6.8-stable review patch. If anyone has any objections, please let me know.
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From: Paolo Abeni pabeni@redhat.com
[ Upstream commit 037db6ea57da7a134a8183dead92d64ef92babee ]
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 pabeni@redhat.com Reviewed-by: Mat Martineau martineau@kernel.org Signed-off-by: Matthieu Baerts (NGI0) matttbe@kernel.org Signed-off-by: David S. Miller davem@davemloft.net Stable-dep-of: bd11dc4fb969 ("mptcp: fix full TCP keep-alive support") Signed-off-by: Sasha Levin sashal@kernel.org --- 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 74c1faec271d1..fcd85adc621c1 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -1687,15 +1687,6 @@ 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, @@ -1869,7 +1860,7 @@ 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) @@ -3944,8 +3935,8 @@ 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 07f6242afc1ae..6b83869ef7938 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 @@ -792,12 +791,9 @@ 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)