132 lines
3.4 KiB
C
132 lines
3.4 KiB
C
/* $NetBSD: rump_nqmfs.c,v 1.3 2010/03/31 14:54:07 pooka Exp $ */
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/*
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* Copyright (c) 2010 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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* Not Quite MFS. Instead of allocating memory and creating a FFS file system
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* there, mmap a file (which should contain ffs) and use that as the backend.
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* You can also give a newly created image as the file ...
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*/
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <ufs/ufs/ufsmount.h>
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#include <err.h>
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#include <mntopts.h>
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#include <puffs.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <rump/p2k.h>
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#include <rump/ukfs.h>
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const struct mntopt mopts[] = {
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MOPT_STDOPTS,
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MOPT_NULL,
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};
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static void
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usage(void)
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{
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fprintf(stderr, "%s: [-o args] fspec mountpoint\n", getprogname());
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exit(1);
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}
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static struct mfs_args args;
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static char *mntpath, *mntfile;
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static int mntflags, altflags;
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int
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main(int argc, char *argv[])
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{
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struct stat sb;
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mntoptparse_t mp;
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void *membase;
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int ch, fd, rdonly, shared;
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setprogname(argv[0]);
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puffs_unmountonsignal(SIGINT, true);
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puffs_unmountonsignal(SIGTERM, true);
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shared = mntflags = altflags = 0;
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memset(&args, 0, sizeof(args));
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while ((ch = getopt(argc, argv, "o:s")) != -1) {
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switch (ch) {
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case 'o':
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mp = getmntopts(optarg, mopts, &mntflags, &altflags);
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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 's':
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shared = 1;
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break;
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default:
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usage();
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break;
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}
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}
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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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mntfile = argv[0];
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mntpath = argv[1];
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rdonly = mntflags & MNT_RDONLY;
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if (stat(mntfile, &sb) == -1)
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err(1, "stat fspec");
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if (!S_ISREG(sb.st_mode))
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errx(1, "fspec must be a regular file");
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fd = open(mntfile, rdonly ? O_RDONLY: O_RDWR);
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if (fd == -1)
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err(1, "open fspec");
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membase = mmap(NULL, sb.st_size, PROT_READ | (rdonly ? 0 : PROT_WRITE),
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MAP_FILE | (shared ? MAP_SHARED : MAP_PRIVATE), fd, 0);
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if (membase == MAP_FAILED)
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err(1, "cannot mmap fspec");
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args.fspec = mntfile;
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args.base = membase;
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args.size = sb.st_size;
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if (p2k_run_fs(MOUNT_MFS, "/swabbie", mntpath,
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0, &args, sizeof(args), 0) == -1)
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err(1, "p2k");
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return 0;
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}
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