cd9660_vfsops.c revision 1.9
1 /* $NetBSD: cd9660_vfsops.c,v 1.9 2003/08/07 16:31:35 agc 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 1.9 2003/08/07 16:31:35 agc Exp $"); 41 42 #if defined(_KERNEL_OPT) 43 #include "opt_compat_netbsd.h" 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/namei.h> 49 #include <sys/proc.h> 50 #include <sys/kernel.h> 51 #include <sys/vnode.h> 52 #include <miscfs/specfs/specdev.h> 53 #include <sys/mount.h> 54 #include <sys/buf.h> 55 #include <sys/file.h> 56 #include <sys/disklabel.h> 57 #include <sys/device.h> 58 #include <sys/ioctl.h> 59 #include <sys/cdio.h> 60 #include <sys/errno.h> 61 #include <sys/malloc.h> 62 #include <sys/pool.h> 63 #include <sys/stat.h> 64 #include <sys/conf.h> 65 66 #include <fs/cd9660/iso.h> 67 #include <fs/cd9660/cd9660_extern.h> 68 #include <fs/cd9660/iso_rrip.h> 69 #include <fs/cd9660/cd9660_node.h> 70 #include <fs/cd9660/cd9660_mount.h> 71 72 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 73 74 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 75 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 76 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 77 78 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 79 &cd9660_vnodeop_opv_desc, 80 &cd9660_specop_opv_desc, 81 &cd9660_fifoop_opv_desc, 82 NULL, 83 }; 84 85 struct vfsops cd9660_vfsops = { 86 MOUNT_CD9660, 87 cd9660_mount, 88 cd9660_start, 89 cd9660_unmount, 90 cd9660_root, 91 cd9660_quotactl, 92 cd9660_statfs, 93 cd9660_sync, 94 cd9660_vget, 95 cd9660_fhtovp, 96 cd9660_vptofh, 97 cd9660_init, 98 cd9660_reinit, 99 cd9660_done, 100 cd9660_sysctl, 101 cd9660_mountroot, 102 cd9660_check_export, 103 cd9660_vnodeopv_descs, 104 }; 105 106 struct genfs_ops cd9660_genfsops = { 107 genfs_size, 108 }; 109 110 /* 111 * Called by vfs_mountroot when iso is going to be mounted as root. 112 * 113 * Name is updated by mount(8) after booting. 114 */ 115 #define ROOTNAME "root_device" 116 117 static int iso_makemp __P((struct iso_mnt *isomp, struct buf *bp, int *ea_len)); 118 static int iso_mountfs __P((struct vnode *devvp, struct mount *mp, 119 struct proc *p, struct iso_args *argp)); 120 121 int 122 cd9660_mountroot() 123 { 124 struct mount *mp; 125 struct proc *p = curproc; /* XXX */ 126 int error; 127 struct iso_args args; 128 129 if (root_device->dv_class != DV_DISK) 130 return (ENODEV); 131 132 /* 133 * Get vnodes for swapdev and rootdev. 134 */ 135 if (bdevvp(rootdev, &rootvp)) 136 panic("cd9660_mountroot: can't setup rootvp"); 137 138 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 139 != 0) { 140 vrele(rootvp); 141 return (error); 142 } 143 144 args.flags = ISOFSMNT_ROOT; 145 if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) { 146 mp->mnt_op->vfs_refcount--; 147 vfs_unbusy(mp); 148 free(mp, M_MOUNT); 149 vrele(rootvp); 150 return (error); 151 } 152 simple_lock(&mountlist_slock); 153 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 154 simple_unlock(&mountlist_slock); 155 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 156 vfs_unbusy(mp); 157 inittodr(0); 158 return (0); 159 } 160 161 /* 162 * VFS Operations. 