1 /* $OpenBSD: cd9660_vfsops.c,v 1.48 2008/07/23 16:24:43 beck 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 <miscfs/specfs/specdev.h> 47 #include <sys/mount.h> 48 #include <sys/buf.h> 49 #include <sys/file.h> 50 #include <sys/disklabel.h> 51 #include <sys/ioctl.h> 52 #include <sys/cdio.h> 53 #include <sys/conf.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() 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); 113 return (error); 114 } 115 116 CIRCLEQ_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 vnode *devvp; 138 struct iso_args args; 139 size_t size; 140 int error; 141 struct iso_mnt *imp = NULL; 142 143 error = copyin(data, &args, sizeof (struct iso_args)); 144 if (error) 145 return (error); 146 147 if ((mp->mnt_flag & MNT_RDONLY) == 0) 148 return (EROFS); 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 == 0) 157 return (vfs_export(mp, &imp->im_export, 158 &args.export_info)); 159 } 160 /* 161 * Not an update, or updating the name: look up the name 162 * and verify that it refers to a sensible block device. 163 */ 164 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 165 if ((error = namei(ndp)) != 0) 166 return (error); 167 devvp = ndp->ni_vp; 168 169 if (devvp->v_type != VBLK) { 170 vrele(devvp); 171 return (ENOTBLK); 172 } 173 if (major(devvp->v_rdev) >= nblkdev) { 174 vrele(devvp); 175 return (ENXIO); 176 } 177 /* 178 * If mount by non-root, then verify that user has necessary 179 * permissions on the device. 180 */ 181 if (p->p_ucred->cr_uid != 0) { 182 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 183 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 184 if (error) { 185 vput(devvp); 186 return (error); 187 } 188 VOP_UNLOCK(devvp, 0, p); 189 } 190 if ((mp->mnt_flag & MNT_UPDATE) == 0) 191 error = iso_mountfs(devvp, mp, p, &args); 192 else { 193 if (devvp != imp->im_devvp) 194 error = EINVAL; /* needs translation */ 195 else 196 vrele(devvp); 197 } 198 if (error) { 199 vrele(devvp); 200 return (error); 201 } 202 imp = VFSTOISOFS(mp); 203 (void)copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 204 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 205 (void)copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 206 &size); 207 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 208 bcopy(&args, &mp->mnt_stat.mount_info.iso_args, sizeof(args)); 209 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 210 return (0); 211 } 212 213 /* 214 * Common code for mount and mountroot 215 */ 216 static int 217 iso_mountfs(devvp, mp, p, argp) 218 register struct vnode *devvp; 219 struct mount *mp; 220 struct proc *p; 221 struct iso_args *argp; 222 { 223 register struct iso_mnt *isomp = (struct iso_mnt *)0; 224 struct buf *bp = NULL; 225 struct buf *pribp = NULL, *supbp = NULL; 226 dev_t dev = devvp->v_rdev; 227 int error = EINVAL; 228 int needclose = 0; 229 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 230 extern struct vnode *rootvp; 231 int iso_bsize; 232 int iso_blknum; 233 int joliet_level; 234 struct iso_volume_descriptor *vdp; 235 struct iso_primary_descriptor *pri = NULL; 236 struct iso_supplementary_descriptor *sup = NULL; 237 struct iso_directory_record *rootp; 238 int logical_block_size; 239 int sess; 240 241 if (!ronly) 242 return (EROFS); 243 244 /* 245 * Disallow multiple mounts of the same device. 246 * Disallow mounting of a device that is currently in use 247 * (except for root, which might share swap device for miniroot). 