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 1.45 2008/01/05 14:02:41 swildner 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 vop_ops cd9660_vnode_vops; 66 extern struct vop_ops cd9660_spec_vops; 67 extern struct vop_ops cd9660_fifo_vops; 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 ucred *); 73 static int cd9660_unmount (struct mount *, int); 74 static int cd9660_root (struct mount *, struct vnode **); 75 static int cd9660_statfs (struct mount *, struct statfs *, struct ucred *); 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 .vfs_mount = cd9660_mount, 84 .vfs_unmount = cd9660_unmount, 85 .vfs_root = cd9660_root, 86 .vfs_statfs = cd9660_statfs, 87 .vfs_sync = vfs_stdsync, 88 .vfs_vget = cd9660_vget, 89 .vfs_fhtovp = cd9660_fhtovp, 90 .vfs_checkexp = cd9660_checkexp, 91 .vfs_vptofh = cd9660_vptofh, 92 .vfs_init = cd9660_init, 93 .vfs_uninit = cd9660_uninit, 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 (cdev_t dev); 104 static int iso_mountfs (struct vnode *devvp, struct mount *mp, 105 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(cdev_t dev) 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, proc0.p_ucred) != 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, proc0.p_ucred) != 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 140 iso_mountroot(struct mount *mp) 141 { 142 struct iso_args args; 143 struct vnode *rootvp; 144 int error; 145 146 if ((error = bdevvp(rootdev, &rootvp))) { 147 kprintf("iso_mountroot: can't find rootvp\n"); 148 return (error); 149 } 150 args.flags = ISOFSMNT_ROOT; 151 152 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY); 153 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL); 154 vn_unlock(rootvp); 155 if (error) 156 return (error); 157 158 args.ssector = iso_get_ssector(rootdev); 159 160 VOP_CLOSE(rootvp, FREAD); 161 162 if (bootverbose) 163 kprintf("iso_mountroot(): using session at block %d\n", 164 args.ssector); 165 if ((error = iso_mountfs(rootvp, mp, &args)) != 0) 166 return (error); 167 168 cd9660_statfs(mp, &mp->mnt_stat, proc0.p_ucred); 169 return (0); 170 } 171 172 /* 173 * VFS Operations. 174 * 175 * mount system call 176 */ 177 static int 178 cd9660_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) 179 { 180 struct vnode *devvp; 181 struct iso_args args; 182 size_t size; 183 int error; 184 mode_t accessmode; 185 struct iso_mnt *imp = 0; 186 struct nlookupdata nd; 187 188 if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) { 189 return (iso_mountroot(mp)); 190 } 191 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 192 return (error); 193 194 if ((mp->mnt_flag & MNT_RDONLY) == 0) 195 return (EROFS); 196 197 /* 198 * If updating, check whether changing from read-only to 199 * read/write; if there is no device name, that's all we do. 200 */ 201 if (mp->mnt_flag & MNT_UPDATE) { 202 imp = VFSTOISOFS(mp); 203 if (args.fspec == 0) 204 return (vfs_export(mp, &imp->im_export, &args.export)); 205 } 206 /* 207 * Not an update, or updating the name: look up the name 208 * and verify that it refers to a sensible block device. 209 */ 210 devvp = NULL; 211 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW); 212 if (error == 0) 213 error = nlookup(&nd); 214 if (error == 0) 215 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp); 216 nlookup_done(&nd); 217 if (error) 218 return (error); 219 220 if (!vn_isdisk(devvp, &error)) { 221 vrele(devvp); 222 return (error); 223 } 224 225 /* 226 * Verify that user has necessary permissions on the device, 227 * or has superuser abilities 228 */ 229 accessmode = VREAD; 230 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 231 error = VOP_ACCESS(devvp, accessmode, cred); 232 if (error) 233 error = suser_cred(cred, 0); 234 if (error) { 235 vput(devvp); 236 return (error); 237 } 238 vn_unlock(devvp); 239 240 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 241 error = iso_mountfs(devvp, mp, &args); 242 } else { 243 if (devvp != imp->im_devvp) 244 error = EINVAL; /* needs translation */ 245 else 246 vrele(devvp); 247 } 248 if (error) { 249 vrele(devvp); 250 return error; 251 } 252 imp = VFSTOISOFS(mp); 253 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 254 &size); 255 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 256 cd9660_statfs(mp, &mp->mnt_stat, cred); 257 return 0; 258 } 259 260 /* 261 * Common code for mount and mountroot 262 */ 263 static int 264 iso_mountfs(struct vnode *devvp, struct mount *mp, struct iso_args *argp) 265 { 266 struct iso_mnt *isomp = NULL; 267 struct buf *bp = NULL; 268 struct buf *pribp = NULL, *supbp = NULL; 269 cdev_t dev; 270 int error = EINVAL; 271 int needclose = 0; 272 int high_sierra = 0; 273 int iso_bsize; 274 int iso_blknum; 275 int joliet_level; 276 struct iso_volume_descriptor *vdp = 0; 277 struct iso_primary_descriptor *pri = NULL; 278 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 279 struct iso_supplementary_descriptor *sup = NULL; 280 struct iso_directory_record *rootp; 281 int logical_block_size; 282 283 if (!(mp->mnt_flag & MNT_RDONLY)) 284 return EROFS; 285 286 /* 287 * Disallow multiple mounts of the same device. 288 * Disallow mounting of a device that is currently in use 289 * Flush out any old buffers remaining from a previous use. 290 */ 291 if ((error = vfs_mountedon(devvp))) 292 return error; 293 if (count_udev(devvp->v_umajor, devvp->v_uminor) > 0) 294 return EBUSY; 295 if ((error = vinvalbuf(devvp, V_SAVE, 0, 0))) 296 return (error); 297 298 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 299 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL); 300 vn_unlock(devvp); 301 if (error) 302 return error; 303 dev = devvp->v_rdev; 304 if (dev->si_iosize_max != 0) 305 mp->mnt_iosize_max = dev->si_iosize_max; 306 if (mp->mnt_iosize_max > MAXPHYS) 307 mp->mnt_iosize_max = MAXPHYS; 308 309 needclose = 1; 310 311 /* This is the "logical sector size". The standard says this 312 * should be 2048 or the physical sector size on the device, 313 * whichever is greater. For now, we'll just use a constant. 314 */ 315 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 316 317 joliet_level = 0; 318 for (iso_blknum = 16 + argp->ssector; 319 iso_blknum < 100 + argp->ssector; 320 iso_blknum++) { 321 if ((error = bread(devvp, (off_t)iso_blknum * iso_bsize, 322 iso_bsize, &bp)) != 0) 323 goto out; 324 325 vdp = (struct iso_volume_descriptor *)bp->b_data; 326 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 327 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 328 sizeof vdp->id) != 0) { 329 error = EINVAL; 330 goto out; 331 } else 332 high_sierra = 1; 333 } 334 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 335 case ISO_VD_PRIMARY: 336 if (pribp == NULL) { 337 pribp = bp; 338 bp = NULL; 339 pri = (struct iso_primary_descriptor *)vdp; 340 pri_sierra = 341 (struct