sys/fs/cd9660/cd9660_vfsops.c

   1 /*      $NetBSD: cd9660_vfsops.c,v 1.68 2009/10/19 17:53:36 tsutsui Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley
   8  * by Pace Willisson (pace@blitz.com).  The Rock Ridge Extension
   9  * Support code is derived from software contributed to Berkeley
  10  * by Atsushi Murai (amurai@spec.co.jp).
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)cd9660_vfsops.c     8.18 (Berkeley) 5/22/95
  37  */
  38
  39 #include <sys/cdefs.h>
  40 __KERNEL_RCSID(0, "$NetBSD: cd9660_vfsops.c,v 1.68 2009/10/19 17:53:36 tsutsui Exp $");
  41
  42 #if defined(_KERNEL_OPT)
  43 #include "opt_compat_netbsd.h"
  44 #endif
  45
  46 #include <sys/param.h>
  47 #include <sys/sysctl.h>
  48 #include <sys/systm.h>
  49 #include <sys/namei.h>
  50 #include <sys/proc.h>
  51 #include <sys/kernel.h>
  52 #include <sys/vnode.h>
  53 #include <miscfs/genfs/genfs.h>
  54 #include <miscfs/specfs/specdev.h>
  55 #include <sys/mount.h>
  56 #include <sys/buf.h>
  57 #include <sys/file.h>
  58 #include <sys/disklabel.h>
  59 #include <sys/device.h>
  60 #include <sys/ioctl.h>
  61 #include <sys/cdio.h>
  62 #include <sys/errno.h>
  63 #include <sys/malloc.h>
  64 #include <sys/pool.h>
  65 #include <sys/stat.h>
  66 #include <sys/conf.h>
  67 #include <sys/dirent.h>
  68 #include <sys/kauth.h>
  69 #include <sys/module.h>
  70
  71 #include <fs/cd9660/iso.h>
  72 #include <fs/cd9660/cd9660_extern.h>
  73 #include <fs/cd9660/iso_rrip.h>
  74 #include <fs/cd9660/cd9660_node.h>
  75 #include <fs/cd9660/cd9660_mount.h>
  76
  77 MODULE(MODULE_CLASS_VFS, cd9660, NULL);
  78
  79 MALLOC_JUSTDEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
  80
  81 static struct sysctllog *cd9660_sysctl_log;
  82
  83 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc;
  84 extern const struct vnodeopv_desc cd9660_specop_opv_desc;
  85 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc;
  86
  87 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = {
  88         &cd9660_vnodeop_opv_desc,
  89         &cd9660_specop_opv_desc,
  90         &cd9660_fifoop_opv_desc,
  91         NULL,
  92 };
  93
  94 struct vfsops cd9660_vfsops = {
  95         MOUNT_CD9660,
  96         sizeof (struct iso_args),
  97         cd9660_mount,
  98         cd9660_start,
  99         cd9660_unmount,
 100         cd9660_root,
 101         (void *)eopnotsupp,
 102         cd9660_statvfs,
 103         cd9660_sync,
 104         cd9660_vget,
 105         cd9660_fhtovp,
 106         cd9660_vptofh,
 107         cd9660_init,
 108         cd9660_reinit,
 109         cd9660_done,
 110         cd9660_mountroot,
 111         (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp,
 112         vfs_stdextattrctl,
 113         (void *)eopnotsupp,             /* vfs_suspendctl */
 114         genfs_renamelock_enter,
 115         genfs_renamelock_exit,
 116         (void *)eopnotsupp,
 117         cd9660_vnodeopv_descs,
 118         0,      /* refcount */
 119         { NULL, NULL } /* list */
 120 };
 121
 122 static const struct genfs_ops cd9660_genfsops = {
 123         .gop_size = genfs_size,
 124 };
 125
 126 /*
 127  * Called by vfs_mountroot when iso is going to be mounted as root.
 128  *
 129  * Name is updated by mount(8) after booting.
