+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-/*
- * Ceph - scalable distributed file system
- *
- * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
- *
- * This is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software
- * Foundation. See file COPYING.
- *
- */
-
-#include "MDSTableServer.h"
-#include "MDSRank.h"
-#include "MDLog.h"
-#include "msg/Messenger.h"
-
-#include "messages/MMDSTableRequest.h"
-#include "events/ETableServer.h"
-
-#define dout_context g_ceph_context
-#define dout_subsys ceph_subsys_mds
-#undef dout_prefix
-#define dout_prefix *_dout << "mds." << rank << ".tableserver(" << get_mdstable_name(table) << ") "
-
-/* This function DOES put the passed message before returning */
-void MDSTableServer::handle_request(MMDSTableRequest *req)
-{
- assert(req->op >= 0);
- switch (req->op) {
- case TABLESERVER_OP_QUERY: return handle_query(req);
- case TABLESERVER_OP_PREPARE: return handle_prepare(req);
- case TABLESERVER_OP_COMMIT: return handle_commit(req);
- case TABLESERVER_OP_ROLLBACK: return handle_rollback(req);
- default: assert(0 == "unrecognized mds_table_server request op");
- }
-}
-
-class C_Prepare : public MDSLogContextBase {
- MDSTableServer *server;
- MMDSTableRequest *req;
- version_t tid;
- MDSRank *get_mds() override { return server->mds; }
-public:
-
- C_Prepare(MDSTableServer *s, MMDSTableRequest *r, version_t v) : server(s), req(r), tid(v) {}
- void finish(int r) override {
- server->_prepare_logged(req, tid);
- }
-};
-
-// prepare
-/* This function DOES put the passed message before returning */
-void MDSTableServer::handle_prepare(MMDSTableRequest *req)
-{
- dout(7) << "handle_prepare " << *req << dendl;
- mds_rank_t from = mds_rank_t(req->get_source().num());
- bufferlist bl = req->bl;
-
- _prepare(req->bl, req->reqid, from);
- _note_prepare(from, req->reqid);
-
- assert(g_conf->mds_kill_mdstable_at != 1);
-
- ETableServer *le = new ETableServer(table, TABLESERVER_OP_PREPARE, req->reqid, from, version, version);
- mds->mdlog->start_entry(le);
- le->mutation = bl; // original request, NOT modified return value coming out of _prepare!
- mds->mdlog->submit_entry(le, new C_Prepare(this, req, version));
- mds->mdlog->flush();
-}
-
-void MDSTableServer::_prepare_logged(MMDSTableRequest *req, version_t tid)
-{
- dout(7) << "_create_logged " << *req << " tid " << tid << dendl;
-
- assert(g_conf->mds_kill_mdstable_at != 2);
-
- MMDSTableRequest *reply = new MMDSTableRequest(table, TABLESERVER_OP_AGREE, req->reqid, tid);
- reply->bl = req->bl;
- mds->send_message_mds(reply, mds_rank_t(req->get_source().num()));
- req->put();
-}
-
-class C_Commit : public MDSLogContextBase {
- MDSTableServer *server;
- MMDSTableRequest *req;
- MDSRank *get_mds() override { return server->mds; }
-public:
- C_Commit(MDSTableServer *s, MMDSTableRequest *r) : server(s), req(r) {}
- void finish(int r) override {
- server->_commit_logged(req);
- }
-};
-
-// commit
-/* This function DOES put the passed message before returning */
-void MDSTableServer::handle_commit(MMDSTableRequest *req)
-{
- dout(7) << "handle_commit " << *req << dendl;
-
- version_t tid = req->get_tid();
-
- if (pending_for_mds.count(tid)) {
-
- assert(g_conf->mds_kill_mdstable_at != 5);
-
- if (!_commit(tid, req))
- return;
-
- _note_commit(tid);
- mds->mdlog->start_submit_entry(new ETableServer(table, TABLESERVER_OP_COMMIT, 0, MDS_RANK_NONE,
- tid, version),
- new C_Commit(this, req));
- }
- else if (tid <= version) {
- dout(0) << "got commit for tid " << tid << " <= " << version
- << ", already committed, sending ack."
- << dendl;
- _commit_logged(req);
- }
- else {
- // wtf.
- dout(0) << "got commit for tid " << tid << " > " << version << dendl;
- assert(tid <= version);
- }
-}
-
-/* This function DOES put the passed message before returning */
-void MDSTableServer::_commit_logged(MMDSTableRequest *req)
-{
- dout(7) << "_commit_logged, sending ACK" << dendl;
-
- assert(g_conf->mds_kill_mdstable_at != 6);
-
- MMDSTableRequest *reply = new MMDSTableRequest(table, TABLESERVER_OP_ACK, req->reqid, req->get_tid());
- mds->send_message_mds(reply, mds_rank_t(req->get_source().num()));
- req->put();
-}
-
-// ROLLBACK
-/* This function DOES put the passed message before returning */
-void MDSTableServer::handle_rollback(MMDSTableRequest *req)
-{
- dout(7) << "handle_rollback " << *req << dendl;
-
- version_t tid = req->get_tid();
- assert(pending_for_mds.count(tid));
- _rollback(tid);
- _note_rollback(tid);
- mds->mdlog->start_submit_entry(new ETableServer(table, TABLESERVER_OP_ROLLBACK, 0, MDS_RANK_NONE,
- tid, version));
- req->put();
-}
-
-
-
-// SERVER UPDATE
-
-void MDSTableServer::do_server_update(bufferlist& bl)
-{
- dout(10) << "do_server_update len " << bl.length() << dendl;
- _server_update(bl);
- ETableServer *le = new ETableServer(table, TABLESERVER_OP_SERVER_UPDATE, 0, MDS_RANK_NONE, 0, version);
- mds->mdlog->start_entry(le);
- le->mutation = bl;
- mds->mdlog->submit_entry(le);
-}
-
-
-// recovery
-
-void MDSTableServer::finish_recovery(set<mds_rank_t>& active)
-{
- dout(7) << "finish_recovery" << dendl;
- for (set<mds_rank_t>::iterator p = active.begin(); p != active.end(); ++p)
- handle_mds_recovery(*p); // resend agrees for everyone.
-}
-
-void MDSTableServer::handle_mds_recovery(mds_rank_t who)
-{
- dout(7) << "handle_mds_recovery mds." << who << dendl;
-
- uint64_t next_reqid = 0;
- // resend agrees for recovered mds
- for (map<version_t,mds_table_pending_t>::iterator p = pending_for_mds.begin();
- p != pending_for_mds.end();
- ++p) {
- if (p->second.mds != who)
- continue;
- if (p->second.reqid >= next_reqid)
- next_reqid = p->second.reqid + 1;
- MMDSTableRequest *reply = new MMDSTableRequest(table, TABLESERVER_OP_AGREE, p->second.reqid, p->second.tid);
- mds->send_message_mds(reply, who);
- }
-
- MMDSTableRequest *reply = new MMDSTableRequest(table, TABLESERVER_OP_SERVER_READY, next_reqid);
- mds->send_message_mds(reply, who);
-}
Code Review / stor4nfv.git / blobdiff