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 1.26 2005/04/08 03:16:18 dillon Exp $ 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/proc.h> 46 #include <sys/nlookup.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 extern struct vnodeopv_entry_desc cd9660_vnodeop_entries[]; 66 extern struct vnodeopv_entry_desc cd9660_specop_entries[]; 67 extern struct vnodeopv_entry_desc cd9660_fifoop_entries[]; 68 69 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 70 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part"); 71 72 static int cd9660_mount (struct mount *, char *, caddr_t, struct thread *); 73 static int cd9660_unmount (struct mount *, int, struct thread *); 74 static int cd9660_root (struct mount *, struct vnode **); 75 static int cd9660_statfs (struct mount *, struct statfs *, struct thread *); 76 static int cd9660_vget (struct mount *, ino_t, struct vnode **); 77 static int cd9660_fhtovp (struct mount *, struct fid *, struct vnode **); 78 static int cd9660_checkexp (struct mount *, struct sockaddr *, 79 int *, struct ucred **); 80 static int cd9660_vptofh (struct vnode *, struct fid *); 81 82 static struct vfsops cd9660_vfsops = { 83 cd9660_mount, 84 vfs_stdstart, 85 cd9660_unmount, 86 cd9660_root, 87 vfs_stdquotactl, 88 cd9660_statfs, 89 vfs_stdsync, 90 cd9660_vget, 91 cd9660_fhtovp, 92 cd9660_checkexp, 93 cd9660_vptofh, 94 cd9660_init, 95 cd9660_uninit, 96 vfs_stdextattrctl, 97 }; 98 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 99 MODULE_VERSION(cd9660, 1); 100 101 102 /* 103 * Called by vfs_mountroot when iso is going to be mounted as root. 104 */ 105 106 static int iso_get_ssector (dev_t dev, struct thread *td); 107 static int iso_mountfs (struct vnode *devvp, struct mount *mp, 108 struct thread *td, struct iso_args *argp); 109 110 /* 111 * Try to find the start of the last data track on this CD-ROM. This 112 * is used to mount the last session of a multi-session CD. Bail out 113 * and return 0 if we fail, this is always a safe bet. 114 */ 115 static int 116 iso_get_ssector(dev_t dev, struct thread *td) 117 { 118 struct ioc_toc_header h; 119 struct ioc_read_toc_single_entry t; 120 int i; 121 122 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0) 123 return 0; 124 125 for (i = h.ending_track; i >= 0; i--) { 126 t.address_format = CD_LBA_FORMAT; 127 t.track = i; 128 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) { 129 return 0; 130 } 131 if ((t.entry.control & 4) != 0) 132 /* found a data track */ 133 break; 134 } 135 136 if (i < 0) 137 return 0; 138 139 return ntohl(t.entry.addr.lba); 140 } 141 142 static int iso_mountroot (struct mount *mp, struct thread *td); 143 144 static int 145 iso_mountroot(struct mount *mp, struct thread *td) 146 { 147 struct iso_args args; 148 struct vnode *rootvp; 149 int error; 150 151 if ((error = bdevvp(rootdev, &rootvp))) { 152 printf("iso_mountroot: can't find rootvp\n"); 153 return (error); 154 } 155 args.flags = ISOFSMNT_ROOT; 156 157 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td); 158 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL, td); 159 VOP_UNLOCK(rootvp, 0, td); 160 if (error) 161 return (error); 162 163 args.ssector = iso_get_ssector(rootdev, td); 164 165 (void)VOP_CLOSE(rootvp, FREAD, td); 166 167 if (bootverbose) 168 printf("iso_mountroot(): using session at block %d\n", 169 args.ssector); 170 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0) 171 return (error); 172 173 (void)cd9660_statfs(mp, &mp->mnt_stat, td); 174 return (0); 175 } 176 177 /* 178 * VFS Operations. 