nfs_nfssvc.c revision 1.1
1 /* $NetBSD: nfs_nfssvc.c,v 1.1 2013/09/30 07:19:33 dholland Exp $ */ 2 /*- 3 * Copyright (c) 1989, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Rick Macklem at The University of Guelph. 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 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 */ 34 35 #include <sys/cdefs.h> 36 /* __FBSDID("FreeBSD: head/sys/nfs/nfs_nfssvc.c 243782 2012-12-02 01:16:04Z rmacklem "); */ 37 __RCSID("$NetBSD: nfs_nfssvc.c,v 1.1 2013/09/30 07:19:33 dholland Exp $"); 38 39 #include "opt_nfs.h" 40 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> 46 #include <sys/priv.h> 47 #include <sys/proc.h> 48 #include <sys/lock.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> 54 55 #include <security/audit/audit.h> 56 57 #include <nfs/nfssvc.h> 58 59 static int nfssvc_offset = SYS_nfssvc; 60 static struct sysent nfssvc_prev_sysent; 61 MAKE_SYSENT(nfssvc); 62 63 /* 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. 67 */ 68 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; 73 74 /* 75 * Nfs server psuedo system call for the nfsd's 76 */ 77 int 78 sys_nfssvc(struct thread *td, struct nfssvc_args *uap) 79 { 80 int error; 81 82 KASSERT(!mtx_owned(&Giant), ("nfssvc(): called with Giant")); 83 84 AUDIT_ARG_CMD(uap->flag); 85 86 /* Allow anyone to get the stats. */ 87 if ((uap->flag & ~NFSSVC_GETSTATS) != 0) { 88 error = priv_check(td, PRIV_NFS_DAEMON); 89 if (error != 0) 90 return (error); 91 } 92 error = EINVAL; 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)) && 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) 112 error = 0; 113 return (error); 114 } 115 116 /* 117 * Called once to initialize data structures... 118 */ 119 static int 120 nfssvc_modevent(module_t mod, int type, void *data) 121 { 122 static int registered; 123 int error = 0; 124 125 switch (type) { 126 case MOD_LOAD: 127 error = syscall_register(&nfssvc_offset, &nfssvc_sysent, 128 &nfssvc_prev_sysent); 129 if (error) 130 break; 131 registered = 1; 132 break; 133 134 case MOD_UNLOAD: 135 if (nfsd_call_nfsserver != NULL || nfsd_call_nfscommon != NULL 136 || nfsd_call_nfscl != NULL || nfsd_call_nfsd != NULL) { 137 error = EBUSY; 138 break; 139 } 140 if (registered) 141 syscall_deregister(&nfssvc_offset, &nfssvc_prev_sysent); 142 registered = 0; 143 break; 144 default: 145 error = EOPNOTSUPP; 146 break; 147 } 148 return error; 149 } 150 static moduledata_t nfssvc_mod = { 151 "nfssvc", 152 nfssvc_modevent, 153 NULL, 154 }; 155 DECLARE_MODULE(nfssvc, nfssvc_mod, SI_SUB_VFS, SI_ORDER_ANY); 156 157 /* So that loader and kldload(2) can find us, wherever we are.. */ 158 MODULE_VERSION(nfssvc, 1); 159 160
Indexes created Wed Sep 24 02:09:48 GMT 2025