cd9660_vfsops.c revision 1.60
1 /* $NetBSD: cd9660_vfsops.c,v 1.60 2008/05/03 15:57:41 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 1.60 2008/05/03 15:57:41 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/genfs/genfs.h> 54 #include <miscfs/specfs/specdev.h> 55 #include <sys/mount.h> 56 #include <sys/buf.h> 57 #include <sys/file.h> 58 #include <sys/disklabel.h> 59 #include <sys/device.h> 60 #include <sys/ioctl.h> 61 #include <sys/cdio.h> 62 #include <sys/errno.h> 63 #include <sys/malloc.h> 64 #include <sys/pool.h> 65 #include <sys/stat.h> 66 #include <sys/conf.h> 67 #include <sys/dirent.h> 68 #include <sys/kauth.h> 69 #include <sys/module.h> 70 71 #include <fs/cd9660/iso.h> 72 #include <fs/cd9660/cd9660_extern.h> 73 #include <fs/cd9660/iso_rrip.h> 74 #include <fs/cd9660/cd9660_node.h> 75 #include <fs/cd9660/cd9660_mount.h> 76 77 MODULE(MODULE_CLASS_VFS, cd9660, NULL); 78 79 MALLOC_JUSTDEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 80 81 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 82 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 83 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 84 85 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 86 &cd9660_vnodeop_opv_desc, 87 &cd9660_specop_opv_desc, 88 &cd9660_fifoop_opv_desc, 89 NULL, 90 }; 91 92 struct vfsops cd9660_vfsops = { 93 MOUNT_CD9660, 94 sizeof (struct iso_args), 95 cd9660_mount, 96 cd9660_start, 97 cd9660_unmount, 98 cd9660_root, 99 (void *)eopnotsupp, 100 cd9660_statvfs, 101 cd9660_sync, 102 cd9660_vget, 103 cd9660_fhtovp, 104 cd9660_vptofh, 105 cd9660_init, 106 cd9660_reinit, 107 cd9660_done, 108 cd9660_mountroot, 109 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 110 vfs_stdextattrctl, 111 (void *)eopnotsupp, /* vfs_suspendctl */ 112 genfs_renamelock_enter, 113 genfs_renamelock_exit, 114 (void *)eopnotsupp, 115 cd9660_vnodeopv_descs, 116 0, /* refcount */ 117 { NULL, NULL } /* list */ 118 }; 119 120 static const struct genfs_ops cd9660_genfsops = { 121 .gop_size = genfs_size, 122 }; 123 124 /* 125 * Called by vfs_mountroot when iso is going to be mounted as root. 126 * 127 * Name is updated by mount(8) after booting. 128 */ 129 #define ROOTNAME "root_device" 130 131 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 132 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 133 struct lwp *l, struct iso_args *argp); 134 135 static int 136 cd9660_modcmd(modcmd_t cmd, void *arg) 137 { 138 139 switch (cmd) { 140 case MODULE_CMD_INIT: 141 return vfs_attach(&cd9660_vfsops); 142 case MODULE_CMD_FINI: 143 return vfs_detach(&cd9660_vfsops); 144 default: 145 return ENOTTY; 146 } 147 } 148 149 int 150 cd9660_mountroot(void) 151 { 152 struct mount *mp; 153 struct lwp *l = curlwp; 154 int error; 155 struct iso_args args; 156 157 if (device_class(root_device) != DV_DISK) 158 return (ENODEV); 159 160 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 161 != 0) { 162 vrele(rootvp); 163 return (error); 164 } 165 166 args.flags = ISOFSMNT_ROOT; 167 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 168 vfs_unbusy(mp, false, NULL); 169 vfs_destroy(mp, false); 170 return (error); 171 } 172 mutex_enter(&mountlist_lock); 173 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 174 mp->mnt_iflag |= IMNT_ONLIST; 175 mutex_exit(&mountlist_lock); 176 (void)cd9660_statvfs(mp, &mp->mnt_stat); 177 vfs_unbusy(mp, false, NULL); 178 return (0); 179 } 180 181 /* 182 * VFS Operations. 