179 * 180 * mount system call 181 */ 182 static int 183 cd9660_mount(struct mount *mp, char *path, caddr_t data, struct thread *td) 184 { 185 struct vnode *devvp; 186 struct iso_args args; 187 size_t size; 188 int error; 189 mode_t accessmode; 190 struct iso_mnt *imp = 0; 191 struct nlookupdata nd; 192 193 if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) { 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 devvp = NULL; 218 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW); 219 if (error == 0) 220 error = nlookup(&nd); 221 if (error == 0) 222 error = cache_vref(nd.nl_ncp, nd.nl_cred, &devvp); 223 nlookup_done(&nd); 224 if (error) 225 return (error); 226 227 if (!vn_isdisk(devvp, &error)) { 228 vrele(devvp); 229 return (error); 230 } 231 232 /* 233 * Verify that user has necessary permissions on the device, 234 * or has superuser abilities 235 */ 236 accessmode = VREAD; 237 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 238 error = VOP_ACCESS(devvp, accessmode, td->td_proc->p_ucred, td); 239 if (error) 240 error = suser(td); 241 if (error) { 242 vput(devvp); 243 return (error); 244 } 245 VOP_UNLOCK(devvp, 0, td); 246 247 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 248 error = iso_mountfs(devvp, mp, td, &args); 249 } else { 250 if (devvp != imp->im_devvp) 251 error = EINVAL; /* needs translation */ 252 else 253 vrele(devvp); 254 } 255 if (error) { 256 vrele(devvp); 257 return error; 258 } 259 imp = VFSTOISOFS(mp); 260 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 261 &size); 262 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 263 (void) cd9660_statfs(mp, &mp->mnt_stat, td); 264 return 0; 265 } 266 267 /* 268 * Common code for mount and mountroot 269 */ 270 static int 271 iso_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td, 272 struct iso_args *argp) 273 { 274 struct iso_mnt *isomp = NULL; 275 struct buf *bp = NULL; 276 struct buf *pribp = NULL, *supbp = NULL; 277 dev_t dev; 278 int error = EINVAL; 279 int needclose = 0; 280 int high_sierra = 0; 281 int iso_bsize; 282 int iso_blknum; 283 int joliet_level; 284 struct iso_volume_descriptor *vdp = 0; 285 struct iso_primary_descriptor *pri = NULL; 286 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 287 struct iso_supplementary_descriptor *sup = NULL; 288 struct iso_directory_record *rootp; 289 int logical_block_size; 290 291 if (!(mp->mnt_flag & MNT_RDONLY)) 292 return EROFS; 293 294 /* 295 * Disallow multiple mounts of the same device. 296 * Disallow mounting of a device that is currently in use 297 * Flush out any old buffers remaining from a previous use. 298 */ 299 if ((error = vfs_mountedon(devvp))) 300 return error; 301 if (count_udev(devvp->v_udev) > 0) 302 return EBUSY; 303 if ((error = vinvalbuf(devvp, V_SAVE, td, 0, 0))) 304 return (error); 305 306 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 307 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL, td); 308 VOP_UNLOCK(devvp, 0, td); 309 if (error) 310 return error; 311 dev = devvp->v_rdev; 312 if (dev->si_iosize_max != 0) 313 mp->mnt_iosize_max = dev->si_iosize_max; 314 if (mp->mnt_iosize_max > MAXPHYS) 315 mp->mnt_iosize_max = MAXPHYS; 316 317 needclose = 1; 318 319 /* This is the "logical sector size". The standard says this 320 * should be 2048 or the physical sector size on the device, 321 * whichever is greater. For now, we'll just use a constant. 