l2_output.c File Reference

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Data Structures
struct	l2output_trace_t

Macros
#define	foreach_l2output_bad_intf_error   _(DROP, "L2 output to interface not in L2 mode or deleted")

Enumerations
enum	l2output_bad_intf_error_t { L2OUTPUT_BAD_INTF_N_ERROR }

Functions
char **	l2output_get_feat_names (void)
u8 *	format_l2_output_features (u8 *s, va_list *args)
static u8 *	format_l2output_trace (u8 *s, va_list *args)
static_always_inline void	split_horizon_violation (vlib_node_runtime_t *node, u8 shg, vlib_buffer_t *b, u16 *next)
	Check for split horizon violations. More...
static_always_inline void	l2output_process_batch_inline (vlib_main_t *vm, vlib_node_runtime_t *node, l2_output_config_t *config, vlib_buffer_t **b, i16 *cdo, u16 *next, u32 n_left, int l2_efp, int l2_vtr, int l2_pbb, int shg_set, int update_feature_bitmap)
static_always_inline void	l2output_set_buffer_error (vlib_buffer_t **b, u32 n_left, vlib_error_t error)
static_always_inline void	l2output_process_batch (vlib_main_t *vm, vlib_node_runtime_t *node, l2_output_config_t *config, vlib_buffer_t **b, i16 *cdo, u16 *next, u32 n_left, int l2_efp, int l2_vtr, int l2_pbb)
VLIB_NODE_FN()	l2output_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
VLIB_NODE_FN()	l2output_bad_intf_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	Output node for interfaces/tunnels which was in L2 mode but were changed to L3 mode or possibly deleted thereafter. More...
static clib_error_t *	l2output_init (vlib_main_t *vm)
void	l2output_create_output_node_mapping (vlib_main_t *vlib_main, vnet_main_t *vnet_main, u32 sw_if_index)
	Create a mapping in the next node mapping table for the given sw_if_index. More...
l2_output_config_t *	l2output_intf_config (u32 sw_if_index)
	Get a pointer to the config for the given interface. More...
void	l2output_intf_bitmap_enable (u32 sw_if_index, l2output_feat_masks_t feature_bitmap, u32 enable)
	Enable (or disable) the feature in the bitmap for the given interface. More...

Variables
static char *	l2output_feat_names []
l2output_main_t	l2output_main
static char *	l2output_error_strings []
vlib_node_registration_t	l2output_node
	(constructor) VLIB_REGISTER_NODE (l2output_node) More...
static char *	l2output_bad_intf_error_strings []
vlib_node_registration_t	l2output_bad_intf_node
	(constructor) VLIB_REGISTER_NODE (l2output_bad_intf_node) More...

Macro Definition Documentation

foreach_l2output_bad_intf_error

#define foreach_l2output_bad_intf_error   _(DROP, "L2 output to interface not in L2 mode or deleted")

Definition at line 467 of file l2_output.c.

Enumeration Type Documentation

l2output_bad_intf_error_t

enum l2output_bad_intf_error_t

Enumerator
L2OUTPUT_BAD_INTF_N_ERROR

Definition at line 476 of file l2_output.c.

Function Documentation

format_l2_output_features()

u8* format_l2_output_features	(	u8 *	s,
		va_list *	args
	)

Definition at line 45 of file l2_output.c.

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format_l2output_trace()

static u8* format_l2output_trace ( u8 *  s, va_list *  args  )

static

Definition at line 92 of file l2_output.c.

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l2output_bad_intf_node()

VLIB_NODE_FN() l2output_bad_intf_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Output node for interfaces/tunnels which was in L2 mode but were changed to L3 mode or possibly deleted thereafter.

On changing forwarding mode of any tunnel/interface from L2 to L3, its entry in l2_output_main table next_nodes.output_node_index_vec[sw_if_index] MUST be set to the value of L2OUTPUT_NEXT_BAD_INTF. Thus, if there are stale entries in the L2FIB for this sw_if_index, l2-output will send packets for this sw_if_index to the l2-output-bad-intf node which just setup the proper drop reason before sending packets to the error-drop node to drop the packet. Then, stale L2FIB entries for deleted tunnels won't cause possible packet or memory corruption.

Definition at line 497 of file l2_output.c.

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l2output_create_output_node_mapping()

void l2output_create_output_node_mapping	(	vlib_main_t *	vlib_main,
		vnet_main_t *	vnet_main,
		u32	sw_if_index
	)

Create a mapping in the next node mapping table for the given sw_if_index.

