1 /* $NetBSD: rump_tmpfs.c,v 1.4 2009/12/17 14:06:38 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2008 Antti Kantee. All Rights Reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/types.h> 29 #include <sys/mount.h> 30 31 #include <fs/tmpfs/tmpfs_args.h> 32 33 #include <err.h> 34 #include <puffs.h> 35 #include <stdlib.h> 36 #include <unistd.h> 37 38 #include <rump/p2k.h> 39 40 #include "mount_tmpfs.h" 41 42 /* 43 * tmpfs has a slight "issue" with file content storage. Since it 44 * stores data in memory, we will end up using 2x the RAM for 45 * storage if we cache in puffs vfs. If we don't, we need to take 46 * the slow path from the kernel to the file server every time the 47 * file is accessed. It's either suck or suck. However, rump_tmpfs 48 * will not be used in real life, so this is hardly a release-stopping 49 * issue of catastrophic proportions. For now we opt for un-double 50 * storage (PUFFS_KFLAG_NOCACHE_PAGE). 51 */ 52 53 int 54 main(int argc, char *argv[]) 55 { 56 struct tmpfs_args args; 57 char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN]; 58 int mntflags; 59 int rv; 60 61 setprogname(argv[0]); 62 63 mount_tmpfs_parseargs(argc, argv, &args, &mntflags, 64 canon_dev, canon_dir); 65 rv = p2k_run_fs(MOUNT_TMPFS, canon_dev, canon_dir, mntflags, 66 &args, sizeof(args), PUFFS_KFLAG_NOCACHE_PAGE); 67 if (rv) 68 err(1, "mount"); 69 70 return 0; 71 } 72