/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _NF_CONNTRACK_LABELS_H
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#define _NF_CONNTRACK_LABELS_H
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#include <linux/netfilter/nf_conntrack_common.h>
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#include <linux/netfilter/nf_conntrack_tuple_common.h>
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#include <linux/types.h>
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#include <net/net_namespace.h>
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#include <net/netfilter/nf_conntrack.h>
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#include <net/netfilter/nf_conntrack_extend.h>
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#include <uapi/linux/netfilter/xt_connlabel.h>
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#define NF_CT_LABELS_MAX_SIZE ((XT_CONNLABEL_MAXBIT + 1) / BITS_PER_BYTE)
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struct nf_conn_labels {
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unsigned long bits[NF_CT_LABELS_MAX_SIZE / sizeof(long)];
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};
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static inline struct nf_conn_labels *nf_ct_labels_find(const struct nf_conn *ct)
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{
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#ifdef CONFIG_NF_CONNTRACK_LABELS
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return nf_ct_ext_find(ct, NF_CT_EXT_LABELS);
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#else
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return NULL;
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#endif
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}
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static inline struct nf_conn_labels *nf_ct_labels_ext_add(struct nf_conn *ct)
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{
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#ifdef CONFIG_NF_CONNTRACK_LABELS
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struct net *net = nf_ct_net(ct);
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if (net->ct.labels_used == 0)
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return NULL;
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return nf_ct_ext_add(ct, NF_CT_EXT_LABELS, GFP_ATOMIC);
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#else
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return NULL;
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#endif
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}
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int nf_connlabels_replace(struct nf_conn *ct,
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const u32 *data, const u32 *mask, unsigned int words);
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#ifdef CONFIG_NF_CONNTRACK_LABELS
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int nf_conntrack_labels_init(void);
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void nf_conntrack_labels_fini(void);
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int nf_connlabels_get(struct net *net, unsigned int bit);
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void nf_connlabels_put(struct net *net);
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#else
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static inline int nf_conntrack_labels_init(void) { return 0; }
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static inline void nf_conntrack_labels_fini(void) {}
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static inline int nf_connlabels_get(struct net *net, unsigned int bit) { return 0; }
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static inline void nf_connlabels_put(struct net *net) {}
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#endif
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#endif /* _NF_CONNTRACK_LABELS_H */
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