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 1.24 2004/12/17 00:18:23 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 vnodeopv_entry_desc cd9660_vnodeop_entries[]; 66 extern struct vnodeopv_entry_desc cd9660_specop_entries[]; 67 extern struct vnodeopv_entry_desc cd9660_fifoop_entries[]; 68 69 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 70 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part"); 71 72 static int cd9660_mount (struct mount *, char *, caddr_t, struct thread *); 73 static int cd9660_unmount (struct mount *, int, struct thread *); 74 static int cd9660_root (struct mount *, struct vnode **); 75 static int cd9660_statfs (struct mount *, struct statfs *, struct thread *); 76 static int cd9660_vget (struct mount *, ino_t, struct vnode **); 77 static int cd9660_fhtovp (struct mount *, struct fid *, struct vnode **); 78 static int cd9660_checkexp (struct mount *, struct sockaddr *, 79 int *, struct ucred **); 80 static int cd9660_vptofh (struct vnode *, struct fid *); 81 82 static struct vfsops cd9660_vfsops = { 83 cd9660_mount, 84 vfs_stdstart, 85 cd9660_unmount, 86 cd9660_root, 87 vfs_stdquotactl, 88 cd9660_statfs, 89 vfs_stdsync, 90 cd9660_vget, 91 cd9660_fhtovp, 92 cd9660_checkexp, 93 cd9660_vptofh, 94 cd9660_init, 95 cd9660_uninit, 96 vfs_stdextattrctl, 97 }; 98 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 99 MODULE_VERSION(cd9660, 1); 100 101 102 /* 103 * Called by vfs_mountroot when iso is going to be mounted as root. 104 */ 105 106 static int iso_get_ssector (dev_t dev, struct thread *td); 107 static int iso_mountfs (struct vnode *devvp, struct mount *mp, 108 struct thread *td, struct iso_args *argp); 109 110 /* 111 * Try to find the start of the last data track on this CD-ROM. This 112 * is used to mount the last session of a multi-session CD. Bail out 113 * and return 0 if we fail, this is always a safe bet. 114 */ 115 static int 116 iso_get_ssector(dev_t dev, struct thread *td) 117 { 118 struct ioc_toc_header h; 119 struct ioc_read_toc_single_entry t; 120 int i; 121 122 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0) 123 return 0; 124 125 for (i = h.ending_track; i >= 0; i--) { 126 t.address_format = CD_LBA_FORMAT; 127 t.track = i; 128 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) { 129 return 0; 130 } 131 if ((t.entry.control & 4) != 0) 132 /* found a data track */ 133 break; 134 } 135 136 if (i < 0) 137 return 0; 138 139 return ntohl(t.entry.addr.lba); 140 } 141 142 static int iso_mountroot (struct mount *mp, struct thread *td); 143 144 static int 145 iso_mountroot(struct mount *mp, struct thread *td) 146 { 147 struct iso_args args; 148 struct vnode *rootvp; 149 int error; 150 151 if ((error = bdevvp(rootdev, &rootvp))) { 152 printf("iso_mountroot: can't find rootvp\n"); 153 return (error); 154 } 155 args.flags = ISOFSMNT_ROOT; 156 157 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td); 158 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL, td); 159 VOP_UNLOCK(rootvp, 0, td); 160 if (error) 161 return (error); 162 163 args.ssector = iso_get_ssector(rootdev, td); 164 165 (void)VOP_CLOSE(rootvp, FREAD, td); 166 167 if (bootverbose) 168 printf("iso_mountroot(): using session at block %d\n", 169 args.ssector); 170 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0) 171 return (error); 172 173 (void)cd9660_statfs(mp, &mp->mnt_stat, td); 174 return (0); 175 } 176 177 /* 178 * VFS Operations. 