cd9660_vfsops.c revision 1.62
1 /* $NetBSD: cd9660_vfsops.c,v 1.62 2008/05/16 09:21:59 hannken 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 1.62 2008/05/16 09:21:59 hannken 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); 170 return (error); 171 } 172 mutex_enter(&mountlist_lock); 173 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 174 mutex_exit(&mountlist_lock); 175 (void)cd9660_statvfs(mp, &mp->mnt_stat); 176 vfs_unbusy(mp, false, NULL); 177 return (0); 178 } 179 180 /* 181 * VFS Operations. 182 * 183 * mount system call 184 */ 185 int 186 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 187 { 188 struct lwp *l = curlwp; 189 struct nameidata nd; 190 struct vnode *devvp; 191 struct iso_args *args = data; 192 int error; 193 struct iso_mnt *imp = VFSTOISOFS(mp); 194 195 if (*data_len < sizeof *args) 196 return EINVAL; 197 198 if (mp->mnt_flag & MNT_GETARGS) { 199 if (imp == NULL) 200 return EIO; 201 args->fspec = NULL; 202 args->flags = imp->im_flags; 203 *data_len = sizeof (*args); 204 return 0; 205 } 206 207 if ((mp->mnt_flag & MNT_RDONLY) == 0) 208 return (EROFS); 209 210 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 211 return EINVAL; 212 213 /* 214 * Not an update, or updating the name: look up the name 215 * and verify that it refers to a sensible block device. 216 */ 217 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 218 if ((error = namei(&nd)) != 0) 219 return (error); 220 devvp = nd.ni_vp; 221 222 if (devvp->v_type != VBLK) { 223 vrele(devvp); 224 return ENOTBLK; 225 } 226 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 227 vrele(devvp); 228 return ENXIO; 229 } 230 /* 231 * If mount by non-root, then verify that user has necessary 232 * permissions on the device. 233 */ 234 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) { 235 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 236 error = VOP_ACCESS(devvp, VREAD, l->l_cred); 237 VOP_UNLOCK(devvp, 0); 238 if (error) { 239 vrele(devvp); 240 return (error); 241 } 242 } 243 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 244 error = VOP_OPEN(devvp, FREAD, FSCRED); 245 if (error) 246 goto fail; 247 error = iso_mountfs(devvp, mp, l, args); 248 if (error) { 249 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 250 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 251 VOP_UNLOCK(devvp, 0); 252 goto fail; 253 } 254 } else { 255 vrele(devvp); 256 if (devvp != imp->im_devvp) 257 return (EINVAL); /* needs translation */ 258 } 259 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 260 mp->mnt_op->vfs_name, mp, l); 261 262 fail: 263 vrele(devvp); 264 return (error); 265 } 266 267 /* 268 * Make a mount point from a volume descriptor 269 */ 270 static int 271 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len) 272 { 273 struct iso_primary_descriptor *pri; 274 int logical_block_size; 275 struct iso_directory_record *rootp; 276 277 pri = (struct iso_primary_descriptor *)bp->b_data; 278 279 logical_block_size = isonum_723 (pri->logical_block_size); 280 281 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 282 || (logical_block_size & (logical_block_size - 1)) != 0) 283 return -1; 284 285 rootp = (struct iso_directory_record *)pri->root_directory_record; 286 287 isomp->logical_block_size = logical_block_size; 288 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 289 memcpy(isomp->root, rootp, sizeof(isomp->root)); 290 isomp->root_extent = isonum_733 (rootp->extent); 291 isomp->root_size = isonum_733 (rootp->size); 292 isomp->im_joliet_level = 0; 293 294 isomp->im_bmask = logical_block_size - 1; 295 isomp->im_bshift = 0; 296 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 297 isomp->im_bshift++; 298 299 if (ea_len != NULL) 300 *ea_len = isonum_711(rootp->ext_attr_length); 301 302 return 0; 303 } 304 305 /* 306 * Common code for mount and mountroot 307 */ 308 static int 309 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, 310 struct iso_args *argp) 311 { 312 struct iso_mnt *isomp = (struct iso_mnt *)0; 313 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 314 dev_t dev = devvp->v_rdev; 315 int error = EINVAL; 316 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 317 int iso_bsize; 318 int iso_blknum; 319 int joliet_level; 320 struct iso_volume_descriptor *vdp; 321 struct iso_supplementary_descriptor *sup; 322 int sess = 0; 323 int ext_attr_length; 324 struct disklabel label; 325 326 if (!ronly) 327 return EROFS; 328 329 /* Flush out any old buffers remaining from a previous use. */ 330 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 331 return (error); 332 333 /* This is the "logical sector size". The standard says this 334 * should be 2048 or the physical sector size on the device, 335 * whichever is greater. For now, we'll just use a constant. 336 */ 337 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 338 339 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 340 if (!error && 341 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 342 /* XXX more sanity checks? */ 343 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 344 } else { 345 /* fallback to old method */ 346 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 347 if (error) 348 sess = 0; /* never mind */ 349 } 350 #ifdef ISO_DEBUG 351 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 352 #endif 353 354 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 355 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 356 iso_bsize, NOCRED, 0, &bp)) != 0) 357 goto out; 358 359 vdp = (struct iso_volume_descriptor *)bp->b_data; 360 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 361 error = EINVAL; 362 goto out; 363 } 364 365 switch (isonum_711(vdp->type)) { 366 case ISO_VD_PRIMARY: 367 if (pribp == NULL) { 368 pribp = bp; 369 bp = NULL; 370 } 371 break; 372 373 case ISO_VD_SUPPLEMENTARY: 374 if (supbp == NULL) { 375 supbp = bp; 376 bp = NULL; 377 } 378 break; 379 380 default: 381 break; 382 } 383 384 if (isonum_711 (vdp->type) == ISO_VD_END) { 385 brelse(bp, 0); 386 bp = NULL; 387 break; 388 } 389 390 if (bp != NULL) { 391 brelse(bp, 0); 392 bp = NULL; 393 } 394 } 395 396 if (pribp == NULL) { 397 error = EINVAL; 398 goto out; 399 } 400 401 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 402 memset(isomp, 0, sizeof *isomp); 403 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 404 error = EINVAL; 405 goto out; 406 } 407 408 isomp->volume_space_size += sess; 409 410 brelse(pribp, BC_AGE); 411 pribp = NULL; 412 413 mp->mnt_data = isomp; 414 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 415 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 416 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 417 mp->mnt_stat.f_namemax = MAXNAMLEN; 418 mp->mnt_flag |= MNT_LOCAL; 419 mp->mnt_iflag |= IMNT_MPSAFE; 420 mp->mnt_dev_bshift = iso_bsize; 421 mp->mnt_fs_bshift = isomp->im_bshift; 422 isomp->im_mountp = mp; 423 isomp->im_dev = dev; 424 isomp->im_devvp = devvp; 425 426 /* Check the Rock Ridge Extension support */ 427 if (!