linux-kernel - [PATCH 27/33] sctp: export sctp_setsockopt

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Date:   Wed, 13 May 2020 08:26:42 +0200
From:   Christoph Hellwig <hch@....de>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Vlad Yasevich <vyasevich@...il.com>,
        Neil Horman <nhorman@...driver.com>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        Jon Maloy <jmaloy@...hat.com>,
        Ying Xue <ying.xue@...driver.com>, drbd-dev@...ts.linbit.com,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-nvme@...ts.infradead.org,
        target-devel@...r.kernel.org, linux-afs@...ts.infradead.org,
        linux-cifs@...r.kernel.org, cluster-devel@...hat.com,
        ocfs2-devel@....oracle.com, netdev@...r.kernel.org,
        linux-sctp@...r.kernel.org, ceph-devel@...r.kernel.org,
        rds-devel@....oracle.com, linux-nfs@...r.kernel.org
Subject: [PATCH 27/33] sctp: export sctp_setsockopt_bindx

And call it directly from dlm instead of going through kernel_setsockopt.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 fs/dlm/lowcomms.c       | 13 ++++++++-----
 include/net/sctp/sctp.h |  3 +++
 net/sctp/socket.c       |  5 +++--
 3 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index b722a09a7ca05..e4939d770df53 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1005,14 +1005,17 @@ static int sctp_bind_addrs(struct connection *con, uint16_t port)
 		memcpy(&localaddr, dlm_local_addr[i], sizeof(localaddr));
 		make_sockaddr(&localaddr, port, &addr_len);
 
-		if (!i)
+		if (!i) {
 			result = kernel_bind(con->sock,
 					     (struct sockaddr *)&localaddr,
 					     addr_len);
-		else
-			result = kernel_setsockopt(con->sock, SOL_SCTP,
-						   SCTP_SOCKOPT_BINDX_ADD,
-						   (char *)&localaddr, addr_len);
+		} else {
+			lock_sock(con->sock->sk);
+			result = sctp_setsockopt_bindx(con->sock->sk,
+					(struct sockaddr *)&localaddr, addr_len,
+					SCTP_BINDX_ADD_ADDR);
+			release_sock(con->sock->sk);
+		}
 
 		if (result < 0) {
 			log_print("Can't bind to %d addr number %d, %d.\n",
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 3ab5c6bbb90bd..f702b14d768ba 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -615,4 +615,7 @@ static inline bool sctp_newsk_ready(const struct sock *sk)
 	return sock_flag(sk, SOCK_DEAD) || sk->sk_socket;
 }
 
+int sctp_setsockopt_bindx(struct sock *sk, struct sockaddr *kaddrs,
+		int addrs_size, int op);
+
 #endif /* __net_sctp_h__ */
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 1c96b52c4aa28..30c981d9f6158 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -979,8 +979,8 @@ int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw)
  *
  * Returns 0 if ok, <0 errno code on error.
  */
-static int sctp_setsockopt_bindx(struct sock *sk, struct sockaddr *kaddrs,
-				 int addrs_size, int op)
+int sctp_setsockopt_bindx(struct sock *sk, struct sockaddr *kaddrs,
+		int addrs_size, int op)
 {
 	int err;
 	int addrcnt = 0;
@@ -1032,6 +1032,7 @@ static int sctp_setsockopt_bindx(struct sock *sk, struct sockaddr *kaddrs,
 		return -EINVAL;
 	}
 }
+EXPORT_SYMBOL(sctp_setsockopt_bindx);
 
 static int sctp_connect_new_asoc(struct sctp_endpoint *ep,
 				 const union sctp_addr *daddr,
-- 
2.26.2