1 /* $OpenBSD: cd9660_vfsops.c,v 1.98 2023/07/17 09:41:20 semarie Exp $ */ 2 /* $NetBSD: cd9660_vfsops.c,v 1.26 1997/06/13 15:38:58 pk Exp $ */ 3 4 /*- 5 * Copyright (c) 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley 9 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 10 * Support code is derived from software contributed to Berkeley 11 * by Atsushi Murai (amurai@spec.co.jp). 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)cd9660_vfsops.c 8.9 (Berkeley) 12/5/94 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/proc.h> 44 #include <sys/kernel.h> 45 #include <sys/vnode.h> 46 #include <sys/lock.h> 47 #include <sys/specdev.h> 48 #include <sys/mount.h> 49 #include <sys/buf.h> 50 #include <sys/fcntl.h> 51 #include <sys/disklabel.h> 52 #include <sys/ioctl.h> 53 #include <sys/cdio.h> 54 #include <sys/errno.h> 55 #include <sys/malloc.h> 56 #include <sys/stat.h> 57 58 #include <isofs/cd9660/iso.h> 59 #include <isofs/cd9660/cd9660_extern.h> 60 #include <isofs/cd9660/iso_rrip.h> 61 #include <isofs/cd9660/cd9660_node.h> 62 63 const struct vfsops cd9660_vfsops = { 64 .vfs_mount = cd9660_mount, 65 .vfs_start = cd9660_start, 66 .vfs_unmount = cd9660_unmount, 67 .vfs_root = cd9660_root, 68 .vfs_quotactl = cd9660_quotactl, 69 .vfs_statfs = cd9660_statfs, 70 .vfs_sync = cd9660_sync, 71 .vfs_vget = cd9660_vget, 72 .vfs_fhtovp = cd9660_fhtovp, 73 .vfs_vptofh = cd9660_vptofh, 74 .vfs_init = cd9660_init, 75 .vfs_sysctl = (void *)eopnotsupp, 76 .vfs_checkexp = cd9660_check_export, 77 }; 78 79 /* 80 * Called by vfs_mountroot when iso is going to be mounted as root. 81 */ 82 83 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 84 struct proc *p, struct iso_args *argp); 85 int iso_disklabelspoof(dev_t dev, void (*strat)(struct buf *), 86 struct disklabel *lp); 87 88 int 89 cd9660_mountroot(void) 90 { 91 struct mount *mp; 92 extern struct vnode *rootvp; 93 struct proc *p = curproc; /* XXX */ 94 int error; 95 struct iso_args args; 96 97 /* 98 * Get vnodes for swapdev and rootdev. 99 */ 100 if ((error = bdevvp(swapdev, &swapdev_vp)) || 101 (error = bdevvp(rootdev, &rootvp))) { 102 printf("cd9660_mountroot: can't setup bdevvp's"); 103 return (error); 104 } 105 106 if ((error = vfs_rootmountalloc("cd9660", "root_device", &mp)) != 0) 107 return (error); 108 args.flags = ISOFSMNT_ROOT; 109 if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) { 110 vfs_unbusy(mp); 111 vfs_mount_free(mp); 112 return (error); 113 } 114 115 TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list); 116 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 117 vfs_unbusy(mp); 118 inittodr(0); 119 120 return (0); 121 } 122 123 /* 124 * VFS Operations. 125 * 126 * mount system call 127 */ 128 int 129 cd9660_mount(struct mount *mp, const char *path, void *data, 130 struct nameidata *ndp, struct proc *p) 131 { 132 struct iso_mnt *imp = NULL; 133 struct iso_args *args = data; 134 struct vnode *devvp; 135 char fspec[MNAMELEN]; 136 int error; 137 138 if ((mp->mnt_flag & MNT_RDONLY) == 0) 139 return (EROFS); 140 141 /* 142 * If updating, check whether changing from read-only to 143 * read/write; if there is no device name, that's all we do. 144 */ 145 if (mp->mnt_flag & MNT_UPDATE) { 146 imp = VFSTOISOFS(mp); 147 if (args && args->fspec == NULL) 148 return (vfs_export(mp, &imp->im_export, 149 &args->export_info)); 150 return (0); 151 } 152 153 /* 154 * Not an update, or updating the name: look up the name 155 * and verify that it refers to a sensible block device. 