cd9660_vfsops.c revision 1.58
1 /* $NetBSD: cd9660_vfsops.c,v 1.58 2008/04/29 18:18:08 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 1.58 2008/04/29 18:18:08 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); 153 vfs_destroy(mp); 154 return (error); 155 } 156 mutex_enter(&mountlist_lock); 157 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 158 mutex_exit(&mountlist_lock); 159 (void)cd9660_statvfs(mp, &mp->mnt_stat); 160 vfs_unbusy(mp, false); 161 return (0); 162 } 163 164 /* 165 * VFS Operations. 166 * 167 * mount system call 168 */ 169 int 170 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 171 { 172 struct lwp *l = curlwp; 173 struct nameidata nd; 174 struct vnode *devvp; 175 struct iso_args *args = data; 176 int error; 177 struct iso_mnt *imp = VFSTOISOFS(mp); 178 179 if (*data_len < sizeof *args) 180 return EINVAL; 181 182 if (mp->mnt_flag & MNT_GETARGS) { 183 if (imp == NULL) 184 return EIO; 185 args->fspec = NULL; 186 args->flags = imp->im_flags; 187 *data_len = sizeof (*args); 188 return 0; 189 } 190 191 if ((mp->mnt_flag & MNT_RDONLY) == 0) 192 return (EROFS); 193 194 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 195 return EINVAL; 196 197 /* 198 * Not an update, or updating the name: look up the name 199 * and verify that it refers to a sensible block device. 200 */ 201 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 202 if ((error = namei(&nd)) != 0) 203 return (error); 204 devvp = nd.ni_vp; 205 206 if (devvp->v_type != VBLK) { 207 vrele(devvp); 208 return ENOTBLK; 209 } 210 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 211 vrele(devvp); 212 return ENXIO; 213 } 214 /* 215 * If mount by non-root, then verify that user has necessary 216 * permissions on the device. 217 */ 218 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) { 219 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 220 error = VOP_ACCESS(devvp, VREAD, l->l_cred); 221 VOP_UNLOCK(devvp, 0); 222 if (error) { 223 vrele(devvp); 224 return (error); 225 } 226 } 227 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 228 error = VOP_OPEN(devvp, FREAD, FSCRED); 229 if (error) 230 goto fail; 231 error = iso_mountfs(devvp, mp, l, args); 232 if (error) { 233 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 234 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 235 VOP_UNLOCK(devvp, 0); 236 goto fail; 237 } 238 } else { 239 vrele(devvp); 240 if (devvp != imp->im_devvp) 241 return (EINVAL); /* needs translation */ 242 } 243 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 244 mp->mnt_op->vfs_name, mp, l); 245 246 fail: 247 vrele(devvp); 248 return (error); 249 } 250 251 /* 252 * Make a mount point from a volume descriptor 253 */ 254 static int 255 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len) 256 { 257 struct iso_primary_descriptor *pri; 258 int logical_block_size; 259 struct iso_directory_record *rootp; 260 261 pri = (struct iso_primary_descriptor *)bp->b_data; 262 263 logical_block_size = isonum_723 (pri->logical_block_size); 264 265 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 266 || (logical_block_size & (logical_block_size - 1)) != 0) 267 return -1; 268 269 rootp = (struct iso_directory_record *)pri->root_directory_record; 270 271 isomp->logical_block_size = logical_block_size; 272 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 273 memcpy(isomp->root, rootp, sizeof(isomp->root)); 274 isomp->root_extent = isonum_733 (rootp->extent); 275 isomp->root_size = isonum_733 (rootp->size); 276 isomp->im_joliet_level = 0; 277 278 isomp->im_bmask = logical_block_size - 1; 279 isomp->im_bshift = 0; 280 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 281 isomp->im_bshift++; 282 283 if (ea_len != NULL) 284 *ea_len = isonum_711(rootp->ext_attr_length); 285 286 return 0; 287 } 288 289 /* 290 * Common code for