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 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/proc.h> 45 #include <sys/priv.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 #include <sys/iconv.h> 58 59 #include <vm/vm_zone.h> 60 61 #include <sys/buf2.h> 62 63 #include "iso.h" 64 #include "iso_rrip.h" 65 #include "cd9660_node.h" 66 #include "cd9660_mount.h" 67 68 extern struct vop_ops cd9660_vnode_vops; 69 extern struct vop_ops cd9660_spec_vops; 70 extern struct vop_ops cd9660_fifo_vops; 71 72 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 73 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part"); 74 75 struct iconv_functions *cd9660_iconv = NULL; 76 77 static int cd9660_mount (struct mount *, char *, caddr_t, struct ucred *); 78 static int cd9660_unmount (struct mount *, int); 79 static int cd9660_root (struct mount *, struct vnode **); 80 static int cd9660_statfs (struct mount *, struct statfs *, struct ucred *); 81 static int cd9660_vget (struct mount *, struct vnode *, ino_t, struct vnode **); 82 static int cd9660_fhtovp (struct mount *, struct vnode *rootvp, 83 struct fid *, struct vnode **); 84 static int cd9660_checkexp (struct mount *, struct sockaddr *, 85 int *, struct ucred **); 86 static int cd9660_vptofh (struct vnode *, struct fid *); 87 88 static struct vfsops cd9660_vfsops = { 89 .vfs_mount = cd9660_mount, 90 .vfs_unmount = cd9660_unmount, 91 .vfs_root = cd9660_root, 92 .vfs_statfs = cd9660_statfs, 93 .vfs_sync = vfs_stdsync, 94 .vfs_vget = cd9660_vget, 95 .vfs_fhtovp = cd9660_fhtovp, 96 .vfs_checkexp = cd9660_checkexp, 97 .vfs_vptofh = cd9660_vptofh, 98 .vfs_init = cd9660_init, 99 .vfs_uninit = cd9660_uninit, 100 }; 101 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 102 MODULE_VERSION(cd9660, 1); 103 104 105 /* 106 * Called by vfs_mountroot when iso is going to be mounted as root. 107 */ 108 109 static int iso_get_ssector (cdev_t dev); 110 static int iso_mountfs (struct vnode *devvp, struct mount *mp, 111 struct iso_args *argp); 112 113 /* 114 * Try to find the start of the last data track on this CD-ROM. This 115 * is used to mount the last session of a multi-session CD. Bail out 116 * and return 0 if we fail, this is always a safe bet. 117 */ 118 static int 119 iso_get_ssector(cdev_t dev) 120 { 121 struct ioc_toc_header h; 122 struct ioc_read_toc_single_entry t; 123 int i; 124 125 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, 126 proc0.p_ucred, NULL) != 0) 127 return 0; 128 129 for (i = h.ending_track; i >= 0; i--) { 130 t.address_format = CD_LBA_FORMAT; 131 t.track = i; 132 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, 133 proc0.p_ucred, NULL) != 0) { 134 return 0; 135 } 136 if ((t.entry.control & 4) != 0) 137 /* found a data track */ 138 break; 139 } 140 141 if (i < 0) 142 return 0; 143 144 return ntohl(t.entry.addr.lba); 145 } 146 147 static int 148 iso_mountroot(struct mount *mp) 149 { 150 struct iso_args args; 151 struct vnode *rootvp; 152 int error; 153 154 if ((error = bdevvp(rootdev, &rootvp))) { 155 kprintf("iso_mountroot: can't find rootvp\n"); 156 return (error); 157 } 158 args.flags = ISOFSMNT_ROOT; 159 160 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY); 161 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL); 162 vn_unlock(rootvp); 163 if (error) 164 return (error); 165 166 args.ssector = iso_get_ssector(rootdev); 167 168 VOP_CLOSE(rootvp, FREAD); 169 170 if (bootverbose) 171 kprintf("iso_mountroot(): using session at block %d\n", 172 args.ssector); 173 if ((error = iso_mountfs(rootvp, mp, &args)) != 0) 174 return (error); 175 176 cd9660_statfs(mp, &mp->mnt_stat, proc0.p_ucred); 177 return (0); 178 } 179 180 /* 181 * VFS Operations. 