156 */ 157 error = copyinstr(args->fspec, fspec, sizeof(fspec), NULL); 158 if (error) 159 return (error); 160 NDINIT(ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, p); 161 if ((error = namei(ndp)) != 0) 162 return (error); 163 devvp = ndp->ni_vp; 164 165 if (devvp->v_type != VBLK) { 166 vrele(devvp); 167 return (ENOTBLK); 168 } 169 if (major(devvp->v_rdev) >= nblkdev) { 170 vrele(devvp); 171 return (ENXIO); 172 } 173 174 if ((mp->mnt_flag & MNT_UPDATE) == 0) 175 error = iso_mountfs(devvp, mp, p, args); 176 else { 177 if (devvp != imp->im_devvp) 178 error = EINVAL; /* needs translation */ 179 else 180 vrele(devvp); 181 } 182 if (error) { 183 vrele(devvp); 184 return (error); 185 } 186 187 bzero(mp->mnt_stat.f_mntonname, MNAMELEN); 188 strlcpy(mp->mnt_stat.f_mntonname, path, MNAMELEN); 189 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN); 190 strlcpy(mp->mnt_stat.f_mntfromname, fspec, MNAMELEN); 191 bzero(mp->mnt_stat.f_mntfromspec, MNAMELEN); 192 strlcpy(mp->mnt_stat.f_mntfromspec, fspec, MNAMELEN); 193 bcopy(args, &mp->mnt_stat.mount_info.iso_args, sizeof(*args)); 194 195 cd9660_statfs(mp, &mp->mnt_stat, p); 196 197 return (0); 198 } 199 200 /* 201 * Common code for mount and mountroot 202 */ 203 static int 204 iso_mountfs(struct vnode *devvp, struct mount *mp, struct proc *p, 205 struct iso_args *argp) 206 { 207 struct iso_mnt *isomp = NULL; 208 struct buf *bp = NULL; 209 struct buf *pribp = NULL, *supbp = NULL; 210 dev_t dev = devvp->v_rdev; 211 int error = EINVAL; 212 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 213 extern struct vnode *rootvp; 214 int iso_bsize; 215 int iso_blknum; 216 int joliet_level; 217 struct iso_volume_descriptor *vdp; 218 struct iso_primary_descriptor *pri = NULL; 219 struct iso_supplementary_descriptor *sup = NULL; 220 struct iso_directory_record *rootp; 221 int logical_block_size; 222 int sess; 223 224 if (!ronly) 225 return (EROFS); 226 227 /* 228 * Disallow multiple mounts of the same device. 229 * Disallow mounting of a device that is currently in use 230 * (except for root, which might share swap device for miniroot). 231 * Flush out any old buffers remaining from a previous use. 232 */ 233 if ((error = vfs_mountedon(devvp)) != 0) 234 return (error); 235 if (vcount(devvp) > 1 && devvp != rootvp) 236 return (EBUSY); 237 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 238 error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, INFSLP); 239 VOP_UNLOCK(devvp); 240 if (error) 241 return (error); 242 243 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 244 if (error) 245 return (error); 246 247 /* 248 * This is the "logical sector size". The standard says this 249 * should be 2048 or the physical sector size on the device, 250 * whichever is greater. For now, we'll just use a constant. 