cd9660_vfsops.c revision 1.94
1 /* $NetBSD: cd9660_vfsops.c,v 1.94 2020/01/17 20:08:07 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 1.94 2020/01/17 20:08:07 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 #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 = genfs_suspendctl, 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); 195 vfs_rele(mp); 196 return (error); 197 } 198 mountlist_append(mp); 199 (void)cd9660_statvfs(mp, &mp->mnt_stat); 200 vfs_unbusy(mp); 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); 217 218 if (args == NULL) 219 return EINVAL; 220 if (*data_len < sizeof *args) 221 return EINVAL; 222 223 if (mp->mnt_flag & MNT_GETARGS) { 224 if (imp == NULL) 225 return EIO; 226 args->fspec = NULL; 227 args->flags = imp->im_flags; 228 *data_len = sizeof (*args); 229 return 0; 230 } 231 232 if ((mp->mnt_flag & MNT_RDONLY) == 0) 233 return (EROFS); 234 235 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 236 return EINVAL; 237 238 /* 239 * Not an update, or updating the name: look up the name 240 * and verify that it refers to a sensible block device. 241 */ 242 error = namei_simple_user(args->fspec, 243 NSM_FOLLOW_NOEMULROOT, &devvp); 244 if (error != 0) 245 return (error); 246 247 if (devvp->v_type != VBLK) { 248 vrele(devvp); 249 return ENOTBLK; 250 } 251 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 252 vrele(devvp); 253 return ENXIO; 254 } 255 /* 256 * If mount by non-root, then verify that user has necessary 257 * permissions on the device. 258 */ 259 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 260 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 261 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(VREAD)); 262 if (error) { 263 goto fail; 264 } 265 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 266 error = VOP_OPEN(devvp, FREAD, FSCRED); 267 if (error) 268 goto fail; 269 VOP_UNLOCK(devvp); 270 error = iso_mountfs(devvp, mp, l, args); 271 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 272 if (error) { 273 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 274 goto fail; 275 } 276 VOP_UNLOCK(devvp); 277 /* reference to devvp is donated through iso_mountfs */ 278 } else { 279 if (devvp != imp->im_devvp && 280 devvp->v_rdev != imp->im_devvp->v_rdev) { 281 error = EINVAL; /* needs translation */ 282 goto fail; 283 } 284 VOP_UNLOCK(devvp); 285 vrele(devvp); 286 } 287 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 288 mp->mnt_op->vfs_name, mp, l); 289 290 fail: 291 VOP_UNLOCK(devvp); 292 vrele(devvp); 293 return (error); 294 } 295 296 /* 297 * Make a mount point from a volume descriptor 298 */ 299 static int 300 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len) 301 { 302 struct iso_primary_descriptor *pri; 303 int logical_block_size; 304 struct iso_directory_record *rootp; 305 306 pri = (struct iso_primary_descriptor *)bp->b_data; 307 308 logical_block_size = isonum_723 (pri->logical_block_size); 309 310 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 311 || (logical_block_size & (logical_block_size - 1)) != 0) 312 return -1; 313 314 rootp = (struct iso_directory_record *)pri->root_directory_record; 315 316 isomp->logical_block_size = logical_block_size; 317 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 318 memcpy(isomp->root, rootp, sizeof(isomp->root)); 319 isomp->root_extent = isonum_733 (rootp->extent); 320 isomp->root_size = isonum_733 (rootp->size); 321 isomp->im_joliet_level = 0; 322 323 isomp->im_bmask = logical_block_size - 1; 324 isomp->im_bshift = 0; 325 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 326 isomp->im_bshift++; 327 328 if (ea_len != NULL) 329 *ea_len = isonum_711(rootp->ext_attr_length); 330 331 return 0; 332 } 333 334 /* 335 * Common code for mount and mountroot 336 */ 337 static int 338 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, 339 struct iso_args *argp) 340 { 341 struct iso_mnt *isomp = (struct iso_mnt *)0; 342 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 343 dev_t dev = devvp->v_rdev; 344 int error = EINVAL; 345 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 346 int iso_bsize; 347 int iso_blknum; 348 int joliet_level; 349 struct iso_volume_descriptor *vdp; 350 struct iso_supplementary_descriptor *sup; 351 int sess = 0; 352 int ext_attr_length; 353 struct disklabel label; 354 355 if (!ronly) 356 return EROFS; 357 358 /* Flush out any old buffers remaining from a previous use. */ 359 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 360 return (error); 361 362 /* This is the "logical sector size". The standard says this 363 * should be 2048 or the physical sector size on the device, 364 * whichever is greater. For now, we'll just use a constant. 365 */ 366 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 367 368 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 369 if (!error) { 370 /* XXX more sanity checks? */ 371 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 372 } else { 373 /* fallback to old method */ 374 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 375 if (error) 376 sess = 0; /* never mind */ 377 } 378 #ifdef ISO_DEBUG 379 printf("isofs: session offset (part %"PRId32") %d\n", DISKPART(dev), sess); 380 #endif 381 382 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 383 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 384 iso_bsize, 0, &bp)) != 0) 385 goto out; 386 387 vdp = (struct iso_volume_descriptor *)bp->b_data; 388 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 389 error = EINVAL; 390 goto out; 391 } 392 393 switch (isonum_711(vdp->type)) { 394 case ISO_VD_PRIMARY: 395 if (pribp == NULL) { 396 pribp = bp; 397 bp = NULL; 398 } 399 break; 400 401 case ISO_VD_SUPPLEMENTARY: 402 if (supbp == NULL) { 403 supbp = bp; 404 bp = NULL; 405 } 406 break; 407 408 default: 409 break; 410 } 411 412 if (isonum_711 (vdp->type) == ISO_VD_END) { 413 brelse(bp, 0); 414 bp = NULL; 415 break; 416 } 417 418 if (bp != NULL) { 419 brelse(bp, 0); 420 bp = NULL; 421 } 422 } 423 424 if (pribp == NULL) { 425 error = EINVAL; 426 goto out; 427 } 428 429 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 430 memset(isomp, 0, sizeof *isomp); 431 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 432 error = EINVAL; 433 goto out; 434 } 435 436 isomp->volume_space_size += sess; 437 438 brelse(pribp, BC_AGE); 439 pribp = NULL; 440 441 mp->mnt_data = isomp; 442 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 443 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 444 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 445 mp->mnt_stat.f_namemax = ISO_MAXNAMLEN; 446 mp->mnt_flag |= MNT_LOCAL; 447 mp->mnt_iflag |= IMNT_MPSAFE; 448 mp->mnt_dev_bshift = iso_bsize; 449 mp->mnt_fs_bshift = isomp->im_bshift; 450 isomp->im_mountp = mp; 451 isomp->im_dev = dev; 452 isomp->im_devvp = devvp; 453 454 /* Check the Rock Ridge Extension support */ 455 if (!