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rte_fib.h(3) DPDK rte_fib.h(3)

NAME

rte_fib.h

SYNOPSIS

#include <stdint.h>

Data Structures


struct rte_fib_conf

Macros


#define RTE_FIB_MAXDEPTH 32

Typedefs


typedef int(* rte_fib_modify_fn_t) (struct rte_fib *fib, uint32_t ip, uint8_t depth, uint64_t next_hop, int op)
typedef void(* rte_fib_lookup_fn_t) (void *fib, const uint32_t *ips, uint64_t *next_hops, const unsigned int n)

Enumerations


enum rte_fib_type { RTE_FIB_DUMMY, RTE_FIB_DIR24_8 }
enum rte_fib_dir24_8_nh_sz
enum rte_fib_lookup_type { RTE_FIB_LOOKUP_DEFAULT, RTE_FIB_LOOKUP_DIR24_8_SCALAR_MACRO, RTE_FIB_LOOKUP_DIR24_8_SCALAR_INLINE, RTE_FIB_LOOKUP_DIR24_8_SCALAR_UNI, RTE_FIB_LOOKUP_DIR24_8_VECTOR_AVX512 }

Functions


struct rte_fib * rte_fib_create (const char *name, int socket_id, struct rte_fib_conf *conf)
struct rte_fib * rte_fib_find_existing (const char *name)
void rte_fib_free (struct rte_fib *fib)
int rte_fib_add (struct rte_fib *fib, uint32_t ip, uint8_t depth, uint64_t next_hop)
int rte_fib_delete (struct rte_fib *fib, uint32_t ip, uint8_t depth)
int rte_fib_lookup_bulk (struct rte_fib *fib, uint32_t *ips, uint64_t *next_hops, int n)
void * rte_fib_get_dp (struct rte_fib *fib)
struct rte_rib * rte_fib_get_rib (struct rte_fib *fib)
int rte_fib_select_lookup (struct rte_fib *fib, enum rte_fib_lookup_type type)

Detailed Description

RTE FIB library.

FIB (Forwarding information base) implementation for IPv4 Longest Prefix Match

Definition in file rte_fib.h.

Macro Definition Documentation

#define RTE_FIB_MAXDEPTH 32

Maximum depth value possible for IPv4 FIB.

Definition at line 29 of file rte_fib.h.

Typedef Documentation

typedef int(* rte_fib_modify_fn_t) (struct rte_fib *fib, uint32_t ip, uint8_t depth, uint64_t next_hop, int op)

Modify FIB function

Definition at line 38 of file rte_fib.h.

typedef void(* rte_fib_lookup_fn_t) (void *fib, const uint32_t *ips, uint64_t *next_hops, const unsigned int n)

FIB bulk lookup function

Definition at line 41 of file rte_fib.h.

Enumeration Type Documentation

enum rte_fib_type

Type of FIB struct

Enumerator

RIB tree based FIB
DIR24_8 based FIB

Definition at line 32 of file rte_fib.h.

enum rte_fib_dir24_8_nh_sz

Size of nexthop (1 << nh_sz) bits for DIR24_8 based FIB

Definition at line 50 of file rte_fib.h.

enum rte_fib_lookup_type

Type of lookup function implementation

Enumerator

Selects the best implementation based on the max simd bitwidth
Macro based lookup function
Lookup implementation using inlined functions for different next hop sizes
Unified lookup function for all next hop sizes
Vector implementation using AVX512

Definition at line 58 of file rte_fib.h.

Function Documentation

struct rte_fib* rte_fib_create (const char * name, int socket_id, struct rte_fib_conf * conf)

Create FIB

Parameters

name FIB name
socket_id NUMA socket ID for FIB table memory allocation
conf Structure containing the configuration

Returns

Handle to the FIB object on success NULL otherwise with rte_errno set to an appropriate values.

struct rte_fib* rte_fib_find_existing (const char * name)

Find an existing FIB object and return a pointer to it.

Parameters

name Name of the fib object as passed to rte_fib_create()

Returns

Pointer to fib object or NULL if object not found with rte_errno set appropriately. Possible rte_errno values include:
•
ENOENT - required entry not available to return.

void rte_fib_free (struct rte_fib * fib)

Free an FIB object.

Parameters

fib FIB object handle created by rte_fib_create(). If fib is NULL, no operation is performed.

int rte_fib_add (struct rte_fib * fib, uint32_t ip, uint8_t depth, uint64_t next_hop)

Add a route to the FIB.

Parameters

fib FIB object handle
ip IPv4 prefix address to be added to the FIB
depth Prefix length
next_hop Next hop to be added to the FIB

Returns

0 on success, negative value otherwise

int rte_fib_delete (struct rte_fib * fib, uint32_t ip, uint8_t depth)

Delete a rule from the FIB.

Parameters

fib FIB object handle
ip IPv4 prefix address to be deleted from the FIB
depth Prefix length

Returns

0 on success, negative value otherwise

int rte_fib_lookup_bulk (struct rte_fib * fib, uint32_t * ips, uint64_t * next_hops, int n)

Lookup multiple IP addresses in the FIB.

Parameters

fib FIB object handle
ips Array of IPs to be looked up in the FIB
next_hops Next hop of the most specific rule found for IP. This is an array of eight byte values. If the lookup for the given IP failed, then corresponding element would contain default nexthop value configured for a FIB.
n Number of elements in ips (and next_hops) array to lookup.

Returns

-EINVAL for incorrect arguments, otherwise 0

void* rte_fib_get_dp (struct rte_fib * fib)

Get pointer to the dataplane specific struct

Parameters

fib FIB object handle

Returns

Pointer on the dataplane struct on success NULL otherwise

struct rte_rib* rte_fib_get_rib (struct rte_fib * fib)

Get pointer to the RIB

Parameters

fib FIB object handle

Returns

Pointer on the RIB on success NULL otherwise

int rte_fib_select_lookup (struct rte_fib * fib, enum rte_fib_lookup_type type)

Set lookup function based on type

Parameters

fib FIB object handle
type type of lookup function

Returns

0 on success -EINVAL on failure

Author

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Fri Dec 15 2023 Version 23.11.0