selftests: openvswitch: add vlan() and encap() flow string parsing

Add VLAN TCI formatting and parsing support to ovs-dpctl.py:

- Add _vlan_dpstr() to decompose TCI into vid/pcp/cfi fields,
  with raw tci=0x%04x fallback when cfi=0 for round-trip safety.
- Add _parse_vlan_from_flowstr() boundary check for missing ')'.
- Add encap_ovskey subclass restricting nla_map to L2-L4 attributes
  (slots 0-21) that appear inside 802.1Q ENCAP, with metadata
  attributes set to "none".
- Check encap parse() return value for unrecognized trailing content.
- Support callable format functions in dpstr() output.
- Change OVS_KEY_ATTR_VLAN type from uint16 to be16 to match the
  kernel __be16 wire format; uint16 decodes in host byte order,
  which gives wrong values on little-endian architectures.
- Change OVS_KEY_ATTR_ENCAP type from none to encap_ovskey to
  enable recursive parsing of 802.1Q encapsulated flow keys.
- Add push_vlan action class with fields matching kernel struct
  ovs_action_push_vlan (vlan_tpid, vlan_tci as network-order u16).
- Add push_vlan dpstr format and parse with range validation
  (vid 0-4095, pcp 0-7, tpid 0-0xFFFF) and CFI forced to 1.

Signed-off-by: Minxi Hou <houminxi@gmail.com>
Reviewed-by: Aaron Conole <aconole@redhat.com>
Link: https://patch.msgid.link/20260512070841.1183581-2-houminxi@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions