256 lines
6.3 KiB
C
256 lines
6.3 KiB
C
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/* $NetBSD: dtfs.c,v 1.2 2010/07/21 06:58:25 pooka Exp $ */
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/*
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* Copyright (c) 2006 Antti Kantee. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Delectable Test File System: a simple in-memory file system which
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* demonstrates the use of puffs.
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* (a.k.a. Detrempe FS ...)
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*/
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#include <sys/types.h>
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#include <err.h>
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#include <mntopts.h>
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#include <paths.h>
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#include <puffs.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "dtfs.h"
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#ifdef DEEP_ROOTED_CLUE
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#define FSNAME "detrempe"
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#else
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#define FSNAME "dt"
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#endif
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#define MAXREQMAGIC -37
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static struct puffs_usermount *gpu;
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static struct dtfs_mount gdtm;
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int dynamicfh;
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int straightflush;
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static void usage(void);
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static void
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usage()
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{
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fprintf(stderr, "usage: %s [-bsdftl] [-c hashbuckets] [-m maxreqsize] "
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"[-n typename]\n [-o mntopt] [-o puffsopt] [-p prot] "
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"[-r rootnodetype]\n detrempe /mountpoint\n", getprogname());
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exit(1);
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}
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static void
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wipe_the_sleep_out_of_my_eyes(int v)
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{
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gdtm.dtm_needwakeup++;
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}
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static void
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loopfun(struct puffs_usermount *pu)
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{
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struct dtfs_mount *dtm = puffs_getspecific(pu);
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struct dtfs_poll *dp;
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while (dtm->dtm_needwakeup) {
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dtm->dtm_needwakeup--;
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dp = LIST_FIRST(&dtm->dtm_pollent);
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if (dp == NULL)
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return;
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LIST_REMOVE(dp, dp_entries);
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puffs_cc_continue(dp->dp_pcc);
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}
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}
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int
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main(int argc, char *argv[])
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{
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extern char *optarg;
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extern int optind;
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struct puffs_usermount *pu;
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struct puffs_pathobj *po_root;
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struct puffs_ops *pops;
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struct timespec ts;
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const char *typename;
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char *rtstr;
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mntoptparse_t mp;
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int pflags, detach, mntflags;
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int ch;
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int khashbuckets;
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int maxreqsize;
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setprogname(argv[0]);
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rtstr = NULL;
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detach = 1;
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mntflags = 0;
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khashbuckets = 256;
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pflags = PUFFS_KFLAG_IAONDEMAND;
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typename = FSNAME;
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maxreqsize = MAXREQMAGIC;
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gdtm.dtm_allowprot = VM_PROT_ALL;
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while ((ch = getopt(argc, argv, "bc:dfilm:n:o:p:r:st")) != -1) {
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switch (ch) {
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case 'b': /* build paths, for debugging the feature */
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pflags |= PUFFS_FLAG_BUILDPATH;
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break;
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case 'c':
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khashbuckets = atoi(optarg);
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break;
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case 'd':
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dynamicfh = 1;
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break;
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case 'f':
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pflags |= PUFFS_KFLAG_LOOKUP_FULLPNBUF;
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break;
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case 'i':
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pflags &= ~PUFFS_KFLAG_IAONDEMAND;
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break;
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case 'l':
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straightflush = 1;
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break;
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case 'm':
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maxreqsize = atoi(optarg);
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break;
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case 'n':
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typename = optarg;
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break;
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case 'o':
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mp = getmntopts(optarg, puffsmopts, &mntflags, &pflags);
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if (mp == NULL)
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err(1, "getmntopts");
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freemntopts(mp);
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break;
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case 'p':
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gdtm.dtm_allowprot = atoi(optarg);
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if ((gdtm.dtm_allowprot | VM_PROT_ALL) != VM_PROT_ALL)
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usage();
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break;
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case 'r':
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rtstr = optarg;
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break;
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case 's': /* stay on top */
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detach = 0;
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break;
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case 't':
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pflags |= PUFFS_KFLAG_WTCACHE;
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break;
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default:
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usage();
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/*NOTREACHED*/
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}
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}
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if (pflags & PUFFS_FLAG_OPDUMP)
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detach = 0;
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argc -= optind;
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argv += optind;
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if (argc != 2)
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usage();
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PUFFSOP_INIT(pops);
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PUFFSOP_SET(pops, dtfs, fs, statvfs);
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PUFFSOP_SET(pops, dtfs, fs, unmount);
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PUFFSOP_SETFSNOP(pops, sync);
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PUFFSOP_SET(pops, dtfs, fs, fhtonode);
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PUFFSOP_SET(pops, dtfs, fs, nodetofh);
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PUFFSOP_SET(pops, dtfs, node, lookup);
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PUFFSOP_SET(pops, dtfs, node, access);
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PUFFSOP_SET(pops, puffs_genfs, node, getattr);
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PUFFSOP_SET(pops, dtfs, node, setattr);
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PUFFSOP_SET(pops, dtfs, node, create);
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PUFFSOP_SET(pops, dtfs, node, remove);
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PUFFSOP_SET(pops, dtfs, node, readdir);
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PUFFSOP_SET(pops, dtfs, node, poll);
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PUFFSOP_SET(pops, dtfs, node, mmap);
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PUFFSOP_SET(pops, dtfs, node, mkdir);
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PUFFSOP_SET(pops, dtfs, node, rmdir);
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PUFFSOP_SET(pops, dtfs, node, rename);
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PUFFSOP_SET(pops, dtfs, node, read);
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PUFFSOP_SET(pops, dtfs, node, write);
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PUFFSOP_SET(pops, dtfs, node, link);
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PUFFSOP_SET(pops, dtfs, node, symlink);
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PUFFSOP_SET(pops, dtfs, node, readlink);
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PUFFSOP_SET(pops, dtfs, node, mknod);
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PUFFSOP_SET(pops, dtfs, node, inactive);
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PUFFSOP_SET(pops, dtfs, node, pathconf);
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PUFFSOP_SET(pops, dtfs, node, reclaim);
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srandom(time(NULL)); /* for random generation numbers */
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pu = puffs_init(pops, _PATH_PUFFS, typename, &gdtm, pflags);
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if (pu == NULL)
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err(1, "init");
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gpu = pu;
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puffs_setfhsize(pu, sizeof(struct dtfs_fid),
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PUFFS_FHFLAG_NFSV2 | PUFFS_FHFLAG_NFSV3
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puffs_setncookiehash(pu, khashbuckets);
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if (signal(SIGALRM, wipe_the_sleep_out_of_my_eyes) == SIG_ERR)
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warn("cannot set alarm sighandler");
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/* init */
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if (dtfs_domount(pu, rtstr) != 0)
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errx(1, "dtfs_domount failed");
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po_root = puffs_getrootpathobj(pu);
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po_root->po_path = argv[0];
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po_root->po_len = strlen(argv[0]);
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/* often enough for testing poll */
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ts.tv_sec = 1;
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ts.tv_nsec = 0;
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puffs_ml_setloopfn(pu, loopfun);
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puffs_ml_settimeout(pu, &ts);
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if (maxreqsize != MAXREQMAGIC)
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puffs_setmaxreqlen(pu, maxreqsize);
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puffs_set_errnotify(pu, puffs_kernerr_abort);
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if (detach)
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if (puffs_daemon(pu, 1, 1) == -1)
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err(1, "puffs_daemon");
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if (puffs_mount(pu, argv[1], mntflags, puffs_getroot(pu)) == -1)
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err(1, "mount");
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if (puffs_mainloop(pu) == -1)
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err(1, "mainloop");
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return 0;
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}
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