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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 D9B8CC33CAF for ; Mon, 13 Jan 2020 11:37:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ABD042084D for ; Mon, 13 Jan 2020 11:37:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="FD6+qbMQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728669AbgAMLhf (ORCPT ); Mon, 13 Jan 2020 06:37:35 -0500 Received: from mail-m971.mail.163.com ([123.126.97.1]:41730 "EHLO mail-m971.mail.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725992AbgAMLhf (ORCPT ); Mon, 13 Jan 2020 06:37:35 -0500 X-Greylist: delayed 936 seconds by postgrey-1.27 at vger.kernel.org; Mon, 13 Jan 2020 06:37:33 EST DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=ebuOu i0AX5Ee0xOZV1fWjPDv5XEGQ0+O2EC0o8syPO0=; b=FD6+qbMQNkhULhMdfo+Oc x3DiomSPA4esnDPYm9q9RdcrV+9HTrcRowzaZozeuEmoMI8Pd5LC919i+LO7lqhH AI9jvDdcVrVlWlCButHxgwC82kqOyurF+IA8FUozLUeIF8qs34Kp05uox/l1NCkZ BkXV4w7I/z+T66ly/yX69s= Received: from xilei-TM1604.mioffice.cn (unknown [114.247.175.223]) by smtp1 (Coremail) with SMTP id GdxpCgBXROKhUhxeZ+sQBA--.1392S4; Mon, 13 Jan 2020 19:21:05 +0800 (CST) From: Niu Xilei To: davem@davemloft.net Cc: tglx@linutronix.de, fw@strlen.de, peterz@infradead.org, steffen.klassert@secunet.com, bigeasy@linutronix.de, jonathan.lemon@gmail.com, pabeni@redhat.com, anshuman.khandual@arm.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Niu Xilei Subject: [PATCH v2] pktgen: create packet use IPv6 source address between src6_min and src6_max. Date: Mon, 13 Jan 2020 19:21:02 +0800 Message-Id: <20200113112103.6766-1-niu_xilei@163.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID: GdxpCgBXROKhUhxeZ+sQBA--.1392S4 X-Coremail-Antispam: 1Uf129KBjvJXoWxur47Zr1DJF1xWw4xAF1UZFb_yoWrJw1kpa y3GF9xJryxZr43twsxJF9rtr1S9w4v9345XayfA3sY9FyDWryrA397Ga43tFyjqr9ak398 Jr42gFWqga1qqrUanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07jhb18UUUUU= X-Originating-IP: [114.247.175.223] X-CM-SenderInfo: pqlxs5plohxqqrwthudrp/1tbiTRepgFc7O8RRGwAAsq Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Pktgen can use only one IPv6 source address from output device, or src6 command setting. In pressure test we need create lots of session more than 65536.If IPSRC_RND flag is set, generate random source address between src6_min and src6_max. Signed-off-by: Niu Xilei Changes since v1: - only create IPv6 source address over least significant 64 bit range --- net/core/pktgen.c | 90 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+) diff --git a/net/core/pktgen.c b/net/core/pktgen.c index 294bfcf0ce0e..33435ae0ba68 100644 --- a/net/core/pktgen.c +++ b/net/core/pktgen.c @@ -1355,6 +1355,49 @@ static ssize_t pktgen_if_write(struct file *file, sprintf(pg_result, "OK: dst6_max=%s", buf); return count; } + if (!strcmp(name, "src6_min")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) + return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + in6_pton(buf, -1, pkt_dev->min_in6_saddr.s6_addr, -1, NULL); + snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_saddr); + + pkt_dev->cur_in6_saddr = pkt_dev->min_in6_saddr; + if (debug) + pr_debug("src6_min set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: src6_min=%s", buf); + return count; + } + if (!strcmp(name, "src6_max")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) + return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + in6_pton(buf, -1, pkt_dev->max_in6_saddr.s6_addr, -1, NULL); + snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_saddr); + + if (debug) + pr_debug("dst6_max set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: dst6_max=%s", buf); + return count; + } if (!strcmp(name, "src6")) { len = strn_len(&user_buffer[i], sizeof(buf) - 1); if (len < 0) @@ -2286,6 +2329,51 @@ static void set_cur_queue_map(struct pktgen_dev *pkt_dev) pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; } +/* generate ipv6 source addr */ +static inline void set_src_in6_addr(struct pktgen_dev *pkt_dev) +{ + __be64 min6_h, min6_l, max6_h, max6_l, addr_l, *t; + u64 min6, max6, rand, i; + struct in6_addr addr6; + + memcpy(&min6_h, pkt_dev->min_in6_saddr.s6_addr, 8); + memcpy(&min6_l, pkt_dev->min_in6_saddr.s6_addr + 8, 8); + memcpy(&max6_h, pkt_dev->max_in6_saddr.s6_addr, 8); + memcpy(&max6_l, pkt_dev->max_in6_saddr.s6_addr + 8, 8); + + /* only generate source address in least significant 64 bits range + * most significant 64 bits must be equal + */ + if (max6_h != min6_h) + return; + + addr6 = pkt_dev->min_in6_saddr; + t = (__be64 *)addr6.s6_addr + 1; + min6 = be64_to_cpu(min6_l); + max6 = be64_to_cpu(max6_l); + + if (min6 < max6) { + if (pkt_dev->flags & F_IPSRC_RND) { + do { + prandom_bytes(&rand, sizeof(rand)); + rand = rand % (max6 - min6) + min6; + addr_l = cpu_to_be64(rand); + memcpy(t, &addr_l, 8); + } while (ipv6_addr_loopback(&addr6) || + ipv6_addr_v4mapped(&addr6) || + ipv6_addr_is_multicast(&addr6)); + } else { + addr6 = pkt_dev->cur_in6_saddr; + i = be64_to_cpu(*t); + if (++i > max6) + i = min6; + addr_l = cpu_to_be64(i); + memcpy(t, &addr_l, 8); + } + } + pkt_dev->cur_in6_saddr = addr6; +} + /* Increment/randomize headers according to flags and current values * for IP src/dest, UDP src/dst port, MAC-Addr src/dst */ @@ -2454,6 +2542,8 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev) } } else { /* IPV6 * */ + set_src_in6_addr(pkt_dev); + if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { int i; -- 2.20.1