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-rw-r--r--include/linux/tcp.h9
-rw-r--r--include/net/inet_sock.h3
-rw-r--r--include/net/tcp.h7
3 files changed, 16 insertions, 3 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 173a7c2f9636..8c431385b272 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -98,7 +98,8 @@ struct tcp_options_received {
tstamp_ok : 1, /* TIMESTAMP seen on SYN packet */
dsack : 1, /* D-SACK is scheduled */
wscale_ok : 1, /* Wscale seen on SYN packet */
- sack_ok : 4, /* SACK seen on SYN packet */
+ sack_ok : 3, /* SACK seen on SYN packet */
+ smc_ok : 1, /* SMC seen on SYN packet */
snd_wscale : 4, /* Window scaling received from sender */
rcv_wscale : 4; /* Window scaling to send to receiver */
u8 num_sacks; /* Number of SACK blocks */
@@ -110,6 +111,9 @@ static inline void tcp_clear_options(struct tcp_options_received *rx_opt)
{
rx_opt->tstamp_ok = rx_opt->sack_ok = 0;
rx_opt->wscale_ok = rx_opt->snd_wscale = 0;
+#if IS_ENABLED(CONFIG_SMC)
+ rx_opt->smc_ok = 0;
+#endif
}
/* This is the max number of SACKS that we'll generate and process. It's safe
@@ -229,7 +233,8 @@ struct tcp_sock {
syn_fastopen_ch:1, /* Active TFO re-enabling probe */
syn_data_acked:1,/* data in SYN is acked by SYN-ACK */
save_syn:1, /* Save headers of SYN packet */
- is_cwnd_limited:1;/* forward progress limited by snd_cwnd? */
+ is_cwnd_limited:1,/* forward progress limited by snd_cwnd? */
+ syn_smc:1; /* SYN includes SMC */
u32 tlp_high_seq; /* snd_nxt at the time of TLP retransmit. */
/* RTT measurement */
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index 425752f768d2..c49938d1481a 100644
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -92,7 +92,8 @@ struct inet_request_sock {
wscale_ok : 1,
ecn_ok : 1,
acked : 1,
- no_srccheck: 1;
+ no_srccheck: 1,
+ smc_ok : 1;
kmemcheck_bitfield_end(flags);
u32 ir_mark;
union {
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 2392f74074e7..285bc82dea41 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -191,6 +191,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo);
* experimental options. See draft-ietf-tcpm-experimental-options-00.txt
*/
#define TCPOPT_FASTOPEN_MAGIC 0xF989
+#define TCPOPT_SMC_MAGIC 0xE2D4C3D9
/*
* TCP option lengths
@@ -203,6 +204,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo);
#define TCPOLEN_MD5SIG 18
#define TCPOLEN_FASTOPEN_BASE 2
#define TCPOLEN_EXP_FASTOPEN_BASE 4
+#define TCPOLEN_EXP_SMC_BASE 6
/* But this is what stacks really send out. */
#define TCPOLEN_TSTAMP_ALIGNED 12
@@ -213,6 +215,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo);
#define TCPOLEN_SACK_PERBLOCK 8
#define TCPOLEN_MD5SIG_ALIGNED 20
#define TCPOLEN_MSS_ALIGNED 4
+#define TCPOLEN_EXP_SMC_BASE_ALIGNED 8
/* Flags in tp->nonagle */
#define TCP_NAGLE_OFF 1 /* Nagle's algo is disabled */
@@ -2108,4 +2111,8 @@ static inline bool tcp_bpf_ca_needs_ecn(struct sock *sk)
{
return (tcp_call_bpf(sk, BPF_SOCK_OPS_NEEDS_ECN) == 1);
}
+
+#if IS_ENABLED(CONFIG_SMC)
+extern struct static_key_false tcp_have_smc;
+#endif
#endif /* _TCP_H */