1 /* SPDX-License-Identifier: GPL-2.0 */
2 #include <linux/types.h>
3 #include <net/net_namespace.h>
4 #include <linux/netfilter/nf_conntrack_common.h>
5 #include <linux/netfilter/nf_conntrack_tuple_common.h>
6 #include <net/netfilter/nf_conntrack.h>
7 #include <net/netfilter/nf_conntrack_extend.h>
9 #include <uapi/linux/netfilter/xt_connlabel.h>
11 #define NF_CT_LABELS_MAX_SIZE ((XT_CONNLABEL_MAXBIT + 1) / BITS_PER_BYTE)
13 struct nf_conn_labels {
14 unsigned long bits[NF_CT_LABELS_MAX_SIZE / sizeof(long)];
17 static inline struct nf_conn_labels *nf_ct_labels_find(const struct nf_conn *ct)
19 #ifdef CONFIG_NF_CONNTRACK_LABELS
20 return nf_ct_ext_find(ct, NF_CT_EXT_LABELS);
26 static inline struct nf_conn_labels *nf_ct_labels_ext_add(struct nf_conn *ct)
28 #ifdef CONFIG_NF_CONNTRACK_LABELS
29 struct net *net = nf_ct_net(ct);
31 if (net->ct.labels_used == 0)
34 return nf_ct_ext_add(ct, NF_CT_EXT_LABELS, GFP_ATOMIC);
40 int nf_connlabels_replace(struct nf_conn *ct,
41 const u32 *data, const u32 *mask, unsigned int words);
43 #ifdef CONFIG_NF_CONNTRACK_LABELS
44 int nf_conntrack_labels_init(void);
45 void nf_conntrack_labels_fini(void);
46 int nf_connlabels_get(struct net *net, unsigned int bit);
47 void nf_connlabels_put(struct net *net);
49 static inline int nf_conntrack_labels_init(void) { return 0; }
50 static inline void nf_conntrack_labels_fini(void) {}
51 static inline int nf_connlabels_get(struct net *net, unsigned int bit) { return 0; }
52 static inline void nf_connlabels_put(struct net *net) {}