load_balance.h File Reference

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Data Structures
struct	load_balance_main_t_
	The load-balance object represents an ECMP choice. More...
struct	load_balance_path_t_
	One path from an [EU]CMP set that the client wants to add to a load-balance object. More...
struct	load_balance_t_
	The FIB DPO provieds;. More...

Macros
#define	LB_NUM_INLINE_BUCKETS   4
	The number of buckets that a load-balance object can have and still fit in one cache-line. More...
#define	LOAD_BALANCE_ATTR_NAMES
#define	FOR_EACH_LOAD_BALANCE_ATTR(_attr)   for (_attr = 0; _attr <= LOAD_BALANCE_ATTR_STICKY; _attr++)
#define	LB_HAS_INLINE_BUCKETS(_lb)   ((_lb)->lb_n_buckets <= LB_NUM_INLINE_BUCKETS)

Typedefs
typedef struct load_balance_main_t_	load_balance_main_t
	The load-balance object represents an ECMP choice. More...
typedef struct load_balance_path_t_	load_balance_path_t
	One path from an [EU]CMP set that the client wants to add to a load-balance object. More...
typedef enum load_balance_attr_t_	load_balance_attr_t
	Flags controlling load-balance creation and modification. More...
typedef enum load_balance_flags_t_	load_balance_flags_t
typedef struct load_balance_t_	load_balance_t
	The FIB DPO provieds;. More...
typedef enum load_balance_format_flags_t_	load_balance_format_flags_t
	Flags controlling load-balance formatting/display. More...

Enumerations
enum	load_balance_attr_t_ { LOAD_BALANCE_ATTR_USES_MAP = 0, LOAD_BALANCE_ATTR_STICKY = 1 }
	Flags controlling load-balance creation and modification. More...
enum	load_balance_flags_t_ { LOAD_BALANCE_FLAG_NONE = 0, LOAD_BALANCE_FLAG_USES_MAP = (1 << 0), LOAD_BALANCE_FLAG_STICKY = (1 << 1) }
enum	load_balance_format_flags_t_ { LOAD_BALANCE_FORMAT_NONE, LOAD_BALANCE_FORMAT_DETAIL = (1 << 0) }
	Flags controlling load-balance formatting/display. More...

Functions
	STATIC_ASSERT (sizeof(load_balance_t)<=CLIB_CACHE_LINE_BYTES, "A load_balance object size exceeds one cacheline")
index_t	load_balance_create (u32 num_buckets, dpo_proto_t lb_proto, flow_hash_config_t fhc)
flow_hash_config_t	load_balance_get_default_flow_hash (dpo_proto_t lb_proto)
void	load_balance_multipath_update (const dpo_id_t *dpo, const load_balance_path_t *raw_next_hops, load_balance_flags_t flags)
void	load_balance_set_bucket (index_t lbi, u32 bucket, const dpo_id_t *next)
void	load_balance_set_urpf (index_t lbi, index_t urpf)
void	load_balance_set_fib_entry_flags (index_t lbi, fib_entry_flag_t flags)
index_t	load_balance_get_urpf (index_t lbi)
u8 *	format_load_balance (u8 *s, va_list *args)
const dpo_id_t *	load_balance_get_bucket (index_t lbi, u32 bucket)
int	load_balance_is_drop (const dpo_id_t *dpo)
u16	load_balance_n_buckets (index_t lbi)
f64	load_balance_get_multipath_tolerance (void)
static load_balance_t *	load_balance_get (index_t lbi)
static const dpo_id_t *	load_balance_get_bucket_i (const load_balance_t *lb, u32 bucket)
void	load_balance_module_init (void)

Variables
load_balance_main_t	load_balance_main
	The one instance of load-balance main. More...
load_balance_t *	load_balance_pool
	The encapsulation breakages are for fast DP access. More...

Macro Definition Documentation

FOR_EACH_LOAD_BALANCE_ATTR

#define FOR_EACH_LOAD_BALANCE_ATTR

(

_attr

)

for (_attr = 0; _attr <= LOAD_BALANCE_ATTR_STICKY; _attr++)

Definition at line 92 of file load_balance.h.

LB_HAS_INLINE_BUCKETS

#define LB_HAS_INLINE_BUCKETS

(

_lb

)

((_lb)->lb_n_buckets <= LB_NUM_INLINE_BUCKETS)

Definition at line 225 of file load_balance.h.

LB_NUM_INLINE_BUCKETS

#define LB_NUM_INLINE_BUCKETS   4

The number of buckets that a load-balance object can have and still fit in one cache-line.

Definition at line 56 of file load_balance.h.

LOAD_BALANCE_ATTR_NAMES

#define LOAD_BALANCE_ATTR_NAMES

Value:

{                  \
    [LOAD_BALANCE_ATTR_USES_MAP] = "uses-map",      \
    [LOAD_BALANCE_ATTR_STICKY] = "sticky",          \
}

Definition at line 87 of file load_balance.h.

