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)
static u8 *	format_l2output_trace (u8 *s, va_list *args)
static_always_inline u32	split_horizon_violation (u8 shg1, u8 shg2)
	Check for split horizon violations. More...
static_always_inline void	l2output_vtr (vlib_node_runtime_t *node, l2_output_config_t *config, u32 feature_bitmap, vlib_buffer_t *b, u32 *next)
static_always_inline uword	l2output_node_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int do_trace)
static uword	l2output_node_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
static uword	l2output_bad_intf_node_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
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, u32 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 []
static vlib_node_registration_t	l2output_node
	(constructor) VLIB_REGISTER_NODE (l2output_node) More...
static char *	l2output_bad_intf_error_strings []
static vlib_node_registration_t	l2output_bad_intf_node
	Output node for interfaces/tunnels which was in L2 mode but were changed to L3 mode or possibly deleted thereafter. More...

Macro Definition Documentation

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

Definition at line 478 of file l2_output.c.

Enumeration Type Documentation

enum l2output_bad_intf_error_t

Enumerator
L2OUTPUT_BAD_INTF_N_ERROR

Definition at line 487 of file l2_output.c.

Function Documentation

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

static

Definition at line 56 of file l2_output.c.

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static uword l2output_bad_intf_node_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 510 of file l2_output.c.

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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 615 of file l2_output.c.

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char** l2output_get_feat_names

(

void

)

Definition at line 38 of file l2_output.c.

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clib_error_t* l2output_init

(

vlib_main_t *

vm

)

Definition at line 585 of file l2_output.c.

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

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

Definition at line 639 of file l2_output.c.

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l2_output_config_t* l2output_intf_config

(

u32

sw_if_index

)

Get a pointer to the config for the given interface.

Definition at line 629 of file l2_output.c.

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static uword l2output_node_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 448 of file l2_output.c.

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static_always_inline uword l2output_node_inline	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame,
		int	do_trace
	)

Definition at line 150 of file l2_output.c.

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static_always_inline void l2output_vtr	(	vlib_node_runtime_t *	node,
		l2_output_config_t *	config,
		u32	feature_bitmap,
		vlib_buffer_t *	b,
		u32 *	next
	)

Definition at line 102 of file l2_output.c.

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static_always_inline u32 split_horizon_violation	(	u8	shg1,
		u8	shg2
	)

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 89 of file l2_output.c.

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Variable Documentation

char* l2output_bad_intf_error_strings[]

static

Initial value:

= {
#define _(sym,string) 
  foreach_l2output_bad_intf_error

}

Definition at line 481 of file l2_output.c.

static vlib_node_registration_t l2output_bad_intf_node

static

Initial value:

= {
  .function = l2output_bad_intf_node_fn,
  .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",
  },
}

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

(constructor) VLIB_REGISTER_NODE (l2output_bad_intf_node)

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 delted tunnels won't cause possible packet or memory corrpution.

Definition at line 507 of file l2_output.c.

char* l2output_error_strings[]

static

Initial value:

= {
#define _(sym,string) 
  foreach_l2output_error

}

Definition at line 75 of file l2_output.c.

char* l2output_feat_names[]

static

Initial value:

= {
#define _(sym,name) 
  foreach_l2output_feat

}

Definition at line 31 of file l2_output.c.

l2output_main_t l2output_main

Definition at line 43 of file l2_output.c.

static vlib_node_registration_t l2output_node

static

Initial value:

= {
  .function = l2output_node_fn,
  .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 147 of file l2_output.c.