adj_nbr.c File Reference

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Data Structures
struct	adj_db_count_ctx_t_
struct	adj_walk_ctx_t_
	Context for a walk of the adjacency neighbour DB. More...
struct	adj_nbr_interface_state_change_ctx_t_
	Context for the state change walk of the DB. More...

Macros
#define	ADJ_NBR_DEFAULT_HASH_NUM_BUCKETS   (64 * 64)
#define	ADJ_NBR_DEFAULT_HASH_MEMORY_SIZE   (32<<20)
#define	ADJ_NBR_SET_KEY(_key, _lt, _nh)
#define	ADJ_NBR_ITF_OK(_proto, _itf)

Typedefs
typedef struct adj_db_count_ctx_t_	adj_db_count_ctx_t
typedef struct adj_walk_ctx_t_	adj_walk_ctx_t
	Context for a walk of the adjacency neighbour DB. More...
typedef enum adj_nbr_interface_flags_t_	adj_nbr_interface_flags_t
	Flags associated with the interface state walks. More...
typedef struct adj_nbr_interface_state_change_ctx_t_	adj_nbr_interface_state_change_ctx_t
	Context for the state change walk of the DB. More...

Enumerations
enum	adj_nbr_interface_flags_t_ { ADJ_NBR_INTERFACE_UP = (1 << 0) }
	Flags associated with the interface state walks. More...

Functions
static	BVT (clib_bihash)
void	adj_nbr_remove (adj_index_t ai, fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index)
adj_index_t	adj_nbr_find (fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index)
	Lookup neighbor adjancency. More...
static u32	adj_get_nd_node (fib_protocol_t proto)
static void	adj_nbr_evaluate_feature (adj_index_t ai)
	Check and set feature flags if o/p interface has any o/p features. More...
static ip_adjacency_t *	adj_nbr_alloc (fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index)
adj_index_t	adj_nbr_add_or_lock (fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index)
	Neighbour Adjacency sub-type. More...
adj_index_t	adj_nbr_add_or_lock_w_rewrite (fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index, u8 *rewrite)
	Add (and lock) a new or lock an existing neighbour adjacency. More...
void	adj_nbr_update_rewrite (adj_index_t adj_index, adj_nbr_rewrite_flag_t flags, u8 *rewrite)
	adj_nbr_update_rewrite More...
void	adj_nbr_update_rewrite_internal (ip_adjacency_t *adj, ip_lookup_next_t adj_next_index, u32 this_node, u32 next_node, u8 *rewrite)
	adj_nbr_update_rewrite_internal More...
static void	adj_db_count (BVT(clib_bihash_kv)*kvp, void *arg)
u32	adj_nbr_db_size (void)
	Return the size of the adjacency database. More...
static void	adj_nbr_walk_cb (BVT(clib_bihash_kv)*kvp, void *arg)
void	adj_nbr_walk (u32 sw_if_index, fib_protocol_t adj_nh_proto, adj_walk_cb_t cb, void *ctx)
	Walk the neighbour Adjacencies on a given interface. More...
void	adj_nbr_walk_nh4 (u32 sw_if_index, const ip4_address_t *addr, adj_walk_cb_t cb, void *ctx)
	Walk adjacencies on a link with a given v4 next-hop. More...
void	adj_nbr_walk_nh6 (u32 sw_if_index, const ip6_address_t *addr, adj_walk_cb_t cb, void *ctx)
	Walk adjacencies on a link with a given v6 next-hop. More...
void	adj_nbr_walk_nh (u32 sw_if_index, fib_protocol_t adj_nh_proto, const ip46_address_t *nh, adj_walk_cb_t cb, void *ctx)
	Walk adjacencies on a link with a given next-hop. More...
static adj_walk_rc_t	adj_nbr_interface_state_change_one (adj_index_t ai, void *arg)
static clib_error_t *	adj_nbr_sw_interface_state_change (vnet_main_t *vnm, u32 sw_if_index, u32 flags)
	Registered function for SW interface state changes. More...
	VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO (adj_nbr_sw_interface_state_change, VNET_ITF_FUNC_PRIORITY_HIGH)
static walk_rc_t	adj_nbr_hw_sw_interface_state_change (vnet_main_t *vnm, u32 sw_if_index, void *arg)
	Invoked on each SW interface of a HW interface when the HW interface state changes. More...
static clib_error_t *	adj_nbr_hw_interface_state_change (vnet_main_t *vnm, u32 hw_if_index, u32 flags)
	Registered callback for HW interface state changes. More...
	VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO (adj_nbr_hw_interface_state_change, VNET_ITF_FUNC_PRIORITY_HIGH)
static adj_walk_rc_t	adj_nbr_interface_delete_one (adj_index_t ai, void *arg)
static clib_error_t *	adj_nbr_interface_add_del (vnet_main_t *vnm, u32 sw_if_index, u32 is_add)
	adj_nbr_interface_add_del More...
	VNET_SW_INTERFACE_ADD_DEL_FUNCTION (adj_nbr_interface_add_del)
static adj_walk_rc_t	adj_nbr_show_one (adj_index_t ai, void *arg)
static clib_error_t *	adj_nbr_show (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
u8 *	format_adj_nbr_incomplete (u8 *s, va_list *ap)
	Format aa incomplete neigbour (ARP) adjacency. More...
u8 *	format_adj_nbr (u8 *s, va_list *ap)
	Format a neigbour (REWRITE) adjacency. More...
static void	adj_dpo_lock (dpo_id_t *dpo)
static void	adj_dpo_unlock (dpo_id_t *dpo)
static void	adj_mem_show (void)
void	adj_nbr_module_init (void)
	Module initialisation. More...

