From patchwork Thu Sep 1 11:48:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maciej Fijalkowski X-Patchwork-Id: 12962344 X-Patchwork-Delegate: bpf@iogearbox.net 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 29049C0502C for ; Thu, 1 Sep 2022 11:48:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232988AbiIALsy (ORCPT ); Thu, 1 Sep 2022 07:48:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58780 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232992AbiIALsc (ORCPT ); Thu, 1 Sep 2022 07:48:32 -0400 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E738613A7CC; Thu, 1 Sep 2022 04:48:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1662032909; x=1693568909; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=QtBWM/ZPc7lBL5BmlSAfsB52xAOnBTfGdarlV2Z7VkI=; b=hSCH6Wb8KWA0T45LIbN0dDq4dlCF3sLzPx+b3dGY1Ry+9C7V5w/Sv8Oo uheYd7Tnyg0IWZ0E037MIyqH0gLGWYTDT0/J/MgJnKAjN/kW3IObASXPA 3YVgxloxh8sNB//0Mi9jajHcLn7WHA0DmCYNInJsKw+lyq5qIvpvFu9ia 8FJGxXu1D/0IBBVCw1oK7gvEnKJkvRJ53vspKznScznpF0MwgeFxYG6U5 KU8X/DQjSPMyVUHW+ppfJ4h6jocJsAYjS62zfz2qsSq4FdQ+WEeKxa3f+ kDxXs0ZZL2U46VBZMGvoaZx0lOY945SJeLmcpnFA40tAr4bEcTKWq4eyx Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10456"; a="357410381" X-IronPort-AV: E=Sophos;i="5.93,280,1654585200"; d="scan'208";a="357410381" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Sep 2022 04:48:27 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,280,1654585200"; d="scan'208";a="673814378" Received: from boxer.igk.intel.com ([10.102.20.173]) by fmsmga008.fm.intel.com with ESMTP; 01 Sep 2022 04:48:25 -0700 From: Maciej Fijalkowski To: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org Cc: netdev@vger.kernel.org, magnus.karlsson@intel.com, bjorn@kernel.org, john.fastabend@gmail.com, Maciej Fijalkowski Subject: [PATCH v6 bpf-next 4/6] selftests: xsk: add support for executing tests on physical device Date: Thu, 1 Sep 2022 13:48:11 +0200 Message-Id: <20220901114813.16275-5-maciej.fijalkowski@intel.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220901114813.16275-1-maciej.fijalkowski@intel.com> References: <20220901114813.16275-1-maciej.fijalkowski@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Currently, architecture of xdpxceiver is designed strictly for conducting veth based tests. Veth pair is created together with a network namespace and one of the veth interfaces is moved to the mentioned netns. Then, separate threads for Tx and Rx are spawned which will utilize described setup. Infrastructure described in the paragraph above can not be used for testing AF_XDP support on physical devices. That testing will be conducted on a single network interface and same queue. Xskxceiver needs to be extended to distinguish between veth tests and physical interface tests. Since same iface/queue id pair will be used by both Tx/Rx threads for physical device testing, Tx thread, which happen to run after the Rx thread, is going to create XSK socket with shared umem flag. In order to track this setting throughout the lifetime of spawned threads, introduce 'shared_umem' boolean variable to struct ifobject and set it to true when xdpxceiver is run against physical device. In such case, UMEM size needs to be doubled, so half of it will be used by Rx thread and other half by Tx thread. For two step based test types, value of XSKMAP element under key 0 has to be updated as there is now another socket for the second