 130  */
 131 #define ROOTNAME        "root_device"
 132
 133 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len);
 134 static int iso_mountfs(struct vnode *devvp, struct mount *mp,
 135                 struct lwp *l, struct iso_args *argp);
 136
 137 static int
 138 cd9660_modcmd(modcmd_t cmd, void *arg)
 139 {
 140         int error;
 141
 142         switch (cmd) {
 143         case MODULE_CMD_INIT:
 144                 error = vfs_attach(&cd9660_vfsops);
 145                 if (error != 0)
 146                         break;
 147                 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL,
 148                                CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL,
 149                                NULL, 0, NULL, 0,
 150                                CTL_VFS, CTL_EOL);
 151                 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL,
 152                                CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660",
 153                                SYSCTL_DESCR("ISO-9660 file system"),
 154                                NULL, 0, NULL, 0,
 155                                CTL_VFS, 14, CTL_EOL);
 156                 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL,
 157                                CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
 158                                CTLTYPE_INT, "utf8_joliet",
 159                                SYSCTL_DESCR("Encode Joliet filenames to UTF-8"),
 160                                NULL, 0, &cd9660_utf8_joliet, 0,
 161                                CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL);
 162                 /*
 163                  * XXX the "14" above could be dynamic, thereby eliminating
 164                  * one more instance of the "number to vfs" mapping problem,
 165                  * but "14" is the order as taken from sys/mount.h
 166                  */
 167                 break;
 168         case MODULE_CMD_FINI:
 169                 error = vfs_detach(&cd9660_vfsops);
 170                 if (error != 0)
 171                         break;
 172                 sysctl_teardown(&cd9660_sysctl_log);
 173                 break;
 174         default:
 175                 error = ENOTTY;
 176                 break;
 177         }
 178
 179         return (error);
 180 }
 181
 182 int
 183 cd9660_mountroot(void)
 184 {
 185         struct mount *mp;
 186         struct lwp *l = curlwp;
 187         int error;
 188         struct iso_args args;
 189
 190         if (device_class(root_device) != DV_DISK)
 191                 return (ENODEV);
 192
 193         if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp))
 194                         != 0) {
 195                 vrele(rootvp);
 196                 return (error);
 197         }
 198
 199         args.flags = ISOFSMNT_ROOT;
 200         if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) {
 201                 vfs_unbusy(mp, false, NULL);
 202                 vfs_destroy(mp);
 203                 return (error);
 204         }
 205         mutex_enter(&mountlist_lock);
 206         CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
 207         mutex_exit(&mountlist_lock);
 208         (void)cd9660_statvfs(mp, &mp->mnt_stat);
 209         vfs_unbusy(mp, false, NULL);
 210         return (0);
 211 }
 212
 213 /*
 214  * VFS Operations.
 215  *
 216  * mount system call
 217  */
 218 int
 219 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
 220 {
 221         struct lwp *l = curlwp;
 222         struct vnode *devvp;
 223         struct iso_args *args = data;
 224         int error;
 225         struct iso_mnt *imp = VFSTOISOFS(mp);
 226
 227         if (*data_len < sizeof *args)
 228                 return EINVAL;
 229
 230         if (mp->mnt_flag & MNT_GETARGS) {
 231                 if (imp == NULL)
 232                         return EIO;
 233                 args->fspec = NULL;
 234                 args->flags = imp->im_flags;
 235                 *data_len = sizeof (*args);
 236                 return 0;
 237         }
 238
 239         if ((mp->mnt_flag & MNT_RDONLY) == 0)
 240                 return (EROFS);
 241
 242         if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL)
 243                 return EINVAL;
 244
 245         /*
 246          * Not an update, or updating the name: look up the name
 247          * and verify that it refers to a sensible block device.
 248          */
 249         error = namei_simple_user(args->fspec,
 250                                 NSM_FOLLOW_NOEMULROOT, &devvp);
 251         if (error != 0)
 252                 return (error);
 253
 254         if (devvp->v_type != VBLK) {
 255                 vrele(devvp);
 256                 return ENOTBLK;
 257         }
 258         if (bdevsw_lookup(devvp->v_rdev) == NULL) {
 259                 vrele(devvp);
 260                 return ENXIO;
 261         }
 262         /*
 263          * If mount by non-root, then verify that user has necessary
 264          * permissions on the device.
