1 /* $OpenBSD: cd9660_vfsops.c,v 1.83 2016/09/07 17:30:12 natano Exp $ */ 2 /* $NetBSD: cd9660_vfsops.c,v 1.26 1997/06/13 15:38:58 pk Exp $ */ 3 4 /*- 5 * Copyright (c) 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley 9 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 10 * Support code is derived from software contributed to Berkeley 11 * by Atsushi Murai (amurai@spec.co.jp). 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)cd9660_vfsops.c 8.9 (Berkeley) 12/5/94 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/proc.h> 44 #include <sys/kernel.h> 45 #include <sys/vnode.h> 46 #include <sys/lock.h> 47 #include <sys/specdev.h> 48 #include <sys/mount.h> 49 #include <sys/buf.h> 50 #include <sys/file.h> 51 #include <sys/disklabel.h> 52 #include <sys/ioctl.h> 53 #include <sys/cdio.h> 54 #include <sys/errno.h> 55 #include <sys/malloc.h> 56 #include <sys/stat.h> 57 58 #include <isofs/cd9660/iso.h> 59 #include <isofs/cd9660/cd9660_extern.h> 60 #include <isofs/cd9660/iso_rrip.h> 61 #include <isofs/cd9660/cd9660_node.h> 62 63 const struct vfsops cd9660_vfsops = { 64 cd9660_mount, 65 cd9660_start, 66 cd9660_unmount, 67 cd9660_root, 68 cd9660_quotactl, 69 cd9660_statfs, 70 cd9660_sync, 71 cd9660_vget, 72 cd9660_fhtovp, 73 cd9660_vptofh, 74 cd9660_init, 75 cd9660_sysctl, 76 cd9660_check_export 77 }; 78 79 /* 80 * Called by vfs_mountroot when iso is going to be mounted as root. 81 */ 82 83 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 84 struct proc *p, struct iso_args *argp); 85 int iso_disklabelspoof(dev_t dev, void (*strat)(struct buf *), 86 struct disklabel *lp); 87 88 int 89 cd9660_mountroot(void) 90 { 91 struct mount *mp; 92 extern struct vnode *rootvp; 93 struct proc *p = curproc; /* XXX */ 94 int error; 95 struct iso_args args; 96 97 /* 98 * Get vnodes for swapdev and rootdev. 99 */ 100 if ((error = bdevvp(swapdev, &swapdev_vp)) || 101 (error = bdevvp(rootdev, &rootvp))) { 102 printf("cd9660_mountroot: can't setup bdevvp's"); 103 return (error); 104 } 105 106 if ((error = vfs_rootmountalloc("cd9660", "root_device", &mp)) != 0) 107 return (error); 108 args.flags = ISOFSMNT_ROOT; 109 if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) { 110 mp->mnt_vfc->vfc_refcount--; 111 vfs_unbusy(mp); 112 free(mp, M_MOUNT, 0); 113 return (error); 114 } 115 116 TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list); 117 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 118 vfs_unbusy(mp); 119 inittodr(0); 120 121 return (0); 122 } 123 124 /* 125 * VFS Operations. 126 * 127 * mount system call 128 */ 129 int 130 cd9660_mount(mp, path, data, ndp, p) 131 register struct mount *mp; 132 const char *path; 133 void *data; 134 struct nameidata *ndp; 135 struct proc *p; 136 { 137 struct iso_mnt *imp = NULL; 138 struct iso_args args; 139 struct vnode *devvp; 140 char fspec[MNAMELEN]; 141 int error; 142 143 if ((mp->mnt_flag & MNT_RDONLY) == 0) 144 return (EROFS); 145 146 error = copyin(data, &args, sizeof(struct iso_args)); 147 if (error) 148 return (error); 149 150 /* 151 * If updating, check whether changing from read-only to 152 * read/write; if there is no device name, that's all we do. 153 */ 154 if (mp->mnt_flag & MNT_UPDATE) { 155 imp = VFSTOISOFS(mp); 156 if (args.fspec == NULL) 157 return (vfs_export(mp, &imp->im_export, 158 &args.export_info)); 159 } 160 161 /* 162 * Not an update, or updating the name: look up the name 163 * and verify that it refers to a sensible block device. 