Function rte_bpf_load

dpdk/lib/bpf/bpf_load.c:82–125

}

struct rte_bpf *
rte_bpf_load(const struct rte_bpf_prm *prm)
{
	struct rte_bpf *bpf;
	int32_t rc;
	uint32_t i;

	if (prm == NULL || prm->ins == NULL ||
			(prm->nb_xsym != 0 && prm->xsym == NULL)) {
		rte_errno = EINVAL;
		return NULL;
	}

	rc = 0;
	for (i = 0; i != prm->nb_xsym && rc == 0; i++)
		rc = bpf_check_xsym(prm->xsym + i);

	if (rc != 0) {
		rte_errno = -rc;
		RTE_BPF_LOG(ERR, "%s: %d-th xsym is invalid\n", __func__, i);
		return NULL;
	}

	bpf = bpf_load(prm);
	if (bpf == NULL) {
		rte_errno = ENOMEM;
		return NULL;
	}

	rc = __rte_bpf_validate(bpf);
	if (rc == 0) {
		__rte_bpf_jit(bpf);
		if (mprotect(bpf, bpf->sz, PROT_READ) != 0)
			rc = -ENOMEM;
	}

	if (rc != 0) {
		rte_bpf_destroy(bpf);
		rte_errno = -rc;
		return NULL;
	}

	return bpf;
}