cd9660_vfsops.c revision 1.81
1 /* $NetBSD: cd9660_vfsops.c,v 1.81 2014/02/25 18:30:10 pooka 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 1.81 2014/02/25 18:30:10 pooka 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, "cd9660", 149 SYSCTL_DESCR("ISO-9660 file system"), 150 NULL, 0, NULL, 0, 151 CTL_VFS, 14, CTL_EOL); 152 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, 153 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 154 CTLTYPE_INT, "utf8_joliet", 155 SYSCTL_DESCR("Encode Joliet filenames to UTF-8"), 156 NULL, 0, &cd9660_utf8_joliet, 0, 157 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 158 /* 159 * XXX the "14" above could be dynamic, thereby eliminating 160 * one more instance of the "number to vfs" mapping problem, 161 * but "14" is the order as taken from sys/mount.h 162 */ 163 break; 164 case MODULE_CMD_FINI: 165 error = vfs_detach(&cd9660_vfsops); 166 if (error != 0) 167 break; 168 sysctl_teardown(&cd9660_sysctl_log); 169 break; 170 default: 171 error = ENOTTY; 172 break; 173 } 174 175 return (error); 176 } 177 178 int 179 cd9660_mountroot(void) 180 { 181 struct mount *mp; 182 struct lwp *l = curlwp; 183 int error; 184 struct iso_args args; 185 186 if (device_class(root_device) != DV_DISK) 187 return (ENODEV); 188 189 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 190 != 0) { 191 vrele(rootvp); 192 return (error); 193 } 194 195 args.flags = ISOFSMNT_ROOT; 196 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 197 vfs_unbusy(mp, false, NULL); 198 vfs_destroy(mp); 199 return (error); 200 } 201 mountlist_append(mp); 202 (void)cd9660_statvfs(mp, &mp->mnt_stat); 203 vfs_unbusy(mp, false, NULL); 204 return (0); 205 } 206 207 /* 208 * VFS Operations. 209 * 210 * mount system call 211 */ 212 int 213 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 214 { 215 struct lwp *l = curlwp; 216 struct vnode *devvp; 217 struct iso_args *args = data; 218 int error; 219 struct iso_mnt *imp = VFSTOISOFS(mp); 220 221 if (*data_len < sizeof *args) 222 return EINVAL; 223 224 if (mp->mnt_flag & MNT_GETARGS) { 225 if (imp == NULL) 226 return EIO; 227 args->fspec = NULL; 228 args->flags = imp->im_flags; 229 *data_len = sizeof (*args); 230 return 0; 231 } 232 233 if ((mp->mnt_flag & MNT_RDONLY) == 0) 234 return (EROFS); 235 236 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 237 return EINVAL; 238 239 /* 240 * Not an update, or updating the name: look up the name 241 * and verify that it refers to a sensible block device. 242 */ 243 error = namei_simple_user(args->fspec, 244 NSM_FOLLOW_NOEMULROOT, &devvp); 245 if (error != 0) 246 return (error); 247 248 if (devvp->v_type != VBLK) { 249 vrele(devvp); 250 return ENOTBLK; 251 } 252 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 253 vrele(devvp); 254 return ENXIO; 255 } 256 /* 257 * If mount by non-root, then verify that user has necessary 258 * permissions on the device. 259 */ 260 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 261 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 262 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(VREAD)); 263 VOP_UNLOCK(devvp); 264 if (error) { 265 vrele(devvp); 266 return (error); 267 } 268 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 269 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 270 error = VOP_OPEN(devvp, FREAD, FSCRED); 271 VOP_UNLOCK(devvp); 272 if (error) 273 goto fail; 274 error = iso_mountfs(devvp, mp, l, args); 275 if (error) { 276 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 277 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 278 VOP_UNLOCK(devvp); 279 goto fail; 280 } 281 } else { 282 vrele(devvp); 283 if (devvp != imp->im_devvp && 284 devvp->v_rdev != imp->im_devvp->v_rdev) 285 return (EINVAL); /* needs translation */ 286 } 287 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 