1 /* $OpenBSD: cd9660_vfsops.c,v 1.22 2001/06/23 02:14:22 csapuntz 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. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)cd9660_vfsops.c 8.9 (Berkeley) 12/5/94 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/namei.h> 47 #include <sys/proc.h> 48 #include <sys/kernel.h> 49 #include <sys/vnode.h> 50 #include <miscfs/specfs/specdev.h> 51 #include <sys/mount.h> 52 #include <sys/buf.h> 53 #include <sys/file.h> 54 #include <sys/disklabel.h> 55 #include <sys/ioctl.h> 56 #include <sys/errno.h> 57 #include <sys/malloc.h> 58 #include <sys/stat.h> 59 60 #define b_cylin b_resid 61 62 #include <isofs/cd9660/iso.h> 63 #include <isofs/cd9660/cd9660_extern.h> 64 #include <isofs/cd9660/iso_rrip.h> 65 #include <isofs/cd9660/cd9660_node.h> 66 #include <isofs/cd9660/cd9660_mount.h> 67 68 struct vfsops cd9660_vfsops = { 69 cd9660_mount, 70 cd9660_start, 71 cd9660_unmount, 72 cd9660_root, 73 cd9660_quotactl, 74 cd9660_statfs, 75 cd9660_sync, 76 cd9660_vget, 77 cd9660_fhtovp, 78 cd9660_vptofh, 79 cd9660_init, 80 cd9660_sysctl, 81 cd9660_check_export 82 }; 83 84 /* 85 * Called by vfs_mountroot when iso is going to be mounted as root. 86 */ 87 88 static int iso_mountfs __P((struct vnode *devvp, struct mount *mp, 89 struct proc *p, struct iso_args *argp)); 90 int iso_disklabelspoof __P((dev_t dev, void (*strat) __P((struct buf *)), 91 struct disklabel *lp)); 92 93 int 94 cd9660_mountroot() 95 { 96 struct mount *mp; 97 extern struct vnode *rootvp; 98 struct proc *p = curproc; /* XXX */ 99 int error; 100 struct iso_args args; 101 102 /* 103 * Get vnodes for swapdev and rootdev. 104 */ 105 if ((error = bdevvp(swapdev, &swapdev_vp)) || 106 (error = bdevvp(rootdev, &rootvp))) { 107 printf("cd9660_mountroot: can't setup bdevvp's"); 108 return (error); 109 } 110 111 if ((error = vfs_rootmountalloc("cd9660", "root_device", &mp)) != 0) 112 return (error); 113 args.flags = ISOFSMNT_ROOT; 114 if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) { 115 mp->mnt_vfc->vfc_refcount--; 116 vfs_unbusy(mp, p); 117 free(mp, M_MOUNT); 118 return (error); 119 } 120 simple_lock(&mountlist_slock); 121 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 122 simple_unlock(&mountlist_slock); 123 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 124 vfs_unbusy(mp, p); 125 return (0); 126 } 127 128 /* 129 * VFS Operations. 130 * 131 * mount system call 132 */ 133 int 134 cd9660_mount(mp, path, data, ndp, p) 135 register struct mount *mp; 136 const char *path; 137 void *data; 138 struct nameidata *ndp; 139 struct proc *p; 140 { 141 struct vnode *devvp; 142 struct iso_args args; 143 size_t size; 144 int error; 145 struct iso_mnt *imp = NULL; 146 147 error = copyin(data, &args, sizeof (struct iso_args)); 148 if (error) 149 return (error); 150 151 if ((mp->mnt_flag & MNT_RDONLY) == 0) 152 return (EROFS); 153 154 /* 155 * If updating, check whether changing from read-only to 156 * read/write; if there is no device name, that's all we do. 157 */ 158 if (mp->mnt_flag & MNT_UPDATE) { 159 imp = VFSTOISOFS(mp); 160 if (args.fspec == 0) 161 return (vfs_export(mp, &imp->im_export, &args.export)); 162 } 163 /* 164 * Not an update, or updating the name: look up the name 165 * and verify that it refers to a sensible block device. 