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 1.9 2003/08/07 21:17:41 dillon Exp $ 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/proc.h> 46 #include <sys/namei.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 "iso.h" 61 #include "iso_rrip.h" 62 #include "cd9660_node.h" 63 #include "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 thread *)); 70 static int cd9660_unmount __P((struct mount *, int, struct thread *)); 71 static int cd9660_root __P((struct mount *, struct vnode **)); 72 static int cd9660_statfs __P((struct mount *, struct statfs *, struct thread *)); 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 thread *td)); 104 static int iso_mountfs __P((struct vnode *devvp, struct mount *mp, 105 struct thread *td, 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_t dev, struct thread *td) 114 { 115 struct ioc_toc_header h; 116 struct ioc_read_toc_single_entry t; 117 int i; 118 119 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0) 120 return 0; 121 122 for (i = h.ending_track; i >= 0; i--) { 123 t.address_format = CD_LBA_FORMAT; 124 t.track = i; 125 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) { 126 return 0; 127 } 128 if ((t.entry.control & 4) != 0) 129 /* found a data track */ 130 break; 131 } 132 133 if (i < 0) 134 return 0; 135 136 return ntohl(t.entry.addr.lba); 137 } 138 139 static int iso_mountroot __P((struct mount *mp, struct thread *td)); 140 141 static int 142 iso_mountroot(struct mount *mp, struct thread *td) 143 { 144 struct iso_args args; 145 int error; 146 147 if ((error = bdevvp(rootdev, &rootvp))) { 148 printf("iso_mountroot: can't find rootvp\n"); 149 return (error); 150 } 151 args.flags = ISOFSMNT_ROOT; 152 153 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td); 154 error = VOP_OPEN(rootvp, FREAD, FSCRED, td); 155 VOP_UNLOCK(rootvp, 0, td); 156 if (error) 157 return (error); 158 159 args.ssector = iso_get_ssector(rootdev, td); 160 161 (void)VOP_CLOSE(rootvp, FREAD, td); 162 163 if (bootverbose) 164 printf("iso_mountroot(): using session at block %d\n", 165 args.ssector); 166 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0) 167 return (error); 168 169 (void)cd9660_statfs(mp, &mp->mnt_stat, td); 170 return (0); 171 } 172 173 /* 174 * VFS Operations. 175 * 176 * mount system call 177 */ 178 static int 179 cd9660_mount(mp, path, data, ndp, td) 180 struct mount *mp; 181 char *path; 182 caddr_t data; 183 struct nameidata *ndp; 184 struct thread *td; 185 { 186 struct vnode *devvp; 187 struct iso_args args; 188 size_t size; 189 int error; 190 mode_t accessmode; 191 struct iso_mnt *imp = 0; 192 193 if ((mp->mnt_flag & MNT_ROOTFS) != 0) { 194 return (iso_mountroot(mp, td)); 195 } 196 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 197 return (error); 198 199 if ((mp->mnt_flag & MNT_RDONLY) == 0) 200 return (EROFS); 201 202 KKASSERT(td->td_proc); 203 204 /* 205 * If updating, check whether changing from read-only to 206 * read/write; if there is no device name, that's all we do. 207 */ 208 if (mp->mnt_flag & MNT_UPDATE) { 209 imp = VFSTOISOFS(mp); 210 if (args.fspec == 0) 211 return (vfs_export(mp, &imp->im_export, &args.export)); 212 } 213 /* 214 * Not an update, or updating the name: look up the name 215 * and verify that it refers to a sensible block device. 