cd9660_vfsops.c revision 1.90.2.2
1 /* $NetBSD: cd9660_vfsops.c,v 1.90.2.2 2016/07/23 00:44:59 pgoyette 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 1.90.2.2 2016/07/23 00:44:59 pgoyette 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 static struct sysctllog *cd9660_sysctl_log; 82 83 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 84 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 85 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 86 87 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 88 &cd9660_vnodeop_opv_desc, 89 &cd9660_specop_opv_desc, 90 &cd9660_fifoop_opv_desc, 91 NULL, 92 }; 93 94 struct vfsops cd9660_vfsops = { 95 .vfs_name = MOUNT_CD9660, 96 .vfs_min_mount_data = sizeof (struct iso_args), 97 .vfs_mount = cd9660_mount, 98 .vfs_start = cd9660_start, 99 .vfs_unmount = cd9660_unmount, 100 .vfs_root = cd9660_root, 101 .vfs_quotactl = (void *)eopnotsupp, 102 .vfs_statvfs = cd9660_statvfs, 103 .vfs_sync = cd9660_sync, 104 .vfs_vget = cd9660_vget, 105 .vfs_loadvnode = cd9660_loadvnode, 106 .vfs_fhtovp = cd9660_fhtovp, 107 .vfs_vptofh = cd9660_vptofh, 108 .vfs_init = cd9660_init, 109 .vfs_reinit = cd9660_reinit, 110 .vfs_done = cd9660_done, 111 .vfs_mountroot = cd9660_mountroot, 112 .vfs_snapshot = (void *)eopnotsupp, 113 .vfs_extattrctl = vfs_stdextattrctl, 114 .vfs_suspendctl = (void *)eopnotsupp, 115 .vfs_renamelock_enter = genfs_renamelock_enter, 116 .vfs_renamelock_exit = genfs_renamelock_exit, 117 .vfs_fsync = (void *)eopnotsupp, 118 .vfs_opv_descs = cd9660_vnodeopv_descs 119 }; 120 121 static const struct genfs_ops cd9660_genfsops = { 122 .gop_size = genfs_size, 123 }; 124 125 /* 126 * Called by vfs_mountroot when iso is going to be mounted as root. 127 * 128 * Name is updated by mount(8) after booting. 129 */ 130 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 131 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 132 struct lwp *l, struct iso_args *argp); 133 134 static int 135 cd9660_modcmd(modcmd_t cmd, void *arg) 136 { 137 int error; 138 139 switch (cmd) { 140 case MODULE_CMD_INIT: 141 error = vfs_attach(&cd9660_vfsops); 142 if (error != 0) 143 break; 144 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, 145 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 146 SYSCTL_DESCR("ISO-9660 file system"), 147 NULL, 0, NULL, 0, 148 CTL_VFS, 14, CTL_EOL); 149 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, 150 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 151 CTLTYPE_INT, "utf8_joliet", 152 SYSCTL_DESCR("Encode Joliet filenames to UTF-8"), 153 NULL, 0, &cd9660_utf8_joliet, 0, 154 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 155 /* 156 * XXX the "14" above could be dynamic, thereby eliminating 157 * one more instance of the "number to vfs" mapping problem, 158 * but "14" is the order as taken from sys/mount.h 159 */ 160 break; 161 case MODULE_CMD_FINI: 162 error = vfs_detach(&cd9660_vfsops); 163 if (error != 0) 164 break; 165 sysctl_teardown(&cd9660_sysctl_log); 166 break; 167 default: 168 error = ENOTTY; 169 break; 170 } 171 172 return (error); 173 } 174 175 int 176 cd9660_mountroot(void) 177 { 178 struct mount *mp; 179 struct lwp *l = curlwp; 180 int error; 181 struct iso_args args; 182 183 if (device_class(root_device) != DV_DISK) 184 return (ENODEV); 185 186 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 187 != 0) { 188 vrele(rootvp); 189 return (error); 190 } 191 192 args.flags = ISOFSMNT_ROOT; 193 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 194 vfs_unbusy(mp, false, NULL); 195 vfs_destroy(mp); 196 return (error); 197 } 198 mountlist_append(mp); 199 (void)cd9660_statvfs(mp, &mp->mnt_stat); 200 vfs_unbusy(mp, false, NULL); 201 return (0); 202 } 203 204 /* 205 * VFS Operations. 