cd9660_vfsops.c revision 1.40.2.10
1 /* $NetBSD: cd9660_vfsops.c,v 1.40.2.10 2007/10/24 16:23:21 ad 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 1.40.2.10 2007/10/24 16:23:21 ad 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_JUSTDEFINE(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 sizeof (struct iso_args), 91 cd9660_mount, 92 cd9660_start, 93 cd9660_unmount, 94 cd9660_root, 95 cd9660_quotactl, 96 cd9660_statvfs, 97 cd9660_sync, 98 cd9660_vget, 99 cd9660_fhtovp, 100 cd9660_vptofh, 101 cd9660_init, 102 cd9660_reinit, 103 cd9660_done, 104 cd9660_mountroot, 105 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 106 vfs_stdextattrctl, 107 (void *)eopnotsupp, /* vfs_suspendctl */ 108 cd9660_vnodeopv_descs, 109 0, /* refcount */ 110 { NULL, NULL } /* list */ 111 }; 112 VFS_ATTACH(cd9660_vfsops); 113 114 static const struct genfs_ops cd9660_genfsops = { 115 .gop_size = genfs_size, 116 }; 117 118 /* 119 * Called by vfs_mountroot when iso is going to be mounted as root. 120 * 121 * Name is updated by mount(8) after booting. 122 */ 123 #define ROOTNAME "root_device" 124 125 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 126 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 127 struct lwp *l, struct iso_args *argp); 128 129 int 130 cd9660_mountroot() 131 { 132 struct mount *mp; 133 struct lwp *l = curlwp; /* XXX */ 134 int error; 135 struct iso_args args; 136 137 if (device_class(root_device) != DV_DISK) 138 return (ENODEV); 139 140 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 141 != 0) { 142 vrele(rootvp); 143 return (error); 144 } 145 146 args.flags = ISOFSMNT_ROOT; 147 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 148 mp->mnt_op->vfs_refcount--; 149 vfs_unbusy(mp); 150 vfs_destroy(mp); 151 return (error); 152 } 153 mutex_enter(&mountlist_lock); 154 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 155 mutex_exit(&mountlist_lock); 156 (void)cd9660_statvfs(mp, &mp->mnt_stat, l); 157 vfs_unbusy(mp); 158 return (0); 159 } 160 161 /* 162 * VFS Operations. 163 * 164 * mount system call 165 */ 166 int 167 cd9660_mount(mp, path, data, data_len, l) 168 struct mount *mp; 169 const char *path; 170 void *data; 171 size_t *data_len; 172 struct lwp *l; 173 { 174 struct nameidata nd; 175 struct vnode *devvp; 176 struct iso_args *args = data; 177 int error; 178 struct iso_mnt *imp = VFSTOISOFS(mp); 179 180 if (*data_len < sizeof *args) 181 return EINVAL; 182 183 if (mp->mnt_flag & MNT_GETARGS) { 184 if (imp == NULL) 185 return EIO; 186 args->fspec = NULL; 187 args->flags = imp->im_flags; 188 *data_len = sizeof (*args); 189 return 0; 190 } 191 192 if ((mp->mnt_flag & MNT_RDONLY) == 0) 193 return (EROFS); 194 195 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 196 return EINVAL; 197 198 /* 199 * Not an update, or updating the name: look up the name 200 * and verify that it refers to a sensible block device. 201 */ 202 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec, l); 203 if ((error = namei(&nd)) != 0) 204 return (error); 205 devvp = nd.ni_vp; 206 207 if (devvp->v_type != VBLK) { 208 vrele(devvp); 209 return ENOTBLK; 210 } 211 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 212 vrele(devvp); 213 return ENXIO; 214 } 215 /* 216 * If mount by non-root, then verify that user has necessary 217 * permissions on the device. 218 */ 219 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) { 220 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 221 error = VOP_ACCESS(devvp, VREAD, l->l_cred, l); 222 VOP_UNLOCK(devvp, 0); 223 if (error) { 224 vrele(devvp); 225 return (error); 226 } 227 } 228 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 229 /* 230 * Disallow multiple mounts of the same device. 