The next set of functions is for use by output feature graph nodes.

Definition at line 602 of file l2_output.c.

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l2output_get_feat_names()

char** l2output_get_feat_names

(

void

)

Definition at line 39 of file l2_output.c.

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l2output_init()

static clib_error_t* l2output_init ( vlib_main_t *  vm )

static

Definition at line 571 of file l2_output.c.

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l2output_intf_bitmap_enable()

void l2output_intf_bitmap_enable	(	u32	sw_if_index,
		l2output_feat_masks_t	feature_bitmap,
		u32	enable
	)

Enable (or disable) the feature in the bitmap for the given interface.

Definition at line 626 of file l2_output.c.

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l2output_intf_config()

l2_output_config_t* l2output_intf_config

(

u32

sw_if_index

)

Get a pointer to the config for the given interface.

Definition at line 616 of file l2_output.c.

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l2output_node()

VLIB_NODE_FN() l2output_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 291 of file l2_output.c.

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l2output_process_batch()

static_always_inline void l2output_process_batch	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		l2_output_config_t *	config,
		vlib_buffer_t **	b,
		i16 *	cdo,
		u16 *	next,
		u32	n_left,
		int	l2_efp,
		int	l2_vtr,
		int	l2_pbb
	)

Definition at line 267 of file l2_output.c.

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l2output_process_batch_inline()

static_always_inline void l2output_process_batch_inline	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		l2_output_config_t *	config,
		vlib_buffer_t **	b,
		i16 *	cdo,
		u16 *	next,
		u32	n_left,
		int	l2_efp,
		int	l2_vtr,
		int	l2_pbb,
		int	shg_set,
		int	update_feature_bitmap
	)

Definition at line 135 of file l2_output.c.

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l2output_set_buffer_error()

static_always_inline void l2output_set_buffer_error	(	vlib_buffer_t **	b,
		u32	n_left,
		vlib_error_t	error
	)

Definition at line 246 of file l2_output.c.

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split_horizon_violation()

static_always_inline void split_horizon_violation	(	vlib_node_runtime_t *	node,
		u8	shg,
		vlib_buffer_t *	b,
		u16 *	next
	)

Check for split horizon violations.

Return 0 if split horizon check passes, otherwise return non-zero. Packets should not be transmitted out an interface with the same split-horizon group as the input interface, except if the shg is 0 in which case the check always passes.

Definition at line 125 of file l2_output.c.

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Variable Documentation

l2output_bad_intf_error_strings

char* l2output_bad_intf_error_strings[]

static

Initial value:

= {
#define _(sym,string) 
  foreach_l2output_bad_intf_error

}

Definition at line 470 of file l2_output.c.

l2output_bad_intf_node

vlib_node_registration_t l2output_bad_intf_node

Initial value:

= {
  .name = "l2-output-bad-intf",
  .vector_size = sizeof (u32),
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors =  ARRAY_LEN(l2output_bad_intf_error_strings),
  .error_strings = l2output_bad_intf_error_strings,

  .n_next_nodes = 1,

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

(constructor) VLIB_REGISTER_NODE (l2output_bad_intf_node)

Definition at line 553 of file l2_output.c.

l2output_error_strings

char* l2output_error_strings[]

static

Initial value:

= {
#define _(sym,string) 
  foreach_l2output_error

}

Definition at line 111 of file l2_output.c.

l2output_feat_names

char* l2output_feat_names[]

static

Initial value:

= {
#define _(sym,name) 
  foreach_l2output_feat

}

Definition at line 32 of file l2_output.c.

l2output_main

l2output_main_t l2output_main

Definition at line 78 of file l2_output.c.

l2output_node

vlib_node_registration_t l2output_node

Initial value:

= {
  .name = "l2-output",
  .vector_size = sizeof (u32),
  .format_trace = format_l2output_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = ARRAY_LEN(l2output_error_strings),
  .error_strings = l2output_error_strings,

  .n_next_nodes = L2OUTPUT_N_NEXT,

  
  .next_nodes = {
        [L2OUTPUT_NEXT_DROP] = "error-drop",
        [L2OUTPUT_NEXT_BAD_INTF] = "l2-output-bad-intf",
  },
}

(constructor) VLIB_REGISTER_NODE (l2output_node)

Definition at line 447 of file l2_output.c.