(argp->flags & ISOFSMNT_NORRIP)) { 456 struct iso_directory_record *rootp; 457 458 if ((error = bread(isomp->im_devvp, 459 (isomp->root_extent + ext_attr_length) << 460 (isomp->im_bshift - DEV_BSHIFT), 461 isomp->logical_block_size, 462 0, &bp)) != 0) 463 goto out; 464 465 rootp = (struct iso_directory_record *)bp->b_data; 466 467 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 468 argp->flags |= ISOFSMNT_NORRIP; 469 } else { 470 argp->flags &= ~ISOFSMNT_GENS; 471 } 472 473 /* 474 * The contents are valid, 475 * but they will get reread as part of another vnode, so... 476 */ 477 brelse(bp, BC_AGE); 478 bp = NULL; 479 } 480 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 481 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 482 483 if (isomp->im_flags & ISOFSMNT_GENS) 484 isomp->iso_ftype = ISO_FTYPE_9660; 485 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 486 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 487 if (argp->flags & ISOFSMNT_NOCASETRANS) 488 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 489 } else 490 isomp->iso_ftype = ISO_FTYPE_RRIP; 491 492 /* Check the Joliet Extension support */ 493 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 494 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 495 supbp != NULL) { 496 joliet_level = 0; 497 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 498 499 if ((isonum_711(sup->flags) & 1) == 0) { 500 if (memcmp(sup->escape, "%/@", 3) == 0) 501 joliet_level = 1; 502 if (memcmp(sup->escape, "%/C", 3) == 0) 503 joliet_level = 2; 504 if (memcmp(sup->escape, "%/E", 3) == 0) 505 joliet_level = 3; 506 } 507 if (joliet_level != 0) { 508 if (iso_makemp(isomp, supbp, NULL) == -1) { 509 error = EINVAL; 510 goto out; 511 } 512 isomp->im_joliet_level = joliet_level; 513 } 514 } 515 516 if (supbp != NULL) { 517 brelse(supbp, 0); 518 supbp = NULL; 519 } 520 521 spec_node_setmountedfs(devvp, mp); 522 523 return 0; 524 out: 525 if (bp) 526 brelse(bp, 0); 527 if (pribp) 528 brelse(pribp, 0); 529 if (supbp) 530 brelse(supbp, 0); 531 if (isomp) { 532 free(isomp, M_ISOFSMNT); 533 mp->mnt_data = NULL; 534 } 535 return error; 536 } 537 538 /* 539 * Make a filesystem operational. 540 * Nothing to do at the moment. 541 */ 542 /* ARGSUSED */ 543 int 544 cd9660_start(struct mount *mp, int flags) 545 { 546 return 0; 547 } 548 549 /* 550 * unmount system call 551 */ 552 int 553 cd9660_unmount(struct mount *mp, int mntflags) 554 { 555 struct iso_mnt *isomp; 556 int error, flags = 0; 557 558 if (mntflags & MNT_FORCE) 559 flags |= FORCECLOSE; 560 if ((error = vflush(mp, NULLVP, flags)) != 0) 561 return (error); 562 563 isomp = VFSTOISOFS(mp); 564 565 if (isomp->im_devvp->v_type != VBAD) 566 spec_node_setmountedfs(isomp->im_devvp, NULL); 567 568 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 569 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 570 vput(isomp->im_devvp); 571 free(isomp, M_ISOFSMNT); 572 mp->mnt_data = NULL; 573 mp->mnt_flag &= ~MNT_LOCAL; 574 return (error); 575 } 576 577 /* 578 * Return root of a filesystem 579 */ 580 int 581 cd9660_root(struct mount *mp, int lktype, struct vnode **vpp) 582 { 583 struct iso_mnt *imp = VFSTOISOFS(mp); 584 struct iso_directory_record *dp = 585 (struct iso_directory_record *)imp->root; 586 ino_t ino = isodirino(dp, imp); 587 588 return cd9660_vget(mp, ino, lktype, vpp); 589 } 590 591 /* 592 * Get file system statistics. 