248 * Flush out any old buffers remaining from a previous use. 249 */ 250 if ((error = vfs_mountedon(devvp)) != 0) 251 return (error); 252 if (vcount(devvp) > 1 && devvp != rootvp) 253 return (EBUSY); 254 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 255 return (error); 256 257 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 258 if (error) 259 return (error); 260 needclose = 1; 261 262 /* 263 * This is the "logical sector size". The standard says this 264 * should be 2048 or the physical sector size on the device, 265 * whichever is greater. For now, we'll just use a constant. 266 */ 267 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 268 269 if (argp->flags & ISOFSMNT_SESS) { 270 sess = argp->sess; 271 if (sess < 0) 272 sess = 0; 273 } else { 274 sess = 0; 275 error = VOP_IOCTL(devvp, CDIOREADMSADDR, (caddr_t)&sess, 0, 276 FSCRED, p); 277 if (error) 278 sess = 0; 279 } 280 281 joliet_level = 0; 282 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 283 if ((error = bread(devvp, 284 (iso_blknum + sess) * btodb(iso_bsize), 285 iso_bsize, NOCRED, &bp)) != 0) 286 goto out; 287 288 vdp = (struct iso_volume_descriptor *)bp->b_data; 289 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 290 error = EINVAL; 291 goto out; 292 } 293 294 switch (isonum_711 (vdp->type)){ 295 case ISO_VD_PRIMARY: 296 if (pribp == NULL) { 297 pribp = bp; 298 bp = NULL; 299 pri = (struct iso_primary_descriptor *)vdp; 300 } 301 break; 302 case ISO_VD_SUPPLEMENTARY: 303 if (supbp == NULL) { 304 supbp = bp; 305 bp = NULL; 306 sup = (struct iso_supplementary_descriptor *)vdp; 307 308 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 309 if (bcmp(sup->escape, "%/@", 3) == 0) 310 joliet_level = 1; 311 if (bcmp(sup->escape, "%/C", 3) == 0) 312 joliet_level = 2; 313 if (bcmp(sup->escape, "%/E", 3) == 0) 314 joliet_level = 3; 315 316 if (isonum_711 (sup->flags) & 1) 317 joliet_level = 0; 318 } 319 } 320 break; 321 322 case ISO_VD_END: 323 goto vd_end; 324 325 default: 326 break; 327 } 328 if (bp) { 329 brelse(bp); 330 bp = NULL; 331 } 332 } 333 vd_end: 334 if (bp) { 335 brelse(bp); 336 bp = NULL; 337 } 338 339 if (pri == NULL) { 340 error = EINVAL; 341 goto out; 342 } 343 344 logical_block_size = isonum_723 (pri->logical_block_size); 345 346 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 347 || (logical_block_size & (logical_block_size - 1)) != 0) { 348 error = EINVAL; 349 goto out; 350 } 351 352 rootp = (struct iso_directory_record *)pri->root_directory_record; 353 354 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 355 bzero((caddr_t)isomp, sizeof *isomp); 356 isomp->logical_block_size = logical_block_size; 357 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 358 bcopy (rootp, isomp->root, sizeof isomp->root); 359 isomp->root_extent = isonum_733 (rootp->extent); 360 isomp->root_size = isonum_733 (rootp->size); 361 isomp->joliet_level = 0; 362 /* 363 * Since an ISO9660 multi-session CD can also access previous sessions, 364 * we have to include them into the space considerations. 365 */ 366 isomp->volume_space_size += sess; 367 isomp->im_bmask = logical_block_size - 1; 368 isomp->im_bshift = ffs(logical_block_size) - 1; 369 370 pribp->b_flags |= B_AGE; 371 brelse(pribp); 372 pribp = NULL; 373 374 mp->mnt_data = (qaddr_t)isomp; 375 mp->mnt_stat.f_fsid.val[0] = (long)dev; 376 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 377 mp->mnt_maxsymlinklen = 0; 378 mp->mnt_flag |= MNT_LOCAL; 379 isomp->im_mountp = mp; 380 isomp->im_dev = dev; 381 isomp->im_devvp = devvp; 382 383 /* Check the Rock Ridge Extension support */ 384 if (!