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35 #include <rte_ether.h>
36 #include <rte_ip_frag.h>
38 #include "rte_port_frag.h"
40 /* Default byte size for the IPv4 Maximum Transfer Unit (MTU).
41 * This value includes the size of IPv4 header. */
42 #define IPV4_MTU_DEFAULT ETHER_MTU
44 /* Max number of fragments per packet allowed */
45 #define IPV4_MAX_FRAGS_PER_PACKET 0x80
47 struct rte_port_ring_reader_ipv4_frag {
48 /* Input parameters */
49 struct rte_ring *ring;
51 uint32_t metadata_size;
52 struct rte_mempool *pool_direct;
53 struct rte_mempool *pool_indirect;
55 /* Internal buffers */
56 struct rte_mbuf *pkts[RTE_PORT_IN_BURST_SIZE_MAX];
57 struct rte_mbuf *frags[IPV4_MAX_FRAGS_PER_PACKET];
62 } __rte_cache_aligned;
65 rte_port_ring_reader_ipv4_frag_create(void *params, int socket_id)
67 struct rte_port_ring_reader_ipv4_frag_params *conf =
68 (struct rte_port_ring_reader_ipv4_frag_params *) params;
69 struct rte_port_ring_reader_ipv4_frag *port;
71 /* Check input parameters */
73 RTE_LOG(ERR, PORT, "%s: Parameter conf is NULL\n", __func__);
76 if (conf->ring == NULL) {
77 RTE_LOG(ERR, PORT, "%s: Parameter ring is NULL\n", __func__);
81 RTE_LOG(ERR, PORT, "%s: Parameter mtu is invalid\n", __func__);
84 if (conf->pool_direct == NULL) {
85 RTE_LOG(ERR, PORT, "%s: Parameter pool_direct is NULL\n",
89 if (conf->pool_indirect == NULL) {
90 RTE_LOG(ERR, PORT, "%s: Parameter pool_indirect is NULL\n",
95 /* Memory allocation */
96 port = rte_zmalloc_socket("PORT", sizeof(*port), CACHE_LINE_SIZE,
99 RTE_LOG(ERR, PORT, "%s: port is NULL\n", __func__);
104 port->ring = conf->ring;
105 port->mtu = conf->mtu;
106 port->metadata_size = conf->metadata_size;
107 port->pool_direct = conf->pool_direct;
108 port->pool_indirect = conf->pool_indirect;
119 rte_port_ring_reader_ipv4_frag_rx(void *port,
120 struct rte_mbuf **pkts,
123 struct rte_port_ring_reader_ipv4_frag *p =
124 (struct rte_port_ring_reader_ipv4_frag *) port;
129 /* Get packets from the "frag" buffer */
130 if (p->n_frags >= n_pkts) {
131 memcpy(pkts, &p->frags[p->pos_frags], n_pkts * sizeof(void *));
132 p->pos_frags += n_pkts;
133 p->n_frags -= n_pkts;
138 memcpy(pkts, &p->frags[p->pos_frags], p->n_frags * sizeof(void *));
139 n_pkts_out = p->n_frags;
142 /* Look to "pkts" buffer to get more packets */
144 struct rte_mbuf *pkt;
145 uint32_t n_pkts_to_provide, i;
148 /* If "pkts" buffer is empty, read packet burst from ring */
149 if (p->n_pkts == 0) {
150 p->n_pkts = rte_ring_sc_dequeue_burst(p->ring,
151 (void **) p->pkts, RTE_PORT_IN_BURST_SIZE_MAX);
157 /* Read next packet from "pkts" buffer */
158 pkt = p->pkts[p->pos_pkts++];
161 /* If not jumbo, pass current packet to output */
162 if (pkt->pkt.pkt_len <= IPV4_MTU_DEFAULT) {
163 pkts[n_pkts_out++] = pkt;
165 n_pkts_to_provide = n_pkts - n_pkts_out;
166 if (n_pkts_to_provide == 0)
172 /* Fragment current packet into the "frags" buffer */
173 status = rte_ipv4_fragment_packet(
176 IPV4_MAX_FRAGS_PER_PACKET,
183 rte_pktmbuf_free(pkt);
187 p->n_frags = (uint32_t) status;
190 /* Copy meta-data from input jumbo packet to its fragments */
191 for (i = 0; i < p->n_frags; i++) {
192 uint8_t *src = RTE_MBUF_METADATA_UINT8_PTR(pkt, 0);
194 RTE_MBUF_METADATA_UINT8_PTR(p->frags[i], 0);
196 memcpy(dst, src, p->metadata_size);
199 /* Free input jumbo packet */
200 rte_pktmbuf_free(pkt);
202 /* Get packets from "frag" buffer */
203 n_pkts_to_provide = n_pkts - n_pkts_out;
204 if (p->n_frags >= n_pkts_to_provide) {
205 memcpy(&pkts[n_pkts_out], p->frags,
206 n_pkts_to_provide * sizeof(void *));
207 p->n_frags -= n_pkts_to_provide;
208 p->pos_frags += n_pkts_to_provide;
213 memcpy(&pkts[n_pkts_out], p->frags,
214 p->n_frags * sizeof(void *));
215 n_pkts_out += p->n_frags;
221 rte_port_ring_reader_ipv4_frag_free(void *port)
224 RTE_LOG(ERR, PORT, "%s: Parameter port is NULL\n", __func__);
234 * Summary of port operations
236 struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops = {
237 .f_create = rte_port_ring_reader_ipv4_frag_create,
238 .f_free = rte_port_ring_reader_ipv4_frag_free,
239 .f_rx = rte_port_ring_reader_ipv4_frag_rx,