166 */ 167 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 168 if ((error = namei(ndp)) != 0) 169 return (error); 170 devvp = ndp->ni_vp; 171 172 if (devvp->v_type != VBLK) { 173 vrele(devvp); 174 return (ENOTBLK); 175 } 176 if (major(devvp->v_rdev) >= nblkdev) { 177 vrele(devvp); 178 return (ENXIO); 179 } 180 /* 181 * If mount by non-root, then verify that user has necessary 182 * permissions on the device. 183 */ 184 if (p->p_ucred->cr_uid != 0) { 185 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 186 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 187 if (error) { 188 vput(devvp); 189 return (error); 190 } 191 VOP_UNLOCK(devvp, 0, p); 192 } 193 if ((mp->mnt_flag & MNT_UPDATE) == 0) 194 error = iso_mountfs(devvp, mp, p, &args); 195 else { 196 if (devvp != imp->im_devvp) 197 error = EINVAL; /* needs translation */ 198 else 199 vrele(devvp); 200 } 201 if (error) { 202 vrele(devvp); 203 return (error); 204 } 205 imp = VFSTOISOFS(mp); 206 (void)copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 207 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 208 (void)copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 209 &size); 210 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 211 bcopy(&args, &mp->mnt_stat.mount_info.iso_args, sizeof(args)); 212 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 213 return (0); 214 } 215 216 /* 217 * Common code for mount and mountroot 218 */ 219 static int 220 iso_mountfs(devvp, mp, p, argp) 221 register struct vnode *devvp; 222 struct mount *mp; 223 struct proc *p; 224 struct iso_args *argp; 225 { 226 register struct iso_mnt *isomp = (struct iso_mnt *)0; 227 struct buf *bp = NULL; 228 struct buf *pribp = NULL, *supbp = NULL; 229 dev_t dev = devvp->v_rdev; 230 int error = EINVAL; 231 int needclose = 0; 232 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 233 extern struct vnode *rootvp; 234 int iso_bsize; 235 int iso_blknum; 236 int joliet_level; 237 struct iso_volume_descriptor *vdp; 238 struct iso_primary_descriptor *pri = NULL; 239 struct iso_supplementary_descriptor *sup = NULL; 240 struct iso_directory_record *rootp; 241 int logical_block_size; 242 243 if (!ronly) 244 return (EROFS); 245 246 /* 247 * Disallow multiple mounts of the same device. 248 * Disallow mounting of a device that is currently in use 249 * (except for root, which might share swap device for miniroot). 250 * Flush out any old buffers remaining from a previous use. 251 */ 252 if ((error = vfs_mountedon(devvp)) != 0) 253 return (error); 254 if (vcount(devvp) > 1 && devvp != rootvp) 255 return (EBUSY); 256 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 257 return (error); 258 259 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 260 if (error) 261 return (error); 262 needclose = 1; 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 joliet_level = 0; 271 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 272 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 273 iso_bsize, NOCRED, &bp)) != 0) 274 goto out; 275 276 vdp = (struct iso_volume_descriptor *)bp->b_data; 277 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 278 error = EINVAL; 279 goto out; 280 } 281 282 switch (isonum_711 (vdp->type)){ 283 case ISO_VD_PRIMARY: 284 if (pribp == NULL) { 285 pribp = bp; 286 bp = NULL; 287 pri = (struct iso_primary_descriptor *)vdp; 288 } 289 break; 290 case ISO_VD_SUPPLEMENTARY: 291 if (supbp == NULL) { 292 supbp = bp; 293 bp = NULL; 294 sup = (struct iso_supplementary_descriptor *)vdp; 295 