216 */ 217 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td); 218 if ((error = namei(ndp))) 219 return (error); 220 NDFREE(ndp, NDF_ONLY_PNBUF); 221 devvp = ndp->ni_vp; 222 223 if (!vn_isdisk(devvp, &error)) { 224 vrele(devvp); 225 return (error); 226 } 227 228 /* 229 * Verify that user has necessary permissions on the device, 230 * or has superuser abilities 231 */ 232 accessmode = VREAD; 233 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 234 error = VOP_ACCESS(devvp, accessmode, td->td_proc->p_ucred, td); 235 if (error) 236 error = suser(td); 237 if (error) { 238 vput(devvp); 239 return (error); 240 } 241 VOP_UNLOCK(devvp, 0, td); 242 243 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 244 error = iso_mountfs(devvp, mp, td, &args); 245 } else { 246 if (devvp != imp->im_devvp) 247 error = EINVAL; /* needs translation */ 248 else 249 vrele(devvp); 250 } 251 if (error) { 252 vrele(devvp); 253 return error; 254 } 255 imp = VFSTOISOFS(mp); 256 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 257 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 258 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 259 &size); 260 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 261 (void) cd9660_statfs(mp, &mp->mnt_stat, td); 262 return 0; 263 } 264 265 /* 266 * Common code for mount and mountroot 267 */ 268 static int 269 iso_mountfs( 270 struct vnode *devvp, 271 struct mount *mp, 272 struct thread *td, 273 struct iso_args *argp 274 ) { 275 struct iso_mnt *isomp = (struct iso_mnt *)0; 276 struct buf *bp = NULL; 277 struct buf *pribp = NULL, *supbp = NULL; 278 dev_t dev = devvp->v_rdev; 279 int error = EINVAL; 280 int needclose = 0; 281 int high_sierra = 0; 282 int iso_bsize; 283 int iso_blknum; 284 int joliet_level; 285 struct iso_volume_descriptor *vdp = 0; 286 struct iso_primary_descriptor *pri = NULL; 287 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 288 struct iso_supplementary_descriptor *sup = NULL; 289 struct iso_directory_record *rootp; 290 int logical_block_size; 291 292 if (!(mp->mnt_flag & MNT_RDONLY)) 293 return EROFS; 294 295 /* 296 * Disallow multiple mounts of the same device. 297 * Disallow mounting of a device that is currently in use 298 * (except for root, which might share swap device for miniroot). 299 * Flush out any old buffers remaining from a previous use. 300 */ 301 if ((error = vfs_mountedon(devvp))) 302 return error; 303 if (vcount(devvp) > 1 && devvp != rootvp) 304 return EBUSY; 305 if ((error = vinvalbuf(devvp, V_SAVE, td, 0, 0))) 306 return (error); 307 308 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 309 error = VOP_OPEN(devvp, FREAD, FSCRED, td); 310 VOP_UNLOCK(devvp, 0, td); 311 if (error) 312 return error; 313 if (devvp->v_rdev->si_iosize_max != 0) 314 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 315 if (mp->mnt_iosize_max > MAXPHYS) 316 mp->mnt_iosize_max = MAXPHYS; 317 318 needclose = 1; 319 320 /* This is the "logical sector size". The standard says this 321 * should be 2048 or the physical sector size on the device, 322 * whichever is greater. For now, we'll just use a constant. 323 */ 324 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 325 326 joliet_level = 0; 327 for (iso_blknum = 16 + argp->ssector; 328 iso_blknum < 100 + argp->ssector; 329 iso_blknum++) { 330 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 331 iso_bsize, &bp)) != 0) 332 goto out; 333 334 vdp = (struct iso_volume_descriptor *)bp->b_data; 335 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 336 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 337 sizeof vdp->id) != 0) { 338 error = EINVAL; 339 goto out; 340 } else 