1 /* $NetBSD: cd9660_vfsops.c,v 1.105 2025/02/16 18:38:58 joe 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 1.105 2025/02/16 18:38:58 joe 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 break; 162 case MODULE_CMD_FINI: 163 error = vfs_detach(&cd9660_vfsops); 164 break; 165 default: 166 error = ENOTTY; 167 break; 168 } 169 170 return (error); 171 } 172 173 /* Compat with pre uid/gid/fsize/dsize mount call */ 174 #define OSIZE sizeof(struct { \ 175 const char *fspec; \ 176 struct export_args30 _pad1; \ 177 int flags; \ 178 }) 179 180 static int 181 iso_checkupdate(const struct vnode *devvp, const struct iso_mnt *imp, 182 const struct iso_args *args) 183 { 184 185 if (devvp != imp->im_devvp && devvp->v_rdev != imp->im_devvp->v_rdev) 186 return EINVAL; 187 188 if (((imp->im_flags & ISOFSMNT_UID) && args->uid != imp->im_uid) || 189 ((imp->im_flags & ISOFSMNT_GID) && args->gid != imp->im_gid) || 190 args->fmask != imp->im_fmask || args->dmask != imp->im_dmask) 191 return EPERM; 192 193 return 0; 194 } 195 196 static void 197 iso_copyidmask(struct iso_args *args, const struct iso_mnt *imp) 198 { 199 200 if (imp == NULL) { 201 args->uid = args->gid = 0; 202 args->fmask = args->dmask = S_IRWXU|S_IRWXG|S_IRWXO; 203 return; 204 } 205 args->uid = imp->im_uid; 206 args->gid = imp->im_gid; 207 args->fmask = imp->im_fmask; 208 args->dmask = imp->im_dmask; 209 } 210 211 int 212 cd9660_mountroot(void) 213 { 214 struct mount *mp; 215 struct lwp *l = curlwp; 216 int error; 217 struct iso_args args; 218 219 if (device_class(root_device) != DV_DISK) 220 return (ENODEV); 221 222 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 223 != 0) { 224 vrele(rootvp); 225 return (error); 226 } 227 228 args.flags = ISOFSMNT_ROOT; 229 iso_copyidmask(&args, NULL); 230 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 231 vfs_unbusy(mp); 232 vfs_rele(mp); 233 return (error); 234 } 235 mountlist_append(mp); 236 (void)cd9660_statvfs(mp, &mp->mnt_stat); 237 vfs_unbusy(mp); 238 return (0); 239 } 240 241 242 /* 243 * VFS Operations. 244 * 245 * mount system call 246 */ 247 248 int 249 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 250 { 251 struct lwp *l = curlwp; 252 struct vnode *devvp; 253 struct iso_args aa, *args = data; 254 int error; 255 struct iso_mnt *imp = VFSTOISOFS(mp); 256 257 if (args == NULL) 258 return EINVAL; 259 260 if (*data_len != OSIZE && *data_len < sizeof(*args)) 261 return EINVAL; 262 263 if (mp->mnt_flag & MNT_GETARGS) { 264 if (imp == NULL) 265 return EIO; 266 267 args->fspec = NULL; 268 args->flags = imp->im_flags; 269 if (*data_len == OSIZE) 270 return 0; 271 272 iso_copyidmask(args, imp); 273 *data_len = sizeof(*args); 274 return 0; 275 } 276 277 if (*data_len == OSIZE) { 278 memcpy(&aa, args, OSIZE); 279 args = &aa; 280 iso_copyidmask(args, (mp->mnt_flag & MNT_UPDATE) ? imp : NULL); 281 } 282 283 if ((mp->mnt_flag & MNT_RDONLY) == 0) 284 return EROFS; 285 286 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 287 return EINVAL; 288 289 /* 290 * Not an update, or updating the name: look up the name 291 * and verify that it refers to a sensible block device. 292 */ 293 error = namei_simple_user(args->fspec, 294 NSM_FOLLOW_NOEMULROOT, &devvp); 295 if (error != 0) 296 return error; 297 298 if (devvp->v_type != VBLK) { 299 vrele(devvp); 300 return ENOTBLK; 301 } 302 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 303 vrele(devvp); 304 return ENXIO; 305 } 306 /* 307 * If mount by non-root, then verify that user has necessary 308 * permissions on the device. 