cd9660_vfsops.c revision 1.1
1 /* $NetBSD: cd9660_vfsops.c,v 1.1 2002/12/23 17:52:09 jdolecek 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 1.1 2002/12/23 17:52:09 jdolecek 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 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 77 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 78 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 79 80 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 81 &cd9660_vnodeop_opv_desc, 82 &cd9660_specop_opv_desc, 83 &cd9660_fifoop_opv_desc, 84 NULL, 85 }; 86 87 struct vfsops cd9660_vfsops = { 88 MOUNT_CD9660, 89 cd9660_mount, 90 cd9660_start, 91 cd9660_unmount, 92 cd9660_root, 93 cd9660_quotactl, 94 cd9660_statfs, 95 cd9660_sync, 96 cd9660_vget, 97 cd9660_fhtovp, 98 cd9660_vptofh, 99 cd9660_init, 100 cd9660_reinit, 101 cd9660_done, 102 cd9660_sysctl, 103 cd9660_mountroot, 104 cd9660_check_export, 105 cd9660_vnodeopv_descs, 106 }; 107 108 struct genfs_ops cd9660_genfsops = { 109 genfs_size, 110 }; 111 112 /* 113 * Called by vfs_mountroot when iso is going to be mounted as root. 114 * 115 * Name is updated by mount(8) after booting. 116 */ 117 #define ROOTNAME "root_device" 118 119 static int iso_makemp __P((struct iso_mnt *isomp, struct buf *bp, int *ea_len)); 120 static int iso_mountfs __P((struct vnode *devvp, struct mount *mp, 121 struct proc *p, struct iso_args *argp)); 122 123 int 124 cd9660_mountroot() 125 { 126 struct mount *mp; 127 struct proc *p = curproc; /* XXX */ 128 int error; 129 struct iso_args args; 130 131 if (root_device->dv_class != DV_DISK) 132 return (ENODEV); 133 134 /* 135 * Get vnodes for swapdev and rootdev. 136 */ 137 if (bdevvp(rootdev, &rootvp)) 138 panic("cd9660_mountroot: can't setup rootvp"); 139 140 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 141 != 0) { 142 vrele(rootvp); 143 return (error); 144 } 145 146 args.flags = ISOFSMNT_ROOT; 147 if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) { 148 mp->mnt_op->vfs_refcount--; 149 vfs_unbusy(mp); 150 free(mp, M_MOUNT); 151 vrele(rootvp); 152 return (error); 153 } 154 simple_lock(&mountlist_slock); 155 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 156 simple_unlock(&mountlist_slock); 157 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 158 vfs_unbusy(mp); 159 inittodr(0); 160 return (0); 161 } 162 163 /* 164 * VFS Operations. 165 * 166 * mount system call 167 */ 168 int 169 cd9660_mount(mp, path, data, ndp, p) 170 struct mount *mp; 171 const char *path; 172 void *data; 173 struct nameidata *ndp; 174 struct proc *p; 175 { 176 struct vnode *devvp; 177 struct iso_args args; 178 size_t size; 179 int error; 180 struct iso_mnt *imp = NULL; 181 182 if (mp->mnt_flag & MNT_GETARGS) { 183 imp = VFSTOISOFS(mp); 184 if (imp == NULL) 185 return EIO; 186 args.fspec = NULL; 187 args.flags = imp->im_flags; 188 vfs_showexport(mp, &args.export, &imp->im_export); 189 return copyout(&args, data, sizeof(args)); 190 } 191 error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)); 192 if (error) 193 return (error); 194 195 if ((mp->mnt_flag & MNT_RDONLY) == 0) 196 return (EROFS); 197 198 /* 199 * If updating, check whether changing from read-only to 200 * read/write; if there is no device name, that's all we do. 201 */ 202 if (mp->mnt_flag & MNT_UPDATE) { 203 imp = VFSTOISOFS(mp); 204 if (args.fspec == 0) 205 return (vfs_export(mp, &imp->im_export, &args.export)); 206 } 207 /* 208 * Not an update, or updating the name: look up the name 209 * and verify that it refers to a sensible block device. 210 */ 211 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 212 if ((error = namei(ndp)) != 0) 213 return (error); 214 devvp = ndp->ni_vp; 215 216 if (devvp->v_type != VBLK) { 217 vrele(devvp); 218 return ENOTBLK; 219 } 220 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 221 vrele(devvp); 222 return ENXIO; 223 } 224 /* 225 * If mount by non-root, then verify that user has necessary 226 * permissions on the device. 