From patchwork Thu May 28 05:12:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 218363 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_INVALID,DKIM_SIGNED, 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 EFC77C433E3 for ; Thu, 28 May 2020 05:15:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CA2782084C for ; Thu, 28 May 2020 05:15:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="NXCU2lMQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728218AbgE1FO0 (ORCPT ); Thu, 28 May 2020 01:14:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40574 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728193AbgE1FOU (ORCPT ); Thu, 28 May 2020 01:14:20 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CA2DCC05BD1E; Wed, 27 May 2020 22:14:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=2/3V+8xW2Dg2wOlgqylSs8i5g7RJAznZxdE6S/5cuLE=; b=NXCU2lMQlEDGK4ONn3qpkzAt6r 4qvuCFPEvDkGTYLbEf6UQd9sNgvQxP4b2fLd5F248U13z/ofck7PQ7tB9ptdEE2LTpx1Xns2H8bWI /z4zhy82bvvOLKWtGxpDgVJ5QpqLnWUk64HdblDBm0AtTdsoImcXzZkDiXpB2KdDKgANnVbdxLl1b t094b6ujRfgXO5DtXa/bOXDy6sFKmlnriVmvBkzV3a204AXii3N/fCF1q7kCVH635/F49klFj6N0m A9YfJm2AmUgwLBNGko+af3oIE9x7KAkJNwEUNt+d80uinZicSAzAgCz7eLN06vCgKdPbqqQqIazAS qBY58pJA==; Received: from p4fdb1ad2.dip0.t-ipconnect.de ([79.219.26.210] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jeArb-0002VB-At; Thu, 28 May 2020 05:13:55 +0000 From: Christoph Hellwig To: "David S. Miller" , Jakub Kicinski Cc: Eric Dumazet , Alexey Kuznetsov , Hideaki YOSHIFUJI , Jon Maloy , Ying Xue , drbd-dev@lists.linbit.com, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, linux-nvme@lists.infradead.org, target-devel@vger.kernel.org, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, cluster-devel@redhat.com, ocfs2-devel@oss.oracle.com, netdev@vger.kernel.org, ceph-devel@vger.kernel.org, rds-devel@oss.oracle.com, linux-nfs@vger.kernel.org, tipc-discussion@lists.sourceforge.net Subject: [PATCH 23/28] ipv6: add ip6_sock_set_v6only Date: Thu, 28 May 2020 07:12:31 +0200 Message-Id: <20200528051236.620353-24-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200528051236.620353-1-hch@lst.de> References: <20200528051236.620353-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add a helper to directly set the IPV6_V6ONLY sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig --- include/net/ipv6.h | 11 +++++++++++ net/ipv6/ip6_udp_tunnel.c | 5 +---- net/sunrpc/svcsock.c | 6 +----- 3 files changed, 13 insertions(+), 9 deletions(-) diff --git a/include/net/ipv6.h b/include/net/ipv6.h index 39a00d3ef5e22..9b91188c9a74c 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -1177,4 +1177,15 @@ int ipv6_sock_mc_join_ssm(struct sock *sk, int ifindex, const struct in6_addr *addr, unsigned int mode); int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr); + +static inline int ip6_sock_set_v6only(struct sock *sk) +{ + if (inet_sk(sk)->inet_num) + return -EINVAL; + lock_sock(sk); + sk->sk_ipv6only = true; + release_sock(sk); + return 0; +} + #endif /* _NET_IPV6_H */ diff --git a/net/ipv6/ip6_udp_tunnel.c b/net/ipv6/ip6_udp_tunnel.c index 6523609516d25..2e0ad1bc84a83 100644 --- a/net/ipv6/ip6_udp_tunnel.c +++ b/net/ipv6/ip6_udp_tunnel.c @@ -25,10 +25,7 @@ int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, goto error; if (cfg->ipv6_v6only) { - int val = 1; - - err = kernel_setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, - (char *) &val, sizeof(val)); + err = ip6_sock_set_v6only(sock->sk); if (err < 0) goto error; } diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 7a805d165689c..a391892977cd2 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1328,7 +1328,6 @@ static struct svc_xprt *svc_create_socket(struct svc_serv *serv, struct sockaddr *newsin = (struct sockaddr *)&addr; int newlen; int family; - int val; RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); dprintk("svc: svc_create_socket(%s, %d, %s)\n", @@ -1364,11 +1363,8 @@ static struct svc_xprt *svc_create_socket(struct svc_serv *serv, * getting requests from IPv4 remotes. Those should * be shunted to a PF_INET listener via rpcbind. */ - val = 1; if (family == PF_INET6) - kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY, - (char *)&val, sizeof(val)); - + ip6_sock_set_v6only(sock->sk); if (type == SOCK_STREAM) sock->sk->sk_reuse = SK_CAN_REUSE; /* allow address reuse */ error = kernel_bind(sock, sin, len);