 265          */
 266         vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
 267         error = genfs_can_mount(devvp, VREAD, l->l_cred);
 268         VOP_UNLOCK(devvp, 0);
 269         if (error) {
 270                 vrele(devvp);
 271                 return (error);
 272         }
 273         if ((mp->mnt_flag & MNT_UPDATE) == 0) {
 274                 error = VOP_OPEN(devvp, FREAD, FSCRED);
 275                 if (error)
 276                         goto fail;
 277                 error = iso_mountfs(devvp, mp, l, args);
 278                 if (error) {
 279                         vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
 280                         (void)VOP_CLOSE(devvp, FREAD, NOCRED);
 281                         VOP_UNLOCK(devvp, 0);
 282                         goto fail;
 283                 }
 284         } else {
 285                 vrele(devvp);
 286                 if (devvp != imp->im_devvp &&
 287                     devvp->v_rdev != imp->im_devvp->v_rdev)
 288                         return (EINVAL);        /* needs translation */
 289         }
 290         return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE,
 291             mp->mnt_op->vfs_name, mp, l);
 292
 293 fail:
 294         vrele(devvp);
 295         return (error);
 296 }
 297
 298 /*
 299  * Make a mount point from a volume descriptor
 300  */
 301 static int
 302 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len)
 303 {
 304         struct iso_primary_descriptor *pri;
 305         int logical_block_size;
 306         struct iso_directory_record *rootp;
 307
 308         pri = (struct iso_primary_descriptor *)bp->b_data;
 309
 310         logical_block_size = isonum_723 (pri->logical_block_size);
 311
 312         if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
 313             || (logical_block_size & (logical_block_size - 1)) != 0)
 314                 return -1;
 315
 316         rootp = (struct iso_directory_record *)pri->root_directory_record;
 317
 318         isomp->logical_block_size = logical_block_size;
 319         isomp->volume_space_size = isonum_733 (pri->volume_space_size);
 320         memcpy(isomp->root, rootp, sizeof(isomp->root));
 321         isomp->root_extent = isonum_733 (rootp->extent);
 322         isomp->root_size = isonum_733 (rootp->size);
 323         isomp->im_joliet_level = 0;
 324
 325         isomp->im_bmask = logical_block_size - 1;
 326         isomp->im_bshift = 0;
 327         while ((1 << isomp->im_bshift) < isomp->logical_block_size)
 328                 isomp->im_bshift++;
 329
 330         if (ea_len != NULL)
 331                 *ea_len = isonum_711(rootp->ext_attr_length);
 332
 333         return 0;
 334 }
 335
 336 /*
 337  * Common code for mount and mountroot
 338  */
 339 static int
 340 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l,
 341         struct iso_args *argp)
 342 {
 343         struct iso_mnt *isomp = (struct iso_mnt *)0;
 344         struct buf *bp = NULL, *pribp = NULL, *supbp = NULL;
 345         dev_t dev = devvp->v_rdev;
 346         int error = EINVAL;
 347         int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
 348         int iso_bsize;
 349         int iso_blknum;
 350         int joliet_level;
 351         struct iso_volume_descriptor *vdp;
 352         struct iso_supplementary_descriptor *sup;
 353         int sess = 0;
 354         int ext_attr_length;
 355         struct disklabel label;
 356
 357         if (!ronly)
 358                 return EROFS;
 359
 360         /* Flush out any old buffers remaining from a previous use. */
 361         if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0)
 362                 return (error);
 363
 364         /* This is the "logical sector size".  The standard says this
 365          * should be 2048 or the physical sector size on the device,
 366          * whichever is greater.  For now, we'll just use a constant.
