]>
Commit | Line | Data |
---|---|---|
f67539c2 TL |
1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /** | |
4 | * This is used to send pings between monitors for | |
5 | * heartbeat purposes. We include a timestamp and distinguish between | |
6 | * outgoing pings and responses to those. If you set the | |
7 | * min_message in the constructor, the message will inflate itself | |
8 | * to the specified size -- this is good for dealing with network | |
9 | * issues with jumbo frames. See http://tracker.ceph.com/issues/20087 | |
10 | * | |
11 | */ | |
12 | ||
13 | #ifndef CEPH_MMONPING_H | |
14 | #define CEPH_MMONPING_H | |
15 | ||
16 | #include "common/Clock.h" | |
17 | ||
18 | #include "msg/Message.h" | |
19 | #include "mon/ConnectionTracker.h" | |
20 | ||
21 | class MMonPing final : public Message { | |
22 | private: | |
23 | static constexpr int HEAD_VERSION = 1; | |
24 | static constexpr int COMPAT_VERSION = 1; | |
25 | ||
26 | public: | |
27 | enum { | |
28 | PING = 1, | |
29 | PING_REPLY = 2, | |
30 | }; | |
31 | const char *get_op_name(int op) const { | |
32 | switch (op) { | |
33 | case PING: return "ping"; | |
34 | case PING_REPLY: return "ping_reply"; | |
35 | default: return "???"; | |
36 | } | |
37 | } | |
38 | ||
39 | __u8 op = 0; | |
40 | utime_t stamp; | |
41 | bufferlist tracker_bl; | |
42 | uint32_t min_message_size = 0; | |
43 | ||
44 | MMonPing(__u8 o, utime_t s, const bufferlist& tbl, | |
45 | uint32_t min_message) | |
46 | : Message{MSG_MON_PING, HEAD_VERSION, COMPAT_VERSION}, | |
47 | op(o), stamp(s), tracker_bl(tbl), min_message_size(min_message) | |
48 | {} | |
49 | MMonPing(__u8 o, utime_t s, const bufferlist& tbl) | |
50 | : Message{MSG_MON_PING, HEAD_VERSION, COMPAT_VERSION}, | |
51 | op(o), stamp(s), tracker_bl(tbl) {} | |
52 | MMonPing() | |
53 | : Message{MSG_MON_PING, HEAD_VERSION, COMPAT_VERSION} | |
54 | {} | |
55 | private: | |
56 | ~MMonPing() final {} | |
57 | ||
58 | public: | |
59 | void decode_payload() override { | |
60 | auto p = payload.cbegin(); | |
61 | decode(op, p); | |
62 | decode(stamp, p); | |
63 | decode(tracker_bl, p); | |
64 | ||
65 | int payload_mid_length = p.get_off(); | |
66 | uint32_t size; | |
67 | decode(size, p); | |
68 | p += size; | |
69 | min_message_size = size + payload_mid_length; | |
70 | } | |
71 | void encode_payload(uint64_t features) override { | |
72 | using ceph::encode; | |
73 | encode(op, payload); | |
74 | encode(stamp, payload); | |
75 | encode(tracker_bl, payload); | |
76 | ||
77 | size_t s = 0; | |
78 | if (min_message_size > payload.length()) { | |
79 | s = min_message_size - payload.length(); | |
80 | } | |
81 | encode((uint32_t)s, payload); | |
82 | if (s) { | |
83 | // this should be big enough for normal min_message padding sizes. since | |
84 | // we are targeting jumbo ethernet frames around 9000 bytes, 16k should | |
85 | // be more than sufficient! the compiler will statically zero this so | |
86 | // that at runtime we are only adding a bufferptr reference to it. | |
87 | static char zeros[16384] = {}; | |
88 | while (s > sizeof(zeros)) { | |
89 | payload.append(buffer::create_static(sizeof(zeros), zeros)); | |
90 | s -= sizeof(zeros); | |
91 | } | |
92 | if (s) { | |
93 | payload.append(buffer::create_static(s, zeros)); | |
94 | } | |
95 | } | |
96 | } | |
97 | ||
98 | std::string_view get_type_name() const override { return "mon_ping"; } | |
20effc67 | 99 | void print(std::ostream& out) const override { |
f67539c2 TL |
100 | out << "mon_ping(" << get_op_name(op) |
101 | << " stamp " << stamp | |
102 | << ")"; | |
103 | } | |
104 | private: | |
105 | template<class T, typename... Args> | |
106 | friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args); | |
107 | }; | |
108 | ||
109 | #endif |