1 /*- 2 * Copyright (c) 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley 6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 7 * Support code is derived from software contributed to Berkeley 8 * by Atsushi Murai (amurai@spec.co.jp). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 39 * $FreeBSD: src/sys/isofs/cd9660/cd9660_vfsops.c,v 1.74.2.7 2002/04/08 09:39:29 bde Exp $ 40 * $DragonFly: src/sys/vfs/isofs/cd9660/cd9660_vfsops.c,v 1.46 2008/09/17 21:44:23 dillon Exp $ 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/proc.h> 46 #include <sys/priv.h> 47 #include <sys/nlookup.h> 48 #include <sys/kernel.h> 49 #include <sys/vnode.h> 50 #include <sys/mount.h> 51 #include <sys/buf.h> 52 #include <sys/cdio.h> 53 #include <sys/conf.h> 54 #include <sys/fcntl.h> 55 #include <sys/malloc.h> 56 #include <sys/stat.h> 57 #include <sys/syslog.h> 58 #include <sys/iconv.h> 59 60 #include <vm/vm_zone.h> 61 62 #include "iso.h" 63 #include "iso_rrip.h" 64 #include "cd9660_node.h" 65 #include "cd9660_mount.h" 66 67 extern struct vop_ops cd9660_vnode_vops; 68 extern struct vop_ops cd9660_spec_vops; 69 extern struct vop_ops cd9660_fifo_vops; 70 71 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 72 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part"); 73 74 struct iconv_functions *cd9660_iconv = NULL; 75 76 static int cd9660_mount (struct mount *, char *, caddr_t, struct ucred *); 77 static int cd9660_unmount (struct mount *, int); 78 static int cd9660_root (struct mount *, struct vnode **); 79 static int cd9660_statfs (struct mount *, struct statfs *, struct ucred *); 80 static int cd9660_vget (struct mount *, struct vnode *, ino_t, struct vnode **); 81 static int cd9660_fhtovp (struct mount *, struct vnode *rootvp, 82 struct fid *, struct vnode **); 83 static int cd9660_checkexp (struct mount *, struct sockaddr *, 84 int *, struct ucred **); 85 static int cd9660_vptofh (struct vnode *, struct fid *); 86 87 static struct vfsops cd9660_vfsops = { 88 .vfs_mount = cd9660_mount, 89 .vfs_unmount = cd9660_unmount, 90 .vfs_root = cd9660_root, 91 .vfs_statfs = cd9660_statfs, 92 .vfs_sync = vfs_stdsync, 93 .vfs_vget = cd9660_vget, 94 .vfs_fhtovp = cd9660_fhtovp, 95 .vfs_checkexp = cd9660_checkexp, 96 .vfs_vptofh = cd9660_vptofh, 97 .vfs_init = cd9660_init, 98 .vfs_uninit = cd9660_uninit, 99 }; 100 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 101 MODULE_VERSION(cd9660, 1); 102 103 104 /* 105 * Called by vfs_mountroot when iso is going to be mounted as root. 106 */ 107 108 static int iso_get_ssector (cdev_t dev); 109 static int iso_mountfs (struct vnode *devvp, struct mount *mp, 110 struct iso_args *argp); 111 112 /* 113 * Try to find the start of the last data track on this CD-ROM. This 114 * is used to mount the last session of a multi-session CD. Bail out 115 * and return 0 if we fail, this is always a safe bet. 116 */ 117 static int 118 iso_get_ssector(cdev_t dev) 119 { 120 struct ioc_toc_header h; 121 struct ioc_read_toc_single_entry t; 122 int i; 123 124 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, 125 proc0.p_ucred, NULL) != 0) 126 return 0; 127 128 for (i = h.ending_track; i >= 0; i--) { 129 t.address_format = CD_LBA_FORMAT; 130 t.track = i; 131 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, 132 proc0.p_ucred, NULL) != 0) { 133 return 0; 134 } 135 if ((t.entry.control & 4) != 0) 136 /* found a data track */ 137 break; 138 } 139 140 if (i < 0) 141 return 0; 142 143 return ntohl(t.entry.addr.lba); 144 } 145 146 static int 147 iso_mountroot(struct mount *mp) 148 { 149 struct iso_args args; 150 struct vnode *rootvp; 151 int error; 152 153 if ((error = bdevvp(rootdev, &rootvp))) { 154 kprintf("iso_mountroot: can't find rootvp\n"); 155 return (error); 156 } 157 args.flags = ISOFSMNT_ROOT; 158 159 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY); 160 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL); 161 vn_unlock(rootvp); 162 if (error) 163 return (error); 164 165 args.ssector = iso_get_ssector(rootdev); 166 167 VOP_CLOSE(rootvp, FREAD); 168 169 if (bootverbose) 170 kprintf("iso_mountroot(): using session at block %d\n", 171 args.ssector); 172 if ((error = iso_mountfs(rootvp, mp, &args)) != 0) 173 return (error); 174 175 cd9660_statfs(mp, &mp->mnt_stat, proc0.p_ucred); 176 return (0); 177 } 178 179 /* 180 * VFS Operations. 181 * 182 * mount system call 183 */ 184 static int 185 cd9660_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) 186 { 187 struct vnode *devvp; 188 struct iso_args args; 189 size_t size; 190 int error; 191 mode_t accessmode; 192 struct iso_mnt *imp = 0; 193 struct nlookupdata nd; 194 195 if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) { 196 return (iso_mountroot(mp)); 197 } 198 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 199 return (error); 200 201 if ((mp->mnt_flag & MNT_RDONLY) == 0) 202 return (EROFS); 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_nch, 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); 238 error = VOP_EACCESS(devvp, accessmode, cred); 239 if (error) 240 error = priv_check_cred(cred, PRIV_ROOT, 0); 241 if (error) { 242 vput(devvp); 243 return (error); 244 } 245 vn_unlock(devvp); 246 247 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 248 error = iso_mountfs(devvp, mp, &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 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 261 &size); 262 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 263 cd9660_statfs(mp, &mp->mnt_stat, cred); 264 return 0; 265 } 266 267 /* 268 * Common code for mount and mountroot 269 */ 270 static int 271 iso_mountfs(struct vnode *devvp, struct mount *mp, struct iso_args *argp) 272 { 273 struct iso_mnt *isomp = NULL; 274 struct buf *bp = NULL; 275 struct buf *pribp = NULL, *supbp = NULL; 276 cdev_t dev; 277 int error = EINVAL; 278 int needclose = 0; 279 int high_sierra = 0; 280 int iso_bsize; 281 int iso_blknum; 282 int joliet_level; 283 struct iso_volume_descriptor *vdp = 0; 284 struct iso_primary_descriptor *pri = NULL; 285 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 286 struct iso_supplementary_descriptor *sup = NULL; 287 struct iso_directory_record *rootp; 288 int logical_block_size; 289 char cs_local[ICONV_CSNMAXLEN]; 290 char cs_disk[ICONV_CSNMAXLEN]; 291 292 if (!(mp->mnt_flag & MNT_RDONLY)) 293 return EROFS; 294 295 /* 296 * Disallow multiple mounts of the same device. 297 * Disallow mounting of a device that is currently in use 298 * Flush out any old buffers remaining from a previous use. 299 */ 300 if ((error = vfs_mountedon(devvp))) 301 return error; 302 if (vcount(devvp) > 0) 303 return EBUSY; 304 if ((error = vinvalbuf(devvp, V_SAVE, 0, 0))) 305 return (error); 306 307 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 308 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL); 309 vn_unlock(devvp); 310 if (error) 311 return error; 312 dev = devvp->v_rdev; 313 if (dev->si_iosize_max != 0) 314 mp->mnt_iosize_max = dev->si_iosize_max; 315 if (mp->mnt_iosize_max > MAXPHYS) 316 mp->mnt_iosize_max = MAXPHYS; 317 318 needclose = 1; 319 320 /* This is the "logical sector size". The standard says this 321 * should be 2048 or the physical sector size on the device, 322 * whichever is greater. For now, we'll just use a constant. 