Differential D29755

Path MTU discovery hooks for offloaded TCP connections.
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Authored by np on Apr 14 2021, 12:48 AM.

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bz
jhb
glebius

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rG01d74fe1ffc3: Path MTU discovery hooks for offloaded TCP connections.

Summary

Notify the TOE driver when when an ICMP type 3 code 4 (Fragmentation
needed and DF set) message is received for an offloaded connection.
This gives the driver an opportunity to lower the path MTU for the
connection and resume transmission, much like what the kernel does for
the connections that it handles.

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Repository

rG FreeBSD src repository

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Unit

Tests Not Applicable

Event Timeline

np created this revision.Apr 14 2021, 12:48 AM

Herald added a reviewer: transport. · View Herald TranscriptApr 14 2021, 12:48 AM

Herald added subscribers: melifaro, imp. · View Herald Transcript

np requested review of this revision.Apr 14 2021, 12:48 AM

Harbormaster completed remote builds in B38568: Diff 87416.Apr 14 2021, 12:48 AM

glebius accepted this revision.Apr 14 2021, 5:55 PM

This revision was not accepted when it landed; it landed in state Needs Review.Apr 21 2021, 8:02 PM

Closed by commit rG01d74fe1ffc3: Path MTU discovery hooks for offloaded TCP connections. (authored by np). · Explain Why

This revision was automatically updated to reflect the committed changes.

np added a commit: rG01d74fe1ffc3: Path MTU discovery hooks for offloaded TCP connections..

Revision Contents
Changeset List

Path

Size

sys/

netinet/

3 lines

11 lines

80 lines

4 lines

9 lines

Diff 87894

sys/netinet/tcp_offload.h

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sys/netinet/tcp_offload.c

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sys/netinet/tcp_subr.c

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sys/netinet/toecore.h

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sys/netinet/toecore.c

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