cd9660_vfsops.c revision 1.2
1 /* $NetBSD: cd9660_vfsops.c,v 1.2 2003/02/01 06:23:41 thorpej 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 1.2 2003/02/01 06:23:41 thorpej 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, (caddr_t)&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, (caddr_t)&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, (caddr_t)&sess, 0, 361 FSCRED, p); 362 if (error) 363 sess = 0; /* never mind */ 364 } 365 #ifdef DEBUG 366 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 367 #endif 368 369 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 370 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 371 iso_bsize, NOCRED, &bp)) != 0) 372 goto out; 373 374 vdp = (struct iso_volume_descriptor *)bp->b_data; 375 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 376 error = EINVAL; 377 goto out; 378 } 379 380 switch (isonum_711(vdp->type)) { 381 case ISO_VD_PRIMARY: 382 if (pribp == NULL) { 383 pribp = bp; 384 bp = NULL; 385 } 386 break; 387 388 case ISO_VD_SUPPLEMENTARY: 389 if (supbp == NULL) { 390 supbp = bp; 391 bp = NULL; 392 } 393 break; 394 395 default: 396 break; 397 } 398 399 if (isonum_711 (vdp->type) == ISO_VD_END) { 400 brelse(bp); 401 bp = NULL; 402 break; 403 } 404 405 if (bp != NULL) { 406 brelse(bp); 407 bp = NULL; 408 } 409 } 410 411 if (pribp == NULL) { 412 error = EINVAL; 413 goto out; 414 } 415 416 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 417 memset((caddr_t)isomp, 0, sizeof *isomp); 418 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 419 error = EINVAL; 420 goto out; 421 } 422 423 isomp->volume_space_size += sess; 424 425 pribp->b_flags |= B_AGE; 426 brelse(pribp); 427 pribp = NULL; 428 429 mp->mnt_data = isomp; 430 mp->mnt_stat.f_fsid.val[0] = (long)dev; 431 mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_CD9660); 432 mp->mnt_maxsymlinklen = 0; 433 mp->mnt_flag |= MNT_LOCAL; 434 mp->mnt_dev_bshift = iso_bsize; 435 mp->mnt_fs_bshift = isomp->im_bshift; 436 isomp->im_mountp = mp; 437 isomp->im_dev = dev; 438 isomp->im_devvp = devvp; 439 440 devvp->v_specmountpoint = mp; 441 442 /* Check the Rock Ridge Extension support */ 443 if (!(argp->flags & ISOFSMNT_NORRIP)) { 444 struct iso_directory_record *rootp; 445 446 if ((error = bread(isomp->im_devvp, 447 (isomp->root_extent + ext_attr_length) << 448 (isomp->im_bshift - DEV_BSHIFT), 449 isomp->logical_block_size, NOCRED, 450 &bp)) != 0) 451 goto out; 452 453 rootp = (struct iso_directory_record *)bp->b_data; 454 455 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 456 argp->flags |= ISOFSMNT_NORRIP; 457 } else { 458 argp->flags &= ~ISOFSMNT_GENS; 459 } 460 461 /* 462 * The contents are valid, 463 * but they will get reread as part of another vnode, so... 464 */ 465 bp->b_flags |= B_AGE; 466 brelse(bp); 467 bp = NULL; 468 } 469 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 470 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 471 472 if (isomp->im_flags & ISOFSMNT_GENS) 473 isomp->iso_ftype = ISO_FTYPE_9660; 474 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 475 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 476 if (argp->flags & ISOFSMNT_NOCASETRANS) 477 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 478 } else 479 isomp->iso_ftype = ISO_FTYPE_RRIP; 480 481 /* Check the Joliet Extension support */ 482 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 483 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 484 supbp != NULL) { 485 joliet_level = 0; 486 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 487 488 if ((isonum_711(sup->flags) & 1) == 0) { 489 if (memcmp(sup->escape, "%/@", 3) == 0) 490 joliet_level = 1; 491 if (memcmp(sup->escape, "%/C", 3) == 0) 492 joliet_level = 2; 493 if (memcmp(sup->escape, "%/E", 3) == 0) 494 joliet_level = 3; 495 } 496 if (joliet_level != 0) { 497 if (iso_makemp(isomp, supbp, NULL) == -1) { 498 error = EINVAL; 499 goto out; 500 } 501 isomp->im_joliet_level = joliet_level; 502 } 503 } 504 505 if (supbp != NULL) { 506 brelse(supbp); 507 supbp = NULL; 508 } 509 510 return 0; 511 out: 512 if (bp) 513 brelse(bp); 514 if (pribp) 515 brelse(pribp); 516 if (supbp) 517 brelse(supbp); 518 if (needclose) { 519 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 520 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 521 VOP_UNLOCK(devvp, 0); 522 } 523 if (isomp) { 524 free((caddr_t)isomp, M_ISOFSMNT); 525 mp->mnt_data = NULL; 526 } 527 return error; 528 } 529 530 /* 531 * Make a filesystem operational. 532 * Nothing to do at the moment. 533 */ 534 /* ARGSUSED */ 535 int 536 cd9660_start(mp, flags, p) 537 struct mount *mp; 538 int flags; 539 struct proc *p; 540 { 541 return 0; 542 } 543 544 /* 545 * unmount system call 546 */ 547 int 548 cd9660_unmount(mp, mntflags, p) 549 struct mount *mp; 550 int mntflags; 551 struct proc *p; 552 { 553 struct iso_mnt *isomp; 554 int error, flags = 0; 555 556 if (mntflags & MNT_FORCE) 557 flags |= FORCECLOSE; 558 #if 0 559 mntflushbuf(mp, 0); 560 if (mntinvalbuf(mp)) 561 return EBUSY; 562 #endif 563 if ((error = vflush(mp, NULLVP, flags)) != 0) 564 return (error); 565 566 isomp = VFSTOISOFS(mp); 567 568 #ifdef ISODEVMAP 569 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 570 iso_dunmap(isomp->im_dev); 571 #endif 572 573 if (isomp->im_devvp->v_type != VBAD) 574 isomp->im_devvp->v_specmountpoint = NULL; 575 576 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 577 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 578 vput(isomp->im_devvp); 579 free((caddr_t)isomp, M_ISOFSMNT); 580 mp->mnt_data = NULL; 581 mp->mnt_flag &= ~MNT_LOCAL; 582 return (error); 583 } 584 585 /* 586 * Return root of a filesystem 587 */ 588 int 589 cd9660_root(mp, vpp) 590 struct mount *mp; 591 struct vnode **vpp; 592 { 593 struct iso_mnt *imp = VFSTOISOFS(mp); 594 struct iso_directory_record *dp = 595 (struct iso_directory_record *)imp->root; 596 ino_t ino = isodirino(dp, imp); 597 598 /* 599 * With RRIP we must use the `.' entry of the root directory. 600 * Simply tell vget, that it's a relocated directory. 601 */ 602 return (cd9660_vget_internal(mp, ino, vpp, 603 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 604 } 605 606 /* 607 * Do operations associated with quotas, not supported 608 */ 609 /* ARGSUSED */ 610 int 611 cd9660_quotactl(mp, cmd, uid, arg, p) 612 struct mount *mp; 613 int cmd; 614 uid_t uid; 615 caddr_t arg; 616 struct proc *p; 617 { 618 619 return (EOPNOTSUPP); 620 } 621 622 /* 623 * Get file system statistics. 624 */ 625 int 626 cd9660_statfs(mp, sbp, p) 627 struct mount *mp; 628 struct statfs *sbp; 629 struct proc *p; 630 { 631 struct iso_mnt *isomp; 632 633 isomp = VFSTOISOFS(mp); 634 635 #ifdef COMPAT_09 636 sbp->f_type = 5; 637 #else 638 sbp->f_type = 0; 639 #endif 640 sbp->f_bsize = isomp->logical_block_size; 641 sbp->f_iosize = sbp->f_bsize; /* XXX */ 642 sbp->f_blocks = isomp->volume_space_size; 643 sbp->f_bfree = 0; /* total free blocks */ 644 sbp->f_bavail = 0; /* blocks free for non superuser */ 645 sbp->f_files = 0; /* total files */ 646 sbp->f_ffree = 0; /* free file nodes */ 647 if (sbp != &mp->mnt_stat) { 648 memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN); 649 memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN); 650 } 651 strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN); 652 /* Use the first spare for flags: */ 653 sbp->f_spare[0] = isomp->im_flags; 654 return 0; 655 } 656 657 /* ARGSUSED */ 658 int 659 cd9660_sync(mp, waitfor, cred, p) 660 struct mount *mp; 661 int waitfor; 662 struct ucred *cred; 663 struct proc *p; 664 { 665 return (0); 666 } 667 668 /* 669 * File handle to vnode 670 * 671 * Have to be really careful about stale file handles: 672 * - check that the inode number is in range 673 * - call iget() to get the locked inode 