cd9660_vfsops.c revision 1.57
1 /* $NetBSD: cd9660_vfsops.c,v 1.57 2008/02/27 19:43:36 matt 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 1.57 2008/02/27 19:43:36 matt 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 cd9660_vnodeopv_descs, 112 0, /* refcount */ 113 { NULL, NULL } /* list */ 114 }; 115 VFS_ATTACH(cd9660_vfsops); 116 117 static const struct genfs_ops cd9660_genfsops = { 118 .gop_size = genfs_size, 119 }; 120 121 /* 122 * Called by vfs_mountroot when iso is going to be mounted as root. 123 * 124 * Name is updated by mount(8) after booting. 125 */ 126 #define ROOTNAME "root_device" 127 128 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 129 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 130 struct lwp *l, struct iso_args *argp); 131 132 int 133 cd9660_mountroot(void) 134 { 135 struct mount *mp; 136 struct lwp *l = curlwp; 137 int error; 138 struct iso_args args; 139 140 if (device_class(root_device) != DV_DISK) 141 return (ENODEV); 142 143 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 144 != 0) { 145 vrele(rootvp); 146 return (error); 147 } 148 149 args.flags = ISOFSMNT_ROOT; 150 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 151 vfs_unbusy(mp, false); 152 vfs_destroy(mp); 153 return (error); 154 } 155 mutex_enter(&mountlist_lock); 156 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 157 mutex_exit(&mountlist_lock); 158 (void)cd9660_statvfs(mp, &mp->mnt_stat); 159 vfs_unbusy(mp, false); 160 return (0); 161 } 162 163 /* 164 * VFS Operations. 165 * 166 * mount system call 167 */ 168 int 169 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 170 { 171 struct lwp *l = curlwp; 172 struct nameidata nd; 173 struct vnode *devvp; 174 struct iso_args *args = data; 175 int error; 176 struct iso_mnt *imp = VFSTOISOFS(mp); 177 178 if (*data_len < sizeof *args) 179 return EINVAL; 180 181 if (mp->mnt_flag & MNT_GETARGS) { 182 if (imp == NULL) 183 return EIO; 184 args->fspec = NULL; 185 args->flags = imp->im_flags; 186 *data_len = sizeof (*args); 187 return 0; 188 } 189 190 if ((mp->mnt_flag & MNT_RDONLY) == 0) 191 return (EROFS); 192 193 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 194 return EINVAL; 195 196 /* 197 * Not an update, or updating the name: look up the name 198 * and verify that it refers to a sensible block device. 199 */ 200 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 201 if ((error = namei(&nd)) != 0) 202 return (error); 203 devvp = nd.ni_vp; 204 205 if (devvp->v_type != VBLK) { 206 vrele(devvp); 207 return ENOTBLK; 208 } 209 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 210 vrele(devvp); 211 return ENXIO; 212 } 213 /* 214 * If mount by non-root, then verify that user has necessary 215 * permissions on the device. 216 */ 217 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) { 218 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 219 error = VOP_ACCESS(devvp, VREAD, l->l_cred); 220 VOP_UNLOCK(devvp, 0); 221 if (error) { 222 vrele(devvp); 223 return (error); 224 } 225 } 226 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 227 error = VOP_OPEN(devvp, FREAD, FSCRED); 228 if (error) 229 goto fail; 230 error = iso_mountfs(devvp, mp, l, args); 231 if (error) { 232 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 233 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 234 VOP_UNLOCK(devvp, 0); 235 goto fail; 236 } 237 } else { 238 vrele(devvp); 239 if (devvp != imp->im_devvp) 240 return (EINVAL); /* needs translation */ 241 } 242 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 243 mp->mnt_op->vfs_name, mp, l); 244 245 fail: 246 vrele(devvp); 247 return (error); 248 } 249 250 /* 251 * Make a mount point from a volume descriptor 252 */ 253 static int 254 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len) 255 { 256 struct iso_primary_descriptor *pri; 257 int logical_block_size; 258 struct iso_directory_record *rootp; 259 260 pri = (struct iso_primary_descriptor *)bp->b_data; 261 262 logical_block_size = isonum_723 (pri->logical_block_size); 263 