206 * 207 * mount system call 208 */ 209 int 210 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 211 { 212 struct lwp *l = curlwp; 213 struct vnode *devvp; 214 struct iso_args *args = data; 215 int error; 216 struct iso_mnt *imp = VFSTOISOFS(mp); 217 const struct bdevsw *bdev; 218 219 if (args == NULL) 220 return EINVAL; 221 if (*data_len < sizeof *args) 222 return EINVAL; 223 224 if (mp->mnt_flag & MNT_GETARGS) { 225 if (imp == NULL) 226 return EIO; 227 args->fspec = NULL; 228 args->flags = imp->im_flags; 229 *data_len = sizeof (*args); 230 return 0; 231 } 232 233 if ((mp->mnt_flag & MNT_RDONLY) == 0) 234 return (EROFS); 235 236 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 237 return EINVAL; 238 239 /* 240 * Not an update, or updating the name: look up the name 241 * and verify that it refers to a sensible block device. 242 */ 243 error = namei_simple_user(args->fspec, 244 NSM_FOLLOW_NOEMULROOT, &devvp); 245 if (error != 0) 246 return (error); 247 248 if (devvp->v_type != VBLK) { 249 vrele(devvp); 250 return ENOTBLK; 251 } 252 if ((bdev = bdevsw_lookup_acquire(devvp->v_rdev)) == NULL) { 253 vrele(devvp); 254 return ENXIO; 255 } 256 /* 257 * If mount by non-root, then verify that user has necessary 258 * permissions on the device. 259 */ 260 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 261 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 262 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(VREAD)); 263 if (error) { 264 goto fail; 265 } 266 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 267 error = VOP_OPEN(devvp, FREAD, FSCRED); 268 if (error) 269 goto fail; 270 VOP_UNLOCK(devvp); 271 error = iso_mountfs(devvp, mp, l, args); 272 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 273 if (error) { 274 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 275 goto fail; 276 } 277 VOP_UNLOCK(devvp); 278 /* reference to devvp is donated through iso_mountfs */ 279 } else { 280 if (devvp != imp->im_devvp && 281 devvp->v_rdev != imp->im_devvp->v_rdev) { 282 error = EINVAL; /* needs translation */ 283 goto fail; 284 } 285 VOP_UNLOCK(devvp); 286 vrele(devvp); 287 } 288 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 289 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 290 bdevsw_release(bdev); 291 return error; 292 293 fail: 294 VOP_UNLOCK(devvp); 295 vrele(devvp); 296 bdevsw_release(bdev); 297 return (error); 298 } 299 300 /* 301 * Make a mount point from a volume descriptor 302 */ 303 static int 304 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len) 305 { 306 struct iso_primary_descriptor *pri; 307 int logical_block_size; 308 struct iso_directory_record *rootp; 309 310 pri = (struct iso_primary_descriptor *)bp->b_data; 311 312 logical_block_size = isonum_723 (pri->logical_block_size); 313 314 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 315 || (logical_block_size & (logical_block_size - 1)) != 0) 316 return -1; 317 318 rootp = (struct iso_directory_record *)pri->root_directory_record; 319 320 isomp->logical_block_size = logical_block_size; 321 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 322 