1 /* $OpenBSD: cd9660_vfsops.c,v 1.27 2001/12/19 08:58:06 art 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 67 struct vfsops cd9660_vfsops = { 68 cd9660_mount, 69 cd9660_start, 70 cd9660_unmount, 71 cd9660_root, 72 cd9660_quotactl, 73 cd9660_statfs, 74 cd9660_sync, 75 cd9660_vget, 76 cd9660_fhtovp, 77 cd9660_vptofh, 78 cd9660_init, 79 cd9660_sysctl, 80 cd9660_check_export 81 }; 82 83 /* 84 * Called by vfs_mountroot when iso is going to be mounted as root. 85 */ 86 87 static int iso_mountfs __P((struct vnode *devvp, struct mount *mp, 88 struct proc *p, struct iso_args *argp)); 89 int iso_disklabelspoof __P((dev_t dev, void (*strat) __P((struct buf *)), 90 struct disklabel *lp)); 91 92 int 93 cd9660_mountroot() 94 { 95 struct mount *mp; 96 extern struct vnode *rootvp; 97 struct proc *p = curproc; /* XXX */ 98 int error; 99 struct iso_args args; 100 101 /* 102 * Get vnodes for swapdev and rootdev. 103 */ 104 if ((error = bdevvp(swapdev, &swapdev_vp)) || 105 (error = bdevvp(rootdev, &rootvp))) { 106 printf("cd9660_mountroot: can't setup bdevvp's"); 107 return (error); 108 } 109 110 if ((error = vfs_rootmountalloc("cd9660", "root_device", &mp)) != 0) 111 return (error); 112 args.flags = ISOFSMNT_ROOT; 113 if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) { 114 mp->mnt_vfc->vfc_refcount--; 115 vfs_unbusy(mp, p); 116 free(mp, M_MOUNT); 117 return (error); 118 } 119 simple_lock(&mountlist_slock); 120 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 121 simple_unlock(&mountlist_slock); 122 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 123 vfs_unbusy(mp, p); 124 return (0); 125 } 126 127 /* 128 * VFS Operations. 129 * 130 * mount system call 131 */ 132 int 133 cd9660_mount(mp, path, data, ndp, p) 134 register struct mount *mp; 135 const char *path; 136 void *data; 137 struct nameidata *ndp; 138 struct proc *p; 139 { 140 struct vnode *devvp; 141 struct iso_args args; 142 size_t size; 143 int error; 144 struct iso_mnt *imp = NULL; 145 146 error = copyin(data, &args, sizeof (struct iso_args)); 147 if (error) 148 return (error); 149 150 if ((mp->mnt_flag & MNT_RDONLY) == 0) 151 return (EROFS); 152 153 /* 154 * If updating, check whether changing from read-only to 155 * read/write; if there is no device name, that's all we do. 156 */ 157 if (mp->mnt_flag & MNT_UPDATE) { 158 imp = VFSTOISOFS(mp); 159 if (args.fspec == 0) 160 return (vfs_export(mp, &imp->im_export, &args.export)); 161 } 162 /* 163 * Not an update, or updating the name: look up the name 164 * and verify that it refers to a sensible block device. 165 */ 166 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 167 if ((error = namei(ndp)) != 0) 168 return (error); 169 devvp = ndp->ni_vp; 170 171 if (devvp->v_type != VBLK) { 172 vrele(devvp); 173 return (ENOTBLK); 174 } 175 if (major(devvp->v_rdev) >= nblkdev) { 176 vrele(devvp); 177 return (ENXIO); 178 } 179 /* 180 * If mount by non-root, then verify that user has necessary 181 * permissions on the device. 