296 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 297 if (bcmp(sup->escape, "%/@", 3) == 0) 298 joliet_level = 1; 299 if (bcmp(sup->escape, "%/C", 3) == 0) 300 joliet_level = 2; 301 if (bcmp(sup->escape, "%/E", 3) == 0) 302 joliet_level = 3; 303 304 if (isonum_711 (sup->flags) & 1) 305 joliet_level = 0; 306 } 307 } 308 break; 309 310 case ISO_VD_END: 311 goto vd_end; 312 313 default: 314 break; 315 } 316 if (bp) { 317 brelse(bp); 318 bp = NULL; 319 } 320 } 321 vd_end: 322 if (bp) { 323 brelse(bp); 324 bp = NULL; 325 } 326 327 if (pri == NULL) { 328 error = EINVAL; 329 goto out; 330 } 331 332 logical_block_size = isonum_723 (pri->logical_block_size); 333 334 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 335 || (logical_block_size & (logical_block_size - 1)) != 0) { 336 error = EINVAL; 337 goto out; 338 } 339 340 rootp = (struct iso_directory_record *)pri->root_directory_record; 341 342 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 343 bzero((caddr_t)isomp, sizeof *isomp); 344 isomp->logical_block_size = logical_block_size; 345 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 346 bcopy (rootp, isomp->root, sizeof isomp->root); 347 isomp->root_extent = isonum_733 (rootp->extent); 348 isomp->root_size = isonum_733 (rootp->size); 349 isomp->joliet_level = 0; 350 351 isomp->im_bmask = logical_block_size - 1; 352 isomp->im_bshift = ffs(logical_block_size) - 1; 353 354 pribp->b_flags |= B_AGE; 355 brelse(pribp); 356 pribp = NULL; 357 358 mp->mnt_data = (qaddr_t)isomp; 359 mp->mnt_stat.f_fsid.val[0] = (long)dev; 360 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 361 mp->mnt_maxsymlinklen = 0; 362 mp->mnt_flag |= MNT_LOCAL; 363 isomp->im_mountp = mp; 364 isomp->im_dev = dev; 365 isomp->im_devvp = devvp; 366 367 devvp->v_specmountpoint = mp; 368 369 /* Check the Rock Ridge Extention support */ 370 if (!(argp->flags & ISOFSMNT_NORRIP)) { 371 if ((error = bread(isomp->im_devvp, (isomp->root_extent + 372 isonum_711(rootp->ext_attr_length)) << 373 (isomp->im_bshift - DEV_BSHIFT), 374 isomp->logical_block_size, NOCRED, &bp)) != 0) 375 goto out; 376 377 rootp = (struct iso_directory_record *)bp->b_data; 378 379 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 380 argp->flags |= ISOFSMNT_NORRIP; 381 } else { 382 argp->flags &= ~ISOFSMNT_GENS; 383 } 384 385 /* 386 * The contents are valid, 387 * but they will get reread as part of another vnode, so... 388 */ 389 bp->b_flags |= B_AGE; 390 brelse(bp); 391 bp = NULL; 392 } 393 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 394 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 395 switch (isomp->im_flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS)) { 396 default: 397 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 398 break; 399 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 400 isomp->iso_ftype = ISO_FTYPE_9660; 401 break; 402 case 0: 403 isomp->iso_ftype = ISO_FTYPE_RRIP; 404 break; 405 } 406 407 /* Decide whether to use the Joliet descriptor */ 408 409 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 410 rootp = (struct iso_directory_record *) 411 sup->root_directory_record; 412 bcopy(rootp, isomp->root, sizeof isomp->root); 413 isomp->root_extent = isonum_733(rootp->extent); 414 isomp->root_size = isonum_733(rootp->size); 415 isomp->joliet_level = joliet_level; 416 supbp->b_flags |= B_AGE; 417 } 418 419 if (supbp) { 420 brelse(supbp); 421 supbp = NULL; 422 } 423 424 return (0); 425 out: 426 if (bp) 427 brelse(bp); 428 if (supbp) 429 brelse(supbp); 430 if (needclose) 431 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, 432 p); 433 if (isomp) { 434 free((caddr_t)isomp, M_ISOFSMNT); 435 mp->mnt_data = (qaddr_t)0; 436 } 437 return (error); 438 } 439 440 /* 441 * Test to see if the device is an ISOFS filesystem. 