diff options
| author | David Morley <morleyd@google.com> | 2023-10-06 01:18:40 +0000 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-10-10 10:02:59 +0200 |
| commit | 95b9a87c6a6b708cccda1f9b7baf9920b80cdabf (patch) | |
| tree | d06f62ced178016f8a07a882290350d1b01ca1a9 /include/net/inet_connection_sock.h | |
| parent | 8cea95b0bd7930367f11e2abceda6e096dd18943 (diff) | |
tcp: record last received ipv6 flowlabel
In order to better estimate whether a data packet has been
retransmitted or is the result of a TLP, we save the last received
ipv6 flowlabel.
To make space for this field we resize the "ato" field in
inet_connection_sock as the current value of TCP_DELACK_MAX can be
fully contained in 8 bits and add a compile_time_assert ensuring this
field is the required size.
v2: addressed kernel bot feedback about dccp_delack_timer()
v3: addressed build error introduced by commit bbf80d713fe7 ("tcp:
derive delack_max from rto_min")
Signed-off-by: David Morley <morleyd@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Tested-by: David Morley <morleyd@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include/net/inet_connection_sock.h')
| -rw-r--r-- | include/net/inet_connection_sock.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h index 5d2fcc137b88..d6d9d1c1985a 100644 --- a/include/net/inet_connection_sock.h +++ b/include/net/inet_connection_sock.h @@ -114,7 +114,10 @@ struct inet_connection_sock { __u8 quick; /* Scheduled number of quick acks */ __u8 pingpong; /* The session is interactive */ __u8 retry; /* Number of attempts */ - __u32 ato; /* Predicted tick of soft clock */ + #define ATO_BITS 8 + __u32 ato:ATO_BITS, /* Predicted tick of soft clock */ + lrcv_flowlabel:20, /* last received ipv6 flowlabel */ + unused:4; unsigned long timeout; /* Currently scheduled timeout */ __u32 lrcvtime; /* timestamp of last received data packet */ __u16 last_seg_size; /* Size of last incoming segment */ |