mount and mountroot 291 */ 292 static int 293 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, 294 struct iso_args *argp) 295 { 296 struct iso_mnt *isomp = (struct iso_mnt *)0; 297 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 298 dev_t dev = devvp->v_rdev; 299 int error = EINVAL; 300 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 301 int iso_bsize; 302 int iso_blknum; 303 int joliet_level; 304 struct iso_volume_descriptor *vdp; 305 struct iso_supplementary_descriptor *sup; 306 int sess = 0; 307 int ext_attr_length; 308 struct disklabel label; 309 310 if (!ronly) 311 return EROFS; 312 313 /* Flush out any old buffers remaining from a previous use. */ 314 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 315 return (error); 316 317 /* This is the "logical sector size". The standard says this 318 * should be 2048 or the physical sector size on the device, 319 * whichever is greater. For now, we'll just use a constant. 320 */ 321 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 322 323 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 324 if (!error && 325 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 326 /* XXX more sanity checks? */ 327 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 328 } else { 329 /* fallback to old method */ 330 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 331 if (error) 332 sess = 0; /* never mind */ 333 } 334 #ifdef ISO_DEBUG 335 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 336 #endif 337 338 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 339 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 340 iso_bsize, NOCRED, &bp)) != 0) 341 goto out; 342 343 vdp = (struct iso_volume_descriptor *)bp->b_data; 344 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 345 error = EINVAL; 346 goto out; 347 } 348 349 switch (isonum_711(vdp->type)) { 350 case ISO_VD_PRIMARY: 351 if (pribp == NULL) { 352 pribp = bp; 353 bp = NULL; 354 } 355 break; 356 357 case ISO_VD_SUPPLEMENTARY: 358 if (supbp == NULL) { 359 supbp = bp; 360 bp = NULL; 361 } 362 break; 363 364 default: 365 break; 366 } 367 368 if (isonum_711 (vdp->type) == ISO_VD_END) { 369 brelse(bp, 0); 370 bp = NULL; 371 break; 372 } 373 374 if (bp != NULL) { 375 brelse(bp, 0); 376 bp = NULL; 377 } 378 } 379 380 if (pribp == NULL) { 381 error = EINVAL; 382 goto out; 383 } 384 385 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 386 memset(isomp, 0, sizeof *isomp); 387 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 388 error = EINVAL; 389 goto out; 390 } 391 392 isomp->volume_space_size += sess; 393 394 brelse(pribp, BC_AGE); 395 pribp = NULL; 396 397 mp->mnt_data = isomp; 398 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 399 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 400 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 401 mp->mnt_stat.f_namemax = MAXNAMLEN; 402 mp->mnt_flag |= MNT_LOCAL; 403 mp->mnt_iflag |= IMNT_MPSAFE; 404 mp->mnt_dev_bshift = iso_bsize; 405 mp->mnt_fs_bshift = isomp->im_bshift; 406 isomp->im_mountp = mp; 407 isomp->im_dev = dev; 408 isomp->im_devvp = devvp; 409 410 /* Check the Rock Ridge Extension support */ 411 if (!(argp->flags & ISOFSMNT_NORRIP)) { 412 struct iso_directory_record *rootp; 413 414 if ((error = bread(isomp->im_devvp, 415 (isomp->root_extent + ext_attr_length) << 416 (isomp->im_bshift - DEV_BSHIFT), 417 isomp->logical_block_size, NOCRED, 418 &bp)) != 0) 419 goto out; 420 421 rootp = (struct iso_directory_record *)bp->b_data; 422 423 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 424 argp->flags |= ISOFSMNT_NORRIP; 425 } else { 426 argp->flags &= ~ISOFSMNT_GENS; 427 } 428 429 /* 430 * The contents are valid, 431 * but they will get reread as part of another vnode, so... 432 */ 433 brelse(bp, BC_AGE); 434 bp = NULL; 435 } 436 