load_balance.c File Reference

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Data Structures
struct	load_balance_trace_t_

Macros
#define	LB_DBG(_lb, _fmt, _args...)

Typedefs
typedef struct load_balance_trace_t_	load_balance_trace_t

Functions
f64	load_balance_get_multipath_tolerance (void)
static index_t	load_balance_get_index (const load_balance_t *lb)
static dpo_id_t *	load_balance_get_buckets (load_balance_t *lb)
static load_balance_t *	load_balance_alloc_i (void)
static u8 *	load_balance_format (index_t lbi, load_balance_format_flags_t flags, u32 indent, u8 *s)
u8 *	format_load_balance (u8 *s, va_list *args)
static u8 *	format_load_balance_dpo (u8 *s, va_list *args)
flow_hash_config_t	load_balance_get_default_flow_hash (dpo_proto_t lb_proto)
static load_balance_t *	load_balance_create_i (u32 num_buckets, dpo_proto_t lb_proto, flow_hash_config_t fhc)
index_t	load_balance_create (u32 n_buckets, dpo_proto_t lb_proto, flow_hash_config_t fhc)
static void	load_balance_set_bucket_i (load_balance_t *lb, u32 bucket, dpo_id_t *buckets, const dpo_id_t *next)
void	load_balance_set_bucket (index_t lbi, u32 bucket, const dpo_id_t *next)
int	load_balance_is_drop (const dpo_id_t *dpo)
u16	load_balance_n_buckets (index_t lbi)
void	load_balance_set_fib_entry_flags (index_t lbi, fib_entry_flag_t flags)
void	load_balance_set_urpf (index_t lbi, index_t urpf)
index_t	load_balance_get_urpf (index_t lbi)
const dpo_id_t *	load_balance_get_bucket (index_t lbi, u32 bucket)
static int	next_hop_sort_by_weight (const load_balance_path_t *n1, const load_balance_path_t *n2)
u32	ip_multipath_normalize_next_hops (const load_balance_path_t *raw_next_hops, load_balance_path_t **normalized_next_hops, u32 *sum_weight_in, f64 multipath_next_hop_error_tolerance)
static load_balance_path_t *	load_balance_multipath_next_hop_fixup (const load_balance_path_t *nhs, dpo_proto_t drop_proto)
static void	load_balance_fill_buckets_norm (load_balance_t *lb, load_balance_path_t *nhs, dpo_id_t *buckets, u32 n_buckets)
static void	load_balance_fill_buckets_sticky (load_balance_t *lb, load_balance_path_t *nhs, dpo_id_t *buckets, u32 n_buckets)
static void	load_balance_fill_buckets (load_balance_t *lb, load_balance_path_t *nhs, dpo_id_t *buckets, u32 n_buckets, load_balance_flags_t flags)
static void	load_balance_set_n_buckets (load_balance_t *lb, u32 n_buckets)
void	load_balance_multipath_update (const dpo_id_t *dpo, const load_balance_path_t *raw_nhs, load_balance_flags_t flags)
static void	load_balance_lock (dpo_id_t *dpo)
static void	load_balance_destroy (load_balance_t *lb)
static void	load_balance_unlock (dpo_id_t *dpo)
static void	load_balance_mem_show (void)
void	load_balance_module_init (void)
static clib_error_t *	load_balance_show (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
static u32	ip_flow_hash (void *data)
static u64	mac_to_u64 (u8 *m)
static u32	l2_flow_hash (vlib_buffer_t *b0)
static uword	load_balance_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int is_l2)
static uword	l2_load_balance (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
static u8 *	format_l2_load_balance_trace (u8 *s, va_list *args)
static uword	nsh_load_balance (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
static u8 *	format_nsh_load_balance_trace (u8 *s, va_list *args)
static u8 *	format_bier_load_balance_trace (u8 *s, va_list *args)
static uword	bier_load_balance (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)