227 */ 228 if (p->p_ucred->cr_uid != 0) { 229 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 230 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 231 VOP_UNLOCK(devvp, 0); 232 if (error) { 233 vrele(devvp); 234 return (error); 235 } 236 } 237 if ((mp->mnt_flag & MNT_UPDATE) == 0) 238 error = iso_mountfs(devvp, mp, p, &args); 239 else { 240 if (devvp != imp->im_devvp) 241 error = EINVAL; /* needs translation */ 242 else 243 vrele(devvp); 244 } 245 if (error) { 246 vrele(devvp); 247 return error; 248 } 249 imp = VFSTOISOFS(mp); 250 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 251 memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size); 252 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 253 &size); 254 memset(mp->mnt_stat.f_mntfromname + size, 0, MNAMELEN - size); 255 return 0; 256 } 257 258 /* 259 * Make a mount point from a volume descriptor 260 */ 261 static int 262 iso_makemp(isomp, bp, ea_len) 263 struct iso_mnt *isomp; 264 struct buf *bp; 265 int *ea_len; 266 { 267 struct iso_primary_descriptor *pri; 268 int logical_block_size; 269 struct iso_directory_record *rootp; 270 271 pri = (struct iso_primary_descriptor *)bp->b_data; 272 273 logical_block_size = isonum_723 (pri->logical_block_size); 274 275 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 276 || (logical_block_size & (logical_block_size - 1)) != 0) 277 return -1; 278 279 rootp = (struct iso_directory_record *)pri->root_directory_record; 280 281 isomp->logical_block_size = logical_block_size; 282 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 283 memcpy(isomp->root, rootp, sizeof(isomp->root)); 284 isomp->root_extent = isonum_733 (rootp->extent); 285 isomp->root_size = isonum_733 (rootp->size); 286 isomp->im_joliet_level = 0; 287 288 isomp->im_bmask = logical_block_size - 1; 289 isomp->im_bshift = 0; 290 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 291 isomp->im_bshift++; 292 293 if (ea_len != NULL) 294 *ea_len = isonum_711(rootp->ext_attr_length); 295 296 return 0; 297 } 298 299 /* 300 * Common code for mount and mountroot 301 */ 302 static int 303 iso_mountfs(devvp, mp, p, argp) 304 struct vnode *devvp; 305 struct mount *mp; 306 struct proc *p; 307 struct iso_args *argp; 308 { 309 struct iso_mnt *isomp = (struct iso_mnt *)0; 310 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 311 dev_t dev = devvp->v_rdev; 312 int error = EINVAL; 313 int needclose = 0; 314 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 315 int iso_bsize; 316 int iso_blknum; 317 int joliet_level; 318 struct iso_volume_descriptor *vdp; 319 struct iso_supplementary_descriptor *sup; 320 int sess = 0; 321 int ext_attr_length; 322 struct disklabel label; 323 324 if (!ronly) 325 return EROFS; 326 327 /* 328 * Disallow multiple mounts of the same device. 329 * Disallow mounting of a device that is currently in use 330 * (except for root, which might share swap device for miniroot). 331 * Flush out any old buffers remaining from a previous use. 332 */ 333 if ((error = vfs_mountedon(devvp)) != 0) 334 return error; 335 if (vcount(devvp) > 1 && devvp != rootvp) 336 return EBUSY; 337 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 338 return (error); 339 340 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 341 if (error) 342 return error; 343 needclose = 1; 344 345 /* This is the "logical sector size". The standard says this 346 * should be 2048 or the physical sector size on the device, 347 * whichever is greater. For now, we'll just use a constant. 