sys/fs/filecorefs/filecore_vfsops.c

   1 /*      $NetBSD: filecore_vfsops.c,v 1.60 2009/06/29 05:08:17 dholland Exp $    */
   2
   3 /*-
   4  * Copyright (c) 1994 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      filecore_vfsops.c       1.1     1998/6/26
  32  */
  33
  34 /*-
  35  * Copyright (c) 1998 Andrew McMurry
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. All advertising materials mentioning features or use of this software
  46  *    must display the following acknowledgement:
  47  *      This product includes software developed by the University of
  48  *      California, Berkeley and its contributors.
  49  * 4. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  *
  65  *      filecore_vfsops.c       1.1     1998/6/26
  66  */
  67
  68 #include <sys/cdefs.h>
  69 __KERNEL_RCSID(0, "$NetBSD: filecore_vfsops.c,v 1.60 2009/06/29 05:08:17 dholland Exp $");
  70
  71 #if defined(_KERNEL_OPT)
  72 #include "opt_compat_netbsd.h"
  73 #endif
  74
  75 #include <sys/param.h>
  76 #include <sys/systm.h>
  77 #include <sys/namei.h>
  78 #include <sys/proc.h>
  79 #include <sys/vnode.h>
  80 #include <miscfs/genfs/genfs.h>
  81 #include <miscfs/specfs/specdev.h>
  82 #include <sys/mount.h>
  83 #include <sys/buf.h>
  84 #include <sys/file.h>
  85 #include <sys/device.h>
  86 #include <sys/errno.h>
  87 #include <sys/malloc.h>
  88 #include <sys/pool.h>
  89 #include <sys/conf.h>
  90 #include <sys/sysctl.h>
  91 #include <sys/kauth.h>
  92 #include <sys/module.h>
  93
  94 #include <fs/filecorefs/filecore.h>
  95 #include <fs/filecorefs/filecore_extern.h>
  96 #include <fs/filecorefs/filecore_node.h>
  97 #include <fs/filecorefs/filecore_mount.h>
  98
  99 MODULE(MODULE_CLASS_VFS, filecorefs, NULL);
 100
 101 MALLOC_JUSTDEFINE(M_FILECOREMNT,
 102     "filecore mount", "Filecore FS mount structures");
 103 MALLOC_JUSTDEFINE(M_FILECORETMP,
 104     "filecore temp", "Filecore FS temporary structures");
 105
 106 static struct sysctllog *filecore_sysctl_log;
 107
 108 extern const struct vnodeopv_desc filecore_vnodeop_opv_desc;
 109
 110 const struct vnodeopv_desc * const filecore_vnodeopv_descs[] = {
 111         &filecore_vnodeop_opv_desc,
 112         NULL,
 113 };
 114
 115 struct vfsops filecore_vfsops = {
 116         MOUNT_FILECORE,
 117         sizeof (struct filecore_args),
 118         filecore_mount,
 119         filecore_start,
 120         filecore_unmount,
 121         filecore_root,
 122         (void *)eopnotsupp,             /* vfs_quotactl */
 123         filecore_statvfs,
 124         filecore_sync,
 125         filecore_vget,
 126         filecore_fhtovp,
 127         filecore_vptofh,
 128         filecore_init,
 129         filecore_reinit,
 130         filecore_done,
 131         NULL,                           /* filecore_mountroot */
 132         (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp,
 133         vfs_stdextattrctl,
 134         (void *)eopnotsupp,             /* vfs_suspendctl */
 135         genfs_renamelock_enter,
 136         genfs_renamelock_exit,
 137         (void *)eopnotsupp,
 138         filecore_vnodeopv_descs,
 139         0,
 140         { NULL, NULL }
 141 };
 142
 143 static const struct genfs_ops filecore_genfsops = {
 144         .gop_size = genfs_size,
 145 };
 146
 147 static int
 148 filecorefs_modcmd(modcmd_t cmd, void *arg)
 149 {
 150         int error;
 151
 152         switch (cmd) {
 153         case MODULE_CMD_INIT:
 154                 error = vfs_attach(&filecore_vfsops);
 155                 if (error != 0)
 156                         break;
 157                 sysctl_createv(&filecore_sysctl_log, 0, NULL, NULL,
 158                                CTLFLAG_PERMANENT,
 159                                CTLTYPE_NODE, "vfs", NULL,
 160                                NULL, 0, NULL, 0,
 161                                CTL_VFS, CTL_EOL);
 162                 sysctl_createv(&filecore_sysctl_log, 0, NULL, NULL,
 163                                CTLFLAG_PERMANENT,
 164                                CTLTYPE_NODE, "filecore",
 165                                SYSCTL_DESCR("Acorn FILECORE file system"),
 166                                NULL, 0, NULL, 0,
 167                                CTL_VFS, 19, CTL_EOL);
 168                 /*
 169                  * XXX the "19" above could be dynamic, thereby eliminating
 170                  * one more instance of the "number to vfs" mapping problem,
 171                  * but "19" is the order as taken from sys/mount.h
 172                  */
 173                 break;
 174         case MODULE_CMD_FINI:
 175                 error = vfs_detach(&filecore_vfsops);
 176                 if (error != 0)
 177                         break;
 178                 sysctl_teardown(&filecore_sysctl_log);
 179                 break;
 180         default:
 181                 error = ENOTTY;
 182                 break;
 183         }
 184
 185         return (error);
 186 }
 187
 188 /*
 189  * Called by vfs_mountroot when iso is going to be mounted as root.