309 */ 310 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 311 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 312 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(VREAD)); 313 if (error) { 314 goto fail; 315 } 316 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 317 error = VOP_OPEN(devvp, FREAD, FSCRED); 318 if (error) 319 goto fail; 320 VOP_UNLOCK(devvp); 321 error = iso_mountfs(devvp, mp, l, args); 322 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 323 if (error) { 324 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 325 goto fail; 326 } 327 VOP_UNLOCK(devvp); 328 /* reference to devvp is donated through iso_mountfs */ 329 } else { 330 if ((error = iso_checkupdate(devvp, imp, args)) != 0) 331 goto fail; 332 VOP_UNLOCK(devvp); 333 vrele(devvp); 334 } 335 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 336 mp->mnt_op->vfs_name, mp, l); 337 338 fail: 339 VOP_UNLOCK(devvp); 340 vrele(devvp); 341 return error; 342 } 343 344 /* 345 * Make a mount point from a volume descriptor 346 */ 347 static int 348 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len) 349 { 350 struct iso_primary_descriptor *pri; 351 int logical_block_size; 352 struct iso_directory_record *rootp; 353 354 pri = (struct iso_primary_descriptor *)bp->b_data; 355 356 logical_block_size = isonum_723 (pri->logical_block_size); 357 358 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 359 || (logical_block_size & (logical_block_size - 1)) != 0) 360 return -1; 361 362 rootp = (struct iso_directory_record *)pri->root_directory_record; 363 364 isomp->logical_block_size = logical_block_size; 365 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 366 memcpy(isomp->root, rootp, sizeof(isomp->root)); 367 isomp->root_extent = isonum_733 (rootp->extent); 368 isomp->root_size = isonum_733 (rootp->size); 369 isomp->im_joliet_level = 0; 370 371 isomp->im_bmask = logical_block_size - 1; 372 isomp->im_bshift = 0; 373 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 374 isomp->im_bshift++; 375 376 if (ea_len != NULL) 377 *ea_len = isonum_711(rootp->ext_attr_length); 378 379 return 0; 380 } 381 382 /* 383 * Common code for mount and mountroot 384 */ 385 static int 386 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, 387 struct iso_args *argp) 388 { 389 struct iso_mnt *isomp = (struct iso_mnt *)0; 390 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 391 dev_t dev = devvp->v_rdev; 392 int error = EINVAL; 393 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 394 int iso_bsize; 395 int iso_blknum; 396 int joliet_level; 397 struct iso_volume_descriptor *vdp; 398 struct iso_supplementary_descriptor *sup; 399 int sess = 0; 400 int ext_attr_length; 401 struct disklabel label; 402 403 if (!ronly) 404 return EROFS; 405 406 /* Flush out any old buffers remaining from a previous use. */ 407 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 408 error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0); 409 VOP_UNLOCK(devvp); 410 if (error != 0) 411 return (error); 412 413 /* This is the "logical sector size". The standard says this 414 * should be 2048 or the physical sector size on the device, 415 * whichever is greater. For now, we'll just use a constant. 416 */ 417 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 418 419 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 420 if (!error) { 421 /* XXX more sanity checks? */ 422 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 423 } else { 424 /* fallback to old method */ 425 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 426 if (error) 427 sess = 0; /* never mind */ 428 } 429 #ifdef ISO_DEBUG 430 printf("isofs: session offset (part %"PRId32") %d\n", DISKPART(dev), sess); 431 #endif 432 433 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 434 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 435 iso_bsize, 0, &bp)) != 0) 436 goto out; 437 438 vdp = (struct iso_volume_descriptor *)bp->b_data; 439 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 440 error = EINVAL; 441 goto out; 442 } 443 444 switch (isonum_711(vdp->type)) { 445 case ISO_VD_PRIMARY: 446 if (pribp == NULL) { 447 pribp = bp; 448 bp = NULL; 449 } 450 break; 451 452 case ISO_VD_SUPPLEMENTARY: 453 