cd9660_vfsops.c revision 1.4
1 /* $NetBSD: cd9660_vfsops.c,v 1.4 2003/04/03 15:37:55 christos 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. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: cd9660_vfsops.c,v 1.4 2003/04/03 15:37:55 christos Exp $"); 45 46 #if defined(_KERNEL_OPT) 47 #include "opt_compat_netbsd.h" 48 #endif 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/namei.h> 53 #include <sys/proc.h> 54 #include <sys/kernel.h> 55 #include <sys/vnode.h> 56 #include <miscfs/specfs/specdev.h> 57 #include <sys/mount.h> 58 #include <sys/buf.h> 59 #include <sys/file.h> 60 #include <sys/disklabel.h> 61 #include <sys/device.h> 62 #include <sys/ioctl.h> 63 #include <sys/cdio.h> 64 #include <sys/errno.h> 65 #include <sys/malloc.h> 66 #include <sys/pool.h> 67 #include <sys/stat.h> 68 #include <sys/conf.h> 69 70 #include <fs/cd9660/iso.h> 71 #include <fs/cd9660/cd9660_extern.h> 72 #include <fs/cd9660/iso_rrip.h> 73 #include <fs/cd9660/cd9660_node.h> 74 #include <fs/cd9660/cd9660_mount.h> 75 76 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 77 78 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 79 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 80 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 81 82 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 83 &cd9660_vnodeop_opv_desc, 84 &cd9660_specop_opv_desc, 85 &cd9660_fifoop_opv_desc, 86 NULL, 87 }; 88 89 struct vfsops cd9660_vfsops = { 90 MOUNT_CD9660, 91 cd9660_mount, 92 cd9660_start, 93 cd9660_unmount, 94 cd9660_root, 95 cd9660_quotactl, 96 cd9660_statfs, 97 cd9660_sync, 98 cd9660_vget, 99 cd9660_fhtovp, 100 cd9660_vptofh, 101 cd9660_init, 102 cd9660_reinit, 103 cd9660_done, 104 cd9660_sysctl, 105 cd9660_mountroot, 106 cd9660_check_export, 107 cd9660_vnodeopv_descs, 108 }; 109 110 struct genfs_ops cd9660_genfsops = { 111 genfs_size, 112 }; 113 114 /* 115 * Called by vfs_mountroot when iso is going to be mounted as root. 116 * 117 * Name is updated by mount(8) after booting. 118 */ 119 #define ROOTNAME "root_device" 120 121 static int iso_makemp __P((struct iso_mnt *isomp, struct buf *bp, int *ea_len)); 122 static int iso_mountfs __P((struct vnode *devvp, struct mount *mp, 123 struct proc *p, struct iso_args *argp)); 124 125 int 126 cd9660_mountroot() 127 { 128 struct mount *mp; 129 struct proc *p = curproc; /* XXX */ 130 int error; 131 struct iso_args args; 132 133 if (root_device->dv_class != DV_DISK) 134 return (ENODEV); 135 136 /* 137 * Get vnodes for swapdev and rootdev. 138 */ 139 if (bdevvp(rootdev, &rootvp)) 140 panic("cd9660_mountroot: can't setup rootvp"); 141 142 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 143 != 0) { 144 vrele(rootvp); 145 return (error); 146 } 147 148 args.flags = ISOFSMNT_ROOT; 149 if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) { 150 mp->mnt_op->vfs_refcount--; 151 vfs_unbusy(mp); 152 free(mp, M_MOUNT); 153 vrele(rootvp); 154 return (error); 155 } 156 simple_lock(&mountlist_slock); 157 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 158 simple_unlock(&mountlist_slock); 159 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 160 vfs_unbusy(mp); 161 inittodr(0); 162 return (0); 163 } 164 165 /* 166 * VFS Operations. 