323 */ 324 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 325 326 joliet_level = 0; 327 for (iso_blknum = 16 + argp->ssector; 328 iso_blknum < 100 + argp->ssector; 329 iso_blknum++) { 330 if ((error = bread(devvp, (off_t)iso_blknum * iso_bsize, 331 iso_bsize, &bp)) != 0) 332 goto out; 333 334 vdp = (struct iso_volume_descriptor *)bp->b_data; 335 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 336 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 337 sizeof vdp->id) != 0) { 338 error = EINVAL; 339 goto out; 340 } else 341 high_sierra = 1; 342 } 343 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 344 case ISO_VD_PRIMARY: 345 if (pribp == NULL) { 346 pribp = bp; 347 bp = NULL; 348 pri = (struct iso_primary_descriptor *)vdp; 349 pri_sierra = 350 (struct iso_sierra_primary_descriptor *)vdp; 351 } 352 break; 353 354 case ISO_VD_SUPPLEMENTARY: 355 if (supbp == NULL) { 356 supbp = bp; 357 bp = NULL; 358 sup = (struct iso_supplementary_descriptor *)vdp; 359 360 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 361 if (bcmp(sup->escape, "%/@", 3) == 0) 362 joliet_level = 1; 363 if (bcmp(sup->escape, "%/C", 3) == 0) 364 joliet_level = 2; 365 if (bcmp(sup->escape, "%/E", 3) == 0) 366 joliet_level = 3; 367 368 if ((isonum_711 (sup->flags) & 1) && 369 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 370 joliet_level = 0; 371 } 372 } 373 break; 374 375 case ISO_VD_END: 376 goto vd_end; 377 378 default: 379 break; 380 } 381 if (bp) { 382 brelse(bp); 383 bp = NULL; 384 } 385 } 386 vd_end: 387 if (bp) { 388 brelse(bp); 389 bp = NULL; 390 } 391 392 if (pri == NULL) { 393 error = EINVAL; 394 goto out; 395 } 396 397 logical_block_size = 398 isonum_723 (high_sierra? 399 pri_sierra->logical_block_size: 400 pri->logical_block_size); 401 402 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 403 || (logical_block_size & (logical_block_size - 1)) != 0) { 404 error = EINVAL; 405 goto out; 406 } 407 408 rootp = (struct iso_directory_record *) 409 (high_sierra? 410 pri_sierra->root_directory_record: 411 pri->root_directory_record); 412 413 isomp = kmalloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 414 isomp->logical_block_size = logical_block_size; 415 isomp->volume_space_size = 416 isonum_733 (high_sierra? 417 pri_sierra->volume_space_size: 418 pri->volume_space_size); 419 isomp->joliet_level = 0; 420 /* 421 * Since an ISO9660 multi-session CD can also access previous 422 * sessions, we have to include them into the space consider- 423 * ations. This doesn't yield a very accurate number since 424 * parts of the old sessions might be inaccessible now, but we 425 * can't do much better. This is also important for the NFS 426 * filehandle validation. 427 */ 428 isomp->volume_space_size += argp->ssector; 429 bcopy (rootp, isomp->root, sizeof isomp->root); 430 isomp->root_extent = isonum_733 (rootp->extent); 431 isomp->root_size = isonum_733 (rootp->size); 432 433 isomp->im_bmask = logical_block_size - 1; 434 isomp->im_bshift = ffs(logical_block_size) - 1; 435 436 pribp->b_flags |= B_AGE; 437 brelse(pribp); 438 pribp = NULL; 439 440 mp->mnt_data = (qaddr_t)isomp; 441 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 442 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 443 mp->mnt_maxsymlinklen = 0; 444 mp->mnt_flag |= MNT_LOCAL; 445 isomp->im_mountp = mp; 446 isomp->im_dev = dev; 447 isomp->im_devvp = devvp; 448 449 dev->si_mountpoint = mp; 450 451 /* Check the Rock Ridge Extention support */ 452 if (!