cd9660_vfsops.c revision 1.99
1 /* $NetBSD: cd9660_vfsops.c,v 1.99 2024/02/03 15:26:35 hannken 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 1.99 2024/02/03 15:26:35 hannken 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 args.fmask = S_IRWXU|S_IRWXG|S_IRWXO; 196 args.dmask = S_IRWXU|S_IRWXG|S_IRWXO; 197 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 198 vfs_unbusy(mp); 199 vfs_rele(mp); 200 return (error); 201 } 202 mountlist_append(mp); 203 (void)cd9660_statvfs(mp, &mp->mnt_stat); 204 vfs_unbusy(mp); 205 return (0); 206 } 207 208 /* 209 * VFS Operations. 210 * 211 * mount system call 212 */ 213 int 214 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 215 { 216 struct lwp *l = curlwp; 217 struct vnode *devvp; 218 struct iso_args *args = data; 219 int error; 220 struct iso_mnt *imp = VFSTOISOFS(mp); 221 222 if (args == NULL) 223 return EINVAL; 224 if (*data_len < sizeof *args) 225 return EINVAL; 226 227 if (mp->mnt_flag & MNT_GETARGS) { 228 if (imp == NULL) 229 return EIO; 230 args->fspec = NULL; 231 args->flags = imp->im_flags; 232 *data_len = sizeof (*args); 233 return 0; 234 } 235 236 if ((mp->mnt_flag & MNT_RDONLY) == 0) 237 return (EROFS); 238 239 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 240 return EINVAL; 241 242 /* 243 * Not an update, or updating the name: look up the name 244 * and verify that it refers to a sensible block device. 245 */ 246 error = namei_simple_user(args->fspec, 247 NSM_FOLLOW_NOEMULROOT, &devvp); 248 if (error != 0) 249 return (error); 250 251 if (devvp->v_type != VBLK) { 252 vrele(devvp); 253 return ENOTBLK; 254 } 255 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 256 vrele(devvp); 257 return ENXIO; 258 } 259 /* 260 * If mount by non-root, then verify that user has necessary 261 * permissions on the device. 262 */ 263 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 264 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 265 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(VREAD)); 266 if (error) { 267 goto fail; 268 } 269 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 270 error = VOP_OPEN(devvp, FREAD, FSCRED); 271 if (error) 272 goto fail; 273 VOP_UNLOCK(devvp); 274 error = iso_mountfs(devvp, mp, l, args); 275 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 276 if (error) { 277 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 278 goto fail; 279 } 280 VOP_UNLOCK(devvp); 281 /* reference to devvp is donated through iso_mountfs */ 282 } else { 283 if (devvp != imp->im_devvp && 284 devvp->v_rdev != imp->im_devvp->v_rdev) { 285 error = EINVAL; /* needs translation */ 286 goto fail; 287 } 288 VOP_UNLOCK(devvp); 289 vrele(devvp); 290 } 291 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 292 mp->mnt_op->vfs_name, mp, l); 293 294 fail: 295 VOP_UNLOCK(devvp); 296 vrele(devvp); 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 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 364 error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0); 365 VOP_UNLOCK(devvp); 366 if (error != 0) 367 return (error); 368 369 /* This is the "logical sector size". The standard says this 370 * should be 2048 or the physical sector size on the device, 371 * whichever is greater. For now, we'll just use a constant. 372 */ 373 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 374 375 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 376 if (!error) { 377 /* XXX more sanity checks? */ 378 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 379 } else { 380 /* fallback to old method */ 381 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 382 if (error) 383 sess = 0; /* never mind */ 384 } 385 #ifdef ISO_DEBUG 386 printf("isofs: session offset (part %"PRId32") %d\n", DISKPART(dev), sess); 387 #endif 388 389 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 390 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 391 iso_bsize, 0, &bp)) != 0) 392 goto out; 393 394 vdp = (struct iso_volume_descriptor *)bp->b_data; 395 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 396 error = EINVAL; 397 goto out; 398 } 399 400 switch (isonum_711(vdp->type)) { 401 case ISO_VD_PRIMARY: 402 if (pribp == NULL) { 403 pribp = bp; 404 bp = NULL; 405 } 406 break; 407 408 case ISO_VD_SUPPLEMENTARY: 409 if (supbp == NULL) { 410 supbp = bp; 411 bp = NULL; 412 } 413 break; 414 415 default: 416 break; 417 } 418 419 if (isonum_711 (vdp->type) == ISO_VD_END) { 420 brelse(bp, 0); 421 bp = NULL; 422 break; 423 } 424 425 if (bp != NULL) { 426 brelse(bp, 0); 427 bp = NULL; 428 } 429 } 430 431 if (pribp == NULL) { 432 error = EINVAL; 433 goto out; 434 } 435 436 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 437 memset(isomp, 0, sizeof *isomp); 438 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 439 error = EINVAL; 440 goto out; 441 } 442 443 isomp->volume_space_size += sess; 444 445 brelse(pribp, BC_AGE); 446 pribp = NULL; 447 448 mp->mnt_data = isomp; 449 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 450 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 451 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 452 mp->mnt_stat.f_namemax = ISO_MAXNAMLEN; 453 mp->mnt_flag |= MNT_LOCAL; 454 mp->mnt_iflag |= IMNT_MPSAFE | IMNT_SHRLOOKUP; 455 mp->mnt_dev_bshift = iso_bsize; 456 mp->mnt_fs_bshift = isomp->im_bshift; 457 isomp->im_mountp = mp; 458 isomp->im_dev = dev; 459 isomp->im_devvp = devvp; 460 461 if (argp->flags & ISOFSMNT_UID) 462 isomp->im_uid = argp->uid; 463 if (argp->flags & ISOFSMNT_GID) 464 isomp->im_gid = argp->gid; 465 isomp->im_fmask = argp->fmask & ACCESSPERMS; 466 isomp->im_dmask = argp->dmask & ACCESSPERMS; 467 468 /* Check the Rock Ridge Extension support */ 469 if (!(argp->flags & ISOFSMNT_NORRIP)) { 470 struct iso_directory_record *rootp; 471 472 if ((error = bread(isomp->im_devvp, 473 (isomp->root_extent + ext_attr_length) << 474 (isomp->im_bshift - DEV_BSHIFT), 475 isomp->logical_block_size, 476 0, &bp)) != 0) 477 goto out; 478 479 rootp = (struct iso_directory_record *)bp->b_data; 480 481 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 482 argp->flags |= ISOFSMNT_NORRIP; 483 } else { 484 argp->flags &= ~ISOFSMNT_GENS; 485 } 486 487 /* 488 * The contents are valid, 489 * but they will get reread as part of another vnode, so... 490 */ 491 brelse(bp, BC_AGE); 492 bp = NULL; 493 } 494 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 495 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS | 496 ISOFSMNT_UID | ISOFSMNT_GID); 497 498 if (isomp->im_flags & ISOFSMNT_GENS) 499 isomp->iso_ftype = ISO_FTYPE_9660; 500 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 501 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 502 if (argp->flags & ISOFSMNT_NOCASETRANS) 503 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 504 } else 505 isomp->iso_ftype = ISO_FTYPE_RRIP; 506 507 /* Check the Joliet Extension support */ 508 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 509 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 510 supbp != NULL) { 511 joliet_level = 0; 512 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 513 514 if ((isonum_711(sup->flags) & 1) == 0) { 515 if (memcmp(sup->escape, "%/@", 3) == 0) 516 joliet_level = 1; 517 if (memcmp(sup->escape, "%/C", 3) == 0) 518 joliet_level = 2; 519 if (memcmp(sup->escape, "%/E", 3) == 0) 520 joliet_level = 3; 521 } 522 if (joliet_level != 0) { 523 if (iso_makemp(isomp, supbp, NULL) == -1) { 524 error = EINVAL; 525 goto out; 526 } 527 isomp->im_joliet_level = joliet_level; 528 } 529 } 530 531 if (supbp != NULL) { 532 brelse(supbp, 0); 533 supbp = NULL; 534 } 535 536 spec_node_setmountedfs(devvp, mp); 537 538 return 0; 539 out: 540 if (bp) 541 brelse(bp, 0); 542 if (pribp) 543 brelse(pribp, 0); 544 if (supbp) 545 brelse(supbp, 0); 546 if (isomp) { 547 free(isomp, M_ISOFSMNT); 548 mp->mnt_data = NULL; 549 } 550 return error; 551 } 552 553 /* 554 * Make a filesystem operational. 555 * Nothing to do at the moment. 