 367          */
 368         iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
 369
 370         error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED);
 371         if (!error &&
 372             label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) {
 373                 /* XXX more sanity checks? */
 374                 sess = label.d_partitions[DISKPART(dev)].p_cdsession;
 375         } else {
 376                 /* fallback to old method */
 377                 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED);
 378                 if (error)
 379                         sess = 0;       /* never mind */
 380         }
 381 #ifdef ISO_DEBUG
 382         printf("isofs: session offset (part %"PRId32") %d\n", DISKPART(dev), sess);
 383 #endif
 384
 385         for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
 386                 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize),
 387                                    iso_bsize, NOCRED, 0, &bp)) != 0)
 388                         goto out;
 389
 390                 vdp = (struct iso_volume_descriptor *)bp->b_data;
 391                 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) {
 392                         error = EINVAL;
 393                         goto out;
 394                 }
 395
 396                 switch (isonum_711(vdp->type)) {
 397                 case ISO_VD_PRIMARY:
 398                         if (pribp == NULL) {
 399                                 pribp = bp;
 400                                 bp = NULL;
 401                         }
 402                         break;
 403
 404                 case ISO_VD_SUPPLEMENTARY:
 405                         if (supbp == NULL) {
 406                                 supbp = bp;
 407                                 bp = NULL;
 408                         }
 409                         break;
 410
 411                 default:
 412                         break;
 413                 }
 414
 415                 if (isonum_711 (vdp->type) == ISO_VD_END) {
 416                         brelse(bp, 0);
 417                         bp = NULL;
 418                         break;
 419                 }
 420
 421                 if (bp != NULL) {
 422                         brelse(bp, 0);
 423                         bp = NULL;
 424                 }
 425         }
 426
 427         if (pribp == NULL) {
 428                 error = EINVAL;
 429                 goto out;
 430         }
 431
 432         isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK);
 433         memset(isomp, 0, sizeof *isomp);
 434         if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) {
 435                 error = EINVAL;
 436                 goto out;
 437         }
 438
 439         isomp->volume_space_size += sess;
 440
 441         brelse(pribp, BC_AGE);
 442         pribp = NULL;
 443
 444         mp->mnt_data = isomp;
 445         mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev;
 446         mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660);
 447         mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
 448         mp->mnt_stat.f_namemax = MAXNAMLEN;
 449         mp->mnt_flag |= MNT_LOCAL;
 450         mp->mnt_iflag |= IMNT_MPSAFE;
 451         mp->mnt_dev_bshift = iso_bsize;
 452         mp->mnt_fs_bshift = isomp->im_bshift;
 453         isomp->im_mountp = mp;
 454         isomp->im_dev = dev;
 455         isomp->im_devvp = devvp;
 456
 457         /* Check the Rock Ridge Extension support */
 458         if (!(argp->flags & ISOFSMNT_NORRIP)) {
 459                 struct iso_directory_record *rootp;
 460
 461                 if ((error = bread(isomp->im_devvp,
 462                                    (isomp->root_extent + ext_attr_length) <<
 463                                    (isomp->im_bshift - DEV_BSHIFT),
 464                                    isomp->logical_block_size, NOCRED,
 465                                    0, &bp)) != 0)
 466                     goto out;
 467
 468                 rootp = (struct iso_directory_record *)bp->b_data;
 469
 470                 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
 471                     argp->flags  |= ISOFSMNT_NORRIP;
 472                 } else {
 473                     argp->flags  &= ~ISOFSMNT_GENS;
 474                 }
 475
 476                 /*
 477                  * The contents are valid,
 478                  * but they will get reread as part of another vnode, so...
 479                  */
 480                 brelse(bp, BC_AGE);
 481                 bp = NULL;
 482         }
 483         isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
 484                  ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS);
 485
 486         if (isomp->im_flags & ISOFSMNT_GENS)
 487                 isomp->iso_ftype = ISO_FTYPE_9660;
 488         else if (isomp->im_flags & ISOFSMNT_NORRIP) {
 489                 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
 490                 if (argp->flags & ISOFSMNT_NOCASETRANS)
 491                         isomp->im_flags |= ISOFSMNT_NOCASETRANS;
 492         } else
 493                 isomp->iso_ftype = ISO_FTYPE_RRIP;
 494
 495         /* Check the Joliet Extension support */
 496         if ((argp->flags & ISOFSMNT_NORRIP) != 0 &&
 497             (argp->flags & ISOFSMNT_NOJOLIET) == 0 &&
 498             supbp != NULL) {
 499                 joliet_level = 0;
 500                 sup = (struct iso_supplementary_descriptor *)supbp->b_data;
 501
 502                 if ((isonum_711(sup->flags) & 1) == 0) {
 503                         if (memcmp(sup->escape, "%/@", 3) == 0)
 504                                 joliet_level = 1;
 505                         if (memcmp(sup->escape, "%/C", 3) == 0)
 506                                 joliet_level = 2;
 507                         if (memcmp(sup->escape, "%/E", 3) == 0)
 508                                 joliet_level = 3;
 509                 }
 510                 if (joliet_level != 0) {
 511                         if (iso_makemp(isomp, supbp, NULL) == -1) {
 512                                 error = EINVAL;
 513                                 goto out;
 514                         }
 515                         isomp->im_joliet_level = joliet_level;
 516                 }
 517         }
 518
 519         if (supbp != NULL) {
 520                 brelse(supbp, 0);
 521                 supbp = NULL;
 522         }
 523
 524         devvp->v_specmountpoint = mp;
 525
 526         return 0;
 527 out:
 528         if (bp)
 529                 brelse(bp, 0);
 530         if (pribp)
 531                 brelse(pribp, 0);
 532         if (supbp)
 533                 brelse(supbp, 0);
 534         if (isomp) {
 535                 free(isomp, M_ISOFSMNT);
 536                 mp->mnt_data = NULL;
 537         }
 538         return error;
 539 }
 540
 541 /*
 542  * Make a filesystem operational.
