From patchwork Thu Aug 12 16:45:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuniyuki Iwashima X-Patchwork-Id: 496454 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=-14.5 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=unavailable 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 BC8E0C4320A for ; Thu, 12 Aug 2021 16:46:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A367760F00 for ; Thu, 12 Aug 2021 16:46:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232823AbhHLQqo (ORCPT ); Thu, 12 Aug 2021 12:46:44 -0400 Received: from smtp-fw-6001.amazon.com ([52.95.48.154]:10384 "EHLO smtp-fw-6001.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232081AbhHLQqn (ORCPT ); Thu, 12 Aug 2021 12:46:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.co.jp; i=@amazon.co.jp; q=dns/txt; s=amazon201209; t=1628786778; x=1660322778; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=ycxoFeaBELcdmGM0X/rv4plXoec2fOvTxJKPjKags8k=; b=VW1r0fz0BEwJCgwJlT4Mm9CvEZ1GZu7UEsz+YJX/3G6U10jkbriVEia5 DpQjqPPQspNy2uY4Bic71rFJ4bGCtqeDw+VPL3d/MXeRiRzggSwIQf+/N UiG55RzYNdMggWInRasVrjWnrclx7XjtGGGrBo56DX99YHmLmTDM4MKpo s=; X-IronPort-AV: E=Sophos;i="5.84,316,1620691200"; d="scan'208";a="133517682" Received: from iad12-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-2b-5bdc5131.us-west-2.amazon.com) ([10.43.8.6]) by smtp-border-fw-6001.iad6.amazon.com with ESMTP; 12 Aug 2021 16:46:16 +0000 Received: from EX13MTAUWB001.ant.amazon.com (pdx1-ws-svc-p6-lb9-vlan3.pdx.amazon.com [10.236.137.198]) by email-inbound-relay-2b-5bdc5131.us-west-2.amazon.com (Postfix) with ESMTPS id 283C8A07B2; Thu, 12 Aug 2021 16:46:15 +0000 (UTC) Received: from EX13D04ANC001.ant.amazon.com (10.43.157.89) by EX13MTAUWB001.ant.amazon.com (10.43.161.207) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Thu, 12 Aug 2021 16:46:14 +0000 Received: from 88665a182662.ant.amazon.com (10.43.161.153) by EX13D04ANC001.ant.amazon.com (10.43.157.89) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Thu, 12 Aug 2021 16:46:09 +0000 From: Kuniyuki Iwashima To: "David S. Miller" , Jakub Kicinski , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , "Song Liu" , Yonghong Song , John Fastabend , KP Singh CC: Benjamin Herrenschmidt , Kuniyuki Iwashima , Kuniyuki Iwashima , , Subject: [PATCH v5 bpf-next 0/4] BPF iterator for UNIX domain socket. Date: Fri, 13 Aug 2021 01:45:53 +0900 Message-ID: <20210812164557.79046-1-kuniyu@amazon.co.jp> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-Originating-IP: [10.43.161.153] X-ClientProxiedBy: EX13d09UWA003.ant.amazon.com (10.43.160.227) To EX13D04ANC001.ant.amazon.com (10.43.157.89) Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch set adds BPF iterator support for UNIX domain socket. The first patch implements it, and the second adds "%c" support for BPF_SEQ_PRINTF(). Changelog: v5: - Align header line of bpf_iter_unix.c - Add test for "%c" v4: https://lore.kernel.org/netdev/20210810092807.13190-1-kuniyu@amazon.co.jp/ - Check IS_BUILTIN(CONFIG_UNIX) - Support "%c" in BPF_SEQ_PRINTF() - Uncomment the code to print the name of the abstract socket - Mention the LLVM fix in README.rst - Remove the 'aligned' attribute in bpf_iter.h - Keep the format string on a single line v3: https://lore.kernel.org/netdev/20210804070851.97834-1-kuniyu@amazon.co.jp/ - Export some functions for CONFIG_UNIX=m v2: https://lore.kernel.org/netdev/20210803011110.21205-1-kuniyu@amazon.co.jp/ - Implement bpf_iter specific seq_ops->stop() - Add bpf_iter__unix in bpf_iter.h - Move common definitions in selftest to bpf_tracing_net.h - Include the code for abstract UNIX domain socket as comment in selftest - Use ASSERT_OK_PTR() instead of CHECK() - Make ternary operators on single line v1: https://lore.kernel.org/netdev/20210729233645.4869-1-kuniyu@amazon.co.jp/ Kuniyuki Iwashima (4): bpf: af_unix: Implement BPF iterator for UNIX domain socket. bpf: Support "%c" in bpf_bprintf_prepare(). selftest/bpf: Implement sample UNIX domain socket iterator program. selftest/bpf: Extend the bpf_snprintf() test for "%c". include/linux/btf_ids.h | 3 +- kernel/bpf/helpers.c | 14 +++ net/unix/af_unix.c | 93 +++++++++++++++++++ tools/testing/selftests/bpf/README.rst | 38 ++++++++ .../selftests/bpf/prog_tests/bpf_iter.c | 16 ++++ .../selftests/bpf/prog_tests/snprintf.c | 4 +- tools/testing/selftests/bpf/progs/bpf_iter.h | 8 ++ .../selftests/bpf/progs/bpf_iter_unix.c | 77 +++++++++++++++ .../selftests/bpf/progs/bpf_tracing_net.h | 4 + .../selftests/bpf/progs/test_snprintf.c | 7 +- 10 files changed, 259 insertions(+), 5 deletions(-) create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_unix.c