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 1.36 2006/05/06 18:48:53 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 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 (dev_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(dev_t dev) 114 { 115 struct ioc_toc_header h; 116 struct ioc_read_toc_single_entry t; 117 thread_t td = curthread; 118 int i; 119 120 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0) 121 return 0; 122 123 for (i = h.ending_track; i >= 0; i--) { 124 t.address_format = CD_LBA_FORMAT; 125 t.track = i; 126 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) { 127 return 0; 128 } 129 if ((t.entry.control & 4) != 0) 130 /* found a data track */ 131 break; 132 } 133 134 if (i < 0) 135 return 0; 136 137 return ntohl(t.entry.addr.lba); 138 } 139 140 static int 141 iso_mountroot(struct mount *mp) 142 { 143 struct iso_args args; 144 struct vnode *rootvp; 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); 154 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL); 155 VOP_UNLOCK(rootvp, 0); 156 if (error) 157 return (error); 158 159 args.ssector = iso_get_ssector(rootdev); 160 161 VOP_CLOSE(rootvp, FREAD); 162 163 if (bootverbose) 164 printf("iso_mountroot(): using session at block %d\n", 165 args.ssector); 166 if ((error = iso_mountfs(rootvp, mp, &args)) != 0) 167 return (error); 168 169 cd9660_statfs(mp, &mp->mnt_stat, proc0.p_ucred); 170 return (0); 171 } 172 173 /* 174 * VFS Operations. 175 * 176 * mount system call 177 */ 178 static int 179 cd9660_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) 180 { 181 struct vnode *devvp; 182 struct iso_args args; 183 size_t size; 184 int error; 185 mode_t accessmode; 186 struct iso_mnt *imp = 0; 187 struct nlookupdata nd; 188 189 if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) { 190 return (iso_mountroot(mp)); 191 } 192 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 193 return (error); 194 195 if ((mp->mnt_flag & MNT_RDONLY) == 0) 196 return (EROFS); 197 198 /* 199 * If updating, check whether changing from read-only to 200 * read/write; if there is no device name, that's all we do. 201 */ 202 if (mp->mnt_flag & MNT_UPDATE) { 203 imp = VFSTOISOFS(mp); 204 if (args.fspec == 0) 205 return (vfs_export(mp, &imp->im_export, &args.export)); 206 } 207 /* 208 * Not an update, or updating the name: look up the name 209 * and verify that it refers to a sensible block device. 210 */ 211 devvp = NULL; 212 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW); 213 if (error == 0) 214 error = nlookup(&nd); 215 if (error == 0) 216 error = cache_vref(nd.nl_ncp, nd.nl_cred, &devvp); 217 nlookup_done(&nd); 218 if (error) 219 return (error); 220 221 if (!vn_isdisk(devvp, &error)) { 222 vrele(devvp); 223 return (error); 224 } 225 226 /* 227 * Verify that user has necessary permissions on the device, 228 * or has superuser abilities 229 */ 230 accessmode = VREAD; 231 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 232 error = VOP_ACCESS(devvp, accessmode, cred); 233 if (error) 234 error = suser_cred(cred, 0); 235 if (error) { 236 vput(devvp); 237 return (error); 238 } 239 VOP_UNLOCK(devvp, 0); 240 241 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 242 error = iso_mountfs(devvp, mp, &args); 243 } else { 244 if (devvp != imp->im_devvp) 245 error = EINVAL; /* needs translation */ 246 else 247 vrele(devvp); 248 } 249 if (error) { 250 vrele(devvp); 251 return error; 252 } 253 imp = VFSTOISOFS(mp); 254 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 255 &size); 256 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 257 cd9660_statfs(mp, &mp->mnt_stat, cred); 258 return 0; 259 } 260 261 /* 262 * Common code for mount and mountroot 263 */ 264 static int 265 iso_mountfs(struct vnode *devvp, struct mount *mp, struct iso_args *argp) 266 { 267 struct iso_mnt *isomp = NULL; 268 struct buf *bp = NULL; 269 struct buf *pribp = NULL, *supbp = NULL; 270 dev_t dev; 271 int error = EINVAL; 272 int needclose = 0; 273 int high_sierra = 0; 274 int iso_bsize; 275 int iso_blknum; 276 int joliet_level; 277 struct iso_volume_descriptor *vdp = 0; 278 struct iso_primary_descriptor *pri = NULL; 279 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 280 struct iso_supplementary_descriptor *sup = NULL; 281 struct iso_directory_record *rootp; 282 int logical_block_size; 283 284 if (!