--- /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