264 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 265 || (logical_block_size & (logical_block_size - 1)) != 0) 266 return -1; 267 268 rootp = (struct iso_directory_record *)pri->root_directory_record; 269 270 isomp->logical_block_size = logical_block_size; 271 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 272 memcpy(isomp->root, rootp, sizeof(isomp->root)); 273 isomp->root_extent = isonum_733 (rootp->extent); 274 isomp->root_size = isonum_733 (rootp->size); 275 isomp->im_joliet_level = 0; 276 277 isomp->im_bmask = logical_block_size - 1; 278 isomp->im_bshift = 0; 279 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 280 isomp->im_bshift++; 281 282 if (ea_len != NULL) 283 *ea_len = isonum_711(rootp->ext_attr_length); 284 285 return 0; 286 } 287 288 /* 289 * Common code for mount and mountroot 290 */ 291 static int 292 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, 293 struct iso_args *argp) 294 { 295 struct iso_mnt *isomp = (struct iso_mnt *)0; 296 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 297 dev_t dev = devvp->v_rdev; 298 int error = EINVAL; 299 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 300 int iso_bsize; 301 int iso_blknum; 302 int joliet_level; 303 struct iso_volume_descriptor *vdp; 304 struct iso_supplementary_descriptor *sup; 305 int sess = 0; 306 int ext_attr_length; 307 struct disklabel label; 308 309 if (!ronly) 310 return EROFS; 311 312 /* Flush out any old buffers remaining from a previous use. */ 313 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 314 return (error); 315 316 /* This is the "logical sector size". The standard says this 317 * should be 2048 or the physical sector size on the device, 318 * whichever is greater. For now, we'll just use a constant. 319 */ 320 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 321 322 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 323 if (!error && 324 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 325 /* XXX more sanity checks? */ 326 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 327 } else { 328 /* fallback to old method */ 329 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 330 if (error) 331 sess = 0; /* never mind */ 332 } 333 #ifdef ISO_DEBUG 334 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 335 #endif 336 337 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 338 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 339 iso_bsize, NOCRED, &bp)) != 0) 340 goto out; 341 342 vdp = (struct iso_volume_descriptor *)bp->b_data; 343 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 344 error = EINVAL; 345 goto out; 346 } 347 348 switch (isonum_711(vdp->type)) { 349 case ISO_VD_PRIMARY: 350 if (pribp == NULL) { 351 pribp = bp; 352 bp = NULL; 353 } 354 break; 355 356 case ISO_VD_SUPPLEMENTARY: 357 if (supbp == NULL) { 358 supbp = bp; 359 bp = NULL; 360 } 361 break; 362 363 default: 364 break; 365 } 366 367 if (isonum_711 (vdp->type) == ISO_VD_END) { 368 brelse(bp, 0); 369 bp = NULL; 370 break; 371 } 372 373 if (bp != NULL) { 374 brelse(bp, 0); 375 bp = NULL; 376 } 377 } 378 379 if (pribp == NULL) { 380 error = EINVAL; 381 goto out; 382 } 383 384 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 385 memset(isomp, 0, sizeof *isomp); 386 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 387 error = EINVAL; 388 goto out; 389 } 390 391 isomp->volume_space_size += sess; 392 393 brelse(pribp, BC_AGE); 394 pribp = NULL; 395 396 mp->mnt_data = isomp; 397 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 398 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 399 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 400 mp->mnt_stat.f_namemax = MAXNAMLEN; 401 mp->mnt_flag |= MNT_LOCAL; 402 mp->mnt_iflag |= IMNT_MPSAFE; 403 mp->mnt_dev_bshift = iso_bsize; 404 mp->mnt_fs_bshift = isomp->im_bshift; 405 isomp->im_mountp = mp; 406 isomp->im_dev = dev; 407 isomp->im_devvp = devvp; 408 409 /* Check the Rock Ridge Extension support */ 410 if (!