batman-adv: tp_meter: use locking for all congestion control variables

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Some variables used atomic_t for concurrent access while others relied on
cwnd_lock, leading to an inconsistent locking model. This can be simplified
by:

* keeping all congestion control decisions inside the cc_lock
* variables which can be accessed without a lock must use
  READ_ONCE/WRITE_ONE

This is only possible, by extracting the congestion control logic from
batadv_tp_recv_ack() into a new helper batadv_tp_handle_ack(). Its
decisions are returned as a batadv_tp_ack_reaction enum value and then
applied by the caller. This separates the algorithm (deciding what to do)
from the mechanism (actually doing it).

Signed-off-by: Sven Eckelmann <sven@narfation.org>

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Sven Eckelmann 2026-05-12 19:37:05 +02:00

parent feb4a390a5

commit a7eff94024

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326

net/batman-adv/tp_meter.c

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8

net/batman-adv/types.h

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