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31 * Kernel/lock manager protocol definition
32 * Copyright (C) 1986 Sun Microsystems, Inc.
34 * protocol used between the UNIX kernel (the "client") and the
35 * local lock manager. The local lock manager is a daemon running
40 %#include <sys/cdefs.h>
42 %/*static char sccsid[] = "from: @(#)klm_prot.x 1.7 87/07/08 Copyr 1987 Sun Micro";*/
43 %/*static char sccsid[] = "from: @(#)klm_prot.x 2.1 88/08/01 4.0 RPCSRC";*/
44 %__RCSID("$NetBSD: klm_prot.x,v 1.5 2002/01/21 14:42:26 wiz Exp $");
45 %#endif /* not __lint__ */
48 const LM_MAXSTRLEN = 1024;
51 * lock manager status returns
54 klm_granted = 0, /* lock is granted */
55 klm_denied = 1, /* lock is denied */
56 klm_denied_nolocks = 2, /* no lock entry available */
57 klm_working = 3 /* lock is being processed */
61 * lock manager lock identifier
64 string server_name<LM_MAXSTRLEN>;
65 netobj fh; /* a counted file handle */
66 int pid; /* holder of the lock */
67 unsigned l_offset; /* beginning offset of the lock */
68 unsigned l_len; /* byte length of the lock;
69 * zero means through end of file */
73 * lock holder identifier
76 bool exclusive; /* FALSE if shared lock */
77 int svid; /* holder of the lock (pid) */
78 unsigned l_offset; /* beginning offset of the lock */
79 unsigned l_len; /* byte length of the lock;
80 * zero means through end of file */
84 * reply to KLM_LOCK / KLM_UNLOCK / KLM_CANCEL
91 * reply to a KLM_TEST call
93 union klm_testrply switch (klm_stats stat) {
95 struct klm_holder holder;
96 default: /* All other cases return no arguments */
102 * arguments to KLM_LOCK
104 struct klm_lockargs {
107 struct klm_lock alock;
111 * arguments to KLM_TEST
113 struct klm_testargs {
115 struct klm_lock alock;
119 * arguments to KLM_UNLOCK
121 struct klm_unlockargs {
122 struct klm_lock alock;
128 klm_testrply KLM_TEST (struct klm_testargs) = 1;
130 klm_stat KLM_LOCK (struct klm_lockargs) = 2;
132 klm_stat KLM_CANCEL (struct klm_lockargs) = 3;
133 /* klm_granted=> the cancel request fails due to lock is already granted */
134 /* klm_denied=> the cancel request successfully aborts
137 klm_stat KLM_UNLOCK (struct klm_unlockargs) = 4;