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Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , kuniyu@amazon.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, yonghong.song@linux.dev, song@kernel.org, kernel-team@meta.com, Breno Leitao X-Mailer: b4 0.15-dev-42535 X-Developer-Signature: v=1; a=openpgp-sha256; l=1743; i=leitao@debian.org; h=from:subject:message-id; bh=zPqCUW5FHSqjS6mCQuOQEChLaLAlO+lp/lYq9RLrTzw=; b=owEBbQKS/ZANAwAIATWjk5/8eHdtAcsmYgBoAAOn5mbT3Nh1lezkBUwPc6nTkgWY9I8QADe/b NqF4nG2MDKJAjMEAAEIAB0WIQSshTmm6PRnAspKQ5s1o5Of/Hh3bQUCaAADpwAKCRA1o5Of/Hh3 bRUxEACEhl0MyaNlAMl7LapBMzilM5wEZ5fhOFHKhqAE8PUNheAf4S/Q9nCrsoosZbMh61o92Wz tp2+6AJQUqKRyniBRgFXQAWyHTK0NXdoPaaFvsSkVwZLOlPf/MXMFWOPoCsw3iKIqk3hi5r3gp+ t+uE4dqTK4hDCuTrGPKb0knrhgRA8d9bMxV/o4PdrRrc22ZpTr2dOTDCLEO0Wg7yimYSdhbElkH g1h9uaPXCdzr+HI7LRB1JnNhJinvaXdMLkOsar1UeEs3XHPl+ESA8ebjazSLbGv0nd1lNzaR661 2yXJigRdERZdhvOZYPP6zhYxxWZeqtA5oFaHd0nQkqWCBB9X/ebR+ljRd7Q1PqyU1u/ejgVykCM RjvKrJXNBnyiumr0+yrqibPnfxWE2QvHw5kO3y+i72fHPithUtdy6GssMzfcNwA/HbVqkskXpXM NmCT7Tcuo0WwpvxSs/+GVaT1IHkjHyIyBgrNnFvtQpaKHTsC36sb3W/hJaqgPSkbeW9jK7t7vve +Q7je6NXTXFqS0BLjQK+vvLEt6J6qJuMq6I9RMCSsMDgR+vvxP9/EFEKySJBCfqlQBlluoJkzka mcxE9pB8J4Zf4AaNpTBRPF/V37XaVfen8AE4TbIvb4qQb64I4MTF8JaSJMMLto5a3x2f71b1dts EW3rcKHaoDjM4hQ== X-Developer-Key: i=leitao@debian.org; a=openpgp; fpr=AC8539A6E8F46702CA4A439B35A3939FFC78776D Add a lightweight tracepoint to monitor UDP send message operations, similar to the recently introduced tcp_sendmsg_locked() trace event in commit 0f08335ade712 ("trace: tcp: Add tracepoint for tcp_sendmsg_locked()") This implementation uses DECLARE_TRACE instead of TRACE_EVENT to avoid creating extensive trace event infrastructure and exporting to tracefs, keeping it minimal and efficient. Since this patch creates a rawtracepoint, it can be accessed using standard tracing tools like bpftrace: rawtracepoint:udp_sendmsg_tp { ... } Signed-off-by: Breno Leitao --- include/trace/events/udp.h | 5 +++++ net/ipv4/udp.c | 2 ++ 2 files changed, 7 insertions(+) --- base-commit: 1d6f4861027b451e064896f34dd0beada8871bfe change-id: 20250416-udp_sendmsg-084a32657a56 Best regards, diff --git a/include/trace/events/udp.h b/include/trace/events/udp.h index 6142be4068e29..38ab24053b6ff 100644 --- a/include/trace/events/udp.h +++ b/include/trace/events/udp.h @@ -46,6 +46,11 @@ TRACE_EVENT(udp_fail_queue_rcv_skb, __entry->saddr, __entry->daddr) ); +DECLARE_TRACE(udp_sendmsg_tp, + TP_PROTO(const struct sock *sk, const struct msghdr *msg), + TP_ARGS(sk, msg) +); + #endif /* _TRACE_UDP_H */ /* This part must be outside protection */ diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index f9f5b92cf4b61..8c2902504a399 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -1345,6 +1345,8 @@ int udp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) connected = 1; } + trace_udp_sendmsg_tp(sk, msg); + ipcm_init_sk(&ipc, inet); ipc.gso_size = READ_ONCE(up->gso_size);