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 437 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 438 439 if (isomp->im_flags & ISOFSMNT_GENS) 440 isomp->iso_ftype = ISO_FTYPE_9660; 441 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 442 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 443 if (argp->flags & ISOFSMNT_NOCASETRANS) 444 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 445 } else 446 isomp->iso_ftype = ISO_FTYPE_RRIP; 447 448 /* Check the Joliet Extension support */ 449 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 450 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 451 supbp != NULL) { 452 joliet_level = 0; 453 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 454 455 if ((isonum_711(sup->flags) & 1) == 0) { 456 if (memcmp(sup->escape, "%/@", 3) == 0) 457 joliet_level = 1; 458 if (memcmp(sup->escape, "%/C", 3) == 0) 459 joliet_level = 2; 460 if (memcmp(sup->escape, "%/E", 3) == 0) 461 joliet_level = 3; 462 } 463 if (joliet_level != 0) { 464 if (iso_makemp(isomp, supbp, NULL) == -1) { 465 error = EINVAL; 466 goto out; 467 } 468 isomp->im_joliet_level = joliet_level; 469 } 470 } 471 472 if (supbp != NULL) { 473 brelse(supbp, 0); 474 supbp = NULL; 475 } 476 477 devvp->v_specmountpoint = mp; 478 479 return 0; 480 out: 481 if (bp) 482 brelse(bp, 0); 483 if (pribp) 484 brelse(pribp, 0); 485 if (supbp) 486 brelse(supbp, 0); 487 if (isomp) { 488 free(isomp, M_ISOFSMNT); 489 mp->mnt_data = NULL; 490 } 491 return error; 492 } 493 494 /* 495 * Make a filesystem operational. 496 * Nothing to do at the moment. 497 */ 498 /* ARGSUSED */ 499 int 500 cd9660_start(struct mount *mp, int flags) 501 { 502 return 0; 503 } 504 505 /* 506 * unmount system call 507 */ 508 int 509 cd9660_unmount(struct mount *mp, int mntflags) 510 { 511 struct iso_mnt *isomp; 512 int error, flags = 0; 513 514 if (mntflags & MNT_FORCE) 515 flags |= FORCECLOSE; 516 if ((error = vflush(mp, NULLVP, flags)) != 0) 517 return (error); 518 519 isomp = VFSTOISOFS(mp); 520 521 if (isomp->im_devvp->v_type != VBAD) 522 isomp->im_devvp->v_specmountpoint = NULL; 523 524 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 525 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 526 vput(isomp->im_devvp); 527 free(isomp, M_ISOFSMNT); 528 mp->mnt_data = NULL; 529 mp->mnt_flag &= ~MNT_LOCAL; 530 return (error); 531 } 532 533 /* 534 * Return root of a filesystem 535 */ 536 int 537 cd9660_root(struct mount *mp, struct vnode **vpp) 538 { 539 struct iso_mnt *imp = VFSTOISOFS(mp); 540 struct iso_directory_record *dp = 541 (struct iso_directory_record *)imp->root; 542 ino_t ino = isodirino(dp, imp); 543 544 /* 545 * With RRIP we must use the `.' entry of the root directory. 546 * Simply tell vget, that it's a relocated directory. 547 */ 548 return (cd9660_vget_internal(mp, ino, vpp, 549 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 550 } 551 552 /* 553 * Get file system statistics. 554 */ 555 int 556 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 557 { 558 struct iso_mnt *isomp; 559 560 isomp = VFSTOISOFS(mp); 561 562 sbp->f_bsize = isomp->logical_block_size; 563 sbp->f_frsize = sbp->f_bsize; 564 sbp->f_iosize = sbp->f_bsize; /* XXX */ 565 sbp->f_blocks = isomp->volume_space_size; 566 sbp->f_bfree = 0; /* total free blocks */ 567 sbp->f_bavail = 0; /* blocks free for non superuser */ 568 sbp->f_bresvd = 0; /* total reserved blocks */ 569 sbp->f_files = 0; /* total files */ 570 sbp->f_ffree = 0; /* free file nodes */ 571 sbp->f_favail = 0; /* free file nodes for non superuser */ 572 sbp->f_fresvd = 0; /* reserved file nodes */ 573 copy_statvfs_info(sbp, mp); 574 /* Use the first spare for flags: */ 575 sbp->f_spare[0] = isomp->im_flags; 576 return 0; 577 } 578 579 /* ARGSUSED */ 580 int 581 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 582 { 583 return 0; 584 } 585 586 /* 587 * File handle to vnode 588 * 589 * Have to be really careful about stale file handles: 590 * - check that the inode number is in range 591 * - call iget() to get the locked inode 592 * - check for an unallocated inode (i_mode == 0) 593 * - check that the generation number matches 594 */ 595 596 struct ifid { 597 ushort ifid_len; 598 ushort ifid_pad; 599 int ifid_ino; 600 long ifid_start; 601 }; 602 603 /* ARGSUSED */ 604 int 605 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 606 { 607 struct ifid ifh; 608 struct iso_node *ip; 609 struct vnode *nvp; 610 int error; 611 612 if (fhp->fid_len != sizeof(ifh)) 613 return EINVAL; 614 615 memcpy(&ifh, fhp, sizeof(ifh)); 616 #ifdef ISOFS_DBG 617 printf("fhtovp: ino %d, start %ld\n", 618 ifh.ifid_ino, ifh.ifid_start); 619 #endif 620 621 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 622 *vpp = NULLVP; 623 return (error); 624 } 625 ip = VTOI(nvp); 626 if (ip->inode.iso_mode == 0) { 627 vput(nvp); 628 *vpp = NULLVP; 629 return (ESTALE); 630 } 631 *vpp = nvp; 632 return (0); 633 } 634 635 int 636 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 637 { 638 639 /* 640 * XXXX 641 * It would be nice if we didn't always set the `relocated' flag 642 * and force the extra read, but I don't want to think about fixing 643 * that right now. 644 */ 645 return (cd9660_vget_internal(mp, ino, vpp, 646 #if 0 647 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 648 #else 649 0, 650 #endif 651 NULL)); 652 } 653 654 int 655 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 656 int relocated, struct iso_directory_record *isodir) 657 { 658 struct iso_mnt *imp; 659 struct iso_node *ip; 660 struct buf *bp; 661 struct vnode *vp; 662 dev_t dev; 663 int error; 664 665 imp = VFSTOISOFS(mp); 666 dev = imp->im_dev; 667 668 retry: 669 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP) 670 return (0); 671 672 /* Allocate a new vnode/iso_node. */ 673 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 674 *vpp = NULLVP; 675 return (error); 676 } 677 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 678 679 /* 680 * If someone beat us to it, put back the freshly allocated 681 * vnode/inode pair and retry. 682 */ 683 mutex_enter(&cd9660_hashlock); 684 if (cd9660_ihashget(dev, ino, 0) != NULL) { 685 mutex_exit(&cd9660_hashlock); 686 ungetnewvnode(vp); 687 pool_put(&cd9660_node_pool, ip); 688 goto retry; 689 } 690 691 memset(ip, 0, sizeof(struct iso_node)); 692 vp->v_data = ip; 693 ip->i_vnode = vp; 694 ip->i_dev = dev; 695 ip->i_number = ino; 696 ip->i_mnt = imp; 697 ip->i_devvp = imp->im_devvp; 698 genfs_node_init(vp, &cd9660_genfsops); 699 700 /* 701 * Put it onto its hash chain and lock it so that other requests for 702 * this inode will block if they arrive while we are sleeping waiting 703 * for old data structures to be purged or for the contents of the 704 * disk portion of this inode to be read. 705 */ 706 cd9660_ihashins(ip); 707 mutex_exit(&cd9660_hashlock); 708 709 if (isodir == 0) { 710 int lbn, off; 711 712 lbn = lblkno(imp, ino); 713 if (lbn >= imp->volume_space_size) { 714 vput(vp); 715 printf("fhtovp: lbn exceed volume space %d\n", lbn); 716 return (ESTALE); 717 } 718 719 off = blkoff(imp, ino); 720 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 721 vput(vp); 722 printf("fhtovp: crosses block boundary %d\n", 723 off + ISO_DIRECTORY_RECORD_SIZE); 724 return (ESTALE); 725 } 726 727 error = bread(imp->im_devvp, 728 lbn << (imp->im_bshift - DEV_BSHIFT), 729 imp->logical_block_size, NOCRED, &bp); 730 if (error) { 731 vput(vp); 732 brelse(bp, 0); 733 printf("fhtovp: bread error %d\n",error); 734 return (error); 735 } 736 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 737 738 if (off + isonum_711(isodir->length) > 739 imp->logical_block_size) { 740 vput(vp); 741 if (bp != 0) 742 