1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley 8 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 9 * Support code is derived from software contributed to Berkeley 10 * by Atsushi Murai (amurai@spec.co.jp). 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/namei.h> 40 #include <sys/priv.h> 41 #include <sys/proc.h> 42 #include <sys/kernel.h> 43 #include <sys/vnode.h> 44 #include <sys/mount.h> 45 #include <sys/bio.h> 46 #include <sys/buf.h> 47 #include <sys/cdio.h> 48 #include <sys/conf.h> 49 #include <sys/fcntl.h> 50 #include <sys/malloc.h> 51 #include <sys/stat.h> 52 #include <sys/syslog.h> 53 #include <sys/iconv.h> 54 55 #include <fs/cd9660/iso.h> 56 #include <fs/cd9660/iso_rrip.h> 57 #include <fs/cd9660/cd9660_node.h> 58 #include <fs/cd9660/cd9660_mount.h> 59 60 #include <geom/geom.h> 61 #include <geom/geom_vfs.h> 62 63 MALLOC_DEFINE(M_ISOFSMNT, "isofs_mount", "ISOFS mount structure"); 64 MALLOC_DEFINE(M_ISOFSNODE, "isofs_node", "ISOFS vnode private part"); 65 66 struct iconv_functions *cd9660_iconv = NULL; 67 68 static vfs_mount_t cd9660_mount; 69 static vfs_cmount_t cd9660_cmount; 70 static vfs_unmount_t cd9660_unmount; 71 static vfs_root_t cd9660_root; 72 static vfs_statfs_t cd9660_statfs; 73 static vfs_vget_t cd9660_vget; 74 static vfs_fhtovp_t cd9660_fhtovp; 75 76 static struct vfsops cd9660_vfsops = { 77 .vfs_fhtovp = cd9660_fhtovp, 78 .vfs_mount = cd9660_mount, 79 .vfs_cmount = cd9660_cmount, 80 .vfs_root = cd9660_root, 81 .vfs_statfs = cd9660_statfs, 82 .vfs_unmount = cd9660_unmount, 83 .vfs_vget = cd9660_vget, 84 }; 85 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 86 MODULE_VERSION(cd9660, 1); 87 88 static int cd9660_vfs_hash_cmp(struct vnode *vp, void *pino); 89 static int iso_mountfs(struct vnode *devvp, struct mount *mp); 90 91 /* 92 * VFS Operations. 93 */ 94 95 static int 96 cd9660_cmount(struct mntarg *ma, void *data, uint64_t flags) 97 { 98 struct iso_args args; 99 int error; 100 101 error = copyin(data, &args, sizeof args); 102 if (error) 103 return (error); 104 105 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 106 ma = mount_arg(ma, "export", &args.export, sizeof(args.export)); 107 if (args.flags & ISOFSMNT_UID) 108 ma = mount_argf(ma, "uid", "%d", args.uid); 109 if (args.flags & ISOFSMNT_GID) 110 ma = mount_argf(ma, "gid", "%d", args.gid); 111 ma = mount_argf(ma, "mask", "%d", args.fmask); 112 ma = mount_argf(ma, "dirmask", "%d", args.dmask); 113 ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64); 114 ma = mount_argsu(ma, "cs_local", args.cs_local, 64); 115 ma = mount_argf(ma, "ssector", "%u", args.ssector); 116 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip"); 117 ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens"); 118 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt"); 119 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet"); 120 ma = mount_argb(ma, 121 args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet"); 122 ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv"); 123 124 error = kernel_mount(ma, flags); 125 126 return (error); 127 } 128 129 static int 130 cd9660_mount(struct mount *mp) 131 { 132 struct vnode *devvp; 133 struct thread *td; 134 char *fspec; 135 int error; 136 accmode_t accmode; 137 struct nameidata ndp; 138 struct iso_mnt *imp = NULL; 139 140 td = curthread; 141 142 /* 143 * Unconditionally mount as read-only. 144 */ 145 MNT_ILOCK(mp); 146 mp->mnt_flag |= MNT_RDONLY; 147 MNT_IUNLOCK(mp); 148 149 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 150 if (error) 151 return (error); 152 153 imp = VFSTOISOFS(mp); 154 155 if (mp->mnt_flag & MNT_UPDATE) { 156 if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0)) 157 return (0); 158 } 159 /* 160 * Not an update, or updating the name: look up the name 161 * and verify that it refers to a sensible block device. 