Variables
static vlib_cli_command_t	ip4_show_fib_command
	(constructor) VLIB_CLI_COMMAND (ip4_show_fib_command) More...
static const dpo_vft_t	adj_nbr_dpo_vft
static const dpo_vft_t	adj_nbr_incompl_dpo_vft
static const char *const	nbr_ip4_nodes []
	The per-protocol VLIB graph nodes that are assigned to an adjacency object. More...
static const char *const	nbr_ip6_nodes []
static const char *const	nbr_mpls_nodes []
static const char *const	nbr_ethernet_nodes []
static const char *const *const	nbr_nodes [DPO_PROTO_NUM]
static const char *const	nbr_incomplete_ip4_nodes []
static const char *const	nbr_incomplete_ip6_nodes []
static const char *const	nbr_incomplete_mpls_nodes []
static const char *const *const	nbr_incomplete_nodes [DPO_PROTO_NUM]

Macro Definition Documentation

#define ADJ_NBR_DEFAULT_HASH_MEMORY_SIZE   (32<<20)

#define ADJ_NBR_DEFAULT_HASH_NUM_BUCKETS   (64 * 64)

#define ADJ_NBR_ITF_OK	(		_proto,
			_itf
	)

Value:

(((_itf) < vec_len(adj_nbr_tables[_proto])) &&  \
     (NULL != adj_nbr_tables[_proto][sw_if_index]))

#define ADJ_NBR_SET_KEY	(		_key,
			_lt,
			_nh
	)

Value:

{                                               \
    _key.key[0] = (_nh)->as_u64[0];             \
    _key.key[1] = (_nh)->as_u64[1];             \
    _key.key[2] = (_lt);                        \
}

Typedef Documentation

typedef struct adj_db_count_ctx_t_ adj_db_count_ctx_t

typedef enum adj_nbr_interface_flags_t_ adj_nbr_interface_flags_t

Flags associated with the interface state walks.

typedef struct adj_nbr_interface_state_change_ctx_t_ adj_nbr_interface_state_change_ctx_t

Context for the state change walk of the DB.

typedef struct adj_walk_ctx_t_ adj_walk_ctx_t

Context for a walk of the adjacency neighbour DB.