164 */ 165 error = copyinstr(args.fspec, fspec, sizeof(fspec), NULL); 166 if (error) 167 return (error); 168 NDINIT(ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, p); 169 if ((error = namei(ndp)) != 0) 170 return (error); 171 devvp = ndp->ni_vp; 172 173 if (devvp->v_type != VBLK) { 174 vrele(devvp); 175 return (ENOTBLK); 176 } 177 if (major(devvp->v_rdev) >= nblkdev) { 178 vrele(devvp); 179 return (ENXIO); 180 } 181 182 if ((mp->mnt_flag & MNT_UPDATE) == 0) 183 error = iso_mountfs(devvp, mp, p, &args); 184 else { 185 if (devvp != imp->im_devvp) 186 error = EINVAL; /* needs translation */ 187 else 188 vrele(devvp); 189 } 190 if (error) { 191 vrele(devvp); 192 return (error); 193 } 194 195 bzero(mp->mnt_stat.f_mntonname, MNAMELEN); 196 strlcpy(mp->mnt_stat.f_mntonname, path, MNAMELEN); 197 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN); 198 strlcpy(mp->mnt_stat.f_mntfromname, fspec, MNAMELEN); 199 bzero(mp->mnt_stat.f_mntfromspec, MNAMELEN); 200 strlcpy(mp->mnt_stat.f_mntfromspec, fspec, MNAMELEN); 201 bcopy(&args, &mp->mnt_stat.mount_info.iso_args, sizeof(args)); 202 203 cd9660_statfs(mp, &mp->mnt_stat, p); 204 205 return (0); 206 } 207 208 /* 209 * Common code for mount and mountroot 210 */ 211 static int 212 iso_mountfs(devvp, mp, p, argp) 213 register struct vnode *devvp; 214 struct mount *mp; 215 struct proc *p; 216 struct iso_args *argp; 217 { 218 register struct iso_mnt *isomp = NULL; 219 struct buf *bp = NULL; 220 struct buf *pribp = NULL, *supbp = NULL; 221 dev_t dev = devvp->v_rdev; 222 int error = EINVAL; 223 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 224 extern struct vnode *rootvp; 225 int iso_bsize; 226 int iso_blknum; 227 int joliet_level; 228 struct iso_volume_descriptor *vdp; 229 struct iso_primary_descriptor *pri = NULL; 230 struct iso_supplementary_descriptor *sup = NULL; 231 struct iso_directory_record *rootp; 232 int logical_block_size; 233 int sess; 234 235 if (!ronly) 236 return (EROFS); 237 238 /* 239 * Disallow multiple mounts of the same device. 240 * Disallow mounting of a device that is currently in use 241 * (except for root, which might share swap device for miniroot). 242 * Flush out any old buffers remaining from a previous use. 243 */ 244 if ((error = vfs_mountedon(devvp)) != 0) 245 return (error); 246 if (vcount(devvp) > 1 && devvp != rootvp) 247 return (EBUSY); 248 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 249 error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0); 250 VOP_UNLOCK(devvp, p); 251 if (error) 252 return (error); 253 254 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 255 if (error) 256 return (error); 257 258 /* 259 * This is the "logical sector size". The standard says this 260 * should be 2048 or the physical sector size on the device, 261 * whichever is greater. For now, we'll just use a constant. 