1 /*- 2 * Copyright (c) 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley 6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 7 * Support code is derived from software contributed to Berkeley 8 * by Atsushi Murai (amurai@spec.co.jp). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 39 * $FreeBSD: src/sys/isofs/cd9660/cd9660_vfsops.c,v 1.74.2.7 2002/04/08 09:39:29 bde Exp $ 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/namei.h> 45 #include <sys/proc.h> 46 #include <sys/kernel.h> 47 #include <sys/vnode.h> 48 #include <sys/mount.h> 49 #include <sys/buf.h> 50 #include <sys/cdio.h> 51 #include <sys/conf.h> 52 #include <sys/fcntl.h> 53 #include <sys/malloc.h> 54 #include <sys/stat.h> 55 #include <sys/syslog.h> 56 57 #include <vm/vm_zone.h> 58 59 #include <isofs/cd9660/iso.h> 60 #include <isofs/cd9660/iso_rrip.h> 61 #include <isofs/cd9660/cd9660_node.h> 62 #include <isofs/cd9660/cd9660_mount.h> 63 64 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 65 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part"); 66 67 static int cd9660_mount __P((struct mount *, 68 char *, caddr_t, struct nameidata *, struct proc *)); 69 static int cd9660_unmount __P((struct mount *, int, struct proc *)); 70 static int cd9660_root __P((struct mount *, struct vnode **)); 71 static int cd9660_statfs __P((struct mount *, struct statfs *, struct proc *)); 72 static int cd9660_vget __P((struct mount *, ino_t, struct vnode **)); 73 static int cd9660_fhtovp __P((struct mount *, struct fid *, struct vnode **)); 74 static int cd9660_checkexp __P((struct mount *, struct sockaddr *, 75 int *, struct ucred **)); 76 static int cd9660_vptofh __P((struct vnode *, struct fid *)); 77 78 static struct vfsops cd9660_vfsops = { 79 cd9660_mount, 80 vfs_stdstart, 81 cd9660_unmount, 82 cd9660_root, 83 vfs_stdquotactl, 84 cd9660_statfs, 85 vfs_stdsync, 86 cd9660_vget, 87 cd9660_fhtovp, 88 cd9660_checkexp, 89 cd9660_vptofh, 90 cd9660_init, 91 cd9660_uninit, 92 vfs_stdextattrctl, 93 }; 94 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 95 MODULE_VERSION(cd9660, 1); 96 97 98 /* 99 * Called by vfs_mountroot when iso is going to be mounted as root. 100 */ 101 102 static int iso_get_ssector __P((dev_t dev, struct proc *p)); 103 static int iso_mountfs __P((struct vnode *devvp, struct mount *mp, 104 struct proc *p, struct iso_args *argp)); 105 106 /* 107 * Try to find the start of the last data track on this CD-ROM. This 108 * is used to mount the last session of a multi-session CD. Bail out 109 * and return 0 if we fail, this is always a safe bet. 110 */ 111 static int 112 iso_get_ssector(dev, p) 113 dev_t dev; 114 struct proc *p; 115 { 116 struct ioc_toc_header h; 117 struct ioc_read_toc_single_entry t; 118 int i; 119 struct cdevsw *bd; 120 d_ioctl_t *ioctlp; 121 122 bd = devsw(dev); 123 ioctlp = bd->d_ioctl; 124 if (ioctlp == NULL) 125 return 0; 126 127 if (ioctlp(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, p) != 0) 128 return 0; 129 130 for (i = h.ending_track; i >= 0; i--) { 131 t.address_format = CD_LBA_FORMAT; 132 t.track = i; 133 if (ioctlp(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, p) != 0) 134 return 0; 135 if ((t.entry.control & 4) != 0) 136 /* found a data track */ 137 break; 138 } 139 140 if (i < 0) 141 return 0; 142 143 return ntohl(t.entry.addr.lba); 144 } 145 146 static int iso_mountroot __P((struct mount *mp, struct proc *p)); 147 148 static int 149 iso_mountroot(mp, p) 150 struct mount *mp; 151 struct proc *p; 152 { 153 struct iso_args args; 154 int error; 155 156 if ((error = bdevvp(rootdev, &rootvp))) { 157 printf("iso_mountroot: can't find rootvp\n"); 158 return (error); 159 } 160 args.flags = ISOFSMNT_ROOT; 161 162 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, p); 163 error = VOP_OPEN(rootvp, FREAD, FSCRED, p); 164 VOP_UNLOCK(rootvp, 0, p); 165 if (error) 166 return (error); 167 168 args.ssector = iso_get_ssector(rootdev, p); 169 170 (void)VOP_CLOSE(rootvp, FREAD, NOCRED, p); 171 172 if (bootverbose) 173 printf("iso_mountroot(): using session at block %d\n", 174 args.ssector); 175 if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) 176 return (error); 177 178 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 179 return (0); 180 } 181 182 /* 183 * VFS Operations. 