fib_entry_track.c File Reference

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Functions
static fib_entry_delegate_t *	fib_entry_track_delegate_add (u32 fib_index, const fib_prefix_t *prefix)
fib_node_index_t	fib_entry_track (u32 fib_index, const fib_prefix_t *prefix, fib_node_type_t child_type, index_t child_index, u32 *sibling)
	Trackers are used on FIB entries by objects that which to track the changing state of the entry. More...
void	fib_entry_untrack (fib_node_index_t fei, u32 sibling)
	Stop tracking a FIB entry. More...
static fib_node_t *	fib_entry_track_get_node (fib_node_index_t index)
static fib_entry_delegate_t *	fib_entry_delegate_from_fib_node (fib_node_t *node)
static void	fib_entry_track_last_lock_gone (fib_node_t *node)
static fib_node_back_walk_rc_t	fib_entry_track_back_walk_notify (fib_node_t *node, fib_node_back_walk_ctx_t *ctx)
static void	fib_entry_track_show_memory (void)
void	fib_entry_track_module_init (void)

Variables
static const fib_node_vft_t	fib_entry_track_vft

Function Documentation

static fib_entry_delegate_t* fib_entry_delegate_from_fib_node ( fib_node_t *  node )

static

Definition at line 107 of file fib_entry_track.c.

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fib_node_index_t fib_entry_track	(	u32	fib_index,
		const fib_prefix_t *	prefix,
		fib_node_type_t	child_type,
		index_t	child_index,
		u32 *	sibling
	)

Trackers are used on FIB entries by objects that which to track the changing state of the entry.

For example a tunnel would track its destination address to be informed of reachability changes.

The benefit of this aproach is that each time a new client tracks the entry it doesn't RR source it. When an entry is sourced all its children are updated. Thus, new clients tracking an entry is O(n^2). With the tracker as indirection, the entry is sourced only once. Track a FIB entry

Parameters

fib_index	The FIB the entry is in
prefix	The Prefix of the entry to track
child_type	The type of object that is tracking this entry
child_index	The pool index of the object tracking
sigbling	[RETURNED] The sibling index of the child on the tracker

Returns

The index of the FIB entry

Definition at line 49 of file fib_entry_track.c.

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static fib_node_back_walk_rc_t fib_entry_track_back_walk_notify ( fib_node_t *  node, fib_node_back_walk_ctx_t *  ctx  )

static

Definition at line 141 of file fib_entry_track.c.

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static fib_entry_delegate_t* fib_entry_track_delegate_add ( u32  fib_index, const fib_prefix_t *  prefix  )

static

Definition at line 22 of file fib_entry_track.c.

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static fib_node_t* fib_entry_track_get_node ( fib_node_index_t  index )

static

Definition at line 98 of file fib_entry_track.c.

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static void fib_entry_track_last_lock_gone ( fib_node_t *  node )

static

Definition at line 116 of file fib_entry_track.c.

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void fib_entry_track_module_init

(

void

)

Definition at line 175 of file fib_entry_track.c.

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static void fib_entry_track_show_memory ( void  )

static

Definition at line 160 of file fib_entry_track.c.

void fib_entry_untrack	(	fib_node_index_t	fei,
		u32	sibling
	)

Stop tracking a FIB entry.

Parameters

fei	FIB entry index (as returned from the track API above)
sibling	Sibling index (as returned from the track API above)

Definition at line 79 of file fib_entry_track.c.

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Variable Documentation

const fib_node_vft_t fib_entry_track_vft

static

Initial value:

= {
    .fnv_get = fib_entry_track_get_node,
    .fnv_last_lock = fib_entry_track_last_lock_gone,
    .fnv_back_walk = fib_entry_track_back_walk_notify,
    .fnv_mem_show = fib_entry_track_show_memory,
}

Definition at line 167 of file fib_entry_track.c.