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When a CONNECTION_CLOSE is emitted or received, a QUIC connection enters respectively in draining or closing state. These states are a loose equivalent of TCP TIME_WAIT. No data can be exchanged anymore but the connection is maintained during a certain timer to handle packet reordering or loss. A new global list has been defined for QUIC connections in closing/draining state inside thread_ctx structure. Each time a connection enters in one of this state, it will be moved from the default global list to the new closing list. The objective of this patch is to quickly filter connections on closing/draining. Most notably, this will be used to wake up these connections and avoid that haproxy process stopping is delayed by them. A dedicated function qc_detach_th_ctx_list() has been implemented to transfer a quic-conn from one list instance to the other. This takes care of back-references attach to a quic-conn instance in case of a running "show quic". This should be backported up to 2.7.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)