Variables
const f64	multipath_next_hop_error_tolerance = 0.1
static const char *	load_balance_attr_names [] = LOAD_BALANCE_ATTR_NAMES
vlib_log_class_t	load_balance_logger
	the logger More...
load_balance_t *	load_balance_pool
	Pool of all DPOs. More...
load_balance_main_t	load_balance_main
	The one instance of load-balance main. More...
static const dpo_vft_t	lb_vft
static const char *const	load_balance_ip4_nodes []
	The per-protocol VLIB graph nodes that are assigned to a load-balance object. More...
static const char *const	load_balance_ip6_nodes []
static const char *const	load_balance_mpls_nodes []
static const char *const	load_balance_l2_nodes []
static const char *const	load_balance_nsh_nodes []
static const char *const	load_balance_bier_nodes []
static const char *const *const	load_balance_nodes [DPO_PROTO_NUM]
static vlib_cli_command_t	load_balance_show_command
	(constructor) VLIB_CLI_COMMAND (load_balance_show_command) More...
vlib_node_registration_t	l2_load_balance_node
	(constructor) VLIB_REGISTER_NODE (l2_load_balance_node) More...
vlib_node_registration_t	nsh_load_balance_node
	(constructor) VLIB_REGISTER_NODE (nsh_load_balance_node) More...
vlib_node_registration_t	bier_load_balance_node
	(constructor) VLIB_REGISTER_NODE (bier_load_balance_node) More...

Macro Definition Documentation

LB_DBG

#define LB_DBG	(		_lb,
			_fmt,
			_args...
	)

Value:

{                                                                       \
    vlib_log_debug(load_balance_logger,                                 \
                   "lb:[%U]:" _fmt,                                     \
                   format_load_balance(), load_balance_get_index(_lb),    \
                   LOAD_BALANCE_FORMAT_NONE,                            \
                   ##_args);                                            \
}

Definition at line 39 of file load_balance.c.

Typedef Documentation

load_balance_trace_t

typedef struct load_balance_trace_t_ load_balance_trace_t

Function Documentation

bier_load_balance()

static uword bier_load_balance ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 1283 of file load_balance.c.

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format_bier_load_balance_trace()

static u8* format_bier_load_balance_trace ( u8 *  s, va_list *  args  )

static

Definition at line 1272 of file load_balance.c.

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format_l2_load_balance_trace()

static u8* format_l2_load_balance_trace ( u8 *  s, va_list *  args  )

static

Definition at line 1156 of file load_balance.c.

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format_load_balance()

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

Definition at line 175 of file load_balance.c.

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format_load_balance_dpo()

static u8* format_load_balance_dpo ( u8 *  s, va_list *  args  )

static

Definition at line 184 of file load_balance.c.

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format_nsh_load_balance_trace()

static u8* format_nsh_load_balance_trace ( u8 *  s, va_list *  args  )

static

Definition at line 1246 of file load_balance.c.

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ip_flow_hash()

static u32 ip_flow_hash ( void *  data )

inlinestatic

Definition at line 1026 of file load_balance.c.

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ip_multipath_normalize_next_hops()

u32 ip_multipath_normalize_next_hops	(	const load_balance_path_t *	raw_next_hops,
		load_balance_path_t **	normalized_next_hops,
		u32 *	sum_weight_in,
		f64	multipath_next_hop_error_tolerance
	)

Definition at line 360 of file load_balance.c.

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l2_flow_hash()

static u32 l2_flow_hash ( vlib_buffer_t *  b0 )

inlinestatic

Definition at line 1043 of file load_balance.c.

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l2_load_balance()

static uword l2_load_balance ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 1148 of file load_balance.c.

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load_balance_alloc_i()

static load_balance_t* load_balance_alloc_i ( void  )

static

Definition at line 93 of file load_balance.c.

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load_balance_create()

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

Definition at line 239 of file load_balance.c.

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load_balance_create_i()

static load_balance_t* load_balance_create_i ( u32  num_buckets, dpo_proto_t  lb_proto, flow_hash_config_t  fhc  )

static

Definition at line 214 of file load_balance.c.

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load_balance_destroy()

static void load_balance_destroy ( load_balance_t *  lb )

static

Definition at line 847 of file load_balance.c.

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load_balance_fill_buckets()

static void load_balance_fill_buckets ( load_balance_t *  lb, load_balance_path_t *  nhs, dpo_id_t *  buckets, u32  n_buckets, load_balance_flags_t  flags  )

static

Definition at line 577 of file load_balance.c.

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load_balance_fill_buckets_norm()

static void load_balance_fill_buckets_norm ( load_balance_t *  lb, load_balance_path_t *  nhs, dpo_id_t *  buckets, u32  n_buckets  )

static

Definition at line 506 of file load_balance.c.

