/*      $NetBSD: rumpnfsd.c,v 1.11 2020/06/17 00:16:21 kamil Exp $      */

/*-
 * Copyright (c) 2010 The NetBSD Foundation, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>

#include <dlfcn.h>
#include <err.h>
#include <errno.h>
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <rpc/rpc.h>

void *mountd_main(void *);
void *rpcbind_main(void *);
int nfsd_main(int, char **);

sem_t gensem;

#define RUMPNFSD_NOATF
#include "../../../net/config/netconfig.c"
#include "../../common/h_fsmacros.h"
#include "svc_fdset.h"

#include <rump/rump.h>
#include <rump/rump_syscallshotgun.h>
#include <rump/rump_syscalls.h>

int
main(int argc, char *argv[])
{
        const char *ethername, *ethername_ro;
        const char *serveraddr, *serveraddr_ro;
        const char *netmask;
        const char *exportpath;
        const char *imagename;
        char ifname[IFNAMSIZ], ifname_ro[IFNAMSIZ];
        void *fsarg;
        pthread_t t;
        int rv;

        /* use defaults? */
        if (argc == 1) {
                ethername = "etherbus";
                ethername_ro = "etherbus_ro";
                serveraddr = "10.3.2.1";
                serveraddr_ro = "10.4.2.1";
                netmask = "255.255.255.0";
                exportpath = "/myexport";
                imagename = "ffs.img";
        } else {
                ethername = argv[1];
                ethername_ro = argv[2];
                serveraddr = argv[3];
                serveraddr_ro = argv[4];
                netmask = argv[5];
                exportpath = argv[6];
                imagename = argv[7];
        }

        rump_init();
        svc_fdset_init(SVC_FDSET_MT);

        rv = rump_pub_etfs_register("/etc/exports", "./exports", RUMP_ETFS_REG);
        if (rv) {
                errx(1, "register /etc/exports: %s", strerror(rv));
        }

        /* mini-mtree for mountd */
        static const char *const dirs[] = { "/var", "/var/run", "/var/db" };
        for (size_t i = 0; i < __arraycount(dirs); i++)
                if (rump_sys_mkdir(dirs[i], 0777) == -1)
                        err(1, "can't mkdir `%s'", dirs[i]);

        if (ffs_fstest_newfs(NULL, &fsarg,
            imagename, FSTEST_IMGSIZE, NULL) != 0)
                err(1, "newfs failed");
        if (ffs_fstest_mount(NULL, fsarg, exportpath, 0) != 0)
                err(1, "mount failed");

#if 0
        /*
         * Serve from host instead of dedicated mount?
         * THIS IS MORE EVIL THAN MURRAY THE DEMONIC TALKING SKULL!
         */

        if (ukfs_modload("/usr/lib/librumpfs_syspuffs.so") < 1)
                errx(1, "modload");

        mount_syspuffs_parseargs(__arraycount(pnullarg), pnullarg,
            &args, &mntflags, canon_dev, canon_dir);
        if ((ukfs = ukfs_mount(MOUNT_PUFFS, "/", UKFS_DEFAULTMP, MNT_RDONLY,
            &args, sizeof(args))) == NULL)
                err(1, "mount");

        if (ukfs_modload("/usr/lib/librumpfs_nfsserver.so") < 1)
                errx(1, "modload");
#endif

        if (sem_init(&gensem, 1, 0) == -1)
                err(1, "gensem init");

        /* create interface */
        netcfg_rump_makeshmif(ethername, ifname);
        netcfg_rump_if(ifname, serveraddr, netmask);

        netcfg_rump_makeshmif(ethername_ro, ifname_ro);
        netcfg_rump_if(ifname_ro, serveraddr_ro, netmask);

        /*
         * No syslogging, thanks.
         * XXX: "0" does not modify the mask, so pick something
         * which is unlikely to cause any logging
         */
        setlogmask(0x10000000);

        if (pthread_create(&t, NULL, rpcbind_main, NULL) == -1)
                err(1, "rpcbind");
        sem_wait(&gensem);

        if (pthread_create(&t, NULL, mountd_main, NULL) == -1)
                err(1, "mountd");
        sem_wait(&gensem);

        rv = 0;
        /* signal the other process we're almost done */
        if (write(3, &rv, 4) != 4)
                errx(1, "magic write failed");

        {
        char *nfsargv[] = { __UNCONST("nfsd"), NULL };
        nfsd_main(1, nfsargv);
        }
        /*NOTREACHED*/

        return 0;
}