dpo.c File Reference

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Functions
dpo_proto_t	vnet_link_to_dpo_proto (vnet_link_t linkt)
vnet_link_t	dpo_proto_to_link (dpo_proto_t dp)
	format a DPO protocol More...
u8 *	format_dpo_type (u8 *s, va_list *args)
	format a DPO type More...
u8 *	format_dpo_id (u8 *s, va_list *args)
	Format a DPO_id_t oject More...
u8 *	format_dpo_proto (u8 *s, va_list *args)
	format a DPO protocol More...
void	dpo_set (dpo_id_t *dpo, dpo_type_t type, dpo_proto_t proto, index_t index)
	Set/create a DPO ID The DPO will be locked. More...
void	dpo_reset (dpo_id_t *dpo)
	reset a DPO ID The DPO will be unlocked. More...
int	dpo_cmp (const dpo_id_t *dpo1, const dpo_id_t *dpo2)
	Compare two Data-path objects. More...
void	dpo_copy (dpo_id_t *dst, const dpo_id_t *src)
	atomic copy a data-plane object. More...
int	dpo_is_adj (const dpo_id_t *dpo)
	Return TRUE is the DPO is any type of adjacency. More...
static u32 *	dpo_default_get_next_node (const dpo_id_t *dpo)
static void	dpo_default_mk_interpose (const dpo_id_t *original, const dpo_id_t *parent, dpo_id_t *clone)
	A default variant of the make interpose function that just returns the original. More...
void	dpo_register (dpo_type_t type, const dpo_vft_t *vft, const char *const *const *nodes)
	For a given DPO type Register: More...
dpo_type_t	dpo_register_new_type (const dpo_vft_t *vft, const char *const *const *nodes)
	Create and register a new DPO type. More...
void	dpo_mk_interpose (const dpo_id_t *original, const dpo_id_t *parent, dpo_id_t *clone)
	Make an interpose DPO from an original. More...
void	dpo_lock (dpo_id_t *dpo)
	Take a reference counting lock on the DPO. More...
void	dpo_unlock (dpo_id_t *dpo)
	Release a reference counting lock on the DPO. More...
u32	dpo_get_urpf (const dpo_id_t *dpo)
	Get a uRPF interface for the DPO. More...
static u32	dpo_get_next_node (dpo_type_t child_type, dpo_proto_t child_proto, const dpo_id_t *parent_dpo)
u32	dpo_get_next_node_by_type_and_proto (dpo_type_t child_type, dpo_proto_t child_proto, dpo_type_t parent_type, dpo_proto_t parent_proto)
	return already stacked up next node index for a given child_type/child_proto and parent_type/patent_proto. More...
static void	dpo_stack_i (u32 edge, dpo_id_t *dpo, const dpo_id_t *parent)
	Stack one DPO object on another, and thus establish a child parent relationship. More...
void	dpo_stack (dpo_type_t child_type, dpo_proto_t child_proto, dpo_id_t *dpo, const dpo_id_t *parent)
	Stack one DPO object on another, and thus establish a child-parent relationship. More...
void	dpo_stack_from_node (u32 child_node_index, dpo_id_t *dpo, const dpo_id_t *parent)
	Stack one DPO object on another, and thus establish a child parent relationship. More...
static clib_error_t *	dpo_module_init (vlib_main_t *vm)
static clib_error_t *	dpo_memory_show (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)

Variables
static const char *	dpo_type_names [] = DPO_TYPES
	A Data-Path Object is an object that represents actions that are applied to packets are they are switched through VPP. More...
static const char *	dpo_proto_names [] = DPO_PROTOS
static dpo_vft_t *	dpo_vfts
	Vector of virtual function tables for the DPO types. More...
static const char *const *const **	dpo_nodes
	vector of graph node names associated with each DPO type and protocol. More...
static u32 ****	dpo_edges
	Vector of edge indicies from parent DPO nodes to child. More...
static dpo_type_t	dpo_dynamic = DPO_LAST
	The DPO type value that can be assigned to the next dynamic type registration. More...
static vlib_cli_command_t	show_fib_memory
	(constructor) VLIB_CLI_COMMAND (show_fib_memory) More...

Function Documentation

dpo_cmp()

int dpo_cmp	(	const dpo_id_t *	dpo1,
		const dpo_id_t *	dpo2
	)

Compare two Data-path objects.

compare two DPOs for equality

like memcmp, return 0 is matching, !0 otherwise.

