 sysctl_createv(clog, 0, NULL, NULL, 970 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 971 SYSCTL_DESCR("ISO-9660 file system"), 972 NULL, 0, NULL, 0, 973 CTL_VFS, 14, CTL_EOL); 974 975 sysctl_createv(clog, 0, NULL, NULL, 976 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 977 CTLTYPE_INT, "utf8_joliet", 978 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 979 NULL, 0, &cd9660_utf8_joliet, 0, 980 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 981 982 } 983
Indexes created Mon Oct 20 08:09:54 GMT 2025