X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Fmsg%2FConnection.h;fp=src%2Fceph%2Fsrc%2Fmsg%2FConnection.h;h=94e934c55f1335fbec249ed8f6954d835f5b1a52;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git diff --git a/src/ceph/src/msg/Connection.h b/src/ceph/src/msg/Connection.h new file mode 100644 index 0000000..94e934c --- /dev/null +++ b/src/ceph/src/msg/Connection.h @@ -0,0 +1,207 @@ +// -*- 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 + * + * 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. + * + */ + +#ifndef CEPH_CONNECTION_H +#define CEPH_CONNECTION_H + +#include +#include + +#include +// Because intusive_ptr clobbers our assert... +#include "include/assert.h" + +#include "include/types.h" +#include "include/buffer.h" + +#include "common/RefCountedObj.h" + +#include "common/debug.h" +#include "common/config.h" + + +// ====================================================== + +// abstract Connection, for keeping per-connection state + +class Message; +class Messenger; + +struct Connection : public RefCountedObject { + mutable Mutex lock; + Messenger *msgr; + RefCountedObject *priv; + int peer_type; + entity_addr_t peer_addr; + utime_t last_keepalive, last_keepalive_ack; +private: + uint64_t features; +public: + bool failed; // true if we are a lossy connection that has failed. + + int rx_buffers_version; + map > rx_buffers; + + friend class boost::intrusive_ptr; + friend class PipeConnection; + +public: + Connection(CephContext *cct, Messenger *m) + // we are managed exlusively by ConnectionRef; make it so you can + // ConnectionRef foo = new Connection; + : RefCountedObject(cct, 0), + lock("Connection::lock"), + msgr(m), + priv(NULL), + peer_type(-1), + features(0), + failed(false), + rx_buffers_version(0) { + } + + ~Connection() override { + //generic_dout(0) << "~Connection " << this << dendl; + if (priv) { + //generic_dout(0) << "~Connection " << this << " dropping priv " << priv << dendl; + priv->put(); + } + } + + void set_priv(RefCountedObject *o) { + Mutex::Locker l(lock); + if (priv) + priv->put(); + priv = o; + } + + RefCountedObject *get_priv() { + Mutex::Locker l(lock); + if (priv) + return priv->get(); + return NULL; + } + + /** + * Used to judge whether this connection is ready to send. Usually, the + * implementation need to build a own shakehand or sesson then it can be + * ready to send. + * + * @return true if ready to send, or false otherwise + */ + virtual bool is_connected() = 0; + + Messenger *get_messenger() { + return msgr; + } + + /** + * Queue the given Message to send out on the given Connection. + * Success in this function does not guarantee Message delivery, only + * success in queueing the Message. Other guarantees may be provided based + * on the Connection policy. + * + * @param m The Message to send. The Messenger consumes a single reference + * when you pass it in. + * + * @return 0 on success, or -errno on failure. + */ + virtual int send_message(Message *m) = 0; + /** + * Send a "keepalive" ping along the given Connection, if it's working. + * If the underlying connection has broken, this function does nothing. + * + * @return 0, or implementation-defined error numbers. + */ + virtual void send_keepalive() = 0; + /** + * Mark down the given Connection. + * + * This will cause us to discard its outgoing queue, and if reset + * detection is enabled in the policy and the endpoint tries to + * reconnect they will discard their queue when we inform them of + * the session reset. + * + * It does not generate any notifications to the Dispatcher. + */ + virtual void mark_down() = 0; + + /** + * Mark a Connection as "disposable", setting it to lossy + * (regardless of initial Policy). This does not immediately close + * the Connection once Messages have been delivered, so as long as + * there are no errors you can continue to receive responses; but it + * will not attempt to reconnect for message delivery or preserve + * your old delivery semantics, either. + * + * TODO: There's some odd stuff going on in our SimpleMessenger + * implementation during connect that looks unused; is there + * more of a contract that that's enforcing? + */ + virtual void mark_disposable() = 0; + + + int get_peer_type() const { return peer_type; } + void set_peer_type(int t) { peer_type = t; } + + bool peer_is_mon() const { return peer_type == CEPH_ENTITY_TYPE_MON; } + bool peer_is_mgr() const { return peer_type == CEPH_ENTITY_TYPE_MGR; } + bool peer_is_mds() const { return peer_type == CEPH_ENTITY_TYPE_MDS; } + bool peer_is_osd() const { return peer_type == CEPH_ENTITY_TYPE_OSD; } + bool peer_is_client() const { return peer_type == CEPH_ENTITY_TYPE_CLIENT; } + + const entity_addr_t& get_peer_addr() const { return peer_addr; } + void set_peer_addr(const entity_addr_t& a) { peer_addr = a; } + + uint64_t get_features() const { return features; } + bool has_feature(uint64_t f) const { return features & f; } + bool has_features(uint64_t f) const { + return (features & f) == f; + } + void set_features(uint64_t f) { features = f; } + void set_feature(uint64_t f) { features |= f; } + + void post_rx_buffer(ceph_tid_t tid, bufferlist& bl) { + Mutex::Locker l(lock); + ++rx_buffers_version; + rx_buffers[tid] = pair(bl, rx_buffers_version); + } + + void revoke_rx_buffer(ceph_tid_t tid) { + Mutex::Locker l(lock); + rx_buffers.erase(tid); + } + + utime_t get_last_keepalive() const { + Mutex::Locker l(lock); + return last_keepalive; + } + void set_last_keepalive(utime_t t) { + Mutex::Locker l(lock); + last_keepalive = t; + } + utime_t get_last_keepalive_ack() const { + Mutex::Locker l(lock); + return last_keepalive_ack; + } + void set_last_keepalive_ack(utime_t t) { + Mutex::Locker l(lock); + last_keepalive_ack = t; + } + +}; + +typedef boost::intrusive_ptr ConnectionRef; + + +#endif /* CEPH_CONNECTION_H */