iso_sierra_primary_descriptor *)vdp; 342 } 343 break; 344 345 case ISO_VD_SUPPLEMENTARY: 346 if (supbp == NULL) { 347 supbp = bp; 348 bp = NULL; 349 sup = (struct iso_supplementary_descriptor *)vdp; 350 351 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 352 if (bcmp(sup->escape, "%/@", 3) == 0) 353 joliet_level = 1; 354 if (bcmp(sup->escape, "%/C", 3) == 0) 355 joliet_level = 2; 356 if (bcmp(sup->escape, "%/E", 3) == 0) 357 joliet_level = 3; 358 359 if ((isonum_711 (sup->flags) & 1) && 360 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 361 joliet_level = 0; 362 } 363 } 364 break; 365 366 case ISO_VD_END: 367 goto vd_end; 368 369 default: 370 break; 371 } 372 if (bp) { 373 brelse(bp); 374 bp = NULL; 375 } 376 } 377 vd_end: 378 if (bp) { 379 brelse(bp); 380 bp = NULL; 381 } 382 383 if (pri == NULL) { 384 error = EINVAL; 385 goto out; 386 } 387 388 logical_block_size = 389 isonum_723 (high_sierra? 390 pri_sierra->logical_block_size: 391 pri->logical_block_size); 392 393 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 394 || (logical_block_size & (logical_block_size - 1)) != 0) { 395 error = EINVAL; 396 goto out; 397 } 398 399 rootp = (struct iso_directory_record *) 400 (high_sierra? 401 pri_sierra->root_directory_record: 402 pri->root_directory_record); 403 404 isomp = kmalloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 405 isomp->logical_block_size = logical_block_size; 406 isomp->volume_space_size = 407 isonum_733 (high_sierra? 408 pri_sierra->volume_space_size: 409 pri->volume_space_size); 410 isomp->joliet_level = 0; 411 /* 412 * Since an ISO9660 multi-session CD can also access previous 413 * sessions, we have to include them into the space consider- 414 * ations. This doesn't yield a very accurate number since 415 * parts of the old sessions might be inaccessible now, but we 416 * can't do much better. This is also important for the NFS 417 * filehandle validation. 418 */ 419 isomp->volume_space_size += argp->ssector; 420 bcopy (rootp, isomp->root, sizeof isomp->root); 421 isomp->root_extent = isonum_733 (rootp->extent); 422 isomp->root_size = isonum_733 (rootp->size); 423 424 isomp->im_bmask = logical_block_size - 1; 425 isomp->im_bshift = ffs(logical_block_size) - 1; 426 427 pribp->b_flags |= B_AGE; 428 brelse(pribp); 429 pribp = NULL; 430 431 mp->mnt_data = (qaddr_t)isomp; 432 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 433 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 434 mp->mnt_maxsymlinklen = 0; 435 mp->mnt_flag |= MNT_LOCAL; 436 isomp->im_mountp = mp; 437 isomp->im_dev = dev; 438 isomp->im_devvp = devvp; 439 440 dev->si_mountpoint = mp; 441 442 /* Check the Rock Ridge Extention support */ 443 if (!(argp->flags & ISOFSMNT_NORRIP)) { 444 if ((error = bread(isomp->im_devvp, 445 lblktooff(isomp, isomp->root_extent + isonum_711(rootp->ext_attr_length)), 446 isomp->logical_block_size, &bp)) != 0) 447 goto out; 448 449 rootp = (struct iso_directory_record *)bp->b_data; 450 451 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 452 argp->flags |= ISOFSMNT_NORRIP; 453 } else { 454 argp->flags &= ~ISOFSMNT_GENS; 455 } 456 457 /* 458 * The contents are valid, 459 * but they will get reread as part of another vnode, so... 460 */ 461 bp->b_flags |= B_AGE; 462 brelse(bp); 463 bp = NULL; 464 } 465 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 466 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 467 468 if (high_sierra) { 469 /* this effectively ignores all the mount flags */ 470 log(LOG_INFO, "cd9660: High Sierra Format\n"); 471 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 472 } else { 473 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 474 default: 475 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 476 break; 477 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 478 isomp->iso_ftype = ISO_FTYPE_9660; 479 break; 480 case 0: 481 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 482 isomp->iso_ftype = ISO_FTYPE_RRIP; 483 break; 484 } 485 } 486 487 /* Decide whether to use the Joliet descriptor */ 488 489 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 490 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 491 rootp = (struct iso_directory_record *) 492 sup->root_directory_record; 493 bcopy (rootp, isomp->root, sizeof isomp->root); 494 isomp->root_extent = isonum_733 (rootp->extent); 495 isomp->root_size = isonum_733 (rootp->size); 496 isomp->joliet_level = joliet_level; 497 supbp->b_flags |= B_AGE; 498 } 499 500 if (supbp) { 501 brelse(supbp); 502 supbp = NULL; 503 } 504 505 vfs_add_vnodeops(mp, &cd9660_vnode_vops, &mp->mnt_vn_norm_ops); 506 vfs_add_vnodeops(mp, &cd9660_spec_vops, &mp->mnt_vn_spec_ops); 507 vfs_add_vnodeops(mp, &cd9660_fifo_vops, &mp->mnt_vn_fifo_ops); 508 509 return 0; 510 out: 511 dev->si_mountpoint = NULL; 512 if (bp) 513 brelse(bp); 514 if (pribp) 515 brelse(pribp); 516 if (supbp) 517 brelse(supbp); 518 if (needclose) 519 VOP_CLOSE(devvp, FREAD); 520 if (isomp) { 521 kfree((caddr_t)isomp, M_ISOFSMNT); 522 mp->mnt_data = (qaddr_t)0; 523 } 524 return error; 525 } 526 527 /* 528 * unmount system call 529 */ 530 static int 531 cd9660_unmount(struct mount *mp, int mntflags) 532 { 533 struct iso_mnt *isomp; 534 int error, flags = 0; 535 536 if (mntflags & MNT_FORCE) 537 flags |= FORCECLOSE; 538 #if 0 539 mntflushbuf(mp, 0); 540 if (mntinvalbuf(mp)) 541 return EBUSY; 542 #endif 543 if ((error = vflush(mp, 0, flags))) 544 return (error); 545 546 isomp = VFSTOISOFS(mp); 547 548 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 549 error = VOP_CLOSE(isomp->im_devvp, FREAD); 550 vrele(isomp->im_devvp); 551 kfree((caddr_t)isomp, M_ISOFSMNT); 552 mp->mnt_data = (qaddr_t)0; 553 mp->mnt_flag &= ~MNT_LOCAL; 554 return (error); 555 } 556 557 /* 558 * Return root of a filesystem 559 */ 560 static int 561 cd9660_root(struct mount *mp, struct vnode **vpp) 562 { 563 struct iso_mnt *imp = VFSTOISOFS(mp); 564 struct iso_directory_record *dp = 565 (struct iso_directory_record *)imp->root; 566 ino_t ino = isodirino(dp, imp); 567 568 /* 569 * With RRIP we must use the `.' entry of the root directory. 570 * Simply tell vget, that it's a relocated directory. 571 */ 572 return (cd9660_vget_internal(mp, ino, vpp, 573 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 574 } 575 576 /* 577 * Get file system statistics. 578 */ 579 int 580 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 581 { 582 struct iso_mnt *isomp; 583 584 isomp = VFSTOISOFS(mp); 585 586 sbp->f_bsize = isomp->logical_block_size; 587 sbp->f_iosize = sbp->f_bsize; /* XXX */ 588 sbp->f_blocks = isomp->volume_space_size; 589 sbp->f_bfree = 0; /* total free blocks */ 590 sbp->f_bavail = 0; /* blocks free for non superuser */ 591 sbp->f_files = 0; /* total files */ 592 sbp->f_ffree = 0; /* free file nodes */ 593 if (sbp != &mp->mnt_stat) { 594 sbp->f_type = mp->mnt_vfc->vfc_typenum; 595 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 596 } 597 return 0; 598 } 599 600 /* 601 * File handle to vnode 602 * 603 * Have to be really careful about stale file handles: 604 * - check that the inode number is in range 605 * - call iget() to get the locked inode 606 * - check for an unallocated inode (i_mode == 0) 607 * - check that the generation number matches 608 */ 609 610 struct ifid { 611 ushort ifid_len; 612 ushort ifid_pad; 613 int ifid_ino; 614 long ifid_start; 615 }; 616 617 /* ARGSUSED */ 618 int 619 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 620 { 621 struct ifid *ifhp = (struct ifid *)fhp; 622 struct iso_node *ip; 623 struct vnode *nvp; 624 int error; 625 626 #ifdef ISOFS_DBG 627 kprintf("fhtovp: ino %d, start %ld\n", 628 ifhp->ifid_ino, ifhp->ifid_start); 629 #endif 630 631 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 632 *vpp = NULLVP; 633 return (error); 634 } 635 ip = VTOI(nvp); 636 if (ip->inode.iso_mode == 0) { 637 vput(nvp); 638 *vpp = NULLVP; 639 return (ESTALE); 640 } 641 *vpp = nvp; 642 return (0); 643 } 644 645 int 646 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp, 647 struct ucred **credanonp) 648 { 649 struct netcred *np; 650 struct iso_mnt *imp; 651 652 imp = VFSTOISOFS(mp); 653 654 /* 655 * Get the export permission structure for this <mp, client> tuple. 656 */ 657 np = vfs_export_lookup(mp, &imp->im_export, nam); 658 if (np == NULL) 659 return (EACCES); 660 661 *exflagsp = np->netc_exflags; 662 *credanonp = &np->netc_anon; 663 return (0); 664 } 665 666 int 667 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 668 { 669 670 /* 671 * XXXX 672 * It would be nice if we didn't always set the `relocated' flag 673 * and force the extra read, but I don't want to think about fixing 674 * that right now. 675 */ 676 return (cd9660_vget_internal(mp, ino, vpp, 677 #if 0 678 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 679 #else 680 0, 681 #endif 682 (struct iso_directory_record *)0)); 683 } 684 685 int 686 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 687 int relocated, struct iso_directory_record *isodir) 688 { 689 struct iso_mnt *imp; 690 struct iso_node *ip; 691 struct buf *bp; 692 struct vnode *vp; 693 cdev_t dev; 694 int error; 695 696 imp = VFSTOISOFS(mp); 697 dev = imp->im_dev; 698 again: 699 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 700 return (0); 701 702 /* Allocate a new vnode/iso_node. */ 703 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0); 704 if (error) { 705 *vpp = NULLVP; 706 return (error); 707 } 708 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 709 M_WAITOK | M_ZERO); 710 ip->i_vnode = vp; 711 ip->i_dev = dev; 712 ip->i_number = ino; 713 714 /* 715 * Insert it into the inode hash table and check for a collision. 716 * If a collision occurs, throw away the vnode and try again. 717 */ 718 if (cd9660_ihashins(ip) != 0) { 719 kprintf("debug: cd9660 ihashins collision, retrying\n"); 720 vx_put(vp); 721 kfree(ip, M_ISOFSNODE); 722 goto again; 723 } 724 vp->v_data = ip; 725 726 if (isodir == NULL) { 727 int lbn, off; 728 729 lbn = lblkno(imp, ino); 730 if (lbn >= imp->volume_space_size) { 731 vx_put(vp); 732 kprintf("fhtovp: lbn exceed volume space %d\n", lbn); 733 return (ESTALE); 734 } 735 736 off = blkoff(imp, ino); 737 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 738 vx_put(vp); 739 kprintf("fhtovp: crosses block boundary %d\n", 740 off + ISO_DIRECTORY_RECORD_SIZE); 741 return (ESTALE); 742 } 743 744 error = bread(imp->im_devvp, 745 lblktooff(imp, lbn), 746 imp->logical_block_size, &bp); 747 if (error) { 748 vx_put(vp); 749 brelse(bp); 750 kprintf("fhtovp: bread error %d\n",error); 751 return (error); 752 } 753 isodir = (struct iso_directory_record *)(bp->b_data + off); 754 755 if (off + isonum_711(isodir->length) > 756 imp->logical_block_size) { 757 vx_put(vp); 758 if (bp != NULL) 759 brelse(bp); 760 kprintf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 761 off +isonum_711(isodir->length), off, 762 isonum_711(isodir->length)); 763 return (ESTALE); 764 } 765 766 #if 0 767 if (isonum_733(isodir->extent) + 768 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 769 if (bp != NULL) 770 brelse(bp); 771 kprintf("fhtovp: file start miss %d vs %d\n", 772 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 773 ifhp->ifid_start); 774 return (ESTALE); 775 } 776 #endif 777 } else 778 bp = 0; 779 780 ip->i_mnt = imp; 781 ip->i_devvp = imp->im_devvp; 782 vref(ip->i_devvp); 783 784 if (relocated) { 785 /* 786 * On relocated directories we must 787 * read the `.' entry out of a dir. 788 */ 789 ip->iso_start = ino >> imp->im_bshift; 790 if (bp != NULL) 791 brelse(bp); 792 if ((error = cd9660_devblkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 793 vx_put(vp); 794 return (error); 795 } 796 isodir = (struct iso_directory_record *)bp->b_data; 797 } 798 799 ip->iso_extent = isonum_733(isodir->extent); 800 ip->i_size = isonum_733(isodir->size); 801 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 802 803 /* 804 * Setup time stamp, attribute 805 */ 806 vp->v_type = VNON; 807 switch (imp->iso_ftype) { 808 default: /* ISO_FTYPE_9660 */ 809 { 810 struct buf *bp2; 811 int off; 812 if ((imp->im_flags & ISOFSMNT_EXTATT) 813 && (off = isonum_711(isodir->ext_attr_length))) 814 cd9660_devblkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 815 &bp2); 816 else 817 bp2 = NULL; 818 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 819 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 820 if (bp2) 821 brelse(bp2); 822 break; 823 } 824 case ISO_FTYPE_RRIP: 825 cd9660_rrip_analyze(isodir, ip, imp); 826 break; 827 } 828 829 if (bp != NULL) 830 brelse(bp); 831 832 /* 833 * Initialize the associated vnode 834 */ 835 vp->v_type = IFTOVT(ip->inode.iso_mode); 836 837 switch (vp->v_type) { 838 case VFIFO: 839 vp->v_ops = &mp->mnt_vn_fifo_ops; 840 break; 841 case VCHR: 842 case VBLK: 843 vp->v_ops = &mp->mnt_vn_spec_ops; 844 addaliasu(vp, umajor(ip->inode.iso_rdev), 845 uminor(ip->inode.iso_rdev)); 846 break; 847 case VREG: 848 case VDIR: 849 vinitvmio(vp, ip->i_size); 850 break; 851 default: 852 break; 853 } 854 855 if (ip->iso_extent == imp->root_extent) 856 vp->v_flag |= VROOT; 857 858 /* 859 * Return the locked and refd vp 860 */ 861 *vpp = vp; 862 return (0); 863 } 864 865 /* 866 * Vnode pointer to File handle 867 */ 868 /* ARGSUSED */ 869 int 870 cd9660_vptofh(struct vnode *vp, struct fid *fhp) 871 { 872 struct iso_node *ip = VTOI(vp); 873 struct ifid *ifhp; 874 875 ifhp = (struct ifid *)fhp; 876 ifhp->ifid_len = sizeof(struct ifid); 877 878 ifhp->ifid_ino = ip->i_number; 879 ifhp->ifid_start = ip->iso_start; 880 881 #ifdef ISOFS_DBG 882 kprintf("vptofh: ino %d, start %ld\n", 883 ifhp->ifid_ino,ifhp->ifid_start); 884 #endif 885 return 0; 886 } 887