Typedef Documentation

load_balance_attr_t

typedef enum load_balance_attr_t_ load_balance_attr_t

Flags controlling load-balance creation and modification.

load_balance_flags_t

typedef enum load_balance_flags_t_ load_balance_flags_t

load_balance_format_flags_t

typedef enum load_balance_format_flags_t_ load_balance_format_flags_t

Flags controlling load-balance formatting/display.

load_balance_main_t

typedef struct load_balance_main_t_ load_balance_main_t

The load-balance object represents an ECMP choice.

The buckets of a load balance object point to the sub-graph after the choice is made. THe load-balance object is also object type returned from a FIB table lookup. As such it needs to represent the case where there is only one coice. It may seem like overkill to use a load-balance object in this case, but the reason is for performance. If the load-balance object were not the result of the FIB lookup, then some other object would be. The case where there was ECMP this other object would need a load-balance as a parent and hence just add an unnecessary indirection.

It is also the object in the DP that represents a via-fib-entry in a recursive route. Load-balance main

load_balance_path_t

typedef struct load_balance_path_t_ load_balance_path_t

One path from an [EU]CMP set that the client wants to add to a load-balance object.

load_balance_t

typedef struct load_balance_t_ load_balance_t

The FIB DPO provieds;.

• load-balancing over the next DPOs in the chain/graph
• per-route counters

Enumeration Type Documentation

load_balance_attr_t_

enum load_balance_attr_t_

Flags controlling load-balance creation and modification.

Enumerator
LOAD_BALANCE_ATTR_USES_MAP
LOAD_BALANCE_ATTR_STICKY

Definition at line 82 of file load_balance.h.

load_balance_flags_t_

enum load_balance_flags_t_

Enumerator
LOAD_BALANCE_FLAG_NONE
LOAD_BALANCE_FLAG_USES_MAP
LOAD_BALANCE_FLAG_STICKY

Definition at line 95 of file load_balance.h.

load_balance_format_flags_t_

enum load_balance_format_flags_t_

Flags controlling load-balance formatting/display.

Enumerator
LOAD_BALANCE_FORMAT_NONE
LOAD_BALANCE_FORMAT_DETAIL

Definition at line 183 of file load_balance.h.

Function Documentation

format_load_balance()

u8* format_load_balance	(	u8 *	s,
		va_list *	args
	)

Definition at line 200 of file load_balance.c.

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load_balance_create()

index_t load_balance_create	(	u32	num_buckets,
		dpo_proto_t	lb_proto,
		flow_hash_config_t	fhc
	)

Definition at line 264 of file load_balance.c.

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load_balance_get()

static load_balance_t* load_balance_get ( index_t  lbi )

inlinestatic

Definition at line 220 of file load_balance.h.

load_balance_get_bucket()

const dpo_id_t* load_balance_get_bucket	(	index_t	lbi,
		u32	bucket
	)

Definition at line 364 of file load_balance.c.

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load_balance_get_bucket_i()

static const dpo_id_t* load_balance_get_bucket_i ( const load_balance_t *  lb, u32  bucket  )

inlinestatic

Definition at line 229 of file load_balance.h.

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load_balance_get_default_flow_hash()

flow_hash_config_t load_balance_get_default_flow_hash

(

dpo_proto_t

lb_proto

)

Definition at line 218 of file load_balance.c.

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load_balance_get_multipath_tolerance()

f64 load_balance_get_multipath_tolerance

(

void

)

Definition at line 69 of file load_balance.c.

load_balance_get_urpf()

index_t load_balance_get_urpf

(

index_t

lbi

)

Definition at line 354 of file load_balance.c.

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load_balance_is_drop()

int load_balance_is_drop

(

const dpo_id_t *

dpo

)

Definition at line 297 of file load_balance.c.

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load_balance_module_init()

void load_balance_module_init

(

void

)

Definition at line 980 of file load_balance.c.

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load_balance_multipath_update()

void load_balance_multipath_update	(	const dpo_id_t *	dpo,
		const load_balance_path_t *	raw_next_hops,
		load_balance_flags_t	flags
	)

Definition at line 627 of file load_balance.c.

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load_balance_n_buckets()

u16 load_balance_n_buckets

(

index_t

lbi

)

Definition at line 314 of file load_balance.c.

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load_balance_set_bucket()

void load_balance_set_bucket	(	index_t	lbi,
		u32	bucket,
		const dpo_id_t *	next
	)

Definition at line 281 of file load_balance.c.

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load_balance_set_fib_entry_flags()

void load_balance_set_fib_entry_flags	(	index_t	lbi,
		fib_entry_flag_t	flags
	)

Definition at line 324 of file load_balance.c.

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load_balance_set_urpf()

void load_balance_set_urpf	(	index_t	lbi,
		index_t	urpf
	)

Definition at line 335 of file load_balance.c.

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STATIC_ASSERT()

STATIC_ASSERT	(	sizeof(load_balance_t)<=	CLIB_CACHE_LINE_BYTES,
		"A load_balance object size exceeds one cacheline"
	)

Variable Documentation

load_balance_main

load_balance_main_t load_balance_main

The one instance of load-balance main.

Definition at line 57 of file load_balance.c.

load_balance_pool

load_balance_t* load_balance_pool

The encapsulation breakages are for fast DP access.

The encapsulation breakages are for fast DP access.

It's not static so the DP can have fast access

Definition at line 52 of file load_balance.c.