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/*
* Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
*
* 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 Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser 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
*/
#ifndef _LVM_CLOG_CLUSTER_H
#define _LVM_CLOG_CLUSTER_H
#include "dm-log-userspace.h"
#include "libdevmapper.h"
#define DM_ULOG_RESPONSE 0x1000U /* in last byte of 32-bit value */
#define DM_ULOG_CHECKPOINT_READY 21
#define DM_ULOG_MEMBER_JOIN 22
/*
* There is other information in addition to what can
* be found in the dm_ulog_request structure that we
* need for processing. 'clog_request' is the wrapping
* structure we use to make the additional fields
* available.
*/
struct clog_request {
/*
* If we don't use a union, the structure size will
* vary between 32-bit and 64-bit machines. So, we
* pack two 64-bit version numbers in there to force
* the size of the structure to be the same.
*
* The two version numbers also help us with endian
* issues. The first is always little endian, while
* the second is in native format of the sending
* machine. If the two are equal, there is no need
* to do endian conversions.
*/
union {
uint64_t version[2]; /* LE version and native version */
struct dm_list list;
} u;
/*
* 'originator' is the machine from which the requests
* was made.
*/
uint32_t originator;
/*
* 'pit_server' is the "point-in-time" server for the
* request. (I.e. The machine that was the server at
* the time the request was issued - only important during
* startup.
*/
uint32_t pit_server;
/*
* The request from the kernel that is being processed
*/
struct dm_ulog_request u_rq;
};
int init_cluster(void);
void cleanup_cluster(void);
void cluster_debug(void);
int create_cluster_cpg(char *uuid, uint64_t luid);
int destroy_cluster_cpg(char *uuid);
int cluster_send(struct clog_request *rq);
#endif /* _LVM_CLOG_CLUSTER_H */
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