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Diffstat (limited to 'src/messages/MOSDMap.h')
| -rw-r--r-- | src/messages/MOSDMap.h | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/messages/MOSDMap.h b/src/messages/MOSDMap.h new file mode 100644 index 00000000..9a5062c6 --- /dev/null +++ b/src/messages/MOSDMap.h @@ -0,0 +1,173 @@ +// -*- 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_MOSDMAP_H +#define CEPH_MOSDMAP_H + +#include "msg/Message.h" +#include "osd/OSDMap.h" +#include "include/ceph_features.h" + +class MOSDMap : public MessageInstance<MOSDMap> { +public: + friend factory; +private: + static constexpr int HEAD_VERSION = 4; + static constexpr int COMPAT_VERSION = 3; + + public: + uuid_d fsid; + uint64_t encode_features = 0; + map<epoch_t, bufferlist> maps; + map<epoch_t, bufferlist> incremental_maps; + epoch_t oldest_map =0, newest_map = 0; + + // if we are fetching maps from the mon and have to jump a gap + // (client's next needed map is older than mon's oldest) we can + // share removed snaps from the gap here. + mempool::osdmap::map<int64_t,OSDMap::snap_interval_set_t> gap_removed_snaps; + + epoch_t get_first() const { + epoch_t e = 0; + map<epoch_t, bufferlist>::const_iterator i = maps.begin(); + if (i != maps.end()) e = i->first; + i = incremental_maps.begin(); + if (i != incremental_maps.end() && + (e == 0 || i->first < e)) e = i->first; + return e; + } + epoch_t get_last() const { + epoch_t e = 0; + map<epoch_t, bufferlist>::const_reverse_iterator i = maps.rbegin(); + if (i != maps.rend()) e = i->first; + i = incremental_maps.rbegin(); + if (i != incremental_maps.rend() && + (e == 0 || i->first > e)) e = i->first; + return e; + } + epoch_t get_oldest() { + return oldest_map; + } + epoch_t get_newest() { + return newest_map; + } + + + MOSDMap() : MessageInstance(CEPH_MSG_OSD_MAP, HEAD_VERSION, COMPAT_VERSION) { } + MOSDMap(const uuid_d &f, const uint64_t features) + : MessageInstance(CEPH_MSG_OSD_MAP, HEAD_VERSION, COMPAT_VERSION), + fsid(f), encode_features(features), + oldest_map(0), newest_map(0) { } +private: + ~MOSDMap() override {} +public: + // marshalling + void decode_payload() override { + auto p = payload.cbegin(); + decode(fsid, p); + decode(incremental_maps, p); + decode(maps, p); + if (header.version >= 2) { + decode(oldest_map, p); + decode(newest_map, p); + } else { + oldest_map = 0; + newest_map = 0; + } + if (header.version >= 4) { + decode(gap_removed_snaps, p); + } + } + void encode_payload(uint64_t features) override { + using ceph::encode; + header.version = HEAD_VERSION; + header.compat_version = COMPAT_VERSION; + encode(fsid, payload); + if (OSDMap::get_significant_features(encode_features) != + OSDMap::get_significant_features(features)) { + if ((features & CEPH_FEATURE_PGID64) == 0 || + (features & CEPH_FEATURE_PGPOOL3) == 0) { + header.version = 1; // old old_client version + header.compat_version = 1; + } else if ((features & CEPH_FEATURE_OSDENC) == 0) { + header.version = 2; // old pg_pool_t + header.compat_version = 2; + } + + // reencode maps using old format + // + // FIXME: this can probably be done more efficiently higher up + // the stack, or maybe replaced with something that only + // includes the pools the client cares about. + for (map<epoch_t,bufferlist>::iterator p = incremental_maps.begin(); + p != incremental_maps.end(); + ++p) { + OSDMap::Incremental inc; + auto q = p->second.cbegin(); + inc.decode(q); + // always encode with subset of osdmaps canonical features + uint64_t f = inc.encode_features & features; + p->second.clear(); + if (inc.fullmap.length()) { + // embedded full map? + OSDMap m; + m.decode(inc.fullmap); + inc.fullmap.clear(); + m.encode(inc.fullmap, f | CEPH_FEATURE_RESERVED); + } + if (inc.crush.length()) { + // embedded crush map + CrushWrapper c; + auto p = inc.crush.cbegin(); + c.decode(p); + inc.crush.clear(); + c.encode(inc.crush, f); + } + inc.encode(p->second, f | CEPH_FEATURE_RESERVED); + } + for (map<epoch_t,bufferlist>::iterator p = maps.begin(); + p != maps.end(); + ++p) { + OSDMap m; + m.decode(p->second); + // always encode with subset of osdmaps canonical features + uint64_t f = m.get_encoding_features() & features; + p->second.clear(); + m.encode(p->second, f | CEPH_FEATURE_RESERVED); + } + } + encode(incremental_maps, payload); + encode(maps, payload); + if (header.version >= 2) { + encode(oldest_map, payload); + encode(newest_map, payload); + } + if (header.version >= 4) { + encode(gap_removed_snaps, payload); + } + } + + std::string_view get_type_name() const override { return "osdmap"; } + void print(ostream& out) const override { + out << "osd_map(" << get_first() << ".." << get_last(); + if (oldest_map || newest_map) + out << " src has " << oldest_map << ".." << newest_map; + if (!gap_removed_snaps.empty()) + out << " +gap_removed_snaps"; + out << ")"; + } +}; + +#endif |