162 */ 163 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec); 164 if ((error = namei(&ndp))) 165 return (error); 166 NDFREE_PNBUF(&ndp); 167 devvp = ndp.ni_vp; 168 169 if (!vn_isdisk_error(devvp, &error)) { 170 vput(devvp); 171 return (error); 172 } 173 174 /* 175 * Verify that user has necessary permissions on the device, 176 * or has superuser abilities 177 */ 178 accmode = VREAD; 179 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 180 if (error) 181 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 182 if (error) { 183 vput(devvp); 184 return (error); 185 } 186 187 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 188 error = iso_mountfs(devvp, mp); 189 if (error) 190 vrele(devvp); 191 } else { 192 if (devvp != imp->im_devvp) 193 error = EINVAL; /* needs translation */ 194 vput(devvp); 195 } 196 if (error) 197 return (error); 198 vfs_mountedfrom(mp, fspec); 199 return (0); 200 } 201 202 /* 203 * Common code for mount and mountroot 204 */ 205 static int 206 iso_mountfs(struct vnode *devvp, struct mount *mp) 207 { 208 struct iso_mnt *isomp = NULL; 209 struct buf *bp = NULL; 210 struct buf *pribp = NULL, *supbp = NULL; 211 struct cdev *dev; 212 int error = EINVAL; 213 int high_sierra = 0; 214 int iso_bsize; 215 int iso_blknum; 216 int joliet_level; 217 int isverified = 0; 218 struct iso_volume_descriptor *vdp = NULL; 219 struct iso_primary_descriptor *pri = NULL; 220 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 221 struct iso_supplementary_descriptor *sup = NULL; 222 struct iso_directory_record *rootp; 223 int logical_block_size, ssector; 224 struct g_consumer *cp; 225 struct bufobj *bo; 226 char *cs_local, *cs_disk; 227 int v; 228 229 dev = devvp->v_rdev; 230 dev_ref(dev); 231 g_topology_lock(); 232 error = g_vfs_open(devvp, &cp, "cd9660", 0); 233 if (error == 0) 234 g_getattr("MNT::verified", cp, &isverified); 235 g_topology_unlock(); 236 VOP_UNLOCK(devvp); 237 if (error) 238 goto out; 239 if (devvp->v_rdev->si_iosize_max != 0) 240 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 241 if (mp->mnt_iosize_max > maxphys) 242 mp->mnt_iosize_max = maxphys; 243 244 bo = &devvp->v_bufobj; 245 246 /* This is the "logical sector size". The standard says this 247 * should be 2048 or the physical sector size on the device, 248 * whichever is greater. 249 */ 250 if ((ISO_DEFAULT_BLOCK_SIZE % cp->provider->sectorsize) != 0) { 251 error = EINVAL; 252 goto out; 253 } 254 255 iso_bsize = cp->provider->sectorsize; 256 257 joliet_level = 0; 258 if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector)) 259 ssector = 0; 260 for (iso_blknum = 16 + ssector; 261 iso_blknum < 100 + ssector; 262 iso_blknum++) { 263 if ((error = bread(devvp, iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE), 264 iso_bsize, NOCRED, &bp)) != 0) 265 goto out; 266 267 vdp = (struct iso_volume_descriptor *)bp->b_data; 268 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 269 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 270 sizeof vdp->id_sierra) != 0) { 271 error = EINVAL; 272 goto out; 273 } else 274 high_sierra = 1; 275 } 276 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 277 case ISO_VD_PRIMARY: 278 if (pribp == NULL) { 279 pribp = bp; 280 bp = NULL; 281 pri = (struct iso_primary_descriptor *)vdp; 282 pri_sierra = 283 (struct iso_sierra_primary_descriptor *)vdp; 284 } 285 break; 286 287 case ISO_VD_SUPPLEMENTARY: 288 if (supbp == NULL) { 289 supbp = bp; 290 bp = NULL; 291 sup = (struct iso_supplementary_descriptor *)vdp; 292 