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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 3B197ECE58E for ; Mon, 7 Oct 2019 17:20:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1C0BF206BB for ; Mon, 7 Oct 2019 17:20:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729034AbfJGRUp (ORCPT ); Mon, 7 Oct 2019 13:20:45 -0400 Received: from mx1.redhat.com ([209.132.183.28]:25693 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728941AbfJGRUo (ORCPT ); Mon, 7 Oct 2019 13:20:44 -0400 Received: from mail-lj1-f198.google.com (mail-lj1-f198.google.com [209.85.208.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 630928E3C5 for ; Mon, 7 Oct 2019 17:20:43 +0000 (UTC) Received: by mail-lj1-f198.google.com with SMTP id j6so3726009ljb.19 for ; Mon, 07 Oct 2019 10:20:43 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:cc:date:message-id:in-reply-to :references:user-agent:mime-version:content-transfer-encoding; bh=tTxe0YBCAHRDq7AE78oRk+k8RYg6kbZEgrUi0UlHpcg=; b=KbZtDMq8bLeOn7Brj02a94Z73BpJxyVabrzLUZ6RbzKPWYGbxlexdPPWULiOdx1uQH vWi35zdjndnJ17A61kPLKmyVWDSPMD9jKFvJ1g7DrRPn6Rh6ie3CZrkzAF3KY6/JmqjY czE05Vd8MgkqWv8WUuRs+mtkXqMq7iPrpxTw613/qyjivc9s0JZMyY+QUU0tkN7KE9me yII164xZl1ofkCE25GVbwfKUwIA4lDkxXN9H0hVn4Ccvq1eKTXRgItbvo/xbobZv3ylj 6zPZBC5btrqwXPjvH1e1dRUsn6lvbyc2FTb31xz16EGqIJoRF4//eWvyMc8GkHyI4esL O1LQ== X-Gm-Message-State: APjAAAVO71y7/tGDUMrdt3t5QbSruzmVu6lzR3sUa7LlPtKvdkFvXOM2 dLuNi6NChLaeOHQ0I7mDB3HuSoxT6aqBUzztYRsSb34+U5ySDlP9+oMZvgmqdqKhHDcFhzALQLm BP61Ukzu64LGw X-Received: by 2002:a2e:8789:: with SMTP id n9mr19282000lji.52.1570468841937; Mon, 07 Oct 2019 10:20:41 -0700 (PDT) X-Google-Smtp-Source: APXvYqw4yuFLqw3buhtiSBBMrP4Eyd5VAt0ZbYU30A4FGLEUEgBxjAQKO7QI9S6+wmyEdzGHQNySGQ== X-Received: by 2002:a2e:8789:: with SMTP id n9mr19281987lji.52.1570468841795; Mon, 07 Oct 2019 10:20:41 -0700 (PDT) Received: from alrua-x1.borgediget.toke.dk ([2a00:7660:6da:443::2]) by smtp.gmail.com with ESMTPSA id 6sm2853116lfa.24.2019.10.07.10.20.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Oct 2019 10:20:40 -0700 (PDT) Received: by alrua-x1.borgediget.toke.dk (Postfix, from userid 1000) id 7761D180641; Mon, 7 Oct 2019 19:20:39 +0200 (CEST) Subject: [PATCH bpf-next v3 4/5] libbpf: Add syscall wrappers for BPF_PROG_CHAIN_* commands From: =?utf-8?q?Toke_H=C3=B8iland-J=C3=B8rgensen?= To: Daniel Borkmann Cc: Alexei Starovoitov , Martin KaFai Lau , Song Liu , Yonghong Song , Marek Majkowski , Lorenz Bauer , Alan Maguire , Jesper Dangaard Brouer , David Miller , netdev@vger.kernel.org, bpf@vger.kernel.org Date: Mon, 07 Oct 2019 19:20:39 +0200 Message-ID: <157046883940.2092443.14475136847242640757.stgit@alrua-x1> In-Reply-To: <157046883502.2092443.146052429591277809.stgit@alrua-x1> References: <157046883502.2092443.146052429591277809.stgit@alrua-x1> User-Agent: StGit/0.19-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org From: Toke Høiland-Jørgensen This adds simple syscall wrappers for the new BPF_PROG_CHAIN_* commands to libbpf. Signed-off-by: Toke Høiland-Jørgensen --- tools/lib/bpf/bpf.c | 34 ++++++++++++++++++++++++++++++++++ tools/lib/bpf/bpf.h | 4 ++++ tools/lib/bpf/libbpf.map | 3 +++ 3 files changed, 41 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index cbb933532981..23246fa169e7 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -703,3 +703,37 @@ int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len, return err; } + +int bpf_prog_chain_add(int prev_prog_fd, __u32 retcode, int next_prog_fd) { + union bpf_attr attr = {}; + + attr.prev_prog_fd = prev_prog_fd; + attr.next_prog_fd = next_prog_fd; + attr.retcode = retcode; + + return sys_bpf(BPF_PROG_CHAIN_ADD, &attr, sizeof(attr)); +} + +int bpf_prog_chain_del(int prev_prog_fd, __u32 retcode) { + union bpf_attr attr = {}; + + attr.prev_prog_fd = prev_prog_fd; + attr.retcode = retcode; + + return sys_bpf(BPF_PROG_CHAIN_DEL, &attr, sizeof(attr)); +} + +int bpf_prog_chain_get(int prev_prog_fd, __u32 retcode, __u32 *prog_id) { + union bpf_attr attr = {}; + int err; + + attr.prev_prog_fd = prev_prog_fd; + attr.retcode = retcode; + + err = sys_bpf(BPF_PROG_CHAIN_GET, &attr, sizeof(attr)); + + if (!err) + *prog_id = attr.next_prog_id; + + return err; +} diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 0db01334740f..0300cb8c8bed 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -171,6 +171,10 @@ LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len, __u32 *prog_id, __u32 *fd_type, __u64 *probe_offset, __u64 *probe_addr); +LIBBPF_API int bpf_prog_chain_add(int prev_prog_fd, __u32 retcode, int next_prog_fd); +LIBBPF_API int bpf_prog_chain_del(int prev_prog_fd, __u32 retcode); +LIBBPF_API int bpf_prog_chain_get(int prev_prog_fd, __u32 retcode, __u32 *prog_id); + #ifdef __cplusplus } /* extern "C" */ #endif diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 8d10ca03d78d..9c483c554054 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -192,4 +192,7 @@ LIBBPF_0.0.5 { } LIBBPF_0.0.4; LIBBPF_0.0.6 { + bpf_prog_chain_add; + bpf_prog_chain_del; + bpf_prog_chain_get; } LIBBPF_0.0.5;