 190  *
 191  * Name is updated by mount(8) after booting.
 192  */
 193
 194 static int filecore_mountfs(struct vnode *devvp, struct mount *mp,
 195                 struct lwp *l, struct filecore_args *argp);
 196
 197 #if 0
 198 int
 199 filecore_mountroot(void)
 200 {
 201         struct mount *mp;
 202         extern struct vnode *rootvp;
 203         struct proc *p = curproc;       /* XXX */
 204         int error;
 205         struct filecore_args args;
 206
 207         if (device_class(root_device) != DV_DISK)
 208                 return (ENODEV);
 209
 210         /*
 211          * Get vnodes for swapdev and rootdev.
 212          */
 213         if (bdevvp(rootdev, &rootvp))
 214                 panic("filecore_mountroot: can't setup rootvp");
 215
 216         if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0)
 217                 return (error);
 218
 219         args.flags = FILECOREMNT_ROOT;
 220         if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) {
 221                 vfs_unbusy(mp, false, NULL);
 222                 vfs_destroy(mp);
 223                 return (error);
 224         }
 225         simple_lock(&mountlist_slock);
 226         CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
 227         simple_unlock(&mountlist_slock);
 228         (void)filecore_statvfs(mp, &mp->mnt_stat, p);
 229         vfs_unbusy(mp, false, NULL);
 230         return (0);
 231 }
 232 #endif
 233
 234 /*
 235  * VFS Operations.
 236  *
 237  * mount system call
 238  */
 239 int
 240 filecore_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
 241 {
 242         struct lwp *l = curlwp;
 243         struct vnode *devvp;
 244         struct filecore_args *args = data;
 245         int error;
 246         struct filecore_mnt *fcmp = NULL;
 247
 248         if (*data_len < sizeof *args)
 249                 return EINVAL;
 250
 251         if (mp->mnt_flag & MNT_GETARGS) {
 252                 fcmp = VFSTOFILECORE(mp);
 253                 if (fcmp == NULL)
 254                         return EIO;
 255                 args->flags = fcmp->fc_mntflags;
 256                 args->uid = fcmp->fc_uid;
 257                 args->gid = fcmp->fc_gid;
 258                 args->fspec = NULL;
 259                 *data_len = sizeof *args;
 260                 return 0;
 261         }
 262
 263         if ((mp->mnt_flag & MNT_RDONLY) == 0)
 264                 return (EROFS);
 265
 266         if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL)
 267                 return EINVAL;
 268
 269         /*
 270          * Not an update, or updating the name: look up the name
 271          * and verify that it refers to a sensible block device.
 272          */
 273         error = namei_simple_user(args->fspec,
 274                                 NSM_FOLLOW_NOEMULROOT, &devvp);
 275         if (error != 0)
 276                 return (error);
 277
 278         if (devvp->v_type != VBLK) {
 279                 vrele(devvp);
 280                 return ENOTBLK;
 281         }
 282         if (bdevsw_lookup(devvp->v_rdev) == NULL) {
 283                 vrele(devvp);
 284                 return ENXIO;
 285         }
 286         /*
 287          * If mount by non-root, then verify that user has necessary
 288          * permissions on the device.