251 */ 252 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 253 254 if (argp->flags & ISOFSMNT_SESS) { 255 sess = argp->sess; 256 if (sess < 0) 257 sess = 0; 258 } else { 259 sess = 0; 260 error = VOP_IOCTL(devvp, CDIOREADMSADDR, (caddr_t)&sess, 0, 261 FSCRED, p); 262 if (error) 263 sess = 0; 264 } 265 266 joliet_level = 0; 267 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 268 if ((error = bread(devvp, 269 (iso_blknum + sess) * btodb(iso_bsize), 270 iso_bsize, &bp)) != 0) 271 goto out; 272 273 vdp = (struct iso_volume_descriptor *)bp->b_data; 274 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 275 error = EINVAL; 276 goto out; 277 } 278 279 switch (isonum_711 (vdp->type)){ 280 case ISO_VD_PRIMARY: 281 if (pribp == NULL) { 282 pribp = bp; 283 bp = NULL; 284 pri = (struct iso_primary_descriptor *)vdp; 285 } 286 break; 287 case ISO_VD_SUPPLEMENTARY: 288 if (supbp == NULL) { 289 supbp = bp; 290 bp = NULL; 291 sup = (struct iso_supplementary_descriptor *)vdp; 292 293 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 294 if (bcmp(sup->escape, "%/@", 3) == 0) 295 joliet_level = 1; 296 if (bcmp(sup->escape, "%/C", 3) == 0) 297 joliet_level = 2; 298 if (bcmp(sup->escape, "%/E", 3) == 0) 299 joliet_level = 3; 300 301 if (isonum_711 (sup->flags) & 1) 302 joliet_level = 0; 303 } 304 } 305 break; 306 307 case ISO_VD_END: 308 goto vd_end; 309 310 default: 311 break; 312 } 313 if (bp) { 314 brelse(bp); 315 bp = NULL; 316 } 317 } 318 vd_end: 319 if (bp) { 320 brelse(bp); 321 bp = NULL; 322 } 323 324 if (pri == NULL) { 325 error = EINVAL; 326 goto out; 327 } 328 329 logical_block_size = isonum_723 (pri->logical_block_size); 330 331 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 332 || (logical_block_size & (logical_block_size - 1)) != 0) { 333 error = EINVAL; 334 goto out; 335 } 336 337 rootp = (struct iso_directory_record *)pri->root_directory_record; 338 339 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 340 bzero((caddr_t)isomp, sizeof *isomp); 341 isomp->logical_block_size = logical_block_size; 342 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 343 bcopy (rootp, isomp->root, sizeof isomp->root); 344 isomp->root_extent = isonum_733 (rootp->extent); 345 isomp->root_size = isonum_733 (rootp->size); 346 isomp->joliet_level = 0; 347 /* 348 * Since an ISO9660 multi-session CD can also access previous sessions, 349 * we have to include them into the space considerations. 350 */ 351 isomp->volume_space_size += sess; 352 isomp->im_bmask = logical_block_size - 1; 353 isomp->im_bshift = ffs(logical_block_size) - 1; 354 355 brelse(pribp); 356 pribp = NULL; 357 358 mp->mnt_data = 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_stat.f_namemax = NAME_MAX; 362 mp->mnt_flag |= MNT_LOCAL; 363 isomp->im_mountp = mp; 364 isomp->im_dev = dev; 365 isomp->im_devvp = devvp; 366 367 /* Check the Rock Ridge Extension support */ 368 if (!