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| author | Chia-Yu Chang <chia-yu.chang@nokia-bell-labs.com> | 2025-09-16 11:24:32 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2025-09-18 09:47:52 +0300 |
| commit | b40671b5ee588c8a61b2d0eacbad32ffc57e9a8f (patch) | |
| tree | 02ce18b911b45d19e014de4c9d9d0fc8f093171e /include/uapi | |
| parent | aa55a7dde7ec506bb23448a5005ae3f4f809d022 (diff) | |
| download | linux-b40671b5ee588c8a61b2d0eacbad32ffc57e9a8f.tar.xz | |
tcp: accecn: AccECN option failure handling
AccECN option may fail in various way, handle these:
- Attempt to negotiate the use of AccECN on the 1st retransmitted SYN
- From the 2nd retransmitted SYN, stop AccECN negotiation
- Remove option from SYN/ACK rexmits to handle blackholes
- If no option arrives in SYN/ACK, assume Option is not usable
- If an option arrives later, re-enabled
- If option is zeroed, disable AccECN option processing
This patch use existing padding bits in tcp_request_sock and
holes in tcp_sock without increasing the size.
Signed-off-by: Ilpo Järvinen <ij@kernel.org>
Signed-off-by: Chia-Yu Chang <chia-yu.chang@nokia-bell-labs.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250916082434.100722-9-chia-yu.chang@nokia-bell-labs.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/tcp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index 53e0e85b52be..dce3113787a7 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -323,6 +323,8 @@ struct tcp_info { __u32 tcpi_received_e1_bytes; __u32 tcpi_received_e0_bytes; __u32 tcpi_received_ce_bytes; + __u16 tcpi_accecn_fail_mode; + __u16 tcpi_accecn_opt_seen; }; /* netlink attributes types for SCM_TIMESTAMPING_OPT_STATS */ |