442 */ 443 int 444 iso_disklabelspoof(dev, strat, lp) 445 dev_t dev; 446 void (*strat) __P((struct buf *)); 447 register struct disklabel *lp; 448 { 449 struct buf *bp = NULL; 450 struct iso_volume_descriptor *vdp; 451 struct iso_primary_descriptor *pri; 452 int logical_block_size; 453 int error = EINVAL; 454 int iso_blknum; 455 int i; 456 457 bp = geteblk(ISO_DEFAULT_BLOCK_SIZE); 458 bp->b_dev = dev; 459 460 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 461 bp->b_blkno = iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE); 462 bp->b_bcount = ISO_DEFAULT_BLOCK_SIZE; 463 bp->b_flags = B_BUSY | B_READ; 464 bp->b_cylin = bp->b_blkno / lp->d_secpercyl; 465 466 /*printf("d_secsize %d iso_blknum %d b_blkno %d bcount %d\n", 467 lp->d_secsize, iso_blknum, bp->b_blkno, bp->b_bcount);*/ 468 469 (*strat)(bp); 470 471 if (biowait(bp)) 472 goto out; 473 474 vdp = (struct iso_volume_descriptor *)bp->b_data; 475 /*printf("%2x%2x%2x type %2x\n", vdp->id[0], vdp->id[1], 476 vdp->id[2], isonum_711(vdp->type));*/ 477 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0 || 478 isonum_711 (vdp->type) == ISO_VD_END) 479 goto out; 480 481 if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) 482 break; 483 } 484 485 if (isonum_711 (vdp->type) != ISO_VD_PRIMARY) 486 goto out; 487 488 pri = (struct iso_primary_descriptor *)vdp; 489 logical_block_size = isonum_723 (pri->logical_block_size); 490 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE || 491 (logical_block_size & (logical_block_size - 1)) != 0) 492 goto out; 493 494 /* 495 * build a disklabel for the CD 496 */ 497 strncpy(lp->d_typename, pri->volume_id, 16); 498 strncpy(lp->d_packname, pri->volume_id+16, 16); 499 for (i = 0; i < MAXPARTITIONS; i++) { 500 lp->d_partitions[i].p_size = 0; 501 lp->d_partitions[i].p_offset = 0; 502 } 503 lp->d_partitions[0].p_offset = 0; 504 lp->d_partitions[0].p_size = lp->d_secperunit; 505 lp->d_partitions[0].p_fstype = FS_ISO9660; 506 lp->d_partitions[RAW_PART].p_offset = 0; 507 lp->d_partitions[RAW_PART].p_size = lp->d_secperunit; 508 lp->d_partitions[RAW_PART].p_fstype = FS_ISO9660; 509 lp->d_npartitions = RAW_PART + 1; 510 lp->d_bbsize = 8192; /* fake */ 511 lp->d_sbsize = 64*1024; /* fake */ 512 513 lp->d_magic = DISKMAGIC; 514 lp->d_magic2 = DISKMAGIC; 515 lp->d_checksum = dkcksum(lp); 516 error = 0; 517 out: 518 bp->b_flags |= B_INVAL; 519 brelse(bp); 520 return (error); 521 } 522 523 /* 524 * Make a filesystem operational. 525 * Nothing to do at the moment. 526 */ 527 /* ARGSUSED */ 528 int 529 cd9660_start(mp, flags, p) 530 struct mount *mp; 531 int flags; 532 struct proc *p; 533 { 534 return (0); 535 } 536 537 /* 538 * unmount system call 539 */ 540 int 541 cd9660_unmount(mp, mntflags, p) 542 struct mount *mp; 543 int mntflags; 544 struct proc *p; 545 { 546 register struct iso_mnt *isomp; 547 int error, flags = 0; 548 549 if (mntflags & MNT_FORCE) 550 flags |= FORCECLOSE; 551 #if 0 552 mntflushbuf(mp, 0); 553 if (mntinvalbuf(mp)) 554 return (EBUSY); 555 #endif 