293 if (!vfs_flagopt(mp->mnt_optnew, "nojoliet", NULL, 0)) { 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 !vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0)) 303 joliet_level = 0; 304 } 305 } 306 break; 307 308 case ISO_VD_END: 309 goto vd_end; 310 311 default: 312 break; 313 } 314 if (bp != NULL) { 315 brelse(bp); 316 bp = NULL; 317 } 318 } 319 vd_end: 320 if (bp != NULL) { 321 brelse(bp); 322 bp = NULL; 323 } 324 325 if (pri == NULL) { 326 error = EINVAL; 327 goto out; 328 } 329 330 logical_block_size = 331 isonum_723 (high_sierra? 332 pri_sierra->logical_block_size: 333 pri->logical_block_size); 334 335 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 336 || (logical_block_size & (logical_block_size - 1)) != 0) { 337 error = EINVAL; 338 goto out; 339 } 340 341 if (logical_block_size < cp->provider->sectorsize) { 342 printf("cd9660: Unsupported logical block size %u\n", 343 logical_block_size); 344 error = EINVAL; 345 goto out; 346 } 347 348 rootp = (struct iso_directory_record *) 349 (high_sierra? 350 pri_sierra->root_directory_record: 351 pri->root_directory_record); 352 353 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 354 isomp->im_cp = cp; 355 isomp->im_bo = bo; 356 isomp->logical_block_size = logical_block_size; 357 isomp->volume_space_size = 358 isonum_733 (high_sierra? 359 pri_sierra->volume_space_size: 360 pri->volume_space_size); 361 isomp->joliet_level = 0; 362 /* 363 * Since an ISO9660 multi-session CD can also access previous 364 * sessions, we have to include them into the space consider- 365 * ations. This doesn't yield a very accurate number since 366 * parts of the old sessions might be inaccessible now, but we 367 * can't do much better. This is also important for the NFS 368 * filehandle validation. 369 */ 370 isomp->volume_space_size += ssector; 371 memcpy(isomp->root, rootp, sizeof isomp->root); 372 isomp->root_extent = isonum_733 (rootp->extent); 373 isomp->root_size = isonum_733 (rootp->size); 374 375 isomp->im_bmask = logical_block_size - 1; 376 isomp->im_bshift = ffs(logical_block_size) - 1; 377 378 pribp->b_flags |= B_AGE; 379 brelse(pribp); 380 pribp = NULL; 381 rootp = NULL; 382 pri = NULL; 383 pri_sierra = NULL; 384 385 mp->mnt_data = isomp; 386 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 387 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 388 MNT_ILOCK(mp); 389 if (isverified) 390 mp->mnt_flag |= MNT_VERIFIED; 391 mp->mnt_flag |= MNT_LOCAL; 392 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED; 393 MNT_IUNLOCK(mp); 394 isomp->im_mountp = mp; 395 isomp->im_dev = dev; 396 isomp->im_devvp = devvp; 397 isomp->im_fmask = isomp->im_dmask = ACCESSPERMS; 398 399 vfs_flagopt(mp->mnt_optnew, "norrip", &isomp->im_flags, ISOFSMNT_NORRIP); 400 vfs_flagopt(mp->mnt_optnew, "gens", &isomp->im_flags, ISOFSMNT_GENS); 401 vfs_flagopt(mp->mnt_optnew, "extatt", &isomp->im_flags, ISOFSMNT_EXTATT); 402 vfs_flagopt(mp->mnt_optnew, "nojoliet", &isomp->im_flags, ISOFSMNT_NOJOLIET); 403 vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV); 404 405 if (vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v) == 1) { 406 isomp->im_flags |= ISOFSMNT_UID; 407 isomp->im_uid = v; 408 } 409 if (vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v) == 1) { 410 isomp->im_flags |= ISOFSMNT_GID; 411 isomp->im_gid = v; 412 } 413 if (vfs_scanopt(mp->mnt_optnew, "mask", "%d", &v) == 1) { 414 isomp->im_fmask &= v; 415 } 416 if (vfs_scanopt(mp->mnt_optnew, "dirmask", "%d", &v) == 1) { 417 isomp->im_dmask &= v; 418 } 419 420 /* Check the Rock Ridge Extension support */ 421 if (!