348 */ 349 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 350 351 error = VOP_IOCTL(devvp, DIOCGDINFO, (caddr_t)&label, FREAD, FSCRED, p); 352 if (!error && 353 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 354 /* XXX more sanity checks? */ 355 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 356 } else { 357 /* fallback to old method */ 358 error = VOP_IOCTL(devvp, CDIOREADMSADDR, (caddr_t)&sess, 0, 359 FSCRED, p); 360 if (error) 361 sess = 0; /* never mind */ 362 } 363 #ifdef DEBUG 364 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 365 #endif 366 367 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 368 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 369 iso_bsize, NOCRED, &bp)) != 0) 370 goto out; 371 372 vdp = (struct iso_volume_descriptor *)bp->b_data; 373 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 374 error = EINVAL; 375 goto out; 376 } 377 378 switch (isonum_711(vdp->type)) { 379 case ISO_VD_PRIMARY: 380 if (pribp == NULL) { 381 pribp = bp; 382 bp = NULL; 383 } 384 break; 385 386 case ISO_VD_SUPPLEMENTARY: 387 if (supbp == NULL) { 388 supbp = bp; 389 bp = NULL; 390 } 391 break; 392 393 default: 394 break; 395 } 396 397 if (isonum_711 (vdp->type) == ISO_VD_END) { 398 brelse(bp); 399 bp = NULL; 400 break; 401 } 402 403 if (bp != NULL) { 404 brelse(bp); 405 bp = NULL; 406 } 407 } 408 409 if (pribp == NULL) { 410 error = EINVAL; 411 goto out; 412 } 413 414 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 415 memset((caddr_t)isomp, 0, sizeof *isomp); 416 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 417 error = EINVAL; 418 goto out; 419 } 420 421 isomp->volume_space_size += sess; 422 423 pribp->b_flags |= B_AGE; 424 brelse(pribp); 425 pribp = NULL; 426 427 mp->mnt_data = isomp; 428 mp->mnt_stat.f_fsid.val[0] = (long)dev; 429 mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_CD9660); 430 mp->mnt_maxsymlinklen = 0; 431 mp->mnt_flag |= MNT_LOCAL; 432 mp->mnt_dev_bshift = iso_bsize; 433 mp->mnt_fs_bshift = isomp->im_bshift; 434 isomp->im_mountp = mp; 435 isomp->im_dev = dev; 436 isomp->im_devvp = devvp; 437 438 devvp->v_specmountpoint = mp; 439 440 /* Check the Rock Ridge Extension support */ 441 if (!(argp->flags & ISOFSMNT_NORRIP)) { 442 struct iso_directory_record *rootp; 443 444 if ((error = bread(isomp->im_devvp, 445 (isomp->root_extent + ext_attr_length) << 446 (isomp->im_bshift - DEV_BSHIFT), 447 isomp->logical_block_size, NOCRED, 448 &bp)) != 0) 449 goto out; 450 451 rootp = (struct iso_directory_record *)bp->b_data; 452 453 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 454 argp->flags |= ISOFSMNT_NORRIP; 455 } else { 456 argp->flags &= ~ISOFSMNT_GENS; 457 } 458 459 /* 460 * The contents are valid, 461 * but they will get reread as part of another vnode, so... 462 */ 463 bp->b_flags |= B_AGE; 464 brelse(bp); 465 bp = NULL; 466 } 467 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 468 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 469 470 if (isomp->im_flags & ISOFSMNT_GENS) 471 isomp->iso_ftype = ISO_FTYPE_9660; 472 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 473 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 474 if (argp->flags & ISOFSMNT_NOCASETRANS) 475 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 476 } else 477 isomp->iso_ftype = ISO_FTYPE_RRIP; 478 479 /* Check the Joliet Extension support */ 480 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 481 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 482 supbp != NULL) { 483 joliet_level = 0; 484 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 485 486 if ((isonum_711(sup->flags) & 1) == 0) { 487 if (memcmp(sup->escape, "%/@", 3) == 0) 488 joliet_level = 1; 489 if (memcmp(sup->escape, "%/C", 3) == 0) 490 joliet_level = 2; 491 if (memcmp(sup->escape, "%/E", 3) == 0) 492 joliet_level = 3; 493 } 494 if (joliet_level != 0) { 495 if (iso_makemp(isomp, supbp, NULL) == -1) { 496 error = EINVAL; 497 goto out; 498 } 499 isomp->im_joliet_level = joliet_level; 500 } 501 } 502 503 if (supbp != NULL) { 504 brelse(supbp); 505 supbp = NULL; 506 } 507 508 return 0; 509 out: 510 if (bp) 511 brelse(bp); 512 if (pribp) 513 brelse(pribp); 514 if (supbp) 515 brelse(supbp); 516 if (needclose) { 517 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 518 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 519 VOP_UNLOCK(devvp, 0); 520 } 521 if (isomp) { 522 free((caddr_t)isomp, M_ISOFSMNT); 523 mp->mnt_data = NULL; 524 } 525 return error; 526 } 527 528 /* 529 * Make a filesystem operational. 