182 * 183 * mount system call 184 */ 185 static int 186 cd9660_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) 187 { 188 struct vnode *devvp; 189 struct iso_args args; 190 size_t size; 191 int error; 192 mode_t accessmode; 193 struct iso_mnt *imp = NULL; 194 struct nlookupdata nd; 195 196 if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) { 197 return (iso_mountroot(mp)); 198 } 199 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 200 return (error); 201 202 if ((mp->mnt_flag & MNT_RDONLY) == 0) 203 return (EROFS); 204 205 /* 206 * If updating, check whether changing from read-only to 207 * read/write; if there is no device name, that's all we do. 208 */ 209 if (mp->mnt_flag & MNT_UPDATE) { 210 imp = VFSTOISOFS(mp); 211 if (args.fspec == 0) 212 return (vfs_export(mp, &imp->im_export, &args.export)); 213 } 214 /* 215 * Not an update, or updating the name: look up the name 216 * and verify that it refers to a sensible block device. 217 */ 218 devvp = NULL; 219 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW); 220 if (error == 0) 221 error = nlookup(&nd); 222 if (error == 0) 223 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp); 224 nlookup_done(&nd); 225 if (error) 226 return (error); 227 228 if (!vn_isdisk(devvp, &error)) { 229 vrele(devvp); 230 return (error); 231 } 232 233 /* 234 * Verify that user has necessary permissions on the device, 235 * or has superuser abilities 236 */ 237 accessmode = VREAD; 238 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 239 error = VOP_EACCESS(devvp, accessmode, cred); 240 if (error) 241 error = priv_check_cred(cred, PRIV_ROOT, 0); 242 if (error) { 243 vput(devvp); 244 return (error); 245 } 246 vn_unlock(devvp); 247 248 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 249 error = iso_mountfs(devvp, mp, &args); 250 } else { 251 if (devvp != imp->im_devvp) 252 error = EINVAL; /* needs translation */ 253 else 254 vrele(devvp); 255 } 256 if (error) { 257 vrele(devvp); 258 return error; 259 } 260 imp = VFSTOISOFS(mp); 261 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 262 &size); 263 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 264 cd9660_statfs(mp, &mp->mnt_stat, cred); 265 return 0; 266 } 267 268 /* 269 * Common code for mount and mountroot 270 */ 271 static int 272 iso_mountfs(struct vnode *devvp, struct mount *mp, struct iso_args *argp) 273 { 274 struct iso_mnt *isomp = NULL; 275 struct buf *bp = NULL; 276 struct buf *pribp = NULL, *supbp = NULL; 277 cdev_t dev; 278 int error = EINVAL; 279 int needclose = 0; 280 int high_sierra = 0; 281 int iso_bsize; 282 int iso_blknum; 283 int joliet_level; 284 struct iso_volume_descriptor *vdp = NULL; 285 struct iso_primary_descriptor *pri = NULL; 286 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 287 struct iso_supplementary_descriptor *sup = NULL; 288 struct iso_directory_record *rootp; 289 int logical_block_size; 290 char cs_local[ICONV_CSNMAXLEN]; 291 char cs_disk[ICONV_CSNMAXLEN]; 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 (vcount(devvp) > 0) 304 return EBUSY; 305 if ((error = vinvalbuf(devvp, V_SAVE, 0, 0))) 306 return (error); 307 308 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 309 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL); 310 vn_unlock(devvp); 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, (off_t)iso_blknum * 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 = kmalloc(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 lblktooff(isomp, isomp->root_extent + isonum_711(rootp->ext_attr_length)), 456 isomp->logical_block_size, &bp)) != 0) 457 goto out; 458 459 rootp = (struct iso_directory_record *)bp->b_data; 460 461 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 462 argp->flags |= ISOFSMNT_NORRIP; 463 } else { 464 