(mp->mnt_flag & MNT_RDONLY)) 285 return EROFS; 286 287 /* 288 * Disallow multiple mounts of the same device. 289 * Disallow mounting of a device that is currently in use 290 * Flush out any old buffers remaining from a previous use. 291 */ 292 if ((error = vfs_mountedon(devvp))) 293 return error; 294 if (count_udev(devvp->v_udev) > 0) 295 return EBUSY; 296 if ((error = vinvalbuf(devvp, V_SAVE, 0, 0))) 297 return (error); 298 299 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 300 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL); 301 VOP_UNLOCK(devvp, 0); 302 if (error) 303 return error; 304 dev = devvp->v_rdev; 305 if (dev->si_iosize_max != 0) 306 mp->mnt_iosize_max = dev->si_iosize_max; 307 if (mp->mnt_iosize_max > MAXPHYS) 308 mp->mnt_iosize_max = MAXPHYS; 309 310 needclose = 1; 311 312 /* This is the "logical sector size". The standard says this 313 * should be 2048 or the physical sector size on the device, 314 * whichever is greater. For now, we'll just use a constant. 315 */ 316 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 317 318 joliet_level = 0; 319 for (iso_blknum = 16 + argp->ssector; 320 iso_blknum < 100 + argp->ssector; 321 iso_blknum++) { 322 if ((error = bread(devvp, (off_t)iso_blknum * iso_bsize, 323 iso_bsize, &bp)) != 0) 324 goto out; 325 326 vdp = (struct iso_volume_descriptor *)bp->b_data; 327 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 328 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 329 sizeof vdp->id) != 0) { 330 error = EINVAL; 331 goto out; 332 } else 333 high_sierra = 1; 334 } 335 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 336 case ISO_VD_PRIMARY: 337 if (pribp == NULL) { 338 pribp = bp; 339 bp = NULL; 340 pri = (struct iso_primary_descriptor *)vdp; 341 pri_sierra = 342 (struct iso_sierra_primary_descriptor *)vdp; 343 } 344 break; 345 346 case ISO_VD_SUPPLEMENTARY: 347 if (supbp == NULL) { 348 supbp = bp; 349 bp = NULL; 350 sup = (struct iso_supplementary_descriptor *)vdp; 351 352 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 353 if (bcmp(sup->escape, "%/@", 3) == 0) 354 joliet_level = 1; 355 if (bcmp(sup->escape, "%/C", 3) == 0) 356 joliet_level = 2; 357 if (bcmp(sup->escape, "%/E", 3) == 0) 358 joliet_level = 3; 359 360 if ((isonum_711 (sup->flags) & 1) && 361 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 362 joliet_level = 0; 363 } 364 } 365 break; 366 367 case ISO_VD_END: 368 goto vd_end; 369 370 default: 371 break; 372 } 373 if (bp) { 374 brelse(bp); 375 bp = NULL; 376 } 377 } 378 vd_end: 379 if (bp) { 380 brelse(bp); 381 bp = NULL; 382 } 383 384 if (pri == NULL) { 385 error = EINVAL; 386 goto out; 387 } 388 389 logical_block_size = 390 isonum_723 (high_sierra? 391 pri_sierra->logical_block_size: 392 pri->logical_block_size); 393 394 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 395 || (logical_block_size & (logical_block_size - 1)) != 0) { 396 error = EINVAL; 397 goto out; 398 } 399 400 rootp = (struct iso_directory_record *) 401 (high_sierra? 402 pri_sierra->root_directory_record: 403 pri->root_directory_record); 404 405 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 406 isomp->logical_block_size = logical_block_size; 407 isomp->volume_space_size = 408 isonum_733 (high_sierra? 