Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / net / netfilter / nf_conntrack_extend.h

diff --git a/kernel/include/net/netfilter/nf_conntrack_extend.h b/kernel/include/net/netfilter/nf_conntrack_extend.h
new file mode 100644 (file)
index 0000000..55d1504
--- /dev/null
+++ b/kernel/include/net/netfilter/nf_conntrack_extend.h
@@ -0,0 +1,123 @@
+#ifndef _NF_CONNTRACK_EXTEND_H
+#define _NF_CONNTRACK_EXTEND_H
+
+#include <linux/slab.h>
+
+#include <net/netfilter/nf_conntrack.h>
+
+enum nf_ct_ext_id {
+       NF_CT_EXT_HELPER,
+#if defined(CONFIG_NF_NAT) || defined(CONFIG_NF_NAT_MODULE)
+       NF_CT_EXT_NAT,
+#endif
+       NF_CT_EXT_SEQADJ,
+       NF_CT_EXT_ACCT,
+#ifdef CONFIG_NF_CONNTRACK_EVENTS
+       NF_CT_EXT_ECACHE,
+#endif
+#ifdef CONFIG_NF_CONNTRACK_ZONES
+       NF_CT_EXT_ZONE,
+#endif
+#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
+       NF_CT_EXT_TSTAMP,
+#endif
+#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
+       NF_CT_EXT_TIMEOUT,
+#endif
+#ifdef CONFIG_NF_CONNTRACK_LABELS
+       NF_CT_EXT_LABELS,
+#endif
+#if IS_ENABLED(CONFIG_NETFILTER_SYNPROXY)
+       NF_CT_EXT_SYNPROXY,
+#endif
+       NF_CT_EXT_NUM,
+};
+
+#define NF_CT_EXT_HELPER_TYPE struct nf_conn_help
+#define NF_CT_EXT_NAT_TYPE struct nf_conn_nat
+#define NF_CT_EXT_SEQADJ_TYPE struct nf_conn_seqadj
+#define NF_CT_EXT_ACCT_TYPE struct nf_conn_acct
+#define NF_CT_EXT_ECACHE_TYPE struct nf_conntrack_ecache
+#define NF_CT_EXT_ZONE_TYPE struct nf_conntrack_zone
+#define NF_CT_EXT_TSTAMP_TYPE struct nf_conn_tstamp
+#define NF_CT_EXT_TIMEOUT_TYPE struct nf_conn_timeout
+#define NF_CT_EXT_LABELS_TYPE struct nf_conn_labels
+#define NF_CT_EXT_SYNPROXY_TYPE struct nf_conn_synproxy
+
+/* Extensions: optional stuff which isn't permanently in struct. */
+struct nf_ct_ext {
+       struct rcu_head rcu;
+       u16 offset[NF_CT_EXT_NUM];
+       u16 len;
+       char data[0];
+};
+
+static inline bool __nf_ct_ext_exist(const struct nf_ct_ext *ext, u8 id)
+{
+       return !!ext->offset[id];
+}
+
+static inline bool nf_ct_ext_exist(const struct nf_conn *ct, u8 id)
+{
+       return (ct->ext && __nf_ct_ext_exist(ct->ext, id));
+}
+
+static inline void *__nf_ct_ext_find(const struct nf_conn *ct, u8 id)
+{
+       if (!nf_ct_ext_exist(ct, id))
+               return NULL;
+
+       return (void *)ct->ext + ct->ext->offset[id];
+}
+#define nf_ct_ext_find(ext, id)        \
+       ((id##_TYPE *)__nf_ct_ext_find((ext), (id)))
+
+/* Destroy all relationships */
+void __nf_ct_ext_destroy(struct nf_conn *ct);
+static inline void nf_ct_ext_destroy(struct nf_conn *ct)
+{
+       if (ct->ext)
+               __nf_ct_ext_destroy(ct);
+}
+
+/* Free operation. If you want to free a object referred from private area,
+ * please implement __nf_ct_ext_free() and call it.
+ */
+static inline void nf_ct_ext_free(struct nf_conn *ct)
+{
+       if (ct->ext)
+               kfree_rcu(ct->ext, rcu);
+}
+
+/* Add this type, returns pointer to data or NULL. */
+void *__nf_ct_ext_add_length(struct nf_conn *ct, enum nf_ct_ext_id id,
+                            size_t var_alloc_len, gfp_t gfp);
+
+#define nf_ct_ext_add(ct, id, gfp) \
+       ((id##_TYPE *)__nf_ct_ext_add_length((ct), (id), 0, (gfp)))
+#define nf_ct_ext_add_length(ct, id, len, gfp) \
+       ((id##_TYPE *)__nf_ct_ext_add_length((ct), (id), (len), (gfp)))
+
+#define NF_CT_EXT_F_PREALLOC   0x0001
+
+struct nf_ct_ext_type {
+       /* Destroys relationships (can be NULL). */
+       void (*destroy)(struct nf_conn *ct);
+       /* Called when realloacted (can be NULL).
+          Contents has already been moved. */
+       void (*move)(void *new, void *old);
+
+       enum nf_ct_ext_id id;
+
+       unsigned int flags;
+
+       /* Length and min alignment. */
+       u8 len;
+       u8 align;
+       /* initial size of nf_ct_ext. */
+       u8 alloc_size;
+};
+
+int nf_ct_extend_register(struct nf_ct_ext_type *type);
+void nf_ct_extend_unregister(struct nf_ct_ext_type *type);
+#endif /* _NF_CONNTRACK_EXTEND_H */