163 * 164 * mount system call 165 */ 166 int 167 cd9660_mount(mp, path, data, ndp, p) 168 struct mount *mp; 169 const char *path; 170 void *data; 171 struct nameidata *ndp; 172 struct proc *p; 173 { 174 struct vnode *devvp; 175 struct iso_args args; 176 int error; 177 struct iso_mnt *imp = NULL; 178 179 if (mp->mnt_flag & MNT_GETARGS) { 180 imp = VFSTOISOFS(mp); 181 if (imp == NULL) 182 return EIO; 183 args.fspec = NULL; 184 args.flags = imp->im_flags; 185 vfs_showexport(mp, &args.export, &imp->im_export); 186 return copyout(&args, data, sizeof(args)); 187 } 188 error = copyin(data, &args, sizeof (struct iso_args)); 189 if (error) 190 return (error); 191 192 if ((mp->mnt_flag & MNT_RDONLY) == 0) 193 return (EROFS); 194 195 /* 196 * If updating, check whether changing from read-only to 197 * read/write; if there is no device name, that's all we do. 198 */ 199 if (mp->mnt_flag & MNT_UPDATE) { 200 imp = VFSTOISOFS(mp); 201 if (args.fspec == 0) 202 return (vfs_export(mp, &imp->im_export, &args.export)); 203 } 204 /* 205 * Not an update, or updating the name: look up the name 206 * and verify that it refers to a sensible block device. 207 */ 208 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 209 if ((error = namei(ndp)) != 0) 210 return (error); 211 devvp = ndp->ni_vp; 212 213 if (devvp->v_type != VBLK) { 214 vrele(devvp); 215 return ENOTBLK; 216 } 217 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 218 vrele(devvp); 219 return ENXIO; 220 } 221 /* 222 * If mount by non-root, then verify that user has necessary 223 * permissions on the device. 224 */ 225 if (p->p_ucred->cr_uid != 0) { 226 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 227 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 228 VOP_UNLOCK(devvp, 0); 229 if (error) { 230 vrele(devvp); 231 return (error); 232 } 233 } 234 if ((mp->mnt_flag & MNT_UPDATE) == 0) 235 error = iso_mountfs(devvp, mp, p, &args); 236 else { 237 if (devvp != imp->im_devvp) 238 error = EINVAL; /* needs translation */ 239 else 240 vrele(devvp); 241 } 242 if (error) { 243 vrele(devvp); 244 return error; 245 } 246 imp = VFSTOISOFS(mp); 247 return set_statfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 248 mp, p); 249 } 250 251 /* 252 * Make a mount point from a volume descriptor 253 */ 254 static int 255 iso_makemp(isomp, bp, ea_len) 256 struct iso_mnt *isomp; 257 struct buf *bp; 258 int *ea_len; 259 { 260 struct iso_primary_descriptor *pri; 261 int logical_block_size; 262 struct iso_directory_record *rootp; 263 264 pri = (struct iso_primary_descriptor *)bp->b_data; 265 266 logical_block_size = isonum_723 (pri->logical_block_size); 267 268 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 269 || (logical_block_size & (logical_block_size - 1)) != 0) 270 return -1; 271 272 rootp = (struct iso_directory_record *)pri->root_directory_record; 273 274 isomp->logical_block_size = logical_block_size; 275 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 276 memcpy(isomp->root, rootp, sizeof(isomp->root)); 277 isomp->root_extent = isonum_733 (rootp->extent); 278 isomp->root_size = isonum_733 (rootp->size); 279 isomp->im_joliet_level = 0; 280 281 isomp->im_bmask = logical_block_size - 1; 282 isomp->im_bshift = 0; 283 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 284 isomp->im_bshift++; 285 286 if (ea_len != NULL) 287 *ea_len = isonum_711(rootp->ext_attr_length); 288 289 return 0; 290 } 291 292 /* 293 * Common code for mount and mountroot 294 */ 295 static int 296 iso_mountfs(devvp, mp, p, argp) 297 struct vnode *devvp; 298 