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Diffstat (limited to 'src/messages/MClientReconnect.h')
| -rw-r--r-- | src/messages/MClientReconnect.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/messages/MClientReconnect.h b/src/messages/MClientReconnect.h new file mode 100644 index 00000000..ba3b0fb2 --- /dev/null +++ b/src/messages/MClientReconnect.h @@ -0,0 +1,174 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Ceph - scalable distributed file system + * + * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net> + * + * This is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software + * Foundation. See file COPYING. + * + */ + +#ifndef CEPH_MCLIENTRECONNECT_H +#define CEPH_MCLIENTRECONNECT_H + +#include "msg/Message.h" +#include "mds/mdstypes.h" +#include "include/ceph_features.h" + + +class MClientReconnect : public MessageInstance<MClientReconnect> { +public: + friend factory; +private: + static constexpr int HEAD_VERSION = 5; + static constexpr int COMPAT_VERSION = 4; + +public: + map<inodeno_t, cap_reconnect_t> caps; // only head inodes + vector<snaprealm_reconnect_t> realms; + bool more = false; + + MClientReconnect() : + MessageInstance(CEPH_MSG_CLIENT_RECONNECT, HEAD_VERSION, COMPAT_VERSION) {} +private: + ~MClientReconnect() override {} + + size_t cap_size = 0; + size_t realm_size = 0; + size_t approx_size = sizeof(__u32) + sizeof(__u32) + 1; + + void calc_item_size() { + using ceph::encode; + { + bufferlist bl; + inodeno_t ino; + cap_reconnect_t cr; + encode(ino, bl); + encode(cr, bl); + cap_size = bl.length(); + } + { + bufferlist bl; + snaprealm_reconnect_t sr; + encode(sr, bl); + realm_size = bl.length(); + } + } + +public: + std::string_view get_type_name() const override { return "client_reconnect"; } + void print(ostream& out) const override { + out << "client_reconnect(" + << caps.size() << " caps " << realms.size() << " realms )"; + } + + // Force to use old encoding. + // Use connection's features to choose encoding if version is set to 0. + void set_encoding_version(int v) { + header.version = v; + if (v <= 3) + header.compat_version = 0; + } + size_t get_approx_size() { + return approx_size; + } + void mark_more() { more = true; } + bool has_more() const { return more; } + + void add_cap(inodeno_t ino, uint64_t cap_id, inodeno_t pathbase, const string& path, + int wanted, int issued, inodeno_t sr, snapid_t sf, bufferlist& lb) + { + caps[ino] = cap_reconnect_t(cap_id, pathbase, path, wanted, issued, sr, sf, lb); + if (!cap_size) + calc_item_size(); + approx_size += cap_size + path.length() + lb.length(); + } + void add_snaprealm(inodeno_t ino, snapid_t seq, inodeno_t parent) { + snaprealm_reconnect_t r; + r.realm.ino = ino; + r.realm.seq = seq; + r.realm.parent = parent; + realms.push_back(r); + if (!realm_size) + calc_item_size(); + approx_size += realm_size; + } + + void encode_payload(uint64_t features) override { + if (header.version == 0) { + if (features & CEPH_FEATURE_MDSENC) + header.version = 3; + else if (features & CEPH_FEATURE_FLOCK) + header.version = 2; + else + header.version = 1; + } + + using ceph::encode; + data.clear(); + + if (header.version >= 4) { + encode(caps, data); + encode(realms, data); + encode(more, data); + } else { + // compat crap + if (header.version == 3) { + encode(caps, data); + } else if (header.version == 2) { + __u32 n = caps.size(); + encode(n, data); + for (auto& p : caps) { + encode(p.first, data); + p.second.encode_old(data); + } + } else { + map<inodeno_t, old_cap_reconnect_t> ocaps; + for (auto& p : caps) { + ocaps[p.first] = p.second; + encode(ocaps, data); + } + for (auto& r : realms) + r.encode_old(data); + } + } + } + void decode_payload() override { + auto p = data.cbegin(); + if (header.version >= 4) { + decode(caps, p); + decode(realms, p); + if (header.version >= 5) + decode(more, p); + } else { + // compat crap + if (header.version == 3) { + decode(caps, p); + } else if (header.version == 2) { + __u32 n; + decode(n, p); + inodeno_t ino; + while (n--) { + decode(ino, p); + caps[ino].decode_old(p); + } + } else { + map<inodeno_t, old_cap_reconnect_t> ocaps; + decode(ocaps, p); + for (auto &q : ocaps) + caps[q.first] = q.second; + } + while (!p.end()) { + realms.push_back(snaprealm_reconnect_t()); + realms.back().decode_old(p); + } + } + } +}; + + +#endif |