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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS 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/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_nfs.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/module.h>
#include <sys/sysent.h>
#include <sys/syscall.h>
#include <sys/sysproto.h>
#include <security/audit/audit.h>
#include <nfs/nfssvc.h>
static struct syscall_helper_data nfssvc_syscalls[] = {
SYSCALL_INIT_HELPER(nfssvc),
SYSCALL_INIT_LAST
};
/*
* This tiny module simply handles the nfssvc() system call. The other
* nfs modules that use the system call register themselves by setting
* the nfsd_call_xxx function pointers non-NULL.
*/
int (*nfsd_call_nfsserver)(struct thread *, struct nfssvc_args *) = NULL;
int (*nfsd_call_nfscommon)(struct thread *, struct nfssvc_args *) = NULL;
int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *) = NULL;
int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *) = NULL;
/*
* Nfs server pseudo system call for the nfsd's
*/
int
sys_nfssvc(struct thread *td, struct nfssvc_args *uap)
{
int error;
KASSERT(!mtx_owned(&Giant), ("nfssvc(): called with Giant"));
AUDIT_ARG_CMD(uap->flag);
/* Allow anyone to get the stats. */
if ((uap->flag & ~(NFSSVC_GETSTATS | NFSSVC_NEWSTRUCT)) != 0) {
error = priv_check(td, PRIV_NFS_DAEMON);
if (error != 0)
return (error);
}
error = EINVAL;
if ((uap->flag & (NFSSVC_ADDSOCK | NFSSVC_OLDNFSD | NFSSVC_NFSD)) &&
nfsd_call_nfsserver != NULL)
error = (*nfsd_call_nfsserver)(td, uap);
else if ((uap->flag & (NFSSVC_CBADDSOCK | NFSSVC_NFSCBD |
NFSSVC_DUMPMNTOPTS | NFSSVC_FORCEDISM)) && nfsd_call_nfscl != NULL)
error = (*nfsd_call_nfscl)(td, uap);
else if ((uap->flag & (NFSSVC_IDNAME | NFSSVC_GETSTATS |
NFSSVC_GSSDADDPORT | NFSSVC_GSSDADDFIRST | NFSSVC_GSSDDELETEALL |
NFSSVC_NFSUSERDPORT | NFSSVC_NFSUSERDDELPORT)) &&
nfsd_call_nfscommon != NULL)
error = (*nfsd_call_nfscommon)(td, uap);
else if ((uap->flag & (NFSSVC_NFSDNFSD | NFSSVC_NFSDADDSOCK |
NFSSVC_PUBLICFH | NFSSVC_V4ROOTEXPORT | NFSSVC_NOPUBLICFH |
NFSSVC_STABLERESTART | NFSSVC_ADMINREVOKE |
NFSSVC_DUMPCLIENTS | NFSSVC_DUMPLOCKS | NFSSVC_BACKUPSTABLE |
NFSSVC_SUSPENDNFSD | NFSSVC_RESUMENFSD | NFSSVC_PNFSDS)) &&
nfsd_call_nfsd != NULL)
error = (*nfsd_call_nfsd)(td, uap);
if (error == EINTR || error == ERESTART)
error = 0;
return (error);
}
/*
* Called once to initialize data structures...
*/
static int
nfssvc_modevent(module_t mod, int type, void *data)
{
int error = 0;
switch (type) {
case MOD_LOAD:
error = syscall_helper_register(nfssvc_syscalls,
SY_THR_STATIC_KLD);
break;
case MOD_UNLOAD:
if (nfsd_call_nfsserver != NULL || nfsd_call_nfscommon != NULL
|| nfsd_call_nfscl != NULL || nfsd_call_nfsd != NULL) {
error = EBUSY;
break;
}
syscall_helper_unregister(nfssvc_syscalls);
break;
default:
error = EOPNOTSUPP;
break;
}
return error;
}
static moduledata_t nfssvc_mod = {
"nfssvc",
nfssvc_modevent,
NULL,
};
DECLARE_MODULE(nfssvc, nfssvc_mod, SI_SUB_VFS, SI_ORDER_ANY);
/* So that loader and kldload(2) can find us, wherever we are.. */
MODULE_VERSION(nfssvc, 1);
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