From: Paolo Abeni <[email protected]>
After commit 5cf92bbadc58 ("mptcp: re-enable sndbuf autotune"), the
MPTCP_NOSPACE bit is redundant: it is always set and cleared together with
SOCK_NOSPACE.
Let's drop the first and always relay on the latter, dropping a bunch
of useless code.
Signed-off-by: Paolo Abeni <[email protected]>
Reviewed-by: Mat Martineau <[email protected]>
Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>
---
net/mptcp/protocol.c | 15 +++------------
net/mptcp/protocol.h | 16 ++++++----------
2 files changed, 9 insertions(+), 22 deletions(-)
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 76c8861a852b..a3d79e9d0694 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1692,15 +1692,6 @@ static void __mptcp_subflow_push_pending(struct sock *sk, struct sock *ssk, bool
}
}
-static void mptcp_set_nospace(struct sock *sk)
-{
- /* enable autotune */
- set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
-
- /* will be cleared on avail space */
- set_bit(MPTCP_NOSPACE, &mptcp_sk(sk)->flags);
-}
-
static int mptcp_disconnect(struct sock *sk, int flags);
static int mptcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg,
@@ -1874,7 +1865,7 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
continue;
wait_for_memory:
- mptcp_set_nospace(sk);
+ set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
__mptcp_push_pending(sk, msg->msg_flags);
ret = sk_stream_wait_memory(sk, &timeo);
if (ret)
@@ -3945,8 +3936,8 @@ static __poll_t mptcp_check_writeable(struct mptcp_sock *msk)
if (sk_stream_is_writeable(sk))
return EPOLLOUT | EPOLLWRNORM;
- mptcp_set_nospace(sk);
- smp_mb__after_atomic(); /* msk->flags is changed by write_space cb */
+ set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
+ smp_mb__after_atomic(); /* NOSPACE is changed by mptcp_write_space() */
if (sk_stream_is_writeable(sk))
return EPOLLOUT | EPOLLWRNORM;
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index d0a7955b96c4..f0c634e843e6 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -113,10 +113,9 @@
#define MPTCP_RST_TRANSIENT BIT(0)
/* MPTCP socket atomic flags */
-#define MPTCP_NOSPACE 1
-#define MPTCP_WORK_RTX 2
-#define MPTCP_FALLBACK_DONE 4
-#define MPTCP_WORK_CLOSE_SUBFLOW 5
+#define MPTCP_WORK_RTX 1
+#define MPTCP_FALLBACK_DONE 2
+#define MPTCP_WORK_CLOSE_SUBFLOW 3
/* MPTCP socket release cb flags */
#define MPTCP_PUSH_PENDING 1
@@ -810,12 +809,9 @@ static inline bool mptcp_data_fin_enabled(const struct mptcp_sock *msk)
static inline void mptcp_write_space(struct sock *sk)
{
- if (sk_stream_is_writeable(sk)) {
- /* pairs with memory barrier in mptcp_poll */
- smp_mb();
- if (test_and_clear_bit(MPTCP_NOSPACE, &mptcp_sk(sk)->flags))
- sk_stream_write_space(sk);
- }
+ /* pairs with memory barrier in mptcp_poll */
+ smp_mb();
+ sk_stream_write_space(sk);
}
static inline void __mptcp_sync_sndbuf(struct sock *sk)
--
2.43.0