1 /* $OpenBSD: cd9660_vfsops.c,v 1.60 2011/07/04 20:35:35 deraadt 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/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 (suser(p, 0) != 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 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 229 extern struct vnode *rootvp; 230 int iso_bsize; 231 int iso_blknum; 232 int joliet_level; 233 struct iso_volume_descriptor *vdp; 234 struct iso_primary_descriptor *pri = NULL; 235 struct iso_supplementary_descriptor *sup = NULL; 236 struct iso_directory_record *rootp; 237 int logical_block_size; 238 int sess; 239 240 if (!ronly) 241 return (EROFS); 242 243 /* 244 * Disallow multiple mounts of the same device. 245 * Disallow mounting of a device that is currently in use 246 * (except for root, which might share swap device for miniroot). 247 * Flush out any old buffers remaining from a previous use. 248 */ 249 if ((error = vfs_mountedon(devvp)) != 0) 250 return (error); 251 if (vcount(devvp) > 1 && devvp != rootvp) 252 return (EBUSY); 253 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 254 error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0); 255 VOP_UNLOCK(devvp, 0, p); 256 if (error) 257 return (error); 258 259 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 260 if (error) 261 return (error); 262 263 /* 264 * This is the "logical sector size". The standard says this 265 * should be 2048 or the physical sector size on the device, 266 * whichever is greater. For now, we'll just use a constant. 267 */ 268 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 269 270 if (argp->flags & ISOFSMNT_SESS) { 271 sess = argp->sess; 272 if (sess < 0) 273 sess = 0; 274 } else { 275 sess = 0; 276 error = VOP_IOCTL(devvp, CDIOREADMSADDR, (caddr_t)&sess, 0, 277 FSCRED, p); 278 if (error) 279 sess = 0; 280 } 281 282 joliet_level = 0; 283 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 284 if ((error = bread(devvp, 285 (iso_blknum + sess) * btodb(iso_bsize), 286 iso_bsize, &bp)) != 0) 287 goto out; 288 289 vdp = (struct iso_volume_descriptor *)bp->b_data; 290 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 291 error = EINVAL; 292 goto out; 293 } 294 295 switch (isonum_711 (vdp->type)){ 296 case ISO_VD_PRIMARY: 297 if (pribp == NULL) { 298 pribp = bp; 299 bp = NULL; 300 pri = (struct iso_primary_descriptor *)vdp; 301 } 302 break; 303 case ISO_VD_SUPPLEMENTARY: 304 if (supbp == NULL) { 305 supbp = bp; 306 bp = NULL; 307 sup = (struct iso_supplementary_descriptor *)vdp; 308 309 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 310 if (bcmp(sup->escape, "%/@", 3) == 0) 311 joliet_level = 1; 312 if (bcmp(sup->escape, "%/C", 3) == 0) 313 joliet_level = 2; 314 if (bcmp(sup->escape, "%/E", 3) == 0) 315 joliet_level = 3; 316 317 if (isonum_711 (sup->flags) & 1) 318 joliet_level = 0; 319 } 320 } 321 break; 322 323 case ISO_VD_END: 324 goto vd_end; 325 326 default: 327 break; 328 } 329 if (bp) { 330 brelse(bp); 331 bp = NULL; 332 } 333 } 334 vd_end: 335 if (bp) { 336 brelse(bp); 337 bp = NULL; 338 } 339 340 if (pri == NULL) { 341 error = EINVAL; 342 goto out; 343 } 344 345 logical_block_size = isonum_723 (pri->logical_block_size); 346 347 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 348 || (logical_block_size & (logical_block_size - 1)) != 0) { 349 error = EINVAL; 