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Differential D43085

tcp: properly unroll sack transmission on tx error with LRD
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Authored by rscheff on Dec 18 2023, 11:25 AM.
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cc
tuexen
thj
olivier
rrs
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transport
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rGac83f3fa44f3: tcp: properly unroll SACK transmission on TX error with LRD
rGe3b9058e5cd0: tcp: properly unroll sack transmission on tx error with LRD
Summary

While going over the code looing at PR275798, I spotted that
with LRD the rewind of the sackhole retransmission pointer
would not necessarily be calculcated correctly. In particular
with LRD, we point to snd_recover when a hole is fully retransmitted.
Need to account for that in case of a local transmission error.

PR: 275798
MFC after: 1 week

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rG FreeBSD src repository
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sys/
netinet/
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sys/netinet/tcp_output.c

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