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author | bz <bz@FreeBSD.org> | 2012-02-15 16:09:56 +0000 |
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committer | bz <bz@FreeBSD.org> | 2012-02-15 16:09:56 +0000 |
commit | e7eef5c8119b66a2a14b9e339e440f80c327182a (patch) | |
tree | b0aa46ec2c710c27495fdbd3425f1e1e7f502603 /sys/powerpc/powermac/smusat.c | |
parent | d93961fe9edf9c6624e6d6c918343387bf79d54e (diff) | |
download | FreeBSD-src-e7eef5c8119b66a2a14b9e339e440f80c327182a.zip FreeBSD-src-e7eef5c8119b66a2a14b9e339e440f80c327182a.tar.gz |
Fix PAWS (Protect Against Wrapped Sequence numbers) in cases when
hz >> 1000 and thus getting outside the timestamp clock frequenceny of
1ms < x < 1s per tick as mandated by RFC1323, leading to connection
resets on idle connections.
Always use a granularity of 1ms using getmicrouptime() making all but
relevant callouts independent of hz.
Use getmicrouptime(), not getmicrotime() as the latter may make a jump
possibly breaking TCP nfsroot mounts having our timestamps move forward
for more than 24.8 days in a second without having been idle for that
long.
PR: kern/61404
Reviewed by: jhb, mav, rrs
Discussed with: silby, lstewart
Sponsored by: Sandvine Incorporated (originally in 2011)
MFC after: 6 weeks
Diffstat (limited to 'sys/powerpc/powermac/smusat.c')
0 files changed, 0 insertions, 0 deletions