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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 980B5C433F5 for ; Fri, 10 Dec 2021 19:16:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343594AbhLJTUZ (ORCPT ); Fri, 10 Dec 2021 14:20:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40718 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242642AbhLJTUZ (ORCPT ); Fri, 10 Dec 2021 14:20:25 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00B46C061746; Fri, 10 Dec 2021 11:16:50 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 93AA8B829CF; Fri, 10 Dec 2021 19:16:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 62C31C341CE; Fri, 10 Dec 2021 19:16:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1639163807; bh=LAv9uTaYn1b9AgkVDwqlGxXXoUkWf+VWqkpZ8Py2C4s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IkapLJAGRM9EXg4OftXbK8YKVbh+OjwbOwvbydTE5TxI+Zbd4fWwepcEDWUbV2OUR zAjVPXYlnRhp0qQGy0dprZk6lZ9BaeGmownF0cxFqAAydIZzKtEeZsitnJsR7l4zm1 /yd7UklvLwt2106XyMPtRwG2C9/NWmz0EcDPT11KAa5TC4J7QUgTjvS+OVEwXJp+E9 8XHHF3DutclHzmwCzCBQuyXyEYW1KvP3UCXFOTmqaTIsuZxmQkjx6cIzXkeTQ3if5V McY6/2OBX7cvVOHy8GYd6q0RfhDmMfPX5SBIBU7QCJ/ZabUaddfqdlTzqSzLApfOUq KH69iZpkEi45Q== From: Lorenzo Bianconi To: bpf@vger.kernel.org, netdev@vger.kernel.org Cc: lorenzo.bianconi@redhat.com, davem@davemloft.net, kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net, shayagr@amazon.com, john.fastabend@gmail.com, dsahern@kernel.org, brouer@redhat.com, echaudro@redhat.com, jasowang@redhat.com, alexander.duyck@gmail.com, saeed@kernel.org, maciej.fijalkowski@intel.com, magnus.karlsson@intel.com, tirthendu.sarkar@intel.com, toke@redhat.com Subject: [PATCH v20 bpf-next 21/23] bpf: selftests: introduce bpf_xdp_{load,store}_bytes selftest Date: Fri, 10 Dec 2021 20:14:28 +0100 Message-Id: <02ec4b2d3d47dd104676583b8eea2a874d87bc9a.1639162846.git.lorenzo@kernel.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Introduce kernel selftest for new bpf_xdp_{load,store}_bytes helpers. and bpf_xdp_pointer/bpf_xdp_copy_buf utility routines. Signed-off-by: Lorenzo Bianconi --- .../bpf/prog_tests/xdp_adjust_frags.c | 103 ++++++++++++++++++ .../bpf/progs/test_xdp_update_frags.c | 42 +++++++ 2 files changed, 145 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/xdp_adjust_frags.c create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_update_frags.c diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_adjust_frags.c b/tools/testing/selftests/bpf/prog_tests/xdp_adjust_frags.c new file mode 100644 index 000000000000..4b0d04fb1041 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/xdp_adjust_frags.c @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include + +void test_xdp_update_frags(void) +{ + const char *file = "./test_xdp_update_frags.o"; + __u32 duration, retval, size; + struct bpf_program *prog; + struct bpf_object *obj; + int err, prog_fd; + __u32 *offset; + __u8 *buf; + + obj = bpf_object__open(file); + if (libbpf_get_error(obj)) + return; + + prog = bpf_object__next_program(obj, NULL); + if (bpf_object__load(obj)) + return; + + prog_fd = bpf_program__fd(prog); + + buf = malloc(128); + if (CHECK(!buf, "malloc()", "error:%s\n", strerror(errno))) + goto out; + + memset(buf, 0, 128); + offset = (__u32 *)buf; + *offset = 