Include dependency graph for dpo.h:

Data Structures
struct	dpo_id_t_
	The identity of a DPO is a combination of its type and its instance number/index of objects of that type. More...

struct	dpo_vft_t_
	A virtual function table regisitered for a DPO type. More...

Macros
#define	INDEX_INVALID ((index_t)(~0))
	Invalid index - used when no index is known blazoned capitals INVALID speak volumes where ~0 does not. More...

#define	DPO_PROTO_NUM ((dpo_proto_t)(DPO_PROTO_NSH+1))

#define	DPO_PROTO_NONE ((dpo_proto_t)(DPO_PROTO_NUM+1))

#define	DPO_PROTOS

#define	FOR_EACH_DPO_PROTO(_proto)

#define	DPO_TYPE_NUM DPO_LAST

#define	DPO_TYPES

#define	DPO_INVALID
	An initialiser for DPOs declared on the stack. More...

Typedefs
typedef u32	index_t
	A Data-Path Object is an object that represents actions that are applied to packets are they are switched through VPP's data-path. More...

typedef enum dpo_proto_t_	dpo_proto_t
	Data path protocol. More...

typedef enum dpo_type_t_	dpo_type_t
	Common types of data-path objects New types can be dynamically added using dpo_register_new_type() More...

typedef struct dpo_id_t_	dpo_id_t
	The identity of a DPO is a combination of its type and its instance number/index of objects of that type. More...

typedef void(*	dpo_lock_fn_t) (dpo_id_t *dpo)
	A lock function registered for a DPO type. More...

typedef void(*	dpo_unlock_fn_t) (dpo_id_t *dpo)
	An unlock function registered for a DPO type. More...

typedef void(*	dpo_mem_show_t) (void)
	An memory usage show command. More...

typedef u32 (	dpo_get_next_node_t) (const dpo_id_t *dpo)
	Given a DPO instance return a vector of node indices that the type/instance will use. More...

typedef u32(*	dpo_get_urpf_t) (const dpo_id_t *dpo)
	Given a DPO instance return an interface that can be used in an uRPF check. More...

typedef void(*	dpo_mk_interpose_t) (const dpo_id_t original, const dpo_id_t parent, dpo_id_t *clone)
	Called during FIB interposition when the originally registered DPO is used to 'clone' an instance for interposition at a particular location in the FIB graph. More...

typedef struct dpo_vft_t_	dpo_vft_t
	A virtual function table regisitered for a DPO type. More...

Enumerations
enum	dpo_proto_t_ { DPO_PROTO_IP4 = 0, DPO_PROTO_IP6, DPO_PROTO_MPLS, DPO_PROTO_ETHERNET, DPO_PROTO_BIER, DPO_PROTO_NSH }
	Data path protocol. More...

enum	dpo_type_t_ { DPO_FIRST, DPO_DROP, DPO_IP_NULL, DPO_PUNT, DPO_LOAD_BALANCE, DPO_REPLICATE, DPO_ADJACENCY, DPO_ADJACENCY_INCOMPLETE, DPO_ADJACENCY_MIDCHAIN, DPO_ADJACENCY_GLEAN, DPO_ADJACENCY_MCAST, DPO_ADJACENCY_MCAST_MIDCHAIN, DPO_RECEIVE, DPO_LOOKUP, DPO_LISP_CP, DPO_CLASSIFY, DPO_MPLS_DISPOSITION_PIPE, DPO_MPLS_DISPOSITION_UNIFORM, DPO_MFIB_ENTRY, DPO_INTERFACE_RX, DPO_INTERFACE_TX, DPO_DVR, DPO_L3_PROXY, DPO_BIER_TABLE, DPO_BIER_FMASK, DPO_BIER_IMP, DPO_BIER_DISP_TABLE, DPO_BIER_DISP_ENTRY, DPO_IP6_LL, DPO_LAST }
	Common types of data-path objects New types can be dynamically added using dpo_register_new_type() More...

Functions
	STATIC_ASSERT (sizeof(dpo_id_t)<=sizeof(u64), "DPO ID is greater than sizeof u64 " "atomic updates need to be revisited")

static int	dpo_id_is_valid (const dpo_id_t *dpoi)
	Return true if the DPO object is valid, i.e. More...

dpo_proto_t	vnet_link_to_dpo_proto (vnet_link_t linkt)

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...