530 * Nothing to do at the moment. 531 */ 532 /* ARGSUSED */ 533 int 534 cd9660_start(mp, flags, p) 535 struct mount *mp; 536 int flags; 537 struct proc *p; 538 { 539 return 0; 540 } 541 542 /* 543 * unmount system call 544 */ 545 int 546 cd9660_unmount(mp, mntflags, p) 547 struct mount *mp; 548 int mntflags; 549 struct proc *p; 550 { 551 struct iso_mnt *isomp; 552 int error, flags = 0; 553 554 if (mntflags & MNT_FORCE) 555 flags |= FORCECLOSE; 556 #if 0 557 mntflushbuf(mp, 0); 558 if (mntinvalbuf(mp)) 559 return EBUSY; 560 #endif 561 if ((error = vflush(mp, NULLVP, flags)) != 0) 562 return (error); 563 564 isomp = VFSTOISOFS(mp); 565 566 #ifdef ISODEVMAP 567 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 568 iso_dunmap(isomp->im_dev); 569 #endif 570 571 if (isomp->im_devvp->v_type != VBAD) 572 isomp->im_devvp->v_specmountpoint = NULL; 573 574 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 575 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 576 vput(isomp->im_devvp); 577 free((caddr_t)isomp, M_ISOFSMNT); 578 mp->mnt_data = NULL; 579 mp->mnt_flag &= ~MNT_LOCAL; 580 return (error); 581 } 582 583 /* 584 * Return root of a filesystem 585 */ 586 int 587 cd9660_root(mp, vpp) 588 struct mount *mp; 589 struct vnode **vpp; 590 { 591 struct iso_mnt *imp = VFSTOISOFS(mp); 592 struct iso_directory_record *dp = 593 (struct iso_directory_record *)imp->root; 594 ino_t ino = isodirino(dp, imp); 595 596 /* 597 * With RRIP we must use the `.' entry of the root directory. 598 * Simply tell vget, that it's a relocated directory. 599 */ 600 return (cd9660_vget_internal(mp, ino, vpp, 601 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 602 } 603 604 /* 605 * Do operations associated with quotas, not supported 606 */ 607 /* ARGSUSED */ 608 int 609 cd9660_quotactl(mp, cmd, uid, arg, p) 610 struct mount *mp; 611 int cmd; 612 uid_t uid; 613 caddr_t arg; 614 struct proc *p; 615 { 616 617 return (EOPNOTSUPP); 618 } 619 620 /* 621 * Get file system statistics. 622 */ 623 int 624 cd9660_statfs(mp, sbp, p) 625 struct mount *mp; 626 struct statfs *sbp; 627 struct proc *p; 628 { 629 struct iso_mnt *isomp; 630 631 isomp = VFSTOISOFS(mp); 632 633 #ifdef COMPAT_09 634 sbp->f_type = 5; 635 #else 636 sbp->f_type = 0; 637 #endif 638 sbp->f_bsize = isomp->logical_block_size; 639 sbp->f_iosize = sbp->f_bsize; /* XXX */ 640 sbp->f_blocks = isomp->volume_space_size; 641 sbp->f_bfree = 0; /* total free blocks */ 642 sbp->f_bavail = 0; /* blocks free for non superuser */ 643 sbp->f_files = 0; /* total files */ 644 sbp->f_ffree = 0; /* free file nodes */ 645 if (sbp != &mp->mnt_stat) { 646 memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN); 647 memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN); 648 } 649 strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN); 650 /* Use the first spare for flags: */ 651 sbp->f_spare[0] = isomp->im_flags; 652 return 0; 653 } 654 655 /* ARGSUSED */ 656 int 657 cd9660_sync(mp, waitfor, cred, p) 658 struct mount *mp; 659 int waitfor; 660 struct ucred *cred; 661 struct proc *p; 662 { 663 return (0); 664 } 665 666 /* 667 * File handle to vnode 668 * 669 * Have to be really careful about stale file handles: 670 * - check that the inode number is in range 671 * - call iget() to get the locked inode 672 * - check for an unallocated inode (i_mode == 0) 673 * - check that the generation