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 1.20 2004/08/28 19:02:15 dillon Exp $ 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/proc.h> 46 #include <sys/namei.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 *, 73 char *, caddr_t, struct nameidata *, struct thread *); 74 static int cd9660_unmount (struct mount *, int, struct thread *); 75 static int cd9660_root (struct mount *, struct vnode **); 76 static int cd9660_statfs (struct mount *, struct statfs *, struct thread *); 77 static int cd9660_vget (struct mount *, ino_t, struct vnode **); 78 static int cd9660_fhtovp (struct mount *, 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 cd9660_mount, 85 vfs_stdstart, 86 cd9660_unmount, 87 cd9660_root, 88 vfs_stdquotactl, 89 cd9660_statfs, 90 vfs_stdsync, 91 cd9660_vget, 92 cd9660_fhtovp, 93 cd9660_checkexp, 94 cd9660_vptofh, 95 cd9660_init, 96 cd9660_uninit, 97 vfs_stdextattrctl, 98 }; 99 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 100 MODULE_VERSION(cd9660, 1); 101 102 103 /* 104 * Called by vfs_mountroot when iso is going to be mounted as root. 105 */ 106 107 static int iso_get_ssector (dev_t dev, struct thread *td); 108 static int iso_mountfs (struct vnode *devvp, struct mount *mp, 109 struct thread *td, struct iso_args *argp); 110 111 /* 112 * Try to find the start of the last data track on this CD-ROM. This 113 * is used to mount the last session of a multi-session CD. Bail out 114 * and return 0 if we fail, this is always a safe bet. 115 */ 116 static int 117 iso_get_ssector(dev_t dev, struct thread *td) 118 { 119 struct ioc_toc_header h; 120 struct ioc_read_toc_single_entry t; 121 int i; 122 123 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0) 124 return 0; 125 126 for (i = h.ending_track; i >= 0; i--) { 127 t.address_format = CD_LBA_FORMAT; 128 t.track = i; 129 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) { 130 return 0; 131 } 132 if ((t.entry.control & 4) != 0) 133 /* found a data track */ 134 break; 135 } 136 137 if (i < 0) 138 return 0; 139 140 return ntohl(t.entry.addr.lba); 141 } 142 143 static int iso_mountroot (struct mount *mp, struct thread *td); 144 145 static int 146 iso_mountroot(struct mount *mp, struct thread *td) 147 { 148 struct iso_args args; 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, NULL, LK_EXCLUSIVE | LK_RETRY, td); 158 error = VOP_OPEN(rootvp, FREAD, FSCRED, td); 159 VOP_UNLOCK(rootvp, NULL, 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 nameidata *ndp, 184 struct thread *td) 185 { 186 struct vnode *devvp; 187 struct iso_args args; 188 size_t size; 189 int error; 190 mode_t accessmode; 191 struct iso_mnt *imp = 0; 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 NDINIT(ndp, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, args.fspec, td); 218 if ((error = namei(ndp))) 219 return (error); 220 NDFREE(ndp, NDF_ONLY_PNBUF); 221 devvp = ndp->ni_vp; 222 223 if (!vn_isdisk(devvp, &error)) { 224 vrele(devvp); 225 return (error); 226 } 227 228 /* 229 * Verify that user has necessary permissions on the device, 230 * or has superuser abilities 231 */ 232 accessmode = VREAD; 233 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 234 error = VOP_ACCESS(devvp, accessmode, td->td_proc->p_ucred, td); 235 if (error) 236 error = suser(td); 237 if (error) { 238 vput(devvp); 239 return (error); 240 } 241 VOP_UNLOCK(devvp, NULL, 0, td); 242 243 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 244 error = iso_mountfs(devvp, mp, td, &args); 245 } else { 246 if (devvp != imp->im_devvp) 247 error = EINVAL; /* needs translation */ 248 else 249 vrele(devvp); 250 } 251 if (error) { 252 vrele(devvp); 253 return error; 254 } 255 imp = VFSTOISOFS(mp); 256 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 257 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 258 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 259 &size); 260 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 261 (void) cd9660_statfs(mp, &mp->mnt_stat, td); 262 return 0; 263 } 264 265 /* 266 * Common code for mount and