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_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 DPOs for equality 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...

u8 *	format_dpo_id (u8 s, va_list args)
	Format a DPO_id_t oject More...

u8 *	format_dpo_type (u8 s, va_list args)
	format a DPO type More...

u8 *	format_dpo_proto (u8 s, va_list args)
	format a DPO protocol More...

vnet_link_t	dpo_proto_to_link (dpo_proto_t dp)
	format a DPO protocol More...

void	dpo_stack (dpo_type_t child_type, dpo_proto_t child_proto, dpo_id_t dpo, const dpo_id_t parent_dpo)
	Set and stack a DPO. More...

void	dpo_stack_from_node (u32 child_node, dpo_id_t dpo, const dpo_id_t parent)
	Set and stack a DPO. More...

u32	dpo_get_urpf (const dpo_id_t *dpo)
	Get a uRPF interface for the DPO. 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...

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...

Macro Definition Documentation

◆ DPO_INVALID

#define DPO_INVALID

Value:

{                                  \
    .dpoi_type = DPO_FIRST,        \
    .dpoi_proto = DPO_PROTO_NONE,  \
    .dpoi_index = INDEX_INVALID,   \
    .dpoi_next_node = 0,           \
}

An initialiser for DPOs declared on the stack.

Thenext node is set to 0 since VLIB graph nodes should set 0 index to drop.

Definition at line 195 of file dpo.h.

◆ DPO_PROTO_NONE

#define DPO_PROTO_NONE ((dpo_proto_t)(DPO_PROTO_NUM+1))

Definition at line 71 of file dpo.h.

◆ DPO_PROTO_NUM

#define DPO_PROTO_NUM ((dpo_proto_t)(DPO_PROTO_NSH+1))

Definition at line 70 of file dpo.h.

◆ DPO_PROTOS

#define DPO_PROTOS

Value:

{               \
    [DPO_PROTO_IP4]  = "ip4",   \
    [DPO_PROTO_IP6]  = "ip6",   \
    [DPO_PROTO_ETHERNET]  = "ethernet", \
    [DPO_PROTO_MPLS] = "mpls",  \
    [DPO_PROTO_NSH] = "nsh",    \
    [DPO_PROTO_BIER] = "bier",  \
}

Definition at line 73 of file dpo.h.

◆ DPO_TYPE_NUM

#define DPO_TYPE_NUM DPO_LAST

Definition at line 130 of file dpo.h.

◆ DPO_TYPES

#define DPO_TYPES

Value:

{                       \
    [DPO_FIRST] = "dpo-invalid",        \
    [DPO_DROP] = "dpo-drop",    \
    [DPO_IP_NULL] = "dpo-ip-null",              \
    [DPO_PUNT] = "dpo-punt",    \
    [DPO_ADJACENCY] = "dpo-adjacency",  \
    [DPO_ADJACENCY_INCOMPLETE] = "dpo-adjacency-incomplete",    \
    [DPO_ADJACENCY_MIDCHAIN] = "dpo-adjacency-midcahin",        \
    [DPO_ADJACENCY_GLEAN] = "dpo-glean",        \
    [DPO_ADJACENCY_MCAST] = "dpo-adj-mcast",    \
    [DPO_ADJACENCY_MCAST_MIDCHAIN] = "dpo-adj-mcast-midchain",  \
    [DPO_RECEIVE] = "dpo-receive",      \
    [DPO_LOOKUP] = "dpo-lookup",        \
    [DPO_LOAD_BALANCE] = "dpo-load-balance",    \
    [DPO_REPLICATE] = "dpo-replicate",  \
    [DPO_LISP_CP] = "dpo-lisp-cp",      \
    [DPO_CLASSIFY] = "dpo-classify",    \
    [DPO_MPLS_DISPOSITION_PIPE] = "dpo-mpls-diposition-pipe", \
    [DPO_MPLS_DISPOSITION_UNIFORM] = "dpo-mpls-diposition-uniform", \
    [DPO_MFIB_ENTRY] = "dpo-mfib-entry", \
    [DPO_INTERFACE_RX] = "dpo-interface-rx",    \
    [DPO_INTERFACE_TX] = "dpo-interface-tx",    \
    [DPO_DVR] = "dpo-dvr",      \
    [DPO_L3_PROXY] = "dpo-l3-proxy",    \
    [DPO_BIER_TABLE] = "bier-table",    \
    [DPO_BIER_FMASK] = "bier-fmask",    \
    [DPO_BIER_IMP] = "bier-imposition", \
    [DPO_BIER_DISP_ENTRY] = "bier-disp-entry",  \
    [DPO_BIER_DISP_TABLE] = "bier-disp-table",  \
    [DPO_IP6_LL] = "ip6-link-local",    \
}

Definition at line 132 of file dpo.h.