memcpy(isomp->root, rootp, sizeof(isomp->root)); 323 isomp->root_extent = isonum_733 (rootp->extent); 324 isomp->root_size = isonum_733 (rootp->size); 325 isomp->im_joliet_level = 0; 326 327 isomp->im_bmask = logical_block_size - 1; 328 isomp->im_bshift = 0; 329 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 330 isomp->im_bshift++; 331 332 if (ea_len != NULL) 333 *ea_len = isonum_711(rootp->ext_attr_length); 334 335 return 0; 336 } 337 338 /* 339 * Common code for mount and mountroot 340 */ 341 static int 342 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, 343 struct iso_args *argp) 344 { 345 struct iso_mnt *isomp = (struct iso_mnt *)0; 346 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 347 dev_t dev = devvp->v_rdev; 348 int error = EINVAL; 349 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 350 int iso_bsize; 351 int iso_blknum; 352 int joliet_level; 353 struct iso_volume_descriptor *vdp; 354 struct iso_supplementary_descriptor *sup; 355 int sess = 0; 356 int ext_attr_length; 357 struct disklabel label; 358 359 if (!ronly) 360 return EROFS; 361 362 /* Flush out any old buffers remaining from a previous use. */ 363 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 364 return (error); 365 366 /* This is the "logical sector size". The standard says this 367 * should be 2048 or the physical sector size on the device, 368 * whichever is greater. For now, we'll just use a constant. 369 */ 370 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 371 372 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 373 if (!error) { 374 /* XXX more sanity checks? */ 375 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 376 } else { 377 /* fallback to old method */ 378 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 379 if (error) 380 sess = 0; /* never mind */ 381 } 382 #ifdef ISO_DEBUG 383 printf("isofs: session offset (part %"PRId32") %d\n", DISKPART(dev), sess); 384 #endif 385 386 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 387 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 388 iso_bsize, 0, &bp)) != 0) 389 goto out; 390 391 vdp = (struct iso_volume_descriptor *)bp->b_data; 392 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 393 error = EINVAL; 394 goto out; 395 } 396 397 switch (isonum_711(vdp->type)) { 398 case ISO_VD_PRIMARY: 399 if (pribp == NULL) { 400 pribp = bp; 401 bp = NULL; 402 } 403 break; 404 405 case ISO_VD_SUPPLEMENTARY: 406 if (supbp == NULL) { 407 supbp = bp; 408 bp = NULL; 409 } 410 break; 411 412 default: 413 break; 414 } 415 416 if (isonum_711 (vdp->type) == ISO_VD_END) { 417 brelse(bp, 0); 418 bp = NULL; 419 break; 420 } 421 422 if (bp != NULL) { 423 brelse(bp, 0); 424 bp = NULL; 425 } 426 } 427 428 if (pribp == NULL) { 429 error = EINVAL; 430 goto out; 431 } 432 433 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 434 memset(isomp, 0, sizeof *isomp); 435 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 436 error = EINVAL; 437 goto out; 438 } 439 440 isomp->volume_space_size += sess; 441 442 brelse(pribp, BC_AGE); 443 pribp = NULL; 444 445 mp->mnt_data = isomp; 446 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 447 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 448 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 449 mp->mnt_stat.f_namemax = ISO_MAXNAMLEN; 450 mp->mnt_flag |= MNT_LOCAL; 451 mp->mnt_iflag |= IMNT_MPSAFE; 452 mp->mnt_dev_bshift = iso_bsize; 453 mp->mnt_fs_bshift = isomp->im_bshift; 454 isomp->im_mountp = mp; 455 isomp->im_dev = dev; 456 isomp->im_devvp = devvp; 457 458 /* Check the Rock Ridge Extension support */ 459 if (!