cd9660_vfsops.c revision 1.98
1 /* $NetBSD: cd9660_vfsops.c,v 1.98 2024/02/02 20:27:26 christos 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 1.98 2024/02/02 20:27:26 christos 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 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 82 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 83 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 84 85 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 86 &cd9660_vnodeop_opv_desc, 87 &cd9660_specop_opv_desc, 88 &cd9660_fifoop_opv_desc, 89 NULL, 90 }; 91 92 struct vfsops cd9660_vfsops = { 93 .vfs_name = MOUNT_CD9660, 94 .vfs_min_mount_data = sizeof (struct iso_args), 95 .vfs_mount = cd9660_mount, 96 .vfs_start = cd9660_start, 97 .vfs_unmount = cd9660_unmount, 98 .vfs_root = cd9660_root, 99 .vfs_quotactl = (void *)eopnotsupp, 100 .vfs_statvfs = cd9660_statvfs, 101 .vfs_sync = cd9660_sync, 102 .vfs_vget = cd9660_vget, 103 .vfs_loadvnode = cd9660_loadvnode, 104 .vfs_fhtovp = cd9660_fhtovp, 105 .vfs_vptofh = cd9660_vptofh, 106 .vfs_init = cd9660_init, 107 .vfs_reinit = cd9660_reinit, 108 .vfs_done = cd9660_done, 109 .vfs_mountroot = cd9660_mountroot, 110 .vfs_snapshot = (void *)eopnotsupp, 111 .vfs_extattrctl = vfs_stdextattrctl, 112 .vfs_suspendctl = genfs_suspendctl, 113 .vfs_renamelock_enter = genfs_renamelock_enter, 114 .vfs_renamelock_exit = genfs_renamelock_exit, 115 .vfs_fsync = (void *)eopnotsupp, 116 .vfs_opv_descs = cd9660_vnodeopv_descs 117 }; 118 119 static const struct genfs_ops cd9660_genfsops = { 120 .gop_size = genfs_size, 121 }; 122 123 /* 124 * Called by vfs_mountroot when iso is going to be mounted as root. 125 * 126 * Name is updated by mount(8) after booting. 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 SYSCTL_SETUP(cd9660_sysctl_setup, "cd9660 sysctl") 133 { 134 135 sysctl_createv(clog, 0, NULL, NULL, 136 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 137 SYSCTL_DESCR("ISO-9660 file system"), 138 NULL, 0, NULL, 0, 139 CTL_VFS, 14, CTL_EOL); 140 sysctl_createv(clog, 0, NULL, NULL, 141 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 142 CTLTYPE_INT, "utf8_joliet", 143 SYSCTL_DESCR("Encode Joliet filenames to UTF-8"), 144 NULL, 0, &cd9660_utf8_joliet, 0, 145 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 146 /* 147 * XXX the "14" above could be dynamic, thereby eliminating 148 * one more instance of the "number to vfs" mapping problem, 149 * but "14" is the order as taken from sys/mount.h 150 */ 151 } 152 153 static int 154 cd9660_modcmd(modcmd_t cmd, void *arg) 155 { 156 int error; 157 158 switch (cmd) { 159 case MODULE_CMD_INIT: 160 error = vfs_attach(&cd9660_vfsops); 161 if (error != 0) 162 break; 163 break; 164 case MODULE_CMD_FINI: 165 error = vfs_detach(&cd9660_vfsops); 166 if (error != 0) 167 break; 168 break; 169 default: 170 error = ENOTTY; 171 break; 172 } 173 174 return (error); 175 } 176 177 int 178 cd9660_mountroot(void) 179 { 180 struct mount *mp; 181 struct lwp *l = curlwp; 182 int error; 183 struct iso_args args; 184 185 if (device_class(root_device) != DV_DISK) 186 return (ENODEV); 187 188 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 189 != 0) { 190 vrele(rootvp); 191 return (error); 192 } 193 194 args.flags = ISOFSMNT_ROOT; 195 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 196 vfs_unbusy(mp); 197 vfs_rele(mp); 198 return (error); 199 } 200 mountlist_append(mp); 201 (void)cd9660_statvfs(mp, &mp->mnt_stat); 202 vfs_unbusy(mp); 203 return (0); 204 } 205 206 /* 207 * VFS Operations. 