182 */ 183 if (p->p_ucred->cr_uid != 0) { 184 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 185 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 186 if (error) { 187 vput(devvp); 188 return (error); 189 } 190 VOP_UNLOCK(devvp, 0, p); 191 } 192 if ((mp->mnt_flag & MNT_UPDATE) == 0) 193 error = iso_mountfs(devvp, mp, p, &args); 194 else { 195 if (devvp != imp->im_devvp) 196 error = EINVAL; /* needs translation */ 197 else 198 vrele(devvp); 199 } 200 if (error) { 201 vrele(devvp); 202 return (error); 203 } 204 imp = VFSTOISOFS(mp); 205 (void)copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 206 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 207 (void)copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 208 &size); 209 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 210 bcopy(&args, &mp->mnt_stat.mount_info.iso_args, sizeof(args)); 211 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 212 return (0); 213 } 214 215 /* 216 * Common code for mount and mountroot 217 */ 218 static int 219 iso_mountfs(devvp, mp, p, argp) 220 register struct vnode *devvp; 221 struct mount *mp; 222 struct proc *p; 223 struct iso_args *argp; 224 { 225 register struct iso_mnt *isomp = (struct iso_mnt *)0; 226 struct buf *bp = NULL; 227 struct buf *pribp = NULL, *supbp = NULL; 228 dev_t dev = devvp->v_rdev; 229 int error = EINVAL; 230 int needclose = 0; 231 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 232 extern struct vnode *rootvp; 233 int iso_bsize; 234 int iso_blknum; 235 int joliet_level; 236 struct iso_volume_descriptor *vdp; 237 struct iso_primary_descriptor *pri = NULL; 238 struct iso_supplementary_descriptor *sup = NULL; 239 struct iso_directory_record *rootp; 240 int logical_block_size; 241 242 if (!ronly) 243 return (EROFS); 244 245 /* 246 * Disallow multiple mounts of the same device. 247 * Disallow mounting of a device that is currently in use 248 * (except for root, which might share swap device for miniroot). 249 * Flush out any old buffers remaining from a previous use. 250 */ 251 if ((error = vfs_mountedon(devvp)) != 0) 252 return (error); 253 if (vcount(devvp) > 1 && devvp != rootvp) 254 return (EBUSY); 255 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 256 return (error); 257 258 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 259 if (error) 260 return (error); 261 needclose = 1; 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 joliet_level = 0; 270 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 271 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 272 iso_bsize, NOCRED, &bp)) != 0) 273 goto out; 274 275 vdp = (struct iso_volume_descriptor *)bp->b_data; 276 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 277 error = EINVAL; 278 goto out; 279 } 280 281 switch (isonum_711 (vdp->type)){ 282 case ISO_VD_PRIMARY: 283 if (pribp == NULL) { 284 pribp = bp; 285 bp = NULL; 286 pri = (struct iso_primary_descriptor *)vdp; 287 } 288 break; 289 case ISO_VD_SUPPLEMENTARY: 290 if (supbp == NULL) { 291 supbp = bp; 292 bp = NULL; 293 sup = (struct iso_supplementary_descriptor *)vdp; 294 295 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 296 if (bcmp(sup->escape, "%/@", 3) == 0) 297 joliet_level = 1; 298 if (bcmp(sup->escape, "%/C", 3) == 0) 299 joliet_level = 2; 300 if (bcmp(sup->escape, "%/E", 3) == 0) 301 joliet_level = 3; 302 303 if (isonum_711 (sup->flags) & 1) 304 joliet_level = 0; 305 } 306 } 307 break; 308 309 case ISO_VD_END: 310 goto vd_end; 311 312 default: 313 break; 314 } 315 if (bp) { 316 brelse(bp); 317 bp = NULL; 318 } 319 } 320 vd_end: 321 if (bp) { 322 brelse(bp); 323 bp = NULL; 