(argp->flags & ISOFSMNT_NORRIP)) { 460 struct iso_directory_record *rootp; 461 462 if ((error = bread(isomp->im_devvp, 463 (isomp->root_extent + ext_attr_length) << 464 (isomp->im_bshift - DEV_BSHIFT), 465 isomp->logical_block_size, 466 0, &bp)) != 0) 467 goto out; 468 469 rootp = (struct iso_directory_record *)bp->b_data; 470 471 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 472 argp->flags |= ISOFSMNT_NORRIP; 473 } else { 474 argp->flags &= ~ISOFSMNT_GENS; 475 } 476 477 /* 478 * The contents are valid, 479 * but they will get reread as part of another vnode, so... 480 */ 481 brelse(bp, BC_AGE); 482 bp = NULL; 483 } 484 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 485 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 486 487 if (isomp->im_flags & ISOFSMNT_GENS) 488 isomp->iso_ftype = ISO_FTYPE_9660; 489 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 490 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 491 if (argp->flags & ISOFSMNT_NOCASETRANS) 492 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 493 } else 494 isomp->iso_ftype = ISO_FTYPE_RRIP; 495 496 /* Check the Joliet Extension support */ 497 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 498 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 499 supbp != NULL) { 500 joliet_level = 0; 501 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 502 503 if ((isonum_711(sup->flags) & 1) == 0) { 504 if (memcmp(sup->escape, "%/@", 3) == 0) 505 joliet_level = 1; 506 if (memcmp(sup->escape, "%/C", 3) == 0) 507 joliet_level = 2; 508 if (memcmp(sup->escape, "%/E", 3) == 0) 509 joliet_level = 3; 510 } 511 if (joliet_level != 0) { 512 if (iso_makemp(isomp, supbp, NULL) == -1) { 513 error = EINVAL; 514 goto out; 515 } 516 isomp->im_joliet_level = joliet_level; 517 } 518 } 519 520 if (supbp != NULL) { 521 brelse(supbp, 0); 522 supbp = NULL; 523 } 524 525 spec_node_setmountedfs(devvp, mp); 526 527 return 0; 528 out: 529 if (bp) 530 brelse(bp, 0); 531 if (pribp) 532 brelse(pribp, 0); 533 if (supbp) 534 brelse(supbp, 0); 535 if (isomp) { 536 free(isomp, M_ISOFSMNT); 537 mp->mnt_data = NULL; 538 } 539 return error; 540 } 541 542 /* 543 * Make a filesystem operational. 544 * Nothing to do at the moment. 545 */ 546 /* ARGSUSED */ 547 int 548 cd9660_start(struct mount *mp, int flags) 549 { 550 return 0; 551 } 552 553 /* 554 * unmount system call 555 */ 556 int 557 cd9660_unmount(struct mount *mp, int mntflags) 558 { 559 struct iso_mnt *isomp; 560 int error, flags = 0; 561 562 if (mntflags & MNT_FORCE) 563 flags |= FORCECLOSE; 564 if ((error = vflush(mp, NULLVP, flags)) != 0) 565 return (error); 566 567 isomp = VFSTOISOFS(mp); 568 569 if (isomp->im_devvp->v_type != VBAD) 570 spec_node_setmountedfs(isomp->im_devvp, NULL); 571 572 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 573 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 574 vput(isomp->im_devvp); 575 free(isomp, M_ISOFSMNT); 576 mp->mnt_data = NULL; 577 mp->mnt_flag &= ~MNT_LOCAL; 578 return (error); 579 } 580 581 /* 582 * Return root of a filesystem 583 */ 584 int 585 cd9660_root(struct mount *mp, struct vnode **vpp) 586 { 587 struct iso_mnt *imp = VFSTOISOFS(mp); 588 struct iso_directory_record *dp = 589 (struct iso_directory_record *)imp->root; 590 ino_t ino = isodirino(dp, imp); 591 592 return cd9660_vget(mp, ino, vpp); 593 } 594 595 /* 596 * Get file system statistics. 