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load_balance_fill_buckets_sticky()

static void load_balance_fill_buckets_sticky ( load_balance_t *  lb, load_balance_path_t *  nhs, dpo_id_t *  buckets, u32  n_buckets  )

static

Definition at line 530 of file load_balance.c.

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load_balance_format()

static u8* load_balance_format ( index_t  lbi, load_balance_format_flags_t  flags, u32  indent, u8 *  s  )

static

Definition at line 115 of file load_balance.c.

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load_balance_get_bucket()

const dpo_id_t* load_balance_get_bucket	(	index_t	lbi,
		u32	bucket
	)

Definition at line 339 of file load_balance.c.

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load_balance_get_buckets()

static dpo_id_t* load_balance_get_buckets ( load_balance_t *  lb )

inlinestatic

Definition at line 80 of file load_balance.c.

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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 193 of file load_balance.c.

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load_balance_get_index()

static index_t load_balance_get_index ( const load_balance_t *  lb )

inlinestatic

Definition at line 74 of file load_balance.c.

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load_balance_get_multipath_tolerance()

f64 load_balance_get_multipath_tolerance

(

void

)

Definition at line 68 of file load_balance.c.

load_balance_get_urpf()

index_t load_balance_get_urpf

(

index_t

lbi

)

Definition at line 329 of file load_balance.c.

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load_balance_inline()

static uword load_balance_inline ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame, int  is_l2  )

inlinestatic

Definition at line 1075 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 272 of file load_balance.c.

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load_balance_lock()

static void load_balance_lock ( dpo_id_t *  dpo )

static

Definition at line 837 of file load_balance.c.

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load_balance_mem_show()

static void load_balance_mem_show ( void  )

static

Definition at line 887 of file load_balance.c.

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load_balance_module_init()

void load_balance_module_init

(

void

)

Definition at line 955 of file load_balance.c.

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load_balance_multipath_next_hop_fixup()

static load_balance_path_t* load_balance_multipath_next_hop_fixup ( const load_balance_path_t *  nhs, dpo_proto_t  drop_proto  )

static

Definition at line 480 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_nhs,
		load_balance_flags_t	flags
	)

Definition at line 602 of file load_balance.c.

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load_balance_n_buckets()

u16 load_balance_n_buckets

(

index_t

lbi

)

Definition at line 289 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 256 of file load_balance.c.

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load_balance_set_bucket_i()

static void load_balance_set_bucket_i ( load_balance_t *  lb, u32  bucket, dpo_id_t *  buckets, const dpo_id_t *  next  )

inlinestatic

Definition at line 247 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 299 of file load_balance.c.

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load_balance_set_n_buckets()

static void load_balance_set_n_buckets ( load_balance_t *  lb, u32  n_buckets  )

inlinestatic

Definition at line 594 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 310 of file load_balance.c.

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load_balance_show()

static clib_error_t* load_balance_show ( vlib_main_t *  vm, unformat_input_t *  input, vlib_cli_command_t *  cmd  )

static

Definition at line 977 of file load_balance.c.

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load_balance_unlock()

static void load_balance_unlock ( dpo_id_t *  dpo )

static

Definition at line 872 of file load_balance.c.

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mac_to_u64()

static u64 mac_to_u64 ( u8 *  m )

inlinestatic

Definition at line 1037 of file load_balance.c.

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next_hop_sort_by_weight()

static int next_hop_sort_by_weight ( const load_balance_path_t *  n1, const load_balance_path_t *  n2  )

static

Definition at line 350 of file load_balance.c.

nsh_load_balance()

static uword nsh_load_balance ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 1182 of file load_balance.c.

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Variable Documentation

bier_load_balance_node

vlib_node_registration_t bier_load_balance_node

Initial value:

= {
  .function = bier_load_balance,
  .name = "bier-load-balance",
  .vector_size = sizeof (u32),

  .format_trace = format_bier_load_balance_trace,
  .sibling_of = "mpls-load-balance",
}

(constructor) VLIB_REGISTER_NODE (bier_load_balance_node)

Definition at line 1293 of file load_balance.c.

l2_load_balance_node

vlib_node_registration_t l2_load_balance_node

Initial value:

= {
  .function = l2_load_balance,
  .name = "l2-load-balance",
  .vector_size = sizeof (u32),

  .format_trace = format_l2_load_balance_trace,
  .n_next_nodes = 1,
  .next_nodes = {
      [0] = "error-drop",
  },
}

(constructor) VLIB_REGISTER_NODE (l2_load_balance_node)

