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 * $DragonFly: src/sys/vfs/isofs/cd9660/cd9660_vfsops.c,v 1.2 2003/06/17 04:28:41 dillon Exp $ 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/namei.h> 46 #include <sys/proc.h> 47 #include <sys/kernel.h> 48 #include <sys/vnode.h> 49 #include <sys/mount.h> 50 #include <sys/buf.h> 51 #include <sys/cdio.h> 52 #include <sys/conf.h> 53 #include <sys/fcntl.h> 54 #include <sys/malloc.h> 55 #include <sys/stat.h> 56 #include <sys/syslog.h> 57 58 #include <vm/vm_zone.h> 59 60 #include <isofs/cd9660/iso.h> 61 #include <isofs/cd9660/iso_rrip.h> 62 #include <isofs/cd9660/cd9660_node.h> 63 #include <isofs/cd9660/cd9660_mount.h> 64 65 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 66 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part"); 67 68 static int cd9660_mount __P((struct mount *, 69 char *, caddr_t, struct nameidata *, struct proc *)); 70 static int cd9660_unmount __P((struct mount *, int, struct proc *)); 71 static int cd9660_root __P((struct mount *, struct vnode **)); 72 static int cd9660_statfs __P((struct mount *, struct statfs *, struct proc *)); 73 static int cd9660_vget __P((struct mount *, ino_t, struct vnode **)); 74 static int cd9660_fhtovp __P((struct mount *, struct fid *, struct vnode **)); 75 static int cd9660_checkexp __P((struct mount *, struct sockaddr *, 76 int *, struct ucred **)); 77 static int cd9660_vptofh __P((struct vnode *, struct fid *)); 78 79 static struct vfsops cd9660_vfsops = { 80 cd9660_mount, 81 vfs_stdstart, 82 cd9660_unmount, 83 cd9660_root, 84 vfs_stdquotactl, 85 cd9660_statfs, 86 vfs_stdsync, 87 cd9660_vget, 88 cd9660_fhtovp, 89 cd9660_checkexp, 90 cd9660_vptofh, 91 cd9660_init, 92 cd9660_uninit, 93 vfs_stdextattrctl, 94 }; 95 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 96 MODULE_VERSION(cd9660, 1); 97 98 99 /* 100 * Called by vfs_mountroot when iso is going to be mounted as root. 101 */ 102 103 static int iso_get_ssector __P((dev_t dev, struct proc *p)); 104 static int iso_mountfs __P((struct vnode *devvp, struct mount *mp, 105 struct proc *p, struct iso_args *argp)); 106 107 /* 108 * Try to find the start of the last data track on this CD-ROM. This 109 * is used to mount the last session of a multi-session CD. Bail out 110 * and return 0 if we fail, this is always a safe bet. 111 */ 112 static int 113 iso_get_ssector(dev, p) 114 dev_t dev; 115 struct proc *p; 116 { 117 struct ioc_toc_header h; 118 struct ioc_read_toc_single_entry t; 119 int i; 120 struct cdevsw *bd; 121 d_ioctl_t *ioctlp; 122 123 bd = devsw(dev); 124 ioctlp = bd->d_ioctl; 125 if (ioctlp == NULL) 126 return 0; 127 128 if (ioctlp(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, p) != 0) 129 return 0; 130 131 for (i = h.ending_track; i >= 0; i--) { 132 t.address_format = CD_LBA_FORMAT; 133 t.track = i; 134 if (ioctlp(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, p) != 0) 135 return 0; 136 if ((t.entry.control & 4) != 0) 137 /* found a data track */ 138 break; 139 } 140 141 if (i < 0) 142 return 0; 143 144 return ntohl(t.entry.addr.lba); 145 } 146 147 static int iso_mountroot __P((struct mount *mp, struct proc *p)); 148 149 static int 150 iso_mountroot(mp, p) 151 struct mount *mp; 152 struct proc *p; 153 { 154 struct iso_args args; 155 int error; 156 157 if ((error = bdevvp(rootdev, &rootvp))) { 158 printf("iso_mountroot: can't find rootvp\n"); 159 return (error); 160 } 161 args.flags = ISOFSMNT_ROOT; 162 163 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, p); 164 error = VOP_OPEN(rootvp, FREAD, FSCRED, p); 165 VOP_UNLOCK(rootvp, 0, p); 166 if (error) 167 return (error); 168 169 args.ssector = iso_get_ssector(rootdev, p); 170 171 (void)VOP_CLOSE(rootvp, FREAD, NOCRED, p); 172 173 if (bootverbose) 174 printf("iso_mountroot(): using session at block %d\n", 175 args.ssector); 176 if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) 177 return (error); 178 179 (void)cd9660_statfs(mp, &mp->mnt_stat, p); 180 return (0); 181 } 182 183 /* 184 * VFS Operations. 