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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "replicated_backend.h"
#include "messages/MOSDRepOpReply.h"
#include "crimson/common/exception.h"
#include "crimson/common/log.h"
#include "crimson/os/futurized_store.h"
#include "crimson/osd/shard_services.h"
#include "osd/PeeringState.h"
namespace {
seastar::logger& logger() {
return crimson::get_logger(ceph_subsys_osd);
}
}
ReplicatedBackend::ReplicatedBackend(pg_t pgid,
pg_shard_t whoami,
ReplicatedBackend::CollectionRef coll,
crimson::osd::ShardServices& shard_services)
: PGBackend{whoami.shard, coll, &shard_services.get_store()},
pgid{pgid},
whoami{whoami},
shard_services{shard_services}
{}
ReplicatedBackend::ll_read_errorator::future<ceph::bufferlist>
ReplicatedBackend::_read(const hobject_t& hoid,
const uint64_t off,
const uint64_t len,
const uint32_t flags)
{
if (__builtin_expect(stopping, false)) {
throw crimson::common::system_shutdown_exception();
}
return store->read(coll, ghobject_t{hoid}, off, len, flags);
}
seastar::future<crimson::osd::acked_peers_t>
ReplicatedBackend::_submit_transaction(std::set<pg_shard_t>&& pg_shards,
const hobject_t& hoid,
ceph::os::Transaction&& txn,
const osd_op_params_t& osd_op_p,
epoch_t min_epoch, epoch_t map_epoch,
std::vector<pg_log_entry_t>&& log_entries)
{
if (__builtin_expect(stopping, false)) {
throw crimson::common::system_shutdown_exception();
}
if (__builtin_expect((bool)peering, false)) {
throw crimson::common::actingset_changed(peering->is_primary);
}
const ceph_tid_t tid = next_txn_id++;
auto req_id = osd_op_p.req->get_reqid();
auto pending_txn =
pending_trans.emplace(tid, pg_shards.size()).first;
bufferlist encoded_txn;
encode(txn, encoded_txn);
return seastar::parallel_for_each(std::move(pg_shards),
[=, encoded_txn=std::move(encoded_txn), txn=std::move(txn)]
(auto pg_shard) mutable {
if (pg_shard == whoami) {
return shard_services.get_store().do_transaction(coll,std::move(txn));
} else {
auto m = make_message<MOSDRepOp>(req_id, whoami,
spg_t{pgid, pg_shard.shard}, hoid,
CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK,
map_epoch, min_epoch,
tid, osd_op_p.at_version);
m->set_data(encoded_txn);
pending_txn->second.acked_peers.push_back({pg_shard, eversion_t{}});
encode(log_entries, m->logbl);
m->pg_trim_to = osd_op_p.pg_trim_to;
m->min_last_complete_ondisk = osd_op_p.min_last_complete_ondisk;
m->set_rollback_to(osd_op_p.at_version);
// TODO: set more stuff. e.g., pg_states
return shard_services.send_to_osd(pg_shard.osd, std::move(m), map_epoch);
}
}).then([this, peers=pending_txn->second.weak_from_this()] {
if (!peers) {
// for now, only actingset_changed can cause peers
// to be nullptr
assert(peering);
throw crimson::common::actingset_changed(peering->is_primary);
}
if (--peers->pending == 0) {
peers->all_committed.set_value();
peers->all_committed = {};
return seastar::now();
}
return peers->all_committed.get_future();
}).then([pending_txn, this] {
auto acked_peers = std::move(pending_txn->second.acked_peers);
pending_trans.erase(pending_txn);
return seastar::make_ready_future<crimson::osd::acked_peers_t>(std::move(acked_peers));
});
}
void ReplicatedBackend::on_actingset_changed(peering_info_t pi)
{
peering.emplace(pi);
crimson::common::actingset_changed e_actingset_changed{peering->is_primary};
for (auto& [tid, pending_txn] : pending_trans) {
pending_txn.all_committed.set_exception(e_actingset_changed);
}
pending_trans.clear();
}
void ReplicatedBackend::got_rep_op_reply(const MOSDRepOpReply& reply)
{
auto found = pending_trans.find(reply.get_tid());
if (found == pending_trans.end()) {
logger().warn("{}: no matched pending rep op: {}", __func__, reply);
return;
}
auto& peers = found->second;
for (auto& peer : peers.acked_peers) {
if (peer.shard == reply.from) {
peer.last_complete_ondisk = reply.get_last_complete_ondisk();
if (--peers.pending == 0) {
peers.all_committed.set_value();
peers.all_committed = {};
}
return;
}
}
}
seastar::future<> ReplicatedBackend::stop()
{
logger().info("ReplicatedBackend::stop {}", coll->get_cid());
stopping = true;
for (auto& [tid, pending_on] : pending_trans) {
pending_on.all_committed.set_exception(
crimson::common::system_shutdown_exception());
}
pending_trans.clear();
return seastar::now();
}
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