netdev - [PATCH net-next 04/44] tcp: use BIT() macro in include/net/tcp.h

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Message-Id: <20241015102940.26157-5-chia-yu.chang@nokia-bell-labs.com>
Date: Tue, 15 Oct 2024 12:29:00 +0200
From: chia-yu.chang@...ia-bell-labs.com
To: netdev@...r.kernel.org, ij@...nel.org, ncardwell@...gle.com,
        koen.de_schepper@...ia-bell-labs.com, g.white@...leLabs.com,
        ingemar.s.johansson@...csson.com, mirja.kuehlewind@...csson.com,
        cheshire@...le.com, rs.ietf@....at, Jason_Livingood@...cast.com,
        vidhi_goel@...le.com
Cc: Chia-Yu Chang <chia-yu.chang@...ia-bell-labs.com>
Subject: [PATCH net-next 04/44] tcp: use BIT() macro in include/net/tcp.h

From: Chia-Yu Chang <chia-yu.chang@...ia-bell-labs.com>

Use BIT() macro for TCP flags field and TCP congestion control
flags that will be used by the congestion control algorithm.

No functional changes.

Signed-off-by: Chia-Yu Chang <chia-yu.chang@...ia-bell-labs.com>
Reviewed-by: Ilpo Järvinen <ij@...nel.org>
---
 include/net/tcp.h | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 739a9fb83d0c..bc34b450929c 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -26,6 +26,7 @@
 #include <linux/kref.h>
 #include <linux/ktime.h>
 #include <linux/indirect_call_wrapper.h>
+#include <linux/bits.h>
 
 #include <net/inet_connection_sock.h>
 #include <net/inet_timewait_sock.h>
@@ -911,14 +912,14 @@ static inline u32 tcp_rsk_tsval(const struct tcp_request_sock *treq)
 
 #define tcp_flag_byte(th) (((u_int8_t *)th)[13])
 
-#define TCPHDR_FIN 0x01
-#define TCPHDR_SYN 0x02
-#define TCPHDR_RST 0x04
-#define TCPHDR_PSH 0x08
-#define TCPHDR_ACK 0x10
-#define TCPHDR_URG 0x20
-#define TCPHDR_ECE 0x40
-#define TCPHDR_CWR 0x80
+#define TCPHDR_FIN	BIT(0)
+#define TCPHDR_SYN	BIT(1)
+#define TCPHDR_RST	BIT(2)
+#define TCPHDR_PSH	BIT(3)
+#define TCPHDR_ACK	BIT(4)
+#define TCPHDR_URG	BIT(5)
+#define TCPHDR_ECE	BIT(6)
+#define TCPHDR_CWR	BIT(7)
 
 #define TCPHDR_SYN_ECN	(TCPHDR_SYN | TCPHDR_ECE | TCPHDR_CWR)
 
@@ -1107,9 +1108,9 @@ enum tcp_ca_ack_event_flags {
 #define TCP_CA_UNSPEC	0
 
 /* Algorithm can be set on socket without CAP_NET_ADMIN privileges */
-#define TCP_CONG_NON_RESTRICTED 0x1
+#define TCP_CONG_NON_RESTRICTED		BIT(0)
 /* Requires ECN/ECT set on all packets */
-#define TCP_CONG_NEEDS_ECN	0x2
+#define TCP_CONG_NEEDS_ECN		BIT(1)
 #define TCP_CONG_MASK	(TCP_CONG_NON_RESTRICTED | TCP_CONG_NEEDS_ECN)
 
 union tcp_cc_info;
-- 
2.34.1