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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 35 * $FreeBSD: src/sys/isofs/cd9660/cd9660_vfsops.c,v 1.74.2.7 2002/04/08 09:39:29 bde Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/proc.h> 41 #include <sys/priv.h> 42 #include <sys/nlookup.h> 43 #include <sys/kernel.h> 44 #include <sys/vnode.h> 45 #include <sys/mount.h> 46 #include <sys/buf.h> 47 #include <sys/cdio.h> 48 #include <sys/conf.h> 49 #include <sys/fcntl.h> 50 #include <sys/malloc.h> 51 #include <sys/stat.h> 52 #include <sys/syslog.h> 53 #include <sys/iconv.h> 54 55 #include <vm/vm_zone.h> 56 57 #include <sys/buf2.h> 58 59 #include "iso.h" 60 #include "iso_rrip.h" 61 #include "cd9660_node.h" 62 #include "cd9660_mount.h" 63 64 extern struct vop_ops cd9660_vnode_vops; 65 extern struct vop_ops cd9660_spec_vops; 66 extern struct vop_ops cd9660_fifo_vops; 67 68 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 69 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part"); 70 71 struct iconv_functions *cd9660_iconv = NULL; 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 *, struct vnode *, 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_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, 121 proc0.p_ucred, NULL, NULL) != 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, 128 proc0.p_ucred, NULL, NULL) != 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 143 iso_mountroot(struct mount *mp) 144 { 145 struct iso_args args; 146 struct vnode *rootvp; 147 int error; 148 149 if ((error = bdevvp(rootdev, &rootvp))) { 150 kprintf("iso_mountroot: can't find rootvp\n"); 151 return (error); 152 } 153 args.flags = ISOFSMNT_ROOT; 154 155 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY); 156 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL); 157 vn_unlock(rootvp); 158 if (error) 159 return (error); 160 161 args.ssector = iso_get_ssector(rootdev); 162 163 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY); 164 VOP_CLOSE(rootvp, FREAD, NULL); 165 vn_unlock(rootvp); 166 167 if (bootverbose) 168 kprintf("iso_mountroot(): using session at block %d\n", 169 args.ssector); 170 if ((error = iso_mountfs(rootvp, mp, &args)) != 0) 171 return (error); 172 173 cd9660_statfs(mp, &mp->mnt_stat, proc0.p_ucred); 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 ucred *cred) 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 = NULL; 191 struct nlookupdata nd; 192 193 if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) { 194 return (iso_mountroot(mp)); 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 /* 203 * If updating, check whether changing from read-only to 204 * read/write; if there is no device name, that's all we do. 205 */ 206 if (mp->mnt_flag & MNT_UPDATE) { 207 imp = VFSTOISOFS(mp); 208 if (args.fspec == NULL) 209 return (vfs_export(mp, &imp->im_export, &args.export)); 210 } 211 /* 212 * Not an update, or updating the name: look up the name 213 * and verify that it refers to a sensible block device. 