Definition at line 248 of file dpo.c.

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dpo_copy()

void dpo_copy	(	dpo_id_t *	dst,
		const dpo_id_t *	src
	)

atomic copy a data-plane object.

This is safe to use when the dst DPO is currently switching packets

Definition at line 261 of file dpo.c.

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dpo_default_get_next_node()

static u32* dpo_default_get_next_node ( const dpo_id_t *  dpo )

static

Definition at line 286 of file dpo.c.

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dpo_default_mk_interpose()

static void dpo_default_mk_interpose ( const dpo_id_t *  original, const dpo_id_t *  parent, dpo_id_t *  clone  )

static

A default variant of the make interpose function that just returns the original.

Definition at line 313 of file dpo.c.

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dpo_get_next_node()

static u32 dpo_get_next_node ( dpo_type_t  child_type, dpo_proto_t  child_proto, const dpo_id_t *  parent_dpo  )

static

Definition at line 393 of file dpo.c.

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dpo_get_next_node_by_type_and_proto()

u32 dpo_get_next_node_by_type_and_proto	(	dpo_type_t	child_type,
		dpo_proto_t	child_proto,
		dpo_type_t	parent_type,
		dpo_proto_t	parent_proto
	)

return already stacked up next node index for a given child_type/child_proto and parent_type/patent_proto.

Return already stacked up next node index for a given child_type/child_proto and parent_type/patent_proto.

The VLIB graph arc used is taken from the parent and child types passed.

Definition at line 471 of file dpo.c.

dpo_get_urpf()

u32 dpo_get_urpf

(

const dpo_id_t *

dpo

)

Get a uRPF interface for the DPO.

Parameters

dpo	The DPO from which to get the uRPF interface

Returns

valid SW interface index or ~0

Definition at line 381 of file dpo.c.

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dpo_is_adj()

int dpo_is_adj

(

const dpo_id_t *

dpo

)

Return TRUE is the DPO is any type of adjacency.

Definition at line 277 of file dpo.c.

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dpo_lock()

void dpo_lock

(

dpo_id_t *

dpo

)

Take a reference counting lock on the DPO.

Definition at line 363 of file dpo.c.

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dpo_memory_show()

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

static

Definition at line 598 of file dpo.c.

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dpo_mk_interpose()

void dpo_mk_interpose	(	const dpo_id_t *	original,
		const dpo_id_t *	parent,
		dpo_id_t *	clone
	)

Make an interpose DPO from an original.

Definition at line 352 of file dpo.c.

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dpo_module_init()

static clib_error_t* dpo_module_init ( vlib_main_t *  vm )

static

Definition at line 574 of file dpo.c.

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dpo_proto_to_link()

vnet_link_t dpo_proto_to_link

(

dpo_proto_t

dp

)

format a DPO protocol

Definition at line 117 of file dpo.c.

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dpo_register()

void dpo_register	(	dpo_type_t	type,
		const dpo_vft_t *	vft,
		const char *const *const *	nodes
	)

For a given DPO type Register:

• a virtual function table
• a NULL terminated array of graph nodes from which that object type will originate packets, i.e. the nodes in which the object type will be the parent DPO in the DP graph. The ndoes are per-data-path protocol (see above).

Parameters

type	The type being registered.
vft	The virtual function table to register for the type.
nodes	The string description of the per-protocol VLIB graph nodes.

Definition at line 321 of file dpo.c.

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dpo_register_new_type()

dpo_type_t dpo_register_new_type	(	const dpo_vft_t *	vft,
		const char *const *const *	nodes
	)

Create and register a new DPO type.

This can be used by plugins to create new DPO types that are not listed in dpo_type_t enum

Parameters

vft	The virtual function table to register for the type.
nodes	The string description of the per-protocol VLIB graph nodes.

Returns

The new dpo_type_t

Definition at line 341 of file dpo.c.

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dpo_reset()

void dpo_reset

(

dpo_id_t *

dpo

)

reset a DPO ID The DPO will be unlocked.

Parameters

dpo	The DPO object to reset

Definition at line 231 of file dpo.c.

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dpo_set()

void dpo_set	(	dpo_id_t *	dpo,
		dpo_type_t	type,
		dpo_proto_t	proto,
		index_t	index
	)

Set/create a DPO ID The DPO will be locked.

Parameters

dpo	The DPO object to configure
type	The dpo_type_t of the DPO
proto	The dpo_proto_t of the DPO
index	The type specific index of the DPO

Definition at line 185 of file dpo.c.