208 * 209 * mount system call 210 */ 211 int 212 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 213 { 214 struct lwp *l = curlwp; 215 struct vnode *devvp; 216 struct iso_args *args = data; 217 int error; 218 struct iso_mnt *imp = VFSTOISOFS(mp); 219 220 if (args == NULL) 221 return EINVAL; 222 if (*data_len < sizeof *args) 223 return EINVAL; 224 225 if (mp->mnt_flag & MNT_GETARGS) { 226 if (imp == NULL) 227 return EIO; 228 args->fspec = NULL; 229 args->flags = imp->im_flags; 230 *data_len = sizeof (*args); 231 return 0; 232 } 233 234 if ((mp->mnt_flag & MNT_RDONLY) == 0) 235 return (EROFS); 236 237 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 238 return EINVAL; 239 240 /* 241 * Not an update, or updating the name: look up the name 242 * and verify that it refers to a sensible block device. 243 */ 244 error = namei_simple_user(args->fspec, 245 NSM_FOLLOW_NOEMULROOT, &devvp); 246 if (error != 0) 247 return (error); 248 249 if (devvp->v_type != VBLK) { 250 vrele(devvp); 251 return ENOTBLK; 252 } 253 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 254 vrele(devvp); 255 return ENXIO; 256 } 257 /* 258 * If mount by non-root, then verify that user has necessary 259 * permissions on the device. 260 */ 261 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 262 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 263 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(VREAD)); 264 if (error) { 265 goto fail; 266 } 267 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 268 error = VOP_OPEN(devvp, FREAD, FSCRED); 269 if (error) 270 goto fail; 271 VOP_UNLOCK(devvp); 272 error = iso_mountfs(devvp, mp, l, args); 273 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 274 if (error) { 275 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 276 goto fail; 277 } 278 VOP_UNLOCK(devvp); 279 /* reference to devvp is donated through iso_mountfs */ 280 } else { 281 if (devvp != imp->im_devvp && 282 devvp->v_rdev != imp->im_devvp->v_rdev) { 283 error = EINVAL; /* needs translation */ 284 goto fail; 285 } 286 VOP_UNLOCK(devvp); 287 vrele(devvp); 288 } 289 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 290 mp->mnt_op->vfs_name, mp, l); 291 292 fail: 293 VOP_UNLOCK(devvp); 294 vrele(devvp); 295 return (error); 296 } 297 298 /* 299 * Make a mount point from a volume descriptor 300 */ 301 static int 302 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len) 303 { 304 struct iso_primary_descriptor *pri; 305 int logical_block_size; 306 struct iso_directory_record *rootp; 307 308 pri = (struct iso_primary_descriptor *)bp->b_data; 309 310 logical_block_size = isonum_723 (pri->logical_block_size); 311 312 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 313 || (logical_block_size & (logical_block_size - 1)) != 0) 314 return -1; 315 316 rootp = (struct iso_directory_record *)pri->root_directory_record; 317 318 isomp->logical_block_size = logical_block_size; 319 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 320 memcpy(isomp->root, rootp, sizeof(isomp->root)); 321 isomp->root_extent = isonum_733 (rootp->extent); 322 isomp->root_size = isonum_733 (rootp->size); 323 isomp->im_joliet_level = 0; 324 325 isomp->im_bmask = logical_block_size - 1; 326 isomp->im_bshift = 0; 327 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 328 isomp->im_bshift++; 329 330 if (ea_len != NULL) 331 *ea_len = isonum_711(rootp->ext_attr_length); 332 333 return 0; 334 } 335 336 /* 337 * Common code for mount and mountroot 338 */ 339 static int 340 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, 341 struct iso_args *argp) 342 { 343 struct iso_mnt *isomp = (struct iso_mnt *)0; 344 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 345 dev_t dev = devvp->v_rdev; 346 int error = EINVAL; 347 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 348 int iso_bsize; 349 int iso_blknum; 350 int joliet_level; 351 struct iso_volume_descriptor *vdp; 352 struct iso_supplementary_descriptor *sup; 353 int sess = 0; 354 int ext_attr_length; 355 struct disklabel label; 356 357 if (!ronly) 358 return EROFS; 359 360 /* Flush out any old buffers remaining from a previous use. */ 361 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 362 error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0); 363 VOP_UNLOCK(devvp); 364 if (error != 0) 365 return (error); 366 367 /* This is the "logical sector size". The standard says this 368 * should be 2048 or the physical sector size on the device, 369 * whichever is greater. For now, we'll just use a constant. 370 */ 371 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 372 373 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 374 if (!error) { 375 /* XXX more sanity checks? */ 376 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 377 } else { 378 /* fallback to old method */ 379 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 380 if (error) 381 sess = 0; /* never mind */ 382 } 383 #ifdef ISO_DEBUG 384 printf("isofs: session offset (part %"PRId32") %d\n", DISKPART(dev), sess); 385 #endif 386 387 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 388 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 389 iso_bsize, 0, &bp)) != 0) 390 goto out; 391 392 vdp = (struct iso_volume_descriptor *)bp->b_data; 393 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 394 error = EINVAL; 395 goto out; 396 } 397 398 switch (isonum_711(vdp->type)) { 399 case ISO_VD_PRIMARY: 400 if (pribp == NULL) { 401 pribp = bp; 402 bp = NULL; 403 } 404 break; 405 406 case ISO_VD_SUPPLEMENTARY: 407 if (supbp == NULL) { 408 supbp = bp; 409 bp = NULL; 410 } 411 break; 412 413 default: 414 break; 415 } 416 417 if (isonum_711 (vdp->type) == ISO_VD_END) { 418 brelse(bp, 0); 419 bp = NULL; 420 break; 421 } 422 423 if (bp != NULL) { 424 brelse(bp, 0); 425 bp = NULL; 426 } 427 } 428 429 if (pribp == NULL) { 430 error = EINVAL; 431 goto out; 432 } 433 434 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 435 memset(isomp, 0, sizeof *isomp); 436 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 437 error = EINVAL; 438 goto out; 439 } 440 441 isomp->volume_space_size += sess; 442 443 brelse(pribp, BC_AGE); 444 pribp = NULL; 445 446 mp->mnt_data = isomp; 447 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 448 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 449 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 450 mp->mnt_stat.f_namemax = ISO_MAXNAMLEN; 451 mp->mnt_flag |= MNT_LOCAL; 452 mp->mnt_iflag |= IMNT_MPSAFE | IMNT_SHRLOOKUP; 453 mp->mnt_dev_bshift = iso_bsize; 454 mp->mnt_fs_bshift = isomp->im_bshift; 455 isomp->im_mountp = mp; 456 isomp->im_dev = dev; 457 isomp->im_devvp = devvp; 458 459 if (argp->flags & ISOFSMNT_UID) 460 isomp->im_uid = argp->uid; 461 if (argp->flags & ISOFSMNT_GID) 462 isomp->im_gid = argp->gid; 463 isomp->im_fmask = argp->fmask & ACCESSPERMS; 464 isomp->im_dmask = argp->dmask & ACCESSPERMS; 465 466 /* Check the Rock Ridge Extension support */ 467 if (!