(argp->flags & ISOFSMNT_NORRIP)) { 411 struct iso_directory_record *rootp; 412 413 if ((error = bread(isomp->im_devvp, 414 (isomp->root_extent + ext_attr_length) << 415 (isomp->im_bshift - DEV_BSHIFT), 416 isomp->logical_block_size, NOCRED, 417 &bp)) != 0) 418 goto out; 419 420 rootp = (struct iso_directory_record *)bp->b_data; 421 422 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 423 argp->flags |= ISOFSMNT_NORRIP; 424 } else { 425 argp->flags &= ~ISOFSMNT_GENS; 426 } 427 428 /* 429 * The contents are valid, 430 * but they will get reread as part of another vnode, so... 431 */ 432 brelse(bp, BC_AGE); 433 bp = NULL; 434 } 435 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 436 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 437 438 if (isomp->im_flags & ISOFSMNT_GENS) 439 isomp->iso_ftype = ISO_FTYPE_9660; 440 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 441 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 442 if (argp->flags & ISOFSMNT_NOCASETRANS) 443 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 444 } else 445 isomp->iso_ftype = ISO_FTYPE_RRIP; 446 447 /* Check the Joliet Extension support */ 448 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 449 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 450 supbp != NULL) { 451 joliet_level = 0; 452 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 453 454 if ((isonum_711(sup->flags) & 1) == 0) { 455 if (memcmp(sup->escape, "%/@", 3) == 0) 456 joliet_level = 1; 457 if (memcmp(sup->escape, "%/C", 3) == 0) 458 joliet_level = 2; 459 if (memcmp(sup->escape, "%/E", 3) == 0) 460 joliet_level = 3; 461 } 462 if (joliet_level != 0) { 463 if (iso_makemp(isomp, supbp, NULL) == -1) { 464 error = EINVAL; 465 goto out; 466 } 467 isomp->im_joliet_level = joliet_level; 468 } 469 } 470 471 if (supbp != NULL) { 472 brelse(supbp, 0); 473 supbp = NULL; 474 } 475 476 devvp->v_specmountpoint = mp; 477 478 return 0; 479 out: 480 if (bp) 481 brelse(bp, 0); 482 if (pribp) 483 brelse(pribp, 0); 484 if (supbp) 485 brelse(supbp, 0); 486 if (isomp) { 487 free(isomp, M_ISOFSMNT); 488 mp->mnt_data = NULL; 489 } 490 return error; 491 } 492 493 /* 494 * Make a filesystem operational. 495 * Nothing to do at the moment. 496 */ 497 /* ARGSUSED */ 498 int 499 cd9660_start(struct mount *mp, int flags) 500 { 501 return 0; 502 } 503 504 /* 505 * unmount system call 506 */ 507 int 508 cd9660_unmount(struct mount *mp, int mntflags) 509 { 510 struct iso_mnt *isomp; 511 int error, flags = 0; 512 513 if (mntflags & MNT_FORCE) 514 flags |= FORCECLOSE; 515 if ((error = vflush(mp, NULLVP, flags)) != 0) 516 return (error); 517 518 isomp = VFSTOISOFS(mp); 519 520 if (isomp->im_devvp->v_type != VBAD) 521 isomp->im_devvp->v_specmountpoint = NULL; 522 523 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 524 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 525 vput(isomp->im_devvp); 526 free(isomp, M_ISOFSMNT); 527 mp->mnt_data = NULL; 528 mp->mnt_flag &= ~MNT_LOCAL; 529 return (error); 530 } 531 532 /* 533 * Return root of a filesystem 534 */ 535 int 536 cd9660_root(struct mount *mp, struct vnode **vpp) 537 { 538 struct iso_mnt *imp = VFSTOISOFS(mp); 539 struct iso_directory_record *dp = 540 (struct iso_directory_record *)imp->root; 541 ino_t ino = isodirino(dp, imp); 542 543 /* 544 * With RRIP we must use the `.' entry of the root directory. 545 * Simply tell vget, that it's a relocated directory. 546 */ 547 return (cd9660_vget_internal(mp, ino, vpp, 548 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 549 } 550 551 /* 552 * Get file system statistics. 