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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 2DA7EC4707F for ; Thu, 27 May 2021 20:14:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ED612613E9 for ; Thu, 27 May 2021 20:14:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235034AbhE0UPp (ORCPT ); Thu, 27 May 2021 16:15:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235606AbhE0UPm (ORCPT ); Thu, 27 May 2021 16:15:42 -0400 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18DD7C061574 for ; Thu, 27 May 2021 13:14:08 -0700 (PDT) Received: by mail-pj1-x102b.google.com with SMTP id m8-20020a17090a4148b029015fc5d36343so1155372pjg.1 for ; Thu, 27 May 2021 13:14:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=riotgames.com; s=riotgames; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Xhh14+NC5dBagYqXQ5KzOQwL64MDTeDSeZOD4eZCp18=; b=BhWoGUcPbbkqPquxLZawTEvk7ysX6Vf0AOXleX8sDNNLB5lDsXHFBuLNsc7ydGlWDX 486ouDWhKxnXjcH8tqQLD6at3CXpKeru1xNyqEEPkdMJ0CzsXuwuus3shwaLtfRAzoMQ xAsrNl8GSkSPUMc5D2X/PRmR5Yh7ATaBFBYD8= 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:mime-version:content-transfer-encoding; bh=Xhh14+NC5dBagYqXQ5KzOQwL64MDTeDSeZOD4eZCp18=; b=e63MoPD0Hm8VzUVYm1Oaq1ZsECkH7wWHrhVeZiLmCRZ6b5nvnrC4sybEx8GXp9zWV8 yD763BBuW/ysnLbg7vP0maokhQ1fhA0wL6CQb1jGJxIl8JKzmba1I3JmjyNR8pMyCyYc WoAsQmYO1k6ZO1EnhBkbsYMPEE6N9mK44CgDrgfdGnvkM6uu7jch6nvc/zq2MzeILVJs itLKQA98/jrZaM+0KVVotF664AANEY4d+SYQyV7W7vXhRkl1bCUrZeSUNthN+O8t3pUG 3Hqh4mp22dA7/2gUo/XC1F8lrIIsrcPXTblNVTgke1hfDeMaFVHmUW+rpCb2BDANpZfJ OnSw== X-Gm-Message-State: AOAM531eMfqKv0l2kHxk0PQ5tu1iNtyLiKpVhVb95YSJz9m60jHXipW0 lUpithYufdMzjkspUm3YOV2yl+lvSNFq0Q== X-Google-Smtp-Source: ABdhPJwwqsSjBJ7KD2AqUSbd/oMzGBejeXplg86FHm0PvhuQq7lMwcwqA44SzwUDrViz1WVUBAg3Ww== X-Received: by 2002:a17:903:30c4:b029:f0:ad43:4ca with SMTP id s4-20020a17090330c4b02900f0ad4304camr4631415plc.70.1622146447244; Thu, 27 May 2021 13:14:07 -0700 (PDT) Received: from ip-10-184-182-114.us-west-2.compute.internal (ec2-54-191-147-77.us-west-2.compute.amazonaws.com. [54.191.147.77]) by smtp.gmail.com with ESMTPSA id 4sm2462456pgn.31.2021.05.27.13.14.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 May 2021 13:14:06 -0700 (PDT) From: Zvi Effron To: bpf@vger.kernel.org Cc: Alexei Starovoitov , "David S. Miller" , Daniel Borkmann , Jesper Dangaard Brouer , Andrii Nakryiko , Zvi Effron , Cody Haas , Lisa Watanabe Subject: [PATCH bpf-next v2 3/3] selftests/bpf: Add test for xdp_md context in BPF_PROG_TEST_RUN Date: Thu, 27 May 2021 20:13:41 +0000 Message-Id: <20210527201341.7128-4-zeffron@riotgames.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210527201341.7128-1-zeffron@riotgames.com> References: <20210527201341.7128-1-zeffron@riotgames.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Add a test for using xdp_md as a context to BPF_PROG_TEST_RUN for XDP programs. The test uses a BPF program that takes in a return value from XDP metadata, then reduces the size of the XDP metadata by 4 bytes. Test cases validate the possible failure cases for passing in invalid xdp_md contexts, that the return value is successfully passed in, and that the adjusted metadata is successfully copied out. Co-developed-by: Cody Haas Signed-off-by: Cody Haas Co-developed-by: Lisa Watanabe Signed-off-by: Lisa Watanabe Signed-off-by: Zvi Effron --- .../bpf/prog_tests/xdp_context_test_run.c | 116 ++++++++++++++++++ .../bpf/progs/test_xdp_context_test_run.c | 20 +++ 2 files changed, 136 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_context_test_run.c diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c b/tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c new file mode 100644 index 000000000000..f6d312005b7c --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c @@ -0,0 +1,116 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include "test_xdp_context_test_run.skel.h" + +void test_xdp_context_test_run(void) +{ + struct test_xdp_context_test_run *skel = NULL; + char data[sizeof(pkt_v4) + sizeof(__u32)]; + char buf[128]; + char bad_ctx[sizeof(struct xdp_md)]; + struct xdp_md ctx_in, ctx_out; + struct bpf_test_run_opts tattr = { + .sz = sizeof(struct bpf_test_run_opts), + .data_in = &data, + .data_out = buf, + .data_size_in = sizeof(data), + .data_size_out = sizeof(buf), + .ctx_out = &ctx_out, + .ctx_size_out = sizeof(ctx_out), + .repeat = 1, + }; + int err, prog_fd; + + + skel = test_xdp_context_test_run__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel")) + return; + prog_fd = bpf_program__fd(skel->progs._xdp_context); + + *(__u32 *)data = XDP_PASS; + *(struct ipv4_packet *)(data + sizeof(__u32)) = pkt_v4; + + memset(&ctx_in, 0, sizeof(ctx_in)); + tattr.ctx_in = &ctx_in; + tattr.ctx_size_in = sizeof(ctx_in); + + tattr.ctx_in = &ctx_in; + tattr.ctx_size_in = sizeof(ctx_in); + ctx_in.data_meta = 0; + ctx_in.data = sizeof(__u32); + ctx_in.data_end = ctx_in.data + sizeof(pkt_v4); + err = bpf_prog_test_run_opts(prog_fd, &tattr); + ASSERT_OK(err, "bpf_prog_test_run(test1)"); + ASSERT_EQ(tattr.retval, XDP_PASS, "test1-retval"); + ASSERT_EQ(tattr.data_size_out, sizeof(pkt_v4), "test1-datasize"); + ASSERT_EQ(tattr.ctx_size_out, tattr.ctx_size_in, "test1-ctxsize"); + ASSERT_EQ(ctx_out.data_meta, 0, "test1-datameta"); + ASSERT_EQ(ctx_out.data, ctx_out.data_meta, "test1-data"); + ASSERT_EQ(ctx_out.data_end, sizeof(pkt_v4), "test1-dataend"); + + /* Data past the end of the kernel's struct xdp_md must be 0 */ + bad_ctx[sizeof(bad_ctx) - 1] = 1; + tattr.ctx_in = bad_ctx; + tattr.ctx_size_in = sizeof(bad_ctx); + err = bpf_prog_test_run_opts(prog_fd, &tattr); + ASSERT_ERR(err, "bpf_prog_test_run(test2)"); + ASSERT_EQ(errno, 22, "test2-errno"); + + /* The egress cannot be specified */ + ctx_in.egress_ifindex = 1; + err = bpf_prog_test_run_opts(prog_fd, &tattr); + ASSERT_ERR(err, "bpf_prog_test_run(test3)"); + ASSERT_EQ(errno, 22, "test3-errno"); + + /* data_meta must reference the start of data */ + ctx_in.data_meta = sizeof(__u32); + ctx_in.data = ctx_in.data_meta; + ctx_in.data_end = ctx_in.data + sizeof(pkt_v4); + ctx_in.egress_ifindex = 0; + err = bpf_prog_test_run_opts(prog_fd, &tattr); + ASSERT_ERR(err, "bpf_prog_test_run(test4)"); + ASSERT_EQ(errno, 22, "test4-errno"); + + /* Metadata must be 32 bytes or smaller */ + ctx_in.data_meta = 0; + ctx_in.data = sizeof(__u32)*9; + ctx_in.data_end = ctx_in.data + sizeof(pkt_v4); + err = bpf_prog_test_run_opts(prog_fd, &tattr); + ASSERT_ERR(err, "bpf_prog_test_run(test5)"); + ASSERT_EQ(errno, 22, "test5-errno"); + + /* Metadata's size must be a multiple of 4 */ + ctx_in.data = 3; + err = bpf_prog_test_run_opts(prog_fd, &tattr); + ASSERT_ERR(err, "bpf_prog_test_run(test6)"); + ASSERT_EQ(errno, 22, "test6-errno"); + + /* Total size of data must match data_end - data_meta */ + ctx_in.data = 0; + ctx_in.data_end = sizeof(pkt_v4) - 4; + err = bpf_prog_test_run_opts(prog_fd, &tattr); + ASSERT_ERR(err, "bpf_prog_test_run(test7)"); + ASSERT_EQ(errno, 22, "test7-errno"); + + ctx_in.data_end = sizeof(pkt_v4) + 4; + err = bpf_prog_test_run_opts(prog_fd, &tattr); + ASSERT_ERR(err, "bpf_prog_test_run(test8)"); + ASSERT_EQ(errno, 22, "test8-errno"); + + /* RX queue cannot be specified without specifying an ingress */ + ctx_in.data_end = sizeof(pkt_v4); + ctx_in.ingress_ifindex = 0; + ctx_in.rx_queue_index = 1; + err = bpf_prog_test_run_opts(prog_fd, &tattr); + ASSERT_ERR(err, "bpf_prog_test_run(test9)"); + ASSERT_EQ(errno, 22, "test9-errno"); + + ctx_in.ingress_ifindex = 1; + ctx_in.rx_queue_index = 1; + err = bpf_prog_test_run_opts(prog_fd, &tattr); + ASSERT_ERR(err, "bpf_prog_test_run(test10)"); + ASSERT_EQ(errno, 22, "test10-errno"); + + test_xdp_context_test_run__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/progs/test_xdp_context_test_run.c b/tools/testing/selftests/bpf/progs/test_xdp_context_test_run.c new file mode 100644 index 000000000000..56fd0995b67c --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_xdp_context_test_run.c @@ -0,0 +1,20 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include + +SEC("xdp") +int _xdp_context(struct xdp_md *xdp) +{ + void *data = (void *)(unsigned long)xdp->data; + __u32 *metadata = (void *)(unsigned long)xdp->data_meta; + __u32 ret; + + if (metadata + 1 > data) + return XDP_ABORTED; + ret = *metadata; + if (bpf_xdp_adjust_meta(xdp, 4)) + return XDP_ABORTED; + return ret; +} + +char _license[] SEC("license") = "GPL"; -- 2.31.1