argp->flags &= ~ISOFSMNT_GENS; 465 } 466 467 /* 468 * The contents are valid, 469 * but they will get reread as part of another vnode, so... 470 */ 471 bp->b_flags |= B_AGE; 472 brelse(bp); 473 bp = NULL; 474 } 475 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 476 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | 477 ISOFSMNT_KICONV); 478 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 479 bcopy(argp->cs_local, cs_local, sizeof(cs_local)); 480 bcopy(argp->cs_disk, cs_disk, sizeof(cs_disk)); 481 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l); 482 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d); 483 } else { 484 isomp->im_d2l = NULL; 485 isomp->im_l2d = NULL; 486 } 487 488 if (high_sierra) { 489 /* this effectively ignores all the mount flags */ 490 log(LOG_INFO, "cd9660: High Sierra Format\n"); 491 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 492 } else { 493 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 494 default: 495 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 496 break; 497 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 498 isomp->iso_ftype = ISO_FTYPE_9660; 499 break; 500 case 0: 501 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 502 isomp->iso_ftype = ISO_FTYPE_RRIP; 503 break; 504 } 505 } 506 507 /* Decide whether to use the Joliet descriptor */ 508 509 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 510 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 511 rootp = (struct iso_directory_record *) 512 sup->root_directory_record; 513 bcopy (rootp, isomp->root, sizeof isomp->root); 514 isomp->root_extent = isonum_733 (rootp->extent); 515 isomp->root_size = isonum_733 (rootp->size); 516 isomp->joliet_level = joliet_level; 517 supbp->b_flags |= B_AGE; 518 } 519 520 if (supbp) { 521 brelse(supbp); 522 supbp = NULL; 523 } 524 525 vfs_add_vnodeops(mp, &cd9660_vnode_vops, &mp->mnt_vn_norm_ops); 526 vfs_add_vnodeops(mp, &cd9660_spec_vops, &mp->mnt_vn_spec_ops); 527 vfs_add_vnodeops(mp, &cd9660_fifo_vops, &mp->mnt_vn_fifo_ops); 528 529 return 0; 530 out: 531 dev->si_mountpoint = NULL; 532 if (bp) 533 brelse(bp); 534 if (pribp) 535 brelse(pribp); 536 if (supbp) 537 brelse(supbp); 538 if (needclose) 539 VOP_CLOSE(devvp, FREAD); 540 if (isomp) { 541 kfree((caddr_t)isomp, M_ISOFSMNT); 542 mp->mnt_data = (qaddr_t)0; 543 } 544 return error; 545 } 546 547 /* 548 * unmount system call 549 */ 550 static int 551 cd9660_unmount(struct mount *mp, int mntflags) 552 { 553 struct iso_mnt *isomp; 554 int error, flags = 0; 555 556 if (mntflags & MNT_FORCE) 557 flags |= FORCECLOSE; 558 #if 0 559 mntflushbuf(mp, 0); 560 if (mntinvalbuf(mp)) 561 return EBUSY; 562 #endif 563 if ((error = vflush(mp, 0, flags))) 564 return (error); 565 566 isomp = VFSTOISOFS(mp); 567 568 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 569 if (isomp->im_d2l) 570 cd9660_iconv->close(isomp->im_d2l); 571 if (isomp->im_l2d) 572 cd9660_iconv->close(isomp->im_l2d); 573 } 574 575 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 576 error = VOP_CLOSE(isomp->im_devvp, FREAD); 577 vrele(isomp->im_devvp); 578 kfree((caddr_t)isomp, M_ISOFSMNT); 579 mp->mnt_data = (qaddr_t)0; 580 mp->mnt_flag &= ~MNT_LOCAL; 581 return (error); 582 } 583 584 /* 585 * Return root of a filesystem 586 */ 587 static int 588 cd9660_root(struct mount *mp, struct vnode **vpp) 589 { 590 struct iso_mnt *imp = VFSTOISOFS(mp); 591 struct iso_directory_record *dp = 592 (struct iso_directory_record *)imp->root; 593 ino_t ino = isodirino(dp, imp); 594 595 /* 596 * With RRIP we must use the `.' entry of the root directory. 597 * Simply tell vget, that it's a relocated directory. 598 */ 599 return (cd9660_vget_internal(mp, ino, vpp, 600 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 601 } 602 603 /* 604 * Get file system statistics. 