324 } 325 326 if (pri == NULL) { 327 error = EINVAL; 328 goto out; 329 } 330 331 logical_block_size = isonum_723 (pri->logical_block_size); 332 333 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 334 || (logical_block_size & (logical_block_size - 1)) != 0) { 335 error = EINVAL; 336 goto out; 337 } 338 339 rootp = (struct iso_directory_record *)pri->root_directory_record; 340 341 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 342 bzero((caddr_t)isomp, sizeof *isomp); 343 isomp->logical_block_size = logical_block_size; 344 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 345 bcopy (rootp, isomp->root, sizeof isomp->root); 346 isomp->root_extent = isonum_733 (rootp->extent); 347 isomp->root_size = isonum_733 (rootp->size); 348 isomp->joliet_level = 0; 349 350 isomp->im_bmask = logical_block_size - 1; 351 isomp->im_bshift = ffs(logical_block_size) - 1; 352 353 pribp->b_flags |= B_AGE; 354 brelse(pribp); 355 pribp = NULL; 356 357 mp->mnt_data = (qaddr_t)isomp; 358 mp->mnt_stat.f_fsid.val[0] = (long)dev; 359 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 360 mp->mnt_maxsymlinklen = 0; 361 mp->mnt_flag |= MNT_LOCAL; 362 isomp->im_mountp = mp; 363 isomp->im_dev = dev; 364 isomp->im_devvp = devvp; 365 366 devvp->v_specmountpoint = mp; 367 368 /* Check the Rock Ridge Extention support */ 369 if (!(argp->flags & ISOFSMNT_NORRIP)) { 370 if ((error = bread(isomp->im_devvp, (isomp->root_extent + 371 isonum_711(rootp->ext_attr_length)) << 372 (isomp->im_bshift - DEV_BSHIFT), 373 isomp->logical_block_size, NOCRED, &bp)) != 0) 374 goto out; 375 376 rootp = (struct iso_directory_record *)bp->b_data; 377 378 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 379 argp->flags |= ISOFSMNT_NORRIP; 380 } else { 381 argp->flags &= ~ISOFSMNT_GENS; 382 } 383 384 /* 385 * The contents are valid, 386 * but they will get reread as part of another vnode, so... 387 */ 388 bp->b_flags |= B_AGE; 389 brelse(bp); 390 bp = NULL; 391 } 392 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 393 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 394 switch (isomp->im_flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS)) { 395 default: 396 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 397 break; 398 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 399 isomp->iso_ftype = ISO_FTYPE_9660; 400 break; 401 case 0: 402 isomp->iso_ftype = ISO_FTYPE_RRIP; 403 break; 404 } 405 406 /* Decide whether to use the Joliet descriptor */ 407 408 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 409 rootp = (struct iso_directory_record *) 410 sup->root_directory_record; 411 bcopy(rootp, isomp->root, sizeof isomp->root); 412 isomp->root_extent = isonum_733(rootp->extent); 413 isomp->root_size = isonum_733(rootp->size); 414 isomp->joliet_level = joliet_level; 415 supbp->b_flags |= B_AGE; 416 } 417 418 if (supbp) { 419 brelse(supbp); 420 supbp = NULL; 421 } 422 423 return (0); 424 out: 425 if (bp) 426 brelse(bp); 427 if (supbp) 428 brelse(supbp); 429 if (needclose) 430 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, 431 p); 432 if (isomp) { 433 free((caddr_t)isomp, M_ISOFSMNT); 434 mp->mnt_data = (qaddr_t)0; 435 } 436 return (error); 437 } 438 439 /* 440 * Test to see if the device is an ISOFS filesystem. 