From nobody Thu Dec 25 05:18:31 2025 Received: from szxga05-in.huawei.com (szxga05-in.huawei.com [45.249.212.191]) (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 9BBDE17BD1; Mon, 22 Jan 2024 07:38:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.191 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705909121; cv=none; b=mrnDj/orcNUxuyXyEcY1m91zBs2Q93Z0nHXeQqo+J4FsGUTfTe8YgJLhMwynnrT5Uyx/C+JhOiRpOv7Q7ge1Yrc4/ZbLhSYAdt8qfdWy1m3Bp9Z5n+MfggCBKxLzxk5Gd2apwqCOBJ200WCUzSIM4nruFdr8byQCwVHtawfXZng= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705909121; c=relaxed/simple; bh=R+0EqFIiGaBBpGCVcH0I4eW51HMRsop2Clw0T8UHkPY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=G0dyfKuvKCnr8dr6e/eaJFAbxPO9sNiFgwdSLykWVsbBalLpbtJ/WYDr92oIGk50VfdKqHnDQSWlULQUkYlXi2pLb06Px1mYmLUItYwXUbIhmriVG4omiu4wPHi4/tdULIbhCaPRwVoLGRkevluTieVXqhvELKaEqnNloVCcgSA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.191 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.214]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4TJMRY6CBkz1FJcT; Mon, 22 Jan 2024 15:34:17 +0800 (CST) Received: from canpemm500010.china.huawei.com (unknown [7.192.105.118]) by mail.maildlp.com (Postfix) with ESMTPS id 24FAD1A0173; Mon, 22 Jan 2024 15:38:22 +0800 (CST) Received: from huawei.com (10.175.127.227) by canpemm500010.china.huawei.com (7.192.105.118) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Mon, 22 Jan 2024 15:37:39 +0800 From: Ye Bin To: , , , CC: , Subject: [PATCH v2 3/7] tracing/probes: support '%pd' type for print struct dentry's name Date: Mon, 22 Jan 2024 15:40:11 +0800 Message-ID: <20240122074015.4042575-4-yebin10@huawei.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20240122074015.4042575-1-yebin10@huawei.com> References: <20240122074015.4042575-1-yebin10@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To canpemm500010.china.huawei.com (7.192.105.118) Content-Type: text/plain; charset="utf-8" Similar to '%pd' for printk, use '%pd' for print struct dentry's name. Signed-off-by: Ye Bin --- kernel/trace/trace_kprobe.c | 6 ++++++ kernel/trace/trace_probe.h | 1 + 2 files changed, 7 insertions(+) diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index c4c6e0e0068b..00b74530fbad 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -779,6 +779,7 @@ static int __trace_kprobe_create(int argc, const char *= argv[]) char buf[MAX_EVENT_NAME_LEN]; char gbuf[MAX_EVENT_NAME_LEN]; char abuf[MAX_BTF_ARGS_LEN]; + char dbuf[MAX_DENTRY_ARGS_LEN]; struct traceprobe_parse_context ctx =3D { .flags =3D TPARG_FL_KERNEL }; =20 switch (argv[0][0]) { @@ -930,6 +931,11 @@ static int __trace_kprobe_create(int argc, const char = *argv[]) argv =3D new_argv; } =20 + ret =3D traceprobe_expand_dentry_args(argc, argv, dbuf, + MAX_DENTRY_ARGS_LEN); + if (ret) + goto out; + /* setup a probe */ tk =3D alloc_trace_kprobe(group, event, addr, symbol, offset, maxactive, argc, is_return); diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h index 553371a4e0b1..d9c053824975 100644 --- a/kernel/trace/trace_probe.h +++ b/kernel/trace/trace_probe.h @@ -34,6 +34,7 @@ #define MAX_ARRAY_LEN 64 #define MAX_ARG_NAME_LEN 32 #define MAX_BTF_ARGS_LEN 128 +#define MAX_DENTRY_ARGS_LEN 256 #define MAX_STRING_SIZE PATH_MAX #define MAX_ARG_BUF_LEN (MAX_TRACE_ARGS * MAX_ARG_NAME_LEN) =20 --=20 2.31.1