cd9660_vfsops.c revision 1.88
1 /* $NetBSD: cd9660_vfsops.c,v 1.88 2014/06/22 09:47:40 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 1.88 2014/06/22 09:47:40 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 static struct sysctllog *cd9660_sysctl_log; 82 83 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 84 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 85 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 86 87 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 88 &cd9660_vnodeop_opv_desc, 89 &cd9660_specop_opv_desc, 90 &cd9660_fifoop_opv_desc, 91 NULL, 92 }; 93 94 struct vfsops cd9660_vfsops = { 95 .vfs_name = MOUNT_CD9660, 96 .vfs_min_mount_data = sizeof (struct iso_args), 97 .vfs_mount = cd9660_mount, 98 .vfs_start = cd9660_start, 99 .vfs_unmount = cd9660_unmount, 100 .vfs_root = cd9660_root, 101 .vfs_quotactl = (void *)eopnotsupp, 102 .vfs_statvfs = cd9660_statvfs, 103 .vfs_sync = cd9660_sync, 104 .vfs_vget = cd9660_vget, 105 .vfs_loadvnode = cd9660_loadvnode, 106 .vfs_fhtovp = cd9660_fhtovp, 107 .vfs_vptofh = cd9660_vptofh, 108 .vfs_init = cd9660_init, 109 .vfs_reinit = cd9660_reinit, 110 .vfs_done = cd9660_done, 111 .vfs_mountroot = cd9660_mountroot, 112 .vfs_snapshot = (void *)eopnotsupp, 113 .vfs_extattrctl = vfs_stdextattrctl, 114 .vfs_suspendctl = (void *)eopnotsupp, 115 .vfs_renamelock_enter = genfs_renamelock_enter, 116 .vfs_renamelock_exit = genfs_renamelock_exit, 117 .vfs_fsync = (void *)eopnotsupp, 118 .vfs_opv_descs = cd9660_vnodeopv_descs 119 }; 120 121 static const struct genfs_ops cd9660_genfsops = { 122 .gop_size = genfs_size, 123 }; 124 125 /* 126 * Called by vfs_mountroot when iso is going to be mounted as root. 127 * 128 * Name is updated by mount(8) after booting. 129 */ 130 #define ROOTNAME "root_device" 131 132 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 133 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 134 struct lwp *l, struct iso_args *argp); 135 136 static int 137 cd9660_modcmd(modcmd_t cmd, void *arg) 138 { 139 int error; 140 141 switch (cmd) { 142 case MODULE_CMD_INIT: 143 error = vfs_attach(&cd9660_vfsops); 144 if (error != 0) 145 break; 146 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, 147 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 148 SYSCTL_DESCR("ISO-9660 file system"), 149 NULL, 0, NULL, 0, 150 CTL_VFS, 14, CTL_EOL); 151 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, 152 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 153 CTLTYPE_INT, "utf8_joliet", 154 SYSCTL_DESCR("Encode Joliet filenames to UTF-8"), 155 NULL, 0, &cd9660_utf8_joliet, 0, 156 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 157 /* 158 * XXX the "14" above could be dynamic, thereby eliminating 159 * one more instance of the "number to vfs" mapping problem, 160 * but "14" is the order as taken from sys/mount.h 161 */ 162 break; 163 case MODULE_CMD_FINI: 164 error = vfs_detach(&cd9660_vfsops); 165 if (error != 0) 166 break; 167 sysctl_teardown(&cd9660_sysctl_log); 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, false, NULL); 197 vfs_destroy(mp); 198 return (error); 199 } 200 mountlist_append(mp); 201 (void)cd9660_statvfs(mp, &mp->mnt_stat); 202 vfs_unbusy(mp, false, NULL); 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 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 362 return (error); 363 364 /* This is the "logical sector size". The standard says this 365 * should be 2048 or the physical sector size on the device, 366 * whichever is greater. For now, we'll just use a constant. 