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e8f3d7dd133baba94de2771f0f876908e1b3bc0b
scylladb/transport/server.hh
Nadav Har'El fa7a302130 cross-tree: split coordinator_result from exceptions.hh 
Recently, coordinator_result was introduced as an alternative for
exceptions. It was placed in the main "exceptions/exceptions.hh" header,
which virtually every single source file in Scylla includes.
But unfortunately, it brings in some heavy header files and templates,
leading to a lot of wasted build time - ClangBuildAnalyzer measured that
we include exceptions.hh in 323 source files, taking almost two seconds
each on average.

In this patch, we split the coordinator_result feature into a separate
header file, "exceptions/coordinator_result", and only the few places
which need it include the header file. Unfortunately, some of these
few places are themselves header, so the new header file ends up being
included in 100 source files - but 100 is still much less than 323 and
perhaps we can reduce this number 100 later.

After this patch, the total Scylla object-file size is reduced by 6.5%
(the object size is a proxy for build time, which I didn't directly
measure). ClangBuildAnalyzer reports that now each of the 323 includes
of exceptions.hh only takes 80ms, coordinator_result.hh is only included
100 times, and virtually all the cost to include it comes from Boost's
result.hh (400ms per inclusion).

Signed-off-by: Nadav Har'El <nyh@scylladb.com>
Message-Id: <20220228204323.1427012-1-nyh@scylladb.com>
2022-03-02 10:12:57 +02:00

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/*
* Copyright (C) 2015-present ScyllaDB
*/
/*
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#pragma once
#include "auth/service.hh"
#include <seastar/core/seastar.hh>
#include "service/endpoint_lifecycle_subscriber.hh"
#include "service/migration_listener.hh"
#include "auth/authenticator.hh"
#include <seastar/core/distributed.hh>
#include "timeout_config.hh"
#include <seastar/core/semaphore.hh>
#include <memory>
#include <boost/intrusive/list.hpp>
#include <seastar/net/tls.hh>
#include <seastar/core/metrics_registration.hh>
#include "utils/fragmented_temporary_buffer.hh"
#include "service_permit.hh"
#include <seastar/core/sharded.hh>
#include <seastar/core/execution_stage.hh>
#include "utils/updateable_value.hh"
#include "generic_server.hh"
#include "service/query_state.hh"
#include "cql3/query_options.hh"
#include "transport/messages/result_message.hh"
#include "utils/chunked_vector.hh"
#include "exceptions/coordinator_result.hh"
namespace cql3 {
class query_processor;
}
namespace scollectd {
class registrations;
}
namespace service {
class memory_limiter;
}
enum class client_type;
struct client_data;
namespace qos {
class service_level_controller;
} // namespace qos
namespace gms {
class gossiper;
}
namespace cql_transport {
class request_reader;
class response;
enum class cql_compression {
none,
lz4,
snappy,
};
enum cql_frame_flags {
compression = 0x01,
tracing = 0x02,
warning = 0x08,
};
struct [[gnu::packed]] cql_binary_frame_v1 {
uint8_t version;
uint8_t flags;
uint8_t stream;
uint8_t opcode;
net::packed<uint32_t> length;
template <typename Adjuster>
void adjust_endianness(Adjuster a) {
return a(length);
}
};
struct [[gnu::packed]] cql_binary_frame_v3 {
uint8_t version;
uint8_t flags;
net::packed<uint16_t> stream;
uint8_t opcode;
net::packed<uint32_t> length;
template <typename Adjuster>
void adjust_endianness(Adjuster a) {
return a(stream, length);
}
};
struct cql_query_state {
service::query_state query_state;
std::unique_ptr<cql3::query_options> options;
cql_query_state(service::client_state& client_state, tracing::trace_state_ptr trace_state_ptr, service_permit permit)
: query_state(client_state, std::move(trace_state_ptr), std::move(permit))
{ }
};
struct cql_server_config {
::timeout_config timeout_config;
size_t max_request_size;
sstring partitioner_name;
unsigned sharding_ignore_msb;
std::optional<uint16_t> shard_aware_transport_port;
std::optional<uint16_t> shard_aware_transport_port_ssl;
bool allow_shard_aware_drivers = true;
smp_service_group bounce_request_smp_service_group = default_smp_service_group();
};