179 * 180 * mount system call 181 */ 182 static int 183 cd9660_mount(struct mount *mp, char *path, caddr_t data, struct thread *td) 184 { 185 struct vnode *devvp; 186 struct iso_args args; 187 size_t size; 188 int error; 189 mode_t accessmode; 190 struct iso_mnt *imp = 0; 191 struct nlookupdata nd; 192 193 if ((mp->mnt_flag & MNT_ROOTFS) != 0) { 194 return (iso_mountroot(mp, td)); 195 } 196 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 197 return (error); 198 199 if ((mp->mnt_flag & MNT_RDONLY) == 0) 200 return (EROFS); 201 202 KKASSERT(td->td_proc); 203 204 /* 205 * If updating, check whether changing from read-only to 206 * read/write; if there is no device name, that's all we do. 207 */ 208 if (mp->mnt_flag & MNT_UPDATE) { 209 imp = VFSTOISOFS(mp); 210 if (args.fspec == 0) 211 return (vfs_export(mp, &imp->im_export, &args.export)); 212 } 213 /* 214 * Not an update, or updating the name: look up the name 215 * and verify that it refers to a sensible block device. 216 */ 217 devvp = NULL; 218 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW); 219 if (error == 0) 220 error = nlookup(&nd); 221 if (error == 0) 222 error = cache_vref(nd.nl_ncp, nd.nl_cred, &devvp); 223 nlookup_done(&nd); 224 if (error) 225 return (error); 226 227 if (!vn_isdisk(devvp, &error)) { 228 vrele(devvp); 229 return (error); 230 } 231 232 /* 233 * Verify that user has necessary permissions on the device, 234 * or has superuser abilities 235 */ 236 accessmode = VREAD; 237 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 238 error = VOP_ACCESS(devvp, accessmode, td->td_proc->p_ucred, td); 239 if (error) 240 error = suser(td); 241 if (error) { 242 vput(devvp); 243 return (error); 244 } 245 VOP_UNLOCK(devvp, 0, td); 246 247 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 248 error = iso_mountfs(devvp, mp, td, &args); 249 } else { 250 if (devvp != imp->im_devvp) 251 error = EINVAL; /* needs translation */ 252 else 253 vrele(devvp); 254 } 255 if (error) { 256 vrele(devvp); 257 return error; 258 } 259 imp = VFSTOISOFS(mp); 260 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 261 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 262 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 263 &size); 264 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 265 (void) cd9660_statfs(mp, &mp->mnt_stat, td); 266 return 0; 267 } 268 269 /* 270 * Common code for mount and mountroot 271 */ 272 static int 273 iso_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td, 274 struct iso_args *argp) 275 { 276 struct iso_mnt *isomp = NULL; 277 struct buf *bp = NULL; 278 struct buf *pribp = NULL, *supbp = NULL; 279 dev_t dev; 280 int error = EINVAL; 281 int needclose = 0; 282 int high_sierra = 0; 283 int iso_bsize; 284 int iso_blknum; 285 int joliet_level; 286 struct iso_volume_descriptor *vdp = 0; 287 struct iso_primary_descriptor *pri = NULL; 288 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 289 struct iso_supplementary_descriptor *sup = NULL; 290 struct iso_directory_record *rootp; 291 int logical_block_size; 292 293 if (!(mp->mnt_flag & MNT_RDONLY)) 294 return EROFS; 295 296 /* 297 * Disallow multiple mounts of the same device. 298 * Disallow mounting of a device that is currently in use 299 * Flush out any old buffers remaining from a previous use. 300 */ 301 if ((error = vfs_mountedon(devvp))) 302 return error; 303 if (count_udev(devvp->v_udev) > 0) 304 return EBUSY; 305 if ((error = vinvalbuf(devvp, V_SAVE, td, 0, 0))) 306 return (error); 307 308 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 309 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL, td); 310 VOP_UNLOCK(devvp, 0, td); 311 if (error) 312 return error; 313 dev = devvp->v_rdev; 314 if (dev->si_iosize_max != 0) 315 mp->mnt_iosize_max = dev->si_iosize_max; 316 if (mp->mnt_iosize_max > MAXPHYS) 317 mp->mnt_iosize_max = MAXPHYS; 318 319 needclose = 1; 320 321 /* This is the "logical sector size". The standard says this 322 * should be 2048 or the physical sector size on the device, 323 * whichever is greater. For now, we'll just use a constant. 