167 * 168 * mount system call 169 */ 170 int 171 cd9660_mount(mp, path, data, ndp, p) 172 struct mount *mp; 173 const char *path; 174 void *data; 175 struct nameidata *ndp; 176 struct proc *p; 177 { 178 struct vnode *devvp; 179 struct iso_args args; 180 size_t size; 181 int error; 182 struct iso_mnt *imp = NULL; 183 184 if (mp->mnt_flag & MNT_GETARGS) { 185 imp = VFSTOISOFS(mp); 186 if (imp == NULL) 187 return EIO; 188 args.fspec = NULL; 189 args.flags = imp->im_flags; 190 vfs_showexport(mp, &args.export, &imp->im_export); 191 return copyout(&args, data, sizeof(args)); 192 } 193 error = copyin(data, &args, sizeof (struct iso_args)); 194 if (error) 195 return (error); 196 197 if ((mp->mnt_flag & MNT_RDONLY) == 0) 198 return (EROFS); 199 200 /* 201 * If updating, check whether changing from read-only to 202 * read/write; if there is no device name, that's all we do. 203 */ 204 if (mp->mnt_flag & MNT_UPDATE) { 205 imp = VFSTOISOFS(mp); 206 if (args.fspec == 0) 207 return (vfs_export(mp, &imp->im_export, &args.export)); 208 } 209 /* 210 * Not an update, or updating the name: look up the name 211 * and verify that it refers to a sensible block device. 212 */ 213 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 214 if ((error = namei(ndp)) != 0) 215 return (error); 216 devvp = ndp->ni_vp; 217 218 if (devvp->v_type != VBLK) { 219 vrele(devvp); 220 return ENOTBLK; 221 } 222 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 223 vrele(devvp); 224 return ENXIO; 225 } 226 /* 227 * If mount by non-root, then verify that user has necessary 228 * permissions on the device. 229 */ 230 if (p->p_ucred->cr_uid != 0) { 231 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 232 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 233 VOP_UNLOCK(devvp, 0); 234 if (error) { 235 vrele(devvp); 236 return (error); 237 } 238 } 239 if ((mp->mnt_flag & MNT_UPDATE) == 0) 240 error = iso_mountfs(devvp, mp, p, &args); 241 else { 242 if (devvp != imp->im_devvp) 243 error = EINVAL; /* needs translation */ 244 else 245 vrele(devvp); 246 } 247 if (error) { 248 vrele(devvp); 249 return error; 250 } 251 imp = VFSTOISOFS(mp); 252 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 253 memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size); 254 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 255 &size); 256 memset(mp->mnt_stat.f_mntfromname + size, 0, MNAMELEN - size); 257 return 0; 258 } 259 260 /* 261 * Make a mount point from a volume descriptor 262 */ 263 static int 264 iso_makemp(isomp, bp, ea_len) 265 struct iso_mnt *isomp; 266 struct buf *bp; 267 int *ea_len; 268 { 269 struct iso_primary_descriptor *pri; 270 int logical_block_size; 271 struct iso_directory_record *rootp; 272 273 pri = (struct iso_primary_descriptor *)bp->b_data; 274 275 logical_block_size = isonum_723 (pri->logical_block_size); 276 277 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 278 || (logical_block_size & (logical_block_size - 1)) != 0) 279 return -1; 280 281 rootp = (struct iso_directory_record *)pri->root_directory_record; 282 283 isomp->logical_block_size = logical_block_size; 284 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 285 memcpy(isomp->root, rootp, sizeof(isomp->root)); 286 isomp->root_extent = isonum_733 (rootp->extent); 287 isomp->root_size = isonum_733 (rootp->size); 288 isomp->im_joliet_level = 0; 289 290 isomp->im_bmask = logical_block_size - 1; 291 isomp->im_bshift = 0; 292 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 293 isomp->im_bshift++; 294 295 if (ea_len != NULL) 296 *ea_len = isonum_711(rootp->ext_attr_length); 297 298 