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rump_syspuffs.c revision 1.3 
      1 /*	$NetBSD: rump_syspuffs.c,v 1.3 2008/08/11 13:32:55 pooka Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2008 Antti Kantee.  All Rights Reserved.
      5  *
      6  * Development of this software was supported by the
      7  * Research Foundation of Helsinki University of Technology
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     19  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     21  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28  * SUCH DAMAGE.
     29  */
     30 
     31 #include <sys/types.h>
     32 #include <sys/mount.h>
     33 #include <sys/socket.h>
     34 #include <sys/syslimits.h>
     35 
     36 #include <assert.h>
     37 #include <err.h>
     38 #include <paths.h>
     39 #include <puffs.h>
     40 #include <stdio.h>
     41 #include <stdlib.h>
     42 #include <unistd.h>
     43 
     44 #include <rump/p2k.h>
     45 
     46 #include "puffs_rumpglue.h"
     47 
     48 static void
     49 usage(void)
     50 {
     51 
     52 	errx(1, "usage: %s file_server fs_opts", getprogname());
     53 }
     54 
     55 static void
     56 trapchild(int sig)
     57 {
     58 
     59 	/* XXX: yaya, not reentrant */
     60 	errx(1, "child died");
     61 }
     62 
     63 int
     64 main(int argc, char *argv[])
     65 {
     66 	struct puffs_kargs kargs;
     67 	char *mntpath, *fromname;
     68 	size_t len;
     69 	char comfd[16];
     70 	int sv[2];
     71 	int mntflags, pflags, rv;
     72 
     73 #if 1
     74 	extern int puffsdebug;
     75 	extern int putterdebug;
     76 
     77 	puffsdebug = putterdebug = 1;
     78 #endif
     79 
     80 	setprogname(argv[0]);
     81 
     82 	if (argc < 2)
     83 		usage();
     84 
     85 	/* Create sucketpair for communication with the real file server */
     86 	if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sv) == -1)
     87 		err(1, "socketpair");
     88 
     89 	signal(SIGCHLD, trapchild);
     90 
     91 	switch (fork()) {
     92 	case 0:
     93 		snprintf(comfd, sizeof(sv[0]), "%d", sv[0]);
     94 		if (setenv("PUFFS_COMFD", comfd, 1) == -1)
     95 			err(1, "setenv");
     96 
     97 		argv++;
     98 		if (execvp(argv[0], argv) == -1)
     99 			err(1, "execvp");
    100 		/*NOTREACHED*/
    101 	case -1:
    102 		err(1, "fork");
    103 		/*NOTREACHED*/
    104 	default:
    105 		break;
    106 	}
    107 
    108 	/* read args */
    109 	if (read(sv[1], &len, sizeof(len)) != sizeof(len))
    110 		err(1, "mp 1");
    111 	mntpath = malloc(len);
    112 	if (mntpath == NULL)
    113 		err(1, "malloc %zu", len);
    114 	if (read(sv[1], mntpath, len) != len)
    115 		err(1, "mp 2");
    116 	if (read(sv[1], &len, sizeof(len)) != sizeof(len))
    117 		err(1, "fn 1");
    118 	fromname = malloc(len);
    119 	if (fromname == NULL)
    120 		err(1, "malloc %zu", len);
    121 	if (read(sv[1], fromname, len) != len)
    122 		err(1, "fn 2");
    123 	if (read(sv[1], &mntflags, sizeof(mntflags)) != sizeof(mntflags))
    124 		err(1, "mntflags");
    125 	if (read(sv[1], &kargs, sizeof(kargs)) != sizeof(kargs))
    126 		err(1, "puffs_args");
    127 	if (read(sv[1], &pflags, sizeof(pflags)) != sizeof(pflags))
    128 		err(1, "pflags");
    129 
    130 	signal(SIGCHLD, SIG_DFL);
    131 
    132 	/* XXX: some adjustments */
    133 	pflags |= PUFFS_KFLAG_NOCACHE;
    134 	pflags &= ~PUFFS_FLAG_BUILDPATH;
    135 
    136 	rv = puffs_rumpglue_init(sv[1], &kargs.pa_fd);
    137 	assert(rv == 0);
    138 	rv = p2k_run_fs(MOUNT_PUFFS, fromname, mntpath, mntflags,
    139 		&kargs, sizeof(kargs), pflags);
    140 	if (rv)
    141 		err(1, "mount");
    142 
    143 	return 0;
    144 }
    145