adj_midchain.c File Reference

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Functions
u8	adj_is_midchain (adj_index_t ai)
static u32	adj_get_midchain_node (vnet_link_t link)
static u8	adj_midchain_get_feature_arc_index_for_link_type (const ip_adjacency_t *adj)
static u32	adj_nbr_midchain_get_tx_node (ip_adjacency_t *adj)
void	adj_midchain_teardown (ip_adjacency_t *adj)
	adj_midchain_setup More...
void	adj_midchain_setup (adj_index_t adj_index, adj_midchain_fixup_t fixup, const void *data, adj_flags_t flags)
	adj_midchain_setup More...
void	adj_nbr_midchain_update_rewrite (adj_index_t adj_index, adj_midchain_fixup_t fixup, const void *fixup_data, adj_flags_t flags, u8 *rewrite)
	adj_nbr_midchain_update_rewrite More...
void	adj_nbr_midchain_update_next_node (adj_index_t adj_index, u32 next_node)
	Update the VLIB node to which packets are sent post processing. More...
void	adj_nbr_midchain_reset_next_node (adj_index_t adj_index)
	Return the adjacency's next node to its default value. More...
void	adj_nbr_midchain_unstack (adj_index_t adj_index)
	adj_nbr_midchain_unstack More...
void	adj_nbr_midchain_stack_on_fib_entry (adj_index_t ai, fib_node_index_t fei, fib_forward_chain_type_t fct)
	[re]stack a midchain. More...
void	adj_nbr_midchain_stack (adj_index_t adj_index, const dpo_id_t *next)
	adj_nbr_midchain_stack More...
int	adj_ndr_midchain_recursive_loop_detect (adj_index_t ai, fib_node_index_t **entry_indicies)
	descend the FIB graph looking for loops More...
u8 *	format_adj_midchain (u8 *s, va_list *ap)
	Format a midchain adjacency. More...
static void	adj_dpo_lock (dpo_id_t *dpo)
static void	adj_dpo_unlock (dpo_id_t *dpo)
void	adj_midchain_module_init (void)
	Module initialisation. More...

Variables
const static dpo_vft_t	adj_midchain_dpo_vft
const static char *const	midchain_ip4_nodes []
	The per-protocol VLIB graph nodes that are assigned to a midchain object. More...
const static char *const	midchain_ip6_nodes []
const static char *const	midchain_mpls_nodes []
const static char *const	midchain_ethernet_nodes []
const static char *const	midchain_nsh_nodes []
const static char *const *const	midchain_nodes [DPO_PROTO_NUM]

Function Documentation

adj_dpo_lock()

static void adj_dpo_lock ( dpo_id_t *  dpo )

static

Definition at line 505 of file adj_midchain.c.

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adj_dpo_unlock()

static void adj_dpo_unlock ( dpo_id_t *  dpo )

static

Definition at line 510 of file adj_midchain.c.

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adj_get_midchain_node()

static u32 adj_get_midchain_node ( vnet_link_t  link )

inlinestatic

Definition at line 57 of file adj_midchain.c.

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adj_is_midchain()

u8 adj_is_midchain

(

adj_index_t

ai

)

Definition at line 29 of file adj_midchain.c.

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adj_midchain_get_feature_arc_index_for_link_type()

static u8 adj_midchain_get_feature_arc_index_for_link_type ( const ip_adjacency_t *  adj )

static

Definition at line 78 of file adj_midchain.c.

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adj_midchain_module_init()

void adj_midchain_module_init

(

void

)

Module initialisation.

Definition at line 566 of file adj_midchain.c.

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adj_midchain_setup()

void adj_midchain_setup	(	adj_index_t	adj_index,
		adj_midchain_fixup_t	fixup,
		const void *	data,
		adj_flags_t	flags
	)

adj_midchain_setup

Setup the adj as a mid-chain

Definition at line 153 of file adj_midchain.c.

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adj_midchain_teardown()

void adj_midchain_teardown

(

ip_adjacency_t *

adj

)

adj_midchain_setup

Setup the adj as a mid-chain

Definition at line 132 of file adj_midchain.c.

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adj_nbr_midchain_get_tx_node()

static u32 adj_nbr_midchain_get_tx_node ( ip_adjacency_t *  adj )

static

Definition at line 119 of file adj_midchain.c.

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adj_nbr_midchain_reset_next_node()

void adj_nbr_midchain_reset_next_node

(

adj_index_t

adj_index

)

Return the adjacency's next node to its default value.

Parameters

adj_index

The index of the neighbour adjacency.

Definition at line 272 of file adj_midchain.c.