183 * 184 * mount system call 185 */ 186 int 187 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 188 { 189 struct lwp *l = curlwp; 190 struct nameidata nd; 191 struct vnode *devvp; 192 struct iso_args *args = data; 193 int error; 194 struct iso_mnt *imp = VFSTOISOFS(mp); 195 196 if (*data_len < sizeof *args) 197 return EINVAL; 198 199 if (mp->mnt_flag & MNT_GETARGS) { 200 if (imp == NULL) 201 return EIO; 202 args->fspec = NULL; 203 args->flags = imp->im_flags; 204 *data_len = sizeof (*args); 205 return 0; 206 } 207 208 if ((mp->mnt_flag & MNT_RDONLY) == 0) 209 return (EROFS); 210 211 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 212 return EINVAL; 213 214 /* 215 * Not an update, or updating the name: look up the name 216 * and verify that it refers to a sensible block device. 217 */ 218 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 219 if ((error = namei(&nd)) != 0) 220 return (error); 221 devvp = nd.ni_vp; 222 223 if (devvp->v_type != VBLK) { 224 vrele(devvp); 225 return ENOTBLK; 226 } 227 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 228 vrele(devvp); 229 return ENXIO; 230 } 231 /* 232 * If mount by non-root, then verify that user has necessary 233 * permissions on the device. 234 */ 235 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) { 236 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 237 error = VOP_ACCESS(devvp, VREAD, l->l_cred); 238 VOP_UNLOCK(devvp, 0); 239 if (error) { 240 vrele(devvp); 241 return (error); 242 } 243 } 244 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 245 error = VOP_OPEN(devvp, FREAD, FSCRED); 246 if (error) 247 goto fail; 248 error = iso_mountfs(devvp, mp, l, args); 249 if (error) { 250 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 251 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 252 VOP_UNLOCK(devvp, 0); 253 goto fail; 254 } 255 } else { 256 vrele(devvp); 257 if (devvp != imp->im_devvp) 258 return (EINVAL); /* needs translation */ 259 } 260 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 261 mp->mnt_op->vfs_name, mp, l); 262 263 fail: 264 vrele(devvp); 265 return (error); 266 } 267 268 /* 269 * Make a mount point from a volume descriptor 270 */ 271 static int 272 iso_makemp(struct iso_mnt *isomp, struct buf *bp, 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(struct vnode *devvp, struct mount *mp, 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); 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); 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, 0); 387 bp = NULL; 388 break; 389 } 390 391 if (bp != NULL) { 392 brelse(bp, 0); 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 brelse(pribp, BC_AGE); 412 pribp = NULL; 413 414 mp->mnt_data = isomp; 415 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 416 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 417 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 418 mp->mnt_stat.f_namemax = MAXNAMLEN; 419 mp->mnt_flag |= MNT_LOCAL; 420 mp->mnt_iflag |= IMNT_MPSAFE; 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 brelse(bp, BC_AGE); 451 bp = NULL; 452 } 453 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 454 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 455 456 if (isomp->im_flags & ISOFSMNT_GENS) 457 isomp->iso_ftype = ISO_FTYPE_9660; 458 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 459 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 460 if (argp->flags & ISOFSMNT_NOCASETRANS) 461 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 462 } else 463 isomp->iso_ftype = ISO_FTYPE_RRIP; 464 465 /* Check the Joliet Extension support */ 466 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 467 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 468 supbp != NULL) { 469 joliet_level = 0; 470 