linux-kernel - Re: [PATCH net-next] trace: tcp: Add tracepoint for tcp

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Message-ID: <102dfbdc-4626-4a9c-ab8a-c8ce015a1f36@kernel.org>
Date: Wed, 2 Apr 2025 08:11:03 -0600
From: David Ahern <dsahern@...nel.org>
To: Breno Leitao <leitao@...ian.org>
Cc: Eric Dumazet <edumazet@...gle.com>, Neal Cardwell <ncardwell@...gle.com>,
 Kuniyuki Iwashima <kuniyu@...zon.com>, Steven Rostedt <rostedt@...dmis.org>,
 Masami Hiramatsu <mhiramat@...nel.org>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org, kernel-team@...a.com,
 yonghong.song@...ux.dev
Subject: Re: [PATCH net-next] trace: tcp: Add tracepoint for tcp_sendmsg()

On 4/2/25 8:57 AM, Breno Leitao wrote:
> diff --git a/include/trace/events/tcp.h b/include/trace/events/tcp.h
> index 1a40c41ff8c30..cd90a8c66d683 100644
> --- a/include/trace/events/tcp.h
> +++ b/include/trace/events/tcp.h
> @@ -259,6 +259,29 @@ TRACE_EVENT(tcp_retransmit_synack,
>  		  __entry->saddr_v6, __entry->daddr_v6)
>  );
>  
> +TRACE_EVENT(tcp_sendmsg_locked,
> +	TP_PROTO(struct msghdr *msg, struct sk_buff *skb, int size_goal),

How about passing in the sk reference here; not needed for trace
entries, but makes it directly accessible for bpf programs.

Otherwise, LGTM.