556 if ((error = vflush(mp, NULLVP, flags)) != 0) 557 return (error); 558 559 isomp = VFSTOISOFS(mp); 560 561 #ifdef ISODEVMAP 562 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 563 iso_dunmap(isomp->im_dev); 564 #endif 565 566 isomp->im_devvp->v_specmountpoint = NULL; 567 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 568 vrele(isomp->im_devvp); 569 free((caddr_t)isomp, M_ISOFSMNT); 570 mp->mnt_data = (qaddr_t)0; 571 mp->mnt_flag &= ~MNT_LOCAL; 572 return (error); 573 } 574 575 /* 576 * Return root of a filesystem 577 */ 578 int 579 cd9660_root(mp, vpp) 580 struct mount *mp; 581 struct vnode **vpp; 582 { 583 struct iso_mnt *imp = VFSTOISOFS(mp); 584 struct iso_directory_record *dp = 585 (struct iso_directory_record *)imp->root; 586 ino_t ino = isodirino(dp, imp); 587 588 /* 589 * With RRIP we must use the `.' entry of the root directory. 590 * Simply tell vget, that it's a relocated directory. 591 */ 592 return (cd9660_vget_internal(mp, ino, vpp, 593 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 594 } 595 596 /* 597 * Do operations associated with quotas, not supported 598 */ 599 /* ARGSUSED */ 600 int 601 cd9660_quotactl(mp, cmd, uid, arg, p) 602 struct mount *mp; 603 int cmd; 604 uid_t uid; 605 caddr_t arg; 606 struct proc *p; 607 { 608 609 return (EOPNOTSUPP); 610 } 611 612 /* 613 * Get file system statistics. 614 */ 615 int 616 cd9660_statfs(mp, sbp, p) 617 struct mount *mp; 618 register struct statfs *sbp; 619 struct proc *p; 620 { 621 register struct iso_mnt *isomp; 622 623 isomp = VFSTOISOFS(mp); 624 625 sbp->f_bsize = isomp->logical_block_size; 626 sbp->f_iosize = sbp->f_bsize; /* XXX */ 627 sbp->f_blocks = isomp->volume_space_size; 628 sbp->f_bfree = 0; /* total free blocks */ 629 sbp->f_bavail = 0; /* blocks free for non superuser */ 630 sbp->f_files = 0; /* total files */ 631 sbp->f_ffree = 0; /* free file nodes */ 632 if (sbp != &mp->mnt_stat) { 633 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 634 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, 635 MNAMELEN); 636 bcopy(&mp->mnt_stat.mount_info.iso_args, 637 &sbp->mount_info.iso_args, sizeof(struct iso_args)); 638 } 639 /* Use the first spare for flags: */ 640 sbp->f_spare[0] = isomp->im_flags; 641 return (0); 642 } 643 644 /* ARGSUSED */ 645 int 646 cd9660_sync(mp, waitfor, cred, p) 647 struct mount *mp; 648 int waitfor; 649 struct ucred *cred; 650 struct proc *p; 651 { 652 return (0); 653 } 654 655 /* 656 * File handle to vnode 657 * 658 * Have to be really careful about stale file handles: 659 * - check that the inode number is in range 660 * - call iget() to get the locked inode 661 * - check for an unallocated inode (i_mode == 0) 662 * - check that the generation number matches 663 */ 664 665 struct ifid { 666 ushort ifid_len; 667 ushort ifid_pad; 668 int ifid_ino; 669 long ifid_start; 670 }; 671 672 /* ARGSUSED */ 673 int 674 cd9660_fhtovp(mp, fhp, vpp) 675 register struct mount *mp; 676 struct fid *fhp; 677 struct vnode **vpp; 678 { 679 struct ifid *ifhp = (struct ifid *)fhp; 680 register struct iso_node *ip; 681 struct vnode *nvp; 682 int error; 683 684 #ifdef ISOFS_DBG 685 printf("fhtovp: ino %d, start %ld\n", ifhp->ifid_ino, 686 ifhp->ifid_start); 687 #endif 688 689 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 690 *vpp = NULLVP; 691 return (error); 692 } 693 ip = VTOI(nvp); 694 if (ip->inode.iso_mode == 0) { 695 vput(nvp); 