441 */ 442 int 443 iso_disklabelspoof(dev, strat, lp) 444 dev_t dev; 445 void (*strat) __P((struct buf *)); 446 register struct disklabel *lp; 447 { 448 struct buf *bp = NULL; 449 struct iso_volume_descriptor *vdp; 450 struct iso_primary_descriptor *pri; 451 int logical_block_size; 452 int error = EINVAL; 453 int iso_blknum; 454 int i; 455 456 bp = geteblk(ISO_DEFAULT_BLOCK_SIZE); 457 bp->b_dev = dev; 458 459 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 460 bp->b_blkno = iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE); 461 bp->b_bcount = ISO_DEFAULT_BLOCK_SIZE; 462 bp->b_flags = B_BUSY | B_READ; 463 bp->b_cylin = bp->b_blkno / lp->d_secpercyl; 464 465 /*printf("d_secsize %d iso_blknum %d b_blkno %d bcount %d\n", 466 lp->d_secsize, iso_blknum, bp->b_blkno, bp->b_bcount);*/ 467 468 (*strat)(bp); 469 470 if (biowait(bp)) 471 goto out; 472 473 vdp = (struct iso_volume_descriptor *)bp->b_data; 474 /*printf("%2x%2x%2x type %2x\n", vdp->id[0], vdp->id[1], 475 vdp->id[2], isonum_711(vdp->type));*/ 476 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0 || 477 isonum_711 (vdp->type) == ISO_VD_END) 478 goto out; 479 480 if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) 481 break; 482 } 483 484 if (isonum_711 (vdp->type) != ISO_VD_PRIMARY) 485 goto out; 486 487 pri = (struct iso_primary_descriptor *)vdp; 488 logical_block_size = isonum_723 (pri->logical_block_size); 489 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE || 490 (logical_block_size & (logical_block_size - 1)) != 0) 491 goto out; 492 493 /* 494 * build a disklabel for the CD 495 */ 496 strncpy(lp->d_typename, pri->volume_id, 16); 497 strncpy(lp->d_packname, pri->volume_id+16, 16); 498 for (i = 0; i < MAXPARTITIONS; i++) { 499 lp->d_partitions[i].p_size = 0; 500 lp->d_partitions[i].p_offset = 0; 501 } 502 lp->d_partitions[0].p_offset = 0; 503 lp->d_partitions[0].p_size = lp->d_secperunit; 504 lp->d_partitions[0].p_fstype = FS_ISO9660; 505 lp->d_partitions[RAW_PART].p_offset = 0; 506 lp->d_partitions[RAW_PART].p_size = lp->d_secperunit; 507 lp->d_partitions[RAW_PART].p_fstype = FS_ISO9660; 508 lp->d_npartitions = RAW_PART + 1; 509 lp->d_bbsize = 8192; /* fake */ 510 lp->d_sbsize = 64*1024; /* fake */ 511 512 lp->d_magic = DISKMAGIC; 513 lp->d_magic2 = DISKMAGIC; 514 lp->d_checksum = dkcksum(lp); 515 error = 0; 516 out: 517 bp->b_flags |= B_INVAL; 518 brelse(bp); 519 return (error); 520 } 521 522 /* 523 * Make a filesystem operational. 524 * Nothing to do at the moment. 525 */ 526 /* ARGSUSED */ 527 int 528 cd9660_start(mp, flags, p) 529 struct mount *mp; 530 int flags; 531 struct proc *p; 532 { 533 return (0); 534 } 535 536 /* 537 * unmount system call 538 */ 539 int 540 cd9660_unmount(mp, mntflags, p) 541 struct mount *mp; 542 int mntflags; 543 struct proc *p; 544 { 545 register struct iso_mnt *isomp; 546 int error, flags = 0; 547 548 if (mntflags & MNT_FORCE) 549 flags |= FORCECLOSE; 550 #if 0 551 mntflushbuf(mp, 0); 552 if (mntinvalbuf(mp)) 553 return (EBUSY); 554 #endif 555 if ((error = vflush(mp, NULLVP, flags)) != 0) 556 return (error); 557 558 isomp = VFSTOISOFS(mp); 559 560 #ifdef ISODEVMAP 561 if (isomp->iso_ftype == ISO_FTYPE_RRIP) 562 iso_dunmap(isomp->im_dev); 563 #endif 564 565 isomp->im_devvp->v_specmountpoint = NULL; 566 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 567 