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 1.46 2008/09/17 21:44:23 dillon Exp $ 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/proc.h> 46 #include <sys/priv.h> 47 #include <sys/nlookup.h> 48 #include <sys/kernel.h> 49 #include <sys/vnode.h> 50 #include <sys/mount.h> 51 #include <sys/buf.h> 52 #include <sys/cdio.h> 53 #include <sys/conf.h> 54 #include <sys/fcntl.h> 55 #include <sys/malloc.h> 56 #include <sys/stat.h> 57 #include <sys/syslog.h> 58 59 #include <vm/vm_zone.h> 60 61 #include "iso.h" 62 #include "iso_rrip.h" 63 #include "cd9660_node.h" 64 #include "cd9660_mount.h" 65 66 extern struct vop_ops cd9660_vnode_vops; 67 extern struct vop_ops cd9660_spec_vops; 68 extern struct vop_ops cd9660_fifo_vops; 69 70 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 71 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part"); 72 73 static int cd9660_mount (struct mount *, char *, caddr_t, struct ucred *); 74 static int cd9660_unmount (struct mount *, int); 75 static int cd9660_root (struct mount *, struct vnode **); 76 static int cd9660_statfs (struct mount *, struct statfs *, struct ucred *); 77 static int cd9660_vget (struct mount *, ino_t, struct vnode **); 78 static int cd9660_fhtovp (struct mount *, struct vnode *rootvp, 79 struct fid *, struct vnode **); 80 static int cd9660_checkexp (struct mount *, struct sockaddr *, 81 int *, struct ucred **); 82 static int cd9660_vptofh (struct vnode *, struct fid *); 83 84 static struct vfsops cd9660_vfsops = { 85 .vfs_mount = cd9660_mount, 86 .vfs_unmount = cd9660_unmount, 87 .vfs_root = cd9660_root, 88 .vfs_statfs = cd9660_statfs, 89 .vfs_sync = vfs_stdsync, 90 .vfs_vget = cd9660_vget, 91 .vfs_fhtovp = cd9660_fhtovp, 92 .vfs_checkexp = cd9660_checkexp, 93 .vfs_vptofh = cd9660_vptofh, 94 .vfs_init = cd9660_init, 95 .vfs_uninit = cd9660_uninit, 96 }; 97 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 98 MODULE_VERSION(cd9660, 1); 99 100 101 /* 102 * Called by vfs_mountroot when iso is going to be mounted as root. 103 */ 104 105 static int iso_get_ssector (cdev_t dev); 106 static int iso_mountfs (struct vnode *devvp, struct mount *mp, 107 struct iso_args *argp); 108 109 /* 110 * Try to find the start of the last data track on this CD-ROM. This 111 * is used to mount the last session of a multi-session CD. Bail out 112 * and return 0 if we fail, this is always a safe bet. 113 */ 114 static int 115 iso_get_ssector(cdev_t dev) 116 { 117 struct ioc_toc_header h; 118 struct ioc_read_toc_single_entry t; 119 int i; 120 121 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, proc0.p_ucred) != 0) 122 return 0; 123 124 for (i = h.ending_track; i >= 0; i--) { 125 t.address_format = CD_LBA_FORMAT; 126 t.track = i; 127 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, proc0.p_ucred) != 0) { 128 return 0; 129 } 130 if ((t.entry.control & 4) != 0) 131 /* found a data track */ 132 break; 133 } 134 135 if (i < 0) 136 return 0; 137 138 return ntohl(t.entry.addr.lba); 139 } 140 141 static int 142 iso_mountroot(struct mount *mp) 143 { 144 struct iso_args args; 145 struct vnode *rootvp; 146 int error; 147 148 if ((error = bdevvp(rootdev, &rootvp))) { 149 kprintf("iso_mountroot: can't find rootvp\n"); 150 return (error); 151 } 152 args.flags = ISOFSMNT_ROOT; 153 154 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY); 155 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL); 156 vn_unlock(rootvp); 157 if (error) 158 return (error); 159 160 args.ssector = iso_get_ssector(rootdev); 161 162 VOP_CLOSE(rootvp, FREAD); 163 164 if (bootverbose) 165 kprintf("iso_mountroot(): using session at block %d\n", 166 args.ssector); 167 if ((error = iso_mountfs(rootvp, mp, &args)) != 0) 168 return (error); 169 170 cd9660_statfs(mp, &mp->mnt_stat, proc0.p_ucred); 171 return (0); 172 } 173 174 /* 175 * VFS Operations. 