262 */ 263 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 264 265 if (argp->flags & ISOFSMNT_SESS) { 266 sess = argp->sess; 267 if (sess < 0) 268 sess = 0; 269 } else { 270 sess = 0; 271 error = VOP_IOCTL(devvp, CDIOREADMSADDR, (caddr_t)&sess, 0, 272 FSCRED, p); 273 if (error) 274 sess = 0; 275 } 276 277 joliet_level = 0; 278 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 279 if ((error = bread(devvp, 280 (iso_blknum + sess) * btodb(iso_bsize), 281 iso_bsize, &bp)) != 0) 282 goto out; 283 284 vdp = (struct iso_volume_descriptor *)bp->b_data; 285 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 286 error = EINVAL; 287 goto out; 288 } 289 290 switch (isonum_711 (vdp->type)){ 291 case ISO_VD_PRIMARY: 292 if (pribp == NULL) { 293 pribp = bp; 294 bp = NULL; 295 pri = (struct iso_primary_descriptor *)vdp; 296 } 297 break; 298 case ISO_VD_SUPPLEMENTARY: 299 if (supbp == NULL) { 300 supbp = bp; 301 bp = NULL; 302 sup = (struct iso_supplementary_descriptor *)vdp; 303 304 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 305 if (bcmp(sup->escape, "%/@", 3) == 0) 306 joliet_level = 1; 307 if (bcmp(sup->escape, "%/C", 3) == 0) 308 joliet_level = 2; 309 if (bcmp(sup->escape, "%/E", 3) == 0) 310 joliet_level = 3; 311 312 if (isonum_711 (sup->flags) & 1) 313 joliet_level = 0; 314 } 315 } 316 break; 317 318 case ISO_VD_END: 319 goto vd_end; 320 321 default: 322 break; 323 } 324 if (bp) { 325 brelse(bp); 326 bp = NULL; 327 } 328 } 329 vd_end: 330 if (bp) { 331 brelse(bp); 332 bp = NULL; 333 } 334 335 if (pri == NULL) { 336 error = EINVAL; 337 goto out; 338 } 339 340 logical_block_size = isonum_723 (pri->logical_block_size); 341 342 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 343 || (logical_block_size & (logical_block_size - 1)) != 0) { 344 error = EINVAL; 345 goto out; 346 } 347 348 rootp = (struct iso_directory_record *)pri->root_directory_record; 349 350 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 351 bzero((caddr_t)isomp, sizeof *isomp); 352 isomp->logical_block_size = logical_block_size; 353 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 354 bcopy (rootp, isomp->root, sizeof isomp->root); 355 isomp->root_extent = isonum_733 (rootp->extent); 356 isomp->root_size = isonum_733 (rootp->size); 357 isomp->joliet_level = 0; 358 /* 359 * Since an ISO9660 multi-session CD can also access previous sessions, 360 * we have to include them into the space considerations. 361 */ 362 isomp->volume_space_size += sess; 363 isomp->im_bmask = logical_block_size - 1; 364 isomp->im_bshift = ffs(logical_block_size) - 1; 365 366 brelse(pribp); 367 pribp = NULL; 368 369 mp->mnt_data = isomp; 370 mp->mnt_stat.f_fsid.val[0] = (long)dev; 371 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 372 mp->mnt_stat.f_namemax = NAME_MAX; 373 mp->mnt_flag |= MNT_LOCAL; 374 isomp->im_mountp = mp; 375 isomp->im_dev = dev; 376 isomp->im_devvp = devvp; 377 378 /* Check the Rock Ridge Extension support */ 379 if (!(argp->flags & ISOFSMNT_NORRIP)) { 380 if ((error = bread(isomp->im_devvp, (isomp->root_extent + 381 isonum_711(rootp->ext_attr_length)) << 382 (isomp->im_bshift - DEV_BSHIFT), 383 isomp->logical_block_size, &bp)) != 0) 384 goto out; 385 386 rootp = (struct iso_directory_record *)bp->b_data; 387 388 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 389 argp->flags |= ISOFSMNT_NORRIP; 390 } else { 391 argp->flags &= ~ISOFSMNT_GENS; 392 } 393 394 /* 395 * The contents are valid, 396 * but they will get reread as part of another vnode, so... 397 */ 398 brelse(bp); 399 bp = NULL; 400 } 401 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 402 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 403 switch (isomp->im_flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS)) { 