Definition at line 1169 of file load_balance.c.

lb_vft

const dpo_vft_t lb_vft

static

Initial value:

= {
    .dv_lock = load_balance_lock,
    .dv_unlock = load_balance_unlock,
    .dv_format = format_load_balance_dpo,
    .dv_mem_show = load_balance_mem_show,
}

Definition at line 896 of file load_balance.c.

load_balance_attr_names

const char* load_balance_attr_names[] = LOAD_BALANCE_ATTR_NAMES

static

Definition at line 32 of file load_balance.c.

load_balance_bier_nodes

const char* const load_balance_bier_nodes[]

static

Initial value:

=
{
    "bier-load-balance",
    NULL,
}

Definition at line 939 of file load_balance.c.

load_balance_ip4_nodes

const char* const load_balance_ip4_nodes[]

static

Initial value:

=
{
    "ip4-load-balance",
    NULL,
}

The per-protocol VLIB graph nodes that are assigned to a load-balance object.

this means that these graph nodes are ones from which a load-balance is the parent object in the DPO-graph.

We do not list all the load-balance nodes, such as the *-lookup. instead we are relying on the correct use of the .sibling_of field when setting up these sibling nodes.

Definition at line 914 of file load_balance.c.

load_balance_ip6_nodes

const char* const load_balance_ip6_nodes[]

static

Initial value:

=
{
    "ip6-load-balance",
    NULL,
}

Definition at line 919 of file load_balance.c.

load_balance_l2_nodes

const char* const load_balance_l2_nodes[]

static

Initial value:

=
{
    "l2-load-balance",
    NULL,
}

Definition at line 929 of file load_balance.c.

load_balance_logger

vlib_log_class_t load_balance_logger

the logger

Definition at line 37 of file load_balance.c.

load_balance_main

load_balance_main_t load_balance_main

Initial value:

= {
    .lbm_to_counters = {
        .name = "route-to",
        .stat_segment_name = "/net/route/to",
    },
    .lbm_via_counters = {
        .name = "route-via",
        .stat_segment_name = "/net/route/via",
    }
}

The one instance of load-balance main.

Definition at line 56 of file load_balance.c.

load_balance_mpls_nodes

const char* const load_balance_mpls_nodes[]

static

Initial value:

=
{
    "mpls-load-balance",
    NULL,
}

Definition at line 924 of file load_balance.c.

load_balance_nodes

const char* const* const load_balance_nodes[DPO_PROTO_NUM]

static

Initial value:

=
{
    [DPO_PROTO_IP4]  = load_balance_ip4_nodes,
    [DPO_PROTO_IP6]  = load_balance_ip6_nodes,
    [DPO_PROTO_MPLS] = load_balance_mpls_nodes,
    [DPO_PROTO_ETHERNET] = load_balance_l2_nodes,
    [DPO_PROTO_NSH] = load_balance_nsh_nodes,
    [DPO_PROTO_BIER] = load_balance_bier_nodes,
}

Definition at line 944 of file load_balance.c.

load_balance_nsh_nodes

const char* const load_balance_nsh_nodes[]

static

Initial value:

=
{
    "nsh-load-balance",
    NULL
}

Definition at line 934 of file load_balance.c.

load_balance_pool

load_balance_t* load_balance_pool

Pool of all DPOs.

The encapsulation breakages are for fast DP access.

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

Definition at line 51 of file load_balance.c.

load_balance_show_command

vlib_cli_command_t load_balance_show_command

static

Initial value:

= {
    .path = "show load-balance",
    .short_help = "show load-balance [<index>]",
    .function = load_balance_show,
}

(constructor) VLIB_CLI_COMMAND (load_balance_show_command)

Definition at line 1018 of file load_balance.c.

multipath_next_hop_error_tolerance

const f64 multipath_next_hop_error_tolerance = 0.1

Definition at line 30 of file load_balance.c.

nsh_load_balance_node

vlib_node_registration_t nsh_load_balance_node

Initial value:

= {
  .function = nsh_load_balance,
  .name = "nsh-load-balance",
  .vector_size = sizeof (u32),

  .format_trace = format_nsh_load_balance_trace,
  .n_next_nodes = 1,
  .next_nodes = {
      [0] = "error-drop",
  },
}

(constructor) VLIB_REGISTER_NODE (nsh_load_balance_node)

Definition at line 1259 of file load_balance.c.