cd9660_vfsops.c revision 1.68
1 /* $NetBSD: cd9660_vfsops.c,v 1.68 2009/10/19 17:53:36 tsutsui 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 1.68 2009/10/19 17:53:36 tsutsui 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 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 373 /* XXX more sanity checks? */ 374 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 375 } else { 376 /* fallback to old method */ 377 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 378 if (error) 379 sess = 0; /* never mind */ 380 } 381 #ifdef ISO_DEBUG 382 printf("isofs: session offset (part %"PRId32") %d\n", DISKPART(dev), sess); 383 #endif 384 385 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 386 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 387 iso_bsize, NOCRED, 0, &bp)) != 0) 388 goto out; 389 390 vdp = (struct iso_volume_descriptor *)bp->b_data; 391 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 392 error = EINVAL; 393 goto out; 394 } 395 396 switch (isonum_711(vdp->type)) { 397 case ISO_VD_PRIMARY: 398 if (pribp == NULL) { 399 pribp = bp; 400 bp = NULL; 401 } 402 break; 403 404 case ISO_VD_SUPPLEMENTARY: 405 if (supbp == NULL) { 406 supbp = bp; 407 bp = NULL; 408 } 409 break; 410 411 default: 412 break; 413 } 414 415 if (isonum_711 (vdp->type) == ISO_VD_END) { 416 brelse(bp, 0); 417 bp = NULL; 418 break; 419 } 420 421 if (bp != NULL) { 422 brelse(bp, 0); 423 bp = NULL; 424 } 425 } 426 427 if (pribp == NULL) { 428 error = EINVAL; 429 goto out; 430 } 431 432 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 433 memset(isomp, 0, sizeof *isomp); 434 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 435 error = EINVAL; 436 goto out; 437 } 438 439 isomp->volume_space_size += sess; 440 441 brelse(pribp, BC_AGE); 442 pribp = NULL; 443 444 mp->mnt_data = isomp; 445 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 446 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 447 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 448 mp->mnt_stat.f_namemax = MAXNAMLEN; 449 mp->mnt_flag |= MNT_LOCAL; 450 mp->mnt_iflag |= IMNT_MPSAFE; 451 mp->mnt_dev_bshift = iso_bsize; 452 mp->mnt_fs_bshift = isomp->im_bshift; 453 isomp->im_mountp = mp; 454 isomp->im_dev = dev; 455 isomp->im_devvp = devvp; 456 457 /* Check the Rock Ridge Extension support */ 458 if (!(argp->flags & ISOFSMNT_NORRIP)) { 459 struct iso_directory_record *rootp; 460 461 if ((error = bread(isomp->im_devvp, 462 (isomp->root_extent + ext_attr_length) << 463 (isomp->im_bshift - DEV_BSHIFT), 464 isomp->logical_block_size, NOCRED, 465 0, &bp)) != 0) 466 goto out; 467 468 rootp = (struct iso_directory_record *)bp->b_data; 469 470 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 471 argp->flags |= ISOFSMNT_NORRIP; 472 } else { 473 argp->flags &= ~ISOFSMNT_GENS; 474 } 475 476 /* 477 * The contents are valid, 478 * but they will get reread as part of another vnode, so... 479 */ 480 brelse(bp, BC_AGE); 481 bp = NULL; 482 } 483 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 484 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 485 486 if (isomp->im_flags & ISOFSMNT_GENS) 487 isomp->iso_ftype = ISO_FTYPE_9660; 488 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 489 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 490 if (argp->flags & ISOFSMNT_NOCASETRANS) 491 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 492 } else 493 isomp->iso_ftype = ISO_FTYPE_RRIP; 494 495 /* Check