(isomp->im_flags & ISOFSMNT_NORRIP)) { 422 if ((error = bread(isomp->im_devvp, (isomp->root_extent + 423 isonum_711(((struct iso_directory_record *)isomp->root)-> 424 ext_attr_length)) << (isomp->im_bshift - DEV_BSHIFT), 425 isomp->logical_block_size, NOCRED, &bp)) != 0) 426 goto out; 427 428 rootp = (struct iso_directory_record *)bp->b_data; 429 430 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 431 isomp->im_flags |= ISOFSMNT_NORRIP; 432 } else { 433 isomp->im_flags &= ~ISOFSMNT_GENS; 434 } 435 436 /* 437 * The contents are valid, 438 * but they will get reread as part of another vnode, so... 439 */ 440 bp->b_flags |= B_AGE; 441 brelse(bp); 442 bp = NULL; 443 rootp = NULL; 444 } 445 446 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 447 cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error); 448 if (error) 449 goto out; 450 cs_disk = vfs_getopts(mp->mnt_optnew, "cs_disk", &error); 451 if (error) 452 goto out; 453 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l); 454 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d); 455 } else { 456 isomp->im_d2l = NULL; 457 isomp->im_l2d = NULL; 458 } 459 460 if (high_sierra) { 461 /* this effectively ignores all the mount flags */ 462 if (bootverbose) 463 log(LOG_INFO, "cd9660: High Sierra Format\n"); 464 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 465 } else 466 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 467 default: 468 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 469 break; 470 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 471 isomp->iso_ftype = ISO_FTYPE_9660; 472 break; 473 case 0: 474 if (bootverbose) 475 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 476 isomp->iso_ftype = ISO_FTYPE_RRIP; 477 break; 478 } 479 480 /* Decide whether to use the Joliet descriptor */ 481 482 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 483 if (bootverbose) 484 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", 485 joliet_level); 486 rootp = (struct iso_directory_record *) 487 sup->root_directory_record; 488 memcpy(isomp->root, rootp, sizeof isomp->root); 489 isomp->root_extent = isonum_733 (rootp->extent); 490 isomp->root_size = isonum_733 (rootp->size); 491 isomp->joliet_level = joliet_level; 492 supbp->b_flags |= B_AGE; 493 } 494 495 if (supbp) { 496 brelse(supbp); 497 supbp = NULL; 498 sup = NULL; 499 } 500 501 return 0; 502 out: 503 if (bp != NULL) 504 brelse(bp); 505 if (pribp != NULL) 506 brelse(pribp); 507 if (supbp != NULL) 508 brelse(supbp); 509 if (cp != NULL) { 510 g_topology_lock(); 511 g_vfs_close(cp); 512 g_topology_unlock(); 513 } 514 if (isomp) { 515 free(isomp, M_ISOFSMNT); 516 mp->mnt_data = NULL; 517 } 518 dev_rel(dev); 519 return error; 520 } 521 522 /* 523 * unmount system call 524 */ 525 static int 526 cd9660_unmount(struct mount *mp, int mntflags) 527 { 528 struct iso_mnt *isomp; 529 int error, flags = 0; 530 531 if (mntflags & MNT_FORCE) 532 flags |= FORCECLOSE; 533 if ((error = vflush(mp, 0, flags, curthread))) 534 return (error); 535 536 isomp = VFSTOISOFS(mp); 537 538 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 539 if (isomp->im_d2l) 540 cd9660_iconv->close(isomp->im_d2l); 541 if (isomp->im_l2d) 542 cd9660_iconv->close(isomp->im_l2d); 543 } 544 g_topology_lock(); 545 g_vfs_close(isomp->im_cp); 546 g_topology_unlock(); 547 vrele(isomp->im_devvp); 548 dev_rel(isomp->im_dev); 549 free(isomp, M_ISOFSMNT); 550 mp->mnt_data = NULL; 551 return (error); 552 } 553 554 /* 555 * Return root of a filesystem 556 */ 557 static int 558 cd9660_root(struct mount *mp, int flags, struct vnode **vpp) 559 { 560 struct iso_mnt *imp = VFSTOISOFS(mp); 561 struct iso_directory_record *dp = 562 (struct iso_directory_record *)imp->root; 563 cd_ino_t ino = isodirino(dp, imp); 564 565 /* 566 * With RRIP we must use the `.' entry of the root directory. 