322 */ 323 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 324 325 joliet_level = 0; 326 for (iso_blknum = 16 + argp->ssector; 327 iso_blknum < 100 + argp->ssector; 328 iso_blknum++) { 329 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 330 iso_bsize, &bp)) != 0) 331 goto out; 332 333 vdp = (struct iso_volume_descriptor *)bp->b_data; 334 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 335 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 336 sizeof vdp->id) != 0) { 337 error = EINVAL; 338 goto out; 339 } else 340 high_sierra = 1; 341 } 342 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 343 case ISO_VD_PRIMARY: 344 if (pribp == NULL) { 345 pribp = bp; 346 bp = NULL; 347 pri = (struct iso_primary_descriptor *)vdp; 348 pri_sierra = 349 (struct iso_sierra_primary_descriptor *)vdp; 350 } 351 break; 352 353 case ISO_VD_SUPPLEMENTARY: 354 if (supbp == NULL) { 355 supbp = bp; 356 bp = NULL; 357 sup = (struct iso_supplementary_descriptor *)vdp; 358 359 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 360 if (bcmp(sup->escape, "%/@", 3) == 0) 361 joliet_level = 1; 362 if (bcmp(sup->escape, "%/C", 3) == 0) 363 joliet_level = 2; 364 if (bcmp(sup->escape, "%/E", 3) == 0) 365 joliet_level = 3; 366 367 if ((isonum_711 (sup->flags) & 1) && 368 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 369 joliet_level = 0; 370 } 371 } 372 break; 373 374 case ISO_VD_END: 375 goto vd_end; 376 377 default: 378 break; 379 } 380 if (bp) { 381 brelse(bp); 382 bp = NULL; 383 } 384 } 385 vd_end: 386 if (bp) { 387 brelse(bp); 388 bp = NULL; 389 } 390 391 if (pri == NULL) { 392 error = EINVAL; 393 goto out; 394 } 395 396 logical_block_size = 397 isonum_723 (high_sierra? 398 pri_sierra->logical_block_size: 399 pri->logical_block_size); 400 401 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 402 || (logical_block_size & (logical_block_size - 1)) != 0) { 403 error = EINVAL; 404 goto out; 405 } 406 407 rootp = (struct iso_directory_record *) 408 (high_sierra? 409 pri_sierra->root_directory_record: 410 pri->root_directory_record); 411 412 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 413 isomp->logical_block_size = logical_block_size; 414 isomp->volume_space_size = 415 isonum_733 (high_sierra? 416 pri_sierra->volume_space_size: 417 pri->volume_space_size); 418 isomp->joliet_level = 0; 419 /* 420 * Since an ISO9660 multi-session CD can also access previous 421 * sessions, we have to include them into the space consider- 422 * ations. This doesn't yield a very accurate number since 423 * parts of the old sessions might be inaccessible now, but we 424 * can't do much better. This is also important for the NFS 425 * filehandle validation. 426 */ 427 isomp->volume_space_size += argp->ssector; 428 bcopy (rootp, isomp->root, sizeof isomp->root); 429 isomp->root_extent = isonum_733 (rootp->extent); 430 isomp->root_size = isonum_733 (rootp->size); 431 432 isomp->im_bmask = logical_block_size - 1; 433 isomp->im_bshift = ffs(logical_block_size) - 1; 434 435 pribp->b_flags |= B_AGE; 436 brelse(pribp); 437 pribp = NULL; 438 439 mp->mnt_data = (qaddr_t)isomp; 440 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 441 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 442 mp->mnt_maxsymlinklen = 0; 443 mp->mnt_flag |= MNT_LOCAL; 444 isomp->im_mountp = mp; 445 isomp->im_dev = dev; 446 isomp->im_devvp = devvp; 447 448 dev->si_mountpoint = mp; 449 450 /* Check the Rock Ridge Extention support */ 451 if (!