16; + buf[*offset] = 0xaa; /* marker at offset 16 (head) */ + buf[*offset + 15] = 0xaa; /* marker at offset 31 (head) */ + + err = bpf_prog_test_run(prog_fd, 1, buf, 128, + buf, &size, &retval, &duration); + + /* test_xdp_update_frags: buf[16,31]: 0xaa -> 0xbb */ + CHECK(err || retval != XDP_PASS || buf[16] != 0xbb || buf[31] != 0xbb, + "128b", "err %d errno %d retval %d size %d\n", + err, errno, retval, size); + + free(buf); + + buf = malloc(9000); + if (CHECK(!buf, "malloc()", "error:%s\n", strerror(errno))) + goto out; + + memset(buf, 0, 9000); + offset = (__u32 *)buf; + *offset = 5000; + buf[*offset] = 0xaa; /* marker at offset 5000 (frag0) */ + buf[*offset + 15] = 0xaa; /* marker at offset 5015 (frag0) */ + + err = bpf_prog_test_run(prog_fd, 1, buf, 9000, + buf, &size, &retval, &duration); + + /* test_xdp_update_frags: buf[5000,5015]: 0xaa -> 0xbb */ + CHECK(err || retval != XDP_PASS || + buf[5000] != 0xbb || buf[5015] != 0xbb, + "9000b", "err %d errno %d retval %d size %d\n", + err, errno, retval, size); + + memset(buf, 0, 9000); + offset = (__u32 *)buf; + *offset = 3510; + buf[*offset] = 0xaa; /* marker at offset 3510 (head) */ + buf[*offset + 15] = 0xaa; /* marker at offset 3525 (frag0) */ + + err = bpf_prog_test_run(prog_fd, 1, buf, 9000, + buf, &size, &retval, &duration); + + /* test_xdp_update_frags: buf[3510,3525]: 0xaa -> 0xbb */ + CHECK(err || retval != XDP_PASS || + buf[3510] != 0xbb || buf[3525] != 0xbb, + "9000b", "err %d errno %d retval %d size %d\n", + err, errno, retval, size); + + memset(buf, 0, 9000); + offset = (__u32 *)buf; + *offset = 7606; + buf[*offset] = 0xaa; /* marker at offset 7606 (frag0) */ + buf[*offset + 15] = 0xaa; /* marker at offset 7621 (frag1) */ + + err = bpf_prog_test_run(prog_fd, 1, buf, 9000, + buf, &size, &retval, &duration); + + /* test_xdp_update_frags: buf[7606,7621]: 0xaa -> 0xbb */ + CHECK(err || retval != XDP_PASS || + buf[7606] != 0xbb || buf[7621] != 0xbb, + "9000b", "err %d errno %d retval %d size %d\n", + err, errno, retval, size); + + free(buf); +out: + bpf_object__close(obj); +} + +void test_xdp_adjust_frags(void) +{ + if (test__start_subtest("xdp_adjust_frags")) + test_xdp_update_frags(); +} diff --git a/tools/testing/selftests/bpf/progs/test_xdp_update_frags.c b/tools/testing/selftests/bpf/progs/test_xdp_update_frags.c new file mode 100644 index 000000000000..5801f05219db --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_xdp_update_frags.c @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + */ +#include +#include +#include + +int _version SEC("version") = 1; + +SEC("xdp_mb/xdp_adjust_frags") +int _xdp_adjust_frags(struct xdp_md *xdp) +{ + __u8 *data_end = (void *)(long)xdp->data_end; + __u8 *data = (void *)(long)xdp->data; + __u8 val[16] = {}; + __u32 offset; + int err; + + if (data + sizeof(__u32) > data_end) + return XDP_DROP; + + offset = *(__u32 *)data; + err = bpf_xdp_load_bytes(xdp, offset, val, sizeof(val)); + if (err < 0) + return XDP_DROP; + + if (val[0] != 0xaa || val[15] != 0xaa) /* marker */ + return XDP_DROP; + + val[0] = 0xbb; /* update the marker */ + val[15] = 0xbb; + err = bpf_xdp_store_bytes(xdp, offset, val, sizeof(val)); + if (err < 0) + return XDP_DROP; + + return XDP_PASS; +} + +char _license[] SEC("license") = "GPL"; -- 2.33.1