176 * 177 * mount system call 178 */ 179 static int 180 cd9660_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) 181 { 182 struct vnode *devvp; 183 struct iso_args args; 184 size_t size; 185 int error; 186 mode_t accessmode; 187 struct iso_mnt *imp = 0; 188 struct nlookupdata nd; 189 190 if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) { 191 return (iso_mountroot(mp)); 192 } 193 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 194 return (error); 195 196 if ((mp->mnt_flag & MNT_RDONLY) == 0) 197 return (EROFS); 198 199 /* 200 * If updating, check whether changing from read-only to 201 * read/write; if there is no device name, that's all we do. 202 */ 203 if (mp->mnt_flag & MNT_UPDATE) { 204 imp = VFSTOISOFS(mp); 205 if (args.fspec == 0) 206 return (vfs_export(mp, &imp->im_export, &args.export)); 207 } 208 /* 209 * Not an update, or updating the name: look up the name 210 * and verify that it refers to a sensible block device. 211 */ 212 devvp = NULL; 213 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW); 214 if (error == 0) 215 error = nlookup(&nd); 216 if (error == 0) 217 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp); 218 nlookup_done(&nd); 219 if (error) 220 return (error); 221 222 if (!vn_isdisk(devvp, &error)) { 223 vrele(devvp); 224 return (error); 225 } 226 227 /* 228 * Verify that user has necessary permissions on the device, 229 * or has superuser abilities 230 */ 231 accessmode = VREAD; 232 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 233 error = VOP_ACCESS(devvp, accessmode, cred); 234 if (error) 235 error = priv_check_cred(cred, PRIV_ROOT, 0); 236 if (error) { 237 vput(devvp); 238 return (error); 239 } 240 vn_unlock(devvp); 241 242 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 243 error = iso_mountfs(devvp, mp, &args); 244 } else { 245 if (devvp != imp->im_devvp) 246 error = EINVAL; /* needs translation */ 247 else 248 vrele(devvp); 249 } 250 if (error) { 251 vrele(devvp); 252 return error; 253 } 254 imp = VFSTOISOFS(mp); 255 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 256 &size); 257 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 258 cd9660_statfs(mp, &mp->mnt_stat, cred); 259 return 0; 260 } 261 262 /* 263 * Common code for mount and mountroot 264 */ 265 static int 266 iso_mountfs(struct vnode *devvp, struct mount *mp, struct iso_args *argp) 267 { 268 struct iso_mnt *isomp = NULL; 269 struct buf *bp = NULL; 270 struct buf *pribp = NULL, *supbp = NULL; 271 cdev_t dev; 272 int error = EINVAL; 273 int needclose = 0; 274 int high_sierra = 0; 275 int iso_bsize; 276 int iso_blknum; 277 int joliet_level; 278 struct iso_volume_descriptor *vdp = 0; 279 struct iso_primary_descriptor *pri = NULL; 280 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 281 struct iso_supplementary_descriptor *sup = NULL; 282 struct iso_directory_record *rootp; 283 int logical_block_size; 284 285 if (!(mp->mnt_flag & MNT_RDONLY)) 286 return EROFS; 287 288 /* 289 * Disallow multiple mounts of the same device. 290 * Disallow mounting of a device that is currently in use 291 * Flush out any old buffers remaining from a previous use. 292 */ 293 if ((error = vfs_mountedon(devvp))) 294 return error; 295 if (count_udev(devvp->v_umajor, devvp->v_uminor) > 0) 296 return EBUSY; 297 if ((error = vinvalbuf(devvp, V_SAVE, 0, 0))) 298 return (error); 299 300 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 301 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL); 302 vn_unlock(devvp); 303 if (error) 304 return error; 305 dev = devvp->v_rdev; 306 if (dev->si_iosize_max != 0) 307 mp->mnt_iosize_max = dev->si_iosize_max; 308 if (mp->mnt_iosize_max > MAXPHYS) 309 mp->mnt_iosize_max = MAXPHYS; 310 311 needclose = 1; 312 313 /* This is the "logical sector size". The standard says this 314 * should be 2048 or the physical sector size on the device, 315 * whichever is greater. For now, we'll just use a constant. 