(argp->flags & ISOFSMNT_NORRIP)) { 385 if ((error = bread(isomp->im_devvp, (isomp->root_extent + 386 isonum_711(rootp->ext_attr_length)) << 387 (isomp->im_bshift - DEV_BSHIFT), 388 isomp->logical_block_size, NOCRED, &bp)) != 0) 389 goto out; 390 391 rootp = (struct iso_directory_record *)bp->b_data; 392 393 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 394 argp->flags |= ISOFSMNT_NORRIP; 395 } else { 396 argp->flags &= ~ISOFSMNT_GENS; 397 } 398 399 /* 400 * The contents are valid, 401 * but they will get reread as part of another vnode, so... 402 */ 403 bp->b_flags |= B_AGE; 404 brelse(bp); 405 bp = NULL; 406 } 407 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 408 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 409 switch (isomp->im_flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS)) { 410 default: 411 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 412 break; 413 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 414 isomp->iso_ftype = ISO_FTYPE_9660; 415 break; 416 case 0: 417 isomp->iso_ftype = ISO_FTYPE_RRIP; 418 break; 419 } 420 421 /* Decide whether to use the Joliet descriptor */ 422 423 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 424 rootp = (struct iso_directory_record *) 425 sup->root_directory_record; 426 bcopy(rootp, isomp->root, sizeof isomp->root); 427 isomp->root_extent = isonum_733(rootp->extent); 428 isomp->root_size = isonum_733(rootp->size); 429 isomp->joliet_level = joliet_level; 430 supbp->b_flags |= B_AGE; 431 } 432 433 if (supbp) { 434 brelse(supbp); 435 supbp = NULL; 436 } 437 438 devvp->v_specmountpoint = mp; 439 440 return (0); 441 out: 442 if (bp) 443 brelse(bp); 444 if (supbp) 445 brelse(supbp); 446 if (needclose) 447 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, 448 p); 449 if (isomp) { 450 free((caddr_t)isomp, M_ISOFSMNT); 451 mp->mnt_data = (qaddr_t)0; 452 } 453 return (error); 454 } 455 456 /* 457 * Test to see if the device is an ISOFS filesystem. 458 */ 459 int 460 iso_disklabelspoof(dev, strat, lp) 461 dev_t dev; 462 void (*strat)(struct buf *); 463 register struct disklabel *lp; 464 { 465 struct buf *bp = NULL; 466 struct iso_volume_descriptor *vdp; 467 struct iso_primary_descriptor *pri; 468 int logical_block_size; 469 int error = EINVAL; 470 int iso_blknum; 471 int i; 472 473 bp = geteblk(ISO_DEFAULT_BLOCK_SIZE); 474 bp->b_dev = dev; 475 476 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 477 bp->b_blkno = iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE); 478 bp->b_bcount = ISO_DEFAULT_BLOCK_SIZE; 479 bp->b_flags = B_BUSY | B_READ | B_RAW; 480 bp->b_cylinder = bp->b_blkno / lp->d_secpercyl; 481 482 /*printf("d_secsize %d iso_blknum %d b_blkno %d bcount %d\n", 483 lp->d_secsize, iso_blknum, bp->b_blkno, bp->b_bcount);*/ 484 485 (*strat)(bp); 486 487 if (biowait(bp)) 488 goto out; 489 490 vdp = (struct iso_volume_descriptor *)bp->b_data; 491 /*printf("%2x%2x%2x type %2x\n", vdp->id[0], vdp->id[1], 492 vdp->id[2], isonum_711(vdp->type));*/ 493 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0 || 494 isonum_711 (vdp->type) == ISO_VD_END) 495 goto out; 496 497 if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) 498 break; 499 } 500 501 if (isonum_711 (vdp->type) != ISO_VD_PRIMARY) 502 goto out; 503 504 pri = (struct iso_primary_descriptor *)vdp; 505 logical_block_size = isonum_723 (pri->logical_block_size); 506 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE || 507 (logical_block_size & (logical_block_size - 1)) != 0) 508 goto out; 509 510 /* 511 * build a disklabel for the CD 512 */ 513 strncpy(lp->d_typename, pri->volume_id, sizeof lp->d_typename); 514 strncpy(lp->d_packname, pri->volume_id+16, sizeof lp->d_packname); 515 for (i = 0; i < MAXPARTITIONS; i++) { 516 DL_SETPSIZE(&lp->d_partitions[i], 0); 517 DL_SETPOFFSET(&lp->d_partitions[i], 0); 518 } 519 DL_SETPOFFSET(&lp->d_partitions[0], 0); 520 