struct mount *mp; 299 struct proc *p; 300 struct iso_args *argp; 301 { 302 struct iso_mnt *isomp = (struct iso_mnt *)0; 303 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 304 dev_t dev = devvp->v_rdev; 305 int error = EINVAL; 306 int needclose = 0; 307 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 308 int iso_bsize; 309 int iso_blknum; 310 int joliet_level; 311 struct iso_volume_descriptor *vdp; 312 struct iso_supplementary_descriptor *sup; 313 int sess = 0; 314 int ext_attr_length; 315 struct disklabel label; 316 317 if (!ronly) 318 return EROFS; 319 320 /* 321 * Disallow multiple mounts of the same device. 322 * Disallow mounting of a device that is currently in use 323 * (except for root, which might share swap device for miniroot). 324 * Flush out any old buffers remaining from a previous use. 325 */ 326 if ((error = vfs_mountedon(devvp)) != 0) 327 return error; 328 if (vcount(devvp) > 1 && devvp != rootvp) 329 return EBUSY; 330 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 331 return (error); 332 333 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 334 if (error) 335 return error; 336 needclose = 1; 337 338 /* This is the "logical sector size". The standard says this 339 * should be 2048 or the physical sector size on the device, 340 * whichever is greater. For now, we'll just use a constant. 341 */ 342 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 343 344 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, p); 345 if (!error && 346 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 347 /* XXX more sanity checks? */ 348 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 349 } else { 350 /* fallback to old method */ 351 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, p); 352 if (error) 353 sess = 0; /* never mind */ 354 } 355 #ifdef ISO_DEBUG 356 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 357 #endif 358 359 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 360 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 361 iso_bsize, NOCRED, &bp)) != 0) 362 goto out; 363 364 vdp = (struct iso_volume_descriptor *)bp->b_data; 365 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 366 error = EINVAL; 367 goto out; 368 } 369 370 switch (isonum_711(vdp->type)) { 371 case ISO_VD_PRIMARY: 372 if (pribp == NULL) { 373 pribp = bp; 374 bp = NULL; 375 } 376 break; 377 378 case ISO_VD_SUPPLEMENTARY: 379 if (supbp == NULL) { 380 supbp = bp; 381 bp = NULL; 382 } 383 break; 384 385 default: 386 break; 387 } 388 389 if (isonum_711 (vdp->type) == ISO_VD_END) { 390 brelse(bp); 391 bp = NULL; 392 break; 393 } 394 395 if (bp != NULL) { 396 brelse(bp); 397 bp = NULL; 398 } 399 } 400 401 if (pribp == NULL) { 402 error = EINVAL; 403 goto out; 404 } 405 406 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 407 memset(isomp, 0, sizeof *isomp); 408 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 409 error = EINVAL; 410 goto out; 411 } 412 413 isomp->volume_space_size += sess; 414 415 pribp->b_flags |= B_AGE; 416 brelse(pribp); 417 pribp = NULL; 418 419 mp->mnt_data = isomp; 420 mp->mnt_stat.f_fsid.val[0] = (long)dev; 421 mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_CD9660); 422 mp->mnt_maxsymlinklen = 0; 423 mp->mnt_flag |= MNT_LOCAL; 424 mp->mnt_dev_bshift = iso_bsize; 425 mp->mnt_fs_bshift = isomp->im_bshift; 426 isomp->im_mountp = mp; 427 isomp->im_dev = dev; 428 isomp->im_devvp = devvp; 429 430 devvp->v_specmountpoint = mp; 431 432 /* Check the Rock Ridge Extension support */ 433 if (!