rxrpc: Only set DF=1 on initial DATA transmission

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Change how the DF flag is managed on DATA transmissions.  Set it on initial
transmission and don't set it on retransmissions.  Then remove the handling
for EMSGSIZE in rxrpc_send_data_packet() and just pretend it didn't happen,
leaving it to the retransmission path to retry.

The path-MTU discovery using PING ACKs is then used to probe for the
maximum DATA size - though notification by ICMP will be used if one is
received.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Link: https://patch.msgid.link/20241204074710.990092-16-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

David Howells 2024-12-04 07:46:43 +00:00 • committed by Jakub Kicinski

parent cd69a07b6d

commit 81e7761be5

3 changed files with 20 additions and 18 deletions

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1

net/rxrpc/ar-internal.h

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32

net/rxrpc/output.c

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5

net/rxrpc/proc.c

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