[PATCH net 4/4] mptcp: fix pending data accounting
From: Paolo Abeni <pabeni@redhat.com>
Date: 2020-12-16 11:50:39
Also in:
mptcp
Subsystem:
networking [general], networking [mptcp], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Matthieu Baerts, Mat Martineau, Linus Torvalds
When sendmsg() needs to wait for memory, the pending data
is not updated. That causes a drift in forward memory allocation,
leading to stall and/or warnings at socket close time.
This change addresses the above issue moving the pending data
counter update inside the sendmsg() main loop.
Fixes: 6e628cd3a8f7 ("mptcp: use mptcp release_cb for delayed tasks")
Reviewed-by: Mat Martineau <redacted>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
net/mptcp/protocol.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index b53a91801a6c..09b19aa2f205 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c@@ -1658,6 +1658,7 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) frag_truesize += psize; pfrag->offset += frag_truesize; WRITE_ONCE(msk->write_seq, msk->write_seq + psize); + msk->tx_pending_data += psize; /* charge data on mptcp pending queue to the msk socket * Note: we charge such data both to sk and ssk
@@ -1683,10 +1684,8 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) goto out; } - if (copied) { - msk->tx_pending_data += copied; + if (copied) mptcp_push_pending(sk, msg->msg_flags); - } out: release_sock(sk);
--
2.26.2