341 high_sierra = 1; 342 } 343 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 344 case ISO_VD_PRIMARY: 345 if (pribp == NULL) { 346 pribp = bp; 347 bp = NULL; 348 pri = (struct iso_primary_descriptor *)vdp; 349 pri_sierra = 350 (struct iso_sierra_primary_descriptor *)vdp; 351 } 352 break; 353 354 case ISO_VD_SUPPLEMENTARY: 355 if (supbp == NULL) { 356 supbp = bp; 357 bp = NULL; 358 sup = (struct iso_supplementary_descriptor *)vdp; 359 360 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 361 if (bcmp(sup->escape, "%/@", 3) == 0) 362 joliet_level = 1; 363 if (bcmp(sup->escape, "%/C", 3) == 0) 364 joliet_level = 2; 365 if (bcmp(sup->escape, "%/E", 3) == 0) 366 joliet_level = 3; 367 368 if ((isonum_711 (sup->flags) & 1) && 369 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 370 joliet_level = 0; 371 } 372 } 373 break; 374 375 case ISO_VD_END: 376 goto vd_end; 377 378 default: 379 break; 380 } 381 if (bp) { 382 brelse(bp); 383 bp = NULL; 384 } 385 } 386 vd_end: 387 if (bp) { 388 brelse(bp); 389 bp = NULL; 390 } 391 392 if (pri == NULL) { 393 error = EINVAL; 394 goto out; 395 } 396 397 logical_block_size = 398 isonum_723 (high_sierra? 399 pri_sierra->logical_block_size: 400 pri->logical_block_size); 401 402 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 403 || (logical_block_size & (logical_block_size - 1)) != 0) { 404 error = EINVAL; 405 goto out; 406 } 407 408 rootp = (struct iso_directory_record *) 409 (high_sierra? 410 pri_sierra->root_directory_record: 411 pri->root_directory_record); 412 413 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 414 bzero((caddr_t)isomp, sizeof *isomp); 415 isomp->logical_block_size = logical_block_size; 416 isomp->volume_space_size = 417 isonum_733 (high_sierra? 418 pri_sierra->volume_space_size: 419 pri->volume_space_size); 420 isomp->joliet_level = 0; 421 /* 422 * Since an ISO9660 multi-session CD can also access previous 423 * sessions, we have to include them into the space consider- 424 * ations. This doesn't yield a very accurate number since 425 * parts of the old sessions might be inaccessible now, but we 426 * can't do much better. This is also important for the NFS 427 * filehandle validation. 428 */ 429 isomp->volume_space_size += argp->ssector; 430 bcopy (rootp, isomp->root, sizeof isomp->root); 431 isomp->root_extent = isonum_733 (rootp->extent); 432 isomp->root_size = isonum_733 (rootp->size); 433 434 isomp->im_bmask = logical_block_size - 1; 435 isomp->im_bshift = ffs(logical_block_size) - 1; 436 437 pribp->b_flags |= B_AGE; 438 brelse(pribp); 439 pribp = NULL; 440 441 mp->mnt_data = (qaddr_t)isomp; 442 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 443 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 444 mp->mnt_maxsymlinklen = 0; 445 mp->mnt_flag |= MNT_LOCAL; 446 isomp->im_mountp = mp; 447 isomp->im_dev = dev; 448 isomp->im_devvp = devvp; 449 450 devvp->v_specmountpoint = mp; 451 452 /* Check the Rock Ridge Extention support */ 453 if (!