674 * - check for an unallocated inode (i_mode == 0) 675 * - check that the generation number matches 676 */ 677 678 struct ifid { 679 ushort ifid_len; 680 ushort ifid_pad; 681 int ifid_ino; 682 long ifid_start; 683 }; 684 685 /* ARGSUSED */ 686 int 687 cd9660_fhtovp(mp, fhp, vpp) 688 struct mount *mp; 689 struct fid *fhp; 690 struct vnode **vpp; 691 { 692 struct ifid *ifhp = (struct ifid *)fhp; 693 struct iso_node *ip; 694 struct vnode *nvp; 695 int error; 696 697 #ifdef ISOFS_DBG 698 printf("fhtovp: ino %d, start %ld\n", 699 ifhp->ifid_ino, ifhp->ifid_start); 700 #endif 701 702 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 703 *vpp = NULLVP; 704 return (error); 705 } 706 ip = VTOI(nvp); 707 if (ip->inode.iso_mode == 0) { 708 vput(nvp); 709 *vpp = NULLVP; 710 return (ESTALE); 711 } 712 *vpp = nvp; 713 return (0); 714 } 715 716 /* ARGSUSED */ 717 int 718 cd9660_check_export(mp, nam, exflagsp, credanonp) 719 struct mount *mp; 720 struct mbuf *nam; 721 int *exflagsp; 722 struct ucred **credanonp; 723 { 724 struct netcred *np; 725 struct iso_mnt *imp = VFSTOISOFS(mp); 726 727 #ifdef ISOFS_DBG 728 printf("check_export: ino %d, start %ld\n", 729 ifhp->ifid_ino, ifhp->ifid_start); 730 #endif 731 732 /* 733 * Get the export permission structure for this <mp, client> tuple. 734 */ 735 np = vfs_export_lookup(mp, &imp->im_export, nam); 736 if (np == NULL) 737 return (EACCES); 738 739 *exflagsp = np->netc_exflags; 740 *credanonp = &np->netc_anon; 741 return (0); 742 } 743 744 int 745 cd9660_vget(mp, ino, vpp) 746 struct mount *mp; 747 ino_t ino; 748 struct vnode **vpp; 749 { 750 751 /* 752 * XXXX 753 * It would be nice if we didn't always set the `relocated' flag 754 * and force the extra read, but I don't want to think about fixing 755 * that right now. 756 */ 757 return (cd9660_vget_internal(mp, ino, vpp, 758 #if 0 759 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 760 #else 761 0, 762 #endif 763 NULL)); 764 } 765 766 int 767 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 768 struct mount *mp; 769 ino_t ino; 770 struct vnode **vpp; 771 int relocated; 772 struct iso_directory_record *isodir; 773 { 774 struct iso_mnt *imp; 775 struct iso_node *ip; 776 #ifdef ISODEVMAP 777 struct iso_dnode *dp; 778 #endif 779 struct buf *bp; 780 struct vnode *vp, *nvp; 781 dev_t dev; 782 int error; 783 784 imp = VFSTOISOFS(mp); 785 dev = imp->im_dev; 786 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 787 return (0); 788 789 /* Allocate a new vnode/iso_node. */ 790 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 791 *vpp = NULLVP; 792 return (error); 793 } 794 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 795 memset((caddr_t)ip, 0, sizeof(struct iso_node)); 796 vp->v_data = ip; 797 ip->i_vnode = vp; 798 ip->i_dev = dev; 799 ip->i_number = ino; 800 801 /* 802 * Put it onto its hash chain and lock it so that other requests for 803 * this inode will block if they arrive while we are sleeping waiting 804 * for old data structures to be purged or for the contents of the 805 * disk portion of this inode to be read. 806 */ 807 cd9660_ihashins(ip); 808 809 if (isodir == 0) { 810 int lbn, off; 811 812 lbn = lblkno(imp, ino); 813 if (lbn >= imp->volume_space_size) { 814 vput(vp); 815 printf("fhtovp: lbn exceed volume space %d\n", lbn); 816 return (ESTALE); 817 } 818 819 off = blkoff(imp, ino); 820 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 821 vput(vp); 822 printf("fhtovp: crosses block boundary %d\n", 823 off + ISO_DIRECTORY_RECORD_SIZE); 824 return (ESTALE); 825 } 826 827 error = bread(imp->im_devvp, 828 lbn << (imp->im_bshift - DEV_BSHIFT), 829 imp->logical_block_size, NOCRED, &bp); 830 if (error) { 831 vput(vp); 832 brelse(bp); 833 printf("fhtovp: bread error %d\n",error); 834 return (error); 835 } 836 isodir = (struct iso_directory_record *)(bp->b_data + off); 837 838 if (off + isonum_711(isodir->length) > 