diff options
| author |   Florian Westphal <fw@strlen.de> | 2020-01-21 16:56:25 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-01-24 13:44:08 +0100 |
| commit | 1891c4a07672b300b3160ceec59755063b20222b (patch) | |
| tree | a8b22813609ac268086d3a4b65260711f97978ce /net/mptcp/subflow.c | |
| parent | mptcp: Implement MPTCP receive path (diff) | |
| download | wireguard-linux-1891c4a07672b300b3160ceec59755063b20222b.tar.xz wireguard-linux-1891c4a07672b300b3160ceec59755063b20222b.zip | |
mptcp: add subflow write space signalling and mptcp_poll
Add new SEND_SPACE flag to indicate that a subflow has enough space to
accept more data for transmission.
It gets cleared at the end of mptcp_sendmsg() in case ssk has run
below the free watermark.
It is (re-set) from the wspace callback.
This allows us to use msk->flags to determine the poll mask.
Co-developed-by: Peter Krystad <peter.krystad@linux.intel.com>
Signed-off-by: Peter Krystad <peter.krystad@linux.intel.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | net/mptcp/subflow.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 528351e26371..9fb3eb87a20f 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -529,6 +529,9 @@ static void subflow_write_space(struct sock *sk) sk_stream_write_space(sk); if (parent && sk_stream_is_writeable(sk)) { + set_bit(MPTCP_SEND_SPACE, &mptcp_sk(parent)->flags); + smp_mb__after_atomic(); + /* set SEND_SPACE before sk_stream_write_space clears NOSPACE */ sk_stream_write_space(parent); } } |