load_balance.c File Reference

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Data Structures
struct	load_balance_trace_t_

Macros
#define	LB_DBG(_p, _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)
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 (load_balance_t *lb, load_balance_path_t *nhs, dpo_id_t *buckets, u32 n_buckets)
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
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

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

Definition at line 44 of file load_balance.c.

Typedef Documentation

typedef struct load_balance_trace_t_ load_balance_trace_t

Function Documentation

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

static

Definition at line 1164 of file load_balance.c.

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

static

Definition at line 1153 of file load_balance.c.

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

static

Definition at line 1037 of file load_balance.c.

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

Definition at line 151 of file load_balance.c.

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

static

Definition at line 159 of file load_balance.c.

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

static

Definition at line 1127 of file load_balance.c.

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static u32 ip_flow_hash ( void *  data )

inlinestatic

Definition at line 907 of file load_balance.c.

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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 315 of file load_balance.c.

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static u32 l2_flow_hash ( vlib_buffer_t *  b0 )

inlinestatic

Definition at line 924 of file load_balance.c.

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

static

Definition at line 1029 of file load_balance.c.

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static load_balance_t* load_balance_alloc_i ( void  )

static

Definition at line 84 of file load_balance.c.

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

Definition at line 194 of file load_balance.c.

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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 169 of file load_balance.c.

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static void load_balance_destroy ( load_balance_t *  lb )

static

Definition at line 738 of file load_balance.c.

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

static

Definition at line 461 of file load_balance.c.

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

static

Definition at line 106 of file load_balance.c.

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const dpo_id_t* load_balance_get_bucket	(	index_t	lbi,
		u32	bucket
	)

Definition at line 294 of file load_balance.c.

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static dpo_id_t* load_balance_get_buckets ( load_balance_t *  lb )

inlinestatic

Definition at line 71 of file load_balance.c.

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static index_t load_balance_get_index ( const load_balance_t *  lb )

inlinestatic

Definition at line 65 of file load_balance.c.

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f64 load_balance_get_multipath_tolerance

(

void

)

Definition at line 59 of file load_balance.c.

index_t load_balance_get_urpf

(

index_t

lbi

)

Definition at line 284 of file load_balance.c.

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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 956 of file load_balance.c.

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int load_balance_is_drop

(

const dpo_id_t *

dpo

)

Definition at line 227 of file load_balance.c.

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static void load_balance_lock ( dpo_id_t *  dpo )

static

Definition at line 728 of file load_balance.c.

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static void load_balance_mem_show ( void  )

static

Definition at line 778 of file load_balance.c.

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void load_balance_module_init

(

void

)

Definition at line 846 of file load_balance.c.

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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 435 of file load_balance.c.

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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 494 of file load_balance.c.

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u16 load_balance_n_buckets

(

index_t

lbi

)

Definition at line 244 of file load_balance.c.

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

Definition at line 211 of file load_balance.c.

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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 202 of file load_balance.c.

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void load_balance_set_fib_entry_flags	(	index_t	lbi,
		fib_entry_flag_t	flags
	)

Definition at line 254 of file load_balance.c.

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static void load_balance_set_n_buckets ( load_balance_t *  lb, u32  n_buckets  )

inlinestatic

Definition at line 486 of file load_balance.c.

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void load_balance_set_urpf	(	index_t	lbi,
		index_t	urpf
	)

Definition at line 265 of file load_balance.c.

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

static

Definition at line 865 of file load_balance.c.

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static void load_balance_unlock ( dpo_id_t *  dpo )

static

Definition at line 763 of file load_balance.c.

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static u64 mac_to_u64 ( u8 *  m )

inlinestatic

Definition at line 918 of file load_balance.c.

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

static

Definition at line 305 of file load_balance.c.

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

static

Definition at line 1063 of file load_balance.c.

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Variable Documentation

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 1174 of file load_balance.c.

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 1050 of file load_balance.c.

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 787 of file load_balance.c.

const char* const load_balance_bier_nodes[]

static

Initial value:

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

Definition at line 830 of file load_balance.c.

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 805 of file load_balance.c.

const char* const load_balance_ip6_nodes[]

static

Initial value:

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

Definition at line 810 of file load_balance.c.

const char* const load_balance_l2_nodes[]

static

Initial value:

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

Definition at line 820 of file load_balance.c.

load_balance_main_t load_balance_main

The one instance of load-balance main.

Definition at line 56 of file load_balance.c.

const char* const load_balance_mpls_nodes[]

static

Initial value:

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

Definition at line 815 of file load_balance.c.

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 835 of file load_balance.c.

const char* const load_balance_nsh_nodes[]

static

Initial value:

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

Definition at line 825 of file load_balance.c.

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.

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 899 of file load_balance.c.

const f64 multipath_next_hop_error_tolerance = 0.1

Definition at line 29 of file load_balance.c.

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 1140 of file load_balance.c.