(argp->flags & ISOFSMNT_NORRIP)) { 453 if ((error = bread(isomp->im_devvp, 454 lblktooff(isomp, isomp->root_extent + isonum_711(rootp->ext_attr_length)), 455 isomp->logical_block_size, &bp)) != 0) 456 goto out; 457 458 rootp = (struct iso_directory_record *)bp->b_data; 459 460 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 461 argp->flags |= ISOFSMNT_NORRIP; 462 } else { 463 argp->flags &= ~ISOFSMNT_GENS; 464 } 465 466 /* 467 * The contents are valid, 468 * but they will get reread as part of another vnode, so... 469 */ 470 bp->b_flags |= B_AGE; 471 brelse(bp); 472 bp = NULL; 473 } 474 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 475 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | 476 ISOFSMNT_KICONV); 477 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 478 bcopy(argp->cs_local, cs_local, sizeof(cs_local)); 479 bcopy(argp->cs_disk, cs_disk, sizeof(cs_disk)); 480 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l); 481 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d); 482 } else { 483 isomp->im_d2l = NULL; 484 isomp->im_l2d = NULL; 485 } 486 487 if (high_sierra) { 488 /* this effectively ignores all the mount flags */ 489 log(LOG_INFO, "cd9660: High Sierra Format\n"); 490 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 491 } else { 492 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 493 default: 494 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 495 break; 496 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 497 isomp->iso_ftype = ISO_FTYPE_9660; 498 break; 499 case 0: 500 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 501 isomp->iso_ftype = ISO_FTYPE_RRIP; 502 break; 503 } 504 } 505 506 /* Decide whether to use the Joliet descriptor */ 507 508 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 509 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 510 rootp = (struct iso_directory_record *) 511 sup->root_directory_record; 512 bcopy (rootp, isomp->root, sizeof isomp->root); 513 isomp->root_extent = isonum_733 (rootp->extent); 514 isomp->root_size = isonum_733 (rootp->size); 515 isomp->joliet_level = joliet_level; 516 supbp->b_flags |= B_AGE; 517 } 518 519 if (supbp) { 520 brelse(supbp); 521 supbp = NULL; 522 } 523 524 vfs_add_vnodeops(mp, &cd9660_vnode_vops, &mp->mnt_vn_norm_ops); 525 vfs_add_vnodeops(mp, &cd9660_spec_vops, &mp->mnt_vn_spec_ops); 526 vfs_add_vnodeops(mp, &cd9660_fifo_vops, &mp->mnt_vn_fifo_ops); 527 528 return 0; 529 out: 530 dev->si_mountpoint = NULL; 531 if (bp) 532 brelse(bp); 533 if (pribp) 534 brelse(pribp); 535 if (supbp) 536 brelse(supbp); 537 if (needclose) 538 VOP_CLOSE(devvp, FREAD); 539 if (isomp) { 540 kfree((caddr_t)isomp, M_ISOFSMNT); 541 mp->mnt_data = (qaddr_t)0; 542 } 543 return error; 544 } 545 546 /* 547 * unmount system call 548 */ 549 static int 550 cd9660_unmount(struct mount *mp, int mntflags) 551 { 552 struct iso_mnt *isomp; 553 int error, flags = 0; 554 555 if (mntflags & MNT_FORCE) 556 flags |= FORCECLOSE; 557 #if 0 558 mntflushbuf(mp, 0); 559 if (mntinvalbuf(mp)) 560 return EBUSY; 561 #endif 562 if ((error = vflush(mp, 0, flags))) 563 return (error); 564 565 isomp = VFSTOISOFS(mp); 566 567 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 568 if (isomp->im_d2l) 569 cd9660_iconv->close(isomp->im_d2l); 570 if (isomp->im_l2d) 571 cd9660_iconv->close(isomp->im_l2d); 572 } 573 574 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 575 error = VOP_CLOSE(isomp->im_devvp, FREAD); 576 vrele(isomp->im_devvp); 577 kfree((caddr_t)isomp, M_ISOFSMNT); 578 mp->mnt_data = (qaddr_t)0; 579 mp->mnt_flag &= ~MNT_LOCAL; 580 return (error); 581 } 582 583 /* 584 * Return root of a filesystem 585 */ 586 static int 587 cd9660_root(struct mount *mp, struct vnode **vpp) 588 { 589 struct iso_mnt *imp = VFSTOISOFS(mp); 590 struct iso_directory_record *dp = 591 (struct iso_directory_record *)imp->root; 592 ino_t ino = isodirino(dp, imp); 593 594 /* 595 * With RRIP we must use the `.' entry of the root directory. 