231 * Disallow mounting of a device that is currently in use 232 * (except for root, which might share swap device for 233 * miniroot). 234 */ 235 error = vfs_mountedon(devvp); 236 if (error) 237 goto fail; 238 if (vcount(devvp) > 1 && devvp != rootvp) { 239 error = EBUSY; 240 goto fail; 241 } 242 error = VOP_OPEN(devvp, FREAD, FSCRED, l); 243 if (error) 244 goto fail; 245 error = iso_mountfs(devvp, mp, l, args); 246 if (error) { 247 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 248 (void)VOP_CLOSE(devvp, FREAD, NOCRED, l); 249 VOP_UNLOCK(devvp, 0); 250 goto fail; 251 } 252 } else { 253 vrele(devvp); 254 if (devvp != imp->im_devvp) 255 return (EINVAL); /* needs translation */ 256 } 257 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 258 mp->mnt_op->vfs_name, mp, l); 259 260 fail: 261 vrele(devvp); 262 return (error); 263 } 264 265 /* 266 * Make a mount point from a volume descriptor 267 */ 268 static int 269 iso_makemp(isomp, bp, ea_len) 270 struct iso_mnt *isomp; 271 struct buf *bp; 272 int *ea_len; 273 { 274 struct iso_primary_descriptor *pri; 275 int logical_block_size; 276 struct iso_directory_record *rootp; 277 278 pri = (struct iso_primary_descriptor *)bp->b_data; 279 280 logical_block_size = isonum_723 (pri->logical_block_size); 281 282 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 283 || (logical_block_size & (logical_block_size - 1)) != 0) 284 return -1; 285 286 rootp = (struct iso_directory_record *)pri->root_directory_record; 287 288 isomp->logical_block_size = logical_block_size; 289 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 290 memcpy(isomp->root, rootp, sizeof(isomp->root)); 291 isomp->root_extent = isonum_733 (rootp->extent); 292 isomp->root_size = isonum_733 (rootp->size); 293 isomp->im_joliet_level = 0; 294 295 isomp->im_bmask = logical_block_size - 1; 296 isomp->im_bshift = 0; 297 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 298 isomp->im_bshift++; 299 300 if (ea_len != NULL) 301 *ea_len = isonum_711(rootp->ext_attr_length); 302 303 return 0; 304 } 305 306 /* 307 * Common code for mount and mountroot 308 */ 309 static int 310 iso_mountfs(devvp, mp, l, argp) 311 struct vnode *devvp; 312 struct mount *mp; 313 struct lwp *l; 314 struct iso_args *argp; 315 { 316 struct iso_mnt *isomp = (struct iso_mnt *)0; 317 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 318 dev_t dev = devvp->v_rdev; 319 int error = EINVAL; 320 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 321 int iso_bsize; 322 int iso_blknum; 323 int joliet_level; 324 struct iso_volume_descriptor *vdp; 325 struct iso_supplementary_descriptor *sup; 326 int sess = 0; 327 int ext_attr_length; 328 struct disklabel label; 329 330 if (!ronly) 331 return EROFS; 332 333 /* Flush out any old buffers remaining from a previous use. */ 334 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 335 return (error); 336 337 /* This is the "logical sector size". The standard says this 338 * should be 2048 or the physical sector size on the device, 339 * whichever is greater. For now, we'll just use a constant. 340 */ 341 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 342 343 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, l); 344 if (!error && 345 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 346 /* XXX more sanity checks? */ 347 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 348 } else { 349 /* fallback to old method */ 350 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, l); 351 if (error) 352 sess = 0; /* never mind */ 353 } 354 #ifdef ISO_DEBUG 355 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 356 #endif 357 358 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 