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Update MPTCP with a BLEST fix

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Ycarus (Yannick Chabanois) 2019-08-22 22:41:13 +02:00
parent 3ecb98175a
commit 97d48e22fc
1 changed files with 6 additions and 3 deletions
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9
root/target/linux/generic/hack-4.19/690-mptcp_v0.95.patch
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@ -8164,7 +8164,7 @@ diff -aurN linux-4.19.56/net/mptcp/mptcp_binder.c mptcp-mptcp_v0.95/net/mptcp/mp
diff -aurN linux-4.19.56/net/mptcp/mptcp_blest.c mptcp-mptcp_v0.95/net/mptcp/mptcp_blest.c
--- linux-4.19.56/net/mptcp/mptcp_blest.c 1970-01-01 01:00:00.000000000 +0100
+++ mptcp-mptcp_v0.95/net/mptcp/mptcp_blest.c 2019-07-05 08:00:07.000000000 +0200
@@ -0,0 +1,475 @@
@@ -0,0 +1,478 @@
+// SPDX-License-Identifier: GPL-2.0
+/* MPTCP Scheduler to reduce HoL-blocking and spurious retransmissions.
+ *
@ -8367,7 +8367,7 @@ diff -aurN linux-4.19.56/net/mptcp/mptcp_blest.c mptcp-mptcp_v0.95/net/mptcp/mpt
+
+ /* if we decided to use a slower flow, we have the option of not using it at all */
+ if (bestsk && minsk && bestsk != minsk) {
+ u32 slow_linger_time, fast_bytes, slow_inflight_bytes, slow_bytes, avail_space;
+ u32 slow_linger_time, fast_bytes, buffered_bytes, slow_inflight_bytes, slow_bytes, avail_space;
+
+ meta_tp = tcp_sk(meta_sk);
+ besttp = tcp_sk(bestsk);
@ -8380,13 +8380,16 @@ diff -aurN linux-4.19.56/net/mptcp/mptcp_blest.c mptcp-mptcp_v0.95/net/mptcp/mpt
+ slow_linger_time = blestsched_estimate_linger_time(bestsk);
+ fast_bytes = blestsched_estimate_bytes(minsk, slow_linger_time);
+
+ if (skb)
+ buffered_bytes = skb->len;
+
+ /* is the required space available in the mptcp meta send window?
+ * we assume that all bytes inflight on the slow path will be acked in besttp->srtt seconds
+ * (just like the SKB if it was sent now) -> that means that those inflight bytes will
+ * keep occupying space in the meta window until then
+ */
+ slow_inflight_bytes = besttp->write_seq - besttp->snd_una;
+ slow_bytes = skb->len + slow_inflight_bytes; // bytes of this SKB plus those in flight already
+ slow_bytes = buffered_bytes + slow_inflight_bytes; // bytes of this SKB plus those in flight already
+
+ avail_space = (slow_bytes < meta_tp->snd_wnd) ? (meta_tp->snd_wnd - slow_bytes) : 0;
+