From: Hemant Agrawal <hemant.agrawal@nxp.com>
Date: Thu, 18 Jan 2018 06:13:00 +0000 (+0530)
Subject: kni: set initial value for MTU
X-Git-Url: http://git.droids-corp.org/?p=dpdk.git;a=commitdiff_plain;h=abdf63d11b0917bde76fa5a73c16363bc497085b

kni: set initial value for MTU

Configure initial application provided  mtu on the KNI interface.

Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>
---

diff --git a/examples/kni/main.c b/examples/kni/main.c
index bd3b329f8e..0d9980ee1e 100644
--- a/examples/kni/main.c
+++ b/examples/kni/main.c
@@ -846,6 +846,8 @@ kni_alloc(uint16_t port_id)
 			rte_eth_macaddr_get(port_id,
 					(struct ether_addr *)&conf.mac_addr);
 
+			rte_eth_dev_get_mtu(port_id, &conf.mtu);
+
 			memset(&ops, 0, sizeof(ops));
 			ops.port_id = port_id;
 			ops.change_mtu = kni_change_mtu;
diff --git a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
index b186417cd4..cfa9448bd0 100644
--- a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
+++ b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
@@ -120,6 +120,7 @@ struct rte_kni_device_info {
 
 	/* mbuf size */
 	unsigned mbuf_size;
+	unsigned int mtu;
 	char mac_addr[6];
 };
 
diff --git a/lib/librte_eal/linuxapp/kni/kni_misc.c b/lib/librte_eal/linuxapp/kni/kni_misc.c
index 83649ce49d..01574ecf74 100644
--- a/lib/librte_eal/linuxapp/kni/kni_misc.c
+++ b/lib/librte_eal/linuxapp/kni/kni_misc.c
@@ -451,6 +451,9 @@ kni_ioctl_create(struct net *net, uint32_t ioctl_num,
 			random_ether_addr(net_dev->dev_addr);
 	}
 
+	if (dev_info.mtu)
+		net_dev->mtu = dev_info.mtu;
+
 	ret = register_netdev(net_dev);
 	if (ret) {
 		pr_err("error %i registering device \"%s\"\n",
diff --git a/lib/librte_kni/rte_kni.c b/lib/librte_kni/rte_kni.c
index c089a49a26..28674115ff 100644
--- a/lib/librte_kni/rte_kni.c
+++ b/lib/librte_kni/rte_kni.c
@@ -340,6 +340,7 @@ rte_kni_alloc(struct rte_mempool *pktmbuf_pool,
 	dev_info.force_bind = conf->force_bind;
 	dev_info.group_id = conf->group_id;
 	dev_info.mbuf_size = conf->mbuf_size;
+	dev_info.mtu = conf->mtu;
 
 	memcpy(dev_info.mac_addr, conf->mac_addr, ETHER_ADDR_LEN);
 
diff --git a/lib/librte_kni/rte_kni.h b/lib/librte_kni/rte_kni.h
index 711c2a980a..99055e2c25 100644
--- a/lib/librte_kni/rte_kni.h
+++ b/lib/librte_kni/rte_kni.h
@@ -69,6 +69,7 @@ struct rte_kni_conf {
 	__extension__
 	uint8_t force_bind : 1; /* Flag to bind kernel thread */
 	char mac_addr[ETHER_ADDR_LEN]; /* MAC address assigned to KNI */
+	uint16_t mtu;
 };
 
 /**