(argp->flags & ISOFSMNT_NORRIP)) { 369 if ((error = bread(isomp->im_devvp, (isomp->root_extent + 370 isonum_711(rootp->ext_attr_length)) << 371 (isomp->im_bshift - DEV_BSHIFT), 372 isomp->logical_block_size, &bp)) != 0) 373 goto out; 374 375 rootp = (struct iso_directory_record *)bp->b_data; 376 377 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 378 argp->flags |= ISOFSMNT_NORRIP; 379 } else { 380 argp->flags &= ~ISOFSMNT_GENS; 381 } 382 383 /* 384 * The contents are valid, 385 * but they will get reread as part of another vnode, so... 386 */ 387 brelse(bp); 388 bp = NULL; 389 } 390 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 391 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 392 switch (isomp->im_flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS)) { 393 default: 394 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 395 break; 396 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 397 isomp->iso_ftype = ISO_FTYPE_9660; 398 break; 399 case 0: 400 isomp->iso_ftype = ISO_FTYPE_RRIP; 401 break; 402 } 403 404 /* Decide whether to use the Joliet descriptor */ 405 406 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 407 rootp = (struct iso_directory_record *) 408 sup->root_directory_record; 409 bcopy(rootp, isomp->root, sizeof isomp->root); 410 isomp->root_extent = isonum_733(rootp->extent); 411 isomp->root_size = isonum_733(rootp->size); 412 isomp->joliet_level = joliet_level; 413 } 414 415 if (supbp) { 416 brelse(supbp); 417 supbp = NULL; 418 } 419 420 devvp->v_specmountpoint = mp; 421 422 return (0); 423 out: 424 if (devvp->v_specinfo) 425 devvp->v_specmountpoint = NULL; 426 if (bp) 427 brelse(bp); 428 if (supbp) 429 brelse(supbp); 430 431 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 432 VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 433 VOP_UNLOCK(devvp); 434 435 if (isomp) { 436 free((caddr_t)isomp, M_ISOFSMNT, 0); 437 mp->mnt_data = NULL; 438 } 439 return (error); 440 } 441 442 /* 443 * Test to see if the device is an ISOFS filesystem. 444 */ 445 int 446 iso_disklabelspoof(dev_t dev, void (*strat)(struct buf *), 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 CLR(bp->b_flags, B_READ | B_WRITE | B_DONE); 463 SET(bp->b_flags, B_BUSY | B_READ | B_RAW); 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, sizeof lp->d_typename); 497 strncpy(lp->d_packname, pri->volume_id+16, sizeof lp->d_packname); 498 for (i = 0; i < MAXPARTITIONS; i++) { 499 DL_SETPSIZE(&lp->d_partitions[i], 0); 500 DL_SETPOFFSET(&lp->d_partitions[i], 0); 501 } 502 DL_SETPOFFSET(&lp->d_partitions[0], 0); 503 DL_SETPSIZE(&lp->d_partitions[0], DL_GETDSIZE(lp)); 504 lp->d_partitions[0].p_fstype = FS_ISO9660; 505 DL_SETPOFFSET(&lp->d_partitions[RAW_PART], 0); 506 DL_SETPSIZE(&lp->d_partitions[RAW_PART], DL_GETDSIZE(lp)); 507 lp->d_partitions[RAW_PART].p_fstype = FS_ISO9660; 508 lp->d_npartitions = MAXPARTITIONS; 509 lp->d_version = 1; 510 511 lp->d_magic = DISKMAGIC; 512 lp->d_magic2 = DISKMAGIC; 513 lp->d_checksum = dkcksum(lp); 514 error = 0; 515 out: 516 bp->b_flags |= B_INVAL; 517 brelse(bp); 518 return (error); 519 } 520 521 /* 522 * Make a filesystem operational. 523 * Nothing to do at the moment. 