cd9660_vfsops.c revision 1.54
1 /* $NetBSD: cd9660_vfsops.c,v 1.54 2008/01/24 17:32:52 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 1.54 2008/01/24 17:32:52 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 (void *)eopnotsupp, 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; 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); 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) 168 struct mount *mp; 169 const char *path; 170 void *data; 171 size_t *data_len; 172 { 173 struct lwp *l = curlwp; 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); 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); 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 error = VOP_OPEN(devvp, FREAD, FSCRED); 230 if (error) 231 goto fail; 232 error = iso_mountfs(devvp, mp, l, args); 233 if (error) { 234 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 235 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 236 VOP_UNLOCK(devvp, 0); 237 goto fail; 238 } 239 } else { 240 vrele(devvp); 241 if (devvp != imp->im_devvp) 242 return (EINVAL); /* needs translation */ 243 } 244 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 245 mp->mnt_op->vfs_name, mp, l); 246 247 fail: 248 vrele(devvp); 249 return (error); 250 } 251 252 /* 253 * Make a mount point from a volume descriptor 254 */ 255 static int 256 iso_makemp(isomp, bp, ea_len) 257 struct iso_mnt *isomp; 258 struct buf *bp; 259 int *ea_len; 260 { 261 struct iso_primary_descriptor *pri; 262 int logical_block_size; 263 struct iso_directory_record *rootp; 264 265 pri = (struct iso_primary_descriptor *)bp->b_data; 266 267 logical_block_size = isonum_723 (pri->logical_block_size); 268 269 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 270 || (logical_block_size & (logical_block_size - 1)) != 0) 271 return -1; 272 273 rootp = (struct iso_directory_record *)pri->root_directory_record; 274 275 isomp->logical_block_size = logical_block_size; 276 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 277 memcpy(isomp->root, rootp, sizeof(isomp->root)); 278 isomp->root_extent = isonum_733 (rootp->extent); 279 isomp->root_size = isonum_733 (rootp->size); 280 isomp->im_joliet_level = 0; 281 282 isomp->im_bmask = logical_block_size - 1; 283 isomp->im_bshift = 0; 284 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 285 isomp->im_bshift++; 286 287 if (ea_len != NULL) 288 *ea_len = isonum_711(rootp->ext_attr_length); 289 290 return 0; 291 } 292 293 /* 294 * Common code for mount and mountroot 295 */ 296 static int 297 iso_mountfs(devvp, mp, l, argp) 298 struct vnode *devvp; 299 struct mount *mp; 300 struct lwp *l; 301 struct iso_args *argp; 302 { 303 struct iso_mnt *isomp = (struct iso_mnt *)0; 304 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 305 dev_t dev = devvp->v_rdev; 306 int error = EINVAL; 307 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 308 int iso_bsize; 309 int iso_blknum; 310 int joliet_level; 311 struct iso_volume_descriptor *vdp; 312 struct iso_supplementary_descriptor *sup; 313 int sess = 0; 314 int ext_attr_length; 315 struct disklabel label; 316 317 if (!ronly) 318 return EROFS; 319 320 /* Flush out any old buffers remaining from a previous use. */ 321 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 322 return (error); 323 324 /* This is the "logical sector size". The standard says this 325 * should be 2048 or the physical sector size on the device, 326 * whichever is greater. For now, we'll just use a constant. 