lb.h File Reference

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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_encap_args_t
struct	lb_vip_t
	Load balancing service is provided per VIP. More...
struct	lb_snat4_key_t
struct	lb_snat6_key_t
struct	lb_snat_mapping_t
struct	lb_per_cpu_t
struct	lb_main_t
struct	lb_vip_add_args_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_MAPPING_BUCKETS   1024
#define	LB_MAPPING_MEMORY_SIZE   64<<20
#define	foreach_lb_nat_in2out_error
#define	LB_AS_FLAGS_USED   0x1
#define	lb_foreach_vip_counter
#define	LB_VIP_FLAGS_USED   0x1
#define	lb_vip_is_ip4(vip)
#define	lb_vip_is_gre4(vip)
#define	lb_vip_is_gre6(vip)
#define	lb_encap_is_ip4(vip)
#define	foreach_lb_nat_protocol
#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_nat4_in2out_next_t { LB_NAT4_IN2OUT_NEXT_DROP, LB_NAT4_IN2OUT_NEXT_LOOKUP, LB_NAT4_IN2OUT_N_NEXT }
enum	LB_nat6_in2out_next_t { LB_NAT6_IN2OUT_NEXT_DROP, LB_NAT6_IN2OUT_NEXT_LOOKUP, LB_NAT6_IN2OUT_N_NEXT }
enum	lb_nat_in2out_error_t { LB_NAT_IN2OUT_N_ERROR }
enum	lb_svr_type_t { LB_SRV_TYPE_CLUSTERIP, LB_SRV_TYPE_NODEPORT, LB_SRV_N_TYPES }
	lb for kube-proxy supports three types of service More...
enum	lb4_nodeport_next_t { LB4_NODEPORT_NEXT_IP4_NAT4, LB4_NODEPORT_NEXT_DROP, LB4_NODEPORT_N_NEXT }
enum	lb6_nodeport_next_t { LB6_NODEPORT_NEXT_IP6_NAT6, LB6_NODEPORT_NEXT_DROP, LB6_NODEPORT_N_NEXT }
enum	lb_vip_counter_t { LB_N_VIP_COUNTERS }
enum	lb_encap_type_t {   LB_ENCAP_TYPE_GRE4, LB_ENCAP_TYPE_GRE6, LB_ENCAP_TYPE_L3DSR, LB_ENCAP_TYPE_NAT4,   LB_ENCAP_TYPE_NAT6, LB_ENCAP_N_TYPES }
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_TYPE_IP4_L3DSR, LB_VIP_TYPE_IP4_NAT4, LB_VIP_TYPE_IP6_NAT6, LB_VIP_N_TYPES }
	The load balancer supports IPv4 and IPv6 traffic and GRE4, GRE6, L3DSR and NAT4, NAT6 encap. More...
enum	lb_nat_protocol_t { foreach_lb_nat_protocol }

Functions
static bool	lb_vip_is_l3dsr (const lb_vip_t *vip)
static bool	lb_vip_is_nat4 (const lb_vip_t *vip)
static bool	lb_vip_is_nat6 (const lb_vip_t *vip)
static u32	lb_ip_proto_to_nat_proto (u8 ip_proto)
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 (lb_vip_add_args_t args, 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 ()
int	lb_nat4_interface_add_del (u32 sw_if_index, int is_del)
int	lb_nat6_interface_add_del (u32 sw_if_index, int is_del)

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	lb4_node
vlib_node_registration_t	lb6_node
vlib_node_registration_t	lb4_nodeport_node
	(constructor) VLIB_REGISTER_NODE (lb4_nodeport_node) More...
vlib_node_registration_t	lb6_nodeport_node
	(constructor) VLIB_REGISTER_NODE (lb6_nodeport_node) More...
vlib_node_registration_t	lb_nat4_in2out_node
	(constructor) VLIB_REGISTER_NODE (lb_nat4_in2out_node) More...
vlib_node_registration_t	lb_nat6_in2out_node
	(constructor) VLIB_REGISTER_NODE (lb_nat6_in2out_node) More...
format_function_t	format_lb_main

Macro Definition Documentation

#define foreach_lb_nat_in2out_error

Value:

_(UNSUPPORTED_PROTOCOL, "Unsupported protocol")         \
_(IN2OUT_PACKETS, "Good in2out packets processed")      \
_(NO_TRANSLATION, "No translation")

Definition at line 67 of file lb.h.

