Function bpf_eth_elf_load

dpdk/lib/bpf/bpf_pkt.c:490–558

}

static int
bpf_eth_elf_load(struct bpf_eth_cbh *cbh, uint16_t port, uint16_t queue,
	const struct rte_bpf_prm *prm, const char *fname, const char *sname,
	uint32_t flags)
{
	int32_t rc;
	struct bpf_eth_cbi *bc;
	struct rte_bpf *bpf;
	rte_rx_callback_fn frx;
	rte_tx_callback_fn ftx;
	struct rte_bpf_jit jit;

	frx = NULL;
	ftx = NULL;

	if (prm == NULL || rte_eth_dev_is_valid_port(port) == 0 ||
			queue >= RTE_MAX_QUEUES_PER_PORT)
		return -EINVAL;

	if (cbh->type == BPF_ETH_RX)
		frx = select_rx_callback(prm->prog_arg.type, flags);
	else
		ftx = select_tx_callback(prm->prog_arg.type, flags);

	if (frx == NULL && ftx == NULL) {
		RTE_BPF_LOG(ERR, "%s(%u, %u): no callback selected;\n",
			__func__, port, queue);
		return -EINVAL;
	}

	bpf = rte_bpf_elf_load(prm, fname, sname);
	if (bpf == NULL)
		return -rte_errno;

	rte_bpf_get_jit(bpf, &jit);

	if ((flags & RTE_BPF_ETH_F_JIT) != 0 && jit.func == NULL) {
		RTE_BPF_LOG(ERR, "%s(%u, %u): no JIT generated;\n",
			__func__, port, queue);
		rte_bpf_destroy(bpf);
		return -ENOTSUP;
	}

	/* setup/update global callback info */
	bc = bpf_eth_cbh_add(cbh, port, queue);
	if (bc == NULL)
		return -ENOMEM;

	/* remove old one, if any */
	if (bc->cb != NULL)
		bpf_eth_unload(cbh, port, queue);

	bc->bpf = bpf;
	bc->jit = jit;

	if (cbh->type == BPF_ETH_RX)
		bc->cb = rte_eth_add_rx_callback(port, queue, frx, bc);
	else