567 * Simply tell vget, that it's a relocated directory. 568 */ 569 return (cd9660_vget_internal(mp, ino, flags, vpp, 570 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 571 } 572 573 /* 574 * Get filesystem statistics. 575 */ 576 static int 577 cd9660_statfs(struct mount *mp, struct statfs *sbp) 578 { 579 struct iso_mnt *isomp; 580 581 isomp = VFSTOISOFS(mp); 582 583 sbp->f_bsize = isomp->logical_block_size; 584 sbp->f_iosize = sbp->f_bsize; /* XXX */ 585 sbp->f_blocks = isomp->volume_space_size; 586 sbp->f_bfree = 0; /* total free blocks */ 587 sbp->f_bavail = 0; /* blocks free for non superuser */ 588 sbp->f_files = 0; /* total files */ 589 sbp->f_ffree = 0; /* free file nodes */ 590 return 0; 591 } 592 593 /* 594 * File handle to vnode 595 * 596 * Have to be really careful about stale file handles: 597 * - check that the inode number is in range 598 * - call iget() to get the locked inode 599 * - check for an unallocated inode (i_mode == 0) 600 * - check that the generation number matches 601 */ 602 603 /* ARGSUSED */ 604 static int 605 cd9660_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp) 606 { 607 struct ifid ifh; 608 struct iso_node *ip; 609 struct vnode *nvp; 610 int error; 611 612 memcpy(&ifh, fhp, sizeof(ifh)); 613 614 #ifdef ISOFS_DBG 615 printf("fhtovp: ino %d, start %ld\n", 616 ifh.ifid_ino, ifh.ifid_start); 617 #endif 618 619 if ((error = VFS_VGET(mp, ifh.ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 620 *vpp = NULLVP; 621 return (error); 622 } 623 ip = VTOI(nvp); 624 if (ip->inode.iso_mode == 0) { 625 vput(nvp); 626 *vpp = NULLVP; 627 return (ESTALE); 628 } 629 *vpp = nvp; 630 vnode_create_vobject(*vpp, ip->i_size, curthread); 631 return (0); 632 } 633 634 /* 635 * Conform to standard VFS interface; can't vget arbitrary inodes beyond 4GB 636 * into media with current inode scheme and 32-bit ino_t. This shouldn't be 637 * needed for anything other than nfsd, and who exports a mounted DVD over NFS? 638 */ 639 static int 640 cd9660_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 641 { 642 643 /* 644 * XXXX 645 * It would be nice if we didn't always set the `relocated' flag 646 * and force the extra read, but I don't want to think about fixing 647 * that right now. 648 */ 649 return (cd9660_vget_internal(mp, ino, flags, vpp, 650 #if 0 651 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 652 #else 653 0, 654 #endif 655 (struct iso_directory_record *)0)); 656 } 657 658 /* Use special comparator for full 64-bit ino comparison. */ 659 static int 660 cd9660_vfs_hash_cmp(struct vnode *vp, void *pino) 661 { 662 struct iso_node *ip; 663 cd_ino_t ino; 664 665 ip = VTOI(vp); 666 ino = *(cd_ino_t *)pino; 667 return (ip->i_number != ino); 668 } 669 670 int 671 cd9660_vget_internal(struct mount *mp, cd_ino_t ino, int flags, 672 struct vnode **vpp, int relocated, struct iso_directory_record *isodir) 673 { 674 struct iso_mnt *imp; 675 struct iso_node *ip; 676 struct buf *bp; 677 struct vnode *vp; 678 int error; 679 struct thread *td; 680 681 td = curthread; 682 error = vfs_hash_get(mp, ino, flags, td, vpp, cd9660_vfs_hash_cmp, 683 &ino); 684 if (error || *vpp != NULL) 685 return (error); 686 687 /* 688 * We must promote to an exclusive lock for vnode creation. This 689 * can happen if lookup is passed LOCKSHARED. 690 */ 691 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 692 flags &= ~LK_TYPE_MASK; 693 flags |= LK_EXCLUSIVE; 694 } 695 696 /* 697 * We do not lock vnode creation as it is believed to be too 698 * expensive for such rare case as simultaneous creation of vnode 699 * for same ino by different processes. We just allow them to race 700 * and check later to decide who wins. Let the race begin! 