Commit bc2550b4 authored by Jeremy Harris's avatar Jeremy Harris Committed by Jakub Kicinski
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tcp: fastopen: note that a child socket was created 



tcp: fastopen: note that a child socket was created

This uses up the last bit in a field of tcp_sock.

Signed-off-by: default avatarJeremy Harris <jgh@exim.org>
Reviewed-by: default avatarEric Dumazet <edumazet@google.com>
Reviewed-by: default avatarNeal Cardwell <ncardwell@google.com>
Link: https://patch.msgid.link/20250423124334.4916-2-jgh@exim.org


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 4134bb72

include/linux/tcp.h

+2 −1
Original line number Diff line number Diff line
@@ -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 */

net/ipv4/tcp.c

+1 −0
Original line number Diff line number Diff line
@@ -3409,6 +3409,7 @@ int tcp_disconnect(struct sock *sk, int flags) 
	tp->rack.reo_wnd_persist = 0;

	tp->rack.dsack_seen = 0;

	tp->syn_data_acked = 0;

	tp->syn_fastopen_child = 0;

	tp->rx_opt.saw_tstamp = 0;

	tp->rx_opt.dsack = 0;

	tp->rx_opt.num_sacks = 0;

net/ipv4/tcp_fastopen.c

+1 −0
Original line number Diff line number Diff line
@@ -401,6 +401,7 @@ struct sock *tcp_try_fastopen(struct sock *sk, struct sk_buff *skb, 
				}

				NET_INC_STATS(sock_net(sk),

					      LINUX_MIB_TCPFASTOPENPASSIVE);

				tcp_sk(child)->syn_fastopen_child = 1;

				return child;

			}

			NET_INC_STATS(sock_net(sk),