vrele(isomp->im_devvp); 568 free((caddr_t)isomp, M_ISOFSMNT); 569 mp->mnt_data = (qaddr_t)0; 570 mp->mnt_flag &= ~MNT_LOCAL; 571 return (error); 572 } 573 574 /* 575 * Return root of a filesystem 576 */ 577 int 578 cd9660_root(mp, vpp) 579 struct mount *mp; 580 struct vnode **vpp; 581 { 582 struct iso_mnt *imp = VFSTOISOFS(mp); 583 struct iso_directory_record *dp = 584 (struct iso_directory_record *)imp->root; 585 ino_t ino = isodirino(dp, imp); 586 587 /* 588 * With RRIP we must use the `.' entry of the root directory. 589 * Simply tell vget, that it's a relocated directory. 590 */ 591 return (cd9660_vget_internal(mp, ino, vpp, 592 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 593 } 594 595 /* 596 * Do operations associated with quotas, not supported 597 */ 598 /* ARGSUSED */ 599 int 600 cd9660_quotactl(mp, cmd, uid, arg, p) 601 struct mount *mp; 602 int cmd; 603 uid_t uid; 604 caddr_t arg; 605 struct proc *p; 606 { 607 608 return (EOPNOTSUPP); 609 } 610 611 /* 612 * Get file system statistics. 613 */ 614 int 615 cd9660_statfs(mp, sbp, p) 616 struct mount *mp; 617 register struct statfs *sbp; 618 struct proc *p; 619 { 620 register struct iso_mnt *isomp; 621 622 isomp = VFSTOISOFS(mp); 623 624 sbp->f_bsize = isomp->logical_block_size; 625 sbp->f_iosize = sbp->f_bsize; /* XXX */ 626 sbp->f_blocks = isomp->volume_space_size; 627 sbp->f_bfree = 0; /* total free blocks */ 628 sbp->f_bavail = 0; /* blocks free for non superuser */ 629 sbp->f_files = 0; /* total files */ 630 sbp->f_ffree = 0; /* free file nodes */ 631 if (sbp != &mp->mnt_stat) { 632 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 633 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, 634 MNAMELEN); 635 bcopy(&mp->mnt_stat.mount_info.iso_args, 636 &sbp->mount_info.iso_args, sizeof(struct iso_args)); 637 } 638 /* Use the first spare for flags: */ 639 sbp->f_spare[0] = isomp->im_flags; 640 return (0); 641 } 642 643 /* ARGSUSED */ 644 int 645 cd9660_sync(mp, waitfor, cred, p) 646 struct mount *mp; 647 int waitfor; 648 struct ucred *cred; 649 struct proc *p; 650 { 651 return (0); 652 } 653 654 /* 655 * File handle to vnode 656 * 657 * Have to be really careful about stale file handles: 658 * - check that the inode number is in range 659 * - call iget() to get the locked inode 660 * - check for an unallocated inode (i_mode == 0) 661 * - check that the generation number matches 662 */ 663 664 struct ifid { 665 ushort ifid_len; 666 ushort ifid_pad; 667 int ifid_ino; 668 long ifid_start; 669 }; 670 671 /* ARGSUSED */ 672 int 673 cd9660_fhtovp(mp, fhp, vpp) 674 register struct mount *mp; 675 struct fid *fhp; 676 struct vnode **vpp; 677 { 678 struct ifid *ifhp = (struct ifid *)fhp; 679 register struct iso_node *ip; 680 struct vnode *nvp; 681 int error; 682 683 #ifdef ISOFS_DBG 684 printf("fhtovp: ino %d, start %ld\n", ifhp->ifid_ino, 685 ifhp->ifid_start); 686 #endif 687 688 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 689 *vpp = NULLVP; 690 return (error); 691 } 692 ip = VTOI(nvp); 693 if (ip->inode.iso_mode == 0) { 694 vput(nvp); 695 *vpp = NULLVP; 696 return (ESTALE); 697 } 698 *vpp = nvp; 699 return (0); 700 } 701 702 int 703 cd9660_vget(mp, ino, vpp) 704 struct mount *mp; 705 ino_t ino; 706 struct vnode **vpp; 707 { 708 709 /* 710 * XXXX 711 * It would be nice