 543  * Nothing to do at the moment.
 544  */
 545 /* ARGSUSED */
 546 int
 547 cd9660_start(struct mount *mp, int flags)
 548 {
 549         return 0;
 550 }
 551
 552 /*
 553  * unmount system call
 554  */
 555 int
 556 cd9660_unmount(struct mount *mp, int mntflags)
 557 {
 558         struct iso_mnt *isomp;
 559         int error, flags = 0;
 560
 561         if (mntflags & MNT_FORCE)
 562                 flags |= FORCECLOSE;
 563         if ((error = vflush(mp, NULLVP, flags)) != 0)
 564                 return (error);
 565
 566         isomp = VFSTOISOFS(mp);
 567
 568         if (isomp->im_devvp->v_type != VBAD)
 569                 isomp->im_devvp->v_specmountpoint = NULL;
 570
 571         vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY);
 572         error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED);
 573         vput(isomp->im_devvp);
 574         free(isomp, M_ISOFSMNT);
 575         mp->mnt_data = NULL;
 576         mp->mnt_flag &= ~MNT_LOCAL;
 577         return (error);
 578 }
 579
 580 /*
 581  * Return root of a filesystem
 582  */
 583 int
 584 cd9660_root(struct mount *mp, struct vnode **vpp)
 585 {
 586         struct iso_mnt *imp = VFSTOISOFS(mp);
 587         struct iso_directory_record *dp =
 588             (struct iso_directory_record *)imp->root;
 589         ino_t ino = isodirino(dp, imp);
 590
 591         /*
 592          * With RRIP we must use the `.' entry of the root directory.
 593          * Simply tell vget, that it's a relocated directory.
 594          */
 595         return (cd9660_vget_internal(mp, ino, vpp,
 596                                      imp->iso_ftype == ISO_FTYPE_RRIP, dp));
 597 }
 598
 599 /*
 600  * Get file system statistics.
 601  */
 602 int
 603 cd9660_statvfs(struct mount *mp, struct statvfs *sbp)
 604 {
 605         struct iso_mnt *isomp;
 606
 607         isomp = VFSTOISOFS(mp);
 608
 609         sbp->f_bsize = isomp->logical_block_size;
 610         sbp->f_frsize = sbp->f_bsize;
 611         sbp->f_iosize = sbp->f_bsize;   /* XXX */
 612         sbp->f_blocks = isomp->volume_space_size;
 613         sbp->f_bfree = 0; /* total free blocks */
 614         sbp->f_bavail = 0; /* blocks free for non superuser */
 615         sbp->f_bresvd = 0; /* total reserved blocks */
 616         sbp->f_files =  0; /* total files */
 617         sbp->f_ffree = 0; /* free file nodes */
 618         sbp->f_favail = 0; /* free file nodes for non superuser */
 619         sbp->f_fresvd = 0; /* reserved file nodes */
 620         copy_statvfs_info(sbp, mp);
 621         /* Use the first spare for flags: */
 622         sbp->f_spare[0] = isomp->im_flags;
 623         return 0;
 624 }
 625
 626 /* ARGSUSED */
 627 int
 628 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
 629 {
 630         return 0;
 631 }
 632
 633 /*
 634  * File handle to vnode
 635  *
 636  * Have to be really careful about stale file handles:
 637  * - check that the inode number is in range
 638  * - call iget() to get the locked inode
 639  * - check for an unallocated inode (i_mode == 0)
 640  * - check that the generation number matches
 641  */
 642
 643 struct ifid {
 644         ushort  ifid_len;
 645         ushort  ifid_pad;
 646         int     ifid_ino;
 647         long    ifid_start;
 648 };
 649
 650 /* ARGSUSED */
 651 int
 652 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
 653 {
 654         struct ifid ifh;
 655         struct iso_node *ip;
 656         struct vnode *nvp;
 657         int error;
 658
 659         if (fhp->fid_len != sizeof(ifh))
 660                 return EINVAL;
 661
 662         memcpy(&ifh, fhp, sizeof(ifh));
 663 #ifdef  ISOFS_DBG
 664         printf("fhtovp: ino %d, start %ld\n",
 665             ifh.ifid_ino, ifh.ifid_start);
 666 #endif
 667
 668         if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) {
 669                 *vpp = NULLVP;
 670                 return (error);
 671         }
 672         ip = VTOI(nvp);
 673         if (ip->inode.iso_mode == 0) {
 674                 vput(nvp);
 675                 *vpp = NULLVP;
 676                 return (ESTALE);
 677         }
 678         *vpp = nvp;
 679         return (0);
 680 }
 681
 682 int
 683 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
 684 {
 685