327 */ 328 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 329 330 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 331 if (!error && 332 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 333 /* XXX more sanity checks? */ 334 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 335 } else { 336 /* fallback to old method */ 337 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 338 if (error) 339 sess = 0; /* never mind */ 340 } 341 #ifdef ISO_DEBUG 342 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 343 #endif 344 345 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 346 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 347 iso_bsize, NOCRED, &bp)) != 0) 348 goto out; 349 350 vdp = (struct iso_volume_descriptor *)bp->b_data; 351 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 352 error = EINVAL; 353 goto out; 354 } 355 356 switch (isonum_711(vdp->type)) { 357 case ISO_VD_PRIMARY: 358 if (pribp == NULL) { 359 pribp = bp; 360 bp = NULL; 361 } 362 break; 363 364 case ISO_VD_SUPPLEMENTARY: 365 if (supbp == NULL) { 366 supbp = bp; 367 bp = NULL; 368 } 369 break; 370 371 default: 372 break; 373 } 374 375 if (isonum_711 (vdp->type) == ISO_VD_END) { 376 brelse(bp, 0); 377 bp = NULL; 378 break; 379 } 380 381 if (bp != NULL) { 382 brelse(bp, 0); 383 bp = NULL; 384 } 385 } 386 387 if (pribp == NULL) { 388 error = EINVAL; 389 goto out; 390 } 391 392 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 393 memset(isomp, 0, sizeof *isomp); 394 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 395 error = EINVAL; 396 goto out; 397 } 398 399 isomp->volume_space_size += sess; 400 401 brelse(pribp, BC_AGE); 402 pribp = NULL; 403 404 mp->mnt_data = isomp; 405 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 406 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 407 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 408 mp->mnt_stat.f_namemax = MAXNAMLEN; 409 mp->mnt_flag |= MNT_LOCAL; 410 mp->mnt_iflag |= IMNT_MPSAFE; 411 mp->mnt_dev_bshift = iso_bsize; 412 mp->mnt_fs_bshift = isomp->im_bshift; 413 isomp->im_mountp = mp; 414 isomp->im_dev = dev; 415 isomp->im_devvp = devvp; 416 417 /* Check the Rock Ridge Extension support */ 418 if (!(argp->flags & ISOFSMNT_NORRIP)) { 419 struct iso_directory_record *rootp; 420 421 if ((error = bread(isomp->im_devvp, 422 (isomp->root_extent + ext_attr_length) << 423 (isomp->im_bshift - DEV_BSHIFT), 424 isomp->logical_block_size, NOCRED, 425 &bp)) != 0) 426 goto out; 427 428 rootp = (struct iso_directory_record *)bp->b_data; 429 430 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 431 argp->flags |= ISOFSMNT_NORRIP; 432 } else { 433 argp->flags &= ~ISOFSMNT_GENS; 434 } 435 436 /* 437 * The contents are valid, 438 * but they will get reread as part of another vnode, so... 439 */ 440 brelse(bp, BC_AGE); 441 bp = NULL; 442 } 443 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 444 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 445 446 if (isomp->im_flags & ISOFSMNT_GENS) 447 isomp->iso_ftype = ISO_FTYPE_9660; 448 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 449 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 450 if (argp->flags & ISOFSMNT_NOCASETRANS) 451 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 452 } else 453 isomp->iso_ftype = ISO_FTYPE_RRIP; 454 455 /* Check the Joliet Extension support */ 456 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 457 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 458 supbp != NULL) { 459 joliet_level = 0; 460 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 461 462 if ((isonum_711(sup->flags) & 1) == 0) { 463 if (memcmp(sup->escape, "%/@", 3) == 0) 464 joliet_level = 1; 465 if (memcmp(sup->escape, "%/C", 3) == 0) 466 joliet_level = 