605 */ 606 int 607 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 608 { 609 struct iso_mnt *isomp; 610 611 isomp = VFSTOISOFS(mp); 612 613 sbp->f_bsize = isomp->logical_block_size; 614 sbp->f_iosize = sbp->f_bsize; /* XXX */ 615 sbp->f_blocks = isomp->volume_space_size; 616 sbp->f_bfree = 0; /* total free blocks */ 617 sbp->f_bavail = 0; /* blocks free for non superuser */ 618 sbp->f_files = 0; /* total files */ 619 sbp->f_ffree = 0; /* free file nodes */ 620 if (sbp != &mp->mnt_stat) { 621 sbp->f_type = mp->mnt_vfc->vfc_typenum; 622 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 623 } 624 return 0; 625 } 626 627 /* 628 * File handle to vnode 629 * 630 * Have to be really careful about stale file handles: 631 * - check that the inode number is in range 632 * - call iget() to get the locked inode 633 * - check for an unallocated inode (i_mode == 0) 634 * - check that the generation number matches 635 */ 636 637 struct ifid { 638 ushort ifid_len; 639 ushort ifid_pad; 640 int ifid_ino; 641 long ifid_start; 642 }; 643 644 /* ARGSUSED */ 645 int 646 cd9660_fhtovp(struct mount *mp, struct vnode *rootvp, 647 struct fid *fhp, struct vnode **vpp) 648 { 649 struct ifid *ifhp = (struct ifid *)fhp; 650 struct iso_node *ip; 651 struct vnode *nvp; 652 int error; 653 654 #ifdef ISOFS_DBG 655 kprintf("fhtovp: ino %d, start %ld\n", 656 ifhp->ifid_ino, ifhp->ifid_start); 657 #endif 658 659 if ((error = VFS_VGET(mp, NULL, ifhp->ifid_ino, &nvp)) != 0) { 660 *vpp = NULLVP; 661 return (error); 662 } 663 ip = VTOI(nvp); 664 if (ip->inode.iso_mode == 0) { 665 vput(nvp); 666 *vpp = NULLVP; 667 return (ESTALE); 668 } 669 *vpp = nvp; 670 return (0); 671 } 672 673 int 674 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp, 675 struct ucred **credanonp) 676 { 677 struct netcred *np; 678 struct iso_mnt *imp; 679 680 imp = VFSTOISOFS(mp); 681 682 /* 683 * Get the export permission structure for this <mp, client> tuple. 684 */ 685 np = vfs_export_lookup(mp, &imp->im_export, nam); 686 if (np == NULL) 687 return (EACCES); 688 689 *exflagsp = np->netc_exflags; 690 *credanonp = &np->netc_anon; 691 return (0); 692 } 693 694 int 695 cd9660_vget(struct mount *mp, struct vnode *dvp, ino_t ino, struct vnode **vpp) 696 { 697 698 /* 699 * XXXX 700 * It would be nice if we didn't always set the `relocated' flag 701 * and force the extra read, but I don't want to think about fixing 702 * that right now. 703 */ 704 return (cd9660_vget_internal(mp, ino, vpp, 705 #if 0 706 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 707 #else 708 0, 709 #endif 710 NULL)); 711 } 712 713 int 714 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 715 int relocated, struct iso_directory_record *isodir) 716 { 717 struct iso_mnt *imp; 718 struct iso_node *ip; 719 struct buf *bp; 720 struct vnode *vp; 721 cdev_t dev; 722 int error; 723 724 imp = VFSTOISOFS(mp); 725 dev = imp->im_dev; 726 again: 727 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 728 return (0); 729 730 /* Allocate a new vnode/iso_node. */ 731 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0); 732 if (error) { 733 *vpp = NULLVP; 734 return (error); 735 } 736 ip = kmalloc(sizeof(struct iso_node), M_ISOFSNODE, M_WAITOK | M_ZERO); 737 ip->i_vnode = vp; 738 ip->i_dev = dev; 739 ip->i_number = ino; 740 741 /* 742 * Insert it into the inode hash table and check for a collision. 743 * If a collision occurs, throw away the vnode and try again. 