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      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