net: hsr: Fix PRP duplicate detection

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Add PRP specific function for handling duplicate
packets. This is needed because of potential
L2 802.1p prioritization done by network switches.

The L2 prioritization can re-order the PRP packets
from a node causing the existing implementation to
discard the frame(s) that have been received 'late'
because the sequence number is before the previous
received packet. This can happen if the node is
sending multiple frames back-to-back with different
priority.

Signed-off-by: Jaakko Karrenpalo <jkarrenpalo@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250307161700.1045-1-jkarrenpalo@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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This commit is contained in:

Jaakko Karrenpalo 2025-03-07 18:16:59 +02:00 • committed by Paolo Abeni

parent 676cc91e1f

commit 05fd00e5e7

5 changed files with 104 additions and 7 deletions

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2

net/hsr/hsr_device.c

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4

net/hsr/hsr_forward.c

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95

net/hsr/hsr_framereg.c

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net/hsr/hsr_framereg.h

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net/hsr/hsr_main.h

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