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Data Structures
struct	lb_as_t
	Each VIP is configured with a set of application server. More...

struct	lb_new_flow_entry_t

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

struct	lb_per_cpu_t

struct	lb_main_t

Macros
#define	LB_DEFAULT_PER_CPU_STICKY_BUCKETS 1 << 10
	lb-plugin implements a MagLev-like load balancer. More...

#define	LB_DEFAULT_FLOW_TIMEOUT 40

#define	LB_AS_FLAGS_USED 0x1

#define	lb_foreach_vip_counter

#define	LB_VIP_FLAGS_USED 0x1

#define	lb_vip_is_ip4(vip) ((vip)->type == LB_VIP_TYPE_IP4_GRE6 \|\| (vip)->type == LB_VIP_TYPE_IP4_GRE4)

#define	lb_vip_is_gre4(vip) ((vip)->type == LB_VIP_TYPE_IP6_GRE4 \|\| (vip)->type == LB_VIP_TYPE_IP4_GRE4)

#define	lb_vip_get_by_index(index) (pool_is_free_index(lb_main.vips, index)?NULL:pool_elt_at_index(lb_main.vips, index))

Enumerations
enum	lb_next_t { LB_NEXT_DROP, LB_N_NEXT }

enum	lb_vip_counter_t { LB_N_VIP_COUNTERS }

enum	lb_vip_type_t { LB_VIP_TYPE_IP6_GRE6, LB_VIP_TYPE_IP6_GRE4, LB_VIP_TYPE_IP4_GRE6, LB_VIP_TYPE_IP4_GRE4, LB_VIP_N_TYPES }
	The load balancer supports IPv4 and IPv6 traffic and GRE4 and GRE6 encap. More...

Functions
int	lb_conf (ip4_address_t ip4_address, ip6_address_t ip6_address, u32 sticky_buckets, u32 flow_timeout)
	Fix global load-balancer parameters. More...

int	lb_vip_add (ip46_address_t prefix, u8 plen, lb_vip_type_t type, u32 new_length, u32 vip_index)

int	lb_vip_del (u32 vip_index)

int	lb_vip_find_index (ip46_address_t prefix, u8 plen, u32 vip_index)

int	lb_vip_add_ass (u32 vip_index, ip46_address_t *addresses, u32 n)

int	lb_vip_del_ass (u32 vip_index, ip46_address_t *addresses, u32 n)

u32	lb_hash_time_now (vlib_main_t *vm)

void	lb_garbage_collection ()

Variables
format_function_t	format_lb_as

format_function_t	format_lb_vip_type

unformat_function_t	unformat_lb_vip_type

format_function_t	format_lb_vip

format_function_t	format_lb_vip_detailed

lb_main_t	lb_main

vlib_node_registration_t	lb6_node

vlib_node_registration_t	lb4_node

format_function_t	format_lb_main

Macro Definition Documentation

#define LB_AS_FLAGS_USED 0x1

Definition at line 82 of file lb.h.

#define LB_DEFAULT_FLOW_TIMEOUT 40

Definition at line 44 of file lb.h.

#define LB_DEFAULT_PER_CPU_STICKY_BUCKETS 1 << 10

lb-plugin implements a MagLev-like load balancer.

http://research.google.com/pubs/pub44824.html

It hasn't been tested for interoperability with the original MagLev but intends to provide similar functionality. The load-balancer receives traffic destined to VIP (Virtual IP) addresses from one or multiple(ECMP) routers. The load-balancer tunnels the traffic toward many application servers ensuring session stickyness (i.e. that a single sessions is tunneled towards a single application server).

Definition at line 43 of file lb.h.

#define lb_foreach_vip_counter

Value:

_(NEXT_PACKET, "packet from existing sessions", 0) \
 _(FIRST_PACKET, "first session packet", 1) \
 _(UNTRACKED_PACKET, "untracked packet", 2) \
 _(NO_SERVER, "no server configured", 3)

Definition at line 118 of file lb.h.

#define LB_VIP_FLAGS_USED 0x1

Definition at line 206 of file lb.h.

#define lb_vip_get_by_index ( index ) (pool_is_free_index(lb_main.vips, index)?NULL:pool_elt_at_index(lb_main.vips, index))

Definition at line 322 of file lb.h.

#define lb_vip_is_gre4 ( vip ) ((vip)->type == LB_VIP_TYPE_IP6_GRE4 || (vip)->type == LB_VIP_TYPE_IP4_GRE4)

Definition at line 216 of file lb.h.

#define lb_vip_is_ip4 ( vip ) ((vip)->type == LB_VIP_TYPE_IP4_GRE6 || (vip)->type == LB_VIP_TYPE_IP4_GRE4)

Definition at line 215 of file lb.h.

Enumeration Type Documentation

enum lb_next_t

Enumerator
LB_NEXT_DROP
LB_N_NEXT

Definition at line 46 of file lb.h.

enum lb_vip_counter_t

Enumerator
LB_N_VIP_COUNTERS

Definition at line 124 of file lb.h.

enum lb_vip_type_t

The load balancer supports IPv4 and IPv6 traffic and GRE4 and GRE6 encap.

Enumerator
LB_VIP_TYPE_IP6_GRE6
LB_VIP_TYPE_IP6_GRE4
LB_VIP_TYPE_IP4_GRE6
LB_VIP_TYPE_IP4_GRE4
LB_VIP_N_TYPES

Definition at line 135 of file lb.h.

Function Documentation

int lb_conf	(	ip4_address_t *	ip4_address,
		ip6_address_t *	ip6_address,
		u32	sticky_buckets,
		u32	flow_timeout
	)

Fix global load-balancer parameters.

Parameters

ip4_address	IPv4 source address used for encapsulated traffic
ip6_address	IPv6 source address used for encapsulated traffic

Returns: 0 on success. VNET_LB_ERR_XXX on error

Definition at line 363 of file lb.c.

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