if (supbp == NULL) { 454 supbp = bp; 455 bp = NULL; 456 } 457 break; 458 459 default: 460 break; 461 } 462 463 if (isonum_711 (vdp->type) == ISO_VD_END) { 464 brelse(bp, 0); 465 bp = NULL; 466 break; 467 } 468 469 if (bp != NULL) { 470 brelse(bp, 0); 471 bp = NULL; 472 } 473 } 474 475 if (pribp == NULL) { 476 error = EINVAL; 477 goto out; 478 } 479 480 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 481 memset(isomp, 0, sizeof *isomp); 482 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 483 error = EINVAL; 484 goto out; 485 } 486 487 isomp->volume_space_size += sess; 488 489 brelse(pribp, BC_AGE); 490 pribp = NULL; 491 492 mp->mnt_data = isomp; 493 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 494 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 495 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 496 mp->mnt_stat.f_namemax = ISO_MAXNAMLEN; 497 mp->mnt_flag |= MNT_LOCAL; 498 mp->mnt_iflag |= IMNT_MPSAFE | IMNT_SHRLOOKUP; 499 mp->mnt_dev_bshift = iso_bsize; 500 mp->mnt_fs_bshift = isomp->im_bshift; 501 isomp->im_mountp = mp; 502 isomp->im_dev = dev; 503 isomp->im_devvp = devvp; 504 505 if (argp->flags & ISOFSMNT_UID) 506 isomp->im_uid = argp->uid; 507 if (argp->flags & ISOFSMNT_GID) 508 isomp->im_gid = argp->gid; 509 isomp->im_fmask = argp->fmask & ACCESSPERMS; 510 isomp->im_dmask = argp->dmask & ACCESSPERMS; 511 512 /* Check the Rock Ridge Extension support */ 513 if (!(argp->flags & ISOFSMNT_NORRIP)) { 514 struct iso_directory_record *rootp; 515 516 if ((error = bread(isomp->im_devvp, 517 (isomp->root_extent + ext_attr_length) << 518 (isomp->im_bshift - DEV_BSHIFT), 519 isomp->logical_block_size, 520 0, &bp)) != 0) 521 goto out; 522 523 rootp = (struct iso_directory_record *)bp->b_data; 524 525 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 526 argp->flags |= ISOFSMNT_NORRIP; 527 } else { 528 argp->flags &= ~ISOFSMNT_GENS; 529 } 530 531 /* 532 * The contents are valid, 533 * but they will get reread as part of another vnode, so... 534 */ 535 brelse(bp, BC_AGE); 536 bp = NULL; 537 } 538 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 539 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS | 540 ISOFSMNT_UID | ISOFSMNT_GID); 541 542 if (isomp->im_flags & ISOFSMNT_GENS) 543 isomp->iso_ftype = ISO_FTYPE_9660; 544 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 545 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 546 if (argp->flags & ISOFSMNT_NOCASETRANS) 547 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 548 } else 549 isomp->iso_ftype = ISO_FTYPE_RRIP; 550 551 /* Check the Joliet Extension support */ 552 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 553 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 554 supbp != NULL) { 555 joliet_level = 0; 556 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 557 558 if ((isonum_711(sup->flags) & 1) == 0) { 559 if (memcmp(sup->escape, "%/@", 3) == 0) 560 joliet_level = 1; 561 if (memcmp(sup->escape, "%/C", 3) == 0) 562 joliet_level = 2; 563 if (memcmp(sup->escape, "%/E", 3) == 0) 564 joliet_level = 3; 565 } 566 if (joliet_level != 0) { 567 if (iso_makemp(isomp, supbp, NULL) == -1) { 568 error = EINVAL; 569 goto out; 570 } 571 isomp->im_joliet_level = joliet_level; 572 } 573 } 574 575 if (supbp != NULL) { 576 brelse(supbp, 0); 577 supbp = NULL; 578 } 579 580 spec_node_setmountedfs(devvp, mp); 581 582 return 0; 583 out: 584 if (bp) 585 brelse(bp, 0); 586 if (pribp) 587 brelse(pribp, 0); 588 if (supbp) 589 brelse(supbp, 0); 590 if (isomp) { 591 free(isomp, M_ISOFSMNT); 592 mp->mnt_data = NULL; 593 } 594 return error; 595 } 596 597 /* 598 * Make a filesystem operational. 599 * Nothing to do at the moment. 