cd9660_vfsops.c revision 1.59
1 /* $NetBSD: cd9660_vfsops.c,v 1.59 2008/04/30 12:49:16 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 1.59 2008/04/30 12:49:16 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 70 #include <fs/cd9660/iso.h> 71 #include <fs/cd9660/cd9660_extern.h> 72 #include <fs/cd9660/iso_rrip.h> 73 #include <fs/cd9660/cd9660_node.h> 74 #include <fs/cd9660/cd9660_mount.h> 75 76 MALLOC_JUSTDEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 77 78 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 79 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 80 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 81 82 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 83 &cd9660_vnodeop_opv_desc, 84 &cd9660_specop_opv_desc, 85 &cd9660_fifoop_opv_desc, 86 NULL, 87 }; 88 89 struct vfsops cd9660_vfsops = { 90 MOUNT_CD9660, 91 sizeof (struct iso_args), 92 cd9660_mount, 93 cd9660_start, 94 cd9660_unmount, 95 cd9660_root, 96 (void *)eopnotsupp, 97 cd9660_statvfs, 98 cd9660_sync, 99 cd9660_vget, 100 cd9660_fhtovp, 101 cd9660_vptofh, 102 cd9660_init, 103 cd9660_reinit, 104 cd9660_done, 105 cd9660_mountroot, 106 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 107 vfs_stdextattrctl, 108 (void *)eopnotsupp, /* vfs_suspendctl */ 109 genfs_renamelock_enter, 110 genfs_renamelock_exit, 111 (void *)eopnotsupp, 112 cd9660_vnodeopv_descs, 113 0, /* refcount */ 114 { NULL, NULL } /* list */ 115 }; 116 VFS_ATTACH(cd9660_vfsops); 117 118 static const struct genfs_ops cd9660_genfsops = { 119 .gop_size = genfs_size, 120 }; 121 122 /* 123 * Called by vfs_mountroot when iso is going to be mounted as root. 124 * 125 * Name is updated by mount(8) after booting. 126 */ 127 #define ROOTNAME "root_device" 128 129 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 130 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 131 struct lwp *l, struct iso_args *argp); 132 133 int 134 cd9660_mountroot(void) 135 { 136 struct mount *mp; 137 struct lwp *l = curlwp; 138 int error; 139 struct iso_args args; 140 141 if (device_class(root_device) != DV_DISK) 142 return (ENODEV); 143 144 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 145 != 0) { 146 vrele(rootvp); 147 return (error); 148 } 149 150 args.flags = ISOFSMNT_ROOT; 151 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 152 vfs_unbusy(mp, false, NULL); 153 vfs_destroy(mp, false); 154 return (error); 155 } 156 mutex_enter(&mountlist_lock); 157 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 158 mp->mnt_iflag |= IMNT_ONLIST; 159 mutex_exit(&mountlist_lock); 160 (void)cd9660_statvfs(mp, &mp->mnt_stat); 161 vfs_unbusy(mp, false, NULL); 162 return (0); 163 } 164 165 /* 166 * VFS Operations. 167 * 168 * mount system call 169 */ 170 int 171 cd9660_mount(struct mount *mp, const char *path, void *data, 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(struct iso_mnt *isomp, struct buf *bp, int *ea_len) 257 { 258 struct iso_primary_descriptor *pri; 259 int logical_block_size; 260 struct iso_directory_record *rootp; 261 262 pri = (struct iso_primary_descriptor *)bp->b_data; 263 264 logical_block_size = isonum_723 (pri->logical_block_size); 265 266 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 267 || (logical_block_size & (logical_block_size - 1)) != 0) 268 return -1; 269 270 rootp = (struct iso_directory_record *)pri->root_directory_record; 271 272 isomp->logical_block_size = logical_block_size; 273 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 274 memcpy(isomp->root, rootp, sizeof(isomp->root)); 275 isomp->root_extent = isonum_733 (rootp->extent); 276 isomp->root_size = isonum_733 (rootp->size); 277 isomp->im_joliet_level = 0; 278 279 isomp->im_bmask = logical_block_size - 1; 280 isomp->im_bshift = 0; 281 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 282 isomp->im_bshift++; 283 284 if (ea_len != NULL) 285 *ea_len = isonum_711(rootp->ext_attr_length); 286 287 return 0; 288 } 289 290 /* 291 * Common code for mount and mountroot 292 */ 293 static int 294 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, 295 struct iso_args *argp) 296 { 297 struct iso_mnt *isomp = (struct iso_mnt *)0; 298 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 299 dev_t dev = devvp->v_rdev; 300 int error = EINVAL; 301 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 302 int iso_bsize; 303 int iso_blknum; 304 int joliet_level; 305 struct iso_volume_descriptor *vdp; 306 struct iso_supplementary_descriptor *sup; 307 int sess = 0; 308 int ext_attr_length; 309 struct disklabel label; 310 311 if (!ronly) 312 return EROFS; 313 314 /* Flush out any old buffers remaining from a previous use. */ 315 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 316 return (error); 317 318 /* This is the "logical sector size". The standard says this 319 * should be 2048 or the physical sector size on the device, 320 * whichever is greater. For now, we'll just use a constant. 321 */ 322 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 323 324 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 325 if (!error && 326 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 327 /* XXX more sanity checks? */ 328 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 329 } else { 330 /* fallback to old method */ 331 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 332 if (error) 333 sess = 0; /* never mind */ 334 } 335 #ifdef ISO_DEBUG 336 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 337 #endif 338 339 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 340 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 341 iso_bsize, NOCRED, &bp)) != 0) 342 goto out; 343 344 vdp = (struct iso_volume_descriptor *)bp->b_data; 345 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 346 error = EINVAL; 347 goto out; 348 } 349 350 switch (isonum_711(vdp->type)) { 351 case ISO_VD_PRIMARY: 352 if (pribp == NULL) { 353 pribp = bp; 354 bp = NULL; 355 } 356 break; 357 358 case ISO_VD_SUPPLEMENTARY: 359 if (supbp == NULL) { 360 supbp = bp; 361 bp = NULL; 362 } 363 break; 364 365 default: 366 break; 367 } 368 369 if (isonum_711 (vdp->type) == ISO_VD_END) { 370 brelse(bp, 0); 371 bp = NULL; 372 break; 373 } 374 375 if (bp != NULL) { 376 brelse(bp, 0); 377 bp = NULL; 378 } 379 } 380 381 if (pribp == NULL) { 382 error = EINVAL; 383 goto out; 384 } 385 386 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 387 memset(isomp, 0, sizeof *isomp); 388 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 389 error = EINVAL; 390 goto out; 391 } 392 393 isomp->volume_space_size += sess; 394 395 brelse(pribp, BC_AGE); 396 pribp = NULL; 397 398 mp->mnt_data = isomp; 399 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 400 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 401 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 402 mp->mnt_stat.f_namemax = MAXNAMLEN; 403 mp->mnt_flag |= MNT_LOCAL; 404 mp->mnt_iflag |= IMNT_MPSAFE; 405 mp->mnt_dev_bshift = iso_bsize; 406 mp->mnt_fs_bshift = isomp->im_bshift; 407 isomp->im_mountp = mp; 408 isomp->im_dev = dev; 409 isomp->im_devvp = devvp; 410 411 /* Check the Rock Ridge Extension support */ 412 if (!(argp->flags & ISOFSMNT_NORRIP)) { 413 struct iso_directory_record *rootp; 414 415 if ((error = bread(isomp->im_devvp, 416 (isomp->root_extent + ext_attr_length) << 417 (isomp->im_bshift - DEV_BSHIFT), 418 isomp->logical_block_size, NOCRED, 419 &bp)) != 0) 420 goto out; 421 422 rootp = (struct iso_directory_record *)bp->b_data; 423 424 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 425 argp->flags |= ISOFSMNT_NORRIP; 426 } else { 427 argp->flags &= ~ISOFSMNT_GENS; 428 } 429 430 /* 431 * The contents are valid, 432 * but they will get reread as part of another vnode, so... 