185 * 186 * mount system call 187 */ 188 static int 189 cd9660_mount(mp, path, data, ndp, p) 190 register struct mount *mp; 191 char *path; 192 caddr_t data; 193 struct nameidata *ndp; 194 struct proc *p; 195 { 196 struct vnode *devvp; 197 struct iso_args args; 198 size_t size; 199 int error; 200 mode_t accessmode; 201 struct iso_mnt *imp = 0; 202 203 if ((mp->mnt_flag & MNT_ROOTFS) != 0) { 204 return (iso_mountroot(mp, p)); 205 } 206 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 207 return (error); 208 209 if ((mp->mnt_flag & MNT_RDONLY) == 0) 210 return (EROFS); 211 212 /* 213 * If updating, check whether changing from read-only to 214 * read/write; if there is no device name, that's all we do. 215 */ 216 if (mp->mnt_flag & MNT_UPDATE) { 217 imp = VFSTOISOFS(mp); 218 if (args.fspec == 0) 219 return (vfs_export(mp, &imp->im_export, &args.export)); 220 } 221 /* 222 * Not an update, or updating the name: look up the name 223 * and verify that it refers to a sensible block device. 224 */ 225 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 226 if ((error = namei(ndp))) 227 return (error); 228 NDFREE(ndp, NDF_ONLY_PNBUF); 229 devvp = ndp->ni_vp; 230 231 if (!vn_isdisk(devvp, &error)) { 232 vrele(devvp); 233 return (error); 234 } 235 236 /* 237 * Verify that user has necessary permissions on the device, 238 * or has superuser abilities 239 */ 240 accessmode = VREAD; 241 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 242 error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p); 243 if (error) 244 error = suser(p); 245 if (error) { 246 vput(devvp); 247 return (error); 248 } 249 VOP_UNLOCK(devvp, 0, p); 250 251 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 252 error = iso_mountfs(devvp, mp, p, &args); 253 } else { 254 if (devvp != imp->im_devvp) 255 error = EINVAL; /* needs translation */ 256 else 257 vrele(devvp); 258 } 259 if (error) { 260 vrele(devvp); 261 return error; 262 } 263 imp = VFSTOISOFS(mp); 264 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 265 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 266 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 267 &size); 268 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 269 (void) cd9660_statfs(mp, &mp->mnt_stat, p); 270 return 0; 271 } 272 273 /* 274 * Common code for mount and mountroot 275 */ 276 static int 277 iso_mountfs(devvp, mp, p, argp) 278 register struct vnode *devvp; 279 struct mount *mp; 280 struct proc *p; 281 struct iso_args *argp; 282 { 283 register struct iso_mnt *isomp = (struct iso_mnt *)0; 284 struct buf *bp = NULL; 285 struct buf *pribp = NULL, *supbp = NULL; 286 dev_t dev = devvp->v_rdev; 287 int error = EINVAL; 288 int needclose = 0; 289 int high_sierra = 0; 290 int iso_bsize; 291 int iso_blknum; 292 int joliet_level; 293 struct iso_volume_descriptor *vdp = 0; 294 struct iso_primary_descriptor *pri = NULL; 295 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 296 struct iso_supplementary_descriptor *sup = NULL; 297 struct iso_directory_record *rootp; 298 int logical_block_size; 299 300 if (!(mp->mnt_flag & MNT_RDONLY)) 301 return EROFS; 302 303 /* 304 * Disallow multiple mounts of the same device. 305 * Disallow mounting of a device that is currently in use 306 * (except for root, which might share swap device for miniroot). 