600 */ 601 /* ARGSUSED */ 602 int 603 cd9660_start(struct mount *mp, int flags) 604 { 605 return 0; 606 } 607 608 /* 609 * unmount system call 610 */ 611 int 612 cd9660_unmount(struct mount *mp, int mntflags) 613 { 614 struct iso_mnt *isomp; 615 int error, flags = 0; 616 617 if (mntflags & MNT_FORCE) 618 flags |= FORCECLOSE; 619 if ((error = vflush(mp, NULLVP, flags)) != 0) 620 return (error); 621 622 isomp = VFSTOISOFS(mp); 623 624 if (isomp->im_devvp->v_type != VBAD) 625 spec_node_setmountedfs(isomp->im_devvp, NULL); 626 627 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 628 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 629 vput(isomp->im_devvp); 630 free(isomp, M_ISOFSMNT); 631 mp->mnt_data = NULL; 632 mp->mnt_flag &= ~MNT_LOCAL; 633 return (error); 634 } 635 636 /* 637 * Return root of a filesystem 638 */ 639 int 640 cd9660_root(struct mount *mp, int lktype, struct vnode **vpp) 641 { 642 struct iso_mnt *imp = VFSTOISOFS(mp); 643 struct iso_directory_record *dp = 644 (struct iso_directory_record *)imp->root; 645 ino_t ino = isodirino(dp, imp); 646 647 return cd9660_vget(mp, ino, lktype, vpp); 648 } 649 650 /* 651 * Get file system statistics. 652 */ 653 int 654 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 655 { 656 struct iso_mnt *isomp; 657 658 isomp = VFSTOISOFS(mp); 659 660 sbp->f_bsize = isomp->logical_block_size; 661 sbp->f_frsize = sbp->f_bsize; 662 sbp->f_iosize = sbp->f_bsize; /* XXX */ 663 sbp->f_blocks = isomp->volume_space_size; 664 sbp->f_bfree = 0; /* total free blocks */ 665 sbp->f_bavail = 0; /* blocks free for non superuser */ 666 sbp->f_bresvd = 0; /* total reserved blocks */ 667 sbp->f_files = 0; /* total files */ 668 sbp->f_ffree = 0; /* free file nodes */ 669 sbp->f_favail = 0; /* free file nodes for non superuser */ 670 sbp->f_fresvd = 0; /* reserved file nodes */ 671 copy_statvfs_info(sbp, mp); 672 /* Use the first spare for flags: */ 673 sbp->f_spare[0] = isomp->im_flags; 674 return 0; 675 } 676 677 /* ARGSUSED */ 678 int 679 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 680 { 681 return 0; 682 } 683 684 /* 685 * File handle to vnode 686 * 687 * Have to be really careful about stale file handles: 688 * - check that the inode number is in range 689 * - call iget() to get the locked inode 690 * - check for an unallocated inode (i_mode == 0) 691 * - check that the generation number matches 692 */ 693 694 struct ifid { 695 ushort ifid_len; 696 ushort ifid_pad; 697 ino_t ifid_ino; 698 #ifdef ISOFS_DBG 699 u_long ifid_start; 700 #endif 701 }; 702 703 /* ARGSUSED */ 704 int 705 cd9660_fhtovp(struct mount *mp, struct fid *fhp, int lktype, struct vnode **vpp) 706 { 707 struct ifid ifh; 708 struct iso_node *ip; 709 struct vnode *nvp; 710 int error; 711 712 if (fhp->fid_len != sizeof(ifh)) 713 return EINVAL; 714 715 memcpy(&ifh, fhp, sizeof(ifh)); 716 #ifdef ISOFS_DBG 717 printf("fhtovp: ino %"PRIu64", start %lu\n", 718 ifh.ifid_ino, ifh.ifid_start); 719 #endif 720 721 if ((error = VFS_VGET(mp, ifh.ifid_ino, lktype, &nvp)) != 0) { 722 *vpp = NULLVP; 723 return (error); 724 } 725 ip = VTOI(nvp); 726 if (ip->inode.iso_mode == 0) { 727 vput(nvp); 728 *vpp = NULLVP; 729 return (ESTALE); 730 } 731 *vpp = nvp; 732 return (0); 733 } 734 735 int 736 cd9660_vget(struct mount *mp, ino_t ino, int lktype, struct vnode **vpp) 737 { 738 int error; 739 740 error = vcache_get(mp, &ino, sizeof(ino), vpp); 741 if (error) 742 return error; 743 error = vn_lock(*vpp, lktype); 744 if (error) { 745 vrele(*vpp); 746 *vpp = NULL; 747 return error; 748 } 749 return 0; 750 } 751 752 int 753 cd9660_loadvnode(struct mount *mp, struct vnode *vp, 754 const void *key, size_t key_len, const void **new_key) 755 { 756 struct iso_mnt *imp; 757 struct iso_node *ip; 758 struct iso_directory_record *isodir; 759 struct buf *bp; 760 dev_t dev; 761 ino_t ino; 762 int lbn, off; 763 int error; 764 765 KASSERT(key_len == sizeof(ino)); 766 memcpy(&ino, key, key_len); 767 imp = VFSTOISOFS(mp); 768 dev = imp->im_dev; 769 770 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 771 772 memset(ip, 0, sizeof(struct