if we didn't always set the `relocated' flag 712 * and force the extra read, but I don't want to think about fixing 713 * that right now. 714 */ 715 return (cd9660_vget_internal(mp, ino, vpp, 716 #if 0 717 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 718 #else 719 0, 720 #endif 721 NULL)); 722 } 723 724 int 725 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 726 struct mount *mp; 727 ino_t ino; 728 struct vnode **vpp; 729 int relocated; 730 struct iso_directory_record *isodir; 731 { 732 register struct iso_mnt *imp; 733 struct iso_node *ip; 734 struct buf *bp; 735 struct vnode *vp, *nvp; 736 dev_t dev; 737 int error; 738 739 retry: 740 imp = VFSTOISOFS(mp); 741 dev = imp->im_dev; 742 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 743 return (0); 744 745 /* Allocate a new vnode/iso_node. */ 746 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 747 *vpp = NULLVP; 748 return (error); 749 } 750 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 751 M_WAITOK); 752 bzero((caddr_t)ip, sizeof(struct iso_node)); 753 lockinit(&ip->i_lock, PINOD, "isoinode", 0, 0); 754 vp->v_data = ip; 755 ip->i_vnode = vp; 756 ip->i_dev = dev; 757 ip->i_number = ino; 758 759 /* 760 * Put it onto its hash chain and lock it so that other requests for 761 * this inode will block if they arrive while we are sleeping waiting 762 * for old data structures to be purged or for the contents of the 763 * disk portion of this inode to be read. 764 */ 765 error = cd9660_ihashins(ip); 766 767 if (error) { 768 vrele(vp); 769 770 if (error == EEXIST) 771 goto retry; 772 773 return (error); 774 } 775 776 if (isodir == 0) { 777 int lbn, off; 778 779 lbn = lblkno(imp, ino); 780 if (lbn >= imp->volume_space_size) { 781 vput(vp); 782 printf("fhtovp: lbn exceed volume space %d\n", lbn); 783 return (ESTALE); 784 } 785 786 off = blkoff(imp, ino); 787 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) 788 { 789 vput(vp); 790 printf("fhtovp: crosses block boundary %d\n", 791 off + ISO_DIRECTORY_RECORD_SIZE); 792 return (ESTALE); 793 } 794 795 error = bread(imp->im_devvp, 796 lbn << (imp->im_bshift - DEV_BSHIFT), 797 imp->logical_block_size, NOCRED, &bp); 798 if (error) { 799 vput(vp); 800 brelse(bp); 801 printf("fhtovp: bread error %d\n",error); 802 return (error); 803 } 804 isodir = (struct iso_directory_record *)(bp->b_data + off); 805 806 if (off + isonum_711(isodir->length) > 807 imp->logical_block_size) { 808 vput(vp); 809 if (bp != 0) 810 brelse(bp); 811 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 812 off +isonum_711(isodir->length), off, 813 isonum_711(isodir->length)); 814 return (ESTALE); 815 } 816 817 #if 0 818 if (isonum_733(isodir->extent) + 819 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 820 if (bp != 0) 821 brelse(bp); 822 printf("fhtovp: file start miss %d vs %d\n", 823 isonum_733(isodir->extent) + 824 isonum_711(isodir->ext_attr_length), 825 ifhp->ifid_start); 826 return (ESTALE); 827 } 828 #endif 829 } else 830 bp = 0; 831 832 ip->i_mnt = imp; 833 ip->i_devvp = imp->im_devvp; 834 VREF(ip->i_devvp); 835 836 if (relocated) { 837 /* 838 * On relocated directories we must 839 * read the `.' entry out of a dir. 840 */ 841 ip->iso_start = ino >> imp->im_bshift; 842 if (bp != 0) 843 brelse(bp); 844 if ((error = cd9660_bufatoff(ip, (off_t)0, NULL, &bp)) != 