214 */ 215 devvp = NULL; 216 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW); 217 if (error == 0) 218 error = nlookup(&nd); 219 if (error == 0) 220 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp); 221 nlookup_done(&nd); 222 if (error) 223 return (error); 224 225 if (!vn_isdisk(devvp, &error)) { 226 vrele(devvp); 227 return (error); 228 } 229 230 /* 231 * Verify that user has necessary permissions on the device, 232 * or has superuser abilities 233 */ 234 accessmode = VREAD; 235 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 236 error = VOP_EACCESS(devvp, accessmode, cred); 237 if (error) 238 error = priv_check_cred(cred, PRIV_ROOT, 0); 239 if (error) { 240 vput(devvp); 241 return (error); 242 } 243 vn_unlock(devvp); 244 245 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 246 error = iso_mountfs(devvp, mp, &args); 247 } else { 248 if (devvp != imp->im_devvp) 249 error = EINVAL; /* needs translation */ 250 else 251 vrele(devvp); 252 } 253 if (error) { 254 vrele(devvp); 255 return error; 256 } 257 imp = VFSTOISOFS(mp); 258 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 259 &size); 260 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 261 cd9660_statfs(mp, &mp->mnt_stat, cred); 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 iso_args *argp) 270 { 271 struct iso_mnt *isomp = NULL; 272 struct buf *bp = NULL; 273 struct buf *pribp = NULL, *supbp = NULL; 274 cdev_t dev; 275 int error = EINVAL; 276 int needclose = 0; 277 int high_sierra = 0; 278 int iso_bsize; 279 int iso_blknum; 280 int joliet_level; 281 struct iso_volume_descriptor *vdp = NULL; 282 struct iso_primary_descriptor *pri = NULL; 283 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 284 struct iso_supplementary_descriptor *sup = NULL; 285 struct iso_directory_record *rootp; 286 int logical_block_size; 287 char cs_local[ICONV_CSNMAXLEN]; 288 char cs_disk[ICONV_CSNMAXLEN]; 289 290 if (!(mp->mnt_flag & MNT_RDONLY)) 291 return EROFS; 292 293 /* 294 * Disallow multiple mounts of the same device. 295 * Disallow mounting of a device that is currently in use 296 * Flush out any old buffers remaining from a previous use. 297 */ 298 if ((error = vfs_mountedon(devvp))) 299 return error; 300 if (vcount(devvp) > 0) 301 return EBUSY; 302 if ((error = vinvalbuf(devvp, V_SAVE, 0, 0))) 303 return (error); 304 305 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 306 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL); 307 vn_unlock(devvp); 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, (off_t)iso_blknum * 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 = kmalloc(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 Extension support */ 450 if (!(argp->flags & ISOFSMNT_NORRIP)) { 451 if ((error = bread(isomp->im_devvp, 452 lblktooff(isomp, isomp->root_extent + isonum_711(rootp->ext_attr_length)), 453 isomp->logical_block_size, &bp)) != 0) 454 goto out; 455 456 rootp = (struct iso_directory_record *)bp->b_data; 457 458 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 459 argp->flags |= ISOFSMNT_NORRIP; 460 } else { 461 argp->flags &= ~ISOFSMNT_GENS; 462 } 463 464 /* 465 * The contents are valid, 466 * but they will get reread as part of another vnode, so... 467 */ 468 bp->b_flags |= B_AGE; 469 brelse(bp); 470 bp = NULL; 471 } 472 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 473 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | 474 ISOFSMNT_KICONV); 475 476 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 477 bcopy(argp->cs_local, cs_local, sizeof(cs_local)); 478 bcopy(argp->cs_disk, cs_disk, sizeof(cs_disk)); 479 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l); 480 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d); 481 } else { 482 isomp->im_d2l = NULL; 483 isomp->im_l2d = NULL; 484 } 485 486 if (high_sierra) { 487 /* this effectively ignores all the mount flags */ 488 log(LOG_INFO, "cd9660: High Sierra Format\n"); 489 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 490 } else { 491 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 492 default: 493 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 494 break; 495 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 496 isomp->iso_ftype = ISO_FTYPE_9660; 497 break; 498 case 0: 499 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 500 isomp->iso_ftype = ISO_FTYPE_RRIP; 501 break; 502 } 503 } 504 505 /* Decide whether to use the Joliet descriptor */ 506 507 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 508 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 509 rootp = (struct iso_directory_record *) 510 sup->root_directory_record; 511 bcopy (rootp, isomp->root, sizeof isomp->root); 512 isomp->root_extent = isonum_733 (rootp->extent); 513 isomp->root_size = isonum_733 (rootp->size); 514 isomp->joliet_level = joliet_level; 515 supbp->b_flags |= B_AGE; 516 } 517 518 if (supbp) { 519 brelse(supbp); 520 supbp = NULL; 521 } 522 523 vfs_add_vnodeops(mp, &cd9660_vnode_vops, &mp->mnt_vn_norm_ops); 524 vfs_add_vnodeops(mp, &cd9660_spec_vops, &mp->mnt_vn_spec_ops); 525 vfs_add_vnodeops(mp, &cd9660_fifo_vops, &mp->mnt_vn_fifo_ops); 526 527 return 0; 528 out: 529 dev->si_mountpoint = NULL; 530 if (bp) 531 brelse(bp); 532 if (pribp) 533 brelse(pribp); 534 if (supbp) 535 brelse(supbp); 536 if (needclose) { 537 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 538 VOP_CLOSE(devvp, FREAD, NULL); 539 vn_unlock(devvp); 540 } 541 if (isomp) { 542 kfree((caddr_t)isomp, M_ISOFSMNT); 543 mp->mnt_data = (qaddr_t)0; 544 } 545 return error; 546 } 547 548 /* 549 * unmount system call 550 */ 551 static int 552 cd9660_unmount(struct mount *mp, int mntflags) 553 { 554 struct iso_mnt *isomp; 555 int error, flags = 0; 556 557 if (mntflags & MNT_FORCE) 558 flags |= FORCECLOSE; 559 #if 0 560 mntflushbuf(mp, 0); 561 if (mntinvalbuf(mp)) 562 return EBUSY; 563 #endif 564 if ((error = vflush(mp, 0, flags))) 565 return (error); 566 567 isomp = VFSTOISOFS(mp); 568 569 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 570 if (isomp->im_d2l) 571 cd9660_iconv->close(isomp->im_d2l); 572 if (isomp->im_l2d) 573 cd9660_iconv->close(isomp->im_l2d); 574 } 575 576 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 577 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 578 error = VOP_CLOSE(isomp->im_devvp, FREAD, NULL); 579 vn_unlock(isomp->im_devvp); 580 vrele(isomp->im_devvp); 581 kfree((caddr_t)isomp, M_ISOFSMNT); 582 mp->mnt_data = (qaddr_t)0; 583 mp->mnt_flag &= ~MNT_LOCAL; 584 return (error); 585 } 586 587 /* 588 * Return root of a filesystem 589 */ 590 static int 591 cd9660_root(struct mount *mp, struct vnode **vpp) 592 { 593 struct iso_mnt *imp = VFSTOISOFS(mp); 594 struct iso_directory_record *dp = 595 (struct iso_directory_record *)imp->root; 596 ino_t ino = isodirino(dp, imp); 597 598 /* 599 * With RRIP we must use the `.' entry of the root directory. 600 * Simply tell vget, that it's a relocated directory. 601 */ 602 return (cd9660_vget_internal(mp, ino, vpp, 603 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 604 } 605 606 /* 607 * Get filesystem statistics. 