367 */ 368 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 369 370 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 371 if (!error) { 372 /* XXX more sanity checks? */ 373 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 374 } else { 375 /* fallback to old method */ 376 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 377 if (error) 378 sess = 0; /* never mind */ 379 } 380 #ifdef ISO_DEBUG 381 printf("isofs: session offset (part %"PRId32") %d\n", DISKPART(dev), sess); 382 #endif 383 384 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 385 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 386 iso_bsize, NOCRED, 0, &bp)) != 0) 387 goto out; 388 389 vdp = (struct iso_volume_descriptor *)bp->b_data; 390 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 391 error = EINVAL; 392 goto out; 393 } 394 395 switch (isonum_711(vdp->type)) { 396 case ISO_VD_PRIMARY: 397 if (pribp == NULL) { 398 pribp = bp; 399 bp = NULL; 400 } 401 break; 402 403 case ISO_VD_SUPPLEMENTARY: 404 if (supbp == NULL) { 405 supbp = bp; 406 bp = NULL; 407 } 408 break; 409 410 default: 411 break; 412 } 413 414 if (isonum_711 (vdp->type) == ISO_VD_END) { 415 brelse(bp, 0); 416 bp = NULL; 417 break; 418 } 419 420 if (bp != NULL) { 421 brelse(bp, 0); 422 bp = NULL; 423 } 424 } 425 426 if (pribp == NULL) { 427 error = EINVAL; 428 goto out; 429 } 430 431 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 432 memset(isomp, 0, sizeof *isomp); 433 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 434 error = EINVAL; 435 goto out; 436 } 437 438 isomp->volume_space_size += sess; 439 440 brelse(pribp, BC_AGE); 441 pribp = NULL; 442 443 mp->mnt_data = isomp; 444 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 445 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 446 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 447 mp->mnt_stat.f_namemax = ISO_MAXNAMLEN; 448 mp->mnt_flag |= MNT_LOCAL; 449 mp->mnt_iflag |= IMNT_MPSAFE; 450 mp->mnt_dev_bshift = iso_bsize; 451 mp->mnt_fs_bshift = isomp->im_bshift; 452 isomp->im_mountp = mp; 453 isomp->im_dev = dev; 454 isomp->im_devvp = devvp; 455 456 /* Check the Rock Ridge Extension support */ 457 if (!(argp->flags & ISOFSMNT_NORRIP)) { 458 struct iso_directory_record *rootp; 459 460 if ((error = bread(isomp->im_devvp, 461 (isomp->root_extent + ext_attr_length) << 462 (isomp->im_bshift - DEV_BSHIFT), 463 isomp->logical_block_size, NOCRED, 464 0, &bp)) != 0) 465 goto out; 466 467 rootp = (struct iso_directory_record *)bp->b_data; 468 469 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 470 argp->flags |= ISOFSMNT_NORRIP; 471 } else { 472 argp->flags &= ~ISOFSMNT_GENS; 473 } 474 475 /* 476 * The contents are valid, 477 * but they will get reread as part of another vnode, so... 478 */ 479 brelse(bp, BC_AGE); 480 bp = NULL; 481 } 482 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 483 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 484 485 if (isomp->im_flags & ISOFSMNT_GENS) 486 isomp->iso_ftype = ISO_FTYPE_9660; 487 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 488 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 489 if (argp->flags & ISOFSMNT_NOCASETRANS) 490 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 491 } else 492 isomp->iso_ftype = ISO_FTYPE_RRIP; 493 494 /* Check the Joliet Extension support */ 495 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 496 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 497 supbp != NULL) { 498 joliet_level = 0; 499 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 500 501 if ((isonum_711(sup->flags) & 1) == 0) { 502 if (memcmp(sup->escape, "%/@", 3) == 0) 503 joliet_level = 1; 504 if (memcmp(sup->escape, "%/C", 3) == 0) 505 joliet_level = 2; 506 if (memcmp(sup->escape, "%/E", 3) == 0) 507 joliet_level = 3; 508 } 509 if (joliet_level != 0) { 510 if (iso_makemp(isomp, supbp, NULL) == -1) { 511 error = EINVAL; 512 goto out; 513 } 514 isomp->im_joliet_level = joliet_level; 515 } 516 } 517 518 if (supbp != NULL) { 519 brelse(supbp, 0); 520 supbp = NULL; 521 } 522 523 spec_node_setmountedfs(devvp, mp); 524 525 return 0; 526 out: 527 if (bp) 528 brelse(bp, 0); 529 if (pribp) 530 brelse(pribp, 0); 531 if (supbp) 532 brelse(supbp, 0); 533 if (isomp) { 534 free(isomp, M_ISOFSMNT); 535 mp->mnt_data = NULL; 536 } 537 return error; 538 } 539 540 /* 541 * Make a filesystem operational. 