/*      $NetBSD: netbsd32_nfssvc.c,v 1.9 2021/12/11 19:24:21 mrg Exp $  */

/*
* Copyright (c) 2015 Matthew R. Green
* All rights reserved.
*
* 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 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: netbsd32_nfssvc.c,v 1.9 2021/12/11 19:24:21 mrg Exp $");

#if defined(_KERNEL_OPT)
#include "opt_nfs.h"
#include "opt_nfsserver.h"
#include "opt_compat_netbsd.h"
#endif

#include <sys/param.h>
#include <sys/vnode.h>
#include <sys/filedesc.h>
#include <sys/module.h>
#include <sys/syscallvar.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_syscall.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>
#include <compat/netbsd32/netbsd32_conv.h>

#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/nfs_var.h>

static int nfssvc32_addsock_in(struct nfsd_args *, const void *);
static int nfssvc32_setexports_in(struct mountd_exports_list *, const void *);
static int nfssvc32_nsd_in(struct nfsd_srvargs *, const void *);
static int nfssvc32_nsd_out(void *, const struct nfsd_srvargs *);
static int nfssvc32_exp_in(struct export_args *, const void *, size_t);

static int
nfssvc32_addsock_in(struct nfsd_args *nfsdarg, const void *argp)
{
       struct netbsd32_nfsd_args args32;
       int error;

       error = copyin(argp, &args32, sizeof args32);
       if (!error) {
               nfsdarg->sock = args32.sock;
               nfsdarg->name = NETBSD32PTR64(args32.name);
               nfsdarg->namelen = args32.namelen;
       }

       return error;
}

static int
nfssvc32_setexports_in(struct mountd_exports_list *mel, const void *argp)
{
       struct netbsd32_mountd_exports_list args32;
       int error;

       error = copyin(argp, &args32, sizeof args32);
       if (!error) {
               mel->mel_path = NETBSD32PTR64(args32.mel_path);
               mel->mel_nexports = args32.mel_nexports;
               mel->mel_exports = NETBSD32PTR64(args32.mel_exports);
       }

       return error;
}

static int
nfssvc32_nsd_in(struct nfsd_srvargs *nsd, const void *argp)
{
       struct netbsd32_nfsd_srvargs args32;
       int error;

       error = copyin(argp, &args32, sizeof args32);
       if (!error) {
               nsd->nsd_nfsd = NETBSD32PTR64(args32.nsd_nfsd);
               nsd->nsd_uid = args32.nsd_uid;
               nsd->nsd_haddr = args32.nsd_haddr;
               nsd->nsd_cr = args32.nsd_cr;
               nsd->nsd_authlen = args32.nsd_authlen;
               nsd->nsd_authstr = NETBSD32PTR64(args32.nsd_authstr);
               nsd->nsd_verflen = args32.nsd_verflen;
               nsd->nsd_uid = args32.nsd_uid;
               netbsd32_to_timeval(&args32.nsd_timestamp, &nsd->nsd_timestamp);
               nsd->nsd_ttl = args32.nsd_ttl;
               nsd->nsd_key[0] = args32.nsd_key[0];
               nsd->nsd_key[1] = args32.nsd_key[1];
       }

       return error;
}

static int
nfssvc32_nsd_out(void *argp, const struct nfsd_srvargs *nsd)
{
       struct netbsd32_nfsd_srvargs args32;

       memset(&args32, 0, sizeof(args32));
       NETBSD32PTR32(args32.nsd_nfsd, nsd->nsd_nfsd);
       args32.nsd_uid = nsd->nsd_uid;
       args32.nsd_haddr = nsd->nsd_haddr;
       args32.nsd_cr = nsd->nsd_cr;
       args32.nsd_authlen = nsd->nsd_authlen;
       NETBSD32PTR32(args32.nsd_authstr, nsd->nsd_authstr);
       args32.nsd_verflen = nsd->nsd_verflen;
       args32.nsd_uid = nsd->nsd_uid;
       netbsd32_from_timeval(&nsd->nsd_timestamp, &args32.nsd_timestamp);
       args32.nsd_ttl = nsd->nsd_ttl;
       args32.nsd_key[0] = nsd->nsd_key[0];
       args32.nsd_key[1] = nsd->nsd_key[1];

       return copyout(&args32, argp, sizeof args32);
}

static int
nfssvc32_exp_in(struct export_args *exp, const void *argp, size_t nexports)
{
       struct netbsd32_export_args exp32;
       struct netbsd32_export_args const *argp32 = argp;
       int error = 0;

       for (size_t i = 0; i < nexports; i++) {
               error = copyin(argp32, &exp32, sizeof exp32);
               if (error)
                       break;
               exp->ex_flags = exp32.ex_flags;
               exp->ex_root = exp32.ex_root;
               exp->ex_anon = exp32.ex_anon;
               exp->ex_addr = NETBSD32PTR64(exp32.ex_addr);
               exp->ex_addrlen = exp32.ex_addrlen;
               exp->ex_mask = NETBSD32PTR64(exp32.ex_mask);
               exp->ex_masklen = exp32.ex_masklen;
               exp->ex_indexfile = NETBSD32PTR64(exp32.ex_indexfile);
               exp++;
               argp32++;
       }

       return error;
}

/*
* NFS server system calls
*/

static struct nfssvc_copy_ops netbsd32_ops = {
       .addsock_in = nfssvc32_addsock_in,
       .setexports_in = nfssvc32_setexports_in,
       .nsd_in = nfssvc32_nsd_in,
       .nsd_out = nfssvc32_nsd_out,
       .exp_in = nfssvc32_exp_in,
};

int
netbsd32_nfssvc(struct lwp *l, const struct netbsd32_nfssvc_args *uap,
   register_t *retval)
{
       /* {
               syscallarg(int) flag;
               syscallarg(netbsd32_voidp *) argp;
       } */
       int     flag = SCARG(uap, flag);
       void    *argp = SCARG_P32(uap, argp);

       return do_nfssvc(&netbsd32_ops, l, flag, argp, retval);
}

static const struct syscall_package compat_nfssvc_syscalls[] = {
       { NETBSD32_SYS_netbsd32_nfssvc, 0, (sy_call_t *)netbsd32_nfssvc },
       { 0, 0, NULL },
};

MODULE(MODULE_CLASS_EXEC, compat_netbsd32_nfssrv, "nfsserver,compat_netbsd32");

static int
compat_netbsd32_nfssrv_modcmd(modcmd_t cmd, void *arg)
{
       int error;

       switch (cmd) {
       case MODULE_CMD_INIT:
               error = syscall_establish(&emul_netbsd32,
                   compat_nfssvc_syscalls);
               break;
       case MODULE_CMD_FINI:
               error = syscall_disestablish(&emul_netbsd32,
                   compat_nfssvc_syscalls);
               break;
       default:
               error = ENOTTY;
               break;
       }
       return error;
}

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