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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net> | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
15 | #ifndef CEPH_MCLIENTSESSION_H | |
16 | #define CEPH_MCLIENTSESSION_H | |
17 | ||
18 | #include "msg/Message.h" | |
11fdf7f2 | 19 | #include "mds/mdstypes.h" |
7c673cae | 20 | |
9f95a23c | 21 | class MClientSession : public SafeMessage { |
11fdf7f2 | 22 | private: |
9f95a23c | 23 | static constexpr int HEAD_VERSION = 4; |
11fdf7f2 | 24 | static constexpr int COMPAT_VERSION = 1; |
7c673cae FG |
25 | |
26 | public: | |
27 | ceph_mds_session_head head; | |
28 | ||
11fdf7f2 TL |
29 | std::map<std::string, std::string> metadata; |
30 | feature_bitset_t supported_features; | |
9f95a23c | 31 | metric_spec_t metric_spec; |
7c673cae FG |
32 | |
33 | int get_op() const { return head.op; } | |
34 | version_t get_seq() const { return head.seq; } | |
35 | utime_t get_stamp() const { return utime_t(head.stamp); } | |
36 | int get_max_caps() const { return head.max_caps; } | |
37 | int get_max_leases() const { return head.max_leases; } | |
38 | ||
11fdf7f2 | 39 | protected: |
9f95a23c | 40 | MClientSession() : SafeMessage{CEPH_MSG_CLIENT_SESSION, HEAD_VERSION, COMPAT_VERSION} { } |
7c673cae | 41 | MClientSession(int o, version_t s=0) : |
9f95a23c | 42 | SafeMessage{CEPH_MSG_CLIENT_SESSION, HEAD_VERSION, COMPAT_VERSION} { |
7c673cae FG |
43 | memset(&head, 0, sizeof(head)); |
44 | head.op = o; | |
45 | head.seq = s; | |
46 | } | |
47 | MClientSession(int o, utime_t st) : | |
9f95a23c | 48 | SafeMessage{CEPH_MSG_CLIENT_SESSION, HEAD_VERSION, COMPAT_VERSION} { |
7c673cae FG |
49 | memset(&head, 0, sizeof(head)); |
50 | head.op = o; | |
51 | head.seq = 0; | |
52 | st.encode_timeval(&head.stamp); | |
53 | } | |
7c673cae FG |
54 | ~MClientSession() override {} |
55 | ||
56 | public: | |
11fdf7f2 | 57 | std::string_view get_type_name() const override { return "client_session"; } |
7c673cae FG |
58 | void print(ostream& out) const override { |
59 | out << "client_session(" << ceph_session_op_name(get_op()); | |
60 | if (get_seq()) | |
61 | out << " seq " << get_seq(); | |
62 | if (get_op() == CEPH_SESSION_RECALL_STATE) | |
63 | out << " max_caps " << head.max_caps << " max_leases " << head.max_leases; | |
64 | out << ")"; | |
65 | } | |
66 | ||
67 | void decode_payload() override { | |
11fdf7f2 TL |
68 | auto p = payload.cbegin(); |
69 | decode(head, p); | |
70 | if (header.version >= 2) | |
71 | decode(metadata, p); | |
72 | if (header.version >= 3) | |
73 | decode(supported_features, p); | |
9f95a23c TL |
74 | if (header.version >= 4) { |
75 | decode(metric_spec, p); | |
76 | } | |
7c673cae FG |
77 | } |
78 | void encode_payload(uint64_t features) override { | |
11fdf7f2 TL |
79 | using ceph::encode; |
80 | encode(head, payload); | |
81 | if (metadata.empty() && supported_features.empty()) { | |
7c673cae FG |
82 | // If we're not trying to send any metadata (always the case if |
83 | // we are a server) then send older-format message to avoid upsetting | |
84 | // old kernel clients. | |
85 | header.version = 1; | |
86 | } else { | |
7c673cae | 87 | header.version = HEAD_VERSION; |
11fdf7f2 TL |
88 | encode(metadata, payload); |
89 | encode(supported_features, payload); | |
9f95a23c | 90 | encode(metric_spec, payload); |
7c673cae | 91 | } |
7c673cae | 92 | } |
9f95a23c TL |
93 | private: |
94 | template<class T, typename... Args> | |
95 | friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args); | |
7c673cae FG |
96 | }; |
97 | ||
98 | #endif |