From: Geliang Tang <[email protected]> Future extensions with psock will override their own sk->sk_write_space callback. This patch ensures that the overridden sk_write_space can be invoked by MPTCP.
INDIRECT_CALL is used to keep the default path optimised. This patch is shared early to ease discussions around future RFC and avoid confusions with this "fix" that is needed for different future extensions. Suggested-by: Paolo Abeni <[email protected]> Co-developed-by: Gang Yan <[email protected]> Signed-off-by: Gang Yan <[email protected]> Signed-off-by: Geliang Tang <[email protected]> Reviewed-by: Matthieu Baerts (NGI0) <[email protected]> Signed-off-by: Matthieu Baerts (NGI0) <[email protected]> --- net/mptcp/protocol.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index f4bfe91ca7f9..0bd1ee860316 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -975,7 +975,7 @@ static inline void mptcp_write_space(struct sock *sk) /* pairs with memory barrier in mptcp_poll */ smp_mb(); if (mptcp_stream_memory_free(sk, 1)) - sk_stream_write_space(sk); + INDIRECT_CALL_1(sk->sk_write_space, sk_stream_write_space, sk); } static inline void __mptcp_sync_sndbuf(struct sock *sk) -- 2.51.0