step. Also, to avoid race conditions when destroying XSK resources, move this activity to the main thread after spawned Rx and Tx threads have finished its job. This way it is possible to gracefully remove shared umem without introducing synchronization mechanisms. To run xsk selftests suite on physical device, append "-i $IFACE" when invoking test_xsk.sh. For veth based tests, simply skip it. When "-i $IFACE" is in place, under the hood test_xsk.sh will use $IFACE for both interfaces supplied to xdpxceiver, which in turn will interpret that this execution of test suite is for a physical device. Note that currently this makes it possible only to test SKB and DRV mode (in case underlying device has native XDP support). ZC testing support is added in a later patch. Acked-by: Magnus Karlsson Signed-off-by: Maciej Fijalkowski --- tools/testing/selftests/bpf/test_xsk.sh | 52 ++++-- tools/testing/selftests/bpf/xskxceiver.c | 204 +++++++++++++++-------- tools/testing/selftests/bpf/xskxceiver.h | 1 + 3 files changed, 170 insertions(+), 87 deletions(-) diff --git a/tools/testing/selftests/bpf/test_xsk.sh b/tools/testing/selftests/bpf/test_xsk.sh index 096a957594cd..d821fd098504 100755 --- a/tools/testing/selftests/bpf/test_xsk.sh +++ b/tools/testing/selftests/bpf/test_xsk.sh @@ -73,14 +73,20 @@ # # Run and dump packet contents: # sudo ./test_xsk.sh -D +# +# Run test suite for physical device in loopback mode +# sudo ./test_xsk.sh -i IFACE . xsk_prereqs.sh -while getopts "vD" flag +ETH="" + +while getopts "vDi:" flag do case "${flag}" in v) verbose=1;; D) dump_pkts=1;; + i) ETH=${OPTARG};; esac done @@ -132,18 +138,25 @@ setup_vethPairs() { ip link set ${VETH0} up } -validate_root_exec -validate_veth_support ${VETH0} -validate_ip_utility -setup_vethPairs - -retval=$? -if [ $retval -ne 0 ]; then - test_status $retval "${TEST_NAME}" - cleanup_exit ${VETH0} ${VETH1} ${NS1} - exit $retval +if [ ! -z $ETH ]; then + VETH0=${ETH} + VETH1=${ETH} + NS1="" +else + validate_root_exec + validate_veth_support ${VETH0} + validate_ip_utility + setup_vethPairs + + retval=$? + if [ $retval -ne 0 ]; then + test_status $retval "${TEST_NAME}" + cleanup_exit ${VETH0} ${VETH1} ${NS1} + exit $retval + fi fi + if [[ $verbose -eq 1 ]]; then ARGS+="-v " fi @@ -152,26 +165,33 @@ if [[ $dump_pkts -eq 1 ]]; then ARGS="-D " fi +retval=$? test_status $retval "${TEST_NAME}" ## START TESTS statusList=() -TEST_NAME="XSK_SELFTESTS_SOFTIRQ" +TEST_NAME="XSK_SELFTESTS_${VETH0}_SOFTIRQ" exec_xskxceiver -cleanup_exit ${VETH0} ${VETH1} ${NS1} -TEST_NAME="XSK_SELFTESTS_BUSY_POLL" +if [ -z $ETH ]; then + cleanup_exit ${VETH0} ${VETH1} ${NS1} +fi +TEST_NAME="XSK_SELFTESTS_${VETH0}_BUSY_POLL" busy_poll=1 -setup_vethPairs +if [ -z $ETH ]; then + setup_vethPairs +fi exec_xskxceiver ## END TESTS -cleanup_exit ${VETH0} ${VETH1} ${NS1} +if [ -z $ETH ]; then + cleanup_exit ${VETH0} ${VETH1} ${NS1} +fi failures=0 echo -e "\nSummary:" diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c index fbf65135fef6..b54b844cae89 100644 --- a/tools/testing/selftests/bpf/xskxceiver.c +++ b/tools/testing/selftests/bpf/xskxceiver.c @@ -301,8 +301,8 @@ static void enable_busy_poll(struct xsk_socket_info *xsk) exit_with_error(errno); } -static int xsk_configure_socket(struct xsk_socket_info *xsk, struct xsk_umem_info *umem, - struct ifobject *ifobject, bool shared) +static int __xsk_configure_socket(struct xsk_socket_info *xsk, struct