608 */ 609 int 610 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 611 { 612 struct iso_mnt *isomp; 613 614 isomp = VFSTOISOFS(mp); 615 616 sbp->f_bsize = isomp->logical_block_size; 617 sbp->f_iosize = sbp->f_bsize; /* XXX */ 618 sbp->f_blocks = isomp->volume_space_size; 619 sbp->f_bfree = 0; /* total free blocks */ 620 sbp->f_bavail = 0; /* blocks free for non superuser */ 621 sbp->f_files = 0; /* total files */ 622 sbp->f_ffree = 0; /* free file nodes */ 623 if (sbp != &mp->mnt_stat) { 624 sbp->f_type = mp->mnt_vfc->vfc_typenum; 625 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 626 } 627 return 0; 628 } 629 630 /* 631 * File handle to vnode 632 * 633 * Have to be really careful about stale file handles: 634 * - check that the inode number is in range 635 * - call iget() to get the locked inode 636 * - check for an unallocated inode (i_mode == 0) 637 * - check that the generation number matches 638 */ 639 640 struct ifid { 641 ushort ifid_len; 642 ushort ifid_pad; 643 int ifid_ino; 644 long ifid_start; 645 }; 646 647 /* ARGSUSED */ 648 int 649 cd9660_fhtovp(struct mount *mp, struct vnode *rootvp, 650 struct fid *fhp, struct vnode **vpp) 651 { 652 struct ifid *ifhp = (struct ifid *)fhp; 653 struct iso_node *ip; 654 struct vnode *nvp; 655 int error; 656 657 #ifdef ISOFS_DBG 658 kprintf("fhtovp: ino %d, start %ld\n", 659 ifhp->ifid_ino, ifhp->ifid_start); 660 #endif 661 662 if ((error = VFS_VGET(mp, NULL, ifhp->ifid_ino, &nvp)) != 0) { 663 *vpp = NULLVP; 664 return (error); 665 } 666 ip = VTOI(nvp); 667 if (ip->inode.iso_mode == 0) { 668 vput(nvp); 669 *vpp = NULLVP; 670 return (ESTALE); 671 } 672 *vpp = nvp; 673 return (0); 674 } 675 676 int 677 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp, 678 struct ucred **credanonp) 679 { 680 struct netcred *np; 681 struct iso_mnt *imp; 682 683 imp = VFSTOISOFS(mp); 684 685 /* 686 * Get the export permission structure for this <mp, client> tuple. 687 */ 688 np = vfs_export_lookup(mp, &imp->im_export, nam); 689 if (np == NULL) 690 return (EACCES); 691 692 *exflagsp = np->netc_exflags; 693 *credanonp = &np->netc_anon; 694 return (0); 695 } 696 697 int 698 cd9660_vget(struct mount *mp, struct vnode *dvp, ino_t ino, struct vnode **vpp) 699 { 700 701 /* 702 * XXXX 703 * It would be nice if we didn't always set the `relocated' flag 704 * and force the extra read, but I don't want to think about fixing 705 * that right now. 706 */ 707 return (cd9660_vget_internal(mp, ino, vpp, 708 #if 0 709 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 710 #else 711 0, 712 #endif 713 NULL)); 714 } 715 716 int 717 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 718 int relocated, struct iso_directory_record *isodir) 719 { 720 struct iso_mnt *imp; 721 struct iso_node *ip; 722 struct buf *bp; 723 struct vnode *vp; 724 cdev_t dev; 725 int error; 726 727 imp = VFSTOISOFS(mp); 728 dev = imp->im_dev; 729 again: 730 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 731 return (0); 732 733 /* Allocate a new vnode/iso_node. */ 734 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0); 735 if (error) { 736 *vpp = NULLVP; 737 return (error); 738 } 739 ip = kmalloc(sizeof(struct iso_node), M_ISOFSNODE, M_WAITOK | M_ZERO); 740 ip->i_vnode = vp; 741 ip->i_dev = dev; 742 ip->i_number = ino; 743 744 /* 745 * Insert it into the inode hash table and check for a collision. 746 * If a collision occurs, throw away the vnode and try again. 