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/*
* Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License v.2.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* Definitions for CLVMD server and clients */
/*
* The protocol spoken over the cluster and across the local socket.
*/
#ifndef _CLVM_H
#define _CLVM_H
#include "configure.h"
struct clvm_header {
uint8_t cmd; /* See below */
uint8_t flags; /* See below */
uint16_t xid; /* Transaction ID */
uint32_t clientid; /* Only used in Daemon->Daemon comms */
int32_t status; /* For replies, whether request succeeded */
uint32_t arglen; /* Length of argument below.
If >1500 then it will be passed
around the cluster in the system LV */
char node[1]; /* Actually a NUL-terminated string, node name.
If this is empty then the command is
forwarded to all cluster nodes unless
FLAG_LOCAL or FLAG_REMOTE is also set. */
char args[1]; /* Arguments for the command follow the
node name, This member is only
valid if the node name is empty */
} __attribute__ ((packed));
/* Flags */
#define CLVMD_FLAG_LOCAL 1 /* Only do this on the local node */
#define CLVMD_FLAG_SYSTEMLV 2 /* Data in system LV under my node name */
#define CLVMD_FLAG_NODEERRS 4 /* Reply has errors in node-specific portion */
#define CLVMD_FLAG_REMOTE 8 /* Do this on all nodes except for the local node */
/* Name of the local socket to communicate between lvm and clvmd */
static const char CLVMD_SOCKNAME[]= DEFAULT_RUN_DIR "/clvmd.sock";
/* Internal commands & replies */
#define CLVMD_CMD_REPLY 1
#define CLVMD_CMD_VERSION 2 /* Send version around cluster when we start */
#define CLVMD_CMD_GOAWAY 3 /* Die if received this - we are running
an incompatible version */
#define CLVMD_CMD_TEST 4 /* Just for mucking about */
#define CLVMD_CMD_LOCK 30
#define CLVMD_CMD_UNLOCK 31
/* Lock/Unlock commands */
#define CLVMD_CMD_LOCK_LV 50
#define CLVMD_CMD_LOCK_VG 51
#define CLVMD_CMD_LOCK_QUERY 52
/* Misc functions */
#define CLVMD_CMD_REFRESH 40
#define CLVMD_CMD_GET_CLUSTERNAME 41
#define CLVMD_CMD_SET_DEBUG 42
#define CLVMD_CMD_VG_BACKUP 43
#define CLVMD_CMD_RESTART 44
#define CLVMD_CMD_SYNC_NAMES 45
/* Used internally by some callers, but not part of the protocol.*/
#define NODE_ALL "*"
#define NODE_LOCAL "."
#define NODE_REMOTE "^"
#endif
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