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35 #include <rte_ether.h>
36 #include <rte_ip_frag.h>
37 #include <rte_memory.h>
39 #include "rte_port_frag.h"
41 /* Default byte size for the IPv4 Maximum Transfer Unit (MTU).
42 * This value includes the size of IPv4 header. */
43 #define IPV4_MTU_DEFAULT ETHER_MTU
45 /* Max number of fragments per packet allowed */
46 #define IPV4_MAX_FRAGS_PER_PACKET 0x80
48 struct rte_port_ring_reader_ipv4_frag {
49 /* Input parameters */
50 struct rte_ring *ring;
52 uint32_t metadata_size;
53 struct rte_mempool *pool_direct;
54 struct rte_mempool *pool_indirect;
56 /* Internal buffers */
57 struct rte_mbuf *pkts[RTE_PORT_IN_BURST_SIZE_MAX];
58 struct rte_mbuf *frags[IPV4_MAX_FRAGS_PER_PACKET];
63 } __rte_cache_aligned;
66 rte_port_ring_reader_ipv4_frag_create(void *params, int socket_id)
68 struct rte_port_ring_reader_ipv4_frag_params *conf =
69 (struct rte_port_ring_reader_ipv4_frag_params *) params;
70 struct rte_port_ring_reader_ipv4_frag *port;
72 /* Check input parameters */
74 RTE_LOG(ERR, PORT, "%s: Parameter conf is NULL\n", __func__);
77 if (conf->ring == NULL) {
78 RTE_LOG(ERR, PORT, "%s: Parameter ring is NULL\n", __func__);
82 RTE_LOG(ERR, PORT, "%s: Parameter mtu is invalid\n", __func__);
85 if (conf->pool_direct == NULL) {
86 RTE_LOG(ERR, PORT, "%s: Parameter pool_direct is NULL\n",
90 if (conf->pool_indirect == NULL) {
91 RTE_LOG(ERR, PORT, "%s: Parameter pool_indirect is NULL\n",
96 /* Memory allocation */
97 port = rte_zmalloc_socket("PORT", sizeof(*port), RTE_CACHE_LINE_SIZE,
100 RTE_LOG(ERR, PORT, "%s: port is NULL\n", __func__);
105 port->ring = conf->ring;
106 port->mtu = conf->mtu;
107 port->metadata_size = conf->metadata_size;
108 port->pool_direct = conf->pool_direct;
109 port->pool_indirect = conf->pool_indirect;
120 rte_port_ring_reader_ipv4_frag_rx(void *port,
121 struct rte_mbuf **pkts,
124 struct rte_port_ring_reader_ipv4_frag *p =
125 (struct rte_port_ring_reader_ipv4_frag *) port;
130 /* Get packets from the "frag" buffer */
131 if (p->n_frags >= n_pkts) {
132 memcpy(pkts, &p->frags[p->pos_frags], n_pkts * sizeof(void *));
133 p->pos_frags += n_pkts;
134 p->n_frags -= n_pkts;
139 memcpy(pkts, &p->frags[p->pos_frags], p->n_frags * sizeof(void *));
140 n_pkts_out = p->n_frags;
143 /* Look to "pkts" buffer to get more packets */
145 struct rte_mbuf *pkt;
146 uint32_t n_pkts_to_provide, i;
149 /* If "pkts" buffer is empty, read packet burst from ring */
150 if (p->n_pkts == 0) {
151 p->n_pkts = rte_ring_sc_dequeue_burst(p->ring,
152 (void **) p->pkts, RTE_PORT_IN_BURST_SIZE_MAX);
158 /* Read next packet from "pkts" buffer */
159 pkt = p->pkts[p->pos_pkts++];
162 /* If not jumbo, pass current packet to output */
163 if (pkt->pkt_len <= IPV4_MTU_DEFAULT) {
164 pkts[n_pkts_out++] = pkt;
166 n_pkts_to_provide = n_pkts - n_pkts_out;
167 if (n_pkts_to_provide == 0)
173 /* Fragment current packet into the "frags" buffer */
174 status = rte_ipv4_fragment_packet(
177 IPV4_MAX_FRAGS_PER_PACKET,
184 rte_pktmbuf_free(pkt);
188 p->n_frags = (uint32_t) status;
191 /* Copy meta-data from input jumbo packet to its fragments */
192 for (i = 0; i < p->n_frags; i++) {
193 uint8_t *src = RTE_MBUF_METADATA_UINT8_PTR(pkt, 0);
195 RTE_MBUF_METADATA_UINT8_PTR(p->frags[i], 0);
197 memcpy(dst, src, p->metadata_size);
200 /* Free input jumbo packet */
201 rte_pktmbuf_free(pkt);
203 /* Get packets from "frag" buffer */
204 n_pkts_to_provide = n_pkts - n_pkts_out;
205 if (p->n_frags >= n_pkts_to_provide) {
206 memcpy(&pkts[n_pkts_out], p->frags,
207 n_pkts_to_provide * sizeof(void *));
208 p->n_frags -= n_pkts_to_provide;
209 p->pos_frags += n_pkts_to_provide;
214 memcpy(&pkts[n_pkts_out], p->frags,
215 p->n_frags * sizeof(void *));
216 n_pkts_out += p->n_frags;
222 rte_port_ring_reader_ipv4_frag_free(void *port)
225 RTE_LOG(ERR, PORT, "%s: Parameter port is NULL\n", __func__);
235 * Summary of port operations
237 struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops = {
238 .f_create = rte_port_ring_reader_ipv4_frag_create,
239 .f_free = rte_port_ring_reader_ipv4_frag_free,
240 .f_rx = rte_port_ring_reader_ipv4_frag_rx,