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/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 vnode *rootvp, 78 struct fid *, struct vnode **); 79 static int cd9660_checkexp (struct mount *, struct sockaddr *, 80 int *, struct ucred **); 81 static int cd9660_vptofh (struct vnode *, struct fid *); 82 83 static struct vfsops cd9660_vfsops = { 84 .vfs_mount = cd9660_mount, 85 .vfs_unmount = cd9660_unmount, 86 .vfs_root = cd9660_root, 87 .vfs_statfs = cd9660_statfs, 88 .vfs_sync = vfs_stdsync, 89 .vfs_vget = cd9660_vget, 90 .vfs_fhtovp = cd9660_fhtovp, 91 .vfs_checkexp = cd9660_checkexp, 92 .vfs_vptofh = cd9660_vptofh, 93 .vfs_init = cd9660_init, 94 .vfs_uninit = cd9660_uninit, 95 }; 96 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 97 MODULE_VERSION(cd9660, 1); 98 99 100 /* 101 * Called by vfs_mountroot when iso is going to be mounted as root. 102 */ 103 104 static int iso_get_ssector (cdev_t dev); 105 static int iso_mountfs (struct vnode *devvp, struct mount *mp, 106 struct iso_args *argp); 107 108 /* 109 * Try to find the start of the last data track on this CD-ROM. This 110 * is used to mount the last session of a multi-session CD. Bail out 111 * and return 0 if we fail, this is always a safe bet. 112 */ 113 static int 114 iso_get_ssector(cdev_t dev) 115 { 116 struct ioc_toc_header h; 117 struct ioc_read_toc_single_entry t; 118 int i; 119 120 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, proc0.p_ucred) != 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, proc0.p_ucred) != 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 kprintf("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 vn_unlock(rootvp); 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 kprintf("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_nch, 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 vn_unlock(devvp); 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 cdev_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_umajor, devvp->v_uminor) > 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 vn_unlock(devvp); 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 = kmalloc(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, &cd9660_vnode_vops, &mp->mnt_vn_norm_ops); 507 vfs_add_vnodeops(mp, &cd9660_spec_vops, &mp->mnt_vn_spec_ops); 508 vfs_add_vnodeops(mp, &cd9660_fifo_vops, &mp->mnt_vn_fifo_ops); 509 510 return 0; 511 out: 512 dev->si_mountpoint = NULL; 513 if (bp) 514 brelse(bp); 515 if (pribp) 516 brelse(pribp); 517 if (supbp) 518 brelse(supbp); 519 if (needclose) 520 VOP_CLOSE(devvp, FREAD); 521 if (isomp) { 522 kfree((caddr_t)isomp, M_ISOFSMNT); 523 mp->mnt_data = (qaddr_t)0; 524 } 525 return error; 526 } 527 528 /* 529 * unmount system call 530 */ 531 static int 532 cd9660_unmount(struct mount *mp, int mntflags) 533 { 534 struct iso_mnt *isomp; 535 int error, flags = 0; 536 537 if (mntflags & MNT_FORCE) 538 flags |= FORCECLOSE; 539 #if 0 540 mntflushbuf(mp, 0); 541 if (mntinvalbuf(mp)) 542 return EBUSY; 543 #endif 544 if ((error = vflush(mp, 0, flags))) 545 return (error); 546 547 isomp = VFSTOISOFS(mp); 548 549 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 550 error = VOP_CLOSE(isomp->im_devvp, FREAD); 551 vrele(isomp->im_devvp); 552 kfree((caddr_t)isomp, M_ISOFSMNT); 553 mp->mnt_data = (qaddr_t)0; 554 mp->mnt_flag &= ~MNT_LOCAL; 555 return (error); 556 } 557 558 /* 559 * Return root of a filesystem 560 */ 561 static int 562 cd9660_root(struct mount *mp, struct vnode **vpp) 563 { 564 struct iso_mnt *imp = VFSTOISOFS(mp); 565 struct iso_directory_record *dp = 566 (struct iso_directory_record *)imp->root; 567 ino_t ino = isodirino(dp, imp); 568 569 /* 570 * With RRIP we must use the `.' entry of the root directory. 571 * Simply tell vget, that it's a relocated directory. 