404 default: 405 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 406 break; 407 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 408 isomp->iso_ftype = ISO_FTYPE_9660; 409 break; 410 case 0: 411 isomp->iso_ftype = ISO_FTYPE_RRIP; 412 break; 413 } 414 415 /* Decide whether to use the Joliet descriptor */ 416 417 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 418 rootp = (struct iso_directory_record *) 419 sup->root_directory_record; 420 bcopy(rootp, isomp->root, sizeof isomp->root); 421 isomp->root_extent = isonum_733(rootp->extent); 422 isomp->root_size = isonum_733(rootp->size); 423 isomp->joliet_level = joliet_level; 424 } 425 426 if (supbp) { 427 brelse(supbp); 428 supbp = NULL; 429 } 430 431 devvp->v_specmountpoint = mp; 432 433 return (0); 434 out: 435 if (devvp->v_specinfo) 436 devvp->v_specmountpoint = NULL; 437 if (bp) 438 brelse(bp); 439 if (supbp) 440 brelse(supbp); 441 442 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 443 VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 444 VOP_UNLOCK(devvp, p); 445 446 if (isomp) { 447 free((caddr_t)isomp, M_ISOFSMNT, 0); 448 mp->mnt_data = NULL; 449 } 450 return (error); 451 } 452 453 /* 454 * Test to see if the device is an ISOFS filesystem. 455 */ 456 int 457 iso_disklabelspoof(dev, strat, lp) 458 dev_t dev; 459 void (*strat)(struct buf *); 460 register struct disklabel *lp; 461 { 462 struct buf *bp = NULL; 463 struct iso_volume_descriptor *vdp; 464 struct iso_primary_descriptor *pri; 465 int logical_block_size; 466 int error = EINVAL; 467 int iso_blknum; 468 int i; 469 470 bp = geteblk(ISO_DEFAULT_BLOCK_SIZE); 471 bp->b_dev = dev; 472 473 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 474 bp->b_blkno = iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE); 475 bp->b_bcount = ISO_DEFAULT_BLOCK_SIZE; 476 CLR(bp->b_flags, B_READ | B_WRITE | B_DONE); 477 SET(bp->b_flags, B_BUSY | B_READ | B_RAW); 478 479 /*printf("d_secsize %d iso_blknum %d b_blkno %d bcount %d\n", 480 lp->d_secsize, iso_blknum, bp->b_blkno, bp->b_bcount);*/ 481 482 (*strat)(bp); 483 484 if (biowait(bp)) 485 goto out; 486 487 vdp = (struct iso_volume_descriptor *)bp->b_data; 488 /*printf("%2x%2x%2x type %2x\n", vdp->id[0], vdp->id[1], 489 vdp->id[2], isonum_711(vdp->type));*/ 490 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0 || 491 isonum_711 (vdp->type) == ISO_VD_END) 492 goto out; 493 494 if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) 495 break; 496 } 497 498 if (isonum_711 (vdp->type) != ISO_VD_PRIMARY) 499 goto out; 500 501 pri = (struct iso_primary_descriptor *)vdp; 502 logical_block_size = isonum_723 (pri->logical_block_size); 503 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE || 504 (logical_block_size & (logical_block_size - 1)) != 0) 505 goto out; 506 507 /* 508 * build a disklabel for the CD 509 */ 510 strncpy(lp->d_typename, pri->volume_id, sizeof lp->d_typename); 511 strncpy(lp->d_packname, pri->volume_id+16, sizeof lp->d_packname); 512 for (i = 0; i < MAXPARTITIONS; i++) { 513 DL_SETPSIZE(&lp->d_partitions[i], 0); 514 DL_SETPOFFSET(&lp->d_partitions[i], 0); 515 } 516 DL_SETPOFFSET(&lp->d_partitions[0], 0); 517 DL_SETPSIZE(&lp->d_partitions[0], DL_GETDSIZE(lp)); 518 lp->d_partitions[0].p_fstype = FS_ISO9660; 519 DL_SETPOFFSET(&lp->d_partitions[RAW_PART], 0); 520 DL_SETPSIZE(&lp->d_partitions[RAW_PART], DL_GETDSIZE(lp)); 521 lp->d_partitions[RAW_PART].p_fstype = FS_ISO9660; 522 lp->d_npartitions = MAXPARTITIONS; 523 lp->d_bbsize = 8192; /* fake */ 524 lp->d_sbsize = 64*1024; /* fake */ 525 lp->d_version = 1; 526 527 lp->d_magic = DISKMAGIC; 528 lp->d_magic2 = DISKMAGIC; 529 lp->d_checksum = dkcksum(lp); 530 error = 0; 531 out: 532 bp->b_flags |= B_INVAL; 533 brelse(bp); 534 return (error); 535 } 536 537 /* 538 * Make a filesystem operational. 