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 471 472 if ((isonum_711(sup->flags) & 1) == 0) { 473 if (memcmp(sup->escape, "%/@", 3) == 0) 474 joliet_level = 1; 475 if (memcmp(sup->escape, "%/C", 3) == 0) 476 joliet_level = 2; 477 if (memcmp(sup->escape, "%/E", 3) == 0) 478 joliet_level = 3; 479 } 480 if (joliet_level != 0) { 481 if (iso_makemp(isomp, supbp, NULL) == -1) { 482 error = EINVAL; 483 goto out; 484 } 485 isomp->im_joliet_level = joliet_level; 486 } 487 } 488 489 if (supbp != NULL) { 490 brelse(supbp, 0); 491 supbp = NULL; 492 } 493 494 devvp->v_specmountpoint = mp; 495 496 return 0; 497 out: 498 if (bp) 499 brelse(bp, 0); 500 if (pribp) 501 brelse(pribp, 0); 502 if (supbp) 503 brelse(supbp, 0); 504 if (isomp) { 505 free(isomp, M_ISOFSMNT); 506 mp->mnt_data = NULL; 507 } 508 return error; 509 } 510 511 /* 512 * Make a filesystem operational. 513 * Nothing to do at the moment. 514 */ 515 /* ARGSUSED */ 516 int 517 cd9660_start(struct mount *mp, int flags) 518 { 519 return 0; 520 } 521 522 /* 523 * unmount system call 524 */ 525 int 526 cd9660_unmount(struct mount *mp, int mntflags) 527 { 528 struct iso_mnt *isomp; 529 int error, flags = 0; 530 531 if (mntflags & MNT_FORCE) 532 flags |= FORCECLOSE; 533 if ((error = vflush(mp, NULLVP, flags)) != 0) 534 return (error); 535 536 isomp = VFSTOISOFS(mp); 537 538 if (isomp->im_devvp->v_type != VBAD) 539 isomp->im_devvp->v_specmountpoint = NULL; 540 541 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 542 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 543 vput(isomp->im_devvp); 544 free(isomp, M_ISOFSMNT); 545 mp->mnt_data = NULL; 546 mp->mnt_flag &= ~MNT_LOCAL; 547 return (error); 548 } 549 550 /* 551 * Return root of a filesystem 552 */ 553 int 554 cd9660_root(struct mount *mp, struct vnode **vpp) 555 { 556 struct iso_mnt *imp = VFSTOISOFS(mp); 557 struct iso_directory_record *dp = 558 (struct iso_directory_record *)imp->root; 559 ino_t ino = isodirino(dp, imp); 560 561 /* 562 * With RRIP we must use the `.' entry of the root directory. 563 * Simply tell vget, that it's a relocated directory. 564 */ 565 return (cd9660_vget_internal(mp, ino, vpp, 566 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 567 } 568 569 /* 570 * Get file system statistics. 571 */ 572 int 573 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 574 { 575 struct iso_mnt *isomp; 576 577 isomp = VFSTOISOFS(mp); 578 579 sbp->f_bsize = isomp->logical_block_size; 580 sbp->f_frsize = sbp->f_bsize; 581 sbp->f_iosize = sbp->f_bsize; /* XXX */ 582 sbp->f_blocks = isomp->volume_space_size; 583 sbp->f_bfree = 0; /* total free blocks */ 584 sbp->f_bavail = 0; /* blocks free for non superuser */ 585 sbp->f_bresvd = 0; /* total reserved blocks */ 586 sbp->f_files = 0; /* total files */ 587 sbp->f_ffree = 0; /* free file nodes */ 588 sbp->f_favail = 0; /* free file nodes for non superuser */ 589 sbp->f_fresvd = 0; /* reserved file nodes */ 590 copy_statvfs_info(sbp, mp); 591 /* Use the first spare for flags: */ 592 sbp->f_spare[0] = isomp->im_flags; 593 return 0; 594 } 595 596 /* ARGSUSED */ 597 int 598 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 599 { 600 return 0; 601 } 602 603 /* 604 * File handle to vnode 605 * 606 * Have to be really careful about stale file handles: 607 * - check that the inode number is in range 608 * - call iget() to get the locked inode 609 * - check for an unallocated inode (i_mode == 0) 610 * - check that the generation number matches 611 */ 612 613 struct ifid { 614 ushort ifid_len; 615 ushort ifid_pad; 616 int ifid_ino; 617 long ifid_start; 618 }; 619 620 /* ARGSUSED */ 621 