 289          */
 290         vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
 291         error = genfs_can_mount(devvp, VREAD, l->l_cred);
 292         VOP_UNLOCK(devvp, 0);
 293         if (error) {
 294                 vrele(devvp);
 295                 return (error);
 296         }
 297         if ((mp->mnt_flag & MNT_UPDATE) == 0)
 298                 error = filecore_mountfs(devvp, mp, l, args);
 299         else {
 300                 if (devvp != fcmp->fc_devvp)
 301                         error = EINVAL; /* needs translation */
 302                 else
 303                         vrele(devvp);
 304         }
 305         if (error) {
 306                 vrele(devvp);
 307                 return error;
 308         }
 309         fcmp = VFSTOFILECORE(mp);
 310         return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE,
 311             mp->mnt_op->vfs_name, mp, l);
 312 }
 313
 314 /*
 315  * Common code for mount and mountroot
 316  */
 317 static int
 318 filecore_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, struct filecore_args *argp)
 319 {
 320         struct filecore_mnt *fcmp = (struct filecore_mnt *)0;
 321         struct buf *bp = NULL;
 322         dev_t dev = devvp->v_rdev;
 323         int error = EINVAL;
 324         int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
 325         struct filecore_disc_record *fcdr;
 326         unsigned map;
 327         unsigned log2secsize;
 328
 329         if (!ronly)
 330                 return EROFS;
 331
 332         if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0)
 333                 return (error);
 334
 335         error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED);
 336         if (error)
 337                 return error;
 338
 339         /* Read the filecore boot block to check FS validity and to find the map */
 340         error = bread(devvp, FILECORE_BOOTBLOCK_BLKN,
 341                            FILECORE_BOOTBLOCK_SIZE, NOCRED, 0, &bp);
 342 #ifdef FILECORE_DEBUG_BR
 343                 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp,
 344                        FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE,
 345                        bp, error);
 346 #endif
 347         if (error != 0)
 348                 goto out;
 349
 350         KASSERT(bp != NULL);
 351         if (filecore_bbchecksum(bp->b_data) != 0) {
 352                 error = EINVAL;
 353                 goto out;
 354         }
 355         fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) +
 356             FILECORE_BB_DISCREC);
 357         map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare)
 358             * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE)
 359             << fcdr->log2bpmb) >> fcdr->log2secsize;
 360         log2secsize = fcdr->log2secsize;
 361 #ifdef FILECORE_DEBUG_BR
 362         printf("brelse(%p) vf1\n", bp);
 363 #endif
 364         brelse(bp, BC_AGE);
 365         bp = NULL;
 366
 367         /* Read the bootblock in the map */
 368         error = bread(devvp, map, 1 << log2secsize, NOCRED, 0, &bp);
 369 #ifdef FILECORE_DEBUG_BR
 370                 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp,
 371                        map, 1 << log2secsize, bp, error);
 372 #endif
 373         if (error != 0)
 374                 goto out;
 375         fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 4);
 376         fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK);
 377         memset(fcmp, 0, sizeof *fcmp);
 378         if (fcdr->log2bpmb > fcdr->log2secsize)
 379                 fcmp->log2bsize = fcdr->log2bpmb;
 380         else    fcmp->log2bsize = fcdr->log2secsize;
 381         fcmp->blksize = 1 << fcmp->log2bsize;
 382         memcpy(&fcmp->drec, fcdr, sizeof(*fcdr));
 383         fcmp->map = map;
 384         fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare)
 385             / (fcdr->idlen + 1);
 386         fcmp->mask = (1 << fcdr->idlen) - 1;
 387         if (fcdr->big_flag & 1) {
 388                 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32)
 389                     + fcdr->disc_size) / fcmp->blksize;
 390         } else {
 391                 fcmp->nblks=fcdr->disc_size / fcmp->blksize;
 392         }
 393
 394 #ifdef FILECORE_DEBUG_BR
 395         printf("brelse(%p) vf2\n", bp);
 396 #endif
 397         brelse(bp, BC_AGE);
 398         bp = NULL;
 399
 400         mp->mnt_data = fcmp;
 401         mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev;
 402         mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE);
 403         mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
 404         mp->mnt_stat.f_namemax = 10;
 405         mp->mnt_flag |= MNT_LOCAL;
 406         mp->mnt_dev_bshift = fcdr->log2secsize;
 407         mp->mnt_fs_bshift = fcmp->log2bsize;
 408
 409         fcmp->fc_mountp = mp;
 410         fcmp->fc_dev = dev;
 411         fcmp->fc_devvp = devvp;
 412         fcmp->fc_mntflags = argp->flags;
 413         if (argp->flags & FILECOREMNT_USEUID) {
 414                 fcmp->fc_uid = kauth_cred_getuid(l->l_cred);
 415                 fcmp->fc_gid = kauth_cred_getgid(l->l_cred);
 416         } else {
 417                 fcmp->fc_uid = argp->uid;
 418                 fcmp->fc_gid = argp->gid;
 419         }
 420
 421         return 0;
 422 out:
 423         if (bp) {
 424 #ifdef FILECORE_DEBUG_BR
 425                 printf("brelse(%p) vf3\n", bp);
 426 #endif
 427                 brelse(bp, 0);
 428         }
 429         vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
 430         (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED);
 431         VOP_UNLOCK(devvp, 0);
 432         return error;
 433 }
 434
 435 /*
 436  * Make a filesystem operational.
