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| author | Yuchung Cheng <ycheng@google.com> | 2013-01-31 11:16:46 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-02-14 10:48:34 -0800 |
| commit | 3005cf62aac8c1b68c0201ead876b30a6c0f9ddd (patch) | |
| tree | 449560481ad3af88b979eacc354d59092f5888d0 /lib/debugobjects.c | |
| parent | 3cea56174bd3d79f8bb9ec500dfc95c4660a6ca9 (diff) | |
tcp: detect SYN/data drop when F-RTO is disabled
[ Upstream commit 66555e92fb7a619188c02cceae4bbc414f15f96d ]
On receiving the SYN-ACK, Fast Open checks icsk_retransmit for SYN
retransmission to detect SYN/data drops. But if F-RTO is disabled,
icsk_retransmit is reset at step D of tcp_fastretrans_alert() (
under tcp_ack()) before tcp_rcv_fastopen_synack(). The fix is to use
total_retrans instead which accounts for SYN retransmission regardless
the use of F-RTO.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/debugobjects.c')
0 files changed, 0 insertions, 0 deletions