524 */ 525 int 526 cd9660_start(struct mount *mp, int flags, struct proc *p) 527 { 528 return (0); 529 } 530 531 /* 532 * unmount system call 533 */ 534 int 535 cd9660_unmount(struct mount *mp, int mntflags, struct proc *p) 536 { 537 struct iso_mnt *isomp; 538 int error, flags = 0; 539 540 if (mntflags & MNT_FORCE) 541 flags |= FORCECLOSE; 542 #if 0 543 mntflushbuf(mp, 0); 544 if (mntinvalbuf(mp)) 545 return (EBUSY); 546 #endif 547 if ((error = vflush(mp, NULLVP, flags)) != 0) 548 return (error); 549 550 isomp = VFSTOISOFS(mp); 551 552 isomp->im_devvp->v_specmountpoint = NULL; 553 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 554 (void)VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 555 vput(isomp->im_devvp); 556 free((caddr_t)isomp, M_ISOFSMNT, 0); 557 mp->mnt_data = NULL; 558 mp->mnt_flag &= ~MNT_LOCAL; 559 return (0); 560 } 561 562 /* 563 * Return root of a filesystem 564 */ 565 int 566 cd9660_root(struct mount *mp, struct vnode **vpp) 567 { 568 struct iso_mnt *imp = VFSTOISOFS(mp); 569 struct iso_directory_record *dp = 570 (struct iso_directory_record *)imp->root; 571 cdino_t ino = isodirino(dp, imp); 572 573 /* 574 * With RRIP we must use the `.' entry of the root directory. 575 * Simply tell vget, that it's a relocated directory. 576 */ 577 return (cd9660_vget_internal(mp, ino, vpp, 578 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 579 } 580 581 /* 582 * Do operations associated with quotas, not supported 583 */ 584 int 585 cd9660_quotactl(struct mount *mp, int cmd, uid_t uid, caddr_t arg, 586 struct proc *p) 587 { 588 589 return (EOPNOTSUPP); 590 } 591 592 /* 593 * Get file system statistics. 594 */ 595 int 596 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct proc *p) 597 { 598 struct iso_mnt *isomp; 599 600 isomp = VFSTOISOFS(mp); 601 602 sbp->f_bsize = isomp->logical_block_size; 603 sbp->f_iosize = sbp->f_bsize; /* XXX */ 604 sbp->f_blocks = isomp->volume_space_size; 605 sbp->f_bfree = 0; /* total free blocks */ 606 sbp->f_bavail = 0; /* blocks free for non superuser */ 607 sbp->f_files = 0; /* total files */ 608 sbp->f_ffree = 0; /* free file nodes */ 609 sbp->f_favail = 0; /* file nodes free for non superuser */ 610 copy_statfs_info(sbp, mp); 611 612 return (0); 613 } 614 615 int 616 cd9660_sync(struct mount *mp, int waitfor, int stall, struct ucred *cred, 617 struct proc *p) 618 { 619 return (0); 620 } 621 622 /* 623 * File handle to vnode 624 * 625 * Have to be really careful about stale file handles: 626 * - check that the inode number is in range 627 * - call iget() to get the locked inode 628 * - check for an unallocated inode (i_mode == 0) 629 * - check that the generation number matches 630 */ 631 632 struct ifid { 633 ushort ifid_len; 634 ushort ifid_pad; 635 int ifid_ino; 636 long ifid_start; 637 }; 638 639 int 640 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 641 { 642 struct ifid *ifhp = (struct ifid *)fhp; 643 struct iso_node *ip; 644 struct vnode *nvp; 645 int error; 646 647 #ifdef ISOFS_DBG 648 printf("fhtovp: ino %d, start %ld\n", ifhp->ifid_ino, 649 ifhp->ifid_start); 650 #endif 651 652 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 653 *vpp = NULLVP; 654 return (error); 655 } 656 ip = VTOI(nvp); 657 if (ip->inode.iso_mode == 0) { 658 vput(nvp); 659 *vpp = NULLVP; 660 return (ESTALE); 661 } 662 *vpp = nvp; 663 return (0); 664 } 665 666 int 667 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 668 { 669 670 if (ino > (cdino_t)-1) 671 panic("cd9660_vget: alien ino_t %llu", 672 (unsigned