mirror of
https://github.com/ceph/ceph
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84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
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// vim: ts=8 sw=2 smarttab
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/*
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* Ceph - scalable distributed file system
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*
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* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
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*
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* This is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software
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* Foundation. See file COPYING.
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*
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*/
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#ifndef CEPH_MDSTABLESERVER_H
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#define CEPH_MDSTABLESERVER_H
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#include "MDSTable.h"
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class MMDSTableRequest;
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class MDSTableServer : public MDSTable {
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public:
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int table;
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map<version_t,mds_table_pending_t> pending_for_mds; // ** child should encode this! **
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private:
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void handle_prepare(MMDSTableRequest *m);
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void _prepare_logged(MMDSTableRequest *m, version_t tid);
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friend class C_Prepare;
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void handle_commit(MMDSTableRequest *m);
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void _commit_logged(MMDSTableRequest *m);
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friend class C_Commit;
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void handle_rollback(MMDSTableRequest *m);
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public:
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virtual void handle_query(MMDSTableRequest *m) = 0;
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virtual void _prepare(bufferlist &bl, uint64_t reqid, mds_rank_t bymds) = 0;
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virtual bool _commit(version_t tid, MMDSTableRequest *req=NULL) = 0;
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virtual void _rollback(version_t tid) = 0;
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virtual void _server_update(bufferlist& bl) { ceph_abort(); }
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void _note_prepare(mds_rank_t mds, uint64_t reqid) {
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pending_for_mds[version].mds = mds;
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pending_for_mds[version].reqid = reqid;
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pending_for_mds[version].tid = version;
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}
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void _note_commit(uint64_t tid) {
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pending_for_mds.erase(tid);
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}
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void _note_rollback(uint64_t tid) {
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pending_for_mds.erase(tid);
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}
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MDSTableServer(MDSRank *m, int tab) : MDSTable(m, get_mdstable_name(tab), false), table(tab) {}
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virtual ~MDSTableServer() {}
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void handle_request(MMDSTableRequest *m);
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void do_server_update(bufferlist& bl);
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virtual void encode_server_state(bufferlist& bl) const = 0;
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virtual void decode_server_state(bufferlist::iterator& bl) = 0;
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void encode_state(bufferlist& bl) const {
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encode_server_state(bl);
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::encode(pending_for_mds, bl);
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}
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void decode_state(bufferlist::iterator& bl) {
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decode_server_state(bl);
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::decode(pending_for_mds, bl);
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}
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// recovery
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void finish_recovery(set<mds_rank_t>& active);
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void handle_mds_recovery(mds_rank_t who);
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};
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#endif
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