mountroot 267 */ 268 static int 269 iso_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td, 270 struct iso_args *argp) 271 { 272 struct iso_mnt *isomp = NULL; 273 struct buf *bp = NULL; 274 struct buf *pribp = NULL, *supbp = NULL; 275 dev_t dev; 276 int error = EINVAL; 277 int needclose = 0; 278 int high_sierra = 0; 279 int iso_bsize; 280 int iso_blknum; 281 int joliet_level; 282 struct iso_volume_descriptor *vdp = 0; 283 struct iso_primary_descriptor *pri = NULL; 284 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 285 struct iso_supplementary_descriptor *sup = NULL; 286 struct iso_directory_record *rootp; 287 int logical_block_size; 288 289 if (!(mp->mnt_flag & MNT_RDONLY)) 290 return EROFS; 291 292 /* 293 * Disallow multiple mounts of the same device. 294 * Disallow mounting of a device that is currently in use 295 * (except for root, which might share swap device for miniroot). 296 * Flush out any old buffers remaining from a previous use. 297 */ 298 if ((error = vfs_mountedon(devvp))) 299 return error; 300 if (count_udev(devvp->v_udev) > 0 && devvp != rootvp) 301 return EBUSY; 302 if ((error = vinvalbuf(devvp, V_SAVE, td, 0, 0))) 303 return (error); 304 305 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 306 error = VOP_OPEN(devvp, FREAD, FSCRED, td); 307 VOP_UNLOCK(devvp, NULL, 0, td); 308 if (error) 309 return error; 310 dev = devvp->v_rdev; 311 if (dev->si_iosize_max != 0) 312 mp->mnt_iosize_max = dev->si_iosize_max; 313 if (mp->mnt_iosize_max > MAXPHYS) 314 mp->mnt_iosize_max = MAXPHYS; 315 316 needclose = 1; 317 318 /* This is the "logical sector size". The standard says this 319 * should be 2048 or the physical sector size on the device, 320 * whichever is greater. For now, we'll just use a constant. 321 */ 322 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 323 324 joliet_level = 0; 325 for (iso_blknum = 16 + argp->ssector; 326 iso_blknum < 100 + argp->ssector; 327 iso_blknum++) { 328 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 329 iso_bsize, &bp)) != 0) 330 goto out; 331 332 vdp = (struct iso_volume_descriptor *)bp->b_data; 333 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 334 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 335 sizeof vdp->id) != 0) { 336 error = EINVAL; 337 goto out; 338 } else 339 high_sierra = 1; 340 } 341 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 342 case ISO_VD_PRIMARY: 343 if (pribp == NULL) { 344 pribp = bp; 345 bp = NULL; 346 pri = (struct iso_primary_descriptor *)vdp; 347 pri_sierra = 348 (struct iso_sierra_primary_descriptor *)vdp; 349 } 350 break; 351 352 case ISO_VD_SUPPLEMENTARY: 353 if (supbp == NULL) { 354 supbp = bp; 355 bp = NULL; 356 sup = (struct iso_supplementary_descriptor *)vdp; 357 358 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 359 if (bcmp(sup->escape, "%/@", 3) == 0) 360 joliet_level = 1; 361 if (bcmp(sup->escape, "%/C", 3) == 0) 362 joliet_level = 2; 363 if (bcmp(sup->escape, "%/E", 3) == 0) 364 joliet_level = 3; 365 366 if ((isonum_711 (sup->flags) & 1) && 367 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 368 joliet_level = 0; 369 } 370 } 371 break; 372 373 case ISO_VD_END: 374 goto vd_end; 375 376 default: 377 break; 378 } 379 if (bp) { 380 brelse(bp); 381 bp = NULL; 382 } 383 } 384 vd_end: 385 if (bp) { 386 brelse(bp); 387 bp = NULL; 388 } 389 390 if (pri == NULL) { 391 error = EINVAL; 392 goto out; 393 } 394 395 logical_block_size = 396 isonum_723 (high_sierra? 397 pri_sierra->logical_block_size: 398 pri->logical_block_size); 399 400 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 401 || (logical_block_size & (logical_block_size - 1)) != 0) { 402 error = EINVAL; 403 goto out; 404 } 405 406 rootp = (struct iso_directory_record *) 407 (high_sierra? 408 pri_sierra->root_directory_record: 409 pri->root_directory_record); 410 411 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 412 isomp->logical_block_size = logical_block_size; 413 isomp->volume_space_size = 414 isonum_733 (high_sierra? 