class cql_server : public seastar::peering_sharded_service<cql_server>, public generic_server::server {
private:
struct transport_stats {
// server stats
uint64_t connects;
uint64_t connections;
uint64_t requests_served;
uint32_t requests_serving;
uint64_t requests_blocked_memory;
uint64_t requests_shed;
// cql message stats
uint64_t startups;
uint64_t auth_responses;
uint64_t options_requests;
uint64_t query_requests;
uint64_t prepare_requests;
uint64_t execute_requests;
uint64_t batch_requests;
uint64_t register_requests;
std::unordered_map<exceptions::exception_code, uint64_t> errors;
};
private:
class event_notifier;
static constexpr cql_protocol_version_type current_version = cql_serialization_format::latest_version;
distributed<cql3::query_processor>& _query_processor;
cql_server_config _config;
size_t _max_request_size;
utils::updateable_value<uint32_t> _max_concurrent_requests;
semaphore& _memory_available;
seastar::metrics::metric_groups _metrics;
std::unique_ptr<event_notifier> _notifier;
private:
transport_stats _stats = {};
auth::service& _auth_service;
qos::service_level_controller& _sl_controller;
gms::gossiper& _gossiper;
public:
cql_server(distributed<cql3::query_processor>& qp, auth::service&,
service::memory_limiter& ml,
cql_server_config config,
const db::config& db_cfg,
qos::service_level_controller& sl_controller,
gms::gossiper& g);
public:
using response = cql_transport::response;
using result_with_foreign_response_ptr = exceptions::coordinator_result<foreign_ptr<std::unique_ptr<cql_server::response>>>;
service::endpoint_lifecycle_subscriber* get_lifecycle_listener() const noexcept;
service::migration_listener* get_migration_listener() const noexcept;
future<utils::chunked_vector<client_data>> get_client_data();
private:
class fmt_visitor;
friend class connection;
friend std::unique_ptr<cql_server::response> make_result(int16_t stream, messages::result_message& msg,
const tracing::trace_state_ptr& tr_state, cql_protocol_version_type version, bool skip_metadata);
class connection : public generic_server::connection {
cql_server& _server;
socket_address _server_addr;
fragmented_temporary_buffer::reader _buffer_reader;
cql_protocol_version_type _version = 0;
cql_compression _compression = cql_compression::none;
cql_serialization_format _cql_serialization_format = cql_serialization_format::latest();
service::client_state _client_state;
timer<lowres_clock> _shedding_timer;
bool _shed_incoming_requests = false;
unsigned _request_cpu = 0;
bool _ready = false;
bool _authenticating = false;
enum class tracing_request_type : uint8_t {
not_requested,
no_write_on_close,
write_on_close
};
private:
using execution_stage_type = inheriting_concrete_execution_stage<
future<foreign_ptr<std::unique_ptr<cql_server::response>>>,
cql_server::connection*,
fragmented_temporary_buffer::istream,
uint8_t,
uint16_t,
service::client_state&,
tracing_request_type,
service_permit>;
static thread_local execution_stage_type _process_request_stage;
public:
connection(cql_server& server, socket_address server_addr, connected_socket&& fd, socket_address addr);
virtual ~connection();
future<> process_request() override;
void handle_error(future<>&& f) override;
void on_connection_close() override;
static std::tuple<net::inet_address, int, client_type> make_client_key(const service::client_state& cli_state);
client_data make_client_data() const;
const service::client_state& get_client_state() const { return _client_state; }
private:
const ::timeout_config& timeout_config() const { return _server.timeout_config(); }
friend class process_request_executor;
future<foreign_ptr<std::unique_ptr<cql_server::response>>> process_request_one(fragmented_temporary_buffer::istream buf, uint8_t op, uint16_t stream, service::client_state& client_state, tracing_request_type tracing_request, service_permit permit);
unsigned frame_size() const;
unsigned pick_request_cpu();
cql_binary_frame_v3 parse_frame(temporary_buffer<char> buf) const;
future<fragmented_temporary_buffer> read_and_decompress_frame(size_t length, uint8_t flags);
future<std::optional<cql_binary_frame_v3>> read_frame();
future<std::unique_ptr<cql_server::response>> process_startup(uint16_t stream, request_reader in, service::client_state& client_state, tracing::trace_state_ptr trace_state);