553 */ 554 int 555 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 556 { 557 struct iso_mnt *isomp; 558 559 isomp = VFSTOISOFS(mp); 560 561 sbp->f_bsize = isomp->logical_block_size; 562 sbp->f_frsize = sbp->f_bsize; 563 sbp->f_iosize = sbp->f_bsize; /* XXX */ 564 sbp->f_blocks = isomp->volume_space_size; 565 sbp->f_bfree = 0; /* total free blocks */ 566 sbp->f_bavail = 0; /* blocks free for non superuser */ 567 sbp->f_bresvd = 0; /* total reserved blocks */ 568 sbp->f_files = 0; /* total files */ 569 sbp->f_ffree = 0; /* free file nodes */ 570 sbp->f_favail = 0; /* free file nodes for non superuser */ 571 sbp->f_fresvd = 0; /* reserved file nodes */ 572 copy_statvfs_info(sbp, mp); 573 /* Use the first spare for flags: */ 574 sbp->f_spare[0] = isomp->im_flags; 575 return 0; 576 } 577 578 /* ARGSUSED */ 579 int 580 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 581 { 582 return 0; 583 } 584 585 /* 586 * File handle to vnode 587 * 588 * Have to be really careful about stale file handles: 589 * - check that the inode number is in range 590 * - call iget() to get the locked inode 591 * - check for an unallocated inode (i_mode == 0) 592 * - check that the generation number matches 593 */ 594 595 struct ifid { 596 ushort ifid_len; 597 ushort ifid_pad; 598 int ifid_ino; 599 long ifid_start; 600 }; 601 602 /* ARGSUSED */ 603 int 604 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 605 { 606 struct ifid ifh; 607 struct iso_node *ip; 608 struct vnode *nvp; 609 int error; 610 611 if (fhp->fid_len != sizeof(ifh)) 612 return EINVAL; 613 614 memcpy(&ifh, fhp, sizeof(ifh)); 615 #ifdef ISOFS_DBG 616 printf("fhtovp: ino %d, start %ld\n", 617 ifh.ifid_ino, ifh.ifid_start); 618 #endif 619 620 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 621 *vpp = NULLVP; 622 return (error); 623 } 624 ip = VTOI(nvp); 625 if (ip->inode.iso_mode == 0) { 626 vput(nvp); 627 *vpp = NULLVP; 628 return (ESTALE); 629 } 630 *vpp = nvp; 631 return (0); 632 } 633 634 int 635 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 636 { 637 638 /* 639 * XXXX 640 * It would be nice if we didn't always set the `relocated' flag 641 * and force the extra read, but I don't want to think about fixing 642 * that right now. 643 */ 644 return (cd9660_vget_internal(mp, ino, vpp, 645 #if 0 646 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 647 #else 648 0, 649 #endif 650 NULL)); 651 } 652 653 int 654 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 655 int relocated, struct iso_directory_record *isodir) 656 { 657 struct iso_mnt *imp; 658 struct iso_node *ip; 659 struct buf *bp; 660 struct vnode *vp; 661 dev_t dev; 662 int error; 663 664 imp = VFSTOISOFS(mp); 665 dev = imp->im_dev; 666 667 retry: 668 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP) 669 return (0); 670 671 /* Allocate a new vnode/iso_node. */ 672 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 673 *vpp = NULLVP; 674 return (error); 675 } 676 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 677 678 /* 679 * If someone beat us to it, put back the freshly allocated 680 * vnode/inode pair and retry. 681 */ 682 mutex_enter(&cd9660_hashlock); 683 if (cd9660_ihashget(dev, ino, 0) != NULL) { 684 mutex_exit(&cd9660_hashlock); 685 ungetnewvnode(vp); 686 pool_put(&cd9660_node_pool, ip); 687 goto retry; 688 } 689 690 memset(ip, 0, sizeof(struct iso_node)); 691 vp->v_data = ip; 692 ip->i_vnode = vp; 693 ip->i_dev = dev; 694 ip->i_number = ino; 695 ip->i_mnt = imp; 696 ip->i_devvp = imp->im_devvp; 697 genfs_node_init(vp, &cd9660_genfsops); 698 699 /* 700 * Put it onto its hash chain and lock it so that other requests for 701 * this inode will block if they arrive while we are sleeping waiting 702 * for old data structures to be purged or for the contents of the 703 * disk portion of this inode to be read. 704 */ 705 cd9660_ihashins(ip); 706 mutex_exit(&cd9660_hashlock); 707 708 if (isodir == 0) { 709 int lbn, off; 710 711 lbn = lblkno(imp, ino); 712 if (lbn >= imp->volume_space_size) { 713 vput(vp); 714 printf("fhtovp: lbn exceed volume space %d\n", lbn); 715 return (ESTALE); 716 } 717 718 off = blkoff(imp, ino); 719 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 720 vput(vp); 721 printf("fhtovp: crosses block boundary %d\n", 722 off + ISO_DIRECTORY_RECORD_SIZE); 723 return (ESTALE); 724 } 725 726 error = bread(imp->im_devvp, 727 lbn << (imp->im_bshift - DEV_BSHIFT), 728 imp->logical_block_size, NOCRED, &bp); 729 if (error) { 730 vput(vp); 731 brelse(bp, 0); 732 printf("fhtovp: bread error %d\n",error); 