2; 467 if (memcmp(sup->escape, "%/E", 3) == 0) 468 joliet_level = 3; 469 } 470 if (joliet_level != 0) { 471 if (iso_makemp(isomp, supbp, NULL) == -1) { 472 error = EINVAL; 473 goto out; 474 } 475 isomp->im_joliet_level = joliet_level; 476 } 477 } 478 479 if (supbp != NULL) { 480 brelse(supbp, 0); 481 supbp = NULL; 482 } 483 484 devvp->v_specmountpoint = mp; 485 486 return 0; 487 out: 488 if (bp) 489 brelse(bp, 0); 490 if (pribp) 491 brelse(pribp, 0); 492 if (supbp) 493 brelse(supbp, 0); 494 if (isomp) { 495 free(isomp, M_ISOFSMNT); 496 mp->mnt_data = NULL; 497 } 498 return error; 499 } 500 501 /* 502 * Make a filesystem operational. 503 * Nothing to do at the moment. 504 */ 505 /* ARGSUSED */ 506 int 507 cd9660_start(struct mount *mp, int flags) 508 { 509 return 0; 510 } 511 512 /* 513 * unmount system call 514 */ 515 int 516 cd9660_unmount(mp, mntflags) 517 struct mount *mp; 518 int mntflags; 519 { 520 struct iso_mnt *isomp; 521 int error, flags = 0; 522 523 if (mntflags & MNT_FORCE) 524 flags |= FORCECLOSE; 525 if ((error = vflush(mp, NULLVP, flags)) != 0) 526 return (error); 527 528 isomp = VFSTOISOFS(mp); 529 530 if (isomp->im_devvp->v_type != VBAD) 531 isomp->im_devvp->v_specmountpoint = NULL; 532 533 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 534 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 535 vput(isomp->im_devvp); 536 free(isomp, M_ISOFSMNT); 537 mp->mnt_data = NULL; 538 mp->mnt_flag &= ~MNT_LOCAL; 539 return (error); 540 } 541 542 /* 543 * Return root of a filesystem 544 */ 545 int 546 cd9660_root(mp, vpp) 547 struct mount *mp; 548 struct vnode **vpp; 549 { 550 struct iso_mnt *imp = VFSTOISOFS(mp); 551 struct iso_directory_record *dp = 552 (struct iso_directory_record *)imp->root; 553 ino_t ino = isodirino(dp, imp); 554 555 /* 556 * With RRIP we must use the `.' entry of the root directory. 557 * Simply tell vget, that it's a relocated directory. 558 */ 559 return (cd9660_vget_internal(mp, ino, vpp, 560 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 561 } 562 563 /* 564 * Get file system statistics. 565 */ 566 int 567 cd9660_statvfs( 568 struct mount *mp, 569 struct statvfs *sbp) 570 { 571 struct iso_mnt *isomp; 572 573 isomp = VFSTOISOFS(mp); 574 575 sbp->f_bsize = isomp->logical_block_size; 576 sbp->f_frsize = sbp->f_bsize; 577 sbp->f_iosize = sbp->f_bsize; /* XXX */ 578 sbp->f_blocks = isomp->volume_space_size; 579 sbp->f_bfree = 0; /* total free blocks */ 580 sbp->f_bavail = 0; /* blocks free for non superuser */ 581 sbp->f_bresvd = 0; /* total reserved blocks */ 582 sbp->f_files = 0; /* total files */ 583 sbp->f_ffree = 0; /* free file nodes */ 584 sbp->f_favail = 0; /* free file nodes for non superuser */ 585 sbp->f_fresvd = 0; /* reserved file nodes */ 586 copy_statvfs_info(sbp, mp); 587 /* Use the first spare for flags: */ 588 sbp->f_spare[0] = isomp->im_flags; 589 return 0; 590 } 591 592 /* ARGSUSED */ 593 int 594 cd9660_sync( 595 struct mount *mp, 596 int waitfor, 597 kauth_cred_t cred) 598 { 599 return (0); 600 } 601 602 /* 603 * File handle to vnode 604 * 605 * Have to be really careful about stale file handles: 606 * - check that the inode number is in range 607 * - call iget() to get the locked inode 608 * - check for an unallocated inode (i_mode == 0) 609 * - check that the generation number matches 610 */ 611 612 struct ifid { 613 ushort ifid_len; 614 ushort ifid_pad; 615 int ifid_ino; 616 long ifid_start; 617 }; 618 619 /* ARGSUSED */ 620 int 621 cd9660_fhtovp(mp, fhp, vpp) 622 struct mount *mp; 623 struct fid *fhp; 624 struct vnode **vpp; 625 { 626 struct ifid ifh; 627 struct iso_node *ip; 628 struct