(argp->flags & ISOFSMNT_NORRIP)) { 468 struct iso_directory_record *rootp; 469 470 if ((error = bread(isomp->im_devvp, 471 (isomp->root_extent + ext_attr_length) << 472 (isomp->im_bshift - DEV_BSHIFT), 473 isomp->logical_block_size, 474 0, &bp)) != 0) 475 goto out; 476 477 rootp = (struct iso_directory_record *)bp->b_data; 478 479 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 480 argp->flags |= ISOFSMNT_NORRIP; 481 } else { 482 argp->flags &= ~ISOFSMNT_GENS; 483 } 484 485 /* 486 * The contents are valid, 487 * but they will get reread as part of another vnode, so... 488 */ 489 brelse(bp, BC_AGE); 490 bp = NULL; 491 } 492 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 493 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS | 494 ISOFSMNT_UID | ISOFSMNT_GID); 495 496 if (isomp->im_flags & ISOFSMNT_GENS) 497 isomp->iso_ftype = ISO_FTYPE_9660; 498 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 499 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 500 if (argp->flags & ISOFSMNT_NOCASETRANS) 501 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 502 } else 503 isomp->iso_ftype = ISO_FTYPE_RRIP; 504 505 /* Check the Joliet Extension support */ 506 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 507 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 508 supbp != NULL) { 509 joliet_level = 0; 510 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 511 512 if ((isonum_711(sup->flags) & 1) == 0) { 513 if (memcmp(sup->escape, "%/@", 3) == 0) 514 joliet_level = 1; 515 if (memcmp(sup->escape, "%/C", 3) == 0) 516 joliet_level = 2; 517 if (memcmp(sup->escape, "%/E", 3) == 0) 518 joliet_level = 3; 519 } 520 if (joliet_level != 0) { 521 if (iso_makemp(isomp, supbp, NULL) == -1) { 522 error = EINVAL; 523 goto out; 524 } 525 isomp->im_joliet_level = joliet_level; 526 } 527 } 528 529 if (supbp != NULL) { 530 brelse(supbp, 0); 531 supbp = NULL; 532 } 533 534 spec_node_setmountedfs(devvp, mp); 535 536 return 0; 537 out: 538 if (bp) 539 brelse(bp, 0); 540 if (pribp) 541 brelse(pribp, 0); 542 if (supbp) 543 brelse(supbp, 0); 544 if (isomp) { 545 free(isomp, M_ISOFSMNT); 546 mp->mnt_data = NULL; 547 } 548 return error; 549 } 550 551 /* 552 * Make a filesystem operational. 553 * Nothing to do at the moment. 554 */ 555 /* ARGSUSED */ 556 int 557 cd9660_start(struct mount *mp, int flags) 558 { 559 return 0; 560 } 561 562 /* 563 * unmount system call 564 */ 565 int 566 cd9660_unmount(struct mount *mp, int mntflags) 567 { 568 struct iso_mnt *isomp; 569 int error, flags = 0; 570 571 if (mntflags & MNT_FORCE) 572 flags |= FORCECLOSE; 573 if ((error = vflush(mp, NULLVP, flags)) != 0) 574 return (error); 575 576 isomp = VFSTOISOFS(mp); 577 578 if (isomp->im_devvp->v_type != VBAD) 579 spec_node_setmountedfs(isomp->im_devvp, NULL); 580 581 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 582 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 583 vput(isomp->im_devvp); 584 free(isomp, M_ISOFSMNT); 585 mp->mnt_data = NULL; 586 mp->mnt_flag &= ~MNT_LOCAL; 587 return (error); 588 } 589 590 /* 591 * Return root of a filesystem 592 */ 593 int 594 cd9660_root(struct mount *mp, int lktype, struct vnode **vpp) 595 { 596 struct iso_mnt *imp = VFSTOISOFS(mp); 597 struct iso_directory_record *dp = 598 (struct iso_directory_record *)imp->root; 599 ino_t ino = isodirino(dp, imp); 600 601 return cd9660_vget(mp, ino, lktype, vpp); 602 } 603 604 /* 605 * Get file system statistics. 