184 * 185 * mount system call 186 */ 187 static int 188 cd9660_mount(mp, path, data, ndp, p) 189 register struct mount *mp; 190 char *path; 191 caddr_t data; 192 struct nameidata *ndp; 193 struct proc *p; 194 { 195 struct vnode *devvp; 196 struct iso_args args; 197 size_t size; 198 int error; 199 mode_t accessmode; 200 struct iso_mnt *imp = 0; 201 202 if ((mp->mnt_flag & MNT_ROOTFS) != 0) { 203 return (iso_mountroot(mp, p)); 204 } 205 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 206 return (error); 207 208 if ((mp->mnt_flag & MNT_RDONLY) == 0) 209 return (EROFS); 210 211 /* 212 * If updating, check whether changing from read-only to 213 * read/write; if there is no device name, that's all we do. 214 */ 215 if (mp->mnt_flag & MNT_UPDATE) { 216 imp = VFSTOISOFS(mp); 217 if (args.fspec == 0) 218 return (vfs_export(mp, &imp->im_export, &args.export)); 219 } 220 /* 221 * Not an update, or updating the name: look up the name 222 * and verify that it refers to a sensible block device. 223 */ 224 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 225 if ((error = namei(ndp))) 226 return (error); 227 NDFREE(ndp, NDF_ONLY_PNBUF); 228 devvp = ndp->ni_vp; 229 230 if (!vn_isdisk(devvp, &error)) { 231 vrele(devvp); 232 return (error); 233 } 234 235 /* 236 * Verify that user has necessary permissions on the device, 237 * or has superuser abilities 238 */ 239 accessmode = VREAD; 240 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 241 error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p); 242 if (error) 243 error = suser(p); 244 if (error) { 245 vput(devvp); 246 return (error); 247 } 248 VOP_UNLOCK(devvp, 0, p); 249 250 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 251 error = iso_mountfs(devvp, mp, p, &args); 252 } else { 253 if (devvp != imp->im_devvp) 254 error = EINVAL; /* needs translation */ 255 else 256 vrele(devvp); 257 } 258 if (error) { 259 vrele(devvp); 260 return error; 261 } 262 imp = VFSTOISOFS(mp); 263 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 264 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 265 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 266 &size); 267 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 268 (void) cd9660_statfs(mp, &mp->mnt_stat, p); 269 return 0; 270 } 271 272 /* 273 * Common code for mount and mountroot 274 */ 275 static int 276 iso_mountfs(devvp, mp, p, argp) 277 register struct vnode *devvp; 278 struct mount *mp; 279 struct proc *p; 280 struct iso_args *argp; 281 { 282 register struct iso_mnt *isomp = (struct iso_mnt *)0; 283 struct buf *bp = NULL; 284 struct buf *pribp = NULL, *supbp = NULL; 285 dev_t dev = devvp->v_rdev; 286 int error = EINVAL; 287 int needclose = 0; 288 int high_sierra = 0; 289 int iso_bsize; 290 int iso_blknum; 291 int joliet_level; 292 struct iso_volume_descriptor *vdp = 0; 293 struct iso_primary_descriptor *pri = NULL; 294 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 295 struct iso_supplementary_descriptor *sup = NULL; 296 struct iso_directory_record *rootp; 297 int logical_block_size; 298 299 if (!(mp->mnt_flag & MNT_RDONLY)) 300 return EROFS; 301 302 /* 303 * Disallow multiple mounts of the same device. 304 * Disallow mounting of a device that is currently in use 305 * (except for root, which might share swap device for miniroot). 