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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/**
* This is used to send pings between monitors for
* heartbeat purposes. We include a timestamp and distinguish between
* outgoing pings and responses to those. If you set the
* min_message in the constructor, the message will inflate itself
* to the specified size -- this is good for dealing with network
* issues with jumbo frames. See http://tracker.ceph.com/issues/20087
*
*/
#ifndef CEPH_MMONPING_H
#define CEPH_MMONPING_H
#include "common/Clock.h"
#include "msg/Message.h"
#include "mon/ConnectionTracker.h"
class MMonPing final : public Message {
private:
static constexpr int HEAD_VERSION = 1;
static constexpr int COMPAT_VERSION = 1;
public:
enum {
PING = 1,
PING_REPLY = 2,
};
const char *get_op_name(int op) const {
switch (op) {
case PING: return "ping";
case PING_REPLY: return "ping_reply";
default: return "???";
}
}
__u8 op = 0;
utime_t stamp;
bufferlist tracker_bl;
uint32_t min_message_size = 0;
MMonPing(__u8 o, utime_t s, const bufferlist& tbl,
uint32_t min_message)
: Message{MSG_MON_PING, HEAD_VERSION, COMPAT_VERSION},
op(o), stamp(s), tracker_bl(tbl), min_message_size(min_message)
{}
MMonPing(__u8 o, utime_t s, const bufferlist& tbl)
: Message{MSG_MON_PING, HEAD_VERSION, COMPAT_VERSION},
op(o), stamp(s), tracker_bl(tbl) {}
MMonPing()
: Message{MSG_MON_PING, HEAD_VERSION, COMPAT_VERSION}
{}
private:
~MMonPing() final {}
public:
void decode_payload() override {
auto p = payload.cbegin();
decode(op, p);
decode(stamp, p);
decode(tracker_bl, p);
int payload_mid_length = p.get_off();
uint32_t size;
decode(size, p);
p += size;
min_message_size = size + payload_mid_length;
}
void encode_payload(uint64_t features) override {
using ceph::encode;
encode(op, payload);
encode(stamp, payload);
encode(tracker_bl, payload);
size_t s = 0;
if (min_message_size > payload.length()) {
s = min_message_size - payload.length();
}
encode((uint32_t)s, payload);
if (s) {
// this should be big enough for normal min_message padding sizes. since
// we are targeting jumbo ethernet frames around 9000 bytes, 16k should
// be more than sufficient! the compiler will statically zero this so
// that at runtime we are only adding a bufferptr reference to it.
static char zeros[16384] = {};
while (s > sizeof(zeros)) {
payload.append(buffer::create_static(sizeof(zeros), zeros));
s -= sizeof(zeros);
}
if (s) {
payload.append(buffer::create_static(s, zeros));
}
}
}
std::string_view get_type_name() const override { return "mon_ping"; }
void print(std::ostream& out) const override {
out << "mon_ping(" << get_op_name(op)
<< " stamp " << stamp
<< ")";
}
private:
template<class T, typename... Args>
friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
};
#endif
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