#define foreach_lb_nat_protocol

Value:

_(UDP, 0, udp, "udp")       \
  _(TCP, 1, tcp, "tcp")

Definition at line 339 of file lb.h.

#define LB_AS_FLAGS_USED   0x1

Definition at line 131 of file lb.h.

#define LB_DEFAULT_FLOW_TIMEOUT   40

Definition at line 46 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 45 of file lb.h.

#define lb_encap_is_ip4

(

vip

)

Value:

((vip)->type == LB_VIP_TYPE_IP6_GRE4 \
                             || (vip)->type == LB_VIP_TYPE_IP4_GRE4 \
                             || (vip)->type == LB_VIP_TYPE_IP4_L3DSR \
                             || (vip)->type == LB_VIP_TYPE_IP4_NAT4 )

Definition at line 315 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 167 of file lb.h.

#define LB_MAPPING_BUCKETS   1024

Definition at line 47 of file lb.h.

#define LB_MAPPING_MEMORY_SIZE   64<<20

Definition at line 48 of file lb.h.

#define LB_VIP_FLAGS_USED   0x1

Definition at line 295 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 542 of file lb.h.

#define lb_vip_is_gre4

(

vip

)

Value:

((vip)->type == LB_VIP_TYPE_IP6_GRE4 \
                             || (vip)->type == LB_VIP_TYPE_IP4_GRE4)

Definition at line 309 of file lb.h.

#define lb_vip_is_gre6

(

vip

)

Value:

((vip)->type == LB_VIP_TYPE_IP6_GRE6 \
                             || (vip)->type == LB_VIP_TYPE_IP4_GRE6)

Definition at line 312 of file lb.h.

#define lb_vip_is_ip4

(

vip

)

Value:

((vip)->type == LB_VIP_TYPE_IP4_GRE6 \
                            || (vip)->type == LB_VIP_TYPE_IP4_GRE4 \
                            || (vip)->type == LB_VIP_TYPE_IP4_L3DSR \
                            || (vip)->type == LB_VIP_TYPE_IP4_NAT4 )

Definition at line 304 of file lb.h.

Enumeration Type Documentation

enum lb4_nodeport_next_t

Enumerator
LB4_NODEPORT_NEXT_IP4_NAT4
LB4_NODEPORT_NEXT_DROP
LB4_NODEPORT_N_NEXT

Definition at line 88 of file lb.h.

enum lb6_nodeport_next_t

Enumerator
LB6_NODEPORT_NEXT_IP6_NAT6
LB6_NODEPORT_NEXT_DROP
LB6_NODEPORT_N_NEXT

Definition at line 94 of file lb.h.

enum lb_encap_type_t

Enumerator
LB_ENCAP_TYPE_GRE4
LB_ENCAP_TYPE_GRE6
LB_ENCAP_TYPE_L3DSR
LB_ENCAP_TYPE_NAT4
LB_ENCAP_TYPE_NAT6
LB_ENCAP_N_TYPES

Definition at line 180 of file lb.h.

enum LB_nat4_in2out_next_t

Enumerator
LB_NAT4_IN2OUT_NEXT_DROP
LB_NAT4_IN2OUT_NEXT_LOOKUP
LB_NAT4_IN2OUT_N_NEXT

Definition at line 55 of file lb.h.

enum LB_nat6_in2out_next_t

Enumerator
LB_NAT6_IN2OUT_NEXT_DROP
LB_NAT6_IN2OUT_NEXT_LOOKUP
LB_NAT6_IN2OUT_N_NEXT

Definition at line 61 of file lb.h.

enum lb_nat_in2out_error_t

Enumerator
LB_NAT_IN2OUT_N_ERROR

Definition at line 72 of file lb.h.