542 * Nothing to do at the moment. 543 */ 544 /* ARGSUSED */ 545 int 546 cd9660_start(struct mount *mp, int flags) 547 { 548 return 0; 549 } 550 551 /* 552 * unmount system call 553 */ 554 int 555 cd9660_unmount(struct mount *mp, int mntflags) 556 { 557 struct iso_mnt *isomp; 558 int error, flags = 0; 559 560 if (mntflags & MNT_FORCE) 561 flags |= FORCECLOSE; 562 if ((error = vflush(mp, NULLVP, flags)) != 0) 563 return (error); 564 565 isomp = VFSTOISOFS(mp); 566 567 if (isomp->im_devvp->v_type != VBAD) 568 spec_node_setmountedfs(isomp->im_devvp, NULL); 569 570 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 571 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 572 vput(isomp->im_devvp); 573 free(isomp, M_ISOFSMNT); 574 mp->mnt_data = NULL; 575 mp->mnt_flag &= ~MNT_LOCAL; 576 return (error); 577 } 578 579 /* 580 * Return root of a filesystem 581 */ 582 int 583 cd9660_root(struct mount *mp, struct vnode **vpp) 584 { 585 struct iso_mnt *imp = VFSTOISOFS(mp); 586 struct iso_directory_record *dp = 587 (struct iso_directory_record *)imp->root; 588 ino_t ino = isodirino(dp, imp); 589 590 return cd9660_vget(mp, ino, vpp); 591 } 592 593 /* 594 * Get file system statistics. 595 */ 596 int 597 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 598 { 599 struct iso_mnt *isomp; 600 601 isomp = VFSTOISOFS(mp); 602 603 sbp->f_bsize = isomp->logical_block_size; 604 sbp->f_frsize = sbp->f_bsize; 605 sbp->f_iosize = sbp->f_bsize; /* XXX */ 606 sbp->f_blocks = isomp->volume_space_size; 607 sbp->f_bfree = 0; /* total free blocks */ 608 sbp->f_bavail = 0; /* blocks free for non superuser */ 609 sbp->f_bresvd = 0; /* total reserved blocks */ 610 sbp->f_files = 0; /* total files */ 611 sbp->f_ffree = 0; /* free file nodes */ 612 sbp->f_favail = 0; /* free file nodes for non superuser */ 613 sbp->f_fresvd = 0; /* reserved file nodes */ 614 copy_statvfs_info(sbp, mp); 615 /* Use the first spare for flags: */ 616 sbp->f_spare[0] = isomp->im_flags; 617 return 0; 618 } 619 620 /* ARGSUSED */ 621 int 622 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 623 { 624 return 0; 625 } 626 627 /* 628 * File handle to vnode 629 * 630 * Have to be really careful about stale file handles: 631 * - check that the inode number is in range 632 * - call iget() to get the locked inode 633 * - check for an unallocated inode (i_mode == 0) 634 * - check that the generation number matches 635 */ 636 637 struct ifid { 638 ushort ifid_len; 639 ushort ifid_pad; 640 ino_t ifid_ino; 641 #ifdef ISOFS_DBG 642 u_long ifid_start; 643 #endif 644 }; 645 646 /* ARGSUSED */ 647 int 648 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 649 { 650 struct ifid ifh; 651 struct iso_node *ip; 652 struct vnode *nvp; 653 int error; 654 655 if (fhp->fid_len != sizeof(ifh)) 656 return EINVAL; 657 658 memcpy(&ifh, fhp, sizeof(ifh)); 659 #ifdef ISOFS_DBG 660 printf("fhtovp: ino %"PRIu64", start %lu\n", 661 ifh.ifid_ino, ifh.ifid_start); 662 #endif 663 664 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 665 *vpp = NULLVP; 666 return (error); 667 } 668 ip = VTOI(nvp); 669 if (ip->inode.iso_mode == 0) { 670 vput(nvp); 671 *vpp = NULLVP; 672 return (ESTALE); 673 } 674 *vpp = nvp; 675 return (0); 676 } 677 678 int 679 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 680 { 681 int error; 682 683 error = vcache_get(mp, &ino, sizeof(ino), vpp); 684 if (error) 685 return error; 686 error = vn_lock(*vpp, LK_EXCLUSIVE); 687 if (error) { 688 vrele(*vpp); 689 *vpp = NULL; 690 return error; 691 } 692 return 0; 693 } 694 695 int 696 cd9660_loadvnode(struct mount *mp, struct vnode *vp, 697 const void *key, size_t key_len, const void **new_key) 698 { 699 struct iso_mnt *imp; 700 struct iso_node *ip; 701 struct iso_directory_record *isodir; 702 struct buf *bp; 703 dev_t dev; 704 ino_t ino; 705 int lbn, off; 706 int error; 707 708 KASSERT(key_len == sizeof(ino)); 709 memcpy(&ino, key, key_len); 710 imp = VFSTOISOFS(mp); 711 dev = imp->im_dev; 712 713 