[xdp-hints] (no subject)

[Larysa Zaremba <larysa.zaremba@intel.com>]

Date: Fri, 28 Jul 2023 19:10:32 +0200
Subject: [PATCH bpf-next v4 00/21] XDP metadata via kfuncs for ice
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This series introduces XDP hints via kfuncs [0] to the ice driver.

Series brings the following existing hints to the ice driver:
 - HW timestamp
 - RX hash with type

Series also introduces new hints and adds their implementation
to ice and veth:
 - VLAN tag with protocol
 - Checksum status

The data above can now be accessed by XDP and userspace (AF_XDP) programs.
They can also be checked with xdp_metadata test and xdp_hw_metadata program.

[0] https://patchwork.kernel.org/project/netdevbpf/cover/20230119221536.3349901-1-sdf@google.com/

v3:
https://lore.kernel.org/bpf/20230719183734.21681-1-larysa.zaremba@intel.com/
v2:
https://lore.kernel.org/bpf/20230703181226.19380-1-larysa.zaremba@intel.com/
v1:
https://lore.kernel.org/all/20230512152607.992209-1-larysa.zaremba@intel.com/

Changes since v3:
- use XDP_CHECKSUM_VALID_LVL0 + csum_level instead of csum_level + 1
- fix spelling mistakes
- read XDP timestamp unconditionally
- add TO_STR() macro

Changes since v2:
- redesign checksum hint, so now it gives full status
- rename vlan_tag -> vlan_tci, where applicable
- use open_netns() and close_netns() in xdp_metadata
- improve VLAN hint documentation
- replace CFI with DEI
- use VLAN_VID_MASK in xdp_metadata
- make vlan_get_tag() return -ENODATA
- remove unused rx_ptype in ice_xsk.c
- fix ice timestamp code division between patches

Changes since v1:
- directly return RX hash, RX timestamp and RX checksum status
  in skb-common functions
- use intermediate enum value for checksum status in ice
- get rid of ring structure dependency in ice kfunc implementation
- make variables const, when possible, in ice implementation
- use -ENODATA instead of -EOPNOTSUPP for driver implementation
- instead of having 2 separate functions for c-tag and s-tag,
  use 1 function that outputs both VLAN tag and protocol ID
- improve documentation for introduced hints
- update xdp_metadata selftest to test new hints
- implement new hints in veth, so they can be tested in xdp_metadata
- parse VLAN tag in xdp_hw_metadata

Aleksander Lobakin (1):
  net, xdp: allow metadata > 32

Larysa Zaremba (17):
  ice: make RX hash reading code more reusable
  ice: make RX HW timestamp reading code more reusable
  ice: make RX checksum checking code more reusable
  ice: Make ptype internal to descriptor info processing
  ice: Introduce ice_xdp_buff
  ice: Support HW timestamp hint
  ice: Support RX hash XDP hint
  ice: Support XDP hints in AF_XDP ZC mode
  xdp: Add VLAN tag hint
  ice: Implement VLAN tag hint
  ice: use VLAN proto from ring packet context in skb path
  xdp: Add checksum hint
  ice: Implement checksum hint
  selftests/bpf: Allow VLAN packets in xdp_hw_metadata
  selftests/bpf: Add flags and new hints to xdp_hw_metadata
  veth: Implement VLAN tag and checksum XDP hint
  net: make vlan_get_tag() return -ENODATA instead of -EINVAL

Yonghong Song (3):
  docs/bpf: Add documentation for new instructions
  bpf: Fix compilation warning with -Wparentheses
  selftests/bpf: Enable test test_progs-cpuv4 for gcc build kernel

-- 
2.41.0