288 mp->mnt_op->vfs_name, mp, l); 289 290 fail: 291 vrele(devvp); 292 return (error); 293 } 294 295 /* 296 * Make a mount point from a volume descriptor 297 */ 298 static int 299 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len) 300 { 301 struct iso_primary_descriptor *pri; 302 int logical_block_size; 303 struct iso_directory_record *rootp; 304 305 pri = (struct iso_primary_descriptor *)bp->b_data; 306 307 logical_block_size = isonum_723 (pri->logical_block_size); 308 309 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 310 || (logical_block_size & (logical_block_size - 1)) != 0) 311 return -1; 312 313 rootp = (struct iso_directory_record *)pri->root_directory_record; 314 315 isomp->logical_block_size = logical_block_size; 316 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 317 memcpy(isomp->root, rootp, sizeof(isomp->root)); 318 isomp->root_extent = isonum_733 (rootp->extent); 319 isomp->root_size = isonum_733 (rootp->size); 320 isomp->im_joliet_level = 0; 321 322 isomp->im_bmask = logical_block_size - 1; 323 isomp->im_bshift = 0; 324 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 325 isomp->im_bshift++; 326 327 if (ea_len != NULL) 328 *ea_len = isonum_711(rootp->ext_attr_length); 329 330 return 0; 331 } 332 333 /* 334 * Common code for mount and mountroot 335 */ 336 static int 337 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, 338 struct iso_args *argp) 339 { 340 struct iso_mnt *isomp = (struct iso_mnt *)0; 341 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 342 dev_t dev = devvp->v_rdev; 343 int error = EINVAL; 344 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 345 int iso_bsize; 346 int iso_blknum; 347 int joliet_level; 348 struct iso_volume_descriptor *vdp; 349 struct iso_supplementary_descriptor *sup; 350 int sess = 0; 351 int ext_attr_length; 352 struct disklabel label; 353 354 if (!ronly) 355 return EROFS; 356 357 /* Flush out any old buffers remaining from a previous use. */ 358 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 359 return (error); 360 361 /* This is the "logical sector size". The standard says this 362 * should be 2048 or the physical sector size on the device, 363 * whichever is greater. For now, we'll just use a constant. 364 */ 365 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 366 367 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 368 if (!error) { 369 /* XXX more sanity checks? */ 370 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 371 } else { 372 /* fallback to old method */ 373 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 374 if (error) 375 sess = 0; /* never mind */ 376 } 377 #ifdef ISO_DEBUG 378 printf("isofs: session offset (part %"PRId32") %d\n", DISKPART(dev), sess); 379 #endif 380 381 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 382 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 383 iso_bsize, NOCRED, 0, &bp)) != 0) 384 goto out; 385 386 vdp = (struct iso_volume_descriptor *)bp->b_data; 387 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 388 error = EINVAL; 389 goto out; 390 } 391 392 switch (isonum_711(vdp->type)) { 393 case ISO_VD_PRIMARY: 394 if (pribp == NULL) { 395 pribp = bp; 396 bp = NULL; 397 } 398 break; 399 400 case ISO_VD_SUPPLEMENTARY: 401 if (supbp == NULL) { 402 supbp = bp; 403 bp = NULL; 404 } 405 break; 406 407 default: 408 break; 409 } 410 411 if (isonum_711 (vdp->type) == ISO_VD_END) { 412 brelse(bp, 0); 413 bp = NULL; 414 break; 415 } 416 417 if (bp != NULL) { 418 brelse(bp, 0); 419 bp = NULL; 420 } 421 } 422 423 if (pribp == NULL) { 424 error = EINVAL; 425 goto out; 426 } 427 428 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 429 memset(isomp, 0, sizeof *isomp); 430 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 431 error = EINVAL; 432 goto out; 433 } 434 435 isomp->volume_space_size += sess; 436 437 brelse(pribp, BC_AGE); 438 pribp = NULL; 439 440 mp->mnt_data = isomp; 441 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 442 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 443 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 444 mp->mnt_stat.f_namemax = ISO_MAXNAMLEN; 445 mp->mnt_flag |= MNT_LOCAL; 446 mp->mnt_iflag |= IMNT_MPSAFE; 447 mp->mnt_dev_bshift = iso_bsize; 448 mp->mnt_fs_bshift = isomp->im_bshift; 449 isomp->im_mountp = mp; 450 isomp->im_dev = dev; 451 isomp->im_devvp = devvp; 452 453 /* Check the Rock Ridge Extension support */ 454 if (!(argp->flags & ISOFSMNT_NORRIP)) { 455 struct iso_directory_record *rootp; 456 457 if ((error = bread(isomp->im_devvp, 458 (isomp->root_extent + ext_attr_length) << 459 (isomp->im_bshift - DEV_BSHIFT), 460 isomp->logical_block_size, NOCRED, 461 0, &bp)) != 0) 462 goto out; 463 464 rootp = (struct iso_directory_record *)bp->b_data; 465 466 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 467 argp->flags |= ISOFSMNT_NORRIP; 468 } else { 469 argp->flags &= ~ISOFSMNT_GENS; 470 } 471 472 /* 473 * The contents are valid, 474 * but they will get reread as part of another vnode, so... 475 */ 476 brelse(bp, BC_AGE); 477 bp = NULL; 478 } 479 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 480 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 481 482 if (isomp->im_flags & ISOFSMNT_GENS) 483 isomp->iso_ftype = ISO_FTYPE_9660; 484 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 485 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 486 if (argp->flags & ISOFSMNT_NOCASETRANS) 487 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 488 } else 489 isomp->iso_ftype = ISO_FTYPE_RRIP; 490 491 /* Check the Joliet Extension support */ 492 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 493 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 494 supbp != NULL) { 495 joliet_level = 0; 496 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 497 498 if ((isonum_711(sup->flags) & 1) == 0) { 499 if (memcmp(sup->escape, "%/@", 3) == 0) 500 joliet_level = 1; 501 if (memcmp(sup->escape, "%/C", 3) == 0) 502 joliet_level = 2; 503 if (memcmp(sup->escape, "%/E", 3) == 0) 504 joliet_level = 3; 505 } 506 if (joliet_level != 0) { 507 if (iso_makemp(isomp, supbp, NULL) == -1) { 508 error = EINVAL; 509 goto out; 510 } 511 isomp->im_joliet_level = joliet_level; 512 } 513 } 514 515 if (supbp != NULL) { 516 brelse(supbp, 0); 517 supbp = NULL; 518 } 519 520 spec_node_setmountedfs(devvp, mp); 521 522 return 0; 523 out: 524 if (bp) 525 brelse(bp, 0); 526 if (pribp) 527 brelse(pribp, 0); 528 if (supbp) 529 brelse(supbp, 0); 530 if (isomp) { 531 free(isomp, M_ISOFSMNT); 532 mp->mnt_data = NULL; 533 } 534 return error; 535 } 536 537 /* 538 * Make a filesystem operational. 539 * Nothing to do at the moment. 540 */ 541 /* ARGSUSED */ 542 int 543 cd9660_start(struct mount *mp, int flags) 544 { 545 return 0; 546 } 547 548 /* 549 * unmount system call 550 */ 551 int 552 cd9660_unmount(struct mount *mp, int mntflags) 553 { 554 struct iso_mnt *isomp; 555 int error, flags = 0; 556 557 if (mntflags & MNT_FORCE) 558 flags |= FORCECLOSE; 559 if ((error = vflush(mp, NULLVP, flags)) != 0) 560 return (error); 561 562 isomp = VFSTOISOFS(mp); 563 564 if (isomp->im_devvp->v_type != VBAD) 565 spec_node_setmountedfs(isomp->im_devvp, NULL); 566 567 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 568 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 569 vput(isomp->im_devvp); 570 free(isomp, M_ISOFSMNT); 571 mp->mnt_data = NULL; 572 mp->mnt_flag &= ~MNT_LOCAL; 573 return (error); 574 } 575 576 /* 577 * Return root of a filesystem 578 */ 579 int 580 cd9660_root(struct mount *mp, struct vnode **vpp) 581 { 582 struct iso_mnt *imp = VFSTOISOFS(mp); 583 struct iso_directory_record *dp = 584 (struct iso_directory_record *)imp->root; 585 ino_t ino = isodirino(dp, imp); 586 587 /* 588 * With RRIP we must use the `.' entry of the root directory. 