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adj_nbr_midchain_stack()

void adj_nbr_midchain_stack	(	adj_index_t	adj_index,
		const dpo_id_t *	next
	)

adj_nbr_midchain_stack

[re]stack a midchain.

Definition at line 429 of file adj_midchain.c.

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adj_nbr_midchain_stack_on_fib_entry()

void adj_nbr_midchain_stack_on_fib_entry	(	adj_index_t	adj_index,
		fib_node_index_t	fei,
		fib_forward_chain_type_t	fct
	)

[re]stack a midchain.

'Stacking' is the act of forming parent-child relationships in the data-plane graph. Since function performs recursive loop detection.

Parameters

adj_index	The index of the midchain to stack
fei	The FIB entry to stack on
fct	The chain type to use from the fib entry fowarding

Definition at line 335 of file adj_midchain.c.

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adj_nbr_midchain_unstack()

void adj_nbr_midchain_unstack

(

adj_index_t

adj_index

)

adj_nbr_midchain_unstack

unstack a midchain.

Unstack the adj. stack it on drop

Definition at line 303 of file adj_midchain.c.

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adj_nbr_midchain_update_next_node()

void adj_nbr_midchain_update_next_node	(	adj_index_t	adj_index,
		u32	node_index
	)

Update the VLIB node to which packets are sent post processing.

Parameters

adj_index	The index of the neighbour adjacency.
node	node-index to send to

Definition at line 246 of file adj_midchain.c.

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adj_nbr_midchain_update_rewrite()

void adj_nbr_midchain_update_rewrite	(	adj_index_t	adj_index,
		adj_midchain_fixup_t	fixup,
		const void *	fixup_data,
		adj_flags_t	flags,
		u8 *	rewrite
	)

adj_nbr_midchain_update_rewrite

Midchain Adjacency sub-type.

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

Definition at line 213 of file adj_midchain.c.

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adj_ndr_midchain_recursive_loop_detect()

int adj_ndr_midchain_recursive_loop_detect	(	adj_index_t	ai,
		fib_node_index_t **	entry_indicies
	)

descend the FIB graph looking for loops

Parameters

ai	The adj index to traverse
entry_indicies)	A pointer to a vector of FIB entries already visited.

Definition at line 447 of file adj_midchain.c.

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format_adj_midchain()

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

Format a midchain adjacency.

Definition at line 474 of file adj_midchain.c.

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Variable Documentation

adj_midchain_dpo_vft

const static dpo_vft_t adj_midchain_dpo_vft

static

Initial value:

= {
    .dv_lock = adj_dpo_lock,
    .dv_unlock = adj_dpo_unlock,
    .dv_format = format_adj_midchain,
    .dv_get_urpf = adj_dpo_get_urpf,
    .dv_get_mtu = adj_dpo_get_mtu,
}

Definition at line 515 of file adj_midchain.c.

midchain_ethernet_nodes

const static char* const midchain_ethernet_nodes[]

static

Initial value:

=
{
    "adj-l2-midchain",
    NULL,
}

Definition at line 545 of file adj_midchain.c.

midchain_ip4_nodes

const static char* const midchain_ip4_nodes[]

static

Initial value:

=
{
    "ip4-midchain",
    NULL,
}

The per-protocol VLIB graph nodes that are assigned to a midchain object.

this means that these graph nodes are ones from which a midchain is the parent object in the DPO-graph.

Definition at line 530 of file adj_midchain.c.

midchain_ip6_nodes

const static char* const midchain_ip6_nodes[]

static

Initial value:

=
{
    "ip6-midchain",
    NULL,
}

Definition at line 535 of file adj_midchain.c.

midchain_mpls_nodes

const static char* const midchain_mpls_nodes[]

static

Initial value:

=
{
    "mpls-midchain",
    NULL,
}

Definition at line 540 of file adj_midchain.c.

midchain_nodes

const static char* const * const midchain_nodes[DPO_PROTO_NUM]

static

Initial value:

=
{
    [DPO_PROTO_IP4]  = midchain_ip4_nodes,
    [DPO_PROTO_IP6]  = midchain_ip6_nodes,
    [DPO_PROTO_MPLS] = midchain_mpls_nodes,
    [DPO_PROTO_ETHERNET] = midchain_ethernet_nodes,
    [DPO_PROTO_NSH] = midchain_nsh_nodes,
}

Definition at line 556 of file adj_midchain.c.

midchain_nsh_nodes

const static char* const midchain_nsh_nodes[]

static

Initial value:

=
{
    "adj-nsh-midchain",
    NULL,
}

Definition at line 550 of file adj_midchain.c.