 686         /*
 687          * XXXX
 688          * It would be nice if we didn't always set the `relocated' flag
 689          * and force the extra read, but I don't want to think about fixing
 690          * that right now.
 691          */
 692         return (cd9660_vget_internal(mp, ino, vpp,
 693 #if 0
 694                                      VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
 695 #else
 696                                      0,
 697 #endif
 698                                      NULL));
 699 }
 700
 701 int
 702 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp,
 703         int relocated, struct iso_directory_record *isodir)
 704 {
 705         struct iso_mnt *imp;
 706         struct iso_node *ip;
 707         struct buf *bp;
 708         struct vnode *vp;
 709         dev_t dev;
 710         int error;
 711
 712         imp = VFSTOISOFS(mp);
 713         dev = imp->im_dev;
 714
 715  retry:
 716         if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP)
 717                 return (0);
 718
 719         /* Allocate a new vnode/iso_node. */
 720         if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) {
 721                 *vpp = NULLVP;
 722                 return (error);
 723         }
 724         ip = pool_get(&cd9660_node_pool, PR_WAITOK);
 725
 726         /*
 727          * If someone beat us to it, put back the freshly allocated
 728          * vnode/inode pair and retry.
 729          */
 730         mutex_enter(&cd9660_hashlock);
 731         if (cd9660_ihashget(dev, ino, 0) != NULL) {
 732                 mutex_exit(&cd9660_hashlock);
 733                 ungetnewvnode(vp);
 734                 pool_put(&cd9660_node_pool, ip);
 735                 goto retry;
 736         }
 737
 738         memset(ip, 0, sizeof(struct iso_node));
 739         vp->v_data = ip;
 740         ip->i_vnode = vp;
 741         ip->i_dev = dev;
 742         ip->i_number = ino;
 743         ip->i_mnt = imp;
 744         ip->i_devvp = imp->im_devvp;
 745         genfs_node_init(vp, &cd9660_genfsops);
 746
 747         /*
 748          * Put it onto its hash chain and lock it so that other requests for
 749          * this inode will block if they arrive while we are sleeping waiting
 750          * for old data structures to be purged or for the contents of the
 751          * disk portion of this inode to be read.
 752          */
 753         cd9660_ihashins(ip);
 754         mutex_exit(&cd9660_hashlock);
 755
 756         if (isodir == 0) {
 757                 int lbn, off;
 758
 759                 lbn = lblkno(imp, ino);
 760                 if (lbn >= imp->volume_space_size) {
 761                         vput(vp);
 762                         printf("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                         vput(vp);
 769                         printf("fhtovp: crosses block boundary %d\n",
 770                             off + ISO_DIRECTORY_RECORD_SIZE);
 771                         return (ESTALE);
 772                 }
 773
 774                 error = bread(imp->im_devvp,
 775                               lbn << (imp->im_bshift - DEV_BSHIFT),
 776                               imp->logical_block_size, NOCRED, 0, &bp);
 777                 if (error) {
 778                         vput(vp);
 779                         brelse(bp, 0);
 780                         printf("fhtovp: bread error %d\n",error);
 781                         return (error);
 782                 }
 783                 isodir = (struct iso_directory_record *)((char *)bp->b_data + off);
 784
 785                 if (off + isonum_711(isodir->length) >
 786                     imp->logical_block_size) {
 787                         vput(vp);
 788                         if (bp != 0)
 789                                 brelse(bp, 0);
 790                         printf("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 != 0)
 800                                 brelse(bp, 0);
 801                         printf("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 = 0;
 809
 810         vref(ip->i_devvp);
 811
 812         if (relocated) {
 813                 /*
 814                  * On relocated directories we must
 815                  * read the `.' entry out of a dir.