the Joliet Extension support */ 496 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 497 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 498 supbp != NULL) { 499 joliet_level = 0; 500 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 501 502 if ((isonum_711(sup->flags) & 1) == 0) { 503 if (memcmp(sup->escape, "%/@", 3) == 0) 504 joliet_level = 1; 505 if (memcmp(sup->escape, "%/C", 3) == 0) 506 joliet_level = 2; 507 if (memcmp(sup->escape, "%/E", 3) == 0) 508 joliet_level = 3; 509 } 510 if (joliet_level != 0) { 511 if (iso_makemp(isomp, supbp, NULL) == -1) { 512 error = EINVAL; 513 goto out; 514 } 515 isomp->im_joliet_level = joliet_level; 516 } 517 } 518 519 if (supbp != NULL) { 520 brelse(supbp, 0); 521 supbp = NULL; 522 } 523 524 devvp->v_specmountpoint = mp; 525 526 return 0; 527 out: 528 if (bp) 529 brelse(bp, 0); 530 if (pribp) 531 brelse(pribp, 0); 532 if (supbp) 533 brelse(supbp, 0); 534 if (isomp) { 535 free(isomp, M_ISOFSMNT); 536 mp->mnt_data = NULL; 537 } 538 return error; 539 } 540 541 /* 542 * Make a filesystem operational. 543 * Nothing to do at the moment. 544 */ 545 /* ARGSUSED */ 546 int 547 cd9660_start(struct mount *mp, int flags) 548 { 549 return 0; 550 } 551 552 /* 553 * unmount system call 554 */ 555 int 556 cd9660_unmount(struct mount *mp, int mntflags) 557 { 558 struct iso_mnt *isomp; 559 int error, flags = 0; 560 561 if (mntflags & MNT_FORCE) 562 flags |= FORCECLOSE; 563 if ((error = vflush(mp, NULLVP, flags)) != 0) 564 return (error); 565 566 isomp = VFSTOISOFS(mp); 567 568 if (isomp->im_devvp->v_type != VBAD) 569 isomp->im_devvp->v_specmountpoint = NULL; 570 571 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 572 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 573 vput(isomp->im_devvp); 574 free(isomp, M_ISOFSMNT); 575 mp->mnt_data = NULL; 576 mp->mnt_flag &= ~MNT_LOCAL; 577 return (error); 578 } 579 580 /* 581 * Return root of a filesystem 582 */ 583 int 584 cd9660_root(struct mount *mp, struct vnode **vpp) 585 { 586 struct iso_mnt *imp = VFSTOISOFS(mp); 587 struct iso_directory_record *dp = 588 (struct iso_directory_record *)imp->root; 589 ino_t ino = isodirino(dp, imp); 590 591 /* 592 * With RRIP we must use the `.' entry of the root directory. 593 * Simply tell vget, that it's a relocated directory. 594 */ 595 return (cd9660_vget_internal(mp, ino, vpp, 596 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 597 } 598 599 /* 600 * Get file system statistics. 601 */ 602 int 603 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 604 { 605 struct iso_mnt *isomp; 606 607 isomp = VFSTOISOFS(mp); 608 609 sbp->f_bsize = isomp->logical_block_size; 610 sbp->f_frsize = sbp->f_bsize; 611 sbp->f_iosize = sbp->f_bsize; /* XXX */ 612 sbp->f_blocks = isomp->volume_space_size; 613 sbp->f_bfree = 0; /* total free blocks */ 614 sbp->f_bavail = 0; /* blocks free for non superuser */ 615 sbp->f_bresvd = 0; /* total reserved blocks */ 616 sbp->f_files = 0; /* total files */ 617 sbp->f_ffree = 0; /* free file nodes */ 618 sbp->f_favail = 0; /* free file nodes for non superuser */ 619 sbp->f_fresvd = 0; /* reserved file nodes */ 620 copy_statvfs_info(sbp, mp); 621 /* Use the first spare for flags: */ 622 sbp->f_spare[0] = isomp->im_flags; 623 return 0; 624 } 625 626 /* ARGSUSED */ 627 int 628 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 629 { 630 return 0; 631 } 632 633 /* 634 * File handle to vnode 635 * 636 * Have to be really