From patchwork Fri Feb 11 07:39:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yonghong Song X-Patchwork-Id: 12742979 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 664C3C433F5 for ; Fri, 11 Feb 2022 07:39:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347704AbiBKHjX (ORCPT ); Fri, 11 Feb 2022 02:39:23 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:48560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238586AbiBKHjW (ORCPT ); Fri, 11 Feb 2022 02:39:22 -0500 Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com [67.231.145.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0210CB5 for ; Thu, 10 Feb 2022 23:39:21 -0800 (PST) Received: from pps.filterd (m0044010.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 21ANrKut001235 for ; Thu, 10 Feb 2022 23:39:21 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=facebook; bh=f1pHNkdRvSOCcBG+PcG8CNa1hCbjwASO8Aak2fJTFZ8=; b=hxMsp+UQ8/97+6zLEYz6d0AYQfUxbEiUq/1hZXXnne53M79no+5Y7uGXNewXwBFYr8MK 3Wb+vtMzmTlAdiqqchQJJFyB7/0r79rSS0QAxserxRIfaxBMxlIZZEHjPMBuTeBJnCOL jfdAx4nZPA/pH1PLw25PbC2AerxQzEetob8= Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3e58mhutxd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 10 Feb 2022 23:39:21 -0800 Received: from twshared22811.39.frc1.facebook.com (2620:10d:c085:108::4) by mail.thefacebook.com (2620:10d:c085:11d::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Thu, 10 Feb 2022 23:39:20 -0800 Received: by devbig309.ftw3.facebook.com (Postfix, from userid 128203) id B5CF063DB632; Thu, 10 Feb 2022 23:39:13 -0800 (PST) From: Yonghong Song To: CC: Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , , Kumar Kartikeya Dwivedi Subject: [PATCH bpf 2/2] bpf: emit bpf_timer in vmlinux BTF Date: Thu, 10 Feb 2022 23:39:13 -0800 Message-ID: <20220211073913.3455777-1-yhs@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220211073903.3455193-1-yhs@fb.com> References: <20220211073903.3455193-1-yhs@fb.com> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-GUID: _DQv8thaJQ4EVuh28GPdfxv0dqwBRbmM X-Proofpoint-ORIG-GUID: _DQv8thaJQ4EVuh28GPdfxv0dqwBRbmM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-11_02,2022-02-09_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=fb_outbound_notspam policy=fb_outbound score=0 bulkscore=0 mlxscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 mlxlogscore=710 suspectscore=0 priorityscore=1501 phishscore=0 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202110043 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Previously, the following code in check_and_init_map_value() *(struct bpf_timer *)(dst + map->timer_off) = (struct bpf_timer){}; can help generate bpf_timer definition in vmlinuxBTF. But previous patch replaced the above code with memset so bpf_timer definition disappears from vmlinuxBTF. Let us emit the type explicitly so bpf program can continue to use it from vmlinux.h. Signed-off-by: Yonghong Song --- kernel/bpf/helpers.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 4e5969fde0b3..d7fc3c270a4c 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -17,6 +17,7 @@ #include #include #include +#include #include "../../lib/kstrtox.h" @@ -1109,6 +1110,7 @@ static enum hrtimer_restart bpf_timer_cb(struct hrtimer *hrtimer) void *key; u32 idx; + BTF_TYPE_EMIT(struct bpf_timer); callback_fn = rcu_dereference_check(t->callback_fn, rcu_read_lock_bh_held()); if (!callback_fn) goto out;