 816                  */
 817                 ip->iso_start = ino >> imp->im_bshift;
 818                 if (bp != 0)
 819                         brelse(bp, 0);
 820                 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
 821                         vput(vp);
 822                         return (error);
 823                 }
 824                 isodir = (struct iso_directory_record *)bp->b_data;
 825         }
 826
 827         ip->iso_extent = isonum_733(isodir->extent);
 828         ip->i_size = isonum_733(isodir->size);
 829         ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
 830
 831         /*
 832          * Setup time stamp, attribute
 833          */
 834         vp->v_type = VNON;
 835         switch (imp->iso_ftype) {
 836         default:        /* ISO_FTYPE_9660 */
 837             {
 838                 struct buf *bp2;
 839                 int off;
 840                 if ((imp->im_flags & ISOFSMNT_EXTATT)
 841                     && (off = isonum_711(isodir->ext_attr_length)))
 842                         cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift),
 843                             NULL, &bp2);
 844                 else
 845                         bp2 = NULL;
 846                 cd9660_defattr(isodir, ip, bp2);
 847                 cd9660_deftstamp(isodir, ip, bp2);
 848                 if (bp2)
 849                         brelse(bp2, 0);
 850                 break;
 851             }
 852         case ISO_FTYPE_RRIP:
 853                 cd9660_rrip_analyze(isodir, ip, imp);
 854                 break;
 855         }
 856
 857         if (bp != 0)
 858                 brelse(bp, 0);
 859
 860         /*
 861          * Initialize the associated vnode
 862          */
 863         switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
 864         case VFIFO:
 865                 vp->v_op = cd9660_fifoop_p;
 866                 break;
 867         case VCHR:
 868         case VBLK:
 869                 /*
 870                  * if device, look at device number table for translation
 871                  */
 872                 vp->v_op = cd9660_specop_p;
 873                 spec_node_init(vp, ip->inode.iso_rdev);
 874                 break;
 875         case VLNK:
 876         case VNON:
 877         case VSOCK:
 878         case VDIR:
 879         case VBAD:
 880                 break;
 881         case VREG:
 882                 uvm_vnp_setsize(vp, ip->i_size);
 883                 break;
 884         }
 885
 886         if (vp->v_type != VREG)
 887                 uvm_vnp_setsize(vp, 0);
 888
 889         if (ip->iso_extent == imp->root_extent)
 890                 vp->v_vflag |= VV_ROOT;
 891
 892         /*
 893          * XXX need generation number?
 894          */
 895
 896         *vpp = vp;
 897         return (0);
 898 }
 899
 900 /*
 901  * Vnode pointer to File handle
 902  */
 903 /* ARGSUSED */
 904 int
 905 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size)
 906 {
 907         struct iso_node *ip = VTOI(vp);
 908         struct ifid ifh;
 909
 910         if (*fh_size < sizeof(struct ifid)) {
 911                 *fh_size = sizeof(struct ifid);
 912                 return E2BIG;
 913         }
 914         *fh_size = sizeof(struct ifid);
 915
 916         memset(&ifh, 0, sizeof(ifh));
 917         ifh.ifid_len = sizeof(struct ifid);
 918         ifh.ifid_ino = ip->i_number;
 919         ifh.ifid_start = ip->iso_start;
 920         memcpy(fhp, &ifh, sizeof(ifh));
 921
 922 #ifdef  ISOFS_DBG
 923         printf("vptofh: ino %d, start %ld\n",
 924             ifh.ifid_ino,ifh.ifid_start);
 925 #endif
 926         return 0;
 927 }