350 goto out; 351 } 352 353 rootp = (struct iso_directory_record *)pri->root_directory_record; 354 355 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 356 bzero((caddr_t)isomp, sizeof *isomp); 357 isomp->logical_block_size = logical_block_size; 358 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 359 bcopy (rootp, isomp->root, sizeof isomp->root); 360 isomp->root_extent = isonum_733 (rootp->extent); 361 isomp->root_size = isonum_733 (rootp->size); 362 isomp->joliet_level = 0; 363 /* 364 * Since an ISO9660 multi-session CD can also access previous sessions, 365 * we have to include them into the space considerations. 366 */ 367 isomp->volume_space_size += sess; 368 isomp->im_bmask = logical_block_size - 1; 369 isomp->im_bshift = ffs(logical_block_size) - 1; 370 371 pribp->b_flags |= B_AGE; 372 brelse(pribp); 373 pribp = NULL; 374 375 mp->mnt_data = (qaddr_t)isomp; 376 mp->mnt_stat.f_fsid.val[0] = (long)dev; 377 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 378 mp->mnt_maxsymlinklen = 0; 379 mp->mnt_flag |= MNT_LOCAL; 380 isomp->im_mountp = mp; 381 isomp->im_dev = dev; 382 isomp->im_devvp = devvp; 383 384 /* Check the Rock Ridge Extension support */ 385 if (!(argp->flags & ISOFSMNT_NORRIP)) { 386 if ((error = bread(isomp->im_devvp, (isomp->root_extent + 387 isonum_711(rootp->ext_attr_length)) << 388 (isomp->im_bshift - DEV_BSHIFT), 389 isomp->logical_block_size, &bp)) != 0) 390 goto out; 391 392 rootp = (struct iso_directory_record *)bp->b_data; 393 394 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 395 argp->flags |= ISOFSMNT_NORRIP; 396 } else { 397 argp->flags &= ~ISOFSMNT_GENS; 398 } 399 400 /* 401 * The contents are valid, 402 * but they will get reread as part of another vnode, so... 403 */ 404 bp->b_flags |= B_AGE; 405 brelse(bp); 406 bp = NULL; 407 } 408 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 409 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 410 switch (isomp->im_flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS)) { 411 default: 412 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 413 break; 414 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 415 isomp->iso_ftype = ISO_FTYPE_9660; 416 break; 417 case 0: 418 isomp->iso_ftype = ISO_FTYPE_RRIP; 419 break; 420 } 421 422 /* Decide whether to use the Joliet descriptor */ 423 424 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 425 rootp = (struct iso_directory_record *) 426 sup->root_directory_record; 427 bcopy(rootp, isomp->root, sizeof isomp->root); 428 isomp->root_extent = isonum_733(rootp->extent); 429 isomp->root_size = isonum_733(rootp->size); 430 isomp->joliet_level = joliet_level; 431 supbp->b_flags |= B_AGE; 432 } 433 434 if (supbp) { 435 brelse(supbp); 436 supbp = NULL; 437 } 438 439 devvp->v_specmountpoint = mp; 440 441 return (0); 442 out: 443 if (bp) 444 brelse(bp); 445 if (supbp) 446 brelse(supbp); 447 448 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 449 VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 450 VOP_UNLOCK(devvp, 0, p); 451 452 if (isomp) { 453 free((caddr_t)isomp, M_ISOFSMNT); 454 mp->mnt_data = (qaddr_t)0; 455 } 456 return (error); 457 } 458 459 /* 460 * Test to see if the device is an ISOFS filesystem. 