From patchwork Mon Mar 22 20:58:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maciej Fijalkowski X-Patchwork-Id: 406477 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, 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 1B96FC433E4 for ; Mon, 22 Mar 2021 21:10:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EA433619A7 for ; Mon, 22 Mar 2021 21:10:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231815AbhCVVKO (ORCPT ); Mon, 22 Mar 2021 17:10:14 -0400 Received: from mga01.intel.com ([192.55.52.88]:4966 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231148AbhCVVJQ (ORCPT ); Mon, 22 Mar 2021 17:09:16 -0400 IronPort-SDR: fHlgNqIf96+U/Uam7/nMS51Jc8rVOaVKlcu4LlK/UGIVYPf74mlQfkQjmzmvGSbSA5R3tf+vda 4B9E2NEoL+aA== X-IronPort-AV: E=McAfee;i="6000,8403,9931"; a="210423734" X-IronPort-AV: E=Sophos;i="5.81,269,1610438400"; d="scan'208";a="210423734" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Mar 2021 14:09:16 -0700 IronPort-SDR: RrCioYKYDavtEhFbquPXzgF2LXLJu+KQeG8ByWOJcNxI3sxUehOM2gj+5jT4WWbzNrKj5lY9R1 1bkwDWBBU1rw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,269,1610438400"; d="scan'208";a="513448828" Received: from ranger.igk.intel.com ([10.102.21.164]) by fmsmga001.fm.intel.com with ESMTP; 22 Mar 2021 14:09:14 -0700 From: Maciej Fijalkowski To: bpf@vger.kernel.org, netdev@vger.kernel.org, daniel@iogearbox.net, ast@kernel.org Cc: bjorn.topel@intel.com, magnus.karlsson@intel.com, ciara.loftus@intel.com, john.fastabend@gmail.com, toke@redhat.com, Maciej Fijalkowski Subject: [PATCH v3 bpf-next 08/17] selftests: xsk: remove thread for netns switch Date: Mon, 22 Mar 2021 21:58:07 +0100 Message-Id: <20210322205816.65159-9-maciej.fijalkowski@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210322205816.65159-1-maciej.fijalkowski@intel.com> References: <20210322205816.65159-1-maciej.fijalkowski@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Currently, there is a dedicated thread for following remote ns operations: - grabbing the ifindex of the interface moved to remote netns - removing xdp prog from that interface With bpf_link usage in place, this can be simply omitted, so remove mentioned thread, as BPF resources will be managed by bpf_link itself, so there's no further need for creating the thread that will switch to remote netns and do the cleanup. Keep most of the logic for switching the ns, though, but make switch_namespace() return the fd so that it will be possible to close it at the process termination time. Get rid of logic around making sure that it's possible to switch ns in validate_interfaces(). Signed-off-by: Maciej Fijalkowski --- tools/testing/selftests/bpf/xdpxceiver.c | 123 +++-------------------- tools/testing/selftests/bpf/xdpxceiver.h | 10 +- 2 files changed, 14 insertions(+), 119 deletions(-) diff --git a/tools/testing/selftests/bpf/xdpxceiver.c b/tools/testing/selftests/bpf/xdpxceiver.c index cf30c7943ac0..2e5f536563e4 100644 --- a/tools/testing/selftests/bpf/xdpxceiver.c +++ b/tools/testing/selftests/bpf/xdpxceiver.c @@ -355,12 +355,15 @@ static void usage(const char *prog) ksft_print_msg(str, prog); } -static bool switch_namespace(int idx) +static int switch_namespace(const char *nsname) { char fqns[26] = "/var/run/netns/"; int nsfd; - strncat(fqns, ifdict[idx]->nsname, sizeof(fqns) - strlen(fqns) - 1); + if (!nsname || strlen(nsname) == 0) + return -1; + + strncat(fqns, nsname, sizeof(fqns) - strlen(fqns) - 1); nsfd = open(fqns, O_RDONLY); if (nsfd == -1) @@ -369,26 +372,9 @@ static bool switch_namespace(int idx) if (setns(nsfd, 0) == -1) exit_with_error(errno); - return true; -} - -static void *nsswitchthread(void *args) -{ - struct targs *targs = args; + print_verbose("NS switched: %s\n", nsname); - targs->retptr = false; - - if (switch_namespace(targs->idx)) { - ifdict[targs->idx]->ifindex = if_nametoindex(ifdict[targs->idx]->ifname); - if (!ifdict[targs->idx]->ifindex) { - ksft_test_result_fail("ERROR: [%s] interface \"%s\" does not exist\n", - __func__, ifdict[targs->idx]->ifname); - } else { - print_verbose("Interface found: %s\n", ifdict[targs->idx]->ifname); - targs->retptr = true; - } - } - pthread_exit(NULL); + return nsfd; } static int validate_interfaces(void) @@ -400,33 +386,6 @@ static int validate_interfaces(void) ret = false; ksft_test_result_fail("ERROR: interfaces: -i , -i ,."); } - if (strcmp(ifdict[i]->nsname, "")) { - struct targs *targs; - - targs = malloc(sizeof(*targs)); - if (!targs) - exit_with_error(errno); - - targs->idx = i; - if (pthread_create(&ns_thread, NULL, nsswitchthread, targs)) - exit_with_error(errno); - - pthread_join(ns_thread, NULL); - - if (targs->retptr) - print_verbose("NS switched: %s\n", ifdict[i]->nsname); - - free(targs); - } else { - ifdict[i]->ifindex = if_nametoindex(ifdict[i]->ifname); - if (!ifdict[i]->ifindex) { - ksft_test_result_fail - ("ERROR: interface \"%s\" does not exist\n", ifdict[i]->ifname); - ret = false; - } else { - print_verbose("Interface found: %s\n", ifdict[i]->ifname); - } - } } return ret; } @@ -843,8 +802,7 @@ static void *worker_testapp_validate(void *arg) if (bufs == MAP_FAILED) exit_with_error(errno); - if (strcmp(ifobject->nsname, "")) - switch_namespace(ifobject->ifdict_index); + ifobject->ns_fd = switch_namespace(ifobject->nsname); } if (ifobject->fv.vector == tx) { @@ -1059,60 +1017,6 @@ static void init_iface(struct ifobject *ifobj, const char *dst_mac, ifobj->src_port = src_port; } -static void *nsdisablemodethread(void *args) -{ - struct targs *targs = args; - - targs->retptr = false; - - if (switch_namespace(targs->idx)) { - targs->retptr = bpf_set_link_xdp_fd(ifdict[targs->idx]->ifindex, -1, targs->flags); - } else { - targs->retptr = errno; - print_verbose("Failed to switch namespace to %s\n", ifdict[targs->idx]->nsname); - } - - pthread_exit(NULL); -} - -static void disable_xdp_mode(int mode) -{ - int err = 0; - __u32 flags = XDP_FLAGS_UPDATE_IF_NOEXIST | mode; - char *mode_str = mode & XDP_FLAGS_SKB_MODE ? "skb" : "drv"; - - for (int i = 0; i < MAX_INTERFACES; i++) { - if (strcmp(ifdict[i]->nsname, "")) { - struct targs *targs; - - targs = malloc(sizeof(*targs)); - memset(targs, 0, sizeof(*targs)); - if (!targs) - exit_with_error(errno); - - targs->idx = i; - targs->flags = flags; - if (pthread_create(&ns_thread, NULL, nsdisablemodethread, targs)) - exit_with_error(errno); - - pthread_join(ns_thread, NULL); - err = targs->retptr; - free(targs); - } else { - err = bpf_set_link_xdp_fd(ifdict[i]->ifindex, -1, flags); - } - - if (err) { - print_verbose("Failed to disable %s mode on interface %s\n", - mode_str, ifdict[i]->ifname); - exit_with_error(err); - } - - print_verbose("Disabled %s mode for interface: %s\n", mode_str, ifdict[i]->ifname); - configured_mode = mode & XDP_FLAGS_SKB_MODE ? TEST_MODE_DRV : TEST_MODE_SKB; - } -} - static void run_pkt_test(int mode, int type) { test_type = type; @@ -1132,13 +1036,9 @@ static void run_pkt_test(int mode, int type) switch (mode) { case (TEST_MODE_SKB): - if (configured_mode == TEST_MODE_DRV) - disable_xdp_mode(XDP_FLAGS_DRV_MODE); xdp_flags |= XDP_FLAGS_SKB_MODE; break; case (TEST_MODE_DRV): - if (configured_mode == TEST_MODE_SKB) - disable_xdp_mode(XDP_FLAGS_SKB_MODE); xdp_flags |= XDP_FLAGS_DRV_MODE; break; default: @@ -1185,8 +1085,6 @@ int main(int argc, char **argv) ifdict[1]->fv.vector = rx; init_iface(ifdict[1], MAC2, MAC1, IP2, IP1, UDP_PORT2, UDP_PORT1); - disable_xdp_mode(XDP_FLAGS_DRV_MODE); - ksft_set_plan(TEST_MODE_MAX * TEST_TYPE_MAX); for (i = 0; i < TEST_MODE_MAX; i++) { @@ -1194,8 +1092,11 @@ int main(int argc, char **argv) run_pkt_test(i, j); } - for (int i = 0; i < MAX_INTERFACES; i++) + for (int i = 0; i < MAX_INTERFACES; i++) { + if (ifdict[i]->ns_fd != -1) + close(ifdict[i]->ns_fd); free(ifdict[i]); + } ksft_exit_pass(); diff --git a/tools/testing/selftests/bpf/xdpxceiver.h b/tools/testing/selftests/bpf/xdpxceiver.h index 8f9308099318..493f7498d40e 100644 --- a/tools/testing/selftests/bpf/xdpxceiver.h +++ b/tools/testing/selftests/bpf/xdpxceiver.h @@ -126,7 +126,7 @@ struct generic_data { }; struct ifobject { - int ifindex; + int ns_fd; int ifdict_index; char ifname[MAX_INTERFACE_NAME_CHARS]; char nsname[MAX_INTERFACES_NAMESPACE_CHARS]; @@ -150,15 +150,9 @@ pthread_mutex_t sync_mutex; pthread_mutex_t sync_mutex_tx; pthread_cond_t signal_rx_condition; pthread_cond_t signal_tx_condition; -pthread_t t0, t1, ns_thread; +pthread_t t0, t1; pthread_attr_t attr; -struct targs { - u8 retptr; - int idx; - u32 flags; -}; - TAILQ_HEAD(head_s, pkt) head = TAILQ_HEAD_INITIALIZER(head); struct head_s *head_p; struct pkt {