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// -*- 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_MOSDREPOP_H
#define CEPH_MOSDREPOP_H
#include "MOSDFastDispatchOp.h"
/*
* OSD sub op - for internal ops on pobjects between primary and replicas(/stripes/whatever)
*/
class MOSDRepOp final : public MOSDFastDispatchOp {
private:
static constexpr int HEAD_VERSION = 3;
static constexpr int COMPAT_VERSION = 1;
public:
epoch_t map_epoch, min_epoch;
// metadata from original request
osd_reqid_t reqid;
spg_t pgid;
ceph::buffer::list::const_iterator p;
// Decoding flags. Decoding is only needed for messages caught by pipe reader.
bool final_decode_needed;
// subop
pg_shard_t from;
hobject_t poid;
__u8 acks_wanted;
// transaction to exec
ceph::buffer::list logbl;
pg_stat_t pg_stats;
// subop metadata
eversion_t version;
// piggybacked osd/og state
eversion_t pg_trim_to; // primary->replica: trim to here
eversion_t min_last_complete_ondisk; // lower bound on committed version
hobject_t new_temp_oid; ///< new temp object that we must now start tracking
hobject_t discard_temp_oid; ///< previously used temp object that we can now stop tracking
/// non-empty if this transaction involves a hit_set history update
std::optional<pg_hit_set_history_t> updated_hit_set_history;
epoch_t get_map_epoch() const override {
return map_epoch;
}
epoch_t get_min_epoch() const override {
return min_epoch;
}
spg_t get_spg() const override {
return pgid;
}
int get_cost() const override {
return data.length();
}
void decode_payload() override {
using ceph::decode;
p = payload.cbegin();
// split to partial and final
decode(map_epoch, p);
if (header.version >= 2) {
decode(min_epoch, p);
decode_trace(p);
} else {
min_epoch = map_epoch;
}
decode(reqid, p);
decode(pgid, p);
}
void finish_decode() {
using ceph::decode;
if (!final_decode_needed)
return; // Message is already final decoded
decode(poid, p);
decode(acks_wanted, p);
decode(version, p);
decode(logbl, p);
decode(pg_stats, p);
decode(pg_trim_to, p);
decode(new_temp_oid, p);
decode(discard_temp_oid, p);
decode(from, p);
decode(updated_hit_set_history, p);
if (header.version >= 3) {
decode(min_last_complete_ondisk, p);
} else {
/* This field used to mean pg_roll_foward_to, but ReplicatedBackend
* simply assumes that we're rolling foward to version. */
eversion_t pg_roll_forward_to;
decode(pg_roll_forward_to, p);
}
final_decode_needed = false;
}
void encode_payload(uint64_t features) override {
using ceph::encode;
encode(map_epoch, payload);
if (HAVE_FEATURE(features, SERVER_LUMINOUS)) {
header.version = HEAD_VERSION;
encode(min_epoch, payload);
encode_trace(payload, features);
} else {
header.version = 1;
}
encode(reqid, payload);
encode(pgid, payload);
encode(poid, payload);
encode(acks_wanted, payload);
encode(version, payload);
encode(logbl, payload);
encode(pg_stats, payload);
encode(pg_trim_to, payload);
encode(new_temp_oid, payload);
encode(discard_temp_oid, payload);
encode(from, payload);
encode(updated_hit_set_history, payload);
encode(min_last_complete_ondisk, payload);
}
MOSDRepOp()
: MOSDFastDispatchOp{MSG_OSD_REPOP, HEAD_VERSION, COMPAT_VERSION},
map_epoch(0),
final_decode_needed(true), acks_wanted (0) {}
MOSDRepOp(osd_reqid_t r, pg_shard_t from,
spg_t p, const hobject_t& po, int aw,
epoch_t mape, epoch_t min_epoch, ceph_tid_t rtid, eversion_t v)
: MOSDFastDispatchOp{MSG_OSD_REPOP, HEAD_VERSION, COMPAT_VERSION},
map_epoch(mape),
min_epoch(min_epoch),
reqid(r),
pgid(p),
final_decode_needed(false),
from(from),
poid(po),
acks_wanted(aw),
version(v) {
set_tid(rtid);
}
void set_rollback_to(const eversion_t &rollback_to) {
header.version = 2;
min_last_complete_ondisk = rollback_to;
}
private:
~MOSDRepOp() final {}
public:
std::string_view get_type_name() const override { return "osd_repop"; }
void print(std::ostream& out) const override {
out << "osd_repop(" << reqid
<< " " << pgid << " e" << map_epoch << "/" << min_epoch;
if (!final_decode_needed) {
out << " " << poid << " v " << version;
if (updated_hit_set_history)
out << ", has_updated_hit_set_history";
if (header.version < 3) {
out << ", rollback_to(legacy)=" << min_last_complete_ondisk;
} else {
out << ", mlcod=" << min_last_complete_ondisk;
}
}
out << ")";
}
private:
template<class T, typename... Args>
friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
};
#endif
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