2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Rick Macklem at The University of Guelph.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/sysproto.h>
44 #include <sys/kernel.h>
45 #include <sys/sysctl.h>
49 #include <sys/mutex.h>
50 #include <sys/module.h>
51 #include <sys/sysent.h>
52 #include <sys/syscall.h>
53 #include <sys/sysproto.h>
55 #include <security/audit/audit.h>
57 #include <nfs/nfssvc.h>
59 static int nfssvc_offset = SYS_nfssvc;
60 static struct sysent nfssvc_prev_sysent;
64 * This tiny module simply handles the nfssvc() system call. The other
65 * nfs modules that use the system call register themselves by setting
66 * the nfsd_call_xxx function pointers non-NULL.
69 int (*nfsd_call_nfsserver)(struct thread *, struct nfssvc_args *) = NULL;
70 int (*nfsd_call_nfscommon)(struct thread *, struct nfssvc_args *) = NULL;
71 int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *) = NULL;
72 int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *) = NULL;
75 * Nfs server pseudo system call for the nfsd's
78 sys_nfssvc(struct thread *td, struct nfssvc_args *uap)
82 KASSERT(!mtx_owned(&Giant), ("nfssvc(): called with Giant"));
84 AUDIT_ARG_CMD(uap->flag);
86 /* Allow anyone to get the stats. */
87 if ((uap->flag & ~NFSSVC_GETSTATS) != 0) {
88 error = priv_check(td, PRIV_NFS_DAEMON);
93 if ((uap->flag & (NFSSVC_ADDSOCK | NFSSVC_OLDNFSD | NFSSVC_NFSD)) &&
94 nfsd_call_nfsserver != NULL)
95 error = (*nfsd_call_nfsserver)(td, uap);
96 else if ((uap->flag & (NFSSVC_CBADDSOCK | NFSSVC_NFSCBD |
97 NFSSVC_DUMPMNTOPTS | NFSSVC_FORCEDISM)) && nfsd_call_nfscl != NULL)
98 error = (*nfsd_call_nfscl)(td, uap);
99 else if ((uap->flag & (NFSSVC_IDNAME | NFSSVC_GETSTATS |
100 NFSSVC_GSSDADDPORT | NFSSVC_GSSDADDFIRST | NFSSVC_GSSDDELETEALL |
101 NFSSVC_NFSUSERDPORT | NFSSVC_NFSUSERDDELPORT)) &&
102 nfsd_call_nfscommon != NULL)
103 error = (*nfsd_call_nfscommon)(td, uap);
104 else if ((uap->flag & (NFSSVC_NFSDNFSD | NFSSVC_NFSDADDSOCK |
105 NFSSVC_PUBLICFH | NFSSVC_V4ROOTEXPORT | NFSSVC_NOPUBLICFH |
106 NFSSVC_STABLERESTART | NFSSVC_ADMINREVOKE |
107 NFSSVC_DUMPCLIENTS | NFSSVC_DUMPLOCKS | NFSSVC_BACKUPSTABLE |
108 NFSSVC_SUSPENDNFSD | NFSSVC_RESUMENFSD)) &&
109 nfsd_call_nfsd != NULL)
110 error = (*nfsd_call_nfsd)(td, uap);
111 if (error == EINTR || error == ERESTART)
117 * Called once to initialize data structures...
120 nfssvc_modevent(module_t mod, int type, void *data)
122 static int registered;
127 error = syscall_register(&nfssvc_offset, &nfssvc_sysent,
128 &nfssvc_prev_sysent, SY_THR_STATIC_KLD);
135 if (nfsd_call_nfsserver != NULL || nfsd_call_nfscommon != NULL
136 || nfsd_call_nfscl != NULL || nfsd_call_nfsd != NULL) {
141 syscall_deregister(&nfssvc_offset, &nfssvc_prev_sysent);
150 static moduledata_t nfssvc_mod = {
155 DECLARE_MODULE(nfssvc, nfssvc_mod, SI_SUB_VFS, SI_ORDER_ANY);
157 /* So that loader and kldload(2) can find us, wherever we are.. */
158 MODULE_VERSION(nfssvc, 1);