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[NETFILTER]: nf_nat: use RCU for bysource hash

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Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2008-01-31 04:42:37 -08:00 committed by David S. Miller
parent c88130bcd5
commit 4d354c5782
1 changed files with 6 additions and 6 deletions
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12
net/ipv4/netfilter/nf_nat_core.c
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@ -154,8 +154,8 @@ find_appropriate_src(const struct nf_conntrack_tuple *tuple,
struct nf_conn *ct; struct nf_conn *ct;
struct hlist_node *n; struct hlist_node *n;
read_lock_bh(&nf_nat_lock); rcu_read_lock();
hlist_for_each_entry(nat, n, &bysource[h], bysource) { hlist_for_each_entry_rcu(nat, n, &bysource[h], bysource) {
ct = nat->ct; ct = nat->ct;
if (same_src(ct, tuple)) { if (same_src(ct, tuple)) {
/* Copy source part from reply tuple. */ /* Copy source part from reply tuple. */
@ -164,12 +164,12 @@ find_appropriate_src(const struct nf_conntrack_tuple *tuple,
result->dst = tuple->dst; result->dst = tuple->dst;
if (in_range(result, range)) { if (in_range(result, range)) {
read_unlock_bh(&nf_nat_lock); rcu_read_unlock();
return 1; return 1;
} }
} }
} }
read_unlock_bh(&nf_nat_lock); rcu_read_unlock();
return 0; return 0;
} }
@ -334,7 +334,7 @@ nf_nat_setup_info(struct nf_conn *ct,
/* nf_conntrack_alter_reply might re-allocate exntension aera */ /* nf_conntrack_alter_reply might re-allocate exntension aera */
nat = nfct_nat(ct); nat = nfct_nat(ct);
nat->ct = 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); write_unlock_bh(&nf_nat_lock);
} }
@ -595,7 +595,7 @@ static void nf_nat_cleanup_conntrack(struct nf_conn *ct)
NF_CT_ASSERT(nat->ct->status & IPS_NAT_DONE_MASK); NF_CT_ASSERT(nat->ct->status & IPS_NAT_DONE_MASK);
write_lock_bh(&nf_nat_lock); write_lock_bh(&nf_nat_lock);
hlist_del(&nat->bysource); hlist_del_rcu(&nat->bysource);
nat->ct = NULL; nat->ct = NULL;
write_unlock_bh(&nf_nat_lock); write_unlock_bh(&nf_nat_lock);
} }