From 0bcb38a9c5d38638aed4257a143e8bdd7a2d9b3f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 29 May 2020 14:09:40 +0200 Subject: [PATCH] sctp: add sctp_sock_set_nodelay Add a helper to directly set the SCTP_NODELAY sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig Acked-by: Marcelo Ricardo Leitner Signed-off-by: David S. Miller --- fs/dlm/lowcomms.c | 10 ++-------- include/net/sctp/sctp.h | 7 +++++++ 2 files changed, 9 insertions(+), 8 deletions(-) diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c index 69333728d871b..9f1c3cdc9d653 100644 --- a/fs/dlm/lowcomms.c +++ b/fs/dlm/lowcomms.c @@ -914,7 +914,6 @@ static int sctp_bind_addrs(struct connection *con, uint16_t port) static void sctp_connect_to_sock(struct connection *con) { struct sockaddr_storage daddr; - int one = 1; int result; int addr_len; struct socket *sock; @@ -961,8 +960,7 @@ static void sctp_connect_to_sock(struct connection *con) log_print("connecting to %d", con->nodeid); /* Turn off Nagle's algorithm */ - kernel_setsockopt(sock, SOL_SCTP, SCTP_NODELAY, (char *)&one, - sizeof(one)); + sctp_sock_set_nodelay(sock->sk); /* * Make sock->ops->connect() function return in specified time, @@ -1176,7 +1174,6 @@ static int sctp_listen_for_all(void) struct socket *sock = NULL; int result = -EINVAL; struct connection *con = nodeid2con(0, GFP_NOFS); - int one = 1; if (!con) return -ENOMEM; @@ -1191,10 +1188,7 @@ static int sctp_listen_for_all(void) } sock_set_rcvbuf(sock->sk, NEEDED_RMEM); - result = kernel_setsockopt(sock, SOL_SCTP, SCTP_NODELAY, (char *)&one, - sizeof(one)); - if (result < 0) - log_print("Could not set SCTP NODELAY error %d\n", result); + sctp_sock_set_nodelay(sock->sk); write_lock_bh(&sock->sk->sk_callback_lock); /* Init con struct */ diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h index 3ab5c6bbb90bd..f8bcb75bb0448 100644 --- a/include/net/sctp/sctp.h +++ b/include/net/sctp/sctp.h @@ -615,4 +615,11 @@ static inline bool sctp_newsk_ready(const struct sock *sk) return sock_flag(sk, SOCK_DEAD) || sk->sk_socket; } +static inline void sctp_sock_set_nodelay(struct sock *sk) +{ + lock_sock(sk); + sctp_sk(sk)->nodelay = true; + release_sock(sk); +} + #endif /* __net_sctp_h__ */ -- 2.39.5