409 pri_sierra->volume_space_size: 410 pri->volume_space_size); 411 isomp->joliet_level = 0; 412 /* 413 * Since an ISO9660 multi-session CD can also access previous 414 * sessions, we have to include them into the space consider- 415 * ations. This doesn't yield a very accurate number since 416 * parts of the old sessions might be inaccessible now, but we 417 * can't do much better. This is also important for the NFS 418 * filehandle validation. 419 */ 420 isomp->volume_space_size += argp->ssector; 421 bcopy (rootp, isomp->root, sizeof isomp->root); 422 isomp->root_extent = isonum_733 (rootp->extent); 423 isomp->root_size = isonum_733 (rootp->size); 424 425 isomp->im_bmask = logical_block_size - 1; 426 isomp->im_bshift = ffs(logical_block_size) - 1; 427 428 pribp->b_flags |= B_AGE; 429 brelse(pribp); 430 pribp = NULL; 431 432 mp->mnt_data = (qaddr_t)isomp; 433 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 434 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 435 mp->mnt_maxsymlinklen = 0; 436 mp->mnt_flag |= MNT_LOCAL; 437 isomp->im_mountp = mp; 438 isomp->im_dev = dev; 439 isomp->im_devvp = devvp; 440 441 dev->si_mountpoint = mp; 442 443 /* Check the Rock Ridge Extention support */ 444 if (!(argp->flags & ISOFSMNT_NORRIP)) { 445 if ((error = bread(isomp->im_devvp, 446 lblktooff(isomp, isomp->root_extent + isonum_711(rootp->ext_attr_length)), 447 isomp->logical_block_size, &bp)) != 0) 448 goto out; 449 450 rootp = (struct iso_directory_record *)bp->b_data; 451 452 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 453 argp->flags |= ISOFSMNT_NORRIP; 454 } else { 455 argp->flags &= ~ISOFSMNT_GENS; 456 } 457 458 /* 459 * The contents are valid, 460 * but they will get reread as part of another vnode, so... 461 */ 462 bp->b_flags |= B_AGE; 463 brelse(bp); 464 bp = NULL; 465 } 466 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 467 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 468 469 if (high_sierra) { 470 /* this effectively ignores all the mount flags */ 471 log(LOG_INFO, "cd9660: High Sierra Format\n"); 472 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 473 } else { 474 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 475 default: 476 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 477 break; 478 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 479 isomp->iso_ftype = ISO_FTYPE_9660; 480 break; 481 case 0: 482 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 483 isomp->iso_ftype = ISO_FTYPE_RRIP; 484 break; 485 } 486 } 487 488 /* Decide whether to use the Joliet descriptor */ 489 490 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 491 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 492 rootp = (struct iso_directory_record *) 493 sup->root_directory_record; 494 bcopy (rootp, isomp->root, sizeof isomp->root); 495 isomp->root_extent = isonum_733 (rootp->extent); 496 isomp->root_size = isonum_733 (rootp->size); 497 isomp->joliet_level = joliet_level; 498 supbp->b_flags |= B_AGE; 499 } 500 501 if (supbp) { 502 brelse(supbp); 503 supbp = NULL; 504 } 505 506 vfs_add_vnodeops(mp, &mp->mnt_vn_norm_ops, 507 cd9660_vnodeop_entries, 0); 508 vfs_add_vnodeops(mp, &mp->mnt_vn_spec_ops, 509 cd9660_specop_entries, 0); 510 vfs_add_vnodeops(mp, &mp->mnt_vn_fifo_ops, 511 cd9660_fifoop_entries, 0); 512 513 return 0; 514 out: 515 dev->si_mountpoint = NULL; 516 if (bp) 517 brelse(bp); 518 if (pribp) 519 brelse(pribp); 520 if (supbp) 521 brelse(supbp); 522 if (needclose) 523 VOP_CLOSE(devvp, FREAD); 524 if (isomp) { 525 free((caddr_t)isomp, M_ISOFSMNT); 526 mp->mnt_data = (qaddr_t)0; 527 } 528 return error; 529 } 530 531 /* 532 * unmount system call 533 */ 534 static int 535 cd9660_unmount(struct mount *mp, int mntflags) 536 { 537 struct iso_mnt *isomp; 538 int error, flags = 0; 539 540 if (mntflags & MNT_FORCE) 541 flags |= FORCECLOSE; 542 #if 0 543 mntflushbuf(mp, 0); 544 if (mntinvalbuf(mp)) 545 return EBUSY; 546 #endif 547 if ((error = vflush(mp, 0, flags))) 548 return (error); 549 550 isomp = VFSTOISOFS(mp); 551 552 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 553 error = VOP_CLOSE(isomp->im_devvp, FREAD); 554 vrele(isomp->im_devvp); 555 free((caddr_t)isomp, M_ISOFSMNT); 556 mp->mnt_data = (qaddr_t)0; 557 mp->mnt_flag &= ~MNT_LOCAL; 558 return (error); 559 } 560 561 /* 562 * Return root of a filesystem 563 */ 564 static int 565 cd9660_root(struct mount *mp, struct vnode **vpp) 566 { 567 struct iso_mnt *imp = VFSTOISOFS(mp); 568 struct iso_directory_record *dp = 569 (struct iso_directory_record *)imp->root; 570 ino_t ino = isodirino(dp, imp); 571 572 /* 573 * With RRIP we must use the `.' entry of the root directory. 574 * Simply tell vget, that it's a relocated directory. 575 */ 576 return (cd9660_vget_internal(mp, ino, vpp, 577 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 578 } 579 580 /* 581 * Get file system statistics. 582 */ 583 int 584 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 585 { 586 struct iso_mnt *isomp; 587 588 isomp = VFSTOISOFS(mp); 589 590 sbp->f_bsize = isomp->logical_block_size; 591 sbp->f_iosize = sbp->f_bsize; /* XXX */ 592 sbp->f_blocks = isomp->volume_space_size; 593 sbp->f_bfree = 0; /* total free blocks */ 594 sbp->f_bavail = 0; /* blocks free for non superuser */ 595 sbp->f_files = 0; /* total files */ 596 sbp->f_ffree = 0; /* free file nodes */ 597 if (sbp != &mp->mnt_stat) { 598 sbp->f_type = mp->mnt_vfc->vfc_typenum; 599 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 600 } 601 return 0; 602 } 603 604 /* 605 * File handle to vnode 606 * 607 * Have to be really careful about stale file handles: 608 * - check that the inode number is in range 609 * - call iget() to get the locked inode 610 * - check for an unallocated inode (i_mode == 0) 611 * - check that the generation number matches 612 */ 613 614 struct ifid { 615 ushort ifid_len; 616 ushort ifid_pad; 617 int ifid_ino; 618 long ifid_start; 619 }; 620 621 /* ARGSUSED */ 622 int 623 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 624 { 625 struct ifid *ifhp = (struct ifid *)fhp; 626 struct iso_node *ip; 627 struct vnode *nvp; 628 int error; 629 630 #ifdef ISOFS_DBG 631 printf("fhtovp: ino %d, start %ld\n", 632 ifhp->ifid_ino, ifhp->ifid_start); 633 #endif 634 635 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 636 *vpp = NULLVP; 637 return (error); 638 } 639 ip = VTOI(nvp); 640 if (ip->inode.iso_mode == 0) { 641 vput(nvp); 642 *vpp = NULLVP; 643 return (ESTALE); 644 } 645 *vpp = nvp; 646 return (0); 647 } 648 649 int 650 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp, 651 struct ucred **credanonp) 652 { 653 struct netcred *np; 654 struct iso_mnt *imp; 655 656 imp = VFSTOISOFS(mp); 657 658 /* 659 * Get the export permission structure for this <mp, client> tuple. 660 */ 661 np = vfs_export_lookup(mp, &imp->im_export, nam); 662 if (np == NULL) 663 return (EACCES); 664 665 *exflagsp = np->netc_exflags; 666 *credanonp = &np->netc_anon; 667 return (0); 668 } 669 670 int 671 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 672 { 673 674 /* 675 * XXXX 676 * It would be nice if we didn't always set the `relocated' flag 677 * and force the extra read, but I don't want to think about fixing 678 * that right now. 679 */ 680 return (cd9660_vget_internal(mp, ino, vpp, 681 #if 0 682 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 683 #else 684 0, 685 #endif 686 (struct iso_directory_record *)0)); 687 } 688 689 int 690 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 691 int relocated, struct iso_directory_record *isodir) 692 { 693 struct iso_mnt *imp; 694 struct iso_node *ip; 695 struct buf *bp; 696 struct vnode *vp; 697 dev_t dev; 698 int error; 699 700 imp = VFSTOISOFS(mp); 701 dev = imp->im_dev; 702 again: 703 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 704 return (0); 705 706 /* Allocate a new vnode/iso_node. */ 707 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0); 708 if (error) { 709 *vpp = NULLVP; 710 return (error); 711 } 712 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 713 M_WAITOK); 714 bzero((caddr_t)ip, sizeof(struct iso_node)); 715 ip->i_vnode = vp; 716 ip->i_dev = dev; 717 ip->i_number = ino; 718 719 /* 720 * Insert it into the inode hash table and check for a collision. 