app/testpmd: verify MTU with device provided limits

This commit uses the MTU fields populated in rte_eth_dev_info_get()
to validate the MTU value being passed in port_mtu_set().

Signed-off-by: Ian Stokes <ian.stokes@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index b9e5dd9..cadcb51 100644 (file)
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -1063,9 +1063,16 @@ void
 port_mtu_set(portid_t port_id, uint16_t mtu)
 {
        int diag;
+       struct rte_eth_dev_info dev_info;
 
        if (port_id_is_invalid(port_id, ENABLED_WARN))
                return;
+       rte_eth_dev_info_get(port_id, &dev_info);
+       if (mtu > dev_info.max_mtu || mtu < dev_info.min_mtu) {
+               printf("Set MTU failed. MTU:%u is not in valid range, min:%u - max:%u\n",
+                       mtu, dev_info.min_mtu, dev_info.max_mtu);
+               return;
+       }
        diag = rte_eth_dev_set_mtu(port_id, mtu);
        if (diag == 0)
                return;