316 */ 317 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 318 319 joliet_level = 0; 320 for (iso_blknum = 16 + argp->ssector; 321 iso_blknum < 100 + argp->ssector; 322 iso_blknum++) { 323 if ((error = bread(devvp, (off_t)iso_blknum * iso_bsize, 324 iso_bsize, &bp)) != 0) 325 goto out; 326 327 vdp = (struct iso_volume_descriptor *)bp->b_data; 328 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 329 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 330 sizeof vdp->id) != 0) { 331 error = EINVAL; 332 goto out; 333 } else 334 high_sierra = 1; 335 } 336 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 337 case ISO_VD_PRIMARY: 338 if (pribp == NULL) { 339 pribp = bp; 340 bp = NULL; 341 pri = (struct iso_primary_descriptor *)vdp; 342 pri_sierra = 343 (struct iso_sierra_primary_descriptor *)vdp; 344 } 345 break; 346 347 case ISO_VD_SUPPLEMENTARY: 348 if (supbp == NULL) { 349 supbp = bp; 350 bp = NULL; 351 sup = (struct iso_supplementary_descriptor *)vdp; 352 353 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 354 if (bcmp(sup->escape, "%/@", 3) == 0) 355 joliet_level = 1; 356 if (bcmp(sup->escape, "%/C", 3) == 0) 357 joliet_level = 2; 358 if (bcmp(sup->escape, "%/E", 3) == 0) 359 joliet_level = 3; 360 361 if ((isonum_711 (sup->flags) & 1) && 362 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 363 joliet_level = 0; 364 } 365 } 366 break; 367 368 case ISO_VD_END: 369 goto vd_end; 370 371 default: 372 break; 373 } 374 if (bp) { 375 brelse(bp); 376 bp = NULL; 377 } 378 } 379 vd_end: 380 if (bp) { 381 brelse(bp); 382 bp = NULL; 383 } 384 385 if (pri == NULL) { 386 error = EINVAL; 387 goto out; 388 } 389 390 logical_block_size = 391 isonum_723 (high_sierra? 392 pri_sierra->logical_block_size: 393 pri->logical_block_size); 394 395 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 396 || (logical_block_size & (logical_block_size - 1)) != 0) { 397 error = EINVAL; 398 goto out; 399 } 400 401 rootp = (struct iso_directory_record *) 402 (high_sierra? 403 pri_sierra->root_directory_record: 404 pri->root_directory_record); 405 406 isomp = kmalloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 407 isomp->logical_block_size = logical_block_size; 408 isomp->volume_space_size = 409 isonum_733 (high_sierra? 410 pri_sierra->volume_space_size: 411 pri->volume_space_size); 412 isomp->joliet_level = 0; 413 /* 414 * Since an ISO9660 multi-session CD can also access previous 415 * sessions, we have to include them into the space consider- 416 * ations. This doesn't yield a very accurate number since 417 * parts of the old sessions might be inaccessible now, but we 418 * can't do much better. This is also important for the NFS 419 * filehandle validation. 420 */ 421 isomp->volume_space_size += argp->ssector; 422 bcopy (rootp, isomp->root, sizeof isomp->root); 423 isomp->root_extent = isonum_733 (rootp->extent); 424 isomp->root_size = isonum_733 (rootp->size); 425 426 isomp->im_bmask = logical_block_size - 1; 427 isomp->im_bshift = ffs(logical_block_size) - 1; 428 429 pribp->b_flags |= B_AGE; 430 brelse(pribp); 431 pribp = NULL; 432 433 mp->mnt_data = (qaddr_t)isomp; 434 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 435 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 436 mp->mnt_maxsymlinklen = 0; 437 mp->mnt_flag |= MNT_LOCAL; 438 isomp->im_mountp = mp; 439 isomp->im_dev = dev; 440 isomp->im_devvp = devvp; 441 442 dev->si_mountpoint = mp; 443 444 /* Check the Rock Ridge Extention support */ 445 if (!