(argp->flags & ISOFSMNT_NORRIP)) { 452 if ((error = bread(isomp->im_devvp, 453 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 454 (isomp->im_bshift - DEV_BSHIFT), 455 isomp->logical_block_size, &bp)) != 0) 456 goto out; 457 458 rootp = (struct iso_directory_record *)bp->b_data; 459 460 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 461 argp->flags |= ISOFSMNT_NORRIP; 462 } else { 463 argp->flags &= ~ISOFSMNT_GENS; 464 } 465 466 /* 467 * The contents are valid, 468 * but they will get reread as part of another vnode, so... 469 */ 470 bp->b_flags |= B_AGE; 471 brelse(bp); 472 bp = NULL; 473 } 474 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 475 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 476 477 if (high_sierra) { 478 /* this effectively ignores all the mount flags */ 479 log(LOG_INFO, "cd9660: High Sierra Format\n"); 480 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 481 } else { 482 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 483 default: 484 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 485 break; 486 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 487 isomp->iso_ftype = ISO_FTYPE_9660; 488 break; 489 case 0: 490 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 491 isomp->iso_ftype = ISO_FTYPE_RRIP; 492 break; 493 } 494 } 495 496 /* Decide whether to use the Joliet descriptor */ 497 498 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 499 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 500 rootp = (struct iso_directory_record *) 501 sup->root_directory_record; 502 bcopy (rootp, isomp->root, sizeof isomp->root); 503 isomp->root_extent = isonum_733 (rootp->extent); 504 isomp->root_size = isonum_733 (rootp->size); 505 isomp->joliet_level = joliet_level; 506 supbp->b_flags |= B_AGE; 507 } 508 509 if (supbp) { 510 brelse(supbp); 511 supbp = NULL; 512 } 513 514 vfs_add_vnodeops(mp, &mp->mnt_vn_norm_ops, cd9660_vnodeop_entries); 515 vfs_add_vnodeops(mp, &mp->mnt_vn_spec_ops, cd9660_specop_entries); 516 vfs_add_vnodeops(mp, &mp->mnt_vn_fifo_ops, cd9660_fifoop_entries); 517 518 return 0; 519 out: 520 dev->si_mountpoint = NULL; 521 if (bp) 522 brelse(bp); 523 if (pribp) 524 brelse(pribp); 525 if (supbp) 526 brelse(supbp); 527 if (needclose) 528 (void)VOP_CLOSE(devvp, FREAD, td); 529 if (isomp) { 530 free((caddr_t)isomp, M_ISOFSMNT); 531 mp->mnt_data = (qaddr_t)0; 532 } 533 return error; 534 } 535 536 /* 537 * unmount system call 538 */ 539 static int 540 cd9660_unmount(struct mount *mp, int mntflags, struct thread *td) 541 { 542 struct iso_mnt *isomp; 543 int error, flags = 0; 544 545 if (mntflags & MNT_FORCE) 546 flags |= FORCECLOSE; 547 #if 0 548 mntflushbuf(mp, 0); 549 if (mntinvalbuf(mp)) 550 return EBUSY; 551 #endif 552 if ((error = vflush(mp, 0, flags))) 553 return (error); 554 555 isomp = VFSTOISOFS(mp); 556 557 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 558 error = VOP_CLOSE(isomp->im_devvp, FREAD, td); 559 vrele(isomp->im_devvp); 560 free((caddr_t)isomp, M_ISOFSMNT); 561 mp->mnt_data = (qaddr_t)0; 562 mp->mnt_flag &= ~MNT_LOCAL; 563 return (error); 564 } 565 566 /* 567 * Return root of a filesystem 568 */ 569 static int 570 cd9660_root(struct mount *mp, struct vnode **vpp) 571 { 572 struct iso_mnt *imp = VFSTOISOFS(mp); 573 struct iso_directory_record *dp = 574 (struct iso_directory_record *)imp->root; 575 ino_t ino = isodirino(dp, imp); 576 577 /* 578 * With RRIP we must use the `.' entry of the root directory. 579 * Simply tell vget, that it's a relocated directory. 