721 * If a collision occurs, throw away the vnode and try again. 722 */ 723 if (cd9660_ihashins(ip) != 0) { 724 printf("debug: cd9660 ihashins collision, retrying\n"); 725 vx_put(vp); 726 free(ip, M_ISOFSNODE); 727 goto again; 728 } 729 vp->v_data = ip; 730 731 if (isodir == NULL) { 732 int lbn, off; 733 734 lbn = lblkno(imp, ino); 735 if (lbn >= imp->volume_space_size) { 736 vx_put(vp); 737 printf("fhtovp: lbn exceed volume space %d\n", lbn); 738 return (ESTALE); 739 } 740 741 off = blkoff(imp, ino); 742 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 743 vx_put(vp); 744 printf("fhtovp: crosses block boundary %d\n", 745 off + ISO_DIRECTORY_RECORD_SIZE); 746 return (ESTALE); 747 } 748 749 error = bread(imp->im_devvp, 750 lblktooff(imp, lbn), 751 imp->logical_block_size, &bp); 752 if (error) { 753 vx_put(vp); 754 brelse(bp); 755 printf("fhtovp: bread error %d\n",error); 756 return (error); 757 } 758 isodir = (struct iso_directory_record *)(bp->b_data + off); 759 760 if (off + isonum_711(isodir->length) > 761 imp->logical_block_size) { 762 vx_put(vp); 763 if (bp != NULL) 764 brelse(bp); 765 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 766 off +isonum_711(isodir->length), off, 767 isonum_711(isodir->length)); 768 return (ESTALE); 769 } 770 771 #if 0 772 if (isonum_733(isodir->extent) + 773 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 774 if (bp != NULL) 775 brelse(bp); 776 printf("fhtovp: file start miss %d vs %d\n", 777 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 778 ifhp->ifid_start); 779 return (ESTALE); 780 } 781 #endif 782 } else 783 bp = 0; 784 785 ip->i_mnt = imp; 786 ip->i_devvp = imp->im_devvp; 787 vref(ip->i_devvp); 788 789 if (relocated) { 790 /* 791 * On relocated directories we must 792 * read the `.' entry out of a dir. 793 */ 794 ip->iso_start = ino >> imp->im_bshift; 795 if (bp != NULL) 796 brelse(bp); 797 if ((error = cd9660_devblkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 798 vx_put(vp); 799 return (error); 800 } 801 isodir = (struct iso_directory_record *)bp->b_data; 802 } 803 804 ip->iso_extent = isonum_733(isodir->extent); 805 ip->i_size = isonum_733(isodir->size); 806 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 807 808 /* 809 * Setup time stamp, attribute 810 */ 811 vp->v_type = VNON; 812 switch (imp->iso_ftype) { 813 default: /* ISO_FTYPE_9660 */ 814 { 815 struct buf *bp2; 816 int off; 817 if ((imp->im_flags & ISOFSMNT_EXTATT) 818 && (off = isonum_711(isodir->ext_attr_length))) 819 cd9660_devblkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 820 &bp2); 821 else 822 bp2 = NULL; 823 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 824 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 825 if (bp2) 826 brelse(bp2); 827 break; 828 } 829 case ISO_FTYPE_RRIP: 830 cd9660_rrip_analyze(isodir, ip, imp); 831 break; 832 } 833 834 if (bp != NULL) 835 brelse(bp); 836 837 /* 838 * Initialize the associated vnode 839 */ 840 vp->v_type = IFTOVT(ip->inode.iso_mode); 841 842 switch (vp->v_type) { 843 case VFIFO: 844 vp->v_ops = &mp->mnt_vn_fifo_ops; 845 break; 846 case VCHR: 847 case VBLK: 848 vp->v_ops = &mp->mnt_vn_spec_ops; 849 addaliasu(vp, ip->inode.iso_rdev); 850 break; 851 case VREG: 852 case VDIR: 853 vinitvmio(vp, ip->i_size); 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