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authorFlorian Westphal <fw@strlen.de>2020-07-30 22:25:50 +0300
committerDavid S. Miller <davem@davemloft.net>2020-08-01 02:55:32 +0300
commitf8ace8d915b88bd1bbaac695de94650dbb25c7b4 (patch)
tree84837acec01f6cf7f116e09406c6d3e07991c08e /net/ipv4
parent77aec5e1c4935e37c8cbb818a69f2f7d3433ede5 (diff)
downloadlinux-f8ace8d915b88bd1bbaac695de94650dbb25c7b4.tar.xz
tcp: rename request_sock cookie_ts bit to syncookie
Nowadays output function has a 'synack_type' argument that tells us when the syn/ack is emitted via syncookies. The request already tells us when timestamps are supported, so check both to detect special timestamp for tcp option encoding is needed. We could remove cookie_ts altogether, but a followup patch would otherwise need to adjust function signatures to pass 'want_cookie' to mptcp core. This way, the 'existing' bit can be used. Suggested-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/tcp_input.c3
-rw-r--r--net/ipv4/tcp_output.c2
2 files changed, 2 insertions, 3 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index a018bafd7bdf..11a6f128e51c 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -6519,7 +6519,6 @@ static void tcp_openreq_init(struct request_sock *req,
struct inet_request_sock *ireq = inet_rsk(req);
req->rsk_rcv_wnd = 0; /* So that tcp_send_synack() knows! */
- req->cookie_ts = 0;
tcp_rsk(req)->rcv_isn = TCP_SKB_CB(skb)->seq;
tcp_rsk(req)->rcv_nxt = TCP_SKB_CB(skb)->seq + 1;
tcp_rsk(req)->snt_synack = 0;
@@ -6674,6 +6673,7 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
if (!req)
goto drop;
+ req->syncookie = want_cookie;
tcp_rsk(req)->af_specific = af_ops;
tcp_rsk(req)->ts_off = 0;
#if IS_ENABLED(CONFIG_MPTCP)
@@ -6739,7 +6739,6 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
if (want_cookie) {
isn = cookie_init_sequence(af_ops, sk, skb, &req->mss);
- req->cookie_ts = tmp_opt.tstamp_ok;
if (!tmp_opt.tstamp_ok)
inet_rsk(req)->ecn_ok = 0;
}
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index d8f16f6a9b02..85ff417bda7f 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -3393,7 +3393,7 @@ struct sk_buff *tcp_make_synack(const struct sock *sk, struct dst_entry *dst,
memset(&opts, 0, sizeof(opts));
now = tcp_clock_ns();
#ifdef CONFIG_SYN_COOKIES
- if (unlikely(req->cookie_ts))
+ if (unlikely(synack_type == TCP_SYNACK_COOKIE && ireq->tstamp_ok))
skb->skb_mstamp_ns = cookie_init_timestamp(req, now);
else
#endif