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33 * Kernel/lock manager protocol definition
34 * Copyright (C) 1986 Sun Microsystems, Inc.
36 * protocol used between the UNIX kernel (the "client") and the
37 * local lock manager. The local lock manager is a daemon running
43 %/*static char sccsid[] = "from: @(#)klm_prot.x 1.7 87/07/08 Copyr 1987 Sun Micro";*/
44 %/*static char sccsid[] = "from: @(#)klm_prot.x 2.1 88/08/01 4.0 RPCSRC";*/
45 %#endif /* not lint */
46 %#include <sys/cdefs.h>
49 const LM_MAXSTRLEN = 1024;
52 * lock manager status returns
55 klm_granted = 0, /* lock is granted */
56 klm_denied = 1, /* lock is denied */
57 klm_denied_nolocks = 2, /* no lock entry available */
58 klm_working = 3 /* lock is being processed */
62 * lock manager lock identifier
65 string server_name<LM_MAXSTRLEN>;
66 netobj fh; /* a counted file handle */
67 int pid; /* holder of the lock */
68 unsigned l_offset; /* beginning offset of the lock */
69 unsigned l_len; /* byte length of the lock;
70 * zero means through end of file */
74 * lock holder identifier
77 bool exclusive; /* FALSE if shared lock */
78 int svid; /* holder of the lock (pid) */
79 unsigned l_offset; /* beginning offset of the lock */
80 unsigned l_len; /* byte length of the lock;
81 * zero means through end of file */
85 * reply to KLM_LOCK / KLM_UNLOCK / KLM_CANCEL
92 * reply to a KLM_TEST call
94 union klm_testrply switch (klm_stats stat) {
96 struct klm_holder holder;
97 default: /* All other cases return no arguments */
103 * arguments to KLM_LOCK
105 struct klm_lockargs {
108 struct klm_lock alock;
112 * arguments to KLM_TEST
114 struct klm_testargs {
116 struct klm_lock alock;
120 * arguments to KLM_UNLOCK
122 struct klm_unlockargs {
123 struct klm_lock alock;
129 klm_testrply KLM_TEST (struct klm_testargs) = 1;
131 klm_stat KLM_LOCK (struct klm_lockargs) = 2;
133 klm_stat KLM_CANCEL (struct klm_lockargs) = 3;
134 /* klm_granted=> the cancel request fails due to lock is already granted */
135 /* klm_denied=> the cancel request successfully aborts
138 klm_stat KLM_UNLOCK (struct klm_unlockargs) = 4;