DL_SETPSIZE(&lp->d_partitions[0], DL_GETDSIZE(lp)); 521 lp->d_partitions[0].p_fstype = FS_ISO9660; 522 DL_SETPOFFSET(&lp->d_partitions[RAW_PART], 0); 523 DL_SETPSIZE(&lp->d_partitions[RAW_PART], DL_GETDSIZE(lp)); 524 lp->d_partitions[RAW_PART].p_fstype = FS_ISO9660; 525 lp->d_npartitions = RAW_PART + 1; 526 lp->d_bbsize = 8192; /* fake */ 527 lp->d_sbsize = 64*1024; /* fake */ 528 lp->d_version = 1; 529 530 lp->d_magic = DISKMAGIC; 531 lp->d_magic2 = DISKMAGIC; 532 lp->d_checksum = dkcksum(lp); 533 error = 0; 534 out: 535 bp->b_flags |= B_INVAL; 536 brelse(bp); 537 return (error); 538 } 539 540 /* 541 * Make a filesystem operational. 542 * Nothing to do at the moment. 543 */ 544 /* ARGSUSED */ 545 int 546 cd9660_start(mp, flags, p) 547 struct mount *mp; 548 int flags; 549 struct proc *p; 550 { 551 return (0); 552 } 553 554 /* 555 * unmount system call 556 */ 557 int 558 cd9660_unmount(mp, mntflags, p) 559 struct mount *mp; 560 int mntflags; 561 struct proc *p; 562 { 563 register struct iso_mnt *isomp; 564 int error, flags = 0; 565 566 if (mntflags & MNT_FORCE) 567 flags |= FORCECLOSE; 568 #if 0 569 mntflushbuf(mp, 0); 570 if (mntinvalbuf(mp)) 571 return (EBUSY); 572 #endif 573 if ((error = vflush(mp, NULLVP, flags)) != 0) 574 return (error); 575 576 isomp = VFSTOISOFS(mp); 577 578 #ifdef ISODEVMAP 579 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 580 iso_dunmap(isomp->im_dev); 581 #endif 582 583 isomp->im_devvp->v_specmountpoint = NULL; 584 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 585 vrele(isomp->im_devvp); 586 free((caddr_t)isomp, M_ISOFSMNT); 587 mp->mnt_data = (qaddr_t)0; 588 mp->mnt_flag &= ~MNT_LOCAL; 589 return (error); 590 } 591 592 /* 593 * Return root of a filesystem 594 */ 595 int 596 cd9660_root(mp, vpp) 597 struct mount *mp; 598 struct vnode **vpp; 599 { 600 struct iso_mnt *imp = VFSTOISOFS(mp); 601 struct iso_directory_record *dp = 602 (struct iso_directory_record *)imp->root; 603 ino_t ino = isodirino(dp, imp); 604 605 /* 606 * With RRIP we must use the `.' entry of the root directory. 607 * Simply tell vget, that it's a relocated directory. 608 */ 609 return (cd9660_vget_internal(mp, ino, vpp, 610 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 611 } 612 613 /* 614 * Do operations associated with quotas, not supported 615 */ 616 /* ARGSUSED */ 617 int 618 cd9660_quotactl(mp, cmd, uid, arg, p) 619 struct mount *mp; 620 int cmd; 621 uid_t uid; 622 caddr_t arg; 623 struct proc *p; 624 { 625 626 return (EOPNOTSUPP); 627 } 628 629 /* 630 * Get file system statistics. 631 */ 632 int 633 cd9660_statfs(mp, sbp, p) 634 struct mount *mp; 635 register struct statfs *sbp; 636 struct proc *p; 637 { 638 register struct iso_mnt *isomp; 639 640 isomp = VFSTOISOFS(mp); 641 642 sbp->f_bsize = isomp->logical_block_size; 643 sbp->f_iosize = sbp->f_bsize; /* XXX */ 644 sbp->f_blocks = isomp->volume_space_size; 645 sbp->f_bfree = 0; /* total free blocks */ 646 sbp->f_bavail = 0; /* blocks free for non superuser */ 647 sbp->f_files = 0; /* total files */ 648 sbp->f_ffree = 0; /* free file nodes */ 649 if (sbp != &mp->mnt_stat) { 650 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 651 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, 652 MNAMELEN); 653 bcopy(&mp->mnt_stat.mount_info.iso_args, 654 &sbp->mount_info.iso_args, sizeof(struct iso_args)); 655 } 656 /* Use the first spare for flags: */ 657 sbp->f_spare[0] = isomp->im_flags; 658 return (0); 659 } 660 661 /* ARGSUSED */ 662 int 663 cd9660_sync(mp, waitfor, cred, p) 664 struct mount *mp; 665 int waitfor; 666 struct ucred *cred; 667 struct proc *p; 668 { 669 return (0); 670 } 671 672 /* 673 * File handle to vnode 674 * 675 * Have