1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018 Vladimir Medvedkin <medvedkinv@gmail.com>
3 * Copyright(c) 2019 Intel Corporation
16 * All functions in this file may be changed or removed without prior notice.
18 * FIB (Forwarding information base) implementation
19 * for IPv4 Longest Prefix Match
22 #include <rte_compat.h>
31 /** Maximum depth value possible for IPv4 FIB. */
32 #define RTE_FIB_MAXDEPTH 32
34 /** Type of FIB struct */
36 RTE_FIB_DUMMY, /**< RIB tree based FIB */
37 RTE_FIB_DIR24_8 /**< DIR24_8 based FIB */
40 /** Modify FIB function */
41 typedef int (*rte_fib_modify_fn_t)(struct rte_fib *fib, uint32_t ip,
42 uint8_t depth, uint64_t next_hop, int op);
43 /** FIB bulk lookup function */
44 typedef void (*rte_fib_lookup_fn_t)(void *fib, const uint32_t *ips,
45 uint64_t *next_hops, const unsigned int n);
52 /** Size of nexthop (1 << nh_sz) bits for DIR24_8 based FIB */
53 enum rte_fib_dir24_8_nh_sz {
60 /** Type of lookup function implementation */
61 enum rte_fib_lookup_type {
62 RTE_FIB_LOOKUP_DIR24_8_SCALAR_MACRO,
63 /**< Macro based lookup function */
64 RTE_FIB_LOOKUP_DIR24_8_SCALAR_INLINE,
66 * Lookup implementation using inlined functions
67 * for different next hop sizes
69 RTE_FIB_LOOKUP_DIR24_8_SCALAR_UNI,
71 * Unified lookup function for all next hop sizes
75 /** FIB configuration structure */
77 enum rte_fib_type type; /**< Type of FIB struct */
78 /** Default value returned on lookup if there is no route */
83 enum rte_fib_dir24_8_nh_sz nh_sz;
95 * NUMA socket ID for FIB table memory allocation
97 * Structure containing the configuration
99 * Handle to the FIB object on success
100 * NULL otherwise with rte_errno set to an appropriate values.
104 rte_fib_create(const char *name, int socket_id, struct rte_fib_conf *conf);
107 * Find an existing FIB object and return a pointer to it.
110 * Name of the fib object as passed to rte_fib_create()
112 * Pointer to fib object or NULL if object not found with rte_errno
113 * set appropriately. Possible rte_errno values include:
114 * - ENOENT - required entry not available to return.
118 rte_fib_find_existing(const char *name);
121 * Free an FIB object.
130 rte_fib_free(struct rte_fib *fib);
133 * Add a route to the FIB.
138 * IPv4 prefix address to be added to the FIB
142 * Next hop to be added to the FIB
144 * 0 on success, negative value otherwise
148 rte_fib_add(struct rte_fib *fib, uint32_t ip, uint8_t depth, uint64_t next_hop);
151 * Delete a rule from the FIB.
156 * IPv4 prefix address to be deleted from the FIB
160 * 0 on success, negative value otherwise
164 rte_fib_delete(struct rte_fib *fib, uint32_t ip, uint8_t depth);
167 * Lookup multiple IP addresses in the FIB.
172 * Array of IPs to be looked up in the FIB
174 * Next hop of the most specific rule found for IP.
175 * This is an array of eight byte values.
176 * If the lookup for the given IP failed, then corresponding element would
177 * contain default nexthop value configured for a FIB.
179 * Number of elements in ips (and next_hops) array to lookup.
181 * -EINVAL for incorrect arguments, otherwise 0
185 rte_fib_lookup_bulk(struct rte_fib *fib, uint32_t *ips,
186 uint64_t *next_hops, int n);
188 * Get pointer to the dataplane specific struct
193 * Pointer on the dataplane struct on success
198 rte_fib_get_dp(struct rte_fib *fib);
201 * Get pointer to the RIB
206 * Pointer on the RIB on success
211 rte_fib_get_rib(struct rte_fib *fib);
214 * Set lookup function based on type
219 * type of lookup function
227 rte_fib_select_lookup(struct rte_fib *fib, enum rte_fib_lookup_type type);
233 #endif /* _RTE_FIB_H_ */