(argp->flags & ISOFSMNT_NORRIP)) { 434 struct iso_directory_record *rootp; 435 436 if ((error = bread(isomp->im_devvp, 437 (isomp->root_extent + ext_attr_length) << 438 (isomp->im_bshift - DEV_BSHIFT), 439 isomp->logical_block_size, NOCRED, 440 &bp)) != 0) 441 goto out; 442 443 rootp = (struct iso_directory_record *)bp->b_data; 444 445 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 446 argp->flags |= ISOFSMNT_NORRIP; 447 } else { 448 argp->flags &= ~ISOFSMNT_GENS; 449 } 450 451 /* 452 * The contents are valid, 453 * but they will get reread as part of another vnode, so... 454 */ 455 bp->b_flags |= B_AGE; 456 brelse(bp); 457 bp = NULL; 458 } 459 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 460 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 461 462 if (isomp->im_flags & ISOFSMNT_GENS) 463 isomp->iso_ftype = ISO_FTYPE_9660; 464 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 465 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 466 if (argp->flags & ISOFSMNT_NOCASETRANS) 467 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 468 } else 469 isomp->iso_ftype = ISO_FTYPE_RRIP; 470 471 /* Check the Joliet Extension support */ 472 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 473 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 474 supbp != NULL) { 475 joliet_level = 0; 476 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 477 478 if ((isonum_711(sup->flags) & 1) == 0) { 479 if (memcmp(sup->escape, "%/@", 3) == 0) 480 joliet_level = 1; 481 if (memcmp(sup->escape, "%/C", 3) == 0) 482 joliet_level = 2; 483 if (memcmp(sup->escape, "%/E", 3) == 0) 484 joliet_level = 3; 485 } 486 if (joliet_level != 0) { 487 if (iso_makemp(isomp, supbp, NULL) == -1) { 488 error = EINVAL; 489 goto out; 490 } 491 isomp->im_joliet_level = joliet_level; 492 } 493 } 494 495 if (supbp != NULL) { 496 brelse(supbp); 497 supbp = NULL; 498 } 499 500 return 0; 501 out: 502 if (bp) 503 brelse(bp); 504 if (pribp) 505 brelse(pribp); 506 if (supbp) 507 brelse(supbp); 508 if (needclose) { 509 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 510 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 511 VOP_UNLOCK(devvp, 0); 512 } 513 if (isomp) { 514 free(isomp, M_ISOFSMNT); 515 mp->mnt_data = NULL; 516 } 517 return error; 518 } 519 520 /* 521 * Make a filesystem operational. 522 * Nothing to do at the moment. 523 */ 524 /* ARGSUSED */ 525 int 526 cd9660_start(mp, flags, p) 527 struct mount *mp; 528 int flags; 529 struct proc *p; 530 { 531 return 0; 532 } 533 534 /* 535 * unmount system call 536 */ 537 int 538 cd9660_unmount(mp, mntflags, p) 539 struct mount *mp; 540 int mntflags; 541 struct proc *p; 542 { 543 struct iso_mnt *isomp; 544 int error, flags = 0; 545 546 if (mntflags & MNT_FORCE) 547 flags |= FORCECLOSE; 548 #if 0 549 mntflushbuf(mp, 0); 550 if (mntinvalbuf(mp)) 551 return EBUSY; 552 #endif 553 if ((error = vflush(mp, NULLVP, flags)) != 0) 554 return (error); 555 556 isomp = VFSTOISOFS(mp); 557 558 #ifdef ISODEVMAP 559 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 560 iso_dunmap(isomp->im_dev); 561 #endif 562 563 if (isomp->im_devvp->v_type != VBAD) 564 