to be really careful about stale file handles: 676 * - check that the inode number is in range 677 * - call iget() to get the locked inode 678 * - check for an unallocated inode (i_mode == 0) 679 * - check that the generation number matches 680 */ 681 682 struct ifid { 683 ushort ifid_len; 684 ushort ifid_pad; 685 int ifid_ino; 686 long ifid_start; 687 }; 688 689 /* ARGSUSED */ 690 int 691 cd9660_fhtovp(mp, fhp, vpp) 692 register struct mount *mp; 693 struct fid *fhp; 694 struct vnode **vpp; 695 { 696 struct ifid *ifhp = (struct ifid *)fhp; 697 register struct iso_node *ip; 698 struct vnode *nvp; 699 int error; 700 701 #ifdef ISOFS_DBG 702 printf("fhtovp: ino %d, start %ld\n", ifhp->ifid_ino, 703 ifhp->ifid_start); 704 #endif 705 706 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 707 *vpp = NULLVP; 708 return (error); 709 } 710 ip = VTOI(nvp); 711 if (ip->inode.iso_mode == 0) { 712 vput(nvp); 713 *vpp = NULLVP; 714 return (ESTALE); 715 } 716 *vpp = nvp; 717 return (0); 718 } 719 720 int 721 cd9660_vget(mp, ino, vpp) 722 struct mount *mp; 723 ino_t ino; 724 struct vnode **vpp; 725 { 726 727 /* 728 * XXXX 729 * It would be nice if we didn't always set the `relocated' flag 730 * and force the extra read, but I don't want to think about fixing 731 * that right now. 732 */ 733 return (cd9660_vget_internal(mp, ino, vpp, 734 #if 0 735 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 736 #else 737 0, 738 #endif 739 NULL)); 740 } 741 742 int 743 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 744 struct mount *mp; 745 ino_t ino; 746 struct vnode **vpp; 747 int relocated; 748 struct iso_directory_record *isodir; 749 { 750 register struct iso_mnt *imp; 751 struct iso_node *ip; 752 struct buf *bp; 753 struct vnode *vp, *nvp; 754 dev_t dev; 755 int error; 756 757 retry: 758 imp = VFSTOISOFS(mp); 759 dev = imp->im_dev; 760 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 761 return (0); 762 763 /* Allocate a new vnode/iso_node. */ 764 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 765 *vpp = NULLVP; 766 return (error); 767 } 768 ip = malloc(sizeof(*ip), M_ISOFSNODE, M_WAITOK | M_ZERO); 769 lockinit(&ip->i_lock, PINOD, "isoinode", 0, 0); 770 vp->v_data = ip; 771 ip->i_vnode = vp; 772 ip->i_dev = dev; 773 ip->i_number = ino; 774 775 /* 776 * Put it onto its hash chain and lock it so that other requests for 777 * this inode will block if they arrive while we are sleeping waiting 778 * for old data structures to be purged or for the contents of the 779 * disk portion of this inode to be read. 780 */ 781 error = cd9660_ihashins(ip); 782 783 if (error) { 784 vrele(vp); 785 786 if (error == EEXIST) 787 goto retry; 788 789 return (error); 790 } 791 792 if (isodir == 0) { 793 int lbn, off; 794 795 lbn = lblkno(imp, ino); 796 if (lbn >= imp->volume_space_size) { 797 vput(vp); 798 printf("fhtovp: lbn exceed volume space %d\n", lbn); 799 return (ESTALE); 800 } 801 802 off = blkoff(imp, ino); 803 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) 804 { 805 vput(vp); 806 printf("fhtovp: crosses block boundary %d\n", 807 off + ISO_DIRECTORY_RECORD_SIZE); 808 return (ESTALE); 809 } 810 811 error = bread(imp->im_devvp, 812 lbn << (imp->im_bshift - DEV_BSHIFT), 813 imp->logical_block_size, NOCRED, &bp); 814 if (error) { 815 vput(vp); 816 brelse(bp); 817 printf("fhtovp: bread error %d\n",error); 818 return (error); 819 } 820 isodir = (struct iso_directory_record *)(bp->b_data + off); 821 822 if (off + isonum_711(isodir->length) > 823 imp->logical_block_size) { 824 vput(vp); 825 if (bp != 0) 826 brelse(bp); 827 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 828 off +isonum_711(isodir->length), off, 