This patch series adds tests to validate the XDP tail adjustment
functionality, focusing on its use within the AF_XDP context. The tests
verify dynamic packet size manipulation using the bpf_xdp_adjust_tail()
helper function, covering both single and multi-buffer scenarios.
---
Patch Summary:
1. Add functions to replace packet streams for ifobjects and test_spec.
2. Introduce xsk_xdp_adjust_tail to adjust packet tails dynamically.
3. Add userspace function to adjust packet tails using XDP program.
4. Add function to check if bpf_xdp_adjust_tail() is supported.
5. Add function to test packet resizing using bpf_xdp_adjust_tail.
6. Introduce test shrinking and growing packets using
bpf_xdp_adjust_tail(), and cover multi-buffer scenarios when used with
AF_XDP.
---
Tushar Vyavahare (6):
selftests/xsk: Add packet stream replacement functions
selftests/xsk: Add tail adjustment functionality to XDP
selftests/xsk: Add testapp_xdp_adjust_tail function to userspace for
packet tail adjustment
selftests/xsk: Add support check for bpf_xdp_adjust_tail() helper in
xskxceiver
selftests/xsk: Implement packet resizing test with bpf_xdp_adjust_tail
selftests/xsk: Add packet resizing tests with bpf_xdp_adjust_tail for
AF_XDP
Signed-off-by: Tushar Vyavahare <tushar.vyavahare@xxxxxxxxx>
.../selftests/bpf/progs/xsk_xdp_progs.c | 48 ++++++
tools/testing/selftests/bpf/xsk_xdp_common.h | 1 +
tools/testing/selftests/bpf/xskxceiver.c | 147 ++++++++++++++++--
tools/testing/selftests/bpf/xskxceiver.h | 2 +
4 files changed, 183 insertions(+), 15 deletions(-)
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2.34.1