(argp->flags & ISOFSMNT_NORRIP)) { 446 if ((error = bread(isomp->im_devvp, 447 lblktooff(isomp, isomp->root_extent + isonum_711(rootp->ext_attr_length)), 448 isomp->logical_block_size, &bp)) != 0) 449 goto out; 450 451 rootp = (struct iso_directory_record *)bp->b_data; 452 453 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 454 argp->flags |= ISOFSMNT_NORRIP; 455 } else { 456 argp->flags &= ~ISOFSMNT_GENS; 457 } 458 459 /* 460 * The contents are valid, 461 * but they will get reread as part of another vnode, so... 462 */ 463 bp->b_flags |= B_AGE; 464 brelse(bp); 465 bp = NULL; 466 } 467 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 468 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 469 470 if (high_sierra) { 471 /* this effectively ignores all the mount flags */ 472 log(LOG_INFO, "cd9660: High Sierra Format\n"); 473 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 474 } else { 475 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 476 default: 477 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 478 break; 479 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 480 isomp->iso_ftype = ISO_FTYPE_9660; 481 break; 482 case 0: 483 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 484 isomp->iso_ftype = ISO_FTYPE_RRIP; 485 break; 486 } 487 } 488 489 /* Decide whether to use the Joliet descriptor */ 490 491 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 492 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 493 rootp = (struct iso_directory_record *) 494 sup->root_directory_record; 495 bcopy (rootp, isomp->root, sizeof isomp->root); 496 isomp->root_extent = isonum_733 (rootp->extent); 497 isomp->root_size = isonum_733 (rootp->size); 498 isomp->joliet_level = joliet_level; 499 supbp->b_flags |= B_AGE; 500 } 501 502 if (supbp) { 503 brelse(supbp); 504 supbp = NULL; 505 } 506 507 vfs_add_vnodeops(mp, &cd9660_vnode_vops, &mp->mnt_vn_norm_ops); 508 vfs_add_vnodeops(mp, &cd9660_spec_vops, &mp->mnt_vn_spec_ops); 509 vfs_add_vnodeops(mp, &cd9660_fifo_vops, &mp->mnt_vn_fifo_ops); 510 511 return 0; 512 out: 513 dev->si_mountpoint = NULL; 514 if (bp) 515 brelse(bp); 516 if (pribp) 517 brelse(pribp); 518 if (supbp) 519 brelse(supbp); 520 if (needclose) 521 VOP_CLOSE(devvp, FREAD); 522 if (isomp) { 523 kfree((caddr_t)isomp, M_ISOFSMNT); 524 mp->mnt_data = (qaddr_t)0; 525 } 526 return error; 527 } 528 529 /* 530 * unmount system call 531 */ 532 static int 533 cd9660_unmount(struct mount *mp, int mntflags) 534 { 535 struct iso_mnt *isomp; 536 int error, flags = 0; 537 538 if (mntflags & MNT_FORCE) 539 flags |= FORCECLOSE; 540 #if 0 541 mntflushbuf(mp, 0); 542 if (mntinvalbuf(mp)) 543 return EBUSY; 544 #endif 545 if ((error = vflush(mp, 0, flags))) 546 return (error); 547 548 isomp = VFSTOISOFS(mp); 549 550 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 551 error = VOP_CLOSE(isomp->im_devvp, FREAD); 552 vrele(isomp->im_devvp); 553 kfree((caddr_t)isomp, M_ISOFSMNT); 554 mp->mnt_data = (qaddr_t)0; 555 mp->mnt_flag &= ~MNT_LOCAL; 556 return (error); 557 } 558 559 /* 560 * Return root of a filesystem 561 */ 562 static int 563 cd9660_root(struct mount *mp, struct vnode **vpp) 564 { 565 struct iso_mnt *imp = VFSTOISOFS(mp); 566 struct iso_directory_record *dp = 567 (struct iso_directory_record *)imp->root; 568 ino_t ino = isodirino(dp, imp); 569 570 /* 571 * With RRIP we must use the `.' entry of the root directory. 572 * Simply tell vget, that it's a relocated directory. 573 */ 574 return (cd9660_vget_internal(mp, ino, vpp, 575 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 576 } 577 578 /* 579 * Get file system statistics. 