IPVS: Add struct ip_vs_pe

Signed-off-by: Simon Horman <horms@verge.net.au>
Acked-by: Julian Anastasov <ja@ssi.bg>

2 files changed, 29 insertions, 1 deletions

diff --git a/include/linux/ip_vs.h b/include/linux/ip_vs.h
index df7728613720..0a9c44d64292 100644
--- a/include/linux/ip_vs.h
+++ b/include/linux/ip_vs.h
@@ -99,8 +99,10 @@
 				0)
 
 #define IP_VS_SCHEDNAME_MAXLEN	16
+#define IP_VS_PENAME_MAXLEN	16
 #define IP_VS_IFNAME_MAXLEN	16
 
+#define IP_VS_PEDATA_MAXLEN     255
 
 /*
  *	The struct ip_vs_service_user and struct ip_vs_dest_user are
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index d4da774eca75..b6b309d05e4e 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -364,6 +364,10 @@ struct ip_vs_conn_param {
 	__be16				vport;
 	__u16				protocol;
 	u16				af;
+
+	const struct ip_vs_pe		*pe;
+	char				*pe_data;
+	__u8				pe_data_len;
 };
 
 /*
@@ -416,6 +420,9 @@ struct ip_vs_conn {
 	void                    *app_data;      /* Application private data */
 	struct ip_vs_seq        in_seq;         /* incoming seq. struct */
 	struct ip_vs_seq        out_seq;        /* outgoing seq. struct */
+
+	char			*pe_data;
+	__u8			pe_data_len;
 };
 
 
@@ -486,6 +493,9 @@ struct ip_vs_service {
 	struct ip_vs_scheduler	*scheduler;    /* bound scheduler object */
 	rwlock_t		sched_lock;    /* lock sched_data */
 	void			*sched_data;   /* scheduler application data */
+
+	/* alternate persistence engine */
+	struct ip_vs_pe		*pe;
 };
 
 
@@ -549,6 +559,20 @@ struct ip_vs_scheduler {
 				       const struct sk_buff *skb);
 };
 
+/* The persistence engine object */
+struct ip_vs_pe {
+	struct list_head	n_list;		/* d-linked list head */
+	char			*name;		/* scheduler name */
+	atomic_t		refcnt;		/* reference counter */
+	struct module		*module;	/* THIS_MODULE/NULL */
+
+	/* get the connection template, if any */
+	int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb);
+	bool (*ct_match)(const struct ip_vs_conn_param *p,
+			 struct ip_vs_conn *ct);
+	u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval,
+			   bool inverse);
+};
 
 /*
  *	The application module object (a.k.a. app incarnation)
@@ -648,6 +672,8 @@ static inline void ip_vs_conn_fill_param(int af, int protocol,
 	p->cport = cport;
 	p->vaddr = vaddr;
 	p->vport = vport;
+	p->pe = NULL;
+	p->pe_data = NULL;
 }
 
 struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p);
@@ -803,7 +829,7 @@ extern int ip_vs_unbind_scheduler(struct ip_vs_service *svc);
 extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name);
 extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler);
 extern struct ip_vs_conn *
-ip_vs_schedule(struct ip_vs_service *svc, const struct sk_buff *skb);
+ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb);
 extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
 			struct ip_vs_protocol *pp);