593 */ 594 int 595 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 596 { 597 struct iso_mnt *isomp; 598 599 isomp = VFSTOISOFS(mp); 600 601 sbp->f_bsize = isomp->logical_block_size; 602 sbp->f_frsize = sbp->f_bsize; 603 sbp->f_iosize = sbp->f_bsize; /* XXX */ 604 sbp->f_blocks = isomp->volume_space_size; 605 sbp->f_bfree = 0; /* total free blocks */ 606 sbp->f_bavail = 0; /* blocks free for non superuser */ 607 sbp->f_bresvd = 0; /* total reserved blocks */ 608 sbp->f_files = 0; /* total files */ 609 sbp->f_ffree = 0; /* free file nodes */ 610 sbp->f_favail = 0; /* free file nodes for non superuser */ 611 sbp->f_fresvd = 0; /* reserved file nodes */ 612 copy_statvfs_info(sbp, mp); 613 /* Use the first spare for flags: */ 614 sbp->f_spare[0] = isomp->im_flags; 615 return 0; 616 } 617 618 /* ARGSUSED */ 619 int 620 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 621 { 622 return 0; 623 } 624 625 /* 626 * File handle to vnode 627 * 628 * Have to be really careful about stale file handles: 629 * - check that the inode number is in range 630 * - call iget() to get the locked inode 631 * - check for an unallocated inode (i_mode == 0) 632 * - check that the generation number matches 633 */ 634 635 struct ifid { 636 ushort ifid_len; 637 ushort ifid_pad; 638 ino_t ifid_ino; 639 #ifdef ISOFS_DBG 640 u_long ifid_start; 641 #endif 642 }; 643 644 /* ARGSUSED */ 645 int 646 cd9660_fhtovp(struct mount *mp, struct fid *fhp, int lktype, struct vnode **vpp) 647 { 648 struct ifid ifh; 649 struct iso_node *ip; 650 struct vnode *nvp; 651 int error; 652 653 if (fhp->fid_len != sizeof(ifh)) 654 return EINVAL; 655 656 memcpy(&ifh, fhp, sizeof(ifh)); 657 #ifdef ISOFS_DBG 658 printf("fhtovp: ino %"PRIu64", start %lu\n", 659 ifh.ifid_ino, ifh.ifid_start); 660 #endif 661 662 if ((error = VFS_VGET(mp, ifh.ifid_ino, lktype, &nvp)) != 0) { 663 *vpp = NULLVP; 664 return (error); 665 } 666 ip = VTOI(nvp); 667 if (ip->inode.iso_mode == 0) { 668 vput(nvp); 669 *vpp = NULLVP; 670 return (ESTALE); 671 } 672 *vpp = nvp; 673 return (0); 674 } 675 676 int 677 cd9660_vget(struct mount *mp, ino_t ino, int lktype, struct vnode **vpp) 678 { 679 int error; 680 681 error = vcache_get(mp, &ino, sizeof(ino), vpp); 682 if (error) 683 return error; 684 error = vn_lock(*vpp, lktype); 685 if (error) { 686 vrele(*vpp); 687 *vpp = NULL; 688 return error; 689 } 690 return 0; 691 } 692 693 int 694 cd9660_loadvnode(struct mount *mp, struct vnode *vp, 695 const void *key, size_t key_len, const void **new_key) 696 { 697 struct iso_mnt *imp; 698 struct iso_node *ip; 699 struct iso_directory_record *isodir; 700 struct buf *bp; 701 dev_t dev; 702 ino_t ino; 703 int lbn, off; 704 int error; 705 706 KASSERT(key_len == sizeof(ino)); 707 memcpy(&ino, key, key_len); 708 imp = VFSTOISOFS(mp); 709 dev = imp->im_dev; 710 711 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 712 713 memset(ip, 0, sizeof(struct iso_node)); 714 ip->i_vnode = vp; 715 ip->i_dev = dev; 716 ip->i_number = ino; 717 ip->i_mnt = imp; 718 ip->i_devvp = imp->im_devvp; 719 720 lbn = cd9660_lblkno(imp, ino); 721 if (lbn >= imp->volume_space_size) { 722 pool_put(&cd9660_node_pool, ip); 723 printf("fhtovp: lbn exceed volume space %d\n", lbn); 724 return (ESTALE); 725 } 726 727 off = cd9660_blkoff(imp, ino); 728 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 729 pool_put(&cd9660_node_pool, ip); 