580 */ 581 int 582 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 583 { 584 struct iso_mnt *isomp; 585 586 isomp = VFSTOISOFS(mp); 587 588 sbp->f_bsize = isomp->logical_block_size; 589 sbp->f_iosize = sbp->f_bsize; /* XXX */ 590 sbp->f_blocks = isomp->volume_space_size; 591 sbp->f_bfree = 0; /* total free blocks */ 592 sbp->f_bavail = 0; /* blocks free for non superuser */ 593 sbp->f_files = 0; /* total files */ 594 sbp->f_ffree = 0; /* free file nodes */ 595 if (sbp != &mp->mnt_stat) { 596 sbp->f_type = mp->mnt_vfc->vfc_typenum; 597 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 598 } 599 return 0; 600 } 601 602 /* 603 * File handle to vnode 604 * 605 * Have to be really careful about stale file handles: 606 * - check that the inode number is in range 607 * - call iget() to get the locked inode 608 * - check for an unallocated inode (i_mode == 0) 609 * - check that the generation number matches 610 */ 611 612 struct ifid { 613 ushort ifid_len; 614 ushort ifid_pad; 615 int ifid_ino; 616 long ifid_start; 617 }; 618 619 /* ARGSUSED */ 620 int 621 cd9660_fhtovp(struct mount *mp, struct vnode *rootvp, 622 struct fid *fhp, struct vnode **vpp) 623 { 624 struct ifid *ifhp = (struct ifid *)fhp; 625 struct iso_node *ip; 626 struct vnode *nvp; 627 int error; 628 629 #ifdef ISOFS_DBG 630 kprintf("fhtovp: ino %d, start %ld\n", 631 ifhp->ifid_ino, ifhp->ifid_start); 632 #endif 633 634 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 635 *vpp = NULLVP; 636 return (error); 637 } 638 ip = VTOI(nvp); 639 if (ip->inode.iso_mode == 0) { 640 vput(nvp); 641 *vpp = NULLVP; 642 return (ESTALE); 643 } 644 *vpp = nvp; 645 return (0); 646 } 647 648 int 649 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp, 650 struct ucred **credanonp) 651 { 652 struct netcred *np; 653 struct iso_mnt *imp; 654 655 imp = VFSTOISOFS(mp); 656 657 /* 658 * Get the export permission structure for this <mp, client> tuple. 659 */ 660 np = vfs_export_lookup(mp, &imp->im_export, nam); 661 if (np == NULL) 662 return (EACCES); 663 664 *exflagsp = np->netc_exflags; 665 *credanonp = &np->netc_anon; 666 return (0); 667 } 668 669 int 670 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 671 { 672 673 /* 674 * XXXX 675 * It would be nice if we didn't always set the `relocated' flag 676 * and force the extra read, but I don't want to think about fixing 677 * that right now. 678 */ 679 return (cd9660_vget_internal(mp, ino, vpp, 680 #if 0 681 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 682 #else 683 0, 684 #endif 685 NULL)); 686 } 687 688 int 689 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 690 int relocated, struct iso_directory_record *isodir) 691 { 692 struct iso_mnt *imp; 693 struct iso_node *ip; 694 struct buf *bp; 695 struct vnode *vp; 696 cdev_t dev; 697 int error; 698 699 imp = VFSTOISOFS(mp); 700 dev = imp->im_dev; 701 again: 702 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 703 return (0); 704 705 /* Allocate a new vnode/iso_node. */ 706 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0); 707 if (error) { 708 *vpp = NULLVP; 709 return (error); 710 } 711 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 712 M_WAITOK | M_ZERO); 713 ip->i_vnode = vp; 714 ip->i_dev = dev; 715 ip->i_number = ino; 716 717 /* 718 * Insert it into the inode hash table and check for a collision. 719 * If a collision occurs, throw away the vnode and try again. 