From: Vipin Varghese <vipin.varghese@intel.com>
Date: Thu, 1 Feb 2018 18:58:42 +0000 (+0530)
Subject: examples/l2fwd: check if user portmask is valid
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=6726521997fcb35cd1ad5a7ec806772c9f6f39c8;p=dpdk.git

examples/l2fwd: check if user portmask is valid

User can pass portmask with any value, even invalid mask. The code
checks against actual portmask.

Signed-off-by: Vipin Varghese <vipin.varghese@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
---

diff --git a/examples/l2fwd/main.c b/examples/l2fwd/main.c
index 6c07ed43e1..e4a4a7c36c 100644
--- a/examples/l2fwd/main.c
+++ b/examples/l2fwd/main.c
@@ -549,6 +549,11 @@ main(int argc, char **argv)
 	if (nb_ports == 0)
 		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
 
+	/* check port mask to possible port mask */
+	if (l2fwd_enabled_port_mask & ~((1 << nb_ports) - 1))
+		rte_exit(EXIT_FAILURE, "Invalid portmask; possible (0x%x)\n",
+			(1 << nb_ports) - 1);
+
 	/* reset l2fwd_dst_ports */
 	for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++)
 		l2fwd_dst_ports[portid] = 0;