openbox lab initialized

openflow/usr/include/rpcsvc/klm_prot.x

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