93 lines
1.8 KiB
Plaintext
93 lines
1.8 KiB
Plaintext
/* @(#)klm_prot.x 1.3 88/05/26 4.0NFSSRC SMI */
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/*
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* Copyright (c) 1988 by Sun Microsystems, Inc.
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* @(#) from SUN 1.9
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*/
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/*
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* Kernel/lock manager protocol definition
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* Copyright (C) 1986 Sun Microsystems, Inc.
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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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klm_deadlck = 5 /* deadlock detected */
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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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