696 *vpp = NULLVP; 697 return (ESTALE); 698 } 699 *vpp = nvp; 700 return (0); 701 } 702 703 int 704 cd9660_vget(mp, ino, vpp) 705 struct mount *mp; 706 ino_t ino; 707 struct vnode **vpp; 708 { 709 710 /* 711 * XXXX 712 * It would be nice if we didn't always set the `relocated' flag 713 * and force the extra read, but I don't want to think about fixing 714 * that right now. 715 */ 716 return (cd9660_vget_internal(mp, ino, vpp, 717 #if 0 718 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 719 #else 720 0, 721 #endif 722 NULL)); 723 } 724 725 int 726 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 727 struct mount *mp; 728 ino_t ino; 729 struct vnode **vpp; 730 int relocated; 731 struct iso_directory_record *isodir; 732 { 733 register struct iso_mnt *imp; 734 struct iso_node *ip; 735 struct buf *bp; 736 struct vnode *vp, *nvp; 737 dev_t dev; 738 int error; 739 740 retry: 741 imp = VFSTOISOFS(mp); 742 dev = imp->im_dev; 743 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 744 return (0); 745 746 /* Allocate a new vnode/iso_node. */ 747 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 748 *vpp = NULLVP; 749 return (error); 750 } 751 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 752 M_WAITOK); 753 bzero((caddr_t)ip, sizeof(struct iso_node)); 754 lockinit(&ip->i_lock, PINOD, "isoinode", 0, 0); 755 vp->v_data = ip; 756 ip->i_vnode = vp; 757 ip->i_dev = dev; 758 ip->i_number = ino; 759 760 /* 761 * Put it onto its hash chain and lock it so that other requests for 762 * this inode will block if they arrive while we are sleeping waiting 763 * for old data structures to be purged or for the contents of the 764 * disk portion of this inode to be read. 765 */ 766 error = cd9660_ihashins(ip); 767 768 if (error) { 769 vrele(vp); 770 771 if (error == EEXIST) 772 goto retry; 773 774 return (error); 775 } 776 777 if (isodir == 0) { 778 int lbn, off; 779 780 lbn = lblkno(imp, ino); 781 if (lbn >= imp->volume_space_size) { 782 vput(vp); 783 printf("fhtovp: lbn exceed volume space %d\n", lbn); 784 return (ESTALE); 785 } 786 787 off = blkoff(imp, ino); 788 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) 789 { 790 vput(vp); 791 printf("fhtovp: crosses block boundary %d\n", 792 off + ISO_DIRECTORY_RECORD_SIZE); 793 return (ESTALE); 794 } 795 796 error = bread(imp->im_devvp, 797 lbn << (imp->im_bshift - DEV_BSHIFT), 798 imp->logical_block_size, NOCRED, &bp); 799 if (error) { 800 vput(vp); 801 brelse(bp); 802 printf("fhtovp: bread error %d\n",error); 803 return (error); 804 } 805 isodir = (struct iso_directory_record *)(bp->b_data + off); 806 807 if (off + isonum_711(isodir->length) > 808 imp->logical_block_size) { 809 vput(vp); 810 if (bp != 0) 811 brelse(bp); 812 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 813 off +isonum_711(isodir->length), off, 814 isonum_711(isodir->length)); 815 return (ESTALE); 816 } 817 818 #if 0 819 if (isonum_733(isodir->extent) + 820 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 821 if (bp != 0) 822 brelse(bp); 823 printf("fhtovp: file start miss %d vs %d\n", 824 isonum_733(isodir->extent) + 825 isonum_711(isodir->ext_attr_length), 826 ifhp->ifid_start); 827 return (ESTALE); 828 } 829 #endif 830 } else 831 bp = 0; 832 833 ip->i_mnt = imp; 834 ip->i_devvp = imp->im_devvp; 835 VREF(ip->i_devvp); 836 837 if (relocated) { 838 /* 839 * On relocated directories we must 840 * read the `.' entry out of a dir. 841 */ 842 ip->iso_start = ino >> imp->im_bshift; 843 if (bp != 0) 844 brelse(bp); 845 if ((error = cd9660_bufatoff(ip, (off_t)0, NULL, &bp)) != 0) { 846 vput(vp); 847 return (error); 848 } 849 isodir = (struct iso_directory_record *)bp->b_data; 850 } 851 852 ip->iso_extent = isonum_733(isodir->extent); 853 ip->i_size = isonum_733(isodir->size); 854 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 855 856 /* 857 * Setup time stamp, attribute 858 */ 859 vp->v_type = VNON; 860 switch (imp->iso_ftype) { 861 default: /* ISO_FTYPE_9660 */ 862 { 863 struct buf *bp2; 864 int off; 865 if ((imp->im_flags & ISOFSMNT_EXTATT) && 866 (off = isonum_711(isodir->ext_attr_length))) 867 cd9660_bufatoff(ip, (off_t)-(off << imp->im_bshift), 868 NULL, &bp2); 869 else 870 bp2 = NULL; 871 cd9660_defattr(isodir, ip, bp2); 872 cd9660_deftstamp(isodir, ip, bp2); 873 if (bp2) 874 brelse(bp2); 875 break; 876 } 877 case ISO_FTYPE_RRIP: 878 cd9660_rrip_analyze(isodir, ip, imp); 879 break; 880 } 881 882 if (bp != 0) 883 brelse(bp); 884 885 /* 886 * Initialize the associated vnode 887 */ 888 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 889 case VFIFO: 890 #ifdef FIFO 891 vp->v_op = cd9660_fifoop_p; 892 break; 893 #else 894 vput(vp); 895 return (EOPNOTSUPP); 896 #endif /* FIFO */ 897 case VCHR: 898 case VBLK: 899 /* 900 * if device, look at device number table for translation 901 */ 902 #ifdef ISODEVMAP 903 if (dp = iso_dmap(dev, ino, 0)) 904 ip->inode.iso_rdev = dp->d_dev; 905 #endif 906 vp->v_op = cd9660_specop_p; 907 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 908 /* 909 * Discard unneeded vnode, but save its iso_node. 910 * Note that the lock is carried over in the iso_node 911 */ 912 nvp->v_data = vp->v_data; 913 vp->v_data = NULL; 914 vp->v_op = spec_vnodeop_p; 915 vrele(vp); 916 vgone(vp); 917 /* 918 * Reinitialize aliased inode. 919 */ 920 vp = nvp; 921 ip->i_vnode = vp; 922 } 923 break; 924 case VLNK: 925 case VNON: 926 case VSOCK: 927 case VDIR: 928 case VBAD: 929 case VREG: 930 break; 931 } 932 933 if (ip->iso_extent == imp->root_extent) 934 vp->v_flag |= VROOT; 935 936 /* 937 * XXX need generation number? 938 */ 939 940 *vpp = vp; 941 return (0); 942 } 943 944 /* 945 * Vnode pointer to File handle 946 */ 947 /* ARGSUSED */ 948 int 949 cd9660_vptofh(vp, fhp) 950 struct vnode *vp; 951 struct fid *fhp; 952 { 953 register struct iso_node *ip = VTOI(vp); 954 register struct ifid *ifhp; 955 956 ifhp = (struct ifid *)fhp; 957 ifhp->ifid_len = sizeof(struct ifid); 958 959 ifhp->ifid_ino = ip->i_number; 960 ifhp->ifid_start = ip->iso_start; 961 962 #ifdef ISOFS_DBG 963 printf("vptofh: ino %d, start %ld\n", 964 ifhp->ifid_ino,ifhp->ifid_start); 965 #endif 966 return (0); 967 } 968 969 /* 970 * Verify a remote client has export rights and return these rights via 971 * exflagsp and credanonp. 972 */ 973 int 974 cd9660_check_export(mp, nam, exflagsp, credanonp) 975 register struct mount *mp; 976 struct mbuf *nam; 977 int *exflagsp; 978 struct ucred **credanonp; 979 { 980 register struct netcred *np; 981 register struct iso_mnt *imp = VFSTOISOFS(mp); 982 983 /* 984 * Get the export permission structure for this <mp, client> tuple. 985 */ 986 np = vfs_export_lookup(mp, &imp->im_export, nam); 987 if (np == NULL) 988 return (EACCES); 989 990 *exflagsp = np->netc_exflags; 991 *credanonp = &np->netc_anon; 992 return (0); 993 } 994