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Functions
void	adj_lock (adj_index_t adj_index)
	An adjacency is a representation of an attached L3 peer. More...

void	adj_unlock (adj_index_t adj_index)
	Release a reference counting lock on the adjacency. More...

u32	adj_child_add (adj_index_t adj_index, fib_node_type_t type, fib_node_index_t child_index)
	Add a child dependent to an adjacency. More...

void	adj_child_remove (adj_index_t adj_index, u32 sibling_index)
	Remove a child dependent. More...

void	adj_walk (u32 sw_if_index, adj_walk_cb_t cb, void *ctx)
	Walk the Adjacencies on a given interface. More...

vnet_link_t	adj_get_link_type (adj_index_t ai)
	Return the link type of the adjacency. More...

u32	adj_get_sw_if_index (adj_index_t ai)
	Return the sw interface index of the adjacency. More...

const u8 *	adj_get_rewrite (adj_index_t ai)
	Return the link type of the adjacency. More...

void	adj_feature_update (u32 sw_if_index, u8 arc_index, u8 is_enable)
	Notify the adjacency subsystem that the features settings for an interface have changed. More...

static ip_adjacency_t *	adj_get (adj_index_t adj_index)
	Get a pointer to an adjacency object from its index. More...

static int	adj_are_counters_enabled (void)
	Get the global configuration option for enabling per-adj counters. More...

Variables
ip_adjacency_t *	adj_pool
	The global adjacnecy pool. More...

vlib_combined_counter_main_t	adjacency_counters
	Adjacency packet counters. More...

int	adj_per_adj_counters
	Global Config for enabling per-adjacency counters This is configurable because it comes with a non-negligible performance cost. More...

Function Documentation

static int adj_are_counters_enabled ( void )

inlinestatic

Get the global configuration option for enabling per-adj counters.

Definition at line 137 of file adj.h.

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u32 adj_child_add	(	adj_index_t	adj_index,
		fib_node_type_t	type,
		fib_node_index_t	child_index
	)

Add a child dependent to an adjacency.

The child will thus be informed via its registerd back-walk function when the adjacency state changes.

Definition at line 234 of file adj.c.

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void adj_child_remove	(	adj_index_t	adj_index,
		u32	sibling_index
	)

Remove a child dependent.

Definition at line 251 of file adj.c.

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void adj_feature_update	(	u32	sw_if_index,
		u8	arc_index,
		u8	is_enable
	)

Notify the adjacency subsystem that the features settings for an interface have changed.

Definition at line 302 of file adj.c.

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static ip_adjacency_t* adj_get ( adj_index_t adj_index )

inlinestatic

Get a pointer to an adjacency object from its index.

Definition at line 128 of file adj.h.

vnet_link_t adj_get_link_type ( adj_index_t ai )

Return the link type of the adjacency.

Definition at line 340 of file adj.c.

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const u8* adj_get_rewrite ( adj_index_t ai )

Return the link type of the adjacency.

Definition at line 366 of file adj.c.

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u32 adj_get_sw_if_index ( adj_index_t ai )

Return the sw interface index of the adjacency.

Definition at line 353 of file adj.c.

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void adj_lock ( adj_index_t adj_index )

An adjacency is a representation of an attached L3 peer.

Adjacency Sub-types:

neighbour: a representation of an attached L3 peer. Key:{addr,interface,link/ether-type} SHARED
glean: used to drive ARP/ND for packets destined to a local sub-net. 'glean' mean use the packet's destination address as the target address in the ARP packet. UNSHARED. Only one per-interface.
midchain: a nighbour adj on a virtual/tunnel interface.
rewrite: an adj with no key, but with a rewrite string.

The API to create and update the adjacency is very sub-type specific. This is intentional as it encourages the user to carefully consider which adjacency sub-type they are really using, and hence assign it data in the appropriate sub-type space in the union of sub-types. This prevents the adj becoming a disorganised dumping group for 'my features needs a u16 somewhere' data. It is important to enforce this approach as space in the adjacency is a premium, as we need it to fit in 1 cache line.

the API is also based around an index to an ajdacency not a raw pointer. This is so the user doesn't suffer the same limp inducing firearm injuries that the author suffered as the adjacenices can realloc.

Take a reference counting lock on the adjacency

Definition at line 198 of file adj.c.

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void adj_unlock ( adj_index_t adj_index )

Release a reference counting lock on the adjacency.

Definition at line 215 of file adj.c.

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void adj_walk	(	u32	sw_if_index,
		adj_walk_cb_t	cb,
		void *	ctx
	)

Walk the Adjacencies on a given interface.

Definition at line 321 of file adj.c.

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Variable Documentation

int adj_per_adj_counters

Global Config for enabling per-adjacency counters This is configurable because it comes with a non-negligible performance cost.

By default these are disabled.

Definition at line 42 of file adj.c.

ip_adjacency_t* adj_pool

The global adjacnecy pool.

Exposed for fast/inline data-plane access

Definition at line 36 of file adj.c.

vlib_combined_counter_main_t adjacency_counters

Adjacency packet counters.

Definition at line 31 of file adj.c.

Functions

Variables

Function Documentation

Variable Documentation