539 * Nothing to do at the moment. 540 */ 541 /* ARGSUSED */ 542 int 543 cd9660_start(mp, flags, p) 544 struct mount *mp; 545 int flags; 546 struct proc *p; 547 { 548 return (0); 549 } 550 551 /* 552 * unmount system call 553 */ 554 int 555 cd9660_unmount(mp, mntflags, p) 556 struct mount *mp; 557 int mntflags; 558 struct proc *p; 559 { 560 register struct iso_mnt *isomp; 561 int error, flags = 0; 562 563 if (mntflags & MNT_FORCE) 564 flags |= FORCECLOSE; 565 #if 0 566 mntflushbuf(mp, 0); 567 if (mntinvalbuf(mp)) 568 return (EBUSY); 569 #endif 570 if ((error = vflush(mp, NULLVP, flags)) != 0) 571 return (error); 572 573 isomp = VFSTOISOFS(mp); 574 575 isomp->im_devvp->v_specmountpoint = NULL; 576 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY, p); 577 (void)VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 578 vput(isomp->im_devvp); 579 free((caddr_t)isomp, M_ISOFSMNT, 0); 580 mp->mnt_data = NULL; 581 mp->mnt_flag &= ~MNT_LOCAL; 582 return (0); 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 cdino_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 register struct statfs *sbp; 629 struct proc *p; 630 { 631 register struct iso_mnt *isomp; 632 633 isomp = VFSTOISOFS(mp); 634 635 sbp->f_bsize = isomp->logical_block_size; 636 sbp->f_iosize = sbp->f_bsize; /* XXX */ 637 sbp->f_blocks = isomp->volume_space_size; 638 sbp->f_bfree = 0; /* total free blocks */ 639 sbp->f_bavail = 0; /* blocks free for non superuser */ 640 sbp->f_files = 0; /* total files */ 641 sbp->f_ffree = 0; /* free file nodes */ 642 sbp->f_favail = 0; /* file nodes free for non superuser */ 643 copy_statfs_info(sbp, mp); 644 645 return (0); 646 } 647 648 /* ARGSUSED */ 649 int 650 cd9660_sync(mp, waitfor, cred, p) 651 struct mount *mp; 652 int waitfor; 653 struct ucred *cred; 654 struct proc *p; 655 { 656 return (0); 657 } 658 659 /* 660 * File handle to vnode 661 * 662 * Have to be really careful about stale file handles: 663 * - check that the inode number is in range 664 * - call iget() to get the locked inode 665 * - check for an unallocated inode (i_mode == 0) 666 * - check that the generation number matches 667 */ 668 669 struct ifid { 670 ushort ifid_len; 671 ushort ifid_pad; 672 int ifid_ino; 673 long ifid_start; 674 }; 675 676 /* ARGSUSED */ 677 int 678 cd9660_fhtovp(mp, fhp, vpp) 679 register struct mount *mp; 680 struct fid *fhp; 681 struct vnode **vpp; 682 { 683 struct ifid *ifhp = (struct ifid *)fhp; 684 register struct iso_node *ip; 685 struct vnode *nvp; 686 int error; 687 688 #ifdef ISOFS_DBG 689 printf("fhtovp: ino %d, start %ld\n", ifhp->ifid_ino, 690 ifhp->ifid_start); 691 #endif 692 693 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 694 *vpp = NULLVP; 695 return (error); 696 } 697 ip = VTOI(nvp); 698 if (ip->inode.iso_mode == 0) { 699 vput(nvp); 700 *vpp = NULLVP; 701 return (ESTALE); 702 } 703 *vpp = nvp; 704 return (0); 705 } 