307 * Flush out any old buffers remaining from a previous use. 308 */ 309 if ((error = vfs_mountedon(devvp))) 310 return error; 311 if (vcount(devvp) > 1 && devvp != rootvp) 312 return EBUSY; 313 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0))) 314 return (error); 315 316 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 317 error = VOP_OPEN(devvp, FREAD, FSCRED, p); 318 VOP_UNLOCK(devvp, 0, p); 319 if (error) 320 return error; 321 if (devvp->v_rdev->si_iosize_max != 0) 322 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 323 if (mp->mnt_iosize_max > MAXPHYS) 324 mp->mnt_iosize_max = MAXPHYS; 325 326 needclose = 1; 327 328 /* This is the "logical sector size". The standard says this 329 * should be 2048 or the physical sector size on the device, 330 * whichever is greater. For now, we'll just use a constant. 331 */ 332 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 333 334 joliet_level = 0; 335 for (iso_blknum = 16 + argp->ssector; 336 iso_blknum < 100 + argp->ssector; 337 iso_blknum++) { 338 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 339 iso_bsize, NOCRED, &bp)) != 0) 340 goto out; 341 342 vdp = (struct iso_volume_descriptor *)bp->b_data; 343 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 344 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 345 sizeof vdp->id) != 0) { 346 error = EINVAL; 347 goto out; 348 } else 349 high_sierra = 1; 350 } 351 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 352 case ISO_VD_PRIMARY: 353 if (pribp == NULL) { 354 pribp = bp; 355 bp = NULL; 356 pri = (struct iso_primary_descriptor *)vdp; 357 pri_sierra = 358 (struct iso_sierra_primary_descriptor *)vdp; 359 } 360 break; 361 362 case ISO_VD_SUPPLEMENTARY: 363 if (supbp == NULL) { 364 supbp = bp; 365 bp = NULL; 366 sup = (struct iso_supplementary_descriptor *)vdp; 367 368 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 369 if (bcmp(sup->escape, "%/@", 3) == 0) 370 joliet_level = 1; 371 if (bcmp(sup->escape, "%/C", 3) == 0) 372 joliet_level = 2; 373 if (bcmp(sup->escape, "%/E", 3) == 0) 374 joliet_level = 3; 375 376 if ((isonum_711 (sup->flags) & 1) && 377 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 378 joliet_level = 0; 379 } 380 } 381 break; 382 383 case ISO_VD_END: 384 goto vd_end; 385 386 default: 387 break; 388 } 389 if (bp) { 390 brelse(bp); 391 bp = NULL; 392 } 393 } 394 vd_end: 395 if (bp) { 396 brelse(bp); 397 bp = NULL; 398 } 399 400 if (pri == NULL) { 401 error = EINVAL; 402 goto out; 403 } 404 405 logical_block_size = 406 isonum_723 (high_sierra? 407 pri_sierra->logical_block_size: 408 pri->logical_block_size); 409 410 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 411 || (logical_block_size & (logical_block_size - 1)) != 0) { 412 error = EINVAL; 413 goto out; 414 } 415 416 rootp = (struct iso_directory_record *) 417 (high_sierra? 418 pri_sierra->root_directory_record: 419 pri->root_directory_record); 420 421 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 422 bzero((caddr_t)isomp, sizeof *isomp); 423 isomp->logical_block_size = logical_block_size; 424 isomp->volume_space_size = 425 isonum_733 (high_sierra? 426 pri_sierra->volume_space_size: 427 pri->volume_space_size); 428 isomp->joliet_level = 0; 429 /* 430 * Since an ISO9660 multi-session CD can also access previous 431 * sessions, we have to include them into the space consider- 432 * ations. This doesn't yield a very accurate number since 433 * parts of the old sessions might be inaccessible now, but we 434 * can't do much better. This is also important for the NFS 435 * filehandle validation. 