 437  * Nothing to do at the moment.
 438  */
 439 /* ARGSUSED */
 440 int
 441 filecore_start(struct mount *mp, int flags)
 442 {
 443         return 0;
 444 }
 445
 446 /*
 447  * unmount system call
 448  */
 449 int
 450 filecore_unmount(struct mount *mp, int mntflags)
 451 {
 452         struct filecore_mnt *fcmp;
 453         int error, flags = 0;
 454
 455         if (mntflags & MNT_FORCE)
 456                 flags |= FORCECLOSE;
 457         if ((error = vflush(mp, NULLVP, flags)) != 0)
 458                 return (error);
 459
 460         fcmp = VFSTOFILECORE(mp);
 461
 462         if (fcmp->fc_devvp->v_type != VBAD)
 463                 fcmp->fc_devvp->v_specmountpoint = NULL;
 464         vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY);
 465         error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED);
 466         vput(fcmp->fc_devvp);
 467         free(fcmp, M_FILECOREMNT);
 468         mp->mnt_data = NULL;
 469         mp->mnt_flag &= ~MNT_LOCAL;
 470         return (error);
 471 }
 472
 473 /*
 474  * Return root of a filesystem
 475  */
 476 int
 477 filecore_root(struct mount *mp, struct vnode **vpp)
 478 {
 479         struct vnode *nvp;
 480         int error;
 481
 482         if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0)
 483                 return (error);
 484         *vpp = nvp;
 485         return (0);
 486 }
 487
 488 /*
 489  * Get file system statistics.
 490  */
 491 int
 492 filecore_statvfs(struct mount *mp, struct statvfs *sbp)
 493 {
 494         struct filecore_mnt *fcmp = VFSTOFILECORE(mp);
 495
 496         sbp->f_bsize = fcmp->blksize;
 497         sbp->f_frsize = sbp->f_bsize; /* XXX */
 498         sbp->f_iosize = sbp->f_bsize;   /* XXX */
 499         sbp->f_blocks = fcmp->nblks;
 500         sbp->f_bfree = 0; /* total free blocks */
 501         sbp->f_bavail = 0; /* blocks free for non superuser */
 502         sbp->f_bresvd = 0; /* reserved blocks */
 503         sbp->f_files =  0; /* total files */
 504         sbp->f_ffree = 0; /* free file nodes for non superuser */
 505         sbp->f_favail = 0; /* free file nodes */
 506         sbp->f_fresvd = 0; /* reserved file nodes */
 507         copy_statvfs_info(sbp, mp);
 508         return 0;
 509 }
 510
 511 /* ARGSUSED */
 512 int
 513 filecore_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
 514 {
 515         return (0);
 516 }
 517
 518 /*
 519  * File handle to vnode
 520  *
 521  * Have to be really careful about stale file handles:
 522  * - check that the inode number is in range
 523  * - call iget() to get the locked inode
 524  * - check for an unallocated inode (i_mode == 0)
 525  * - check that the generation number matches
 526  */
 527
 528 struct ifid {
 529         ushort          ifid_len;
 530         ushort          ifid_pad;
 531         u_int32_t       ifid_ino;
 532 };
 533
 534 /* ARGSUSED */
 535 int
 536 filecore_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
 537 {
 538         struct ifid ifh;
 539         struct vnode *nvp;
 540         struct filecore_node *ip;
 541         int error;
 542
 543         if (fhp->fid_len != sizeof(struct ifid))
 544                 return EINVAL;
 545
 546         memcpy(&ifh, fhp, sizeof(ifh));
 547         if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) {
 548                 *vpp = NULLVP;
 549                 return (error);
 550         }
 551         ip = VTOI(nvp);
 552         if (filecore_staleinode(ip)) {
 553                 vput(nvp);
 554                 *vpp = NULLVP;
 555                 return (ESTALE);
 556         }
 557         *vpp = nvp;
 558         return (0);
 559 }
 560
 561 /* This looks complicated. Look at other vgets as well as the iso9660 one.
