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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 <hch@lst.de>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig 2020-05-29 14:09:40 +02:00 committed by David S. Miller
parent f26e9b2c0b
commit 40ef92c6ec
2 changed files with 9 additions and 8 deletions
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10
fs/dlm/lowcomms.c
View File

@ -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 */

7
include/net/sctp/sctp.h
View File

@ -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__ */