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| author | Ilpo Järvinen <ij@kernel.org> | 2025-09-16 10:24:33 +0200 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2025-09-18 08:47:52 +0200 |
| commit | fe2cddc648f0d7cdf7377e1cb5a8c7dc5547e290 (patch) | |
| tree | 2baa2b4f1ad61b728e7018202ab6bf6d407d6b84 /include/net | |
| parent | tcp: accecn: AccECN option failure handling (diff) | |
| download | linux-fe2cddc648f0d7cdf7377e1cb5a8c7dc5547e290.tar.gz linux-fe2cddc648f0d7cdf7377e1cb5a8c7dc5547e290.zip | |
tcp: accecn: AccECN option ceb/cep and ACE field multi-wrap heuristics
The AccECN option ceb/cep heuristic algorithm is from AccECN spec
Appendix A.2.2 to mitigate against false ACE field overflows. Armed
with ceb delta from option, delivered bytes, and delivered packets it
is possible to estimate how many times ACE field wrapped.
This calculation is necessary only if more than one wrap is possible.
Without SACK, delivered bytes and packets are not always trustworthy in
which case TCP falls back to the simpler no-or-all wraps ceb algorithm.
Signed-off-by: Ilpo Järvinen <ij@kernel.org>
Signed-off-by: Chia-Yu Chang <chia-yu.chang@nokia-bell-labs.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250916082434.100722-10-chia-yu.chang@nokia-bell-labs.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/tcp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 78dd7b8a4145..7c51a0a5ace8 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -256,6 +256,7 @@ static_assert((1 << ATO_BITS) > TCP_DELACK_MAX); #define TCP_ACCECN_MAXSIZE (TCPOLEN_ACCECN_BASE + \ TCPOLEN_ACCECN_PERFIELD * \ TCP_ACCECN_NUMFIELDS) +#define TCP_ACCECN_SAFETY_SHIFT 1 /* SAFETY_FACTOR in accecn draft */ /* Flags in tp->nonagle */ #define TCP_NAGLE_OFF 1 /* Nagle's algo is disabled */ |