isomp->im_devvp->v_specmountpoint = NULL; 565 566 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 567 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 568 vput(isomp->im_devvp); 569 free(isomp, M_ISOFSMNT); 570 mp->mnt_data = NULL; 571 mp->mnt_flag &= ~MNT_LOCAL; 572 return (error); 573 } 574 575 /* 576 * Return root of a filesystem 577 */ 578 int 579 cd9660_root(mp, vpp) 580 struct mount *mp; 581 struct vnode **vpp; 582 { 583 struct iso_mnt *imp = VFSTOISOFS(mp); 584 struct iso_directory_record *dp = 585 (struct iso_directory_record *)imp->root; 586 ino_t ino = isodirino(dp, imp); 587 588 /* 589 * With RRIP we must use the `.' entry of the root directory. 590 * Simply tell vget, that it's a relocated directory. 591 */ 592 return (cd9660_vget_internal(mp, ino, vpp, 593 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 594 } 595 596 /* 597 * Do operations associated with quotas, not supported 598 */ 599 /* ARGSUSED */ 600 int 601 cd9660_quotactl(mp, cmd, uid, arg, p) 602 struct mount *mp; 603 int cmd; 604 uid_t uid; 605 caddr_t arg; 606 struct proc *p; 607 { 608 609 return (EOPNOTSUPP); 610 } 611 612 /* 613 * Get file system statistics. 614 */ 615 int 616 cd9660_statfs(mp, sbp, p) 617 struct mount *mp; 618 struct statfs *sbp; 619 struct proc *p; 620 { 621 struct iso_mnt *isomp; 622 623 isomp = VFSTOISOFS(mp); 624 625 #ifdef COMPAT_09 626 sbp->f_type = 5; 627 #else 628 sbp->f_type = 0; 629 #endif 630 sbp->f_bsize = isomp->logical_block_size; 631 sbp->f_iosize = sbp->f_bsize; /* XXX */ 632 sbp->f_blocks = isomp->volume_space_size; 633 sbp->f_bfree = 0; /* total free blocks */ 634 sbp->f_bavail = 0; /* blocks free for non superuser */ 635 sbp->f_files = 0; /* total files */ 636 sbp->f_ffree = 0; /* free file nodes */ 637 copy_statfs_info(sbp, mp); 638 /* Use the first spare for flags: */ 639 sbp->f_spare[0] = isomp->im_flags; 640 return 0; 641 } 642 643 /* ARGSUSED */ 644 int 645 cd9660_sync(mp, waitfor, cred, p) 646 struct mount *mp; 647 int waitfor; 648 struct ucred *cred; 649 struct proc *p; 650 { 651 return (0); 652 } 653 654 /* 655 * File handle to vnode 656 * 657 * Have to be really careful about stale file handles: 658 * - check that the inode number is in range 659 * - call iget() to get the locked inode 660 * - check for an unallocated inode (i_mode == 0) 661 * - check that the generation number matches 662 */ 663 664 struct ifid { 665 ushort ifid_len; 666 ushort ifid_pad; 667 int ifid_ino; 668 long ifid_start; 669 }; 670 671 /* ARGSUSED */ 672 int 673 cd9660_fhtovp(mp, fhp, vpp) 674 struct mount *mp; 675 struct fid *fhp; 676 struct vnode **vpp; 677 { 678 struct ifid *ifhp = (struct ifid *)fhp; 679 struct iso_node *ip; 680 struct vnode *nvp; 681 int error; 682 683 #ifdef ISOFS_DBG 684 printf("fhtovp: ino %d, start %ld\n", 685 ifhp->ifid_ino, ifhp->ifid_start); 686 #endif 687 688 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 689 *vpp = NULLVP; 690 return (error); 691 } 692 ip = VTOI(nvp); 693 if (ip->inode.iso_mode == 0) { 694 vput(nvp); 695 *vpp = NULLVP; 696 return (ESTALE); 697 } 698 *vpp = nvp; 699 return (0); 700 } 701 702 /* ARGSUSED */ 703 int 704 cd9660_check_export(mp, nam, exflagsp, credanonp) 705 struct mount *mp; 706 struct mbuf *nam; 707 int *exflagsp; 708 struct ucred **credanonp; 709 { 710 struct netcred *np; 711 struct iso_mnt *imp = VFSTOISOFS(mp); 712 713 #ifdef ISOFS_DBG 714 printf("check_export: ino %d, start %ld\n", 715 ifhp->ifid_ino, ifhp->ifid_start); 716 #endif 717 718 /* 719 * Get the export permission structure for this <mp, client> tuple. 