vnode *nvp; 629 int error; 630 631 if (fhp->fid_len != sizeof(ifh)) 632 return EINVAL; 633 634 memcpy(&ifh, fhp, sizeof(ifh)); 635 #ifdef ISOFS_DBG 636 printf("fhtovp: ino %d, start %ld\n", 637 ifh.ifid_ino, ifh.ifid_start); 638 #endif 639 640 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 641 *vpp = NULLVP; 642 return (error); 643 } 644 ip = VTOI(nvp); 645 if (ip->inode.iso_mode == 0) { 646 vput(nvp); 647 *vpp = NULLVP; 648 return (ESTALE); 649 } 650 *vpp = nvp; 651 return (0); 652 } 653 654 int 655 cd9660_vget(mp, ino, vpp) 656 struct mount *mp; 657 ino_t ino; 658 struct vnode **vpp; 659 { 660 661 /* 662 * XXXX 663 * It would be nice if we didn't always set the `relocated' flag 664 * and force the extra read, but I don't want to think about fixing 665 * that right now. 666 */ 667 return (cd9660_vget_internal(mp, ino, vpp, 668 #if 0 669 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 670 #else 671 0, 672 #endif 673 NULL)); 674 } 675 676 int 677 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 678 struct mount *mp; 679 ino_t ino; 680 struct vnode **vpp; 681 int relocated; 682 struct iso_directory_record *isodir; 683 { 684 struct iso_mnt *imp; 685 struct iso_node *ip; 686 struct buf *bp; 687 struct vnode *vp; 688 dev_t dev; 689 int error; 690 691 imp = VFSTOISOFS(mp); 692 dev = imp->im_dev; 693 694 retry: 695 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP) 696 return (0); 697 698 /* Allocate a new vnode/iso_node. */ 699 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 700 *vpp = NULLVP; 701 return (error); 702 } 703 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 704 705 /* 706 * If someone beat us to it, put back the freshly allocated 707 * vnode/inode pair and retry. 708 */ 709 mutex_enter(&cd9660_hashlock); 710 if (cd9660_ihashget(dev, ino, 0) != NULL) { 711 mutex_exit(&cd9660_hashlock); 712 ungetnewvnode(vp); 713 pool_put(&cd9660_node_pool, ip); 714 goto retry; 715 } 716 717 memset(ip, 0, sizeof(struct iso_node)); 718 vp->v_data = ip; 719 ip->i_vnode = vp; 720 ip->i_dev = dev; 721 ip->i_number = ino; 722 ip->i_mnt = imp; 723 ip->i_devvp = imp->im_devvp; 724 genfs_node_init(vp, &cd9660_genfsops); 725 726 /* 727 * Put it onto its hash chain and lock it so that other requests for 728 * this inode will block if they arrive while we are sleeping waiting 729 * for old data structures to be purged or for the contents of the 730 * disk portion of this inode to be read. 731 */ 732 cd9660_ihashins(ip); 733 mutex_exit(&cd9660_hashlock); 734 735 if (isodir == 0) { 736 int lbn, off; 737 738 lbn = lblkno(imp, ino); 739 if (lbn >= imp->volume_space_size) { 740 vput(vp); 741 printf("fhtovp: lbn exceed volume space %d\n", lbn); 742 return (ESTALE); 743 } 744 745 off = blkoff(imp, ino); 746 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 747 vput(vp); 748 printf("fhtovp: crosses block boundary %d\n", 749 off + ISO_DIRECTORY_RECORD_SIZE); 750 return (ESTALE); 751 } 752 753 error = bread(imp->im_devvp, 754 lbn << (imp->im_bshift - DEV_BSHIFT), 755 imp->logical_block_size, NOCRED, &bp); 756 if (error) { 757 vput(vp); 758 brelse(bp, 0); 759 printf("fhtovp: bread error %d\n",error); 760 return (error); 761 } 762 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 763 764 if (off + isonum_711(isodir->length) > 765 imp->logical_block_size) { 766 vput(vp); 767 if (bp != 0) 768 brelse(bp, 0); 769 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 770 off +isonum_711(isodir->length), off, 771 isonum_711(isodir->length)); 772 return (ESTALE); 773 } 774 775 #if 0 776 if (isonum_733(isodir->extent) + 777 