iso_node)); 773 ip->i_vnode = vp; 774 ip->i_dev = dev; 775 ip->i_number = ino; 776 ip->i_mnt = imp; 777 ip->i_devvp = imp->im_devvp; 778 779 lbn = cd9660_lblkno(imp, ino); 780 if (lbn >= imp->volume_space_size) { 781 pool_put(&cd9660_node_pool, ip); 782 printf("fhtovp: lbn exceed volume space %d\n", lbn); 783 return (ESTALE); 784 } 785 786 off = cd9660_blkoff(imp, ino); 787 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 788 pool_put(&cd9660_node_pool, ip); 789 printf("fhtovp: crosses block boundary %d\n", 790 off + ISO_DIRECTORY_RECORD_SIZE); 791 return (ESTALE); 792 } 793 794 error = bread(imp->im_devvp, 795 lbn << (imp->im_bshift - DEV_BSHIFT), 796 imp->logical_block_size, 0, &bp); 797 if (error) { 798 pool_put(&cd9660_node_pool, ip); 799 printf("fhtovp: bread error %d\n",error); 800 return (error); 801 } 802 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 803 804 if (off + isonum_711(isodir->length) > imp->logical_block_size) { 805 pool_put(&cd9660_node_pool, ip); 806 brelse(bp, 0); 807 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 808 off +isonum_711(isodir->length), off, 809 isonum_711(isodir->length)); 810 return (ESTALE); 811 } 812 813 #if 0 814 if (isonum_733(isodir->extent) + 815 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 816 pool_put(&cd9660_node_pool, ip); 817 if (bp != 0) 818 brelse(bp, 0); 819 printf("fhtovp: file start miss %d vs %d\n", 820 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 821 ifhp->ifid_start); 822 return (ESTALE); 823 } 824 #endif 825 826 ip->iso_extent = isonum_733(isodir->extent); 827 ip->i_size = isonum_733(isodir->size); 828 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 829 830 vp->v_tag = VT_ISOFS; 831 vp->v_op = cd9660_vnodeop_p; 832 vp->v_data = ip; 833 genfs_node_init(vp, &cd9660_genfsops); 834 835 /* 836 * Setup time stamp, attribute 837 */ 838 switch (imp->iso_ftype) { 839 default: /* ISO_FTYPE_9660 */ 840 { 841 struct buf *bp2; 842 if ((imp->im_flags & ISOFSMNT_EXTATT) 843 && (off = isonum_711(isodir->ext_attr_length))) 844 cd9660_blkatoff(vp, -((off_t) off << imp->im_bshift), 845 NULL, &bp2); 846 else 847 bp2 = NULL; 848 cd9660_defattr(isodir, ip, bp2); 849 cd9660_deftstamp(isodir, ip, bp2); 850 if (bp2) 851 brelse(bp2, 0); 852 break; 853 } 854 case ISO_FTYPE_RRIP: 855 cd9660_rrip_analyze(isodir, ip, imp); 856 break; 857 } 858 859 brelse(bp, 0); 860 861 /* 862 * Initialize the associated vnode 863 */ 864 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 865 case VFIFO: 866 vp->v_op = cd9660_fifoop_p; 867 break; 868 case VCHR: 869 case VBLK: 870 /* 871 * if device, look at device number table for translation 872 */ 873 vp->v_op = cd9660_specop_p; 874 spec_node_init(vp, ip->inode.iso_rdev); 875 break; 876 case VLNK: 877 case VNON: 878 case VSOCK: 879 case VDIR: 880 case VBAD: 881 break; 882 case VREG: 883 uvm_vnp_setsize(vp, ip->i_size); 884 break; 885 } 886 887 if (vp->v_type != VREG) 888 uvm_vnp_setsize(vp, 0); 889 890 if (ip->iso_extent == imp->root_extent) 891 vp->v_vflag |= VV_ROOT; 892 893 /* 894 * XXX need generation number? 895 */ 896 897 *new_key = &ip->i_number; 898 return 0; 899 } 900 901 /* 902 * Vnode pointer to File handle 903 */ 904 /* ARGSUSED */ 905 int 906 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 907 { 908 struct iso_node *ip = VTOI(vp); 909 struct ifid ifh; 910 911 if (*fh_size < sizeof(struct ifid)) { 912 *fh_size = sizeof(struct ifid); 913 return E2BIG; 914 } 915 *fh_size = sizeof(struct ifid); 916 917 memset(&ifh, 0, sizeof(ifh)); 918 ifh.ifid_len = sizeof(struct ifid); 919 ifh.ifid_ino = ip->i_number; 920 #ifdef ISOFS_DBG 921 ifh.ifid_start = ip->iso_start; 922 #endif 923 memcpy(fhp, &ifh, sizeof(ifh)); 924 925 #ifdef ISOFS_DBG 926 printf("vptofh: ino %"PRIu64", start %lu\n", 927 ifh.ifid_ino,ifh.ifid_start); 928 #endif 929 return 0; 930 } 931
Indexes created Sun Sep 21 20:09:37 GMT 2025