From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 D1C7BC3A59D for ; Tue, 20 Aug 2019 09:32:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A8E8922CF9 for ; Tue, 20 Aug 2019 09:32:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=netronome-com.20150623.gappssmtp.com header.i=@netronome-com.20150623.gappssmtp.com header.b="YI8oZp1K" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729458AbfHTJcP (ORCPT ); Tue, 20 Aug 2019 05:32:15 -0400 Received: from mail-wm1-f67.google.com ([209.85.128.67]:35706 "EHLO mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729469AbfHTJcN (ORCPT ); Tue, 20 Aug 2019 05:32:13 -0400 Received: by mail-wm1-f67.google.com with SMTP id l2so2025396wmg.0 for ; Tue, 20 Aug 2019 02:32:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=netronome-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=pjQJTm51JkN1A78/vK4czcd3hJPplZhrhZWA1hkQGDk=; b=YI8oZp1KNEADrGQzs3cVCzDFZVHS6CubNpFCu/+sao75g8+BYMAoqXZs1V/tdzRbqu yHb+hQrb21jKhYVGSxXdm0uQOixo83mDJa4whEXhjif3d+4BCCoMfGn84EJGvuix3vvk mWKkc2cebuAFhk4pyZ5uxiG2DENcGvxqNCH5GdkhPL7vH5TRz15NKoZ2uO8nNNKr2Nbw ksiZfDVzZOWQRYxogf335RRAh29uehiUMIFhhV6Hivx7bAlORfzN4xpfhLFAUkJMjiL1 aHd5m2VfzEfmH4jPRTUcBRnRyUx0B/mtkgZILv6laNoanz9pn6xRV42XDZTbe4e5+Z7h xKMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=pjQJTm51JkN1A78/vK4czcd3hJPplZhrhZWA1hkQGDk=; b=PrjvpNl2xjDSbkNXd44zOa2ZH/zB+UbYDmNaJd1LIBB2Z6mXKKByELRsnewmyCNq0s e2Psma6o3NXC/kBLtgeEsdsjFRLxHbosrhlqWRRdvRLk1s6CHP+P5TbBLzlpBsdUbJm3 WsBXxoExEbnCIjOxFyJ+1XHOjG++mR5sRom0w620d5YNhZ8jq9dUdv6dfZkq7XbN5WLh fRWoziz8HFXHdBt0tKfCbVD915We4f/s8FDmBOKjpfTghXOmbPC4+4jPjnk6rC+8G2eg Z/POJdsS/EBi/0NFtNRlLekk5i/gg2NmYr6KnC/hVjzaO3nB0l6c6JUJ0Vxp0Gomvw54 3NUQ== X-Gm-Message-State: APjAAAXtgl0kmnSQ6A/jUbOhOf37EjXYrdPzGNTMEKBHqBkh3QonVYjH gqsUz5FN4xJHanbHJ5i31Gbpfw== X-Google-Smtp-Source: APXvYqycU89JhrsIz1RtF0WtFBhU5Y749iJCFMyWW3NxS8A0T5cTwwgxNA1BUoyerZWJW8298Y3i6A== X-Received: by 2002:a1c:f910:: with SMTP id x16mr7663957wmh.173.1566293531083; Tue, 20 Aug 2019 02:32:11 -0700 (PDT) Received: from cbtest32.netronome.com ([217.38.71.146]) by smtp.gmail.com with ESMTPSA id p9sm16128190wru.61.2019.08.20.02.32.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Aug 2019 02:32:10 -0700 (PDT) From: Quentin Monnet To: Alexei Starovoitov , Daniel Borkmann Cc: bpf@vger.kernel.org, netdev@vger.kernel.org, oss-drivers@netronome.com, Quentin Monnet Subject: [PATCH bpf-next v2 4/5] libbpf: add bpf_btf_get_next_id() to cycle through BTF objects Date: Tue, 20 Aug 2019 10:31:53 +0100 Message-Id: <20190820093154.14042-5-quentin.monnet@netronome.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190820093154.14042-1-quentin.monnet@netronome.com> References: <20190820093154.14042-1-quentin.monnet@netronome.com> Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Add an API function taking a BTF object id and providing the id of the next BTF object in the kernel. This can be used to list all BTF objects loaded on the system. v2: - Rebase on top of Andrii's changes regarding libbpf versioning. Signed-off-by: Quentin Monnet Reviewed-by: Jakub Kicinski --- tools/lib/bpf/bpf.c | 5 +++++ tools/lib/bpf/bpf.h | 1 + tools/lib/bpf/libbpf.map | 2 ++ 3 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 1439e99c9be5..cbb933532981 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -593,6 +593,11 @@ int bpf_map_get_next_id(__u32 start_id, __u32 *next_id) return bpf_obj_get_next_id(start_id, next_id, BPF_MAP_GET_NEXT_ID); } +int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id) +{ + return bpf_obj_get_next_id(start_id, next_id, BPF_BTF_GET_NEXT_ID); +} + int bpf_prog_get_fd_by_id(__u32 id) { union bpf_attr attr; diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index ff42ca043dc8..0db01334740f 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -156,6 +156,7 @@ LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 *retval, __u32 *duration); LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id); LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id); +LIBBPF_API int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id); LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id); LIBBPF_API int bpf_map_get_fd_by_id(__u32 id); LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id); diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 4e72df8e98ba..664ce8e7a60e 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -186,4 +186,6 @@ LIBBPF_0.0.4 { } LIBBPF_0.0.3; LIBBPF_0.0.5 { + global: + bpf_btf_get_next_id; } LIBBPF_0.0.4; -- 2.17.1