xsk_umem_info *umem, + struct ifobject *ifobject, bool shared) { struct xsk_socket_config cfg = {}; struct xsk_ring_cons *rxr; @@ -448,6 +448,9 @@ static void __test_spec_init(struct test_spec *test, struct ifobject *ifobj_tx, memset(ifobj->umem, 0, sizeof(*ifobj->umem)); ifobj->umem->num_frames = DEFAULT_UMEM_BUFFERS; ifobj->umem->frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE; + if (ifobj->shared_umem && ifobj->rx_on) + ifobj->umem->base_addr = DEFAULT_UMEM_BUFFERS * + XSK_UMEM__DEFAULT_FRAME_SIZE; for (j = 0; j < MAX_SOCKETS; j++) { memset(&ifobj->xsk_arr[j], 0, sizeof(ifobj->xsk_arr[j])); @@ -1146,6 +1149,70 @@ static int validate_tx_invalid_descs(struct ifobject *ifobject) return TEST_PASS; } +static void xsk_configure_socket(struct test_spec *test, struct ifobject *ifobject, + struct xsk_umem_info *umem, bool tx) +{ + int i, ret; + + for (i = 0; i < test->nb_sockets; i++) { + bool shared = (ifobject->shared_umem && tx) ? true : !!i; + u32 ctr = 0; + + while (ctr++ < SOCK_RECONF_CTR) { + ret = __xsk_configure_socket(&ifobject->xsk_arr[i], umem, + ifobject, shared); + if (!ret) + break; + + /* Retry if it fails as xsk_socket__create() is asynchronous */ + if (ctr >= SOCK_RECONF_CTR) + exit_with_error(-ret); + usleep(USLEEP_MAX); + } + if (ifobject->busy_poll) + enable_busy_poll(&ifobject->xsk_arr[i]); + } +} + +static void thread_common_ops_tx(struct test_spec *test, struct ifobject *ifobject) +{ + xsk_configure_socket(test, ifobject, test->ifobj_rx->umem, true); + ifobject->xsk = &ifobject->xsk_arr[0]; + ifobject->xsk_map_fd = test->ifobj_rx->xsk_map_fd; + memcpy(ifobject->umem, test->ifobj_rx->umem, sizeof(struct xsk_umem_info)); +} + +static void xsk_populate_fill_ring(struct xsk_umem_info *umem, struct pkt_stream *pkt_stream) +{ + u32 idx = 0, i, buffers_to_fill; + int ret; + + if (umem->num_frames < XSK_RING_PROD__DEFAULT_NUM_DESCS) + buffers_to_fill = umem->num_frames; + else + buffers_to_fill = XSK_RING_PROD__DEFAULT_NUM_DESCS; + + ret = xsk_ring_prod__reserve(&umem->fq, buffers_to_fill, &idx); + if (ret != buffers_to_fill) + exit_with_error(ENOSPC); + for (i = 0; i < buffers_to_fill; i++) { + u64 addr; + + if (pkt_stream->use_addr_for_fill) { + struct pkt *pkt = pkt_stream_get_pkt(pkt_stream, i); + + if (!pkt) + break; + addr = pkt->addr; + } else { + addr = i * umem->frame_size; + } + + *xsk_ring_prod__fill_addr(&umem->fq, idx++) = addr; + } + xsk_ring_prod__submit(&umem->fq, buffers_to_fill); +} + static void thread_common_ops(struct test_spec *test, struct ifobject *ifobject) { u64 umem_sz = ifobject->umem->num_frames * ifobject->umem->frame_size; @@ -1153,13 +1220,15 @@ static void thread_common_ops(struct test_spec *test, struct ifobject *ifobject) LIBBPF_OPTS(bpf_xdp_query_opts, opts); int ret, ifindex; void *bufs; - u32 i; ifobject->ns_fd = switch_namespace(ifobject->nsname); if (ifobject->umem->unaligned_mode) mmap_flags |= MAP_HUGETLB; + if (ifobject->shared_umem) + umem_sz *= 2; + bufs = mmap(NULL, umem_sz, PROT_READ | PROT_WRITE, mmap_flags, -1, 0); if (bufs == MAP_FAILED) exit_with_error(errno); @@ -1168,24 +1237,9 @@ static void thread_common_ops(struct test_spec *test, struct ifobject *ifobject) if (ret) exit_with_error(-ret); - for (i = 0; i < test->nb_sockets; i++) { - u32 ctr = 0; - - while (ctr++ < SOCK_RECONF_CTR) { - ret = xsk_configure_socket(&ifobject->xsk_arr[i], ifobject->umem, - ifobject, !!i); - if (!ret) - break; - - /* Retry if it fails as xsk_socket__create() is asynchronous */ - if (ctr >= SOCK_RECONF_CTR) - exit_with_error(-ret); - usleep(USLEEP_MAX); - } + xsk_populate_fill_ring(ifobject->umem, ifobject->pkt_stream); - if (ifobject->busy_poll) - enable_busy_poll(&ifobject->xsk_arr[i]); - } + xsk_configure_socket(test, ifobject, ifobject->umem, false); ifobject->xsk = &ifobject->xsk_arr[0]; @@ -1221,22 +1275,18 @@ static void thread_common_ops(struct test_spec *test, struct ifobject *ifobject) exit_with_error(-ret); } -static void testapp_cleanup_xsk_res(struct ifobject *ifobj) -{ - print_verbose("Destroying socket\n"); - xsk_socket__delete(ifobj->xsk->xsk); - munmap(ifobj->umem->buffer, ifobj->umem->num_frames * ifobj->umem->frame_size); - xsk_umem__delete(ifobj->umem->umem); -} - static void *worker_testapp_validate_tx(void *arg) { struct test_spec *test = (struct test_spec *)arg; struct ifobject *ifobject = test->ifobj_tx; int err; - if (test->current_step == 1) - thread_common_ops(test, ifobject); + if (test->current_step == 1) { + if (!ifobject->shared_umem) + thread_common_ops(test, ifobject); + else + thread_common_ops_tx(test, ifobject); + } print_verbose("Sending %d packets on interface %s\n", ifobject->pkt_stream->nb_pkts, ifobject->ifname); @@ -1247,53 +1297,23 @@ static void *worker_testapp_validate_tx(void *arg) if (err) report_failure(test); - if (test->total_steps == test->current_step || err) - testapp_cleanup_xsk_res(ifobject); pthread_exit(NULL); } -static void xsk_populate_fill_ring(struct xsk_umem_info *umem, struct pkt_stream *pkt_stream) -{ - u32 idx = 0, i, buffers_to_fill; - int ret; - - if (umem->num_frames < XSK_RING_PROD__DEFAULT_NUM_DESCS) - buffers_to_fill = umem->num_frames; - else - buffers_to_fill = XSK_RING_PROD__DEFAULT_NUM_DESCS; - - ret = xsk_ring_prod__reserve(&umem->fq, buffers_to_fill, &idx); - if (ret != buffers_to_fill) - exit_with_error(ENOSPC); - for (i = 0; i < buffers_to_fill; i++) { - u64 addr; - - if (pkt_stream->use_addr_for_fill) { - struct pkt *pkt = pkt_stream_get_pkt(pkt_stream, i); - - if (!pkt) - break; - addr = pkt->addr; - } else { - addr = i * umem->frame_size; - } - - *xsk_ring_prod__fill_addr(&umem->fq, idx++) = addr; - } - xsk_ring_prod__submit(&umem->fq, buffers_to_fill); -} - static void *worker_testapp_validate_rx(void *arg) { struct test_spec *test = (struct test_spec *)arg; struct ifobject *ifobject = test->ifobj_rx; struct pollfd fds = { }; + int id = 0; int err; - if (test->current_step == 1) + if (test->current_step == 1) { thread_common_ops(test, ifobject); - - xsk_populate_fill_ring(ifobject->umem, ifobject->pkt_stream); + } else { + bpf_map_delete_elem(ifobject->xsk_map_fd, &id); + xsk_socket__update_xskmap(ifobject->xsk->xsk, ifobject->xsk_map_fd); + } fds.fd = xsk_socket__fd(ifobject->xsk->xsk); fds.events = POLLIN; @@ -1311,25 +1331,38 @@ static void *worker_testapp_validate_rx(void *arg) pthread_mutex_unlock(&pacing_mutex); } - if (test->total_steps == test->current_step || err) - testapp_cleanup_xsk_res(ifobject); pthread_exit(NULL); } +static void testapp_clean_xsk_umem(struct ifobject *ifobj) +{ + u64 umem_sz = ifobj->umem->num_frames * ifobj->umem->frame_size; + + if (ifobj->shared_umem) + umem_sz *= 2; + + xsk_umem__delete(ifobj->umem->umem); + munmap(ifobj->umem->buffer, umem_sz); +} + static int testapp_validate_traffic_single_thread(struct test_spec *test, struct ifobject *ifobj, enum