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author | Larysa Zaremba <larysa.zaremba@intel.com> | 2023-10-17 19:27:57 +0300 |
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committer | Daniel Borkmann <daniel@iogearbox.net> | 2023-10-18 11:08:28 +0300 |
commit | bb6a88885fde24835afdaa1c5bb976a1bf5c5d71 (patch) | |
tree | fb6d11350096d03d673f7389b7922b1484ed85a4 /Documentation/bpf/standardization | |
parent | 24516309e330cd592c04d0467313d885584af4e8 (diff) | |
download | linux-bb6a88885fde24835afdaa1c5bb976a1bf5c5d71.tar.xz |
selftests/bpf: Add options and frags to xdp_hw_metadata
This is a follow-up to the commit 9b2b86332a9b ("bpf: Allow to use kfunc
XDP hints and frags together").
The are some possible implementations problems that may arise when providing
metadata specifically for multi-buffer packets, therefore there must be a
possibility to test such option separately.
Add an option to use multi-buffer AF_XDP xdp_hw_metadata and mark used XDP
program as capable to use frags.
As for now, xdp_hw_metadata accepts no options, so add simple option
parsing logic and a help message.
For quick reference, also add an ingress packet generation command to the
help message. The command comes from [0].
Example of output for multi-buffer packet:
xsk_ring_cons__peek: 1
0xead018: rx_desc[15]->addr=10000000000f000 addr=f100 comp_addr=f000
rx_hash: 0x5789FCBB with RSS type:0x29
rx_timestamp: 1696856851535324697 (sec:1696856851.5353)
XDP RX-time: 1696856843158256391 (sec:1696856843.1583)
delta sec:-8.3771 (-8377068.306 usec)
AF_XDP time: 1696856843158413078 (sec:1696856843.1584)
delta sec:0.0002 (156.687 usec)
0xead018: complete idx=23 addr=f000
xsk_ring_cons__peek: 1
0xead018: rx_desc[16]->addr=100000000008000 addr=8100 comp_addr=8000
0xead018: complete idx=24 addr=8000
xsk_ring_cons__peek: 1
0xead018: rx_desc[17]->addr=100000000009000 addr=9100 comp_addr=9000 EoP
0xead018: complete idx=25 addr=9000
Metadata is printed for the first packet only.
[0] https://lore.kernel.org/all/20230119221536.3349901-18-sdf@google.com/
Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/20231017162800.24080-1-larysa.zaremba@intel.com
Diffstat (limited to 'Documentation/bpf/standardization')
0 files changed, 0 insertions, 0 deletions