[PATCH net 0/6] xsk: tailroom reservation and MTU validation

[Maciej Fijalkowski <maciej.fijalkowski@intel.com>]

Hi,

here we fix a long-standing issue regarding multi-buffer scenario in ZC
mode - we have not been providing space at the end of the buffer where
multi-buffer XDP works on skb_shared_info. This has been brought to our
attention via [0].

Unaligned mode does not get any specific treatment, it is user's
responsibility to properly handle XSK addresses in queues.

With two adjustments included here in this set against xskxceiver I have
been able to pass the full test suite on ice.

Thanks,
Maciej

[0]: https://community.intel.com/t5/Ethernet-Products/X710-XDP-Packet-Corruption-Issue-DRV-MODE-Zero-Copy-Multi-Buffer/m-p/1724208


Maciej Fijalkowski (6):
  xsk: respect tailroom for ZC setups
  ice: do not round up result of dbuff calculation for xsk pool
  i40e: do not round up result of dbuff calculation for xsk pool
  xsk: validate MTU against usable frame size on bind
  selftests: bpf: fix pkt grow tests
  selftests: bpf: have a separate variable for drop test

 drivers/net/ethernet/intel/i40e/i40e_main.c   |  8 ++++---
 drivers/net/ethernet/intel/ice/ice_base.c     | 10 +++++++--
 include/net/xdp_sock_drv.h                    | 21 ++++++++++++++++++-
 net/xdp/xsk_buff_pool.c                       | 16 +++++++++++---
 .../selftests/bpf/prog_tests/test_xsk.c       | 21 ++++++++++++++++---
 .../selftests/bpf/progs/xsk_xdp_progs.c       |  3 ++-
 6 files changed, 66 insertions(+), 13 deletions(-)

-- 
2.43.0