747 */ 748 if (cd9660_ihashins(ip) != 0) { 749 kprintf("debug: cd9660 ihashins collision, retrying\n"); 750 vx_put(vp); 751 kfree(ip, M_ISOFSNODE); 752 goto again; 753 } 754 vp->v_data = ip; 755 756 if (isodir == NULL) { 757 int lbn, off; 758 759 lbn = lblkno(imp, ino); 760 if (lbn >= imp->volume_space_size) { 761 vx_put(vp); 762 kprintf("fhtovp: lbn exceed volume space %d\n", lbn); 763 return (ESTALE); 764 } 765 766 off = blkoff(imp, ino); 767 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 768 vx_put(vp); 769 kprintf("fhtovp: crosses block boundary %d\n", 770 off + ISO_DIRECTORY_RECORD_SIZE); 771 return (ESTALE); 772 } 773 774 error = bread(imp->im_devvp, 775 lblktooff(imp, lbn), 776 imp->logical_block_size, &bp); 777 if (error) { 778 vx_put(vp); 779 brelse(bp); 780 kprintf("fhtovp: bread error %d\n",error); 781 return (error); 782 } 783 isodir = (struct iso_directory_record *)(bp->b_data + off); 784 785 if (off + isonum_711(isodir->length) > 786 imp->logical_block_size) { 787 vx_put(vp); 788 if (bp != NULL) 789 brelse(bp); 790 kprintf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 791 off +isonum_711(isodir->length), off, 792 isonum_711(isodir->length)); 793 return (ESTALE); 794 } 795 796 #if 0 797 if (isonum_733(isodir->extent) + 798 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 799 if (bp != NULL) 800 brelse(bp); 801 kprintf("fhtovp: file start miss %d vs %d\n", 802 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 803 ifhp->ifid_start); 804 return (ESTALE); 805 } 806 #endif 807 } else 808 bp = NULL; 809 810 ip->i_mnt = imp; 811 ip->i_devvp = imp->im_devvp; 812 vref(ip->i_devvp); 813 814 if (relocated) { 815 /* 816 * On relocated directories we must 817 * read the `.' entry out of a dir. 818 */ 819 ip->iso_start = ino >> imp->im_bshift; 820 if (bp != NULL) 821 brelse(bp); 822 if ((error = cd9660_devblkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 823 vx_put(vp); 824 return (error); 825 } 826 isodir = (struct iso_directory_record *)bp->b_data; 827 } 828 829 ip->iso_extent = isonum_733(isodir->extent); 830 ip->i_size = isonum_733(isodir->size); 831 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 832 833 /* 834 * Setup time stamp, attribute 835 */ 836 vp->v_type = VNON; 837 switch (imp->iso_ftype) { 838 default: /* ISO_FTYPE_9660 */ 839 { 840 struct buf *bp2; 841 int off; 842 if ((imp->im_flags & ISOFSMNT_EXTATT) 843 && (off = isonum_711(isodir->ext_attr_length))) 844 cd9660_devblkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 845 &bp2); 846 else 847 bp2 = NULL; 848 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 849 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 850 if (bp2) 851 brelse(bp2); 852 break; 853 } 854 case ISO_FTYPE_RRIP: 855 cd9660_rrip_analyze(isodir, ip, imp); 856 break; 857 } 858 859 if (bp != NULL) 860 brelse(bp); 861 862 /* 863 * Initialize the associated vnode 864 */ 865 vp->v_type = IFTOVT(ip->inode.iso_mode); 866 867 switch (vp->v_type) { 868 case VFIFO: 869 vp->v_ops = &mp->mnt_vn_fifo_ops; 870 break; 871 case VCHR: 872 case VBLK: 873 vp->v_ops = &mp->mnt_vn_spec_ops; 874 addaliasu(vp, umajor(ip->inode.iso_rdev), 875 uminor(ip->inode.iso_rdev)); 876 break; 877 case VREG: 878 case VDIR: 879 vinitvmio(vp, ip->i_size, PAGE_SIZE, -1); 880 break; 881 default: 882 break; 883 } 884 885 if (ip->iso_extent == imp->root_extent) 886 vsetflags(vp, VROOT); 887 888 /* 889 * Return the locked and refd vp 890 */ 891 *vpp = vp; 892 return (0); 893 } 894 895 /* 896 * Vnode pointer to File handle 897 */ 898 /* ARGSUSED */ 899 int 900 cd9660_vptofh(struct vnode *vp, struct fid *fhp) 901 { 902 struct iso_node *ip = VTOI(vp); 903 struct ifid *ifhp; 904 905 ifhp = (struct ifid *)fhp; 906 ifhp->ifid_len = sizeof(struct ifid); 907 908 ifhp->ifid_ino = ip->i_number; 909 ifhp->ifid_start = ip->iso_start; 910 911 #ifdef ISOFS_DBG 912 kprintf("vptofh: ino %d, start %ld\n", 913 ifhp->ifid_ino,ifhp->ifid_start); 914 #endif 915 return 0; 916 } 917