461 */ 462 int 463 iso_disklabelspoof(dev, strat, lp) 464 dev_t dev; 465 void (*strat)(struct buf *); 466 register struct disklabel *lp; 467 { 468 struct buf *bp = NULL; 469 struct iso_volume_descriptor *vdp; 470 struct iso_primary_descriptor *pri; 471 int logical_block_size; 472 int error = EINVAL; 473 int iso_blknum; 474 int i; 475 476 bp = geteblk(ISO_DEFAULT_BLOCK_SIZE); 477 bp->b_dev = dev; 478 479 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 480 bp->b_blkno = iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE); 481 bp->b_bcount = ISO_DEFAULT_BLOCK_SIZE; 482 CLR(bp->b_flags, B_READ | B_WRITE | B_DONE); 483 SET(bp->b_flags, B_BUSY | B_READ | B_RAW); 484 bp->b_cylinder = bp->b_blkno / lp->d_secpercyl; 485 486 /*printf("d_secsize %d iso_blknum %d b_blkno %d bcount %d\n", 487 lp->d_secsize, iso_blknum, bp->b_blkno, bp->b_bcount);*/ 488 489 (*strat)(bp); 490 491 if (biowait(bp)) 492 goto out; 493 494 vdp = (struct iso_volume_descriptor *)bp->b_data; 495 /*printf("%2x%2x%2x type %2x\n", vdp->id[0], vdp->id[1], 496 vdp->id[2], isonum_711(vdp->type));*/ 497 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0 || 498 isonum_711 (vdp->type) == ISO_VD_END) 499 goto out; 500 501 if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) 502 break; 503 } 504 505 if (isonum_711 (vdp->type) != ISO_VD_PRIMARY) 506 goto out; 507 508 pri = (struct iso_primary_descriptor *)vdp; 509 logical_block_size = isonum_723 (pri->logical_block_size); 510 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE || 511 (logical_block_size & (logical_block_size - 1)) != 0) 512 goto out; 513 514 /* 515 * build a disklabel for the CD 516 */ 517 strncpy(lp->d_typename, pri->volume_id, sizeof lp->d_typename); 518 strncpy(lp->d_packname, pri->volume_id+16, sizeof lp->d_packname); 519 for (i = 0; i < MAXPARTITIONS; i++) { 520 DL_SETPSIZE(&lp->d_partitions[i], 0); 521 DL_SETPOFFSET(&lp->d_partitions[i], 0); 522 } 523 DL_SETPOFFSET(&lp->d_partitions[0], 0); 524 DL_SETPSIZE(&lp->d_partitions[0], DL_GETDSIZE(lp)); 525 lp->d_partitions[0].p_fstype = FS_ISO9660; 526 DL_SETPOFFSET(&lp->d_partitions[RAW_PART], 0); 527 DL_SETPSIZE(&lp->d_partitions[RAW_PART], DL_GETDSIZE(lp)); 528 lp->d_partitions[RAW_PART].p_fstype = FS_ISO9660; 529 lp->d_npartitions = MAXPARTITIONS; 530 lp->d_bbsize = 8192; /* fake */ 531 lp->d_sbsize = 64*1024; /* fake */ 532 lp->d_version = 1; 533 534 lp->d_magic = DISKMAGIC; 535 lp->d_magic2 = DISKMAGIC; 536 lp->d_checksum = dkcksum(lp); 537 error = 0; 538 out: 539 bp->b_flags |= B_INVAL; 540 brelse(bp); 541 return (error); 542 } 543 544 /* 545 * Make a filesystem operational. 546 * Nothing to do at the moment. 547 */ 548 /* ARGSUSED */ 549 int 550 cd9660_start(mp, flags, p) 551 struct mount *mp; 552 int flags; 553 struct proc *p; 554 { 555 return (0); 556 } 557 558 /* 559 * unmount system call 560 */ 561 int 562 cd9660_unmount(mp, mntflags, p) 563 struct mount *mp; 564 int mntflags; 565 struct proc *p; 566 { 567 register struct iso_mnt *isomp; 568 int error, flags = 0; 569 570 if (mntflags & MNT_FORCE) 571 flags |= FORCECLOSE; 572 #if 0 573 mntflushbuf(mp, 0); 574 if (mntinvalbuf(mp)) 575 return (EBUSY); 576 #endif 577 if ((error = vflush(mp, NULLVP, flags)) != 0) 578 return (error); 579 580 isomp = VFSTOISOFS(mp); 581 582 #ifdef ISODEVMAP 583 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 584 iso_dunmap(isomp->im_dev); 585 #endif 586 587 isomp->im_devvp->v_specmountpoint = NULL; 