324 */ 325 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 326 327 joliet_level = 0; 328 for (iso_blknum = 16 + argp->ssector; 329 iso_blknum < 100 + argp->ssector; 330 iso_blknum++) { 331 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 332 iso_bsize, &bp)) != 0) 333 goto out; 334 335 vdp = (struct iso_volume_descriptor *)bp->b_data; 336 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 337 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 338 sizeof vdp->id) != 0) { 339 error = EINVAL; 340 goto out; 341 } else 342 high_sierra = 1; 343 } 344 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 345 case ISO_VD_PRIMARY: 346 if (pribp == NULL) { 347 pribp = bp; 348 bp = NULL; 349 pri = (struct iso_primary_descriptor *)vdp; 350 pri_sierra = 351 (struct iso_sierra_primary_descriptor *)vdp; 352 } 353 break; 354 355 case ISO_VD_SUPPLEMENTARY: 356 if (supbp == NULL) { 357 supbp = bp; 358 bp = NULL; 359 sup = (struct iso_supplementary_descriptor *)vdp; 360 361 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 362 if (bcmp(sup->escape, "%/@", 3) == 0) 363 joliet_level = 1; 364 if (bcmp(sup->escape, "%/C", 3) == 0) 365 joliet_level = 2; 366 if (bcmp(sup->escape, "%/E", 3) == 0) 367 joliet_level = 3; 368 369 if ((isonum_711 (sup->flags) & 1) && 370 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 371 joliet_level = 0; 372 } 373 } 374 break; 375 376 case ISO_VD_END: 377 goto vd_end; 378 379 default: 380 break; 381 } 382 if (bp) { 383 brelse(bp); 384 bp = NULL; 385 } 386 } 387 vd_end: 388 if (bp) { 389 brelse(bp); 390 bp = NULL; 391 } 392 393 if (pri == NULL) { 394 error = EINVAL; 395 goto out; 396 } 397 398 logical_block_size = 399 isonum_723 (high_sierra? 400 pri_sierra->logical_block_size: 401 pri->logical_block_size); 402 403 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 404 || (logical_block_size & (logical_block_size - 1)) != 0) { 405 error = EINVAL; 406 goto out; 407 } 408 409 rootp = (struct iso_directory_record *) 410 (high_sierra? 411 pri_sierra->root_directory_record: 412 pri->root_directory_record); 413 414 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 415 isomp->logical_block_size = logical_block_size; 416 isomp->volume_space_size = 417 isonum_733 (high_sierra? 418 pri_sierra->volume_space_size: 419 pri->volume_space_size); 420 isomp->joliet_level = 0; 421 /* 422 * Since an ISO9660 multi-session CD can also access previous 423 * sessions, we have to include them into the space consider- 424 * ations. This doesn't yield a very accurate number since 425 * parts of the old sessions might be inaccessible now, but we 426 * can't do much better. This is also important for the NFS 427 * filehandle validation. 428 */ 429 isomp->volume_space_size += argp->ssector; 430 bcopy (rootp, isomp->root, sizeof isomp->root); 431 isomp->root_extent = isonum_733 (rootp->extent); 432 isomp->root_size = isonum_733 (rootp->size); 433 434 isomp->im_bmask = logical_block_size - 1; 435 isomp->im_bshift = ffs(logical_block_size) - 1; 436 437 pribp->b_flags |= B_AGE; 438 brelse(pribp); 439 pribp = NULL; 440 441 mp->mnt_data = (qaddr_t)isomp; 442 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 443 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 444 mp->mnt_maxsymlinklen = 0; 445 mp->mnt_flag |= MNT_LOCAL; 446 isomp->im_mountp = mp; 447 isomp->im_dev = dev; 448 isomp->im_devvp = devvp; 449 450 dev->si_mountpoint = mp; 451 452 /* Check the Rock Ridge Extention support */ 453 if (!