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71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/*
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* Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License v.2.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Definitions for CLVMD server and clients */
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/*
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* The protocol spoken over the cluster and across the local socket.
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*/
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#ifndef _CLVM_H
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#define _CLVM_H
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struct clvm_header {
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uint8_t cmd; /* See below */
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uint8_t flags; /* See below */
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uint16_t xid; /* Transaction ID */
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uint32_t clientid; /* Only used in Daemon->Daemon comms */
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int32_t status; /* For replies, whether request succeeded */
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uint32_t arglen; /* Length of argument below.
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If >1500 then it will be passed
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around the cluster in the system LV */
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char node[1]; /* Actually a NUL-terminated string, node name.
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If this is empty then the command is
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forwarded to all cluster nodes unless
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FLAG_LOCAL is also set. */
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char args[1]; /* Arguments for the command follow the
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node name, This member is only
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valid if the node name is empty */
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} __attribute__ ((packed));
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/* Flags */
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#define CLVMD_FLAG_LOCAL 1 /* Only do this on the local node */
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#define CLVMD_FLAG_SYSTEMLV 2 /* Data in system LV under my node name */
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#define CLVMD_FLAG_NODEERRS 4 /* Reply has errors in node-specific portion */
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/* Name of the local socket to communicate between libclvm and clvmd */
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//static const char CLVMD_SOCKNAME[]="/var/run/clvmd";
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static const char CLVMD_SOCKNAME[] = "\0clvmd";
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/* Internal commands & replies */
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#define CLVMD_CMD_REPLY 1
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#define CLVMD_CMD_VERSION 2 /* Send version around cluster when we start */
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#define CLVMD_CMD_GOAWAY 3 /* Die if received this - we are running
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an incompatible version */
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#define CLVMD_CMD_TEST 4 /* Just for mucking about */
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#define CLVMD_CMD_LOCK 30
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#define CLVMD_CMD_UNLOCK 31
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/* Lock/Unlock commands */
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#define CLVMD_CMD_LOCK_LV 50
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#define CLVMD_CMD_LOCK_VG 51
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/* Misc functions */
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#define CLVMD_CMD_REFRESH 40
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#define CLVMD_CMD_GET_CLUSTERNAME 41
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#endif
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