588 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY, p); 589 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 590 vput(isomp->im_devvp); 591 free((caddr_t)isomp, M_ISOFSMNT); 592 mp->mnt_data = (qaddr_t)0; 593 mp->mnt_flag &= ~MNT_LOCAL; 594 return (error); 595 } 596 597 /* 598 * Return root of a filesystem 599 */ 600 int 601 cd9660_root(mp, vpp) 602 struct mount *mp; 603 struct vnode **vpp; 604 { 605 struct iso_mnt *imp = VFSTOISOFS(mp); 606 struct iso_directory_record *dp = 607 (struct iso_directory_record *)imp->root; 608 ino_t ino = isodirino(dp, imp); 609 610 /* 611 * With RRIP we must use the `.' entry of the root directory. 612 * Simply tell vget, that it's a relocated directory. 613 */ 614 return (cd9660_vget_internal(mp, ino, vpp, 615 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 616 } 617 618 /* 619 * Do operations associated with quotas, not supported 620 */ 621 /* ARGSUSED */ 622 int 623 cd9660_quotactl(mp, cmd, uid, arg, p) 624 struct mount *mp; 625 int cmd; 626 uid_t uid; 627 caddr_t arg; 628 struct proc *p; 629 { 630 631 return (EOPNOTSUPP); 632 } 633 634 /* 635 * Get file system statistics. 636 */ 637 int 638 cd9660_statfs(mp, sbp, p) 639 struct mount *mp; 640 register struct statfs *sbp; 641 struct proc *p; 642 { 643 register struct iso_mnt *isomp; 644 645 isomp = VFSTOISOFS(mp); 646 647 sbp->f_bsize = isomp->logical_block_size; 648 sbp->f_iosize = sbp->f_bsize; /* XXX */ 649 sbp->f_blocks = isomp->volume_space_size; 650 sbp->f_bfree = 0; /* total free blocks */ 651 sbp->f_bavail = 0; /* blocks free for non superuser */ 652 sbp->f_files = 0; /* total files */ 653 sbp->f_ffree = 0; /* free file nodes */ 654 if (sbp != &mp->mnt_stat) { 655 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 656 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, 657 MNAMELEN); 658 bcopy(&mp->mnt_stat.mount_info.iso_args, 659 &sbp->mount_info.iso_args, sizeof(struct iso_args)); 660 } 661 /* Use the first spare for flags: */ 662 sbp->f_spare[0] = isomp->im_flags; 663 return (0); 664 } 665 666 /* ARGSUSED */ 667 int 668 cd9660_sync(mp, waitfor, cred, p) 669 struct mount *mp; 670 int waitfor; 671 struct ucred *cred; 672 struct proc *p; 673 { 674 return (0); 675 } 676 677 /* 678 * File handle to vnode 679 * 680 * Have to be really careful about stale file handles: 681 * - check that the inode number is in range 682 * - call iget() to get the locked inode 683 * - check for an unallocated inode (i_mode == 0) 684 * - check that the generation number matches 685 */ 686 687 struct ifid { 688 ushort ifid_len; 689 ushort ifid_pad; 690 int ifid_ino; 691 long ifid_start; 692 }; 693 694 /* ARGSUSED */ 695 int 696 cd9660_fhtovp(mp, fhp, vpp) 697 register struct mount *mp; 698 struct fid *fhp; 699 struct vnode **vpp; 700 { 701 struct ifid *ifhp = (struct ifid *)fhp; 702 register struct iso_node *ip; 703 struct vnode *nvp; 704 int error; 705 706 #ifdef ISOFS_DBG 707 printf("fhtovp: ino %d, start %ld\n", ifhp->ifid_ino, 708 ifhp->ifid_start); 709 #endif 710 711 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 712 *vpp = NULLVP; 713 return (error); 714 } 715 ip = VTOI(nvp); 716 if (ip->inode.iso_mode == 0) { 717 vput(nvp); 718 *vpp = NULLVP; 719 return (ESTALE); 720 } 721 *vpp = nvp; 722 return (0); 723 } 724 725 int 726 cd9660_vget(mp, ino, vpp) 727 struct mount *mp; 