From patchwork Tue Dec 15 23:36:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Liu X-Patchwork-Id: 344859 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E537AC2BBCA for ; Wed, 16 Dec 2020 00:05:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B255F22D05 for ; Wed, 16 Dec 2020 00:05:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727786AbgLPABR (ORCPT ); Tue, 15 Dec 2020 19:01:17 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:26964 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725891AbgLOXhu (ORCPT ); Tue, 15 Dec 2020 18:37:50 -0500 Received: from pps.filterd (m0109334.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 0BFNXs4M014559 for ; Tue, 15 Dec 2020 15:37:10 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=facebook; bh=hVyq3HKrK0Kj2ubm+BrL8q5u+GsKxQh011dEhg13BoU=; b=dUWUZYdwBXf1XpeQ7m1xF2ElI5Q3bbSuumWRPwao+PaoafxoG7DStYhx1Yla1dCUj1tc b/jv9b52xD9W+WcVqLNfvJXvuU+PvbvZhqTUnrxofKOkPu1fCTKxYjqmOPoYki7/N3sM XLC62FM4KTk2IHwdeiRuZaQsbBbi4luhFaA= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 35descp5xv-7 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Tue, 15 Dec 2020 15:37:10 -0800 Received: from intmgw002.08.frc2.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Tue, 15 Dec 2020 15:37:06 -0800 Received: by devbig006.ftw2.facebook.com (Postfix, from userid 4523) id 23F3962E56FB; Tue, 15 Dec 2020 15:37:05 -0800 (PST) From: Song Liu To: , CC: , , , , , , Song Liu Subject: [PATCH v2 bpf-next 0/4] introduce bpf_iter for task_vma Date: Tue, 15 Dec 2020 15:36:58 -0800 Message-ID: <20201215233702.3301881-1-songliubraving@fb.com> X-Mailer: git-send-email 2.24.1 MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2020-12-15_13:2020-12-15,2020-12-15 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 suspectscore=0 malwarescore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 spamscore=0 mlxlogscore=540 phishscore=0 impostorscore=0 clxscore=1015 mlxscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012150159 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This set introduces bpf_iter for task_vma, which can be used to generate information similar to /proc/pid/maps or /proc/pid/smaps. Patch 4/4 adds an example that mimics /proc/pid/maps. Changes v1 => v2: 1. Small fixes in task_iter.c and the selftests. (Yonghong) Song Liu (4): bpf: introduce task_vma bpf_iter bpf: allow bpf_d_path in sleepable bpf_iter program libbpf: introduce section "iter.s/" for sleepable bpf_iter program selftests/bpf: add test for bpf_iter_task_vma include/linux/bpf.h | 2 +- kernel/bpf/task_iter.c | 205 +++++++++++++++++- kernel/trace/bpf_trace.c | 5 + tools/lib/bpf/libbpf.c | 5 + .../selftests/bpf/prog_tests/bpf_iter.c | 106 ++++++++- tools/testing/selftests/bpf/progs/bpf_iter.h | 9 + .../selftests/bpf/progs/bpf_iter_task_vma.c | 55 +++++ 7 files changed, 375 insertions(+), 12 deletions(-) create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_task_vma.c --- 2.24.1