number matches 674 */ 675 676 struct ifid { 677 ushort ifid_len; 678 ushort ifid_pad; 679 int ifid_ino; 680 long ifid_start; 681 }; 682 683 /* ARGSUSED */ 684 int 685 cd9660_fhtovp(mp, fhp, vpp) 686 struct mount *mp; 687 struct fid *fhp; 688 struct vnode **vpp; 689 { 690 struct ifid *ifhp = (struct ifid *)fhp; 691 struct iso_node *ip; 692 struct vnode *nvp; 693 int error; 694 695 #ifdef ISOFS_DBG 696 printf("fhtovp: ino %d, start %ld\n", 697 ifhp->ifid_ino, ifhp->ifid_start); 698 #endif 699 700 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 701 *vpp = NULLVP; 702 return (error); 703 } 704 ip = VTOI(nvp); 705 if (ip->inode.iso_mode == 0) { 706 vput(nvp); 707 *vpp = NULLVP; 708 return (ESTALE); 709 } 710 *vpp = nvp; 711 return (0); 712 } 713 714 /* ARGSUSED */ 715 int 716 cd9660_check_export(mp, nam, exflagsp, credanonp) 717 struct mount *mp; 718 struct mbuf *nam; 719 int *exflagsp; 720 struct ucred **credanonp; 721 { 722 struct netcred *np; 723 struct iso_mnt *imp = VFSTOISOFS(mp); 724 725 #ifdef ISOFS_DBG 726 printf("check_export: ino %d, start %ld\n", 727 ifhp->ifid_ino, ifhp->ifid_start); 728 #endif 729 730 /* 731 * Get the export permission structure for this <mp, client> tuple. 732 */ 733 np = vfs_export_lookup(mp, &imp->im_export, nam); 734 if (np == NULL) 735 return (EACCES); 736 737 *exflagsp = np->netc_exflags; 738 *credanonp = &np->netc_anon; 739 return (0); 740 } 741 742 int 743 cd9660_vget(mp, ino, vpp) 744 struct mount *mp; 745 ino_t ino; 746 struct vnode **vpp; 747 { 748 749 /* 750 * XXXX 751 * It would be nice if we didn't always set the `relocated' flag 752 * and force the extra read, but I don't want to think about fixing 753 * that right now. 754 */ 755 return (cd9660_vget_internal(mp, ino, vpp, 756 #if 0 757 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 758 #else 759 0, 760 #endif 761 NULL)); 762 } 763 764 int 765 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 766 struct mount *mp; 767 ino_t ino; 768 struct vnode **vpp; 769 int relocated; 770 struct iso_directory_record *isodir; 771 { 772 struct iso_mnt *imp; 773 struct iso_node *ip; 774 #ifdef ISODEVMAP 775 struct iso_dnode *dp; 776 #endif 777 struct buf *bp; 778 struct vnode *vp, *nvp; 779 dev_t dev; 780 int error; 781 782 imp = VFSTOISOFS(mp); 783 dev = imp->im_dev; 784 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 785 return (0); 786 787 /* Allocate a new vnode/iso_node. */ 788 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 789 *vpp = NULLVP; 790 return (error); 791 } 792 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 793 memset((caddr_t)ip, 0, sizeof(struct iso_node)); 794 vp->v_data = ip; 795 ip->i_vnode = vp; 796 ip->i_dev = dev; 797 ip->i_number = ino; 798 799 /* 800 * Put it onto its hash chain and lock it so that other requests for 801 * this inode will block if they arrive while we are sleeping waiting 802 * for old data structures to be purged or for the contents of the 803 * disk portion of this inode to be read. 804 */ 805 cd9660_ihashins(ip); 806 807 if (isodir == 0) { 808 int lbn, off; 809 810 lbn = lblkno(imp, ino); 811 if (lbn >= imp->volume_space_size) { 812 vput(vp); 813 printf("fhtovp: lbn exceed volume space %d\n", lbn); 814 return (ESTALE); 815 } 816 817 off = blkoff(imp, ino); 818 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 819 vput(vp); 820 printf("fhtovp: crosses block boundary %d\n", 821 off + ISO_DIRECTORY_RECORD_SIZE); 822 return (ESTALE); 823 } 824 825 error = bread(imp->im_devvp, 826 lbn << (imp->im_bshift - DEV_BSHIFT), 827 imp->logical_block_size, NOCRED, &bp); 828 if (error) { 829 vput(vp); 830 brelse(bp); 831 printf("fhtovp: bread error %d\n",error); 832 return (error); 833 } 834 isodir = (struct iso_directory_record *)(bp->b_data + off); 835 836 if (off + isonum_711(isodir->length) > 837 imp->logical_block_size) { 838 