cd9660_vfsops.c revision 1.70
1 /* $NetBSD: cd9660_vfsops.c,v 1.70 2010/01/26 21:29:48 mlelstv 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 1.70 2010/01/26 21:29:48 mlelstv 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 MOUNT_CD9660, 96 sizeof (struct iso_args), 97 cd9660_mount, 98 cd9660_start, 99 cd9660_unmount, 100 cd9660_root, 101 (void *)eopnotsupp, 102 cd9660_statvfs, 103 cd9660_sync, 104 cd9660_vget, 105 cd9660_fhtovp, 106 cd9660_vptofh, 107 cd9660_init, 108 cd9660_reinit, 109 cd9660_done, 110 cd9660_mountroot, 111 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 112 vfs_stdextattrctl, 113 (void *)eopnotsupp, /* vfs_suspendctl */ 114 genfs_renamelock_enter, 115 genfs_renamelock_exit, 116 (void *)eopnotsupp, 117 cd9660_vnodeopv_descs, 118 0, /* refcount */ 119 { NULL, NULL } /* list */ 120 }; 121 122 static const struct genfs_ops cd9660_genfsops = { 123 .gop_size = genfs_size, 124 }; 125 126 /* 127 * Called by vfs_mountroot when iso is going to be mounted as root. 128 * 129 * Name is updated by mount(8) after booting. 130 */ 131 #define ROOTNAME "root_device" 132 133 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 134 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 135 struct lwp *l, struct iso_args *argp); 136 137 static int 138 cd9660_modcmd(modcmd_t cmd, void *arg) 139 { 140 int error; 141 142 switch (cmd) { 143 case MODULE_CMD_INIT: 144 error = vfs_attach(&cd9660_vfsops); 145 if (error != 0) 146 break; 147 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, 148 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 149 NULL, 0, NULL, 0, 150 CTL_VFS, CTL_EOL); 151 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, 152 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 153 SYSCTL_DESCR("ISO-9660 file system"), 154 NULL, 0, NULL, 0, 155 CTL_VFS, 14, CTL_EOL); 156 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, 157 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 158 CTLTYPE_INT, "utf8_joliet", 159 SYSCTL_DESCR("Encode Joliet filenames to UTF-8"), 160 NULL, 0, &cd9660_utf8_joliet, 0, 161 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 162 /* 163 * XXX the "14" above could be dynamic, thereby eliminating 164 * one more instance of the "number to vfs" mapping problem, 165 * but "14" is the order as taken from sys/mount.h 166 */ 167 break; 168 case MODULE_CMD_FINI: 169 error = vfs_detach(&cd9660_vfsops); 170 if (error != 0) 171 break; 172 sysctl_teardown(&cd9660_sysctl_log); 173 break; 174 default: 175 error = ENOTTY; 176 break; 177 } 178 179 return (error); 180 } 181 182 int 183 cd9660_mountroot(void) 184 { 185 struct mount *mp; 186 struct lwp *l = curlwp; 187 int error; 188 struct iso_args args; 189 190 if (device_class(root_device) != DV_DISK) 191 return (ENODEV); 192 193 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 194 != 0) { 195 vrele(rootvp); 196 return (error); 197 } 198 199 args.flags = ISOFSMNT_ROOT; 200 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 201 vfs_unbusy(mp, false, NULL); 202 vfs_destroy(mp); 203 return (error); 204 } 205 mutex_enter(&mountlist_lock); 206 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 207 mutex_exit(&mountlist_lock); 208 (void)cd9660_statvfs(mp, &mp->mnt_stat); 209 vfs_unbusy(mp, false, NULL); 210 return (0); 211 } 212 213 /* 214 * VFS Operations. 