306 * Flush out any old buffers remaining from a previous use. 307 */ 308 if ((error = vfs_mountedon(devvp))) 309 return error; 310 if (vcount(devvp) > 1 && devvp != rootvp) 311 return EBUSY; 312 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0))) 313 return (error); 314 315 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 316 error = VOP_OPEN(devvp, FREAD, FSCRED, p); 317 VOP_UNLOCK(devvp, 0, p); 318 if (error) 319 return error; 320 if (devvp->v_rdev->si_iosize_max != 0) 321 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 322 if (mp->mnt_iosize_max > MAXPHYS) 323 mp->mnt_iosize_max = MAXPHYS; 324 325 needclose = 1; 326 327 /* This is the "logical sector size". The standard says this 328 * should be 2048 or the physical sector size on the device, 329 * whichever is greater. For now, we'll just use a constant. 330 */ 331 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 332 333 joliet_level = 0; 334 for (iso_blknum = 16 + argp->ssector; 335 iso_blknum < 100 + argp->ssector; 336 iso_blknum++) { 337 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 338 iso_bsize, NOCRED, &bp)) != 0) 339 goto out; 340 341 vdp = (struct iso_volume_descriptor *)bp->b_data; 342 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 343 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 344 sizeof vdp->id) != 0) { 345 error = EINVAL; 346 goto out; 347 } else 348 high_sierra = 1; 349 } 350 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 351 case ISO_VD_PRIMARY: 352 if (pribp == NULL) { 353 pribp = bp; 354 bp = NULL; 355 pri = (struct iso_primary_descriptor *)vdp; 356 pri_sierra = 357 (struct iso_sierra_primary_descriptor *)vdp; 358 } 359 break; 360 361 case ISO_VD_SUPPLEMENTARY: 362 if (supbp == NULL) { 363 supbp = bp; 364 bp = NULL; 365 sup = (struct iso_supplementary_descriptor *)vdp; 366 367 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 368 if (bcmp(sup->escape, "%/@", 3) == 0) 369 joliet_level = 1; 370 if (bcmp(sup->escape, "%/C", 3) == 0) 371 joliet_level = 2; 372 if (bcmp(sup->escape, "%/E", 3) == 0) 373 joliet_level = 3; 374 375 if ((isonum_711 (sup->flags) & 1) && 376 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 377 joliet_level = 0; 378 } 379 } 380 break; 381 382 case ISO_VD_END: 383 goto vd_end; 384 385 default: 386 break; 387 } 388 if (bp) { 389 brelse(bp); 390 bp = NULL; 391 } 392 } 393 vd_end: 394 if (bp) { 395 brelse(bp); 396 bp = NULL; 397 } 398 399 if (pri == NULL) { 400 error = EINVAL; 401 goto out; 402 } 403 404 logical_block_size = 405 isonum_723 (high_sierra? 406 pri_sierra->logical_block_size: 407 pri->logical_block_size); 408 409 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 410 || (logical_block_size & (logical_block_size - 1)) != 0) { 411 error = EINVAL; 412 goto out; 413 } 414 415 rootp = (struct iso_directory_record *) 416 (high_sierra? 417 pri_sierra->root_directory_record: 418 pri->root_directory_record); 419 420 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 421 bzero((caddr_t)isomp, sizeof *isomp); 422 isomp->logical_block_size = logical_block_size; 423 isomp->volume_space_size = 424 isonum_733 (high_sierra? 425 pri_sierra->volume_space_size: 426 pri->volume_space_size); 427 isomp->joliet_level = 0; 428 /* 429 * Since an ISO9660 multi-session CD can also access previous 430 * sessions, we have to include them into the space consider- 431 * ations. This doesn't yield a very accurate number since 432 * parts of the old sessions might be inaccessible now, but we 433 * can't do much better. This is also important for the NFS 434 * filehandle validation. 