return bpf;
}
-__rte_experimental struct rte_bpf *
+/*
+ * Check that user provided external symbol.
+ */
+static int
+bpf_check_xsym(const struct rte_bpf_xsym *xsym)
+{
+ uint32_t i;
+
+ if (xsym->name == NULL)
+ return -EINVAL;
+
+ if (xsym->type == RTE_BPF_XTYPE_VAR) {
+ if (xsym->var.desc.type == RTE_BPF_ARG_UNDEF)
+ return -EINVAL;
+ } else if (xsym->type == RTE_BPF_XTYPE_FUNC) {
+
+ if (xsym->func.nb_args > EBPF_FUNC_MAX_ARGS)
+ return -EINVAL;
+
+ /* check function arguments */
+ for (i = 0; i != xsym->func.nb_args; i++) {
+ if (xsym->func.args[i].type == RTE_BPF_ARG_UNDEF)
+ return -EINVAL;
+ }
+
+ /* check return value info */
+ if (xsym->func.ret.type != RTE_BPF_ARG_UNDEF &&
+ xsym->func.ret.size == 0)
+ return -EINVAL;
+ } else
+ return -EINVAL;
+
+ return 0;
+}
+
+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) {
+ 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 bpf;
}
+
+#ifndef RTE_LIBRTE_BPF_ELF
+struct rte_bpf *
+rte_bpf_elf_load(const struct rte_bpf_prm *prm, const char *fname,
+ const char *sname)
+{
+ if (prm == NULL || fname == NULL || sname == NULL) {
+ rte_errno = EINVAL;
+ return NULL;
+ }
+
+ RTE_BPF_LOG(ERR, "%s() is not supported with current config\n"
+ "rebuild with libelf installed\n",
+ __func__);
+ rte_errno = ENOTSUP;
+ return NULL;
+}
+#endif