Enumeration Type Documentation

enum adj_nbr_interface_flags_t_

Flags associated with the interface state walks.

Enumerator
ADJ_NBR_INTERFACE_UP

Definition at line 671 of file adj_nbr.c.

Function Documentation

static void adj_db_count ( BVT(clib_bihash_kv)*  kvp, void *  arg  )

static

Definition at line 515 of file adj_nbr.c.

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static void adj_dpo_lock ( dpo_id_t *  dpo )

static

Definition at line 985 of file adj_nbr.c.

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static void adj_dpo_unlock ( dpo_id_t *  dpo )

static

Definition at line 990 of file adj_nbr.c.

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static u32 adj_get_nd_node ( fib_protocol_t  proto )

inlinestatic

Definition at line 121 of file adj_nbr.c.

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static void adj_mem_show ( void  )

static

Definition at line 996 of file adj_nbr.c.

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adj_index_t adj_nbr_add_or_lock	(	fib_protocol_t	nh_proto,
		vnet_link_t	link_type,
		const ip46_address_t *	nh_addr,
		u32	sw_if_index
	)

Neighbour Adjacency sub-type.

These adjs represent an L3 peer on a connected link.

Add (and lock) a new or lock an existing neighbour adjacency

Parameters

nh_proto	The protocol for the next-hop address (v4 or v6)
link_type	A description of the protocol of the packets that will forward through this adj. On an ethernet interface this is the MAC header's ether-type
nh_addr	The address of the next-hop/peer to send the packet to
sw_if_index	The interface on which the peer resides

Definition at line 214 of file adj_nbr.c.

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adj_index_t adj_nbr_add_or_lock_w_rewrite	(	fib_protocol_t	nh_proto,
		vnet_link_t	link_type,
		const ip46_address_t *	nh_addr,
		u32	sw_if_index,
		u8 *	rewrite
	)

Add (and lock) a new or lock an existing neighbour adjacency.

Parameters

nh_proto	The protocol for the next-hop address (v4 or v6)
link_type	A description of the protocol of the packets that will forward through this adj. On an ethernet interface this is the MAC header's ether-type
nh_addr	The address of the next-hop/peer to send the packet to
sw_if_index	The interface on which the peer resides
rewrite	The rewrite to prepend to packets

Definition at line 254 of file adj_nbr.c.

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static ip_adjacency_t* adj_nbr_alloc ( fib_protocol_t  nh_proto, vnet_link_t  link_type, const ip46_address_t *  nh_addr, u32  sw_if_index  )

static

Definition at line 176 of file adj_nbr.c.

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u32 adj_nbr_db_size

(

void

)

Return the size of the adjacency database.

for testing purposes

Definition at line 523 of file adj_nbr.c.

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static void adj_nbr_evaluate_feature ( adj_index_t  ai )

static

Check and set feature flags if o/p interface has any o/p features.

Definition at line 139 of file adj_nbr.c.

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adj_index_t adj_nbr_find	(	fib_protocol_t	nh_proto,
		vnet_link_t	link_type,
		const ip46_address_t *	nh_addr,
		u32	sw_if_index
	)

Lookup neighbor adjancency.

Definition at line 97 of file adj_nbr.c.

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static clib_error_t* adj_nbr_hw_interface_state_change ( vnet_main_t *  vnm, u32  hw_if_index, u32  flags  )

static

Registered callback for HW interface state changes.

Definition at line 778 of file adj_nbr.c.

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static walk_rc_t adj_nbr_hw_sw_interface_state_change ( vnet_main_t *  vnm, u32  sw_if_index, void *  arg  )

static

Invoked on each SW interface of a HW interface when the HW interface state changes.

Definition at line 755 of file adj_nbr.c.

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static clib_error_t* adj_nbr_interface_add_del ( vnet_main_t *  vnm, u32  sw_if_index, u32  is_add  )

static

adj_nbr_interface_add_del

Registered to receive interface Add and delete notifications

Definition at line 825 of file adj_nbr.c.