720 */ 721 if (cd9660_ihashins(ip) != 0) { 722 kprintf("debug: cd9660 ihashins collision, retrying\n"); 723 vx_put(vp); 724 kfree(ip, M_ISOFSNODE); 725 goto again; 726 } 727 vp->v_data = ip; 728 729 if (isodir == NULL) { 730 int lbn, off; 731 732 lbn = lblkno(imp, ino); 733 if (lbn >= imp->volume_space_size) { 734 vx_put(vp); 735 kprintf("fhtovp: lbn exceed volume space %d\n", lbn); 736 return (ESTALE); 737 } 738 739 off = blkoff(imp, ino); 740 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 741 vx_put(vp); 742 kprintf("fhtovp: crosses block boundary %d\n", 743 off + ISO_DIRECTORY_RECORD_SIZE); 744 return (ESTALE); 745 } 746 747 error = bread(imp->im_devvp, 748 lblktooff(imp, lbn), 749 imp->logical_block_size, &bp); 750 if (error) { 751 vx_put(vp); 752 brelse(bp); 753 kprintf("fhtovp: bread error %d\n",error); 754 return (error); 755 } 756 isodir = (struct iso_directory_record *)(bp->b_data + off); 757 758 if (off + isonum_711(isodir->length) > 759 imp->logical_block_size) { 760 vx_put(vp); 761 if (bp != NULL) 762 brelse(bp); 763 kprintf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 764 off +isonum_711(isodir->length), off, 765 isonum_711(isodir->length)); 766 return (ESTALE); 767 } 768 769 #if 0 770 if (isonum_733(isodir->extent) + 771 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 772 if (bp != NULL) 773 brelse(bp); 774 kprintf("fhtovp: file start miss %d vs %d\n", 775 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 776 ifhp->ifid_start); 777 return (ESTALE); 778 } 779 #endif 780 } else 781 bp = 0; 782 783 ip->i_mnt = imp; 784 ip->i_devvp = imp->im_devvp; 785 vref(ip->i_devvp); 786 787 if (relocated) { 788 /* 789 * On relocated directories we must 790 * read the `.' entry out of a dir. 791 */ 792 ip->iso_start = ino >> imp->im_bshift; 793 if (bp != NULL) 794 brelse(bp); 795 if ((error = cd9660_devblkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 796 vx_put(vp); 797 return (error); 798 } 799 isodir = (struct iso_directory_record *)bp->b_data; 800 } 801 802 ip->iso_extent = isonum_733(isodir->extent); 803 ip->i_size = isonum_733(isodir->size); 804 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 805 806 /* 807 * Setup time stamp, attribute 808 */ 809 vp->v_type = VNON; 810 switch (imp->iso_ftype) { 811 default: /* ISO_FTYPE_9660 */ 812 { 813 struct buf *bp2; 814 int off; 815 if ((imp->im_flags & ISOFSMNT_EXTATT) 816 && (off = isonum_711(isodir->ext_attr_length))) 817 cd9660_devblkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 818 &bp2); 819 else 820 bp2 = NULL; 821 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 822 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 823 if (bp2) 824 brelse(bp2); 825 break; 826 } 827 case ISO_FTYPE_RRIP: 828 cd9660_rrip_analyze(isodir, ip, imp); 829 break; 830 } 831 832 if (bp != NULL) 833 brelse(bp); 834 835 /* 836 * Initialize the associated vnode 837 */ 838 vp->v_type = IFTOVT(ip->inode.iso_mode); 839 840 switch (vp->v_type) { 841 case VFIFO: 842 vp->v_ops = &mp->mnt_vn_fifo_ops; 843 break; 844 case VCHR: 845 case VBLK: 846 vp->v_ops = &mp->mnt_vn_spec_ops; 847 addaliasu(vp, umajor(ip->inode.iso_rdev), 848 uminor(ip->inode.iso_rdev)); 849 break; 850 case VREG: 851 case VDIR: 852 vinitvmio(vp, ip->i_size); 853 break; 854 default: 855 break; 856 } 857 858 if (ip->iso_extent == imp->root_extent) 859 vp->v_flag |= VROOT; 860 861 /* 862 * Return the locked and refd vp 863 */ 864 *vpp = vp; 865 return (0); 866 } 867 868 /* 869 * Vnode pointer to File handle 870 */ 871 /* ARGSUSED */ 872 int 873 cd9660_vptofh(struct vnode *vp, struct fid *fhp) 874 { 875 struct iso_node *ip = VTOI(vp); 876 struct ifid *ifhp; 877 878 ifhp = (struct ifid *)fhp; 879 ifhp->ifid_len = sizeof(struct ifid); 880 881 ifhp->ifid_ino = ip->i_number; 882 ifhp->ifid_start = ip->iso_start; 883 884 #ifdef ISOFS_DBG 885 kprintf("vptofh: ino %d, start %ld\n", 886 ifhp->ifid_ino,ifhp->ifid_start); 887 #endif 888 return 0; 889 } 890