vput(vp); 839 if (bp != 0) 840 brelse(bp); 841 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 842 off +isonum_711(isodir->length), off, 843 isonum_711(isodir->length)); 844 return (ESTALE); 845 } 846 847 #if 0 848 if (isonum_733(isodir->extent) + 849 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 850 if (bp != 0) 851 brelse(bp); 852 printf("fhtovp: file start miss %d vs %d\n", 853 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 854 ifhp->ifid_start); 855 return (ESTALE); 856 } 857 #endif 858 } else 859 bp = 0; 860 861 ip->i_mnt = imp; 862 ip->i_devvp = imp->im_devvp; 863 VREF(ip->i_devvp); 864 865 if (relocated) { 866 /* 867 * On relocated directories we must 868 * read the `.' entry out of a dir. 869 */ 870 ip->iso_start = ino >> imp->im_bshift; 871 if (bp != 0) 872 brelse(bp); 873 if ((error = VOP_BLKATOFF(vp, (off_t)0, NULL, &bp)) != 0) { 874 vput(vp); 875 return (error); 876 } 877 isodir = (struct iso_directory_record *)bp->b_data; 878 } 879 880 ip->iso_extent = isonum_733(isodir->extent); 881 ip->i_size = isonum_733(isodir->size); 882 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 883 884 /* 885 * Setup time stamp, attribute 886 */ 887 vp->v_type = VNON; 888 switch (imp->iso_ftype) { 889 default: /* ISO_FTYPE_9660 */ 890 { 891 struct buf *bp2; 892 int off; 893 if ((imp->im_flags & ISOFSMNT_EXTATT) 894 && (off = isonum_711(isodir->ext_attr_length))) 895 VOP_BLKATOFF(vp, (off_t)-(off << imp->im_bshift), NULL, 896 &bp2); 897 else 898 bp2 = NULL; 899 cd9660_defattr(isodir, ip, bp2); 900 cd9660_deftstamp(isodir, ip, bp2); 901 if (bp2) 902 brelse(bp2); 903 break; 904 } 905 case ISO_FTYPE_RRIP: 906 cd9660_rrip_analyze(isodir, ip, imp); 907 break; 908 } 909 910 if (bp != 0) 911 brelse(bp); 912 913 /* 914 * Initialize the associated vnode 915 */ 916 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 917 case VFIFO: 918 vp->v_op = cd9660_fifoop_p; 919 break; 920 case VCHR: 921 case VBLK: 922 /* 923 * if device, look at device number table for translation 924 */ 925 #ifdef ISODEVMAP 926 if ((dp = iso_dmap(dev, ino, 0)) != NULL) 927 ip->inode.iso_rdev = dp->d_dev; 928 #endif 929 vp->v_op = cd9660_specop_p; 930 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 931 /* 932 * Discard unneeded vnode, but save its iso_node. 933 * Note that the lock is carried over in the iso_node 934 * to the replacement vnode. 935 */ 936 nvp->v_data = vp->v_data; 937 vp->v_data = NULL; 938 VOP_UNLOCK(vp, 0); 939 vp->v_op = spec_vnodeop_p; 940 vrele(vp); 941 vgone(vp); 942 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 943 /* 944 * Reinitialize aliased inode. 945 */ 946 vp = nvp; 947 ip->i_vnode = vp; 948 } 949 break; 950 case VLNK: 951 case VNON: 952 case VSOCK: 953 case VDIR: 954 case VBAD: 955 break; 956 case VREG: 957 uvm_vnp_setsize(vp, ip->i_size); 958 break; 959 } 960 961 if (ip->iso_extent == imp->root_extent) 962 vp->v_flag |= VROOT; 963 964 /* 965 * XXX need generation number? 966 */ 967 968 genfs_node_init(vp, &cd9660_genfsops); 969 *vpp = vp; 970 return (0); 971 } 972 973 /* 974 * Vnode pointer to File handle 975 */ 976 /* ARGSUSED */ 977 int 978 cd9660_vptofh(vp, fhp) 979 struct vnode *vp; 980 struct fid *fhp; 981 { 982 struct iso_node *ip = VTOI(vp); 983 struct ifid *ifhp; 984 985 ifhp = (struct ifid *)fhp; 986 ifhp->ifid_len = sizeof(struct ifid); 987 988 ifhp->ifid_ino = ip->i_number; 989 ifhp->ifid_start = ip->iso_start; 990 991 #ifdef ISOFS_DBG 992 printf("vptofh: ino %d, start %ld\n", 993 ifhp->ifid_ino,ifhp->ifid_start); 994 #endif 995 return 0; 996 } 997 998 int 999 cd9660_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 1000 int *name; 1001 u_int namelen; 1002 void *oldp; 1003 size_t *oldlenp; 1004 void *newp; 1005 size_t newlen; 1006 struct proc *p; 1007 { 1008 return (EOPNOTSUPP); 1009 } 1010
Indexes created Wed Sep 24 14:09:57 GMT 2025