careful about stale file handles: 637 * - check that the inode number is in range 638 * - call iget() to get the locked inode 639 * - check for an unallocated inode (i_mode == 0) 640 * - check that the generation number matches 641 */ 642 643 struct ifid { 644 ushort ifid_len; 645 ushort ifid_pad; 646 int ifid_ino; 647 long ifid_start; 648 }; 649 650 /* ARGSUSED */ 651 int 652 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 653 { 654 struct ifid ifh; 655 struct iso_node *ip; 656 struct vnode *nvp; 657 int error; 658 659 if (fhp->fid_len != sizeof(ifh)) 660 return EINVAL; 661 662 memcpy(&ifh, fhp, sizeof(ifh)); 663 #ifdef ISOFS_DBG 664 printf("fhtovp: ino %d, start %ld\n", 665 ifh.ifid_ino, ifh.ifid_start); 666 #endif 667 668 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 669 *vpp = NULLVP; 670 return (error); 671 } 672 ip = VTOI(nvp); 673 if (ip->inode.iso_mode == 0) { 674 vput(nvp); 675 *vpp = NULLVP; 676 return (ESTALE); 677 } 678 *vpp = nvp; 679 return (0); 680 } 681 682 int 683 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 684 { 685 686 /* 687 * XXXX 688 * It would be nice if we didn't always set the `relocated' flag 689 * and force the extra read, but I don't want to think about fixing 690 * that right now. 691 */ 692 return (cd9660_vget_internal(mp, ino, vpp, 693 #if 0 694 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 695 #else 696 0, 697 #endif 698 NULL)); 699 } 700 701 int 702 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 703 int relocated, struct iso_directory_record *isodir) 704 { 705 struct iso_mnt *imp; 706 struct iso_node *ip; 707 struct buf *bp; 708 struct vnode *vp; 709 dev_t dev; 710 int error; 711 712 imp = VFSTOISOFS(mp); 713 dev = imp->im_dev; 714 715 retry: 716 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP) 717 return (0); 718 719 /* Allocate a new vnode/iso_node. */ 720 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 721 *vpp = NULLVP; 722 return (error); 723 } 724 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 725 726 /* 727 * If someone beat us to it, put back the freshly allocated 728 * vnode/inode pair and retry. 729 */ 730 mutex_enter(&cd9660_hashlock); 731 if (cd9660_ihashget(dev, ino, 0) != NULL) { 732 mutex_exit(&cd9660_hashlock); 733 ungetnewvnode(vp); 734 pool_put(&cd9660_node_pool, ip); 735 goto retry; 736 } 737 738 memset(ip, 0, sizeof(struct iso_node)); 739 vp->v_data = ip; 740 ip->i_vnode = vp; 741 ip->i_dev = dev; 742 ip->i_number = ino; 743 ip->i_mnt = imp; 744 ip->i_devvp = imp->im_devvp; 745 genfs_node_init(vp, &cd9660_genfsops); 746 747 /* 748 * Put it onto its hash chain and lock it so that other requests for 749 * this inode will block if they arrive while we are sleeping waiting 750 * for old data structures to be purged or for the contents of the 751 * disk portion of this inode to be read. 752 */ 753 cd9660_ihashins(ip); 754 mutex_exit(&cd9660_hashlock); 755 756 if (isodir == 0) { 757 int lbn, off; 758 759 lbn = lblkno(imp, ino); 760 if (lbn >= imp->volume_space_size) { 761 vput(vp); 762 printf("fhtovp: lbn exceed volume space %d\n", lbn); 763 return (ESTALE); 764 } 765 766 off = blkoff(imp, ino); 767 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 768 vput(vp); 769 printf("fhtovp: crosses block boundary %d\n", 770 off + ISO_DIRECTORY_RECORD_SIZE); 771 return (ESTALE); 772 } 773 774 error = bread(imp->im_devvp, 775 lbn << (imp->im_bshift - DEV_BSHIFT), 776 imp->logical_block_size, NOCRED, 