(argp->flags & ISOFSMNT_NORRIP)) { 454 if ((error = bread(isomp->im_devvp, 455 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 456 (isomp->im_bshift - DEV_BSHIFT), 457 isomp->logical_block_size, &bp)) != 0) 458 goto out; 459 460 rootp = (struct iso_directory_record *)bp->b_data; 461 462 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 463 argp->flags |= ISOFSMNT_NORRIP; 464 } else { 465 argp->flags &= ~ISOFSMNT_GENS; 466 } 467 468 /* 469 * The contents are valid, 470 * but they will get reread as part of another vnode, so... 471 */ 472 bp->b_flags |= B_AGE; 473 brelse(bp); 474 bp = NULL; 475 } 476 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 477 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 478 479 if (high_sierra) { 480 /* this effectively ignores all the mount flags */ 481 log(LOG_INFO, "cd9660: High Sierra Format\n"); 482 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 483 } else { 484 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 485 default: 486 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 487 break; 488 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 489 isomp->iso_ftype = ISO_FTYPE_9660; 490 break; 491 case 0: 492 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 493 isomp->iso_ftype = ISO_FTYPE_RRIP; 494 break; 495 } 496 } 497 498 /* Decide whether to use the Joliet descriptor */ 499 500 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 501 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 502 rootp = (struct iso_directory_record *) 503 sup->root_directory_record; 504 bcopy (rootp, isomp->root, sizeof isomp->root); 505 isomp->root_extent = isonum_733 (rootp->extent); 506 isomp->root_size = isonum_733 (rootp->size); 507 isomp->joliet_level = joliet_level; 508 supbp->b_flags |= B_AGE; 509 } 510 511 if (supbp) { 512 brelse(supbp); 513 supbp = NULL; 514 } 515 516 vfs_add_vnodeops(mp, &mp->mnt_vn_norm_ops, cd9660_vnodeop_entries); 517 vfs_add_vnodeops(mp, &mp->mnt_vn_spec_ops, cd9660_specop_entries); 518 vfs_add_vnodeops(mp, &mp->mnt_vn_fifo_ops, cd9660_fifoop_entries); 519 520 return 0; 521 out: 522 dev->si_mountpoint = NULL; 523 if (bp) 524 brelse(bp); 525 if (pribp) 526 brelse(pribp); 527 if (supbp) 528 brelse(supbp); 529 if (needclose) 530 (void)VOP_CLOSE(devvp, FREAD, td); 531 if (isomp) { 532 free((caddr_t)isomp, M_ISOFSMNT); 533 mp->mnt_data = (qaddr_t)0; 534 } 535 return error; 536 } 537 538 /* 539 * unmount system call 540 */ 541 static int 542 cd9660_unmount(struct mount *mp, int mntflags, struct thread *td) 543 { 544 struct iso_mnt *isomp; 545 int error, flags = 0; 546 547 if (mntflags & MNT_FORCE) 548 flags |= FORCECLOSE; 549 #if 0 550 mntflushbuf(mp, 0); 551 if (mntinvalbuf(mp)) 552 return EBUSY; 553 #endif 554 if ((error = vflush(mp, 0, flags))) 555 return (error); 556 557 isomp = VFSTOISOFS(mp); 558 559 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 560 error = VOP_CLOSE(isomp->im_devvp, FREAD, td); 561 vrele(isomp->im_devvp); 562 free((caddr_t)isomp, M_ISOFSMNT); 563 mp->mnt_data = (qaddr_t)0; 564 mp->mnt_flag &= ~MNT_LOCAL; 565 return (error); 566 } 567 568 /* 569 * Return root of a filesystem 570 */ 571 static int 572 cd9660_root(struct mount *mp, struct vnode **vpp) 573 { 574 struct iso_mnt *imp = VFSTOISOFS(mp); 575 struct iso_directory_record *dp = 576 (struct iso_directory_record *)imp->root; 577 ino_t ino = isodirino(dp, imp); 578 579 /* 580 * With RRIP we must use the `.' entry of the root directory. 581 * Simply tell vget, that it's a relocated directory. 582 */ 583 return (cd9660_vget_internal(mp, ino, vpp, 584 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 585 } 586 587 /* 588 * Get file system statistics. 