Commit Message: Adds a new flag for filter state objects that indicates the intent to share with the upstream.
Additional Description: Follow-up to #19809. There have been multiple reports of unexpected lifecycle changes for the filter state objects because they are stored in the transport socket options. This PR addresses this issue by introducing a new mark for filter state that explicitly changes the usage of filter state objects:
marked objects always participate in the connection pool hashing (generalizing and simplifying transport sockets: support passthrough state for internal connections #19435);
marked objects are copied by reference to the upstream info - this allows sharing state between downstream and upstream (and further down the chain, the internal listeners).
Risk Level: medium, revert to the original behavior prior to #19809
Testing: yes
Docs Changes: yes
Release Notes: yes
Mirrored from https://github.com/envoyproxy/envoy @ 18212bb6395af308d895f75352f82df522b038b4
Implements a special transport socket for transferring state (metadata and filter state) over the internal connection.
This transport socket captures a subset of endpoint metadata, cluster metadata, and stream filter state in the user space socket. When an internal listener accepts a user space socket connection, it immediately merges this passthrough state into the connection stream info. Because the state can be transferred from HTTP stream to TCP stream, this transport socket also participates in the hashing decisions in the HTTP connection pools.
Commit Message: Add passhtrough state over internal connection.
Risk Level: low, new extension
Testing: WIP
Docs Changes: yes
Release Notes: yes
Platform Specific Features:
Fixes: #19274
Signed-off-by: Kuat Yessenov <kuat@google.com>
Mirrored from https://github.com/envoyproxy/envoy @ 637a92a56e2739b5f78441c337171968f18b46ee
data-plane-api(Azure Pipelines)