606 */ 607 int 608 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 609 { 610 struct iso_mnt *isomp; 611 612 isomp = VFSTOISOFS(mp); 613 614 sbp->f_bsize = isomp->logical_block_size; 615 sbp->f_frsize = sbp->f_bsize; 616 sbp->f_iosize = sbp->f_bsize; /* XXX */ 617 sbp->f_blocks = isomp->volume_space_size; 618 sbp->f_bfree = 0; /* total free blocks */ 619 sbp->f_bavail = 0; /* blocks free for non superuser */ 620 sbp->f_bresvd = 0; /* total reserved blocks */ 621 sbp->f_files = 0; /* total files */ 622 sbp->f_ffree = 0; /* free file nodes */ 623 sbp->f_favail = 0; /* free file nodes for non superuser */ 624 sbp->f_fresvd = 0; /* reserved file nodes */ 625 copy_statvfs_info(sbp, mp); 626 /* Use the first spare for flags: */ 627 sbp->f_spare[0] = isomp->im_flags; 628 return 0; 629 } 630 631 /* ARGSUSED */ 632 int 633 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 634 { 635 return 0; 636 } 637 638 /* 639 * File handle to vnode 640 * 641 * Have to be really careful about stale file handles: 642 * - check that the inode number is in range 643 * - call iget() to get the locked inode 644 * - check for an unallocated inode (i_mode == 0) 645 * - check that the generation number matches 646 */ 647 648 struct ifid { 649 ushort ifid_len; 650 ushort ifid_pad; 651 ino_t ifid_ino; 652 #ifdef ISOFS_DBG 653 u_long ifid_start; 654 #endif 655 }; 656 657 /* ARGSUSED */ 658 int 659 cd9660_fhtovp(struct mount *mp, struct fid *fhp, int lktype, struct vnode **vpp) 660 { 661 struct ifid ifh; 662 struct iso_node *ip; 663 struct vnode *nvp; 664 int error; 665 666 if (fhp->fid_len != sizeof(ifh)) 667 return EINVAL; 668 669 memcpy(&ifh, fhp, sizeof(ifh)); 670 #ifdef ISOFS_DBG 671 printf("fhtovp: ino %"PRIu64", start %lu\n", 672 ifh.ifid_ino, ifh.ifid_start); 673 #endif 674 675 if ((error = VFS_VGET(mp, ifh.ifid_ino, lktype, &nvp)) != 0) { 676 *vpp = NULLVP; 677 return (error); 678 } 679 ip = VTOI(nvp); 680 if (ip->inode.iso_mode == 0) { 681 vput(nvp); 682 *vpp = NULLVP; 683 return (ESTALE); 684 } 685 *vpp = nvp; 686 return (0); 687 } 688 689 int 690 cd9660_vget(struct mount *mp, ino_t ino, int lktype, struct vnode **vpp) 691 { 692 int error; 693 694 error = vcache_get(mp, &ino, sizeof(ino), vpp); 695 if (error) 696 return error; 697 error = vn_lock(*vpp, lktype); 698 if (error) { 699 vrele(*vpp); 700 *vpp = NULL; 701 return error; 702 } 703 return 0; 704 } 705 706 int 707 cd9660_loadvnode(struct mount *mp, struct vnode *vp, 708 const void *key, size_t key_len, const void **new_key) 709 { 710 struct iso_mnt *imp; 711 struct iso_node *ip; 712 struct iso_directory_record *isodir; 713 struct buf *bp; 714 dev_t dev; 715 ino_t ino; 716 int lbn, off; 717 int error; 718 719 KASSERT(key_len == sizeof(ino)); 720 memcpy(&ino, key, key_len); 721 imp = VFSTOISOFS(mp); 722 dev = imp->im_dev; 723 724 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 725 726 memset(ip, 0, sizeof(struct iso_node)); 727 ip->i_vnode = vp; 728 ip->i_dev = dev; 729 ip->i_number = ino; 730 ip->i_mnt = imp; 731 ip->i_devvp = imp->im_devvp; 732 733 lbn = cd9660_lblkno(imp, ino); 734 if (lbn >= imp->volume_space_size) { 735 pool_put(&cd9660_node_pool, ip); 736 printf("fhtovp: lbn exceed volume space %d\n", lbn); 737 return (ESTALE); 738 } 739 740 