580 */ 581 return (cd9660_vget_internal(mp, ino, vpp, 582 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 583 } 584 585 /* 586 * Get file system statistics. 587 */ 588 int 589 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 590 { 591 struct iso_mnt *isomp; 592 593 isomp = VFSTOISOFS(mp); 594 595 sbp->f_bsize = isomp->logical_block_size; 596 sbp->f_iosize = sbp->f_bsize; /* XXX */ 597 sbp->f_blocks = isomp->volume_space_size; 598 sbp->f_bfree = 0; /* total free blocks */ 599 sbp->f_bavail = 0; /* blocks free for non superuser */ 600 sbp->f_files = 0; /* total files */ 601 sbp->f_ffree = 0; /* free file nodes */ 602 if (sbp != &mp->mnt_stat) { 603 sbp->f_type = mp->mnt_vfc->vfc_typenum; 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(struct mount *mp, struct fid *fhp, struct vnode **vpp) 629 { 630 struct ifid *ifhp = (struct ifid *)fhp; 631 struct iso_node *ip; 632 struct vnode *nvp; 633 int error; 634 635 #ifdef ISOFS_DBG 636 printf("fhtovp: ino %d, start %ld\n", 637 ifhp->ifid_ino, ifhp->ifid_start); 638 #endif 639 640 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 641 *vpp = NULLVP; 642 return (error); 643 } 644 ip = VTOI(nvp); 645 if (ip->inode.iso_mode == 0) { 646 vput(nvp); 647 *vpp = NULLVP; 648 return (ESTALE); 649 } 650 *vpp = nvp; 651 return (0); 652 } 653 654 int 655 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp, 656 struct ucred **credanonp) 657 { 658 struct netcred *np; 659 struct iso_mnt *imp; 660 661 imp = VFSTOISOFS(mp); 662 663 /* 664 * Get the export permission structure for this <mp, client> tuple. 665 */ 666 np = vfs_export_lookup(mp, &imp->im_export, nam); 667 if (np == NULL) 668 return (EACCES); 669 670 *exflagsp = np->netc_exflags; 671 *credanonp = &np->netc_anon; 672 return (0); 673 } 674 675 int 676 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 677 { 678 679 /* 680 * XXXX 681 * It would be nice if we didn't always set the `relocated' flag 682 * and force the extra read, but I don't want to think about fixing 683 * that right now. 684 */ 685 return (cd9660_vget_internal(mp, ino, vpp, 686 #if 0 687 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 688 #else 689 0, 690 #endif 691 (struct iso_directory_record *)0)); 692 } 693 694 int 695 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 696 int relocated, struct iso_directory_record *isodir) 697 { 698 /*struct thread *td = curthread;*/ 699 struct iso_mnt *imp; 700 struct iso_node *ip; 701 struct buf *bp; 702 struct vnode *vp; 703 dev_t dev; 704 int error; 705 706 imp = VFSTOISOFS(mp); 707 dev = imp->im_dev; 708 again: 709 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 710 return (0); 711 712 /* Allocate a new vnode/iso_node. */ 713 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0); 714 if (error) { 715 *vpp = NULLVP; 716 return (error); 717 } 718 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 719 M_WAITOK); 720 bzero((caddr_t)ip, sizeof(struct iso_node)); 721 ip->i_vnode = vp; 722 ip->i_dev = dev; 723 ip->i_number = ino; 724 725 /* 726 * Insert it into the inode hash table and check for a collision. 727 * If a collision occurs, throw away the vnode and try again. 