556 */ 557 /* ARGSUSED */ 558 int 559 cd9660_start(struct mount *mp, int flags) 560 { 561 return 0; 562 } 563 564 /* 565 * unmount system call 566 */ 567 int 568 cd9660_unmount(struct mount *mp, int mntflags) 569 { 570 struct iso_mnt *isomp; 571 int error, flags = 0; 572 573 if (mntflags & MNT_FORCE) 574 flags |= FORCECLOSE; 575 if ((error = vflush(mp, NULLVP, flags)) != 0) 576 return (error); 577 578 isomp = VFSTOISOFS(mp); 579 580 if (isomp->im_devvp->v_type != VBAD) 581 spec_node_setmountedfs(isomp->im_devvp, NULL); 582 583 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 584 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 585 vput(isomp->im_devvp); 586 free(isomp, M_ISOFSMNT); 587 mp->mnt_data = NULL; 588 mp->mnt_flag &= ~MNT_LOCAL; 589 return (error); 590 } 591 592 /* 593 * Return root of a filesystem 594 */ 595 int 596 cd9660_root(struct mount *mp, int lktype, struct vnode **vpp) 597 { 598 struct iso_mnt *imp = VFSTOISOFS(mp); 599 struct iso_directory_record *dp = 600 (struct iso_directory_record *)imp->root; 601 ino_t ino = isodirino(dp, imp); 602 603 return cd9660_vget(mp, ino, lktype, vpp); 604 } 605 606 /* 607 * Get file system statistics. 608 */ 609 int 610 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 611 { 612 struct iso_mnt *isomp; 613 614 isomp = VFSTOISOFS(mp); 615 616 sbp->f_bsize = isomp->logical_block_size; 617 sbp->f_frsize = sbp->f_bsize; 618 sbp->f_iosize = sbp->f_bsize; /* XXX */ 619 sbp->f_blocks = isomp->volume_space_size; 620 sbp->f_bfree = 0; /* total free blocks */ 621 sbp->f_bavail = 0; /* blocks free for non superuser */ 622 sbp->f_bresvd = 0; /* total reserved blocks */ 623 sbp->f_files = 0; /* total files */ 624 sbp->f_ffree = 0; /* free file nodes */ 625 sbp->f_favail = 0; /* free file nodes for non superuser */ 626 sbp->f_fresvd = 0; /* reserved file nodes */ 627 copy_statvfs_info(sbp, mp); 628 /* Use the first spare for flags: */ 629 sbp->f_spare[0] = isomp->im_flags; 630 return 0; 631 } 632 633 /* ARGSUSED */ 634 int 635 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 636 { 637 return 0; 638 } 639 640 /* 641 * File handle to vnode 642 * 643 * Have to be really careful about stale file handles: 644 * - check that the inode number is in range 645 * - call iget() to get the locked inode 646 * - check for an unallocated inode (i_mode == 0) 647 * - check that the generation number matches 648 */ 649 650 struct ifid { 651 ushort ifid_len; 652 ushort ifid_pad; 653 ino_t ifid_ino; 654 #ifdef ISOFS_DBG 655 u_long ifid_start; 656 #endif 657 }; 658 659 /* ARGSUSED */ 660 int 661 cd9660_fhtovp(struct mount *mp, struct fid *fhp, int lktype, struct vnode **vpp) 662 { 663 struct ifid ifh; 664 struct iso_node *ip; 665 struct vnode *nvp; 666 int error; 667 668 if (fhp->fid_len != sizeof(ifh)) 669 return EINVAL; 670 671 memcpy(&ifh, fhp, sizeof(ifh)); 672 #ifdef ISOFS_DBG 673 printf("fhtovp: ino %"PRIu64", start %lu\n", 674 ifh.ifid_ino, ifh.ifid_start); 675 #endif 676 677 if ((error = VFS_VGET(mp, ifh.ifid_ino, lktype, &nvp)) != 0) { 678 *vpp = NULLVP; 679 return (error); 680 } 681 ip = VTOI(nvp); 682 if (ip->inode.iso_mode == 0) { 683 vput(nvp); 684 *vpp = NULLVP; 685 return (ESTALE); 686 } 687 *vpp = nvp; 688 return (0); 689 } 690 691 int 692 cd9660_vget(struct mount *mp, ino_t ino, int lktype, struct vnode **vpp) 693 { 694 int error; 695 696 error = vcache_get(mp, &ino, sizeof(ino), vpp); 697 if (error) 698 return error; 699 error = vn_lock(*vpp, lktype); 700 if (error) { 701 vrele(*vpp); 702 *vpp = NULL; 703 return error; 704 } 705 return 0; 706 } 707 708 int 709 cd9660_loadvnode(struct mount *mp, struct vnode *vp, 710 const void *key, size_t key_len, const void **new_key) 711 { 712 struct iso_mnt *imp; 713 struct iso_node *ip; 714 struct iso_directory_record *isodir; 715 struct buf *bp; 716 dev_t dev; 717 ino_t ino; 718 int lbn, off; 719 int error; 720 721 KASSERT(key_len == sizeof(ino)); 722 memcpy(&ino, key, key_len); 723 imp = VFSTOISOFS(mp); 724 dev = imp->im_dev; 