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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#ifndef Rdma_Acceptor_h
#define Rdma_Acceptor_h
#include "qpid/sys/rdma/rdma_wrap.h"
#include "qpid/sys/AtomicValue.h"
#include "qpid/sys/Dispatcher.h"
#include "qpid/sys/DispatchHandle.h"
#include "qpid/sys/Mutex.h"
#include "qpid/sys/SocketAddress.h"
#include <netinet/in.h>
#include <boost/function.hpp>
namespace Rdma {
class Connection;
class AsynchIO
{
typedef boost::function1<void, AsynchIO&> ErrorCallback;
typedef boost::function2<void, AsynchIO&, Buffer*> ReadCallback;
typedef boost::function1<void, AsynchIO&> IdleCallback;
typedef boost::function2<void, AsynchIO&, Buffer*> FullCallback;
typedef boost::function1<void, AsynchIO&> NotifyCallback;
int protocolVersion;
int bufferSize;
int recvCredit;
int xmitCredit;
int recvBufferCount;
int xmitBufferCount;
int outstandingWrites;
bool draining;
enum State {IDLE, NOTIFY, NOTIFY_PENDING, STOPPED};
State state;
qpid::sys::Mutex stateLock;
QueuePair::intrusive_ptr qp;
qpid::sys::DispatchHandleRef dataHandle;
ReadCallback readCallback;
IdleCallback idleCallback;
FullCallback fullCallback;
ErrorCallback errorCallback;
NotifyCallback notifyCallback;
qpid::sys::DispatchHandle::Callback pendingWriteAction;
public:
typedef boost::function1<void, AsynchIO&> RequestCallback;
// TODO: Instead of specifying a buffer size specify the amount of memory the AsynchIO class can use
// for buffers both read and write (allocate half to each up front) and fail if we cannot allocate that much
// locked memory
AsynchIO(
QueuePair::intrusive_ptr q,
int version,
int size,
int xCredit,
int rCount,
ReadCallback rc,
IdleCallback ic,
FullCallback fc,
ErrorCallback ec
);
~AsynchIO();
void start(qpid::sys::Poller::shared_ptr poller);
bool writable() const;
void queueWrite(Buffer* buff);
void notifyPendingWrite();
void drainWriteQueue(NotifyCallback);
void stop(NotifyCallback);
void requestCallback(RequestCallback);
int incompletedWrites() const;
Buffer* getSendBuffer();
void returnSendBuffer(Buffer*);
private:
const static int maxSupportedProtocolVersion = 1;
// Constants for the peer-peer command messages
// These are sent in the high bits if the imm data of an rdma message
// The low bits are used to send the credit
const static int FlagsMask = 0xF0000000; // Mask for all flag bits - be sure to update this if you add more command bits
const static int IgnoreData = 0x10000000; // Message contains no application data
void dataEvent();
void writeEvent();
void processCompletions();
void doWriteCallback();
void checkDrained();
void doStoppedCallback();
void queueBuffer(Buffer* buff, int credit);
Buffer* extractBuffer(const QueuePairEvent& e);
};
// We're only writable if:
// * not draining write queue
// * we've got space in the transmit queue
// * we've got credit to transmit
// * if there's only 1 transmit credit we must send some credit
inline bool AsynchIO::writable() const {
assert(xmitCredit>=0);
return !draining &&
outstandingWrites < xmitBufferCount &&
xmitCredit > 0 &&
( xmitCredit > 1 || recvCredit > 0);
}
inline int AsynchIO::incompletedWrites() const {
return outstandingWrites;
}
inline Buffer* AsynchIO::getSendBuffer() {
return qp->getSendBuffer();
}
inline void AsynchIO::returnSendBuffer(Buffer* b) {
qp->returnSendBuffer(b);
}
// These are the parameters necessary to start the conversation
// * Each peer HAS to allocate buffers of the size of the maximum receive from its peer
// * Each peer HAS to know the initial "credit" it has for transmitting to its peer
struct ConnectionParams {
uint32_t maxRecvBufferSize;
uint16_t initialXmitCredit;
uint16_t rdmaProtocolVersion;
// Default to protocol version 1
ConnectionParams(uint32_t s, uint16_t c, uint16_t v = 1) :
maxRecvBufferSize(s),
initialXmitCredit(c),
rdmaProtocolVersion(v)
{}
};
enum ErrorType {
ADDR_ERROR,
ROUTE_ERROR,
CONNECT_ERROR,
UNREACHABLE,
UNKNOWN
};
typedef boost::function2<void, Rdma::Connection::intrusive_ptr, ErrorType> ErrorCallback;
typedef boost::function1<void, Rdma::Connection::intrusive_ptr> DisconnectedCallback;
class ConnectionManager {
typedef boost::function1<void, ConnectionManager&> NotifyCallback;
enum State {IDLE, STOPPED};
qpid::sys::AtomicValue<State> state;
Connection::intrusive_ptr ci;
qpid::sys::DispatchHandleRef handle;
NotifyCallback notifyCallback;
protected:
ErrorCallback errorCallback;
DisconnectedCallback disconnectedCallback;
public:
ConnectionManager(
ErrorCallback errc,
DisconnectedCallback dc
);
virtual ~ConnectionManager();
void start(qpid::sys::Poller::shared_ptr poller, const qpid::sys::SocketAddress& addr);
void stop(NotifyCallback);
private:
void event(qpid::sys::DispatchHandle& handle);
void doStoppedCallback();
virtual void startConnection(Connection::intrusive_ptr ci, const qpid::sys::SocketAddress& addr) = 0;
virtual void connectionEvent(Connection::intrusive_ptr ci) = 0;
};
typedef boost::function2<bool, Rdma::Connection::intrusive_ptr, const ConnectionParams&> ConnectionRequestCallback;
typedef boost::function1<void, Rdma::Connection::intrusive_ptr> EstablishedCallback;
class Listener : public ConnectionManager
{
ConnectionParams checkConnectionParams;
ConnectionRequestCallback connectionRequestCallback;
EstablishedCallback establishedCallback;
public:
Listener(
const ConnectionParams& cp,
EstablishedCallback ec,
ErrorCallback errc,
DisconnectedCallback dc,
ConnectionRequestCallback crc = 0
);
private:
void startConnection(Connection::intrusive_ptr ci, const qpid::sys::SocketAddress& addr);
void connectionEvent(Connection::intrusive_ptr ci);
};
typedef boost::function2<void, Rdma::Connection::intrusive_ptr, const ConnectionParams&> RejectedCallback;
typedef boost::function2<void, Rdma::Connection::intrusive_ptr, const ConnectionParams&> ConnectedCallback;
class Connector : public ConnectionManager
{
ConnectionParams connectionParams;
RejectedCallback rejectedCallback;
ConnectedCallback connectedCallback;
public:
Connector(
const ConnectionParams& cp,
ConnectedCallback cc,
ErrorCallback errc,
DisconnectedCallback dc,
RejectedCallback rc = 0
);
private:
void startConnection(Connection::intrusive_ptr ci, const qpid::sys::SocketAddress& addr);
void connectionEvent(Connection::intrusive_ptr ci);
};
}
#endif // Rdma_Acceptor_h
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