1 /* $NetBSD: nfs_nfssvc.c,v 1.2 2016/12/13 22:41:46 pgoyette 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 298788 2016-04-29 16:07:25Z pfg "); */ 37 __RCSID("$NetBSD: nfs_nfssvc.c,v 1.2 2016/12/13 22:41:46 pgoyette Exp $"); 38 39 #ifdef _KERNEL_OPT 40 #include "opt_newnfs.h" 41 #endif 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/sysproto.h> 46 #include <sys/kernel.h> 47 #include <sys/sysctl.h> 48 #include <sys/priv.h> 49 #include <sys/proc.h> 50 #include <sys/lock.h> 51 #include <sys/mutex.h> 52 #include <sys/module.h> 53 #include <sys/sysent.h> 54 #include <sys/syscall.h> 55 56 #include <security/audit/audit.h> 57 58 #include <fs/nfs/common/nfssvc.h> 59 60 static int nfssvc_offset = SYS_nfssvc; 61 static struct sysent nfssvc_prev_sysent; 62 MAKE_SYSENT(nfssvc); 63 64 /* 65 * This tiny module simply handles the nfssvc() system call. The other 66 * nfs modules that use the system call register themselves by setting 67 * the nfsd_call_xxx function pointers non-NULL. 68 */ 69 70 int (*nfsd_call_nfsserver)(struct thread *, struct nfssvc_args *) = NULL; 71 int (*nfsd_call_nfscommon)(struct thread *, struct nfssvc_args *) = NULL; 72 int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *) = NULL; 73 int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *) = NULL; 74 75 /* 76 * Nfs server pseudo system call for the nfsd's 77 */ 78 int 79 sys_nfssvc(struct thread *td, struct nfssvc_args *uap) 80 { 81 int error; 82 83 KASSERT(!mtx_owned(&Giant), ("nfssvc(): called with Giant")); 84 85 AUDIT_ARG_CMD(uap->flag); 86 87 /* Allow anyone to get the stats. */ 88 if ((uap->flag & ~NFSSVC_GETSTATS) != 0) { 89 error = priv_check(td, PRIV_NFS_DAEMON); 90 if (error != 0) 91 return (error); 92 } 93 error = EINVAL; 94 if ((uap->flag & (NFSSVC_ADDSOCK | NFSSVC_OLDNFSD | NFSSVC_NFSD)) && 95 nfsd_call_nfsserver != NULL) 96 error = (*nfsd_call_nfsserver)(td, uap); 97 else if ((uap->flag & (NFSSVC_CBADDSOCK | NFSSVC_NFSCBD | 98 NFSSVC_DUMPMNTOPTS)) && nfsd_call_nfscl != NULL) 99 error = (*nfsd_call_nfscl)(td, uap); 100 else if ((uap->flag & (NFSSVC_IDNAME | NFSSVC_GETSTATS | 101 NFSSVC_GSSDADDPORT | NFSSVC_GSSDADDFIRST | NFSSVC_GSSDDELETEALL | 102 NFSSVC_NFSUSERDPORT | NFSSVC_NFSUSERDDELPORT)) && 103 nfsd_call_nfscommon != NULL) 104 error = (*nfsd_call_nfscommon)(td, uap); 105 else if ((uap->flag & (NFSSVC_NFSDNFSD | NFSSVC_NFSDADDSOCK | 106 NFSSVC_PUBLICFH | NFSSVC_V4ROOTEXPORT | NFSSVC_NOPUBLICFH | 107 NFSSVC_STABLERESTART | NFSSVC_ADMINREVOKE | 108 NFSSVC_DUMPCLIENTS | NFSSVC_DUMPLOCKS | NFSSVC_BACKUPSTABLE | 109 NFSSVC_SUSPENDNFSD | NFSSVC_RESUMENFSD)) && 110 nfsd_call_nfsd != NULL) 111 error = (*nfsd_call_nfsd)(td, uap); 112 if (error == EINTR || error == ERESTART) 113 error = 0; 114 return (error); 115 } 116 117 /* 118 * Called once to initialize data structures... 119 */ 120 static int 121 nfssvc_modevent(module_t mod, int type, void *data) 122 { 123 static int registered; 124 int error = 0; 125 126 switch (type) { 127 case MOD_LOAD: 128 error = syscall_register(&nfssvc_offset, &nfssvc_sysent, 129 &nfssvc_prev_sysent, SY_THR_STATIC_KLD); 130 if (error) 131 break; 132 registered = 1; 133 break; 134 135 case MOD_UNLOAD: 136 if (nfsd_call_nfsserver != NULL || nfsd_call_nfscommon != NULL 137 || nfsd_call_nfscl != NULL || nfsd_call_nfsd != NULL) { 138 error = EBUSY; 139 break; 140 } 141 if (registered) 142 syscall_deregister(&nfssvc_offset, &nfssvc_prev_sysent); 143 registered = 0; 144 break; 145 default: 146 error = EOPNOTSUPP; 147 break; 148 } 149 return error; 150 } 151 static moduledata_t nfssvc_mod = { 152 "nfssvc", 153 nfssvc_modevent, 154 NULL, 155 }; 156 DECLARE_MODULE(nfssvc, nfssvc_mod, SI_SUB_VFS, SI_ORDER_ANY); 157 158 /* So that loader and kldload(2) can find us, wherever we are.. */ 159 MODULE_VERSION(nfssvc, 1); 160 161
Indexes created Sat Sep 20 22:09:52 GMT 2025