589 * Simply tell vget, that it's a relocated directory. 590 */ 591 return (cd9660_vget_internal(mp, ino, vpp, 592 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 593 } 594 595 /* 596 * Get file system statistics. 597 */ 598 int 599 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 600 { 601 struct iso_mnt *isomp; 602 603 isomp = VFSTOISOFS(mp); 604 605 sbp->f_bsize = isomp->logical_block_size; 606 sbp->f_frsize = sbp->f_bsize; 607 sbp->f_iosize = sbp->f_bsize; /* XXX */ 608 sbp->f_blocks = isomp->volume_space_size; 609 sbp->f_bfree = 0; /* total free blocks */ 610 sbp->f_bavail = 0; /* blocks free for non superuser */ 611 sbp->f_bresvd = 0; /* total reserved blocks */ 612 sbp->f_files = 0; /* total files */ 613 sbp->f_ffree = 0; /* free file nodes */ 614 sbp->f_favail = 0; /* free file nodes for non superuser */ 615 sbp->f_fresvd = 0; /* reserved file nodes */ 616 copy_statvfs_info(sbp, mp); 617 /* Use the first spare for flags: */ 618 sbp->f_spare[0] = isomp->im_flags; 619 return 0; 620 } 621 622 /* ARGSUSED */ 623 int 624 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 625 { 626 return 0; 627 } 628 629 /* 630 * File handle to vnode 631 * 632 * Have to be really careful about stale file handles: 633 * - check that the inode number is in range 634 * - call iget() to get the locked inode 635 * - check for an unallocated inode (i_mode == 0) 636 * - check that the generation number matches 637 */ 638 639 struct ifid { 640 ushort ifid_len; 641 ushort ifid_pad; 642 int ifid_ino; 643 long ifid_start; 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 %d, start %ld\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 { 681 682 /* 683 * XXXX 684 * It would be nice if we didn't always set the `relocated' flag 685 * and force the extra read, but I don't want to think about fixing 686 * that right now. 687 */ 688 return (cd9660_vget_internal(mp, ino, vpp, 689 #if 0 690 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 691 #else 692 0, 693 #endif 694 NULL)); 695 } 696 697 int 698 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 699 int relocated, struct iso_directory_record *isodir) 700 { 701 struct iso_mnt *imp; 702 struct iso_node *ip; 703 struct buf *bp; 704 struct vnode *vp; 705 dev_t dev; 706 int error; 707 708 imp = VFSTOISOFS(mp); 709 dev = imp->im_dev; 710 711 retry: 712 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP) 713 return (0); 714 715 /* Allocate a new vnode/iso_node. */ 716 error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, NULL, &vp); 717 if (error) { 718 *vpp = NULLVP; 719 return (error); 720 } 721 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 722 723 /* 724 * If someone beat us to it, put back the freshly allocated 725 * vnode/inode pair and retry. 726 */ 727 mutex_enter(&cd9660_hashlock); 728 if (cd9660_ihashget(dev, ino, 0) != NULL) { 729 mutex_exit(&cd9660_hashlock); 730 ungetnewvnode(vp); 731 pool_put(&cd9660_node_pool, ip); 732 goto retry; 733 } 734 735 memset(ip, 0, sizeof(struct iso_node)); 736 vp->v_data = ip; 737 ip->i_vnode = vp; 738 ip->i_dev = dev; 739 ip->i_number = ino; 740 ip->i_mnt = imp; 741 ip->i_devvp = imp->im_devvp; 742 genfs_node_init(vp, &cd9660_genfsops); 743 744 /* 745 * Put it onto its hash chain and lock it so that other requests for 746 * this inode will block if they arrive while we are sleeping waiting 747 * for old data structures to be purged or for the contents of the 748 * disk portion of this inode to be read. 749 */ 750 cd9660_ihashins(ip); 751 mutex_exit(&cd9660_hashlock); 752 753 if (isodir == 0) { 754 int lbn, off; 755 756 lbn = cd9660_lblkno(imp, ino); 757 if (lbn >= imp->volume_space_size) { 758 vput(vp); 759 