433 */ 434 brelse(bp, BC_AGE); 435 bp = NULL; 436 } 437 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 438 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 439 440 if (isomp->im_flags & ISOFSMNT_GENS) 441 isomp->iso_ftype = ISO_FTYPE_9660; 442 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 443 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 444 if (argp->flags & ISOFSMNT_NOCASETRANS) 445 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 446 } else 447 isomp->iso_ftype = ISO_FTYPE_RRIP; 448 449 /* Check the Joliet Extension support */ 450 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 451 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 452 supbp != NULL) { 453 joliet_level = 0; 454 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 455 456 if ((isonum_711(sup->flags) & 1) == 0) { 457 if (memcmp(sup->escape, "%/@", 3) == 0) 458 joliet_level = 1; 459 if (memcmp(sup->escape, "%/C", 3) == 0) 460 joliet_level = 2; 461 if (memcmp(sup->escape, "%/E", 3) == 0) 462 joliet_level = 3; 463 } 464 if (joliet_level != 0) { 465 if (iso_makemp(isomp, supbp, NULL) == -1) { 466 error = EINVAL; 467 goto out; 468 } 469 isomp->im_joliet_level = joliet_level; 470 } 471 } 472 473 if (supbp != NULL) { 474 brelse(supbp, 0); 475 supbp = NULL; 476 } 477 478 devvp->v_specmountpoint = mp; 479 480 return 0; 481 out: 482 if (bp) 483 brelse(bp, 0); 484 if (pribp) 485 brelse(pribp, 0); 486 if (supbp) 487 brelse(supbp, 0); 488 if (isomp) { 489 free(isomp, M_ISOFSMNT); 490 mp->mnt_data = NULL; 491 } 492 return error; 493 } 494 495 /* 496 * Make a filesystem operational. 497 * Nothing to do at the moment. 498 */ 499 /* ARGSUSED */ 500 int 501 cd9660_start(struct mount *mp, int flags) 502 { 503 return 0; 504 } 505 506 /* 507 * unmount system call 508 */ 509 int 510 cd9660_unmount(struct mount *mp, int mntflags) 511 { 512 struct iso_mnt *isomp; 513 int error, flags = 0; 514 515 if (mntflags & MNT_FORCE) 516 flags |= FORCECLOSE; 517 if ((error = vflush(mp, NULLVP, flags)) != 0) 518 return (error); 519 520 isomp = VFSTOISOFS(mp); 521 522 if (isomp->im_devvp->v_type != VBAD) 523 isomp->im_devvp->v_specmountpoint = NULL; 524 525 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 526 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 527 vput(isomp->im_devvp); 528 free(isomp, M_ISOFSMNT); 529 mp->mnt_data = NULL; 530 mp->mnt_flag &= ~MNT_LOCAL; 531 return (error); 532 } 533 534 /* 535 * Return root of a filesystem 536 */ 537 int 538 cd9660_root(struct mount *mp, struct vnode **vpp) 539 { 540 struct iso_mnt *imp = VFSTOISOFS(mp); 541 struct iso_directory_record *dp = 542 (struct iso_directory_record *)imp->root; 543 ino_t ino = isodirino(dp, imp); 544 545 /* 546 * With RRIP we must use the `.' entry of the root directory. 547 * Simply tell vget, that it's a relocated directory. 548 */ 549 return (cd9660_vget_internal(mp, ino, vpp, 550 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 551 } 552 553 /* 554 * Get file system statistics. 555 */ 556 int 557 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 558 { 559 struct iso_mnt *isomp; 560 561 isomp = VFSTOISOFS(mp); 562 563 sbp->f_bsize = isomp->logical_block_size; 564 sbp->f_frsize = sbp->f_bsize; 565 sbp->f_iosize = sbp->f_bsize; /* XXX */ 566 sbp->f_blocks = isomp->volume_space_size; 567 sbp->f_bfree = 0; /* total free blocks */ 568 sbp->f_bavail = 0; /* blocks free for non superuser */ 569 sbp->f_bresvd = 0; /* total reserved blocks */ 570 sbp->f_files = 0; /* total files */ 571 sbp->f_ffree = 0; /* free file nodes */ 572 sbp->f_favail = 0; /* free file nodes for non superuser */ 573 sbp->f_fresvd = 0; /* reserved file nodes */ 574 copy_statvfs_info(sbp, mp); 575 /* Use the first spare for flags: */ 576 sbp->f_spare[0] = isomp->im_flags; 577 return 0; 578 } 579 580 /* ARGSUSED */ 581 int 582 