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tcp: cleanup scoreboard after recovery

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Type: fix

When recovering from congestion, remove last hole in scoreboard if it
covers all bytes sent above snd_congestion.

Change-Id: I752accd4590cd9bf553c35a1bb40a38c308c04f5
Signed-off-by: Florin Coras <fcoras@cisco.com>
This commit is contained in:
Florin Coras
2019-09-12 18:49:44 -07:00
parent 3b2db9002c
commit 321cfa5fcb
1 changed files with 7 additions and 0 deletions
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7
src/vnet/tcp/tcp_input.c
View File

@ -1298,7 +1298,14 @@ tcp_cc_is_spurious_retransmit (tcp_connection_t * tc)
static int
tcp_cc_recover (tcp_connection_t * tc)
{
sack_scoreboard_hole_t *hole;
ASSERT (tcp_in_cong_recovery (tc));
hole = scoreboard_first_hole (&tc->sack_sb);
if (hole && hole->start == tc->snd_una && hole->end == tc->snd_nxt)
scoreboard_clear (&tc->sack_sb);
if (tcp_cc_is_spurious_retransmit (tc))
{
tcp_cc_congestion_undo (tc);