435 */ 436 isomp->volume_space_size += argp->ssector; 437 bcopy (rootp, isomp->root, sizeof isomp->root); 438 isomp->root_extent = isonum_733 (rootp->extent); 439 isomp->root_size = isonum_733 (rootp->size); 440 441 isomp->im_bmask = logical_block_size - 1; 442 isomp->im_bshift = ffs(logical_block_size) - 1; 443 444 pribp->b_flags |= B_AGE; 445 brelse(pribp); 446 pribp = NULL; 447 448 mp->mnt_data = (qaddr_t)isomp; 449 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 450 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 451 mp->mnt_maxsymlinklen = 0; 452 mp->mnt_flag |= MNT_LOCAL; 453 isomp->im_mountp = mp; 454 isomp->im_dev = dev; 455 isomp->im_devvp = devvp; 456 457 devvp->v_specmountpoint = mp; 458 459 /* Check the Rock Ridge Extention support */ 460 if (!(argp->flags & ISOFSMNT_NORRIP)) { 461 if ((error = bread(isomp->im_devvp, 462 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 463 (isomp->im_bshift - DEV_BSHIFT), 464 isomp->logical_block_size, NOCRED, &bp)) != 0) 465 goto out; 466 467 rootp = (struct iso_directory_record *)bp->b_data; 468 469 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 470 argp->flags |= ISOFSMNT_NORRIP; 471 } else { 472 argp->flags &= ~ISOFSMNT_GENS; 473 } 474 475 /* 476 * The contents are valid, 477 * but they will get reread as part of another vnode, so... 478 */ 479 bp->b_flags |= B_AGE; 480 brelse(bp); 481 bp = NULL; 482 } 483 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 484 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 485 486 if (high_sierra) { 487 /* this effectively ignores all the mount flags */ 488 log(LOG_INFO, "cd9660: High Sierra Format\n"); 489 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 490 } else 491 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 492 default: 493 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 494 break; 495 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 496 isomp->iso_ftype = ISO_FTYPE_9660; 497 break; 498 case 0: 499 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 500 isomp->iso_ftype = ISO_FTYPE_RRIP; 501 break; 502 } 503 504 /* Decide whether to use the Joliet descriptor */ 505 506 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 507 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 508 rootp = (struct iso_directory_record *) 509 sup->root_directory_record; 510 bcopy (rootp, isomp->root, sizeof isomp->root); 511 isomp->root_extent = isonum_733 (rootp->extent); 512 isomp->root_size = isonum_733 (rootp->size); 513 isomp->joliet_level = joliet_level; 514 supbp->b_flags |= B_AGE; 515 } 516 517 if (supbp) { 518 brelse(supbp); 519 supbp = NULL; 520 } 521 522 return 0; 523 out: 524 devvp->v_specmountpoint = NULL; 525 if (bp) 526 brelse(bp); 527 if (pribp) 528 brelse(pribp); 529 if (supbp) 530 brelse(supbp); 531 if (needclose) 532 (void)VOP_CLOSE(devvp, FREAD, NOCRED, p); 533 if (isomp) { 534 free((caddr_t)isomp, M_ISOFSMNT); 535 mp->mnt_data = (qaddr_t)0; 536 } 537 return error; 538 } 539 540 /* 541 * unmount system call 542 */ 543 static int 544 cd9660_unmount(mp, mntflags, p) 545 struct mount *mp; 546 int mntflags; 547 struct proc *p; 548 { 549 register struct iso_mnt *isomp; 550 int error, flags = 0; 551 552 if (mntflags & MNT_FORCE) 553 flags |= FORCECLOSE; 554 #if 0 555 mntflushbuf(mp, 0); 556 if (mntinvalbuf(mp)) 557 return EBUSY; 558 #endif 559 if ((error = vflush(mp, 0, flags))) 560 return (error); 561 562 isomp = VFSTOISOFS(mp); 563 564 isomp->im_devvp->v_specmountpoint = NULL; 565 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); 566 vrele(isomp->im_devvp); 567 free((caddr_t)isomp, M_ISOFSMNT); 568 mp->mnt_data = (qaddr_t)0; 569 mp->mnt_flag &= ~MNT_LOCAL; 570 return (error); 571 } 572 573 /* 574 * Return root of a filesystem 575 */ 576 static int 577 cd9660_root(mp, vpp) 578 struct mount *mp; 579 struct vnode **vpp; 580 { 581 struct iso_mnt *imp = VFSTOISOFS(mp); 582 struct iso_directory_record *dp = 583 (struct iso_directory_record *)imp->root; 584 ino_t ino = isodirino(dp, imp); 585 586 /* 587 * With RRIP we must use the `.' entry of the root directory. 