(argp->flags & ISOFSMNT_NORRIP)) { 428 struct iso_directory_record *rootp; 429 430 if ((error = bread(isomp->im_devvp, 431 (isomp->root_extent + ext_attr_length) << 432 (isomp->im_bshift - DEV_BSHIFT), 433 isomp->logical_block_size, NOCRED, 434 0, &bp)) != 0) 435 goto out; 436 437 rootp = (struct iso_directory_record *)bp->b_data; 438 439 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 440 argp->flags |= ISOFSMNT_NORRIP; 441 } else { 442 argp->flags &= ~ISOFSMNT_GENS; 443 } 444 445 /* 446 * The contents are valid, 447 * but they will get reread as part of another vnode, so... 448 */ 449 brelse(bp, BC_AGE); 450 bp = NULL; 451 } 452 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 453 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 454 455 if (isomp->im_flags & ISOFSMNT_GENS) 456 isomp->iso_ftype = ISO_FTYPE_9660; 457 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 458 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 459 if (argp->flags & ISOFSMNT_NOCASETRANS) 460 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 461 } else 462 isomp->iso_ftype = ISO_FTYPE_RRIP; 463 464 /* Check the Joliet Extension support */ 465 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 466 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 467 supbp != NULL) { 468 joliet_level = 0; 469 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 470 471 if ((isonum_711(sup->flags) & 1) == 0) { 472 if (memcmp(sup->escape, "%/@", 3) == 0) 473 joliet_level = 1; 474 if (memcmp(sup->escape, "%/C", 3) == 0) 475 joliet_level = 2; 476 if (memcmp(sup->escape, "%/E", 3) == 0) 477 joliet_level = 3; 478 } 479 if (joliet_level != 0) { 480 if (iso_makemp(isomp, supbp, NULL) == -1) { 481 error = EINVAL; 482 goto out; 483 } 484 isomp->im_joliet_level = joliet_level; 485 } 486 } 487 488 if (supbp != NULL) { 489 brelse(supbp, 0); 490 supbp = NULL; 491 } 492 493 devvp->v_specmountpoint = mp; 494 495 return 0; 496 out: 497 if (bp) 498 brelse(bp, 0); 499 if (pribp) 500 brelse(pribp, 0); 501 if (supbp) 502 brelse(supbp, 0); 503 if (isomp) { 504 free(isomp, M_ISOFSMNT); 505 mp->mnt_data = NULL; 506 } 507 return error; 508 } 509 510 /* 511 * Make a filesystem operational. 512 * Nothing to do at the moment. 513 */ 514 /* ARGSUSED */ 515 int 516 cd9660_start(struct mount *mp, int flags) 517 { 518 return 0; 519 } 520 521 /* 522 * unmount system call 523 */ 524 int 525 cd9660_unmount(struct mount *mp, int mntflags) 526 { 527 struct iso_mnt *isomp; 528 int error, flags = 0; 529 530 if (mntflags & MNT_FORCE) 531 flags |= FORCECLOSE; 532 if ((error = vflush(mp, NULLVP, flags)) != 0) 533 return (error); 534 535 isomp = VFSTOISOFS(mp); 536 537 if (isomp->im_devvp->v_type != VBAD) 538 isomp->im_devvp->v_specmountpoint = NULL; 539 540 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 541 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 542 vput(isomp->im_devvp); 543 free(isomp, M_ISOFSMNT); 544 mp->mnt_data = NULL; 545 mp->mnt_flag &= ~MNT_LOCAL; 546 return (error); 547 } 548 549 /* 550 * Return root of a filesystem 551 */ 552 int 553 cd9660_root(struct mount *mp, struct vnode **vpp) 554 { 555 struct iso_mnt *imp = VFSTOISOFS(mp); 556 struct iso_directory_record *dp = 557 (struct iso_directory_record *)imp->root; 558 ino_t ino = isodirino(dp, imp); 559 560 /* 561 * With RRIP we must use the `.' entry of the root directory. 562 * Simply tell vget, that it's a relocated directory. 563 */ 564 return (cd9660_vget_internal(mp, ino, vpp, 565 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 566 } 567 568 /* 569 * Get file system statistics. 570 */ 571 int 572 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 573 { 574 struct iso_mnt *isomp; 575 576 isomp = VFSTOISOFS(mp); 577 578 sbp->f_bsize = isomp->logical_block_size; 579 sbp->f_frsize = sbp->f_bsize; 580 sbp->f_iosize = sbp->f_bsize; /* XXX */ 581 sbp->f_blocks = isomp->volume_space_size; 582 sbp->f_bfree = 0; /* total free blocks */ 583 sbp->f_bavail = 0; /* blocks free for non superuser */ 584 sbp->f_bresvd = 0; /* total reserved blocks */ 585 sbp->f_files = 0; /* total files */ 586 sbp->f_ffree = 0; /* free file nodes */ 587 sbp->f_favail = 0; /* free file nodes for non superuser */ 588 sbp->f_fresvd = 0; /* reserved