From patchwork Thu May 28 05:12:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11574423 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 021D792A for ; Thu, 28 May 2020 05:14:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DE1762089D for ; Thu, 28 May 2020 05:14:52 +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="dJIPd37w" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728330AbgE1FOo (ORCPT ); Thu, 28 May 2020 01:14:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728305AbgE1FOe (ORCPT ); Thu, 28 May 2020 01:14:34 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E7A77C05BD1E; Wed, 27 May 2020 22:14:33 -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=9Su47y3nSXg09bPxBUYtCBYi/Gda8HLIIrC/h2skIjw=; b=dJIPd37wjqdyWpSrtlpATYIjvb puG2QV8dzXrMHoM9QZ0dBoBkxRYht69Wxbc0OUDn8NY1loRax0OL3fnxh8AzDl1ePZf9V/MqGrJ6g I7V7nqX5BloP/ylc8Bv/mOC6lhjKu72hxp8vTSlRCxztMf7KmDICEj6jrGZScFeIWC9x2mAMKW0IO SPQ4MZNFVjswGMnWpVyQvsX+vM5K963t0cxpfXysnWJPvtGwpHqlbHCcfyYmDEaqrccB2RgC2S1r1 PNlfnjReOvKHRyxD2J8GLpmEX74Tqm8AjhviLlA9nPqDLJ0TTvR7mxSzlFcbLVPkMqoSNd0uAOpc/ 48V9YU9w==; 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 1jeArn-0002d8-7k; Thu, 28 May 2020 05:14:07 +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, David Howells Subject: [PATCH 27/28] rxrpc: add rxrpc_sock_set_min_security_level Date: Thu, 28 May 2020 07:12:35 +0200 Message-Id: <20200528051236.620353-28-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: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Add a helper to directly set the RXRPC_MIN_SECURITY_LEVEL sockopt from kernel space without going through a fake uaccess. Thanks to David Howells for the documentation updates. Signed-off-by: Christoph Hellwig Acked-by: David Howells --- Documentation/networking/rxrpc.rst | 13 +++++++++++-- fs/afs/rxrpc.c | 6 ++---- include/net/af_rxrpc.h | 2 ++ net/rxrpc/af_rxrpc.c | 13 +++++++++++++ 4 files changed, 28 insertions(+), 6 deletions(-) diff --git a/Documentation/networking/rxrpc.rst b/Documentation/networking/rxrpc.rst index 5ad35113d0f46..68552b92dc442 100644 --- a/Documentation/networking/rxrpc.rst +++ b/Documentation/networking/rxrpc.rst @@ -477,7 +477,7 @@ AF_RXRPC sockets support a few socket options at the SOL_RXRPC level: Encrypted checksum plus packet padded and first eight bytes of packet encrypted - which includes the actual packet length. - (c) RXRPC_SECURITY_ENCRYPTED + (c) RXRPC_SECURITY_ENCRYPT Encrypted checksum plus entire packet padded and encrypted, including actual packet length. @@ -578,7 +578,7 @@ A client would issue an operation by: This issues a request_key() to get the key representing the security context. The minimum security level can be set:: - unsigned int sec = RXRPC_SECURITY_ENCRYPTED; + unsigned int sec = RXRPC_SECURITY_ENCRYPT; setsockopt(client, SOL_RXRPC, RXRPC_MIN_SECURITY_LEVEL, &sec, sizeof(sec)); @@ -1090,6 +1090,15 @@ The kernel interface functions are as follows: jiffies). In the event of the timeout occurring, the call will be aborted and -ETIME or -ETIMEDOUT will be returned. + (#) Apply the RXRPC_MIN_SECURITY_LEVEL sockopt to a socket from within in the + kernel:: + + int rxrpc_sock_set_min_security_level(struct sock *sk, + unsigned int val); + + This specifies the minimum security level required for calls on this + socket. + Configurable Parameters ======================= diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c index 1ecc67da6c1a4..e313dae01674f 100644 --- a/fs/afs/rxrpc.c +++ b/fs/afs/rxrpc.c @@ -37,7 +37,6 @@ int afs_open_socket(struct afs_net *net) { struct sockaddr_rxrpc srx; struct socket *socket; - unsigned int min_level; int ret; _enter(""); @@ -57,9 +56,8 @@ int afs_open_socket(struct afs_net *net) srx.transport.sin6.sin6_family = AF_INET6; srx.transport.sin6.sin6_port = htons(AFS_CM_PORT); - min_level = RXRPC_SECURITY_ENCRYPT; - ret = kernel_setsockopt(socket, SOL_RXRPC, RXRPC_MIN_SECURITY_LEVEL, - (void *)&min_level, sizeof(min_level)); + ret = rxrpc_sock_set_min_security_level(socket->sk, + RXRPC_SECURITY_ENCRYPT); if (ret < 0) goto error_2; diff --git a/include/net/af_rxrpc.h b/include/net/af_rxrpc.h index ab988940bf045..91eacbdcf33d2 100644 --- a/include/net/af_rxrpc.h +++ b/include/net/af_rxrpc.h @@ -72,4 +72,6 @@ bool rxrpc_kernel_call_is_complete(struct rxrpc_call *); void rxrpc_kernel_set_max_life(struct socket *, struct rxrpc_call *, unsigned long); +int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val); + #endif /* _NET_RXRPC_H */ diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c index 15ee92d795815..394189b81849f 100644 --- a/net/rxrpc/af_rxrpc.c +++ b/net/rxrpc/af_rxrpc.c @@ -571,6 +571,19 @@ static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len) return ret; } +int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val) +{ + if (sk->sk_state != RXRPC_UNBOUND) + return -EISCONN; + if (val > RXRPC_SECURITY_MAX) + return -EINVAL; + lock_sock(sk); + rxrpc_sk(sk)->min_sec_level = val; + release_sock(sk); + return 0; +} +EXPORT_SYMBOL(rxrpc_sock_set_min_security_level); + /* * set RxRPC socket options */