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Make use of the stats(3) framework in the TCP stack.

Description

Make use of the stats(3) framework in the TCP stack.

This makes it possible to retrieve per-connection statistical
information such as the receive window size, RTT, or goodput,
using a newly added TCP_STATS getsockopt(3) option, and extract
them using the stats_voistat_fetch(3) API.

See the net/tcprtt port for an example consumer of this API.

Compared to the existing TCP_INFO system, the main differences
are that this mechanism is easy to extend without breaking ABI,
and provides statistical information instead of raw "snapshots"
of values at a given point in time. stats(3) is more generic
and can be used in both userland and the kernel.

Reviewed by: thj
Tested by: thj
Obtained from: Netflix
Relnotes: yes
Sponsored by: Klara Inc, Netflix
Differential Revision: https://reviews.freebsd.org/D20655

Details

Committed
traszDec 2 2019, 8:58 PM
Reviewer
thj
Differential Revision
D20655: Make use of stats(3) in the TCP stack
Parents
rS355303: MFC r355141:
Branches
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Tags
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