brelse(bp, 0); 743 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 744 off +isonum_711(isodir->length), off, 745 isonum_711(isodir->length)); 746 return (ESTALE); 747 } 748 749 #if 0 750 if (isonum_733(isodir->extent) + 751 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 752 if (bp != 0) 753 brelse(bp, 0); 754 printf("fhtovp: file start miss %d vs %d\n", 755 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 756 ifhp->ifid_start); 757 return (ESTALE); 758 } 759 #endif 760 } else 761 bp = 0; 762 763 VREF(ip->i_devvp); 764 765 if (relocated) { 766 /* 767 * On relocated directories we must 768 * read the `.' entry out of a dir. 769 */ 770 ip->iso_start = ino >> imp->im_bshift; 771 if (bp != 0) 772 brelse(bp, 0); 773 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 774 vput(vp); 775 return (error); 776 } 777 isodir = (struct iso_directory_record *)bp->b_data; 778 } 779 780 ip->iso_extent = isonum_733(isodir->extent); 781 ip->i_size = isonum_733(isodir->size); 782 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 783 784 /* 785 * Setup time stamp, attribute 786 */ 787 vp->v_type = VNON; 788 switch (imp->iso_ftype) { 789 default: /* ISO_FTYPE_9660 */ 790 { 791 struct buf *bp2; 792 int off; 793 if ((imp->im_flags & ISOFSMNT_EXTATT) 794 && (off = isonum_711(isodir->ext_attr_length))) 795 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 796 NULL, &bp2); 797 else 798 bp2 = NULL; 799 cd9660_defattr(isodir, ip, bp2); 800 cd9660_deftstamp(isodir, ip, bp2); 801 if (bp2) 802 brelse(bp2, 0); 803 break; 804 } 805 case ISO_FTYPE_RRIP: 806 cd9660_rrip_analyze(isodir, ip, imp); 807 break; 808 } 809 810 if (bp != 0) 811 brelse(bp, 0); 812 813 /* 814 * Initialize the associated vnode 815 */ 816 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 817 case VFIFO: 818 vp->v_op = cd9660_fifoop_p; 819 break; 820 case VCHR: 821 case VBLK: 822 /* 823 * if device, look at device number table for translation 824 */ 825 vp->v_op = cd9660_specop_p; 826 spec_node_init(vp, ip->inode.iso_rdev); 827 break; 828 case VLNK: 829 case VNON: 830 case VSOCK: 831 case VDIR: 832 case VBAD: 833 break; 834 case VREG: 835 uvm_vnp_setsize(vp, ip->i_size); 836 break; 837 } 838 839 if (vp->v_type != VREG) 840 uvm_vnp_setsize(vp, 0); 841 842 if (ip->iso_extent == imp->root_extent) 843 vp->v_vflag |= VV_ROOT; 844 845 /* 846 * XXX need generation number? 847 */ 848 849 *vpp = vp; 850 return (0); 851 } 852 853 /* 854 * Vnode pointer to File handle 855 */ 856 /* ARGSUSED */ 857 int 858 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 859 { 860 struct iso_node *ip = VTOI(vp); 861 struct ifid ifh; 862 863 if (*fh_size < sizeof(struct ifid)) { 864 *fh_size = sizeof(struct ifid); 865 return E2BIG; 866 } 867 *fh_size = sizeof(struct ifid); 868 869 memset(&ifh, 0, sizeof(ifh)); 870 ifh.ifid_len = sizeof(struct ifid); 871 ifh.ifid_ino = ip->i_number; 872 ifh.ifid_start = ip->iso_start; 873 memcpy(fhp, &ifh, sizeof(ifh)); 874 875 #ifdef ISOFS_DBG 876 printf("vptofh: ino %d, start %ld\n", 877 ifh.ifid_ino,ifh.ifid_start); 878 #endif 879 return 0; 880 } 881 882 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 883 { 884 885 sysctl_createv(clog, 0, NULL, NULL, 886 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 887 NULL, 0, NULL, 0, 888 CTL_VFS, CTL_EOL); 889 sysctl_createv(clog, 0, NULL, NULL, 890 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 891 SYSCTL_DESCR("ISO-9660 file system"), 892 NULL, 0, NULL, 0, 893 CTL_VFS, 14, CTL_EOL); 894 895 sysctl_createv(clog, 0, NULL, NULL, 896 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 897 CTLTYPE_INT, "utf8_joliet", 898 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 899 NULL, 0, &cd9660_utf8_joliet, 0, 900 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 901 902 } 903
Indexes created Mon Sep 29 21:09:56 GMT 2025