436 */ 437 isomp->volume_space_size += argp->ssector; 438 bcopy (rootp, isomp->root, sizeof isomp->root); 439 isomp->root_extent = isonum_733 (rootp->extent); 440 isomp->root_size = isonum_733 (rootp->size); 441 442 isomp->im_bmask = logical_block_size - 1; 443 isomp->im_bshift = ffs(logical_block_size) - 1; 444 445 pribp->b_flags |= B_AGE; 446 brelse(pribp); 447 pribp = NULL; 448 449 mp->mnt_data = (qaddr_t)isomp; 450 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 451 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 452 mp->mnt_maxsymlinklen = 0; 453 mp->mnt_flag |= MNT_LOCAL; 454 isomp->im_mountp = mp; 455 isomp->im_dev = dev; 456 isomp->im_devvp = devvp; 457 458 devvp->v_specmountpoint = mp; 459 460 /* Check the Rock Ridge Extention support */ 461 if (!(argp->flags & ISOFSMNT_NORRIP)) { 462 if ((error = bread(isomp->im_devvp, 463 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 464 (isomp->im_bshift - DEV_BSHIFT), 465 isomp->logical_block_size, NOCRED, &bp)) != 0) 466 goto out; 467 468 rootp = (struct iso_directory_record *)bp->b_data; 469 470 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 471 argp->flags |= ISOFSMNT_NORRIP; 472 } else { 473 argp->flags &= ~ISOFSMNT_GENS; 474 } 475 476 /* 477 * The contents are valid, 478 * but they will get reread as part of another vnode, so... 479 */ 480 bp->b_flags |= B_AGE; 481 brelse(bp); 482 bp = NULL; 483 } 484 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 485 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 486 487 if (high_sierra) { 488 /* this effectively ignores all the mount flags */ 489 log(LOG_INFO, "cd9660: High Sierra Format\n"); 490 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 491 } else 492 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 493 default: 494 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 495 break; 496 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 497 isomp->iso_ftype = ISO_FTYPE_9660; 498 break; 499 case 0: 500 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 501 isomp->iso_ftype = ISO_FTYPE_RRIP; 502 break; 503 } 504 505 /* Decide whether to use the Joliet descriptor */ 506 507 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 508 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 509 rootp = (struct iso_directory_record *) 510 sup->root_directory_record; 511 bcopy (rootp, isomp->root, sizeof isomp->root); 512 isomp->root_extent = isonum_733 (rootp->extent); 513 isomp->root_size = isonum_733 (rootp->size); 514 isomp->joliet_level = joliet_level; 515 supbp->b_flags |= B_AGE; 516 } 517 518 if (supbp) { 519 brelse(supbp); 520 supbp = NULL; 521 } 522 523 return 0; 524 out: 525 devvp->v_specmountpoint = NULL; 526 if (bp) 527 brelse(bp); 528 if (pribp) 529 brelse(pribp); 530 if (supbp) 531 brelse(supbp); 532 if (needclose) 533 (void)VOP_CLOSE(devvp, FREAD, NOCRED, p); 534 if (isomp) { 535 free((caddr_t)isomp, M_ISOFSMNT); 536 mp->mnt_data = (qaddr_t)0; 537 } 538 return error; 539 } 540 541 /* 542 * unmount system call 543 */ 544 static int 545 cd9660_unmount(mp, mntflags, p) 546 struct mount *mp; 547 int mntflags; 548 struct proc *p; 549 { 550 register struct iso_mnt *isomp; 551 int error, flags = 0; 552 553 if (mntflags & MNT_FORCE) 554 flags |= FORCECLOSE; 555 #if 0 556 mntflushbuf(mp, 0); 557 if (mntinvalbuf(mp)) 558 return EBUSY; 559 #endif 560 if ((error = vflush(mp, 0, flags))) 561 return (error); 562 563 isomp = VFSTOISOFS(mp); 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 static 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 * Get file system statistics. 