From patchwork Wed May 20 19:55:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11561211 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 92AD51391 for ; Wed, 20 May 2020 19:57:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 790CD207E8 for ; Wed, 20 May 2020 19:57:36 +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="K2oWWvnR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728444AbgETT5P (ORCPT ); Wed, 20 May 2020 15:57:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51298 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727113AbgETT5M (ORCPT ); Wed, 20 May 2020 15:57:12 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0DBB3C061A0F; Wed, 20 May 2020 12:57:12 -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=fQB1MoUY1DoFW/LCHHPWdcIToW6X3yYHVE9OqGHCLRE=; b=K2oWWvnRH0bAH7t3M/NnCWXcm6 ijivdECtWhaXVJ9Ypm89bAnX4whjcAd817MKj9/1duM88xuNoIJYmMK5lAa983D4SQdlcoKgkDaZt A8bUfDx6BggU+nIWrVPichd+qhQxBHbSFUSNG6MCTMqhIFJTalznNkB8DGfUEzNlEYZfzGVfVfTt4 sHW2HR+w0ZhzZArJKVNNv7/R34a9K+uwHatVrlcvBH09MPGxyNG9BbR9WwV0maBao/a9dTcwW5eTe BJgMzLjSgJ94TZm1sr4vNSSwrl62C0W8o7xQl3iB80GeJaa6yc+kAwOFqITPFjdx6GkORG0M0bhw5 La8oZZPg==; Received: from [2001:4bb8:188:1506:c70:4a89:bc61:2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jbUph-0003bo-G7; Wed, 20 May 2020 19:56:53 +0000 From: Christoph Hellwig To: "David S. Miller" , Jakub Kicinski Cc: Eric Dumazet , Alexey Kuznetsov , Hideaki YOSHIFUJI , Vlad Yasevich , Neil Horman , Marcelo Ricardo Leitner , 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, linux-sctp@vger.kernel.org, ceph-devel@vger.kernel.org, rds-devel@oss.oracle.com, linux-nfs@vger.kernel.org Subject: [PATCH 32/33] net: add a new bind_add method Date: Wed, 20 May 2020 21:55:08 +0200 Message-Id: <20200520195509.2215098-33-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200520195509.2215098-1-hch@lst.de> References: <20200520195509.2215098-1-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 The SCTP protocol allows to bind multiple address to a socket. That feature is currently only exposed as a socket option. Add a bind_add method struct proto that allows to bind additional addresses, and switch the dlm code to use the method instead of going through the socket option from kernel space. Signed-off-by: Christoph Hellwig --- fs/dlm/lowcomms.c | 9 +++------ include/net/sock.h | 6 +++++- net/core/sock.c | 8 ++++++++ net/sctp/socket.c | 23 +++++++++++++++++++++++ 4 files changed, 39 insertions(+), 7 deletions(-) diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c index 9f1c3cdc9d653..3543a8fec9075 100644 --- a/fs/dlm/lowcomms.c +++ b/fs/dlm/lowcomms.c @@ -882,6 +882,7 @@ static void writequeue_entry_complete(struct writequeue_entry *e, int completed) static int sctp_bind_addrs(struct connection *con, uint16_t port) { struct sockaddr_storage localaddr; + struct sockaddr *addr = (struct sockaddr *)&localaddr; int i, addr_len, result = 0; for (i = 0; i < dlm_local_count; i++) { @@ -889,13 +890,9 @@ static int sctp_bind_addrs(struct connection *con, uint16_t port) make_sockaddr(&localaddr, port, &addr_len); if (!i) - result = kernel_bind(con->sock, - (struct sockaddr *)&localaddr, - addr_len); + result = kernel_bind(con->sock, addr, addr_len); else - result = kernel_setsockopt(con->sock, SOL_SCTP, - SCTP_SOCKOPT_BINDX_ADD, - (char *)&localaddr, addr_len); + result = sock_bind_add(con->sock->sk, addr, addr_len); if (result < 0) { log_print("Can't bind to %d addr number %d, %d.\n", diff --git a/include/net/sock.h b/include/net/sock.h index d994daa418ec2..6e9f713a78607 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1156,7 +1156,9 @@ struct proto { int (*sendpage)(struct sock *sk, struct page *page, int offset, size_t size, int flags); int (*bind)(struct sock *sk, - struct sockaddr *uaddr, int addr_len); + struct sockaddr *addr, int addr_len); + int (*bind_add)(struct sock *sk, + struct sockaddr *addr, int addr_len); int (*backlog_rcv) (struct sock *sk, struct sk_buff *skb); @@ -2698,4 +2700,6 @@ void sock_set_reuseaddr(struct sock *sk); void sock_set_reuseport(struct sock *sk); void sock_set_sndtimeo(struct sock *sk, s64 secs); +int sock_bind_add(struct sock *sk, struct sockaddr *addr, int addr_len); + #endif /* _SOCK_H */ diff --git a/net/core/sock.c b/net/core/sock.c index 2ca3425b519c0..61ec573221a60 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -3712,3 +3712,11 @@ bool sk_busy_loop_end(void *p, unsigned long start_time) } EXPORT_SYMBOL(sk_busy_loop_end); #endif /* CONFIG_NET_RX_BUSY_POLL */ + +int sock_bind_add(struct sock *sk, struct sockaddr *addr, int addr_len) +{ + if (!sk->sk_prot->bind_add) + return -EOPNOTSUPP; + return sk->sk_prot->bind_add(sk, addr, addr_len); +} +EXPORT_SYMBOL(sock_bind_add); diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 827a9903ee288..8a0b9258f65c0 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -1057,6 +1057,27 @@ static int sctp_setsockopt_bindx(struct sock *sk, return err; } +static int sctp_bind_add(struct sock *sk, struct sockaddr *addr, + int addrlen) +{ + struct sctp_af *af = sctp_get_af_specific(addr->sa_family); + int err; + + if (!af || af->sockaddr_len > addrlen) + return -EINVAL; + err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_BINDX_ADD, addr, + addrlen); + if (err) + return err; + + lock_sock(sk); + err = sctp_do_bind(sk, (union sctp_addr *)addr, af->sockaddr_len); + if (!err) + err = sctp_send_asconf_add_ip(sk, addr, 1); + release_sock(sk); + return err; +} + static int sctp_connect_new_asoc(struct sctp_endpoint *ep, const union sctp_addr *daddr, const struct sctp_initmsg *init, @@ -9625,6 +9646,7 @@ struct proto sctp_prot = { .sendmsg = sctp_sendmsg, .recvmsg = sctp_recvmsg, .bind = sctp_bind, + .bind_add = sctp_bind_add, .backlog_rcv = sctp_backlog_rcv, .hash = sctp_hash, .unhash = sctp_unhash, @@ -9667,6 +9689,7 @@ struct proto sctpv6_prot = { .sendmsg = sctp_sendmsg, .recvmsg = sctp_recvmsg, .bind = sctp_bind, + .bind_add = sctp_bind_add, .backlog_rcv = sctp_backlog_rcv, .hash = sctp_hash, .unhash = sctp_unhash,