0, &bp); 777 if (error) { 778 vput(vp); 779 brelse(bp, 0); 780 printf("fhtovp: bread error %d\n",error); 781 return (error); 782 } 783 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 784 785 if (off + isonum_711(isodir->length) > 786 imp->logical_block_size) { 787 vput(vp); 788 if (bp != 0) 789 brelse(bp, 0); 790 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 791 off +isonum_711(isodir->length), off, 792 isonum_711(isodir->length)); 793 return (ESTALE); 794 } 795 796 #if 0 797 if (isonum_733(isodir->extent) + 798 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 799 if (bp != 0) 800 brelse(bp, 0); 801 printf("fhtovp: file start miss %d vs %d\n", 802 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 803 ifhp->ifid_start); 804 return (ESTALE); 805 } 806 #endif 807 } else 808 bp = 0; 809 810 VREF(ip->i_devvp); 811 812 if (relocated) { 813 /* 814 * On relocated directories we must 815 * read the `.' entry out of a dir. 816 */ 817 ip->iso_start = ino >> imp->im_bshift; 818 if (bp != 0) 819 brelse(bp, 0); 820 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 821 vput(vp); 822 return (error); 823 } 824 isodir = (struct iso_directory_record *)bp->b_data; 825 } 826 827 ip->iso_extent = isonum_733(isodir->extent); 828 ip->i_size = isonum_733(isodir->size); 829 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 830 831 /* 832 * Setup time stamp, attribute 833 */ 834 vp->v_type = VNON; 835 switch (imp->iso_ftype) { 836 default: /* ISO_FTYPE_9660 */ 837 { 838 struct buf *bp2; 839 int off; 840 if ((imp->im_flags & ISOFSMNT_EXTATT) 841 && (off = isonum_711(isodir->ext_attr_length))) 842 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 843 NULL, &bp2); 844 else 845 bp2 = NULL; 846 cd9660_defattr(isodir, ip, bp2); 847 cd9660_deftstamp(isodir, ip, bp2); 848 if (bp2) 849 brelse(bp2, 0); 850 break; 851 } 852 case ISO_FTYPE_RRIP: 853 cd9660_rrip_analyze(isodir, ip, imp); 854 break; 855 } 856 857 if (bp != 0) 858 brelse(bp, 0); 859 860 /* 861 * Initialize the associated vnode 862 */ 863 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 864 case VFIFO: 865 vp->v_op = cd9660_fifoop_p; 866 break; 867 case VCHR: 868 case VBLK: 869 /* 870 * if device, look at device number table for translation 871 */ 872 vp->v_op = cd9660_specop_p; 873 spec_node_init(vp, ip->inode.iso_rdev); 874 break; 875 case VLNK: 876 case VNON: 877 case VSOCK: 878 case VDIR: 879 case VBAD: 880 break; 881 case VREG: 882 uvm_vnp_setsize(vp, ip->i_size); 883 break; 884 } 885 886 if (vp->v_type != VREG) 887 uvm_vnp_setsize(vp, 0); 888 889 if (ip->iso_extent == imp->root_extent) 890 vp->v_vflag |= VV_ROOT; 891 892 /* 893 * XXX need generation number? 894 */ 895 896 *vpp = vp; 897 return (0); 898 } 899 900 /* 901 * Vnode pointer to File handle 902 */ 903 /* ARGSUSED */ 904 int 905 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 906 { 907 struct iso_node *ip = VTOI(vp); 908 struct ifid ifh; 909 910 if (*fh_size < sizeof(struct ifid)) { 911 *fh_size = sizeof(struct ifid); 912 return E2BIG; 913 } 914 *fh_size = sizeof(struct ifid); 915 916 memset(&ifh, 0, sizeof(ifh)); 917 ifh.ifid_len = sizeof(struct ifid); 918 ifh.ifid_ino = ip->i_number; 919 ifh.ifid_start = ip->iso_start; 920 memcpy(fhp, &ifh, sizeof(ifh)); 921 922 #ifdef ISOFS_DBG 923 printf("vptofh: ino %d, start %ld\n", 924 ifh.ifid_ino,ifh.ifid_start); 925 #endif 926 return 0; 927 } 928
Indexes created Fri Sep 26 08:10:20 GMT 2025