597 */ 598 int 599 cd9660_statfs(mp, sbp, p) 600 struct mount *mp; 601 register struct statfs *sbp; 602 struct proc *p; 603 { 604 register struct iso_mnt *isomp; 605 606 isomp = VFSTOISOFS(mp); 607 608 sbp->f_bsize = isomp->logical_block_size; 609 sbp->f_iosize = sbp->f_bsize; /* XXX */ 610 sbp->f_blocks = isomp->volume_space_size; 611 sbp->f_bfree = 0; /* total free blocks */ 612 sbp->f_bavail = 0; /* blocks free for non superuser */ 613 sbp->f_files = 0; /* total files */ 614 sbp->f_ffree = 0; /* free file nodes */ 615 if (sbp != &mp->mnt_stat) { 616 sbp->f_type = mp->mnt_vfc->vfc_typenum; 617 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 618 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 619 } 620 return 0; 621 } 622 623 /* 624 * File handle to vnode 625 * 626 * Have to be really careful about stale file handles: 627 * - check that the inode number is in range 628 * - call iget() to get the locked inode 629 * - check for an unallocated inode (i_mode == 0) 630 * - check that the generation number matches 631 */ 632 633 struct ifid { 634 ushort ifid_len; 635 ushort ifid_pad; 636 int ifid_ino; 637 long ifid_start; 638 }; 639 640 /* ARGSUSED */ 641 int 642 cd9660_fhtovp(mp, fhp, vpp) 643 register struct mount *mp; 644 struct fid *fhp; 645 struct vnode **vpp; 646 { 647 struct ifid *ifhp = (struct ifid *)fhp; 648 register struct iso_node *ip; 649 struct vnode *nvp; 650 int error; 651 652 #ifdef ISOFS_DBG 653 printf("fhtovp: ino %d, start %ld\n", 654 ifhp->ifid_ino, ifhp->ifid_start); 655 #endif 656 657 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 658 *vpp = NULLVP; 659 return (error); 660 } 661 ip = VTOI(nvp); 662 if (ip->inode.iso_mode == 0) { 663 vput(nvp); 664 *vpp = NULLVP; 665 return (ESTALE); 666 } 667 *vpp = nvp; 668 return (0); 669 } 670 671 int 672 cd9660_checkexp(mp, nam, exflagsp, credanonp) 673 struct mount *mp; 674 struct sockaddr *nam; 675 int *exflagsp; 676 struct ucred **credanonp; 677 { 678 register struct netcred *np; 679 register struct iso_mnt *imp; 680 681 imp = VFSTOISOFS(mp); 682 683 /* 684 * Get the export permission structure for this <mp, client> tuple. 685 */ 686 np = vfs_export_lookup(mp, &imp->im_export, nam); 687 if (np == NULL) 688 return (EACCES); 689 690 *exflagsp = np->netc_exflags; 691 *credanonp = &np->netc_anon; 692 return (0); 693 } 694 695 int 696 cd9660_vget(mp, ino, vpp) 697 struct mount *mp; 698 ino_t ino; 699 struct vnode **vpp; 700 { 701 702 /* 703 * XXXX 704 * It would be nice if we didn't always set the `relocated' flag 705 * and force the extra read, but I don't want to think about fixing 706 * that right now. 707 */ 708 return (cd9660_vget_internal(mp, ino, vpp, 709 #if 0 710 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 711 #else 712 0, 713 #endif 714 (struct iso_directory_record *)0)); 715 } 716 717 int 718 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 719 struct mount *mp; 720 ino_t ino; 721 struct vnode **vpp; 722 int relocated; 723 struct iso_directory_record *isodir; 724 { 725 struct iso_mnt *imp; 726 struct iso_node *ip; 727 struct buf *bp; 728 struct vnode *vp; 729 dev_t dev; 730 int error; 731 732 imp = VFSTOISOFS(mp); 733 dev = imp->im_dev; 734 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 735 return (0); 736 737 /* Allocate a new vnode/iso_node. */ 738 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 739 *vpp = NULLVP; 740 return (error); 741 } 742 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 743 M_WAITOK); 744 bzero((caddr_t)ip, sizeof(struct iso_node)); 745 lockinit(&ip->i_lock, PINOD, "isonode", 0, 0); 746 vp->v_data = ip; 747 ip->i_vnode = vp; 748 ip->i_dev = dev; 749 ip->i_number = ino; 750 751 /* 752 * Put it onto its hash chain and lock it so that other requests for 753 * this inode will block if they arrive while we are sleeping waiting 754 * for old data structures to be purged or for the contents of the 