1 /*- 2 * Copyright (c) 2010, Oracle America, Inc. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following 12 * disclaimer in the documentation and/or other materials 13 * provided with the distribution. 14 * * Neither the name of the "Oracle America, Inc." nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 22 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 25 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Kernel/lock manager protocol definition 34 * Copyright (C) 1986 Sun Microsystems, Inc. 35 * 36 * protocol used between the UNIX kernel (the "client") and the 37 * local lock manager. The local lock manager is a daemon running 38 * above the kernel. 39 */ 40 41 #ifndef RPC_HDR 42 %#ifndef lint 43 %/*static char sccsid[] = "from: @(#)klm_prot.x 1.7 87/07/08 Copyr 1987 Sun Micro";*/ 44 %/*static char sccsid[] = "from: @(#)klm_prot.x 2.1 88/08/01 4.0 RPCSRC";*/ 45 %#endif /* not lint */ 46 %#include <sys/cdefs.h> 47 #endif 48 49 const LM_MAXSTRLEN = 1024; 50 51 /* 52 * lock manager status returns 53 */ 54 enum klm_stats { 55 klm_granted = 0, /* lock is granted */ 56 klm_denied = 1, /* lock is denied */ 57 klm_denied_nolocks = 2, /* no lock entry available */ 58 klm_working = 3 /* lock is being processed */ 59 }; 60 61 /* 62 * lock manager lock identifier 63 */ 64 struct klm_lock { 65 string server_name<LM_MAXSTRLEN>; 66 netobj fh; /* a counted file handle */ 67 int pid; /* holder of the lock */ 68 unsigned l_offset; /* beginning offset of the lock */ 69 unsigned l_len; /* byte length of the lock; 70 * zero means through end of file */ 71 }; 72 73 /* 74 * lock holder identifier 75 */ 76 struct klm_holder { 77 bool exclusive; /* FALSE if shared lock */ 78 int svid; /* holder of the lock (pid) */ 79 unsigned l_offset; /* beginning offset of the lock */ 80 unsigned l_len; /* byte length of the lock; 81 * zero means through end of file */ 82 }; 83 84 /* 85 * reply to KLM_LOCK / KLM_UNLOCK / KLM_CANCEL 86 */ 87 struct klm_stat { 88 klm_stats stat; 89 }; 90 91 /* 92 * reply to a KLM_TEST call 93 */ 94 union klm_testrply switch (klm_stats stat) { 95 case klm_denied: 96 struct klm_holder holder; 97 default: /* All other cases return no arguments */ 98 void; 99 }; 100 101 102 /* 103 * arguments to KLM_LOCK 104 */ 105 struct klm_lockargs { 106 bool block; 107 bool exclusive; 108 struct klm_lock alock; 109 }; 110 111 /* 112 * arguments to KLM_TEST 113 */ 114 struct klm_testargs { 115 bool exclusive; 116 struct klm_lock alock; 117 }; 118 119 /* 120 * arguments to KLM_UNLOCK 121 */ 122 struct klm_unlockargs { 123 struct klm_lock alock; 124 }; 125 126 program KLM_PROG { 127 version KLM_VERS { 128 129 klm_testrply KLM_TEST (struct klm_testargs) = 1; 130 131 klm_stat KLM_LOCK (struct klm_lockargs) = 2; 132 133 klm_stat KLM_CANCEL (struct klm_lockargs) = 3; 134 /* klm_granted=> the cancel request fails due to lock is already granted */ 135 /* klm_denied=> the cancel request successfully aborts 136 lock request */ 137 138 klm_stat KLM_UNLOCK (struct klm_unlockargs) = 4; 139 } = 1; 140 } = 100020; 141