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42 * The KNI library provides the ability to create and destroy kernel NIC
43 * interfaces that may be used by the RTE application to receive/transmit
44 * packets from/to Linux kernel net interfaces.
46 * This library provide two APIs to burst receive packets from KNI interfaces,
47 * and burst transmit packets to KNI interfaces.
59 * Structure which has the function pointers for KNI interface.
62 /* Pointer to function of changing MTU */
63 int (*change_mtu)(uint8_t port_id, unsigned new_mtu);
65 /* Pointer to function of configuring network interface */
66 int (*config_network_if)(uint8_t port_id, uint8_t if_up);
70 * Create kni interface according to the port id. It will create a paired KNI
71 * interface in the kernel space for each NIC port. The KNI interface created
72 * in the kernel space is the net interface the traditional Linux application
78 * The mempool for allocting mbufs for packets.
80 * The mbuf size to store a packet.
83 * - The pointer to the context of a kni interface.
84 * - NULL indicate error.
86 extern struct rte_kni *rte_kni_create(uint8_t port_id, unsigned mbuf_size,
87 struct rte_mempool *pktmbuf_pool, struct rte_kni_ops *ops);
90 * Retrieve a burst of packets from a kni interface. The retrieved packets are
91 * stored in rte_mbuf structures whose pointers are supplied in the array of
92 * mbufs, and the maximum number is indicated by num. It handles the freeing of
93 * the mbufs in the free queue of kni interface.
96 * The kni interface context.
98 * The array to store the pointers of mbufs.
100 * The maximum number per burst.
103 * The actual number of packets retrieved.
105 extern unsigned rte_kni_rx_burst(struct rte_kni *kni,
106 struct rte_mbuf **mbufs, unsigned num);
109 * Send a burst of packets to a kni interface. The packets to be sent out are
110 * stored in rte_mbuf structures whose pointers are supplied in the array of
111 * mbufs, and the maximum number is indicated by num. It handles allocating
112 * the mbufs for kni interface alloc queue.
115 * The kni interface context.
117 * The array to store the pointers of mbufs.
119 * The maximum number per burst.
122 * The actual number of packets sent.
124 extern unsigned rte_kni_tx_burst(struct rte_kni *kni,
125 struct rte_mbuf **mbufs, unsigned num);
128 * Get the port id from kni interface.
131 * The kni interface context.
134 * On success: The port id.
137 extern uint8_t rte_kni_get_port_id(struct rte_kni *kni);
143 #endif /* _RTE_KNI_H_ */