From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-183.mta1.migadu.com (out-183.mta1.migadu.com [95.215.58.183]) (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 512DE23026B for ; Thu, 12 Jun 2025 11:56:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.183 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749729408; cv=none; b=EqtBqpql6k9rlbqL5ndTVC9j3BesKKPyAgaOoRAKGxRKRzn20GhuV2JtY6dXMV87N1DNNa8pKYhponmoSkGgeTEKdzKb0tZQS7FspjWyUl2hTcGMCK89BaSGo+a2PpgnnQjCj3dJjAlkJZe5m2ZfilSbHemL5gL7f4IuZhz7o1M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749729408; c=relaxed/simple; bh=xQUd6KRk/zxgbgaYPb4B2Ml8aBjLBMLlzwWH++I11kU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FT7/NU44hq9ZISHIIRtic91BOp2GfdLgVVPsuQEMTCBxikcw3OgPh9eCG1r2ZHR+vpkWYAyFWZt5ymcpKsgkNzhGZ9+2ydAzRJZNN6rcT/NABCi4AmfDzIK3V1a0EgDvoR73IzCvqRC/BfyASEroqWUQZFTQHuRy4+Th8IiUGzQ= 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=weSgil/Q; arc=none smtp.client-ip=95.215.58.183 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="weSgil/Q" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1749729394; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=NAzhY+KexUawruXmAPMa1vYXeOJqsujnp/yRg0G6Jx0=; b=weSgil/QVe084UqrgSRLaOYFpRVY3lYT+rzc6unxQr2BYkN+F0bHvlCnIGzmeBIm+DYN2m okoUygpDUa2vr6BeuToH7W2VIAG+X4+4CYjbrXBS+8V7f3vFst53G1dZnD+YSIyoVTTQF0 OgZCqXgz18APH9DZhaHHa6fYM8OlSbA= From: Tao Chen To: 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, haoluo@google.com, jolsa@kernel.org, mattbobrowski@google.com, rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com Cc: bpf@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Tao Chen Subject: [PATCH bpf-next 2/2] bpf: Add show_fdinfo for kprobe_multi Date: Thu, 12 Jun 2025 19:55:56 +0800 Message-ID: <20250612115556.295103-2-chen.dylane@linux.dev> In-Reply-To: <20250612115556.295103-1-chen.dylane@linux.dev> References: <20250612115556.295103-1-chen.dylane@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Show kprobe_multi link info with fdinfo, the info as follows: link_type: kprobe_multi link_id: 4 prog_tag: 279dd9c09dfbc757 prog_id: 30 type: kprobe_multi func_cnt: 8 missed: 0 addr: 0xffffffff81ecb1e0 cookie: 8 addr: 0xffffffff81eccb70 cookie: 2 addr: 0xffffffff81eccba0 cookie: 7 addr: 0xffffffff81eccbd0 cookie: 6 addr: 0xffffffff81eccc00 cookie: 5 addr: 0xffffffff81eccc30 cookie: 4 addr: 0xffffffff81eccc60 cookie: 3 addr: 0xffffffff81eccc90 cookie: 1 Signed-off-by: Tao Chen --- kernel/trace/bpf_trace.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index c4ad82b8fd8..6c3ffa3c1ca 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -2623,10 +2623,41 @@ static int bpf_kprobe_multi_link_fill_link_info(const struct bpf_link *link, return err; } +#ifdef CONFIG_PROC_FS +static void bpf_kprobe_multi_show_fdinfo(const struct bpf_link *link, + struct seq_file *seq) +{ + struct bpf_kprobe_multi_link *kmulti_link; + + kmulti_link = container_of(link, struct bpf_kprobe_multi_link, link); + + seq_printf(seq, + "type:\t%s\n" + "func_cnt:\t%u\n" + "missed:\t%lu\n", + kmulti_link->flags == BPF_F_KPROBE_MULTI_RETURN ? "kretprobe_multi" : + "kprobe_multi", + kmulti_link->cnt, + kmulti_link->fp.nmissed); + + for (int i = 0; i < kmulti_link->cnt; i++) { + seq_printf(seq, + "addr:\t%#lx\n" + "cookie:\t%llu\n", + kmulti_link->addrs[i], + kmulti_link->cookies[i] + ); + } +} +#endif + static const struct bpf_link_ops bpf_kprobe_multi_link_lops = { .release = bpf_kprobe_multi_link_release, .dealloc_deferred = bpf_kprobe_multi_link_dealloc, .fill_link_info = bpf_kprobe_multi_link_fill_link_info, +#ifdef CONFIG_PROC_FS + .show_fdinfo = bpf_kprobe_multi_show_fdinfo, +#endif }; static void bpf_kprobe_multi_cookie_swap(void *a, void *b, int size, const void *priv) -- 2.48.1