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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 "messages/MOSDOp.h"
#include "messages/MOSDOpReply.h"
#include "crimson/common/exception.h"
#include "crimson/osd/pg.h"
#include "crimson/osd/osd.h"
#include "common/Formatter.h"
#include "crimson/osd/osd_operations/client_request.h"
#include "crimson/osd/osd_connection_priv.h"
namespace {
seastar::logger& logger() {
return crimson::get_logger(ceph_subsys_osd);
}
}
namespace crimson::osd {
ClientRequest::ClientRequest(
OSD &osd, crimson::net::ConnectionRef conn, Ref<MOSDOp> &&m)
: osd(osd), conn(conn), m(m)
{}
void ClientRequest::print(std::ostream &lhs) const
{
lhs << *m;
}
void ClientRequest::dump_detail(Formatter *f) const
{
}
ClientRequest::ConnectionPipeline &ClientRequest::cp()
{
return get_osd_priv(conn.get()).client_request_conn_pipeline;
}
ClientRequest::PGPipeline &ClientRequest::pp(PG &pg)
{
return pg.client_request_pg_pipeline;
}
bool ClientRequest::is_pg_op() const
{
return std::any_of(
begin(m->ops), end(m->ops),
[](auto& op) { return ceph_osd_op_type_pg(op.op.op); });
}
seastar::future<> ClientRequest::start()
{
logger().debug("{}: start", *this);
IRef opref = this;
return crimson::common::handle_system_shutdown(
[this, opref=std::move(opref)]() mutable {
return seastar::repeat([this, opref]() mutable {
return with_blocking_future(handle.enter(cp().await_map))
.then([this]() {
return with_blocking_future(osd.osdmap_gate.wait_for_map(m->get_min_epoch()));
}).then([this](epoch_t epoch) {
return with_blocking_future(handle.enter(cp().get_pg));
}).then([this] {
return with_blocking_future(osd.wait_for_pg(m->get_spg()));
}).then([this, opref](Ref<PG> pgref) {
PG &pg = *pgref;
if (pg.can_discard_op(*m)) {
return osd.send_incremental_map(conn, m->get_map_epoch());
}
return with_blocking_future(
handle.enter(pp(pg).await_map)
).then([this, &pg]() mutable {
return with_blocking_future(
pg.osdmap_gate.wait_for_map(m->get_min_epoch()));
}).then([this, &pg](auto map) mutable {
return with_blocking_future(
handle.enter(pp(pg).wait_for_active));
}).then([this, &pg]() mutable {
return with_blocking_future(pg.wait_for_active_blocker.wait());
}).then([this, pgref=std::move(pgref)]() mutable {
if (m->finish_decode()) {
m->clear_payload();
}
if (is_pg_op()) {
return process_pg_op(pgref);
} else {
return process_op(pgref);
}
});
}).then([] {
return seastar::stop_iteration::yes;
}).handle_exception_type([](crimson::common::actingset_changed& e) {
if (e.is_primary()) {
logger().debug("operation restart, acting set changed");
return seastar::stop_iteration::no;
} else {
logger().debug("operation abort, up primary changed");
return seastar::stop_iteration::yes;
}
});
});
});
}
seastar::future<> ClientRequest::process_pg_op(
Ref<PG> &pg)
{
return pg->do_pg_ops(m)
.then([this, pg=std::move(pg)](Ref<MOSDOpReply> reply) {
return conn->send(reply);
});
}
seastar::future<> ClientRequest::process_op(
Ref<PG> &pgref)
{
PG& pg = *pgref;
return with_blocking_future(
handle.enter(pp(pg).recover_missing)
).then([this, &pg, pgref] {
eversion_t ver;
const hobject_t& soid = m->get_hobj();
logger().debug("{} check for recovery, {}", *this, soid);
if (pg.is_unreadable_object(soid, &ver) ||
pg.is_degraded_or_backfilling_object(soid)) {
logger().debug("{} need to wait for recovery, {}", *this, soid);
if (pg.get_recovery_backend()->is_recovering(soid)) {
return pg.get_recovery_backend()->get_recovering(soid).wait_for_recovered();
} else {
auto [op, fut] = osd.get_shard_services().start_operation<UrgentRecovery>(
soid, ver, pgref, osd.get_shard_services(), pg.get_osdmap_epoch());
return std::move(fut);
}
}
return seastar::now();
}).then([this, &pg] {
return with_blocking_future(handle.enter(pp(pg).get_obc));
}).then([this, &pg]() -> PG::load_obc_ertr::future<> {
op_info.set_from_op(&*m, *pg.get_osdmap());
return pg.with_locked_obc(m, op_info, this, [this, &pg](auto obc) {
return with_blocking_future(
handle.enter(pp(pg).process)
).then([this, &pg, obc] {
if (!pg.is_primary()) {
// primary can handle both normal ops and balanced reads
if (is_misdirected(pg)) {
logger().trace("process_op: dropping misdirected op");
return seastar::make_ready_future<Ref<MOSDOpReply>>();
} else if (const hobject_t& hoid = m->get_hobj();
!pg.get_peering_state().can_serve_replica_read(hoid)) {
auto reply = make_message<MOSDOpReply>(
m.get(), -EAGAIN, pg.get_osdmap_epoch(),
m->get_flags() & (CEPH_OSD_FLAG_ACK|CEPH_OSD_FLAG_ONDISK),
!m->has_flag(CEPH_OSD_FLAG_RETURNVEC));
return seastar::make_ready_future<Ref<MOSDOpReply>>(std::move(reply));
}
}
return pg.do_osd_ops(m, obc, op_info);
}).then([this](Ref<MOSDOpReply> reply) {
if (reply) {
return conn->send(std::move(reply));
} else {
return seastar::now();
}
});
});
}).safe_then([pgref=std::move(pgref)] {
return seastar::now();
}, PG::load_obc_ertr::all_same_way([](auto &code) {
logger().error("ClientRequest saw error code {}", code);
return seastar::now();
}));
}
bool ClientRequest::is_misdirected(const PG& pg) const
{
// otherwise take a closer look
if (const int flags = m->get_flags();
flags & CEPH_OSD_FLAG_BALANCE_READS ||
flags & CEPH_OSD_FLAG_LOCALIZE_READS) {
if (!op_info.may_read()) {
// no read found, so it can't be balanced read
return true;
}
if (op_info.may_write() || op_info.may_cache()) {
// write op, but i am not primary
return true;
}
// balanced reads; any replica will do
return pg.is_nonprimary();
}
// neither balanced nor localize reads
return true;
}
}
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