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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include <seastar/core/future.hh>
#include <seastar/core/sleep.hh>
#include "messages/MOSDOp.h"
#include "crimson/osd/pg.h"
#include "crimson/osd/shard_services.h"
#include "common/Formatter.h"
#include "crimson/osd/osd_operation_external_tracking.h"
#include "crimson/osd/osd_operations/background_recovery.h"
namespace {
seastar::logger& logger() {
return crimson::get_logger(ceph_subsys_osd);
}
}
namespace crimson {
template <>
struct EventBackendRegistry<osd::UrgentRecovery> {
static std::tuple<> get_backends() {
return {};
}
};
template <>
struct EventBackendRegistry<osd::PglogBasedRecovery> {
static std::tuple<> get_backends() {
return {};
}
};
}
namespace crimson::osd {
template <class T>
BackgroundRecoveryT<T>::BackgroundRecoveryT(
Ref<PG> pg,
ShardServices &ss,
epoch_t epoch_started,
crimson::osd::scheduler::scheduler_class_t scheduler_class,
float delay)
: pg(pg),
epoch_started(epoch_started),
delay(delay),
ss(ss),
scheduler_class(scheduler_class)
{}
template <class T>
void BackgroundRecoveryT<T>::print(std::ostream &lhs) const
{
lhs << "BackgroundRecovery(" << pg->get_pgid() << ")";
}
template <class T>
void BackgroundRecoveryT<T>::dump_detail(Formatter *f) const
{
f->dump_stream("pgid") << pg->get_pgid();
f->open_object_section("recovery_detail");
{
// TODO pg->dump_recovery_state(f);
}
f->close_section();
}
template <class T>
seastar::future<> BackgroundRecoveryT<T>::start()
{
logger().debug("{}: start", *this);
typename T::IRef ref = static_cast<T*>(this);
auto maybe_delay = seastar::now();
if (delay) {
maybe_delay = seastar::sleep(
std::chrono::milliseconds(std::lround(delay * 1000)));
}
return maybe_delay.then([ref, this] {
return this->template with_blocking_event<OperationThrottler::BlockingEvent>(
[ref, this] (auto&& trigger) {
return ss.with_throttle_while(
std::move(trigger),
this, get_scheduler_params(), [this] {
return T::interruptor::with_interruption([this] {
return do_recovery();
}, [](std::exception_ptr) {
return seastar::make_ready_future<bool>(false);
}, pg);
}).handle_exception_type([ref, this](const std::system_error& err) {
if (err.code() == std::make_error_code(std::errc::interrupted)) {
logger().debug("{} recovery interruped: {}", *pg, err.what());
return seastar::now();
}
return seastar::make_exception_future<>(err);
});
});
});
}
UrgentRecovery::UrgentRecovery(
const hobject_t& soid,
const eversion_t& need,
Ref<PG> pg,
ShardServices& ss,
epoch_t epoch_started)
: BackgroundRecoveryT{pg, ss, epoch_started,
crimson::osd::scheduler::scheduler_class_t::immediate},
soid{soid}, need(need)
{
}
UrgentRecovery::interruptible_future<bool>
UrgentRecovery::do_recovery()
{
logger().debug("{}: {}", __func__, *this);
if (!pg->has_reset_since(epoch_started)) {
return with_blocking_event<RecoveryBackend::RecoveryBlockingEvent,
interruptor>([this] (auto&& trigger) {
return pg->get_recovery_handler()->recover_missing(trigger, soid, need);
}).then_interruptible([] {
return seastar::make_ready_future<bool>(false);
});
}
return seastar::make_ready_future<bool>(false);
}
void UrgentRecovery::print(std::ostream &lhs) const
{
lhs << "UrgentRecovery(" << pg->get_pgid() << ", "
<< soid << ", v" << need << ", epoch_started: "
<< epoch_started << ")";
}
void UrgentRecovery::dump_detail(Formatter *f) const
{
f->dump_stream("pgid") << pg->get_pgid();
f->open_object_section("recovery_detail");
{
f->dump_stream("oid") << soid;
f->dump_stream("version") << need;
}
f->close_section();
}
PglogBasedRecovery::PglogBasedRecovery(
Ref<PG> pg,
ShardServices &ss,
const epoch_t epoch_started,
float delay)
: BackgroundRecoveryT(
std::move(pg),
ss,
epoch_started,
crimson::osd::scheduler::scheduler_class_t::background_recovery,
delay)
{}
PglogBasedRecovery::interruptible_future<bool>
PglogBasedRecovery::do_recovery()
{
if (pg->has_reset_since(epoch_started)) {
return seastar::make_ready_future<bool>(false);
}
return with_blocking_event<RecoveryBackend::RecoveryBlockingEvent,
interruptor>([this] (auto&& trigger) {
return pg->get_recovery_handler()->start_recovery_ops(
trigger,
crimson::common::local_conf()->osd_recovery_max_single_start);
});
}
PGPeeringPipeline &BackfillRecovery::peering_pp(PG &pg)
{
return pg.peering_request_pg_pipeline;
}
BackfillRecovery::interruptible_future<bool>
BackfillRecovery::do_recovery()
{
logger().debug("{}", __func__);
if (pg->has_reset_since(epoch_started)) {
logger().debug("{}: pg got reset since epoch_started={}",
__func__, epoch_started);
return seastar::make_ready_future<bool>(false);
}
// TODO: limits
return enter_stage<interruptor>(
// process_event() of our boost::statechart machine is non-reentrant.
// with the backfill_pipeline we protect it from a second entry from
// the implementation of BackfillListener.
// additionally, this stage serves to synchronize with PeeringEvent.
peering_pp(*pg).process
).then_interruptible([this] {
pg->get_recovery_handler()->dispatch_backfill_event(std::move(evt));
return seastar::make_ready_future<bool>(false);
});
}
template class BackgroundRecoveryT<UrgentRecovery>;
template class BackgroundRecoveryT<PglogBasedRecovery>;
template class BackgroundRecoveryT<BackfillRecovery>;
} // namespace crimson::osd
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