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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef _MSG_ASYNC_PROTOCOL_V1_
#define _MSG_ASYNC_PROTOCOL_V1_
#include "Protocol.h"
class ProtocolV1;
using CtPtr = Ct<ProtocolV1>*;
class ProtocolV1 : public Protocol {
/*
* ProtocolV1 State Machine
*
send_server_banner send_client_banner
| |
v v
wait_client_banner wait_server_banner
| |
| v
v handle_server_banner_and_identify
wait_connect_message <---------\ |
| | | v
| wait_connect_message_auth | send_connect_message <----------\
| | | | |
v v | | |
handle_connect_message_2 | v |
| | | wait_connect_reply |
v v | | | |
replace -> send_connect_message_reply | V |
| | wait_connect_reply_auth |
| | | |
v v v |
open ---\ handle_connect_reply_2 --------/
| | |
| v v
| wait_seq wait_ack_seq
| | |
v v v
server_ready client_ready
| |
\------------------> wait_message <------------/
| ^ | ^
/------------------------/ | | |
| | | \----------------- ------------\
v /----------/ v |
handle_keepalive2 | handle_message_header read_message_footer
handle_keepalive2_ack | | ^
handle_tag_ack | v |
| | throttle_message read_message_data
\----------------/ | ^
v |
read_message_front --> read_message_middle --/
*/
protected:
enum State {
NONE = 0,
START_CONNECT,
CONNECTING,
CONNECTING_WAIT_BANNER_AND_IDENTIFY,
CONNECTING_SEND_CONNECT_MSG,
START_ACCEPT,
ACCEPTING,
ACCEPTING_WAIT_CONNECT_MSG_AUTH,
ACCEPTING_HANDLED_CONNECT_MSG,
OPENED,
THROTTLE_MESSAGE,
THROTTLE_BYTES,
THROTTLE_DISPATCH_QUEUE,
READ_MESSAGE_FRONT,
READ_FOOTER_AND_DISPATCH,
CLOSED,
WAIT,
STANDBY
};
static const char *get_state_name(int state) {
const char *const statenames[] = {"NONE",
"START_CONNECT",
"CONNECTING",
"CONNECTING_WAIT_BANNER_AND_IDENTIFY",
"CONNECTING_SEND_CONNECT_MSG",
"START_ACCEPT",
"ACCEPTING",
"ACCEPTING_WAIT_CONNECT_MSG_AUTH",
"ACCEPTING_HANDLED_CONNECT_MSG",
"OPENED",
"THROTTLE_MESSAGE",
"THROTTLE_BYTES",
"THROTTLE_DISPATCH_QUEUE",
"READ_MESSAGE_FRONT",
"READ_FOOTER_AND_DISPATCH",
"CLOSED",
"WAIT",
"STANDBY"};
return statenames[state];
}
char *temp_buffer;
enum class WriteStatus { NOWRITE, REPLACING, CANWRITE, CLOSED };
std::atomic<WriteStatus> can_write;
std::list<Message *> sent; // the first bufferlist need to inject seq
// priority queue for outbound msgs
std::map<int, std::list<std::pair<bufferlist, Message *>>> out_q;
bool keepalive;
bool write_in_progress = false;
__u32 connect_seq, peer_global_seq;
std::atomic<uint64_t> in_seq{0};
std::atomic<uint64_t> out_seq{0};
std::atomic<uint64_t> ack_left{0};
CryptoKey session_key;
std::shared_ptr<AuthSessionHandler> session_security;
std::unique_ptr<AuthAuthorizerChallenge> authorizer_challenge; // accept side
// Open state
ceph_msg_connect connect_msg;
ceph_msg_connect_reply connect_reply;
bufferlist authorizer_buf;
utime_t backoff; // backoff time
utime_t recv_stamp;
utime_t throttle_stamp;
unsigned msg_left;
uint64_t cur_msg_size;
ceph_msg_header current_header;
bufferlist data_buf;
bufferlist::iterator data_blp;
bufferlist front, middle, data;
bool replacing; // when replacing process happened, we will reply connect
// side with RETRY tag and accept side will clear replaced
// connection. So when connect side reissue connect_msg,
// there won't exists conflicting connection so we use
// "replacing" to skip RESETSESSION to avoid detect wrong
// presentation
bool is_reset_from_peer;
bool once_ready;
State state;
void run_continuation(CtPtr pcontinuation);
CtPtr read(CONTINUATION_RX_TYPE<ProtocolV1> &next, int len,
char *buffer = nullptr);
CtPtr write(CONTINUATION_TX_TYPE<ProtocolV1> &next,bufferlist &bl);
inline CtPtr _fault() { // helper fault method that stops continuation
fault();
return nullptr;
}
CONTINUATION_DECL(ProtocolV1, wait_message);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_message);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_keepalive2);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_keepalive2_ack);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_tag_ack);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_message_header);
CONTINUATION_DECL(ProtocolV1, throttle_message);
CONTINUATION_DECL(ProtocolV1, throttle_bytes);
CONTINUATION_DECL(ProtocolV1, throttle_dispatch_queue);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_message_front);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_message_middle);
CONTINUATION_DECL(ProtocolV1, read_message_data);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_message_data);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_message_footer);
CtPtr ready();
CtPtr wait_message();
CtPtr handle_message(char *buffer, int r);
CtPtr handle_keepalive2(char *buffer, int r);