415 pri_sierra->volume_space_size: 416 pri->volume_space_size); 417 isomp->joliet_level = 0; 418 /* 419 * Since an ISO9660 multi-session CD can also access previous 420 * sessions, we have to include them into the space consider- 421 * ations. This doesn't yield a very accurate number since 422 * parts of the old sessions might be inaccessible now, but we 423 * can't do much better. This is also important for the NFS 424 * filehandle validation. 425 */ 426 isomp->volume_space_size += argp->ssector; 427 bcopy (rootp, isomp->root, sizeof isomp->root); 428 isomp->root_extent = isonum_733 (rootp->extent); 429 isomp->root_size = isonum_733 (rootp->size); 430 431 isomp->im_bmask = logical_block_size - 1; 432 isomp->im_bshift = ffs(logical_block_size) - 1; 433 434 pribp->b_flags |= B_AGE; 435 brelse(pribp); 436 pribp = NULL; 437 438 mp->mnt_data = (qaddr_t)isomp; 439 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 440 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 441 mp->mnt_maxsymlinklen = 0; 442 mp->mnt_flag |= MNT_LOCAL; 443 isomp->im_mountp = mp; 444 isomp->im_dev = dev; 445 isomp->im_devvp = devvp; 446 447 dev->si_mountpoint = mp; 448 449 /* Check the Rock Ridge Extention support */ 450 if (!(argp->flags & ISOFSMNT_NORRIP)) { 451 if ((error = bread(isomp->im_devvp, 452 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 453 (isomp->im_bshift - DEV_BSHIFT), 454 isomp->logical_block_size, &bp)) != 0) 455 goto out; 456 457 rootp = (struct iso_directory_record *)bp->b_data; 458 459 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 460 argp->flags |= ISOFSMNT_NORRIP; 461 } else { 462 argp->flags &= ~ISOFSMNT_GENS; 463 } 464 465 /* 466 * The contents are valid, 467 * but they will get reread as part of another vnode, so... 468 */ 469 bp->b_flags |= B_AGE; 470 brelse(bp); 471 bp = NULL; 472 } 473 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 474 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET); 475 476 if (high_sierra) { 477 /* this effectively ignores all the mount flags */ 478 log(LOG_INFO, "cd9660: High Sierra Format\n"); 479 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 480 } else { 481 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 482 default: 483 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 484 break; 485 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 486 isomp->iso_ftype = ISO_FTYPE_9660; 487 break; 488 case 0: 489 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 490 isomp->iso_ftype = ISO_FTYPE_RRIP; 491 break; 492 } 493 } 494 495 /* Decide whether to use the Joliet descriptor */ 496 497 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 498 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 499 rootp = (struct iso_directory_record *) 500 sup->root_directory_record; 501 bcopy (rootp, isomp->root, sizeof isomp->root); 502 isomp->root_extent = isonum_733 (rootp->extent); 503 isomp->root_size = isonum_733 (rootp->size); 504 isomp->joliet_level = joliet_level; 505 supbp->b_flags |= B_AGE; 506 } 507 508 if (supbp) { 509 brelse(supbp); 510 supbp = NULL; 511 } 512 513 vfs_add_vnodeops(&mp->mnt_vn_ops, cd9660_vnodeop_entries); 514 vfs_add_vnodeops(&mp->mnt_vn_spec_ops, cd9660_specop_entries); 515 vfs_add_vnodeops(&mp->mnt_vn_fifo_ops, cd9660_fifoop_entries); 516 517 return 0; 518 out: 519 dev->si_mountpoint = NULL; 520 if (bp) 521 brelse(bp); 522 if (pribp) 523 brelse(pribp); 524 if (supbp) 525 brelse(supbp); 526 if (needclose) 527 (void)VOP_CLOSE(devvp, FREAD, td); 528 if (isomp) { 529 free((caddr_t)isomp, M_ISOFSMNT); 530 mp->mnt_data = (qaddr_t)0; 531 } 532 return error; 533 } 534 535 /* 536 * unmount system call 537 */ 538 static int 539 cd9660_unmount(struct mount *mp, int mntflags, struct thread *td) 540 { 541 struct iso_mnt *isomp; 542 int error, flags = 0; 543 544 if (mntflags & MNT_FORCE) 545 flags |= FORCECLOSE; 546 #if 0 547 mntflushbuf(mp, 0); 548 if (mntinvalbuf(mp)) 549 return EBUSY; 550 #endif 551 if ((error = vflush(mp, 0, flags))) 552 return (error); 553 554 isomp = VFSTOISOFS(mp); 555 556 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 557 error = VOP_CLOSE(isomp->im_devvp, FREAD, td); 558 vrele(isomp->im_devvp); 559 free((caddr_t)isomp, M_ISOFSMNT); 560 mp->mnt_data = (qaddr_t)0; 561 mp->mnt_flag &= ~MNT_LOCAL; 562 return (error); 563 } 564 565 /* 566 * Return root of a filesystem 567 */ 568 static int 569 cd9660_root(struct mount *mp, struct vnode **vpp) 570 { 571 struct iso_mnt *imp = VFSTOISOFS(mp); 572 struct iso_directory_record *dp = 573 (struct iso_directory_record *)imp->root; 574 ino_t ino = isodirino(dp, imp); 575 576 /* 577 * With RRIP we must use the `.' entry of the root directory. 