733 return (error); 734 } 735 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 736 737 if (off + isonum_711(isodir->length) > 738 imp->logical_block_size) { 739 vput(vp); 740 if (bp != 0) 741 brelse(bp, 0); 742 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 743 off +isonum_711(isodir->length), off, 744 isonum_711(isodir->length)); 745 return (ESTALE); 746 } 747 748 #if 0 749 if (isonum_733(isodir->extent) + 750 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 751 if (bp != 0) 752 brelse(bp, 0); 753 printf("fhtovp: file start miss %d vs %d\n", 754 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 755 ifhp->ifid_start); 756 return (ESTALE); 757 } 758 #endif 759 } else 760 bp = 0; 761 762 VREF(ip->i_devvp); 763 764 if (relocated) { 765 /* 766 * On relocated directories we must 767 * read the `.' entry out of a dir. 768 */ 769 ip->iso_start = ino >> imp->im_bshift; 770 if (bp != 0) 771 brelse(bp, 0); 772 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 773 vput(vp); 774 return (error); 775 } 776 isodir = (struct iso_directory_record *)bp->b_data; 777 } 778 779 ip->iso_extent = isonum_733(isodir->extent); 780 ip->i_size = isonum_733(isodir->size); 781 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 782 783 /* 784 * Setup time stamp, attribute 785 */ 786 vp->v_type = VNON; 787 switch (imp->iso_ftype) { 788 default: /* ISO_FTYPE_9660 */ 789 { 790 struct buf *bp2; 791 int off; 792 if ((imp->im_flags & ISOFSMNT_EXTATT) 793 && (off = isonum_711(isodir->ext_attr_length))) 794 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 795 NULL, &bp2); 796 else 797 bp2 = NULL; 798 cd9660_defattr(isodir, ip, bp2); 799 cd9660_deftstamp(isodir, ip, bp2); 800 if (bp2) 801 brelse(bp2, 0); 802 break; 803 } 804 case ISO_FTYPE_RRIP: 805 cd9660_rrip_analyze(isodir, ip, imp); 806 break; 807 } 808 809 if (bp != 0) 810 brelse(bp, 0); 811 812 /* 813 * Initialize the associated vnode 814 */ 815 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 816 case VFIFO: 817 vp->v_op = cd9660_fifoop_p; 818 break; 819 case VCHR: 820 case VBLK: 821 /* 822 * if device, look at device number table for translation 823 */ 824 vp->v_op = cd9660_specop_p; 825 spec_node_init(vp, ip->inode.iso_rdev); 826 break; 827 case VLNK: 828 case VNON: 829 case VSOCK: 830 case VDIR: 831 case VBAD: 832 break; 833 case VREG: 834 uvm_vnp_setsize(vp, ip->i_size); 835 break; 836 } 837 838 if (vp->v_type != VREG) 839 uvm_vnp_setsize(vp, 0); 840 841 if (ip->iso_extent == imp->root_extent) 842 vp->v_vflag |= VV_ROOT; 843 844 /* 845 * XXX need generation number? 846 */ 847 848 *vpp = vp; 849 return (0); 850 } 851 852 /* 853 * Vnode pointer to File handle 854 */ 855 /* ARGSUSED */ 856 int 857 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 858 { 859 struct iso_node *ip = VTOI(vp); 860 struct ifid ifh; 861 862 if (*fh_size < sizeof(struct ifid)) { 863 *fh_size = sizeof(struct ifid); 864 return E2BIG; 865 } 866 *fh_size = sizeof(struct ifid); 867 868 memset(&ifh, 0, sizeof(ifh)); 869 ifh.ifid_len = sizeof(struct ifid); 870 ifh.ifid_ino = ip->i_number; 871 ifh.ifid_start = ip->iso_start; 872 memcpy(fhp, &ifh, sizeof(ifh)); 873 874 #ifdef ISOFS_DBG 875 printf("vptofh: ino %d, start %ld\n", 876 ifh.ifid_ino,ifh.ifid_start); 877 #endif 878 return 0; 879 } 880 881 SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup") 882 { 883 884 sysctl_createv(clog, 0, NULL, NULL, 885 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 886 NULL, 0, NULL, 0, 887 CTL_VFS, CTL_EOL); 888 sysctl_createv(clog, 0, NULL, NULL, 889 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 890 SYSCTL_DESCR("ISO-9660 file system"), 891 NULL, 0, NULL, 0, 892 CTL_VFS, 14, CTL_EOL); 893 894 sysctl_createv(clog, 0, NULL, NULL, 895 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 896 CTLTYPE_INT, "utf8_joliet", 897 SYSCTL_DESCR("Encode Joliet file names to UTF-8"), 898 NULL, 0, &cd9660_utf8_joliet, 0, 899 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 900 901 } 902
Indexes created Sat Sep 27 14:09:57 GMT 2025