597 */ 598 int 599 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 600 { 601 struct iso_mnt *isomp; 602 603 isomp = VFSTOISOFS(mp); 604 605 sbp->f_bsize = isomp->logical_block_size; 606 sbp->f_frsize = sbp->f_bsize; 607 sbp->f_iosize = sbp->f_bsize; /* XXX */ 608 sbp->f_blocks = isomp->volume_space_size; 609 sbp->f_bfree = 0; /* total free blocks */ 610 sbp->f_bavail = 0; /* blocks free for non superuser */ 611 sbp->f_bresvd = 0; /* total reserved blocks */ 612 sbp->f_files = 0; /* total files */ 613 sbp->f_ffree = 0; /* free file nodes */ 614 sbp->f_favail = 0; /* free file nodes for non superuser */ 615 sbp->f_fresvd = 0; /* reserved file nodes */ 616 copy_statvfs_info(sbp, mp); 617 /* Use the first spare for flags: */ 618 sbp->f_spare[0] = isomp->im_flags; 619 return 0; 620 } 621 622 /* ARGSUSED */ 623 int 624 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 625 { 626 return 0; 627 } 628 629 /* 630 * File handle to vnode 631 * 632 * Have to be really careful about stale file handles: 633 * - check that the inode number is in range 634 * - call iget() to get the locked inode 635 * - check for an unallocated inode (i_mode == 0) 636 * - check that the generation number matches 637 */ 638 639 struct ifid { 640 ushort ifid_len; 641 ushort ifid_pad; 642 ino_t ifid_ino; 643 #ifdef ISOFS_DBG 644 u_long ifid_start; 645 #endif 646 }; 647 648 /* ARGSUSED */ 649 int 650 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 651 { 652 struct ifid ifh; 653 struct iso_node *ip; 654 struct vnode *nvp; 655 int error; 656 657 if (fhp->fid_len != sizeof(ifh)) 658 return EINVAL; 659 660 memcpy(&ifh, fhp, sizeof(ifh)); 661 #ifdef ISOFS_DBG 662 printf("fhtovp: ino %"PRIu64", start %lu\n", 663 ifh.ifid_ino, ifh.ifid_start); 664 #endif 665 666 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 667 *vpp = NULLVP; 668 return (error); 669 } 670 ip = VTOI(nvp); 671 if (ip->inode.iso_mode == 0) { 672 vput(nvp); 673 *vpp = NULLVP; 674 return (ESTALE); 675 } 676 *vpp = nvp; 677 return (0); 678 } 679 680 int 681 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 682 { 683 int error; 684 685 error = vcache_get(mp, &ino, sizeof(ino), vpp); 686 if (error) 687 return error; 688 error = vn_lock(*vpp, LK_EXCLUSIVE); 689 if (error) { 690 vrele(*vpp); 691 *vpp = NULL; 692 return error; 693 } 694 return 0; 695 } 696 697 int 698 cd9660_loadvnode(struct mount *mp, struct vnode *vp, 699 const void *key, size_t key_len, const void **new_key) 700 { 701 struct iso_mnt *imp; 702 struct iso_node *ip; 703 struct iso_directory_record *isodir; 704 struct buf *bp; 705 dev_t dev; 706 ino_t ino; 707 int lbn, off; 708 int error; 709 710 KASSERT(key_len == sizeof(ino)); 711 memcpy(&ino, key, key_len); 712 imp = VFSTOISOFS(mp); 713 dev = imp->im_dev; 714 715 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 716 717 memset(ip, 0, sizeof(struct iso_node)); 718 ip->i_vnode = vp; 719 ip->i_dev = dev; 720 ip->i_number = ino; 721 ip->i_mnt = imp; 722 ip->i_devvp = imp->im_devvp; 723 724 lbn = cd9660_lblkno(imp, ino); 725 if (lbn >= imp->volume_space_size) { 726 pool_put(&cd9660_node_pool, ip); 727 printf("fhtovp: lbn exceed volume space %d\n", lbn); 728 return (ESTALE); 729 } 730 731 off = cd9660_blkoff(imp, ino); 732 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 733 