net: add sk_stream_is_writeable() helper
Several call sites use the hardcoded following condition :
sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)
Lets use a helper because TCP_NOTSENT_LOWAT support will change this
condition for TCP sockets.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/sock.h b/include/net/sock.h
index e0473f6..d0b5fde 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1088,6 +1088,10 @@
}
#endif
+static inline bool sk_stream_is_writeable(const struct sock *sk)
+{
+ return sk_stream_wspace(sk) >= sk_stream_min_wspace(sk);
+}
static inline bool sk_has_memory_pressure(const struct sock *sk)
{
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index eb0a46a..3be308e 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -409,7 +409,7 @@
* and net/core/stream.c:sk_stream_write_space().
*/
if (con_flag_test(con, CON_FLAG_WRITE_PENDING)) {
- if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) {
+ if (sk_stream_is_writeable(sk)) {
dout("%s %p queueing write work\n", __func__, con);
clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
queue_con(con);
diff --git a/net/core/stream.c b/net/core/stream.c
index f5df85d..512f0a2 100644
--- a/net/core/stream.c
+++ b/net/core/stream.c
@@ -30,7 +30,7 @@
struct socket *sock = sk->sk_socket;
struct socket_wq *wq;
- if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk) && sock) {
+ if (sk_stream_is_writeable(sk) && sock) {
clear_bit(SOCK_NOSPACE, &sock->flags);
rcu_read_lock();
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 6c7c78b8..ba64750 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -336,7 +336,7 @@
mask |= POLLIN | POLLRDNORM;
if (!(sk->sk_shutdown & SEND_SHUTDOWN)) {
- if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) {
+ if (sk_stream_is_writeable(sk)) {
mask |= POLLOUT | POLLWRNORM;
} else { /* send SIGIO later */
set_bit(SOCK_ASYNC_NOSPACE,
@@ -347,7 +347,7 @@
* wspace test but before the flags are set,
* IO signal will be lost.
*/
- if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk))
+ if (sk_stream_is_writeable(sk))
mask |= POLLOUT | POLLWRNORM;
}
}
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 5423223..5eca906 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -499,7 +499,7 @@
mask |= POLLIN | POLLRDNORM;
if (!(sk->sk_shutdown & SEND_SHUTDOWN)) {
- if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) {
+ if (sk_stream_is_writeable(sk)) {
mask |= POLLOUT | POLLWRNORM;
} else { /* send SIGIO later */
set_bit(SOCK_ASYNC_NOSPACE,
@@ -510,7 +510,7 @@
* wspace test but before the flags are set,
* IO signal will be lost.
*/
- if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk))
+ if (sk_stream_is_writeable(sk))
mask |= POLLOUT | POLLWRNORM;
}
} else
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 305374d..0da6785 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -442,7 +442,7 @@
{
struct socket *sock = sk->sk_socket;
- if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk) && sock)
+ if (sk_stream_is_writeable(sk) && sock)
clear_bit(SOCK_NOSPACE, &sock->flags);
svc_write_space(sk);
}
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index ddf0602..d6656d7 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1602,7 +1602,7 @@
read_lock_bh(&sk->sk_callback_lock);
/* from net/core/stream.c:sk_stream_write_space */
- if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk))
+ if (sk_stream_is_writeable(sk))
xs_write_space(sk);
read_unlock_bh(&sk->sk_callback_lock);