730 printf("fhtovp: crosses block boundary %d\n", 731 off + ISO_DIRECTORY_RECORD_SIZE); 732 return (ESTALE); 733 } 734 735 error = bread(imp->im_devvp, 736 lbn << (imp->im_bshift - DEV_BSHIFT), 737 imp->logical_block_size, 0, &bp); 738 if (error) { 739 pool_put(&cd9660_node_pool, ip); 740 printf("fhtovp: bread error %d\n",error); 741 return (error); 742 } 743 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 744 745 if (off + isonum_711(isodir->length) > imp->logical_block_size) { 746 pool_put(&cd9660_node_pool, ip); 747 brelse(bp, 0); 748 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 749 off +isonum_711(isodir->length), off, 750 isonum_711(isodir->length)); 751 return (ESTALE); 752 } 753 754 #if 0 755 if (isonum_733(isodir->extent) + 756 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 757 pool_put(&cd9660_node_pool, ip); 758 if (bp != 0) 759 brelse(bp, 0); 760 printf("fhtovp: file start miss %d vs %d\n", 761 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 762 ifhp->ifid_start); 763 return (ESTALE); 764 } 765 #endif 766 767 ip->iso_extent = isonum_733(isodir->extent); 768 ip->i_size = isonum_733(isodir->size); 769 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 770 771 vp->v_tag = VT_ISOFS; 772 vp->v_op = cd9660_vnodeop_p; 773 vp->v_data = ip; 774 genfs_node_init(vp, &cd9660_genfsops); 775 776 /* 777 * Setup time stamp, attribute 778 */ 779 switch (imp->iso_ftype) { 780 default: /* ISO_FTYPE_9660 */ 781 { 782 struct buf *bp2; 783 if ((imp->im_flags & ISOFSMNT_EXTATT) 784 && (off = isonum_711(isodir->ext_attr_length))) 785 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 786 NULL, &bp2); 787 else 788 bp2 = NULL; 789 cd9660_defattr(isodir, ip, bp2); 790 cd9660_deftstamp(isodir, ip, bp2); 791 if (bp2) 792 brelse(bp2, 0); 793 break; 794 } 795 case ISO_FTYPE_RRIP: 796 cd9660_rrip_analyze(isodir, ip, imp); 797 break; 798 } 799 800 brelse(bp, 0); 801 802 /* 803 * Initialize the associated vnode 804 */ 805 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 806 case VFIFO: 807 vp->v_op = cd9660_fifoop_p; 808 break; 809 case VCHR: 810 case VBLK: 811 /* 812 * if device, look at device number table for translation 813 */ 814 vp->v_op = cd9660_specop_p; 815 spec_node_init(vp, ip->inode.iso_rdev); 816 break; 817 case VLNK: 818 case VNON: 819 case VSOCK: 820 case VDIR: 821 case VBAD: 822 break; 823 case VREG: 824 uvm_vnp_setsize(vp, ip->i_size); 825 break; 826 } 827 828 if (vp->v_type != VREG) 829 uvm_vnp_setsize(vp, 0); 830 831 if (ip->iso_extent == imp->root_extent) 832 vp->v_vflag |= VV_ROOT; 833 834 /* 835 * XXX need generation number? 836 */ 837 838 *new_key = &ip->i_number; 839 return 0; 840 } 841 842 /* 843 * Vnode pointer to File handle 844 */ 845 /* ARGSUSED */ 846 int 847 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 848 { 849 struct iso_node *ip = VTOI(vp); 850 struct ifid ifh; 851 852 if (*fh_size < sizeof(struct ifid)) { 853 *fh_size = sizeof(struct ifid); 854 return E2BIG; 855 } 856 *fh_size = sizeof(struct ifid); 857 858 memset(&ifh, 0, sizeof(ifh)); 859 ifh.ifid_len = sizeof(struct ifid); 860 ifh.ifid_ino = ip->i_number; 861 #ifdef ISOFS_DBG 862 ifh.ifid_start = ip->iso_start; 863 #endif 864 memcpy(fhp, &ifh, sizeof(ifh)); 865 866 #ifdef ISOFS_DBG 867 printf("vptofh: ino %"PRIu64", start %lu\n", 868 ifh.ifid_ino,ifh.ifid_start); 869 #endif 870 return 0; 871 } 872
Indexes created Thu Sep 25 16:09:42 GMT 2025