589 */ 590 int 591 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 592 { 593 struct iso_mnt *isomp; 594 595 isomp = VFSTOISOFS(mp); 596 597 sbp->f_bsize = isomp->logical_block_size; 598 sbp->f_iosize = sbp->f_bsize; /* XXX */ 599 sbp->f_blocks = isomp->volume_space_size; 600 sbp->f_bfree = 0; /* total free blocks */ 601 sbp->f_bavail = 0; /* blocks free for non superuser */ 602 sbp->f_files = 0; /* total files */ 603 sbp->f_ffree = 0; /* free file nodes */ 604 if (sbp != &mp->mnt_stat) { 605 sbp->f_type = mp->mnt_vfc->vfc_typenum; 606 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 607 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 608 } 609 return 0; 610 } 611 612 /* 613 * File handle to vnode 614 * 615 * Have to be really careful about stale file handles: 616 * - check that the inode number is in range 617 * - call iget() to get the locked inode 618 * - check for an unallocated inode (i_mode == 0) 619 * - check that the generation number matches 620 */ 621 622 struct ifid { 623 ushort ifid_len; 624 ushort ifid_pad; 625 int ifid_ino; 626 long ifid_start; 627 }; 628 629 /* ARGSUSED */ 630 int 631 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 632 { 633 struct ifid *ifhp = (struct ifid *)fhp; 634 struct iso_node *ip; 635 struct vnode *nvp; 636 int error; 637 638 #ifdef ISOFS_DBG 639 printf("fhtovp: ino %d, start %ld\n", 640 ifhp->ifid_ino, ifhp->ifid_start); 641 #endif 642 643 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 644 *vpp = NULLVP; 645 return (error); 646 } 647 ip = VTOI(nvp); 648 if (ip->inode.iso_mode == 0) { 649 vput(nvp); 650 *vpp = NULLVP; 651 return (ESTALE); 652 } 653 *vpp = nvp; 654 return (0); 655 } 656 657 int 658 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp, 659 struct ucred **credanonp) 660 { 661 struct netcred *np; 662 struct iso_mnt *imp; 663 664 imp = VFSTOISOFS(mp); 665 666 /* 667 * Get the export permission structure for this <mp, client> tuple. 668 */ 669 np = vfs_export_lookup(mp, &imp->im_export, nam); 670 if (np == NULL) 671 return (EACCES); 672 673 *exflagsp = np->netc_exflags; 674 *credanonp = &np->netc_anon; 675 return (0); 676 } 677 678 int 679 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 680 { 681 682 /* 683 * XXXX 684 * It would be nice if we didn't always set the `relocated' flag 685 * and force the extra read, but I don't want to think about fixing 686 * that right now. 687 */ 688 return (cd9660_vget_internal(mp, ino, vpp, 689 #if 0 690 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 691 #else 692 0, 693 #endif 694 (struct iso_directory_record *)0)); 695 } 696 697 int 698 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 699 int relocated, struct iso_directory_record *isodir) 700 { 701 /*struct thread *td = curthread;*/ 702 struct iso_mnt *imp; 703 struct iso_node *ip; 704 struct buf *bp; 705 struct vnode *vp; 706 dev_t dev; 707 int error; 708 709 imp = VFSTOISOFS(mp); 710 dev = imp->im_dev; 711 again: 712 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 713 return (0); 714 715 /* Allocate a new vnode/iso_node. */ 716 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0); 717 if (error) { 718 *vpp = NULLVP; 719 return (error); 720 } 721 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 722 M_WAITOK); 723 bzero((caddr_t)ip, sizeof(struct iso_node)); 724 ip->i_vnode = vp; 725 ip->i_dev = dev; 726 ip->i_number = ino; 727 728 /* 729 * Insert it into the inode hash table and check for a collision. 730 * If a collision occurs, throw away the vnode and try again. 