Experimental devlink per-port parameter support - #2
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lhoward wants to merge 2 commits into
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Replace the per-entry MDBFlags bitmask (with its streamReserved member) and the filterStreamReserved bridge port option with an MDBState enum (temporary, permanent, dynamicReservation) carried in br_mdb_entry.state. A reserved stream is now added by passing state: .dynamicReservation to RTNLLinkBridge.add(), and RTNLMDBEntry exposes mdbState plus an isDynamicReservation accessor. This tracks the kernel UAPI rework that replaced MDB_FLAGS_STREAM_RESERVED with the MDB_DYNAMIC_RESERVATION entry state and removed the IFLA_BRPORT_FILTER_STREAM_RESERVED port flag (the software bridge now tags such frames for a tc-flower egress rule rather than filtering on the ingress port). Update the nltool example to the new state-based API. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add a minimal devlink (generic netlink) client, sufficient to enumerate devlink ports and set a per-port parameter, so callers can drive the mv88e6xxx per-port "avb_cfg" knob that replaces the old BR_FILTER_STREAM_RESERVED bridge port flag. RTNLDevlink opens a dedicated NETLINK_GENERIC socket, resolves the "devlink" genl family, dumps DEVLINK_CMD_PORT_GET (RTNLDevlinkPort), and issues DEVLINK_CMD_PORT_PARAM_SET. The devlink uAPI command/attribute constants are duplicated as Swift enums because the build host's <linux/devlink.h> may predate the per-port parameter commands. NLSocket_CB_VALID grows a NETLINK_GENERIC arm that recognises devlink PORT_NEW dump replies and yields RTNLDevlinkPort. CNetLink pulls in the genl/ctrl headers and Package.swift links nl-genl-3. Experimental and not yet exercised against hardware.
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Adds a minimal devlink (generic netlink) client — enough to enumerate devlink ports and set a per-port parameter — so callers can drive the mv88e6xxx per-port avb_cfg knob that replaces the old BR_FILTER_STREAM_RESERVED bridge port flag in the 802.1Qat stream-reservation rework.
What's here
Status
Experimental — not yet built or exercised against hardware in this environment.
Note on base
This branch is based on local main, which is ahead of origin/main by one unpushed commit (NetLink: model MDB entry state, replacing the stream-reserved flag). That commit therefore also appears in this PR's diff; it is a prerequisite for the wider rework and is expected to land with / ahead of this work.
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