578 * Simply tell vget, that it's a relocated directory. 579 */ 580 return (cd9660_vget_internal(mp, ino, vpp, 581 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 582 } 583 584 /* 585 * Get file system statistics. 586 */ 587 int 588 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 589 { 590 struct iso_mnt *isomp; 591 592 isomp = VFSTOISOFS(mp); 593 594 sbp->f_bsize = isomp->logical_block_size; 595 sbp->f_iosize = sbp->f_bsize; /* XXX */ 596 sbp->f_blocks = isomp->volume_space_size; 597 sbp->f_bfree = 0; /* total free blocks */ 598 sbp->f_bavail = 0; /* blocks free for non superuser */ 599 sbp->f_files = 0; /* total files */ 600 sbp->f_ffree = 0; /* free file nodes */ 601 if (sbp != &mp->mnt_stat) { 602 sbp->f_type = mp->mnt_vfc->vfc_typenum; 603 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 604 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 605 } 606 return 0; 607 } 608 609 /* 610 * File handle to vnode 611 * 612 * Have to be really careful about stale file handles: 613 * - check that the inode number is in range 614 * - call iget() to get the locked inode 615 * - check for an unallocated inode (i_mode == 0) 616 * - check that the generation number matches 617 */ 618 619 struct ifid { 620 ushort ifid_len; 621 ushort ifid_pad; 622 int ifid_ino; 623 long ifid_start; 624 }; 625 626 /* ARGSUSED */ 627 int 628 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 629 { 630 struct ifid *ifhp = (struct ifid *)fhp; 631 struct iso_node *ip; 632 struct vnode *nvp; 633 int error; 634 635 #ifdef ISOFS_DBG 636 printf("fhtovp: ino %d, start %ld\n", 637 ifhp->ifid_ino, ifhp->ifid_start); 638 #endif 639 640 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 641 *vpp = NULLVP; 642 return (error); 643 } 644 ip = VTOI(nvp); 645 if (ip->inode.iso_mode == 0) { 646 vput(nvp); 647 *vpp = NULLVP; 648 return (ESTALE); 649 } 650 *vpp = nvp; 651 return (0); 652 } 653 654 int 655 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp, 656 struct ucred **credanonp) 657 { 658 struct netcred *np; 659 struct iso_mnt *imp; 660 661 imp = VFSTOISOFS(mp); 662 663 /* 664 * Get the export permission structure for this <mp, client> tuple. 665 */ 666 np = vfs_export_lookup(mp, &imp->im_export, nam); 667 if (np == NULL) 668 return (EACCES); 669 670 *exflagsp = np->netc_exflags; 671 *credanonp = &np->netc_anon; 672 return (0); 673 } 674 675 int 676 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 677 { 678 679 /* 680 * XXXX 681 * It would be nice if we didn't always set the `relocated' flag 682 * and force the extra read, but I don't want to think about fixing 683 * that right now. 684 */ 685 return (cd9660_vget_internal(mp, ino, vpp, 686 #if 0 687 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 688 #else 689 0, 690 #endif 691 (struct iso_directory_record *)0)); 692 } 693 694 int 695 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 696 int relocated, struct iso_directory_record *isodir) 697 { 698 struct thread *td = curthread; 699 struct iso_mnt *imp; 700 struct iso_node *ip; 701 struct buf *bp; 702 struct vnode *vp; 703 dev_t dev; 704 int error; 705 706 imp = VFSTOISOFS(mp); 707 dev = imp->im_dev; 708 again: 709 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 710 return (0); 711 712 /* Allocate a new vnode/iso_node. */ 713 error = getnewvnode(VT_ISOFS, mp, mp->mnt_vn_ops, &vp, 0, 0); 714 if (error) { 715 *vpp = NULLVP; 716 return (error); 717 } 718 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 719 M_WAITOK); 720 bzero((caddr_t)ip, sizeof(struct iso_node)); 721 lockmgr(&vp->v_lock, LK_EXCLUSIVE, NULL, td); 722 ip->i_vnode = vp; 723 ip->i_dev = dev; 724 ip->i_number = ino; 725 726 /* 727 * Insert it into the inode hash table and check for a collision. 