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=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 455DEC48BD6 for ; Thu, 27 Jun 2019 15:04:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 223E72086D for ; Thu, 27 Jun 2019 15:04:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726734AbfF0PEz (ORCPT ); Thu, 27 Jun 2019 11:04:55 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:42840 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726443AbfF0PEz (ORCPT ); Thu, 27 Jun 2019 11:04:55 -0400 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x5RF4WZp114804 for ; Thu, 27 Jun 2019 11:04:54 -0400 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0b-001b2d01.pphosted.com with ESMTP id 2tcy16c43e-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 27 Jun 2019 11:04:47 -0400 Received: from localhost by e06smtp04.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 27 Jun 2019 16:01:40 +0100 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x5RF1dBo60621040 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 27 Jun 2019 15:01:39 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E5CB1A406A; Thu, 27 Jun 2019 15:01:38 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AD439A4068; Thu, 27 Jun 2019 15:01:38 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 27 Jun 2019 15:01:38 +0000 (GMT) From: Julian Wiedmann To: David Miller Cc: , , Heiko Carstens , Stefan Raspl , Ursula Braun , Julian Wiedmann Subject: [PATCH net-next 11/12] s390/qeth: extract helper for route validation Date: Thu, 27 Jun 2019 17:01:32 +0200 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190627150133.58746-1-jwi@linux.ibm.com> References: <20190627150133.58746-1-jwi@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19062715-0016-0000-0000-0000028D0D0E X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19062715-0017-0000-0000-000032EA8BAA Message-Id: <20190627150133.58746-12-jwi@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-06-27_09:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906270176 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org As follow-up to commit 0cd6783d3c7d ("s390/qeth: check dst entry before use"), consolidate the dst_check() logic into a single helper and add a wrapper around the cast type selection. Signed-off-by: Julian Wiedmann --- drivers/s390/net/qeth_core.h | 13 +++++++++ drivers/s390/net/qeth_l3_main.c | 49 ++++++++++++++------------------- 2 files changed, 34 insertions(+), 28 deletions(-) diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index c81d5ec26803..d354b39cdf4b 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -25,6 +25,8 @@ #include #include +#include +#include #include #include #include @@ -877,6 +879,17 @@ static inline int qeth_get_ether_cast_type(struct sk_buff *skb) return RTN_UNICAST; } +static inline struct dst_entry *qeth_dst_check_rcu(struct sk_buff *skb, int ipv) +{ + struct dst_entry *dst = skb_dst(skb); + struct rt6_info *rt; + + rt = (struct rt6_info *) dst; + if (dst) + dst = dst_check(dst, (ipv == 6) ? rt6_get_cookie(rt) : 0); + return dst; +} + static inline void qeth_rx_csum(struct qeth_card *card, struct sk_buff *skb, u8 flags) { diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 15351922b209..5bf5129ddcd4 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -32,7 +32,6 @@ #include #include #include -#include #include #include @@ -1878,26 +1877,17 @@ static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) return rc; } -static int qeth_l3_get_cast_type(struct sk_buff *skb) +static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst, + int ipv) { - int ipv = qeth_get_ip_version(skb); struct neighbour *n = NULL; - struct dst_entry *dst; - rcu_read_lock(); - dst = skb_dst(skb); - if (dst) { - struct rt6_info *rt = (struct rt6_info *) dst; - - dst = dst_check(dst, (ipv == 6) ? rt6_get_cookie(rt) : 0); - if (dst) - n = dst_neigh_lookup_skb(dst, skb); - } + if (dst) + n = dst_neigh_lookup_skb(dst, skb); if (n) { int cast_type = n->type; - rcu_read_unlock(); neigh_release(n); if ((cast_type == RTN_BROADCAST) || (cast_type == RTN_MULTICAST) || @@ -1905,7 +1895,6 @@ static int qeth_l3_get_cast_type(struct sk_buff *skb) return cast_type; return RTN_UNICAST; } - rcu_read_unlock(); /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */ switch (ipv) { @@ -1923,6 +1912,20 @@ static int qeth_l3_get_cast_type(struct sk_buff *skb) } } +static int qeth_l3_get_cast_type(struct sk_buff *skb) +{ + int ipv = qeth_get_ip_version(skb); + struct dst_entry *dst; + int cast_type; + + rcu_read_lock(); + dst = qeth_dst_check_rcu(skb, ipv); + cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv); + rcu_read_unlock(); + + return cast_type; +} + static u8 qeth_l3_cast_type_to_flag(int cast_type) { if (cast_type == RTN_MULTICAST) @@ -1987,27 +1990,17 @@ static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue, } rcu_read_lock(); - dst = skb_dst(skb); + dst = qeth_dst_check_rcu(skb, ipv); if (ipv == 4) { - struct rtable *rt; - - if (dst) - dst = dst_check(dst, 0); - rt = (struct rtable *) dst; + struct rtable *rt = (struct rtable *) dst; *((__be32 *) &hdr->hdr.l3.next_hop.ipv4.addr) = (rt) ? rt_nexthop(rt, ip_hdr(skb)->daddr) : ip_hdr(skb)->daddr; } else { /* IPv6 */ - struct rt6_info *rt; - - if (dst) { - rt = (struct rt6_info *) dst; - dst = dst_check(dst, rt6_get_cookie(rt)); - } - rt = (struct rt6_info *) dst; + struct rt6_info *rt = (struct rt6_info *) dst; if (rt && !ipv6_addr_any(&rt->rt6i_gateway)) l3_hdr->next_hop.ipv6_addr = rt->rt6i_gateway; -- 2.17.1