void append_keepalive_or_ack(bool ack = false, utime_t *t = nullptr);
CtPtr handle_keepalive2_ack(char *buffer, int r);
CtPtr handle_tag_ack(char *buffer, int r);
CtPtr handle_message_header(char *buffer, int r);
CtPtr throttle_message();
CtPtr throttle_bytes();
CtPtr throttle_dispatch_queue();
CtPtr read_message_front();
CtPtr handle_message_front(char *buffer, int r);
CtPtr read_message_middle();
CtPtr handle_message_middle(char *buffer, int r);
CtPtr read_message_data_prepare();
CtPtr read_message_data();
CtPtr handle_message_data(char *buffer, int r);
CtPtr read_message_footer();
CtPtr handle_message_footer(char *buffer, int r);
void session_reset();
void randomize_out_seq();
Message *_get_next_outgoing(bufferlist *bl);
void prepare_send_message(uint64_t features, Message *m, bufferlist &bl);
ssize_t write_message(Message *m, bufferlist &bl, bool more);
void requeue_sent();
uint64_t discard_requeued_up_to(uint64_t out_seq, uint64_t seq);
void discard_out_queue();
void reset_recv_state();
void reset_security();
ostream &_conn_prefix(std::ostream *_dout);
public:
ProtocolV1(AsyncConnection *connection);
virtual ~ProtocolV1();
virtual void connect() override;
virtual void accept() override;
virtual bool is_connected() override;
virtual void stop() override;
virtual void fault() override;
virtual void send_message(Message *m) override;
virtual void send_keepalive() override;
virtual void read_event() override;
virtual void write_event() override;
virtual bool is_queued() override;
// Client Protocol
private:
int global_seq;
AuthAuthorizer *authorizer;
CONTINUATION_DECL(ProtocolV1, send_client_banner);
WRITE_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_client_banner_write);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_server_banner_and_identify);
WRITE_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_my_addr_write);
CONTINUATION_DECL(ProtocolV1, send_connect_message);
WRITE_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_connect_message_write);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_connect_reply_1);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_connect_reply_auth);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_ack_seq);
WRITE_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_in_seq_write);
CtPtr send_client_banner();
CtPtr handle_client_banner_write(int r);
CtPtr wait_server_banner();
CtPtr handle_server_banner_and_identify(char *buffer, int r);
CtPtr handle_my_addr_write(int r);
CtPtr send_connect_message();
CtPtr handle_connect_message_write(int r);
CtPtr wait_connect_reply();
CtPtr handle_connect_reply_1(char *buffer, int r);
CtPtr wait_connect_reply_auth();
CtPtr handle_connect_reply_auth(char *buffer, int r);
CtPtr handle_connect_reply_2();
CtPtr wait_ack_seq();
CtPtr handle_ack_seq(char *buffer, int r);
CtPtr handle_in_seq_write(int r);
CtPtr client_ready();
// Server Protocol
protected:
bool wait_for_seq;
CONTINUATION_DECL(ProtocolV1, send_server_banner);
WRITE_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_server_banner_write);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_client_banner);
CONTINUATION_DECL(ProtocolV1, wait_connect_message);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_connect_message_1);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_connect_message_auth);
WRITE_HANDLER_CONTINUATION_DECL(ProtocolV1,
handle_connect_message_reply_write);
WRITE_HANDLER_CONTINUATION_DECL(ProtocolV1,
handle_ready_connect_message_reply_write);
READ_HANDLER_CONTINUATION_DECL(ProtocolV1, handle_seq);
CtPtr send_server_banner();
CtPtr handle_server_banner_write(int r);
CtPtr wait_client_banner();
CtPtr handle_client_banner(char *buffer, int r);
CtPtr wait_connect_message();
CtPtr handle_connect_message_1(char *buffer, int r);
CtPtr wait_connect_message_auth();
CtPtr handle_connect_message_auth(char *buffer, int r);
CtPtr handle_connect_message_2();
CtPtr send_connect_message_reply(char tag, ceph_msg_connect_reply &reply,
bufferlist &authorizer_reply);
CtPtr handle_connect_message_reply_write(int r);
CtPtr replace(AsyncConnectionRef existing, ceph_msg_connect_reply &reply,
bufferlist &authorizer_reply);
CtPtr open(ceph_msg_connect_reply &reply, bufferlist &authorizer_reply);
CtPtr handle_ready_connect_message_reply_write(int r);
CtPtr wait_seq();
CtPtr handle_seq(char *buffer, int r);
CtPtr server_ready();
};
class LoopbackProtocolV1 : public ProtocolV1 {
public:
LoopbackProtocolV1(AsyncConnection *connection) : ProtocolV1(connection) {
this->can_write = WriteStatus::CANWRITE;
}
};
#endif /* _MSG_ASYNC_PROTOCOL_V1_ */
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