future<std::unique_ptr<cql_server::response>> process_auth_response(uint16_t stream, request_reader in, service::client_state& client_state, tracing::trace_state_ptr trace_state);
future<std::unique_ptr<cql_server::response>> process_options(uint16_t stream, request_reader in, service::client_state& client_state, tracing::trace_state_ptr trace_state);
future<result_with_foreign_response_ptr> process_query(uint16_t stream, request_reader in, service::client_state& client_state, service_permit permit, tracing::trace_state_ptr trace_state);
future<std::unique_ptr<cql_server::response>> process_prepare(uint16_t stream, request_reader in, service::client_state& client_state, tracing::trace_state_ptr trace_state);
future<result_with_foreign_response_ptr> process_execute(uint16_t stream, request_reader in, service::client_state& client_state, service_permit permit, tracing::trace_state_ptr trace_state);
future<result_with_foreign_response_ptr> process_batch(uint16_t stream, request_reader in, service::client_state& client_state, service_permit permit, tracing::trace_state_ptr trace_state);
future<std::unique_ptr<cql_server::response>> process_register(uint16_t stream, request_reader in, service::client_state& client_state, tracing::trace_state_ptr trace_state);
std::unique_ptr<cql_server::response> make_unavailable_error(int16_t stream, exceptions::exception_code err, sstring msg, db::consistency_level cl, int32_t required, int32_t alive, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_read_timeout_error(int16_t stream, exceptions::exception_code err, sstring msg, db::consistency_level cl, int32_t received, int32_t blockfor, bool data_present, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_read_failure_error(int16_t stream, exceptions::exception_code err, sstring msg, db::consistency_level cl, int32_t received, int32_t numfailures, int32_t blockfor, bool data_present, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_mutation_write_timeout_error(int16_t stream, exceptions::exception_code err, sstring msg, db::consistency_level cl, int32_t received, int32_t blockfor, db::write_type type, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_mutation_write_failure_error(int16_t stream, exceptions::exception_code err, sstring msg, db::consistency_level cl, int32_t received, int32_t numfailures, int32_t blockfor, db::write_type type, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_already_exists_error(int16_t stream, exceptions::exception_code err, sstring msg, sstring ks_name, sstring cf_name, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_unprepared_error(int16_t stream, exceptions::exception_code err, sstring msg, bytes id, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_function_failure_error(int16_t stream, exceptions::exception_code err, sstring msg, sstring ks_name, sstring func_name, std::vector<sstring> args, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_error(int16_t stream, exceptions::exception_code err, sstring msg, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_ready(int16_t stream, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_supported(int16_t stream, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_topology_change_event(const cql_transport::event::topology_change& event) const;
std::unique_ptr<cql_server::response> make_status_change_event(const cql_transport::event::status_change& event) const;
std::unique_ptr<cql_server::response> make_schema_change_event(const cql_transport::event::schema_change& event) const;
std::unique_ptr<cql_server::response> make_autheticate(int16_t, std::string_view, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_auth_success(int16_t, bytes, const tracing::trace_state_ptr& tr_state) const;
std::unique_ptr<cql_server::response> make_auth_challenge(int16_t, bytes, const tracing::trace_state_ptr& tr_state) const;
// Helper functions to encapsulate bounce_to_shard processing for query, execute and batch verbs
template<typename Process>
future<result_with_foreign_response_ptr>
process(uint16_t stream, request_reader in, service::client_state& client_state, service_permit permit, tracing::trace_state_ptr trace_state,