720 */ 721 np = vfs_export_lookup(mp, &imp->im_export, nam); 722 if (np == NULL) 723 return (EACCES); 724 725 *exflagsp = np->netc_exflags; 726 *credanonp = &np->netc_anon; 727 return (0); 728 } 729 730 int 731 cd9660_vget(mp, ino, vpp) 732 struct mount *mp; 733 ino_t ino; 734 struct vnode **vpp; 735 { 736 737 /* 738 * XXXX 739 * It would be nice if we didn't always set the `relocated' flag 740 * and force the extra read, but I don't want to think about fixing 741 * that right now. 742 */ 743 return (cd9660_vget_internal(mp, ino, vpp, 744 #if 0 745 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 746 #else 747 0, 748 #endif 749 NULL)); 750 } 751 752 int 753 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 754 struct mount *mp; 755 ino_t ino; 756 struct vnode **vpp; 757 int relocated; 758 struct iso_directory_record *isodir; 759 { 760 struct iso_mnt *imp; 761 struct iso_node *ip; 762 #ifdef ISODEVMAP 763 struct iso_dnode *dp; 764 #endif 765 struct buf *bp; 766 struct vnode *vp, *nvp; 767 dev_t dev; 768 int error; 769 770 imp = VFSTOISOFS(mp); 771 dev = imp->im_dev; 772 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 773 return (0); 774 775 /* Allocate a new vnode/iso_node. */ 776 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 777 *vpp = NULLVP; 778 return (error); 779 } 780 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 781 memset(ip, 0, sizeof(struct iso_node)); 782 vp->v_data = ip; 783 ip->i_vnode = vp; 784 ip->i_dev = dev; 785 ip->i_number = ino; 786 787 /* 788 * Put it onto its hash chain and lock it so that other requests for 789 * this inode will block if they arrive while we are sleeping waiting 790 * for old data structures to be purged or for the contents of the 791 * disk portion of this inode to be read. 792 */ 793 cd9660_ihashins(ip); 794 795 if (isodir == 0) { 796 int lbn, off; 797 798 lbn = lblkno(imp, ino); 799 if (lbn >= imp->volume_space_size) { 800 vput(vp); 801 printf("fhtovp: lbn exceed volume space %d\n", lbn); 802 return (ESTALE); 803 } 804 805 off = blkoff(imp, ino); 806 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 807 vput(vp); 808 printf("fhtovp: crosses block boundary %d\n", 809 off + ISO_DIRECTORY_RECORD_SIZE); 810 return (ESTALE); 811 } 812 813 error = bread(imp->im_devvp, 814 lbn << (imp->im_bshift - DEV_BSHIFT), 815 imp->logical_block_size, NOCRED, &bp); 816 if (error) { 817 vput(vp); 818 brelse(bp); 819 printf("fhtovp: bread error %d\n",error); 820 return (error); 821 } 822 isodir = (struct iso_directory_record *)(bp->b_data + off); 823 824 if (off + isonum_711(isodir->length) > 825 imp->logical_block_size) { 826 vput(vp); 827 if (bp != 0) 828 brelse(bp); 829 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 830 off +isonum_711(isodir->length), off, 831 isonum_711(isodir->length)); 832 return (ESTALE); 833 } 834 835 #if 0 836 if (isonum_733(isodir->extent) + 837 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 838 if (bp != 0) 839 brelse(bp); 840 printf("fhtovp: file start miss %d vs %d\n", 841 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 842 ifhp->ifid_start); 843 return (ESTALE); 844 } 845 #endif 846 } else 847 bp = 0; 848 849 ip->i_mnt = imp; 850 ip->i_devvp = imp->im_devvp; 851 VREF(ip->i_devvp); 852 853 if (relocated) { 854 /* 855 * On relocated directories we must 856 * read the `.' entry out of a dir. 857 */ 858 ip->iso_start = ino >> imp->im_bshift; 859 if (bp != 0) 860 brelse(bp); 861 if ((error = VOP_BLKATOFF(vp, (off_t)0, NULL, &bp)) != 0) { 862 vput(vp); 863 return (error); 864 } 865 isodir = (struct iso_directory_record *)bp->b_data; 866 } 867 868 ip->iso_extent = isonum_733(isodir->extent); 869 ip->i_size = isonum_733(isodir->size); 870 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 871 872 /* 873 * Setup time stamp, attribute 874 */ 875 vp->v_type = VNON; 876 switch (imp->iso_ftype) { 877 default: /* ISO_FTYPE_9660 */ 878 { 879 struct buf *bp2; 880 int off; 881 if ((imp->im_flags & ISOFSMNT_EXTATT) 882 && (off = isonum_711(isodir->ext_attr_length))) 883 VOP_BLKATOFF(vp, (off_t)-(off << imp->im_bshift), NULL, 884 &bp2); 885 else 886 bp2 = NULL; 887 cd9660_defattr(isodir, ip, bp2); 888 cd9660_deftstamp(isodir, ip, bp2); 889 if (bp2) 890 brelse(bp2); 891 break; 892 } 893 case ISO_FTYPE_RRIP: 894 cd9660_rrip_analyze(isodir, ip, imp); 895 break; 896 } 897 898 if (bp != 0) 899 brelse(bp); 900 901 /* 902 * Initialize the associated vnode 903 */ 904 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 905 case VFIFO: 906 vp->v_op = cd9660_fifoop_p; 907 break; 908 case VCHR: 909 case VBLK: 910 /* 911 * if device, look at device number table for translation 912 */ 913 #ifdef ISODEVMAP 914 if ((dp = iso_dmap(dev, ino, 0)) != NULL) 915 ip->inode.iso_rdev = dp->d_dev; 916 #endif 917 vp->v_op = cd9660_specop_p; 918 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 919 /* 920 * Discard unneeded vnode, but save its iso_node. 921 * Note that the lock is carried over in the iso_node 922 * to the replacement vnode. 923 */ 924 nvp->v_data = vp->v_data; 925 vp->v_data = NULL; 926 VOP_UNLOCK(vp, 0); 927 vp->v_op = spec_vnodeop_p; 928 vrele(vp); 929 vgone(vp); 930 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 931 /* 932 * Reinitialize aliased inode. 933 */ 934 vp = nvp; 935 ip->i_vnode = vp; 936 } 937 break; 938 case VLNK: 939 case VNON: 940 case VSOCK: 941 case VDIR: 942 case VBAD: 943 break; 944 case VREG: 945 uvm_vnp_setsize(vp, ip->i_size); 946 break; 947 } 948 949 if (ip->iso_extent == imp->root_extent) 950 vp->v_flag |= VROOT; 951 952 /* 953 * XXX need generation number? 954 */ 955 956 genfs_node_init(vp, &cd9660_genfsops); 957 *vpp = vp; 958 return (0); 959 } 960 961 /* 962 * Vnode pointer to File handle 963 */ 964 /* ARGSUSED */ 965 int 966 cd9660_vptofh(vp, fhp) 967 struct vnode *vp; 968 struct fid *fhp; 969 { 970 struct iso_node *ip = VTOI(vp); 971 struct ifid *ifhp; 972 973 ifhp = (struct ifid *)fhp; 974 ifhp->ifid_len = sizeof(struct ifid); 975 976 ifhp->ifid_ino = ip->i_number; 977 ifhp->ifid_start = ip->iso_start; 978 979 #ifdef ISOFS_DBG 980 printf("vptofh: ino %d, start %ld\n", 981 ifhp->ifid_ino,ifhp->ifid_start); 982 #endif 983 return 0; 984 } 985 986 int 987 cd9660_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 988 int *name; 989 u_int namelen; 990 void *oldp; 991 size_t *oldlenp; 992 void *newp; 993 size_t newlen; 994 struct proc *p; 995 { 996 return (EOPNOTSUPP); 997 } 998
Indexes created Fri Sep 26 08:10:20 GMT 2025