◆ FOR_EACH_DPO_PROTO

#define FOR_EACH_DPO_PROTO ( _proto )

Value:

for (_proto = DPO_PROTO_IP4;      \
         _proto <= DPO_PROTO_NSH;    \
         _proto++)

Definition at line 82 of file dpo.h.

◆ INDEX_INVALID

#define INDEX_INVALID ((index_t)(~0))

Invalid index - used when no index is known blazoned capitals INVALID speak volumes where ~0 does not.

Definition at line 47 of file dpo.h.

Typedef Documentation

◆ dpo_get_next_node_t

typedef u32*(* dpo_get_next_node_t) (const dpo_id_t *dpo)

Given a DPO instance return a vector of node indices that the type/instance will use.

Definition at line 376 of file dpo.h.

◆ dpo_get_urpf_t

typedef u32(* dpo_get_urpf_t) (const dpo_id_t *dpo)

Given a DPO instance return an interface that can be used in an uRPF check.

Definition at line 382 of file dpo.h.

◆ dpo_id_t

typedef struct dpo_id_t_ dpo_id_t

The identity of a DPO is a combination of its type and its instance number/index of objects of that type.

◆ dpo_lock_fn_t

typedef void(* dpo_lock_fn_t) (dpo_id_t *dpo)

A lock function registered for a DPO type.

Definition at line 360 of file dpo.h.

◆ dpo_mem_show_t

typedef void(* dpo_mem_show_t) (void)

An memory usage show command.

Definition at line 370 of file dpo.h.

◆ dpo_mk_interpose_t

typedef void(* dpo_mk_interpose_t) (const dpo_id_t *original, const dpo_id_t *parent, dpo_id_t *clone)

Called during FIB interposition when the originally registered DPO is used to 'clone' an instance for interposition at a particular location in the FIB graph.

The parent is the next DPO in the chain that the clone will be used instead of. The clone may then choose to stack itself on the parent.

Definition at line 392 of file dpo.h.

◆ dpo_proto_t

typedef enum dpo_proto_t_ dpo_proto_t

Data path protocol.

Actions performed on packets in the data-plane can be described and represented by protocol independent objects, i.e. ADJACENCY, but the spceifics actions required during ADJACENCY processing can be protocol dependent. For example, the adjacency rewrite node performs a ip4 checksum calculation, ip6 and MPLS do not, all 3 perform a TTL decrement. The VLIB graph nodes are thus protocol dependent, and thus each graph edge/arc is too. When programming a DPO's next node arc from child to parent it is thus required to know the parent's data-path protocol so the correct arc index can be used.

◆ dpo_type_t

typedef enum dpo_type_t_ dpo_type_t

Common types of data-path objects New types can be dynamically added using dpo_register_new_type()

◆ dpo_unlock_fn_t

typedef void(* dpo_unlock_fn_t) (dpo_id_t *dpo)

An unlock function registered for a DPO type.

Definition at line 365 of file dpo.h.

◆ dpo_vft_t

typedef struct dpo_vft_t_ dpo_vft_t

A virtual function table regisitered for a DPO type.

◆ index_t

typedef u32 index_t

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

The DPO can be considered to be like is a base class that is specialised by other objects to provide concreate actions

The VLIB graph nodes are graph of DPO types, the DPO graph is a graph of instances. An index for adjacencies. Alas 'C' is not typesafe enough to b0rk when a u32 is used instead of an index_t. However, for us humans, we can glean much more intent from the declaration foo barindex_t t); than we can from foo bar(u32 t);

Definition at line 41 of file dpo.h.

Enumeration Type Documentation

◆ dpo_proto_t_

enum dpo_proto_t_

Data path protocol.

Actions performed on packets in the data-plane can be described and represented by protocol independent objects, i.e. ADJACENCY, but the spceifics actions required during ADJACENCY processing can be protocol dependent. For example, the adjacency rewrite node performs a ip4 checksum calculation, ip6 and MPLS do not, all 3 perform a TTL decrement. The VLIB graph nodes are thus protocol dependent, and thus each graph edge/arc is too. When programming a DPO's next node arc from child to parent it is thus required to know the parent's data-path protocol so the correct arc index can be used.

Enumerator
DPO_PROTO_IP4
DPO_PROTO_IP6
DPO_PROTO_MPLS
DPO_PROTO_ETHERNET
DPO_PROTO_BIER
DPO_PROTO_NSH

Definition at line 60 of file dpo.h.