588 * Simply tell vget, that it's a relocated directory. 589 */ 590 return (cd9660_vget_internal(mp, ino, vpp, 591 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 592 } 593 594 /* 595 * Get file system statistics. 596 */ 597 int 598 cd9660_statfs(mp, sbp, p) 599 struct mount *mp; 600 register struct statfs *sbp; 601 struct proc *p; 602 { 603 register struct iso_mnt *isomp; 604 605 isomp = VFSTOISOFS(mp); 606 607 sbp->f_bsize = isomp->logical_block_size; 608 sbp->f_iosize = sbp->f_bsize; /* XXX */ 609 sbp->f_blocks = isomp->volume_space_size; 610 sbp->f_bfree = 0; /* total free blocks */ 611 sbp->f_bavail = 0; /* blocks free for non superuser */ 612 sbp->f_files = 0; /* total files */ 613 sbp->f_ffree = 0; /* free file nodes */ 614 if (sbp != &mp->mnt_stat) { 615 sbp->f_type = mp->mnt_vfc->vfc_typenum; 616 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 617 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 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 /* ARGSUSED */ 640 int 641 cd9660_fhtovp(mp, fhp, vpp) 642 register struct mount *mp; 643 struct fid *fhp; 644 struct vnode **vpp; 645 { 646 struct ifid *ifhp = (struct ifid *)fhp; 647 register struct iso_node *ip; 648 struct vnode *nvp; 649 int error; 650 651 #ifdef ISOFS_DBG 652 printf("fhtovp: ino %d, start %ld\n", 653 ifhp->ifid_ino, ifhp->ifid_start); 654 #endif 655 656 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 657 *vpp = NULLVP; 658 return (error); 659 } 660 ip = VTOI(nvp); 661 if (ip->inode.iso_mode == 0) { 662 vput(nvp); 663 *vpp = NULLVP; 664 return (ESTALE); 665 } 666 *vpp = nvp; 667 return (0); 668 } 669 670 int 671 cd9660_checkexp(mp, nam, exflagsp, credanonp) 672 struct mount *mp; 673 struct sockaddr *nam; 674 int *exflagsp; 675 struct ucred **credanonp; 676 { 677 register struct netcred *np; 678 register struct iso_mnt *imp; 679 680 imp = VFSTOISOFS(mp); 681 682 /* 683 * Get the export permission structure for this <mp, client> tuple. 684 */ 685 np = vfs_export_lookup(mp, &imp->im_export, nam); 686 if (np == NULL) 687 return (EACCES); 688 689 *exflagsp = np->netc_exflags; 690 *credanonp = &np->netc_anon; 691 return (0); 692 } 693 694 int 695 cd9660_vget(mp, ino, vpp) 696 struct mount *mp; 697 ino_t ino; 698 struct vnode **vpp; 699 { 700 701 /* 702 * XXXX 703 * It would be nice if we didn't always set the `relocated' flag 704 * and force the extra read, but I don't want to think about fixing 705 * that right now. 706 */ 707 return (cd9660_vget_internal(mp, ino, vpp, 708 #if 0 709 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 710 #else 711 0, 712 #endif 713 (struct iso_directory_record *)0)); 714 } 715 716 int 717 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 718 struct mount *mp; 719 ino_t ino; 720 struct vnode **vpp; 721 int relocated; 722 struct iso_directory_record *isodir; 723 { 724 struct iso_mnt *imp; 725 struct iso_node *ip; 726 struct buf *bp; 727 struct vnode *vp; 728 dev_t dev; 729 int error; 730 731 imp = VFSTOISOFS(mp); 732 dev = imp->im_dev; 733 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 734 return (0); 735 736 /* Allocate a new vnode/iso_node. */ 737 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 738 *vpp = NULLVP; 739 return (error); 740 } 741 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 742 M_WAITOK); 743 bzero((caddr_t)ip, sizeof(struct iso_node)); 744 lockinit(&ip->i_lock, PINOD, "isonode", 0, 0); 745 vp->v_data = ip; 746 ip->i_vnode = vp; 747 ip->i_dev = dev; 748 ip->i_number = ino; 749 750 /* 751 * Put it onto its hash chain and lock it so that other requests for 752 * this inode will block if they arrive