[NETFILTER]: nf_nat: use RCU for bysource hash
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/netfilter/nf_nat_core.c b/net/ipv4/netfilter/nf_nat_core.c
index c07575d..c7a985f 100644
--- a/net/ipv4/netfilter/nf_nat_core.c
+++ b/net/ipv4/netfilter/nf_nat_core.c
@@ -154,8 +154,8 @@
struct nf_conn *ct;
struct hlist_node *n;
- read_lock_bh(&nf_nat_lock);
- hlist_for_each_entry(nat, n, &bysource[h], bysource) {
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(nat, n, &bysource[h], bysource) {
ct = nat->ct;
if (same_src(ct, tuple)) {
/* Copy source part from reply tuple. */
@@ -164,12 +164,12 @@
result->dst = tuple->dst;
if (in_range(result, range)) {
- read_unlock_bh(&nf_nat_lock);
+ rcu_read_unlock();
return 1;
}
}
}
- read_unlock_bh(&nf_nat_lock);
+ rcu_read_unlock();
return 0;
}
@@ -334,7 +334,7 @@
/* nf_conntrack_alter_reply might re-allocate exntension aera */
nat = nfct_nat(ct);
nat->ct = ct;
- hlist_add_head(&nat->bysource, &bysource[srchash]);
+ hlist_add_head_rcu(&nat->bysource, &bysource[srchash]);
write_unlock_bh(&nf_nat_lock);
}
@@ -595,7 +595,7 @@
NF_CT_ASSERT(nat->ct->status & IPS_NAT_DONE_MASK);
write_lock_bh(&nf_nat_lock);
- hlist_del(&nat->bysource);
+ hlist_del_rcu(&nat->bysource);
nat->ct = NULL;
write_unlock_bh(&nf_nat_lock);
}