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