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mptcp: tune re-injections for csum enabled mode

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If the MPTCP-level checksum is enabled, on re-injections we
must spool a complete DSS, or the receive side will not be
able to compute the csum and process any data.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2021-06-17 16:46:17 -07:00 committed by David S. Miller
parent dd8bcd1768
commit 4e14867d5e
1 changed files with 5 additions and 3 deletions
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8
net/mptcp/protocol.c
View file

@ -2375,8 +2375,8 @@ static void __mptcp_retrans(struct sock *sk)
/* limit retransmission to the bytes already sent on some subflows */
info.sent = 0;
info.limit = dfrag->already_sent;
while (info.sent < dfrag->already_sent) {
info.limit = READ_ONCE(msk->csum_enabled) ? dfrag->data_len : dfrag->already_sent;
while (info.sent < info.limit) {
if (!mptcp_alloc_tx_skb(sk, ssk))
break;
@ -2388,9 +2388,11 @@ static void __mptcp_retrans(struct sock *sk)
copied += ret;
info.sent += ret;
}
if (copied)
if (copied) {
dfrag->already_sent = max(dfrag->already_sent, info.sent);
tcp_push(ssk, 0, info.mss_now, tcp_sk(ssk)->nonagle,
info.size_goal);
}
mptcp_set_timeout(sk, ssk);
release_sock(ssk);