728 * If a collision occurs, throw away the vnode and try again. 729 */ 730 if (cd9660_ihashins(ip) != 0) { 731 printf("debug: cd9660 ihashins collision, retrying\n"); 732 vput(vp); 733 free(ip, M_ISOFSNODE); 734 goto again; 735 } 736 vp->v_data = ip; 737 738 if (isodir == 0) { 739 int lbn, off; 740 741 lbn = lblkno(imp, ino); 742 if (lbn >= imp->volume_space_size) { 743 vput(vp); 744 printf("fhtovp: lbn exceed volume space %d\n", lbn); 745 return (ESTALE); 746 } 747 748 off = blkoff(imp, ino); 749 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 750 vput(vp); 751 printf("fhtovp: crosses block boundary %d\n", 752 off + ISO_DIRECTORY_RECORD_SIZE); 753 return (ESTALE); 754 } 755 756 error = bread(imp->im_devvp, 757 lbn << (imp->im_bshift - DEV_BSHIFT), 758 imp->logical_block_size, &bp); 759 if (error) { 760 vput(vp); 761 brelse(bp); 762 printf("fhtovp: bread error %d\n",error); 763 return (error); 764 } 765 isodir = (struct iso_directory_record *)(bp->b_data + off); 766 767 if (off + isonum_711(isodir->length) > 768 imp->logical_block_size) { 769 vput(vp); 770 if (bp != 0) 771 brelse(bp); 772 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 773 off +isonum_711(isodir->length), off, 774 isonum_711(isodir->length)); 775 return (ESTALE); 776 } 777 778 #if 0 779 if (isonum_733(isodir->extent) + 780 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 781 if (bp != 0) 782 brelse(bp); 783 printf("fhtovp: file start miss %d vs %d\n", 784 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 785 ifhp->ifid_start); 786 return (ESTALE); 787 } 788 #endif 789 } else 790 bp = 0; 791 792 ip->i_mnt = imp; 793 ip->i_devvp = imp->im_devvp; 794 vref(ip->i_devvp); 795 796 if (relocated) { 797 /* 798 * On relocated directories we must 799 * read the `.' entry out of a dir. 800 */ 801 ip->iso_start = ino >> imp->im_bshift; 802 if (bp != 0) 803 brelse(bp); 804 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 805 vput(vp); 806 return (error); 807 } 808 isodir = (struct iso_directory_record *)bp->b_data; 809 } 810 811 ip->iso_extent = isonum_733(isodir->extent); 812 ip->i_size = isonum_733(isodir->size); 813 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 814 815 /* 816 * Setup time stamp, attribute 817 */ 818 vp->v_type = VNON; 819 switch (imp->iso_ftype) { 820 default: /* ISO_FTYPE_9660 */ 821 { 822 struct buf *bp2; 823 int off; 824 if ((imp->im_flags & ISOFSMNT_EXTATT) 825 && (off = isonum_711(isodir->ext_attr_length))) 826 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 827 &bp2); 828 else 829 bp2 = NULL; 830 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 831 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 832 if (bp2) 833 brelse(bp2); 834 break; 835 } 836 case ISO_FTYPE_RRIP: 837 cd9660_rrip_analyze(isodir, ip, imp); 838 break; 839 } 840 841 if (bp != 0) 842 brelse(bp); 843 844 /* 845 * Initialize the associated vnode 846 */ 847 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 848 case VFIFO: 849 vp->v_ops = mp->mnt_vn_fifo_ops; 850 break; 851 case VCHR: 852 case VBLK: 853 vp->v_ops = mp->mnt_vn_spec_ops; 854 addaliasu(vp, ip->inode.iso_rdev); 855 break; 856 default: 857 break; 858 } 859 860 if (ip->iso_extent == imp->root_extent) 861 vp->v_flag |= VROOT; 862 863 /* 864 * XXX need generation number? 865 */ 866 867 *vpp = vp; 868 return (0); 869 } 870 871 /* 872 * Vnode pointer to File handle 873 */ 874 /* ARGSUSED */ 875 int 876 cd9660_vptofh(struct vnode *vp, struct fid *fhp) 877 { 878 struct iso_node *ip = VTOI(vp); 879 struct ifid *ifhp; 880 881 ifhp = (struct ifid *)fhp; 882 ifhp->ifid_len = sizeof(struct ifid); 883 884 ifhp->ifid_ino = ip->i_number; 885 ifhp->ifid_start = ip->iso_start; 886 887 #ifdef ISOFS_DBG 888 printf("vptofh: ino %d, start %ld\n", 889 ifhp->ifid_ino,ifhp->ifid_start); 890 #endif 891 return 0; 892 } 893