(argp->flags & ISOFSMNT_NORRIP)) { 454 if ((error = bread(isomp->im_devvp, 455 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 456 (isomp->im_bshift - DEV_BSHIFT), 457 isomp->logical_block_size, &bp)) != 0) 458 goto out; 459 460 rootp = (struct iso_directory_record *)bp->b_data; 461 462 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 463 argp->flags |= ISOFSMNT_NORRIP; 464 } else { 465 argp->flags &= ~ISOFSMNT_GENS; 466 } 467 468 /* 469 * The contents are valid, 470 * but they will get reread as part of another vnode, so... 471 */ 472 bp->b_flags |= B_AGE; 473 brelse(bp); 474 bp = NULL; 475 } 476 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 477 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 478 479 if (high_sierra) { 480 /* this effectively ignores all the mount flags */ 481 log(LOG_INFO, "cd9660: High Sierra Format\n"); 482 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 483 } else 484 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 485 default: 486 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 487 break; 488 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 489 isomp->iso_ftype = ISO_FTYPE_9660; 490 break; 491 case 0: 492 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 493 isomp->iso_ftype = ISO_FTYPE_RRIP; 494 break; 495 } 496 497 /* Decide whether to use the Joliet descriptor */ 498 499 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 500 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 501 rootp = (struct iso_directory_record *) 502 sup->root_directory_record; 503 bcopy (rootp, isomp->root, sizeof isomp->root); 504 isomp->root_extent = isonum_733 (rootp->extent); 505 isomp->root_size = isonum_733 (rootp->size); 506 isomp->joliet_level = joliet_level; 507 supbp->b_flags |= B_AGE; 508 } 509 510 if (supbp) { 511 brelse(supbp); 512 supbp = NULL; 513 } 514 515 return 0; 516 out: 517 devvp->v_specmountpoint = NULL; 518 if (bp) 519 brelse(bp); 520 if (pribp) 521 brelse(pribp); 522 if (supbp) 523 brelse(supbp); 524 if (needclose) 525 (void)VOP_CLOSE(devvp, FREAD, td); 526 if (isomp) { 527 free((caddr_t)isomp, M_ISOFSMNT); 528 mp->mnt_data = (qaddr_t)0; 529 } 530 return error; 531 } 532 533 /* 534 * unmount system call 535 */ 536 static int 537 cd9660_unmount(struct mount *mp, int mntflags, struct thread *td) 538 { 539 struct iso_mnt *isomp; 540 int error, flags = 0; 541 542 if (mntflags & MNT_FORCE) 543 flags |= FORCECLOSE; 544 #if 0 545 mntflushbuf(mp, 0); 546 if (mntinvalbuf(mp)) 547 return EBUSY; 548 #endif 549 if ((error = vflush(mp, 0, flags))) 550 return (error); 551 552 isomp = VFSTOISOFS(mp); 553 554 isomp->im_devvp->v_specmountpoint = NULL; 555 error = VOP_CLOSE(isomp->im_devvp, FREAD, td); 556 vrele(isomp->im_devvp); 557 free((caddr_t)isomp, M_ISOFSMNT); 558 mp->mnt_data = (qaddr_t)0; 559 mp->mnt_flag &= ~MNT_LOCAL; 560 return (error); 561 } 562 563 /* 564 * Return root of a filesystem 565 */ 566 static int 567 cd9660_root(mp, vpp) 568 struct mount *mp; 569 struct vnode **vpp; 570 { 571 struct iso_mnt *imp = VFSTOISOFS(mp); 572 struct iso_directory_record *dp = 573 (struct iso_directory_record *)imp->root; 574 ino_t ino = isodirino(dp, imp); 575 576 /* 577 * With RRIP we must use the `.' entry of the root directory. 578 * Simply tell vget, that it's a relocated directory. 579 */ 580 return (cd9660_vget_internal(mp, ino, vpp, 581 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 582 } 583 584 /* 585 * Get file system statistics. 