725 726 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 727 728 memset(ip, 0, sizeof(struct iso_node)); 729 ip->i_vnode = vp; 730 ip->i_dev = dev; 731 ip->i_number = ino; 732 ip->i_mnt = imp; 733 ip->i_devvp = imp->im_devvp; 734 735 lbn = cd9660_lblkno(imp, ino); 736 if (lbn >= imp->volume_space_size) { 737 pool_put(&cd9660_node_pool, ip); 738 printf("fhtovp: lbn exceed volume space %d\n", lbn); 739 return (ESTALE); 740 } 741 742 off = cd9660_blkoff(imp, ino); 743 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 744 pool_put(&cd9660_node_pool, ip); 745 printf("fhtovp: crosses block boundary %d\n", 746 off + ISO_DIRECTORY_RECORD_SIZE); 747 return (ESTALE); 748 } 749 750 error = bread(imp->im_devvp, 751 lbn << (imp->im_bshift - DEV_BSHIFT), 752 imp->logical_block_size, 0, &bp); 753 if (error) { 754 pool_put(&cd9660_node_pool, ip); 755 printf("fhtovp: bread error %d\n",error); 756 return (error); 757 } 758 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 759 760 if (off + isonum_711(isodir->length) > imp->logical_block_size) { 761 pool_put(&cd9660_node_pool, ip); 762 brelse(bp, 0); 763 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 764 off +isonum_711(isodir->length), off, 765 isonum_711(isodir->length)); 766 return (ESTALE); 767 } 768 769 #if 0 770 if (isonum_733(isodir->extent) + 771 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 772 pool_put(&cd9660_node_pool, ip); 773 if (bp != 0) 774 brelse(bp, 0); 775 printf("fhtovp: file start miss %d vs %d\n", 776 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 777 ifhp->ifid_start); 778 return (ESTALE); 779 } 780 #endif 781 782 ip->iso_extent = isonum_733(isodir->extent); 783 ip->i_size = isonum_733(isodir->size); 784 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 785 786 vp->v_tag = VT_ISOFS; 787 vp->v_op = cd9660_vnodeop_p; 788 vp->v_data = ip; 789 genfs_node_init(vp, &cd9660_genfsops); 790 791 /* 792 * Setup time stamp, attribute 793 */ 794 switch (imp->iso_ftype) { 795 default: /* ISO_FTYPE_9660 */ 796 { 797 struct buf *bp2; 798 if ((imp->im_flags & ISOFSMNT_EXTATT) 799 && (off = isonum_711(isodir->ext_attr_length))) 800 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 801 NULL, &bp2); 802 else 803 bp2 = NULL; 804 cd9660_defattr(isodir, ip, bp2); 805 cd9660_deftstamp(isodir, ip, bp2); 806 if (bp2) 807 brelse(bp2, 0); 808 break; 809 } 810 case ISO_FTYPE_RRIP: 811 cd9660_rrip_analyze(isodir, ip, imp); 812 break; 813 } 814 815 brelse(bp, 0); 816 817 /* 818 * Initialize the associated vnode 819 */ 820 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 821 case VFIFO: 822 vp->v_op = cd9660_fifoop_p; 823 break; 824 case VCHR: 825 case VBLK: 826 /* 827 * if device, look at device number table for translation 828 */ 829 vp->v_op = cd9660_specop_p; 830 spec_node_init(vp, ip->inode.iso_rdev); 831 break; 832 case VLNK: 833 case VNON: 834 case VSOCK: 835 case VDIR: 836 case VBAD: 837 break; 838 case VREG: 839 uvm_vnp_setsize(vp, ip->i_size); 840 break; 841 } 842 843 if (vp->v_type != VREG) 844 uvm_vnp_setsize(vp, 0); 845 846 if (ip->iso_extent == imp->root_extent) 847 vp->v_vflag |= VV_ROOT; 848 849 /* 850 * XXX need generation number? 851 */ 852 853 *new_key = &ip->i_number; 854 return 0; 855 } 856 857 /* 858 * Vnode pointer to File handle 859 */ 860 /* ARGSUSED */ 861 int 862 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 863 { 864 struct iso_node *ip = VTOI(vp); 865 struct ifid ifh; 866 867 if (*fh_size < sizeof(struct ifid)) { 868 *fh_size = sizeof(struct ifid); 869 return E2BIG; 870 } 871 *fh_size = sizeof(struct ifid); 872 873 memset(&ifh, 0, sizeof(ifh)); 874 ifh.ifid_len = sizeof(struct ifid); 875 ifh.ifid_ino = ip->i_number; 876 #ifdef ISOFS_DBG 877 ifh.ifid_start = ip->iso_start; 878 #endif 879 memcpy(fhp, &ifh, sizeof(ifh)); 880 881 #ifdef ISOFS_DBG 882 printf("vptofh: ino %"PRIu64", start %lu\n", 883 ifh.ifid_ino,ifh.ifid_start); 884 #endif 885 return 0; 886 } 887
Indexes created Sat Oct 18 23:09:54 GMT 2025