netfilter: nft_set_rbtree: use read spinlock to avoid datapath contention

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commit 96b33300fb upstream.

rbtree GC does not modify the datastructure, instead it collects expired
elements and it enqueues a GC transaction. Use a read spinlock instead
to avoid data contention while GC worker is running.

Fixes: f6c383b8c3 ("netfilter: nf_tables: adapt set backend to use GC transaction API")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Pablo Neira Ayuso 2023-09-22 18:30:25 +02:00 • committed by Greg Kroah-Hartman

parent 9a8c544158

commit 92b4b4bde9

1 changed files with 2 additions and 4 deletions

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net/netfilter/nft_set_rbtree.c

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