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 583 { 584 return 0; 585 } 586 587 /* 588 * File handle to vnode 589 * 590 * Have to be really careful about stale file handles: 591 * - check that the inode number is in range 592 * - call iget() to get the locked inode 593 * - check for an unallocated inode (i_mode == 0) 594 * - check that the generation number matches 595 */ 596 597 struct ifid { 598 ushort ifid_len; 599 ushort ifid_pad; 600 int ifid_ino; 601 long ifid_start; 602 }; 603 604 /* ARGSUSED */ 605 int 606 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 607 { 608 struct ifid ifh; 609 struct iso_node *ip; 610 struct vnode *nvp; 611 int error; 612 613 if (fhp->fid_len != sizeof(ifh)) 614 return EINVAL; 615 616 memcpy(&ifh, fhp, sizeof(ifh)); 617 #ifdef ISOFS_DBG 618 printf("fhtovp: ino %d, start %ld\n", 619 ifh.ifid_ino, ifh.ifid_start); 620 #endif 621 622 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 623 *vpp = NULLVP; 624 return (error); 625 } 626 ip = VTOI(nvp); 627 if (ip->inode.iso_mode == 0) { 628 vput(nvp); 629 *vpp = NULLVP; 630 return (ESTALE); 631 } 632 *vpp = nvp; 633 return (0); 634 } 635 636 int 637 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 638 { 639 640 /* 641 * XXXX 642 * It would be nice if we didn't always set the `relocated' flag 643 * and force the extra read, but I don't want to think about fixing 644 * that right now. 645 */ 646 return (cd9660_vget_internal(mp, ino, vpp, 647 #if 0 648 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 649 #else 650 0, 651 #endif 652 NULL)); 653 } 654 655 int 656 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 657 int relocated, struct iso_directory_record *isodir) 658 { 659 struct iso_mnt *imp; 660 struct iso_node *ip; 661 struct buf *bp; 662 struct vnode *vp; 663 dev_t dev; 664 int error; 665 666 imp = VFSTOISOFS(mp); 667 dev = imp->im_dev; 668 669 retry: 670 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP) 671 return (0); 672 673 /* Allocate a new vnode/iso_node. */ 674 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 675 *vpp = NULLVP; 676 return (error); 677 } 678 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 679 680 /* 681 * If someone beat us to it, put back the freshly allocated 682 * vnode/inode pair and retry. 683 */ 684 mutex_enter(&cd9660_hashlock); 685 if (cd9660_ihashget(dev, ino, 0) != NULL) { 686 mutex_exit(&cd9660_hashlock); 687 ungetnewvnode(vp); 688 pool_put(&cd9660_node_pool, ip); 689 goto retry; 690 } 691 692 memset(ip, 0, sizeof(struct iso_node)); 693 vp->v_data = ip; 694 ip->i_vnode = vp; 695 ip->i_dev = dev; 696 ip->i_number = ino; 697 ip->i_mnt = imp; 698 ip->i_devvp = imp->im_devvp; 699 genfs_node_init(vp, &cd9660_genfsops); 700 701 /* 702 * Put it onto its hash chain and lock it so that other requests for 703 * this inode will block if they arrive while we are sleeping waiting 704 * for old data structures to be purged or for the contents of the 705 * disk portion of this inode to be read. 706 */ 707 cd9660_ihashins(ip); 708 mutex_exit(&cd9660_hashlock); 709 710 if (isodir == 0) { 711 int lbn, off; 712 713 lbn = lblkno(imp, ino); 714 if (lbn >= imp->volume_space_size) { 715 vput(vp); 716 printf("fhtovp: lbn exceed volume space %d\n", lbn); 717 return (ESTALE); 718 } 719 720 off = blkoff(imp, ino); 721 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 722 vput(vp); 723 printf("fhtovp: crosses block boundary %d\n", 724 off + ISO_DIRECTORY_RECORD_SIZE); 725 return (ESTALE); 726 } 727 728 error = bread(imp->im_devvp, 729 lbn << (imp->im_bshift - DEV_BSHIFT), 730 imp->logical_block_size, NOCRED, &bp); 731 if (error) { 732 vput(vp); 733 brelse(bp, 0); 734 printf("fhtovp: bread error %d\n",error); 735 return (error); 736 } 737 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 738 739 if (off + isonum_711(isodir->length) > 740 imp->logical_block_size) { 741 