batman-adv: tt: use protected flag modifications

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The flags of translation table entries are modified in various places using
RMW operations like:

* read flags + add flag + store
* read flags + remove flag + store

These were done without making sure that no other context is doing a
similar operation at the same time. If another context does modify the
flags then it could happen that a store of the flag modifications is simply
lost. This problem can usually be fixed at a later point when the flags are
tried to be adjusted again.

To reduce the time the wrong flags are used, it is better to use a TT entry
specific spinlock when accessing the u16.

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

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Sven Eckelmann 2026-08-30 17:21:42 +02:00

parent 52d8c713f4

commit 976b159b3c

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351

net/batman-adv/translation-table.c

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11

net/batman-adv/types.h

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