1 /* @(#)klm_prot.x 2.1 88/08/01 4.0 RPCSRC */
2 /* @(#)klm_prot.x 1.7 87/07/08 Copyr 1987 Sun Micro */
5 * Kernel/lock manager protocol definition
6 * Copyright (C) 1986 Sun Microsystems, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
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35 * protocol used between the UNIX kernel (the "client") and the
36 * local lock manager. The local lock manager is a deamon running
40 const LM_MAXSTRLEN = 1024;
43 * lock manager status returns
46 klm_granted = 0, /* lock is granted */
47 klm_denied = 1, /* lock is denied */
48 klm_denied_nolocks = 2, /* no lock entry available */
49 klm_working = 3 /* lock is being processed */
53 * lock manager lock identifier
56 string server_name<LM_MAXSTRLEN>;
57 netobj fh; /* a counted file handle */
58 int pid; /* holder of the lock */
59 unsigned l_offset; /* beginning offset of the lock */
60 unsigned l_len; /* byte length of the lock;
61 * zero means through end of file */
65 * lock holder identifier
68 bool exclusive; /* FALSE if shared lock */
69 int svid; /* holder of the lock (pid) */
70 unsigned l_offset; /* beginning offset of the lock */
71 unsigned l_len; /* byte length of the lock;
72 * zero means through end of file */
76 * reply to KLM_LOCK / KLM_UNLOCK / KLM_CANCEL
83 * reply to a KLM_TEST call
85 union klm_testrply switch (klm_stats stat) {
87 struct klm_holder holder;
88 default: /* All other cases return no arguments */
94 * arguments to KLM_LOCK
99 struct klm_lock alock;
103 * arguments to KLM_TEST
105 struct klm_testargs {
107 struct klm_lock alock;
111 * arguments to KLM_UNLOCK
113 struct klm_unlockargs {
114 struct klm_lock alock;
120 klm_testrply KLM_TEST (struct klm_testargs) = 1;
122 klm_stat KLM_LOCK (struct klm_lockargs) = 2;
124 klm_stat KLM_CANCEL (struct klm_lockargs) = 3;
125 /* klm_granted=> the cancel request fails due to lock is already granted */
126 /* klm_denied=> the cancel request successfully aborts
129 klm_stat KLM_UNLOCK (struct klm_unlockargs) = 4;