728 ino_t ino; 729 struct vnode **vpp; 730 { 731 732 /* 733 * XXXX 734 * It would be nice if we didn't always set the `relocated' flag 735 * and force the extra read, but I don't want to think about fixing 736 * that right now. 737 */ 738 return (cd9660_vget_internal(mp, ino, vpp, 739 #if 0 740 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 741 #else 742 0, 743 #endif 744 NULL)); 745 } 746 747 int 748 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 749 struct mount *mp; 750 ino_t ino; 751 struct vnode **vpp; 752 int relocated; 753 struct iso_directory_record *isodir; 754 { 755 register struct iso_mnt *imp; 756 struct iso_node *ip; 757 struct buf *bp; 758 struct vnode *vp, *nvp; 759 dev_t dev; 760 int error; 761 762 retry: 763 imp = VFSTOISOFS(mp); 764 dev = imp->im_dev; 765 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 766 return (0); 767 768 /* Allocate a new vnode/iso_node. */ 769 if ((error = getnewvnode(VT_ISOFS, mp, &cd9660_vops, &vp)) != 0) { 770 *vpp = NULLVP; 771 return (error); 772 } 773 ip = malloc(sizeof(*ip), M_ISOFSNODE, M_WAITOK | M_ZERO); 774 lockinit(&ip->i_lock, PINOD, "isoinode", 0, 0); 775 vp->v_data = ip; 776 ip->i_vnode = vp; 777 ip->i_dev = dev; 778 ip->i_number = ino; 779 780 /* 781 * Put it onto its hash chain and lock it so that other requests for 782 * this inode will block if they arrive while we are sleeping waiting 783 * for old data structures to be purged or for the contents of the 784 * disk portion of this inode to be read. 785 */ 786 error = cd9660_ihashins(ip); 787 788 if (error) { 789 vrele(vp); 790 791 if (error == EEXIST) 792 goto retry; 793 794 return (error); 795 } 796 797 if (isodir == 0) { 798 int lbn, off; 799 800 lbn = lblkno(imp, ino); 801 if (lbn >= imp->volume_space_size) { 802 vput(vp); 803 printf("fhtovp: lbn exceed volume space %d\n", lbn); 804 return (ESTALE); 805 } 806 807 off = blkoff(imp, ino); 808 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) 809 { 810 vput(vp); 811 printf("fhtovp: crosses block boundary %d\n", 812 off + ISO_DIRECTORY_RECORD_SIZE); 813 return (ESTALE); 814 } 815 816 error = bread(imp->im_devvp, 817 lbn << (imp->im_bshift - DEV_BSHIFT), 818 imp->logical_block_size, &bp); 819 if (error) { 820 vput(vp); 821 brelse(bp); 822 printf("fhtovp: bread error %d\n",error); 823 return (error); 824 } 825 isodir = (struct iso_directory_record *)(bp->b_data + off); 826 827 if (off + isonum_711(isodir->length) > 828 imp->logical_block_size) { 829 vput(vp); 830 if (bp != 0) 831 brelse(bp); 832 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 833 off +isonum_711(isodir->length), off, 834 isonum_711(isodir->length)); 835 return (ESTALE); 836 } 837 838 #if 0 839 if (isonum_733(isodir->extent) + 840 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 841 if (bp != 0) 842 brelse(bp); 843 printf("fhtovp: file start miss %d vs %d\n", 844 isonum_733(isodir->extent) + 845 isonum_711(isodir->ext_attr_length), 846 ifhp->ifid_start); 847 return (ESTALE); 848 } 849 #endif 850 } else 851 bp = 0; 852 853 ip->i_mnt = imp; 854 ip->i_devvp = imp->im_devvp; 855 vref(ip->i_devvp); 856 857 if (relocated) { 858 /* 859 * On relocated directories we must 860 * read the `.' entry out of a dir. 861 */ 862 ip->iso_start = ino >> imp->im_bshift; 863 if (bp != 0) 864 brelse(bp); 865 if ((error = cd9660_bufatoff(ip, (off_t)0, NULL, &bp)) != 0) { 866 vput(vp); 867 return (error); 868 } 869 isodir = (struct iso_directory_record *)bp->b_data; 870 } 871 872 ip->iso_extent = isonum_733(isodir->extent); 873 ip->i_size = (u_int32_t) isonum_733(isodir->size); 874 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 875 876 /* 877 * Setup time stamp, attribute 878 */ 879 vp->v_type = VNON; 880 switch (imp->iso_ftype) { 881 default: /* ISO_FTYPE_9660 */ 882 { 883 struct buf *bp2; 884 int off; 885 if ((imp->im_flags & ISOFSMNT_EXTATT) && 886 (off = isonum_711(isodir->ext_attr_length))) 887 cd9660_bufatoff(ip, (off_t)-(off << imp->im_bshift), 888 NULL, &bp2); 889 else 890 bp2 = NULL; 891 cd9660_defattr(isodir, ip, bp2); 892 cd9660_deftstamp(isodir, ip, bp2); 893 if (bp2) 894 brelse(bp2); 895 break; 896 } 897 case ISO_FTYPE_RRIP: 898 cd9660_rrip_analyze(isodir, ip, imp); 899 break; 900 } 901 902 if (bp != 0) 903 brelse(bp); 904 905 /* 906 * Initialize the associated vnode 907 */ 908 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 909 case VFIFO: 910 #ifdef FIFO 911 vp->v_op = &cd9660_fifovops; 912 break; 913 #else 914 vput(vp); 915 return (EOPNOTSUPP); 916 #endif /* FIFO */ 917 case VCHR: 918 case VBLK: 919 /* 920 * if device, look at device number table for translation 921 */ 922 #ifdef ISODEVMAP 923 if (dp = iso_dmap(dev, ino, 0)) 924 ip->inode.iso_rdev = dp->d_dev; 925 #endif 926 vp->v_op = &cd9660_specvops; 927 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 928 /* 929 * Discard unneeded vnode, but save its iso_node. 930 * Note that the lock is carried over in the iso_node 931 */ 932 nvp->v_data = vp->v_data; 933 vp->v_data = NULL; 934 vp->v_op = &spec_vops; 935 vrele(vp); 936 vgone(vp); 937 /* 938 * Reinitialize aliased inode. 939 */ 940 vp = nvp; 941 ip->i_vnode = vp; 942 } 943 break; 944 case VLNK: 945 case VNON: 946 case VSOCK: 947 case VDIR: 948 case VBAD: 949 break; 950 case VREG: 951 uvm_vnp_setsize(vp, ip->i_size); 952 break; 953 } 954 955 if (ip->iso_extent == imp->root_extent) 956 vp->v_flag |= VROOT; 957 958 /* 959 * XXX need generation number? 960 */ 961 962 *vpp = vp; 963 return (0); 964 } 965 966 /* 967 * Vnode pointer to File handle 968 */ 969 /* ARGSUSED */ 970 int 971 cd9660_vptofh(vp, fhp) 972 struct vnode *vp; 973 struct fid *fhp; 974 { 975 register struct iso_node *ip = VTOI(vp); 976 register struct ifid *ifhp; 977 978 ifhp = (struct ifid *)fhp; 979 ifhp->ifid_len = sizeof(struct ifid); 980 981 ifhp->ifid_ino = ip->i_number; 982 ifhp->ifid_start = ip->iso_start; 983 984 #ifdef ISOFS_DBG 985 printf("vptofh: ino %d, start %ld\n", 986 ifhp->ifid_ino,ifhp->ifid_start); 987 #endif 988 return (0); 989 } 990 991 /* 992 * Verify a remote client has export rights and return these rights via 993 * exflagsp and credanonp. 994 */ 995 int 996 cd9660_check_export(mp, nam, exflagsp, credanonp) 997 register struct mount *mp; 998 struct mbuf *nam; 999 int *exflagsp; 1000 struct ucred **credanonp; 1001 { 1002 register struct netcred *np; 1003 register struct iso_mnt *imp = VFSTOISOFS(mp); 1004 1005 /* 1006 * Get the export permission structure for this <mp, client> tuple. 1007 */ 1008 np = vfs_export_lookup(mp, &imp->im_export, nam); 1009 if (np == NULL) 1010 return (EACCES); 1011 1012 *exflagsp = np->netc_exflags; 1013 *credanonp = &np->netc_anon; 1014 return (0); 1015 } 1016