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 714 715 memset(ip, 0, sizeof(struct iso_node)); 716 ip->i_vnode = vp; 717 ip->i_dev = dev; 718 ip->i_number = ino; 719 ip->i_mnt = imp; 720 ip->i_devvp = imp->im_devvp; 721 722 lbn = cd9660_lblkno(imp, ino); 723 if (lbn >= imp->volume_space_size) { 724 pool_put(&cd9660_node_pool, ip); 725 printf("fhtovp: lbn exceed volume space %d\n", lbn); 726 return (ESTALE); 727 } 728 729 off = cd9660_blkoff(imp, ino); 730 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 731 pool_put(&cd9660_node_pool, ip); 732 printf("fhtovp: crosses block boundary %d\n", 733 off + ISO_DIRECTORY_RECORD_SIZE); 734 return (ESTALE); 735 } 736 737 error = bread(imp->im_devvp, 738 lbn << (imp->im_bshift - DEV_BSHIFT), 739 imp->logical_block_size, NOCRED, 0, &bp); 740 if (error) { 741 pool_put(&cd9660_node_pool, ip); 742 printf("fhtovp: bread error %d\n",error); 743 return (error); 744 } 745 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 746 747 if (off + isonum_711(isodir->length) > imp->logical_block_size) { 748 pool_put(&cd9660_node_pool, ip); 749 brelse(bp, 0); 750 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 751 off +isonum_711(isodir->length), off, 752 isonum_711(isodir->length)); 753 return (ESTALE); 754 } 755 756 #if 0 757 if (isonum_733(isodir->extent) + 758 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 759 pool_put(&cd9660_node_pool, ip); 760 if (bp != 0) 761 brelse(bp, 0); 762 printf("fhtovp: file start miss %d vs %d\n", 763 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 764 ifhp->ifid_start); 765 return (ESTALE); 766 } 767 #endif 768 769 ip->iso_extent = isonum_733(isodir->extent); 770 ip->i_size = isonum_733(isodir->size); 771 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 772 773 vp->v_tag = VT_ISOFS; 774 vp->v_op = cd9660_vnodeop_p; 775 vp->v_data = ip; 776 genfs_node_init(vp, &cd9660_genfsops); 777 778 /* 779 * Setup time stamp, attribute 780 */ 781 switch (imp->iso_ftype) { 782 default: /* ISO_FTYPE_9660 */ 783 { 784 struct buf *bp2; 785 if ((imp->im_flags & ISOFSMNT_EXTATT) 786 && (off = isonum_711(isodir->ext_attr_length))) 787 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 788 NULL, &bp2); 789 else 790 bp2 = NULL; 791 cd9660_defattr(isodir, ip, bp2); 792 cd9660_deftstamp(isodir, ip, bp2); 793 if (bp2) 794 brelse(bp2, 0); 795 break; 796 } 797 case ISO_FTYPE_RRIP: 798 cd9660_rrip_analyze(isodir, ip, imp); 799 break; 800 } 801 802 brelse(bp, 0); 803 804 /* 805 * Initialize the associated vnode 806 */ 807 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 808 case VFIFO: 809 vp->v_op = cd9660_fifoop_p; 810 break; 811 case VCHR: 812 case VBLK: 813 /* 814 * if device, look at device number table for translation 815 */ 816 vp->v_op = cd9660_specop_p; 817 spec_node_init(vp, ip->inode.iso_rdev); 818 break; 819 case VLNK: 820 case VNON: 821 case VSOCK: 822 case VDIR: 823 case VBAD: 824 break; 825 case VREG: 826 uvm_vnp_setsize(vp, ip->i_size); 827 break; 828 } 829 830 if (vp->v_type != VREG) 831 uvm_vnp_setsize(vp, 0); 832 833 if (ip->iso_extent == imp->root_extent) 834 vp->v_vflag |= VV_ROOT; 835 836 /* 837 * XXX need generation number? 838 */ 839 840 *new_key = &ip->i_number; 841 return 0; 842 } 843 844 /* 845 * Vnode pointer to File handle 846 */ 847 /* ARGSUSED */ 848 int 849 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 850 { 851 struct iso_node *ip = VTOI(vp); 852 struct ifid ifh; 853 854 if (*fh_size < sizeof(struct ifid)) { 855 *fh_size = sizeof(struct ifid); 856 return E2BIG; 857 } 858 *fh_size = sizeof(struct ifid); 859 860 memset(&ifh, 0, sizeof(ifh)); 861 ifh.ifid_len = sizeof(struct ifid); 862 ifh.ifid_ino = ip->i_number; 863 #ifdef ISOFS_DBG 864 ifh.ifid_start = ip->iso_start; 865 #endif 866 memcpy(fhp, &ifh, sizeof(ifh)); 867 868 #ifdef ISOFS_DBG 869 printf("vptofh: ino %"PRIu64", start %lu\n", 870 ifh.ifid_ino,ifh.ifid_start); 871 #endif 872 return 0; 873 } 874
Indexes created Thu Sep 25 16:09:42 GMT 2025