 562  *
 563  * The filecore inode number is made up of 1 byte directory entry index and
 564  * 3 bytes of the internal disc address of the directory. On a read-only
 565  * filesystem this is unique. For a read-write version we may not be able to
 566  * do vget, see msdosfs.
 567  */
 568
 569 int
 570 filecore_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
 571 {
 572         struct filecore_mnt *fcmp;
 573         struct filecore_node *ip;
 574         struct buf *bp;
 575         struct vnode *vp;
 576         dev_t dev;
 577         int error;
 578
 579         fcmp = VFSTOFILECORE(mp);
 580         dev = fcmp->fc_dev;
 581         if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP)
 582                 return (0);
 583
 584         /* Allocate a new vnode/filecore_node. */
 585         if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp))
 586             != 0) {
 587                 *vpp = NULLVP;
 588                 return (error);
 589         }
 590         ip = pool_get(&filecore_node_pool, PR_WAITOK);
 591         memset(ip, 0, sizeof(struct filecore_node));
 592         vp->v_data = ip;
 593         ip->i_vnode = vp;
 594         ip->i_dev = dev;
 595         ip->i_number = ino;
 596         ip->i_block = -1;
 597         ip->i_parent = -2;
 598         genfs_node_init(vp, &filecore_genfsops);
 599
 600         /*
 601          * Put it onto its hash chain and lock it so that other requests for
 602          * this inode will block if they arrive while we are sleeping waiting
 603          * for old data structures to be purged or for the contents of the
 604          * disk portion of this inode to be read.
 605          */
 606         filecore_ihashins(ip);
 607
 608         if (ino == FILECORE_ROOTINO) {
 609                 /* Here we need to construct a root directory inode */
 610                 memcpy(ip->i_dirent.name, "root", 4);
 611                 ip->i_dirent.load = 0;
 612                 ip->i_dirent.exec = 0;
 613                 ip->i_dirent.len = FILECORE_DIR_SIZE;
 614                 ip->i_dirent.addr = fcmp->drec.root;
 615                 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ;
 616
 617         } else {
 618                 /* Read in Data from Directory Entry */
 619                 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK,
 620                     FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) {
 621                         vput(vp);
 622 #ifdef FILECORE_DEBUG_BR
 623                         printf("brelse(%p) vf4\n", bp);
 624 #endif
 625                         brelse(bp, 0);
 626                         *vpp = NULL;
 627                         return (error);
 628                 }
 629
 630                 memcpy(&ip->i_dirent,
 631                     fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX),
 632                     sizeof(struct filecore_direntry));
 633 #ifdef FILECORE_DEBUG_BR
 634                 printf("brelse(%p) vf5\n", bp);
 635 #endif
 636                 brelse(bp, 0);
 637         }
 638
 639         ip->i_mnt = fcmp;
 640         ip->i_devvp = fcmp->fc_devvp;
 641         ip->i_diroff = 0;
 642         vref(ip->i_devvp);
 643
 644         /*
 645          * Setup type
 646          */
 647         vp->v_type = VREG;
 648         if (ip->i_dirent.attr & FILECORE_ATTR_DIR)
 649                 vp->v_type = VDIR;
 650
 651         /*
 652          * Initialize the associated vnode
 653          */
 654         switch (vp->v_type) {
 655         case VFIFO:
 656         case VCHR:
 657         case VBLK:
 658                 /*
 659                  * Devices not supported.
 660                  */
 661                 vput(vp);
 662                 return (EOPNOTSUPP);
 663         case VLNK:
 664         case VNON:
 665         case VSOCK:
 666         case VDIR:
 667         case VBAD:
 668         case VREG:
 669                 break;
 670         }
 671
 672         if (ino == FILECORE_ROOTINO)
 673                 vp->v_vflag |= VV_ROOT;
 674
 675         /*
 676          * XXX need generation number?
 677          */
 678
 679         uvm_vnp_setsize(vp, ip->i_size);
 680         *vpp = vp;
 681         return (0);
 682 }
 683
 684 /*
 685  * Vnode pointer to File handle
 686  */
 687 /* ARGSUSED */
 688 int
 689 filecore_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size)
 690 {
 691         struct filecore_node *ip = VTOI(vp);
 692         struct ifid ifh;
 693
 694         if (*fh_size < sizeof(struct ifid)) {
 695                 *fh_size = sizeof(struct ifid);
 696                 return E2BIG;
 697         }
 698         memset(&ifh, 0, sizeof(ifh));
 699         ifh.ifid_len = sizeof(struct ifid);
 700         ifh.ifid_ino = ip->i_number;
 701         memcpy(fhp, &ifh, sizeof(ifh));
 702         return 0;
 703 }