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dpo_stack()

void dpo_stack	(	dpo_type_t	child_type,
		dpo_proto_t	child_proto,
		dpo_id_t *	dpo,
		const dpo_id_t *	parent
	)

Stack one DPO object on another, and thus establish a child-parent relationship.

Set and stack a DPO.

The VLIB graph arc used is taken from the parent and child types passed.

Definition at line 515 of file dpo.c.

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dpo_stack_from_node()

void dpo_stack_from_node	(	u32	child_node_index,
		dpo_id_t *	dpo,
		const dpo_id_t *	parent
	)

Stack one DPO object on another, and thus establish a child parent relationship.

Set and stack a DPO.

A new VLIB graph arc is created from the child node passed to the nodes registered by the parent. The VLIB infra will ensure this arc is added only once.

Definition at line 530 of file dpo.c.

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dpo_stack_i()

static void dpo_stack_i ( u32  edge, dpo_id_t *  dpo, const dpo_id_t *  parent  )

static

Stack one DPO object on another, and thus establish a child parent relationship.

The VLIB graph arc used is taken from the parent and child types passed.

Definition at line 485 of file dpo.c.

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dpo_unlock()

void dpo_unlock

(

dpo_id_t *

dpo

)

Release a reference counting lock on the DPO.

Definition at line 372 of file dpo.c.

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format_dpo_id()

u8* format_dpo_id	(	u8 *	s,
		va_list *	args
	)

Format a DPO_id_t oject

Definition at line 147 of file dpo.c.

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format_dpo_proto()

u8* format_dpo_proto	(	u8 *	s,
		va_list *	args
	)

format a DPO protocol

Definition at line 177 of file dpo.c.

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format_dpo_type()

u8* format_dpo_type	(	u8 *	s,
		va_list *	args
	)

format a DPO type

Definition at line 137 of file dpo.c.

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vnet_link_to_dpo_proto()

dpo_proto_t vnet_link_to_dpo_proto

(

vnet_link_t

linkt

)

Definition at line 95 of file dpo.c.

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Variable Documentation

dpo_dynamic

dpo_type_t dpo_dynamic = DPO_LAST

static

The DPO type value that can be assigned to the next dynamic type registration.

Definition at line 92 of file dpo.c.

dpo_edges

u32**** dpo_edges

static

Vector of edge indicies from parent DPO nodes to child.

dpo_edges[child_type][child_proto][parent_type][parent_proto] = edge_index

This array is derived at init time from the dpo_nodes above. Note that the third dimension in dpo_nodes is lost, hence, the edge index from each node MUST be the same. Including both the child and parent protocol is required to support the case where it changes as the graph is traversed, most notably when an MPLS label is popped.

Note that this array is child type specific, not child instance specific.

Definition at line 86 of file dpo.c.

dpo_nodes

const char* const* const** dpo_nodes

static

vector of graph node names associated with each DPO type and protocol.

dpo_nodes[child_type][child_proto][node_X] = node_name; i.e. dpo_node[DPO_LOAD_BALANCE][DPO_PROTO_IP4][0] = "ip4-lookup" dpo_node[DPO_LOAD_BALANCE][DPO_PROTO_IP4][1] = "ip4-load-balance"

This is a vector so we can dynamically register new DPO types in plugins.

Definition at line 70 of file dpo.c.

dpo_proto_names

const char* dpo_proto_names[] = DPO_PROTOS

static

Definition at line 51 of file dpo.c.

dpo_type_names

const char* dpo_type_names[] = DPO_TYPES

static

A Data-Path Object is an object that represents actions that are applied to packets are they are switched through VPP.

The DPO is a base class that is specialised by other objects to provide concrete actions

The VLIB graph nodes are graph of types, the DPO graph is a graph of instances. Array of char* names for the DPO types and protos

Definition at line 50 of file dpo.c.

dpo_vfts

dpo_vft_t* dpo_vfts

static

Vector of virtual function tables for the DPO types.

This is a vector so we can dynamically register new DPO types in plugins.

Definition at line 58 of file dpo.c.

show_fib_memory

vlib_cli_command_t show_fib_memory

static

Initial value:

= {
    .path = "show dpo memory",
    .function = dpo_memory_show,
    .short_help = "show dpo memory",
}

(constructor) VLIB_CLI_COMMAND (show_fib_memory)

Definition at line 634 of file dpo.c.