// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab

#ifndef CEPH_MOSDPGRECOVERYDELETE_H
#define CEPH_MOSDPGRECOVERYDELETE_H

#include "MOSDFastDispatchOp.h"

/*
 * instruct non-primary to remove some objects during recovery
 */

class MOSDPGRecoveryDelete final : public MOSDFastDispatchOp {
public:
  static constexpr int HEAD_VERSION = 2;
  static constexpr int COMPAT_VERSION = 1;

  pg_shard_t from;
  spg_t pgid;            ///< target spg_t
  epoch_t map_epoch, min_epoch;
  std::list<std::pair<hobject_t, eversion_t>> objects;    ///< objects to remove

private:
  uint64_t cost = 0;

public:
  int get_cost() const override {
    return cost;
  }

  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;
  }

  void set_cost(uint64_t c) {
    cost = c;
  }

  MOSDPGRecoveryDelete()
    : MOSDFastDispatchOp{MSG_OSD_PG_RECOVERY_DELETE, HEAD_VERSION,
			 COMPAT_VERSION}
  {}

  MOSDPGRecoveryDelete(pg_shard_t from, spg_t pgid, epoch_t map_epoch,
		       epoch_t min_epoch)
    : MOSDFastDispatchOp{MSG_OSD_PG_RECOVERY_DELETE, HEAD_VERSION,
			 COMPAT_VERSION},
      from(from),
      pgid(pgid),
      map_epoch(map_epoch),
      min_epoch(min_epoch)
  {}

private:
  ~MOSDPGRecoveryDelete() final {}

public:
  std::string_view get_type_name() const { return "recovery_delete"; }
  void print(std::ostream& out) const {
    out << "MOSDPGRecoveryDelete(" << pgid << " e" << map_epoch << ","
	<< min_epoch << " " << objects << ")";
  }

  void encode_payload(uint64_t features) {
    using ceph::encode;
    encode(from, payload);
    encode(pgid, payload);
    encode(map_epoch, payload);
    encode(min_epoch, payload);
    encode(cost, payload);
    encode(objects, payload);
  }
  void decode_payload() {
    using ceph::decode;
    auto p = payload.cbegin();
    decode(from, p);
    decode(pgid, p);
    decode(map_epoch, p);
    decode(min_epoch, p);
    decode(cost, p);
    decode(objects, p);
  }
private:
  template<class T, typename... Args>
  friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
};

#endif