return 0; 299 } 300 301 /* 302 * Common code for mount and mountroot 303 */ 304 static int 305 iso_mountfs(devvp, mp, p, argp) 306 struct vnode *devvp; 307 struct mount *mp; 308 struct proc *p; 309 struct iso_args *argp; 310 { 311 struct iso_mnt *isomp = (struct iso_mnt *)0; 312 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 313 dev_t dev = devvp->v_rdev; 314 int error = EINVAL; 315 int needclose = 0; 316 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 317 int iso_bsize; 318 int iso_blknum; 319 int joliet_level; 320 struct iso_volume_descriptor *vdp; 321 struct iso_supplementary_descriptor *sup; 322 int sess = 0; 323 int ext_attr_length; 324 struct disklabel label; 325 326 if (!ronly) 327 return EROFS; 328 329 /* 330 * Disallow multiple mounts of the same device. 331 * Disallow mounting of a device that is currently in use 332 * (except for root, which might share swap device for miniroot). 333 * Flush out any old buffers remaining from a previous use. 334 */ 335 if ((error = vfs_mountedon(devvp)) != 0) 336 return error; 337 if (vcount(devvp) > 1 && devvp != rootvp) 338 return EBUSY; 339 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 340 return (error); 341 342 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 343 if (error) 344 return error; 345 needclose = 1; 346 347 /* This is the "logical sector size". The standard says this 348 * should be 2048 or the physical sector size on the device, 349 * whichever is greater. For now, we'll just use a constant. 350 */ 351 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 352 353 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, p); 354 if (!error && 355 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 356 /* XXX more sanity checks? */ 357 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 358 } else { 359 /* fallback to old method */ 360 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, p); 361 if (error) 362 sess = 0; /* never mind */ 363 } 364 #ifdef ISO_DEBUG 365 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 366 #endif 367 368 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 369 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 370 iso_bsize, NOCRED, &bp)) != 0) 371 goto out; 372 373 vdp = (struct iso_volume_descriptor *)bp->b_data; 374 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 375 error = EINVAL; 376 goto out; 377 } 378 379 switch (isonum_711(vdp->type)) { 380 case ISO_VD_PRIMARY: 381 if (pribp == NULL) { 382 pribp = bp; 383 bp = NULL; 384 } 385 break; 386 387 case ISO_VD_SUPPLEMENTARY: 388 if (supbp == NULL) { 389 supbp = bp; 390 bp = NULL; 391 } 392 break; 393 394 default: 395 break; 396 } 397 398 if (isonum_711 (vdp->type) == ISO_VD_END) { 399 brelse(bp); 400 bp = NULL; 401 break; 402 } 403 404 if (bp != NULL) { 405 brelse(bp); 406 bp = NULL; 407 } 408 } 409 410 if (pribp == NULL) { 411 error = EINVAL; 412 goto out; 413 } 414 415 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 416 memset(isomp, 0, sizeof *isomp); 417 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 418 error = EINVAL; 419 goto out; 420 } 421 422 isomp->volume_space_size += sess; 423 424 pribp->b_flags |= B_AGE; 425 brelse(pribp); 426 pribp = NULL; 427 428 mp->mnt_data = isomp; 429 mp->mnt_stat.f_fsid.val[0] = (long)dev; 430 mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_CD9660); 431 mp->mnt_maxsymlinklen = 0; 432 mp->mnt_flag |= MNT_LOCAL; 433 mp->mnt_dev_bshift = iso_bsize; 434 mp->mnt_fs_bshift = isomp->im_bshift; 435 isomp->im_mountp = mp; 436 isomp->im_dev = dev; 437 isomp->im_devvp = devvp; 438 439 devvp->v_specmountpoint = mp; 440 441 /* Check the Rock Ridge Extension support */ 442 if (!