netdev - [PATCH net-next v5 10/15] net-timestamp: support hw SCM_TSTAMP

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Message-Id: <20250112113748.73504-11-kerneljasonxing@gmail.com>
Date: Sun, 12 Jan 2025 19:37:43 +0800
From: Jason Xing <kerneljasonxing@...il.com>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	dsahern@...nel.org,
	willemdebruijn.kernel@...il.com,
	willemb@...gle.com,
	ast@...nel.org,
	daniel@...earbox.net,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	eddyz87@...il.com,
	song@...nel.org,
	yonghong.song@...ux.dev,
	john.fastabend@...il.com,
	kpsingh@...nel.org,
	sdf@...ichev.me,
	haoluo@...gle.com,
	jolsa@...nel.org,
	horms@...nel.org
Cc: bpf@...r.kernel.org,
	netdev@...r.kernel.org,
	Jason Xing <kerneljasonxing@...il.com>
Subject: [PATCH net-next v5 10/15] net-timestamp: support hw SCM_TSTAMP_SND for bpf extension

To avoid changing so many callers using SKBTX_HW_TSTAMP from drivers,
use this simple modification like this patch does to support printing
hardware timestamp.

Signed-off-by: Jason Xing <kerneljasonxing@...il.com>
---
 include/linux/skbuff.h | 4 +++-
 net/core/skbuff.c      | 2 +-
 net/socket.c           | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 4f38c17c67a7..d3ef8db94a94 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -470,7 +470,7 @@ struct skb_shared_hwtstamps {
 /* Definitions for tx_flags in struct skb_shared_info */
 enum {
 	/* generate hardware time stamp */
-	SKBTX_HW_TSTAMP = 1 << 0,
+	__SKBTX_HW_TSTAMP = 1 << 0,
 
 	/* generate software time stamp when queueing packet to NIC */
 	SKBTX_SW_TSTAMP = 1 << 1,
@@ -494,6 +494,8 @@ enum {
 	SKBTX_BPF = 1 << 7,
 };
 
+#define SKBTX_HW_TSTAMP		(__SKBTX_HW_TSTAMP | SKBTX_BPF)
+
 #define SKBTX_ANY_SW_TSTAMP	(SKBTX_SW_TSTAMP    | \
 				 SKBTX_SCHED_TSTAMP | \
 				 SKBTX_BPF)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 17b9d8061f04..4bc7a424eb8a 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -5551,7 +5551,7 @@ static bool skb_enable_app_tstamp(struct sk_buff *skb, int tstype, bool sw)
 		if (sw)
 			flag = SKBTX_SW_TSTAMP;
 		else
-			flag = SKBTX_HW_TSTAMP;
+			flag = __SKBTX_HW_TSTAMP;
 		break;
 	case SCM_TSTAMP_ACK:
 		if (TCP_SKB_CB(skb)->txstamp_ack)
diff --git a/net/socket.c b/net/socket.c
index 4afe31656a2b..57343341bfb6 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -676,7 +676,7 @@ void __sock_tx_timestamp(__u32 tsflags, __u8 *tx_flags)
 	u8 flags = *tx_flags;
 
 	if (tsflags & SOF_TIMESTAMPING_TX_HARDWARE) {
-		flags |= SKBTX_HW_TSTAMP;
+		flags |= __SKBTX_HW_TSTAMP;
 
 		/* PTP hardware clocks can provide a free running cycle counter
 		 * as a time base for virtual clocks. Tell driver to use the
-- 
2.43.5