744 */ 745 if (cd9660_ihashins(ip) != 0) { 746 kprintf("debug: cd9660 ihashins collision, retrying\n"); 747 vx_put(vp); 748 kfree(ip, M_ISOFSNODE); 749 goto again; 750 } 751 vp->v_data = ip; 752 753 if (isodir == NULL) { 754 int lbn, off; 755 756 lbn = lblkno(imp, ino); 757 if (lbn >= imp->volume_space_size) { 758 vx_put(vp); 759 kprintf("fhtovp: lbn exceed volume space %d\n", lbn); 760 return (ESTALE); 761 } 762 763 off = blkoff(imp, ino); 764 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 765 vx_put(vp); 766 kprintf("fhtovp: crosses block boundary %d\n", 767 off + ISO_DIRECTORY_RECORD_SIZE); 768 return (ESTALE); 769 } 770 771 error = bread(imp->im_devvp, 772 lblktooff(imp, lbn), 773 imp->logical_block_size, &bp); 774 if (error) { 775 vx_put(vp); 776 brelse(bp); 777 kprintf("fhtovp: bread error %d\n",error); 778 return (error); 779 } 780 isodir = (struct iso_directory_record *)(bp->b_data + off); 781 782 if (off + isonum_711(isodir->length) > 783 imp->logical_block_size) { 784 vx_put(vp); 785 if (bp != NULL) 786 brelse(bp); 787 kprintf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 788 off +isonum_711(isodir->length), off, 789 isonum_711(isodir->length)); 790 return (ESTALE); 791 } 792 793 #if 0 794 if (isonum_733(isodir->extent) + 795 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 796 if (bp != NULL) 797 brelse(bp); 798 kprintf("fhtovp: file start miss %d vs %d\n", 799 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 800 ifhp->ifid_start); 801 return (ESTALE); 802 } 803 #endif 804 } else 805 bp = NULL; 806 807 ip->i_mnt = imp; 808 ip->i_devvp = imp->im_devvp; 809 vref(ip->i_devvp); 810 811 if (relocated) { 812 /* 813 * On relocated directories we must 814 * read the `.' entry out of a dir. 815 */ 816 ip->iso_start = ino >> imp->im_bshift; 817 if (bp != NULL) 818 brelse(bp); 819 if ((error = cd9660_devblkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 820 vx_put(vp); 821 return (error); 822 } 823 isodir = (struct iso_directory_record *)bp->b_data; 824 } 825 826 ip->iso_extent = isonum_733(isodir->extent); 827 ip->i_size = isonum_733(isodir->size); 828 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 829 830 /* 831 * Setup time stamp, attribute 832 */ 833 vp->v_type = VNON; 834 switch (imp->iso_ftype) { 835 default: /* ISO_FTYPE_9660 */ 836 { 837 struct buf *bp2; 838 int off; 839 if ((imp->im_flags & ISOFSMNT_EXTATT) 840 && (off = isonum_711(isodir->ext_attr_length))) 841 cd9660_devblkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 842 &bp2); 843 else 844 bp2 = NULL; 845 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 846 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 847 if (bp2) 848 brelse(bp2); 849 break; 850 } 851 case ISO_FTYPE_RRIP: 852 cd9660_rrip_analyze(isodir, ip, imp); 853 break; 854 } 855 856 if (bp != NULL) 857 brelse(bp); 858 859 /* 860 * Initialize the associated vnode 861 */ 862 vp->v_type = IFTOVT(ip->inode.iso_mode); 863 864 switch (vp->v_type) { 865 case VFIFO: 866 vp->v_ops = &mp->mnt_vn_fifo_ops; 867 break; 868 case VCHR: 869 case VBLK: 870 vp->v_ops = &mp->mnt_vn_spec_ops; 871 addaliasu(vp, umajor(ip->inode.iso_rdev), 872 uminor(ip->inode.iso_rdev)); 873 break; 874 case VREG: 875 case VDIR: 876 vinitvmio(vp, ip->i_size, PAGE_SIZE, -1); 877 break; 878 default: 879 break; 880 } 881 882 if (ip->iso_extent == imp->root_extent) 883 vsetflags(vp, VROOT); 884 885 /* 886 * Return the locked and refd vp 887 */ 888 *vpp = vp; 889 return (0); 890 } 891 892 /* 893 * Vnode pointer to File handle 894 */ 895 /* ARGSUSED */ 896 int 897 cd9660_vptofh(struct vnode *vp, struct fid *fhp) 898 { 899 struct iso_node *ip = VTOI(vp); 900 struct ifid *ifhp; 901 902 ifhp = (struct ifid *)fhp; 903 ifhp->ifid_len = sizeof(struct ifid); 904 905 ifhp->ifid_ino = ip->i_number; 906 ifhp->ifid_start = ip->iso_start; 907 908 #ifdef ISOFS_DBG 909 kprintf("vptofh: ino %d, start %ld\n", 910 ifhp->ifid_ino,ifhp->ifid_start); 911 #endif 912 return 0; 913 } 914