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xfrm: state: make xfrm_state_lookup_byaddr lockless

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This appears to be an oversight back when the state lookup
was converted to RCU, I see no reason why we need to hold the
state lock here.

__xfrm_state_lookup_byaddr already uses xfrm_state_hold_rcu
helper to obtain a reference, so just replace the state
lock with rcu.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Florian Westphal 2025-03-07 12:47:54 +01:00 • committed by Steffen Klassert
parent 9d381c7708
commit 2e460eefbd
1 changed files with 2 additions and 2 deletions
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4
net/xfrm/xfrm_state.c
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@ -2313,12 +2313,12 @@ xfrm_state_lookup_byaddr(struct net *net, u32 mark,
struct xfrm_hash_state_ptrs state_ptrs;
struct xfrm_state *x;
spin_lock_bh(&net->xfrm.xfrm_state_lock);
rcu_read_lock();
xfrm_hash_ptrs_get(net, &state_ptrs);
x = __xfrm_state_lookup_byaddr(&state_ptrs, mark, daddr, saddr, proto, family);
spin_unlock_bh(&net->xfrm.xfrm_state_lock);
rcu_read_unlock();
return x;
}
EXPORT_SYMBOL(xfrm_state_lookup_byaddr);