diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2025-04-24 18:21:07 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-04-24 18:21:07 -0700 |
| commit | a764e8114d2d80e8b0f453084b2e9fcc6454b7a1 (patch) | |
| tree | 56b3c3d26b4e65bbe2ab42f02a6b71c632818cbb /include/linux | |
| parent | 4134bb726efdc7a4a64bd0f776359cb0564564b2 (diff) | |
| parent | 2b13042d3636327eb50c8a0ee06f629d52d1b8fb (diff) | |
Merge branch 'tcp-fastopen-observability'
Jeremy Harris says:
====================
tcp: fastopen: observability
Whether TCP Fast Open was used for a connection is not reliably
observable by an accepting application when the SYN passed no data.
Fix this by noting during SYN receive processing that an acceptable Fast
Open option was used, and provide this to userland via getsockopt TCP_INFO.
====================
Link: https://patch.msgid.link/20250423124334.4916-1-jgh@exim.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/tcp.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 1669d95bb0f9..a8af71623ba7 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -385,7 +385,8 @@ struct tcp_sock { syn_fastopen:1, /* SYN includes Fast Open option */ syn_fastopen_exp:1,/* SYN includes Fast Open exp. option */ syn_fastopen_ch:1, /* Active TFO re-enabling probe */ - syn_data_acked:1;/* data in SYN is acked by SYN-ACK */ + syn_data_acked:1,/* data in SYN is acked by SYN-ACK */ + syn_fastopen_child:1; /* created TFO passive child socket */ u8 keepalive_probes; /* num of allowed keep alive probes */ u32 tcp_tx_delay; /* delay (in usec) added to TX packets */ |