731 */ 732 if (cd9660_ihashins(ip) != 0) { 733 printf("debug: cd9660 ihashins collision, retrying\n"); 734 vx_put(vp); 735 free(ip, M_ISOFSNODE); 736 goto again; 737 } 738 vp->v_data = ip; 739 740 if (isodir == 0) { 741 int lbn, off; 742 743 lbn = lblkno(imp, ino); 744 if (lbn >= imp->volume_space_size) { 745 vx_put(vp); 746 printf("fhtovp: lbn exceed volume space %d\n", lbn); 747 return (ESTALE); 748 } 749 750 off = blkoff(imp, ino); 751 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 752 vx_put(vp); 753 printf("fhtovp: crosses block boundary %d\n", 754 off + ISO_DIRECTORY_RECORD_SIZE); 755 return (ESTALE); 756 } 757 758 error = bread(imp->im_devvp, 759 lbn << (imp->im_bshift - DEV_BSHIFT), 760 imp->logical_block_size, &bp); 761 if (error) { 762 vx_put(vp); 763 brelse(bp); 764 printf("fhtovp: bread error %d\n",error); 765 return (error); 766 } 767 isodir = (struct iso_directory_record *)(bp->b_data + off); 768 769 if (off + isonum_711(isodir->length) > 770 imp->logical_block_size) { 771 vx_put(vp); 772 if (bp != 0) 773 brelse(bp); 774 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 775 off +isonum_711(isodir->length), off, 776 isonum_711(isodir->length)); 777 return (ESTALE); 778 } 779 780 #if 0 781 if (isonum_733(isodir->extent) + 782 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 783 if (bp != 0) 784 brelse(bp); 785 printf("fhtovp: file start miss %d vs %d\n", 786 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 787 ifhp->ifid_start); 788 return (ESTALE); 789 } 790 #endif 791 } else 792 bp = 0; 793 794 ip->i_mnt = imp; 795 ip->i_devvp = imp->im_devvp; 796 vref(ip->i_devvp); 797 798 if (relocated) { 799 /* 800 * On relocated directories we must 801 * read the `.' entry out of a dir. 802 */ 803 ip->iso_start = ino >> imp->im_bshift; 804 if (bp != 0) 805 brelse(bp); 806 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 807 vx_put(vp); 808 return (error); 809 } 810 isodir = (struct iso_directory_record *)bp->b_data; 811 } 812 813 ip->iso_extent = isonum_733(isodir->extent); 814 ip->i_size = isonum_733(isodir->size); 815 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 816 817 /* 818 * Setup time stamp, attribute 819 */ 820 vp->v_type = VNON; 821 switch (imp->iso_ftype) { 822 default: /* ISO_FTYPE_9660 */ 823 { 824 struct buf *bp2; 825 int off; 826 if ((imp->im_flags & ISOFSMNT_EXTATT) 827 && (off = isonum_711(isodir->ext_attr_length))) 828 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 829 &bp2); 830 else 831 bp2 = NULL; 832 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 833 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 834 if (bp2) 835 brelse(bp2); 836 break; 837 } 838 case ISO_FTYPE_RRIP: 839 cd9660_rrip_analyze(isodir, ip, imp); 840 break; 841 } 842 843 if (bp != 0) 844 brelse(bp); 845 846 /* 847 * Initialize the associated vnode 848 */ 849 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 850 case VFIFO: 851 vp->v_ops = &mp->mnt_vn_fifo_ops; 852 break; 853 case VCHR: 854 case VBLK: 855 vp->v_ops = &mp->mnt_vn_spec_ops; 856 addaliasu(vp, ip->inode.iso_rdev); 857 break; 858 default: 859 break; 860 } 861 862 if (ip->iso_extent == imp->root_extent) 863 vp->v_flag |= VROOT; 864 865 /* 866 * Return the locked and refd vp 867 */ 868 *vpp = vp; 869 return (0); 870 } 871 872 /* 873 * Vnode pointer to File handle 874 */ 875 /* ARGSUSED */ 876 int 877 cd9660_vptofh(struct vnode *vp, struct fid *fhp) 878 { 879 struct iso_node *ip = VTOI(vp); 880 struct ifid *ifhp; 881 882 ifhp = (struct ifid *)fhp; 883 ifhp->ifid_len = sizeof(struct ifid); 884 885 ifhp->ifid_ino = ip->i_number; 886 ifhp->ifid_start = ip->iso_start; 887 888 #ifdef ISOFS_DBG 889 printf("vptofh: ino %d, start %ld\n", 890 ifhp->ifid_ino,ifhp->ifid_start); 891 #endif 892 return 0; 893 } 894