(argp->flags & ISOFSMNT_NORRIP)) { 443 struct iso_directory_record *rootp; 444 445 if ((error = bread(isomp->im_devvp, 446 (isomp->root_extent + ext_attr_length) << 447 (isomp->im_bshift - DEV_BSHIFT), 448 isomp->logical_block_size, NOCRED, 449 &bp)) != 0) 450 goto out; 451 452 rootp = (struct iso_directory_record *)bp->b_data; 453 454 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 455 argp->flags |= ISOFSMNT_NORRIP; 456 } else { 457 argp->flags &= ~ISOFSMNT_GENS; 458 } 459 460 /* 461 * The contents are valid, 462 * but they will get reread as part of another vnode, so... 463 */ 464 bp->b_flags |= B_AGE; 465 brelse(bp); 466 bp = NULL; 467 } 468 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 469 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 470 471 if (isomp->im_flags & ISOFSMNT_GENS) 472 isomp->iso_ftype = ISO_FTYPE_9660; 473 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 474 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 475 if (argp->flags & ISOFSMNT_NOCASETRANS) 476 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 477 } else 478 isomp->iso_ftype = ISO_FTYPE_RRIP; 479 480 /* Check the Joliet Extension support */ 481 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 482 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 483 supbp != NULL) { 484 joliet_level = 0; 485 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 486 487 if ((isonum_711(sup->flags) & 1) == 0) { 488 if (memcmp(sup->escape, "%/@", 3) == 0) 489 joliet_level = 1; 490 if (memcmp(sup->escape, "%/C", 3) == 0) 491 joliet_level = 2; 492 if (memcmp(sup->escape, "%/E", 3) == 0) 493 joliet_level = 3; 494 } 495 if (joliet_level != 0) { 496 if (iso_makemp(isomp, supbp, NULL) == -1) { 497 error = EINVAL; 498 goto out; 499 } 500 isomp->im_joliet_level = joliet_level; 501 } 502 } 503 504 if (supbp != NULL) { 505 brelse(supbp); 506 supbp = NULL; 507 } 508 509 return 0; 510 out: 511 if (bp) 512 brelse(bp); 513 if (pribp) 514 brelse(pribp); 515 if (supbp) 516 brelse(supbp); 517 if (needclose) { 518 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 519 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 520 VOP_UNLOCK(devvp, 0); 521 } 522 if (isomp) { 523 free(isomp, M_ISOFSMNT); 524 mp->mnt_data = NULL; 525 } 526 return error; 527 } 528 529 /* 530 * Make a filesystem operational. 531 * Nothing to do at the moment. 532 */ 533 /* ARGSUSED */ 534 int 535 cd9660_start(mp, flags, p) 536 struct mount *mp; 537 int flags; 538 struct proc *p; 539 { 540 return 0; 541 } 542 543 /* 544 * unmount system call 545 */ 546 int 547 cd9660_unmount(mp, mntflags, p) 548 struct mount *mp; 549 int mntflags; 550 struct proc *p; 551 { 552 struct iso_mnt *isomp; 553 int error, flags = 0; 554 555 if (mntflags & MNT_FORCE) 556 flags |= FORCECLOSE; 557 #if 0 558 mntflushbuf(mp, 0); 559 if (mntinvalbuf(mp)) 560 return EBUSY; 561 #endif 562 if ((error = vflush(mp, NULLVP, flags)) != 0) 563 return (error); 564 565 isomp = VFSTOISOFS(mp); 566 567 #ifdef ISODEVMAP 568 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 569 iso_dunmap(isomp->im_dev); 570 #endif 571 572 if (isomp->im_devvp->v_type != VBAD) 573 