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Differential D51792

tcp: store flowid info in syncache
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Authored by glebius on Aug 7 2025, 3:22 PM.
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melifaro
p.mousavizadeh_protonmail.com
tuexen

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gallatin
tuexen
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transport
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rG73fe85e486d2: tcp: store flowid info in syncache
Summary

Now retransmissions by syncache would use correct flowid, same as
synchronous responds.

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rG FreeBSD src repository
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Event Timeline

glebius created this revision.Aug 7 2025, 3:22 PM
Herald added 1 blocking reviewer(s): transport. · View Herald TranscriptAug 7 2025, 3:22 PM
Herald added subscribers: melifaro, imp. · View Herald Transcript
glebius requested review of this revision.Aug 7 2025, 3:22 PM
Harbormaster completed remote builds in B66063: Diff 159968.Aug 7 2025, 3:22 PM
tuexen added a subscriber: tuexen.Aug 11 2025, 10:06 PM

It looks like the syncache changes just ensure that you are sending syncache driven retransmissions with the same flowid than the original one, right?
I think that part of this review is without any discussion. Why not get that in as a separate commit. That allows us to focus on the problem of the client side...

p.mousavizadeh_protonmail.com added a subscriber: p.mousavizadeh_protonmail.com.Sep 18 2025, 3:26 PM
glebius updated this revision to Diff 166977.Sat, Nov 22, 6:52 PM
  • Rebase on main.
  • Separate tcp_input() change into its own commit.
Harbormaster completed remote builds in B68811: Diff 166977.Sat, Nov 22, 6:52 PM
glebius added a child revision: D53886: tcp: don't set flowid in tcp_input().Sat, Nov 22, 6:53 PM
glebius edited the summary of this revision. (Show Details)Sat, Nov 22, 6:53 PM
glebius added a reviewer: gallatin.
tuexen accepted this revision.Sun, Nov 23, 8:51 AM
This revision is now accepted and ready to land.Sun, Nov 23, 8:51 AM
gallatin accepted this revision.Mon, Nov 24, 12:53 AM
tuexen added inline comments.Mon, Nov 24, 9:52 PM
sys/netinet/tcp_syncache.h
78–79

Isn't a uint8_t good enough for sc_flowtype? Wouldn't moving a uint8_t sc_flowtype before sc_flags save 4 bytes?

Closed by commit rG73fe85e486d2: tcp: store flowid info in syncache (authored by glebius). · Explain WhyWed, Dec 3, 11:20 PM
This revision was automatically updated to reflect the committed changes.
glebius added a commit: rG73fe85e486d2: tcp: store flowid info in syncache.

Revision Contents
Changeset List

PathSize
sys/
netinet/
2 lines
8 lines
101 lines

Diff 167505

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sys/netinet/tcp_input.c

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sys/netinet/tcp_syncache.h

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sys/netinet/tcp_syncache.c

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