215 * 216 * mount system call 217 */ 218 int 219 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 220 { 221 struct lwp *l = curlwp; 222 struct vnode *devvp; 223 struct iso_args *args = data; 224 int error; 225 struct iso_mnt *imp = VFSTOISOFS(mp); 226 227 if (*data_len < sizeof *args) 228 return EINVAL; 229 230 if (mp->mnt_flag & MNT_GETARGS) { 231 if (imp == NULL) 232 return EIO; 233 args->fspec = NULL; 234 args->flags = imp->im_flags; 235 *data_len = sizeof (*args); 236 return 0; 237 } 238 239 if ((mp->mnt_flag & MNT_RDONLY) == 0) 240 return (EROFS); 241 242 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 243 return EINVAL; 244 245 /* 246 * Not an update, or updating the name: look up the name 247 * and verify that it refers to a sensible block device. 248 */ 249 error = namei_simple_user(args->fspec, 250 NSM_FOLLOW_NOEMULROOT, &devvp); 251 if (error != 0) 252 return (error); 253 254 if (devvp->v_type != VBLK) { 255 vrele(devvp); 256 return ENOTBLK; 257 } 258 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 259 vrele(devvp); 260 return ENXIO; 261 } 262 /* 263 * If mount by non-root, then verify that user has necessary 264 * permissions on the device. 265 */ 266 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 267 error = genfs_can_mount(devvp, VREAD, l->l_cred); 268 VOP_UNLOCK(devvp, 0); 269 if (error) { 270 vrele(devvp); 271 return (error); 272 } 273 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 274 error = VOP_OPEN(devvp, FREAD, FSCRED); 275 if (error) 276 goto fail; 277 error = iso_mountfs(devvp, mp, l, args); 278 if (error) { 279 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 280 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 281 VOP_UNLOCK(devvp, 0); 282 goto fail; 283 } 284 } else { 285 vrele(devvp); 286 if (devvp != imp->im_devvp && 287 devvp->v_rdev != imp->im_devvp->v_rdev) 288 return (EINVAL); /* needs translation */ 289 } 290 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 291 mp->mnt_op->vfs_name, mp, l); 292 293 fail: 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 = 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 devvp->v_specmountpoint = 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 isomp->im_devvp->v_specmountpoint = 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 /* 591 * With RRIP we must use the `.' entry of the root directory. 592 * Simply tell vget, that it's a relocated directory. 593 */ 594 return (cd9660_vget_internal(mp, ino, vpp, 595 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 596 } 597 598 /* 599 * Get file system statistics. 600 */ 601 int 602 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 603 { 604 struct iso_mnt *isomp; 605 606 isomp = VFSTOISOFS(mp); 607 608 sbp->f_bsize = isomp->logical_block_size; 609 sbp->f_frsize = sbp->f_bsize; 610 sbp->f_iosize = sbp->f_bsize; /* XXX */ 611 sbp->f_blocks = isomp->volume_space_size; 612 sbp->f_bfree = 0; /* total free blocks */ 613 sbp->f_bavail = 0; /* blocks free for non superuser */ 614 sbp->f_bresvd = 0; /* total reserved blocks */ 615 sbp->f_files = 0; /* total files */ 616 sbp->f_ffree = 0; /* free file nodes */ 617 sbp->f_favail = 0; /* free file nodes for non superuser */ 618 sbp->f_fresvd = 0; /* reserved file nodes */ 619 copy_statvfs_info(sbp, mp); 620 /* Use the first spare for flags: */ 621 sbp->f_spare[0] = isomp->im_flags; 622 return 0; 623 } 624 625 /* ARGSUSED */ 626 int 627 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 628 { 629 return 0; 630 } 631 632 /* 