file nodes */ 589 copy_statvfs_info(sbp, mp); 590 /* Use the first spare for flags: */ 591 sbp->f_spare[0] = isomp->im_flags; 592 return 0; 593 } 594 595 /* ARGSUSED */ 596 int 597 cd9660_sync(struct mount *mp, int waitfor, 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(struct mount *mp, struct fid *fhp, struct vnode **vpp) 622 { 623 struct ifid ifh; 624 struct iso_node *ip; 625 struct vnode *nvp; 626 int error; 627 628 if (fhp->fid_len != sizeof(ifh)) 629 return EINVAL; 630 631 memcpy(&ifh, fhp, sizeof(ifh)); 632 #ifdef ISOFS_DBG 633 printf("fhtovp: ino %d, start %ld\n", 634 ifh.ifid_ino, ifh.ifid_start); 635 #endif 636 637 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 638 *vpp = NULLVP; 639 return (error); 640 } 641 ip = VTOI(nvp); 642 if (ip->inode.iso_mode == 0) { 643 vput(nvp); 644 *vpp = NULLVP; 645 return (ESTALE); 646 } 647 *vpp = nvp; 648 return (0); 649 } 650 651 int 652 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 653 { 654 655 /* 656 * XXXX 657 * It would be nice if we didn't always set the `relocated' flag 658 * and force the extra read, but I don't want to think about fixing 659 * that right now. 660 */ 661 return (cd9660_vget_internal(mp, ino, vpp, 662 #if 0 663 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 664 #else 665 0, 666 #endif 667 NULL)); 668 } 669 670 int 671 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 672 int relocated, struct iso_directory_record *isodir) 673 { 674 struct iso_mnt *imp; 675 struct iso_node *ip; 676 struct buf *bp; 677 struct vnode *vp; 678 dev_t dev; 679 int error; 680 681 imp = VFSTOISOFS(mp); 682 dev = imp->im_dev; 683 684 retry: 685 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP) 686 return (0); 687 688 /* Allocate a new vnode/iso_node. */ 689 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 690 *vpp = NULLVP; 691 return (error); 692 } 693 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 694 695 /* 696 * If someone beat us to it, put back the freshly allocated 697 * vnode/inode pair and retry. 698 */ 699 mutex_enter(&cd9660_hashlock); 700 if (cd9660_ihashget(dev, ino, 0) != NULL) { 701 mutex_exit(&cd9660_hashlock); 702 ungetnewvnode(vp); 703 pool_put(&cd9660_node_pool, ip); 704 goto retry; 705 } 706 707 memset(ip, 0, sizeof(struct iso_node)); 708 vp->v_data = ip; 709 ip->i_vnode = vp; 710 ip->i_dev = dev; 711 ip->i_number = ino; 712 ip->i_mnt = imp; 713 ip->i_devvp = imp->im_devvp; 714 genfs_node_init(vp, &cd9660_genfsops); 715 716 /* 717 * Put it onto its hash chain and lock it so that other requests for 718 * this inode will block if they arrive while we are sleeping waiting 719 * for old data structures to be purged or for the contents of the 720 * disk portion of this inode to be read. 721 */ 722 cd9660_ihashins(ip); 723 mutex_exit(&cd9660_hashlock); 724 725 if (isodir == 0) { 726 int lbn, off; 727 728 lbn = lblkno(imp, ino); 729 if (lbn >= imp->volume_space_size) { 730 vput(vp); 731 printf("fhtovp: lbn exceed volume space %d\n", lbn); 732 return (ESTALE); 733 } 734 735 off = blkoff(imp, ino); 736 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 737 vput(vp); 738 printf("fhtovp: crosses block boundary %d\n", 739 off + ISO_DIRECTORY_RECORD_SIZE); 740 return (ESTALE); 741 } 742 743 error = bread(imp->im_devvp, 744 lbn << (imp->im_bshift - DEV_BSHIFT), 745 imp->logical_block_size, NOCRED, 0, &bp); 746 if (error) { 747 vput(vp); 748 brelse(bp, 0); 749 printf("fhtovp: bread error %d\n",error); 750 return (error); 751 } 752 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 753 754 if (off + isonum_711(isodir->length) > 755 imp->logical_block_size) { 756 vput(vp); 757 if (bp != 0) 758 brelse(bp, 0); 759 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 760 off +isonum_711(isodir->length), off, 761 isonum_711(isodir->length)); 762 return (ESTALE); 763 } 764 765 #if 0 766 if (isonum_733(isodir->extent) + 767 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 768 if (bp != 0) 769 brelse(bp, 0); 770 printf("fhtovp: file start miss %d vs %d\n", 771 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 772 ifhp->ifid_start); 773 return (ESTALE); 774 } 775 #endif 776 } else 777 bp = 0; 778 779 VREF(ip->i_devvp); 780 781 if (relocated) { 782 /* 783 * On relocated directories we must 784 * read the `.' entry out of a dir. 785 */ 786 ip->iso_start = ino >> imp->im_bshift; 787 if (bp != 0) 788 brelse(bp, 0); 789 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 790 vput(vp); 791 return (error); 792 } 793 isodir = (struct iso_directory_record *)bp->b_data; 794 } 795 796 ip->iso_extent = isonum_733(isodir->extent); 797 ip->i_size = isonum_733(isodir->size); 798 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 799 800 /* 801 * Setup time stamp, attribute 802 */ 803 vp->v_type = VNON; 804 switch (imp->iso_ftype) { 805 default: /* ISO_FTYPE_9660 */ 806 { 807 struct buf *bp2; 808 int off; 809 if ((imp->im_flags & ISOFSMNT_EXTATT) 810 && (off = isonum_711(isodir->ext_attr_length))) 811 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 812 NULL, &bp2); 813 else 814 bp2 = NULL; 815 cd9660_defattr(isodir, ip, bp2); 816 cd9660_deftstamp(isodir, ip, bp2); 817 if (bp2) 818 brelse(bp2, 0); 819 break; 820 } 821 case ISO_FTYPE_RRIP: 822 cd9660_rrip_analyze(isodir, ip, imp); 823 break; 824 } 825 826 if (bp != 0) 827 brelse(bp, 0); 828 829 /* 830 * Initialize the associated vnode 831 */ 832 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 833 case VFIFO: 834 vp->v_op = cd9660_fifoop_p; 835 break; 836 case VCHR: 837 case VBLK: 838 /* 839 * if device, look at device number table for translation 840 */ 841 vp->v_op = cd9660_specop_p; 842 spec_node_init(vp, ip->inode.iso_rdev); 843 break; 844 case VLNK: 845 case VNON: 846 case VSOCK: 847 case VDIR: 848 case VBAD: 849 break; 850 case VREG: 851 uvm_vnp_setsize(vp, ip->i_size); 852 break; 853 } 854 855 if (vp->v_type != VREG) 856 uvm_vnp_setsize(vp, 0); 857 858 if (ip->iso_extent == imp->root_extent) 859 vp->v_vflag |= VV_ROOT; 860 861 /* 862 * XXX need generation number? 863 */ 864 865 *vpp = vp; 866 return (0); 867 } 868 869 /* 870 * Vnode pointer to File handle 871 */ 872 /* ARGSUSED */ 873 int 874 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 875 { 876 struct iso_node *ip = VTOI(vp); 877 struct ifid ifh; 878 879 if (*fh_size < sizeof(struct ifid)) { 880 *fh_size = sizeof(struct ifid); 881 return E2BIG; 882 } 883 *fh_size = sizeof(struct ifid); 884 885 memset(&ifh, 0, sizeof(ifh)); 886 ifh.ifid_len = sizeof(struct ifid); 887 ifh.ifid_ino = ip->i_number; 888 ifh.ifid_start = ip->iso_start; 889 memcpy(fhp, &ifh, sizeof(ifh)); 890 891 #ifdef ISOFS_DBG 892 printf("vptofh: ino %d, start %ld\n", 893 ifh.ifid_ino,ifh.ifid_start); 894 #endif 895 return 0; 896 } 897 898 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 899 { 900 901 sysctl_createv(clog, 0, NULL, NULL, 902 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 903 NULL, 0, NULL, 0, 904 CTL_VFS, CTL_EOL); 905 sysctl_createv(clog, 0, NULL, NULL, 906 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 907 SYSCTL_DESCR("ISO-9660 file system"), 908 NULL, 0, NULL, 0, 909 CTL_VFS, 14, CTL_EOL); 910 911 sysctl_createv(clog, 0, NULL, NULL, 912 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 913 CTLTYPE_INT, "utf8_joliet", 914 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 915 NULL, 0, &cd9660_utf8_joliet, 0, 916 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 917 918 } 919
Indexes created Thu Sep 25 08:09:54 GMT 2025