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static adj_walk_rc_t adj_nbr_interface_delete_one ( adj_index_t  ai, void *  arg  )

static

Definition at line 803 of file adj_nbr.c.

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static adj_walk_rc_t adj_nbr_interface_state_change_one ( adj_index_t  ai, void *  arg  )

static

Definition at line 688 of file adj_nbr.c.

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void adj_nbr_module_init

(

void

)

Module initialisation.

Definition at line 1077 of file adj_nbr.c.

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void adj_nbr_remove	(	adj_index_t	ai,
		fib_protocol_t	nh_proto,
		vnet_link_t	link_type,
		const ip46_address_t *	nh_addr,
		u32	sw_if_index
	)

Definition at line 79 of file adj_nbr.c.

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static clib_error_t* adj_nbr_show ( vlib_main_t *  vm, unformat_input_t *  input, vlib_cli_command_t *  cmd  )

static

Definition at line 876 of file adj_nbr.c.

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static adj_walk_rc_t adj_nbr_show_one ( adj_index_t  ai, void *  arg  )

static

Definition at line 864 of file adj_nbr.c.

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static clib_error_t* adj_nbr_sw_interface_state_change ( vnet_main_t *  vnm, u32  sw_if_index, u32  flags  )

static

Registered function for SW interface state changes.

Definition at line 721 of file adj_nbr.c.

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void adj_nbr_update_rewrite	(	adj_index_t	adj_index,
		adj_nbr_rewrite_flag_t	flags,
		u8 *	rewrite
	)

adj_nbr_update_rewrite

Update the rewrite string for an existing adjacecny.

Update the adjacency's rewrite string. A NULL string implies the rewirte 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 291 of file adj_nbr.c.

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void adj_nbr_update_rewrite_internal	(	ip_adjacency_t *	adj,
		ip_lookup_next_t	adj_next_index,
		u32	this_node,
		u32	next_node,
		u8 *	rewrite
	)

adj_nbr_update_rewrite_internal

Update the adjacency's rewrite string. A NULL string implies the rewirte 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 333 of file adj_nbr.c.

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void adj_nbr_walk	(	u32	sw_if_index,
		fib_protocol_t	adj_nh_proto,
		adj_walk_cb_t	cb,
		void *	ctx
	)

Walk the neighbour Adjacencies on a given interface.

Definition at line 567 of file adj_nbr.c.

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static void adj_nbr_walk_cb ( BVT(clib_bihash_kv)*  kvp, void *  arg  )

static

Definition at line 557 of file adj_nbr.c.

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void adj_nbr_walk_nh	(	u32	sw_if_index,
		fib_protocol_t	adj_nh_proto,
		const ip46_address_t *	nh,
		adj_walk_cb_t	cb,
		void *	ctx
	)

Walk adjacencies on a link with a given next-hop.

Walk the neighbour Adjacencies on a given interface with a given next-hop.

that is visit the adjacencies with different link types.

Definition at line 647 of file adj_nbr.c.

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void adj_nbr_walk_nh4	(	u32	sw_if_index,
		const ip4_address_t *	addr,
		adj_walk_cb_t	cb,
		void *	ctx
	)

Walk adjacencies on a link with a given v4 next-hop.

that is visit the adjacencies with different link types.

Definition at line 591 of file adj_nbr.c.

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void adj_nbr_walk_nh6	(	u32	sw_if_index,
		const ip6_address_t *	addr,
		adj_walk_cb_t	cb,
		void *	ctx
	)

Walk adjacencies on a link with a given v6 next-hop.

that is visit the adjacencies with different link types.

Definition at line 619 of file adj_nbr.c.

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static BVT ( clib_bihash  )

static

Definition at line 26 of file adj_nbr.c.

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

Format a neigbour (REWRITE) adjacency.