0) { 845 vput(vp); 846 return (error); 847 } 848 isodir = (struct iso_directory_record *)bp->b_data; 849 } 850 851 ip->iso_extent = isonum_733(isodir->extent); 852 ip->i_size = isonum_733(isodir->size); 853 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 854 855 /* 856 * Setup time stamp, attribute 857 */ 858 vp->v_type = VNON; 859 switch (imp->iso_ftype) { 860 default: /* ISO_FTYPE_9660 */ 861 { 862 struct buf *bp2; 863 int off; 864 if ((imp->im_flags & ISOFSMNT_EXTATT) && 865 (off = isonum_711(isodir->ext_attr_length))) 866 cd9660_bufatoff(ip, (off_t)-(off << imp->im_bshift), 867 NULL, &bp2); 868 else 869 bp2 = NULL; 870 cd9660_defattr(isodir, ip, bp2); 871 cd9660_deftstamp(isodir, ip, bp2); 872 if (bp2) 873 brelse(bp2); 874 break; 875 } 876 case ISO_FTYPE_RRIP: 877 cd9660_rrip_analyze(isodir, ip, imp); 878 break; 879 } 880 881 if (bp != 0) 882 brelse(bp); 883 884 /* 885 * Initialize the associated vnode 886 */ 887 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 888 case VFIFO: 889 #ifdef FIFO 890 vp->v_op = cd9660_fifoop_p; 891 break; 892 #else 893 vput(vp); 894 return (EOPNOTSUPP); 895 #endif /* FIFO */ 896 case VCHR: 897 case VBLK: 898 /* 899 * if device, look at device number table for translation 900 */ 901 #ifdef ISODEVMAP 902 if (dp = iso_dmap(dev, ino, 0)) 903 ip->inode.iso_rdev = dp->d_dev; 904 #endif 905 vp->v_op = cd9660_specop_p; 906 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 907 /* 908 * Discard unneeded vnode, but save its iso_node. 909 * Note that the lock is carried over in the iso_node 910 */ 911 nvp->v_data = vp->v_data; 912 vp->v_data = NULL; 913 vp->v_op = spec_vnodeop_p; 914 vrele(vp); 915 vgone(vp); 916 /* 917 * Reinitialize aliased inode. 918 */ 919 vp = nvp; 920 ip->i_vnode = vp; 921 } 922 break; 923 case VLNK: 924 case VNON: 925 case VSOCK: 926 case VDIR: 927 case VBAD: 928 break; 929 case VREG: 930 uvm_vnp_setsize(vp, ip->i_size); 931 break; 932 } 933 934 if (ip->iso_extent == imp->root_extent) 935 vp->v_flag |= VROOT; 936 937 /* 938 * XXX need generation number? 939 */ 940 941 *vpp = vp; 942 return (0); 943 } 944 945 /* 946 * Vnode pointer to File handle 947 */ 948 /* ARGSUSED */ 949 int 950 cd9660_vptofh(vp, fhp) 951 struct vnode *vp; 952 struct fid *fhp; 953 { 954 register struct iso_node *ip = VTOI(vp); 955 register struct ifid *ifhp; 956 957 ifhp = (struct ifid *)fhp; 958 ifhp->ifid_len = sizeof(struct ifid); 959 960 ifhp->ifid_ino = ip->i_number; 961 ifhp->ifid_start = ip->iso_start; 962 963 #ifdef ISOFS_DBG 964 printf("vptofh: ino %d, start %ld\n", 965 ifhp->ifid_ino,ifhp->ifid_start); 966 #endif 967 return (0); 968 } 969 970 /* 971 * Verify a remote client has export rights and return these rights via 972 * exflagsp and credanonp. 973 */ 974 int 975 cd9660_check_export(mp, nam, exflagsp, credanonp) 976 register struct mount *mp; 977 struct mbuf *nam; 978 int *exflagsp; 979 struct ucred **credanonp; 980 { 981 register struct netcred *np; 982 register struct iso_mnt *imp = VFSTOISOFS(mp); 983 984 /* 985 * Get the export permission structure for this <mp, client> tuple. 986 */ 987 np = vfs_export_lookup(mp, &imp->im_export, nam); 988 if (np == NULL) 989 return (EACCES); 990 991 *exflagsp = np->netc_exflags; 992 *credanonp = &np->netc_anon; 993 return (0); 994 } 995