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/* $OpenBSD: klm_prot.x,v 1.6 2010/09/01 14:43:34 millert Exp $ */
/*
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of the "Oracle America, Inc." 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 COPYRIGHT HOLDERS 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
* COPYRIGHT HOLDER 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.
*/
/*
* Kernel/lock manager protocol definition
*
* protocol used between the UNIX kernel (the "client") and the
* local lock manager. The local lock manager is a daemon running
* above the kernel.
*/
#ifndef RPC_HDR
#endif
const LM_MAXSTRLEN = 1024;
/*
* lock manager status returns
*/
enum klm_stats {
klm_granted = 0, /* lock is granted */
klm_denied = 1, /* lock is denied */
klm_denied_nolocks = 2, /* no lock entry available */
klm_working = 3 /* lock is being processed */
};
/*
* lock manager lock identifier
*/
struct klm_lock {
string server_name<LM_MAXSTRLEN>;
netobj fh; /* a counted file handle */
int pid; /* holder of the lock */
unsigned l_offset; /* beginning offset of the lock */
unsigned l_len; /* byte length of the lock;
* zero means through end of file */
};
/*
* lock holder identifier
*/
struct klm_holder {
bool exclusive; /* FALSE if shared lock */
int svid; /* holder of the lock (pid) */
unsigned l_offset; /* beginning offset of the lock */
unsigned l_len; /* byte length of the lock;
* zero means through end of file */
};
/*
* reply to KLM_LOCK / KLM_UNLOCK / KLM_CANCEL
*/
struct klm_stat {
klm_stats stat;
};
/*
* reply to a KLM_TEST call
*/
union klm_testrply switch (klm_stats stat) {
case klm_denied:
struct klm_holder holder;
default: /* All other cases return no arguments */
void;
};
/*
* arguments to KLM_LOCK
*/
struct klm_lockargs {
bool block;
bool exclusive;
struct klm_lock alock;
};
/*
* arguments to KLM_TEST
*/
struct klm_testargs {
bool exclusive;
struct klm_lock alock;
};
/*
* arguments to KLM_UNLOCK
*/
struct klm_unlockargs {
struct klm_lock alock;
};
program KLM_PROG {
version KLM_VERS {
klm_testrply KLM_TEST (struct klm_testargs) = 1;
klm_stat KLM_LOCK (struct klm_lockargs) = 2;
klm_stat KLM_CANCEL (struct klm_lockargs) = 3;
/* klm_granted=> the cancel request fails due to lock is already granted */
/* klm_denied=> the cancel request successfully aborts
lock request */
klm_stat KLM_UNLOCK (struct klm_unlockargs) = 4;
} = 1;
} = 100020;
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