adj_midchain.h File Reference

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Typedefs
typedef enum adj_midchain_flag_t_	adj_midchain_flag_t
	Midchain Adjacency sub-type. More...

Enumerations
enum	adj_midchain_flag_t_ { ADJ_MIDCHAIN_FLAG_NONE = 0, ADJ_MIDCHAIN_FLAG_NO_COUNT = (1 << 0) }
	Midchain Adjacency sub-type. More...

Functions
void	adj_nbr_midchain_update_rewrite (adj_index_t adj_index, adj_midchain_fixup_t fixup, adj_midchain_flag_t flags, u8 *rewrite)
	Convert an existing neighbour adjacency into a midchain. More...
void	adj_nbr_midchain_stack (adj_index_t adj_index, const dpo_id_t *dpo)
	[re]stack a midchain. More...
void	adj_nbr_midchain_unstack (adj_index_t adj_index)
	unstack a midchain. More...
void	adj_midchain_module_init (void)
	Module initialisation. More...
u8 *	format_adj_midchain (u8 *s, va_list *ap)
	Format a midchain adjacency. More...

Typedef Documentation

typedef enum adj_midchain_flag_t_ adj_midchain_flag_t

Midchain Adjacency sub-type.

These adjs represent an L3 peer on a tunnel interface. The tunnel's adjacency is thus not the end of the chain, and needs to stack on/link to another chain (or portion of the graph) to reach the tunnel's destination. Flags controlling the midchain adjacency

Enumeration Type Documentation

enum adj_midchain_flag_t_

Midchain Adjacency sub-type.

These adjs represent an L3 peer on a tunnel interface. The tunnel's adjacency is thus not the end of the chain, and needs to stack on/link to another chain (or portion of the graph) to reach the tunnel's destination. Flags controlling the midchain adjacency

Enumerator
ADJ_MIDCHAIN_FLAG_NONE	No flags.
ADJ_MIDCHAIN_FLAG_NO_COUNT	Packets TX through the midchain do not increment the interface counters. This should be used when the adj is associated with an L2 interface and that L2 interface is in a bridege domain. In that case the packet will have traversed the interface's TX node, and hence have been counted, before it traverses ths midchain

Definition at line 30 of file adj_midchain.h.

Function Documentation

void adj_midchain_module_init

(

void

)

Module initialisation.

Definition at line 580 of file adj_midchain.c.

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void adj_nbr_midchain_stack	(	adj_index_t	adj_index,
		const dpo_id_t *	next
	)

[re]stack a midchain.

'Stacking' is the act of forming parent-child relationships in the data-plane graph.

Parameters

adj_index	The index of the midchain to stack
dpo	The parent DPO to stack onto (i.e. become a child of).

[re]stack a midchain.

Definition at line 483 of file adj_midchain.c.

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void adj_nbr_midchain_unstack

(

adj_index_t

adj_index

)

unstack a midchain.

This will break the chain between the midchain and the next graph section. This is a implemented as stack-on-drop

Parameters

adj_index

The index of the midchain to stack

unstack a midchain.

Unstack the adj. stack it on drop

Definition at line 460 of file adj_midchain.c.

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void adj_nbr_midchain_update_rewrite	(	adj_index_t	adj_index,
		adj_midchain_fixup_t	fixup,
		adj_midchain_flag_t	flags,
		u8 *	rewrite
	)

Convert an existing neighbour adjacency into a midchain.

Parameters

adj_index	The index of the neighbour adjacency.
post_rewrite_node	The VLIB graph node that provides the post-encap fixup. where 'fixup' is e.g., correcting chksum, length, etc.
rewrite	The rewrite.

Convert an existing neighbour adjacency into a midchain.

Update the adjacency's rewrite string. A NULL string implies the rewrite is reset (i.e. when ARP/ND etnry is gone). NB: the adj being updated may be handling traffic in the DP.

Definition at line 395 of file adj_midchain.c.

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u8* format_adj_midchain	(	u8 *	s,
		va_list *	ap
	)

Format a midchain adjacency.

Definition at line 500 of file adj_midchain.c.

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