Fix background fill on TLS connections - #12502
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Co-authored-by: Masakazu Kitajo <maskit@apache.org>
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Cherry-picked to 10.1.x branch |
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* Fix background fill on TLS Co-authored-by: Masakazu Kitajo <maskit@apache.org> * Adjust http2_rst_stream AuTest * TLS Blind Tunnel Support * Adjust background_fill AuTests * Fix docs * Fix AuTest --------- Co-authored-by: Masakazu Kitajo <maskit@apache.org> (cherry picked from commit c56a55a) (cherry picked from commit 906da289cfed48b4600370e00cf6f5b5c9aff7d4)
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…13523) HttpSM::state_watch_for_client_abort reached past the transaction to _ua.get_txn()->get_netvc() to half close the client read side on an early EOS. For HTTP/2 and HTTP/3 that NetVConnection is shared by every stream on the connection, so a single aborted stream stopped the session from reading frames for all of the others. Route the shutdown through the transaction instead: Http2Stream and HQTransaction already implement do_io_shutdown() as a deliberate no-op for exactly this reason, and HTTP/1.x is unaffected because ProxyTransaction forwards to the session's NetVConnection. This is the remaining half of #12529. That change was written to address two regressions from #12502, the second being "HTTP/2 connection is closed if a stream is reset even if other streams are alive", with the stated approach of calling ProxyTransaction::do_io_shutdown() instead of NetVConnection::do_io_shutdown(). It converted the two branches it added but left the pre-existing IO_SHUTDOWN_READ branch calling the NetVConnection directly, so the connection-wide shutdown survived for the case where the tunnel still has a consumer besides the client. A response transform reaches that case readily: the transform stage runs the whole body before anything is written back, so the stream has no write of its own and a client reset arrives as an EOS on the stream's read VIO. Clearing the session's read VIO buffer is not inert, because Http2CommonSession still holds that VIO and re-enables it every 128 frames through HTTP2_SESSION_EVENT_REENABLE. A release build then takes the ntodo() <= 0 path in net_read_io and the connection stalls silently, failing every in-flight stream; a debug build aborts on SSLNetVConnection's `ink_assert(buf.writer())`, the assertion reported in #9448. Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
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…13523) HttpSM::state_watch_for_client_abort reached past the transaction to _ua.get_txn()->get_netvc() to half close the client read side on an early EOS. For HTTP/2 and HTTP/3 that NetVConnection is shared by every stream on the connection, so a single aborted stream stopped the session from reading frames for all of the others. Route the shutdown through the transaction instead: Http2Stream and HQTransaction already implement do_io_shutdown() as a deliberate no-op for exactly this reason, and HTTP/1.x is unaffected because ProxyTransaction forwards to the session's NetVConnection. This is the remaining half of #12529. That change was written to address two regressions from #12502, the second being "HTTP/2 connection is closed if a stream is reset even if other streams are alive", with the stated approach of calling ProxyTransaction::do_io_shutdown() instead of NetVConnection::do_io_shutdown(). It converted the two branches it added but left the pre-existing IO_SHUTDOWN_READ branch calling the NetVConnection directly, so the connection-wide shutdown survived for the case where the tunnel still has a consumer besides the client. A response transform reaches that case readily: the transform stage runs the whole body before anything is written back, so the stream has no write of its own and a client reset arrives as an EOS on the stream's read VIO. Clearing the session's read VIO buffer is not inert, because Http2CommonSession still holds that VIO and re-enables it every 128 frames through HTTP2_SESSION_EVENT_REENABLE. A release build then takes the ntodo() <= 0 path in net_read_io and the connection stalls silently, failing every in-flight stream; a debug build aborts on SSLNetVConnection's `ink_assert(buf.writer())`, the assertion reported in #9448. Co-authored-by: Claude Opus 5 <noreply@anthropic.com> (cherry picked from commit 31eb68f)
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Fix #12473
Prior to this change, EOS event handling in
HttpSM::state_watch_for_client_abortwas completely different from underlaying protocols. If it's TLS and client aborts early, ATS kills HttpTunnel and terminates HttpSM immediately. Which means ATS doesn't wait response from origin server and the background fill feature can't kick in. This change the behavior to almost the same as plaintext HTTP.TLS 1.3 has half-open support, so we should implement it, but it's out of scope from this PR.
Co-authored-by: Masakazu Kitajo maskit@apache.org