diff options
author | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2009-02-27 22:38:28 +0000 |
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committer | David S. Miller <davem@davemloft.net> | 2009-03-02 03:07:23 -0800 |
commit | 361a5c1dd0bd7bb2b90e7fe9127b366d3566522e (patch) | |
tree | 440150dfa03f976d4ef6d3062744f2185373820d /fs/btrfs | |
parent | 9ce01461028d595a6f1cd724fbd7a0dd70464fe4 (diff) |
dccp: Minimise header option overhead in setting the MPS
This patch resolves a long-standing FIXME to dynamically update the Maximum
Packet Size depending on actual options usage.
It uses the flags set by the feature-negotiation infrastructure to compute
the required header option size.
Most options are fixed-size, a notable exception are Ack Vectors (required
currently only by CCID-2). These can have any length between 3 and 1020
bytes. As a result of testing, 16 bytes (2 bytes for type/length plus 14 Ack
Vector cells) have been found to be sufficient for loss-free situations.
There are currently no CCID-specific header options which may appear on data
packets, thus it is not necessary to define a corresponding CCID field as
suggested in the old comment.
Further changes:
----------------
Adjusted the type of 'cur_mps' to match the unsigned return type of the
function.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/btrfs')
0 files changed, 0 insertions, 0 deletions