devargs: introduce iterator

[dpdk.git] / lib / librte_eal / common / eal_common_devargs.c

diff --git a/lib/librte_eal/common/eal_common_devargs.c b/lib/librte_eal/common/eal_common_devargs.c
index 810b3e1..c6c5eab 100644 (file)
--- a/lib/librte_eal/common/eal_common_devargs.c
+++ b/lib/librte_eal/common/eal_common_devargs.c
@@ -207,3 +207,23 @@ rte_eal_devargs_dump(FILE *f)
                        devargs->name, devargs->args);
        }
 }
+
+/* bus-aware rte_devargs iterator. */
+__rte_experimental
+struct rte_devargs *
+rte_eal_devargs_next(const char *busname, const struct rte_devargs *start)
+{
+       struct rte_devargs *da;
+
+       if (start != NULL)
+               da = TAILQ_NEXT(start, next);
+       else
+               da = TAILQ_FIRST(&devargs_list);
+       while (da != NULL) {
+               if (busname == NULL ||
+                   (strcmp(busname, da->bus->name) == 0))
+                       return da;
+               da = TAILQ_NEXT(da, next);
+       }
+       return NULL;
+}