l2_efp_filter.c File Reference

EFP-filter - Ethernet Flow Point Filter. More...

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Data Structures
struct	l2_efp_filter_main_t
struct	l2_efp_filter_trace_t

Macros
#define	foreach_l2_efp_filter_error

Enumerations
enum	l2_efp_filter_error_t { L2_EFP_FILTER_N_ERROR }
enum	l2_efp_filter_next_t { L2_EFP_FILTER_NEXT_DROP, L2_EFP_FILTER_N_NEXT }

Functions
static u8 *	format_l2_efp_filter_trace (u8 *s, va_list *args)
static_always_inline void	extract_keys (vnet_main_t *vnet_main, u32 sw_if_index0, vlib_buffer_t *b0, u32 *port_sw_if_index0, u16 *first_ethertype0, u16 *outer_id0, u16 *inner_id0, u32 *match_flags0)
	Extract fields from the packet that will be used in interface classification. More...
VLIB_NODE_FN()	l2_efp_filter_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
clib_error_t *	l2_efp_filter_init (vlib_main_t *vm)
void	l2_efp_filter_configure (vnet_main_t *vnet_main, u32 sw_if_index, u8 enable)
	Enable/disable the EFP Filter check on the subinterface. More...
static clib_error_t *	int_l2_efp_filter (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
	Set subinterface egress efp filter enable/disable. More...

Variables
l2_efp_filter_main_t	l2_efp_filter_main
static char *	l2_efp_filter_error_strings []
vlib_node_registration_t	l2_efp_filter_node
	(constructor) VLIB_REGISTER_NODE (l2_efp_filter_node) More...
static vlib_cli_command_t	int_l2_efp_filter_cli
	(constructor) VLIB_CLI_COMMAND (int_l2_efp_filter_cli) More...

Detailed Description

EFP-filter - Ethernet Flow Point Filter.

It is possible to transmit a packet out a subinterface with VLAN tags that are not compatible with that subinterface. In other words, if that packet arrived on the output port, it would not be classified as coming from the output subinterface. This can happen in various ways: through misconfiguration, by putting subinterfaces with different VLAN encaps in the same bridge-domain, etc. The EFP Filter Check detects such packets and drops them. It consists of two checks, one that verifies the packet prior to output VLAN tag rewrite and one that verifies the packet after VLAN tag rewrite.

Definition in file l2_efp_filter.c.

Macro Definition Documentation

foreach_l2_efp_filter_error

#define foreach_l2_efp_filter_error

Value:

_(L2_EFP_FILTER, "L2 EFP filter packets")               \
_(DROP,          "L2 EFP filter post-rewrite drops")

Definition at line 90 of file l2_efp_filter.c.

Enumeration Type Documentation

l2_efp_filter_error_t

enum l2_efp_filter_error_t

Enumerator
L2_EFP_FILTER_N_ERROR

Definition at line 94 of file l2_efp_filter.c.

l2_efp_filter_next_t

enum l2_efp_filter_next_t

Enumerator
L2_EFP_FILTER_NEXT_DROP
L2_EFP_FILTER_N_NEXT

Definition at line 108 of file l2_efp_filter.c.

Function Documentation

extract_keys()

static_always_inline void extract_keys	(	vnet_main_t *	vnet_main,
		u32	sw_if_index0,
		vlib_buffer_t *	b0,
		u32 *	port_sw_if_index0,
		u16 *	first_ethertype0,
		u16 *	outer_id0,
		u16 *	inner_id0,
		u32 *	match_flags0
	)

Extract fields from the packet that will be used in interface classification.

Definition at line 120 of file l2_efp_filter.c.

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format_l2_efp_filter_trace()

static u8* format_l2_efp_filter_trace ( u8 *  s, va_list *  args  )

static

Definition at line 67 of file l2_efp_filter.c.

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int_l2_efp_filter()

static clib_error_t* int_l2_efp_filter ( vlib_main_t *  vm, unformat_input_t *  input, vlib_cli_command_t *  cmd  )

static

Set subinterface egress efp filter enable/disable.

The CLI format is: set interface l2 efp-filter <interface> [disable]]

Definition at line 518 of file l2_efp_filter.c.

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l2_efp_filter_configure()

void l2_efp_filter_configure	(	vnet_main_t *	vnet_main,
		u32	sw_if_index,
		u8	enable
	)

Enable/disable the EFP Filter check on the subinterface.

Definition at line 505 of file l2_efp_filter.c.

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l2_efp_filter_init()

clib_error_t* l2_efp_filter_init

(

vlib_main_t *

vm

)

Definition at line 483 of file l2_efp_filter.c.

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l2_efp_filter_node()

VLIB_NODE_FN() l2_efp_filter_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 175 of file l2_efp_filter.c.

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Variable Documentation

int_l2_efp_filter_cli

vlib_cli_command_t int_l2_efp_filter_cli

static

Initial value:

= {
  .path = "set interface l2 efp-filter",
  .short_help = "set interface l2 efp-filter <interface> [disable]",
  .function = int_l2_efp_filter,
}

(constructor) VLIB_CLI_COMMAND (int_l2_efp_filter_cli)

Definition at line 561 of file l2_efp_filter.c.

l2_efp_filter_error_strings

char* l2_efp_filter_error_strings[]

static

Initial value:

= {
#define _(sym,string) 
  foreach_l2_efp_filter_error

}

Definition at line 102 of file l2_efp_filter.c.

l2_efp_filter_main

l2_efp_filter_main_t l2_efp_filter_main

Definition at line 87 of file l2_efp_filter.c.

l2_efp_filter_node

vlib_node_registration_t l2_efp_filter_node

Initial value:

= {
  .name = "l2-efp-filter",
  .vector_size = sizeof (u32),
  .format_trace = format_l2_efp_filter_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = ARRAY_LEN(l2_efp_filter_error_strings),
  .error_strings = l2_efp_filter_error_strings,

  .n_next_nodes = L2_EFP_FILTER_N_NEXT,

  
  .next_nodes = {
       [L2_EFP_FILTER_NEXT_DROP]  = "error-drop",
  },
}

(constructor) VLIB_REGISTER_NODE (l2_efp_filter_node)

Definition at line 463 of file l2_efp_filter.c.