572 */ 573 return (cd9660_vget_internal(mp, ino, vpp, 574 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 575 } 576 577 /* 578 * Get file system statistics. 579 */ 580 int 581 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 582 { 583 struct iso_mnt *isomp; 584 585 isomp = VFSTOISOFS(mp); 586 587 sbp->f_bsize = isomp->logical_block_size; 588 sbp->f_iosize = sbp->f_bsize; /* XXX */ 589 sbp->f_blocks = isomp->volume_space_size; 590 sbp->f_bfree = 0; /* total free blocks */ 591 sbp->f_bavail = 0; /* blocks free for non superuser */ 592 sbp->f_files = 0; /* total files */ 593 sbp->f_ffree = 0; /* free file nodes */ 594 if (sbp != &mp->mnt_stat) { 595 sbp->f_type = mp->mnt_vfc->vfc_typenum; 596 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 597 } 598 return 0; 599 } 600 601 /* 602 * File handle to vnode 603 * 604 * Have to be really careful about stale file handles: 605 * - check that the inode number is in range 606 * - call iget() to get the locked inode 607 * - check for an unallocated inode (i_mode == 0) 608 * - check that the generation number matches 609 */ 610 611 struct ifid { 612 ushort ifid_len; 613 ushort ifid_pad; 614 int ifid_ino; 615 long ifid_start; 616 }; 617 618 /* ARGSUSED */ 619 int 620 cd9660_fhtovp(struct mount *mp, struct vnode *rootvp, 621 struct fid *fhp, struct vnode **vpp) 622 { 623 struct ifid *ifhp = (struct ifid *)fhp; 624 struct iso_node *ip; 625 struct vnode *nvp; 626 int error; 627 628 #ifdef ISOFS_DBG 629 kprintf("fhtovp: ino %d, start %ld\n", 630 ifhp->ifid_ino, ifhp->ifid_start); 631 #endif 632 633 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 634 *vpp = NULLVP; 635 return (error); 636 } 637 ip = VTOI(nvp); 638 if (ip->inode.iso_mode == 0) { 639 vput(nvp); 640 *vpp = NULLVP; 641 return (ESTALE); 642 } 643 *vpp = nvp; 644 return (0); 645 } 646 647 int 648 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp, 649 struct ucred **credanonp) 650 { 651 struct netcred *np; 652 struct iso_mnt *imp; 653 654 imp = VFSTOISOFS(mp); 655 656 /* 657 * Get the export permission structure for this <mp, client> tuple. 658 */ 659 np = vfs_export_lookup(mp, &imp->im_export, nam); 660 if (np == NULL) 661 return (EACCES); 662 663 *exflagsp = np->netc_exflags; 664 *credanonp = &np->netc_anon; 665 return (0); 666 } 667 668 int 669 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 670 { 671 672 /* 673 * XXXX 674 * It would be nice if we didn't always set the `relocated' flag 675 * and force the extra read, but I don't want to think about fixing 676 * that right now. 677 */ 678 return (cd9660_vget_internal(mp, ino, vpp, 679 #if 0 680 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 681 #else 682 0, 683 #endif 684 (struct iso_directory_record *)0)); 685 } 686 687 int 688 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 689 int relocated, struct iso_directory_record *isodir) 690 { 691 struct iso_mnt *imp; 692 struct iso_node *ip; 693 struct buf *bp; 694 struct vnode *vp; 695 cdev_t dev; 696 int error; 697 698 imp = VFSTOISOFS(mp); 699 dev = imp->im_dev; 700 again: 701 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 702 return (0); 703 704 /* Allocate a new vnode/iso_node. */ 705 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0); 706 if (error) { 707 *vpp = NULLVP; 708 return (error); 709 } 710 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 711 M_WAITOK | M_ZERO); 712 ip->i_vnode = vp; 713 ip->i_dev = dev; 714 ip->i_number = ino; 715 716 /* 717 * Insert it into the inode hash table and check for a collision. 718 * If a collision occurs, throw away the vnode and try again. 