rdma/mlx5_dv: stamp RoCE IPv4 TOS from nvme/nvmf transport opts - #7
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Hardcoding TOS 96 made the canary work but ignored dataEngineRdmaPriorityClass. Copy transport_tos / nvmf tos onto the provider QP and into the RTR AV (tclass=tos, sl=tos>>5). TOS 0 leaves the AV untagged. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
transport_tos(initiator) and nvmftos(target) onto the provider QP, then into the RTR AV:traffic_class = tos,sl = tos >> 5.dataEngineRdmaPriorityClassisv2: 3(TOS 96). Changing that setting will now change the wire mark after QP reconnect.Test plan
--with-rdma=mlx5_dv; pin and IMreset.15RoCE RTR TOS 96;xe-1/1/5Q3 still incrementsMade with Cursor