int 622 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 623 { 624 struct ifid ifh; 625 struct iso_node *ip; 626 struct vnode *nvp; 627 int error; 628 629 if (fhp->fid_len != sizeof(ifh)) 630 return EINVAL; 631 632 memcpy(&ifh, fhp, sizeof(ifh)); 633 #ifdef ISOFS_DBG 634 printf("fhtovp: ino %d, start %ld\n", 635 ifh.ifid_ino, ifh.ifid_start); 636 #endif 637 638 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 639 *vpp = NULLVP; 640 return (error); 641 } 642 ip = VTOI(nvp); 643 if (ip->inode.iso_mode == 0) { 644 vput(nvp); 645 *vpp = NULLVP; 646 return (ESTALE); 647 } 648 *vpp = nvp; 649 return (0); 650 } 651 652 int 653 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 654 { 655 656 /* 657 * XXXX 658 * It would be nice if we didn't always set the `relocated' flag 659 * and force the extra read, but I don't want to think about fixing 660 * that right now. 661 */ 662 return (cd9660_vget_internal(mp, ino, vpp, 663 #if 0 664 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 665 #else 666 0, 667 #endif 668 NULL)); 669 } 670 671 int 672 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 673 int relocated, struct iso_directory_record *isodir) 674 { 675 struct iso_mnt *imp; 676 struct iso_node *ip; 677 struct buf *bp; 678 struct vnode *vp; 679 dev_t dev; 680 int error; 681 682 imp = VFSTOISOFS(mp); 683 dev = imp->im_dev; 684 685 retry: 686 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP) 687 return (0); 688 689 /* Allocate a new vnode/iso_node. */ 690 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 691 *vpp = NULLVP; 692 return (error); 693 } 694 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 695 696 /* 697 * If someone beat us to it, put back the freshly allocated 698 * vnode/inode pair and retry. 699 */ 700 mutex_enter(&cd9660_hashlock); 701 if (cd9660_ihashget(dev, ino, 0) != NULL) { 702 mutex_exit(&cd9660_hashlock); 703 ungetnewvnode(vp); 704 pool_put(&cd9660_node_pool, ip); 705 goto retry; 706 } 707 708 memset(ip, 0, sizeof(struct iso_node)); 709 vp->v_data = ip; 710 ip->i_vnode = vp; 711 ip->i_dev = dev; 712 ip->i_number = ino; 713 ip->i_mnt = imp; 714 ip->i_devvp = imp->im_devvp; 715 genfs_node_init(vp, &cd9660_genfsops); 716 717 /* 718 * Put it onto its hash chain and lock it so that other requests for 719 * this inode will block if they arrive while we are sleeping waiting 720 * for old data structures to be purged or for the contents of the 721 * disk portion of this inode to be read. 722 */ 723 cd9660_ihashins(ip); 724 mutex_exit(&cd9660_hashlock); 725 726 if (isodir == 0) { 727 int lbn, off; 728 729 lbn = lblkno(imp, ino); 730 if (lbn >= imp->volume_space_size) { 731 vput(vp); 732 printf("fhtovp: lbn exceed volume space %d\n", lbn); 733 return (ESTALE); 734 } 735 736 off = blkoff(imp, ino); 737 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 738 vput(vp); 739 printf("fhtovp: crosses block boundary %d\n", 740 off + ISO_DIRECTORY_RECORD_SIZE); 741 return (ESTALE); 742 } 743 744 error = bread(imp->im_devvp, 745 lbn << (imp->im_bshift - DEV_BSHIFT), 746 imp->logical_block_size, NOCRED, &bp); 747 if (error) { 748 vput(vp); 749 brelse(bp, 0); 750 printf("fhtovp: bread error %d\n",error); 751 return (error); 752 } 753 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 754 755 if (off + isonum_711(isodir->length) > 756 imp->logical_block_size) { 757 vput(vp); 758 if (bp != 0) 759 brelse(bp, 0); 760 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 761 off +isonum_711(isodir->length), off, 762 isonum_711(isodir->length)); 763 return (ESTALE); 764 } 765 766 #if 0 767 if (isonum_733(isodir->extent) + 