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| author | Stanislav Fomichev <[email protected]> | 2023-11-27 19:03:07 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <[email protected]> | 2023-11-29 22:59:40 +0000 |
| commit | 341ac980eab90ac1f6c22ee9f9da83ed9604d899 (patch) | |
| tree | 5b12e210a709a24f3b5b68ec466c5b6e044a81c6 /tools/net/ynl/generated/netdev-user.h | |
| parent | Merge branch 'selftests-bpf-use-pkg-config-to-determine-ld-flags' (diff) | |
| download | kernel-341ac980eab90ac1f6c22ee9f9da83ed9604d899.tar.gz kernel-341ac980eab90ac1f6c22ee9f9da83ed9604d899.zip | |
xsk: Support tx_metadata_len
For zerocopy mode, tx_desc->addr can point to an arbitrary offset
and carry some TX metadata in the headroom. For copy mode, there
is no way currently to populate skb metadata.
Introduce new tx_metadata_len umem config option that indicates how many
bytes to treat as metadata. Metadata bytes come prior to tx_desc address
(same as in RX case).
The size of the metadata has mostly the same constraints as XDP:
- less than 256 bytes
- 8-byte aligned (compared to 4-byte alignment on xdp, due to 8-byte
timestamp in the completion)
- non-zero
This data is not interpreted in any way right now.
Reviewed-by: Song Yoong Siang <[email protected]>
Signed-off-by: Stanislav Fomichev <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>
Diffstat (limited to 'tools/net/ynl/generated/netdev-user.h')
0 files changed, 0 insertions, 0 deletions