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 778 if (bp != 0) 779 brelse(bp, 0); 780 printf("fhtovp: file start miss %d vs %d\n", 781 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 782 ifhp->ifid_start); 783 return (ESTALE); 784 } 785 #endif 786 } else 787 bp = 0; 788 789 VREF(ip->i_devvp); 790 791 if (relocated) { 792 /* 793 * On relocated directories we must 794 * read the `.' entry out of a dir. 795 */ 796 ip->iso_start = ino >> imp->im_bshift; 797 if (bp != 0) 798 brelse(bp, 0); 799 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 800 vput(vp); 801 return (error); 802 } 803 isodir = (struct iso_directory_record *)bp->b_data; 804 } 805 806 ip->iso_extent = isonum_733(isodir->extent); 807 ip->i_size = isonum_733(isodir->size); 808 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 809 810 /* 811 * Setup time stamp, attribute 812 */ 813 vp->v_type = VNON; 814 switch (imp->iso_ftype) { 815 default: /* ISO_FTYPE_9660 */ 816 { 817 struct buf *bp2; 818 int off; 819 if ((imp->im_flags & ISOFSMNT_EXTATT) 820 && (off = isonum_711(isodir->ext_attr_length))) 821 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 822 NULL, &bp2); 823 else 824 bp2 = NULL; 825 cd9660_defattr(isodir, ip, bp2); 826 cd9660_deftstamp(isodir, ip, bp2); 827 if (bp2) 828 brelse(bp2, 0); 829 break; 830 } 831 case ISO_FTYPE_RRIP: 832 cd9660_rrip_analyze(isodir, ip, imp); 833 break; 834 } 835 836 if (bp != 0) 837 brelse(bp, 0); 838 839 /* 840 * Initialize the associated vnode 841 */ 842 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 843 case VFIFO: 844 vp->v_op = cd9660_fifoop_p; 845 break; 846 case VCHR: 847 case VBLK: 848 /* 849 * if device, look at device number table for translation 850 */ 851 vp->v_op = cd9660_specop_p; 852 spec_node_init(vp, ip->inode.iso_rdev); 853 break; 854 case VLNK: 855 case VNON: 856 case VSOCK: 857 case VDIR: 858 case VBAD: 859 break; 860 case VREG: 861 uvm_vnp_setsize(vp, ip->i_size); 862 break; 863 } 864 865 if (vp->v_type != VREG) 866 uvm_vnp_setsize(vp, 0); 867 868 if (ip->iso_extent == imp->root_extent) 869 vp->v_vflag |= VV_ROOT; 870 871 /* 872 * XXX need generation number? 873 */ 874 875 *vpp = vp; 876 return (0); 877 } 878 879 /* 880 * Vnode pointer to File handle 881 */ 882 /* ARGSUSED */ 883 int 884 cd9660_vptofh(vp, fhp, fh_size) 885 struct vnode *vp; 886 struct fid *fhp; 887 size_t *fh_size; 888 { 889 struct iso_node *ip = VTOI(vp); 890 struct ifid ifh; 891 892 if (*fh_size < sizeof(struct ifid)) { 893 *fh_size = sizeof(struct ifid); 894 return E2BIG; 895 } 896 *fh_size = sizeof(struct ifid); 897 898 memset(&ifh, 0, sizeof(ifh)); 899 ifh.ifid_len = sizeof(struct ifid); 900 ifh.ifid_ino = ip->i_number; 901 ifh.ifid_start = ip->iso_start; 902 memcpy(fhp, &ifh, sizeof(ifh)); 903 904 #ifdef ISOFS_DBG 905 printf("vptofh: ino %d, start %ld\n", 906 ifh.ifid_ino,ifh.ifid_start); 907 #endif 908 return 0; 909 } 910 911 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 912 { 913 914 sysctl_createv(clog, 0, NULL, NULL, 915 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 916 NULL, 0, NULL, 0, 917 CTL_VFS, CTL_EOL); 918 sysctl_createv(clog, 0, NULL, NULL, 919 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 920 SYSCTL_DESCR("ISO-9660 file system"), 921 NULL, 0, NULL, 0, 922 CTL_VFS, 14, CTL_EOL); 923 924 sysctl_createv(clog, 0, NULL, NULL, 925 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 926 CTLTYPE_INT, "utf8_joliet", 927 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 928 NULL, 0, &cd9660_utf8_joliet, 0, 929 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 930 931 } 932
Indexes created Fri Sep 26 20:09:58 GMT 2025