isomp->im_devvp->v_specmountpoint = NULL; 574 575 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 576 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 577 vput(isomp->im_devvp); 578 free(isomp, M_ISOFSMNT); 579 mp->mnt_data = NULL; 580 mp->mnt_flag &= ~MNT_LOCAL; 581 return (error); 582 } 583 584 /* 585 * Return root of a filesystem 586 */ 587 int 588 cd9660_root(mp, vpp) 589 struct mount *mp; 590 struct vnode **vpp; 591 { 592 struct iso_mnt *imp = VFSTOISOFS(mp); 593 struct iso_directory_record *dp = 594 (struct iso_directory_record *)imp->root; 595 ino_t ino = isodirino(dp, imp); 596 597 /* 598 * With RRIP we must use the `.' entry of the root directory. 599 * Simply tell vget, that it's a relocated directory. 600 */ 601 return (cd9660_vget_internal(mp, ino, vpp, 602 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 603 } 604 605 /* 606 * Do operations associated with quotas, not supported 607 */ 608 /* ARGSUSED */ 609 int 610 cd9660_quotactl(mp, cmd, uid, arg, p) 611 struct mount *mp; 612 int cmd; 613 uid_t uid; 614 caddr_t arg; 615 struct proc *p; 616 { 617 618 return (EOPNOTSUPP); 619 } 620 621 /* 622 * Get file system statistics. 623 */ 624 int 625 cd9660_statfs(mp, sbp, p) 626 struct mount *mp; 627 struct statfs *sbp; 628 struct proc *p; 629 { 630 struct iso_mnt *isomp; 631 632 isomp = VFSTOISOFS(mp); 633 634 #ifdef COMPAT_09 635 sbp->f_type = 5; 636 #else 637 sbp->f_type = 0; 638 #endif 639 sbp->f_bsize = isomp->logical_block_size; 640 sbp->f_iosize = sbp->f_bsize; /* XXX */ 641 sbp->f_blocks = isomp->volume_space_size; 642 sbp->f_bfree = 0; /* total free blocks */ 643 sbp->f_bavail = 0; /* blocks free for non superuser */ 644 sbp->f_files = 0; /* total files */ 645 sbp->f_ffree = 0; /* free file nodes */ 646 if (sbp != &mp->mnt_stat) { 647 memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN); 648 memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN); 649 } 650 strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN); 651 /* Use the first spare for flags: */ 652 sbp->f_spare[0] = isomp->im_flags; 653 return 0; 654 } 655 656 /* ARGSUSED */ 657 int 658 cd9660_sync(mp, waitfor, cred, p) 659 struct mount *mp; 660 int waitfor; 661 struct ucred *cred; 662 struct proc *p; 663 { 664 return (0); 665 } 666 667 /* 668 * File handle to vnode 669 * 670 * Have to be really careful about stale file handles: 671 * - check that the inode number is in range 672 * - call iget() to get the locked inode 673 * - check for an unallocated inode (i_mode == 0) 674 * - check that the generation number matches 675 */ 676 677 struct ifid { 678 ushort ifid_len; 679 ushort ifid_pad; 680 int ifid_ino; 681 long ifid_start; 682 }; 683 684 /* ARGSUSED */ 685 int 686 cd9660_fhtovp(mp, fhp, vpp) 687 struct mount *mp; 688 struct fid *fhp; 689 struct vnode **vpp; 690 { 691 struct ifid *ifhp = (struct ifid *)fhp; 692 struct iso_node *ip; 693 struct vnode *nvp; 694 int error; 695 696 #ifdef ISOFS_DBG 697 printf("fhtovp: ino %d, start %ld\n", 698 ifhp->ifid_ino, ifhp->ifid_start); 699 #endif 700 701 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 702 *vpp = NULLVP; 703 return (error); 704 } 705 ip = VTOI(nvp); 706 if (ip->inode.iso_mode == 0) { 707 vput(nvp); 708 *vpp = NULLVP; 709 return (ESTALE); 710 } 711 *vpp = nvp; 712 return (0); 713 } 714 715 /* ARGSUSED */ 716 int 717 cd9660_check_export(mp, nam, exflagsp, credanonp) 718 struct mount *mp; 719 struct mbuf *nam; 720 int *exflagsp; 721 struct ucred **credanonp; 722 { 723 struct netcred *np; 724 struct iso_mnt *imp = VFSTOISOFS(mp); 725 726 #ifdef ISOFS_DBG 727 printf("check_export: ino %d, start %ld\n", 728 ifhp->ifid_ino, ifhp->ifid_start); 729 #endif 730 731 /* 732 * Get the export permission structure for this <mp, client> tuple. 