719 */ 720 if (cd9660_ihashins(ip) != 0) { 721 kprintf("debug: cd9660 ihashins collision, retrying\n"); 722 vx_put(vp); 723 kfree(ip, M_ISOFSNODE); 724 goto again; 725 } 726 vp->v_data = ip; 727 728 if (isodir == NULL) { 729 int lbn, off; 730 731 lbn = lblkno(imp, ino); 732 if (lbn >= imp->volume_space_size) { 733 vx_put(vp); 734 kprintf("fhtovp: lbn exceed volume space %d\n", lbn); 735 return (ESTALE); 736 } 737 738 off = blkoff(imp, ino); 739 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 740 vx_put(vp); 741 kprintf("fhtovp: crosses block boundary %d\n", 742 off + ISO_DIRECTORY_RECORD_SIZE); 743 return (ESTALE); 744 } 745 746 error = bread(imp->im_devvp, 747 lblktooff(imp, lbn), 748 imp->logical_block_size, &bp); 749 if (error) { 750 vx_put(vp); 751 brelse(bp); 752 kprintf("fhtovp: bread error %d\n",error); 753 return (error); 754 } 755 isodir = (struct iso_directory_record *)(bp->b_data + off); 756 757 if (off + isonum_711(isodir->length) > 758 imp->logical_block_size) { 759 vx_put(vp); 760 if (bp != NULL) 761 brelse(bp); 762 kprintf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 763 off +isonum_711(isodir->length), off, 764 isonum_711(isodir->length)); 765 return (ESTALE); 766 } 767 768 #if 0 769 if (isonum_733(isodir->extent) + 770 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 771 if (bp != NULL) 772 brelse(bp); 773 kprintf("fhtovp: file start miss %d vs %d\n", 774 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 775 ifhp->ifid_start); 776 return (ESTALE); 777 } 778 #endif 779 } else 780 bp = 0; 781 782 ip->i_mnt = imp; 783 ip->i_devvp = imp->im_devvp; 784 vref(ip->i_devvp); 785 786 if (relocated) { 787 /* 788 * On relocated directories we must 789 * read the `.' entry out of a dir. 790 */ 791 ip->iso_start = ino >> imp->im_bshift; 792 if (bp != NULL) 793 brelse(bp); 794 if ((error = cd9660_devblkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 795 vx_put(vp); 796 return (error); 797 } 798 isodir = (struct iso_directory_record *)bp->b_data; 799 } 800 801 ip->iso_extent = isonum_733(isodir->extent); 802 ip->i_size = isonum_733(isodir->size); 803 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 804 805 /* 806 * Setup time stamp, attribute 807 */ 808 vp->v_type = VNON; 809 switch (imp->iso_ftype) { 810 default: /* ISO_FTYPE_9660 */ 811 { 812 struct buf *bp2; 813 int off; 814 if ((imp->im_flags & ISOFSMNT_EXTATT) 815 && (off = isonum_711(isodir->ext_attr_length))) 816 cd9660_devblkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 817 &bp2); 818 else 819 bp2 = NULL; 820 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 821 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 822 if (bp2) 823 brelse(bp2); 824 break; 825 } 826 case ISO_FTYPE_RRIP: 827 cd9660_rrip_analyze(isodir, ip, imp); 828 break; 829 } 830 831 if (bp != NULL) 832 brelse(bp); 833 834 /* 835 * Initialize the associated vnode 836 */ 837 vp->v_type = IFTOVT(ip->inode.iso_mode); 838 839 switch (vp->v_type) { 840 case VFIFO: 841 vp->v_ops = &mp->mnt_vn_fifo_ops; 842 break; 843 case VCHR: 844 case VBLK: 845 vp->v_ops = &mp->mnt_vn_spec_ops; 846 addaliasu(vp, umajor(ip->inode.iso_rdev), 847 uminor(ip->inode.iso_rdev)); 848 break; 849 case VREG: 850 case VDIR: 851 vinitvmio(vp, ip->i_size); 852 break; 853 default: 854 break; 855 } 856 857 if (ip->iso_extent == imp->root_extent) 858 vp->v_flag |= VROOT; 859 860 /* 861 * Return the locked and refd vp 862 */ 863 *vpp = vp; 864 return (0); 865 } 866 867 /* 868 * Vnode pointer to File handle 869 */ 870 /* ARGSUSED */ 871 int 872 cd9660_vptofh(struct vnode *vp, struct fid *fhp) 873 { 874 struct iso_node *ip = VTOI(vp); 875 struct ifid *ifhp; 876 877 ifhp = (struct ifid *)fhp; 878 ifhp->ifid_len = sizeof(struct ifid); 879 880 ifhp->ifid_ino = ip->i_number; 881 ifhp->ifid_start = ip->iso_start; 882 883 #ifdef ISOFS_DBG 884 kprintf("vptofh: ino %d, start %ld\n", 885 ifhp->ifid_ino,ifhp->ifid_start); 886 #endif 887 return 0; 888 } 889