test_type type) { + bool old_shared_umem = ifobj->shared_umem; pthread_t t0; if (pthread_barrier_init(&barr, NULL, 2)) exit_with_error(errno); test->current_step++; - if (type == TEST_TYPE_POLL_RXQ_TMOUT) + if (type == TEST_TYPE_POLL_RXQ_TMOUT) pkt_stream_reset(ifobj->pkt_stream); pkts_in_flight = 0; - /*Spawn thread */ + test->ifobj_rx->shared_umem = false; + test->ifobj_tx->shared_umem = false; + + /* Spawn thread */ pthread_create(&t0, NULL, ifobj->func_ptr, test); if (type != TEST_TYPE_POLL_TXQ_TMOUT) @@ -1340,6 +1373,14 @@ static int testapp_validate_traffic_single_thread(struct test_spec *test, struct pthread_join(t0, NULL); + if (test->total_steps == test->current_step || test->fail) { + xsk_socket__delete(ifobj->xsk->xsk); + testapp_clean_xsk_umem(ifobj); + } + + test->ifobj_rx->shared_umem = old_shared_umem; + test->ifobj_tx->shared_umem = old_shared_umem; + return !!test->fail; } @@ -1369,6 +1410,14 @@ static int testapp_validate_traffic(struct test_spec *test) pthread_join(t1, NULL); pthread_join(t0, NULL); + if (test->total_steps == test->current_step || test->fail) { + xsk_socket__delete(ifobj_tx->xsk->xsk); + xsk_socket__delete(ifobj_rx->xsk->xsk); + testapp_clean_xsk_umem(ifobj_rx); + if (!ifobj_tx->shared_umem) + testapp_clean_xsk_umem(ifobj_tx); + } + return !!test->fail; } @@ -1448,9 +1497,9 @@ static void testapp_headroom(struct test_spec *test) static void testapp_stats_rx_dropped(struct test_spec *test) { test_spec_set_name(test, "STAT_RX_DROPPED"); + pkt_stream_replace_half(test, MIN_PKT_SIZE * 4, 0); test->ifobj_rx->umem->frame_headroom = test->ifobj_rx->umem->frame_size - XDP_PACKET_HEADROOM - MIN_PKT_SIZE * 3; - pkt_stream_replace_half(test, MIN_PKT_SIZE * 4, 0); pkt_stream_receive_half(test); test->ifobj_rx->validation_func = validate_rx_dropped; testapp_validate_traffic(test); @@ -1573,6 +1622,11 @@ static void testapp_invalid_desc(struct test_spec *test) pkts[7].valid = false; } + if (test->ifobj_tx->shared_umem) { + pkts[4].addr += UMEM_SIZE; + pkts[5].addr += UMEM_SIZE; + } + pkt_stream_generate_custom(test, pkts, ARRAY_SIZE(pkts)); testapp_validate_traffic(test); pkt_stream_restore_default(test); @@ -1769,6 +1823,7 @@ int main(int argc, char **argv) int modes = TEST_MODE_SKB + 1; u32 i, j, failed_tests = 0; struct test_spec test; + bool shared_umem; /* Use libbpf 1.0 API mode */ libbpf_set_strict_mode(LIBBPF_STRICT_ALL); @@ -1783,6 +1838,10 @@ int main(int argc, char **argv) setlocale(LC_ALL, ""); parse_command_line(ifobj_tx, ifobj_rx, argc, argv); + shared_umem = !strcmp(ifobj_tx->ifname, ifobj_rx->ifname); + + ifobj_tx->shared_umem = shared_umem; + ifobj_rx->shared_umem = shared_umem; if (!validate_interface(ifobj_tx) || !validate_interface(ifobj_rx)) { usage(basename(argv[0])); @@ -1819,6 +1878,9 @@ int main(int argc, char **argv) pkt_stream_delete(tx_pkt_stream_default); pkt_stream_delete(rx_pkt_stream_default); + free(ifobj_rx->umem); + if (!ifobj_tx->shared_umem) + free(ifobj_tx->umem); ifobject_delete(ifobj_tx); ifobject_delete(ifobj_rx); diff --git a/tools/testing/selftests/bpf/xskxceiver.h b/tools/testing/selftests/bpf/xskxceiver.h index 04b298c72f67..11f017785986 100644 --- a/tools/testing/selftests/bpf/xskxceiver.h +++ b/tools/testing/selftests/bpf/xskxceiver.h @@ -153,6 +153,7 @@ struct ifobject { bool busy_poll; bool use_fill_ring; bool release_rx; + bool shared_umem; u8 dst_mac[ETH_ALEN]; u8 src_mac[ETH_ALEN]; };