[net-next, v3 0/2] psp: Support PSP Tx on logical devices like VLAN

[Kiran Kella]

This patch adds support to allow transmit on virtual devices if the
bottom most underlying transport device matches the PSP device associated
with the transmitting application socket.

  python ./psp.py
  TAP version 13
  1..29
  ok 1 psp.data_basic_send_v0_ip4
  ok 2 psp.data_basic_send_v0_ip6
  ok 3 psp.data_basic_send_v1_ip4
  ok 4 psp.data_basic_send_v1_ip6
  ok 5 psp.data_basic_send_v2_ip4
  ok 6 psp.data_basic_send_v2_ip6
  ok 7 psp.data_basic_send_v3_ip4
  ok 8 psp.data_basic_send_v3_ip6
  ok 9 psp.data_mss_adjust_ip4
  ok 10 psp.data_mss_adjust_ip6
  ok 11 psp.dev_list_devices
  ok 12 psp.dev_get_device
  ok 13 psp.dev_get_device_bad
  ok 14 psp.dev_rotate
  ok 15 psp.dev_rotate_spi
  ok 16 psp.assoc_basic
  ok 17 psp.assoc_bad_dev
  ok 18 psp.assoc_sk_only_conn
  ok 19 psp.assoc_sk_only_mismatch
  ok 20 psp.assoc_sk_only_mismatch_tx
  ok 21 psp.assoc_sk_only_unconn
  ok 22 psp.assoc_version_mismatch
  ok 23 psp.assoc_twice
  ok 24 psp.data_send_bad_key
  ok 25 psp.data_send_disconnect
  ok 26 psp.data_stale_key
  ok 27 psp.removal_device_rx
  ok 28 psp.removal_device_bi
  ok 29 psp.vlan_basic_send
  # Totals: pass:29 fail:0 xfail:0 xpass:0 skip:0 error:0
  #
  # Responder logs (0):
  # STDERR:
  # #  Set PSP enable on device 3 to 0xf
  # #  Set PSP enable on device 3 to 0x0

CHANGES:
v3:
  - Enable 8021q module in the net/config for vlan test
  - Guard against a race between psp_netdevice_event and psp_dev_unregister
    by using psp_dev_tryget/put in the linking path to ensure the psp_dev
    is still alive before propagating it to upper devices.

v2: 
  - Simplified the psp_netdevice_event() to return if the upper device is
    bond device.
  - Handle the scenario where the psp_dev_unregister() is invoked by a
    driver before the unregister_netdev() that can result in stale
    psp_dev pointer in the upper devices. 
  - Fix the vlan_basic_send test to run on any lower device and not
    require nsim.

v1: https://lore.kernel.org/all/20260121073517.3323332-1-kiran.kella@xxxxxxxxxxxx/

Kiran Kella (2):
  psp: Support for transmit on logical device when the underlying
    transport device supports PSP.
  selftests: drv-net: psp: add test for VLAN sub-interface

 net/psp/psp_main.c                         | 117 ++++++++++++++++++++-
 tools/testing/selftests/drivers/net/config |   1 +
 tools/testing/selftests/drivers/net/psp.py |  81 +++++++++++++-
 3 files changed, 197 insertions(+), 2 deletions(-)

-- 
2.45.4