off = cd9660_blkoff(imp, ino); 741 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 742 pool_put(&cd9660_node_pool, ip); 743 printf("fhtovp: crosses block boundary %d\n", 744 off + ISO_DIRECTORY_RECORD_SIZE); 745 return (ESTALE); 746 } 747 748 error = bread(imp->im_devvp, 749 lbn << (imp->im_bshift - DEV_BSHIFT), 750 imp->logical_block_size, 0, &bp); 751 if (error) { 752 pool_put(&cd9660_node_pool, ip); 753 printf("fhtovp: bread error %d\n",error); 754 return (error); 755 } 756 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 757 758 if (off + isonum_711(isodir->length) > imp->logical_block_size) { 759 pool_put(&cd9660_node_pool, ip); 760 brelse(bp, 0); 761 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 762 off +isonum_711(isodir->length), off, 763 isonum_711(isodir->length)); 764 return (ESTALE); 765 } 766 767 #if 0 768 if (isonum_733(isodir->extent) + 769 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 770 pool_put(&cd9660_node_pool, ip); 771 if (bp != 0) 772 brelse(bp, 0); 773 printf("fhtovp: file start miss %d vs %d\n", 774 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 775 ifhp->ifid_start); 776 return (ESTALE); 777 } 778 #endif 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 vp->v_tag = VT_ISOFS; 785 vp->v_op = cd9660_vnodeop_p; 786 vp->v_data = ip; 787 genfs_node_init(vp, &cd9660_genfsops); 788 789 /* 790 * Setup time stamp, attribute 791 */ 792 switch (imp->iso_ftype) { 793 default: /* ISO_FTYPE_9660 */ 794 { 795 struct buf *bp2; 796 if ((imp->im_flags & ISOFSMNT_EXTATT) 797 && (off = isonum_711(isodir->ext_attr_length))) 798 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 799 NULL, &bp2); 800 else 801 bp2 = NULL; 802 cd9660_defattr(isodir, ip, bp2); 803 cd9660_deftstamp(isodir, ip, bp2); 804 if (bp2) 805 brelse(bp2, 0); 806 break; 807 } 808 case ISO_FTYPE_RRIP: 809 cd9660_rrip_analyze(isodir, ip, imp); 810 break; 811 } 812 813 brelse(bp, 0); 814 815 /* 816 * Initialize the associated vnode 817 */ 818 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 819 case VFIFO: 820 vp->v_op = cd9660_fifoop_p; 821 break; 822 case VCHR: 823 case VBLK: 824 /* 825 * if device, look at device number table for translation 826 */ 827 vp->v_op = cd9660_specop_p; 828 spec_node_init(vp, ip->inode.iso_rdev); 829 break; 830 case VLNK: 831 case VNON: 832 case VSOCK: 833 case VDIR: 834 case VBAD: 835 break; 836 case VREG: 837 uvm_vnp_setsize(vp, ip->i_size); 838 break; 839 } 840 841 if (vp->v_type != VREG) 842 uvm_vnp_setsize(vp, 0); 843 844 if (ip->iso_extent == imp->root_extent) 845 vp->v_vflag |= VV_ROOT; 846 847 /* 848 * XXX need generation number? 849 */ 850 851 *new_key = &ip->i_number; 852 return 0; 853 } 854 855 /* 856 * Vnode pointer to File handle 857 */ 858 /* ARGSUSED */ 859 int 860 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 861 { 862 struct iso_node *ip = VTOI(vp); 863 struct ifid ifh; 864 865 if (*fh_size < sizeof(struct ifid)) { 866 *fh_size = sizeof(struct ifid); 867 return E2BIG; 868 } 869 *fh_size = sizeof(struct ifid); 870 871 memset(&ifh, 0, sizeof(ifh)); 872 ifh.ifid_len = sizeof(struct ifid); 873 ifh.ifid_ino = ip->i_number; 874 #ifdef ISOFS_DBG 875 ifh.ifid_start = ip->iso_start; 876 #endif 877 memcpy(fhp, &ifh, sizeof(ifh)); 878 879 #ifdef ISOFS_DBG 880 printf("vptofh: ino %"PRIu64", start %lu\n", 881 ifh.ifid_ino,ifh.ifid_start); 882 #endif 883 return 0; 884 } 885
Indexes created Sat Sep 27 14:09:57 GMT 2025