lb_vip_t Struct Reference

Load balancing service is provided per VIP. More...

Collaboration diagram for lb_vip_t:

Data Fields
lb_new_flow_entry_t *	new_flow_table
	Vector mapping (flow-hash & new_connect_table_mask) to AS index. More...
u32	new_flow_table_mask
	New flows table length - 1 (length MUST be a power of 2) More...
u32	last_garbage_collection
	Last time garbage collection was run to free the ASs. More...
ip46_address_t	prefix
	A Virtual IP represents a given service delivered by a set of application servers. More...
u8	plen
	The VIP prefix length. More...
lb_vip_type_t	type
	The type of traffic for this. More...
u8	flags
	Flags related to this VIP. More...
u32 *	as_indexes
	Pool of AS indexes used for this VIP. More...

Detailed Description

Load balancing service is provided per VIP.

In this data model, a VIP can be a whole prefix. But load balancing only occurs on a per-source-address/port basis. Meaning that if a given source reuses the same port for multiple destinations within the same VIP, they will be considered as a single flow.

Definition at line 154 of file lb.h.

Field Documentation

u32* lb_vip_t::as_indexes

Pool of AS indexes used for this VIP.

This also includes ASs that have been removed (but are still referenced).

Definition at line 212 of file lb.h.

u8 lb_vip_t::flags

Flags related to this VIP.

LB_VIP_FLAGS_USED means the VIP is active. When it is not set, the VIP in the process of being removed. We cannot immediately remove a VIP because the VIP index still may be stored in the adjacency index.

Definition at line 205 of file lb.h.

u32 lb_vip_t::last_garbage_collection

Last time garbage collection was run to free the ASs.

Definition at line 173 of file lb.h.

lb_new_flow_entry_t* lb_vip_t::new_flow_table

Vector mapping (flow-hash & new_connect_table_mask) to AS index.

This is used for new flows.

Definition at line 162 of file lb.h.

u32 lb_vip_t::new_flow_table_mask

New flows table length - 1 (length MUST be a power of 2)

Definition at line 168 of file lb.h.

u8 lb_vip_t::plen

The VIP prefix length.

In case of IPv4, plen = 96 + ip4_plen.

Definition at line 190 of file lb.h.

ip46_address_t lb_vip_t::prefix

A Virtual IP represents a given service delivered by a set of application servers.

It can be a single address or a prefix. IPv4 prefixes are encoded using IPv4-in-IPv6 embedded address (i.e. ::/96 prefix).

Definition at line 184 of file lb.h.

lb_vip_type_t lb_vip_t::type

The type of traffic for this.

LB_TYPE_UNDEFINED if unknown.

Definition at line 196 of file lb.h.

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The documentation for this struct was generated from the following file:

• src/plugins/lb/lb.h