596 * Simply tell vget, that it's a relocated directory. 597 */ 598 return (cd9660_vget_internal(mp, ino, vpp, 599 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 600 } 601 602 /* 603 * Get file system statistics. 604 */ 605 int 606 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 607 { 608 struct iso_mnt *isomp; 609 610 isomp = VFSTOISOFS(mp); 611 612 sbp->f_bsize = isomp->logical_block_size; 613 sbp->f_iosize = sbp->f_bsize; /* XXX */ 614 sbp->f_blocks = isomp->volume_space_size; 615 sbp->f_bfree = 0; /* total free blocks */ 616 sbp->f_bavail = 0; /* blocks free for non superuser */ 617 sbp->f_files = 0; /* total files */ 618 sbp->f_ffree = 0; /* free file nodes */ 619 if (sbp != &mp->mnt_stat) { 620 sbp->f_type = mp->mnt_vfc->vfc_typenum; 621 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 622 } 623 return 0; 624 } 625 626 /* 627 * File handle to vnode 628 * 629 * Have to be really careful about stale file handles: 630 * - check that the inode number is in range 631 * - call iget() to get the locked inode 632 * - check for an unallocated inode (i_mode == 0) 633 * - check that the generation number matches 634 */ 635 636 struct ifid { 637 ushort ifid_len; 638 ushort ifid_pad; 639 int ifid_ino; 640 long ifid_start; 641 }; 642 643 /* ARGSUSED */ 644 int 645 cd9660_fhtovp(struct mount *mp, struct vnode *rootvp, 646 struct fid *fhp, struct vnode **vpp) 647 { 648 struct ifid *ifhp = (struct ifid *)fhp; 649 struct iso_node *ip; 650 struct vnode *nvp; 651 int error; 652 653 #ifdef ISOFS_DBG 654 kprintf("fhtovp: ino %d, start %ld\n", 655 ifhp->ifid_ino, ifhp->ifid_start); 656 #endif 657 658 if ((error = VFS_VGET(mp, NULL, ifhp->ifid_ino, &nvp)) != 0) { 659 *vpp = NULLVP; 660 return (error); 661 } 662 ip = VTOI(nvp); 663 if (ip->inode.iso_mode == 0) { 664 vput(nvp); 665 *vpp = NULLVP; 666 return (ESTALE); 667 } 668 *vpp = nvp; 669 return (0); 670 } 671 672 int 673 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp, 674 struct ucred **credanonp) 675 { 676 struct netcred *np; 677 struct iso_mnt *imp; 678 679 imp = VFSTOISOFS(mp); 680 681 /* 682 * Get the export permission structure for this <mp, client> tuple. 683 */ 684 np = vfs_export_lookup(mp, &imp->im_export, nam); 685 if (np == NULL) 686 return (EACCES); 687 688 *exflagsp = np->netc_exflags; 689 *credanonp = &np->netc_anon; 690 return (0); 691 } 692 693 int 694 cd9660_vget(struct mount *mp, struct vnode *dvp, ino_t ino, struct vnode **vpp) 695 { 696 697 /* 698 * XXXX 699 * It would be nice if we didn't always set the `relocated' flag 700 * and force the extra read, but I don't want to think about fixing 701 * that right now. 702 */ 703 return (cd9660_vget_internal(mp, ino, vpp, 704 #if 0 705 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 706 #else 707 0, 708 #endif 709 NULL)); 710 } 711 712 int 713 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 714 int relocated, struct iso_directory_record *isodir) 715 { 716 struct iso_mnt *imp; 717 struct iso_node *ip; 718 struct buf *bp; 719 struct vnode *vp; 720 cdev_t dev; 721 int error; 722 723 imp = VFSTOISOFS(mp); 724 dev = imp->im_dev; 725 again: 726 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) 727 return (0); 728 729 /* Allocate a new vnode/iso_node. */ 730 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0); 731 if (error) { 732 *vpp = NULLVP; 733 return (error); 734 } 735 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 736 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 = 0; 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