586 */ 587 int 588 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 589 { 590 struct iso_mnt *isomp; 591 592 isomp = VFSTOISOFS(mp); 593 594 sbp->f_bsize = isomp->logical_block_size; 595 sbp->f_iosize = sbp->f_bsize; /* XXX */ 596 sbp->f_blocks = isomp->volume_space_size; 597 sbp->f_bfree = 0; /* total free blocks */ 598 sbp->f_bavail = 0; /* blocks free for non superuser */ 599 sbp->f_files = 0; /* total files */ 600 sbp->f_ffree = 0; /* free file nodes */ 601 if (sbp != &mp->mnt_stat) { 602 sbp->f_type = mp->mnt_vfc->vfc_typenum; 603 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 604 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 605 } 606 return 0; 607 } 608 609 /* 610 * File handle to vnode 611 * 612 * Have to be really careful about stale file handles: 613 * - check that the inode number is in range 614 * - call iget() to get the locked inode 615 * - check for an unallocated inode (i_mode == 0) 616 * - check that the generation number matches 617 */ 618 619 struct ifid { 620 ushort ifid_len; 621 ushort ifid_pad; 622 int ifid_ino; 623 long ifid_start; 624 }; 625 626 /* ARGSUSED */ 627 int 628 cd9660_fhtovp(mp, fhp, vpp) 629 struct mount *mp; 630 struct fid *fhp; 631 struct vnode **vpp; 632 { 633 struct ifid *ifhp = (struct ifid *)fhp; 634 struct iso_node *ip; 635 struct vnode *nvp; 636 int error; 637 638 #ifdef ISOFS_DBG 639 printf("fhtovp: ino %d, start %ld\n", 640 ifhp->ifid_ino, ifhp->ifid_start); 641 #endif 642 643 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 644 *vpp = NULLVP; 645 return (error); 646 } 647 ip = VTOI(nvp); 648 if (ip->inode.iso_mode == 0) { 649 vput(nvp); 650 *vpp = NULLVP; 651 return (ESTALE); 652 } 653 *vpp = nvp; 654 return (0); 655 } 656 657 int 658 cd9660_checkexp(mp, nam, exflagsp, credanonp) 659 struct mount *mp; 660 struct sockaddr *nam; 661 int *exflagsp; 662 struct ucred **credanonp; 663 { 664 struct netcred *np; 665 struct iso_mnt *imp; 666 667 imp = VFSTOISOFS(mp); 668 669 /* 670 * Get the export permission structure for this <mp, client> tuple. 671 */ 672 np = vfs_export_lookup(mp, &imp->im_export, nam); 673 if (np == NULL) 674 return (EACCES); 675 676 *exflagsp = np->netc_exflags; 677 *credanonp = &np->netc_anon; 678 return (0); 679 } 680 681 int 682 cd9660_vget(mp, ino, vpp) 683 struct mount *mp; 684 ino_t ino; 685 struct vnode **vpp; 686 { 687 688 /* 689 * XXXX 690 * It would be nice if we didn't always set the `relocated' flag 691 * and force the extra read, but I don't want to think about fixing 692 * that right now. 693 */ 694 return (cd9660_vget_internal(mp, ino, vpp, 695 #if 0 696 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 697 #else 698 0, 699 #endif 700 (struct iso_directory_record *)0)); 701 } 702 703 int 704 cd9660_vget_internal(mp, ino, vpp, relocated, isodir) 705 struct mount *mp; 706 ino_t ino; 707 struct vnode **vpp; 708 int relocated; 709 struct iso_directory_record *isodir; 710 { 711 struct iso_mnt *imp; 712 struct iso_node *ip; 713 struct buf *bp; 714 struct vnode *vp; 715 dev_t dev; 716 int error; 717 718 imp = VFSTOISOFS(mp); 719 dev = imp->im_dev; 720 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 721 return (0); 722 723 /* Allocate a new vnode/iso_node. */ 724 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 725 *vpp = NULLVP; 726 return (error); 727 } 728 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 729 M_WAITOK); 730 bzero((caddr_t)ip, sizeof(struct iso_node)); 731 lockinit(&ip->i_lock, 0, "isonode", 0, 0); 732 vp->v_data = ip; 733 ip->i_vnode = vp; 734 ip->i_dev = dev; 735 ip->i_number = ino; 736 737 /* 738 * Put it onto its hash chain and lock it so that other requests for 739 * this inode will block if they arrive while we are sleeping waiting 740 * for old data structures to be purged or for the contents of the 741 * disk portion of this inode to be read. 742 */ 743 cd9660_ihashins(ip); 744 745 if (isodir == 0) { 746 int lbn, off; 747 748 lbn = lblkno(imp, ino); 749 if (lbn >= imp->volume_space_size) { 750 vput(vp); 751 printf("fhtovp: lbn exceed volume space %d\n", lbn); 752 return (ESTALE); 753 } 754 755 off = blkoff(imp, ino); 756 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 757 vput(vp); 758 printf("fhtovp: crosses block boundary %d\n", 759 off + ISO_DIRECTORY_RECORD_SIZE); 760 return (ESTALE); 761 } 762 763 error = bread(imp->im_devvp, 764 lbn << (imp->im_bshift - DEV_BSHIFT), 765 imp->logical_block_size, &bp); 766 if (error) { 767 vput(vp); 768 brelse(bp); 769 printf("fhtovp: bread error %d\n",error); 770 return (error); 771 } 772 isodir = (struct iso_directory_record *)(bp->b_data + off); 773 774 if (off + isonum_711(isodir->length) > 775 imp->logical_block_size) { 776 vput(vp); 777 if (bp != 0) 778 brelse(bp); 779 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 780 off +isonum_711(isodir->length), off, 781 isonum_711(isodir->length)); 782 return (ESTALE); 783 } 784 785 #if 0 786 if (isonum_733(isodir->extent) + 787 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 788 if (bp != 0) 789 brelse(bp); 790 printf("fhtovp: file start miss %d vs %d\n", 791 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 792 ifhp->ifid_start); 793 return (ESTALE); 794 } 795 #endif 796 } else 797 bp = 0; 798 799 ip->i_mnt = imp; 800 ip->i_devvp = imp->im_devvp; 801 VREF(ip->i_devvp); 802 803 if (relocated) { 804 /* 805 * On relocated directories we must 806 * read the `.' entry out of a dir. 807 */ 808 ip->iso_start = ino >> imp->im_bshift; 809 if (bp != 0) 810 brelse(bp); 811 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 812 vput(vp); 813 return (error); 814 } 815 isodir = (struct iso_directory_record *)bp->b_data; 816 } 817 818 ip->iso_extent = isonum_733(isodir->extent); 819 ip->i_size = isonum_733(isodir->size); 820 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 821 822 /* 823 * Setup time stamp, attribute 824 */ 825 vp->v_type = VNON; 826 switch (imp->iso_ftype) { 827 default: /* ISO_FTYPE_9660 */ 828 { 829 struct buf *bp2; 830 int off; 831 if ((imp->im_flags & ISOFSMNT_EXTATT) 832 && (off = isonum_711(isodir->ext_attr_length))) 833 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 834 &bp2); 835 else 836 bp2 = NULL; 837 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 838 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 839 if (bp2) 840 brelse(bp2); 841 break; 842 } 843 case ISO_FTYPE_RRIP: 844 cd9660_rrip_analyze(isodir, ip, imp); 845 break; 846 } 847 848 if (bp != 0) 849 brelse(bp); 850 851 /* 852 * Initialize the associated vnode 853 */ 854 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 855 case VFIFO: 856 vp->v_op = cd9660_fifoop_p; 857 break; 858 case VCHR: 859 case VBLK: 860 vp->v_op = cd9660_specop_p; 861 addaliasu(vp, ip->inode.iso_rdev); 862 break; 863 default: 864 break; 865 } 866 867 if (ip->iso_extent == imp->root_extent) 868 vp->v_flag |= VROOT; 869 870 /* 871 * XXX need generation number? 872 */ 873 874 *vpp = vp; 875 return (0); 876 } 877 878 /* 879 * Vnode pointer to File handle 880 */ 881 /* ARGSUSED */ 882 int 883 cd9660_vptofh(vp, fhp) 884 struct vnode *vp; 885 struct fid *fhp; 886 { 887 struct iso_node *ip = VTOI(vp); 888 struct ifid *ifhp; 889 890 ifhp = (struct ifid *)fhp; 891 ifhp->ifid_len = sizeof(struct ifid); 892 893 ifhp->ifid_ino = ip->i_number; 894 ifhp->ifid_start = ip->iso_start; 895 896 #ifdef ISOFS_DBG 897 printf("vptofh: ino %d, start %ld\n", 898 ifhp->ifid_ino,ifhp->ifid_start); 899 #endif 900 return 0; 901 } 902