706 707 int 708 cd9660_vget(mp, ino, vpp) 709 struct mount *mp; 710 ino_t ino; 711 struct vnode **vpp; 712 { 713 714 if (ino > (cdino_t)-1) 715 panic("cd9660_vget: alien ino_t %llu", 716 (unsigned long long)ino); 717 718 /* 719 * XXXX 720 * It would be nice if we didn't always set the `relocated' flag 721 * and force the extra read, but I don't want to think about fixing 722 * that right now. 723 */ 724 return (cd9660_vget_internal(mp, ino, vpp, 725 #if 0 726 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 727 #else 728 0, 729 #endif 730 NULL)); 731 } 732 733 int 734 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 735 struct mount *mp; 736 cdino_t ino; 737 struct vnode **vpp; 738 int relocated; 739 struct iso_directory_record *isodir; 740 { 741 register struct iso_mnt *imp; 742 struct iso_node *ip; 743 struct buf *bp; 744 struct vnode *vp, *nvp; 745 dev_t dev; 746 int error; 747 748 retry: 749 imp = VFSTOISOFS(mp); 750 dev = imp->im_dev; 751 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 752 return (0); 753 754 /* Allocate a new vnode/iso_node. */ 755 if ((error = getnewvnode(VT_ISOFS, mp, &cd9660_vops, &vp)) != 0) { 756 *vpp = NULLVP; 757 return (error); 758 } 759 ip = malloc(sizeof(*ip), M_ISOFSNODE, M_WAITOK | M_ZERO); 760 rrw_init(&ip->i_lock, "isoinode"); 761 vp->v_data = ip; 762 ip->i_vnode = vp; 763 ip->i_dev = dev; 764 ip->i_number = ino; 765 766 /* 767 * Put it onto its hash chain and lock it so that other requests for 768 * this inode will block if they arrive while we are sleeping waiting 769 * for old data structures to be purged or for the contents of the 770 * disk portion of this inode to be read. 771 */ 772 error = cd9660_ihashins(ip); 773 774 if (error) { 775 vrele(vp); 776 777 if (error == EEXIST) 778 goto retry; 779 780 return (error); 781 } 782 783 if (isodir == 0) { 784 int lbn, off; 785 786 lbn = lblkno(imp, ino); 787 if (lbn >= imp->volume_space_size) { 788 vput(vp); 789 printf("fhtovp: lbn exceed volume space %d\n", lbn); 790 return (ESTALE); 791 } 792 793 off = blkoff(imp, ino); 794 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) 795 { 796 vput(vp); 797 printf("fhtovp: crosses block boundary %d\n", 798 off + ISO_DIRECTORY_RECORD_SIZE); 799 return (ESTALE); 800 } 801 802 error = bread(imp->im_devvp, 803 lbn << (imp->im_bshift - DEV_BSHIFT), 804 imp->logical_block_size, &bp); 805 if (error) { 806 vput(vp); 807 brelse(bp); 808 printf("fhtovp: bread error %d\n",error); 809 return (error); 810 } 811 isodir = (struct iso_directory_record *)(bp->b_data + off); 812 813 if (off + isonum_711(isodir->length) > 814 imp->logical_block_size) { 815 vput(vp); 816 if (bp != 0) 817 brelse(bp); 818 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 819 off +isonum_711(isodir->length), off, 820 isonum_711(isodir->length)); 821 return (ESTALE); 822 } 823 824 #if 0 825 if (isonum_733(isodir->extent) + 826 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 827 if (bp != 0) 828 brelse(bp); 829 printf("fhtovp: file start miss %d vs %d\n", 830 isonum_733(isodir->extent) + 831 isonum_711(isodir->ext_attr_length), 832 ifhp->ifid_start); 833 return (ESTALE); 834 } 835 #endif 836 } else 837 bp = 0; 838 839 ip->i_mnt = imp; 840 ip->i_devvp = imp->im_devvp; 841 vref(ip->i_devvp); 842 843 if (relocated) { 844 /* 845 * On relocated directories we must 846 * read the `.' entry out of a dir. 847 */ 848 ip->iso_start = ino >> imp->im_bshift; 849 if (bp != 0) 850 brelse(bp); 851 if ((error = cd9660_bufatoff(ip, (off_t)0, NULL, &bp)) != 0) { 852 vput(vp); 853 return (error); 854 } 855 isodir = (struct iso_directory_record *)bp->b_data; 856 } 857 858 ip->iso_extent = isonum_733(isodir->extent); 859 ip->i_size = (u_int32_t) isonum_733(isodir->size); 860 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 861 862 /* 863 * Setup time stamp, attribute 864 */ 865 vp->v_type = VNON; 866 switch (imp->iso_ftype) { 867 default: /* ISO_FTYPE_9660 */ 868 { 869 struct buf *bp2; 870 int off; 871 if ((imp->im_flags & ISOFSMNT_EXTATT) && 872 (off = isonum_711(isodir->ext_attr_length))) 873 cd9660_bufatoff(ip, (off_t)-(off << imp->im_bshift), 874 NULL, &bp2); 875 else 876 bp2 = NULL; 877 cd9660_defattr(isodir, ip, bp2); 878 cd9660_deftstamp(isodir, ip, bp2); 879 if (bp2) 880 brelse(bp2); 881 break; 882 } 883 case ISO_FTYPE_RRIP: 884 cd9660_rrip_analyze(isodir, ip, imp); 885 break; 886 } 887 888 if (bp != 0) 889 brelse(bp); 890 891 /* 892 * Initialize the associated vnode 893 */ 894 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 895 case VFIFO: 896 #ifdef FIFO 897 vp->v_op = &cd9660_fifovops; 898 break; 899 #else 900 vput(vp); 901 return (EOPNOTSUPP); 902 #endif /* FIFO */ 903 case VCHR: 904 case VBLK: 905 /* 906 * if device, look at device number table for translation 907 */ 908 vp->v_op = &cd9660_specvops; 909 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 910 /* 911 * Discard unneeded vnode, but save its iso_node. 912 * Note that the lock is carried over in the iso_node 913 */ 914 nvp->v_data = vp->v_data; 915 vp->v_data = NULL; 916 vp->v_op = &spec_vops; 917 vrele(vp); 918 vgone(vp); 919 /* 920 * Reinitialize aliased inode. 921 */ 922 vp = nvp; 923 ip->i_vnode = vp; 924 } 925 break; 926 case VLNK: 927 case VNON: 928 case VSOCK: 929 case VDIR: 930 case VBAD: 931 break; 932 case VREG: 933 uvm_vnp_setsize(vp, ip->i_size); 934 break; 935 } 936 937 if (ip->iso_extent == imp->root_extent) 938 vp->v_flag |= VROOT; 939 940 /* 941 * XXX need generation number? 942 */ 943 944 *vpp = vp; 945 return (0); 946 } 947 948 /* 949 * Vnode pointer to File handle 950 */ 951 /* ARGSUSED */ 952 int 953 cd9660_vptofh(vp, fhp) 954 struct vnode *vp; 955 struct fid *fhp; 956 { 957 register struct iso_node *ip = VTOI(vp); 958 register struct ifid *ifhp; 959 960 ifhp = (struct ifid *)fhp; 961 ifhp->ifid_len = sizeof(struct ifid); 962 963 ifhp->ifid_ino = ip->i_number; 964 ifhp->ifid_start = ip->iso_start; 965 966 #ifdef ISOFS_DBG 967 printf("vptofh: ino %d, start %ld\n", 968 ifhp->ifid_ino,ifhp->ifid_start); 969 #endif 970 return (0); 971 } 972 973 /* 974 * Verify a remote client has export rights and return these rights via 975 * exflagsp and credanonp. 976 */ 977 int 978 cd9660_check_export(mp, nam, exflagsp, credanonp) 979 register struct mount *mp; 980 struct mbuf *nam; 981 int *exflagsp; 982 struct ucred **credanonp; 983 { 984 register struct netcred *np; 985 register struct iso_mnt *imp = VFSTOISOFS(mp); 986 987 /* 988 * Get the export permission structure for this <mp, client> tuple. 989 */ 990 np = vfs_export_lookup(mp, &imp->im_export, nam); 991 if (np == NULL) 992 return (EACCES); 993 994 *exflagsp = np->netc_exflags; 995 *credanonp = &np->netc_anon; 996 return (0); 997 } 998