755 * disk portion of this inode to be read. 756 */ 757 cd9660_ihashins(ip); 758 759 if (isodir == 0) { 760 int lbn, off; 761 762 lbn = lblkno(imp, ino); 763 if (lbn >= imp->volume_space_size) { 764 vput(vp); 765 printf("fhtovp: lbn exceed volume space %d\n", lbn); 766 return (ESTALE); 767 } 768 769 off = blkoff(imp, ino); 770 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 771 vput(vp); 772 printf("fhtovp: crosses block boundary %d\n", 773 off + ISO_DIRECTORY_RECORD_SIZE); 774 return (ESTALE); 775 } 776 777 error = bread(imp->im_devvp, 778 lbn << (imp->im_bshift - DEV_BSHIFT), 779 imp->logical_block_size, NOCRED, &bp); 780 if (error) { 781 vput(vp); 782 brelse(bp); 783 printf("fhtovp: bread error %d\n",error); 784 return (error); 785 } 786 isodir = (struct iso_directory_record *)(bp->b_data + off); 787 788 if (off + isonum_711(isodir->length) > 789 imp->logical_block_size) { 790 vput(vp); 791 if (bp != 0) 792 brelse(bp); 793 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 794 off +isonum_711(isodir->length), off, 795 isonum_711(isodir->length)); 796 return (ESTALE); 797 } 798 799 #if 0 800 if (isonum_733(isodir->extent) + 801 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 802 if (bp != 0) 803 brelse(bp); 804 printf("fhtovp: file start miss %d vs %d\n", 805 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 806 ifhp->ifid_start); 807 return (ESTALE); 808 } 809 #endif 810 } else 811 bp = 0; 812 813 ip->i_mnt = imp; 814 ip->i_devvp = imp->im_devvp; 815 VREF(ip->i_devvp); 816 817 if (relocated) { 818 /* 819 * On relocated directories we must 820 * read the `.' entry out of a dir. 821 */ 822 ip->iso_start = ino >> imp->im_bshift; 823 if (bp != 0) 824 brelse(bp); 825 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 826 vput(vp); 827 return (error); 828 } 829 isodir = (struct iso_directory_record *)bp->b_data; 830 } 831 832 ip->iso_extent = isonum_733(isodir->extent); 833 ip->i_size = isonum_733(isodir->size); 834 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 835 836 /* 837 * Setup time stamp, attribute 838 */ 839 vp->v_type = VNON; 840 switch (imp->iso_ftype) { 841 default: /* ISO_FTYPE_9660 */ 842 { 843 struct buf *bp2; 844 int off; 845 if ((imp->im_flags & ISOFSMNT_EXTATT) 846 && (off = isonum_711(isodir->ext_attr_length))) 847 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 848 &bp2); 849 else 850 bp2 = NULL; 851 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 852 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 853 if (bp2) 854 brelse(bp2); 855 break; 856 } 857 case ISO_FTYPE_RRIP: 858 cd9660_rrip_analyze(isodir, ip, imp); 859 break; 860 } 861 862 if (bp != 0) 863 brelse(bp); 864 865 /* 866 * Initialize the associated vnode 867 */ 868 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 869 case VFIFO: 870 vp->v_op = cd9660_fifoop_p; 871 break; 872 case VCHR: 873 case VBLK: 874 vp->v_op = cd9660_specop_p; 875 addaliasu(vp, ip->inode.iso_rdev); 876 break; 877 default: 878 break; 879 } 880 881 if (ip->iso_extent == imp->root_extent) 882 vp->v_flag |= VROOT; 883 884 /* 885 * XXX need generation number? 886 */ 887 888 *vpp = vp; 889 return (0); 890 } 891 892 /* 893 * Vnode pointer to File handle 894 */ 895 /* ARGSUSED */ 896 int 897 cd9660_vptofh(vp, fhp) 898 struct vnode *vp; 899 struct fid *fhp; 900 { 901 register struct iso_node *ip = VTOI(vp); 902 register struct ifid *ifhp; 903 904 ifhp = (struct ifid *)fhp; 905 ifhp->ifid_len = sizeof(struct ifid); 906 907 ifhp->ifid_ino = ip->i_number; 908 ifhp->ifid_start = ip->iso_start; 909 910 #ifdef ISOFS_DBG 911 printf("vptofh: ino %d, start %ld\n", 912 ifhp->ifid_ino,ifhp->ifid_start); 913 #endif 914 return 0; 915 } 916