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131 lines
3.7 KiB
Plaintext
131 lines
3.7 KiB
Plaintext
/* @(#)klm_prot.x 2.1 88/08/01 4.0 RPCSRC */
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/*
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* Kernel/lock manager protocol definition
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* Copyright (c) 2010, Oracle America, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* * Neither the name of the "Oracle America, Inc." nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* protocol used between the UNIX kernel (the "client") and the
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* local lock manager. The local lock manager is a deamon running
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* above the kernel.
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*/
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const LM_MAXSTRLEN = 1024;
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/*
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* lock manager status returns
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*/
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enum klm_stats {
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klm_granted = 0, /* lock is granted */
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klm_denied = 1, /* lock is denied */
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klm_denied_nolocks = 2, /* no lock entry available */
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klm_working = 3 /* lock is being processed */
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};
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/*
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* lock manager lock identifier
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*/
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struct klm_lock {
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string server_name<LM_MAXSTRLEN>;
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netobj fh; /* a counted file handle */
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int pid; /* holder of the lock */
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unsigned l_offset; /* beginning offset of the lock */
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unsigned l_len; /* byte length of the lock;
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* zero means through end of file */
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};
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/*
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* lock holder identifier
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*/
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struct klm_holder {
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bool exclusive; /* FALSE if shared lock */
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int svid; /* holder of the lock (pid) */
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unsigned l_offset; /* beginning offset of the lock */
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unsigned l_len; /* byte length of the lock;
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* zero means through end of file */
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};
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/*
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* reply to KLM_LOCK / KLM_UNLOCK / KLM_CANCEL
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*/
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struct klm_stat {
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klm_stats stat;
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};
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/*
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* reply to a KLM_TEST call
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*/
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union klm_testrply switch (klm_stats stat) {
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case klm_denied:
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struct klm_holder holder;
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default: /* All other cases return no arguments */
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void;
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};
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/*
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* arguments to KLM_LOCK
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*/
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struct klm_lockargs {
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bool block;
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bool exclusive;
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struct klm_lock alock;
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};
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/*
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* arguments to KLM_TEST
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*/
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struct klm_testargs {
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bool exclusive;
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struct klm_lock alock;
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};
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/*
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* arguments to KLM_UNLOCK
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*/
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struct klm_unlockargs {
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struct klm_lock alock;
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};
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program KLM_PROG {
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version KLM_VERS {
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klm_testrply KLM_TEST (struct klm_testargs) = 1;
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klm_stat KLM_LOCK (struct klm_lockargs) = 2;
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klm_stat KLM_CANCEL (struct klm_lockargs) = 3;
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/* klm_granted=> the cancel request fails due to lock is already granted */
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/* klm_denied=> the cancel request successfully aborts
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lock request */
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klm_stat KLM_UNLOCK (struct klm_unlockargs) = 4;
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} = 1;
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} = 100020;
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