733 */ 734 np = vfs_export_lookup(mp, &imp->im_export, nam); 735 if (np == NULL) 736 return (EACCES); 737 738 *exflagsp = np->netc_exflags; 739 *credanonp = &np->netc_anon; 740 return (0); 741 } 742 743 int 744 cd9660_vget(mp, ino, vpp) 745 struct mount *mp; 746 ino_t ino; 747 struct vnode **vpp; 748 { 749 750 /* 751 * XXXX 752 * It would be nice if we didn't always set the `relocated' flag 753 * and force the extra read, but I don't want to think about fixing 754 * that right now. 755 */ 756 return (cd9660_vget_internal(mp, ino, vpp, 757 #if 0 758 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 759 #else 760 0, 761 #endif 762 NULL)); 763 } 764 765 int 766 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 767 struct mount *mp; 768 ino_t ino; 769 struct vnode **vpp; 770 int relocated; 771 struct iso_directory_record *isodir; 772 { 773 struct iso_mnt *imp; 774 struct iso_node *ip; 775 #ifdef ISODEVMAP 776 struct iso_dnode *dp; 777 #endif 778 struct buf *bp; 779 struct vnode *vp, *nvp; 780 dev_t dev; 781 int error; 782 783 imp = VFSTOISOFS(mp); 784 dev = imp->im_dev; 785 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 786 return (0); 787 788 /* Allocate a new vnode/iso_node. */ 789 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 790 *vpp = NULLVP; 791 return (error); 792 } 793 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 794 memset(ip, 0, sizeof(struct iso_node)); 795 vp->v_data = ip; 796 ip->i_vnode = vp; 797 ip->i_dev = dev; 798 ip->i_number = ino; 799 800 /* 801 * Put it onto its hash chain and lock it so that other requests for 802 * this inode will block if they arrive while we are sleeping waiting 803 * for old data structures to be purged or for the contents of the 804 * disk portion of this inode to be read. 805 */ 806 cd9660_ihashins(ip); 807 808 if (isodir == 0) { 809 int lbn, off; 810 811 lbn = lblkno(imp, ino); 812 if (lbn >= imp->volume_space_size) { 813 vput(vp); 814 printf("fhtovp: lbn exceed volume space %d\n", lbn); 815 return (ESTALE); 816 } 817 818 off = blkoff(imp, ino); 819 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 820 vput(vp); 821 printf("fhtovp: crosses block boundary %d\n", 822 off + ISO_DIRECTORY_RECORD_SIZE); 823 return (ESTALE); 824 } 825 826 error = bread(imp->im_devvp, 827 lbn << (imp->im_bshift - DEV_BSHIFT), 828 imp->logical_block_size, NOCRED, &bp); 829 if (error) { 830 vput(vp); 831 brelse(bp); 832 printf("fhtovp: bread error %d\n",error); 833 return (error); 834 } 835 isodir = (struct iso_directory_record *)(bp->b_data + off); 836 837 if (off + isonum_711(isodir->length) > 838 imp->logical_block_size) { 839 vput(vp); 840 if (bp != 0) 841 brelse(bp); 842 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 843 off +isonum_711(isodir->length), off, 844 isonum_711(isodir->length)); 845 return (ESTALE); 846 } 847 848 #if 0 849 if (isonum_733(isodir->extent) + 850 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 851 if (bp != 0) 852 brelse(bp); 853 printf("fhtovp: file start miss %d vs %d\n", 854 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 