633 * File handle to vnode 634 * 635 * Have to be really careful about stale file handles: 636 * - check that the inode number is in range 637 * - call iget() to get the locked inode 638 * - check for an unallocated inode (i_mode == 0) 639 * - check that the generation number matches 640 */ 641 642 struct ifid { 643 ushort ifid_len; 644 ushort ifid_pad; 645 int ifid_ino; 646 long ifid_start; 647 }; 648 649 /* ARGSUSED */ 650 int 651 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 652 { 653 struct ifid ifh; 654 struct iso_node *ip; 655 struct vnode *nvp; 656 int error; 657 658 if (fhp->fid_len != sizeof(ifh)) 659 return EINVAL; 660 661 memcpy(&ifh, fhp, sizeof(ifh)); 662 #ifdef ISOFS_DBG 663 printf("fhtovp: ino %d, start %ld\n", 664 ifh.ifid_ino, ifh.ifid_start); 665 #endif 666 667 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 668 *vpp = NULLVP; 669 return (error); 670 } 671 ip = VTOI(nvp); 672 if (ip->inode.iso_mode == 0) { 673 vput(nvp); 674 *vpp = NULLVP; 675 return (ESTALE); 676 } 677 *vpp = nvp; 678 return (0); 679 } 680 681 int 682 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 683 { 684 685 /* 686 * XXXX 687 * It would be nice if we didn't always set the `relocated' flag 688 * and force the extra read, but I don't want to think about fixing 689 * that right now. 690 */ 691 return (cd9660_vget_internal(mp, ino, vpp, 692 #if 0 693 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 694 #else 695 0, 696 #endif 697 NULL)); 698 } 699 700 int 701 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 702 int relocated, struct iso_directory_record *isodir) 703 { 704 struct iso_mnt *imp; 705 struct iso_node *ip; 706 struct buf *bp; 707 struct vnode *vp; 708 dev_t dev; 709 int error; 710 711 imp = VFSTOISOFS(mp); 712 dev = imp->im_dev; 713 714 retry: 715 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP) 716 return (0); 717 718 /* Allocate a new vnode/iso_node. */ 719 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 720 *vpp = NULLVP; 721 return (error); 722 } 723 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 724 725 /* 726 * If someone beat us to it, put back the freshly allocated 727 * vnode/inode pair and retry. 728 */ 729 mutex_enter(&cd9660_hashlock); 730 if (cd9660_ihashget(dev, ino, 0) != NULL) { 731 mutex_exit(&cd9660_hashlock); 732 ungetnewvnode(vp); 733 pool_put(&cd9660_node_pool, ip); 734 goto retry; 735 } 736 737 memset(ip, 0, sizeof(struct iso_node)); 738 vp->v_data = ip; 739 ip->i_vnode = vp; 740 ip->i_dev = dev; 741 ip->i_number = ino; 742 ip->i_mnt = imp; 743 ip->i_devvp = imp->im_devvp; 744 genfs_node_init(vp, &cd9660_genfsops); 745 746 /* 747 * Put it onto its hash chain and lock it so that other requests for 748 * this inode will block if they arrive while we are sleeping waiting 749 * for old data structures to be purged or for the contents of the 750 * disk portion of this inode to be read. 751 */ 752 cd9660_ihashins(ip); 753 mutex_exit(&cd9660_hashlock); 754 755 if (isodir == 0) { 756 int lbn, off; 757 758 lbn = lblkno(imp, ino); 759 if (lbn >= imp->volume_space_size) { 760 vput(vp); 761 printf("fhtovp: lbn exceed volume space %d\n", lbn); 762 return (ESTALE); 763 } 764 765 off = blkoff(imp, ino); 766 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 767 vput(vp); 768 printf("fhtovp: crosses block boundary %d\n", 769 off + ISO_DIRECTORY_RECORD_SIZE); 770 return (ESTALE); 771 } 772 773 error = bread(imp->im_devvp, 774 lbn << (imp->im_bshift - DEV_BSHIFT), 775 imp->logical_block_size, NOCRED, 0, &bp); 776 if (error) { 777 vput(vp); 778 brelse(bp, 0); 779 printf("fhtovp: bread error %d\n",error); 780 return (error); 781 } 782 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 783 784 if (off + isonum_711(isodir->length) > 785 imp->logical_block_size) { 786 vput(vp); 787 if (bp != 0) 788 brelse(bp, 0); 789 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 790 off +isonum_711(isodir->length), off, 791 isonum_711(isodir->length)); 792 return (ESTALE); 793 } 794 795 #if 0 796 if (isonum_733(isodir->extent) + 797 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 798 if (bp != 0) 799 brelse(bp, 0); 800 printf("fhtovp: file start miss %d vs %d\n", 801 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 802 ifhp->ifid_start); 803 return (ESTALE); 804 } 805 #endif 806 } else 807 bp = 0; 808 809 vref(ip->i_devvp); 810 811 if (relocated) { 812 /* 813 * On relocated directories we must 814 * read the `.' entry out of a dir. 815 */ 816 ip->iso_start = ino >> imp->im_bshift; 817 if (bp != 0) 818 brelse(bp, 0); 819 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 820 vput(vp); 821 return (error); 822 } 823 isodir = (struct iso_directory_record *)bp->b_data; 824 } 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 /* 831 * Setup time stamp, attribute 832 */ 833 vp->v_type = VNON; 834 switch (imp->iso_ftype) { 835 default: /* ISO_FTYPE_9660 */ 836 { 837 struct buf *bp2; 838 int off; 839 if ((imp->im_flags & ISOFSMNT_EXTATT) 840 && (off = isonum_711(isodir->ext_attr_length))) 841 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 842 NULL, &bp2); 843 else 844 bp2 = NULL; 845 cd9660_defattr(isodir, ip, bp2); 846 cd9660_deftstamp(isodir, ip, bp2); 847 if (bp2) 848 brelse(bp2, 0); 849 break; 850 } 851 case ISO_FTYPE_RRIP: 852 cd9660_rrip_analyze(isodir, ip, imp); 853 break; 854 } 855 856 if (bp != 0) 857 brelse(bp, 0); 858 859 /* 860 * Initialize the associated vnode 861 */ 862 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 863 case VFIFO: 864 vp->v_op = cd9660_fifoop_p; 865 break; 866 case VCHR: 867 case VBLK: 868 /* 869 * if device, look at device number table for translation 870 */ 871 vp->v_op = cd9660_specop_p; 872 spec_node_init(vp, ip->inode.iso_rdev); 873 break; 874 case VLNK: 875 case VNON: 876 case VSOCK: 877 case VDIR: 878 case VBAD: 879 break; 880 case VREG: 881 uvm_vnp_setsize(vp, ip->i_size); 882 break; 883 } 884 885 if (vp->v_type != VREG) 886 uvm_vnp_setsize(vp, 0); 887 888 if (ip->iso_extent == imp->root_extent) 889 vp->v_vflag |= VV_ROOT; 890 891 /* 892 * XXX need generation number? 893 */ 894 895 *vpp = vp; 896 return (0); 897 } 898 899 /* 900 * Vnode pointer to File handle 901 */ 902 /* ARGSUSED */ 903 int 904 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 905 { 906 struct iso_node *ip = VTOI(vp); 907 struct ifid ifh; 908 909 if (*fh_size < sizeof(struct ifid)) { 910 *fh_size = sizeof(struct ifid); 911 return E2BIG; 912 } 913 *fh_size = sizeof(struct ifid); 914 915 memset(&ifh, 0, sizeof(ifh)); 916 ifh.ifid_len = sizeof(struct ifid); 917 ifh.ifid_ino = ip->i_number; 918 ifh.ifid_start = ip->iso_start; 919 memcpy(fhp, &ifh, sizeof(ifh)); 920 921 #ifdef ISOFS_DBG 922 printf("vptofh: ino %d, start %ld\n", 923 ifh.ifid_ino,ifh.ifid_start); 924 #endif 925 return 0; 926 } 927
Indexes created Thu Sep 25 16:09:42 GMT 2025