mpls_fib.c File Reference

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Macros
#define	MPLS_FLOW_HASH_DEFAULT   0
	FIXME. More...

Functions
static u32	mpls_fib_entry_mk_key (mpls_label_t label, mpls_eos_bit_t eos)
u32	mpls_fib_index_from_table_id (u32 table_id)
static u32	mpls_fib_create_with_table_id (u32 table_id)
u32	mpls_fib_table_find_or_create_and_lock (u32 table_id)
u32	mpls_fib_table_create_and_lock (void)
void	mpls_fib_table_destroy (mpls_fib_t *mf)
fib_node_index_t	mpls_fib_table_lookup (const mpls_fib_t *mf, mpls_label_t label, mpls_eos_bit_t eos)
void	mpls_fib_table_entry_insert (mpls_fib_t *mf, mpls_label_t label, mpls_eos_bit_t eos, fib_node_index_t lfei)
void	mpls_fib_table_entry_remove (mpls_fib_t *mf, mpls_label_t label, mpls_eos_bit_t eos)
void	mpls_fib_forwarding_table_update (mpls_fib_t *mf, mpls_label_t label, mpls_eos_bit_t eos, const dpo_id_t *dpo)
void	mpls_fib_forwarding_table_reset (mpls_fib_t *mf, mpls_label_t label, mpls_eos_bit_t eos)
flow_hash_config_t	mpls_fib_table_get_flow_hash_config (u32 fib_index)
static void	mpls_fib_table_show_all (const mpls_fib_t *mpls_fib, vlib_main_t *vm)
static void	mpls_fib_table_show_one (const mpls_fib_t *mpls_fib, mpls_label_t label, vlib_main_t *vm)
static clib_error_t *	mpls_fib_show (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)

Variables
static index_t	mpls_fib_drop_dpo_index = INDEX_INVALID
	An MPLS_FIB table;. More...
static vlib_cli_command_t	mpls_fib_show_command
	(constructor) VLIB_CLI_COMMAND (mpls_fib_show_command) More...

Macro Definition Documentation

#define MPLS_FLOW_HASH_DEFAULT   0

FIXME.

Definition at line 66 of file mpls_fib.c.

Function Documentation

static u32 mpls_fib_create_with_table_id ( u32  table_id )

static

Definition at line 90 of file mpls_fib.c.

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static u32 mpls_fib_entry_mk_key ( mpls_label_t  label, mpls_eos_bit_t  eos  )

inlinestatic

Definition at line 69 of file mpls_fib.c.

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void mpls_fib_forwarding_table_reset	(	mpls_fib_t *	mf,
		mpls_label_t	label,
		mpls_eos_bit_t	eos
	)

Definition at line 327 of file mpls_fib.c.

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void mpls_fib_forwarding_table_update	(	mpls_fib_t *	mf,
		mpls_label_t	label,
		mpls_eos_bit_t	eos,
		const dpo_id_t *	dpo
	)

Definition at line 312 of file mpls_fib.c.

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u32 mpls_fib_index_from_table_id

(

u32

table_id

)

Definition at line 77 of file mpls_fib.c.

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

static

Definition at line 389 of file mpls_fib.c.

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u32 mpls_fib_table_create_and_lock

(

void

)

Definition at line 237 of file mpls_fib.c.

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void mpls_fib_table_destroy

(

mpls_fib_t *

mf

)

Definition at line 243 of file mpls_fib.c.

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void mpls_fib_table_entry_insert	(	mpls_fib_t *	mf,
		mpls_label_t	label,
		mpls_eos_bit_t	eos,
		fib_node_index_t	lfei
	)

Definition at line 295 of file mpls_fib.c.

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void mpls_fib_table_entry_remove	(	mpls_fib_t *	mf,
		mpls_label_t	label,
		mpls_eos_bit_t	eos
	)

Definition at line 304 of file mpls_fib.c.

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u32 mpls_fib_table_find_or_create_and_lock

(

u32

table_id

)

Definition at line 224 of file mpls_fib.c.

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flow_hash_config_t mpls_fib_table_get_flow_hash_config

(

u32

fib_index

)

Definition at line 339 of file mpls_fib.c.

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fib_node_index_t mpls_fib_table_lookup	(	const mpls_fib_t *	mf,
		mpls_label_t	label,
		mpls_eos_bit_t	eos
	)

Definition at line 280 of file mpls_fib.c.

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static void mpls_fib_table_show_all ( const mpls_fib_t *  mpls_fib, vlib_main_t *  vm  )

static

Definition at line 346 of file mpls_fib.c.

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static void mpls_fib_table_show_one ( const mpls_fib_t *  mpls_fib, mpls_label_t  label, vlib_main_t *  vm  )

static

Definition at line 369 of file mpls_fib.c.

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Variable Documentation

index_t mpls_fib_drop_dpo_index = INDEX_INVALID

static

An MPLS_FIB table;.

The entries in the table are programmed wtih one or more MOIs. These MOIs may result in different forwarding actions for end-of-stack (EOS) and non-EOS packets. Whether the two actions are the same more often than they are different, or vice versa, is a function of the deployment in which the router is used and thus not predictable. The desgin choice to make with an MPLS_FIB table is: 1 - 20 bit key: label only. When the EOS and non-EOS actions differ the result is a 'EOS-choice' object. 2 - 21 bit key: label and EOS-bit. The result is then the specific action based on EOS-bit.

20 bit key: Advantages:

• lower memory overhead, since there are few DB entries. Disadvantages:
• slower DP performance in the case the chains differ, as more objects are encounterd in the switch path

21 bit key: Advantages:

• faster DP performance Disadvantages
• increased memory footprint.

Switching between schemes based on observed/measured action similarity is not considered on the grounds of complexity and flip-flopping.

VPP mantra - favour performance over memory. We choose a 21 bit key. All lookups in an MPLS_FIB table must result in a DPO of type load-balance. This is the default result which links to drop

Definition at line 61 of file mpls_fib.c.

vlib_cli_command_t mpls_fib_show_command

static

Initial value:

= {
    .path = "show mpls fib",
    .short_help = "show mpls fib [summary] [table <n>]",
    .function = mpls_fib_show,
}

(constructor) VLIB_CLI_COMMAND (mpls_fib_show_command)

Definition at line 435 of file mpls_fib.c.