pool_put(&cd9660_node_pool, ip); 734 printf("fhtovp: crosses block boundary %d\n", 735 off + ISO_DIRECTORY_RECORD_SIZE); 736 return (ESTALE); 737 } 738 739 error = bread(imp->im_devvp, 740 lbn << (imp->im_bshift - DEV_BSHIFT), 741 imp->logical_block_size, 0, &bp); 742 if (error) { 743 pool_put(&cd9660_node_pool, ip); 744 printf("fhtovp: bread error %d\n",error); 745 return (error); 746 } 747 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 748 749 if (off + isonum_711(isodir->length) > imp->logical_block_size) { 750 pool_put(&cd9660_node_pool, ip); 751 brelse(bp, 0); 752 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 753 off +isonum_711(isodir->length), off, 754 isonum_711(isodir->length)); 755 return (ESTALE); 756 } 757 758 #if 0 759 if (isonum_733(isodir->extent) + 760 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 761 pool_put(&cd9660_node_pool, ip); 762 if (bp != 0) 763 brelse(bp, 0); 764 printf("fhtovp: file start miss %d vs %d\n", 765 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 766 ifhp->ifid_start); 767 return (ESTALE); 768 } 769 #endif 770 771 ip->iso_extent = isonum_733(isodir->extent); 772 ip->i_size = isonum_733(isodir->size); 773 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 774 775 vp->v_tag = VT_ISOFS; 776 vp->v_op = cd9660_vnodeop_p; 777 vp->v_data = ip; 778 genfs_node_init(vp, &cd9660_genfsops); 779 780 /* 781 * Setup time stamp, attribute 782 */ 783 switch (imp->iso_ftype) { 784 default: /* ISO_FTYPE_9660 */ 785 { 786 struct buf *bp2; 787 if ((imp->im_flags & ISOFSMNT_EXTATT) 788 && (off = isonum_711(isodir->ext_attr_length))) 789 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 790 NULL, &bp2); 791 else 792 bp2 = NULL; 793 cd9660_defattr(isodir, ip, bp2); 794 cd9660_deftstamp(isodir, ip, bp2); 795 if (bp2) 796 brelse(bp2, 0); 797 break; 798 } 799 case ISO_FTYPE_RRIP: 800 cd9660_rrip_analyze(isodir, ip, imp); 801 break; 802 } 803 804 brelse(bp, 0); 805 806 /* 807 * Initialize the associated vnode 808 */ 809 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 810 case VFIFO: 811 vp->v_op = cd9660_fifoop_p; 812 break; 813 case VCHR: 814 case VBLK: 815 /* 816 * if device, look at device number table for translation 817 */ 818 vp->v_op = cd9660_specop_p; 819 spec_node_init(vp, ip->inode.iso_rdev); 820 break; 821 case VLNK: 822 case VNON: 823 case VSOCK: 824 case VDIR: 825 case VBAD: 826 break; 827 case VREG: 828 uvm_vnp_setsize(vp, ip->i_size); 829 break; 830 } 831 832 if (vp->v_type != VREG) 833 uvm_vnp_setsize(vp, 0); 834 835 if (ip->iso_extent == imp->root_extent) 836 vp->v_vflag |= VV_ROOT; 837 838 /* 839 * XXX need generation number? 840 */ 841 842 *new_key = &ip->i_number; 843 return 0; 844 } 845 846 /* 847 * Vnode pointer to File handle 848 */ 849 /* ARGSUSED */ 850 int 851 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 852 { 853 struct iso_node *ip = VTOI(vp); 854 struct ifid ifh; 855 856 if (*fh_size < sizeof(struct ifid)) { 857 *fh_size = sizeof(struct ifid); 858 return E2BIG; 859 } 860 *fh_size = sizeof(struct ifid); 861 862 memset(&ifh, 0, sizeof(ifh)); 863 ifh.ifid_len = sizeof(struct ifid); 864 ifh.ifid_ino = ip->i_number; 865 #ifdef ISOFS_DBG 866 ifh.ifid_start = ip->iso_start; 867 #endif 868 memcpy(fhp, &ifh, sizeof(ifh)); 869 870 #ifdef ISOFS_DBG 871 printf("vptofh: ino %"PRIu64", start %lu\n", 872 ifh.ifid_ino,ifh.ifid_start); 873 #endif 874 return 0; 875 } 876
Indexes created Sat Oct 18 23:09:54 GMT 2025