| Message ID | 20200529120943.101454-2-hch@lst.de |
|---|---|
| State | Accepted |
| Delegated to: | David Miller |
| Headers | show |
| Series | [1/4] sctp: add sctp_sock_set_nodelay | expand |
On Fri, May 29, 2020 at 02:09:40PM +0200, Christoph Hellwig wrote: > 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> I'm taking the action item to make sctp_setsockopt_nodelay() use the new helper. Will likely create a __ variant of it, due to sock lock. > --- > 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__ */ > -- > 2.26.2 >
On Fri, May 29, 2020 at 02:09:40PM +0200, Christoph Hellwig wrote: > Add a helper to directly set the SCTP_NODELAY sockopt from kernel space > without going through a fake uaccess. Ack, they look fine to me, thanks. Dave
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__ */
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> --- fs/dlm/lowcomms.c | 10 ++-------- include/net/sctp/sctp.h | 7 +++++++ 2 files changed, 9 insertions(+), 8 deletions(-)