768 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 769 if (bp != 0) 770 brelse(bp, 0); 771 printf("fhtovp: file start miss %d vs %d\n", 772 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 773 ifhp->ifid_start); 774 return (ESTALE); 775 } 776 #endif 777 } else 778 bp = 0; 779 780 VREF(ip->i_devvp); 781 782 if (relocated) { 783 /* 784 * On relocated directories we must 785 * read the `.' entry out of a dir. 786 */ 787 ip->iso_start = ino >> imp->im_bshift; 788 if (bp != 0) 789 brelse(bp, 0); 790 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 791 vput(vp); 792 return (error); 793 } 794 isodir = (struct iso_directory_record *)bp->b_data; 795 } 796 797 ip->iso_extent = isonum_733(isodir->extent); 798 ip->i_size = isonum_733(isodir->size); 799 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 800 801 /* 802 * Setup time stamp, attribute 803 */ 804 vp->v_type = VNON; 805 switch (imp->iso_ftype) { 806 default: /* ISO_FTYPE_9660 */ 807 { 808 struct buf *bp2; 809 int off; 810 if ((imp->im_flags & ISOFSMNT_EXTATT) 811 && (off = isonum_711(isodir->ext_attr_length))) 812 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 813 NULL, &bp2); 814 else 815 bp2 = NULL; 816 cd9660_defattr(isodir, ip, bp2); 817 cd9660_deftstamp(isodir, ip, bp2); 818 if (bp2) 819 brelse(bp2, 0); 820 break; 821 } 822 case ISO_FTYPE_RRIP: 823 cd9660_rrip_analyze(isodir, ip, imp); 824 break; 825 } 826 827 if (bp != 0) 828 brelse(bp, 0); 829 830 /* 831 * Initialize the associated vnode 832 */ 833 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 834 case VFIFO: 835 vp->v_op = cd9660_fifoop_p; 836 break; 837 case VCHR: 838 case VBLK: 839 /* 840 * if device, look at device number table for translation 841 */ 842 vp->v_op = cd9660_specop_p; 843 spec_node_init(vp, ip->inode.iso_rdev); 844 break; 845 case VLNK: 846 case VNON: 847 case VSOCK: 848 case VDIR: 849 case VBAD: 850 break; 851 case VREG: 852 uvm_vnp_setsize(vp, ip->i_size); 853 break; 854 } 855 856 if (vp->v_type != VREG) 857 uvm_vnp_setsize(vp, 0); 858 859 if (ip->iso_extent == imp->root_extent) 860 vp->v_vflag |= VV_ROOT; 861 862 /* 863 * XXX need generation number? 864 */ 865 866 *vpp = vp; 867 return (0); 868 } 869 870 /* 871 * Vnode pointer to File handle 872 */ 873 /* ARGSUSED */ 874 int 875 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 876 { 877 struct iso_node *ip = VTOI(vp); 878 struct ifid ifh; 879 880 if (*fh_size < sizeof(struct ifid)) { 881 *fh_size = sizeof(struct ifid); 882 return E2BIG; 883 } 884 *fh_size = sizeof(struct ifid); 885 886 memset(&ifh, 0, sizeof(ifh)); 887 ifh.ifid_len = sizeof(struct ifid); 888 ifh.ifid_ino = ip->i_number; 889 ifh.ifid_start = ip->iso_start; 890 memcpy(fhp, &ifh, sizeof(ifh)); 891 892 #ifdef ISOFS_DBG 893 printf("vptofh: ino %d, start %ld\n", 894 ifh.ifid_ino,ifh.ifid_start); 895 #endif 896 return 0; 897 } 898 899 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 900 { 901 902 sysctl_createv(clog, 0, NULL, NULL, 903 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 904 NULL, 0, NULL, 0, 905 CTL_VFS, CTL_EOL); 906 sysctl_createv(clog, 0, NULL, NULL, 907 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 908 SYSCTL_DESCR("ISO-9660 file system"), 909 NULL, 0, NULL, 0, 910 CTL_VFS, 14, CTL_EOL); 911 912 sysctl_createv(clog, 0, NULL, NULL, 913 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 914 CTLTYPE_INT, "utf8_joliet", 915 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 916 NULL, 0, &cd9660_utf8_joliet, 0, 917 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 918 919 } 920
Indexes created Sun Sep 28 07:09:56 GMT 2025