Process process_fn);
template<typename Process>
future<result_with_foreign_response_ptr>
process_on_shard(::shared_ptr<messages::result_message::bounce_to_shard> bounce_msg, uint16_t stream, fragmented_temporary_buffer::istream is, service::client_state& cs,
service_permit permit, tracing::trace_state_ptr trace_state, Process process_fn);
void write_response(foreign_ptr<std::unique_ptr<cql_server::response>>&& response, service_permit permit = empty_service_permit(), cql_compression compression = cql_compression::none);
void init_cql_serialization_format();
friend event_notifier;
};
friend class type_codec;
private:
virtual shared_ptr<generic_server::connection> make_connection(socket_address server_addr, connected_socket&& fd, socket_address addr) override;
future<> advertise_new_connection(shared_ptr<generic_server::connection> conn) override;
future<> unadvertise_connection(shared_ptr<generic_server::connection> conn) override;
const ::timeout_config& timeout_config() { return _config.timeout_config; }
};
class cql_server::event_notifier : public service::migration_listener,
public service::endpoint_lifecycle_subscriber
{
const cql_server& _server;
std::set<cql_server::connection*> _topology_change_listeners;
std::set<cql_server::connection*> _status_change_listeners;
std::set<cql_server::connection*> _schema_change_listeners;
std::unordered_map<gms::inet_address, event::status_change::status_type> _last_status_change;
// We want to delay sending NEW_NODE CQL event to clients until the new node
// has started listening for CQL requests.
std::unordered_set<gms::inet_address> _endpoints_pending_joined_notification;
void send_join_cluster(const gms::inet_address& endpoint);
public:
explicit event_notifier(const cql_server& s) noexcept : _server(s) {}
void register_event(cql_transport::event::event_type et, cql_server::connection* conn);
void unregister_connection(cql_server::connection* conn);
virtual void on_create_keyspace(const sstring& ks_name) override;
virtual void on_create_column_family(const sstring& ks_name, const sstring& cf_name) override;
virtual void on_create_user_type(const sstring& ks_name, const sstring& type_name) override;
virtual void on_create_view(const sstring& ks_name, const sstring& view_name) override;
virtual void on_create_function(const sstring& ks_name, const sstring& function_name) override;
virtual void on_create_aggregate(const sstring& ks_name, const sstring& aggregate_name) override;
virtual void on_update_keyspace(const sstring& ks_name) override;
virtual void on_update_column_family(const sstring& ks_name, const sstring& cf_name, bool columns_changed) override;
virtual void on_update_user_type(const sstring& ks_name, const sstring& type_name) override;
virtual void on_update_view(const sstring& ks_name, const sstring& view_name, bool columns_changed) override;
virtual void on_update_function(const sstring& ks_name, const sstring& function_name) override;
virtual void on_update_aggregate(const sstring& ks_name, const sstring& aggregate_name) override;
virtual void on_drop_keyspace(const sstring& ks_name) override;
virtual void on_drop_column_family(const sstring& ks_name, const sstring& cf_name) override;
virtual void on_drop_user_type(const sstring& ks_name, const sstring& type_name) override;
virtual void on_drop_view(const sstring& ks_name, const sstring& view_name) override;
virtual void on_drop_function(const sstring& ks_name, const sstring& function_name) override;
virtual void on_drop_aggregate(const sstring& ks_name, const sstring& aggregate_name) override;
virtual void on_join_cluster(const gms::inet_address& endpoint) override;
virtual void on_leave_cluster(const gms::inet_address& endpoint) override;
virtual void on_up(const gms::inet_address& endpoint) override;
virtual void on_down(const gms::inet_address& endpoint) override;
};
inline service::endpoint_lifecycle_subscriber* cql_server::get_lifecycle_listener() const noexcept { return _notifier.get(); }
inline service::migration_listener* cql_server::get_migration_listener() const noexcept { return _notifier.get(); }
}
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