vput(vp); 742 if (bp != 0) 743 brelse(bp, 0); 744 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 745 off +isonum_711(isodir->length), off, 746 isonum_711(isodir->length)); 747 return (ESTALE); 748 } 749 750 #if 0 751 if (isonum_733(isodir->extent) + 752 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 753 if (bp != 0) 754 brelse(bp, 0); 755 printf("fhtovp: file start miss %d vs %d\n", 756 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 757 ifhp->ifid_start); 758 return (ESTALE); 759 } 760 #endif 761 } else 762 bp = 0; 763 764 VREF(ip->i_devvp); 765 766 if (relocated) { 767 /* 768 * On relocated directories we must 769 * read the `.' entry out of a dir. 770 */ 771 ip->iso_start = ino >> imp->im_bshift; 772 if (bp != 0) 773 brelse(bp, 0); 774 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 775 vput(vp); 776 return (error); 777 } 778 isodir = (struct iso_directory_record *)bp->b_data; 779 } 780 781 ip->iso_extent = isonum_733(isodir->extent); 782 ip->i_size = isonum_733(isodir->size); 783 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 784 785 /* 786 * Setup time stamp, attribute 787 */ 788 vp->v_type = VNON; 789 switch (imp->iso_ftype) { 790 default: /* ISO_FTYPE_9660 */ 791 { 792 struct buf *bp2; 793 int off; 794 if ((imp->im_flags & ISOFSMNT_EXTATT) 795 && (off = isonum_711(isodir->ext_attr_length))) 796 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 797 NULL, &bp2); 798 else 799 bp2 = NULL; 800 cd9660_defattr(isodir, ip, bp2); 801 cd9660_deftstamp(isodir, ip, bp2); 802 if (bp2) 803 brelse(bp2, 0); 804 break; 805 } 806 case ISO_FTYPE_RRIP: 807 cd9660_rrip_analyze(isodir, ip, imp); 808 break; 809 } 810 811 if (bp != 0) 812 brelse(bp, 0); 813 814 /* 815 * Initialize the associated vnode 816 */ 817 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 818 case VFIFO: 819 vp->v_op = cd9660_fifoop_p; 820 break; 821 case VCHR: 822 case VBLK: 823 /* 824 * if device, look at device number table for translation 825 */ 826 vp->v_op = cd9660_specop_p; 827 spec_node_init(vp, ip->inode.iso_rdev); 828 break; 829 case VLNK: 830 case VNON: 831 case VSOCK: 832 case VDIR: 833 case VBAD: 834 break; 835 case VREG: 836 uvm_vnp_setsize(vp, ip->i_size); 837 break; 838 } 839 840 if (vp->v_type != VREG) 841 uvm_vnp_setsize(vp, 0); 842 843 if (ip->iso_extent == imp->root_extent) 844 vp->v_vflag |= VV_ROOT; 845 846 /* 847 * XXX need generation number? 848 */ 849 850 *vpp = vp; 851 return (0); 852 } 853 854 /* 855 * Vnode pointer to File handle 856 */ 857 /* ARGSUSED */ 858 int 859 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 860 { 861 struct iso_node *ip = VTOI(vp); 862 struct ifid ifh; 863 864 if (*fh_size < sizeof(struct ifid)) { 865 *fh_size = sizeof(struct ifid); 866 return E2BIG; 867 } 868 *fh_size = sizeof(struct ifid); 869 870 memset(&ifh, 0, sizeof(ifh)); 871 ifh.ifid_len = sizeof(struct ifid); 872 ifh.ifid_ino = ip->i_number; 873 ifh.ifid_start = ip->iso_start; 874 memcpy(fhp, &ifh, sizeof(ifh)); 875 876 #ifdef ISOFS_DBG 877 printf("vptofh: ino %d, start %ld\n", 878 ifh.ifid_ino,ifh.ifid_start); 879 #endif 880 return 0; 881 } 882 883 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 884 { 885 886 sysctl_createv(clog, 0, NULL, NULL, 887 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 888 NULL, 0, NULL, 0, 889 CTL_VFS, CTL_EOL); 890 sysctl_createv(clog, 0, NULL, NULL, 891 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 892 SYSCTL_DESCR("ISO-9660 file system"), 893 NULL, 0, NULL, 0, 894 CTL_VFS, 14, CTL_EOL); 895 896 sysctl_createv(clog, 0, NULL, NULL, 897 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 898 CTLTYPE_INT, "utf8_joliet", 899 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 900 NULL, 0, &cd9660_utf8_joliet, 0, 901 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 902 903 } 904
Indexes created Mon Sep 29 21:09:56 GMT 2025