long long)ino); 673 674 /* 675 * XXXX 676 * It would be nice if we didn't always set the `relocated' flag 677 * and force the extra read, but I don't want to think about fixing 678 * that right now. 679 */ 680 return (cd9660_vget_internal(mp, ino, vpp, 681 #if 0 682 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 683 #else 684 0, 685 #endif 686 NULL)); 687 } 688 689 int 690 cd9660_vget_internal(struct mount *mp, cdino_t ino, struct vnode **vpp, 691 int relocated, struct iso_directory_record *isodir) 692 { 693 struct iso_mnt *imp; 694 struct iso_node *ip; 695 struct buf *bp; 696 struct vnode *vp, *nvp; 697 dev_t dev; 698 int error; 699 700 retry: 701 imp = VFSTOISOFS(mp); 702 dev = imp->im_dev; 703 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 704 return (0); 705 706 /* Allocate a new vnode/iso_node. */ 707 if ((error = getnewvnode(VT_ISOFS, mp, &cd9660_vops, &vp)) != 0) { 708 *vpp = NULLVP; 709 return (error); 710 } 711 ip = malloc(sizeof(*ip), M_ISOFSNODE, M_WAITOK | M_ZERO); 712 rrw_init_flags(&ip->i_lock, "isoinode", RWL_DUPOK | RWL_IS_VNODE); 713 vp->v_data = ip; 714 ip->i_vnode = vp; 715 ip->i_dev = dev; 716 ip->i_number = ino; 717 718 /* 719 * Put it onto its hash chain and lock it so that other requests for 720 * this inode will block if they arrive while we are sleeping waiting 721 * for old data structures to be purged or for the contents of the 722 * disk portion of this inode to be read. 723 */ 724 error = cd9660_ihashins(ip); 725 726 if (error) { 727 vrele(vp); 728 729 if (error == EEXIST) 730 goto retry; 731 732 return (error); 733 } 734 735 if (isodir == 0) { 736 int lbn, off; 737 738 lbn = lblkno(imp, ino); 739 if (lbn >= imp->volume_space_size) { 740 vput(vp); 741 printf("fhtovp: lbn exceed volume space %d\n", lbn); 742 return (ESTALE); 743 } 744 745 off = blkoff(imp, ino); 746 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) 747 { 748 vput(vp); 749 printf("fhtovp: crosses block boundary %d\n", 750 off + ISO_DIRECTORY_RECORD_SIZE); 751 return (ESTALE); 752 } 753 754 error = bread(imp->im_devvp, 755 lbn << (imp->im_bshift - DEV_BSHIFT), 756 imp->logical_block_size, &bp); 757 if (error) { 758 vput(vp); 759 brelse(bp); 760 printf("fhtovp: bread error %d\n",error); 761 return (error); 762 } 763 isodir = (struct iso_directory_record *)(bp->b_data + off); 764 765 if (off + isonum_711(isodir->length) > 766 imp->logical_block_size) { 767 vput(vp); 768 if (bp != 0) 769 brelse(bp); 770 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 771 off +isonum_711(isodir->length), off, 772 isonum_711(isodir->length)); 773 return (ESTALE); 774 } 775 776 #if 0 777 if (isonum_733(isodir->extent) + 778 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 779 if (bp != 0) 780 brelse(bp); 781 printf("fhtovp: file start miss %d vs %d\n", 782 isonum_733(isodir->extent) + 783 isonum_711(isodir->ext_attr_length), 784 ifhp->ifid_start); 785 return (ESTALE); 786 } 787 #endif 788 } else 789 bp = 0; 790 791 ip->i_mnt = imp; 792 ip->i_devvp = imp->im_devvp; 793 vref(ip->i_devvp); 794 795 if (relocated) { 796 /* 797 * On relocated directories we must 798 * read the `.' entry out of a dir. 799 */ 800 ip->iso_start = ino >> imp->im_bshift; 801 if (bp != 0) 802 brelse(bp); 803 if ((error = cd9660_bufatoff(ip, (off_t)0, NULL, &bp)) != 0) { 804 vput(vp); 805 return (error); 806 } 807 isodir = (struct iso_directory_record *)bp->b_data; 808 } 809 810 ip->iso_extent = isonum_733(isodir->extent); 811 ip->i_size = (u_int32_t) isonum_733(isodir->size); 812 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 813 814 /* 815 * Setup time stamp, attribute 816 */ 817 vp->v_type = VNON; 818 switch (imp->iso_ftype) { 819 default: /* ISO_FTYPE_9660 */ 820 { 821 struct buf *bp2; 822 int off; 823 if ((imp->im_flags & ISOFSMNT_EXTATT) && 824 (off = isonum_711(isodir->ext_attr_length))) 825 cd9660_bufatoff(ip, (off_t)-(off << imp->im_bshift), 826 NULL, &bp2); 827 else 828 bp2 = NULL; 829 cd9660_defattr(isodir, ip, bp2); 830 cd9660_deftstamp(isodir, ip, bp2); 831 if (bp2) 832 brelse(bp2); 833 break; 834 } 835 case ISO_FTYPE_RRIP: 836 cd9660_rrip_analyze(isodir, ip, imp); 837 break; 838 } 839 840 if (bp != 0) 841 brelse(bp); 842 843 /* 844 * Initialize the associated vnode 845 */ 846 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 847 case VFIFO: 848 #ifdef FIFO 849 vp->v_op = &cd9660_fifovops; 850 break; 851 #else 852 vput(vp); 853 return (EOPNOTSUPP); 854 #endif /* FIFO */ 855 case VCHR: 856 case VBLK: 857 /* 858 * if device, look at device number table for translation 859 */ 860 vp->v_op = &cd9660_specvops; 861 if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) { 862 /* 863 * Discard unneeded vnode, but save its iso_node. 864 * Note that the lock is carried over in the iso_node 865 */ 866 nvp->v_data = vp->v_data; 867 vp->v_data = NULL; 868 vp->v_op = &spec_vops; 869 vrele(vp); 870 vgone(vp); 871 /* 872 * Reinitialize aliased inode. 873 */ 874 vp = nvp; 875 ip->i_vnode = vp; 876 } 877 break; 878 case VLNK: 879 case VNON: 880 case VSOCK: 881 case VDIR: 882 case VBAD: 883 break; 884 case VREG: 885 uvm_vnp_setsize(vp, ip->i_size); 886 break; 887 } 888 889 if (ip->iso_extent == imp->root_extent) 890 vp->v_flag |= VROOT; 891 892 /* 893 * XXX need generation number? 894 */ 895 896 *vpp = vp; 897 return (0); 898 } 899 900 /* 901 * Vnode pointer to File handle 902 */ 903 int 904 cd9660_vptofh(struct vnode *vp, struct fid *fhp) 905 { 906 struct iso_node *ip = VTOI(vp); 907 struct ifid *ifhp; 908 909 ifhp = (struct ifid *)fhp; 910 ifhp->ifid_len = sizeof(struct ifid); 911 912 ifhp->ifid_ino = ip->i_number; 913 ifhp->ifid_start = ip->iso_start; 914 915 #ifdef ISOFS_DBG 916 printf("vptofh: ino %d, start %ld\n", 917 ifhp->ifid_ino,ifhp->ifid_start); 918 #endif 919 return (0); 920 } 921 922 /* 923 * Verify a remote client has export rights and return these rights via 924 * exflagsp and credanonp. 925 */ 926 int 927 cd9660_check_export(struct mount *mp, struct mbuf *nam, int *exflagsp, 928 struct ucred **credanonp) 929 { 930 struct netcred *np; 931 struct iso_mnt *imp = VFSTOISOFS(mp); 932 933 /* 934 * Get the export permission structure for this <mp, client> tuple. 935 */ 936 np = vfs_export_lookup(mp, &imp->im_export, nam); 937 if (np == NULL) 938 return (EACCES); 939 940 *exflagsp = np->netc_exflags; 941 *credanonp = &np->netc_anon; 942 return (0); 943 } 944