enum lb_nat_protocol_t

Enumerator
foreach_lb_nat_protocol

Definition at line 343 of file lb.h.

enum lb_next_t

Enumerator
LB_NEXT_DROP
LB_N_NEXT

Definition at line 50 of file lb.h.

enum lb_svr_type_t

lb for kube-proxy supports three types of service

Enumerator
LB_SRV_TYPE_CLUSTERIP
LB_SRV_TYPE_NODEPORT
LB_SRV_N_TYPES

Definition at line 82 of file lb.h.

enum lb_vip_counter_t

Enumerator
LB_N_VIP_COUNTERS

Definition at line 173 of file lb.h.

enum lb_vip_type_t

The load balancer supports IPv4 and IPv6 traffic and GRE4, GRE6, L3DSR and NAT4, NAT6 encap.

Enumerator
LB_VIP_TYPE_IP6_GRE6
LB_VIP_TYPE_IP6_GRE4
LB_VIP_TYPE_IP4_GRE6
LB_VIP_TYPE_IP4_GRE4
LB_VIP_TYPE_IP4_L3DSR
LB_VIP_TYPE_IP4_NAT4
LB_VIP_TYPE_IP6_NAT6
LB_VIP_N_TYPES

Definition at line 193 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 464 of file lb.c.

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void lb_garbage_collection

(

)

Definition at line 335 of file lb.c.

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u32 lb_hash_time_now

(

vlib_main_t *

vm

)

Definition at line 70 of file lb.c.

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static u32 lb_ip_proto_to_nat_proto ( u8  ip_proto )

inlinestatic

Definition at line 350 of file lb.h.

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int lb_nat4_interface_add_del	(	u32	sw_if_index,
		int	is_del
	)

Definition at line 1045 of file lb.c.

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int lb_nat6_interface_add_del	(	u32	sw_if_index,
		int	is_del
	)

Definition at line 1061 of file lb.c.

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int lb_vip_add	(	lb_vip_add_args_t	args,
		u32 *	vip_index
	)

Definition at line 823 of file lb.c.

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

Definition at line 527 of file lb.c.

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int lb_vip_del

(

u32

vip_index

)

Definition at line 936 of file lb.c.

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

Definition at line 755 of file lb.c.

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

Definition at line 500 of file lb.c.

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static bool lb_vip_is_l3dsr ( const lb_vip_t *  vip )

inlinestatic

Definition at line 321 of file lb.h.

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static bool lb_vip_is_nat4 ( const lb_vip_t *  vip )

inlinestatic

Definition at line 326 of file lb.h.

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static bool lb_vip_is_nat6 ( const lb_vip_t *  vip )

inlinestatic

Definition at line 331 of file lb.h.

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Variable Documentation

format_function_t format_lb_as

Definition at line 161 of file lb.h.

format_function_t format_lb_main

Definition at line 554 of file lb.h.

format_function_t format_lb_vip

Definition at line 336 of file lb.h.

format_function_t format_lb_vip_detailed

Definition at line 337 of file lb.h.

format_function_t format_lb_vip_type

Definition at line 204 of file lb.h.

vlib_node_registration_t lb4_node

vlib_node_registration_t lb4_nodeport_node

(constructor) VLIB_REGISTER_NODE (lb4_nodeport_node)

Definition at line 1053 of file node.c.

vlib_node_registration_t lb6_node

vlib_node_registration_t lb6_nodeport_node

(constructor) VLIB_REGISTER_NODE (lb6_nodeport_node)

Definition at line 1069 of file node.c.

lb_main_t lb_main

Definition at line 28 of file lb.c.

vlib_node_registration_t lb_nat4_in2out_node

(constructor) VLIB_REGISTER_NODE (lb_nat4_in2out_node)

Definition at line 1092 of file node.c.

vlib_node_registration_t lb_nat6_in2out_node

(constructor) VLIB_REGISTER_NODE (lb_nat6_in2out_node)

Definition at line 1115 of file node.c.

unformat_function_t unformat_lb_vip_type

Definition at line 205 of file lb.h.