701 */ 702 703 imp = VFSTOISOFS(mp); 704 705 /* Allocate a new vnode/iso_node. */ 706 if ((error = getnewvnode("isofs", mp, &cd9660_vnodeops, &vp)) != 0) { 707 *vpp = NULLVP; 708 return (error); 709 } 710 ip = malloc(sizeof(struct iso_node), M_ISOFSNODE, 711 M_WAITOK | M_ZERO); 712 vp->v_data = ip; 713 ip->i_vnode = vp; 714 ip->i_number = ino; 715 716 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 717 error = insmntque(vp, mp); 718 if (error != 0) { 719 free(ip, M_ISOFSNODE); 720 *vpp = NULLVP; 721 return (error); 722 } 723 error = vfs_hash_insert(vp, ino, flags, td, vpp, cd9660_vfs_hash_cmp, 724 &ino); 725 if (error || *vpp != NULL) 726 return (error); 727 728 if (isodir == NULL) { 729 int lbn, off; 730 731 lbn = lblkno(imp, ino); 732 if (lbn >= imp->volume_space_size) { 733 vput(vp); 734 printf("fhtovp: lbn exceed volume space %d\n", lbn); 735 return (ESTALE); 736 } 737 738 off = blkoff(imp, ino); 739 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 740 vput(vp); 741 printf("fhtovp: crosses block boundary %d\n", 742 off + ISO_DIRECTORY_RECORD_SIZE); 743 return (ESTALE); 744 } 745 746 error = bread(imp->im_devvp, 747 lbn << (imp->im_bshift - DEV_BSHIFT), 748 imp->logical_block_size, NOCRED, &bp); 749 if (error) { 750 vput(vp); 751 printf("fhtovp: bread error %d\n",error); 752 return (error); 753 } 754 isodir = (struct iso_directory_record *)(bp->b_data + off); 755 756 if (off + isonum_711(isodir->length) > 757 imp->logical_block_size) { 758 vput(vp); 759 brelse(bp); 760 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 761 off +isonum_711(isodir->length), off, 762 isonum_711(isodir->length)); 763 return (ESTALE); 764 } 765 766 #if 0 767 if (isonum_733(isodir->extent) + 768 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 769 brelse(bp); 770 printf("fhtovp: file start miss %d vs %d\n", 771 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 772 ifhp->ifid_start); 773 return (ESTALE); 774 } 775 #endif 776 } else 777 bp = NULL; 778 779 ip->i_mnt = imp; 780 781 if (relocated) { 782 /* 783 * On relocated directories we must 784 * read the `.' entry out of a dir. 785 */ 786 ip->iso_start = ino >> imp->im_bshift; 787 if (bp != NULL) 788 brelse(bp); 789 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 790 vput(vp); 791 return (error); 792 } 793 isodir = (struct iso_directory_record *)bp->b_data; 794 } 795 796 ip->iso_extent = isonum_733(isodir->extent); 797 ip->i_size = isonum_733(isodir->size); 798 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 799 800 /* 801 * Setup time stamp, attribute 802 */ 803 vp->v_type = VNON; 804 switch (imp->iso_ftype) { 805 default: /* ISO_FTYPE_9660 */ 806 { 807 struct buf *bp2; 808 int off; 809 if ((imp->im_flags & ISOFSMNT_EXTATT) 810 && (off = isonum_711(isodir->ext_attr_length))) 811 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 812 &bp2); 813 else 814 bp2 = NULL; 815 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 816 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 817 if (bp2) 818 brelse(bp2); 819 break; 820 } 821 case ISO_FTYPE_RRIP: 822 cd9660_rrip_analyze(isodir, ip, imp); 823 break; 824 } 825 826 brelse(bp); 827 828 /* 829 * Initialize the associated vnode 830 */ 831 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 832 case VFIFO: 833 vp->v_op = &cd9660_fifoops; 834 break; 835 default: 836 VN_LOCK_ASHARE(vp); 837 break; 838 } 839 840 if (ip->iso_extent == imp->root_extent) 841 vp->v_vflag |= VV_ROOT; 842 843 /* 844 * XXX need generation number? 845 */ 846 847 vn_set_state(vp, VSTATE_CONSTRUCTED); 848 *vpp = vp; 849 return (0); 850 } 851