From: Keith Wiles <keith.wiles@intel.com>
Date: Fri, 20 Jan 2017 14:30:25 +0000 (-0600)
Subject: net/tap: fix build with old kernels
X-Git-Tag: spdx-start~4683
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=b0120a300b10e0f5ee84c304337c7cf82359b8ec;p=dpdk.git

net/tap: fix build with old kernels

IFF_MULTI_QUEUE does not exist in older kernels:
drivers/net/tap/rte_eth_tap.c:143:19: error: ‘IFF_MULTI_QUEUE’ undeclared

Signed-off-by: Keith Wiles <keith.wiles@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
---

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index 976f2d9d65..c0afc2d55b 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -140,6 +140,7 @@ tun_alloc(char *name)
 	}
 	RTE_LOG(DEBUG, PMD, "TUN/TAP Features %08x\n", features);
 
+#ifdef IFF_MULTI_QUEUE
 	if (!(features & IFF_MULTI_QUEUE) && (RTE_PMD_TAP_MAX_QUEUES > 1)) {
 		RTE_LOG(DEBUG, PMD, "TUN/TAP device only one queue\n");
 		goto error;
@@ -152,6 +153,15 @@ tun_alloc(char *name)
 		RTE_LOG(DEBUG, PMD, "Multi-queue support for %d queues\n",
 			RTE_PMD_TAP_MAX_QUEUES);
 	}
+#else
+	if (RTE_PMD_TAP_MAX_QUEUES > 1) {
+		RTE_LOG(DEBUG, PMD, "TUN/TAP device only one queue\n");
+		goto error;
+	} else {
+		ifr.ifr_flags |= IFF_ONE_QUEUE;
+		RTE_LOG(DEBUG, PMD, "Single queue only support\n");
+	}
+#endif
 
 	/* Set the TUN/TAP configuration and get the name if needed */
 	if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) {