359 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 360 iso_bsize, NOCRED, &bp)) != 0) 361 goto out; 362 363 vdp = (struct iso_volume_descriptor *)bp->b_data; 364 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 365 error = EINVAL; 366 goto out; 367 } 368 369 switch (isonum_711(vdp->type)) { 370 case ISO_VD_PRIMARY: 371 if (pribp == NULL) { 372 pribp = bp; 373 bp = NULL; 374 } 375 break; 376 377 case ISO_VD_SUPPLEMENTARY: 378 if (supbp == NULL) { 379 supbp = bp; 380 bp = NULL; 381 } 382 break; 383 384 default: 385 break; 386 } 387 388 if (isonum_711 (vdp->type) == ISO_VD_END) { 389 brelse(bp, 0); 390 bp = NULL; 391 break; 392 } 393 394 if (bp != NULL) { 395 brelse(bp, 0); 396 bp = NULL; 397 } 398 } 399 400 if (pribp == NULL) { 401 error = EINVAL; 402 goto out; 403 } 404 405 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 406 memset(isomp, 0, sizeof *isomp); 407 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 408 error = EINVAL; 409 goto out; 410 } 411 412 isomp->volume_space_size += sess; 413 414 brelse(pribp, BC_AGE); 415 pribp = NULL; 416 417 mp->mnt_data = isomp; 418 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 419 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 420 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 421 mp->mnt_stat.f_namemax = MAXNAMLEN; 422 mp->mnt_flag |= MNT_LOCAL; 423 mp->mnt_iflag |= IMNT_MPSAFE; 424 mp->mnt_dev_bshift = iso_bsize; 425 mp->mnt_fs_bshift = isomp->im_bshift; 426 isomp->im_mountp = mp; 427 isomp->im_dev = dev; 428 isomp->im_devvp = devvp; 429 430 /* Check the Rock Ridge Extension support */ 431 if (!(argp->flags & ISOFSMNT_NORRIP)) { 432 struct iso_directory_record *rootp; 433 434 if ((error = bread(isomp->im_devvp, 435 (isomp->root_extent + ext_attr_length) << 436 (isomp->im_bshift - DEV_BSHIFT), 437 isomp->logical_block_size, NOCRED, 438 &bp)) != 0) 439 goto out; 440 441 rootp = (struct iso_directory_record *)bp->b_data; 442 443 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 444 argp->flags |= ISOFSMNT_NORRIP; 445 } else { 446 argp->flags &= ~ISOFSMNT_GENS; 447 } 448 449 /* 450 * The contents are valid, 451 * but they will get reread as part of another vnode, so... 452 */ 453 brelse(bp, BC_AGE); 454 bp = NULL; 455 } 456 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 457 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 458 459 if (isomp->im_flags & ISOFSMNT_GENS) 460 isomp->iso_ftype = ISO_FTYPE_9660; 461 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 462 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 463 if (argp->flags & ISOFSMNT_NOCASETRANS) 464 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 465 } else 466 isomp->iso_ftype = ISO_FTYPE_RRIP; 467 468 /* Check the Joliet Extension support */ 469 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 470 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 471 supbp != NULL) { 472 joliet_level = 0; 473 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 474 475 if ((isonum_711(sup->flags) & 1) == 0) { 476 if (memcmp(sup->escape, "%/@", 3) == 0) 477 joliet_level = 1; 478 if (memcmp(sup->escape, "%/C", 3) == 0) 479 joliet_level = 2; 480 if (memcmp(sup->escape, "%/E", 3) == 0) 481 joliet_level = 3; 482 } 483 if (joliet_level != 0) { 484 if (iso_makemp(isomp, supbp, NULL) == -1) { 485 error = EINVAL; 486 goto out; 487 } 488 isomp->im_joliet_level = joliet_level; 489 } 490 } 491 492 if (supbp != NULL) { 493 brelse(supbp, 0); 494 supbp = NULL; 495 } 496 497 devvp->v_specmountpoint = mp; 498 499 return 0; 500 out: 501 if (bp) 502 brelse(bp, 0); 503 if (pribp) 504 brelse(pribp, 0); 505 if (supbp) 506 brelse(supbp, 0); 507 if (isomp) { 508 free(isomp, M_ISOFSMNT); 509 mp->mnt_data = NULL; 510 } 511 return error; 512 } 513 514 /* 515 * Make a filesystem operational. 