quic: add QUIC downstream connection close error stats. #16584
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| #include "common/quic/quic_stats.h" | ||
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| namespace Envoy { | ||
| namespace Quic { | ||
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| QuicStats::QuicStats(Stats::SymbolTable& symbol_table) | ||
| : stat_name_pool_(symbol_table), symbol_table_(symbol_table), | ||
| downstream_(stat_name_pool_.add("downstream")), upstream_(stat_name_pool_.add("upstream")), | ||
| from_self_(stat_name_pool_.add("self")), from_peer_(stat_name_pool_.add("peer")) { | ||
| // Preallocate most used counters | ||
| connectionCloseStatName(quic::QUIC_NETWORK_IDLE_TIMEOUT); | ||
| } | ||
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| void QuicStats::incCounter(Stats::Scope& scope, const Stats::StatNameVec& names) { | ||
| Stats::SymbolTable::StoragePtr stat_name_storage = symbol_table_.join(names); | ||
| scope.counterFromStatName(Stats::StatName(stat_name_storage.get())).inc(); | ||
| } | ||
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| void QuicStats::chargeQuicConnectionCloseStats(Stats::Scope& scope, quic::QuicErrorCode error_code, | ||
| quic::ConnectionCloseSource source, | ||
| bool is_upstream) { | ||
| ASSERT(&symbol_table_ == &scope.symbolTable()); | ||
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| const Stats::StatName connection_close = connectionCloseStatName(error_code); | ||
| incCounter(scope, {is_upstream ? upstream_ : downstream_, | ||
| source == quic::ConnectionCloseSource::FROM_SELF ? from_self_ : from_peer_, | ||
| connection_close}); | ||
| } | ||
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| Stats::StatName QuicStats::connectionCloseStatName(quic::QuicErrorCode error_code) { | ||
| ASSERT(error_code < quic::QUIC_LAST_ERROR); | ||
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| return Stats::StatName( | ||
| connection_error_stat_names_.get(error_code, [this, error_code]() -> const uint8_t* { | ||
| return stat_name_pool_.addReturningStorage( | ||
| absl::StrCat("quic_connection_close_error_code_", QuicErrorCodeToString(error_code))); | ||
| })); | ||
| } | ||
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| } // namespace Quic | ||
| } // namespace Envoy |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| #pragma once | ||
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| #include "envoy/stats/scope.h" | ||
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| #include "common/common/thread.h" | ||
| #include "common/stats/symbol_table_impl.h" | ||
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| #include "quiche/quic/core/quic_error_codes.h" | ||
| #include "quiche/quic/core/quic_types.h" | ||
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| namespace Envoy { | ||
| namespace Quic { | ||
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| class QuicStats { | ||
| public: | ||
| explicit QuicStats(Stats::SymbolTable& symbol_table); | ||
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| void chargeQuicConnectionCloseStats(Stats::Scope& scope, quic::QuicErrorCode error_code, | ||
| quic::ConnectionCloseSource source, bool is_upstream); | ||
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| private: | ||
| void incCounter(Stats::Scope& scope, const Stats::StatNameVec& names); | ||
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| Stats::StatName connectionCloseStatName(quic::QuicErrorCode error_code); | ||
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| Stats::StatNamePool stat_name_pool_; | ||
| Stats::SymbolTable& symbol_table_; | ||
| const Stats::StatName downstream_; | ||
| const Stats::StatName upstream_; | ||
| const Stats::StatName from_self_; | ||
| const Stats::StatName from_peer_; | ||
| Thread::AtomicPtrArray<const uint8_t, quic::QUIC_LAST_ERROR, | ||
| Thread::AtomicPtrAllocMode::DoNotDelete> | ||
| connection_error_stat_names_; | ||
| }; | ||
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| } // namespace Quic | ||
| } // namespace Envoy |
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I'd suggest bundling QuicStats and quic::QuicConfig into a class Quic::Context, which can parallel Http::Context in most ways.
That will cut down by one on the arg-count in a few interfaces in this PR, and give you other good places to put stuff that may need to be shared across workers.
Moreover,
Quic::Context(or maybeOptRef<Quic::Context>) could then be returned fromServer::FactoryContext, also parallel to Http::Context and Grpc::Context, cutting down on how much plumbing through needs to happen for those individually.There was a problem hiding this comment.
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I originally tried to make QuicStats behave similarly to Http::Context but found it to be quite complicated.
To have the server return QuicStats, we need a pure interface class so that Server::Instance can have a getter interface Quic::QuicStats quicStats().
However, the only public method in QuicStats, chargeQuicConnectionCloseStats(), is dependent on QuicErrorCode, which is defined in third_party library Quiche.
In my understanding, Envoy must to be able to build without quiche. And we probably shouldn't introduce external dependency in the include/ directory either.
Having this dependency makes it hard to follow existing pattern when implementing Quic stats.
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On this point, to match the pattern in the other Contexts is to forward-declare QuicStats without defining an interface for it.
So you'd have
So you don't need to expose the error-code type or other types at the interface.