855 ifhp->ifid_start); 856 return (ESTALE); 857 } 858 #endif 859 } else 860 bp = 0; 861 862 ip->i_mnt = imp; 863 ip->i_devvp = imp->im_devvp; 864 VREF(ip->i_devvp); 865 866 if (relocated) { 867 /* 868 * On relocated directories we must 869 * read the `.' entry out of a dir. 870 */ 871 ip->iso_start = ino >> imp->im_bshift; 872 if (bp != 0) 873 brelse(bp); 874 if ((error = VOP_BLKATOFF(vp, (off_t)0, NULL, &bp)) != 0) { 875 vput(vp); 876 return (error); 877 } 878 isodir = (struct iso_directory_record *)bp->b_data; 879 } 880 881 ip->iso_extent = isonum_733(isodir->extent); 882 ip->i_size = isonum_733(isodir->size); 883 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 884 885 /* 886 * Setup time stamp, attribute 887 */ 888 vp->v_type = VNON; 889 switch (imp->iso_ftype) { 890 default: /* ISO_FTYPE_9660 */ 891 { 892 struct buf *bp2; 893 int off; 894 if ((imp->im_flags & ISOFSMNT_EXTATT) 895 && (off = isonum_711(isodir->ext_attr_length))) 896 VOP_BLKATOFF(vp, (off_t)-(off << imp->im_bshift), NULL, 897 &bp2); 898 else 899 bp2 = NULL; 900 cd9660_defattr(isodir, ip, bp2); 901 cd9660_deftstamp(isodir, ip, bp2); 902 if (bp2) 903 brelse(bp2); 904 break; 905 } 906 case ISO_FTYPE_RRIP: 907 cd9660_rrip_analyze(isodir, ip, imp); 908 break; 909 } 910 911 if (bp != 0) 912 brelse(bp); 913 914 /* 915 * Initialize the associated vnode 916 */ 917 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 918 case VFIFO: 919 vp->v_op = cd9660_fifoop_p; 920 break; 921 case VCHR: 922 case VBLK: 923 /* 924 * if device, look at device number table for translation 925 */ 926 #ifdef ISODEVMAP 927 if ((dp = iso_dmap(dev, ino, 0)) != NULL) 928 ip->inode.iso_rdev = dp->d_dev; 929 #endif 930 vp->v_op = cd9660_specop_p; 931 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 932 /* 933 * Discard unneeded vnode, but save its iso_node. 934 * Note that the lock is carried over in the iso_node 935 * to the replacement vnode. 936 */ 937 nvp->v_data = vp->v_data; 938 vp->v_data = NULL; 939 VOP_UNLOCK(vp, 0); 940 vp->v_op = spec_vnodeop_p; 941 vrele(vp); 942 vgone(vp); 943 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 944 /* 945 * Reinitialize aliased inode. 946 */ 947 vp = nvp; 948 ip->i_vnode = vp; 949 } 950 break; 951 case VLNK: 952 case VNON: 953 case VSOCK: 954 case VDIR: 955 case VBAD: 956 break; 957 case VREG: 958 uvm_vnp_setsize(vp, ip->i_size); 959 break; 960 } 961 962 if (ip->iso_extent == imp->root_extent) 963 vp->v_flag |= VROOT; 964 965 /* 966 * XXX need generation number? 967 */ 968 969 genfs_node_init(vp, &cd9660_genfsops); 970 *vpp = vp; 971 return (0); 972 } 973 974 /* 975 * Vnode pointer to File handle 976 */ 977 /* ARGSUSED */ 978 int 979 cd9660_vptofh(vp, fhp) 980 struct vnode *vp; 981 struct fid *fhp; 982 { 983 struct iso_node *ip = VTOI(vp); 984 struct ifid *ifhp; 985 986 ifhp = (struct ifid *)fhp; 987 ifhp->ifid_len = sizeof(struct ifid); 988 989 ifhp->ifid_ino = ip->i_number; 990 ifhp->ifid_start = ip->iso_start; 991 992 #ifdef ISOFS_DBG 993 printf("vptofh: ino %d, start %ld\n", 994 ifhp->ifid_ino,ifhp->ifid_start); 995 #endif 996 return 0; 997 } 998 999 int 1000 cd9660_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 1001 int *name; 1002 u_int namelen; 1003 void *oldp; 1004 size_t *oldlenp; 1005 void *newp; 1006 size_t newlen; 1007 struct proc *p; 1008 { 1009 return (EOPNOTSUPP); 1010 } 1011
Indexes created Wed Sep 24 15:09:51 GMT 2025