839 imp->logical_block_size) { 840 vput(vp); 841 if (bp != 0) 842 brelse(bp); 843 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 844 off +isonum_711(isodir->length), off, 845 isonum_711(isodir->length)); 846 return (ESTALE); 847 } 848 849 #if 0 850 if (isonum_733(isodir->extent) + 851 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 852 if (bp != 0) 853 brelse(bp); 854 printf("fhtovp: file start miss %d vs %d\n", 855 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 856 ifhp->ifid_start); 857 return (ESTALE); 858 } 859 #endif 860 } else 861 bp = 0; 862 863 ip->i_mnt = imp; 864 ip->i_devvp = imp->im_devvp; 865 VREF(ip->i_devvp); 866 867 if (relocated) { 868 /* 869 * On relocated directories we must 870 * read the `.' entry out of a dir. 871 */ 872 ip->iso_start = ino >> imp->im_bshift; 873 if (bp != 0) 874 brelse(bp); 875 if ((error = VOP_BLKATOFF(vp, (off_t)0, NULL, &bp)) != 0) { 876 vput(vp); 877 return (error); 878 } 879 isodir = (struct iso_directory_record *)bp->b_data; 880 } 881 882 ip->iso_extent = isonum_733(isodir->extent); 883 ip->i_size = isonum_733(isodir->size); 884 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 885 886 /* 887 * Setup time stamp, attribute 888 */ 889 vp->v_type = VNON; 890 switch (imp->iso_ftype) { 891 default: /* ISO_FTYPE_9660 */ 892 { 893 struct buf *bp2; 894 int off; 895 if ((imp->im_flags & ISOFSMNT_EXTATT) 896 && (off = isonum_711(isodir->ext_attr_length))) 897 VOP_BLKATOFF(vp, (off_t)-(off << imp->im_bshift), NULL, 898 &bp2); 899 else 900 bp2 = NULL; 901 cd9660_defattr(isodir, ip, bp2); 902 cd9660_deftstamp(isodir, ip, bp2); 903 if (bp2) 904 brelse(bp2); 905 break; 906 } 907 case ISO_FTYPE_RRIP: 908 cd9660_rrip_analyze(isodir, ip, imp); 909 break; 910 } 911 912 if (bp != 0) 913 brelse(bp); 914 915 /* 916 * Initialize the associated vnode 917 */ 918 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 919 case VFIFO: 920 vp->v_op = cd9660_fifoop_p; 921 break; 922 case VCHR: 923 case VBLK: 924 /* 925 * if device, look at device number table for translation 926 */ 927 #ifdef ISODEVMAP 928 if ((dp = iso_dmap(dev, ino, 0)) != NULL) 929 ip->inode.iso_rdev = dp->d_dev; 930 #endif 931 vp->v_op = cd9660_specop_p; 932 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 933 /* 934 * Discard unneeded vnode, but save its iso_node. 935 * Note that the lock is carried over in the iso_node 936 * to the replacement vnode. 937 */ 938 nvp->v_data = vp->v_data; 939 vp->v_data = NULL; 940 VOP_UNLOCK(vp, 0); 941 vp->v_op = spec_vnodeop_p; 942 vrele(vp); 943 vgone(vp); 944 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 945 /* 946 * Reinitialize aliased inode. 947 */ 948 vp = nvp; 949 ip->i_vnode = vp; 950 } 951 break; 952 case VLNK: 953 case VNON: 954 case VSOCK: 955 case VDIR: 956 case VBAD: 957 break; 958 case VREG: 959 uvm_vnp_setsize(vp, ip->i_size); 960 break; 961 } 962 963 if (ip->iso_extent == imp->root_extent) 964 vp->v_flag |= VROOT; 965 966 /* 967 * XXX need generation number? 968 */ 969 970 genfs_node_init(vp, &cd9660_genfsops); 971 *vpp = vp; 972 return (0); 973 } 974 975 /* 976 * Vnode pointer to File handle 977 */ 978 /* ARGSUSED */ 979 int 980 cd9660_vptofh(vp, fhp) 981 struct vnode *vp; 982 struct fid *fhp; 983 { 984 struct iso_node *ip = VTOI(vp); 985 struct ifid *ifhp; 986 987 ifhp = (struct ifid *)fhp; 988 ifhp->ifid_len = sizeof(struct ifid); 989 990 ifhp->ifid_ino = ip->i_number; 991 ifhp->ifid_start = ip->iso_start; 992 993 #ifdef ISOFS_DBG 994 printf("vptofh: ino %d, start %ld\n", 995 ifhp->ifid_ino,ifhp->ifid_start); 996 #endif 997 return 0; 998 } 999 1000 int 1001 cd9660_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 1002 int *name; 1003 u_int namelen; 1004 void *oldp; 1005 size_t *oldlenp; 1006 void *newp; 1007 size_t newlen; 1008 struct proc *p; 1009 { 1010 return (EOPNOTSUPP); 1011 } 1012
Indexes created Tue Sep 23 01:09:51 GMT 2025