728 */ 729 if (cd9660_ihashins(ip) != 0) { 730 printf("debug: cd9660 ihashins collision, retrying\n"); 731 vx_put(vp); 732 free(ip, M_ISOFSNODE); 733 goto again; 734 } 735 vp->v_data = ip; 736 737 if (isodir == 0) { 738 int lbn, off; 739 740 lbn = lblkno(imp, ino); 741 if (lbn >= imp->volume_space_size) { 742 vx_put(vp); 743 printf("fhtovp: lbn exceed volume space %d\n", lbn); 744 return (ESTALE); 745 } 746 747 off = blkoff(imp, ino); 748 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 749 vx_put(vp); 750 printf("fhtovp: crosses block boundary %d\n", 751 off + ISO_DIRECTORY_RECORD_SIZE); 752 return (ESTALE); 753 } 754 755 error = bread(imp->im_devvp, 756 lbn << (imp->im_bshift - DEV_BSHIFT), 757 imp->logical_block_size, &bp); 758 if (error) { 759 vx_put(vp); 760 brelse(bp); 761 printf("fhtovp: bread error %d\n",error); 762 return (error); 763 } 764 isodir = (struct iso_directory_record *)(bp->b_data + off); 765 766 if (off + isonum_711(isodir->length) > 767 imp->logical_block_size) { 768 vx_put(vp); 769 if (bp != 0) 770 brelse(bp); 771 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 772 off +isonum_711(isodir->length), off, 773 isonum_711(isodir->length)); 774 return (ESTALE); 775 } 776 777 #if 0 778 if (isonum_733(isodir->extent) + 779 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 780 if (bp != 0) 781 brelse(bp); 782 printf("fhtovp: file start miss %d vs %d\n", 783 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 784 ifhp->ifid_start); 785 return (ESTALE); 786 } 787 #endif 788 } else 789 bp = 0; 790 791 ip->i_mnt = imp; 792 ip->i_devvp = imp->im_devvp; 793 vref(ip->i_devvp); 794 795 if (relocated) { 796 /* 797 * On relocated directories we must 798 * read the `.' entry out of a dir. 799 */ 800 ip->iso_start = ino >> imp->im_bshift; 801 if (bp != 0) 802 brelse(bp); 803 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 804 vx_put(vp); 805 return (error); 806 } 807 isodir = (struct iso_directory_record *)bp->b_data; 808 } 809 810 ip->iso_extent = isonum_733(isodir->extent); 811 ip->i_size = isonum_733(isodir->size); 812 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 813 814 /* 815 * Setup time stamp, attribute 816 */ 817 vp->v_type = VNON; 818 switch (imp->iso_ftype) { 819 default: /* ISO_FTYPE_9660 */ 820 { 821 struct buf *bp2; 822 int off; 823 if ((imp->im_flags & ISOFSMNT_EXTATT) 824 && (off = isonum_711(isodir->ext_attr_length))) 825 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 826 &bp2); 827 else 828 bp2 = NULL; 829 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 830 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 831 if (bp2) 832 brelse(bp2); 833 break; 834 } 835 case ISO_FTYPE_RRIP: 836 cd9660_rrip_analyze(isodir, ip, imp); 837 break; 838 } 839 840 if (bp != 0) 841 brelse(bp); 842 843 /* 844 * Initialize the associated vnode 845 */ 846 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 847 case VFIFO: 848 vp->v_ops = &mp->mnt_vn_fifo_ops; 849 break; 850 case VCHR: 851 case VBLK: 852 vp->v_ops = &mp->mnt_vn_spec_ops; 853 addaliasu(vp, ip->inode.iso_rdev); 854 break; 855 default: 856 break; 857 } 858 859 if (ip->iso_extent == imp->root_extent) 860 vp->v_flag |= VROOT; 861 862 /* 863 * Return the locked and refd vp 864 */ 865 *vpp = vp; 866 return (0); 867 } 868 869 /* 870 * Vnode pointer to File handle 871 */ 872 /* ARGSUSED */ 873 int 874 cd9660_vptofh(struct vnode *vp, struct fid *fhp) 875 { 876 struct iso_node *ip = VTOI(vp); 877 struct ifid *ifhp; 878 879 ifhp = (struct ifid *)fhp; 880 ifhp->ifid_len = sizeof(struct ifid); 881 882 ifhp->ifid_ino = ip->i_number; 883 ifhp->ifid_start = ip->iso_start; 884 885 #ifdef ISOFS_DBG 886 printf("vptofh: ino %d, start %ld\n", 887 ifhp->ifid_ino,ifhp->ifid_start); 888 #endif 889 return 0; 890 } 891