netfilter: xt_connlimit: use hlist instead
The header of hlist is smaller than list. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
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0e23ca14f8
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3e0d5149e6
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@ -33,14 +33,14 @@
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/* we will save the tuples of all connections we care about */
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struct xt_connlimit_conn {
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struct list_head list;
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struct hlist_node node;
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struct nf_conntrack_tuple tuple;
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union nf_inet_addr addr;
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};
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struct xt_connlimit_data {
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struct list_head iphash[256];
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spinlock_t lock;
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struct hlist_head iphash[256];
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spinlock_t lock;
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};
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static u_int32_t connlimit_rnd __read_mostly;
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@ -102,9 +102,9 @@ static int count_them(struct net *net,
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{
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const struct nf_conntrack_tuple_hash *found;
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struct xt_connlimit_conn *conn;
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struct xt_connlimit_conn *tmp;
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struct hlist_node *pos, *n;
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struct nf_conn *found_ct;
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struct list_head *hash;
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struct hlist_head *hash;
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bool addit = true;
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int matches = 0;
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@ -116,7 +116,7 @@ static int count_them(struct net *net,
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rcu_read_lock();
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/* check the saved connections */
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list_for_each_entry_safe(conn, tmp, hash, list) {
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hlist_for_each_entry_safe(conn, pos, n, hash, node) {
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found = nf_conntrack_find_get(net, NF_CT_DEFAULT_ZONE,
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&conn->tuple);
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found_ct = NULL;
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@ -136,7 +136,7 @@ static int count_them(struct net *net,
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if (found == NULL) {
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/* this one is gone */
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list_del(&conn->list);
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hlist_del(&conn->node);
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kfree(conn);
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continue;
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}
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@ -147,7 +147,7 @@ static int count_them(struct net *net,
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* closed already -> ditch it
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*/
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nf_ct_put(found_ct);
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list_del(&conn->list);
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hlist_del(&conn->node);
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kfree(conn);
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continue;
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}
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@ -167,7 +167,7 @@ static int count_them(struct net *net,
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return -ENOMEM;
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conn->tuple = *tuple;
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conn->addr = *addr;
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list_add(&conn->list, hash);
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hlist_add_head(&conn->node, hash);
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++matches;
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}
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@ -246,7 +246,7 @@ static int connlimit_mt_check(const struct xt_mtchk_param *par)
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spin_lock_init(&info->data->lock);
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for (i = 0; i < ARRAY_SIZE(info->data->iphash); ++i)
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INIT_LIST_HEAD(&info->data->iphash[i]);
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INIT_HLIST_HEAD(&info->data->iphash[i]);
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return 0;
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}
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@ -255,15 +255,15 @@ static void connlimit_mt_destroy(const struct xt_mtdtor_param *par)
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{
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const struct xt_connlimit_info *info = par->matchinfo;
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struct xt_connlimit_conn *conn;
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struct xt_connlimit_conn *tmp;
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struct list_head *hash = info->data->iphash;
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struct hlist_node *pos, *n;
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struct hlist_head *hash = info->data->iphash;
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unsigned int i;
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nf_ct_l3proto_module_put(par->family);
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for (i = 0; i < ARRAY_SIZE(info->data->iphash); ++i) {
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list_for_each_entry_safe(conn, tmp, &hash[i], list) {
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list_del(&conn->list);
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hlist_for_each_entry_safe(conn, pos, n, &hash[i], node) {
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hlist_del(&conn->node);
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kfree(conn);
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}
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}
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