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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(C) 2023 Marvell.
*/
#include <arpa/inet.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <eal_export.h>
#include <rte_cycles.h>
#include <rte_debug.h>
#include <rte_ethdev.h>
#include <rte_ether.h>
#include <rte_graph.h>
#include <rte_graph_worker.h>
#include <rte_ip.h>
#include <rte_ip_frag.h>
#include <rte_mbuf.h>
#include <rte_tcp.h>
#include <rte_udp.h>
#include "rte_node_ip4_api.h"
#include "ip4_reassembly_priv.h"
#include "node_private.h"
struct ip4_reassembly_elem {
struct ip4_reassembly_elem *next;
struct ip4_reassembly_ctx ctx;
rte_node_t node_id;
};
/* IP4 reassembly global data struct */
struct ip4_reassembly_node_main {
struct ip4_reassembly_elem *head;
};
typedef struct ip4_reassembly_ctx ip4_reassembly_ctx_t;
typedef struct ip4_reassembly_elem ip4_reassembly_elem_t;
static struct ip4_reassembly_node_main ip4_reassembly_main;
static uint16_t
ip4_reassembly_node_process(struct rte_graph *graph, struct rte_node *node, void **objs,
uint16_t nb_objs)
{
#define PREFETCH_OFFSET 4
struct rte_mbuf *mbuf, *mbuf_out;
struct rte_ip_frag_death_row *dr;
struct ip4_reassembly_ctx *ctx;
struct rte_ipv4_hdr *ipv4_hdr;
struct rte_ip_frag_tbl *tbl;
void **to_next, **to_free;
uint16_t idx = 0;
int i;
ctx = (struct ip4_reassembly_ctx *)node->ctx;
/* Get core specific reassembly tbl */
tbl = ctx->tbl;
dr = ctx->dr;
for (i = 0; i < PREFETCH_OFFSET && i < nb_objs; i++) {
rte_prefetch0(rte_pktmbuf_mtod_offset((struct rte_mbuf *)objs[i], void *,
sizeof(struct rte_ether_hdr)));
}
to_next = node->objs;
for (i = 0; i < nb_objs - PREFETCH_OFFSET; i++) {
#if RTE_GRAPH_BURST_SIZE > 64
/* Prefetch next-next mbufs */
if (likely(i + 8 < nb_objs))
rte_prefetch0(objs[i + 8]);
#endif
rte_prefetch0(rte_pktmbuf_mtod_offset((struct rte_mbuf *)objs[i + PREFETCH_OFFSET],
void *, sizeof(struct rte_ether_hdr)));
mbuf = (struct rte_mbuf *)objs[i];
ipv4_hdr = rte_pktmbuf_mtod_offset(mbuf, struct rte_ipv4_hdr *,
sizeof(struct rte_ether_hdr));
if (rte_ipv4_frag_pkt_is_fragmented(ipv4_hdr)) {
/* prepare mbuf: setup l2_len/l3_len. */
mbuf->l2_len = sizeof(struct rte_ether_hdr);
mbuf->l3_len = sizeof(struct rte_ipv4_hdr);
mbuf_out = rte_ipv4_frag_reassemble_packet(tbl, dr, mbuf, rte_rdtsc(),
ipv4_hdr);
} else {
mbuf_out = mbuf;
}
if (mbuf_out)
to_next[idx++] = (void *)mbuf_out;
}
for (; i < nb_objs; i++) {
mbuf = (struct rte_mbuf *)objs[i];
ipv4_hdr = rte_pktmbuf_mtod_offset(mbuf, struct rte_ipv4_hdr *,
sizeof(struct rte_ether_hdr));
if (rte_ipv4_frag_pkt_is_fragmented(ipv4_hdr)) {
/* prepare mbuf: setup l2_len/l3_len. */
mbuf->l2_len = sizeof(struct rte_ether_hdr);
mbuf->l3_len = sizeof(struct rte_ipv4_hdr);
mbuf_out = rte_ipv4_frag_reassemble_packet(tbl, dr, mbuf, rte_rdtsc(),
ipv4_hdr);
} else {
mbuf_out = mbuf;
}
if (mbuf_out)
to_next[idx++] = (void *)mbuf_out;
}
node->idx = idx;
rte_node_next_stream_move(graph, node, 1);
if (dr->cnt) {
to_free = rte_node_next_stream_get(graph, node,
RTE_NODE_IP4_REASSEMBLY_NEXT_PKT_DROP, dr->cnt);
rte_memcpy(to_free, dr->row, dr->cnt * sizeof(to_free[0]));
rte_node_next_stream_put(graph, node, RTE_NODE_IP4_REASSEMBLY_NEXT_PKT_DROP,
dr->cnt);
idx += dr->cnt;
NODE_INCREMENT_XSTAT_ID(node, 0, dr->cnt, dr->cnt);
dr->cnt = 0;
}
return idx;
}
RTE_EXPORT_EXPERIMENTAL_SYMBOL(rte_node_ip4_reassembly_configure, 23.11)
int
rte_node_ip4_reassembly_configure(struct rte_node_ip4_reassembly_cfg *cfg, uint16_t cnt)
{
ip4_reassembly_elem_t *elem;
int i;
for (i = 0; i < cnt; i++) {
elem = malloc(sizeof(ip4_reassembly_elem_t));
if (elem == NULL)
return -ENOMEM;
elem->ctx.dr = cfg[i].dr;
elem->ctx.tbl = cfg[i].tbl;
elem->node_id = cfg[i].node_id;
elem->next = ip4_reassembly_main.head;
ip4_reassembly_main.head = elem;
}
return 0;
}
static int
ip4_reassembly_node_init(const struct rte_graph *graph, struct rte_node *node)
{
ip4_reassembly_ctx_t *ctx = (ip4_reassembly_ctx_t *)node->ctx;
ip4_reassembly_elem_t *elem = ip4_reassembly_main.head;
RTE_SET_USED(graph);
while (elem) {
if (elem->node_id == node->id) {
/* Update node specific context */
*ctx = elem->ctx;
break;
}
elem = elem->next;
}
return 0;
}
static struct rte_node_xstats ip4_reassembly_xstats = {
.nb_xstats = 1,
.xstat_desc = {
[0] = "ip4_reassembly_error",
},
};
static struct rte_node_register ip4_reassembly_node = {
.process = ip4_reassembly_node_process,
.name = "ip4_reassembly",
.init = ip4_reassembly_node_init,
.xstats = &ip4_reassembly_xstats,
.nb_edges = RTE_NODE_IP4_REASSEMBLY_NEXT_PKT_DROP + 1,
.next_nodes = {
[RTE_NODE_IP4_REASSEMBLY_NEXT_PKT_DROP] = "pkt_drop",
},
};
struct rte_node_register *
ip4_reassembly_node_get(void)
{
return &ip4_reassembly_node;
}
RTE_NODE_REGISTER(ip4_reassembly_node);
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