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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#pragma once
#include <map>
#include <memory>
#include <string>
#include <boost/smart_ptr/local_shared_ptr.hpp>
#include "crimson/os/futurized_store.h"
#include "crimson/os/futurized_collection.h"
#include "crimson/osd/acked_peers.h"
#include "crimson/common/shared_lru.h"
#include "messages/MOSDOp.h"
#include "messages/MOSDOpReply.h"
#include "os/Transaction.h"
#include "osd/osd_types.h"
#include "osd/osd_internal_types.h"
struct hobject_t;
namespace ceph::os {
class Transaction;
}
namespace crimson::osd {
class ShardServices;
}
class PGBackend
{
protected:
using CollectionRef = crimson::os::CollectionRef;
using ec_profile_t = std::map<std::string, std::string>;
// low-level read errorator
using ll_read_errorator = crimson::os::FuturizedStore::read_errorator;
public:
PGBackend(shard_id_t shard, CollectionRef coll, crimson::os::FuturizedStore* store);
virtual ~PGBackend() = default;
static std::unique_ptr<PGBackend> create(pg_t pgid,
const pg_shard_t pg_shard,
const pg_pool_t& pool,
crimson::os::CollectionRef coll,
crimson::osd::ShardServices& shard_services,
const ec_profile_t& ec_profile);
using cached_os_t = boost::local_shared_ptr<ObjectState>;
using get_os_errorator = crimson::errorator<crimson::ct_error::enoent>;
get_os_errorator::future<cached_os_t> get_object_state(const hobject_t& oid);
seastar::future<> evict_object_state(const hobject_t& oid);
using read_errorator = ll_read_errorator::extend<
crimson::ct_error::input_output_error,
crimson::ct_error::object_corrupted>;
read_errorator::future<ceph::bufferlist> read(
const object_info_t& oi,
uint64_t off,
uint64_t len,
size_t truncate_size,
uint32_t truncate_seq,
uint32_t flags);
using stat_errorator = crimson::errorator<crimson::ct_error::enoent>;
stat_errorator::future<> stat(
const ObjectState& os,
OSDOp& osd_op);
seastar::future<> create(
ObjectState& os,
const OSDOp& osd_op,
ceph::os::Transaction& trans);
seastar::future<> remove(
ObjectState& os,
ceph::os::Transaction& txn);
seastar::future<> write(
ObjectState& os,
const OSDOp& osd_op,
ceph::os::Transaction& trans);
seastar::future<> writefull(
ObjectState& os,
const OSDOp& osd_op,
ceph::os::Transaction& trans);
seastar::future<crimson::osd::acked_peers_t> mutate_object(
std::set<pg_shard_t> pg_shards,
cached_os_t&& os,
ceph::os::Transaction&& txn,
const MOSDOp& m,
epoch_t min_epoch,
epoch_t map_epoch,
eversion_t ver);
seastar::future<std::vector<hobject_t>, hobject_t> list_objects(
const hobject_t& start,
uint64_t limit) const;
seastar::future<> setxattr(
ObjectState& os,
const OSDOp& osd_op,
ceph::os::Transaction& trans);
using get_attr_errorator = crimson::os::FuturizedStore::get_attr_errorator;
get_attr_errorator::future<> getxattr(
const ObjectState& os,
OSDOp& osd_op) const;
get_attr_errorator::future<ceph::bufferptr> getxattr(
const hobject_t& soid,
std::string_view key) const;
// OMAP
seastar::future<> omap_get_keys(
const ObjectState& os,
OSDOp& osd_op) const;
seastar::future<> omap_get_vals(
const ObjectState& os,
OSDOp& osd_op) const;
seastar::future<> omap_get_vals_by_keys(
const ObjectState& os,
OSDOp& osd_op) const;
seastar::future<> omap_set_vals(
ObjectState& os,
const OSDOp& osd_op,
ceph::os::Transaction& trans);
virtual void got_rep_op_reply(const MOSDRepOpReply&) {}
protected:
const shard_id_t shard;
CollectionRef coll;
crimson::os::FuturizedStore* store;
private:
using cached_ss_t = boost::local_shared_ptr<SnapSet>;
SharedLRU<hobject_t, SnapSet> ss_cache;
get_os_errorator::future<cached_ss_t> _load_ss(const hobject_t& oid);
SharedLRU<hobject_t, ObjectState> os_cache;
get_os_errorator::future<cached_os_t> _load_os(const hobject_t& oid);
virtual ll_read_errorator::future<ceph::bufferlist> _read(
const hobject_t& hoid,
size_t offset,
size_t length,
uint32_t flags) = 0;
bool maybe_create_new_object(ObjectState& os, ceph::os::Transaction& txn);
virtual seastar::future<crimson::osd::acked_peers_t>
_submit_transaction(std::set<pg_shard_t>&& pg_shards,
const hobject_t& hoid,
ceph::os::Transaction&& txn,
osd_reqid_t req_id,
epoch_t min_epoch, epoch_t max_epoch,
eversion_t ver) = 0;
};
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