Data Structures¶

struct rte_node_mbuf_overload_fields
struct rte_node_mbuf_dynfield

Macros¶

#define RTE_NODE_MBUF_PERSISTENT_FIELDS_SIZE (0)
#define RTE_NODE_MBUF_OVERLOADABLE_FIELDS_SIZE (8)
#define RTE_NODE_MBUF_DYNFIELD_SIZE (RTE_NODE_MBUF_PERSISTENT_FIELDS_SIZE + RTE_NODE_MBUF_OVERLOADABLE_FIELDS_SIZE)

Typedefs¶

typedef struct rte_node_mbuf_overload_fields rte_node_mbuf_overload_fields_t
typedef struct rte_node_mbuf_dynfield rte_node_mbuf_dynfield_t

Functions¶

static __rte_experimental __rte_always_inline rte_node_mbuf_dynfield_t * rte_node_mbuf_dynfield_get (struct rte_mbuf *m, const int offset)
static __rte_experimental __rte_always_inline rte_node_mbuf_overload_fields_t * rte_node_mbuf_overload_fields_get (struct rte_mbuf *m, const int offset)
__rte_experimental int rte_node_mbuf_dynfield_register (void)

#define RTE_NODE_MBUF_PERSISTENT_FIELDS_SIZE (0)¶

Size of persistent mbuf fields

Definition at line 29 of file rte_node_mbuf_dynfield.h.

#define RTE_NODE_MBUF_OVERLOADABLE_FIELDS_SIZE (8)¶

Size of overloadable mbuf fields

Definition at line 34 of file rte_node_mbuf_dynfield.h.

#define RTE_NODE_MBUF_DYNFIELD_SIZE (RTE_NODE_MBUF_PERSISTENT_FIELDS_SIZE + RTE_NODE_MBUF_OVERLOADABLE_FIELDS_SIZE)¶

Size of node mbuf dynamic field

Definition at line 38 of file rte_node_mbuf_dynfield.h.

typedef struct rte_node_mbuf_overload_fields rte_node_mbuf_overload_fields_t¶

Node mbuf overloadable data.

Out-of-tree nodes can repurpose overloadable fields via rte_node_mbuf_overload_fields_get(mbuf). Overloadable fields are not preserved and typically can be used with-in two adjacent nodes in the graph.

typedef struct rte_node_mbuf_dynfield rte_node_mbuf_dynfield_t¶

rte_node specific mbuf dynamic field structure [rte_node_mbuf_dynfield_t]

It holds two types of fields:

1.

Persistent fields: Fields which are preserved across nodes during graph walk.

•

Eg: rx/tx interface etc

2.

Overloadable fields: Fields which can be repurposed by two adjacent nodes.

__rte_experimental __rte_always_inline rte_node_mbuf_dynfield_t * rte_node_mbuf_dynfield_get (struct rte_mbuf * m, const int offset) [static]¶

For a given mbuf and dynamic offset, return pointer to rte_node_mbuf_dynfield_t *

Parameters

Returns

Definition at line 107 of file rte_node_mbuf_dynfield.h.

__rte_experimental __rte_always_inline rte_node_mbuf_overload_fields_t * rte_node_mbuf_overload_fields_get (struct rte_mbuf * m, const int offset) [static]¶

For a given mbuf and dynamic offset, return pointer to overloadable fields. Nodes can typecast returned pointer to reuse for their own purpose.

Parameters

Returns

Definition at line 125 of file rte_node_mbuf_dynfield.h.

__rte_experimental int rte_node_mbuf_dynfield_register (void )¶

Register rte_node specific common mbuf dynamic field region. Can be called in rte_node_register()->init() function to save offset in node->ctx

In process() function, node->ctx can be passed to

• rte_node_mbuf_dynfield_get(mbuf, offset)
• rte_node_mbuf_overload_fields_get(mbuf, offset)

Can be called multiple times by any number of nodes in init() function.

• Very first call registers dynamic field and returns offset.
• Subsequent calls return same offset.

Returns