829 isonum_711(isodir->length)); 830 return (ESTALE); 831 } 832 833 #if 0 834 if (isonum_733(isodir->extent) + 835 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 836 if (bp != 0) 837 brelse(bp); 838 printf("fhtovp: file start miss %d vs %d\n", 839 isonum_733(isodir->extent) + 840 isonum_711(isodir->ext_attr_length), 841 ifhp->ifid_start); 842 return (ESTALE); 843 } 844 #endif 845 } else 846 bp = 0; 847 848 ip->i_mnt = imp; 849 ip->i_devvp = imp->im_devvp; 850 VREF(ip->i_devvp); 851 852 if (relocated) { 853 /* 854 * On relocated directories we must 855 * read the `.' entry out of a dir. 856 */ 857 ip->iso_start = ino >> imp->im_bshift; 858 if (bp != 0) 859 brelse(bp); 860 if ((error = cd9660_bufatoff(ip, (off_t)0, NULL, &bp)) != 0) { 861 vput(vp); 862 return (error); 863 } 864 isodir = (struct iso_directory_record *)bp->b_data; 865 } 866 867 ip->iso_extent = isonum_733(isodir->extent); 868 ip->i_size = (u_int32_t) isonum_733(isodir->size); 869 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 870 871 /* 872 * Setup time stamp, attribute 873 */ 874 vp->v_type = VNON; 875 switch (imp->iso_ftype) { 876 default: /* ISO_FTYPE_9660 */ 877 { 878 struct buf *bp2; 879 int off; 880 if ((imp->im_flags & ISOFSMNT_EXTATT) && 881 (off = isonum_711(isodir->ext_attr_length))) 882 cd9660_bufatoff(ip, (off_t)-(off << imp->im_bshift), 883 NULL, &bp2); 884 else 885 bp2 = NULL; 886 cd9660_defattr(isodir, ip, bp2); 887 cd9660_deftstamp(isodir, ip, bp2); 888 if (bp2) 889 brelse(bp2); 890 break; 891 } 892 case ISO_FTYPE_RRIP: 893 cd9660_rrip_analyze(isodir, ip, imp); 894 break; 895 } 896 897 if (bp != 0) 898 brelse(bp); 899 900 /* 901 * Initialize the associated vnode 902 */ 903 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 904 case VFIFO: 905 #ifdef FIFO 906 vp->v_op = cd9660_fifoop_p; 907 break; 908 #else 909 vput(vp); 910 return (EOPNOTSUPP); 911 #endif /* FIFO */ 912 case VCHR: 913 case VBLK: 914 /* 915 * if device, look at device number table for translation 916 */ 917 #ifdef ISODEVMAP 918 if (dp = iso_dmap(dev, ino, 0)) 919 ip->inode.iso_rdev = dp->d_dev; 920 #endif 921 vp->v_op = cd9660_specop_p; 922 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 923 /* 924 * Discard unneeded vnode, but save its iso_node. 925 * Note that the lock is carried over in the iso_node 926 */ 927 nvp->v_data = vp->v_data; 928 vp->v_data = NULL; 929 vp->v_op = spec_vnodeop_p; 930 vrele(vp); 931 vgone(vp); 932 /* 933 * Reinitialize aliased inode. 934 */ 935 vp = nvp; 936 ip->i_vnode = vp; 937 } 938 break; 939 case VLNK: 940 case VNON: 941 case VSOCK: 942 case VDIR: 943 case VBAD: 944 break; 945 case VREG: 946 uvm_vnp_setsize(vp, ip->i_size); 947 break; 948 } 949 950 if (ip->iso_extent == imp->root_extent) 951 vp->v_flag |= VROOT; 952 953 /* 954 * XXX need generation number? 955 */ 956 957 *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 register struct iso_node *ip = VTOI(vp); 971 register 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 /* 987 * Verify a remote client has export rights and return these rights via 988 * exflagsp and credanonp. 989 */ 990 int 991 cd9660_check_export(mp, nam, exflagsp, credanonp) 992 register struct mount *mp; 993 struct mbuf *nam; 994 int *exflagsp; 995 struct ucred **credanonp; 996 { 997 register struct netcred *np; 998 register struct iso_mnt *imp = VFSTOISOFS(mp); 999 1000 /* 1001 * Get the export permission structure for this <mp, client> tuple. 1002 */ 1003 np = vfs_export_lookup(mp, &imp->im_export, nam); 1004 if (np == NULL) 1005 return (EACCES); 1006 1007 *exflagsp = np->netc_exflags; 1008 *credanonp = &np->netc_anon; 1009 return (0); 1010 } 1011