Definition at line 967 of file adj_nbr.c.

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

Format aa incomplete neigbour (ARP) adjacency.

Definition at line 948 of file adj_nbr.c.

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VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO	(	adj_nbr_hw_interface_state_change	,
		VNET_ITF_FUNC_PRIORITY_HIGH
	)

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VNET_SW_INTERFACE_ADD_DEL_FUNCTION

(

adj_nbr_interface_add_del

)

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VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO	(	adj_nbr_sw_interface_state_change	,
		VNET_ITF_FUNC_PRIORITY_HIGH
	)

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Variable Documentation

const dpo_vft_t adj_nbr_dpo_vft

static

Initial value:

= {
    .dv_lock = adj_dpo_lock,
    .dv_unlock = adj_dpo_unlock,
    .dv_format = format_adj_nbr,
    .dv_mem_show = adj_mem_show,
    .dv_get_urpf = adj_dpo_get_urpf,
}

Definition at line 1004 of file adj_nbr.c.

const dpo_vft_t adj_nbr_incompl_dpo_vft

static

Initial value:

= {
    .dv_lock = adj_dpo_lock,
    .dv_unlock = adj_dpo_unlock,
    .dv_format = format_adj_nbr_incomplete,
    .dv_get_urpf = adj_dpo_get_urpf,
}

Definition at line 1011 of file adj_nbr.c.

vlib_cli_command_t ip4_show_fib_command

static

Initial value:

= {
    .path = "show adj nbr",
    .short_help = "show adj nbr [<adj_index>] [interface]",
    .function = adj_nbr_show,
}

(constructor) VLIB_CLI_COMMAND (ip4_show_fib_command)

Definition at line 941 of file adj_nbr.c.

const char* const nbr_ethernet_nodes[]

static

Initial value:

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

Definition at line 1040 of file adj_nbr.c.

const char* const nbr_incomplete_ip4_nodes[]

static

Initial value:

=
{
    "ip4-arp",
    NULL,
}

Definition at line 1053 of file adj_nbr.c.

const char* const nbr_incomplete_ip6_nodes[]

static

Initial value:

=
{
    "ip6-discover-neighbor",
    NULL,
}

Definition at line 1058 of file adj_nbr.c.

const char* const nbr_incomplete_mpls_nodes[]

static

Initial value:

=
{
    "mpls-adj-incomplete",
    NULL,
}

Definition at line 1063 of file adj_nbr.c.

const char* const* const nbr_incomplete_nodes[DPO_PROTO_NUM]

static

Initial value:

=
{
    [DPO_PROTO_IP4]  = nbr_incomplete_ip4_nodes,
    [DPO_PROTO_IP6]  = nbr_incomplete_ip6_nodes,
    [DPO_PROTO_MPLS] = nbr_incomplete_mpls_nodes,
}

Definition at line 1069 of file adj_nbr.c.

const char* const nbr_ip4_nodes[]

static

Initial value:

=
{
    "ip4-rewrite",
    NULL,
}

The per-protocol VLIB graph nodes that are assigned to an adjacency object.

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

Definition at line 1025 of file adj_nbr.c.

const char* const nbr_ip6_nodes[]

static

Initial value:

=
{
    "ip6-rewrite",
    NULL,
}

Definition at line 1030 of file adj_nbr.c.

const char* const nbr_mpls_nodes[]

static

Initial value:

=
{
    "mpls-output",
    NULL,
}

Definition at line 1035 of file adj_nbr.c.

const char* const* const nbr_nodes[DPO_PROTO_NUM]

static

Initial value:

=
{
    [DPO_PROTO_IP4]  = nbr_ip4_nodes,
    [DPO_PROTO_IP6]  = nbr_ip6_nodes,
    [DPO_PROTO_MPLS] = nbr_mpls_nodes,
    [DPO_PROTO_ETHERNET] = nbr_ethernet_nodes,
}

Definition at line 1045 of file adj_nbr.c.