◆ dpo_type_t_

enum dpo_type_t_

Common types of data-path objects New types can be dynamically added using dpo_register_new_type()

Enumerator
DPO_FIRST	A non-zero value first so we can spot unitialisation errors.
DPO_DROP
DPO_IP_NULL
DPO_PUNT
DPO_LOAD_BALANCE	load-balancing over a choice of [un]equal cost paths
DPO_REPLICATE
DPO_ADJACENCY
DPO_ADJACENCY_INCOMPLETE
DPO_ADJACENCY_MIDCHAIN
DPO_ADJACENCY_GLEAN
DPO_ADJACENCY_MCAST
DPO_ADJACENCY_MCAST_MIDCHAIN
DPO_RECEIVE
DPO_LOOKUP
DPO_LISP_CP
DPO_CLASSIFY
DPO_MPLS_DISPOSITION_PIPE
DPO_MPLS_DISPOSITION_UNIFORM
DPO_MFIB_ENTRY
DPO_INTERFACE_RX
DPO_INTERFACE_TX
DPO_DVR
DPO_L3_PROXY
DPO_BIER_TABLE
DPO_BIER_FMASK
DPO_BIER_IMP
DPO_BIER_DISP_TABLE
DPO_BIER_DISP_ENTRY
DPO_IP6_LL
DPO_LAST

Definition at line 91 of file dpo.h.

Function Documentation

◆ dpo_cmp()

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

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_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.

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

Parameters

child_type	Child DPO type.
child_proto	Child DPO proto
parent_type	Parent DPO type.
parent_proto	Parent DPO proto

Returns: The VLIB Graph node index

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_id_is_valid()

static int dpo_id_is_valid ( const dpo_id_t * dpoi )

inlinestatic

Return true if the DPO object is valid, i.e.

has been initialised.

Definition at line 207 of file dpo.h.

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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_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_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
	)

Set and stack a DPO.

The DPO passed is set to the parent DPO and the necessary VLIB graph arcs are created. The child_type and child_proto are used to get the VLID nodes from which the arcs are added.

Parameters

child_type	Child DPO type.
child_proto	Child DPO proto

dpo This is the DPO to stack and set.

parent_dpo The parent DPO to stack onto.

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
	)

Set and stack a DPO.

The DPO passed is set to the parent DPO and the necessary VLIB graph arcs are created, from the child_node passed.

Parameters

child_node	The VLIB grpah node index to create an arc from to the parent
dpo	This is the DPO to stack and set.
parent_dpo	The parent DPO to stack onto.

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_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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◆ STATIC_ASSERT()

STATIC_ASSERT	(	sizeof(dpo_id_t)<=sizeof(u64)	,
		"DPO ID is greater than sizeof u64 " "atomic updates need to be revisited"
	)

◆ 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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Data Structures

Macros

Typedefs

Enumerations

Functions

Macro Definition Documentation

◆ DPO_INVALID

◆ DPO_PROTO_NONE

◆ DPO_PROTO_NUM

◆ DPO_PROTOS

◆ DPO_TYPE_NUM

◆ DPO_TYPES

◆ FOR_EACH_DPO_PROTO

◆ INDEX_INVALID

Typedef Documentation

◆ dpo_get_next_node_t

◆ dpo_get_urpf_t

◆ dpo_id_t

◆ dpo_lock_fn_t

◆ dpo_mem_show_t

◆ dpo_mk_interpose_t

◆ dpo_proto_t

◆ dpo_type_t

◆ dpo_unlock_fn_t

◆ dpo_vft_t

◆ index_t

Enumeration Type Documentation

◆ dpo_proto_t_

◆ dpo_type_t_

Function Documentation

◆ dpo_cmp()

◆ dpo_copy()

◆ dpo_get_next_node_by_type_and_proto()

◆ dpo_get_urpf()

◆ dpo_id_is_valid()

◆ dpo_is_adj()

◆ dpo_lock()

◆ dpo_mk_interpose()

◆ dpo_proto_to_link()

◆ dpo_register()

◆ dpo_register_new_type()

◆ dpo_reset()

◆ dpo_set()

◆ dpo_stack()

◆ dpo_stack_from_node()

◆ dpo_unlock()

◆ format_dpo_id()

◆ format_dpo_proto()

◆ format_dpo_type()

◆ STATIC_ASSERT()

◆ vnet_link_to_dpo_proto()