chenBright opened a new pull request, #3352:
URL: https://github.com/apache/brpc/pull/3352
### What problem does this PR solve?
Issue Number: resolve
Problem Summary:
In #3255, `BringUpQp()` only did a local `ibv_query_ece` + `ibv_set_ece`
roundtrip and never exchanged ECE capabilities with the peer.
### What is changed and the side effects?
Changed:
This PR implements an end-to-end ECE negotiation in the v3 handshake.
- Client (`RdmaHandshakeClientV3::SendLocalHello`): query local ECE,
store it in `_outgoing_ece`, advertise it in the v3 hello.
- Server (`BringUpQp`): apply the client's ECE during INIT->RTR
(`ibv_set_ece`).
After QP reaches RTS, `ibv_query_ece` to obtain the reduced/negotiated
ECE
(the subset both peers support) and store it in `_outgoing_ece`.
- Server (`SendLocalHello` → `FillLocalRdmaHello`): advertise the negotiated
ECE
in the reply hello.
- Client (`BringUpQp`): apply the server's reduced ECE during INIT->RTR.
Side effects:
- Performance effects:
- Breaking backward compatibility:
---
### Check List:
- Please make sure your changes are compilable.
- When providing us with a new feature, it is best to add related tests.
- Please follow [Contributor Covenant Code of
Conduct](https://github.com/apache/brpc/blob/master/CODE_OF_CONDUCT.md).
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