516 * Nothing to do at the moment. 517 */ 518 /* ARGSUSED */ 519 int 520 cd9660_start(struct mount *mp, int flags, 521 struct lwp *l) 522 { 523 return 0; 524 } 525 526 /* 527 * unmount system call 528 */ 529 int 530 cd9660_unmount(mp, mntflags, l) 531 struct mount *mp; 532 int mntflags; 533 struct lwp *l; 534 { 535 struct iso_mnt *isomp; 536 int error, flags = 0; 537 538 if (mntflags & MNT_FORCE) 539 flags |= FORCECLOSE; 540 if ((error = vflush(mp, NULLVP, flags)) != 0) 541 return (error); 542 543 isomp = VFSTOISOFS(mp); 544 545 if (isomp->im_devvp->v_type != VBAD) 546 isomp->im_devvp->v_specmountpoint = NULL; 547 548 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 549 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, l); 550 vput(isomp->im_devvp); 551 free(isomp, M_ISOFSMNT); 552 mp->mnt_data = NULL; 553 mp->mnt_flag &= ~MNT_LOCAL; 554 return (error); 555 } 556 557 /* 558 * Return root of a filesystem 559 */ 560 int 561 cd9660_root(mp, vpp) 562 struct mount *mp; 563 struct vnode **vpp; 564 { 565 struct iso_mnt *imp = VFSTOISOFS(mp); 566 struct iso_directory_record *dp = 567 (struct iso_directory_record *)imp->root; 568 ino_t ino = isodirino(dp, imp); 569 570 /* 571 * With RRIP we must use the `.' entry of the root directory. 572 * Simply tell vget, that it's a relocated directory. 573 */ 574 return (cd9660_vget_internal(mp, ino, vpp, 575 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 576 } 577 578 /* 579 * Do operations associated with quotas, not supported 580 */ 581 /* ARGSUSED */ 582 int 583 cd9660_quotactl( 584 struct mount *mp, 585 int cmd, 586 uid_t uid, 587 void *arg, 588 struct lwp *l) 589 { 590 591 return (EOPNOTSUPP); 592 } 593 594 /* 595 * Get file system statistics. 596 */ 597 int 598 cd9660_statvfs( 599 struct mount *mp, 600 struct statvfs *sbp, 601 struct lwp *l) 602 { 603 struct iso_mnt *isomp; 604 605 isomp = VFSTOISOFS(mp); 606 607 sbp->f_bsize = isomp->logical_block_size; 608 sbp->f_frsize = sbp->f_bsize; 609 sbp->f_iosize = sbp->f_bsize; /* XXX */ 610 sbp->f_blocks = isomp->volume_space_size; 611 sbp->f_bfree = 0; /* total free blocks */ 612 sbp->f_bavail = 0; /* blocks free for non superuser */ 613 sbp->f_bresvd = 0; /* total reserved blocks */ 614 sbp->f_files = 0; /* total files */ 615 sbp->f_ffree = 0; /* free file nodes */ 616 sbp->f_favail = 0; /* free file nodes for non superuser */ 617 sbp->f_fresvd = 0; /* reserved file nodes */ 618 copy_statvfs_info(sbp, mp); 619 /* Use the first spare for flags: */ 620 sbp->f_spare[0] = isomp->im_flags; 621 return 0; 622 } 623 624 /* ARGSUSED */ 625 int 626 cd9660_sync( 627 struct mount *mp, 628 int waitfor, 629 kauth_cred_t cred, 630 struct lwp *l) 631 { 632 return (0); 633 } 634 635 /* 636 * File handle to vnode 637 * 638 * Have to be really careful about stale file handles: 639 * - check that the inode number is in range 640 * - call iget() to get the locked inode 641 * - check for an unallocated inode (i_mode == 0) 642 * - check that the generation number matches 643 */ 644 645 struct ifid { 646 ushort ifid_len; 647 ushort ifid_pad; 648 int ifid_ino; 649 long ifid_start; 650 }; 651 652 /* ARGSUSED */ 653 int 654 cd9660_fhtovp(mp, fhp, vpp) 655 struct mount *mp; 656 struct fid *fhp; 657 struct vnode **vpp; 658 { 659 struct ifid ifh; 660 struct iso_node *ip; 661 struct vnode *nvp; 662 int error; 663 664 if (fhp->fid_len != sizeof(ifh)) 665 return EINVAL; 666 667 memcpy(&ifh, fhp, sizeof(ifh)); 668 #ifdef ISOFS_DBG 669 printf("fhtovp: ino %d, start %ld\n", 670 ifh.ifid_ino, ifh.ifid_start); 671 #endif 672 673 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 