while we are sleeping waiting 753 * for old data structures to be purged or for the contents of the 754 * disk portion of this inode to be read. 755 */ 756 cd9660_ihashins(ip); 757 758 if (isodir == 0) { 759 int lbn, off; 760 761 lbn = lblkno(imp, ino); 762 if (lbn >= imp->volume_space_size) { 763 vput(vp); 764 printf("fhtovp: lbn exceed volume space %d\n", lbn); 765 return (ESTALE); 766 } 767 768 off = blkoff(imp, ino); 769 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 770 vput(vp); 771 printf("fhtovp: crosses block boundary %d\n", 772 off + ISO_DIRECTORY_RECORD_SIZE); 773 return (ESTALE); 774 } 775 776 error = bread(imp->im_devvp, 777 lbn << (imp->im_bshift - DEV_BSHIFT), 778 imp->logical_block_size, NOCRED, &bp); 779 if (error) { 780 vput(vp); 781 brelse(bp); 782 printf("fhtovp: bread error %d\n",error); 783 return (error); 784 } 785 isodir = (struct iso_directory_record *)(bp->b_data + off); 786 787 if (off + isonum_711(isodir->length) > 788 imp->logical_block_size) { 789 vput(vp); 790 if (bp != 0) 791 brelse(bp); 792 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 793 off +isonum_711(isodir->length), off, 794 isonum_711(isodir->length)); 795 return (ESTALE); 796 } 797 798 #if 0 799 if (isonum_733(isodir->extent) + 800 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 801 if (bp != 0) 802 brelse(bp); 803 printf("fhtovp: file start miss %d vs %d\n", 804 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 805 ifhp->ifid_start); 806 return (ESTALE); 807 } 808 #endif 809 } else 810 bp = 0; 811 812 ip->i_mnt = imp; 813 ip->i_devvp = imp->im_devvp; 814 VREF(ip->i_devvp); 815 816 if (relocated) { 817 /* 818 * On relocated directories we must 819 * read the `.' entry out of a dir. 820 */ 821 ip->iso_start = ino >> imp->im_bshift; 822 if (bp != 0) 823 brelse(bp); 824 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 825 vput(vp); 826 return (error); 827 } 828 isodir = (struct iso_directory_record *)bp->b_data; 829 } 830 831 ip->iso_extent = isonum_733(isodir->extent); 832 ip->i_size = isonum_733(isodir->size); 833 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 834 835 /* 836 * Setup time stamp, attribute 837 */ 838 vp->v_type = VNON; 839 switch (imp->iso_ftype) { 840 default: /* ISO_FTYPE_9660 */ 841 { 842 struct buf *bp2; 843 int off; 844 if ((imp->im_flags & ISOFSMNT_EXTATT) 845 && (off = isonum_711(isodir->ext_attr_length))) 846 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 847 &bp2); 848 else 849 bp2 = NULL; 850 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 851 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 852 if (bp2) 853 brelse(bp2); 854 break; 855 } 856 case ISO_FTYPE_RRIP: 857 cd9660_rrip_analyze(isodir, ip, imp); 858 break; 859 } 860 861 if (bp != 0) 862 brelse(bp); 863 864 /* 865 * Initialize the associated vnode 866 */ 867 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 868 case VFIFO: 869 vp->v_op = cd9660_fifoop_p; 870 break; 871 case VCHR: 872 case VBLK: 873 vp->v_op = cd9660_specop_p; 874 addaliasu(vp, ip->inode.iso_rdev); 875 break; 876 default: 877 break; 878 } 879 880 if (ip->iso_extent == imp->root_extent) 881 vp->v_flag |= VROOT; 882 883 /* 884 * XXX need generation number? 885 */ 886 887 *vpp = vp; 888 return (0); 889 } 890 891 /* 892 * Vnode pointer to File handle 893 */ 894 /* ARGSUSED */ 895 int 896 cd9660_vptofh(vp, fhp) 897 struct vnode *vp; 898 struct fid *fhp; 899 { 900 register struct iso_node *ip = VTOI(vp); 901 register struct ifid *ifhp; 902 903 ifhp = (struct ifid *)fhp; 904 ifhp->ifid_len = sizeof(struct ifid); 905 906 ifhp->ifid_ino = ip->i_number; 907 ifhp->ifid_start = ip->iso_start; 908 909 #ifdef ISOFS_DBG 910 printf("vptofh: ino %d, start %ld\n", 911 ifhp->ifid_ino,ifhp->ifid_start); 912 #endif 913 return 0; 914 } 915