printf("fhtovp: lbn exceed volume space %d\n", lbn); 760 return (ESTALE); 761 } 762 763 off = cd9660_blkoff(imp, ino); 764 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 765 vput(vp); 766 printf("fhtovp: crosses block boundary %d\n", 767 off + ISO_DIRECTORY_RECORD_SIZE); 768 return (ESTALE); 769 } 770 771 error = bread(imp->im_devvp, 772 lbn << (imp->im_bshift - DEV_BSHIFT), 773 imp->logical_block_size, NOCRED, 0, &bp); 774 if (error) { 775 vput(vp); 776 printf("fhtovp: bread error %d\n",error); 777 return (error); 778 } 779 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 780 781 if (off + isonum_711(isodir->length) > 782 imp->logical_block_size) { 783 vput(vp); 784 if (bp != 0) 785 brelse(bp, 0); 786 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 787 off +isonum_711(isodir->length), off, 788 isonum_711(isodir->length)); 789 return (ESTALE); 790 } 791 792 #if 0 793 if (isonum_733(isodir->extent) + 794 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 795 if (bp != 0) 796 brelse(bp, 0); 797 printf("fhtovp: file start miss %d vs %d\n", 798 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 799 ifhp->ifid_start); 800 return (ESTALE); 801 } 802 #endif 803 } else 804 bp = 0; 805 806 vref(ip->i_devvp); 807 808 if (relocated) { 809 /* 810 * On relocated directories we must 811 * read the `.' entry out of a dir. 812 */ 813 ip->iso_start = ino >> imp->im_bshift; 814 if (bp != 0) 815 brelse(bp, 0); 816 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 817 vput(vp); 818 return (error); 819 } 820 isodir = (struct iso_directory_record *)bp->b_data; 821 } 822 823 ip->iso_extent = isonum_733(isodir->extent); 824 ip->i_size = isonum_733(isodir->size); 825 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 826 827 /* 828 * Setup time stamp, attribute 829 */ 830 vp->v_type = VNON; 831 switch (imp->iso_ftype) { 832 default: /* ISO_FTYPE_9660 */ 833 { 834 struct buf *bp2; 835 int off; 836 if ((imp->im_flags & ISOFSMNT_EXTATT) 837 && (off = isonum_711(isodir->ext_attr_length))) 838 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 839 NULL, &bp2); 840 else 841 bp2 = NULL; 842 cd9660_defattr(isodir, ip, bp2); 843 cd9660_deftstamp(isodir, ip, bp2); 844 if (bp2) 845 brelse(bp2, 0); 846 break; 847 } 848 case ISO_FTYPE_RRIP: 849 cd9660_rrip_analyze(isodir, ip, imp); 850 break; 851 } 852 853 if (bp != 0) 854 brelse(bp, 0); 855 856 /* 857 * Initialize the associated vnode 858 */ 859 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 860 case VFIFO: 861 vp->v_op = cd9660_fifoop_p; 862 break; 863 case VCHR: 864 case VBLK: 865 /* 866 * if device, look at device number table for translation 867 */ 868 vp->v_op = cd9660_specop_p; 869 spec_node_init(vp, ip->inode.iso_rdev); 870 break; 871 case VLNK: 872 case VNON: 873 case VSOCK: 874 case VDIR: 875 case VBAD: 876 break; 877 case VREG: 878 uvm_vnp_setsize(vp, ip->i_size); 879 break; 880 } 881 882 if (vp->v_type != VREG) 883 uvm_vnp_setsize(vp, 0); 884 885 if (ip->iso_extent == imp->root_extent) 886 vp->v_vflag |= VV_ROOT; 887 888 /* 889 * XXX need generation number? 890 */ 891 892 *vpp = vp; 893 return (0); 894 } 895 896 /* 897 * Vnode pointer to File handle 898 */ 899 /* ARGSUSED */ 900 int 901 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 902 { 903 struct iso_node *ip = VTOI(vp); 904 struct ifid ifh; 905 906 if (*fh_size < sizeof(struct ifid)) { 907 *fh_size = sizeof(struct ifid); 908 return E2BIG; 909 } 910 *fh_size = sizeof(struct ifid); 911 912 memset(&ifh, 0, sizeof(ifh)); 913 ifh.ifid_len = sizeof(struct ifid); 914 ifh.ifid_ino = ip->i_number; 915 ifh.ifid_start = ip->iso_start; 916 memcpy(fhp, &ifh, sizeof(ifh)); 917 918 #ifdef ISOFS_DBG 919 printf("vptofh: ino %d, start %ld\n", 920 ifh.ifid_ino,ifh.ifid_start); 921 #endif 922 return 0; 923 } 924
Indexes created Sun Oct 19 02:09:48 GMT 2025