674 *vpp = NULLVP; 675 return (error); 676 } 677 ip = VTOI(nvp); 678 if (ip->inode.iso_mode == 0) { 679 vput(nvp); 680 *vpp = NULLVP; 681 return (ESTALE); 682 } 683 *vpp = nvp; 684 return (0); 685 } 686 687 int 688 cd9660_vget(mp, ino, vpp) 689 struct mount *mp; 690 ino_t ino; 691 struct vnode **vpp; 692 { 693 694 /* 695 * XXXX 696 * It would be nice if we didn't always set the `relocated' flag 697 * and force the extra read, but I don't want to think about fixing 698 * that right now. 699 */ 700 return (cd9660_vget_internal(mp, ino, vpp, 701 #if 0 702 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 703 #else 704 0, 705 #endif 706 NULL)); 707 } 708 709 int 710 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 711 struct mount *mp; 712 ino_t ino; 713 struct vnode **vpp; 714 int relocated; 715 struct iso_directory_record *isodir; 716 { 717 struct iso_mnt *imp; 718 struct iso_node *ip; 719 struct buf *bp; 720 struct vnode *vp, *nvp; 721 dev_t dev; 722 int error; 723 724 imp = VFSTOISOFS(mp); 725 dev = imp->im_dev; 726 727 retry: 728 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP) 729 return (0); 730 731 /* Allocate a new vnode/iso_node. */ 732 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 733 *vpp = NULLVP; 734 return (error); 735 } 736 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 737 738 /* 739 * If someone beat us to it, put back the freshly allocated 740 * vnode/inode pair and retry. 741 */ 742 mutex_enter(&cd9660_hashlock); 743 if (cd9660_ihashget(dev, ino, 0) != NULL) { 744 mutex_exit(&cd9660_hashlock); 745 ungetnewvnode(vp); 746 pool_put(&cd9660_node_pool, ip); 747 goto retry; 748 } 749 750 memset(ip, 0, sizeof(struct iso_node)); 751 vp->v_data = ip; 752 ip->i_vnode = vp; 753 ip->i_dev = dev; 754 ip->i_number = ino; 755 ip->i_mnt = imp; 756 ip->i_devvp = imp->im_devvp; 757 genfs_node_init(vp, &cd9660_genfsops); 758 759 /* 760 * Put it onto its hash chain and lock it so that other requests for 761 * this inode will block if they arrive while we are sleeping waiting 762 * for old data structures to be purged or for the contents of the 763 * disk portion of this inode to be read. 764 */ 765 cd9660_ihashins(ip); 766 mutex_exit(&cd9660_hashlock); 767 768 if (isodir == 0) { 769 int lbn, off; 770 771 lbn = lblkno(imp, ino); 772 if (lbn >= imp->volume_space_size) { 773 vput(vp); 774 printf("fhtovp: lbn exceed volume space %d\n", lbn); 775 return (ESTALE); 776 } 777 778 off = blkoff(imp, ino); 779 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 780 vput(vp); 781 printf("fhtovp: crosses block boundary %d\n", 782 off + ISO_DIRECTORY_RECORD_SIZE); 783 return (ESTALE); 784 } 785 786 error = bread(imp->im_devvp, 787 lbn << (imp->im_bshift - DEV_BSHIFT), 788 imp->logical_block_size, NOCRED, &bp); 789 if (error) { 790 vput(vp); 791 brelse(bp, 0); 792 printf("fhtovp: bread error %d\n",error); 793 return (error); 794 } 795 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 796 797 if (off + isonum_711(isodir->length) > 798 imp->logical_block_size) { 799 vput(vp); 800 if (bp != 0) 801 brelse(bp, 0); 802 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 803 off +isonum_711(isodir->length), off, 804 isonum_711(isodir->length)); 805 return (ESTALE); 806 } 807 808 #if 0 809 if (isonum_733(isodir->extent) + 810 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 811 if (bp != 0) 812 brelse(bp, 0); 813 printf("fhtovp: file start miss %d vs %d\n", 814 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 815 ifhp->ifid_start); 816 return (ESTALE); 817 } 818 #endif 819 } else 820 bp = 0; 821 822 VREF(ip->i_devvp); 823 824 if (relocated) { 825 /* 826 * On relocated directories we must 827 * read the `.' entry out of a dir. 828 */ 829 ip->iso_start = ino >> imp->im_bshift; 830 if (bp != 0) 831 brelse(bp, 0); 832 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 833 vput(vp); 834 return (error); 835 } 836 isodir = (struct iso_directory_record *)bp->b_data; 837 } 838 839 ip->iso_extent = isonum_733(isodir->extent); 840 ip->i_size = isonum_733(isodir->size); 841 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 842 843 /* 844 * Setup time stamp, attribute 845 */ 846 vp->v_type = VNON; 847 switch (imp->iso_ftype) { 848 default: /* ISO_FTYPE_9660 */ 849 { 850 struct buf *bp2; 851 int off; 852 if ((imp->im_flags & ISOFSMNT_EXTATT) 853 && (off = isonum_711(isodir->ext_attr_length))) 854 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 855 NULL, &bp2); 856 else 857 bp2 = NULL; 858 cd9660_defattr(isodir, ip, bp2); 859 cd9660_deftstamp(isodir, ip, bp2); 860 if (bp2) 861 brelse(bp2, 0); 862 break; 863 } 864 case ISO_FTYPE_RRIP: 865 cd9660_rrip_analyze(isodir, ip, imp); 866 break; 867 } 868 869 if (bp != 0) 870 brelse(bp, 0); 871 872 /* 873 * Initialize the associated vnode 874 */ 875 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 876 case VFIFO: 877 vp->v_op = cd9660_fifoop_p; 878 break; 879 case VCHR: 880 case VBLK: 881 /* 882 * if device, look at device number table for translation 883 */ 884 vp->v_op = cd9660_specop_p; 885 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 886 /* 887 * Discard unneeded vnode, but save its iso_node. 888 * Note that the lock is carried over in the iso_node 889 * to the replacement vnode. 890 */ 891 nvp->v_data = vp->v_data; 892 vp->v_data = NULL; 893 VOP_UNLOCK(vp, 0); 894 vp->v_op = spec_vnodeop_p; 895 vgone(vp); 896 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 897 /* 898 * Reinitialize aliased inode. 899 */ 900 vp = nvp; 901 ip->i_vnode = vp; 902 } 903 break; 904 case VLNK: 905 case VNON: 906 case VSOCK: 907 case VDIR: 908 case VBAD: 909 break; 910 case VREG: 911 uvm_vnp_setsize(vp, ip->i_size); 912 break; 913 } 914 915 if (vp->v_type != VREG) 916 uvm_vnp_setsize(vp, 0); 917 918 if (ip->iso_extent == imp->root_extent) 919 vp->v_vflag |= VV_ROOT; 920 921 /* 922 * XXX need generation number? 923 */ 924 925 *vpp = vp; 926 return (0); 927 } 928 929 /* 930 * Vnode pointer to File handle 931 */ 932 /* ARGSUSED */ 933 int 934 cd9660_vptofh(vp, fhp, fh_size) 935 struct vnode *vp; 936 struct fid *fhp; 937 size_t *fh_size; 938 { 939 struct iso_node *ip = VTOI(vp); 940 struct ifid ifh; 941 942 if (*fh_size < sizeof(struct ifid)) { 943 *fh_size = sizeof(struct ifid); 944 return E2BIG; 945 } 946 *fh_size = sizeof(struct ifid); 947 948 memset(&ifh, 0, sizeof(ifh)); 949 ifh.ifid_len = sizeof(struct ifid); 950 ifh.ifid_ino = ip->i_number; 951 ifh.ifid_start = ip->iso_start; 952 memcpy(fhp, &ifh, sizeof(ifh)); 953 954 #ifdef ISOFS_DBG 955 printf("vptofh: ino %d, start %ld\n", 956 ifh.ifid_ino,ifh.ifid_start); 957 #endif 958 return 0; 959 } 960 961 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 962 { 963 964 sysctl_createv(clog, 0, NULL, NULL, 965 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 966 NULL, 0, NULL, 0, 967 CTL_VFS, CTL_EOL); 968 sysctl_createv(clog, 0, NULL, NULL, 969 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 970 SYSCTL_DESCR("ISO-9660 file system"), 971 NULL, 0, NULL, 0, 972 CTL_VFS, 14, CTL_EOL); 973 974 sysctl_createv(clog, 0, NULL, NULL, 975 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 976 CTLTYPE_INT, "utf8_joliet", 977 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 978 NULL, 0, &cd9660_utf8_joliet, 0, 979 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 980 981 } 982
Indexes created Wed Oct 22 13:09:56 GMT 2025