From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-170.mta1.migadu.com (out-170.mta1.migadu.com [95.215.58.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AA4C32DCBFA for ; Sun, 1 Jun 2025 06:58:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748761092; cv=none; b=lnt2WorJYkMO0CBk2MCrlm8Z7SkTtrfVPH/R1lvRVxJLrDM96mioINMJQG8ajjhLBhiraqqnWarDjHl6ZZTPG5WzHNdK1JrlhUwZMO1JWAKUaEKXrsc7Vd7dpjpMAcMlRNjs+VcU220dP4J2b5OLLfbS5IZt5qkHAk+6r1qPMvg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748761092; c=relaxed/simple; bh=eSUi6mmwtriXuiK98d3JawAKXWxnhpANAYkppm1QY7Y=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=SjAodoOz1CwP/M/t6XJKHYqAVTuQoe+VtYfTt6tvSVfKy0t3fm5lNHcj35zmbBhYcQ5ryahHZWZrHTNAlYzYv19D4K0h61rsUbRDabAATOyvkPTYv4oixCoKvbZGj9aj3c9knEuBHxvTIB5ivlV/+8NlE0906SFzhTixXuPON3g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=Wg4BCu68; arc=none smtp.client-ip=95.215.58.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="Wg4BCu68" Message-ID: <44c3a765-4300-44c8-a3fb-eef8f4b7c39f@linux.dev> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1748761084; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=dYg4W8sQIGZJe7GW8WiUziY9FirriCAkkpB+aVxZCdk=; b=Wg4BCu6828ffzhpti/R5N1sjQ2d8nk63y1px0GVrXVbFRmFa4AzELhRagJRLEOKacDEySI QXjR1+2EdttnBcyctmxQSiYFvvLrGzOQL3e1BmwHVxu6kc7/XGL4ycQkFcTachYzZIIpKU 8hClrSUc5s0Fg0mbGAPo5tE80dwIi5w= Date: Sun, 1 Jun 2025 14:57:39 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [PATCH bpf-next 1/3] bpf: Add cookie to raw_tp bpf_link_info To: Jiri Olsa Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me, qmo@kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250529165759.2536245-1-chen.dylane@linux.dev> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Tao Chen In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT 在 2025/5/31 16:30, Jiri Olsa 写道: > On Fri, May 30, 2025 at 12:57:57AM +0800, Tao Chen wrote: >> After commit 68ca5d4eebb8 ("bpf: support BPF cookie in raw tracepoint >> (raw_tp, tp_btf) programs"), we can show the cookie in bpf_link_info >> like kprobe etc. >> >> Signed-off-by: Tao Chen >> --- >> include/uapi/linux/bpf.h | 1 + >> kernel/bpf/syscall.c | 1 + >> tools/include/uapi/linux/bpf.h | 1 + >> 3 files changed, 3 insertions(+) >> >> diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h >> index 07ee73cdf9..7d0ad5c2b6 100644 >> --- a/include/uapi/linux/bpf.h >> +++ b/include/uapi/linux/bpf.h >> @@ -6644,6 +6644,7 @@ struct bpf_link_info { >> struct { >> __aligned_u64 tp_name; /* in/out: tp_name buffer ptr */ >> __u32 tp_name_len; /* in/out: tp_name buffer len */ > > there's hole now in here, let's add something like > > __u32 reserved; > Sounds good, i will add it in v2, thanks. > jirka > > >> + __u64 cookie; >> } raw_tracepoint; >> struct { >> __u32 attach_type; >> diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c >> index 9794446bc8..1c3dbe44ac 100644 >> --- a/kernel/bpf/syscall.c >> +++ b/kernel/bpf/syscall.c >> @@ -3687,6 +3687,7 @@ static int bpf_raw_tp_link_fill_link_info(const struct bpf_link *link, >> return -EINVAL; >> >> info->raw_tracepoint.tp_name_len = tp_len + 1; >> + info->raw_tracepoint.cookie = raw_tp_link->cookie; >> >> if (!ubuf) >> return 0; >> diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h >> index 07ee73cdf9..7d0ad5c2b6 100644 >> --- a/tools/include/uapi/linux/bpf.h >> +++ b/tools/include/uapi/linux/bpf.h >> @@ -6644,6 +6644,7 @@ struct bpf_link_info { >> struct { >> __aligned_u64 tp_name; /* in/out: tp_name buffer ptr */ >> __u32 tp_name_len; /* in/out: tp_name buffer len */ >> + __u64 cookie; >> } raw_tracepoint; >> struct { >> __u32 attach_type; >> -- >> 2.43.0 >> -- Best Regards Tao Chen